Air pre-purification device capable of automatically discharging ash

Abstract

The utility model discloses an air pre-purification device capable of automatically discharging ash, which comprises a confluence component, a rotational flow component, a dust collection component and an air outlet pipe, and the air outlet pipe penetrates through the rotational flow component and the dust collection component along the vertical direction and is arranged close to the side edges of the rotational flow component and the dust collection component. A plurality of cyclone pipes in the cyclone assembly and a dust collection basin in the dust collection assembly are all concentrated on the same side of the air outlet pipe, an ash discharge valve body assembly is arranged at an ash discharge port of the dust collection basin, a first path used for dust movement and a second path used for gas movement are formed in the ash discharge valve body assembly, the first path is communicated with the ash discharge port, and the second path is communicated with the air outlet pipe. The second path is communicated with the air source, the first path and the second path intersect with each other at the lower part of the ash discharge valve body assembly, and the air source introduces air into the second path, so that dust in the ash collection basin is discharged along the first path. According to the utility model, the ash discharge action can be automatically realized, and the working efficiency and the operation convenience of ash discharge are greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of engine air intake filtration, in particular to an air pre-purification device capable of automatically discharging dust. Background Art

[0002] Engines require air to operate. To reduce or prevent dust and impurities from entering the engine through the airflow, an air filter is typically installed in the engine's intake system. This filter element filters the incoming air. While effective, frequent replacement is costly and inconvenient.

[0003] Existing engine intake systems incorporate an air pre-cleaner before the traditional air filter to pre-filter the air entering the filter element. This pre-cleaner removes a significant amount of dust and impurities, keeping the air filter clean for extended periods, thus enhancing engine performance. It also extends the life of the air filter element, reducing replacement frequency and lowering engine maintenance costs.

[0004] However, the large amount of dust and impurities filtered by the current air pre-purification device are collected in a closed ash collecting basin. The capacity of the ash collecting basin is limited. After it is full of dust and impurities, it needs to be cleaned in time, and the power machinery loaded with the air pre-purification device needs to be stopped, and then the ash collecting basin is manually opened for cleaning. If the cleaning is not timely, it is easy to cause damage to the engine. Therefore, the current structure of the air pre-purification device leads to a method of cleaning the ash collecting basin that greatly reduces work efficiency, increases the work intensity and repetitive work of personnel, is inconvenient and has low economic benefits. Utility Model Content

[0005] The purpose of this utility model is to provide an air pre-purification device that can automatically discharge dust, automatically realize the dust discharge action, and achieve the effect of improving the dust discharge efficiency and operational convenience. The specific technical solution is as follows:

[0006] The ash discharge port of the ash collecting basin is connected with the ash discharge valve body, and the ash discharge valve body has the advantages of convenient operation and low cost.

[0007] Furthermore, it also includes a control module and a pneumatic pipeline. The two ends of the pneumatic pipeline are respectively connected to the air source and the ash discharge valve body assembly. The control module is arranged on the pneumatic pipeline. The control module can control the on and off of the pneumatic pipeline to open or close the ash discharge valve body assembly. A containing cover is provided on the ash collecting basin, and the control module is arranged in the containing cover.

[0008] Further, the swirl assembly includes an upper plate, the swirl tube includes an inner tube, the air outlet pipe includes an upper tube, the upper tube and the inner tubes of the multiple swirl tubes are integrally formed with the upper plate, and the upper tube is offset and arranged on one side of the upper plate so that the inner tubes of the multiple swirl tubes are concentrated on the same side of the upper tube; and / or, the swirl assembly includes a lower plate, the swirl tube includes an outer tube, the air outlet pipe includes a lower tube, the lower tube and the outer tubes of the multiple swirl tubes are integrally formed with the lower plate, and the lower tube is offset and arranged on one side of the lower plate so that the outer tubes of the multiple swirl tubes are concentrated on the same side of the lower tube.

[0009] Furthermore, multiple swirl tubes in the swirl assembly are arranged in a semicircular shape around the outlet pipe, a groove structure with a single-side opening is formed on the ash collecting basin, the outlet pipe is embedded in the groove structure through the opening, and the ash collecting basin is provided with extensions on both sides of the groove structure, and the extensions are extended toward the side walls of the outlet pipe.

[0010] Furthermore, the ash collecting basin includes an upper wall and a lower wall connected to each other, the upper wall is surrounded by multiple upper wall surfaces, and the upper wall close to the air outlet pipe is recessed toward the middle of the ash collecting basin to form a tubular chamber that can accommodate the air outlet pipe, and the lower wall is surrounded by multiple inclined lower wall surfaces, and the bottom converges to form an ash discharge port.

[0011] Furthermore, a connection area for connecting with the ash collecting basin is provided in the ash discharge valve body assembly, and a dust gathering area is provided below the connection area. The dust gathering area includes an inclined slope, and the slope can make the dust gathering area as a whole have a funnel-shaped structure that is wide at the top and narrow at the bottom. A gas collection area is provided around the outside of the dust gathering area, and a dust gas discharge area is provided below the dust gathering area. The gas collection area and the dust gas discharge area are connected through the air outlet, and the air source is connected to the gas collection area. A normally closed ash discharge nozzle is connected below the dust gas discharge area. When the gas flows along the gas collection area to the dust gas discharge area, the ash discharge nozzle opens and discharges the gas to discharge the dust in the dust collection area from the ash discharge nozzle.

[0012] Furthermore, a guide structure is provided in the dust gas discharge area, and the guide structure is inclined toward the dust discharge nozzle to guide the gas flowing out of the gas collection area to move toward the location of the dust discharge nozzle.

[0013] Furthermore, the ash discharge valve body assembly includes a detachably connected shell and a valve core, the upper end of the shell is connected to the ash discharge port of the ash collecting basin, and the lower end of the shell is connected to the ash discharge nozzle. The valve core is located in the shell, and the valve core is a hollow structure with two ends through, including an inclined ninth side wall, and a vertically arranged tenth side wall is connected below the ninth side wall. The ninth side wall and the tenth side wall of the valve core are respectively sealed with the shell to form an air cavity between the shell and the ninth side wall and the tenth side wall of the valve core. At least one air duct is provided on the tenth side wall, and an air inlet connected to the air cavity is provided on the shell.

[0014] Furthermore, the air channel includes an upper port and a lower port, the upper port is arranged on the outside of the tenth side wall, and the lower port is arranged at the bottom of the tenth side wall. The upper end of the ninth side wall and the lower end of the tenth side wall of the valve core are respectively sealed with the shell to form an air cavity between the shell and the ninth side wall and the tenth side wall of the valve core, and at least one air channel is arranged at the bottom of the tenth side wall.

[0015] Furthermore, the shell includes a detachably connected valve body outer cover and a first adapter, the lower end of the valve core abuts against the abutment on the valve body outer cover, the upper end of the valve core abuts against the lower end of the first adapter, and the upper end of the first adapter is connected to the ash discharge port of the ash collecting basin to fix the valve core in the valve body outer cover.

[0016] Furthermore, a third connecting member is provided on the outer cover of the valve body, a second boss is formed on the third connecting member, the lower end of the valve core abuts the second boss, and a fifth flange is extended laterally outward from the bottom of the tenth side wall of the valve core, and a second sealing groove is formed between the fifth flange and the second boss; and / or, a second connecting member is provided on the outer cover of the valve body, a first boss is formed on the second connecting member, a third flange is extended laterally outward from the top of the ninth side wall of the valve core, the third flange abuts the first boss, the upper part of the second connecting member is connected to the third side wall, the third side wall is detachably connected to the first adapter, a fourth flange is extended longitudinally upward from the top of the ninth side wall of the valve core, the lower end of the first adapter abuts the fourth flange, and a first sealing groove is formed between the lower end of the first adapter and the third side wall, the third flange and the fourth flange.

[0017] Furthermore, the air duct is integrally formed and penetrates the bottom of the tenth side wall, and is inclined from top to bottom gradually approaching the central axis of the valve core. A guide wall is provided at the position corresponding to the air duct outlet on the third connecting piece. The guide wall is in an inverted cone shape and is inclined toward the ash discharge nozzle.

[0018] Furthermore, the first adapter is a hollow structure with both ends through, including a first side wall, a second side wall and a first connecting member. The circumferential dimensions of the first side wall and the second side wall are different. One end of the first connecting member is connected to the bottom of the first side wall, and the other end is connected to the top of the second side wall. The top of the first side wall is connected to the ash discharge port of the ash collecting basin, and the bottom of the second side wall is connected to the outer cover of the valve body.

[0019] Furthermore, the outer cover of the valve body is a hollow structure with both ends through, including a fourth side wall and a fifth side wall. The fourth side wall is extended vertically to form a gap with the tenth side wall of the valve core in the lateral direction. The fifth side wall is gradually arranged from top to bottom toward the central axis of the valve body cover, and forms a gap with the ninth side wall of the valve core in the vertical direction. The fourth side wall, the fifth side wall, the ninth side wall and the tenth side wall together enclose an air cavity.

[0020] Furthermore, the ash discharge valve body assembly includes a detachably connected valve body outer cover and a valve core. The valve body outer cover includes a first outer wall, a second outer wall and a third outer wall connected in sequence from top to bottom. The first outer wall is detachably connected to the ash collecting basin. The second outer wall is inclined from top to bottom gradually approaching the central axis of the valve body outer cover. A cavity for accommodating the valve core is formed inside the third outer wall, and an air inlet hole is provided on the third outer wall.

[0021] Furthermore, the outer cover of the valve body includes a first protrusion, which is arranged at the top of the third outer wall. The lower part of the outer cover of the valve body is connected to the second adapter. The upper end of the valve core is abutted against the first protrusion, and the lower end of the valve core is abutted against the second adapter, so that the valve core is fixedly arranged inside the outer cover of the valve body.

[0022] Furthermore, the valve core is a hollow structure with both ends passed through, and is arranged relative to the third outer wall of the valve body outer cover. A second protrusion and a third protrusion are arranged on the valve core, and the second protrusion abuts the third outer wall to form a third sealing groove, and a third sealing ring is placed in the third sealing groove. The third protrusion abuts the third outer wall to form a fourth sealing groove, and a fourth sealing ring is placed in the fourth sealing groove.

[0023] Furthermore, the valve core includes a fourth outer wall and a fifth outer wall, and the distance between the fourth outer wall and the third outer wall is greater than the distance between the fifth outer wall and the third outer wall, so as to form an air cavity that is narrow at the top and wide at the bottom between the valve core and the outer cover of the valve body, and an air duct connecting the air cavity and the gas discharge area is provided at the bottom of the fifth outer wall.

[0024] Furthermore, the second adapter includes a sixth outer wall and a seventh outer wall, the sixth outer wall is detachably connected to the third outer wall of the valve body outer cover, the seventh outer wall is connected to the ash discharge nozzle, the inner side of the sixth outer wall is inclined from top to bottom toward the central axis of the second adapter to guide the movement direction of the gas flowing out of the airway, and a fourth protrusion is provided on the second adapter, and the fourth protrusion is set outward from the second adapter to abut against the ash discharge nozzle.

[0025] Furthermore, it also includes an ash discharge control component, which includes a control module and a pneumatic pipeline. The two ends of the pneumatic pipeline are respectively connected to the air source and the ash discharge valve body component. The control module is arranged on the pneumatic pipeline. The control module can control the on and off of the pneumatic pipeline to open or close the ash discharge valve body component.

[0026] Furthermore, a mechanical valve for controlling the on-off of the pneumatic pipeline is provided in the control module. The mechanical valve is set with a predetermined air pressure value. When the air pressure in the air source reaches the predetermined value of the mechanical valve, the mechanical valve automatically opens.

[0027] Furthermore, a solenoid valve for controlling the on and off of the pneumatic pipeline is provided in the control module. The control module can monitor at least one parameter among the air pressure in the air source, the opening time of the solenoid valve, the closing time of the solenoid valve, the throttle opening of the power machinery and the engine speed to control the opening and closing of the solenoid valve.

[0028] Furthermore, the control module monitors the air pressure in the air source, the opening time and closing time of the solenoid valve. When the solenoid valve is controlled to be closed, the response priority of the opening time of the solenoid valve is higher than the response priority of the air pressure value in the external air source.

[0029] Furthermore, it is characterized in that an air intake mesh cover is provided on the outside of the swirl component, and a mesh cover cleaning assembly is provided on the air pre-purification device at a position close to the air intake mesh cover. The mesh cover cleaning assembly includes a cleaning ring, an air duct is formed inside the cleaning ring, and the air duct is connected to the air source. The cleaning ring is provided with blowing holes facing the air intake mesh cover, and the dust discharge control assembly is also used to control the mesh cover cleaning assembly.

[0030] Furthermore, the pneumatic pipeline includes a main pipeline, a first branch and a second branch. One end of the main pipeline is connected to the air pump, and the other end is connected to the first branch and the second branch respectively. The first branch is connected to the ash discharge valve body assembly, and the second branch is connected to the cleaning ring. A first control valve is set on the first branch, and a second control valve is set on the second branch. The first control valve and the second control valve respectively control the on and off of the gas transported in the first branch and the second branch.

[0031] The air pre-purification device capable of automatically discharging dust of the utility model has the following advantages:

[0032] 1. The automatic dust discharge device is provided with a housing and a valve core. The first path passes through the hollow channel of the valve core. The gas collection area on the second path is formed between the valve core and the housing. The dust discharge area on the first path and the gas discharge area on the second path intersect with each other, so as to automatically attract and discharge dust from the dust collection area downward, thereby improving the dust discharge efficiency and convenience.

[0033] 2. It can better concentrate the space for accommodating dust in the ash collecting basin, and the ash discharge operation of the ash collecting basin is also more convenient, which is suitable for automatic ash discharge. At the same time, the connection stability between the air outlet pipe and the swirl component, the converging component, and the dust collecting component is good, which enhances the overall structural strength of the air pre-purification device, ensures the installation stability and working stability of the air pre-purification device, and is conducive to simplifying the connection and installation process of the air outlet pipe and the swirl component. The air outlet pipe, the upper plate and the lower plate have good sealing performance;

[0034] 3. The ash discharge volume is large, which effectively increases the total amount and speed of ash discharge per unit time and improves the ash discharge efficiency;

[0035] 4. Easy to disassemble and maintain, and good sealing effect;

[0036] 5. Simplified the production process and reduced production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a three-dimensional diagram of the utility model of the air pre-purification device capable of automatically discharging dust.

[0038] Figure 2 yes Figure 1 sectional view of .

[0039] Figure 3 It is an overall schematic diagram of the first embodiment of the automatic dust discharge device in the present utility model.

[0040] Figure 4 yes Figure 3 Cross-section Figure 1 .

[0041] Figure 5 yes Figure 3A three-dimensional view of the first adapter.

[0042] Figure 6 yes Figure 3 A three-dimensional view of the outer cover of the middle valve body.

[0043] Figure 7 yes Figure 3 A three-dimensional view of the middle valve core.

[0044] Figure 8 yes Figure 7 sectional view of .

[0045] Figure 9 yes Figure 3 Cross-section Figure 2 .

[0046] Figure 10 yes Figure 3 Three-dimensional view of the middle ash discharge nozzle.

[0047] Figure 11 It is an overall schematic diagram of the second embodiment of the automatic dust discharge device in the present utility model.

[0048] Figure 12 yes Figure 11 sectional view of .

[0049] Figure 13 yes Figure 11 Cross-sectional view of the outer cover of the middle valve body.

[0050] Figure 14 yes Figure 11 Cross-sectional view of the middle valve core.

[0051] Figure 15 yes Figure 11 Cross-sectional view of the second adapter.

[0052] Figure 16 This is an exploded view of the air pre-purification device with automatic dust discharge according to the utility model.

[0053] Figure 17 This is an exploded view of the swirl component in the present invention.

[0054] Figure 18 This is a top view of the upper plate of the swirl component in the present invention.

[0055] Figure 19 It is a top view of the lower plate of the swirl component in the present invention.

[0056] Figure 20 It is a three-dimensional diagram of the dust collection component in the present invention.

[0057] Figure 21 It is a top view of the dust collecting assembly in the present invention. DETAILED DESCRIPTION

[0058] In order to better understand the purpose, structure and function of the present invention, the air pre-purification device with automatic dust removal of the present invention is described in detail below with reference to the accompanying drawings.

[0059] like Figures 1 to 21 As shown, the air pre-purification device with automatic dust discharge of the present invention includes a cyclone component 10, a confluence component 20, a dust collecting component 30, an air outlet pipe 90 and an automatic dust discharge device. The confluence component 20 is located at the upper part of the cyclone component 10 and is connected to the air outlet end 13 of the cyclone component 10. The dust collecting component 30 is located at the lower part of the cyclone component 10 and is connected to the dust outlet end 14 of the cyclone component 10. The automatic dust discharge device is located below the dust collecting component 30 and is connected to the dust discharge port 31 of the dust collecting component 30. The air outlet pipe 90 is arranged to penetrate the cyclone component 10 in the vertical direction. The upper end of the air outlet pipe 90 is connected to the confluence component 20. The lower end of the air outlet pipe 90 passes through the dust collecting component 30 and is connected to the air intake of the engine.

[0060] As a result, air containing dust and impurities enters the cyclone assembly 10 and undergoes cyclonic motion. Impurity particles spiral downward and fall into the dust collecting assembly 30 through the dust outlet 14 of the cyclone assembly 10. The dust collecting assembly 30 is a funnel-shaped structure with at least one dust discharge port 31 formed at the bottom. The automatic dust discharge device is detachably connected to the dust discharge port and maintains a high degree of sealing. The dust in the dust collecting assembly 30 is automatically discharged downward through the control system. The purified air spirals upward, enters the confluence assembly 20 through the air outlet 13 of the cyclone assembly 10, and then flows to the engine through the air outlet pipe 90. The cyclone assembly 10 preferably includes multiple cyclone tubes 17 arranged side by side. The more cyclone tubes 17 there are, the greater the air intake of the air pre-purification device and the higher the purification efficiency.

[0061] Furthermore, the automatic ash discharge device of the present invention includes an ash discharge valve body assembly 100 and an ash discharge control assembly 200. The ash discharge valve body assembly 100 is installed at the ash discharge port 31 at the bottom of the dust collecting assembly 30. The ash discharge control assembly 200 is connected to the ash discharge valve body assembly 100 to control the opening and closing of the ash discharge valve body assembly 100, wherein a first path for dust movement and at least one second path for gas movement are formed in the ash discharge valve body assembly 100. The first path and the second path are connected at the confluence point below the ash discharge valve body assembly 100 and continue downward. When the ash discharge control assembly 200 introduces pressurized gas into the ash discharge valve body assembly 100, that is, when the ash discharge valve body assembly 100 is started, the gas moves along the second path and then sprays out from the bottom of the ash discharge valve body assembly 100, thereby guiding the dust in the ash discharge valve body assembly 100 to be discharged downward along the first path.

[0062] When the air pre-purification device is working, the dust in the cyclone assembly will continue to fall into the dust collecting assembly 30 and gather at the ash discharge port 31 at the bottom. It can be understood that the air pre-purification device is connected to the engine. Since the engine will vibrate when it is working, the air pre-purification device will vibrate. The dust accumulated at the ash discharge port will fall further downward due to the vibration. A self-sealing ash discharge nozzle is set at the bottom of the ash discharge valve body assembly 100. When the ash discharge control assembly 200 is in the closed state, the bottom of the ash discharge nozzle is closed and all the dust is sealed in the ash discharge valve body assembly 100. When the ash discharge control assembly 200 is opened, gas is introduced into the ash discharge valve body assembly 100 along the second path, forming a downward airflow along the second path to open the ash discharge nozzle at the bottom, and discharge the dust accumulated near the ash discharge nozzle downward. At the same time, the second path and the first path form a negative pressure environment in the area below the confluence point to suck down and discharge the dust accumulated at the ash discharge port at the bottom of the dust collecting assembly 30.

[0063] The ash discharge nozzle can be a normally closed elastic ash nozzle made of rubber, or a structure that can automatically reset to achieve sealing, such as a cover plate connected to a spring. At this time, when the automatic ash discharge device is started, the ash discharge nozzle can be blown open by the downward airflow formed by the movement of gas. When the automatic ash discharge device is closed, the ash discharge nozzle can be closed by automatically resetting or restoring its shape.

[0064] In addition to the preferred embodiment described above, the ash discharge nozzle can also adopt a conventional sealing structure, with the opening and closing of the ash discharge nozzle controlled instantly by a control device. In this case, the ash discharge nozzle needs to be controlled to open when the automatic ash discharge device is activated to achieve automatic ash discharge, and to be controlled to close when the automatic ash discharge device stops working. Compared with the preferred embodiment described above, this arrangement is more complex in terms of device structure and control method, but it is more conducive to ensuring the sealing of the ash discharge nozzle when closed.

[0065] Specifically, such as Figure 2 As shown, in the present invention, the straight line in the longitudinal vertical direction is defined as the first axis, and the ash discharge valve body assembly is arranged in a ring with the first axis 101 as the rotation axis, and its external overall structure is a funnel shape that is wide at the top and narrow at the bottom, the surface close to the first axis is the inner side, and the surface away from the first axis is the outer side. A hollow channel is set from top to bottom in the ash discharge valve body assembly along the first axis. When the ash discharge control assembly is closed, dust accumulates in the channel. The channel is the first path. A chamber for gas flow is set around the channel of the ash discharge valve body assembly, and the chamber is connected to the inside of the channel. When the ash discharge valve body assembly is opened, the gas can be sprayed into the channel through the chamber, and then the gas continues to spray downward from the ash discharge nozzle after passing the confluence point. This is the second path for gas movement.

[0066] The first path includes a connection area, a dust collection area, and a dust discharge area, which are sequentially connected from top to bottom. The connection area is connected to the dust collection assembly to allow dust within the dust collection assembly to enter the first path. The dust collection area is located in the middle area of ​​the dust discharge valve body assembly. The dust collection area has an inclined surface, which creates a funnel-shaped structure with a wide top and narrow bottom. The wide top allows the dust collection area to accommodate more dust, while the narrow bottom cooperates with the wide top to form an inclined surface, allowing dust to slide down along the inclined surface, thereby increasing the total amount and speed of dust discharged per unit time and improving dust discharge efficiency.

[0067] The second path includes a gas gathering area, an air outlet, and a gas discharge area that are connected in sequence from top to bottom. The gas in the gas gathering area can flow to the gas discharge area through the air outlet and increase the gas flow rate. The gas gathering area is arranged around the outside of the slope of the dust gathering area and is extended obliquely along the inclination direction of the slope, so that the gas gathering area as a whole has a funnel-shaped structure that is wide at the top and narrow at the bottom, thereby shortening the movement path of the gas in the gas gathering area, reducing the gas pressure loss, and helping to save gas flow.

[0068] The dust discharge area on the first path and the gas discharge area on the second path intersect with each other. The gas moves along the second path to the gas discharge area, which can form a negative pressure environment in the dust discharge area to promote the discharge of dust along the first path. The intersecting dust discharge area and gas discharge area are located below the dust accumulation area and the gas collection area, so that the negative pressure environment generated after the intersection is also below the dust accumulation area. By means of the dust's own gravity and the slope of the dust accumulation area, the dust is attracted downward from the dust accumulation area and discharged, thereby achieving the effect of increasing the dust discharge speed.

[0069] Among them, the bottom of the slope of the dust gathering area extends toward the transition area between the gas collection area and the gas discharge area, so that the bottom of the slope is set close to the gas discharge area, thereby shortening the distance between the dust gathering area and the gas discharge area, avoiding the gas pressure attenuation caused by the increase in the gas movement distance, and weakening the suction of the negative pressure environment on the dust in the dust gathering area, while saving the gas flow and increasing the dust discharge efficiency.

[0070] Furthermore, the lower end of the inclined surface of the dust collection area is connected to a vertical sidewall extending in the vertical direction. The vertical sidewall can form a tubular channel below the inclined surface. This vertical sidewall is closer to the confluence of the dust discharge area and the gas discharge area, which helps the dust contained therein to be discharged downward more quickly, and also avoids forming an obstruction to the dust above it, thereby improving the efficiency of the downward discharge of dust above the tubular channel after the dust discharge control component is opened. It can be understood that the "vertical" here includes both an absolutely vertical setting and a setting close to vertical, both of which can achieve the above-mentioned effects.

[0071] An ash discharge nozzle is provided below the dust discharge area and the gas discharge area. The ash discharge nozzle is normally closed to maintain a negative pressure environment in the dust collecting assembly upstream of the first path. When the gas moves along the second path, the ash discharge nozzle opens to discharge the gas and forms a negative pressure environment in the dust discharge area, thereby promoting the discharge of dust in the first path from the ash discharge nozzle.

[0072] Furthermore, a guide structure is provided in the gas discharge area, and the guide structure is inclined toward the ash discharge outlet of the dust discharge area to guide the gas flowing out of the gas gathering area to move toward the location of the ash discharge outlet, and also form a large impact force around the mouth of the ash discharge nozzle, thereby increasing the opening range of the ash discharge nozzle and making it easier to maintain the open state, thereby improving the ash discharge efficiency.

[0073] The ash discharge valve body assembly is set according to the areas and functions within the above-mentioned first path and second path. The ash discharge valve body assembly includes a shell and a valve core. The shell includes a detachably connected valve body outer cover and an adapter. One end of the adapter is connected to the dust collecting assembly, and the other end is abutted against the upper end of the valve core, and the lower end of the valve core is abutted against the abutment on the valve body outer cover. Of course, one end of the valve body outer cover can also be connected to the dust collecting assembly, the upper end of the valve core is abutted against the abutment on the valve body outer cover, and the lower end of the valve core is abutted against the adapter. As long as the dust collecting assembly, the valve body outer cover and the valve core can be connected up and down and the caliber conversion is adapted, it can enhance the adaptability of the automatic ash discharge device, make it easy to disassemble and maintain, and ensure its sealing.

[0074] The housing is provided with an air inlet hole connected to the gas collection area, and the air outlet of the gas collection area is connected to the dust discharge area on the first path, so that the gas discharge area and the dust discharge area intersect with each other. The air outlet of the gas collection area includes an integrally formed air duct that penetrates the valve core, one end of the air duct connects to the gas collection area, and the other end connects to the dust discharge area and the gas discharge area. The configuration of the integrally formed air outlet makes the air duct have a stable structure, which is not easily deformed under the impact of the high-pressure gas in the gas collection area, can make the air duct have good sealing properties, and helps to maintain the gas pressure in the second path. Furthermore, under the unit gas volume, the air outlet enables the automatic dust discharge device to have a longer jet time, which is equivalent to saving gas in the air pump and increasing the working efficiency of dust discharge.

[0075] The valve core is located in the outer cover of the valve body, and a hollow channel is formed in the middle of the valve core that passes through from top to bottom. The two ends of the valve core are respectively sealed and connected to the adapter and the abutment on the valve body cover to fix the valve core in the outer cover of the valve body. The first path passes through the hollow channel of the valve core, and the gas collection area on the second path is formed between the valve core and the shell. The shell and the valve core are detachable split structures. The valve core and the shell are connected by two groups of sealing components, and the gas collection area is formed between the two groups of sealing components. The above arrangement enhances the stability and sealing of the gas collection area on the one hand, and on the other hand, the valve core can be disassembled from the top or bottom to maintain and clean the inside of the gas collection area. In order to better understand the purpose, structure and function of the present invention, the automatic ash discharge device of the present invention will be further described in detail below with reference to the accompanying drawings, taking the specific structure of the automatic ash discharge device as an example.

[0076] In the embodiment 1 of the automatic ash discharge device of the present invention, the dust collecting component is a funnel-shaped structure, and an ash discharge port is formed at the bottom. The automatic ash discharge device includes an ash discharge valve body component and an ash discharge control component. The ash discharge valve body component is arranged at the ash discharge port at the bottom of the dust collecting component. The ash discharge control component is connected to the ash discharge valve body component to control the opening and closing of the ash discharge valve body component. Figure 3 and Figure 4 As shown, the ash discharge valve body assembly includes a first adapter 110, a valve body outer cover 120, a valve core 130 and an ash discharge nozzle 140. The upper part of the valve body outer cover 120 is connected to the ash discharge port of the dust collecting assembly through the first adapter 110, and the lower part of the valve body outer cover 120 is connected to the ash discharge nozzle 140. The valve core 130 is fixedly arranged in the valve body outer cover 120 through the mutual cooperation of the first adapter 110 and the valve body outer cover 120. A channel is formed in the middle of the ash discharge valve body assembly that runs through the valve body outer cover 120 and the valve core 130 from top to bottom. The top of the channel is connected to the ash discharge port, and the bottom is connected to the ash discharge nozzle 140. The channel is surrounded by the first adapter 110, the valve core 130, the valve body outer cover 120 and the inner side wall of the ash discharge nozzle 140 from top to bottom to form a first path for dust to be discharged downward. When the ash discharge nozzle 140 is opened, dust is discharged downward along the channel in the middle of the ash discharge valve body assembly.

[0077] Specifically, such as Figure 4 and Figure 5As shown, the first adapter 110 is a hollow annular structure as a whole, and the first adapter 110 includes a first side wall 111 and a second side wall 112 in the shape of an annulus, and the annular diameter of the first side wall 111 is larger than the annular diameter of the second side wall 112, and the bottom of the first side wall 111 and the top of the second side wall 112 are connected by an annular first connecting member 113, and then a first threaded structure is provided on the inner side of the first side wall 111, which is screwed with the second threaded structure at the bottom of the outer wall of the ash discharge port, and a third threaded structure is provided on the outer side of the second side wall 112, which is screwed with the fourth threaded structure located on the inner side of the upper part of the valve body outer cover 120, thereby converting the caliber of the bottom of the ash discharge port and the upper part of the valve body outer cover 120, so that the valve body outer cover 120 and the ash discharge port are adapted and sealed.

[0078] It is understandable that the first side wall 111 and the second side wall 112 have different diameters, or the diameter of the first side wall 111 can be smaller than the diameter of the second side wall 112, as long as the upper and lower connections and the caliber conversion adaptation can be achieved. Furthermore, an annular first flange 114 is provided on the inner side of the first connecting member 113 in the first adapter 110. When the outer side of the ash discharge port is connected to the first side wall 111 of the first adapter 110, the first flange 114 corresponds to the inner side of the ash discharge port, thereby forming an annular first groove with an upward opening together with the first connecting member 113 and the first side wall 111. A sealing ring can be provided in the first groove, and then the bottom of the ash discharge port is placed in the first groove to enhance the sealing between the ash discharge port and the first adapter 110, facilitate accurate connection of the ash discharge port and the first adapter 110, and maintain the stability of the two after connection, avoiding the risk of loose connection due to vibration. The first side wall 111 , the second side wall 112 , the first connecting member 113 and the first flange 114 of the first adapter 110 are configured as an integrally formed structure to enhance the overall stability and sealing of the first adapter 110 and facilitate production, processing and assembly.

[0079] It can be understood that when the first side wall 111 of the first adapter 110 is connected to the ash discharge port through the outer side of the wall, the first connecting member 113 will extend toward the outside. At this time, the first flange 114 can also be set on the outside of the first connecting member 113 to form a first groove to achieve stable connection, improve sealing and other effects.

[0080] In addition, the bottom of the second side wall 112 of the first adapter 110 abuts against the top surface of the valve core 130, so that the valve core 130 is fixedly set in the valve body outer cover 120. It can be understood that those skilled in the art can adjust the diameter size of the cross section of the first side wall 111 in the first adapter 110 according to the actual size of the ash discharge port so that it is compatible with the valve body outer cover 120 without changing the structure of the original ash discharge port. That is, the automatic ash discharge device of the present invention is suitable for pre-filters with ash discharge ports of various structural sizes, and has the advantages of high adaptability and quick and convenient installation. At the same time, when it is necessary to temporarily remove the automatic ash discharge device, since the structural setting of the original ash discharge port is retained, the original cover of the ash discharge port can also be used to seal the ash discharge port to maintain its internal negative pressure environment, so that the pre-filter continues to maintain a working state, which has the beneficial effect of improving actual production work efficiency.

[0081] Of course, the first adapter 110 can also be integrally formed with the ash discharge port, or the ash discharge port can be directly connected to the valve body outer cover 120 by adapting the diameter thereof, as long as the valve core 130 can be fixedly arranged in the valve body outer cover 120. The above structures and connection methods are all choices and improvements that can be made by technical personnel in this field according to actual conditions without the need for creative labor.

[0082] like Figure 4 and Figure 6 As shown, the valve body outer cover 120 is a hollow funnel-shaped structure with a larger top and a smaller bottom. Annular side walls with gradually decreasing diameters are arranged from top to bottom, and a chamber that passes through from top to bottom is formed in the middle. The valve core 130 is placed in the chamber, and an air cavity 150 is formed between the valve body outer cover 120 and the valve core 130. An air inlet 151 is provided on the side wall of the valve body outer cover 120 that is laterally opposite to the air cavity 150. The ash discharge control component is connected to the air inlet 151 through a pipeline, and then gas is filled into the air cavity 150 from the side wall of the valve body outer cover 120, and then discharged downward through the air channels 131 provided at the bottom of the valve core 130. The gas is ejected downward in a rapid jet-like manner to blow open the ash discharge nozzle 140, and at the same time, negative pressure is generated in the hollow channel of the bottom side wall of the valve core 130 to suck the dust gathered at the ash discharge port into the channel and discharge it through the ash discharge nozzle 140.

[0083] Specifically, the valve body outer cover 120 is provided with a circular third side wall 121, a fourth side wall 122, a fifth side wall 123 and a sixth side wall 124 from top to bottom, wherein the third side wall 121 is vertically arranged, and a fourth threaded structure is provided on the inner side of the third side wall 121, and the fourth threaded structure is correspondingly connected to the third threaded structure of the first adapter 110, so that the valve body outer cover 120 is connected to the ash discharge port.

[0084] The fourth side wall 122 of the valve body outer cover 120 is vertically arranged, and the radius of the fourth side wall 122 is smaller than the radius of the third side wall 121. The two ends of the second connecting member 125 are respectively connected to the bottom of the third side wall 121 and the top of the fourth side wall 122, thereby forming an annular first boss between the third side wall 121 and the fourth side wall 122. The first boss abuts against the flange structure at the top of the valve core 130, so that the valve body outer cover 120 supports the valve core 130 upward.

[0085] At the same time, the bottom of the second side wall 112 of the above-mentioned first adapter 110 is abutted against the top of the valve core 130, and the second side wall 112 exerts downward pressure on the valve core 130, thereby the bottom of the second side wall 112, the inner side of the third side wall 121, and the first boss together enclose an annular second groove opening inward, and a sealing ring can be set in the second groove. The top of the valve core 130 is set in the second groove, so that the valve core 130 is in a fixed state in the valve body outer cover 120, and after the threaded structure of the second side wall 112 and the third side wall 121 are screwed together, the sealing between the top of the valve core 130 and the valve body outer cover 120 is improved by increasing the longitudinal clamping force of the second groove structure.

[0086] It is understood that the aforementioned arrangement of the fourth sidewall 122 with a radius smaller than that of the third sidewall 121 to form the first boss not only facilitates the production and processing of the valve body outer cover 120, but also helps to strengthen the structural strength of the first boss, thereby enhancing the contact force between the valve core 130 and the first boss and improving the sealing performance. In addition to the above preferred arrangement, the fourth sidewall 122 and the third sidewall 121 can also be configured as a continuous sidewall structure with the same diameter, with the first boss protruding from the inner diameter of the fourth sidewall 122 or the third sidewall 121 to form a second groove for securing the valve core 130.

[0087] The fifth side wall 123 of the valve body outer cover 120 is set at an angle, and the inner side of the fifth side wall 123 gradually approaches the first axis from top to bottom, that is, the channel in the fifth side wall 123 has a funnel-shaped structure, so as to correspond to the side wall of the funnel-shaped valve core 130 structure accommodated inside, thereby forming a path for the gas to flow toward the bottom thereof in the direction close to the first axis in the air cavity 150, and then guiding the gas in the air cavity 150 to converge at the upper port of the air channel 131 at the bottom.

[0088] The sixth side wall 124 of the valve body outer cover 120 is vertically arranged and connected to the bottom of the fifth side wall 123. The sixth side wall 124 is locked with the upper part of the ash discharge nozzle 140 by a clamp structure to form a closed structure. In addition, a transversely arranged annular second connecting member 126 is provided on the inner side of the sixth side wall 124. The outer ring end of the second connecting member 126 is connected to the middle area of ​​the inner side of the sixth side wall 124, and the inner ring end of the second connecting member 126 is connected to the top of the guide wall, thereby forming an annular second boss in the sixth side wall 124, and the second boss abuts against the bottom of the valve core 130. , so that the valve body outer cover 120 further supports the valve core 130 upward. At the same time, the second boss cooperates with the above-mentioned second groove. By increasing the longitudinal clamping force of the second groove structure, the second boss moves upward, further increasing the upward pressure of the second boss on the valve core 130, that is, the bottom of the second side wall 112 of the first adapter 110 and the second boss clamp the valve core 130 in the longitudinal direction, thereby increasing the sealing between the bottom of the valve core 130 and the valve body outer cover 120, and also making the overall structure of the valve core 130 stably fixed in the valve body outer cover 120.

[0089] Furthermore, the guide wall within the sixth side wall 124 is funnel-shaped as a whole, and the lower end of the guide wall corresponds to the position of the mouth 145 in the middle of the ash discharge nozzle 140, so as to guide the gas ejected from the air cavity 150 and make the gas blow toward the mouth 145 of the ash discharge nozzle 140 along the inclined inner wall of the guide wall.

[0090] Preferably, the guide wall includes a funnel-shaped seventh sidewall 127 and an eighth sidewall 128 extending vertically downward from the bottom of the seventh sidewall 127. The diameter of the cross-section at the top of the seventh sidewall 127 is greater than the diameter of the circular ring containing the lower end of the air channel 131 at the bottom of the valve core 130. That is, the seventh sidewall 127 is disposed on the periphery of the air channel 131 of the valve core 130 to guide the path of the gas ejected from each air channel 131, prevent the gas from diffusing away from the first axis, and guide the gas ejected from each air channel 131 to converge at the mouth 145 of the ash discharge nozzle 140, concentrating its maximum injection pressure at the mouth 145 of the ash discharge nozzle 140, thereby increasing the opening speed of the ash discharge nozzle 140 and reducing the gas pressure threshold for opening the ash discharge nozzle 140, thereby improving the efficiency and quality of ash discharge. The extension line of the seventh sidewall 127 forms a fourth angle with the first axis, and the fourth angle is 15 to 45 degrees.

[0091] Among them, the eighth side wall 128 is vertically arranged at the bottom of the seventh side wall 127, and the longitudinal height of the eighth side wall 128 is smaller than the longitudinal height of the seventh side wall 127, so as to guide the gas ejected from each air duct 131 vertically downward at the end of the guide wall, and also form a large impact force around the mouth 145 of the ash discharge nozzle 140, thereby increasing the opening range of the ash discharge nozzle 140 and making it easier to maintain the open state, thereby improving the ash discharge efficiency.

[0092] Furthermore, an annular second flange 129 is provided in the middle area outside the sixth side wall 124 of the valve body outer cover 120, and a plurality of reinforcing ribs are provided outside the fifth side wall 123 of the valve body outer cover 120. The reinforcing ribs are perpendicular to the fifth side wall 123 and arranged in a ring around it, and the bottom of the reinforcing ribs abuts against the upper surface of the second flange 129 of the sixth side wall 124 to disperse the pressure received in the fifth side wall 123 toward the sixth side wall 124 below, and the second flange 129 can also form an upward supporting force on the fifth side wall 123. In addition, after the side wall of the ash discharge nozzle 140 is tightly connected to the sixth side wall 124, the top of the side wall of the ash discharge nozzle 140 abuts against the lower surface of the second flange 129. Therefore, the pressure received by the reinforcing rib can also be decomposed to the ash discharge nozzle 140 through the second flange 129, thereby avoiding stress concentration on the fifth side wall 123, thereby enhancing the stability of the valve body outer cover 120 structure.

[0093] like Figure 7 and Figure 8 As shown, the valve core 130 as a whole is a funnel-shaped structure that is wide at the top and narrow at the bottom, thereby forming a larger accommodating space above the valve core 130 for accumulating dust. The bottom of the valve core 130 is narrowed to make it easy to install the valve core 130 in the valve body outer cover 120. At the same time, the inclined side walls formed by the funnel-shaped structure guide the path of dust as it moves downward, so that the dust flows downward smoothly in sequence.

[0094] Preferably, the valve core 130 is wider at the top and narrower at the bottom. The upper part is a funnel-shaped structure with inclined side walls to form a larger accommodating space for dust accumulation. At the same time, the inclined side walls help the dust to be discharged smoothly downward. The lower part is narrowed to form a vertical columnar structure. Due to the negative pressure environment close to the confluence point below, the dust here is subjected to greater suction when discharged. The above-mentioned vertical structure is more conducive to the rapid discharge of dust downward, avoiding dust blockage here, and improving the efficiency of dust discharge. Specifically, it includes an inverted conical ninth side wall 132 and a vertical arrangement at the bottom of the ninth side wall 132. The tenth side wall 133 has an air duct 131 at the bottom thereof, the upper end of the air duct 131 is connected to the air cavity 150, and the lower end of the air duct 131 is connected to the third chamber in the seventh side wall 127. Since a hollow passage running through the upper and lower parts is formed in the middle of the valve core 130, dust accumulates inside the valve core 130 when the dust discharge control component is closed. After the dust discharge control component is opened, the air duct 131 at the bottom of the valve core 130 sprays gas downward to blow open the dust discharge nozzle 140, thereby forming a negative pressure area below the valve core 130, so that the dust in the valve core 130 is quickly discharged downward.

[0095] Specifically, the ninth side wall 132 surrounds the first axis to form a first chamber that is continuous from top to bottom, and the tenth side wall 133 surrounds the first axis to form a second chamber that is continuous from top to bottom. The longitudinal height of the first chamber is greater than the longitudinal height of the second chamber. Since the first chamber as a whole has a larger volume, it is understandable that when the ash discharge nozzle 140 is blown open and a negative pressure environment is formed below the valve core 130, the dust in the ash discharge valve body assembly that is close to the negative pressure environment and perpendicular to the negative pressure environment will be preferentially discharged downward. The first chamber is located in this preferential downward discharge position, so increasing the volume of the first chamber is conducive to maximizing the total amount of dust discharged per unit time.

[0096] Furthermore, the cross-sectional diameter of the top of the first chamber is larger than the cross-sectional diameter of the bottom thereof. While maximizing the volume of the first chamber, the inclined ninth side wall 132 guides the path of dust as it moves downward, thereby allowing the dust to flow downward smoothly and sequentially, facilitating the dust to be discharged downward along the inclined side wall. At the same time, the tenth side wall 133 of the second chamber is arranged longitudinally parallel to the first axis, that is, the tenth side wall 133 is vertically downward. When the air duct 131 below the tenth side wall 133 ejects gas, the negative pressure applied to the second chamber is maximized. The second chamber is vertically downward to promote the more rapid downward discharge of the dust contained therein, while also avoiding obstruction of the dust above it, thereby improving the efficiency of the downward discharge of dust above the second chamber after the dust discharge control component is turned on.

[0097] Preferably, the extension line of the ninth side wall 132 of the first chamber forms a third angle with the first axis, and the third angle is 25 to 60 degrees. In the present embodiment, it is set to 35 degrees. Under the premise that the dust above the first chamber is efficiently discharged after the dust discharge control component is turned on, the dust holding capacity in the area above the first chamber to the dust discharge port is maximized to increase the total amount of dust discharged per unit time.

[0098] It can be understood that in this embodiment, the valve core 130 is fixed by abutting against the first adapter 110 and the valve body outer cover 120, and those skilled in the art can abut the valve core 130 with the first adapter 110 and at least one structure in the valve body outer cover 120 according to actual conditions, as long as the valve core 130 can be fixed in the ash discharge valve body assembly.

[0099] In addition, the outer side of the valve core 130 forms the inner wall of the air cavity 150 structure, and the valve core 130 and the valve body outer cover 120 are detachably connected, so that the user can clean or maintain the inside of the air cavity 150 according to the actual working conditions of the automatic ash removal device to improve the working efficiency of the automatic ash removal device.

[0100] Specifically, such as Figure 9As shown, the ninth side wall 132 is opposite to the upper area of ​​the fourth side wall 122 and the fifth side wall 123 of the valve body outer cover 120, and the tenth side wall 133 is opposite to the lower area of ​​the fifth side wall 123 of the valve body outer cover 120, thereby forming an annular inverted cone-shaped air cavity 150 with a cross-section approximately parallelogram-shaped. The ninth side wall 132 of the valve core 130 and the fourth side wall 122 of the valve body outer cover 120 form a first angle 152 at the connection between the ninth side wall 132 of the valve core 130 and the fourth side wall 122 of the valve body outer cover 120, and the tenth side wall 133 of the valve core 130 and the fifth side wall 123 of the valve body outer cover 120 form a second angle 153. The first angle 152 and the second angle 153 are two smaller acute angle structures in the parallelogram cross-section of the air cavity 150, and the air inlet 151 of the air cavity 150 faces the ninth side wall 132.

[0101] An air inlet hole 151 is set in the adjacent area of ​​the fourth side wall 122 and the fifth side wall 123 of the above-mentioned valve body outer cover 120, so that the air inlet hole 151 is inclined relative to the ninth side wall 132 in the valve core 130. It can be understood that after the gas filled from the air inlet hole 151 enters the air cavity 150, it follows the guide path formed on the outside of the ninth side wall 132, and quickly fills the entire air cavity 150 in the horizontal and vertical directions. After moving upward, the gas is limited by the first angle 152, turns at the top of the air cavity 150 and moves downward, thereby exerting downward pressure on the laterally moving airflow, guiding the airflow in the air cavity 150 to move downward as a whole, so as to achieve the effect of making the laterally filled gas move quickly and evenly downward.

[0102] In detail, the above-mentioned structural arrangement allows gas to enter the air cavity 150 laterally from the air inlet hole 151, and diffuse to the left and right sides thereof after contacting the ninth side wall 132, that is, the gas quickly fills the air cavity 150 in the lateral plane of the air inlet hole 151, and then diffuses upward and downward along the inclined wall surface of the ninth side wall 132, so that the pressure pushed to the upper ports of each air channel 131 is balanced. Since the angles of the first angle 152 and the second angle 153 are relatively small, that is, the distances between the valve core 130 at the upper and lower ends of the air cavity 150 and the wall surface of the valve body outer cover 120 are relatively close, the gas stress at the first angle 152 and the second angle 153 is more concentrated, and then the pressure in the air cavity 150 toward the first angle 152 and the second angle 153 increases, which is beneficial to the air tightness of the top flange of the valve core 130 opposite to the first angle 152, and the gas is discharged from the upper port of the air channel 131 corresponding to the second angle 153.

[0103] Furthermore, the distance between the fourth side wall 122 and the tenth side wall 133 is greater than the cross-sectional diameter of the air inlet hole 151, so as to increase the cross-sectional area of ​​the air cavity 150, thereby making the air cavity 150 have a larger volume. It can be understood that the gas entering the air cavity 150 through the air inlet hole 151 has a relatively high pressure. Setting a side wall spacing greater than the diameter of the air inlet hole 151 along the air flow direction of the air inlet hole 151 is conducive to the release of gas pressure, increasing the volume of the air cavity 150 and the inner wall surface area, thereby reducing the pressure of the gas filled in from the air inlet hole 151, especially when the ash discharge control component is just turned on, the gas pressure reaches a peak, generally more than 8 kilograms. Such a large gas pressure fills the air cavity 150 with a short lateral side wall distance and a small volume in a very short time, which is easy to impact the structure of the air cavity 150 and cause the air cavity 150 to crack. The above-mentioned setting can ensure the safety and durability of the structure of the air cavity 150.

[0104] Preferably, an air passage 131 is provided in the valve core 130, and the air passage 131 is connected to the air cavity 150. After the ash discharge control component is turned on, the air pump continuously fills the air cavity 150 with gas, and the gas is squeezed and compressed through the air passage 131 and then ejected downward. Therefore, the outer wall of the air passage 131 is an integrally formed structure, that is, the air passage 131 is provided inside the integrally formed valve core 130 structure, so that the air passage 131 has a stable structure, so that it is not easy to deform under the impact of high-pressure gas, that is, the air passage 131 can have good airtightness, which helps to maintain the gas pressure in the second path, and further, under unit gas capacity, the air passage 131 structure enables the automatic ash discharge device to have a longer jet time, which is equivalent to saving gas in the air pump and increasing the working efficiency of ash discharge.

[0105] Furthermore, the air duct 131 is arranged longitudinally and has an inclined angle. The air duct 131 includes an upper port and a lower port. The upper port is arranged on the outside of the tenth side wall 133, and the lower port is arranged at the bottom of the tenth side wall 133, that is, the air duct 131 gradually approaches the first axis of the hollow channel of the valve core 130 along the direction from the upper port to the lower port. Therefore, after the air flow is guided and discharged through the paths of each air duct 131, it is guided toward the first axis through the seventh side wall 127 of the valve body outer cover 120, so that the gas discharged from each air duct 131 converges to form a downward concentrated pressure. The convergence point is located at the mouth 145 of the ash discharge nozzle 140, so that the pressure of the air flow reaches the maximum value at the mouth 145, and then the mouth 145 is opened to the maximum size, and the negative pressure formed above it is also greater, thereby improving the efficiency of ash discharge.

[0106] It can be understood that if the convergence point is above the nozzle 145, the air flows will cross and converge and arrive at the nozzle 145 in a turbulent state in different directions, so the air flow cannot achieve the maximum downward pressure, and the nozzle 145 may not be blown open or the opening range of the nozzle 145 is insufficient. If the convergence point is below the nozzle 145, the gas of each airway 131 acts separately on the side wall above the nozzle 145, and there is also a situation where the nozzle 145 may not be blown open or the opening range of the nozzle 145 is insufficient.

[0107] Preferably, the extension line of the air duct 131 forms a fifth angle with the first axis, and the fifth angle is 15 degrees to 45 degrees, so that the gas ejected from the air duct 131 is gathered near the mouth 145 of the ash discharge nozzle 140, avoiding the rapid decay of gas pressure before driving the mouth 145 of the ash discharge nozzle 140 to open.

[0108] Preferably, the air channel 131 is disposed at the bottom of the valve core 130 to shorten the distance between the lower end of the air channel 131 and the ash discharge nozzle 140. This reduces the height of the junction of the first and second paths, thereby overcoming the attenuation of the pressure of the gas ejected from the lower end of the air channel 131 over a shorter distance, thereby conserving air in the air pump and enhancing ash discharge efficiency. Simultaneously, the bottom of the valve core 130 forms the aforementioned second angle 153 through its sidewalls. This creates a higher gas pressure there than at other locations through stress concentration, further pressurizing the gas entering the air channel 131 and helping to conserve gas within the air pump.

[0109] Furthermore, the upper port of the airway 131 is directly connected to the air cavity 150, so that the gas in the air cavity 150 is pressurized at the second angle 153 and directly enters the airway 131 to avoid the attenuation of the gas pressure caused by the increase of the transmission path. Preferably, the length of the airway 131 is 2mm to 7mm, and the diameter of the airway 131 is 0.5mm to 2mm. The length and diameter of the airway 131 can further increase the pressure of the gas discharged from the air cavity 150, and at the same time, the pressure decrease after the pressure is transmitted through the airway 131 is minimized, so as to improve the utilization efficiency of the gas in the air pump.

[0110] Preferably, the air ducts 131 are arranged at equal intervals at the bottom of the valve core 130 and are symmetrically arranged with the first axis as the rotation axis, so that the gas ejected from the lower port of the air duct 131 forms an equal interaction force at the first axis position, and then the converged gas moves vertically downward along the first axis, so that its injection angle is directly opposite to the ash discharge nozzle 140, thereby maximizing the airflow pressure and improving the ash discharge efficiency.

[0111] It can be understood that at least one air channel 131 is provided to allow the gas in the air cavity 150 to pass into the first path. Preferably, the number of air channels 131 is 4 to 16 and they are arranged at equal intervals. In this embodiment, there are 8 air channels, which can achieve a higher gas injection pressure with a smaller number of air channels 131, thereby saving air pump gas and ensuring ash removal efficiency.

[0112] The diameter of the top of the ninth side wall 132 is comparable to the diameter of the second side wall 112 of the valve body outer cover 120, that is, the diameter of the ash discharge port is comparable to the diameter of the ninth side wall 132, and the cross-sectional shape of the top of the ninth side wall 132 is the same as the cross-sectional shape of the second side wall 112 of the valve body outer cover 120, so that the dust falling into the ash discharge port continues to fall along the ninth side wall 132, avoiding it from gathering at the ash discharge port, thereby increasing the total amount of dust contained in the valve core 130 when the ash discharge control component is closed, thereby improving the ash discharge efficiency.

[0113] An annular third flange 134 is provided at the top of the ninth side wall 132 in the transverse outward direction, and the third flange 134 is accommodated in an annular second groove enclosed by the bottom of the second side wall 112, the inner side of the third side wall 121 and the first boss, and the inner wall of the second groove abuts the lower surface of the third flange 134. In addition, an annular fourth flange 135 is provided at the outer edge of the top of the ninth side wall 132 in the longitudinal upward direction, and the upper surface of the fourth flange 135 abuts the inner wall of the second groove, thereby making the upper and lower surfaces of the outer edge of the top of the ninth side wall 132 abut against the inner wall of the second groove, thereby limiting the valve core 130 through the locking structure of the valve body outer cover 120 and the first adapter 110, so that it is tightly fixed and accommodated in the valve body outer cover 120, thereby improving the air tightness of the air cavity 150 enclosed by the valve body outer cover 120 and the valve core 130.

[0114] The upper surface of the third flange 134 is connected to the outer side of the fourth flange 135, thereby forming an annular first sealing groove together with the bottom of the second side wall 112 and the inner side of the third side wall 121. An elastic first sealing ring can be provided in the first sealing groove to further enhance the air tightness of the connection between the top of the valve core 130 and the valve body outer cover 120.

[0115] An annular fifth flange 136 is provided on the outer side of the bottom of the tenth side wall 133 in the laterally outward direction, and the outer side of the fifth flange 136 abuts against the inner side of the sixth side wall 124 of the valve body outer cover 120. At the same time, since the bottom of the tenth side wall 133 abuts against the second boss, the tenth side wall 133, the fifth flange 136, the sixth side wall 124 and the second connecting piece 126 together form an annular second sealing groove, and an elastic second sealing ring can be provided in the second sealing groove to further enhance the air tightness of the connection between the top of the valve core 130 and the valve body outer cover 120.

[0116] like Figure 10As shown, the ash discharge nozzle 140 includes an eleventh side wall 141, a twelfth side wall 142, and a nozzle 145. The eleventh side wall 141 is an annular structure and is preferably locked with the sixth side wall 124 via a clamp structure, so that the ash discharge nozzle 140 is tightly connected to the valve body outer cover 120. The twelfth side wall 142 and the nozzle 145 are elastically deformable structures, so that when they are impacted by airflow, they can deform to form a channel for dust discharge. When the airflow stops, they automatically restore their shape to close the channel. In this embodiment, the twelfth side wall 142 and the nozzle 145 are made of EPDM rubber, but can also be made of silicone or other materials as long as they can achieve the effect of elastic deformation. Of course, the ash discharge nozzle 140 can also be connected using structures such as threads and snaps.

[0117] Specifically, the twelfth side wall 142 has an inverted cone-shaped structure as a whole, including two oppositely arranged curved portions 143, and a group of flat portions 144 are relatively connected between the curved portions 143. The bottom edges of the flat portions 144 converge into a line segment, and the nozzle 145 is two sheet-like structures. The top of the nozzle 145 is connected to the bottom edge of the flat portion 144. Since the bottom edges of the two flat portions 144 are closed, the nozzle 145 often remains closed when there is no external force. When an airflow is sprayed from top to bottom toward the nozzle 145, the flat portion 144 of the twelfth side wall 142 expands and the curved portion 143 contracts, thereby causing the nozzle 145 to deform into an approximately circular shape, thereby opening a channel for dust to be discharged downward. After the airflow stops, the nozzle 145 closes to close the dust outlet.

[0118] Among them, the flat portion 144 of the twelfth side wall 142 forms a sixth angle with the first axis. The sixth angle maintains the same angle as the fourth angle and the fifth angle mentioned above, which is 15 degrees to 45 degrees, so that the gas is ejected through the airway 131 along a straight path to the nozzle 145 position, thereby reducing the attenuation rate of the gas pressure.

[0119] Furthermore, the nozzle 145 extends downward along the first axis to form a certain height, increasing the closing area of ​​the nozzle 145, thereby increasing the closing strength of the nozzle 145, and preventing the nozzle 145 from opening when the air pump is not exhausted, affecting the sealing of the dust collecting component of the air pre-purification device. The height of the nozzle 145 is set to 2cm to 5cm.

[0120] It is understandable that the ash discharge nozzle 140 can also be set to other self-sealing movable structures according to actual needs. For example, the nozzle 145 can be set to a spring self-sealing structure, relying on the elastic force of the spring to close the nozzle 145. When the airflow passes through, the air pressure overcomes the spring elastic force to blow open the nozzle 145. After the airflow stops, the spring elastic force resets the nozzle 145. It can also be set to a magnetic self-sealing structure, using a magnet to close the nozzle 145. When the airflow passes, the air pressure overcomes the magnetic force to blow open the nozzle 145. After the airflow stops, the magnetic force resets the nozzle 145. Or other self-sealing movable structures, as long as it can achieve the effect of blowing the nozzle 145 open by air pressure and the nozzle 145 self-closing after the airflow stops.

[0121] In the second embodiment of the automatic ash discharge device of the present invention, the dust collecting assembly is a funnel-type structure, and an ash discharge port is formed at the bottom. Similar to the first embodiment, the automatic ash discharge device includes an ash discharge valve body assembly and an ash discharge control assembly, wherein an ash discharge nozzle 440 and an air duct 423 structure are also provided at the bottom of the ash discharge valve body assembly. Different from the first embodiment, the structure and connection relationship between the ash discharge nozzle 440 and the ash discharge port, as well as the air cavity 450 structure, are described below with emphasis on the differences.

[0122] The ash discharge valve body assembly is set at the ash discharge port at the bottom of the dust collecting assembly. The ash discharge control assembly is connected to the ash discharge valve body assembly to control the opening and closing of the ash discharge valve body assembly. Figure 11 As shown, the ash discharge valve body assembly includes a valve body outer cover 410, a valve core 420, a second adapter 430 and an ash discharge nozzle 440. The upper part of the valve body outer cover 410 is connected to the ash discharge port of the dust collecting assembly, and the lower part of the valve body outer cover 410 is connected to the ash discharge nozzle 440 through the second adapter 430. The valve core 420 is fixedly arranged in the valve body outer cover 410 through the mutual cooperation of the valve body outer cover 410 and the second adapter 430. A channel is formed in the middle of the ash discharge valve body assembly that runs through the valve body outer cover 410 and the valve core 420 from top to bottom. The top of the channel is connected to the ash discharge port, and the bottom is connected to the ash discharge nozzle 440. The channel is surrounded by the inner and outer walls of the valve body outer cover 410, the valve core 420, the second adapter 430 and the ash discharge nozzle 440 from top to bottom to form a first path for dust to be discharged downward. When the ash discharge nozzle 440 is opened, dust is discharged downward along the channel in the middle of the ash discharge valve body assembly.

[0123] Specifically, such as Figure 13 As shown, the valve body outer cover 410 is provided with an annular first outer wall 411, a second outer wall 412 and a third outer wall 413 from top to bottom in sequence. The first outer wall 411 is vertically arranged, and a first threaded structure is arranged on its inner side. The first threaded structure corresponds to the threaded structure on the outer side of the bottom of the ash discharge port. After the threads are screwed together, the ash discharge valve body assembly is sealed with the dust collecting assembly, thereby forming a negative pressure environment in the dust collecting assembly.

[0124] The top of the second outer wall 412 of the valve body outer cover 410 is connected to the first outer wall 411, and the bottom of the second outer wall 412 is connected to the third outer wall 413, and the diameter of the outer wall gradually decreases from top to bottom, so that the second outer wall 412 is funnel-shaped as a whole. When dust falls to the inside of the second outer wall 412, it gradually gathers toward the middle channel of the second outer wall 412 along its inclination angle. Combined with the upward support force provided by the bottom ash discharge nozzle 440 of the outer wall, the dust gathers in the middle channel of the second outer wall 412 and then moves further downward and accumulates, so that the dust forms a relatively stable static state in the first path.

[0125] The third outer wall 413 of the valve body outer cover 410 is vertically arranged downward along the bottom of the second outer wall 412, and a first protrusion 414 is protruded from the top of the third outer wall 413 toward the first axis direction. The first protrusion 414 also protrudes inward from the bottom of the second outer wall 412 so that the top of the valve core 420 abuts against the lower surface of the first protrusion 414, thereby limiting the valve core 420 in the direction of upward movement.

[0126] The inner side of the third outer wall 413 is arranged opposite to the outer side of the valve core 420 and encloses an air cavity 450, and then an air inlet hole 415 is horizontally arranged on the third outer wall 413, and the dust discharge control component is connected to the air inlet hole 415 through a pipeline, and then gas is filled into the air cavity 450 from the outer wall of the valve body outer cover 410, and then discharged downward through the air channels 423 set at the bottom of the valve core 420. The gas is discharged downward in a rapid jet-like manner to blow open the dust discharge nozzle 440, and at the same time, negative pressure is generated in the lower area of ​​the valve core 420 to suck the dust accumulated in the valve core 420 into the channel and discharge it through the dust discharge nozzle 440.

[0127] In addition, a second threaded structure is provided on the inner side of the bottom of the third outer wall 413, and the second threaded structure is screwed together with the second adapter 430. The bottom of the second adapter 430 is connected to the ash discharge nozzle 440, thereby making the valve body outer cover 410 and the ash discharge nozzle 440 airtightly connected, so as to facilitate the rapid formation of a negative pressure environment in the valve core 420 and improve the ash discharge efficiency.

[0128] like Figure 14 As shown, the top of the valve core 420 abuts against the bottom of the second outer wall 412, and the bottom of the valve core 420 abuts against the top of the second adapter 430, so that it is accommodated in the third outer wall 413 of the valve body outer cover 410. The overall structure is a cylindrical hollow structure, and the channel formed by the hollow structure is vertically arranged so that when the dust discharge control component is opened, the dust accumulated at the bottom of the second outer wall 412 can fall quickly from the channel, thereby forming a negative pressure environment in the valve core 420.

[0129] Specifically, the valve core 420 includes a fourth outer wall 421 arranged at the upper part, and a fifth outer wall 422 arranged at the lower part. The outer side of the outer wall of the valve core 420 is opposite to the inner side of the third outer wall 413, wherein the distance between the fourth outer wall 421 and the third outer wall 413 is a first distance, and the distance between the fifth outer wall 422 and the third outer wall 413 is a second distance, and the second distance is greater than the first distance, thereby forming an air cavity 450 structure that is narrow at the top and wide at the bottom, relatively reducing the upper space of the air cavity 450, so that it is first filled with air flow and then guides the path of subsequent air flow downward.

[0130] The air inlet hole 415 on the third outer wall 413 is opposite to the middle area of ​​the valve core 420, and the upper part of the air inlet hole 415 on the third outer wall 413 is opposite to the fourth outer wall 421, and the lower part of the air inlet hole 415 is opposite to the fifth outer wall 422, that is, the upper part of the gas filled in from the air inlet hole 415 corresponds to the fourth outer wall 421, and the lower part of the gas corresponds to the fifth outer wall 422. After passing through the air inlet hole 415, the gas quickly fills the entire air cavity 450 in the horizontal and vertical directions along the guide path formed on the outside of the valve core 420. Since the structure of the air cavity 450 is narrow at the top and wide at the bottom, the upper space is quickly filled, and then the gas turns at the top of the air cavity 450 and moves downward, thereby exerting downward pressure on the laterally moving airflow, guiding the airflow in the air cavity 450 to move downward as a whole, so as to achieve the effect of making the laterally filled gas move quickly and evenly downward.

[0131] It can be understood that in this embodiment, the valve core 420 is fixed by abutting against the second adapter 430 and the valve body outer cover 410. Those skilled in the art can abut the valve core 420 with the second adapter 430 and at least one structure in the valve body outer cover 410 according to actual conditions, as long as the valve core 420 can be fixed in the ash discharge valve body assembly.

[0132] In addition, multiple air channels 423 are equidistantly arranged in the bottom of the valve core 420, the upper end of the air channel 423 is connected to the air cavity 450, and the lower end of the air channel 423 is connected to the middle channel in the outer wall of the adapter. Since a hollow channel running through the upper and lower parts is formed in the middle of the valve core 420, dust accumulates inside the valve core 420 when the dust discharge control component is closed. After the dust discharge control component is opened, the air channel 423 at the bottom of the valve core 420 sprays gas downward to blow open the dust discharge nozzle 440, thereby forming a negative pressure area in the valve core 420, so that the dust above the valve core 420 is quickly discharged downward.

[0133] Preferably, the air duct 423 of the valve core 420 is arranged longitudinally and has an inclined angle, the upper port of the air duct 423 is arranged on the outside of the fifth outer wall 422, and the lower port of the air duct 423 is arranged at the bottom of the fifth outer wall 422, that is, the air duct 423 gradually approaches the first axis along the direction from the upper port to the lower port, and the extension line of the air duct 423 forms a first angle with the first axis, so that the air flow is guided and discharged through each second path, and then guided in the direction of the first axis through the second adapter 430 below, so that the gas discharged from each air duct 423 converges to form a downward concentrated pressure, and the convergence point is located at the mouth of the ash discharge nozzle 440, so that the pressure of the air flow reaches the maximum value at the mouth, and then the mouth is opened to the maximum size, and the negative pressure formed in the valve core 420 is also greater, thereby improving the efficiency of ash discharge.

[0134] It can be understood that if the convergence point is located above the nozzle, the air flows will cross and converge and arrive at the nozzle in a turbulent state in different directions, so the air flow cannot achieve the maximum downward pressure, and the nozzle may not be blown open or the nozzle opening range is insufficient. If the convergence point is located below the nozzle, the gas of each airway 423 acts separately on the outer wall above the nozzle, and there is also a situation where the nozzle may not be blown open or the nozzle opening range is insufficient.

[0135] A second protrusion 424 is provided near the top of the fourth outer wall 421. The second protrusion 424 protrudes outward in a direction away from the first axis and abuts against the inner side of the third outer wall 413 of the valve body outer cover 410. At the same time, a third protrusion 425 is provided near the bottom of the fifth outer wall 422. The third protrusion 425 protrudes outward in a direction away from the first axis and abuts against the inner side of the third outer wall 413 of the valve body outer cover 410. Thus, the second protrusion 424 and the third protrusion 425 respectively constitute the upper top surface and the lower bottom surface of the air cavity 450 structure, and the valve core 420 is tightly fitted with the valve body outer cover 410 structure to form a closed air cavity 450.

[0136] Preferably, the upper surface of the second protrusion 424 is connected to the fourth outer wall 421 to form a concave structure, and an elastic third sealing ring is arranged in the concave, so that the third sealing ring is located in the annular first sealing groove jointly surrounded by the concave structure, the inner side of the third outer wall 413, and the lower surface of the first protrusion 414, and then the second adapter 430 is screwed together with the third outer wall 413 to squeeze the third sealing ring upward to further enhance the air tightness of the connection between the top of the valve core 420 and the outer cover 410 of the valve body.

[0137] In addition, the lower surface of the third protrusion 425 is connected to the fourth outer wall 421 to form another concave structure, and an elastic fourth sealing ring is arranged in the concave, so that the fourth sealing ring is located in the annular second sealing groove jointly surrounded by the concave structure, the inner side of the third outer wall 413, and the upper surface of the adapter. Then, after the second adapter 430 is screwed together with the third outer wall 413, the fourth sealing ring is squeezed upward to further enhance the airtightness of the connection between the bottom of the valve core 420 and the valve body outer cover 410 and the adapter.

[0138] like Figure 15 As shown, the second adapter 430 includes a sixth outer wall 431 and a seventh outer wall 432 connected to the bottom of the sixth outer wall 431. The sixth outer wall 431 is arranged vertically in an annular shape as a whole, and the top abuts against the bottom of the fifth outer wall 422 of the valve core 420. A third threaded structure is arranged on the outside, and the third threaded structure is screwed together with the second threaded structure on the inner side of the bottom of the third outer wall 413 to achieve a tight connection between the second adapter 430 and the valve body cover 410. At the same time, the valve core 420 is limited by the screwed-on valve body cover 410 and the second adapter 430, so that it is tightly fixed and accommodated in the valve body cover 410, thereby improving the air tightness of the air cavity 450 enclosed by the valve body cover 410 and the valve core 420.

[0139] In addition, the connection setting method of the above-mentioned valve body outer cover 410, valve core 420 and second adapter 430 is also conducive to removing the valve core 420 from under the ash discharge valve body assembly without removing the valve body outer cover 410, so as to achieve the effect of convenient and quick replacement and cleaning of the valve core 420.

[0140] Furthermore, the inner side of the sixth outer wall 431 of the second adapter 430 is inclined, and the inner side of the sixth outer wall 431 gradually approaches the first axis from top to bottom, and the extension line of the sixth outer wall 431 forms a second angle with the first axis, that is, the channel in the sixth outer wall 431 is a funnel-shaped structure, and the diameter of the top of the sixth outer wall 431 is larger than the diameter of the ring where the lower port of the air channel 423 at the bottom of the valve core 420 is located, that is, the sixth outer wall 431 is arranged on the periphery of the air channel 423 of the valve core 420 to guide the gas path ejected from each air channel 423 to prevent the gas from diffusing in the direction away from the first axis, and guide the gas ejected from each air channel 423 to converge at the mouth position of the ash discharge nozzle 440, that is, to concentrate its maximum injection pressure to the mouth of the ash discharge nozzle 440, thereby increasing the opening speed of the ash discharge nozzle 440, and reducing the gas pressure threshold for opening the ash discharge nozzle 440, thereby improving the efficiency and quality of ash discharge.

[0141] The seventh outer wall 432 of the second adapter 430 is set vertically downward, and a fourth threaded structure is set on the outer side of the seventh outer wall 432. The fourth threaded structure is screwed with the threaded structure on the inner side of the upper part of the ash discharge nozzle 440 to achieve the effect of tight connection between the ash discharge nozzle 440 and the valve body outer cover 410. At the same time, the seventh outer wall 432 is set vertically downward to guide the gas ejected from each air channel 423 vertically downward, and a large impact force is also formed around the mouth of the ash discharge nozzle 440, so that the opening range of the ash discharge nozzle 440 is increased and it is easy to maintain the open state, thereby improving the ash discharge efficiency.

[0142] Furthermore, a fourth protrusion 433 is provided at the junction of the sixth outer wall 431 and the seventh outer wall 432 of the second adapter 430. This fourth protrusion 433 protrudes outward in a direction away from the first axis. The upper surface of the fourth protrusion 433 abuts the bottom surface of the third outer wall 413 of the valve body outer cover 410, and the lower surface of the fourth protrusion 433 abuts the top surface of the eighth outer wall of the ash discharge nozzle 440. This creates a tighter connection between the valve body outer cover 410, the second adapter 430, and the ash discharge nozzle 440, while also smoothing the exterior of the ash discharge valve body assembly and improving its overall aesthetics. Furthermore, the ash discharge nozzle 440 also includes a ninth outer wall and a self-sealing nozzle.

[0143] Of course, the threaded structure and clamp structure used for connection may also be connected by means of snap-fit, locking or flange, as long as a stable sealing connection between the structures can be achieved and assembly is easy.

[0144] Further, if Figure 16 and Figure 17 As shown, the air outlet pipe 90 of the air pre-purifier is disposed near the sides of the cyclone assembly 10 and the dust collection assembly 30, so that the multiple cyclone tubes 17 in the cyclone assembly 10 are concentrated on the same side of the air outlet pipe 90, and the ash collection basin 32 in the dust collection assembly 30 are concentrated on the same side of the air outlet pipe 90. The phrase "concentrated on the same side of the air outlet pipe" specifically means that at least a portion of the sidewall of the air outlet pipe 90 is located outside the cyclone assembly 10 and the ash collection basin 32. In this case, the cyclone assembly 10 and the ash collection basin 32 are both concentrated on the side corresponding to the other portion of the sidewall of the air outlet pipe 90.

[0145] With this arrangement, the space within the ash basin 32 used to hold dust can be better centralized, and the ash discharge operation of the ash basin 32 is also more convenient. Specifically, the ash basin 32 can be configured as a whole to resemble a funnel, with a single lowest point formed at the bottom of the ash basin 32. An ash discharge port 31 is provided at the lowest point, and the dust within the ash basin 32 is collected toward the lowest point and discharged centrally through the ash discharge port 31. An automatic ash discharge device can be provided at the ash discharge port 31 to automatically discharge the dust in the ash basin. Because the ash basins 32 are centrally arranged on the same side of the air outlet pipe 90, a single ash discharge port 31 for centralized ash discharge can be formed on the ash basin 32. Only one ash discharge port 31 needs to be opened and closed for ash discharge, simplifying the ash discharge operation.

[0146] In addition, the ash collecting basin 32 is centrally arranged on the same side of the outlet pipe 90, which makes it easier to set the ash collecting basin 32 in a detachable form. Not only is the ash collecting space of the ash collecting basin 32 centrally arranged, but at the same time, while keeping the outlet pipe 90 connected to the engine air intake end, the ash collecting basin 32 as an integral structure can be directly removed from the lower part of the swirl assembly 10 and separated from the outlet pipe 90, which also makes the ash discharge operation more convenient.

[0147] Specifically, such as Figure 16 and Figure 17 As shown, the swirl assembly 10 includes an upper plate 11 and a lower plate 12. The inner tube 15 of the swirl tube 17 is connected to the bottom of the upper plate 11, and the air outlet end 13 of the inner tube 15 is connected to the space above the upper plate 11. The outer tube 16 of the swirl tube 17 is connected to the top of the lower plate 12, and the dust outlet end 14 of the outer tube 16 is connected to the space below the lower plate 12. The inner tube 15 can be connected to the upper plate 11 separately or integrally, and the outer tube 16 can be connected to the lower plate 12 separately or integrally. The connecting end of the inner tube 15 extends into the connecting end of the outer tube 16, connecting to the outer tube 16, and forming an air inlet of the swirl tube 17 at the connection, and the air inlet is provided with swirl blades. An upper cover is sealed above the upper plate 11 , and the upper cover and the upper plate 11 together form a confluence assembly 20 to collect the clean air purified by the cyclone tube 17 and send it into the outlet pipe 90 ; the dust collecting assembly 30 is sealed below the lower plate 12 .

[0148] Furthermore, the air outlet pipe 90 is composed of an upper pipe 91 and a lower pipe 92. Figure 17 As shown, the upper tube 91 and the inner tubes 15 of the multiple vortex tubes 17 are integrally formed with the upper plate 11, and the upper tube is offset and arranged on one side of the upper plate 11 so that the inner tubes 15 of the multiple vortex tubes 17 are concentrated on the same side of the upper tube; the lower tube 92 and the outer tubes 16 of the multiple vortex tubes 17 are integrally formed with the lower plate 12, and the lower tube is offset and arranged on one side of the lower plate 12 so that the outer tubes 16 of the multiple vortex tubes 17 are concentrated on the same side of the lower tube.

[0149] A fixing component is provided between the upper tube 91 and the lower tube 92 of the air outlet pipe 90. When assembling the swirl component 10, the one-piece upper plate 11 is directly buckled on the one-piece lower plate 12, so that the upper tube 91 and the lower tube 92 of the air outlet pipe 90 are opposite to each other and connected to each other, so that the inner tube 15 of each swirl tube 17 extends into the corresponding outer tube 16, and then the fixing component is tightened to complete the assembly process of the swirl component 10. One end of the assembled air outlet pipe 90 is connected to the air outlet end 13 of the swirl tube 17 for discharging purified air, and the other end is connected to the engine air intake.

[0150] During use, the air pre-purifier of the present invention has its outlet pipe 90 fixedly connected to the engine's air intake. This serves to secure the entire air pre-purifier, significantly impacting the overall structural strength, connection stability, and operational stability of the device. The aforementioned integrated design ensures stable connections between the outlet pipe 90 and the swirl assembly 10, confluence assembly 20, and dust collection assembly 30, even when the outlet pipe 90 is offset and the swirl tube 17 and ash collection basin 32 are centrally located. This enhances the overall structural strength of the air pre-purifier and further ensures its installation and operational stability.

[0151] Furthermore, the integrated design simplifies the installation process for connecting the outlet pipe 90 and the swirl assembly 10. The outlet pipe 90, upper plate 11, and lower plate 12 only require a single sealing surface, significantly improving the overall sealing performance of the device. Preferably, a sealing ring is provided at the connection between the upper tube 91 and the lower tube 92 to further enhance the sealing performance.

[0152] Further, if Figures 16 and 17 As shown, the multiple cyclone tubes 17 in the cyclone assembly 10 are arranged in a semicircular shape around the air outlet pipe 90. This arrangement is conducive to fully utilizing the space of the cyclone assembly 10, increasing the number of cyclone tubes 17 in the cyclone assembly 10, and thus improving the air purification efficiency.

[0153] The ash collecting basin 32 is detachably connected to the bottom of the cyclone assembly 10. A groove structure 33 with a single-side opening is formed on the ash collecting basin 32. The outlet pipe 90 can be inserted into the groove structure 33 through the opening, so that the ash collecting basin 32 and the outlet pipe 90 can be embedded in each other without hindering the detachment of the ash collecting basin 32 and the outlet pipe 90. The ash collecting basin 32 is provided with extensions on both sides of the groove structure 33. The extensions are extended toward the side walls of the outlet pipe 90 to increase the area of ​​the upper opening of the ash collecting basin 32, so that the ash collecting basin 32 can be arranged corresponding to a larger number of cyclone tubes 17 in the cyclone assembly 10. On the one hand, by cooperating with the cyclone assembly 10, the air purification efficiency is improved. On the other hand, the volume of the ash collecting basin 32 can be increased to accommodate more dust.

[0154] In the present invention, the air pre-purification device as a whole can be set to a rectangular structure or an octagonal structure. In addition, the air pre-purification device as a whole can also be set to a circular or other polygonal structure according to actual needs such as installation space. For the above-mentioned situation where the outlet pipe 90 is offset and the ash collecting basin 32 and the swirl assembly 10 are centrally arranged, it is more advantageous to set the air pre-purification device as a whole to a rectangular or polygonal structure. Specifically, the outlet pipe 90 is set close to the middle position of one of the side edges of the swirl assembly 10. At this time, there is more space on the left and right sides of the outlet pipe 90 for arranging the swirl tube 17. When the swirl assembly 10 occupies the same space, it is more conducive to increasing the number of swirl tubes 17 arranged and improving the filtration efficiency. At the same time, the center of gravity of the swirl assembly 10 as a whole can be closer to the outlet pipe 90, further enhancing the stability of the overall structure of the air pre-purification device.

[0155] Of course, in addition to the above-mentioned preferred embodiments, the air outlet pipe 90 can also be set at the top corner of the rectangular or polygonal cyclone component 10, or set close to the circumference of the circular cyclone component 10. At the same time, the shape of the ash collecting basin 32 is set accordingly, which can basically achieve the technical effect achieved by the utility model.

[0156] Specifically, such as Figure 20 and Figure 21 As shown, the ash collecting basin 32 includes an upper wall 34 and a lower wall 35. The upper wall 34 is formed into an octagon by the upper wall surface, and the upper wall surface close to the air outlet pipe 90 is recessed toward the middle of the ash collecting basin 32 to form a tubular chamber that can accommodate the air outlet pipe 90. The lower wall 35 is composed of four lower wall surfaces that are inclined and converge toward the ash discharge port 31. The top of the lower wall surface is connected to the upper wall surface, and the connection between the left and right sides of the lower wall surface forms an angle, so that the dust and impurities falling into the ash collecting basin 32 are gathered toward the ash discharge port 31 along the groove formed by the angle.

[0157] On the one hand, the above-mentioned setting method can make the upper part of the ash collecting basin 32 have an opening area as large as possible to correspond to more dust outlet ends 14, that is, increase the steam intake of the air pre-purification device. On the other hand, it can make the dust and impurities in the ash collecting basin 32 be discharged more directly and fully, reducing the dead corners where impurities may remain.

[0158] Preferably, the center point of the ash discharge port 31 below the ash collecting basin 32 is located on the lower wall surface on the front side, so that the ash discharge port 31 as a whole is more inclined to be set on the lower wall surface close to the front side. This setting method can further increase the area of ​​the opening above the ash discharge port 31 to facilitate dust to enter the ash discharge port 31.

[0159] Furthermore, when the ash basin 32 is installed at the bottom of the cyclone assembly 10, it must align with the dust outlet ends 14 of the cyclone tubes 17, ensuring that the dust outlet ends 14 of all cyclone tubes 17 are contained within the upper opening of the ash basin 32. Furthermore, a sealed connection between the ash basin 32 and the cyclone assembly 10 is required. To this end, a first sealing structure for sealing the connection and a positioning structure for facilitating quick alignment and installation of the ash basin 32 are provided between the ash basin 32 and the cyclone assembly 10.

[0160] Specifically, the mating mounting structure between the ash basin 32 and the swirl assembly 10 can take various forms. For example, a mounting groove can be provided on the lower plate 12, and the upper edge of the ash basin 32 can be inserted into the corresponding mounting groove to achieve the mounting connection of the ash basin 32. Preferably, a sealing strip is also provided on the lower plate 12 of the swirl assembly 10. The sealing strip is located in the annular mounting groove and corresponds to the upper edge of the ash basin 32. When the ash basin 32 is installed on the lower plate 12, the sealing strip is located exactly at the location where the basin body and the lower plate 12 are connected, thereby enhancing the sealing effect between the ash basin 32 and the swirl assembly 10.

[0161] Further, if Figures 1 to 2 As shown, the mesh cover 41 is disposed around the periphery of the cyclone assembly 10, located between the confluence assembly 20 and the dust collection assembly 30, to protect the cyclone tube 17 in the cyclone assembly 10. Specifically, a first annular mounting groove is provided at the edge of the upper plate 11, and a second annular mounting groove is provided at the edge of the lower plate 12. The upper edge of the annular mesh cover is embedded in the first mounting groove, and the lower edge is embedded in the second mounting groove, so that the mesh cover is stably installed outside the cyclone assembly 10.

[0162] Further, if Figure 1 and Figure 16As shown, the air pre-purification device of the present invention further includes a screen cleaning assembly 50, which can clean impurities (especially large particles) attached to the outside of the screen. The screen cleaning assembly 50 includes a cleaning ring 51, which is fixedly mounted on the top of the swirl assembly 10 and is located outside the screen 41 to clean large particles of impurities blocked outside the screen.

[0163] Specifically, the cleaning ring 51 is a hollow tubular structure. According to the octagonal swirl assembly 10 of this embodiment, the cleaning ring 51 is also configured as an octagonal ring structure to fit the periphery of the mesh cover 41. One side of the cleaning ring 51 is connected to the air inlet pipe 52. A plurality of air holes 53 are provided on the bottom surface of the cleaning ring 51. Pressurized gas is introduced from the air inlet pipe 52 into the cleaning ring 51. After quickly filling the cleaning ring 51, the gas is discharged downwardly from the air holes 53. This exerts downward gas pressure on large impurities adsorbed on the outside of the mesh cover 41. Since these large impurities are adsorbed on the outside of the mesh cover 41 by the lateral suction force of the air inlet, the downward airflow from the air holes 53 intersects with the airflow from the air inlet. That is, the downward airflow blows into the gap between the large impurities and the mesh cover 41, preventing the large impurities from being adsorbed by the suction force of the air inlet and causing them to fall, thereby automatically cleaning the large impurities on the outside of the outer cover.

[0164] Correspondingly, four fixing parts 54 are provided on the cleaning ring 51, and a connecting plate is provided above the fixing part 54, which is fixed to the outer side of the top of the upper plate of the swirl assembly 10 by bolts. Of course, other clamps, snap-fits, plug-in or one-piece molding methods can also be used, as long as the effect of connecting the cleaning ring and the swirl assembly can be achieved.

[0165] Compared to a one-piece design, the split-type cleaning ring in this embodiment offers greater flexibility, allowing users or manufacturers to configure it to meet specific functional requirements. Furthermore, the split-type cleaning ring can be directly installed on existing air pre-purifiers, allowing for direct upgrades to existing products. Furthermore, the existing molds can be reused, eliminating the need to create new molds for new air pre-purifiers, thus reducing production costs.

[0166] Furthermore, a hollow slot is provided at the bottom of the fixing member 54 to avoid blocking the air blowing hole 53 provided at the fixing member from exhausting air downward.

[0167] It is understood that those skilled in the art can, according to actual needs, arrange the cleaning ring at the bottom of the lower plate of the swirl assembly, i.e., at a position that fits the bottom of the screen, and accordingly, open an air hole at the top of the cleaning ring to exhaust upwards, or blow pressurized gas into the gap between the large particle impurities and the screen, thereby separating the large particle impurities from the screen. Of course, the cleaning ring can also be arranged in the middle of the screen, and accordingly, open air holes at the top and bottom of the cleaning ring to exhaust upwards and downwards simultaneously. In addition, two or more cleaning rings can also be arranged simultaneously in different areas of the screen.

[0168] Further, if Figure 16 As shown, in order to make the cleaning ring 51 have a stronger cleaning ability, it is preferably set to the same octagonal shape as the mesh cover 41, so as to improve the fit between the cleaning ring 51 and the mesh cover 41, thereby enhancing the cleaning effect. When the mesh cover of the air pre-purifier is a circular, rectangular or other shape, the cleaning ring 51 can also be adaptively set to a circular or rectangular shape.

[0169] Preferably, the air holes on the cleaning ring 51 are arranged at equal intervals so that the gas charged into the air inlet pipe is evenly distributed within the cleaning ring and then discharged downward at equal gas pressure. Since the suction force gradually increases near the cyclone tube air inlet, the distance between the air holes is equivalent to the diameter of the cyclone tube air inlet, so that there is at least one air hole above each cyclone tube air inlet. This allows the high-pressure gas discharged from the air holes to be in the maximum suction area of ​​the cyclone tube air inlet, and quickly sprayed into the gap between large impurities and the mesh cover to blow off the large impurities, thereby achieving the effect of accurately and efficiently cleaning large impurities.

[0170] Further, if Figure 1 、 Figure 2 and Figure 16 As shown, a containing cover is also provided on the ash collecting basin, and an installation chamber is formed in the containing cover. The ash discharge valve body assembly is installed at the ash discharge port at the bottom of the dust collecting assembly, and the ash discharge control assembly is arranged in the installation chamber of the containing cover. The ash discharge control assembly is connected to the ash discharge valve body assembly to control the opening and closing of the ash discharge valve body assembly.

[0171] Furthermore, the ash discharge control assembly in the automatic ash discharge device includes a pneumatic pipeline and a control valve arranged in the middle of the pneumatic pipeline. The pneumatic pipeline includes a main pipeline, a first branch, and a second branch. One end of the main pipeline is connected to the air pump, and the other end is divided into two, connected to the first branch and the second branch respectively. The first branch is connected to the air inlet of the ash discharge valve body assembly, and the second branch is connected to the air inlet pipe of the cleaning ring. The gas output by the air pump is output to the air inlet and the air inlet pipe through the pneumatic pipeline. A first control valve is provided on the first branch, and a second control valve is provided on the second branch, which are used to control the on-off of the gas transported in the first branch and the second branch, respectively. Among them, the control valve of the ash discharge control assembly can have a variety of setting structures, such as a mechanical valve, a solenoid valve, and a controller.

[0172] Specifically, the ash discharge control component also includes a first control module and a second control module, which are respectively arranged on the first branch and the second branch. The first control module and the second control module monitor the external gas source pressure or time and other parameters through sensors and PLCs, and control the gas on and off in the pneumatic pipeline, thereby realizing the control of the start and stop of the ash discharge valve body assembly.

[0173] Preferably, only one of the first and second control modules is activated. That is, when the first control module is activated, the second control module is deactivated, and vice versa. This prevents the ash discharge valve assembly and the cleaning ring from being activated simultaneously, thereby ensuring that the external air source always maintains sufficient gas pressure and ensures efficient ash discharge. Furthermore, the first and second control modules can be activated alternately to prevent either one from being activated continuously, which could lead to excessive accumulation of dust and impurities within the ash discharge valve assembly or outside the mesh cover.

[0174] Preferably, the control module includes a mechanical valve installed on the pneumatic pipeline. When the air pressure in the external air source does not reach the preset value of the mechanical valve, the mechanical valve remains closed, the gas in the external air source cannot enter the ash discharge valve body assembly or the cleaning ring, and the ash discharge valve body assembly or the cleaning ring does not operate; when the air pressure in the external air source reaches the preset value of the mechanical valve, the mechanical valve automatically opens, and the gas in the external air source flows into the ash discharge valve body assembly or the cleaning ring through the pneumatic pipeline to realize automatic operation of the ash discharge valve body assembly or the cleaning ring.

[0175] Preferably, the control module includes a solenoid valve installed on the pneumatic pipeline, and a controller connected to the solenoid valve. The controller controls the opening and closing of the solenoid valve by monitoring the air pressure value in the external air source, the opening time of the solenoid valve, and the closing time. When the air pressure value in the external air source is monitored to reach a preset value, the controller controls the solenoid valve to open, and the gas in the external air source flows into the ash discharge valve body assembly or the cleaning ring through the pneumatic pipeline to realize the automatic operation of the ash discharge valve body assembly or the cleaning ring; when the air pressure value in the external air source is monitored to be lower than the preset value, or when the opening time of the solenoid valve is monitored to reach a preset value, the controller controls the solenoid valve to close, and the gas in the external air source cannot enter the ash discharge valve body assembly or the cleaning ring, and the ash discharge valve body assembly or the cleaning ring does not operate.

[0176] Furthermore, the response priority of the solenoid valve opening duration reaching a preset value is higher than the response priority of the air pressure in the external air source falling below a preset value. That is, even if the air pressure in the external air source is not lower than the preset value, but the solenoid valve opening duration has reached the preset value, the pneumatic pipeline is still closed to prevent the ash discharge valve body assembly or the cleaning ring from operating for a long time, resulting in insufficient pressure in the external air source, thereby affecting the working efficiency of the external air source. At the same time, after the pneumatic pipeline is closed, it is necessary to monitor the air pressure in the external air source and the closing duration to reach the preset values ​​before the solenoid valve can be opened again to prevent the ash discharge valve body assembly or the cleaning ring from continuing to operate due to the external air source pressure being higher than the preset value for a long time.

[0177] Preferably, the control module can also control the opening and closing of the solenoid valve according to the throttle opening or engine speed of the power machine. When it is detected that the throttle opening or engine speed of the power machine reaches a preset value, the control module controls the solenoid valve to open, and the gas in the external air source flows into the ash discharge valve body assembly or the cleaning ring through the pneumatic pipeline to realize the automatic operation of the ash discharge valve body assembly or the cleaning ring; when it is detected that the throttle opening or engine speed of the power machine is lower than the preset value, the controller controls the solenoid valve to close, and the gas in the external air source cannot enter the ash discharge valve body assembly or the cleaning ring, and the ash discharge valve body assembly or the cleaning ring does not operate.

[0178] In addition to the above-mentioned configuration, the ash discharge valve body assembly and the cleaning ring can also be controlled separately, that is, two relatively independent control units are included to independently control the ash discharge valve body assembly and the cleaning ring.

[0179] The external air source in the control system of the present invention can be an air pump of a power machine equipped with the air pre-purification device, or an air compressor, an air storage tank, etc.

[0180] The terms “above”, “below” and “within” mentioned above include the number or entity itself; the terms “exceed” and “outside” do not include the number or entity itself.

[0181] The present invention has been further described above with the aid of specific embodiments. However, it should be understood that the specific descriptions herein should not be construed as limiting the essence and scope of the present invention. Any modifications made to the above embodiments by a person skilled in the art after reading this specification are within the scope of protection of the present invention. The various specific technical features described in the above specific embodiments may be combined in any suitable manner unless there is any contradiction. To avoid unnecessary repetition, the present invention will not further describe various possible combinations in the embodiments.

[0182] If the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), such directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

Claims

1. An air pre-purification device capable of automatically discharging dust, characterized in that: The vortex filter bag is a kind of filter bag that is designed to remove dust from the vortex filter bag and to remove dust from the vortex filter bag. The filter bag is made of stainless steel and has a pulsating vortex filter. The filter bag is made of stainless steel and has a pulsating vortex filter bag. The pulsating vortex filter bag is a kind of filter bag that is designed to remove dust from the vortex filter bag and to remove dust from the vortex filter bag. The pulsating vortex filter bag is a kind of filter bag that is designed to remove dust from the vortex filter bag and to remove dust from the vortex filter bag.

2. The air pre-purification device capable of automatically discharging dust according to claim 1, characterized in that: It also includes a control module and a pneumatic pipeline. The two ends of the pneumatic pipeline are respectively connected to the air source and the ash discharge valve body assembly. The control module is arranged on the pneumatic pipeline. The control module can control the on and off of the pneumatic pipeline to open or close the ash discharge valve body assembly. A containing cover is provided on the ash collecting basin, and the control module is arranged in the containing cover.

3. The air pre-purification device capable of automatically discharging dust according to claim 1, characterized in that: The swirl assembly includes an upper plate, the swirl tube includes an inner tube, the air outlet pipe includes an upper tube, the upper tube and the inner tubes of the multiple swirl tubes are integrally formed with the upper plate, and the upper tube is offset and arranged on one side of the upper plate so that the inner tubes of the multiple swirl tubes are concentrated on the same side of the upper tube; and / or, the swirl assembly includes a lower plate, the swirl tube includes an outer tube, the air outlet pipe includes a lower tube, the lower tube and the outer tubes of the multiple swirl tubes are integrally formed with the lower plate, and the lower tube is offset and arranged on one side of the lower plate so that the outer tubes of the multiple swirl tubes are concentrated on the same side of the lower tube.

4. The air pre-purification device capable of automatically discharging dust according to claim 1, characterized in that: The multiple swirl tubes in the swirl assembly are arranged in a semicircle around the outlet pipe. A groove structure with a single-side opening is formed on the ash collecting basin. The outlet pipe is embedded in the groove structure through the opening. The ash collecting basin is provided with extensions on both sides of the groove structure, and the extensions are extended toward the side walls of the outlet pipe.

5. The air pre-purification device capable of automatic dust removal according to claim 1, characterized in that: The ash collecting basin includes an upper wall and a lower wall connected to each other. The upper wall is surrounded by multiple upper wall surfaces, and the upper wall close to the air outlet pipe is recessed toward the middle of the ash collecting basin to form a tubular chamber that can accommodate the air outlet pipe. The lower wall is surrounded by multiple inclined lower wall surfaces, and the bottom converges to form an ash discharge port.

6. The air pre-purification device capable of automatically discharging dust according to any one of claims 1 to 5, characterized in that: A connection area for connecting with the ash collecting basin is provided in the ash discharge valve body assembly, and a dust gathering area is provided below the connection area. The dust gathering area includes an inclined slope, and the slope can make the dust gathering area as a whole have a funnel-shaped structure that is wide at the top and narrow at the bottom. A gas collection area is provided around the outside of the dust gathering area, and a dust gas discharge area is provided below the dust gathering area. The gas collection area and the dust gas discharge area are connected through the air outlet, and the air source is connected to the gas collection area. A normally closed ash discharge nozzle is connected below the dust gas discharge area. When the gas flows along the gas collection area to the dust gas discharge area, the ash discharge nozzle opens and discharges the gas to discharge the dust in the dust collection area from the ash discharge nozzle.

7. The air pre-purification device capable of automatically discharging dust according to claim 6, characterized in that: A guide structure is provided in the dust gas discharge area, and the guide structure is inclined toward the dust discharge nozzle to guide the gas flowing out of the gas collection area to move toward the location of the dust discharge nozzle.

8. The air pre-purification device capable of automatically discharging dust as claimed in claim 6, characterized in that: The ash discharge valve body assembly includes a detachably connected shell and a valve core, the upper end of the shell is connected to the ash discharge port of the ash collecting basin, and the lower end of the shell is connected to the ash discharge nozzle. The valve core is located in the shell, and the valve core is a hollow structure with two ends passed through, including an inclined ninth side wall, and a vertically arranged tenth side wall is connected below the ninth side wall. The ninth side wall and the tenth side wall of the valve core are respectively sealed with the shell to form an air cavity between the shell and the ninth side wall and the tenth side wall of the valve core. At least one air channel is provided on the tenth side wall, and an air inlet connected to the air cavity is provided on the shell.

9. The air pre-purification device capable of automatically discharging dust according to claim 8, characterized in that: The air channel includes an upper port and a lower port, the upper port is arranged on the outside of the tenth side wall, and the lower port is arranged at the bottom of the tenth side wall. The upper end of the ninth side wall and the lower end of the tenth side wall of the valve core are respectively sealed with the shell to form an air cavity between the shell and the ninth and tenth side walls of the valve core. At least one air channel is provided at the bottom of the tenth side wall.

10. The air pre-purification device capable of automatically discharging dust according to claim 8 or 9, characterized in that: The shell includes a detachably connected valve body outer cover and a first adapter. The lower end of the valve core abuts against the abutment on the valve body outer cover, the upper end of the valve core abuts against the lower end of the first adapter, and the upper end of the first adapter is connected to the ash discharge port of the ash collecting basin to fix the valve core in the valve body outer cover.

11. The air pre-purification device capable of automatically discharging dust according to claim 10, characterized in that: A third connecting piece is provided on the outer cover of the valve body, a second boss is formed on the third connecting piece, the lower end of the valve core abuts the second boss, and a fifth flange is extended laterally outward from the bottom of the tenth side wall of the valve core, and a second sealing groove is formed between the fifth flange and the second boss; and / or, a second connecting piece is provided on the outer cover of the valve body, a first boss is formed on the second connecting piece, a third flange is extended laterally outward from the top of the ninth side wall of the valve core, the third flange abuts the first boss, the upper part of the second connecting piece is connected to the third side wall, the third side wall is detachably connected to the first adapter, a fourth flange is extended longitudinally upward from the top of the ninth side wall of the valve core, the lower end of the first adapter abuts the fourth flange, and a first sealing groove is formed between the lower end of the first adapter and the third side wall, the third flange and the fourth flange.

12. The air pre-purification device capable of automatically discharging dust according to claim 11, characterized in that: The air duct is integrally formed and penetrates the bottom of the tenth side wall, and is tilted from top to bottom gradually approaching the central axis of the valve core. A guide wall is provided at the position corresponding to the air duct outlet on the third connecting piece. The guide wall is in an inverted cone shape and is tilted toward the ash discharge nozzle.

13. The air pre-purification device capable of automatically discharging dust according to claim 10, characterized in that: The first adapter is a hollow structure with both ends passing through, including a first side wall, a second side wall and a first connecting member. The circumferential dimensions of the first side wall and the second side wall are different. One end of the first connecting member is connected to the bottom of the first side wall, and the other end is connected to the top of the second side wall. The top of the first side wall is connected to the ash discharge port of the ash collecting basin, and the bottom of the second side wall is connected to the outer cover of the valve body.

14. The air pre-purification device capable of automatically discharging dust according to claim 10, characterized in that: The outer cover of the valve body is a hollow structure with both ends through, including a fourth side wall and a fifth side wall. The fourth side wall is extended vertically to form a gap with the tenth side wall of the valve core in the lateral direction. The fifth side wall is gradually arranged from top to bottom toward the central axis of the valve body cover, and is spaced with the ninth side wall of the valve core in the vertical direction. The fourth side wall, the fifth side wall, the ninth side wall and the tenth side wall together enclose an air cavity.

15. The air pre-purification device capable of automatically discharging dust according to claim 6, characterized in that: The ash discharge valve body assembly includes a detachably connected valve body outer cover and a valve core. The valve body outer cover includes a first outer wall, a second outer wall and a third outer wall connected in sequence from top to bottom. The first outer wall is detachably connected to the ash collecting basin. The second outer wall is inclined from top to bottom gradually approaching the central axis of the valve body outer cover. A cavity for accommodating the valve core is formed inside the third outer wall, and an air inlet hole is provided on the third outer wall.

16. The air pre-purification device capable of automatically discharging dust according to claim 15, characterized in that: The outer cover of the valve body includes a first protrusion, which is arranged at the top of the third outer wall. The lower part of the outer cover of the valve body is connected to the second adapter. The upper end of the valve core abuts against the first protrusion, and the lower end of the valve core abuts against the second adapter, so that the valve core is fixedly arranged inside the outer cover of the valve body.

17. The air pre-purification device capable of automatically discharging dust according to claim 15 or 16, characterized in that: The valve core is a hollow structure with both ends passed through, and is arranged opposite to the third outer wall of the valve body outer cover. A second protrusion and a third protrusion are arranged on the valve core, and the second protrusion abuts the third outer wall to form a third sealing groove, and a third sealing ring is placed in the third sealing groove. The third protrusion abuts the third outer wall to form a fourth sealing groove, and a fourth sealing ring is placed in the fourth sealing groove.

18. The air pre-purification device capable of automatically discharging dust according to claim 15 or 16, characterized in that: The valve core includes a fourth outer wall and a fifth outer wall. The distance between the fourth outer wall and the third outer wall is greater than the distance between the fifth outer wall and the third outer wall, so as to form an air cavity that is narrow at the top and wide at the bottom between the valve core and the outer cover of the valve body. An air channel connecting the air cavity and the gas discharge area is provided at the bottom of the fifth outer wall.

19. The air pre-purification device capable of automatically discharging dust according to claim 16, characterized in that: The second adapter includes a sixth outer wall and a seventh outer wall. The sixth outer wall is detachably connected to the third outer wall of the valve body outer cover. The seventh outer wall is connected to the ash discharge nozzle. The inner side of the sixth outer wall is inclined from top to bottom toward the central axis of the second adapter to guide the movement direction of the gas flowing out of the airway. A fourth protrusion is provided on the second adapter, and the fourth protrusion is set outward from the second adapter to abut against the ash discharge nozzle.

20. The air pre-purification device capable of automatically discharging dust as claimed in claim 1, characterized in that: It also includes an ash discharge control component, which includes a control module and a pneumatic pipeline. The two ends of the pneumatic pipeline are respectively connected to the air source and the ash discharge valve body component. The control module is arranged on the pneumatic pipeline. The control module can control the on and off of the pneumatic pipeline to open or close the ash discharge valve body component.

21. The air pre-purification device capable of automatically discharging dust according to claim 20, characterized in that: A mechanical valve that controls the on-off of the pneumatic pipeline is provided in the control module. The mechanical valve is set with a preset air pressure value. When the air pressure in the air source reaches the preset value of the mechanical valve, the mechanical valve automatically opens.

22. The air pre-purification device capable of automatically discharging dust as claimed in claim 20, characterized in that: The control module is equipped with a solenoid valve that controls the on and off of the pneumatic pipeline. The control module can monitor at least one parameter among the air pressure in the air source, the opening time of the solenoid valve, the closing time of the solenoid valve, the throttle opening of the power machinery and the engine speed to control the opening and closing of the solenoid valve.

23. The air pre-purification device capable of automatically discharging dust as claimed in claim 22, characterized in that: The control module monitors the air pressure in the air source, the opening time and closing time of the solenoid valve. When the solenoid valve is controlled to be closed, the response priority of the opening time of the solenoid valve is higher than the response priority of the air pressure value in the external air source.

24. The air pre-purification device capable of automatically discharging dust according to any one of claims 20 to 23, characterized in that: An air intake mesh cover is provided on the outside of the swirl component, and a mesh cover cleaning assembly is provided on the air pre-purification device near the air intake mesh cover. The mesh cover cleaning assembly includes a cleaning ring, an air duct is formed inside the cleaning ring, and the air duct is connected to the air source. The cleaning ring is provided with blowing holes facing the air intake mesh cover, and the dust discharge control assembly is also used to control the mesh cover cleaning assembly.

25. The air pre-purification device capable of automatically discharging dust as claimed in claim 24, characterized in that: The pneumatic pipeline includes a main pipeline, a first branch and a second branch. One end of the main pipeline is connected to the air pump, and the other end is connected to the first branch and the second branch respectively. The first branch is connected to the ash discharge valve body assembly, and the second branch is connected to the cleaning ring. A first control valve is provided on the first branch, and a second control valve is provided on the second branch. The first control valve and the second control valve respectively control the on and off of the gas transported in the first branch and the second branch.

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