Composite filtering device

Abstract

The utility model discloses a composite filtering device which comprises a filter element, a rotational flow assembly and a dust collecting assembly, a sealing shell is arranged outside the filter element, the upper portion of the rotational flow assembly is connected with the sealing shell so that a confluence cavity can be formed between the filter element and the rotational flow assembly, and air filtered by the rotational flow assembly enters the filter element upwards through the confluence cavity. The lower portion of the rotational flow assembly is connected with the dust collection assembly to form a dust collection cavity, and an ash discharge port is formed in the bottom of the dust collection cavity and connected with an automatic ash discharge device so that separated dust can be automatically discharged after falling into the dust collection cavity. According to the composite filtering device, the air pre-purifying device and the automatic ash discharging device are arranged in a composite mode, so that dust separated by the air purifying device falls into the dust collecting cavity and then is automatically discharged downwards, and the composite filtering device has the advantages that the ash discharging amount is large, the total amount and speed of ash discharging in unit time are effectively increased, and the ash discharging efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of engine air intake filtration, in particular to a composite filtering device. 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 air pre-purification device and the air filter are currently set separately, so an additional air pipeline needs to be set up. In addition, a large amount of dust and impurities filtered by the device are collected in a closed ash basin. The capacity of the ash 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 suspended, and then the ash basin needs to be manually opened for cleaning. If it is not cleaned in time, it may easily cause damage to the engine.

[0005] Therefore, the current air filtration part not only has the disadvantages of complex structure, large space occupation and difficulty in installation, but also the ash collection basin method greatly reduces work efficiency, increases the work intensity and repetitive labor of personnel, has poor convenience and low economic benefits. Utility Model Content

[0006] The purpose of this utility model is to provide a composite filter device with a compact structure and easy installation, which can automatically realize the dust discharge action, save space, be easy to install, and improve the efficiency and convenience of dust discharge. The specific technical solution is as follows:

[0007] A composite filtering device includes a filter element, a cyclone component and a dust collecting component. A sealing shell is provided on the outside of the filter element. The upper part of the cyclone component is connected to the sealing shell to form a confluence chamber between the filter element and the cyclone component. The air filtered by the cyclone component enters the filter element upward through the confluence chamber. The lower part of the cyclone component is connected to the dust collecting component to form a dust collecting chamber. An ash discharge port is formed at the bottom of the dust collecting chamber. The ash discharge port is connected to an automatic ash discharge device so that the separated dust falls into the dust collecting chamber and is automatically discharged.

[0008] Furthermore, the cyclone assembly includes an upper support plate and a plurality of cyclone tubes arranged on the upper support plate. The upper support plate includes a plate surface and a dust return area formed at the bottom of the plate surface. The dust return area is connected to the cyclone tubes. The plate surface is inclined from top to bottom toward the dust return area to guide the impurities on the plate surface to gather along the plate surface to the dust return area and then fall into the dust collecting chamber through the cyclone tubes.

[0009] Furthermore, the upper support plate includes two plates, which are arranged at an angle relative to each other. The dust return area is located at the connection between the two plates. At least one row of vortex tubes is arranged below the dust return area. The vortex tubes include an upper tube and a lower tube. The air outlet on the upper tube is connected to the dust return area.

[0010] Furthermore, a funnel-shaped air outlet side wall is provided on the air outlet connected to the dust return area to increase the area of ​​communication between the air outlet and the dust return area. The air outlet side walls are arranged tangentially so that all impurities collected in the dust return area can enter the cyclone tube.

[0011] Furthermore, the swirl assembly also includes a lower support plate, the lower tube of the swirl tube is connected to the lower support plate, the dust outlet on the lower tube is connected to the dust collecting assembly, the upper tube and the lower tube are sleeved, the setting height of the swirl tube gradually decreases from the front and rear ends to the middle direction, and the lower support plate is tilted downward from the front and rear ends to the middle direction.

[0012] Furthermore, the dust collecting assembly includes a fifth connecting plate arranged opposite to each other on the left and right, and a sixth connecting plate arranged opposite to each other on the front and back. A conical groove is provided on the top edge of the fifth connecting plate. The fifth connecting plate and the sixth connecting plate are arranged in an enclosed manner. The bottom edges of the fifth connecting plate and the sixth connecting plate extend downward to form an inverted trapezoidal busbar. The bottom of the busbar is connected and enclosed to form an ash discharge port. A guide groove is formed between the busbars, so that dust falling into the dust collecting assembly gathers in the guide groove.

[0013] Furthermore, the ash discharge valve body assembly on the automatic ash discharge device includes a detachably connected shell and a valve core, the upper end of the shell is connected to the dust discharge port of the discharge assembly, and the lower end of the shell is connected to the ash discharge nozzle. The valve core is arranged 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 shell includes a detachably connected valve body cover and an adapter, the lower end of the valve core abuts against the abutment on the valve body cover, the upper end of the valve core abuts against the lower end of the adapter, and the upper end of the adapter is connected to the dust collection unit to fix the valve core in the valve body cover. A third connecting piece is provided on the valve body cover, and a second boss is formed on the third connecting piece. The lower end of the valve core abuts against the second boss. 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. The air duct is integrally formed and is set at the bottom of the tenth side wall. It is tilted in a direction from top to bottom and gradually approaches the center 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.

[0015] Furthermore, the air duct includes an upper port and a lower port, the upper port is arranged on the outside of the tenth side wall, the lower port is arranged at the bottom of the tenth side wall, the guide wall includes a seventh side wall and an eighth side wall arranged below the seventh side wall, the seventh side wall is inclined from top to bottom toward the central axis of the shell, the eighth side wall is vertically arranged, the height of the eighth side wall is less than the height of the seventh side wall, the valve body cover includes a sixth side wall, the third connecting piece includes an outer ring end and an inner ring end, the inner ring end is connected to the guide wall, the outer ring end is connected to the sixth side wall, the ash discharge nozzle is detachably connected to the sixth side wall, and the valve body cover A second connecting piece is provided on the valve body, and 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, and the third flange abuts against the first boss. The outer cover of the valve body is a hollow structure with two ends passed 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 horizontal direction. The fifth side wall is gradually arranged toward the central axis of the outer cover of the valve body from top to bottom, and is spaced from 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.

[0016] Furthermore, the upper portion of the second connecting piece is connected to the third side wall, and the third side wall is detachably connected to the adapter. A fourth flange is longitudinally extended upward from the top of the ninth side wall of the valve core, and the lower end of the adapter abuts against the fourth flange. A first sealing groove is formed between the lower end of the adapter and the third side wall, the third flange, and the fourth flange. The adapter is a hollow structure with through-holes at both ends, including a first side wall, a second side wall and a first connecting piece. The circumferential dimensions of the first side wall and the second side wall are different. One end of the first connecting piece 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 dust collection unit, and the bottom of the second side wall is connected to the valve body outer cover. The adapter includes a first flange, and the first flange is connected to the first connecting piece. The ninth side wall of the valve core is connected to the fourth side wall of the valve body outer cover to form a first angle, and the tenth side wall of the valve core is connected to the fifth side wall of the valve body outer cover to form a second angle. The air channel is arranged near the tip of the second angle, and the first angle and the second angle are arranged as acute angles. The upper end of the ninth side wall of the valve core and the lower end of the tenth side wall 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 arranged at the bottom of the tenth side wall. The ninth side wall of the valve core encloses a first chamber, which is arranged in an inverted cone shape. The tenth side wall encloses a second chamber, which is columnar. The height of the tenth side wall is less than that of the ninth side wall.

[0017] The composite filtering device of the utility model has the following advantages:

[0018] 1. By combining the air pre-purification device and the automatic dust discharge device, the dust separated by the air purification device falls into the dust collecting chamber and is automatically discharged downward.

[0019] 2. The ash discharge volume is large, effectively increasing the total amount and speed of ash discharge per unit time, and improving the ash discharge efficiency;

[0020] 3. Reduce the gas pressure loss of external gas source and significantly save gas flow;

[0021] 4. The airflow inside the automatic dust discharge device moves smoothly, and the negative pressure formed is large, which is conducive to the rapid discharge of dust;

[0022] 5. Easy to disassemble and maintain, and good sealing effect;

[0023] 6. Simplified the production process and reduced production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional diagram of the composite filtering device of the present utility model.

[0025] Figure 2 It is a side view of the composite filtering device of the utility model.

[0026] Figure 3 It is a cross-sectional view of the composite filtering device of the utility model.

[0027] Figure 4 It is a three-dimensional diagram of the upper support plate in the composite filtering device of the present utility model.

[0028] Figure 5 It is a side view of the upper support plate in the composite filtering device of the utility model.

[0029] Figure 6 It is a three-dimensional diagram of the lower supporting plate in the composite filtering device of the utility model.

[0030] Figure 7 It is an overall schematic diagram of the automatic dust discharge device in the composite filtering device of the utility model.

[0031] Figure 8 yes Figure 7 Cross-section Figure 1 .

[0032] Figure 9 yes Figure 7 A three-dimensional view of the first adapter.

[0033] Figure 10 yes Figure 7 A three-dimensional view of the outer cover of the middle valve body.

[0034] Figure 11 yes Figure 7 A three-dimensional view of the middle valve core.

[0035] Figure 12 yes Figure 11 sectional view of .

[0036] Figure 13 yes Figure 7 Cross-section Figure 2 .

[0037] Figure 14 yes Figure 3 Three-dimensional view of the middle ash discharge nozzle. DETAILED DESCRIPTION

[0038] like Figures 1 to 14As shown, the composite filtration device of the present invention includes, from top to bottom, an air filter 300, an air pre-purifier 400, and an automatic dust discharge device 500. The air pre-purifier 400 includes a cyclone assembly 10 and a dust collection assembly 30. The air filter 300 is located above the cyclone assembly 10 and is connected to the air outlet 13 of the cyclone assembly 10. The dust collection assembly 30 is located below the cyclone assembly 10 and is connected to the dust outlet end of the cyclone assembly 10. The automatic dust discharge device 500 is located below the dust collection assembly 30 and is connected to the dust discharge port 31 of the dust collection assembly 30. The air outlet pipe 90 on the air filter 300 is connected to the air intake of the engine.

[0039] As a result, air containing dust and impurities enters the cyclone assembly 10, undergoing a swirling motion. Impurity particles spiral downward, passing through the dust outlet of the cyclone assembly 10 and falling into the dust collection assembly 30. The dust collection assembly 30 is a funnel-shaped structure with at least one dust discharge port 31 formed at the bottom. An automatic dust discharge device 500 is detachably connected to the dust discharge port and maintains a high degree of sealing. The control system automatically discharges dust from the dust collection assembly 30 downward. The purified air spirals upward, passing through the air outlet 13 of the cyclone assembly 10, and enters the air filter 300 for a second filtration before flowing through the outlet pipe 90 to the engine. The cyclone assembly 10 preferably includes multiple cyclone tubes 17 arranged side by side.

[0040] Furthermore, the automatic ash discharge device 500 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.

[0041] When the air pre-purifier 400 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-purifier 400 is connected to the engine. Since the engine will vibrate when it is working, the air pre-purifier 400 will vibrate. The dust accumulated at the ash discharge port will fall further downward due to the vibration. The bottom of the ash discharge valve body assembly 100 is provided with a self-sealing ash discharge nozzle. When the ash discharge control assembly 200 is in the closed state, the bottom of the ash discharge nozzle is closed and the dust is completely 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.

[0042] The ash discharge nozzle can be a normally closed elastic ash discharge nozzle made of rubber, or it can be a structure such as a cover plate connected to a spring that can automatically reset to achieve sealing. At this time, when the automatic ash discharge device 500 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 500 is closed, the ash discharge nozzle can be closed by automatically resetting or restoring its shape.

[0043] In addition to the above preferred embodiment, the ash discharge nozzle can also adopt a conventional sealing structure, with the opening and closing of the ash discharge nozzle being instantly controlled by a control device. In this case, the ash discharge nozzle needs to be controlled to open when the automatic ash discharge device 500 is activated to achieve automatic ash discharge, and to be controlled to close when the automatic ash discharge device 500 stops working. Compared with the above preferred embodiment, 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.

[0044] Specifically, such as Figure 1 and 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 100 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 100 along the first axis. When the ash discharge control assembly 200 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 100, and the chamber is connected to the inside of the channel. When the ash discharge valve body assembly 100 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.

[0045] 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 in 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 100. The dust collection area has an inclined surface, which gives the dust collection area an overall funnel-shaped structure that is wide at the top and narrow at the 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.

[0046] The second path includes a gas gathering area, an air outlet 13, 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 13 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.

[0047] 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.

[0048] 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.

[0049] 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 junction of the dust discharge area and the gas discharge area, which helps the dust contained therein to be discharged downward more quickly and avoids blocking the dust above it, thereby improving the efficiency of downward discharge of dust above the tubular channel after the dust discharge control assembly 200 is opened. It is 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.

[0050] 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.

[0051] 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.

[0052] The ash discharge valve body assembly 100 is set according to the areas and functions within the above-mentioned first path and second path. The ash discharge valve body assembly 100 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 500, make it easy to disassemble and maintain, and ensure its sealing.

[0053] The housing is provided with an air inlet hole connected to the gas collection area, and the air outlet 13 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 13 of the gas collection area includes an integrally formed air duct that penetrates the valve core, one end of the air duct is connected to the gas collection area, and the other end is connected to the dust discharge area and the gas discharge area. The configuration of the integrally formed air outlet 13 makes the air duct have a stable structure, which is not easy to deform under the impact of the high-pressure gas in the gas collection area, and can make the air duct have good sealing properties, which helps to maintain the gas pressure in the second path. Furthermore, under the unit gas capacity, the air outlet 13 enables the automatic dust discharge device 500 to have a longer jet time, which is equivalent to saving gas in the air pump and increasing the dust discharge efficiency.

[0054] The valve core is located in the outer cover of the valve body, and a hollow channel running through the upper and lower parts is formed in the middle of the valve core. 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 a detachable split structure. The valve core and the shell are connected by two groups of sealing components. 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 enables the valve core to be disassembled from the top or bottom on the other hand to maintain and clean the inside of the gas collection area.

[0055] In order to better understand the purpose, structure and function of the present invention, the composite filter device of the present invention will be described in further detail below with reference to the accompanying drawings, taking the specific structure of the composite filter device as an example.

[0056] The composite filtration device includes, from top to bottom, an air filter 300, an air pre-cleaner 400, and an automatic ash discharger 500. The air pre-cleaner 400 separates impurities and particles from the air through internal swirling motion and transfers them to the automatic ash discharger 500 below. The automatic ash discharger 500 automatically discharges ash via a control system. After the initial filtration by the air pre-cleaner 400, the air flows upward into the air filter 300, which then performs a secondary filtration before delivering the clean air to the engine.

[0057] like Figure 1 As shown, the air pre-purification device 400 has a square structure as a whole, including a cyclone component and a dust collecting component arranged upper and lower. The end of the device close to the air filter 300 is defined as the top, the end close to the automatic dust discharge device 500 is defined as the bottom, the end close to the air outlet pipe of the air filter 300 is defined as the right, and the other end away from the air outlet pipe of the air filter 300 is positioned as the left. The surface shown in the figure is the front, and the other surface not shown is the back. The height of the cyclone component gradually decreases from the front and rear ends to the middle direction, so that the air impurities near the top air outlet 13 of the cyclone component gather to the low point in the middle and then enter the dust collecting component downward, thereby improving the filtering effect of the air pre-purification device 400 and also improving the service life of the air filter 300.

[0058] Specifically, a plurality of swirl tubes are arranged in a horizontal array inside the swirl assembly. The swirl tubes include an upper tube 18 and a lower tube 19. The connecting end of the upper tube 18 is inserted into the connecting end of the lower tube 19 and is sleeved, thereby forming an air inlet with an annular gap at the sleeve. The air inlet is provided with swirl blades. An air outlet 13 is provided upward at the other end of the upper tube 18, and a dust outlet 14 is provided downward at the other end of the lower tube 19. The diameter of the upper tube 18 is smaller than the diameter of the lower tube 19 at the sleeve. After the external air to be purified enters the swirl tube, it is first spirally downward and then upward and is sucked into the air filter 300, and flows to the engine through the outlet pipe.

[0059] Further, such as Figure 4 As shown, the swirl assembly also includes an upper support plate 20 and a lower support plate 40. The upper tube 18 of the swirl tube is connected to the bottom of the upper support plate 20, and the air outlet 13 of the upper tube 18 is connected to the space above the upper support plate 20; the lower tube 19 of the swirl tube is connected to the top of the lower support plate 40, and the dust outlet 14 of the lower tube 19 is connected to the space below the lower support plate 40; the upper tube 18 can be connected to the upper support plate 20 separately or as an integral part, and the lower tube 19 can be connected to the lower support plate 40 separately or as an integral part.

[0060] The upper portion of the upper support plate 20 is sealed against the sealed housing of the air filter 300. Together, the upper support plate 20 and the sealed housing form a confluence chamber that collects clean air purified by the cyclone tube and delivers it to the air filter 300. The dust collection assembly is sealed beneath the lower support plate 40. An upward-facing square first mounting groove 27 is provided at the edge of the upper support plate 20, while a corresponding downward-facing square first mounting groove 28 is provided at the edge of the lower support plate 40. The lower edge of the sealed housing is embedded in the first mounting groove 27, and the upper edge of the dust collection assembly is embedded in the first mounting groove 28, ensuring a stable connection of the composite filter device.

[0061] Preferably, the height of the swirl tubes gradually decreases from the front and rear ends toward the center. That is, the swirl tubes located in the front and rear rows have the highest first height, while the swirl tubes located in the middle row have the lowest second height. Consequently, the upper support plate 20 and the lower support plate 40 adapt to the height of the swirl tubes, forming a groove structure with a height gradually decreasing from the front and rear ends toward the center. The lowest points of the upper support plate 20 form a long strip of dust return area 50. Correspondingly, the lower support plate 40 also forms a groove structure with a height gradually decreasing from the front and rear ends toward the center. The first mounting grooves 27 and 28 on the left and right sides form an inverted cone structure.

[0062] The purpose of setting up the above structure is that when the air filtered by the swirl component for the first time is sucked into the confluence chamber above, some unseparated impurities will be entrained. These impurities are not sucked into the filter element of the air filter 300 due to their large size or weight. When the engine stops, they fall to the top surface of the upper support plate 20 again. At this time, the upper support plate 20 structure with high ends and low middle can guide the above impurities to move to the dust return area 50, and then through the air outlet 13 near the dust return area 50, fall back to the dust outlet 14 and then be discharged to the dust collecting component, thereby avoiding the above impurities being repeatedly blown up in the confluence chamber when the engine is started again, thereby improving the filtering effect and the service life of the air filter 300.

[0063] Preferably, a row of swirl tubes in the swirl assembly is relatively arranged below the dust return area 50 of the upper support plate 20, and the dust return area 50 passes through the air outlet 13 of the upper tube 18 of the swirl tube, so that impurities gathered near the dust return area 50 can quickly fall into the air outlet 13 to avoid accumulation in the dust return area 50.

[0064] Further, such as Figure 5 As shown, a funnel-shaped air outlet side wall 25 that is wide at the top and narrow at the bottom is provided on the air outlet 13 connected to the dust return area 50 to increase the area of ​​communication between the air outlet 13 and the dust return area 50. The top outer edge of the air outlet side wall 25 forms a tangent positional relationship so that all impurities gathered in the dust return area 50 enter the cyclone tube, thereby improving the effect of the impurities falling back downward.

[0065] Furthermore, a longitudinal connecting column is set between the upper support plate 20 and the lower support plate 40 to stably connect the upper support plate 20 and the lower support plate 40. The connecting column is set at the corners of the upper support plate 20 and the lower support plate 40 to avoid affecting the array arrangement of the vortex tubes. The connecting column can be fixedly connected by clipping or bolts.

[0066] Furthermore, the first mounting groove 27 extends downward at the four right-angled sides of the cyclone component to set prismatic side walls. The adjacent prismatic side walls and the first mounting groove 27 above are enclosed to form a groove opening downward. A filter screen is clamped in the groove. The filter screens at the front and rear ends are square, and the filter screens at the left and right ends have an inverted conical groove on the top and a protruding inverted conical structure on the bottom. The bottom of the above-mentioned filter screen is clamped with the top of the first mounting groove 28, so that the filter screen is fixed on the four sides of the cyclone component to perform preliminary filtering of large particles of dust and impurities.

[0067] Furthermore, a rain shield is provided on the inner side of the filter screen. The rain shield is provided in a downward-opening groove formed by the adjacent prism side walls and the first mounting groove 27 above. The bottom of the rain shield is slightly lower than the height of the air inlet between the upper tube 18 and the lower tube 19 of the cyclone tube to stop rain and snow entering the air inlet, so that the interior of the composite filter device remains dry. The rain shield can be clipped or bolted to the prism side walls and the first mounting groove 27, or can be integrally formed with the upper support plate 20.

[0068] Further, filter cotton can be installed above the upper support plate 20, and the air discharged from the cyclone outlet 13 enters the air filter 300 through the filter cotton. The filter cotton can be disassembled and can be removed for cleaning after using for a period of time, and the filter cotton can be used repeatedly.

[0069] The air filter 300 is a cylindrical structure arranged with the left and right directions as the axis, including a sealing shell and a filter element installed in the sealing shell. The two sides of the sealing shell are closed with end covers, wherein the right end cover has an air outlet pipe. The end covers on the left and right sides of the sealing shell are installed in a detachable manner. Preferably, the end covers are connected to the sealing shell using snaps. The lower end of the sealing shell is sealed with the upper end of the first mounting groove 27. The air enters the sealing shell after passing through the filter cotton on the upper support plate 20, and then obtains clean air through the filter element under the action of negative pressure. The air after the second filtration is discharged through the air outlet pipe.

[0070] Specifically, the sealing shell includes a cylindrical portion and a connecting plate located at the lower end of the cylindrical portion. The cylindrical portion and the connecting plate are formed as one piece. The connecting plate includes a conical first connecting plate and a second connecting plate arranged opposite to each other on the left and right, and a rectangular third connecting plate and a fourth connecting plate arranged opposite to each other in the front. The above-mentioned connecting plates are respectively clamped to the structure of the first mounting groove 27 on the cyclone assembly, and are further fixed and connected by bolts to keep it stable and airtight. The interior of the cylindrical portion has a circular inner hole, the axis of the cylindrical portion is horizontally arranged, and the filter element is installed in the circular inner hole of the cylindrical portion.

[0071] The dust collecting assembly is a funnel-shaped structure with an ash discharge port formed at the bottom. The dust collecting assembly includes a connecting plate, a busbar and an ash discharge port connected in sequence from top to bottom. The connecting plate includes an inverted trapezoidal fifth connecting plate arranged opposite to each other on the left and right, and a rectangular sixth connecting plate arranged opposite to each other on the front and back, wherein a conical groove is provided on the top edge of the fifth connecting plate to adapt to the conical structure on the left and right sides of the first mounting groove 28. The fifth connecting plate and the sixth connecting plate are arranged in an enclosed manner, and the bottom edges of the fifth connecting plate and the sixth connecting plate extend downward to form an inverted trapezoidal busbar. The bottoms of the busbars are connected and enclosed to form a ring-shaped ash discharge port, and a guide groove is formed between the busbars, so that the dust falling into the dust collecting assembly gathers in the guide groove, thereby accelerating its movement to the downward ash discharge port.

[0072] Furthermore, the automatic ash discharge device 500 includes an ash discharge valve body assembly 100 and an ash discharge control assembly 200. The ash discharge valve body assembly 100 is arranged at the ash discharge port at the bottom of the dust collecting assembly. 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. Figure 3 and Figure 4 As shown, the ash discharge valve body assembly 100 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 100 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 downwardly. 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 100.

[0073] Specifically, such as Figure 8 and Figure 9 As 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.

[0074] 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, to avoid 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.

[0075] 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.

[0076] 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 500 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 500, 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.

[0077] 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.

[0078] like Figure 8 and Figure 10 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 200 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] 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.

[0089] like Figure 11 and Figure 12 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.

[0090] 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 tenth side wall 132 vertically arranged at the bottom of the ninth side wall 132. Side wall 133, an air duct 131 is set in the bottom of the tenth side wall 133, 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 channel running through the upper and lower parts is formed in the middle of the valve core 130, when the ash discharge control component 200 is closed, dust accumulates inside it. After the ash discharge control component 200 is opened, the air duct 131 at the bottom of the valve core 130 sprays gas downward to blow open the ash 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.

[0091] Specifically, the ninth side wall 132 is enclosed around the first axis to form a first chamber that is through from top to bottom, and the tenth side wall 133 is enclosed around the first axis to form a second chamber that is through from top to bottom, and the longitudinal height of the first chamber is greater than the longitudinal height of the second chamber. Since the first chamber has a larger volume as a whole, 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 100 that is close to the negative pressure environment and perpendicular to the negative pressure environment will be discharged downwards first. The first chamber is located in the position of preferential downward discharge, so increasing the volume of the first chamber is conducive to maximizing the total amount of dust discharged per unit time.

[0092] 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, so that the dust flows downward smoothly in sequence, 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 parallel to the first axis in the longitudinal direction, 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 the greatest. The second chamber is vertically downward to promote 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 second chamber after the dust discharge control component 200 is turned on.

[0093] 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 200 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.

[0094] 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 100.

[0095] 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 discharge device 500 to improve the working efficiency of the automatic ash discharge device 500.

[0096] Specifically, such as Figure 13 As 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.

[0097] 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.

[0098] 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.

[0099] 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 200 is just turned on, the gas pressure reaches a peak value, which is 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.

[0100] 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 200 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 500 to have a longer jet time, which is equivalent to saving gas in the air pump and increasing the working efficiency of ash discharge.

[0101] 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.

[0102] 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.

[0103] 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.

[0104] 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.

[0105] 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.

[0106] 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.

[0107] 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.

[0108] 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 200 is closed, thereby improving the ash discharge efficiency.

[0109] 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.

[0110] 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.

[0111] 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.

[0112] like Figure 14 As 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.

[0113] 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.

[0114] 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.

[0115] 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 400. The height of the nozzle 145 is set to 2cm to 5cm.

[0116] 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.

[0117] Further, if Figure 2 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 100 is installed at the ash discharge port at the bottom of the dust collecting assembly, and the ash discharge control assembly 200 is arranged in the installation chamber of the containing cover. The ash discharge control assembly 200 is connected to the ash discharge valve body assembly 100 and is used to control the opening and closing of the ash discharge valve body assembly 100.

[0118] Furthermore, the ash discharge control assembly 200 in the automatic ash discharge device 500 includes a pneumatic pipeline and a control valve disposed in the middle of the pneumatic pipeline. The pneumatic pipeline has one end connected to the air pump and the other end connected to the air inlet of the ash discharge valve body assembly 100. Gas output by the air pump is output to the air inlet and the air inlet pipe through the pneumatic pipeline. The control valve of the ash discharge control assembly 200 can have various configurations, such as a mechanical valve, a solenoid valve, and a controller.

[0119] Specifically, the ash discharge control component 200 also includes a control module, which monitors external gas source pressure or time and other parameters through sensors and PLC, controls the gas on and off in the pneumatic pipeline, and thereby realizes the control of the start and stop of the ash discharge valve body component 100.

[0120] 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 predetermined 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 100, and the ash discharge valve body assembly 100 does not operate; when the air pressure in the external air source reaches the predetermined 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 100 through the pneumatic pipeline to realize automatic operation of the ash discharge valve body assembly 100.

[0121] 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 100 through the pneumatic pipeline to realize the automatic operation of the ash discharge valve body assembly 100; 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 100, and the ash discharge valve body assembly 100 does not operate.

[0122] Furthermore, the response priority for the solenoid valve opening duration reaching a preset value is higher than the response priority for 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 100 from operating for a long time due to 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 reopened to prevent the ash discharge valve body assembly 100 from continuing to operate due to the air pressure in the external air source being higher than the preset value for a long time.

[0123] 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 from the external air source flows into the ash discharge valve body assembly 100 through the pneumatic pipeline, thereby realizing automatic operation of the ash discharge valve body assembly 100. 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 from the external air source cannot enter the ash discharge valve body assembly 100, and the ash discharge valve body assembly 100 does not operate.

[0124] 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 400, or an air compressor, an air storage tank, etc.

[0125] 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.

[0126] 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.

[0127] 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. A composite filtering device, characterized in that: It includes a filter element, a cyclone component and a dust collecting component. A sealing shell is provided on the outside of the filter element. The top of the cyclone component is connected to the sealing shell to form a confluence chamber between the filter element and the cyclone component. The air filtered by the cyclone component enters the filter element upward through the confluence chamber. The bottom of the cyclone component is connected to the dust collecting component to form a dust collecting chamber. An ash discharge port is formed at the bottom of the dust collecting chamber. The ash discharge port is connected to an automatic ash discharge device so that the separated dust falls into the dust collecting chamber and is automatically discharged.

2. The composite filtering device according to claim 1, wherein: The cyclone assembly includes an upper support plate and a plurality of cyclone tubes arranged on the upper support plate. The upper support plate includes a plate surface and a dust return area formed at the bottom of the plate surface. The dust return area is connected to the cyclone tubes. The plate surface is inclined from top to bottom toward the dust return area to guide the impurities on the plate surface to gather along the plate surface to the dust return area and then fall into the dust collecting chamber through the cyclone tubes.

3. The composite filtering device according to claim 2, characterized in that: The upper support plate includes two plates, which are arranged to be inclined relative to each other. The dust return area is located at the connection of the two plates. At least one row of swirl tubes is arranged below the dust return area. The swirl tubes include an upper tube and a lower tube. The air outlet on the upper tube is connected to the dust return area.

4. The composite filtering device according to claim 3, characterized in that: A funnel-shaped outlet side wall is provided on the outlet connected to the dust return area to increase the area connected between the outlet and the dust return area. The outlet side walls are arranged tangentially so that all impurities collected in the dust return area can enter the cyclone tube.

5. The composite filtering device according to claim 4, characterized in that: The swirl assembly also includes a lower support plate. The lower tube of the swirl tube is connected to the lower support plate. The dust outlet on the lower tube is connected to the dust collecting assembly. The upper tube and the lower tube are sleeved together. The setting height of the swirl tube gradually decreases from the front and rear ends to the middle direction. The lower support plate is tilted downward from the front and rear ends to the middle direction.

6. The composite filtering device according to claim 5, characterized in that: The dust collecting assembly includes a fifth connecting plate arranged opposite to each other on the left and right, and a sixth connecting plate arranged opposite to each other front and back. A conical groove is provided on the top edge of the fifth connecting plate. The fifth connecting plate and the sixth connecting plate are arranged in an enclosed manner. The bottom edges of the fifth connecting plate and the sixth connecting plate extend downward to form an inverted trapezoidal busbar. The bottom of the busbar is connected and enclosed to form an ash discharge port. A guide groove is formed between the busbars, so that dust falling into the dust collecting assembly is gathered in the guide groove.

7. The composite filtering device according to any one of claims 1 to 6, characterized in that: The ash discharge valve body assembly on the automatic ash discharge device includes a detachably connected shell and a valve core, the upper end of the shell is connected to the dust discharge port of the discharge assembly, and the lower end of the shell is connected to the ash discharge nozzle. The valve core is arranged 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 duct is provided on the tenth side wall, and an air inlet connected to the air cavity is provided on the shell.

8. The composite filtering device according to claim 7, wherein: The shell includes a detachably connected valve body cover and an adapter, the lower end of the valve core abuts against the abutment on the valve body cover, the upper end of the valve core abuts against the lower end of the adapter, and the upper end of the adapter is connected to the dust collection unit to fix the valve core in the valve body cover. A third connecting piece is provided on the valve body cover, and a second boss is formed on the third connecting piece. The lower end of the valve core abuts against the second boss. 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. The air duct is integrally formed and is set at the bottom of the tenth side wall. It is tilted in a direction from top to bottom and gradually approaches 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.

9. The composite filtering device according to claim 8, characterized in that: The air duct includes an upper port and a lower port, the upper port is arranged on the outside of the tenth side wall, the lower port is arranged at the bottom of the tenth side wall, the guide wall includes a seventh side wall and an eighth side wall arranged below the seventh side wall, the seventh side wall is inclined from top to bottom toward the central axis of the shell, the eighth side wall is vertically arranged, the height of the eighth side wall is less than the height of the seventh side wall, the valve body cover includes a sixth side wall, the third connecting piece includes an outer ring end and an inner ring end, the inner ring end is connected to the guide wall, the outer ring end is connected to the sixth side wall, the ash discharge nozzle is detachably connected to the sixth side wall, and the valve body cover is provided There is a second connecting member, and 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, and the third flange abuts against the first boss. The outer cover of the valve body is a hollow structure with two 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 horizontal direction. The fifth side wall is gradually arranged toward the central axis of the outer cover of the valve body from top to bottom, and is spaced from 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.

10. The composite filtering device according to claim 9, characterized in that: The upper portion of the second connecting piece is connected to the third side wall, and the third side wall is detachably connected to the adapter. A fourth flange is longitudinally extended upwardly from the top of the ninth side wall of the valve core, and the lower end of the adapter abuts against the fourth flange. A first sealing groove is formed between the lower end of the adapter and the third side wall, the third flange, and the fourth flange. The adapter is a hollow structure with two through-holes, including a first side wall, a second side wall and a first connecting piece. The circumferential sizes of the first side wall and the second side wall are different. One end of the first connecting piece 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 dust collection unit, and the bottom of the second side wall is connected to the valve body outer cover. The adapter includes a first flange, and the first flange is connected to the first connecting piece The ninth side wall of the valve core is connected to the fourth side wall of the valve body outer cover to form a first angle, and the tenth side wall of the valve core is connected to the fifth side wall of the valve body outer cover to form a second angle. The air channel is arranged near the tip of the second angle, and the first angle and the second angle are set as acute angles. The upper end of the ninth side wall of the valve core and the lower end of the tenth side wall 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. The ninth side wall of the valve core encloses a first chamber, and the first chamber is arranged in an inverted cone shape. The tenth side wall encloses a second chamber, and the second chamber is columnar. The height of the tenth side wall is less than that of the ninth side wall.

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