Mesh cover cleaning assembly

Abstract

The utility model discloses a mesh enclosure cleaning assembly which is used for cleaning an air inlet mesh enclosure of an air pre-purification device and comprises a cleaning ring, an air channel is formed in the cleaning ring and communicated with an external air source, the cleaning ring is provided with air blowing holes facing the air inlet mesh enclosure, the external air source introduces air into the air channel, and the air blowing holes are communicated with the air inlet mesh enclosure. And the air is sprayed to the air inlet mesh enclosure through the air blowing holes so as to clean impurities on the air inlet mesh enclosure. The mesh enclosure cleaning assembly can automatically clean impurities attached to the outer portion of the mesh enclosure, the cleaning process is rapid and effective, and installation is convenient. The mesh enclosure cleaning assembly is small in overall occupied space, convenient to maintain and repair and high in adaptability to the air pre-purification device.

Description

Technical Field

[0001] The utility model relates to the field of engine air intake filtration, in particular to a mesh cleaning component in an air pre-purification 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] Since air pre-purification devices often operate in harsh environments with high dust and impurity content, in order to prevent large particles of impurities from being directly inhaled and causing blockage of the cyclone tube in the pre-purification device, a mesh cover is usually set on the outside of the cyclone tube. The larger particles of impurities are first filtered and blocked through the mesh holes on the mesh cover, and then the smaller particles of dust are further filtered through the cyclone tube.

[0005] However, for vehicles or construction machinery with large engine intake suction, large particles of impurities will be continuously adsorbed and accumulated on the outside of the mesh cover under continuous air intake, thereby causing blockage of the mesh cover and affecting the normal operation of the air pre-purification device. Utility Model Content

[0006] The purpose of this utility model is to provide a mesh cleaning assembly for cleaning the mesh of an air pre-purification device. The specific technical solution is as follows:

[0007] A mesh cleaning assembly is used to clean the air intake mesh of an air pre-purification device, including a cleaning ring, an air duct formed inside the cleaning ring, and the air duct is connected to an external air source. The cleaning ring is provided with blowing holes facing the air intake mesh. The external air source passes gas into the air duct and sprays the gas onto the air intake mesh through the blowing holes to clean impurities on the air intake mesh.

[0008] Furthermore, a cleaning ring is arranged around the top of the air inlet mesh cover, and a blowing hole is opened on the bottom surface of the cleaning ring to spray gas from top to bottom onto the air inlet mesh cover.

[0009] Furthermore, a cleaning ring is arranged around the bottom of the air inlet mesh cover, and a blowing hole is opened on the top surface of the cleaning ring to spray gas onto the air inlet mesh cover from bottom to top.

[0010] Furthermore, the cleaning ring is arranged around the outer side of the air inlet mesh cover, and the blowing holes spray the gas to the outer side of the air inlet mesh cover.

[0011] Furthermore, a fixing piece is sleeved on the cleaning ring, and the fixing piece is connected to the air pre-purification device to fix the cleaning ring on the air pre-purification device.

[0012] Furthermore, it includes a control component, which includes an external air source, a control module and a pneumatic pipeline. The two ends of the pneumatic pipeline are respectively connected to the external air source and the cleaning ring. The control module is set on the pneumatic pipeline. The control module can control the on and off of the pneumatic pipeline to open or close the cleaning ring.

[0013] Furthermore, a mechanical valve for controlling the on-off of the pneumatic pipeline is provided in the control module. The mechanical valve is set with a predetermined air pressure value. When the air pressure in the external air source reaches the predetermined value of the mechanical valve, the mechanical valve automatically opens.

[0014] Furthermore, a solenoid valve for controlling the on and off of the pneumatic pipeline is provided in the control module. The control module can monitor at least one parameter among the air pressure in the external air source, the opening time of the solenoid valve, the closing time of the solenoid valve, the throttle opening of the power machinery and the engine speed to control the opening and closing of the solenoid valve.

[0015] Furthermore, the control module monitors the air pressure in the external air source, the opening time and closing time of the solenoid valve. When the solenoid valve is controlled to be closed, the response priority of the opening time of the solenoid valve is higher than the response priority of the air pressure value in the external air source.

[0016] Furthermore, the pneumatic pipeline includes a main pipeline, a first branch and a second branch. One end of the main pipeline is connected to the air pump, and the other end is connected to the first branch and the second branch respectively. The first branch is connected to the dust discharge valve body assembly in the air pre-purification device, and the second branch is connected to the cleaning ring. A first control valve is provided on the first branch, and a second control valve is provided on the second branch. The first control valve and the second control valve respectively control the on and off of the gas transported in the first branch and the second branch.

[0017] The utility model can automatically clean impurities attached to the outside of the mesh, and the cleaning process is fast and effective, and it is easy to install. The mesh cleaning assembly takes up little space, is easy to maintain and repair, and is highly compatible with air pre-purification devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an overall schematic diagram of the air pre-purification device in the utility model.

[0019] Figure 2 It is a cross-sectional view of the air pre-purification device in the utility model.

[0020] Figure 3 This is an exploded view of the air pre-purification device in the utility model.

[0021] Figure 4 This is an exploded view of the swirl component in the present invention.

[0022] Figure 5 It is a structural schematic diagram of the cleaning ring in the utility model.

[0023] Figure 6 This is a structural schematic diagram of another embodiment of the cleaning ring in the present invention.

[0024] Figure 7 This is a structural schematic diagram of another embodiment of the cleaning ring in the present utility model. DETAILED DESCRIPTION

[0025] In order to better understand the purpose, structure and function of the present invention, the air pre-purification device of the present invention is described in detail below with reference to the accompanying drawings.

[0026] like Figures 1 to 4 As shown, the air pre-purification device includes a cyclone assembly 10, a confluence assembly 20, a dust collection assembly 30, an air outlet pipe 90, and an automatic dust discharge device. The confluence assembly 20 is located above the cyclone assembly 10 and is connected to the air outlet end 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 14 of the cyclone assembly 10. The automatic dust discharge device 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 is arranged to penetrate the cyclone assembly 10 in the vertical direction. The upper end of the air outlet pipe 90 is connected to the confluence assembly 20, and the lower end of the air outlet pipe 90 passes through the dust collection assembly 30 and is connected to the air intake of the engine.

[0027] As a result, air containing dust and impurities enters the cyclone assembly 10 and undergoes cyclonic motion. Impurity particles spiral downward, passing through the dust outlet 14 of the cyclone assembly 10 and falling into the dust collection assembly 30. The purified air spirals upward, passing through the air outlet 13 of the cyclone assembly 10 and entering the confluence assembly 20, before flowing toward the engine through the air outlet pipe 90. The cyclone assembly 10 preferably includes multiple cyclone tubes 17 arranged side by side. The greater the number of cyclone tubes 17, the greater the air intake volume of the air pre-purifier and the higher the purification efficiency.

[0028] Further, if Figure 2 and Figure 3As shown, the outlet pipe 90 is disposed near the sides of the cyclone assembly 10 and the dust collection assembly 30, so that the multiple cyclone tubes 17 in the cyclone assembly 10 are concentrated on the same side of the outlet pipe 90, and the ash collection basin 32 in the dust collection assembly 30 are concentrated on the same side of the outlet pipe 90. The phrase "concentrated on the same side of the outlet pipe" specifically means that at least a portion of the sidewall of the outlet pipe 90 is located outside the cyclone assembly 10 and the ash collection basin 32. In this case, the cyclone assembly 10 and the ash collection basin 32 are both concentrated on the side corresponding to the other portion of the sidewall of the outlet pipe 90.

[0029] With this arrangement, the space for accommodating dust in the ash collecting basin 32 can be better concentrated, and the ash discharge operation of the ash collecting basin 32 is also more convenient. Specifically, the ash collecting basin 32 as a whole can be set to a shape similar to a funnel, and a single lowest point is formed at the bottom of the ash collecting basin 32. An ash discharge port 31 is opened at the lowest point, and the dust in the ash collecting basin 32 is gathered toward the lowest point and discharged centrally through the ash discharge port 31. An automatic ash discharge device can be set at the ash discharge port 31 to automatically discharge the dust in the ash basin. A ash discharge structure that can be manually opened or closed, such as a screw cover or a flip cover, can also be set. When the dust in the ash collecting basin 32 accumulates to a certain amount, the ash is discharged by opening the cover at the ash discharge port 31. Since the ash collecting basin 32 is centrally arranged on the same side of the air outlet pipe 90, a single ash discharge port 31 for centralized ash discharge can be formed on the ash collecting basin 32. When discharging ash, only one ash discharge port 31 needs to be opened and closed, which simplifies the ash discharge operation.

[0030] In addition, the ash collecting basin 32 is centrally arranged on the same side of the outlet pipe 90, which makes it easier to set the ash collecting basin 32 in a detachable form. Not only is the ash collecting space of the ash collecting basin 32 centrally arranged, but at the same time, while keeping the outlet pipe 90 connected to the engine air intake end, the ash collecting basin 32 as an integral structure can be directly removed from the lower part of the swirl assembly 10 and separated from the outlet pipe 90, which also makes the ash discharge operation more convenient.

[0031] Specifically, such as Figure 3 and Figure 4As shown, the swirl assembly 10 includes an upper plate 11 and a lower plate 12. The inner tube 15 of the swirl tube 17 is connected to the bottom of the upper plate 11, and the air outlet end 13 of the inner tube 15 is connected to the space above the upper plate 11. The outer tube 16 of the swirl tube 17 is connected to the top of the lower plate 12, and the dust outlet end 14 of the outer tube 16 is connected to the space below the lower plate 12. The inner tube 15 can be connected to the upper plate 11 separately or integrally, and the outer tube 16 can be connected to the lower plate 12 separately or integrally. The connecting end of the inner tube 15 extends into the connecting end of the outer tube 16, connecting to the outer tube 16, and forming an air inlet of the swirl tube 17 at the connection, and the air inlet is provided with swirl blades. An upper cover is sealed above the upper plate 11 , and the upper cover and the upper plate 11 together form a confluence assembly 20 to collect the clean air purified by the cyclone tube 17 and send it into the outlet pipe 90 ; the dust collecting assembly 30 is sealed below the lower plate 12 .

[0032] Furthermore, the air outlet pipe 90 is composed of an upper pipe 91 and a lower pipe 92. Figure 4 As shown, the upper tube 91 and the inner tubes 15 of the multiple vortex tubes 17 are integrally formed with the upper plate 11, and the upper tube is offset and arranged on one side of the upper plate 11 so that the inner tubes 15 of the multiple vortex tubes 17 are concentrated on the same side of the upper tube; the lower tube 92 and the outer tubes 16 of the multiple vortex tubes 17 are integrally formed with the lower plate 12, and the lower tube is offset and arranged on one side of the lower plate 12 so that the outer tubes 16 of the multiple vortex tubes 17 are concentrated on the same side of the lower tube.

[0033] A fixing component is provided between the upper tube 91 and the lower tube 92 of the air outlet pipe 90. When assembling the swirl component 10, the one-piece upper plate 11 is directly buckled on the one-piece lower plate 12, so that the upper tube 91 and the lower tube 92 of the air outlet pipe 90 are opposite to each other and connected to each other, so that the inner tube 15 of each swirl tube 17 extends into the corresponding outer tube 16, and then the fixing component is tightened to complete the assembly process of the swirl component 10. One end of the assembled air outlet pipe 90 is connected to the air outlet end 13 of the swirl tube 17 for discharging purified air, and the other end is connected to the engine air intake.

[0034] During use, the air pre-purifier of the present invention has its outlet pipe 90 fixedly connected to the engine's air intake. This serves to secure the entire air pre-purifier, significantly impacting the overall structural strength, connection stability, and operational stability of the device. The aforementioned integrated design ensures stable connections between the outlet pipe 90 and the swirl assembly 10, confluence assembly 20, and dust collection assembly 30, even when the outlet pipe 90 is offset and the swirl tube 17 and ash collection basin 32 are centrally located. This enhances the overall structural strength of the air pre-purifier and further ensures its installation and operational stability.

[0035] Furthermore, the integrated design simplifies the installation process for connecting the outlet pipe 90 and the swirl assembly 10. The outlet pipe 90, upper plate 11, and lower plate 12 only require a single sealing surface, significantly improving the overall sealing performance of the device. Preferably, a sealing ring is provided at the connection between the upper tube 91 and the lower tube 92 to further enhance the sealing performance.

[0036] Further, if Figures 3 and 4 As shown, the multiple cyclone tubes 17 in the cyclone assembly 10 are arranged in a semicircular shape around the air outlet pipe 90. This arrangement is conducive to fully utilizing the space of the cyclone assembly 10, increasing the number of cyclone tubes 17 in the cyclone assembly 10, and thus improving the air purification efficiency.

[0037] The ash collecting basin 32 is detachably connected to the bottom of the cyclone assembly 10. A groove structure 33 with a single-side opening is formed on the ash collecting basin 32. The outlet pipe 90 can be inserted into the groove structure 33 through the opening, so that the ash collecting basin 32 and the outlet pipe 90 can be embedded in each other without hindering the detachment of the ash collecting basin 32 and the outlet pipe 90. The ash collecting basin 32 is provided with extensions on both sides of the groove structure 33. The extensions are extended toward the side walls of the outlet pipe 90 to increase the area of the upper opening of the ash collecting basin 32, so that the ash collecting basin 32 can be arranged corresponding to a larger number of cyclone tubes 17 in the cyclone assembly 10. On the one hand, by cooperating with the cyclone assembly 10, the air purification efficiency is improved. On the other hand, the volume of the ash collecting basin 32 can be increased to accommodate more dust.

[0038] In the present invention, the air pre-purification device as a whole can be set to a rectangular structure or an octagonal structure. In addition, the air pre-purification device as a whole can also be set to a circular or other polygonal structure according to actual needs such as installation space. For the above-mentioned situation where the outlet pipe 90 is offset and the ash collecting basin 32 and the swirl assembly 10 are centrally arranged, it is more advantageous to set the air pre-purification device as a whole to a rectangular or polygonal structure. Specifically, the outlet pipe 90 is set close to the middle position of one of the side edges of the swirl assembly 10. At this time, there is more space on the left and right sides of the outlet pipe 90 for arranging the swirl tube 17. When the swirl assembly 10 occupies the same space, it is more conducive to increasing the number of swirl tubes 17 arranged and improving the filtration efficiency. At the same time, the center of gravity of the swirl assembly 10 as a whole can be closer to the outlet pipe 90, further enhancing the stability of the overall structure of the air pre-purification device.

[0039] Of course, in addition to the above-mentioned preferred embodiments, the air outlet pipe 90 can also be set at the top corner of the rectangular or polygonal cyclone component 10, or set close to the circumference of the circular cyclone component 10. At the same time, the shape of the ash collecting basin 32 is set accordingly, which can basically achieve the technical effect achieved by the utility model.

[0040] Specifically, such as Figure 3 As shown, the ash collecting basin 32 includes an upper wall and a lower wall. The upper wall is formed into an octagon by the upper wall surface, and the upper wall close to the air outlet pipe 90 is recessed toward the middle of the ash collecting basin 32 to form a tubular chamber that can accommodate the air outlet pipe 90. The lower wall is composed of four lower wall surfaces that are inclined and converge toward the ash discharge port 31. The top of the lower wall surface is connected to the upper wall surface, and the connection between the left and right sides of the lower wall surface forms an angle, so that the dust and impurities falling into the ash collecting basin 32 are gathered toward the ash discharge port 31 along the groove formed by the angle.

[0041] On the one hand, the above-mentioned setting method can make the upper part of the ash collecting basin 32 have an opening area as large as possible to correspond to more dust outlet ends 14, that is, increase the steam intake of the air pre-purification device. On the other hand, it can make the dust and impurities in the ash collecting basin 32 be discharged more directly and fully, reducing the dead corners where impurities may remain.

[0042] Preferably, the center point of the ash discharge port 31 below the ash collecting basin 32 is located on the lower wall surface on the front side, so that the ash discharge port 31 as a whole is more inclined to be set on the lower wall surface close to the front side. This setting method can further increase the area of the opening above the ash discharge port 31 to facilitate dust to enter the ash discharge port 31.

[0043] Furthermore, when the ash basin 32 is installed at the bottom of the cyclone assembly 10, it must align with the dust outlet ends 14 of the cyclone tubes 17, ensuring that the dust outlet ends 14 of all cyclone tubes 17 are contained within the upper opening of the ash basin 32. Furthermore, a sealed connection between the ash basin 32 and the cyclone assembly 10 is required. To this end, a first sealing structure for sealing the connection and a positioning structure for facilitating quick alignment and installation of the ash basin 32 are provided between the ash basin 32 and the cyclone assembly 10.

[0044] Specifically, the mating mounting structure between the ash basin 32 and the swirl assembly 10 can take various forms. For example, a mounting groove can be provided on the lower plate 12, and the upper edge of the ash basin 32 can be inserted into the corresponding mounting groove to achieve the mounting connection of the ash basin 32. Preferably, a sealing strip is also provided on the lower plate 12 of the swirl assembly 10. The sealing strip is located in the annular mounting groove and corresponds to the upper edge of the ash basin 32. When the ash basin 32 is installed on the lower plate 12, the sealing strip is located exactly at the location where the basin body and the lower plate 12 are connected, thereby enhancing the sealing effect between the ash basin 32 and the swirl assembly 10.

[0045] Further, if Figures 1 to 2As shown, the mesh cover 41 is disposed around the periphery of the cyclone assembly 10, located between the confluence assembly 20 and the dust collection assembly 30, to protect the cyclone tube 17 in the cyclone assembly 10. Specifically, a first annular mounting groove is provided at the edge of the upper plate 11, and a second annular mounting groove is provided at the edge of the lower plate 12. The upper edge of the annular mesh cover is embedded in the first mounting groove, and the lower edge is embedded in the second mounting groove, so that the mesh cover is stably installed outside the cyclone assembly 10.

[0046] Further, if Figures 1 to 3 As shown, the air pre-purification device of the present invention further includes a screen cleaning assembly 50, which can clean impurities (especially large particles) attached to the outside of the screen. The screen cleaning assembly 50 includes a cleaning ring 51, which is fixedly mounted on the top of the swirl assembly 10 and is located outside the screen 41 to clean large particles of impurities blocked outside the screen.

[0047] Specifically, the cleaning ring 51 is a hollow tubular structure. According to the octagonal swirl assembly 10 of this embodiment, the cleaning ring 51 is also configured as an octagonal ring structure to fit the periphery of the mesh cover 41. One side of the cleaning ring 51 is connected to the air inlet pipe 52. A plurality of air holes 53 are provided on the bottom surface of the cleaning ring 51. Pressurized gas is introduced from the air inlet pipe 52 into the cleaning ring 51. After quickly filling the cleaning ring 51, the gas is discharged downwardly from the air holes 53. This exerts downward gas pressure on large impurities adsorbed on the outside of the mesh cover 41. Since these large impurities are adsorbed on the outside of the mesh cover 41 by the lateral suction force of the air inlet, the downward airflow from the air holes 53 intersects with the airflow from the air inlet. That is, the downward airflow blows into the gap between the large impurities and the mesh cover 41, preventing the large impurities from being adsorbed by the suction force of the air inlet and causing them to fall, thereby automatically cleaning the large impurities on the outside of the outer cover.

[0048] Correspondingly, four fixing parts 54 are provided on the cleaning ring 51, and a connecting plate is provided above the fixing part 54, which is fixed to the outer side of the top of the upper plate of the swirl assembly 10 by bolts. Of course, other clamps, snap-fits, plug-in or one-piece molding methods can also be used, as long as the effect of connecting the cleaning ring and the swirl assembly can be achieved.

[0049] Compared to a one-piece design, the split-type cleaning ring in this embodiment offers greater flexibility, allowing users or manufacturers to configure it to meet specific functional requirements. Furthermore, the split-type cleaning ring can be directly installed on existing air pre-purifiers, allowing for direct upgrades to existing products. Furthermore, the existing molds can be reused, eliminating the need to create new molds for new air pre-purifiers, thus reducing production costs.

[0050] Furthermore, a hollow slot is provided at the bottom of the fixing member 54 to avoid blocking the air blowing hole 53 provided at the fixing member from exhausting air downward.

[0051] It is understood that those skilled in the art can, according to actual needs, arrange the cleaning ring at the bottom of the lower plate of the swirl assembly, i.e., at a position that fits the bottom of the screen, and accordingly, open an air hole at the top of the cleaning ring to exhaust upwards, or blow pressurized gas into the gap between the large particle impurities and the screen, thereby separating the large particle impurities from the screen. Of course, the cleaning ring can also be arranged in the middle of the screen, and accordingly, open air holes at the top and bottom of the cleaning ring to exhaust upwards and downwards simultaneously. In addition, two or more cleaning rings can also be arranged simultaneously in different areas of the screen.

[0052] Further, if Figure 5 As shown, in order to make the cleaning ring 51 have a stronger cleaning ability, it is preferred to set the cleaning ring 51 to the same octagonal shape as the mesh cover 41 to improve the fit between the cleaning ring 51 and the mesh cover 41, thereby enhancing the cleaning effect. Figure 6 and Figure 7 As shown, when the mesh cover of the air pre-purification device is in other shapes such as circular or rectangular, the cleaning ring 51 can also be adaptively set to be in a circular or rectangular shape.

[0053] Preferably, the air holes on the cleaning ring 51 are arranged at equal intervals so that the gas charged into the air inlet pipe is evenly distributed within the cleaning ring and then discharged downward at equal gas pressure. Since the suction force gradually increases near the cyclone tube air inlet, the distance between the air holes is equivalent to the diameter of the cyclone tube air inlet, so that there is at least one air hole above each cyclone tube air inlet. This allows the high-pressure gas discharged from the air holes to be in the maximum suction area of the cyclone tube air inlet, and quickly sprayed into the gap between large impurities and the mesh cover to blow off the large impurities, thereby achieving the effect of accurately and efficiently cleaning large impurities.

[0054] Further, if Figure 1 and Figure 3 As shown, when an automatic ash discharge device is used for ash discharge, a housing is further provided on the ash collection basin 32, with an installation chamber formed therein. The automatic ash discharge device includes an ash discharge valve assembly and an ash discharge control assembly. The ash discharge valve assembly is mounted at the ash discharge port at the bottom of the dust collection unit, and the ash discharge control assembly is disposed in the installation chamber of the housing. The ash discharge control assembly is connected to the ash discharge valve assembly to control the opening and closing of the ash discharge valve assembly.

[0055] Furthermore, the ash discharge control assembly in the automatic ash discharge device includes a pneumatic pipeline and a control valve arranged in the middle of the pneumatic pipeline. The pneumatic pipeline includes a main pipeline, a first branch, and a second branch. One end of the main pipeline is connected to the air pump, and the other end is divided into two, connected to the first branch and the second branch respectively. The first branch is connected to the air inlet of the ash discharge valve body assembly, and the second branch is connected to the air inlet pipe of the cleaning ring. The gas output by the air pump is output to the air inlet and the air inlet pipe through the pneumatic pipeline. A first control valve is provided on the first branch, and a second control valve is provided on the second branch, which are used to control the on-off of the gas transported in the first branch and the second branch, respectively. Among them, the control valve of the ash discharge control assembly can have a variety of setting structures, such as a mechanical valve, a solenoid valve, and a controller.

[0056] Specifically, the ash discharge control component also includes a first control module and a second control module, which are respectively arranged on the first branch and the second branch. The first control module and the second control module monitor the external gas source pressure or time and other parameters through sensors and PLCs, and control the gas on and off in the pneumatic pipeline, thereby realizing the control of the start and stop of the ash discharge valve body assembly.

[0057] Preferably, only one of the first and second control modules is activated. That is, when the first control module is activated, the second control module is deactivated, and vice versa. This prevents the ash discharge valve assembly and the cleaning ring from being activated simultaneously, thereby ensuring that the external air source always maintains sufficient gas pressure and ensures efficient ash discharge. Furthermore, the first and second control modules can be activated alternately to prevent either one from being activated continuously, which could lead to excessive accumulation of dust and impurities within the ash discharge valve assembly or outside the mesh cover.

[0058] Preferably, the control module includes a mechanical valve installed on the pneumatic pipeline. When the air pressure in the external air source does not reach the preset value of the mechanical valve, the mechanical valve remains closed, the gas in the external air source cannot enter the ash discharge valve body assembly or the cleaning ring, and the ash discharge valve body assembly or the cleaning ring does not operate; when the air pressure in the external air source reaches the preset value of the mechanical valve, the mechanical valve automatically opens, and the gas in the external air source flows into the ash discharge valve body assembly or the cleaning ring through the pneumatic pipeline to realize automatic operation of the ash discharge valve body assembly or the cleaning ring.

[0059] Preferably, the control module includes a solenoid valve installed on the pneumatic pipeline, and a controller connected to the solenoid valve. The controller controls the opening and closing of the solenoid valve by monitoring the air pressure value in the external air source, the opening time of the solenoid valve, and the closing time. When the air pressure value in the external air source is monitored to reach a preset value, the controller controls the solenoid valve to open, and the gas in the external air source flows into the ash discharge valve body assembly or the cleaning ring through the pneumatic pipeline to realize the automatic operation of the ash discharge valve body assembly or the cleaning ring; when the air pressure value in the external air source is monitored to be lower than the preset value, or when the opening time of the solenoid valve is monitored to reach a preset value, the controller controls the solenoid valve to close, and the gas in the external air source cannot enter the ash discharge valve body assembly or the cleaning ring, and the ash discharge valve body assembly or the cleaning ring does not operate.

[0060] Furthermore, the response priority of the solenoid valve opening duration reaching a preset value is higher than the response priority of the air pressure in the external air source falling below a preset value. That is, even if the air pressure in the external air source is not lower than the preset value, but the solenoid valve opening duration has reached the preset value, the pneumatic pipeline is still closed to prevent the ash discharge valve body assembly or the cleaning ring from operating for a long time, resulting in insufficient pressure in the external air source, thereby affecting the working efficiency of the external air source. At the same time, after the pneumatic pipeline is closed, it is necessary to monitor the air pressure in the external air source and the closing duration to reach the preset values before the solenoid valve can be opened again to prevent the ash discharge valve body assembly or the cleaning ring from continuing to operate due to the external air source pressure being higher than the preset value for a long time.

[0061] Preferably, the control module can also control the opening and closing of the solenoid valve according to the throttle opening or engine speed of the power machine. When it is detected that the throttle opening or engine speed of the power machine reaches a preset value, the control module controls the solenoid valve to open, and the gas in the external air source flows into the ash discharge valve body assembly or the cleaning ring through the pneumatic pipeline to realize the automatic operation of the ash discharge valve body assembly or the cleaning ring; when it is detected that the throttle opening or engine speed of the power machine is lower than the preset value, the controller controls the solenoid valve to close, and the gas in the external air source cannot enter the ash discharge valve body assembly or the cleaning ring, and the ash discharge valve body assembly or the cleaning ring does not operate.

[0062] In addition to the above-mentioned setting method, when the air pre-purification device does not adopt automatic ash discharge, but adopts general manual ash discharge methods such as screwing cover and flip cover for ash discharge operation, the cleaning ring can be directly connected to the air pump or external air source through the pneumatic pipeline, and a solenoid valve is set on the pneumatic pipeline. The opening and closing of the solenoid valve is controlled by the control module to connect or disconnect the air path connected to the cleaning ring.

[0063] 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.

[0064] 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.

[0065] 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 screen cleaning assembly for cleaning the air intake screen of an air pre-purification device, characterized in that: It includes a cleaning ring, an air channel is formed inside the cleaning ring, and the air channel is connected to the external air source. The cleaning ring is provided with a blowing hole facing the air inlet mesh cover. The external air source passes the gas into the air channel and sprays it onto the air inlet mesh cover through the blowing hole to clean impurities on the air inlet mesh cover.

2. The screen cleaning assembly according to claim 1, wherein: The cleaning ring is arranged around the top of the air inlet mesh cover, and the blowing holes are opened on the bottom surface of the cleaning ring to spray the gas from top to bottom onto the air inlet mesh cover.

3. The screen cleaning assembly according to claim 1, wherein: The cleaning ring is arranged around the bottom of the air inlet mesh cover, and the blowing holes are opened on the top surface of the cleaning ring to spray the gas onto the air inlet mesh cover from bottom to top.

4. The screen cleaning assembly according to any one of claims 1 to 3, wherein: The cleaning ring is arranged around the outer side of the air inlet mesh cover, and the blowing holes spray gas to the outer side of the air inlet mesh cover.

5. The screen cleaning assembly according to claim 1, wherein: A fixing piece is sleeved on the cleaning ring, and the fixing piece is connected to the air pre-purification device to fix the cleaning ring on the air pre-purification device.

6. The screen cleaning assembly according to claim 1, wherein: It includes a control component, which includes an external air source, a control module and a pneumatic pipeline. The two ends of the pneumatic pipeline are respectively connected to the external air source and the cleaning ring. The control module is set on the pneumatic pipeline. The control module can control the on and off of the pneumatic pipeline to open or close the cleaning ring.

7. The screen cleaning assembly according to claim 6, wherein: The control module is equipped with a mechanical valve that controls the on-off of the pneumatic pipeline. The mechanical valve is set with a preset air pressure value. When the air pressure in the external air source reaches the preset value of the mechanical valve, the mechanical valve automatically opens.

8. The screen cleaning assembly according to claim 6, wherein: The control module is equipped with a solenoid valve that controls the on and off of the pneumatic pipeline. The control module can monitor at least one parameter among the air pressure in the external air source, the opening time of the solenoid valve, the closing time of the solenoid valve, the throttle opening of the power machinery and the engine speed to control the opening and closing of the solenoid valve.

9. The screen cleaning assembly according to claim 8, wherein: The control module monitors the air pressure in the external air source, the opening time and closing time of the solenoid valve. When the solenoid valve is controlled to be closed, the response priority of the opening time of the solenoid valve is higher than the response priority of the air pressure value in the external air source.

10. The screen cleaning assembly according to claim 6, wherein: The pneumatic pipeline includes a main pipeline, a first branch and a second branch. One end of the main pipeline is connected to the air pump, and the other end is connected to the first branch and the second branch respectively. The first branch is connected to the ash discharge valve body assembly in the air pre-purification device, and the second branch is connected to the cleaning ring. A first control valve is provided on the first branch, and a second control valve is provided on the second branch. The first control valve and the second control valve respectively control the on and off of the gas transported in the first branch and the second branch.

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