Air filter element maintenance method and device

Abstract

The invention discloses an air filter element maintenance method and device, and belongs to the technical field of filtering devices.When the open end of an air filter element is blocked and high-pressure air is filled into an inner cavity of the air filter element, the high-pressure air enters the air filter element to be instantly expanded, the air pressure in the inner cavity of the air filter element is evenly distributed, and the maintenance efficiency is improved. An instant high pressure difference is formed inside and outside the air filter element; the high-pressure gas rushing into the inner cavity of the air filter element flows to the outside of the air filter element only through the filter material of the air filter element under the action of the instantaneous high pressure difference. A high pressure difference is formed inside and outside the filter element, so that high-pressure air filled into the air filter element maintenance device can be uniformly distributed inside the air filter element, the high pressure difference is formed, and dust particles attached to the outer surface of the air filter element are effectively washed off.

Description

Technical Field

[0001] The present invention belongs to the technical field of filtration devices, and particularly relates to a method and device for maintaining an air filter element. Background Art

[0002] With the widespread use of internal combustion engines, the consumption of air filter elements has also increased day by day. After being used for a period of time, the air filter element needs to be maintained (i.e., the dust attached to the air filter element is cleaned), so as to reduce the intake resistance and the cost of using the internal combustion engine at the same time.

[0003] The maintenance methods of air filter elements are mainly divided into two types: one is to directly carry out maintenance without disassembling the filter element; the other is to carry out maintenance after disassembling the filter element.

[0004] At present, the filter element after disassembly mainly relies on manual operation, that is, the cleaning personnel usually use compressed air to blow the inner and outer sides of the filter element. However, this method has many problems: during the blowing and cleaning process, dust is easily backfilled into the filter element, and the diffused dust will also cause harm to the cleaning personnel. At the same time, the cleaning efficiency is low and the cost is high.

[0005] Patent (application number: 202110851159.4) discloses an automatic filter element cleaning and maintenance device. In this device, a to-be-maintained air filter element is installed on a filter element installation tooling, and the bottom of the to-be-maintained air filter element is butted against the outlet of a diffuser nozzle, and air is blown through the diffuser nozzle to the bottom opening of the filter element to remove the dust on the surface of the filter element. Although this device can avoid the backfilling of dust into the filter element during the blowing and cleaning process and prevent the diffused dust from causing harm to the cleaning personnel, in the actual use process of the device, there is no obvious dust falling during each blowing, and the cleaning effect on the air filter element is not ideal. Summary of the Invention

[0006] In view of this, the present invention provides a method and device for maintaining an air filter element, which forms a high pressure difference inside and outside the filter element, so that the high-pressure air charged into the air filter element maintenance device can be evenly distributed inside the air filter element and form a high pressure difference, effectively flushing off the dust particles attached to the outer surface of the air filter element.

[0007] The present invention is realized by the following technical solutions:

[0008] An air filter element maintenance method, which seals the opening end of the air filter element, and when charging high-pressure air into the internal cavity of the air filter element, makes the high-pressure air instantaneously expand when it enters the inside of the air filter element, so that the air pressure distribution in the internal cavity of the air filter element is uniform, and an instantaneous high pressure difference is formed inside and outside the air filter element;

[0009] The high-pressure gas that rushes into the internal cavity of the air filter flows only through the filter material of the air filter to the outside of the air filter under the action of an instantaneous high pressure difference.

[0010] Furthermore, the high-pressure air is pulsed high-pressure air.

[0011] Furthermore, the pulse duration of the pulsed high-pressure air is 0.1 to 0.2 seconds.

[0012] Furthermore, the volume of the high-pressure air charged into the internal cavity of the air filter within one pulse duration is less than the total volume of the internal cavity of the air filter.

[0013] Furthermore, the instantaneous high pressure difference is that the pressure value in the internal cavity of the air filter is greater than 1.5 atmospheres within a time less than or equal to 0.1 second.

[0014] An air filter maintenance device, based on the above air filter maintenance method, includes: a high-pressure air supply system and an air filter maintenance mechanism assembly;

[0015] The air filter maintenance mechanism assembly includes: a bracket, a front sealing and air-dispersing mechanism, and a rear pressing mechanism;

[0016] The front sealing and air-dispersing mechanism and the rear pressing mechanism are oppositely arranged on the bracket;

[0017] The air filter to be maintained is clamped between the front sealing and air-dispersing mechanism and the rear pressing mechanism, and the air filter to be maintained is used to block the open end of the air filter;

[0018] The high-pressure air supply system is used to supply pulsed high-pressure air and is communicated with the front sealing and air-dispersing mechanism through an intermediate pipeline;

[0019] The pulsed high-pressure air rushes into the internal space inside the air filter through the front sealing and air-dispersing mechanism.

[0020] Furthermore, the front sealing and air-dispersing mechanism includes: a front vertical plate and more than one air inlet pipe;

[0021] The front vertical plate is arranged on the bracket;

[0022] The air inlet pipe is arranged on the front vertical plate, and the air inlet pipe and the front vertical plate are hermetically connected;

[0023] The open end of the air filter abuts against the front vertical plate through the rear pressing mechanism, and the pulsed high-pressure air rushes into the internal space of the air filter through the air inlet pipe.

[0024] Furthermore, the air inlet pipe passes through the front vertical plate or the air outlet end of the air inlet pipe is flush with the plate surface of the front vertical plate.

[0025] Furthermore, a dispersion head is provided at the air outlet end of each air inlet pipe.

[0026] Furthermore, the rear pressing mechanism includes: a rear vertical plate, a rocker arm and a pressing plate;

[0027] The rear vertical plate is arranged on the bracket, and threaded holes are provided on the rear vertical plate;

[0028] External threads are provided on the rocker arm, which are in threaded fit with the threaded holes of the rear vertical plate;

[0029] The pressing plate is arranged on the rocker arm;

[0030] The pressing plate moves linearly along the axis of the rocker arm as the rocker arm is screwed out and in.

[0031] Beneficial effects:

[0032] (1) For a method of maintaining an air filter element of the present invention, blocking the open end of the air filter element can prevent air leakage and pressure relief at the open end of the air filter element, so as to ensure that the high-pressure gas filled into the interior of the air filter element can instantaneously expand, uniformly fill the internal cavity of the air filter element, and form an instantaneous high pressure difference inside and outside the air filter element, which can effectively wash off the dust particles attached to the outer surface of the air filter material and can also effectively clean all corners of the filter element; when cleaning by this method, the fallen dust is visible to the naked eye, which can effectively clean the air filter element, improve the cleaning efficiency at the same time, thus ensuring the maintenance effect of the air filter element, and further effectively reducing the use cost of the engine.

[0033] (2) For a method of maintaining an air filter element of the present invention, the high-pressure air is pulsed high-pressure air, which is beneficial to forming an instantaneous high pressure difference and further improving the cleaning efficiency of the air filter element.

[0034] (3) For a method of maintaining an air filter element of the present invention, the unit volume of the high-pressure air filled into the interior of the air filter element is smaller than the volume of the internal cavity of the air filter element, which can realize the instantaneous expansion of the high-pressure air in the internal cavity of the air filter element.

[0035] (4) For a method of maintaining an air filter element of the present invention, the instantaneous high pressure is such that the pressure value in the internal cavity of the air filter element is greater than 1.5 atmospheres within a time less than or equal to 0.1 second, so that the high-pressure air is forced to spray out sufficiently to clean the filter element.

[0036] (5) An air filter maintenance device of the present invention provides pulsed high-pressure air through a high-pressure air supply system. At the same time, through the cooperation of the front sealing and air-dispersing mechanism and the rear pressing mechanism, the open end of the air filter can be blocked, thereby preventing air leakage and pressure relief at the open end of the air filter. The air filter is clamped between the front sealing and air-dispersing mechanism and the rear pressing mechanism, and cleaning can be completed without the need for operators, increasing the means of maintenance, improving the maintenance efficiency, avoiding the problem that the dust blown up during cleaning pours back into the filter element, and the dust diffused during blowing and washing is harmful to the cleaning personnel, etc., thereby effectively reducing the use cost of the engine.

[0037] (6) In an air filter maintenance device of the present invention, the air inlet pipe is arranged on the front vertical plate, and the air inlet pipe is hermetically connected to the front vertical plate, thereby preventing high-pressure air from leaking through the connection between the air inlet pipe and the front vertical plate and causing pressure relief, which affects the cleaning effect of the air filter.

[0038] (7) In an air filter maintenance device of the present invention, a dispersion head is provided at the air outlet end of each air inlet pipe, which is more conducive to the uniform dispersion of high-pressure gas, so that the high-pressure gas can fill every corner of the internal cavity of the air filter, further improving the cleaning effect.

[0039] (8) In an air filter maintenance device of the present invention, the rocker arm is in threaded cooperation with the threaded hole of the rear vertical plate, which can fully press the air filter against the front sealing and air-dispersing mechanism, further improving the blocking effect at the open end of the air filter. Description of the Drawings

[0040] Figure 1 It is a schematic structural diagram of the air filter to be maintained;

[0041] Figure 2 It is a schematic composition diagram of the present invention;

[0042] Figure 3 It is a schematic composition diagram of the high-pressure gas source supply system of the present invention;

[0043] Figure 4 It is a schematic structural diagram of the quick pipe joint of the present invention;

[0044] Figure 5 It is a schematic structural diagram of the intermediate pipeline of the present invention;

[0045] Figure 6 It is a schematic structural diagram of the air filter maintenance mechanism assembly of the present invention (equipped with an air filter);

[0046] Figure 7 It is a schematic structural diagram of the air filter maintenance mechanism assembly of the present invention (without an air filter);

[0047] Figure 8 It is a schematic structural diagram of the bracket of the present invention;

[0048] Figure 9 Schematic structural diagram of the front seal air-dispersing mechanism of the present invention;

[0049] Figure 10 Schematic structural diagram of the rear pressing mechanism of the present invention;

[0050] Wherein, 1 - high-pressure air supply system, 11 - compressor, 12 - high-pressure gas tank, 13 - solenoid valve controller, 14 - compressor controller, 15 - solenoid valve, 16 - short pipe, 17 - quick pipe joint, 2 - air filter maintenance mechanism assembly, 21 - bracket, 22 - front seal air-dispersing mechanism, 23 - rear pressing mechanism, 24 - air filter, 221 - front vertical plate, 222 - intake pipe, 223 - dispersion head, 231 - rear vertical plate, 232 - rocker arm, 233 - pressing plate, 241 - internal cavity, 242 - open end, 243 - filter material, 244 - closed end, 3 - intermediate pipeline. Specific embodiments

[0051] The present invention will be described in detail below with reference to the accompanying drawings and by way of examples.

[0052] Example 1:

[0053] This example provides an air filter maintenance method applicable to various air filters 24 having an internal cavity 241.

[0054] As an example, as Figure 1 shown, the air filter 24 has an open end and a closed end (i.e., including: open end 242 and closed end 244), and its wall and the closed end 244 are wrapped by a filter material 243 for filtering air. When the air filter 24 is in use, the air to be filtered enters the internal cavity 241 of the air filter 24 from the outside of the air filter 24 and is discharged through the open end 242.

[0055] Block the open end 242 of the air filter element 24 to prevent air leakage at the open end 242 of the air filter element 24, which may cause pressure relief (i.e., the high-pressure air filled into the internal cavity 241 of the air filter element 24 leaks from the open end 242 of the air filter element 24). Fill the internal cavity 241 of the air filter element 24 with high-pressure air, so that the high-pressure air expands instantaneously when it is filled into the internal cavity 241 of the air filter element 24, and the air pressure distribution in the internal cavity 241 of the air filter element 24 is uniform, forming an instantaneous high pressure difference between the inside and outside of the air filter element 24. At this time, under the action of the instantaneous high pressure difference (i.e., the pressure inside the air filter element 24 is instantaneously greater than the pressure outside the air filter element 24), the high-pressure air filled into the internal cavity 241 of the air filter element 24 flows outwards through the pores of the filter medium 243 of the air filter element 24, washing away the dust particles attached to the outer surface of the filter medium 243, thus realizing the maintenance of the air filter element 24. The cleaning process is a cleaning of the entire filter medium 243 of the air filter element 24.

[0056] When filling the internal cavity 241 of the air filter element 24 with high-pressure air, the high-pressure air only flows outwards through the pores of the filter medium 243 of the air filter element 24, that is, no air leakage occurs at the open end 242 of the air filter element 24 (i.e., most of the high-pressure air does not flow out through the open end 242 of the air filter element 24), thereby ensuring that the instantaneously expanding high-pressure air can form a uniformly distributed air pressure in the internal cavity 241 of the air filter element 24 and an instantaneous high pressure difference between the inside and outside of the air filter element 24.

[0057] The volume of the high-pressure air filled into the internal cavity 241 of the air filter element 24 within one pulse duration is less than the total volume of the internal cavity 241 of the air filter element 24, that is, the high-pressure air is filled from a small space into a large space, so that the gas molecules of the high-pressure air (compressed under high pressure) are instantaneously released and quickly diffuse into the surrounding space, realizing the instantaneous expansion of the high-pressure air in the internal cavity 241 of the air filter element 24.

[0058] The high-pressure air is pulsed high-pressure air, which is used to provide more impact force and is conducive to the instantaneous expansion of the high-pressure air. As an example, the pulse duration (i.e., the time length when the solenoid valve is opened) is preferably 0.1 to 0.2 seconds.

[0059] The instantaneous high pressure difference is that the pressure value in the internal cavity 241 of the air filter element 24 is greater than 1.5 atmospheric pressures within a time less than or equal to 0.1 second.

[0060] Embodiment 2:

[0061] This embodiment provides an air filter element maintenance device, which is based on the air filter element maintenance method in Embodiment 1.

[0062] As Figure 2As shown, the air filter maintenance device includes: a high-pressure air supply system 1, an air filter maintenance mechanism assembly 2, and an intermediate pipeline 3 connecting the high-pressure air supply system 1 and the air filter maintenance mechanism assembly 2.

[0063] The high-pressure air supply system 1 is used to provide high-pressure air with different pulse durations. As Figure 3 shown, the high-pressure air supply system 1 includes: an air compressor 11, a high-pressure air tank 12, a pulse solenoid valve 15, a compressor controller 14, and a solenoid valve controller 13.

[0064] The air compressor 11 is used to form high-pressure air. The compressor controller 14 controls the air compressor 11 to charge the high-pressure air tank 12 until the pressure in the high-pressure air tank 12 reaches the set value.

[0065] The high-pressure air tank 12 is used to store the compressed high-pressure air and is connected to the air compressor 11.

[0066] The pulse solenoid valve 15 is used to form a pulsed air flow and is arranged at the outlet end of the high-pressure air tank 12. The solenoid valve controller 13 controls the opening duration of the pulse solenoid valve 15, that is, adjusts the pulse duration of the high-pressure air as needed.

[0067] As an example, the pulse solenoid valve 15 is connected to a short pipe 16.

[0068] As Figure 6 shown, the air filter maintenance mechanism assembly 2 is used to block the open end 242 of the air filter 24 and provide support for the air filter 24. As Figure 7 shown, the air filter maintenance mechanism assembly 2 includes: a bracket 21, a front sealing and air-dispersing mechanism 22, and a rear pressing mechanism 23.

[0069] As Figure 8 shown, the bracket 21 is of a U-shaped structure and includes: a bottom plate and two side walls, and the two side walls are vertically arranged on both sides of the bottom plate.

[0070] As Figure 9 shown, the front sealing and air-dispersing mechanism 22 includes: a front vertical plate 221 and more than one air inlet pipe 222.

[0071] The front vertical plate 221 is arranged parallel to one side wall of the bracket 21 and is used to block the open end 242 of the air filter 24.

[0072] The air inlet pipe 222 is used to fill the internal cavity 241 of the air filter 24 with gas. The air inlet pipe 222 is arranged on the front vertical plate 221, and the air inlet pipe 222 is hermetically connected to the front vertical plate 221. When the number of air inlet pipes 222 is greater than one, the lengths of each air inlet pipe 222 can be equal or unequal.

[0073] As an example, the intake pipe 222 passes through the front vertical plate 221 or the outlet end of the intake pipe 222 is flush with the plate surface of the front vertical plate 221.

[0074] As an example, a dispersion head 223 is provided at the outlet end of each intake pipe 222 (i.e., the end located inside the bracket 21), so that the gas can be further evenly dispersed. The dispersion head 223 is preferably a spherical dispersion head.

[0075] As an example, the axis of the intake pipe 222 is perpendicular to the plate surface of the front vertical plate 221, which can reduce the occupied space of the intake pipe 222 in the internal cavity 241 of the air filter element 24.

[0076] As an example, the intake pipe 222 is connected to the front vertical plate 221 by welding.

[0077] As an example, preferably two intake pipes 222 are provided.

[0078] As Figure 10 shown, the rear pressing mechanism 23 includes: a rear vertical plate 231, a rocker arm 232 and a pressing plate 233.

[0079] The rear vertical plate 231 is arranged in parallel on another side wall of the bracket 21, and threaded holes are provided on the rear vertical plate 231.

[0080] External threads are provided on the rocker arm 232, and the rocker arm 232 is in threaded fit with the threaded holes on the rear vertical plate 231.

[0081] The pressing plate 233 is arranged at one end of the rocker arm 232 located inside the bracket 21.

[0082] As an example, the pressing plate 233 is a circular plate, and the pressing plate 233 is coaxially connected to the screw rod.

[0083] The pressing plate 233 moves linearly along the axis of the rocker arm 232 as the rocker arm 232 rotates out of and into the rear vertical plate 231; the pressing plate 233 is used to press the air filter element 24 against the front vertical plate 221.

[0084] As Figure 2 shown, the air filter element maintenance mechanism assembly 2 and the high-pressure air supply system 1 are communicated through an intermediate pipeline 3 ( Figure 5 ). One end of the intermediate pipeline 3 is docked with a short pipe 16 through a quick coupling 17 ( Figure 4 ), and the other end of the intermediate pipeline 3 is docked with the intake pipe 222 through a quick coupling 17, so that the intermediate pipeline 3 is quickly connected to the short pipe 16 and the intake pipe 222.

[0085] When in use, the air filter element 24 is arranged between the front sealing air dispersion mechanism 22 and the rear pressing mechanism 23. The pressing plate 233 of the rear pressing mechanism 23 pushes the closed end 244 of the air filter element 24, so that the open end 242 of the air filter element 24 abuts against the front vertical plate 221, so that the open end 242 of the air filter element 24 is in a blocked state. The sealing ring provided at the open end of the air filter element 24 can further improve the blocking effect of the open end 242 of the air filter element 24.

[0086] Working principle:

[0087] The pulsed high-pressure air formed by the high-pressure air supply system 1 is filled into the internal cavity 241 of the air filter element 24 through the air inlet pipe 222. When the high-pressure air is filled into the internal cavity 241 of the air filter element 24 through the air filling pipe 222, it expands instantly. Since the open end 242 of the air filter element 24 is in a blocked state, and the air inlet pipe 222 is tightly connected to the front vertical plate 221, there is no scattered air at the open end 242 of the air filter element 24, thereby ensuring that the air pressure in the internal cavity 241 of the air filter element 24 is evenly distributed, while forming an instantaneous high pressure difference inside and outside the air filter element. Under the action of the instantaneous high pressure difference, the high-pressure gas in the internal cavity 241 of the air filter element 24 flows outward only through the pores of the filter material 243 of the air filter element 24, which can effectively wash off the dust particles attached to the outer surface of the filter material 243.

[0088] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for maintaining an air filter element, characterized in that: The open end (242) of the air filter element (24) is blocked, and when high-pressure air is charged into the internal cavity (241) of the air filter element (24), the high-pressure air enters the air filter element (24) and expands instantly, so that the air pressure in the internal cavity (241) of the air filter element (24) is evenly distributed, and an instantaneous high pressure difference is formed inside and outside the air filter element (24); The high-pressure gas that rushes into the internal cavity (241) of the air filter element (24) flows to the outside of the air filter element (24) only through the filter material (243) of the air filter element (24) under the action of the instantaneous high pressure difference.

2. An air filter element maintenance method as claimed in claim 1, characterized in that: The high-pressure air is pulsed high-pressure air.

3. A method for maintaining an air filter element as claimed in claim 2, characterized in that: The pulse duration of the pulse high-pressure air is 0.1 to 0.2 seconds.

4. The air filter element maintenance method according to claim 2, characterized in that: The volume of the high-pressure air filled into the internal cavity (241) of the air filter element (24) within a pulse duration is smaller than the total volume of the internal cavity (241) of the air filter element (24).

5. An air filter element maintenance method according to any one of claims 1 to 4, characterized in that: The instantaneous high pressure difference means that the pressure value of the internal cavity (241) of the air filter element (24) is greater than 1.5 atmospheres within a time period of less than or equal to 0.1 seconds.

6. An air filter element maintenance device, based on the air filter element maintenance method according to any one of claims 1 to 5, characterized in that: include: A high-pressure air supply system (1) and an air filter element maintenance mechanism assembly (2); The air filter element maintenance mechanism assembly (2) comprises: a bracket (21), a front sealing and air dispersion mechanism (22) and a rear pressing mechanism (23); The front sealing and air dispersing mechanism (22) and the rear pressing mechanism (23) are arranged on the bracket (21) in a relative manner; The air filter element (24) to be maintained is clamped between the front sealing air dispersion mechanism (22) and the rear pressing mechanism (23), and the air filter element (24) to be maintained is used to seal the open end (242) of the air filter element (24); The high-pressure air supply system (1) is used to supply pulsed high-pressure air and is connected to the front sealing air dispersion mechanism (22) through the intermediate pipeline (3); The pulsed high-pressure air rushes into the internal space of the air filter element (24) through the front sealing air dispersion mechanism (22).

7. An air filter element maintenance device as claimed in claim 6, characterized in that: The front sealing air diffusion mechanism (22) comprises: a front vertical plate (221) and one or more air inlet pipes (222); The front vertical plate (221) is arranged on the bracket (21); The air intake pipe (22) is arranged on the front vertical plate (221), and the air intake pipe (22) and the front vertical plate (221) are tightly connected; The open end (242) of the air filter element (24) contacts the front vertical plate (221) through the rear pressing mechanism (23), and the pulse high-pressure air rushes into the internal space of the air filter element (24) through the air inlet pipe (22).

8. An air filter element maintenance device as claimed in claim 6, characterized in that: The air inlet pipe (222) passes through the front vertical plate (221), or the air outlet end of the air inlet pipe (222) is flush with the plate surface of the front vertical plate (221).

9. An air filter element maintenance device as claimed in claim 8, characterized in that: A dispersion head (223) is provided at the air outlet end of each air inlet pipe (222).

10. An air filter element maintenance device as claimed in any one of claims 6 to 9, characterized in that: The rear pressing mechanism (23) comprises: a rear vertical plate (231), a rocker arm (232) and a pressing plate (233); The rear vertical plate (231) is arranged on the bracket (21), and a threaded hole is arranged on the rear vertical plate (231); The rocker arm (232) is provided with an external thread, which is threadably matched with the threaded hole of the rear vertical plate (231); The pressure plate (233) is arranged on the rocker arm (232); The pressing plate (233) moves linearly along the axis of the rocker arm (232) as the rocker arm (232) is rotated out and in.

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