Air filtering assembly and air filtering back-blowing device applied by air filtering assembly

Abstract

The embodiment of the utility model provides an air filtering assembly and an air filtering back-blowing device applied to the air filtering assembly, and the assembly comprises a barrel which comprises a to-be-closed end, a containing space and a ventilation end opposite to the to-be-closed end which are communicated with one another; the periphery of the to-be-closed end bends and extends towards the opposite ventilation end to form a curled edge; the ventilation end is provided with an air outlet; the end cover covers the end to be closed; the edge of the end cover abuts against the curled edge in a shape matched mode, a plurality of buckles are rotatably arranged in the circumferential direction of the end cover, the buckles rotate till the outer ends of the buckles are reversely buckled on the curled edge so that the end cover can be located on the cylinder body, and sealing of the abutting portion between the end cover and the curled edge is formed. According to the air filtering assembly, sealing and mutual fixing can be achieved through structural matching between the end cover and the to-be-closed end of the barrel, and the cost of using an air filtering device by engineering equipment is effectively reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of air filtration of engineering equipment, and in particular to an air filtration assembly and an air filtration back-flushing device used therein. Background Art

[0002] The air filter of engineering equipment mainly adopts the technology of centrifugal filtration in the air intake (or pre-filtration of mixed air) plus two-stage dry filtration. The air filter is regularly replaced with a new one, or the old one is removed from time to time and maintained by blowing dust with compressed air to ensure the normal operation of the filter, thereby keeping the air in the engine intake system clean and ensuring the normal operation of the gas-using equipment and the engine.

[0003] Since engineering equipment basically works in harsh outdoor environments, in addition to the dusty environment, there are also problems such as rain and humidity, so the air filter itself also needs to be waterproof. The current common waterproofing uses components such as sealing rings, which is relatively costly and is not conducive to product competitiveness. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide an air filter assembly and an air filter backflush device used therein to solve the problems in the related art.

[0005] The first aspect of the present disclosure provides an air filter assembly, comprising: a cylinder, comprising: a connected end to be closed, a accommodating space and a ventilation end opposite to the end to be closed; wherein the periphery of the end to be closed is bent and extended in the direction opposite to the ventilation end to form a curling edge; the ventilation end is provided with an air outlet; an end cover, which is provided on the end to be closed; the edge of the end cover is in abutment with the curling edge in a shape-matching manner, and the end cover is rotatably provided with a plurality of buckles in the circumferential direction, which are used to rotate until the outer ends of the buckles are inverted on the curling edge to position the end cover on the cylinder, and form a seal at the abutment portion between the end cover and the curling edge.

[0006] In an embodiment of the first aspect, the air filter assembly includes: a filter element, which is ring-shaped, and its two ends are respectively arranged in the accommodating space to abut against the end cover and the ventilation end, so as to divide the accommodating space into a pre-filtration area outside the ring of the filter element and a post-filtration area inside the ring; the air outlet is located inside the ring of the filter element.

[0007] In an embodiment of the first aspect, a sleeve assembly is provided at the air outlet; the sleeve assembly comprises: an inner tube, connected to the air outlet and provided with a through opening for outputting the filtered airflow; an outer tube, which is sleeved outside the inner tube and one end of which is away from the cylinder is airtightly connected to the inner tube; an airflow channel having a jet port connected to the accommodating space is formed between the outer tube and the inner tube, and the jet port is formed by the other end of the outer tube close to the cylinder and the interval between the inner tube, and the outer tube is connected to a pipeline for transmitting the dust-removing airflow to the filter element in the cylinder so as to flow the dust-removing airflow into the airflow channel.

[0008] In an embodiment of the first aspect, the abutting portion is a connection between curved surfaces or undulating surfaces; and / or, at least one pair of handles is provided on a surface of the end cover facing away from the cylinder.

[0009] According to a second aspect of the present disclosure, there is provided an air filter back-blowing device, which is used for air filtration of engines of engineering equipment. The air filter back-blowing device comprises: a first air filter unit, which is based on the structural structure of the air filter assembly as described in any one of the first aspects; the first air filter unit comprises a first cylinder, which comprises a first accommodating space; a first air outlet is arranged at the ventilation end of the first cylinder; a group of first air inlet holes are arranged circumferentially on the end surface of the ventilation end of the first cylinder, and a group of second air inlet holes are arranged circumferentially along the side wall of the first cylinder; a first filter element is arranged in the first cylinder, and the first air inlet hole is located between the first filter element and the side wall of the first cylinder; an air storage tank is connected to the first accommodating space through the first air outlet; wherein the air pressure in the air storage tank is higher than the air pressure in the first accommodating space; a release valve, which is used to be set with a valve state to open / close the pipeline from the air storage tank to the first air outlet, so as to release the dust removal airflow from the air storage tank through the first air outlet to the first filter element when the pipeline is connected; and a controller, which is electrically connected and sets the valve state of the release valve.

[0010] In an embodiment of the second aspect, the air filter back-blowing device includes: a second air filter unit, based on the structural structure of the air filter component as described in any one of the first aspects; the second air filter unit includes a second cylinder, and the side wall of the second cylinder is provided with an air inlet connected to the first air outlet by a pipeline; the ventilation end of the second cylinder is provided with a second air outlet for connecting to the engine.

[0011] In an embodiment of the second aspect, the air inlet and the first air outlet are connected through a straight pipeline, and the first central axis of the air inlet intersects with the second central axis of the second cylinder.

[0012] In an embodiment of the second aspect, the air filtration back-blowing device includes: an annular baffle, which is arranged in the first accommodating space of the first cylinder, located between the side wall of the first cylinder and the first filter element and corresponding to each of the second air inlet holes; the bottom edge of the annular baffle abuts against the surface of the ventilation end and passes through each of the first air inlet holes.

[0013] In an embodiment of the second aspect, the gas storage tank is connected to the main gas tank of the engineering equipment via a pipeline provided with a regulating valve; the gas storage tank is provided with a pressure sensor; the controller is electrically connected to the pressure sensor and the regulating valve to set the opening of the regulating valve according to the pressure signal of the pressure sensor.

[0014] In an embodiment of the second aspect, the release valve is located at the upper end of the gas tank; and / or; a drain valve is provided at the bottom of the gas tank; and / or, the gas tank is arranged vertically; and / or, the gas tank is provided with a pressure switch triggered by the gas tank reaching a preset air pressure, the bottom of the gas tank is connected to an air pump, and the pressure switch is electrically connected to the air pump.

[0015] As described above, the disclosed embodiment provides an air filter assembly and an air filter back-blowing device used therein, the assembly comprising: a cylinder, comprising: a connected end to be closed, a containing space and a ventilation end opposite to the end to be closed; wherein the periphery of the end to be closed is bent and extended in the direction opposite to the ventilation end to form a curling edge; the ventilation end is provided with an air outlet; an end cover is provided on the end to be closed; the edge of the end cover is in abutment with the curling edge in a shape-matching manner, and the end cover is rotatably provided with a plurality of buckles in the circumferential direction, for being rotated to make the outer end of the buckle inverted on the curling edge to position the end cover on the cylinder, and forming a seal at the abutment portion between the end cover and the curling edge. The air filter assembly can achieve sealing and mutual fixation through the structural cooperation between the end cover and the end to be closed of the cylinder, effectively reducing the cost of using air filter devices in engineering equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram showing the structure of an air filter assembly from one perspective in one embodiment of the present disclosure.

[0017] Figure 2 A schematic diagram showing the structure of an air filter assembly from another perspective in an embodiment of the present disclosure.

[0018] Figure 3 A schematic diagram showing the structure in which the end cover is positioned and covered on the end to be closed of the cylinder to form a relative seal in one embodiment of the present disclosure.

[0019] Figure 4 A schematic diagram showing the structure of an air filtering back-blowing device in one embodiment of the present disclosure is shown.

[0020] Figure 5A schematic diagram of a longitudinal cross-section structure showing one perspective of an air filter backflush device in one embodiment of the present disclosure.

[0021] Figure 6 A schematic diagram of the longitudinal cross-section structure showing another perspective of the air filter backflush device in one embodiment of the present disclosure.

[0022] Figure 7 exhibit Figure 4 Schematic diagram of the structure of the first cylinder after radial sectioning.

[0023] Figure 8 A schematic diagram showing a module of an electronic control system for an air filter backflush device in one embodiment of the present disclosure. DETAILED DESCRIPTION

[0024] The following is an explanation of the embodiments of the present disclosure by specific examples, and those skilled in the art can easily understand other advantages and effects of the present disclosure from the information disclosed by the present disclosure. The present disclosure can also be implemented or applied through other different specific embodiments, and the details in the present disclosure can also be modified or changed in various ways according to different viewpoints and application modules without departing from the spirit of the present disclosure. It should be noted that the embodiments in the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0025] The following is a detailed description of the embodiments of the present disclosure with reference to the accompanying drawings so that those skilled in the art can easily implement the present disclosure. The present disclosure can be embodied in many different forms and is not limited to the embodiments described herein.

[0026] In the representations of the present disclosure, the reference terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" and the like mean that the specific features, structures, materials or characteristics represented in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. Moreover, the specific features, structures, materials or characteristics represented may be combined in any one or a group of embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples represented in the present disclosure and the features of different embodiments or examples, unless they are mutually contradictory.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the representation of the present disclosure, "a group" means two or more, unless otherwise clearly and specifically defined.

[0028] In order to clearly describe the present disclosure, components not related to the description are omitted, and the same reference numerals are given to the same or similar components throughout the specification.

[0029] Throughout the specification, when a device is said to be "connected" to another device, this includes not only the case of "direct connection" but also the case of "indirect connection" by placing other elements therebetween. In addition, when a device is said to "include" a certain component, unless otherwise stated, it does not exclude other components, but means that other components may be included.

[0030] Although the terms first, second, etc. are used to represent various elements in this article in some examples, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, the first interface and the second interface, etc. are represented. Moreover, as used in this article, the singular forms "one", "one" and "the" are intended to also include plural forms, unless there is an opposite indication in the context. It should be further understood that the terms "comprising" and "including" indicate that there are the described features, steps, operations, elements, modules, projects, kinds, and / or groups, but do not exclude the existence, occurrence or addition of one or a group of other features, steps, operations, elements, modules, projects, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Therefore, "A, B or C" or "A, B and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C". Only when the combination of elements, functions, steps or operations is inherently mutually exclusive in some way, will there be an exception to this definition.

[0031] The technical terms used herein are only used to refer to specific embodiments and are not intended to limit the present disclosure. The singular form used herein also includes the plural form unless the sentence clearly indicates the contrary meaning. The meaning of "including" used in the specification is to specify specific characteristics, regions, integers, steps, operations, elements and / or components, and does not exclude the existence or addition of other characteristics, regions, integers, steps, operations, elements and / or components.

[0032] Although not defined differently, all terms, including technical and scientific terms used herein, have the same meaning as those generally understood by those skilled in the art to which the present disclosure belongs. Terms defined in commonly used dictionaries are additionally interpreted as having meanings consistent with relevant technical literature and the message of the present disclosure, and shall not be overly interpreted as ideal or very formal meanings unless defined.

[0033] Usually, equipment with an engine will be equipped with an air filter backflush device before the engine intake to prevent dust from entering the engine and affecting its operation. Engineering equipment, such as off-road mining trucks, excavators, etc., will also need to be equipped with an air filter backflush device for the engine. However, since engineering equipment basically works in harsh environments exposed outdoors, there are problems with rain and humidity, and the air filter needs to be waterproof. Currently, common waterproofing uses components such as sealing rings. In view of the larger volume of the air filter backflush device for engineering equipment, the sealing ring used is larger in volume and different in specifications, which relatively increases the cost and affects the assembly efficiency, which is not conducive to product competitiveness.

[0034] In view of this, the embodiments of the present invention provide an air filter assembly and an air filter back-blowing device used therein. The air filter assembly can achieve positioning, covering and sealing through structural coordination, eliminating the sealing ring component, which can effectively reduce costs and improve the installation efficiency of the air filter assembly.

[0035] like Figure 1 As shown, a schematic diagram of the structure of an air filter assembly from one perspective in one embodiment of the present disclosure is shown.

[0036] exist Figure 1 In the figure, the air filter assembly 100 is exemplarily shown to include a barrel 101 and an end cap 102. The barrel 101 includes an end 111 to be closed, a receiving space 112, and a ventilation end 113 opposite to the end 111 to be closed. As an example, the barrel 101 is cylindrical, and its upper end is the end 111 to be closed, and the end cap 102 covers the end 111 to be closed. It can be understood that the end cap 102 is detachable, and when it is removed, the opening of the end 111 to be closed is exposed, and the opening is connected to the receiving space 112 of the barrel 101 inwardly.

[0037] exist Figure 1 In the embodiment, the lower end of the cylinder 101 opposite to the end to be closed 111 is a venting end 113. Figure 2 As shown, the vent end 113 is provided with an air outlet 1131, and the air outlet 1131 is connected to the accommodating space 112 in the cylinder 101. Exemplarily, a flange ring may be fixedly provided on the vent end 113 of the cylinder 101, and the inner hole of the flange ring serves as the air outlet 1131. Optionally, a group of first air inlet holes 114 may be circumferentially provided on the end face of the vent end 113, and a group of second air inlet holes 115 may be circumferentially provided on the side wall of the cylinder 101, and the group of second air inlet holes 115 may be located on the portion of the side wall connected to the vent end 113. It should be noted that Figure 2Although the air filter assembly 100 is provided with the first air inlet hole 114 and the second air inlet hole 115, the air filter assembly 100 in other embodiments may not have the first air inlet hole 114 and the second air inlet hole 115, which can be selected according to the scene requirements and is not limited to the figure.

[0038] See also Figure 3 As shown, the end cap 102 is positioned to cover the end 111 to be closed of the cylinder 101 and form a relatively sealed structure. Specifically, the periphery of the end 111 to be closed is bent and extended toward the opposite ventilation end 113 to form a curling edge 1111, and the cross section of the curling edge 1111 can be, for example, an inverted U shape as shown in the figure or other winding curved shapes. Figure 3 It can be seen that the edge 121 of the end cover 102 is in abutment with the curling edge 1111 in a shape-matched manner, and the two fit each other, so that the cross section of the edge 121 of the end cover 102 presents a sideways L shape. After bending, the gap between the curling edge 1111 and the edge 121 of the end cover 102 is set downward, which can effectively prevent the downward dripping of water vapor from above. In some embodiments, in addition to the connection of curved surfaces, the abutment portion between the edge 121 of the end cover 102 and the curling edge 1111 can also be a wavy surface connection, and the cross section of the wavy surface can be wavy or serrated, etc. In some embodiments, at least one pair of handles, such as metal handles, can be provided on the surface of the end cover 102 away from the cylinder 101, to facilitate the application of force when removing the end cover 102.

[0039] In addition, it can be seen that the end cover 102 is rotatably provided with a plurality of buckles 122. In the figure, one end of the buckle 122 is hinged to the surface of the end cover 102 (e.g., the side in the figure), and the other end can be relatively rotated or close to the side of the end cover 102. The other end of the buckle 122 has a hook portion, and the length of the buckle 122 can be set to: when the buckle 122 is in a normal state, the hook portion cannot reach the side surface of the curling edge 1111 facing the ventilation end 113, and when the buckle 122 is pressed and rotated close to the surface of the end cover 102, a certain elastic deformation occurs and stretches, so that the hook portion is buckled on the curling edge 1111 (e.g., buckled on the inner side wall of the inverted U-shaped side close to the hook), so that the end cover 102 is pressed and positioned on the cylinder 101, forming a relative fixation. In addition, the edge 121 of the end cover 102 is pressed in a shape-matched manner with the surface of the curling edge 1111, so that a good sealing effect can be achieved.

[0040] The accommodating space 112 can be used to set a filter element ( Figures 1 to 3(not shown in the figure). For example, the filter element can be made of paper. For example, the filter element can be annular, such as a circular ring, and the filter element can be coaxially arranged with the barrel 101. The two ends of the filter element are respectively abutted against the end cover 102 and the ventilation end 113 and arranged in the accommodating space 112 to divide the pre-filtration area outside the ring of the filter element and the post-filtration area inside the ring in the accommodating space 112. The air outlet 1131 is located on one side of the filter element ring. The structure of the barrel 101 and the filter element can refer to the following Figure 5 and Figure 6 shown.

[0041] As an example, the air filter assembly 100 can be applied to an air filter backflush device. The air filter backflush device can use one or more air filter assemblies 100 .

[0042] like Figure 4 As shown, a schematic diagram of the structure of an air filtering back-blowing device in one embodiment of the present disclosure is shown.

[0043] The air filtering back-flushing device at least includes a first air filtering unit 200a, an air storage tank 203, a release valve 204 and a controller 205.

[0044] The first air filter unit 200a includes an air filter assembly as described in any of the previous embodiments. Specifically, the first air filter unit 200a includes a first barrel 201a and a first end cap 202a, and the ventilation end 213a of the first barrel 201a is provided with a first air outlet 2131a. As an example, the first end cap 202a covers the end 211a to be closed (shown as the upper end in the figure) of the first barrel 201a, and the first air outlet 2131a is located at the ventilation end 213a of the first barrel 201a (shown as the lower end in the figure). The first air filter unit 200a can be connected to Figures 1 to 3 The structure of the air filter assembly is the same as that of the first cylinder 201a, that is, a group of first air inlet holes 214a are arranged along the circumferential direction on the end surface of the ventilation end (refer to Figure 5 ), and a group of second air inlet holes 215a are arranged along the circumference of the side wall of the first cylinder 201a.

[0045] Can be referenced together Figure 5As shown, the first cylinder 201a is provided with a first filter element 216a, which may be annular and coaxially arranged with the first cylinder 201a, and the two ends are respectively arranged in the first cylinder 201a in contact with the first end cap 202a and the vent end 213a, so as to divide the first filter element 216a into a pre-filtering area 2121a outside the ring and a post-filtering area 2122a inside the ring in the first accommodation space 212a of the first cylinder 201a, and the first filter element and the first air outlet 2131a of the first cylinder 201a are located inside the ring of the first filter element 216a. The first air inlet through hole 214a is located between the first filter element 216a and the side wall of the first cylinder 201a.

[0046] The gas storage tank 203 is connected to the first accommodation space 212a through the first gas outlet. The gas pressure in the gas storage tank 203 is higher than the gas pressure in the first accommodation space 212a. In some embodiments, the gas storage tank 203 stores gas at a pressure of 8kg to 10kg.

[0047] The release valve 204 is used to be set to a valve state to open / close the pipeline from the gas tank 203 to the first gas outlet 2131a, so as to release the dust removal airflow from the gas tank 203 through the first gas outlet 2131a to the first filter element 216a when the pipeline is open. As an example, the release valve 204 can be a pulse solenoid valve.

[0048] See also Figure 8 As shown, Figure 8 A schematic diagram of a module of an electric control system of an air filter backflush device in an embodiment of the present disclosure is shown. The controller 205 is electrically connected to and sets the valve state of the release valve 204. As an example, the controller 205 can trigger the release valve 204 to conduct the pipeline each time through a pulse signal. In some embodiments, the controller 205 can be implemented based on an MCU, a SoC, a CPU, or an FPGA.

[0049] Specifically, if Figure 5As shown, the first air filter unit 200a can realize the self-cleaning function. When self-cleaning is required, the controller 205 sends a pulse signal to the release valve 204, sets the valve state of the release valve 204 to conduct the pipeline from the gas tank 203 to the first gas outlet 2131a, and the high-pressure gas in the gas tank 203 rushes into the first cylinder 201a from the first gas outlet 2131a, and reaches the post-filter area 2122a as a dust removal airflow. Since the external air enters from the first air inlet hole 214a and the second air inlet hole 215a and passes through the first filter element 216a from the pre-filter area 2121a to the post-filter area 2122a, the dust will be filtered and retained on the surface of the first filter element 216a located in the pre-filter area 2121a, as shown by the arrow in the figure. The dust removal airflow will cause the dust attached to the first filter element 216a to fall off and be discharged from the first air inlet hole 214a and the second air inlet hole 215a near the lower end. Thus, self-cleaning of the first air filter unit 200a is achieved.

[0050] Since the dust accumulation of the filter element will affect the air flow rate, the more dust accumulation, the smaller the air flow rate. Therefore, as an example, you can refer to Figure 8 As shown, a flow sensor 207 can be provided, electrically connected to the controller 205. When it is detected that the airflow rate is lower than a preset threshold value, it means that the dust accumulation of the first filter element 216a reaches a condition that requires the initiation of a self-cleaning action, and the controller 205 can output the pulse signal to perform the self-cleaning action. In some embodiments, the first air outlet 2131a can be connected to a transfer tube, and the two ends of the transfer tube are respectively connected to the first accommodating space in the first cylinder 201a and the next-level equipment (such as the next-level filter unit or the engine, etc.), and the gas storage tank 203 can be connected to the side wall of the transfer tube by a pipeline, and the flow sensor 207 can be provided in the transfer tube.

[0051] exist Figure 5In the embodiment, the transfer tube can be implemented as a sleeve assembly 208, which is arranged at the first air outlet 2131a. Optionally, the sleeve assembly 208 can be in airtight contact with the first air outlet 2131a. The sleeve assembly 208 includes an inner tube 281 and an outer tube 282, the inner tube 281 is connected to the first air outlet 2131a, and is provided with a through hole for outputting the filtered airflow, that is, the lower end opening in the figure. The outer tube 282 is sleeved outside the inner tube 281 and its end away from the first cylinder 201a is airtightly connected to the inner tube 281; the outer tube 282 and the inner tube 281 are spaced to form an airflow channel 283 having an air jet 2831 connected to the first accommodating space 212a, and the air jet 2831 is formed by the other end of the outer tube 282 and the inner tube 281. The airflow channel 283 is provided for the dust removal airflow to pass into the first filter element 216a in the first cylinder 201a. As an example, the outer tube 282 may be provided with a vent to communicate with the pipeline of the gas storage tank 203. The edge of the inner tube 281 close to one end (i.e., the upper end in the figure) inside the first cylinder 201a is tilted outward to guide the dust removal airflow ejected from the jet port 2831 to impact the inner side surface of the first filter element 216a outward, thereby realizing the structure of the "annular trumpet jet port", which helps to improve the cleaning effect of the first filter element 216a.

[0052] exist Figure 4 In the embodiment, the air filter back-blowing device further comprises a second air filter unit 200b, which is connected to the rear stage of the first air filter unit 200a. The second air filter unit 200b is also implemented based on the air filter assembly, but the second air filter unit 200b does not need to be provided with the first air inlet hole 214a and the second air inlet hole 215a. The second air filter unit 200b comprises a second cylinder 201b and a second end cover 202b, and the end 211b to be closed of the second cylinder 201b covers the second end cover 202b, and can be referred to together Figure 5 and Figure 6 As shown, the ventilation end 213b opposite to the end 211b to be closed is provided with a second air outlet 2131b for connecting to the engine. The side wall of the second cylinder 201b is provided with an air inlet 210b connected to the first air outlet 2131a through a pipeline. A second accommodating space 212b connecting the air inlet 210b and the second air outlet 2131b is formed in the second cylinder 201b, for setting a second filter element 216b whose two ends are respectively abutted against the end 211b to be closed and the second end cover 202b, and the second filter element 216b is coaxially arranged with the second cylinder 201b. Exemplarily, the first air filter unit 200a and the second air filter unit 200b can be of the same size structure, and the second filter element 216b and the first filter element 216a can be the same, and can be used as a spare for the first filter element 216a to improve the reliability of the air filtration back-blowing device.

[0053] exist Figure 4 In the embodiment, the second cylinder 201b and its matching second end cover 202b are as follows: Figure 3 The structure shown achieves a sealed positioning connection and has a good sealing effect. Figure 6 As indicated by the middle arrow, the airflow entering the first cylinder 201a passes through the first filter element 216a, flows downward from the first air outlet 2131a, enters the air inlet 210b of the second cylinder 201b, passes through the second filter element 216b, and flows out of the second cylinder 201b from the second air outlet 2131b. After two-stage filtration, the air enters the engine to provide clean air.

[0054] For example, reference may be made to Figure 5 As shown, the air inlet 210b and the first air outlet 2131a are connected through a straight line, which is exemplified by the sleeve assembly 208, and the sleeve assembly 208 extends along a straight line. The first central axis Y where the air inlet 210b and the first air outlet 2131a coincide with each other intersects with the center O of the second cylinder, that is, the first air filter unit 200a and the second air filter unit 200b are connected in the middle of the radial direction of the second air filter unit 200b. Figure 5 As shown in the example, the first air filter unit 200a can be placed vertically, and its central axis can be collinear with the central axis of the first air outlet 2131a. The second air filter unit 200b can be placed horizontally, and the central axis of the second air filter unit 200b is perpendicular to and intersects with the central axis of the first air outlet 2131a, and the central axis of the first air outlet 2131a passes through the center of the second air filter unit 200b. Under this structure, the air outlet of the first air outlet 2131a enters the second cylinder 201b in the radial direction of the second cylinder 201b, and compared with the eccentric connection mode in which the first air outlet 2131a deviates from the central axis of the second cylinder 201b, no swirl is generated, the energy loss of the air flow is avoided, and a sufficient intake flow rate is guaranteed.

[0055] In addition, illustratively, Figure 4 and Figure 5As shown, the gas tank 203 can be arranged vertically. The release valve 204 can be located at the upper end of the gas tank 203, and a drain valve 233 is provided at the bottom of the gas tank 203. The advantage of the release valve 204 being arranged at the upper end of the gas tank 203 is that there may be both gas and liquefied liquid in the gas tank 203, and when spraying the dust removal airflow, it is necessary to spray gas and avoid liquid from being sprayed onto the first filter element 216a (generally non-washable paper) and causing damage. Therefore, the release valve 204 releases gas at the upper end of the gas tank 203, and the liquid is released at the bottom through the drain valve 233, so that the liquid level can be effectively controlled to be at a lower position, and the liquid will not enter the first air outlet 2131a together with the gas.

[0056] As an example, Figure 4 As shown, on some engineering equipment with a main gas tank 300, such as an off-road mining truck, the main gas tank can be used to supply gas to the gas storage tank 203. Specifically, the gas storage tank 203 can be connected to the main gas tank 300 through a pipeline provided with a regulating valve 301. The gas storage tank 203 can be provided with a pressure sensor. Figure 8 As shown, the controller 205 is electrically connected to the pressure sensor 234 and the regulating valve 301 to set the opening of the regulating valve 301 according to the pressure signal of the pressure sensor 234, for example, by adjusting the opening of the regulating valve 301 to adjust the pressure of the high-pressure gas output from the main gas tank 300 to the gas storage tank 203. Exemplarily, the gas storage tank 203 may also be provided with a pressure sensor 234, which is electrically connected to the controller 205, and is used to detect the pressure signal of the gas pressure of the gas storage tank 203 and transmit it to the controller 205. The controller 205 may adjust the opening of the regulating valve 301 according to the gas pressure of the gas storage tank 203. For example, if the gas pressure in the gas storage tank 203 is higher than a preset threshold, the opening of the regulating valve 301 may be correspondingly increased to reduce the pipeline gas pressure; conversely, if the gas pressure in the gas storage tank 203 is too low, the opening of the regulating valve 301 may also be reduced to increase the gas pressure.

[0057] It is understandable that when the release valve 204 used in the gas tank 203 is a solenoid valve with only two states of on / off, the regulating valve needs to be set with a suitable pipeline pressure to avoid the problem of excessive or insufficient air pressure in the gas tank 203. Excessive air pressure may spray out dust removal airflow that exceeds the pressure that the first filter element 216a can withstand, thereby damaging the first filter element 216a and shortening its life.

[0058] As an example, when the air filter backflush device is applied to some engineering equipment that does not have a main air tank, such as an excavator, etc., it can be as follows Figure 4As shown, the bottom of the gas tank 203 is connected to the air pump 400, which is used to inflate the gas tank 203 from bottom to top. Since the release valve 204 as described in the previous embodiment deflates the gas tank 203 at the upper end, and cooperates with the drain valve 233 to control the liquid level in the gas tank 203, the liquid will not be pumped into the first air outlet 2131a under the action of the air pump. Figure 4 The air pump 400 is illustratively covered in a protective cover.

[0059] In addition, the gas tank 203 is provided with a pressure switch 232 which is triggered when the gas tank 203 reaches a preset pressure. Figure 8 As shown, the pressure switch 232 can be electrically connected to the air pump 400. Exemplarily, the air pump 400 can generate a switch signal when the air pressure reaches the lower threshold or the upper threshold, and transmit the switch signal to the air pump 400 to make the air pump 400 operate. For example, when the air pressure of the gas tank 203 reaches the lower threshold, the pressure switch 232 generates a first switch signal, and the first switch signal triggers the air pump 400 to start pumping air into the gas tank 203. When the air pressure of the gas tank 203 reaches the upper threshold, the pressure switch 232 generates a second switch signal, and the second switch signal triggers the air pump 232 to stop pumping. The threshold range formed by the lower threshold and the upper threshold can be, for example, 8kg to 10kg pressure in the previous embodiment. Therefore, in this example, the pressure switch 232 and the air pump 400 can be connected to each other to form a control loop, and the air pump 400 can be triggered to start or stop working in two states without the participation of the controller 205. Of course, the air pump 400 and the pressure switch 232 may also be connected via the controller 205 to achieve more diverse control modes, such as timed air pumping and other functions.

[0060] It should be noted that the main gas tank 300 and the regulating valve 301 as well as the pressure switch 232 and the air pump 400 are optional configurations respectively applied to different engineering equipment, so the optional configuration is indicated by dotted lines in the figure.

[0061] like Figure 7 Shown, displayed Figure 4 Schematic diagram of the structure of the first cylinder 201a after radial sectioning.

[0062] exist Figure 7 In the embodiment, an annular stopper 217a may be further provided in the first cylinder 201a. The annular stopper 217a is provided in the first accommodation space 212a of the first cylinder 201a, and is located between the inner surface of the side wall and the first filter element ( Figure 7The bottom edge of the annular stopper 217a abuts against the inner surface of the ventilation end 213a and passes through each of the first air inlet holes 214a. Figure 5 and Figure 6 It can be seen from the embodiment that the first air inlet through hole 214a and the second air inlet through hole 215a are used for air intake during air filtration on the one hand, and for dust removal during self-cleaning of the first air filter unit 200a on the other hand. The bottom edge of the annular stopper 217a abuts against the surface of the ventilation end 213a and passes through each of the first air inlet through holes 214a, that is, each first air inlet through hole 214a is divided into two through hole parts 2141a, the first through hole part 2141a is located between the inner surface of the side wall of the first cylinder 201a and the outer side surface of the annular stopper 217a, and the second through hole part 2142a is located between the inner side surface of the annular stopper 217a and the first filter element 216a. Therefore, when water enters from the second air inlet through hole 215a, it is blocked by the outer side surface of the annular stopper 217a and falls to be discharged from the first through hole part 2141a, which helps to enhance the drainage effect. When the first filter element 216a is self-cleaned, the dust falling from the lower part of the first filter element 216a located on the inner side of the annular stopper 217a can be blocked by the inner side of the annular stopper 217a and directly discharged from the second through hole portion 2142a, while the dust falling from the rest of the annular stopper 217a can also be discharged from the first through hole portion 2141a and the second through hole portion 2142a, thereby enhancing the dust discharge effect. It can be seen that by setting the annular stopper 217a to a suitable position, both the drainage and dust discharge effects can be enhanced.

[0063] In summary, the embodiments of the present disclosure provide an air filter assembly and an air filter back-blowing device used therein, wherein the assembly comprises: a cylinder, comprising: a connected end to be closed, a containing space, and a ventilation end opposite to the end to be closed; wherein the periphery of the end to be closed is bent and extended in the direction opposite to the ventilation end to form a curling edge; the ventilation end is provided with an air outlet; an end cover is provided on the end to be closed; the edge of the end cover is in abutment with the curling edge in a shape-matching manner, and the end cover is rotatably provided with a plurality of buckles in the circumferential direction, which can be rotated to make the outer end of the buckle inverted on the curling edge to position the end cover on the cylinder, and form a seal at the abutment portion between the end cover and the curling edge. The air filter assembly can achieve sealing and mutual fixation through the structural cooperation between the end cover and the end to be closed of the cylinder, which effectively reduces the cost of using air filter devices in engineering equipment.

[0064] The above embodiments are merely illustrative of the principles and effects of the present disclosure, and are not intended to limit the present disclosure. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present disclosure. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present disclosure shall still be covered by the claims of the present disclosure.

Claims

1. An air filter assembly, characterized in that: include: The cylinder comprises: a connected end to be closed, a receiving space and a vent end opposite to the end to be closed; wherein the periphery of the end to be closed is bent and extended toward the vent end opposite to form a curling edge; and the vent end is provided with an air outlet; An end cover is provided at the end to be closed; the edge of the end cover abuts against the curling edge in a shape-matched manner, and the end cover is rotatably provided with a plurality of buckles, which are rotated until the outer ends of the buckles are inverted against the curling edge to position the end cover on the cylinder body and form a seal at the abutment portion between the end cover and the curling edge.

2. The air filter assembly according to claim 1, characterized in that include: The filter element is annular, and its two ends are respectively abutted against the end cap and the vent end and arranged in the accommodation space, so as to divide the accommodation space into a pre-filtration area outside the ring of the filter element and a post-filtration area inside the ring; The air outlet is located within the ring of the filter element.

3. The air filter assembly according to claim 1 or 2, characterized in that: The air outlet is provided with a sleeve assembly; The sleeve assembly comprises: an inner tube connected to the air outlet and provided with a through-hole for outputting the filtered airflow; An outer tube is sleeved on the outside of the inner tube and its end away from the cylinder is air-tightly connected to the inner tube; an air flow channel with a jet port connected to the accommodating space is formed between the outer tube and the inner tube, and the jet port is formed by the other end of the outer tube close to the cylinder and the inner tube. The outer tube is connected to a pipeline for transmitting dust-removing air flow to the filter element in the cylinder to flow the dust-removing air flow into the air flow channel.

4. The air filter assembly according to claim 1, characterized in that The abutting portion is a curved surface or an undulating surface; and / or, at least one pair of handles is provided on the surface of the end cover facing away from the cylinder.

5. An air filtration backflush device, characterized in that: Supply air filtration for engines of engineering equipment, the air filtration back-flushing device includes: A first air filter unit, based on the structural construction of the air filter assembly according to any one of claims 1 to 4; the first air filter unit comprises a first cylindrical body, the first cylindrical body comprising a first accommodating space; a first air outlet is provided at a vent end of the first cylindrical body; a group of first air inlet holes are circumferentially provided on an end surface of the vent end of the first cylindrical body, and a group of second air inlet holes are circumferentially provided along a side wall of the first cylindrical body; a first filter element is provided in the first cylindrical body, and the first air inlet holes are located between the first filter element and the side wall of the first cylindrical body; a gas storage tank connected to the first accommodating space via the first gas outlet; wherein the gas pressure in the gas storage tank is higher than the gas pressure in the first accommodating space; a release valve, configured to be set to a valve state to open / close the pipeline from the gas storage tank to the first gas outlet, so as to release the dust removal airflow from the gas storage tank through the first gas outlet to the first filter element when the pipeline is open; The controller is electrically connected to and sets the valve state of the release valve.

6. The air filtering back-flushing device according to claim 5, characterized in that: include: A second air filter unit, based on the structural structure of the air filter assembly according to any one of claims 1 to 4; the second air filter unit comprises a second cylinder, and a side wall of the second cylinder is provided with an air inlet connected to the first air outlet by a pipeline; The ventilation end of the second cylinder is provided with a second air outlet for communicating with the engine.

7. The air filtering back-flushing device according to claim 6, characterized in that: The air inlet and the first air outlet are connected through a straight line, and the first central axis of the air inlet intersects with the second central axis of the second cylinder.

8. The air filtering back-flushing device according to claim 5, characterized in that: include: An annular baffle is provided in the first accommodating space of the first cylinder, located between the side wall of the first cylinder and the first filter element and corresponding to each of the second air inlet holes; the bottom edge of the annular baffle abuts against the surface of the ventilation end and passes through each of the first air inlet holes.

9. The air filtering back-flushing device according to claim 5, characterized in that: The gas storage tank is connected to the main gas tank of the engineering equipment through a pipeline provided with a regulating valve; the gas storage tank is provided with a pressure sensor; the controller is electrically connected to the pressure sensor and the regulating valve to set the opening of the regulating valve according to the pressure signal of the pressure sensor.

10. The air filtering back-flushing device according to claim 5, characterized in that: The release valve is located at the upper end of the gas tank; and / or; a drain valve is provided at the bottom of the gas tank; and / or, the gas tank is arranged upright; and / or, the gas tank is provided with a pressure switch triggered when the gas tank reaches a preset air pressure, the bottom of the gas tank is connected to the air pump, and the pressure switch is electrically connected to the air pump.

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