Air filtering and blowback assembly and air filtering and blowback device applied by air filtering and blowback assembly

Abstract

The embodiment of the utility model relates to the technical field of air filtration of engineering equipment, and provides an air filtration back-blowing assembly and an air filtration back-blowing device applied to the air filtration back-blowing assembly, the air filtration back-blowing assembly comprises a first barrel, a second barrel and a third barrel, the first barrel comprises a first closed end and a first ventilation end, and the first closed end and the first ventilation end are communicated; the first ventilation end is provided with a first air outlet; a group of first air inlet through holes are formed in the end face of the first ventilation end of the first barrel in the circumferential direction, and a group of second air inlet through holes are formed in the side wall of the first barrel in the circumferential direction; the two ends of the first filter element abut against the first closed end and the first ventilation end respectively and are arranged in the first containing space. The first air inlet through hole is positioned between the first filter element and the side wall of the first barrel; the annular blocking piece is located between the side wall of the first barrel and the first filter element and corresponds to the second air inlet through holes, and the bottom edge of the annular blocking piece abuts against the surface of the first ventilation end and passes through the first air inlet through holes. The first air inlet through hole is segmented through the annular blocking piece, the water drainage and dust exhaust effects are enhanced, the functions are diversified, and the effect is good.

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 backflush assembly and an air filtration backflush device using the same. 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] In the related technology, some equipment uses self-cleaning air filter elements, which usually achieve cleaning by airflow impacting the air filter element to knock down dust. However, under the diversified functional requirements, how to find a structure that takes into account the cleaning function while also achieving other functions, so as to improve product competitiveness, has become a technical problem that needs to be solved urgently in the industry. 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 backflush 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 backflush assembly, comprising: a first cylinder, comprising: a first closed end, a first accommodating space and a first ventilation end opposite to the first closed end; the first ventilation end is provided with a first air outlet; the first cylinder is provided with a group of first air inlet holes along the circumferential direction on the end surface of the first ventilation end, and a group of second air inlet holes along the circumferential direction of the side wall of the first cylinder; a first filter element is annular, and its two ends are respectively arranged in the accommodating space in abutment with the first closed end and the first ventilation end, so as to divide the pre-filtration area outside the ring of the first filter element and the post-filtration area inside the ring in the accommodating space, and the air outlet is located in the ring of the filter element; the first air inlet hole is located between the first filter element and the side wall of the first cylinder; an annular stopper is arranged in the first accommodating space of the first cylinder, between the side wall of the first cylinder and the first filter element and corresponds to each of the second air inlet holes; the bottom edge of the annular stopper is in abutment with the surface of the first ventilation end and passes through each of the first air inlet holes.

[0006] In an embodiment of the first aspect, the group of second air inlet through holes is arranged close to the first ventilation end; and the annular blocker is arranged to block the group of second air inlet through holes.

[0007] In an embodiment of the first aspect, the group of second air inlet through holes are distributed in a circumferential array along the side wall.

[0008] In an embodiment of the first aspect, a sleeve assembly is provided at the first air outlet; the sleeve assembly comprises: an inner tube, connected to the first 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 first cylinder is airtightly connected to the inner tube; an airflow channel having a jet port connected to the first 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 first cylinder and the inner tube, and the outer tube is connected to a pipeline for transmitting dust-removing airflow to the first filter element in the first cylinder, so as to flow the dust-removing airflow into the airflow channel.

[0009] In an embodiment of the first aspect, an edge of the inner tube at one end close to the first cylinder is inclined toward the first filter element so that the air jet is directed toward the first filter element.

[0010] A second aspect of the present disclosure provides an air filter backflush device, which is used for air filtration of engines of engineering equipment, and the air filter backflush device includes: a first air filter unit, based on the structural structure of the air filter backflush assembly as described in any one of the first aspects; an air storage tank, connected to the first containing space via the first air outlet; wherein the air pressure in the air storage tank is higher than the air pressure in the first containing space; a release valve, which is used to be set to 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 containing space 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.

[0011] In an embodiment of the second aspect, the air filtration back-blowing device includes: a second air filtration unit, including a second cylinder; the second cylinder includes: a second closed end and a second ventilation end opposite to each other, and a second accommodating space between the second closed end and the second ventilation end; a second annular filter element is provided in the second accommodating space, the two ends of which respectively abut the second closed end and the second ventilation end; an air inlet is provided on the side wall of the second cylinder, the air inlet being connected to the first air outlet by a pipeline; the second ventilation end of the second cylinder is provided with a second air outlet for connecting to the engine; the second air outlet is located in the ring of the second filter element.

[0012] 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.

[0013] In an embodiment of the second aspect, the release valve is located at the upper end of the gas storage tank; and / or; a drain valve is provided at the bottom of the gas storage tank; and / or, the gas storage tank is arranged vertically.

[0014] In an embodiment of the second aspect, 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 an air pump, and the pressure switch is electrically connected to the air pump.

[0015] As described above, the disclosed embodiments relate to the technical field of air filtration of engineering equipment, and provide an air filter backflush assembly and an air filter backflush device used therein, wherein the air filter backflush assembly comprises: a first cylinder, comprising: a first closed end, a first accommodating space and a first ventilation end opposite to the first closed end; the first ventilation end is provided with a first air outlet; the first cylinder is provided with a group of first air inlet holes along the circumferential direction on the end face of the first ventilation end, and a group of second air inlet holes along the circumferential direction of the side wall of the first cylinder; the first filter element is annular, and its two ends are respectively connected to the first sealing end The closed end and the first ventilation end are disposed in contact with each other in the accommodation space to divide the pre-filtration area outside the ring of the first filter element and the post-filtration area inside the ring in the accommodation space, and the air outlet is located inside the ring of the filter element; the first air inlet hole is located between the first filter element and the side wall of the first cylinder; the annular baffle is disposed in the first accommodation 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 first ventilation end and passes through each of the first air inlet holes. The setting of the annular baffle divides the first air inlet hole, strengthens the drainage and dust removal effects, has diversified functions and good effects, and improves product competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0018] Figure 3 A schematic diagram showing the structure of an air filtering back-blowing device in one embodiment of the present disclosure is shown.

[0019] Figure 4 A schematic diagram of a longitudinal cross-section structure showing an air filter backflush device from one perspective in one embodiment of the present disclosure.

[0020] Figure 5 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.

[0021] Figure 6 exhibit Figure 3 Schematic diagram of the structure of the first cylinder after radial sectioning.

[0022] Figure 7 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

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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. In the related art, some equipment uses a self-cleaning air filter element, which usually achieves cleaning by impacting the air filter element with airflow to knock off dust. However, under the diversified functional requirements, how to find a structure that takes into account the cleaning function while also realizing other functions, thereby improving product competitiveness, has become a technical problem that needs to be solved urgently in the industry.

[0033] In view of this, the embodiments of the present invention provide an air filter back-blowing assembly and an air filter back-blowing device using the same. The air filter back-blowing 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 back-blowing assembly.

[0034] like Figure 1 As shown, a schematic diagram of the structure of an air filter backflush assembly from one perspective in one embodiment of the present disclosure is shown.

[0035] exist Figure 1 In the figure, the air filter backflush assembly 100 is exemplarily shown to include a first barrel 101. The first barrel 101 includes a first closed end 111, a first accommodating space 112, and a first ventilation end 113 opposite to the first closed end 111. As an example, the first barrel 101 is cylindrical, and its upper end is the first closed end 111. Exemplarily, the first closed end 111 can be sealed and closed by a first end cover 102. It can be understood that the end cover 102 is detachable, and when it is removed, the opening of the first closed end 111 will be exposed, and the opening is connected to the first accommodating space 112 of the first barrel 101 inwardly.

[0036] exist Figure 1 In the embodiment, the lower end of the first cylinder 101 opposite to the first closed end 111 is the first ventilation end 113. Figure 2 As shown, the first ventilation end 113 is provided with a first air outlet 1131, and the first air outlet 1131 is connected to the first accommodating space 112 in the first cylinder 101. Exemplarily, a flange ring may be fixedly provided on the first ventilation end 113 of the first cylinder 101, and the inner hole of the flange ring serves as the first air outlet 1131. Optionally, a group of first air inlet holes 114 may be circumferentially provided on the end surface of the first ventilation end 113, and a group of second air inlet holes 115 may be circumferentially provided on the side wall of the first cylinder 101, and the group of second air inlet holes 115 may be located on the portion of the side wall connected to the first ventilation end 113. It should be noted that Figure 2 Although the air filter back-blowing assembly 100 is provided with the first air inlet hole 114 and the second air inlet hole 115, the air filter back-blowing 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.

[0037] For reference Figure 4 and Figure 5 As shown, the first accommodating space 112 can be used to set a first filter element 116 ( Figures 1 to 3Not shown in the figure). Exemplarily, the first filter element 116 can be made of paper. Exemplarily, the first filter element 116 can be annular, such as a circular ring, and the first filter element 116 can be coaxially arranged with the first cylinder 101, and the two ends of the filter element are respectively arranged in the first accommodating space 112 to abut against the first closed end 111 and the first ventilation end 113, so as to divide the first accommodating space 112 into a pre-filtration area outside the ring of the first filter element 116 and a post-filtration area inside the ring, and the first air outlet 1131 is located on one side of the filter element ring. The matching structure of the first cylinder 101 and the first filter element 116 can be referred to later. Figure 4 and Figure 5 shown.

[0038] In addition, you can refer to Figure 6 As shown, the air filter backflush assembly 100 may further include an annular stopper 117, which is disposed in the first accommodation space 112, between the side wall of the first cylinder and the first filter element 116 and corresponding to each of the second air inlet holes; the bottom edge of the annular stopper 117 abuts against the surface of the first ventilation end and passes through each of the first air inlet holes.

[0039] As an example, the air filter backflush assembly 100 can be applied to an air filter backflush device. The air filter backflush device can include one or more air filter units, wherein a first-stage air filter unit can be implemented based on the air filter backflush assembly 100, such as a first-stage air filter unit.

[0040] like Figure 3 As shown, a schematic diagram of the structure of an air filtering back-blowing device in one embodiment of the present disclosure is shown.

[0041] The air filtering back-flushing device at least includes a first air filtering unit 100 , an air storage tank 103 , a release valve 104 and a controller 105 .

[0042] The first air filter unit 100 includes an air filter backflush assembly as described in any of the previous embodiments. Specifically, the first air filter unit 100 includes a first cylinder 101, a first closed end 111, a first accommodating space and a first ventilation end 113, etc. The first ventilation end 113 is provided with a first air outlet 1131. As an example, the first closed end 111 of the first cylinder 101 is covered by a first end cover 102 to form a sealed closure, and the first closed end 111 is shown as the upper end in the figure, and the first air outlet 1131 is located at the first ventilation end 113 of the first cylinder 101, which is shown as the lower end in the figure. The first cylinder 101 is provided with a group of first air inlet through holes 114 (reference Figure 4 ), and a group of second air inlet holes 115 are arranged along the circumference of the side wall of the first cylinder 101.

[0043] Can be referenced together Figure 4 As shown, a first filter element 116 is disposed in the first cylinder 101. The first filter element 116 may be annular and coaxially disposed with the first cylinder 101. The two ends are disposed in the first cylinder 101 in abutment with the first closed end 113 (which may abut the first end cap 102) and the first ventilation end 113, respectively, so as to divide the first accommodating space 112 into a pre-filtering area 1121 outside the ring of the first filter element 116 and a post-filtering area 1122 inside the ring. The first filter element and the first air outlet 1131 of the first cylinder 101 are located in the ring of the first filter element 116. The first air inlet through hole 114 is located between the first filter element 116 and the side wall of the first cylinder 101.

[0044] The gas storage tank 103 is connected to the first accommodation space 112 through the first gas outlet 1131. The gas pressure in the gas storage tank 103 is higher than the gas pressure in the first accommodation space 112. In some embodiments, the gas storage tank 103 stores gas at a pressure of 8kg to 10kg.

[0045] The release valve 104 is used to be set to a valve state to open / close the pipeline from the gas tank 103 to the first accommodation space 112, so as to release the dust removal airflow from the gas tank 103 through the first accommodation space 112 to the first filter element 116 when the pipeline is open. As an example, the release valve 104 can be a pulse solenoid valve.

[0046] See also Figure 7 As shown, Figure 7 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 105 is electrically connected to and sets the valve state of the release valve 104. As an example, the controller 105 can trigger the release valve 104 to conduct the pipeline each time through a pulse signal. In some embodiments, the controller 105 can be implemented based on an MCU, a SoC, a CPU, or an FPG.

[0047] Specifically, if Figure 4As shown, the first air filter unit 100 can realize the self-cleaning function. When self-cleaning is required, the controller 105 sends a pulse signal to the release valve 104, sets the valve state of the release valve 104 to conduct the pipeline from the gas tank 103 to the first gas outlet 1131, and the high-pressure gas in the gas tank 103 rushes into the first cylinder 101 from the air flow channel, and reaches the post-filter area 1122 as a dust removal airflow. Since the external air enters from the first air inlet hole 114 and the second air inlet hole 115 and passes through the first filter element 116 from the pre-filter area 1121 to the post-filter area 1122, the dust will be filtered and retained on the surface of the first filter element 116 located in the pre-filter area 1121, as shown by the arrow in the figure. The dust removal airflow will cause the dust attached to the first filter element 116 to fall off and be discharged from the first air inlet hole 114 and the second air inlet hole 115 near the lower end. Thereby, the self-cleaning of the first air filter unit 100 is realized.

[0048] 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 7 As shown, a flow sensor 107 can be provided, electrically connected to the controller 105. 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 116 reaches a condition that requires the initiation of a self-cleaning action, and the controller 105 can output the pulse signal to perform the self-cleaning action. In some embodiments, the first air outlet 1131 can be connected to a transfer tube, and the two ends of the transfer tube are respectively connected to the first accommodating space 112 in the first cylinder 101 and the next-level equipment (such as the next-level filter unit or the engine, etc.), and the gas storage tank 103 can be connected to the side wall of the transfer tube by a pipeline, and the flow sensor 107 can be provided in the transfer tube.

[0049] exist Figure 4In an embodiment, the transfer tube can be implemented as a sleeve assembly 108, which is arranged at the first air outlet 1131. Optionally, the sleeve assembly 108 can be in airtight contact with the first air outlet 1131a. The sleeve assembly 108 includes an inner tube 181 and an outer tube 182, the inner tube 181 is connected to the first air outlet 1131, and is provided with a through opening for outputting the filtered airflow, that is, the lower end opening in the figure. The outer tube 182 is sleeved outside the inner tube 181 and its end away from the first cylinder 101 is airtightly connected to the inner tube 181; the outer tube 182 and the inner tube 181 are spaced to form an airflow channel 183 having an air jet 1831 connected to the first accommodating space, and the air jet 1831 is formed by the other end of the outer tube 182 and the inner tube 181. The airflow channel 183 is provided for the dust removal airflow to pass into the first filter element 116 in the first cylinder 101. As an example, the outer tube 182 may be provided with a vent to communicate with the pipeline of the gas storage tank 103. The edge of the inner tube 181 close to one end (i.e., the upper end in the figure) inside the first cylinder 101 is tilted outward to guide the dust removal airflow ejected from the jet port 1831 to impact the inner side of the first filter element 116 outward, thereby realizing the structure of the "annular trumpet jet port", which helps to improve the cleaning effect of the first filter element 116.

[0050] Can be referenced together Figure 6 Shown, displayed Figure 3 Schematic diagram of the structure of the first cylinder 101 after being cut along the radial direction.

[0051] exist Figure 6 In the embodiment, an annular stopper 117 is provided in the first cylinder 101. The annular stopper 117 is provided in the first accommodation space 112 of the first cylinder 101, and is located between the inner surface of the side wall and the first filter element ( Figure 6 The bottom edge of the annular stopper 117 abuts against the inner surface of the first ventilation end 113 and passes through each of the first ventilation holes 114. Figure 4 and Figure 5It can be seen from the embodiment that the first air inlet through hole 114 and the second air inlet through hole 115 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 100 on the other hand. The bottom edge of the annular stopper 117 abuts against the surface of the first ventilation end 113 and passes through each of the first air inlet through holes 114, that is, each first air inlet through hole 114 is divided into two through hole parts 1141, the first through hole part 1141 is located between the inner surface of the side wall of the first cylinder 101 and the outer side surface of the annular stopper 117, and the second through hole part 1142 is located between the inner side surface of the annular stopper 117 and the first filter element 116. Therefore, when water enters from the second air inlet through hole 115, it is blocked by the outer side surface of the annular stopper 117 and falls to be discharged from the first through hole part 1141, which helps to enhance the drainage effect. When the first filter element 116 is self-cleaned, the dust falling from the lower part of the first filter element 116 located on the inner side of the annular block 117 can be blocked by the inner side of the annular block 117 and discharged directly from the second through hole portion 1142, while the dust falling from the rest of the annular block 117 can also be discharged from the first through hole portion 1141 and the second through hole portion 1142, thereby enhancing the dust discharge effect. It can be seen that by setting the annular block 117 to a suitable position, both the drainage and dust discharge effects can be enhanced.

[0052] exist Figure 3 In the embodiment, the air filter backflush device further comprises a second air filter unit 100a, which is connected as a rear stage of the first air filter unit 100. The second air filter unit 100a is also implemented based on the air filter backflush assembly, but the second air filter unit 100a does not need to be provided with the first air inlet through hole 114 and the second air inlet through hole 115. The second air filter unit 100a comprises a second cylinder 101a and a second end cover 102a, and the second closed end 111a of the second cylinder 101a covers the second end cover 102a, and can be referred to together Figure 4 and Figure 5As shown, the first ventilation end 113a opposite to the first closed end 111a is provided with a second air outlet 1131a for connecting to the engine. The side wall of the second cylinder 101a is provided with an air inlet 110a connected to the first air outlet 1131 through a pipeline. A second accommodating space 112a connecting the air inlet 110a and the second air outlet 1131a is formed in the second cylinder 101a, for setting a second filter element 116a whose two ends are respectively abutted against the first closed end 111a and the second end cover 102a, and the second filter element 116a is coaxially arranged with the second cylinder 101a. Exemplarily, the first air filter unit 100 and the second air filter unit 100a can be of the same size structure, and the second filter element 116a and the first filter element 116 can be the same, and can be used as a spare for the first filter element 116 to improve the reliability of the air filtration back-blowing device.

[0053] like Figure 5 As indicated by the middle arrow, the airflow entering the first cylinder 101 passes through the first filter element 116, flows downward from the first air outlet 1131 into the air inlet 110a of the second cylinder 101a, passes through the second filter element 116a, and flows out of the second cylinder 101a from the second air outlet 1131a. After two-stage filtration, the air enters the engine to provide clean air.

[0054] For example, reference may be made to Figure 4 As shown, the air inlet 110a and the first air outlet 1131 are connected by a straight line, which is exemplified by the sleeve assembly 108, and the sleeve assembly 108 extends along a straight line. The first central axis Y where the air inlet 110a and the first air outlet 1131 coincide with the center O of the second cylinder, that is, the first air filter unit 100 and the second air filter unit 100a are connected in the middle of the radial direction of the second air filter unit 100a. Figure 4 As shown in the example, the first air filter unit 100 can be placed vertically, and its central axis can be colinear with the central axis of the first air outlet 1131. The second air filter unit 100a can be placed horizontally, and the central axis of the second air filter unit 100a is perpendicular to and intersects with the central axis of the first air outlet 1131, and the central axis of the first air outlet 1131 passes through the center of the second air filter unit 100a. Under this structure, the air outlet of the first air outlet 1131 enters the second cylinder 101a in the radial direction of the second cylinder 101a, and compared with the eccentric connection mode in which the first air outlet 1131 deviates from the central axis of the second cylinder 101a, no swirl will be generated, thus avoiding the energy loss of the airflow and ensuring sufficient intake flow.

[0055] In addition, illustratively, Figure 3 and Figure 4As shown, the gas tank 103 can be arranged vertically. The release valve 104 can be located at the upper end of the gas tank 103, and a drain valve 133 is provided at the bottom of the gas tank 103. The advantage of the release valve 104 being arranged at the upper end of the gas tank 103 is that there may be both gas and liquefied liquid in the gas tank 103, and when spraying the dust removal airflow, it is necessary to spray gas and avoid liquid from spraying onto the first filter element 116 (generally non-washable paper) and causing damage. Therefore, the release valve 104 releases gas at the upper end of the gas tank 103, and the liquid is released at the bottom through the drain valve 133, 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 1131 together with the gas.

[0056] As an example, Figure 3 As shown, on some engineering equipment with a main gas tank 200, such as an off-road mining truck, the main gas tank can be used to supply gas to the gas storage tank 103. Specifically, the gas storage tank 103 can be connected to the main gas tank 200 via a pipeline provided with a regulating valve 201. The gas storage tank 103 can be provided with a pressure sensor. Figure 7 As shown, the controller 105 is electrically connected to the pressure sensor 134 and the regulating valve 201 to set the opening of the regulating valve 201 according to the pressure signal of the pressure sensor 134, for example, by adjusting the opening of the regulating valve 201 to adjust the pressure of the high-pressure gas output from the main gas tank 200 to the gas storage tank 103. Exemplarily, the gas storage tank 103 may also be provided with a pressure sensor 134, which is electrically connected to the controller 105, and is used to detect the pressure signal of the gas pressure of the gas storage tank 103 and transmit it to the controller 105. The controller 105 may adjust the opening of the regulating valve 201 according to the gas pressure of the gas storage tank 103. For example, if the gas pressure in the gas storage tank 103 is higher than a preset threshold, the opening of the regulating valve 201 may be increased accordingly to reduce the pipeline gas pressure; conversely, if the gas pressure in the gas storage tank 103 is too low, the opening of the regulating valve 201 may also be reduced to increase the gas pressure.

[0057] It is understandable that when the release valve 104 used in the gas tank 103 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 103. Excessive air pressure may spray out dust removal airflow that exceeds the pressure that the first filter element 116 can withstand, thereby damaging the first filter element 116 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 3As shown, the bottom of the gas tank 103 is connected to the air pump 300, and the air pump 300 is used to inflate the gas tank 103 from bottom to top. Since the release valve 104 as described in the previous embodiment deflates the gas tank 103 at the upper end, and cooperates with the drain valve 133 to control the liquid level in the gas tank 103, the liquid will not be pumped into the first air outlet 1131 under the action of the air pump. Figure 3 The air pump 300 is illustratively covered in a protective cover.

[0059] In addition, the gas tank 103 is provided with a pressure switch 132 which is triggered when the gas tank 103 reaches a preset pressure. Figure 7 As shown, the pressure switch 132 can be electrically connected to the air pump 300. Exemplarily, the air pump 300 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 300 to make the air pump 300 operate. For example, when the air pressure of the gas tank 103 reaches the lower threshold, the pressure switch 132 generates a first switch signal, and the first switch signal triggers the air pump 300 to start pumping air into the gas tank 103. When the air pressure of the gas tank 103 reaches the upper threshold, the pressure switch 132 generates a second switch signal, and the second switch signal triggers the air pump 132 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 132 and the air pump 300 can be connected to each other to form a control loop, and the air pump 300 can be triggered to start or stop working in two states without the participation of the controller 105. Of course, the air pump 300 and the pressure switch 132 may also be connected via the controller 105 to achieve more diverse control modes, such as timed air pumping and other functions.

[0060] It should be noted that the main gas tank 200 and the regulating valve 201 are optional configurations for use with different engineering equipment as well as the pressure switch 132 and the air pump 300, and therefore the optional configurations are indicated by dotted lines in the diagram.

[0061] In summary, the embodiments of the present disclosure relate to the technical field of air filtration of engineering equipment, and provide an air filter backflush assembly and an air filter backflush device used therein, wherein the air filter backflush assembly comprises: a first cylinder, comprising: a first closed end, a first accommodating space and a first ventilation end opposite to the first closed end; the first ventilation end is provided with a first air outlet; the first cylinder is provided with a group of first air inlet holes along the circumferential direction on the end face of the first ventilation end, and a group of second air inlet holes along the circumferential direction of the side wall of the first cylinder; the first filter element is annular, and its two ends are respectively connected to the first closed end. The closed end and the first ventilation end are disposed in contact with each other in the accommodation space to divide the pre-filtration area outside the ring of the first filter element and the post-filtration area inside the ring in the accommodation space, and the air outlet is located inside the ring of the filter element; the first air inlet hole is located between the first filter element and the side wall of the first cylinder; the annular baffle is disposed in the first accommodation 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 first ventilation end and passes through each of the first air inlet holes. The setting of the annular baffle divides the first air inlet hole, strengthens the drainage and dust removal effects, has diversified functions and good effects, and improves product competitiveness.

[0062] 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 backflush assembly, characterized in that: include: The first cylinder comprises: a first closed end, a first accommodating space and a first ventilation end opposite to the first closed end; the first ventilation end is provided with a first air outlet; the first cylinder is provided with a group of first air inlet holes along the circumferential direction on the end surface of the first ventilation end, and a group of second air inlet holes along the circumferential direction of the side wall of the first cylinder; The first filter element is annular, and its two ends are respectively disposed in the first accommodating space in contact with the first closed end and the first vent end, so as to divide the first accommodating space into a pre-filtering area outside the ring of the first filter element and a post-filtering area inside the ring, and the air outlet is located inside the ring of the filter element; the first air inlet through hole is located between the first filter element and the side wall of the first cylinder; An annular baffle is arranged in the first accommodating space, 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 first ventilation end and passes through each of the first air inlet holes.

2. The air filter backflush assembly according to claim 1, characterized in that: The group of second air inlet holes is arranged close to the first ventilation end; and the annular blocking member is arranged to block the group of second air inlet holes.

3. The air filter backflush assembly according to claim 2, characterized in that: The group of second air inlet holes are distributed in an array along the circumference of the side wall.

4. The air filter backflush assembly according to claim 1, characterized in that: The first air outlet is provided with a sleeve assembly; the sleeve assembly comprises: An inner tube connected to the first air outlet and provided with a through opening for outputting the filtered airflow; An outer tube is sleeved outside the inner tube and one end of which is away from the first cylinder is airtightly connected to the inner tube; an airflow channel with a jet port connected to the first 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 first cylinder and the inner tube. The outer tube is connected to a pipeline for transmitting dust-removing airflow to the first filter element in the first cylinder, so as to flow the dust-removing airflow into the airflow channel.

5. The air filter backflush assembly according to claim 4, characterized in that: The edge of the inner tube close to one end of the first cylinder is inclined toward the first filter element so that the air jet is directed toward the first filter element.

6. An air filter backflush device, characterized in that: Supply air filtration for engines of engineering equipment, the air filtration backflush device comprises: A first air filter unit, based on the structural construction of the air filter backflush assembly according to any one of claims 1 to 5; A gas storage tank connected to the first containing space through the first gas outlet; wherein the gas pressure in the gas storage tank is higher than the gas pressure in the first containing space; A release valve, which is used 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 accommodating space to the first filter element when the pipeline is connected; A controller is electrically connected to and sets the valve state of the release valve.

7. The air filter backflush device according to claim 6, characterized in that: include: The second air filter unit comprises a second cylinder; the second cylinder comprises: a second closed end and a second ventilation end opposite to each other, and a second accommodation space between the second closed end and the second ventilation end; The second accommodating space is provided with an annular second filter element whose two ends respectively abut the second closed end and the second ventilation end; the side wall of the second cylinder is provided with an air inlet connected to the first air outlet through a pipeline; the second ventilation end of the second cylinder is provided with a second air outlet for connecting to the engine; The second air outlet is located within the ring of the second filter element.

8. The air filter backflush device according to claim 6, 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.

9. The air filter backflush device according to claim 6, characterized in that: The release valve is located at the upper end of the gas storage tank; and / or; a drain valve is provided at the bottom of the gas storage tank; and / or, the gas storage tank is arranged vertically.

10. The air filtering back-flushing device according to claim 6, characterized in that: The gas tank is provided with a pressure switch which is triggered when the gas tank reaches 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.

Images