CN117753131A

CN117753131A - Circuit control system applied to air filtering backflushing device and applied device

Info

Publication number: CN117753131A
Application number: CN202410131481.3A
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Shanghai Filtration Intelligent Technology Co ltd
Current assignee: Shanghai Filtration Intelligent Technology Co ltd
Priority date: 2024-01-31
Filing date: 2024-01-31
Publication date: 2024-03-26

Abstract

Embodiments of the present disclosure provide a circuit control system for an air filtration backflushing device and an applied device, the device including: the air filter comprises a first air filtering unit, an air storage tank and a release valve; the ventilation end of the first cylinder body is provided with a first air outlet, and the air storage tank is communicated with the first accommodating space through the first air outlet; a release valve for being set with a valve state to open/close a pipeline from the air tank to the first air outlet; the circuit control system includes: the air conditioner comprises a first flow sensor, a first pressure sensor, a regulating valve and a controller, wherein the first flow sensor is communicated with the first air outlet, the first pressure sensor is arranged on the air storage tank, the regulating valve is arranged between the air storage tank and a main air pipe, and the controller is in communication connection with the regulating valve. Therefore, the controller can detect filter element dirty by utilizing the first flow sensor to start self-cleaning, and control the gas pressure of the gas storage tank to be in a range according to the feedback of the first pressure sensor, so that good protection effect on the filter element is considered, the service life of the filter element is prolonged, and the product competitiveness is improved.

Description

Circuit control system applied to air filtering backflushing device and applied device

Technical Field

The disclosure relates to the field of air filtration technology of engineering equipment, and in particular relates to a circuit control system applied to an air filtration backflushing device and an applied device.

Background

The air filter of the engineering equipment mainly adopts an air inlet centrifugal filtration (or pre-filtration of mixed air) and two-stage dry filtration combined technology, and the old air filter is replaced by a new air filter at regular intervals, or compressed air is used for soot blowing maintenance for removing the old air filter at irregular intervals to ensure that the filter works normally, so that the air of an air inlet system of an engine is clean, and the normal work of air utilization equipment and the engine is ensured.

In the current air filtering device, a multi-stage air filtering unit structure is adopted, and a high-pressure air flow blowing mode is adopted to realize self-cleaning of the air filtering unit, but the design of the schemes mainly considers the air filtering effect, and the air filtering unit is neglected and can be made of fragile materials such as paper, and the filtering unit can be damaged by improper air flow; i.e. lack of protection.

Disclosure of Invention

In view of the above-described drawbacks of the prior art, an object of the present disclosure is to provide a circuit control system applied to an air filtration backflushing device and an applied device, solving the problems in the related art.

A first aspect of the present disclosure provides a circuit control system for application to an air filtration backflushing device that supplies air filtration for an engine of an engineering plant; the air filtration backflushing device comprises: the air filter comprises a first air filtering unit, an air storage tank and a release valve; a first air filter unit including a first cylinder; the first cylinder includes: a first closed end and a first vented end opposite each other, and a first receiving space between the first closed end and the first vented end; an annular first filter element with two ends respectively abutting against the first closed end and the first ventilation end is arranged in the first cylinder; the ventilation end of the first barrel is provided with a first air outlet which is positioned in the ring of the first filter element; the air storage tank is communicated with 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; the release valve is used for being set in a valve state to open/close a pipeline from the air storage tank to the first air outlet so as to release dust removal air flow from the air storage tank to the first filter element through the first air outlet when the pipeline is conducted; the circuit control system includes: the first flow sensor is communicated with the first air outlet and is used for detecting the air flow of the first air outlet and outputting a first flow signal; the air storage tank is communicated with the main air tank of the engineering equipment through a pipeline provided with an adjusting valve so as to obtain air supplement; the first pressure sensor is arranged in the gas storage tank and is used for detecting the gas pressure of the gas storage tank and outputting a pressure signal; the controller is in communication connection with the first flow sensor and the release valve and is used for controlling the release valve to be conducted so as to form the dust removal airflow in response to the fact that the gas flow corresponding to the flow signal is lower than a first preset flow threshold value; the controller is also in communication connection with the first pressure sensor and the regulating valve, and is used for setting the opening of the regulating valve according to the pressure signal of the first pressure sensor so as to regulate the gas pressure output by the main gas tank to the gas storage tank, so that the gas pressure of the gas storage tank is in a preset gas pressure range.

In an embodiment of the first aspect, the air tank pipeline is communicated with an air pump; the circuit control system includes: the pressure switch is arranged on the air storage tank and used for detecting the air pressure of the air storage tank, and generating different switch signals when the air pressure of the air storage tank is out of a preset air pressure range so as to trigger the operation or stop of the air pump, and the air pump is used for supplementing air to the air storage tank when in operation.

In an embodiment of the first aspect, the air tank pipeline is communicated with an air pump; the controller is in communication connection with the first pressure sensor, the pressure switch and the inflating pump, and is used for independently or cooperatively controlling the opening of the regulating valve and the operation of the inflating pump according to the pressure signal of the first flow sensor and/or the switch signal of the pressure switch so as to enable the gas pressure of the gas storage tank to be in a preset gas pressure range.

In an embodiment of the first aspect, the controlling the opening of the adjusting valve and the operation of the air pump independently or cooperatively according to the pressure signal of the first flow sensor and/or the switch signal of the pressure switch, so that the air pressure of the air storage tank is within a preset air pressure range includes at least one of the following: 1) Responding to the fact that the current gas pressure represented by the first pressure signal is lower than a preset gas pressure lower limit threshold value, and the controller obtains a comparison result of a pressure difference value of the current gas pressure, which is away from the preset gas pressure lower limit threshold value, and a preset pressure difference threshold value; when the comparison result shows that the pressure difference value of the preset lower limit threshold is higher than the preset pressure difference threshold, firstly setting the opening of the regulating valve to enable the air pressure of the air storage tank to rise to an intermediate air pressure value close to the preset lower limit threshold, and then rising the air pressure of the air storage tank to be within the preset air pressure range through the operation of the inflating pump; 2) The controller adjusts the air pressure of the air storage tank based on the switch signal in preference to adjusting the air pressure of the air storage tank based on the pressure signal; 3) Responsive to the current gas pressure represented by the first pressure signal being above a preset upper gas pressure threshold, the controller stopping the inflation pump and closing the regulator valve; 4) For the controller, the pressure switch and the first flow sensor are primary and standby, and the inflating pump, the primary air tank and the regulating valve are primary and standby facilities for inflating the air storage tank.

In an embodiment of the first aspect, the air filtration backflushing device comprises: a second air filter unit including a second cylinder; the second cylinder includes: a second closed end and a second venting end opposite, and a second receiving space between the second closed end and the second venting end; the side wall of the second cylinder body is provided with an air inlet communicated with the first accommodating space through the first air outlet; an annular second filter element with two ends respectively abutting against the second closed end and the second ventilation end is arranged in the second accommodating space; the ventilation end of the second cylinder body is provided with a second air outlet for communicating with the engine; the second air outlet is located within the ring of the second filter element.

In an embodiment of the first aspect, the circuit control system includes: the second flow sensor is communicated with the second air outlet and is in communication connection with the controller, and is used for detecting the airflow flow of the air discharged by the second air filtering unit and outputting a second flow signal; the controller is further configured to control the release valve to be turned on in response to the first flow signal being lower than a first preset airflow flow threshold and/or the airflow flow corresponding to the second flow signal being lower than a second preset airflow flow threshold, so as to form the dust removal airflow.

In an embodiment of the first aspect, the circuit control system includes: the second pressure sensor is communicated with the air inlet and is connected with the controller in a communication manner and is used for detecting the air inlet pressure of the second air filtering unit and outputting a second pressure signal; the controller is further configured to independently or cooperatively control the opening of the adjusting valve and the operation of the air pump in order to make the air pressure of the air storage tank be within a preset air pressure range, in response to the first flow signal being lower than a first preset air flow threshold and/or the air flow corresponding to the second flow signal being lower than a second preset air flow threshold.

A second aspect of the present disclosure provides an air filtration backflushing device for supplying air filtration for an engine of an engineering plant; the air filtration backflushing device comprises: the device comprises a first air filtering unit, a second air filtering unit, an air storage tank and a release valve; a first air filter unit including a first cylinder; the first cylinder includes: a first closed end and a first vented end opposite each other, and a first receiving space between the first closed end and the first vented end; an annular first filter element with two ends respectively abutting against the first closed end and the first ventilation end is arranged in the first cylinder; the ventilation end of the first barrel is provided with a first air outlet which is positioned in the ring of the first filter element; the air storage tank is communicated with 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; the release valve is used for being set in a valve state to open/close a pipeline from the air storage tank to the first air outlet so as to release dust removal air flow from the air storage tank to the first filter element through the first air outlet when the pipeline is conducted; a second air filter unit including a second cylinder; the second cylinder includes: a second closed end and a second venting end opposite, and a second receiving space between the second closed end and the second venting end; the side wall of the second cylinder body is provided with an air inlet communicated with the first accommodating space through a straight line through the first air outlet; an annular second filter element with two ends respectively abutting against the second closed end and the second ventilation end is arranged in the second accommodating space; the ventilation end of the second cylinder body is provided with a second air outlet for communicating with the engine; the second air outlet is positioned in the ring of the second filter element; and, a circuit control system as in any one of the first aspects.

In an embodiment of the second aspect, the first air outlet is provided with a sleeve assembly; the sleeve assembly includes: the inner pipe is communicated with the first air outlet and the air inlet and is provided with a through port for outputting the filtered air flow; the outer tube is sleeved outside the inner tube, and one end of the outer tube, which is far away from the first cylinder, is connected with the inner tube in an airtight manner; the outer pipe is communicated with a pipeline for conveying dust removal air flow of the first filter element in the first cylinder body so as to enable the dust removal air flow to flow into the air flow channel.

In an embodiment of the second aspect, an edge of the inner tube near an end in the first cylinder is inclined toward the first filter element to direct the air jet toward the first filter element.

As described above, embodiments of the present disclosure provide a circuit control system for an air filtration backflushing device and an apparatus for use therewith, the apparatus comprising: the air filter comprises a first air filtering unit, an air storage tank and a release valve; the ventilation end of the first cylinder body is provided with a first air outlet, and the air storage tank is communicated with the first accommodating space through the first air outlet; a release valve for being set with a valve state to open/close a pipeline from the air tank to the first air outlet; the circuit control system includes: the air conditioner comprises a first flow sensor, a first pressure sensor, a regulating valve and a controller, wherein the first flow sensor is communicated with the first air outlet, the first pressure sensor is arranged on the air storage tank, the regulating valve is arranged between the air storage tank and a main air pipe, and the controller is in communication connection with the regulating valve. Therefore, the controller can detect filter element dirty by utilizing the first flow sensor to start self-cleaning, and control the gas pressure of the gas storage tank to be in a range according to the feedback of the first pressure sensor, so that good protection effect on the filter element is considered, the service life of the filter element is prolonged, and the product competitiveness is improved.

Drawings

Fig. 1 shows a schematic structural diagram of an air filtration blowback device in an embodiment of the present disclosure.

Fig. 2 shows a schematic view of a longitudinal cut-away structure of one view of an air filtration blowback device in an embodiment of the present disclosure.

Fig. 3 shows a schematic view of a longitudinal cut-away structure of another view of an air filtration blowback device in an embodiment of the present disclosure.

Fig. 4 shows a schematic block diagram of an electronic control system of an air filtration blowback device in an embodiment of the present disclosure.

Fig. 5 shows a schematic block diagram of an electronic control system of an air filtration blowback device in another embodiment of the present disclosure.

FIG. 6 is a flow chart of a method of controlling the air supply of the controller in the embodiment of FIG. 5.

Fig. 7 shows a schematic block diagram of an electronic control system of an air filtration blowback device in another embodiment of the present disclosure.

Fig. 8 shows a block diagram of an electronic control system of an air filtration blowback device in another embodiment of the present disclosure.

Detailed Description

Other advantages and effects of the present disclosure will be readily apparent to those skilled in the art from the following detailed description of the embodiments of the disclosure given by way of specific examples. The disclosure may be embodied or applied in other specific forms and details, and various modifications and alterations may be made to the details of the disclosure in various respects, all without departing from the spirit of the disclosure. It should be noted that, without conflict, the embodiments of the present disclosure and features of the embodiments may be combined with each other.

The embodiments of the present disclosure will be described in detail below with reference to the attached drawings so that those skilled in the art to which the present disclosure pertains can easily implement the same. The present disclosure may be embodied in many different forms and is not limited to the embodiments described herein.

In the description of the present disclosure, references to the terms "one embodiment," "some embodiments," "examples," "particular examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or a group of embodiments or examples. Furthermore, various embodiments or examples, as well as features of various embodiments or examples, presented in this disclosure may be combined and combined by those skilled in the art without contradiction.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the representations of the present disclosure, "a set" means two or more, unless specifically defined otherwise.

For the purpose of clarity of the present disclosure, components that are not related to the description are omitted, and the same or similar components are given the same reference numerals throughout the specification.

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" with other elements interposed therebetween. In addition, when a certain component is said to be "included" in a certain device, unless otherwise stated, other components are not excluded, but it means that other components may be included.

Although the terms first, second, etc. may be used herein to connote various elements in some examples, the elements should not be limited by the terms. These terms are only used to distinguish one element from another element. For example, a first interface, a second interface, etc. Furthermore, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes," and/or "including" specify the presence of stated features, steps, operations, elements, modules, items, categories, and/or groups, but do not preclude the presence, presence or addition of one or more other features, steps, operations, elements, modules, items, categories, and/or groups. The terms "or" and/or "as used herein are to be construed as inclusive, or meaning any one or any combination. Thus, "A, B or C" or "A, B and/or C" means "any of the following: a, A is as follows; b, a step of preparing a composite material; c, performing operation; a and B; a and C; b and C; A. b and C). An exception to this definition will occur only when a combination of elements, functions, steps or operations are in some way inherently mutually exclusive.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the language clearly indicates the contrary. The meaning of "comprising" in the specification is to specify the presence of stated features, regions, integers, steps, operations, elements, and/or components, but does not preclude the presence or addition of other features, regions, integers, steps, operations, elements, and/or components.

Although not differently defined, including technical and scientific terms used herein, all terms have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The term append defined in commonly used dictionaries is interpreted as having a meaning that is consistent with the meaning of the relevant technical literature and the currently prompted message, and is not excessively interpreted as an ideal or very formulaic meaning, so long as no definition is made.

Typically, equipment having an engine will be provided with an air filtering blowback device prior to the engine's intake to avoid dust entering the engine to affect operation. Engineering equipment, such as off-highway mining trucks, excavators, etc., may also require air filtration devices for the engine.

In the current air filtering device, a multi-stage air filtering unit structure is adopted, and a high-pressure air flow blowing mode is adopted to realize self-cleaning of the air filtering unit, but the design of the schemes mainly considers the air filtering effect, and the air filtering unit is neglected and can be made of fragile materials such as paper, so that the filtering unit is damaged by improper air flow, namely, a protective measure is lacked.

In view of this, embodiments of the present disclosure may provide a circuit control system for an air filtration backflushing device that can dynamically control the air flow pressure related devices in the air filtration backflushing device to avoid damage caused by improper air flow pressure in the device, such as damage to the filter element.

The air filtration backflushing device is described in the following by way of example.

As shown in fig. 1, a schematic structural diagram of an air filtration blowback device according to an embodiment of the present disclosure is shown.

In fig. 1, the air filtering device is shown to include a first air filtering unit 100a, a second air filtering unit 100b, an air tank 103, a release valve 104, and the like.

The first air filtering unit 100a includes a first cylinder 101a. Referring to fig. 2, the first cylinder 101a includes: an opposite first closed end 111a (upper end is shown) and a first venting end 113a (lower end is shown), and a first receiving space 112a between the first closed end 111a and the first venting end 113 a. As an example, the first closed end 111a of the first cylinder 101a is sealed closed by a removable first end cap 102a to form a closure. The first venting end 113a is provided with a first air outlet 1131a. As an example, the first cylinder 101a may be provided with a set of first air intake through holes 114a (refer to fig. 2) in the circumferential direction at the end face of the ventilation end, and a set of second air intake through holes 115a in the circumferential direction along the side wall of the first cylinder 101a.

Referring to fig. 2 and 3 together, the first filter element 116a is disposed in the first cylinder 101a, and the first filter element 116a may be annular, for example, circular, and disposed coaxially with the first cylinder 101 a. The two ends of the first filter element 116a are respectively abutted against the first closed end 111a and the first ventilation end 113a and arranged in the first cylinder 101a, and the first air outlet 1131a is positioned in the ring of the first filter element 116 a. The first filter element 116a may divide a pre-filtration area 1121a outside the ring of the first filter element 116a and a post-filtration area 1122a inside the ring in the first accommodating space 112a of the first cylinder 101a, and the first filter element 116a and the first air outlet 1131a of the first cylinder 101a may be disposed inside the first filter element 116a and coaxially with the first filter element 116a and the first cylinder 101a, and may share the same first central axis. Of course, in other embodiments, the first air outlet 1131a may not be coaxially disposed with the first filter element 116a and the first cylinder 101a, and its own central axis is the first central axis. Illustratively, the first inlet aperture 114a is located between the first cartridge 116a and a sidewall of the first cylinder 101 a.

The second air filtering unit 100b communicates as a rear stage of the first air filtering unit 100 a. The second air filtering unit 100b may have a similar structure to the first air filtering unit 100a, but the second air filtering unit 100b does not have to be provided with the first air intake through hole 114a and the second air intake through hole 115a.

Specifically, the second air filtering unit includes a second cylinder 101b. The second cylinder 101b includes: opposite second closed end 111b and second venting end 113b, and second receiving space 112b between second closed end 111b and second venting end 113b. As an example, the second closed end 111b of the second cylinder 101b is closed by a second end cap 102 b. The side wall of the second cylinder 101b is provided with an air inlet communicated with the first air outlet 1131 a. The second exhaust port 113b is provided with a second exhaust port 1131b for communicating with the engine. As illustrated in fig. 3, a second filter element 116b may be disposed in the accommodating space 112b, and two ends of the second filter element are respectively abutted against the second closed end 111b and the second ventilation end 113b. Illustratively, the second filter element 116b is disposed coaxially with the second cylinder 101b. The second air outlet 1131b is located within the ring of the second filter element, i.e., within the filtered region.

Illustratively, the first air filtering unit 100a and the second air filtering unit 100b may have the same size structure, and the second filter element 116b and the first filter element 116a may be the same, and may serve as a backup for the first filter element 116a to enhance the reliability of the air filtering device.

As indicated by the arrows in fig. 3, the air flow entering the first cylinder 101a passes through the first filter element 116a, then flows downward from the first air outlet 1131a into the air inlet 110b of the second cylinder 101b, passes through the second filter element 116b, and then flows out of the second cylinder 101b from the second air outlet 1131 b. The air enters the engine after two-stage filtration, and clean air can be provided.

It should be noted that, although the two-stage air filtering units 100a and 100b are provided in the present embodiment, the second air filtering unit 100b is not necessarily required, and may be selected according to the requirements, and is not limited to the illustration.

In an alternative example, as shown in fig. 2, the air inlet 110b and the first air outlet 1131a are communicated through a straight line, and a sleeve assembly 108 is illustrated, where the sleeve assembly 108 extends along a straight line. The first central axis Y of the air inlet 110b, which coincides with the first air outlet 1131a, intersects the center O of the second cylinder (i.e., two central axes intersect), so that the first air filtering unit 100a and the second air filtering unit 100b are centrally communicated in the radial direction of the second air filtering unit 100 b. As illustrated in fig. 2, the first air filtering unit 100a may be vertically disposed, and a central axis thereof may be collinear with a central axis of the first air outlet 1131 a. The second air filtering unit 100b may be horizontally disposed, and a central axis of the second air filtering unit 100b is perpendicular to and intersects with a central axis of the first air outlet 1131a, and the central axis of the first air outlet 1131a passes through a center of the second air filtering unit 100 b. Under this structure, the air outlet of the first air outlet 1131a enters the second cylinder 101b centrally in the radial direction of the second cylinder 101b, compared with the eccentric communication mode in which the first air outlet 1131a deviates from the central axis of the second cylinder 101b, no rotational flow is generated, the energy loss of the air flow is avoided, and the full-scale air inlet flow is ensured.

The air tank 103 is communicated with the first accommodating space 112a through the first air outlet 1131 a. Wherein, the air pressure in the air storage tank 103 is higher than the air pressure in the first accommodating space 112a. In some embodiments, the gas reservoir 103 stores gas at a pressure of 8kg to 10 kg.

The release valve 104 is configured to be set in a valve state to open/close a pipeline from the air tank 103 to the first air outlet 1131a, so as to release the dust removing air flow from the air tank 103 to the first filter element 116a through the first air outlet 1131a when the pipeline is conducted. As an example, the relief valve 104 may be a pulsed solenoid valve.

Referring also to fig. 5, fig. 5 shows a schematic block diagram of an electronic control system of an air filtering device according to an embodiment of the disclosure. The controller 105 is communicatively connected to and sets the valve state of the release valve 104. As an example, the controller 105 may trigger each time the release valve 104 opens the line by a pulse signal. In some embodiments, the controller 105 may be implemented based on MCU, soC, CPU, FPGA, or the like.

In particular, as shown in fig. 2, a self-cleaning function of the first air filter unit 100a is shown. When self-cleaning is required, the controller 105 sends a pulse signal to the release valve 104, the valve state of the release valve 104 is set to conduct the pipeline from the air tank 103 to the first air outlet 1131a, and the high-pressure air in the air tank 103 is flushed into the first cylinder 101a from the first air outlet 1131a to reach the filtered area 1122a as a dust-removing air flow. Since the outside air enters from the first air intake through hole 114a and the second air intake through hole 115a and passes through the first filter element 116a from the pre-filter region 1121a to the post-filter region 1122a, dust is filtered and left on the surface of the first filter element 116a at the pre-filter region 1121a as indicated by the illustrated arrows. The dust-removing air flow drops dust adhering to the first filter element 116a, and is discharged from the first and second air intake through holes 114a and 115a near the lower end. Thereby, self-cleaning of the first air filter unit 100a is achieved.

Because the ash deposition degree of the filter element can influence the airflow rate passing through the filter element, the more ash deposition is, the smaller the airflow rate passing through the filter element is. Thus, as an example, a first flow sensor 107 may be provided in communication with the controller 105, as shown with reference to fig. 5. When the airflow rate is detected to be lower than a preset threshold value, the controller 105 may output the pulse signal to execute the self-cleaning action when the first filter element 116a is ash accumulation to reach a certain condition requiring to start the self-cleaning action. In some embodiments, the first air outlet 1131a may be connected to a transfer pipe, two ends of the transfer pipe are respectively connected to the first accommodating space 112a in the first cylinder 101a and the next-stage device (such as the second cylinder 101b, or directly connected to an engine in other embodiments), the air tank 103 may be connected to a side wall of the transfer pipe in a pipeline, and the first flow sensor 107 may be disposed in the transfer pipe.

In the embodiment of fig. 2, the adapter tube may be implemented as a sleeve assembly 108 disposed at the first air outlet 1131a. Alternatively, the sleeve assembly 108 may be in airtight contact with the first air outlet 1131a. The sleeve assembly 108 includes an inner pipe 181 and an outer pipe 182, the inner pipe 181 is communicated with the first air outlet 1131a, and is provided with a through opening for outputting the filtered air flow, i.e. an opening at the lower end in the figure, and can be communicated with the air inlet 110b of the second cylinder 101 b. For example, the first flow sensor 107 may be provided in the inner tube 181. The outer tube 182 is sleeved outside the inner tube 181, and one end of the outer tube, which is far away from the first cylinder 101a, is connected with the inner tube 181 in an airtight manner; the outer tube 182 and the inner tube 181 are spaced apart to form an air flow channel 183 having air nozzles 1831 communicating with the first accommodation space 112a, and the air nozzles 1831 are spaced apart from the inner tube 181 by the other end of the outer tube 182. The air flow channel 183 provides a flow of dedusting air to the first filter cartridge 116a in the first cylinder 101 a. As an example, the outer tube 182 may be vented to communicate with the air reservoir 103. The edge of the inner tube 181, which is close to one end (i.e., the upper end in the drawing) in the first cylinder 101a, is inclined outwards, so as to guide the dust-removing air flow sprayed out by the air nozzle 1831 to impact the inner side surface of the first filter element 116a outwards, so as to realize the structure of an annular horn air nozzle, and facilitate the improvement of the cleaning effect on the first filter element 116 a.

Further, as shown in fig. 1 and 2, the air tank 103 may be disposed upright, for example. The release valve 104 may be located at an upper end of the air tank 103, and a drain valve 133 is disposed at a bottom of the air tank 103. The advantage of the release valve 104 being provided 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 dedusting air flow, the gas needs to be sprayed to avoid the liquid from being sprayed to the first filter element 116a (typically, paper which cannot be washed with water) to cause damage. Therefore, the release valve 104 releases the gas at the upper end of the gas tank 103, and releases the liquid at the bottom through the drain valve 133, so that the liquid level of the liquid can be effectively controlled to be at a lower position, and the liquid can not enter the first gas outlet 1131a together with the gas.

As an example, for example, as shown in fig. 1, on some construction equipment, such as off-highway mining trucks, with a main gas tank 200, the gas tank 103 may be supplied with gas via the main gas tank. Specifically, the air tank 103 may be connected to the main air tank 200 through a pipeline provided with a regulating valve 201, and the air tank 103 may be provided with a first pressure sensor 134 for detecting a first pressure signal of air pressure of the air tank 103. Referring to fig. 5, the controller 105 is communicatively connected to the first pressure sensor 134 and the regulating valve 201, and is configured to receive the first pressure signal, so as to set the opening of the regulating valve 201 according to the first pressure signal, for example, by adjusting the opening of the regulating valve 201, so as to adjust the pressure of the high-pressure gas output from the main gas tank 200 to the gas tank 103. For example, if the air pressure in the air tank 103 is higher than a certain preset threshold, the opening of the regulating valve 201 may be correspondingly increased to reduce the air pressure of the pipeline; conversely, if the air pressure in the air tank 103 is too low, the opening degree of the regulator 201 may be reduced to raise the air pressure.

It can be appreciated that, in the case that the release valve 104 used in the air tank 103 is a solenoid valve having only an on/off state, the adjusting valve 301 needs to set a proper pipeline pressure to avoid the problem of too high or too low air pressure in the air tank 103, and the too high air pressure may eject the dust removing air flow exceeding the bearing air pressure of the first filter element 116a, which may damage the first filter element 116a, thereby shortening the service life.

In some embodiments, other air supplementing facilities may be provided in addition to the main air tank 300 and the regulating valve 301, which are an air supplementing mode for the air tank 103. As shown in fig. 1, the bottom of the air tank 103 may be connected to an air pump 300, and the air pump 300 is used for pumping air from bottom to top to the air tank 103, and the release valve 104 as described in the previous embodiment is used for deflating the air tank 103 at the upper end, and controlling the liquid level in the air tank 103 in cooperation with the drain valve 133, so that the liquid is not pumped into the first air outlet 1131a under the action of the air pump. The pump 300 of fig. 1 is illustratively covered in a protective cover.

In addition, the air tank 103 is provided with a pressure switch 132 triggered by the air tank 103 reaching a preset air pressure. Referring also to fig. 5, the pressure switch 132 may be communicatively coupled to the pump 300. Illustratively, the pump 300 may generate a switching signal when the pressure switch 132 reaches a lower threshold or an upper threshold, respectively, and transmit the switching signal to the pump 300 to actuate the pump 300. For example, when the air pressure of the air 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 air tank 103. When the air pressure of the air storage tank 103 reaches the upper limit threshold value, 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 and upper threshold values may be, for example, 8kg to 10kg of pressure in the previous embodiment. In this example, the pressure switch 132 and the pump 300 may be connected to each other to form a control loop, and the pump 300 may be triggered to perform two states, i.e., start or stop, without the participation of the controller 105.

In still other embodiments, the controller 105 is communicatively connected to the first pressure sensor 134, the pressure switch 132 and the air pump 300, and is configured to control the opening of the adjusting valve 201 and the operation of the air pump 300 independently or cooperatively according to the pressure signal of the first flow sensor 107 and/or the switch signal of the pressure switch, so that the air pressure of the air tank 103 is within the preset air pressure range.

As an example, the controller 105 may independently or cooperatively control the opening of the adjusting valve 201 and the operation mode of the air pump 300, and may include at least one of the following.

In one example, reference may be made to fig. 6, which shows a schematic flow diagram of one manner of air make-up control of the controller of the embodiment of fig. 5.

In fig. 6, the flow includes:

step S601: and responding to the fact that the current gas pressure represented by the first pressure signal is lower than a preset gas pressure lower limit threshold value, and the controller obtains a comparison result of a pressure difference value of the current gas pressure, which is away from the preset gas pressure lower limit threshold value, and a preset pressure difference threshold value.

Step S602: when the comparison result shows that the pressure difference value of the preset lower limit threshold is higher than the preset pressure difference threshold, firstly setting the opening of the regulating valve to enable the air pressure of the air storage tank to rise to an intermediate air pressure value close to the preset lower limit threshold, and then rising the air pressure of the air storage tank to be within the preset air pressure range through the operation of the inflating pump.

In this example, that is, when the controller 105 detects that the current pressure of the air tank 103 is insufficient and the distance from the preset lower limit threshold is also larger through the first pressure sensor 134, the opening of the adjusting valve can be controlled to preferentially and rapidly supplement air from the main air tank 200, but the main air tank 200 belongs to engineering equipment and is used by the engineering equipment, so that there is a risk of insufficient air pressure, which may cause that sufficient air cannot be supplemented to the air tank 103. Therefore, the air tank 103 can be inflated to an intermediate air pressure value by the main air tank 200, and the air tank 103 can be inflated to a preset air pressure range by the inflation pump 300 through experience setting, measurement setting and the like, so that the air-inflating efficiency and risk avoidance are both considered.

In some embodiments, for the controller 105, the pressure switch 132 and the first flow sensor 107 are primary and standby, and the inflation pump 300, the primary gas tank 200 and the regulating valve 201 are primary and standby facilities for supplementing the gas tank 103. Specifically, since the pressure switch 132 and the second flow sensor 109 are both configured to detect the pressure of the air tank 103, they can be mutually active, i.e., when one of them fails, the controller 105 can obtain a pressure signal through the other. The air pump 300, the main air tank 200 and the regulating valve 201 are the main and standby facilities for air supply to the air tank 103, when one of the main and standby facilities fails, for example, the regulating valve 201 cannot be opened after being closed or the air pump 300 is damaged, and the controller 105 can control the other air supply facility to supply air to the air tank 103.

In yet another example, the controller 105 adjusts the air pressure of the air tank 103 based on the switch signal in preference to adjusting the air pressure of the air tank 103 based on the pressure signal. Specifically, the pressure switch 132 may be mutually primary with the first pressure sensor 134, but the pressure switch 132 takes precedence over the first pressure sensor 134. Since the pressure switch 132 itself has the function of judging whether the air pressure of the air tank 103 is outside the preset air pressure range and outputting two switch signals (lower than the preset lower limit threshold or higher than the preset upper limit threshold), the two switch signals can be used as the bottom-keeping reminder for air supply for the controller 105, and the interactive data volume is smaller. In some mode of operation, such as a low load mode of operation, the controller 105 may also control the air pressure of the air reservoir 103 in response to only the switch signal of the pressure switch 132, but not in response to the first pressure signal of the first pressure sensor 134.

In one example, the controller 105 stops the inflation pump 300 and closes the regulator valve 201 in response to the current gas pressure represented by the first pressure signal being above a preset upper gas pressure threshold. Specifically, when the air pressure is found to be too high, the controller 105 may stop the air-supplementing operation of each air-supplementing facility.

As shown in fig. 7, a schematic circuit diagram of a circuit control system according to another embodiment of the present disclosure is shown.

In fig. 7, the circuit control system may include a second flow sensor 109 disposed in communication with the second air outlet and in communication with the controller 105 for detecting the flow of air exiting the second air filter unit 100b and outputting a second flow signal; the controller 105 is further configured to control the release valve 104 to be turned on in response to the first flow signal being lower than a first preset airflow flow threshold and/or the airflow flow corresponding to the second flow signal being lower than a second preset airflow flow threshold, so as to form the dust removing airflow. For example, when the first flow sensor 107 fails, the second flow sensor 109 may act as a backup for the first flow sensor 107. For another example, by performing the comprehensive judgment using the two flow rate signals (e.g., both flow rate signals indicate that the airflow rate is too low), a more accurate judgment result of the turbidity of the first filter element 116a can be obtained, and erroneous judgment can be avoided.

As shown in fig. 8, a schematic circuit diagram of a circuit control system according to another embodiment of the present disclosure is shown.

In fig. 8, the circuit control system further includes a second pressure sensor 135 and an on-off actuator 136. The second pressure sensor 135 is disposed to communicate with the air inlet, and is configured to detect an intake pressure of the second air filtering unit 100b and output a second pressure signal. The opening and closing actuator 136 is controllably operable to open and close the air inlet 110b. The controller 105 is communicatively connected to the second pressure sensor 135 and the on-off actuator 136, and is configured to control the actuator 136 to close the air inlet 110b in response to the pressure indicated by the second pressure signal being higher than a preset pressure threshold. For example, the on-off actuator 136 may be implemented as a motor-driven door opening and closing mechanism.

The solution in the embodiment of fig. 8 can be to close the air inlet 110b in time when the air flow of the excessive pressure arrives, so as to protect the second filter element 116b in the second air filtering unit 100b from being damaged by the air flow of the excessive pressure. The air flow of the excessive air pressure may be from the outside of the air filtration backflushing device, or may be from the short-time impact air flow from the main air tank 200, the air tank 103, the first accommodation space 112a, the inner pipe 181 to the intake port 110b after the release valve 201 fails.

It should be noted that, the arrangements of the electronic control systems in fig. 4 to 7 may be arranged and combined, for example, the second flow sensor 109 in fig. 7, the second pressure sensor 135 and the on-off actuator 136 in fig. 8, and the like are not limited to the illustration. The blocks of circuit components in the illustrations are optional in dashed line representation.

In summary, embodiments of the present disclosure provide a circuit control system for an air filtration backflushing device and an applied device, where the device includes: the air filter comprises a first air filtering unit, an air storage tank and a release valve; the ventilation end of the first cylinder body is provided with a first air outlet, and the air storage tank is communicated with the first accommodating space through the first air outlet; a release valve for being set with a valve state to open/close a pipeline from the air tank to the first air outlet; the circuit control system includes: the air conditioner comprises a first flow sensor, a first pressure sensor, a regulating valve and a controller, wherein the first flow sensor is communicated with the first air outlet, the first pressure sensor is arranged on the air storage tank, the regulating valve is arranged between the air storage tank and a main air pipe, and the controller is in communication connection with the regulating valve. Therefore, the controller can detect filter element dirty by utilizing the first flow sensor to start self-cleaning, and control the gas pressure of the gas storage tank to be in a range according to the feedback of the first pressure sensor, so that good protection effect on the filter element is considered, the service life of the filter element is prolonged, and the product competitiveness is improved.

The above embodiments are merely illustrative of the principles of the present disclosure and its efficacy, and are not intended to limit the disclosure. Modifications and variations may be made to the above-described embodiments by those of ordinary skill in the art without departing from the spirit and scope of the present disclosure. Accordingly, it is intended that all equivalent modifications and variations which a person having ordinary skill in the art would accomplish without departing from the spirit and technical spirit of the present disclosure be covered by the claims of the present disclosure.

Claims

1. A circuit control system for an air filtration backflushing device, wherein the air filtration backflushing device supplies air filtration for an engine of an engineering plant; the air filtration backflushing device comprises: the air filter comprises a first air filtering unit, an air storage tank and a release valve;

a first air filter unit including a first cylinder; the first cylinder includes: a first closed end and a first vented end opposite each other, and a first receiving space between the first closed end and the first vented end; an annular first filter element with two ends respectively abutting against the first closed end and the first ventilation end is arranged in the first cylinder; the ventilation end of the first barrel is provided with a first air outlet which is positioned in the ring of the first filter element;

The air storage tank is communicated with 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;

the release valve is used for being set in a valve state to open/close a pipeline from the air storage tank to the first air outlet so as to release dust removal air flow from the air storage tank to the first filter element through the first air outlet when the pipeline is conducted;

the circuit control system includes:

the first flow sensor is communicated with the first air outlet and is used for detecting the air flow of the first air outlet and outputting a first flow signal; the air storage tank is communicated with the main air tank of the engineering equipment through a pipeline provided with an adjusting valve so as to obtain air supplement;

the first pressure sensor is arranged in the gas storage tank and is used for detecting the gas pressure of the gas storage tank and outputting a pressure signal;

the controller is in communication connection with the first flow sensor and the release valve and is used for controlling the release valve to be conducted so as to form the dust removal airflow in response to the fact that the gas flow corresponding to the flow signal is lower than a first preset flow threshold value; the controller is also in communication connection with the first pressure sensor and the regulating valve, and is used for setting the opening of the regulating valve according to the pressure signal of the first pressure sensor so as to regulate the gas pressure output by the main gas tank to the gas storage tank, so that the gas pressure of the gas storage tank is in a preset gas pressure range.

2. The circuit control system of claim 1, wherein the air reservoir line communicates with an inflation pump; the circuit control system includes:

the pressure switch is arranged on the air storage tank and used for detecting the air pressure of the air storage tank, and generating different switch signals when the air pressure of the air storage tank is out of a preset air pressure range so as to trigger the operation or stop of the air pump, and the air pump is used for supplementing air to the air storage tank when in operation.

3. The circuit control system of claim 1, wherein the air reservoir line communicates with an inflation pump; the controller is in communication connection with the first pressure sensor, the pressure switch and the inflating pump, and is used for independently or cooperatively controlling the opening of the regulating valve and the operation of the inflating pump according to the pressure signal of the first flow sensor and/or the switch signal of the pressure switch so as to enable the gas pressure of the gas storage tank to be in a preset gas pressure range.

4. The circuit control system according to claim 3, wherein the operation of the regulating valve opening and the pump is controlled independently or cooperatively according to the pressure signal of the first flow sensor and/or the switching signal of the pressure switch so as to make the gas pressure of the gas tank within a preset gas pressure range, comprising at least one of the following:

1) Responding to the fact that the current gas pressure represented by the first pressure signal is lower than a preset gas pressure lower limit threshold value, and the controller obtains a comparison result of a pressure difference value of the current gas pressure, which is away from the preset gas pressure lower limit threshold value, and a preset pressure difference threshold value;

when the comparison result shows that the pressure difference value of the preset lower limit threshold is higher than the preset pressure difference threshold, firstly setting the opening of the regulating valve to enable the air pressure of the air storage tank to rise to an intermediate air pressure value close to the preset lower limit threshold, and then rising the air pressure of the air storage tank to be within the preset air pressure range through the operation of the inflating pump;

2) The controller adjusts the air pressure of the air storage tank based on the switch signal in preference to adjusting the air pressure of the air storage tank based on the pressure signal;

3) Responsive to the current gas pressure represented by the first pressure signal being above a preset upper gas pressure threshold, the controller stopping the inflation pump and closing the regulator valve;

4) For the controller, the pressure switch and the first flow sensor are primary and standby, and the inflating pump, the primary air tank and the regulating valve are primary and standby facilities for inflating the air storage tank.

5. The circuit control system of claim 1, wherein the air filtration backflushing device comprises: a second air filter unit including a second cylinder; the second cylinder includes: a second closed end and a second venting end opposite, and a second receiving space between the second closed end and the second venting end; the side wall of the second cylinder body is provided with an air inlet communicated with the first accommodating space through the first air outlet; an annular second filter element with two ends respectively abutting against the second closed end and the second ventilation end is arranged in the second accommodating space; the ventilation end of the second cylinder body is provided with a second air outlet for communicating with the engine; the second air outlet is located within the ring of the second filter element.

6. The circuit control system of claim 5, comprising: the second flow sensor is communicated with the second air outlet and is in communication connection with the controller, and is used for detecting the airflow flow of the air discharged by the second air filtering unit and outputting a second flow signal; the controller is further configured to control the release valve to be turned on in response to the first flow signal being lower than a first preset airflow flow threshold and/or the airflow flow corresponding to the second flow signal being lower than a second preset airflow flow threshold, so as to form the dust removal airflow.

7. The circuit control system of claim 5, comprising: the second pressure sensor is communicated with the air inlet and is connected with the controller in a communication manner and is used for detecting the air inlet pressure of the second air filtering unit and outputting a second pressure signal; the controller is further configured to independently or cooperatively control the opening of the adjusting valve and the operation of the air pump in order to make the air pressure of the air storage tank be within a preset air pressure range, in response to the first flow signal being lower than a first preset air flow threshold and/or the air flow corresponding to the second flow signal being lower than a second preset air flow threshold.

8. An air filtration backflushing device characterized by air filtration supplied to an engine for engineering equipment; the air filtration backflushing device comprises: the device comprises a first air filtering unit, a second air filtering unit, an air storage tank and a release valve;

a second air filter unit including a second cylinder; the second cylinder includes: a second closed end and a second venting end opposite, and a second receiving space between the second closed end and the second venting end; the side wall of the second cylinder body is provided with an air inlet communicated with the first accommodating space through a straight line through the first air outlet; an annular second filter element with two ends respectively abutting against the second closed end and the second ventilation end is arranged in the second accommodating space; the ventilation end of the second cylinder body is provided with a second air outlet for communicating with the engine; the second air outlet is positioned in the ring of the second filter element; the method comprises the steps of,

The circuit control system of any one of claims 1 to 7.

9. The air filtration backflushing apparatus of claim 8, wherein said first air outlet is provided with a sleeve assembly; the sleeve assembly includes:

the inner pipe is communicated with the first air outlet and the air inlet and is provided with a through port for outputting the filtered air flow;

the outer tube is sleeved outside the inner tube, and one end of the outer tube, which is far away from the first cylinder, is connected with the inner tube in an airtight manner; the outer pipe is communicated with a pipeline for conveying dust removal air flow of the first filter element in the first cylinder body so as to enable the dust removal air flow to flow into the air flow channel.

10. The air filtration backflushing apparatus of claim 9, wherein an edge of the inner tube near an end within the first cartridge body is inclined toward the first filter element to direct the air jet toward the first filter element.