Filter module and valve element assembly of liquid inlet control valve

Abstract

The utility model provides a valve element assembly of a filter module and a liquid inlet control valve, and relates to the technical field of underground coal mine filter stations, the valve element assembly comprises a valve body, at least two filter elements, a pilot control valve, a liquid inlet control valve and a pollution discharge control valve, the pilot control valve is installed outside the valve body and connected with the liquid inlet control valve and the pollution discharge control valve, and the filter elements are connected with the liquid inlet control valve and the pollution discharge control valve. On-off control pressure is provided for the liquid inlet control valve and the pollution discharge control valve through the same pilot liquid of the pilot control valve, the on-off control pressure of the liquid inlet control valve is smaller than that of the pollution discharge control valve, and the liquid inlet control valve and the pollution discharge control valve are detachably installed in the valve body and correspond to the same filter element in a one-to-one mode. The liquid inlet control valve and the pollution discharge control valve are integrated in the valve body provided with the filter element, the whole structure of the filtering module is compact, the use requirements of different underground space sizes are met, closing of the liquid inlet control valve is prior to opening of the pollution discharge control valve, and the problem of energy waste caused by discharging of emulsified liquid through the pollution discharge control valve can be effectively avoided.

Description

Technical Field

[0001] The present application relates to the technical field of underground filter stations in coal mines, and in particular to a filter module and a valve core assembly of a liquid inlet control valve. Background Art

[0002] The backwash filter station is a filtering device used in the liquid supply system of underground comprehensive mining equipment such as coal mines. The filter module serves as the basis of the backwash filter station. It is mainly composed of a valve body, a pilot control valve and two filters installed on the valve body, and two liquid inlet stop valves and two backwash check valves in the valve body. When filtering the emulsion, the emulsion medium flows from the liquid inlet through the two liquid inlet stop valves into the corresponding filters for filtration, and the filtered emulsion medium converges and flows out in the liquid outlet channel. During backwashing, the pilot control valve closes an inlet stop valve, and the filter corresponding to the closed inlet stop valve loses the high-pressure emulsion medium flowing in, and its inner cavity pressure is reduced, so that the emulsion medium in the liquid outlet channel that has been filtered by another filter flows back into the inner cavity of the filter. The reversely flowing emulsion medium washes the filter element in the filter, and carries impurities and is discharged from the corresponding backwash check valve opened by the pilot control valve. When one filter is backwashed, the process is the same when backwashing another filter.

[0003] However, in the related art, the filter module often adopts a layout structure in which the liquid inlet stop valve, the backwash check valve and the valve body for installing the filter element are separated and connected in parallel, which makes the overall volume of the filter module larger and the integration is not high, and it is difficult to meet the use requirements when it is limited by different space sizes underground. At the same time, since the closing of the liquid inlet stop valve and the opening of the backwash check valve are controlled by the same pilot control fluid of the pilot control valve, and the control pressure required by the backwash check valve is smaller than that of the liquid inlet stop valve, at the moment when the pilot control valve outputs the pilot control fluid, the backwash check valve is opened first and the liquid inlet stop valve is closed later, so that part of the emulsion is discharged from the backwash check valve, resulting in waste of emulsion. Utility Model Content

[0004] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of one aspect of the utility model proposes a filter module, which integrates the liquid inlet control valve and the sewage control valve into the interior of the valve body where the filter element is installed, so that the overall structure of the filter module is compact and the volume is reduced to meet the use requirements of different space sizes underground. At the same time, the closing of the liquid inlet control valve precedes the opening of the sewage control valve, which can effectively avoid the energy waste caused by the discharge of the emulsion from the sewage control valve.

[0006] Another aspect of the present invention provides a valve core assembly of a liquid inlet control valve.

[0007] A filter module according to an embodiment of the utility model includes a valve body and at least two filter elements, as well as a pilot control valve, a liquid inlet control valve and a sewage discharge control valve.

[0008] Wherein, the valve body is provided with a liquid inlet, a liquid outlet and a sewage outlet, and all the filter elements are installed outside the valve body and arranged at intervals along the first direction;

[0009] Wherein, the pilot control valve is installed on the outside of the valve body and is connected to the liquid inlet control valve and the sewage control valve, the liquid inlet control valve and the sewage control valve are provided with on-off control pressure by the same pilot liquid of the pilot control valve, the on-off control pressure of the liquid inlet control valve is less than the on-off control pressure of the sewage control valve, the liquid inlet control valve and the sewage control valve are both detachably installed inside the valve body and correspond one-to-one to the same filter element, the liquid inlet, the liquid inlet control valve, the corresponding filter element and the liquid outlet are connected in sequence, the corresponding filter element, the sewage control valve and the sewage outlet are connected in sequence, wherein the liquid inlet control valve and the sewage control valve are both connected to the liquid inlet end of the corresponding filter element.

[0010] According to the filter module of the embodiment of the utility model, the control pressure of the liquid inlet control valve and the sewage control valve is provided by the same pilot liquid of the pilot control valve, and the control pressure required for closing the liquid inlet control valve is less than the control pressure required for opening the sewage control valve, so that when the filter module is switched to the backwash mode, the closing of the liquid inlet control valve can precede the opening of the sewage control valve. Therefore, compared with the filter module in the related art in which the backwash check valve is opened first and the liquid inlet stop valve is closed later, the filter module in the present application can effectively avoid the emulsion flowing in through the liquid inlet control valve from being directly discharged by the sewage control valve, causing the waste of emulsion. At the same time, the liquid inlet control valve and the sewage control valve are detachably installed inside the valve body. Compared with the layout structure of the liquid inlet stop valve, the backwash check valve and the valve body with the filter element installed in the related art, the overall volume of the filter module in the present application is reduced, the integration is high, it can meet the use requirements of different space sizes underground, and the structure is compact.

[0011] In some embodiments, the liquid inlet control valve and the sewage discharge control valve both include a valve core assembly, a mounting hole is provided inside the valve body, and the valve core assembly fits in the mounting hole.

[0012] In some embodiments, the filter module further includes a liquid distribution plate, which is mounted outside the valve body and located above the liquid inlet control valve, and the liquid distribution plate is connected to the pilot control valve, the liquid inlet control valve and the sewage control valve.

[0013] In some embodiments, two liquid supply and confluence channels, both extending in a first direction and having equal inner diameters, are provided inside the valve body. The two liquid supply and confluence channels are spaced apart in a second direction on the same horizontal plane, and the second direction is perpendicular to the first direction. Both ends of one of the liquid supply and confluence channels are coaxially provided with a connected liquid inlet, and both ends of the other liquid supply and confluence channel are coaxially provided with a connected liquid outlet.

[0014] In some embodiments, at least two of the filter elements are arranged at intervals on the valve body along the first direction, the liquid outlet ends of the filter elements are connected to the same liquid supply and collection channel formed with a liquid outlet, and the liquid inlet control valves connected to the liquid inlet end of each filter element are connected to the liquid supply and collection channel formed with a liquid inlet.

[0015] In some embodiments, the liquid inlet control valve and the sewage discharge control valve are arranged adjacent to each other along the first direction and are located above the liquid supply and confluence channel formed with a liquid inlet.

[0016] A valve core assembly of a liquid inlet control valve according to an embodiment of the utility model includes a valve sleeve and a valve core.

[0017] Wherein, the valve sleeve has a control cavity extending along a third direction and is provided with a liquid inlet, a working port and a control port communicating with the control cavity, the working port is located between the liquid inlet and the control port in the third direction, the liquid inlet is communicated with the liquid inlet, the working port is communicated with the filter element, and the control port is communicated with the pilot control valve;

[0018] Wherein, the valve core is fitted in the control chamber and has a filtering position for opening the working port and a recoil position for blocking the working port.

[0019] The technical advantages of the valve core assembly of the liquid inlet control valve according to the embodiment of the utility model are the same as the technical advantages of the above-mentioned filter module, which will not be repeated here.

[0020] In some embodiments, the valve core has a first sealing surface and a second sealing surface, the first sealing surface seals the control port in the filtering position, the second sealing surface seals the liquid inlet in the backflushing position, and the area of ​​the first sealing surface is greater than that of the second sealing surface.

[0021] In some embodiments, the valve sleeve comprises a screw plug, a guide sleeve and a lower valve sleeve which are sequentially connected along a third direction, and the inner cavity of the screw plug, the inner cavity of the guide sleeve and the inner cavity of the lower valve sleeve are sequentially connected and together constitute the control cavity;

[0022] The control port is provided at the end of the screw plug away from the guide sleeve, and a drain port is provided through the circumference of the screw plug;

[0023] The end of the lower valve sleeve facing away from the guide sleeve is provided with the liquid inlet, and the peripheral surface of the lower valve sleeve is provided with the working port.

[0024] In some embodiments, the guide sleeve and the screw plug are connected by a retaining ring, and the retaining ring is a flexible open metal ring.

[0025] In some embodiments, the valve core includes a first section and a second section connected in sequence, the first section is engaged in the inner cavity of the screw plug, the end of the first section facing away from the second section is provided with the first sealing surface, the second section is engaged in the inner cavity of the guide sleeve and the inner cavity of the lower valve sleeve in sequence along the third direction, and the end of the second section facing away from the first section is provided with the second sealing surface.

[0026] In some embodiments, at least one wear-resistant ring is provided between the inner circumference of the guide sleeve and the outer circumference of the second section.

[0027] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic structural diagram of a filter module according to an embodiment of the utility model (the valve body, the pilot control valve and the liquid distribution plate are partially cut away in the figure).

[0029] Figure 2 It is a structural schematic diagram of a valve core assembly of a liquid inlet control valve according to an embodiment of the utility model.

[0030] Figure numerals: 1, valve body, 11, liquid inlet, 12, liquid outlet, 13, drain outlet, 14, mounting hole, 15, liquid supply and collection channel, 2, filter element, 3, pilot control valve, 4, liquid inlet control valve, 41, valve core assembly, 411, valve sleeve, 4111, screw plug, 4112, guide sleeve, 4113, lower valve sleeve, 4114, drain port, 4115, retaining ring, 412, liquid inlet, 413, working port, 414, control port, 415, valve core, 4151, first sealing surface, 4152, second sealing surface, 4153, first section, 4154, second section, 416, wear-resistant ring, 5, drain control valve, 6, liquid distribution plate. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0032] like Figure 1As shown, a filter module according to an embodiment of the utility model includes a valve body 1 and at least two filter elements 2, as well as a pilot control valve 3, a liquid inlet control valve 4 and a sewage discharge control valve 5.

[0033] The valve body 1 is provided with a liquid inlet 11, a liquid outlet 12 and a sewage outlet 13, and all the filter elements 2 are installed outside the valve body 1 and arranged at intervals along the first direction.

[0034] Among them, the pilot control valve 3 is installed on the outside of the valve body 1 and is connected to the liquid inlet control valve 4 and the sewage control valve 5. The liquid inlet control valve 4 and the sewage control valve 5 are provided with on-off control pressure by the same pilot liquid of the pilot control valve 3. The on-off control pressure of the liquid inlet control valve 4 is less than the on-off control pressure of the sewage control valve 5. The liquid inlet control valve 4 and the sewage control valve 5 can be detachably installed inside the valve body 1 and correspond one-to-one to the same filter element 2. The liquid inlet 11, the liquid inlet control valve 4, the corresponding filter element 2 and the liquid outlet 12 are connected in sequence, and the corresponding filter element 2, the sewage control valve 5 and the sewage outlet 13 are connected in sequence, wherein the liquid inlet control valve 4 and the sewage control valve 5 are both connected to the liquid inlet end of the corresponding filter element 2.

[0035] According to the filter module of the embodiment of the utility model, the control pressure of the liquid inlet control valve 4 and the sewage control valve 5 is provided by the same pilot liquid of the pilot control valve 3, and the control pressure required to close the liquid inlet control valve 4 is less than the control pressure required to open the sewage control valve 5, so that when the filter module is switched to the backwash mode, the closing of the liquid inlet control valve 4 can precede the opening of the sewage control valve 5. Therefore, compared with the filter module in the related art in which the backwash check valve is opened first and the liquid inlet stop valve is closed later, the filter module in the present application can effectively avoid the emulsion flowing in through the liquid inlet control valve 4 being directly discharged by the sewage control valve 5, causing the waste of emulsion. At the same time, the liquid inlet control valve 4 and the sewage control valve 5 are detachably installed in the valve body 1. Compared with the layout structure of the liquid inlet stop valve, the backwash check valve and the valve body 1 with the filter element 2 installed in the related art, the overall volume of the filter module in the present application is reduced, the integration is high, it can meet the use requirements of different space sizes underground, and the structure is compact.

[0036] Specifically, the number of filter elements 2 can be 2, 4 or 6 and they can be arranged at equal intervals along the first direction. In order to further improve the degree of automation of the filter module, the pilot control valve 3 can be an electromagnetic pilot valve. The same pilot control valve 3 can simultaneously control the working conditions of two liquid inlet control valves 4 and two sewage control valves 5. The liquid inlet control valve 4 and the sewage control valve 5 can be installed inside the valve body 1 in a manner not limited to threaded connection. The sewage outlet 13 can lead the emulsion carrying pollutants after backwashing the filter element 2 to an external centralized sewage treatment device through a pipeline.

[0037] It should be noted that the specific structure and working principle of the sewage control valve 5 can adopt the existing technology in the field, and the on-off control pressure of the liquid inlet control valve 4 can be made smaller than the on-off control pressure of the sewage control valve 5 through corresponding structural design or selection, so that when the pilot liquid of the pilot control valve 3 controls the on-off of the two, the liquid inlet control valve 4 is closed first and the sewage control valve 5 is opened later, so it will not be expanded here.

[0038] like Figure 1 and Figure 2 As shown, in some embodiments, the liquid inlet control valve 4 and the sewage discharge control valve 5 both include a valve core assembly 41 , a mounting hole 14 is provided inside the valve body 1 , and the valve core assembly 41 fits in the mounting hole 14 .

[0039] The valve core assembly 41 of the liquid inlet control valve 4 and the sewage discharge control valve 5 is directly integrated into the valve body 1, eliminating the valve body 1 structure of the two, which can not only reduce the production cost to a certain extent, but also simplify the opening of the installation hole 14, so as to avoid the difficulty of processing the corresponding installation hole 14 designed inside the valve body 1 for installing the filter element 2 in order to match the valve body 1 structure of the two.

[0040] Specifically, in order to facilitate the disassembly and assembly operations between the valve core assembly 41 and the valve body 1 of the liquid inlet control valve 4 and the sewage discharge control valve 5, the mounting hole 14 extends from the top wall of the valve body 1 toward the inside of the valve body 1 along the height direction of the valve body 1, and at least a portion of the inner circumferential surface of the mounting hole 14 is provided with an internal thread, so that the disassembly and assembly direction of the valve core assembly 41 is above the valve body 1 and is threadedly connected, thereby effectively reducing the interference of space limitations on the disassembly and assembly of the valve core assembly 41.

[0041] like Figure 1 As shown, in some embodiments, the filter module also includes a liquid distribution plate 6, which is installed outside the valve body 1 and located above the liquid inlet control valve 4. The liquid distribution plate 6 is connected to the pilot control valve 3, the liquid inlet control valve 4 and the sewage control valve 5.

[0042] The liquid distribution plate 6 can lead the pilot liquid in the pilot control valve 3 to the liquid inlet control valve 4 and the sewage control valve 5 to realize the on-off control of the two by the pilot liquid. Among them, compared with the direct connection between the liquid outlet channel of the pilot control valve 3 and the liquid inlet channel of the liquid inlet control valve 4 and the sewage control valve 5, the flow channel connecting the two adjacent ones needs to be an inclined flow channel, which is difficult to process. In this application, the flow channel used for the circulation of the pilot liquid is integrated and transitioned into the liquid distribution plate 6, so that the flow channel connecting the pilot control valve 3 with the liquid inlet control valve 4 and the sewage control valve 5 can be designed as a structure in which a vertical straight flow channel and a horizontal flow channel cooperate with each other. The flow channel structure is more regular and the difficulty of flow channel processing is reduced.

[0043] In addition, the aperture of the liquid outlet channel of the pilot control valve 3 is generally small, and the flow channel of the liquid distribution plate 6 is used for liquid distribution. Under the premise of ensuring the on-off control pressure required by the liquid inlet control valve 4 and the sewage control valve 5, the flow channel aperture can be designed to be larger, so as to reduce the flow rate of the pilot liquid supplied by the pilot control valve 3 after passing through its liquid outlet channel, effectively avoiding impact damage to the valve core assembly 41 of the liquid inlet control valve 4 and the sewage control valve 5, and ensuring the service life of both.

[0044] like Figure 1 As shown, in some embodiments, two liquid supply and confluence channels 15 are provided inside the valve body 1, both extending along the first direction and having the same inner diameter. The two liquid supply and confluence channels 15 are arranged at intervals along the second direction on the same horizontal plane, and the second direction is perpendicular to the first direction. Both ends of one of the liquid supply and confluence channels 15 are coaxially provided with a connected liquid inlet 11, and both ends of the other liquid supply and confluence channel 15 are coaxially provided with a connected liquid outlet 12.

[0045] Two supply and confluence liquid channels 15 with the same structure are used, so that the two supply and confluence liquid channels 15 can be used according to the actual layout and installation of the filter module in the well. The emulsion is supplied through one of the two supply and confluence liquid channels 15, and the confluence liquid flows out from the other one. The two supply and confluence liquid channels 15 are highly replaceable.

[0046] Specifically, both ends of the two liquid supply and confluence channels 15 pass through the valve body 1. In order to ensure the use requirements of the filter module in the limited space underground, the two liquid supply and confluence channels 15 are designed to have the same structure to facilitate the nearby connection between the filter module and the emulsion source to be filtered and the liquid supply system of the underground comprehensive mining equipment, thereby improving the structural compactness and rationality of the filter module's underground layout.

[0047] It should be noted that when one of the liquid inlets 11 of the liquid supply and confluence channel 15 with liquid inlets 11 formed at both ends is used for emulsion inflow, the other liquid inlet 11 can be blocked with a plug. Similarly, when one of the liquid outlets 12 of the liquid supply and confluence channel 15 with liquid outlets 12 formed at both ends is used for emulsion outflow, the other liquid outlet 12 can be blocked with a plug.

[0048] like Figure 1 As shown, in some embodiments, at least two filter elements 2 are arranged at intervals along the first direction on the valve body 1, and the liquid outlet ends of the filter elements 2 are connected to the same liquid supply and collection channel 15 formed with a liquid outlet 12, and the liquid inlet control valves 4 connected to the liquid inlet end of each filter element 2 are connected to the liquid supply and collection channel 15 formed with a liquid inlet 11.

[0049] The structural design in which all filter elements 2 are connected to the same liquid supply and confluence channel 15, and all liquid inlet control valves 4 are connected to another liquid supply and confluence channel 15, enables the liquid outlet path and liquid supply path of the emulsion in the filter module to be integrated into two overall paths, thereby simplifying the flow channel layout inside the valve body 1.

[0050] like Figure 1 As shown, in some embodiments, the liquid inlet control valve 4 and the sewage discharge control valve 5 are arranged adjacent to each other along the first direction and are located above the liquid supply and confluence channel 15 formed with the liquid inlet 11.

[0051] The liquid inlet control valve 4 and the sewage discharge control valve 5 are arranged adjacent to each other along the first direction, which further improves the structural compactness and layout regularity of the filter module. At the same time, the liquid inlet control valve 4 and the sewage discharge control valve 5 are located above another liquid supply and collection channel 15, which simplifies and facilitates the connection between the liquid inlet control valve 4 and the liquid supply and collection channel 15.

[0052] like Figure 2 As shown, a valve core assembly of a liquid inlet control valve according to an embodiment of the utility model includes a valve sleeve 411 and a valve core 415 .

[0053] Among them, the valve sleeve 411 has a control cavity extending along the third direction and is provided with a liquid inlet 412, a working port 413 and a control port 414 connected to the control cavity. The working port 413 is located between the liquid inlet 412 and the control port 414 in the third direction. The liquid inlet 412 is connected to the liquid inlet 11, the working port 413 is connected to the filter element 2, and the control port 414 is connected to the pilot control valve 3.

[0054] The valve core 415 is fitted in the control chamber and has a filtering position for opening the working port 413 and a recoil position for blocking the working port 413 .

[0055] The technical advantages of the valve core assembly 41 of the liquid inlet control valve 4 according to the embodiment of the utility model are the same as the technical advantages of the above-mentioned filter module, which will not be repeated here.

[0056] Specifically, the third direction is the height direction of the valve body 1 .

[0057] like Figure 2 As shown, in some embodiments, the valve core 415 has a first sealing surface 4151 and a second sealing surface 4152. The first sealing surface 4151 seals the control port 414 in the filtering position, and the second sealing surface 4152 seals the liquid inlet 412 in the backflushing position. The area of ​​the first sealing surface 4151 is greater than the area of ​​the second sealing surface 4152.

[0058] The area of ​​the first sealing surface 4151 is designed to be larger than the area of ​​the second sealing surface 4152. According to the pressure calculation formula (pressure equals pressure divided by area), during backwashing, after the pilot control liquid provided by the pilot control valve 3 reaches the control port 414, the pressure on the first sealing surface 4151 is greater than the pressure on the second sealing surface 4152, and the valve core 415 blocks the working port 413.

[0059] It should be noted that during normal filtration, the pressure at the liquid inlet 412 is above 20 MPa, and the emulsion at the liquid inlet 412 can push the valve core 415 to move and open the working port 413. During backwashing, the pressure of the pilot control liquid entering the control port 414 is also above 20 MPa. At this time, the pressure at the liquid inlet 412 is equal to the pressure at the control port 414, but because the area of ​​the first sealing surface 4151 is larger than the area of ​​the second sealing surface 4152, the valve core 415 is pushed to isolate the liquid inlet 412 from the working port 413 due to the area difference between the two, thereby realizing liquid inlet cutoff.

[0060] like Figure 2 As shown, in some embodiments, the valve sleeve 411 includes a screw plug 4111, a guide sleeve 4112 and a lower valve sleeve 4113 which are sequentially connected along a third direction, and the inner cavity of the screw plug 4111, the inner cavity of the guide sleeve 4112 and the inner cavity of the lower valve sleeve 4113 are sequentially connected and together constitute a control cavity.

[0061] A control port 414 is provided at the end of the screw plug 4111 away from the guide sleeve 4112 , and an exhaust port 4114 is provided through the circumference of the screw plug 4111 .

[0062] A liquid inlet 412 is provided at the end of the lower valve sleeve 4113 away from the guide sleeve 4112 , and a working port 413 is provided on the circumferential surface of the lower valve sleeve 4113 .

[0063] The valve sleeve 411 is designed to be composed of a screw plug 4111 , a guide sleeve 4112 and a lower valve sleeve 4113 that are matched and connected, which facilitates the assembly between the valve sleeve 411 and the valve core 415 .

[0064] Specifically, the guide sleeve 4112 and the lower valve sleeve 4113 can be connected by interference fit. To ensure the normal operation of the valve core 415 (to be able to move normally along the third direction when the working port 413 is blocked), an exhaust port 4114 is provided on the peripheral surface of the screw plug 4111 to exhaust the air between the inner cavity of the screw plug 4111, the valve core 415 and the guide sleeve 4112. When the working port 413 is blocked, the lower valve sleeve 4113 abuts against the valve core 415, and a hard seal structure is formed between the two.

[0065] like Figure 2 As shown, in some embodiments, the guide sleeve 4112 and the screw plug 4111 are connected by a retaining ring 4115, and the retaining ring 4115 is a flexible open metal ring.

[0066] In order to facilitate the valve core assembly 41 to be pulled out or installed in one piece in the installation hole 14 during disassembly and assembly, and to improve the assembly efficiency between the valve core assembly 41 and the filter module, a retaining ring 4115 is used to fix the guide sleeve 4112 and the screw plug 4111, so that the screw plug 4111, the guide sleeve 4112 and the lower valve sleeve 4113 form a whole.

[0067] Specifically, the clamping ring 4115 is an open metal ring with a certain toughness.

[0068] like Figure 2 As shown, in some embodiments, the valve core 415 includes a first section 4153 and a second section 4154 connected in sequence, the first section 4153 is fitted in the inner cavity of the screw plug 4111, and the end of the first section 4153 facing away from the second section 4154 is provided with a first sealing surface 4151, the second section 4154 is fitted in the inner cavity of the guide sleeve 4112 and the inner cavity of the lower valve sleeve 4113 in sequence along a third direction, and the end of the second section 4154 facing away from the first section 4153 is provided with a second sealing surface 4152.

[0069] Specifically, in the filtering position, the first sealing surface 4151 abuts against the inner wall surface of the screw plug 4111 close to the control port 414 to seal the control port 414, and in the recoil position, the second sealing surface 4152 abuts against the inner wall surface of the lower valve sleeve 4113 to form a hard sealing structure.

[0070] like Figure 2 As shown, in some embodiments, at least one wear-resistant ring 416 is provided between the inner circumference of the guide sleeve 4112 and the outer circumference of the second section 4154 .

[0071] The design of the wear-resistant ring 416 can not only reduce the wear between the valve core 415 when it moves in the inner cavity of the guide sleeve 4112, thereby ensuring the service life of the valve core assembly 41, but also because of its flexible material, it can assist the valve core 415 in coaxial alignment in the control cavity of the valve sleeve 411.

[0072] Specifically, annular grooves are provided on the inner circumferential surface of the guide sleeve 4112 at intervals along the third direction, and the wear-resistant ring 416 is installed in the annular grooves in a matching manner.

[0073] Now, combined with the specific structure of the filtering module, its working process is described as follows:

[0074] During filtering, the emulsion source to be filtered supplies the emulsion to the liquid inlet 11, and the emulsion flows along the liquid supply and confluence channel 15 to the valve core assembly 41 of the liquid inlet control valve 4. At this time, the first sealing surface 4151 seals the control port 414, and the emulsion enters the working port 413 from the liquid inlet 412, and then enters the liquid inlet end of the filter element 2. The valve core assembly 41 of the sewage control valve 5 is a normally closed valve core assembly 41, and the emulsion is filtered in the filter element 2. The filtered emulsion flows out from the liquid outlet end of the filter element 2, enters the liquid supply and confluence channel 15 formed with the liquid outlet 12, and is supplied to the liquid supply system of the underground comprehensive mining equipment through the liquid outlet 12.

[0075] During backwashing, the pilot control valve 3 is started to work, so that the same pilot liquid of the pilot control valve 3 is supplied to the valve core assembly 41 of the liquid inlet control valve 4 and the valve core assembly 41 of the sewage control valve 5. Since the on-off control pressure of the liquid inlet control valve 4 is less than the on-off control pressure of the sewage control valve 5, the closing of the liquid inlet control valve 4 precedes the opening of the sewage control valve 5. At this time, in the valve core assembly 41 of the liquid inlet control valve 4, the pressure on the first sealing surface 4151 is greater than the pressure on the second sealing surface 4152, the valve core 415 blocks the working port 413, the valve core assembly 41 of the liquid inlet control valve 4 is closed, and the filter element 2 enters the backwash mode. The emulsion flows in the reverse direction from the liquid outlet end of the filter element 2 to the liquid inlet end of the filter element 2, driving the pollutants attached to the filter screen layer at the liquid inlet end of the filter element 2 to flow to the valve core assembly 41 of the sewage control valve 5 corresponding to the filter element 2, and discharged through the supply and confluence channel 15 to the sewage outlet 13 of the filter module.

[0076] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0077] 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 the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0078] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0079] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0080] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0081] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A filtering module, characterized in that: include: A valve body and at least two filter elements, wherein the valve body is provided with a liquid inlet, a liquid outlet and a sewage outlet, and all the filter elements are mounted outside the valve body and arranged at intervals along a first direction; as well as A pilot control valve, a liquid inlet control valve and a sewage control valve, wherein the pilot control valve is installed outside the valve body and is connected to the liquid inlet control valve and the sewage control valve, the liquid inlet control valve and the sewage control valve are provided with on-off control pressure by the same pilot liquid of the pilot control valve, the on-off control pressure of the liquid inlet control valve is less than the on-off control pressure of the sewage control valve, the liquid inlet control valve and the sewage control valve are both detachably installed inside the valve body and correspond one-to-one to the same filter element, the liquid inlet, the liquid inlet control valve, the corresponding filter element and the liquid outlet are connected in sequence, the corresponding filter element, the sewage control valve and the sewage outlet are connected in sequence, wherein the liquid inlet control valve and the sewage control valve are both connected to the liquid inlet end of the corresponding filter element.

2. The filter module according to claim 1, characterized in that: The liquid inlet control valve and the sewage discharge control valve both include a valve core assembly. A mounting hole is provided inside the valve body, and the valve core assembly is fitted in the mounting hole.

3. The filter module according to claim 1, characterized in that: Two liquid supply and confluence channels are provided inside the valve body, both extending along the first direction and having equal inner diameters. The two liquid supply and confluence channels are arranged at intervals along the second direction on the same horizontal plane, and the second direction is perpendicular to the first direction. Both ends of one of the liquid supply and confluence channels are coaxially provided with a connected liquid inlet, and both ends of the other liquid supply and confluence channel are coaxially provided with a connected liquid outlet.

4. The filter module according to claim 3, characterized in that: At least two filter elements are arranged on the valve body at intervals along the first direction, the liquid outlet ends of the filter elements are connected to the same liquid supply and collection channel formed with a liquid outlet, and the liquid inlet control valves connected to the liquid inlet end of each filter element are connected to the liquid supply and collection channel formed with a liquid inlet.

5. The filter module according to claim 4, characterized in that: The liquid inlet control valve and the sewage discharge control valve are arranged adjacent to each other along the first direction and are located above the liquid supply and confluence channel formed with a liquid inlet.

6. A valve core assembly of a liquid inlet control valve, characterized in that: include: a valve sleeve, the valve sleeve having a control chamber extending along a third direction and being provided with a liquid inlet, a working port and a control port communicating with the control chamber, the working port being located between the liquid inlet and the control port in the third direction, the liquid inlet being communicated with a liquid inlet, the working port being communicated with a filter element, and the control port being communicated with a pilot control valve; and A valve core is matched in the control chamber and has a filtering position for opening the working port and a recoil position for blocking the working port.

7. The valve core assembly of the liquid inlet control valve according to claim 6, characterized in that: The valve core has a first sealing surface and a second sealing surface, the first sealing surface seals the control port at the filtering position, the second sealing surface seals the liquid inlet at the backflushing position, and the area of ​​the first sealing surface is greater than that of the second sealing surface.

8. The valve core assembly of the liquid inlet control valve according to claim 7, characterized in that: The valve sleeve comprises a screw plug, a guide sleeve and a lower valve sleeve which are sequentially connected along a third direction, and the inner cavity of the screw plug, the inner cavity of the guide sleeve and the inner cavity of the lower valve sleeve are sequentially connected and together constitute the control cavity; The control port is provided at the end of the screw plug away from the guide sleeve, and a drain port is provided through the circumference of the screw plug; The end of the lower valve sleeve facing away from the guide sleeve is provided with the liquid inlet, and the peripheral surface of the lower valve sleeve is provided with the working port.

9. The valve core assembly of the liquid inlet control valve according to claim 8, characterized in that: The guide sleeve and the screw plug are connected via a clamping ring, which is a flexible open metal ring.

10. The valve core assembly of the liquid inlet control valve according to claim 8 or 9, characterized in that: The valve core includes a first section and a second section connected in sequence, the first section is matched in the inner cavity of the screw plug, the first sealing surface is provided at the end of the first section away from the second section, the second section is matched in the inner cavity of the guide sleeve and the inner cavity of the lower valve sleeve in sequence along the third direction, and the second sealing surface is provided at the end of the second section away from the first section.

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