Automatic reversing valve for filter station

Abstract

The invention relates to the technical field of reversing valves, in particular to an automatic reversing valve for a filter station. The automatic reversing valve comprises a valve body provided with a liquid passing connector used for being connected with a pipeline and a filtering connector used for being connected with a filtering station; the one-way valve core is embedded in the valve body; a hole channel structure is arranged in the valve body and used for enabling the liquid passing connector to be communicated with the one-way valve element and enabling the filtering connector to be communicated with the one-way valve element. According to the check valve, the hole channel structure and the four one-way valve elements are arranged in the valve body, the four one-way valve elements are communicated through the hole channel structure, logic control is conducted on the one-way valve elements through the hole channel structure, and the four one-way valve elements are matched pairwise to control liquid to change the flowing direction; by means of the reversing valve, liquid can reversely flow into the valve body from the liquid outlet of the reversing valve and flow out of the valve body from the liquid inlet of the reversing valve, hydraulic control or electric control or manual operation is not needed, and the hydraulic pipeline structure of the filter station can be greatly simplified through the reversing valve.

Description

Technical Field

[0001] The invention relates to the technical field of reversing valves, in particular to an automatic reversing valve used in a filtering station. Background Art

[0002] At present, hydraulic supports are one of the most commonly used hydraulic equipment in coal mines in my country's coal industry. Hydraulic supports generally use emulsions as the medium and are controlled by electro-hydraulic control systems. With the continuous improvement of productivity and safety requirements in the coal industry, higher requirements are also placed on electro-hydraulic control systems. In order to meet the new requirements for electro-hydraulic control systems, an emulsion backwash filter station is usually set up to flush the emulsion with the emulsion backwash filter station to improve the cleanliness of the emulsion and thereby improve the reliability of the electro-hydraulic control system. In addition, the liquid flow direction of the filter station is fixed to flow from the liquid inlet to the filter element and then out of the liquid outlet. If the inlet and outlet directions need to be swapped, the return liquid filter station can only be turned around as a whole to meet the requirements of the liquid flow direction.

[0003] However, the space in the underground tunnel is limited, and it is difficult for the filter station to change direction. In addition, the existing filter station generally uses a reversing valve with a rotary valve structure or a sliding valve structure. This type of reversing valve can only control and adjust the liquid to select different paths and flow in different directions after the liquid flows out of the liquid outlet of the valve body, and cannot achieve the effect of the liquid flowing into the valve body from the liquid outlet of the reversing valve in the reverse direction and flowing out of the valve body from the liquid inlet of the reversing valve. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the related art. To this end, the present invention proposes an automatic reversing valve for a filtration station, which optimizes the design of the flow channel in the valve body to achieve the purpose of enabling liquid to flow into the valve body from the liquid outlet of the reversing valve and flow out of the valve body from the liquid inlet of the reversing valve in reverse direction.

[0005] The present invention provides an automatic reversing valve for a filtering station, the automatic reversing valve comprising: The valve body is provided with a liquid-passing interface for connecting to a pipeline and a filtering interface for connecting to a filtering station; A one-way valve core, embedded in the valve body; Wherein, a channel structure is arranged in the valve body, which is used to connect the liquid-passing interface with the one-way valve core and the filter interface with the one-way valve core.

[0006] According to an automatic reversing valve for a filter station provided by the present invention, four one-way valve cores are symmetrically arranged and embedded in the upper and lower ends of the valve body, and are arranged as a first valve core, a second valve core, a third valve core and a fourth valve core in a clockwise direction from the upper left end of the valve body; The liquid-passing interface comprises a first interface arranged at the left end of the valve body and a second interface arranged at the right end of the valve body; The liquid can pass through the first valve core and the fourth valve core unidirectionally via the channel structure, and then flow from the first interface to the second interface; or, the liquid can pass through the second valve core and the third valve core unidirectionally via the channel structure, and then flow from the second interface to the first interface.

[0007] According to an automatic reversing valve for a filtration station provided by the present invention, the channel structure includes a first channel connected from the liquid interface to the one-way valve core, which is used to make the one-way valve cores in the valve body cooperate with each other to achieve automatic reversal of the liquid.

[0008] According to an automatic reversing valve for a filtering station provided by the present invention, the first channel is provided with a left branch symmetrically distributed at the left end of the valve body and a right branch symmetrically distributed at the right end of the valve body; The left branch connects the liquid inlet end of the first valve core and the liquid outlet end of the fourth valve core in parallel with the first interface, and the right branch connects the liquid inlet end of the second valve core and the liquid outlet end of the third valve core in parallel with the second interface.

[0009] According to an automatic reversing valve for a filtering station provided by the present invention, the filtering interface comprises a third interface provided at the upper end of the valve body and a fourth interface provided at the lower end of the valve body; The channel structure includes a second channel connected from the filter interface to the one-way valve core, which is used to allow the liquid to flow from the third interface to the filter station in one direction and then flow from the filter station to the fourth interface.

[0010] According to an automatic reversing valve for a filtering station provided by the present invention, the second channel includes an upper branch and a lower branch; The upper branch connects the liquid outlet end of the first valve core and the liquid outlet end of the second valve core in parallel with the third interface; The lower branch connects the liquid inlet end of the third valve core and the liquid inlet end of the fourth valve core in parallel with the fourth interface.

[0011] According to an automatic reversing valve for a filtering station provided by the present invention, the valve body is provided with a groove with a conical bottom, the liquid inlet end surface of the one-way valve core is a plane, the liquid inlet end of the one-way valve core abuts against the groove bottom of the groove and forms a conical cavity; The channel structure extends to the conical cavity and forms an orifice on the surface of the conical cavity to communicate with the liquid inlet end of the one-way valve core.

[0012] According to an automatic reversing valve for a filtering station provided by the present invention, the one-way valve core comprises a screw sleeve, an end plug and a movable part; The screw sleeve is provided with a liquid outlet hole, the end plug is provided with a liquid inlet hole, and the movable member is arranged in the screw sleeve so as to be movable up and down, and is used for switching the on-off state of the liquid inlet hole and the liquid outlet hole.

[0013] According to an automatic reversing valve for a filtering station provided by the present invention, the one-way valve core further comprises an elastic member, which is arranged between the bottom surface of the movable member and the lower end of the screw sleeve, and is used to provide an upward supporting force to the movable member so that the movable member abuts against the end plug; An annular cavity is formed between the upper end of the movable part and the screw sleeve, and the annular cavity is connected to the liquid outlet hole; a closed cavity is formed between the lower end of the movable part and the lower end of the screw sleeve, and the movable part is provided with a balancing hole extending from the annular cavity to the bottom surface of the movable part, which is used to ensure that the one-way valve core is connected only when the liquid inlet end is pressurized.

[0014] According to an automatic reversing valve for a filtration station provided by the present invention, the one-way valve core also includes a valve seat arranged on the top surface of the movable part. Under the action of the elastic part, the valve seat is in close contact with the bottom surface of the end plug to separate the liquid inlet hole and the annular cavity.

[0015] The above one or more technical solutions in the present invention have at least one of the following technical effects: A channel structure and four one-way valve cores are arranged in the valve body, and the four one-way valve cores are connected through the channel structure. The one-way valve cores are logically controlled by utilizing the channel structure, so that the four one-way valve cores cooperate with each other in pairs to control the change of flow direction of the liquid, so that the liquid can flow into the valve body from the liquid outlet of the reversing valve and flow out of the valve body from the liquid inlet of the reversing valve in the reverse direction, and no hydraulic control, electric control or manual operation is required. The reversing valve can greatly simplify the hydraulic pipeline structure of the filter station.

[0016] In addition to the technical problems solved by the present invention, the technical features of the technical solutions constituted, and the advantages brought about by the technical features of these technical solutions described above, other technical features of the present invention and the advantages brought about by these technical features will be further explained in conjunction with the accompanying drawings or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1A schematic diagram of the three-dimensional structure of an automatic reversing valve provided in an embodiment of the present invention.

[0019] Figure 2 A schematic diagram of the channel structure of the automatic reversing valve provided in an embodiment of the present invention.

[0020] Figure 3 A schematic side view of a valve body of an automatic reversing valve provided in an embodiment of the present invention.

[0021] Figure 4 for Figure 3 Schematic diagram of the cross-section of the AA section about the channel structure.

[0022] Figure 5 for Figure 3 Schematic diagram of the cross-section of the DD section about the channel structure.

[0023] Figure 6 for Figure 3 Schematic diagram of the cross-sectional view of the pore structure at section EE.

[0024] Figure 7 A schematic diagram of the distribution position of the one-way valve core in the automatic reversing valve provided in an embodiment of the present invention.

[0025] Figure 8 A schematic cross-sectional view of a one-way valve core provided in an embodiment of the present invention.

[0026] Reference numerals: 100, valve body; 110, liquid connection interface; 111, first interface; 112, second interface; 120, filter interface; 121, third interface; 122, fourth interface; 130, channel structure; 131, first channel; 131a, left branch; 131b, right branch; 132, second channel; 132a, upper branch; 132b, lower branch; 140, groove; 141, conical cavity; 200, one-way valve core; 201, first valve core; 202, second valve core; 203, third valve core; 204, fourth valve core; 210, screw sleeve; 211, liquid outlet; 220, end plug; 221, liquid inlet; 230, movable part; 231, balance hole; 240, elastic part; 250, annular cavity; 260, valve seat. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0029] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0030] In the embodiments of the present invention, 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.

[0031] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means 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 embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described 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.

[0032] like Figures 1 to 8 As shown, in an embodiment of the present invention, an automatic reversing valve for a filtering station is introduced.

[0033] The automatic reversing valve comprises a valve body 100 and a plurality of one-way valve cores 200. Specifically, the valve body 100 is provided with a liquid-passing interface 110 for connecting a pipeline and a filter interface 120 for connecting a filter station. The one-way valve core 200 is embedded in the valve body 100.

[0034] In particular, a channel structure 130 is provided in the valve body 100 for connecting the liquid interface 110 and the filter interface 120 to the one-way valve core 200. The liquid interface 110 is connected to the one-way valve core 200. And the filter interface 120 is connected to the one-way valve core 200.

[0035] Furthermore, four one-way valve cores 200 are installed in the valve body 100 of the automatic reversing valve. The four one-way valve cores 200 are symmetrically arranged and embedded in the upper and lower ends of the valve body 100, and are arranged as the first valve core 201, the second valve core 202, the third valve core 203 and the fourth valve core 204 in a clockwise direction from the upper left end of the valve body 100.

[0036] The channel structure 130 connects the four one-way valve cores 200 so that the four one-way valve cores 200 can cooperate with each other to control and change the flow direction of the liquid.

[0037] The one-way valve core 200 includes a threaded sleeve 210, an end plug 220, a valve seat 260, a movable part 230, a clamping screw and an elastic part 240. The clamping screw fixes the valve seat 260 on the movable part 230 through a threaded connection. An elastic part 240 is placed between the movable part 230 and the threaded sleeve 210. The movable part 230 is provided with a balancing hole 231 that connects its bottom end with the liquid outlet. Under normal conditions, the movable part 230, under the action of the spring force, tightly contacts the valve seat 260 with the end plug 220 to form a sealing belt.

[0038] When high-pressure liquid is passed through the liquid inlet and liquid outlet of the one-way valve core 200, the pressure of the liquid inlet and liquid outlet of the one-way valve core 200 is balanced. The movable member 230 of the one-way valve core 200 is in close contact with the end plug 220 under the support of the elastic member 240, so that the pipeline is in a disconnected state. When high-pressure liquid is passed only through the liquid inlet of the one-way valve core 200, and the pressure at the liquid inlet is greater than the supporting force of the elastic member 240, the movable member 230 moves downward and a gap appears between it and the end plug 220, so that the pipeline is in a connected state.

[0039] like Figure 2As shown, the connector A of the automatic reversing valve is connected to the liquid inlet end of the first valve core 201 and the liquid outlet end of the fourth valve core 204, and the connector B is connected to the liquid inlet end of the second valve core 202 and the liquid outlet end of the third valve core 203. The liquid outlet end of the first valve core 201 and the liquid outlet end of the second valve core 202 are connected to the connector C, and the liquid inlet end of the third valve core 203 and the liquid inlet end of the fourth valve core 204 are connected to the connector D.

[0040] The connectors A and B of the automatic reversing valve can be connected to both the inlet and outlet liquids. The connector C can only be connected to the inlet liquid of the filter element of the filter station, and the connector D can only be connected to the outlet liquid of the filter element of the filter station, so as to ensure that the filter element maintains the same filtering direction for the liquid while satisfying the automatic conversion of the inlet and outlet liquid directions.

[0041] When liquid enters from side A, the first valve core 201 is opened by hydraulic force, and the liquid flows into the filter station from joint C through the first valve core 201. The liquid filtered by the filter station flows out from joint D, and the fourth valve core 204 remains closed because its liquid inlet and liquid outlet are both connected to high-pressure liquid. The third valve core 203 is opened by hydraulic force, and the filtered liquid flows out from the side of joint B through the third valve core 203. The second valve core 202 remains closed to prevent liquid backflow because its liquid inlet and liquid outlet are both connected to high-pressure liquid.

[0042] When liquid enters from the B side, the second valve core 202 is opened by hydraulic force, and the liquid flows into the filter station from the joint C through the second valve core 202. The liquid filtered by the filter station flows out from the joint D. The third valve core 203 remains closed because its inlet and outlet ends are both connected to high-pressure liquid. The fourth valve core 204 is opened by hydraulic force, and the filtered liquid flows out from the joint A side through the fourth valve core 204. The first valve core 201 remains closed to prevent liquid backflow because its inlet and outlet ends are both connected to high-pressure liquid.

[0043] In this embodiment, a channel structure 130 and four one-way valve cores 200 are provided in the valve body 100. The four one-way valve cores 200 are connected via the channel structure 130. The one-way valve cores 200 are logically controlled by the channel structure 130, so that the four one-way valve cores 200 cooperate with each other to control the change of flow direction of the liquid, so that the liquid can flow into the valve body 100 from the liquid outlet of the reversing valve and flow out of the valve body 100 from the liquid inlet of the reversing valve in the opposite direction, and no hydraulic control, electric control or manual operation is required. The reversing valve can greatly simplify the hydraulic pipeline structure of the filter station.

[0044] Based on the above embodiment, another embodiment of the present invention introduces an automatic reversing valve for a filtering station.

[0045] like Figure 7As shown, four one-way valve cores 200 are symmetrically arranged and embedded in the upper and lower ends of the valve body 100, and are arranged as the first valve core 201, the second valve core 202, the third valve core 203 and the fourth valve core 204 in clockwise direction from the upper left end of the valve body 100.

[0046] like Figures 3 to 6 As shown, the liquid connection port 110 includes a first connection port 111 disposed at the left end of the valve body 100 and a second connection port 112 disposed at the right end of the valve body 100 .

[0047] The liquid can pass through the first valve core 201 and the fourth valve core 204 unidirectionally via the channel structure 130 to flow from the first interface 111 to the second interface 112 ; alternatively, the liquid can pass through the second valve core 202 and the third valve core 203 unidirectionally via the channel structure 130 to flow from the second interface 112 to the first interface 111 .

[0048] Based on the above embodiment, another embodiment of the present invention introduces an automatic reversing valve for a filtering station.

[0049] The channel structure 130 includes a first channel 131 connected from the liquid connection interface 110 to the one-way valve core 200, which is used to make the one-way valve cores 200 in the valve body 100 cooperate with each other to achieve automatic reversal of the liquid.

[0050] Furthermore, the first channel 131 is provided with a left branch 131 a symmetrically distributed at the left end of the valve body 100 and a right branch 131 b at the right end of the valve body 100 .

[0051] The left branch 131a connects the liquid inlet of the first valve core 201 and the liquid outlet of the fourth valve core 204 in parallel with the first interface 111 , and the right branch 131b connects the liquid inlet of the second valve core 202 and the liquid outlet of the third valve core 203 in parallel with the second interface 112 .

[0052] Furthermore, the filter interface 120 includes a third interface 121 provided at the upper end of the valve body 100 and a fourth interface 122 provided at the lower end of the valve body 100 .

[0053] The channel structure 130 includes a second channel 132 connected from the filter interface 120 to the one-way valve core 200 , which is used to allow the liquid to flow from the third interface 121 to the filter station and then flow from the filter station to the fourth interface 122 unidirectionally.

[0054] Furthermore, the second channel 132 is provided with an upper branch 132a which connects the liquid outlet end of the first valve core 201 and the liquid outlet end of the second valve core 202 in parallel with the third interface 121, and a lower branch 132b which connects the liquid inlet end of the third valve core 203 and the liquid inlet end of the fourth valve core 204 in parallel with the fourth interface 122.

[0055] Based on the above embodiment, another embodiment of the present invention introduces an automatic reversing valve for a filtering station.

[0056] The valve body 100 is provided with a groove 140 with a conical bottom. The liquid inlet end surface of the one-way valve core 200 is a plane. The liquid inlet end of the one-way valve core 200 abuts against the bottom of the groove 140 and forms a conical cavity 141.

[0057] The channel structure 130 extends to the conical cavity 141 and forms an orifice on the surface of the conical cavity 141 to communicate with the liquid inlet end of the one-way valve core 200 .

[0058] Furthermore, if Figure 8 As shown, the one-way valve core 200 includes a threaded sleeve 210 , an end plug 220 and a movable part 230 .

[0059] The screw sleeve 210 is provided with a liquid outlet hole 211 , the end plug 220 is provided with a liquid inlet hole 221 , and the movable member 230 is movably disposed in the screw sleeve 210 to switch the on / off state of the liquid inlet hole 221 and the liquid outlet hole 211 .

[0060] Furthermore, the one-way valve core 200 also includes an elastic member 240 , which is disposed between the bottom surface of the movable member 230 and the lower end of the screw sleeve 210 , and is used to provide an upward supporting force to the movable member 230 so that the movable member 230 abuts against the end plug 220 .

[0061] An annular cavity 250 is formed between the upper end of the movable part 230 and the screw sleeve 210, and the annular cavity 250 is connected to the liquid outlet hole 211; a closed cavity is formed between the lower end of the movable part 230 and the lower end of the screw sleeve 210, and the movable part 230 is provided with a balancing hole 231 extending from the annular cavity 250 to the bottom surface of the movable part 230, which is used to ensure that the one-way valve core 200 is connected only when the liquid inlet end is pressurized.

[0062] Furthermore, the one-way valve core 200 also includes a valve seat 260 disposed on the top surface of the movable member 230 . Under the action of the elastic member 240 , the valve seat 260 is in close contact with the bottom surface of the end plug 220 to separate the liquid inlet hole 221 from the annular cavity 250 .

[0063] Specifically, the upper portion of the screw sleeve 210 is configured as a cylindrical thin wall with an open top, the end plug 220 is covered on the top of the screw sleeve 210, and the movable member 230 is embedded in the screw sleeve 210 so as to be movable up and down.

[0064] The cylindrical thin wall of the screw sleeve 210 is provided with a liquid outlet 211. The cross section of the upper end of the movable member 230 is smaller than the cross section of the lower end of the movable member 230. When the movable member 230 is sleeved in the screw sleeve 210, the lower end of the movable member 230 is closely fitted with the inner side wall of the screw sleeve 210. An annular cavity 250 is formed between the upper end of the movable member 230 and the inner side wall of the screw sleeve 210. The annular cavity 250 is communicated with the liquid outlet 211.

[0065] The end plug 220 is provided with a liquid inlet hole 221 penetrating along the central axis thereof. When the movable member 230 moves upward to a position abutting against the end plug 220 , the movable member 230 separates the liquid inlet hole 221 from the annular cavity 250 .

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic reversing valve for a filtration station, characterized in that: include: The valve body (100) is provided with a liquid-passing interface (110) for connecting to a pipeline and a filtering interface (120) for connecting to a filtering station; A one-way valve core (200) is embedded in the valve body (100); The valve body (100) is provided with a channel structure (130) for connecting the liquid passage interface (110) and the one-way valve core (200) and the filter interface (120) and the one-way valve core (200).

2. The automatic reversing valve for a filtration station according to claim 1, characterized in that: The four one-way valve cores (200) are symmetrically arranged and embedded in the upper and lower ends of the valve body (100), and are arranged in sequence from the upper left end of the valve body (100) in a clockwise direction as a first valve core (201), a second valve core (202), a third valve core (203) and a fourth valve core (204); The liquid connection interface (110) comprises a first interface (111) arranged at the left end of the valve body (100) and a second interface (112) arranged at the right end of the valve body (100); The liquid can pass through the first valve core (201) and the fourth valve core (204) unidirectionally via the channel structure (130), thereby flowing from the first interface (111) to the second interface (112); or the liquid can pass through the second valve core (202) and the third valve core (203) unidirectionally via the channel structure (130), thereby flowing from the second interface (112) to the first interface (111).

3. The automatic reversing valve for a filtration station according to claim 2, characterized in that: The channel structure (130) comprises a first channel (131) connected from the liquid passage interface (110) to the one-way valve core (200), which is used to enable the one-way valve cores (200) in the valve body (100) to cooperate with each other to achieve automatic reversal of liquid.

4. The automatic reversing valve for a filtering station according to claim 3, characterized in that: The first channel (131) is provided with a left branch (131a) symmetrically distributed at the left end of the valve body (100) and a right branch (131b) at the right end of the valve body (100); The left branch (131a) connects the liquid inlet end of the first valve core (201) and the liquid outlet end of the fourth valve core (204) in parallel with the first interface (111), and the right branch (131b) connects the liquid inlet end of the second valve core (202) and the liquid outlet end of the third valve core (203) in parallel with the second interface (112).

5. The automatic reversing valve for a filtering station according to any one of claims 1 to 4, characterized in that: The filter interface (120) comprises a third interface (121) arranged at the upper end of the valve body (100) and a fourth interface (122) arranged at the lower end of the valve body (100); The channel structure (130) comprises a second channel (132) connected from the filter interface (120) to the one-way valve core (200), and is used to allow liquid to flow unidirectionally from the third interface (121) into the filter station and then flow from the filter station to the fourth interface (122).

6. The automatic reversing valve for a filtering station according to claim 5, characterized in that: The second channel (132) comprises an upper branch (132a) and a lower branch (132b); The upper branch (132a) connects the liquid outlet end of the first valve core (201) and the liquid outlet end of the second valve core (202) in parallel with the third interface (121); The lower branch (132b) connects the liquid inlet end of the third valve core (203) and the liquid inlet end of the fourth valve core (204) in parallel with the fourth interface (122).

7. The automatic reversing valve for a filtering station according to claim 6, characterized in that: The valve body (100) is provided with a groove (140) whose bottom is a conical surface, the liquid inlet end surface of the one-way valve core (200) is a plane, and the liquid inlet end of the one-way valve core (200) abuts against the bottom of the groove (140) to form a conical cavity (141); The channel structure (130) extends to the conical cavity (141) and forms an orifice on the surface of the conical cavity (141) to communicate with the liquid inlet end of the one-way valve core (200).

8. The automatic reversing valve for a filtering station according to claim 6, characterized in that: The one-way valve core (200) comprises a threaded sleeve (210), an end plug (220) and a movable part (230); The screw sleeve (210) is provided with a liquid outlet hole (211), the end plug (220) is provided with a liquid inlet hole (221), and the movable member (230) is arranged in the screw sleeve (210) so as to be movable up and down, and is used to switch the on and off states of the liquid inlet hole (221) and the liquid outlet hole (211).

9. The automatic reversing valve for a filtering station according to claim 8, characterized in that: The one-way valve core (200) further comprises an elastic member (240) disposed between the bottom surface of the movable member (230) and the lower end of the screw sleeve (210), and used for providing an upward supporting force to the movable member (230) so that the movable member (230) abuts against the end plug (220); An annular cavity (250) is formed between the upper end of the movable member (230) and the screw sleeve (210), and the annular cavity (250) is communicated with the liquid outlet hole (211); a closed cavity is formed between the lower end of the movable member (230) and the lower end of the screw sleeve (210), and the movable member (230) is provided with a balancing hole (231) extending from the annular cavity (250) to the bottom surface of the movable member (230), for ensuring that the one-way valve core (200) is communicated only when the liquid inlet end is under pressure.

10. The automatic reversing valve for a filtering station according to claim 9, characterized in that: The one-way valve core (200) further comprises a valve seat (260) arranged on the top surface of the movable member (230); under the action of the elastic member (240), the valve seat (260) is in close contact with the bottom surface of the end plug (220) to separate the liquid inlet hole (221) from the annular cavity (250).

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