Filter valve

Abstract

The utility model relates to a filter valve. The filter valve comprises a valve body, and the valve body is provided with a first opening, a second opening and a third opening. The axis of the first opening and the axis of the second opening are collinear, and the axis of the third opening is parallel to the axis of the first opening; the first opening and the second opening form a first flow channel, and the first opening and the third opening form a second flow channel; the second opening is provided with a flow limiting piece, the part, close to the first flow channel, of the valve body is provided with a filter screen, the side, away from the first flow channel, of the valve body is provided with a switch assembly, and the switch assembly is used for opening or closing the second flow channel. The filter valve can prevent large-particle impurities from entering a filter element of the water purifier, so that the service life of the filter element is prolonged.

Description

Technical Field

[0001] This application relates to the field of valves, and more particularly to a filter valve. Background Art

[0002] Due to the influence of the maintenance environment during the maintenance process, impurities such as sand and gravel may enter the water pipeline after maintenance. Thus, large particulate impurities may exist in the water flow during water supply. If the large particulate impurities enter the water purifier, the service life of the filter element in the water purifier will be affected. Utility Model Content

[0003] In view of this, this application provides a filter valve, which can prevent large particulate impurities from entering the filter element of the water purifier to extend the service life of the filter element.

[0004] This application provides a filter valve, including: a valve body, which has a first opening, a second opening, and a third opening;

[0005] The axis of the first opening is collinear with the axis of the second opening, and the axis of the third opening is parallel to the axis of the first opening; the first opening and the second opening form a first flow channel, and the first opening and the third opening form a second flow channel;

[0006] A flow limiting member is provided at the second opening, a filter screen is provided at a part of the valve body close to the first flow channel, and the filter screen separates the first flow channel and the second flow channel; a switch assembly is provided on a side of the valve body away from the first flow channel, and the switch assembly is used to open or close the second flow channel;

[0007] When the flow limiting member is opened, water flows out through the second flow channel and cleans the surface of the filter screen close to the second flow channel.

[0008] Further, the switch assembly includes:

[0009] A baffle plate, which is arranged in the second flow channel, and the cross section of the baffle plate is smaller than the cross section of the second flow channel;

[0010] A moving valve core, which is rotatably arranged in the second flow channel and is arranged on a side of the baffle plate away from the filter screen. The cross section of the moving valve core is smaller than the cross section of the second flow channel, and the moving valve core is used to open or close the second flow channel and control the flow rate of the second flow channel;

[0011] A driving member, which is connected to the moving valve core, and the driving member is used to drive the moving valve core to rotate.

[0012] Further, the movable valve core includes a diversion portion and a flow limiting portion, and the diversion portion is used to connect the second flow channel and the first flow channel.

[0013] Further, the size of the flow limiting portion is larger than that of the baffle plate. When the switch assembly closes the second flow channel, the flow limiting portion and the baffle plate seal the second flow channel.

[0014] Further, the valve body further includes: a main body portion and a limiting portion;

[0015] The baffle plate is arranged on the main body portion, and the third opening is arranged on one side of the main body portion along the axis direction parallel to the first opening; the limiting portion is arranged on both sides of the top of the main body portion along the axis of the main body portion, and the limiting portion is close to the limiting portion.

[0016] Further, the driving member is arranged outside the valve body along the axis of the movable valve core, and the driving member is connected to the movable valve core to drive the movable valve core to rotate.

[0017] Further, the driving member further includes a stopper, the stopper is arranged on the side of the driving member facing the valve body, and the stopper is arranged on the driving member at intervals along the outer periphery of the driving member.

[0018] Further, the filter valve further includes: a sealing member, and the sealing member is arranged on the outer periphery of the movable valve core.

[0019] Further, the filter screen includes: a filter net and a diaphragm, and the filter net and the diaphragm are arranged in sequence along the water flow direction.

[0020] Further, external threads are provided on the outer peripheries of the first opening, the second opening, and the third opening.

[0021] The above-mentioned filter valve intakes water through the first opening, and the water flow enters the valve body from the first opening. When water needs to be supplied to the water purifier, the valve is closed and the switch assembly is opened. The water flow flows out from the third opening through the second flow channel and flows into the water purifier. When the water flow passes through the filter element, the filter screen can filter large particle impurities in the water flow and retain the large particle impurities in the first flow channel, so that large particle impurities can be prevented from entering the water purifier and damaging the filter element of the water purifier. When the first flow channel needs to be cleaned, the switch assembly is closed and the valve body is opened to realize the cleaning of the first flow channel. Description of the Drawings

[0022] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the implementation. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 One of the structural schematic diagrams of the filter valve provided by the embodiment of the present application;

[0024] Figure 2 is Figure 1 The partial enlarged view at position A in

[0025] Figure 3 Another structural schematic diagram of the filter valve provided by the embodiment of the present application;

[0026] Figure 4 Another structural schematic diagram of the filter valve provided by the embodiment of the present application;

[0027] Figure 5 The structural schematic diagram of the moving valve core provided by the embodiment of the present application;

[0028] Figure 6 The structural schematic diagram of the baffle provided by the embodiment of the present application;

[0029] Figure 7 is along Figure 3 The partial enlarged view at position B in

[0030] Explanation of reference numerals:

[0031] 100 - filter valve; 10, valve body; 11, first opening; 12, second opening; 13, third opening; 14, first flow channel; 15, second flow channel; 16, main body part; 17, limiting part; 20, flow limiting part; 30, filter screen; 31, filter net; 32, diaphragm; 40, switch assembly; 41, baffle; 42, moving valve core; 421, flow guiding part; 422, flow limiting part; 43, driving part; 50, sealing part; 60, stop block. Specific embodiments

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0033] In the description, claims and the above-mentioned drawings of this application, terms such as "first" and "second" are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally further include steps or units not listed, or may optionally further include other steps or units inherent to these processes, methods, products or devices.

[0034] Reference to "embodiment" or "embodiment mode" in this context means that a specific feature, structure or characteristic described in connection with the embodiment or embodiment mode may be included in at least one embodiment of this application. The appearance of this phrase at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0035] Due to the influence of the maintenance environment during the maintenance process, impurities such as sand and gravel may enter the water pipeline after maintenance. In this way, large particulate impurities may exist in the water flow during water supply. If the large particulate impurities enter the water purifier, it will affect the service life of the filter element in the water purifier. However, the water pipelines in the current related technologies cannot restrict large particulate impurities in the water flow.

[0036] In view of this, this embodiment provides a filter valve 100, and the filter valve 100 can prevent large particulate impurities from entering the filter element of the water purifier to extend the service life of the filter element.

[0037] Please refer to Figure 1 , this application provides a filter valve 100, including: a valve body 10, the valve body 10 having a first opening 11, a second opening 12, and a third opening 13;

[0038] The axis of the first opening 11 is collinear with the axis of the second opening 12, and the axis of the third opening 13 is parallel to the axis of the first opening 11; the first opening 11 and the second opening 12 form a first flow channel 14, and the first opening 11 and the third opening 13 form a second flow channel 15;

[0039] A flow limiting member 20 is provided at the second opening 12, a filter screen 30 is provided at a part of the valve body 10 close to the first flow channel 14, and the filter screen 30 separates the first flow channel 14 and the second flow channel 15; a switch assembly 40 is provided on a side of the valve body 10 away from the first flow channel 14, and the switch assembly 40 is used to open or close the second flow channel 15;

[0040] When the flow limiter 20 is opened, water flows out through the second flow channel 15 and cleans the surface of the filter screen 30 close to the second flow channel 15.

[0041] The above-mentioned filter valve 100 intakes water through the first opening 11, and the water flow enters the valve body 10 from the first opening 11. When water needs to be supplied to the water purifier, the valve is closed and the switch assembly 40 is opened. The water flow flows out from the third opening 13 through the second flow channel 15 and flows into the water purifier. When the water flow passes through the filter element, the filter screen 30 can filter large particulate impurities in the water flow and retain the large particulate impurities in the first flow channel 14, so as to avoid large particulate impurities entering the water purifier and damaging the filter element of the water purifier. When the first flow channel 14 needs to be cleaned, the switch assembly 40 is closed and the valve body 10 is opened to clean the first flow channel 14.

[0042] It can be understood that the first opening 11 is used for water intake. The second opening 12 is arranged relative to the first opening 11, and the axis of the second opening 12 is collinear with the axis of the first opening 11. The first opening 11 and the second opening 12 form the first flow channel 14. The water flow flows into the first flow channel 14 from the first opening 11 and flows out from the second opening 12; A flow limiter 20 is arranged on the second opening 12. The flow limiter 20 is detachably arranged on the second opening 12. The flow limiter 20 is used to open or close the second opening 12. When the flow limiter 20 is installed on the second opening 12, the water flow cannot be discharged from the second opening 12. When the flow limiter 20 is removed, the water flow can flow out through the second opening 12. The filter screen 30 separates the first flow channel 14 and the second flow channel 15. As Figure 1 shown, the part above the filter screen 30 is the second flow channel 15, and the part below the filter screen 30 is the first flow channel 14.

[0043] The valve body 10 is further provided with a third opening 13, which is used to connect to the water purifier. The third opening 13 is parallel to the axis of the first opening 11 and / or the second opening 12, and the third opening 13 can form the second flow channel 15 with the first opening 11.

[0044] It can be understood that a switch assembly 40 is arranged in the valve body 10. The switch assembly 40 is used to open or close the second flow channel 15. The axis of the switch assembly 40 is perpendicular to the axis of the first opening 11 and / or the axis of the second opening 12. The switch assembly 40 can rotate in the valve body 10, and the valve body 10 has a first preset position and a second preset position. When the switch assembly 40 rotates to the first preset position, the switch assembly 40 opens the second flow channel 15; When the second flow channel 15 is opened, the water flow enters the second flow channel 15 from the first opening 11, passes through the filtration of the filter screen 31 and enters the third opening 13, and then flows into the water purifier.

[0045] When the switch assembly 40 rotates to the second preset position, the switch assembly 40 closes the second flow channel 15. At this time, if the flow limiting member 20 is installed at the second opening 12, the water flow can only gather in the first flow channel 14. If the flow limiting member 20 is removed, the water flow can be discharged through the second opening 12. When it is necessary to clean the debris in the first flow channel 14, the flow limiting member 20 is removed, and the water flow can pass through the first flow channel 14 and the filter screen 30 in a large flow rate, that is, the first flow channel 14 and the filter screen 30 are flushed.

[0046] It can be understood that when the water flow flows into the second flow channel 15, the water flow first passes through the filter screen 30 for filtration, and the larger impurities are filtered and retained in the first flow channel 14, which may cause the first flow channel 14 to be blocked. In order to clean the first flow channel 14, the flow limiting member 20 can be selected to be opened. At this time, the water flow can flow out through the first flow channel 14. During the process of the water flow flowing out of the first flow channel 14, the water flow can clean the surface of the filter screen 30 close to the first flow channel 14 to discharge the debris in the first flow channel 14.

[0047] Please refer to Figure 3 , in some embodiments, the switch assembly 40 includes:

[0048] A baffle 41, the baffle 41 is arranged in the second flow channel 15, and the cross-section of the baffle 41 is smaller than the cross-section of the second flow channel 15;

[0049] A moving valve core 42, the moving valve core 42 is rotatably arranged in the second flow channel 15 and is arranged on the side of the baffle 41 away from the filter screen 30. The cross-section of the moving valve core 42 is smaller than the cross-section of the second flow channel 15, and the moving valve core 42 is used to open or close the second flow channel 15 and control the flow rate of the second flow channel 15;

[0050] A driving member 43, the driving member 43 is connected to the moving valve core 42, and the driving member 43 is used to drive the moving valve core 42 to rotate.

[0051] It can be understood that the baffle 41 is arranged in the second flow channel 15. The baffle 41 is used to limit the water flow rate of the second flow channel 15 and is also used to cooperate with the moving valve core 42 to close the second flow channel 15; the cross-section of the baffle 41 is smaller than the cross-section of the second flow channel 15, that is, the diameter of the baffle 41 is smaller than the diameter of the second flow channel 15. The baffle 41 can be 1 / 2 the size of the second flow channel 15, or 1 / 4 the size of the flow channel, or other sizes. As long as the baffle 41 and the moving valve core 42 can cooperate to seal the second flow channel 15.

[0052] The movable valve core 42 is rotatably arranged in the second flow channel 15 and is arranged on the side away from the filter screen 30. The cross-section of the movable valve core 42 is smaller than that of the second flow channel 15, that is, the size of the movable valve core 42 is smaller than that of the second flow channel 15. The movable valve core 42 can cooperate with the baffle 41 to open and close the second flow channel 15. Specifically, the movable valve core 42 is in the shape as Figure 5 shown, which is a sector. Similarly, the baffle 41 is also set as a sector, as Figure 6 shown. The sectors of the baffle 41 and the movable valve core 42 are complementary. The sum of the central angles of the baffle 41 and the movable valve is greater than 360°, so as to effectively seal the second flow channel 15.

[0053] When it is necessary to close the second flow channel 15, the movable valve core 42 rotates to the second preset position, that is, the position as Figure 3 shown. The movable valve core 42 is partially located in the missing part of the baffle 41. In this way, the movable valve core 42 and the baffle 41 can block the water flow to the outside, close the second flow channel 15, and the water flow cannot flow out through the third opening 13; when it is necessary to open the second flow channel 15, the movable valve core 42 rotates to the first preset position, that is, the position as Figure 4 shown. In this way, the movable valve core 42 moves away from the missing part of the baffle 41, the second flow channel 15 is opened, and the water flow can flow into the water purifier through the third opening 13.

[0054] A driving member 43 is also arranged outside the valve body 10. The driving member 43 is used to drive the movable valve core 42 to rotate so as to open or close the second flow channel 15.

[0055] Optionally, the above driving member 43 can be a driving member 43 such as a stepper motor, a servo motor, a handwheel, etc. that can drive the movable valve core 42 to rotate along its circumferential direction.

[0056] Please refer to Figure 5 , in some embodiments, the movable valve core 42 includes a diversion portion 421 and a flow limiting portion 422. The diversion portion 421 is used to connect the second flow channel 15 and the first flow channel 14.

[0057] It can be understood that the movable valve core 42 includes a diversion portion 421 and a flow limiting portion 422. When the second flow channel 15 is opened, the diversion portion 421 is misaligned with the baffle 41, and the flow limiting portion 422 partially overlaps with the baffle 41. The water flow can flow through the diversion portion 421 to the third opening 13. When the second flow channel 15 is closed, the diversion portion 421 overlaps with the baffle 41, and the diversion portion 421 is located in the missing part of the baffle 41, playing a role in blocking water and closing the second flow channel 15.

[0058] Please refer to Figure 5, in some embodiments, the size of the flow limiting portion 422 is greater than the size of the baffle 41. When the switch assembly 40 closes the second flow channel 15, the flow limiting portion 422 and the baffle 41 seal the second flow channel 15.

[0059] It can be understood that when the size of the baffle 41 is determined, that is, when the size of the baffle 41 is 1 / 2 of the size of the flow channel, the size of the flow limiting portion 422 is greater than the size of the baffle 41, which is to enable the flow limiting portion 422 to completely seal the second flow channel 15.

[0060] When it is necessary to close the second flow channel 15, the flow limiting portion 422 in the moving valve core 42 rotates to the second preset position, that is, the position shown in Figure 3 . The flow limiting portion 422 is located at the missing part of the baffle 41. In this way, the flow limiting portion 422 and the baffle 41 cooperate to block the water flow to the outside, so that the second flow channel 15 is closed and the water flow cannot flow out through the third opening 13; when it is necessary to open the second flow channel 15, the moving valve core 42 rotates to the first preset position, that is, the position shown in Figure 4 . In this way, the flow limiting portion 422 moves away from the missing part on the baffle 41, the second flow channel 15 is opened, and the water flow can flow into the water purifier through the third opening 13.

[0061] Please refer to Figure 3 , in some embodiments, the valve body 10 further includes: a main body portion 16 and a limiting portion 17;

[0062] The baffle 41 is disposed on the main body portion 16, and the third opening 13 is disposed on one side of the main body portion 16 along an axis direction parallel to the axis of the first opening 11; the limiting portion 17 is disposed on both sides of the top of the main body portion 16 along the axis of the main body portion 16, and the limiting portion 17 is disposed close to the limiting portion 17.

[0063] It can be understood that the valve body 10 includes a main body portion 16 and a limiting portion 17. The limiting portion 17 is used to limit the rotation of the driving member 43. The baffle 41, the switch assembly 40, and the filter element are disposed in the main body portion 16; the limiting portion 17 is disposed at intervals along the outer circumference of the top of the valve body 10, and the limiting portion 17 is disposed in the shape shown in Figure 7 . And a stopper 60 adapted to the limiting portion 17 is disposed on the driving member 43. In this way, when the driving member 43 rotates to the first preset position, the stopper 60 on the driving member 43 abuts against the limiting portion 17, thereby restricting the rotation of the driving member 43. At this time, the driving member 43 can rotate in the reverse direction; when the driving member 43 rotates to the second preset position, another stopper 60 on the driving member 43 abuts against another limiting portion 17 to restrict the driving member 43 from rotating in the reverse direction.

[0064] Please refer to Figure 4 and Figure 5, in some embodiments, the driving member 43 is disposed outside the valve body 10 along the axis of the moving valve core 42, and the driving member 43 is connected to the moving valve core 42 to drive the moving valve core 42 to rotate.

[0065] It can be understood that the driving member 43 is disposed outside the valve body 10 along the axis of the moving valve core 42. The driving member 43 is connected to the moving valve core 42 through a connecting rod. The driving member 43 can rotate along its circumferential direction. When the driving member 43 rotates, it can drive the moving valve core 42 to rotate. When the valve core rotates clockwise or counterclockwise, it can abut against the limiting portion 17. For example, when the driving member 43 rotates clockwise and abuts against the limiting portion 17, the driving member 43 drives the moving valve core 42 to be in the first position; when the driving member 43 rotates counterclockwise and abuts against another limiting portion 17, the driving member 43 drives the moving valve core 42 to be in the second position.

[0066] Please refer to Figure 3 and Figure 7 , in some embodiments, the driving member 43 further includes a stopper 60. The stopper 60 is disposed on a side of the driving member 43 facing the valve body 10, and the stopper 60 is spaced along the outer circumference of the driving member 43 on the driving member 43.

[0067] It can be understood that the stopper 60 is used to cooperate with the limiting portion 17 to limit the driving member 43. The stopper 60 is disposed on a side of the driving member 43 facing the valve body 10. When the driving member 43 rotates to the first preset position, the stopper 60 on the driving member 43 abuts against the limiting portion 17, thereby restricting the rotation of the driving member 43. At this time, the driving member 43 can rotate in the reverse direction; when the driving member 43 rotates to the second preset position, another stopper 60 on the driving member 43 abuts against another limiting portion 17 to restrict the driving member 43 from rotating in the reverse direction.

[0068] Please refer to Figure 5 , in some embodiments, the filter valve 100 further includes: a seal 50, and the seal 50 is disposed on the outer circumference of the moving valve core 42.

[0069] It can be understood that the seal 50 is disposed on the outer circumference of the moving valve core 42. The seal 50 is used to seal the outer circumference of the moving valve core 42 to prevent water leakage when the moving valve core 42 closes the second flow channel 15.

[0070] Optionally, the above-mentioned seal 50 can be an O-ring.

[0071] Please refer to Figure 2 , in some embodiments, the filter screen 30 includes: a filter net 31 and a diaphragm 32, and the filter net 31 and the diaphragm 32 are arranged in sequence along the water flow direction.

[0072] It can be understood that the filter screen 30 includes a filter net 31 and a diaphragm 32. The filter net 31 and the diaphragm 32 are arranged in sequence along the direction of the water flow, that is, the water flow first passes through the filter net 31 and then through the diaphragm 32, and then flows into the second flow channel 15. Among them, the filter net 31 is used to filter larger particles, while the diaphragm 32 can achieve a better filtering effect.

[0073] In some embodiments, external threads are provided on the outer peripheries of the first opening 11, the second opening 12, and the third opening 13.

[0074] It can be understood that providing external threads on the outer peripheries of the first opening 11, the second opening 12, and the third opening 13 can facilitate the connection of the pipeline to the first opening 11 or the second opening 12 or the third opening 13 to achieve the quick-release function.

[0075] In this application, the mention of "embodiment" and "implementation manner" means that the specific features, structures, or characteristics described in combination with the embodiment can be included in at least one embodiment of this application. The appearance of the above phrase at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described in this application can be combined with other embodiments. In addition, it should also be understood that the features, structures, or characteristics described in each embodiment of this application can be combined arbitrarily without contradiction to form another embodiment that does not deviate from the spirit and scope of the technical solution of this application.

[0076] Finally, it should be noted that the above implementation manners are only used to illustrate the technical solutions of this application and not to limit them. Although the technical solutions of this application have been described in detail with reference to the above preferred implementation manners, those of ordinary skill in the art should understand that modifications or equivalent replacements of the technical solutions of this application should not deviate from the spirit and scope of the technical solutions of this application.

Claims

1. A filter valve, characterized in that: include: a valve body having a first opening, a second opening, and a third opening; The axis of the first opening is collinear with the axis of the second opening, and the axis of the third opening is parallel to the axis of the first opening; The first opening and the second opening form a first flow channel, and the first opening and the third opening form a second flow channel; The second opening is provided with a flow limiting member, the portion of the valve body close to the first flow channel is provided with a filter screen, the filter screen separates the first flow channel from the second flow channel; the side of the valve body away from the first flow channel is provided with a switch assembly, the switch assembly is used to open or close the second flow channel; When the flow restriction member is opened, water flows out through the second flow channel and cleans the surface of the filter screen close to the second flow channel.

2. The filter valve according to claim 1, characterized in that: The switch assembly comprises: a baffle, the baffle being disposed in the second flow channel, the cross section of the baffle being smaller than the cross section of the second flow channel; A movable valve core, the movable valve core is rotatably disposed in the second flow channel and is disposed on a side of the baffle away from the filter screen, the cross section of the movable valve core is smaller than the cross section of the second flow channel, and the movable valve core is used to open or close the second flow channel and control the flow of the second flow channel; A driving member is connected to the movable valve core and is used to drive the movable valve core to rotate.

3. The filter valve according to claim 2, characterized in that: The movable valve core includes a flow guide portion and a flow limiting portion, and the flow guide portion is used to connect the second flow channel with the first flow channel.

4. The filter valve according to claim 3, characterized in that: The size of the flow limiting portion is greater than that of the baffle plate, and when the switch assembly closes the second flow channel, the flow limiting portion and the baffle plate seal the second flow channel.

5. The filter valve according to claim 4, characterized in that: The valve body further comprises: a main body portion and a limiting portion; The baffle is arranged on the main body, and the third opening is arranged on one side of the main body along an axial direction parallel to the first opening; the limiting portion is arranged on both sides of the top of the main body along the axis of the main body, and the limiting portion is arranged close to the limiting portion.

6. The filter valve according to claim 2, characterized in that: The driving member is disposed outside the valve body along the axis of the moving valve core, and the driving member is connected to the moving valve core to drive the moving valve core to rotate.

7. The filter valve according to claim 5, characterized in that: The driving member further includes a stopper, which is arranged on a side of the driving member facing the valve body, and the stopper is arranged on the driving member at intervals along the outer circumference of the driving member.

8. The filter valve according to claim 7, characterized in that: The filter valve further comprises a sealing member, which is arranged on the outer periphery of the movable valve core.

9. The filter valve according to claim 1, characterized in that: The filter screen comprises: a filter screen and a diaphragm, and the filter screen and the diaphragm are arranged in sequence along the water flow direction.

10. The filter valve according to claim 1, characterized in that: The outer circumferences of the first opening, the second opening and the third opening are provided with external threads.

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