Gate valve with filtering function

Abstract

The invention discloses a gate valve with a filtering function. The gate valve comprises a filter element assembly; a filter element assembly is detachably mounted in the valve body and is used for filtering impurities in a medium; the filter element service life detection device comprises a first pressure detection unit installed on the first side of a filter element assembly and used for detecting the pressure P1 of the first side of the filter element assembly; the second pressure detection unit is mounted on the second side of the filter element assembly and is used for detecting the pressure P2 of the second side of the filter element assembly; a filter element assembly replacing mechanism; and the controller is configured to send a filter element assembly replacement signal S replacement to the filter element assembly replacement mechanism if P1-P2 is larger than or equal to P, and the filter element replacement mechanism replaces the filter element assembly installed in the valve body based on the received S replacement. The embodiment of the invention has the beneficial effects that the replacement opportunity of the filter element assembly is automatically identified; and after the replacement time is automatically identified, the filter element can be automatically replaced.

Description

Technical Field

[0001] The invention relates to a hydraulic element, in particular to a gate valve with a filtering function. Background Art

[0002] Gate valves are usually installed in pipelines, and the flow of the medium in the pipeline is adjusted by the opening of the gate valve. In some scenarios, the medium being transported contains particles. In order to improve the purity of the medium and prevent the particles from affecting the operation of the gate valve or other hydraulic components, components with filtering functions are usually used in practice to perform filtering.

[0003] For example, the invention patent application with the publication number "CN117469413A" discloses a filter screen cover to intercept particulate impurities to avoid clogging of the valve chamber. However, the inventors found that as more and more particulate matter was intercepted, the permeability of the filter screen cover became worse and worse, and it was even completely blocked in the end and the medium could not pass through. It can only open the valve and then replace the new filter screen cover or clean the blocked filter screen cover. First of all, the user has no way of knowing when the filter screen cover needs to be replaced or cleaned; even if it is blindly replaced and cleaned according to the length of use (such as 1 month), the work is cumbersome. At the same time, because the particulate matter carried in the medium is actually dynamic, the filter screen cover may be completely blocked during actual replacement and cleaning, or it may be far from the point of needing replacement and cleaning.

[0004] Therefore, in order to solve the technical problem that it is impossible to know the replacement or cleaning timing of the filter component and the replacement or cleaning depends on manual operation, the present invention discloses a gate valve with a filtering function. Summary of the invention

[0005] The object of the present invention is to provide a gate valve with a filtering function, which can automatically detect the replacement timing of the filter element assembly according to the blockage degree of the filter element assembly, avoid premature replacement or late replacement, and solve the above-mentioned technical problems.

[0006] To achieve the above object, the present invention discloses a gate valve with filtering function, which comprises:

[0007] Filter element assembly;

[0008] A valve body, in which the filter element assembly is detachably installed to filter out impurities in the medium;

[0009] Filter element life detection device, including:

[0010] The first pressure detection unit installed on the first side of the filter element assembly is used to detect the pressure P on the first side of the filter element assembly. 1 ;

[0011] The second pressure detection unit installed on the second side of the filter element assembly is used to detect the pressure P on the second side of the filter element assembly. 2 ;

[0012] Filter element assembly replacement mechanism;

[0013] controller, configured as follows: If |P 1 -P 2 |≥△P, send a filter element replacement signal S to the filter element replacement mechanism 更换 The filter element replacement mechanism is based on the received S 更换 Replace the filter element assembly installed in the valve body.

[0014] Furthermore, the valve body comprises:

[0015] A valve body is formed with a medium inlet, a medium outlet and a valve cavity communicating therebetween;

[0016] A valve core is installed in the valve cavity in an openable and closable manner;

[0017] The avoidance joint assembly comprises an avoidance joint, which is detachably mounted on the medium inlet and can move in a direction away from the medium inlet when the avoidance joint is removed to provide an avoidance space for the filter element assembly to enter. The filter element assembly is mounted between the avoidance joint and the medium inlet.

[0018] Furthermore, the avoidance joint assembly also includes:

[0019] a first sealing ring;

[0020] A sealing sleeve, wherein the avoidance joint is sleeved in the sealing sleeve and is sealingly and slidably connected to the sealing sleeve via the first sealing ring;

[0021] A second sealing ring;

[0022] A connector, the connector is sleeved in the sealing sleeve and is sealingly and slidingly connected to the sealing sleeve via the second sealing ring.

[0023] Furthermore, a first limiting portion for blocking a sliding position of the sealing sleeve is formed on the outer side of the avoidance joint, and a second limiting portion for blocking a sliding position of the sealing sleeve is formed on the outer side of the connecting head.

[0024] Furthermore, the filter element assembly comprises:

[0025] Filter element;

[0026] The supporting shell includes a first subshell and a second subshell, wherein the first subshell and the second subshell are both formed with a semi-annular fixing groove, and when the first subshell and the second subshell are buckled together, the two fixing grooves form a circular fixing chamber for installing the filter element.

[0027] Further, the first end of the first partial shell is rotatably connected to the first end of the second partial shell, and the second end of the first partial shell is detachably connected to the second end of the second partial shell via a buckle.

[0028] Furthermore, the filter element assembly replacement mechanism comprises:

[0029] Fixed plate;

[0030] A support rod, a first end of which is fixed to the fixing plate, the fixing plate is fixed to the outer wall of the first sub-shell or the second sub-shell, the number of the support rods and the number of the filter element assemblies are both multiple and one-to-one corresponding, and the multiple filter element assemblies are evenly arranged around the rotating shaft;

[0031] A rotating shaft, the second end of the support rod being fixed to the rotating shaft;

[0032] Position adjustment mechanism;

[0033] First base;

[0034] A second base is arranged at an adjustable distance relative to the first base under the drive of a position adjustment mechanism;

[0035] The rotating shaft is rotatably mounted on the first base or the second base under the drive of the position adjustment mechanism.

[0036] Furthermore, the position adjustment mechanism further comprises:

[0037] Distance drive unit;

[0038] A lead screw, driven by the distance driving unit to rotate, so as to adjust the distance between the second base and the first base;

[0039] The guide column guides the movement of the second base relative to the second base.

[0040] Further, a support base is fixed on each of the first base and the second base, and the position adjustment mechanism further includes four swing arms arranged in a rectangular shape, the first ends of the four swing arms are hinged to the support base, and the second ends of the four swing arms are hinged to the rotating shaft, wherein:

[0041] The position adjustment mechanism also includes positioning pins, which are respectively used to lock the rotation angle of the swing arm relative to the rotation axis.

[0042] Further, a support base is fixed on each of the first base and the second base, and the position adjustment mechanism further includes four swing arms arranged in a rectangular shape, the first ends of the four swing arms are hinged to the support base, and the second ends of the four swing arms are hinged to the rotating shaft, wherein:

[0043] The position adjustment mechanism also includes a rotation drive unit and a rotation angle detection unit. The rotation drive unit drives the rotating shaft to rotate. The rotation angle detection unit is used to detect the rotation angle of the rotating shaft. The number of the filter element assemblies is N. The controller is also configured to: each time the filter element is replaced, the angle of driving the rotating shaft to rotate is 360° / N.

[0044] The beneficial effects of the present invention are as follows:

[0045] 1. Automatically identify when to replace the filter element

[0046] Detect the pressure difference on both sides of the filter element assembly |P 1 -P 2 |, and then compared with the preset pressure value △P, as the number of particles trapped by the filter element increases, the filter element's permeability decreases, and the pressure difference on both sides |P 1 -P 2 | increases, so |P 1 -P 2 The size of | is a strict basis for replacing the filter element assembly. If |P 1 -P 2 |≥△P (preset value), it indicates that the filter element assembly's permeability has decreased to the point where it needs to be replaced, thereby automatically identifying the time to replace the filter element assembly;

[0047] 2. After automatically identifying the replacement time, the filter element can be automatically replaced

[0048] When the replacement opportunity is identified, a filter element replacement signal S is sent to the filter element replacement mechanism. 更换 The filter element replacement mechanism is based on the received S 更换 Replace the filter element assembly installed in the valve body, so that it can be replaced automatically, freeing up manual work. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of a gate valve with filtering function according to the present invention from a first viewing angle;

[0050] Figure 2 for Figure 1 A partial enlarged view of the middle area Z;

[0051] Figure 3 It is a front view of an embodiment of a valve body;

[0052] Figure 4 for Figure 3 Sectional view of the middle section AA;

[0053] Figure 5 for Figure 1 A partial enlarged view of the middle area Y;

[0054] Figure 6 A schematic diagram of the three-dimensional structure of an embodiment of a supporting housing at a first viewing angle;

[0055] Figure 7 for Figure 6 Schematic diagram of the three-dimensional structure from the second perspective.

[0057] 1. Valve body;

[0058] 11. Valve body; 111. Medium inlet; 112. Valve cavity; 113. Medium outlet;

[0059] 12. Valve core;

[0060] 13. Avoidance joint assembly; 131. Avoidance joint; 1311. First position limiting part; 132. First sealing ring; 133. Sealing sleeve; 134. Second sealing ring; 135. Connector; 1351. Second position limiting part; 1361. Bolt; 1362. Bolt; 1363. Bolt;

[0061] 21. First base;

[0062] 22. Second base;

[0063] 23. Position adjustment mechanism; 231. Guide column; 232. Distance driving unit; 233. Lead screw; 234. Support seat; 2341. First swing arm; 2342. Second swing arm; 2343. Third swing arm; 2344. Fourth swing arm; 235. Rotation axis; 236. First positioning pin; 237. Second positioning pin; 238. Rotation angle detection unit; 239. Rotation driving unit;

[0064] 24. Support rod;

[0065] 25. Fixed plate;

[0066] 3. Filter element assembly; 31. Filter element; 32. First subshell; 33. Second subshell; 34. Fixing chamber;

[0067] 41. A first pressure detection unit; 42. A second pressure detection unit;

[0068] 5. Controller. DETAILED DESCRIPTION

[0069] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.

[0070] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0071] The present invention discloses a gate valve with filtering function, see Figures 1 to 7 , which includes:

[0072] Filter element assembly 3;

[0073] A valve body 1, in which a filter element assembly 3 is detachably installed to filter out impurities in the medium;

[0074] Filter element life detection device, including:

[0075] The first pressure detection unit 41 installed on the first side of the filter element assembly 3 is used to detect the pressure P on the first side of the filter element assembly 3. 1 ;

[0076] The second pressure detection unit 42 installed on the second side of the filter element assembly 3 is used to detect the pressure P on the second side of the filter element assembly 3. 2 ;

[0077] Filter element assembly replacement mechanism;

[0078] Controller 5, configured as follows: If |P 1 -P 2 |≥△P, send filter element replacement signal S to the filter element replacement mechanism 更换 , the filter element 31 replacement mechanism is based on the received S 更换 Replace the filter element assembly 3 installed in the valve body 1.

[0079] Detect the pressure difference on both sides of the filter element assembly 3 |P 1 -P 2 |, and then compared with the preset pressure value △P, as the number of particles trapped by the filter element assembly 3 increases, the permeability of the filter element assembly 3 decreases, and the pressure difference on both sides |P1 -P 2 | increases, so |P 1 -P 2 The size of | is a strict basis for replacing the filter element assembly 3. If |P 1 -P 2 |≥△P (preset value), it indicates that the permeability of the filter element assembly 3 has been reduced to the extent that it needs to be replaced, thereby automatically identifying the replacement timing of the filter element assembly 3.

[0080] When the replacement opportunity is identified, a filter element replacement signal S is sent to the filter element replacement mechanism. 更换 , the filter element 31 replacement mechanism is based on the received S 更换 Replace the filter element assembly 3 installed in the valve body 1, so as to automatically replace it and free up manpower

[0081] A structure of the valve body 1 includes a valve body 11 , a valve core 12 and a avoidance joint assembly 13 .

[0082] Continue to see Figure 4 The valve body 11 is formed with a medium inlet 111, a medium outlet 113 and a valve cavity 112 connected therebetween. The fluid medium (such as air, water or others) can flow along the direction of the medium inlet 111 → valve cavity 112 → medium outlet 113 under a certain pressure (the pressure is usually generated by a pump), thereby playing the role of conveying the fluid medium.

[0083] The valve core 12 can be installed in the valve cavity 112 in an openable and closable manner. The on-off and opening degree of the fluid can be adjusted by adjusting the size of the valve core 12 sealing the valve cavity 112. The valve core 12 can be a ball valve, a plate valve, etc. The embodiment of the present invention adopts a plate valve.

[0084] The avoidance joint assembly 13 includes an avoidance joint 131, which is detachably mounted on the medium inlet 111. When the avoidance joint 131 is removed, it can move in a direction away from the medium inlet 111 to provide an avoidance space for the filter element assembly 3 to enter. The filter element assembly 3 is installed between the avoidance joint 131 and the medium inlet 111, so that the filter element assembly 3 can be cleverly replaced.

[0085] The embodiment of the avoidance joint assembly 13 may further include an avoidance joint 131 sleeve, a first sealing ring 132, a sealing sleeve 133, a second sealing ring 134 and a connector 135 which are sequentially connected in a sliding and sealing manner. The avoidance joint 131 is sleeved in the sealing sleeve 133 and is sealed and slidably connected to the sealing sleeve 133 through the first sealing ring 132; the connector 135 is sleeved in the sealing sleeve 133 and is sealed and slidably connected to the sealing sleeve 133 through the second sealing ring 134. Thus, the avoidance joint 131 can slide along the sealing sleeve 133, and when sliding in the direction of the valve cavity 112 away from the valve cavity 112, the avoidance space for receiving the filter element assembly 3 is given up, thereby facilitating the replacement of the filter element assembly 3.

[0086] In order to prevent the sealing sleeve 133 from falling off when sliding between the avoidance joint 131 and the sealing sleeve 133 and the connector 135, a first stopper 1311 is formed on the outer side of the avoidance joint 131 to block the sliding position of the sealing sleeve 133, and a second stopper 1351 is formed on the outer side of the connector 135 to block the sliding position of the sealing sleeve 133. It is known to those skilled in the art that when the medium is normally conveyed, a locking device (such as bolts 1361, 1362, 1363, which are threadedly matched with the second component after passing through the threaded holes of the first component, and the first component can be any one of the avoidance joint 131, the sealing sleeve 133 and the connector 135) is provided to fix the sliding position of the avoidance joint 131 relative to the sealing sleeve 133 and the sliding position of the sealing sleeve 133 relative to the connector 135. This is a conventional setting, which is not the invention of this patent application, and its specific structure will not be illustrated one by one.

[0087] Continue to see Figure 1 , Figures 5 to 7 , one structure of the filter element assembly 3 is that it includes a filter element 31 and a supporting shell. The supporting shell includes a first subshell 32 and a second subshell 33, and the first subshell 32 and the second subshell 33 are both formed with a semi-circular clamping groove. After the first subshell 32 and the second subshell 33 are buckled with each other, the two clamping grooves form a circular clamping chamber 34 to install the filter element 31 (in the embodiment of the present invention, the filter element 31 is clamped inside the clamping chamber 34. For the sake of simplicity in drawing, the seal between the inner wall of the clamping chamber 34 and the filter element 31, such as an O-ring, is not drawn). The filter element 31 can be selected according to the type of medium actually transported and the type of impurities in the medium, such as a pre-filter for filtering particulate matter in water, which will not be listed one by one. The supporting shell adopts a split design to facilitate the installation and removal of the filter element 31. The filter element 31 is installed in the circular clamping chamber 34, which is firmly fixed and not easy to fall off.

[0088] In addition, an assembly relationship between the first sub-shell 32 and the second sub-shell 33 is that the first end of the first sub-shell 32 is rotatably connected to the first end of the second sub-shell 33, and the second end of the first sub-shell 32 is detachably connected to the second end of the second sub-shell 33 through a buckle, which facilitates the opening and closing of the support shell and facilitates the loading and removal of the filter element 31.

[0089] A specific structure of the filter element replacement mechanism, see Figure 1 , which includes:

[0090] Fixed plate 25;

[0091] A support rod 24, a first end of the support rod 24 is fixed to a fixing plate 25, the fixing plate 25 is fixed to an outer wall of the first sub-shell 32 or the second sub-shell 33, the number of the support rods 24 and the number of the filter element assemblies 3 are both multiple and one-to-one corresponding, and the multiple filter element assemblies 3 are evenly arranged around the rotating shaft 235;

[0092] A rotating shaft 235, to which the second end of the support rod 24 is fixed;

[0093] Position adjustment mechanism 23;

[0094] A first base 21;

[0095] The second base 22 is arranged at an adjustable distance relative to the first base 21 under the drive of the position adjustment mechanism 23;

[0096] The rotating shaft 235 is rotatably mounted on the first base 21 or the second base 22 under the driving of the position adjustment mechanism 23 .

[0097] When the controller 5 determines (the basis for the determination has been described in detail above and will not be repeated) that the filter element 31 needs to be replaced, the user first removes the bolt 1361 between the avoidance joint 131 and the valve body 11, and then rotates the bolt 1362 between the avoidance joint 131 and the sealing sleeve 133, and the bolt 1363 between the sealing sleeve 133 and the connector 135 to make the connector 135 retreat away from the valve chamber 112 to make room.

[0098] Continue to see Figure 1 Then, the second base 22 is driven to move relative to the first base 21 by the position adjustment mechanism 23, so as to adjust the height of the rotating shaft 235, so that the center of the filter element 31 can move to the center of the avoidance joint 131. It is applicable to various pipeline valves of different heights.

[0099] A specific form of the position adjustment mechanism 23 is shown in Figure 1 , which includes:

[0100] Distance driving unit 232;

[0101] The lead screw 233 is driven by the distance driving unit 232 to rotate so as to adjust the distance between the second base 22 and the first base 21;

[0102] The guide post 231 guides the movement of the second base 22 relative to the second base 22 .

[0103] It should also be noted that a support base 234 is fixed to the first base 21 and the second base 22 respectively, and the position adjustment mechanism 23 also includes four swing arms arranged in a rectangular shape (respectively, the first swing arm 2341, the second swing arm 2342, the third swing arm 2343 and the fourth swing arm 2344, the first swing arm 2341 and the rotating shaft 235 are penetrated by the first positioning pin 236 to be locked, and the second swing arm 2342 and the rotating shaft 235 are penetrated by the second positioning pin 237 to be locked), the first ends of the four swing arms are hinged to the support base 234, and the second ends of the four swing arms are hinged to the rotating shaft 235, wherein: the position adjustment mechanism 23 also includes positioning pins, which are respectively used to lock the rotation angle of the swing arm relative to the rotating shaft 235.

[0104] The position adjustment mechanism 23 also includes a rotation drive unit 239 (in fact, it can use various power sources, such as a motor, an internal combustion engine, to drive the rotation shaft 235 to rotate through a transmission mechanism such as a belt drive or a chain drive. Figure 1 The figure shows a motor and a belt drive. Since the motor needs to be relatively fixed with the transmission shaft 235, the housing of the motor is fixed to the first swing arm 2341) and the rotation angle detection unit 238 (various angle sensors such as Hall switches, encoders, etc. can be selected). The rotation drive unit 239 drives the rotation shaft 235 to rotate. The rotation angle detection unit 238 is used to detect the rotation angle of the rotation shaft 235. The number of filter element assemblies 3 is N. The controller 5 is also configured as follows: each time the filter element 31 is replaced, the rotation angle of the rotation shaft 235 is driven to be 360° / N. There are 8 filter element assemblies 3 shown in the figure, and the rotation angle of the rotation shaft 235 is 360° / 8=45° each time the filter element 31 is replaced.

[0105] The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention; therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the attached claims rather than the above description. Therefore, it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any figure marks in the claims should not be regarded as limiting the claims involved.

[0106] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A gate valve with filtering function, characterized in that: include: Filter element assembly; A valve body, in which the filter element assembly is detachably installed to filter out impurities in the medium; Filter element life detection device, including: A first pressure detection unit installed on the first side of the filter element assembly, used to detect the pressure P1 on the first side of the filter element assembly; A second pressure detection unit installed on the second side of the filter element assembly, used to detect the pressure P2 on the second side of the filter element assembly; Filter element assembly replacement mechanism; The controller is configured to: if |P1-P2|≥△P, send a filter element replacement signal S to the filter element replacement mechanism 更换 The filter element replacement mechanism is based on the received S 更换 Replace the filter element assembly installed in the valve body.

2. The gate valve with filtering function according to claim 1, characterized in that: The valve body comprises: A valve body is formed with a medium inlet, a medium outlet and a valve cavity communicating therebetween; A valve core is installed in the valve cavity in an openable and closable manner; The avoidance joint assembly comprises an avoidance joint, which is detachably mounted on the medium inlet and can move in a direction away from the medium inlet when the avoidance joint is removed to provide an avoidance space for the filter element assembly to enter. The filter element assembly is mounted between the avoidance joint and the medium inlet.

3. The gate valve with filtering function according to claim 1 or 2, characterized in that: The avoidance joint assembly also includes: a first sealing ring; A sealing sleeve, wherein the avoidance joint is sleeved in the sealing sleeve and is sealingly and slidably connected to the sealing sleeve via the first sealing ring; A second sealing ring; A connector, the connector is sleeved in the sealing sleeve and is sealingly and slidingly connected to the sealing sleeve via the second sealing ring.

4. The gate valve with filtering function according to claim 3, characterized in that: A first limiting portion for blocking the sliding position of the sealing sleeve is formed on the outer side of the avoidance joint, and a second limiting portion for blocking the sliding position of the sealing sleeve is formed on the outer side of the connecting head.

5. The gate valve with filtering function according to claim 3, characterized in that: The filter element assembly comprises: Filter element; The supporting shell includes a first subshell and a second subshell, wherein the first subshell and the second subshell are both formed with a semi-annular fixing groove, and when the first subshell and the second subshell are buckled together, the two fixing grooves form a circular fixing chamber for installing the filter element.

6. The gate valve with filtering function according to claim 5, characterized in that: The first end of the first partial shell is rotatably connected to the first end of the second partial shell, and the second end of the first partial shell is detachably connected to the second end of the second partial shell via a buckle.

7. The gate valve with filtering function according to claim 3, characterized in that: The filter element component replacement mechanism comprises: Fixed plate; A support rod, a first end of which is fixed to the fixing plate, the fixing plate is fixed to the outer wall of the first sub-shell or the second sub-shell, the number of the support rods and the number of the filter element assemblies are both multiple and one-to-one corresponding, and the multiple filter element assemblies are evenly arranged around the rotating shaft; A rotating shaft, the second end of the support rod being fixed to the rotating shaft; Position adjustment mechanism; First base; A second base is arranged at an adjustable distance relative to the first base under the drive of a position adjustment mechanism; The rotating shaft is rotatably mounted on the first base or the second base under the drive of the position adjustment mechanism.

8. The gate valve with filtering function according to claim 7, characterized in that: The position adjustment mechanism also includes: Distance drive unit; A lead screw, driven by the distance driving unit to rotate, so as to adjust the distance between the second base and the first base; The guide column guides the movement of the second base relative to the second base.

9. The gate valve with filtering function according to claim 8, characterized in that: A support base is fixed on each of the first base and the second base, and the position adjustment mechanism further includes four swing arms arranged in a rectangular shape, wherein the first ends of the four swing arms are hinged to the support base, and the second ends of the four swing arms are hinged to the rotating shaft, wherein: The position adjustment mechanism also includes positioning pins, which are respectively used to lock the rotation angle of the swing arm relative to the rotation axis.

10. The gate valve with filtering function according to claim 8, characterized in that: A support base is fixed on each of the first base and the second base, and the position adjustment mechanism further includes four swing arms arranged in a rectangular shape, wherein the first ends of the four swing arms are hinged to the support base, and the second ends of the four swing arms are hinged to the rotating shaft, wherein: The position adjustment mechanism also includes a rotation drive unit and a rotation angle detection unit. The rotation drive unit drives the rotating shaft to rotate. The rotation angle detection unit is used to detect the rotation angle of the rotating shaft. The number of the filter element assemblies is N. The controller is also configured to: each time the filter element is replaced, the angle of driving the rotating shaft to rotate is 360° / N.

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