Gate valve and gate valve control device

Abstract

The present invention provides a gate valve and a control device for the gate valve, wherein the gate valve of the present invention includes a valve body, a valve plate assembly, a filter cartridge, a guide column and a scraper. A flow channel running through both ends is provided in the valve body, and a cylindrical filter chamber is also provided in the valve body, the filter cartridge is adapted to be embedded in the filter chamber, the scraper is fixed in the filter chamber and located in the filter cartridge, so that the blade of the scraper contacts the inner wall of the filter cartridge, and the scraper is located on one side between the input port and the output port. When in use, the guide column is rotated to move the telescopic rod relative to the guide column to drive the gate plate to move relative to the sealing chamber in the valve body, thereby realizing the opening or closing of the gate valve, and in this process, the filter cartridge rotates accordingly to make the inner wall of the filter cartridge contact the scraper to scrape off the residue attached to the filter surface. It can be seen that the gate valve of the present invention can automatically scrape off the filtered residue from the filter surface when opening and closing, and because the scraper is located on one side of the filter cartridge, it will not affect the flow rate flowing through the gate valve per unit time.

Description

Technical Field

[0001] The invention relates to the field of gate plate structures, in particular to a gate valve and a gate valve control device. Background Art

[0002] A gate valve is a common pipeline control valve used to cut off or regulate the flow of a medium. It controls the flow of fluid by raising and lowering the valve plate or gate. The gate valve can only be fully opened or fully closed and cannot be regulated or throttled. When the valve plate or gate is fully raised, the fluid can flow freely; when the valve plate or gate is fully lowered, the fluid is cut off. Gate valves are usually used in situations where fluid flow needs to be cut off.

[0003] At the same time, in order to make the gate valve have a filtering function when the fluid passes through the gate valve, the prior art usually configures a layer of filter mesh inside the gate valve. Furthermore, in order to achieve self-cleaning of the filter mesh, a scraper is usually set on the surface of the filter mesh. The scraper can be moved relative to the filter mesh to scrape off the residue attached to the surface of the filter mesh, thereby cleaning the filter mesh. For example, a gate valve with a filtering function recorded in application number 202122252248.5 is provided with a rotatable scraper on the surface of the filter mesh to scrape off the residue on the surface of the filter mesh.

[0004] However, this type of gate valve with a scraper disposed on the surface will inevitably block the fluid from passing through the filter screen, resulting in a decrease in the flow rate passing through the gate valve per unit time. Summary of the invention

[0005] In view of the deficiencies of the above background technology, the present invention provides a gate valve and a control device for the gate valve.

[0006] The present invention adopts the following technical solution:

[0007] A gate valve and a control device for the gate valve, the gate valve comprising:

[0008] A valve body, wherein a flow channel is provided in the valve body and the two ends of the valve body are an input port and an output port respectively. A cylindrical filter cavity is also provided in the valve body, and the axis of the filter cavity is perpendicular to the axis of the flow channel. A sealing port and a filter port are also provided on the surface of the valve body, and both the sealing port and the filter port penetrate into the valve body, and the filter port corresponds to the filter cavity;

[0009] A valve plate assembly, the valve plate assembly comprising a telescopic rod and a gate plate, one end of the telescopic rod is connected to the gate plate, the gate plate is adapted to be embedded in the valve body from the sealing port, and the other end of the telescopic rod is fixed to a guide rod on the side surface;

[0010] A filter cartridge, the filter cartridge is adapted to be embedded in the filter cavity, two corresponding sides of the filter cartridge are respectively provided with a clearance opening and a filter surface, and the filter surface is distributed with a plurality of meshes;

[0011] A guide column, wherein a concave guide groove is arranged on the annular surface of the guide column, wherein the guide groove comprises a first slide groove, a second slide groove and a third slide groove, wherein the first slide groove and the second slide groove are arranged at the upper end and the lower end of both sides of the guide column respectively, and both ends of the first slide groove and both ends of the second slide groove are connected by the third slide groove, so that the first slide groove, the second slide groove and the third slide groove are connected;

[0012] A scraper, the scraper is fixed in the filter cavity and is located in the filter cartridge, so that the blade of the scraper contacts the inner wall of the filter cartridge, and the scraper is also located on one side between the input port and the output port;

[0013] The guide column passes through the filter port and is fixedly connected to the packaging surface of the filter cartridge, and the end of the guide rod extends into the guide groove, so that when the guide column rotates, the guide rod moves in the guide groove and drives the telescopic rod and the gate plate to move relative to the sealing port, and when the gate plate moves to leave between the input port and the output port, the filter cartridge rotates to the point where the yield port faces the input port.

[0014] In a possible implementation of the first aspect, a connecting port is further provided on the side of the valve body facing away from the filter port, and the connecting port is adapted to be screwed to a bottom cover, and the scraper is fixed to a connecting rod, and an end of the connecting rod is fixed to the bottom cover.

[0015] In a possible implementation of the first aspect, the valve plate assembly also includes a connecting plate and a support pad, one side of the connecting plate is fixedly connected to the telescopic rod, and the gate plates are arranged on both sides of the other side of the connecting plate, the two gate plates are hinged to the connecting plate, and a support pad is arranged between the two gate plates, and the support pad is elastic; a sealing cavity is arranged in the valve body at a position corresponding to the sealing port, the sealing cavity is connected to the flow channel, and sealing rings are embedded in the ports on both sides of the sealing cavity corresponding to the input port and the output port, and when the telescopic rod drives the valve plate assembly to move into the valve body, the two gate plates are embedded in the sealing cavity, and the elastic force of the support pad pushes the two gate plates toward the sealing rings on both sides of the sealing cavity.

[0016] In a possible implementation of the first aspect, an inclined guide slope is provided at one end where the gate plate and the connecting plate are hinged on an edge of a side facing away from the support pad, and rotatable guide rollers are provided on both sides of the valve body at the sealing port, one side of the two guide rollers is located within the projection range of the sealing cavity, and the two gate plates are located between the two guide rollers; when the telescopic rod drives the connecting plate to move into the valve body until the two gate plates are embedded in the sealing cavity, the guide slopes of the two gate plates are respectively located between the two guide rollers; when the telescopic rod drives the connecting plate to move out of the valve body until the two gate plates leave the sealing cavity, the ends of the two gate plates away from the guide slopes are located between the two guide rollers.

[0017] In a possible implementation of the first aspect, the valve body is also encapsulated and connected to an upper cover plate at the sealing port, a raised limiting portion is provided on a side of the upper cover plate facing the valve body, recessed receiving grooves are provided on both sides of the valve body in the sealing port, bosses are provided at both ends of the receiving groove, and a notch is provided on the side of the boss facing the sealing port; rotating shafts are provided at both ends of the guide roller, and the rotating shafts at both ends of the guide roller are respectively embedded in the notches at both ends of the receiving groove, and after the upper cover plate covers the sealing port, each of the limiting portions respectively blocks the side of the notch close to the sealing port, so that the rotating shaft is restricted in the notch.

[0018] In a possible implementation of the first aspect, the guide roller includes a roller body, a bearing and a connecting shaft, the bearing is embedded and fixed in the roller body, the connecting shaft passes through the inner ring of the bearing, and the parts extending out of the guide roller at both ends of the connecting shaft are the rotating shaft.

[0019] In a possible implementation of the first aspect, the valve body fixes a limiting shell at the position of the sealing port, an accommodating space is formed inside the limiting shell, the connecting plate is adapted to be embedded in the accommodating space, and the connecting plate moves in the accommodating space as the telescopic rod moves.

[0020] A control device for the above-mentioned gate valve, the device includes a protective cover, a drive motor, a first gear and a second gear, the protective cover covers the telescopic rod and the guide column, the drive motor is fixed in the protective cover, the first gear is fixed to the output shaft of the drive motor, the second gear is fixed to the outside of the guide column, and the first gear and the second gear are meshed, so that the drive motor drives the guide column to rotate through the transmission of the first gear and the second gear.

[0021] In a possible implementation of the second aspect, the control device also includes a control module, a first sensing unit and a second sensing unit, the first sensing unit and the second sensing unit are both fixed to the protective cover, and the first sensing unit and the first slide are at the same water surface, and the second sensing unit and the second slide are at the same plane; when the drive motor drives the guide column to rotate to move the telescopic rod, when the guide rod moves to trigger the first sensing unit or the second sensing unit, the control module controls the drive motor to pause after receiving the signal from the first sensing unit or the second sensing unit.

[0022] In a possible implementation of the second aspect, the end of the protective cover facing away from the valve body is an opening, and the top cover is encapsulated at the opening. A raised limiting ring is fixed to the end face inside the top cover. When the top cover is fixed to the protective cover and covers the opening of the protective cover, the limiting ring is sleeved on the outside of the end of the guide column facing away from the filter cartridge.

[0023] From the above description of the structure of the present invention, it can be seen that compared with the prior art, the present invention has the following advantages: the present invention controls the guide column to rotate forward or reverse through a control device, so that the end of the guide rod fixed to the telescopic rod moves along the guide groove of the annular surface of the guide column, so that the telescopic rod drives the connecting plate and the gate plate to move relative to the sealing cavity in the valve body, thereby realizing the opening or closing of the gate valve. During this process, the filter cartridge rotates accordingly, so that the inner wall of the filter cartridge contacts the scraper, thereby scraping off the residue attached to the filter surface of the filter cartridge. That is, the gate valve of the present invention can automatically scrape off the filtered residue from the filter surface of the filter cartridge during the process of opening and closing, and because the scraper is located on one side of the filter cartridge, it does not affect the flow of the fluid from the yield port to the position passing through the filter surface, and therefore does not affect the flow rate flowing through the gate valve per unit time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0025] Figure 2 It is a schematic diagram of the lateral cross-sectional structure of the present invention after the gate plate moves into the sealing chamber.

[0026] Figure 3 for Figure 2 Schematic diagram of the cross section along the AA direction.

[0027] Figure 4 for Figure 2 Schematic diagram of the enlarged view at B.

[0028] Figure 5 for Figure 2 Enlarged schematic diagram at C in the middle.

[0029] Figure 6It is a schematic side cross-sectional view of the valve body from a three-dimensional perspective.

[0030] Figure 7 It is a schematic diagram of the three-dimensional structure of the valve body.

[0031] Figure 8 It is a schematic diagram of the three-dimensional structure of the scraper fixed on the bottom cover.

[0032] Fig. 9 This is a schematic diagram of the three-dimensional structure from a side perspective after the guide column fixes the filter cartridge.

[0033] Fig.10 Fix the filter cartridge to the guide column. Fig. 9 A schematic diagram of the three-dimensional structure from the other side perspective.

[0034] Fig.11 It is a schematic diagram of the three-dimensional structure of the valve plate assembly.

[0035] Fig.12 It is a three-dimensional cross-sectional schematic diagram of the present invention after the gate plate moves into the sealing chamber.

[0036] Fig.13 for Fig.12 Schematic diagram of the enlarged view at D in the middle.

[0037] Fig.14 This is a schematic diagram of the protective cover when viewed from above.

[0038] Fig.15 It is a schematic diagram of the three-dimensional structure of the present invention after the protective cover is hidden.

[0039] Fig.16 It is a three-dimensional cross-sectional schematic diagram of the present invention after the gate moves to leave the sealing chamber.

[0040] Fig.17 for Fig.16 Enlarged schematic diagram at E in the middle. DETAILED DESCRIPTION

[0041] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings.

[0042] In the following, the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features.

[0043] In addition, in the present application, directional terms such as "upper" and "lower" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they may change accordingly according to the changes in the orientation of the components in the drawings.

[0044] The present invention provides a gate valve, as shown in the attached Figures 1 to 3 As shown in FIG. 1 , the gate valve comprises a valve body 1, a valve plate assembly, a filter cartridge 3, a guide column 4 and a scraper 5. Figure 6 and 7 , a flow channel 101 is provided in the valve body 1 and runs through both ends, and the two ends of the valve body 1 are respectively an input port 102 and an output port 103, that is, the fluid enters from the input port 102 and flows out from the output port 103. A sealing cavity 104 and a filter cavity 105 are also provided in the valve body 1, and both the sealing cavity 104 and the filter cavity 105 are communicated with the flow channel 101, and the filter cavity 105 is a cylinder, and the axis of the filter cavity 105 is perpendicular to the axis of the flow channel 101. A sealing port 106 and a filter port 107 are also provided on the surface of one side of the valve body 1, and both the sealing port 106 and the filter port 107 run through the valve body 1, and the sealing port 106 corresponds to the sealing cavity 104, and the filter port 107 corresponds to the filter cavity 105.

[0045] As attached Fig. 9 and 10 As shown, the filter cartridge 3 is a cylindrical structure, and specifically one end of the filter cartridge 3 is open, and the other end is a closed packaging surface 31. The filter cartridge 3 can be inserted into the filter cavity 105 from the filter port 107, and the filter cartridge 3 is in the filter cavity 105, so that the filter cartridge 3 is restricted to rotate in the filter cavity 105. The two corresponding sides of the filter cartridge 3 are respectively provided with a clearance port 301 and a filter surface 32, and the filter surface 32 is distributed with a plurality of meshes for filtering out the particle residues in the fluid. Specifically, the filter cartridge 3 can be rotated to the point where the clearance port 301 faces the input port 102 of the valve body 1, so that the fluid enters the flow channel 101, passes through the clearance port 301, and then passes through the filter surface 32 before flowing out from the output port 103. In the process, the filter surface 32 blocks the particle residues at one end of the flow channel 101, that is, in the filter cavity 105. Furthermore, a connection port 108 is also provided on the side of the valve body 1 facing away from the filter port 107, so that the opening of the filter cartridge 3 corresponds to the connection port 108. The valve body 1 is also adapted to be screwed with the bottom cover 11 at the connection port 108, and the particle residues blocked by the filter surface 32 are accumulated in the filter cartridge 3. When the fluid source connected to the input port 102 of the valve body 1 is closed to stop the fluid delivery, the bottom cover 11 can be screwed off to remove the particle residues.

[0046] As attached Figure 3 and 8As shown, the scraper 5 is fixed in the filter cavity 105 and is located in the filter cartridge 3, and is located on one side between the clearance port 301 and the filter surface 32, that is, avoiding the position where the fluid flows from the clearance port 301 to the filter surface 32, and the blade of the scraper 5 is also close to the inner wall of the filter cartridge 3. Specifically, the scraper 5 is fixed on a connecting rod 51, and the end of the connecting rod 51 is fixed to the bottom cover 11, which can be fixed by welding. After adopting the structure of the secondary scraper 5, when the filter cartridge 3 rotates, the filter cartridge 3 rotates relative to the scraper 5 so that the scraper 5 can scrape off the residue attached to the inner surface of the filter cartridge 3, so that the residue falls from the surface inside the filter cartridge 3 into the filter cavity 105.

[0047] As attached Figure 4 , 5 As shown in FIG. 11 , the valve plate assembly includes a connecting plate 21, a telescopic rod 22, a gate plate 23 and a support pad 24. One side of the connecting plate 21 is fixedly connected to the telescopic rod 22. Fig.10 The valve body 1 is fixed with a limit housing 12 at the position of the sealing opening 106. A telescopic hole is provided on the side of the limit housing 12 facing away from the valve body 1. An accommodating space is formed inside the limit housing 12. The connecting plate 21 is adapted to be embedded in the accommodating space and can only move linearly relative to the valve body 1. The telescopic rod 22 extends from the telescopic hole. A guide rod 221 is fixed to the side of one end of the telescopic rod 22 outside the limit housing 12. By pulling the guide rod 221 to drive the telescopic rod 22 to move, the connecting plate 21 can move in the accommodating space along with the movement of the telescopic rod 22. Preferably, an oil seal can be embedded in the telescopic hole to seal the gap between the telescopic hole and the telescopic rod 22.

[0048] Continue to refer to the attached Figure 4 and 11 , gate plates 23 are provided on both sides of the other side of the connecting plate 21, and the two gate plates 23 are hinged to the connecting plate 21, so that the two gate plates 23 can swing relative to the connecting plate 21, and form a structure in which one end of the telescopic rod 22 is connected to the gate plate 23. The two gate plates 23 are adapted to be embedded in the sealing cavity 104 of the valve body 1 from the sealing port 106, and an elastic support pad 24 is provided between the two gate plates 23, and the support pad 24 is preferably a rubber pad. Furthermore, a groove is provided on one side of the gate plate 23 facing the middle of the connecting plate 21, and the two sides of the support pad 24 are respectively embedded in the grooves of the two gate plates 23, thereby forming a limit for the support pad 24. Refer to the attached Figure 5 , both sides of the sealed cavity 104 corresponding to the input port 102 and the output port 103 are embedded with sealing rings 13. When the telescopic rod 22 drives the connecting plate 21 to move into the valve body 1, the two gate plates 23 are embedded into the sealed cavity 104, and the elastic force of the support pad 24 pushes the two gate plates 23 against the sealing rings 13 on both sides of the sealed cavity 104, so that the two gate plates 23 seal both sides of the sealed cavity 104, thereby achieving that the gate plates 23 completely block the input port 102 and the output port 103 of the valve body 1.

[0049] An inclined guide slope 231 is provided at one end of the hinged connection between the gate plate 23 and the connecting plate 21 on the side edge facing away from the support pad 24. Rotatable guide rollers 6 are provided on both sides of the valve body 1 at the sealing port 106, and one side of the two guide rollers 6 is located within the projection range of the sealing cavity 104. The structure of the guide roller 6 may include a roller body, a bearing and a connecting shaft, and the bearings are embedded and fixed at both ends of the roller body, and the connecting shaft passes through the inner ring of the bearing, so that the parts of the two ends of the connecting shaft extending outside the guide roller 6 form a rotating shaft. In this structure, the roller body can rotate relative to the rotating shaft through the connection of the bearing.

[0050] Furthermore, as attached Fig.14 As shown, the valve body 1 is also sealed and connected to the upper cover plate 71 at the sealing port 106, and a raised limiting portion 74 is provided on the upper cover plate 71 facing the valve body 1. Figure 6 and 7 , the valve body 1 is provided with recessed receiving grooves 109 on both sides of the sealing opening 106, and bosses 15 are provided on both sides of the receiving grooves 109, and a notch 1010 is provided on the side of the boss 15 facing the sealing opening 106. The rotating shafts at both ends of the guide roller 6 are respectively embedded in the notch 1010, so that one side of the roller body of the guide roller 6 is simultaneously embedded in the receiving groove 109 and rotates, so that the other side of the roller body is located within the projection range of the sealing cavity 104. When fixing the rotating shafts at both ends of the guide roller 6, after the upper cover plate 71 is covered and fixed to the sealing opening 106, each limiting part blocks the side of the notch 1010 close to the sealing opening 106, so that the rotating shaft is limited in the notch 1010, and a structure is formed in which the guide roller 6 is limited to rotate on the inner side wall of the sealing opening 106.

[0051] Continue to refer to the attached Figure 4 and 17, the two gate plates 23 are both located between the two guide rollers 6. When the support pad 24 pushes the two gate plates 23 outwards of the two sides of the connecting plate 21 by elastic force, the two guide rollers 6 can block the two gate plates 23 to limit the swing angle of the two gate plates 23 outwards of the two sides of the connecting plate 21. Specifically, when the telescopic rod 22 drives the connecting plate 21 to move into the valve body 1 until the two gate plates 23 are embedded in the sealing cavity 104, the two gate plates 23 move to the guide inclined surfaces 231 respectively located between the two guide rollers 6, so that the elastic force of the support pad 24 can push the two gate plates 23 open until they are pressed against the sealing rings 13 on both sides of the sealing cavity 104 to close the gate valve. When the telescopic rod 22 drives the connecting plate 21 to move out of the valve body 1, the guiding slopes 231 of the two gate plates 23 move out of the valve body 1 along the guiding rollers 6 until the two gate plates 23 leave the sealing chamber 104, and the ends of the two gate plates 23 away from the guiding slopes 231 are located between the two guiding rollers 6, so that the two sides of the sealing chamber 104 are opened and the gate valve is opened. In this process, the two gate plates 23 are gradually squeezed by the two guiding rollers 6 and swing toward the middle of the connecting plate 21, thereby reducing the distance between the two gate plates 23 and avoiding friction between the gate plates 23 and the sealing ring 13 during the movement process, thereby affecting the service life of the sealing ring 13. It is worth mentioning that the structure of the guiding roller 6 can reduce the friction of the gate plate 23 relative to the sealing chamber 104 during the telescopic movement, which is conducive to improving the service life of the gate valve.

[0052] As attached Figure 5 As shown, a protruding cone 14 is fixed at the center of the bottom surface of the sealing opening 106 in the sealing cavity 104 in the valve body 1, and the end of the cone 14 is a conical inclined surface. When the telescopic rod 22 drives the connecting plate 21 to move into the valve body 1 until the two gates 23 are embedded in the sealing cavity 104, the two gates 23 are inserted between the conical inclined surface of the cone 14 and the side of the sealing cavity 104, and the conical inclined surface of the cone 14 pushes the sealing ring 13 on the side of the sealing cavity 104, further improving the airtightness of the gate 23 sealing the side of the sealing cavity 104.

[0053] As attached Fig. 9 and 10As shown, the annular surface of the guide column 4 is provided with a concave guide groove 41, and the guide groove 41 includes a first slide groove 401, a second slide groove 402 and a third slide groove 403. The first slide groove 401 and the second slide groove 402 are provided at the upper end and the lower end of both sides of the guide column 4, respectively, that is, the plane where the first slide groove 401 is located and the plane where the second slide groove 402 is located have a certain distance, and the distance is the moving distance required for the gate plate 23 to leave the sealing chamber 104. Both ends of the first slide groove 401 and both ends of the second slide groove 402 are connected by the third slide groove 403, that is, the third slide groove 403 is provided on both sides of the guide column 4, and the first slide groove 401, the second slide groove 402 and the third slide groove 403 are connected to form an integral structure of the guide groove 41. The end of the guide column 4 away from the guide groove 41 is also fixedly connected to the filter cartridge 3. The connection method can be direct welding fixation, or it can be a bolt inserted from the inside of the filter cartridge 3 to the outside, so that the stud of the bolt passes through the packaging surface 31 of the filter cartridge 3 and is bolted to the guide column 4, until the stud of the bolt is tightened on the guide column 4, so that the guide column 4 and the filter cartridge 3 form a fixed whole, and the outer diameter of the guide column 4 is smaller than the outer diameter of the filter cartridge 3.

[0054] As attached Fig.14 and 16 As shown, the valve body 1 also packages the upper cover plate 71 at the filter port 107, and the upper cover plate 71 has a limiting hole 701, the aperture of which is larger than the aperture of the guide column 4 and smaller than the aperture of the filter cartridge 3. After the upper cover plate 71 is fixed outside the filter port 107, the limiting hole 701 and the filter port 107 are coaxially corresponding. Specifically, when assembling the integral body formed by the guide column 4 and the filter cartridge 3, the filter cartridge 3 can be first inserted into the filter cavity 105 from the filter port 107, and then the upper cover plate 71 can be packaged outside the filter port 107 by screwing, so as to limit the filter cartridge 3 to rotate in the filter cavity 105, and also limit the guide column 4 to rotate only relative to the valve body 1. This assembly structure is equivalent to the guide column 4 passing through the filter port 107 and the packaging surface 31 of the filter cartridge 3 to be fixedly connected. Preferably, an oil seal can be embedded in the filter port 107 to seal the gap between the guide column 4 and the filter port 107.

[0055] As attached Fig.12 and 16As shown, the end of the guide rod 221 extends into the guide groove 41, so that when the guide column 4 rotates to drive the filter cartridge 3 to rotate, the guide rod 221 moves in the guide groove 41 and drives the telescopic rod 22 and the gate plate 23 to move relative to the sealing port 106, and when the gate plate 23 moves to leave between the input port 102 and the output port 103, the filter cartridge 3 rotates to the clearance port 301 close to the input port 102. Specifically, when the guide column 4 rotates to make the end of the guide rod 221 slide from the first slide groove 401 through one of the third slide grooves 403 to the second slide groove 402, the guide rod 221 gradually moves into the valve body 1 along the third slide groove 403, and moves to the two gates of the valve plate assembly located in the sealing chamber 104, so that the elastic force of the support pad 24 can push the two gates 23 open to the sealing rings 13 on both sides of the sealing chamber 104 respectively to achieve the closure of the gate valve. Then continue to rotate 180° to make the end of the guide rod 221 slide from the second slide groove 402 through another third slide groove 403 to the first slide groove 401. During this process, the guide rod 221 gradually moves along the third slide groove 403 toward the outside of the valve body 1, and moves until the two gate plates 23 of the valve plate assembly leave the sealing cavity 104, thereby realizing the opening of the gate valve.

[0056] It can be known from the above description that when the gate valve of the present invention is used, the gate valve can be opened or closed by rotating the guide column 4 to move the telescopic rod 22 relative to the guide column 4 and drive the gate plate 23 to move relative to the sealing cavity 104 in the valve body 1, and in this process, the filter cartridge 3 rotates accordingly to make the inner wall of the filter cartridge 3 contact the scraper 5, thereby scraping off the residue attached to the surface of the filter surface 32 of the filter cartridge 3. In other words, the gate valve of the present invention can automatically scrape off the filtered residue from the filter surface 32 during the opening and closing process, and because the scraper 5 is located on one side of the filter cartridge 3, it does not affect the flow of the fluid from the yield port 301 to the position passing through the filter surface 32, thereby avoiding affecting the flow rate of the fluid per unit time in the gate valve.

[0057] The present invention also discloses a control device for the gate valve, as shown in the attached Fig.12 , 15As shown in Figures 16 and 17, the device includes a protective cover 7, a driving motor 81, a first gear 82 and a second gear 83, a control module, a first sensing unit 91 and a second sensing unit 92. Among them, one end of the protective cover 7 is an opening, and the other end of the protective cover 7 can be the upper cover plate 71 of the above-mentioned encapsulated filter port 107, and the upper cover plate 71 can extend to the sealing port 106, and the upper cover plate 71 can also be provided with a through hole at the sealing port 106. Preferably, a sealing gasket is provided between the upper cover plate 71 and the sealing port 106 of the valve body 1 and the filter port 107, so that the gap between the upper cover plate 71 and the valve body 1 is sealed. After the protective cover 7 is fixed to the valve body 1, the end of the protective cover 7 facing away from the valve body 1 is an opening, and the limit shell 12 can be put into the protective cover 7 from the opening of the protective cover 7, and then the upper cover plate 71 of the protective cover 7 and the flange of the limit shell 12 and the flange of the valve body 1 at the sealing port 106 are connected and fixed by inserting bolts and then connecting nuts, so that the protective cover 7 is fixed to the valve body 1, and the limit shell 12, the telescopic rod 22 and the guide column 4 are all located in the protective cover 7, so that the protective cover 7 covers the telescopic rod 22 and the guide column 4. Furthermore, the protective cover 7 also covers the top cover 72 at the opening, and the top cover 72 can be fixed by inserting screws from the outside into the protective cover 7, so that the telescopic rod 22, the guide column 4 and other components of the control device are all sealed in the protective cover 7.

[0058] Continue to refer to the attached Fig.16 A raised limiting ring 73 is fixed on the end surface of the top cover 72. When the top cover 72 is fixed to the protective cover 7 and covers the opening of the protective cover 7, the limiting ring 73 is sleeved on the end of the guide column 4 facing away from the filter cartridge 3, thereby forming a further restriction on the guide column 4 to prevent the guide column 4 from tilting and affecting the movement of the guide rod 221.

[0059] Please refer to the attached Fig.12 and 13 The driving motor 81 is fixed in the protective cover 7, and can be fixed on the outer wall of the limiting shell 12. The first gear 82 is fixed to the output shaft of the driving motor 81, and the second gear 83 is fixed to the outside of the guide column 4, and the first gear 82 and the second gear 83 are meshed. The driving motor 81 drives the guide column 4 to rotate through the transmission of the first gear 82 and the second gear 83, so as to realize the automatic rotation of the guide column 4, which is convenient for realizing automatic control.

[0060] In addition, the first sensing unit 91 and the second sensing unit 92 are both fixed in the protective cover 7, and the first sensing unit 91 and the first chute 401 are at the same water surface, and the second sensing unit 92 and the second chute 402 are at the same plane. Preferably, the first sensing unit 91 and the second sensing unit 92 can both be travel switches. When the driving motor 81 drives the guide column 4 to rotate to move the telescopic rod 22, when the guide rod 221 moves to the contact that triggers the first sensing unit 91 or the second sensing unit 92, the driving motor 81 is paused. Preferably, the subsequent rotation direction of the driving motor 81 is opposite to the previous rotation direction, that is, when the control module sends a signal to make the driving motor 81 drive the guide column 4 to rotate forward, the guide rod 221 is driven to move in the direction of the valve body 1, and when it moves to trigger the second sensing unit 92, the two gate plates 23 of the valve plate assembly are embedded in the sealing cavity 104 to close the gate valve; when the control module sends a signal to make the driving motor 81 drive the guide column 4 to reverse, the guide rod 221 is driven to move in the direction of the valve body 1, and when it moves to trigger the first sensing unit 91, the two gate plates 23 of the valve plate assembly leave the sealing cavity 104 to open the gate valve. It can be seen that the control device of the present invention can realize the control of the opening or closing of the gate valve by controlling the forward or reverse rotation of the guide column 4, which is more convenient.

[0061] The above is only a specific implementation of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A gate valve, characterized in that: The gate valve includes: A valve body, wherein a flow channel is provided in the valve body and the two ends of the valve body are an input port and an output port respectively. A cylindrical filter cavity is also provided in the valve body, and the axis of the filter cavity is perpendicular to the axis of the flow channel. A sealing port and a filter port are also provided on the surface of the valve body, and both the sealing port and the filter port penetrate into the valve body, and the filter port corresponds to the filter cavity; A valve plate assembly, the valve plate assembly comprising a telescopic rod and a gate plate, one end of the telescopic rod is connected to the gate plate, the gate plate is adapted to be embedded in the valve body from the sealing port, and the other end of the telescopic rod is fixed to a guide rod on the side surface; A filter cartridge, the filter cartridge is adapted to be embedded in the filter cavity, two corresponding sides of the filter cartridge are respectively provided with a clearance opening and a filter surface, and the filter surface is distributed with a plurality of meshes; A guide column, wherein a concave guide groove is arranged on the annular surface of the guide column, wherein the guide groove comprises a first slide groove, a second slide groove and a third slide groove, wherein the first slide groove and the second slide groove are arranged at the upper end and the lower end of both sides of the guide column respectively, and both ends of the first slide groove and both ends of the second slide groove are connected by the third slide groove, so that the first slide groove, the second slide groove and the third slide groove are connected; A scraper, the scraper is fixed in the filter cavity and is located in the filter cartridge, so that the blade of the scraper contacts the inner wall of the filter cartridge, and the scraper is also located on one side between the input port and the output port; The guide column passes through the filter port and is fixedly connected to the packaging surface of the filter cartridge, and the end of the guide rod extends into the guide groove, so that when the guide column rotates, the guide rod moves in the guide groove and drives the telescopic rod and the gate plate to move relative to the sealing port, and when the gate plate moves to leave between the input port and the output port, the filter cartridge rotates to the point where the yield port faces the input port.

2. The gate valve according to claim 1, characterized in that: A connection port is also provided on the side of the valve body facing away from the filter port, and the connection port is adapted to be screw-connected to the bottom cover. The scraper is fixed to a connecting rod, and the end of the connecting rod is fixed to the bottom cover.

3. The gate valve according to claim 1, characterized in that: The valve plate assembly also includes a connecting plate and a support pad, one side of the connecting plate is fixedly connected to the telescopic rod, and the gate plates are arranged on both sides of the other side of the connecting plate, the two gate plates are hinged to the connecting plate, and a support pad is arranged between the two gate plates, and the support pad is elastic; a sealing cavity is arranged in the valve body at a position corresponding to the sealing port, the sealing cavity is connected to the flow channel, and sealing rings are embedded in the ports on both sides of the sealing cavity corresponding to the input port and the output port, when the telescopic rod drives the valve plate assembly to move into the valve body, the two gate plates are embedded in the sealing cavity, and the elastic force of the support pad pushes the two gate plates against the sealing rings on both sides of the sealing cavity respectively.

4. The gate valve according to claim 3, characterized in that: An inclined guide surface is provided at one end where the gate plate and the connecting plate are hinged, at an edge on the side facing away from the support pad, and rotatable guide rollers are provided on both sides of the valve body at the sealing port, one side of the two guide rollers is located within the projection range of the sealing cavity, and the two gate plates are located between the two guide rollers; when the telescopic rod drives the connecting plate to move into the valve body until the two gate plates are embedded in the sealing cavity, the guide slopes of the two gate plates are respectively located between the two guide rollers; when the telescopic rod drives the connecting plate to move out of the valve body until the two gate plates leave the sealing cavity, the ends of the two gate plates away from the guide slopes are located between the two guide rollers.

5. The gate valve according to claim 4, characterized in that: The valve body is also encapsulated and connected to an upper cover plate at the sealing port, a raised limiting portion is provided on a side of the upper cover plate facing the valve body, recessed receiving grooves are provided on both sides of the valve body in the sealing port, bosses are provided at both ends of the receiving groove, and a notch is provided on the side of the boss facing the sealing port; rotating shafts are provided at both ends of the guide roller, and the rotating shafts at both ends of the guide roller are respectively embedded in the notches at both ends of the receiving groove, after the upper cover plate covers the sealing port, each of the limiting portions respectively blocks a side of the notch close to the sealing port, so that the rotating shaft is restricted in the notch.

6. The gate valve according to claim 5, characterized in that The guide roller comprises a roller body, a bearing and a connecting shaft. The bearing is embedded and fixed in the roller body, the connecting shaft passes through the inner ring of the bearing, and the parts extending out of the guide roller at both ends of the connecting shaft are the rotating shaft.

7. The gate valve according to any one of claims 3 to 6, characterized in that: The valve body fixes a limiting shell at the position of the sealing port, an accommodating space is formed inside the limiting shell, the connecting plate is adapted to be embedded in the accommodating space, and the connecting plate moves in the accommodating space as the telescopic rod moves.

8. A gate valve control device according to any one of claims 1 to 7, characterized in that: The device includes a protective cover, a driving motor, a first gear and a second gear, wherein the protective cover covers the telescopic rod and the guide column, the driving motor is fixed in the protective cover, the first gear is fixed to the output shaft of the driving motor, the second gear is fixed to the outside of the guide column, and the first gear and the second gear are meshed, so that the driving motor drives the guide column to rotate through the transmission of the first gear and the second gear.

9. A control device as claimed in claim 8, characterized in that: The control device also includes a control module, a first sensing unit and a second sensing unit, wherein the first sensing unit and the second sensing unit are both fixed inside the protective cover, and the first sensing unit and the first slide slot are at the same water surface, and the second sensing unit and the second slide slot are at the same plane; when the driving motor drives the guide column to rotate to move the telescopic rod, when the guide rod moves to trigger the first sensing unit or the second sensing unit, the control module controls the driving motor to pause after receiving the signal of the first sensing unit or the second sensing unit.

10. A control device according to claim 8, characterized in that: The end of the protective cover facing away from the valve body is an opening, and the top cover is encapsulated at the opening. A raised limiting ring is fixed to the end surface inside the top cover. When the top cover is fixed to the protective cover and covers the opening of the protective cover, the limiting ring is sleeved on the outside of the end of the guide column facing away from the filter cartridge.

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