A bidirectional gate valve with high sealing performance

Abstract

The present invention discloses a high-sealing bidirectional gate valve, which relates to the field of valve technology. Due to the fluctuation of liquid, the valve is subjected to different pressures. In the process of pressure fluctuation, the valve cannot change with the fluctuating pressure, resulting in leakage of liquid in the valve. Therefore, the top block is matched with the arc surface of the opposite surface of the slide plate. When it is necessary to completely close the internal flow path of the valve body, the slide plate is contacted with the liquid in the pipelines on both sides. When the pressure in the pipeline increases, the pressure is used to push the sliding plate to slide, so that the connecting arm drives the top block to expand outward, so that the pressure ring squeezes the rubber ring outward, and the rubber ring is pressed at the edge gap of the seal to fit the pressure, which is adjusted with the fluctuation of water pressure. After the water pressure suddenly increases, the sealing fitting pressure of the seal cannot be adjusted with the water pressure, resulting in leakage of the gate valve.

Description

Technical Field

[0001] The invention relates to the technical field of valves, in particular to a bidirectional gate valve with high sealing performance. Background Art

[0002] At present, the gate valve is a type of valve, which is mainly used to control the flow of fluid in the pipeline. When the gate valve is in the open state, the gate rises, and the fluid can flow freely in the valve body channel. When the gate valve needs to be closed, the operating mechanism makes the gate drop, and the gate is in close contact with the valve seat to form a seal to prevent the fluid from passing. The two-way gate valve is a gate valve with a two-way sealing function. The sealing principle of the two-way gate valve is achieved through the sealing surface between the gate and the valve body. When the valve is closed, the sealing surface of the gate fits tightly with the sealing surface of the valve body to form a seal. Since there are sealing surfaces on both sides of the gate, the two-way gate valve can achieve sealing in two directions;

[0003] Since the valve needs to be connected to the pipeline during use, when there is liquid in the pipeline, the valve will be subjected to different pressures due to the fluctuation of the liquid. During the pressure fluctuation, the valve cannot change with the fluctuating pressure, resulting in liquid leakage in the valve. Summary of the invention

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a high sealing performance two-way gate valve, comprising:

[0005] A valve body, which is used to be connected to a pipeline and has a flow pipeline inside, and a valve cover is fixedly installed on the top of the valve body by bolts;

[0006] A valve core, which is used to close the flow channel of the valve body and is installed at the center of the valve body;

[0007] A filter mechanism, which is used to filter the liquid flowing through, and the filter mechanism is symmetrically installed inside the valve body along the center position of the axis of the valve body;

[0008] A valve stem mechanism, which is used to control the position of the valve core and is fixedly mounted on the top of the valve cover;

[0009] Wherein, the valve core includes a gate plate, a connecting plate is fixedly installed on the top of the outer side of the gate plate, the gate plate is fixedly connected to the bottom of the valve stem mechanism through the connecting plate, and annular grooves are symmetrically opened on the outer side of the gate plate, and pressure rings are slidably installed at the annular grooves of the gate plate, and rubber rings are fixedly installed on the non-opposite surfaces of the pressure rings, and slide plates are fixedly installed on the opposite surfaces of the pressure rings, and the slide plates are evenly installed along the center of the circle of the pressure rings, and the outer side of the slide plate is slidably adapted to the inner wall of the gate plate, the opposite surfaces of the slide plates are inclined surfaces, and top blocks are slidably installed between the slide plates, through The top block cooperates with the arc surface of the opposite side of the slide plate. When the internal flow path of the valve body needs to be completely closed, the slide plate contacts the liquid in the pipes on both sides. When the pressure in the pipe increases, the pressure is used to push the sliding plate to slide, so that the connecting arm drives the top block to expand outward, and the pressure ring squeezes the rubber ring outward. The rubber ring is pressurized at the edge gap of the seal to fit the pressure, which is adjusted with the fluctuation of water pressure. After the water pressure suddenly increases, the sealing fitting pressure of the seal cannot be adjusted with the water pressure, resulting in leakage of the gate valve. The outer side of the top block slides and fits with the opposite side of the slide plate.

[0010] Preferably, a sliding column is slidably installed on the inner wall of the gate plate, and a ring is fixedly installed on one end of the outer side of the sliding column, the ring is located on the inner side of the gate plate, and connecting arms are rotatably installed on the opposite surfaces of the ring, and the connecting arm is rotatably installed on the end of the connecting arm away from the ring and the opposite surface of the top block, and a sliding disk is fixedly installed on the end of the sliding column away from the ring, and the closing position of the valve core is accurate when the gate valve is closed through the snap-fitting between the positioning block and the valve body groove, so that the valve core is prevented from wearing out after long-term use, resulting in tilting when closing, resulting in reduced closing effect, the outer side of the sliding disk is slidably adapted to the inner wall of the gate plate, and the sliding disk is located on the outer side of the ring, and a positioning block is fixedly installed on the bottom of the gate plate.

[0011] Preferably, the filter mechanism comprises a fixed cylinder, the outer side of the fixed cylinder is fixedly mounted on the inner wall of the valve body, and the fixed cylinder is located at the flow pipe of the valve body, the inner wall of the fixed cylinder is provided with an annular groove, and a slide groove cylinder is fixedly mounted on the annular groove of the fixed cylinder, the inner wall of the slide groove cylinder is evenly provided with strip grooves, a filter cover is mounted on the inner side of the slide groove cylinder, the outer side of the filter cover is evenly provided with blocks, and the filter cover is slidably adapted to the strip groove of the slide groove cylinder through the blocks, a support frame is fixedly mounted on the center position of the filter cover close to one side of the valve core, and the support frame is away from A connecting column is fixedly installed at one end of the filter cover, and an arc surface block is fixedly installed at the end of the connecting column away from the support frame. The arc surface block cooperates with the filter cover. During the filtration process, if blockage occurs after a long period of work or the liquid fluctuation in the pipeline increases after the gate valve is closed, the filter cover is impacted by the water flow, causing the filter cover to slide, pushing the arc surface block toward the sliding disk, pushing the sliding disk to slide, and cooperating with the valve core to improve the sealing effect. The side of the arc surface block away from the connecting column is a centrally raised arc surface, and the side of the arc surface block away from the connecting column is in contact with the outer side of the sliding disk.

[0012] Preferably, the valve stem mechanism includes a fixing frame and a sleeve, the fixing frame is fixedly installed at the center position of the top of the valve cover, the sleeve is fixedly installed at the bottom of the valve cover, a swivel is rotatably installed on the top of the fixing frame, a threaded rod is threadedly connected to the inner wall of the swivel, the bottom end of the threaded rod penetrates the valve cover and extends to the bottom, a connecting plate is rotatably installed on the bottom end of the threaded rod, the bottom of the connecting plate is fixedly connected to the top of the gate plate through a connecting plate, a top ring is fixedly installed on the top of the outer side of the sleeve, through the cooperation of the top ring and the bottom ring, after the circulation pipeline of the gate valve is fully opened to allow the liquid to flow, the top ring and the bottom ring squeeze the slip ring in the middle, and at the same time, under the pressure of squeezing, the top ring The ring and the bottom ring increase the fitting pressure with the inner wall of the valve body according to their own rubber deformation characteristics to avoid fluctuations in the liquid during the flow process and leakage of the valve body. A slip ring is slidably installed on the outer side of the sleeve, and the top ring is made of rubber material. A groove ring is fixedly installed on the top of the connecting plate, and a bottom ring is fixedly installed on the top of the outer side of the groove ring. The bottom ring is made of rubber material, and the outer side of the bottom ring is in contact with the inner wall of the valve body. An annular protrusion is provided at the bottom of the slip ring, and the annular protrusion of the slip ring is located directly above the bottom ring. The slip ring is located at the bottom of the top ring, and the top of the slip ring is tightly fitted with the bottom of the top ring, and the outer side of the top ring is fitted with the inner wall of the valve body.

[0013] The present invention provides a bidirectional gate valve with high sealing performance. It has the following beneficial effects:

[0014] 1. This high sealing performance two-way gate valve cooperates with the arc surface of the top block and the opposite side of the slide. When the internal flow path of the valve body needs to be completely closed, the slide is in contact with the liquid in the pipes on both sides. When the pressure in the pipe increases, the pressure is used to push the sliding plate to slide, so that the connecting arm drives the top block to expand outward, and the pressure ring squeezes the rubber ring outward. The rubber ring is pressurized at the edge gap of the seal to fit the pressure, which is adjusted with the fluctuation of the water pressure. After the water pressure suddenly increases, the sealing fitting pressure of the seal cannot be adjusted with the water pressure, resulting in leakage of the gate valve.

[0015] Second, the high sealing performance two-way gate valve can accurately close the valve core when the gate valve is closed through the snap-fitting between the positioning block and the groove of the valve body, thereby preventing the valve core from being worn out after long-term use, causing the gate valve to tilt when closed, resulting in reduced sealing effect.

[0016] 3. This high sealing performance two-way gate valve cooperates with the filter cover through the arc surface block. During the filtering process, if blockage occurs after working for a long time or the liquid fluctuation in the pipeline increases after the gate valve is closed, the filter cover will slide due to the impact of the water flow on the filter cover, pushing the arc surface block toward the sliding disc, pushing the sliding disc to slide and cooperate with the valve core to improve the sealing effect.

[0017] 4. This high sealing performance two-way gate valve, through the cooperation of the top ring and the bottom ring, after the flow pipeline of the gate valve is fully opened to allow the liquid to flow, the top ring and the bottom ring squeeze the slip ring in the middle. At the same time, under the pressure of squeezing, the top ring and the bottom ring increase the fitting pressure with the inner wall of the valve body according to their own rubber deformation characteristics, avoiding fluctuations in the liquid during the flow process and causing leakage in the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the external structure of a high sealing performance bidirectional gate valve of the present invention;

[0019] Figure 2 This is a structural dissection diagram of a high sealing performance bidirectional gate valve of the present invention;

[0020] Figure 3 It is a schematic diagram of the structure of the filtering mechanism of the present invention;

[0021] Figure 4 This is a structural dissection diagram of the filtering mechanism of the present invention;

[0022] Figure 5 This is a schematic diagram of the valve core structure of the present invention;

[0023] Figure 6 This is a dissected diagram of the valve core structure of the present invention;

[0024] Figure 7 It is a schematic diagram of the structure of the valve core part of the present invention;

[0025] Figure 8 This is a schematic diagram of the valve stem mechanism structure of the present invention;

[0026] Fig. 9 It is a partial structural dissection diagram of the valve stem mechanism of the present invention.

[0027] In the figure: 1. valve body; 2. valve core; 3. filter mechanism; 4. valve stem mechanism; 5. valve cover; 201. gate; 202. connecting plate; 203. rubber ring; 204. sliding plate; 205. positioning block; 206. pressure ring; 207. sliding plate; 208. connecting arm; 209. sleeve; 210. top block; 211. sliding column; 31. fixing cylinder; 32. filter cover; 33. slide groove cylinder; 34. support frame; 35. connecting column; 36. arc block; 41. fixing frame; 42. threaded rod; 43. swivel; 44. connecting plate; 45. bottom ring; 46. groove ring; 47. sleeve; 48. sliding ring; 49. top ring. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0029] The first embodiment, as Figure 1 to Figure 2 and Figures 5 to 7 As shown, the present invention provides a technical solution: a high sealing performance two-way gate valve, comprising:

[0030] A valve body 1, which is used to be connected to a pipeline and has a flow pipeline inside. A valve cover 5 is fixedly installed on the top of the valve body 1 by bolts;

[0031] A valve core 2, which is used to close the flow channel of the valve body 1, and the valve core 2 is installed at the center position inside the valve body 1;

[0032] A filter mechanism 3, which is used to filter the liquid flowing through, and the filter mechanism 3 is symmetrically installed inside the valve body 1 along the center position of the axis of the valve body 1;

[0033] A valve stem mechanism 4, which is used to control the position of the valve core 2, and the valve stem mechanism 4 is fixedly installed on the top of the valve cover 5;

[0034] Wherein, the valve core 2 includes a gate plate 201, a connecting plate 202 is fixedly installed on the top of the outer side of the gate plate 201, the gate plate 201 is fixedly connected to the bottom of the valve stem mechanism 4 through the connecting plate 202, and annular grooves are symmetrically opened on the outer side of the gate plate 201, and pressure rings 206 are slidably installed at the annular grooves of the gate plate 201, and rubber rings 203 are fixedly installed on the non-opposite surfaces of the pressure rings 206, and slide plates 207 are fixedly installed on the opposite surfaces of the pressure rings 206. The slide plates 207 are evenly installed along the center position of the circle of the pressure ring 206. In the process of closing, the rubber ring 203 contacts the edge of the filter mechanism 3, and the rubber ring 203 is used to seal the fitting part of the filter mechanism 3 and the valve core 2. When the hydraulic pressure on one side increases, the hydraulic pressure pushes the slide plate 204 to drive the slide column 211 to the gate through the contact between the liquid and the slide plate 204. The center position of the inner side of the plate 201 moves, and in the process of moving, the sleeve ring 209 is driven to approach each other. At the same time, in the process of approaching, the top block 210 is driven to move outward through the connecting arm 208. In the process of the top block 210 moving outward, the arc surface of the top block 210 and the opposite surface of the slide plate 207 are used to slide and adapt, so that the slide plate 207 drives the pressure ring 206 to move toward the rubber ring 203 during the process of the top block 210 expanding outward, thereby increasing the fitting pressure between the rubber ring 203, the filter mechanism 3 and the valve body 1. According to the increase in water pressure, the sealing is improved, and the outer side of the slide plate 207 is slidably adapted to the inner wall of the gate plate 201, the opposite surface of the slide plate 207 is an inclined surface, and the top block 210 is slidably installed between the slide plates 207, and the outer side of the top block 210 is slidably adapted to the opposite surface of the slide plate 207.

[0035] The inner wall of the gate 201 is slidably mounted with a slide column 211, and a collar 209 is fixedly mounted on one end of the outer side of the slide column 211. The collar 209 is located on the inner side of the gate 201, and the opposite surface of the collar 209 is rotatably mounted with a connecting arm 208. The end of the connecting arm 208 away from the collar 209 is rotatably mounted on the opposite surface of the top block 210. The end of the slide column 211 away from the collar 209 is fixedly mounted with a sliding plate 204. The outer side of the sliding plate 204 is slidably mounted on the inner wall of the gate 201. Dynamic adaptation, when the worker drives the valve core 2 through the valve stem mechanism 4 to close the flow pipe inside the valve body 1, the valve stem mechanism 4 drives the gate 201 to move downward through the connecting plate 202, so that the positioning block 205 at the bottom of the gate 201 is engaged with the groove in the valve body 1, and the position of the gate 201 is positioned, so that the gate 201 separates and closes the flow pipe, and the sliding plate 204 is located on the outside of the ring 209, and the positioning block 205 is fixedly installed on the bottom of the gate 201.

[0036] The second embodiment is based on the first embodiment. Figure 3 to Figure 4As shown, the filter mechanism 3 includes a fixed cylinder 31, the outer side of the fixed cylinder 31 is fixedly installed with the inner wall of the valve body 1, and the fixed cylinder 31 is located at the flow pipe of the valve body 1, the inner wall of the fixed cylinder 31 is provided with an annular groove, and a slide groove cylinder 33 is fixedly installed at the annular groove of the fixed cylinder 31. In the process of filtering the liquid passing through the filter mechanism 3, the liquid in the pipeline enters the interior of the fixed cylinder 31 through the flow pipe of the valve body 1, so that the liquid flows through the interior of the fixed cylinder 31. In the process of the liquid flowing through, the liquid passing through is filtered by the inner filter cover 32, so that the liquid passes through and flows to the other side. The inner wall of the slide groove cylinder 33 is evenly provided with grooves, and the filter cover 32 is installed on the inner side of the slide groove cylinder 33. Blocks are evenly arranged on the outer side of the filter cover 32, and the filter cover 32 is slidably adapted to the grooves of the slide groove cylinder 33 through the blocks. A support frame 34 is fixedly installed at the center position of the filter cover 32 near the valve core 2, and a connecting column 35 is fixedly installed at one end of the support frame 34 away from the filter cover 32, and an arc block 36 is fixedly installed at one end of the connecting column 35 away from the support frame 34, and the side of the arc block 36 away from the connecting column 35 is a centrally raised arc surface. During the closing process, when the liquid in the pipeline surges, the contact between the filter cover 32 and the liquid is utilized to make the surging liquid impact the filter cover 32, so that the filter cover 32 slides in the groove of the slide tube 33 through the block, so that the filter cover 32 is close to the valve core 2, and the support frame 34 and the connecting column 35 drive the arc block 36 to squeeze the sliding disk 204, and cooperate with the valve core 2 to seal the gate valve when the liquid in the pipeline surges rapidly, and the side of the arc block 36 away from the connecting column 35 contacts the outer side of the sliding disk 204.

[0037] The third embodiment is based on the first and second embodiments. Figures 8 to 9 As shown, the valve stem mechanism 4 includes a fixing frame 41 and a sleeve 47. The fixing frame 41 is fixedly installed at the center position of the top of the valve cover 5, and the sleeve 47 is fixedly installed at the bottom of the valve cover 5. A swivel 43 is rotatably installed on the top of the fixing frame 41, and a threaded rod 42 is threadedly connected to the inner wall of the swivel 43. When a worker rotates the swivel 43 and utilizes the threaded connection between the swivel 43 and the threaded rod 42, the threaded rod 42 is driven to move up and down during the rotation of the swivel 43. The connecting plate 44 rotatably connected to the bottom of the threaded rod 42 drives the valve core 2 to move up and down to control the opening and closing of the flow channel inside the valve body 1. The bottom end of the threaded rod 42 passes through the valve cover 5 and extends to the bottom. A connecting plate 44 is rotatably installed on the bottom end of the threaded rod 42. The bottom of the connecting plate 44 is fixedly connected to the top of the gate plate 201 through the connecting plate 202, and a top ring 49 is fixedly installed on the top of the outer side of the sleeve 47.

[0038] A slip ring 48 is slidably mounted on the outer side of the sleeve 47, and a top ring 49 is made of rubber material. A groove ring 46 is fixedly mounted on the top of the connecting plate 44, and a bottom ring 45 is fixedly mounted on the top of the outer side of the groove ring 46. The bottom ring 45 is made of rubber material, and the outer side of the bottom ring 45 contacts the inner wall of the valve body 1. An annular protrusion is arranged at the bottom of the slip ring 48, and the annular protrusion of the slip ring 48 is located directly above the bottom ring 45. In the process of fully opening the flow pipe inside the valve body 1, the threaded rod 42 drives the connecting plate 44 to move upward, so that the connecting plate 4 4 drives the groove ring 46 and the bottom ring 45 to move upward along the inner wall of the valve body 1. During the upward movement, the annular protrusion at the bottom of the slip ring 48 contacts the top of the bottom ring 45, and the slip ring 48 is squeezed in the middle position through the top ring 49 and the bottom ring 45. At the same time, the bottom ring 45 and the top ring 49 are deformed by rubber at the same time during the reaction force, increasing the fitting pressure between the slip ring 48 and the valve body 1. The slip ring 48 is located at the bottom of the top ring 49, and the top of the slip ring 48 is tightly fitted with the bottom of the top ring 49, and the outer side of the top ring 49 is fitted with the inner wall of the valve body 1.

[0039] When in use, workers connect the pipeline to the valve body 1, control the position of the valve core 2 through the valve stem mechanism 4, realize the opening and closing of the circulation pipeline inside the valve body 1, and control the circulation inside the connecting pipelines on both sides. At the same time, during the flow of liquid, the filtering mechanism 3 filters the flowing liquid.

[0040] When the worker drives the valve core 2 through the valve stem mechanism 4 to close the flow pipe inside the valve body 1, the valve stem mechanism 4 drives the gate plate 201 to move downward through the connecting plate 202, so that the positioning block 205 at the bottom of the gate plate 201 is engaged with the groove in the valve body 1, and the position of the gate plate 201 is positioned so that the gate plate 201 separates and closes the flow pipe. During the closing process, the rubber ring 203 contacts the edge of the filter mechanism 3, and the rubber ring 203 seals the fitting between the filter mechanism 3 and the valve core 2. When the hydraulic pressure on one side increases, the hydraulic pressure pushes the sliding plate 204 through the contact between the liquid and the sliding plate 204. The sliding plate 204 drives the sliding column 211 to move toward the center position of the inner side of the gate plate 201, and drives the sleeve rings 209 to approach each other during the movement. At the same time, during the approaching process, the top block 210 is driven to move outward through the connecting arm 208. During the movement of the top block 210 outward, the arc surface of the top block 210 and the slide plate 207 are adapted to slide, so that the slide plate 207 drives the pressure ring 206 to move toward the rubber ring 203 during the expansion of the top block 210 outward, thereby increasing the fitting pressure between the rubber ring 203, the filter mechanism 3 and the valve body 1, and improving the sealing performance according to the increase of water pressure.

[0041] In the process of filtering the flowing liquid through the filtering mechanism 3, the liquid in the pipeline enters the interior of the fixed cylinder 31 through the circulation pipeline of the valve body 1, so that the liquid flows through the interior of the fixed cylinder 31. In the process of the liquid flowing through, the flowing liquid is filtered by the inner filter cover 32, so that the liquid passes through and flows to the other side. At the same time, in the process of closing, when the liquid in the pipeline surges, the contact between the filter cover 32 and the liquid is utilized to make the surging liquid impact the filter cover 32, so that the filter cover 32 slides in the groove of the slide groove cylinder 33 through the block, so that the filter cover 32 is close to the valve core 2, and the support frame 34 and the connecting column 35 are used to drive the arc block 36 to squeeze the sliding plate 204, so as to cooperate with the valve core 2 to seal the gate valve when the liquid in the pipeline surges rapidly.

[0042] When the valve core 2 is driven to move by the valve stem mechanism 4, the worker rotates the swivel 43 and utilizes the threaded connection between the swivel 43 and the threaded rod 42. During the rotation of the swivel 43, the threaded rod 42 is driven to move up and down, and the connecting plate 44 rotatably connected to the bottom of the threaded rod 42 drives the valve core 2 to move up and down, thereby controlling the opening and closing of the flow pipe inside the valve body 1. At the same time, during the process of fully opening the flow pipe inside the valve body 1, the threaded rod 42 drives the connecting plate 44 to move upward, so that the connecting plate 44 drives the groove ring 46 and the bottom ring 45 to move upward along the inner wall of the valve body 1. During the upward movement, the annular protrusion at the bottom of the slip ring 48 contacts the top of the bottom ring 45, and the slip ring 48 is squeezed in the middle position by the top ring 49 and the bottom ring 45. At the same time, the bottom ring 45 and the top ring 49 are deformed by rubber at the same time during the reaction force, thereby increasing the fitting pressure between the valve body 1.

[0043] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A high sealing performance two-way gate valve, characterized in that: include: A valve body (1), the valve body (1) being used to be connected to a pipeline and having a flow pipeline inside, a valve cover (5) being fixedly mounted on the top of the valve body (1) by means of bolts; A valve core (2), the valve core (2) being used to close the flow channel of the valve body (1), and the valve core (2) being installed at a central position inside the valve body (1); A filter mechanism (3), the filter mechanism (3) being used to filter the liquid flowing through, and the filter mechanism (3) being symmetrically mounted inside the valve body (1) along the center position of the axis of the valve body (1); A valve stem mechanism (4), the valve stem mechanism (4) being used to control the position of the valve core (2), and the valve stem mechanism (4) being fixedly mounted on the top of the valve cover (5); The valve core (2) comprises a gate plate (201), a connecting plate (202) is fixedly mounted on the top of the outer side of the gate plate (201), the gate plate (201) is fixedly connected to the bottom of the valve stem mechanism (4) via the connecting plate (202), and annular grooves are symmetrically provided on the outer side of the gate plate (201), a pressure ring (206) is slidably mounted on the annular grooves of the gate plate (201), and a rubber ring (206) is fixedly mounted on the non-opposite surface of the pressure ring (206). 3) Slide plates (207) are fixedly mounted on opposite surfaces of the pressure ring (206), the slide plates (207) are evenly mounted along the center of the pressure ring (206), and the outer sides of the slide plates (207) are slidably fitted with the inner wall of the gate plate (201), the opposite surfaces of the slide plates (207) are inclined surfaces, and a top block (210) is slidably mounted between the slide plates (207), and the outer sides of the top block (210) are slidably fitted with the opposite surfaces of the slide plates (207); A sliding column (211) is slidably mounted on the inner wall of the gate plate (201), a collar (209) is fixedly mounted on one end of the outer side of the sliding column (211), the collar (209) is located on the inner side of the gate plate (201), and connecting arms (208) are rotatably mounted on the opposite surfaces of the collar (209), and one end of the connecting arm (208) away from the collar (209) is rotatably mounted on the opposite surface of the top block (210); A sliding plate (204) is fixedly mounted on one end of the sliding column (211) away from the collar (209); the outer side of the sliding plate (204) is slidably matched with the inner wall of the gate plate (201); the sliding plate (204) is located on the outer side of the collar (209); and a positioning block (205) is fixedly mounted on the bottom of the gate plate (201).

2. A high sealing performance bidirectional gate valve according to claim 1, characterized in that: The filtering mechanism (3) comprises a fixed cylinder (31), the outer side of the fixed cylinder (31) being fixedly mounted to the inner wall of the valve body (1), and the fixed cylinder (31) being located at the flow conduit of the valve body (1), the inner wall of the fixed cylinder (31) being provided with an annular groove, and a slide groove cylinder (33) being fixedly mounted at the annular groove of the fixed cylinder (31), and the inner wall of the slide groove cylinder (33) being evenly provided with grooves.

3. A high sealing performance bidirectional gate valve according to claim 2, characterized in that: A filter cover (32) is installed on the inner side of the slide groove cylinder (33), and blocks are evenly arranged on the outer side of the filter cover (32). The filter cover (32) is slidably adapted to the groove of the slide groove cylinder (33) through the blocks. A support frame (34) is fixedly installed at the center position of the filter cover (32) on a side close to the valve core (2), and a connecting column (35) is fixedly installed on one end of the support frame (34) away from the filter cover (32).

4. A high sealing performance bidirectional gate valve according to claim 3, characterized in that: An arc surface block (36) is fixedly mounted on one end of the connecting column (35) away from the support frame (34), and a side of the arc surface block (36) away from the connecting column (35) is a centrally raised arc surface, and a side of the arc surface block (36) away from the connecting column (35) contacts the outer side of the sliding plate (204).

5. A high sealing performance bidirectional gate valve according to claim 1, characterized in that: The valve stem mechanism (4) comprises a fixing frame (41) and a sleeve (47); the fixing frame (41) is fixedly mounted at the center position of the top of the valve cover (5); the sleeve (47) is fixedly mounted at the bottom of the valve cover (5); a swivel (43) is rotatably mounted on the top of the fixing frame (41); and a threaded rod (42) is threadedly connected to the inner wall of the swivel (43).

6. A high sealing performance bidirectional gate valve according to claim 5, characterized in that: The bottom end of the threaded rod (42) passes through the valve cover (5) and extends to the bottom. A connecting plate (44) is rotatably mounted on the bottom end of the threaded rod (42). The bottom of the connecting plate (44) is fixedly connected to the top of the gate plate (201) via a connecting plate (202). A top ring (49) is fixedly mounted on the top of the outer side of the sleeve (47). A sliding ring (48) is slidably mounted on the outer side of the sleeve (47). The top ring (49) is made of rubber material.

7. A high sealing performance bidirectional gate valve according to claim 6, characterized in that: A groove ring (46) is fixedly mounted on the top of the connection plate (44), and a bottom ring (45) is fixedly mounted on the top of the outer side of the groove ring (46). The bottom ring (45) is made of rubber material, and the outer side of the bottom ring (45) is in contact with the inner wall of the valve body (1).

8. A high sealing performance bidirectional gate valve according to claim 6, characterized in that: An annular protrusion is provided at the bottom of the slip ring (48), and the annular protrusion of the slip ring (48) is located directly above the bottom ring (45). The slip ring (48) is located at the bottom of the top ring (49), and the top of the slip ring (48) is tightly fitted with the bottom of the top ring (49), and the outer side of the top ring (49) is fitted with the inner wall of the valve body (1).

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