Combined high-precision gate valve

Abstract

The invention belongs to the field of gate valves, particularly relates to a combined high-precision gate valve, and aims to solve the problems that an existing gate valve is insufficient in sealing performance, difficult to maintain and replace, poor in structural stability and inconvenient to operate and control, the combined high-precision gate valve comprises a main valve body and an auxiliary valve body, and the auxiliary valve body is located at the top of the main valve body and fixedly connected through a plurality of screws; according to the valve, when the valve plates move downwards to block a circular hole to achieve fluid connection and disconnection, a gap between the two valve plates is matched with a limiting strip, meanwhile, the valve plates push a circular blocking block to move transversely, an arc-shaped baffle is driven to rotate by rotating a rotating ring, and therefore the circular blocking block is blocked through the arc-shaped baffle. After the braking state of the operation block is released, the sliding limiting box is exposed out of the operation block, when the valve rod continues to move upwards, the pushing block can abut against the L-shaped limiting plate, and after the screw connecting the main valve body and the auxiliary valve body is detached, the pushing block pushes the L-shaped limiting plate to enable the main valve body and the auxiliary valve body to be rapidly separated.

Description

Technical Field

[0001] The present invention relates to the technical field of gate valves, and in particular to a combined high-precision gate valve. Background Art

[0002] In the field of industrial production and fluid control, gate valves, as an important fluid control device, are widely used in various pipeline systems to control the on / off and flow regulation of fluids. However, traditional gate valves have many problems in actual use: Some gate valves have simple sealing structures. After long-term use, wear and corrosion between the valve disc and seat can lead to fluid leakage. This not only wastes resources, but can also pollute the environment and even cause safety accidents. Traditional gate valves are particularly difficult to meet the stringent sealing standards in applications with strict sealing requirements, such as the chemical, petroleum, and natural gas industries.

[0003] When critical components such as the valve plate within a gate valve become damaged and require replacement, traditional gate valve structures often result in a complex and cumbersome disassembly process. This requires removing the entire gate valve from the pipeline system, or even partially destroying the structure to retrieve the damaged component. This not only increases repair time and costs, but can also affect the normal operation of the pipeline system, resulting in significant financial losses for the enterprise.

[0004] The connection structure and installation method of some gate valves are not reasonable. When subjected to long-term fluid impact and vibration, they are prone to loosening, deformation and other problems, causing the gate valve to fail to work normally and reducing the service life and reliability of the equipment.

[0005] The operating mechanism design of some gate valves is not user-friendly, the operation process is complicated, and special tools and large operating force are required, which brings inconvenience to operators and increases the risk of operating errors. Summary of the Invention

[0006] The purpose of the present application is to solve the problems of the conventional gate valve in the prior art, such as the simple sealing structure of some gate valves, the fluid leakage phenomenon caused by the wear and corrosion between the valve plate and the valve seat after long-term use, the waste of resources, the pollution to the environment, and even the safety accidents. Especially in some occasions with high sealing requirements, such as chemical industry, petroleum industry, natural gas industry, etc., the traditional gate valve cannot meet the strict sealing standard. When the key components such as the valve plate inside the gate valve are damaged and need to be replaced, the traditional gate valve structure often leads to a complex and tedious disassembly process. The entire gate valve needs to be removed from the pipeline system, and even the damaged parts need to be taken out by damaging part of the structure, which not only increases the maintenance time and cost, but also may affect the normal operation of the pipeline system, causing great economic loss to the enterprise. The connection structure and installation method of some gate valves are not reasonable, and under the condition of long-term fluid impact and vibration, the gate valve may be loose and deformed, which may cause the gate valve to work abnormally, reduce the service life and reliability of the equipment. The operation mechanism of some gate valves is not humanized, the operation process is complex, and special tools and large operating force are needed, which brings inconvenience to the operator and increases the risk of operation errors. A combined high-precision gate valve is provided.

[0007] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows: A combined high-precision gate valve, comprising a main valve body and an auxiliary valve body, the auxiliary valve body is located at the top of the main valve body and is fixedly connected by a plurality of screws, the two ends of the main valve body are integrally formed with connecting flanges, a valve rod is threaded through the inside of the auxiliary valve body, a hand wheel is fixedly connected to the top of the valve rod, a rotating block is rotatably connected to the bottom of the valve rod, two valve plates are fixedly connected to the bottom of the rotating block through a connecting assembly, a limiting strip is fixedly connected to the inner wall of the main valve body on both sides, the limiting strip is located between the two valve plates, and the two valve plates are fixedly connected by a same connecting rod; A fixed rectangular box is fixedly installed on the inner wall of the bottom of the main valve body, and a control assembly is arranged in the fixed rectangular box; A circular hole is formed in the inside of the main valve body, and two groups of sealing assemblies are fixedly installed in the inside of the circular hole; When the valve rod moves downward, the valve plate moves downward along the limiting strip to block the circular hole, and the sealing assembly is activated to enhance the sealing performance. When the valve plate needs to be disassembled, the control assembly is operated to release the restriction of the connecting assembly, so that the main valve body and the auxiliary valve body can be separated.

[0008] In a possible design, the connecting assembly includes two side rectangular holes respectively opened on both sides of the rotating block, and fixed convex plates are fixedly connected on both sides of the bottom inner wall of the side rectangular holes, and the same limiting horizontal plate is slidably connected between the two side L-shaped limit blocks, one end of the limiting horizontal plate is fixedly connected to the vertical plate, and the bottom side of the vertical plate is fixedly connected to an arc-shaped convex plate, and the same second tension spring is fixedly connected between the two vertical plates, and the bottom side of the limiting horizontal plate is fixedly connected to a strip rod, and the bottom inner wall of the side rectangular hole is opened with an upper strip groove, and lower strip grooves are opened on both sides of the bottom of the rotating block, and the strip rod can be embedded in the upper strip groove or the lower strip groove to achieve connection or release of restriction.

[0009] In one possible design, a rectangular slide groove is provided on one side of the side L-shaped limit block, and a second sliding block is slidably connected to the inside of the rectangular slide groove. A second compression spring is provided between one side of the second sliding block and an inner wall of one side of the rectangular slide groove. A sealing plate is fixedly connected to one side of the second sliding block, and a connecting cross plate is fixedly connected to one side of the sealing plate. The same pushing block is fixedly connected between the two connecting cross plates, and the fixed protrusion cooperates with the connecting cross plate to push the pushing block to extend outward during disassembly.

[0010] In one possible design, the mounting assembly includes an upper fixed plate fixedly connected to the inner wall of one side of the auxiliary valve body, a lower fixed block fixedly connected to the inner wall of one side of the main valve body, side connecting plates slidably connected on both sides of the bottom of the upper fixed plate, an L-shaped limit plate fixedly connected to the bottom of the side connecting plate, the top side of the L-shaped limit plate abuts against the bottom of the lower fixed block, a first tension spring fixedly connected between the two side connecting plates, and the L-shaped limit plate cooperates with the push block to separate the main valve body and the auxiliary valve body when the push block extends outward.

[0011] Material toggling mechanism, its both sides respectively have a cylinder pressure, and the cylinder pressure bar connects swing arm, and the swing arm end face has hook portion, and a bar passes position between the end of two swing arms and the hook portion.

[0012] In one possible design, the sealing assembly includes a fixing ring fixedly connected to the inner wall of the circular hole, a limiting rod fixedly connected to the inner wall of one side of the fixing ring, and a sealing round block, a limiting groove is provided on one side of the sealing round block, the limiting rod is slidably connected to the inside of the limiting groove, a first compression spring is provided between one end of the limiting rod and the inner wall of one side of the limiting groove, a clearance hole is provided on both sides of the sealing round block, two symmetrically arranged arc holes are provided inside the fixing ring, and two symmetrically arranged arc sealing plates are fixedly connected to one side of the sealing round block, wherein, when the valve plate moves downward, the sealing round block is pushed to move laterally, so that the arc sealing plate enters the arc hole to form a double seal.

[0013] In a possible design, side L-shaped limit blocks are fixedly connected to both sides of the top of the valve plate, and the side L-shaped limit blocks cooperate with the side rectangular holes of the rotating block. In the disassembled state, the valve stem moves upward so that the bottom of the side rectangular hole collides with the side L-shaped limit blocks, and at the same time, the second tension spring pulls the vertical plate to make the strip rod fit into the lower strip groove.

[0014] In a possible design, the clearance holes are provided on both sides of the sealing round block to provide an escape space when the valve plate moves, wherein the valve plate contacts and pushes the sealing round block through the clearance holes when the valve plate moves downward.

[0015] When the cam is in use, the hand wheel is rotated normally, the hand wheel drives the valve stem to move downward, the valve stem drives the rotating block to move downward, and the rotating block drives the valve plate to move downward. After the valve plate moves downward, the circular hole is blocked to realize the flow of the fluid. The gap between the two valve plates cooperates with the limit strip to ensure the stability of the valve plate when moving downward. After the valve plate moves downward, it can push the blocking round block to move horizontally, and the blocking round block moves toward the inside of the fixing ring. At this time, the first compression spring is squeezed, and the setting of the limit rod and the limit groove facilitates the stable movement of the blocking round block. At the same time, the blocking round block drives the arc-shaped blocking plate to move horizontally, and the arc-shaped blocking plate enters the inside of the arc-shaped hole, thereby improving the sealing performance of the device. If the internal valve plate needs to be disassembled and replaced, it is necessary to first move the bottom to release the braking state of the operating block, first rotate the rotating ring, and the rotating ring drives the two arc-shaped baffles to rotate. When the limit protrusion is aligned with the gap between the two arc-shaped baffles, the two limit boxes can be slid. At this time, the two limit boxes drive the first sliding block to slide, and the two limit boxes will leak the operating block out; The operating block can be rotated, and the operating block drives the threaded rod to rotate. Since the threaded rod is threadedly connected to the thread groove, the threaded rod can drive the rectangular plate to move up, and the rectangular plate drives the trapezoidal plate to move up. The rectangular plate always slides inside the fixed rectangular box, thereby ensuring the sealing of the device; At this time, the two inclined surfaces on the top of the trapezoidal plate will push the two arc-shaped convex plates away from each other, and the two arc-shaped convex plates will drive the two vertical plates away from each other, and the two vertical plates will drive the two limit horizontal plates away from each other, and the limit horizontal plate will drive the strip rod to move horizontally, and the strip rod will move out of the interior of the upper strip groove. Because the side L-shaped limit block conflicts with the top inner wall of the side rectangular hole, the bottom of the side L-shaped limit block conflicts with the top of the limit horizontal plate. When the limit horizontal plate is moved out, the rotating block moves up, which will cause the bottom inner wall of the side rectangular hole to conflict with the bottom of the side L-shaped limit block. At this time, the two vertical plates move closer to each other under the tension of the second tension spring, and the bar rod is clamped into the inside of the lower bar groove, thereby ensuring the stability of the connection between the rotating block and the side L-shaped limit block, and the fixed convex plate can move upward to conflict with the connecting horizontal plate on the side of the side L-shaped limit block, and the connecting horizontal plate drives the pushing block to move outward. At this time, the connecting horizontal plate drives the sealing plate to move horizontally, and the sealing plate drives the second sliding block to move horizontally. The second sliding block squeezes the second compression spring, and the second sliding block always slides inside the rectangular sliding groove; At this time, the pushing blocks on both sides extend outward, and when the valve stem continues to move upward, the pushing blocks can conflict with the two L-shaped limit plates. First, remove the multiple screws connecting the main valve body and the auxiliary valve body. When the pushing block pushes the two L-shaped limit plates, the two L-shaped limit plates move away from each other and stretch the first tension spring. At this time, the L-shaped limit plates drive the two side connecting plates away from each other. At this time, the two side connecting plates are separated from the lower fixed block, and then the pushing block can push the upper fixed plate to rise, and then the main valve body and the auxiliary valve body can be quickly removed, which is convenient for replacing the internal valve plate.

[0016] Beneficial effects: When the valve plate moves down to block the circular hole to achieve fluid flow, the gap between the two valve plates cooperates with the limit strip to ensure the stability of the valve plate's downward movement. At the same time, the valve plate pushes the blocking block to move horizontally, and the blocking block drives the arc-shaped blocking plate into the arc-shaped hole. The multi-stage sealing structure effectively improves the sealing performance of the device and prevents fluid leakage.

[0017] In the sealing assembly, the setting of the limit rod and the limit groove ensures the stable movement of the sealing round block, and the first compression spring provides reset and pre-tightening force to further ensure the sealing effect.

[0018] By rotating the rotating ring, the curved baffle rotates, releasing the brake on the operating block, and then the sliding limit box can be used to expose the operating block. Rotating the operating block rotates the threaded rod, which in turn, through a series of mechanical transmission structures, causes the limit plate to drive the bar rod to move horizontally, releasing the connection between the rotating block and the side L-shaped limit block.

[0019] When the valve stem continues to move upward, the pushing block may conflict with the L-shaped limit plate. After removing the screws connecting the main valve body and the auxiliary valve body, the pushing block pushes the L-shaped limit plate to quickly separate the main valve body and the auxiliary valve body, which greatly facilitates the disassembly and replacement of the internal valve plate and reduces maintenance time and cost.

[0020] In the connecting assembly, the second tension spring brings the two vertical plates closer to each other, ensuring that the strip rod is snapped into the interior of the lower strip groove, ensuring the stability of the connection between the rotating block and the side L-shaped limit block.

[0021] In the installation assembly, the first tension spring brings the two side connecting plates closer to each other, and the L-shaped limit plate contacts the lower fixed block, ensuring that the main valve body and the auxiliary valve body are firmly installed and can operate stably under various working conditions.

[0022] The control component is set inside the fixed rectangular box. The operating block drives the threaded rod to rotate to realize the up and down movement control of the rectangular plate and the trapezoidal plate, thereby accurately controlling the braking state release process of the connecting component. It is easy to operate and highly controllable.

[0023] The design of the limit box, rotating ring, arc baffle and limit protrusion makes the braking and releasing operations of the operating block more flexible and safe, avoiding misoperation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the three-dimensional structure of a combined high-precision gate valve proposed by the present invention; Figure 2 This is a schematic diagram of the three-dimensional structure of a combined high-precision gate valve proposed by the present invention from a second perspective; Figure 3 This is an exploded view of a combined high-precision gate valve proposed by the present invention; Figure 4 This is a schematic diagram of the three-dimensional cross-sectional structure of the main valve body in a combined high-precision gate valve proposed by the present invention; Figure 5 This is an exploded view of the sealing round block and valve plate in a combined high-precision gate valve proposed by the present invention; Figure 6 This is an exploded view of the rectangular plate and the limit box in a combined high-precision gate valve proposed by the present invention; Figure 7 This is an exploded view of two limit boxes in a combined high-precision gate valve proposed by the present invention; Figure 8 This is a three-dimensional structural diagram of the side connecting plate and the upper fixing plate in a combined high-precision gate valve proposed by the present invention; Figure 9 This is an exploded view of the side connecting plate and the upper fixing plate of a combined high-precision gate valve proposed by the present invention; Figure 10This is a schematic diagram of the three-dimensional structure of the valve stem and valve plate in a combined high-precision gate valve proposed by the present invention; Figure 11 This is a three-dimensional structural diagram of the valve plate and the side L-shaped limit plate in a combined high-precision gate valve proposed by the present invention; Figure 12 This is an exploded view of the valve stem and vertical plate in a combined high-precision gate valve proposed by the present invention.

[0025] In the figure: 1. Main valve body; 2. Connecting flange; 3. Auxiliary valve body; 4. Handwheel; 5. Limit box; 6. Valve plate; 7. Limit strip; 8. Fixed ring; 9. Round hole; 10. Fixed rectangular box; 11. Arc hole; 12. First compression spring; 13. Limit rod; 14. Clearance hole; 15. Blocking round block; 16. Limiting groove; 17. Arc blocking plate; 18. Trapezoidal plate; 19. Rectangular plate; 20. Threaded groove; 21. Threaded rod; 22. First sliding block; 23. Arc groove; 24. Limiting protrusion; 25. Arc baffle; 26. Operating block; 27. Rotating ring ; 28. Upper fixed plate; 29. ​​Side connecting plate; 30. L-shaped limit plate; 31. Lower fixed block; 32. First tension spring; 33. Valve stem; 34. Side L-shaped limit block; 35. Connecting rod; 36. Rectangular slide; 37. Vertical plate; 38. Lower strip groove; 39. Upper strip groove; 40. Fixed convex plate; 41. Side rectangular hole; 42. Second sliding block; 43. Limiting horizontal plate; 44. Strip rod; 45. Sealing plate; 46. Pushing block; 47. Connecting horizontal plate; 48. Second compression spring; 49. Arc-shaped convex plate; 50. Second tension spring; 51. Rotating block. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] In one embodiment: refer to Figure 1-12 , a specific implementation of a gate valve is as follows: The gate valve's core structure consists of a main valve body 1 and an auxiliary valve body 3. The auxiliary valve body 3 is secured to the top of the main valve body 1 with six evenly spaced screws. Connecting flanges 2 are integrally formed at both ends of the main valve body 1 for pipe connection. A valve stem 33 is threaded through the center of the auxiliary valve body 3. A handwheel 4 is welded to its top, and its bottom is rotatably connected to a rotating block 51 via a bearing. The rotating block 51 has symmetrical rectangular holes 41 on either side. Each of these holes has fixed protruding plates 40 welded to the inner wall at the bottom. A lower strip groove 38 is defined at the bottom, and an upper strip groove 39 is defined at the top.

[0028] The two valve plates 6 are rigidly connected by a connecting rod 35. Side L-shaped stoppers 34 are welded to the tops of the valve plates 6. A second sliding block 42 is embedded in the rectangular slot 36 of the side L-shaped stoppers 34. A second compression spring 48 is positioned between the second sliding block 42 and the end of the rectangular slot 36. A sealing plate 45 is welded to the outside of the second sliding block 42. A connecting cross plate 47 is welded to the outer end of the sealing plate 45. The two connecting cross plates 47 are connected by a push block 46. A horizontal stopper plate 43 is slidably mounted between the side L-shaped stoppers 34. One end of the horizontal stopper plate 43 is welded to a vertical plate 37. An arc-shaped protruding plate 49 is welded to the inner bottom of the vertical plate 37. A second tension spring 50 is connected between the two vertical plates 37. A bar 44 is welded to the bottom of the horizontal stopper plate 43. When the valve plate 6 is in the operating position, the bar 44 engages both the upper and lower strip grooves 39 and 38.

[0029] Limit bars 7 are welded to both sides of the inner wall of the main valve body 1, and a fixed rectangular box 10 is fixedly installed on the bottom inner wall. A rectangular plate 19 is slidably installed in the fixed rectangular box 10, and a trapezoidal plate 18 is welded to the top of the rectangular plate 19. A threaded groove 20 is defined at the bottom to threadably engage with a threaded rod 21 that rotates at the bottom of the main valve body 1. An operating block 26 is welded to the bottom of the threaded rod 21, and a rotating ring 27 is rotatably sleeved on the outer periphery. Two arc-shaped baffles 25 are welded to the bottom of the rotating ring 27. Two first sliding blocks 22 are slidably installed at the bottom of the main valve body 1. A limit box 5 is welded to the bottom of each first sliding block 22. An arc groove 23 is defined at the top of the limit box 5, and a limit protrusion 24 is welded inside the arc groove 23.

[0030] The sealing assemblies are symmetrically positioned within the circular hole 9 of the main valve body 1. Each assembly includes a retaining ring 8 and a sealing block 15. A limiting rod 13 is welded to the inner wall of the retaining ring 8. The sealing block 15 has a limiting groove 16 that slidably engages with the limiting rod 13. A first compression spring 12 is positioned within the limiting groove 16. Clearance holes 14 are defined on either side of the sealing block 15, and two arcuate sealing plates 17 are welded to the outer side. The retaining ring 8 has corresponding arcuate holes 11.

[0031] During normal operation, turning handwheel 4 rotates valve stem 33 downward, and rotating block 51 pushes valve plate 6 steadily downward along stop bar 7. When valve plate 6 contacts sealing block 15, it pushes it into retaining ring 8. First compression spring 12 is compressed, and arcuate sealing plate 17 enters arcuate hole 11, forming a double seal. At this point, bar 44 of stopper plate 43 engages upper groove 39, maintaining a gap between fixed cam 40 and connecting plate 47. Second compression spring 48 holds sealing plate 45 in close contact with the sidewall of valve plate 6.

[0032] When the valve plate 6 needs to be removed, first rotate the rotating ring 27 so that the gap between the arc-shaped baffle plate 25 is aligned with the limiting protrusion 24, and slide the two limiting boxes 5 to expose the operating block 26. Rotating the operating block 26 drives the threaded rod 21 to rotate, and the rectangular plate 19 rises to cause the trapezoidal plate 18 to push the two arc-shaped protrusions 49. The vertical plate 37 drives the limiting horizontal plate 43 to move outward, and the strip rod 44 disengages from the upper strip groove 39. When the valve stem 33 continues to be lifted, the bottom of the side rectangular hole 41 of the rotating block 51 contacts the side L-shaped limiting block 34, and the second tension spring 50 pulls the vertical plate 37 to make the strip rod 44 snap into the lower strip groove 38. At this time, the fixed protrusion 40 pushes the connecting horizontal plate 47, and the pushing block 46 extends outward and pushes open the L-shaped limiting plate 30, releasing the connection restriction between the main and auxiliary valve bodies. After removing the top screws, push up the auxiliary valve body 3 to completely remove the valve plate assembly.

[0033] This structure utilizes multiple seals to ensure tightness in harsh working conditions, such as chemical processing. Modular connection components allow for disassembly-free valve plate replacement. The beveled surfaces of the trapezoidal plate and curved convex plate reduce operating force, while the stop box and curved baffle prevent misoperation. All components are constructed of 304 stainless steel and precision-cast and CNC-machined to ensure dimensional accuracy.

[0034] The present application can be used in the gate valve field, and can also be used in other fields applicable to the present application.

[0035] In another embodiment: Figure 1-12 This is a combined high-precision gate valve used in the gate valve field. The mounting assembly consists of an upper fixing plate 28 on the inner wall of the auxiliary valve body 3 and a lower fixing block 31 on the inner wall of the main valve body 1. Side connecting plates 29 are slidably mounted on both sides of the upper fixing plate 28. L-shaped stop plates 30 are welded to the bottom of the side connecting plates 29, and a first tension spring 32 is connected between the two L-shaped stop plates 30. When the gate valve is assembled, the top of the L-shaped stop plate 30 contacts the bottom of the lower fixing block 31. When the push block 46 extends outward, it can simultaneously push the two L-shaped stop plates 30.

[0036] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A combined high-precision gate valve, characterized in that: include: A main valve body (1) and an auxiliary valve body (3), wherein the auxiliary valve body (3) is located at the top of the main valve body (1) and is fixedly connected by a plurality of screws, and both ends of the main valve body (1) are integrally formed with connecting flanges (2), and the internal thread of the auxiliary valve body (3) passes through a valve stem (33), and the top of the valve stem (33) is fixedly connected to a handwheel (4), and the bottom of the valve stem (33) is rotatably connected to a rotating block (51), and the bottom of the rotating block (51) is fixedly connected to two valve plates (6) through a connecting assembly, and the inner walls on both sides of the main valve body (1) are fixedly connected to a limit strip (7), and the limit strip (7) is located between the two valve plates (6), and the two valve plates (6) are fixedly connected by the same connecting rod (35); A fixed rectangular box (10) is fixedly mounted on the inner wall of the bottom of the main valve body (1), and a control component is arranged inside the fixed rectangular box (10); A circular hole (9) is provided inside the main valve body (1), and two sets of sealing components are fixedly installed in a symmetrical manner inside the circular hole (9); When the valve stem (33) moves downward, the valve plate (6) moves downward along the limit strip (7) to block the circular hole (9), and at the same time, the sealing component is activated to enhance the sealing performance; when the valve plate (6) needs to be disassembled, the operating control component releases the restriction of the connecting component, so that the main valve body (1) and the auxiliary valve body (3) can be separated.

2. The combined high-precision gate valve according to claim 1, characterized in that: The connecting assembly comprises two side rectangular holes (41) respectively opened on both sides of the rotating block (51), fixed convex plates (40) are fixedly connected to both sides of the bottom inner wall of the side rectangular hole (41), and the top two sides of the valve plate (6) are fixedly connected to the side L-shaped limit blocks (34), and the same limit horizontal plate (43) is slidably connected between the two side L-shaped limit blocks (34), and one end of the limit horizontal plate (43) is fixedly connected to the vertical plate (37), and the bottom of the vertical plate (37) is fixedly connected to the vertical plate (37). The side is fixedly connected with an arc-shaped convex plate (49), the two vertical plates (37) are fixedly connected with a same second tension spring (50), the bottom side of the limiting horizontal plate (43) is fixedly connected with a strip rod (44), the bottom inner wall of the side rectangular hole (41) is provided with an upper strip groove (39), and the bottom two sides of the rotating block (51) are provided with lower strip grooves (38), and the strip rod (44) can be embedded in the upper strip groove (39) or the lower strip groove (38) to achieve connection or release of restriction.

3. The combined high-precision gate valve according to claim 2, characterized in that: A rectangular slot (36) is provided on one side of the side L-shaped limit block (34), and a second sliding block (42) is slidably connected inside the rectangular slot (36). A second compression spring (48) is provided between one side of the second sliding block (42) and an inner wall of one side of the rectangular slot (36). A sealing plate (45) is fixedly connected to one side of the second sliding block (42), and a connecting transverse plate (47) is fixedly connected to one side of the sealing plate (45). A same push block (46) is fixedly connected between the two connecting transverse plates (47), and the fixed protruding plate (40) cooperates with the connecting transverse plate (47) to push the push block (46) outward when disassembling.

4. The combined high-precision gate valve according to claim 1, characterized in that: The mounting assembly includes an upper fixed plate (28) fixedly connected to the inner wall of one side of the auxiliary valve body (3), a lower fixed block (31) fixedly connected to the inner wall of one side of the main valve body (1), side connecting plates (29) slidably connected to both sides of the bottom of the upper fixed plate (28), an L-shaped limit plate (30) fixedly connected to the bottom of the side connecting plate (29), a top side of the L-shaped limit plate (30) abuts against the bottom of the lower fixed block (31), a first tension spring (32) fixedly connected between the two side connecting plates (29), and the L-shaped limit plate (30) cooperates with the push block (46) to separate the main valve body (1) and the auxiliary valve body (3) when the push block (46) extends outward.

5. The combined high-precision gate valve according to claim 1, characterized in that: The control assembly includes a rectangular plate (19) slidably connected to the top of a fixed rectangular box (10), a trapezoidal plate (18) is fixedly connected to the top of the rectangular plate (19), the trapezoidal plate (18) is used in conjunction with two arc-shaped convex plates (49), a threaded groove (20) is provided at the bottom of the rectangular plate (19), a threaded rod (21) is rotated through the bottom of the main valve body (1), the threaded rod (21) extends into the interior of the threaded groove (20), the bottom of the threaded rod (21) is fixedly connected to an operating block (26), and the bottom of the main valve body (1) is slidably connected to two symmetrically arranged second control blocks (26). A sliding block (22), the bottom of the first sliding block (22) is fixedly connected to a limit box (5), the two limit boxes (5) are used to cover the operating block (26), the top side of the limit box (5) is provided with an arc groove (23), the top side of the arc groove (23) is fixedly connected to a limit protrusion (24), the outer wall of the threaded rod (21) is rotatably sleeved with a rotating ring (27), the bottom two sides of the rotating ring (27) are fixedly connected to arc baffles (25), the gap between the two arc baffles (25) cooperates with the limit protrusion (24) to release the brake of the limit box (5).

6. The combined high-precision gate valve according to claim 1, characterized in that: The sealing assembly includes a fixing ring (8) fixedly connected to the inner wall of the circular hole (9), a limiting rod (13) fixedly connected to the inner wall of one side of the fixing ring (8), and a blocking round block (15), a limiting groove (16) is provided on one side of the blocking round block (15), the limiting rod (13) is slidably connected to the inside of the limiting groove (16), a first compression spring (12) is provided between one end of the limiting rod (13) and the inner wall of one side of the limiting groove (16), a clearance hole (14) is provided on both sides of the blocking round block (15), two symmetrically arranged arc holes (11) are provided inside the fixing ring (8), and two symmetrically arranged arc sealing plates (17) are fixedly connected to one side of the blocking round block (15), wherein, when the valve plate (6) moves downward, the blocking round block (15) is pushed to move laterally, so that the arc sealing plate (17) enters the arc hole (11) to form a double seal.

7. The combined high-precision gate valve according to claim 1, characterized in that: The side L-shaped limit block (34) cooperates with the side rectangular hole (41) of the rotating block (51), wherein, in the disassembled state, the valve stem (33) moves upward so that the bottom of the side rectangular hole (41) contacts the side L-shaped limit block (34), and at the same time, the second tension spring (50) pulls the vertical plate (37) so that the strip rod (44) is stuck in the lower strip groove (38).

8. The combined high-precision gate valve according to claim 7, characterized in that: The clearance holes (14) are provided on both sides of the blocking round block (15) to provide a clearance space when the valve plate (6) moves, wherein the valve plate (6) contacts and pushes the blocking round block (15) through the clearance holes (14) when the valve plate (6) moves downward.

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