Parallel gate valve

Abstract

The utility model relates to the technical field of gate valves, and discloses a parallel gate valve which comprises a gate valve body, a valve plate is clamped in the gate valve body in a sliding mode, a first valve port and a second valve port are formed in the surface of one side of the valve plate, and the top end of the gate valve body is fixedly connected with a top seat through a bolt. The first valve port moves up and down in the gate valve body to open or close the valve body, when the first valve port is located in the gate valve body, the gate valve body is in an open state at the moment, and when the second valve port is located in the gate valve body, the gate valve body is in a closed state at the moment. Due to the fact that the surfaces of the two sides of the valve element are both lower than the surface of the valve plate, when the valve plate moves downwards, liquid in the gate valve body can enter the interior of the bottom valve seat at the same time, the interior of the gate valve body which is in a closed state for a long time can be cleaned, meanwhile, it can be guaranteed that the pressure ratio difference borne by the valve element is small, and the valve plate can move conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of gate valves, in particular to a parallel gate valve. Background Art

[0002] The gate valve is a gate of an opening and closing component. The movement direction of the gate is perpendicular to the direction of the fluid. The gate valve can only be fully opened or fully closed, and cannot be used for regulation or throttling. The gate has two sealing surfaces. The gate valve is used as a cut-off medium, has small fluid resistance, and the sealing surface is less eroded by impact. It does not change the flow direction of the medium and does not disturb the flow. When fully open, the entire flow is straight, and the pressure loss of the medium is minimal at this time. Gate valves are usually suitable for working conditions that do not require frequent opening and closing, and keep the gate fully open or fully closed. They are not suitable for use as regulation or throttling. For high-speed flowing media, the gate can cause vibration of the gate when it is partially open, and the vibration may damage the sealing surface of the gate and the valve seat, while throttling will cause the gate to be impacted by the medium.

[0003] The parallel soft-sealed gate valve disclosed in application number CN202022721690.3 will not leak liquid during use. No great force is required to squeeze the soft-sealed gate valve to open or close it, which is very labor-saving for the user to operate and is not easy to damage.

[0004] In the process of implementing this application, the inventor found that there are at least the following problems in this technology:

[0005] (1) When the gate valve is closed for a long time, the residue will accumulate inside the gate valve body. The residue will adhere to the valve core and damage the valve core. At the same time, when the valve core is used in a highly corrosive medium, the valve core needs to be replaced. This technology is very inconvenient to replace the valve core.

[0006] (2) This technology cannot accurately determine the opening amplitude of the valve, and cannot achieve precise control of the opening amplitude of the valve.

[0007] Therefore, it is necessary to propose a parallel gate valve. Utility Model Content

[0008] In view of the deficiencies in the prior art, the utility model provides a parallel gate valve, which has the advantages of being easy to clean or maintain and replace the valve core, thereby increasing the service life of the device and intuitively determining the opening amplitude of the valve, thereby solving the problems raised in the background technology.

[0009] The utility model provides the following technical solutions: a parallel gate valve, comprising a gate valve body, an internal sliding clamping valve plate of the gate valve body, a valve port one and a valve port two being opened on one side surface of the valve plate, the top end of the gate valve body being fixedly connected to a top seat by bolts, the top end of the top seat being fixedly connected to a driving block, the inside of the driving block being rotatably connected to an internal threaded cylinder, the top end of the valve plate being fixedly connected to a valve stem, the top end of the valve stem being fixedly connected to a threaded rod, the internal threaded cylinder being threadedly sleeved on the surface of the threaded rod, the bottom end of the gate valve body being fixedly connected to a bottom valve seat by a flange, and the bottom end of the bottom valve seat being provided with a discharge port.

[0010] Preferably, a valve groove is provided on the inner wall of the bottom valve seat, the valve plate is slidably engaged with the valve groove, and the inner diameter of the bottom valve seat is larger than the inner diameter of the second valve port.

[0011] Preferably, the inner wall of the valve port 2 is fixedly connected with an installation inner ring, a valve core is embedded in the interior of the installation inner ring, a sealing ring groove for embedding a sealing ring is opened on the inner wall of the installation inner ring, and the inner wall of the installation inner ring is tightly fitted with the side of the valve core.

[0012] Preferably, sealing rings are fixedly connected to the edges of both side surfaces of the valve core, threaded holes are opened on both sides of the mounting inner ring, and sealing pressure rings are fixedly connected to both side surfaces of the mounting inner ring by bolts, and the inner surface of the sealing pressure ring is tightly abutted against the surface of the sealing ring.

[0013] Preferably, the surface of the threaded rod is slidably connected to the surface of the top seat, the top of the driving block is fixedly connected to a transparent sealing tube, the surface of the transparent sealing tube is provided with a scale mark, and the top of the threaded rod passes through the driving block and extends to the interior of the transparent sealing tube.

[0014] Preferably, the bottom edge of the internally threaded cylinder is fixedly connected with a crown gear, the inner wall of the driving block is rotatably connected with a spur gear, the spur gear meshes with the crown gear, and one side surface of the spur gear is fixedly connected with a turning handle via a connecting rod.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. The valve body is opened or closed by moving the valve port 1 up and down inside the gate valve body. When the valve port 1 is located inside the gate valve body, the gate valve body is in an open state at this time, and when the valve port 2 is located inside the gate valve body, the gate valve body is in a closed state at this time. Since the surfaces on both sides of the valve core are lower than the surface of the valve plate, when the valve plate moves downward, the liquid in the gate valve body will simultaneously enter the bottom valve seat, which can not only clean the inside of the gate valve body that has been in a closed state for a long time, but also ensure that the pressure difference of the valve core is small, which is convenient for the movement of the valve plate. The liquid in the bottom valve seat can be discharged by unscrewing the discharge port to avoid the accumulation of residues inside the gate valve body that has been in a closed state for a long time. At the same time, when the valve core is used in a highly corrosive medium, the valve core needs to be replaced. At this time, only the bottom valve seat and the sealing ring need to be removed to complete the replacement of the valve core. The replacement is more convenient, and there is no need to disassemble the entire gate valve body. The valve core can still be replaced when the gate valve body is normally opened, which greatly saves the investment of manpower and material resources, simplifies the maintenance process, facilitates operation, and improves efficiency.

[0017] 2. Manually turning the handle will drive the spur gear to rotate inside the drive block and drive the crown gear to rotate. During the rotation of the crown gear, the threaded rod will be driven to move up and down inside the top seat, thereby controlling the up and down movement of the valve plate, thereby achieving the effect of controlling the opening and closing of the valve plate, and the lifting and lowering of the threaded rod will be directly presented inside the transparent sealing cylinder. Since the transparent sealing cylinder is made of transparent material, the position of the valve plate in the gate valve body can be accurately judged according to the scale mark on the surface of the transparent sealing cylinder, and then the opening amplitude of the valve can be accurately judged, thereby achieving precise control and achieving the use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the utility model device;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the gate valve body of the utility model;

[0020] Figure 3 for Figure 2 Schematic diagram of some structures;

[0021] Figure 4 This is a schematic diagram of the cross-sectional structure of the valve plate of the utility model.

[0022] In the figure: 1. Gate valve body; 2. Valve slot; 3. Valve port 1; 4. Top seat; 5. Drive block; 6. Transparent sealing cylinder; 7. Scale mark; 8. Bottom valve seat; 9. Discharge port; 10. Valve plate; 11. Valve stem; 12. Threaded rod; 13. Internally threaded cylinder; 14. Crown gear; 15. Spur gear; 16. Turning handle; 17. Valve port 2; 18. Install inner ring; 19. Threaded hole; 20. Valve core; 21. Sealing ring groove; 22. Sealing ring; 23. Sealing pressure ring. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Reference Figure 1-4 A parallel gate valve comprises a gate valve body 1, a valve plate 10 is slidably engaged inside the gate valve body 1, a valve port 1 3 and a valve port 2 17 are provided on one side surface of the valve plate 10, the top end of the gate valve body 1 is fixedly connected with a top seat 4 by bolts, the top end of the top seat 4 is fixedly connected with a driving block 5, the inside of the driving block 5 is rotatably connected with an internal threaded tube 13, the top end of the valve plate 10 is fixedly connected with a valve stem 11, the top end of the valve stem 11 is fixedly connected with a threaded rod 12, the internal threaded tube 13 is threadedly sleeved on the surface of the threaded rod 12, the bottom end of the gate valve body 1 is fixedly connected with a bottom valve seat 8 by a flange, and a discharge port 9 is provided at the bottom end of the bottom valve seat 8.

[0025] The inner wall of the bottom valve seat 8 is provided with a valve groove 2 , the valve plate 10 is slidably engaged with the valve groove 2 , and the inner diameter of the bottom valve seat 8 is larger than the inner diameter of the second valve port 17 , so that the second valve port 17 can be located entirely inside the bottom valve seat 8 .

[0026] Among them, the inner wall of the valve port 2 17 is fixedly connected with an installation inner ring 18, and the interior of the installation inner ring 18 is embedded with a valve core 20. The inner wall of the installation inner ring 18 is provided with a sealing ring groove 21 for embedding a sealing ring. The inner wall of the installation inner ring 18 fits tightly with the side of the valve core 20, which greatly improves the sealing performance of the device.

[0027] Among them, sealing rings 22 are fixedly connected to the edges of the two side surfaces of the valve core 20, threaded holes 19 are opened on both sides of the inner ring 18, and sealing pressure rings 23 are fixedly connected to the two side surfaces of the inner ring 18 by bolts. The inner surface of the sealing pressure ring 23 is tightly abutted against the surface of the sealing ring 22. To replace the valve core 20, only the bottom valve seat 8 needs to be removed, and then the sealing pressure ring 23 can be removed to complete the replacement of the valve core 20. The sealing pressure ring 23 can improve the sealing performance of the device.

[0028] Among them, the surface of the threaded rod 12 is slidably connected to the surface of the top seat 4, the top of the driving block 5 is fixedly connected to the transparent sealing tube 6, the surface of the transparent sealing tube 6 is provided with a scale mark 7, the top of the threaded rod 12 penetrates the driving block 5 and extends to the inside of the transparent sealing tube 6, the lifting and lowering of the threaded rod 12 will be directly presented in the inside of the transparent sealing tube 6, because the transparent sealing tube 6 is made of transparent material, the position of the valve plate 10 in the gate valve body 1 can be accurately judged according to the scale mark 7 on the surface of the transparent sealing tube 6, and then the opening amplitude of the valve can be accurately judged.

[0029] Among them, a crown gear 14 is fixedly connected to the bottom edge of the internal threaded tube 13, and a spur gear 15 is rotatably connected to the inner wall of the driving block 5. The spur gear 15 is meshed with the crown gear 14, and a turning handle 16 is fixedly connected to the one side surface of the spur gear 15 through a connecting rod. Rotating the turning handle 16 will drive the spur gear 15 to rotate inside the driving block 5 and drive the crown gear 14 to rotate. During the rotation of the crown gear 14, the threaded rod 12 will be driven to move up and down inside the top seat 4, thereby realizing the up and down movement of the control valve plate 10 and achieving the effect of controlling the valve plate 10 to open and close.

[0030] Working principle: when the device is in use, the valve body is opened or closed by moving the valve port 1 3 up and down inside the gate valve body 1. When the valve port 1 3 is located inside the gate valve body 1, the gate valve body 1 is in an open state, and when the valve port 2 17 is located inside the gate valve body 1, the gate valve body 1 is in a closed state. Since the surfaces on both sides of the valve core 20 are lower than the surface of the valve plate 10, when the valve plate 10 moves downward, the liquid in the gate valve body 1 will simultaneously enter the bottom valve seat 8, which can not only clean the inside of the gate valve body 1 that is in a closed state for a long time, but also ensure that the pressure ratio difference borne by the valve core 20 is small, which is convenient for the movement of the valve plate 10. The liquid in the bottom valve seat 8 can be discharged by unscrewing the discharge port 9 to avoid the gate valve being in a closed state for a long time. Residues accumulate inside the body 1. At the same time, when the valve core 20 is used in a highly corrosive medium, the valve core 20 needs to be replaced. At this time, only the bottom valve seat 8 and the sealing pressure ring 23 need to be removed to complete the replacement of the valve core 20. Turning the handle 16 will drive the spur gear 15 to rotate inside the drive block 5 and drive the crown gear 14 to rotate. During the rotation of the crown gear 14, the threaded rod 12 will be driven to move up and down inside the top seat 4, thereby controlling the up and down movement of the valve plate 10 and achieving the effect of controlling the opening and closing of the valve plate 10. The lifting and lowering of the threaded rod 12 will be directly presented inside the transparent sealing tube 6. Since the transparent sealing tube 6 is made of transparent material, the position of the valve plate 10 in the gate valve body 1 can be accurately judged according to the scale mark 7 on the surface of the transparent sealing tube 6.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A parallel gate valve, characterized in that: The invention comprises a gate valve body (1), the gate valve body (1) is internally slidably engaged with a valve plate (10), a side surface of the valve plate (10) is provided with a valve port 1 (3) and a valve port 2 (17), the top end of the gate valve body (1) is fixedly connected to a top seat (4) by bolts, the top end of the top seat (4) is fixedly connected to a driving block (5), the inside of the driving block (5) is rotatably connected to an internal threaded tube (13), the top end of the valve plate (10) is fixedly connected to a valve stem (11), the top end of the valve stem (11) is fixedly connected to a threaded rod (12), the internal threaded tube (13) is threadedly sleeved on the surface of the threaded rod (12), the bottom end of the gate valve body (1) is fixedly connected to a bottom valve seat (8) by a flange, and the bottom end of the bottom valve seat (8) is provided with a discharge port (9).

2. A parallel gate valve according to claim 1, characterized in that: The inner wall of the bottom valve seat (8) is provided with a valve groove (2), the valve plate (10) is slidably engaged with the valve groove (2), and the inner diameter of the bottom valve seat (8) is larger than the inner diameter of the second valve port (17).

3. A parallel gate valve according to claim 1, characterized in that: The inner wall of the valve port 2 (17) is fixedly connected with an installation inner ring (18), a valve core (20) is embedded in the interior of the installation inner ring (18), a sealing ring groove (21) for embedding a sealing ring is formed on the inner wall of the installation inner ring (18), and the inner wall of the installation inner ring (18) is tightly fitted with the side surface of the valve core (20).

4. A parallel gate valve according to claim 3, characterized in that: The edges of both side surfaces of the valve core (20) are fixedly connected with sealing rings (22), threaded holes (19) are provided on both sides of the mounting inner ring (18), and both side surfaces of the mounting inner ring (18) are fixedly connected with sealing pressure rings (23) by bolts, and the inner surface of the sealing pressure ring (23) is in close contact with the surface of the sealing ring (22).

5. A parallel gate valve according to claim 1, characterized in that: The surface of the threaded rod (12) is slidably connected to the surface of the top seat (4); the top end of the driving block (5) is fixedly connected to a transparent sealing cylinder (6); a scale mark (7) is provided on the surface of the transparent sealing cylinder (6); and the top end of the threaded rod (12) penetrates the driving block (5) and extends to the interior of the transparent sealing cylinder (6).

6. A parallel gate valve according to claim 1, characterized in that: A crown gear (14) is fixedly connected to the bottom edge of the internally threaded cylinder (13); a spur gear (15) is rotatably connected to the inner wall of the driving block (5); the spur gear (15) is meshed with the crown gear (14); and a side surface of the spur gear (15) is fixedly connected to a turning handle (16) via a connecting rod.

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