Parallel type single-gate-disc gate valve

Abstract

The utility model relates to the technical field of parallel single-gate valves, in particular to a parallel single-gate gate valve which comprises a pneumatic assembly, the pneumatic assembly is fixedly connected to a valve cover, two parallel valve seats are arranged in a valve body, and a gate cavity is communicated with the lower portion between the two valve seats. A piston is slidably connected in the air cylinder and divides the air cylinder into an upper cavity and a lower cavity, the upper end of the piston is fixedly connected with a spring, the lower end of the piston is fixedly connected with a gate rod, the gate rod penetrates through the valve deck and is fixedly connected with a gate plate, and the gate plate and the valve seat are slidably sealed. The piston is adopted for control through the pneumatic assembly, the piston moves upwards to drive the gate rod to move upwards, the gate rod moves upwards to pull the gate plate upwards so that the valve hole can be communicated with the valve seat, and therefore opening, spring resetting, gate plate downward moving and valve seat closing are achieved, and closing is achieved; the gate plate is controlled to move up and down through movement of the piston so that the device can be controlled to be opened and closed; therefore, the device is simple and convenient.

Description

Technical Field

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

[0002] The parallel single disc valve is a type of single disc valve. It is named because the two sealing surfaces of its disc are parallel and the valve seat sealing surface is perpendicular to the center line of the pipeline. It cannot rely on its body to achieve forced sealing. It must use a fixed or floating soft valve seat. It is suitable for medium and low pressure large and medium calibers, and the medium is oil and natural gas.

[0003] A Chinese patent with publication number CN217463266U was searched and disclosed a parallel single-disc gate valve with a stroke control structure.

[0004] The above technical solution includes a valve body, a gate rod, and a gate plate, wherein a T-slot is provided at the upper end of the gate plate, and the lower end of the gate rod is connected to the center of the anti-collision plate and then connected to the T-slot at the upper end of the gate plate, and the thickness and width of the anti-collision plate are adapted to the lower end height and width of the T-slot; stepped holes are symmetrically provided on both sides of the anti-collision plate, one end of the stepped hole is a threaded hole and is successively installed with a T-pin and a spring, and then tightened with a hexagonal screw plug and the threaded hole of the stepped hole, and the other end of the T-pin extends out of the lower end face of the anti-collision plate and first contacts with the boss provided at the valve seat of the valve body during the downward sealing process. The utility model achieves the purpose of accurately positioning the sealing surface of the gate plate in a state of non-impact positioning during the closing stroke, and has a simple structure, is easy to manufacture, is light in weight, and is convenient for online maintenance;

[0005] However, in the above scheme, the technology uses the method of turning the handwheel to open and close the valve body, and the gate opening and closing process is cumbersome and laborious. It is necessary to manually turn the handwheel to slowly drop or raise the gate. During the opening and closing process of the valve body, the medium will also react the resistance on the handwheel. The gate has a long reaction time. The handwheel rotates one circle and the gate drops a unit distance. The opening and closing stroke of the handwheel is positively correlated with the gate weight and the medium pressure, while considering the convenience and practicality of use.

[0006] For this reason, we propose a parallel single-disc gate valve. Utility Model Content

[0007] The utility model mainly solves the technical problems existing in the above-mentioned prior art and provides a parallel single-disc gate valve.

[0008] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a parallel single-disc gate valve, comprising a pneumatic assembly, characterized in that: the pneumatic assembly is fixedly connected to the valve cover, the valve cover is arranged on the valve body, two parallel valve seats are arranged in the valve body, and a gate cavity is connected below the two valve seats;

[0009] A pneumatic component is connected to an air source component, and the pneumatic component includes a cylinder, a piston is slidably connected in the cylinder, the piston divides the cylinder into an upper chamber and a lower chamber, a spring is fixedly connected to the upper end of the piston, a gate rod is fixedly connected to the lower end of the piston, the gate rod passes through the valve cover and is fixedly connected to the gate plate, the gate plate is slidably sealed with the valve seat, and a valve hole is provided on the gate plate.

[0010] Preferably, a first air inlet is provided at the upper end of the cylinder, the cylinder is fixedly connected to the valve cover via a cylinder seat, a second air inlet is provided on one side of the cylinder seat, and the first air inlet and the second air inlet are connected to the air source assembly.

[0011] Preferably, the first air inlet is communicated with the upper chamber, and the second air inlet is communicated with the lower chamber.

[0012] Preferably, a sealing member is fixedly connected to the inner bottom end of the cylinder seat, and the gate rod is slidably connected in the sealing member.

[0013] Preferably, the air source assembly includes an air intake tee, one side of the air intake tee is connected to an air source valve, an upper end of the air intake tee is fixedly connected to a first solenoid valve, and the first solenoid valve is connected to the upper chamber through a first air pipe.

[0014] Preferably, a second solenoid valve is fixedly connected to the lower end of the air intake tee, and the second solenoid valve is connected to the air supply tee through a connecting pipe.

[0015] Preferably, a second air pipe is provided on one side of the gas supply tee, the second air pipe is connected to the lower chamber, and a third solenoid valve is provided at the lower end of the gas supply tee.

[0016] The utility model provides a parallel single-disc gate valve, which has the following improvements and advantages compared with the prior art:

[0017] (1) The utility model adopts a pneumatic component to control the opening and closing of the gate plate. The pneumatic component includes a cylinder, a piston is slidably connected in the cylinder, the piston divides the cylinder into an upper chamber and a lower chamber, a spring is fixedly connected to the upper end of the piston, and a gate rod is fixedly connected to the lower end of the piston. The gate rod passes through the valve cover and is fixedly connected to the gate plate. The gate plate and the valve seat are slidably sealed. A valve hole is provided on the gate plate. The pneumatic component is controlled by a piston. When the piston moves up, the gate rod drives the gate rod up. The gate rod moves up and pulls the gate plate upward to connect the valve hole with the valve seat, thereby opening. The spring is reset, the gate plate moves down, and the valve seat is sealed, thereby closing. The gate plate is controlled to move up and down by the movement of the piston, thereby controlling the opening and closing of the device. The hand wheel is replaced for driving, which is simple and convenient.

[0018] (2) The utility model adopts a dynamic component to connect the air source component, and the air source component is provided with an air intake tee, one side of the air intake tee is connected with an air source valve, the upper end of the air intake tee is fixedly connected with a first solenoid valve, the first solenoid valve is connected with the upper chamber through a first air pipe, the lower end of the air intake tee is fixedly connected with a second solenoid valve, the second solenoid valve is connected with the air supply tee through a connecting pipe, one side of the air supply tee is provided with a second air pipe, the second air pipe is connected with the lower chamber, and the lower end of the air supply tee is provided with a third solenoid valve, the pneumatic component is controlled to work by the air source component, compressed gas enters the air intake tee from the air source valve, the second solenoid valve is connected, the compressed gas enters the lower chamber, and pushes up the piston, thereby opening the device, the first solenoid valve is opened, the second solenoid valve is closed, the third solenoid valve is opened, the compressed gas pushes the piston downward, the piston moves downward to discharge the compressed gas in the lower chamber, and cooperates with the spring to quickly close the device, the movement of the gate is affected by the air source component and the spring, the closing time is greatly reduced, and it can respond quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0020] Figure 1 It is a three-dimensional schematic diagram of the structure of the utility model;

[0021] Figure 2 It is a three-dimensional schematic diagram of the structure of the pneumatic component in the utility model;

[0022] Figure 3 It is a schematic structural plane diagram of the gas source component in the utility model.

[0023] Legend:

[0024] 10. Valve body; 11. Gate chamber; 12. Valve cover; 13. Valve seat; 20. Pneumatic component; 21. Cylinder; 22. Piston; 23. Upper chamber; 24. Lower chamber; 25. Cylinder seat; 26. Seal; 27. Spring; 28. Gate rod; 29. ​​Gate plate; 30. Valve hole; 31. First air inlet; 32. Second air inlet; 40. Air source component; 41. Air inlet tee; 42. First solenoid valve; 43. Second solenoid valve; 44. First air pipe; 45. Connecting pipe; 46. Air supply tee; 47. Second air pipe; 48. Third solenoid valve; 49. Air source valve. DETAILED DESCRIPTION

[0025] Below, the invention is further described in conjunction with the accompanying drawings and specific embodiments:

[0026] Example 1

[0027] See also Figure 1 to Figure 2 Embodiment 1 is described, comprising a pneumatic assembly 20, the pneumatic assembly 20 is fixedly connected to the valve cover 12, the valve cover 12 connects the pneumatic assembly 20 and the valve body 10, the valve cover 12 is arranged on the valve body 10, the valve cover 12 is arranged on the valve body 10 and communicates with the valve body 10, two parallel valve seats 13 are arranged in the valve body 10, the valve seats 13 are slidably sealed with the gate plate 29, a gate chamber 11 is communicated between the two valve seats 13 and below, the gate chamber 11 is used to accommodate the gate plate 29, the pneumatic assembly 20, The pneumatic assembly 20 is connected to the air source assembly 40. The pneumatic assembly 20 includes a cylinder 21. The cylinder 21 can accommodate a piston 22. The piston 22 is slidably connected in the cylinder 21. The movement of the piston 22 controls the gate 29 to open and close the valve body 10. The piston 22 divides the cylinder 21 into an upper chamber 23 and a lower chamber 24. The lower chamber 24 opens the valve body 10 when air enters, and the upper chamber 23 closes the valve body 10 when air enters. The upper end of the piston 22 is fixedly connected to a spring 27, and the spring 27 can accelerate the closing of the valve. The piston 22 is fixedly connected to the body 10, and a gate rod 28 is fixedly connected to the lower end of the piston 22. The gate rod 28 penetrates the valve cover 12 and is fixedly connected to the gate plate 29. The gate rod 28 connects the piston 22 and the gate plate 29. The gate plate 29 is slidably sealed with the valve seat 13. A valve hole 30 is provided on the gate plate 29, and the medium flows through the valve hole 30. A first air inlet 31 is provided on the upper end of the cylinder 21. The compressed gas enters the first air inlet 31 to move the piston 22 downward. The cylinder 21 is fixedly connected to the valve cover 12 through the cylinder seat 25. The cylinder seat 25 The valve cover 12 is connected to the cylinder 21, a second air inlet is opened on one side of the cylinder seat 25, the first air inlet 31 and the second air inlet are connected to the air source assembly 40, the second air inlet enters the compressed gas to control the piston 22 to move upward, the first air inlet 31 is connected to the upper chamber 23, and the second air inlet is connected to the lower chamber 24. A seal 26 is fixedly connected to the bottom end of the cylinder seat 25, and the seal 26 is used to ensure the sealing of the cylinder 21 and the valve body 10, and the gate rod 28 is slidably connected in the seal 26;

[0028] In this embodiment, driven by the air source assembly 40, the piston 22 moves upward, the piston 22 drives the gate rod 28 to move upward, the gate rod 28 drives the gate plate 29 to move upward, and the gate plate 29 slides on the valve seat 13, thereby connecting the valve hole 30 with the valve seat 13, and the valve body 10 is connected, allowing the medium to pass through, the piston 22 moves downward, the gate rod 28 drives the gate plate 29 to move downward, and the gate plate 29 slides downward on the valve seat 13, thereby connecting the valve hole 30 with the valve seat 13, and the medium cannot pass through, blocking the valve body 10, and the gate plate 29 is controlled to move up and down by the movement of the piston 22, thereby controlling the opening and closing of the device, instead of driving with a hand wheel, which is simple and convenient.

[0029] Example 2

[0030] See also Figure 1and Figure 3 Embodiment 2 is described, including an air source component 40 including an air intake tee 41, an action chamber of the air intake tee 41 is connected to an air source, a first solenoid valve 42 is arranged on one side for closing the valve body 10, and a second solenoid valve 43 is arranged on one side for opening the valve body 10, an air source valve 49 is connected to one side of the air intake tee 41, the air source valve 49 is connected to the compressed gas, a first solenoid valve 42 is fixedly connected to the upper end of the air intake tee 41, the first solenoid valve 42 controls the flow direction of the compressed gas, the first solenoid valve 42 is connected to the upper chamber 23 through a first air pipe 44, the first air pipe 44 is connected to the first air inlet 31, and the compressed gas entering the upper chamber 23 pushes the piston 22 to move downward, A second solenoid valve 43 is fixedly connected to the lower end of the air inlet tee 41. The second solenoid valve 43 is used to control the flow direction of the compressed gas. The second solenoid valve 43 is connected to the air supply tee 46 through a connecting pipe 45. The function of the air supply tee 46 is to discharge or discharge the compressed gas. A second air pipe 47 is provided on one side of the air supply tee 46. The second air pipe 47 is connected to the lower chamber 24. The compressed gas enters the lower chamber 24 to move the piston 22 upward. A third solenoid valve 48 is provided at the lower end of the air supply tee 46. When the third solenoid valve 48 is opened, the compressed gas is discharged from it. The third solenoid valve 48 is in the same state as the first solenoid valve 42, and is opposite to the state of the second solenoid valve 43.

[0031] In this embodiment, compressed gas enters the air intake tee 41 from the air source valve 49, the first solenoid valve 42 and the third solenoid valve 48 are closed, and the second solenoid valve 43 is opened. The compressed gas enters the connecting pipe 45 from the air intake tee 41, then enters the air delivery tee 46, and then enters the lower chamber 24 from the second air pipe 47 to lift the piston 22, and the device is opened. The first solenoid valve 42 and the third solenoid valve 48 are opened, and the second solenoid valve 43 is closed. The compressed gas enters the first air pipe 44 from the air intake tee 41, and then enters the upper chamber 23 to push the piston 22 downward. In conjunction with the spring 27, the compressed gas in the lower chamber 24 can be quickly discharged from the third solenoid valve 48. The movement of the gate 29 is affected by the air source assembly 40 and the spring 27, and the closing time is greatly reduced, which can respond quickly.

Claims

1. A parallel single-disc gate valve, comprising a pneumatic assembly (20), characterized in that: The pneumatic assembly (20) is fixedly connected to the valve cover (12), the valve cover (12) is arranged on the valve body (10), two valve seats (13) arranged in parallel are arranged in the valve body (10), and a gate chamber (11) is communicated between the two valve seats (13) below; A pneumatic component (20), wherein the pneumatic component (20) is connected to an air source component (40), and the pneumatic component (20) comprises a cylinder (21), wherein a piston (22) is slidably connected inside the cylinder (21), wherein the piston (22) divides the cylinder (21) into an upper chamber (23) and a lower chamber (24), wherein a spring (27) is fixedly connected to the upper end of the piston (22), wherein a gate rod (28) is fixedly connected to the lower end of the piston (22), wherein the gate rod (28) passes through a valve cover (12) and is fixedly connected to a gate plate (29), wherein the gate plate (29) is slidably sealed with a valve seat (13), and wherein a valve hole (30) is provided on the gate plate (29).

2. The parallel single-disc gate valve according to claim 1, characterized in that: A first air inlet (31) is provided at the upper end of the cylinder (21); the cylinder (21) is fixedly connected to the valve cover (12) via a cylinder seat (25); a second air inlet is provided on one side of the cylinder seat (25); the first air inlet (31) and the second air inlet are connected to the air source assembly (40).

3. The parallel single-disc gate valve according to claim 2, characterized in that: The first air inlet (31) is in communication with the upper chamber (23), and the second air inlet is in communication with the lower chamber (24).

4. The parallel single-disc gate valve according to claim 2, characterized in that: A sealing member (26) is fixedly connected to the inner bottom end of the cylinder seat (25), and the gate rod (28) is slidably connected inside the sealing member (26).

5. The parallel single-disc gate valve according to claim 1, characterized in that: The air source assembly (40) comprises an air intake tee (41), one side of the air intake tee (41) is connected to an air source valve (49), the upper end of the air intake tee (41) is fixedly connected to a first solenoid valve (42), and the first solenoid valve (42) is connected to the upper chamber (23) via a first air pipe (44).

6. The parallel single-disc gate valve according to claim 5, characterized in that: A second solenoid valve (43) is fixedly connected to the lower end of the air intake tee (41), and the second solenoid valve (43) is connected to the air delivery tee (46) through a connecting pipe (45).

7. The parallel single-disc gate valve according to claim 6, characterized in that: A second air pipe (47) is provided on one side of the gas supply tee (46), the second air pipe (47) is communicated with the lower chamber (24), and a third solenoid valve (48) is provided at the lower end of the gas supply tee (46).

Images