Double-circulation anti-loosening stop valve

Abstract

The utility model discloses a double-circulation anti-loosening stop valve which comprises a lower valve body, an upper valve body is arranged above the lower valve body, a cam shaft is arranged in the lower valve body, and a spring and a sealing ball are arranged in the upper valve body. According to the double-circulation anti-loosening stop valve, through cooperation of the lower valve body, the upper valve body, the cam shaft, the spring and the sealing ball, in the normal state, the spring can push the sealing ball all the time, when hydraulic pressure in the lower valve body exceeds elastic force of the spring, the sealing ball can be jacked open, and therefore the sealing ball is prevented from loosening. When temporary reverse flow is needed, the cam shaft can be rotated so that the cam shaft can eject the sealing ball open, and then the liquid between the upper valve body and the lower valve body can flow mutually without the elasticity of the spring. Therefore, the problem that the stop valve needs to be disassembled when temporary reverse flow is needed for maintenance or overhaul is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of globe valves, in particular to a double-flow anti-loosening globe valve. Background Technique

[0002] A globe valve is a valve used to control the flow of fluids. It stops or allows the medium to flow by moving the valve flap along the center line of the semi-circular valve seat. The opening and closing part of the globe valve is a plug-shaped valve flap, and the sealing surface is flat or conical. The valve flap moves linearly along the center line of the fluid. It mainly relies on the valve stem pressure to make the sealing surface of the valve flap closely fit with the sealing surface of the valve seat, thereby preventing the medium from flowing.

[0003] Conventional globe valves are also applied as check valves. The main function is to maintain the one-way flow of the pipeline. The pressure at the inlet is higher than the elastic force of the internal spring of the valve body to push open the sealing ball, enabling one-way flow. However, in some equipment, maintenance or repair requires temporary reverse flow, so the globe valve needs to be removed, which is very inconvenient. To solve this technical problem, the utility model proposes a double-flow anti-loosening globe valve. Content of the Utility Model

[0004] The main purpose of the utility model is to provide a double-flow anti-loosening globe valve, which can effectively solve the problems mentioned in the background technique.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] The double-flow anti-loosening globe valve includes a lower valve body. An upper valve body is arranged above the lower valve body. A camshaft is arranged inside the lower valve body. A spring and a sealing ball are arranged inside the upper valve body.

[0007] Preferably, an inlet and an outlet are fixedly installed on the inner side of the lower valve body. An inlet pipe is threadedly connected to the inner wall of the inlet. A threaded sleeve is fixedly installed on the inner top wall of the lower valve body at the outlet.

[0008] The inner wall of the threaded sleeve is threadedly connected to the outer surface of the upper valve body. A sealing ring is fixedly installed on the inner wall of the upper valve body. The inner wall of the sealing ring is in contact and close fit with the outer surface of the sealing ball. An outlet pipe is arranged inside the upper valve body.

[0009] Preferably, a rotating rod is rotatably connected to the inner wall of the lower valve body. The outer surface of the rotating rod is fixedly installed with the inner wall of the camshaft. A rotating plate is fixedly installed at one end of the rotating rod. The outer surface of the rotating plate is rotatably connected to a rotating shell. The outer surface of the rotating shell is fixedly installed with the outer surface of the lower valve body.

[0010] Preferably, a rotating cover is rotatably connected to the outer surface of the rotating shell. A groove is arranged inside the rotating cover.

[0011] Preferably, a flow-through frame is fixedly installed on the inner wall of the upper valve body, a transmission housing is fixedly installed on the inner wall of the flow-through frame, a transmission rod is slidably connected to the inner wall of the transmission housing, and the bottom end of the transmission rod is fixedly installed on the outer surface of the sealing ball.

[0012] Preferably, a bottom plate is slidably connected to the inner wall of the transmission housing, the inner wall of the bottom plate is fixedly installed on the outer surface of the transmission rod, a fixed sleeve is fixedly installed on the inner wall of the transmission housing, and a sliding sleeve is slidably connected to the outer surface of the fixed sleeve.

[0013] Preferably, a spring is sleeved on the outer surface of the sliding sleeve, and the top end of the spring is fixedly installed on the inner top wall of the sliding sleeve.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] In the utility model, through the cooperation among the lower valve body, the upper valve body, the camshaft, the spring and the sealing ball, in the normal state, the spring can always push the sealing ball. When the hydraulic pressure in the lower valve body exceeds the elastic force of the spring, the sealing ball will be pushed open, so that the liquid in the lower valve body enters the upper valve body to maintain unidirectional flow. However, when temporary reverse flow is needed, the camshaft can be rotated so that the camshaft can push open the sealing ball, and thus the elastic force of the spring can be directly ignored, enabling the liquid between the upper valve body and the lower valve body to flow mutually, thereby solving the problem that the stop valve needs to be removed when temporary reverse flow is required for maintenance or repair.

[0016] In the utility model, through the cooperation among the sliding sleeve, the sealing ball, the spring, the bottom plate and the fixed sleeve, the spring can push the sliding sleeve or the bottom plate. Thus, when the air above the sliding sleeve leaks and the air pressure decreases, the spring can replace the role of the air pressure to push the bottom plate, and further the service life of the spring can be shortened and the overall service life of the equipment can be prolonged. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the double-flow anti-loosening stop valve of the utility model;

[0018] Figure 2 is another perspective schematic diagram of the overall structure of the double-flow anti-loosening stop valve of the utility model;

[0019] Figure 3 is a schematic diagram of the overall internal structure of the double-flow anti-loosening stop valve of the utility model;

[0020] Figure 4 is a schematic diagram of the internal structure of the transmission housing of the double-flow anti-loosening stop valve of the utility model;

[0021] Figure 5Schematic diagram of the open state of the rotary cover of the double-flow anti-loosening stop valve of the present utility model.

[0022] In the figure: 1. Lower valve body; 2. Upper valve body; 3. Camshaft; 4. Spring; 5. Sealing ball; 6. Inlet port; 7. Outlet port; 8. Inlet pipe; 9. Threaded sleeve; 10. Sealing ring; 11. Outlet pipe; 12. Rotary rod; 13. Rotary plate; 14. Rotary shell; 15. Rotary cover; 16. Groove; 17. Flow-through frame; 18. Transmission shell; 19. Transmission rod; 20. Bottom plate; 21. Fixed sleeve; 22. Sliding sleeve. Specific embodiments

[0023] In order to make the technical means, creative features, achieved purposes and functions of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] As Figures 1-5 shown, the double-flow anti-loosening stop valve includes a lower valve body 1, an upper valve body 2 is arranged above the lower valve body 1, a camshaft 3 is arranged inside the lower valve body 1, a spring 4 and a sealing ball 5 are arranged inside the upper valve body 2. In the normal state, the spring 4 can always push the sealing ball 5. When the hydraulic pressure in the lower valve body 1 exceeds the elastic force of the spring 4, the sealing ball 5 will be pushed open, so that the liquid in the lower valve body 1 enters the upper valve body 2 to maintain unidirectional flow. However, when temporary reverse flow is required, the camshaft 3 can be rotated so that the camshaft 3 can push open the sealing ball 5, and then the elastic force of the spring 4 can be directly ignored, enabling the liquid between the upper valve body 2 and the lower valve body 1 to flow mutually, thus solving the problem that the stop valve needs to be removed when maintenance or repair requires temporary reverse flow. An inlet port 6 and an outlet port 7 are fixedly installed on the inner side of the lower valve body 1. The inner wall of the inlet port 6 is threadedly connected with an inlet pipe 8. A threaded sleeve 9 is fixedly installed on the inner top wall of the lower valve body 1 at the outlet port 7. The inner wall of the threaded sleeve 9 is threadedly connected with the outer surface of the upper valve body 2. A sealing ring 10 is fixedly installed on the inner wall of the upper valve body 2. The inner wall of the sealing ring 10 is in contact with and closely adheres to the outer surface of the sealing ball 5. An outlet pipe 11 is provided inside the upper valve body 2. Through the inlet pipe 8, liquid can enter the lower valve body 1, and the liquid entering the lower valve body 1 can enter the upper valve body 2 through the outlet port 7 and flow upward through the outlet pipe 11.

[0025] A rotary rod 12 is rotatably connected to the inner wall of the lower valve body 1. The outer surface of the rotary rod 12 is fixedly installed with the inner wall of the camshaft 3. One end of the rotary rod 12 is fixedly installed with a rotary plate 13. The outer surface of the rotary plate 13 is rotatably connected with a rotary shell 14. The outer surface of the rotary shell 14 is fixedly installed with the outer surface of the lower valve body 1. Protrusions are provided on the surface of the rotary plate 13. These protrusions can facilitate manual rotation of the rotary plate 13, enabling the rotary plate 13 to drive the camshaft 3 through the rotary rod 12, so that the camshaft 3 can lift the sealing ball 5 or fall off from the sealing ball 5.

[0026] A rotary cover 15 is rotatably connected to the outer surface of the rotary shell 14. A groove 16 is formed on the inner side of the rotary cover 15. When the rotary cover 15 is closed, it can closely adhere to the rotary shell 14. The groove 16 can buckle the protrusion on the rotary plate 13, preventing the camshaft 3 in the lower valve body 1 from moving, thereby avoiding the camshaft 3 falling off the sealing ball 5 due to the push of the liquid.

[0027] A flow-through frame 17 is fixedly installed on the inner wall of the upper valve body 2. A transmission shell 18 is fixedly installed on the inner wall of the flow-through frame 17. A transmission rod 19 is slidably connected to the inner wall of the transmission shell 18. The bottom end of the transmission rod 19 is fixedly installed on the outer surface of the sealing ball 5. When the transmission rod 19 moves up and down, it can drive the sealing ball 5 to move up and down. The flow-through clamp enables the liquid entering the upper valve body 2 from the lower valve body 1 to bypass the transmission shell 18 through the flow-through clamp and flow upward to the outflow pipe 11.

[0028] A bottom plate 20 is slidably connected to the inner wall of the transmission shell 18. The inner wall of the bottom plate 20 is fixedly installed on the outer surface of the transmission rod 19. A fixed sleeve 21 is fixedly installed on the inner wall of the transmission shell 18. A sliding sleeve 22 is slidably connected to the outer surface of the fixed sleeve 21. The inside of the transmission shell 18 above the sliding sleeve 22 is filled with gas at a relatively high pressure. An air vent hole is formed inside the fixed sleeve 21, which can rely on air pressure to push the sliding sleeve 22, enabling the sliding sleeve 22 to push the bottom plate 20, and then driving the sealing ball 5 to move downward through the bottom plate 20 and the transmission rod 19.

[0029] A spring 4 is sleeved on the outer surface of the sliding sleeve 22. The top end of the spring 4 is fixedly installed on the inner top wall of the sliding sleeve 22. The spring 4 can push the sliding sleeve 22 or the bottom plate 20. Thus, when the air above the sliding sleeve 22 leaks and the air pressure decreases, the spring 4 can replace the role of the air pressure to push the bottom plate 20, thereby being able to shorten the usage time of the spring 4 and extend the overall service life of the device.

[0030] The above shows and describes the basic principles, main features, and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. Double-flow anti-loosening stop valve, characterized in that: It includes a lower valve body (1), an upper valve body (2) is arranged above the lower valve body (1), a camshaft (3) is arranged inside the lower valve body (1), a spring (4) and a sealing ball (5) are arranged inside the upper valve body (2), an inlet port (6) and an outlet port (7) are fixedly installed on the inner side of the lower valve body (1), an inlet pipe (8) is threadedly connected to the inner wall of the inlet port (6), a threaded sleeve (9) is fixedly installed on the inner top wall of the lower valve body (1) at the outlet port (7), the inner wall of the threaded sleeve (9) is threadedly connected to the outer surface of the upper valve body (2), a sealing ring (10) is fixedly installed on the inner wall of the upper valve body (2), the inner wall of the sealing ring (10) is in contact and close fit with the outer surface of the sealing ball (5), an outlet pipe (11) is arranged inside the upper valve body (2), a rotating rod (12) is rotatably connected to the inner wall of the lower valve body (1), the outer surface of the rotating rod (12) is fixedly installed with the inner wall of the camshaft (3), a rotating plate (13) is fixedly installed at one end of the rotating rod (12), the outer surface of the rotating plate (13) is rotatably connected to a rotating shell (14), and the outer surface of the rotating shell (14) is fixedly installed with the outer surface of the lower valve body (1).

2. The double-flow anti-loosening stop valve according to claim 1, characterized in that: A rotating cover (15) is rotatably connected to the outer surface of the rotating shell (14), and a groove (16) is arranged inside the rotating cover (15).

3. The double-flow anti-loosening stop valve according to claim 1, characterized in that: A flow-through frame (17) is fixedly installed on the inner wall of the upper valve body (2), a transmission shell (18) is fixedly installed on the inner wall of the flow-through frame (17), a transmission rod (19) is slidably connected to the inner wall of the transmission shell (18), and the bottom end of the transmission rod (19) is fixedly installed with the outer surface of the sealing ball (5).

4. The double-flow anti-loosening stop valve according to claim 3, wherein: A bottom plate (20) is slidably connected to the inner wall of the transmission shell (18), the inner wall of the bottom plate (20) is fixedly installed with the outer surface of the transmission rod (19), a fixed sleeve (21) is fixedly installed on the inner wall of the transmission shell (18), and a sliding sleeve (22) is slidably connected to the outer surface of the fixed sleeve (21).

5. The double-flow anti-loosening stop valve according to claim 4, wherein: The outer surface of the sliding sleeve (22) is sleeved with a spring (4), and the top end of the spring (4) is fixedly installed with the inner top wall of the sliding sleeve (22).

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