Ball valve double-seal redundancy device

Abstract

The utility model discloses a ball valve double-sealing redundant device which comprises a ball valve assembly, a sealing assembly is connected in the ball valve assembly in a sliding mode, a detection assembly is fixed to one side of the ball valve assembly, a driving assembly is fixed to the top of the ball valve assembly and comprises a housing, the housing is fixed to the top of the ball valve assembly, and a motor is fixed to the top of the housing. A first gear is fixed to the output shaft end of the motor, one side of the first gear is meshed with a rack, the rack is slidably connected into the housing, one side of the rack is meshed with a second gear, a first valve rod is fixed into the second gear, a second valve ball is fixed to one end of the valve rod, a third gear is rotationally connected into the housing, a second valve rod is fixed into the third gear, and the ball valve assembly comprises a shell. According to the utility model, through the driving of one motor, the rack is sequentially meshed with the second gear and the third gear, so that the purpose of controlling a plurality of valve balls with fewer driving parts is achieved, thereby reducing wire harnesses and background program instructions, and further reducing the manufacturing cost.

Description

Technical Field

[0001] The utility model relates to the technical field of ball valve redundancy, in particular to a ball valve double-seal redundancy device. Background Art

[0002] Valve redundancy refers to the introduction of two or more valves with the same principle, structure or function in a fluid conveying system to serve as backup for each other, so as to ensure that the system can continue to operate when a valve fails. The main purpose of the ball valve is to block the flow of fluids. Therefore, ball valves are usually the first choice for restricting fluid flow. However, after long-term or frequent use, the ball valve is prone to not rotating with the valve stem. Therefore, redundancy can effectively block the flow of fluids.

[0003] Chinese Patent No. CN221401933U provides a solenoid valve with a dual redundant structure, which relates to the field of solenoid valves. The utility model includes a solenoid valve body, a casing is provided at the bottom of the solenoid valve body, a support rod is provided inside the casing, an adjustment mechanism is provided at the bottom of the casing, the adjustment mechanism includes a mounting block, a cavity is provided inside the mounting block, a sleeve is provided on the outside of the mounting block, and a sliding mechanism is provided at the bottom of the support rod. The utility model uses the mounting block, the sleeve, the adjustment block and the anti-sliding block. When the manual switch of the solenoid valve needs to be adjusted, first, the adjustment rod is manually rotated to drive the mounting block to rotate. At the same time, the mounting block and the outer sleeve are threadedly rotated to push the mounting block upward, and then the support rod is moved upward. The manual switch of the solenoid valve is adjusted by the movement of the support rod, thereby improving the convenience of the manual switch of the solenoid valve and preventing the operator from accidentally touching it.

[0004] A double-seal redundant device for a ball valve in the prior art has the following problems: although it can improve the convenience of manually opening and closing the solenoid valve and prevent operators from accidentally touching it, the existing redundant device is mostly two separate valve components that are directly fixed together without a pipe. Although redundancy is achieved, each valve requires a corresponding power device, which requires a corresponding increase in the connected wiring harness and background program, thereby increasing manufacturing costs.

[0005] Therefore, it is urgent to design a ball valve double seal redundant device to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to solve the shortcomings in the prior art and to propose a double-seal redundant device for a ball valve.

[0007] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0008] A ball valve double seal redundant device includes a ball valve assembly, a sealing assembly is slidably connected inside the ball valve assembly, a detection assembly is fixed to one side of the ball valve assembly, a drive assembly is fixed to the top of the ball valve assembly, the drive assembly includes a cover shell, the cover shell is fixed to the top of the ball valve assembly, a motor is fixed to the top of the cover shell, a gear 1 is fixed to the output shaft end of the motor, a rack is meshed with one side of the gear 1, the rack is slidably connected to the inside of the cover shell, a gear 2 is meshed with one side of the rack, a valve stem 1 is fixed inside the gear 2, a valve ball 2 is fixed to the end of the valve stem 1, a gear 3 is rotatably connected inside the cover shell, and a valve stem 2 is fixed inside the gear 3.

[0009] Furthermore, the ball valve assembly includes a shell, a water inlet pipe is fixed on one side of the shell, and a water outlet pipe is fixed on the other side of the shell.

[0010] Furthermore, a valve ball 1 is rotatably connected to the interior of the shell, and a slot is provided on the top of the valve ball 1.

[0011] Furthermore, the sealing assembly includes a sealing sleeve, which is slidably connected to the inside of the shell, a sealing sheet is fixed on one side of the sealing sleeve, and a sealing ring is sleeved on one side of the sealing sleeve.

[0012] Furthermore, a guide rod is fixed to one side of the sealing sleeve, and a spring 1 is fixed to the end of the guide rod.

[0013] Furthermore, the detection component includes a sleeve shell, which is fixed to one side of the outer shell. A top frame is slidably connected to the inside of the sleeve shell, and a spring 2 is fixed to the end of the top frame.

[0014] Furthermore, a pressure sensor is fixed inside the housing, and a wiring harness is fixed on one side of the pressure sensor.

[0015] The beneficial effects of the utility model are:

[0016] 1. Through the setting of the driving component, the motor drives the gear 1 to rotate, so that the rack can move, so that the gear 2 drives the valve stem 1 to rotate, so that the valve ball 2 is closed. When the valve ball 2 is not completely closed, the detection component can detect it through the different changes in the pressure sensor, and then the motor will start, so that the rack drives the gear 3 to rotate, so that the valve ball 1 is closed, thereby achieving the purpose of blocking the fluid flow, so that the purpose of controlling the two ball valves can be achieved with one motor, thereby reducing the corresponding instructions of the wiring harness and the background program.

[0017] 2. By setting up a detection component, taking advantage of the fact that the valve ball has a through hole, and the length of the through hole must be smaller than the diameter of the valve ball, through this change, when the valve ball is in the open state, the value applied to the pressure sensor by the top frame extrusion spring 2 is inconsistent with the value when the valve ball is in the closed state, so it can be judged whether the valve ball is completely closed, and thus it is proved that the valve stem and the valve ball no longer rotate synchronously. Therefore, when the background program receives a inconsistent value, it will continue to make the motor run, so that the valve ball will be closed.

[0018] 3. By setting up the sealing assembly and the setting of the sealing ring, the fluid can be prevented from flowing through the gap between the sealing sleeve and the outer shell. The spring is used to push the guide rod so that the sealing sheet on the sealing sleeve can be close to the valve ball, thereby preventing the fluid from flowing through the gap between the sealing sleeve and the valve ball after the valve ball is closed.

[0019] 4. By setting up a rack and taking advantage of the different positions of the teeth on the rack, the rack drives gear two and gear three to rotate in sequence, so that the redundant device can be controlled by only one motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of a double-seal redundant device for a ball valve proposed in the utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of a double-seal redundant device for a ball valve proposed in the present invention;

[0022] Figure 3 This is a partially enlarged schematic diagram of a double-seal redundant device for a ball valve proposed in the present invention;

[0023] Figure 4 This is a schematic diagram of a drive assembly of a ball valve double seal redundancy device proposed in the present invention.

[0024] In the figure: 1. Ball valve assembly; 2. Outer casing; 3. Water inlet pipe; 4. Water outlet pipe; 5. Valve ball 1; 6. Slot; 7. Sealing assembly; 8. Sealing sleeve; 9. Sealing sheet; 10. Sealing ring; 11. Guide rod; 12. Spring 1; 13. Detection assembly; 14. Housing; 15. Top frame; 16. Spring 2; 17. Pressure sensor; 18. Wiring harness; 19. Drive assembly; 20. Cover; 21. Motor; 22. Gear 1; 23. Rack; 24. Gear 2; 25. Valve stem 1; 26. Valve ball 2; 27. Gear 3; 28. Valve stem 2. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a central component. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are for the purpose of describing specific embodiments only and are not intended to limit this invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] Please also see Figures 1 to 4 A ball valve double seal redundant device includes a ball valve assembly 1, a sealing assembly 7 is slidably connected inside the ball valve assembly 1, a detection assembly 13 is fixed on one side of the ball valve assembly 1, a drive assembly 19 is fixed on the top of the ball valve assembly 1, and the drive assembly 19 includes a cover 20, the cover 20 is fixed on the top of the ball valve assembly 1, a motor 21 is fixed on the top of the cover 20, a gear 22 is fixed on the output shaft end of the motor 21, a rack 23 is meshed with one side of the gear 22, and the rack 23 has teeth at different positions. The rack 23 is first connected to the Gear 2 24 is engaged, and then when it is not engaged with gear 2 24 , it is engaged with gear 3 27 . The rack 23 is slidably connected to the inside of the cover 20 , and the cover 20 plays a protective role. One side of the rack 23 is engaged with gear 24 , and a valve stem 1 25 is fixed inside the gear 2 24 . The valve stem 1 25 plays a transition connection role. A valve ball 2 26 is fixed to the end of the valve stem 1 25 . The cover 20 is rotatably connected to the inside of the gear 3 27 , and a valve stem 2 28 is fixed inside the gear 3 27 . The valve stem 2 28 is fixed to the valve ball 1 5 .

[0029] Furthermore, the ball valve assembly 1 includes an outer shell 2, an inlet pipe 3 is fixed to one side of the outer shell 2, and an outlet pipe 4 is fixed to the other side of the outer shell 2. A valve ball 5 is rotatably connected inside the outer shell 2, and a slot 6 is provided on the top of the valve ball 5. The slot 6 facilitates the insertion of the valve stem 28 into the interior of the valve ball 5 for fixed connection.

[0030] Furthermore, the sealing assembly 7 includes a sealing sleeve 8, which plays a supporting role. The sealing sleeve 8 is slidably connected to the inside of the outer shell 2. A sealing sheet 9 is fixed to one side of the sealing sleeve 8. The sealing sheet 9 and the sealing ring 10 both play the role of filling the gap. A sealing ring 10 is sleeved on one side of the sealing sleeve 8. A guide rod 11 is fixed to one side of the sealing sleeve 8. A spring 12 is fixed to the end of the guide rod 11. The spring 12 uses elastic force to ensure that the sealing sheet 9 on the sealing sleeve 8 is always tightly fitted with the outer shell 2.

[0031] Furthermore, the detection component 13 includes a shell 14, which is fixed on one side of the outer shell 2. A top frame 15 is slidably connected to the inside of the shell 14, and the top frame 15 plays a transition transmission role. A spring 2 16 is fixed to the end of the top frame 15. The spring 2 16 can make the pressure sensor 17 clearly detect the change of the rebound force. A pressure sensor 17 is fixed inside the shell 14. The pressure sensor 17 determines whether the valve ball is closed by detecting the pressure. A wiring harness 18 is fixed on one side of the pressure sensor 17, and the wiring harness 18 plays the role of power and data transmission.

[0032] Working principle: When in use, when the motor 21 drives the gear 1 22 to rotate, the rack 23 will drive the gear 2 24 to rotate, thereby closing the valve ball 2 26 through the valve stem 1 25. At this time, because the through hole of the valve ball 2 26 is facing the top frame 15, the elastic force of the spring 2 16 is released to a certain extent, so that the pressure on the pressure sensor 17 is reduced to a certain value. Therefore, the background system can judge that the valve ball 2 26 is completely closed. On the contrary, after the motor 21 drives the gear 1 22 to rotate for a certain period of time, the top frame 15 does not move or the displacement is too small, then the value detected by the pressure sensor 17 will not change too much. At this time, the background program can judge that there is a problem with the valve ball 2 26, so it will instruct the motor 21 to continue to rotate, so that the rack 23 engages with the gear 3 27, thereby driving the valve ball 1 5 to close through the valve stem 2 28. The detection component 13 corresponding to the valve ball 1 5 can judge whether the valve ball 1 5 is completely closed, thereby completing the blocking of the fluid flow.

[0033] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A ball valve double seal redundant device, comprising a ball valve assembly (1), characterized in that: The ball valve assembly (1) is slidably connected to a sealing assembly (7), a detection assembly (13) is fixed to one side of the ball valve assembly (1), a driving assembly (19) is fixed to the top of the ball valve assembly (1), and the driving assembly (19) includes a cover (20), the cover (20) is fixed to the top of the ball valve assembly (1), a motor (21) is fixed to the top of the cover (20), a gear 1 (22) is fixed to the output shaft end of the motor (21), a rack (23) is meshed on one side of the gear 1 (22), the rack (23) is slidably connected to the inside of the cover (20), a gear 2 (24) is meshed on one side of the rack (23), a valve stem 1 (25) is fixed to the inside of the gear 2 (24), a valve ball 2 (26) is fixed to the end of the valve stem 1 (25), a gear 3 (27) is rotatably connected to the inside of the cover (20), and a valve stem 2 (28) is fixed to the inside of the gear 3 (27).

2. A ball valve double seal redundancy device according to claim 1, characterized in that: The ball valve assembly (1) comprises a housing (2), a water inlet pipe (3) being fixed to one side of the housing (2), and a water outlet pipe (4) being fixed to the other side of the housing (2).

3. A ball valve double seal redundancy device according to claim 2, characterized in that: A valve ball (5) is rotatably connected to the interior of the housing (2), and a slot (6) is provided on the top of the valve ball (5).

4. A ball valve double seal redundancy device according to claim 2, characterized in that: The sealing assembly (7) comprises a sealing sleeve (8), the sealing sleeve (8) being slidably connected to the interior of the housing (2), a sealing sheet (9) being fixed to one side of the sealing sleeve (8), and a sealing ring (10) being sleeved on one side of the sealing sleeve (8).

5. A ball valve double seal redundancy device according to claim 4, characterized in that: A guide rod (11) is fixed to one side of the sealing sleeve (8), and a spring 1 (12) is fixed to the end of the guide rod (11).

6. A ball valve double seal redundancy device according to claim 2, characterized in that: The detection assembly (13) includes a casing (14), the casing (14) is fixed to one side of the outer shell (2), a top frame (15) is slidably connected inside the casing (14), and a second spring (16) is fixed to the end of the top frame (15).

7. A ball valve double seal redundancy device according to claim 6, characterized in that: A pressure sensor (17) is fixed inside the casing (14), and a wiring harness (18) is fixed on one side of the pressure sensor (17).

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