Leakage-proof structure of stop valve

Abstract

The utility model relates to the technical field of stop valves, in particular to a stop valve leakage-proof structure which comprises a valve seat, a valve rod in threaded connection with the valve seat, a valve element arranged at one end of the bottom of the valve rod, a hand wheel fixedly connected with the top of the valve rod, a chamfer arranged on the valve seat, and a leakage-proof plate fixedly connected with one end of the bottom of the valve element. A plurality of through holes are formed in the leakage-proof plate, an annular groove is formed in the chamfer, a sealing gasket is arranged in the annular groove, and the leakage-proof plate and the chamfer are connected through a clamping mechanism. By arranging the clamping mechanism, the valve element and the valve seat are detachably connected, it can be guaranteed that the valve keeps good sealing performance in the long-term use process, leakage caused by abrasion or corrosion is prevented, the service life of the valve is prolonged, the maintenance frequency is reduced, fluid leakage is prevented, and therefore faults or disastrous accidents of a system are avoided; and meanwhile, frequent maintenance and replacement caused by leakage are reduced, the maintenance cost of an enterprise is reduced, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of stop valve, concretely is a stop valve leak protection structure. BACKGROUND

[0002] As an important regulating and closing element in fluid control systems, stop valves are widely used in fields such as petroleum, chemical industry, power, water treatment, etc. The main function of a stop valve is to control the flow of fluid or completely cut off the flow of fluid by adjusting the degree of contact between the valve core and the valve seat.

[0003] Firstly, traditional stop valves often leak due to incomplete contact or wear between the valve seat and the valve core. After a long period of use, the contact surface between the valve seat and the valve core is prone to form gaps due to wear, corrosion or seal failure, resulting in leakage of liquid or gas. Such leakage not only causes resource waste and increases production cost, but also may pose a threat to the environment and the safety of operators.

[0004] Secondly, the sealing performance of traditional stop valves is easily affected when facing high pressure, high temperature or corrosive fluids, especially in long-term operation or frequent opening and closing conditions, the sealing surface of the valve will gradually be worn or corroded, resulting in more serious leakage. No solutions have been proposed to address the related technical problems. SUMMARY

[0005] To overcome the above technical problems existing in the prior art, the utility model provides a stop valve leak protection structure to ensure that the valve maintains good sealing performance during long-term use, prevent leakage caused by wear or corrosion, prolong the service life of the valve, reduce maintenance frequency, prevent fluid leakage, thereby avoiding system failure or catastrophic accidents, while also reducing frequent maintenance and replacement due to leakage, reducing maintenance costs for enterprises and improving production efficiency.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a stop valve leak protection structure, comprising a valve seat, a valve stem is threadedly connected to the valve seat, a valve core is arranged at the bottom of one end of the valve stem, a hand wheel is fixedly connected to the top of the valve stem, a chamfer is arranged on the valve seat, a leak protection plate is fixedly connected to the bottom of one end of the valve core, a plurality of through holes are formed in the leak protection plate, an annular groove is formed in the chamfer, a sealing gasket is arranged in the annular groove, and the leak protection plate and the chamfer are connected through a clamping mechanism.

[0007] The clamping mechanism comprises a base, a movable column, a spring, a connecting column, a clamping plate, a top plate and a movable block, a plurality of receiving grooves are formed in the inside of the through hole, a baffle is arranged in the receiving groove, one end of the movable column is connected with the baffle, the other end of the movable column is connected with the clamping plate, the spring is arranged in the receiving groove and is fixedly connected with the clamping plate and the receiving groove at both ends, the base is fixedly installed in the annular groove, the base is connected with the top plate through the connecting column, and the movable block is sleeved on the connecting column and movably connected with the connecting column.

[0008] Preferably, the end of the clamping plate away from the movable column is provided in a slope surface structure, and the inclination angle is 30°-80°.

[0009] Preferably, the top end of the movable block is provided in an increasing arrangement from top to bottom, and the bottom end of the movable block is provided in a decreasing arrangement from top to bottom.

[0010] Preferably, the bottom end of the top plate is provided with a placing groove.

[0011] Preferably, the baffle, the movable column and the clamping plate are provided in an integrated structure.

[0012] Preferably, one end of the valve seat is provided with a water inlet, and the other end of the valve seat is provided with a water outlet.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] (1) the utility model discloses a stop valve leak-proof structure, the chamfer on the valve core and the valve seat is connected through the clamping mechanism, can ensure that the valve keeps good sealing property in long -term use, prevents the leakage caused by abrasion or corrosion, prolongs the service life of the valve, reduces the maintenance frequency, prevents fluid leakage, thereby avoiding system failure or catastrophic accident, still reduce the maintenance and replacement frequently because of leakage simultaneously, reduce the maintenance cost of enterprise, improve production efficiency;

[0015] (2) the utility model discloses a stop valve leak-proof structure, the sealing pad is set up on the chamfer, effectively improves the sealing effect of the valve core and the valve seat, effectively fills the tiny gap between the valve core and the valve seat, ensures that there is no leakage when the valve is closed, the sealing pad as buffer material can reduce direct contact, reduce friction and abrasion, prolong the service life of the valve, can effectively prevent the incomplete sealing condition in the opening and closing process simultaneously, guarantee the reliability and stability of the valve, especially under the complex working environment, can ensure the accuracy and safety of fluid control, also effectively prevent the damage of the valve seat and the valve core, thereby reducing the maintenance frequency and replacement cost of the valve. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the whole structure schematic view of the utility model.

[0017] Figure 2 for Figure 1 A magnified structural diagram of part A;

[0018] Figure 3 This is a schematic diagram of the locking mechanism of this utility model;

[0019] Figure 4 This is a schematic diagram of the top plate of this utility model. Attached image description:

[0021] 1. Valve seat; 2. Valve stem; 3. Valve core; 4. Handwheel; 5. Chamfer; 6. Leak-proof plate; 7. Through hole; 8. Annular groove; 9. Sealing gasket; 10. Base; 11. Movable column; 12. Spring; 13. Connecting column; 14. Clamping plate; 15. Top plate; 16. Baffle; 17. Movable block; 18. Inlet; 19. Outlet. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0023] Example

[0024] Please see Figures 1-4 This utility model proposes a technical solution for a leak-proof structure of a stop valve: A leak-proof structure of a stop valve includes a valve seat 1, specifically, the valve seat 1 is made of metal material, a valve stem 2 is threadedly connected to the valve seat 1, a valve core 3 is provided at the bottom end of the valve stem 2, and a handwheel 4 is fixedly connected to the top of the valve stem 2. Specifically, by manually rotating the handwheel 4, the valve stem 2 fixedly connected to it rotates clockwise or counterclockwise, and when the valve stem 2 rotates, it drives the valve core 3 movably connected to it to move up and down within the valve seat 1. A chamfer 5 is provided on the valve seat 1, and a leak-proof plate 6 is fixedly connected to the bottom end of the valve core 3. Specifically, the leak-proof plate 6 can effectively prevent fluid leakage. The leak-proof plate 6 has several through holes 7, and an annular groove 8 is provided on the chamfer 5. A sealing gasket 9 is provided inside the annular groove 8. Specifically, the sealing gasket 9 is made of rubber material and has elasticity, which effectively improves the sealing effect. The leak-proof plate 6 and the chamfer 5 are connected by a locking mechanism.

[0025] The locking mechanism includes a base 10, a movable column 11, a spring 12, a connecting column 13, a locking plate 14, a top plate 15, and a movable block 17. The through hole 7 has several storage slots inside, each containing a baffle 16. One end of the movable column 11 is connected to the baffle 16, and the other end is connected to the locking plate 14. The spring 12 is located within the storage slots, with both ends fixedly connected to the locking plate 14 and the storage slots, respectively. The base 10 is fixedly installed within the annular groove 8 and is connected to the top plate 15 via the connecting column 13. The movable block 17 is sleeved on the connecting column 13 and movably connected to it. Specifically, when the valve core 3 moves downwards, it drives the locking plate 14 downwards. When the locking plate 14 contacts the top plate 15... Under the action of spring 12, it first moves to one side of the receiving groove and is stored in the receiving groove. When the clamping plate 14 moves between the top plate 15 and the movable block 17, under the action of spring 12, the clamping plate 14 extends outward, which can fix the valve core 3 to the chamfer 5 on the valve seat 1. When fluid needs to flow, the valve core 3 is first moved downward, driving the clamping plate 14 to move below the movable block 17. Then the valve core 3 is moved upward, driving the clamping plate 14 to move upward. When the clamping plate 14 moves, it drives the movable block 17 to be stored in the top plate 15. The clamping plate 14 abuts against the top plate 15. Under the action of spring 12, the clamping plate 14 is stored in the receiving groove and moves to the top plate 15, which can realize the disassembly of the leak-proof plate 6 and the chamfer 5.

[0026] Please see Figure 2 As shown, furthermore, the end of the card plate 14 away from the movable column 11 is set with a sloping structure, with an inclination angle of 30° to 80°.

[0027] In this embodiment, the card plate 14 is easy to move, improving its practicality.

[0028] Please see Figures 2-3 As shown, the top end of the movable block 17 is arranged in an increasing manner from top to bottom, and the bottom end of the movable block 17 is arranged in a decreasing manner from top to bottom.

[0029] Please see Figure 4 As shown, a placement groove is further provided at one bottom end of the top plate 15.

[0030] In this embodiment, the placement slot can accommodate the movable block 17.

[0031] Please see Figure 2 As shown, the baffle 16, the movable column 11, and the clamping plate 14 are all integrated structures.

[0032] In this embodiment, the robustness of the baffle 16, the movable column 11, and the retaining plate 14 is improved.

[0033] Please see Figure 1As shown, one end of the valve seat 1 is provided with a water inlet 18, and the other end of the valve seat 1 is provided with a water outlet 19.

[0034] In this embodiment, the fluid enters through the inlet 18 and exits through the outlet 19.

[0035] The working principle of this utility model:

[0036] When the shut-off valve needs to stop the fluid, the valve core 3 is connected to the chamfer 5 on the valve seat 1 through the locking mechanism. The handwheel 4 is manually turned clockwise to move the valve core 3, which is fixedly connected to it, downward. When the valve core 3 moves, it drives the anti-leakage plate 6 to move downward, thereby moving the locking plate 14 on the anti-leakage plate 6 downward. When the locking plate 14 contacts the top plate 15, it moves to one side of the storage groove under the action of the spring 12 and is stored in the storage groove. When the locking plate 14 moves between the top plate 15 and the movable block 17, it extends outward under the action of the spring 12, so that the valve core 3 is fixed to the chamfer 5 on the valve seat 1. The sealing gasket 9 can effectively improve the sealing effect.

[0037] When fluid needs to flow, first rotate the valve core 3 clockwise to move it downward, causing the clamping plate 14 to move below the movable block 17. Then rotate the valve core 3 counterclockwise to move it upward, causing the clamping plate 14 to move upward. When the clamping plate 14 moves, it causes the movable block 17 to be stored in the top plate 15. The clamping plate 14 abuts against the top plate 15. Under the action of the spring 12, the clamping plate 14 is stored in the storage groove and moves above the top plate 15, thus realizing the disassembly of the leak-proof plate 6 and the chamfer 5.

[0038] This invention enables the valve seat 1 to maintain good sealing performance during long-term use, preventing leakage caused by wear or corrosion, effectively extending the service life of the valve, reducing maintenance frequency, reducing fluid resource waste, protecting resources and the environment, preventing fluid leakage, thereby avoiding system failures or catastrophic accidents, and also reducing frequent maintenance and replacement due to leakage, lowering enterprise maintenance costs and improving production efficiency.

[0039] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A leak-proof structure for a stop valve, comprising a valve seat (1), a valve stem (2) threadedly connected to the valve seat (1), a valve core (3) provided at one bottom end of the valve stem (2), and a handwheel (4) fixedly connected to the top of the valve stem (2), characterized in that, The valve seat (1) is provided with a chamfer (5), and a leak-proof plate (6) is fixedly connected to one bottom end of the valve core (3). The leak-proof plate (6) is provided with several through holes (7), and an annular groove (8) is provided on the chamfer (5). A sealing gasket (9) is provided inside the annular groove (8). The leak-proof plate (6) and the chamfer (5) are connected by a locking mechanism. The locking mechanism includes a base (10), a movable column (11), a spring (12), a connecting column (13), a locking plate (14), a top plate (15), and a movable block (17). The through hole (7) has several storage slots inside, and a baffle (16) is provided inside the storage slot. One end of the movable column (11) is connected to the baffle (16), and the other end of the movable column (11) is connected to the locking plate (14). The spring (12) is set in the storage slot, and its two ends are fixedly connected to the locking plate (14) and the storage slot, respectively. The base (10) is fixedly installed in the annular groove (8). The base (10) is connected to the top plate (15) through the connecting column (13). The movable block (17) is sleeved on the connecting column (13) and is movably connected to the connecting column (13).

2. The anti-leakage structure for a shut-off valve according to claim 1, characterized in that: The end of the card plate (14) away from the movable column (11) is set with a sloping structure, with an inclination angle of 30° to 80°.

3. The anti-leakage structure for a shut-off valve according to claim 1, characterized in that: The top end of the movable block (17) is arranged in an increasing manner from top to bottom, and the bottom end of the movable block (17) is arranged in a decreasing manner from top to bottom.

4. The anti-leakage structure for a shut-off valve according to claim 1, characterized in that: A placement groove is provided at one bottom end of the top plate (15).

5. The anti-leakage structure for a shut-off valve according to claim 1, characterized in that: The baffle (16), movable column (11), and clamping plate (14) are all integrated structures.

6. The anti-leakage structure for a shut-off valve according to claim 1, characterized in that: One end of the valve seat (1) is provided with a water inlet (18), and the other end of the valve seat (1) is provided with a water outlet (19).

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