Clamping connection structure of ball valve

Abstract

The utility model discloses a clamping connection structure of a ball valve, which comprises a valve body, a valve seat, a ball body, a valve rod, a sealing assembly and a limiting component, the limiting component is used for preventing the valve rod from being rotated by mistake, the sealing assembly comprises a supporting ring, a sealing ring, a valve rod sleeve and a gasket, the supporting ring is arranged at the lower end of the valve seat, and the sealing ring is arranged at the lower end of the valve seat. The lower end of the supporting ring is fixedly connected with the inner wall of the valve body, a valve rod sleeve is arranged on the outer wall of the valve rod, a sealing ring is arranged between the valve rod sleeve and the valve rod, and a gasket is further arranged between the inner wall of the upper end of the valve rod sleeve and the valve rod. The whole sealing performance of the device is improved, the situation that due to long-time use of the device, the sealing performance is poor, and the service life of the device is affected is avoided, meanwhile, compared with traditional arrangement, even if the handle is touched by mistake, the valve rod cannot rotate, and misoperation on the ball valve can be prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of ball valves, and particularly relates to a clamping connection structure of a ball valve. Background Technique

[0002] A ball valve is a valve in which the closing member (ball) is driven by a valve stem and rotates around the axis of the ball valve. It can be used for the regulation and control of fluids. The hard-sealed V-type ball valve has a very strong shearing force between its V-type ball core and the metal valve seat with surfacing hard alloy, and is especially suitable for media containing fibers, tiny solid particles, etc. The multi-way ball valve can not only flexibly control the confluence, diversion, and flow direction switching of the medium on the pipeline, but also close any channel to connect the other two channels. The ball valve is divided into pneumatic ball valves, electric ball valves, and manual ball valves according to the driving mode, and the ball valve is widely used in industries such as petroleum refining, long-distance pipelines, chemical industry, papermaking, pharmaceuticals, water conservancy, electric power, municipal administration, and steel.

[0003] However, with long-term use, traditional ball valves are prone to leakage, resulting in poor sealing performance of the ball valves. Content of the Utility Model

[0004] The purpose of the utility model is to provide a clamping connection structure of a ball valve to solve the problems raised in the above background technique.

[0005] To solve the above technical problems, the utility model provides the following technical solution: A clamping connection structure of a ball valve, including a valve body, a valve seat, a ball, a valve stem, a sealing component, and a limiting component. The limiting component is used to prevent the valve stem from rotating by mistake. The sealing component includes a support ring, a sealing ring, a valve stem sleeve, and a gasket. A support ring is arranged at the lower end of the valve seat, and the lower end of the support ring is fixedly connected to the inner wall of the valve body. A valve stem sleeve is arranged on the outer wall of the valve stem, and a sealing ring is arranged between the valve stem sleeve and the valve stem. A gasket is also arranged between the upper inner wall of the valve stem sleeve and the valve stem.

[0006] In a preferred embodiment: The sealing ring is in the shape of an O-ring, and the gasket is made of a PTFE gasket.

[0007] In a preferred embodiment: The upper end of the valve body is connected to the valve seat through a support ring. The lower end of the valve stem is rotatably arranged in the valve body, and a ball is fixedly connected to the bottom end of the valve stem. The ball is rotatably arranged in the valve body and is movably arranged with the valve seat.

[0008] In a preferred embodiment: The limiting member includes a handle, a chute, a first clamping groove, a clamping post and a reinforcement member. Handles are rotatably connected to both sides of the valve stem. A chute is provided inside the handle. A clamping post is slidably connected inside the chute. A first clamping groove matching the clamping post is provided on the wall of the valve stem. A reinforcement member is provided between the clamping post and the inner wall of the chute for firmly connecting the handle and the valve stem.

[0009] In a preferred embodiment: The reinforcement member includes a clamping block, a second clamping groove and a sliding plate. Two symmetrically distributed sliding plates are slidably connected inside the clamping post. A plurality of second clamping grooves are equidistantly distributed on the inner wall of the handle. A spherical clamping block is rotatably connected to one end of the sliding plate close to the second clamping groove.

[0010] In a preferred embodiment: A return spring is fixedly connected between the sliding plate and the inner wall of the clamping post.

[0011] Compared with the prior art, the beneficial effects achieved by the present utility model are as follows:

[0012] Through the settings of the valve body, valve seat, sphere, valve stem and sealing assembly, the present utility model not only increases the firmness between the valve stem and the valve body, but also increases the firmness between the sphere and the valve body, thereby greatly increasing the overall sealing performance of the device, avoiding poor sealing performance caused by long-term use of the device and affecting the service life of the device. Also, through the detachable connection between the handle and the valve stem, it is not only convenient to rotate the valve stem, but also when the valve stem is not rotated, the handle and the valve stem are only rotatably connected. In this state, compared with the traditional setting where the handle and the valve stem are integrally formed, the valve stem of this device will not rotate even if the handle is accidentally touched, preventing misoperation of the ball valve. Description of the Drawings

[0013] The drawings are used to provide further understanding of the present utility model and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model. In the drawings:

[0014] Figure 1 is the overall structural schematic diagram of the present utility model;

[0015] Figure 2 is the overall sectional structural schematic diagram of the present utility model;

[0016] Figure 3 is the side structural schematic diagram of the reinforcement member of the present utility model;

[0017] In the figure: 1, valve body; 2, valve seat; 3, sphere; 4, valve stem; 5, support ring; 6, sealing ring; 7, valve stem sleeve; 8, gasket; 9, handle; 10, chute; 11, first clamping groove; 12, clamping post; 13, clamping block; 14, second clamping groove; 15, sliding plate; 16, return spring. Specific implementation mode

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0019] Please refer to Figures 1-3 , the present invention provides a technical solution: a clamping connection structure of a ball valve, including a valve body 1, a valve seat 2, a sphere 3, a valve stem 4, a sealing component and a limiting component. The limiting component is used to prevent the valve stem 4 from rotating by mistake. The sealing component includes a support ring 5, a sealing ring 6, a valve stem sleeve 7 and a gasket 8. A support ring 5 is arranged at the lower end of the valve seat 2. The lower end of the support ring 5 is fixedly connected to the inner wall of the valve body 1. A valve stem sleeve 7 is arranged on the outer wall of the valve stem 4. A sealing ring 6 is arranged between the valve stem sleeve 7 and the valve stem 4. A gasket 8 is also arranged between the upper end inner wall of the valve stem sleeve 7 and the valve stem 4.

[0020] The sealing ring 6 is in the shape of an O-ring, and the gasket 8 is made of a tetrafluoro gasket 8.

[0021] The upper end of the valve body 1 is connected to the valve seat 2 through a support ring 5. The lower end of the valve stem 4 is rotatably arranged in the valve body 1. The bottom end of the valve stem 4 is fixedly connected to a sphere 3. The sphere 3 is rotatably arranged in the valve body 1 and is movably arranged with the valve seat 2.

[0022] The limiting component includes a handle 9, a chute 10, a first clamping groove 11, a clamping post 12 and a reinforcement component. The two sides of the valve stem 4 are rotatably connected to a handle 9. A chute 10 is arranged in the handle 9. A clamping post 12 is slidably connected in the chute 10. A first clamping groove 11 matching the clamping post 12 is arranged on the wall body of the valve stem 4. A reinforcement component is arranged between the clamping post 12 and the inner wall of the chute 10 for the firm connection between the handle 9 and the valve stem 4.

[0023] The reinforcement component includes a clamping block 13, a second clamping groove 14 and a sliding plate 15. Two symmetrically distributed sliding plates 15 are slidably connected to the inner wall of the clamping post 12. A plurality of equally spaced second clamping grooves 14 are arranged on the inner wall of the handle 9. A spherical clamping block 13 is rotatably connected to one end of the sliding plate 15 close to the second clamping groove 14.

[0024] When in use, when the valve stem 4 needs to be rotated, the two handles 9 are pushed towards the valve stem 4 until they cannot be pushed any further. At this time, one end of the latch post 12 is caught in the first slot 11, and at the same time, the latch block 13 is caught in the second slot 14, which increases the fastening between the handle 9 and the valve stem 4.

[0025] A return spring 16 is fixedly connected between the inner wall of the slide plate 15 and the latch post 12. The setting of the return spring 16 facilitates the left and right movement of the latch block 13, which not only facilitates the insertion of the latch block 13 into the second slot 14, but also facilitates the movement of the latch post 12.

[0026] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A clamping connection structure for a ball valve, comprising a valve body (1), a valve seat (2), a ball (3), a valve stem (4), a sealing assembly and a limiting member, wherein the limiting member is used to prevent the valve stem (4) from being misrotated, and is characterized in that: The sealing assembly includes a support ring (5), a sealing ring (6), a valve stem sleeve (7), and a gasket (8). A support ring (5) is disposed at the lower end of the valve seat (2), and the lower end of the support ring (5) is fixedly connected to the inner wall of the valve body (1). A valve stem sleeve (7) is provided on the outer wall of the valve stem (4), a sealing ring (6) is provided between the valve stem sleeve (7) and the valve stem (4), and a gasket (8) is further provided between the upper inner wall of the valve stem sleeve (7) and the valve stem (4).

2. The clamping connection structure of a ball valve according to claim 1, characterized in that: The sealing ring (6) is in the shape of an O-ring, and the gasket (8) is made of a PTFE gasket (8).

3. The clamping connection structure of a ball valve according to claim 1, characterized in that: The upper end of the valve body (1) is connected to the valve seat (2) through a support ring (5). The lower end of the valve stem (4) is rotatably arranged in the valve body (1), and a sphere (3) is fixedly connected to the bottom end of the valve stem (4). The sphere (3) is rotatably arranged in the valve body (1) and is movably arranged with the valve seat (2).

4. The clamping connection structure of a ball valve according to claim 1, characterized in that: The limiting member includes a handle (9), a chute (10), a first clamping groove (11), a clamping post (12), and a reinforcing member. Handles (9) are rotatably connected to both sides of the valve stem (4). A chute (10) is provided in the handle (9), a clamping post (12) is slidably connected in the chute (10), and a first clamping groove (11) matching the clamping post (12) is provided on the wall body of the valve stem (4). A reinforcing member is provided between the clamping post (12) and the inner wall of the chute (10) for firmly connecting the handle (9) and the valve stem (4).

5. The clamping connection structure of a ball valve according to claim 4, characterized in that: The reinforcing member includes a clamping block (13), a second clamping groove (14), and a sliding plate (15). Two symmetrically distributed sliding plates (15) are slidably connected to the inner wall of the clamping post (12). A plurality of second clamping grooves (14) are equidistantly distributed on the inner wall of the handle (9). A spherical clamping block (13) is rotatably connected to one end of the sliding plate (15) close to the second clamping groove (14).

6. The clamping connection structure of a ball valve according to claim 5, characterized in that: A return spring (16) is fixedly connected between the sliding plate (15) and the inner wall of the clamping post (12).

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