CN221054346U

CN221054346U - Sealing structure of ball valve

Info

Publication number: CN221054346U
Application number: CN202322852477.XU
Authority: CN
Inventors: 庞鸿飞; 任俊杰; 赵冶; 申朝朝
Original assignee: Tianjin Teke Actuator Co ltd
Current assignee: Tianjin Teke Actuator Co ltd
Priority date: 2023-10-24
Filing date: 2023-10-24
Publication date: 2024-05-31
Anticipated expiration: 2033-10-24

Abstract

The utility model relates to a sealing structure of a ball valve, which comprises a valve ball, a valve body, a connecting pipeline and a loop nut, wherein a valve seat is arranged between the valve ball and the valve body; the inner sides of the valve bodies are respectively fixedly provided with a limiting plate, and the limiting plates are positioned on the inner sides of the valve seats and used for limiting the axial movement of the valve seats. The annular first mounting groove is formed in the inner wall of the two sides of the valve body of the sealing structure, the valve seat is mounted in the first mounting groove, the limiting plate is fixedly mounted on the valve body which is positioned on the inner side of the upper portion and the lower portion of the first mounting groove, the limiting plate, the first mounting groove and the valve ball jointly form a cavity for accommodating the valve seat, all sides of the valve seat are fixed, axial movement of the valve seat is limited, dislocation of the valve seat due to fluid impact is not easy to occur when the valve seat is used in a gas-liquid two-phase application scene, sealing effect is improved, abrasion rate of the valve seat is reduced, maintenance and replacement times of the valve seat are reduced, service life of the valve seat is prolonged, and use cost is saved.

Description

Sealing structure of ball valve

Technical Field

The utility model belongs to the technical field of ball valves, and relates to sealing of ball valves, in particular to a sealing structure of a ball valve.

Background

The ball valve is a valve which is driven by a valve rod to rotate around the axis of the valve rod. Because the ball valve has the characteristic of small fluid resistance, the ball valve can be tightly closed only by small rotation moment, and is suitable for being used as a switch and a cut-off valve, and is mainly used for cutting off, distributing and changing the flow direction of a medium in a pipeline.

A valve seat is usually fixedly arranged between the valve ball and the valve body so as to achieve the aim of sealing; the conventional valve seat is fixed by providing a protrusion on the valve body for fixing an end portion of the valve seat. However, when the valve with two phases of gas and liquid is in a semi-open and semi-closed state, fluid still easily impacts the valve seat through the valve seat, so that the valve seat is misplaced, and abrasion deformation occurs when the valve ball rotates, so that the valve seat is scrapped.

The ball valve and the connecting pipeline are usually connected by adopting a flange, and the flange plates are connected together by using bolts, so that the ball valve and the connecting pipeline are additionally assisted by tools during installation and disassembly, and are more complicated; and the connection surface of the flange plate is a plane, if the fastening force of the bolts is uneven or the connection surface is uneven, the leakage problem is easy to occur.

To this end, we propose a sealing structure of a ball valve to solve the above-mentioned problems.

Disclosure of utility model

The utility model aims to overcome the defects of the prior art and provide a sealing structure of a ball valve with good sealing and long service life.

In order to solve the problems, the technical scheme of the utility model is as follows:

The sealing structure of the ball valve comprises a valve ball, a valve body, a connecting pipeline, a looper nut and a connecting pipeline, wherein a valve seat is arranged between the valve ball and the valve body;

The inner sides of the valve bodies are respectively fixedly provided with a limiting plate, and the limiting plates are positioned on the inner sides of the valve seats and used for limiting the axial movement of the valve seats.

In a further embodiment, first mounting grooves are formed in the inner walls of the two sides of the valve body, and a vertically arranged limiting plate is fixedly arranged on the valve body on the inner side of the first mounting grooves, and the first mounting grooves and the limiting plate jointly form a chamber for accommodating the valve seat.

In a further embodiment, the side of the valve seat remote from the valve ball is provided with a groove in which a valve seat sealing ring is mounted.

In a further embodiment, the surfaces of the limiting plate and the valve seat, which contact the valve ball, are cambered surfaces, and are adapted to cooperate with the rotation of the valve ball.

In a further embodiment, the limiting plates are four and fixedly mounted inside the upper and lower end portions of the first mounting groove, respectively.

In a further embodiment, the valve body is in threaded connection with one end of the union nut, the other end of the union nut is provided with an inward annular protrusion, one end of the connecting pipe is provided with an outward annular protrusion, and the protruding end of the union nut corresponds to the protruding end of the connecting pipe and is suitable for fixedly mounting the connecting pipe.

In a further embodiment, the two end surfaces of the outer side of the valve body are respectively provided with a second mounting groove, and one end part of the connecting sealing ring is mounted in the second mounting groove.

In a further embodiment, an annular first protrusion corresponding to the second mounting groove is formed on one end face of the connecting sealing ring, and an annular groove is formed in the middle of the first protrusion.

In a further embodiment, the other end face of the connecting sealing ring is provided with an annular second bulge which abuts against the end face of the connecting pipeline.

In a further embodiment, the limiting plate is fixedly mounted to the valve body by means of bolts.

Compared with the prior art, the utility model has the beneficial effects that:

1. The annular first mounting groove is formed in the inner wall of the two sides of the valve body of the sealing structure, the annular valve seat is mounted in the first mounting groove, the limiting plate is fixedly mounted on the valve body which is positioned on the inner side of the upper portion and the lower portion of the first mounting groove, the limiting plate, the first mounting groove and the valve ball jointly form a cavity for accommodating the valve seat, each side face of the valve seat is fixed, axial movement of the valve seat is limited, dislocation of the valve seat due to fluid impact is not easy to occur when the valve seat is used in a gas-liquid two-phase application scene, sealing effect is improved, abrasion rate of the valve seat is reduced, maintenance and replacement times of the valve seat are reduced, service life of the valve seat is prolonged, and use cost is saved.

2. The two ends of the valve body of the sealing structure are respectively and coaxially fixedly connected with a connecting pipeline through a looper nut, the two end faces of the outer side of the valve body are respectively provided with a second mounting groove, and one end part of a connecting sealing ring is arranged in the second mounting groove; an annular first bulge corresponding to the second mounting groove is formed on one end face of the connecting sealing ring, and an annular groove is formed in the middle of the first bulge, so that the connecting sealing ring can be conveniently extruded inwards, and the sealing effect is improved; the other end face of the connecting sealing ring is provided with a second annular bulge, the second bulge is propped against the end face of the connecting pipeline, and the sealing effect of the joint of the valve body and the connecting pipeline is enhanced.

3. The valve body of this seal structure adopts threaded connection's mode with the one end of loop nut, and the other end system of loop nut has inwards annular protruding, and the one end system of connecting tube has outwards annular protruding, and the protruding tip of loop nut supports the protruding tip outside at connecting tube, need not extra use instrument and can install convenient and fast.

4. The limiting plate is arranged at the valve seat to limit the valve seat to deviate, so that the problem of leakage of the ball valve caused by movement and abrasion of the valve seat is avoided, and the tightness of the valve seat is improved; the valve body is in the same place through loop nut fixed connection with connecting tube, and fixed mounting has the connection sealing washer between valve body and the connecting tube, improves the leakproofness of junction, and disk seat department and loop nut department mutually support, improve the sealed effect of whole ball valve, make the ball valve work steadily, extension ball valve life-span.

Drawings

FIG. 1 is a schematic illustration of a sealing structure of a ball valve;

FIG. 2 is a schematic view of a valve seat structure of a sealing structure of a ball valve;

fig. 3 is a schematic view of a looper nut of a sealing structure of a ball valve.

In the figure: 1. a valve ball; 2. a valve body; 21. a first mounting groove; 22. a second mounting groove; 3. a connecting pipe; 4. a looper nut; 5. a valve seat; 6. a limiting plate; 7. a valve seat seal ring; 8. and a sealing ring is connected.

Detailed Description

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

Example 1:

The utility model provides a seal structure of ball valve, as shown in fig. 1 to 3, includes valve ball 1 and valve body 2, and valve ball 1 rotates to be installed in valve body 2, installs disk seat 5 between valve ball 1 and the valve body 2, and the both ends portion of valve body 2 passes through the union nut 4 coaxial fixed connection connecting tube 3 respectively.

As shown in fig. 1 and 2, annular first mounting grooves 21 are formed in the inner walls of the two sides of the valve body 2, and annular valve seats 5 are mounted in the first mounting grooves 21; the valve body 2 positioned at the inner side of the first mounting groove 21 is fixedly provided with a vertically arranged limiting plate 6 through a bolt, the limiting plate 6 and the first mounting groove 21 form a cavity for accommodating the valve seat 5 together, the size of the cavity corresponds to that of the valve seat 5, three sides of the valve seat 5 are limited to move by the inner wall of the cavity, and the fourth side of the valve seat 5 is contacted with the valve ball 1, so that the axial movement of the valve seat 5 is limited; the surfaces of the limiting plate 6 and the valve seat 5, which are in contact with the valve ball 1, are cambered surfaces, so that the limiting plate is convenient to be matched with the valve ball 1, and the valve ball 1 can smoothly rotate. Preferably, the number of the limiting plates 6 is four, and the limiting plates are fixedly installed at the inner sides of the upper and lower parts of the first installation groove 21, respectively. The outer end part of the valve seat 5, which is far away from one side of the valve ball 1, is provided with a groove for installing a valve seat sealing ring 7, so that the sealing effect of the valve seat 5 is improved. Preferably, the cross section of the groove of the valve seat 5 is rectangular or arc-shaped.

As shown in fig. 1 and 3, two ends of the valve body 2 are in threaded connection with the looper nut 4, threads are formed on the outer sides of the two ends of the valve body 2, threads are formed on the inner wall of the looper nut 4, an inward annular bulge is formed on one end of the looper nut 4, an outward annular bulge is formed on one end of the connecting pipeline 3, the bulge end of the connecting pipeline 3 is positioned on the inner side of the looper nut 4, and the bulge end of the connecting pipeline 3 is matched with the bulge end of the looper nut 4; the two end parts of the valve body 2 are provided with annular second mounting grooves 22, one end part of the connecting sealing ring 8 is arranged in the second mounting grooves 22, one end surface of the connecting sealing ring 8 is provided with annular first bulges corresponding to the second mounting grooves 22, the middle parts of the first bulges are provided with inward annular grooves, so that the connecting sealing ring 8 is in interference fit with the second mounting grooves 22, and the sealing effect is better; the other end face of the connecting sealing ring 8 is provided with a second annular bulge which is propped against the end face of the connecting pipeline 3. Preferably, the cross sections of the protrusions connecting the sealing rings 8 are arc-shaped structures, rectangular structures or triangular structures.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. The utility model provides a seal structure of ball valve, includes valve ball (1) and valve body (2), valve ball (1) with install disk seat (5), its characterized in that between valve body (2): the valve further comprises a connecting pipeline (3) and a looper nut (4), wherein the two ends of the valve body (2) are respectively and coaxially connected with the connecting pipeline (3) through the looper nut (4);

The inner sides of the valve bodies (2) are respectively fixedly provided with a limiting plate (6), and the limiting plates (6) are positioned on the inner sides of the valve seats (5) and used for limiting the axial movement of the valve seats (5).

2. The sealing structure of a ball valve according to claim 1, wherein: first mounting groove (21) are made on the inner wall of valve body (2) both sides, are located first mounting groove (21) inboard fixed mounting is vertical setting on valve body (2) limiting plate (6), first mounting groove (21) with limiting plate (6) form jointly and are used for holding the cavity of disk seat (5).

3. The sealing structure of a ball valve according to claim 2, wherein: a groove is formed in one side, far away from the valve ball (1), of the valve seat (5), and a valve seat sealing ring (7) is arranged in the groove.

4. A sealing structure of a ball valve according to claim 3, wherein: the surfaces of the limiting plate (6) and the valve seat (5) which are in contact with the valve ball (1) are cambered surfaces, and are suitable for being matched with the valve ball (1) to rotate.

5. The sealing structure of a ball valve according to claim 4, wherein: the limiting plates (6) are four and are respectively and fixedly arranged on the inner sides of the upper end part and the lower end part of the first mounting groove (21).

6. A sealing structure of a ball valve according to any one of claims 1 to 5, characterized in that: the valve body (2) is in threaded connection with one end part of the looper nut (4), an inward annular bulge is formed at the other end part of the looper nut (4), an outward annular bulge is formed at one end part of the connecting pipeline (3), and the bulge end part of the looper nut (4) corresponds to the bulge end part of the connecting pipeline (3) and is suitable for fixedly mounting the connecting pipeline (3).

7. The sealing structure of a ball valve according to claim 6, wherein: second mounting grooves (22) are formed in the two end faces of the outer side of the valve body (2), and one end portion of the connecting sealing ring (8) is mounted in each second mounting groove (22).

8. The sealing structure of a ball valve according to claim 7, wherein: an annular first bulge corresponding to the second mounting groove (22) is formed on one end face of the connecting sealing ring (8), and an annular groove is formed in the middle of the first bulge.

9. The sealing structure of a ball valve according to claim 8, wherein: the other end face of the connecting sealing ring (8) is provided with a second annular bulge, and the second bulge is propped against the end face of the connecting pipeline (3).

10. A sealing structure of a ball valve according to any one of claims 1 to 5, characterized in that: the limiting plate (6) is fixedly arranged on the valve body (2) through bolts.