CN214425152U

CN214425152U - Ball valve

Info

Publication number: CN214425152U
Application number: CN202120192541.4U
Authority: CN
Inventors: 蒋小平
Original assignee: Shanghai Qiyu Mechanical And Electrical Equipment Co ltd
Current assignee: Shanghai Qiyu Mechanical And Electrical Equipment Co ltd
Priority date: 2021-01-23
Filing date: 2021-01-23
Publication date: 2021-10-19
Anticipated expiration: 2031-01-23

Abstract

The utility model aims at providing a ball valve convenient to dismouting and switch are nimble, including the valve body, be provided with globular case in the valve body, valve rod assembly passes and is connected with the case after seting up some installation pipes on the valve body, valve rod assembly adjusts the position by of passageway dislocation on the case and the communicating work position of passageway on the valve body and the valve body or passageway on the case and the valve body, be provided with two liners at least between the inner chamber of valve body and the case outer wall, and the liner divides the both sides of arranging the horizontal central plane of case in, the outer face of filling up of liner and the inner wall laminating of valve body, the sphere laminating of interior face of filling up and case. In the above scheme, the upper position of the valve core is limited by the gasket positioned above the horizontal central plane of the valve core, and the lower position of the valve core is limited by the gasket positioned below the horizontal central plane of the valve core, so that the position of the valve core in the valve body is fixed, the valve core cannot rotate in the valve body, and the valve rod assembly and the valve core are very easy to align when assembled, and are simple and convenient to assemble and disassemble.

Description

Ball valve

Technical Field

The utility model belongs to the technical field of the valve is made, especially involve a ball valve.

Background

The ball valve has the advantages of simple structure, good sealing performance, small driving moment, simple and convenient operation and easy realization of quick opening and closing, and is one of the commonly used valves. The ball valve is developed from a plug valve, and the opening and closing element of the ball valve is a ball body which is rotated by 90 degrees around the axis of a valve rod to realize the opening and closing purposes. The Chinese application named as ball valve (publication number: CN200965076Y) discloses the following technical proposal: the valve seat is internally provided with a cavity, two opposite sides of the valve seat are respectively provided with a first through hole and a second through hole which are communicated with the cavity, the supporting piece is arranged in the cavity of the valve seat, the supporting surface of the supporting piece faces upwards, the notches correspond to the directions of the first through hole and the second through hole, the two notches are just abutted against the annular gaskets at the opposite ends to limit the supporting piece, the ball body is arranged in the cavity of the valve seat and is juxtaposed on the supporting surface of the supporting piece, so that the supporting surface can limit and support the ball body, and the bottom surface of the ball body is pushed and limited by the supporting surface, so that the horizontal height position of the ball body can be limited. However, the support member is only arranged on the bottom surface of the ball body and is only used for limiting the horizontal height position of the ball body, and the upper position of the ball body is limited by the movable bolt shaft, so that the ball body can rotate in the cavity before the movable bolt shaft is not connected with the ball body, and the linear slot formed in the ball body is difficult to align with the linear bump at the lower end of the movable bolt shaft, thereby causing difficulty in assembly; in addition, the contact area between the support piece and the ball body is large and is close to one third of the surface area of the whole ball body, so that the friction force between the support piece and the ball body is large, and the ball body is very laborious to rotate.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a ball valve convenient to dismouting and switch are nimble.

In order to realize the purpose, the utility model discloses a technical scheme be: the utility model provides a ball valve, includes the valve body, be provided with globular case in the valve body, valve rod assembly passes and offers some installation pipes on the valve body after and is connected with the case, valve rod assembly adjusts the case and rotates the communicating work position of route on the case and the valve body or the passageway on the case and the dislocation of the passageway on the valve body end the position, be provided with two liners at least between the inner chamber of valve body and the case outer wall, and the liner branch is arranged in the both sides of the horizontal central plane of case, the outer face of filling up of liner and the laminating of the inner wall of valve body, the face of filling up in and the sphere laminating of case.

In the scheme, the upper position of the valve core is limited by the gasket positioned above the horizontal central plane of the valve core, and the lower position of the valve core is limited by the gasket positioned below the horizontal central plane of the valve core, so that the position of the valve core in the valve body is fixed, the valve core cannot rotate in the valve body, the valve rod assembly and the valve core are aligned easily when being disassembled and assembled, and the disassembly and the assembly are simple and convenient.

Drawings

FIG. 1 is a cross-sectional view of a ball valve;

FIG. 2 is an exploded view of the ball valve;

Detailed Description

As shown in fig. 1 and 2, a ball valve includes a valve body 10, a spherical valve core 20 is disposed in the valve body 10, a valve rod assembly 30 passes through an installation pipe 11 disposed on the valve body 10 and then is connected to the valve core 20, the valve rod assembly 30 adjusts the valve core 20 to rotate to a working position where a passage on the valve core 20 is communicated with a passage on the valve body 10 or a stop position where a passage on the valve core 20 is staggered with a passage on the valve body 10, at least two gaskets 50 are disposed between an inner cavity of the valve body 10 and an outer wall of the valve core 20, the gaskets 50 are disposed on two sides of a horizontal center plane of the valve core 20, an outer gasket surface of each gasket 50 is attached to an inner wall of the valve body 10, and an inner gasket surface of each gasket is attached to a spherical surface of the valve core 20. The upper position of the valve core 20 is defined by the gasket 50 above the horizontal central plane of the valve core 20, and the lower position of the valve core 20 is defined by the gasket 50 below the horizontal central plane of the valve core 20, so that the position of the valve core 20 in the valve body 10 is fixed, the valve core 20 cannot rotate in the valve body 10, and the valve rod assembly 30 and the valve core 20 are easily aligned when assembled, and the assembly and disassembly are simple and convenient.

As a preferable scheme of the invention, the whole gasket 50 is in an arc plate shape, the curvature center of the arc plate is coincided with the spherical center of the valve core 20, the outer gasket surface of the gasket 50 is convexly provided with a positioning lug 51 towards the inner cavity of the valve body 10, and the positioning lug 51 is arranged in a positioning hole 16 formed in the inner cavity of the valve body 10 to form positioning fit. In practical use, the gasket 50 is made of an elastic material, during production, the gasket 50 is flat, the thickness of the gasket 50 is matched with a gap between an inner cavity of the valve body 10 and the outer wall of the valve core 20, when the gasket 50 is arranged between the inner cavity of the valve body 10 and the outer wall of the valve core 20, the positioning bump 51 is arranged in the positioning hole 16, the position of the gasket 50 is fixed, the outer side of the gasket is naturally deformed into an arc plate shape, the curvature center of the gasket is overlapped with the spherical center of the valve core 20, the inner gasket surface is attached to the outer wall of the valve core 20, and therefore the position of the valve core 20 can be guaranteed while the gasket can be easily and freely rotated.

Further, four gaskets 50 are provided, and the four gaskets 50 are arranged in a central symmetry with respect to the valve core 20, and the area of the gasket surface inside the gasket 50 is 1/50-1/30 of the area of the outer surface of the valve core 20. As shown in fig. 2, the four gaskets 50 limit the valve core 20 symmetrically from four directions, i.e., from the upper left direction, the upper right direction, the lower left direction and the lower right direction, so as to ensure the balanced and stable stress on the valve core 20; the sum of the contact areas of the four gaskets 50 and the valve core 20 is much smaller than the contact area of the support member and the ball in the prior art, so that the valve rod assembly 30 can rotate flexibly and saves labor.

In order to further improve the stability of the connection of the gasket 50 to the valve body 10, two positioning protrusions 51 are provided on each gasket 50.

Preferably, the liner 50 is made of a polytetrafluoroethylene material, the polytetrafluoroethylene material has the characteristics of oil resistance, acid resistance, alkali resistance and various organic solvent resistance, and is almost insoluble in all solvents, meanwhile, the polytetrafluoroethylene material has the characteristics of high temperature resistance and low temperature resistance, and the friction coefficient of the polytetrafluoroethylene material is extremely low, so that the polytetrafluoroethylene material has a self-lubricating effect and is beneficial to the rotation of the valve core 20.

The inner cavity of the valve body 10 is spherical, and the spherical center of the spherical surface coincides with the spherical center of the valve core 20, so that the outer cushion surface of the gasket 50 can be completely attached to the inner cavity of the valve body 10, and the inner cushion surface can be attached to the outer wall of the valve core 20, thereby ensuring the position accuracy of the valve core 20.

In order to realize that the valve core 20 can be installed in the inner cavity of the valve body 10, the valve body 10 is formed by butting a first half body 13 and a second half body 14, outer flanges of the first half body 13 and the second half body 14 are fixedly connected through a bolt 15, an installation pipe 11 is arranged on the second half body 14 and is integrally cast and formed with the second half body 14, firstly, after a gasket 50 is installed in a positioning hole 16 of the valve body 10, the first half body 13 and the second half body 14 are butted to wrap the valve core 20 inside, and finally, the valve core 20 is fixedly connected through the bolt 15, so that the operation is simple.

The valve rod assembly 30 includes a valve rod 31, a linear projection 311 is provided at the lower end of the valve rod 31 and protrudes toward the valve core 20, and the linear projection 311 is inserted into a linear slot 21 formed on the valve core 20 to form axial movement fit and circumferential synchronous rotation fit of the valve rod 31. The linear convex block 311 is inserted into the linear slot 21 formed on the valve core 20 to realize the rotation of the valve core 20, and here, because the position of the valve core 20 is limited by the gasket 50, the linear convex block 311 only needs to be inserted into the linear slot 21 to realize synchronous rotation, thereby ensuring that the valve rod 31 can rotate flexibly.

In order to prevent liquid in the pipeline from entering the cavity between the valve core 20 and the valve body 10, a stepped hole 12 is arranged at the port of the passage of the valve body 10, which is matched with the valve core 20, and a compensation sealing assembly 60 is arranged in the stepped hole 12 to seal the outer wall of the valve core 20 close to the port with the inner wall of the valve body 10 so as to compensate abrasion and prolong the service life of the ball valve.

Claims

1. The utility model provides a ball valve, includes valve body (10), is provided with globular case (20) in valve body (10), and valve rod assembly (30) pass and offer some installation pipe (11) on valve body (10) after and be connected with case (20), and valve rod assembly (30) adjust case (20) and rotate the communicating work position of passageway on to case (20) and valve body (10) or the end position of passageway dislocation on the passageway on case (20) and the valve body (10), its characterized in that: at least two gaskets (50) are arranged between the inner cavity of the valve body (10) and the outer wall of the valve core (20), the gaskets (50) are respectively arranged on two sides of the horizontal central plane of the valve core (20), the outer gasket surface of each gasket (50) is attached to the inner wall of the valve body (10), and the inner gasket surface is attached to the spherical surface of the valve core (20).

2. The ball valve according to claim 1, wherein: the liner (50) is integrally arc-shaped plate-shaped, the curvature center of the arc-shaped plate coincides with the spherical center of the valve core (20), the outer gasket surface of the liner (50) convexly extends towards the inner cavity of the valve body (10) and is provided with a positioning lug (51), and the positioning lug (51) is arranged in a positioning hole (16) formed in the inner cavity of the valve body (10) to form positioning fit.

3. The ball valve of claim 2, wherein: the gasket (50) is provided with four gaskets, the four gaskets (50) are arranged in a central symmetry mode relative to the valve core (20), and the area of the gasket surface in each gasket (50) is 1/50-1/30 of the area of the outer surface of the valve core (20).

4. The ball valve of claim 2, wherein: two positioning projections (51) are arranged on each pad (50).

5. The ball valve according to claim 1, wherein: the liner (50) is made of polytetrafluoroethylene material.

6. The ball valve according to claim 1, wherein: the inner cavity of the valve body (10) is spherical, and the spherical center of the spherical surface is superposed with the spherical center of the valve core (20).

7. The ball valve according to claim 1, wherein: the valve body (10) is formed by butting a first half body and a second half body (13 and 14), outer flanges of the first half body and the second half body (13 and 14) are fixedly connected through bolts (15), and the mounting pipe (11) is arranged on the second half body (14) and is integrally cast and molded with the second half body (14).

8. The ball valve according to claim 1, wherein: the valve rod assembly (30) comprises a valve rod (31), the lower end of the valve rod (31) protrudes towards the valve core (20) and is provided with a linear convex block (311), and the linear convex block (311) is inserted into a linear slot (21) formed in the valve core (20) to form axial movement fit and circumferential synchronous rotation fit of the valve rod (31).

9. The ball valve according to claim 1, wherein: a stepped hole (12) is formed in the opening of the valve body (10) passage matched with the valve core (20), and a compensation sealing assembly (60) is arranged in the stepped hole (12) to seal the outer wall of the valve core (20) close to the opening with the inner wall of the valve body (10).