CN215568105U

CN215568105U - Floating ball valve

Info

Publication number: CN215568105U
Application number: CN202122211565.2U
Authority: CN
Inventors: 林俊穆; 卓淑珍; 陈永庆; 邓辉强; 刘学芳
Original assignee: Felp Valve Technology Co ltd
Current assignee: Felp Valve Technology Co ltd
Priority date: 2021-09-13
Filing date: 2021-09-13
Publication date: 2022-01-18
Anticipated expiration: 2031-09-13

Abstract

The utility model discloses a floating ball valve, relates to the field of ball valves, and solves the technical problem of internal leakage of sealing. The pneumatic valve comprises a valve body, a ball body, a valve rod and an inflation valve seat, wherein the inflation valve seat comprises an annular air cushion, a soft sealing layer is arranged on the outer surface of the annular air cushion, and the soft sealing layer is in sealing fit with the ball body; the valve body and the inflating valve seat are provided with inflating air holes which are communicated with the inner cavity of the annular air cushion, and the inflating air holes are communicated with an inflating pump. In the process of the forced floating displacement of the ball body, the annular air cushion is stressed and extruded to be full, the sealing with the ball body can be compensated, and the sealing performance of the ball valve is improved; in the long-term use of inflation valve seat, accessible pump inputs atmospheric pressure to its inside, makes it expand, can more laminate in spheroid one side after the annular air cushion inflation, prolongs sealed life, makes it keep sealed effect. The utility model is suitable for being used in pipelines with low medium pressure.

Description

Floating ball valve

Technical Field

The utility model relates to the field of ball valves, in particular to a floating ball valve.

Background

The floating ball valve comprises a valve body, a valve seat arranged in an inner cavity of the valve body, a ball body arranged in the valve body through a valve rod and in sealing fit with the valve seat, a connecting disc connected with the valve rod and a packing structure for preventing medium leakage, wherein the valve body, the valve seat and the ball body are all made of metal materials. Because the traditional floating ball valve often has the valve seat stressed deformation in the process of the pressed movement of the ball body, or the valve seat is abraded due to the rotation of the ball body under the long-term use, the condition of internal leakage of the sealing part of the valve and the valve seat is caused.

Disclosure of Invention

The purpose of the utility model is as follows: in order to overcome the defects of the prior art, the utility model provides a floating ball valve, which solves the technical problems.

The technical scheme of the utility model is as follows: the pneumatic valve comprises a valve body, a ball body, a valve rod and an inflation valve seat, wherein the inflation valve seat comprises an annular air cushion, a soft sealing layer is arranged on the outer surface of the annular air cushion, and the soft sealing layer is in sealing fit with the ball body; and the valve body and the inflating valve seat are provided with inflating air holes, the inflating air holes are communicated with the inner cavity of the annular air cushion, and the inflating air holes are communicated with an inflating pump.

Furthermore, an annular fixing frame is further arranged in the inner cavity of the annular air cushion, and the cross section of the annular fixing frame is in a cross shape and is supported on the peripheral inner surface of the annular air cushion.

Furthermore, the annular fixing frame is provided with a vent hole.

Furthermore, be provided with on the inner wall of valve body and surround the fixed plate, surround the fixed plate and be half encirclement form and surround outside the inflation valve seat, inflation valve seat laminating fixed mounting is in the inboard of surrounding the fixed plate.

Furthermore, the surrounding fixing plate is provided with a positioning protrusion, the inner wall of the valve body is provided with a positioning groove, and the positioning protrusion is clamped into the positioning groove to form positioning fit.

Further, the inner walls of the valve body on two sides of the air inflation hole are provided with sealing rings, and the sealing rings are located between the inner wall of the valve body and the surrounding fixing plate.

Furthermore, an electric actuator is connected to the valve rod and is connected with the inflator pump circuit.

Adopt above-mentioned technical scheme: through the arrangement of the annular air cushion, the ball body, the valve body and the air inlet pipe, as the annular air cushion and the soft sealing layer are soft bodies, the annular air cushion is stressed and extruded to be full in the process of the forced floating displacement of the ball body, the sealing with the ball body can be compensated, and the sealing performance of the ball valve is improved; in the long-term use of inflation valve seat, accessible pump inputs atmospheric pressure to its inside, makes it expand, can more laminate in spheroid one side after the annular air cushion inflation, prolongs sealed life, makes it keep sealed effect. The utility model is suitable for being used in pipelines with low medium pressure.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of the utility model at A in FIG. 1;

wherein, 1, a valve body; 2. a sphere; 3. a valve stem; 4. an inflatable valve seat; 41. an annular air cushion; 42. a soft sealing layer; 11. inflating the air holes; 43. an annular fixing frame; 431. a vent hole; 5. surrounding the fixed plate; 51. positioning the projection; 12. a positioning groove; 13. a seal ring; 6. an electric actuator.

Detailed Description

As shown in fig. 1 and 2, the floating ball valve includes a valve body 1, a ball body 2, a valve rod 3 and an inflation valve seat 4, wherein the inflation valve seat 4 includes an annular air cushion 41, a soft sealing layer 42 is arranged on the outer surface of the annular air cushion 41, and the soft sealing layer 42 is in sealing fit with the ball body 2; the valve body 1 and the inflation valve seat 4 are provided with inflation air holes 11, the inflation air holes 11 are communicated with the inner cavity of the annular air cushion 41, the inflation air holes 11 are communicated with an inflator pump, and the inflator pump pumps air into the inflation air holes 11. The soft sealing layer 42 is made of soft material such as nitrile rubber, fluorine rubber, or polytetrafluoroethylene. When the worker controls the sphere 2 to rotate, in order to reduce the resistance on the sphere 2, the inflator pump can be closed, so that the torque is reduced, and the worker can operate the inflator pump conveniently; when the valve is closed, the pump starts to operate, so that the annular air cushion 41 is inflated to form a sealing fit between the soft sealing layer 42 and the ball 2.

An annular fixing frame 43 is further arranged in the inner cavity of the annular air cushion 41, the section of the annular fixing frame 43 is in a cross shape, and the four-side frame bodies of the annular fixing frame 43 are respectively supported on the peripheral inner surfaces of the annular air cushion 41. The annular fixing frame 43 serves as a support frame inside the annular air cushion 41, and plays a role in supporting the annular air cushion 41, so that the annular air cushion 41 is prevented from being excessively shrunken to be damaged or losing the sealing effect.

The quadrilateral frame body of the annular fixing frame 43 is provided with a plurality of air holes 431, and when the air is input from the air inflation hole 11, the air pressure at each position is balanced through the air holes 431.

The inner wall of the valve body 1 is provided with a surrounding fixing plate 5, the surrounding fixing plate 5 surrounds the inflation valve seat 4 in a semi-surrounding manner, the inflation valve seat 4 is fixedly installed on the inner side of the surrounding fixing plate 5 in an attaching manner, and the inflation valve seat 4 is only exposed out of one position sealed with the ball body 2. During processing, the inflation valve seat 4 can be bonded to the surrounding fastening plate 5 to form an effective fastening. The surrounding fixing plate 5 is protected at the periphery of the inflation valve seat 4, and plays a certain role in protecting and fixing the inflation valve seat 4.

The surrounding fixing plate 5 is provided with a positioning protrusion 51, the inner wall of the valve body 1 is provided with a positioning groove 12, and the positioning protrusion 51 is clamped into the positioning groove 12 to form positioning fit, so that the inflation valve seat 4 has a determined direction in the valve body 1, and the inflation air hole 11 can be communicated with each other continuously when the inflation valve seat 4 is installed.

The inner walls of the valve body 1 at two sides of the air inflation hole 11 are also provided with sealing rings 13, the sealing rings 13 are positioned between the inner wall of the valve body 1 and the surrounding fixing plate 5, the sealing rings 13 can prevent a medium from entering a gap between the inner wall of the valve body 1 and the surrounding fixing plate 5, and air leakage of the air inflation hole 11 can also be prevented.

Be connected with electric actuator 6 on the valve rod 3, electric actuator 6 and pump circuit connection, electric actuator 6 is in the twinkling of an eye of opening and close, and the operation of self-closing pump makes the staff control more convenient.

Claims

1. The utility model provides a ball valve floats, including valve body, spheroid and valve rod, its characterized in that: the inflatable valve seat comprises an annular air cushion, a soft sealing layer is arranged on the outer surface of the annular air cushion, and the soft sealing layer is in sealing fit with the ball body; and the valve body and the inflating valve seat are provided with inflating air holes, the inflating air holes are communicated with the inner cavity of the annular air cushion, and the inflating air holes are communicated with an inflating pump.

2. The floating ball valve of claim 1, wherein: an annular fixing frame is further arranged in the inner cavity of the annular air cushion, and the cross section of the annular fixing frame is in a cross shape and is supported on the peripheral inner surface of the annular air cushion.

3. The floating ball valve of claim 2, wherein: the annular fixing frame is provided with a vent hole.

4. A floating ball valve according to claim 1 or 2, wherein: be provided with on the inner wall of valve body and surround the fixed plate, surround the fixed plate and be half encirclement form and surround outside the inflation valve seat, inflation valve seat laminating fixed mounting is in the inboard of surrounding the fixed plate.

5. The floating ball valve of claim 4, wherein: the surrounding fixing plate is provided with a positioning protrusion, the inner wall of the valve body is provided with a positioning groove, and the positioning protrusion is clamped into the positioning groove to form positioning fit.

6. The floating ball valve of claim 5, wherein: still be provided with the sealing washer on the valve body inner wall of aerifing the gas pocket both sides, the sealing washer is located between valve body inner wall and the surrounding fixed plate.

7. A floating ball valve according to claim 1 or 2, wherein: and the valve rod is connected with an electric actuator, and the electric actuator is connected with an inflator pump circuit.