CN210034512U

CN210034512U - Novel valve seat of ball valve

Info

Publication number: CN210034512U
Application number: CN201920857709.1U
Authority: CN
Inventors: 张鹏程; 庄晟励; 顾玉海; 王良松
Original assignee: Zhejiang Jin Pu Industrial Co Ltd
Current assignee: Zhejiang Jin Pu Industrial Co Ltd
Priority date: 2019-06-10
Filing date: 2019-06-10
Publication date: 2020-02-07
Anticipated expiration: 2029-06-10

Abstract

The utility model relates to a novel valve seat of a ball valve, which comprises a valve seat support ring, wherein a soft sealing ring is embedded in the valve seat support ring; the sealing device is characterized in that an upper pressure cavity and a lower pressure cavity are arranged in a soft sealing ring, a pressure hole formed in the outer ring surface of the upper pressure cavity is communicated with a pressurizing hole in a valve body, a metal supporting ring is embedded in the inner ring surface of the upper pressure cavity, a soft sealing surface is formed between the upper pressure cavity and the lower pressure cavity, a metal sealing seat is arranged in the lower pressure cavity, and control pressure is injected into the upper pressure cavity and the lower pressure cavity to respectively push the sealing surface of the soft sealing ring and the metal sealing seat to be in compression sealing fit with a ball body to form two sealing pairs, so that the two sealing pairs have high sealing specific pressure and good.

Description

Novel valve seat of ball valve

Technical Field

The utility model belongs to the valve field, concretely relates to ball valve disk seat of soft seal and hard seal double seal function.

Background

The ball valve is widely applied to medium pipelines in various fields of national economy due to simple structure, convenient opening and closing and small flow resistance. In order to improve the sealing performance between the ball body and the valve seat, the valve seat of the existing ball valve generally adopts a double-sealing structure formed by a soft seal, a hard seal and the ball body. However, in the double-seal valve seat of the existing ball valve, the soft seal valve seat and the hard seal valve seat are simultaneously pressed and sealed with the ball body, for example, the double-seal ball valve seat with a compact structure disclosed as CN108980398A adopts a double-seal structure of an inner valve seat and an outer valve seat, but in the process of sealing and matching the valve seat and the ball body, the double-seal valve seat is simultaneously pressed and sealed with the ball body. The main disadvantage is that because of the manufacturing and assembling error of two valve seats, the pressing force between one valve seat and the ball is easy to be smaller, so that the sealing specific pressure between the valve seat and the ball is small, and the sealing effect can not be achieved.

Disclosure of Invention

The utility model discloses to prior art's not enough, provide an adopt the soft seal face and the hard seal face of pressure control disk seat to compress tightly respectively with the sealed cooperation of disk seat, make the soft seal between disk seat and the spheroid vice realize high sealed specific pressure respectively with hard seal is vice, realize the novel disk seat of high leakproofness ability's ball valve.

The technical proposal of the utility model comprises a valve seat support ring, wherein a soft sealing ring is embedded in the valve seat support ring; the valve is characterized in that an upper pressure cavity and a lower pressure cavity are arranged in a soft sealing ring, a pressure hole formed in the outer ring surface of the upper pressure cavity is communicated with a pressurizing hole in a valve body, a metal supporting ring is embedded in the inner ring surface of the upper pressure cavity, an axial annular cavity is arranged in the middle of a sealing surface between the upper pressure cavity and the lower pressure cavity, and a through hole is formed between the upper pressure cavity and the lower pressure cavity which are far away from the sealing surface; the lever is uniformly provided with rubber materials in the circumferential direction of the inner ring surface of the upper pressure cavity, the left end of the lever is fixedly arranged on the inner ring surface of the upper pressure cavity by self-tapping screws, a gap is reserved between the left end surface of the lever and the left cavity wall of the upper pressure cavity, the right end of the lever is provided with a vertical rod, the lower end surface of the vertical rod is buckled and pressed on a through hole in the inner ring surface of the upper pressure cavity, the middle of the rubber materials at the horizontal position of the middle part of the lever is wrapped with a metal rod; the lower pressure cavity is embedded with a metal sealing seat, the left end of the metal sealing seat is provided with a sealing surface matched with the ball body, the right end of the metal sealing seat is positioned in the lower pressure cavity, the inner annular surface of the metal sealing seat is axially provided with a plurality of annular convex rings, and the soft sealing ring at the corresponding position of the annular convex rings is provided with an annular groove.

Preferably, a U-shaped groove is formed in the right side of the vertical rod in a horizontal direction, and a small hole communicating with the through hole is formed in the lower side wall of the U-shaped groove.

Preferably, the upper end face of the lever has a radian, and the thickness of the right end of the lever is larger than that of the left end of the lever.

The utility model has the advantages that hydraulic pressure or atmospheric pressure get into the axial toroidal cavity in the middle of the sealed face of last pressure chamber soft seal circle by the compression, make lever right-hand member anticlockwise rotation, closely seal the back at the sealed face of soft seal circle and spheroid pressure, hydraulic pressure or atmospheric pressure pass through the through-hole and get into down the pressure chamber, promote metal seal seat compress tightly left and cooperate with the spheroid seal, soft seal circle and metal seal seat realize respectively with the spheroid that high sealing ratio pressure fit is sealed, sealing performance is good.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an enlarged view of a portion P of fig. 1 according to the present invention.

1 ball body, 2 gland, 3 upper pressure cavities, 4 soft sealing rings, 5 levers, 6 pressure holes, 7 valve seat supporting rings, 8 valve bodies, 9 metal rods, 10 metal supporting rings, 11 metal sealing seats, 12 self-tapping screws, 13 sealing surfaces, 14 axial annular cavities, 15 annular grooves, 16 lower pressure cavities, 17 through holes and 18U-shaped grooves.

Detailed Description

The novel valve seat of the ball valve shown in fig. 1 comprises a valve seat support ring 7, wherein the valve seat support ring 7 is fixedly arranged at a passage opening of a valve body 8, a soft sealing ring 4 is embedded in the valve seat support ring 7, and the soft sealing ring 4 is pressed in a cavity of the valve seat support ring 7 by a valve cover 2; the valve is characterized in that an upper pressure cavity 3 and a lower pressure cavity 16 are arranged in a soft sealing ring 4, a pressure hole 6 communicated with a pressurizing hole on a valve body is formed in the outer annular surface of the upper pressure cavity 3, the pressurizing hole is communicated with a hydraulic system or an air pressure system, a metal support ring 10 is embedded in the inner annular surface of the upper pressure cavity 3, an axial annular cavity 14 is arranged in the middle position of a sealing surface 13 between the upper pressure cavity 3 and the lower pressure cavity 16, wherein the axial direction is along the central line direction of a channel of the valve body 8, and a through hole 17 is formed between the upper pressure cavity 3 and the lower pressure cavity 16 far away from the sealing; the levers 5 are uniformly arranged in the circumferential direction of the inner annular surface of the upper pressure cavity 3, the left end of each lever 5 is fixedly arranged on the inner annular surface of the upper pressure cavity 3 through self-tapping screws 12, a gap is reserved between the left end surface of each lever 5 and the left cavity wall of the upper pressure cavity 3, the distance of the gap is designed according to the requirement of meeting the requirement of the counterclockwise rotation of the lever 5, the left end is close to one end close to the sphere 1 in the drawing, the right end of each lever 5 is provided with a vertical rod made of rubber materials, the lower end surface of the vertical rod is buckled and pressed on a through hole 17 in the inner annular surface of the upper pressure cavity 3, the middle horizontal position of each lever 5 is wrapped with a metal rod 9 in; a metal sealing seat 11 is embedded in a lower pressure cavity 16, the left end of the metal sealing seat 11 is provided with a sealing surface which is matched with the ball 1, the right end is positioned in the lower pressure cavity 16, when hydraulic pressure or air pressure is injected into the upper pressure cavity 3, an axial annular cavity 14 in the middle of the sealing surface 13 is compressed, the left end of a lever 5 is pressed downwards, the right end is lifted, small-amplitude anticlockwise rotation is carried out by taking a metal support ring 10 as a fulcrum, the sealing surface 13 is pressed and sealed with the ball 1, simultaneously, after the right end of the lever 5 is lifted, the lower end surface of a vertical rod is separated from a through hole 17, the upper pressure cavity 3 slowly enters the lower pressure cavity 16, the metal sealing seat 11 is pressed and sealed towards the ball 1, the sealing surface 13 of a soft sealing ring 4 and the metal sealing seat 11 respectively reach high sealing specific pressure with the ball 1, the sealing performance is good, a plurality of annular convex rings are axially arranged on the inner annular surface of the, the annular convex ring is embedded into a groove opening of the annular groove 15, so that the left-right movement elasticity of the metal sealing seat 11 is enhanced, when the lower pressure cavity 16 is filled with pressure, the metal sealing seat 11 easily moves towards the direction of the sphere 1 to be compressed and sealed, when the pressure in the lower pressure cavity 16 is relieved, the annular groove 15 elastically returns the metal sealing seat 11, and the number of the annular grooves 15 is determined according to the size of the channel caliber of the valve body 8.

A U-shaped groove 18 is formed in the right side of the vertical rod in the horizontal direction, and a small hole communicating with the through hole 17 is formed in the lower side wall of the U-shaped groove 18. The lower end face of the vertical rod is fixedly connected with the inner annular face of the upper pressure cavity 3, the upper side face and the lower side face of the U-shaped groove 18 are in a pressing state when the upper pressure cavity 3 is free of pressure, when the upper pressure cavity 3 is filled with pressure, the lever 5 rotates anticlockwise to drive the two side faces of the upper side face and the lower side face of the U-shaped groove 18 to be separated, and pressure media enter the lower pressure cavity 16 through the U-shaped groove 18 and the.

The upper end surface of the lever 5 has a radian, and the thickness of the right end is larger than that of the left end.

Claims

1. A novel valve seat of a ball valve comprises a valve seat support ring (7), wherein the valve seat support ring (7) is fixedly arranged at a passage opening of a valve body (8), a soft sealing ring (4) is embedded in the valve seat support ring (7), and the soft sealing ring (4) is pressed in a cavity of the valve seat support ring (7) through a valve cover (2); the valve is characterized in that an upper pressure cavity (3) and a lower pressure cavity (16) are arranged in a soft sealing ring (4), a pressure hole (6) communicated with a pressurizing hole on a valve body is formed in the outer annular surface of the upper pressure cavity (3), a metal support ring (10) is embedded in the inner annular surface of the upper pressure cavity (3), an axial annular cavity (14) is arranged in the middle of a sealing surface (13) between the upper pressure cavity (3) and the lower pressure cavity (16), and a through hole (17) is formed between the upper pressure cavity (3) far away from the sealing surface and the lower pressure cavity (16); a plurality of levers (5) are uniformly arranged in the circumferential direction of the inner annular surface of the upper pressure cavity (3), the left ends of the levers (5) are fixedly arranged on the inner annular surface of the upper pressure cavity (3) by self-tapping screws (12), a gap is reserved between the left end surface of the levers and the left cavity wall of the upper pressure cavity (3), the right end of the levers (5) is provided with vertical rods made of rubber materials, the lower end surfaces of the vertical rods are buckled and pressed on through holes (17) in the inner annular surface of the upper pressure cavity (3), and the middle of the lower end surface of the horizontal position of the levers (5) is pressed on the metal support; a metal sealing seat (11) is embedded in the lower pressure cavity (16), the left end of the metal sealing seat (11) is provided with a sealing surface which is matched with the ball body (1), the right end surface is positioned in the lower pressure cavity (16), a plurality of annular convex rings are axially arranged on the inner annular surface of the metal sealing seat (11), and annular grooves (15) are arranged on the soft sealing ring (4) at the corresponding positions of the annular convex rings.

2. A new valve seat of a ball valve according to claim 1, characterized in that a U-shaped groove (18) is formed horizontally on the right side of the vertical rod, and the lower side wall of the U-shaped groove (18) is formed with a small hole communicating with the through hole (17).

3. A new seat for a ball valve according to claim 1 or 2, characterized in that the upper end surface of the lever (5) has a curvature, the thickness of the right end being greater than the thickness of the left end.