CN212106962U

CN212106962U - Five-dimensional eccentric valve fireproof sealing structure

Info

Publication number: CN212106962U
Application number: CN201922407580.7U
Authority: CN
Inventors: 谢文学
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-28
Filing date: 2019-12-28
Publication date: 2020-12-08
Anticipated expiration: 2029-12-28

Abstract

The utility model relates to a five-dimensional eccentric valve fire prevention seal structure. The valve comprises a valve body, a valve rod and an opening and closing part, wherein a sealing ring is arranged on one side of the opening and closing part, a valve seat is arranged in the valve body, a lifting ring is arranged on the outer side of the valve seat, a concave cavity is arranged on the inner end face of the valve seat, an annular polytetrafluoroethylene block is arranged in the concave cavity, the valve seat and the annular polytetrafluoroethylene block and the sealing ring are closed to form a sealing face, the sealing face is a chamfered elliptic cone perfect circle sealing face, the sealing face is an arc-shaped sealing face, the sealing face is a part of an inclined elliptic cone which is inclined relative to the central line of a valve flow passage, a plane where the vertex of the inclined elliptic cone and the minor axis of the elliptic bottom face are located is coplanar with the central line of the valve flow passage and perpendicular to the central line of the valve rod shaft, an. The utility model discloses simple structure opens and close moment little, long service life has the high sealing performance of fire prevention.

Description

Five-dimensional eccentric valve fireproof sealing structure

Technical Field

The utility model relates to a valve especially relates to a five-dimensional eccentric valve fire prevention seal structure.

Background

The ball valve and the butterfly valve are two kinds of valves which are most widely applied and used in the prior valves, are simple and easy to operate, and play a role in stopping and cutting off pipeline media. Ball valve, the open-close piece (ball) is driven by the valve rod and rotates around the axis of the ball valve. The hard seal V-shaped ball valve can also be used for regulating and controlling fluid, wherein a V-shaped ball core of the hard seal V-shaped ball valve and a metal valve seat of the build-up welding hard alloy have strong shearing force, and the hard seal V-shaped ball valve is particularly suitable for media containing fibers, tiny solid particles and the like. The multi-way ball valve can flexibly control the confluence, the diversion and the switching of the flow direction of the medium on the pipeline, and can close any channel to connect the other two channels. The valve of this type should be generally installed horizontally in the pipeline. The ball valve is divided into: pneumatic ball valves, electric ball valves, manual ball valves. The butterfly valve is also called flap valve, is a simple regulating valve, mainly composed of valve body, valve rod, butterfly plate and sealing ring. The valve body is cylindrical, the axial length is short, and a butterfly plate is arranged in the valve body. The existing butterfly plate or ball valve has the disadvantages of serious abrasion, large bearing pressure, poor sealing performance, large opening and closing moment and short service life; in addition, the sealing surface of the existing butterfly plate or ball valve is easy to deform under the condition of high temperature in a fire scene, so that inflammable liquid flows to cause the fire to be enlarged continuously, and even explosion accidents occur.

SUMMERY OF THE UTILITY MODEL

To the above defect, the utility model aims to provide a simple structure reduces and opens and close moment, and long service life has a five-dimensional eccentric valve fire prevention seal structure of the high leakproofness ability of preventing fires.

Therefore, the utility model adopts the technical proposal that:

the valve comprises a valve body, a valve rod and an opening and closing part, wherein the opening and closing part is positioned in the valve body, the valve rod is connected with the opening and closing part, one side of the opening and closing part is provided with an annular step, a sealing ring is arranged on the annular step, the sealing ring is fixed on the opening and closing part through a pressing ring, a valve seat is arranged in the valve body, the inner wall of the valve body is provided with an annular boss, the valve seat is placed at the annular boss, the outer side of the valve seat is provided with a lifting ring arranged in the valve body, the periphery of the outer end surface of the lifting ring is provided with bolts penetrating through the lifting ring, the front end of each bolt is abutted against the outer end surface of the valve seat, the inner end surface of the valve seat is provided with a concave cavity, an annular tetrafluoro block is arranged in the concave cavity, the valve seat and the annular tetrafluoro block are closed, the vertex of the inclined elliptical cone and the short axis of the elliptical bottom surface of the inclined elliptical cone are located on the same plane with the central line of the valve flow channel and are perpendicular to the central line of the valve rod shaft, the central line of the valve rod shaft and the central line of the valve flow channel are eccentrically arranged, the vertex of the inclined elliptical cone and the central line of the valve flow channel are eccentrically arranged, the radial section of the right circular sealing surface of the inclined elliptical cone is a right circular section, the center of the right circular section and the central line of the valve flow channel are eccentrically arranged, the center of the right circular section is located on the central line of the cone in the inclined elliptical cone, the intersection line of the plane where the vertex of the inclined elliptical cone and the short axis of the elliptical bottom surface of the inclined elliptical cone are located and the arc-shaped sealing surface is a sealing arc line, the.

As a further improvement of the technical scheme, the opening and closing piece is a butterfly plate.

As a further improvement of the above technical solution, the opening and closing member is a ball.

The utility model has the advantages that:

the utility model discloses simple structure, through adopting the utility model discloses structure, adopt five dimensions eccentric, every radial cross section of sealed face is the perfect circle cross section, and the seal line of axial cross section is the pitch arc, has solved sealed face each point pressurized inhomogeneity problem, realizes that high temperature low temperature leads to because of the sealed face atress inequality warp the leakage problem, can realize reducing the start-stop moment, sealing performance is good, extension valve life; through set up annular tetrafluoro piece and sealing ring and cooperate in the disk seat, can keep high sealing performance at the conflagration scene, avoid inflammable liquid to trickle to the conflagration scene, the security performance is high.

Drawings

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

Fig. 2 is a partially enlarged view of a in fig. 1.

In the figure, 1 is a valve body, 2 is a valve rod, 3 is a starting and closing member, 4 is a sealing ring, 5 is a pressing ring, 6 is a valve seat, 7 is an annular boss, 8 is a hanging ring, 9 is a bolt, 10 is an annular tetrafluoro block, 11 is a valve runner central line, 12 is an inclined elliptic cone vertex, 13 is a valve rod shaft central line, and 14 is a cone central line.

Detailed Description

A five-dimensional eccentric valve fireproof sealing structure comprises a valve body 1, a valve rod 2 and an opening and closing part 3, wherein the opening and closing part 3 is positioned in the valve body 1, the valve rod 2 is connected with the opening and closing part 3, one side of the opening and closing part 3 is provided with an annular step, a sealing ring 4 is installed on the annular step, the sealing ring 4 is fixed on the opening and closing part 3 through a pressing ring 5, a valve seat 6 is arranged in the valve body 1, the inner wall of the valve body 1 is provided with an annular boss 7, the valve seat 6 is placed at the annular boss 7, the outer side of the valve seat 6 is provided with a lifting ring 8 installed in the valve body 1, the periphery of the outer end face of the lifting ring 8 is provided with a bolt 9 penetrating through the lifting ring 8, the front end of the bolt 9 is abutted against the outer end face of the valve seat 6, the inner end face of the valve seat 6 is provided with, the sealing surface is a beveled elliptic cone perfect circle sealing surface, the sealing surface is an arc sealing surface, the sealing surface is a part of a beveled elliptic cone which is inclined relative to the central line 11 of the valve runner, the plane where the vertex 12 of the beveled elliptic cone and the minor axis of the elliptical bottom surface of the beveled elliptic cone are located is coplanar with the central line 11 of the valve runner and is vertical to the central line 13 of the valve rod shaft, the central line 13 of the valve rod shaft is eccentric to the central line 11 of the valve runner, the vertex 12 of the beveled elliptic cone is eccentric to the central line 11 of the valve runner, the radial section of the beveled elliptic cone perfect circle sealing surface is a perfect circle section, the center of the perfect circle section is eccentric to the central line 11 of the valve runner, the center of the perfect circle section is located on the central line 14 of the beveled elliptic cone, the intersecting line of the plane where the vertex 12 of the beveled elliptic cone, the diameter size of the right circular section is gradually reduced from one side close to the valve rod 2 to one side far away from the valve rod 2, and the center of the sealing arc line is eccentrically arranged with the top point 12 of the inclined elliptic cone.

As a further improvement of the above technical solution, the opening and closing member 3 is a butterfly plate.

As a further improvement of the above technical solution, the opening and closing member 3 is a sphere.

By adopting the structure of the utility model, five-dimensional eccentricity is adopted, each radial section of the sealing surface is a perfect circle section, and the sealing line of the axial section is an arc line, so that the problem of non-uniformity of each point of the sealing surface under pressure is solved, the problem of deformation and leakage caused by non-uniform stress of the sealing surface at high temperature and low temperature is realized, the opening and closing torque can be reduced, the sealing performance is good, and the service life of the valve is prolonged; through set up annular tetrafluoro piece and sealing ring and cooperate in the disk seat, can keep high sealing performance at the conflagration scene, avoid inflammable liquid to trickle to the conflagration scene, the security performance is high.

It is to be emphasized that: the above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A five-dimensional eccentric valve fireproof sealing structure comprises a valve body, a valve rod and an opening and closing piece, wherein the opening and closing piece is positioned in the valve body, the valve rod is connected with the opening and closing piece, one side of the opening and closing piece is provided with an annular step, a sealing ring is arranged on the annular step and is fixed on the opening and closing piece through a pressing ring, a valve seat is arranged in the valve body, the inner wall of the valve body is provided with an annular boss, the valve seat is placed at the annular boss, the outer side of the valve seat is provided with a lifting ring arranged in the valve body, the periphery of the outer end face of the lifting ring is provided with bolts penetrating through the lifting ring, the front ends of the bolts are abutted against the outer end face of the valve seat, the inner end face of the valve seat is provided with a concave cavity, the concave cavity is internally provided with an annular tetrafluoro block, the, the sealing surface is a part of an inclined elliptic cone which is inclined relative to the central line of the valve flow passage, the plane where the vertex of the inclined elliptic cone and the minor axis of the bottom surface of the inclined elliptic cone are located is coplanar with the central line of the valve flow passage and is vertical to the central line of a valve rod shaft, the central line of the valve rod shaft and the central line of the valve flow passage are eccentrically arranged, the vertex of the inclined elliptic cone and the central line of the valve flow passage are eccentrically arranged, the radial section of the circular sealing surface of the inclined elliptic cone is a perfect circular section, the center of the perfect circular section is eccentrically arranged with the central line of the valve flow passage, the center of the perfect circular section is located on the central line of the inclined elliptic cone, the intersecting line of the plane where the vertex of the inclined elliptic cone and the minor axis of the bottom surface of the inclined elliptic cone are intersected with the arc-shaped sealing surface is a sealing arc line.

2. The five-dimensional eccentric valve fireproof sealing structure according to claim 1, wherein the opening and closing piece is a butterfly plate.

3. The five-dimensional eccentric valve fireproof sealing structure according to claim 1, wherein the opening and closing member is a ball.