CN219263236U

CN219263236U - Valve rod and valve body hard seal connection structure

Info

Publication number: CN219263236U
Application number: CN202223177250.1U
Authority: CN
Inventors: 吴俊伟; 黎玉飞; 吴斌; 何永强
Original assignee: Suzhou Antway Industrial Intelligent Technology Co ltd
Current assignee: Suzhou Antway Industrial Intelligent Technology Co ltd
Priority date: 2022-11-29
Filing date: 2022-11-29
Publication date: 2023-06-27
Anticipated expiration: 2032-11-29

Abstract

The utility model discloses a hard sealing connection structure of a valve rod and a valve body, which comprises a left valve body, a right valve body and a middle valve body arranged between the left valve body and the right valve body, wherein a medium flow channel for accommodating a ball body is formed between the left valve body and the right valve body, the upper part of the middle valve body is penetrated and provided with the valve rod for connecting the ball body, the lower part of the valve rod is provided with a shaft shoulder, the inner wall of the middle valve body is provided with a ring groove matched with the shaft shoulder, the circumference of the surface of the shaft shoulder, which is close to a shaft neck, is provided with a sinking groove, and the periphery of the sinking groove is provided with a hardening treatment surface which is abutted against the ring groove. The utility model realizes the hard sealing connection between the shaft shoulder position of the valve rod and the valve body, increases specific pressure, and increases a sealing structure before a medium contacts with the filler.

Description

Valve rod and valve body hard seal connection structure

Technical Field

The utility model belongs to the technical field of ball valves, and particularly relates to a hard sealing connection structure of a valve rod and a valve body.

Background

Ball valves are widely applied to industries such as petroleum refining, long-distance pipeline, chemical industry, papermaking, pharmacy, water conservancy, electric power, municipal administration, steel and the like, and take a significant role in national economy. Ball valves are used in pipelines mainly for cutting off, distributing and changing the flow direction of a medium, and can be tightly closed only by rotating the ball valve by 90 degrees and small rotating moment. However, the existing ball valve is complex in structure and more in small parts, so that the leakage point of the valve is increased, and the possibility of leakage of the valve is increased.

The prior patent number is CN201921305314.7, discloses a fixed ball valve with a fly-out prevention valve rod, the valve rod and the side part of a connecting disc are fixedly connected through a flat key, the flat key further fixes the valve rod, the valve rod is prevented from flying out in the rotating process, and the shaft shoulder position of the valve rod is utilized to be matched with the valve body to prevent the fly-out. The existing valve rod is matched with the valve body through shaft shoulder matching to be of conventional design, and leakage points often exist before media enter the filler.

Disclosure of Invention

The utility model aims to solve the technical problems, and provides a hard sealing connection structure of a valve rod and a valve body, so that the shaft shoulder position of the valve rod is in hard sealing connection with the valve body, the specific pressure is increased, and the sealing structure is increased before a medium contacts with a filler. In order to achieve the above purpose, the technical scheme of the utility model is as follows:

the utility model provides a valve rod and valve body hard seal connection structure, includes left valve body, right valve body and sets up in the well valve body between left valve body and right valve body, form the spheroidal medium runner of holding between left valve body and the right valve body, the upper portion of well valve body runs through and is provided with the spheroidal valve rod of connection, the lower part of valve rod is provided with the shaft shoulder, the inner wall of well valve body is provided with the annular of cooperation shaft shoulder, the circumference that the shaft shoulder surface is close to the journal is provided with the heavy groove, the periphery of heavy groove is provided with the hardening surface that supports and lean on the annular.

Specifically, the lower part of well valve body runs through and is provided with the pivot of connection spheroid, the bottom of well valve body is provided with the lower lid that covers the pivot.

Specifically, the circumference of the left valve body is fixedly connected with the middle valve body through a plurality of first bolts, and the circumference of the right valve body is fixedly connected with the middle valve body through a plurality of second bolts.

Specifically, the side of left valve body is provided with the left step portion of valve body in the cooperation, the side of right valve body is provided with the right step portion of valve body in the cooperation, one side assembly of well valve body is in left step portion, the opposite side assembly of well valve body is in right step portion.

Specifically, a first sealing ring is arranged between the middle valve body and the left step part, and a second sealing ring is arranged between the middle valve body and the right step part.

Specifically, the bottom of well valve body is provided with the pivot hole that is used for installing the pivot, the top of lower lid imbeds in the pivot hole and supports and lean on the pivot.

Specifically, the circumference of lower lid is fixed with the bottom of well valve body through a plurality of third bolted connection.

Specifically, a packing groove for installing packing is arranged between the top end of the middle valve body and the valve rod, and the packing groove is positioned above the shaft shoulder.

Compared with the prior art, the valve rod and valve body hard sealing connection structure has the following main beneficial effects:

the packing is directly arranged at the top of the middle valve body, so that the structure of a traditional gland flange is eliminated, and leakage points are reduced; the valve rod is provided with a shaft shoulder, and the valve body structure in the shaft shoulder is matched, so that the risk of blowing out the valve rod during operation is effectively prevented; the shaft shoulder is provided with a sinking groove, the specific pressure of the valve body in the shaft shoulder contact is increased, and the hardening treatment surface is simultaneously arranged as a connecting point of the valve body in the shaft shoulder contact, so that the sealing performance can be effectively improved at the connecting point, and the medium can realize one sealing before contacting the filler; the integral ball valve is simple in structure and assembly, convenient to use and good in sealing effect.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of the present embodiment;

FIG. 3 is an enlarged schematic view of a partial cross section of a shoulder of the present embodiment;

FIG. 4 is a schematic partial cross-sectional view of a valve seat assembly according to the present embodiment;

the figures represent the numbers:

a left valve body 1, a first bolt 11, a left step part 12, a first sealing ring 13, a right valve body 2, a second bolt 21, a right step part 22, a second sealing ring 23, a middle valve body 3, a lower cover body 31, a ball 4, a pivot 41, a third bolt 42 the third sealing ring 43, the valve rod 5, the shaft shoulder 51, the ring groove 52, the journal 53, the sinking groove 54, the hardening surface 55, the packing 6, the pressing sleeve 61, the pressing plate 62, the valve seat 7, the seat 71, the sealing ring 72, the pressing ring 73 and the disc spring 74.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely, but is apparent to those skilled in the art in view of the present utility model.

Examples:

referring to fig. 1-4, the present embodiment is a hard sealing connection structure of a valve rod and a valve body, comprising a left valve body 1, a right valve body 2, and a middle valve body 3 disposed between the left valve body 1 and the right valve body 2, wherein a medium flow channel for accommodating a ball 4 is formed between the left valve body 1 and the right valve body 2, the upper portion of the middle valve body 3 is provided with a valve rod 5 for connecting the ball 4, the lower portion of the valve rod 5 is provided with a shaft shoulder 51, the inner wall of the middle valve body 3 is provided with a ring groove 52 for matching with the shaft shoulder 51, a sink groove 54 is disposed on the surface of the shaft shoulder 51 near the circumference of a shaft neck 53, and a hardening surface 55 abutting against the ring groove 52 is disposed on the periphery of the sink groove 54. The sinking groove 54 is arranged between the shaft shoulder 51 and the middle valve body 3, so that the specific pressure of the shaft shoulder 51 contacting the middle valve body 3 is increased, and the hardening surface 55 is arranged as a connecting point of the shaft shoulder 51 contacting the middle valve body 3, so that the sealing performance can be effectively improved.

In this embodiment, the left valve body 1, the right valve body 2 and the middle valve body 3 form a sealing structure of a medium flow passage. The lower part of the middle valve body 3 is provided with a pivot 41 connected with the sphere 4 in a penetrating way, and the bottom end of the middle valve body 3 is provided with a lower cover body 31 covering the pivot 41. The bottom end portion of the valve stem 5 is fitted into the top end of the ball 4, and the top end portion of the pivot 41 is fitted into the bottom end of the ball 4. The ball 4 is internally provided with a through port, and when the valve rod 5 is forced to rotate, the ball 4 is driven to rotate so as to realize the opening and closing of the medium flow passage.

The circumference of the left valve body 1 is fixedly connected with the middle valve body 3 through a plurality of first bolts 11. The circumference of the right valve body 2 is fixedly connected with the middle valve body 3 through a plurality of second bolts 21. Correspondingly, the left side of the left valve body 1 is provided with a left step 12 of the middle valve body 3, the right side of the right valve body 2 is provided with a right step 22 of the middle valve body 3, one side of the middle valve body 3 is assembled on the left step 12, and the other side of the middle valve body 3 is assembled on the right step 22. A first sealing ring 13 is arranged between the middle valve body 3 and the left step part 12. A second sealing ring 23 is arranged between the middle valve body 3 and the right step part 22. The left valve body 1 and the right valve body 2 can be assembled and matched with the middle valve body 3 quickly, so that the assembly difficulty is reduced.

The bottom of well valve body 3 is provided with the pivot hole that is used for installing pivot 41, and the top of lower lid 41 imbeds in the pivot hole and supports pivot 41, and the circumference of lower lid 41 is fixed through a plurality of third bolts 42 connection with the bottom of well valve body 3, and correspondingly, in order to guarantee the sealing performance of lower lid 41, be provided with third sealing washer 43 between lower lid 41 and the well valve body 4.

A packing groove for installing packing 6 is arranged between the top end of the middle valve body 3 and the valve rod 5, the packing groove is positioned above the shaft shoulder 51, a pressing sleeve 61 for pressing the packing 6 is sleeved on the upper portion of the valve rod 5, and a pressing plate 62 sleeved on the valve rod 6 is arranged on the top of the pressing sleeve 61. The filler 6 is positioned behind the shaft shoulder 51, and the medium overflowed from the medium flow channel is sealed and blocked by the hardening surface 55 before reaching the filler 6, so that the sealing performance is improved.

The inner walls of the left valve body 1 and the right valve body 2, which are positioned in the medium flow passage, are respectively provided with a valve seat assembly abutted against the ball body 4, the valve seat assembly comprises a valve seat 7 abutted against the ball body 4, a seat groove 71 is circumferentially arranged on the end face, deviating from the ball body 4, of the valve seat 7, a sealing ring 72 and a compression ring 73 are arranged in the seat groove, a disc spring 74 is arranged between the end face of the valve seat 7 and the left valve body 1 or the right valve body 2, the outer ring diameter of the disc spring 74 is consistent with the outer ring diameter of the compression ring 73, and the inner ring diameter of the disc spring 74 is smaller than the inner ring diameter of the seat groove 71. The valve seat components are arranged on two sides of the sphere 4, so that effective sealing in the rotation process of the sphere 4 is realized.

When the embodiment is applied, the packing 6 is directly arranged at the top of the middle valve body 3, the structure of a traditional gland flange is canceled, and leakage points are reduced; the valve rod 5 is provided with the shaft shoulder 51, and the valve body 3 is structurally matched with the shaft shoulder 51, so that the risk of blowout of the valve rod 5 during operation is effectively prevented; the shaft shoulder 51 is provided with the sinking groove 54, the specific pressure of the valve body 3 in the contact of the shaft shoulder 51 is increased, and the hardening surface 55 is arranged as a connecting point of the valve body 3 in the contact of the shaft shoulder 51, so that the sealing performance can be effectively improved, and the medium can be sealed before contacting the filler 6; the integral ball valve is simple in structure and assembly, convenient to use and good in sealing effect.

In the description of the present utility model, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present utility model are described above, the embodiments are only used for facilitating understanding of the present utility model, and are not intended to limit the present utility model. Any person skilled in the art can make any modification and variation in form and detail without departing from the spirit and scope of the present disclosure, but the scope of the present disclosure is to be determined by the appended claims.

Claims

1. The utility model provides a valve rod and valve body hard seal connection structure, includes left valve body, right valve body, and sets up in the well valve body between left valve body and right valve body, form the spheroidal medium runner of holding between left valve body and the right valve body, its characterized in that: the upper portion of well valve body runs through and is provided with the valve rod of connection spheroid, the lower part of valve rod is provided with the shoulder, the inner wall of well valve body is provided with the annular of cooperation shoulder, the shoulder surface is provided with the heavy groove near the circumference of axle journal, the periphery of heavy groove is provided with the hardening surface that supports and leans on the annular.

2. A valve stem and valve body hard seal connection according to claim 1, wherein: the lower part of the middle valve body is provided with a pivot which is connected with the ball body in a penetrating way, and the bottom end of the middle valve body is provided with a lower cover body which covers the pivot.

3. A valve stem and valve body hard seal connection according to claim 1, wherein: the circumference of the left valve body is fixedly connected with the middle valve body through a plurality of first bolts, and the circumference of the right valve body is fixedly connected with the middle valve body through a plurality of second bolts.

4. A valve stem and valve body hard seal connection according to claim 1, wherein: the side of left valve body is provided with the left step portion of valve body in the cooperation, the side of right valve body is provided with the right step portion of valve body in the cooperation, one side of well valve body is assembled at left step portion, the opposite side of well valve body is assembled at right step portion.

5. A valve stem and valve body hard seal connection as defined in claim 4 wherein: a first sealing ring is arranged between the middle valve body and the left step part, and a second sealing ring is arranged between the middle valve body and the right step part.

6. A valve stem and valve body hard seal connection as defined in claim 2 wherein: the bottom of well valve body is provided with the pivot hole that is used for installing the pivot, the top of lower lid imbeds in the pivot hole and supports and lean on the pivot.

7. A valve stem and valve body hard seal connection as defined in claim 2 wherein: the circumference of the lower cover body is fixedly connected with the bottom end of the middle valve body through a plurality of third bolts.

8. A valve stem and valve body hard seal connection according to claim 1, wherein: a packing groove for installing packing is arranged between the top end of the middle valve body and the valve rod, and the packing groove is positioned above the shaft shoulder.