CN207470909U - A kind of valve rod leak-proof structure - Google Patents
A kind of valve rod leak-proof structure Download PDFInfo
- Publication number
- CN207470909U CN207470909U CN201721514691.2U CN201721514691U CN207470909U CN 207470909 U CN207470909 U CN 207470909U CN 201721514691 U CN201721514691 U CN 201721514691U CN 207470909 U CN207470909 U CN 207470909U
- Authority
- CN
- China
- Prior art keywords
- valve rod
- sealing
- valve
- proof structure
- hydraulic cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Details Of Valves (AREA)
- Lift Valve (AREA)
Abstract
The utility model discloses a kind of valve rod leak-proof structures, including valve rod and the valve stem sleeve being sheathed on outside valve rod, lower part on the inside of the valve stem sleeve is equipped with retainer ring, the top of the retainer ring is equipped with the annular hydraulic cylinder and annular hydraulic cylinder that can be stretched in a longitudinal direction and is sheathed on outside valve rod, the annular hydraulic cylinder includes the annular piston that top has the circular cylinder of opening and is fitted in circular cylinder, the support ring of circular cylinder can be covered by being fixed at the top of the annular piston, the top of the support ring is equipped with sealing, the sealing cover for compressing sealing is equipped at the top of the valve stem sleeve, the annular hydraulic cylinder is connect with valve inlet medium.The technical purpose of the utility model is to provide a kind of sealing performance higher valve rod leak-proof structure.
Description
Technical field
The utility model belongs to valve technology field, more particularly to a kind of valve rod leak-proof structure.
Background technology
Valve is widely used in petroleum refining, long-distance transport pipes, chemical industry, papermaking, pharmacy, water conservancy, electric power, municipal administration, steel
The industries such as iron, and existing client is higher and higher to the reliability and safety requirement of valve, relevant criterion is also increasingly stringenter.
And existing valve often has leakage in the position of the valve stem seal of valve, and particularly in conveying high-pressure high-temperature medium, valve
Valve stem seal often reveal after a longer time of use, and seal reliability it is not high, it is therefore desirable to it is close to valve rod
Envelope is designed from new.
Utility model content
The technical purpose of the utility model is to provide a kind of sealing performance higher valve rod leak-proof structure.
The utility model is achieved through the following technical solutions：
The valve rod leak-proof structure of the utility model, including:Valve rod and the valve stem sleeve being sheathed on outside valve rod, in the valve stem sleeve
The lower part of side is equipped with retainer ring, and the top of the retainer ring is equipped with the annular hydraulic cylinder that can be stretched in a longitudinal direction and annular
Hydraulic cylinder is set on outside valve rod, and the annular hydraulic cylinder, which includes top, to be had the circular cylinder of opening and be fitted to annular cylinder
Internal annular piston is fixed with the support ring that can cover circular cylinder, the support ring at the top of the annular piston
Top be equipped with sealing, the sealing cover for compressing sealing, the annular hydraulic cylinder and valve are equipped at the top of the valve stem sleeve
Door import medium connection.
The valve rod leak-proof structure of the utility model, it is zigzag close that the sealing, which includes the section that elastic metallic is made,
Skeleton is sealed, inner seal ring is equipped between the dog-ear and valve rod of the sealing framework, outer seal ring is equipped between dog-ear and valve stem sleeve.
The valve rod leak-proof structure of the utility model, the lower part of the valve stem sleeve are equipped with expansion section, the support ring and annular
Hydraulic cylinder is set in expansion section.
The valve rod leak-proof structure of the utility model, the angle of the dog-ear is 25~35 °.
It is respectively equipped at least on the sealing surface of the valve rod leak-proof structure of the utility model, the inner seal ring and outer seal ring
One groove is equipped with rubber seal in the groove.
The material of the valve rod leak-proof structure of the utility model, the inner seal ring and outer seal ring is PTFE.
The beneficial effects of the utility model are：
Can be when pumped (conveying) medium pressure to be larger by the hydraulically extensible cylinder being equipped with, the pressure of medium can push annular work
Plug so that support ring so that the sealing framework of sealing is compressed, presses the pressure bigger of sealing so that sealing
Power increases, can to improve the reliability of sealing, the inner seal ring and outside sealing ring of sealing and the rubber seal being equipped with
So that sealing performance is more preferable, this novel valve rod leak-proof structure enables to the frictional force of rotation and the axial movement of valve rod more
It is small, and enable to valve rod that can act in two directions, valve range applicatory is wide.
Description of the drawings
Fig. 1 is the structure diagram of valve stem seal；
Fig. 2 is the structure diagram of sealing.
Specific embodiment
The utility model is described in detail below in conjunction with the accompanying drawings.
Purpose, technical scheme and advantage to make the utility model embodiment are clearer, new below in conjunction with this practicality
The technical solution in embodiment is clearly and completely described in attached drawing in type embodiment, and following embodiment is used to illustrate this
Utility model, but be not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that term " on ", " under ", "front", "rear", "left", "right",
The orientation or position relationship of the instructions such as " vertical ", " interior ", " outer " be based on orientation shown in the drawings or position relationship, merely to
Convenient for description the utility model and simplified description rather than instruction or imply that signified device or element must be with specific sides
Position, with specific azimuth configuration and operation, therefore it is not intended that limitation to the utility model.
Valve rod leak-proof structure as shown in Figure 1 to Figure 2, including:Valve rod 1 and the valve stem sleeve 2 being sheathed on outside valve rod 1, it is described
The lower part of 2 inside of valve stem sleeve is equipped with retainer ring 4, and retainer ring 4 plays the supporting role to annular hydraulic bar 5, the retainer ring 4
Top is equipped with the annular hydraulic cylinder 5 that can be stretched in a longitudinal direction and annular hydraulic cylinder 5 is sheathed on outside valve rod 1, the annular
Hydraulic cylinder 5 includes the annular piston 502 that top has the circular cylinder 501 of opening and is fitted in circular cylinder 501, institute
The top for stating annular piston 502 is fixed with the support ring 503 that can cover circular cylinder 501, annular piston 502 and support ring
503 are set as integral structure, and the top of the support ring 503 is equipped with sealing 3, and 2 top of valve stem sleeve is equipped with to compress
The sealing cover 6 of sealing 3, the annular hydraulic cylinder 5 are connect with valve inlet medium.
The sealing 3 includes the section made of elastic metallic for zigzag sealing framework 301, the sealing framework
Inner seal ring 303 is equipped between 301 dog-ear 302 and valve rod 1, outer seal ring 304 is equipped between dog-ear 302 and valve stem sleeve 2.Institute
Dog-ear 302 is stated as acute angle, is 25~35 °, so as to reduce the length of installation sealing 3.The inner seal ring 303 and outer close
At least one groove is respectively equipped on the sealing surface of seal ring 304, is equipped with rubber seal 305 in the groove, groove and close
The quantity of seal 305 may be configured as 2~3, to improve its sealing reliability.The inner seal ring 303 and outer seal ring 304
Material is PTFE.
The lower part of the valve stem sleeve 2 is equipped with expansion section 201, and the support ring 503 and annular hydraulic cylinder 5 are set on expansion section
In 201, so as to increase pressure of the hydraulically extensible cylinder to sealing, size can be arranged as required in implementation process.
It can be seen that the valve rod leak-proof structure so that sealing performance is more preferable, at a higher pressure, it can reach and not reveal substantially
Technique effect.
The above is only the preferred embodiment of the utility model, and not the utility model is made in any form
Limitation although the utility model has been disclosed with preferred embodiment as above, is not limited to the utility model, any to be familiar with
The technical staff of this patent is not being departed from the range of technical solutions of the utility model, when the technology contents work using above-mentioned prompting
Go out a little change or be modified to the equivalent embodiment of equivalent variations, as long as being the content without departing from technical solutions of the utility model,
According to any simple modification, equivalent change and modification that the technical essence of the utility model makees above example, still belong to
In the range of the utility model.
Claims (6)
1. a kind of valve rod leak-proof structure, which is characterized in that including:Valve rod (1) and it is sheathed on the valve stem sleeve (2) of valve rod (1) outside, institute
It states the lower part on the inside of valve stem sleeve (2) and is equipped with retainer ring (4), the top of the retainer ring (4) is equipped with and can stretch in a longitudinal direction
The annular hydraulic cylinder (5) and annular hydraulic cylinder (5) of contracting are sheathed on valve rod (1) outside, and the annular hydraulic cylinder (5) has including top
The circular cylinder (501) of opening and the annular piston (502) being fitted in circular cylinder (501), the annular piston
(502) support ring (503) of circular cylinder (501) can be covered by being fixed at the top of, be set at the top of the support ring (503)
There is sealing (3), the sealing cover (6) for compressing sealing (3), the annular hydraulic cylinder are equipped at the top of the valve stem sleeve (2)
(5) it is connect with valve inlet medium.
2. valve rod leak-proof structure according to claim 1, which is characterized in that the sealing (3) is done including elastic metallic
Into section for zigzag sealing framework (301), be equipped between the dog-ear (302) of the sealing framework (301) and valve rod (1)
Inner seal ring (303) is equipped with outer seal ring (304) between dog-ear (302) and valve stem sleeve (2).
3. valve rod leak-proof structure according to claim 1, which is characterized in that the lower part of the valve stem sleeve (2), which is equipped with, to be expanded
Portion (201), the support ring (503) and annular hydraulic cylinder (5) are in expansion section (201).
4. valve rod leak-proof structure according to claim 2, which is characterized in that the angle of the dog-ear (302) for 25~
35°。
5. valve rod leak-proof structure according to claim 2, which is characterized in that the inner seal ring (303) and outer seal ring
(304) at least one groove is respectively equipped on sealing surface, rubber seal (305) is equipped in the groove.
6. valve rod leak-proof structure according to claim 5, which is characterized in that the inner seal ring (303) and outer seal ring
(304) material is PTFE.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721514691.2U CN207470909U (en) | 2017-11-14 | 2017-11-14 | A kind of valve rod leak-proof structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721514691.2U CN207470909U (en) | 2017-11-14 | 2017-11-14 | A kind of valve rod leak-proof structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207470909U true CN207470909U (en) | 2018-06-08 |
Family
ID=62260424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721514691.2U Expired - Fee Related CN207470909U (en) | 2017-11-14 | 2017-11-14 | A kind of valve rod leak-proof structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207470909U (en) |
-
2017
- 2017-11-14 CN CN201721514691.2U patent/CN207470909U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180608 Termination date: 20181114 |