CN204573305U - A kind of valve rod leak-proof structure of New Type of Cryogenic Ball Valve - Google Patents
A kind of valve rod leak-proof structure of New Type of Cryogenic Ball Valve Download PDFInfo
- Publication number
- CN204573305U CN204573305U CN201520145958.XU CN201520145958U CN204573305U CN 204573305 U CN204573305 U CN 204573305U CN 201520145958 U CN201520145958 U CN 201520145958U CN 204573305 U CN204573305 U CN 204573305U
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- China
- Prior art keywords
- valve rod
- valve
- stuffing box
- box packing
- proof structure
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Abstract
The utility model discloses a kind of valve rod leak-proof structure of New Type of Cryogenic Ball Valve, this pneumatic ball valve comprises valve rod and valve gap, this valve rod is rotated and is installed on valve gap and is coordinated by seal arrangement with between valve gap, described seal arrangement comprises a stuffing box packing cylinder, clamping cylinder, counterbalance spring and locking nut, described stuffing box packing jacket casing is contained on valve rod and the outer wall of stuffing box packing cylinder and valve gap inner hole wall are sealed and matched, at least one ring-type breach is provided with on the inner tube wall of sealing filling tube He on outer tube wall, described clamping cylinder to be set on valve rod and to be positioned at the top of stuffing box packing cylinder, this counterbalance spring to be set on valve rod and to apply stuffing box packing cylinder one equilibrant force, described locking nut screw thread to be installed on valve rod and to compress described clamping cylinder.This valve rod leak-proof structure is relatively more reasonable, uses component few, and institute takes up space little, and sealability is better, and cost reduces.
Description
Technical field
The utility model relates to a kind of valve rod leak-proof structure, refers to a kind of valve rod leak-proof structure of New Type of Cryogenic Ball Valve especially.
Background technique
The valve stem seal of current cryogenic ball valve is following structure: valve gap is provided with the mounting hole facilitating valve rod to run through, valve rod is installed in mounting hole, V-arrangement filler is filled with in this mounting hole, simultaneously, Compress Spring is provided with between the below of V-arrangement filler and valve gap, be positioned in mounting hole above V-arrangement filler and be provided with filler pressing sleeve, filler pressing sleeve to be set on valve rod and to compress described V-arrangement filler, simultaneously, valve rod is also set with pressing plate, this pressing plate is connected with valve gap end-face helical by bolt, thus make pressing plate compress described filler pressing sleeve, and be sealed and matched by O-ring seals between the inner peripheral surface of filler pressing sleeve and valve rod.Above-mentioned valve rod leak-proof structure more complicated, the component of combination are more, and the physical dimension taken is large, and processing cost is higher.
Model utility content
Technical problem to be solved in the utility model is: the valve rod leak-proof structure providing a kind of New Type of Cryogenic Ball Valve, and this valve rod leak-proof structure is relatively more reasonable, uses component few, and institute takes up space little, and sealability is better, and cost reduces.
For solving the problems of the technologies described above, the technical solution of the utility model is: a kind of valve rod leak-proof structure of New Type of Cryogenic Ball Valve, this pneumatic ball valve comprises valve rod and valve gap, this valve rod is rotated and is installed on valve gap and is coordinated by seal arrangement with between valve gap, described seal arrangement comprises a stuffing box packing cylinder, clamping cylinder, counterbalance spring and locking nut, described stuffing box packing jacket casing is contained on valve rod and the outer wall of stuffing box packing cylinder and valve gap inner hole wall are sealed and matched, at least one ring-type breach is provided with on the inner tube wall of sealing filling tube He on outer tube wall, described clamping cylinder to be set on valve rod and to be positioned at the top of stuffing box packing cylinder, this counterbalance spring to be set on valve rod and to apply stuffing box packing cylinder one equilibrant force, described locking nut screw thread to be installed on valve rod and to compress described clamping cylinder.
As the preferred scheme of one, described ring-type breach is V-shaped breach.
As the preferred scheme of one, described ring-type breach is U-shaped breach.
As the preferred scheme of one, described ring-type breach is trapeze cut.
As the preferred scheme of one, the ring-type breach of described inner tube wall and the ring-type breach of outer tube wall are arranged along the axis mutual dislocation of stuffing box packing cylinder.
As the preferred scheme of one, described counterbalance spring is butterfly spring, and this butterfly spring is pressed between locking nut and clamping cylinder in advance.
As the preferred scheme of one, described locking nut comprises gland nut and fastening screw nut, and this gland nut is between fastening screw nut and butterfly spring.
As the preferred scheme of one, described valve gap is provided with ladder counterbore, described gland nut, fastening screw nut and belleville spring all sink in described ladder counterbore.
After have employed technique scheme, effect of the present utility model is: this valve stem seal abandoned before structure, have employed stuffing box packing cylinder to seal, stuffing box packing cylinder is provided with annular breach, thus make stuffing box packing cylinder produce the component of the tensioner to both sides when being extruded, thus raising sealability, meanwhile, stuffing box packing cylinder utilizes nut to compress, and reduces size, component reduce, and processing cost reduces.
Again because the ring-type breach of described inner tube wall and the ring-type breach of outer tube wall are arranged along the axis mutual dislocation of stuffing box packing cylinder, like this, the amount of deformation of stuffing box packing cylinder can be larger, thus sealability is better.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is the structure sectional view of the utility model embodiment;
In accompanying drawing: 1. valve gap; 2. ladder counterbore; 3. valve rod; 4. gland nut; 5. fastening screw nut; 6. belleville spring; 7. clamping cylinder; 8. stuffing box packing cylinder; 9. annular breach.
Embodiment
Below by specific embodiment, the utility model is described in further detail.
As shown in Figure 1, a kind of valve rod 3 sealing configuration of New Type of Cryogenic Ball Valve, this pneumatic ball valve comprises valve rod 3 and valve gap 1, this valve rod 3 is rotated and is installed on valve gap 1 and is coordinated by seal arrangement with between valve gap 1, described seal arrangement comprises a stuffing box packing cylinder 8, clamping cylinder 7, counterbalance spring and locking nut, described stuffing box packing cylinder 8 is sleeved on valve rod 3 and the outer wall of stuffing box packing cylinder 8 and valve gap 1 inner hole wall are sealed and matched, at least one ring-type breach is provided with on the inner tube wall of sealing filling tube 8 He on outer tube wall, described clamping cylinder 7 to be set on valve rod 3 and to be positioned at the top of stuffing box packing cylinder 8, this counterbalance spring to be set on valve rod 3 and to apply stuffing box packing cylinder 8 one equilibrant force, described locking nut screw thread to be installed on valve rod 3 and to compress described clamping cylinder 7.
Wherein, in the present embodiment, described ring-type breach is V-shaped breach.The ring-type breach of described inner tube wall and the ring-type breach of outer tube wall are arranged along the axis mutual dislocation of stuffing box packing cylinder 8.So when stuffing box packing cylinder 8 receives axial pressure, due to the existence of V-shaped breach, so stuffing box packing cylinder 8 will produce radial component, thus forces stuffing box packing cylinder 8 to closely cooperate with valve rod 3 and valve gap 1, which improves sealability.Certainly, this annular breach 9 also can have other shape, and such as described ring-type breach is U-shaped breach.Described ring-type breach is trapeze cut, produces a radial component as long as meet.
And counterbalance spring in the present embodiment and current existing counterbalance spring also make to distinguish to some extent, existing counterbalance spring is exactly common stage clip, be installed on the below of V-arrangement filler, and counterbalance spring described in the present embodiment is butterfly spring, this butterfly spring is pressed between locking nut and clamping cylinder 7 in advance.This mounting type is fairly simple, directly applies equilibrant force to clamping cylinder 7, thus forces stuffing box packing cylinder 8 to be out of shape.
And described locking nut comprises gland nut 4 and fastening screw nut 5, this gland nut 4 is between fastening screw nut 5 and butterfly spring.Described valve gap 1 is provided with ladder counterbore 2, described gland nut 4, fastening screw nut 5 and belleville spring 6 all sink in described ladder counterbore 2, like this, facilitate the installation of other component, and the sealing configuration of whole valve rod 3 is all in valve gap 1 scope, size obviously reduces, and component reduce, at the bottom of difficulty of processing, thus reduce cost.
The above embodiment is only the description to the preferred embodiment of the present invention; not as limiting the scope of the invention; design on the basis of spirit not departing from the present invention; the various distortion make technical solution of the present invention and transformation, all should fall in protection domain that claims of the present invention determine.
Claims (8)
1. the valve rod leak-proof structure of a New Type of Cryogenic Ball Valve, ball valve comprises valve rod and valve gap, valve rod is rotated and is installed on valve gap and is coordinated by seal arrangement with between valve gap, it is characterized in that: described seal arrangement comprises a stuffing box packing cylinder, clamping cylinder, counterbalance spring and locking nut, described stuffing box packing jacket casing is contained on valve rod and the outer wall of stuffing box packing cylinder and valve gap inner hole wall are sealed and matched, at least one ring-type breach is provided with on the inner tube wall of sealing filling tube He on outer tube wall, described clamping cylinder to be set on valve rod and to be positioned at the top of stuffing box packing cylinder, this counterbalance spring to be set on valve rod and to apply stuffing box packing cylinder one equilibrant force, described locking nut screw thread to be installed on valve rod and to compress described clamping cylinder.
2. the valve rod leak-proof structure of a kind of New Type of Cryogenic Ball Valve as claimed in claim 1, is characterized in that: described ring-type breach is V-shaped breach.
3. the valve rod leak-proof structure of a kind of New Type of Cryogenic Ball Valve as claimed in claim 1, is characterized in that: described ring-type breach is U-shaped breach.
4. the valve rod leak-proof structure of a kind of New Type of Cryogenic Ball Valve as claimed in claim 1, is characterized in that: described ring-type breach is trapeze cut.
5. the valve rod leak-proof structure of a kind of New Type of Cryogenic Ball Valve as described in any one of Claims 1-4, is characterized in that: the ring-type breach of described inner tube wall and the ring-type breach of outer tube wall are arranged along the axis mutual dislocation of stuffing box packing cylinder.
6. the valve rod leak-proof structure of a kind of New Type of Cryogenic Ball Valve as claimed in claim 5, is characterized in that: described counterbalance spring is butterfly spring, and this butterfly spring is pressed between locking nut and clamping cylinder in advance.
7. the valve rod leak-proof structure of a kind of New Type of Cryogenic Ball Valve as claimed in claim 6, it is characterized in that: described locking nut comprises gland nut and fastening screw nut, this gland nut is between fastening screw nut and butterfly spring.
8. the valve rod leak-proof structure of a kind of New Type of Cryogenic Ball Valve as claimed in claim 7, is characterized in that: described valve gap is provided with ladder counterbore, described gland nut, fastening screw nut and belleville spring all sink in described ladder counterbore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520145958.XU CN204573305U (en) | 2015-03-16 | 2015-03-16 | A kind of valve rod leak-proof structure of New Type of Cryogenic Ball Valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520145958.XU CN204573305U (en) | 2015-03-16 | 2015-03-16 | A kind of valve rod leak-proof structure of New Type of Cryogenic Ball Valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204573305U true CN204573305U (en) | 2015-08-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520145958.XU Expired - Fee Related CN204573305U (en) | 2015-03-16 | 2015-03-16 | A kind of valve rod leak-proof structure of New Type of Cryogenic Ball Valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204573305U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105928776A (en) * | 2016-06-13 | 2016-09-07 | 中国石油大学(北京) | Sound emission probe mounting device for true triaxial hydraulic fracturing simulation experiment |
| CN111237629A (en) * | 2018-11-28 | 2020-06-05 | 张家港中集圣达因低温装备有限公司 | Marine natural gas storage tank |
-
2015
- 2015-03-16 CN CN201520145958.XU patent/CN204573305U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105928776A (en) * | 2016-06-13 | 2016-09-07 | 中国石油大学(北京) | Sound emission probe mounting device for true triaxial hydraulic fracturing simulation experiment |
| CN105928776B (en) * | 2016-06-13 | 2017-08-25 | 中国石油大学(北京) | A kind of acoustic emission probe erecting device for true triaxial hydraulic fracturing simulated experiment |
| CN111237629A (en) * | 2018-11-28 | 2020-06-05 | 张家港中集圣达因低温装备有限公司 | Marine natural gas storage tank |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150819 Termination date: 20200316 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |