CN205261000U - Dual stem seal structure of valve - Google Patents
Dual stem seal structure of valve Download PDFInfo
- Publication number
- CN205261000U CN205261000U CN201521018366.8U CN201521018366U CN205261000U CN 205261000 U CN205261000 U CN 205261000U CN 201521018366 U CN201521018366 U CN 201521018366U CN 205261000 U CN205261000 U CN 205261000U
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- Prior art keywords
- valve
- valve rod
- valve body
- gland
- circle
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Abstract
The utility model relates to a dual stem seal structure of valve, the valve rod is installed in vertical rotation in the shaft hole that made on valve body upper portion, and the cover is equipped with a gland on the valve body on valve rod upper portion, and coaxial cover is equipped with O shape ring support between the contact surface of valve rod and valve body, and the inside and outside circle of this O shape ring support is spacing respectively to be installed O shape and encloses, have a gasket at the axial top of O shape ring support coaxial arrangement, gasket upper end coaxial arrangement has a lip seal circle, plays the second resealing, circle the coaxial spacing gland of installing at lip seal, the gland suit is on the valve rod, and radial equipartition is installed a plurality of screws and is adorned on the valve body admittedly on the gland. This valve adopts double sealing, and first way is that O shape circle is sealed, and O shape circle damages the back, and the lip seal circle can also play sealedly, has guaranteed the sealed of valve valve rod department, has saved the maintenance cost.
Description
Technical field
The utility model belongs to valve field, relates to the valve that turns round open type, especially a kind of dual valve rod leak-proof structure of valve.
Background technology
At present, existing valve rod place is used merely seal with O ring, once sealing ring damages, just there will be leakage, need to close down pipeline and could change O shape circle, and maintenance cost is high.
Through retrieval, find the public technology of following close technical field:
A kind of metal hard sealing structure (CN204628623U) of ball-valve valve rod, comprises that lower end is fixed on the valve rod on spool, is arranged with valve gap on valve rod, on described stem lower portion circumference, offers groove, and this groove is embedded with valve rod metal O type circle; Described valve gap top offers packing groove along valve rod circumference, is filled with metal packing in packing groove, and compresses by the gland that is arranged on top. The utility model is except the parts such as valve rod, valve gap are according to routine employing metal material, the hermetically-sealed construction of valve rod, as O type circle, filler etc. all adopt metal material, the utility model has adopted all-metal sealing structure, makes corresponding ball valve can be applied to the special technique fields such as nuclear chemical industry. And the utility model rationally adopts O type circle, filler dual-seal, its good sealing effect at correct position.
Comparative analysis is known, and published patented technology and known general knowledge all exist larger technology difference compared with present patent application.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art part, the dual valve rod leak-proof structure of a kind of simple in structure, design science, good stability, the reliable valve of sealing is provided, solve prior art valve stem seal seal with O ring unreliable, the high problem of maintenance cost after damaging.
The utility model solves its technical problem and takes following technical scheme to realize:
A kind of dual valve rod leak-proof structure of valve, in the made axis hole in valve body top, be vertically rotatablely equipped with valve rod, on the valve body on valve rod top, be set with a gland, it is characterized in that: between valve rod and the contact-making surface of valve body, coaxial sleeve is equipped with an O shape ring support, the inside and outside circle of this O shape ring support respectively limit mounting has an O shape circle; Above the axial direction of O shape ring support, be coaxially installed with a pad, pad upper end is coaxially installed with a lip-type packing, plays the second resealing; In lip-type packing, coaxial limit mounting has gland, and gland is sleeved on valve rod, and on gland, radial equipartition is provided with multiple screws and is packed on valve body;
On valve rod in valve body axis hole above O shape ring support, coaxial sleeve is equipped with a pendant collet, in the spacing axis hole that is inlaid in valve body of this pendant collet; On valve rod in pendant collet, be coaxially installed with a baffle ring.
And valve rod upper end is stretched out valve body and by being inlaid in the flat key on valve rod top, handwheel or driver is installed.
Advantage of the present utility model and good effect are:
This valve adopts dual-seal, and first is seal with O ring, and after O shape circle damages, lip-type packing can also be played sealing, has ensured the sealing at valve rod place, has saved maintenance cost.
Brief description of the drawings
Fig. 1 is cross-sectional view of the present utility model.
Reference numeral represents: 1 flat key, 2 valve rods, 3 screws, 4 glands, 5 valve bodies, 6 pendant collets, 7O shape circle, 8O shape ring support, 9 baffle rings, 10 pads, 11 lip-type packings.
Detailed description of the invention
Below in conjunction with accompanying drawing and by specific embodiment, the utility model is described in further detail, and following examples are descriptive, are not determinate, can not limit protection domain of the present utility model with this.
A dual valve rod leak-proof structure for valve shown in accompanying drawing 1, is vertically rotatablely equipped with valve rod 2 in the made axis hole in valve body top, and valve rod upper end is stretched out valve body and by the flat key 1 that is inlaid in valve rod top, handwheel or driver is installed; On the valve body on valve rod top, be set with a gland 4.
In order to ensure the sealing of valve rod, between valve rod and the contact-making surface of valve body, coaxial sleeve is equipped with an O shape ring support 8, the inside and outside circle of this O shape ring support respectively limit mounting has an O shape circle 7, these twice O shape circle realize respectively between valve rod and and valve body between sealing, these twice O shape encloses the first resealing effect;
In order to prevent that valve rod is blown, in valve body axis hole, on the valve rod of O shape ring support top, coaxial sleeve is equipped with a pendant collet 6, in the spacing axis hole that is inlaid in valve body of this pendant collet, pendant collet effectively stops moving axially of O shape ring support, and while preventing that valve is with pressure, O shape ring support is exited by pressure; On valve rod in pendant collet, be coaxially installed with a baffle ring 9, prevent that pendant collet from moving radially;
Be coaxially installed with a pad 10 in the upper axial end of pendant collet and baffle ring, pad upper end is coaxially installed with a lip-type packing 11, plays the second resealing, and pressure medium is larger, and lip-type packing two sides are pressed tightlyer, and sealing effectiveness is good;
In lip-type packing, coaxial limit mounting has gland, and gland is sleeved on valve rod, and on gland, radial equipartition is provided with multiple screws 3 and is packed on valve body.
Although disclose for the purpose of illustration embodiment of the present utility model and accompanying drawing, but it will be appreciated by those skilled in the art that: not departing from the spirit and scope of the utility model and claims, various replacements, variation and amendment are all possible, therefore, scope of the present utility model is not limited to embodiment and the disclosed content of accompanying drawing.
Claims (2)
1. the dual valve rod leak-proof structure of a valve, in the made axis hole in valve body top, be vertically rotatablely equipped with valve rod, on the valve body on valve rod top, be set with a gland, it is characterized in that: between valve rod and the contact-making surface of valve body, coaxial sleeve is equipped with an O shape ring support, the inside and outside circle of this O shape ring support respectively limit mounting has an O shape circle; Above the axial direction of O shape ring support, be coaxially installed with a pad, pad upper end is coaxially installed with a lip-type packing, plays the second resealing; In lip-type packing, coaxial limit mounting has gland, and gland is sleeved on valve rod, and on gland, radial equipartition is provided with multiple screws and is packed on valve body;
On valve rod in valve body axis hole above O shape ring support, coaxial sleeve is equipped with a pendant collet, in the spacing axis hole that is inlaid in valve body of this pendant collet; On valve rod in pendant collet, be coaxially installed with a baffle ring.
2. the dual valve rod leak-proof structure of valve according to claim 1, is characterized in that: valve rod upper end is stretched out valve body and by being inlaid in the flat key on valve rod top, handwheel or driver is installed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201521018366.8U CN205261000U (en) | 2015-12-08 | 2015-12-08 | Dual stem seal structure of valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201521018366.8U CN205261000U (en) | 2015-12-08 | 2015-12-08 | Dual stem seal structure of valve |
Publications (1)
Publication Number | Publication Date |
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CN205261000U true CN205261000U (en) | 2016-05-25 |
Family
ID=56002528
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CN201521018366.8U Active CN205261000U (en) | 2015-12-08 | 2015-12-08 | Dual stem seal structure of valve |
Country Status (1)
Country | Link |
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CN (1) | CN205261000U (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106439043A (en) * | 2016-12-08 | 2017-02-22 | 安卡精密机械(天津)股份有限公司 | Novel filling valve |
CN110131439A (en) * | 2019-05-21 | 2019-08-16 | 天津市塘沽第一阀门有限公司 | A kind of anti-blow valve stem equipment of welding ball valve |
-
2015
- 2015-12-08 CN CN201521018366.8U patent/CN205261000U/en active Active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106439043A (en) * | 2016-12-08 | 2017-02-22 | 安卡精密机械(天津)股份有限公司 | Novel filling valve |
CN110131439A (en) * | 2019-05-21 | 2019-08-16 | 天津市塘沽第一阀门有限公司 | A kind of anti-blow valve stem equipment of welding ball valve |
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