CN203348714U - Multiple-sealing plug valve - Google Patents
Multiple-sealing plug valve Download PDFInfo
- Publication number
- CN203348714U CN203348714U CN 201320394104 CN201320394104U CN203348714U CN 203348714 U CN203348714 U CN 203348714U CN 201320394104 CN201320394104 CN 201320394104 CN 201320394104 U CN201320394104 U CN 201320394104U CN 203348714 U CN203348714 U CN 203348714U
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- CN
- China
- Prior art keywords
- cock
- valve body
- ring
- gland
- pressing plate
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- 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 - Lifetime
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Abstract
The utility model discloses a multiple sealing plug valve comprising a valve body. A valve cavity is arranged in the valve body, a cock is arranged in the valve cavity, a lining is arranged on the outer side wall of the cock, a cock rod used for rotating the cock is arranged at the upper end of the cock, and a stuffing box is arranged between the valve body and the cock rod. The multiple sealing plug valve is characterized in that a seal assembly is arranged in the stuffing box and comprises a lip-shaped seal ring, a plurality of packing layers, an emergency ring and an O-shaped seal ring, and the lip-shaped seal ring, the packing layers, the emergency ring and the O-shaped seal ring are sleeved on the cock rod, the upper end faces and the lower end faces of the packing layers are of bevel structures, an annular seal space is arranged in the emergency ring, an injection orifice communicating with the annular seal space is arranged on the valve body, and a hold-down gear is arranged on the seal assembly. The multiple-sealing plug valve has the advantages that the lining and the cock form a seal for sealing primarily when the cock valve is in a close or open working state; the arrangement of the seal assembly can realize tight seal without external leakage.
Description
Technical field
The utility model relates to valve technology field, is specifically related to a kind of multi-sealed stopcock.
Background technique
Stopcock is generally to be assembled by major parts such as valve body, valve gap, cock, lining, filler, handles, is arranged on pipeline and plays on-off action, and the realization of its switch relies on lever drive cock half-twist to complete.This stopcock in use common problem is: the cock sealing of stopcock is to be completed by the conventional fillers on artificial compression valve gap, under working condition, often because of the filler wearing and tearing, occur to outside leakage, external leakage is befouling environment but also stay potential safety hazard not only, during in particular for the operating mode of inflammable and explosive or deep-etching or poisonous working medium, can cause serious equipment and personal safety accident.
Summary of the invention
The purpose of this utility model is: for the deficiencies in the prior art, the utility model provides a kind of function multi-sealed to stopcock that have, can not produce to outside leakage phenomenon the multi-sealed stopcock while being particularly useful for the operating mode of inflammable and explosive or deep-etching or poisonous working medium.
To achieve these goals, the utility model has adopted following technological scheme: a kind of multi-sealed stopcock, comprise valve body, be provided with valve pocket in described valve body, be provided with cock in valve pocket, be provided with lining on the cock outer side wall, the cock upper end is provided with for rotating the cock stem of cock, be provided with stuffing box between described valve body and cock stem, it is characterized in that: in described stuffing box, be provided with black box, described black box comprises lip-type packing, some layers of packing layer, emergent ring, O-ring seals, described lip-type packing, some layers of packing layer, emergent ring, O-ring seals all is set on cock stem, on described packing layer, lower end surface is made as inclined-plane, be provided with Seal cage in described emergent ring, described valve body is provided with the injection orifice be communicated with Seal cage, described black box is provided with hold down gag.
The beneficial effects of the utility model are: at stopcock, when closing or open working state, lining and cock form sealing, play the primary seal effect; Black box the tight seal that can realize without external leakage is set.
The utility model further arranges: described hold down gag comprises gland, pressing plate, butterfly spring and bolt, described gland is arranged on the black box upper end and conflicts with black box, described pressing plate is arranged on gland, described bolt is connected with valve body through pressing plate, and described butterfly spring is set on bolt and between bolt head and pressing plate.
Pass through technique scheme: the setting of hold down gag is in order to compress filler and lip-type packing, can make up filler and lip-type packing surface abrasion that the long-term rotary switch work of cock stem causes, thereby keep its sealing.
The utility model further arranges: between the gland and cock stem of described O RunddichtringO in stuffing box, described lip-type packing is arranged on stuffing box bottom, described packing layer is arranged between gland and lip-type packing, and described emergent ring is arranged between packing layer.
Pass through technique scheme: arrange so reasonable in designly, simple in structure, simultaneously can reach fine sealing effect again.
The utility model further arranges: between described lip-type packing and bottom packing layer, pad is set.
Pass through technique scheme: the pad setting has the effect of location lip-type packing.
The utility model further arranges: described cock stem upper end arranges cock and adjusts structure, described cock is adjusted structure and is comprised the adjustment gland, adjusts pressing plate, adjusts screw, described cock stem is provided with boss, described adjustment gland is arranged on boss, described adjustment pressing plate is arranged on to be adjusted on gland, and described adjustment screw is connected with valve body through adjusting pressing plate.
Pass through technique scheme: arranging like this can be by tightening the adjustment screw, thereby compress cock and lining, the stopcock sealing formed, stopcock opens or cuts out, cock is with together with lining all closely cooperates all the time, played main seal action, stoped working medium to leak in valve cavity, cause the sleeve surface abrasion when the long-term rotary switch effect of cock and while leaking, can be by again tightening the adjustment screw, again compress cock and lining and form sealing, effectively avoid surperficial abrasion and cause working medium to leak.
The utility model further arranges: described emergent ring comprises emergent ring and lower emergent ring, on the described emergent ring end face relative with lower emergent ring, is respectively equipped with upper cavity and lower cavity, described upper cavity and lower cavity formation Seal cage.
Pass through technique scheme: arrange so simple in structure, reasonable in design.
The utility model further arranges: described valve body split is made as upper valve body and lower valve body, and upper valve body and lower valve body are bolted.
Pass through technique scheme: arrange so simple in structure, easy for installation, reasonable in design.
The accompanying drawing explanation
The cross-sectional view that Fig. 1 is the utility model embodiment;
The cross-sectional view that Fig. 2 is the utility model embodiment;
The local structure for amplifying schematic diagram that Fig. 3 is the utility model embodiment.
Embodiment
As Figure 1-3, embodiment of the present utility model is a kind of multi-sealed stopcock specifically, comprise valve body 1, described valve body 1 split is made as upper valve body 11 and lower valve body 12, upper valve body 11 is connected by bolt 13 with lower valve body 12, be provided with valve pocket 121 in described lower valve body 12, be provided with cock 2 in described valve pocket 121, be provided with lining 3 on described cock 2 outer side walls, cock 2 upper ends are provided with the cock stem 21 for rotating cock 2, be provided with stuffing box 4 between described upper valve body 11 and cock stem 21, be provided with black box in described stuffing box 4, described black box comprises lip-type packing 5, some layers of packing layer 6, emergent ring 7, O-ring seals 8, described lip-type packing 5, some layers of packing layer 6, emergent ring 7, O-ring seals 8 all is set on cock stem 21, on described packing layer 6, lower end surface is made as inclined-plane 61, be provided with Seal cage 71 in described emergent ring 7, described upper valve body 11 is provided with the injection orifice 111 be communicated with Seal cage 71, described black box is provided with hold down gag 9, pass through technique scheme, at stopcock when closing or open working state, lining 3 forms sealing with cock 2, play the primary seal effect, black box the tight seal that can realize without external leakage is set.
The utility model further arranges: described hold down gag 9 comprises gland 91, pressing plate 92, butterfly spring 93 and bolt 94, described gland 91 is arranged on the black box upper end and conflicts with black box, described pressing plate 92 is arranged on gland 91, described bolt 94 is connected with upper valve body 11 through pressing plate 92, described butterfly spring 93 is set on bolt 94 and between bolt head 941 and pressing plate 92, pass through technique scheme: arranging of hold down gag 9 can be to pressing down filler 6 and lip-type packing 5, lip-type packing 5 has the Static and dynamic sealability, also there is self-tightening, it relies on lip to be close to seal surface, block leakage way and obtain sealing effect, therefore form seal action with cock stem 21, when compressing filler 6, because of inclined-plane component effect, filler 6 is pushed on to cock stem 21 and stuffing box 4 inwalls simultaneously, forms good sealing, hold down gag 9 can also make up the long-term rotary switch work of cock stem 21 and cause filler 6 and the surperficial abrasion of lip-type packing 5, thereby keeps sealing between filler 6 and lip-type packing 5 and cock stem 21.
The utility model further arranges: between the gland 91 and cock stem 21 of described O RunddichtringO 8 in stuffing box 4, described lip-type packing 5 is arranged on stuffing box 4 bottom, described packing layer 6 is arranged between gland 91 and lip-type packing 5, and described emergent ring 7 is arranged between packing layer 6; Between described lip-type packing 5 and bottom packing layer 6, pad 51 is set; Described emergent ring 7 comprises emergent ring 72 and lower emergent ring 73, on described emergent ring 72 end face relative with lower emergent ring 73, is respectively equipped with upper cavity and lower cavity, and described upper cavity and lower cavity form Seal cage 71; Pass through technique scheme, in the utility model, O-ring seals 8 is arranged between gland 91 and cock stem, and form sealing with cock stem 21, emergent ring 7 is arranged between packing layer 6, stopcock can connect remote monitoring under working condition, leak out now once find that there is, can inject seal geases or be filled with inert gas to the Seal cages 71 in emergent ring 7 by injection orifice 111 and play the emergency sealing effect.
The utility model further arranges: described cock stem 21 upper ends arrange cock 2 and adjust structure 10, described cock 2 is adjusted structure 10 and is comprised adjustment gland 101, adjust pressing plate 102, adjust screw 103, described cock stem 21 is provided with boss 211, described adjustment gland 101 is arranged on boss 211, described adjustment pressing plate 102 is arranged on to be adjusted on gland 101, described adjustment screw 103 is connected with upper valve body 11 through adjusting pressing plate 102, the internal diameter of adjusting gland 101 in the present embodiment coordinates with cock stem 21 external diameters, the internal diameter of adjusting pressing plate 102 coordinates with cock stem 21 external diameters, arranging of technique scheme can be adjusted screw 103 by tightening, by adjusting pressing plate 102 and adjustment gland 101, masterpiece is used for to cock stem, thereby compress cock 2 and lining 3, the stopcock sealing formed, stopcock opens or cuts out, cock 2 is with together with lining 3 all closely cooperates all the time, played main seal action, stoped working medium to leak in valve cavity, while when the long-term rotary switch of cock 2, causing lining 3 surperficial abrasion, can adjust screw 103 by again tightening, again compress cock 2 and form sealing with lining 3, effectively avoid the sleeve surface abrasion and cause working medium to leak.
Claims (7)
1. a multi-sealed stopcock, comprise valve body, be provided with valve pocket in described valve body, be provided with cock in described valve pocket, be provided with lining on described cock outer side wall, the cock upper end is provided with for rotating the cock stem of cock, be provided with stuffing box between described valve body and cock stem, it is characterized in that: in described stuffing box, be provided with black box, described black box comprises lip-type packing, some layers of packing layer, emergent ring, O-ring seals, described lip-type packing, some layers of packing layer, emergent ring, O-ring seals all is set on cock stem, on described packing layer, lower end surface is made as inclined-plane, be provided with Seal cage in described emergent ring, described valve body is provided with the injection orifice be communicated with Seal cage, described black box is provided with hold down gag.
2. a kind of multi-sealed stopcock according to claim 1, it is characterized in that: described hold down gag comprises gland, pressing plate, butterfly spring and bolt, described gland is arranged on the black box upper end and conflicts with black box, described pressing plate is arranged on gland, described bolt is connected with valve body through pressing plate, and described butterfly spring is set on bolt and between bolt head and pressing plate.
3. a kind of multi-sealed stopcock according to claim 1 and 2, it is characterized in that: between the gland and cock stem of described O RunddichtringO in stuffing box, described lip-type packing is arranged on stuffing box bottom, described packing layer is arranged between gland and lip-type packing, and described emergent ring is arranged between packing layer.
4. a kind of multi-sealed stopcock according to claim 3, is characterized in that: between described lip-type packing and bottom packing layer, pad is set.
5. according to claim 1 or 2 or 4 described a kind of multi-sealed stopcocks, it is characterized in that: described cock stem upper end arranges cock and adjusts structure, described cock is adjusted structure and is comprised the adjustment gland, adjusts pressing plate, adjusts screw, described cock stem is provided with boss, described adjustment gland is arranged on boss, described adjustment pressing plate is arranged on to be adjusted on gland, and described adjustment screw is connected with valve body through adjusting pressing plate.
6. a kind of multi-sealed stopcock according to claim 5, it is characterized in that: described emergent ring comprises emergent ring and lower emergent ring, be respectively equipped with upper cavity and lower cavity on the described emergent ring end face relative with lower emergent ring, described upper cavity and lower cavity form Seal cage.
7. a kind of multi-sealed stopcock according to claim 6, it is characterized in that: described valve body split is made as upper valve body and lower valve body, and upper valve body and lower valve body are bolted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320394104 CN203348714U (en) | 2013-07-02 | 2013-07-02 | Multiple-sealing plug valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320394104 CN203348714U (en) | 2013-07-02 | 2013-07-02 | Multiple-sealing plug valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203348714U true CN203348714U (en) | 2013-12-18 |
Family
ID=49748614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320394104 Expired - Lifetime CN203348714U (en) | 2013-07-02 | 2013-07-02 | Multiple-sealing plug valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203348714U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103994246A (en) * | 2014-06-06 | 2014-08-20 | 施瑞德阀门(厦门)有限公司 | Low-temperature plug valve |
| CN108547950A (en) * | 2018-01-01 | 2018-09-18 | 保集团有限公司 | The bar of triangular loop seals |
| CN108644403A (en) * | 2018-07-20 | 2018-10-12 | 浙江万龙机械有限公司 | A kind of double sealing structure of plug valve |
| CN109555899A (en) * | 2019-01-22 | 2019-04-02 | 浙江镇石物流有限公司 | A kind of leakage preventing mechanism for tank truck shut-off valve |
-
2013
- 2013-07-02 CN CN 201320394104 patent/CN203348714U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103994246A (en) * | 2014-06-06 | 2014-08-20 | 施瑞德阀门(厦门)有限公司 | Low-temperature plug valve |
| CN108547950A (en) * | 2018-01-01 | 2018-09-18 | 保集团有限公司 | The bar of triangular loop seals |
| CN108644403A (en) * | 2018-07-20 | 2018-10-12 | 浙江万龙机械有限公司 | A kind of double sealing structure of plug valve |
| CN109555899A (en) * | 2019-01-22 | 2019-04-02 | 浙江镇石物流有限公司 | A kind of leakage preventing mechanism for tank truck shut-off valve |
| CN109555899B (en) * | 2019-01-22 | 2023-12-12 | 浙江镇石物流有限公司 | Leakage-proof mechanism for stop valve of oil tank truck |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131218 |
|
| CX01 | Expiry of patent term |