CN204664603U - A kind of Deep-sea high voltage valve rod Bidirectional seal structure - Google Patents
A kind of Deep-sea high voltage valve rod Bidirectional seal structure Download PDFInfo
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- CN204664603U CN204664603U CN201520282053.7U CN201520282053U CN204664603U CN 204664603 U CN204664603 U CN 204664603U CN 201520282053 U CN201520282053 U CN 201520282053U CN 204664603 U CN204664603 U CN 204664603U
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Abstract
The utility model relates to a kind of Deep-sea high voltage valve rod Bidirectional seal structure, comprises the actuator being under water arranged on valve one end, and each sealing configuration all comprises valve body, bonnet, valve rod and valve stem seal part; Bonnet is connected with valve body, under water actuator respectively, is provided with valve stem seal part between bonnet and valve rod; Bonnet side is provided with detection tapped hole.The utility model have employed the balance pressure in the actuator under water at valve rod sealing device two ends and the pressure medium in valve and acts on Multiple Combination Sealing in valve rod two opposite directions respectively, sealing force raises with pressure and increases, and realizes the sealing of valve rod bidirection press.And inject lubricating grease by the thread measurement hole be arranged on bonnet to stem internal, improve the working life of Sealing and the flexibility of valve rod action.The utility model can extensively be applied in control valve field, deep-sea.
Description
Technical field
The utility model relates to a kind of valve rod leak-proof structure, particularly about a kind of Deep-sea high voltage valve rod Bidirectional seal structure applied in control valve field, deep-sea.
Background technique
Along with petroleum exploration in China exploitation is to the strategic shift of ocean, the demand of offshore oil equipment is strengthened further, larger to external technology and equipment dependence, so no matter be from national energy security aspect or from the viewpoint of equipment manufacture future development, the drilling and extracting equipment that development is applicable to China's oil-gas exploration and exploitation is all extremely urgent.
Underwater valve door device and equipment are monopolized by offshore company for a long time, domesticly lack input in this respect and research, and in recent years, the Some Enterprises of China expands research with regard to offshore oil underwater kit specific technique and product, has made significant headway; But domestic rare enterprise or mechanism are to underwater valve door device development system, comprehensively study.Because the valve of land use is generally without the need to considering that ambient exterior atmospheric pressure affects the sealing of valve rod, and be convenient to from outside observe and find seal defect, for ease of maintenaince, therefore only need consider the impact of pressure medium on valve stem seal of valve internal, the i.e. sealing reliability of single pressure direction and maintenance, land valve both domestic and external is all without particular/special requirement, and valve rod is all the pressure seal arrangements adopting this kind of single direction.But; the valve used under abyssal environment; except considering that the pressure medium of valve internal is on except the impact of valve stem seal; also need to consider that seal arrangement one end of valve rod affects by the sealing of the pressure of actuator's internal balance under water; this balance pressure realizes actuator's internal pressure by a kind of deep sea pressure compensating chain device to be changed with the change of outside abyssal environment water depth pressure, realizes the transient equiliblium of external and internal pressure and the pressure protect to actuator under water.Valve rod sealing device now will be subject to the acting in conjunction impact of pressure medium and water depth pressure.By the research to external deep sea valve valve rod leak-proof structure, the multi-sealing structure form mostly external deep sea valve valve stem seal is to adopt dynamic radial seal and static seal combined and seal arrangement, and be also single sealing direction with the pressure medium bearing valve internal.
Summary of the invention
For the problems referred to above, the purpose of this utility model is to provide a kind of Deep-sea high voltage valve rod Bidirectional seal structure, and sealing structure can realize high undersea hydrostatic pressures valve rod two way sealed.
For achieving the above object, the utility model takes following technological scheme: a kind of Deep-sea high voltage valve rod Bidirectional seal structure, it is characterized in that: it comprises the actuator being under water arranged on valve one end, each described sealing configuration all comprises valve body, bonnet, valve rod and valve stem seal part; Described bonnet is connected respectively with described valve body, described actuator under water, is provided with described valve stem seal part between described bonnet and described valve rod; Described bonnet side is provided with detection tapped hole.
The described bonnet of actuator one end under water described in connection offers stuffing hole, Gland is fixed by fastening stud in described stuffing hole top, the described stuffing hole being positioned at described Gland bottom is provided with two-layer filler heelpiece, between two-layer described filler heelpiece, be provided with lantern sleeve; Form the first annular cavity between described lantern sleeve and described bonnet, between described lantern sleeve and described valve rod, form the second annular cavity; In the middle part of described lantern sleeve, be provided with pod apertures, described pod apertures is communicated with described first annular cavity, the second annular cavity; Described detection tapped hole is communicated with the second annular cavity with described first annular cavity, pod apertures successively.
Be positioned at described valve body and described bonnet connection side, between described valve body and described bonnet, form body cavity room; Be positioned at described bonnet and described actuator under water connection side, described bonnet and describedly form bonnet inner cavity chamber between actuator under water.
Described hermetic unit comprises the first Sealing, the second Sealing, V filler combination Sealing, the 3rd Sealing and the 4th Sealing; Described bonnet and described valve body connection side, be provided with described first Sealing between described bonnet and described valve rod; Described second Sealing is provided with bottom described first Sealing top, described stuffing hole; In described stuffing hole, between two-layer described filler heelpiece and described lantern sleeve, be all provided with described V filler combination Sealing; On described stuffing hole top, between described Gland top and described valve rod, be provided with described 3rd Sealing; Described 4th Sealing is provided with between described Gland and described bonnet.
Described detection tapped hole place is provided with blocking.
Guide bush is provided with between described bonnet and described valve rod.
The utility model is owing to taking above technological scheme, it has the following advantages: 1, the utility model acts on the Multiple Combination Sealing in valve rod two opposite directions respectively due to the balance pressure of employing in the actuator under water at valve rod sealing device two ends and the pressure medium in valve, each Sealing adopts self tightening structure, sealing force can raise with pressure and increase, and realizes the sealing of valve rod bidirection press.2, the utility model is in order to reduce valve rod and the surface friction drag of Sealing when action runs, and injects lubricating grease by the thread measurement hole be arranged on bonnet to stem internal, improves the working life of Sealing and the flexibility of valve rod action.The utility model can extensively be applied in control valve field, deep-sea.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in detail.
As shown in Figure 1, the utility model provides a kind of Deep-sea high voltage valve rod Bidirectional seal structure, it comprises the actuator being under water arranged on bonnet upper end, under water actuator with the sealing between bonnet, valve rod, be connected not within the utility model, do not elaborate herein, be only described for bonnet one end.The utility model sealing configuration all comprises valve body 1, bonnet 2, valve rod 3 and valve stem seal part.Valve body 1 is connected with the lower end of bonnet 2, and the upper end of bonnet 2 is connected (meaning not shown in the figures) with actuator under water, is provided with valve stem seal part between bonnet 2 and valve rod 3.Body cavity room V1 is formed between valve body 1 and the lower end of bonnet 2; Be connected between lower side with actuator under water in the upper end of bonnet 2 and form bonnet inner cavity chamber V2.The bonnet 2 of close actuator one end under water offers stuffing hole 4, Gland 6 is installed with by fastening stud 5 at stuffing hole 4 top, the stuffing hole 4 being positioned at Gland 6 bottom is provided with two-layer filler heelpiece 7, between two-layer filler heelpiece 7, be provided with lantern sleeve 8.Be positioned in the middle part of lantern sleeve 8, form the first annular cavity V3 between the stuffing hole 4 that lantern sleeve 8 and bonnet 2 are offered, between lantern sleeve 8 and valve rod 3, form the second annular cavity V4.In the middle part of lantern sleeve 8, be provided with pod apertures 9, pod apertures 9 is communicated with the first annular cavity V3, the second annular cavity V4; Be provided with in bonnet 2 side and detect tapped hole 10, detect tapped hole 10 and be communicated with the second annular cavity V4 with the first annular cavity V3, pod apertures 9 successively.
In above-described embodiment, as shown in Figure 1, hermetic unit comprises the first Sealing 11, second Sealing 12, V filler combination Sealing the 13, the 3rd Sealing 14 and the 4th Sealing 15.In bonnet 2 and valve body 1 connection side, between bonnet 2 and valve rod 3, be provided with the first Sealing 11; The second Sealing 12 is provided with bottom the first Sealing 11 top, stuffing hole 4.In stuffing hole 4, (the V-type filler near the second Sealing 12 side is opening down, and the V-type filler near the 4th Sealing 15 side is opening up, as shown in Figure 1) to be all provided with V filler combination Sealing 13 between two-layer filler heelpiece 7 and lantern sleeve 8.On stuffing hole 4 top, between Gland 6 top and valve rod 3, be provided with the 3rd Sealing 14; Be provided with the 4th Sealing the 15, four Sealing 15 between Gland 6 and bonnet 2 to be positioned at below the 3rd Sealing 14.
In the various embodiments described above, be positioned at detection tapped hole 10 place and be provided with blocking 16.
In the various embodiments described above, between bonnet 2 and valve rod 3, be provided with guide bush 17.
In sum, Deep-sea high voltage valve rod Bidirectional seal structure of the present utility model utilizes the balance pressure P2 in the actuator under water at bonnet 2 two ends and the pressure medium P1 in valve body to act on Multiple Combination Sealing in valve rod 3 two opposite directions respectively, each Sealing adopts self tightening structure, sealing force can raise with pressure and increase, and realizes the sealing of valve rod 3 bidirection press; Simultaneously in order to reduce valve rod and the surface friction drag of Sealing when action runs, injecting lubricating grease by detecting tapped hole 10 to valve rod 3 inside, improving the working life of each Sealing and the flexibility of valve rod 3 action.
As shown in Figure 1, the utility model also provides a kind of sealing anti-attrition test method of Deep-sea high voltage valve rod Bidirectional seal structure, due to the valve used under abyssal environment, except considering that the pressure medium of valve internal is on except the impact of valve stem seal, also needing to consider that sealing configuration one end of valve rod affects by the sealing of the pressure of actuator's internal balance under water (is with depth of water dynamic change to hanging under water in installation process at valve first, substantially remain unchanged after being installed to seabed), this balance pressure realizes actuator's internal pressure by deep sea pressure compensating chain device to be changed with the change of outside abyssal environment water depth pressure, realize the transient equiliblium of external and internal pressure and the pressure protect to actuator under water.Valve is after coming into operation, and valve rod sealing member will be subject to the acting in conjunction impact of pressure medium and water depth pressure.In high pressure valve manufacture under water, checkout procedure, in order to ensure valve rod sealing, the reliability of action and flexibility, the long period realizing valving is non-maintaining, the usability of high reliability, just need detect valve rod leak-proof structure.Test method of the present utility model specifically comprises the following steps:
1) guarantee that each parts such as valve body 1 inside, valve rod 3 and valve matched actuating mechanism connect correct, sealing place is without obvious damage, and valve flowing channel and inner each chamber interior clean, foreign;
2) by assemble sequence, valve components and Sealing are assembled, complete valve final assembly, valve and the connection of actuator under water, sealing successively, and by the shutoff of valve two ends.
3) by step 2) the middle valve complete machine assembled, by operating actuator under water, after making valve be in part opening state, injection test medium in the body cavity room V1 between valve body 1, bonnet 2, and be pressurized to for the test pressure P1 needed for testing valve rod seal step by step;
4) test pressure P1 is applied on the first Sealing 11 by the space between bonnet 2, guide bush 17, valve rod 3 by test(ing) medium, realizes testing the first order sealing of valve rod 3 one end;
5) if the seal failure of the first Sealing 11, test(ing) medium then continues to be applied on the second Sealing 12 by the pressure that the first Sealing 11 leaks along the gap between valve body 1 and valve rod 3, realizes testing the second level sealing of valve rod 3 one end;
6) if the seal failure of the second Sealing 12, test(ing) medium then continues to be applied to by the pressure that the second Sealing 12 leaks on the V filler combination Sealing 13 that is positioned at bottom stuffing hole 4 (as shown in Figure 1) along the matching gap between filler heelpiece 7 and bonnet 2, valve rod 3, realizes testing the third level sealing of valve rod 3 one end and stuffing hole 4;
7) if be positioned at the seal failure at V filler combination Sealing 13 place bottom matching gap, test(ing) medium after then leaking can accumulate the first annular cavity V3 between the lantern sleeve 8 of bonnet 2 stuffing hole 4 and bonnet 2, the second annular cavity V4 between valve rod 3 and lantern sleeve 8 and pod apertures 9 inside, flow to the outer surface of bonnet 2 eventually through the pod apertures 9 on lantern sleeve 8 and detection tapped hole 10, thus realize the detection to valve rod 3 side pressure P 1 sealability.
8) by completing steps 3) ~ 7) valve carry out once complete switch motion, again by after valve open to part opening state, observe and detect tapped hole place and whether have leakage, detect after terminating the test pressure of body cavity room to be unloaded safely and put;
9) 8 are completed) after step, to the pressure balance inner chamber injection test medium of actuator inside under water, in the bonnet inner cavity chamber V2 that test(ing) medium is formed after the pod apertures by actuator inside is under water injected into actuator and bonnet 2 connection, and be pressurized to valve step by step and preset test pressure P2 needed for the depth of water;
10) test pressure P2 is acted on the 3rd Sealing 14, the 4th Sealing 15 by Gland 6 and valve rod 3, matching gap between Gland 6 and bonnet 2 stuffing hole 4 by test(ing) medium respectively, realizes testing the first order sealing of valve rod 3 the other end and stuffing hole 4;
11) if the 3rd Sealing 14, the 4th Sealing 15 are distinguished or seal failure simultaneously, test(ing) medium then continue along the matching gap between Gland 6, guide bush 17, valve rod 3 pressure that the 3rd Sealing 14 or the 4th Sealing 15 leak acted on be positioned at stuffing hole 4 top V filler combination Sealing 13 on (as shown in Figure 1), realize testing the second level sealing of valve rod 3 the other end and stuffing hole 4;
12) if be positioned at the seal failure at V filler combination Sealing 13 place on stuffing hole 4 top, test(ing) medium after then leaking can accumulate the first annular cavity V3 between the lantern sleeve 8 of bonnet 2 stuffing hole 4 and bonnet 2, the second annular cavity V4 between valve rod 3 and lantern sleeve 8 and pod apertures 9 inside, flow to the outer surface of bonnet 2 eventually through the pod apertures 9 on lantern sleeve 8 and detection tapped hole 10, thus realize the detection to valve rod 3 opposite side pressure P 2 sealability.
13) completing steps 1) ~ 12) test and the valve be up to the standards, first in lantern sleeve 8, purge dry pressurized air by detecting tapped hole 10, after clearance test medium, greasing link of instruments is started greasing to detection tapped hole 10 end, and lubricating grease will detect tapped hole 10 shutoff with blocking 16 after filling lubricating grease by detection tapped hole 10, pod apertures 9 successively to the first annular cavity V3, the second annular cavity V4.During valve rod 3 action, the lubricating grease be stored in the second annular cavity V4 chamber can reduce the surface friction drag between valve rod 3 and the second Sealing 12, V filler combination Sealing 13, first Sealing 11, the 3rd Sealing 14, guide bush 17, increase the service life, ensure valve rod 3 flexible movements.
In sum, the utility model is applied to 1500 meters under water, during the valve stem seal of rated pressure 5000PSI (34.5MPa) gate valve, stuffing hole sealing, sealing test, greasing anti-attrition design, through experimental test, the maximum Seal test pressure that valve rod realizes can reach 52MPa, without obvious seepage; At rated working pressure 34.5MPa, under injecting grease testing, the surface friction drag of valve rod reduces about 20% ~ 30% than Theoretical Design calculated value, effectively can extend seal durability, ensures valve rod action ground flexibility.The utility model can realize safe and efficient shutoff by blocking 16 after experiment.
The various embodiments described above are only for illustration of the utility model; the structure of each parts, size, setting position and shape all can change to some extent; on the basis of technical solutions of the utility model; all improvement of carrying out individual part according to the utility model principle and equivalents, all should not get rid of outside protection domain of the present utility model.
Claims (9)
1. a Deep-sea high voltage valve rod Bidirectional seal structure, is characterized in that: it comprises the actuator being under water arranged on valve one end, and each described sealing configuration all comprises valve body, bonnet, valve rod and valve stem seal part; Described bonnet is connected respectively with described valve body, described actuator under water, is provided with described valve stem seal part between described bonnet and described valve rod; Described bonnet side is provided with detection tapped hole.
2. a kind of Deep-sea high voltage valve rod Bidirectional seal structure as claimed in claim 1, it is characterized in that: the described bonnet of actuator one end under water described in connection offers stuffing hole, Gland is fixed by fastening stud in described stuffing hole top, the described stuffing hole being positioned at described Gland bottom is provided with two-layer filler heelpiece, between two-layer described filler heelpiece, be provided with lantern sleeve; Form the first annular cavity between described lantern sleeve and described bonnet, between described lantern sleeve and described valve rod, form the second annular cavity; In the middle part of described lantern sleeve, be provided with pod apertures, described pod apertures is communicated with described first annular cavity, the second annular cavity; Described detection tapped hole is communicated with the second annular cavity with described first annular cavity, pod apertures successively.
3. a kind of Deep-sea high voltage valve rod Bidirectional seal structure as claimed in claim 1, is characterized in that: be positioned at described valve body and described bonnet connection side, form body cavity room between described valve body and described bonnet; Be positioned at described bonnet and described actuator under water connection side, described bonnet and describedly form bonnet inner cavity chamber between actuator under water.
4. a kind of Deep-sea high voltage valve rod Bidirectional seal structure as claimed in claim 2, is characterized in that: be positioned at described valve body and described bonnet connection side, form body cavity room between described valve body and described valve rod; Be positioned at described bonnet and described actuator under water connection side, described valve rod and described bonnet, form bonnet inner cavity chamber between actuator under water.
5. a kind of Deep-sea high voltage valve rod Bidirectional seal structure as described in any one of claim 2,4, is characterized in that: described hermetic unit comprises the first Sealing, the second Sealing, V filler combination Sealing, the 3rd Sealing and the 4th Sealing; Described bonnet and described valve body connection side, be provided with described first Sealing between described bonnet and described valve rod; Described second Sealing is provided with bottom described first Sealing top, described stuffing hole; In described stuffing hole, between two-layer described filler heelpiece and described lantern sleeve, be all provided with described V filler combination Sealing; On described stuffing hole top, between described Gland top and described valve rod, be provided with described 3rd Sealing; Described 4th Sealing is provided with between described Gland and described bonnet.
6. a kind of Deep-sea high voltage valve rod Bidirectional seal structure as described in any one of Claims 1 to 4, is characterized in that: described detection tapped hole place is provided with blocking.
7. a kind of Deep-sea high voltage valve rod Bidirectional seal structure as claimed in claim 5, is characterized in that: described detection tapped hole place is provided with blocking.
8. a kind of Deep-sea high voltage valve rod Bidirectional seal structure as described in Claims 1 to 4,7 any one, is characterized in that: be provided with guide bush between described bonnet and described valve rod.
9. a kind of Deep-sea high voltage valve rod Bidirectional seal structure as claimed in claim 5, is characterized in that: be provided with guide bush between described bonnet and described valve rod.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520282053.7U CN204664603U (en) | 2015-05-04 | 2015-05-04 | A kind of Deep-sea high voltage valve rod Bidirectional seal structure |
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| CN201520282053.7U CN204664603U (en) | 2015-05-04 | 2015-05-04 | A kind of Deep-sea high voltage valve rod Bidirectional seal structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832703A (en) * | 2015-05-04 | 2015-08-12 | 中国海洋石油总公司 | Two-way valve rod sealing structure of deep-sea high pressure valve and sealing anti-attrition test method |
| CN112240428A (en) * | 2020-10-14 | 2021-01-19 | 上海沪东造船阀门有限公司 | Composite packing sealing structure |
| CN115773386A (en) * | 2022-11-29 | 2023-03-10 | 江苏盐电阀门有限公司 | Sealing equipment and process for deep sea ball valve |
-
2015
- 2015-05-04 CN CN201520282053.7U patent/CN204664603U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832703A (en) * | 2015-05-04 | 2015-08-12 | 中国海洋石油总公司 | Two-way valve rod sealing structure of deep-sea high pressure valve and sealing anti-attrition test method |
| CN112240428A (en) * | 2020-10-14 | 2021-01-19 | 上海沪东造船阀门有限公司 | Composite packing sealing structure |
| CN115773386A (en) * | 2022-11-29 | 2023-03-10 | 江苏盐电阀门有限公司 | Sealing equipment and process for deep sea ball valve |
| CN115773386B (en) * | 2022-11-29 | 2023-12-26 | 江苏盐电阀门有限公司 | Sealing equipment and process for deep sea ball valve |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee after: CNOOC research institute limited liability company Patentee after: China Offshore Oil Group Co., Ltd. Co-patentee after: Wuzhong Instrument Co., Ltd. Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee before: CNOOC Research Institute Patentee before: China National Offshore Oil Corporation Co-patentee before: Wuzhong Instrument Co., Ltd. |
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| CP01 | Change in the name or title of a patent holder |