CN103234042B - Safe shutdown sealing device - Google Patents
Safe shutdown sealing device Download PDFInfo
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- CN103234042B CN103234042B CN201310212790.5A CN201310212790A CN103234042B CN 103234042 B CN103234042 B CN 103234042B CN 201310212790 A CN201310212790 A CN 201310212790A CN 103234042 B CN103234042 B CN 103234042B
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- sealing device
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Abstract
The invention relates to a safe shutdown sealing device. An annular sealed cavity housing is arranged at the axial end at an atmospheric side of a stationary sealing ring positioning structure in a end surface mechanical seal unit; a corresponding rotating shaft/shaft sleeve is connected with a sealing ring; sealing elements on the periphery surfaces of the annular housing body, the sealing ring and the rotating shaft/shaft sleeve and sealing elements on matching surfaces of adjacent components form an annular sealed cavity body; axial guiding components equipped with elastic members are arranged on the annular housing; the annular sealed cavity body is internally provided with an annular member which can have an axial displacement outside the shaft or the shaft sleeve and is matched with the guiding components and the elastic members; the annular cavity body is divided into two axially independent sealed sub-cavity bodies by the annular member; the sealed sub-cavity body at the axial inner side end is internally provided with a channel connected with a compressed gas input port; and a normally open sealing surface is arranged between the end surface of the annular member in the sealed sub-cavity body at the outer side end and the opposite end of the sealing ring. The safe shutdown sealing device can prevent a high-temperature, high-pressure or toxic medium from leaking to the atmosphere safely, rapidly and effectively when a mechanical seal fails and/or an auxiliary system is shut down due to a fault.
Description
Technical field
The present invention relates to one when end surface mechanical sealing system shutdown in order to stop fluid to leak, safing mechanical seal device.Be applicable to the mechanical seal of various fluid rotary equipment, particularly when carrying the mechanical seal of the large-scale/vertical equipments such as high temperature, high pressure or hazardous medium to lose efficacy or system malfunctions time, as the last safety curtain stoping fluid to leak.
Background technique
Modern industry application in, in order to reduce the pollution to environment, to sealing performance and reliability requirement more and more higher, especially require that hazardous medium and air intercept completely.In conveying high temperature, high pressure or toxic fluid equipment, have employed the end surface mechanical sealing system realized by stationary seal ring and rotating seal ring more, and this mechanical seal was once lose efficacy, and will cause disastrous effect in dielectric leakage to air to environment.Solution main at present increases the security seal that stops together again outside the mechanical seal of routine.Equipment is when running well, and this parking security seal is in opening state; When occurring that mechanical seal inefficacy or Mechanical Seal Auxiliary System break down, the equipment downtime of conventional sealing system, even if this parking security seal system of existing side by side closes, to stop medium fluid to atmospheric air leakage.
At present for the structural type of parking sealer, include centrifugal parking sealer, pressure regulating type parking sealer and expanding type parking sealer etc. multiple, but because there is different problem and shortage respectively, being difficult to stop medium completely to outward leakage, absolute safety cannot be ensured.
Summary of the invention
For above-mentioned situation, the invention provides a kind of parking safety sealing device of new structure, can solve the problem satisfactorily.
The stop basic structure of safety sealing device of the present invention is:
A. at the axial end being positioned at the conventional end face mechanical seal unit atmospheric side including stationary seal ring and rotating seal ring, the enclosed cavity housing of a ring-type is provided with in stationary seal ring position structure exterior edge face, be connected with seal ring at running shaft corresponding with it or axle sleeve position, and jointly form an annular enclosed cavity by this circular shell, seal ring and running shaft or the outer circumferential face of axle sleeve and the Sealing at each adjacent component fitting surface place;
B. on this circular shell, the axially directed parts being configured with and comprising the conventional resilient members such as spring are provided with;
C. in annular enclosed cavity, be provided with the annular component coordinating with this guide element and resilient member and can do axial displacement outside axle or axle sleeve, and by this annular component, said ring-shaped cavity is divided into axially independently two sub-sealed cavities, the sub-sealed cavity being wherein arranged in axial medial extremity is provided with the passage be connected with pressurized gas inlet opening, is arranged between the end face of the annular component of outer terminal sealed cavity and the opposite end of said seal ring for often opening the sealing surface of shape.
In said structure, the position structure of the stationary seal ring be connected with said circular shell can be generally the standstill seal ring seat in this mechanical seal unit said or Cover members, is wherein preferably the Cover members of the latter.
For convenience of in-site installation and repair demolition, said circular shell in said structure, be preferred to adopt with being connected through conventional screw bolt-type link between the position structure of said stationary seal ring.
Do not ensure the steadily reliable of said annular component movement in said structure further, the axially directed parts said circular shell being configured with resilient member to be preferably on circular shell two or more of circumferentially equidistant setting.Wherein, these axially directed parts said generally preferably can adopt the forms such as the most conventional guide rod.
Further, on said structure basis, at least one these axially directed parts said can also be provided with corresponding displacement transducer, as the displacement transducer of the form such as capacitive displacement transducer, grating displacement sensor, inductance fm displacement transducer, digit displacement transducer that is currently reported and/or that use, be preferably the equidistant setting of circumferencial direction at least two.
Working procedure and the principle of the present invention's above-mentioned parking safety sealing device are: under conventional water-tight equipment normal operation, the sealed end that the annular component of said outer terminal sealed cavity is relative with between seal ring is arranged in above-mentioned parking safety sealing device, be configured under the resilient member resilient force on axially directed parts, be in the normally open of separation one segment distance, conventional water-tight equipment is run well.When there is the situation such as unit exception or front end conventional mechanical seal failure; hard stop; and pressurized gas (nitrogen or other suitable gas) is sent into the sub-sealed cavity of this axial medial extremity above-mentioned parking safety sealing device through passage from pressurized gas inlet opening; antagonism resilient member elastic acting force; the annular component can doing axial displacement pushes seal ring to; and the sealing surface between its opposing end surface is fitted tightly, play the security seal effect stoping dielectric gas to leak.After above-mentioned parking sealer is closed, the system pressure of equipment also can be utilized to maintain parking security seal and to be in closed state, cause parking security seal to lose efficacy to prevent because compression pressure loses.Be arranged on the displacement transducer on guide element, then can carry out Real-Time Monitoring to the opened/closed state of parking sealer.
Be appreciated that thus, the parking safety sealing device that the present invention is above-mentioned, when conventional end face mechanical seal lost efficacy or Mechanical Seal Auxiliary System breaks down, can rapidly, effectively stop medium to atmospheric air leakage, the leakage of the high temperature particularly carried, high pressure or poisonous medium, and during for preventing pressurized gas from causing parking security seal to lose efficacy because of pressure transient or forfeiture, pressure medium can also be used and be in closed state to maintain parking security seal, make parking sealer effect safer, reliable.The compact structure of device, stationary part wherein can pre-install into assembly, is also more convenient for installing, dismantling.
Below in conjunction with the embodiment of accompanying drawing illustrated embodiment, foregoing of the present invention is described in further detail again.But this should be interpreted as that the scope of the above-mentioned theme of the present invention is only limitted to following example.Without departing from the idea case in the present invention described above, the various replacement made according to ordinary skill knowledge and customary means or change, all should comprise within the scope of the invention.
Accompanying drawing explanation
Fig. 1 is that the present invention is stopped a kind of structural representation of safety sealing device.
Embodiment
Shown in Fig. 1 is a kind of basic structure of this parking safety sealing device of the present invention.Be arranged in the atmospheric side axial end of the conventional end face mechanical seal unit 21 including stationary seal ring and rotating seal ring, a circular shell 5 is fastenedly connected with removably such as bolt 17 grade in stationary seal ring position structure 10 exterior edge faces such as the end caps for the stationary seal ring that is located by connecting, rotary sleeve 1 is fastenedly connected with a seal ring 3 through screw 2, and by this circular shell 5, seal ring 3 and axle sleeve outer circumferential face, and the Sealing such as the O-ring seals 4,9,11,12,13,15 at each adjacent component fitting surface place, jointly form an annular enclosed cavity 18.
On this circular shell 5, be circumferentially equidistantly provided with some guide elements 6,14 being configured with the axially directed rod type of resilient member 7.On circumferentially equidistant at least two said axially directed parts 14, also be respectively arranged with corresponding displacement transducer 16, as selected the currently reported and/suitable displacement transducer that uses such as capacitive displacement transducer, grating displacement sensor, inductance fm displacement transducer, digit displacement transducer.
In annular enclosed cavity 18, be provided with the annular component 8 coordinating with this guide element 6 and resilient member 7 and can do axial displacement outside axle sleeve, and by this respective seals such as annular component 8 and above-mentioned seal ring, said above-mentioned ring-shaped cavity 18 is divided into two separate vertically sub-sealed cavities.Wherein, the sub-sealed cavity being arranged in axial medial extremity is provided with the passage 20 be connected with pressurized gas inlet opening 19; Be arranged between the end face of the annular component 8 of outer terminal sealed cavity and the opposite end of said seal ring 3 for often opening the sealing surface of shape.
Claims (7)
1. parking safety sealing device, is characterized in that:
A. at the axial end being positioned at conventional end face mechanical seal unit (21) atmospheric side including stationary seal ring and rotating seal ring, the enclosed cavity housing (5) of a ring-type is provided with in stationary seal ring position structure (10) exterior edge face, be connected with seal ring (3) at running shaft corresponding with it or axle sleeve position, and jointly form an annular enclosed cavity (18) by the Sealing at the outer circumferential face of this circular shell (5), seal ring (3) and running shaft or axle sleeve, stationary seal ring position structure (10) and each adjacent component fitting surface place;
B. on this circular shell (5), be provided with the axially directed parts (6) being configured with resilient member (7);
C. in annular enclosed cavity (18), be provided with the annular component (8) coordinating with this guide element (6) and resilient member (7) axial displacement can be done outside axle or axle sleeve, and by this annular component (8), said ring-shaped cavity (18) is divided into axially independently two sub-sealed cavities, the sub-sealed cavity being wherein arranged in axial medial extremity is provided with the passage (20) be connected with pressurized gas inlet opening (19), is arranged between the end face of the annular component (8) of outer terminal sealed cavity and the opposite end of said seal ring (3) for often opening the sealing surface of shape.
2. stop safety sealing device as claimed in claim 1, it is characterized in that the position structure (10) of the stationary seal ring be connected with said circular shell (5), is the Cover members in said mechanical seal unit (21).
3. stop safety sealing device as claimed in claim 1, it is characterized in that being connected through screw bolt-type link (17) in removable mode between said circular shell (5) with the position structure (10) of stationary seal ring.
4. stop safety sealing device as claimed in claim 1, and the axially directed parts (6) that it is characterized in that said circular shell (5) is configured with resilient member (7) are at least two of circumferentially equidistant setting on circular shell (5).
5. stop safety sealing device as claimed in claim 1, it is characterized in that said axially directed parts (6) are guide rod.
6. stop safety sealing device as claimed in claim 1, it is characterized in that being provided with displacement transducer (16) at least one said axially directed parts (6).
7. stop safety sealing device as claimed in claim 6, it is characterized in that at the upper displacement transducer (16) arranged of said axially directed parts (6) be the equidistant setting of circumferencial direction at least two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310212790.5A CN103234042B (en) | 2013-06-01 | 2013-06-01 | Safe shutdown sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310212790.5A CN103234042B (en) | 2013-06-01 | 2013-06-01 | Safe shutdown sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103234042A CN103234042A (en) | 2013-08-07 |
| CN103234042B true CN103234042B (en) | 2015-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310212790.5A Active CN103234042B (en) | 2013-06-01 | 2013-06-01 | Safe shutdown sealing device |
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| Country | Link |
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| CN (1) | CN103234042B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106439015A (en) * | 2016-11-04 | 2017-02-22 | 西安航空动力控制科技有限公司 | Guide sleeve sealing structure for end face high-pressure large-drift-diameter oil way |
| CN107989913B (en) * | 2017-12-13 | 2020-04-03 | 马鞍山市荣亿密封材料有限责任公司 | Easy-to-detach oil seal bearing structure |
Citations (9)
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|---|---|---|---|---|
| US3994503A (en) * | 1975-07-11 | 1976-11-30 | Creusot-Loire | Sealing assembly |
| CN86104524A (en) * | 1986-06-27 | 1988-01-06 | 上海市化工装备研究所 | Centrifugal sealing facilities for stalling |
| CN2030270U (en) * | 1988-05-20 | 1989-01-04 | 戴小平 | Power-stop sealing |
| CN2050913U (en) * | 1989-04-24 | 1990-01-10 | 上海市化工装备研究所 | Seal unit for stopping motion of centrifugal machine |
| RU2161281C2 (en) * | 1998-10-19 | 2000-12-27 | Общество с ограниченной ответственностью Инновационно-производственное предприятие "Протон" | Standstill seal |
| CN2412131Y (en) * | 2000-01-27 | 2000-12-27 | 上海市化工装备研究所 | Parking sealing appts. |
| US6371488B1 (en) * | 1999-12-17 | 2002-04-16 | George E. Szymborski | Sealing system for high pressure closed systems having a rotating member and a housing therein |
| CN201818538U (en) * | 2010-10-13 | 2011-05-04 | 磨锐泵（上海）有限公司 | Hydraulic slide-valve type stop sealing mechanism for dynamic sealing of auxiliary impeller in centrifugal pump |
| CN203395176U (en) * | 2013-06-01 | 2014-01-15 | 四川日机密封件股份有限公司 | Parking safety sealing device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5586525B2 (en) * | 2011-05-16 | 2014-09-10 | イーグル工業株式会社 | Shutdown seal for mechanical seal |
-
2013
- 2013-06-01 CN CN201310212790.5A patent/CN103234042B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3994503A (en) * | 1975-07-11 | 1976-11-30 | Creusot-Loire | Sealing assembly |
| CN86104524A (en) * | 1986-06-27 | 1988-01-06 | 上海市化工装备研究所 | Centrifugal sealing facilities for stalling |
| CN2030270U (en) * | 1988-05-20 | 1989-01-04 | 戴小平 | Power-stop sealing |
| CN2050913U (en) * | 1989-04-24 | 1990-01-10 | 上海市化工装备研究所 | Seal unit for stopping motion of centrifugal machine |
| RU2161281C2 (en) * | 1998-10-19 | 2000-12-27 | Общество с ограниченной ответственностью Инновационно-производственное предприятие "Протон" | Standstill seal |
| US6371488B1 (en) * | 1999-12-17 | 2002-04-16 | George E. Szymborski | Sealing system for high pressure closed systems having a rotating member and a housing therein |
| CN2412131Y (en) * | 2000-01-27 | 2000-12-27 | 上海市化工装备研究所 | Parking sealing appts. |
| CN201818538U (en) * | 2010-10-13 | 2011-05-04 | 磨锐泵（上海）有限公司 | Hydraulic slide-valve type stop sealing mechanism for dynamic sealing of auxiliary impeller in centrifugal pump |
| CN203395176U (en) * | 2013-06-01 | 2014-01-15 | 四川日机密封件股份有限公司 | Parking safety sealing device |
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| Publication number | Publication date |
|---|---|
| CN103234042A (en) | 2013-08-07 |
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| C14 | Grant of patent or utility model | ||
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| C41 | Transfer of patent application or patent right or utility model | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhou Guofeng Inventor after: Liu Wei Inventor after: Chen Kan Inventor after: Wang Xu Inventor after: Wang Chao Inventor after: Zhang Junkai Inventor after: Cao Tingfa Inventor after: Li Long Inventor after: Xue Xiaopan Inventor after: Zhang Zhi Inventor after: Huang Mei Inventor before: Wang Chao Inventor before: Wang Xu Inventor before: Xue Xiaopan Inventor before: Zhang Junkai Inventor before: Li Long Inventor before: Zhang Zhi Inventor before: Huang Mei |
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Effective date of registration: 20150916 Address after: Guangdong province 518031 step Road West of the city of Shenzhen Shenzhen science and technology building 15 layer 1502, 1504, 1506 Patentee after: Zhongkehua Nuclear Power Technology Institute Co., Ltd. Patentee after: Sichuan Sunny Seal Co., Ltd. Address before: Vuko Xisi road Chengdu City, Sichuan province 610045 No. 8 Patentee before: Sichuan Sunny Seal Co., Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Guangdong province 518031 step Road West of the city of Shenzhen Shenzhen science and technology building 15 layer 1502, 1504, 1506 Co-patentee after: Zhongmi Holding Co., Ltd Patentee after: China Nuclear Power Technology Research Institute Co.,Ltd. Address before: Guangdong province 518031 step Road West of the city of Shenzhen Shenzhen science and technology building 15 layer 1502, 1504, 1506 Co-patentee before: Sichuan Sunny Seal Co., Ltd. Patentee before: China Nuclear Power Technology Research Institute Co.,Ltd. |