CN103234042A - Safe shutdown sealing device - Google Patents
Safe shutdown sealing device Download PDFInfo
- Publication number
- CN103234042A CN103234042A CN2013102127905A CN201310212790A CN103234042A CN 103234042 A CN103234042 A CN 103234042A CN 2013102127905 A CN2013102127905 A CN 2013102127905A CN 201310212790 A CN201310212790 A CN 201310212790A CN 103234042 A CN103234042 A CN 103234042A
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- Prior art keywords
- annular
- sealing device
- seal ring
- circular shell
- axial
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- 238000007789 sealing Methods 0.000 title claims abstract description 37
- 238000006073 displacement reaction Methods 0.000 claims abstract description 20
- 238000013507 mapping Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 231100000331 toxic Toxicity 0.000 abstract 1
- 230000002588 toxic effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 9
- 239000012530 fluid Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 231100001261 hazardous Toxicity 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 230000007096 poisonous effect Effects 0.000 description 2
- 230000008485 antagonism Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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- Gasket Seals (AREA)
- Sealing Devices (AREA)
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 a kind of when the end surface mechanical sealing system shutdown in order to stoping fluid to leak, safing mechanical seal device.Be applicable to the mechanical seal of various fluid rotating equipments, particularly when the mechanical seal of carrying large-scale/vertical equipments such as high temperature, high pressure or hazardous medium was lost efficacy or system when breaking down, as the last safety curtain that stops fluid to leak.
Background technique
In modern industry is used, more and more higher to performance and the reliability requirement of sealing in order to reduce the pollution to environment, especially require hazardous medium and atmosphere to intercept fully.Adopted the end surface mechanical sealing system that is realized by standstill seal ring and rotating seal ring more in carrying high temperature, high pressure or poisonous fluid device, and in a single day this mechanical seal lost efficacy, dielectric leakage will cause disastrous effect to environment in atmosphere.Main solution is to increase the security seal that stops together again in the mechanical seal outside of routine at present.Equipment is when running well, and this parking security seal is in opening state; When mechanical seal inefficacy or mechanical seal auxiliary system occurring and break down, the equipment downtime of conventional sealing system should parking security seal system closure even exist side by side, to stop medium fluid to big gas leakage.
The structural type that is used for parking sealer at present, it is multiple to include centrifugal parking sealer, pressure regulating type parking sealer and expanding type parking sealer etc., but because there being different problem and shortage respectively, being difficult to stop medium fully and outwards revealing, can't guarantee absolute safety.
Summary of the invention
At above-mentioned situation, the invention provides a kind of parking safety sealing device of new structure, can address the above problem satisfactorily.
The stop basic structure of safety sealing device of the present invention is:
A. at the axial end that is positioned at the conventional end face mechanical seal unit atmospheric side that includes standstill seal ring and rotating seal ring, be provided with the enclosed cavity housing of a ring-type in standstill seal loop mapping structure exterior edge face, be connected with seal ring at corresponding with it running shaft or axle sleeve position, and constitute an annular enclosed cavity jointly by the outer circumferential face of this circular shell, seal ring and running shaft or axle sleeve and the Sealing at each adjacent component fitting surface place;
B. be provided with at this circular shell and dispose the axially directed parts that comprise resilient members commonly used such as spring;
C. in annular enclosed cavity, be provided with and cooperate the annular component that outside axle or axle sleeve, to do axial displacement with this guide element and resilient member, and two sub-sealed cavities independently on being divided into said ring-shaped cavity axially by this annular component, the sub-sealed cavity that wherein is arranged in axial medial extremity is provided with the passage that links to each other with the pressurized gas inlet opening, is arranged between the opposite end of the end face of annular component of outer terminal sealed cavity and said seal ring for often opening the sealing surface of shape.
In the said structure, the position structure of the standstill seal ring that is connected with said circular shell generally can be standstill seal ring seat or the end cap parts in said this mechanical seal unit, wherein is preferably the latter's end cap parts.
Be convenient on-the-spot the installation and repair demolition, said circular shell in the said structure is to be connected to preferably through screw bolt-type link commonly used between the position structure of employing and said standstill seal ring.
What do not guarantee further that said annular component moves in the said structure is steadily reliable, and the axially directed parts that dispose resilient member on the said circular shell are preferably at two or more of the equidistant setting of circular shell upper edge circumference.Wherein, said these axially directed parts generally can preferably adopt the simplest forms such as guide rod commonly used.
Further, on the said structure basis, on at least one said these axially directed parts, can also be provided with corresponding displacement transducer, displacement transducer as forms such as currently reported and/or the capacitive displacement transducer that uses, grating displacement sensor, inductance fm displacement transducer, digital displacement sensors is preferably two of the equidistant settings of circumferencial direction at least.
Working procedure and the principle of the above-mentioned parking safety sealing device of the present invention are: under conventional water-tight equipment normal operation, relative sealed end between the annular component that is arranged in said outer terminal sealed cavity in the above-mentioned parking safety sealing device and seal ring, under the resilient member resilient force that is disposed on the axially directed parts, be in the normally open of separating a segment distance, conventional water-tight equipment is run well.When situations such as unit exception or the seal failure of front end conventional mechanical occurring; hard stop; and pressurized gas (nitrogen or other suitable gas) is sent into the sub-sealed cavity of this axial medial extremity the above-mentioned parking safety sealing device through passage from the pressurized gas inlet opening; antagonism resilient member elastic acting force; can make the annular component of axial displacement and push seal ring to; and the sealing surface between its opposing end surface is fitted tightly, play the security seal effect that stops dielectric gas to leak.After the above-mentioned parking sealer closure, also can utilize the system pressure of equipment to keep the parking security seal and be in closed state, lose efficacy because of the compression pressure forfeiture security seal that causes stopping preventing.Be arranged on the displacement transducer on the guide element, then can monitor in real time the opened/closed state of parking sealer.
Be appreciated that thus, the parking safety sealing device that the present invention is above-mentioned, lost efficacy or mechanical seal auxiliary system when breaking down at the conventional end face mechanical seal, can stop medium to big gas leakage rapidly, effectively, the particularly leakage of the high temperature of Shu Songing, high pressure or poisonous medium, and for preventing that pressurized gas from causing stopping security seal when losing efficacy because of pressure transient or forfeiture, can also use pressure medium and keep the parking security seal and be in closed state, make the parking sealer effect safer, reliable.The compact structure of device, stationary part wherein can be pre-installed into assembly, also is 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 only limits to following example.Do not breaking away under the above-mentioned technological thought situation of the present invention, various replacements or change according to ordinary skill knowledge and customary means are made all should comprise within the scope of the invention.
Description of drawings
Fig. 1 is stop a kind of structural representation of safety sealing device of the present invention.
Embodiment
The present invention that shown in Figure 1 is should the parking safety sealing device a kind of basic structure.At the atmospheric side axial end that is arranged in the conventional end face mechanical seal unit 21 that includes standstill seal ring and rotating seal ring, be fastenedly connected with a circular shell 5 in standstill seal loop mapping structure 10 exterior edge faces such as end cap for the standstill seal ring that is located by connecting with bolt 17 removablies such as grade, on rotary sleeve 1, be 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 O- ring seals 4,9,11,12,13 at each adjacent component fitting surface place, Sealings such as 15, constitute an annular enclosed cavity 18 jointly.
On this circular shell 5, be provided with some guide elements 6,14 that dispose the axially directed rod type of resilient member 7 along circumference is equidistant.On equidistant at least two said axially directed parts 14 along circumference, also be respectively arranged with corresponding displacement transducer 16, as select capacitive displacement transducer, grating displacement sensor, inductance fm displacement transducer, digital displacement sensor etc. currently reported and/the suitable displacement transducer that uses.
In annular enclosed cavity 18, be provided with and cooperate the annular component 8 that outside axle sleeve, to do axial displacement with this guide element 6 and resilient member 7, and by this annular component 8 and above-mentioned respective seals such as seal ring, said above-mentioned ring-shaped cavity 18 is divided into two separate vertically sub-sealed cavities.Wherein, the sub-sealed cavity that is arranged in axial medial extremity is provided with the passage 20 that links to each other with pressurized gas inlet opening 19; Be arranged between the opposite end of the end face of annular component 8 of outer terminal sealed cavity and 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 that is positioned at conventional end face mechanical seal unit (21) atmospheric side that includes standstill seal ring and rotating seal ring, be provided with the enclosed cavity housing (5) of a ring-type in standstill seal loop mapping structure (10) exterior edge face, be connected with seal ring (3) at corresponding with it running shaft or axle sleeve position, and by this circular shell (5), seal ring (3) and the outer circumferential face of running shaft or axle sleeve and the common formation of the Sealing one annular enclosed cavity (18) at each adjacent component fitting surface place;
B. be provided with the axially directed parts (6) that dispose resilient member (7) at this circular shell (5);
C. in annular enclosed cavity (18), be provided with and cooperate the annular component (8) that outside axle or axle sleeve, to do axial displacement with this guide element (6) and resilient member (7), and two sub-sealed cavities independently on being divided into said ring-shaped cavity (18) axially by this annular component (8), the sub-sealed cavity that wherein is arranged in axial medial extremity is provided with the passage (20) that links to each other with pressurized gas inlet opening (19), is arranged between the opposite end of the end face of annular component (8) of outer terminal sealed cavity and said seal ring (3) for often opening the sealing surface of shape.
2. parking safety sealing device as claimed in claim 1 is characterized in that the position structure (10) of the standstill seal ring that is connected with said circular shell (5) being the end cap parts in the said mechanical seal unit (21).
3. parking safety sealing device as claimed in claim 1 is characterized in that being connected through screw bolt-type link (17) in removable mode between the position structure (10) of said circular shell (5) and standstill seal ring.
4. parking safety sealing device as claimed in claim 1, the axially directed parts (6) that it is characterized in that disposing on the said circular shell (5) resilient member (7) are at least two of the equidistant setting of circular shell (5) upper edge circumference.
5. parking safety sealing device as claimed in claim 1 is characterized in that said axially directed parts (6) are guide rod.
6. parking safety sealing device as claimed in claim 1 is characterized in that being provided with displacement transducer (16) at least one said axially directed parts (6).
7. parking safety sealing device as claimed in claim 6 is characterized in that the displacement transducer (16) that arranges at said axially directed parts (6) is at least two of the equidistant settings of circumferencial direction.
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 true CN103234042A (en) | 2013-08-07 |
| CN103234042B CN103234042B (en) | 2015-05-13 |
Family
ID=48882094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310212790.5A Active CN103234042B (en) | 2013-06-01 | 2013-06-01 | Safe shutdown sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103234042B (en) |
Cited By (3)
| 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 |
| CN107989913A (en) * | 2017-12-13 | 2018-05-04 | 马鞍山市荣亿密封材料有限责任公司 | A kind of Easy opened sealed-bearing structure |
| CN108757947A (en) * | 2018-08-08 | 2018-11-06 | 天津市合润科技有限责任公司 | Gas sealing device for rotating equipment and stirrer |
Citations (10)
| 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 parking seal |
| 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 |
| JP2012241724A (en) * | 2011-05-16 | 2012-12-10 | Eagle Industry Co Ltd | Shutdown seal for mechanical seal |
| 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 |
-
2013
- 2013-06-01 CN CN201310212790.5A patent/CN103234042B/en active Active
Patent Citations (10)
| 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 parking seal |
| 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 |
| JP2012241724A (en) * | 2011-05-16 | 2012-12-10 | Eagle Industry Co Ltd | Shutdown seal for mechanical seal |
| 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 |
Cited By (3)
| 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 |
| CN107989913A (en) * | 2017-12-13 | 2018-05-04 | 马鞍山市荣亿密封材料有限责任公司 | A kind of Easy opened sealed-bearing structure |
| CN108757947A (en) * | 2018-08-08 | 2018-11-06 | 天津市合润科技有限责任公司 | Gas sealing device for rotating equipment and stirrer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103234042B (en) | 2015-05-13 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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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| COR | Change of bibliographic data | ||
| TR01 | Transfer of patent right |
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. |
|
| 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. |
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| CP01 | Change in the name or title of a patent holder |