CN201858926U - Compensation seal pretightening device used for heat exchanger - Google Patents
Compensation seal pretightening device used for heat exchanger Download PDFInfo
- Publication number
- CN201858926U CN201858926U CN2010206141373U CN201020614137U CN201858926U CN 201858926 U CN201858926 U CN 201858926U CN 2010206141373 U CN2010206141373 U CN 2010206141373U CN 201020614137 U CN201020614137 U CN 201020614137U CN 201858926 U CN201858926 U CN 201858926U
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- pretightening
- compensation
- heat exchanger
- fastening bolt
- gasket
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- Expired - Fee Related
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Abstract
The utility model relates to a compensation seal pretightening device used for a heat exchanger. The compensation seal pretightening device comprises a fastening bolt which is connected with two pipeline flanges, pretightening nuts which are matched with the fastening bolt, pretightening disk springs which are arranged among the pretightening nut and the outer end faces of the pipeline flanges, and a gasket which is arranged between the two pipeline flanges. The compensation seal pretightening device is characterized in that the gasket adopts the internal compensation type composite gasket structure, namely, a stereo elastic metal net is arranged in the gasket; therefore, after the device works, the internal compensation type gasket and the pretightening disk spring with the external compensation capability can deform in a certain degree according to the change of the pretightening force along the change of the temperature so as to achieve the effect of keeping the sealing stable because of the great fluctuation of the pretightening force caused by the expansion on heating and the contraction on cooling; therefore, the leakage caused by the change of the pretightening force of the flange fastening bolt resulted from the expansion on heating and the contraction on cooling of the device, is overcome. Thus, the compensation seal pretightening device can achieve the long-period and no-leakage work of the heat exchanger; in addition, the compensation seal pretightening device has the advantages of simple structure, compact space size and the like.
Description
Technical field
The utility model particularly relates to a kind of compensation sealing pre-tightening apparatus that is used on the heat exchanger.
Background technology
At present, the sealing of common flange is all used in known heat exchanger sealing, and in fact, it is very complicated.Because the operation principle of heat exchanger and mode, determined that every bit is all worked on the heat exchanger on different temperature, and then cause that different parts produce different expanding with heat and contract with cold on the heat exchanger, along with condition of work changes, the work of each parts, all belong to dynamic variation in the strictness, can cause several cycles in one day sometimes.Therefore, revealing often appears in heat exchanger, reveals nature and can produce a lot of harm, and such as the loss of product, equipment is impaired, the system failure, even also can increase unsafe factor (as on fire) etc., therefore thoroughly solution is even more important.In addition, the fluctuation of pressure also can impact the pretightning force of fastening bolt to pad, causes pad to be revealed because of pretightning force is not enough.
Summary of the invention
The utility model for solve the technical problem that exists in the known technology provide a kind of simple in structure, bulk is compact, good seal performance be used for compensation sealing pre-tightening apparatus on the heat exchanger.
The technical scheme that the utility model is taked for the technical problem that exists in the solution known technology is:
A kind of compensation sealing pre-tightening apparatus that is used on the heat exchanger, comprise the fastening bolt that connects two pipeline flanges, the pre-load nut that cooperates with fastening bolt, be arranged on the pretension dish spring between pre-load nut and the pipeline flange outer face and be arranged on pad between two pipeline flanges, it is characterized in that: offset-type Composition spacer structure in described pad adopts, promptly be provided with the stereo-elastic wire netting in the inside of pad, pretension dish spring is sleeved on the fastening bolt.
The utility model can also adopt following technical measures:
Described wire netting adopts the wire netting of three-dimensional stretching structure.
Advantage and the good effect that the utlity model has are: because the utility model adopts said structure, promptly the Composition spacer between two pipeline flanges adopts the interior offset-type pad that has three-dimensional stretching wire netting, this compression back resilience is extremely strong, can hold cumulative, therefore after the equipment operation, along with offset-type pad in the variation of temperature and the pretension dish spring with external compensation ability all can produce certain deformation according to the size that pretightning force changes, keep the stable effect of sealing thereby reach the huge fluctuation of the pretightning force that causes because of expanding with heat and contract with cold.And then can overcome the leakage that the pretightning force of the flange fastening bolt that brought with shrinkage changes and cause of rising of heat owing to equipment; Therefore the utility model can be realized heat exchanger long period, leak free operation; The utility model also has advantages such as simple in structure, bulk compactness in addition.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is that the utility model is at equipment operation back structural representation.
Among the figure: 1, fastening bolt; 2, pre-load nut; 3, pretension dish spring; 4, Composition spacer; 4-1, stretching wire netting; 5, pipeline flange.
The specific embodiment
For further understanding summary of the invention of the present utility model, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows:
Embodiment:
See also Fig. 1, a kind of compensation sealing pre-tightening apparatus that is used on the heat exchanger, comprise the fastening bolt 1 that connects two pipeline flanges 5, the pre-load nut 2 that cooperates with fastening bolt 1, be arranged on the pretension dish spring 3 between pre-load nut 2 and the pipeline flange outer face and be arranged on pad between two pipeline flanges with external compensation function, offset-type Composition spacer structure in described pad adopts promptly is provided with wire netting 4-1 in the inside of Composition spacer 4.Adopt three-dimensional stretching structure for wire netting in the utility model better embodiment, stretchable holes is the little otch that cuts out rule on the liner plate body in the three-dimensional wire netting that stretches, the solid type grid that orientation stretching produced then, it is packed into can effectively make in the Composition spacer gasket surface stressed evenly, and can not scatter, reach good compensation performance, the compound reinforcement pad that is adopted is the graphite Composition spacer.
The utility model is after the equipment operation, see also Fig. 2, wherein provide the fastening bolt 1 of pretightning force to extend owing to the expanded by heating of equipment, the pretightning force of its flange fastening bolt 1 is changed, after the pretightning force of flange fastening bolt 1 changes, because pad of the present utility model has three-dimensional stretching wire netting 4-1, compression back resilience is extremely strong, thereby can hold cumulative; And the profile of dish spring 3 is determined by the computer simulation accurate Calculation, thereby produces the compensation to fastening bolt 1 pretightning force.So the interior offset-type pad and the dish spring 3 that are installed on the pipeline flange 5 all can produce certain deformation according to the size that pretightning force changes, thereby reach the effect of compensation sealing.
The utility model installation method: in order to solve the problem that the shrinkage of heat exchanger heat expansion causes bolt pretightening to change, at first, we to guarantee pretightning force and expand with heat and contract with cold after pretightning force can be greater than not causing bolt to produce the pulling force of plastic deformation, therefore the method for bolting on to greatest extent is wrong; Simultaneously, pretightning force can not be too small, and this is apparent.Therefore, according to our pretightning force Database Systems inquiry, the determining and will calculate according to the specification and the operating pressure of bolt material, bolt of pretightning force is to guarantee that it effectively and can not be excessive.
Claims (2)
1. compensation sealing pre-tightening apparatus that is used on the heat exchanger, comprise the fastening bolt that connects two pipeline flanges, the pre-load nut that cooperates with fastening bolt, be arranged on the pretension dish spring between pre-load nut and the pipeline flange outer face and be arranged on pad between two pipeline flanges, it is characterized in that: offset-type Composition spacer structure in described pad adopts, promptly be provided with the stereo-elastic wire netting in the inside of pad, pretension dish spring is sleeved on the fastening bolt.
2. the compensation sealing pre-tightening apparatus that is used on the heat exchanger according to claim 1, it is characterized in that: described wire netting adopts the wire netting of three-dimensional stretching structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206141373U CN201858926U (en) | 2010-11-18 | 2010-11-18 | Compensation seal pretightening device used for heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206141373U CN201858926U (en) | 2010-11-18 | 2010-11-18 | Compensation seal pretightening device used for heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201858926U true CN201858926U (en) | 2011-06-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206141373U Expired - Fee Related CN201858926U (en) | 2010-11-18 | 2010-11-18 | Compensation seal pretightening device used for heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201858926U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106224397A (en) * | 2016-10-13 | 2016-12-14 | 大连华锐重工集团股份有限公司 | A kind of quick despatch axial stretching collocation structure based on diaphragm coupling |
| CN108488516A (en) * | 2018-06-20 | 2018-09-04 | 北京首钢股份有限公司 | A kind of flange sealing structure and method |
| CN112145838A (en) * | 2020-09-01 | 2020-12-29 | 江苏嘉洛德低逸散工程技术有限公司 | Flange static seal low-loss system integrated device and seal installation process |
| CN113280025A (en) * | 2021-05-19 | 2021-08-20 | 中国科学院长春光学精密机械与物理研究所 | Line expansion compensation gasket for image sensor |
-
2010
- 2010-11-18 CN CN2010206141373U patent/CN201858926U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106224397A (en) * | 2016-10-13 | 2016-12-14 | 大连华锐重工集团股份有限公司 | A kind of quick despatch axial stretching collocation structure based on diaphragm coupling |
| CN106224397B (en) * | 2016-10-13 | 2023-07-07 | 大连华锐重工集团股份有限公司 | Quick assembly and disassembly axial expansion compensation structure based on diaphragm coupler |
| CN108488516A (en) * | 2018-06-20 | 2018-09-04 | 北京首钢股份有限公司 | A kind of flange sealing structure and method |
| CN112145838A (en) * | 2020-09-01 | 2020-12-29 | 江苏嘉洛德低逸散工程技术有限公司 | Flange static seal low-loss system integrated device and seal installation process |
| CN113280025A (en) * | 2021-05-19 | 2021-08-20 | 中国科学院长春光学精密机械与物理研究所 | Line expansion compensation gasket for image sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110608 Termination date: 20131118 |