CN101319740B - Bellows used for polytetrafluoroethylene compensator and manufacturing method thereof - Google Patents
Bellows used for polytetrafluoroethylene compensator and manufacturing method thereof Download PDFInfo
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- CN101319740B CN101319740B CN2008100626700A CN200810062670A CN101319740B CN 101319740 B CN101319740 B CN 101319740B CN 2008100626700 A CN2008100626700 A CN 2008100626700A CN 200810062670 A CN200810062670 A CN 200810062670A CN 101319740 B CN101319740 B CN 101319740B
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- bellows
- wire netting
- teflon
- compensator
- surge layer
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Abstract
The invention relates to a bellows manufacturing technique, particularly relates to a bellows applied to a polytetrafluor ethylene compensator and a manufacturing method thereof. An inner polytetrafluor ethylene corrugated layer, a metal corrugated layer and an outer polytetrafluor ethylene corrugated layer are successively melted into an integrated body; the two diagonals of the unit grid in the metal corrugated layer are identical with the axial direction and radial direction of the bellows respectively; during the manufacturing process, the two diagonals of the quadrangular unit grid in the metal grid are laid around the polytetrafluor ethylene film in the directions identical with the axial direction and radial direction of the cylindrical mould. The technique is aimed at providing a bellows with strong capability to bear positive and negative pressures for a polytetrafluor ethylene compensator and as well as the manufacturing method. Compared with the prior art, the bellows has certain rigidity, the service life is long, small-bore bellows capable of bearing positive and negative pressures can be manufactured more easily, and the capability of the polytetrafluor ethylene compensator is improved, and so on.
Description
Technical field
The present invention relates to the bellows manufacturing technology, particularly a kind of bellows and manufacture method thereof that is used for tefloncompensator.
Background technique
Compensator is that industries such as oil, chemical industry, smelting and relieving haperacidity are used to compensate the indispensable pipe fitting of displacement that pipeline causes because of expanding with heat and contract with cold, and wherein bellows is the core component of compensator.
At present, at oil, chemical industry, in the industry of seriously corrodeds such as smelting and relieving haperacidity, generally the inner liner polytetrafluoroethylene compensator of Shi Yonging has a metal bellows compensator (patent No.: 96240233.8), polytetrafluoroethyl-ne-ne metal pipe reinforced compensator (patent No.: 92104090.3) or the like, in these disclosed patented technologies, their bellows all adopts polytetrafluoroethylmaterial material, in order to improve bellows intensity, be provided with reinforced layer in the polytetrafluoroethylbellows bellows outside, they bear bigger negative pressure in order further to improve bellows simultaneously, and the opening stiffening ring of wrapped in teflon anticorrosive coat is set at the inboard recess of bellows.Its deficiency: 1, the in use stressed squeezing action of opening end of the opening stiffening ring of wrapped in teflon anticorrosive coat, the anticorrosive PTFE layer is worn easily, metal body in the opening stiffening ring is exposed, cause aggressive medium constantly to the corrosion and damage of opening stiffening ring, thereby make all opening stiffening rings lose supporting effect gradually, make bellows lose the ability of anti-negative pressure, until whole compensator is scrapped.2, for small-bore bellows (DM＜50mm), the opening stiffening ring of wrapped in teflon anticorrosive coat can't be set at the inboard recess of bellows.3, it only plays anti-suction function at the inboard recess of bellows, and other positions of bellows periphery do not possess anti-negative pressure ability.
Summary of the invention
The objective of the invention is to design strong bellows that is used for tefloncompensator and the manufacture method thereof of a kind of anti-positive and negative pressure ability.
In order to achieve the above object, the present invention adopts following technical solution:
One, a kind of bellows that is used for tefloncompensator, it is sintered at an integral body successively by interior teflon surge layer, wire netting surge layer, outer teflon surge layer; Unit grid in the described wire netting surge layer is a quadrilateral structure, quadrilateral two diagonals respectively with bellows axially and radially consistent.
Two, the bellows manufacture method of said structure:
1. polytetrafluoroethylene film is wrapped on the cylindrical mould;
2. the flat metal net being pressed quadrilateral units grid two diagonal of flat metal net spreads on polytetrafluoroethylene film with the axial and radially corresponding to direction of cylindrical mould respectively;
3. on wire netting, twine polytetrafluoroethylene film again;
4. twine glass fiber tape at the polytetrafluoroethylene film outermost surface again;
5. the semi-finished product after will twining advance the smelting furnace sinter molding, come out of the stove through cooling, and the dismounting glass fiber tape, the demoulding forms the compound cylinder of teflon-wire netting;
6. with the compound cylinder of teflon-wire netting two ends flange;
7. the compound cylinder of the teflon-wire netting behind the flange is processed by traditional bellows moulding process, can be produced bellows.
Owing to form the initial stage in the wire netting surge layer, promptly wire netting is laid the stage, wire netting by quadrilateral units grid two diagonal in the wire netting respectively with bellows axially and radially corresponding to direction spread around.During shaping, barrel is being carried out in the radial drawing process, power concentrates on unit grid two diagonals, the unit grid distortion easily, wire netting is stretched easily, and is difficult for being broken, and the contained wire netting surge layer of the bellows interior of shaping is complete, integrity is strong.After bellows forms and since in the middle of the pipe layer of bellows clinkering wire netting surge layer and in aggregates, make bellows possess certain rigid, therefore realized the strong purpose of its anti-positive and negative pressure ability.
Description of drawings
Below in conjunction with drawings and Examples the present invention is described in further detail.
Fig. 1 is bellows structure figure.
Fig. 2 is an A place partial enlarged drawing among Fig. 1.
Fig. 3 is flat metal net reset condition structure partial figure before being shaped.
Fig. 4 launches the back part sectioned view for the back wire netting surge layer that is shaped.
Embodiment
As depicted in figs. 1 and 2, bellows is sintered at an integral body successively by interior teflon surge layer 1, wire netting surge layer 2, outer teflon surge layer 3, unit grid 4 in the described wire netting surge layer 2 is quadrilateral structure (as shown in Figure 4), quadrilateral two diagonals respectively with bellows axially and radially consistent.
Its manufacture method is as follows:
1. polytetrafluoroethylene film is wrapped on the cylindrical mould;
2. quadrilateral units grid two diagonal of the flat metal net being pressed in the flat metal net are spread on polytetrafluoroethylene film with the axial and radially corresponding to direction of cylindrical mould respectively;
3. on wire netting, twine polytetrafluoroethylene film again;
4. twine glass fiber tape at the polytetrafluoroethylene film outermost surface again;
5. the semi-finished product after will twining advance the smelting furnace thermal sintering, come out of the stove through cooling, and the dismounting glass fiber tape, the demoulding forms the compound cylinder of teflon-wire netting;
6. with the compound cylinder of teflon-wire netting two ends flange;
7. the compound cylinder of the teflon-wire netting behind the flange is processed by traditional bellows moulding process, can be produced bellows.
Bellows is cylindric at the shaping initial stage, promptly 1.-6. the product of process segment formation.Axially and radially pressurization, cylinder interior are processed jointly in general employing because traditional bellows is shaped, promptly adopt the ripple type mould to be fixed on outside the compound cylinder of teflon-wire netting, in the compound cylinder of teflon-wire netting, adopt heating pressurization or hydraulic method that the compound cylinder of teflon-wire netting is processed into bellows then.If axially and when radially consistent of the quadrilateral units grid both sides of wire netting and cylindrical mould, when barrel is carried out radial drawing, because the stressed stretching in quadrilateral units grid both sides, wire netting is broken easily, and the bellows of formation does not just possess certain rigidity.For this reason, form the initial stage in the wire netting surge layer, be wire netting shop around the stage, wire netting by the quadrilateral units grid 5 in the wire netting (no matter mesh shape is square or rhombus) (as shown in Figure 3) two diagonal respectively with cylindrical mould axially and radially corresponding to direction spread around.During shaping, when barrel is carried out radial drawing, power concentrates on unit grid two diagonals, the unit grid distortion easily, wire netting is stretched easily, quadrilateral units grid (as shown in Figure 4) two diagonal in the wire netting surge layer 4 of formation also respectively with bellows axially and radially consistent.
In sum, the present invention compared with prior art has the following advantages:
1, the bellows that forms possesses certain rigidity, so its anti-malleation ability is further enhanced.
2, can keep for a long time preferably anti-negative pressure ability, long service life.
3, be convenient to produce the small-bore bellows of anti-the positive/negative-pressure.
4, improved the anti-positive/negative-pressure ability of tefloncompensator.
4, manufacturing process is simple.
Claims (1)
1. bellows manufacture method that is used for tefloncompensator, described bellows is sintered at an integral body successively by interior teflon surge layer (1), wire netting surge layer (2), outer teflon surge layer (3), unit grid (4) in the described wire netting surge layer (2) is a quadrilateral structure, quadrilateral two diagonals respectively with bellows axially and radially consistent, it is characterized in that:
1. polytetrafluoroethylene film is wrapped on the cylindrical mould;
2. quadrilateral units grid (5) two diagonal of the flat metal net being pressed in the flat metal net are spread on polytetrafluoroethylene film with the axial and radially corresponding to direction of cylindrical mould respectively;
3. on wire netting, twine polytetrafluoroethylene film again;
4. twine glass fiber tape at the polytetrafluoroethylene film outermost surface again;
5. the semi-finished product after will twining advance the smelting furnace thermal sintering, come out of the stove through cooling, and the dismounting glass fiber tape, the demoulding forms the compound cylinder of teflon-wire netting;
6. with the compound cylinder of teflon-wire netting two ends flange;
7. the compound cylinder of teflon-wire netting after adopting traditional bellows moulding process with flange is processed into bellows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100626700A CN101319740B (en) | 2008-06-29 | 2008-06-29 | Bellows used for polytetrafluoroethylene compensator and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100626700A CN101319740B (en) | 2008-06-29 | 2008-06-29 | Bellows used for polytetrafluoroethylene compensator and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101319740A CN101319740A (en) | 2008-12-10 |
| CN101319740B true CN101319740B (en) | 2010-04-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100626700A Expired - Fee Related CN101319740B (en) | 2008-06-29 | 2008-06-29 | Bellows used for polytetrafluoroethylene compensator and manufacturing method thereof |
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| Country | Link |
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| CN (1) | CN101319740B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102661456A (en) * | 2012-05-08 | 2012-09-12 | 临海市澳法管业有限公司 | Method for preparing polytetrafluoroethylene corrugated hose for returning oil by pressurizer |
| CN103883825A (en) * | 2014-03-14 | 2014-06-25 | 江苏曙光压力容器有限公司 | Sawtooth bellow expansion joint |
| CN108061203A (en) * | 2018-01-26 | 2018-05-22 | 江苏亚星波纹管有限公司 | Advanced bellows |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2128690Y (en) * | 1992-07-02 | 1993-03-24 | 温州市锦山防腐设备厂 | Fluoroplastics-rubber compound expansion joint |
| CN2227248Y (en) * | 1994-12-21 | 1996-05-15 | 成锦明 | High-intensity metal carcase plastic compound tube |
| CN2313137Y (en) * | 1997-12-23 | 1999-04-07 | 黑龙江省塑料工业科学研究所 | Metal-reinforced plastic composite tube |
| US6935378B2 (en) * | 2003-06-23 | 2005-08-30 | Tokai Rubber Industries, Ltd. | Vibration absorbing hose |
-
2008
- 2008-06-29 CN CN2008100626700A patent/CN101319740B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2128690Y (en) * | 1992-07-02 | 1993-03-24 | 温州市锦山防腐设备厂 | Fluoroplastics-rubber compound expansion joint |
| CN2227248Y (en) * | 1994-12-21 | 1996-05-15 | 成锦明 | High-intensity metal carcase plastic compound tube |
| CN2313137Y (en) * | 1997-12-23 | 1999-04-07 | 黑龙江省塑料工业科学研究所 | Metal-reinforced plastic composite tube |
| US6935378B2 (en) * | 2003-06-23 | 2005-08-30 | Tokai Rubber Industries, Ltd. | Vibration absorbing hose |
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| Publication number | Publication date |
|---|---|
| CN101319740A (en) | 2008-12-10 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: FLUORINE PLASTIC EQUIPMENT FACTORY, WENZHOU CITY Free format text: FORMER OWNER: CHENG XIUPING Effective date: 20100722 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 325000 WENZHOU FLUOROPLASTICS EQUIPMENT MANUFACTURING FACTORY,NO.60, NIUSHAN NORTH ROAD, WENZHOU CITY, ZHEJIANG PROVINCE TO: 325000 60, NIUSHAN NORTH ROAD, WENZHOU CITY, ZHEJIANG PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20100722 Address after: 325000 Niu Shan Road, Wenzhou, Zhejiang 60, China Patentee after: Wenzhou Fluoroplastics Equipment Factory Address before: 325000 Wenzhou fluorine plastic equipment manufactory, No. 60 ox hill road, Wenzhou, Zhejiang Patentee before: Cheng Xiuping |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100414 Termination date: 20170629 |