CN1189408A - Negative pressure tight lining polytetrafluoroethylene product and its tight lining method - Google Patents
Negative pressure tight lining polytetrafluoroethylene product and its tight lining method Download PDFInfo
- Publication number
- CN1189408A CN1189408A CN97106231A CN97106231A CN1189408A CN 1189408 A CN1189408 A CN 1189408A CN 97106231 A CN97106231 A CN 97106231A CN 97106231 A CN97106231 A CN 97106231A CN 1189408 A CN1189408 A CN 1189408A
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- pore
- lining
- goods
- negative pressure
- matrix
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- Granted
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 229920001343 polytetrafluoroethylene Polymers 0.000 title claims abstract description 10
- 239000004810 polytetrafluoroethylene Substances 0.000 title claims abstract description 10
- -1 polytetrafluoroethylene Polymers 0.000 title claims abstract description 9
- 239000011148 porous material Substances 0.000 claims description 26
- 238000007789 sealing Methods 0.000 claims description 22
- 239000004809 Teflon Substances 0.000 claims description 20
- 229920006362 Teflon® Polymers 0.000 claims description 20
- 239000011159 matrix material Substances 0.000 claims description 20
- 235000008331 Pinus X rigitaeda Nutrition 0.000 claims description 10
- 235000011613 Pinus brutia Nutrition 0.000 claims description 10
- 241000018646 Pinus brutia Species 0.000 claims description 10
- 238000000465 moulding Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 abstract description 6
- 229910052751 metal Inorganic materials 0.000 abstract description 6
- 239000000463 material Substances 0.000 description 8
- 230000005587 bubbling Effects 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Abstract
The present invention relates to a negative pressure tight lining method of polytetrafluoroethylene lining product and its product, and is characterized by that an air chamber with vacuum suction force is set on the inner surface of F4 lining and metal equipment base body, and the interior vacuum degree of said chamber can be permanently kept, and on the base body of the finished product a valve device for vacuumizing the contact surface of product base body and polytetrafluoroethylene lining, and after said valve device is connected with vacuumizing device, it can be vacuumized.
Description
The present invention relates to a kind of teflon lined method and goods thereof, be specifically related to the goods and the tight lining process thereof of the tight lining teflon of a kind of negative pressure.
Polytetrafluoroethylplastic plastic (PTFE, be called for short F4) be desirable material comparatively in the modern anticorrosion field, tight lining teflon goods are promptly used the anticorrosion goods of this kind material lining, can delay the corrosion and damage of industrial equipment, the goods, materials and equipments loss is saved in the normal operation that helps producing.The main specifications that is used for relevant pipeline pipe fitting such as chemical industry, medicine, oil and national defense industry, supporting, container is between diameter 72mm to 500mm, F4 lining thickness is 1mm to 5-8mm, the temperature that allows to use is between-30 ℃ to 260 ℃, and pressure is reaching vacuum between the 0.1-0.4 below the 3kg.The primary structure of product is: in type (or like intending) F4 material bodies is covered standard (or nonstandard) hardware surface of internal cavity connect sealing to the flange turned welt.The quality of product is unquestionable with regard to the F4 material, mainly be meant the quality of lining system, the fair method that depends on the lining system of lining system, the method that present lining is made is roughly divided pine lining and tight lining method, and loose lining method is the method at the eighties at this product application initial stage, because pine serves as a contrast, make and leave big gap between F4 layer and metallic matrix, during the high temperature pressure operating mode, the F4 lining is protruded bubbling, and this is the major defect of loose lining method.National sections in 1992 become to do the F4 lining goods of the band metal grill of No. 057 file recommendation, are that patented invention (patent No. is CN2032939U) once obtained national science and technology third prize, international eureka gold medal, knight's medal.Though metal grill has been controlled the thermal stretching of F4 backing layer, also belong to the pine lining, can't stop to protrude bubbling.Tight lining method afterwards grows up on pine lining method basis, just changes " closely continuously " into from " leaving the gap " combining of F4 lining and metallic matrix.The patented invention in 93 years: tight lining teflon technology of pipe container and pipe container accessory and goods thereof, (patent No. CN9210941116), adopt the plan formed body of F4 plastics, hardware is served as external mold, put into F4 and intend after the formed body, internal mold is served as in the powder filler pressurization, band is compressed into stove sintering again then, is equivalent to mould in fact, behind the sintering, F4 and metallic object molten adhere have been finished " tight lining " finished product.The goods of tight lining method are modern beyond doubt than product of the future, but with regard to integral status, except more small-bore lining goods, or backing layer thickening, or outside the operating mode specific example, all be difficult to stop on result of use: the mass defect problem that occurs during the high temperature negative pressure, i.e. the distortion of backing layer is inhaled flat on the circular section.Inhaling flat phenomenon is main weakness and the defective that has now in the tight lining method, also is an anxious still unsolved difficult problem to be solved.From practice, observe " inhaling flat " phenomenon because of one-tenth mechanism, relate to following three aspect factor.
1.F4 the lining article construction is different from the common plastics goods, forms owing to be laminated with by two kinds of thermal coefficient of expansion different materials in the structure, its coefficient is that F4 is 20-26 in the time of 20 ℃-200 ℃, and cast steel is 11.3-13.The incoherence of F4 in addition, when temperature raise, each other thermal expansion stresses was unclamped tight lining in the combination.
2.F4 some characteristic of material is unfavorable for tight lining.Except incoherence, the F4 second order transition point is that Volume Changes is 1% in the time of 20 ℃ between 20 ℃-30 ℃, along with temperature raises, heat wriggling trend is active, and the rigidity trend descends, the lifting contrast appears in linear expansion coefficient, and the violent heating power activity of material itself also makes tight lining unfavorable.
3. working condition particularity, high temperature pressure and high temperature negative pressure and deposit (negative pressure generally occurs when emptying) in the running, negative pressure makes the F4 lining be subjected to active force.
" inhale " course flat just under these three kinds of factor alternating actions because of becoming.This course also can obtain explaining from action-reaction law.
The goods and the tight lining process thereof that the purpose of this invention is to provide the tight lining teflon of a kind of negative pressure.
Above-mentioned purpose of the present invention realizes in the following manner:
The goods of the tight lining teflon of a kind of negative pressure comprise goods matrix, teflon lined, it is characterized in that the goods matrix is provided with the valve gear that vacuumizes usefulness for the contact-making surface of the periphery of goods matrix and teflon lined sealing.
It is characterized in that described valve gear comprises shell, the valve cap of band pore, the metallic gasket of polytetrafluoroethylene sealing gasket band pore, one end of shell has pore and communicates with contact-making surface, the other end is threaded with valve cap, polytetrafluoroethylene sealing gasket is placed between metallic gasket and the valve cap, and pore on the valve cap and the pore circular section projection on the metallic gasket are all staggered.
It is characterized in that on the goods matrix, also being provided with the instrument of indication contact-making surface vacuum.
The tight lining teflon method of lining of a kind of negative pressure, comprise the teflon lined pine lining of moulding is gone in the matrix, and the flange at pressurization adhering and sealing matrix two ends, it is characterized in that adopting vavuum pump pine to be pumped to required degree to the air in the gap, make contact-making surface be negative pressure state by the valve gear that is arranged on the matrix.
Advantage of the present invention is tangible: the tight lining teflon lining of the negative pressure goods that adopt the inventive method to make, has excellent anti-negative pressure performance, be particularly useful under the high temperature negative pressure working condition, when instrument shows that vacuum descends, can be evacuated to required degree once more, make that teflon lined does not come off, bubbling not, anti-positive and negative, anti-negative pressure, the service life of having improved goods greatly.
Following drawings and Examples are further described method provided by the invention and products thereof again.
Fig. 1 tightly serves as a contrast the structural representation of the straight tube of F4 for present embodiment.
Fig. 2 is a valve gear zoomed-in view 4. among Fig. 1.
As Fig. 1, shown in 2, present embodiment is the straight tube goods of a tight lining F4, by the metal straight pipe matrix 1. the F4 lining 2. form, the straight tube matrix 1. go up correct position be provided be threaded with it and the valve gear of adhering and sealing 4., valve gear 4. by cylinder blanket 5. with pore valve cap 6. 7. with the F4 sealing gasket 8. and band pore metallic gasket 6. 9. form, a shell end undergauge 5. has pore and 6. 3. communicates with contact-making surface, 7. the other end is threaded with valve cap, the F4 sealing gasket 8. be placed in metallic gasket 9. and valve cap 7. between (6. 8. the F4 sealing gasket also can open pore of the same size with it in the relevant position with the pore that 7. valve cap is gone up).The pore that 9. 6. the pore that 7. valve cap is gone up gone up with the metallic gasket 6. projection of circular section all staggers not overlappingly, and the instrument that indication contact-making surface vacuum 3. is installed at metal straight pipe matrix correct position 1. 10..
With the F4 lining of moulding 2. the pine lining go into the metal straight pipe matrix 1. in, and at straight tube two ends flange 1., close fluorine binding agent FS-208 pressurization and be bonded and sealed with resistant to elevated temperatures at flange outer contacting face periphery, thereby contact-making surface is sealed.
With the pipette tip of vavuum pump stretch into valve cap pore 7. 6. in, and penetrate the F4 sealing gasket and vacuumize after 8., pine is served as a contrast the pore that 9. air in the gap go up by metallic gasket 6. take away and make the contact-making surface of periphery sealing 3. to required vacuum, to extract suction pipe out.At this moment, 8. 9. metallic gasket press the F4 sealing gasket under suction function, because 6. the pore 9. gone up of metallic gasket all staggers with the pore projection that 8. 7. valve cap reach on the F4 sealing gasket, thus the port sealing that 8. the F4 sealing gasket is gone up, with the face of keeping in touch vacuum 3..This negative pressure tightly serves as a contrast the anti-negative pressure function admirable of goods of F4, is particularly suited for using under the high temperature negative pressure operating mode, when the vacuum that 10. goes up when instrument descends, can be evacuated to necessary requirement once more 10., has improved goods service life.
Except the present embodiment negative pressure tightly serves as a contrast the straight tube goods of F4, also can there be the negative pressure such as pipe fitting, container, tower joint of different shape size tightly to serve as a contrast goods.
Certainly for not establishing that 4. valve installs and the hollow needle that will be connected with the vavuum pump suction pipe directly thrusts the F4 lining and 2. 3. vacuumizes to the contact-making surface of periphery sealing; after taking out pin is transferred to; pin hole on the F4 lining has been bonded and sealed; also can obtain the goods that negative pressure tightly serves as a contrast F4, this conversion is also within the protection domain of the goods of the inventive method lining system and method.
Claims (5)
1. the goods of the tight lining teflon of negative pressure, comprise goods matrix, teflon lined, it is characterized in that goods matrix (1) is provided with the valve gear (4) that vacuumizes usefulness for the contact-making surface (3) of the periphery of goods matrix (1) and teflon lined (2) sealing.
2. the goods of the tight lining teflon of negative pressure according to claim 1, it is characterized in that described valve gear (4) comprises shell (5), the valve cap (7) of band pore (6), polytetrafluoroethylene sealing gasket (8), the metallic gasket (9) of band pore (6), one end of shell (5) has pore (6) and communicates with contact-making surface (3), the other end is threaded with valve cap (7), polytetrafluoroethylene sealing gasket (8) is placed between metallic gasket (9) and the valve cap (7), and the pore (6) on the valve cap (7) all staggers with pore (6) the circular section projection on the metallic gasket (9).
3. the goods of the tight lining teflon of negative pressure according to claim 1 and 2 is characterized in that also being provided with the instrument (10) of indicating contact-making surface (3) vacuum on goods matrix (1).
4. tight lining teflon method of lining of negative pressure, comprise the teflon lined pine lining of moulding is gone in the matrix, and the flange at pressurization adhering and sealing matrix two ends, it is characterized in that adopting vavuum pump the air that pine serves as a contrast in the gap to be pumped to required degree, make contact-making surface (3) be negative pressure state by the valve gear (4) that is arranged on the matrix (1).
5. method according to claim 4, it is characterized in that described valve gear (4) comprises the metallic gasket (9) of shell (5), the valve cap (7) of being with pore (6), polytetrafluoroethylene sealing gasket (8), band pore (6), one end of shell (5) has pore (6) and communicates with contact-making surface (3), the other end is threaded with valve cap (7), polytetrafluoroethylene sealing gasket (8) is placed between metallic gasket (9) and the valve cap (7), and the pore (6) on the valve cap (7) all staggers with pore (6) the circular section projection on the metallic gasket (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97106231A CN1059382C (en) | 1996-10-07 | 1997-01-15 | Products of negative pressure tightly lining teflon and tightly lining process for the products |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96221179.6 | 1996-10-07 | ||
| CN96221179 | 1996-10-07 | ||
| CN97106231A CN1059382C (en) | 1996-10-07 | 1997-01-15 | Products of negative pressure tightly lining teflon and tightly lining process for the products |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1189408A true CN1189408A (en) | 1998-08-05 |
| CN1059382C CN1059382C (en) | 2000-12-13 |
Family
ID=25744150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97106231A Expired - Fee Related CN1059382C (en) | 1996-10-07 | 1997-01-15 | Products of negative pressure tightly lining teflon and tightly lining process for the products |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1059382C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101863356A (en) * | 2010-05-27 | 2010-10-20 | 陈烈 | Steel-liner plastic container and processing process thereof |
| CN102049755A (en) * | 2010-11-25 | 2011-05-11 | 苏州工业园区广福汽保机电设备有限公司 | Device for mounting polyvinyl sheath in sealing structure of detection device of electronic endoscopy |
| CN102642305A (en) * | 2012-03-14 | 2012-08-22 | 浙江东氟塑料科技有限公司 | Vacuum bonding method of anticorrosive fluoroplastic lining |
| CN104343975A (en) * | 2014-10-15 | 2015-02-11 | 湖北中孚化工集团有限公司 | Negative pressure tank body with lining part and use method for negative pressure tank body under negative pressure |
| CN113048330A (en) * | 2021-02-27 | 2021-06-29 | 江苏星球防腐科技有限公司 | Novel anti-corrosion pipeline process method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1015426B (en) * | 1989-04-18 | 1992-02-12 | 温州市向阳化工设备厂 | Lining shaping device for polytetrafluoroethylene standard sealing head |
| CN1038563C (en) * | 1990-12-18 | 1998-06-03 | 赵永镐 | Negative pressure-resisting corrosion-resisting lining |
| JP2501048B2 (en) * | 1991-05-14 | 1996-05-29 | 康弘 横島 | Pipeline repair method |
-
1997
- 1997-01-15 CN CN97106231A patent/CN1059382C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101863356A (en) * | 2010-05-27 | 2010-10-20 | 陈烈 | Steel-liner plastic container and processing process thereof |
| CN102049755A (en) * | 2010-11-25 | 2011-05-11 | 苏州工业园区广福汽保机电设备有限公司 | Device for mounting polyvinyl sheath in sealing structure of detection device of electronic endoscopy |
| CN102642305A (en) * | 2012-03-14 | 2012-08-22 | 浙江东氟塑料科技有限公司 | Vacuum bonding method of anticorrosive fluoroplastic lining |
| CN102642305B (en) * | 2012-03-14 | 2014-02-19 | 浙江东氟塑料科技有限公司 | Vacuum bonding method of anticorrosive fluoroplastic lining |
| CN104343975A (en) * | 2014-10-15 | 2015-02-11 | 湖北中孚化工集团有限公司 | Negative pressure tank body with lining part and use method for negative pressure tank body under negative pressure |
| CN113048330A (en) * | 2021-02-27 | 2021-06-29 | 江苏星球防腐科技有限公司 | Novel anti-corrosion pipeline process method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1059382C (en) | 2000-12-13 |
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