CN109990144B - Lining fluorine insert tube suitable for high temperature acid-base reaction condition - Google Patents
Lining fluorine insert tube suitable for high temperature acid-base reaction condition Download PDFInfo
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- CN109990144B CN109990144B CN201910210331.0A CN201910210331A CN109990144B CN 109990144 B CN109990144 B CN 109990144B CN 201910210331 A CN201910210331 A CN 201910210331A CN 109990144 B CN109990144 B CN 109990144B
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- tube
- pipe
- lining
- side flange
- outer tube
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L41/00—Branching pipes; Joining pipes to walls
- F16L41/08—Joining pipes to walls or pipes, the joined pipe axis being perpendicular to the plane of the wall or to the axis of another pipe
- F16L41/086—Joining pipes to walls or pipes, the joined pipe axis being perpendicular to the plane of the wall or to the axis of another pipe fixed with screws
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
- F16L58/04—Coatings characterised by the materials used
- F16L58/10—Coatings characterised by the materials used by rubber or plastics
- F16L58/1054—Coatings characterised by the materials used by rubber or plastics the coating being placed outside the pipe
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
Abstract
The invention discloses a fluorine lining insertion tube suitable for a high-temperature acid-base reaction working condition, which comprises a tube body, wherein the tube body comprises an outer tube and an inner tube which is arranged in the outer tube and detachably connected with the outer tube, one end of the inner tube extends out of the outer tube, a lining is arranged on the outer tube, the outer tube is inserted into the lining, an equipment side flange and a pipeline side flange are also arranged on the outer tube, a rib plate is arranged between the equipment side flange and the pipeline side flange, the equipment side flange is provided with an equipment supporting screw hole which can fix the tube body on the wall of equipment cylinder integrally, a sealing plate is arranged at the end part of the inner tube, which extends out of. The invention has the advantages of simple structure, safety, reliability, stable operation, high efficiency, economy and wide application range.
Description
Technical Field
The invention relates to the technical field of insert tubes, in particular to a fluorine-lined insert tube suitable for high-temperature acid-base reaction conditions.
Background
In the reaction equipment of acid-base medium such as sulfuric acid drying, hydrochloric acid synthesis, chloromethane synthesis and the like, because of the strong corrosivity of hydrochloric acid, sulfuric acid, hydrofluoric acid, alkali liquor and other media, a reaction kettle and a storage tank made of glass lining kettle, carbon steel lining PE/PTFE/ETFE/PFA/PPS and other materials are designed and used according to different working conditions, in this kind of equipment, in order to achieve the requirements of process gas distribution and vortex breaking, the general gas phase feed pipe, reflux pipe, distribution pipe, etc. are designed into the insertion pipe type according to the process requirements, the insertion pipe of the lining is different from the conventional insertion pipe made of metal material such as carbon steel or stainless steel, due to the fact that a corrosion-resistant non-metal layer needs to be coated on the surface of steel, due to different cold and hot shrinkage coefficients between metal and non-metal, the inserted pipe is prone to cracking of a lining during use, and leakage is caused.
If chinese patent publication No. 206861070U discloses a corrosion-resistant inlet pipe, including the metal pipe body, the metal pipe body outside is provided with the installation foot, is provided with mounting bolt in the installation foot, is provided with the copper oxide inlayer on the metal pipe body inner wall, the inside two support frames that are provided with of metal pipe body, is provided with vertical corrosion-resistant interlayer between the support frame, and corrosion-resistant interlayer passes through the locating pin nail with the support frame contact site and fixes, and corrosion-resistant interlayer includes carbon fiber base layer, and both ends are provided with the polytetrafluoroethylene layer about the carbon fiber base layer, are provided with the guide plate. The defects are that the structure is complex, the material and the metal pipe wall are not completely isolated by the corrosion-resistant interlayer, only the inner layer of the copper oxide is used for corrosion prevention, the corrosion-resistant effect is poor, and the extrusion device is only suitable for an OPP film extruder.
Disclosure of Invention
The invention aims to provide a fluorine-lined insert pipe which is wide in application range, simple in structure, safe, reliable, stable in operation, efficient and economical and is suitable for high-temperature acid-base reaction working conditions, aiming at the defects of the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a lining fluorine insert tube suitable for high temperature acid-base reaction operating mode, includes the body, the body includes the outer tube and sets up in the outer tube and can dismantle the inner tube of being connected with the outer tube, outer tube is stretched out to inner tube one end, be provided with the bush on the outer tube, the outer tube inserts in the bush, still be provided with equipment side flange and pipeline side flange on the outer tube, be provided with the gusset between equipment side flange and the pipeline side flange, equipment side flange be provided with can with body monolithic fixation is at the equipment support screw on equipment section of thick bamboo wall, the tip that outer tube one end was stretched out to the inner tube is provided with the shrouding, the shrouding adopts the bolt fastening, and the.
As a preferred embodiment of the present invention, the liner is composed of an outer liner tube, an inner liner tube, and a liner plate, an annular cavity is provided between the outer liner tube and the inner liner tube, the outer tube is inserted into the cavity, and the equipment-side flange is supported on the liner plate.
In a preferred embodiment of the present invention, the material of the outer liner tube and the inner liner tube is preferably one of PTFE, newtfe, and PFA (a copolymer of perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene).
In a preferred embodiment of the present invention, the thickness of the rib plate is preferably 20 to 24 mm.
In a preferred embodiment of the present invention, the sealing plate preferably has a thickness of 40 to 50 mm.
In a preferred embodiment of the present invention, the material of the inner tube is preferably PTFE or newtfe.
In a preferred embodiment of the present invention, the material of the outer tube is preferably 20# steel.
In a preferred embodiment of the present invention, the bolt material is preferably PTFE.
In a preferred embodiment of the present invention, the outer liner pipe and the inner liner pipe are welded to each other, and a protective plate is provided outside the weld.
The invention adopts the combination of the equipment side flange and the pipeline side flange and the double-insertion pipe structure, thereby not only ensuring the vibration and alternating load resistance of the long pipeline, but also ensuring the good anti-permeability performance. The equipment side flange connected with the equipment is provided with an equipment supporting screw hole, so that the inserting pipe is integrally fixed on the wall of the equipment cylinder, the vibration of the inserting pipe is reduced, and the equipment (such as a glass lining kettle) is prevented from cracking due to alternating load. And a rib plate is arranged between the equipment side flange and the pipeline side flange, so that the strength of the pipeline side flange is ensured.
The fluorine lining insertion tube suitable for the high-temperature acid-base reaction working condition has the structure that the inner tube and the outer tube are of double insertion tubes, so that the problem that lining layers made of PTFE and the like are pulled to crack in the conventional insertion tube due to the start and stop of a reaction kettle and the temperature rise and fall process is avoided. Because the difference of the cold and hot shrinkage coefficients between materials such as PTFE and metal is large, the conventional inner and outer lining process cannot avoid the tension fracture caused by the shrinkage of the lining, after the inner pipe and outer pipe double-insertion pipe structure is changed, a space for free expansion is reserved, the service performance of the insertion pipe is ensured, the outer diameter size of the inner pipe and the inner diameter of the outer pipe form transition fit, and the sealing and free expansion between the inner and outer sleeves are ensured.
The outer pipe adopts the technology of inner and outer linings of a steel part, and the steel part is preferably selected to require that the sand blasting precision reaches Sa2.5-3 grade. The outer pipe is provided with a lining which is composed of an outer liner pipe, an inner liner pipe and a lining board, an annular cavity is arranged between the outer liner pipe and the inner liner pipe, and the outer pipe is inserted into the cavity. The outer liner pipe and the inner liner pipe are welded with each other, and a protection plate is arranged outside the welding line, so that the welding line is ensured not to be contacted with materials, and the corrosion resistance of the lining is further ensured.
After the inner pipe is provided with the distribution holes according to the process requirements, the end part of the inner pipe is blocked and welded by a sealing plate and is fixed by a bolt, and the bolt is prevented from withdrawing by a pin.
The fluorine-lined insert pipe suitable for the high-temperature acid-base reaction working condition fully considers the cold and hot shrinkage between metal and nonmetal, adopts the structure of an inner pipe and an outer pipe double insert pipe in design, considers various boundary conditions with potential safety hazards, reserves the space for the contraction of the pipe, avoids the damage caused by vibration by fixing the side flange of the equipment by using the wall of the equipment cylinder, does not cause material leakage even if the inner pipe is damaged by the unique double insert pipe structure, and has wide application prospect.
Compared with the prior art, the invention has the following advantages:
1. simple structure is reliable, adopts the two insert tube structures of inner tube and outer tube, has avoided conventional insert tube because the reation kettle opens the parking and goes up and down the temperature in-process because of the material backing layer such as PTFE and the material backing layer pull crack such as PTFE that the cold and hot shrinkage coefficient between the metal greatly arouses mutually of material backing layer such as PTFE, and inner tube external diameter size forms transition fit with the outer tube internal diameter, has ensured sealed and freely flexible between the inside and outside sleeve pipe, even the inner tube damages also can not lead to the material to leak to the atmosphere in.
2. The corrosion resistance is excellent, and PTFE or NEWPTFE is adopted as the pipe material in the insertion pipe; the outer pipe is provided with a lining which consists of an outer lining pipe, an inner lining pipe and a lining board, the inner lining pipe and the outer lining pipe are tightly lined and matched by adopting PTFE or NEWPTFE materials through an isostatic pressing pipe process or are tightly lined and matched by adopting a PFA roll coating process, and the outer pipe has excellent corrosion resistance; and a protection plate is arranged outside the welding line between the outer liner pipe and the inner liner pipe, so that the welding line is ensured not to be contacted with materials, and the corrosion resistance of the lining is further ensured.
3. The invention is efficient and economic, thoroughly solves the problem of different cold and hot shrinkage coefficients of the metal material and the fluorine series resin lining layer, and has long service cycle and obvious economic effect.
4. The method has wide application, solves the manufacturing problems of the insert pipes of the glass lining kettle, the reaction kettle with carbon steel lining PE/PTFE/ETFE/PFA/PPS and the like and the storage tank which are made of materials such as hydrochloric acid, sulfuric acid, hydrofluoric acid, alkali liquor and the like under the strong corrosion working condition, can be widely applied to the fields of reaction feeding, tower top reflux, tower bottom feeding and the like under high and low temperature acid-base media, has good reference promotion significance on similar working conditions in the industries such as fluorine chemical industry, chlor-alkali chemical industry, pharmacy, fine chemical industry and the like, provides an effective method for the optimization of equipment structures of similar enterprises, and greatly promotes the technical progress of industrial equipment.
Drawings
FIG. 1 is a schematic diagram of a fluorine-lined insert tube suitable for high temperature acid-base reaction conditions in accordance with the present invention.
Wherein: the device comprises a sealing plate 1, an outer pipe 2, an equipment side flange 3, a rib plate 4, a pipeline side flange 5, a lining 6, an inner lining pipe 6-1, an outer lining pipe 6-2, a lining plate 6-3, an inner pipe 7, a bolt 8 and a device supporting screw hole 9.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific embodiments, but the present invention is not limited to the embodiments.
As shown in the figure, the fluorine lining insert tube suitable for the high-temperature acid-base reaction working condition comprises a tube body, wherein the tube body comprises an outer tube 2 and an inner tube 7 which is arranged in the outer tube 2 and detachably connected with the outer tube 2, one end of the inner tube 7 extends out of the outer tube 2, a lining 6 is arranged on the outer tube 2, the lining 6 is composed of an outer lining tube 6-1, an inner lining tube 6-2 and a lining plate 6-3, an annular cavity is arranged between the outer lining tube 6-1 and the inner lining tube 6-2, and the outer tube 2 is inserted into the cavity. The device side flange 3 and the pipeline side flange 5 are arranged on the outer pipe 2, the device side flange 3 is supported on the lining plates 6-3, the rib plates 4 are arranged between the device side flange 3 and the pipeline side flange 5, the device side flange 3 is provided with a device supporting screw hole 9 capable of integrally fixing the pipe body on the wall of the device cylinder, the end portion, extending out of one end of the outer pipe 2, of the inner pipe 7 is provided with a sealing plate 1, the sealing plate 1 is fixed through a bolt 8, and the bolt 8 is prevented from withdrawing through a pin.
Example 1
The fluorine lining insertion tube suitable for the high-temperature acid-base reaction working condition comprises a tube body, wherein the tube body comprises an outer tube 2 (made of 20# steel) and an inner tube 7 (made of NEWPTFE) which is arranged in the outer tube 2 and detachably connected with the outer tube 2, one end of the inner tube 7 extends out of the outer tube 2, a lining 6 is arranged on the outer tube 2, the lining 6 consists of an outer lining tube 6-1, an inner lining tube 6-2 and a lining plate 6-3, an annular cavity is arranged between the outer lining tube 6-1 and the inner lining tube 6-2, and the outer tube 2 is inserted into the cavity; the outer liner tube 6-1 and the inner liner tube 6-2 are made of PTFE, and are tightly lined and matched by adopting an isostatic pressing tube tight lining process, the outer liner tube 6-1 and the inner liner tube 6-2 are mutually welded, and a protective plate (not shown in the figure and made of PFA) is arranged outside a welding seam; an equipment side flange 3 and a pipeline side flange 5 are further arranged on the outer pipe 2, the equipment side flange 3 is supported on a lining plate 6-3, and a rib plate 4 (the thickness is 20mm) is arranged between the equipment side flange 3 and the pipeline side flange 5; the equipment side flange 3 is also provided with an equipment supporting screw hole 9 which can fix the pipe body on the wall of the equipment cylinder integrally; the tip that inner tube 7 stretches out 2 one ends of outer tube is provided with shrouding 1 (the material is NEWPTFE, and thickness is 40mm), and shrouding 1 adopts bolt 8 (the model is M16 ~24, and the material is PTFE) fixed, and bolt 8 adopts the pin to prevent to withdraw from.
Example 2
The fluorine lining insertion tube suitable for the high-temperature acid-base reaction working condition comprises a tube body, wherein the tube body comprises an outer tube 2 (made of 20# steel) and an inner tube 7 (made of PTFE) which is arranged in the outer tube 2 and detachably connected with the outer tube 2, one end of the inner tube 7 extends out of the outer tube 2, a lining 6 is arranged on the outer tube 2, the lining 6 consists of an outer lining tube 6-1, an inner lining tube 6-2 and a lining plate 6-3, an annular cavity is arranged between the outer lining tube 6-1 and the inner lining tube 6-2, and the outer tube 2 is inserted into the cavity; the outer liner tube 6-1 and the inner liner tube 6-2 are made of PFA, the PFA roll coating process is adopted to tightly fit the liners, the outer liner tube 6-1 and the inner liner tube 6-2 are welded with each other, and a protection plate (not shown in the figure and made of PFA) is arranged outside a welding seam; an equipment side flange 3 and a pipeline side flange 5 are further arranged on the outer pipe 2, the equipment side flange 3 is supported on a lining plate 6-3, and a rib plate 4 (the thickness is 22mm) is arranged between the equipment side flange 3 and the pipeline side flange 5; the equipment side flange 3 is also provided with an equipment supporting screw hole 9 which can fix the pipe body on the wall of the equipment cylinder integrally; the tip that inner tube 7 stretches out 2 one ends of outer tube is provided with shrouding 1 (the material is NEWPTFE, and thickness is 43mm), and shrouding 1 adopts bolt 8 (the model is M16 ~24, and the material is PTFE) fixed, and bolt 8 adopts the pin to prevent to withdraw from.
Example 3
The fluorine lining insertion tube suitable for the high-temperature acid-base reaction working condition comprises a tube body, wherein the tube body comprises an outer tube 2 (made of 20# steel) and an inner tube 7 (made of NEWPTFE) which is arranged in the outer tube 2 and detachably connected with the outer tube 2, one end of the inner tube 7 extends out of the outer tube 2, a lining 6 is arranged on the outer tube 2, the lining 6 consists of an outer lining tube 6-1, an inner lining tube 6-2 and a lining plate 6-3, an annular cavity is arranged between the outer lining tube 6-1 and the inner lining tube 6-2, and the outer tube 2 is inserted into the cavity; the outer liner tube 6-1 and the inner liner tube 6-2 are made of PTFE, and are tightly lined and matched by adopting an isostatic pressing tube tight lining process, the outer liner tube 6-1 and the inner liner tube 6-2 are mutually welded, and a protective plate (not shown in the figure and made of PFA) is arranged outside a welding seam; an equipment side flange 3 and a pipeline side flange 5 are further arranged on the outer pipe 2, the equipment side flange 3 is supported on a lining plate 6-3, and a rib plate 4 (the thickness is 23mm) is arranged between the equipment side flange 3 and the pipeline side flange 5; the equipment side flange 3 is also provided with an equipment supporting screw hole 9 which can fix the pipe body on the wall of the equipment cylinder integrally; the tip that inner tube 7 stretches out 2 one ends of outer tube is provided with shrouding 1 (the material is NEWPTFE, and thickness is 48mm), and shrouding 1 adopts bolt 8 (the model is M16 ~24, and the material is PTFE) fixed, and bolt 8 adopts the pin to prevent to withdraw from.
Example 4
The fluorine lining insertion tube suitable for the high-temperature acid-base reaction working condition comprises a tube body, wherein the tube body comprises an outer tube 2 (made of 20# steel) and an inner tube 7 (made of PTFE) which is arranged in the outer tube 2 and detachably connected with the outer tube 2, one end of the inner tube 7 extends out of the outer tube 2, a lining 6 is arranged on the outer tube 2, the lining 6 consists of an outer lining tube 6-1, an inner lining tube 6-2 and a lining plate 6-3, an annular cavity is arranged between the outer lining tube 6-1 and the inner lining tube 6-2, and the outer tube 2 is inserted into the cavity; the outer liner tube 6-1 and the inner liner tube 6-2 are made of NEWPTFE, and are tightly lined and matched by adopting an isostatic pressing tube tight lining process, the outer liner tube 6-1 and the inner liner tube 6-2 are mutually welded, and a protective plate (not shown in the figure and made of PFA) is arranged outside a welding line; an equipment side flange 3 and a pipeline side flange 5 are further arranged on the outer pipe 2, the equipment side flange 3 is supported on a lining plate 6-3, and a rib plate 4 (the thickness is 24mm) is arranged between the equipment side flange 3 and the pipeline side flange 5; the equipment side flange 3 is also provided with an equipment supporting screw hole 9 which can fix the pipe body on the wall of the equipment cylinder integrally; the tip that inner tube 7 stretches out 2 one ends of outer tube is provided with shrouding 1 (the material is NEWPTFE, and thickness is 50mm), and shrouding 1 adopts bolt 8 (the model is M16 ~24, and the material is PTFE) fixed, and bolt 8 adopts the pin to prevent to withdraw from.
Claims (9)
1. The utility model provides a lining fluorine insert tube suitable for high temperature acid-base reaction operating mode, includes the body, its characterized in that, the body includes the outer tube and sets up in the outer tube and can dismantle the inner tube of being connected with the outer tube, inner tube one end stretches out the outer tube, be provided with the bush on the outer tube, the outer tube inserts in the bush, still be provided with equipment side flange and pipeline side flange on the outer tube, be provided with the gusset between equipment side flange and the pipeline side flange, equipment side flange be provided with can with body monolithic stationary is supporting the screw on equipment section of thick bamboo wall, the tip that the outer tube one end was stretched out to the inner tube is provided with the shrouding, the shrouding adopts the bolt fastening, and the bolt.
2. The fluorine-lined insert pipe suitable for the high-temperature acid-base reaction condition as claimed in claim 1, wherein the lining is composed of an outer lining pipe, an inner lining pipe and a lining plate, an annular cavity is arranged between the outer lining pipe and the inner lining pipe, the outer pipe is inserted into the cavity, and the equipment-side flange is supported on the lining plate.
3. The fluorine-lined insert pipe suitable for high-temperature acid-base reaction conditions as claimed in claim 2, wherein the outer liner pipe and the inner liner pipe are made of one of PTFE, NEWPTFE and PFA.
4. The fluorine-lined insert pipe suitable for the high-temperature acid-base reaction condition according to claim 1, wherein the thickness of the rib plate is 20-24 mm.
5. The fluorine-lined insert pipe suitable for the high-temperature acid-base reaction condition as claimed in claim 1, wherein the sealing plate has a thickness of 40-50 mm.
6. The fluorine-lined insert pipe suitable for high-temperature acid-base reaction conditions as claimed in claim 1, wherein the inner pipe is made of PTFE or NEWPTFE.
7. The fluorine-lined insert pipe suitable for the high-temperature acid-base reaction condition as claimed in claim 1, wherein the outer pipe is made of 20# steel.
8. The fluorine-lined insert pipe suitable for the high-temperature acid-base reaction condition as claimed in claim 1, wherein the bolt is made of PTFE.
9. The fluorine-lined insert pipe suitable for the high-temperature acid-base reaction condition as claimed in claim 2, wherein the outer liner pipe and the inner liner pipe are welded to each other, and a protection plate is arranged outside the welding seam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910210331.0A CN109990144B (en) | 2019-03-20 | 2019-03-20 | Lining fluorine insert tube suitable for high temperature acid-base reaction condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910210331.0A CN109990144B (en) | 2019-03-20 | 2019-03-20 | Lining fluorine insert tube suitable for high temperature acid-base reaction condition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109990144A CN109990144A (en) | 2019-07-09 |
| CN109990144B true CN109990144B (en) | 2021-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910210331.0A Active CN109990144B (en) | 2019-03-20 | 2019-03-20 | Lining fluorine insert tube suitable for high temperature acid-base reaction condition |
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| CN (1) | CN109990144B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2445802Y (en) * | 2000-06-19 | 2001-09-05 | 高明乾 | Material dispensing tube |
| JP2008298178A (en) * | 2007-05-31 | 2008-12-11 | Asahi Organic Chem Ind Co Ltd | Piping member made of resin |
| CN201552004U (en) * | 2009-12-14 | 2010-08-18 | 云南永昌铅锌股份有限公司 | Oxygen inlet tube of horizontal pressurizing leaching reactor |
| CN201973375U (en) * | 2011-01-11 | 2011-09-14 | 无锡市彪王化工设备厂 | Glass-lined material feeding pipe |
| CN207621387U (en) * | 2017-12-25 | 2018-07-17 | 重庆新华林自控仪表有限公司 | Novel fluoroplastics corrugated tube sealing structure |
| CN108859093A (en) * | 2018-06-09 | 2018-11-23 | 安徽高旭新材料科技有限公司 | The moulding process of outer lining in a kind of chlorination tube tetrafluoro |
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2019
- 2019-03-20 CN CN201910210331.0A patent/CN109990144B/en active Active
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