CN106938547B - Composite device and composite method of PTFE composite pipe - Google Patents

Composite device and composite method of PTFE composite pipe Download PDF

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Publication number
CN106938547B
CN106938547B CN201710299172.7A CN201710299172A CN106938547B CN 106938547 B CN106938547 B CN 106938547B CN 201710299172 A CN201710299172 A CN 201710299172A CN 106938547 B CN106938547 B CN 106938547B
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ptfe
pipe
composite
traction
ptfe pipe
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CN106938547A (en
Inventor
黄磊
顾榴俊
丁辉
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Jiangsu Jinyou New Material Co ltd
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Jiangsu Jinyou New Material Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/66—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by liberation of internal stresses, e.g. shrinking of one of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7858—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus characterised by the feeding movement of the parts to be joined
    • B29C65/7861—In-line machines, i.e. feeding, joining and discharging are in one production line
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
    • B29C66/022—Mechanical pre-treatments, e.g. reshaping
    • B29C66/0222—Mechanical pre-treatments, e.g. reshaping without removal of material, e.g. cleaning by air blowing or using brushes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
    • B29C66/024—Thermal pre-treatments
    • B29C66/0242—Heating, or preheating, e.g. drying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/61—Joining from or joining on the inside
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/74—Joining plastics material to non-plastics material
    • B29C66/742—Joining plastics material to non-plastics material to metals or their alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
    • B29K2027/12—Use of polyvinylhalogenides or derivatives thereof as moulding material containing fluorine
    • B29K2027/18—PTFE, i.e. polytetrafluorethene, e.g. ePTFE, i.e. expanded polytetrafluorethene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

The invention discloses a composite device and a composite method of a PTFE composite pipe, wherein a metal pipe and the PTFE pipe are compounded, the compounded pipe has better corrosion resistance and better strength, and the bonding problem of the metal pipe arranged in the PTFE pipe is solved by a heating pull-in mode, bubbles are prevented from being generated between the metal pipe and the PTFE pipe, the heat conduction effect is reduced, and the manufacturing of long pipes with the length of more than 2 meters can be met.

Description

Compounding device and compounding method of PTFE (polytetrafluoroethylene) composite pipe
Technical Field
The invention relates to a preparation technology of a PTFE composite pipe, in particular to a composite device and a composite method of the PTFE composite pipe.
Background
China has many dangerous waste types, and according to the classification statistics of national dangerous waste list, the dangerous waste in China has thousands of types including 5 major types and 47 minor types. In recent years, the hazardous waste produced by industry alone is over 1000 million tons per year. In addition, the rapidly growing life dangerous waste articles such as old batteries, fluorescent tubes and the like and various electronic dangerous wastes are absolutely astronomical numbers with an incredible number. The hazardous waste of such a size has a great threat to the environment, particularly to groundwater and soil, and once the groundwater and soil are polluted, the ecological environment can hardly be reversed.
At present, many domestic hazardous waste disposal systems basically adopt traditional cement kilns, metallurgical chemical kilns and lime kilns to carry out hazardous waste treatment. The process is completely to dispose hazardous wastes according to the traditional incineration process flow, and because most of the various hazardous wastes to be treated are chemical wastes, the materials contain a large amount of toxic and harmful substances, such as polychlorinated biphenyl, explosive and radioactive wastes containing organic phosphorus compound wastes, organic cyanide compounds, beryllium-containing wastes, chromium-containing wastes, copper-containing wastes, arsenic-containing wastes, selenium-containing wastes, cadmium-containing wastes, antimony-containing wastes, mercury-containing wastes, lead-containing wastes, polychlorinated benzofuran-containing wastes, polychlorinated dioxin-containing wastes, organic halide-containing wastes, phenol-containing wastes, ether-containing wastes and other high-risk wastes, and the substances are easy to generate crystallization, adhesion and other characteristics at a certain temperature, and smoke generated when the industrial hazardous wastes are incinerated has strong corrosivity, and the phenomena also occur in occasions such as coal-fired power station boilers and the like.
Therefore, in the above situations, the use of the conventional metal heat exchanger is affected and limited by the above severe environment, and the normal operation requirements cannot be effectively met. In recent years, with the development of technology, fluoroplastic tube heat exchangers have attracted much attention in recent years due to their characteristics of superior corrosion resistance, large heat transfer coefficient, long service life, light weight of heat exchangers under the same load, and the like.
At present, the emerging fluoroplastic tube heat exchanger is widely applied to various industries, and due to the characteristics of high dust content, strong low-temperature corrosivity and the like of a heat exchange medium on the smoke side, the corrosion of corrosive substances such as smoke and the like can be reduced through a fluoroplastic heat exchange tube (such as a PTFE tube). However, the fluoroplastic heat exchange tube has the characteristics of material: the heat exchange tube has the advantages of light weight, thin wall, lower strength, and higher requirements on the strength, high pressure resistance and the like of the heat exchange tube in some occasions with severe working conditions and environments, for example, the pressure of smoke gas in some blast furnaces is higher than 20 kilograms, so that the heat exchange tube cannot be well applied, and the service life is generally lower.
How to study and design a novel tubular product that not only has better corrosion resistance but also has better intensity, high pressure resistance and good heat conductivity is the problem that needs to be solved urgently in the industry of PTFE heat exchangers at present.
Disclosure of Invention
The invention aims to overcome the defects and provides a composite device and a composite method of a PTFE composite pipe, so that the composite pipe which has better corrosion resistance, strength, high pressure resistance and heat conductivity can be prepared.
In order to achieve the above object, the present invention adopts the following technical solutions.
On the one hand, a set composite of compound pipe of PTFE, including PTFE pipe end clamping device, PTFE pipe heating device, tubular metal resonator draw gear, the both ends of PTFE pipe are located respectively to a pair of PTFE pipe end clamping device, every PTFE pipe end clamping device all includes a pair of cyclic annular anchor clamps, it is fixed to press from both sides outside turn-ups's PTFE pipe end portion, PTFE pipe heating device locates between two PTFE pipe end clamping device, wear to locate the inside PTFE pipe of PTFE pipe heating device and heat to the level, tubular metal resonator draw gear is including being used for being connected with the connector of an external diameter and PTFE pipe internal diameter assorted tubular metal resonator end, connect in the connector other end and pass the pulling member of PTFE pipe, connect in the traction drive device of the pulling member other end, it is intraductal with the PTFE pipe of metal resonator draw-in heating through traction drive device, and manage interference fit with PTFE.
The pair of annular clamps clamp the end parts of the PTFE pipe through a hydraulic device.
In the pair of annular clamps, the annular clamp positioned outside the flanging of the end part of the PTFE pipe is provided with external threads, the annular clamp positioned inside the flanging of the end part of the PTFE pipe is provided with a compression nut with internal threads, and the compression nut is in threaded connection with the annular clamp positioned outside the flanging of the end part of the PTFE pipe.
The connector include an external screw thread connector and direction head, be equipped with the internal thread in the one end of tubular metal resonator, the connector passes through the external screw thread to be connected with the internal thread cooperation of tubular metal resonator, direction head one end becomes calabash column structure and links to each other with the connector, the other end becomes the round platform form and draws the piece to link to each other.
The traction piece is a traction rod.
The traction driving device is a hydraulic cylinder.
In another aspect, a method for compounding a PTFE composite pipe comprises the steps of:
A. adopting a seamless PTFE pipe, flanging one end of the PTFE pipe outwards into a horn shape, and clamping and fixing the end through a PTFE pipe end clamping device;
B. connecting a connector of a metal tube traction device to the metal tube, and enabling a traction piece to penetrate through the PTFE tube and be connected with a traction driving device arranged at the other end of the PTFE tube;
C. heating and expanding the PTFE pipe by a PTFE pipe heating device;
D. the metal pipe is pulled into the PTFE pipe by the driving of the traction driving device and is compounded with the PTFE pipe.
The outer diameter of the metal pipe is in interference fit with the inner diameter of the PTFE pipe after being heated and expanded.
The heating temperature is 150-280 ℃.
The traction speed of the traction driving device is 0.2-0.8 m/min.
In the technical scheme of the invention, the composite device and the composite method of the PTFE composite pipe adopt the metal pipe and the PTFE pipe to be composited, the composited pipe has better corrosion resistance and better strength, and the bonding problem of the metal pipe arranged in the PTFE pipe is solved by a heating drawing mode, bubbles are prevented from being generated between the metal pipe and the PTFE pipe, the heat conduction effect is reduced, and the long pipe with the length of more than 2 meters can be manufactured.
Drawings
FIG. 1 is a schematic view showing a state in which a composite device of a PTFE composite tube of the present invention is partially used.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings.
The composite device of the PTFE composite pipe is shown in figure 1, and mainly comprises PTFE pipe end clamping devices 10, a PTFE pipe heating device 20 and a metal pipe traction device 30, wherein the pair of PTFE pipe end clamping devices 10 are respectively arranged at two ends of a PTFE pipe 1 (only the left end is shown in figure 1, the right end of the PTFE pipe end clamping device 10 is omitted), each PTFE pipe end clamping device 10 comprises a pair of annular clamps for clamping and fixing the end part of the PTFE pipe 1 which is flanged outwards, the PTFE pipe heating device 20 is arranged between the two PTFE pipe end clamping devices 10 for heating the PTFE pipe 1 which horizontally penetrates through the PTFE pipe heating device 20, the metal pipe traction device 30 comprises a connector for connecting the end part of the metal pipe 2 with the outer diameter matched with the inner diameter of the PTFE pipe 1, a traction piece which is connected at the other end of the connector and penetrates through the PTFE pipe 1, and a traction driving device which is connected at the other end of the traction piece, and the metal pipe 2 is drawn into the heated PTFE pipe 1 by the traction driving device and is in interference fit with the PTFE pipe 1.
As an example, the pair of annular clamps clamp the ends of the PTFE tube 1 by hydraulic means.
In one embodiment, the annular clamp 11a located outside the end flange of the PTFE tube 1 is provided with an external thread, and the annular clamp 11b located inside the end flange of the PTFE tube 1 is provided with a compression nut 12 having an internal thread, and is screwed to the annular clamp located outside the end flange of the PTFE tube 1 by the compression nut 12 (portion b in fig. 1).
The connector include an external screw thread connector 31 and direction head 32, be equipped with the internal thread in the one end of tubular metal resonator 2, the connector passes through the external screw thread to be connected with the internal thread cooperation of tubular metal resonator 2, direction head 32 one end becomes calabash column structure and links to each other with the connector, the other end becomes the round platform form and draws the piece to link to each other. Adopt guide head 32 that calabash form and round platform form combined together, the external diameter is crescent from right side to left, when drawing in PTFE pipe 1 along with drawing the piece, play the effect of direction, if do not have this guide structure, generally can only push away/draw in 1 ~ 2 meters, if need prepare the tubular product more than 3 meters, the degree of difficulty is great, and adopt this guide head 32 structure, can be convenient for the drawing of tubular metal 2 in PTFE pipe 1, pass through the PTFE pipe smoothly, can also extrude the discharge with the air in PTFE pipe 1 at the in-process of drawing simultaneously, avoid having gaseous residue, influence the heat conductivity.
The traction element is a traction rod 33 or other traction elements such as a traction chain.
The traction driving device is a hydraulic cylinder or a traction device driven by a motor (not shown in the figure).
The method for compounding the PTFE composite pipe by adopting the compounding device comprises the following steps:
A. one end of the PTFE pipe 1 is flanged outwards to form a horn shape (a part shown in figure 1 a) by adopting the seamless PTFE pipe 1 and is clamped and fixed by the PTFE pipe end clamping device 10, so that the PTFE pipe 1 is axially fixed, and meanwhile, the port of the PTFE pipe 1 is flared (horn shape) so as to be convenient for drawing in the metal pipe 2.
B. The joint of the metal tube drawing device 30 is connected to the metal tube 2, and the drawing member is passed through the PTFE tube 1 and connected to a drawing drive device provided at the other end of the PTFE tube 1.
C. The PTFE tube 1 is heated and expanded by the PTFE tube heating apparatus 20. Because the PTFE tube 1 and the metal tube 2 are made of two materials, the thermal expansion coefficients are different, particularly, the PTFE tube 1 is easy to thermally expand when being heated (the heat exchange working condition temperature is higher, the PTFE tube 1 can generate the thermal expansion phenomenon above 150 degrees), when the PTFE tube 1 and the metal tube 2 are compounded, gaps or bubbles are generated when being heated due to the different thermal expansion coefficients, the heat conduction performance of the PTFE tube and the metal tube can be seriously influenced, the thermal conductivity coefficient can be reduced by dozens of times, and the application of the heat exchanger is not facilitated. In contrast, when the invention is compounded, the whole PTFE tube 1 is heated firstly, steam or other heating methods can be adopted in the PTFE tube heating device 20, the heating temperature is 150-280 ℃ (the temperature simulates the temperature of the heat exchange working condition), and the PTFE tube 1 is expanded firstly.
D. The metal pipe 2 is pulled into the PTFE pipe 1 from the left end of the PTFE pipe at a constant speed by the driving of a traction driving device until the metal pipe is compounded with the whole PTFE pipe 1. Through calculation, the outer diameter of the drawn-in metal pipe 2 is designed to be in interference fit with the inner diameter of the PTFE pipe 1 after being heated and expanded, so that the PTFE pipe 1 is artificially heated to 150-280 ℃ for thermal expansion, the interference fit can ensure that no air bubbles exist between the metal pipe 2 and the PTFE pipe 1, when the PTFE pipe is used, even under the heat exchange working condition of 150-280 ℃, the PTFE pipe is cooled to the normal temperature (the PTFE pipe 1 is cooled to be more tightly attached to the metal pipe 2 due to cold contraction, and the metal pipe 2 is stable relative to the PTEF pipe), the metal pipe 2 can be attached to the PTFE pipe 1 at all times, no air gap is generated, and the heat conducting performance of the composite pipe is ensured. Through repeated tests and calculation, the traction speed of the traction driving device is 0.2-0.8 m/min, so that the metal pipe 2 can be ensured to be smoothly compounded with the PTFE pipe 1, air can be exhausted, and bubbles are avoided.
In conclusion, the composite device and the preparation method of the PTFE composite pipe can overcome a series of problems of generating gaps, influencing heat conductivity coefficient and the like caused by different thermal expansion coefficients between metal and PTFE pipes, expand the application range of the PTFE pipe heat exchanger and prolong the service life of the PTFE pipe heat exchanger under special working conditions of high temperature, high pressure and high corrosion.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that the changes and modifications of the above embodiments are within the scope of the appended claims as long as they are within the true spirit of the present invention.

Claims (10)

1. The utility model provides a set composite of compound pipe of PTFE which characterized in that: including PTFE pipe end clamping device, PTFE pipe heating device, tubular metal resonator draw gear, the both ends of PTFE pipe are located respectively to a pair of PTFE pipe end clamping device, every PTFE pipe end clamping device all includes a pair of annular anchor clamps, it is fixed to press from both sides outside turn-ups's PTFE pipe end portion, PTFE pipe heating device locates between two PTFE pipe end clamping device, wear to locate the inside PTFE pipe of PTFE pipe heating device to the level and heat, tubular metal resonator draw gear is including the connector that is used for being connected with an external diameter and PTFE pipe internal diameter assorted tubular metal resonator end, connect in the connector other end and pass the piece that pulls of PTFE pipe, connect in the traction drive device who pulls the piece other end, it is intraductal with the PTFE pipe drawing-in heating through traction drive device, and with PTFE pipe interference fit.
2. The PTFE composite tube composite apparatus of claim 1, wherein: the pair of annular clamps clamp the end parts of the PTFE pipe through a hydraulic device.
3. The composite assembly of PTFE composite tubing of claim 1, wherein: the pair of annular fixtures, the annular fixture that is located the turn-ups outside of PTFE pipe tip is equipped with the external screw thread, is equipped with a gland nut that has the internal screw thread on the annular fixture that is located the turn-ups inboard of PTFE pipe tip, through gland nut and the annular fixture threaded connection that is located the turn-ups outside of PTFE pipe tip.
4. The PTFE composite tube composite apparatus of claim 1, wherein: the connector include an external screw thread connector and direction head, be equipped with the internal thread in the one end of tubular metal resonator, the connector passes through the external screw thread to be connected with the internal thread cooperation of tubular metal resonator, direction head one end becomes calabash column structure and links to each other with the connector, the other end becomes the round platform form and draws the piece to link to each other.
5. The composite device of the PTFE composite tube of claim 1 or 4, wherein: the traction piece is a traction rod.
6. The PTFE tube composite of claim 5, wherein: the traction driving device is a hydraulic cylinder.
7. A composite method of a PTFE composite pipe is characterized in that: the method comprises the following steps:
A. adopting a seamless PTFE pipe, flanging one end of the PTFE pipe outwards into a horn shape, and clamping and fixing the end through a PTFE pipe end clamping device;
B. connecting a connector of a metal tube traction device to the metal tube, and enabling a traction piece to penetrate through the PTFE tube and be connected with a traction driving device arranged at the other end of the PTFE tube;
C. heating and expanding the PTFE pipe by a PTFE pipe heating device;
D. the metal pipe is pulled into the PTFE pipe by the driving of the traction driving device and is compounded with the PTFE pipe.
8. The method for compounding PTFE composite pipe according to claim 7, wherein: the outer diameter of the metal pipe is in interference fit with the inner diameter of the PTFE pipe after being heated and expanded.
9. The method for compounding PTFE composite pipe according to claim 7, wherein: the heating temperature is 150-280 ℃.
10. The method for compounding PTFE composite pipe according to claim 7, wherein: the traction speed of the traction driving device is 0.2-0.8 m/min.
CN201710299172.7A 2017-04-28 2017-04-28 Composite device and composite method of PTFE composite pipe Active CN106938547B (en)

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Application Number Priority Date Filing Date Title
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CN106938547B true CN106938547B (en) 2022-11-08

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2205299Y (en) * 1993-10-08 1995-08-16 籍英杰 Interference pulling line steel plastic composite pipe working device
CN2344632Y (en) * 1998-09-09 1999-10-20 伍昆宪 Aluminium-plastics composite pipe
CN2397334Y (en) * 1999-11-17 2000-09-20 湘潭市少雄铝业有限公司 Composite tube
CN1319495A (en) * 2001-02-27 2001-10-31 陈俊林 Method for making steel-plastics composite pipe
CN2749594Y (en) * 2004-11-29 2006-01-04 方大集团股份有限公司 Glass tube drawing machine used for metal multiple-unit tube processing
TWM289665U (en) * 2005-11-11 2006-04-21 Allied Supreme Corp Automatic tube drawing facilities for internal lining of metal pipework
CN207028238U (en) * 2017-04-28 2018-02-23 江苏金由新材料有限公司 A kind of set composite of PTFE multiple tubes

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2205299Y (en) * 1993-10-08 1995-08-16 籍英杰 Interference pulling line steel plastic composite pipe working device
CN2344632Y (en) * 1998-09-09 1999-10-20 伍昆宪 Aluminium-plastics composite pipe
CN2397334Y (en) * 1999-11-17 2000-09-20 湘潭市少雄铝业有限公司 Composite tube
CN1319495A (en) * 2001-02-27 2001-10-31 陈俊林 Method for making steel-plastics composite pipe
CN2749594Y (en) * 2004-11-29 2006-01-04 方大集团股份有限公司 Glass tube drawing machine used for metal multiple-unit tube processing
TWM289665U (en) * 2005-11-11 2006-04-21 Allied Supreme Corp Automatic tube drawing facilities for internal lining of metal pipework
CN207028238U (en) * 2017-04-28 2018-02-23 江苏金由新材料有限公司 A kind of set composite of PTFE multiple tubes

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