CN114932172A - Production device and method for bimetal composite pipe - Google Patents
Production device and method for bimetal composite pipe Download PDFInfo
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- CN114932172A CN114932172A CN202210689040.6A CN202210689040A CN114932172A CN 114932172 A CN114932172 A CN 114932172A CN 202210689040 A CN202210689040 A CN 202210689040A CN 114932172 A CN114932172 A CN 114932172A
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- 239000002131 composite material Substances 0.000 title claims abstract description 70
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000007789 sealing Methods 0.000 claims abstract description 92
- 239000000112 cooling gas Substances 0.000 claims abstract description 60
- 239000007789 gas Substances 0.000 claims abstract description 48
- 238000010438 heat treatment Methods 0.000 claims abstract description 48
- 238000001816 cooling Methods 0.000 claims abstract description 21
- 230000033001 locomotion Effects 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- 239000013013 elastic material Substances 0.000 claims description 4
- 238000004321 preservation Methods 0.000 claims description 2
- 230000001808 coupling effect Effects 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 description 8
- 238000013329 compounding Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- 230000005489 elastic deformation Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
- B21D39/046—Connecting tubes to tube-like fittings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
- B21D26/045—Closing or sealing means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
- B21D26/051—Deforming double-walled bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/053—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure characterised by the material of the blanks
- B21D26/059—Layered blanks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/16—Heating or cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/08—Tube expanders
- B21D39/20—Tube expanders with mandrels, e.g. expandable
- B21D39/203—Tube expanders with mandrels, e.g. expandable expandable by fluid or elastic material
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Laminated Bodies (AREA)
Abstract
The invention relates to a bimetal composite pipe production device and a method thereof, which utilize the coupling action of thermal expansion and air pressure expansion, simplify the bulging composite process, save the production and manufacturing cost, and realize zero emission and no pollution. A production device for a bimetal composite pipe comprises a first sealing head, an elastic support ring, a die, a heating device, a second sealing head and an air pressure bulging and air cooling system; the die and the base pipe of the bimetal composite pipe are fixed through the elastic support ring, so that a uniform gap is ensured between the die and the base pipe; the first sealing head and the second sealing head are used for sealing two ends of a liner pipe of the bimetal composite pipe, the heating device is used for heating the bimetal composite pipe, and the air pressure bulging and air cooling system is used for injecting high-pressure gas and cooling gas into the liner pipe to expand and cool the bimetal composite pipe.
Description
Technical Field
The invention relates to a device and a method for producing a bimetal composite pipe.
Background
The diversification of the conveying media and the complexity of the conveying environment provide higher requirements for the strength, corrosion resistance, high temperature resistance and other properties of the pipeline, and the requirements can be met by selecting a proper bimetal composite pipe. The bimetallic composite pipe is a novel pipe combining two different metal pipes together through plastic deformation or a certain connecting technology, the base pipe is used for strength support, the liner pipe is used for resisting corrosion or abrasion, the bimetallic composite pipe has the advantages of two materials of the base pipe and the liner pipe, and the bimetallic composite pipe is widely applied to the petroleum and natural gas industry.
The existing bimetal composite pipe comprises a metallurgical composite pipe and a mechanical composite pipe. The bonding interface of the metallurgical composite pipe is in a metallurgical bonding state, and has good quality and excellent performance; but the process is complicated, limited by the material and high in production cost. The mechanical composite pipe mainly comprises a mechanical spinning method, a mechanical drawing method, a liquid expansion forming method and the like, the mechanical composite pipe is low in production cost and less influenced by materials than a metallurgical composite pipe, and particularly, the interlayer contact pressure distribution of the composite pipe produced by the liquid expansion forming method is uniform and easy to control; the inner surface of the liner tube has no scratching and damaging phenomena and no work hardening phenomenon; the pipe body is of good quality.
The pressure transmission medium used in the existing liquid expansion forming process is water, a liner tube can be contacted with the water in the expansion forming process, and a water filling and draining process is carried out in a primary compounding process. In addition, in order to ensure the quality of the bimetal composite pipe, before the bimetal composite pipe is composited, the gaps between the liner pipe and the two ends of the base pipe are required to be sealed and welded or waterproof sealing rings are additionally arranged, so that no moisture enters between the liner pipe and the base pipe, and the working procedures are more complicated.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention provides a device and a method for producing a bimetal composite pipe, which utilize the coupling effect of thermal expansion and air pressure expansion, simplify the bulging composite process, save the production and manufacturing cost, and realize zero emission and no pollution.
The technical scheme for solving the problems is as follows: a bimetal composite pipe production device is characterized in that:
the device comprises a first sealing head, an elastic support ring, a mould, a heating device, a second sealing head and an air pressure bulging and air cooling system;
the die and the base pipe of the bimetal composite pipe are fixed through the elastic support ring, so that a uniform gap is ensured between the die and the base pipe; the first sealing head and the second sealing head are used for sealing two ends of a liner pipe of the bimetal composite pipe, the heating device is used for heating the bimetal composite pipe, and the air pressure bulging and air cooling system is used for injecting high-pressure gas and cooling gas into the liner pipe to expand and cool the bimetal composite pipe.
Further, the air pressure bulging and air cooling system comprises a cooling air input pipeline, a cooling air output pipeline and a high-pressure air input pipeline; the cooling gas input pipeline is used for injecting cooling gas into the liner tube, the high-pressure gas input pipeline is used for injecting high-pressure gas into the liner tube, and the cooling gas output pipeline is used for releasing pressure of the liner tube and discharging the cooling gas.
Furthermore, a pipeline is arranged in the first sealing head, an inlet of the pipeline is communicated with a cooling gas input pipeline and a high-pressure gas input pipeline, and a cooling gas input valve is arranged on the cooling gas input pipeline; a gas booster and a high-pressure gas input valve are arranged on the high-pressure gas input pipeline,
and a pipeline is arranged in the second sealing head, an outlet of the pipeline is connected with a cooling gas output pipeline, and a cooling gas output valve is arranged on the cooling gas output pipeline.
Furthermore, the heating device adopts an infrared heating pipe, and the infrared heating pipe is arranged on the second sealing head.
Furthermore, the sealing part of the first sealing head, the sealing part of the second sealing head and the elastic support ring are made of high-temperature resistant elastic materials.
Furthermore, the first sealing head is fixedly connected with the connecting rod, the connecting rod is hinged to the connecting rod support, the single piston cylinder is hinged to the connecting rod, the single piston cylinder is hinged to the cylinder support, and the connecting rod is driven to move through the single piston cylinder, so that the action of the first sealing head is achieved.
Further, the die also comprises at least two supporting legs, and the supporting legs are used for supporting the die.
Further, the first sealing head comprises a sealing part and a connecting part, the sealing part is of a conical structure, and the connecting part is fixed with the connecting rod.
Further, the pipe in the first sealing head extends from the connecting portion to the sealing portion.
In addition, the invention also provides a production method of the production device of the bimetal composite pipe, which is characterized by comprising the following steps:
the method comprises the following steps: fixing the mould and the base pipe together through the elastic support ring, then placing the liner pipe in the base pipe, and integrally placing the mould, the base pipe and the liner pipe on the support legs;
step two: the second sealing head is used for sealing one end of the liner tube, the movement of the single-piston cylinder is controlled, the first sealing head is used for sealing the other end of the liner tube, and the liner tube is sealed while the liner tube is automatically centered by using the clamping force between the first sealing head and the second sealing head;
step three: opening the infrared heating pipe, and heating the base pipe and the liner pipe simultaneously;
step four: opening a high-pressure gas input valve to enable the liner tube to be filled with high-pressure gas, and performing high-pressure bulging on the heated liner tube and the base tube; in the process of air pressure bulging, the infrared heating pipe is always opened, and the base pipe and the liner pipe are insulated;
step five: after the bulging is finished, closing the infrared heating pipe, opening a cooling gas output valve, discharging high-pressure gas, opening a cooling gas input valve, introducing cooling gas, and cooling the bulging-finished bimetal composite pipe until the temperature is room temperature;
step six: and controlling the movement of the single-piston cylinder to separate the first sealing head from the liner tube, and taking down the expanded bimetallic composite tube.
The invention has the advantages that:
1. the invention adopts the infrared heating pipe for heating, and the technology has the advantages of rapid temperature rise, high thermal efficiency, low energy consumption, easy temperature control and the like, and can improve the production efficiency and reduce the production cost.
2. Compared with the traditional hydraulic bulging, the pneumatic bulging can ensure that the bimetallic tube does not contact with liquid in the compounding process, the problem of liquid inlet between the liner tube and the base tube layer is avoided, and the forming quality of the bimetallic composite tube is improved.
3. By utilizing the coupling effect of thermal expansion and air pressure bulging, the bimetal pipe compounding can be completed at lower temperature and air pressure in a shorter time.
4. Due to the special placement position of the elastic support ring, the bimetallic tube can be integrally formed at one time without secondary processing.
Drawings
FIG. 1 is a schematic diagram of the operation of a bimetallic composite pipe production plant with thermal expansion coupled with pneumatic expansion;
FIG. 2 is a schematic view of the liner, base pipe and mold in place, secured to the production apparatus;
fig. 3 is a schematic diagram of the bimetal composite pipe when the compounding is completed.
Description of reference numerals: 1-a first sealing head, 2-an elastic support ring, 3-a mould, 4-a base tube, 5-a liner tube, 6-an infrared heating tube, 7-a second sealing head, 8-a support leg, 9-a connecting rod support, 10-a connecting rod, 11-a cylinder support, 12-a single piston cylinder, 13-an air pressure bulging and air cooling system, 101-a cooling gas input valve, 102-a high-pressure gas input valve, 103-a cooling gas output valve, 104-a gas supercharger, 105-a cooling gas input pipeline, 106-a high-pressure gas input pipeline, and 107-a cooling gas output pipeline.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
The invention aims to provide a production device of a bimetal composite pipe with thermal expansion and air pressure expansion coupling effects, on one hand, the difference of thermal expansion coefficients of different metals is utilized to simultaneously expand two metal pipes at high temperature or enable a liner pipe to be singly expanded to be attached to a base pipe, and then the attached bimetal pipes are simultaneously cooled to generate holding force between the bimetal pipes, so that the bimetal composite pipe is formed; on the other hand, compared with the traditional hydraulic bulging, the bimetallic pipe can be prevented from contacting with liquid in the bulging compounding process by utilizing air pressure expansion, and the problem that liquid seeps into the interlayer between the liner pipe and the base pipe is completely avoided. Compared with the independent thermal expansion or air pressure bulging technology, the device utilizes the combined action of multiple pressures, and the required heating temperature and air pressure are lower and can be more easily achieved. And the bulging composite process is simplified, the production and manufacturing cost is saved, and zero emission and no pollution are realized.
Referring to fig. 1 to 3, an embodiment of the present invention provides an apparatus for producing a bimetal composite tube, including a first sealing head 1, an elastic support ring 2, a mold 3, a heating device, a second sealing head 7, and an air pressure bulging and air cooling system 13.
The die 3 and the base pipe of the bimetal composite pipe are fixed through the elastic support ring 2, so that a uniform gap is ensured between the die 3 and the base pipe 4; the first sealing head 1 and the second sealing head 7 are used for sealing two ends of a liner tube of the bimetal composite tube, the heating device is used for heating the bimetal composite tube, and the air pressure bulging and air cooling system 13 is used for injecting high-pressure gas and cooling gas into the liner tube to expand and cool the bimetal composite tube.
As a preferred embodiment of the present invention, the gas pressure bulging and gas cooling system 13 comprises a cooling gas input line 105, a cooling gas output line 107 and a high pressure gas input line 106. The cooling gas input line 105 is used for injecting cooling gas into the liner, the high-pressure gas input line 106 is used for injecting high-pressure gas into the liner, and the cooling gas output line 107 is used for relieving the pressure of the high-pressure gas in the liner and discharging the cooling gas.
In a preferred embodiment of the present invention, the first sealing head 1 is provided with a pipe, an inlet of the pipe is communicated with the cooling gas input line 105 and the high-pressure gas input line 106, and an outlet of the pipe is communicated with the interior of the liner tube during operation.
A cooling gas input valve 101 is arranged on the cooling gas input pipeline 105; the high-pressure gas input line 106 is provided with a gas booster 104 and a high-pressure gas input valve 102. The second sealing head 7 is internally provided with a pipeline, the outlet of the pipeline is connected with a cooling gas output pipeline 107, the inlet of the pipeline is communicated with the inside of the liner tube during working, and the cooling gas output pipeline 107 is provided with a cooling gas output valve.
As a preferred embodiment of the present invention, the heating device may be an infrared heating tube 6, and the infrared heating tube 6 is mounted on the second sealing head 7 and extends into the liner tube during operation.
As a preferred embodiment of the invention, the sealing part of the first sealing head 1, the sealing part of the second sealing head 7 and the elastic supporting ring 2 are made of high-temperature resistant elastic materials.
As a preferred embodiment of the present invention, the first sealing head 1 is fixedly connected to one end of a connecting rod 10, the other end of the connecting rod 10 is hinged to a connecting rod support 9, a single piston cylinder 12 is hinged to the middle of the connecting rod 10, the single piston cylinder 12 is hinged to a cylinder support 11, and the single piston cylinder 12 drives the connecting rod 10 to move, so that the first sealing head 1 acts, and finally the end of the liner tube is sealed or unsealed.
As a preferred embodiment of the present invention, the bimetal composite pipe production apparatus further comprises at least two legs 8, the legs 8 being used for supporting the mold 3.
As a preferred embodiment of the present invention, the first sealing head 1 comprises a sealing portion and a connecting portion, the sealing portion has a tapered structure, and the tapered structure blocks the end of the liner tube. The connecting portion is fixed to the connecting rod 10.
As a preferred embodiment of the invention, after the pipeline in the first sealing head 1 radially extends into the side wall of the connecting part, the pipeline turns into the sealing part and axially extends out.
Examples
Referring to fig. 1-3, a device for producing a bimetal composite tube with thermal expansion and air pressure expansion coupling effects comprises a first sealing head 1, a die 3, an infrared heating tube 6, a second sealing head 7, and an air pressure bulging and air cooling system 13.
The gas pressure bulging and gas cooling system 13 includes a cooling gas input line 105, a cooling gas output line 107, and a high pressure gas input line 106.
The cooling gas input line 105 communicates with the liner 5 through the first gland 1; the cooling gas input valve 101 is arranged at one end of the cooling gas input pipeline 105, which extends out of the first sealing head 1; the high-pressure gas inlet valve 102 is provided on a high-pressure gas input line 106 communicating with a cooling gas input line 105, and a gas booster 104 is provided on the high-pressure gas input line 106. A cooling gas outlet line 107 is communicated with the other end of the liner tube 5 through a second sealing head 7; the cooling gas outlet valve 103 is provided at an end of the cooling gas outlet line 107 extending out of the second sealing head 7. The mould 3 and the base tube 4 are fixed through the elastic support ring 2, so that a uniform gap is ensured between the mould 3 and the base tube 4; the mould 3 is placed on the legs 8.
The heating device adopts an infrared heating pipe 6, and the infrared heating pipe 6 is arranged on a second sealing head 7 and is positioned in the liner pipe 5 during working. The sealing part of the first sealing head 1, the sealing part of the second sealing head 7 and the elastic support ring 2 are made of high-temperature resistant elastic materials.
The first sealing head 1 is fixedly connected with a connecting rod 10, the connecting rod 10 is hinged with a connecting rod support 9, the single piston cylinder 12 is hinged with the connecting rod 10, and the single piston cylinder 12 is hinged with a cylinder support 11; the single piston cylinder 12 is controlled to drive the first sealing head 1 to move.
As shown in fig. 1, when the apparatus for producing a bimetal composite pipe with thermal expansion coupled with air pressure expansion is used for producing the bimetal composite pipe, the forming process comprises the following steps:
the method comprises the following steps: through the motion of control single piston cylinder 12, make first sealing head 1 be in the horizontality, utilize elastic support ring 2 to fix mould 3 and parent tube 4 together, then place bushing pipe 5 in parent tube 4, through modes such as hoist and mount, place mould 3, parent tube 4, bushing pipe 5 on landing leg 8 wholly. The preparation is complete as shown in fig. 2.
Step two: the first sealing head 1 is brought into a vertical position by the movement of the single-piston cylinder 12. At this time, the liner 5 is sealed while the liner 5 is automatically centered by the clamping force between the first sealing head 1 and the second sealing head 7.
Step three: and opening the infrared heating pipe 6, and heating the base pipe 4 and the liner pipe 5 for 3-5min at the same time.
Step four: the high-pressure gas input valve 102 is opened, high-pressure gas is injected into the liner tube 5 through the gas booster 104, and the heated liner tube 5 and the base tube 4 are subjected to high-pressure bulging, so that the pressure is increased to 80% of the maximum elastic deformation of the base tube 4. In the process of air pressure bulging, the infrared heating pipe 6 is always opened, and plays a role in heat preservation on the base pipe 4 and the liner pipe 5.
Step five: at the end of bulging, infrared heating tube 6 is closed, as shown in fig. 3. And opening a cooling gas output valve 103, discharging high-pressure gas, opening a cooling gas input valve 101, introducing cooling gas, and cooling the expanded bimetal composite pipe until the temperature is room temperature.
Step six: and (3) moving the first sealing head 1 to a horizontal state, and taking down the expanded bimetal composite pipe.
In the third step, the heating temperature range of the infrared heating pipe is 300-400 ℃, and the heating temperature is related to the material of the steel pipe and the required binding force.
In summary, when the bimetal composite pipe production device with the thermal expansion and air pressure expansion coupling effects provided by the invention works, the base pipe and the liner pipe are firstly required to be sleeved together, then the base pipe and the liner pipe are heated by the infrared heating pipe, after the base pipe and the liner pipe are heated to a specified temperature, the liner pipe is subjected to air pressure bulging, the liner pipe is firstly subjected to elastic deformation, the pressure is continuously increased, the liner pipe is tightly attached to the base pipe, at the moment, the liner pipe is subjected to a small amount of plastic deformation, and the base pipe is only subjected to elastic deformation. And then, removing the pressure, introducing flowing air, carrying out air cooling, cooling the compounded bimetallic pipe to the room temperature, and finishing the compounding process. The device has simple production process, adopts the infrared heating pipe for heating, has the advantages of fast temperature rise, high thermal efficiency and low energy consumption, and reduces the production cost of the bimetal composite pipe compared with the modes of heating by using a resistance furnace, induction heating and the like; the device adopts air pressure bulging, and compared with the traditional hydraulic bulging, the risk of liquid seepage between the pipes in the process of compounding the bimetal composite pipe is avoided.
The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes performed by the present invention or directly or indirectly applied to other related system fields are also included in the scope of the present invention.
Claims (10)
1. The utility model provides a bimetal composite pipe apparatus for producing which characterized in that:
comprises a first sealing head (1), an elastic support ring (2), a mould (3), a heating device, a second sealing head (7) and an air pressure bulging and air cooling system (13);
the die (3) and the base pipe (4) of the bimetal composite pipe are fixed through the elastic support ring (2), so that a uniform gap is ensured between the die (3) and the base pipe (4); the first sealing head (1) and the second sealing head (7) are used for sealing two ends of a liner pipe (5) of the bimetal composite pipe, the heating device is used for heating the bimetal composite pipe, and the air pressure bulging and air cooling system (13) is used for injecting high-pressure gas and cooling gas into the liner pipe (5) to expand and cool the bimetal composite pipe.
2. The apparatus for producing a bimetallic composite pipe as in claim 1, wherein:
the air pressure bulging and gas cooling system (13) comprises a cooling gas input pipeline (105), a cooling gas output pipeline (107) and a high-pressure gas input pipeline (106);
the cooling gas input pipeline (105) is used for injecting cooling gas into the liner (5), the high-pressure gas input pipeline (106) is used for injecting high-pressure gas into the liner (5), and the cooling gas output pipeline (107) is used for pressure relief of the liner (5) and discharge of the cooling gas.
3. The apparatus for producing a bimetallic composite pipe according to claim 2, wherein:
a pipeline is arranged in the first sealing head (1), an inlet of the pipeline is communicated with a cooling gas input pipeline (105) and a high-pressure gas input pipeline (106), and a cooling gas input valve (101) is arranged on the cooling gas input pipeline (105); a gas booster (104) and a high-pressure gas input valve (102) are arranged on the high-pressure gas input pipeline (106),
and a pipeline is arranged in the second sealing head (7), an outlet of the pipeline is connected with a cooling gas output pipeline (107), and a cooling gas output valve is arranged on the cooling gas output pipeline (107).
4. A bimetallic composite pipe production plant as in claim 3, characterized in that:
the heating device adopts an infrared heating pipe (6), and the infrared heating pipe (6) is arranged on the second sealing head (7).
5. The apparatus for producing a bimetallic composite pipe according to claim 4, wherein:
the sealing part of the first sealing head (1), the sealing part of the second sealing head (7) and the elastic support ring (2) are made of high-temperature-resistant elastic materials.
6. The apparatus for producing a bimetallic composite pipe according to claim 5, wherein:
first sealed head (1) and connecting rod (10) fixed connection, connecting rod (10) are articulated with connecting rod support (9), and single piston cylinder (12) are articulated with connecting rod (10), and single piston cylinder (12) are articulated with cylinder support (11), drive connecting rod (10) through single piston cylinder (12) and move to realize first sealed head (1) action.
7. The apparatus for producing a bimetallic composite pipe according to claim 6, wherein:
the mould further comprises at least two legs (8), and the legs (8) are used for supporting the mould (3).
8. The apparatus for producing a bimetallic composite pipe according to claim 7, wherein:
the first sealing head (1) comprises a sealing part and a connecting part, wherein the sealing part is of a conical structure, and the connecting part is fixed with the connecting rod (10).
9. The apparatus for producing a bimetallic composite pipe as in claim 8, wherein:
the pipeline in the first sealing head (1) extends to the sealing part after entering from the connecting part.
10. The production method of the bimetal composite pipe production device according to any one of claims 1 to 9, characterized by comprising the following steps:
the method comprises the following steps: the die (3) and the base pipe (4) are fixed together through the elastic support ring (2), then the liner pipe (5) is placed in the base pipe (4), and the die (3), the base pipe (4) and the liner pipe (5) are integrally placed on the support legs (8);
step two: one end of the liner tube (5) is closed by the second sealing head (7), the movement of the single-piston cylinder (12) is controlled, the first sealing head (1) closes the other end of the liner tube (5), and the liner tube (5) is sealed while the liner tube (5) is automatically centered by the clamping force between the first sealing head (1) and the second sealing head (7);
step three: opening the infrared heating pipe (6) to heat the base pipe (4) and the liner pipe (5) simultaneously;
step four: opening a high-pressure gas input valve (102) to enable the liner tube (5) to be filled with high-pressure gas, and performing high-pressure bulging on the heated liner tube (5) and the base tube (4); in the air pressure bulging process, the infrared heating pipe (6) is always opened, and plays a role in heat preservation on the base pipe (4) and the liner pipe (5);
step five: after the bulging is finished, closing the infrared heating pipe (6), opening a cooling gas output valve (103), discharging high-pressure gas, opening a cooling gas input valve (101), introducing cooling gas, and cooling the bulging-finished bimetal composite pipe until the temperature is room temperature;
step six: and controlling the movement of the single-piston cylinder (12) to separate the first sealing head (1) from the liner tube (5), and taking down the expanded bimetallic composite tube.
Priority Applications (1)
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