CN114932172B - Bimetal composite pipe production device and method thereof - Google Patents
Bimetal composite pipe production device and method thereof Download PDFInfo
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- CN114932172B CN114932172B CN202210689040.6A CN202210689040A CN114932172B CN 114932172 B CN114932172 B CN 114932172B CN 202210689040 A CN202210689040 A CN 202210689040A CN 114932172 B CN114932172 B CN 114932172B
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- 239000002131 composite material Substances 0.000 title claims abstract description 66
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000007789 sealing Methods 0.000 claims abstract description 95
- 239000000112 cooling gas Substances 0.000 claims abstract description 62
- 239000007789 gas Substances 0.000 claims abstract description 51
- 238000010438 heat treatment Methods 0.000 claims abstract description 49
- 238000001816 cooling Methods 0.000 claims abstract description 16
- 238000007599 discharging Methods 0.000 claims description 4
- 239000013013 elastic material Substances 0.000 claims description 4
- 230000001808 coupling effect Effects 0.000 abstract description 7
- 239000007788 liquid Substances 0.000 description 8
- 238000013329 compounding Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 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
- 230000005489 elastic deformation Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000010410 layer 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
- 150000001875 compounds Chemical class 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000011229 interlayer 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
- 238000009987 spinning Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
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
Landscapes
- 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 bimetal composite pipe production method, which use 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. A bimetal composite pipe production device comprises a first sealing head, an elastic supporting ring, a die, a heating device, a second sealing head, an air pressure bulging and air cooling system; the die and the base pipe of the bimetal composite pipe are fixed through an elastic supporting ring, so that a uniform gap is reserved 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 tube of the bimetal composite tube, the heating device is used for heating the bimetal composite tube, and the pneumatic bulging and air cooling system is used for injecting high-pressure gas and cooling gas into the liner tube to expand and cool the bimetal composite tube.
Description
Technical Field
The invention relates to a bimetal composite pipe production device and a bimetal composite pipe production method.
Background
The diversification of the conveying medium and the complexity of the conveying environment put higher demands on the performances of strength, corrosion resistance, high temperature resistance and the like of the pipeline, and the requirements can be met by selecting a proper bimetal composite pipe. The bimetal 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 supporting strength, the liner pipe is used for resisting corrosion or abrasion, and the bimetal composite pipe has the advantages of two materials of the base pipe and the liner pipe and is widely applied in the petroleum and natural gas industry.
Currently, bimetal composite pipes include metallurgical composite pipes and mechanical composite pipes. The bonding interface of the metallurgical composite pipe is in a metallurgical bonding state, so that the quality is good, and the performance is excellent; however, the process is complicated, limited by materials 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, has low production cost, is less influenced by materials than a metallurgical composite pipe, and is particularly a composite pipe produced by the liquid expansion forming method, has relatively uniform interlayer contact pressure distribution and is easy to control; the inner surface of the liner tube has no scratch and damage phenomena and no work hardening phenomena; the quality of the pipe body is good.
The pressure transmission medium used in the existing liquid expansion forming process is water, and in the expanding process, the liner tube can be contacted with the water, and in the one-time compounding process, one-time water filling and draining processes are required. In order to ensure the quality of the bimetal composite pipe, the gaps at the two ends of the liner pipe and the base pipe are required to be sealed and welded or a waterproof sealing ring is additionally arranged before the bimetal composite pipe is compounded, so that no moisture enters between the liner pipe and the base pipe, and the process is complicated.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention provides a bimetal composite pipe production device and a bimetal composite pipe production method, which use the coupling effect of thermal expansion and air pressure expansion, simplify the bulging composite process, save the production and manufacturing cost, and have zero emission and no pollution.
The technical scheme for solving the problems is as follows: the device for producing the bimetal composite pipe is characterized in that:
comprises a first sealing head, an elastic supporting ring, a die, a heating device, a second sealing head, an air pressure bulging and air cooling system;
the die and the base pipe of the bimetal composite pipe are fixed through an elastic supporting ring, so that a uniform gap is reserved 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 tube of the bimetal composite tube, the heating device is used for heating the bimetal composite tube, and the pneumatic bulging and air cooling system is used for injecting high-pressure gas and cooling gas into the liner tube to expand and cool the bimetal composite tube.
Further, the pneumatic bulging and gas cooling system comprises a cooling gas input pipeline, a cooling gas output pipeline and a high-pressure gas 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 pressure relief of the liner tube and discharge of the cooling gas.
Further, 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; the high-pressure gas input pipeline is provided with a gas booster and a high-pressure gas input valve,
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.
Further, the heating device adopts an infrared heating pipe, and the infrared heating pipe is arranged on the second sealing head.
Further, the sealing part of the first sealing head, the sealing part of the second sealing head and the elastic supporting ring are made of high-temperature resistant elastic materials.
Further, 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, and the single-piston cylinder is hinged to the cylinder support and drives the connecting rod to move through the single-piston cylinder, so that the first sealing head is realized.
Further, the mold further comprises at least two supporting legs, wherein the supporting legs are used for supporting the mold.
Further, the first sealing head includes a sealing portion and a connecting portion, the sealing portion is in a tapered structure, and the connecting portion is fixed with the connecting rod.
Further, the pipe in the first sealing head extends from the connecting portion to the sealing portion after entering.
In addition, the invention also provides a production method of the bimetal composite pipe production device, which is characterized by comprising the following steps of:
step one: fixing the mould and the base pipe together through an elastic supporting ring, then placing the liner pipe in the base pipe, and integrally placing the mould, the base pipe and the liner pipe on the supporting 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 clamping force between the first sealing head and the second sealing head is used for automatically centering the liner tube and sealing the liner tube;
step three: opening an infrared heating pipe to heat the base pipe and the liner pipe simultaneously;
step four: opening a high-pressure gas input valve to fill the liner tube with high-pressure gas, and performing high-pressure bulging on the heated liner tube and the base tube; in the process of pneumatic bulging, the infrared heating pipe is always opened, so that 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 the cooling gas input valve, and introducing cooling gas to cool the bimetal composite pipe after the bulging is finished until the temperature reaches the room temperature;
step six: and controlling the movement of the single-piston cylinder to enable the first sealing head to be separated from the liner tube, and taking down the bimetal composite tube after bulging is completed.
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 heat 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 bimetal tube is not contacted with liquid in the compounding process, avoid the problem of liquid entering between the liner tube and the base tube layer, and improve the forming quality of the bimetal compound tube.
3. By utilizing the coupling effect of thermal expansion and pneumatic bulging, the bimetal tube can be compounded at a lower temperature and gas pressure in a shorter time.
4. Because of the special placement position of the elastic support ring, the bimetal tube can be integrally formed at one time without secondary processing.
Drawings
FIG. 1 is a schematic illustration of the operation of a device for producing bimetallic composite tubes by coupling thermal expansion to pneumatic expansion;
FIG. 2 is a schematic illustration of the liner, base pipe and mold in place, secured to a production device;
fig. 3 is a schematic diagram of the bimetal composite pipe when the composite is completed.
Reference numerals illustrate: 1-first sealing head, 2-elastic support ring, 3-mould, 4-base pipe, 5-liner pipe, 6-infrared heating pipe, 7-second sealing head, 8-landing leg, 9-connecting rod support, 10-connecting rod, 11-cylinder support, 12-single piston cylinder, 13-pneumatic bulging and air cooling system, 101-cooling gas input valve, 102-high pressure gas input valve, 103-cooling gas output valve, 104-gas booster, 105-cooling gas input pipeline, 106-high pressure gas input pipeline, 107-cooling gas output pipeline.
Detailed Description
For the purpose of making 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 in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, are intended to fall within the scope of the present invention. Thus, the following detailed description of the embodiments of the invention, as 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 bimetal composite pipe production device with the coupling effect of thermal expansion and air pressure expansion, which makes use of the difference of the thermal expansion coefficients of different metals to simultaneously expand two metal pipes or independently expand a liner pipe to tightly adhere to a base pipe at high temperature, then simultaneously cools the tightly adhered bimetal pipes, and generates a holding force between the bimetal pipes to realize the forming of the bimetal composite pipe; on the other hand, compared with the traditional hydraulic bulging, the pneumatic bulging can ensure that the bimetal tube is not contacted with liquid in the bulging compounding process, and the problem of liquid seepage between the liner tube and the base tube layer is completely eradicated. Compared with the single thermal expansion or pneumatic bulging technology, the device utilizes the combined action of multiple pressures, and the required heating temperature and the gas pressure are lower and are easier to reach. And the bulging composite process is simplified, the production and manufacturing cost is saved, and the method has zero emission and no pollution.
Referring to fig. 1-3, an embodiment of the present invention provides a bimetal composite pipe production device, which comprises a first sealing head 1, an elastic supporting ring 2, a mold 3, a heating device, a second sealing head 7, and an air bulging and 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 reserved 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 pneumatic 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 tube, the high-pressure gas input line 106 is used for injecting high-pressure gas into the liner tube, and the cooling gas output line 107 is used for decompressing the high-pressure gas of the liner tube and discharging the cooling gas.
As a preferred embodiment of the present invention, a pipe is provided in the first sealing head 1, and 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 inside of the liner pipe in operation.
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 provided in the high pressure gas input line 106. The second sealing head 7 is internally provided with a pipeline, an outlet of the pipeline is connected with a cooling gas output pipeline 107, an inlet of the pipeline is communicated with the inside of the liner pipe in operation, and a cooling gas output valve is arranged on the cooling gas output pipeline 107.
As a preferred embodiment of the invention, the heating means may be an infrared heating tube 6, the infrared heating tube 6 being mounted on a second sealing head 7, which in operation protrudes into the interior of the liner.
As a preferred embodiment of the present 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 with one end of the connecting rod 10, the other end of the connecting rod 10 is hinged with the connecting rod support 9, the single piston cylinder 12 is hinged with the middle part of the connecting rod 10, the single piston cylinder 12 is hinged with the 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 sealing or unsealing of the liner tube is realized.
As a preferred embodiment of the present invention, the bimetal composite pipe production device further comprises at least two legs 8, the legs 8 for supporting the die 3.
As a preferred embodiment of the present invention, the first sealing head 1 includes a sealing portion and a connecting portion, wherein the sealing portion has a conical structure, and the conical structure seals off the end of the liner. The connection portion is fixed to the connection rod 10.
As a preferred embodiment of the present invention, the pipe in the first sealing head 1 is extended from the side wall of the connecting portion radially, and then is turned into the sealing portion to extend axially.
Examples
Referring to fig. 1-3, a bimetal composite pipe production device with coupling effect of thermal expansion and air pressure expansion comprises a first sealing head 1, a die 3, an infrared heating pipe 6, a second sealing head 7 and an air pressure bulging and cooling system 13.
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 communicates with the liner 5 through the first seal head 1; the cooling gas input valve 101 is arranged at one end of the cooling gas input pipeline 105 extending out of the first sealing head 1; the high-pressure gas inlet valve 102 is provided in a high-pressure gas input line 106 communicating with a cooling gas input line 105, and a gas booster 104 is provided in the high-pressure gas input line 106. The cooling gas output line 107 communicates with the other end of the liner 5 through the second seal head 7; the cooling gas output valve 103 is provided at an end of the cooling gas output line 107 extending beyond the second sealing head 7. The mould 3 and the base pipe 4 are fixed through the elastic support ring 2, so that a uniform gap is reserved between the mould 3 and the base pipe 4; the mould 3 is placed on the legs 8.
The heating device adopts an infrared heating pipe 6, the infrared heating pipe 6 is arranged on a second sealing head 7, and the heating device 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 supporting 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, a 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 first sealing head 1 is driven to move by controlling the single-piston cylinder 12.
As shown in fig. 1, the device for producing the bimetal composite pipe with the coupling effect of thermal expansion and air pressure expansion comprises the following steps:
step one: the first sealing head 1 is in a horizontal state by controlling the movement of the single-piston cylinder 12, the mould 3 and the base pipe 4 are fixed together by the elastic supporting ring 2, then the liner pipe 5 is arranged in the base pipe 4, and the mould 3, the base pipe 4 and the liner pipe 5 are integrally arranged on the supporting legs 8 by means of lifting and the like. The preparation is completed as shown in fig. 2.
Step two: the first sealing head 1 is placed in a vertical state by the movement of the single piston cylinder 12. At this time, 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: and opening the infrared heating pipe 6, and heating the base pipe 4 and the liner pipe 5 for 3-5min.
Step four: the high-pressure gas input valve 102 is opened, high-pressure gas is filled 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 pneumatic bulging, the infrared heating pipe 6 is always opened, and the base pipe 4 and the liner pipe 5 are insulated.
Step five: after the bulging is completed, the infrared heating pipe 6 is turned off 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 room temperature is reached.
Step six: the first sealing head 1 is moved to a horizontal state, and the bimetal composite pipe with the bulging completed is taken down.
In the third step, the heating temperature of the infrared heating pipe ranges from 300 ℃ to 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 coupling effect of thermal expansion and air pressure expansion provided by the invention works, the base pipe and the liner pipe are sleeved together, then the base pipe and the liner pipe are heated by the infrared heating pipe, and after the base pipe and the liner pipe are heated to a specified temperature, the liner pipe is subjected to air pressure bulging, so that the liner pipe is elastically deformed at first, the pressure is continuously increased, the liner pipe is tightly attached to the base pipe, at the moment, a small amount of plastic deformation is generated on the liner pipe, and only the elastic deformation is generated on the base pipe. And then the pressure is removed, flowing air is introduced, air cooling is carried out, the compounded bimetallic tube is cooled to the room temperature, and the compounding process is completed. The device has simple production procedures, adopts an infrared heating pipe for heating, has the advantages of quick temperature rise, high heat efficiency and low energy consumption, and reduces the production cost of the bimetal composite pipe compared with the modes of heating by a resistance furnace, induction heating and the like; the device adopts pneumatic bulging, and compared with the traditional hydraulic bulging, the risk of liquid seepage between the tubes in the compounding process of the bimetal composite tube is avoided.
The foregoing description is only exemplary embodiments of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes using the descriptions and the drawings of the present invention, or direct or indirect application in other related system fields are included in the scope of the present invention.
Claims (6)
1. The utility model provides a bimetal composite pipe apparatus for producing which characterized in that:
comprises a first sealing head (1), an elastic supporting ring (2), a die (3), a heating device, a second sealing head (7), 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 reserved 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 (5) of the bimetal composite tube, the heating device is used for heating the bimetal composite tube, and the pneumatic bulging and air cooling system (13) is used for injecting high-pressure gas and cooling gas into the liner tube (5) so as to expand and cool the bimetal composite tube;
the first sealing head (1) is fixedly connected with the connecting rod (10), the connecting rod (10) is hinged with the connecting rod support (9), the single-piston cylinder (12) is hinged with the connecting rod (10), the single-piston cylinder (12) is hinged with the cylinder support (11), and the connecting rod (10) is driven to move through the single-piston cylinder (12), so that the first sealing head (1) is actuated;
the pneumatic bulging and air 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 tube (5), the high-pressure gas input pipeline (106) is used for injecting high-pressure gas into the liner tube (5), and the cooling gas output pipeline (107) is used for pressure relief of the liner tube (5) and discharge of the cooling gas;
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),
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);
the heating device adopts an infrared heating pipe (6), and the infrared heating pipe (6) is arranged on the second sealing head (7).
2. A bimetal composite pipe production device according to claim 1, wherein:
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.
3. A bimetal composite pipe production device according to claim 2, wherein:
also comprises at least two support legs (8), wherein the support legs (8) are used for supporting the die (3).
4. A bimetal composite pipe production device according to claim 3, 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).
5. The apparatus for producing a bimetal composite pipe according to claim 4, wherein:
the pipeline in the first sealing head (1) extends to the sealing part after entering from the connecting part.
6. A production method based on a bimetal composite pipe production device according to any one of claims 3 to 5, characterized by comprising the following steps:
step one: fixing the die (3) and the base pipe (4) together through the elastic support ring (2), then placing the liner pipe (5) in the base pipe (4), and integrally placing the die (3), the base pipe (4) and the liner pipe (5) on the supporting legs (8);
step two: one end of the liner tube (5) is sealed by the second sealing head (7), the movement of the single piston cylinder (12) is controlled, the first sealing head (1) seals 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 an infrared heating pipe (6) and heating 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 process of pneumatic bulging, the infrared heating pipe (6) is always opened, and the base pipe (4) and the liner pipe (5) are insulated;
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), and introducing cooling gas to cool the bimetal composite pipe after the bulging is finished until the temperature reaches the room temperature;
step six: and controlling the movement of the single-piston cylinder (12) to enable the first sealing head (1) to be separated from the liner tube (5), and taking down the expanded bimetal composite tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210689040.6A CN114932172B (en) | 2022-06-17 | 2022-06-17 | Bimetal composite pipe production device and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN114932172A (en) | 2022-08-23 |
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