CN112658066B - Oil and gas pipeline hot bending processing method and device - Google Patents
Oil and gas pipeline hot bending processing method and device Download PDFInfo
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- CN112658066B CN112658066B CN202011420994.4A CN202011420994A CN112658066B CN 112658066 B CN112658066 B CN 112658066B CN 202011420994 A CN202011420994 A CN 202011420994A CN 112658066 B CN112658066 B CN 112658066B
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Abstract
The invention discloses a method and a device for processing oil and gas pipeline simmering elbow pipes, wherein the method for processing the oil and gas pipeline simmering elbow pipes comprises the following steps: s1, carrying out local heat treatment processing on the steel pipe to locally plasticize the steel pipe; s2, bending and stretching the steel pipe through a rocker arm; s3, shaping the steel tube row at the steel tube bending starting point to make the bending part of the obtained steel tube more in line with the standard; s4, continuously stretching the steel pipe to obtain a bent pipe, wherein the oil and gas pipeline simmering bent pipe processing method and the device are used for processing the simmering bent pipe of the oil and gas pipeline, and shaping the steel pipe in the pipe bending process can effectively shape the bent pipe so that the shape and the size of the bent pipe can better meet the set standards.
Description
Technical Field
The invention relates to the technical field of oil and gas pipeline processing, in particular to a method and a device for processing a simmering bent pipe of an oil and gas pipeline.
Background
In the oil gas field of carrying, the pipeline that uses usually includes hot bending bend and conventional straight tube, and hot bending bend mainly used special topography pipeline turns to connect, is that pipeline engineering bears comparatively special harsh part, and mechanical properties to the product requires very strictly.
The process of bending the hot bent pipe comprises the following steps: after the straight pipe is blanked, an induction coil is sleeved on the part to be bent of the steel pipe through a bent pipe pushing machine, a mechanical rotating arm is used for clamping a pipe head, medium-frequency current is introduced into the induction coil to heat the steel pipe, when the temperature of the steel pipe rises to a plastic state, the rear end of the steel pipe is pushed by mechanical thrust to be bent, the bent steel pipe part is rapidly cooled by coolant, and the bent pipe is continuously bent while heating, pushing, bending and cooling.
The manufacturing process of the hot bending elbow is complex, and in the process of hot bending the oil and gas pipeline, the pipeline is bent to cause the deformation of the pipeline, so that the pipeline is not favorable for the connection of the pipeline, and the excessive deformation can cause the stress concentration of the pipeline wall to influence the mechanical property and the service life of the pipeline.
Disclosure of Invention
The invention aims to solve the problem that pipeline deformation is caused by pipeline bending in the process of bending an oil and gas pipeline in the prior art, and provides a method and a device for processing the oil and gas pipeline hot bending pipeline.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for processing a hot bent pipe of an oil and gas pipeline comprises the following steps:
s1: carrying out local heat treatment processing on the steel pipe to enable the steel pipe to be locally plasticized:
s2: bending and stretching the steel pipe through a rocker arm;
s3: shaping the steel pipe at the bending starting point of the steel pipe, so that the bent part of the obtained steel pipe is more in line with the standard;
s4: and continuously stretching the steel pipe to obtain the bent pipe.
The shaping process in step S3 includes the steps of:
a1: using a ring-shaped piece with a corresponding size to prop against the steel pipe from the outside of the steel pipe;
a2: blowing air at high pressure inside the steel pipe to make the wall of the steel pipe stick to the inner wall of the annular part;
a3: the steel pipe is cooled from the outside and the inside on both sides.
The shaping treatment is to arrange a shaped annular die outside the steel pipe, then enable the pipe wall with plasticity to be attached to the inner wall of the die through high-pressure gas, finish shaping and cooling shaping, and effectively shape the steel pipe at a bend, so that the shape and the size of the steel pipe are more in line with set standards.
The oil and gas pipeline simmering elbow processing device comprises a rack, wherein a feeding roller, an induction heating ring, a shaping ring, a clamping piece and a rocker arm are arranged on the rack, one end of a steel pipe passes through the feeding roller, the induction heating ring and the shaping ring in sequence and then is clamped by the clamping piece, one end of the rocker arm is rotatably connected with the rack, and the other end of the rocker arm is fixedly connected with the clamping piece. The feed roller is used for feeding of steel pipes, the induction heating ring enables the steel pipe to be connected, the steel pipe is heated and plasticized, one end of the steel pipe is pulled by the clamping piece, the steel pipe is bent according to the radius of the steel pipe, and the steel pipe is shaped by the shaping ring.
Furthermore, a suspended disc and a plurality of mould sheets used for combining to form an annular part are arranged in the shaping ring, the mould sheet combination can form a standard elbow pipe annular part, the standard elbow pipe annular part is an arc-shaped cylindrical mould at one end of an ideal elbow pipe and is used as a mould of a steel pipe bend, and the corresponding central angle R is 3-5 degrees. And an air cylinder is arranged between the die sheet and the inner part of the shaping ring and is used for controlling the combination and separation of the die sheet.
Furthermore, the position of the suspension disc corresponds to the die piece, a cavity is arranged in the suspension disc, an annular main air duct and a pressurizing bend which are communicated with the cavity are arranged on the annular wall of the suspension disc, the air outlet of the main air duct is opposite to the die piece, the main air duct is used for inputting high-pressure air, and shaping treatment is carried out on the steel pipe between the suspension disc and the die piece.
Furthermore, two sides of the inner wall of the main air passage are provided with supercharging cavities, impellers are arranged in the supercharging cavities and are rotatably connected with the suspended plate, at least one blade of each impeller is attached to the wall of the supercharging cavity, one end of at least one blade of each impeller is positioned in the main air passage, and the supercharging cavities are communicated with the supercharging curved channel. The air flow in the cavity enters the pressurizing bend to push the impeller to rotate, and the blades of the impeller also drive the high-pressure air in the main air passage to improve the air flow speed and enhance the air pressure.
Furthermore, auxiliary air passages are arranged on two sides of the main air passage, a blocking piece is arranged at one end inside the auxiliary air passage and is in sliding sealing connection with the auxiliary air passage, an elastic piece is arranged between the blocking piece and the auxiliary air passage, and the other end of the auxiliary air passage is communicated with the pressurizing curve. The inside air current of cavity gets into supplementary air flue through pressure boost bend, can promote the separation blade and stretch out from supplementary air flue, and the separation blade stretches out and can form annular baffle in main air flue both sides, and the inner wall of two baffles, unsettled dish outer wall and steel pipe forms relative confined space, can further strengthen the plastic effect of high-pressure gas to steel pipe return bend department.
Furthermore, an air inlet pipe is arranged on one side of the suspension disc, the cavity is communicated with the air inlet pipe, the air inlet end of the air inlet pipe is communicated with a hot air pipeline and a cold air pipeline respectively, the hot air pipeline is used for blowing high-pressure air into the cavity for shaping the steel pipe, the cold air pipeline is used for blowing air into the cavity for cooling the inner wall after shaping the steel pipe, and the shaping effect of the curve of the steel pipe is kept.
Further, one side that the die is close to the plastic circle sets up the air cock, the air cock is located the both ends of plastic circle, be certain contained angle between the direction of giving vent to anger of air cock and the die tangential direction, the scope of contained angle satisfies following condition: when the cylinder is in a safe contraction state, the air outlet direction of the air tap can enter between the adjacent die sheet and the steel pipe. The gas sprayed out of the gas nozzle is used for cooling the outer wall of the shaped steel pipe, so that the shaping effect of the bend of the steel pipe is kept.
Furthermore, the rack is provided with a support rod and a positioning magnetic block corresponding to the support rod in position, one end of the air inlet pipe is fixedly connected with the support rod, the support rod is a permanent magnet, an electromagnetic winding is arranged inside the positioning magnetic block, and the positioning magnetic block and the support rod are mutually acted by magnetic force and used for supporting the support rod to perform suspended positioning of the support rod.
Further, the rack is further provided with a sliding rail, and the sliding rail is fixedly connected with the clamping piece, so that the pipe bending process of the steel pipe is more stable.
The invention has the beneficial effects that:
1. the method and the device for processing the oil and gas pipeline simmering elbow are used for processing the simmering elbow of the oil and gas pipeline, and can be used for shaping the steel pipe in the elbow process, so that the bend shaping can be effectively carried out on the steel pipe, and the shape and the size can better meet the set standard.
2. This oil gas pipeline bending machine hot bent pipe processingequipment carries out the design treatment through high-pressure gas to the steel pipe, to the contact of steel pipe when reducing the plastic, avoids steel pipe inner wall to bring the adhesive destruction, keeps the smooth surface of return bend department, guarantees the good mechanical properties of return bend department.
3. This oil gas pipeline is stewed a hot bent pipe processingequipment is through impeller reinforcing gas pressure when the plastic to form relative confined space through the baffle, further strengthen high-pressure gas and carry out the plastic effect to the steel pipe, the reliable operation degree height.
Drawings
FIG. 1 is a diagram of a shaping step in the oil and gas pipeline simmering and hot bending processing method;
FIG. 2 is a schematic structural diagram of the oil and gas pipeline simmering bend processing device before bending;
FIG. 3 is a schematic structural diagram of the oil and gas pipeline after bending the pipe by the bending hot bending processing device;
FIG. 4 is a schematic view of the radial structure of the integral ring (mold piece separation) of the oil-gas pipeline hot bending processing device;
FIG. 5 is a schematic structural view of the whole ring radial direction (mold piece combination) of the oil and gas pipeline hot bending processing device;
FIG. 6 is a schematic axial structure diagram of an integral ring of the oil-gas pipeline hot bending processing device;
FIG. 7 is a schematic structural view of a side surface (with a retractable baffle) of a suspended plate of the oil-gas pipeline hot bending processing device;
FIG. 8 is a schematic structural view of a main air duct of the oil and gas pipeline hot bending processing device;
FIG. 9 is a schematic structural view of a side surface (with a separation blade extending out) of a suspended plate of the oil-gas pipeline hot bending processing device;
FIG. 10 is a schematic view of the radial structure of the suspended plate (with the separation blade extended) of the bending pipe processing device for oil and gas pipeline heating;
fig. 11 is an axial structural schematic diagram of the annular part for shaping of the oil and gas pipeline hot bending processing device.
In the figure: 1. a feed roller; 2. an induction heating coil; 3. shaping rings; 4. a slide rail; 5. a clamping member; 6. a rocker arm; 7. a steel pipe; 8. suspending the tray; 9. an air inlet pipe; 10. a support bar; 11. a positioning magnetic block; 31. a stamper; 32. a cylinder; 33. an air tap; 101. a hot air duct; 102. a cold air duct; 81. an impeller; 82. an elastic member; 83. a baffle plate; 801. a cavity; 802. pressurizing the curve; 803. an auxiliary airway; 804. a main air passage; 805. a pressurizing cavity.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example 1
A method for processing a hot bent pipe of an oil and gas pipeline comprises the following steps:
s1: carrying out local heat treatment processing on the steel pipe to enable the steel pipe to be locally plasticized:
s2: bending and stretching the steel pipe through a rocker arm;
s3: shaping the steel pipe at the bending starting point of the steel pipe, so that the bent part of the obtained steel pipe is more in line with the standard;
s4: and continuously stretching the steel pipe to obtain the bent pipe.
Referring to fig. 1, the shaping process in step S3 includes the steps of:
a1: using a ring-shaped piece with a corresponding size to prop against the steel pipe from the outside of the steel pipe;
a2: blowing air at high pressure inside the steel pipe to make the wall of the steel pipe stick to the inner wall of the annular part;
a3: the steel pipe is cooled from the outside and the inside on both sides.
The shaping treatment is to arrange a shaped annular die outside the steel pipe, then enable the pipe wall with plasticity to be attached to the inner wall of the die through high-pressure gas, finish shaping and cooling shaping, and effectively shape the steel pipe at a bend, so that the shape and the size of the steel pipe are more in line with set standards.
Example 2
Referring to fig. 2, an oil gas pipeline hot bending processing device based on the oil gas pipeline hot bending processing method in embodiment 1 includes a frame, a feed roller 1, an induction heating ring 2, a shaping ring 3, a clamping member 5 and a rocker arm 6 are arranged on the frame, one end of a steel pipe 7 is clamped by the clamping member 5 after passing through the feed roller 1, the induction heating ring 2 and the shaping ring 3 in sequence, one end of the rocker arm 6 is rotatably connected with the frame, an end of a rotating shaft of the rocker arm 6 is fixedly connected with a rotating motor, and the other end of the rocker arm 6 is fixedly connected with the clamping member 5. The feed roller 1 is used for feeding of steel pipe 7, and induction heating circle 2 makes and connects steel pipe 7 to generate heat and plasticize, the one end of holder 5 pulling steel pipe 7 makes steel pipe 7 carry out the tube bending according to using rocking arm 6 as the radius, and plastic circle 3 carries out plastic processing to the steel pipe.
Further, referring to fig. 4, 5 and 11, the shaping ring 3 is internally provided with a suspension plate 8 and a plurality of mold sheets 31 for combining to form a ring, and the combination of the mold sheets 31 can form a standard elbow ring as a mold for a curve of the steel pipe 7, and the corresponding central angle R is 3-5 °. An air cylinder 32 is arranged between the mold piece 31 and the inner part of the shaping ring 3 and is used for controlling the combination and separation of the mold piece 31.
Further, referring to fig. 6, the position of the suspension tray 8 corresponds to the mold piece 31, a cavity 801 is arranged inside the suspension tray 8, referring to fig. 7, an annular main air duct 804 and a pressurization curve 802 which are communicated with the cavity 801 are arranged on the annular wall of the suspension tray 8, an air outlet of the main air duct 804 is opposite to the mold piece 31, and the main air duct 804 is used for inputting high-pressure air to shape the steel pipe 7 between the suspension tray 8 and the mold piece 31.
Furthermore, two sides of the inner wall of the main air passage 804 are provided with a pressurizing cavity 805, an impeller 81 is arranged in the pressurizing cavity 805, the impeller 81 is rotatably connected with the suspension plate 8, at least one blade of the impeller 81 is attached to the cavity wall of the pressurizing cavity 805, one end of at least one blade of the impeller 81 is positioned in the main air passage 804, and the pressurizing cavity 805 is communicated with the pressurizing curve 802. The air flow in the cavity 801 enters the supercharging curved channel 802 to push the impeller 81 to rotate, and the blades of the impeller 81 also drive the high-pressure air in the main air channel 804 to increase the air flow speed and enhance the air pressure.
Furthermore, auxiliary air passages 803 are arranged on two sides of the main air passage 804, a baffle 83 is arranged at one end inside the auxiliary air passage 803, the baffle 83 is connected with the auxiliary air passage 803 in a sliding and sealing manner, an elastic element 82 is arranged between the baffle 83 and the auxiliary air passage 803, and the other end of the auxiliary air passage 803 is communicated with the pressurizing curve 802. The air flow in the cavity 801 enters the auxiliary air passage 803 through the pressurization curve 802, the baffle 83 can be pushed to extend out of the auxiliary air passage 803, referring to fig. 8, 9 and 10, the baffle 83 extends out to form annular baffles at two sides of the main air passage 804, the two baffles, the outer wall of the suspension disc 8 and the inner wall of the steel pipe 7 form a relative sealed space, and the shaping effect of high-pressure air on the bent pipe of the steel pipe 7 can be further enhanced.
In this embodiment, the position of the stop piece 83 is provided with a limiting structure, which is not shown, and when the stop piece 83 reaches the limit position, the stop piece 83 is still not in contact with the inner wall of the steel pipe 7.
In this embodiment, referring to fig. 8, the blocking pieces 83 are at least two layers, which can block the gap between the blocking pieces 83 to form a relatively sealed baffle, and help the two baffles, the outer wall of the hanging plate 8 and the inner wall of the steel pipe 7 to form a relatively sealed space.
Further, referring to fig. 6, an air inlet pipe 9 is arranged on one side of the suspension disc 8, the cavity 801 is communicated with the air inlet pipe 9, an air inlet end of the air inlet pipe 9 is respectively communicated with a hot air pipeline 91 and a cold air pipeline 92, the hot air pipeline 91 is used for blowing high-pressure air into the cavity 801 for shaping the steel pipe 7, and the cold air pipeline 92 is used for blowing air into the cavity 801 for cooling the inner wall of the shaped steel pipe 7 and maintaining the shaping effect of the curved channel of the steel pipe 7.
Further, referring to fig. 4 and 5, one side that the die 31 is close to the shaping ring 3 sets up the air cock 33, the air cock 33 is located the both ends of shaping ring 3, be certain contained angle between the direction of giving vent to anger of air cock 33 and the tangential direction of die 31, the scope of contained angle satisfies following condition: when the air cylinder 32 is in a safe contraction state, the air outlet direction of the air nozzle 33 can enter between the adjacent matrix 31 and the steel pipe 7. The gas from the gas nozzles 33 is used for cooling the outer wall of the shaped steel pipe 7, thereby maintaining the shaping effect of the curve of the steel pipe 7.
Further, referring to fig. 6, the rack is provided with a support rod 10 and a positioning magnetic block 11 corresponding to the support rod 10, one end of the air inlet pipe 9 is fixedly connected with the support rod 10, the support rod 10 is a permanent magnet, an electromagnetic winding is arranged inside the positioning magnetic block 11, the support rod 10 at the position can be a square pipe, the positioning magnetic block 11 can be a square frame with a corresponding shape, and the magnetic force between the positioning magnetic block 11 and the support rod 10 interacts with each other to support the support rod 10 for suspension positioning of the support rod 10.
When specific part is selected for use, for making the structure more reliable stable, bracing piece 10 also can direct sliding connection in frame, and here bracing piece 10 sliding connection is used for avoiding hindering the installation of steel pipe, but need additionally set up limit structure for the location of bracing piece 10 and unsettled dish 8.
Further, the frame still sets up slide rail 4, slide rail 4 and 5 fixed connection of holder for the return bend process of steel pipe 7 is more stable.
This oil gas pipeline heats bent pipe processingequipment's working process includes following several steps:
the method comprises the following steps: the positioning magnetic block 11 is electrified, the suspension disc 8 is suspended in the shaping ring 3, at the moment, the mold sheet 31 is in a separation state, the steel pipe 7 is installed on the rack, and after one end of the steel pipe 7 penetrates through the feeding roller 1, the induction heating ring 2 and the shaping ring 3, the clamping piece 5 clamps one end of the steel pipe 7.
Step two: the rotating motors corresponding to the induction heating coil 2, the feeding roller 1 and the rocker arm 6 are turned on, the rocker arm 6 rotates when the feeding roller 1 feeds the steel pipe 7, the clamping piece 5 pulls one end of the steel pipe 7 to bend the pipe, the steel pipe 7 passes through the induction heating coil 2, and the induction heating coil 2 enables the steel pipe 7 to generate heat and plasticize.
Step three: the plasticized steel pipe 7 passes through the shaping ring 3, and at this time, the swing arm 6 stops rotating. Referring to fig. 5 and 11, the cylinder 32 is extended to combine the dies 31 to form a standard elbow annular member, then high-pressure gas is injected into the air inlet pipe 9, the high-pressure gas enters the boost curved channel 802 and the main air duct 804 through the cavity 801, a part of the air flow entering the boost curved channel 802 enters the boost cavity 805 to push the impeller 81 to rotate, and the blades of the impeller 81 drive the high-pressure gas in the main air duct 804 to increase the flow speed of the gas and enhance the air pressure; the other part of the high-pressure gas enters the auxiliary air passage 803 to push the baffle 83 to extend out of the auxiliary air passage 803, referring to fig. 8, 9 and 10, the baffle 83 extends out to form annular baffles at two sides of the main air passage 804, and the two baffles, the outer wall of the suspension disc 8 and the inner wall of the steel pipe 7 form a relatively sealed space, so that the shaping effect of the high-pressure gas on the bent pipe of the steel pipe 7 can be further enhanced; when the high-pressure gas reaches the inner wall of the steel pipe 7, the pressure is applied to the inner wall of the steel pipe 7, so that the pipe wall of the steel pipe 7 is attached to the inner wall of the annular part, and shaping is completed.
Step four: the cylinder 32 is contracted to separate the mold 31, and at the same time, the hot air duct is closed, and the elastic member 82 pulls the flap 83 back.
Step five: and opening the cold air pipeline, filling air into the air inlet pipe 9, cooling the inner wall of the shaped steel pipe 7, and simultaneously opening the air nozzles 33, wherein the air sprayed from the air nozzles 33 is used for cooling the outer wall of the shaped steel pipe 7, so that the shaping effect of the curve of the steel pipe 7 is kept.
Step 6: and after cooling, the rocker arm 6 continues rotating, the clamping piece 5 continues pulling the steel pipe 7 to perform pipe bending treatment, and continues shaping the bent pipe part of the next section of steel pipe, and the process is circulated until the whole pipe bending process is completed.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. A processing method for bending oil and gas pipelines in a simmer mode is characterized by comprising the following steps:
s1: carrying out local heat treatment processing on the steel pipe to enable the steel pipe to be locally plasticized:
s2: bending and stretching the steel pipe through a rocker arm;
s3: shaping the steel pipe at the bending starting point of the steel pipe;
s4: continuously stretching the steel pipe to obtain a bent pipe;
the shaping process in step S3 includes the steps of:
a1: using a ring-shaped piece with a corresponding size to prop against the steel pipe from the outside of the steel pipe;
a2: blowing air at high pressure inside the steel pipe to make the wall of the steel pipe stick to the inner wall of the annular part;
a3: cooling the steel pipe from the outside and the inside in a double-sided manner;
the oil-gas pipeline hot bending processing method is realized through an oil-gas pipeline hot bending processing device, the oil-gas pipeline hot bending processing device comprises a feeding roller (1), an induction heating ring (2), a shaping ring (3), a clamping piece (5) and a rocker arm (6), one end of a steel pipe (7) passes through the feeding roller (1), the induction heating ring (2) and the shaping ring (3) in sequence and then is clamped by the clamping piece (5), one end of the rocker arm (6) is rotatably connected with a rack, and the other end of the rocker arm (6) is fixedly connected with the clamping piece (5);
a suspended disc (8) and a plurality of mold sheets (31) used for combining to form a ring-shaped part are arranged in the shaping ring (3), and a cylinder (32) is arranged between the mold sheets (31) and the inside of the shaping ring (3); a cavity (801) is arranged in the suspension disc (8), and an annular main air passage (804) and a pressurizing bend (802) which are communicated with the cavity (801) are arranged on the annular wall of the suspension disc (8);
two sides of the inner wall of the main air passage (804) are provided with supercharging cavities (805), an impeller (81) is arranged in the supercharging cavities (805), at least one blade of the impeller (81) is attached to the wall of the supercharging cavity (805), one end of at least one blade of the impeller (81) is positioned in the main air passage (804), and the supercharging cavity (805) is communicated with a supercharging elbow (802);
the auxiliary air passage (803) is arranged on two sides of the main air passage (804), a blocking piece (83) is arranged at one end inside the auxiliary air passage (803), the blocking piece (83) is connected with the auxiliary air passage (803) in a sliding and sealing mode, an elastic piece (82) is arranged between the blocking piece (83) and the auxiliary air passage (803), and the other end of the auxiliary air passage (803) is communicated with the pressurizing curve (802).
2. The oil and gas pipeline simmer bending pipe processing method according to claim 1, wherein an air inlet pipe (9) is arranged on one side of the suspension disc (8), the cavity (801) is communicated with the air inlet pipe (9), the rack is provided with a support rod (10) and a positioning magnetic block (11) corresponding to the support rod (10), one end of the air inlet pipe (9) is fixedly connected with the support rod (10), the support rod (10) is a permanent magnet, and an electromagnetic winding is arranged inside the positioning magnetic block (11).
3. The oil and gas pipeline simmer bending pipe processing method according to claim 2, wherein an air inlet end of the air inlet pipe (9) is respectively communicated with a hot air pipeline (91) and a cold air pipeline (92);
one side that die (31) are close to plastic circle (3) sets up air cock (33), air cock (33) are located the both ends of plastic circle (3), be certain contained angle between the direction of giving vent to anger of air cock (33) and die (31) tangential direction, the scope of contained angle satisfies following condition: when the air cylinder (32) is in a safe contraction state, the air outlet direction of the air nozzle (33) can enter between the adjacent matrix (31) and the steel pipe (7).
4. The oil and gas pipeline simmer hot bend processing method according to claim 1 or 3, wherein the frame is further provided with a slide rail (4), and the slide rail (4) is fixedly connected with the clamping piece (5).
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| CN202011420994.4A CN112658066B (en) | 2020-12-08 | 2020-12-08 | Oil and gas pipeline hot bending processing method and device |
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| CN202011420994.4A CN112658066B (en) | 2020-12-08 | 2020-12-08 | Oil and gas pipeline hot bending processing method and device |
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| JP3400767B2 (en) * | 2000-02-28 | 2003-04-28 | 徹 佐藤 | Steel pipe bending apparatus and method |
| CN202192125U (en) * | 2011-08-24 | 2012-04-18 | 湖南宏旺石油有限公司 | Air pressure shaper for oil drums |
| CN202367019U (en) * | 2011-12-19 | 2012-08-08 | 中国石油天然气集团公司 | Sensing heating pipe bender cooling system |
| CN102672007A (en) * | 2012-05-08 | 2012-09-19 | 哈尔滨工业大学 | Internal heating and pressurizing pipe distortion rectification device and method |
| CN103736795B (en) * | 2014-01-10 | 2016-05-25 | 株洲双菱科技有限公司 | A kind of steel pipe fire bending space bending method and fire bending space bent pipe machine |
| CN105665490A (en) * | 2014-11-19 | 2016-06-15 | 朱小宏 | Mode-switchable thin-wall steel tube machining device |
| CN104690117B (en) * | 2015-03-27 | 2017-03-01 | 华电重工股份有限公司 | The especially big radius elbow of large diameter thick wall steel pipe and its forming method |
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