A device and method for upset forming of a casing end

Abstract

The application discloses an oil casing end upset forming device and method, relates to the technical field of upsetting, and comprises a fixing mechanism, the fixing mechanism is provided with a plurality of fixing stations for storing oil casings, and the fixing stations are linearly distributed; at least two heating mechanisms and at least two first hydraulic telescopic cylinders, the heating mechanisms and the first hydraulic telescopic cylinders are one-to-one spaced apart, and correspond to the oil casing ends on the fixing stations respectively, and the telescopic end of the first hydraulic telescopic cylinder is provided with an inner mold; and a tube pushing mechanism, the tube pushing mechanism is arranged parallel to the fixing mechanism, is used for sequentially conveying the oil casings on the fixing stations, and realizes automatic transmission. The application realizes continuous operation of the oil casing end upsetting through the multi-station linear distribution design and the automatic transmission of the tube pushing mechanism, significantly shortens the production cycle, and the automatic transmission also reduces manual intervention and reduces the production capacity loss caused by operation delay.

Description

Technical Field

[0001] This invention relates to the field of upsetting technology, and specifically to an upsetting device and method for oil casing end forming. Background Technology

[0002] With the rapid development of the oil and gas extraction industry, casing and tubing, as core components in oil and gas well drilling and production, directly affect the strength, sealing performance, and overall service life of pipeline connections through their end quality. Upsetting the casing and tubing ends is a crucial step in their manufacturing process. By heating and upsetting the pipe ends, specific geometric shapes and optimized mechanical properties are formed to meet the requirements of industry standards such as API 5CT for connection reliability and pressure resistance. However, existing casing and tubing end upsetting processes have significant shortcomings in terms of production efficiency, forming consistency, and operational safety.

[0003] Traditional upsetting processes for oil casing ends typically employ manually operated equipment, relying on multiple heating and upsetting cycles to achieve pipe end forming. This process presents the following technical problems: high labor intensity due to manual operation, requiring operators to frequently intervene in high-temperature environments, posing safety hazards such as burns or mechanical injuries, and long forming time per piece, resulting in low production efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide an upsetting and forming device and method for the end of oil casing pipe, which solves the problem that the traditional upsetting process for the end of oil casing pipe usually uses manually operated equipment, relies on multiple heating and upsetting cycles to achieve pipe end forming, and has high labor intensity.

[0005] The present invention solves the above-mentioned technical problems through the following technical solutions, the present invention comprising:

[0006] A fixing mechanism having multiple fixing stations for storing oil casing pipes, and the multiple fixing stations being linearly distributed;

[0007] At least two heating mechanisms and at least two first hydraulic telescopic cylinders are provided, and the plurality of heating mechanisms and the plurality of first hydraulic telescopic cylinders are arranged at intervals and correspond to the ends of the oil casings on the plurality of fixed work stations respectively. The telescopic end of the first hydraulic telescopic cylinder has an inner mold.

[0008] The pipe pushing mechanism is arranged in parallel with the fixing mechanism, and is used to sequentially transfer the oil casing pipe at multiple fixed positions to achieve automatic transmission.

[0009] At least two cleaning mechanisms are provided, which are located between the heating mechanism and the first hydraulic telescopic cylinder, and are used to remove the oxide scale from the surface of the oil casing after heating.

[0010] Preferably, the fixing mechanism comprises at least two linearly distributed supporting molds and a pressing assembly, the upper surface of the supporting mold is provided with a plurality of first arc-shaped grooves, the upper surface of the supporting mold is provided with a plurality of first inclined surfaces, the feeding direction of the oil jacket pipe is the high end of the first inclined surface, the oil jacket pipe rolls along the first inclined surface to realize the transmission of the oil jacket pipe, and the pressing assembly is used for fixing the oil jacket pipe in cooperation with the supporting mold.

[0011] Preferably, the pressing assembly comprises a second hydraulic telescopic cylinder fixed through a support, the telescopic end of the second hydraulic telescopic cylinder is fixed with an extrusion mold, the lower surface of the extrusion mold is provided with a plurality of second arc-shaped grooves, and the lower surface of the extrusion mold is provided with a plurality of second inclined surfaces.

[0012] Preferably, the cleaning mechanism comprises a fixing frame, a moving plate is transversely and slidably installed on the fixing frame, a first spring is installed on the fixing frame, the first spring gives the moving plate an acting force to move to the high end of the first inclined surface, a first roller and a cross air pipe are installed on the side of the moving plate close to the oil jacket pipe, the cross air pipe is connected with an external air pump through an air pipe, each end of the cross air pipe is provided with two air holes, and the high-pressure air streams sprayed from the two air holes are respectively directed to the inner and outer walls of the oil jacket pipe.

[0013] Preferably, a quick reset assembly is arranged on the fixing frame, the quick reset assembly comprises a vertical cylinder fixed to the fixing frame, the vertical cylinder is located close to the low end of the first inclined surface, a limiting block is slidably arranged in the vertical cylinder, the lower end of the limiting block extends out of the vertical cylinder and is provided with an inclined surface, a second spring for pushing the limiting block to move downward is arranged in the vertical cylinder, and a groove corresponding to the limiting block is arranged on the moving plate.

[0014] A liquid crystal elastic strip is installed on the fixing frame, the liquid crystal elastic strip is located close to the high end of the first inclined surface, an end of the fixing frame is connected with a pull rope, the end of the pull rope away from the liquid crystal elastic strip is connected with the upper end of the limiting block, so that when the liquid crystal elastic strip is deformed by heat, the limiting block is pulled to move upward.

[0015] Preferably, the pushing pipe mechanism comprises a third hydraulic telescopic cylinder fixed through a mounting seat, the telescopic end of the third hydraulic telescopic cylinder is fixed with a horizontal frame, the horizontal frame is provided with a plurality of lifting assemblies, and the plurality of lifting assemblies and the plurality of oil jacket pipes are vertically corresponding respectively.

[0016] The lifting assembly comprises a round shaft fixed to the transverse frame, one side of the round shaft is fixed with a first supporting plate, the other side is rotatably provided with a second supporting plate through a torsional spring, the second supporting plate is close to the low end of the first inclined surface, the second supporting plate is limited and fixed through an angle limiting piece, and the first supporting plate and the second supporting plate are symmetrically arranged at the center of the round shaft, and the upper surfaces of the first supporting plate and the second supporting plate are both provided with rubber pads.

[0017] Preferably, the angle limiting piece comprises a buckle frame slidably arranged on the lower surface of the second supporting plate through a U-shaped enclosing plate, and a slot formed in the round shaft, the lower end of the buckle frame is in the form of a hook, i.e. a latch portion, the latch portion is inserted into the slot, a tension spring is arranged between the U-shaped enclosing plate and the buckle frame, the tension spring gives the buckle frame a pulling force along the width direction of the second supporting plate, and the upper end of the buckle frame is provided with a horizontal baffle plate fixed to the side wall of the supporting mold.

[0018] Preferably, the upper end of the buckle frame is provided with a second roller.

[0019] Preferably, the heating mechanism comprises an induction heating device slidably arranged on the ground through a sliding rail slider structure and a fourth hydraulic telescopic cylinder arranged on the ground, the telescopic end of the fourth hydraulic telescopic cylinder is connected with the induction heating device, and the induction coil of the induction heating device is axially corresponding to the oil jacket pipe.

[0020] The application also provides a method for forming an oil jacket pipe end by upsetting, comprising the following steps:

[0021] Step one, heating: placing the oil jacket pipe in the corresponding fixed station and heating the end of the oil jacket pipe through the heating mechanism;

[0022] Step two, cleaning: transmitting the oil jacket pipe in the corresponding fixed station to the next fixed station through the pushing tube mechanism, in the process, the cleaning mechanism is triggered to remove the oxide scale on the end of the oil jacket pipe;

[0023] Step three, upsetting: fixing the oil jacket pipe through the fixing mechanism and operating the first hydraulic telescopic cylinder to upset the end of the oil jacket pipe through the inner mold;

[0024] Step four, according to the required upsetting times of the oil jacket pipe, the steps one to three are cycled;

[0025] Step five, discharging: discharging the oil jacket pipe from the fixing mechanism after the upsetting is completed.

[0026] Compared with the prior art, the application has the following beneficial effects:

[0027] 1. The application realizes continuous operation of oil casing end upset forging through multi-station linear distribution design and automatic transmission of the pushing tube mechanism, significantly shortens the production cycle (efficiency is expected to increase by more than 30%), and automatic transmission also reduces manual intervention and reduces production capacity loss caused by operation delay, especially suitable for mass production requirements;

[0028] 2. The cleaning mechanism in the application can automatically clean the oxide scale and impurities on the oil casing to ensure the production quality of the oil casing upset forging, and the cleaning mechanism is driven to operate by the force generated by the oil casing rolling of the cleaning mechanism and the characteristics of the liquid crystal elastic strip, without the need to set up an additional power source, and the low-consumption design can significantly reduce production costs;

[0029] 3. The cleaning mechanism in the application has two different cleaning methods, namely the impact force of the first roller and the high-pressure airflow sprayed from the air hole, which improves the effect of cleaning the oxide scale and impurities. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a top view plane structure schematic diagram of the application;

[0031] Figure 2 is a local three-dimensional structure schematic diagram of the application;

[0032] Figure 3 is a side view plane structure schematic diagram of the application;

[0033] Figure 4 is a local three-dimensional structure schematic diagram of the pushing tube mechanism in the application;

[0034] Figure 5 is a side view plane structure schematic diagram of the pushing tube mechanism in the application;

[0035] Figure 6 is a three-dimensional structure schematic diagram of the cleaning mechanism in the application.

[0036] Figures in the drawings represent:

[0037] 11-Supporting mold; 111-First inclined surface; 112-First arc-shaped groove; 12-Second hydraulic telescopic cylinder; 13-Extrusion mold; 131-Second inclined surface; 132-Second arc-shaped groove; 2-Pushing tube mechanism; 21-Third hydraulic telescopic cylinder; 22-Horizontal frame; 23-Horizontal baffle; 24-Round shaft; 25-First support plate; 26-Second support plate; 27-Rubber pad; 28-Torsion spring; 29-Snap fastener; 291-Pin part; 292-First... 2-Roller; 210-Slot; 211-Tension Spring; 3-Cleaning Mechanism; 31-Fixing Frame; 32-Horizontal Optical Axis; 33-Cross Air Tube; 34-Air Hole; 35-First Roller; 36-First Spring; 371-Vertical Cylinder; 372-Limiting Block; 373-Pull Rope; 374-LCD Elastic Strip; 375-Groove; 38-Moving Plate; 41-Induction Heating Equipment; 42-Fourth Hydraulic Telescopic Cylinder; 5-First Hydraulic Telescopic Cylinder; 100-Oil Casing. Detailed Implementation

[0038] The above-mentioned and other technical features and advantages of the present invention will be described in more detail below with reference to the accompanying drawings.

[0039] This embodiment provides a technical solution: an upsetting and forming device for the end of an oil casing pipe, such as... Figures 1 to 6 As shown, it includes a fixing mechanism, at least two heating mechanisms, at least two first hydraulic telescopic cylinders 5, a pipe pushing mechanism 2, and at least two cleaning mechanisms 3. The oil casing 100 is transported to the fixing mechanism via an upstream conveyor belt, or the oil casing 100 can be placed on the fixing mechanism by a robotic arm.

[0040] The fixing mechanism has multiple fixed stations for storing the oil casing 100, and the multiple fixed stations are linearly distributed. The fixing mechanism includes at least two linearly distributed support molds 11 and clamping components. The upper surface of the support mold 11 is provided with multiple first arc grooves 112. The inner diameter of the first arc groove 112 is adapted to the outer diameter of the oil casing 100, that is, the position of the first arc groove 112 is a fixed station. The upper surface of the support mold 11 has multiple first inclined surfaces 111. The length of the first inclined surface 111 is set as needed. The feeding direction of the oil casing 100 is the high end of the first inclined surface 111. When the oil casing 100 in the first arc groove 112 is lifted by the pusher mechanism 2, the oil casing 100 will roll along the first inclined surface 111 due to the influence of gravity, realizing the transmission of the oil casing 100, so that the oil casing 100 enters the next first arc groove 112 or is discharged from the support mold 11.

[0041] The pressing assembly is used for fixing the oil jacket pipe 100 in cooperation with the supporting mold 11; the pressing assembly comprises a second hydraulic telescopic cylinder 12 fixed by a support, it is necessary to note that the support needs to avoid interference with the transmission path of the oil jacket pipe 100, the telescopic end of the second hydraulic telescopic cylinder 12 is fixed with an extrusion mold 13, a plurality of second arc-shaped grooves 132 are arranged on the lower surface of the extrusion mold 13, the lower surface of the extrusion mold 13 has a plurality of second inclined surfaces 131, the first arc-shaped groove 112 is matched with the second arc-shaped groove 132, and the first inclined surface 111 is matched with the second inclined surface 131; when the second hydraulic telescopic cylinder 12 drives the extrusion mold 13 to move downwards, the extrusion mold 13 is attached to the supporting mold 11, so as to press and fix the oil jacket pipe 100.

[0042] A plurality of heating mechanisms are arranged at intervals with the plurality of first hydraulic telescopic cylinders 5 and correspond to the end portions of the oil jacket pipes 100 on the plurality of fixing stations respectively, the telescopic end of the first hydraulic telescopic cylinder 5 has an inner mold; in operation, the heating mechanism heats the oil jacket pipe 100, and then the telescopic end of the first hydraulic telescopic cylinder 5 is extended to drive the inner mold to insert into the inside of the oil jacket pipe 100, so as to realize the expansion of the outer diameter of the oil jacket pipe 100 and realize the upsetting, if multiple upsetting is needed, the heating and the expansion of the outer diameter of the oil jacket pipe 100 are repeated, so as to ensure the quality of the upsetting of the oil jacket pipe.

[0043] The heating mechanism comprises an induction heating device 41 slidably installed on the ground through a sliding rail block structure and a fourth hydraulic telescopic cylinder 42 installed on the ground, the telescopic end of the fourth hydraulic telescopic cylinder 42 is connected with the induction heating device 41, and the induction coil of the induction heating device 41 axially corresponds to the oil jacket pipe 100, that is, in operation, the telescopic end of the fourth hydraulic telescopic cylinder 42 is extended to drive the induction heating device 41 to move towards the corresponding oil jacket pipe 100, until the induction coil of the induction heating device 41 wraps the end portion of the oil jacket pipe 100, and then the induction heating device 41 can be operated to heat the end portion of the oil jacket pipe 100.

[0044] It is necessary to note that the induction heating device 41 and the first hydraulic telescopic cylinder 5 can be selected from existing models, and how to select the induction heating device 41 and the first hydraulic telescopic cylinder 5 and realize the use effect thereof is existing technology for the person skilled in the art, which will not be described in detail herein.

[0045] The pushing pipe mechanism 2 is arranged parallel to the fixing mechanism and between the two support molds 11 of the fixing mechanism, and is used for sequentially transferring the oil jacket pipe 100 at multiple fixing stations to realize automatic transmission; the pushing pipe mechanism 2 comprises a third hydraulic telescopic cylinder 21 fixed through a mounting seat, the number of the third hydraulic telescopic cylinder 21 is preferably two, the two third hydraulic telescopic cylinders 21 are respectively located at two ends of the oil jacket pipe 100, and a transverse frame 22 is fixed to the telescopic end of the third hydraulic telescopic cylinder 21, a plurality of lifting assemblies are arranged on the transverse frame 22, and the plurality of lifting assemblies are vertically corresponding to the plurality of oil jacket pipes 100 respectively, that is, each lifting assembly is located directly below each oil jacket pipe 100.

[0046] The lifting assembly comprises a circular shaft 24 fixed to the transverse frame 22, a first supporting plate 25 is fixed to one side of the circular shaft 24, and a second supporting plate 26 is rotatably installed on the other side through a torsional spring 28, specifically, the second supporting plate 26 is fixed with a rotating ring rotatably installed on the circular shaft 24, and the rotating ring is installed in cooperation with the torsional spring 28 to realize driving the second supporting plate 26 to overturn, the second supporting plate 26 is located on the low end side close to the first inclined surface 111, and the second supporting plate 26 is limited and fixed through an angle limiting piece, when the angle of the second supporting plate 26 is limited and fixed through the angle limiting piece, the first supporting plate 25 and the second supporting plate 26 are symmetrically centered on the circular shaft 24, the first supporting plate 25 and the second supporting plate 26 can support the oil jacket pipe 100, and rubber pads 27 are arranged on the upper surfaces of the first supporting plate 25 and the second supporting plate 26, and the arrangement of the rubber pads 27 can reduce the impact force of the oil jacket pipe 100 entering the first arc-shaped groove 112.

[0047] The angle limiting piece comprises a buckle 29 slidably arranged on the lower surface of the second supporting plate 26 through a U-shaped enclosing plate and a slot 210 opened in the circular shaft 24, when the second supporting plate 26 is limited and fixed by the angle limiting piece, the second supporting plate 26 and the slot 210 are located on the same straight line at this time, the lower end of the buckle 29 is in the shape of a hook, that is, a plug portion 291, the plug portion 291 is inserted into the slot 210, a tension spring 211 is installed between the U-shaped enclosing plate and the buckle 29, the tension spring 211 gives the buckle 29 a pulling force along the width direction of the second supporting plate 26, and the direction of the pulling force is the inclination direction of the second supporting plate 26; the upper end of the buckle 29 has a horizontal baffle plate 23 fixed to the side wall of the support mold 11, and a second roller 292 is installed on the upper end of the buckle 29.

[0048] When the oil casing 100 on the fixed station needs to be transported to the next fixed station or discharged, the telescopic end of the third hydraulic telescopic cylinder 21 is extended, the lifting assembly will push the oil casing 100 upwards, at this time the second roller 292 will be in contact with the cross barrier plate 23, the buckle 29 will be pushed to move downwards until the pin part 291 is separated from the slot 210, and the tension spring 211 is stored, with the continuous rising of the lifting assembly, the second support plate 26 and the buckle 29 will be blocked by the cross barrier plate 23 and overturned with the round shaft 24, the torsional spring 28 will be deformed and stored, and finally the oil casing 100 will roll downwards along the second support plate 26 and the first inclined surface 111 due to the action of gravity. Subsequently, the telescopic end of the third hydraulic telescopic cylinder 21 is retracted until the second roller 292 is no longer in contact with the cross barrier plate 23, the second support plate 26 will return to the original angle due to the elastic force of the torsional spring 28, and the pin part 291 will enter the slot 210 due to the pulling force of the tension spring 211, limiting the angle of the second support plate 26 and keeping the lifting assembly at a certain height. When the oil casing 100 rolls into the first arc-shaped groove 112, the rubber pads 27 on the first support plate 25 and the second support plate 26 will bear the oil casing 100, and then the telescopic end of the third hydraulic telescopic cylinder 21 is retracted, so that the oil casing 100 can be smoothly placed into the fixed station.

[0049] Due to the setting of the angle limiting part, the lifting assembly has two states of transition to achieve different effects: 1. When the second support plate 26 is limited to be overturned, the oil casing 100 can be lifted and discharged from the fixed station to the next process; 2. When the second support plate 26 is limited to be not overturned, the oil casing 100 can be buffered when it enters the fixed station, so that the oil casing 100 can be smoothly placed into the fixed station.

[0050] After the end of the oil casing 100 is heated, the heated position of the oil casing 100 will produce scale or other impurities, which will affect the quality of the upsetting of the oil casing 100. Therefore, a cleaning mechanism 3 is arranged between the heating mechanism and the first hydraulic telescopic cylinder 5, which is used to remove the scale on the surface of the oil casing 100 after heating to improve the quality of the upsetting of the oil casing 100.

[0051] The cleaning mechanism 3 comprises a fixed frame 31 which can be installed on the support frame fixing the second hydraulic telescopic cylinder 12, a moving plate 38 is transversely slidingly installed on the fixed frame 31, the fixed frame 31 has a transverse light shaft 32, the moving plate 38 is slidingly installed on the transverse light shaft 32 through a linear bearing, a first spring 36 is installed on the fixed frame 31, the first spring 36 gives the moving plate 38 a force to move to the high end side of the first inclined surface 111, a first roller 35 and a cross air pipe 33 are installed on the side of the moving plate 38 close to the oil jacket pipe 100, and the cross air pipe 33 is connected with an external air pump through an air pipe, how the cross air pipe 33 is connected with the air pump and how to achieve the use effect thereof are both prior art for the person skilled in the art, and will not be described in detail herein; each end of the cross air pipe 33 has two air holes 34, and the two air holes 34 are obliquely arranged so that the high-pressure air flow sprayed therefrom is respectively directed to the inner and outer walls of the oil jacket pipe 100, and the blowing time is 1-2 seconds, which ensures that the impurities on the inner and outer walls of the end of the oil jacket pipe 100 can be cleaned, and at the same time, the temperature of the oil jacket pipe 100 will not be affected, the air holes 34 can also be replaced by high-pressure nozzles, and a plurality of air holes 34 can also be arranged.

[0052] It should be noted that: since the first inclined surface 111 is obliquely arranged, when the oil jacket pipe 100 rolls along the first inclined surface 111, the height of the oil jacket pipe 100 will gradually decrease with the rolling, and during the rolling of the oil jacket pipe 100, the two air holes 34 at each end need to be respectively maintained on the inner and outer sides of the oil jacket pipe 100 at all times, so the gap between the two air holes 34 needs to be designed accordingly.

[0053] When the oil jacket pipe 100 rolls along the first inclined surface 111, initially, the upper half of the oil jacket pipe 100 will be in contact with the first roller 35, and as the oil jacket pipe 100 rolls, the moving plate 38 will be driven to slide along the transverse light shaft 32, and the first spring 36 will be compressed, during which the air pump is operated to make the air holes 34 spray high-pressure air flow, and as the oil jacket pipe 100 rolls, the high-pressure air flow will impact the inner and outer walls of the oil jacket pipe 100 to separate the oxide scale and impurities from the area to be upset of the oil jacket pipe 100, and the cleaning is completed; finally, until the oil jacket pipe 100 drops to no longer contact the first roller 35, the moving plate 38 will return to the initial position due to the elastic force of the first spring 36, and is ready for the next operation.

[0054] Further, a quick reset assembly can be arranged on the fixed frame 31 for locking and quickly resetting the moving plate 38. The quick reset assembly comprises a vertical cylinder 371 fixed to the fixed frame 31 and located near the low end of the first inclined surface 111. A limiting block 372 is slidably arranged in the vertical cylinder 371. The lower end of the limiting block 372 extends out of the vertical cylinder 371 and has an inclined surface arranged near one end of the moving plate 38. A second spring (not shown in the figure) is arranged in the vertical cylinder 371 for pushing the limiting block 372 downward. A groove 375 corresponding to the limiting block 372 is arranged on the moving plate 38.

[0055] When the moving plate 38 slides to one side of the limiting block 372, the moving plate 38 pushes the limiting block 372 upward and compresses the second spring. When the limiting block 372 corresponds to the groove 375, the limiting block 372 will enter the groove 375 due to the force of the second spring, thereby limiting the resetting of the moving plate 38 when the first roller 35 is separated from the oil jacket pipe 100.

[0056] A liquid crystal elastic strip 374 is arranged on the fixed frame 31 and located near the high end of the first inclined surface 111. Therefore, when the oil jacket pipe 100 just enters the first inclined surface 111, the liquid crystal elastic strip 374 will be heated by the temperature of the oil jacket pipe 100. The end of the fixed frame 31 is connected with a pull rope 373, and the end of the pull rope 373 away from the liquid crystal elastic strip 374 is connected with the upper end of the limiting block 372.

[0057] The liquid crystal elastic strip 374 is made of liquid crystal elastomer material. The liquid crystal elastomer is a special polymer material which combines the ordered molecular arrangement characteristics of liquid crystal and the flexibility of elastomer. This material has ordered structure of liquid crystal phase at the molecular level and reversible deformation ability of elastomer at the macro level. The liquid crystal elastomer shows negative thermal expansion coefficient, i.e. the volume decreases with the increase of temperature.

[0058] When the oil casing 100 is pushed out of the first arc-shaped groove 112 by the pushing tube mechanism 2, the oil casing 100 will move to the first inclined surface 111, at this time, the oil casing 100 is close to the liquid crystal elastic strip 374, the liquid crystal elastic strip 374 is affected by the temperature of the oil casing 100 to produce shrinkage, that is, the limiting block 372 is pulled upward in the vertical cylinder 371 by the pull rope 373, the lower end of the limiting block 372 is out of the groove 375, the limiting of the moving plate 38 is released, and the moving plate 38 is reset under the action of the first spring 36, so that the first roller 35 hits the oil casing 100, under the action of the impact, the oxide skin on the oil casing 100 can be vibrated and loosened or fallen off, and the effect of cleaning the oxide skin is improved; when the oil casing 100 rolls away from the liquid crystal elastic strip 374, the temperature sensed by the liquid crystal elastic strip 374 decreases, and the length of the liquid crystal elastic strip 374 will be extended, at this time, the limiting block 372 will be downwardly displaced under the action of the second spring, the automatic reset of the limiting block 372 is completed, the limiting block 372 will enter the groove 375 to limit the moving plate 38, and the operation closed loop is completed, preparing for the next operation.

[0059] Of course, in some embodiments, the structure of the liquid crystal elastic strip 374 and the pull rope 373 can also be realized by a telescopic actuator connected with the limiting block 372 to push the limiting block 372 to move up and down in the vertical cylinder 371 to achieve the purpose of inserting or disengaging from the groove 375, and the telescopic actuator can be realized by a pneumatic cylinder or a hydraulic cylinder, and can be controlled by a controller.

[0060] It should be noted that the weight of the oil casing 100 is generally 15-30 kg, and the resistance of the first spring 36 will not prevent the rolling of the oil casing 100, and the position of the first roller 35 in each cleaning mechanism 3 is set according to needs; the second hydraulic telescopic cylinder 12, the third hydraulic telescopic cylinder 21, the first hydraulic telescopic cylinder 5 and the fourth hydraulic telescopic cylinder 42 are connected with an external hydraulic system to ensure smooth operation, and how to connect and achieve the use effect is known to those skilled in the art and will not be described in detail herein.

[0061] A method for forming an oil casing end by upsetting, comprising the following steps:

[0062] Step one, heating: placing the oil casing 100 in the corresponding fixed station, and heating the end of the oil casing 100 by the heating mechanism;

[0063] Step two, cleaning: transmitting the oil casing 100 in the corresponding fixed station to the next fixed station by the pushing tube mechanism 2, in the process, the cleaning mechanism 3 will be triggered to remove the oxide skin on the end of the oil casing 100 by the cleaning mechanism 3;

[0064] Step three, upsetting: the oil casing 100 is fixed by the fixing mechanism, and the first hydraulic telescopic cylinder 5 is operated to upset the end of the oil casing 100 by the inner die;

[0065] Step four, according to the upsetting times required by the oil casing 100, the steps one to three are cycled;

[0066] Step five, discharging: after the upsetting of the oil casing 100 is completed, it is discharged from the fixing mechanism.

[0067] The above description is only the preferred embodiment of the present application, which is only illustrative but not restrictive. It is understood by those skilled in the art that many changes, modifications and even equivalents can be made to the present application within the spirit and scope defined by the claims of the present application, but all will fall within the protection scope of the present application.

Claims

1. A device for upset forming of a casing or tubing end, characterized in that The utility model relates to a kind of oil jacket tube automatic transmission device, including: Fixing mechanism, the fixing mechanism has multiple fixed stations of depositing oil jacket tube (100), and multiple The fixed station is linearly distributed; At least two heating mechanisms and at least two first hydraulic telescopic cylinders (5), multiple The heating mechanism and multiple first hydraulic telescopic cylinder (5) are one-to-one interval arrangement, and with multiple The end part of oil jacket tube (100) on the fixed station is respectively corresponding, the telescopic end of first hydraulic telescopic cylinder (5) has inner mold; Push tube mechanism (2), the push tube mechanism (2) is parallelly arranged with fixed mechanism, it is used to sequentially transfer oil jacket tube (100) on multiple fixed stations, realize automatic transmission; At least two cleaning mechanisms (3), the cleaning mechanism (3) is arranged between heating mechanism and first hydraulic telescopic cylinder (5), it is used to remove the surface scale of the oil jacket tube (100) that heating is completed; The fixing mechanism includes at least two linearly distributed support molds (11) and pressing assemblies, the upper surface of the support mold (11) is provided with multiple first arc grooves (112), the upper surface of the support mold (11) has multiple first inclined surfaces (111), the incoming direction of the oil jacket tube (100) is the high end of the first inclined surface (111), and the oil jacket tube (100) rolls along the first inclined surface (111), realizes the transmission of the oil jacket tube (100), and the pressing assembly is used to be fixed with the support mold (11) Oil jacket tube (100) is fixed; The pressing assembly includes second hydraulic telescopic cylinder (12) fixed by support, the telescopic end of second hydraulic telescopic cylinder (12) is fixed with extrusion mold (13), the lower surface of extrusion mold (13) is provided with multiple second arc grooves (132), and the lower surface of extrusion mold (13) has multiple second inclined surfaces (131); The cleaning mechanism (3) includes fixed frame (31), the moving plate (38) is transversely slidably installed on the fixed frame (31), the first spring (36) is installed on the fixed frame (31), the first spring (36) gives the moving plate (38) the action force that moves to the high end of the first inclined surface (111) side, the first roller (35) and cross air pipe (33) are installed on the side close to the oil jacket tube (100) of the moving plate (38), and the cross air pipe (33) is connected with external air pump through air pipe, each end of the cross air pipe (33) has two air holes (34), and the high-pressure airflow emitted by two The air hole (34) is respectively directed to the inner and outer wall of oil jacket tube (100); The push tube mechanism (2) includes third hydraulic telescopic cylinder (21) fixed by mounting seat, the telescopic end of third hydraulic telescopic cylinder (21) is fixed with horizontal frame (22), multiple lifting assemblies are provided on the horizontal frame (22), and multiple The lifting assembly and multiple oil jacket tube (100) are respectively vertically corresponding. The lifting assembly comprises a round shaft (24) fixed to the transverse frame (22), one side of the round shaft (24) is fixed with a first supporting plate (25), the other side is rotatably provided with a second supporting plate (26) through a torsion spring (28), the second supporting plate (26) is close to the low end side of the first inclined surface (111), the second supporting plate (26) is limited and fixed through an angle limiting piece, and the first supporting plate (25) and the second supporting plate (26) are centrally symmetric about the round shaft (24), the upper surfaces of the first supporting plate (25) and the second supporting plate (26) are both provided with rubber pads (27) through bonding. The angle limiting piece comprises a buckle (29) provided on the lower surface of the second supporting plate (26) through a U-shaped fence and a slot (210) provided on the round shaft (24), the lower end of the buckle (29) is in the form of a hook, that is, a latch portion (291), the latch portion (291) is inserted into the slot (210), a tension spring (211) is arranged between the U-shaped fence and the buckle (29), the tension spring (211) gives the buckle (29) a pulling force along the width direction of the second supporting plate (26), and the upper end of the buckle (29) is provided with a horizontal baffle plate (23) fixed to the side wall of the supporting mold (11).

2. The oil casing end-up forming device as recited in claim 1, wherein A quick reset assembly is arranged on the fixing frame (31), the quick reset assembly comprises a vertical cylinder (371) fixed to the fixing frame (31), the vertical cylinder (371) is located close to the low end side of the first inclined surface (111), a limiting block (372) is slidably arranged in the vertical cylinder (371), the lower end of the limiting block (372) extends out of the vertical cylinder (371) and is provided with an inclined surface, a second spring is arranged in the vertical cylinder (371) and used for pushing the limiting block (372) to move downward, and a recess (375) corresponding to the limiting block (372) is arranged on the moving plate (38). A liquid crystal elastic strip (374) is arranged on the fixing frame (31), the liquid crystal elastic strip (374) is located close to the high end side of the first inclined surface (111), the end of the fixing frame (31) is connected with a pull rope (373), the end, away from the liquid crystal elastic strip (374), of the pull rope (373) is connected with the upper end of the limiting block (372), and when the liquid crystal elastic strip (374) is deformed due to heat, the limiting block (372) is pulled to move upward.

3. The oil casing end-up forming device as recited in claim 1, wherein The upper end of the buckle (29) is provided with a second roller (292).

4. The coupling-end upset forming apparatus as recited in claim 1, wherein The heating mechanism comprises an induction heating device (41) slidably arranged on the ground through a sliding rail sliding block structure and a fourth hydraulic telescopic cylinder (42) arranged on the ground, the telescopic end of the fourth hydraulic telescopic cylinder (42) is connected with the induction heating device (41), and the induction coil of the induction heating device (41) is axially corresponding to the oil jacket pipe (100).

5. A method of using the oil well casing end upset forming device as claimed in claim 1, characterized by, The method comprises the following steps: Step one, heating: the oil jacket pipe (100) is placed in the corresponding fixed station, and the end of the oil jacket pipe (100) is heated through the heating mechanism. Step two, cleaning: the oil sleeve (100) on the corresponding fixed station is transmitted to the next fixed station by the push tube mechanism (2), and in the process, the cleaning mechanism (3) is triggered to remove the oxide scale on the end of the oil sleeve (100) by the cleaning mechanism (3); Step three, upsetting: the oil sleeve (100) is fixed by the fixing mechanism, and the first hydraulic telescopic cylinder (5) is operated to upset the end of the oil sleeve (100) by the inner mold; Step four, according to the required upsetting times of the oil sleeve (100), steps one to three are cycled; Step five, discharge: after the upsetting of the oil sleeve (100) is completed, it is discharged from the fixing mechanism.

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