Oil casing pipe end upsetting forming device and method

Abstract

The invention discloses an oil casing end upsetting forming device and method, and relates to the technical field of upsetting, the oil casing end upsetting forming device comprises a fixing mechanism, a plurality of upsetting mechanisms, a plurality of upsetting mechanisms and a plurality of upsetting mechanisms, 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 multiple heating mechanisms and the multiple first hydraulic telescopic cylinders are arranged at intervals in a one-to-one mode and correspond to the ends of the oil sleeves on the multiple fixing stations respectively, and the telescopic ends of the first hydraulic telescopic cylinders are provided with inner molds; and the pipe pushing mechanism and the fixing mechanism are arranged in parallel, and the pipe pushing mechanism is used for sequentially transferring the oil casing pipes on the multiple fixing stations, so that automatic conveying is achieved. Through the multi-station linear distribution design and automatic transmission of the pipe pushing mechanism, continuous operation of upsetting of the end of the oil sleeve is achieved, the production period is remarkably shortened, manual intervention is reduced through automatic transmission, and productivity loss caused by operation delay is reduced.

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: A fixing mechanism having multiple fixing stations for storing oil casing pipes, and the multiple fixing stations being linearly distributed; 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. 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. 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.

[0006] Preferably, the fixing mechanism includes at least two linearly distributed support molds and a clamping assembly. The upper surface of the support mold has multiple first arc-shaped grooves and multiple first inclined surfaces. The material feeding direction of the oil casing is the high end of the first inclined surface. The oil casing rolls along the first inclined surface to realize the transmission of the oil casing. The clamping assembly is used to cooperate with the support mold to fix the oil casing.

[0007] Preferably, the pressing assembly includes a second hydraulic telescopic cylinder fixed by a bracket, 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 has a plurality of second inclined surfaces.

[0008] Preferably, the cleaning mechanism includes a fixed frame, on which a movable plate is slidably mounted laterally. A first spring is mounted on the fixed frame, and the first spring exerts a force on the movable plate to move towards the high end of the first inclined surface. A first roller and a cross-shaped air pipe are mounted on the side of the movable plate near the oil casing. The cross-shaped air pipe is connected to an external air pump through an air pipe. Each end of the cross-shaped air pipe has two air holes, and the high-pressure airflow ejected from the two air holes is directed towards the inner and outer walls of the oil casing, respectively.

[0009] Preferably, the fixing frame is provided with a quick reset assembly, the quick reset assembly includes a vertical cylinder fixed to the fixing frame, and the vertical cylinder is located on the lower end side near the first inclined surface. A limiting block is slidably disposed inside the vertical cylinder. The lower end of the limiting block extends out of the vertical cylinder and has an inclined surface. A second spring is provided inside the vertical cylinder to push the limiting block to move downward. A groove corresponding to the limiting block is opened on the moving plate. A liquid crystal elastic strip is installed on the fixing frame. The liquid crystal elastic strip is located on the high end side near the first inclined surface. A pull rope is connected to the end of the fixing frame. The end of the pull rope away from the liquid crystal elastic strip is connected to the upper end of the limiting block, so that when the liquid crystal elastic strip is heated and deformed, it pulls the limiting block to move upward.

[0010] Preferably, the pushing mechanism includes a third hydraulic telescopic cylinder fixed by a mounting base, the telescopic end of the third hydraulic telescopic cylinder is fixed with a transverse frame, and multiple lifting components are provided on the transverse frame, with the multiple lifting components corresponding vertically to multiple oil casings respectively; The lifting assembly includes a circular shaft fixed to a horizontal frame. A first support plate is fixed to one side of the circular shaft, and a second support plate is rotatably installed on the other side via a torsion spring. The second support plate is located on the lower side near the first inclined surface. The second support plate is fixed by an angle limiting member, and the first support plate and the second support plate are symmetrical about the circular shaft center. Rubber pads are bonded to the upper surfaces of both the first support plate and the second support plate.

[0011] Preferably, the angle limiting component includes a buckle that is slidably disposed on the lower surface of the second support plate via a U-shaped surrounding plate and a slot formed on a round shaft. The lower end of the buckle is hook-shaped, which is a pin portion. The pin portion is inserted into the slot. A tension spring is installed between the U-shaped surrounding plate and the buckle. The tension spring provides tension to the buckle along the width direction of the second support plate. The upper end of the buckle has a horizontal baffle that is fixed to the side wall of the supporting mold.

[0012] Preferably, a second roller is installed at the upper end of the buckle.

[0013] Preferably, the heating mechanism includes an induction heating device slidably mounted on the ground via a slide rail slider structure and a fourth hydraulic telescopic cylinder mounted on the ground. The telescopic end of the fourth hydraulic telescopic cylinder is connected to the induction heating device, and the induction coil of the induction heating device is axially aligned with the oil casing.

[0014] The present invention also proposes a method using an upsetting forming device for the end of an oil casing, comprising the following steps: Step 1, Heating: Place the oil casing in the corresponding fixed position and heat the end of the oil casing using the heating mechanism; Step 2, Cleaning: The oil casing at the corresponding fixed station is transferred to the next fixed station by the pipe pushing mechanism. During this process, the cleaning mechanism will be triggered to remove the oxide scale from the end of the oil casing. Step 3, Upsetting: The oil casing is fixed by the fixing mechanism, and the first hydraulic telescopic cylinder is operated to upset the end of the oil casing through the inner die; Step 4: Based on the required number of upsetting operations for the oil casing, repeat steps 1 to 3. Step 5, Discharge: After completing the upsetting of the oil casing, discharge it from the fixed mechanism.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This application achieves continuous operation of upsetting at the end of oil casing through multi-station linear distribution design and automatic transmission of the pusher mechanism, which significantly shortens the production cycle (the efficiency is expected to increase by more than 30%). The automated transmission also reduces manual intervention and reduces the production capacity loss caused by operation delays, which is especially suitable for mass production needs. 2. The cleaning mechanism in this application can automatically clean the oxide scale and debris on the oil casing to ensure the production quality of the oil casing upsetting. The cleaning mechanism is driven by the force generated by the rolling of the oil casing and the characteristics of the liquid crystal elastic strip itself, without the need for an additional power source. The low-consumption design can significantly reduce production costs. 3. The cleaning mechanism in this application has two different cleaning methods, namely, the impact force of the first roller and the high-pressure airflow ejected from the air hole, which improves the effect of cleaning oxide scale and debris. Attached Figure Description

[0016] Figure 1 This is a top view schematic diagram of the structure of the present invention; Figure 2 This is a partial three-dimensional structural diagram of the present invention; Figure 3 This is a side view schematic diagram of the structure of the present invention; Figure 4 This is a partial three-dimensional structural diagram of the tube-pushing mechanism in this invention; Figure 5 This is a side view of the push tube mechanism in this invention. Figure 6 This is a three-dimensional structural diagram of the cleaning mechanism in this invention.

[0017] The numbers in the image represent: 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

[0018] 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.

[0019] 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.

[0020] 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.

[0021] The clamping assembly is used to cooperate with the support mold 11 to fix the oil casing 100. The clamping assembly includes a second hydraulic telescopic cylinder 12 fixed by a bracket. It should be noted that the bracket should avoid interfering with the transmission path of the oil casing 100. The telescopic end of the second hydraulic telescopic cylinder 12 is fixed with a pressing mold 13. The lower surface of the pressing mold 13 has multiple second arc-shaped grooves 132 and multiple second inclined surfaces 131. The first arc-shaped groove 112 is adapted to the second arc-shaped groove 132, and the first inclined surface 111 is adapted to the second inclined surface 131. When the second hydraulic telescopic cylinder 12 drives the pressing mold 13 to move downward, the pressing mold 13 fits against the support mold 11 to clamp and fix the oil casing 100.

[0022] Multiple heating mechanisms are spaced apart from multiple first hydraulic telescopic cylinders 5, and correspond to the ends of the oil casing 100 at multiple fixed workstations. The telescopic end of the first hydraulic telescopic cylinder 5 has an inner mold. During operation, the heating mechanism heats the oil casing 100, and then by extending the telescopic end of the first hydraulic telescopic cylinder 5, the inner mold is driven to insert into the interior of the oil casing 100 to expand the outer diameter of the oil casing 100 for upsetting. If multiple upsettings are required, the oil casing 100 is repeatedly heated and its outer diameter is expanded to ensure the quality of the oil casing upsetting.

[0023] The heating mechanism includes an induction heating device 41 that is slidably mounted on the ground via a slide rail slider structure and a fourth hydraulic telescopic cylinder 42 mounted on the ground. The telescopic end of the fourth hydraulic telescopic cylinder 42 is connected to the induction heating device 41. The induction coil of the induction heating device 41 is axially aligned with the oil casing 100. That is, during operation, the induction heating device 41 is driven to move towards the corresponding oil casing 100 by extending the telescopic end of the fourth hydraulic telescopic cylinder 42 until the induction coil of the induction heating device 41 covers the end of the oil casing 100. Then, the induction heating device 41 can be operated to heat the end of the oil casing 100.

[0024] It should be noted that both the induction heating device 41 and the first hydraulic telescopic cylinder 5 can be selected from existing compatible models. The specific selection of the induction heating device 41 and the first hydraulic telescopic cylinder 5 and the achievement of their usage effects are existing technologies for those skilled in the art, and will not be described in detail in this article.

[0025] The pushing mechanism 2 is arranged in parallel with the fixing mechanism and is located between the two support molds 11 of the fixing mechanism. It is used to transfer the oil casing 100 sequentially at multiple fixed stations to achieve automatic transmission. The pushing mechanism 2 includes a third hydraulic telescopic cylinder 21 fixed by a mounting base. Preferably, there are two third hydraulic telescopic cylinders 21, which are located at both ends of the oil casing 100. The telescopic ends of the third hydraulic telescopic cylinders 21 are fixed with a transverse frame 22. Multiple lifting components are arranged on the transverse frame 22. The multiple lifting components are vertically corresponding to the multiple oil casings 100, so that each lifting component is located directly below each oil casing 100.

[0026] The lifting assembly includes a round shaft 24 fixed to the transverse frame 22. A first support plate 25 is fixed to one side of the round shaft 24, and a second support plate 26 is rotatably mounted on the other side via a torsion spring 28. Specifically, a rotating ring is fixed to the second support plate 26 and rotatably mounted on the round shaft 24. The rotating ring cooperates with the torsion spring 28 to drive the second support plate 26 to flip. The second support plate 26 is located at the lower end near the first inclined surface 111. The second support plate 26 is limited and fixed by an angle limiting member. When the angle of the second support plate 26 is limited and fixed by the angle limiting member, the first support plate 25 and the second support plate 26 are symmetrical about the center of the round shaft 24. The first support plate 25 and the second support plate 26 can support the oil casing 100. Rubber pads 27 are bonded to the upper surfaces of the first support plate 25 and the second support plate 26. The rubber pads 27 can reduce the impact force when the oil casing 100 enters the first arc groove 112.

[0027] The angle limiting component includes a buckle 29 that is slidably disposed on the lower surface of the second support plate 26 via a U-shaped surrounding plate and a slot 210 opened on the round shaft 24. When the second support plate 26 is restricted and fixed by the angle limiting component, the second support plate 26 and the slot 210 are located on the same straight line. The lower end of the buckle 29 is hook-shaped, which is the pin part 291. The pin part 291 is inserted into the slot 210. A tension spring 211 is installed between the U-shaped surrounding plate and the buckle 29. The tension spring 211 provides the buckle 29 with a tension force along the width direction of the second support plate 26. The direction of the tension force is the inclination direction of the second support plate 26. The upper end of the buckle 29 has a horizontal baffle 23 fixed to the side wall of the support mold 11. A second roller 292 is installed on the upper end of the buckle 29.

[0028] When it is necessary to transfer the oil casing 100 at the fixed station to the next fixed station or discharge it, the extension end of the third hydraulic telescopic cylinder 21 is extended, and the lifting assembly will push the oil casing 100 upward. At this time, the second roller 292 will contact the horizontal baffle 23, which will push the buckle 29 downward until the pin part 291 disengages from the slot 210, and the tension spring 211 stores power. As the lifting assembly continues to rise, the second support plate 26 and the buckle 29 will be blocked by the horizontal baffle 23 and flipped by the round shaft 24. The torsion spring 28 will be deformed and stored power. Finally, the oil casing 100 will roll downward along the second support plate 26 and the first inclined surface 111 due to gravity. Subsequently, the telescopic end of the third hydraulic telescopic cylinder 21 is retracted until the second roller 292 no longer contacts the horizontal baffle 23. The second support plate 26 will return to its original angle due to the elastic force of the torsion spring 28, while the pin part 291 will enter the slot 210 under 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 sleeve 100 rolls into the first arc groove 112, the rubber pads 27 on the first support plate 25 and the second support plate 26 will support the oil sleeve 100. Then, the telescopic end of the third hydraulic telescopic cylinder 21 is retracted, and the oil sleeve 100 can be smoothly placed into the fixed position.

[0029] Due to the setting of the angle limiting component, the lifting assembly has two states to achieve different effects: 1. When the second support plate 26 is restricted to being rotatable, it can lift the oil casing 100 and discharge it from the fixed position to enter the next process; 2. When the second support plate 26 is restricted to not being rotatable, it can buffer the oil casing 100 when it enters the fixed position, so that the oil casing 100 enters the fixed position smoothly.

[0030] After the end of the oil casing 100 is heated, oxide scale or other impurities will be generated at the heated position of the oil casing 100. The oxide scale or impurities will affect the quality of the upsetting of the oil casing 100. Therefore, a cleaning mechanism 3 is provided between the heating mechanism and the first hydraulic telescopic cylinder 5 to remove the oxide scale on the surface of the heated oil casing 100 in order to improve the quality of the upsetting of the oil casing 100.

[0031] The cleaning mechanism 3 includes a fixed frame 31, which can be mounted on a bracket that fixes the second hydraulic telescopic cylinder 12. A movable plate 38 is laterally slidably mounted on the fixed frame 31. The fixed frame 31 has a transverse optical axis 32. The movable plate 38 is slidably mounted on the transverse optical axis 32 via a linear bearing. A first spring 36 is mounted on the fixed frame 31. The first spring 36 provides a force to the movable plate 38 to move towards the high end of the first inclined surface 111. A first roller 35 and a cross air pipe 33 are mounted on the side of the movable plate 38 near the oil casing 100. The cross air pipe 33 is connected to the outside through an air pipe. The connection between the air pump and the cross-shaped air tube 33, and how they are connected and how they achieve their intended effect, are all existing technologies for those skilled in the art and will not be discussed in detail here. Each end of the cross-shaped air tube 33 has two air holes 34, which are inclined so that the high-pressure airflow is directed toward the inner and outer walls of the oil casing 100. The blowing time is 1-2 seconds, which ensures that impurities on the inner and outer walls of the oil casing 100 are cleaned without affecting the temperature of the oil casing 100. The air holes 34 can also be replaced by high-pressure nozzles, and multiple nozzles can be used.

[0032] It should be noted that: since the first inclined surface 111 is inclined, when the oil casing 100 rolls along the first inclined surface 111, the height of the oil casing 100 will gradually decrease as it rolls. During the rolling process of the oil casing 100, the two air holes 34 at each end must always be kept on the inner and outer sides of the oil casing 100 respectively. Therefore, the gap between the two air holes 34 needs to be designed accordingly.

[0033] When the oil casing 100 rolls along the first inclined surface 111, initially, the upper part of the oil casing 100 will contact the first roller 35. As the oil casing 100 rolls, the moving plate 38 will be driven to slide along the transverse optical axis 32 and compress the first spring 36. During this process, the air pump is operated, causing the air hole 34 to spray out high-pressure airflow. As the oil casing 100 rolls, the high-pressure airflow will impact the inner and outer walls of the oil casing 100, removing oxide scale and debris from the area of ​​the oil casing 100 to be upset, thus completing the cleaning. Finally, until the oil casing 100 descends to the point where it no longer contacts the first roller 35, the moving plate 38 will return to its initial position due to the elastic force of the first spring 36, ready for the next operation.

[0034] Furthermore, a quick reset assembly can be provided on the fixed frame 31 for locking and quickly resetting the movable plate 38. The quick reset assembly includes a vertical cylinder 371 fixed to the fixed frame 31, and the vertical cylinder 371 is located on the lower end side near the first inclined surface 111. A limiting block 372 is slidably disposed inside the vertical cylinder 371. The lower end of the limiting block 372 extends out of the vertical cylinder 371 and has an inclined surface. The inclined surface is disposed at one end near the movable plate 38. A second spring (not shown in the figure) is provided inside the vertical cylinder 371 to push the limiting block 372 downward. A groove 375 corresponding to the limiting block 372 is provided on the movable plate 38.

[0035] When the movable plate 38 slides to one side of the limiting block 372, the movable plate 38 will push the limiting block 372 upward and compress 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, so that the movable plate 38 can be reset when the first roller 35 is disengaged from the oil sleeve 100.

[0036] A liquid crystal elastic strip 374 is installed on the fixing frame 31. The liquid crystal elastic strip 374 is located on the high end side near the first inclined surface 111. Therefore, when the oil sleeve 100 just enters the first inclined surface 111, the liquid crystal elastic strip 374 will be heated by the temperature of the oil sleeve 100. A pull rope 373 is connected to the end of the fixing frame 31. The end of the pull rope 373 away from the liquid crystal elastic strip 374 is connected to the upper end of the limiting block 372.

[0037] The liquid crystal elastic strip 374 is made of liquid crystal elastomer material, a special polymer material that combines the ordered molecular arrangement characteristics of liquid crystals with the flexibility of elastomers. This material has an ordered structure of liquid crystal phases at the molecular level, while exhibiting the reversible deformation capability of elastomers on a macroscopic level. Liquid crystal elastomers exhibit a negative coefficient of thermal expansion, meaning their volume decreases as temperature increases.

[0038] When the oil sleeve 100 is pushed out of the first arc-shaped groove 112 by the pusher mechanism 2, the oil sleeve 100 will move onto the first inclined surface 111. At this time, the oil sleeve 100 approaches the liquid crystal elastic strip 374. The liquid crystal elastic strip 374 is affected by the temperature of the oil sleeve 100 and contracts. That is, the pull rope 373 pulls the limiting block 372 to move upward in the vertical cylinder 371. The lower end of the limiting block 372 disengages from the groove 375, releasing the restriction on the moving plate 38. The moving plate 38 is reset under the force of the first spring 36, so that the first roller 3 5. Impacting the oil casing 100, the oxide scale on the oil casing 100 can be vibrated, loosened, or removed, improving the effect of cleaning the oxide scale. When the oil casing 100 rolls away from the liquid crystal elastic strip 374, the temperature sensed by the liquid crystal elastic strip 374 drops, and its length will extend. At this time, the limiting block 372 will move downward under the force of the second spring, completing the automatic reset of the limiting block 372. The limiting block 372 will enter the groove 375 to restrict the moving plate 38, completing the operation closed loop and preparing for the next operation.

[0039] Of course, in some embodiments, the structure of the liquid crystal elastic strip 374 and the pull rope 373 can also be realized by controlling the telescopic actuator. The telescopic actuator is connected to 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. The telescopic actuator can be realized by a cylinder or hydraulic cylinder, etc., and can be controlled by a controller.

[0040] It should be noted that the weight of the oil casing 100 is generally between 15 and 30 kg. The resistance of the first spring 36 will not hinder the rolling of the oil casing 100. The position of the first roller 35 in each cleaning mechanism 3 is set as needed. 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 all connected to the external hydraulic system to ensure their smooth operation. The specific connection method and the effect of their use are existing technologies for those skilled in the art and will not be described in detail in this article.

[0041] A method using an upsetting and forming device for the end of an oil casing includes the following steps: Step 1, Heating: Place the oil casing 100 into the corresponding fixed position and heat the end of the oil casing 100 through the heating mechanism; Step 2, Cleaning: The oil casing 100 at the corresponding fixed station is transferred to the next fixed station by the pusher mechanism 2. During this process, the cleaning mechanism 3 will be triggered to remove the oxide scale at the end of the oil casing 100. Step 3, 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 through the inner mold; Step 4: Based on the number of upsetting operations required for the oil casing 100, repeat steps 1 to 3. Step 5, Discharge: After completing the 100-degree upsetting of the oil casing, discharge it from the fixed mechanism.

[0042] The above description is merely a preferred embodiment of the present invention and is illustrative rather than restrictive. Those skilled in the art will understand that many changes, modifications, and even equivalents can be made within the spirit and scope defined by the claims of the present invention, all of which will fall within the protection scope of the present invention.

Claims

1. A device for upsetting and forming the end of an oil casing pipe, characterized in that, include: The fixing mechanism has multiple fixing stations for storing oil casing (100), and the multiple fixing stations are linearly distributed; At least two heating mechanisms and at least two first hydraulic telescopic cylinders (5), multiple heating mechanisms and multiple first hydraulic telescopic cylinders (5) are arranged at intervals and correspond to the ends of oil sleeves (100) on multiple fixed work stations respectively, and the telescopic end of the first hydraulic telescopic cylinder (5) has an inner mold; The pipe pushing mechanism (2) is arranged in parallel with the fixing mechanism. It is used to transfer the oil casing (100) sequentially at multiple fixed positions to achieve automatic transmission. At least two cleaning mechanisms (3) are provided between the heating mechanism and the first hydraulic telescopic cylinder (5) for removing the oxide scale from the surface of the heated oil casing (100).

2. The oil casing end upsetting forming device as described in claim 1, characterized in that, The fixing mechanism includes at least two linearly distributed support molds (11) and a clamping assembly. The upper surface of the support mold (11) is provided with a plurality of first arc-shaped grooves (112). The upper surface of the support mold (11) has a plurality of first inclined surfaces (111). The material feeding direction of the oil casing (100) is the high end of the first inclined surface (111). The oil casing (100) rolls along the first inclined surface (111) to realize the transmission of the oil casing (100). The clamping assembly is used to cooperate with the support mold (11) to fix the oil casing (100).

3. The oil casing end upsetting forming device as described in claim 2, characterized in that, The pressing assembly includes a second hydraulic telescopic cylinder (12) fixed by a bracket. The telescopic end of the second hydraulic telescopic cylinder (12) is fixed with an extrusion mold (13). The lower surface of the extrusion mold (13) is provided with a plurality of second arc-shaped grooves (132) and the lower surface of the extrusion mold (13) has a plurality of second inclined surfaces (131).

4. The oil casing end upsetting forming device as described in claim 2, characterized in that, The cleaning mechanism (3) includes a fixed frame (31), on which a movable plate (38) is slidably mounted laterally. A first spring (36) is mounted on the fixed frame (31). The first spring (36) provides a force to the movable plate (38) to move towards the high end of the first inclined surface (111). A first roller (35) and a cross air pipe (33) are mounted on the side of the movable plate (38) near the oil casing (100). The cross air pipe (33) is connected to an external air pump through an air pipe. Each end of the cross air pipe (33) has two air holes (34), and the high-pressure airflow ejected from the two air holes (34) is directed toward the inner and outer walls of the oil casing (100).

5. The oil casing end upsetting forming device as described in claim 4, characterized in that, A quick reset assembly is provided on the fixed frame (31). The quick reset assembly includes a vertical cylinder (371) fixed to the fixed frame (31), and the vertical cylinder (371) is located on the lower side near the first inclined surface (111). A limiting block (372) is slidably provided inside the vertical cylinder (371). The lower end of the limiting block (372) extends out of the vertical cylinder (371) and has an inclined surface. A second spring is provided inside the vertical cylinder (371) to push the limiting block (372) to move downward. A groove (375) corresponding to the limiting block (372) is provided on the moving plate (38). A liquid crystal elastic strip (374) is installed on the fixing frame (31). The liquid crystal elastic strip (374) is located on the high end side near the first inclined surface (111). A pull rope (373) is connected to the end of the fixing frame (31). The end of the pull rope (373) away from the liquid crystal elastic strip (374) is connected to the upper end of the limiting block (372) so that when the liquid crystal elastic strip (374) is deformed by heat, it pulls the limiting block (372) to move upward.

6. The oil casing end upsetting forming device as described in claim 1, characterized in that, The push tube mechanism (2) includes a third hydraulic telescopic cylinder (21) fixed by a mounting seat. The telescopic end of the third hydraulic telescopic cylinder (21) is fixed with a transverse frame (22). The transverse frame (22) is provided with multiple lifting components, and the multiple lifting components are vertically corresponding to multiple oil casings (100). The lifting assembly includes a round shaft (24) fixed to the transverse frame (22). A first support plate (25) is fixed on one side of the round shaft (24), and a second support plate (26) is rotatably installed on the other side via a torsion spring (28). The second support plate (26) is located on the lower end of the first inclined surface (111). The second support plate (26) is fixed by an angle limiting member, and the first support plate (25) and the second support plate (26) are symmetrical about the center of the round shaft (24). Rubber pads (27) are bonded to the upper surfaces of both the first support plate (25) and the second support plate (26).

7. The oil casing end upsetting forming device as described in claim 6, characterized in that, The angle limiting component includes a buckle (29) that is slidably disposed on the lower surface of the second support plate (26) via a U-shaped enclosure and a slot (210) opened on the round shaft (24). The lower end of the buckle (29) is hook-shaped, which is the pin part (291). The pin part (291) is inserted into the slot (210). A tension spring (211) is installed between the U-shaped enclosure and the buckle (29). The tension spring (211) gives the buckle (29) a tension force along the width direction of the second support plate (26). The upper end of the buckle (29) has a horizontal baffle (23) fixed to the side wall of the support mold (11).

8. The oil casing end upsetting forming device as described in claim 7, characterized in that, The upper end of the buckle (29) is equipped with a second roller (292).

9. The oil casing end upsetting forming device as described in claim 1, characterized in that, The heating mechanism includes an induction heating device (41) that is slidably mounted on the ground via a slide rail slider structure and a fourth hydraulic telescopic cylinder (42) mounted on the ground. The telescopic end of the fourth hydraulic telescopic cylinder (42) is connected to the induction heating device (41), and the induction coil of the induction heating device (41) is axially aligned with the oil casing (100).

10. A method using the oil casing end upsetting forming apparatus as described in claim 1, characterized in that, Includes the following steps: Step 1, Heating: Place the oil casing (100) into the corresponding fixed position and heat the end of the oil casing (100) through the heating mechanism; Step 2, Cleaning: The oil casing (100) at the corresponding fixed station is transferred to the next fixed station by the push pipe mechanism (2). During this process, the cleaning mechanism (3) will be triggered to remove the oxide scale at the end of the oil casing (100). Step 3, 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) through the inner mold; Step 4: Based on the number of upsetting operations required for the oil casing (100), repeat steps 1 to 3. Step 5, Discharge: Complete the upsetting of the oil casing (100) and discharge it from the fixed mechanism.

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