A hydraulic bending tool for oil pipelines

Abstract

This application belongs to the field of pipeline processing technology, specifically relating to a hydraulic bending tool for oil pipelines. The tool includes a fixed base and a fixed frame fixedly mounted on the fixed base. A first upper pressure plate and a second upper pressure plate are symmetrically and rotatably arranged at both ends of the top of the fixed frame. A hydraulic drive device is mounted on the fixed base. The drive end of the hydraulic drive device is connected to a lower pressure plate. The lower pressure plate is located between the first and second upper pressure plates, and a bending space is formed between the first and second upper pressure plates and the lower pressure plate to accommodate the oil pipeline to be bent. This tool can bend oil pipelines at different angles, adapt to different pipe diameters, has high bending accuracy, is convenient and safe to operate, avoids welding operations, and saves materials and labor time.

Description

Technical Field

[0001] This application relates to the field of pipeline processing technology, and in particular to a hydraulic bending tool for oil pipelines. Background Technology

[0002] This application belongs to the field of pipeline processing technology, specifically relating to a hydraulic bending tool for oil pipelines. Systems using hydraulic oil as the transmission medium are widely used in industrial equipment, such as the disc brake hydraulic braking system of a main shaft hoist, which relies on oil pipelines for power transmission. During daily operation and inspection of equipment, oil pipelines, especially at bends, are frequently damaged due to vibration, corrosion, or fatigue, directly affecting production progress.

[0003] Currently, when replacing damaged bends in oil pipelines on-site, the common solutions are to add a separate elbow fitting for connection, or to cut and weld a section of new pipe to form the required bend. Both methods rely on introducing additional connection points into the pipeline system or creating new welds.

[0004] However, using the method of adding elbows is difficult to guarantee the extremely high shape accuracy and fit of the connection interface due to limitations in on-site processing conditions and manufacturing tolerances of pipe fittings. This can easily lead to leakage due to inadequate sealing, failing to meet the stringent airtightness requirements of hydraulic systems. Welding, on the other hand, poses safety risks due to open flames and requires highly skilled operators. Both existing methods are time-consuming and labor-intensive, resulting in waste of connectors or pipe materials, and overall low efficiency and insufficient reliability. Utility Model Content

[0005] This application provides a hydraulic bending tool for oil pipelines to solve the technical problems of low connection accuracy, poor sealing, safety hazards, low efficiency, and material waste caused by adding elbows or welding methods when replacing damaged oil pipelines.

[0006] To achieve the above objectives, this application provides a hydraulic bending tool for oil pipelines, comprising:

[0007] Fixed base; fixed bracket fixedly mounted on the fixed base;

[0008] A first and second upper pressure plate symmetrically and rotatably mounted at both ends of the top of the fixed frame; a hydraulic drive device mounted on the fixed base;

[0009] The lower pressure plate is connected to the drive end of the hydraulic drive device; the lower pressure plate is located between the first upper pressure plate and the second upper pressure plate, and a bending space is formed between the first upper pressure plate, the second upper pressure plate and the lower pressure plate to accommodate the oil pipeline to be bent.

[0010] Preferably, the pressing surfaces of the first upper pressure plate, the second upper pressure plate, and the lower pressure plate are all arc-shaped surfaces.

[0011] Preferably, the top two ends of the fixed frame are provided with sliding bearings; the first upper pressure plate and the second upper pressure plate are rotatably mounted on the fixed frame through the sliding bearings.

[0012] Preferably, the bottom of the fixed base is provided with an anti-slip pad.

[0013] Preferably, the pressing surface of the first upper pressure plate is provided with a first anti-slip texture.

[0014] Preferably, the pressing surface of the second upper pressure plate is provided with a second anti-slip texture.

[0015] Preferably, the fixing frame includes two opposing and parallel support plates, the lower parts of the two support plates are connected by a fixed base, and the upper parts of the two support plates are connected by at least one transverse connecting rod.

[0016] Preferably, the hydraulic drive device is a hydraulic jack.

[0017] Preferably, the base of the hydraulic drive device is detachably fixed to the fixed base by bolts and nuts.

[0018] Preferably, a U-shaped groove is provided at the top center of the lower pressure plate.

[0019] As can be seen from the above technical solutions, this application provides a hydraulic bending tool for oil pipelines. The tool includes: a fixed base; a fixed frame fixedly mounted on the fixed base; a first upper pressure plate and a second upper pressure plate symmetrically and rotatably mounted at both ends of the top of the fixed frame; a hydraulic drive device mounted on the fixed base; and a lower pressure plate connected to the drive end of the hydraulic drive device. The lower pressure plate is located between the first and second upper pressure plates, and a bending space is formed between the first and second upper pressure plates and the lower pressure plate to accommodate the oil pipeline to be bent. This application uses the hydraulic drive device to drive the lower pressure plate to move within the bending space, forcing the oil pipeline to deform and causing the symmetrically mounted first and second upper pressure plates to rotate, thus achieving on-site bending of the oil pipeline at different angles, with safe and convenient operation. Attached Figure Description

[0020] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the hydraulic bending tool for oil pipelines provided in the embodiments of this application;

[0022] Figure 2A schematic diagram of the initial bending state of the hydraulic bending tool for oil pipelines provided in this application embodiment;

[0023] Figure 3 This is a schematic diagram showing the completed bending state of the hydraulic bending tool for oil pipelines provided in this embodiment of the application.

[0024] Illustration markings:

[0025] The components include: 1. Fixed base; 11. Anti-slip pad; 2. Fixed frame; 21. Sliding bearing; 3. First upper pressure plate; 31. First anti-slip texture; 4. Second upper pressure plate; 41. Second anti-slip texture; 5. Hydraulic drive device; 6. Lower pressure plate. Detailed Implementation

[0026] The embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described below do not represent all embodiments consistent with this application. They are merely examples of systems and methods consistent with some aspects of this application.

[0027] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0028] The terms "first," "second," "third," etc., are used to distinguish similar or related objects or entities, and do not necessarily imply a specific order or sequence, unless otherwise specified. It should be understood that such terms can be used interchangeably where appropriate.

[0029] The terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclude inclusion, for example, a product or device that includes a range of components is not necessarily limited to all of the components that are clearly listed, but may include other components that are not clearly listed or that are inherent to such product or device.

[0030] In the field of oil pipeline repair and replacement technology, existing solutions for dealing with damaged bends in oil pipelines mainly rely on adding independent elbows or performing on-site welding. Adding elbows requires cutting and installing a separate elbow connector at both ends of the damaged pipe section, while welding requires cutting a section of straight pipe and welding it to form the required bend.

[0031] When using the method of adding elbows, due to limited on-site processing conditions and manufacturing tolerances in the pipe fittings, it is difficult to achieve extremely high shape accuracy and tight fit at the connection interface between the elbow and the straight pipe section. Minor gaps or misalignments at the connection interface can easily lead to poor sealing and hydraulic oil leakage, failing to meet the stringent requirements of hydraulic transmission systems for pipeline tightness. When using welding methods, the operation process generates open flames, high temperatures, and electric arcs, posing significant safety hazards in locations with flammable and explosive materials, such as coal mines and oil depots. Furthermore, welding quality largely depends on the operator's skill level; defects such as incomplete penetration and porosity may occur in the weld, affecting the long-term reliability of the pipeline. Both existing methods involve multiple processes such as cutting, assembly, fastening, or welding, which are time-consuming and labor-intensive, resulting in waste of finished elbows or some pipe material, leading to overall low efficiency and poor economic performance.

[0032] To address the aforementioned problems, this application provides a hydraulic bending tool for oil pipelines, see attached document. Figures 1-3 The hydraulic bending tool for oil pipelines includes a fixed base 1, a fixed frame 2, a first upper pressure plate 3, a second upper pressure plate 4, a hydraulic drive device 5, and a lower pressure plate 6.

[0033] The fixed base 1 is the basic support component of the entire tool. The fixed base 1 is typically made of welded metal sheet or profiles, with a flat bottom contact surface. The fixed base 1 is placed directly on the work surface or workbench, providing a stable mounting platform for all upper components and bearing the reaction forces during operation.

[0034] The fixing frame 2 is fixedly mounted on the fixed base 1, typically through welding or bolt connection. The main function of the fixing frame 2 is to provide mounting support for the first upper pressure plate 3 and the second upper pressure plate 4. The installation position of the fixing frame 2 needs to correspond to the position of the hydraulic drive device 5 on the fixed base 1 to ensure that the first upper pressure plate 3 and the second upper pressure plate 4 can form a suitable bending space with the lower pressure plate 6 after installation. The fixing frame 2 itself needs to have sufficient structural strength to withstand the forces transmitted by the first upper pressure plate 3 and the second upper pressure plate 4 during the bending operation, preventing deformation that could affect the bending process.

[0035] The first upper pressure plate 3 and the second upper pressure plate 4 are symmetrically arranged at both ends of the top of the fixed frame 2. The first upper pressure plate 3 and the second upper pressure plate 4 are rotatably connected to the fixed frame 2. The first upper pressure plate 3 and the second upper pressure plate 4 work together with the lower pressure plate 6 to form a bending space, which constrains and guides the oil pipeline during the bending operation, helping the oil pipeline to bend to the required angle in the preset direction.

[0036] The hydraulic drive device 5 is mounted on the fixed base 1. The hydraulic drive device 5 is the power source of the hydraulic bending tool for the oil pipeline. It can convert hydraulic energy into mechanical energy and provide an upward driving force to the lower pressure plate 6 through the linear motion of the drive end, so as to push the lower pressure plate 6 to achieve lifting and lowering movement, and provide continuous power support for bending the oil pipeline.

[0037] Specifically, the hydraulic drive device 5 can have various implementations. For example, in some embodiments, the hydraulic drive device 5 can be a manual hydraulic jack. The operator drives the manual hydraulic jack by cranking a handle, causing its piston rod to output linear motion as the drive end. In other embodiments, the hydraulic drive device 5 can also be an electro-hydraulic pump station. The electro-hydraulic pump station uses an electric motor to drive a hydraulic pump to generate pressurized oil and control the piston rod of the hydraulic cylinder to extend and retract.

[0038] The lower pressure plate 6 is connected to the drive end of the hydraulic drive device 5. The installation height of the lower pressure plate 6 needs to ensure that, in its initial state, it forms a sufficient space between itself and the first upper pressure plate 3 and the second upper pressure plate 4 to accommodate the oil pipe. The main function of the lower pressure plate 6 is to receive the driving force transmitted by the hydraulic drive device 5, convert the driving force into a pushing force on the oil pipe, and push the oil pipe to contact the first upper pressure plate 3 and the second upper pressure plate 4 through upward movement, causing it to bend and deform.

[0039] A bending space is formed between the first upper pressure plate 3, the second upper pressure plate 4, and the lower pressure plate 6 to accommodate the oil pipe to be bent. When the hydraulic bending tool for the oil pipe is in its initial standby state, the drive end of the hydraulic drive device 5 is in a retracted state. At this time, the lower pressure plate 6 is at its lowest point of stroke along with the drive end of the hydraulic drive device 5, and the relative positions between the lower pressure plate 6 and the first upper pressure plate 3 and the second upper pressure plate 4 constitute this bending space. The operator places a section of straight oil pipe to be bent horizontally into this bending space, and the oil pipe is placed stably on the lower pressure plate 6. This bending space has sufficient size to accommodate oil pipes of different diameters. During the subsequent bending process, as the lower pressure plate 6 rises and the first upper pressure plate 3 and the second upper pressure plate 4 rotate, the shape of the bending space continuously changes, providing the necessary range of motion for the bending deformation of the oil pipe until the oil pipe is bent to the required angle within the bending space.

[0040] It should be noted that when the hydraulic bending tool for oil pipelines is in operation, the operator first places the tool stably on the fixed base 1. Then, a section of the straight oil pipeline to be bent is horizontally placed into the bending space formed by the first upper pressure plate 3, the second upper pressure plate 4, and the lower pressure plate 6 in its initial position. At this time, the drive end of the hydraulic drive device 5 is in a retracted state, and the oil pipeline lies horizontally on the upper surface of the lower pressure plate 6 (see...). Figure 2 , Figure 2 (A schematic diagram of an oil pipeline placed within a bending space).

[0041] Then, the operator drives the hydraulic drive unit 5, and the drive end of the hydraulic drive unit 5 extends vertically upward, causing the lower pressure plate 6 to move upward. The lower pressure plate 6 contacts and pushes against the lower surface of the oil pipeline.

[0042] The oil pipeline is simultaneously subjected to the upward thrust of the lower pressure plate 6 and the constraint of the first upper pressure plate 3 and the second upper pressure plate 4. Under the action of the thrust and the constraint, the oil pipeline moves upward and comes into close contact with the pressing surfaces of the first upper pressure plate 3 and the second upper pressure plate 4, thereby causing the first upper pressure plate 3 and the second upper pressure plate 4 to rotate around the axis of the top of the fixed frame 2.

[0043] As the first upper pressure plate 3 and the second upper pressure plate 4 rotate, their pressing surfaces slide along the outer wall of the oil pipeline. This provides space for the bending deformation of the oil pipeline and continuously applies the pushing force of the lower pressure plate 6 to the oil pipeline, causing the middle part of the oil pipeline to bend. Ultimately, the material in the middle of the oil pipeline undergoes plastic deformation, forming a permanently bent shape that bulges upwards (see...). Figure 3 , Figure 3 (A schematic diagram of the structure of the oil pipeline after bending).

[0044] As can be seen from the above technical solution, the hydraulic bending tool for oil pipelines provided in this embodiment forms a stable support structure through a fixed base 1 and a fixed frame 2. The lower pressure plate 6 is driven by a hydraulic drive device 5 to move linearly within the bending space enclosed by the first upper pressure plate 3 and the second upper pressure plate 4. The tool cold-bends the straight oil pipeline as a whole, resulting in a seamless, integral structure without connecting interfaces. This solves the leakage problem caused by poor sealing at the connecting interfaces when using methods that add elbows, thus meeting the hydraulic system's requirements for pipeline airtightness. The entire bending process is a mechanical cold bending operation, without welding, thus eliminating the safety risks of open flames and high temperatures associated with welding methods and reducing reliance on the operator's welding skills. The tool completes the bending by driving the lower pressure plate 6 to push the oil pipeline and rotate the first upper pressure plate 3 and the second upper pressure plate 4, simplifying the on-site pipe bending process and solving the problems of cumbersome procedures, time-consuming and labor-intensive processes, and waste of connecting parts or pipe materials associated with existing methods.

[0045] In some embodiments, see Appendix Figure 1 The pressing surface of the first upper pressure plate 3 is an arc-shaped surface. The pressing surface of the second upper pressure plate 4 is an arc-shaped surface. The pressing surface of the lower pressure plate 6 is an arc-shaped surface.

[0046] The arc-shaped surface of the first upper pressure plate 3 refers to the arc-shaped working surface of the first upper pressure plate 3 that contacts the oil pipeline. The radius of curvature of this arc-shaped surface is designed according to the outer diameter range of the oil pipeline to be bent. The arc-shaped surface of the first upper pressure plate 3 extends along the axial direction of the oil pipeline, forming a contact area that fits the outer wall of the pipe.

[0047] The arc-shaped surface of the second upper pressure plate 4 refers to the arc-shaped working surface of the second upper pressure plate 4 that contacts the oil pipeline. The arc-shaped surface of the second upper pressure plate 4 is symmetrically arranged with respect to the arc-shaped surface of the first upper pressure plate 3. The radius of curvature of the arc-shaped surface of the second upper pressure plate 4 is the same as that of the arc-shaped surface of the first upper pressure plate 3, ensuring that a balanced constraint force is applied to the oil pipeline.

[0048] The arc-shaped surface of the lower pressure plate 6 refers to the top surface of the lower pressure plate 6 that contacts the oil pipeline, which is arc-shaped. The arc-shaped surface of the lower pressure plate 6 is located at the middle of the top of the lower pressure plate 6. The radius of curvature of the arc-shaped surface of the lower pressure plate 6 is designed according to the outer diameter of the oil pipeline, so that the oil pipeline can be stably placed on the upper surface of the lower pressure plate 6.

[0049] As can be seen from the above technical solution, this embodiment sets the pressing surfaces of the first upper pressure plate 3, the second upper pressure plate 4, and the lower pressure plate 6 as arc-shaped surfaces, so that the contact surface shape of these three components with the oil pipeline matches the outer contour of the pipeline. The arc-shaped surface design increases the contact area between the pressing surface and the outer wall of the oil pipeline, dispersing the stress at the contact point during bending and reducing the possibility of indentations or local deformation on the surface of the oil pipeline. The guiding effect of the arc-shaped surface makes the oil pipeline more uniformly stressed during bending deformation, which is conducive to forming a smooth bending shape.

[0050] In some embodiments, see Appendix Figure 1 The top two ends of the fixed frame 2 are provided with sliding bearings 21. The first upper pressure plate 3 and the second upper pressure plate 4 are rotatably mounted on the fixed frame 2 via the sliding bearings 21.

[0051] It should be noted that during the bending operation of the hydraulic pipe bending tool, the operator drives the hydraulic drive device 5. The hydraulic drive device 5 drives the lower pressure plate 6 to push the oil pipe upward. The oil pipe bends upward and comes into contact with the pressing surfaces of the first upper pressure plate 3 and the second upper pressure plate 4. The force generated by the contact causes the first upper pressure plate 3 and the second upper pressure plate 4 to rotate. Since the first upper pressure plate 3 and the second upper pressure plate 4 are connected to the fixed frame 2 through the sliding bearing 21, the first upper pressure plate 3 and the second upper pressure plate 4 can rotate around the axis of the sliding bearing 21. When the first upper pressure plate 3 and the second upper pressure plate 4 rotate, their pressing surfaces slide along the outer wall of the oil pipe, completing the bending action.

[0052] As can be seen from the above technical solution, this embodiment uses sliding bearings 21 at both ends of the top of the fixed frame 2 to rotatably mount the first upper pressure plate 3 and the second upper pressure plate 4 on the fixed frame 2. The sliding bearings 21 support the rotation of the first upper pressure plate 3 and the second upper pressure plate 4. During the bending process, the first upper pressure plate 3 and the second upper pressure plate 4 can rotate smoothly through the sliding bearings 21 to adapt to the bending deformation of the oil pipeline.

[0053] In some embodiments, see Appendix Figure 1 The base 1 has an anti-slip pad 11 at the bottom.

[0054] The anti-slip pad 11 is set at the bottom of the fixed base 1. The anti-slip pad 11 is made of rubber or other elastic materials with a high coefficient of friction.

[0055] Understandably, when the operator places the hydraulic bending tool for the oil pipe on the work surface or workbench, the anti-slip pad 11 is in direct contact with the surface. During bending operations, the fixed base 1 bears the reaction force from the upper components. The anti-slip pad 11, through its material properties, increases the static friction between the fixed base 1 and the surface, preventing the hydraulic bending tool from sliding or shifting during operation.

[0056] As can be seen from the above technical solution, this embodiment increases the friction between the fixed base 1 and the placement surface by setting an anti-slip pad 11 at the bottom of the fixed base 1. The friction provided by the anti-slip pad 11 prevents the hydraulic bending tool of the oil pipe from moving unexpectedly during the bending operation. This ensures the stability of the tool during the bending operation, keeps the relative positional relationship between the first upper pressure plate 3, the second upper pressure plate 4 and the lower pressure plate 6 in a preset state, and ensures that the bending process proceeds as expected.

[0057] In some embodiments, see Appendix Figure 1 The first anti-slip texture 31 is provided on the pressing surface of the first upper pressure plate 3. The first anti-slip texture 31 is directly processed or attached to the pressing surface of the first upper pressure plate 3.

[0058] In some embodiments, see Appendix Figure 1 The second anti-slip texture 41 is provided on the pressing surface of the second upper pressure plate 4. The second anti-slip texture 41 is directly processed or attached to the pressing surface of the second upper pressure plate 4.

[0059] First anti-slip textures 31 and second anti-slip textures 41 are respectively provided on the pressing surfaces of the first upper pressure plate 3 and the second upper pressure plate 4. The first anti-slip textures 31 and the second anti-slip textures 41 increase the coefficient of friction between the pressing surfaces of the first upper pressure plate 3 and the second upper pressure plate 4 and the outer wall of the oil pipeline. During bending, the friction provided by the first anti-slip textures 31 and the second anti-slip textures 41 restricts the tendency of the oil pipeline to slide relative to the pressing surfaces of the first upper pressure plate 3 and the second upper pressure plate 4. This helps the oil pipeline maintain a relatively stable contact position with the first upper pressure plate 3 and the second upper pressure plate 4 during bending deformation, thereby making the transmission of bending force on the oil pipeline more direct. The presence of the first anti-slip textures 31 and the second anti-slip textures 41 reduces the possibility of bending position deviation or unstable bending shape due to slippage of the contact surfaces.

[0060] In some embodiments, see Appendix Figure 1The mounting bracket 2 includes two opposing and parallel support plates. The lower parts of the two support plates are connected by a fixed base 1. The upper parts of the two support plates are connected by at least one transverse connecting rod.

[0061] During the bending operation of the hydraulic bending tool for the oil pipeline, the two support plates of the fixed frame 2 provide mounting positions for the first upper pressure plate 3 and the second upper pressure plate 4. The two support plates bear the force transmitted by the first upper pressure plate 3 and the second upper pressure plate 4 during the bending process. The fixed base 1 and the transverse connecting rod together maintain the relative position of the two support plates, keeping the structure of the fixed frame 2 stable.

[0062] As can be seen from the above technical solution, in this embodiment, the fixing frame 2 is constructed as a frame structure including two support plates, a fixed base 1, and a transverse connecting rod. The fixed base 1 and the transverse connecting rod connect the lower and upper parts of the two support plates respectively, so that the two support plates form a stable whole. This structure gives the fixing frame 2 sufficient rigidity to withstand the load during bending operations and ensures the stability of the installation positions of the first upper pressure plate 3 and the second upper pressure plate 4.

[0063] See appendix Figure 1 In a preferred embodiment, the hydraulic drive device 5 is a hydraulic jack. The hydraulic jack is fixedly mounted on the fixed base 1, and the piston rod of the hydraulic jack is connected to the lower pressure plate 6 as the drive end.

[0064] It should be noted that when the hydraulic bending tool is used for bending the oil pipe, the operator cranks the handle of the hydraulic jack. The manual pump inside the hydraulic jack starts working, pressing hydraulic oil into the hydraulic cylinder of the hydraulic jack. The hydraulic oil pushes the piston inside the hydraulic cylinder, causing the piston rod to extend upwards in a straight line as the driving end. The upwardly extending piston rod pushes the lower pressure plate 6 upwards. The lower pressure plate 6 moves upwards and pushes the oil pipe, causing the oil pipe to begin bending and deforming. When it is necessary to stop or return, the operator opens the unloading valve of the hydraulic jack. The hydraulic oil in the hydraulic cylinder flows back under the action of the external load or the internal spring, and the piston rod drives the lower pressure plate 6 to retract downwards.

[0065] As can be seen from the above technical solution, in this embodiment, the hydraulic drive device 5 is specifically configured as a hydraulic jack. A hydraulic jack is a mature and reliable linear drive component that can output powerful linear thrust by simply cranking the handle. The use of a hydraulic jack eliminates the need for an external power or air source for the hydraulic bending tool of the oil pipe; the entire driving process can be completed manually, improving the tool's adaptability and convenience in field use. The force output by the hydraulic jack is stable and maintainable, which is beneficial for controlling the bending deformation process of the oil pipe. The hydraulic jack has a simple structure and is easy to maintain, reducing the complexity and operating cost of the tool. Specificifying the hydraulic drive device 5 as a hydraulic jack provides a stable, reliable, and easy-to-implement power solution for the hydraulic bending tool of the oil pipe.

[0066] In some embodiments, see Appendix Figure 1 The base of the hydraulic drive unit 5 is detachably fixed to the fixed base 1 by bolts and nuts. The base of the hydraulic drive unit 5 is provided with bolt holes. The fixed base 1 is provided with corresponding bolt holes. Bolts pass through the bolt holes on the base of the hydraulic drive unit 5 and the fixed base 1. Nuts are screwed onto the threaded end of the bolts to fasten the hydraulic drive unit 5 to the fixed base 1.

[0067] As can be seen from the above technical solution, in this embodiment, the hydraulic drive device 5 is detachably fixed to the fixed base 1 using bolts and nuts. The bolt and nut connection method allows the hydraulic drive device 5 to be separated from the fixed base 1. When maintenance or replacement of the hydraulic drive device 5 is required, the operator can loosen the nuts, remove the bolts, and detach the hydraulic drive device 5 from the fixed base 1. This provides convenience for the maintenance, repair, or replacement of the hydraulic drive device 5 without requiring complete disassembly or damage to other components.

[0068] In some embodiments, see Appendix Figure 1 A U-shaped groove is provided at the center of the top of the lower pressure plate 6. The U-shaped groove is located in the central area of ​​the top surface of the lower pressure plate 6. The U-shaped groove extends along the length of the lower pressure plate 6.

[0069] It should be noted that when the hydraulic bending tool is used to bend the oil pipe, the operator places the oil pipe into the bending space. The oil pipe is positioned on top of the lower pressure plate 6. The lower surface of the oil pipe contacts the U-shaped groove of the lower pressure plate 6. The sidewalls of the U-shaped groove restrict the horizontal movement of the oil pipe.

[0070] As can be seen from the above technical solution, a U-shaped groove is provided at the top center of the lower pressure plate 6. The U-shaped groove provides a placement position for the oil pipe. The lower surface of the oil pipe is embedded in the U-shaped groove. The sidewall of the U-shaped groove prevents the oil pipe from rolling or sliding laterally during bending, keeping the oil pipe centered and stable on the lower pressure plate 6. This helps ensure that the line of action of the bending force passes through the center of the oil pipe, so that the oil pipe is subjected to uniform force when bending.

[0071] Similar parts between the embodiments provided in this application can be referred to mutually. The specific implementation methods provided above are only a few examples under the overall concept of this application and do not constitute a limitation on the scope of protection of this application. For those skilled in the art, any other implementation methods extended from the solution of this application without creative effort shall fall within the scope of protection of this application.

Claims

1. A hydraulic bending tool for oil pipelines, characterized in that, include: Fixed base (1); fixed bracket (2) fixedly mounted on the fixed base (1); A first upper pressure plate (3) and a second upper pressure plate (4) are symmetrically and rotatably arranged at both ends of the top of the fixed frame (2); a hydraulic drive device (5) is arranged on the fixed base (1); The lower pressure plate (6) is connected to the drive end of the hydraulic drive device (5); the lower pressure plate (6) is located between the first upper pressure plate (3) and the second upper pressure plate (4), and a bending space for accommodating the oil pipeline to be bent is formed between the first upper pressure plate (3), the second upper pressure plate (4) and the lower pressure plate (6).

2. The hydraulic bending tool for oil pipelines according to claim 1, characterized in that, The pressing surfaces of the first upper pressure plate (3), the second upper pressure plate (4) and the lower pressure plate (6) are all arc-shaped surfaces.

3. The hydraulic bending tool for oil pipelines according to claim 1, characterized in that, The top two ends of the fixed frame (2) are provided with sliding bearings; the first upper pressure plate (3) and the second upper pressure plate (4) are rotatably mounted on the fixed frame (2) through the sliding bearings (21).

4. The hydraulic bending tool for oil pipelines according to claim 1, characterized in that, The bottom of the fixed base (1) is provided with an anti-slip pad (11).

5. The hydraulic bending tool for oil pipelines according to claim 1, characterized in that, The first anti-slip texture (31) is provided on the pressing surface of the first upper pressure plate (3).

6. The hydraulic bending tool for oil pipelines according to claim 1, characterized in that, The second upper pressure plate (4) has a second anti-slip texture (41) on its pressing surface.

7. The hydraulic bending tool for oil pipelines according to claim 1, characterized in that, The fixing frame (2) includes two opposing and parallel support plates. The lower parts of the two support plates are connected by the fixing base (1), and the upper parts of the two support plates are connected by at least one transverse connecting rod.

8. The hydraulic bending tool for oil pipelines according to claim 1, characterized in that, The hydraulic drive device (5) is a hydraulic jack.

9. The hydraulic bending tool for oil pipelines according to claim 1, characterized in that, The base of the hydraulic drive device (5) is detachably fixed to the fixed base (1) by bolts and nuts.

10. The hydraulic bending tool for oil pipelines according to claim 1, characterized in that, The lower pressure plate (6) has a U-shaped groove at the top center.

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