A large-diameter pipe flattening test device

Abstract

This application provides a large-diameter pipe flattening test device, comprising: a worktable for placing the pipe to be tested; a lifting mechanism disposed on one side of the worktable for lifting the pipe to be tested from the ground to the height of the worktable surface; and a blocking mechanism including two baffles respectively disposed on both sides of the worktable along a first direction; at least one baffle has a first state and a second state. In the first state, the baffle is flush with the ground to allow the pipe to be tested on the lifting mechanism to be moved to the worktable before the test begins. In the second state, the baffle forms an angle with the ground to prevent the pipe from rolling after the test. This test device solves the two major safety hazards of difficult handling and uncontrolled rolling of pipes in traditional tests, and is particularly suitable for high-frequency, high-load industrial testing environments.

Description

Technical Field

[0001] This application relates to the field of pipe flattening test technology, specifically to a large-diameter pipe flattening test device. Background Technology

[0002] The flattening test for large-diameter pipes is an important method for evaluating the pipe's resistance to deformation. In traditional tests, due to the large volume and weight of the pipe samples, and the fact that the flattening test machine's worktable is usually at a certain height above the ground, multiple people are needed to move the pipes to the worktable before the test, resulting in low efficiency and safety hazards. Furthermore, after the test, when the flattening test machine's indenter automatically resets, the pipe may roll or slip off the worktable due to its own weight or inertia, causing damage to the bottom components of the equipment, impact to the ground, and even personal injury to the operators. Current technologies lack integrated solutions for pipe handling and post-test anti-rolling, necessitating a testing device that allows for convenient handling and effectively prevents pipe rolling. Utility Model Content

[0003] In view of the above-mentioned defects or deficiencies in the prior art, this application aims to provide a large-diameter pipe flattening test device, comprising:

[0004] A workbench, used to place the pipe to be tested;

[0005] A lifting mechanism is provided on one side of the workbench and is used to lift the pipe to be tested from the ground to the height of the workbench surface.

[0006] The blocking mechanism includes two baffles respectively disposed on both sides of the worktable along a first direction; at least one of the baffles has a first state and a second state. In the first state, the baffle is flush with the ground to move the pipe to be tested on the lifting mechanism to the worktable before the test begins. In the second state, the baffle forms an angle with the ground to prevent the pipe from rolling after the test ends.

[0007] A driving mechanism is provided for driving the baffle to switch between the first state and the second state.

[0008] According to the technical solution provided in the embodiments of this application, the driving mechanism includes a return spring and a pin; the baffle is hinged to the worktable via a rotating shaft, the axial direction of the rotating shaft being a second direction, which is perpendicular to the first direction; one end of the return spring is fixed to the side of the worktable, and the other end is connected to the side end of the baffle, for driving the baffle to rotate from a first state to a second state; the pin is detachably inserted through a first positioning hole between the baffle and the worktable, for locking the baffle position when the baffle is in the first state; when the pin is pulled out, the elastic force of the return spring drives the baffle to rotate around the rotating shaft to the second state.

[0009] According to the technical solution provided in the embodiments of this application, the workbench includes a base placed on the ground and a support plate disposed on the base. A sliding rod is provided on the base and on each side of the support plate along the second direction. A pressure plate is provided between the sliding rods and slidably connected to the sliding rods. The length of the support plate along the first direction is greater than the pressure plate. When the baffle is in the second state, the baffle abuts against the end of the support plate so that the baffle forms an angle with the ground.

[0010] According to the technical solution provided in the embodiments of this application, when the baffle is in the first state, the lifting mechanism is disposed on the baffle.

[0011] According to the technical solution provided in the embodiments of this application, the lifting mechanism is a triangular inclined platform. The triangular inclined platform includes a first right-angled surface and a second right-angled surface that are perpendicular to each other, and an inclined surface connecting the first right-angled surface and the second right-angled surface. The first right-angled surface abuts against the workbench, the second right-angled surface abuts against the baffle, and the inclined surface is used to roll the pipe to be tested. The height of the first right-angled surface is equal to the height of the table.

[0012] According to the technical solution provided in the embodiments of this application, the lifting mechanism is a movable trolley that can be lifted and lowered. The platform of the movable trolley is driven to lift and lower by a hydraulic cylinder, and the surface of the platform is provided with a U-shaped tube slot.

[0013] According to the technical solution provided in the embodiments of this application, the lifting mechanism includes a hydraulic telescopic arm, the end of which is provided with an arc-shaped bracket, and the inner wall of the arc-shaped bracket is provided with a rubber anti-slip layer.

[0014] According to the technical solution provided in the embodiments of this application, a spring fixing seat is provided at the lower part of the side wall of the workbench. One end of the reset spring is fixed to the spring fixing seat, and the other end is connected to the lower side of the baffle. When the baffle is in the first state, the reset spring is in a stretched state. The baffle is provided with a second positioning hole that is coaxially connected to the first positioning hole. The pin passes through the second positioning hole and the first positioning hole in sequence to restrict the rotation of the baffle. The first positioning hole is provided in the side wall of the workbench. When the pin is pulled out, the contraction force of the reset spring drives the baffle to rotate around the rotation axis in the second state direction until the baffle abuts against the support plate.

[0015] According to the technical solution provided in the embodiments of this application, the inclined surface of the triangular ramp is provided with anti-slip texture, and the two sides of the inclined surface along the second direction are provided with detachable pipe guide strips.

[0016] According to the technical solution provided in the embodiments of this application, the bottom of the mobile trolley is provided with an electromagnetic locking assembly. When the platform is raised to the platform height, the electromagnetic locking assembly automatically adsorbs and fixes itself to the metal plate on the side wall of the workbench.

[0017] In summary, this application proposes a large-diameter pipe flattening test device, comprising: a worktable for placing the pipe to be tested; a lifting mechanism disposed on one side of the worktable for lifting the pipe to be tested from the ground to the height of the worktable surface; a blocking mechanism comprising two baffles respectively disposed on both sides of the worktable along a first direction; at least one baffle having a first state and a second state, wherein in the first state the baffle is flush with the ground to move the pipe to be tested on the lifting mechanism to the worktable before the test begins, and in the second state the baffle forms an angle with the ground to prevent the pipe from rolling after the test ends; and a driving mechanism for driving the baffle to switch between the first state and the second state.

[0018] Compared with existing technologies, the advantages of this application are as follows: By setting up a lifting mechanism linked to the workbench, this application can automatically lift large-diameter pipes from the ground to the height of the workbench, eliminating the need for external hoisting equipment or multiple people to handle them, significantly reducing labor intensity and safety risks, and is especially suitable for pipe testing scenarios with a weight exceeding 500kg. The switchable baffle achieves dual functions. In the first state (flat), the baffle is flush with the ground, facilitating the lifting mechanism to smoothly transfer the pipe to the workbench and preventing the pipe from shifting or getting stuck during lifting. In the second state (tilted blocking), after the test, the baffle automatically switches to form an acute angle with the ground, creating a physical barrier and effectively preventing the pipe from rolling downwards towards the equipment or the edge of the workbench, avoiding equipment damage and personnel injury. Through the lifting-blocking linkage design, the two major safety hazards of difficult handling and uncontrolled rolling of pipes in traditional testing are solved, making it particularly suitable for high-frequency, high-load industrial testing environments. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the large-diameter pipe flattening test device provided in the embodiments of this application.

[0020] The text labels in the image represent:

[0021] 1. Base; 2. Pressure plate; 3. Bearing plate; 4. Triangular inclined platform; 5. Baffle; 6. First positioning hole; 7. Second positioning hole; 8. Pin; 9. Return spring; 10. Sliding rod; 11. Spring fixing seat. Detailed Implementation

[0022] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] Example 1

[0025] As mentioned in the background section, in view of the problems in the prior art, this application proposes a large-diameter pipe flattening test device, such as... Figure 1 As shown, it includes:

[0026] A workbench, used to place the pipe to be tested;

[0027] A lifting mechanism is provided on one side of the workbench and is used to lift the pipe to be tested from the ground to the height of the workbench surface.

[0028] The blocking mechanism includes two baffles 5 respectively disposed on both sides of the workbench along a first direction; at least one baffle 5 has a first state and a second state. In the first state, the baffle 5 is flush with the ground to move the pipe to be tested on the lifting mechanism to the workbench before the test begins. In the second state, the baffle 5 forms an angle with the ground to prevent the pipe from rolling after the test ends.

[0029] Specifically, both baffles 5 of the blocking mechanism are made of stainless steel and are rectangular in shape. It should be noted that there is one baffle 5 on each of the front and rear sides of the worktable. Figure 1The image only shows one side of the baffle 5. When there are baffles 5 on both sides, the two baffles 5 have a symmetrical structure, which can block the pipe to be tested to prevent it from rolling down from the front of the support plate 3 and also prevent it from rolling down from the back of the support plate 3.

[0030] A driving mechanism is provided for driving the baffle 5 to switch between the first state and the second state.

[0031] Furthermore, the driving mechanism includes a return spring 9 and a pin 8; the baffle 5 is hinged to the worktable via a rotating shaft, the axial direction of which is a second direction, which is perpendicular to the first direction; one end of the return spring 9 is fixed to the side of the worktable, and the other end is connected to the side of the baffle 5, for driving the baffle 5 to rotate from the first state to the second state; the pin 8 is detachably inserted through the first positioning hole 6 between the baffle 5 and the worktable, for locking the position of the baffle 5 when it is in the first state; when the pin 8 is pulled out, the elastic force of the return spring 9 drives the baffle 5 to rotate around the rotating shaft to the second state.

[0032] Furthermore, a spring fixing seat 11 is provided on the lower part of the side wall of the workbench. One end of the return spring 9 is fixed to the spring fixing seat 11, and the other end is connected to the lower side of the baffle 5. When the baffle 5 is in the first state, the return spring 9 is in a stretched state. The baffle 5 is provided with a second positioning hole 7 that is coaxially connected to the first positioning hole 6. The pin 8 passes through the second positioning hole 7 and the first positioning hole 6 in sequence to restrict the rotation of the baffle 5. The first positioning hole 6 is provided on the side wall of the workbench. When the pin 8 is pulled out, the contraction force of the return spring 9 drives the baffle 5 to rotate around the rotation axis in the second state direction until the baffle 5 abuts against the support plate 3.

[0033] Specifically, the baffle 5 is hinged to the side of the worktable via a 20mm diameter horizontal pin (rotation shaft), with the pin's axial direction aligned with the length of the worktable (second direction). The return spring 9 is a cylindrical helical spring, with one end welded to a pre-welded spring seat at the bottom of the worktable. The other end of the spring is connected to the center of the lower edge of the baffle 5 via a hook integrally formed with the spring. The pin 8 is a 10mm diameter cylindrical pin with a pull ring at one end for easy gripping. The pin 8 passes through the 10mm diameter second positioning hole 7 on the baffle 5 and the corresponding 10mm diameter first positioning hole 6 on the side of the worktable, thereby locking the baffle 5 in position.

[0034] The test process is described as follows: In the test preparation stage, the pin 8 is inserted into the second positioning hole 7 of the baffle 5 and the first positioning hole 6 of the worktable. At this time, the return spring 9 is in a stretched state, and the baffle 5 is locked in the first state of being flush with the ground. Then, the lifting mechanism is activated to smoothly lift the pipe to be tested onto it to a position equal to the height of the worktable surface (optionally, the triangular ramp 4 can be placed on the baffle 5). Then, the pipe is moved laterally from the lifting platform to the worktable by manual operation or auxiliary tools. The triangular ramp 4 is removed. Afterward, the operator holds the pull ring of the pin 8 and pulls out the pin 8. At this time, the return spring 9, which is in a stretched state, is released. The spring 9 releases its elastic potential energy, and its elastic force drives the baffle 5 to rotate upward around the pin axis until the baffle 5 abuts against the bearing plate 3, forming an angle with the ground, reaching the second state. At this time, the baffle 5 can block the pipe to be tested on the front and rear sides of the workbench to prevent the pipe to be tested from rolling off the workbench. After the test, when the manual is ready to remove the pipe to be tested from the workbench, the baffle 5 is manually flipped back to be flush with the ground, and the pin 8 is inserted back into the second positioning hole 7 of the baffle 5 and the first positioning hole 6 of the workbench. Alternatively, the triangular inclined platform 4 can be placed on the baffle 5, and the pipe to be tested can be transported down through the triangular inclined platform 4.

[0035] This structure cleverly utilizes the elastic potential energy of the return spring 9 to drive the switching of the baffle 5's state, eliminating the need for an additional power source and greatly simplifying the drive mechanism's structure. Simultaneously, the locking method using the pin 8 is simple, reliable, low-cost, easy to maintain and operate, enhancing the device's practicality and stability.

[0036] Furthermore, the workbench includes a base 1 placed on the ground and a support plate 3 disposed on the base 1. A sliding rod 10 is provided on the base 1 and on each side of the support plate 3 along the second direction. A pressure plate 2 is provided between the sliding rods 10 and slidably connected to the sliding rods 10. The length of the support plate 3 along the first direction is greater than that of the pressure plate 2. When the baffle 5 is in the second state, the baffle 5 abuts against the end of the support plate 3 so that the baffle 5 forms an angle with the ground.

[0037] In a preferred embodiment, when the baffle 5 is in the first state, the lifting mechanism is disposed on the baffle 5.

[0038] Specifically, when the baffle 5 is in the first state, it is flush with the ground. At this time, the lifting mechanism is placed on it to facilitate the lifting and lowering of the pipe to be tested.

[0039] Furthermore, the lifting mechanism is a triangular inclined platform 4, which includes a first right-angled surface and a second right-angled surface that are perpendicular to each other, and an inclined surface connecting the first right-angled surface and the second right-angled surface. The first right-angled surface abuts against the worktable, and the second right-angled surface abuts against the baffle 5. The inclined surface is used to roll the pipe to be tested, and the height of the first right-angled surface is equal to the height of the table surface.

[0040] Specifically, the triangular inclined platform 4 is welded from steel plates, with its inclined surface connecting the first and second right-angled surfaces at an angle of 30°. A 5mm thick rubber anti-slip layer is bonded to the surface via a hot vulcanization process. During the test preparation phase, the pipe to be tested is placed at the bottom of the inclined surface of the triangular inclined platform 4. Due to the angle of the inclined surface and the pipe's own weight, the pipe will roll along the inclined surface. During rolling, the rubber anti-slip layer increases the friction between the pipe and the inclined surface, ensuring stable rolling. When the pipe rolls to the top of the inclined surface, its height is equal to the height of the worktable surface, at which point the pipe can be moved laterally onto the worktable. The triangular inclined platform 4 has a simple structure and low cost, utilizing gravity to achieve unpowered pipe transport, saving energy consumption. The rubber anti-slip layer further improves the stability of the pipe during transport, effectively preventing slippage or tipping during rolling, ensuring the safety of pipe handling.

[0041] In a preferred embodiment, the lifting mechanism is a liftable mobile trolley, the platform of the mobile trolley is driven to lift by a hydraulic cylinder, and the surface of the platform is provided with a U-shaped tube slot.

[0042] Specifically, the mobile trolley adopts a four-wheel structure, with its frame welded from square tubing. The piston rod of the hydraulic cylinder mounted at the bottom is fixedly connected to the center of the platform's bottom via a flange. The platform is made of Q235 steel plate, with U-shaped pipe slots (50mm deep, width adapted to the outer diameter of the pipe) on its surface. A 3mm thick rubber pad is pasted inside the slot to increase friction and protect the pipe. When moving the pipe, the hydraulic cylinder is activated, extending the piston rod and pushing the platform upwards. The platform stops rising when it reaches the same height as the workbench. The pipe to be tested is placed in the U-shaped pipe slot; due to the slot's fit and the rubber pad, the pipe is stably positioned. The mobile trolley is then moved to the workbench for further operations.

[0043] In a preferred embodiment, the lifting mechanism includes a hydraulic telescopic arm, the end of which is provided with an arc-shaped bracket, and the inner wall of the arc-shaped bracket is provided with a rubber anti-slip layer.

[0044] Specifically, the hydraulic telescopic arm is fixed to a ground support welded from Q345 steel plate, with the bottom of the support secured to the ground by anchor bolts. The end of the hydraulic telescopic arm connects to an arc-shaped bracket via a rotating joint. The arc-shaped bracket is made of Q235 steel plate, with its inner diameter designed according to the outer diameter of common pipes, and its inner wall is lined with a 3mm thick rubber anti-slip layer. When the hydraulic telescopic arm is activated, it extends according to a preset program, raising the arc-shaped bracket to the bottom of the pipe to be tested. The angle of the arc-shaped bracket is adjusted by rotating the joint to ensure a tight fit with the bottom of the pipe. The hydraulic telescopic arm then continues to extend, smoothly lifting and transferring the pipe above the worktable. Fine-tuning the rotating joint and the hydraulic telescopic arm ensures the pipe is accurately placed on the worktable. The rubber anti-slip layer increases the friction between the arc-shaped bracket and the pipe, preventing the pipe from slipping during transport.

[0045] In a preferred embodiment, the inclined surface of the triangular ramp 4 is provided with anti-slip texture, and the two sides of the inclined surface along the second direction are provided with detachable pipe guide strips.

[0046] Specifically, a diamond-shaped anti-slip pattern is machined onto the inclined surface of the triangular ramp 4. Removable pipe guide strips are bolted to both sides of the inclined surface along its width direction (second direction). The guide strips are made of aluminum alloy with a 2mm thick rubber buffer layer adhered to their inner surface. When the pipe rolls on the inclined surface, the diamond-shaped anti-slip pattern increases the friction between the pipe and the inclined surface, preventing slippage. The pipe guide strips on both sides guide the pipe, limiting its rolling trajectory and preventing it from deviating to either side during rolling. The rubber buffer layer cushions the pipe when it contacts the guide strips, reducing damage to the pipe.

[0047] In a preferred embodiment, the bottom of the mobile trolley is provided with an electromagnetic locking assembly. When the platform is raised to the platform height, the electromagnetic locking assembly automatically adsorbs and fixes itself to the metal plate on the side wall of the worktable.

[0048] Specifically, an electromagnetic locking assembly is installed at each of the four corners of the bottom of the mobile trolley. The electromagnets inside are made of high-performance neodymium iron boron permanent magnets. A metal plate, made of Q235 steel, is embedded below each electromagnetic locking assembly, corresponding to the side wall of the workbench. When the mobile trolley's platform is raised to the same height as the workbench surface via a hydraulic cylinder, the control system automatically energizes the electromagnetic locking assembly. The electromagnet generates magnetic force, firmly adhering the metal adsorption plate below the electromagnetic locking assembly to the metal plate on the side wall of the workbench, thus fixing the mobile trolley beside the workbench and preventing displacement during pipe handling. The electromagnetic locking assembly uses a non-contact locking method, enabling quick and accurate fixing of the mobile trolley beside the workbench, ensuring the positioning accuracy between the platform and the workbench. Compared with traditional mechanical connection locking methods, this avoids wear on mechanical parts, improves the service life and repeatability of the device, and ensures the stability of the pipe handling process.

[0049] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. The above descriptions are only preferred embodiments of this application. It should be noted that due to the limitations of written expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of this application.

Claims

1. A large diameter pipe flattening test apparatus characterized by, include: A workbench, used to place the pipe to be tested; A lifting mechanism is provided on one side of the workbench and is used to lift the pipe to be tested from the ground to the height of the workbench surface. The blocking mechanism includes two baffles (5) respectively disposed on both sides of the workbench along a first direction; at least one of the baffles (5) has a first state and a second state. In the first state, the baffle (5) is flush with the ground to allow the pipe to be tested on the lifting mechanism to be moved to the workbench before the test begins. In the second state, the baffle (5) forms an angle with the ground to prevent the pipe from rolling after the test ends. A drive mechanism is provided for driving the baffle (5) to switch between the first state and the second state.

2. A large diameter pipe crush testing apparatus as claimed in claim 1, wherein: The driving mechanism includes a return spring (9) and a pin (8); the baffle (5) is hinged to the worktable via a rotating shaft, the axial direction of which is a second direction, which is perpendicular to the first direction; one end of the return spring (9) is fixed to the side of the worktable, and the other end is connected to the side of the baffle (5), for driving the baffle (5) to rotate from the first state to the second state; the pin (8) is detachably inserted through the first positioning hole (6) between the baffle (5) and the worktable, for locking the position of the baffle (5) when it is in the first state; when the pin (8) is pulled out, the elastic force of the return spring (9) drives the baffle (5) to rotate around the rotating shaft to the second state.

3. A large diameter pipe crush testing apparatus as claimed in claim 2, wherein: The workbench includes a base (1) placed on the ground and a support plate (3) provided on the base (1). A sliding rod (10) is provided on the base (1) and on both sides of the support plate (3) along the second direction. A pressure plate (2) is provided between the sliding rods (10) and slidably connected to the sliding rods (10). The length of the support plate (3) along the first direction is greater than that of the pressure plate (2). When the baffle (5) is in the second state, the baffle (5) abuts against the end of the support plate (3) so that the baffle (5) forms an angle with the ground.

4. A large diameter pipe crush testing apparatus as claimed in claim 3, wherein: When the baffle (5) is in the first state, the lifting mechanism is located on the baffle (5).

5. A large diameter pipe crush testing apparatus as claimed in claim 4, wherein: The lifting mechanism is a triangular inclined platform (4). The triangular inclined platform (4) includes a first right-angled surface and a second right-angled surface that are perpendicular to each other, and an inclined surface that connects the first right-angled surface and the second right-angled surface. The first right-angled surface abuts against the workbench, and the second right-angled surface abuts against the baffle (5). The inclined surface is used to roll the pipe to be tested. The height of the first right-angled surface is equal to the height of the table.

6. A large diameter pipe crush testing apparatus as defined in claim 4, wherein: The lifting mechanism is a movable trolley that can be lifted and lowered. The platform of the movable trolley is driven to lift and lower by a hydraulic cylinder, and the surface of the platform is provided with a U-shaped tube slot.

7. The large-diameter pipe flattening test device according to claim 1, characterized in that: The lifting mechanism includes a hydraulic telescopic arm, the end of which is provided with an arc-shaped bracket, and the inner wall of the arc-shaped bracket is provided with a rubber anti-slip layer.

8. The large diameter pipe crush test apparatus of claim 3, wherein: The lower part of the side wall of the workbench is provided with a spring fixing seat (11). One end of the reset spring (9) is fixed to the spring fixing seat (11), and the other end is connected to the lower side of the baffle (5). When the baffle (5) is in the first state, the reset spring (9) is in a stretched state. The baffle (5) is provided with a second positioning hole (7) that is coaxially connected to the first positioning hole (6). The pin (8) passes through the second positioning hole (7) and the first positioning hole (6) in sequence to restrict the rotation of the baffle (5). The first positioning hole (6) is provided on the side wall of the workbench. When the pin (8) is pulled out, the contraction force of the reset spring (9) drives the baffle (5) to rotate around the rotation axis in the second state direction until the baffle (5) abuts against the bearing plate (3).

9. The large diameter pipe crush test apparatus of claim 5, wherein: The inclined surface of the triangular ramp (4) is provided with anti-slip texture, and the two sides of the inclined surface along the second direction are provided with detachable pipe guide strips.

10. The large diameter pipe crush test apparatus of claim 6, wherein: The bottom of the mobile trolley is equipped with an electromagnetic locking assembly. When the platform is raised to the platform height, the electromagnetic locking assembly automatically adsorbs and fixes itself to the metal plate on the side wall of the worktable.

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