A pipe diameter simulation loading device

Abstract

The application relates to the technical field of pipeline testing equipment, in particular to a pipe diameter simulation loading device which comprises a loading device for simulating the pipe diameter of a pipeline to be expanded and a moving device for moving the loading device; the loading device comprises a loading support base and a pipe diameter simulation structure; the loading support base is connected to the moving device for movement; a plurality of pipe diameter simulation structures are connected to the loading support base to form a simulation pipe diameter test cavity for the entry of an expanding die; the pipe diameter simulation structure comprises a pipe diameter simulation block and a pipe diameter adjusting structure; the pipe diameter simulation block is connected to the pipe diameter adjusting structure; the pipe diameter adjusting structure drives the pipe diameter simulation block to move radially relative to the loading support base; and the size of the simulation pipe diameter test cavity is adjusted to simulate different pipe diameters. The adjustable pipe diameter mode structure setting improves the convenience of expanding die testing, saves testing cost and enhances the flexibility of real-time working data testing of the expanding die.

Description

Technical Field

[0001] This utility model belongs to the technical field of pipeline testing equipment, and in particular relates to a pipe diameter simulation loading device. Background Technology

[0002] Existing pipeline simulation devices have overly simplistic testing modes, making it difficult to simulate various types of pipelines to be expanded. Furthermore, the testing process relies primarily on on-site operators observing the use of the expansion mold, failing to effectively detect and analyze the actual working data of the expansion mold during the testing process. This results in weak monitoring and analysis of the expansion mold, hindering its improvement. Therefore, this utility model proposes a new solution to address the aforementioned technical problems. Utility Model Content

[0003] The purpose of this invention is to provide a pipe diameter simulation loading device, which adopts an adjustable pipe diameter mode structure, thereby improving the convenience of expanding mold testing, saving testing costs, and enhancing the flexibility of real-time working data testing of expanding molds.

[0004] Based on this, the present invention provides a pipe diameter simulation loading device, comprising:

[0005] A loading device for simulating the diameter of a pipe to be expanded, and a moving device for moving the loading device;

[0006] The loading device includes a loading support and a pipe diameter simulation structure. The loading support is connected to the moving device and moves. Multiple pipe diameter simulation structures are connected to the loading support to form a simulated pipe diameter test cavity for the expansion mold to enter. The pipe diameter simulation structure includes a pipe diameter simulation block and a pipe diameter adjustment structure. The pipe diameter simulation block is connected to the pipe diameter adjustment structure. The pipe diameter adjustment structure drives the pipe diameter simulation block to move radially relative to the loading support, thereby simulating different pipe diameters by adjusting the size of the simulated pipe diameter test cavity.

[0007] As described above, in a pipe diameter simulation loading device, multiple pipe diameter simulation structures are equidistantly connected to the loading support.

[0008] As described above, in a pipe diameter simulation loading device, the pipe diameter simulation block is provided with an arc-shaped portion and a pipe diameter simulation portion mounting position for limiting the pipe diameter simulation block; the pipe diameter adjustment structure is connected to the pipe diameter simulation portion mounting position, drives the pipe diameter simulation block to move radially, and forms the simulated pipe diameter test cavity by surrounding multiple arc-shaped portions.

[0009] As described above, the pipe diameter simulation loading device includes an adjusting cylinder body and an adjusting cylinder push rod in the pipe diameter adjustment structure. One end of the adjusting cylinder push rod is connected to the adjusting cylinder body, and the other end is connected to the mounting position of the pipe diameter simulation part. The adjusting cylinder push rod is driven by the pipe diameter adjustment structure to drive the pipe diameter simulation block to move radially relative to the loading support.

[0010] As described above, in a pipe diameter simulation loading device, the pipe diameter simulation part is provided with an arc-shaped groove at the mounting position, and the adjusting cylinder push rod is provided with an arc-shaped connecting part. The adjusting cylinder push rod is connected to the arc-shaped groove through the arc-shaped connecting part, and the pipe diameter simulation block is limited by the arc-shaped groove.

[0011] As described above, in a pipe diameter simulation loading device, the loading support is provided with a pipe diameter adjustment structure mounting position and an adjustment cylinder push rod mounting port. The adjustment cylinder push rod is connected to the pipe diameter simulation block through the adjustment cylinder push rod mounting port. The adjustment cylinder body is provided with a pipe diameter adjustment structure connection position. The adjustment cylinder body is connected to the pipe diameter adjustment structure mounting position through the pipe diameter adjustment structure connection position for limiting.

[0012] As described above, in a pipe diameter simulation loading device, the moving device is provided with a moving guide rail and a moving support base. The loading support base is connected to the moving support base, and the moving support base moves relative to the moving guide rail to drive the loading support base to move.

[0013] As described above, in a pipe diameter simulation loading device, the movable support base is provided with a movable connecting base and a loading support base mounting plate. The loading support base mounting plate is connected to both sides of the movable connecting base for connection and stabilization of the loading support base.

[0014] As described above, in a pipe diameter simulation loading device, the movable connecting seat is provided with a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod, and movable rollers, wherein the third connecting rod and the fourth connecting rod are arranged opposite to each other; the first connecting rod and the second connecting rod are connected opposite to each other on both sides of the third connecting rod and the fourth connecting rod, and form a loading support mounting opening for mounting the loading support; the movable rollers are respectively connected to the first connecting rod and the second connecting rod, and the movable connecting seat is moved by the movable rollers moving on the movable guide rail.

[0015] In the pipe diameter simulation loading device described above, the third connecting rod and the fourth connecting rod are U-shaped structures.

[0016] The beneficial effects of this utility model are as follows:

[0017] This solution employs an adjustable pipe diameter configuration, transforming the original single-mode pipe diameter simulation test into a multi-mode adjustable test. Multiple pipe diameter simulation structures are connected to a loading support to form a simulated pipe diameter test chamber. The diameter of the pipe to be expanded is simulated within this chamber. The expansion mold enters the chamber and expands, compressing the simulated pipe diameter structure to simulate the expansion process. Sensors, in conjunction with the simulated pipe diameter structure, collect actual working data from the expansion mold. The simulated pipe diameter structure includes a simulation section and an adjustment structure. The adjustment structure drives the simulation section to move radially relative to the loading support, adjusting the size of the simulated pipe diameter test chamber. This allows for the simulation of various pipe diameters for testing, saving testing materials and reducing testing costs. Furthermore, the modular design improves the ease of installation and maintenance of the pipe diameter simulation loading device, achieving the effects of increased convenience in expansion mold testing, reduced testing costs, and enhanced flexibility in real-time data testing of the expansion mold. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0020] Figure 2 For the corresponding Figure 1 A structural diagram from another direction;

[0021] Figure 3 For the corresponding Figure 2 A structural diagram from another direction;

[0022] Figure 4 For the corresponding Figure 3 AA section view;

[0023] Figure 5 For the corresponding Figure 4 Enlarged view of the structure of section B;

[0024] Figure 6 This is an exploded view of the structure of an embodiment of the present utility model;

[0025] Figure 7 For the corresponding Figure 6 A structural diagram from another direction;

[0026] Figure 8 For the corresponding Figure 7 Enlarged view of the C-section structure;

[0027] Figure 9 This is a schematic diagram of the structure of the load support body in an embodiment of this utility model;

[0028] Figure 10 This is a schematic diagram of the pipe diameter simulation block in an embodiment of the present invention.

[0029] In the diagram: 21-Loading device, 211-Loading support, 2111-Loading support limiting ring, 2112-Loading support body, 21121-Pipe diameter adjustment structure mounting position, 21122-Adjusting cylinder push rod mounting port, 212-Pipe diameter simulation structure, 2121-Pipe diameter simulation block, 21211-Arc-shaped part, 21212-Pipe diameter simulation part mounting position, 212121-Arc-shaped groove, 212122-Connecting limiting protrusion, 21213-First simulation part fastening hole, 21214-Second simulation part fastening hole, 21215-Third simulation part fastening hole, 21216-Pipe diameter simulation block limiting pin, 21217-First inclined plane 21218 - Second inclined plane; 2122 - Pipe diameter adjustment structure; 21221 - Adjusting cylinder body; 212211 - Pipe diameter adjustment structure connection position; 21222 - Adjusting cylinder push rod; 212221 - Arc-shaped connection part; 213 - Simulated pipe diameter test chamber; 221 - Moving guide rail; 222 - Moving support seat; 2221 - Moving connecting seat; 22211 - First connecting rod; 22212 - Second connecting rod; 22213 - Third connecting rod; 22214 - Fourth connecting rod; 22215 - Moving roller; 2222 - Loading support seat mounting plate; 22221 - Loading support seat limit port; 2223 - Loading support seat mounting port. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] like Figures 1 to 10 As shown, this utility model embodiment provides a pipe diameter simulation loading device, including:

[0032] A loading device 21 for simulating the diameter of a pipe to be expanded, and a moving device for moving the loading device 21; the loading device 21 includes a loading support 211 and a pipe diameter simulation structure 212, the loading support 211 being connected to the moving device for movement, and multiple pipe diameter simulation structures 212 being connected to the loading support 211 to form a simulated pipe diameter test chamber 213 for the expansion mold to enter; the pipe diameter simulation structure 212 includes a pipe diameter simulation block 2121 and a pipe diameter adjustment structure 2122, the pipe diameter simulation block 2121 being connected to the pipe diameter adjustment structure 2122; the pipe diameter adjustment structure... The structure 2122 drives the pipe diameter simulation block 2121 to move radially relative to the loading support 211. By adjusting the size of the simulated pipe diameter test chamber 213, different pipe diameters can be simulated. After the expansion mold enters the simulated pipe diameter test chamber, it expands and squeezes the pipe diameter simulation structure 212 to simulate the expansion process of the pipe to be expanded. In this way, the pipe diameter simulation structure 212, together with pressure, temperature, vibration sensors, etc., collects the actual working data of different expansion molds, so as to improve the convenience of expansion mold testing, save testing costs, and enhance the flexibility of real-time working data testing of expansion molds.

[0033] Specifically, multiple pipe diameter simulation structures 212 are connected at equal intervals in the circumferential direction of the loading support 211. This equidistant layout makes the internal space distribution of the simulated pipe diameter test chamber 213 more uniform, ensuring that the resistance experienced by the expansion mold and the uniformity of pipe diameter change in the circumferential direction can be effectively guaranteed during the pipe simulation test of the expansion mold. This can more realistically simulate the pipe diameter change state of the actual pipe to be expanded during the expansion process of the expansion mold, thereby improving the accuracy and reliability of the simulation test results and facilitating the improvement of the expansion mold. Moreover, the equidistant connection structure design allows maintenance personnel to easily disassemble and reinstall the corresponding structures without affecting the operation difficulty and maintenance efficiency due to the overly compact or irregular arrangement of the pipe diameter simulation structures 212. This reduces the maintenance cost of the pipe diameter simulation loading device and shortens the downtime, effectively improving the economic benefits of the pipe diameter simulation loading device. In this embodiment of the present invention, eight pipe diameter simulation structures 212 are preferably provided to improve the convenience of installation and the uniformity of force during the test.

[0034] Furthermore, the pipe diameter simulation block 2121 is provided with an arc-shaped portion 21211, a pipe diameter simulation portion mounting position 21212 for limiting the pipe diameter simulation block 2121, and a first simulation portion fastening hole 21213, a second simulation portion fastening hole 21214, a third simulation portion fastening hole 21215, and a pipe diameter simulation block limiting pin 21216 for fastening the pipe diameter simulation block 2121. The first simulation portion fastening hole 21213 and the second simulation portion fastening hole 21214 are... The pipe diameter simulation block 2121 has mounting positions 21212 on both sides and connected to the pipe diameter simulation part mounting positions 21212, and the diameter of the first simulation part fastening hole 21213 is larger than that of the second simulation part fastening hole 21214; the third simulation part fastening hole 21215 is connected to the first simulation part fastening hole 21213 to ensure that the pipe diameter simulation block limiting pin 21216 passes through the first simulation part fastening hole 21213 and abuts against the second simulation part fastening hole 2121. 4. The pipe diameter adjustment structure 2122 is fastened in the pipe diameter simulation part mounting position 21212, and the pipe diameter simulation block limiting pin 21216 is limited by the first threaded connector connected to the third simulation part fastening hole 21215 to prevent the pipe diameter simulation block limiting pin 21216 from moving laterally, thereby improving the safety of the pipe diameter simulation loading device. It also facilitates the replacement or maintenance of a single pipe diameter simulation structure 212, improving the maintainability of the pipe diameter simulation loading device and extending its service life. The pipe diameter simulation block 2121 is driven to move radially by the pipe diameter adjustment structure 2122, and the simulated pipe diameter test cavity 213 is formed by multiple arc-shaped parts 21211 to adjust the size of the simulated pipe diameter test cavity 213. Different simulated pipe diameter test cavities 213 can then simulate pipes of different diameters to be expanded, improving the convenience and accuracy of the pipe diameter simulation loading device test.

[0035] Preferably, the arc-shaped profile of the arc-shaped portion 21211 is easy to process and form, and can provide good structural strength to withstand the force of the expansion mold during expansion. Furthermore, by connecting multiple pipe diameter simulation structures 212 at equal intervals to the loading support base 211, the arc-shaped portion 21211 can be individually or uniformly adjusted by the pipe diameter adjustment structure 2122, thereby enhancing the roundness of the simulated pipe diameter and improving the accuracy of the test. In this embodiment, the pipe diameter simulation block 2121 is also provided with a first inclined plane 21217 and a second inclined plane 21218, and the first inclined plane 21217 is parallel to the adjacent second inclined plane 21218. This ensures that when the pipe diameter simulation loading device simulates the minimum pipe diameter, the adjacent first inclined plane 21217 and second inclined plane 21218 can fit tightly together, avoiding collisions between adjacent pipe diameter simulation structures 212 during use, improving the safety of the pipe diameter simulation loading device and extending its service life.

[0036] Furthermore, the pipe diameter adjustment structure 2122 includes an adjustment cylinder body 21221 and an adjustment cylinder push rod 21222. One end of the adjustment cylinder push rod 21222 is connected to the adjustment cylinder body 21221, and the other end is connected to the pipe diameter simulation mounting position 21212. The adjustment cylinder push rod 21222 is driven by the pipe diameter adjustment structure 2122 to drive the pipe diameter simulation block 2121 to move radially relative to the loading support 211, thereby adjusting the size of the simulated pipe diameter test chamber 213. The adjustment cylinder body 21221 is provided with an adjustment cylinder oil inlet and an adjustment cylinder oil outlet, which are connected to the adjustment cylinder oil inlet and outlet respectively via oil inlet pipes and oil outlet pipes. The oil outlet of the hydraulic cylinder is connected to the oil reservoir so that the size of the simulated pipe diameter test chamber 213 can be adjusted by adjusting the hydraulic input or output to drive the adjusting cylinder push rod 21222, thereby improving the accuracy of the pipe diameter simulation loading device test. In this embodiment of the invention, the adjusting cylinder body 21221 and the adjusting cylinder push rod 21222 are detachable, so that by replacing different adjusting cylinder push rods 21222 and pipe diameter simulation blocks 2121, the minimum size of the simulated pipe diameter test chamber 213 can be adjusted, thus expanding the application range of the pipe diameter simulation loading device. At the same time, the detachable structural design enhances the convenience of maintenance and installation of the pipe diameter adjustment structure 2122.

[0037] Furthermore, the pipe diameter simulation unit mounting position 21212 is provided with an arc-shaped groove 212121, and a connection limiting protrusion 212122 is provided in the arc-shaped groove 212121. The height of the connection limiting protrusion 212122 is less than the groove depth of the arc-shaped groove 212121, so as to enhance the connection stability of the pipe diameter simulation block 2121. The connection limiting protrusion 212122 is arranged opposite to each other on both sides of the arc-shaped groove 212121, and the connection limiting protrusion 212122 is provided with a connection limiting protrusion stabilizing hole communicating with the fastening hole 21213 of the first simulation unit. The adjusting cylinder push rod 21222 is provided with an arc-shaped connecting part 212221, the arc-shaped connecting part 212221 is provided with an adjusting cylinder push rod fastening hole and the adjusting cylinder push rod 21222 is provided with the connection limiting protrusion 2121. The limiting end face is parallel to the upper abutment surface of the 22, and the limiting end face is disposed on both sides of the arc-shaped connecting part 212221; the adjusting cylinder push rod 21222 is connected to the arc-shaped groove 212121 through the arc-shaped connecting part 212221, and is connected to the pipe diameter simulation block limiting pin 21216 in the first simulation part fastening hole 21213, the connecting limiting protrusion stabilizing hole, and the adjusting cylinder push rod fastening hole to fasten the adjusting cylinder push rod 21222 in the arc-shaped groove 212121, so as to limit the radial displacement of the pipe diameter simulation block 2121 during the adjustment process; the limiting end face abuts against the connecting limiting protrusion 212122 to limit the lateral displacement of the pipe diameter simulation block 2121 during the adjustment process, thereby improving the accuracy of the pipe diameter simulation loading device adjustment and making the measurement data more accurate.

[0038] Furthermore, the loading support 211 is provided with a pipe diameter adjustment structure mounting position 21121 and an adjustment cylinder push rod mounting port 21122. The adjustment cylinder push rod 21222 is connected to the pipe diameter simulation block 2121 through the adjustment cylinder push rod mounting port 21122. The adjustment cylinder body 21221 is provided with a pipe diameter adjustment structure connection position 212211. The adjustment cylinder body 21221 is connected to the pipe diameter adjustment structure mounting position 21121 through the pipe diameter adjustment structure connection position 212211 for limiting. The pipe diameter adjustment structure mounting position 21121 is provided with an adjustment cylinder abutment surface parallel to the connection end face of the adjustment cylinder body 21221 to ensure the stability of the pipe diameter adjustment structure 2122 connected to the loading support 211, thereby ensuring the stability during the test process.

[0039] Furthermore, the moving device is provided with a moving guide rail 221 and a moving support base 222. The loading support base 211 is connected to the moving support base 222, and the moving support base 222 moves relative to the moving guide rail 221 to drive the loading support base 211 to move, so that the simulated pipe diameter test chamber 213 can flexibly adjust its position according to different test requirements to simulate the working data of the expansion mold expanding the pipe to be expanded under different elongation states, thereby improving the accuracy of the test data and enhancing the adaptability and flexibility of the entire pipe diameter simulation loading device. At the same time, the pipe diameter simulation block 2121 has a symmetrical structural design, and the pipe diameter simulation block 2121 is also provided with an expansion mold positioning keyway for the positioning key of the expansion mold 3 to be installed, so that the expansion mold 3 abuts against the positioning key to start expansion.

[0040] Furthermore, the movable support 222 is provided with a movable connecting seat 2221 and a loading support mounting plate 2222. The loading support mounting plate 2222 is provided with a loading support limiting port 22221 and a loading support fastening hole. The loading support mounting plate 2222 is connected to both sides of the movable connecting seat 2221. The loading support 211 is also provided with a loading support limiting ring 2111 and a loading support body 2112. The pipe diameter adjustment structure mounting position 21121 and the adjusting cylinder push rod mounting port 2112 are also provided. 2. The loading support base body 2112 is provided to improve the stability of the pipe diameter adjustment structure 2122 connected to the loading support base 211; the loading support base limiting ring 2111 is provided with a loading support base stabilizing hole, and the loading support base limiting ring 2111 is connected to the loading support base body 2112; in this embodiment of the present invention, the loading support base limiting ring 2111 is connected to the loading support base body 2112 by welding process to prevent the loading support base limiting ring 2111 from moving laterally, thereby increasing the stability of the pipe diameter adjustment structure 2122 connected to the loading support base 2112. The loading support 211 is designed to enhance its structural stability. The loading support 2111 is positioned at a distance from both ends of the loading support body 2112, allowing it to engage with the loading support mounting plates 22222 on both sides via the loading support body 2112. The loading support 211 is then secured to the movable support 222 via second threaded fasteners connected to the fastening holes and stabilizing holes of the loading support, thereby enhancing the structural stability of the pipe diameter simulation loading device. In this embodiment, the loading support body 2112 is preferably designed as a circular pipe structure, and the loading support 211 is preferably designed as an arc-shaped opening. This design effectively restricts the left-right movement of the loading support 211 after the loading support body 2112 engages with the arc-shaped opening, and further restricts its forward-backward and vertical movement via the second threaded fasteners, effectively enhancing the stability of the pipe diameter simulation loading device during testing.

[0041] Furthermore, the movable connecting seat 2221 is provided with a first connecting rod 22211, a second connecting rod 22212, a third connecting rod 22213, a fourth connecting rod 22214, and a movable roller 22215, wherein the third connecting rod 22213 and the fourth connecting rod 22214 are arranged opposite to each other; the first connecting rod 22211 and the second connecting rod 22212 are connected opposite to each other on both sides of the third connecting rod 22213 and the fourth connecting rod 22214, and form a loading support mounting port 2223 for mounting the loading support seat 211, so that multiple pipe diameter simulation structures 212, which are equidistantly connected along the circumference of the loading support seat 211, are located on the loading support. The pipe diameter simulation structure 212, which is located at the lower end of the seat 211 and interferes with the movable connecting seat 2221, can extend into the loading support seat mounting port 2223 to reduce the friction of the movable connecting seat 2221 on the pipe diameter simulation structure 212 and extend the service life of the pipe diameter simulation loading device. The movable rollers 22215 are respectively connected to the first connecting rod 22211 and the second connecting rod 22212, and the movable connecting seat 2221 is moved by the movement of the movable rollers 22215 on the movable guide rail 221, thereby reducing the resistance of the movable connecting seat 2221 when it moves on the movable guide rail 221, and thus improving the convenience of moving and adjusting the loading device 21.

[0042] In this embodiment of the utility model, the movable connecting seat 2221 is provided with a first connecting rod 22211, a second connecting rod 22212, a third connecting rod 22213, and a fourth connecting rod 22214, which are preferably fastened together by welding. The loading support seat mounting plate 2222, which is arranged opposite to each other, is respectively welded to the first connecting rod 22211, the second connecting rod, the third connecting rod 22213 and the first connecting rod 22211, the second connecting rod, and the fourth connecting rod 22214, so as to enhance the support stability of the loading support seat mounting plate 2222 on the loading support seat 211.

[0043] Furthermore, the third connecting rod 22213 and the fourth connecting rod 22214 are designed with a U-shape. This U-shape significantly enhances the overall strength and stability of the movable connecting seat 2221, enabling it to effectively distribute and bear the weight from the loading support seat 211 and various forces generated during the movement of the pipe diameter simulation loading device, reducing the risk of deformation of each connecting rod under stress. Simultaneously, the U-shape design provides a more spacious area for the loading support seat mounting port 2223, facilitating the installation of the loading support seat 211. On the other hand, the U-shape design significantly increases the welding area of ​​the third connecting rod 22213 and the fourth connecting rod 22214 to the first connecting rod 22211, the second connecting rod 22212, and the loading support seat mounting plate 2222, respectively. This improves both the stability and ease of welding the movable connecting seat 2221.

[0044] It should be understood that the terms "first," "second," etc., are used in this utility model to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this utility model, "first" information can also be referred to as "second" information, and similarly, "second" information can also be referred to as "first" information. In addition, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0045] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A pipe diameter simulation loading device, characterized in that, include: A loading device (21) for simulating the diameter of the pipe to be expanded, and a moving device for moving the loading device (21); The loading device (21) includes a loading support (211) and a pipe diameter simulation structure (212). The loading support (211) is connected to the moving device for movement. Multiple pipe diameter simulation structures (212) are connected to the loading support (211) to form a simulated pipe diameter test chamber (213) for the expansion mold to enter. The pipe diameter simulation structure (212) includes a pipe diameter simulation block (2121) and a pipe diameter adjustment structure (2122). The pipe diameter simulation block (2121) is connected to the pipe diameter adjustment structure (2122). The pipe diameter adjustment structure (2122) drives the pipe diameter simulation block (2121) to move radially relative to the loading support (211). Different pipe diameters are simulated by adjusting the size of the simulated pipe diameter test chamber (213).

2. The pipe diameter simulation loading device according to claim 1, characterized in that, Multiple of the aforementioned pipe diameter simulation structures (212) are equidistantly connected to the loading support (211).

3. The pipe diameter simulation loading device according to claim 1, characterized in that, The pipe diameter simulation block (2121) is provided with an arc-shaped part (21211) and a pipe diameter simulation part mounting position (21212) for limiting the pipe diameter simulation block (2121); the pipe diameter adjustment structure (2122) is connected to the pipe diameter simulation part mounting position (21212), driving the pipe diameter simulation block (2121) to move radially and forming the simulated pipe diameter test cavity (213) by surrounding multiple arc-shaped parts (21211).

4. The pipe diameter simulation loading device according to claim 3, characterized in that, The pipe diameter adjustment structure (2122) is provided with an adjustment cylinder body (21221) and an adjustment cylinder push rod (21222). One end of the adjustment cylinder push rod (21222) is connected to the adjustment cylinder body (21221), and the other end is connected to the pipe diameter simulation part mounting position (21212). The adjustment cylinder push rod (21222) is driven by the pipe diameter adjustment structure (2122) to drive the pipe diameter simulation block (2121) to move radially relative to the loading support seat (211).

5. The pipe diameter simulation loading device according to claim 4, characterized in that, The pipe diameter simulation unit mounting position (21212) is provided with an arc-shaped groove (212121), and the adjusting cylinder push rod (21222) is provided with an arc-shaped connecting part (212221). The adjusting cylinder push rod (21222) is connected to the arc-shaped groove (212121) through the arc-shaped connecting part (212221), and the pipe diameter simulation block (2121) is limited by the arc-shaped groove (212121).

6. The pipe diameter simulation loading device according to claim 5, characterized in that, The loading support (211) is provided with a pipe diameter adjustment structure mounting position (21121) and an adjustment cylinder push rod mounting port (21122). The adjustment cylinder push rod (21222) is connected to the pipe diameter simulation block (2121) through the adjustment cylinder push rod mounting port (21122). The adjustment cylinder body (21221) is provided with a pipe diameter adjustment structure connection position (212211). The adjustment cylinder body (21221) is connected to the pipe diameter adjustment structure mounting position (21121) through the pipe diameter adjustment structure connection position (212211) for limiting.

7. The pipe diameter simulation loading device according to claim 1, characterized in that, The mobile device is provided with a mobile guide rail (221) and a mobile support base (222). The loading support base (211) is connected to the mobile support base (222), and the loading support base (211) is moved relative to the mobile guide rail (221) by the movement of the mobile support base (222).

8. The pipe diameter simulation loading device according to claim 7, characterized in that, The movable support base (222) is provided with a movable connecting base (2221) and a loading support base mounting plate (2222). The loading support base mounting plate (2222) is connected to both sides of the movable connecting base (2221) for connection and stabilization of the loading support base (211).

9. The pipe diameter simulation loading device according to claim 8, characterized in that, The movable connecting seat (2221) is provided with a first connecting rod (22211), a second connecting rod (22212), a third connecting rod (22213), a fourth connecting rod (22214), and a movable roller (22215). The third connecting rod (22213) and the fourth connecting rod (22214) are arranged opposite to each other. The first connecting rod (22211) and the second connecting rod (22212) are connected opposite to each other on both sides of the third connecting rod (22213) and the fourth connecting rod (22214), and form a loading support mounting port (2223) for the loading support seat (211) to be installed. The movable roller (22215) is connected to the first connecting rod (22211) and the second connecting rod (22212) respectively, and the movable connecting seat (2221) is moved by the movable roller (22215) moving on the movable guide rail (221).

10. A pipe diameter simulation loading device according to claim 9, characterized in that, The third connecting rod (22213) and the fourth connecting rod (22214) are U-shaped structures.

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