Multi-modal mechanical property testing device for expanding mill

Abstract

The invention discloses a multi-modal mechanical property testing device for a diameter expanding machine. The device comprises a diameter expanding simulator and a simulation loading device, the analog loading device comprises a loading device and a moving device; the expanding mold is connected to the expanding simulator, the loading device comprises a loading supporting seat and pipe diameter simulation structures, the loading supporting seat is connected to the moving device to move, and the multiple pipe diameter simulation structures are connected to the loading supporting seat to form a simulation pipe diameter test cavity for the expanding mold to enter; the pipe diameter simulation structure comprises a pipe diameter simulation block and a pipe diameter adjusting structure, and 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 in the radial direction relative to the loading supporting seat, and the diameter expanding mold is used for testing by adjusting the size of the simulation pipe diameter testing cavity. According to the scheme, the structural arrangement of an adjustable pipe diameter mode is adopted, and the effects of improving the convenience of diameter expanding mold testing, saving the testing cost and enhancing the flexibility of real-time working data testing of the diameter expanding mold are achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of pipeline testing equipment, and particularly relates to a multi-modal mechanical property testing device for an expanding machine. Background Art

[0002] After years of research and development of pipe-making molds and equipment, especially in the aspect of expanding molds and equipment, rich production and application experience has been accumulated.

[0003] However, in actual production, the monitoring of the production line mainly relies on the oral reports of on-site operators or directly observing the use of the expanding mold and the expanding cutter head, mainly focusing on the external use performance of the expanding mold, lacking comprehensive automated monitoring means for the expanding mold and the expanding cutter head, resulting in a lack of in-depth understanding of the key mechanical property parameters of the expanding mold and the expanding cutter head during use, which is not conducive to providing data support and theoretical basis for the manufacturing, research and development, and improvement of products. Therefore, the present invention proposes a new solution to the above technical problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a multi-modal mechanical property testing device for an expanding machine, which adopts a structure with an adjustable pipe diameter mode, achieving the effects of improving the convenience of expanding mold testing, saving testing costs, and enhancing the flexibility of real-time working data testing of the expanding mold.

[0005] Based on this, the present invention provides a multi-modal mechanical property testing device for an expanding machine, including: An expanding simulation machine for connecting an expanding mold, and a simulation loading device for simulating the pipe diameter of a pipeline to be expanded; the simulation loading device includes a loading device for simulating the pipe diameter of the pipeline to be expanded and a moving device for moving the loading device; the expanding mold is connected to the expanding simulation machine, the loading device includes a loading support base and a pipe diameter simulation structure, the loading support base is connected to the moving device for movement, and a plurality of the pipe diameter simulation structures are connected to the loading support base to form a simulated pipe diameter test cavity for the expanding mold to enter; the pipe diameter simulation structure includes a pipe diameter simulation block and a pipe diameter adjustment structure, and 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 base, and adjusts the size of the simulated pipe diameter test cavity to test the expanding mold.

[0006] For the multi-modal mechanical property testing device for an expanding machine as described above, a plurality of the pipe diameter simulation structures are connected to the loading support base at equal intervals.

[0007] The multi-modal mechanical property testing device for an expanding machine as described above, wherein the pipe diameter simulation block is provided with an arc portion and a pipe diameter simulation portion installation position for limiting the pipe diameter simulation block; the pipe diameter adjustment structure is connected to the pipe diameter simulation portion installation position, drives the pipe diameter simulation block to move radially, and forms the simulated pipe diameter test cavity by surrounding with a plurality of the arc portions.

[0008] The multi-modal mechanical property testing device for an expanding machine as described above, wherein the pipe diameter adjustment structure is provided with a secondary adjustment oil cylinder body and an adjustment oil cylinder push rod; one end of the adjustment oil cylinder push rod is connected to the secondary adjustment oil cylinder body, and the other end is connected to the pipe diameter simulation portion installation position, and the adjustment oil 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 seat.

[0009] The multi-modal mechanical property testing device for an expanding machine as described above, wherein the pipe diameter simulation portion installation position is provided with an arc-shaped groove, the adjustment oil cylinder push rod is provided with an arc-shaped connecting portion, and the adjustment oil cylinder push rod is connected in the arc-shaped groove through the arc-shaped connecting portion, and the pipe diameter simulation block is limited by the arc-shaped groove.

[0010] The multi-modal mechanical property testing device for an expanding machine as described above, wherein the moving device is provided with a moving guide rail and a moving support seat, the loading support seat is connected to the moving support seat, and the loading support seat is driven to displace by moving relative to the moving guide rail through the moving support seat.

[0011] The multi-modal mechanical property testing device for an expanding machine as described above, wherein the expanding simulation machine includes an expanding simulation machine base, a main adjustment structure for adjusting the expanding die, and a rotating structure for connecting the expanding die, and the main adjustment structure is connected to the expanding simulation machine base; the rotating structure is connected to the main adjustment structure and is connected to the other side of the expanding simulation machine base relative to the main adjustment structure; The rotating structure includes a power structure and a rotating connecting member, the rotating connecting member is connected to the expanding simulation machine base and is for connecting the expanding die, and the main adjustment structure is limited through the rotating connecting member and adjusts the expanding die; the power structure is connected to the rotating connecting member and drives the rotating connecting member to rotate to install or disassemble the expanding die.

[0012] The multi-modal mechanical property testing device for an expanding machine as described above, wherein the rotating structure further includes a rotating gear, the rotating gear is connected to the rotating connecting member, and the rotating connecting member is driven to rotate by connecting the power structure with the rotating gear; The rotating connecting member is provided with a rotating connecting member body and a rotating connection limiting member. The rotating gear is connected to one end of the rotating connecting member body, and the diameter-expanding die is connected to the other end of the rotating connecting member body relative to the rotating gear. The main adjustment structure is connected inside the rotating connecting member body and is limited by the rotating connection limiting member.

[0013] For the diameter-expanding machine multi-modal mechanical property testing device as described above, the main adjustment structure is provided with a main adjustment oil cylinder, a pull rod shaft, and a telescopic connecting member. The main adjustment oil cylinder is connected to the base of the diameter-expanding simulation machine. The pull rod shaft is connected to the main adjustment oil cylinder through the telescopic connecting member, and the main adjustment oil cylinder drives the pull rod shaft to move relatively inside the rotating connecting member body.

[0014] For the diameter-expanding machine multi-modal mechanical property testing device as described above, the base of the diameter-expanding simulation machine is provided with a support seat, a first frame vertical plate, a second frame vertical plate, and a third frame vertical plate. The first frame vertical plate and the third frame vertical plate are oppositely connected to both sides of the support seat, and the second frame vertical plate is arranged between the first frame vertical plate and the third frame vertical plate. The main adjustment structure is connected to the first frame vertical plate and the second frame vertical plate. One end of the rotating connecting member is connected to the second frame vertical plate, and the other end is connected to the third frame vertical plate. The power structure is connected to the support seat and is rotationally connected to the rotating connecting member.

[0015] The beneficial effects of the present invention are as follows: 1. This solution adopts a structural setting with an adjustable pipe diameter mode, converting the original manual visual inspection into equipment testing with an adjustable pipe diameter. By connecting multiple pipe diameter simulation structures to the loading support seat to form a simulated pipe diameter test chamber, the pipe diameter of the pipe to be expanded is simulated through the simulated pipe diameter test chamber. After the diameter-expanding die connected to the diameter-expanding simulation machine enters the simulated pipe diameter test chamber, the diameter-expanding die expands and extrudes the pipe diameter simulation structure to simulate the expansion process of the pipe to be expanded. Thus, the actual working data of the diameter-expanding die is collected through the cooperation of the pipe diameter simulation structure and the sensor. Moreover, since the pipe diameter simulation structure is provided with a pipe diameter simulation part and a pipe diameter adjustment structure, the pipe diameter adjustment structure drives the pipe diameter simulation part to move radially relative to the loading support seat to adjust the size of the simulated pipe diameter test chamber, thereby realizing the simulation of the pipe diameters of multiple pipes to be expanded for different diameter-expanding dies to conduct tests, facilitating the saving of test materials and the reduction of test costs. At the same time, through modular design, the convenience of installation and maintenance of the simulation loading device is improved, achieving the effects of enhancing the convenience of diameter-expanding die testing, saving test costs, and increasing the flexibility of real-time working data testing of the diameter-expanding die. Description of the Drawings

[0016] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0017] Figure 1 Structural schematic diagram of an embodiment of the present invention; Figure 2 Structural schematic diagram of the simulation loading device in an embodiment of the present invention; Figure 3 For corresponding Figure 2 Structural schematic diagram in another direction; Figure 4 For corresponding Figure 3 Structural schematic diagram in another direction; Figure 5 For corresponding Figure 4 A - A cross-sectional view; Figure 6 For corresponding Figure 5 Enlarged view of part B structure; Figure 7 Exploded view of the structure of the simulation loading device in an embodiment of the present invention; Figure 8 For corresponding Figure 7 Structural schematic diagram in another direction; Figure 9 For corresponding Figure 8 Enlarged view of part C structure; Figure 10 Structural schematic diagram of the loading support seat body in an embodiment of the present invention; Figure 11 Structural schematic diagram of the pipe diameter simulation block in an embodiment of the present invention; Figure 12 Structural schematic diagram of the diameter expansion simulation machine in an embodiment of the present invention; Figure 13 For corresponding Figure 12 Structural schematic diagram in another direction; Figure 14 For corresponding Figure 13 Structural schematic diagram in another direction; Figure 15 For corresponding Figure 14 D - D cross-sectional view; Figure 16 For corresponding Figure 15 Enlarged view of part E structure; Figure 17 For corresponding Figure 15 Enlarged view of part F structure; Figure 18Exploded view of the structure of the diameter-expanding simulator according to an embodiment of the present invention; Figure 19 For corresponding Figure 18 Schematic diagram of the structure in another direction; Figure 20 For corresponding Figure 19 Schematic diagram of the structure in another direction; Figure 21 For corresponding Figure 20 Enlarged view of the structure of part G; Figure 22 Schematic diagram of the structure of the diameter-expanding die installed on the diameter-expanding simulator according to an embodiment of the present invention; Figure 23 Schematic diagram of the structure of the diameter-expanding die according to an embodiment of the present invention; Figure 24 For corresponding Figure 23 Enlarged view of the structure of part H.

[0018] In the figure: 1 - Diameter-expanding simulator, 11 - Base of the diameter-expanding simulator, 111 - Support base of the bracket, 1111 - Installation position for anchor bolts, 112 - First vertical plate of the frame, 113 - Second vertical plate of the frame, 1131 - Rotating connection fastener, 1132 - First lubrication hole, 1133 - Installation hole for the rotating connection fastener, 114 - Third vertical plate of the frame, 1141 - Upper connecting plate, 1142 - Lower connecting plate, 1143 - Second lubrication hole, 1144 - Rotating part lubrication sleeve, 115 - Frame support column; 12 - Main adjustment structure, 121 - Main adjustment oil cylinder, 1211 - Body of the main adjustment oil cylinder, 1212 - Piston rod of the main adjustment oil cylinder, 122 - Tie rod shaft, 1221 - Limiting part of the tie rod shaft, 1222 - First connecting end of the tie rod shaft, 1223 - Second connecting end of the tie rod shaft, 123 - Telescopic connecting piece, 1231 - Upper cover of the telescopic connecting piece, 1232 - Lower cover of the telescopic connecting piece; 131 - Power structure, 1311 - Power output gear, 132 - Rotating connecting piece, 1321 - Body of the rotating connecting piece, 13211 - Installation cavity for the adjustment structure, 13212 - Installation position for the connecting limiting piece, 13213 - Installation part for the rotating gear, 13214 - Limiting end of the rotating gear, 13215 - Installation part for the diameter-expanding die, 1322 - Rotating connection limiting piece, 13221 - Limiting connection slider, 1323 - First connecting sleeve, 1324 - Second connecting sleeve, 133 - Rotating gear, 1331 - Installation hole of the rotating gear; 2 - Simulation loading device, 21 - Loading device, 211 - Loading support base, 2111 - Limiting ring of the loading support base, 2112 - Body of the loading support base, 21121 - Installation position for the pipe diameter adjustment structure, 21122 - Installation opening for the push rod of the adjustment oil cylinder, 212 - Pipe diameter simulation structure, 2121 - Pipe diameter simulation block, 21211 - Arc part, 21212 - Installation position for the pipe diameter simulation part, 212121 - Arc-shaped groove, 212122 - Connecting limiting protrusion, 21213 - First fastening hole for the simulation part, 21214 - Second fastening hole for the simulation part, 21215 - Third fastening hole for the simulation part, 21216 - Limiting pin of the pipe diameter simulation block, 21217 - First inclined plane, 21218 - Second inclined plane, 2122 - Pipe diameter adjustment structure, 21221 - Body of the auxiliary adjustment oil cylinder, 212211 - Connection position of the pipe diameter adjustment structure, 21222 - Push rod of the adjustment oil cylinder, 212221 - Arc-shaped connecting part, 213 - Simulation pipe diameter test cavity; 221 - Moving guide rail, 222 - Moving support base, 2221 - Moving connection seat, 22211 - First connecting rod, 22212 - Second connecting rod, 22213 - Third connecting rod, 22214 - Fourth connecting rod, 22215 - Moving roller, 2222 - Installation plate of the loading support base, 22221 - Limiting opening of the loading support base, 2223 - Installation opening of the loading support base;3-Expansion diameter die, 31-Telescopic connection structure, 311-First telescopic connection sleeve, 3111-Rod shaft mounting hole, 3112-Telescopic connection sleeve positioning protrusion, 312-Second telescopic connection sleeve, 32-Expansion diameter tool structure, 321-Expansion diameter tool head support seat, 3211-Expansion diameter tool head limit card slot, 322-Expansion diameter tool head, 3221-Expansion diameter tool head body, 32211-First expansion diameter tool head limit end, 32212-Expansion diameter tool head inclined end, 32213-Expansion diameter tool head flat end, 3222-Expansion diameter tool head guide block, 3223-Expansion diameter tool head guide plate, 33-Expansion diameter adjustment structure, 331-Expansion guide part, 3311-Expansion guide groove, 332-Expansion abutting part.; Specific embodiments

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0020] As Figures 1 to 24 shown, the multi-modal mechanical property test device for an expansion machine provided by the embodiment of the present invention includes: An expansion simulation machine 1 for connecting the expansion diameter die 3, and a simulation loading device 2 for simulating the diameter of the pipeline to be expanded; the simulation loading device 2 includes a loading device 21 for simulating the diameter of the pipeline to be expanded and a moving device for moving the loading device 21; the expansion diameter die 3 is connected to the expansion simulation machine 1, the loading device 21 includes a loading support seat 211 and a pipe diameter simulation structure 212, the loading support seat 211 is connected to the moving device for movement, and a plurality of the pipe diameter simulation structures 212 are connected to the loading support seat 211 to form a simulated pipe diameter test cavity 213 for the expansion diameter die 3 to enter; the pipe diameter simulation structure 212 includes a pipe diameter simulation block 2121 and a pipe diameter adjustment structure 2122, and 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 seat 211, and by adjusting the size of the simulated pipe diameter test cavity 213, different pipe diameters are simulated. After the expansion diameter die 3 enters the simulated pipe diameter test cavity 213, the expansion of the expansion diameter die 3 is used to squeeze the pipe diameter simulation structure 212 to simulate the expansion process of the pipeline to be expanded. Thus, the actual working data of different expansion diameter dies are collected through the cooperation of the pipe diameter simulation structure 212 with pressure, temperature, vibration sensors, etc., so as to improve the convenience of the expansion diameter die test, save the test cost, and enhance the flexibility of the real-time working data test of the expansion diameter die 3.

[0021] Specifically, a plurality of the pipe diameter simulation structures 212 are connected at equal intervals in the circumferential direction of the loading support base 211. This layout with equal intervals makes the internal space distribution of the simulated pipe diameter test chamber 213 more uniform, ensuring that when conducting pipe simulation tests, the resistance received by the expanding die 3 and the uniformity of the pipe diameter change in the circumferential direction can be effectively guaranteed, and the change state of the pipe diameter during the expansion process of the actual pipe to be expanded with the expanding die can be more realistically simulated, thereby improving the accuracy and reliability of the simulation test results and facilitating the improvement of the expanding die; moreover, the structural design with equal interval connection enables maintenance personnel to conveniently disassemble and reinstall the corresponding structures without affecting the operation difficulty and maintenance efficiency due to overly compact or irregular arrangements between the pipe diameter simulation structures 212, thus reducing the maintenance cost of the simulation loading device 2 and shortening the downtime, effectively improving the economic benefits of the simulation loading device 2; in the embodiment of the present invention, the pipe diameter simulation structure 212 is preferably provided with 8 to improve the installation convenience and the force uniformity during the test process.

[0022] Furthermore, the pipe diameter simulation block 2121 is provided with an arc portion 21211, a pipe diameter simulation portion installation position 21212 for limiting the pipe diameter simulation block 2121, and first simulation portion fastening holes 21213, second simulation portion fastening holes 21214, third simulation portion fastening holes 21215, and a pipe diameter simulation block limit pin 21216 for fastening the pipe diameter simulation block 2121. The first simulation portion fastening holes 21213 and the second simulation portion fastening holes 21214 are relatively arranged on both sides of the pipe diameter simulation block 2121 and communicate with the pipe diameter simulation portion installation position 21212, and the aperture of the first simulation portion fastening hole 21213 is larger than that of the second simulation portion fastening hole 21214; the third simulation portion fastening hole 21215 communicates with the first simulation portion fastening hole 21213 to ensure that the pipe diameter adjustment structure 2122 is fastened in the pipe diameter simulation portion installation position 21212 by passing the pipe diameter simulation block limit pin 21216 through the first simulation portion fastening hole 21213 and abutting against the second simulation portion fastening hole 21214, and the pipe diameter simulation block limit pin 21216 is limited by connecting a first threaded connector to the third simulation portion fastening hole 21215 to prevent the pipe diameter simulation block limit pin 21216 from moving laterally, improving the use safety of the simulation loading device 2. At the same time, it is also convenient to replace or repair a single pipe diameter simulation structure 212, improving the maintainability of the simulation loading device 2 and extending the service life of the simulation loading device 2; the pipe diameter simulation block 2121 is driven by the pipe diameter adjustment structure 2122 to move radially, and a plurality of the arc portions 21211 surround to form the simulation pipe diameter test cavity 213 to adjust the size of the simulation pipe diameter test cavity 213, and then different diameters of pipes to be expanded are simulated through different simulation pipe diameter test cavities 213, improving the convenience and accuracy of the test of the simulation loading device 2.

[0023] Preferably, the arc contour of the arc portion 21211 is convenient for processing and forming, and can provide better structural strength to withstand the acting force during the expansion of the expanding die 3. Moreover, through a plurality of the pipe diameter simulation structures 212 being connected at equal intervals on the loading support base 211, the arc portion 21211 can be adjusted individually or uniformly through the pipe diameter adjustment structure 2122, so as to enhance the roundness of the pipe diameter simulated by the pipe diameter simulation structure 212 for the pipe to be expanded and improve the accuracy of the test. In the embodiment of the present invention, the pipe diameter simulation block 2121 is further 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, so as to ensure that when the simulation loading device 2 simulates the minimum pipe diameter, the adjacent first inclined plane 21217 and second inclined plane 21218 can be closely attached to avoid collision between two adjacent pipe diameter simulation structures 212 during use, improve the use safety of the simulation loading device 2 and extend the service life of the simulation loading device 2.

[0024] Furthermore, the pipe diameter adjustment structure 2122 is provided with a secondary adjustment oil cylinder body 21221 and an adjustment oil cylinder push rod 21222. One end of the adjustment oil cylinder push rod 21222 is connected to the secondary adjustment oil cylinder body 21221, and the other end is connected to the pipe diameter simulation part installation position 21212. By driving the adjustment oil cylinder push rod 21222 through the pipe diameter adjustment structure 2122, the pipe diameter simulation block 2121 is driven to move radially relative to the loading support base 211, thereby adjusting the size of the simulated pipe diameter test cavity 213. The secondary adjustment oil cylinder body 21221 is provided with an adjustment oil cylinder oil inlet hole and an adjustment oil cylinder oil outlet hole, which are respectively connected to the adjustment oil cylinder oil inlet hole and the adjustment oil cylinder oil outlet hole through an oil inlet pipe and an oil outlet pipe and are connected to an oil storage tank, so as to drive the adjustment oil cylinder push rod 21222 to adjust the size of the simulated pipe diameter test cavity 213 by adjusting the input or output amount of hydraulic pressure, so as to improve the accuracy of the test of the simulation loading device 2. In the embodiment of the present invention, the secondary adjustment oil cylinder body 21221 and the adjustment oil cylinder push rod 21222 are designed with a detachable structure, so as to adjust the minimum simulated pipe diameter test cavity 213 by replacing different adjustment oil cylinder push rods 21222 and pipe diameter simulation blocks 2121, expanding the use range of the simulation loading device 2. At the same time, through the detachable structure design, the convenience of maintenance and installation of the pipe diameter adjustment structure 2122 is enhanced.

[0025] Furthermore, an arc-shaped groove 212121 is provided at the installation position 21212 of the pipe diameter simulation part. A connecting limit projection 212122 is provided in the arc-shaped groove 212121. The height of the connecting limit projection 212122 is less than the groove depth of the arc-shaped groove 212121 to enhance the connection stability of the pipe diameter simulation block 2121. The connecting limit projections 212122 are relatively arranged on both sides of the arc-shaped groove 212121, and a connecting limit projection stabilizing hole communicating with the first simulation part fastening hole 21213 is provided on the connecting limit projection 212122. The adjusting oil cylinder push rod 21222 is provided with an arc-shaped connecting part 212221. The arc-shaped connecting part 212221 is provided with an adjusting oil cylinder push rod fastening hole and a limiting end face parallel to the abutting surface on the connecting limit projection 212122 of the adjusting oil cylinder push rod 21222. The limiting end faces are relatively arranged on both sides of the arc-shaped connecting part 212221. The adjusting oil cylinder push rod 21222 is connected in the arc-shaped groove 212121 through the arc-shaped connecting part 212221, and is fastened in the arc-shaped groove 212121 through the pipe diameter simulation block limit pin 21216 in the first simulation part fastening hole 21213, the connecting limit projection stabilizing hole, and the adjusting oil cylinder push rod fastening hole to limit the radial offset of the pipe diameter simulation block 2121 during the adjustment process. The limiting end face abuts against the connecting limit projection 212122 to limit the lateral offset of the pipe diameter simulation block 2121 during the adjustment process, thereby improving the accuracy of the adjustment of the simulation loading device 2 and making the measurement data more accurate.

[0026] In the embodiment of the present invention, the loading support base 211 is provided with a pipe diameter adjustment structure installation position 21121 and an adjusting oil cylinder push rod installation port 21122. The adjusting oil cylinder push rod 21222 is connected to the pipe diameter simulation block 2121 through the adjusting oil cylinder push rod installation port 21122. The secondary adjusting oil cylinder body 21221 is provided with a pipe diameter adjustment structure connection position 212211. The secondary adjusting oil cylinder body 21221 is connected to the pipe diameter adjustment structure installation position 21121 through the pipe diameter adjustment structure connection position 212211 for positioning, and the pipe diameter adjustment structure installation position 21121 is provided with an adjusting oil cylinder abutting surface parallel to the connection end face of the secondary adjusting oil cylinder body 21221 to ensure the stability of the connection of the pipe diameter adjustment structure 2122 to the loading support base 211, and further ensure the stability during the test process.

[0027] Furthermore, the mobile device is provided with a mobile guide rail 221 and a mobile support seat 222. The loading support seat 211 is connected to the mobile support seat 222, and the mobile support seat 222 drives the loading support seat 211 to displace by moving relative to the mobile guide rail 221, so that the simulated pipe diameter test cavity 213 can be flexibly adjusted according to different test requirements to simulate the working data of the expanding die expanding the pipe to be expanded in different elongation states, thereby improving the accuracy of the test data and enhancing the adaptability and flexibility of the entire simulation loading device 2. 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 expanding die positioning key groove for installing the positioning key of the expanding die 3, so that the expanding die 3 abuts against the positioning key to start expanding.

[0028] In the embodiment of the present invention, the movable support base 222 is provided with a movable connection base 2221 and a loading support base mounting plate 2222. The loading support base mounting plate 2222 is provided with a loading support base limiting port 22221 and a loading support base fastening hole. The loading support base mounting plate 2222 is oppositely connected to both sides of the movable connection base 2221; the loading support base 211 is further provided with a loading support base limiting ring 2111 and a loading support base body 2112. The pipe diameter adjusting structure mounting position 21121 and the adjusting oil cylinder push rod mounting port 21122 are arranged on the loading support base body 2112 to improve the stability of the connection between the pipe diameter adjusting structure 2122 and 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 oppositely connected to the loading support base body 2112; preferably, the loading support base limiting ring 2111 is connected to the loading support base body 2112 by a welding process to prevent the loading support base limiting ring 2111 from moving laterally and enhance the support stability of the loading support base 211; the installation position of the loading support base limiting ring 2111 is at a certain distance from both ends of the loading support base body 2112, so that both ends of the loading support base body 2112 are inserted into the loading support base limiting port 22221 of the loading support base mounting plates 2222 arranged on both sides, and the loading support base 211 is fastened to the movable support base 222 by connecting with a second threaded fastener in the loading support base fastening hole and the loading support base stabilizing hole to enhance the structural stability of the simulation loading device 2; in the embodiment of the present invention, the loading support base body 2112 is preferably designed as a circular pipe structure, and the loading support base limiting port 22221 is preferably designed as an arc-shaped opening, so that after the loading support base body 2112 is inserted into the arc-shaped opening, the left and right movement of the loading support base 211 can be effectively restricted, and the front and back movement and up and down movement of the loading support base 211 are restricted by the connection of the second threaded fastener, effectively enhancing the stability of the simulation loading device 2 during the test.

[0029] In the embodiment of the present invention, 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 relatively connected to the third connecting rod 22213 and the fourth connecting rod 22214 on both sides, and are surrounded by a loading support seat mounting opening 2223 for mounting the loading support seat 211, so as to facilitate the plurality of pipe diameter simulation structures 212 connected at equal intervals along the circumference of the loading support seat 211, which are located on the loading support seat. The pipe diameter simulation structure 212 at the lower end of the support seat 211 and interfering with the movable connecting seat 2221 can extend into the loading support seat installation 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 simulated loading device 2; the moving roller 22215 is respectively connected to the first connecting rod 22211 and the second connecting rod 22212, and the moving roller 22215 moves on the movable guide rail 221 to drive the movable connecting seat 2221 to move, thereby reducing the resistance of the movable connecting seat 2221 when moving on the movable guide rail 221, thereby improving the convenience of movement and adjustment of the loading device 21.

[0030] Preferably, the third connecting rod 22213 and the fourth connecting rod 22214 are of U-shaped structure design. By adopting the U-shaped structure design, the overall strength and stability of the mobile connecting seat 2221 are significantly enhanced, so that the mobile connecting seat 2221 can effectively disperse and bear the weight from the loading support seat 211 and various forces generated during the movement of the simulated loading device 2, thereby reducing the risk of deformation of each connecting rod when subjected to force; at the same time, the U-shaped structure design also provides a more spacious space for the loading support seat mounting port 2223, thereby facilitating the improvement of the convenience of installation of the loading support seat 211; on the other hand, the U-shaped structure design significantly increases the welding area of the third connecting rod 22213 and the fourth connecting rod 22214 with the first connecting rod 22211, the second connecting rod 22212 and the loading support seat mounting plate 2222, respectively, thereby effectively improving the convenience of welding the mobile connecting seat 2221 while improving the stability of the mobile connecting seat 2221.

[0031] Furthermore, there are a base 11 of the diameter-expanding simulator, a main adjustment structure 12 for adjusting the diameter-expanding die 3, and a rotating structure for connecting the diameter-expanding die 3. The main adjustment structure 12 is connected to the base 11 of the diameter-expanding simulator; the rotating structure is connected to the main adjustment structure 12 and is connected to the other side of the base 11 of the diameter-expanding simulator relative to the main adjustment structure 12. In the embodiment of the present invention, the connection between the diameter-expanding die 3 and the rotating structure is a detachable connection, mainly connected by a threaded connector. To make the installation or disassembly more convenient, it is usually necessary for an operator to turn the diameter-expanding die 3 to a more convenient position for disassembly. In the embodiment of the present invention, the rotating structure drives the main adjustment structure 12 to rotate synchronously during rotation, so that the diameter-expanding die 3 changes from manual rotation to automatic rotation, saving the labor required during disassembly and improving the convenience of installing or disassembling the diameter-expanding die 3. The rotating structure includes a power structure 131 and a rotating connector 132. The rotating connector 132 is connected to the base 11 of the diameter-expanding simulator and is for connecting the diameter-expanding die 3. The main adjustment structure 12 is limited by the rotating connector 132 and adjusts the diameter-expanding die 3. The power structure 131 is connected to the rotating connector 132 and drives the rotating connector 132 to rotate to install or disassemble the diameter-expanding die 3, so that the diameter-expanding die 3 changes from manual rotation to automatic rotation for installation or disassembly, improving the test efficiency.

[0032] Furthermore, the rotating structure further includes a rotating gear 133. The rotating gear 133 is connected to the rotating connector 132, and the power structure 131 is connected to the rotating gear 133 to drive the rotating connector 132 to rotate, which can realize the rapid installation and disassembly of the diameter-expanding die 3, reduce the time and labor intensity of manual operation, and improve the test efficiency.

[0033] In the embodiment of the present invention, the rotating gear 133 and the rotating connector 132 are fastened by a threaded connection method, effectively enhancing the connection stability. At the same time, the rotation accuracy of the rotating connector 132 is improved through gear transmission, so that the diameter-expanding die 3 is turned to a more convenient position for disassembly, thereby improving the installation and disassembly efficiency.

[0034] In the embodiment of the present invention, the rotating connector 132 is provided with a rotating connector body 1321 and a rotating connection limiting member 1322. The rotating gear 133 is connected to one end of the rotating connector body 1321, and the diameter-expanding die 3 is connected to the other end of the rotating connector body 1321 relative to the rotating gear 133; the main adjustment structure 12 is connected inside the rotating connector body 1321 and is limited by the rotating connection limiting member 1322.

[0035] Preferably, the rotating connector body 1321 is provided with a rotating gear mounting portion 13213, a rotating gear limiting end 13214, and an expanding die mounting portion 13215. The rotating gear 133 is provided with a rotating gear mounting hole 1331 and a plurality of rotating gear limiting holes arranged equidistantly in the circumferential direction. The rotating gear limiting end 13214 is provided with a plurality of rotating gear fastening holes corresponding to the rotating gear limiting holes one by one. The rotating gear 133 is mounted on the rotating gear mounting portion 13213 through the rotating gear mounting hole 1331, and is fastened to the rotating connector body 1321 by connecting a first threaded connector in the rotating gear limiting hole and the rotating gear fastening hole, preventing the rotating gear 133 from shaking during transmission on the premise of ensuring uniform force on the rotating connector body 1321, so as to improve the transmission accuracy of the rotating gear 133; the expanding die mounting portion 13215 is further provided with an expanding die positioning groove and a plurality of expanding die fastening holes arranged equidistantly in the circumferential direction. The expanding die 3 is first snapped into the expanding die positioning groove, and then the expanding die 3 is fastened to the expanding die mounting portion 13215 by a second threaded connector, so as to improve the convenience of installation and disassembly of the expanding die 3.

[0036] Preferably, the rotating connector body 1321 is further provided with an adjusting structure installation cavity 13211 and a connecting limiting member installation position 13212. The connecting limiting member installation position 13212 communicates with the adjusting structure installation cavity 13211. The main adjusting structure 12 adjusts the expanding die 3 through the adjusting structure installation cavity 13211, and the rotating connection limiting member 1322 is connected to the connecting limiting member installation position 13212 to limit the main adjusting structure 12, so as to ensure that the rotating connector body 1321 can drive the main adjusting structure 12 to rotate synchronously for installation and disassembly, reducing the time and labor intensity of manual operation and improving the convenience of installation and disassembly of the expanding die simulator.

[0037] Preferably, the power structure 131 is a driving motor, and a power output gear 1311 is provided at the output end of the driving motor. The power output gear 1311 is connected to the rotating gear 133 to drive the rotating connector body 1321 to rotate, so as to provide a stable rotational speed and torque through the driving motor, ensure the smooth and accurate rotation of the rotating connector body 1321, and further realize the smooth installation and disassembly of the expanding die 3, improving the operation efficiency and reliability of the whole device; in the implementation of the present invention, the driving motor is one of a stepping motor, a DC motor, and a servo motor, so as to rotate the expanding die 3 to a more convenient position for disassembly through the driving motor, and at the same time improve the control accuracy, which is beneficial to improving the test efficiency of the expanding die simulator.

[0038] Furthermore, the main adjustment structure 12 is provided with a main adjustment oil cylinder 121, a pull rod shaft 122, and a telescopic connecting member 123. The main adjustment oil cylinder 121 is connected to the base 11 of the diameter expansion simulator; the pull rod shaft 122 is connected to the main adjustment oil cylinder 121 through the telescopic connecting member 123, and the main adjustment oil cylinder 121 drives the pull rod shaft 122 to move relatively in the adjustment structure installation cavity 13211. In the embodiment of the present invention, the pull rod shaft 122 is fastened to the main adjustment oil cylinder 121 through the telescopic connecting member 123. On the premise of improving the convenience of installation or disassembly of the telescopic connecting member 123, the maximum displacement of the pull rod shaft 122 is restricted by the telescopic connecting member 123 to ensure that the pull rod shaft 122 will not damage the diameter expansion die 3, enhancing the safety of the diameter expansion simulator during use. Designed in this way, the hydraulic power can be accurately converted into mechanical adjustment actions, enabling the main adjustment oil cylinder 121 to provide stable pushing and pulling forces, ensuring that the pull rod shaft 122 reciprocates smoothly in the adjustment structure installation cavity 13211 to adjust the expansion or reset of the diameter expansion die 3.

[0039] Preferably, the main adjustment oil cylinder 121 is provided with a main adjustment oil cylinder body 1211 and a main adjustment oil cylinder piston rod 1212; one end of the main adjustment oil cylinder piston rod 1212 is connected to the main adjustment oil cylinder body 1211, and the other end is connected to the pull rod shaft 122 through the telescopic connecting member 123 to drive the pull rod shaft 122 to move relative to the rotating connecting member body 1321. In the embodiment of the present invention, the telescopic connecting member 123 is provided with a telescopic connecting member upper cover 1231 and a telescopic connecting member lower cover 1232. The telescopic connecting member upper cover 1231 is connected to the telescopic connecting member lower cover 1232 by means of threaded connection, and the telescopic connecting member upper cover 1231 is provided with a telescopic connecting member upper cover groove, and the telescopic connecting member lower cover 1232 is provided with a telescopic connecting member lower cover groove. The telescopic connecting member upper cover groove and the telescopic connecting member lower cover groove enclose a main adjustment structure installation cavity. One ends of the main adjustment oil cylinder piston rod 1212 and the pull rod shaft 122 are respectively fixed in the main adjustment structure installation cavity. On the premise of ensuring that the main adjustment oil cylinder piston rod 1212 can push or pull the pull rod shaft 122 to reciprocate, the telescopic connecting member 123 will not drive the pull rod shaft 122 to rotate synchronously during the rotation of the rotating connecting member body 1321, thereby extending the service life of the main adjustment oil cylinder piston rod 1212.

[0040] Preferably, the pull rod shaft 122 is provided with a pull rod shaft limiting portion 1221, and the rotation connection limiting member 1322 abuts against the pull rod shaft limiting portion 1221 to limit the pull rod shaft 122.

[0041] In the embodiment of the present invention, the limiting part 1221 of the pull rod shaft is designed as a plane, and limiting ends of the rotation connection limiting parts are provided at both ends to limit the rotation connection limiting part 1322, so as to ensure that during the installation, disassembly or removal of the telescopic connection part 123, the pull rod shaft 122 abuts against the limiting ends of the rotation connection limiting part through the rotation connection limiting part 1322, so that the pull rod shaft 122 is always within the safe telescopic range; a plurality of rotation connection limiting part fastening holes are provided at the rotation connection limiting part installation position 13212, the rotation connection limiting part 1322 is provided with a limiting connection slider 13221 and a plurality of rotation connection limiting part installation holes corresponding to the rotation connection limiting part fastening holes one by one, and the rotation connection limiting part 1322 is fastened to the rotation connection part body 1321 by connecting in the rotation connection limiting part installation holes and the rotation connection limiting part fastening holes through a third threaded connection part, so as to enhance the stability of the structural connection; the limiting connection slider 13221 is detachably connected to the rotation connection limiting part 1322, and the contact surface between the limiting connection slider 13221 and the limiting part 1221 of the pull rod shaft is also a plane, so as to ensure the smoothness of the telescopic movement of the pull rod shaft 122.

[0042] Further, the base 11 of the diameter expansion simulator is provided with a bracket support seat 111, a first frame vertical plate 112, a second frame vertical plate 113, and a third frame vertical plate 114. The first frame vertical plate 112 and the third frame vertical plate 114 are oppositely connected to both sides of the bracket support seat 111, and the second frame vertical plate 113 is arranged between the first frame vertical plate 112 and the third frame vertical plate 114; the main adjustment structure 12 is connected to the first frame vertical plate 112 and the second frame vertical plate 113, one end of the rotation connection part 132 is connected to the second frame vertical plate 113, and the other end is connected to the third frame vertical plate 114. The power structure 131 is connected to the bracket support seat 111 and is rotationally connected to the rotation connection part 132.

[0043] In an embodiment of the present invention, the main adjustment oil cylinder body 1211 is detachably connected to the first frame vertical plate 112. The main adjustment oil cylinder piston rod 1212 passes through the first frame vertical plate 112 and is connected to the pull rod shaft 122 between the first frame vertical plate 112 and the second frame vertical plate 113, so as to limit the maximum elongation of the pull rod shaft 122 by abutting against the second frame vertical plate 113 through the telescopic connecting member 123. A frame support column 115 is further provided between the first frame vertical plate 112 and the second frame vertical plate 113. Preferably, there are four frame support columns 115, which are respectively arranged at the four support corners of the first frame vertical plate 112 and the second frame vertical plate 113 to enhance the stability of the connection between the first frame vertical plate 112 and the second frame vertical plate 113, and further enhance the stability of the main adjustment oil cylinder body 1211 connected to the first frame vertical plate 112.

[0044] Preferably, the second frame vertical plate 113 is provided with a rotation connection fastener 1131, and the rotation connection fastener 1131 is arranged on the other side of the second frame vertical plate 113 relative to the rotation connection member body 1321. The rotation gear mounting portion 13213 is connected to the rotation connection fastener 1131 to detachably connect the rotation connection member body 1321 to the second frame vertical plate 113, so as to improve the convenience of installation and disassembly of the rotation connection member body 1321.

[0045] Preferably, the third frame vertical plate 114 includes an upper connection plate 1141 and a lower connection plate 1142. The upper connection plate 1141 is connected to the lower connection plate 1142 to fasten one end of the rotation connection member 132 to the third frame vertical plate 114, so as to improve the convenience of installation and disassembly of the rotation connection member 132.

[0046] In the embodiment of the present invention, the second frame vertical plate 113 is further provided with a first lubrication hole 1132 and a rotating connection fastener installation hole 1133. The rotating connection fastener 1131 is rotatably connected in the rotating connection fastener installation hole 1133. The first lubrication hole 1132 communicates with the rotating connection fastener installation hole to regularly inject lubricating fluid into the rotating connection fastener installation hole through the first lubrication hole 1132, ensuring the smooth rotation of the rotating connection member body 1321, and at the same time reducing the frictional damage of the rotating connection fastener 1131 to extend the service life of the rotating connection fastener 1131. The third frame vertical plate 114 is further provided with a second lubrication hole 1143, a rotating member lubricating sleeve 1144, and a first rotating member installation hole. The rotating member lubricating sleeve 1144 is installed in the first rotating member installation hole. The rotating connection member body 1321 is rotatably connected in the rotating member lubricating sleeve 1144 to reduce the frictional damage between the rotating connection member body 1321 and the third frame vertical plate 114. The rotating member lubricating sleeve 1144 is provided with a lubricating sleeve limit card slot to fasten the rotating member lubricating sleeve 1144 in the first rotating member installation hole through the lubricating sleeve limit card slot. The second lubrication hole 1143 communicates with the first rotating member installation hole to reduce the frictional damage of the rotating member lubricating sleeve 1144 by regularly injecting lubricating fluid into the first rotating member installation hole. In the embodiment of the present invention, the rotating member lubricating sleeve 1144 is of a detachable design and can be detached into an upper rotating member lubricating sleeve and a lower rotating member lubricating sleeve to ensure that the lubricating fluid reaches the rotating connection member body 1321 through the connection gap between the upper rotating member lubricating sleeve and the lower rotating member lubricating sleeve, thereby ensuring the smooth rotation of the rotating connection member body 1321. The rotating connection member 132 is further provided with a first connection sleeve 1323 and a second connection sleeve 1324. The first connection sleeve 1323 and the second connection sleeve 1324 are relatively installed at both ends of the rotating connection member body 1321 for the pull rod shaft 122 to pass through, thereby reducing the damage of the rotating connection member body 1321 to the pull rod shaft 122 and extending the service life of the pull rod shaft 122.

[0047] Preferably, the bracket support base 111 is further provided with a foundation bolt installation position 1111. The bracket support base 111 is connected to the foundation bolt through the foundation bolt installation position 1111 to enhance the stability of the diameter expansion simulator during use.

[0048] Preferably, the diameter-expanding die 3 includes: a telescopic connection structure 31, a diameter-expanding tool structure 32, and a diameter-expanding adjustment structure 33. The telescopic connection structure 31 is detachably connected to the rotating connection member body 1321, and the diameter-expanding tool structure 32 is detachably connected to the telescopic connection structure 31; the diameter-expanding adjustment structure 33 is movably connected to the diameter-expanding tool structure 32, so that the diameter-expanding tool structure 32 can move relative to the diameter-expanding adjustment structure 33 to expand the pipe to be expanded (in the embodiment of the present invention, it is to radially extrude the pipe diameter simulation block 2121 to simulate the expansion of the pipe to be expanded); the telescopic connection structure 31 includes a first telescopic connection sleeve 311 for the pull rod shaft 122 to be inserted into and a second telescopic connection sleeve 312 for limiting the pull rod shaft 122. The second telescopic connection sleeve 312 is detachably connected to the first telescopic connection sleeve 311 by means of threaded connection. The first telescopic connection sleeve 311 is provided with a pull rod shaft installation hole 3111 for the pull rod shaft 122 to be inserted into and a telescopic connection sleeve positioning protrusion 3112. The first telescopic connection sleeve 311 is connected to the diameter-expanding die positioning groove through the telescopic connection sleeve positioning protrusion 3112 for quick positioning, so as to improve the convenience of connection; the second telescopic connection sleeve 312 is provided with a pull rod shaft limiting hole for limiting the pull rod shaft 122. The pull rod shaft 122 is provided with a first pull rod shaft connection end 1222 and a second pull rod shaft connection end 1223. The first pull rod shaft connection end 1222 and the second pull rod shaft connection end 1223 are respectively connected to the pull rod shaft installation hole 3111 and the pull rod shaft limiting hole, so as to push the diameter-expanding tool structure 32 to move relative to the diameter-expanding adjustment structure 33 to radially extrude the pipe diameter simulation block 2121 by abutting the first pull rod shaft connection end 1222 against the pull rod shaft limiting hole; the diameter-expanding tool structure 32 includes a diameter-expanding tool head support seat 321 and a plurality of diameter-expanding tool heads 322. The diameter-expanding tool head support seat 321 is provided with a diameter-expanding tool head limiting card slot 3211. The diameter-expanding tool head 322 is provided with a diameter-expanding tool head body 3221, a diameter-expanding tool head guide block 3222, and a diameter-expanding tool head guide plate 3223. The diameter-expanding tool head body 3221 is provided with a first diameter-expanding tool head limiting end 32211, a diameter-expanding tool head inclined end 32212, and a diameter-expanding tool head flat end 32213. The diameter-expanding tool head flat end is arranged on the other side of the diameter-expanding tool head body 3221 relative to the diameter-expanding tool head inclined end. The diameter-expanding tool head guide block 3222 is connected to the diameter-expanding tool head inclined end to drive the diameter-expanding tool head 322 to radially extrude the pipe diameter simulation block 2121; the first diameter-expanding tool head limiting end is movably connected in the diameter-expanding tool head limiting card slot 3211 to ensure that the diameter-expanding tool head 322 uniformly radially extrudes the pipe diameter simulation block 2121 along the diameter-expanding tool head limiting card slot 3211;The expanding cutter head guide plate 3223 is connected to the front end of the expanding cutter head 322 and can abut against the expanding adjustment structure 33 to ensure that the expanding cutter head 322 uniformly radially extrudes the pipe diameter simulation block 2121; the expanding adjustment structure 33 is provided with an expansion guide portion 331 and an expansion abutting portion 332. The expansion guide portion is designed with an inclined structure, and the expansion guide portion 331 is provided with a plurality of expansion guide grooves 3311. The expanding cutter head guide block 3222 is movably connected in the expansion guide grooves 3311. Before expansion, the expansion abutting portion 332 abuts against the pipe to be expanded and is fastened, so that the pull rod shaft 122 pushes the expanding cutter tool structure 32 to move forward smoothly along the expansion guide portion 331 toward the expansion abutting portion 332, and the expanding cutter head guide block 3222 relatively moves along the expansion guide grooves 3311, so that the expanding cutter head body 3221 performs a radial movement along the expanding cutter head limit card slot 3211, thereby uniformly radially extruding the pipe diameter simulation block 2121, so as to collect the actual working data of the expanding die 3 through the simulation loading device 2.;

Claims

1. Multimodal mechanical property testing device for tube expanding machine, characterized in that Including: A diameter-expanding simulator (1) for connecting a diameter-expanding die (3), and a simulation loading device (2) for simulating the diameter of a pipeline to be expanded; The simulation loading device (2) includes a loading device (21) for simulating the diameter of the pipeline to be expanded, and a moving device for moving the loading device (21); The diameter-expanding die (3) is connected to the diameter-expanding simulator (1). The loading device (21) includes a loading support base (211) and a diameter simulation structure (212). The loading support base (211) is connected to the moving device for movement. A plurality of the diameter simulation structures (212) are connected to the loading support base (211) to form a simulated diameter test cavity (213) for the diameter-expanding die (3) to enter. The diameter simulation structure (212) includes a diameter simulation block (2121) and a diameter adjustment structure (2122). The diameter simulation block (2121) is connected to the diameter adjustment structure (2122). The diameter adjustment structure (2122) drives the diameter simulation block (2121) to move radially relative to the loading support base (211), and the size of the simulated diameter test cavity (213) is adjusted to test the diameter-expanding die (3).

2. The multi-modal mechanical property testing device for an expanding machine according to claim 1, wherein A plurality of the diameter simulation structures (212) are connected to the loading support base (211) at equal intervals.

3. The multi-modal mechanical property testing device for an expanding machine according to claim 1, wherein The diameter simulation block (2121) is provided with an arc portion (21211) and a diameter simulation portion installation position (21212) for limiting the diameter simulation block (2121). The diameter adjustment structure (2122) is connected to the diameter simulation portion installation position (21212), drives the diameter simulation block (2121) to move radially, and forms the simulated diameter test cavity (213) by enclosing with a plurality of the arc portions (21211).

4. The multi-modal mechanical property testing device for an expanding machine according to claim 3, wherein The diameter adjustment structure (2122) is provided with a secondary adjustment oil cylinder body (21221) and an adjustment oil cylinder push rod (21222). One end of the adjustment oil cylinder push rod (21222) is connected to the secondary adjustment oil cylinder body (21221), and the other end is connected to the diameter simulation portion installation position (21212). The adjustment oil cylinder push rod (21222) is driven by the diameter adjustment structure (2122) to drive the diameter simulation block (2121) to move radially relative to the loading support base (211).

5. The multi-modal mechanical property testing device for an expanding machine according to claim 4, characterized in that, The diameter simulation portion installation position (21212) is provided with an arc-shaped groove (212121), and the adjustment oil cylinder push rod (21222) is provided with an arc-shaped connecting portion (212221). The adjustment oil cylinder push rod (21222) is connected to the arc-shaped groove (212121) through the arc-shaped connecting portion (212221), and the diameter simulation block (2121) is limited by the arc-shaped groove (212121).

6. The multi-modal mechanical property testing device for an expanding machine 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 mobile support base (222) moves relative to the mobile guide rail (221) to drive the loading support base (211) to displace.

7. The multi-modal mechanical property testing device for the pipe diameter expanding machine according to claim 1, characterized in that The diameter-expanding simulator (1) includes a diameter-expanding simulator base (11), a main adjustment structure (12) for adjusting the diameter-expanding die (3), and a rotating structure for connecting the diameter-expanding die (3). The main adjustment structure (12) is connected to the diameter-expanding simulator base (11); the rotating structure is connected to the main adjustment structure (12) and is connected to the other side of the diameter-expanding simulator base (11) relative to the main adjustment structure (12). The rotating structure includes a power structure (131) and a rotating connecting piece (132). The rotating connecting piece (132) is connected to the diameter-expanding simulator base (11) and is for connecting the diameter-expanding die (3). The main adjustment structure (12) is limited by the rotating connecting piece (132) and adjusts the diameter-expanding die (3); the power structure (131) is connected to the rotating connecting piece (132) and drives the rotating connecting piece (132) to rotate to install or disassemble the diameter-expanding die (3).

8. The multi-modal mechanical property testing device for an expanding machine according to claim 7, characterized in that, The rotating structure further includes a rotating gear (133). The rotating gear (133) is connected to the rotating connecting piece (132), and the power structure (131) is connected to the rotating gear (133) to drive the rotating connecting piece (132) to rotate. The rotating connecting piece (132) is provided with a rotating connecting piece body (1321) and a rotating connection limiting piece (1322). The rotating gear (133) is connected to one end of the rotating connecting piece body (1321), and the diameter-expanding die (3) is connected to the other end of the rotating connecting piece body (1321) relative to the rotating gear (133); the main adjustment structure (12) is connected inside the rotating connecting piece body (1321) and is limited by the rotating connection limiting piece (1322).

9. The multi-modal mechanical property testing device for an expanding machine according to claim 7, characterized in that, The main adjustment structure (12) is provided with a main adjustment oil cylinder (121), a pull rod shaft (122), and a telescopic connecting piece (123). The main adjustment oil cylinder (121) is connected to the diameter-expanding simulator base (11); the pull rod shaft (122) is connected to the main adjustment oil cylinder (121) through the telescopic connecting piece (123), and the main adjustment oil cylinder (121) drives the pull rod shaft (122) to move relatively inside the rotating connecting piece body (1321).

10. The multi-modal mechanical property testing device for an expanding machine according to claim 7, characterized in that, The base (11) of the diameter-expanding simulator is provided with a bracket support seat (111), a first frame vertical plate (112), a second frame vertical plate (113), and a third frame vertical plate (114). The first frame vertical plate (112) and the third frame vertical plate (114) are relatively connected to both sides of the bracket support seat (111), and the second frame vertical plate (113) is arranged between the first frame vertical plate (112) and the third frame vertical plate (114). The main adjustment structure (12) is connected to the first frame vertical plate (112) and the second frame vertical plate (113). One end of the rotating connecting piece (132) is connected to the second frame vertical plate (113), and the other end is connected to the third frame vertical plate (114). The power structure (131) is connected to the bracket support seat (111) and is rotatably connected to the rotating connecting piece (132).

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