A longitudinal tensile testing fixture

Abstract

This utility model discloses a longitudinal tensile testing fixture, belonging to the technical field of testing equipment. It includes a base frame, a first end connecting mechanism, a second end connecting mechanism, and a loading assembly. The base frame has a support platform with a first through hole in the middle, penetrating the upper and lower surfaces of the support platform. The first end connecting mechanism and the second end connecting mechanism are located on the upper and lower sides of the support platform, respectively, and the first end connecting mechanism is fixedly connected to the support platform. The loading assembly includes several loading power elements, which are positioned between the support platform and the second end connecting mechanism. During testing, the upper and lower ends of the test piece are connected to the first and second end connecting mechanisms, respectively. The loading power elements are controlled to extend, thereby applying force to the second end connecting mechanism to achieve tensile testing of the test piece and meet the requirements for large load testing of the test piece.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, specifically to a longitudinal tensile force testing fixture. Background Technology

[0002] As a crucial component of energy development, the deep-sea oil and gas drilling and production industry has experienced rapid growth in recent years. Riser pipes, as key equipment, must withstand immense pressure and temperature, as well as the complex marine environment, during deep-sea oil and gas drilling and production. Their performance directly impacts the safety and efficiency of drilling operations. During riser pipe production, tensile testing fixtures are used to apply tension to the riser pipes, testing their condition under rated load to verify whether the test piece meets usage requirements.

[0003] Existing tensile testing methods sometimes involve adding weights longitudinally to the test specimen. However, the amount of load that can be applied is limited by factors such as the weight and volume of the weights. Test specimens requiring large loads are typically tested laterally. For test specimens intended for vertical use, it is necessary to simulate real-world usage conditions. For test specimens whose shape makes them unsuitable for lateral placement, existing testing methods are insufficient to meet the requirements.

[0004] Therefore, a longitudinal tensile testing fixture capable of applying large loads is needed for tensile testing. Summary of the Invention

[0005] To address the problems existing in the prior art, this utility model provides a longitudinal tensile testing fixture that can perform tensile tests on test pieces under large loads.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] This utility model provides a longitudinal tensile testing fixture for performing tensile tests on test pieces; it includes a base frame, a first end connecting mechanism, a second end connecting mechanism, and a loading component;

[0008] The base frame is provided with a support platform, and the support platform has a first through hole in the middle, which penetrates the upper and lower surfaces of the support platform.

[0009] The first end connection mechanism and the second end connection mechanism are located on the upper and lower sides of the support platform, respectively, and the first end connection mechanism is fixedly connected to the support platform;

[0010] The loading component includes a plurality of loading power elements, which are located between the support platform and the second end connection mechanism;

[0011] During testing, the upper and lower ends of the test piece are connected to the first end connection mechanism and the second end connection mechanism, respectively. The loading power element is controlled to extend, thereby applying a force to the second end connection mechanism to achieve the tensile test of the test piece.

[0012] The loading power element is set between the support platform and the second end connection mechanism. When the loading power element extends, it applies a thrust to the support platform and the second end connection mechanism, thereby applying a tensile force to one end of the test piece to achieve tensile testing of the test piece. The number of loading power elements can be set as needed to meet the requirements of large load testing of the test piece. When the loading power element adopts a hydraulic cylinder, the test load that can be provided is as high as 1600 tons.

[0013] In the aforementioned longitudinal tensile testing fixture, the first end connection mechanism is located on the upper side of the support platform, and the second end connection mechanism is located on the lower side of the support platform.

[0014] The loading power element is located between the support platform and the second end connection mechanism. The second end connection mechanism is located on the lower side of the support platform, which allows the loading power element to be located at the bottom of the entire tooling. This facilitates the connection of the loading power element to external equipment and also makes it easier to maintain the tooling.

[0015] In the aforementioned longitudinal tensile testing fixture, the upper and lower ends of the test piece are respectively connected to the first end connection mechanism and the second end connection mechanism via a test piece connection assembly;

[0016] The specimen connection assembly includes a connecting flange and a load-bearing shaft; the connecting flange includes a shaft portion and a flange portion, the flange portion being used to connect the test specimen; one end of the shaft portion is fixedly connected to the flange portion, and the other end is provided with a load-bearing hole; the load-bearing shaft is located in the load-bearing hole and at least one end extends outward from the connecting flange, and is connected to the first end connection mechanism or the second end connection mechanism.

[0017] The test piece is fixed by using a connecting flange and a load-bearing shaft. The structure is simple and easy to assemble and disassemble. This is reflected not only in the ease of assembly and disassembly of the test piece connecting assembly with the first end connecting mechanism and the second end connecting mechanism, but also in the connection between the connecting flange and the test piece, which is highly operable.

[0018] In the aforementioned longitudinal tensile testing fixture, the inner diameter of the bearing hole at the end near the flange is larger than the inner diameter at the end away from the flange.

[0019] And / or, it also includes an adapter for connecting the test piece and the connecting flange.

[0020] The load-bearing hole is designed with one end larger than the other. The larger end facilitates the insertion of the load-bearing shaft, while the smaller end ensures maximum contact area between the load-bearing hole and the load-bearing shaft, resulting in high force transmission stability. The application of the adapter expands the scope of application of the tooling in this application. When changing different test pieces, only the adapter needs to be replaced accordingly. At the same time, the connection method between the adapter and the connecting flange is highly versatile, and the processing and manufacturing process is simple.

[0021] In the aforementioned longitudinal tensile testing fixture, the first end connection mechanism includes a connecting bracket and a first end bracket, wherein the connecting bracket detachably connects the first end bracket to the support platform.

[0022] The first end bracket has a second through hole that penetrates the upper and lower sides of the first end bracket; the shaft portion of the connecting flange is located inside the second through hole, and the load-bearing hole is located on the upper side of the first end bracket, while the flange portion is located on the lower side of the first end bracket.

[0023] The first end connection structure, formed by the connecting bracket and the first end bracket, provides a large testing space for the test piece; the test piece is located inside the first end connection mechanism, which ensures stable and safe testing.

[0024] In the aforementioned longitudinal tensile testing fixture, the connecting bracket includes several sets of support columns and bridging plates. Each set of support columns includes two uprights, which are arranged in parallel and fixed together by the connecting plate.

[0025] The bridging plate securely connects two adjacent support columns.

[0026] The connecting bracket has high strength and is suitable for high load testing of test pieces.

[0027] In the aforementioned longitudinal tensile testing fixture, the outer diameter of the flange is larger than the diameter of the second through hole.

[0028] The load-bearing shaft and flange are respectively limited on the upper and lower sides of the first end bracket, which can limit the specimen connection assembly to the first end bracket and the second end bracket.

[0029] In the aforementioned longitudinal tensile testing fixture, the second end connection mechanism includes a second end bracket, the second end bracket being provided with a third through hole, the third through hole penetrating the second end bracket in the vertical direction; the shaft portion of the connecting flange is located within the third through hole, and the load-bearing hole is located on the lower side of the second end bracket, while the flange portion is located on the upper side of the second end bracket.

[0030] The second end bracket is connected to the specimen connection assembly via the third through hole, resulting in a simple structure and high reliability.

[0031] In the aforementioned longitudinal tensile testing fixture, the loading component includes a pressure detection element for detecting the magnitude of the force exerted by the loading power element.

[0032] By utilizing the force value of the loading power element fed back by the pressure detection element, the progress of the test can be intuitively analyzed and judged, and the test process can be precisely controlled.

[0033] In the aforementioned longitudinal tensile testing fixture, several loading power elements are evenly distributed in the circumferential direction centered on the third through hole; test tensile force can be applied evenly in the circumferential direction of the test piece.

[0034] The beneficial effects of this utility model are as follows:

[0035] The longitudinal tensile testing fixture of this application enables large load tensile testing in the vertical direction. For test pieces used in vertical conditions, it can more accurately simulate the actual usage conditions to test the tensile force. For test pieces that are inconvenient to place horizontally, it can solve the placement problem and use the longitudinal tensile testing fixture of this application to test in the vertical direction.

[0036] The loading power element is positioned between the support platform and the second end connection mechanism. During testing, thrust can be applied to both the support platform and the second end connection mechanism simultaneously to meet the requirements of large load testing of the specimen. Furthermore, positioning the second end connection mechanism on the lower side of the support platform allows the loading power element to be located at the bottom of the entire fixture, facilitating maintenance.

[0037] The test piece is fixed by using a connecting flange and a load-bearing shaft, which is simple in structure and easy to assemble and disassemble.

[0038] The solution of connecting the test piece and the connecting flange with an adapter increases the scope of application of the tooling in this application. The connection method between the adapter and the connecting flange is highly versatile and the processing and manufacturing process is simple.

[0039] The first end connection structure, formed by the connecting bracket and the first end bracket, provides a large testing space for the test piece; the test piece is located inside the first end connection mechanism, which ensures stable and safe testing; the overall strength is high, making it suitable for high-load testing of the test piece;

[0040] The application of pressure detection elements allows for direct observation of the force applied by the loading power element, enabling analysis and judgment of the test progress and precise control of the test process. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the overall structure of one embodiment of a longitudinal tensile testing fixture of this utility model;

[0042] Figure 2This is a cross-sectional view of a longitudinal tensile testing fixture according to the present invention;

[0043] Figure 3 This is a schematic diagram of the loading component and the second end connection mechanism in a longitudinal tensile force testing fixture of this utility model;

[0044] Figure 4 This is a partially enlarged view of the first end connection mechanism in a longitudinal tensile testing fixture of this utility model;

[0045] Figure 5 for Figure 2 A magnified view of area A in the middle.

[0046] In the picture:

[0047] 100 - Base frame; 110 - Support leg; 120 - Support platform; 121 - First through hole;

[0048] 200 - First end connection mechanism; 210 - Connecting bracket; 211 - Column; 212 - Connecting plate; 213 - Bridging plate; 220 - First end bracket; 221 - Second through hole;

[0049] 300 - Second end connection mechanism; 310 - Second end bracket; 311 - Third through hole;

[0050] 400 - Specimen connection assembly; 410 - Connection flange; 411 - Load-bearing hole; 412 - Flange section; 413 - Shaft section; 420 - Load-bearing shaft;

[0051] 500 - Loading component; 510 - Loading power component; 520 - Pressure detection component;

[0052] 600-Adapter;

[0053] 700 - Test piece. Detailed Implementation

[0054] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0055] Please refer to Figure 1 , Figure 2 This invention provides an embodiment of a longitudinal tensile testing fixture, comprising a base frame 100, a first end connecting mechanism 200, a second end connecting mechanism 300, and a loading component 500.

[0056] The base frame 100 serves as the base of the tooling, supporting the first end connecting mechanism 200, the second end connecting mechanism 300, and the loading assembly 500. The base frame 100 has a support platform 120, with a first through hole 121 in the middle, penetrating the upper and lower surfaces of the support platform 120. The upper and lower sides of the support platform 120 are assembly spaces. The first end connecting mechanism 200 and the second end connecting mechanism 300 are located on the upper and lower sides of the support platform 120, respectively. During testing, the test piece 700 is located within the first through hole 121, with its upper and lower ends connected to the first end connecting mechanism 200 and the second end connecting mechanism 300, respectively.

[0057] For example, a support leg 110 is provided on the lower side of the base frame 100, and the support leg 110 forms support on the lower side of the support platform 120, thereby forming assembly spaces on the upper and lower sides of the support platform 120. The support leg 110 can be configured as follows: Figure 1 As shown, four support legs 110 are distributed at the four corners of the support platform 120; alternatively, two support legs 110 can be provided, as long as the support platform 120 is adequately supported and the assembly space is formed. The support platform 120 can be constructed from a single piece of sheet metal or from multiple pieces assembled together. For a support platform 120 formed from multiple pieces, the pieces can be welded together or detachably connected using bolt assemblies. The support surface of the support platform 120 can be a complete plane, or a corresponding support surface can be set at a designated location according to usage requirements. The cross-sectional shape of the first through hole 121 can be any shape, such as rectangular or circular, as long as it allows the test piece 700 to pass through.

[0058] The first end connection mechanism 200 includes a connecting bracket 210 and a first end bracket 220. The connecting bracket 210 connects and fixes the first end bracket 220 to the support platform 120.

[0059] Preferably, the base frame 100, the connecting bracket 210, and the first end bracket 220 are arranged sequentially from bottom to top and are detachably connected, that is, the first end connecting mechanism 200 is located on the upper side of the support platform 120; correspondingly, the second end connecting mechanism 300 is arranged on the lower side of the support platform 120, so that the power-providing loading component 500 can be placed at a low position, which is convenient for later equipment maintenance.

[0060] The connecting bracket 210 is located between the first end bracket 220 and the support platform 120 of the base frame 100. Preferably, the upper and lower ends of the connecting bracket 210 are detachably connected to the first end bracket 220 and the support platform 120, respectively. For example, the connecting bracket 210, the first end bracket 220 and the base frame 100 are connected as a whole by bolt assembly, which has good stability.

[0061] To accommodate heavy load testing, the connecting bracket 210 includes several sets of support columns, such as... Figure 4 As shown, each set of support columns includes two uprights 211, which are arranged in parallel and fixed together by a connecting plate 212. The connection between the connecting plate 212 and the uprights 211 can be achieved by welding or by using bolt assemblies to achieve a detachable connection. The support columns have high strength and good load-bearing capacity.

[0062] For example, four sets of support columns are provided on the support platform 120, with each set located at one of the four corners of the support platform 120. Preferably, the four sets of support columns are connected by a bridging plate 213, thereby forming a test chamber inside. The four sets of support columns connecting the bracket 210 are connected as a whole during testing, resulting in high structural strength and ensuring that this part of the structure will not deform when placed horizontally; at the same time, it can also withstand the large forces during testing.

[0063] During testing, the test piece 700 is placed within the test cavity of the connecting bracket 210; the upper and lower ends of the test piece 700 are connected to the first end bracket 220 and the second end connecting mechanism 300 respectively via the test piece connecting assembly 400. Therefore, there are two sets of test piece connecting assemblies 400, such as... Figure 1 and Figure 5 As shown, each set of specimen connection components 400 includes a connection flange 410 and a load-bearing shaft 420.

[0064] The connecting flange 410 includes a shaft portion 413 and a flange portion 412. The flange portion 412 is fixedly connected to one end of the shaft portion 413. The flange portion 412 is used to connect the test piece 700. The other end of the shaft portion 413 is provided with a load-bearing hole 411. The load-bearing shaft 420 passes through the load-bearing hole 411, and both ends of the load-bearing shaft 420 extend outward from the connecting flange 410. The load-bearing hole 411 is pear-shaped, narrow at one end and wide at the other, to facilitate the passage of the load-bearing shaft 420. Preferably, the inner diameter of the load-bearing hole 411 is larger at the end near the flange portion 412 and smaller at the end away from the flange portion 412, and it is adapted to the shape of the load-bearing shaft 420. This results in a large contact surface between the connecting flange 410 and the load-bearing shaft 420, and good stress stability.

[0065] The first end bracket 220 has a second through hole 221 that penetrates the upper and lower sides of the first end bracket 220. The outer diameter of the shaft portion 413 is smaller than the diameter of the second through hole 221, so that the shaft portion 413 can be disposed within the second through hole 221. The load-bearing hole 411 and the flange portion 412 are located on the upper and lower sides of the first end bracket 220, respectively, and the shaft portion 413 is supported by the upper side of the first end bracket 220. Furthermore, the outer diameter of the flange portion 412 is larger than the diameter of the second through hole 221, and the length of the load-bearing shaft 420 is also larger than the diameter of the second through hole 221, so that the specimen connecting assembly 400 can be confined on the first end bracket 220.

[0066] The second end connection mechanism 300 is located within the assembly space below the support platform 120 of the base frame 100. For example... Figure 1 and Figure 3 As shown, the second end connection mechanism 300 includes a second end bracket 310; the second end bracket 310 is provided with a third through hole 311 and a plurality of loading power element mounting seats. The third through hole 311 penetrates the second end bracket 310 in the vertical direction and is used to connect the specimen connection assembly 400; specifically, the flange portion 412 of the connecting flange 410 is located on the upper side of the second end bracket 310, and the shaft portion 413 passes through the third through hole 311 and extends to the lower side of the second end bracket 310, so that the load-bearing hole 411 is located on the lower side of the second end bracket 310; the load-bearing shaft 420 is located in the load-bearing hole 411 and contacts the lower side of the second end bracket 310 during testing, thereby defining the axial position of the connecting flange 410. The plurality of loading power element mounting seats are preferably evenly distributed in the circumferential direction centered on the third through hole 311. For example, the number of loading power element mounting seats is 4, and adjacent loading power element mounting seats are spaced 90° apart.

[0067] The cross-sectional shapes of the second through hole 221 and the third through hole 311 are preferably adapted to the shape of the shaft portion 413; for example, the shaft portion 413 is cylindrical, and the second through hole 221 and the third through hole 311 are circular holes.

[0068] The loading assembly 500 applies a driving force to the second end connecting mechanism 300, providing the load required for testing to the test piece 700. The loading assembly 500 includes several loading power elements 510 and pressure sensing elements 520. The loading power elements 510 are located between the second end support 310 and the support platform 120. The loading power elements 510 are telescopic; when extended, they apply a counterforce to the second end support 310 and the support platform 120, i.e., a downward thrust on the second end support 310 and an upward thrust on the support platform 120. The loading power elements 510 can be cylinders, electric telescopic rods, etc., but preferably, hydraulic cylinders are used, which offer good controllability and can provide a larger force, thus meeting the needs of large load testing.

[0069] The pressure detection element 520 can be set between the loading power element 510 and the second end bracket 310 or the support platform 120 to detect the magnitude of the applied force.

[0070] For example, the loading power element 510 is a hydraulic cylinder, the housing of which is mounted on the loading power element mounting base, and a pressure sensing element 520 is provided at the free end of its piston rod. The pressure sensing element 520 may be a load cell or pressure sensor or other element capable of detecting pressure.

[0071] When using the longitudinal tensile testing fixture, first install the specimen on the fixture, including,

[0072] Step 1: Assemble the lower part of the second end bracket 310, loading power element 510, pressure detection element 520, connecting flange 410, and load-bearing shaft 420 together and place them on the support surface below the base frame 100. The support surface can be the outer surface of the plate or the ground, etc. The shaft portion 413 of the connecting flange 410 is located in the third through hole 311, the load-bearing hole 411 is located on the lower side of the second end bracket 310, and the flange portion 412 is located on the upper side of the second end bracket 310. The load-bearing shaft 420 is located in the load-bearing hole 411, and the lower end face of the connecting flange 410 supports the assembly.

[0073] Step 2: Connect the first end bracket 220, connecting flange 410, load-bearing shaft 420, and two adjacent support columns together, and place them horizontally on the ground, with the support columns supporting them underneath. Specifically, the shaft portion 413 of the connecting flange 410 is located within the second through hole 221, the load-bearing hole 411 is located on the upper side of the first end bracket 220, and the flange portion 412 is located on the lower side of the first end bracket 220; the load-bearing shaft 420 is located within the load-bearing hole 411.

[0074] Step 3: Connect the test piece 700 to the upper connecting flange 410.

[0075] Step 4: Hoist the first end bracket 220, connecting bracket 210, specimen connecting assembly 400 and test specimen 700 in the above combined state to a vertical position, and lower them onto the base frame 100. Then the support column is connected to the base frame 100.

[0076] Step 5: The lower end of the test piece 700 is connected to the lower connecting flange 410. At this time, the load-bearing shafts 420 at both the upper and lower ends are under stress.

[0077] Step Six: Finally, install the other two support columns.

[0078] In steps two and six, the support columns are assembled to provide operating space for the test piece 700 to connect with the connecting flanges 410 on the first end bracket 220 and the second end bracket 310 in steps three and five; it also ensures that the first end bracket 220 is stably and reliably connected to the base frame 100 in step four. The number and position of the support columns assembled in steps two and six can be set according to design needs and are not limited to the example above.

[0079] During testing,

[0080] The control loading power element 510 extends upward, the pressure detection element 520 presses against the base frame 100, the second end bracket 310 is subjected to a downward force, and then the test piece 700 is subjected to tension through the connecting flange 410 and the load-bearing shaft 420. By observing the reading fed back by the pressure detection element 520, the tension on the test piece 700 is adjusted to reach the test value.

[0081] The loading power element 510 is connected to an external hydraulic system, which drives the loading power element 510 to move. This is existing technology. The loading power element 510 applies a load to the test piece 700. The maximum load that this longitudinal tensile test fixture can provide is 1600 tons.

[0082] Furthermore, the test piece 700 is connected to the connecting flange 410 via the adapter 600; when the test piece 700 needs to be replaced, only the test piece 700 and the adapters 600 at both ends need to be replaced, achieving universality of the test fixture. The connection method between the test piece 700 and the adapter 600 can be a conventional bolt or screw connection.

[0083] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A longitudinal tensile test tool for performing a tensile test on a test piece (700), characterized by It includes a base frame (100), a first end connection mechanism (200), a second end connection mechanism (300), and a loading component (500). The base frame (100) is provided with a support platform (120), and the support platform (120) has a first through hole (121) in the middle, which penetrates the upper and lower surfaces of the support platform (120). The first end connection mechanism (200) and the second end connection mechanism (300) are located on the upper and lower sides of the support platform (120), respectively, and the first end connection mechanism (200) is fixedly connected to the support platform (120); The loading assembly (500) includes a plurality of loading power elements (510), which are located between the support platform (120) and the second end connection mechanism (300); During testing, the upper and lower ends of the test piece (700) are connected to the first end connection mechanism (200) and the second end connection mechanism (300) respectively, and the loading power element (510) is controlled to extend so as to apply force to the second end connection mechanism (300) to realize the tensile test of the test piece (700).

2. The longitudinal pull testing tool of claim 1, wherein, The first end connection mechanism (200) is located on the upper side of the support platform (120), and the second end connection mechanism (300) is located on the lower side of the support platform (120).

3. The longitudinal pull testing tool of claim 1, wherein, The upper and lower ends of the test piece (700) are respectively connected to the first end connection mechanism (200) and the second end connection mechanism (300) through the test piece connection assembly (400); The specimen connection assembly (400) includes a connecting flange (410) and a load-bearing shaft (420); the connecting flange (410) includes a shaft portion (413) and a flange portion (412), the flange portion (412) being used to connect the test specimen (700); one end of the shaft portion (413) is fixedly connected to the flange portion (412), and the other end is provided with a load-bearing hole (411); the load-bearing shaft (420) is located inside the load-bearing hole (411) and at least one end extends outward from the connecting flange (410), and is connected to the first end connection mechanism (200) or the second end connection mechanism (300).

4. The longitudinal pull testing tool of claim 3, wherein, The inner diameter of the bearing hole (411) near the flange (412) is larger than the inner diameter of the end away from the flange (412); And / or, also includes an adapter (600) for connecting the test piece (700) and the connecting flange (410).

5. The longitudinal pull testing tool of claim 3, wherein, The first end connection mechanism (200) includes a connecting bracket (210) and a first end bracket (220), wherein the connecting bracket (210) detachably connects the first end bracket (220) to the support platform (120); The first end bracket (220) has a second through hole (221) that passes through the upper and lower sides of the first end bracket (220); the shaft portion of the connecting flange (410) is located inside the second through hole (221), and the load-bearing hole (411) is located on the upper side of the first end bracket (220), and the flange portion (412) is located on the lower side of the first end bracket (220).

6. The longitudinal tensile force testing fixture according to claim 5, characterized in that, The connecting bracket (210) includes several sets of support columns and bridge plates (213). Each set of support columns includes two uprights (211). The two uprights (211) are arranged in parallel and fixed together by the connecting plate (212). The bridging plate (213) fixes the two adjacent support columns together.

7. The longitudinal pull testing tool of claim 5, wherein, The outer diameter of the flange (412) is larger than the diameter of the second through hole (221).

8. The longitudinal pull testing tool of claim 3, wherein, The second end connection mechanism (300) includes a second end bracket (310), the second end bracket (310) is provided with a third through hole (311), the third through hole (311) penetrates the second end bracket (310) in the vertical direction; the shaft portion of the connecting flange (410) is located in the third through hole (311), and the load-bearing hole (411) is located on the lower side of the second end bracket (310), and the flange portion (412) is located on the upper side of the second end bracket (310).

9. A longitudinal pull testing tool as claimed in claim 8, wherein, The loading component (500) includes a pressure detection element (520) for detecting the magnitude of the force exerted by the loading power element (510).

10. A longitudinal pull testing tool as claimed in claim 9, wherein, Several of the loading power elements (510) are evenly distributed in the circumferential direction centered on the third through hole (311).

Images