A pipe tensile testing machine

Abstract

This utility model discloses a pipe tensile testing machine, including a tensile mechanism, a first connecting mechanism, and a second connecting mechanism. The tensile mechanism includes a frame and a traction module, with the traction module movably disposed inside the frame. The first connecting mechanism includes a first connecting component and a first connector, which are threadedly connected. The first connecting component is connected to the traction module, which drives the first connecting mechanism to move. The second connecting mechanism is disposed below the first connecting mechanism and is fixedly connected to the lower part of the frame. This utility model facilitates fine-tuning of the relative distance between the first and second connectors, thereby improving the convenience of connecting the two ends of the pipe sample to the first and second connectors.

Description

Technical Field

[0001] This utility model relates to the field of pipe tensile testing technology, and in particular to a pipe tensile testing machine. Background Technology

[0002] In power and communication systems, conduits are used during the underground laying of power cables and communication cables. These conduits protect, resist pressure, and provide waterproofing. Before leaving the factory, the conduits undergo random inspection, including tensile testing. The conduits are cut or machined to obtain specimens of a specified shape and size, which are then tested in a tensile testing machine. This tests determine the tensile strength and other data of the conduit specimens, reflecting its ability to withstand stress and deformation. This ensures that the conduits meet national standards and engineering design requirements, preventing structural failure due to substandard mechanical properties and avoiding consequences such as communication or power outages. Existing tensile testing machines fix both ends of the pipe specimens using clamping joints or elastic clamping mechanisms. During multiple tests, in order to meet the fixed connection requirements of the pipe specimens of a specified length, the initial position of the tensile testing machine's traction module needs to be constantly adjusted. However, since the power source of the traction module is generally a motor or cylinder, it is difficult to quickly achieve precise micro-distance adjustments, resulting in time-consuming and labor-intensive adjustment operations that affect testing efficiency. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a pipe tensile testing machine that facilitates fine-tuning of the relative distance between the first joint and the second joint, thereby improving the convenience of connecting the two ends of the pipe sample to the first and second joints.

[0004] A pipe tensile testing machine according to an embodiment of the present invention includes: The tensioning mechanism includes a frame and a traction module, with the traction module mounted on the frame; The first connecting mechanism includes a first connecting component and a first connector. The first connecting component and the first connector are threadedly connected. The first connecting component is connected to a traction module, which is used to drive the first connecting mechanism to move. The second connecting mechanism is located below the first connecting mechanism and is fixedly connected to the lower part of the frame.

[0005] A pipe tensile testing machine according to an embodiment of the present utility model has at least the following beneficial effects: The first connecting mechanism is used to fix the upper end of the pipe sample, and the second connecting mechanism is used to fix the lower end of the pipe sample. The traction module drives the first connecting mechanism upwards to move away from the second connecting mechanism, straightening the pipe sample fixed between the first and second connecting mechanisms for tensile strength testing. The first connector can rotate relative to the first connecting assembly, and the relative distance between the first connector and the first connecting assembly changes with the rotation of the thread, allowing adjustment of the relative distance between them. When the position of the first connecting assembly remains unchanged, the relative distance between the first connector and the second connecting mechanism can be adjusted. When fine-tuning the relative distance between the first connector and the second connecting mechanism is required, simply rotating the first connector achieves the adjustment without needing to adjust the initial position of the traction module. This makes the connection operation of the pipe sample more convenient, the fine-tuning more precise and accurate, and improves testing efficiency.

[0006] According to an embodiment of the present invention, a pipe tensile testing machine includes a first connecting component, a first joint having a screw hole, and the connecting rod being threadedly connected to the screw hole.

[0007] According to an embodiment of the present invention, a pipe tensile testing machine includes a first joint comprising a nut connection portion and a screw hole disposed in the nut connection portion.

[0008] According to an embodiment of the present utility model, a pipe tensile testing machine includes a first connecting component and a pin. The connecting cylinder is provided with a first insertion hole in the radial direction, and the connecting rod is provided with a second insertion hole in the radial direction. The connecting rod can be movably inserted into the connecting cylinder. The first insertion hole and the second insertion hole can be matched and the pin can be inserted into the first insertion hole and the second insertion hole at the same time.

[0009] According to an embodiment of the present invention, a pipe tensile testing machine has a third insertion hole arranged radially on the connecting cylinder, and the third insertion hole is located above the first insertion hole.

[0010] According to an embodiment of the present invention, a pipe tensile testing machine includes a second connecting mechanism comprising a second connecting component and a second connector. The second connecting component is fixedly connected to the lower part of the frame, and the second connecting component and the second connector are detachably connected.

[0011] According to an embodiment of the present invention, a pipe tensile testing machine is provided with a first joint and a second joint, both of which are provided with snap-fit ​​grooves, and the openings of the two snap-fit ​​grooves are arranged facing each other.

[0012] According to an embodiment of the present invention, a pipe tensile testing machine has a paddle-shaped snap-fit ​​groove, which includes a square groove and two arc-shaped parts, with the two arc-shaped parts forming an opening.

[0013] According to an embodiment of the present invention, a pipe tensile testing machine further includes a tensile testing mechanism, which includes a tensile testing instrument disposed between the first joint and the output end of the traction module.

[0014] According to an embodiment of the present invention, a pipe tensile testing machine includes a display screen on a frame, which is electrically connected to the tensile testing instrument.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of a pipe tensile testing machine and a pipe sample according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the first connecting mechanism and the second connecting mechanism of a pipe tensile testing machine according to an embodiment of the present utility model; Figure 3 This is a schematic diagram of the internal structure of the first connecting mechanism of a pipe tensile testing machine according to an embodiment of the present invention; Figure 4 This is an exploded view of the first connecting mechanism of a pipe tensile testing machine according to an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures: Tensioning mechanism 100; frame 110; traction module 120; First connecting component 200; connecting cylinder 210; first insertion hole 211; third insertion hole 212; cylinder hole 213; pin 220; connecting rod 230; second insertion hole 231; First connector 300; Nut connection part 310; Screw hole 311; Second interconnecting component 400; Second connector 500; snap-fit ​​groove 510; square groove 511; arc-shaped part 512; Testing equipment 600; tensile testing machine 610; display 620; Pipe sample 700. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0019] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of a utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If the terms "first" and "second" are used, they are merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or the order of the indicated technical features.

[0021] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0022] Reference Figures 1 to 4 This utility model provides a pipe tensile testing machine, including a tensile mechanism 100, a first connecting mechanism, and a second connecting mechanism. The tensile mechanism 100 includes a frame 110 and a traction module 120, with the traction module 120 mounted on the frame 110. Specifically, the frame 110 is a frame structure. The traction module 120 includes a servo motor, a transmission chain, and a traction plate. The traction plate is connected to the servo motor via the transmission chain, and the servo motor drives the transmission chain to move, thereby moving the traction plate up and down. Specifically, the traction plate is located inside the frame structure frame 110, the transmission chain is located inside the two side support frames of the frame structure frame 110 (not shown in the figure), and the servo motor is located inside the bottom frame of the frame structure frame 110 (not shown in the figure).

[0023] The first connecting mechanism includes a first connecting component 200 and a first connector 300, which are threadedly connected. The first connecting component 200 is connected to a traction module 120, which drives the first connecting mechanism to move. Specifically, the first connecting component 200 is fixedly connected to a traction plate, and a servo motor drives the traction plate to move up and down via a transmission chain, thereby driving the first connecting component 200 and the first connector 300 to move up and down. The first connecting component 200 and the first connector 300 are threadedly connected, and rotating the first connector 300 relative to the first connecting component 200 adjusts the distance between the first connector 300 and the first connecting component 200.

[0024] The second connecting mechanism is located below the first connecting mechanism and is fixedly connected to the lower part of the frame 110. The first connecting mechanism and the second connecting mechanism are used to connect the upper and lower ends of the pipe sample 700, respectively.

[0025] The upper end of the pipe sample 700 is fixedly connected using a first connecting mechanism, and the lower end is fixedly connected using a second connecting mechanism. Then, the traction module 120 drives the first connecting mechanism upwards to move away from the second connecting mechanism, straightening the pipe sample 700 fixed between the first and second connecting mechanisms and allowing for tensile strength testing. The first connector 300 can rotate relative to the first connecting assembly 200, and the relative distance between them changes with the rotation of the thread, allowing adjustment of the relative distance. When the position of the first connecting assembly 200 remains unchanged, the relative distance between the first connector 300 and the second connecting mechanism can be adjusted. When fine-tuning the relative distance between the first connector 300 and the second connecting mechanism is required, simply rotating the first connector 300 achieves the adjustment without needing to adjust the initial position of the traction module 120, making operation more convenient, fine-tuning more precise, and improving testing efficiency.

[0026] According to some embodiments of this application, refer to Figure 3 and Figure 4 The first connecting assembly 200 includes a connecting rod 230 and a first connector 300 having a threaded hole 311. The connecting rod 230 is threaded into the threaded hole 311. Specifically, the connecting rod 230 has threads along its circumferential side. When the first connector 300 rotates relative to the connecting rod 230, the first connector 300 can rotate out or in along the threads of the connecting rod 230 to adjust the relative distance between the first connector 300 and the connecting rod 230. Optionally, refer to... Figure 4The lower part of the connecting rod 230 is provided with threads along the circumferential side, while the upper part of the connecting rod 230 is not provided with threads along the circumferential side; alternatively, the connecting rod 230 may also be provided with threads along all circumferential sides.

[0027] Furthermore, referring to Figure 4 The first connector 300 includes a nut connection portion 310, and a screw hole 311 is disposed in the nut connection portion 310 (the screw hole 311 is in Figure 4 (Represented by dashed lines). The nut connecting part 310 can be a hexagonal nut, square nut, octagonal nut, etc., and has a contact surface that is easy to turn with a wrench, and a screw hole 311 is provided in the middle. Turning the nut connecting part 310 with a wrench or other tools makes it easier to rotate the angle of the first joint 300 relative to the connecting rod 230, and makes it easier to apply force.

[0028] Furthermore, referring to Figure 3 and Figure 4 The first connecting assembly 200 further includes a connecting cylinder 210 and a pin 220. The connecting cylinder 210 has a first insertion hole 211 arranged radially, and the connecting rod 230 has a second insertion hole 231 arranged radially. The connecting rod 230 can be movably inserted into the connecting cylinder 210. The first insertion hole 211 and the second insertion hole 231 can be matched, and the pin 220 can pass through both the first insertion hole 211 and the second insertion hole 231 simultaneously. Specifically, the connecting cylinder 210 has a cylinder hole 213 inside, and the connecting rod 230 can be inserted into the cylinder hole 213 from the lower end of the cylinder hole 213 to realize the movable insertion between the connecting rod 230 and the connecting cylinder 210. Specifically, refer to... Figure 4 The second insertion hole 231 penetrates the connecting rod 230 radially. The connecting cylinder 210 is provided with two first insertion holes 211, which are arranged opposite to each other on both sides of the connecting cylinder 210 and extend to the cylinder hole 213. The connecting rod 230 is inserted into the connecting cylinder 210, and the first insertion hole 211 is aligned with the second insertion hole 231. Then, the pin 220 is simultaneously inserted into the first insertion hole 211 and the second insertion hole 231, which can realize the fixed connection between the first insertion hole 211, the second insertion hole 231 and the pin 220, thereby realizing the fixed connection between the connecting rod 230 and the connecting cylinder 210.

[0029] Furthermore, referring to Figure 3 and Figure 4The connecting cylinder 210 has a third insertion hole 212 arranged radially above the first insertion hole 211. Specifically, the connecting cylinder 210 has two third insertion holes 212, which are arranged opposite each other on both sides of the connecting cylinder 210 and extend through the cylinder hole 213. By moving the connecting rod 230 upward so that the second insertion hole 231 of the connecting rod 230 is aligned with the two third insertion holes 212, and then inserting the pin 220 into the third insertion hole 212 and the second insertion hole 231 at the same time, a fixed connection between the third insertion hole 212, the second insertion hole 231 and the pin 220 can be achieved, thereby greatly increasing the distance of the connecting rod 230 inserted into the connecting cylinder 210, which facilitates a large adjustment of the relative distance between the first connector 300 and the second connected assembly 400.

[0030] According to some embodiments of this application, refer to Figure 2 The second connecting mechanism includes a second connecting component 400 and a second connector 500. The second connecting component 400 is fixedly connected to the lower part of the frame 110, and the second connecting component 400 and the second connector 500 are detachably connected. Specifically, the second connector 500 is provided with a rod-shaped connecting structure with a through hole. The second connecting component 400 is provided with a cylindrical connecting structure and a connecting pin with a through hole. The second connector 500 can be inserted into the second connecting component 400, and the connecting pin passes through the through holes of both the second connector 500 and the second connecting component 400 simultaneously, thereby achieving a detachable connection between the second connector 500 and the second connecting component 400.

[0031] Furthermore, referring to Figure 2 Both the first connector 300 and the second connector 500 are provided with snap-fit ​​grooves 510, with the openings of the two snap-fit ​​grooves 510 facing each other. The pipe template 700 is generally designed as a paddle or fan shape, narrow in the middle and wide at both ends. The snap-fit ​​grooves 510 are used to snap the ends of the pipe template 700 to achieve a quick and secure connection. Specifically, both the first connector 300 and the second connector 500 are axially symmetrical. After rotating the first connector 300 by 180 degrees, the direction and angle of the snap-fit ​​grooves 510 of the first connector 300 remain the same as before.

[0032] Specifically, by rotating the nut connection part 310 of the first connector 300, the first connector 300 rotates together with the nut connection part 310, which can adjust the insertion depth between the connecting rod 230 and the nut connection part 310, thereby adjusting the relative distance between the first connector 300 and the second connector 500, and further adjusting the relative distance between the two snap-fit ​​grooves 510 to meet the connection requirements of pipe strips 700 of different lengths.

[0033] Furthermore, referring to Figures 1 to 4The snap-fit ​​groove 510 has a paddle-shaped structure, comprising a square groove portion 511 and two arc-shaped portions 512, which together form an opening. The paddle-shaped snap-fit ​​groove 510 is suitable for snap-fitting thermoplastic pipes, such as rigid PVC pipes, hydrogenated PVC pipes, and high-impact PVC pipe samples 700, improving convenience.

[0034] Furthermore, the two curved sections 512 have a radius of curvature of 13 mm to better accommodate the snap-fit ​​requirements of standard-sized thermoplastic tubing templates 700.

[0035] According to some embodiments of this application, refer to Figure 1 It also includes a tensile testing mechanism 600, which includes a tensile testing instrument 610, which is disposed between the first joint 300 and the output end of the traction module 120. Specifically, the tensile testing instrument 610 ( Figure 1 (Indicated by dashed lines) is positioned between the first joint 300 and the traction plate. The traction module 120 generates tension on the first joint 300 via the tension detector 610, and detects the tension on the pipe template 700 positioned between the first joint 300 and the second joint 500. Optionally, the tension detector 610 has a display module that can display the current tension. The tension on the pipe template 700 is the current tension on the tension detector 610 minus the weight of the first connecting mechanism.

[0036] Furthermore, the tensile testing mechanism 600 also includes a display 620, which is mounted on the frame 110 and electrically connected to the tensile testing instrument 610. The display 620 mounted on the frame 110 displays the tensile force exerted on the tubular sample 700 in real time, allowing the testing personnel to understand the test situation more intuitively and quickly, without the need for the testing personnel to bend down to look at the tensile testing instrument 610.

[0037] It is understood that, in some other embodiments, reference is made to... Figure 4 One of the first insertion holes 211 in the connecting cylinder 210 is provided with an internal thread, and the tail of the pin 220 is provided with an external thread, so as to realize the threaded connection of the pin 220 to the first insertion hole 211, to prevent the pin 220 from loosening during the test, and to improve the safety and reliability of the test.

[0038] Working principle: By rotating the adjusting nut connection part 310, the number of thread turns of the threaded connection between the connecting rod 230 and the nut connection part 310 is adjusted to adjust the relative distance between the first connector 300 and the second connector 500, thereby adjusting the relative distance between the two snap-fit ​​grooves 510. After the relative distance between the two snap-fit ​​grooves 510 is adjusted to a suitable range, the two ends of the tubular sample 700 are snapped into the two snap-fit ​​grooves 510. The servo motor is started to drive the first connector 300 upward through the transmission chain, straightening the tubular sample 700. The torque output of the servo motor is then adjusted to adjust the tension on the tubular sample 700. The tension data is detected by the detection mechanism 600, and combined with the changes in the structural shape of the tubular sample 700, it is determined whether the tubular sample 700 can withstand the specified tension.

[0039] It should be noted that the testing mechanism 600 may also include an extensometer (not shown in the figure), which is set between the frame 110 and the traction plate to measure the length change of the pipe sample 700 during the test.

[0040] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0041] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A pipe tensile testing machine, characterized in that, include: The tensioning mechanism (100) includes a frame (110) and a traction module (120), wherein the traction module (120) is disposed on the frame (110); The first connecting mechanism includes a first connecting component (200) and a first connector (300). The first connecting component (200) and the first connector (300) are threadedly connected. The first connecting component (200) is connected to the traction module (120). The traction module (120) is used to drive the first connecting mechanism to move. The second connecting mechanism is located below the first connecting mechanism and is fixedly connected to the lower part of the frame (110).

2. The pipe tensile testing machine according to claim 1, characterized in that, The first connecting component (200) includes a connecting rod (230), and the first connector (300) is provided with a screw hole (311). The connecting rod (230) is threadedly connected to the screw hole (311).

3. A pipe tensile testing machine according to claim 2, characterized in that, The first connector (300) includes a nut connection portion (310), and the screw hole (311) is provided in the nut connection portion (310).

4. A pipe tensile testing machine according to claim 2 or 3, characterized in that, The first connecting component (200) further includes a connecting cylinder (210) and a pin (220). The connecting cylinder (210) is provided with a first insertion hole (211) in the radial direction, and the connecting rod (230) is provided with a second insertion hole (231) in the radial direction. The connecting rod (230) can be movably inserted into the connecting cylinder (210). The first insertion hole (211) and the second insertion hole (231) can be matched. The pin (220) can pass through the first insertion hole (211) and the second insertion hole (231) at the same time.

5. A pipe tensile testing machine according to claim 4, characterized in that, The connecting cylinder (210) is provided with a third insertion hole (212) in the radial direction, and the third insertion hole (212) is located above the first insertion hole (211).

6. A pipe tensile testing machine according to claim 1, characterized in that, The second connection mechanism includes a second connecting component (400) and a second connector (500). The second connecting component (400) is fixedly connected to the lower part of the frame (110), and the second connecting component (400) and the second connector (500) are detachably connected.

7. A pipe tensile testing machine according to claim 6, characterized in that, Both the first connector (300) and the second connector (500) are provided with snap-fit ​​grooves (510), and the openings of the two snap-fit ​​grooves (510) are arranged facing each other.

8. A pipe tensile testing machine according to claim 7, characterized in that, The snap-fit ​​groove (510) has a paddle-shaped structure. The snap-fit ​​groove (510) includes a square groove (511) and two arc-shaped parts (512), and the two arc-shaped parts (512) together form the opening.

9. A pipe tensile testing machine according to claim 1, characterized in that, It also includes a tensile testing mechanism (600), which includes a tensile testing instrument (610) disposed between the first joint (300) and the output end of the traction module (120).

10. A pipe tensile testing machine according to claim 9, characterized in that, The tensile testing mechanism (600) also includes a display (620), which is mounted on the frame (110) and is electrically connected to the tensile testing instrument (610).

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