Tool for testing spring tension of high-voltage cable accessory at different temperatures

Abstract

The utility model discloses a high-voltage cable accessory spring tension testing tool under different temperatures, which belongs to the field of spring testing tools and comprises a support, a force measuring assembly, a first connecting assembly, an adjusting assembly and a second connecting assembly. The force measuring assembly is used for displaying tensile forces under different temperatures, the first connecting assembly is connected with one end of the spring and the force measuring assembly, the adjusting assembly comprises an adjusting screw rod and an adjusting nut, the adjusting screw rod is installed on the cross beam, the adjusting nut is in threaded connection with the adjusting screw rod, and the second connecting assembly is connected with the other end of the spring. The adjusting screw penetrates through the second connecting assembly, and when the adjusting nut rotates relative to the adjusting screw, the distance between the adjusting nut and the force measuring assembly can be changed so as to adjust the elongation of the spring. The tension of different spring expansion and contraction amounts can be measured, the change condition of the spring elasticity can be observed at different temperatures, the structure is simple, and disassembly and assembly are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of spring testing tooling, in particular to a tooling for testing the tension of a high-voltage cable accessory spring at different temperatures. Background Art

[0002] High-voltage cable accessory terminals are primarily available in two designs: Japanese and European. Japanese-style terminals incorporate a specially designed spring-loaded mechanism to maintain constant pressure between the stress cone and the cable interface. Numerous factors influence the performance of the cable-accessory interface, with temperature and spring length variations being particularly significant. Accurately determining these parameters and improving the interface performance of cable accessories requires in-depth experimental research. Therefore, studying the variation in spring force in high-voltage cable accessories at different temperatures is crucial for improving product operational stability.

[0003] A related art discloses a spring force testing device for production, comprising a base plate, a fixed seat and a mounting frame fixedly mounted on the upper end of the base plate, a first cavity formed at the upper end of the fixed seat, a second cavity formed within the fixed seat, the first cavity and the second cavity being connected, a bidirectional screw rotatably mounted within the second cavity, a pair of movable members being threadedly connected to the surface of the bidirectional screw, the two movable members being respectively disposed on two threads of the bidirectional screw, the upper ends of the movable members being fixedly connected to a fixed rod, a threaded screw rotatably mounted within the mounting frame, a movable plate being threadedly connected to the surface of the threaded screw, a lifting plate being fixedly connected to the front end of the movable plate, a pair of sliding grooves formed at the lower end of the lifting plate, a slider being slidably mounted within the sliding grooves, the lower ends of the sliders being fixedly connected to a connecting member, the lower ends of the connecting member being fixedly mounted to a fixed column, a connecting hook being rotatably mounted at the lower end of the fixed column, a tension sensor being fixedly mounted within the fixed column, the tension sensor being electrically connected to a display screen. This spring tension testing device has a relatively complex structure and is relatively expensive. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a spring tension test fixture for high-voltage cable accessories at different temperatures, which solves the problems of the prior art spring tension test device, which is relatively complex in structure and high in cost.

[0005] According to an embodiment of the present invention, a tool for testing the spring tension of high-voltage cable accessories at different temperatures includes:

[0006] a bracket, comprising a base and crossbeams arranged at intervals;

[0007] a force measuring assembly mounted on the base, the crossbeam being spaced apart from the force measuring assembly, the force measuring assembly having a tension portion at one end away from the base, and the force measuring assembly being used to display the tension exerted on the tension portion at different temperatures;

[0008] A first connecting component is used to connect one end of the spring, and the first connecting component is connected to the tension part;

[0009] An adjusting assembly, comprising an adjusting screw and an adjusting nut, wherein the adjusting screw is mounted on the crossbeam, the adjusting nut is threadedly connected to the adjusting screw, and the adjusting nut is located between the crossbeam and the force measuring assembly, and the direction from the base to the crossbeam and the tensile direction of the force measuring assembly are consistent with the axial direction of the adjusting screw;

[0010] The second connecting component is used to connect the other end of the spring. The second connecting component has a connecting portion, and a first connecting hole is provided on the connecting portion. The adjusting screw is passed through the first connecting hole. The connecting portion is located on the side of the adjusting nut away from the base. The adjusting nut is used to change the distance between the adjusting nut and the force measuring component when rotating relative to the adjusting screw to adjust the elongation of the spring.

[0011] According to an embodiment of the present invention, a tool for testing the spring tension of high-voltage cable accessories at different temperatures has at least the following beneficial effects:

[0012] When testing a spring, one end of the spring is connected to the force-measuring assembly via a first connecting assembly, and the other end is connected to a second connecting assembly, which is mounted on an adjusting screw. Turning the adjusting nut changes the distance between the adjusting nut and the force-measuring assembly, thereby adjusting the spring's elongation. This allows for flexible adjustment of the spring's elongation, measuring the tension at different spring extensions. By testing the device in environments with varying temperatures, the changes in spring force can be observed at varying temperatures. The overall structure is relatively simple, allowing for easy assembly and disassembly, and it can measure the tension performance of springs of various specifications at a low cost.

[0013] According to some embodiments of the present invention, the first connecting assembly includes a cable tie, which connects one end of the spring and the tension portion.

[0014] According to some embodiments of the present invention, the first connecting assembly further includes a connecting block, the connecting block being used to connect one end of the spring, and the connecting block being provided with a second connecting hole for the cable tie to pass through.

[0015] According to some embodiments of the present invention, the first connecting assembly also includes a stop pin, the connecting block is provided with a limiting groove for one end of the spring to extend into, the connecting block is provided with a mounting hole passing through the inner wall of the limiting groove, the end of the stop pin is installed in the mounting hole, and the stop pin is used to limit one end of the spring within the limiting groove.

[0016] According to some embodiments of the present invention, two of the adjusting screws and two of the adjusting nuts are provided, and two connecting parts of the second connecting assembly are provided. The two connecting parts are respectively sleeved on the two adjusting screws, and the two connecting parts of the second connecting assembly are located at the two ends of the length direction of the second connecting assembly, and the middle part of the second connecting assembly is used to connect the other end of the spring.

[0017] According to some embodiments of the present invention, the second connecting assembly includes a connecting plate, two first connecting holes are provided at both ends of the connecting plate along the length direction of the connecting plate, and the middle part of the connecting plate is used to connect the other end of the spring.

[0018] According to some embodiments of the present invention, a third connecting hole for the adjusting screw to pass through is provided on the crossbeam, two connecting nuts are sleeved on the adjusting screw, and the crossbeam is located between the two connecting nuts.

[0019] According to some embodiments of the present invention, the bracket further includes a connecting rod, and two ends of the connecting rod are respectively connected to the base and the crossbeam.

[0020] According to some embodiments of the present invention, the bracket further includes a retaining piece, which is installed on the connecting rod, the retaining piece abuts against the force measuring assembly, and the retaining piece is used to limit the force measuring assembly on the base.

[0021] According to some embodiments of the present invention, the force measuring component is an electronic crane scale.

[0022] Additional aspects and advantages of the present invention will be described in part in the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0024] Figure 1 Schematic diagram of the structure of the high-voltage cable accessory spring tension test tool at different temperatures according to an embodiment of the present invention;

[0025] Figure 2 A cross-sectional view of a second connecting assembly of a high-voltage cable accessory spring tension test fixture at different temperatures according to an embodiment of the present invention;

[0026] Figure 3 This is a cross-sectional view of a beam of a high-voltage cable accessory spring tension test fixture at different temperatures according to an embodiment of the present invention;

[0027] Figure 4 This is a structural schematic diagram of a high-voltage cable accessory spring tension test fixture and a spring at different temperatures according to an embodiment of the utility model.

[0028] Figure Number:

[0029] 100, bracket; 110, base; 120, beam; 121, third connecting hole; 130, connecting rod; 131, positioning piece;

[0030] 200, force measuring assembly; 210, tension part;

[0031] 300, first connecting assembly; 310, cable tie; 320, connecting block; 321, second connecting hole; 322, limiting groove; 330, stop pin;

[0032] 400, adjustment assembly; 410, adjustment screw; 411, connecting nut; 420, adjustment nut;

[0033] 500, second connecting assembly; 510, connecting portion; 511, first connecting hole;

[0034] 600. Spring. DETAILED DESCRIPTION

[0035] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0037] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0038] See also Figure 1 、 Figure 2 and Figure 4 , an embodiment of the utility model provides a spring tension test fixture for high-voltage cable accessories at different temperatures, comprising a bracket 100, a force measuring assembly 200, a first connecting assembly 300, an adjustment assembly 400, and a second connecting assembly 500. The bracket 100 comprises a base 110 and a crossbeam 120, the base 110 and the crossbeam 120 being spaced apart. When the base 110 is placed on the ground, the crossbeam 120 is located above the base 110. The force measuring assembly 200 is mounted on the base 110, and the crossbeam 120 is spaced apart from the force measuring assembly 200. The force measuring assembly 200 has a tension portion 210 at one end away from the base 110, and the force measuring assembly 200 is used to display the tension exerted on the tension portion 210 at different temperatures. The first connecting assembly 300 connects one end of the spring 600 and the tension portion 210. The adjustment assembly 400 includes an adjustment screw 410 and an adjustment nut 420 . The adjustment screw 410 is mounted on the beam 120 . The adjustment nut 420 is threadedly connected to the adjustment screw 410 . The adjustment nut 420 is located between the beam 120 and the force measuring assembly 200 .

[0039] The direction from the base 110 to the crossbeam 120, the tension direction of the force-measuring assembly 200, and the axial direction of the adjusting screw 410 are aligned. The base 110 is placed on the ground, and the direction from the base 110 to the crossbeam 120, the tension direction of the force-measuring assembly 200, and the axial direction of the adjusting screw 410 are all vertical. A second connecting assembly 500 is connected to the other end of the spring 600. The second connecting assembly 500 includes a connecting portion 510, which is provided with a first connecting hole 511. The adjusting screw 410 is inserted into the first connecting hole 511. The connecting portion 510 is located on the side of the adjusting nut 420 away from the base 110. When the adjusting nut 420 rotates relative to the adjusting screw 410, the distance between the adjusting nut 420 and the force-measuring assembly 200 can be changed. The adjusting nut 420 can push the connecting portion 510 to move, thereby adjusting the distance between the connecting portion 510 and the force-measuring assembly 200, thereby adjusting the elongation of the spring 600.

[0040] When testing the spring 600, one end of the spring 600 is connected to the force measuring assembly 200 via the first connecting assembly 300, and the other end of the spring 600 is connected to the second connecting assembly 500, which is sleeved on the adjusting screw 410. By rotating the adjusting nut 420, the distance between the adjusting nut 420 and the force measuring assembly 200 is changed, thereby adjusting the elongation of the spring 600. The elongation of the spring 600 can be freely adjusted, and the tension of different spring 600 extensions can be measured. The device is placed in an environment with different temperatures for testing, and the changes in the elastic force of the spring 600 can be observed at different temperatures. The overall structure is relatively simple, easy to disassemble and assemble, and can measure the tension performance of springs 600 of various specifications at a low cost.

[0041] In some embodiments, see Figure 1 and Figure 4 The first connecting assembly 300 includes a cable tie 310, which connects one end of the spring 600 and the tension part 210. The cable tie 310 is used to fix one end of the spring 600 to the tension part 210 to ensure stable installation of the spring 600. The cable tie 310 can also be replaced by a rope.

[0042] In some embodiments, see Figure 1 and Figure 4 The first connecting assembly 300 also includes a connecting block 320, which is connected to one end of the spring 600. The connecting block 320 is provided with a second connecting hole 321, through which the cable tie 310 is connected to the connecting block 320. The cable tie 310 is connected to one end of the spring 600 via the connecting block 320. The connecting block 320 can connect the entire end of the spring 600, ensuring that the spring 600 is evenly stressed.

[0043] In some embodiments, see Figure 1 and Figure 4 The first connecting assembly 300 further includes a stop pin 330. A limiting groove 322 is provided on the connecting block 320. One end of the spring 600 extends into the limiting groove 322. A mounting hole is provided on the connecting block 320. The mounting hole passes through the inner wall of the limiting groove 322. The end of the stop pin 330 is mounted in the mounting hole. The stop pin 330 is used to limit one end of the spring 600 within the limiting groove 322. The limiting groove 322 ensures the positioning and installation of the spring 600. After the spring 600 extends into the limiting groove 322, the stop pin 330 is then used to fix one end of the spring 600, preventing the spring 600 from slipping out.

[0044] In some embodiments, see Figure 1 、 Figure 2 and Figure 4Two adjusting screws 410 and two adjusting nuts 420 are provided. The second connecting assembly 500 has two connecting portions 510, each of which is sleeved onto the two adjusting screws 410. The two connecting portions 510 of the second connecting assembly 500 are located at both ends of the second connecting assembly 500 in its longitudinal direction, and the middle portion of the second connecting assembly 500 is used to connect to the other end of the spring 600. The provision of two adjusting screws 410 and adjusting nuts 420 ensures that the two connecting portions 510 of the second connecting assembly 500 are evenly stressed and that the tension exerted by the middle portion of the second connecting assembly 500 on the spring 600 is stable. The two adjusting nuts 420 rotate simultaneously to adjust the distance between the second connecting assembly 500 and the force measuring assembly 200, thereby adjusting the elongation of the spring 600.

[0045] In some embodiments, see Figure 1 、 Figure 2 and Figure 4 The second connecting component 500 includes a connecting piece, and two first connecting holes 511 are provided at both ends of the connecting piece along the length direction of the connecting piece. The middle part of the connecting piece is used to connect the other end of the spring 600. The connecting piece can be directly clamped on the spring 600, which is convenient for disassembly and assembly.

[0046] In some embodiments, see Figure 1 and Figure 3 The crossbeam 120 is provided with a third connecting hole 121, through which the adjusting screw 410 is inserted. Two connecting nuts 411 are sleeved on the adjusting screw 410, and the crossbeam 120 is located between the two connecting nuts 411. The connecting nuts 411 securely mount the adjusting screw 410 on the crossbeam 120. By rotating the connecting nuts 411 to adjust the position of the connecting nuts 411 on the adjusting screw 410, the length of the adjusting screw 410 extending from the side of the crossbeam 120 near the force measuring assembly 200 can be changed to accommodate tension tests on springs 600 of different lengths.

[0047] In some embodiments, see Figure 1 and Figure 4 The bracket 100 further includes a connecting rod 130, the two ends of which are respectively connected to the base 110 and the crossbeam 120. The connecting rod 130 can be a screw rod, which assembles the base 110 and the crossbeam 120 together through a nut.

[0048] In some embodiments, see Figure 1 and Figure 4Bracket 100 further includes a retaining piece 131 mounted on connecting rod 130. Retaining piece 131 abuts against force-measuring assembly 200 and is used to restrain force-measuring assembly 200 on base 110. Retaining piece 131 is fixed to connecting rod 130, restricting force-measuring assembly 200 from moving away from base 110, ensuring stable installation of force-measuring assembly 200 and ensuring the accuracy of force-measuring assembly 200 measurements.

[0049] In some embodiments, see Figure 1 and Figure 4 The force measuring assembly 200 is an electronic crane scale. The force measuring assembly 200 can also be a dynamometer, and the force measuring assembly 200 can also include a tension sensor and a digital display device.

[0050] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does 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 any one or more embodiments or examples.

[0051] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A tool for testing the spring tension of high-voltage cable accessories at different temperatures, characterized by: include: a bracket, comprising a base and crossbeams arranged at intervals; a force measuring assembly mounted on the base, the crossbeam being spaced apart from the force measuring assembly, the force measuring assembly having a tension portion at one end away from the base, and the force measuring assembly being used to display the tension exerted on the tension portion at different temperatures; A first connecting component is used to connect one end of the spring, and the first connecting component is connected to the tension part; An adjusting assembly, comprising an adjusting screw and an adjusting nut, wherein the adjusting screw is mounted on the crossbeam, the adjusting nut is threadedly connected to the adjusting screw, and the adjusting nut is located between the crossbeam and the force measuring assembly, and the direction from the base to the crossbeam and the tensile direction of the force measuring assembly are consistent with the axial direction of the adjusting screw; The second connecting component is used to connect the other end of the spring. The second connecting component has a connecting portion, and a first connecting hole is provided on the connecting portion. The adjusting screw is passed through the first connecting hole. The connecting portion is located on the side of the adjusting nut away from the base. The adjusting nut is used to change the distance between the adjusting nut and the force measuring component when rotating relative to the adjusting screw to adjust the elongation of the spring.

2. The tool for testing the spring tension of high-voltage cable accessories at different temperatures according to claim 1, characterized in that: The first connecting assembly includes a cable tie, which is connected to the tensioned portion and is used to connect one end of the spring.

3. The tool for testing the spring tension of high-voltage cable accessories at different temperatures according to claim 2, characterized in that: The first connecting assembly further includes a connecting block, which is used to connect one end of the spring. The connecting block is provided with a second connecting hole for the cable tie to pass through.

4. The tool for testing the spring tension of high-voltage cable accessories at different temperatures according to claim 3, characterized in that: The first connecting assembly also includes a stop pin, and the connecting block is provided with a limiting groove for one end of the spring to extend into, and the connecting block is provided with a mounting hole that passes through the inner wall of the limiting groove, and the end of the stop pin is installed in the mounting hole, and the stop pin is used to limit one end of the spring in the limiting groove.

5. The tool for testing the spring tension of high-voltage cable accessories at different temperatures according to claim 1, characterized in that: There are two adjusting screws and two adjusting nuts, and there are two connecting parts of the second connecting component. The two connecting parts are respectively mounted on the two adjusting screws. The two connecting parts of the second connecting component are located at both ends of the length direction of the second connecting component, and the middle part of the second connecting component is used to connect the other end of the spring.

6. The tool for testing the spring tension of high-voltage cable accessories at different temperatures according to claim 1, characterized in that: The second connecting component includes a connecting piece. Two first connecting holes are provided at both ends of the connecting piece along the length direction of the connecting piece. The middle portion of the connecting piece is used to connect to the other end of the spring.

7. The tool for testing the spring tension of high-voltage cable accessories at different temperatures according to claim 1, characterized in that: The crossbeam is provided with a third connecting hole for the adjusting screw to pass through, the adjusting screw is sleeved with two connecting nuts, and the crossbeam is located between the two connecting nuts.

8. The tool for testing the spring tension of high-voltage cable accessories at different temperatures according to claim 1, characterized in that: The bracket further includes a connecting rod, with two ends of the connecting rod respectively connected to the base and the crossbeam.

9. The tool for testing the spring tension of high-voltage cable accessories at different temperatures according to claim 8, characterized in that: The bracket further comprises a retaining piece, which is mounted on the connecting rod and abuts against the force-measuring assembly, and is used to restrict the force-measuring assembly on the base.

10. The tool for testing the spring tension of high-voltage cable accessories at different temperatures according to claim 1, characterized in that: The force measuring component is an electronic crane scale.

Images