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

Abstract

The utility model discloses a high-voltage cable accessory spring pressure test tool at different temperatures, which belongs to the field of spring test tools and comprises a support, a force measurement assembly and an adjusting assembly, the support comprises a base and a beam which are arranged at intervals, the force measurement assembly is mounted on the base and provided with a pressure bearing portion for placing one end of a spring, and the adjusting assembly is mounted on the base. The force measuring assembly is used for displaying pressure borne by the pressure bearing part at different temperatures, the adjusting assembly comprises an adjusting screw rod and a first adjusting nut, the adjusting screw rod is installed on the cross beam, one end of the adjusting screw rod is close to the pressure bearing part and used for being sleeved with a spring, and the first adjusting nut is in threaded connection with the adjusting screw rod; when the first adjusting nut rotates relative to the adjusting screw rod, the distance between the first adjusting nut and the force measuring assembly can be changed so as to adjust the compression amount of the spring. The elastic force of different spring compression amounts can be measured, the change condition of the elastic force of the spring can be observed at different temperatures, the overall structure is simple, disassembly and assembly are convenient, and the cost is low.

Description

Technical Field

[0001] This utility model relates to the field of spring testing fixture technology, and in particular to a spring pressure testing fixture for high-voltage cable accessories at different temperatures. Background Technology

[0002] High-voltage cable accessory terminals are mainly divided into two structures: Japanese and European. Japanese terminals feature a specially designed spring tensioning device to maintain constant pressure between the stress cone and the cable interface. For Japanese terminals, numerous factors affect the performance of the cable-accessory interface, with the uncertainties caused by temperature and spring length variations being particularly significant. To accurately determine these parameters and improve the interface performance of cable accessories, in-depth experimental research is necessary. Therefore, studying the changes in spring force of high-voltage cable accessories under different temperatures is crucial for improving product operational stability.

[0003] A related technology discloses a spring force testing device for manufacturing metal springs, including a testing box, a spring, and an opening at the front end of the testing box. A pair of threaded rods are vertically arranged on the left and right sides inside the testing box. The upper ends of the threaded rods pass through the upper wall of the testing box and are connected to a motor, which is mounted on the upper end of the testing box. A slider is threadedly connected to the threaded rods and slides within the testing box. A moving block is clamped inside the testing box by a clamping mechanism. A pressure gauge is fixed at the center of the bottom wall of the testing box, and a mounting plate is fixed above the pressure gauge. The spring is installed between the moving block and the mounting plate. A measuring mechanism is installed on the right side of the front end of the moving block. The motor drives the threaded rods to rotate, which in turn moves the slider up and down, causing the moving block to compress the spring and measure the spring pressure. The structure is relatively complex and costly. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a spring pressure testing fixture for high-voltage cable accessories at different temperatures, solving the problem of complex structure and high cost in existing spring pressure testing fixtures.

[0005] A high-voltage cable accessory spring pressure testing fixture according to an embodiment of the present invention includes:

[0006] The support frame includes spaced-out bases and crossbeams;

[0007] A force measuring component is mounted on the base. The crossbeam and the force measuring component are spaced apart. The end of the force measuring component away from the base has a pressure bearing part for placing one end of the spring. The force measuring component is used to display the pressure on the pressure bearing part at different temperatures.

[0008] The adjustment assembly includes an adjustment screw and a first adjustment nut. The adjustment screw is mounted on the crossbeam, with one end of the adjustment screw located near the pressure-bearing part and used for the spring to be sleeved. The first adjustment nut is threadedly connected to the adjustment screw and is located between the crossbeam and the force-measuring assembly. The first adjustment nut is used to compress the other end of the spring and to change the distance between the first adjustment nut and the force-measuring assembly when rotating relative to the adjustment screw, thereby adjusting the spring compression. The direction from the base to the crossbeam and the pressure direction of the force-measuring assembly are consistent with the axial direction of the adjustment screw.

[0009] A high-voltage cable accessory spring pressure testing fixture according to an embodiment of the present invention has at least the following beneficial effects:

[0010] During testing, part of the spring is fitted onto the adjusting screw, which positions the spring and prevents it from slipping during measurement. Rotating the first adjusting nut changes the distance between it and the force-measuring component, thus adjusting the spring compression. The force-measuring component measures the spring force at different compression levels. Placing the device in environments with varying temperatures allows observation of changes in spring force under different conditions. The overall structure is relatively simple, easy to assemble and disassemble, and has a low cost.

[0011] According to some embodiments of the present invention, the adjusting assembly further includes a first washer, which is sleeved on the adjusting screw, abuts against the first adjusting nut, and is used for spring abutment.

[0012] According to some embodiments of the present invention, a limiting block is installed on the pressure-bearing part, and the limiting block is provided with a limiting groove for one end of the spring to extend into.

[0013] According to some embodiments of the present invention, a second gasket is installed on the pressure-bearing part, and the second gasket is located between the limiting block and the pressure-bearing part.

[0014] According to some embodiments of the present invention, the crossbeam is provided with a first connecting hole for the adjusting screw to pass through, the adjusting screw is fitted with two connecting nuts, and the crossbeam is located between the two connecting nuts.

[0015] According to some embodiments of the present invention, two connecting washers are sleeved on the adjusting screw, the two connecting washers are located between the two connecting nuts, and the crossbeam is located between the two connecting washers.

[0016] According to some embodiments of the present invention, two positioning grooves for placing the connecting gaskets are provided on opposite sides of the crossbeam, and the first connecting hole connects to the bottom walls of the two positioning grooves.

[0017] According to some embodiments of this utility model, the connecting gasket has various specifications, and the inner hole diameter of the connecting gasket with different specifications is different. The adjusting screw and the first adjusting nut have various specifications, and the diameter of the adjusting screw with different specifications is different. The inner diameter of the first adjusting nut with different specifications is different. The connecting gasket, the adjusting screw and the first adjusting nut can be interchanged to adapt to the testing of springs with different inner diameters.

[0018] According to some embodiments of this utility model, the bracket includes a connecting screw, a second adjusting nut, and a third adjusting nut. One end of the connecting screw is mounted on the base. A second connecting hole is provided on the crossbeam, and the connecting screw passes through the second connecting hole. The second adjusting nut and the third adjusting nut are both threadedly connected to the connecting screw. The crossbeam is located between the second adjusting nut and the third adjusting nut. The second adjusting nut and the third adjusting nut are used to adjust the distance between the crossbeam and the base when rotating relative to the connecting screw.

[0019] According to some embodiments of the present invention, the force measuring component includes an electronic scale.

[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0022] Figure 1 This is a schematic diagram of the structure of the high-voltage cable accessory spring pressure testing fixture under different temperatures according to an embodiment of this utility model;

[0023] Figure 2 This is a schematic diagram of the force measuring component of the high-voltage cable accessory spring pressure testing fixture under different temperatures according to an embodiment of this utility model.

[0024] Figure 3 This is a cross-sectional view of the crossbeam of the high-voltage cable accessory spring pressure testing fixture under different temperatures according to an embodiment of this utility model.

[0025] Figure 4 This is a schematic diagram of the high-voltage cable accessory spring pressure testing fixture and spring at different temperatures according to an embodiment of this utility model.

[0026] Icon labels:

[0027] 100, bracket; 110, base; 120, crossbeam; 121, first connecting hole; 122, positioning groove; 123, second connecting hole; 130, connecting screw; 140, second adjusting nut; 150, third adjusting nut;

[0028] 200. Force measuring component; 210. Pressure bearing part; 211. Second gasket; 212. Limiting block; 2121. Limiting groove;

[0029] 300. Adjusting assembly; 310. Adjusting screw; 311. Connecting nut; 312. Connecting washer; 320. First adjusting nut; 321. First washer;

[0030] 400. Spring. Detailed Implementation

[0031] 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.

[0032] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They 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, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] Please see Figure 1 , Figure 2 and Figure 4This utility model discloses a high-voltage cable accessory spring pressure testing fixture under different temperatures, comprising a support 100, a force measuring component 200, and an adjustment component 300. The support 100 includes a base 110 and a crossbeam 120, which are spaced apart. When the base 110 is placed on the ground, the crossbeam 120 is positioned above the base 110. The force measuring component 200 is mounted on the base 110, and the crossbeam 120 is spaced apart from the force measuring component 200. The end of the force measuring component 200 away from the base 110 has a pressure-bearing portion 210, which is used to place one end of a spring 400. The force measuring component 200 is used to display the pressure on the pressure-bearing portion 210 under different temperatures. The adjusting assembly 300 includes an adjusting screw 310 and a first adjusting nut 320. The adjusting screw 310 is mounted on the crossbeam 120, with one end of the adjusting screw 310 positioned near the pressure bearing portion 210. The adjusting screw 310 and the pressure bearing portion 210 are spaced apart. A portion of the spring 400 can be sleeved on the end of the adjusting screw 310 near the pressure bearing portion 210. The first adjusting nut 320 is threadedly connected to the adjusting screw 310 and is located between the crossbeam 120 and the force measuring assembly 200. The first adjusting nut 320 is used to compress the other end of the spring 400. When the first adjusting nut 320 rotates relative to the adjusting screw 310, the distance between the first adjusting nut 320 and the force measuring assembly 200 can be changed, thereby adjusting the compression of the spring 400. The direction from the base 110 to the crossbeam 120, the pressure direction of the force measuring component 200, and the axis of the adjusting screw 310 are all aligned. The base 110 is placed on the ground, and the direction from the base 110 to the crossbeam 120, the pressure direction of the force measuring component 200, and the axis of the adjusting screw 310 are all vertical.

[0035] During testing, a portion of the springs 400 are fitted onto the adjusting screw 310. The adjusting screw 310 positions the springs 400, preventing them from slipping during measurement. Rotating the first adjusting nut 320 changes the distance between it and the force-measuring component 200, thus adjusting the compression of the springs 400. The force-measuring component 200 measures the elastic force of the springs 400 at different compression levels. Placing the device in environments with varying temperatures allows observation of changes in the spring force of the springs 400 under different conditions. The overall structure is relatively simple, easy to assemble and disassemble, and has a low cost.

[0036] In some embodiments, see Figure 1 and Figure 4The adjusting assembly 300 also includes a first washer 321, which is sleeved on the adjusting screw 310 and abuts against the first adjusting nut 320. The first washer 321 is used for the spring 400 to abut against. The outer diameter of the first washer 321 is larger than the outer diameter of the adjusting nut and the outer diameter of the spring 400. By providing the first washer 321, the force-bearing area of ​​the spring 400 can be increased, making the force received and transmitted by the spring 400 more balanced.

[0037] In some embodiments, see Figure 1 , Figure 2 and Figure 4 A limiting block 212 is installed on the pressure-bearing part 210, and a limiting groove 2121 is provided on the limiting block 2121. During testing, one end of the spring 400 extends into the limiting groove 2121. The limiting groove 2121 facilitates the positioning and installation of the spring 400 and prevents the spring 400 from slipping during testing. It can also increase the force-bearing area of ​​the spring 400, making the force and force transmission of the spring 400 more balanced.

[0038] In some embodiments, see Figure 1 , Figure 2 and Figure 4 A second washer 211 is installed on the pressure-bearing part 210, and the second washer 211 is located between the limiting block 212 and the pressure-bearing part 210. The second washer 211 can increase the force-bearing area of ​​the spring 400, so that the force and force transmission of the spring 400 are more balanced.

[0039] In some embodiments, see Figure 1 and Figure 3 A first connecting hole 121 is provided on the crossbeam 120, and an adjusting screw 310 passes through the first connecting hole 121. Two connecting nuts 311 are sleeved on the adjusting screw 310, and the crossbeam 120 is located between the two connecting nuts 311. The connecting nuts 311 can securely install the adjusting screw 310 on the crossbeam 120. Rotating the connecting nuts 311 adjusts the position of the connecting nuts 311 on the adjusting screw 310, and can also change the length of the adjusting screw 310 extending out of the crossbeam 120 near the force measuring component 200.

[0040] In some embodiments, see Figure 1 and Figure 3 Two connecting washers 312 are fitted on the adjusting screw 310, and the two connecting washers 312 are located between the two connecting nuts 311. The crossbeam 120 is located between the two connecting washers 312. The connecting washers 312 are provided between the connecting nuts 311 and the crossbeam 120 to reduce the friction between the connecting nuts 311 and the crossbeam 120.

[0041] In some embodiments, see Figure 1 and Figure 3Two positioning grooves 122 are provided on opposite sides of the crossbeam 120. The connecting gasket 312 is installed in the positioning groove 122, and the first connecting hole 121 connects to the bottom wall of the two positioning grooves 122. The positioning grooves 122 ensure the positioning and installation of the connecting gasket 312.

[0042] In some embodiments, see Figure 1 and Figure 3 The connecting washer 312 comes in various specifications, with different inner diameters for different specifications. Similarly, the adjusting screw 310 and the first adjusting nut 320 also come in various specifications, with different diameters for different specifications. The connecting washer 312, adjusting screw 310, and first adjusting nut 320 can be interchanged to accommodate springs 400 with different inner diameters. Replacing the adjusting screw 310 with a different diameter and the corresponding first adjusting nut 320 with a different inner diameter, along with the connecting washer 312 with different inner diameters, allows for pressure measurement of springs 400 with different inner diameters.

[0043] In some embodiments, see Figure 1 and Figure 4 The bracket 100 includes a connecting screw 130, a second adjusting nut 140, and a third adjusting nut 150. One end of the connecting screw 130 is mounted on the base 110. A second connecting hole 123 is provided on the crossbeam 120, through which the connecting screw 130 passes. Both the second adjusting nut 140 and the third adjusting nut 150 are threadedly connected to the connecting screw 130. The crossbeam 120 is located between the second adjusting nut 140 and the third adjusting nut 150. The second adjusting nut 140 and the third adjusting nut 150 are used to adjust the distance between the crossbeam 120 and the base 110 when rotated relative to the connecting screw 130. Rotating the second adjusting nut 140 and the third adjusting nut 150 adjusts their positions on the connecting screw 130, thereby adjusting the distance between the crossbeam 120 and the base 110, accommodating pressure measurement of springs 400 of various lengths.

[0044] In some embodiments, see Figure 1 and Figure 4 The force measuring component 200 includes an electronic scale. The force measuring component 200 can also be a pressure gauge, and can also include a pressure sensor and a digital display device.

[0045] 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.

[0046] 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 fixture for testing the spring pressure of high-voltage cable accessories at different temperatures, characterized in that, include: The support frame includes spaced-out bases and crossbeams; A force measuring component is mounted on the base. The crossbeam and the force measuring component are spaced apart. The end of the force measuring component away from the base has a pressure bearing part for placing one end of the spring. The force measuring component is used to display the pressure on the pressure bearing part at different temperatures. The adjustment assembly includes an adjustment screw and a first adjustment nut. The adjustment screw is mounted on the crossbeam, with one end of the adjustment screw located near the pressure-bearing part and used for partially fitting a spring. The first adjustment nut is threadedly connected to the adjustment screw and is located between the crossbeam and the force-measuring assembly. The first adjustment nut is used to compress the other end of the spring and, when rotated relative to the adjustment screw, to change the distance between the first adjustment nut and the force-measuring assembly to adjust the spring compression. The direction from the base to the crossbeam, the pressure direction of the force-measuring assembly, and the axial direction of the adjustment screw are consistent.

2. The high-voltage cable accessory spring pressure testing fixture according to claim 1, characterized in that, The adjusting assembly further includes a first washer, which is sleeved on the adjusting screw and abuts against the first adjusting nut. The first washer is used for spring abutment.

3. The high-voltage cable accessory spring pressure testing fixture according to claim 1, characterized in that, A limiting block is installed on the pressure-bearing part, and the limiting block is provided with a limiting groove for one end of the spring to extend into.

4. The high-voltage cable accessory spring pressure testing fixture according to claim 3, characterized in that, A second gasket is installed on the pressure-bearing part, and the second gasket is located between the limiting block and the pressure-bearing part.

5. The high-voltage cable accessory spring pressure testing fixture according to claim 1, characterized in that, The crossbeam is provided with a first connecting hole for the adjusting screw to pass through, and two connecting nuts are sleeved on the adjusting screw, with the crossbeam located between the two connecting nuts.

6. The high-voltage cable accessory spring pressure testing fixture according to claim 5, characterized in that, Two connecting washers are fitted on the adjusting screw, and the two connecting washers are located between the two connecting nuts. The crossbeam is located between the two connecting washers.

7. The high-voltage cable accessory spring pressure testing fixture according to claim 6, characterized in that, Two positioning grooves for placing the connecting gaskets are provided on opposite sides of the crossbeam, and the first connecting hole connects to the bottom wall of the two positioning grooves.

8. The high-voltage cable accessory spring pressure testing fixture according to claim 6, characterized in that, The connecting gaskets come in various specifications, with different inner hole diameters for different specifications. The adjusting screw and the first adjusting nut also come in various specifications, with different diameters for different specifications of the adjusting screw and different inner diameters for different specifications of the first adjusting nut. The connecting gaskets, adjusting screws, and the first adjusting nut can be interchanged to accommodate tests of springs with different inner diameters.

9. The high-voltage cable accessory spring pressure testing fixture according to claim 1, characterized in that, The bracket includes a connecting screw, a second adjusting nut, and a third adjusting nut. One end of the connecting screw is mounted on the base. A second connecting hole is provided on the crossbeam, through which the connecting screw passes. The second adjusting nut and the third adjusting nut are both threadedly connected to the connecting screw. The crossbeam is located between the second adjusting nut and the third adjusting nut. The second adjusting nut and the third adjusting nut are used to adjust the distance between the crossbeam and the base when the crossbeam rotates relative to the connecting screw.

10. The high-voltage cable accessory spring pressure testing fixture according to claim 1, characterized in that, The force measuring component includes an electronic scale.

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