Auxiliary device for wire and cable power frequency alternating current withstand voltage test

Abstract

The utility model relates to the technical field of wire and cable testing, in particular to an auxiliary device for a wire and cable power frequency alternating current withstand voltage test, which comprises a base, stand columns are arranged on two sides of the top of the base, a multi-point support is mounted between the top ends of the stand columns, and a plurality of positioning sleeves are uniformly embedded in the multi-point support. A positioning shaft is vertically inserted into the positioning sleeve in a penetrating mode, a fixing block is arranged at the bottom end of the positioning shaft, fasteners are symmetrically arranged at the bottom of the fixing block, the top end of each fastener set is connected with the bottom of the fixing block through a stretching adjusting mechanism, and auxiliary clamps are symmetrically arranged on the front side and the rear side of each fastener set. According to the auxiliary device for the wire and cable power frequency alternating current withstand voltage test, through the design of a multi-point supporting structure and a fastener, the accuracy and reliability of a test result are improved, the auxiliary device can adapt to wires and cables with different lengths and diameters, the operation process is simplified, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of wire and cable testing technology, specifically an auxiliary device for power frequency AC withstand voltage testing of wires and cables. Background Technology

[0002] With the rapid development of the power industry, the safety and reliability of wires and cables, as a crucial component of power transmission, have received increasing attention. To ensure the performance of wires and cables in practical applications, the power frequency AC withstand voltage test has become an indispensable testing method. This test applies an AC voltage higher than the normal operating voltage to detect the insulation performance of wires and cables, thereby ensuring their safe operation under various harsh environments.

[0003] Existing power frequency AC withstand voltage testing equipment for wires and cables sometimes requires suspending the cables on the testing platform during testing. However, existing support devices are mostly simple bracket structures, which are prone to instability during prolonged high-voltage testing. This can cause the wires and cables to sway, shift, or even detach during testing, affecting the accuracy of the test results and potentially leading to safety accidents. Furthermore, existing support devices cannot be adjusted for different lengths and diameters of wires and cables, requiring frequent replacements when testing different specifications, increasing operational complexity and workload. Utility Model Content

[0004] The purpose of this utility model is to provide an auxiliary device for power frequency AC withstand voltage testing of wires and cables, so as to solve the problems mentioned in the background art of unstable conductor suspension support and lack of flexibility in current power frequency AC withstand voltage testing equipment for wires and cables during testing.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an auxiliary device for power frequency AC withstand voltage testing of wires and cables, comprising a base, with columns on both sides of the top of the base, a multi-point bracket installed between the tops of the columns, a plurality of positioning sleeves uniformly fitted inside the multi-point bracket, a positioning shaft vertically inserted inside the positioning sleeve, a fixed block at the bottom of the positioning shaft, fasteners symmetrically arranged at the bottom of the fixed block, the top of each group of fasteners being connected to the bottom of the fixed block through a tension adjustment mechanism, and auxiliary clamps symmetrically arranged on the front and rear sides of each group of fasteners, the auxiliary clamps being used to assist in clamping the wires and cables after the fasteners are fixed.

[0006] Preferably, the tension adjustment mechanism includes a horizontal shaft, a tension spring, and an adjusting nut. The horizontal shaft is horizontally fixed to the bottom of the solid block by a support block. The top ends of the fasteners are movably sleeved on the outside of the horizontal shaft. The tension spring is sleeved on the outside of the middle of the horizontal shaft. The adjusting nut is sleeved on the outside of both ends of the horizontal shaft by a threaded structure.

[0007] Preferably, the bottom of the fastener is fixed with a fixed sleeve, and a connecting shaft is inserted inside the fixed sleeve, and the auxiliary clamps are respectively fixed to the top of both ends of the connecting shaft.

[0008] Preferably, spring plates are connected between the front and rear ends of the connecting shaft in the same group, and the spring plates are in a "V" shape.

[0009] Preferably, a stabilizing sleeve is provided at the top of the connection between the multi-point bracket and the positioning sleeve, and a damping ring is provided on the outer side of the upper end of the positioning shaft, and an movable groove that cooperates with the damping ring structure is provided on the inner wall of the stabilizing sleeve.

[0010] Preferably, the front end of the multi-point bracket and the corresponding position of the front side of the positioning sleeve are provided with notches, and the outer wall of the front end of the positioning sleeve is connected with a tightening bolt by a threaded structure.

[0011] Compared with existing technologies, the beneficial effects of this utility model are as follows: This auxiliary device for power frequency AC withstand voltage testing of wires and cables improves the accuracy and reliability of test results through the design of a multi-point support structure and fasteners. It can also adapt to wires and cables of different lengths and diameters, simplifying the operation process and improving work efficiency. The multi-point support of this device can be pre-adjusted to a suitable height position on the base via two columns. The vertical insertion and movement of the positioning shaft within the positioning sleeve allows the height of each set of fasteners to be adjusted individually. Combined with the tension adjustment mechanism, this enables flexible adjustment of the fasteners to adapt to different specifications of wires and cables. Simultaneously, the auxiliary clamp further enhances the stability of the wires and cables, ensuring their stability during high-voltage testing. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of an auxiliary device for power frequency AC withstand voltage testing of wires and cables according to the present invention.

[0013] Figure 2 This utility model relates to an auxiliary device for power frequency AC withstand voltage testing of wires and cables. Figure 1 Enlarged structural diagram at point A in the middle;

[0014] Figure 3 This is a schematic diagram of the connection structure between the auxiliary clamp and fastener of an auxiliary device for power frequency AC withstand voltage testing of wires and cables according to this utility model.

[0015] Figure 4 This is a top view schematic diagram of the multi-point support structure of an auxiliary device for power frequency AC withstand voltage testing of wires and cables according to this utility model.

[0016] In the diagram: 1. Base; 2. Column; 3. Multi-point bracket; 4. Positioning sleeve; 5. Positioning shaft; 6. Fixed block; 7. Fastener; 8. Auxiliary clamp; 9. Stabilizing sleeve; 10. Damping ring; 11. Horizontal shaft; 12. Tension spring; 13. Adjusting nut; 14. Fixed sleeve; 15. Connecting shaft; 16. Spring plate. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-4This utility model provides a technical solution: an auxiliary device for power frequency AC withstand voltage testing of wires and cables, including a base 1 with mounting holes for installing the device in a suitable position. Columns 2 are welded and fixed to both sides of the top of the base 1. Multi-point supports 3 are installed between the tops of the columns 2. The multi-point supports 3 are horizontally distributed, and both ends are fitted onto the outside of the columns 2 via connecting sleeves and screws. Several positioning sleeves 4 are uniformly fixed and embedded inside the multi-point supports 3. Positioning shafts 5 are vertically inserted into the inside of the positioning sleeves 4. A fixed block 6 is welded and fixed to the bottom of the positioning shaft 5. Fasteners 7 are symmetrically arranged at the bottom of the fixed blocks 6. The fasteners 7 are all arc-shaped structures with soft pads adhered to their inner walls. The top of each group of fasteners 7 is adjusted by a tension adjustment machine. The fastener 7 is connected to the bottom of the fixed block 6, and each set of fasteners 7 has symmetrical auxiliary clamps 8 on both the front and rear sides. The inner side of the auxiliary clamp 8 has an arc-shaped clamping opening. The auxiliary clamp 8 is used to assist in clamping the wires and cables after the fasteners 7 are fixed. This multi-point support 3 can be pre-adjusted to a suitable height position on the base 1 by means of two columns 2. Each positioning shaft 5 can be vertically inserted and fixed in the positioning sleeve 4 to adjust the height position of the corresponding set of fasteners 7 individually. At the same time, the relative position of each set of fasteners 7 can be adjusted by the tension adjustment mechanism to accommodate wires and cables of different lengths and diameters, reducing the need for frequent replacement of support devices. The auxiliary clamp 8 is used to assist in clamping the wires and cables after the fasteners 7 are fixed, thereby effectively preventing electric shock. This device prevents the wires and cables from shaking or shifting during high-voltage testing, improving the accuracy and reliability of test results. It solves the problems of unstable conductor support and lack of flexibility in current power frequency AC withstand voltage testing equipment for wires and cables, thereby enhancing testing safety and efficiency. The tension adjustment mechanism includes a horizontal shaft 11, a tension spring 12, and an adjusting nut 13. The horizontal shaft 11 is horizontally fixed to the bottom of the fixed block 6 by a support block. The top parts of the fasteners 7 are movably sleeved on the outside of the horizontal shaft 11. The tension spring 12 is sleeved on the outside of the middle of the horizontal shaft 11. Both ends of the tension spring 12 are connected to the corresponding side of the top of the fasteners 7 in the same group. The outer walls at both ends of the horizontal shaft 11 are provided with a threaded structure. The adjusting nut 13 is connected via the threaded structure. On the outside of both ends of the horizontal axis 11, when it is necessary to adjust the relative position of each set of fasteners 7 to accommodate wires and cables of different diameters, the operator can rotate the adjusting nut 13. The adjusting nut 13 moves outside the two ends of the horizontal axis 11 through the threaded structure, thereby causing the fasteners 7 to slide along the horizontal axis 11 and change the distance between them. The tension spring 12 provides the necessary elastic force in this process to ensure that the fasteners 7 can fit tightly against the wires and cables. At the same time, the auxiliary clamp 8 further enhances the clamping stability of the wires and cables. Thus, it can not only quickly adjust the position of the fasteners 7 to accommodate wires and cables of different diameters, but also improve the stability of the wires and cables during high-voltage testing and reduce the risk of wire and cable shaking or displacement. The bottom of the fastener 7 is welded and fixed with a retaining sleeve 14.Furthermore, a connecting shaft 15 is inserted inside the fixed sleeve 14, and auxiliary clips 8 are welded and fixed to the top of both ends of the connecting shaft 15. Spring plates 16 are connected between the front and rear ends of the same group of connecting shafts 15. The connection between the spring plates 16 and the connecting shaft 15 is welded and fixed. The spring plates 16 have a "V" shaped structure. Each set of auxiliary clips 8 can be twisted under the action of the spring plates 16, and the connecting shaft 15 will also be affected by the fixed sleeve 14. The internal rotation is coordinated until each set of auxiliary clamps 8 closes together, clamping the front and rear sides of the wire and cable fixed by the fastener 7, thereby further enhancing the clamping stability of the wire and cable, preventing the wire and cable from shaking or shifting during high-voltage testing, and ensuring the accuracy and reliability of the test results. A stabilizing sleeve 9 is provided at the top of the connection between the multi-point bracket 3 and the positioning sleeve 4, and a damping ring 10 is provided on the outer side of the upper end of the positioning shaft 5. The inner wall of the stabilizing sleeve 9 has a movable groove that mates with the structure of the damping ring 10. When the height of the positioning shaft 5 needs to be adjusted, the positioning shaft 5 moves up and down within the positioning sleeve 4, and the damping ring 10 slides along the movable groove on the inner wall of the stabilizing sleeve 9. The friction between the damping ring 10 and the movable groove provides stable support for the positioning shaft 5 at any height position, preventing the positioning shaft from shaking or shifting during high-voltage testing. During testing, the positioning shaft 5 may loosen or shift due to external forces. This not only ensures more precise and stable height adjustment of the positioning shaft 5 but also enhances the structural strength of the entire auxiliary device. The front end of the multi-point bracket 3 and the corresponding position on the front side of the positioning sleeve 4 are each provided with a notch. Furthermore, the outer wall of the front end of the positioning sleeve 4 is connected to a locking bolt via a threaded structure. When adjusting the height of the positioning shaft 5, first loosen the locking bolt on the positioning sleeve 4. At this point, the positioning shaft 5 can move freely up and down within the positioning sleeve 4. After adjusting to the desired height, tighten the locking bolt on the positioning sleeve 4 to ensure the stability of the positioning shaft 5 in the set position. This prevents displacement of the positioning shaft 5 due to vibration or other external forces during high-voltage testing, thus improving the convenience and accuracy of the height adjustment of the positioning shaft 5.

[0019] Working Principle: When using this auxiliary device for power frequency AC withstand voltage testing of wires and cables, firstly, fix the entire device to a suitable position on the test bench through the mounting holes on the base 1. Then, according to the height requirements of the wires and cables, pre-adjust the overall height of the multi-point support 3 through the two columns 2. Then, place the wires and cables sequentially under the multi-point support 3 and pass between each set of fasteners 7. At this time, each positioning shaft 5 can vertically insert and move within the positioning sleeve 4 according to the specific position of the wires and cables, and be fixed to adjust the height of the corresponding set of fasteners 7 individually. When the positioning shaft 5 moves up and down within the positioning sleeve 4... The damping ring 10 slides along the movable groove on the inner wall of the stabilizing sleeve 9. After adjusting to the required height, the clamping bolt on the positioning sleeve 4 is tightened to ensure the stability of the positioning shaft 5 in the set position. Then, the relative position of each set of fasteners 7 is adjusted by rotating the adjusting nut 13 so that the fasteners 7 can fit tightly against the wire and cable. At the same time, the auxiliary clamp 8 is twisted under the action of the spring plate 16, and the connecting shaft 15 rotates in the fixed sleeve 14 to cooperate until each set of auxiliary clamps 8 closes together and clamps the wire and cable fixed by the fasteners 7 on both sides for auxiliary support, thus completing the fixing of the wire and cable and completing a series of operations.

[0020] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An auxiliary device for power frequency AC withstand voltage testing of wires and cables, comprising a base (1), wherein columns (2) are provided on both sides of the top of the base (1), and a multi-point support (3) is installed between the tops of the columns (2), characterized in that: The multi-point bracket (3) has several positioning sleeves (4) evenly fitted inside. The positioning sleeves (4) have a positioning shaft (5) vertically inserted inside. The bottom end of the positioning shaft (5) is provided with a fixed block (6). The bottom of the fixed block (6) is symmetrically provided with fasteners (7). The top of each group of fasteners (7) is connected to the bottom of the fixed block (6) through a tension adjustment mechanism. The front and rear sides of each group of fasteners (7) are symmetrically provided with auxiliary clamps (8). The auxiliary clamps (8) are used to assist in clamping the wires and cables after the fasteners (7) are fixed.

2. The auxiliary device for power frequency AC withstand voltage testing of wires and cables according to claim 1, characterized in that: The tension adjustment mechanism includes a horizontal shaft (11), a tension spring (12), and an adjusting nut (13). The horizontal shaft (11) is horizontally fixed to the bottom of the fixed block (6) by a support block. The top part of the fastener (7) is movably sleeved on the outside of the horizontal shaft (11). The tension spring (12) is sleeved on the outside of the middle of the horizontal shaft (11). The adjusting nut (13) is sleeved on the outside of both ends of the horizontal shaft (11) by a threaded structure.

3. The auxiliary device for power frequency AC withstand voltage testing of wires and cables according to claim 1, characterized in that: The fastener (7) has a fixed sleeve (14) at its bottom, and a connecting shaft (15) is inserted inside the fixed sleeve (14), and the auxiliary clamps (8) are fixed at the top of both ends of the connecting shaft (15).

4. The auxiliary device for power frequency AC withstand voltage testing of wires and cables according to claim 3, characterized in that: The connecting shaft (15) is connected to both the front and rear ends of the same group by spring plates (16), and the spring plates (16) are in a "V" shape.

5. An auxiliary device for power frequency AC withstand voltage testing of wires and cables according to claim 1, characterized in that: The top of the connection between the multi-point bracket (3) and the positioning sleeve (4) is provided with a stabilizing sleeve (9), and the upper end of the positioning shaft (5) is provided with a damping ring (10), and the inner wall of the stabilizing sleeve (9) is provided with an active groove that cooperates with the structure of the damping ring (10).

6. The auxiliary device for power frequency AC withstand voltage testing of wires and cables according to claim 1, characterized in that: The front end of the multi-point bracket (3) and the front side of the positioning sleeve (4) are provided with notches, and the outer wall of the front end of the positioning sleeve (4) is connected with a tightening bolt by a threaded structure.

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