A wire and cable bend test device

Abstract

The utility model relates to test device technical field especially for a kind of electric wire and cable bending test device, including bottom plate 1, the first bending groove 2, second bending groove 3 and third bending groove 4 for placing electric wire and cable are respectively set on bottom plate 1, the angle of the bending of the first bending groove 2, second bending groove 3 and third bending groove 4 is respectively acute angle, right angle and obtuse angle.In use, by integrating multiple placement slots with different bending radii on bottom plate 1, simultaneous testing of multiple bending radii can be achieved at once, without the need to frequently replace the bending components and adjust the fixture spacing as in existing devices. This allows for simultaneous static testing of multiple radii, avoiding environmental variable interference caused by multiple tests, ensuring that the test data under different radii has direct comparability, and evaluating the tolerance of the cable in multiple scenarios. This is particularly suitable for batch detection scenarios of bending tests under different cable conditions.

Description

Technical Field

[0001] This utility model relates to the field of testing device technology, specifically a wire and cable bending testing device. Background Technology

[0002] Wires and cables are the core connecting components of electrical equipment. In actual installation and use, they often need to be laid in bends according to the internal space layout of the equipment, and are fixed at multiple points through structures such as cable ties, slots, and fixing brackets. After production, wires and cables need to be subjected to bending tests, which are divided into dynamic bending tests and static bending tests. When performing static bending tests on wires and cables, appropriate testing equipment is required.

[0003] Existing static testing devices mostly adopt a structure of "single bending column + adjustable clamp", which can only perform bending tests of one curvature. Since cables are in equipment such as distribution cabinets, the bending angles can be acute, right, and obtuse. If it is necessary to detect the performance difference of cables under different curvatures, the bending column needs to be frequently replaced and the clamp spacing adjusted. The operation process is cumbersome, and the test data under different curvatures is easily affected by changes in ambient temperature and humidity during multiple tests, resulting in a lack of consistency in the test data. Therefore, a wire and cable bending test device is needed to improve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a wire and cable bending test device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A wire and cable bending test device includes a base plate 1, on which a first bending groove 2, a second bending groove 3 and a third bending groove 4 are respectively provided for placing wires and cables. The bending angles of the first bending groove 2, the second bending groove 3 and the third bending groove 4 are acute angle, right angle and obtuse angle, respectively.

[0007] Preferably, the three bending grooves are arranged parallel to each other along the length of the base plate 1. The bending angle of the first bending groove 2 is set to 60° to simulate the cable bending in the compact space of the distribution cabinet. The bending angle of the second bending groove 3 is set to 90°, a standard right angle, which is suitable for the horizontal-vertical turning cable laying in most equipment. The bending angle of the third bending groove 4 is set to 120°, a common obtuse angle, which corresponds to the cable bending scenario with a loose layout in the equipment. The bending section length of the three bending grooves is 50mm to ensure the consistency of the cable bending area.

[0008] The top of the base plate 1 is provided with a first positioning mechanism 5 and a second positioning mechanism 6. The first positioning mechanism 5 includes a mounting bracket 50 fixed on the base plate 1. A screw 51 is threaded through the top of the mounting bracket 50. A connecting plate 52 is provided at the bottom of the screw 51. A positioning block 53 is fixed at the bottom of the connecting plate 52. The number of positioning blocks 53 is three.

[0009] As a preferred embodiment of this utility model, the mounting bracket 50 is shaped like an inverted "U". A screw hole 500 is provided through the middle of the top of the mounting bracket 50, and the screw hole 500 is threadedly engaged with the screw rod 51.

[0010] Through the above technical solution, the screw hole 500 and the screw rod 51 are threaded together to ensure that the screw rod 51 only moves up and down in the vertical direction, avoiding the displacement of the screw rod 51 and causing the positioning block 53 to press the cable off-center, thus improving the positioning stability.

[0011] As a preferred embodiment of this utility model, both ends of the top of the mounting bracket 50 are provided with guide holes 501, and guide rods 54 are fitted into the guide holes 501 with clearance. The guide rods 54 are "T"-shaped rods, and the bottom end of the guide rods 54 is fixed to the top of the connecting plate 52.

[0012] Through the above technical solution, the clearance fit between the guide rod 54 and the guide hole 501 can limit the movement direction of the connecting plate 52, prevent the connecting plate 52 from being horizontally deflected when the screw 51 rotates, avoid the three positioning blocks 53 from not being able to align the three bending grooves synchronously, ensure that the positioning blocks 53 are pressed down vertically, and prevent the "T"-shaped guide rod 54 from coming out of the guide hole 501, avoid component loss or test interruption, and simplify the assembly process of the guide structure.

[0013] As a preferred embodiment of this utility model, the bottom of the positioning block 53 is provided with a positioning groove 530, which is semi-circular, and a rubber pad is provided on the outer wall of the positioning block 53, which has anti-slip texture.

[0014] Through the above technical solution, the semi-circular positioning groove 530 can fit with the outer circle of the cable, avoiding excessive local pressure that could damage the cable insulation layer. The rubber pad, preferably nitrile rubber, is elastic and can be adapted to cables of different diameters. At the same time, the anti-slip texture further increases the friction, preventing the cable from shifting due to its own elastic rebound during static testing.

[0015] As a preferred embodiment of this utility model, the openings at both ends of the first bending groove 2, the second bending groove 3 and the third bending groove 4 are all provided with arc-shaped chamfers, and the inner walls of the first bending groove 2, the second bending groove 3 and the third bending groove 4 are all provided with anti-slip textures.

[0016] Through the above technical solutions, the arc chamfer can eliminate the sharp edge of the slot and prevent the insulation layer from being scratched when the cable is clamped. The anti-slip texture on the inner wall of the slot can increase the static friction between the cable and the slot wall, effectively preventing the cable from sliding due to slight vibration or gravity during the 72-hour static test, and ensuring that the bending angle always meets the preset requirements.

[0017] As a preferred embodiment of this utility model, a rotating handle is fixed to the top of the screw 51.

[0018] Through the above technical solution, the circular rotating handle increases the force application area for the operator, making it easy to complete positioning and adjustment. The surface of the handle has anti-slip protrusions to prevent the hand from slipping during rotation, thus improving operational safety.

[0019] As a preferred embodiment of this utility model, the first positioning mechanism 5 and the second positioning mechanism 6 have the same structure, and the first positioning mechanism 5 and the second positioning mechanism 6 are distributed perpendicularly to each other on the base plate 1.

[0020] Through the above technical solution, the setting angle of the three positioning blocks on the second positioning mechanism 6 is adapted to the bending sections of the first bending groove 2, the second bending groove 3 and the third bending groove 4, ensuring that they can be lowered and extended into the bending section to limit the movement of the wires and cables.

[0021] As a preferred embodiment of this utility model, the first bending groove 2, the second bending groove 3 and the third bending groove 4 are all composed of a horizontal section and a bending section parallel to the base plate 1.

[0022] The above technical solution ensures that the two ends of the cable are placed straight, avoiding uneven stress on the bending section caused by the cable being skewed at both ends.

[0023] Compared with the prior art, the beneficial effects of this utility model are:

[0024] 1. When in use, this utility model integrates multiple placement slots with different bending curvatures on the base plate 1, which can realize the simultaneous testing of multiple bending curvatures at one time. Unlike existing devices, it does not require frequent replacement of bending components and adjustment of clamp spacing. It can simultaneously complete static tests of multiple curvatures, avoid environmental variable interference caused by multiple tests, ensure that the test data under different curvatures are directly comparable, and evaluate the cable's endurance under multiple scenarios. It is especially suitable for batch testing scenarios of cable bending tests under different conditions.

[0025] 2. Through the structural design of the first positioning mechanism 5 and the second positioning mechanism 6, this utility model can simultaneously complete the synchronous positioning of multiple wires and cables during use, ensuring the stability of the wires and cables during comparative bending tests and ensuring the effectiveness of the bending tests. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0027] Figure 2 This is a schematic diagram of the base plate structure of this utility model;

[0028] Figure 3 This is a schematic diagram of the assembly structure of the first positioning mechanism of this utility model;

[0029] Figure 4 This is a schematic diagram of the second positioning mechanism of this utility model.

[0030] In the diagram: 1. Base plate; 2. First bending groove; 3. Second bending groove; 4. Third bending groove; 5. First positioning mechanism; 50. Mounting bracket; 500. Screw hole; 501. Guide hole; 51. Screw; 52. Connecting plate; 53. Positioning block; 530. Positioning groove; 54. Guide rod; 6. Second positioning mechanism. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0032] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, and several embodiments of the utility model will be provided. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and complete.

[0033] For examples, please refer to Figure 1-4 This utility model provides a technical solution:

[0034] A wire and cable bending test device includes a base plate 1, on which a first bending groove 2, a second bending groove 3 and a third bending groove 4 are respectively provided for placing wires and cables. The bending angles of the first bending groove 2, the second bending groove 3 and the third bending groove 4 are acute angle, right angle and obtuse angle, respectively.

[0035] Preferably, the three bending grooves are arranged parallel to each other along the length of the base plate 1. The bending angle of the first bending groove 2 is set to 60° to simulate the cable bending in the compact space of the distribution cabinet. The bending angle of the second bending groove 3 is set to 90°, a standard right angle, which is suitable for the horizontal-vertical turning cable laying in most equipment. The bending angle of the third bending groove 4 is set to 120°, a common obtuse angle, which corresponds to the cable bending scenario with a loose layout in the equipment. The bending section length of the three bending grooves is 50mm to ensure the consistency of the cable bending area.

[0036] The top of the base plate 1 is provided with a first positioning mechanism 5 and a second positioning mechanism 6. The first positioning mechanism 5 includes a mounting bracket 50 fixed on the base plate 1. A screw 51 is threaded through the top of the mounting bracket 50. The bottom of the screw 51 is rotatably connected to a connecting plate 52 through a bearing. A positioning block 53 is fixed to the bottom of the connecting plate 52. There are three positioning blocks 53.

[0037] In this embodiment, the mounting bracket 50 is shaped like an inverted "U". A screw hole 500 is provided through the middle of the top of the mounting bracket 50, and the screw hole 500 is threadedly engaged with the screw rod 51.

[0038] The opening width of the inverted U-shaped mounting bracket 50 can span three parallel bending slots.

[0039] Through the above technical solution, the screw hole 500 and the screw rod 51 are threaded together to ensure that the screw rod 51 only moves up and down in the vertical direction, avoiding the displacement of the screw rod 51 and causing the positioning block 53 to press the cable off-center, thus improving the positioning stability.

[0040] In this embodiment, guide holes 501 are provided at both ends of the top of the mounting bracket 50. Guide rods 54 are fitted into the guide holes 501 with clearance. The guide rods 54 are "T" shaped rods, and the bottom end of the guide rods 54 is fixed to the top of the connecting plate 52.

[0041] Through the above technical solution, the clearance fit between the guide rod 54 and the guide hole 501 can limit the movement direction of the connecting plate 52, prevent the connecting plate 52 from being horizontally deflected when the screw 51 rotates, avoid the three positioning blocks 53 from not being able to align the three bending grooves synchronously, ensure that the positioning blocks 53 are pressed down vertically, and prevent the "T"-shaped guide rod 54 from coming out of the guide hole 501, avoid component loss or test interruption, and simplify the assembly process of the guide structure.

[0042] In this embodiment, a positioning groove 530 is provided at the bottom of the positioning block 53. The positioning groove 530 is semi-circular, and a rubber pad is provided on the outer wall of the positioning block 53. The rubber pad has anti-slip texture.

[0043] Through the above technical solution, the semi-circular positioning groove 530 can fit with the outer circle of the cable, avoiding excessive local pressure that could damage the cable insulation layer. The rubber pad, preferably nitrile rubber, is elastic and can be adapted to cables of different diameters. At the same time, the anti-slip texture further increases the friction, preventing the cable from shifting due to its own elastic rebound during static testing.

[0044] In this embodiment, the openings at both ends of the first bending groove 2, the second bending groove 3, and the third bending groove 4 are all chamfered, and the inner walls of the first bending groove 2, the second bending groove 3, and the third bending groove 4 are all provided with anti-slip textures.

[0045] Through the above technical solutions, the arc chamfer can eliminate the sharp edge of the slot and prevent the insulation layer from being scratched when the cable is clamped. The anti-slip texture on the inner wall of the slot can increase the static friction between the cable and the slot wall, effectively preventing the cable from sliding due to slight vibration or gravity during the 72-hour static test, and ensuring that the bending angle always meets the preset requirements.

[0046] In this embodiment, a rotating handle is fixed to the top of the screw 51.

[0047] Through the above technical solution, the circular rotating handle increases the force application area for the operator, making it easy to complete positioning and adjustment. The surface of the handle has anti-slip protrusions to prevent the hand from slipping during rotation, thus improving operational safety.

[0048] In this embodiment, the first positioning mechanism 5 and the second positioning mechanism 6 have the same structure and are perpendicularly distributed on the base plate 1.

[0049] Through the above technical solution, the setting angle of the three positioning blocks on the second positioning mechanism 6 is adapted to the bending sections of the first bending groove 2, the second bending groove 3 and the third bending groove 4, ensuring that they can be lowered and extended into the bending section to limit the movement of the wires and cables.

[0050] In this embodiment, the first bending groove 2, the second bending groove 3, and the third bending groove 4 are all composed of a horizontal section and a bending section parallel to the base plate 1.

[0051] The above technical solution ensures that the two ends of the cable are placed straight, avoiding uneven stress on the bending section caused by the cable being skewed at both ends.

[0052] The working process of this utility model is as follows: When the wire and cable bending test device designed in this scheme is working or running, a cable sample is cut, ensuring that sufficient fixed length is reserved at both ends, and the cable is placed into the selected bending groove: the middle part of the cable fits into the bending section of the bending groove, ensuring that the bending angle is consistent with the groove, and both ends naturally extend to the horizontal section of the bending groove. If multiple angles need to be tested at the same time, three different samples can be placed into three bending grooves respectively to achieve synchronous testing.

[0053] Rotate the handle of the first positioning mechanism 5 to drive the screw 51 to descend vertically along the screw hole 500 of the mounting bracket 50. At this time, the connecting plate 52 moves vertically along the guide hole 501 under the constraint of the guide rod 54, and simultaneously drives the three positioning blocks 53 to press down. When the positioning groove 530 of the positioning block 53 is in contact with the cable surface, continue to rotate the handle to ensure that the rubber pad is in full contact with the cable and generates sufficient friction to fix the cable and prevent the cable from sliding along the length of the groove. Similarly, rotate the handle of the second positioning mechanism 6 to confine the cable in the bending groove. Place the device with the cable clamped in a standard test environment with a temperature of 23±2℃ and a relative humidity of 50±5% and let it stand for the specified time according to the test standard (such as GB / T 2951.31-2008).

[0054] All standard parts used in this application can be purchased from the market. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art and are also general components, which are common knowledge in this field.

[0055] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art 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 appended claims and their equivalents.

Claims

1. A device for testing the bending of electrical wires and cables, characterized in that, include: The base plate (1) is provided with a first bending groove (2), a second bending groove (3) and a third bending groove (4) for placing wires and cables. The bending angles of the first bending groove (2), the second bending groove (3) and the third bending groove (4) are acute, right and obtuse, respectively. The top of the base plate (1) is provided with a first positioning mechanism (5) and a second positioning mechanism (6). The first positioning mechanism (5) includes a mounting bracket (50) fixed on the base plate (1). A screw (51) is threaded through the top of the mounting bracket (50). A connecting plate (52) is provided at the bottom of the screw (51). A positioning block (53) is fixed at the bottom of the connecting plate (52). The number of positioning blocks (53) is three.

2. The wire and cable bending test device according to claim 1, characterized in that: The mounting bracket (50) is shaped like an inverted "U". A screw hole (500) is provided through the middle of the top of the mounting bracket (50), and the screw hole (500) is threadedly engaged with the screw rod (51).

3. The wire and cable bending test device according to claim 2, characterized in that: The mounting bracket (50) has guide holes (501) through both ends of its top. A guide rod (54) is fitted into the guide hole (501) with clearance. The guide rod (54) is a "T" shaped rod. The bottom end of the guide rod (54) is fixed to the top of the connecting plate (52).

4. The wire and cable bending test device according to claim 1, characterized in that: The bottom of the positioning block (53) is provided with a positioning groove (530), and a rubber pad is provided on the outer wall of the positioning block (53), and the rubber pad has anti-slip texture.

5. The wire and cable bending test device according to claim 1, characterized in that: The openings at both ends of the first bending groove (2), the second bending groove (3) and the third bending groove (4) are all chamfered, and the inner walls of the first bending groove (2), the second bending groove (3) and the third bending groove (4) are all provided with anti-slip texture.

6. The wire and cable bending test device according to claim 1, characterized in that: A rotating handle is fixed to the top of the screw (51).

7. The wire and cable bending test device according to claim 1, characterized in that: The first positioning mechanism (5) and the second positioning mechanism (6) have the same structure and are perpendicular to each other on the base plate (1).

8. The wire and cable bending test device according to claim 3, characterized in that: The first bending groove (2), the second bending groove (3) and the third bending groove (4) are all composed of a horizontal section and a bending section parallel to the bottom plate (1).

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