Cable characteristic testing device

Abstract

A cable characteristic testing device comprises a testing seat, the testing seat comprises a base, a first rotating support, a second rotating support and a third rotating support, one end of the first rotating support is pivoted to the base, the other end of the first rotating support is pivoted to one end of the second rotating support, and the other end of the second rotating support is pivoted to one end of the third rotating support. A first angle indicating part, a second angle indicating part and a third angle indicating part are respectively arranged at the pivoting ends of the first rotating bracket, the second rotating bracket and the third rotating bracket; movable cable brackets are arranged on the first rotating bracket, the second rotating bracket and the third rotating bracket and are used for storing and fixing a to-be-tested cable; the device further comprises a sensor assembly and a circuit assembly electrically connected with the to-be-tested cable. According to the invention, variable-angle cable sample testing can be realized, and the discharge angle between cable electrodes can be adjusted, so that the influence of electric arcs generated at different discharge angles on the cable can be researched.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and particularly to a cable characteristic testing device. Background Art

[0002] With the large-scale development of electrical circuits and electrical equipment, cables have been widely used. The outer skin of cables is mostly made of materials such as polyvinyl chloride, polyethylene, and polypropylene. When the cable is heated, the outer skin of the cable will soften and release pyrolysis particles, and even directly catch fire. With the development of cable manufacturing technology, flame retardant materials are added to the outer skin of cables, so that after the test fire source is removed, the spread of the flame is within a limited range, and the remaining flame can go out by itself within a limited time.

[0003] When there are situations such as loose connections, broken wires, and grounding faults in the cable line, fault arcs are likely to be generated between the cable gaps. The arc has the properties of high heat and high temperature, and it will still cause damage to the outer skin of the cable and trigger fires. Therefore, it is necessary to study and test the characteristics of the cable under the influence of the arc. When the arc is generated, due to the extremely high temperature of the arc itself, the density decreases and it arches slightly upward under the action of convection. When the cable is used as a discharge electrode, different discharge angles will generate arcs of different shapes, and the harm caused to the cable will also vary. Currently, there is a lack of such cable characteristic testing devices. Summary of the Invention

[0004] Aiming at the deficiencies in the background art, the purpose of the present invention is to provide a cable characteristic testing device.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A cable characteristic testing device includes a test seat. The test seat includes a base, a first rotating bracket, a second rotating bracket, and a third rotating bracket. One end of the first rotating bracket is pivotally connected to the base, the other end of the first rotating bracket is pivotally connected to one end of the second rotating bracket, the other end of the second rotating bracket is pivotally connected to one end of the third rotating bracket. First angle indicating parts, second angle indicating parts, and third angle indicating parts are respectively provided at the pivotal connection ends of the first rotating bracket, the second rotating bracket, and the third rotating bracket; Movable cable brackets are provided on the first rotating bracket, the second rotating bracket, and the third rotating bracket for storing and fixing the cable to be tested; It also includes a sensor assembly and a circuit assembly electrically connected to the cable to be tested.

[0007] Further, the cable bracket is provided with a sliding groove, and each sliding groove is slidably adapted to the first rotating bracket, the second rotating bracket, and the third rotating bracket. A first locking member is further included for fixing each cable bracket to the corresponding rotating bracket.

[0008] Furthermore, the cable bracket is provided with a through hole for the cable to be tested to pass through, and further includes a second locking member for locking the cable to be tested in the through hole.

[0009] Furthermore, each of the angle indicating portions includes an angle disc and an indicating line. When a certain rotating bracket is rotated, the corresponding indicating line rotates accordingly, and the angle disc remains stationary.

[0010] Furthermore, the first angle disc and the second angle disc are arranged coplanarly and perpendicular to the base, and the third angle disc is parallel to the base.

[0011] Furthermore, the bottom of the base is provided with an anti-slip pad.

[0012] Furthermore, it further includes a box body provided with a receiving cavity, and the test seat and the sensor group are arranged in the receiving cavity.

[0013] Furthermore, the sensor assembly includes one or more of a temperature sensor, a sound sensor, a light sensor, a pressure sensor, a gas sensor, and a smoke sensor.

[0014] Furthermore, a photographing device is further installed in the receiving cavity, and the lens of the photographing device is aligned with the cable to be tested.

[0015] Furthermore, the circuit assembly at least includes a power supply, a load, a voltmeter, and an ammeter.

[0016] The beneficial effects of the present invention are as follows:

[0017] A cable characteristic testing device proposed by the present invention includes a test seat, and the test seat includes a base, a first rotating bracket, a second rotating bracket, and a third rotating bracket. One end of the first rotating bracket is pivotally connected to the base, the other end of the first rotating bracket is pivotally connected to one end of the second rotating bracket, the other end of the second rotating bracket is pivotally connected to one end of the third rotating bracket, and the pivotal connection ends of the first rotating bracket, the second rotating bracket, and the third rotating bracket are respectively provided with a first angle indicating portion, a second angle indicating portion, and a third angle indicating portion; movable cable brackets are provided on the first rotating bracket, the second rotating bracket, and the third rotating bracket for storing and fixing the cable to be tested; it further includes a sensor assembly and a circuit assembly electrically connected to the cable to be tested. The present invention can realize variable-angle cable sample testing, and can adjust the discharge angle between the cable electrodes to study the influence of the arcs generated at different discharge angles on the cable. Description of the Drawings

[0018] To more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the following will briefly introduce the attached drawings required for the description of the embodiments or the prior art. Obviously, the attached drawings in the following description are only some embodiments of the invention. For those of ordinary skill in the art, without creative efforts, other attached drawings can be obtained based on these attached drawings.

[0019] Figure 1 Schematic diagram of the test socket;

[0020] Figure 2 Schematic diagram of the whole;

[0021] Figure 3 One of the schematic diagrams of the first-angle disc;

[0022] Figure 4 Another schematic diagram of the first-angle disc;

[0023] Figure 5 One of the schematic diagrams of the second-angle disc;

[0024] Figure 6 Another schematic diagram of the second-angle disc;

[0025] Figure 7 One of the schematic diagrams of the third-angle disc;

[0026] Figure 8 Another schematic diagram of the third-angle disc;

[0027] In the figure, 1, base; 2, first shaft body; 3, first rotating bracket; 4, first cable bracket; 5, first cable to be tested; 6, first fixing screw; 7, first U-shaped clamp; 8, first positioning screw; 9, second shaft body; 10, second rotating bracket; 11, second cable bracket; 12, second cable to be tested; 13, second fixing screw; 14, second U-shaped clamp; 15, second positioning screw; 16, third shaft body; 17, third rotating bracket; 18, third cable bracket; 19, third cable to be tested; 20, third fixing screw; 21, third U-shaped clamp; 22, third positioning screw; 23, electrode of the cable to be tested; 24, wire; 25, power supply and load; 26, arc; 27, box body; 28, voltmeter; 29, ammeter; 30, sensor group; 31, camera; 32, first-angle disc; 33, first indicating line; 34, second-angle disc; 35, second indicating line; 36, third-angle disc; 37, third indicating line. Detailed implementation manners

[0028] The following will Figure 1-8 describe the present invention in detail.

[0029] A cable characteristic testing device includes a testing base, and the testing base includes a base 1, a first rotating bracket 3, a second rotating bracket 10, and a third rotating bracket 17. One end of the first rotating bracket 3 is pivotally connected to the base 1, the other end of the first rotating bracket 3 is pivotally connected to one end of the second rotating bracket 10, the other end of the second rotating bracket 10 is pivotally connected to one end of the third rotating bracket 17, and the pivotal ends of the first rotating bracket 3, the second rotating bracket 10, and the third rotating bracket 17 are respectively provided with a first angle indicating portion, a second angle indicating portion, and a third angle indicating portion; movable cable brackets are provided on the first rotating bracket 3, the second rotating bracket 10, and the third rotating bracket 17 for storing and fixing the cable to be tested; it also includes a sensor group of 30 pieces and a circuit component electrically connected to the cable to be tested.

[0030] In this embodiment, the cable bracket is provided with a sliding groove, and each sliding groove is slidably adapted to the first rotating bracket 3, the second rotating bracket 10, and the third rotating bracket 17. It also includes a first locking member for fixing each cable bracket to the corresponding rotating bracket. Specifically, the first locking member is a combination of a U-shaped clamp and a positioning screw, or the first locking member is directly a screw that passes through the cable bracket and is threadedly connected to the rotating bracket.

[0031] In this embodiment, the cable bracket is provided with a through hole for the cable to be tested to pass through, and it also includes a second locking member for locking the cable to be tested in the through hole.

[0032] In this embodiment, each angle indicating portion includes an angle disc and an indicating line. When a certain rotating bracket rotates, the corresponding indicating line rotates accordingly, and the angle disc remains stationary.

[0033] In this embodiment, the first angle disc 32 and the second angle disc 34 are arranged coplanarly and perpendicular to the base 1, and the third angle disc 36 is parallel to the base 1.

[0034] Specifically, a first shaft body 2 is fixedly provided at one end of the base 1, one end of the first rotating bracket 3 is pivotally connected to the first shaft body 2, the first shaft body 2 and the base 1 are fixed and immovable, the first rotating bracket 3 can rotate around the first shaft body 2 in the xOz plane, and the included angle between the first rotating bracket 3 and the xOy plane after counterclockwise rotation is θ 1 (θ 1 is the included angle between the first rotating bracket 3 and the base 1). A first angle disc 32 is provided on the side surface of the first shaft body 2, and the degrees from 0 to 360° are marked counterclockwise on the first angle disc 32. The 0-degree scale line is located on the rightmost side of the first angle disc 32, that is, parallel to the horizontal plane. A first indicating line 33 is provided on the side surface of one end of the first rotating bracket 3. When the first rotating bracket 3 rotates, the first indicating line 33 rotates accordingly, the first angle disc 32 remains stationary, and the value of the scale line on the first angle disc 32 pointed to by the first indicating line 33 is θ 1The size. For example, when the first rotating bracket 3 parallel to the base 1 rotates counterclockwise by 45°, the first indicating line 33 points to the 45° scale line in the first angle disc 32, and θ 1 is +45°. Figure 3 is θ 1 is a schematic diagram when θ is 0. Figure 4 is θ 1 is a schematic diagram when θ is not 0.

[0035] The first cable bracket 4 can move on the first rotating bracket 3. The through hole at its upper end allows the first cable to be tested 5 to pass through, and the cable is fixed by the first fixing screw 6. When the first cable bracket 4 moves to a specified position on the first rotating bracket 3, the first U-shaped clamp 7 fixes the first cable bracket 4 on the first rotating bracket 3 through the first positioning screw 8. The unit vectors on the x-axis, y-axis, and z-axis are denoted as i, j, and k respectively. The direction on the cable placed on the first cable bracket 4 is the unit vector direction (cosθ 1 i, 0, sinθ 1 k).

[0036] One end of the second rotating bracket 10 is fixedly provided with a second shaft body 9. One end of the second rotating bracket 10 is pivotally connected to the other end of the first rotating bracket 3 through the second shaft body 9. A second indicating line 35 is provided on the side surface of the second shaft body 9, and a second angle disc 34 is provided on the side surface of the other end of the first rotating bracket 3. The degrees from 0 to 360° are marked clockwise on the second angle disc 34. The second rotating bracket 10 can drive the second shaft body 9 to rotate in the xOz plane. The angle of clockwise rotation of the second rotating bracket 10 is θ 2 (θ 2 is the included angle between the second rotating bracket 10 and the first rotating bracket 3). When the second rotating bracket 10 rotates, the second indicating line 35 rotates accordingly, and the second angle disc 34 remains stationary. When it rotates to the position where the first rotating bracket 3 and the second rotating bracket 10 are in a straight line, that is, the axes coincide, the second indicating line 35 points to the 0 scale line of the second angle disc 34. When it rotates to a non-straight-line position, the value of the scale line on the second angle disc 34 pointed by the second indicating line 35 is the size of θ 2 (θ 2 is not 0). Figure 5 is θ 2 is a schematic diagram when θ is 0. Figure 6 is θ 2 is a schematic diagram when θ is not 0.

[0037] The second cable support 11 can move on the second rotating support 10. The upper end of the second cable support 11 is provided with an opening through which the second cable to be tested 12 can pass, and the cable is fixed by the second fixing screw 13. When the second cable support 11 moves to a specified position on the second rotating support 10, the second U-shaped clamp 14 fixes the second cable support 11 on the second rotating support 10 through the second positioning screw 15. The upward direction of the cable fixed in the hole of the second cable support 11 is the unit vector direction (cos(θ 1 -θ 2 )i, 0, sin(θ 1 -θ 2 )k).

[0038] The other end of the second rotating support 10 is fixedly provided with a third shaft body 16. One end of the third rotating support 17 is pivotally connected to the other end of the second rotating support 10 through the third shaft body 16. The top surface of the third shaft body 16 is provided with a third angle disc 36. The degrees from 0 to 360° are marked counterclockwise on the third angle disc 36, and the scale line of 0 degree is located on the rightmost side of the third angle disc 36, that is, it coincides with the axis of the second rotating support 10. The third rotating support 17 can rotate around the third shaft body 16, and the angle of counterclockwise rotation of the third rotating support 17 is θ 3 (θ 3 is the included angle between the third rotating support 17 and the second rotating support 10), and a third indicating line 37 is provided on the top surface of one end of the third rotating support 17. When the third rotating support 17 rotates, the third indicating line 37 rotates accordingly, and the third angle disc 36 remains stationary. The value of the scale line on the third angle disc 36 pointed by the third indicating line 37 is the magnitude of θ 3 . Figure 7 is a schematic diagram when θ 3 is 0, Figure 8 is a schematic diagram when θ 3 is not 0.

[0039] The third cable support 18 can move on the third rotating support 17. The upper end of the third cable support 18 is provided with an opening through which the third cable to be tested 19 can pass, and the cable is fixed by the third fixing screw 20. When the third cable support 18 moves to a specified position on the third rotating support 17, the third U-shaped clamp 21 fixes the third cable support 18 on the third rotating support 17 through the third positioning screw 22. The upward direction of the cable fixed in the hole of the third cable support 18 is the unit vector direction (cosθ 3 ·cos(θ 1 -θ 2 )i, sinθ 3 j, cosθ 3 ·sin(θ 1 -θ 2 )k).

[0040] In this embodiment, an anti-slip pad is provided at the bottom of the base 1.

[0041] In this embodiment, it further includes a box body 27 which is provided with a receiving cavity, and the test seat and the sensor group 30 are arranged in the receiving cavity.

[0042] In this embodiment, the sensor group 30 includes one or more of a temperature sensor, a sound sensor, a light sensor, a pressure sensor, a gas sensor, and a smoke sensor. Specifically, the temperature sensor measures the temperature in areas such as around the cable and the air around the electric arc 26, the sound sensor is used to measure the sound signal generated by the discharge of the electric arc 26, the light sensor is used to collect the light intensity of the bright discharge of the electric arc 26, the pressure sensor measures the change in the pressure of the enclosed space caused by the high-temperature electric arc 26, the gas sensor (including but not limited to gases such as HCl, CO, SO 2 etc.) collects the gases released by the cable after being heated by the electric arc 26, and the smoke sensor is used to collect the smoke particles generated after the thermal decomposition of the cable.

[0043] In this embodiment, a photographing device is further installed in the receiving cavity, and the lens of the photographing device is aligned with the cable to be tested.

[0044] In this embodiment, the circuit components at least include a power supply, a load, a voltmeter 28, and an ammeter 29.

[0045] The working principle of a cable characteristic testing device proposed by the present invention is as follows:

[0046] In order to test the influence of the discharge angle of the electric arc 26 between the electrodes of two cables on the cables, there are two ways to place the cables. One is to place them on the first cable support 4 and the second cable support 11, and the other is to place them on the second cable support 11 and the third cable support 18.

[0047] One end of two cables is sharpened to serve as the cable electrode 23 to be tested, and it is placed in the closed box body 27. The cable electrode 23 to be tested is connected to the power supply and the load 25 through a wire 24. The power supply can be selected as a DC power supply, an AC power supply, etc., and the load can be selected as a resistive load, an inductive load, a capacitive load, etc. according to requirements. The gap between the cable electrodes 23 to be tested is adjusted to an appropriate distance, and when powered on, an electric arc 26 can be generated between the gaps of the cable electrodes 23 to be tested. The voltmeter 28 is connected in parallel at both ends of the cable electrode 23 to be tested to measure the voltage of the electric arc 26, and the ammeter 29 is connected in series in the circuit to measure the current of the electric arc 26.

[0048] The sensor group 30 is placed in the closed box body 27, and appropriate sensors are selected for testing according to needs.

[0049] The camera 31 may be a high-speed camera 31, including but not limited to being used to capture the morphological changes of the arc 26 generated between the cable electrodes 23 to be tested, the deformation conditions, ignition conditions, flame morphology, etc. of the cable electrodes 23 to be tested due to heat.

[0050] The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose is to enable those skilled in the art to understand the content of the present invention and implement it, and it cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A cable characteristic testing device, characterized in that: The test seat comprises a test seat, which comprises a base, a first rotating bracket, a second rotating bracket and a third rotating bracket, one end of the first rotating bracket is pivoted to the base, the other end of the first rotating bracket is pivoted to one end of the second rotating bracket, the other end of the second rotating bracket is pivoted to one end of the third rotating bracket, and the pivoting ends of the first rotating bracket, the second rotating bracket and the third rotating bracket are respectively provided with a first angle indicating part, a second angle indicating part and a third angle indicating part; the first rotating bracket, the second rotating bracket and the third rotating bracket are provided with a movable cable bracket for storing and fixing a cable to be tested; and the test seat also comprises a sensor component and a circuit component electrically connected to the cable to be tested.

2. A cable characteristic testing device as claimed in claim 1, characterized in that: The cable bracket is provided with a sliding groove, each of which is slidably adapted to the first rotating bracket, the second rotating bracket and the third rotating bracket, and also includes a first locking member for fixing each of the cable brackets to the corresponding rotating bracket.

3. A cable characteristic testing device as claimed in claim 1 or 2, characterized in that: The cable support is provided with a through hole for the cable to be tested to pass through, and also includes a second locking member for locking the cable to be tested in the through hole.

4. A cable characteristic testing device as claimed in claim 1, characterized in that: Each of the angle indicating parts comprises an angle disc and an indicating line. When a certain rotating bracket is rotated, the corresponding indicating line rotates accordingly, and the angle disc is fixed.

5. A cable characteristic testing device as claimed in claim 4, characterized in that: The first angle disc and the second angle disc are coplanar and perpendicular to the base, and the third angle disc is parallel to the base.

6. A cable characteristic testing device as claimed in claim 1, characterized in that: The bottom of the base is provided with an anti-skid pad.

7. A cable characteristic testing device as claimed in claim 1, characterized in that: It also includes a box body, which is provided with a containing cavity, and the test seat and the sensor group are arranged in the containing cavity.

8. A cable characteristic testing device as claimed in claim 1 or 7, characterized in that: The sensor assembly includes one or more of a temperature sensor, a sound sensor, a light sensor, a pressure sensor, a gas sensor, and a smoke sensor.

9. A cable characteristic testing device as claimed in claim 7, characterized in that: A shooting device is also installed in the accommodating cavity, and the lens of the shooting device is aimed at the cable to be tested.

10. A cable characteristic testing device as claimed in claim 1, characterized in that: The circuit components at least include a power supply, a load, a voltmeter and an ammeter.

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