Cable mechanical shock resistance testing machine

Abstract

The utility model discloses a mechanical shock resistance testing machine for a cable, which comprises a servo motor speed reducer module, a steel wire rope, a linear guide rail, an electric magnet, a counterweight mounting plate sliding table, a counterweight block, a tested cable placement sliding block, a laser displacement sensor, an electric cylinder, a tested cable sample and a withstand voltage tester, the device can be matched with impact hammers of various weights and various free falling body heights, and meets different requirements for mechanical impact resistance in the cable research and development process, so that reliable data is better provided for cable design and manufacturing. According to the utility model, the structure is simple, the cable is in a static state in the use process, the single cable can be tested for multiple times through program setting, and the mechanical shock resistance parameter data of different positions, different heights and different counterweights can be repeatedly tested for multiple times for each cable, so that the contingency existing in the single test is eliminated.

Description

Technical Field

[0001] The utility model is applied to the wire and cable industry, especially in the field of mining cables, and specifically relates to a wire and cable anti-mechanical impact testing machine for testing the anti-mechanical impact performance of wires and cables. Background Art

[0002] During the process of mine exploitation, the main power cables connected to mining equipment are extremely vulnerable to damage. One of the most common damage methods is that the cables are impacted by ore, resulting in insulation cracking, and then the insulation is broken down by high voltage. Once the cable is broken down, replacing the cable will bring great economic losses to users. Therefore, it is crucial to improve the anti-impact performance of cables.

[0003] The MT 818 "Coal Mine Cables" standard stipulates that cables need to undergo anti-mechanical impact tests. It is required that when a 20-kg impact hammer freely falls from a height of 1.5 meters onto the cable, the cable insulation shall not be broken down. Existing anti-mechanical impact testing machines can often only perform tests with a 20-kg impact hammer at a height of 1.5 meters. When higher impact energy is required, there are no corresponding parameters, which greatly limits the R & D work on the anti-impact performance of cables. Summary of the Utility Model

[0004] Purpose of the utility model: To solve the deficiencies of the existing technology, the utility model provides a wire and cable anti-mechanical impact testing machine, which can match impact hammers of various weights and various free-fall heights, meet the requirements of different anti-mechanical impact properties during the cable R & D process, and thus better provide reliable data for cable design and manufacturing.

[0005] Technical solution: A wire and cable anti-mechanical impact testing machine includes a servo motor reducer module, a steel wire rope, a linear guide rail, an electro-magnet, a counterweight mounting plate slide, counterweights, a tested wire and cable placement slide, a laser displacement sensor, an electric cylinder, a tested wire and cable sample, and a withstand voltage tester;

[0006] The linear guide rail is equipped with a counterweight mounting plate slide that can move up and down. The counterweights are installed at the bottom of the counterweight mounting plate slide, and the electro-magnet is installed at the top of the counterweight mounting plate slide;

[0007] The top end of the linear guide rail is fixedly installed with a servo motor reducer module, a steel wire rope, and a laser displacement sensor. The stretching of the steel wire rope is controlled by the servo motor reducer module. The steel wire rope is connected to the electro-magnet, and the electro-magnet is energized to adsorb the counterweight mounting plate slide;

[0008] A placed slider for the cable under test is fixedly installed at the bottom of the linear guide rail. Electric cylinders are installed on both the left and right sides of the placed slider for the cable under test. A chute is provided in the middle of the placed slider for the cable under test, and the cable sample under test is placed in the chute. By controlling the electric cylinders to move the placed slider for the cable under test, the cable sample under test is automatically positioned directly below the counterweight block.

[0009] Disconnect the power supply of the electro - magnet, and the slide of the counterweight mounting plate can freely accelerate and fall, and finally act on the surface of the cable sample under test.

[0010] The positive electrode of the electrode of the withstand voltage tester is connected to the power line conductor of the cable sample under test, and the negative electrode is connected to the ground wire conductor of the cable sample under test, which is used to measure the pressure borne by the cable sample under test.

[0011] As an optimization: The laser displacement sensor is used to control the up - and - down movement of the slide of the counterweight mounting plate to a specified height position.

[0012] As an optimization: The counterweight of the counterweight block can reach 100 kg.

[0013] Beneficial effects: The structure of the utility model is simple. The cable is in a static state during use. A single cable can be tested multiple times through program setting. Each cable can repeatedly test the anti - mechanical shock performance parameter data at different positions, different heights, and different counterweights, thus eliminating the contingency of a single test. Description of the Drawings

[0014] Figure 1 is the overall structure schematic diagram of the utility model;

[0015] Figure 2 is the front - view structure schematic diagram of the utility model;

[0016] Figure 3 is the side - view structure schematic diagram of the utility model. Detailed Implementation Modes

[0017] Embodiment

[0018] As Figures 1-3 shown, a cable anti - mechanical shock testing machine includes a servo - motor reducer module 1, a steel wire rope 2, a linear guide rail 3, an electro - magnet 4, a counterweight mounting plate slide 5, a counterweight block 6, a placed slider for the cable under test 7, a laser displacement sensor 8, an electric cylinder 9, a cable sample under test 10, and a withstand voltage tester 11.

[0019] The linear guide rail 3 is installed with a counterweight mounting plate slide 5 that can move up and down. The counterweight block 6 is installed at the bottom of the counterweight mounting plate slide 5, and the electro - magnet 4 is installed at the top of the counterweight mounting plate slide 5.

[0020] A servo motor reducer module 1, a steel wire rope 2 and a laser displacement sensor 8 are fixedly installed on the top of the linear guide rail 3. The stretching of the steel wire rope 2 is controlled by the servo motor reducer module 1. The steel wire rope 2 is connected to an electric magnet 4, and the electric magnet 4 is energized to adsorb the counterweight mounting plate slide 5.

[0021] A tested cable placement slider 7 is fixedly installed at the bottom end of the linear guide rail 3, and electric cylinders 9 are installed on the left and right sides of the tested cable placement slider 7. A slide groove is provided in the middle of the tested cable placement slider 7, and the tested cable sample 10 is placed in the slide groove. The tested cable placement slider 7 is moved by controlling the electric cylinder 9 to automatically position the tested cable sample 10 to be directly below the counterweight block 6.

[0022] The test process of the utility model is as follows: according to the test conditions, the required counterweight block 6 is installed on the counterweight mounting plate slide 5, and the counterweight can reach 100kg, which is equivalent to the weight of the gangue in the actual mining process. Through the servo motor reducer module 1, the electric magnet 4 is connected by the wire rope 2, and the electric magnet 4 is energized to adsorb the counterweight mounting plate slide 5. At the same time, a laser displacement sensor 8 is installed at the highest height above the counterweight mounting plate slide 5. Through program setting, it can move up and down to a specified height position. The height is determined by the length of the linear guide 3. Among them, the recommended height is 6 meters, which is equivalent to the actual mining working surface height.

[0023] There is a movable cable under test placement slider 7 directly below the counterweight block 6, and the cable under test sample 10 is fixedly placed on the cable under test placement slider 7. Electric cylinders 9 are installed on the left and right sides of the cable under test placement slider 7. By controlling the stroke of the electric cylinder 9, the cable under test placement slider 7 can be moved to any position in the slide groove. When the counterweight mounting plate slide 5 moves to the specified height position, the power of the electric magnet 4 is disconnected, and the counterweight mounting plate slide 5 falls freely and accelerates, and finally acts on the surface of the cable under test sample 10, then the mechanical impact resistance test process of the cable is completed. At this time, connect the positive electrode of the voltage withstand tester 11 on the equipment to the power line conductor of the cable sample 10 under test, and the negative electrode to the ground conductor of the cable sample 10 under test, turn on the voltage withstand switch, and adjust the voltage to the required value, preferably, the value is 3kV; at this point, the entire test is completed, and the relevant data of the test counterweight weight, free fall height and whether the voltage withstand is passed are recorded. Whether the mechanical impact test at this level is passed is based on whether the insulation of the cable power line is broken down. If it is not broken down, it passes, otherwise it fails.

[0024] The structure of the utility model is simple. During the use of the cable, it is in a static state. A single cable can be tested multiple times through program setting. Each cable can repeatedly test the anti-mechanical shock performance parameter data at different positions, different heights, and different weights, thereby eliminating the contingency existing in a single test.

[0025] Although there are already testing machines on the market that meet the standard requirements, according to the actual use feedback results of customers, cables that meet the anti-mechanical shock performance requirements of the standards do not have good performance in actual use. For this utility model patent, in addition to meeting the 20 kg / 1.5 m test requirements specified by the standard, it can also provide test conditions of 100 kg / 6 m or even higher requirements. Through such higher anti-mechanical shock requirements, it can ensure that the cable has better anti-mechanical shock performance during the mining process, greatly improving the service life of the cable and creating better economic benefits for users.

[0026] The above content clearly and completely describes the technical solutions in the embodiments of the utility model, so that those skilled in the art can better understand the advantages and features of the utility model, thereby making a clearer definition of the protection scope of the utility model. The described embodiments of the utility model are only a part of the embodiments of the utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the utility model without creative efforts belong to the protection scope of the utility model.

Claims

1. A cable mechanical impact tester, characterized in that: It includes a servo motor reducer module (1), a steel wire rope (2), a linear guide rail (3), an electric magnet (4), a counterweight mounting plate slide (5), a counterweight block (6), a tested cable placement slide (7), a laser displacement sensor (8), an electric cylinder (9), a tested cable sample (10) and a withstand voltage tester (11); A counterweight mounting plate slide (5) that can move up and down is installed on the linear guide rail (3), the counterweight block (6) is installed at the bottom of the counterweight mounting plate slide (5), and an electric magnet (4) is installed on the top of the counterweight mounting plate slide (5); A servo motor reducer module (1), a steel wire rope (2) and a laser displacement sensor (8) are fixedly installed on the top of the linear guide rail (3); the stretching of the steel wire rope (2) is controlled by the servo motor reducer module (1); the steel wire rope (2) is connected to an electric magnet (4); and the electric magnet (4) is energized to absorb the counterweight mounting plate slide (5); A tested cable placement slider (7) is fixedly installed at the bottom end of the linear guide rail (3), and electric cylinders (9) are installed on both the left and right sides of the tested cable placement slider (7). A slide groove is provided in the middle of the tested cable placement slider (7), and the tested cable sample (10) is placed in the slide groove. By controlling the electric cylinder (9) to move the tested cable placement slider (7), the tested cable sample (10) is automatically positioned directly below the counterweight block (6); Disconnecting the power of the electric magnet (4) allows the weight mounting plate slide (5) to fall freely and accelerate, and finally acts on the surface of the cable sample (10) under test; The positive electrode of the voltage withstand tester (11) is connected to the power line conductor of the tested cable sample (10), and the negative electrode is connected to the ground conductor of the tested cable sample (10), so as to measure the pressure on the tested cable sample (10).

2. The cable mechanical impact tester according to claim 1, characterized in that: The laser displacement sensor (8) is used to control the counterweight mounting plate slide (5) to move up and down to a specified height position.

3. The cable mechanical impact tester according to claim 1, characterized in that: The counterweight of the counterweight block (6) can reach 100 kg.

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