Low-temperature-resistant strength testing device for cable protection pipe

Abstract

The utility model discloses a low-temperature-resistant strength testing device for a cable protection tube, and relates to the technical field of wires and cables. The device comprises a temperature control test box and a heating support rod, the top of one end of the temperature control test box is connected with a spraying pipe in a penetrating and clamping mode, a landfill groove is formed in the temperature control test box, the heating support rod is arranged in the temperature control test box, one end of the heating support rod is connected with a sliding block in a clamping mode, and a stepping motor is arranged at the top of the sliding block. By arranging the temperature control test box and the heating support rod, the problems that when a cable is put into use, the position and humidity of the cable are different, the actual use environment of the cable protection shell is difficult to simulate by a test device, and when the cable is actually rocky, certain heat is generated for transportation of electric power and the like, and the service life of the cable protection shell is influenced are solved. A large temperature difference exists inside and outside the cable protection shell, and the device is difficult to detect the low-temperature-resistant strength of the cable protection tube in actual use.

Description

Technical Field

[0001] This utility model belongs to the field of wire and cable technology, and in particular relates to a low-temperature strength testing device for cable protection pipes. Background Technology

[0002] A cable is an electrical or signal transmission device, typically composed of several or groups of conductors. It is mainly classified into power cables, control cables, shielded cables, high-temperature cables, signal cables, coaxial cables, fire-resistant cables, aluminum alloy cables, etc. Cables are widely used in power systems, information transmission, instrumentation systems, and other fields. When cables are put into use, to ensure their normal operation, cable protection pipes are usually installed on their outer side. Cable protection pipes are metal protective pipes with a certain mechanical strength, laid on the outer layer of the cable to prevent damage. Cable protection pipes are mainly installed at the intersection of communication cables and power lines to prevent short circuits caused by power line breaks, which could lead to energization of communication cables and steel wire ropes. This protects the cable, switch, circuit board, and even the entire device from burning out. They also provide some isolation against magnetic field interference from power lines. During the design and production of cable protection pipes, various testing devices are usually used to test various performance characteristics of the cable to check the service life of the cable protection pipe in harsh environments, ensuring the protective effect of the cable protection pipe on the cable. However, in actual use, it still has the following drawbacks:

[0003] When performing performance tests on cable protection pipes, it is necessary to test the low-temperature resistance of the cable protection pipes. However, the testing equipment often only tests the low-temperature resistance of the cable protection pipes by adjusting the temperature of the environment in which the protection pipes are located. When the cable is actually put into use, the low-temperature resistance of the protection pipes is often affected by the ambient humidity. When the air humidity is high or it is raining, ice may form on the surface of the protection pipes. Therefore, the test results of the equipment are difficult to represent the low-temperature resistance of the protection pipes in actual use.

[0004] When cables are in use, the transmission of electricity often generates heat. However, when testing cable protection pipes with testing devices, only the damage caused by the external environment is considered, ignoring the damage caused by the temperature difference between the inside and outside of the cable protection pipe. In actual use, cables may be placed outdoors, on the surface, or buried underground. The device cannot simulate the damage to the cable protection shell caused by the environment when the cable is in different locations, and it is difficult to test the low-temperature resistance of the cable protection pipe in actual use. Utility Model Content

[0005] The purpose of this invention is to provide a low-temperature strength testing device for cable protection pipes. By using a temperature-controlled testing chamber and a heating support rod, it solves the problem that the testing device cannot simulate the actual use environment of the cable protection shell due to differences in the environment and humidity when the cable is put into use. Furthermore, the testing of cable protection shells often directly tests the performance of the cable protection shell, but in actual use, the transmission of electricity by the cable generates a certain amount of heat, resulting in a large temperature difference between the inside and outside of the cable protection shell, making it difficult for the device to detect the low-temperature strength of the cable protection pipe in actual use.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model is a low-temperature strength testing device for cable protection pipes, including a temperature control test chamber and a heating support rod. A spray pipe is inserted and snapped through the top of one end of the temperature control test chamber. A filling groove is opened inside the temperature control test chamber. A heating support rod is installed inside the temperature control test chamber. A slider is snapped through one end of the heating support rod. A stepper motor is installed on the top of the slider.

[0008] The spray pipe sprays cold water into the temperature-controlled test chamber, increasing the humidity within the device. This allows the cable protection tube to withstand low temperatures in a high-humidity environment, improving the accuracy of the test results. By filling the landfill with sand, the cable protection tube is moved up and down by a slider driven by a stepper motor during testing. This movement allows the cable protection tube to be suspended above, attached to, or buried in the sand within the temperature-controlled test chamber, testing the cable's low-temperature resistance in different environments. The heating support rod heats the inside of the cable protection tube, creating a significant temperature difference between the inside and outside, simulating the low-temperature resistance of the cable's protective shell during use, ensuring the accuracy of the test results.

[0009] Furthermore, a lid is rotatably snapped onto one end of the temperature control test chamber, anti-slip and heat-insulating pads are snapped and fixed around the bottom of the temperature control test chamber, a drain pipe is welded through the bottom of one side of the temperature control test chamber, and a semiconductor refrigeration chip is snapped and fixed onto the other side of the temperature control test chamber.

[0010] The temperature control test chamber can be cooled by a semiconductor cooling chip, keeping the chamber at a low temperature to test the low-temperature resistance of the cable protection device. Excess water can be sprayed out through the drain pipe, and a mesh can be installed inside the drain pipe to prevent sand and soil in the landfill from being discharged with the water flow.

[0011] Furthermore, a sliding groove is provided at one end of the temperature control test chamber, and a heating tube is snapped and fixed inside the temperature control test chamber, with the heating tube located at the bottom of the landfill trench;

[0012] By filling the landfill with sand, the cable protection pipe can be suspended above the sand, attached to the sand surface, or buried in the sand during testing. This allows for testing the cable's low-temperature resistance in different environments. The heating pipe can heat the sand in the landfill, preventing the sand with high water content from freezing and making it difficult to quickly bury the cable protection pipe when needed. Furthermore, the heating pipe can heat the temperature control test chamber, keeping it at a high temperature to test the cable protection pipe's protective performance at high temperatures, thus improving the flexibility of the device.

[0013] Furthermore, a replaceable support tube is snapped onto the outer circumferential surface of the heating support rod, a threaded tube is snapped through the top of the slider, and the slider is slidably snapped into the groove.

[0014] Staff can select a suitable replacement support tube based on the size of the cable protection tube to support it, ensuring the stability of the cable protection tube during testing. The replacement support tube can be heated by heating the support rod, creating a large temperature difference between the inside and outside of the cable protection tube, simulating the low-temperature resistance of the cable protection shell during actual use, and ensuring the accuracy of the test results.

[0015] Furthermore, a threaded rod is rotatably engaged at the bottom of the stepper motor, the stepper motor is fixed inside the temperature control test chamber, the threaded rod is inserted through the slide groove, and the threaded rod is screwed through the top of the threaded tube;

[0016] The stepper motor drives the rotation of the threaded rod, which in turn drives the slider and heating support rod to slide along the groove, allowing the cable protection tube to move up and down and adjust its position without manual adjustment, thus improving the ease of use of the testing device.

[0017] This utility model has the following beneficial effects:

[0018] This invention solves the problem of testing the low-temperature resistance of cable protection pipes during performance testing by setting up a temperature-controlled testing chamber. Traditional testing devices often only adjust the ambient temperature of the protection pipe to measure its low-temperature resistance. However, in actual use, the low-temperature resistance of the protection pipe is often affected by ambient humidity. When the air humidity is high or it rains, ice may form on the surface of the protection pipe, making the test results difficult to represent its actual low-temperature resistance in real-world use. When the cable protection pipe is placed in the temperature-controlled testing chamber, a semiconductor cooling chip maintains an extremely low temperature inside the chamber, and cold water is sprayed into the chamber through a spray pipe to increase humidity. This allows the cable protection pipe to be tested for its low-temperature resistance in a low-temperature, high-humidity environment, improving the accuracy of the test results.

[0019] This invention addresses the problem of cables generating heat during power transmission. While testing cable protection tubes often only considers environmental damage, neglecting the temperature difference between the inside and outside of the tube, and considering that cables may be placed outdoors, on the surface, or buried underground, devices struggle to simulate the environmental damage and assess the low-temperature resistance of the tubes in different environments. By filling a landfill with sand, the cable protection tube can be suspended above, attached to, or buried within the sand in the temperature-controlled testing chamber, allowing for testing of its low-temperature resistance in various environments. The heating support rod heats the inside of the tube, creating a significant temperature difference that simulates the low-temperature resistance of the cable protection tube during use, ensuring accurate test results. Attached Figure Description

[0020] Figure 1 This is a structural rendering of the present invention;

[0021] Figure 2 This is a structural diagram of the temperature control test chamber of this utility model;

[0022] Figure 3 This is a cross-sectional view of the temperature control test chamber of this utility model;

[0023] Figure 4 This is a structural diagram of the heating support rod of this utility model.

[0024] Figure label:

[0025] 1. Temperature control test chamber; 101. Chamber lid; 102. Spray pipe; 103. Drain pipe; 104. Semiconductor cooling chip; 105. Anti-slip heat insulation pad; 106. Landfill trough; 107. Slide groove; 108. Heating tube; 2. Heating support rod; 201. Replaceable support tube; 202. Slider; 203. Threaded tube; 204. Threaded rod; 205. Stepper motor. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0027] Please see Figure 1-4As shown, this utility model is a low-temperature strength testing device for cable protection pipes, including a temperature control test chamber 1 and a heating support rod 2. A spray pipe 102 is inserted and snapped through the top of one end of the temperature control test chamber 1. A filling groove 106 is opened inside the temperature control test chamber 1. The heating support rod 2 is installed inside the temperature control test chamber 1. A slider 202 is snapped through one end of the heating support rod 2. A stepper motor 205 is installed on the top of the slider 202.

[0028] Depending on the required size of the cable protection pipe to be tested, take a suitable replacement support pipe 201 and snap it onto the outer circumference of the heating support rod 2. Slide the cable protection pipe onto the outer circumference of the replacement support pipe 201 and rotate to close the box cover 101. Control the semiconductor cooling chip 104 to exchange heat inside the temperature control test chamber 1, so that the temperature control test chamber 1 is at a low temperature. According to the required installation position of the cable protection pipe, control the stepper motor 205 to adjust the threaded rod 204 to rotate, further driving the heating support rod 2 and the cable protection pipe to move up and down, so that the cable protection pipe is suspended above the sand, or attached to the surface of the sand, or buried in the sand. At the same time, the heating support rod 2 heats the inside of the cable protection pipe, so that there is a large temperature difference between the inside and outside of the cable protection pipe. Spray cold water into the temperature control test chamber 1 through the spray pipe 102 to increase the humidity inside the device, so that the cable protection pipe can be tested for low temperature resistance in a low temperature and high humidity environment.

[0029] Among them, such as Figure 1-3 As shown, a lid 101 is rotatably snapped onto one end of the temperature control test chamber 1, and anti-slip heat insulation pads 105 are snapped and fixed around the bottom of the temperature control test chamber 1. A drain pipe 103 is welded through the bottom of one side of the temperature control test chamber 1, and a semiconductor cooling chip 104 is snapped and fixed onto the other side of the temperature control test chamber 1. A sliding groove 107 is opened at one end inside the temperature control test chamber 1, and a heating tube 108 is snapped and fixed inside the temperature control test chamber 1. The heating tube 108 is located at the bottom of the landfill trough 106.

[0030] A large amount of sand is filled into the landfill trench 106. Depending on the actual usage environment of the cable protection pipe, the cable protection pipe is either suspended above the sand, attached to the surface of the sand, or buried in the sand. After the cable protection pipe is placed in the temperature control test chamber 1, the semiconductor cooling chip 104 is controlled to exchange heat with the temperature control test chamber 1, so that the temperature control test chamber 1 is at a low temperature. Cold water is sprayed into the temperature control test chamber 1 through the spray pipe 102, and excess water is discharged through the drain pipe 103, so that the temperature control test chamber 1 is in a low temperature and high humidity environment, and the low temperature resistance of the cable protection pipe is tested.

[0031] Among them, such as Figure 1 , 4As shown, a replaceable support tube 201 is snapped onto the outer periphery of the heating support rod 2, a threaded tube 203 is snapped through the top of the slider 202, the slider 202 is slidably snapped into the slide groove 107, a threaded rod 204 is snapped into the bottom of the stepper motor 205, the stepper motor 205 is snapped and fixed inside the temperature control test chamber 1, the threaded rod 204 is inserted through the slide groove 107, and the threaded rod 204 is screwed through the top of the threaded tube 203;

[0032] According to the size of the cable protection pipe, the staff takes a suitable replacement support pipe 201 and snaps it onto the outer circumference of the heating support rod 2. The cable protection pipe is then fitted onto the outer circumference of the replacement support pipe 201. When testing the cable protection pipe, the replacement support pipe 201 is heated by the heating support rod 2, so that there is a large temperature difference between the inside and outside of the cable protection pipe. As needed, the stepper motor 205 is controlled to drive the rotation of the threaded rod 204, which in turn drives the slider 202 and the heating support rod 2 to slide along the slide groove 107, so that the cable protection pipe moves up and down and the position of the cable protection pipe is adjusted.

[0033] The specific working principle of this utility model is as follows: Workers fill a large amount of sand into the landfill trough 106, and according to the size of the cable protection pipe, take a suitable replacement support pipe 201 and snap it onto the outer circumference of the heating support rod 2. Then, the cable protection pipe is fitted onto the outer circumference of the replacement support pipe 201. The box cover 101 is closed, and according to the actual usage position of the cable protection pipe, the stepper motor 205 is controlled to drive the rotation of the threaded rod 204, further driving the slider 202 and the heating support rod 2 to slide along the slide groove 107, allowing the cable... The protective tube moves up and down, suspending the cable protection tube above the sand, or adhering to the sand surface, or burying it in the sand. The semiconductor cooling chip 104 controls the heat exchange inside the temperature control test chamber 1, keeping the temperature control test chamber 1 at a low temperature. Cold water is sprayed into the temperature control test chamber 1 through the spray pipe 102, creating a low-temperature and high-humidity environment inside the temperature control test chamber 1. At the same time, the replaceable support tube 201 is heated by the heating support rod 2, creating a large temperature difference between the inside and outside of the cable protection tube, thus testing the low-temperature resistance of the cable protection tube.

[0034] The above are merely preferred embodiments of the present utility model and do not limit the present utility model. Any modifications, equivalent substitutions, or improvements made to the technical solutions described in the foregoing embodiments, or to some of the technical features, shall fall within the protection scope of the present utility model.

Claims

1. A low temperature resistance testing device for cable protection pipes, comprising a temperature-controlled testing chamber (1) and a heating support rod (2), characterized in that: The temperature control test box (1) one end top through the clamping has the spray pipe (102), the temperature control test box (1) is set up in the landfill groove (106), the temperature control test box (1) is provided with the heating support rod (2), the heating support rod (2) one end clamping has the sliding block (202), the sliding block (202) top is provided with the step motor (205).

2. A device for testing the low temperature resistance of a cable protection pipe according to claim 1, characterized in that: The temperature control test box (1) one end rotation clamping has the box cover (101), the temperature control test box (1) bottom all around clamping fixedly has the antiskid heat insulation pad (105), the temperature control test box (1) one side bottom penetrates the welding and has the drain pipe (103), the temperature control test box (1) the other side clamping fixedly has the semiconductor refrigerating sheet (104).

3. A device for testing the low temperature resistance of a cable protection pipe according to claim 1, characterized in that: The temperature control test box (1) one end is set up in the sliding slot (107), the temperature control test box (1) clamping fixedly has the heating pipe (108), the heating pipe (108) is located in the bottom of landfill groove (106).

4. A low temperature resistance testing device for cable protection pipes according to claim 3, characterized in that: The heating support rod (2) outer circumferential surface clamping has the replaceable support pipe (201), the sliding block (202) top penetrates the clamping and has the threaded tube (203), the sliding block (202) sliding clamping in sliding slot (107).

5. A low temperature resistance testing device for cable protection pipes according to claim 4, characterized in that: The step motor (205) bottom rotation clamping has the threaded rod (204), the step motor (205) clamping fixedly in the temperature control test box (1) interior, the threaded rod (204) penetrates the insertion in sliding slot (107), the threaded rod (204) penetrates the rotation and is connected in the threaded tube (203) top.

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