Grounding cable fatigue test device

Abstract

The utility model relates to the technical field of cable fatigue tests, and discloses a grounding cable fatigue test device. The device specifically comprises a device body, a mounting framework, a mounting plate and a transmission assembly, the transmission assembly is provided with a connecting shaft, one end of the connecting shaft is provided with a driving motor, the other end of the connecting shaft is sleeved with a cable connecting piece, and the cable connecting piece is provided with a first fixing part; a fixing piece is arranged at the bottom end of the mounting framework, the position of the fixing piece corresponds to that of the cable connecting piece, the fixing piece is provided with mounting columns which are oppositely arranged, the mounting columns are sleeved with pulleys, a gap is formed between the two mounting columns, a bending piece is arranged at the gap, the top end of the bending piece is provided with a second fixing part, and a weight is hung at the bottom end of the bending piece; according to the utility model, the stretching and twisting functions are integrated into the same device, so that the simulation of the multi-dimensional stress state of the cable is realized, and the effect of improving the accuracy and comprehensiveness of the test result is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable fatigue test technical field, specifically, relate to a grounding cable fatigue test device. BACKGROUND

[0002] The grounding cable fatigue test device is widely used in electrical equipment and power system, and is used for detecting the durability and reliability of the grounding cable under long-time use or specific conditions. With the rapid development of the power industry, the quality requirement of the grounding cable is higher and higher, so the fatigue test of the cable becomes an important link to ensure its performance stability. The test device can not only simulate the stress change in the actual working environment, but also effectively evaluate the service life and safety of the cable, thereby providing important guarantee for the stable operation of the power system.

[0003] At present, for the fatigue test of the grounding cable, the industry usually adopts the following methods: one is to test through a simple manual stretching device, and the operator needs to repeatedly pull the cable to simulate the actual stress condition; two is to use a fixed support to suspend a weight, and then fix the two ends of the cable and apply a constant tension; three is to use a rotary test machine, which drives the cable to periodically twist or bend through a motor. Although these methods can meet the test requirements to some extent, their implementation methods are relatively single, and they cannot simultaneously consider the tensile and torsional fatigue tests of the cable. UTILITY MODEL CONTENTS

[0004] The utility model provides a kind of grounding cable fatigue test device, it can overcome the certain defect or some defects of prior art.

[0005] To achieve the above object, the utility model is realized by the following technical scheme, which comprises: device body, the device body is box body, and its inside is formed with a cavity, a mounting framework is arranged in the cavity, an installation plate is arranged at the top end of the mounting framework, a transmission assembly is arranged on the installation plate, the transmission assembly has rotatable connecting shaft, one end of the connecting shaft is provided with a driving motor, the other end of the connecting shaft is sleeved with cable connecting piece, the cable connecting piece has first fixing part for installing one end of grounding cable;

[0006] The bottom end of the mounting framework is provided with a fixing part, the position of the fixing part corresponds to the cable connecting piece, the fixing part has oppositely arranged mounting columns, a pulley is sleeved on the mounting column, a gap is formed between the two mounting columns, a bending piece is arranged at the gap, the top end of the bending piece has second fixing part for installing the other end of the cable, and a weight is hung at the bottom end of the bending piece.

[0007] As preferred, the bending piece has a fixing plate, a torsion plate and a hook connected in sequence, the second fixing part is arranged at the top end of the fixing plate, the torsion plate has a 90-degree torsion angle, and the torsion plate further has two curved surfaces for cooperating with the two pulleys respectively.

[0008] As preferred, the number of the transmission assemblies is three, each of the transmission assemblies has two bases, the two bases in each of the transmission assemblies are connected through the connecting shaft, the connecting shaft is sleeved with synchronous pulleys, and the adjacent synchronous pulleys are driven through the synchronous belt.

[0009] As preferred, the mounting plate is provided with a counting sensor.

[0010] As preferred, the side surface and the front surface of the device body are respectively provided with a side door and a front door.

[0011] As preferred, the front surface of the device body is provided with a display screen, and the display screen is provided with a correction button.

[0012] As preferred, the mounting plate is provided with a tensioning plate for cooperating with the synchronous pulleys.

[0013] As preferred, the bottom end of the device body is provided with a moving wheel.

[0014] With the above technical scheme, the utility model has the following technical effects:

[0015] 1. The transmission assembly drives the cable connecting piece to rotate through the connecting shaft, cooperates with the driving motor, can simulate the actual stress state of the cable, and performs dynamic fatigue test;

[0016] 2. The cooperation of the fixing part with the mounting column and the pulley provides stable support and guidance for the other end of the cable;

[0017] 3. The second fixing part of the bending piece is used for fixing the other end of the cable, and in combination with the weight hung at the bottom end, a constant tension can be applied to simulate the load condition in actual use;

[0018] 4. The 90-degree torsion angle design of the torsion plate simulates the typical stress state of the cable in actual use, and improves the accuracy of the test results;

[0019] 5. By arranging three transmission assemblies, fatigue test can be performed on multiple grounding cables at the same time, and the test efficiency is significantly improved;

[0020] In summary, through the cooperation of the transmission assembly, the driving motor and the cable connecting piece and the like, periodic stretching and torsion operations can be realized on the grounding cable, so that multiple stress state tests of the cable can be completed in the same test process, and the comprehensiveness and accuracy of the test results are improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the appearance schematic view of the ground cable fatigue test device in the embodiment of the application;

[0022] Figure 2 It is the front view sectional view of the ground cable fatigue test device in the embodiment of the application;

[0023] Figure 3 It is the ground cable fatigue test device in the embodiment of the application in the top view sectional view;

[0024] Figure 4 It is the structure schematic view of the fixing part in the embodiment of the application. DETAILED DESCRIPTION

[0025] In order to further understand the content of the present application, the present application will be described in detail in combination with the embodiments. It should be understood that the embodiments are only used to explain but not limit the present application. EMBODIMENT

[0026] The inventor of the present application found that the existing ground cable fatigue test device cannot realize the collaborative test of cable stretching and twisting in the same test process, resulting in that the test result is not comprehensive enough and it is difficult to truly reflect the fatigue performance of the cable under complex working conditions. Therefore, the present application mainly adopts the following scheme, by integrating the stretching and twisting functions into the same device, the simulation of the multi-dimensional stress state of the cable is realized, and the effects of improving the accuracy and comprehensiveness of the test result are achieved; therefore, as shown in the present application, a ground cable fatigue test device is provided, the inventor of the present application found that the existing ground cable fatigue test device cannot realize the collaborative test of cable stretching and twisting in the same test process, resulting in that the test result is not comprehensive enough and it is difficult to truly reflect the fatigue performance of the cable under complex working conditions. Figure 1

[0027] Therefore, the present application mainly adopts the following scheme, by integrating the stretching and twisting functions into the same device, the simulation of the multi-dimensional stress state of the cable is realized, and the effects of improving the accuracy and comprehensiveness of the test result are achieved.

[0028] As shown in the present application, a ground cable fatigue test device is provided, specifically, in combination with Figure 1 Figure 2 and Figure 3 ​​As shown, the device includes device body 105, mounting skeleton 202, transmission assembly, drive motor 303, cable connecting piece 201, fixing piece 107 and bending piece and other components. Among them, the device body 105 is a box body, and a cavity is formed in the inside, and a mounting skeleton 202 is arranged in the cavity, and a mounting plate 306 is arranged at the top end of the mounting skeleton 202, and the transmission assembly is arranged on the mounting plate 306; the fixing piece 107 is arranged at the bottom end of the mounting skeleton 202, and the fixing piece 107 is arranged opposite to the cable connecting piece 201, and is used for cooperating to complete the stretching and torsion test of the cable.

[0029] As shown in Figure 3 , the transmission assembly includes a base 301, a connecting shaft 307, a synchronous pulley and a synchronous belt 305. The base 301 is a rectangular steel plate structure, and the material can be selected from stainless steel or aluminum alloy to ensure the structural strength and corrosion resistance. The connecting shaft 307 is a cylindrical shaft, and the shaft is provided with a synchronous pulley. The adjacent synchronous pulleys are driven by the synchronous belt 305, and the synchronous belt 305 is made of high-strength rubber material, and the surface is provided with a toothed structure to ensure smooth transmission without sliding. The number of transmission assemblies is three, and each transmission assembly has two bases 301, thereby forming a multi-point support to enhance the stability of the device.

[0030] The cable connecting piece 201 is sleeved on one end of the connecting shaft 307, and the cable connecting piece 201 has a first fixing part, and the first fixing part is provided with a mounting groove, and one end of the cable can be mounted in the mounting groove and fixed by a fastener. The drive motor 303 is installed on the other end of the connecting shaft 307, and a servo motor or a stepping motor is selected, which has high-precision control and programmable characteristics, and can accurately adjust the stretching speed and torque of the cable.

[0031] In combination Figure 4 , the fixing piece 107 includes mounting columns 405 and pulleys 404, the pulleys 404 are installed on the mounting columns 405, a gap is formed between the two mounting columns 405 for accommodating the bending piece, and the bending piece cooperates with the pulleys 404 through the gap to realize the torsion action of the cable.

[0032] The bending piece includes a fixed plate 401, a torsion plate 402 and a hook 403, the torsion plate 402 has a torsion angle of 90 degrees, and curved surfaces are arranged on both sides of the torsion plate 402, and the curved surfaces form rolling friction when contacting with the pulleys 404. The second fixing part is arranged at the top end of the fixed plate 401, and is used for connecting the other end of the cable, and the hook 403 is located at the bottom end of the bending piece, and is used for hanging the weight 106. The weight of the weight 106 can be adjusted according to the test requirements to apply different tension.

[0033] The installation plate 306 is further provided with a tensioning plate 302, which is an L-shaped steel plate made of carbon steel and fixed on the installation plate 306 by bolts. The tensioning plate 302 cooperates with the synchronous pulley to adjust the tension of the synchronous belt 305, so as to ensure the stability and reliability of the transmission system.

[0034] The implementation principle of the grounding cable fatigue test device in the application is that the driving motor 303 drives the connecting shaft 307 to rotate, the cable connecting piece 201 on the connecting shaft 307 swings, at the same time, the upward tension of the cable drives the bending piece to displace upward, at this time, the bending piece drives the fixed plate 401 to rotate 90 degrees under the extrusion of the pulley 404, and the cable connected with the fixed plate 401 is also twisted 90 degrees, therefore, the tension and torsion cooperative fatigue test of the cable is realized by the tension of the weight 106 hung by the hook 403, this design not only improves the accuracy of the test results, but also enhances the applicability of the device, and can meet the test requirements of cables of different specifications.

[0035] In some embodiments, a counting sensor 304 and a display screen 101 are added. The counting sensor 304 is installed on the installation plate 306 and used to detect the number of rotations and the angle of the connecting shaft 307. The front surface of the device body 105 is provided with the display screen 101, which is a liquid crystal touch screen and can display the test data in real time and has a correction button function, so as to facilitate the user to adjust and calibrate the parameters.

[0036] The rotation information of the connecting shaft 307 is collected by the counting sensor 304 and transmitted to the display screen 101 for real-time display, so that the user can intuitively observe various parameters in the test process. When it is necessary to adjust the test conditions, the parameters can be corrected through the correction button to ensure the accuracy and consistency of the test results.

[0037] In other embodiments, the number of rotations and the angle of the connecting shaft 307 are counted by driving the torque of the inductive motor through the programmable controller PLC, and the test data is transmitted to the display screen 101 for display.

[0038] In some embodiments, the side surface and the front door 103 of the device body 105 are respectively provided with a side door 102 and a front door 103, which facilitates the user to maintain and replace the parts of the equipment. The door plate of the front door 103 is made of transparent acrylic, which not only ensures safety, but also facilitates observation of the internal structure. In addition, the bottom end of the device body 105 is provided with a mobile wheel 104, which is selected from universal wheels and has a locking function, which facilitates the carrying and positioning of the equipment.

[0039] By setting the positive side door 102 and the moving wheel 104, the portability and maintainability of the device are improved, the user can replace parts and repair without disassembling the equipment, and it is also convenient to move the equipment to different test sites, improving the use flexibility.

[0040] The above embodiments realize comprehensive improvement of the grounding cable fatigue test device through reasonable layout and optimization design, solve the problem that the existing technology cannot simultaneously consider cable stretching and torsion test, and provide a strong guarantee for stable operation of a power system.

[0041] It is easy to understand that, based on one or more embodiments provided in the present application, a person skilled in the art can combine, split, recombine, etc. the embodiments of the present application to obtain other embodiments, and these embodiments do not exceed the protection scope of the present application.

[0042] The utility model and its implementation mode are described above, and the description is not restrictive. The embodiments shown are only part of the implementation mode of the utility model, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by this, without departing from the creative purpose of the utility model, similar structure modes and embodiments can be designed without creativity, which should belong to the protection scope of the utility model.

Claims

1. A ground cable fatigue testing apparatus, characterized by: The device body (105) is a box, and a cavity is formed in the device body (105). An installation framework (202) is arranged in the cavity. An installation plate (306) is arranged at the top end of the installation framework (202). A transmission assembly is arranged on the installation plate (306). The transmission assembly has a rotatable connecting shaft (307). A driving motor (303) is arranged at one end of the connecting shaft (307). A cable connecting piece (201) is arranged at the other end of the connecting shaft (307). The cable connecting piece (201) has a first fixing part for fixing one end of a grounding cable. A fixing part (107) is arranged at the bottom end of the installation framework (202). The position of the fixing part (107) corresponds to the position of the cable connecting piece (201). The fixing part (107) has oppositely arranged installation columns (405). Pulleys (404) are arranged on the installation columns (405). A gap is formed between the two installation columns (405). A bending part is arranged in the gap. The bending part has a second fixing part for fixing the other end of the grounding cable. A weight (106) is hung at the bottom end of the bending part.

2. The ground cable fatigue testing device of claim 1, wherein: The bending part has a fixing plate (401), a torsion plate (402) and a hook (403) connected in sequence. The second fixing part is arranged at the top end of the fixing plate (401). The torsion plate (402) has a 90-degree torsion angle. The torsion plate (402) has two curved surfaces for cooperating with the two pulleys (404).

3. A ground cable fatigue testing apparatus according to claim 2, wherein: The number of the transmission assemblies is three. Each transmission assembly has two bases (301). The two bases (301) in each transmission assembly are connected by the connecting shaft (307). Synchronous pulleys are arranged on the connecting shaft (307). The adjacent synchronous pulleys are driven by a synchronous belt (305).

4. The ground cable fatigue testing apparatus of claim 1, wherein: A counting sensor (304) is arranged on the installation plate (306).

5. The ground cable fatigue testing apparatus of claim 1, wherein: A side door (102) and a front door (103) are arranged on the side and the front of the device body (105), respectively.

6. The ground cable fatigue testing apparatus of claim 1, wherein: A display screen (101) is arranged on the front of the device body (105). A correction button is arranged on the display screen (101).

7. The ground cable fatigue testing apparatus of claim 3, wherein: A tensioning plate (302) is arranged on the installation plate (306). The tensioning plate (302) is used for cooperating with the synchronous pulleys.

8. The ground cable fatigue testing apparatus of claim 1, wherein: A moving wheel (104) is arranged at the bottom end of the device body (105).

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