Power cable tension detection device

Abstract

The invention relates to the technical field of power cable detection, and discloses a power cable tension detection device which comprises a bottom plate and supporting legs, a warning mechanism is arranged above the bottom plate and comprises a first mounting plate, a placement box, a sound production box, a sound amplification cover and a belt, and the bottom of the first mounting plate is connected with the top of the placement box. The bottom of the first mounting plate is connected with the top of the sound production box, and the inner side of the first mounting plate is connected with the outer wall of the sound amplification cover. According to the invention, a sound can be generated while a power cable is stretched, so that an operator can be better reminded to carry out tension detection work, and the problems that in actual use, the power cable is generally directly subjected to stretching detection, and the power cable cannot be stretched for a certain distance in the detection process to be reminded, so that the detection efficiency is improved are solved. Therefore, the working efficiency of the tension detection device is improved, and the tension detection device is relatively practical and suitable for being widely popularized and used.

Description

Technical Field

[0001] This invention belongs to the field of power cable testing technology, specifically, it relates to a power cable tensile testing device. Background Technology

[0002] Power cables are cables used to transmit and distribute electrical energy. They are commonly used in urban underground power grids, power plant lead-out lines, internal power supply for industrial and mining enterprises, and underwater power transmission lines across rivers and seas. During the production process, in order to ensure the quality of the cables when they are put into use, it is necessary to conduct random inspections of the cables during production and test their tensile strength.

[0003] Existing tensile testing devices fix both ends of the power cable separately before performing tensile testing. However, in actual use, the power cable is usually stretched directly during the test. This makes it impossible to extend the power cable a certain distance before providing a warning, which prevents operators from accurately determining the testing location and reduces the efficiency of the tensile testing device.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows: A power cable tensile testing device includes a base plate and supporting legs. A warning mechanism is installed above the base plate. The warning mechanism includes a mounting plate, a placement box, a sound-emitting box, a loudspeaker cover, and a belt. The bottom of the mounting plate is connected to the top of the placement box, and the bottom of the mounting plate is connected to the top of the sound-emitting box. The inner side of the mounting plate is connected to the outer wall of the loudspeaker cover. A worm gear is connected to the belt drive. A worm wheel meshes with the outer wall of the worm gear. A rotating rod is installed on the inner wall of the worm wheel, and a striking plate is installed on the outer wall of the rotating rod. A wedge-shaped block is slidably connected to the inner side of the mounting plate 1. A connecting rod is installed at the bottom of the wedge-shaped block. A piston plate 1 is installed at the bottom of the connecting rod. A piston box is slidably connected to both ends of the piston plate 1. A gas guide pipe is connected to one side of the piston box. A piston box 2 is connected to one end of the gas guide pipe. A piston plate 2 is slidably connected to the inner wall of the piston box 2. A piston rod 2 is installed on one side of the piston plate 2. A fixing plate is installed at one end of the piston rod 2. A hollow tube is installed inside the fixing plate. A movable plate is slidably connected to the top of the mounting plate 1. A fixing mechanism is provided above the base plate.

[0006] In a preferred embodiment of the present invention, the fixing mechanism includes a connecting plate, a second mounting plate, a first motor, a second rotating rod, and a rotating roller. One side of the connecting plate is connected to one end of the second mounting plate, and one side of the second mounting plate is connected to one end of the first motor. The output end of the first motor is connected to one end of the second rotating rod. The outer wall of the second rotating rod is connected to the inner wall of the rotating roller, and the outer wall of the rotating roller is connected to the inner wall of the limiting plate. A guide rod is installed on the top of the second mounting plate, and a sliding plate is slidably connected to the outer wall of the guide rod. A first placement plate is installed on one end of the sliding plate, and a sliding rod is installed on the bottom of the first placement plate. A first limiting rod is threadedly connected to the inner wall of the first placement plate.

[0007] In a preferred embodiment of the present invention, a detection mechanism is provided above the base plate. The detection mechanism includes a second motor, a threaded rod, a bearing plate, a telescopic rod, and a third mounting plate. The output end of the second motor is connected to one end of the threaded rod. The outer wall of the threaded rod is threadedly connected to the inner wall of the bearing plate. One side of the bearing plate is connected to one end of the telescopic rod, and the other end of the telescopic rod is connected to one side of the third mounting plate. A second placement plate is mounted on one side of the bearing plate, and a third placement plate is mounted on one side of the bearing plate. An adjusting rod is threadedly connected to the inner wall of the third placement plate, and a second limit rod is threadedly connected to the inner wall of the third placement plate. A fourth mounting plate is mounted at the bottom of the second mounting plate, and a tension sensor is mounted on one side of the fourth mounting plate.

[0008] In a preferred embodiment of the present invention, the number of sound-emitting boxes is three, which are arranged in a triangular pattern inside the placement box. The number of sound-amplifying covers is three, which are arranged in a triangular pattern on the inner side of the mounting plate and located above the sound-emitting boxes and inside the placement box. This allows the wedge block to be moved by stretching and squeezing the power cable, thereby moving the hollow tube and generating an audible alert to the operator during the stretching and movement.

[0009] In a preferred embodiment of the present invention, there are three worm gears and three wedge blocks, which are symmetrically distributed on the inner side of the mounting plate. A spring is fixedly installed between the bottom of the piston plate and the inner side of the piston box. The bottom of the piston box is fixedly connected to the inner wall of the placement box, thereby driving the striking plate to rotate and producing sound after the hollow tube moves.

[0010] In a preferred embodiment of the present invention, the air duct is Z-shaped, and there are three hollow tubes symmetrically distributed on the inner walls of the three sound-generating boxes. The three hollow tubes have different lengths, gradually decreasing in length from left to right. There are two movable plates symmetrically distributed on the bottom of the support plate, which allows for quick and convenient adjustment of the position of the hollow tubes. Furthermore, due to the different lengths of the hollow tubes, different loud sounds can be generated to alert the operator.

[0011] In a preferred embodiment of the present invention, there are four connecting plates, which are symmetrically distributed on the top of the base plate. The outer wall of the rotating roller is provided with a spiral groove, and the bottom of the sliding rod is slidably connected to the inner wall of the spiral groove. There are two guide rods, which are symmetrically distributed on the top of the second mounting plate. The guide rods are L-shaped. A limiting hole is provided on the inner side of the first placement plate, so that one end of the power cable can be clamped and fixed quickly and conveniently, thereby effectively preventing the power cable from falling off when stretched, and better protecting the power cable.

[0012] In a preferred embodiment of the present invention, the outer wall of the threaded rod is connected to the outer wall of the worm gear via a belt drive, the bearing plate is T-shaped, and one end of the mounting plate is fixedly connected to one side of the connecting plate, thereby enabling the power cable to be stretched quickly and conveniently for tensile testing. Furthermore, the rotation of the threaded rod can drive the worm gear to rotate, thus enabling better use.

[0013] In a preferred embodiment of the present invention, the second and third placement plates are arc-shaped, the second placement plate has a limiting hole on its inner side, the bottom of the adjusting rod is rotatably connected to the top of the second placement plate, and one end of the tension sensor is connected to one side of the bearing plate, so that one end of the power cable can be clamped and fixed quickly and conveniently. The distance between the third placement plate and the second placement plate can be adjusted by the adjusting rod, so that different power cables can be fixed.

[0014] In a preferred embodiment of the present invention, the bottom of the base plate is fixedly connected to the top of the support leg, the top of the base plate is fixedly connected to the bottom of the placement box, the top of the base plate is fixedly connected to the bottom of the connecting plate, and one end of the mounting plate is fixedly connected to one end of the motor.

[0015] Compared with the prior art, the present invention has the following advantages: This invention enables the generation of sound while the power cable is being stretched through a warning mechanism installed above the base plate. This better alerts operators to perform tensile testing, solving the problem that in actual use, the power cable is usually stretched directly for testing, and it is not possible to stretch the cable a certain distance before issuing a warning, thus making it difficult for operators to accurately determine the testing position. This improves the working efficiency of the tensile testing device.

[0016] This invention enables the quick and convenient clamping and fixing of power cables through a fixing mechanism installed above the base plate. Simultaneously, the power cables are wound around a rotating roller, further securing them and effectively preventing them from falling or being damaged during tensile testing. This makes the device more convenient for operators and improves the working efficiency of the tensile testing device.

[0017] This invention enables the quick and convenient clamping and fixing of the other end of a power cable through a detection mechanism installed on the base plate, and also allows for the stretching of the power cable. By adjusting the distance between the second and third placement plates, power cables of different sizes can be clamped and fixed. By installing a tension sensor, the tension of the power cable can be monitored in real time, and with the help of a warning mechanism, the tension detection work can be better carried out, effectively improving the convenience of the tension detection device.

[0018] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0019] In the attached diagram: Figure 1 A three-dimensional structural diagram of a power cable tensile testing device; Figure 2 A cross-sectional structural schematic diagram of a power cable tensile testing device; Figure 3 This is a partial structural diagram of a power cable tensile testing device. Figure 4 A schematic diagram of the warning mechanism of a power cable tensile testing device. Figure 1 ; Figure 5 A schematic diagram of the warning mechanism of a power cable tensile testing device. Figure 2 ; Figure 6 A schematic diagram of the fixing mechanism of a power cable tensile testing device. Figure 1 ; Figure 7 A schematic diagram of the fixing mechanism of a power cable tensile testing device. Figure 2 ; Figure 8 A schematic diagram of the fixing mechanism of a power cable tensile testing device. Figure 3 ; Figure 9 A schematic diagram of the structure of a power cable tensile testing device. Figure 1 ; Figure 10 A schematic diagram of the structure of a power cable tensile testing device. Figure 2.

[0020] In the diagram: 1. Base plate; 2. Support leg; 3. Warning mechanism; 301. Mounting plate one; 302. Placement box; 303. Sound box; 304. Loudspeaker cover; 305. Belt; 306. Worm gear; 307. Worm wheel; 308. Rotating rod one; 309. Striking plate; 310. Wedge block; 311. Connecting rod; 312. Piston plate one; 313. Piston box; 314. Spring; 315. Air guide pipe; 316. Piston box two; 317. Piston plate two; 318. Piston rod two; 319. Fixing plate; 320. Hollow tube; 321. Moving plate; 4. Fixed Mechanism; 401, Connecting plate; 402, Mounting plate two; 403, Motor one; 404, Rotating rod two; 405, Rotating roller; 406, Limiting plate; 407, Guide rod; 408, Sliding plate; 409, Placement plate one; 410, Sliding rod; 411, Limiting rod one; 5, Detection mechanism; 501, Motor two; 502, Threaded rod; 503, Bearing plate; 504, Telescopic rod; 505, Mounting plate three; 506, Placement plate two; 507, Placement plate three; 508, Adjusting rod; 509, Limiting rod two; 510, Mounting plate four; 511, Tension sensor. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0022] Example 1: like Figures 1 to 10As shown, a power cable tensile testing device includes a base plate 1 and supporting legs 2. A warning mechanism 3 is installed above the base plate 1. The warning mechanism 3 includes a mounting plate 301, a placement box 302, a sound-emitting box 303, a loudspeaker cover 304, and a belt 305. The bottom of the mounting plate 301 is connected to the top of the placement box 302, and the bottom of the mounting plate 301 is connected to the top of the sound-emitting box 303. The inner side of the mounting plate 301 is connected to the outer wall of the loudspeaker cover 304. A worm gear 306 is driven by the belt 305. A worm wheel 307 meshes with the outer wall of the worm gear 306. A rotating rod 308 is installed on the inner wall of the worm wheel 307, and a striking plate 309 is installed on the outer wall of the rotating rod 308. A wedge block 310 is slidably connected to the inner side of mounting plate 301. A connecting rod 311 is installed at the bottom of the wedge block 310. A piston plate 312 is installed at the bottom of the connecting rod 311. A piston box 313 is slidably connected to both ends of the piston plate 312. A gas guide pipe 315 is connected to one side of the piston box 313. A piston box 316 is connected to one end of the gas guide pipe 315. A piston plate 317 is slidably connected to the inner wall of the piston box 316. A piston rod 318 is installed on one side of the piston plate 317. A fixing plate 319 is installed at one end of the piston rod 318. A hollow tube 320 is installed inside the fixing plate 319. A movable plate 321 is slidably connected to the top of mounting plate 301. In this embodiment, there are three sound-emitting boxes 303, which are arranged in a triangular pattern inside the placement box 302. There are also three sound-amplifying covers 304, which are arranged in a triangular pattern inside the mounting plate 301 and located above the sound-emitting boxes 303 and inside the placement box 302. This allows the wedge block 310 to be moved when the power cable is stretched and squeezed, thereby moving the hollow tube 320 and making a sound to remind the operator when it is stretched and moved. Furthermore, there are three worm gears 307 and three wedge blocks 310. The wedge blocks 310 are symmetrically distributed on the inner side of the mounting plate 301. A spring 314 is fixedly installed between the bottom of the piston plate 312 and the inner side of the piston box 313. The bottom of the piston box 313 is fixedly connected to the inner wall of the placement box 302, so that the striking plate 309 can be rotated and sound can be generated after the hollow tube 320 moves. Furthermore, the air duct 315 is Z-shaped, and there are three hollow tubes 320, which are symmetrically distributed on the inner walls of the three sound boxes 303. The three hollow tubes 320 have different lengths, gradually decreasing in length from left to right. There are two movable plates 321, which are symmetrically distributed on the bottom of the support plate 503. This allows for quick and convenient adjustment of the position of the hollow tubes 320. Moreover, due to the different lengths of the hollow tubes 320, different loud sounds can be produced to alert the operator.

[0023] Example 2: A fixing mechanism 4 is provided above the base plate 1; The fixing mechanism 4 includes a connecting plate 401, a second mounting plate 402, a first motor 403, a second rotating rod 404, and a rotating roller 405. One side of the connecting plate 401 is connected to one end of the second mounting plate 402, and one side of the second mounting plate 402 is connected to one end of the first motor 403. The output end of the first motor 403 is connected to one end of the second rotating rod 404. The outer wall of the second rotating rod 404 is connected to the inner wall of the rotating roller 405. The outer wall of the rotating roller 405 is connected to the inner wall of the limiting plate 406. A guide rod 407 is installed on the top of the second mounting plate 402. A sliding plate 408 is slidably connected to the outer wall of the guide rod 407. A placement plate 409 is installed on one end of the sliding plate 408. A sliding rod 410 is installed on the bottom of the placement plate 409. A limiting rod 411 is threadedly connected to the inner wall of the placement plate 409. In this embodiment, there are four connecting plates 401, which are symmetrically distributed on the top of the base plate 1. The outer wall of the rotating roller 405 is provided with a spiral groove. The bottom of the sliding rod 410 is slidably connected to the inner wall of the spiral groove. There are two guide rods 407, which are symmetrically distributed on the top of the second mounting plate 402. The guide rods 407 are L-shaped. A limit hole is provided on the inner side of the first placement plate 409, so that one end of the power cable can be clamped and fixed quickly and conveniently, thereby effectively preventing the power cable from falling off when stretched, and better protecting the power cable. Furthermore, the bottom of the base plate 1 is fixedly connected to the top of the support leg 2, the top of the base plate 1 is fixedly connected to the bottom of the placement box 302, the top of the base plate 1 is fixedly connected to the bottom of the connecting plate 401, and one end of the mounting plate 301 is fixedly connected to one end of the motor 501.

[0024] Example 3: A detection mechanism 5 is installed above the base plate 1; The testing mechanism 5 includes a second motor 501, a threaded rod 502, a bearing plate 503, a telescopic rod 504, and a third mounting plate 505. The output end of the second motor 501 is connected to one end of the threaded rod 502. The outer wall of the threaded rod 502 is threadedly connected to the inner wall of the bearing plate 503. One side of the bearing plate 503 is connected to one end of the telescopic rod 504. The other end of the telescopic rod 504 is connected to one side of the third mounting plate 505. A second placement plate 506 is installed on one side of the bearing plate 503. A third placement plate 507 is installed on one side of the bearing plate 503. An adjusting rod 508 is threadedly connected to the inner wall of the third placement plate 507. A second limit rod 509 is threadedly connected to the inner wall of the third placement plate 507. A fourth mounting plate 510 is installed at the bottom of the second mounting plate 402. A tension sensor 511 is installed on one side of the fourth mounting plate 510. In this embodiment, the outer wall of the threaded rod 502 is connected to the outer wall of the worm gear 306 via a belt 305. The bearing plate 503 is T-shaped, and one end of the mounting plate 305 is fixedly connected to one side of the connecting plate 401. This allows for quick and convenient stretching of the power cable for tensile testing. Furthermore, the rotation of the threaded rod 502 can drive the worm gear 306 to rotate, thus enabling better use. Furthermore, the second placement plate 506 and the third placement plate 507 are arc-shaped. The second placement plate 506 has a limit hole on its inner side. The bottom of the adjusting rod 508 is rotatably connected to the top of the second placement plate 506. One end of the tension sensor 511 is connected to one side of the bearing plate 503, so that one end of the power cable can be clamped and fixed quickly and conveniently. The distance between the third placement plate 507 and the second placement plate 506 can be adjusted by the adjusting rod 508, so that different power cables can be fixed.

[0025] The implementation principle of the power cable tensile testing device in this embodiment is as follows: When it is necessary to perform tensile testing on the power cable, the operator fixes both ends of the cable to the fixing mechanism 4 and the testing mechanism 5 respectively. At this time, the power cable can be stretched and tightened by moving the bearing plate 503. As the bearing plate 503 moves, it can drive the moving plate 321 to move. The movement of the moving plate 321 can squeeze the wedge block 310 to move. The movement of the wedge block 310 drives the connecting rod 311 to move. The movement of the connecting rod 311 drives the piston plate 312 to move in the piston box 31. 3. Internal sliding: The sliding of piston plate 312 compresses spring 314 and air inside piston box 313, allowing it to be transported to piston box 316 via air guide pipe 315. This enables piston plate 317 to slide inside piston box 316. The sliding of piston plate 317 moves piston rod 318, which in turn moves fixed plate 319. The movement of fixed plate 319 moves hollow tube 320, adjusting it to the side of striking plate 309. When the striking plate 309 rotates, it strikes the hollow tube 320. Simultaneously, the rotation of the threaded rod 502, via the belt 305, drives the worm gear 306 to rotate. The worm gear 306 then drives the worm wheel 307, which in turn drives the rotating rod 308. This rotation of the rotating rod 308, in turn, drives the striking plate 309 to rotate, causing it to strike the hollow tube 320 and produce sound. The sound from the hollow tube 320 is amplified by the loudspeaker 304, thus alerting the operator. Furthermore, the wedge block 31... There are three hollow tubes 300, arranged in a triangular pattern on the top of the mounting plate 301. When different cables are being tested, the position is set and the cable is pulled. Each time the cable passes through a wedge block 310, an audible alert is emitted, which alerts the operator when the power cable has been stretched a certain distance. There are also three hollow tubes 320, which are arranged in three sound boxes 303. The three hollow tubes 320 are of different lengths, which can produce different loud sounds, better reminding the operator to observe and thus better perform the stretching test. When tensile testing of power cables is required, the operator inserts one end of the power cable through the limiting plate 406 and simultaneously into the placement plate 409. Rotating the limiting rod 411 compresses the power cable, forcing it into the limiting hole inside the placement plate 409, thus clamping and securing it. Then, starting the motor 403 drives the rotating rod 404, which in turn rotates the rotating roller 405. The rotating roller 405 winds the power cable around the cable. When the power cable is wrapped, its length will shorten. The rotating roller 405 has a spiral groove, so the sliding rod 410 can move along the spiral groove. The movement of the sliding rod 410 can drive the placement plate 409 to move. The movement of the placement plate 409 can drive the sliding plate 408 to slide on the guide rod 407. Thus, when the power cable is wrapped and shortened, the wrapping and fixing of the power cable will not be affected. This can better fix the power cable and prevent it from falling and being damaged during stretching. It is more convenient for operators to use and improves work efficiency. When tensile testing of power cables is required, the operator secures one end of the power cable using the fixing mechanism 4, while the other end is inserted between placement plates 2 (506) and 3 (507). Rotating the limiting rod 2 (509) compresses the power cable and fixes it into the limiting hole 2. When different power cables need to be fixed, rotating the adjusting rod 508 moves placement plate 3 (507), adjusting the distance between placement plate 3 (507) and placement plate 2 (506), thus clamping and fixing different power cables and increasing its usability. When tensile testing is required, the operator starts... Motor 2 501 drives the threaded rod 502 to rotate, which in turn moves the bearing plate 503. The movement of the bearing plate 503 causes the telescopic rod 504 to extend and retract, thereby moving the power cable and detecting its tension. The telescopic rod 504 increases the stability of the bearing plate 503 during movement. When the bearing plate 503 moves, it pulls the tension sensor 511 installed on one side of the mounting plate 4 510 to extend and retract, thereby detecting the tension value. This allows the operator to observe and operate the cable, and the warning mechanism 3 emits an audible sound to better facilitate operation and observation.

Claims

1. A power cable tensile testing device, comprising a base plate (1) and supporting legs (2), characterized in that, A warning mechanism (3) is provided above the base plate (1). The warning mechanism (3) includes a mounting plate (301), a placement box (302), a sound box (303), a loudspeaker cover (304), and a belt (305). The bottom of the mounting plate (301) is connected to the top of the placement box (302), and the bottom of the mounting plate (301) is connected to the top of the sound box (303). The inner side of the mounting plate (301) is connected to the outer wall of the loudspeaker cover (304). The belt (305) is connected to a worm gear (306). A worm wheel (307) meshes with the outer wall of the worm gear (306). A rotating rod (308) is installed on the inner wall of the worm wheel (307). A striking plate (309) is installed on the outer wall of the rotating rod (308). The inner side of the mounting plate (301) slides... A wedge block (310) is dynamically connected. A connecting rod (311) is installed at the bottom of the wedge block (310). A piston plate (312) is installed at the bottom of the connecting rod (311). A piston box (313) is slidably connected to both ends of the piston plate (312). A gas guide pipe (315) is connected to one side of the piston box (313). A piston box (316) is connected to one end of the gas guide pipe (315). A piston plate (317) is slidably connected to the inner wall of the piston box (316). A piston rod (318) is installed on one side of the piston plate (317). A fixing plate (319) is installed at one end of the piston rod (318). A hollow tube (320) is installed inside the fixing plate (319). A movable plate (321) is slidably connected to the top of the mounting plate (301). A fixing mechanism (4) is provided above the base plate (1). The fixing mechanism (4) includes a connecting plate (401), a second mounting plate (402), a first motor (403), a second rotating rod (404), and a rotating roller (405). One side of the connecting plate (401) is connected to one end of the second mounting plate (402), one side of the second mounting plate (402) is connected to one end of the first motor (403), the output end of the first motor (403) is connected to one end of the second rotating rod (404), and the outer wall of the second rotating rod (404) is connected to the inner wall of the rotating roller (405).

2. The power cable tensile testing device according to claim 1, characterized in that, The outer wall of the rotating roller (405) is connected to the inner wall of the limiting plate (406). A guide rod (407) is installed on the top of the mounting plate (402). A sliding plate (408) is slidably connected to the outer wall of the guide rod (407). A placement plate (409) is installed at one end of the sliding plate (408). A sliding rod (410) is installed at the bottom of the placement plate (409). A limiting rod (411) is threadedly connected to the inner wall of the placement plate (409).

3. The power cable tensile testing device according to claim 1, characterized in that, A detection mechanism (5) is provided above the base plate (1). The detection mechanism (5) includes a second motor (501), a threaded rod (502), a support plate (503), a telescopic rod (504), and a third mounting plate (505). The output end of the second motor (501) is connected to one end of the threaded rod (502). The outer wall of the threaded rod (502) is threadedly connected to the inner wall of the support plate (503). One side of the support plate (503) is connected to one end of the telescopic rod (504), and the other side of the telescopic rod (504) is connected to the other end of the support plate (504). The end is connected to one side of the mounting plate three (505). The support plate (503) has a placement plate two (506) installed on one side. The support plate (503) has a placement plate three (507) installed on one side. The inner wall of the placement plate three (507) is threaded with an adjusting rod (508). The inner wall of the placement plate three (507) is threaded with a limit rod two (509). The bottom of the mounting plate two (402) has a mounting plate four (510). The mounting plate four (510) has a tension sensor (511) installed on one side.

4. The power cable tensile testing device according to claim 1, characterized in that, The number of the sound-emitting boxes (303) is three, and the sound-emitting boxes (303) are arranged in a triangular pattern inside the placement box (302). The number of the sound-amplifying covers (304) is three, and the sound-amplifying covers (304) are arranged in a triangular pattern inside the mounting plate (301), and are located above the sound-emitting boxes (303) and inside the placement box (302).

5. The power cable tensile testing device according to claim 1, characterized in that, The number of worm gears (307) is three, the number of wedge blocks (310) is three, the wedge blocks (310) are symmetrically distributed on the inner side of the mounting plate (301), a spring (314) is fixedly installed between the bottom of the piston plate (312) and the inner side of the piston box (313), and the bottom of the piston box (313) is fixedly connected to the inner wall of the placement box (302).

6. The power cable tensile testing device according to claim 1, characterized in that, The air duct (315) is Z-shaped. There are three hollow tubes (320). The hollow tubes (320) are symmetrically distributed on the inner walls of the three sound boxes (303). The three hollow tubes (320) are of different lengths, gradually becoming shorter from left to right. There are two moving plates (321). The moving plates (321) are symmetrically distributed on the bottom of the support plate (503).

7. The power cable tensile testing device according to claim 2, characterized in that, There are four connecting plates (401), which are symmetrically distributed on the top of the base plate (1). The outer wall of the rotating roller (405) is provided with a spiral groove. The bottom of the sliding rod (410) is slidably connected to the inner wall of the spiral groove. There are two guide rods (407), which are symmetrically distributed on the top of the second mounting plate (402). The guide rods (407) are L-shaped. A limit hole is provided on the inner side of the first placement plate (409).

8. The power cable tensile testing device according to claim 3, characterized in that, The outer wall of the threaded rod (502) is connected to the outer wall of the worm (306) via a belt (305). The bearing plate (503) is T-shaped. One end of the mounting plate (505) is fixedly connected to one side of the connecting plate (401).

9. The power cable tensile testing device according to claim 3, characterized in that, The second placement plate (506) and the third placement plate (507) are arc-shaped. The second placement plate (506) has a limit hole on its inner side. The bottom of the adjusting rod (508) is rotatably connected to the top of the second placement plate (506). One end of the tension sensor (511) is connected to one side of the bearing plate (503).

10. A power cable tensile testing device according to claim 1, characterized in that, The bottom of the base plate (1) is fixedly connected to the top of the support leg (2), the top of the base plate (1) is fixedly connected to the bottom of the placement box (302), the top of the base plate (1) is fixedly connected to the bottom of the connecting plate (401), and one end of the mounting plate (301) is fixedly connected to one end of the motor (501).

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