Intelligent detection device for power cable

Abstract

The invention relates to the field of power element detection, in particular to an intelligent detection device for a power cable, which comprises a base, a vertical frame and the like, the vertical frame is connected with a lifting assembly; the lifting assembly is provided with a translation assembly, and the translation assembly is provided with a clamping assembly used for clamping and fixing the two ends of a cable. The impact block freely falls to impact the cable, after the cable is impacted, the impacted part of the cable can be impacted on the pointed cone part of the conical block, the situation that the cable is placed on a rubble ground and smashed by an external stone and other objects is simulated, whether the sheath is damaged or not is tested, and therefore the impact resistance of the cable is tested while the impact resistance of the cable is tested. The puncture resistance test is synchronously carried out, the method is close to the actual use scene of the cable, and the test is more authentic.

Description

Technical Field

[0001] This invention relates to the field of power component testing, and more particularly to an intelligent testing device for power cables. Background Technology

[0002] For high-voltage and ultra-high-voltage transmission lines, new composite materials (copper-graphene, cross-linked polyethylene, carbon fiber, etc.) cables are often used. In order to cope with different external influences, the cables need to be tested for properties such as wear resistance, pressure resistance, and resistivity after production. Existing strength tests for cables, such as impact resistance, only subject the cables to repeated impacts. This cannot simulate situations where, for example, a cable is placed on the ground and hit by a stone or other object. In addition to the impact force, the gravel on the ground can easily cause damage to the cable sheath. Furthermore, the cable consists of an outer sheath and multiple internal cores, and the cores are also covered with a protective layer. Even if the outer sheath is damaged, the core protective layer can still provide protection and allow the cable to continue to be used. Existing impact testing devices cannot substantially test the strength performance of the core protective layer after the outer sheath is damaged. Summary of the Invention

[0003] To overcome the shortcomings of existing cable impact resistance tests, which only apply external force to the cable for compression, have a limited range of test items, and cannot simulate many influencing factors in the actual environment, this invention provides an intelligent testing device for power cables.

[0004] The technical solution of the present invention is as follows: an intelligent detection device for power cables, comprising a base and a stand connected to the base by bolts; a supporting boss for supporting the cable is fixedly connected to the base; it also includes an electric hoist, a mounting frame, a conical block, a limiting plate, a lifting assembly, a translation assembly, and a clamping assembly; an electric hoist is mounted on the stand; a lifting rope is wound around the electric hoist; an impact block for punching the cable is connected to the free end of the lifting rope; a lifting assembly is connected to the stand; a translation assembly is mounted on the lifting assembly, and a clamping assembly for clamping and fixing both ends of the cable is provided on the translation assembly; a mounting frame is connected to the supporting boss; a conical block for piercing the cable sheath is connected to the mounting frame; two limiting plates for limiting the falling position of the impact block are connected to the mounting frame.

[0005] As a preferred embodiment of the present invention, the lifting assembly includes: a vertical guide rail, a vertical electric slider, and a back plate; a plurality of vertical guide rails are mounted on the frame; a vertical electric slider is slidably connected to each vertical guide rail; all vertical electric sliders are fixedly connected to the back plate; and a translation assembly is located on the back plate.

[0006] As a preferred embodiment of the present invention, the translation component includes: a horizontal guide rail, a horizontal electric slider, and a mounting ring; the horizontal guide rail is mounted on the back plate; two horizontal electric sliders are slidably connected on the horizontal guide rail; a mounting ring is fixedly connected to each horizontal electric slider; and a clamping component is located on the mounting ring.

[0007] As a preferred embodiment of the present invention, the clamping assembly includes: a screw, a guide rod, and an arc-shaped clamp; a screw is threadedly connected to each mounting ring; several guide rods are slidably connected to each mounting ring; two arc-shaped clamps for clamping cables are installed on each mounting ring; one arc-shaped clamp on the mounting ring is rotatably connected to the corresponding screw and fixedly connected to the corresponding guide rod; the other arc-shaped clamp is fixedly connected to the mounting ring.

[0008] As a preferred embodiment of the present invention, it further includes a mounting block, a bidirectional electric push rod, and a positioning plate; the mounting frame is fixedly connected to two mounting blocks; each mounting block is equipped with a bidirectional electric push rod; each telescopic end of each bidirectional electric push rod is fixedly connected to a positioning plate for limiting the position of the cable; each limiting plate is fixedly connected to two opposing positioning plates on the two mounting blocks.

[0009] As a preferred embodiment of the present invention, it further includes an electric telescopic rod; the conical block is composed of two side blocks and a middle block; two electric telescopic rods are mounted on the mounting frame; each side block is fixedly connected to the telescopic end of an electric telescopic rod; a base plate is fixedly connected to the bottom of the middle block; the base plate is fixedly connected to the mounting frame.

[0010] As a preferred embodiment of the present invention, the side of the side block that faces away from the middle block is set as a rough surface.

[0011] As a preferred embodiment of the present invention, an anti-slip sleeve is fixedly attached to the end of the screw.

[0012] As a preferred embodiment of the present invention, a tension sensor is installed on the back plate, and the detection end of the tension sensor is connected to a horizontal electric slider.

[0013] As a preferred embodiment of the present invention, a connecting hole is provided on the supporting boss.

[0014] The present invention has the following advantages: The present invention realizes the impact of the cable by the free fall of the impact block. After the cable is impacted, the impacted part will hit the pointed part of the cone block, which simulates the situation of the cable being placed on the gravel ground and hit by external objects such as stones. This tests whether the outer sheath will be damaged. Thus, the impact resistance test of the cable is carried out at the same time as the puncture resistance test, which is close to the actual use scenario of the cable and the test is more realistic. By keeping a conical block embedded in the damaged area of ​​the outer sheath and causing the cable to move back and forth, the conical block hinders the cable's movement and tears the damaged area, testing whether the damaged area will be further expanded after the outer sheath is damaged. Alternatively, a new cable can be pressed onto the conical block, and the impact block maintains pressure on the cable while causing it to move back and forth, simulating the situation of the cable being dragged on a gravel surface, to determine the wear resistance of the outer sheath. This achieves the simulation of multiple test scenarios, significantly improving the comprehensiveness of the test. After the outer sheath is damaged, the two side blocks are used to pry open the damaged area of ​​the outer sheath to both sides, and the middle block directly contacts the wire core to puncture the wire core. This tests the durability and puncture resistance of the wire core after the outer sheath is damaged, and thus determines whether the cable can continue to be used even if the outer sheath is damaged. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the intelligent detection device for power cables according to the present invention; Figure 2 This is a side view of the present invention; Figure 3 This is a three-dimensional structural diagram of the mounting ring and clamping assembly of the present invention; Figure 4 This is a three-dimensional structural diagram of the base, mounting frame, conical block, mounting block, positioning plate, and limiting plate of the present invention; Figure 5 This is a schematic diagram of the mounting bracket and mounting block of the present invention separated from the supporting boss; Figure 6 This is a side view of the mounting bracket, conical block, mounting block, and positioning plate of the present invention.

[0016] Wherein: 1-base, 101-supporting boss, 102-connecting hole, 2-stand, 21-vertical guide rail, 22-vertical electric slider, 3-back plate, 31-horizontal guide rail, 32-horizontal electric slider, 4-mounting ring, 401-screw, 402-guide rod, 403-arc clamp, 5-electric hoist, 501-impact block, 6-mounting bracket, 61-electric telescopic rod, 7-conical block, 71-side block, 72-middle block, 73-base plate, 8-mounting block, 81-bidirectional electric push rod, 9-positioning plate, 10-limiting plate. Detailed Implementation

[0017] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0018] Example 1: As Figures 1-6 As shown, an intelligent detection device for power cables includes a base 1 and a support frame 2; the support frame 2 is bolted to the base 1; and a support boss 101 is fixedly connected to the base 1. It also includes an electric hoist 5, a mounting frame 6, a conical block 7, a limit plate 10, a lifting assembly, a translation assembly, and a clamping assembly; the electric hoist 5 is mounted on the upright frame 2; the electric hoist 5 is wound with a lifting rope; the free end of the lifting rope is connected to an impact block 501; the lifting assembly is connected to the upright frame 2, the translation assembly is connected to the lifting assembly, and the clamping assembly is connected to the translation assembly. Through the cooperation of the lifting assembly and the translation assembly, the clamping assembly and the clamped cable can be driven to lift and translate; the mounting frame 6 is connected to the supporting boss 101; the conical block 7 is connected to the mounting frame 6; and two limit plates 10 are connected to the mounting frame 6.

[0019] The lifting assembly includes: a vertical guide rail 21, a vertical electric slider 22, and a back plate 3; two vertical guide rails 21 are installed on the frame 2; a vertical electric slider 22 is slidably connected to each vertical guide rail 21; all vertical electric sliders 22 are fixedly connected to the back plate 3; the translation assembly is located on the back plate 3; the vertical electric slider 22 drives the back plate 3 to rise or fall along the vertical guide rail 21 to adjust the cable height, so that the cable is detached from or in contact with the conical block 7, and selectively puncture test is performed.

[0020] The translation assembly includes: a horizontal guide rail 31, a horizontal electric slider 32, and a mounting ring 4; the horizontal guide rail 31 is mounted on the back plate 3; two horizontal electric sliders 32 are slidably connected to the horizontal guide rail 31; a mounting ring 4 is fixedly attached to each horizontal electric slider 32; the clamping assembly is located on the mounting ring 4; the horizontal electric slider 32 drives the mounting ring 4 and the cable to translate along the horizontal guide rail 31, thereby changing the test position of the cable.

[0021] The clamping assembly includes: a screw 401, a guide rod 402, and an arc-shaped clamping piece 403; each mounting ring 4 is threadedly connected to a screw 401; each mounting ring 4 is slidably connected to two guide rods 402; each mounting ring 4 is symmetrically mounted with two arc-shaped clamping pieces 403; one arc-shaped clamping piece 403 on the mounting ring 4 is rotatably connected to the corresponding screw 401 and fixedly connected to the corresponding guide rod 402; the other arc-shaped clamping piece 403 is fixedly connected to the mounting ring 4.

[0022] It also includes mounting blocks 8, bidirectional electric push rods 81, and positioning plates 9; the mounting frame 6 is fixedly connected to two mounting blocks 8; each mounting block 8 is equipped with a bidirectional electric push rod 81; each telescopic end of each bidirectional electric push rod 81 is fixedly connected to a positioning plate 9; the cable is placed between the two positioning plates 9 connected by the same bidirectional electric push rod 81; each limiting plate 10 is fixedly connected to the two opposing positioning plates 9 on the two mounting blocks 8.

[0023] It also includes an electric telescopic rod 61; the conical block 7 is composed of two side blocks 71 on both sides and a middle block 72 in the middle; two electric telescopic rods 61 are symmetrically distributed on the mounting frame 6; each side block 71 is fixedly connected to the telescopic end of an electric telescopic rod 61; a base plate 73 is fixedly connected to the bottom of the middle block 72; the base plate 73 is fixedly connected to the mounting frame 6; after the conical block 7 is inserted into the cable sheath, the electric telescopic rod 61 drives the two side blocks 71 to move away from each other, separating the cable sheath, so that the middle block 72 can continue to insert into the cable core.

[0024] The side of the side block 71 facing away from the middle block 72 is made into a rough surface; this increases the friction when in contact with the cable sheath and prevents separation from the cable sheath.

[0025] An anti-slip sleeve is fixed to the end of the screw 401. The user holds the anti-slip sleeve and rotates the screw 401 to prevent slippage.

[0026] A tension sensor is installed on the back plate 3, and the detection end of the tension sensor is connected to a horizontal electric slider 32.

[0027] The cable testing steps of this invention are as follows: Before use, the user inserts both ends of the cable into an installation ring 4. Then, the user manually rotates the screw 401, causing it to push the arc-shaped clamp 403 to squeeze the cable ends. The movable arc-shaped clamp 403 clamps the cable ends onto the fixed arc-shaped clamp 403, thus securing both ends of the cable. The cable is then placed between two positioning plates 9 connected by the same bidirectional electric push rod 81 for positioning. At this point, the middle of the cable is positioned above the conical block 7 without contacting it. Next, the user selects an impact block 501 of the required weight for testing and hangs it at the end of the lifting rope of the electric hoist 5. The user then controls the electric hoist 5 to rewind the lifting rope, raising the impact block 501 to its highest point. Finally, the user releases the lifting rope via the electric hoist 5, allowing the impact block 501 to fall freely and impact the cable downwards for impact testing. Then, by testing whether the internal resistance of the cable deviates from the standard value, the impact resistance result of the cable can be obtained. Alternatively, the vertical electric slider 22 can be controlled to move the cable down along the vertical guide rail 21, so that the cable is close to the conical block 7. When the impact block 501 impacts the cable downward, the cable will be squeezed on the conical part of the conical block 7. After the impact, the user raises the impact block 501 again and controls the vertical electric slider 22 to move upward, moving the cable upward away from the conical block 7. Then, it is observed whether the lower outer sheath of the cable is punctured by the conical block 7. If it is not punctured, the impact block 501 is controlled to impact the cable multiple times. In this way, the cable sheath can be impacted and punctured at the same time. The durability of the cable sheath can be judged and evaluated based on the number of tests and the degree of damage to the cable sheath, and its actual durability index can be obtained.

[0028] After the cable sheath is punctured, the vertical electric slider 22 is controlled to move downward along the vertical guide rail 21, so that the conical block 7 remains pierced into the cable sheath. Then, the impact block 501 is lifted away from the cable. After that, the two horizontal electric sliders 32 are controlled to move synchronously to the left (or right), causing the entire cable to move horizontally. At this time, the conical block 7 piercing the sheath hinders the cable movement, causing the damaged area of ​​the sheath to be torn. During the process, the tension generated by the horizontal electric slider 32 is monitored by the tension sensor. When the tension value monitored by the tension sensor reaches the peak value and then drops sharply, it indicates that the cable sheath has been torn. This peak value is the ultimate tearing force that the cable sheath can withstand. Thus, the tear strength test of the damaged area of ​​the cable sheath is performed.

[0029] Alternatively, a new cable can be replaced, and the electric hoist 5 can be slowly lowered to press the impact block 501 onto the cable. At this time, the impact block 501 is limited by the limit plates 10 on both sides and does not fall off the cable. The weight of the impact block 501 presses the cable onto the conical block 7. Then, the horizontal electric slider 32 is controlled to drive the cable to move back and forth to the left and right. The cable sheath repeatedly rubs against the conical block 7 until the cable sheath is damaged. The cable is then dragged on gravel or other surfaces to obtain the wear resistance of the sheath.

[0030] Cables typically consist of multiple conductors. Figure 2 As shown, when the outer sheath is damaged but the core protective layer is not damaged, the cable can still be used normally. To further test the durability of the core protective layer after the outer sheath is damaged, after the outer sheath is damaged, the impact block 501 is kept pressing on the cable and the conical block 7 is kept inserted into the outer sheath. Then, the electric telescopic rod 61 is controlled to retract, and the two side blocks 71 move away from each other, pulling the damaged part of the outer sheath to both sides to expose the core. At the same time, the middle block 72 is aligned with the core. While the two side blocks 71 are pulling open the outer sheath, the friction between the rough surface of the side blocks 71 and the outer sheath will fix the cable and prevent it from moving upward and separating from the side blocks 71. Then, the impact block 501 is raised again and the cable is free-falling to impact it. The internal core will be pressed against the middle block 72. The middle block 72 performs a puncture test on the core, thereby testing the durability and puncture resistance of the core.

[0031] Based on the above steps, we can see that the present invention has the following effects: The cable is subjected to free fall impact by impact block 501. After being impacted, the cable will be squeezed onto the pointed part of cone block 7, simulating the situation where the cable is placed on a gravelly ground and hit by external objects such as stones. This tests whether the outer sheath will be damaged. Thus, the cable is subjected to impact resistance test and puncture resistance test at the same time, which is close to the actual use scenario of the cable and the test is more realistic.

[0032] By keeping the conical block 7 embedded at the damaged area of ​​the outer sheath, the cable is moved back and forth. The conical block 7 hinders the movement of the cable and tears at the damaged area of ​​the outer sheath, testing whether the damaged area will be further expanded after the outer sheath is damaged. Alternatively, a new cable is pressed on the conical block 7, and the impact block 501 maintains pressure on the cable while making the cable move back and forth, simulating the situation of the cable being dragged on a gravel ground, to obtain the wear resistance performance of the outer sheath. This realizes the simulation of multiple test scenarios and significantly improves the comprehensiveness of the test.

[0033] After the outer sheath is damaged, the two side blocks 71 are used to pry open the damaged area of ​​the outer sheath to both sides, and the middle block 72 directly contacts the wire core to puncture the wire core and test the durability and puncture resistance of the wire core after the outer sheath is damaged, so as to determine whether the cable can continue to be used even if the outer sheath is damaged.

[0034] Example 2: Based on Example 1, as follows Figures 3-6 As shown, a connecting hole 102 is provided on the supporting boss 101.

[0035] The operation steps for using this embodiment are as follows: After performing a puncture test on the wire core, to avoid needing to lift the cable each time to check the wire core condition, which affects efficiency, and to prevent the puncture position from shifting when the cable detaches from the conical block 7 and is lowered again, the present invention can be installed on the bracket by passing a bolt through the connecting hole 102 before use. This ensures that the height of the conical block 7 is higher than the user's normal operating line of sight. Therefore, after each puncture test on the wire core, there is no need to lift the cable, and the side block 71 keeps the cable sheath separated, allowing direct viewing of the lower side of the cable and the internal wire core condition. This improves operational efficiency and avoids the problem of the puncture position shifting when the cable detaches from the conical block 7 and is lowered again.

[0036] Although this disclosure has been described with respect to only a limited number of embodiments, those skilled in the art who benefit from this disclosure will understand that various other embodiments can be devised without departing from the scope of the invention. Therefore, the scope of the invention should be limited only by the appended claims.

Claims

1. An intelligent detection device for power cables, comprising a base (1) and a stand (2) bolted to the base (1); a support boss (101) for supporting cables is fixedly connected to the base (1); characterized in that: It also includes an electric hoist (5), a mounting frame (6), a conical block (7), a limiting plate (10), a lifting assembly, a translation assembly, and a clamping assembly; the electric hoist (5) is mounted on the upright frame (2); the electric hoist (5) has a lifting rope wound up; the free end of the lifting rope is connected to an impact block (501) for punching the cable; the lifting assembly is connected to the upright frame (2); the translation assembly is mounted on the lifting assembly, and the translation assembly is provided with a clamping assembly for clamping and fixing both ends of the cable; the mounting frame (6) is connected to the supporting boss (101); the conical block (7) for piercing the cable sheath is connected to the mounting frame (6); the mounting frame (6) has two limiting plates (10) for limiting the falling position of the impact block (501).

2. The intelligent detection device for power cables according to claim 1, characterized in that: The lifting assembly includes: vertical guide rails (21), vertical electric sliders (22) and back plate (3); several vertical guide rails (21) are installed on the frame (2); each vertical guide rail (21) is slidably connected to a vertical electric slider (22); all vertical electric sliders (22) are fixedly connected to the back plate (3); the translation assembly is located on the back plate (3).

3. The intelligent detection device for power cables according to claim 1, characterized in that: The translation assembly includes: a horizontal guide rail (31), a horizontal electric slider (32), and a mounting ring (4); the horizontal guide rail (31) is mounted on the back plate (3); two horizontal electric sliders (32) are slidably connected on the horizontal guide rail (31); a mounting ring (4) is fixedly attached to each horizontal electric slider (32); the clamping assembly is located on the mounting ring (4).

4. The intelligent detection device for power cables according to claim 1, characterized in that: The clamping assembly includes: a screw (401), a guide rod (402), and an arc-shaped clamp (403); each mounting ring (4) is threaded with a screw (401); each mounting ring (4) is slidably connected with several guide rods (402); each mounting ring (4) is equipped with two arc-shaped clamps (403) for clamping cables; one arc-shaped clamp (403) on the mounting ring (4) is rotatably connected to the corresponding screw (401) and fixedly connected to the corresponding guide rod (402); the other arc-shaped clamp (403) is fixedly connected to the mounting ring (4).

5. The intelligent detection device for power cables according to claim 4, characterized in that: It also includes mounting blocks (8), bidirectional electric push rods (81) and positioning plates (9); the mounting frame (6) is fixed to two mounting blocks (8); each mounting block (8) is equipped with a bidirectional electric push rod (81); each telescopic end of each bidirectional electric push rod (81) is fixed to a positioning plate (9) for limiting the position of the cable; each limiting plate (10) is fixed to two opposing positioning plates (9) on the two mounting blocks (8).

6. The intelligent detection device for power cables according to claim 5, characterized in that: It also includes an electric telescopic rod (61); the conical block (7) consists of two side blocks (71) and a middle block (72); two electric telescopic rods (61) are installed on the mounting frame (6); each side block (71) is fixedly connected to the telescopic end of an electric telescopic rod (61); a base plate (73) is fixedly connected to the bottom of the middle block (72); the base plate (73) is fixedly connected to the mounting frame (6).

7. The intelligent detection device for power cables according to claim 6, characterized in that: The side of the side block (71) facing away from the middle block (72) is set to a rough surface.

8. The intelligent detection device for power cables according to claim 4, characterized in that: An anti-slip sleeve is fixed to the end of the screw (401).

9. The intelligent detection device for power cables according to claim 8, characterized in that: A tension sensor is installed on the back plate (3), and the detection end of the tension sensor is connected to a horizontal electric slider (32).

10. An intelligent detection device for power cables according to any one of claims 1-9, characterized in that: A connecting hole (102) is provided on the supporting boss (101).

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