Device for nondestructive testing of power cable joint

Abstract

The utility model discloses a device for nondestructive testing of power cable joints, which relates to the technical field of cable detection and comprises an X-ray imaging machine, a cable, a support, a sliding plate and a pull rod, the inner side of the support is slidably connected with the sliding plate along the vertical direction, and the X-ray imaging machine is connected with the lower side of the sliding plate through a telescopic rod. The two sides of the sliding plate are both connected with pull rods, and the pull rods pull the cable upwards to enter the X-ray imaging machine. According to the utility model, the integrated operation of pulling up the cable joint, moving down the X-ray imaging machine and entering the X-ray imaging machine for imaging detection can be realized, the state of the cable joint is stable in the detection process, the detection accuracy of the cable joint is improved, the operation is simple and labor-saving, and the practicability is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable detection technical field, especially relate to a device for nondestructive testing of power cable joint. BACKGROUND

[0002] In the process of power cable installation, the joint position (and terminal head) of the power cable is the weakest link in the whole line and is most prone to failure. More than 70% of cable line failures occur at the joint and terminal. Currently, an X-ray digital imaging system is usually used to perform internal structure imaging detection on the cable joint position, which belongs to a nondestructive testing mode, to check whether the internal structure of the joint is loose or deformed.

[0003] The miniaturized X-ray machine for cable detection has the following imaging principle: mainly relying on the cold cathode X-ray tube carried thereby, the ray tube can emit high-intensity X-rays to penetrate the electric cable and thus capture internal defects and damages. Through a detector and image processing technology, the ray information is converted into intuitive and clear images for user analysis and judgment.

[0004] When detecting the cable joint on site, the cable is close to the trench ground, and it is difficult for the cable to enter the interior of the X-ray imaging machine for detection. Therefore, the cable needs to be manually lifted on both sides of the cable joint, and then the cable is pressed into the interior of the X-ray imaging machine. When lifting for detection, not only is the labor intensity large and the operation inconvenient, but also the stability of the cable is insufficient, which affects the detection accuracy. Therefore, a new detection device capable of realizing integrated detection operation is needed. UTILITY MODEL CONTENTS

[0005] The utility model provides a device for nondestructive testing of power cable joint in view of the above problems, which can realize integrated operation of pulling up the cable joint, moving down the X-ray imaging machine, and making the cable joint enter the X-ray imaging machine for imaging detection. During the detection of the cable joint, the state is stable, the detection accuracy is improved, the operation is simple and labor-saving, and the device has good practicality.

[0006] The technical scheme adopted to solve the above technical problems is as follows: a device for nondestructive testing of power cable joint, comprising an X-ray imaging machine, a cable, a support, a sliding plate, and a pull rod, the sliding plate is slidably connected to the inner side of the support in the vertical direction, the X-ray imaging machine is connected to the lower side of the sliding plate through an extension rod, pull rods are connected to both sides of the sliding plate, and the pull rods pull the cable upward into the interior of the X-ray imaging machine.

[0007] Further, a turntable, a lead screw, and a limiting rod are further included, the turntable is rotationally connected to the middle part of the support, the lower end of the lead screw is rotationally connected to the sliding plate, the lead screw penetrates the turntable, the lead screw is threadedly matched with the turntable, the lower end of the limiting rod is fixedly connected to the sliding plate, and the limiting rod is slidably penetrated through the turntable.

[0008] Further, it further includes a hook and a torsion spring, the upper end of the pull rod is rotationally connected with the sliding plate, the lower end of the pull rod is rotationally connected with the hook, the hook is used for hooking two sides of the cable joint, and the rotation shaft of the hook is connected with the torsion spring.

[0009] Further, it further includes a locking tooth ring, a clamping piece, a spring and a pressing screw rod, the locking tooth ring is coaxially fixedly connected with the upper side of the rotating table, the clamping piece is slidingly connected to the upper side of the support, the clamping piece is matched with the locking tooth ring, the spring is sleeved on the clamping piece, and the pressing screw rod is screwed on the upper side of the support and used for pressing the clamping piece.

[0010] Further, it further includes that the X-ray imaging machine is composed of an upper portion and a lower portion, the lower portion is slidingly connected with the upper portion through a guide rail, and the joint of the cable is located between the upper portion and the lower portion and is detected and imaged.

[0011] The X-ray imaging machine is composed of an upper portion and a lower portion, the lower portion is slidingly connected with the upper portion through a guide rail, and the joint of the cable is located between the upper portion and the lower portion and is detected and imaged. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a whole structure schematic view of the utility model.

[0013] Figure 2 It is a partial structure schematic view of the utility model.

[0014] Figure 3 It is a hook structure schematic view of the utility model.

[0015] Figure 4 It is a locking tooth ring position schematic view of the utility model.

[0016] Figure 5 It is a cable position schematic view of the utility model.

[0017] The drawings show that: 1, X-ray imaging machine; 2, cable; 3, support; 4, sliding plate; 5, pull rod; 6, rotating table; 7, lead screw; 8, limit rod; 9, hook; 10, torsion spring; 11, locking tooth ring; 12, clamping piece; 13, spring; 14, pressing screw rod; 15, upper portion; 16, lower portion. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0019] like Figures 1-5 As shown, this embodiment provides a non-destructive testing device for a power cable 2 joint, including an X-ray imaging machine 1, a cable 2, a bracket 3, a sliding plate 4, and a pull rod 5. The sliding plate 4 is slidably connected to the inner side of the bracket 3 in the vertical direction. The X-ray imaging machine 1 is connected to the lower side of the sliding plate 4 through a telescopic rod. Pull rods 5 are connected to both sides of the sliding plate 4. The pull rods 5 pull the cable 2 upward to enter the X-ray imaging machine 1.

[0020] In the above embodiments, by placing the bracket 3 in the groove of the cable 2, the sliding plate 4 slides downward, and the sliding plate 4 moves downward with the pull rod 5. When the lower end of the pull rod 5 is located on both sides of the cable 2 connector, the cable 2 is fixed on the pull rod 5. The sliding plate 4 moves upward with the pull rod 5, and at the same time pushes the X-ray imaging machine 1 downward, so that the cable 2 connector enters the interior of the X-ray imaging machine 1, and then the imaging operation is performed. The above components realize the integrated operation of pulling up the cable 2 connector, moving down the X-ray imaging machine 1, and the cable 2 connector entering the X-ray imaging machine 1 for imaging detection. During the detection process of the cable 2 connector, the state is stable, improving its detection accuracy. The operation is simple and labor-saving, and has good practicality.

[0021] Specifically, it also includes a turntable 6, a lead screw 7, and a limiting rod 8. The turntable 6 is rotatably connected to the middle of the bracket 3. The lower end of the lead screw 7 is rotatably connected to the sliding plate 4. The lead screw 7 passes through the turntable 6 and is threadedly engaged with the turntable 6. The lower end of the limiting rod 8 is fixedly connected to the sliding plate 4 and slides through the turntable 6.

[0022] In the above embodiments, the rotatable operation of the sliding plate 4 is achieved by the turntable 6, which makes the whole device easy to fold and carry, improving its practicality. The sliding plate 4 can move up and down by the cooperation of the rotating screw 7 and the limiting rod 8.

[0023] Specifically, it also includes a hook 9 and a torsion spring 10. The upper end of the pull rod 5 is rotatably connected to the sliding plate 4, and the lower end of the pull rod 5 is rotatably connected to the hook 9. The hook 9 is used to hook up both sides of the cable 2 connector, and the torsion spring 10 is connected to the rotating shaft of the hook 9.

[0024] In the above embodiments, the cable 2 is pulled up by the hook 9, which has good stability. The hook 9 is rotatably connected, which facilitates the insertion of the cables 2 on both sides. The torsion spring 10 facilitates the rotation and reset of the hook 9.

[0025] Specifically, it further comprises a locking tooth ring 11, a clamping piece 12, a spring 13 and a pressing screw 14, the locking tooth ring 11 is coaxially fixedly connected to the upper side of the rotating table 6, the clamping piece 12 is slidingly connected to the upper side of the support 3, the clamping piece 12 is matched with the locking tooth ring 11, the spring 13 is sleeved on the clamping piece 12, and the pressing screw 14 is screwed on the upper side of the support 3 and used for pressing the clamping piece 12.

[0026] In the above embodiment, when the rotating table 6 rotates, the clamping piece 12 repeatedly jumps on the locking tooth ring 11 through the spring 13, and a certain clamping force is provided for the locking tooth ring 11 and the rotating table 6; when the position adjustment of the rotating table 6 is completed, the clamping piece 12 is pressed by the pressing screw 14, and the locking operation of the rotating table 6 is realized.

[0027] Specifically, it further comprises: the X-ray imaging machine 1 is composed of an upper part 15 and a lower part 16, the lower part 16 is slidingly connected with the upper part 15 through a guide rail, and the joint of the cable 2 is detected and imaged between the upper part 15 and the lower part 16.

[0028] In the above embodiment, the X-ray tube is distributed in the X-ray imaging machine 1, and after the joint of the cable 2 is clamped and wrapped by the upper part 15 and the lower part 16, the X-ray imaging machine 1 images and detects the joint of the cable 2 in three directions, which is clear and is prior art.

[0029] The working principle of the utility model is as follows: when carrying, rotating the sliding plate 4, so that the sliding plate 4 is flush with the support 3, the sliding plate 4, the pull rod 5 and the X-ray imaging machine 1 and other components are rotated and folded in the inner side of the support 3, and the utility model is convenient to carry;

[0030] When the joint of the cable 2 is detected, the support 3 is placed on the ground in the groove of the cable 2, the pressing screw 14 is loosened, the sliding plate 4 is rotated to be parallel to the cable 2, in this process, the clamping piece 12 repeatedly jumps on the locking tooth ring, after rotation, the clamping piece 12 is locked by the rotating pressing screw, and then the rotating table 6 is locked and cannot rotate any more, so that the X-ray imaging machine 1 is above the joint of the cable 2, the sliding plate 4 is lowered under the cooperation of the screw rod 7 and the limiting rod 8, the pull rod 5 is lowered, the hook piece 9 is located at the position of the cable 2, the hook piece 9 and the pull rod 5 are rotated, the position of the hook piece 9 is adjusted, the cable 2 is clamped in the hook piece 9, then the screw rod 7 is reversed, the sliding plate 4 is moved upwards, the sliding plate 4 drives the pull rod 5, the hook piece 9 and the cable 2 to move upwards, the lower part 16 of the X-ray imaging machine 1 is slid, so that the lower part 16 is opened, the X-ray imaging machine 1 is pushed down, the telescopic rod is elongated, so that the joint of the cable 2 is pressed into the inside of the X-ray imaging machine 1, the lower part 16 is slid and closed, and then stable imaging detection can be carried out.

[0031] The above is only a preferred embodiment of the utility model, and is not used to limit the protection scope of the utility model.

Claims

1. An apparatus for non-destructive testing of power cable joints, comprising an X-ray imaging machine (1) and a cable (2), characterized in that, Also include: Support (3), the inner side is connected with sliding plate (4) in the vertical direction slidingly; The X-ray imaging machine (1) is connected with the lower side of the sliding plate (4) through the telescopic rod; Pull rod (5), the sliding plate (4) both sides are connected with pull rod (5), the pull rod (5) pulls up the cable (2) into the X-ray imaging machine (1) inside.

2. A device for non-destructive testing of power cable joints according to claim 1, characterized in that Also include: Rotary table (6), rotationally connected to the middle part of the support (3); Lead screw (7), the lower end is rotationally connected with the sliding plate (4), the lead screw (7) penetrates the rotary table (6), the lead screw (7) is in threaded cooperation with the rotary table (6); Limiting rod (8), the lower end is fixedly connected with the sliding plate (4), the limiting rod (8) is slidingly penetrated through the rotary table (6).

3. A device for non-destructive testing of power cable joints according to claim 1, characterized in that Also include: The upper end of the pull rod (5) is rotationally connected with the sliding plate (4); Hook piece (9), the lower end of the pull rod (5) is rotationally connected with hook piece (9), the hook piece (9) is used for hooking the both sides of the cable (2) joint; Torsion spring (10), the rotation shaft of the hook piece (9) is connected with torsion spring (10).

4. A device for non-destructive testing of power cable joints according to claim 2, characterized in that Also include: Locking tooth ring (11), coaxially fixedly connected with the upper side of the rotary table (6); Clamping piece (12), slidingly connected to the upper side of the support (3), the clamping piece (12) is matched with the locking tooth ring (11); Spring (13), the clamping piece (12) is provided with spring (13) on the sleeve; Resist the screw rod (14), is screwed on the upper side of the support (3), the resist the screw rod (14) is used for resisting the clamping piece (12).

5. A device for non-destructive testing of power cable joints according to claim 1, characterized in that Also include: The X-ray imaging machine (1) is composed of upper part (15) and lower part (16), the lower part (16) is slidingly connected with the upper part (15) through the guide rail, the joint of the cable (2) is located between the upper part (15) and the lower part (16) and is detected imaging.

Images