A special repair device for nuclear-grade cables

Abstract

This invention discloses a special repair device for nuclear-grade cables, comprising a set of upper and lower clamps, with the cable body housed inside each clamp. A repair mechanism and an auxiliary mechanism are arranged between the upper clamps, and a clamping mechanism is located within each clamp. The repair mechanism consists of a fixed block fixedly connected to the top of the upper clamps, and the fixed blocks are rotatably connected by a single one-way threaded rod. A pipeline connects the repair fluid storage tank to the repair area and the reinforcement area. This invention utilizes a micro-motor to drive the one-way threaded rod through the repair mechanism, causing the repair patch to move left and right between the upper clamps under the action of a first threaded sleeve. This allows the repair patch to precisely adhere to the damaged area of ​​the cable. Simultaneously, the repair area, with the assistance of multiple reinforcement areas, enhances the fixation of the repair fluid to the cable sheath after solidification, preventing the repair patch formed in a single repair area from warping after long-term use, resulting in poor repair performance.

Description

Technical Field

[0001] This invention relates to the field of cable repair technology, and in particular to a special repair device for nuclear-grade cables. Background Technology

[0002] Nuclear-grade cables are cables that can transmit power to the outside of the reactor containment shell and reactor building of a nuclear power plant. In terms of application, nuclear-grade cables are basically the same as those used in general thermal power plants, but their material composition and testing items are quite different. Currently, the insulation in China is mainly cross-linked polyolefin, and the sheath is mainly thermoplastic polyolefin. In the future, it may be necessary to increase the application ratio of ethylene propylene rubber insulation and cross-linked polyolefin sheath.

[0003] A search revealed Chinese patent CN107294014A, which discloses a low-voltage cable joint repair device and method. The device includes a repair shell, which comprises a repair cylinder open at both ends and two end caps detachably connected to both ends of the cylinder. The cylinder wall has injection holes, and each end cap has a cable passage opening. When the repair cylinder is connected to the end caps, it forms a cable passage cavity open at both ends and closed on the sides. The inner diameter of the cable passage cavity is larger than the outer diameter of the cable to be repaired. However, this patent has the following drawback: During cable repair, liquid repair adhesive is directly injected into the two cable joints without cleaning the insulation sheaths and inner metal wires at the joints. This can easily lead to dust remaining inside the liquid repair adhesive after it solidifies, preventing proper connection between the two cable joints. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a special repair device for nuclear-grade cables.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A nuclear-grade cable repair device includes an upper clamp and a lower clamp, with the cable body housed inside each clamp. A repair mechanism and an auxiliary mechanism are located between the upper clamps. A clamping mechanism is located inside each clamp. The repair mechanism consists of a fixed block fixedly connected to the top of the upper clamps. A single one-way threaded rod is rotatably connected between the fixed blocks. A first threaded sleeve is engaged with the outer wall of the one-way threaded rod. A first telescopic rod is fixedly connected to the bottom of the first threaded sleeve. A repair patch is fixedly connected to the bottom end of the first telescopic rod. One end of the one-way threaded rod extends out from one side of the fixed block and is fixedly connected to a micro motor. The bottom of the repair patch has a repair area and a reinforcement area. A repair fluid storage tank is located on the top of the repair patch. A pipeline connects the repair fluid storage tank to the repair area and the reinforcement area. The block is set in an arc shape, the repair area is set in an arc plate, and the reinforcement area is a long strip evenly distributed on both sides of the repair area. A hydraulic rod is set between the repair area, the reinforcement area and the repair block. The clamping mechanism is a set of upper clamps and a set of grooves opened in the inner wall of the lower clamps. The grooves are equipped with a first vertical clamping wheel, a second vertical clamping wheel and a set of horizontal clamping wheels. The first vertical clamping wheel and the second vertical clamping wheel are set with multiple circular plates arranged at equal intervals and fixedly connected to each other. The set of horizontal clamping wheels is set with multiple circular plates arranged at equal intervals and the number of circular plates is less than the number of circular plates below the first vertical clamping wheel and the second vertical clamping wheel. The circular plates of the first vertical clamping wheel, the second vertical clamping wheel and the set of horizontal clamping wheels are arranged alternately. A second telescopic rod is fixedly connected to one side of the first vertical clamping wheel. The other end of the set of second telescopic rods is fixedly connected to both sides of the repair block.

[0007] Preferably, the auxiliary mechanism is a scraper and brush set at the bottom of the repair patch. The scraper and brush are located on both sides of the repair area and the reinforcement area, respectively. Ventilation holes are evenly opened at the bottom of the repair patch. A heating tank is set at the top of the repair patch. Pipes are connected between the heating tank and multiple ventilation holes. A heating wire and a blower are set inside the heating tank.

[0008] Preferably, a first bidirectional threaded rod is rotatably connected to the inner wall of the bottom of the upper clamp, and a first slide rod and a second slide rod are engaged on the outer walls of both ends of the first bidirectional threaded rod. The other end of the first slide rod is fixedly connected to one side of the first vertical clamping wheel, and the other end of the second slide rod is engaged with one side of the second vertical clamping wheel. The top end of the first bidirectional threaded rod extends out of the top outer wall of the upper clamp and is fixedly connected to a first throttle handle.

[0009] Preferably, a third slide rod is fixedly connected to one side of each of the set of horizontal clamping wheels, and the other end of the set of third slide rods is respectively engaged with the outer walls of both ends of the second bidirectional threaded rod. One end of the second bidirectional threaded rod extends out of the outer wall of the upper clamp and is fixedly connected to a second throttle.

[0010] Preferably, a set of upper clamps are fixedly connected to the same second connecting rod, and a set of lower clamps are fixedly connected to the same first connecting rod.

[0011] Preferably, the outer walls of the upper clamp and the lower clamp are respectively fixedly connected to a second mounting plate and a first mounting plate, and the first mounting plate is rotatably connected to a mounting bolt, which engages with the second mounting plate.

[0012] The beneficial effects of this invention are as follows:

[0013] 1. Through the set repair mechanism, a micro motor drives the one-way threaded rod to rotate, so that the repair patch moves left and right between a set of upper clamps under the action of the first threaded sleeve, so that the repair patch can accurately fit the cable damage. At the same time, the set repair area, under the action of multiple reinforcement areas, enhances the fixation of the repair liquid to the cable sheath after solidification, and avoids the repair patch formed by a single repair area from curling up after long-term use, resulting in poor repair effect.

[0014] 2. Through the auxiliary mechanism, the cable insulation sheath or exposed metal inner wire is cleaned with scrapers and brushes to prevent dust from remaining inside after the liquid repair adhesive has solidified, which would prevent the repair block from properly connecting with the insulation sheath or the two metal inner wires. At the same time, the ventilation holes and heating tank allow the repair liquid to be dried with hot air after it adheres to the cable, which accelerates the solidification speed of the repair liquid and improves the repair quality.

[0015] 3. Through the clamping mechanism, the first bidirectional threaded rod drives the first slide rod and the second slide rod to move, so that the first vertical clamping wheel and the second vertical clamping wheel move up and down inside the upper clamp and the lower clamp to clamp the cable insulation sheath vertically. The second bidirectional threaded rod drives a set of third slide rods to move, so that a set of horizontal clamping wheels move left and right inside the upper clamp and the lower clamp to clamp the cable insulation sheath horizontally. This improves the fixation of the cable and makes the repair more precise. At the same time, the multiple equidistantly arranged circular plates can prevent the cable from being damaged during the clamping process, which is beneficial to the protection of the cable.

[0016] 4. The first and second mounting plates facilitate the opening of a set of upper clamps and a set of lower clamps, making operation simple and providing good fixation. At the same time, the mounting bolts are rotatably connected to the first mounting plate, ensuring that the mounting bolts and lower clamps will not separate when the set of upper clamps are opened, thus preventing the mounting bolts from detaching from the device and being lost. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a nuclear-grade cable repair device proposed in this invention;

[0018] Figure 2 This is a partial three-dimensional structural diagram of the repair patch of a nuclear-grade cable repair device proposed in this invention;

[0019] Figure 3This is a schematic diagram of the internal structure of the upper and lower clamps of a nuclear-grade cable repair device proposed in this invention;

[0020] Figure 4 This is a schematic diagram of the relaxed state structure of the clamping mechanism of a nuclear-grade cable repair device proposed in this invention;

[0021] Figure 5 This is a schematic diagram of the clamping mechanism of a nuclear-grade cable repair device proposed in this invention, showing the clamping state.

[0022] In the attached diagram: 1. Upper clamp; 2. Lower clamp; 3. Cable body; 4. Fixing block; 5. One-way threaded rod; 6. First threaded sleeve; 7. First telescopic rod; 8. Repair patch; 9. Micro motor; 10. Repair fluid storage tank; 11. Repair area; 12. Reinforcement area; 13. Scraper; 14. Brush; 15. Ventilation hole; 16. Heating tank; 17. Groove; 18. First vertical clamping wheel; 19. Second vertical clamping wheel; 20. Horizontal clamping wheel; 21. First double-way threaded rod; 22. First slide rod; 23. Second slide rod; 24. First throttle; 25. Third slide rod; 26. Second double-way threaded rod; 27. Second throttle; 28. Second telescopic rod; 29. ​​First connecting rod; 30. Second connecting rod; 31. First mounting plate; 32. Second mounting plate; 33. Mounting bolt. Detailed Implementation

[0023] The embodiments of this patent are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this patent, and should not be construed as limiting this patent. Example 1

[0024] Reference Figure 1-5A special repair device for nuclear-grade cables includes a set of upper clamps 1 and lower clamps 2. A cable body 3 is housed inside the upper clamps 1 and lower clamps 2. A repair mechanism and an auxiliary mechanism are arranged between the upper clamps 1. A clamping mechanism is arranged inside the upper clamps 1 and lower clamps 2. The repair mechanism consists of a fixed block 4 fixedly connected to the top of the upper clamps 1. A single one-way threaded rod 5 is rotatably connected between the fixed blocks 4. A first threaded sleeve 6 is engaged with the outer wall of the one-way threaded rod 5. A first telescopic rod 7 is fixedly connected to the bottom of the first threaded sleeve 6. A repair patch 8 is fixedly connected to the bottom end of the first telescopic rod 7. One end of the one-way threaded rod 5 extends out from one side of the fixed block 4 and is fixedly connected to a micro motor 9. A repair area 11 and a reinforcement area 12 are arranged at the bottom of the repair patch 8. A repair fluid storage tank 10 is arranged at the top of the repair patch 8. A pipe connection is provided between the repair fluid storage tank 10 and the repair area 11 and reinforcement area 12. The repair patch 8 is configured as... The repair area 11 is an arc-shaped plate, and the reinforcement area 12 is a long strip evenly distributed on both sides of the repair area 11. A hydraulic rod is provided between the repair area 11, the reinforcement area 12 and the repair patch 8. The clamping mechanism is a set of upper clamps 1 and lower clamps 2 with grooves 17 on their inner walls. The grooves 17 are provided with a first vertical clamping wheel 18, a second vertical clamping wheel 19 and a set of horizontal clamping wheels 20. The first vertical clamping wheel 18 and the second vertical clamping wheel 19 are arranged with multiple circular plates at equal intervals and fixedly connected to each other. The set of horizontal clamping wheels 20 is arranged with multiple circular plates at equal intervals and the number of circular plates is less than the number of circular plates below the first vertical clamping wheel 18 and the second vertical clamping wheel 19. The circular plates of the first vertical clamping wheel 18, the second vertical clamping wheel 19 and the set of horizontal clamping wheels 20 are arranged alternately. A second telescopic rod 28 is fixedly connected to one side of the first vertical clamping wheel 18. The other end of the set of second telescopic rods 28 is fixedly connected to both sides of the repair patch 8.

[0025] Meanwhile, the auxiliary mechanism consists of a scraper 13 and a brush 14 at the bottom of the repair patch 8. The scraper 13 and the brush 14 are located on both sides of the repair area 11 and the reinforcement area 12, respectively. Ventilation holes 15 are evenly opened at the bottom of the repair patch 8. A heating tank 16 is provided at the top of the repair patch 8. Pipes are connected between the heating tank 16 and multiple ventilation holes 15. A heating wire and a blower are provided inside the heating tank 16.

[0026] Meanwhile, a first bidirectional threaded rod 21 is rotatably connected to the inner wall of the bottom of the upper clamp 1. A first slide rod 22 and a second slide rod 23 are meshed on the outer walls of both ends of the first bidirectional threaded rod 21. The other end of the first slide rod 22 is fixedly connected to one side of the first vertical clamping wheel 18, and the other end of the second slide rod 23 is engaged with one side of the second vertical clamping wheel 19. The top of the first bidirectional threaded rod 21 extends out of the top outer wall of the upper clamp 1 and is fixedly connected to a first throttle 24. A third slide rod 25 is fixedly connected to one side of each of the horizontal clamping wheels 20. The other end of the third slide rod 25 is meshed with the outer walls of both ends of the second bidirectional threaded rod 26. One end of the second bidirectional threaded rod 26 extends out of one side of the outer wall of the upper clamp 1 and is fixedly connected to a second throttle 27. The same second connecting rod 30 is fixedly connected between the upper clamps 1 and the same first connecting rod 29 is fixedly connected between the lower clamps 2.

[0027] Meanwhile, the outer walls of the upper clamp 1 and the lower clamp 2 are respectively fixedly connected to the second mounting plate 32 and the first mounting plate 31. The first mounting plate 31 is rotatably connected to the inside of the first mounting plate 31, and the mounting bolt 33 is engaged with the second mounting plate 32.

[0028] Working principle: In use, tighten multiple mounting bolts 33 to separate them from a set of upper clamps 1, opening the set of upper clamps 1 and a set of lower clamps 2. Install one side of the upper clamps 1 and lower clamps 2 onto the damaged end of the cable, and the other side of the upper clamps 1 and lower clamps 2 onto the other damaged end of the cable, so that the damaged area is located in the gap between the set of upper clamps 1. Tighten the mounting bolts 33 in the opposite direction to fix the upper clamps 1 and lower clamps 2. Continue to rotate the first handle 24 to rotate the first bidirectional threaded rod 21, causing the first slide rod 22 and the second slide rod 23, which mesh with it, to move up and down in the groove 17, bringing the first vertical clamping wheel 18 and the second vertical clamping wheel 19 closer together and clamping the cable insulation layer. Continue to rotate the second handle 27 to rotate the second bidirectional threaded rod 26, causing the set of third slide rods 25, which mesh with it, to move left and right in the groove 17, bringing the set of horizontal clamping wheels 20 closer together and clamping the cable insulation layer. Both ends of the cable damaged area are clamped. After the initial cleaning is complete, the micro motor 9 is activated to rotate the one-way threaded rod 5, causing the repair patch 8 to move left and right between a set of upper clamps 1 under the drive of the first threaded sleeve 6. This allows the scraper 13 and brush 14 to clean the cable's insulation sheath or exposed metal wires, preventing dust from remaining inside after the liquid repair adhesive has solidified, which could prevent the repair patch from properly connecting with the insulation sheath or the two metal wires. After cleaning, when the repair patch 8 moves to the damaged area, the micro motor 9 is turned off, and the hydraulic rod is activated to make the repair area 11 and the reinforcement area 12 fit together at the damaged area. Repair is then performed using the repair fluid. After repair, the repair fluid is dried with hot air after it adheres to the cable using the ventilation hole 15 and the heating tank 16, which accelerates the solidification of the repair fluid and improves the repair quality. Then, the operator can rotate the first handle 24 and the second handle 27 to loosen the clamping mechanism, allowing the device to be moved along the outer wall of the same cable to continue repairing other damaged areas of the same cable.

[0029] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A special repair device for nuclear-grade cables, comprising a set of upper clamps (1) and lower clamps (2), wherein a cable body (3) is disposed inside the upper clamps (1) and lower clamps (2), a repair mechanism and an auxiliary mechanism are disposed between the set of upper clamps (1), and a clamping mechanism is disposed inside the upper clamps (1) and lower clamps (2), characterized in that, The repair mechanism consists of a set of upper clamps (1) with fixed blocks (4) fixedly connected to the top. The set of fixed blocks (4) are rotatably connected by the same one-way threaded rod (5). The outer wall of the one-way threaded rod (5) is meshed with a first threaded sleeve (6). The bottom of the first threaded sleeve (6) is fixedly connected to a first telescopic rod (7). The bottom end of the first telescopic rod (7) is fixedly connected to a repair patch (8). One end of the one-way threaded rod (5) extends out of the fixed block (4) and is fixedly connected to a micro motor (9). The bottom of the repair patch (8) is provided with a repair area (11) and a reinforcement area (12). The top of the repair patch (8) is provided with a repair fluid storage tank (10). The repair fluid storage tank (10) is connected to the repair area (11) and the reinforcement area (12) by a pipe. The repair patch (8) is set in an arc shape. The repair area (11) is set in an arc plate. The reinforcement area (12) is long and evenly distributed on both sides of the repair area (11). (11) A hydraulic rod is provided between the reinforcement area (12) and the repair patch (8). The clamping mechanism is a groove (17) opened on the inner wall of a set of upper clamps (1) and lower clamps (2). The groove (17) is provided with a first vertical clamping wheel (18), a second vertical clamping wheel (19) and a set of horizontal clamping wheels (20). The first vertical clamping wheel (18) and the second vertical clamping wheel (19) are arranged with multiple circular plates at equal intervals and fixedly connected to each other. The set of horizontal clamping wheels (20) is arranged with multiple circular plates at equal intervals and the number of circular plates is less than the number of circular plates lower than the first vertical clamping wheel (18) and the second vertical clamping wheel (19). The circular plates of the first vertical clamping wheel (18), the second vertical clamping wheel (19) and the set of horizontal clamping wheels (20) are arranged alternately. A second telescopic rod (28) is fixedly connected to one side of the first vertical clamping wheel (18). The other end of the set of second telescopic rods (28) is fixedly connected to both sides of the repair patch (8).

2. The nuclear-grade cable repair device according to claim 1, characterized in that, The auxiliary mechanism consists of a scraper (13) and a brush (14) at the bottom of the repair patch (8). The scraper (13) and the brush (14) are located on both sides of the repair area (11) and the reinforcement area (12), respectively. Ventilation holes (15) are evenly provided at the bottom of the repair patch (8). A heating tank (16) is provided at the top of the repair patch (8). Pipes are connected between the heating tank (16) and multiple ventilation holes (15). A heating wire and a blower are provided inside the heating tank (16).

3. The nuclear-grade cable repair device according to claim 1, characterized in that, The bottom inner wall of the upper clamp (1) is rotatably connected to a first bidirectional threaded rod (21). The outer walls of both ends of the first bidirectional threaded rod (21) are meshed with a first slide rod (22) and a second slide rod (23). The other end of the first slide rod (22) is fixedly connected to one side of the first vertical clamping wheel (18), and the other end of the second slide rod (23) is engaged with one side of the second vertical clamping wheel (19). The top end of the first bidirectional threaded rod (21) extends out of the top outer wall of the upper clamp (1) and is fixedly connected to a first throttle (24).

4. The nuclear-grade cable repair device according to claim 1, characterized in that, A third slide rod (25) is fixedly connected to one side of each of the horizontal clamping wheels (20). The other end of the third slide rod (25) is respectively engaged with the outer walls of both ends of the second bidirectional threaded rod (26). One end of the second bidirectional threaded rod (26) extends out of the outer wall of one side of the upper clamp (1) and is fixedly connected to the second throttle (27).

5. A nuclear-grade cable repair device according to claim 1, characterized in that, A set of upper clamps (1) are fixedly connected by the same second link (30), and a set of lower clamps (2) are fixedly connected by the same first link (29).

6. The nuclear-grade cable repair device according to claim 1, characterized in that, The upper clamp (1) and the lower clamp (2) are respectively fixedly connected to the outer walls of the second mounting plate (32) and the first mounting plate (31). The first mounting plate (31) is rotatably connected to the inside of the first mounting plate (31), and the mounting bolt (33) is engaged with the second mounting plate (32).

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