A cable for nuclear power plants and a multi-angle directional cable radiating device

Abstract

This invention discloses a nuclear power plant cable and a multi-angle directional cable radiation device, relating to the field of cable technology. The cable includes a cable body containing multiple stranded tin-plated copper conductors. Each stranded tin-plated copper conductor has, from the inside out, an irradiated cross-linked polyolefin inner insulation layer, an irradiated cross-linked halogen-free low-smoke flame-retardant polyolefin insulation layer, and a high-temperature and radiation-resistant polyimide tape. Each pair of stranded tin-plated copper conductors forms a sub-wire within the cable body. Each sub-wire has, from the inside out, a high-temperature resistant polyester tape, a tin-plated copper wire braided sub-shielding layer, and a marking tape. During use, the cable is pulled forward in a spiral manner. As the cable travels, each high-energy electron beam irradiates the cable at a constant speed and distance, providing comprehensive radiation treatment to the cable's outer surface without missing any areas, thus giving the cable more complete radiation resistance.

Description

Technical Field

[0001] This invention relates to the field of cable technology, specifically to a cable for nuclear power plants and a multi-angle directional cable radiating device. Background Technology

[0002] As one of the main structures for transmitting electrical energy, cables need to have corresponding characteristics depending on the place of use. For example, cables used in nuclear power plants have certain radiation levels, especially those connecting various equipment, which are most directly affected by radiation.

[0003] Therefore, cables used in nuclear power plants need to meet characteristics such as radiation resistance, flame retardancy, halogen-free and low smoke. In particular, radiation resistance is achieved by bombarding the insulation layer or protective sheath of the cable with a high-energy electron beam generated by an electron accelerator, breaking the polymer chains. Each broken point becomes a free radical. Free radicals are unstable and recombine with each other. After recombination, the original chain molecular structure becomes a three-dimensional network molecular structure, forming cross-links. This can improve the cable's current carrying capacity, insulation resistance, product quality temperature, and extend its service life.

[0004] When radiating cables, it is necessary to ensure that the high-energy electron beam bombards at a uniform angle and that no part of the cable is "missed". Otherwise, it will affect the stability characteristics of the cable itself after radiation. For example, if a part of the cable does not receive sufficient radiation and does not meet the standards for use in nuclear power plants, this part will be more susceptible to damage, resulting in greater damage.

[0005] In view of the above-mentioned technical problems, this application proposes a solution. Summary of the Invention

[0006] The purpose of this invention is to provide a nuclear power plant cable and a multi-angle directional cable radiation device to solve the problem that when nuclear power plant cables are irradiated, it is difficult to fully and evenly irradiate every outer surface position of the cable, resulting in the "missing" of a certain local position on the outer surface, making the local position more susceptible to damage, thereby causing the cable to suffer greater damage.

[0007] The objective of this invention can be achieved through the following technical solution: A cable for nuclear power plants, comprising a cable body, wherein multiple stranded tin-plated copper conductors are disposed within the cable body. Each stranded tin-plated copper conductor is sequentially bonded with an irradiated cross-linked polyolefin inner insulation layer, an irradiated cross-linked halogen-free low-smoke flame-retardant polyolefin insulation layer, and a high-temperature and radiation-resistant polyimide tape from the inside out. Each pair of stranded tin-plated copper conductors is configured as a sub-wire within the cable body. Each sub-wire is sequentially bonded with a high-temperature resistant polyester tape, a tin-plated copper wire braided sub-shielding layer, and an identification tape from the inside out. Each sub-wire is wrapped with a flame-retardant and high-temperature resistant filler rope. The flame-retardant and high-temperature resistant filler rope is sequentially bonded with a halogen-free low-smoke flame-retardant oxygen barrier layer, a tin-plated copper wire braided overall shielding layer, and an irradiated cross-linked halogen-free low-smoke flame-retardant polyolefin sheath. A radiation device is used during the production process of the cable body, the radiation device comprising a radiation tube, a transfer workbench, and a traction workbench.

[0008] A multi-angle directional cable radiation device for nuclear power plant cables, wherein the radiation tube, the transfer workbench and the traction workbench are arranged sequentially from left to right, the cable body passes through the center point of the radiation tube, and the cable body passes through the transfer workbench and the traction workbench respectively.

[0009] The radiating tube is equipped with a first-stage high-energy electron gun, a second-stage high-energy electron gun, a third-stage high-energy electron gun, and a fourth-stage high-energy electron gun, which are staggered at 90 degrees from each other. The first-stage high-energy electron gun is opposite to the second-stage high-energy electron gun, and the third-stage high-energy electron gun is opposite to the fourth-stage high-energy electron gun. Interface sleeves are rotatably connected to both ends of the radiating tube, and a pulley is installed at the middle of the radiating tube. Support sleeves are welded to the two interface sleeves, and a first-stage drive structure is provided on the support sleeve. The transmission end of the first-stage drive structure is connected to the pulley.

[0010] Further configuration: each of the radiation tubes is equipped with a positioning ring corresponding to the positions of the first-stage and second-stage high-energy electron guns, and the third-stage and fourth-stage high-energy electron guns; a power receiving feed ring is installed inside each of the two positioning rings; a power receiving pantograph is installed on the exterior of each of the first-stage, second-stage, third-stage, and fourth-stage high-energy electron guns; a power receiving end plate is installed at the center point of each power receiving pantograph; a high-voltage distribution box is installed below each of the two positioning rings; and each power receiving end plate, power receiving feed ring, and high-voltage distribution box are electrically connected.

[0011] The device is further configured such that: an inner shrinking ring is provided at the center point of the inner end of the radial tube, and connecting rods are welded evenly in a circular pattern on the outside of the inner shrinking ring, with the end of each connecting rod welded to the inner wall of the radial tube.

[0012] The method is further configured such that: four inner sliding grooves are provided on the inner wall of the radial tube, and guide rods parallel to the cable body are installed in the inner sliding grooves. Sliding blocks are slidably installed on two of the guide rods, and a top spring is provided on the outer circumference of the guide rods on the side of the sliding block closer to the transfer worktable.

[0013] A further configuration is provided: an inner clamping plate is provided on the outer wall position of each slider that is close to each other, and a multi-directional spring is installed between each inner clamping plate and the slider.

[0014] Further configuration: the portion of the cable body located on the transfer workbench is S-shaped, and a primary guide wheel and a secondary guide wheel are respectively installed at the two bends on the cable body. The primary and secondary guide wheels are rotatably connected to the transfer workbench. A primary gear and a secondary gear are respectively installed at the ends of the transmission shaft on the lower side of the transfer workbench. The primary and secondary gears do not mesh. A two-way movable spring frame is rotatably installed on the lower surface of the transfer workbench at the middle position between the primary and secondary gears. A one-way matching slot is opened at both ends of the two-way movable spring frame near the primary and secondary gears. The one-way matching slot meshes with the primary and secondary gears.

[0015] Further configured as follows: the upper surface of the transfer workbench is rotatably connected with multiple guide wheels in the vertically upward direction. The guide wheels are positioned at the corner and horizontal positions of the cable body. The two interface sleeves are rotatably installed with movable rings, and the two movable rings are also rotatably installed with guide wheels. The guide wheels located at the horizontal position of the cable body and those located inside the movable rings are symmetrically distributed along the cable body.

[0016] Further configuration: a take-up wheel and a secondary drive structure are provided at the end of the traction workbench, and a transverse groove is provided on the upper surface of the traction workbench. A sliding table is slidably installed inside the transverse groove. A threading ring is installed at the center point of the upper surface of the sliding table. An electric push cylinder is installed on one side of the traction workbench, and the output shaft of the electric push cylinder is fixedly connected to the sliding table.

[0017] The configuration is further defined as follows: when radiating the cable body using a radiation device, the first-stage high-energy electron gun, the second-stage high-energy electron gun, the third-stage high-energy electron gun, and the fourth-stage high-energy electron gun rotate in a directional circular motion during the rotation of the radiation tube. The cable body moves horizontally at a uniform speed from left to right. The first-stage high-energy electron gun, the second-stage high-energy electron gun, the third-stage high-energy electron gun, and the fourth-stage high-energy electron gun form irradiation zone one, irradiation zone two, irradiation zone three, and irradiation zone four on the cable body, respectively. The trajectories of irradiation zone one, irradiation zone two, irradiation zone three, and irradiation zone four are spiral-shaped, and the intervals between irradiation zone one, irradiation zone two, irradiation zone three, and irradiation zone four are equal.

[0018] The present invention has the following beneficial effects:

[0019] 1. The overall cable is used in places with high radiation, such as nuclear power plants. Therefore, the outer protective layer structure of the cable is mainly composed of radiation cross-linked polyolefin inner insulation layer, radiation cross-linked halogen-free low-smoke flame-retardant polyolefin insulation layer, high temperature and radiation resistant polyimide tape, high temperature resistant polyester tape, and tin-plated copper wire braided sub-shielding layer. The above protective layer structure is bombarded with high-energy electron beams to break the polymer chains of the protective layer. Each broken point becomes a free radical. Free radicals are unstable and recombine with each other. After recombination, the original chain molecular structure becomes a three-dimensional network molecular structure and forms cross-links, giving the overall cable body a more superior performance.

[0020] 2. In the process of using this invention, four high-energy electron guns are used to radiate the outside of the cable body. In this state, the cable body moves at a constant speed along the horizontal direction, while each high-energy electron gun can rotate in a direction. That is to say, the trajectory of the high-energy electron gun irradiating the cable body is spiral. So when the cable moves horizontally, each high-energy electron gun can irradiate the outer curved surface of the cable body evenly, without any radiation dead angles, so that the cable body has complete radiation resistance after receiving radiation.

[0021] 3. In addition, when the cable body is pulled, the cable body at the transfer workbench acts as a tension collection structure, while the cable body located in the radial tube is always in a relatively taut state under the action of each inner clamp. That is to say, the cable located inside the radial tube is in a relatively horizontal state, making it easier to receive radiation.

[0022] 4. Based on the above, the cable body is pulled by the primary guide wheel and the secondary guide wheel at the transfer workbench. When the primary guide wheel and the secondary guide wheel rotate, they will also drive their respective primary gear and secondary gear to rotate. The primary gear and the secondary gear rotate in opposite directions. With the help of the two-way movable spring frame, when the primary gear and the secondary gear stop moving, the two-way movable spring frame can quickly lock the primary gear and the secondary gear, thereby preserving the tension of the cable body under the action of traction force. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of a cable structure for a nuclear power plant proposed in this invention;

[0025] Figure 2 This is a schematic diagram of the structure of a multi-angle directional cable radiation device for nuclear power plants proposed in this invention;

[0026] Figure 3 This is a schematic diagram of the radiating tube component in a multi-angle directional cable radiating device for nuclear power plants proposed in this invention;

[0027] Figure 4 This is a cross-sectional view of the positioning ring component of a multi-angle directional cable radiation device for nuclear power plants proposed in this invention;

[0028] Figure 5 This invention relates to a multi-angle directional cable radiating device for nuclear power plant cables. Figure 3 A cross-sectional and dissected diagram;

[0029] Figure 6 This is a schematic diagram of the transfer workbench component in a multi-angle directional cable radiation device for nuclear power plants proposed in this invention.

[0030] Figure 7 This is a top view of the transfer workbench component in a multi-angle directional cable radiating device for nuclear power plants proposed in this invention.

[0031] Figure 8 This is a schematic diagram of the traction workbench component of a multi-angle directional cable radiation device for nuclear power plants proposed in this invention;

[0032] Figure 9This is a partial guide view of a cable for a nuclear power plant proposed in this invention.

[0033] In the diagram: 1. Stranded tin-plated copper conductor; 2. Irradiated cross-linked polyolefin inner insulation layer; 3. Irradiated cross-linked halogen-free, low-smoke, flame-retardant polyolefin insulation layer; 4. High-temperature and radiation-resistant polyimide tape; 5. High-temperature resistant polyester tape; 6. Tin-plated copper wire braided sub-shielding layer; 7. Flame-retardant and high-temperature resistant filler rope; 8. Halogen-free, low-smoke, flame-retardant, oxygen-barrier layer; 9. Tin-plated copper wire braided overall shielding layer; 10. Irradiated cross-linked halogen-free, low-smoke, flame-retardant polyolefin sheath; 11. Identification tape; 12. Interface sleeve; 1201. Movable ring; 1202. Guide wheel; 13. Support sleeve; 14. Positioning ring; 1401. Power receiving and feeding ring; 15. First-stage drive structure; 1501. Pulley; 16. High-voltage distribution box; 17. Transfer workbench; 1701. First-stage guide wheel; 1702. Second-stage guide wheel; 1703. First-stage... Gear; 1704, Secondary gear; 1705, One-way positioning slot; 1706, Two-way movable spring frame; 18, Traction worktable; 1801, Transverse slide groove; 1802, Threading ring; 1803, Sliding table; 1804, Electric push cylinder; 19, Take-up reel; 20, Secondary drive structure; 21, Radial threading cylinder; 2101, Primary high-energy electron gun; 2102, Secondary high-energy electron gun; 2103, Tertiary high-energy electron gun; 2104, Quaternary high-energy electron gun; 2105, Pantograph frame; 2106, Power receiving end seat; 22, Connecting rod; 23, Inner slide groove; 2301, Top position spring; 2302, Slider; 2303, Guide rod; 2304, Inner shrinking ring sleeve; 2305, Multi-directional spring; 2306, Inner clamping plate; 24, Cable body. Detailed Implementation

[0034] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Reference Figure 1A cable for nuclear power plants includes a cable body 24. The cable body 24 contains multiple stranded tin-plated copper conductors 1. Each stranded tin-plated copper conductor 1 is sequentially bonded with an irradiated cross-linked polyolefin inner insulation layer 2, an irradiated cross-linked halogen-free low-smoke flame-retardant polyolefin insulation layer 3, and a high-temperature resistant and radiation-resistant polyimide tape 4 from the inside out. Each pair of stranded tin-plated copper conductors 1 serves as a sub-wire within the cable body 24. Each sub-wire is sequentially bonded with a high-temperature resistant polyester tape 5, a tin-plated copper wire braided sub-shielding layer 6, and an identification tape 11 from the inside out. Each sub-wire is also wrapped with a flame-retardant and high-temperature resistant filler rope 7. The flame-retardant and high-temperature resistant filler rope 7 is sequentially bonded with a halogen-free low-smoke flame-retardant oxygen barrier layer 8, a tin-plated copper wire braided overall shielding layer 9, and an irradiated cross-linked halogen-free low-smoke flame-retardant polyolefin sheath 10. During the production process, the cable body 24 utilizes a radiation device, which includes a radiation tube 21, a transfer workbench 17, and a traction workbench 18.

[0036] Working principle: The principle of the radiant cable is as follows: a high-energy electron beam generated by an electron accelerator is used to bombard the insulation layer and sheath, breaking the polymer chains. Each broken point becomes a free radical. Free radicals are unstable and need to recombine with each other. After recombination, the original chain molecular structure becomes a three-dimensional network molecular structure and forms cross-links, giving the overall cable body 24 a better performance. This will not be elaborated on here.

[0037] Example 1

[0038] Currently, when radiating cables, the cables move at a constant speed in the horizontal direction, while a high-energy electron beam generated by an electron accelerator irradiates a specific area of ​​the cable vertically. In this process, it can be understood that the high-energy electron beam only acts on a single area, meaning that a localized section of the cable itself is not radiated, resulting in localized defects. Comparatively, the performance at this point is lower, making it more susceptible to damage. Damage to a specific area of ​​the cable directly expands the damaged area. Therefore, the following technical solution is proposed:

[0039] Reference Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 9 The radial tube 21, the transfer workbench 17 and the traction workbench 18 are arranged sequentially from left to right. The cable body 24 passes through the center point of the radial tube 21 and passes through the transfer workbench 17 and the traction workbench 18 respectively.

[0040] The radiation tube 21 is equipped with a primary high-energy electron gun 2101, a secondary high-energy electron gun 2102, a tertiary high-energy electron gun 2103, and a quaternary high-energy electron gun 2104, respectively. These four high-energy electron guns are staggered at 90-degree angles to each other, with the primary high-energy electron gun 2101 and secondary high-energy electron gun 2102, and the tertiary high-energy electron gun 2103 and quaternary high-energy electron gun 2104 facing each other. The two ends of the radiation tube 21... A rotatable interface sleeve 12 is connected to the radial tube 21, and a pulley 1501 is installed at the middle position of the radial tube 21. Support sleeves 13 are welded to the two interface sleeves 12. A primary drive structure 15 is provided on the support sleeve 13, and the transmission end of the primary drive structure 15 is connected to the pulley 1501. Positioning rings 14 are provided on the radial tube 21 at positions corresponding to the primary high-energy electron gun 2101 and the secondary high-energy electron gun 2102, and the tertiary high-energy electron gun 2103 and the quaternary high-energy electron gun 2104. A power receiving feed ring 1401 is installed inside the two positioning rings 14. Each of the energy electron gun 2101, the secondary high-energy electron gun 2102, the tertiary high-energy electron gun 2103, and the quaternary high-energy electron gun 2104 is equipped with a pantograph 2105 on its external position. A power receiving end bracket 2106 is installed at the center point of each pantograph 2105. A high-voltage distribution box 16 is installed below the two positioning rings 14. Each power receiving end bracket 2106, power receiving ring 1401, and high-voltage distribution box 16 are electrically connected. An inner shrinking ring 2304 is provided at the center point of the inner end of the radiating tube 21. The outer surface of the inner shrinking ring 2304 is circular. Evenly distributed connecting rods 22 are welded, with the end of each connecting rod 22 welded to the inner wall of the radial tube 21. A take-up wheel 19 and a secondary drive structure 20 are provided at the end of the traction worktable 18. A transverse sliding groove 1801 is provided on the upper surface of the traction worktable 18. A sliding table 1803 is slidably installed inside the transverse sliding groove 1801. A threading ring 1802 is installed at the center point of the upper surface of the sliding table 1803. An electric push cylinder 1804 is installed on one side of the traction worktable 18. The output shaft of the electric push cylinder 1804 is fixedly connected to the sliding table 1803.

[0041] When the cable body 24 is radiated using a radiation device, the first-stage high-energy electron gun 2101, the second-stage high-energy electron gun 2102, the third-stage high-energy electron gun 2103, and the fourth-stage high-energy electron gun 2104 rotate in a directional ring as the radiation tube 21 rotates. The cable body 24 moves horizontally at a constant speed from left to right. The first-stage high-energy electron gun 2101, the second-stage high-energy electron gun 2102, the third-stage high-energy electron gun 2103, and the fourth-stage high-energy electron gun 2104 form irradiation zone 1, irradiation zone 22, irradiation zone 3, and irradiation zone 4 on the cable body 24, respectively. The trajectories of the irradiation zone 1, irradiation zone 22, irradiation zone 3, and irradiation zone 4 are spiral-shaped, and the intervals between the irradiation zone 1, irradiation zone 22, irradiation zone 3, and irradiation zone 4 are equal.

[0042] Working principle: The cable body 24 is passed through the radial tube 21 in sequence, and finally connected to the traction workbench 18 after passing through the transfer workbench 17. Under the action of the take-up wheel 19 and the secondary drive structure 20 on the traction workbench 18, the cable body 24 moves horizontally at a constant speed from left to right.

[0043] At this time, the positions of the first-stage high-energy electron gun 2101, the second-stage high-energy electron gun 2102, the third-stage high-energy electron gun 2103, and the fourth-stage high-energy electron gun 2104 relative to the radiation tube 21 remain relatively unchanged. However, the radiation tube 21 rotates at a constant speed under the action of the pulley 1501 and the first-stage drive structure 15. Therefore, the area irradiated by the first-stage high-energy electron gun 2101, the second-stage high-energy electron gun 2102, the third-stage high-energy electron gun 2103, and the fourth-stage high-energy electron gun 2104 on the outer surface of the cable body 24 presents a spiral shape. Further restrictions are placed on the positions of the first-stage high-energy electron gun 2101, the second-stage high-energy electron gun 2102, the third-stage high-energy electron gun 2103, and the fourth-stage high-energy electron gun 2104. The first-stage high-energy electron gun 2101, the second-stage high-energy electron gun 2102, the third-stage high-energy electron gun 2103, and the fourth-stage high-energy electron gun 2104 are staggered at a 90-degree angle. Therefore, the first, second, third, and fourth irradiation zones formed will completely cover the outer surface of the cable body 24, and there will be no radiation dead zones.

[0044] Example 2

[0045] In Example 1, the cable body maintains horizontal movement, meaning the cable body requires traction in one direction. The simplest method currently is to bind the processed cable to a structure such as a take-up reel. As the take-up reel rotates, the cable slowly winds around it, thus providing slow traction. However, it's important to note that if the equipment is temporarily stopped during operation, the cable loses traction and will spring back under the reaction force, meaning it cannot maintain a horizontal position. Therefore, when the equipment is restarted, localized defects will still exist on the cable. To address this, the following technical solution is proposed:

[0046] Reference Figure 2 , Figure 6 , Figure 7 and Figure 8 The inner wall of the radial tube 21 is provided with four inner sliding grooves 23. Guide rods 2303 parallel to the cable body 24 are installed in the inner sliding grooves 23. Sliding blocks 2302 are slidably mounted on two of the guide rods 2303. A top spring 2301 is provided on the outer circumference of the guide rod 2303 near the transfer worktable 17. An inner clamping plate 2306 is provided on the outer wall of each sliding block 2302 on the side closest to each other. Each inner clamping plate 2306 is connected to the sliding block 2302. A multi-directional spring 2305 is installed between 02. The portion of the cable body 24 located on the transfer workbench 17 is S-shaped, and a primary guide wheel 1701 and a secondary guide wheel 1702 are respectively installed at two bends on the cable body 24. The primary guide wheel 1701 and the secondary guide wheel 1702 are rotatably connected to the transfer workbench 17. A primary gear 1703 and a secondary gear 1702 are respectively installed at the end of the drive shaft on the lower side of the transfer workbench 17. 4. The primary gear 1703 and the secondary gear 1704 do not mesh. A two-way movable spring 1706 is rotatably mounted on the lower surface of the intermediate worktable 17, located between the primary gear 1703 and the secondary gear 1704. One-way positioning grooves 1705 are provided on both ends of the two-way movable spring 1706 near the primary gear 1703 and the secondary gear 1704. These one-way positioning grooves 1705 mesh with the primary gear 1703 and the secondary gear 1704. Multiple guide wheels 1202 are rotatably connected to the upper surface of the rotary table 17 in a vertically upward direction. The guide wheels 1202 are positioned at the corners and horizontal positions of the cable body 24. Movable rings 1201 are rotatably installed inside the two interface sleeves 12, and guide wheels 1202 are also rotatably installed inside the two movable rings 1201. The guide wheels 1202 located at the horizontal position of the cable body 24 and inside the movable rings 1201 are symmetrically distributed along the cable body 24.

[0047] Working principle: Before proceeding with Example 1, the first step is to insert the cable body 24 as follows:

[0048] Part 1: Insert the cable body 24 into the middle position of the two guide wheels 1202 inside one of the interface sleeves 12, and clamp it in the middle position of the two sets of inner clamping plates 2306 in sequence. At this time, the cable body 24 also needs to pass through the inner shrinking ring sleeve 2304.

[0049] Part Two: Subsequently, the cable body 24 is inserted from another interface sleeve 12, passes through the guide wheel 1202, the first-level guide wheel 1701 and the second-level guide wheel 1702 on the transfer workbench 17 in sequence, and finally passes through the cable threading ring 1802 and is tied to the take-up wheel 19.

[0050] In summary, as the take-up reel 19 rotates, the cable body 24 slowly winds around the take-up reel 19. At this time, the cable body 24 is pulled, and the cable body 24 is clamped and fixed in the radial tube 21 by two sets of inner clamping plates 2306, and is stabilized by the guide wheel 1201 inside the movable ring 1201. The cable body 24 tends to be in a relatively horizontal state in the radial tube 21.

[0051] The above-mentioned state only applies when the cable body 24 is pulled by the traction workbench 18, and the cable body 24 has a certain tension. If it is necessary to temporarily stop the equipment operation, that is, if the secondary drive structure 20 is not started, the cable body 24 will lose traction and retract, meaning that the cable body 24 will not tend to be horizontal. Therefore, the following solution is proposed:

[0052] Step 1: When the secondary drive structure 20 starts normally, the primary gear 1703 rotates clockwise and the secondary gear 1704 rotates counterclockwise. The corresponding two-way movable spring 1706 rotates freely in accordance with the rotation direction of the primary gear 1703 and the secondary gear 1704. For example, under normal start-up, the two-way movable spring 1706 reciprocates around its central rotation point. Because the two-way movable spring 1706 has a certain elastic potential energy, in this state, the two-way movable spring 1706 will not interfere with the rotation of the primary gear 1703 and the secondary gear 1704.

[0053] Step 2: When the secondary drive structure 20 stops running, the primary gear 1703 or the secondary gear 1704 rotates in opposite directions under the action of the retraction force. At this time, the corresponding two-way movable spring 1706 will momentarily lock the primary gear 1703 and the secondary gear 1704, keeping the rotation of the primary gear 1703 and the secondary gear 1704 stationary. When restarting, gently move the two-way movable spring 1706 to move it away from the primary gear 1703 and the secondary gear 1704.

[0054] The above process maintains the stability of the cable body 24 at the transfer worktable 17. In the radial tube 21, the cable body 24 is held by two sets of inner clamping plates 2306. At this time, the sliders 2302 on the two sets of inner clamping plates 2306 can move. For example, when the cable body 24 moves normally, one set of sliders 2302 moves towards the transfer worktable 17, and the top spring 2301 at that position is compressed.

[0055] When the cable body 24 loses its traction, the rebound force of the top spring 2301 can straighten the cable body inside the radial tube 21, ensuring that the cable body 24 remains straight when restarted.

[0056] In summary, this invention employs four high-energy electron guns to radiate the exterior of the cable body. In this state, the cable body moves at a constant speed along the horizontal direction, while each high-energy electron gun can rotate in a specific direction. That is to say, the trajectory of the high-energy electron gun irradiating the cable body is spiral-shaped. Therefore, when the cable moves horizontally, each high-energy electron gun can evenly irradiate the outer curved surface of the cable body, eliminating radiation dead zones and enabling the cable body to have complete radiation resistance after receiving radiation.

Claims

1. A multi-angle directional cable radiation device for nuclear power plant cables, comprising a cable body (24), characterized in that, The cable body (24) will use a radiation device during the production process. The radiation device includes a radiation tube (21), a transfer workbench (17) and a traction workbench (18). The radiation tube (21) is equipped with a first-stage high-energy electron gun (2101), a second-stage high-energy electron gun (2102), a third-stage high-energy electron gun (2103), and a fourth-stage high-energy electron gun (2104). Positioning rings (14) are provided on the radiation tube (21) at the positions corresponding to the first-stage high-energy electron gun (2101) and the second-stage high-energy electron gun (2102), the third-stage high-energy electron gun (2103), and the fourth-stage high-energy electron gun (2104). An inner shrinking ring (2304) is provided at the center point of the inner end of the radial tube (21). Connecting rods (22) are welded evenly in a circular pattern on the outside of the inner shrinking ring (2304). The end of each connecting rod (22) is welded to the inner wall of the radial tube (21). The radial tube (21), the transfer workbench (17) and the traction workbench (18) are arranged sequentially from left to right. The cable body (24) passes through the center point of the radial tube (21) and passes through the transfer workbench (17) and the traction workbench (18) respectively. The primary high-energy electron gun (2101), secondary high-energy electron gun (2102), tertiary high-energy electron gun (2103), and quaternary high-energy electron gun (2104) are staggered at 90 degrees to each other. The primary high-energy electron gun (2101) and secondary high-energy electron gun (2102), and the tertiary high-energy electron gun (2103) and quaternary high-energy electron gun (2104) are arranged opposite each other. Interface sleeves (12) are rotatably connected to both ends of the radiation tube (21), and a pulley (1501) is installed at the middle of the radiation tube (21). The two interface sleeves (12) are... A support sleeve (13) is welded on the support sleeve (13), and a first-stage drive structure (15) is provided on the support sleeve (13). The transmission end of the first-stage drive structure (15) is connected to the pulley (1501). Four inner grooves (23) are provided on the inner wall of the radial tube (21). Guide rods (2303) parallel to the cable body (24) are installed in the inner grooves (23). Sliding blocks (2302) are slidably installed on two of the guide rods (2303). A top spring (2301) is provided on the outer circumference of the guide rod (2303) on the side of the slider (2302) near the transfer worktable (17). The portion of the cable body (24) located on the transfer workbench (17) is S-shaped, and a primary guide wheel (1701) and a secondary guide wheel (1702) are respectively installed at two bends on the cable body (24). The primary guide wheel (1701) and the secondary guide wheel (1702) are rotatably connected to the transfer workbench (17), and a primary gear (1703) and a secondary gear (1704) are respectively installed at the end of the drive shaft on the lower side of the transfer workbench (17). The gear (1703) and the secondary gear (1704) do not mesh. The lower surface of the transfer worktable (17) is rotatably mounted with a two-way movable spring frame (1706) located in the middle position between the primary gear (1703) and the secondary gear (1704). The two-way movable spring frame (1706) is provided with a one-way matching slot (1705) at both ends near the primary gear (1703) and the secondary gear (1704). The one-way matching slot (1705) meshes with the primary gear (1703) and the secondary gear (1704).

2. A multi-angle directional cable radiation device for nuclear power plant cables according to claim 1, characterized in that, A power receiving feed ring (1401) is installed inside the two positioning rings (14). A power receiving pantograph (2105) is installed on the outside of the first-stage high-energy electron gun (2101), the second-stage high-energy electron gun (2102), the third-stage high-energy electron gun (2103), and the fourth-stage high-energy electron gun (2104). A power receiving end plate (2106) is installed at the center point of each power receiving pantograph (2105). A high-voltage distribution box (16) is installed on the lower side of the two positioning rings (14). Each power receiving end plate (2106), the power receiving feed ring (1401), and the high-voltage distribution box (16) are electrically connected.

3. A multi-angle directional cable radiation device for nuclear power plant cables according to claim 2, characterized in that, Each of the sliders (2302) has an inner clamping plate (2306) on the outer wall of one side close to the other, and a multi-directional spring (2305) is installed between each inner clamping plate (2306) and the slider (2302).

4. A multi-angle directional cable radiation device for nuclear power plant cables according to claim 3, characterized in that, The upper surface of the transfer workbench (17) is rotatably connected with multiple guide wheels (1202) in the vertical upward direction. The guide wheels (1202) are positioned at the corner and horizontal position of the cable body (24). The two interface sleeves (12) are rotatably installed with movable rings (1201), and the two movable rings (1201) are also rotatably installed with guide wheels (1202). The guide wheels (1202) located at the horizontal position of the cable body (24) and located inside the movable rings (1201) are symmetrically distributed along the cable body (24).

5. A multi-angle directional cable radiation device for nuclear power plant cables according to claim 4, characterized in that, The traction workbench (18) is provided with a take-up reel (19) and a secondary drive structure (20) at the end position. A transverse slide groove (1801) is provided on the upper surface of the traction workbench (18). A sliding table (1803) is slidably installed inside the transverse slide groove (1801). A threading ring (1802) is installed at the center point of the upper surface of the sliding table (1803). An electric push cylinder (1804) is installed on one side of the traction workbench (18). The output shaft of the electric push cylinder (1804) is fixedly connected to the sliding table (1803).

6. A multi-angle directional cable radiation device for nuclear power plant cables according to claim 5, characterized in that, When the cable body (24) is radiated using a radiation device, the first-stage high-energy electron gun (2101), the second-stage high-energy electron gun (2102), the third-stage high-energy electron gun (2103), and the fourth-stage high-energy electron gun (2104) rotate in a directional ring while the radiation tube (21) rotates. The cable body (24) moves horizontally at a constant speed from left to right. The first-stage high-energy electron gun (2101), the second-stage high-energy electron gun (2102), the third-stage high-energy electron gun (2103), and the fourth-stage high-energy electron gun (2104) form irradiation zone 1, irradiation zone 2, irradiation zone 3, and irradiation zone 4 on the cable body (24), respectively. The trajectories of the irradiation zone 1, irradiation zone 2, irradiation zone 3, and irradiation zone 4 are spiral-shaped, and the intervals between the irradiation zone 1, irradiation zone 2, irradiation zone 3, and irradiation zone 4 are equal.

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