High-temperature-resistant, damp-heat-resistant, radiation-resistant, tensile and vibration-resistant nuclear power wire harness

Abstract

The invention discloses a high-temperature-resistant, damp-heat-resistant, radiation-resistant, tensile and vibration-resistant nuclear power wire harness, which is characterized by comprising a tail accessory matched with a nuclear power socket and a metal corrugated pipe matched with the tail accessory, and a cabling lead is arranged in the metal corrugated pipe and matched with the metal corrugated pipe through a radiation-resistant and high-temperature-resistant pouring sealant. The structure has good flexibility and tensile strength, the pitch of the metal corrugated pipe is flexible, good flexibility is achieved, and the blocking phenomenon is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of nuclear power cables, and specifically relates to a nuclear power cable harness that is resistant to high temperature, moisture and heat, radiation, tension and vibration, and is used for interconnecting a 1E-level control room in a nuclear island area with a rod control rod position sensor harness to achieve temperature health monitoring inside a pressurized water reactor. Background Art

[0002] China is the third largest country in the world in terms of nuclear power installed capacity. As of June 30, 2024, there are 56 nuclear power units in operation in my country with an installed capacity of 58,218.34MWe (rated installed capacity). From January to June 2024, the cumulative power generation of operating nuclear power units is 212.261 billion kWh, accounting for 4.79% of the country's cumulative power generation. Nuclear energy, as a clean, efficient and reliable energy, plays an important role in the transformation of my country's energy structure. With the increasing demand for renewable energy in China, nuclear energy will occupy a more important position in the future energy structure. As an important part of nuclear power units, nuclear power harnesses are installed in the high temperature, high humidity and high radiation environment of the nuclear industry core measurement system, which is directly related to the safety and reliability of nuclear power plants and reactors. From the overall trend of nuclear power development, it is directly related to the safety and reliability of nuclear power plants and reactors. Judging from the overall trend of nuclear power development, China's technical and strategic routes for nuclear power development have long been clearly defined and are being implemented. Currently, pressurized water reactors are being developed, fast neutron reactors are being developed in the medium term, and fusion reactors are being developed in the long term. With the rapid development of the nuclear industry, it will greatly promote the development of metallurgy, chemical industry, machinery manufacturing, electronics, radiation chemistry, nuclear medicine, nuclear electronics and other fields, and the demand for nuclear power harness components will become increasingly greater. Summary of the invention

[0003] The purpose of the present invention is to provide a nuclear power harness that is resistant to high temperature, moisture and heat, radiation, tension and vibration, which is used to interconnect the 1E-level control room in the nuclear island area with the rod control rod position sensor harness to achieve the function of internal temperature health monitoring of the pressurized water reactor, so as to solve the problems in the prior art.

[0004] The present invention is achieved through the following technical scheme: a nuclear power harness that is resistant to high temperature, moisture and heat, radiation, tension and vibration, characterized in that it includes a tail accessory that matches the nuclear power socket, and a metal bellows that matches the tail accessory, a cable conductor is arranged in the metal bellows, and the cable conductor is matched with the metal bellows through a radiation-resistant high-temperature potting glue.

[0005] Further: the metal bellows is made of stainless steel.

[0006] Further: 360° circumferential laser welding is performed at the joints of the nuclear power socket and the tail attachment, and at the joints of the tail attachment and the metal bellows.

[0007] Furthermore: it also includes a shielding ring, which is connected to the cabled conductor and is sleeved on the outside of the connector and is tightened by a nut.

[0008] The advantages of the present invention are: the structure of the present invention has good softness and tensile strength, the metal bellows has flexible pitch, good scalability and no blocking. In order to ensure the sealing requirements, the nuclear power harness adopts a method combining laser welding technology with potting technology, laser welding is performed at the joints between the connector and the tail attachment, and the tail attachment and the bellows, and a double-layer potting process is used inside the harness, first the bottom layer is fixed with epoxy resin, and then the radiation-resistant glue is potted, and the protection level can reach IP68; the stainless steel bellows and the radiation-resistant wire shielding layer constitute a double-layer shielding system, which improves the shielding effectiveness of the nuclear power harness and can ensure the stability of signal transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a partial structural cross-sectional view of the present invention; Figure 3 It is a partial structural schematic diagram of the connecting piece of the present invention.

[0010] Explanation of the serial numbers in the figure: 1 is the nuclear power socket, 2 is the tail accessory, 3 is the cable conductor, 4 is the radiation-resistant high-temperature potting glue, 5 is the metal bellows, 6 is the shielding ring, 7 is the nut, and 8 is the shielding layer of the conductor. DETAILED DESCRIPTION

[0011] like Figure 1-3 As shown, the present invention discloses a nuclear power harness that is resistant to high temperature, moisture and heat, radiation, tension and vibration, including a tail accessory 2 matched with a nuclear power socket 1, and a metal bellows 5 matched with the tail accessory 2, a cabled conductor 3 is arranged in the metal bellows 5, and the cabled conductor 3 is matched with the metal bellows 5 through a radiation-resistant high-temperature potting glue 4.

[0012] Preferably, the metal bellows 5 is made of stainless steel.

[0013] Preferably, 360° circumferential laser welding is performed at the joints between the nuclear power socket 1 and the tail attachment 2 , and between the tail attachment 2 and the metal bellows 5 .

[0014] Preferably, a shielding ring 6 is also included, which is connected to the cabled conductor 3 and is sleeved on the outside of the connector and is tightened by a nut 7 .

[0015] Preferably, the tail accessory is a wire clamp type, which cooperates with the tail nut. A shielding ring is arranged outside the wire clamp of the tail accessory, and the shielding layer 8 of the wire contacts the shielding ring after being turned out by the wire clamp, and then clamped by the nut, thereby improving the shielding ability and radiation resistance.

[0016] In the present invention, by selecting stainless steel bellows as the main material for external protection, it plays the role of high temperature resistance and radiation resistance (up to 2MGy); stainless steel material is combined with the bellows structure to improve the mechanical properties of the wiring harness, so that the wiring harness has a certain degree of softness and tensile and vibration resistance; the connector (socket) uses stainless steel as the main shell material, combined with the sealing method of the phenyl ether support sealing ring, which greatly improves the radiation resistance of the connector product. In order to reduce the volume of the connector while ensuring a sufficient number of contact definitions, the contact body welding cup arrangement adopts a "tower-type" structure to improve the weldability of the connector and the wire; the connector adds a protective cover structure to achieve a 10-meter water depth seal after the product is covered with a protective cover; the laser welding process is applied to the wiring harness product, and a 360° laser welding is performed at the junction of the connector and the tail attachment, and the tail attachment and the bellows to ensure the sealing of the wiring harness. The inside of the wiring harness adopts a double-layer potting process, first using epoxy resin to fix the bottom layer, and then potting the radiation-resistant glue to protect the welding point from stress.

[0017] The present invention is further described below by way of examples.

[0018] Embodiment: This embodiment provides a nuclear power harness that is resistant to high temperature, moisture and heat, radiation, tension and vibration. A stainless steel bellows is selected as the harness external protection system, and laser welding technology and internal sealing technology are used to make the nuclear power harness reach the IP68 protection level, improve the connection reliability, and enhance the radiation resistance level.

[0019] The wire harness structure is a stainless steel metal corrugated tube with cable conductors. This structure has the advantages of good mechanical properties, electromagnetic shielding performance, small bending radius, strong corrosion resistance, flame retardancy, good elasticity, etc. At the same time, the stainless steel corrugated tube is an integrated structure with good sealing performance. The air tightness index can reach a leakage rate of ≤1×10-5Pa·m 3 / s.

[0020] In order to meet the environmental, electrical and installation requirements of nuclear power harnesses, a special connector for nuclear power is designed. Stainless steel is selected as the shell material, and the connector rubber parts are made of phenylene ether silicone rubber. Phenylene ether silicone rubber contains more phenyl groups and has good radiation resistance. In order to reduce the size of the connector while ensuring a sufficient number of contact definitions, the contact body welding cup arrangement adopts a "tower-type" structure, which greatly compresses the radial size of the connector, while increasing the welding operation space and improving the weldability of the connector.

[0021] Laser welding is performed at the joints between the connector and the tail attachment, and between the tail attachment and the bellows, to achieve a sealed connection between the metal bellows and the connector as a whole, ensuring the product's good air tightness and electromagnetic shielding. 360° circular laser welding is used in the wiring harness processing process, and a limit step design is performed at the joint between the connector and the tail attachment, and the contact position between the connector and the tail attachment is flush, which improves the efficiency of laser welding, changes filler welding to fusion welding, makes the welding joint position more solid, and improves the appearance quality of the welding position.

[0022] The tail accessories of the wiring harness use wire clamp type shielded tail accessories. This type of tail accessories can not only squeeze the wire clamp after tightening the external cap, clamp the shielding layer of the wiring harness to prevent the wire termination point from being stressed, but also make the shielding layer of the wiring harness 360° connected to the shell, thereby improving the cable's ability to resist electromagnetic interference.

[0023] To ensure the shielding effect, the wire harness adopts an inner and outer double-layer shielding system: the outer layer is protected by stainless steel bellows and metal hard tubes. The bellows is an integrated structure. The tail accessories and the stainless steel bellows and the connector shell are connected by laser welding to form an outer shielding layer with a shielding density of up to 100%. Radiation-resistant shielded wires are used inside the wire harness. The wire shielding layer and the tail accessories are compressed by shielding rings and tail nuts to form an inner shielding system.

[0024] The above embodiments are only used to help understand the method and core idea of ​​this patent; at the same time, for those skilled in the art, according to the idea of ​​this patent, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting this patent.

Claims

1. A nuclear power harness that is resistant to high temperature, humidity, radiation, tension and vibration, characterized in that: It comprises a tail accessory (2) matched with a nuclear power socket (1), and a metal bellows (5) matched with the tail accessory (2), a cable conductor (3) is arranged in the metal bellows (5), and the cable conductor (3) is matched with the metal bellows (5) through a radiation-resistant high-temperature potting glue (4).

2. The nuclear power harness according to claim 1 that is resistant to high temperature, humidity, radiation, tension and vibration, characterized in that: The metal bellows (5) is made of stainless steel.

3. The nuclear power harness according to claim 1 that is resistant to high temperature, humidity, radiation, tension and vibration, and is characterized by: Circumferential 360° laser welding is performed at the joints between the nuclear power socket (1) and the tail attachment (2), and between the tail attachment (2) and the metal bellows (5).

4. The nuclear power harness according to claim 1 that is resistant to high temperature, humidity, radiation, tension and vibration, and is characterized by: It also includes a shielding ring, which is connected to the cable conductor (3) and is sleeved on the outside of the connecting piece and is tightened by a nut.

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