Unarmored nuclear detection cable

Abstract

The utility model discloses an unarmored nuclear detection cable, which comprises a cable core and a sheath, the cable core is formed by twisting a central wire core and a plurality of combined wire cores arranged around the central wire core, the sheath is arranged outside the cable core, and the outer diameters of the central wire core and the combined wire cores are the same. Each combined wire core is in abutting contact with the central wire core and the adjacent combined wire core, and the central wire core further comprises a steel wire rope formed by twisting a plurality of steel wires and a coating layer arranged on the outer side of the steel wire rope. The steel wire rope is placed in the center of the cable, so that the bending performance of the cable is improved while the bearing requirement is met.

Description

Technical Field

[0001] The utility model relates to an armor-free nuclear detection cable, belonging to the technical field of nuclear power station detection. Background Art

[0002] Nuclear detection cable is a special cable in the operation monitoring system of nuclear power plants. This type of cable is usually installed in the monitoring area of ​​nuclear power plants, and various indicators of nuclear power plant operation are fed back through monitoring. In order to meet the load-bearing requirements, nuclear detection cables in the existing technology generally adopt a steel belt armored structure, which makes the cable harder and has low bending performance. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an unarmored nuclear detection cable. The unarmored nuclear detection cable places a steel wire rope at the center of the cable, thereby meeting the load-bearing requirements and improving the bending performance of the cable.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: an unarmored nuclear detection cable, comprising: a cable core formed by a center line core and a plurality of combined line cores arranged around the center line core, and a sheath arranged on the outside of the cable core, the outer diameters of the center line core and the combined line cores are the same, each of the combined line cores is in pressure contact with the center line core and the adjacent combined line cores, and the center line core further includes a steel wire rope formed by a plurality of steel wires twisted together and a coating layer arranged on the outside of the steel wire rope.

[0005] The further improved scheme in the above technical scheme is as follows:

[0006] 1. In the above scheme, the six combined cores are arranged in sequence along the circumferential direction on the outside of the central core, of which two combined cores are used to transmit detection signals, and the other two combined cores are used to power the detection device and control the detection device according to the feedback of the detection signal.

[0007] 2. In the above scheme, the two combined wire cores for transmitting the detection signal are respectively arranged on both sides of the central wire core.

[0008] 3. In the above scheme, the combined wire core includes a conductor and an insulating layer arranged on the outside of the conductor.

[0009] 4. In the above scheme, a sheath layer is provided on the outside of the insulation layer of the two combined wire cores used to transmit the detection signal.

[0010] 5. In the above solution, the coating layer on the outside of the steel wire rope is a polyolefin coating layer.

[0011] 6. In the above scheme, a high temperature resistant polyester tape is wrapped between the cable core and the sheath and on the outer surface of the cable core, and a halogen-free flame retardant tape is tightly wrapped around the outer side of the high temperature resistant polyester tape, and the halogen-free flame retardant tape and the high temperature polyester tape are wrapped in opposite directions.

[0012] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0013] The utility model discloses an unarmored nuclear detection cable, wherein the outer diameters of the center core and the combined core are the same, each combined core is in pressure contact with the center core and the adjacent combined cores, the center core further comprises a steel wire rope formed by twisting a plurality of steel wires and a coating layer arranged on the outside of the steel wire rope, and the steel wire rope is placed at the center of the cable, which improves the bending performance of the cable while meeting the load-bearing requirements, and can also reduce the overall outer diameter of the cable and ensure the stability of the overall structure while meeting the transmission of multiple signals and electric energy, thereby saving laying space and facilitating laying and installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Attached Figure 1 This is a schematic diagram of the structure of the utility model unarmored nuclear detection cable;

[0015] Attached Figure 2 This is a schematic diagram of the structure of the cable core in the unarmored nuclear detection cable of the utility model;

[0016] Attached Figure 3 It is a schematic diagram of the partial structure of the unarmored nuclear detection cable of the utility model.

[0017] In the above figures: 1, center core; 2, combined core; 21, conductor; 22, insulation layer; 23, sheath layer; 3, sheath; 31, inner sheath layer; 32, outer sheath layer; 4, wire rope; 5, covering layer; 61, high temperature resistant polyester tape; 62, halogen-free flame retardant tape; 7, shielding layer. DETAILED DESCRIPTION

[0018] The present invention can be further understood through the specific embodiments given below, but they are not intended to limit the present invention.

[0019] Embodiment 1: An unarmored nuclear detection cable, comprising: a cable core formed by a center core 1 and a plurality of combined cores 2 arranged around the center core 1, and a sheath 3 arranged on the outside of the cable core, wherein the center core 1 and the combined cores 2 have the same outer diameter, and each of the combined cores 2 is in pressure contact with the center core 1 and the adjacent combined cores 2, and the center core 1 further comprises a steel wire rope 4 formed by a plurality of steel wires twisted together and a coating 5 arranged on the outside of the steel wire rope 4, and the steel wire rope is placed at the center of the cable to achieve a load-bearing effect, and the cable has excellent bending performance.

[0020] The above-mentioned 6 combined cores 2 are arranged in sequence along the circumferential direction on the outside of the central core 1, of which 2 combined cores 2 are used to transmit detection signals, and the other 2 combined cores 2 are used to power the detection equipment and control the detection equipment according to the feedback of the detection signals, and the remaining 2 combined cores are used as spare cores to meet different usage requirements.

[0021] The two combined wire cores 2 for transmitting the detection signal are respectively arranged on both sides of the central wire core 1.

[0022] The combined wire core 2 mentioned above includes a conductor 21 and an insulating layer 22 arranged outside the conductor 21 .

[0023] The conductor 21 of the combined wire core 2 is a copper conductor or a tinned copper conductor; the insulation layer 22 of the combined wire core 2 is a radiation cross-linked polyolefin insulation layer.

[0024] A sheath layer 23 is provided on the outer side of the insulation layer 22 of the two combined wire cores 2 for transmitting the detection signal.

[0025] The sheath layer 23 is a low-smoke, halogen-free, flame-retardant polyolefin sheath layer.

[0026] The coating layer 5 on the outer side of the steel wire rope 4 is a low-smoke, halogen-free and flame-retardant polyolefin coating layer.

[0027] Embodiment 2: An unarmored nuclear detection cable, comprising: a cable core formed by a center core 1 and a plurality of combined cores 2 twisted in the right direction around the center core 1, and a sheath 3 arranged on the outside of the cable core, wherein the center core 1 and the combined cores 2 have the same outer diameter, and each of the combined cores 2 is in pressure contact with the center core 1 and adjacent combined cores 2, and the center core 1 further comprises a steel wire rope 4 formed by a plurality of steel wires twisted together, and a coating 5 arranged on the outside of the steel wire rope 4.

[0028] The above-mentioned 6 combined cores 2 are arranged in sequence along the circumferential direction on the outside of the center core 1, of which 2 combined cores 2 are used to transmit detection signals, and the other 2 combined cores 2 are used to power the detection equipment and control the detection equipment according to the feedback of the detection signals. The outer diameters of various types of cores inside the cable are consistent, and 6 combined cores are placed outside the center core of the cable, which makes the cable processing simple and the structure stable. The overall outer diameter of the cable is small, which is conducive to saving laying space and reducing the opening size of supporting equipment.

[0029] The two combined wire cores 2 for transmitting the detection signal are respectively arranged on both sides of the central wire core 1.

[0030] The coating layer 5 on the outer side of the steel wire rope 4 is a low-smoke, halogen-free and flame-retardant polyolefin coating layer.

[0031] A high temperature resistant polyester tape 61 is wrapped between the cable core and the sheath 3 and on the outer surface of the cable core. A halogen-free flame retardant tape 62 is tightly wrapped around the outer side of the high temperature resistant polyester tape 61. The halogen-free flame retardant tape 62 is wrapped in the opposite direction to the high temperature polyester tape 61.

[0032] A shielding layer 7 is arranged between the halogen-free flame retardant tape 62 and the sheath 3 , and the shielding layer 7 is woven from tinned copper wires.

[0033] The above-mentioned sheath 3 further includes an inner sheath layer 31 coated on the outside of the shielding layer 7 and an outer sheath layer 32 arranged on the outside of the inner sheath layer 31; the inner sheath layer 31 is a polyethylene sheath layer, and the outer sheath layer 32 is a low-smoke, halogen-free and flame-retardant polyolefin sheath layer. The cable meets the requirements of low-smoke, halogen-free and flame-retardant, and has excellent radiation resistance and can withstand a cumulative radiation dose of 250kGy.

[0034] The above-mentioned unarmored nuclear detection cable is used, which places the steel wire rope at the center of the cable, which improves the bending performance of the cable while meeting the load-bearing requirements. It can also reduce the overall outer diameter of the cable and ensure the stability of the overall structure while meeting the transmission of various signals and electrical energy, saving laying space and facilitating laying and installation.

[0035] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. An unarmored nuclear detection cable, include: A cable core formed by twisting a center core (1) and a plurality of combined cores (2) arranged around the center core (1) and a sheath (3) arranged outside the cable core, characterized in that the center core (1) and the combined cores (2) have the same outer diameter, each of the combined cores (2) is in pressure contact with the center core (1) and the adjacent combined cores (2), and the center core (1) further includes a steel wire rope (4) formed by twisting a plurality of steel wires and a sheath (5) arranged outside the steel wire rope (4).

2. The unarmored nuclear detection cable according to claim 1, Features: The six combined wire cores (2) are sequentially arranged along the circumferential direction on the outside of the central wire core (1), wherein two of the combined wire cores (2) are used to transmit detection signals, and the other two combined wire cores (2) are used to supply power to the detection device and to control the detection device according to the feedback of the detection signal.

3. The unarmored nuclear detection cable according to claim 2, Features: Two combined wire cores (2) for transmitting detection signals are respectively arranged on both sides of the central wire core (1).

4. The unarmored nuclear detection cable according to claim 2 or 3, Features: The combined wire core (2) comprises a conductor (21) and an insulating layer (22) arranged outside the conductor (21).

5. The unarmored nuclear detection cable according to claim 4, Features: A sheath layer (23) is provided on the outside of the insulation layer (22) of the two combined wire cores (2) used for transmitting the detection signal.

6. The unarmored nuclear detection cable according to claim 1, Features: The coating layer (5) on the outside of the steel wire rope (4) is a polyolefin coating layer.

7. The unarmored nuclear detection cable according to claim 1, Features: A high temperature resistant polyester tape (61) is wrapped between the cable core and the sheath (3) and on the outer surface of the cable core, and a halogen-free flame retardant tape (62) is tightly wrapped around the outer side of the high temperature resistant polyester tape (61), and the halogen-free flame retardant tape (62) and the high temperature polyester tape (61) are wrapped in opposite directions.

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