Nuclear power station detection cable

Abstract

The utility model discloses a nuclear power station detection cable, which comprises a cable core formed by twisting a plurality of combined wire cores, a metal braid layer arranged on the outer side of the cable core and a sheath located on the outer side of the metal braid layer, a wrapping layer is arranged between the metal braid layer and the cable core, and the wrapping layer is formed by tightly wrapping a composite belt on the outer side of the cable core. A plurality of steel strands which are sequentially arranged in the circumferential direction are arranged between the metal braid layer and the sheath, and each steel strand formed by twisting steel wires abuts against and makes contact with the metal braid layer, the sheath and the adjacent steel strands. According to the utility model, external environment interference can be effectively shielded so as to ensure the stability of signal transmission, the bending performance of the cable can be ensured, the bearing requirement can be met, and the tensile strength of the cable is improved.

Description

Technical Field

[0001] The utility model relates to a nuclear power station detection cable and belongs to the technical field of nuclear power station detection. Background Art

[0002] The detection cable of a nuclear power plant is a special cable in the operation monitoring system of a nuclear power plant. This type of cable is generally suspended and installed in the area to be monitored in the nuclear power plant, and various indicators of the operation of the nuclear power plant are fed back through monitoring. In order to meet the load-bearing requirements, the detection cable in the prior art generally adopts a steel belt armored structure, which makes the cable harder and has low bending performance. If the steel belt armor is removed, the tensile strength of the cable is poor and it is easily disturbed by the external environment, affecting the stability of signal transmission. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a nuclear power plant detection cable, which can effectively shield external environmental interference to ensure the stability of signal transmission, and can meet the load-bearing requirements while ensuring the bending performance of the cable, thereby improving the tensile strength of the cable.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a nuclear power plant detection cable, comprising: a cable core formed by twisting a plurality of combined wire cores, a metal braided layer arranged on the outside of the cable core and a sheath located on the outside of the metal braided layer, a wrapping layer is arranged between the metal braided layer and the cable core, and the wrapping layer is formed by tightly wrapping a composite tape around the outside of the cable core, a plurality of steel strands arranged in sequence along the circumferential direction are arranged between the metal braided layer and the sheath, and each of the steel strands twisted by steel wires is in pressure contact with the metal braided layer, the sheath and adjacent steel strands.

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

[0006] 1. In the above scheme, one of the plurality of combined cores is located at the center of the cable, and the remaining combined cores are arranged in sequence around the combined core located at the center.

[0007] 2. In the above solution, the metal braided layer is woven from bare copper wires or tinned copper wires.

[0008] 3. In the above solution, the composite tape forming the wrapping layer is formed by stacking a high temperature resistant polyester tape and a halogen-free flame retardant tape.

[0009] 4. In the above scheme, the combined wire core includes a conductor and an insulating layer arranged on the outside of the conductor.

[0010] 5. In the above scheme, at least two of the plurality of combined wire cores are used to transmit detection signals, and a shielding layer and a sheath layer are sequentially arranged on the outer sides of the insulation layers of the two combined wire cores used to transmit detection signals.

[0011] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0012] The utility model provides a nuclear power plant detection cable, a sheathing layer is arranged between the metal braiding layer and the cable core, the sheathing layer is formed by tightly wrapping a composite tape around the outside of the cable core, a plurality of steel strands arranged in sequence along the circumferential direction are arranged between the metal braiding layer and the sheath, each steel strand formed by twisting steel wires is in pressure contact with the metal braiding layer, the sheath and the adjacent steel strands, which can effectively shield external environmental interference to ensure the stability of signal transmission, and can meet the load-bearing requirements while ensuring the bending performance of the cable, thereby improving the tensile strength of the cable and the service life under complex working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Attached Figure 1 This is a schematic diagram of the structure of the nuclear power plant detection cable of the utility model;

[0014] Attached Figure 2 For attachment Figure 1 The enlarged schematic diagram of point A in the middle;

[0015] Attached Figure 3 The utility model is a partial structural schematic diagram of a nuclear power plant detection cable.

[0016] In the above figures: 1, cable core; 2, combined wire core; 21, conductor; 22, insulation layer; 23, sheath layer; 24, shielding layer; 3, sheath; 4, steel stranded wire; 5, metal braided layer; 6, wrapping layer; 61, high temperature resistant polyester tape; 62, halogen-free flame retardant tape. DETAILED DESCRIPTION

[0017] The present invention can be further understood through the specific embodiments given below, but they are not intended to limit the present invention.

[0018] Embodiment 1: A nuclear power plant detection cable comprises: a cable core 1 formed by twisting a plurality of combined wire cores 2, a metal braided layer 5 arranged on the outside of the cable core 1 and a sheath 3 located on the outside of the metal braided layer 5, a wrapping layer 6 is arranged between the metal braided layer 5 and the cable core, and the wrapping layer 6 is formed by tightly wrapping a composite tape around the outside of the cable core 1, a plurality of steel strands 4 arranged in sequence along the circumferential direction are arranged between the metal braided layer 5 and the sheath 3, and each of the steel strands 4 twisted by steel wires is in pressure contact with the metal braided layer 5, the sheath 3 and adjacent steel strands 4.

[0019] One of the plurality of combined wire cores 2 is located at the center of the cable, and the remaining combined wire cores 2 are arranged in sequence around the combined wire core 2 located at the center.

[0020] The metal braided layer 5 is braided from bare copper wires.

[0021] The composite tape forming the wrapping layer 6 is formed by stacking a high temperature resistant polyester tape 61 and a halogen-free flame retardant tape 62 .

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

[0023] At least two of the plurality of combined wire cores 2 are used to transmit detection signals. A shielding layer 24 and a sheath layer 23 are sequentially arranged outside the insulation layer 22 of the two combined wire cores 2 for transmitting detection signals.

[0024] The conductor 21 of the combined wire core 2 is a tinned copper conductor, and the insulation layer 22 of the combined wire core 2 is a radiation cross-linked polyolefin insulation layer.

[0025] Embodiment 2: A nuclear power plant detection cable comprises: a cable core 1 formed by twisting a plurality of combined wire cores 2, a metal braided layer 5 arranged on the outside of the cable core 1 and a sheath 3 located on the outside of the metal braided layer 5, a wrapping layer 6 is arranged between the metal braided layer 5 and the cable core, and the wrapping layer 6 is formed by tightly wrapping a composite tape around the outside of the cable core 1, a plurality of steel strands 4 arranged in sequence along the circumferential direction are arranged between the metal braided layer 5 and the sheath 3, and each of the steel strands 4 twisted by steel wires is in pressure contact with the metal braided layer 5, the sheath 3 and adjacent steel strands 4.

[0026] One of the plurality of combined wire cores 2 is located at the center of the cable, and the remaining combined wire cores 2 are arranged in sequence around the combined wire core 2 located at the center.

[0027] The metal braided layer 5 is braided from tinned copper wires.

[0028] The combined wire core 2 mentioned above includes a conductor 21 and an insulating layer 22 arranged outside the conductor 21 .

[0029] The shielding layer 24 is woven from tinned copper wires.

[0030] The conductor 21 of the combined core 2 is a copper conductor, and the insulation layer 22 of the combined core 2 is a radiation cross-linked polyolefin insulation 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.

[0031] The use of the above-mentioned nuclear power plant detection cable can not only effectively shield external environmental interference to ensure the stability of signal transmission, but also meet the load-bearing requirements while ensuring the bending performance of the cable, thereby improving the tensile strength of the cable and its service life under complex working conditions.

[0032] 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. A nuclear power plant detection cable, comprising: A cable core (1) formed by twisting a plurality of combined wire cores (2), a metal braided layer (5) arranged on the outside of the cable core (1), and a sheath (3) located on the outside of the metal braided layer (5), characterized in that a wrapping layer (6) is arranged between the metal braided layer (5) and the cable core, and the wrapping layer (6) is formed by tightly wrapping a composite tape around the outside of the cable core (1); a plurality of steel strands (4) arranged in sequence along the circumferential direction are arranged between the metal braided layer (5) and the sheath (3), and each of the steel strands (4) formed by twisting steel wires is in pressure contact with the metal braided layer (5), the sheath (3) and the adjacent steel strands (4).

2. The nuclear power plant detection cable according to claim 1, characterized in that: One of the plurality of combined wire cores (2) is located at the center of the cable, and the remaining combined wire cores (2) are arranged in sequence around the combined wire core (2) located at the center.

3. The nuclear power plant detection cable according to claim 1, characterized in that: The metal braided layer (5) is braided from bare copper wires or tinned copper wires.

4. The nuclear power plant detection cable according to claim 1, characterized in that: The composite tape forming the wrapping layer (6) is formed by stacking a high-temperature resistant polyester tape (61) and a halogen-free flame-retardant tape (62).

5. The nuclear power plant detection cable according to claim 1, characterized in that: The combined wire core (2) comprises a conductor (21) and an insulating layer (22) arranged outside the conductor (21).

6. The nuclear power plant detection cable according to claim 5, characterized in that: At least two of the plurality of combined wire cores (2) are used to transmit detection signals, and a shielding layer (24) and a sheath layer (23) are sequentially arranged outside the insulation layer (22) of the two combined wire cores (2) used to transmit detection signals.

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