Nuclear detector cable

Abstract

The utility model discloses a nuclear detector cable which comprises a cable core formed by twisting a plurality of signal wire cores and a plurality of control wire cores and a sheath arranged on the outer side of the cable core, a metal braid layer is arranged between the sheath and the cable core, and buffer strips are filled in gaps formed between the signal wire cores and the control wire cores. Each buffering strip is provided with a plurality of containing holes extending in the length direction of the buffering strip, and at least one steel wire is embedded in each containing hole. According to the utility model, the shock resistance of the cable can be improved, the bearing capacity of detection equipment and the like can be ensured without sacrificing the bending performance, the stability of the detection performance is ensured in a complex detection environment, and the service life is prolonged.

Description

Technical Field

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

[0002] As an important measuring instrument in nuclear science research, nuclear detectors are the source of various information. Nuclear detectors work in harsh environments with high temperatures and high radiation. Cables for nuclear detectors are a special type of cable in the operation monitoring system of a nuclear power plant. Such cables are 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, cables for nuclear detectors in the prior art generally adopt a steel belt armored structure, which makes the cables harder and has low bending performance. In addition, in complex detection environments, the detection performance is poorly stable and has a short service life. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a nuclear detector cable, which can not only improve the impact resistance of the cable, but also ensure the load-bearing capacity of detection equipment without sacrificing the bending performance, and ensure the stability of detection performance and extend service life in complex detection environments.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a nuclear detector cable, comprising: a cable core formed by twisting a plurality of signal cores and a plurality of control cores, and a sheath arranged on the outside of the cable core, a metal braided layer is arranged between the sheath and the cable core, and the gap formed between the signal cores and the control cores is filled with buffer strips, each of the buffer strips is provided with a plurality of accommodating holes extending along its length direction, and at least one steel wire is embedded in the accommodating hole.

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

[0006] 1. In the above solution, the buffer strip is a foam buffer strip.

[0007] 2. In the above solution, at least three mutually twisted steel wires are embedded in the receiving hole.

[0008] 3. In the above scheme, the signal core and the control core both include a conductor and an insulating layer arranged on the outside of the conductor.

[0009] 4. In the above solution, a composite tape consisting of a high temperature resistant polyester tape and a halogen-free flame retardant tape is tightly wrapped on the outer surface of the cable core.

[0010] 5. In the above solution, the sheath further includes an inner sheath layer coated on the outside of the metal braided layer and an outer sheath layer arranged on the outside of the inner sheath layer.

[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 nuclear detector cable, the gap formed between the signal core and the control core is filled with a buffer strip, each buffer strip is provided with a plurality of accommodating holes extending along its length direction, at least one steel wire is embedded in the accommodating hole, which can not only improve the impact resistance of the cable, but also ensure the load-bearing capacity of the detection equipment without sacrificing the bending performance, thereby ensuring the stability of the detection performance and extending the service life in a complex detection environment. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0014] Attached Figure 2 The figure is a schematic diagram of the structure of the signal control cable group in the nuclear detector cable of the utility model.

[0015] In the above figures: 1. signal core; 2. control core; 21. conductor; 22. insulation layer; 23. sheath layer; 24. shielding layer; 3. sheath; 4. buffer strip; 41. accommodation hole; 5. steel wire; 6. wrapping layer; 61. high temperature resistant polyester tape; 62. halogen-free flame retardant tape; 7. metal braided layer. DETAILED DESCRIPTION

[0016] The present invention can be further understood through the specific embodiments given below, but they are not intended to limit the present invention.

[0017] Embodiment 1: A nuclear detector cable comprises: a cable core formed by twisting a plurality of signal cores 1 and a plurality of control cores 2, and a sheath 3 arranged on the outside of the cable core, a metal braided layer 7 is arranged between the sheath 3 and the cable core, and a buffer strip 4 is filled in the gap formed between the signal cores 1 and the control cores 2, each of the buffer strips 4 is provided with a plurality of accommodating holes 41 extending along its length direction, and at least one steel wire 5 is embedded in the accommodating hole 41.

[0018] The buffer strip 4 is a foam buffer strip.

[0019] At least three mutually twisted steel wires 5 are embedded in the accommodating hole 41 .

[0020] The signal core 1 and the control core 2 both include a conductor 21 and an insulating layer 22 arranged outside the conductor 21 .

[0021] A shielding layer 24 and a sheath layer 23 are sequentially arranged outside the insulating layer 22 of the signal wire core 1 .

[0022] The metal braided layer 7 is braided from bare copper wires.

[0023] A composite tape consisting of a high temperature resistant polyester tape 61 and a halogen-free flame retardant tape 62 is tightly wrapped around the outer surface of the cable core.

[0024] Embodiment 2: A nuclear detector cable comprises: a cable core formed by twisting a plurality of signal cores 1 and a plurality of control cores 2, and a sheath 3 arranged on the outside of the cable core, a metal braided layer 7 is arranged between the sheath 3 and the cable core, and the gap formed between the signal cores 1 and the control cores 2 is filled with a buffer strip 4, each of the buffer strips 4 is provided with a plurality of accommodating holes 41 extending along its length direction, and at least one steel wire 5 is embedded in the accommodating hole 41.

[0025] The buffer strip 4 is a foam buffer strip.

[0026] The signal core 1 and the control core 2 both include a conductor 21 and an insulating layer 22 arranged outside the conductor 21 .

[0027] The metal braided layer 7 is braided from tinned copper wires.

[0028] The sheath 3 further includes an inner sheath layer 31 coated on the outside of the metal braided layer 7 and an outer sheath layer 32 arranged on the outside of the inner sheath layer 31 .

[0029] The inner sheath layer 31 is a polyethylene sheath layer, and the outer sheath layer 32 is a low-smoke, halogen-free, flame-retardant polyolefin sheath layer, which meets the requirements of low-smoke, halogen-free, and flame-retardant as a whole, and has excellent radiation resistance and can withstand a cumulative radiation dose of 250 kGy.

[0030] The use of the above-mentioned nuclear detector cable can not only improve the impact resistance of the cable, but also ensure the load-bearing capacity of the detection equipment without sacrificing the bending performance, and ensure the stability of the detection performance and extend the service life in complex detection environments.

[0031] 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 detector cable, comprising: A cable core is formed by twisting a plurality of signal cores (1) and a plurality of control cores (2) together, and a sheath (3) is arranged outside the cable core, a metal braided layer (7) is arranged between the sheath (3) and the cable core, and is characterized in that: a buffer strip (4) is filled in the gap formed between the signal cores (1) and the control cores (2), each of the buffer strips (4) is provided with a plurality of accommodating holes (41) extending along its length direction, and at least one steel wire (5) is embedded in the accommodating hole (41).

2. The nuclear detector cable according to claim 1, characterized in that: The buffer strip (4) is a foam buffer strip.

3. The nuclear detector cable according to claim 1, characterized in that: At least three mutually twisted steel wires (5) are embedded in the accommodating hole (41).

4. The nuclear detector cable according to claim 1, characterized in that: The signal line core (1) and the control line core (2) both comprise a conductor (21) and an insulating layer (22) arranged outside the conductor (21).

5. The nuclear detector cable according to claim 1, characterized in that: A composite tape formed by stacking a high-temperature resistant polyester tape (61) and a halogen-free flame-retardant tape (62) is tightly wrapped around the outer surface of the cable core.

6. The nuclear detector cable according to claim 1, characterized in that: The sheath (3) further comprises an inner sheath layer (31) coated on the outside of the metal braided layer (7) and an outer sheath layer (32) arranged on the outside of the inner sheath layer (31).

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