Load-bearing nuclear detection cable

Abstract

The invention discloses a load-bearing nuclear detection cable which comprises a cable core, a wrapping layer wrapping the surface of the outer side of the cable core, a first shielding layer arranged on the outer side of the wrapping layer and a sheath arranged on the outer side of the shielding layer in a sleeving mode, and the cable core is formed by twisting a plurality of signal wire cores, a plurality of control wire cores and a central wire core. The central wire core further comprises an inner core layer formed by twisting a plurality of first steel wires and first aramid fibers which are arranged in a staggered mode and an outer sleeve layer wrapping the inner core layer, and the signal wire core and the control wire core are sequentially arranged around the central wire core arranged in the center and are respectively in abutting contact with the outer sleeve layer of the central wire core. A filling rope is arranged in a gap formed among the signal wire core, the control wire core and the wrapping layer; and the filling rope is formed by twisting a second steel wire and a plurality of second aramid fibers arranged on the outer side of the second steel wire. The cable has good bearing capacity, and the situation that the whole cable is too hard and not prone to bending or poor in bending performance, and consequently use is inconvenient can be avoided.

Description

Technical Field

[0001] The invention relates to a load-bearing nuclear detection cable and belongs to the technical field of nuclear power station detection. Background Art

[0002] Nuclear detection cables are specialized cables used in nuclear power plant operation monitoring systems. These cables are typically suspended and installed in areas requiring monitoring, providing feedback on various plant operational indicators. To meet load-bearing requirements, existing nuclear detection cables typically utilize a steel-tape armored structure, resulting in a rigid cable with poor bending performance. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a load-bearing nuclear detection cable, which has good load-bearing capacity and can avoid the situation where the cable as a whole is too hard and difficult to bend or has poor bending performance, resulting in inconvenience in use.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a load-bearing nuclear detection cable, comprising: a cable core, a sheath wrapped around the outer surface of the cable core, a first shielding layer arranged outside the sheath and a sheath sleeved on the outside of the shielding layer, the cable core is formed by twisting a plurality of signal cores, a plurality of control cores and a center core, the center core further includes an inner core layer formed by twisting a plurality of staggered first steel wires and first aramid wires and an outer jacket layer wrapped on the inner core layer, the signal core and the control core are arranged in sequence around the center core arranged in the center and are respectively pressed and contacted with the outer jacket layer of the center core, a filling rope is provided in the gap formed between the signal core, the control core and the sheath, the filling rope is twisted by a second steel wire and a plurality of second aramid wires arranged outside the second steel wire.

[0005] The further improved scheme in the above technical scheme is as follows: 1. In the above solution, the outer diameters of the center core, signal core and control core are all the same.

[0006] 2. In the above solution, the signal core and the control core both include a conductor and an insulating layer arranged on the outside of the conductor.

[0007] 3. In the above solution, a second shielding layer and a sheath layer are sequentially provided on the outside of the insulation layer of the signal core.

[0008] 4. In the above solution, the first shielding layer and the second shielding layer are woven from bare copper wire or tinned copper wire.

[0009] 5. In the above solution, the wrapping layer is formed by wrapping a high-temperature resistant polyester tape and a halogen-free flame retardant tape around the outside of the cable core in sequence.

[0010] 6. In the above solution, the wrapping directions of the halogen-free flame retardant tape and the high-temperature polyester tape are opposite.

[0011] 7. In the above solution, the sheath further includes an inner sheath layer covering the outside of the shielding layer and an outer sheath layer arranged outside the inner sheath layer.

[0012] 8. In the above solution, the inner sheath layer is a polyethylene sheath layer, and the outer sheath layer is a polyolefin sheath layer.

[0013] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: The load-bearing nuclear detection cable of the present invention has a cable core formed by twisting together a plurality of signal cores, a plurality of control cores and a center core. The center core further includes an inner core layer formed by twisting together a plurality of staggered first steel wires and first aramid wires and an outer jacket layer coated on the inner core layer. The signal cores and the control cores are arranged in sequence around the center core arranged in the center and are respectively pressed and contacted with the outer jacket layer of the center core. A filling rope is provided in the gap formed between the signal core, the control core and the wrapped layer. The filling rope is twisted together by a second steel wire and a plurality of second aramid wires arranged on the outside of the second steel wire. It has good load-bearing capacity and can avoid the situation where the cable as a whole is too hard and difficult to bend or has poor bending performance, resulting in inconvenience in use. The cable has a small overall outer diameter, stable structure and electrical performance, and is easy to lay and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Attachment Figure 1 This is a schematic structural diagram of the load-bearing nuclear detection cable of the present invention; Attachment Figure 2 This is a schematic structural diagram of the center core of the load-bearing nuclear detection cable of the present invention; Attachment Figure 3 This is a schematic structural diagram of the filling rope in the load-bearing nuclear detection cable of the present invention; Attachment Figure 4 This is a schematic structural diagram of the signal core of the load-bearing nuclear detection cable according to the first embodiment of the present invention; Attachment Figure 5 This is a schematic structural diagram of the wrapping layer of Example 1 of the load-bearing nuclear detection cable of the present invention; Attachment Figure 6 This is a schematic structural diagram of the sheath of Example 2 of the load-bearing nuclear detection cable of the present invention.

[0015] In the above drawings: 1. Signal core; 2. Control core; 21. Conductor; 22. Insulation layer; 23. Sheath layer; 24. Second shielding layer; 3. Sheath; 31. Inner sheath layer; 32. Outer sheath layer; 4. Center core; 51. First steel wire; 52. First aramid yarn; 6. Wrapping layer; 61. High-temperature resistant polyester tape; 62. Halogen-free flame retardant tape; 7. First shielding layer; 8. Filling rope; 91. Second steel wire; 92. Second aramid yarn. 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] Example 1: A load-bearing nuclear detection cable, comprising: a cable core, a wrapping layer 6 coated on the outer surface of the cable core, a first shielding layer 7 arranged on the outer side of the wrapping layer 6, and a sheath 3 sleeved on the outer side of the shielding layer 7, wherein the cable core is formed by twisting a plurality of signal cores 1, a plurality of control cores 2, and a center core 4, wherein the center core 4 further comprises an inner core layer 41 formed by twisting a plurality of staggered first steel wires 51 and first aramid wires 52, and an outer sheath 42 coated on the inner core layer 41, wherein the outer sheath 42 is provided on the outer sheath 42. The signal core 1 and the control core 2 are arranged in sequence around the center core 4 set in the center and each is pressed and contacted with the outer jacket layer 42 of the center core 4. The center core with load-bearing capacity is placed in the center of the cable to achieve the load-bearing effect without affecting the bending performance of the cable. A filling rope 8 is provided in the gap formed between the signal core 1, the control core 2 and the sheath 6. The filling rope 8 is twisted by a second steel wire 91 and a plurality of second aramid wires 92 arranged on the outside of the second steel wire 91.

[0018] The outer diameters of the central core 4, signal core 1 and control core 2 are all the same. The outer diameters of the various types of cores inside the cable are consistent. Multiple cores are placed around the central core, making the overall 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. The signal core 1 and the control core 2 both include a conductor 21 and an insulating layer 22 disposed outside the conductor 21 ; a second shielding layer 24 and a sheath layer 23 are sequentially disposed outside the insulating layer 22 of the signal core 1 .

[0019] The above-mentioned wrapping layer 6 is formed by wrapping a high-temperature resistant polyester tape 61 and a halogen-free flame-retardant tape 62 in sequence around the outside of the cable core; the wrapping direction of the above-mentioned halogen-free flame-retardant tape 62 is opposite to that of the high-temperature polyester tape 61. The cable meets the requirements of low smoke, halogen-free and flame retardancy, and has excellent radiation resistance and can withstand a cumulative radiation dose of 250kGy.

[0020] Example 2: A load-bearing nuclear detection cable, comprising: a cable core, a wrapping layer 6 wrapped around the outer surface of the cable core, a first shielding layer 7 arranged outside the wrapping layer 6 and a sheath 3 sleeved on the outside of the shielding layer 7, the cable core is formed by a plurality of signal cores 1, a plurality of control cores 2 and a center core 4 twisted in the right direction, the center core 4 further includes an inner core layer 41 formed by twisting a plurality of staggered first steel wires 51 and first aramid wires 52, and an outer jacket layer 42 wrapped on the inner core layer 41, the signal core 1 and the control core 2 are arranged in sequence around the center core 4 arranged in the center and are respectively pressed and contacted with the outer jacket 42 of the center core 4, a filling rope 8 is provided in the gap formed between the signal core 1, the control core 2 and the wrapping layer 6, the filling rope 8 is twisted by a second steel wire 91 and a plurality of second aramid wires 92 arranged outside the second steel wire 91.

[0021] The first shielding layer 7 and the second shielding layer 24 are woven from tinned copper wires.

[0022] The sheath 3 further includes an inner sheath layer 31 covering the outer side of the shielding layer 7 and an outer sheath layer 32 arranged outside the inner sheath layer 31 .

[0023] 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.

[0024] The above-mentioned load-bearing nuclear detection cable has good load-bearing capacity and can avoid the situation where the cable is too hard and difficult to bend or has poor bending performance, which leads to inconvenience in use. The cable has a small overall outer diameter, stable structure and electrical performance, and is easy to lay and use.

[0025] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made in accordance with the spirit of the present invention are intended to be covered by the scope of protection of the present invention.

Claims

1. A load-bearing nuclear detection cable, comprising: A cable core, a wrapping layer (6) wrapped around the outer surface of the cable core, a first shielding layer (7) arranged outside the wrapping layer (6), and a sheath (3) sleeved outside the shielding layer (7), characterized in that: the cable core is formed by twisting a plurality of signal cores (1), a plurality of control cores (2) and a center core (4), and the center core (4) further includes an inner core layer (41) formed by twisting a plurality of staggered first steel wires (51) and first aramid wires (52), and a sheath (41) wrapped around the inner core layer ( The outer jacket (42) on the outer jacket (41) is provided, the signal core (1) and the control core (2) are arranged in sequence around the central core (4) arranged in the center and are respectively pressed against the outer jacket (42) of the central core (4), and a filling rope (8) is provided in the gap formed between the signal core (1), the control core (2) and the wrapping layer (6), and the filling rope (8) is formed by twisting a second steel wire (91) and a plurality of second aramid yarns (92) arranged on the outside of the second steel wire (91).

2. The load-bearing nuclear detection cable according to claim 1, characterized in that: The outer diameters of the central wire core (4), the signal wire core (1) and the control wire core (2) are all the same.

3. The load-bearing nuclear detection 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).

4. The load-bearing nuclear detection cable according to claim 3, characterized in that: A second shielding layer (24) and a sheath layer (23) are sequentially arranged on the outside of the insulating layer (22) of the signal wire core (1).

5. The load-bearing nuclear detection cable according to claim 4, characterized in that: The first shielding layer (7) and the second shielding layer (24) are woven from bare copper wires or tinned copper wires.

6. The load-bearing nuclear detection cable according to claim 1, characterized in that: The wrapping layer (6) is formed by wrapping a high-temperature resistant polyester tape (61) and a halogen-free flame-retardant tape (62) around the outside of the cable core in sequence.

7. The load-bearing nuclear detection cable according to claim 6, characterized in that: The halogen-free flame retardant tape (62) and the high-temperature polyester tape (61) are wrapped in opposite directions.

8. The load-bearing nuclear detection cable according to claim 1, characterized in that: The sheath (3) further comprises 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).

9. The load-bearing nuclear detection cable according to claim 8, characterized in that: The inner sheath layer (31) is a polyethylene sheath layer, and the outer sheath layer (32) is a polyolefin sheath layer.

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