Low-noise cable for detector

Abstract

The utility model discloses a detector low-noise cable, which comprises a conductor, and an insulating layer and a sheath layer which are coaxially arranged on the outer side of the conductor in sequence, a shielding layer and an isolating layer are arranged between the insulating layer and the sheath layer, a semi-conductive adhesive layer is coated on the outer side surface of the conductor, and the semi-conductive adhesive layer is coated on the outer side surface of the conductor. The insulating layer is tightly coated on the outer side of the conductor through the semi-conductive adhesive layer, a semi-conductive wrapping layer is tightly arranged on the outer side of the insulating layer, and the semi-conductive tape of the semi-conductive wrapping layer obtained through covering and wrapping further comprises a base material layer and a nano conductive particle coating sprayed on the surface of at least one side of the base material layer. According to the utility model, the interference of an external complex environment on signal transmission can be shielded, bad interference caused by changes of an internal electric field and a magnetic field can be reduced, and the uniformity and stability of weak signal transmission and the reliability under long-term complex working conditions can be improved.

Description

Technical Field

[0001] This utility model relates to a low-noise cable for detectors, belonging to the field of off-site nuclear testing cable technology. Background Technology

[0002] With the rapid development of the nuclear power industry, the demand for data cables used in nuclear power plants is increasing, and the requirements are becoming more stringent. Currently, data cables used in nuclear power plants must meet the requirement of "electromagnetic compatibility" and be free from electromagnetic interference, and the technical performance requirements for halogen-free, low-smoke, and corrosion-resistant properties are extremely stringent. Using ordinary data cables often results in defects such as unstable signal transmission, malfunctions, or intermittent and uncontrolled signal transmission. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a low-noise cable for detectors. This low-noise cable can shield the signal transmission from the interference of complex external environment, reduce the adverse interference caused by changes in internal electric and magnetic fields, and improve the uniformity and stability of weak signal transmission and the reliability under long-term complex working conditions.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a low-noise cable for a detector, comprising: a conductor and an insulation layer and a sheath layer coaxially disposed on the outside of the conductor, wherein a shielding layer and an isolation layer are disposed between the insulation layer and the sheath layer, a semi-conductive adhesive layer is coated on the outer surface of the conductor, the insulation layer is tightly wrapped around the outside of the conductor through the semi-conductive adhesive layer, and a semi-conductive wrapping layer is tightly disposed on the outside of the insulation layer, wherein the semi-conductive strip of the semi-conductive wrapping layer obtained by overlapping and wrapping further comprises: a substrate layer and a nano-conductive particle coating sprayed on at least one side surface of the substrate layer.

[0005] The following are further improvements to the above technical solution:

[0006] 1. In the above scheme, the semiconductive adhesive layer is obtained by curing semiconductive adhesive coated on the outer surface of the conductor.

[0007] 2. In the above scheme, the substrate layer is a PET substrate layer or a nylon substrate layer.

[0008] 3. In the above scheme, the nano-conductive particle coating is a nano-carbon black particle coating, a nano-hollow carbon tube coating, or a nano-silver particle coating.

[0009] 4. In the above scheme, a first braided shielding layer, a second braided shielding layer, a first aluminum foil wrapping layer, a second aluminum foil wrapping layer, a first isolation layer, and a second isolation layer are sequentially provided between the semiconductive wrapping layer and the sheath layer.

[0010] 5. In the above scheme, both the first aluminum foil wrapping layer and the second aluminum foil wrapping layer are formed by wrapping with aluminum-plastic composite tape.

[0011] 6. In the above scheme, both the first isolation layer and the second isolation layer are formed by wrapping with polyimide tape.

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

[0013] This utility model discloses a low-noise detector cable, in which a semi-conductive adhesive layer is coated on the outer surface of the conductor, and an insulating layer is tightly wrapped around the outer surface of the conductor through the semi-conductive adhesive layer. A semi-conductive wrapping layer is tightly disposed on the outer surface of the insulating layer. The semi-conductive wrapping layer obtained by overlapping and wrapping further includes: a substrate layer and a nano-conductive particle coating sprayed on at least one side of the substrate layer. It can withstand complex environments such as high temperature, high pressure and high radiation for a long time, shield the interference of complex external environment on signal transmission, reduce adverse interference caused by changes in internal electric field and magnetic field, and improve the uniformity and stability of weak signal transmission and the reliability under long-term complex working conditions. Attached Figure Description

[0014] Appendix Figure 1 This is a schematic diagram of the structure of the low-noise cable for the detector of this utility model;

[0015] Appendix Figure 2 This is a schematic cross-sectional view of the semiconductive strip in the low-noise cable of the detector of this utility model.

[0016] In the above figures: 1. Conductor; 2. Insulating layer; 3. Semiconducting adhesive layer; 4. Semiconducting wrapping layer; 41. Substrate layer; 42. Nano-conductive particle coating; 51. First braided shielding layer; 52. Second braided shielding layer; 6. First aluminum foil wrapping layer; 7. Second aluminum foil wrapping layer; 8. First isolation layer; 9. Second isolation layer; 10. Sheath layer. Detailed Implementation

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

[0018] Example 1: A low-noise cable for a detector, comprising: a conductor 1 and an insulation layer 2 and a sheath layer 10 coaxially disposed on the outside of the conductor 1, wherein a shielding layer and an isolation layer are disposed between the insulation layer 2 and the sheath layer 10, a semi-conductive adhesive layer 3 is coated on the outer surface of the conductor 1, the insulation layer 2 is tightly wrapped around the outside of the conductor 1 by the semi-conductive adhesive layer 3, and a semi-conductive wrapping layer 4 is tightly disposed on the outside of the insulation layer 2, wherein the semi-conductive strip of the semi-conductive wrapping layer 4 obtained by overlapping and wrapping further comprises: a substrate layer 41 and a nano-conductive particle coating 42 sprayed on at least one side surface of the substrate layer 41.

[0019] The semiconductive adhesive layer 3 is obtained by curing the semiconductive adhesive coated on the outer surface of the conductor 1; the substrate layer 41 is a PET substrate layer; the nano-conductive particle coating 42 is a nano-carbon black particle coating.

[0020] The first aluminum foil wrapping layer 6 and the second aluminum foil wrapping layer 7 are both formed by wrapping with aluminum-plastic composite tape; the first isolation layer 8 and the second isolation layer 9 are both formed by wrapping with polyimide tape; and the conductor 1 is a silver-plated copper conductor.

[0021] Example 2: A low-noise cable for a detector, comprising: a conductor 1 and an insulation layer 2 and a sheath layer 10 coaxially disposed on the outside of the conductor 1, wherein a shielding layer and an isolation layer are disposed between the insulation layer 2 and the sheath layer 10, a semi-conductive adhesive layer 3 is coated on the outer surface of the conductor 1, the insulation layer 2 is tightly wrapped around the outside of the conductor 1 by the semi-conductive adhesive layer 3, and a semi-conductive wrapping layer 4 is tightly disposed on the outside of the insulation layer 2, wherein the semi-conductive wrapping layer 4 obtained by overlapping and wrapping further comprises: a substrate layer 41 and a nano-conductive particle coating 42 sprayed on at least one side of the substrate layer 41, the product having good electrical performance, anti-electromagnetic interference and low noise characteristics.

[0022] The substrate layer 41 is a nylon substrate layer; the nano-conductive particle coating 42 is a nano-hollow carbon nanotube coating.

[0023] Between the aforementioned semiconductive wrapping layer 4 and the sheath layer 10, there are sequentially arranged a first braided shielding layer 51, a second braided shielding layer 52, a first aluminum foil wrapping layer 6, a second aluminum foil wrapping layer 7, a first isolation layer 8, and a second isolation layer 9.

[0024] Conductor 1 is a silver-plated copper conductor; the above-mentioned insulation layer 2 is an irradiated cross-linked polyethylene insulation layer, which is extruded and coated onto the semi-finished conductor by a high-temperature extruder, and cooled by a hot water cooling tank at a water temperature of 90°C to avoid excessively rapid cooling of the insulation; the above-mentioned sheath layer 10 is an irradiated cross-linked polyolefin sheath layer, which is cross-linked by electron accelerator after extrusion. The product has a wide range of applications and features flame retardancy, low smoke, halogen-free, and waterproof characteristics. The outer protective layer has the characteristics of compression resistance, tensile strength, corrosion resistance, and wear resistance.

[0025] This invention is suitable for transmitting extremely weak voltage signals or providing DC high voltage to equipment, and has the following advantages compared to existing cables:

[0026] The aforementioned detector low-noise cable can withstand complex environments such as high temperature, high pressure and high radiation for a long time, shield the signal transmission from the complex external environment, reduce the adverse interference caused by changes in the internal electric field and magnetic field, and improve the uniformity and stability of weak signal transmission and the reliability under long-term complex working conditions.

[0027] The product has a long-term operating temperature of 50℃ and a normal service life of 60 years; it can withstand a cumulative dose of 600kGy of gamma rays and a cumulative dose of 2100kGy of beta rays; it can withstand 115 days of DBA and DBA condition simulation tests with chemical spraying, with a maximum temperature of 226℃ and a maximum pressure of 563.7kPa.

[0028] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A detector low-noise cable, comprising: The conductor (1) and the insulating layer (2) and the sheath layer (10) are coaxially disposed on the outside of the conductor (1), characterized in that: a shielding layer and an isolation layer are disposed between the insulating layer (2) and the sheath layer (10), a semi-conductive adhesive layer (3) is coated on the outer surface of the conductor (1), the insulating layer (2) is tightly wrapped around the outside of the conductor (1) through the semi-conductive adhesive layer (3), a semi-conductive wrapping layer (4) is tightly disposed on the outside of the insulating layer (2), and the semi-conductive strip of the semi-conductive wrapping layer (4) obtained by overlapping and wrapping further includes: a substrate layer (41) and a nano-conductive particle coating (42) sprayed on at least one side surface of the substrate layer (41).

2. The detector low-noise cable according to claim 1, characterized in that: The semiconductive adhesive layer (3) is obtained by curing the semiconductive adhesive coated on the outer surface of the conductor (1).

3. The detector low-noise cable according to claim 1, characterized in that: The substrate layer (41) is a PET substrate layer or a nylon substrate layer.

4. The detector low-noise cable according to claim 1, characterized in that: The nano-conductive particle coating (42) is a nano-carbon black particle coating, a nano-hollow carbon tube coating, or a nano-silver particle coating.

5. The detector low-noise cable according to claim 1, characterized in that: Between the semiconductive wrapping layer (4) and the sheath layer (10), there are sequentially arranged a first braided shielding layer (51), a second braided shielding layer (52), a first aluminum foil wrapping layer (6), a second aluminum foil wrapping layer (7), a first isolation layer (8), and a second isolation layer (9).

6. The detector low-noise cable according to claim 5, characterized in that: The first aluminum foil wrapping layer (6) and the second aluminum foil wrapping layer (7) are both formed by wrapping with aluminum-plastic composite tape.

7. The detector low-noise cable according to claim 5, characterized in that: Both the first isolation layer (8) and the second isolation layer (9) are formed by wrapping with polyimide tape.

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