Shallow sea detection watertight cable

Abstract

The utility model relates to a cable, and aims to provide a watertight cable for shallow sea exploration, which has good watertight performance and good compatibility. According to the technical scheme, the watertight cable for shallow sea detection is characterized in that the watertight cable for shallow sea detection comprises a tensile unit, and a composite signal line layer, a wrapping layer, a shielding signal line layer, a watertight filling layer, an inner sheath layer, an armor layer and an outer sheath layer which are sequentially arranged outside the tensile unit from inside to outside.

Description

Technical Field

[0001] The utility model relates to a cable, in particular to a watertight cable for shallow sea detection. Background Art

[0002] Shallow sea detection watertight cable is a product currently used in shallow sea detection ship equipment. Use depth 0 ～ 450 meters, or exposed to salt spray and sunlight. Required ambient temperature: -40℃~80℃; the minimum bending radius of the cable installation is 6 times the outer diameter of the cable; exposed to salt spray and sunlight, high temperature resistance, oil resistance, aging resistance, salt spray resistance; impact resistance, tensile resistance; longitudinal and transverse watertight requirements, no seawater can enter during use. The commonly used shallow sea detection watertight cable cannot guarantee longitudinal watertight performance; or while ensuring watertightness, it affects the electrical performance of the cable, and there are problems such as poor cable bending resistance and easy breakage of the cable when pulled. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the shortcomings of the above-mentioned background technology and provide a shallow sea detection watertight cable with good watertight performance and good compatibility.

[0004] The technical solution adopted by the utility model is: a shallow sea detection watertight cable, characterized in that: the shallow sea detection watertight cable comprises a tensile unit and a composite signal line layer, a wrapping layer, a shielded signal line layer, a watertight filling layer, an inner sheath layer, an armor layer, and an outer sheath layer which are sequentially arranged outside the tensile unit from the inside to the outside;

[0005] The composite signal line layer includes a plurality of power lines and a plurality of shielded signal line pairs which are sequentially arranged at intervals along the circumferential direction;

[0006] The shielded signal line layer includes a plurality of shielded signal line pairs arranged in sequence along a circumferential direction.

[0007] The shielded signal wire pair comprises two signal wires and two ground wires which are sequentially covered with an aluminum-plastic tape wrapping layer and a tinned copper wire braided shielding layer from the inside to the outside.

[0008] The signal wire and the ground wire both include a conductor and an insulating layer covering the outside of the conductor; the conductor is formed by twisting a plurality of tinned copper wires, and the insulating layer is a cross-linked polyolefin extrusion layer.

[0009] The power cord comprises a conductor and an insulating layer covering the outside of the conductor; the conductor is formed by twisting a plurality of tinned copper wires, and the insulating layer is a cross-linked polyethylene insulating layer.

[0010] The tensile unit is a plurality of water-blocking aramid rods arranged in parallel to each other in a column shape.

[0011] The fiber fineness of the water-blocking aramid rod is 6320 dtex.

[0012] The wrapping layer is a cabling tape wrapping layer, which is used to ensure the roundness of the cabling.

[0013] The watertight filling layer is a water-blocking glue, which is filled in the cable gaps, outside the braided shielding and at the steel wire armor layer to ensure that the cable can be longitudinally water-blocked.

[0014] The inner sheath layer is a chlorosulfonated polyethylene layer, which serves as an inner cushion layer of the armor layer.

[0015] The armor layer is a galvanized steel wire braided layer, which is used to increase the strength of the cable.

[0016] The outer sheath layer is a chlorosulfonated polyethylene layer, which is used to protect the cable.

[0017] The beneficial effects of the utility model are as follows: the provided shallow sea detection watertight cable has the characteristics of good watertight performance, good compatibility, high reliability of electrical signal transmission, high flexibility, bending resistance, low temperature resistance, salt spray resistance, impact resistance, heat shock resistance, oil resistance and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 , is a schematic diagram of the cross-sectional structure of an embodiment of the utility model.

[0019] Numbers in the figure: 1. Shielded signal line pair; 1-1. Signal line; 1-2. Ground line; 2. Power line; 3. Tensile unit; 4. Watertight filling layer; 5. Wrapping layer; 6. Inner sheath layer; 7. Armor layer; 8. Outer sheath layer. DETAILED DESCRIPTION

[0020] The following is a further description with reference to the embodiments shown in the accompanying drawings.

[0021] The structure of shallow sea detection watertight cable is as follows:

[0022] 1. Shielded signal line pairs, 18 pairs;

[0023] 1) Conductor: Multiple tinned copper wires twisted together, each with a diameter of 0.6mm tinned copper wire (0.28mm 2 );

[0024] 2) Insulation layer: cross-linked polyolefin extrusion layer; the outer diameter of the two signal wires 1-1 is (1.8±0.4) mm, blue and white; the two ground wires 1-2 are white;

[0025] 3) Inner shielding layer: aluminum-plastic tape wrapping layer;

[0026] 4) Outer shielding layer: tinned copper wire braided shielding layer; braiding density: ≥80%.

[0027] 2. Power cord (2mm 2 )

[0028] 1) Conductor: 7 tinned copper wires twisted together, each tinned copper wire has a diameter of 0.6mm (2.0mm 2 ); As a preferred embodiment, a water-blocking glue is added when the conductors are twisted to play a longitudinal water-blocking role and prevent seawater from entering the cable along the longitudinal direction of the conductors.

[0029] 2) Insulation layer: cross-linked polyethylene XLPE insulation layer; outer diameter 4.1mm, color: white.

[0030] 3. Tensile unit (center filling)

[0031] It consists of 18 water-blocking aramid fibers with a fiber fineness of 6320 dtex (DTEX). Each fiber can bear a load of 100KG, and 18 fibers can bear a load of 1800Kg. Excluding the tension loss in the production process, calculated at 50%, the tension can reach 900KG, which meets the tensile resistance requirement of the cable to bear a load of 400KG. At the same time, the water-blocking aramid fiber can also play a longitudinal water-blocking role.

[0032] 4. Watertight filling layer

[0033] Watertight filling uses water-blocking glue to fill the cable gaps, braided shielding, steel wire armor layer, etc. to ensure that the cable can be longitudinally water-blocked.

[0034] 5. Wrapping layer

[0035] Use cable wrapping tape to bundle the cables and ensure they are round.

[0036] 6. Inner protective layer

[0037] The inner sheath is made of chlorosulfonated polyethylene layer, which protects the cable core and serves as the inner cushion layer of the armor layer.

[0038] 7. Armor layer

[0039] Galvanized steel wire braided armor is used to protect the cable from compression on the one hand and tension on the other.

[0040] 8. Outer sheath layer

[0041] The chlorosulfonated polyethylene layer has excellent ozone and weather resistance, oil resistance, and solvent resistance; it has good flame retardancy and excellent wear resistance, which improves the environmental resistance and mechanical properties of the cable.

[0042] The electrical properties of the signal line are as follows:

[0043] Conductor DC resistance (Ω / km) (+20℃): ≤70

[0044] Insulation resistance (MΩ km) (DC500V): ≥500

[0045] Insulation electrical strength (AC 1KV / 50Hz, 1min): no breakdown, leakage current ≤5mA

[0046] Working capacitance (nF / km): ≤70

[0047] Characteristic impedance: (100±20)Ω(1MHz~250MHz)

[0048]

[0049] The data in the table include: frequency, attenuation, level near-end crosstalk NEXT, and level far-end crosstalk ELFEXT.

[0050] The power cord can meet the following electrical performance:

[0051] Conductor DC resistance (Ω / km) (±20℃) ≤10 Insulation resistance (MΩ·km) (DC500V) ≥500 Insulation electrical strength (AC 2kV / 50Hz, 5min) No breakdown, leakage ≤5mA Rated current 10A

[0052] The overall performance of the cable meets the following requirements:

[0053] 1. Longitudinal watertightness: Carry out according to the test method watertightness test standard (one end of the 11-meter cable is placed in a pressure vessel with water, and the other end is exposed outside the pressure vessel. After installation, add the following water pressure:

[0054] (Test requirements: 11m, 4.5MPa, 8h), water leakage ≤500ml / h.

[0055] 2 Horizontal watertightness: 4.5MPa, no water seepage for 8h.

[0056] 3 Cable bending (GJB1916-1994):

[0057] Test conditions: bending radius 200mm, load 5kg, bending times 100 times;

[0058] Requirements: No cracking of the sheath and no mixed or broken wires.

[0059] 4 Impact test (GJB 1318-1991)

[0060] Test conditions: height 850mm, weight 1kg, impact times 10 times

[0061] Requirements: No cracking of the sheath and no mixed or broken wires.

[0062] 5 Thermal shock test: According to the test method of GJB 4.2-83, the sample is wound on a cylinder with a radius equal to 8 times the outer diameter of the cable, and placed in a high temperature test box at (80±1)℃ for 4 hours. After the test, it is placed at room temperature for 10 to 15 minutes. The requirements are: the sheath should not crack and there should be no mixed or broken wires.

[0063] 6 Low temperature bending test: refer to the test method of Article 4.5.20 of GJB1916-1994, wrap the sample around a cylinder with a radius equal to 8 times the outer diameter of the cable, and put it in a low temperature test box at (-40±2)℃ for 4h;

[0064] After the test, place it at room temperature for 10 to 15 minutes. The requirements are: the sheath should not crack and there should be no mixed or broken wires.

[0065] 7 Salt spray test: GJB4.11-1983 Environmental test for electronic equipment - Salt spray test requirements: The sheath should not crack and there should be no mixed or broken wires.

[0066] The cable core provided by the utility model is soft, the cable has excellent heat resistance, bending resistance and tensile resistance, and also ensures the watertightness of the cable.

[0067] The above is a detailed introduction to the shallow sea detection watertight cable provided by the utility model; for general manufacturers in this field, according to the ideas and principles of the embodiments of the utility model, there will be changes in the specific implementation methods and application scope; therefore, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. A shallow sea detection watertight cable, characterized in that: The shallow sea detection watertight cable comprises a tensile unit (3) and a composite signal line layer, a wrapping layer (5), a shielded signal line layer, a watertight filling layer (4), an inner sheath layer (6), an armor layer (7), and an outer sheath layer (8) which are sequentially arranged outside the tensile unit from the inside to the outside. The composite signal line layer comprises a plurality of power lines (2) and a plurality of shielded signal line pairs (1) which are sequentially arranged at intervals along a circumferential direction; The shielded signal line layer includes a plurality of shielded signal line pairs arranged in sequence along the circumferential direction; The shielded signal wire pair comprises two signal wires (1-1) and two ground wires (1-2) which are sequentially coated with an aluminum-plastic tape wrapping layer and a tinned copper wire braided shielding layer from the inside to the outside; The signal wire and the ground wire both include a conductor and an insulating layer covering the outside of the conductor; the conductor is formed by twisting a plurality of tinned copper wires, and the insulating layer is a cross-linked polyolefin extrusion layer.

2. The shallow sea detection watertight cable according to claim 1, characterized in that: The power cord comprises a conductor and an insulating layer covering the outside of the conductor; the conductor is formed by twisting a plurality of tinned copper wires, and the insulating layer is a cross-linked polyethylene insulating layer.

3. The shallow sea detection watertight cable according to claim 2, characterized in that: The tensile unit is a plurality of water-blocking aramid rods arranged in parallel to each other in a column shape.

4. The shallow sea detection watertight cable according to claim 3, characterized in that: The fiber fineness of the water-blocking aramid rod is 6320 dtex.

5. The shallow sea detection watertight cable according to claim 4, characterized in that: The wrapping layer is a cabling tape wrapping layer, which is used to ensure the roundness of the cabling.

6. The shallow sea detection watertight cable according to claim 5, characterized in that: The watertight filling layer is a water-blocking glue, which is filled in the cable gaps, outside the braided shielding and at the steel wire armor layer to ensure that the cable can be longitudinally water-blocked.

7. The shallow sea detection watertight cable according to claim 6, characterized in that: The inner sheath layer is a chlorosulfonated polyethylene layer, which serves as an inner cushion layer of the armor layer.

8. The shallow sea detection watertight cable according to claim 7, characterized in that: The armor layer is a galvanized steel wire braided layer, which is used to increase the strength of the cable.

9. The shallow sea detection watertight cable according to claim 8, characterized in that: The outer sheath layer is a chlorosulfonated polyethylene layer, which is used to protect the cable.

Images