CN202120676U - High-temperature-resistant shielding type compensating cable - Google Patents

Abstract

The utility model discloses a high-temperature-resistant shielding compensation cable, which includes a conductor, an insulating layer, a filling layer, a cable core tape layer, a cable core shielding layer, and an outer protective layer in a wrapping manner from the inside to the outside, and is characterized in that: A glass fiber braiding layer, a core tape layer and a wire group shielding layer are arranged between the insulating layer and the filling layer, the insulating layer is wrapped with a glass fiber braiding layer, and the glass fiber braiding layer is wrapped with a wire core tape layer , the core tape layer is wrapped with a wire group shielding layer, an inner lining layer and an armor layer are arranged between the cable core shielding layer and the outer sheathing layer, the cable core shielding layer is wrapped with an inner lining layer, and the inner lining layer is outer Wrapped with armor. The utility model has the characteristics of good high temperature resistance and good shielding performance.

Description

High temperature resistant shielded compensation cable

technical field

The utility model relates to a cable, in particular to a high-temperature-resistant shielded compensation cable used in high-temperature occasions such as steelmaking, petroleum, chemical industry, and smelting.

Background technique

The compensation cable uses imported high-quality fluoroplastics for its insulating layer and sheath, and adopts a new process of integral continuous extrusion. It has excellent properties of acid resistance, alkali resistance, wear resistance and non-combustibility, and can be immersed in oil and water for long-term use. The operating temperature of the compensation cable is -60-260°C, which belongs to the contemporary international advanced level. Among them, the thermocouple compensation cable is suitable for multi-point connection of automatic temperature measuring instruments in electric power, metallurgy, petroleum, chemical industry, textile and other industries, as well as in national defense, scientific research and other departments.

In high-temperature occasions such as steelmaking, petroleum, chemical industry, and smelting, the ambient temperature is quite high and can reach 500°C to 800°C. The compensation cables used in these occasions for the connection between the extension thermocouple and the automatic temperature measuring instrument also need to meet the above requirements. Long-term operation under high temperature conditions; the current national standard GB/T 4989-1994 for compensation cables stipulates that fluoropolymer insulated glass fiber braided sheaths should be used for high temperature resistant occasions. It will gradually melt and cannot meet the above-mentioned high-temperature application requirements. If you insist on using it in the above occasions, the insulation and sheath materials will age very quickly, which will seriously reduce the service life of the cable and affect the safety of the cable.

The Chinese patent document with the publication number CN 201773613U and the publication date of 2011.03.23 discloses a high-temperature-resistant shielded control cable, including a control cable conductive core, characterized in that: the control cable conductive core is extruded with an insulating layer become an insulated wire core, the insulated wire core is stranded to form a cable core, the gap in the cable core is filled with a filling layer, and the outside of the cable core is sequentially wound concentrically with a tape layer, a composite shielding inner layer, and a composite shielding outer layer and sheath layer. This technical solution still has the following disadvantages: the high temperature resistant fluoroplastic insulation layer cannot meet the adaptability to the ambient temperature, especially when it involves steelmaking, petroleum, chemical industry, smelting, etc., as high as 500 ℃ ~ 800 ℃, because Its temperature resistance grade is only about 200°C, and it will gradually melt when the temperature reaches 350°C, and the aging speed of the insulating layer is fast, which affects the service life of the cable. The sheath layer is also made of fluorine plastic, which also ages quickly at high temperatures of 500°C to 800°C, which seriously reduces the service life of the cable and affects the safety of the cable.

Contents of the invention

The purpose of the utility model is to overcome the defects of the above-mentioned prior art and provide a high temperature resistant shielded compensation cable. The utility model has the characteristics of good high temperature resistance and good shielding performance.

In order to realize the foregoing invention object, the technical scheme that the utility model adopts is as follows:

The high temperature resistant shielded compensation cable includes a conductor, an insulating layer, a filling layer, a cable core tape layer, a cable core shielding layer, and an outer sheath from the inside to the outside, and is characterized in that: the insulation layer and the filling layer There is a glass fiber braiding layer, a wire core tape layer and a wire group shielding layer, the insulating layer is wrapped with a glass fiber braided layer, the glass fiber braided layer is wrapped with a wire core tape layer, and the wire core tape layer is wrapped The wire group shielding layer is wrapped, and an inner lining layer and an armor layer are arranged between the cable core shielding layer and the outer sheath layer, the inner lining layer is wrapped outside the cable core shielding layer, and the armor layer is wrapped outside the inner lining layer.

The inner lining layer is a double-layer structure, including an inner layer of mica tape and an outer layer of glass fiber cloth.

The core tape layer is made of glass fiber tape.

The shielding layer of the wire group adopts tinned copper wire.

The armor layer adopts galvanized steel wire.

The insulating layer adopts mica tape.

The outer sheath is glass fiber filaments.

The main core of the utility model, which is composed of a conductor, an insulating layer, and a glass fiber braided layer, is a single core or multiple cores, and the arrangement of the multiple cores is single-layer or multi-layer concentric twisting.

The thickness of the insulation layer described in the utility model is 0.3-0.4mm, and the thickness of the glass fiber braided layer is 0.2-0.3mm.

The advantages of the utility model are embodied in the following aspects:

1. The glass fiber braided layer is wrapped outside the insulating layer to ensure the insulation, flame retardancy, high temperature resistance and fire resistance of the compensation cable used in high temperature occasions. Compared with ordinary compensation cables, it has better high temperature resistance. The test The condition is 800℃±20℃, and the operation is in good condition.

2. The shielding layer is made of tinned copper wire. When the frequency of the interference electromagnetic field is high, the eddy current generated by the shielding layer can be used to offset the external electromagnetic wave, so as to achieve the shielding effect; the shielding layer of the wire group can effectively shield each Mutual interference between wire groups during compensation signal transmission ensures the accuracy of signal transmission for each pair of wire groups.

3. Wrapping the wire core tape layer outside the glass fiber braiding layer can prevent the shielding layer from damaging the insulated wire core and effectively protect the conductor and the insulation layer.

4. The armor layer is made of galvanized steel wire with high magnetic permeability and other materials. In addition to the tensile effect, when the frequency of interfering electromagnetic waves is low, the core-plated steel wire braid can also limit the magnetic force lines inside the shield to prevent diffusion. Go to the shielded space.

5. The inner lining is a double-layer structure, including the inner mica tape and the outer glass fiber cloth, which greatly improves the flame retardancy and high temperature resistance of the cable, thereby improving the safety and service life of the cable.

Description of drawings

Fig. 1 is the cross-sectional structure schematic diagram of the utility model

Fig. 2 is the schematic diagram of the section structure of the inner liner of the present invention

Marks in the figure: 1. Conductor, 2. Insulation layer, 3. Filling layer, 4. Cable core tape layer, 5. Cable core shielding layer, 6. Outer sheath layer, 7. Glass fiber braided layer, 8. Wire Core clad tape layer, 9, wire group shielding layer, 10, inner lining layer, 11, armor layer, 12, mica tape, 13, glass fiber cloth.

Detailed ways

Example 1

The high temperature resistant shielded compensation cable includes a conductor 1, an insulating layer 2, a filling layer 3, a cable core tape layer 4, a cable core shielding layer 5, and an outer sheath 6 from the inside to the outside. A glass fiber braiding layer 7, a wire core tape layer 8 and a wire group shielding layer 9 are arranged between the filling layers 3, the insulating layer 2 is wrapped with a glass fiber braiding layer 7, and the glass fiber braiding layer 7 is wrapped with a wire core The tape layer 8, the core tape layer 8 is wrapped with a wire group shielding layer 9, an inner liner 10 and an armor layer 11 are arranged between the cable core shielding layer 5 and the outer sheath 6, and the cable core shielding layer 5 An inner lining layer 10 is wrapped on the outside, and an armor layer 11 is wrapped on the inner lining layer 10 . The inner liner 10 is a double-layer structure, including an inner mica tape 12 and an outer glass fiber cloth 13 . The core tape layer 8 is made of glass fiber tape. The wire group shielding layer 9 adopts tinned copper wire. The armor layer 11 is made of galvanized steel wire. The insulating layer 2 adopts mica tape. The outer sheath 6 is glass fiber filaments. The main wire core composed of conductor 1, insulating layer 2 and glass fiber braiding layer 7 described in the utility model is a single core or multiple cores, and the arrangement of the multiple cores is single-layer or multi-layer concentric twisting. The thickness of the insulation layer 2 described in the utility model is 0.3mm, and the thickness of the glass fiber braided layer 7 is 0.2mm.

Example 2

The high temperature resistant shielded compensation cable includes a conductor 1, an insulating layer 2, a filling layer 3, a cable core tape layer 4, a cable core shielding layer 5, and an outer sheath 6 from the inside to the outside. A glass fiber braiding layer 7, a wire core tape layer 8 and a wire group shielding layer 9 are arranged between the filling layers 3, the insulating layer 2 is wrapped with a glass fiber braiding layer 7, and the glass fiber braiding layer 7 is wrapped with a wire core The tape layer 8, the core tape layer 8 is wrapped with a wire group shielding layer 9, an inner liner 10 and an armor layer 11 are arranged between the cable core shielding layer 5 and the outer sheath 6, and the cable core shielding layer 5 An inner lining layer 10 is wrapped on the outside, and an armor layer 11 is wrapped on the inner lining layer 10 . The inner liner 10 is a double-layer structure, including an inner mica tape 12 and an outer glass fiber cloth 13 . The core tape layer 8 is made of glass fiber tape. The wire group shielding layer 9 adopts tinned copper wire. The armor layer 11 is made of galvanized steel wire. The insulating layer 2 adopts mica tape. The outer sheath 6 is glass fiber filaments. The main wire core composed of conductor 1, insulating layer 2 and glass fiber braiding layer 7 described in the utility model is a single core or multiple cores, and the arrangement of the multiple cores is single-layer or multi-layer concentric twisting. The thickness of the insulation layer 2 described in the utility model is 0.35mm, and the thickness of the glass fiber braided layer 7 is 0.26mm.

Example 3

The high temperature resistant shielded compensation cable includes a conductor 1, an insulating layer 2, a filling layer 3, a cable core tape layer 4, a cable core shielding layer 5, and an outer sheath 6 from the inside to the outside. A glass fiber braiding layer 7, a wire core tape layer 8 and a wire group shielding layer 9 are arranged between the filling layers 3, the insulating layer 2 is wrapped with a glass fiber braiding layer 7, and the glass fiber braiding layer 7 is wrapped with a wire core The tape layer 8, the core tape layer 8 is wrapped with a wire group shielding layer 9, an inner liner 10 and an armor layer 11 are arranged between the cable core shielding layer 5 and the outer sheath 6, and the cable core shielding layer 5 An inner lining layer 10 is wrapped on the outside, and an armor layer 11 is wrapped on the inner lining layer 10 . The inner liner 10 is a double-layer structure, including an inner mica tape 12 and an outer glass fiber cloth 13 . The core tape layer 8 is made of glass fiber tape. The wire group shielding layer 9 adopts tinned copper wire. The armor layer 11 is made of galvanized steel wire. The insulating layer 2 adopts mica tape. The outer sheath 6 is glass fiber filaments. The main wire core composed of conductor 1, insulating layer 2 and glass fiber braiding layer 7 described in the utility model is a single core or multiple cores, and the arrangement of the multiple cores is single-layer or multi-layer concentric twisting. The thickness of the insulating layer 2 described in the utility model is 0.4mm, and the thickness of the glass fiber braided layer 7 is 0.3mm.

The utility model is not limited to the above-mentioned embodiments, but all should fall within the protection scope of the claims of the utility model.

Claims (7)

1. High temperature resistant shielded compensation cable, including conductor (1), insulating layer (2), filling layer (3), cable core tape layer (4), and cable core shielding layer (5) from the inside to the outside . The outer sheath (6), characterized in that: a glass fiber braided layer (7), a wire core tape layer (8) and a wire group shield are arranged between the insulating layer (2) and the filling layer (3) layer (9), the insulating layer (2) is wrapped with a glass fiber braided layer (7), the glass fiber braided layer (7) is wrapped with a wire core tape layer (8), and the wire core tape layer (8) is The wire group shielding layer (9) is wrapped, the inner liner (10) and the armor layer (11) are arranged between the cable core shielding layer (5) and the outer sheath (6), and the cable core shielding layer (5) An inner lining layer (10) is wrapped outside, and an armor layer (11) is wrapped outside the inner lining layer (10). 2. The high temperature resistant shielded compensation cable according to claim 1, characterized in that: the inner lining layer (10) is a double-layer structure, including mica tape (12) in the inner layer and glass fiber cloth (13) in the outer layer ). 3. The high temperature resistant shielded compensation cable according to claim 1, characterized in that: the core tape layer (8) is made of glass fiber tape. 4. The high temperature resistant shielded compensation cable according to claim 1, characterized in that: the shielding layer (9) of the wire group is made of tinned copper wire. 5. The high temperature resistant shielded compensation cable according to claim 1, characterized in that: the armor layer (11) is made of galvanized steel wire. 6. The high temperature resistant shielded compensation cable according to claim 1, characterized in that: the insulating layer (2) is made of mica tape. 7. The high temperature resistant shielded compensation cable according to claim 1, characterized in that: the outer sheath (6) is glass fiber.

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