Structure-stable type total shielding combination cable for coal mine

Abstract

The utility model discloses a coal mine total shielding combination cable with a stable structure, which comprises coaxial video wire cores, telephone wire cores and signal wire cores which are arranged at intervals and are wrapped in a polyvinyl chloride wrapping layer together, and the polyvinyl chloride wrapping layer forms Y-shaped connecting ribs on interval sections among the coaxial video wire cores, the telephone wire cores and the signal wire cores. A polyester fiber plain woven fabric wrapping layer, an aluminum-plastic composite belt wrapping total shielding layer, a polyvinyl chloride inner sheath layer, a steel wire armor layer and a polyvinyl chloride outer sheath layer are sequentially wrapped outside the polyvinyl chloride wrapping layer, and a polyester staple fiber core strip is filled between the polyvinyl chloride wrapping layer and the polyester fiber plain woven fabric wrapping layer. The cable core structure of the combination cable is good in stability and high in mechanical strength, signal interference is not prone to occurring among the wire cores, signal transmission is more stable, and durability is better.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a structurally stable total shielding combined cable for coal mines. Background Art

[0002] Mining cables are cables used in mines with various voltage levels, electrical equipment, mining equipment, and mining machinery. Mining rubber sheathed cables are suitable for mobile laying cables for mining power units with rated power frequency voltage U0 / U 8.7 / 10KV and below. Mining communication cables are common mining cables, such as wireless communication systems, telephone communication trunks, video wiring, and user lines in coal mines. However, after the telephone lines, video lines, signal lines, etc. are combined and twisted into cables, multiple twisted pairs of cores and video lines are directly twisted, the cable core structure has poor stability, weak mechanical strength, and is prone to core and wire breakage. There is a certain degree of mutual interference between the conductor loops, the signal transmission characteristics are unstable, and the durability is poor. Utility Model Content

[0003] The utility model aims at the deficiencies of the prior art and aims to solve the technical problem of providing a structurally stable total shielded combined cable for coal mines. The cable core has good structural stability, high mechanical strength, and is less likely to cause signal interference between the cores, so that signal transmission is more stable and the durability is better.

[0004] The utility model solves the above technical problems through the following technical solutions.

[0005] A structurally stable total shielded composite cable for use in coal mines comprises coaxial video cores, telephone cores and signal cores arranged at intervals and coated together in a polyvinyl chloride coating, wherein the polyvinyl chloride coating is provided with Y-shaped connecting ribs on the interval sections between the coaxial video cores, telephone cores and signal cores, the outside of the polyvinyl chloride coating is coated with a polyester fiber plain woven cloth wrapping layer, an aluminum-plastic composite tape wrapping total shielding layer, a polyvinyl chloride inner sheath layer, a steel wire armor layer and a polyvinyl chloride outer sheath layer in sequence, and a polyester staple fiber core strip is filled between the polyvinyl chloride coating layer and the polyester fiber plain woven cloth wrapping layer.

[0006] Preferably, the coaxial video cable core comprises a central conductor, a foamed polyethylene extruded insulation layer, a polyethylene wrapped insulation layer, an aluminum-plastic composite tape wrapped sub-shielding layer and a copper wire wrapped shielding layer.

[0007] Preferably, the central conductor is formed by concentrically twisting a number of tinned copper monofilaments with a wire diameter of 0.05 mm to 0.08 mm.

[0008] Preferably, the copper wire wrapped shielding layer is formed by mixed unidirectional spiral winding of two tinned copper wires of different wire diameters with a wire diameter ratio between 0.9 and 1, and the shielding density is 90% to 95%.

[0009] Preferably, the telephone wire core comprises two twisted pairs of wires and two polyester staple fiber filling cores twisted together.

[0010] Preferably, the signal wire core comprises four twisted wire cores which are arranged circumferentially at 90 degrees apart from each other through a cross-shaped isolation core frame and are jointly coated with an ETFE resin sheath.

[0011] Preferably, the four twisted wire cores have the same twist directions, and the four twisted wire cores have different twist lengths.

[0012] Preferably, the cross-shaped isolation core frame comprises a cross-shaped resin core frame body and an aluminum foil shielding layer coated on the outside of the cross-shaped resin core frame body.

[0013] Preferably, the aluminum-plastic composite tape wrapped total shielding layer is an aluminum-plastic composite tape unidirectional spiral overlapping wrapped structure, and the aluminum-plastic composite tape comprises an aluminum foil outer layer and a PET film inner layer.

[0014] Preferably, the steel wire armor layer is coated with insulating lubricating silicone grease.

[0015] Beneficial effects of the utility model:

[0016] 1. The coaxial video core, telephone core and signal core are arranged at intervals through the Y-shaped connecting ribs of the polyvinyl chloride sheath to form a triangular stable structure, and a polyester staple fiber core strip is added and then coated with a polyester fiber plain woven cloth to ensure the circular cross-sectional structure of the cable core. The polyester staple fiber core strip can reduce lateral pressure and extrusion pressure, improve flexibility and mechanical strength, and improve the cable core structure stability. An effective electrical insulation spacing distance is maintained between each core, signal interference is not easy to occur, and signal transmission is more stable. A steel wire armor layer is added between the inner and outer sheaths, and insulating lubricating silicone grease is coated to reduce the stress concentration of the armor layer, while improving mechanical strength and flexibility, and better durability.

[0017] 2. The signal line core is evenly spaced around the four twisted cores by adding a cross-shaped isolation core frame. The structure is balanced and stable, and each pair of twisted cores is evenly stressed, which suppresses the occurrence of wire and core breakage. Each pair of twisted cores maintains an electrical spacing and is shielded from each other by an aluminum foil shielding layer, which effectively suppresses signal crosstalk, stabilizes signal transmission performance, and improves durability.

[0018] 3. The coaxial video cable core adopts an aluminum-plastic composite tape wrapped shielding layer and a copper wire wrapped shielding layer to form a double-layer shielding, which greatly enhances the shielding effect, reduces signal attenuation, has stronger anti-interference ability, improves video signal transmission effect, and has better durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0020] Figure 1 It is a schematic diagram of the cross-sectional structure of an embodiment of the present application.

[0021] Figure markings: 1-coaxial video core, 2-telephone core, 3-signal core, 4-polyvinyl chloride coating, 5-Y-shaped connecting ribs, 6-polyester fiber plain woven cloth wrapping layer, 7-aluminum-plastic composite tape wrapping total shielding layer, 8-polyvinyl chloride inner sheath layer, 9-steel wire armor layer, 10-polyvinyl chloride outer sheath layer, 11-polyester staple fiber core strip, 12-center conductor, 13-foamed polyethylene extruded insulation layer, 14-polyethylene wrapping insulation layer, 15-aluminum-plastic composite tape wrapping sub-shielding layer, 16-copper wire wrapping shielding layer, 17-twisted pair, 18-polyester staple fiber filling core, 19-twisted pair core, 20-cross-shaped isolation core frame, 21-ETFE resin wrapping layer. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figure 1As shown, the structure-stable total shielded combined cable for coal mines of the utility model embodiment comprises a coaxial video core 1, a telephone core 2 and a signal core 3 arranged at intervals and coated together in a polyvinyl chloride coating 4, wherein the polyvinyl chloride coating 4 forms a Y-shaped connecting rib 5 on the interval section between the coaxial video core 1, the telephone core 2 and the signal core 3. In one embodiment, the coaxial video core 1 comprises a central conductor 12, a foamed polyethylene extruded insulation layer 13, a polyethylene wrapped insulation layer 14, an aluminum-plastic composite tape wrapped shielding layer 15 and a copper wire wrapped shielding layer 16, and further, the copper wire wrapped shielding layer 16 is composed of two tinned copper wires of different wire diameters and a wire diameter ratio between 0.9 and 1 mixed unidirectional spiral winding, and the shielding density is 90% to 95%. Specifically, the central conductor 12 is formed by concentric twisting of a plurality of tinned copper monofilaments with a wire diameter of 0.05 mm to 0.08 mm. In one embodiment, the telephone wire core 2 includes two twisted pairs 17 and two polyester staple fiber filling cores 18 twisted together. In one embodiment, the signal wire core 3 includes four twisted wire cores 19 which are arranged 90 degrees apart from each other in the circumferential direction through a cross-shaped isolation core frame 20 and are jointly coated with an ETFE resin wrapping layer 21. Furthermore, the four twisted wire cores 19 have the same twist direction, and the four twisted wire cores 19 have different twist pitches. The cross-shaped isolation core frame 20 includes a cross-shaped resin core frame body and an aluminum foil shielding layer coated on the outside of the cross-shaped resin core frame body.

[0024] The outside of the polyvinyl chloride coating layer 4 is sequentially coated with a polyester fiber plain woven cloth wrapping layer 6, an aluminum-plastic composite tape wrapping total shielding layer 7, a polyvinyl chloride inner sheath layer 8, a steel wire armor layer 9 and a polyvinyl chloride outer sheath layer 10, and a polyester short fiber core strip 11 is filled between the polyvinyl chloride coating layer 4 and the polyester fiber plain woven cloth wrapping layer 6. Furthermore, the steel wire armor layer 9 is coated with insulating lubricating silicone grease. In one embodiment, the aluminum-plastic composite tape wrapping total shielding layer 7 is an aluminum-plastic composite tape unidirectional spiral lap wrapping structure, and the aluminum-plastic composite tape includes an aluminum foil outer layer and a PET film inner layer.

[0025] The above are only specific implementations of the present application, but the protection scope of the application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. The structurally stable overall shielded combined cable for coal mines is characterized by: The invention comprises a coaxial video core (1), a telephone core (2) and a signal core (3) which are arranged at intervals and are coated together in a polyvinyl chloride coating layer (4); the polyvinyl chloride coating layer (4) is provided with a Y-shaped connecting rib (5) on the interval section between the coaxial video core (1), the telephone core (2) and the signal core (3); the polyvinyl chloride coating layer (4) is coated with a polyester fiber plain woven cloth wrapping layer (6), an aluminum-plastic composite tape wrapping overall shielding layer (7), a polyvinyl chloride inner sheath layer (8), a steel wire armor layer (9) and a polyvinyl chloride outer sheath layer (10) in sequence on the outside; and a polyester staple fiber core strip (11) is filled between the polyvinyl chloride coating layer (4) and the polyester fiber plain woven cloth wrapping layer (6).

2. The structurally stable overall shielded combined cable for coal mines according to claim 1 is characterized by: The coaxial video cable core (1) comprises a central conductor (12), a foamed polyethylene extruded insulation layer (13), a polyethylene wrapped insulation layer (14), an aluminum-plastic composite tape wrapped shielding layer (15) and a copper wire wrapped shielding layer (16).

3. The structurally stable overall shielded combined cable for coal mines according to claim 2 is characterized by: The central conductor (12) is formed by concentrically twisting a number of tinned copper monofilaments with a wire diameter of 0.05 mm to 0.08 mm.

4. The structure-stable overall shielded combined cable for coal mines according to claim 2 is characterized by: The copper wire wrapped shielding layer (16) is formed by mixing unidirectional spiral winding of two tinned copper wires of different wire diameters with a wire diameter ratio between 0.9 and 1, and the shielding density is 90% to 95%.

5. The structure-stable overall shielded combined cable for coal mines according to claim 1 is characterized by: The telephone wire core (2) comprises two twisted pairs (17) and two polyester staple fiber filling cores (18) twisted together.

6. The structurally stable overall shielded combined cable for coal mines according to claim 1 is characterized by: The signal wire core (3) comprises four twisted wire cores (19) which are arranged circumferentially at 90 degrees apart from each other through a cross-shaped isolation core frame (20) and are jointly coated with an ETFE resin wrapping layer (21).

7. The structure-stable overall shielded combined cable for coal mines according to claim 6 is characterized by: The four twisted wire cores (19) have the same twist direction, and the four twisted wire cores (19) have different twist lengths.

8. The structure-stable overall shielded combined cable for coal mines according to claim 6 is characterized by: The cross-shaped isolation core frame (20) comprises a cross-shaped resin core frame body and an aluminum foil shielding layer coated on the outside of the cross-shaped resin core frame body.

9. The structure-stable overall shielded combined cable for coal mines according to claim 1 is characterized by: The aluminum-plastic composite tape wrapped total shielding layer (7) is an aluminum-plastic composite tape unidirectional spiral overlapping wrapped structure, and the aluminum-plastic composite tape comprises an aluminum foil outer layer and a PET film inner layer.

10. The structure-stable overall shielded combined cable for coal mines according to claim 1 is characterized by: The steel wire armor layer (9) is coated with insulating lubricating silicone grease.

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