High-temperature-resistant polyvinyl chloride insulated cable

Abstract

The utility model discloses a high-temperature-resistant polyvinyl chloride insulated cable, relates to the technical field of polyvinyl chloride insulated cable structures, and aims to solve the problem that the polyvinyl chloride insulated cable is affected when working in a high-temperature environment due to the fact that the high-temperature resistance of the existing polyvinyl chloride insulated cable is not ideal. The cable core comprises a wire core and a filling layer, the filling layer is filled in a gap between the wire core and the filling layer, a belting layer is arranged outside the cable core, an outer shielding layer is arranged outside the belting layer, an outer high-temperature-resistant layer is arranged outside the outer shielding layer, an armor layer is arranged outside the outer high-temperature-resistant layer, and a sheath layer is arranged outside the armor layer. An outer sheath is arranged outside the armor layer, the outer high-temperature-resistant layer comprises a polyvinyl chloride sheath II, glass fiber filaments and a polyvinyl chloride sheath III, and the space between the polyvinyl chloride sheath II and the polyvinyl chloride sheath III is filled with the glass fiber filaments.

Description

Technical Field

[0001] This utility model relates to the technical field of polyvinyl chloride insulated cable structure, specifically a high-temperature resistant polyvinyl chloride insulated cable. Background Technology

[0002] Polyvinyl chloride (PVC) insulated cables are characterized by their simple structure, light weight, good heat resistance, strong load capacity, non-melting properties, chemical corrosion resistance, and high mechanical strength. PVC insulated cables are categorized into unsheathed cables for fixed wiring, sheathed cables for fixed wiring, lightweight unsheathed flexible cables, sheathed flexible cables for general use, installation wires and shielded wires, special-purpose sheathed flexible cables, and PVC insulated flame-retardant / fire-resistant cables, among other products.

[0003] A search revealed that authorization announcement number CN201927407U discloses a flame-retardant, high-temperature resistant, fire-resistant polyvinyl chloride (PVC) insulated cable. This cable comprises a conductor core, a fire-resistant mica tape, a high-temperature resistant insulation layer, and a flame-retardant PVC sheath. The fire-resistant mica tape wraps around the conductor core, the high-temperature resistant insulation layer wraps around the fire-resistant mica tape, and the flame-retardant PVC sheath wraps around the high-temperature resistant insulation layer. This utility model exhibits high temperature resistance, strong fire resistance, safety, and durability. During combustion, the carbonization height, smoke density, and smoke toxicity meet the standards for combustion performance in public places and do not pollute the environment.

[0004] However, the existing PVC insulated cables do not have ideal high-temperature resistance, which affects their operation in high-temperature environments. Therefore, there is an urgent need in the market for a high-temperature resistant PVC insulated cable to solve these problems. Utility Model Content

[0005] The purpose of this invention is to provide a high-temperature resistant polyvinyl chloride (PVC) insulated cable to solve the problem mentioned in the background art that the existing PVC insulated cables have unsatisfactory high-temperature resistance, which affects the operation of PVC insulated cables in high-temperature environments.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-temperature resistant polyvinyl chloride insulated cable, comprising a cable core, the cable core comprising a conductor and a filler layer, the gap between the conductor and the cable core being filled with the filler layer, a wrapping layer being disposed outside the cable core, an outer shielding layer being disposed outside the wrapping layer, an outer high-temperature resistant layer being disposed outside the outer shielding layer, an armor layer being disposed outside the outer high-temperature resistant layer, and an outer sheath being disposed outside the armor layer.

[0007] Preferably, the filling layer is nylon rope.

[0008] Preferably, the wire core includes a conductor, an inner shielding layer, an inner high-temperature resistant layer, and an insulating layer. The conductor is wound with the inner shielding layer, the inner high-temperature resistant layer is wrapped around the outer wall of the inner shielding layer by an extrusion process, and the inner high-temperature resistant layer is extruded with an insulating layer. The conductor is made of several copper wires wound and braided together.

[0009] Preferably, the inner high-temperature resistant layer includes a polyvinyl chloride sheath and a high-temperature resistant coating layer. The outer wall of the polyvinyl chloride sheath has a plurality of grooves, which are evenly distributed inside the outer wall of the polyvinyl chloride sheath. The high-temperature resistant coating layer is made of silicone high-temperature resistant coating, and the thickness of the silicone high-temperature resistant coating is 1-1.5 mm.

[0010] Preferably, the wrapping layer includes a mica tape and a fire-retardant coating layer, wherein the mica tape is provided with a fire-retardant coating layer, the fire-retardant coating layer is made of chlorinated polyvinyl chloride resin, and the thickness of the fire-retardant coating layer is 0.5-1mm.

[0011] Preferably, the outer high-temperature resistant layer comprises a second PVC sheath, glass fiber filaments, and a third PVC sheath. Glass fiber filaments are filled between the second and third PVC sheaths. Glass fiber filaments are wound around the outer wall of the second PVC sheath. The third PVC sheath is wrapped around the outer wall of the glass fiber filaments by an extrusion process.

[0012] Preferably, the inner shielding layer is made of several metal wires woven together, and the outer shielding layer is made of metal strips wrapped around it.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This type of high-temperature resistant PVC insulated cable has an outer high-temperature resistant layer outside the outer shielding layer. The outer high-temperature resistant layer is composed of a second PVC sheath, glass fiber filaments, and a third PVC sheath. The glass fiber filaments inside the second and third PVC sheaths further improve the high-temperature resistance of the outer high-temperature resistant layer.

[0015] This type of high-temperature resistant PVC insulated cable has an inner high-temperature resistant layer on the outside of the conductor core. By spraying a 1-1.5mm thick coating onto the outside of the PVC sheath, the inner high-temperature resistant layer has a good high-temperature resistance effect, thus improving the high-temperature resistance of the conductor core. At the same time, the wrapping layer consists of a mica tape and a fire-retardant coating layer. By applying a fire-retardant coating layer to the outside of the mica tape, the mica tape has excellent fire-retardant and high-temperature resistance properties, thereby giving this type of PVC insulated cable higher fire-retardant and high-temperature resistance performance. Attached Figure Description

[0016] Figure 1 This is an overall sectional view of the present invention;

[0017] Figure 2 This is a schematic diagram of the inner high-temperature resistant layer structure of this utility model;

[0018] Figure 3 This is a cross-sectional view of the outer high-temperature resistant layer of this utility model;

[0019] Figure 4 This is a schematic diagram of the wrapping layer structure of this utility model.

[0020] In the diagram: 1. Cable core; 2. Wire core; 3. Conductor; 4. Inner shielding layer; 5. Inner high-temperature resistant layer; 6. Insulation layer; 7. Filler layer; 8. Wrapping tape layer; 9. Outer shielding layer; 10. Outer high-temperature resistant layer; 11. PVC sheath one; 1101. Groove hole; 12. High-temperature resistant coating layer; 13. PVC sheath two; 14. Fiberglass filament; 15. PVC sheath three; 16. Mica tape; 17. Fire-retardant coating layer; 18. Armoring layer; 19. Outer sheath. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Please see Figure 1-4 This utility model provides an embodiment of a high-temperature resistant polyvinyl chloride insulated cable, comprising a cable core 1, the cable core 1 comprising a conductor core 2 and a filling layer 7, the gap between the conductor core 2 and the cable core 1 being filled with the filling layer 7, the cable core 1 being provided with a wrapping layer 8, the wrapping layer 8 being provided with an outer shielding layer 9, the outer shielding layer 9 being provided with an outer high-temperature resistant layer 10, the outer high-temperature resistant layer 10 being provided with an armor layer 18, and the armor layer 18 being provided with an outer sheath 19. It should be noted that, in order to save space and highlight the innovative elements of this patent, such as how the cable is manufactured and processed, it will not be described in detail in this patent.

[0023] In use, the core 2 is provided with an inner high-temperature resistant layer 5, which has a good high-temperature resistance effect, thus making the core 2 more resistant to high temperatures. At the same time, the wrapping layer 8 is composed of mica tape 16 and fire-retardant coating layer 17. By applying fire-retardant coating layer 17 to the outside of mica tape 16, mica tape 16 can have good fire-retardant and high-temperature resistance performance. The outer shielding layer 9 is provided with an outer high-temperature resistant layer 10, which is composed of polyvinyl chloride sheath 2 13, glass fiber filaments 14 and polyvinyl chloride sheath 3 15. The high-temperature resistant polyvinyl chloride sheath 2 13 and polyvinyl chloride sheath 3 are filled with glass fiber filaments 14, which can further improve the high-temperature resistance performance of the outer high-temperature resistant layer 10.

[0024] Please see Figure 1 The filler layer 7 is made of nylon rope. By setting the nylon rope filler layer 7, the polyvinyl chloride insulated cable can have good heat resistance.

[0025] Please see Figure 1 The core 2 includes a conductor 3, an inner shielding layer 4, an inner high-temperature resistant layer 5, and an insulation layer 6. The conductor 3 is wrapped with the inner shielding layer 4. The inner high-temperature resistant layer 5 is wrapped on the outer wall of the inner shielding layer 4 by an extrusion process. The insulation layer 6 is extruded on the outer side of the inner high-temperature resistant layer 5. The conductor 3 is made of several copper wires wound and braided. The conductor 3 has better heat resistance by being made of several copper wires wound and braided.

[0026] Please see Figure 2 The inner high-temperature resistant layer 5 includes a polyvinyl chloride sheath 11 and a high-temperature resistant coating layer 12. The inner wall of the polyvinyl chloride sheath 11 has several grooves 1101, which are evenly distributed inside the outer wall of the polyvinyl chloride sheath 11. The high-temperature resistant coating layer 12 is made of silicone high-temperature resistant coating with a thickness of 1-1.5 mm. The polyvinyl chloride sheath 11 has good heat resistance. By spraying the silicone high-temperature resistant coating on the outside of the polyvinyl chloride sheath 11, the polyvinyl chloride sheath 11 can have a better high-temperature resistance effect, thereby giving the core 2 good high-temperature resistance.

[0027] Please see Figure 4 The wrapping layer 8 includes a mica tape 16 and a fire-retardant coating layer 17. The fire-retardant coating layer 17 is provided on the outside of the mica tape 16. The fire-retardant coating layer 17 is made of chlorinated polyvinyl chloride resin and has a thickness of 0.5-1mm. The mica tape 16 has excellent high-temperature resistance. By applying chlorinated polyvinyl chloride resin to the outside of the mica tape 16, the fire resistance and high-temperature resistance of the mica tape 16 can be improved.

[0028] Please see Figure 3 The outer high-temperature resistant layer 10 includes a second PVC sheath 13, glass fiber filaments 14, and a third PVC sheath 15. Glass fiber filaments 14 are filled between the second PVC sheath 13 and the third PVC sheath 15. Glass fiber filaments 14 are wound around the outer wall of the second PVC sheath 13. The third PVC sheath 15 is wrapped around the outer wall of the glass fiber filaments 14 by an extrusion process. The second PVC sheath 13 and the third PVC sheath 15 enable the PVC insulated cable to have good high-temperature resistance. The addition of glass fiber filaments 14 further improves the high-temperature resistance of the PVC insulated cable.

[0029] Please see Figure 1The inner shielding layer 4 is made of several metal wires woven together, and the outer shielding layer 9 is made of metal strips wrapped around it. This arrangement enables the polyvinyl chloride insulated cable to have a good shielding effect.

[0030] Working principle: During use, the conductor core 2 is provided with an inner high-temperature resistant layer 5. By spraying a 1-1.5mm thick coating on the outside of the PVC sheath 11, the inner high-temperature resistant layer 5 has a good high-temperature resistance effect, thus improving the high-temperature resistance of the conductor core 2. At the same time, the wrapping layer 8 consists of a mica tape 16 and a fire-retardant coating layer 17. By applying the fire-retardant coating layer 17 to the outside of the mica tape 16, the mica tape 16 has a good fire-retardant and high-temperature resistance performance, thus giving this type of PVC insulated cable a higher fire-retardant and high-temperature resistance performance. The outer shielding layer 9 is provided with an outer high-temperature resistant layer 10, which consists of a second PVC sheath 13, glass fiber filaments 14, and a third PVC sheath 15. The glass fiber filaments 14 inside the second and third high-temperature resistant PVC sheaths further improve the high-temperature resistance performance of the outer high-temperature resistant layer 10.

[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A high-temperature resistant polyvinyl chloride insulated cable, comprising a cable core (1), characterized in that: The cable core (1) includes a conductor (2) and a filling layer (7). The gap between the conductor (2) and the cable core (1) is filled with the filling layer (7). The cable core (1) is surrounded by a wrapping layer (8). The wrapping layer (8) is surrounded by an outer shielding layer (9). The outer shielding layer (9) is surrounded by an outer high-temperature resistant layer (10). The outer high-temperature resistant layer (10) is surrounded by an armor layer (18). The armor layer (18) is surrounded by an outer sheath (19). The conductor (2) includes a conductor (3), an inner shielding layer (4), and an inner... The conductor (3) is surrounded by an inner shielding layer (4) and an insulating layer (6). The inner high-temperature resistant layer (5) is wrapped around the outer wall of the inner shielding layer (4) by an extrusion process. An insulating layer (6) is extruded around the outer wall of the inner high-temperature resistant layer (5). The conductor (3) is made of several copper wires wound and woven together. The inner high-temperature resistant layer (5) includes a polyvinyl chloride sheath (11) and a high-temperature resistant coating layer (12). The inner wall of the polyvinyl chloride sheath (11) has a groove hole (1101). 101) Several grooves (1101) are evenly distributed inside the outer wall of the polyvinyl chloride sheath (11). The high-temperature resistant coating layer (12) is made of silicone high-temperature resistant coating. The silicone high-temperature resistant coating is applied by spraying. The thickness of the silicone high-temperature resistant coating is 1-1.5 mm. The wrapping layer (8) includes a mica tape (16) and a fireproof coating layer (17). The mica tape (16) is provided with a fireproof coating layer (17). The fireproof coating layer (17) is made of chlorinated polyvinyl chloride resin. The thickness of the material layer (17) is 0.5-1mm. The chlorinated polyvinyl chloride resin is sprayed by a spraying process. The outer high temperature resistant layer (10) includes a second PVC sheath (13), glass fiber filaments (14) and a third PVC sheath (15). Glass fiber filaments (14) are filled between the second PVC sheath (13) and the third PVC sheath (15). Glass fiber filaments (14) are wound around the outer wall of the second PVC sheath (13). The third PVC sheath (15) is wrapped around the outer wall of the glass fiber filaments (14) by an extrusion process.

2. The high-temperature resistant polyvinyl chloride insulated cable according to claim 1, characterized in that: The filling layer (7) is a nylon rope.

3. The high-temperature resistant polyvinyl chloride insulated cable according to claim 1, characterized in that: The inner shielding layer (4) is made of several metal wires woven together, and the outer shielding layer (9) is made of metal strips wrapped around it.

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