Special cable and film spraying method thereof

Abstract

The invention discloses a special cable and a film layer spraying method thereof, belongs to the technical field of cables, and solves the problem that an insulating layer and a shielding layer on the outer side are damaged due to excessive bending deformation of a conductor when the cable is bent at a large angle. And even, the problem of damage caused by friction with other conductors due to bending deformation can be solved. Comprising a main cable, a plurality of auxiliary cables, a filling film layer, a dense protection layer, an alloy lead layer and a polypropylene sheath layer, wherein the auxiliary cables are arranged on the outer ring of the main cable in parallel; the filling film layer wraps the main cable and the auxiliary cables; the dense protection layer wraps the outer ring of the filling film layer; according to the invention, the main cable is used for bearing the function of a reinforcer, large-angle bending can be resisted, and excessive damage of the cable is avoided. The alloy lead layer can resist bending, and the embedded strip is embedded into the dense protective layer to ensure the combination of the alloy lead layer and the dense protective layer and prevent separation during bending. The components jointly resist large-angle bending and protect structures such as an insulating layer and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, in particular to a special cable and a film spraying method thereof. Background Art

[0002] Cables are wires used to transmit electrical energy, information, and convert electromagnetic energy. They consist of a conductor, insulation, shielding, and protective layers. The core component is the conductor, typically made of copper or aluminum, which offers excellent electrical conductivity and is used to conduct current. The insulation layer, wrapped around the conductor, prevents electrical leakage and ensures safety. The shielding layer reduces electromagnetic interference, while the protective layer provides protection against external physical damage and environmental corrosion. Cables are crucial in power systems, transmitting electricity and connecting power stations to substations, and substations to consumers, ensuring a stable power supply. Cables are also widely used in the communications sector, such as network cables, to transmit data signals and enable information transfer. With technological advancements, cable performance has been continuously optimized, including high-temperature resistance, corrosion resistance, and high flexibility, to adapt to diverse environments and needs. Their application scenarios now encompass a wide range of sectors, including industry, construction, and transportation, making them an indispensable infrastructure for the development of modern society.

[0003] However, the current cables mainly rely on the cooperation of conductors, insulation layers, shielding layers and protective layers to ensure their structural strength. Therefore, when the cable is bent at a large angle, the conductor may bend and deform excessively, causing damage to the outer insulation layer and shielding layer. It may even be damaged by friction with other conductors due to bending and deformation.

[0004] Therefore, a special cable and a film spraying method thereof are proposed to solve or alleviate the above problems. Summary of the Invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a special cable and a film spraying method thereof.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A special cable includes a main cable, several auxiliary cables parallel to the outer ring of the main cable, a filling film layer wrapping the main cable and the several auxiliary cables, a dense protective layer wrapped around the outer ring of the filling film layer, an alloy lead layer wrapped around the outer ring of the dense protective layer, and a polypropylene sheath layer wrapped around the outer ring of the alloy lead layer. The outer diameter of the main cable is larger than the outer diameter of the auxiliary cable, and the inner ring of the alloy lead layer is fixedly connected to several inner embedded strips embedded in the dense protective layer.

[0007] Preferably, the main cable includes a main insulation layer and several main conductors located in the main insulation layer. The outer circle of the main insulation layer is recessed inward to form several main pits, and the filling film layer is embedded in the main pits.

[0008] Preferably, the auxiliary cable includes an auxiliary insulation layer, several auxiliary conductors located in the auxiliary insulation layer, and an auxiliary composite coating filled in the auxiliary insulation layer and wrapping the several auxiliary conductors. The outer circle of the auxiliary insulation layer is recessed inward to form several auxiliary pits, and the filling film layer is embedded in the auxiliary pits.

[0009] Preferably, the main insulating layer and the auxiliary insulating layer are both made of XLPE material, the dense protective layer is a composite layer of polysiloxazane and silicon dioxide, and the auxiliary composite coating includes polyethylene material.

[0010] The present invention also provides a method for spraying a film layer of a special cable, which is used to spray a filling film layer in the special cable, comprising the following steps: Take a single main cable and multiple auxiliary cables and pull them into the cabling machine through a traction machine; The stranding cage in the cabling machine is stopped, and the single main cable and the multiple auxiliary cables are passed through the film spraying device before entering the cabling machine; A single main cable and multiple auxiliary cables are pulled, steered, and sprayed in a film spraying device to form a filling film layer; The outer sides of a single main cable and multiple auxiliary cables are sprayed with a filling film layer and then enter the cabling machine; In the cabling machine, a tape wrapping head wraps a tape-shaped polysiloxazane and silicon dioxide composite layer around the outside of the unsolidified filling film layer to form a dense protective layer. The take-up device in the cabling machine reels the cable wrapped with a dense protective layer.

[0011] Preferably, the film layer spraying device includes two side plates, a bottom plate fixedly connected between the side plates, a main cylinder and a three-way valve body installed through the bottom plate, a plurality of front guide wheels rotatably connected to one side plate, a plurality of rear guide wheels rotatably connected to the other side plate, a hinge block fixedly connected to the end faces of the two side plates and located between the front guide wheel and the rear guide wheel, and a front horizontal guide wheel and a rear horizontal guide wheel rotatably connected to the two hinge blocks respectively. The upper end of the main cylinder is connected to the front guide wheel and the front horizontal guide wheel, and the rear guide wheel and the rear horizontal guide wheel. The recovery cylinder between the two, the lower end of the main cylinder is connected with a negative pressure component, one end of the three-way valve body is connected with a pipe joint, and a one-way valve for closing its flow channel is fixedly connected to the pipe joint. The other end of the three-way valve body is connected with a transparent storage cylinder located above the bottom plate, and the last end of the three-way valve body is connected with a feeding pipeline, and the feeding pipeline is connected with a nozzle that passes through two side plates and is arranged opposite to the recovery cylinder. A passage is formed between the recovery cylinder and the nozzle for a single main cable and multiple auxiliary cables to pass through, and the injection cross-sectional area of ​​the nozzle is smaller than the cross-sectional area of ​​the recovery cylinder.

[0012] Preferably, the feeding pipeline includes a front material pipe connected to the three-way valve body and passing through the bottom plate, a pump body fixedly connected to the bottom plate and connected to the front material pipe, a rear material pipe connected to the pump body, and a main material pipe connected to the rear material pipe and passing through the two side plates. The two ends of the main material pipe are respectively connected to the nozzle, and the nozzle is connected to an atomizing nozzle.

[0013] Preferably, the upper end of the main cylinder is connected to an upper shrink cylinder, the diameter of the upper shrink cylinder is gradually reduced from bottom to top, and the upper shrink cylinder is connected to the recovery cylinder.

[0014] Preferably, the lower end of the main cylinder is connected to a lower shrinkage cylinder, the diameter of the lower shrinkage cylinder is gradually reduced from top to bottom, the negative pressure component is connected to the lower shrinkage cylinder and the discharge pipe, and the negative pressure component includes a suction pump.

[0015] Preferably, a bracket is further included, and the side panels are fixedly connected to the bracket.

[0016] The present invention has the following beneficial effects: This invention utilizes the main cable as a reinforcement, providing resistance to large bending angles and preventing excessive cable damage. The alloy lead layer provides resistance to bending, and its embedded strips are embedded in the dense protective layer, ensuring the two are bonded together to prevent separation during bending. Together, they provide resistance to large bending angles and protect the insulation layer and other structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a structural diagram of the special cable in the present invention; Figure 2 The structure of the film layer spraying device of the present invention is shown as follows Figure 1 ; Figure 3 The structure of the film layer spraying device of the present invention is shown as follows Figure 2 .

[0019] 1. Main conductor; 2. Main insulation layer; 3. Main recess; 4. Assistant conductor; 5. Auxiliary composite coating; 6. Auxiliary insulation layer; 7. Auxiliary recess; 8. Filling film layer; 9. Dense protective layer; 10. Alloy lead layer; 11. Inlaid strip; 12. Polypropylene sheath layer; 13. Bracket; 14. Side panel; 15. Bottom plate; 16. Front guide wheel; 17. Hinge block; 18. Front horizontal guide wheel; 19. Rear horizontal guide wheel; 20. Rear guide wheel; 21. Three-way valve body; 22. Transparent storage barrel; 23. Pipe joint; 24. Front material pipe; 25. Pump body; 26. Rear material pipe; 27. Main material pipe; 28. Nozzle; 29. ​​Main barrel; 30. Upper reduction barrel; 31. Upper vertical pipe; 32. Recovery barrel; 33. Lower reduction barrel; 34. Discharge pipe. DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0023] In the description of the present invention, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when in use, or are the orientation or position relationship commonly understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] Furthermore, the terms “first,” “second,” “third,” etc., are merely used for distinguishing descriptions and are not to be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0026] A special cable, such as Figure 1 As shown, it includes a main cable, several auxiliary cables parallel to the outer ring of the main cable, a filling film layer 8 wrapping the main cable and the several auxiliary cables, a dense protective layer 9 wrapped around the outer ring of the filling film layer 8, an alloy lead layer 10 wrapped around the outer ring of the dense protective layer 9, and a polypropylene sheath layer 12 wrapped around the outer ring of the alloy lead layer 10. The outer diameter of the main cable is larger than the outer diameter of the auxiliary cable, and the inner ring of the alloy lead layer 10 is fixedly connected with several inner embedded strips 11 embedded in the dense protective layer 9.

[0027] The main cable includes a main insulating layer 2 and several main conductors 1 located in the main insulating layer 2. The outer circle of the main insulating layer 2 is recessed inward to form several main pits 3, and the filling film layer 8 is embedded in the main pits 3. The auxiliary cable includes an auxiliary insulating layer 6, several guiding conductors 4 located in the auxiliary insulating layer 6, and an auxiliary composite coating 5 filled in the auxiliary insulating layer 6 and wrapping the several guiding conductors 4. The outer circle of the auxiliary insulating layer 6 is recessed inward to form several auxiliary pits 7, and the filling film layer 8 is embedded in the auxiliary pits 7. The main insulating layer 2 and the auxiliary insulating layer 6 are both made of XLPE material, the dense protective layer 9 is a composite layer of polysiloxane and silica, and the auxiliary composite coating 5 includes polyethylene material.

[0028] The present invention can play the role of a reinforcement member through the arrangement of the main cable line, and when the entire cable is bent at a large angle, the main cable line can play a resistance effect, so that the entire cable is not prone to excessive bending damage. In addition, the alloy lead layer 10 arrangement itself can play a role in resisting the bending of the cable to a large extent, and because the embedded strip 11 on the alloy lead layer 10 can be embedded in the dense protective layer 9, the alloy lead layer 10 can be combined with the dense protective layer 9 to avoid the alloy lead layer 10 and the dense protective layer 9 from separating during the bending process of the cable, so that the two can be combined to resist bending when the cable is bent at a large angle, thereby avoiding damage to its insulation layer and other structures.

[0029] The present invention also provides a method for spraying a film layer of a special cable, which is used to spray the filling film layer 8 in the special cable, comprising the following steps: Take a single main cable and multiple auxiliary cables and pull them into the cabling machine through a traction machine; The stranding cage in the cabling machine is stopped, and the single main cable and the multiple auxiliary cables are passed through the film spraying device before entering the cabling machine; A single main cable and multiple auxiliary cables are pulled, turned, and sprayed in a film spraying device to form a filling film layer 8; The outer sides of a single main cable and multiple auxiliary cables are sprayed with a filling film layer 8 and then enter the cabling machine; In the cabling machine, a tape wrapping head wraps a tape-shaped polysiloxazane and silicon dioxide composite layer around the outside of the unsolidified filling film layer 8 to form a dense protective layer 9; The take-up device in the cabling machine reels the cable wrapped with the dense protective layer 9.

[0030] like Figure 2 and Figure 3 As shown, the film spraying device includes a bracket 13, two side panels 14, a bottom panel 15 fixedly connected between the side panels 14, a main cylinder 29 installed on the bottom panel 15, and a three-way valve body 21, a plurality of front guide wheels 16 rotatably connected to one side panel 14, a plurality of rear guide wheels 20 rotatably connected to the other side panel 14, a hinge block 17 fixedly connected to the end surfaces of the two side panels 14 and located between the front guide wheel 16 and the rear guide wheel 20, and a front horizontal guide wheel 18 and a rear horizontal guide wheel 19 rotatably connected to the two hinge blocks 17. The upper end of the main cylinder 29 is connected to a hinge block 17 located between the front guide wheel 16 and the front horizontal guide wheel 18, and between the rear guide wheel 20 and the rear horizontal guide wheel 19. The recovery cylinder 32 between the flat guide wheels 19 and the side plate 14 are fixedly connected to the bracket 13. The lower end of the main cylinder 29 is connected to the negative pressure component. One end of the three-way valve body 21 is connected to the pipe joint 23. A one-way valve that closes its flow channel is fixedly connected to the pipe joint 23. The other end of the three-way valve body 21 is connected to a transparent storage cylinder 22 located above the bottom plate 15. The last end of the three-way valve body 21 is connected to a feeding pipeline. The feeding pipeline is connected to a nozzle 28 that passes through the two side plates 14 and is directly opposite the recovery cylinder 32. A passage is formed between the recovery cylinder 32 and the nozzle 28 for a single main cable and multiple auxiliary cables to pass through. The spraying cross-sectional area of ​​the nozzle 28 is smaller than the cross-sectional area of ​​the recovery cylinder 32.

[0031] The feeding pipeline includes a front material pipe 24 connected to the three-way valve body 21 and passing through the bottom plate 15, a pump body 25 fixedly connected to the bottom plate 15 and connected to the front material pipe 24, a rear material pipe 26 connected to the pump body 25, and a main material pipe 27 connected to the rear material pipe 26 and passing through the two side plates 14. The two ends of the main material pipe 27 are respectively connected to the nozzle 28, and the nozzle 28 is connected to the atomizing nozzle. The upper end of the main cylinder 29 is connected to the upper shrinkage cylinder 30, and the diameter of the upper shrinkage cylinder 30 is gradually reduced from bottom to top. The upper shrinkage cylinder 30 is connected to the recovery cylinder 32, and the lower end of the main cylinder 29 is connected to the lower shrinkage cylinder 33, and the diameter of the lower shrinkage cylinder 33 is gradually reduced from top to bottom. The negative pressure component is connected to the lower shrinkage cylinder 33 and the discharge pipe 34, and the negative pressure component includes a suction pump.

[0032] During the operation of the film spraying device, the single main cable and multiple auxiliary cables will pass through the front guide wheel 16, and then pass through the front horizontal guide wheel 18 and the rear horizontal guide wheel 19 to complete the turning of the single main cable and multiple auxiliary cables, and then the single main cable and multiple auxiliary cables can pass through the rear guide wheel 20 to leave the device.

[0033] When a single main cable and multiple auxiliary cables pass through the recovery cylinder 32 and the nozzle 28 to form a passage for the single main cable and multiple auxiliary cables to pass through, the negative pressure component can work, so that the recovery cylinder 32, the upper vertical pipe 31, the upper shrink cylinder 30, the main cylinder 29, the lower shrink cylinder 33, and the discharge pipe 34 generate negative pressure of the air in sequence, and then the recovery cylinder 32 can suck the air, and the pump body 25 can suck the raw materials in the transparent storage cylinder 22. The setting of the transparent storage cylinder 22 can judge the amount of raw materials stored therein. If the raw materials are insufficient, the operator can connect the external raw material pipeline through the pipe joint 23, and then Then start the pump body 25 and increase the power of the pump body 25 so that the raw materials can enter the three-way valve body 21. The excess raw materials will enter the transparent storage barrel 22 for storage under the guidance of the one-way valve. Under normal circumstances, when the pump body 25 is working, it will pass through the front material pipe 24, the rear material pipe 26, the main material pipe 27, and the nozzle 28 in this order, so that the atomizing nozzle sprays the raw materials onto a single main cable and multiple auxiliary cables, thereby forming a filling film layer 8. Moreover, since the spraying cross-sectional area of ​​the nozzle 28 is smaller than the cross-sectional area of ​​the recovery barrel 32, the recovery barrel 32 can absorb the excess sprayed raw materials to avoid the raw materials being sprayed into the environment and causing pollution.

[0034] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A special cable, characterized in that: The invention comprises a main cable, a plurality of auxiliary cables arranged in parallel on the outer ring of the main cable, a filling film layer (8) wrapping the main cable and the plurality of auxiliary cables, a dense protective layer (9) wrapped on the outer ring of the filling film layer (8), an alloy lead layer (10) wrapped on the outer ring of the dense protective layer (9), and a polypropylene sheath layer (12) wrapped on the outer ring of the alloy lead layer (10), wherein the outer diameter of the main cable is greater than the outer diameter of the auxiliary cables, and the inner ring of the alloy lead layer (10) is fixedly connected with a plurality of inner embedded strips (11) embedded in the dense protective layer (9).

2. A special cable according to claim 1, characterized in that: The main cable comprises a main insulating layer (2) and a plurality of main conductors (1) located within the main insulating layer (2); the outer ring of the main insulating layer (2) is recessed inward to form a plurality of main pits (3); and the filling film layer (8) is embedded in the main pits (3).

3. A special cable according to claim 2, characterized in that: The auxiliary cable comprises an auxiliary insulating layer (6), a plurality of auxiliary guiding bodies (4) located in the auxiliary insulating layer (6), and an auxiliary composite coating (5) filled in the auxiliary insulating layer (6) and wrapping the plurality of auxiliary guiding bodies (4); the outer ring of the auxiliary insulating layer (6) is recessed inward to form a plurality of auxiliary pits (7), and the filling film layer (8) is embedded in the auxiliary pits (7).

4. A special cable according to claim 3, characterized in that: The main insulating layer (2) and the auxiliary insulating layer (6) are both made of XLPE material, the dense protective layer (9) is a composite layer of polysiloxane and silicon dioxide, and the auxiliary composite coating (5) includes polyethylene material.

5. A method for spraying a film layer of a special cable, for spraying a filling film layer in a special cable according to any one of claims 1 to 4, characterized in that: The steps include: Take a single main cable and multiple auxiliary cables and pull them into the cabling machine through a traction machine; The stranding cage in the cabling machine is stopped, and the single main cable and the multiple auxiliary cables are passed through the film spraying device before entering the cabling machine; A single main cable and a plurality of auxiliary cables are pulled, turned, and sprayed in a film spraying device to form a filling film layer (8); A single main cable and multiple auxiliary cables are sprayed with a filling film layer (8) on their outer sides and then enter a cabling machine; In the cabling machine, a tape wrapping head wraps a tape-shaped polysiloxane and silicon dioxide composite layer around the outside of the unsolidified filling film layer (8) to form a dense protective layer (9); The cable reeling device in the cabling machine reels the cable wrapped with the dense protective layer (9).

6. The film spraying method for a special cable according to claim 5, characterized in that: The film layer spraying device comprises two side plates (14), a bottom plate (15) fixedly connected between the side plates (14), a main cylinder (29) and a three-way valve body (21) installed on the bottom plate (15), a plurality of front guide wheels (16) rotatably connected to one side plate (14), a plurality of rear guide wheels (20) rotatably connected to the other side plate (14), a hinge block (17) fixedly connected to the end faces of the two side plates (14) and located between the front guide wheel (16) and the rear guide wheel (20), and a front horizontal guide wheel (18) and a rear horizontal guide wheel (19) rotatably connected to the two hinge blocks (17). The upper end of the main cylinder (29) is connected to a hinge block located between the front guide wheel (16) and the front horizontal guide wheel (18), and between the rear guide wheel (20) and the front horizontal guide wheel (19). A recovery cylinder (32) is provided between the rear horizontal guide wheels (19), the lower end of the main cylinder (29) is connected to a negative pressure assembly, one end of the three-way valve body (21) is connected to a pipe joint (23), a one-way valve for closing its flow channel is fixedly connected to the pipe joint (23), the other end of the three-way valve body (21) is connected to a transparent storage cylinder (22) located above the bottom plate (15), the last end of the three-way valve body (21) is connected to a feeding pipeline, the feeding pipeline is connected to a nozzle (28) that passes through the two side plates (14) and is arranged opposite to the recovery cylinder (32), a groove is formed between the recovery cylinder (32) and the nozzle (28) for a single main cable and multiple auxiliary cables to pass through, and the spraying cross-sectional area of ​​the nozzle (28) is smaller than the cross-sectional area of ​​the recovery cylinder (32).

7. The film spraying method for a special cable according to claim 6, characterized in that: The feeding pipeline includes a front material pipe (24) connected to the three-way valve body (21) and penetrating the bottom plate (15), a pump body (25) fixedly connected to the bottom plate (15) and connected to the front material pipe (24), a rear material pipe (26) connected to the pump body (25), and a main material pipe (27) connected to the rear material pipe (26) and penetrating the two side plates (14), wherein both ends of the main material pipe (27) are respectively connected to the nozzle (28), and the nozzle (28) is connected to an atomizing nozzle.

8. The film spraying method for a special cable according to claim 6, characterized in that: The upper end of the main cylinder (29) is connected to an upper shrink cylinder (30), the diameter of the upper shrink cylinder (30) is gradually reduced from bottom to top, and the upper shrink cylinder (30) is connected to the recovery cylinder (32).

9. The film spraying method for a special cable according to claim 6, characterized in that: The lower end of the main cylinder (29) is connected to a lower shrink cylinder (33), the diameter of which is gradually reduced from top to bottom. The negative pressure component is connected to the lower shrink cylinder (33) and a discharge pipe (34), and the negative pressure component includes a suction pump.

10. The film spraying method for a special cable according to claim 6, characterized in that: It also includes a bracket (13), and the side plate (14) is fixedly connected to the bracket (13).

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