Multi-core composite structure thermoplastic polyurethane insulated control cable

Abstract

This invention relates to the field of control cable technology, specifically to a multi-core composite thermoplastic polyurethane insulated control cable. It solves the problems often encountered in multi-core control cables during use, such as core displacement, off-center cores, or entanglement due to the lack of independent and stable isolation structures between the multiple cores. Furthermore, it addresses the difficulty in quickly extinguishing fires and protecting the internal cores during fires, as well as the challenge of reinforcing the cores. The invention includes an outer sheath, inside which, from the outside in, are an inner sheath, a flame-retardant layer, a composite skeleton, and an expansion and deformation layer. The invention utilizes a combination of connecting plates and mounting grooves, where the connecting pipe and connecting plate are arranged inside the inner sheath in a shape of ten regular pentagons enclosing a regular decagon. This allows for the separate installation of multiple core structures, preventing entanglement and friction between them, thus ensuring the service life of the multi-core composite cable and eliminating its inherent dangers.

Description

Technical Field

[0001] This invention relates to the field of control cable technology, specifically to a multi-core composite thermoplastic polyurethane insulated control cable. Background Technology

[0002] Control cables are core signal transmission components used in fields such as industrial automation, rail transportation, intelligent equipment, and new energy equipment. They mainly undertake the transmission of control signals and monitoring signals, and multi-core structure is the mainstream design form of control cables.

[0003] Existing multi-core control cables often suffer from core displacement, misalignment, or entanglement due to the lack of independent and stable isolation structures between the multiple cores. Furthermore, in the event of a fire, it is difficult to quickly extinguish the fire and protect the internal cores, and it is also difficult to reinforce the cores. Therefore, they do not meet the current requirements. To address this, we propose a multi-core composite structure thermoplastic polyurethane insulated control cable. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-core composite thermoplastic polyurethane insulated control cable to solve the problems mentioned in the background art, such as the lack of independent and stable barrier structures between the multiple core wires, which often leads to core wire displacement, off-center cores, or mutual entanglement after long-term use. In addition, it is difficult to quickly extinguish the fire and protect the internal core wires in the event of a fire, and it is also difficult to reinforce the core wires.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a multi-core composite structure thermoplastic polyurethane insulated control cable, comprising an outer sheath, an inner sheath, a flame-retardant layer, a composite skeleton, and an expansion deformation layer arranged sequentially from the outside to the inside of the outer sheath, an inner sheath being provided on the inner surface of the outer sheath, and multiple composite skeletons being movably clamped inside the inner side of the inner sheath, with an expansion deformation layer provided inside the innermost composite skeleton;

[0006] The composite skeleton includes connecting pipes, filling pipes, and connecting plates. The inner protective layer and the expansion deformation layer are provided with three layers of skeleton structure from the outside to the inside. Each layer of skeleton structure has ten connecting pipes. Three connecting plates are fixedly installed on the outer surface of each connecting pipe. Each connecting pipe is filled with filling pipe. Every two adjacent connecting pipes are connected to each other by connecting plates. The ten connecting pipes in the innermost layer are combined into a regular decagon by connecting plates. The twenty connecting pipes in the other two layers are combined outward with each outer side of the regular decagon formed by the connecting pipes in the inner layer as the base, and are combined into ten regular pentagons around the perimeter of the regular decagon by connecting plates.

[0007] Preferably, the composite skeleton further includes connecting buckles and connecting grooves. Connecting buckles are fixedly installed at the outer ends of the same-direction sides of the three connecting plates located on the same connecting pipe surface, and connecting grooves are provided on the surface of the connecting plates near the connecting pipe. The connecting buckles are all slidably inserted into the interior of the connecting grooves.

[0008] Preferably, the inner protective layer includes an inner sleeve, mounting plates, mounting grooves, limiting grooves, and limiting buckles. The inner sleeve is movably installed inside the outer protective layer. Ten mounting plates are fixedly installed on the inner wall surface of the inner sleeve. Each mounting plate has a mounting groove on its surface. Each mounting groove has a limiting groove at its innermost position. Each mounting groove has a limiting buckle fixedly installed at its outermost position.

[0009] Preferably, the outer protective layer includes an outer sheath and an armor layer. The armor layer is provided on the inner side of the outer sheath. The outer sheath is made of thermoplastic polyurethane, and the armor layer is made of galvanized steel strip. The armor layer is installed on the inner side of the outer sheath in a mesh structure.

[0010] Preferably, a set of flame-retardant layers is provided between every two mounting plates. Each set of flame-retardant layers includes multiple flame-retardant bladders and inert gas. Each flame-retardant bladder has a flame-retardant cavity inside, and the flame-retardant cavity is filled with inert gas. A connecting pipe is provided between each set of flame-retardant layers, and the interiors of every two adjacent flame-retardant bladders are connected by the connecting pipe.

[0011] Preferably, the innermost decagonal, composed of a connecting pipe and a connecting plate, has an expansion deformation layer. The expansion deformation layer includes multiple I-shaped extrusions and expansion deformation sleeves. One side surface of each I-shaped extrusion is elastically fitted to the outer surface contour of the connecting pipe, and the other side surface of each I-shaped extrusion is elastically fitted to the expansion deformation sleeve. The expansion deformation sleeve is made of thermoplastic elastomer (TPE).

[0012] Preferably, both the interior of the expansion deformation sleeve and the interior of the regular pentagon formed by the connecting tube and the connecting plate are provided with a wire core structure. The wire core structure includes a central reinforcing core, a conductor, and a shielding layer. Multiple conductors are wound around the outer surface of the central reinforcing core, and a shielding layer is provided on the outer side of the conductor.

[0013] Preferably, an isolation layer is provided between the armor layer and the inner sheath, and the isolation layer is made of polyvinyl chloride (PVC).

[0014] Preferably, the gaps between the inner sheath and the flame-retardant layer, composite skeleton, expansion deformation layer and wire core structure are filled with filler.

[0015] Preferably, the connecting plates on the outermost connecting pipe surface are all movably engaged into the mounting groove, the connecting buckles on the outermost connecting pipe surface are all movably engaged into the limiting groove, and the limiting buckles are all movably engaged into the connecting groove on the outermost connecting pipe surface.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. This invention, through the cooperation of the inner sheath and the composite skeleton, allows the device to be used by combining the connecting plate and the mounting groove. The connecting pipe and the connecting plate are combined inside the inner sheath to form a shape of ten regular pentagons wrapping a regular decagon. This allows the device to install multiple core structures separately, avoiding entanglement and friction between multiple core structures, ensuring the service life of the multi-core composite cable, and eliminating the dangers of multi-core composite cables. At the same time, the cooperation between the connecting buckle, the connecting groove, the limiting groove, and the limiting buckle reinforces the composite skeleton, thereby reinforcing the core structure and preventing the core structure from shifting or becoming eccentric due to the separation of the composite skeleton during use.

[0018] 2. This invention, through the combination of a flame-retardant layer and an expansion deformation layer, allows the device to fill multiple flame-retardant bladders between every two mounting plates during use. These bladders are filled with inert gas. In the event of a fire, the high temperature rapidly burns through the outermost flame-retardant bladder, releasing the inert gas and thus extinguishing the fire. Simultaneously, when no fire occurs, the inert gas expands the flame-retardant bladders, tightly adhering them to the surface of the outermost connecting pipe, thus compressing the pipe and preventing it from loosening. Furthermore, by filling the expansion deformation sleeve with filler, it expands and deforms outward, further compressing the innermost connecting pipe and preventing it from loosening, thereby stabilizing the composite frame. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the armor layer structure of the present invention;

[0021] Figure 3 This is an exploded structural diagram of the composite skeleton of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of the inner protective layer of the present invention;

[0023] Figure 5 This is a cross-sectional front view of the entire invention;

[0024] Figure 6This is a cross-sectional side view of the entire invention;

[0025] Figure 7 For the present invention Figure 5 A partial structural diagram of part A in the middle.

[0026] In the diagram: 1. Outer sheath; 101. Outer sleeve; 102. Armor layer; 2. Inner sheath; 201. Inner sleeve; 202. Mounting plate; 203. Mounting groove; 204. Limiting groove; 205. Limiting buckle; 3. Flame retardant layer; 301. Flame retardant bladder; 302. Inert gas; 4. Composite skeleton; 401. Connecting pipe; 402. Filling pipe; 403. Connecting plate; 404. Connecting buckle; 405. Connecting groove; 5. Expansion deformation layer; 501. I-shaped extruded part; 502. Expansion deformation sleeve; 6. Core structure; 601. Central reinforcing core, conductor; 603. Shielding layer; 7. Isolation layer; 8. Filler. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0028] Please see Figures 1 to 7 An embodiment of the present invention provides a multi-core composite structure thermoplastic polyurethane insulated control cable, including an outer sheath 1, an inner sheath 2, a flame-retardant layer 3, a composite skeleton 4 and an expansion deformation layer 5 arranged sequentially from the outside to the inside of the outer sheath 1, an inner sheath 2 arranged on the inner surface of the outer sheath 1, a plurality of composite skeletons 4 movably clamped inside the inner sheath 2, and an expansion deformation layer 5 arranged inside the innermost composite skeleton 4.

[0029] The composite skeleton 4 includes connecting pipes 401, filling pipes 402, and connecting plates 403. Between the inner protective layer 2 and the expansion and deformation layer 5, there are three layers of skeleton structure arranged from the outside to the inside. Each layer of skeleton structure has ten connecting pipes 401. Three connecting plates 403 are fixedly installed on the outer surface of each connecting pipe 401. Each connecting pipe 401 is filled with filling pipes 402. Every two adjacent connecting pipes 401 are connected to each other through connecting plates 403. The ten connecting pipes 401 in the innermost layer are combined into a regular decagon through connecting plates 403. The twenty connecting pipes 401 in the other two layers are combined outward with each outer side of the regular decagon formed by the connecting pipes 401 in the inner layer as the base side, and are combined into ten regular pentagons around the perimeter of the regular decagon through connecting plates 403.

[0030] The composite frame 4 also includes a connecting buckle 404 and a connecting groove 405. The connecting buckle 404 is fixedly installed at the outer end of the same side of the three connecting plates 403 located on the same surface of the connecting pipe 401, and the connecting plate 403 is provided with a connecting groove 405 near the connecting pipe 401. The connecting buckle 404 slides into the interior of the connecting groove 405.

[0031] By combining the inner sheath 2 and the composite skeleton 4, the device can be used by combining the connecting plate 403 and the mounting groove 203. This allows the connecting pipe 401 and the connecting plate 403 to form a shape of ten regular pentagons enclosing a regular decagon inside the inner sheath 201. This allows the device to install multiple core structures 6 separately, preventing them from tangling and causing friction, thus ensuring the service life of the multi-core composite cable and eliminating the dangers associated with multi-core composite cables. At the same time, the combination of the connecting buckle 404, the connecting groove 405, the limiting groove 204, and the limiting buckle 205 reinforces the composite skeleton 4, thereby reinforcing the core structure 6 and preventing the core structure 6 from shifting or becoming misaligned due to the separation of the composite skeleton 4 during use.

[0032] The inner protective layer 2 includes an inner sheath 201, a mounting plate 202, a mounting groove 203, a limiting groove 204, and a limiting buckle 205. The inner sheath 201 is movably installed inside the outer protective layer 1. Ten mounting plates 202 are fixedly installed on the inner wall surface of the inner sheath 201. The surface of each mounting plate 202 is provided with a mounting groove 203. The innermost position of each mounting groove 203 is provided with a limiting groove 204. The outermost position of each mounting groove 203 is fixedly installed with a limiting buckle 205.

[0033] The outer sheath 1 includes an outer sheath 101 and an armor layer 102. The armor layer 102 is provided on the inner side of the outer sheath 101. The outer sheath 101 is made of thermoplastic polyurethane, and the armor layer 102 is made of galvanized steel strip. The armor layer 102 is installed on the inner side of the outer sheath 101 in a mesh structure.

[0034] A set of flame-retardant layers 3 is provided between every two mounting plates 202. Each set of flame-retardant layers 3 includes multiple flame-retardant bladders 301 and inert gas 302. Each flame-retardant bladder 301 has a flame-retardant cavity inside, and the flame-retardant cavity is filled with inert gas 302. A connecting pipe is provided between each set of flame-retardant layers 3, and the interiors of every two adjacent flame-retardant bladders 301 are connected by the connecting pipe.

[0035] An expansion deformation layer 5 is provided inside the innermost decagon composed of connecting pipe 401 and connecting plate 403. The expansion deformation layer 5 includes multiple I-shaped extrusion parts 501 and expansion deformation sleeves 502. One side surface of each I-shaped extrusion part 501 is elastically fitted to the outer surface contour of the connecting pipe 401, and the other side surface of each I-shaped extrusion part 501 is elastically fitted to the expansion deformation sleeve 502. The expansion deformation sleeve 502 is made of thermoplastic elastomer TPE.

[0036] The interior of the expansion deformation sleeve 502 and the interior of the regular pentagon formed by the connecting pipe 401 and the connecting plate 403 are both provided with a wire core structure 6. The wire core structure 6 includes a central reinforcing core 601, a conductor 602 and a shielding layer 603. Multiple conductors 602 are wound around the outer surface of the central reinforcing core 601, and a shielding layer 603 is provided on the outer side of the conductors 602.

[0037] By combining the flame-retardant layer 3 and the expansion deformation layer 5, the device can fill multiple flame-retardant bladders 301 between every two mounting plates 202 during use, and fill the flame-retardant bladders 301 with inert gas 302. In the event of a fire, the high temperature will quickly burn through the outermost flame-retardant bladder 301, causing the inert gas 302 to be released, thus achieving the fire extinguishing function. At the same time, when no fire occurs, the inert gas 302 will expand the flame-retardant bladder 301 and make it tightly fit the surface of the outermost connecting pipe 401, thereby compressing the outermost connecting pipe 401 and preventing it from loosening. Simultaneously, by filling the expansion deformation sleeve 502 with filler 8, the expansion deformation sleeve 502 expands and deforms outward, thereby compressing the I-shaped extrusion piece 501 to squeeze the innermost connecting pipe 401 outward, thus compressing the innermost connecting pipe 401 and preventing it from loosening, thereby achieving the stability of the composite frame 4.

[0038] An isolation layer 7 is provided between the armor layer 102 and the inner sheath 201. The isolation layer 7 is made of polyvinyl chloride (PVC).

[0039] The gaps between the inner sheath 2 and the flame retardant layer 3, composite skeleton 4, expansion and deformation layer 5 and core structure 6 are all filled with filler material 8.

[0040] The connecting plates 403 on the surface of the outermost connecting pipe 401 are all movably inserted into the interior of the mounting groove 203, the connecting buckles 404 on the surface of the outermost connecting pipe 401 are all movably inserted into the interior of the limiting groove 204, and the limiting buckles 205 are all movably inserted into the interior of the connecting groove 405 on the surface of the outermost connecting pipe 401.

[0041] In use, this multi-core composite thermoplastic polyurethane insulated control cable can be assembled by connecting plate 403 and mounting groove 203, so that connecting pipe 401 and connecting plate 403 are combined inside inner sheath 201 to form a shape of ten regular pentagons wrapping one regular decagon. This allows the device to install multiple core structures 6 separately, avoiding entanglement and friction between multiple core structures 6, ensuring the service life of the multi-core composite cable, and eliminating the dangers of multi-core composite cables.

[0042] Meanwhile, the composite skeleton 4 is reinforced by the cooperation between the connecting buckle 404, the connecting groove 405, the limiting groove 204 and the limiting buckle 205, thereby reinforcing the core structure 6 and preventing the core structure 6 from shifting or becoming eccentric due to the separation of the composite skeletons 4 during use.

[0043] By filling multiple flame-retardant bladders 301 between every two mounting plates 202 and filling the flame-retardant bladders 301 with inert gas 302, when a fire occurs in the cable, the high temperature will quickly burn through the outermost flame-retardant bladder 301, and then the inert gas 302 will be ejected, thereby achieving the function of extinguishing the fire.

[0044] Meanwhile, when no fire occurs, the inert gas 302 will expand the flame-retardant sleeve 301 and make it fit tightly against the surface of the outermost connecting pipe 401, thereby compressing the outermost connecting pipe 401 and preventing it from loosening. At the same time, by filling the expansion deformation sleeve 502 with filler 8, the expansion deformation sleeve 502 will expand and deform outward, thereby compressing the I-shaped extrusion piece 501 to squeeze the innermost connecting pipe 401 outward, thereby compressing the innermost connecting pipe 401 and preventing it from loosening, thus achieving the stability of the composite skeleton 4.

[0045] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A multi-core composite thermoplastic polyurethane insulated control cable, comprising an outer sheath (1), characterized in that: The outer protective layer (1) is provided with an inner protective layer (2), a flame retardant layer (3), a composite skeleton (4) and an expansion deformation layer (5) in sequence from the outside to the inside. The inner surface of the outer protective layer (1) is provided with an inner protective layer (2). Multiple composite skeletons (4) are movably clamped inside the inner protective layer (2). An expansion deformation layer (5) is provided inside the innermost composite skeleton (4). The composite skeleton (4) includes connecting pipes (401), filling pipes (402) and connecting plates (403). The inner protective layer (2) and the expansion deformation layer (5) are provided with three layers of skeleton structure from the outside to the inside. Each layer of skeleton structure is provided with ten connecting pipes (401). Three connecting plates (403) are fixedly installed on the outer surface of each connecting pipe (401). The interior of each connecting pipe (401) is filled with filling pipes (402). Each pair of adjacent connecting pipes (401) are connected to each other through connecting plates (403). The ten connecting pipes (401) in the innermost layer are combined into a regular decagon through connecting plates (403). The twenty connecting pipes (401) in the other two layers are combined into ten regular pentagons around the outer perimeter of the regular decagon formed by the connecting pipes (401) in the inner layer, with each outer side of the regular decagon formed by the connecting pipes (401) in the inner layer as the base.

2. The multi-core composite thermoplastic polyurethane insulated control cable according to claim 1, characterized in that: The composite frame (4) also includes a connecting buckle (404) and a connecting groove (405). The connecting buckles (404) are fixedly installed at the outer ends of the same side of the three connecting plates (403) located on the same connecting pipe (401). The connecting plates (403) are provided with connecting grooves (405) near the connecting pipe (401). The connecting buckles (404) are all slidably inserted into the interior of the connecting grooves (405).

3. The multi-core composite thermoplastic polyurethane insulated control cable according to claim 2, characterized in that: The inner protective layer (2) includes an inner sleeve (201), a mounting plate (202), a mounting groove (203), a limiting groove (204), and a limiting buckle (205). The inner sleeve (201) is movably installed inside the outer protective layer (1). Ten mounting plates (202) are fixedly installed on the inner wall surface of the inner sleeve (201). The surface of each mounting plate (202) is provided with a mounting groove (203). The innermost position of each mounting groove (203) is provided with a limiting groove (204). The outermost position of each mounting groove (203) is fixedly installed with a limiting buckle (205).

4. The multi-core composite thermoplastic polyurethane insulated control cable according to claim 1, characterized in that: The outer protective layer (1) includes an outer sheath (101) and an armor layer (102). The armor layer (102) is provided on the inner side of the outer sheath (101). The outer sheath (101) is made of thermoplastic polyurethane, and the armor layer (102) is made of galvanized steel strip. The armor layer (102) is installed on the inner side of the outer sheath (101) in a mesh structure.

5. A multi-core composite thermoplastic polyurethane insulated control cable according to claim 3, characterized in that: A set of flame-retardant layers (3) is provided between each pair of mounting plates (202). Each set of flame-retardant layers (3) includes multiple flame-retardant bladders (301) and inert gas (302). Each flame-retardant bladder (301) has a flame-retardant cavity inside, and the flame-retardant cavity is filled with inert gas (302). A connecting pipe is provided between each set of flame-retardant layers (3), and the interiors of each pair of adjacent flame-retardant bladders (301) are connected by the connecting pipe.

6. A multi-core composite thermoplastic polyurethane insulated control cable according to claim 2, characterized in that: An expansion deformation layer (5) is provided inside the innermost decagon composed of a connecting pipe (401) and a connecting plate (403). The expansion deformation layer (5) includes multiple I-shaped extrusions (501) and expansion deformation sleeves (502). One side surface of each I-shaped extrusion (501) is elastically fitted to the outer surface contour of the connecting pipe (401), and the other side surface of each I-shaped extrusion (501) is elastically fitted to the expansion deformation sleeve (502). The expansion deformation sleeve (502) is made of thermoplastic elastomer TPE.

7. A multi-core composite thermoplastic polyurethane insulated control cable according to claim 6, characterized in that: The interior of the expansion deformation sleeve (502) and the interior of the regular pentagon formed by the connecting tube (401) and the connecting plate (403) are provided with a wire core structure (6). The wire core structure (6) includes a central reinforcing core (601), a conductor (602) and a shielding layer (603). Multiple conductors (602) are wound around the outer surface of the central reinforcing core (601), and a shielding layer (603) is provided on the outer side of the conductor (602).

8. A multi-core composite thermoplastic polyurethane insulated control cable according to claim 4, characterized in that: An isolation layer (7) is provided between the armor layer (102) and the inner sheath (201), and the isolation layer (7) is made of polyvinyl chloride (PVC).

9. A multi-core composite thermoplastic polyurethane insulated control cable according to claim 1, characterized in that: The gaps between the inner protective layer (2) and the flame-retardant layer (3), composite skeleton (4), expansion deformation layer (5) and core structure (6) are filled with filler (8).

10. A multi-core composite thermoplastic polyurethane insulated control cable according to claim 3, characterized in that: The connecting plates (403) on the outermost connecting pipe (401) are all movably inserted into the mounting groove (203), the connecting buckles (404) on the outermost connecting pipe (401) are all movably inserted into the limiting groove (204), and the limiting buckles (205) are all movably inserted into the connecting groove (405) on the outermost connecting pipe (401).

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