Power cable conduit with skeleton structure

Abstract

The utility model relates to the technical field of power cable conduits, in particular to a power cable conduit with a skeleton structure, which comprises a cable conduit main body, a cable is sleeved on the inner wall of the cable conduit main body, a protection assembly is chemically bonded on the inner wall of the cable conduit main body, and two ends of the outer wall of the cable conduit main body are mechanically connected with supporting mechanisms. And the cable tube penetrates through the cable tube main body to the inner wall of the protection assembly. Through mutual cooperation of internal parts of the protection assembly, the fireproof performance and the sealing performance of the cable tube main body are conveniently improved, the cable on the inner wall of the cable tube main body is protected, the cable can be normally used, the waterproof performance of the cable tube main body and the cable can be improved, and the service life of the cable tube is prolonged. Through mutual cooperation of internal parts of the supporting mechanism, the supporting performance of the cable tube main body is improved, the cable tube main body is not deformed under long-term extrusion, and mutual butt joint connection of multiple cable tube main bodies is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of power cable conduit technology, and specifically to a power cable conduit with a skeleton structure. Background Technology

[0002] Power cables are cables used for transmitting and distributing electrical energy. They are commonly used in urban underground power grids, power plant lead-out lines, internal power supply in industrial and mining enterprises, and underwater transmission lines across rivers and seas. The proportion of cables in power lines is gradually increasing. Power cables are cable products used in the main lines of power systems to transmit and distribute high-power electrical energy, including power cables of various voltage levels from 1-500KV and above, and various types of insulation.

[0003] A search revealed a utility model patent with publication number CN221378998U, which discloses a power cable with a protective structure. The cable includes a sheath layer coated with an acrylic ester layer. A reinforcing layer is fixedly connected inside the sheath layer. A tensile-resistant corrugated sleeve is located in the middle of the sheath layer. A pressure-resistant assembly is fixedly connected to the inner wall of the sheath layer. Three sets of steel strip assemblies are arranged in a circular array inside the pressure-resistant assembly. A PP strip layer is located inside the steel strip assembly. An insulation layer is connected inside the PP strip layer, and a cable core is sleeved inside the insulation layer. This power cable with a protective structure, through the reinforcement layer and corrugated sleeve, enhances the strength of the sheath layer with reinforcing rings and ribs, and improves the tensile strength of the sheath layer with the corrugated sleeve, thereby increasing the strength of the power cable and preventing breakage due to external pulling, thus protecting the power cable.

[0004] Although the aforementioned patent improves the strength of the sheath layer by adding a reinforcing layer and a corrugated sleeve, and enhances the tensile strength of the sheath layer by adding reinforcing rings and reinforcing ribs, thereby improving the tensile strength of the sheath layer and preventing the power cable from breaking due to external pulling, thus protecting the power cable, the cable conduit is generally buried outdoors or under roads. Buried underground, it is subject to compression and vibration. Long-term compression and vibration can cause deformation of the outer wall of the power cable conduit, resulting in the cable inside the power cable conduit being compressed and affecting its normal use. Furthermore, the deformed outer wall of the power cable conduit makes it difficult for workers to pull the cable out of the power cable conduit for maintenance and replacement.

[0005] Therefore, it is necessary to propose a power cable conduit with a skeleton structure to solve the above problems. Utility Model Content

[0006] The purpose of this utility model is to provide a power cable conduit with a skeleton structure. Through the mutual cooperation between the internal parts of the support mechanism, the support performance of the cable conduit body is improved, so that the cable conduit body does not deform under long-term compression, and it is easy to connect and connect multiple cable conduit bodies. This solves the problem in the prior art that cable conduits buried underground are subject to compression and vibration. Long-term compression and vibration will cause deformation of the outer wall of the power cable conduit, resulting in the cable inside the power cable conduit being compressed and affecting normal use. Furthermore, the deformed outer wall of the power cable conduit makes it difficult for workers to pull the cable out of the power cable conduit for maintenance and replacement.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a power cable conduit with a skeleton structure, including a cable conduit body, a cable wire sleeved on the inner wall of the cable conduit body, a protective component chemically bonded to the inner wall of the cable conduit body, and a support mechanism mechanically connected to both ends of the outer wall of the cable conduit body, which penetrates the cable conduit body to the inner wall of the protective component;

[0008] The protective component includes a flame-retardant layer located on the inner wall of the cable conduit body and sleeved and fitted to the outer wall of the cable. A heat insulation layer is chemically bonded to the outer wall of the flame-retardant layer. An inner rubber layer is chemically bonded to the outer wall of the heat insulation layer. An outer rubber layer is chemically bonded to the outer wall of the inner rubber layer. A PVC plastic layer is chemically bonded to the outer wall of the outer rubber layer.

[0009] The support mechanism includes multiple docking blocks, which are mechanically connected to both sides of the outer wall of the cable pipe body. The outer wall of the docking block is machined with an arc-shaped limiting plate that extends into the interior of the cable pipe body. The inner wall of the flame-retardant layer is chemically bonded with a second support frame, which is sleeved and fitted to the outer wall of the cable. The inner rubber layer and the outer rubber layer are chemically bonded with a first support frame.

[0010] Preferably, the outer walls of the cable conduit body are fixed with connecting flanges on both sides, and the inner wall of the cable conduit body has a sealing ring for connection with the cable.

[0011] Preferably, the second support frame and the first support frame are distributed in a hollow mesh pattern on the inner wall of the flame retardant layer and the outer wall of the inner rubber layer, respectively. The first support frame and the second support frame are mainly made of metal steel wire, and the surface of the second support frame is chemically bonded with a rubber layer.

[0012] Preferably, both the inner and outer rubber layers are made of vinylon fiber, and a support groove matching the first support frame is left between the inner and outer rubber layers.

[0013] Preferably, the flame retardant layer is mainly made of polyvinyl chloride, and the heat insulation layer is mainly made of phenolic resin.

[0014] Preferably, the two ends of the cable pipe body are respectively provided with docking grooves that match the docking block and the arc-shaped limiting plate, and the docking grooves are provided with limiting grooves that match the arc-shaped limiting plate.

[0015] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0016] 1. The flame-retardant layer is mainly made of polyvinyl chloride, and the heat insulation layer is mainly made of phenolic resin. This allows the high temperature generated inside the cable after long-term use to be isolated by the heat insulation layer, keeping the outer wall of the cable conduit at a suitable temperature. This prevents workers from being burned by the outer wall of the cable conduit when they are inspecting and maintaining the cable conduit. Both the inner and outer rubber layers are made of vinylon fiber, and there are support grooves between the inner walls of the inner and outer rubber layers that match the No. 1 support frame. This allows the No. 1 support frame to be placed between the inner and outer rubber layers, and also gives the inner and outer rubber layers a certain degree of support strength. Through the inner and outer rubber layers and the PVC plastic layer, the sealing and waterproof performance of the outer wall of the cable conduit is improved.

[0017] 2. By connecting two cable conduit bodies together, the connecting blocks on the outer walls of the cable conduit bodies, each carrying an arc-shaped limiting plate, penetrate into the interior of the cable conduit body. Simultaneously, the bolt holes on the connecting flanges on the outer walls of the cable conduit bodies are staggered. Rotating the cable conduit body causes the connecting groove to rotate, moving the arc-shaped limiting plates penetrating the interior of the cable conduit body into the limiting groove, thus completing the connection and fixing between the two cable conduit bodies. This also aligns the bolt holes on the connecting flanges on the outer walls of the cable conduit bodies, facilitating the connection and fixing of the two cable conduit bodies. The No. 2 and No. 1 support frames, arranged in a perforated mesh pattern on the inner wall of the flame-retardant layer and the outer wall of the inner rubber layer respectively, enhance the compression resistance of the cable conduit body. Furthermore, the No. 2 support frame contacts the outer wall of the cable, facilitating a tight seal between the cable and the cable conduit body, thereby improving the support performance of the cable conduit body and preventing deformation under long-term compression, thus improving its overall performance. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic cross-sectional view of the internal structure of the cable conduit body of this utility model;

[0021] Figure 3 This is a cross-sectional structural diagram of the main body of the cable conduit of this utility model;

[0022] Figure 4 This is a schematic cross-sectional view of the connection structure of the cable conduit body of this utility model;

[0023] Figure 5 For the present utility model Figure 4 Enlarged structural diagram at point A in the middle.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Cable conduit body; 101. Cable; 2. Protective components; 201. Flame retardant layer; 202. Heat insulation layer; 203. Inner rubber layer; 204. Outer rubber layer; 205. PVC plastic layer; 3. Support mechanism; 301. Connecting block; 302. Arc-shaped limiting plate; 303. Support frame No. 1; 304. Support frame No. 2. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0027] This utility model provides, for example Figures 1-5 The power cable conduit with a skeleton structure shown includes a cable conduit body 1, a cable 101 sleeved on the inner wall of the cable conduit body 1, a protective component 2 chemically bonded to the inner wall of the cable conduit body 1, and a support mechanism 3 mechanically connected to both ends of the outer wall of the cable conduit body 1, which penetrates the cable conduit body 1 to the inner wall of the protective component 2.

[0028] The protective component 2 includes a flame-retardant layer 201, which is located on the inner wall of the cable conduit body 1 and is sleeved and fitted to the outer wall of the cable 101. A heat insulation layer 202 is chemically bonded to the outer wall of the flame-retardant layer 201, an inner rubber layer 203 is chemically bonded to the outer wall of the heat insulation layer 202, an outer rubber layer 204 is chemically bonded to the outer wall of the inner rubber layer 203, and a PVC plastic layer 205 is chemically bonded to the outer wall of the outer rubber layer 204.

[0029] The support mechanism 3 includes a docking block 301. There are multiple docking blocks 301, which are mechanically connected to both sides of the outer wall of the cable pipe body 1. The outer wall of the docking block 301 is machined with an arc-shaped limiting plate 302, which extends into the interior of the cable pipe body 1. The inner wall of the flame retardant layer 201 is chemically bonded with a second support frame 304, which is sleeved and fitted to the outer wall of the cable 101. The inner rubber layer 203 and the outer rubber layer 204 are chemically bonded with a first support frame 303.

[0030] The cooperation between the internal parts of the protective component 2 facilitates the improvement of the fire resistance and sealing performance of the cable pipe body 1, protects the cable 101 on the inner wall of the cable pipe body 1, and enables the cable 101 to be used normally. The cooperation between the internal parts of the support mechanism 3 facilitates the improvement of the support performance of the cable pipe body 1, ensures that the cable pipe body 1 does not deform under long-term compression, and facilitates the interconnection between multiple cable pipe bodies 1.

[0031] Refer to the instruction manual appendix Figures 1-5 The outer walls of the cable conduit body 1 are connected and fixed with connecting flanges on both sides, and the inner wall of the cable conduit body 1 has a sealing ring for connecting with the cable 101. The connection of connecting flanges on both sides of the outer walls of the cable conduit body 1 and the sealing ring for connecting with the cable 101 on the inner wall of the cable conduit body 1 facilitates the interconnection of multiple cable conduit bodies 1 through connecting flanges and improves the sealing performance of the cable 101 inside the cable conduit body 1.

[0032] Refer to the instruction manual appendix Figures 1-5 The No. 2 support frame 304 and the No. 1 support frame 303 are distributed in a hollow mesh pattern on the inner wall of the flame-retardant layer 201 and the outer wall of the inner rubber layer 203, respectively. The main material of the No. 1 support frame 303 and the No. 2 support frame 304 is metal steel wire, and the surface of the No. 2 support frame 304 is chemically bonded with a rubber layer. The fact that the No. 2 support frame 304 and the No. 1 support frame 303 are distributed in a hollow mesh pattern on the inner wall of the flame-retardant layer 201 and the outer wall of the inner rubber layer 203 facilitates the improvement of the compression resistance of the cable pipe body 1. In addition, the No. 2 support frame 304 is in contact with the outer wall of the cable 101, which facilitates the sealing of the gap between the cable 101 and the cable pipe body 1.

[0033] Refer to the instruction manual appendix Figures 1-5 Both the inner rubber layer 203 and the outer rubber layer 204 are made of vinylon fiber, and there is a support groove between the inner walls of the inner rubber layer 203 and the outer rubber layer 204 that matches the first support frame 303. By using vinylon fiber in the inner rubber layer 203 and the outer rubber layer 204, and having a support groove between the inner walls of the inner rubber layer 203 and the outer rubber layer 204 that matches the first support frame 303, it is easy to place the first support frame 303 between the inner rubber layer 203 and the outer rubber layer 204.

[0034] Refer to the instruction manual appendix Figures 1-5The flame-retardant layer 201 is mainly made of polyvinyl chloride, and the heat insulation layer 202 is mainly made of phenolic resin. The fact that the flame-retardant layer 201 is mainly made of polyvinyl chloride and the heat insulation layer 202 is mainly made of phenolic resin makes it easier for the high temperature generated inside the cable 101 after long-term use to be isolated by the heat insulation layer 202, so that the outer wall of the cable pipe body 1 is kept at a suitable temperature, and the workers will not be burned by the outer wall of the cable pipe body 1 when they inspect and maintain the cable pipe body 1.

[0035] Refer to the instruction manual appendix Figures 1-5 The cable pipe body 1 has docking grooves at both ends that match the docking block 301 and the arc-shaped limiting plate 302, and the docking grooves have limiting grooves that match the arc-shaped limiting plate 302. By having docking grooves at both ends of the cable pipe body 1 that match the docking block 301 and the arc-shaped limiting plate 302, and the limiting grooves that match the arc-shaped limiting plate 302, it is convenient for multiple cable pipe bodies 1 to be docked and fixed to each other through the docking block 301.

[0036] The working principle of this practical application is as follows:

[0037] Refer to the instruction manual appendix Figures 1-5 The flame-retardant layer 201 is mainly made of polyvinyl chloride, and the heat insulation layer 202 is mainly made of phenolic resin. This allows the high temperature generated inside the cable 101 after long-term use to be isolated by the heat insulation layer 202, keeping the outer wall of the cable conduit body 1 at a suitable temperature. This prevents workers from being burned by the outer wall of the cable conduit body 1 during maintenance. The inner rubber layer 203 and the outer rubber layer 204 are both made of vinylon fiber, and there are support grooves between the inner walls of the inner rubber layer 203 and the outer rubber layer 204 that match the first support frame 303. This allows the first support frame 303 to be placed between the inner rubber layer 203 and the outer rubber layer 204, and also gives the inner rubber layer 203 and the outer rubber layer 204 a certain support strength. The inner rubber layer 203, the outer rubber layer 204, and the PVC plastic layer 205 can improve the sealing and waterproof performance of the outer wall of the cable conduit body 1.

[0038] Refer to the instruction manual appendix Figures 1-5By connecting two cable conduit bodies 1 together, the connecting blocks 301 on the outer wall of the cable conduit body 1, carrying arc-shaped limiting plates 302, penetrate into the interior of the cable conduit body 1. Simultaneously, the bolt holes on the connecting flanges on the outer wall of the cable conduit body 1 are staggered. Rotating the cable conduit body 1 causes the connecting groove to rotate, moving the arc-shaped limiting plates 302 penetrating the interior of the cable conduit body 1 into the limiting grooves. This completes the connection and fixation between the two cable conduit bodies 1, aligning the bolt holes on the connecting flanges on the outer wall of the cable conduit body 1, facilitating the connection between the two cable conduit bodies 1. The connection is fixed, and the No. 2 support frame 304 and the No. 1 support frame 303 are distributed in a hollow mesh pattern on the inner wall of the flame retardant layer 201 and the outer wall of the inner rubber layer 203, respectively. This facilitates the improvement of the compression resistance of the cable pipe body 1 through the No. 2 support frame 304 and the No. 1 support frame 303. Moreover, the No. 2 support frame 304 is in contact with the outer wall of the cable 101, which facilitates the sealing of the gap between the cable 101 and the cable pipe body 1. This improves the support performance of the cable pipe body 1, so that the cable pipe body 1 will not deform under long-term compression, thus improving the performance of the cable pipe body 1.

[0039] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A power cable conduit with a skeleton structure, characterized in that: It includes a cable pipe body (1), a cable (101) is sleeved on the inner wall of the cable pipe body (1), a protective component (2) is chemically bonded to the inner wall of the cable pipe body (1), and a support mechanism (3) is mechanically connected to both ends of the outer wall of the cable pipe body (1), and extends through the cable pipe body (1) to the inner wall of the protective component (2); The protective component (2) includes a flame-retardant layer (201), which is located on the inner wall of the cable conduit body (1) and is sleeved and attached to the outer wall of the cable (101). The outer wall of the flame-retardant layer (201) is chemically bonded with a heat insulation layer (202), the outer wall of the heat insulation layer (202) is chemically bonded with an inner rubber layer (203), the outer wall of the inner rubber layer (203) is chemically bonded with an outer rubber layer (204), and the outer wall of the outer rubber layer (204) is chemically bonded with a PVC plastic layer (205). The support mechanism (3) includes a docking block (301), and there are multiple docking blocks (301). The multiple docking blocks (301) are mechanically connected to both sides of the outer wall of the cable pipe body (1). The outer wall of the docking block (301) is machined with an arc-shaped limiting plate (302) that extends into the interior of the cable pipe body (1). The inner wall of the flame-retardant layer (201) is chemically bonded with a second support frame (304) and is sleeved and fitted to the outer wall of the cable (101). The inner rubber layer (203) and the outer rubber layer (204) are chemically bonded with a first support frame (303).

2. The power cable conduit with a skeleton structure according to claim 1, characterized in that: The outer walls of the cable pipe body (1) are fixed with connecting flanges on both sides, and the inner wall of the cable pipe body (1) has a sealing ring for connecting with the cable (101).

3. A power cable conduit with a skeleton structure according to claim 1, characterized in that: The second support frame (304) and the first support frame (303) are distributed in a hollow mesh pattern on the inner wall of the flame retardant layer (201) and the outer wall of the inner rubber layer (203), respectively. The first support frame (303) and the second support frame (304) are mainly made of metal steel wire, and the surface of the second support frame (304) is chemically bonded with a rubber layer.

4. A power cable conduit with a skeleton structure according to claim 1, characterized in that: The inner rubber layer (203) and the outer rubber layer (204) are both made of vinylon fiber, and a support groove matching the first support frame (303) is left between the inner walls of the inner rubber layer (203) and the outer rubber layer (204).

5. A power cable conduit with a skeleton structure according to claim 1, characterized in that: The flame retardant layer (201) is mainly made of polyvinyl chloride, and the heat insulation layer (202) is mainly made of phenolic resin.

6. A power cable conduit with a skeleton structure according to claim 1, characterized in that: The cable pipe body (1) has docking grooves at both ends that match the docking block (301) and the arc-shaped limiting plate (302), and the docking grooves have limiting grooves that match the arc-shaped limiting plate (302).

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