Power cable protection tube for easy installation

Abstract

This application discloses an easy-to-install power cable protection pipe, including an outer pipe. The outer pipe is composed of two semi-outer pipe bodies, a first and a second, assembled together. Both the first and second semi-outer pipe bodies have V-shaped elastic supports on their inner sides. The middle of each elastic support is connected to the inner wall of either the first or second semi-outer pipe body, and both ends are connected to inner pipe bodies. The two inner pipe bodies form an inner pipe through which the cable passes. The first semi-outer pipe body has buckles on both sides, and the second semi-outer pipe body has grooves on both sides that mate with the buckles. A sealing element is provided between the first and second semi-outer pipe bodies. A pressure control component is provided between the elastic support and the corresponding inner pipe body to support the elastic support and pressurize the sealing element. When the outer pipe is subjected to external impact or bending, the pressure control component pressurizes the sealing element, causing it to expand and improving the tightness of the fit between the two mating sealing elements, thereby ensuring a tight seal.

Description

Technical Field

[0001] This application relates to the technical field of cable conduits, and in particular to a power cable protection conduit that is easy to install. Background Technology

[0002] Cable protection pipes are widely used in the field of cable laying and protection. With the continuous development of industries such as power and communications, the demand for cable protection is increasing daily. Cable protection pipes provide physical protection for cables, preventing them from being damaged by external mechanical forces and chemical corrosion, ensuring their normal operation, and playing a crucial role in the stability and safety of the entire power and communication system. At the same time, with the acceleration of urban construction and the improvement of various infrastructures, the scale and complexity of cable laying are constantly increasing, which places higher demands on the performance and ease of installation of cable protection pipes.

[0003] The current installation method for cable protection conduits involves inserting a single cable or multiple cables through one end of the conduit, with multiple conduits fixed together by end threads or welding. This method is inconvenient for installation and subsequent maintenance. While existing cable protection conduits include split-type conduits, which improve the ease of installation and maintenance, these split-type conduits lack overall support and sealing. They are susceptible to cable damage and sealing problems when subjected to external impacts or bending, affecting the efficiency and quality of cable laying and maintenance. Summary of the Invention

[0004] The purpose of this application is to provide an easy-to-install power cable protection pipe to solve the problems of insufficient overall support and sealing of split protection pipes.

[0005] The power cable protection pipe provided in this application adopts the following technical solution for easy installation: An easy-to-install power cable protection pipe includes an outer pipe, which is composed of two semi-outer pipe bodies, a first and a second, assembled together. Both the first and second semi-outer pipe bodies have V-shaped elastic supports on their inner sides. The middle of each elastic support is connected to the inner wall of either the first or the second semi-outer pipe body, and both ends are connected to inner pipe bodies. The two inner pipe bodies form an inner pipe through which the cable passes. The first semi-outer pipe body has buckles on both sides, and the second semi-outer pipe body has grooves on both sides that mate with the buckles. A sealing element is provided between the first and second semi-outer pipe bodies. A pressure control component is provided between the elastic support and the corresponding inner pipe body to support the elastic support and pressurize the sealing element.

[0006] By adopting the above technical solution, the inner sides of the two semi-inner tubes are enclosed to form an inner tube through which the cable passes. The engagement of the snap-fit ​​and the slot allows for the rapid assembly of the two separate semi-outer tubes. An elastic support component is positioned between the outer and inner tubes. When the outer tube is subjected to external impact or bending, the elastic support component can undergo elastic deformation and maintain a tendency to elastically return to its original position, continuously supporting the outer tube. Under the protection of the inner tube, this reduces the direct impact of external forces on the cable. Furthermore, during the deformation of the elastic support component, the pressure control component can pressurize the sealing element, causing it to expand and improving the tightness of the fit between the two mating sealing elements, thereby ensuring a tight seal.

[0007] Optionally, both sides of the first semi-outer tube body are provided with extension portion one, and both sides of the second semi-outer tube body are provided with extension portion two. The buckle is provided on the extension portion one, the slot is provided on the extension portion two, and the sealing element is a sealing gasket provided on the opposite side of the extension portion one and the corresponding extension portion two.

[0008] By adopting the above technical solution, extension part one and corresponding extension part two are aligned and fitted, the buckle and the slot are fitted, the buckle head abuts against the outside of extension part two, and the two corresponding sealing gaskets abut against each other. After the sealing gaskets are pressurized, the fit is improved, and the force of the buckle head abutting against the outside of extension part two is also increased, thereby increasing the stability of the assembly of semi-outer tube body one and semi-outer tube body two.

[0009] Optionally, the sealing gasket is provided with a relief groove through which the buckle passes.

[0010] By adopting the above technical solution, the slot facilitates the buckle to pass through and engage with the slot, while the sealing gasket can also clamp the buckle when it is pressurized, keeping the buckle stable and improving the stability of the buckle and slot engagement when the outer tube is subjected to external force.

[0011] Optionally, the pressure control assembly includes an elastic airbag embedded in the corresponding sealing gasket, a telescopic air component disposed between the elastic support and the corresponding semi-inner tube, and an air tube connecting the elastic airbag and the telescopic air component.

[0012] By adopting the above technical solution, when the elastic support deforms under force, it compresses the telescopic gas component to squeeze the gas, which then enters the elastic air bladder through the air pipe. The elastic air bladder expands, thereby causing the sealing gasket to expand. After the elastic support returns to its elastic state, it drives the telescopic gas component to draw in air, which then flows back through the air pipe, ensuring the sealing gasket returns to its original position in a timely manner and guaranteeing its lifespan.

[0013] Optionally, the telescopic gas component includes an air storage pipe and a piston. The air storage pipe is provided with an air storage groove, and the piston is movably disposed in the air storage groove. One end of the air pipe is connected to the air storage groove and the other end is connected to the elastic airbag. One end of the piston is connected to the middle part of the elastic support component.

[0014] By adopting the above technical solution, when the elastic support is deformed by force, it will drive the piston to move into the air storage tank, and the gas squeezed in the air storage tank will flow from the air pipe to the elastic air bag; after the elastic support is elastically reset, it will drive the piston to move out of the air storage tank, and the gas in the elastic air bag will flow into the air storage tank through the air pipe.

[0015] Optionally, the side wall of the buckle is provided with a limiting groove, and the groove wall of the relief groove is provided with an elastic protrusion that cooperates with the limiting groove.

[0016] By adopting the above technical solution, when the sealing gasket is pressurized and expanded, the elastic protrusion protrudes and engages with the corresponding limiting groove. While the groove wall of the limiting groove abuts against the buckle, the cooperation between the elastic protrusion and the limiting groove further improves the stability of the buckle and the groove.

[0017] Optionally, the two sides of the semi-inner tube are provided with positioning blocks and positioning grooves that cooperate with the corresponding positioning blocks.

[0018] By adopting the above technical solution, the positioning block of one half of the inner tube body cooperates with the positioning groove of the other half of the inner tube body to improve the stability of the cooperation between the two half of the inner tube body.

[0019] Optionally, the first extension is provided with a guide block, and the second extension is provided with a guide groove that cooperates with the guide block.

[0020] By adopting the above technical solution, the cooperation between the guide block and the guide groove improves the stability of the cooperation between the first and second semi-outer tube bodies and the cooperation between the buckle and the groove.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. The inner sides of the two semi-inner tubes enclose each other to form an inner tube through which the cable passes. The engagement of the snap-fit ​​and slot allows for quick assembly of the two separate semi-outer tubes. An elastic support component is positioned between the outer and inner tubes. When the outer tube is subjected to external impact or bending, the elastic support component can undergo elastic deformation and maintain a tendency to elastically return to its original position, continuously supporting the outer tube. Under the protection of the inner tube, this reduces the direct impact of external forces on the cable. Furthermore, during the deformation of the elastic support component, the pressure control component can pressurize the seals, causing them to expand and improving the tightness of the fit between the two mating seals, thereby ensuring a tight seal. 2. When the elastic support deforms under stress, it compresses the telescopic gas component, squeezing the gas and allowing it to enter the elastic airbag through the air pipe. The expansion of the elastic airbag then causes the sealing gasket to expand. After the elastic support returns to its elastic state, it again drives the telescopic gas component to draw in air, which flows back through the air pipe, ensuring the sealing gasket returns to its original position and extending its lifespan. When the elastic support deforms under stress, it moves the piston into the air reservoir, compressing the gas in the reservoir and causing it to flow from the air pipe into the elastic airbag. After the elastic support returns to its elastic state, it moves the piston out of the air reservoir, causing the gas inside the elastic airbag to flow through the air pipe into the air reservoir. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of Embodiment 2 of this application; Figure 2 This is a cross-sectional schematic diagram of Embodiment 2 of this application; Figure 3 This is a schematic diagram of the structure of the second semi-outer tube body according to Embodiment 2 of this application; Figure 4 This is a partial cross-sectional schematic diagram of Embodiment 2 of this application.

[0023] Explanation of reference numerals in the attached drawings: 1. Semi-outer tube body one; 11. Buckle; 12. Extension part one; 13. Limiting groove; 14. Guide groove; 2. Semi-outer tube body two; 21. Slot; 22. Extension part two; 23. Guide block; 3. Elastic support component; 4. Semi-inner tube body; 41. Positioning block; 42. Positioning groove; 5. Pressure control component; 51. Elastic airbag; 52. Air tube; 53. Air storage tube; 54. Piston; 55. Air storage tank; 6. Sealing gasket; 61. Relief groove; 62. Elastic protrusion. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1 - Appendix Figure 4 This application will be described in further detail.

[0025] Embodiment 1 of this application discloses a power cable.

[0026] A power cable includes three power conductors and an optical fiber unit disposed in the central gap between the three power conductors. The three power conductors are arranged in a triangular twisted pattern. Each power conductor, from the inside out, includes a conductor, a conductor shielding layer, an insulation layer, an insulation shielding layer, and a metal shielding layer. After the three power conductors and the optical fiber unit are cabled together, the outer periphery is sequentially covered with an inner lining layer, an armor layer, and an outer sheath. The insulation layer uses water-tree resistant cross-linked polyethylene insulation material with added composite nano-modified filler. The optical fiber unit includes communication optical fiber and distributed sensing optical fiber. The composite nano-modified filler is a mixture of nano-montmorillonite and nano-silica surface-treated with silane coupling agent, with a mass ratio of nano-montmorillonite to nano-silica of 1:1. The total amount of composite nano-modified filler added is 1.0% to 1.5% of the total mass of the water-tree resistant cross-linked polyethylene insulation material. The distributed sensing optical fiber realizes distributed temperature monitoring, strain monitoring, and vibration monitoring along the entire length of the cable through Brillouin optical time-domain reflectometry and / or phase-sensitive optical time-domain reflectometry. The conductor has a nominal cross-sectional area of ​​400 mm² and adopts a layered, tightly stranded copper conductor structure, consisting of four layers. From the inside out, the number of monofilaments in each layer is 6, 12, 18, and 24 respectively, with the stranding direction alternating layer by layer. The conductor compaction coefficient is ≥0.91, and the conductor DC resistance at 20℃ is ≤0.0470 Ω / km. The conductor shielding layer, insulation layer, and insulation shielding layer are formed by a continuous extrusion cross-linking production line using a catenary system. The nominal thickness of the insulation layer is 10.5 mm, the insulation eccentricity is ≤1.5%, and the dielectric loss tangent of the insulation layer at 90℃ is ≤0.0009. The optical cable unit contains eight optical fibers, including six single-mode communication fibers and two distributed sensing fibers. The eight fibers are encapsulated in a stainless steel loose tube filled with thixotropic fiber grease. The stainless steel loose tube is then covered with an aramid yarn reinforcement layer and a polyethylene sheath. The metallic shielding layer is a copper strip shielding layer with a nominal thickness of 0.12 mm and a copper strip overlap rate of ≥15%. The armor layer is a single-layer galvanized steel wire armor layer with a wire diameter of 3.15 mm. The outer sheath is a flame-retardant polyethylene sheath containing a composite flame-retardant synergistic system, with a nominal thickness of 3.5 mm. Water-blocking yarn and semi-conductive resistive adhesive are filled in the gaps between the three power conductor cores and the optical cable unit. Water-absorbing and expanding water-blocking yarn is embedded between the conductor layers, and the water permeability length of the conductor is ≤0.8 m after 24 hours under 1.0 MPa water pressure. The conductor shielding layer and the insulation shielding layer use ultra-smooth cross-linked semi-conductive shielding material with a volume resistivity ≤1×10³Ω·m; the nominal thickness of the conductor shielding layer is 0.8 mm, and the nominal thickness of the insulation shielding layer is 0.8 mm.

[0027] Embodiment 2 of this application discloses a power cable protection pipe that is easy to install.

[0028] Reference Figure 1 , Figure 2An easy-to-install power cable protection pipe includes an outer pipe made of an elastic material. The outer pipe consists of two semi-outer pipe bodies 1 and 2, both of which are semi-circular. The inner sides of both semi-outer pipe bodies 1 and 2 are provided with V-shaped elastic support members 3. The elastic support members 3 are made of an elastic material, and their middle parts are connected to the inner wall of either semi-outer pipe body 1 or 2, while their two ends are connected to semi-inner pipe bodies 4. The two semi-inner pipe bodies 4 are aligned and assembled to form an inner pipe for the cable to pass through. The semi-inner pipe bodies 4 are also made of an elastic material, and their two sides are integrally formed with positioning blocks 41 and positioning grooves 42 that engage with the corresponding positioning blocks 41.

[0029] Reference Figure 2 , Figure 3 Both sides of the outer tube 1 are provided with integrally formed buckles 11, and both sides of the outer tube 2 are provided with slots 21 that cooperate with the buckles 11. A sealing element is provided between the outer tube 1 and the outer tube 2. A pressure control component 5 that can pressurize the sealing element is provided between the elastic support 3 and the corresponding inner tube 4.

[0030] Reference Figure 2 , Figure 3 Both sides of the first semi-outer tube 1 are integrally formed with extension portions 12, and both sides of the second semi-outer tube 2 are integrally formed with extension portions 22. A buckle 11 is disposed on the extension portion 12, and a slot 21 is formed in the extension portion 22. The sealing element is a sealing gasket 6 embedded on the opposite side of the extension portion 12 and the corresponding extension portion 22. The sealing gasket 6 has a clearance groove 61 for the buckle 11 to pass through. A limiting groove 13 is formed on the side wall of the buckle 11, and an elastic protrusion 62 that mates with the limiting groove 13 is integrally formed on the groove wall of the clearance groove 61. A guide block 23 is integrally formed on one side of the extension portion 12, and a guide groove 14 that mates with the guide block 23 is formed on one side of the extension portion 22.

[0031] Reference Figure 2 , Figure 3 and Figure 4 The pressure control assembly 5 includes an elastic airbag 51 embedded in a corresponding sealing gasket 6, a telescopic air component disposed between the elastic support 3 and the corresponding semi-inner tube 4, and an air pipe 52 connecting the elastic airbag 51 and the telescopic air component. The telescopic air component includes an air storage pipe 53 and a piston 54. One end of the air storage pipe 53 is fixedly connected to the outer wall of the semi-inner tube 4, and the other end has an air storage groove 55 extending along its own length. The piston 54 is movably connected in the air storage groove 55. One end of the air pipe 52 is connected to the air storage groove 55 and the other end is connected to the elastic airbag 51. One end of the piston 54 is fixedly connected to the middle of the elastic support 3.

[0032] The implementation principle of the easy-to-install power cable protection pipe in Embodiment 2 of this application is as follows: The inner sides of the two semi-inner tubes 4 enclose each other to form an inner tube through which the cable passes. The engagement of the buckle 11 and the slot 21 enables the quick assembly of the separate semi-outer tube 1 and semi-outer tube 2. The elastic support 3 supports the outer tube and the inner tube. When the outer tube is impacted or bent by external force, the elastic support 3 can generate elastic deformation and maintain an elastic return tendency, continuously supporting the outer tube and reducing the direct impact of external force on the cable under the protection of the inner tube. Furthermore, during the deformation of the elastic support 3, the pressure control component 5 can pressurize the seal to expand the seal, improving the tightness of the fit between the two mating seals, thereby ensuring the seal.

[0033] When the elastic support 3 deforms under force, it compresses the telescopic gas component to squeeze the gas, causing the gas to enter the elastic airbag 51 through the air pipe 52. After the elastic airbag 51 expands, it causes the sealing gasket 6 to expand. After the elastic support 3 elastically returns to its original position, it causes the telescopic gas component to draw in air, and the gas flows back through the air pipe 52, allowing the sealing gasket 6 to return to its original position in a timely manner, ensuring the life of the sealing gasket 6. When the elastic support 3 deforms under force, it causes the piston 54 to move into the air storage tank 55, squeezing the gas in the air storage tank 55 and causing it to flow from the air pipe 52 to the elastic airbag 51. After the elastic support 3 elastically returns to its original position, it causes the piston 54 to move out of the air storage tank 55, causing the gas in the elastic airbag 51 to flow into the air storage tank 55 through the air pipe 52.

[0034] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A power cable protection pipe that is easy to install, characterized in that: The system includes an outer tube, which consists of two semi-outer tube bodies (1 and 2) assembled together. Both the first (1) and the second (2) have a V-shaped elastic support member (3) on their inner sides. The middle of the elastic support member (3) is connected to the inner wall of either the first (1) or the second (2), and both ends are connected to a semi-inner tube body (4). The two semi-inner tube bodies (4) together form an inner tube through which the cable passes. Both sides of the first semi-outer tube (1) are provided with buckles (11), both sides of the second semi-outer tube (2) are provided with slots (21) that cooperate with the buckles (11), a sealing element is provided between the first semi-outer tube (1) and the second semi-outer tube (2), and a pressure control component (5) is provided between the elastic support (3) and the corresponding inner semi-tube (4) to support the elastic support (3) and pressurize the sealing element.

2. The easy-to-install power cable protection pipe according to claim 1, characterized in that: Both sides of the first semi-outer tube (1) are provided with extension part 1 (12), both sides of the second semi-outer tube (2) are provided with extension part 2 (22), the buckle (11) is provided on the extension part 1 (12), the slot (21) is provided on the extension part 2 (22), and the sealing element is a sealing gasket (6) provided on the opposite side of the extension part 1 (12) and the corresponding extension part 2 (22).

3. The easy-to-install power cable protection pipe according to claim 2, characterized in that: The sealing gasket (6) is provided with a relief groove (61) through which the buckle (11) passes.

4. The easy-to-install power cable protection pipe according to claim 3, characterized in that: The pressure control assembly (5) includes an elastic airbag (51) embedded in the corresponding sealing gasket (6), a telescopic air member disposed between the elastic support member (3) and the corresponding semi-inner tube (4), and an air tube (52) connecting the elastic airbag (51) and the telescopic air member.

5. The easy-to-install power cable protection pipe according to claim 4, characterized in that: The telescopic gas component includes an air storage pipe (53) and a piston (54). The air storage pipe (53) is provided with an air storage groove (55). The piston (54) is movably disposed in the air storage groove (55). One end of the air pipe (52) is connected to the air storage groove (55) and the other end is connected to the elastic airbag (51). One end of the piston (54) is connected to the middle part of the elastic support member (3).

6. The easy-to-install power cable protection pipe according to claim 3, characterized in that: The side wall of the buckle (11) is provided with a limiting groove (13), and the groove wall of the relief groove (61) is provided with an elastic protrusion (62) that cooperates with the limiting groove (13).

7. The easy-to-install power cable protection pipe according to claim 1, characterized in that: The two sides of the semi-inner tube (4) are provided with positioning blocks (41) and positioning grooves (42) that cooperate with the corresponding positioning blocks (41).

8. The easy-to-install power cable protection pipe according to claim 2, characterized in that: The first semi-outer tube (12) is provided with a guide block (23), and the second extension (22) is provided with a guide groove (14) that cooperates with the guide block (23).

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