A sealing protection tube for buried cable

Abstract

This invention relates to the field of cable protection pipes, and more particularly to a sealed protective pipe for buried cables. The sealed protective pipe for buried cables of this invention has a two-layer protective structure consisting of an outer pipe and an inner pipe. The outer pipe is designed for detachable connection, and the inner pipes are connected by a telescopic tube with elastic deformation capability. A limiting spring is used to fix a section of cable inside the telescopic tube into a corrugated structure, allowing the cable to have some slack due to the corrugated structure. When encountering soil compression or bending due to its own suspension, the telescopic tube is stretched, straightening the corrugated structure of the cable. When the cable is straightened, the slack provided by its own corrugated structure can absorb external tensile strain, preventing the cable from being subjected to excessive tensile force. This solves the technical problem that buried cables are easily subjected to soil compression or suspension when encountering geological disasters, resulting in severe bending deformation and serious damage to the cable structure.

Description

Technical Field

[0001] This invention relates to the field of cable protection pipes, and more particularly to a sealed protection pipe for buried cables. Background Technology

[0002] In underground cable laying projects, the instability of the soil geological structure poses a severe challenge to the integrity of the cable. When the cable is located in a high-risk area for geological disasters, once a landslide or soil collapse is triggered, the cable faces complex risks of damage. When a landslide occurs, large blocks of rock and soil move rapidly downward under the action of gravity. This movement itself carries enormous kinetic energy. If the cable is fixed in its original position before the collapse, it is often difficult to keep relatively still with the rapidly moving soil, thus being subjected to great horizontal compression and impact forces. This compression can not only cause the cable to be flattened or cut, but may also cause the cable sheath to be punctured and broken by sharp rocks embedded in the soil. When a soil collapse occurs, the cable that was originally supported by the soil will instantly lose its support point and become suspended in the air. Under the action of gravity, the cable will fall sharply. This suspended fall may cause the cable to deform or break violently when it approaches the ground or collides with hard obstacles on the ground. Once the cable sheath is punctured, the internal conductor is exposed to damp or chemically corrosive soil, resulting in an electrical short circuit. Summary of the Invention

[0003] In order to overcome the problem that buried cables are prone to severe bending deformation or even structural damage when encountering geological disasters due to soil compression or falling from a height, this invention provides a sealed protective pipe for buried cables.

[0004] The present invention provides a sealed protective pipe for buried cables, comprising a plurality of outer pipes connected in sequence, the ends of two adjacent outer pipes being tightly abutted and connected to each other; each end of the outer pipe is provided with a sealing ring, the sealing rings of two adjacent outer pipe ends being tightly abutted to each other; an inner pipe is fixedly connected inside the outer pipe; a telescopic pipe is fixedly connected between two adjacent inner pipes, and the telescopic pipe is located between the interiors of two adjacent outer pipes; a plurality of limiting springs for restricting or maintaining the cable body in a corrugated structure are fixedly connected inside the telescopic pipe.

[0005] To further explain, the two ends of the outer tube are provided with several insert teeth, and the ends of two adjacent outer tubes are tightly connected together by insert teeth.

[0006] To further explain, the outer surface of the inner tube has several externally hollowed-out channels.

[0007] To further explain, a conductive sheet for monitoring the intrusion of water vapor is fixedly connected in the outer hollow channel structure; a current monitor for monitoring the change in resistance current of the conductive sheet is installed on the telescopic tube.

[0008] To further explain, the conductive sheet uses a carbon nanotube composite silicone material.

[0009] To further explain, the telescopic tube has several internal hollow channel structures that connect to the corresponding external hollow channels in the inner tubes on both sides.

[0010] To further explain, a moisture-absorbing and drying package is installed inside the hollowed-out channel.

[0011] To further explain, several parallel side rods are fixed to the front and rear sides of the outer tube.

[0012] To further explain, several fixing rings are fixed to the outer tube; several anchor rods are welded to the fixing rings.

[0013] To further explain, there are at least two barbed plates rotatably connected to the anchor bolt via a rotating shaft.

[0014] This invention discloses a sealed protective pipe for buried cables, comprising a two-layer protective structure of an outer pipe and an inner pipe. The outer pipe is designed for detachable connection, and the inner pipes are connected by a telescopic tube with elastic deformation capability. A section of cable located inside the telescopic tube is fixed into a corrugated structure by a limiting spring, allowing the cable to have a pre-existing slack through the corrugated structure. When encountering soil compression or bending due to its own suspension, the telescopic tube is stretched, straightening the corrugated structure of the cable. When the cable is straightened, the slack provided by its own corrugated structure can absorb external tensile strain, preventing the cable from being subjected to excessive tensile force. This not only solves the technical problem that buried cables are easily subjected to soil compression or suspension when encountering geological disasters, resulting in severe bending deformation and serious damage to the cable structure, but also provides several parallel side rods on the surface of the outer pipe. Together with the pulling force provided by the anchor rods and spikes deep in the soil, it can also prevent severe bending deformation of the suspended area of ​​the outer pipe in the event of a severe geological disaster. Attached Figure Description

[0015] Figure 1 The structural diagrams are provided to illustrate the present invention according to embodiments; Figure 2 The outer tube structure diagram of the present invention is shown according to the embodiments; Figure 3 This is a cross-sectional view illustrating the outer tube structure of the present invention according to an embodiment; Figure 4 This is a cross-sectional view illustrating the telescopic tube structure of the present invention according to an embodiment; Figure 5 This is a cross-sectional view illustrating the inner tube structure of the present invention according to an embodiment; Figure 6 The following is a diagram illustrating the anchor bolt structure of the present invention according to an embodiment.

[0016] Reference numerals: 1-Outer tube, 11-Side rod, 101-Sealing ring, 102-Insertion tooth, 2-Inner tube, 201-Outer hollow channel, 3-Telescopic tube, 301-Inner hollow channel, 4-Limiting spring, 51-Conductive sheet, 52-Current monitor, 6-Moisture-absorbing drying bag, 71-Fixing ring, 72-Anchor rod, 73-Barbed plate, 8-Cable body. Detailed Implementation

[0017] Although the invention may be described with respect to specific applications or industries, those skilled in the art will recognize its broader applicability. Those skilled in the art will understand that terms such as "above," "below," "upward," "downward," etc., are used to describe the drawings and not to indicate a limitation on the scope of the invention as defined by the appended claims. Any numerical designations such as "first" or "second" are merely illustrative and not intended to limit the scope of the invention in any way.

[0018] Example 1: A sealed protective pipe for buried cables in this example, such as... Figures 1-5 As shown, it includes an outer tube 1, an inner tube 2, a telescopic tube 3, and a limiting spring 4; it has several outer tubes 1, with adjacent outer tubes 1 tightly attached to each other and connected to each other; each outer tube 1 has a sealing ring 101 structure at both ends, and the sealing rings 101 at the ends of adjacent outer tubes 1 are tightly attached to each other, improving the sealing effect between the connection of adjacent outer tubes 1; each outer tube 1 has several insert teeth 102 structures at both ends, and the ends of adjacent outer tubes 1 are tightly inserted together by the insert teeth 102, improving the anti-loosening and fixing effect between the connection of adjacent outer tubes 1; each outer tube 1 has an inner tube 2 fixedly connected inside; each pair of adjacent inner tubes 2 is connected together by a telescopic tube 3, the diameter of the telescopic tube 3 is larger than the diameter of the inner tube 2, and the telescopic tube 3 spans the joint of adjacent outer tubes 1; each telescopic tube 3 has several limiting springs 4 fixedly connected inside.

[0019] like Figure 4 and Figure 5 As shown, each inner tube 2 has several external hollow channels 201 structures on its outer surface; each external hollow channel 201 structure has a conductive sheet 51 fixedly connected to it; each telescopic tube 3 has two current monitors 52 installed on the left and right sides, and each current monitor 52 has a built-in wireless signal transceiver module; each conductive sheet 51 is electrically connected to the corresponding current monitor 52.

[0020] The cable body 8 is run between all the inner tubes 2 and the telescopic tubes 3. The limiting spring 4 constrains a section of the cable body 8 located inside the telescopic tube 3 into a wave-shaped structure. At this time, the cable body 8 is reserved for slack through the wave structure in multiple areas. The inner tubes 2 and the telescopic tubes 3, as well as the cable body 8 running inside them, are buried in the soil below the ground along with the outer tube 1. The current monitor 52 periodically energizes the conductive sheet 51 and monitors the changes in electrical parameters of the circuit where the conductive sheet 51 is located.

[0021] When a landslide causes soil to compress any area of ​​the outer pipe 1, or when a geological collapse causes any area of ​​the outer pipe 1 to lose soil support and become suspended and bent, the outer pipe 1 at the location of the geological disaster will be subjected to axial tensile force, causing the insert teeth 102 between two adjacent outer pipes 1 to separate. At this time, the outer pipe 1 in the geological disaster will drive the inner pipe 2 to pull the telescopic pipe 3 outward and stretch. At the same time, the inner pipe 2 will straighten the corrugated structure of the cable body 8. The cable body 8 will drive the limiting spring 4 to bend and deform. When the cable body 8 is straightened, the reserved slack can be used to absorb the external tensile strain, avoiding the cable body 8 from being directly subjected to excessive tensile force, thus providing anti-pull protection for the cable body 8, and waiting for maintenance personnel to come and carry out subsequent maintenance work.

[0022] When moisture enters the outer tube 1, the moisture that directly enters the outer perforated channel 201 comes into contact with the conductive sheet 51. At this time, the intruding moisture will reduce the conductivity of the conductive sheet 51. When the current monitor 52 periodically monitors the conductivity of the conductive sheet 51, it will detect that the resistance of the conductive sheet 51 has decreased and the current has increased. Thus, it is determined that moisture has entered the outer tube 1 in the area of ​​the conductive sheet 51. The monitor will then send an abnormality notification signal to the signal receiving terminal carried by the maintenance personnel through the built-in wireless signal transceiver module, and wait for the maintenance personnel to come and carry out subsequent maintenance work.

[0023] Example 2, based on Example 1 above, as follows: Figures 1-5As shown in this embodiment, a sealed protective tube for buried cables uses carbon nanotube composite silicone material for each conductive sheet 51. This material can function as both a sensor for monitoring changes in resistance current and a heating element, achieving a high degree of functional integration. Each telescopic tube 3 has several internal hollow channels 301. Each internal hollow channel 301 is connected to a corresponding external hollow channel 201 in the inner tubes 2 on both sides. Each internal hollow channel 301 contains a moisture-absorbing drying pack 6. When the current monitor 52 detects a high concentration of [something] in the area of ​​the external hollow channel 201 where a conductive sheet 51 is located... When moisture enters, the current monitor 52 electrically heats the conductive sheet 51, heating the moisture intruded into the outer hollow channel 201 corresponding to the conductive sheet 51 to a high temperature. At this time, a pressure gradient difference is generated between the high-temperature intruded moisture and the unheated inner hollow channel 301 due to the temperature difference. The high pressure is in the heated area and the low pressure is in the unheated area. Driven by this pressure gradient difference, the high-temperature intruded moisture will actively flow into the inner hollow channel 301, where the moisture-absorbing drying pack 6 absorbs the intruded moisture. Thus, before maintenance personnel arrive, the intruded moisture is initially adsorbed and dried, delaying the damage.

[0024] Example 3, based on Example 1 above, as follows: Figures 1-6 As shown in this embodiment, a sealed protective pipe for buried cables has several parallel side rods 11 fixedly connected to the front and rear sides of each outer pipe 1; several fixing rings 71 are fixedly connected to each outer pipe 1; several anchor rods 72 are welded to each fixing ring 71; two barbed plates 73 are rotatably connected to each anchor rod 72 via a rotating shaft; the side rods 11 on the outer pipe 1 and the anchor rods 72 and barbed plates 73 connected to the fixing rings 71 are all buried below the ground. When a geological disaster occurs and the soil in a local area of ​​the buried outer pipe 1 collapses, the outer pipe 1 in the collapsed area will be suspended and fall, and the outer pipe 1 will be subjected to axial tensile force, causing mutual tension between the side rods 11 and the surrounding soil. The force exerted by the anchor rod 72 on the suspended section of the outer pipe 1 provides an upward tensile force, reducing the degree of downward bending deformation in the suspended area of ​​the outer pipe 1. The anchor rod 72 connected to the outer pipe 1 through the fixing ring 71 can be inserted deeper into the soil. At the same time, the barbed plate 73 on the anchor rod 72 acts as a barb structure to firmly embed the anchor rod 72 into the soil. In the event of a serious geological disaster that causes a large area of ​​the soil where the outer pipe 1 is buried to collapse, the anchor rod 72 connected to the part of the outer pipe 1 that is normally buried in the soil can generate greater frictional resistance with the soil. This frictional resistance can provide a stronger tensile force to the large area of ​​the outer pipe 1 that is suspended, avoiding serious downward bending deformation in the suspended area of ​​the outer pipe 1.

[0025] Although the invention has been described with reference to exemplary embodiments, it should be understood that the invention is not limited to the disclosed exemplary embodiments. The scope of the following claims should be given the broadest interpretation so as to cover all variations and equivalent structures and functions.

Claims

1. A sealed protective pipe for buried cables, comprising a plurality of outer pipes (1) connected in sequence, wherein the ends of two adjacent outer pipes (1) are tightly attached to each other and connected; Its characteristics are: It also includes an inner tube (2), a telescopic tube (3) and a limiting spring (4); the inner tube (2) is fixedly connected inside the outer tube (1); a telescopic tube (3) is fixedly connected between two adjacent inner tubes (2), and the telescopic tube (3) is located inside the joint of two adjacent outer tubes (1); a number of limiting springs (4) are fixedly connected inside the telescopic tube (3) to restrict the cable body (8) to a wave-shaped structure; each end of the outer tube (1) is provided with a sealing ring (101), and the sealing rings (101) at the ends of two adjacent outer tubes (1) are tightly attached to each other.

2. A sealed protective pipe for buried cables according to claim 1, characterized in that: The two ends of the outer tube (1) are provided with several insert teeth (102) structures, and the ends of two adjacent outer tubes (1) are tightly connected together by insert teeth (102).

3. A sealed protective pipe for buried cables according to claim 1, characterized in that: The outer surface of the inner tube (2) has several external hollow channels (201) structure.

4. A sealed protective pipe for buried cables according to claim 3, characterized in that: A conductive sheet (51) for monitoring the intrusion of water vapor is fixed in the structure of the outer hollow channel (201); a current monitor (52) for monitoring the change of current in the circuit where the conductive sheet (51) is located is installed on the telescopic tube (3).

5. A sealed protective pipe for buried cables according to claim 4, characterized in that: The conductive sheet (51) uses carbon nanotube composite silicone material.

6. A sealed protective pipe for buried cables according to claim 5, characterized in that: The telescopic tube (3) has several internal hollow channels (301) structures that connect to the corresponding external hollow channels (201) in the inner tubes (2) on both sides.

7. A sealed protective pipe for buried cables according to claim 6, characterized in that: A moisture-absorbing and drying package (6) is provided inside the hollow channel (301).

8. A sealed protective pipe for buried cables according to any one of claims 1-7, characterized in that: Several parallel side rods (11) are fixed to the front and rear sides of the outer tube (1).

9. A sealed protective pipe for buried cables according to claim 8, characterized in that: Several fixing rings (71) are fixedly connected to the outer tube (1); several anchor rods (72) are welded to the fixing rings (71).

10. A sealed protective pipe for buried cables according to claim 9, characterized in that: The anchor bolt (72) is rotatably connected to at least two barbed plates (73) via a rotating shaft.

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