Protective tube with wiring fixing function and method for forming same

Abstract

A protective tube with a wiring fixing function that prevents wiring from being pulled out and a method for forming the same are provided. [Solution] Provided is a protective pipe (10A) with a wiring fixing function, which is formed in at least a partial section of a protective pipe (5) through which wiring (4) connecting equipment within a facility is inserted, and the pipe within the section is filled with and hardened by a hardening material (12) while surrounding the wiring, and the wiring (4) is fixed to the protective pipe within the section via the hardening material (12). Such a protective pipe (10A) is formed by a method including the steps of: forming a cover (14) or an equivalent part that blocks the protective pipe at least one point using a low-permeability material that does not allow the hardening material to pass through before hardening; and injecting the hardening material before hardening into the inside of the pipe that is blocked at least one point by the cover (14) or an equivalent part while the wiring (4) is inserted through the protective pipe.

Description

[Technical Field]

[0001] The present invention relates to a protective tube with a wiring fixing function and a method for forming the same. [Background technology]

[0002] Generally, a solar power generation facility includes a plurality of solar panels and a collector box that collects electricity generated by the solar panels, and the solar panels and the collector box are connected via conductive wiring (electric wires or cables). The conductive wiring is inserted into a protective pipe buried underground within the facility, one end of the protective pipe is led out above ground and one end of the wiring is connected to the solar panel, and the other end of the protective pipe is also led out above ground and the other end of the wiring is connected to the collector box.

[0003] As an example of the above-described protective pipe, through which wiring is inserted and which is buried underground, the technology disclosed in Patent Document 1 below is known. In such solar power generation facilities, the recent rise in copper prices has led to frequent thefts of wiring containing copper conductors. Theft of wiring not only results in the loss of the wiring itself, but also in the need for significant costs to repair the facility. Furthermore, even if theft does not occur, solar power generation facility managers are forced to invest in equipment to prevent theft, such as installing surveillance cameras. As such, the fact that solar power generation facility managers are suffering large direct and indirect economic losses has become a problem. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-240082 Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, wire theft can be carried out by cutting the wire at the point where it is led above ground and connected to the solar panel or current collection box, and at a handhole (manhole) provided in the middle of the protective pipe for wiring inspection, and then pulling out the wire above ground. However, the technology disclosed in the above-mentioned Patent Document 1 does not have a structure to prevent the wire from being pulled out.

[0006] Therefore, there has been a demand for a means for preventing the theft of wires by preventing the above-described pulling out of wires, thereby delaying the theft of wires and causing those attempting to steal wires to abandon the theft, thereby ultimately preventing the theft of wires. In view of the above problems, the present invention aims to provide a protective tube with a wire fixing function that prevents wires from being pulled out, and a method for forming the same. [Means for solving the problem]

[0007] In order to solve the above-mentioned problems, the present invention provides a protective tube with a wiring fixing function, which has a conduit and protects wiring that passes through the conduit, and in which wiring connecting equipment within a facility is formed in at least a section of the protective tube that passes through the conduit, and the conduit within the section is filled with and hardened with a hardening material that surrounds the wiring, and the wiring is fixed to the protective tube within the section via the hardening material.

[0008] Furthermore, in order to solve the above-mentioned problems, the present invention provides a method for forming a protective tube with a wiring fixing function, which includes the steps of: forming a lid or an equivalent part that blocks the conduit of the protective tube at at least one point using a low-permeability material that does not allow the hardened material to pass through before hardening; and injecting the hardened material before hardening into the inside of the conduit that is blocked at at least one point by the lid or an equivalent part while the wiring is being inserted through the conduit of the protective tube. [Effects of the Invention]

[0009] According to the present invention, it is possible to delay the theft of wiring and to prevent the theft of wiring. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a schematic diagram showing a photovoltaic power generation facility as an example of a facility in which some embodiments of a protective pipe with a wiring fixing function according to the present invention are adopted. [Figure 2] 1 is a diagram showing a cross section of an embodiment of a protective tube with a wiring fixing function according to the present invention when cut along a longitudinal axis. [Figure 3] 3 is a diagram showing a cross section of the embodiment of the protective tube with a wiring fixing function shown in FIG. 2 cut along the radial direction. FIG. [Figure 4] 1A to 1C are diagrams schematically illustrating a method for forming an embodiment of a protective tube with a wiring fixing function according to the present invention. [Figure 5] Continuing from FIG. 4, FIG. 5 is a diagram schematically showing a method for forming an embodiment of a protective tube with a wiring fixing function according to the present invention. [Figure 6] 10A and 10B are diagrams showing an example of an end cap made of a low-permeability material used in the process of forming an embodiment of a protective tube with a wiring fixing function according to the present invention. [Figure 7] 10A and 10B are diagrams showing another example of an end cap made of a low-permeability material used in the process of forming an embodiment of a protective tube with a wiring fixing function according to the present invention. [Figure 8] 1 is a diagram showing a cross section of an embodiment of a partial protective tube that is a part of a protective tube that is buried underground to protect wiring, cut along the longitudinal axis. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0011] Next, an embodiment of a protective pipe with a wiring fixing function according to the present invention will be described in detail with reference to the accompanying drawings. Referring to Fig. 1, an embodiment of a protective pipe with a wiring fixing function 10 according to the present invention is employed as part of a protective pipe 5 buried underground 100 in a photovoltaic power generation facility 1 or the like.

[0012] A solar power generation facility 1, cited as an example of a facility in which a protective pipe 10 with wiring fixing function is used, comprises a plurality of solar panels 2 and a collector box 3 that collects electricity generated by the solar panels 2, and conductive wiring 4 connecting the solar panels 2 and the collector box 3 is inserted into a protective pipe 5 buried underground 100 within the facility 1, one end of the protective pipe 5 is led out to the ground and one end of the wiring 4 is connected to the solar panel 2, and the other end of the protective pipe 5 is also led out to the ground and the other end of the wiring 4 is connected to the collector box 3.

[0013] Additionally, a handhole 6 for inspecting the wiring 4 is provided in the middle of the protective pipe 5. In the example facility shown in FIG. 1, two handholes 6A and 6B are clearly shown. Note that reference numerals 6a and 6b are covers for the handholes 6A and 6B, respectively. Of course, the number of handholes 6 provided in the solar power generation facility 1 is optional.

[0014] In this application, "wiring" refers to an electric wire or cable. Here, an "electric wire" refers to an insulated core wire having a conductor and an insulating coating formed around the conductor, and a "cable" refers to a wire having at least one insulated core wire consisting of a conductor and an insulating coating formed around the conductor, and further having a sheath formed around the insulating coating. Each of the conductors is made of, for example, copper. Examples of the wiring 4 in this embodiment include solar cables and other wiring used for wiring solar panels 2 in a solar power generation facility 1.

[0015] The protective tube 5 may be a known corrugated tube made of resin with recesses and protrusions formed on its outer surface. The protective tube 5 can also be called a "tubular member." An example of a tubular member is an FEP (Flexible Electric Pipe) pipe (also called a "corrugated rigid polyethylene pipe"). With this configuration, the protective tube 5 adequately protects the wiring 4 passing through the conduit inside it.

[0016] 1, various embodiments of the protective pipe 10 with a wiring fixing function are indicated by reference numerals 10A, 10B, and 10C. However, these are merely examples of possible embodiments. Any number of protective pipes 10 with a wiring fixing function of various embodiments can be installed in any part of the protective pipe 5 depending on the installation state of the photovoltaic power generation facility 1 and its equipment.

[0017] The characteristic arrangement of the protective tubes 10A, 10B, and 10C with wiring fixing functions shown in FIG. 1 is as follows. Protective tube 10A is buried underground 100 from one end to the other, extending horizontally. Protective tube 10B has one end buried underground 100 and extends horizontally up to the middle of its length, but then changes direction to a nearly vertical direction and continues to the other end. The other end of protective tube 10B, which in the example of FIG. 1 is the end closest to solar panel 2, is located above ground level and close to the electrical connection between wiring 4 and solar panel 2. Protective tube 10C has one tip surface located flush or nearly flush with the wall surface of handhole portion 6B.

[0018] Figures 2 and 3 depict the protective tube 10 with a wiring fixing function, more specifically, the protective tube 10A with a wiring fixing function shown in Figure 1. The cross-sectional view of Figure 3 shows the protective tube 10 with a wiring fixing function (10A) cut radially along the cutting line III-III shown in Figure 2. The configurations of the protective tubes 10B and 10C with a wiring fixing function are essentially the same as the configurations shown in Figures 2 and 3, so cross-sectional views of the protective tubes 10B and 10C are omitted.

[0019] In this embodiment, a hardened material 12 is filled in a hardened state in a section of the internal conduit of the protective tube 5, through which the wiring 4 is inserted over its entire length, and this section filled with the hardened material 12 corresponds to the protective tube 10 with a wiring fixing function. The hardened material 12 firmly surrounds and fixes the wiring 4 within the conduit of the protective tube 5. Therefore, the wiring 4 inserted inside the protective tube 10 with a wiring fixing function is fixed to the protective tube 10 via the hardened material 12, and even if the wiring 4 is cut outside the protective tube 10 and pulled, it cannot be pulled out.

[0020] In this embodiment, cement-based materials such as concrete, mortar, and cement paste can be used as the hardening material 12. Concrete is particularly one of the materials suitable for the hardening material 12. However, other materials can also be used for the hardening material 12; for example, resin materials, urethane foam, gypsum, glass, or metal can also be used as the hardening material 12. Any material can be used as the hardening material 12 as long as it can be injected and filled in a fluid state into the protective tube 5 through which the wires are inserted when producing the protective tube 10 with a wire fixing function, and can harden while surrounding the wires 4 within the protective tube 5 due to a hardening reaction that occurs after filling. The function of fixing the wiring 4 according to the present invention, in other words, the function of preventing it from being pulled out, is obtained by the fact that the hardening material 12 is filled in the protective tube 10 in a hardened state.

[0021] As shown in FIG. 2, the protective tube 10 with wiring fixing function according to this embodiment is provided at both ends of the section that forms it with end caps 14 made of a low-permeability material that has excellent low permeability to the hardening material 12 when in a fluid state before hardening. A suitable example of a low-permeability material for forming the end caps 14 is a clay-based material that has low permeability to the hardening material 12 and excellent plasticity. A clay-based material can be fixed to positions within the protective tube 5 corresponding to both ends of the protective tube with wiring fixing function 10 to be formed so as to completely block the conduit within the protective tube 5, regardless of the extension state of the protective tube 5 or the insertion state of the wiring 4 inside the conduit, making it easy to form the end caps 14. Furthermore, if a clay-based material is used as the material for forming the end caps 14, when the hardening material 12, such as a cement-based material, is injected into the protective tube 5, the hardening material 12 before hardening is less likely to leak out to the outside of both ends of the protective tube with wiring fixing function 10.

[0022] However, the low-permeability material used as the raw material for end cap 14 is not limited to a clay-based material. Any substance or material may be used as the low-permeability material as long as it is a material that does not allow permeation until hardening material 12 has hardened, in relation to the material selected for hardening material 12 to be poured into the interior of the protective tube. For example, a material such as metal or synthetic resin may be formed in advance into a lid shape that matches the dimensions of the internal conduit of protective tube 5, and this lid may be placed inside protective tube 5 to close the conduit.

[0023] The low-permeability material for the end cap 14 that prevents leakage of the curable material 12 before hardening is not limited to materials with high rigidity such as metal or synthetic resin, but may also be a material with low rigidity such as film. In other words, any material may be used as the low-permeability material as long as it can keep the curable material 12 injected into the protective tube 5 within a predetermined area without leaking until it hardens.

[0024] Depending on the embodiment of the protective tube 10 with a wiring fixing function according to the present invention, there may be cases where the end caps 14 are not left at the ends thereof. There are various reasons for this, but examples include cases where the end caps 14 were not used from the beginning when forming the protective tube 10 with a wiring fixing function, or cases where the end caps 14 were initially placed inside the protective tube to prevent the uncured hardening material 12 injected into the tube from leaking, but were then removed after the hardening material 12 had hardened inside the tube.

[0025] A material that is the same as or substantially similar to the hardening material 12 may be used as the low-permeability material for the end caps 14. In this case, when the protective tube with wiring fixing function 10 is cut along the longitudinal axis after the hardening material 12 has hardened, the cross section will appear as if the hardening material 12 is filled over the entire length.

[0026] Next, a method for forming an embodiment of the protective pipe 10 with a wiring fixing function according to the present invention will be described. When providing the protective pipe 10 with a wiring fixing function in the photovoltaic power generation facility 1, there are two possible cases: one is to form the protective pipe 10 with a wiring fixing function by processing a part of the protective pipe 5 provided in an existing facility (particularly the photovoltaic power generation facility 1), and the other is to bury the protective pipe 10 with the wiring fixing function from the beginning in the ground 100 during the process of constructing a new facility 1 itself. The method for forming the protective pipe 10 with a wiring fixing function will be described in detail below.

[0027] <Processing the protective pipes of existing facilities> First, a case where a protective tube 10 with a wiring fixing function is formed by processing a portion of a protective tube 5 provided in an existing photovoltaic power generation facility 1 will be described with reference to Figures 4 and 5. Here, a case where an embodiment such as the protective tube 10A with a wiring fixing function shown in Figure 1 is formed will be described as an example. Note that in each of Figures 4 and 5, the internal state of the protective tubes 5, 10, which is essentially invisible when viewed from the outside, is shown by dashed lines. That is, in these drawings, the inner wall of the protective tube and the components (wiring 4, end cap 14, hardening material 12) arranged within the conduit defined by the inner wall are shown by dashed lines.

[0028] The protective pipe 5, which is part of an existing facility, is mostly already buried underground 100 (see FIG. 4(A)). First, as necessary, the soil near the intended ends of the protective pipe 10A with wiring fixing function is excavated to expose the unprocessed protective pipe 5. Next, the exposed portion of the protective pipe 5 is processed, such as by incising, drilling, or cutting, without cutting the wiring 4. FIG. 4(B) shows an example in which the protective pipe 5 is completely cut. This processing is performed to secure an entrance for an end cap 14, such as a clay-like material, that blocks the conduit extending inside the protective pipe 5. Therefore, as long as an entrance for the end cap 14 can be secured, it is not necessary to completely cut the protective pipe 5; in other words, partial cutting is sufficient. Any processing can be performed on the protective pipe 5 as long as a passage for guiding the end cap 14 from the outside of the protective pipe 5 into the conduit can be secured. For example, processing can be performed by cutting or drilling a portion of the protective pipe 5.

[0029] 4, the portion of the protective tube 5 where the protective tube 10A with a wiring fixing function will be formed through a subsequent process is separated from other portions of the protective tube 5. Hereinafter, in the present application, the portion of the protective tube 5 where the protective tube 10A with a wiring fixing function will be formed will be described using the reference symbol 10a.

[0030] Next, a low-permeability material that can become the end caps 14 is used to seal both ends of the conduit that penetrates the inside of the protective tube 10a, as shown in Figure 4(C). The low-permeability material that can become the end caps 14 is inserted into the conduit from the cut part of the protective tube. In this case, it is particularly preferable to use a clay-based material as the low-permeability material that can become the end caps 14, because it can seal both ends of the conduit without any gaps, regardless of conditions such as the dimensions and arrangement of the internal conduit of the protective tube 10a and the dimensions and insertion state of each wire 4 that passes through the protective tube 10a.

[0031] However, it is also possible to prepare a part in the shape of the end cap 14 in advance and arrange it so as to close the end of the protective tube 10a. Below, several configuration examples of the end cap 14 will be described with reference to Figures 6 and 7.

[0032] The example configuration of end cap 14 shown in Figure 6 is a disk-shaped, more specifically annular, cap made of a rubber-based material, with a shape and dimensions that allow it to be inserted into the conduit of protective tube 10a. A central hole 22 is provided in the center of end cap 14 made of rubber-based material, so that wire 4 passing through the conduit of protective tube 10a can be retained within the range of the hole wall of center hole 22, which defines the spatial region of center hole 22. Furthermore, end cap 14 made of rubber-based material has a slit extending from the outer periphery of the disk to center hole 22, which forms a passage 24 that allows wire 4 to pass through and lead into center hole 22. By using a material with a low elastic modulus and a high elastic limit, such as a rubber-based material, as the raw material for end cap 14, that is, a material that is easily deformed and easily returns to its original shape, it becomes possible to form center hole 22 of end cap 14 with a diameter smaller than the diameter of multiple wires 4 when they are closely packed together into a single aggregate, and it becomes possible to form passage 24 with a width narrower than the diameter of a single wire 4 or the aggregate. If end cap 14 is easily deformed, passage 24 can be temporarily widened to introduce wire 4 into center hole 22, and if end cap 14 is easily returned to its original shape, the return of end cap 14 will tighten wire 4 fed into center hole 22, strengthening the force that secures wire 4.

[0033] The end cover 14 shown in FIG. 7 is a circular (annular) plate made of a highly rigid material such as metal. In the case of the end cover 14 shown in FIG. 7, the passage 24 extending from the outer periphery of the annular plate to the central hole 22 can be either open or closed. The end cover 14 of this example is configured with a door plate 26 that can be opened or closed. As shown in FIG. 7, when the door plate 26 is open, a passage 24 is formed that guides the wires 4 to the central hole 22. On the other hand, as shown by the dashed line in FIG. 7, when the door plate 26 is closed, the end cover 14 has a continuous annular shape, preventing the wires 4 once introduced into the central hole 22 from escaping through the passage 24. It is preferable to attach an opening / closing mechanism, such as a hinge 28, to the end cover body so that the door plate 26 can be freely opened and closed. Furthermore, it is preferable to provide fasteners on the main body of the end cover 14 and the door plate 26 to fasten them together so as to maintain the shape of the annular plate, i.e., the closed state. This is a particularly effective configuration example when the dimensions of the entire assembly of wires 4 passing through the protective tube 5 are known.

[0034] Alternatively, a sheet-like body made of a low-permeability material such as polyethylene or vinyl chloride resin may be used to cover the end of the protective tube 10a, leaving the extended portion of the wiring 4. In this case, the sheet-like body functions as the end cover 14.

[0035] Returning to the explanation of the process for forming the protective tube 10A, as shown in FIG. 5(A), an injection port 32 is formed in a portion of the protective tube 10a to allow the pre-hardening curing material 12 to be poured into the channel of the protective tube 10a. In the illustrated example, the injection port 32 is formed by cutting out a portion 10f of the front wall near the end of the protective tube 10a. However, the method for forming the injection port 32 is not limited to this example. For example, in the process shown in FIG. 4(C), a process for sealing both ends of the channel of the protective tube 10a with a low-permeability material 14 made of a clay-like material was described. However, it is also possible to seal both ends while leaving portions that can become injection ports 32, rather than completely sealing them.

[0036] It should be noted that the formation of the injection port 32 does not necessarily have to be performed after securing the inlet for the end cap 14 and disposing the end cap 14. For example, the injection port 32 may be formed before securing the inlet for the end cap 14, or at the same time as securing the inlet for the end cap 14 or disposing the end cap 14.

[0037] 5(B), the curable material 12 before curing is injected into the conduit of the protective tube 10a through the injection port 32. At this time, it is preferable to use injection means 34 such as a pipe or a gutter for pouring the curable material 12 before curing into the conduit of the protective tube 10a, as this makes it easier to inject the curable material 12 into the conduit of the protective tube 10a through the injection port 32.

[0038] After a certain amount of time has passed since the injection of the pre-hardening curable material 12 shown in FIG. 5(B), the curable material 12 injected into the protective tube 10a hardens, forming one embodiment of the protective tube 10A with a wiring fixing function according to the present invention. It is preferable for the person who forms the protective tube 10A with a wiring fixing function to restore the protective tube 10A to its original state as much as possible during or after the hardening of the curable material 12. For example, as shown in FIG. 5(C), it is preferable to return the surface wall portion 10f, which was once cut from the protective tube 10a, to its original position and adhere it to the remaining surface wall portion to close the injection port 32. Furthermore, if the protective tube 5 is completely or substantially completely cut to install the end cap 14 within the protective tube 10a, it is preferable to join the cut end of the protective tube 10A with the corresponding cut end of the protective tube 5 to prevent any exposed portions of the wiring 4 from being exposed underground. The protective tube ends may be joined mechanically using a joining tool or chemically, such as by using an adhesive. Furthermore, it is preferable that the ground that has been dug up to form the protective pipe 10A with wiring fixing function be leveled back to its original state so that the protective pipe that was originally buried in the ground 100 is not visible from above ground. Note that the end caps 14 may be removed after the hardening material 12 has hardened, and then collected before the protective pipes 5, 10 are buried again in the ground.

[0039] 1 has been explained, the basic formation process is the same as that of the protective tube 10A when forming the protective tubes 10B and 10C. However, depending on the arrangement state of the protective tube 10 with a wiring fixing function, some of the above-mentioned steps can be omitted.

[0040] For example, in the case of protective tube 10B with a wiring fixing function, processing of protective tube 5 to secure an inlet for low-permeability material 14 is not necessarily required. The end of protective tube 10B closest to solar panel 2 utilizes an initial position extending approximately vertically from that end. In the initial position of solar power generation facility 1, protective tube 5 surrounds wiring 4 from a position slightly away from the electrical joint between solar panel 2 and wiring 4, extends vertically downward, and reaches underground 100. In this initial position, uncured curable material 12 is injected into the conduit of protective tube 5 from the end of protective tube 5 exposed above ground. Once a predetermined amount of curable material 12 has been injected, but not until it overflows from protective tube 5, the injection is stopped and the curable material 12 is allowed to harden. By performing such processing, protective tube 10B with a wiring fixing function can be formed without requiring a process related to end cap 14.

[0041] In addition, in the case of the protective pipe 10C with wiring fixing function, a worker can enter the handhole portion 6B and install the end cap 14 inside the conduit of the protective pipe 5 extending from the wall surface of the handhole portion 6B toward the underground 100, thereby eliminating the need to perform operations such as cutting, incising, or drilling on the protective pipe 5 to secure the entrance for the end cap 14.

[0042] <Protective pipes with wiring fixing functions have been installed since the facility was first established> The following also describes a case where a protective pipe to be buried underground is initially equipped with a wiring fixing function when constructing a new solar power generation facility 1. In this case, the basic construction process for the solar power generation facility 1 is almost the same as a general construction process, but some steps are unique steps required to form the protective pipe with a wiring fixing function according to the present invention.

[0043] For example, an injection port 32 for pouring the pre-hardened hardening material 12 can be provided in advance in the protective pipe 10a before it is buried in the ground 100. The injection port 32 may be created by cutting out, drilling, or the like in the surface wall of the existing protective pipe, or the injection port 32 may be provided from the beginning of manufacturing the protective pipe 10a. When the injection port 32 is provided in advance in the protective pipe 10a before it is buried in the ground 100, it is preferable to also prepare in advance a surface wall portion 10f corresponding to a lid for the injection port 32.

[0044] For the end cap 14, it is preferable to prepare a clay-based material that can function as a cap to prevent leakage of the unhardened hardened material 12 by disposing it inside the protective tube 10a, or to obtain a cap such as that shown in Figures 6 and 7 in advance. Alternatively, instead of preparing the end cap 14 or a material that can become the end cap 14, at least one of the multiple partial protective tubes that will become part of the protective tube 5 used to protect the wiring 4 connecting the constituent equipment (2, 3) of the solar power generation facility 1 after being buried underground 100 may be shaped to be suitable for forming the protective tube 10 with a wiring fixing function. Figure 8 shows an example of the shape of the partial protective tube 10a suitable for forming the protective tube 10 with a wiring fixing function. In this example, the partial protective tube 10a has end walls 10w surrounding an opening 10h in the radial cross section at both ends of the long tube, leaving only an opening 10h large enough to pass the bundle of wiring 4 used in the equipment 1. By adopting such a configuration, after the wires 4 have been inserted through the openings at both ends of the protective tube 10a, there is no need to close the conduit inside the protective tube with the end caps 14. In other words, it is possible to omit part of the process of forming the protective tube 10 with a wire fixing function, and it is possible to more easily prevent the wires 4 from being pulled out.

[0045] Although the present invention has been described above with reference to the drawings, the present invention is not limited to the above-described embodiments. It is apparent to those skilled in the art that various modifications and substitutions of components are possible without departing from the scope and spirit of the appended claims, or that equivalents to the above-described embodiments may be constructed. [Explanation of symbols]

[0046] 1. Solar power generation facility 4 Wiring 5 Protection tube 10 (10A, 10B, 10C) Protective tube with wiring fixing function 10a Protective tube with wiring fixing function (forming) 10f Protection tube surface wall part 10h Protection tube opening 10w protection tube end wall 12 Curing material 14 End lid 32 Inlet

Claims

1. A protective tube having a conduit and protecting wiring passing through the conduit, Wiring connecting equipment within the facility is formed in at least a portion of the protective pipe inserted into the conduit, A hardening material is filled into the conduit within the section and hardened while surrounding the wiring, and the wiring is fixed to the protective tube within the section via the hardening material, thereby providing the protective tube with an installation and fixing function. A protective tube with a wiring fixing function, characterized in that at least one of the ends of the forming section of the protective tube with a wiring fixing function has a wall formed by reducing the diameter of the protective tube to block the conduit through which the wiring is inserted.

2. 2. The protective pipe with a wiring fixing function according to claim 1, wherein the hardening material is a cement-based material.

3. a step of forming a protective tube having a conduit and protecting a wiring passing through the conduit by narrowing the diameter of the protective tube at at least one point of the conduit so that the conduit of the protective tube is blocked when the wiring is passing through the conduit, and providing a wall within the conduit; a step of injecting a pre-hardened hardening material into the interior of the conduit, the at least one point of which is blocked by the wall, while wiring connecting equipment within a facility is being inserted through the conduit of the protective conduit.

4. a step of forming a portion corresponding to a lid that closes the conduit of the protective pipe at at least one point using a clay-based material that is impermeable to the hardening material before hardening, or forming a lid that closes the conduit of the protective pipe at at least one point using a metal or rubber-based material that is impermeable to the hardening material before hardening; a step of injecting the pre-hardened hardening material into the inside of the conduit, the at least one point of which is blocked by the lid or a portion equivalent to the lid, while wiring connecting equipment within a facility is being inserted through the conduit of the protective conduit, the method further comprising: a step of at least partially cutting a protective pipe through which the wiring is inserted and which is buried underground; A step of inserting the clay material or the metal or rubber-based material lid into the conduit from the cut portion of the protective tube and disposing the clay material or the metal or rubber-based material lid so as to block the conduit; and providing an injection port for pouring the pre-hardening hardening material into the protective pipe.

5. 5. The method for forming a protective pipe according to claim 3, wherein the hardening material is a cement-based material.

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