Wiring fixing function protective tube and method for forming the same

Abstract

This invention provides a protective tube with a wiring fixing function to prevent wiring from being pulled out, and a method for forming the same. [Solution] A protective conduit (10A) with a wiring fixing function is provided, in which wiring (4) connecting equipment within a facility is formed in at least a portion of the section of a protective conduit (5) through which the conduit is inserted, and a hardening material (12) is filled and hardened in the conduit within the section so as to surround the wiring, and the wiring (4) is fixed to the protective conduit within the section via the hardening material (12). Such a protective conduit (10A) is formed by a method that includes the steps of forming a lid (14) or a portion equivalent thereto that closes the conduit of the protective conduit at at least one point using a low-permeability material that does not allow the hardening material before hardening to pass through, and injecting the hardening material before hardening into the conduit where at least one point is closed by the lid (14) or a portion equivalent thereto, while the wiring (4) is inserted through the conduit of the protective conduit.

Description

Technical Field

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

Background Art

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

[0003] As an example of a protective pipe that has wiring inserted therein and is buried in the ground as described above, the technology disclosed in Patent Document 1 below is known. In such a solar power generation facility, with the recent soaring price of copper, thefts of wiring having conductive wires made of copper have occurred frequently. Suffering damage from wiring theft not only results in loss of the wiring itself, but also requires a large amount of cost for facility repair. Furthermore, even if not suffering theft damage, the administrator of the solar power generation facility has to make facility investments for theft prevention such as installing surveillance cameras. Thus, the problem has arisen that the administrator of the solar power generation facility is directly and indirectly suffering a large amount of economic damage.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Incidentally, wiring theft can occur by cutting the wiring at the point where it is led to the ground and connected to a solar panel or current collection box, and at the handhole (manhole) located in the middle of the protective conduit for inspection, and then pulling the wiring out on the ground. However, the technology disclosed in Patent Document 1 does not have a configuration to prevent the wiring from being pulled out.

[0006] Therefore, there was a need for a means to prevent the theft of wiring by delaying the theft process and causing those attempting to steal the wiring to abandon their plans, thereby ultimately preventing the theft of wiring. In view of these problems, the present invention aims to provide a protective tube with a wiring fixing function to prevent wiring from being pulled out, and a method for forming the same. [Means for solving the problem]

[0007] To solve the above-mentioned problems, the present invention provides a protective conduit having a conduit and protecting wiring inserted through the conduit, wherein wiring connecting equipment within a facility is formed in at least a portion of the section of the protective conduit through which the wiring is inserted, and the conduit in the section is filled and hardened with a hardening material that surrounds the wiring, and the wiring is fixed to the protective conduit in the section via the hardening material, thereby providing a protective conduit with a wiring fixing function.

[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 equivalent portion that seals the conduit of the protective tube at at least one point using a low-permeability material that does not allow the cured material to pass through before curing; and injecting the cured material before curing into the conduit where at least one point is sealed by the lid or equivalent portion, while the wiring is being inserted through the conduit of the protective tube. [Effects of the Invention]

[0009] According to the present invention, the theft of wiring is delayed, and theft of wiring is prevented. [Brief explanation of the drawing]

[0010] [Figure 1] This is a schematic diagram showing a solar power generation facility as an example of a facility that employs several embodiments of the protective tube with wiring fixing function according to the present invention. [Figure 2] This figure shows a cross-section of one embodiment of a protective tube with wiring fixing function according to the present invention, when cut along its longitudinal axis. [Figure 3] This figure shows a cross-section of the embodiment of the protective tube with wiring fixing function shown in Figure 2, when cut along the radial direction. [Figure 4] This figure schematically illustrates a method for forming one embodiment of a protective tube with a wiring fixing function according to the present invention. [Figure 5] Following Figure 4, this figure schematically shows a method for forming one embodiment of a protective tube with a wiring fixing function according to the present invention. [Figure 6] This figure shows an example of an end cap made of a low-permeability material used in the formation process of one embodiment of a protective tube with wiring fixing function according to the present invention. [Figure 7] This figure shows another example of an end cap made of a low-permeability material used in the formation process of one embodiment of a protective tube with wiring fixing function according to the present invention. [Figure 8] This figure shows a cross-section of one embodiment of a partial protective conduit, which is part of a protective conduit buried underground to protect wiring, when cut along its longitudinal axis. [Modes for carrying out the invention]

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

[0012] As an example of a facility in which a protective conduit with wiring fixing function 10 is used, the solar power generation facility 1 is equipped with multiple solar panels 2 and a current collection box 3 that collects electricity generated by the solar panels 2. Conductive wiring 4 connecting the solar panels 2 and the current collection box 3 is inserted into a protective conduit 5 buried in the ground 100 within the facility 1. One end of the protective conduit 5 is led to the surface and one end of the wiring 4 is connected to the solar panels 2, and the other end of the protective conduit 5 is also led to the surface and the other end of the wiring 4 is connected to the current collection box 3.

[0013] Furthermore, a handhole 6 for inspecting the wiring 4 is provided in the middle of the protective conduit 5. In the example facility shown in Figure 1, two handholes, 6A and 6B, are clearly indicated. Reference numerals 6a and 6b indicate the covers of handholes 6A and 6B, respectively. Of course, the number of handholes 6 provided in the solar power generation facility 1 is arbitrary.

[0014] In this application, "wiring" refers to an electric wire or cable. Here, "electric wire" refers to an insulated core wire comprising a conductor and an insulating coating formed on the outer circumference of the conductor, and "cable" refers to a cable comprising at least one insulated core wire consisting of a conductor and an insulating coating formed on the outer circumference of the conductor, and further comprising a sheath formed on the outside of this insulating coating. The above conductors are made of copper, for example. Examples of 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 referred to as a "tubular member." Examples of tubular members include FEP (Flexible Electric Pipe) pipes (also called "corrugated rigid polyethylene pipes"). With this configuration, the protective tube 5 adequately protects the wiring 4 passing through its internal conduit.

[0016] In FIG. 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. Depending on the installation state of the solar power generation facility 1 and its equipment, any number of protective pipes 10 with a wiring fixing function in various embodiments can be installed at any part of the protective pipe 5.

[0017] The characteristic arrangement states of the protective pipes 10A, 10B, and 10C with a wiring fixing function shown in FIG. 1 are as described below. The protective pipe 10A has all parts from one end to the other end buried in the ground 100 and extends horizontally. The protective pipe 10B has one end buried in the ground 100 and extends horizontally until the middle of the longitudinal direction, but the extending direction changes to a substantially vertical direction from the middle of the longitudinal direction and reaches the other end. The other end of the protective pipe 10B, in the example of FIG. 1, the end closer to the solar panel 2, is at a ground height exceeding the ground height near the electrical connection part between the wiring 4 and the solar panel 2. The protective pipe 10C has one end face arranged on the same plane or substantially the same plane as the wall surface of the handhole part 6B.

[0018] In FIGS. 2 and 3, the protective pipe 10 with a wiring fixing function, more specifically, the protective pipe 10A with a wiring fixing function shown in FIG. 1 is depicted. The cross-sectional view of FIG. 3 shows a cross-section of the protective pipe 10 (10A) cut in the radial direction along the cutting line III-III shown in FIG. 2. Since the configurations of the protective pipes 10B and 10C with a wiring fixing function are essentially the same as the configurations shown in FIGS. 2 and 3, the attachment of cross-sectional views showing the protective pipes 10B and 10C is omitted.

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

[0020] In this embodiment, as the curing material 12, cement-based materials such as concrete, mortar, and cement paste can be used. In particular, concrete is one of the suitable materials as the curing material 12. However, it is also possible to use other materials as the curing material 12. For example, resin materials, foamed urethane, gypsum, glass, or metal can also be used as the curing material 12. The curing material 12 can be injected and filled in a fluid state into the protective pipe 5 through which the wiring is inserted when creating the protective pipe 10 with a wiring fixing function, and any material can be applied as the curing material 12 as long as it can be cured while surrounding the wiring 4 in the protective pipe 5 due to a curing reaction after filling. The fixing function of the wiring 4 according to the present invention, in other words, the anti-pulling function, is obtained by filling the protective pipe 10 with the curing material 12 in a cured state.

[0021] As shown in FIG. 2, the protective pipe 10 with a wiring fixing function according to this embodiment is provided with end caps 14 made of a low-permeability material that is excellent in low permeability to the curing material 12 in a fluid state before curing at both ends of the section forming the same. A suitable example of a low-permeability material for forming the end cap 14 is a clayey material that exhibits both low permeability to the hardening material 12 and excellent plasticity. With a clayey material, it is possible to fix the end cap 14 to positions within the protective tube 5 corresponding to both ends of the protective tube 10 with wiring fixing function to be created, regardless of the extension state of the protective tube 5 or the insertion state of the wiring 4 inside the conduit, thus easily forming the end cap 14. Furthermore, if a clayey material is used as the forming material for the end cap 14, when the hardening material 12 such as cement 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 10 with wiring fixing function.

[0022] However, the low-permeability material used as the raw material for the end cap 14 is not limited to clayey materials. Any substance or material can be used as the low-permeability material as long as it is a material that does not allow permeation until the hardening material 12 hardens, in relation to the material selected as the hardening material 12 injected into the inside of the protective tube. For example, a material such as metal or synthetic resin can be pre-formed into the shape of a cap that fits the dimensions of the internal conduit of the protective tube 5, and this cap can be installed inside the protective tube 5 to seal the conduit.

[0023] The low-permeability material for the end cap 14, which prevents leakage of the curing material 12 before it hardens, is not limited to highly rigid materials such as metals or synthetic resins; a less rigid material such as a film may also be used. In other words, any material can be used as the low-permeability material as long as it can keep the curing material 12 injected into the protective tube 5 within a predetermined section without leakage until it hardens.

[0024] In some embodiments of the protective tube 10 with wiring fixing function according to the present invention, an end cap 14 may not be left at its end. There are various reasons for this, but for example, when forming the protective tube 10 with wiring fixing function, an end cap 14 may not be used from the beginning, or an end cap 14 may have been initially placed inside the protective tube to prevent leakage of the uncured hardened material 12 injected into the tube, but the end cap 14 may have been removed after the hardened material 12 had hardened inside the tube.

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

[0026] Next, a method for forming an embodiment of the protective conduit 10 with wiring fixing function according to the present invention will be described. When providing the protective conduit 10 with wiring fixing function to a solar power generation facility 1, there are two possibilities: one is to process a portion of the protective conduit 5 already installed in an existing facility (particularly the solar power generation facility 1) to form the protective conduit 10 with wiring fixing function; the other is to bury a protective conduit 10 with wiring fixing function already installed in the ground 100 during the process of constructing the facility 1 itself from scratch. The method for forming the protective conduit 10 with wiring fixing function will be described in detail below.

[0027] <Processing of protective pipes from existing facilities> First, we will explain the case in which a portion of the protective conduit 5 installed in the existing solar power generation facility 1 is processed to form a protective conduit 10 with a wiring fixing function, referring to Figures 4 and 5. Here, we will describe the case in which an embodiment such as the protective conduit 10A with a wiring fixing function shown in Figure 1 is formed. In Figures 4 and 5, the internal state of the protective conduits 5 and 10, which are not normally visible when viewed from the outside, is represented by dashed lines. That is, in these drawings, the inner wall of the protective conduit and the components (wiring 4, end cap 14, hardening material 12) placed inside the conduit defined by the inner wall are represented by dashed lines.

[0028] The protective conduit 5, as part of the existing facility, is mostly already buried underground 100 (see Figure 4(A)). First, if necessary, the soil near the parts to be used as both ends of the protective conduit 10A with wiring fixing function is excavated to expose the protective conduit 5 before processing. Next, processing treatments such as cutting, perforating, or slicing are performed on the exposed portion of the protective conduit 5 so as not to cut the wiring 4. Figure 4(B) shows an example where the protective conduit 5 is completely cut. This treatment is performed to secure an entrance for the end cap 14, which will be made of clayey material or the like to seal the conduit extending inside the protective conduit 5. Therefore, it is not necessarily required to completely cut the protective conduit 5 as long as an entrance for the end cap 14 can be secured; in other words, partial cutting is sufficient. Any treatment can be performed on the protective conduit 5 as long as a passage can be secured to guide the end cap 14 from outside the protective conduit 5 into the conduit. For example, a part of the protective conduit 5 can be cut or perforated.

[0029] In the embodiment shown in Figure 4, the portion of the protective tube 5 in which the protective tube 10A with wiring fixing function is to be formed through subsequent processes is separated from the other portions of the protective tube 5. Hereafter, the portion of the protective tube 5 in which the protective tube 10A with wiring fixing function is to be formed will be denoted by the reference numeral 10a.

[0030] Next, using a low-permeability material that can serve as an end cap 14, both ends of the conduit penetrating the inside of the protective tube 10a are sealed, as shown in Figure 4(C). The low-permeability material that can serve as an end cap 14 is inserted into the conduit from the cut point of the protective tube. At this time, it is particularly preferable to use a clayey material as the low-permeability material that can serve as an end cap 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 wiring 4 inserted inside the protective tube 10a.

[0031] However, it is also acceptable to pre-fabricate an end cap 14 and install it to cover the end of the protective tube 10a. In the following, several examples of the configuration of the end cap 14 will be described with reference to Figures 6 and 7.

[0032] The end cover 14 shown in Figure 6 is a disc-shaped, more specifically, annular cover made of a rubber-based material, with a shape and dimensions that allow it to be inserted into the conduit of the protective tube 10a. A central hole 22 is provided in the center of the end cover 14 made of rubber-based material, allowing the wiring 4, which is inserted into the conduit of the protective tube 10a, to be kept within the range of the hole wall of the central hole 22 that defines the spatial area of ​​the central hole 22. Furthermore, the end cover 14 made of rubber-based material has a slit extending from the outer circumference of the disc to the central hole 22, and this slit serves as a passage 24 through which the wiring 4 can pass and be guided into the central 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 the end cover 14, it becomes possible to make the diameter of the central hole 22 of the end cover 14 smaller than the diameter when multiple wires 4 are densely packed together into a single assembly, and to make the width of the passage 24 narrower than the diameter of a single wire 4 or assembly. If the end cover 14 is easily deformable, the passage 24 can be temporarily widened to guide the wires 4 into the central hole 22, and if the end cover 14 is easily returned to its original shape, the restoration of the end cover 14 will tighten the wires 4 sent into the central hole 22, thereby strengthening the force that fixes the wires 4.

[0033] Furthermore, the example of the end cover 14 shown in Figure 7 is a disc (ring-shaped plate) cover made of a highly rigid material such as metal. In the case of the end cover 14 in Figure 7, the passage 24 extending from the outer circumference of the ring-shaped plate to the central hole 22 can be in both an open and closed state. In this example of the end cover 14, a part of the ring-shaped plate is made up of a door plate 26 that can be opened and closed. As shown in Figure 7, when the door plate 26 is open, a passage 24 is formed that guides the wiring 4 into the central hole 22. On the other hand, as shown by the dashed line in Figure 7, when the door plate 26 is closed, the end cover 14 becomes a continuous ring shape, and the wiring 4 that has been guided into the central hole 22 will not escape out of the passage 24 again. It is preferable to attach an opening and closing mechanism component with an axis as a pivot point, such as a hinge 28, so that the door plate 26 can be freely opened and closed relative to the body of the end plate. Furthermore, it is preferable to provide the main body portion of the end cover 14 and the door plate 26 with a connector that fastens them together to maintain the shape of the annular plate, i.e., the closed state. This is a particularly effective configuration when the dimensions of the assembly of wiring 4 that passes through the protective tube 5 are known.

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

[0035] Returning to the explanation of the formation process of the protective tube 10A, as shown in Figure 5(A), an injection port 32 is formed in a part of the protective tube 10a for pouring the hardened material 12 before hardening into the pipeline of the protective tube 10a. In the illustrated example, the injection port 32 is formed by cutting out a part 10f of the surface wall near the end of the protective tube 10a. However, the method of forming the injection port 32 is not limited to this example. For example, in the process shown in Figure 4(C), the process of sealing both ends of the pipeline of the protective tube 10a using a low-permeability material 14 made of clayey material was explained, but at this time, instead of completely sealing both ends, it is also possible to seal them while leaving a part that can become the injection port 32.

[0036] Furthermore, the formation of the inlet 32 ​​does not necessarily have to be carried out after securing the entrance for the end cover 14 and installing the end cover 14. For example, the inlet 32 ​​may be formed before securing the entrance for the end cover 14, or at the same time as securing the entrance for the end cover 14 or installing the end cover 14.

[0037] Next, as shown in Figure 5(B), the uncured hardening material 12 is injected into the pipeline of the protective pipe 10a through the injection port 32. At this time, it is preferable to use an injection means 34 such as a pipe or trough to pour the uncured hardening material 12 into the pipeline of the protective pipe 10a, as this makes it easier to inject the hardening material 12 into the pipeline of the protective pipe 10a through the injection port 32.

[0038] As shown in Figure 5(B), after a certain amount of time has elapsed since the injection of the uncured hardening material 12, the hardening material 12 injected into the protective tube 10a hardens, forming one embodiment of the protective tube 10A with wiring fixing function according to the present invention. It is preferable for the builder of the protective tube 10A with wiring fixing function to return the protective tube 10A to its state before it was formed as much as possible during or after the hardening of the hardening material 12. For example, as shown in Figure 5(C), it is preferable to return the surface wall portion 10f that was cut off from the protective tube 10a to its original position and seal the injection port 32 by bonding it to the remaining surface wall portion. Furthermore, if the protective tube 5 is completely or substantially completely cut in order to place the end cap 14 inside the conduit of the protective tube 10a, it is preferable to connect the cut end of the protective tube 10A to the corresponding cut end of the protective tube 5 so that no portion of the wiring 4 is exposed in the ground. The connection between the ends of the protective tubes may be by mechanical connection using a connecting device or by chemical connection using an adhesive. Furthermore, it is preferable to level the ground that has been excavated to form the protective conduit 10A with wiring fixing function so that the protective conduit that was originally buried underground 100 is not visible from the surface. Alternatively, the end cap 14 may be removed after the hardening material 12 has hardened, and the end cap 14 may be retrieved before burying the protective conduits 5 and 10 back into the ground.

[0039] Up to this point, we have described the method for forming the protective conduit 10A with wiring fixing function shown in Figure 1. However, the basic formation process for the protective conduits 10B and 10C is the same as that for the protective conduit 10A. However, depending on the arrangement of the protective conduit 10 with wiring fixing function, some of the above steps can be omitted.

[0040] For example, in the case of a protective conduit 10B with a wiring fixing function, the processing performed on the protective conduit 5 to secure an entrance for the low-transparency material 14 is not always necessary. The end of the protective conduit 10B closest to the solar panel 2 utilizes the initial configuration in which it extends approximately vertically from that end. In the initial configuration of the solar power generation facility 1, the protective conduit 5 surrounds the wiring 4 from a position slightly away from the joint that electrically connects the solar panel 2 and the wiring 4, extends vertically downward, and reaches the ground 100. In this initial configuration, the uncured hardening material 12 is injected into the conduit of the protective conduit 5 from the end of the protective conduit 5 that is exposed above ground, and the injection is stopped once a predetermined amount of hardening material 12 has been injected, as long as the hardening material 12 does not overflow from the protective conduit 5, and then the hardening material 12 is allowed to harden. By performing this processing, it is possible to form the protective conduit 10B with a wiring fixing function without requiring the process related to the end cover 14.

[0041] Furthermore, in the case of the protective conduit 10C with wiring fixing function, by having a worker enter the handhole section 6B and place the end cap 14 inside the conduit of the protective conduit 5 that extends from the wall surface of the handhole section 6B towards the ground 100, it becomes unnecessary to perform operations such as cutting, incising, or drilling into the protective conduit 5 in order to secure the entrance for the end cap 14.

[0042] <Protective conduits with wiring fixing functions were installed from the facility's inception.> This section also describes the case where a protective conduit buried underground is equipped with a wiring fixing function from the outset when constructing a new solar power generation facility 1. In this case as well, the basic construction process of the solar power generation facility 1 is almost the same as the general construction process, but some steps are specific steps necessary to form the protective conduit with the wiring fixing function according to the present invention.

[0043] For example, an injection port 32 for pouring in the hardening material 12 before it hardens can be provided in the protective pipe 10a before it is buried in the ground 100. The injection port 32 can be created by cutting or drilling into the surface wall of an existing protective pipe, or the injection port 32 can be provided from the time the protective pipe 10a is manufactured. If the injection port 32 is created in the protective pipe 10a before it is buried in the ground 100, it is preferable to also prepare the surface wall portion 10f that corresponds to the lid of the injection port 32 in advance.

[0044] Regarding the end cap 14, it is preferable to have a clayey material prepared in advance that can function as a cap to prevent leakage of uncured hardened material 12 when placed inside the protective pipe 10a, or to have a cap body like those shown in Figures 6 and 7 obtained in advance. Alternatively, instead of preparing an end cap 14 or a material that can become an end cap 14, at least one of several partial protective pipes that will become part of the protective pipe 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 a protective pipe with a wiring fixing function 10. An example of the shape of a partial protective pipe 10a suitable for forming a protective pipe with a wiring fixing function 10 is shown in Figure 8. In this example, the partial protective pipe 10a has an end wall 10w around the radial cross-section of both ends of a long pipe, leaving only an opening 10h that is sized to allow a bundle of wiring 4 used in the equipment 1 to be inserted. By adopting this configuration, after the wiring 4 is inserted through the openings at both ends of the protective tube 10a, it becomes unnecessary to seal the conduit inside the protective tube with the end caps 14. In other words, it becomes possible to omit part of the process of forming the protective tube 10 with wiring fixing function, making it easier to prevent the wiring 4 from being pulled out.

[0045] While embodiments of the present invention have been described so far, the present invention is not limited to the embodiments described above with reference to the drawings. It will be 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 configurations essentially equivalent to those of the embodiments described above can be constructed. [Explanation of Symbols]

[0046] 1. Solar power generation facilities 4 Wiring 5 Protection tube 10 (10A, 10B, 10C) Protective tube with wiring fixing function 10a Wiring fixing function protective tube (under construction) 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 conduit having a conduit and protecting wiring inserted through the conduit, Wiring connecting equipment within the facility is formed in at least a portion of the protective conduit through which the conduit is inserted, A protective tube with a wiring fixing function, characterized in that a hardening material is filled and hardened in the conduit within the section, surrounding the wiring, and the wiring is fixed to the protective tube within the section via the hardening material.

2. A protective tube with a wiring fixing function according to claim 1, wherein at least one of the ends of the section of the protective tube with a wiring fixing function is provided with an end cover that closes the conduit.

3. A protective tube with a wiring fixing function according to claim 1 or 2, wherein the hardening material is a cement-based material.

4. A step of forming a lid or equivalent portion that seals the conduit of the protective pipe at at least one point using a low-permeability material that does not allow the cured material to pass through before curing, A method for forming a protective tube with a wiring fixing function, characterized by comprising the step of injecting the uncured hardening material into the conduit, where at least one point is blocked by the lid or a portion equivalent thereto, while the wiring is inserted through the conduit of the protective tube.

5. The forming method according to claim 4, the method further, The steps include: cutting at least partially the protective conduit through which the aforementioned wiring is inserted and buried underground; The process involves inserting the low-permeability material or a lid made of the low-permeability material into the conduit from the cut portion of the protective tube, and positioning the low-permeability material or a lid made of the low-permeability material so as to block the conduit. A forming method comprising the step of providing an inlet for pouring the hardened material before hardening into the pipeline of the protective pipe.

6. A method for forming a protective pipe according to claim 4 or 5, wherein the hardening material is a cement-based material.

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