Retractable pole protection equipment

Abstract

To provide a lead-in pole protector for preventing theft of electric wires exposed around a lead-in pole. [Solution] The present invention relates to a pole protector 10 that is installed in a solar power plant and protects the periphery of a pole P to which an electric wire C and an electric wire connection device E are fixed. The main body 1 is made of a cylindrical steel wire mesh that covers the periphery of the pole P from the lower end of the pole P to above the electric wire connection device E.

Description

[Technical field]

[0001] The present invention relates to a retractable pole guard. [Background technology]

[0002] In Japan, the number of solar power plants has rapidly increased since around 2009. This is largely due to the government's launch of the Feed-in Tariff (FIT) system for electricity.

[0003] In the construction of solar power plants, burying the power cables for the solar panels over long distances is very costly. Therefore, to avoid the costly burial work, a construction method is often used in which the power cables are run through protective pipes lined up directly on the ground. This is known as "rolling". There are currently many such outdoor solar power plants. At that time, the price of copper wire was still low, and it was not expected that copper wire theft would become as frequent as it is today.

[0004] On the other hand, since around 2022, the price of copper wire has skyrocketed due to the effects of the Ukraine war and the rapid depreciation of the yen. Stolen copper wires are purchased at very high prices, so copper wire thieves have been spotted at various facilities. In particular, solar power plants, which use thick cables over long distances, are the best hunting grounds for copper wire thieves. Most solar power plants are often installed in remote rural areas or mountain valleys, making them the perfect target for copper wire thieves. In recent years, the number of copper wire thefts at solar power plants has been increasing sharply.

[0005] As mentioned above, outdoor solar power plants are often located in rural areas, where cable thieves can easily enter the facilities without being seen. Furthermore, in the case of rolled wiring, it is possible to cut the thick power cable anywhere and take it away. This makes it difficult for thieves to target the facilities.

[0006] Once a damage occurs, not only is the wiring itself damaged, but the theft of electric wires has recently become so common that it has become common for it to take several months to arrange for restoration of the wiring. The amount of power generation loss during this time is enormous, easily exceeding 10 million yen. Many solar power plants have theft insurance and are still somehow able to receive compensation for the damage, but the insurance companies have suffered so much loss that theft insurance has recently been suspended and it is no longer possible to obtain it. However, it is no longer possible to bury the current rolled wiring, and solar power plant owners live every day in fear of theft of electric wires.

[0007] Therefore, the applicant of the present application proposed a wire theft prevention device to prevent the theft of the rolled wiring, and obtained a patent (Patent Document 1). However, even if the theft of the rolled wiring is prevented, there is still a risk that the exposed electric wires around the lead-in pole may be stolen. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Patent No. 7575650 Summary of the Invention [Problem to be solved by the invention]

[0009] The present invention aims to improve the disadvantages of the conventional example and, in particular, to provide a pole protector that prevents the theft of exposed electric wires around the pole. [Means for solving the problem]

[0010] The present invention relates to a pole protector that is installed in a solar power plant and protects the periphery of a pole to which electric wires and electric wire connection devices are fixed. The main body is made of a cylindrical steel wire mesh that covers the periphery of the pole from the bottom end of the pole to above the electric wire connection devices.

[0011] The steel body is relatively heavy and cannot be quickly removed, and the steel body is relatively hard and cannot be quickly cut. Effect of the Invention

[0012] Therefore, according to the present invention, it is possible to provide a pole protector that prevents theft of exposed electric wires around the pole. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a diagram showing an embodiment of the present invention. [Diagram 2] FIG. 2 is a flow chart showing a construction procedure of the embodiment shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a configuration diagram showing an embodiment of a retractable pole protector according to the present invention.

[0015] The lead-in pole protector 10 shown in Fig. 1 is installed in a low-voltage (less than 50 kW) solar power plant, and protects the periphery of a lead-in pole P to which an electric wire C and an electric wire connection device E are fixed. The main body 1 of the lead-in pole protector 10 is made of a steel wire mesh that covers the periphery of the lead-in pole P from the lower end of the lead-in pole P to above the electric wire connection device E. The cross section of the main body 1 is cylindrical.

[0016] In this embodiment, a metal top plate 2 is provided at the upper end of the main body 1 to close the upper end of the main body 1. The top plate 2 is provided with a through hole 3 through which the lead-in column P passes.

[0017] In addition, between the main body 1 and the pull-in pole P, a fastener 4 that connects the main body 1 and the pull-in pole P is provided.

[0018] To elaborate further, in this embodiment, the height of the main body 1 is about 3 m. The mesh size of the main body 1 is set so that a person who wants to steal the electric wire cannot insert his / her hand or tool into the wire mesh. In addition, the weight of the main body 1 and the thickness of the wire mesh are taken into consideration so as not to allow the main body 1 to be lifted to access the inside or to be cut with a tool to access the inside. The weight of the main body 1 is 130 kg in this embodiment, but if it is set to 80 kg or more and 150 kg or less, a good balance between the anti-theft effect and the cost is obtained. In addition, the thickness of the wire mesh of the main body 1 is 4.5 mm in this embodiment, but if it is set to 2.0 mm or more and 5.0 mm or less, this also has a good balance between the anti-theft effect and the cost. Here, the values ​​of the weight and thickness can be selected from any value within the above-mentioned range.

[0019] Thus, the main body 1 is heavy, but for ease of construction, it is divided into a first wire mesh 11 and a second wire mesh 12 at the top and bottom before construction. The first wire mesh 11 is constructed first so as to cover the periphery of the pull-in pole P. The second wire mesh 12 is constructed later so as to cover the periphery of the pull-in pole. This construction procedure will be described later, but the first wire mesh 11 has a welded portion W at its lower end, and the second wire mesh 12 has a welded portion W at its upper end. Then, the welded portions W are brought into contact with each other and welded to form a single main body 1.

[0020] Before construction, the first wire mesh 11 and the second wire mesh 12 each have vertical slits 11a, 12a. Before construction, the first wire mesh 11 and the second wire mesh 12 are incomplete cylinders with the vertical slits 11a, 12a cut off. After these are installed to cover the periphery of the pull-in column P, the vertical slits 11a, 12a are welded to fix the first wire mesh 11 and the second wire mesh 12 into a complete cylindrical shape.

[0021] The main body 1 and the pull-in column P are connected by a fixture 4 on the inside of the upper end of the main body 1. In this embodiment, the fixture 4 is an L-shaped steel frame, with both ends of the L shape welded to the inner wall of the main body 1 and the apex of the L shape welded to the pull-in column P. The weight of this fixture 4 is added to the weight of the main body 1, making it even more difficult to lift the main body 1 and access the inside.

[0022] The top plate 2 is formed in a disk shape with a diameter that matches the cylinder of the main body 1. The top plate 2 has a through hole 3 in the center through which the lead-in pole P penetrates. In this embodiment, the through hole 3 is square. The top plate 2 is divided into two parts before construction. At this time, the through hole 3 is a recess formed in the part. At the top of the main body 1, the parts of the top plate 2 are arranged so that the through hole 3 is applied to the lead-in pole P, and the two parts are welded at the welded part 3a, so that the top plate 2 is formed in a disk shape and the lead-in pole 3 penetrates the through hole 3. The circumference of the top plate 2 is welded to the upper end of the main body 1. This blocks the top of the main body 1, making it difficult for a thief to access the inside from the top of the main body 1. Here, the main body 1 and the top plate 2 are cut before construction in order to leave the existing lead-in pole and electric wire C as they are and install the lead-in pole protector 10 around them.

[0023] An electric wire C and an electric wire connection device E are already installed on the lead-in pole P covered by the main body 1. The upper electric wire C is led into the lead-in pole P from the power company system. Meanwhile, the lower electric wire C is connected to the solar power generation system (power conditioner, etc.) on the premises. The electric wire connection device E is a CT (current transformer), a meter box, etc.

[0024] FIG. 2 is a flow chart showing the installation procedure of the retractable pole protector 10 in this embodiment.

[0025] First, the first wire mesh 11 (upper tube) of the main body 1 is placed around the lead-in pole P via the vertical slits 11a near the ground. Then, the vertical slits 11a are welded to form a complete tube (S1). At this time, heavy machinery may be used to move the first wire mesh 11.

[0026] Next, the upper tube 11 is lifted upward by heavy machinery (S2). This creates a space below the upper tube 11 for inserting the second wire mesh 12 (lower tube).

[0027] Next, the second wire mesh 12 (lower tube) of the main body 1 is placed around the pull-in pole P via the vertical slits 12a near the ground. The vertical slits 12a are then welded to form a complete tube (S3). At this time, the second wire mesh 12 may be placed near the pull-in pole P in advance and then manually placed around the pull-in pole P.

[0028] Next, the upper cylinder 11 that was lifted up is lowered so that it contacts the top of the lower cylinder 12, and the circumference where the upper cylinder 11 and the lower cylinder 12 contact is welded. In this way, the upper cylinder 11 and the lower cylinder 12 are connected (S4).

[0029] Thereafter, the fastener 4 is welded to the inner wall of the upper tube 11 and the pull-in column P at the inner upper end of the upper tube 11. In this way, the upper tube and the pull-in column P are connected (S5).

[0030] Next, the two divided parts of the top plate 2 are arranged above the upper tube 11 so that the pull-in columns fit into the through holes 3. Then, the two divided parts of the top plate 2 are welded together to form a single top plate 2 (S6).

[0031] Finally, the circumference of the top plate 2 is welded to the top end of the upper tube 11, and the top plate 2 is fixed to the main body 1. This completes the installation of the retractable pole protector 10.

[0032] According to the embodiment described above, a strong wire mesh cut from 4.5 mm thick steel is bent into a cylindrical shape, and the lead-in pole P is covered on-site with the joints welded to prevent access from the outside. This prevents thieves from approaching the exposed electric wires, and prevents the cutting and theft of the electric wires C fixed to the lead-in pole P. Because the main body 1 is made of wire mesh, it can withstand wind pressure even in strong winds such as a typhoon, and there is little risk of it falling over. In addition, because the main body 1 is made of wire mesh, there is no problem with the visibility of the meter inside.

[0033] In addition, the weight of the main body 1 and the fixing device 4, and the connection between the main body 1 and the lead-in pole P by the fixing device 4, make the weight and structure of the wire mesh difficult to lift. The top is also sealed off by welding the top plate 2. This means that thieves cannot climb a stepladder or insert wire cutters or the like from above, and the lead-in pole cannot be accessed from above, the side, or below. Furthermore, unlike intrusion alerts using cameras or sensors, no running costs for electricity, communications, etc. are required, and no notifications are received at night, significantly reducing the psychological burden.

[0034] In addition, the present invention is not limited to the above-described embodiment, and it goes without saying that various other applications and modifications are possible without departing from the gist of the present invention as described in the scope of the utility model registration claims. For example, the above-mentioned embodiment has been described in detail and specifically in order to clearly explain the present invention, and is not necessarily limited to having all of the described configurations. In addition, it is also possible to add, delete, or replace part of the configuration of the present embodiment with other configurations.

[0035] In the above embodiment, an example in which the main body 1 is divided into two, an upper tube 11 and a lower tube 12, has been shown. However, this is not limited to the above, and the main body 1 may be divided into more tubes. For example, the main body 1 may be divided into three tubes, one above the other. In this case, the construction procedure for the upper tube 11 and the lower tube 12 is the same as that described above. In addition, the entire main body 1 in which the upper tube 11 and the lower tube 12 are connected may be replaced with the upper tube 11, and the lower tube 12 may be further constructed below it in the same manner as in the construction procedure described above. In this way, the weight of each tube before connection can be further reduced compared to the case in which the tubes are divided into two. [Explanation of symbols]

[0036] 1...Main body, 2...Top plate, 3...Through hole, 3a...Welded part of top plate, 4...Fixing device, 10...Pulling-in pole protector, 11...First wire mesh (upper tube), 11a...Vertical cut in first wire mesh, 12...Second wire mesh (lower tube), 12a...Vertical cut in second wire mesh, C...Electric wire, E...Electric wire connection device, P...Pulling-in pole, W...Welded part

Claims

1. A pole protector that is installed in a solar power plant and protects the periphery of a pole to which an electric wire and an electric wire connection device are fixed, A pole protector having a main body made of steel wire mesh that covers the periphery of the pole from the bottom end of the pole to above the electric wire connection device.

2. The retractable pole protector according to claim 1 , comprising a metal top plate closing an upper end of the main body, and a through hole for the retractable pole provided in the top plate.

3. The lead-in pole guard of claim 1 , further comprising a fastener connecting the body and the lead-in pole.

4. The retractable pole protector according to claim 1, wherein the weight of the main body is between 80 kg and 150 kg.

5. The pole protector according to claim 1, wherein the thickness of the wire mesh of the main body is 2.0 mm or more and 5.0 mm or less.

6. The main body is divided into a plurality of wire mesh tubes at the top and bottom, and the upper tube is constructed prior to the lower tube so as to cover the periphery of the lead-in pole, The lower tube is constructed after the upper tube so as to cover the periphery of the pull-in column, The retractable pole protector according to claim 1, wherein the upper tube has a welded portion at its lower end and the lower tube has a welded portion at its upper end, and the welded portions are in contact and welded to form the single main body.

Images