Live line separation net fixed to a power transmission line support and net middle part fixing body used in said live line separation net

Abstract

To provide a live line separation net and a net intermediate part fixing body which prevent the danger of a worker slipping through separation flags provided at predetermined points on a steel tower and prevent the worker from approaching a live line. [Solution] The live line separation net 3 of the present invention comprises a flexible net body 4 of a desired length, a net one-end side fixing body 5 fixed to the power line support and fixing one end of the net body, a net other-end side fixing body 6 fixed to the power line support and fixing the other end of the net body, and one or more net middle part fixing bodies 7 fixed to the power line support and fixing the middle part of the net body. The net middle part fixing body comprises a middle part rod part 7a having a ring catch fixed to the net body, and a middle part base part 7b fixed to the power line support.

Description

[Technical field]

[0001] The present invention relates to a live line isolation net that is fixed to a power line support that supports a power line on a steel tower, substation equipment, etc., and to a net middle fixing body used in this live line isolation net. [Background technology]

[0002] Conventionally, in construction of transmission lines on a transmission line support structure such as a steel tower, in order to prevent workers from approaching the live line (charging section), for example, as shown in FIG. 5, a number of spacing flags 2 are provided at predetermined intervals above and below on the live line 1a side of the transmission line support structure such as a steel tower 1, and extra-high voltage proximity work monitors are also positioned as an auxiliary measure to ensure safety.

[0003] Note that 1b indicates a stop line.

[0004] For example, Patent Document 1 discloses a device equipped with a separation flag. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Utility Model Application Publication No. 6-29320 Summary of the Invention [Problem to be solved by the invention]

[0006] However, even if the number of isolation flags was increased, there was still a risk that workers would be distracted by their work and slip between the isolation flags and enter the live line.

[0007] The present invention is intended to eliminate the above drawbacks. [Means for solving the problem]

[0008] The live line isolation net of the present invention is characterized in that it comprises a flexible net-shaped net body of a desired length, a net one-end fixed body fixed to a power line support body and fixing one end of the net body, a net other-end fixed body fixed to the power line support body and fixing the other end of the net body, and one or more net middle fixed bodies fixed to the power line support body and fixing the middle part of the net body.

[0009] The net body is also characterized in that it is formed in red color.

[0010] The intermediate fixing body is characterized in that it comprises an intermediate rod portion having a net intermediate fixing portion fixed to the net main body, and an intermediate base portion fixed to the power transmission line support.

[0011] The intermediate fixing portion is characterized in that it is made of a ring catch.

[0012] In addition, the net intermediate part fixing body for fixing the intermediate part of the live line isolation net of the present invention to the power line support is characterized in that it comprises an intermediate part rod part having a net intermediate part fixing part for fixing the intermediate part of a flexible net body of a desired length, one end side and the other end side of which are each fixed to the power line support, and an intermediate part base part fixed to the power line support.

[0013] The intermediate fixing portion is characterized in that it is made of a ring catch. Effect of the Invention

[0014] According to this device, a long net is stretched vertically (from one end to the other) to prevent approach to the live line (charging part), which provides a more physical means of preventing intrusion than the separation flags that were previously used, thereby increasing safety.

[0015] Furthermore, even if a flexible net is used, sagging and the like can be prevented because a specified location in the middle part of the net is fixed by the net middle part fixing body. [Brief description of the drawings]

[0016] [Figure 1] FIG. 2 is a side view of the hot line isolation net of the present invention; [Diagram 2] FIG. 2 is a front view of the live line isolation net of the present invention with a portion thereof omitted. [Diagram 3] This is a diagram showing the live line isolation net of this invention installed on a steel tower. [Figure 4] FIG. 2 is an explanatory diagram of a ring catch used in the present invention. [Diagram 5] FIG. 13 is an explanatory diagram of a conventional separation flag. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] The following describes an embodiment of the present invention with reference to the drawings. Fig. 1 is a side view of the live line isolation net attached to a tower, Fig. 2 is a front view of the live line isolation net with the middle part of the net omitted, and Fig. 3 is a view of the live line isolation net installed on a tower. EXAMPLES

[0018] (1. Description of the overall configuration of the live line isolation network 3)

[0019] The live line isolation net 3 of the present invention is attached to a power transmission line support such as a steel tower 1 as shown in Figs.

[0020] The live line isolation net 3 comprises, for example, a net main body 4, a net one-end side fixed body such as a net upper fixed body 5 which fixes one end side, such as the upper part of the net main body 4, to a power line support such as a steel tower 1, a net other-end side fixed body such as a net lower fixed body 6 which fixes the other end side, such as the lower part of the net main body 4, to the steel tower 1 or the like, and one or more net middle part fixed bodies 7 which fix the middle part of the net main body 4 to the steel tower 1 or the like.

[0021] In the following, an example will be described in which the long (strip-shaped) live line isolation net 3 is installed vertically on a tower or the like, but the live line isolation net 3 can also be installed horizontally or diagonally.

[0022] (2. Explanation of the network unit 4)

[0023] The net body 4 is, for example, a flexible net (mesh) having a rectangular elongated shape (rectangular strip shape) of a desired length extending vertically from the upper end to the lower end of a location to be separated from the live wire.

[0024] The shape of the net body 4 is not particularly limited, but may be, for example, 10 m to 20 m in length, 30 cm to 1 m in width, and 40 mm in mesh size.

[0025] Moreover, by making the net body 4 a conspicuous color such as red, the partitions can be easily identified.

[0026] (3. Explanation of the net upper fixed body 5)

[0027] In addition, the net upper fixed body 5 comprises, for example, a rod-shaped upper rod portion 5a extending horizontally along the upper end edge 4a of the net main body 4, having a net upper fixed portion 8 that fixes the upper end edge 4a, and an upper base portion 5b that is fixed to a power transmission line support such as a steel tower 1.

[0028] The net upper fixing portion 8 is, for example, a ring catch as shown in FIG. 4, provided on the upper rod portion 5a, or a plurality of ring catches provided at predetermined intervals.

[0029] Moreover, the length of the upper rod portion 5a is formed to be, for example, the same as or longer than the width of the net body 4.

[0030] (4. Explanation of the bottom fixed body 6 of the net)

[0031] In addition, the net lower fixed body 6 comprises, for example, a rod-shaped lower rod portion 6a extending horizontally along the lower end edge 4b ​​of the net main body 4, having a net lower fixed portion 9 that fixes the lower end edge 4b, and a lower base portion 6b that is fixed to a power transmission line support such as a steel tower 1.

[0032] The net lower fixing portion 9 is, for example, a ring catch as shown in FIG. 4, provided on the lower rod portion 6a, or a plurality of ring catches provided at predetermined intervals.

[0033] Moreover, the length of the lower rod portion 6a is formed to be, for example, the same as or longer than the width of the net body 4.

[0034] (5. Description of the net middle part fixing body 7)

[0035] In addition, the net intermediate portion fixing body 7 is composed of, for example, a horizontally extending rod-shaped intermediate portion rod portion 7a having a net intermediate portion fixing portion 10 that fixes the intermediate portion 4c of the net main body 4 in the vertical direction, and an intermediate portion base portion 7b that is fixed to a power transmission line support such as a steel tower 1.

[0036] The net intermediate fixing portion 10 is, for example, a ring catch as shown in FIG. 4, provided on the intermediate rod portion 7a, or a plurality of ring catches provided at predetermined intervals.

[0037] Moreover, the length of the upper rod portion 7a is formed to be, for example, the same as or longer than the width of the net body 3.

[0038] The wire diameter of the ring catch is smaller than the mesh size of the net body 4.

[0039] (6. Explanation of how to install the live line isolation net 3)

[0040] The method of installing the live line isolation net 3 of this invention involves attaching the upper rod portion 5a of the upper net fixed body 5 to the net main body 4, and also attaching it to the lower rod portion 6a of the lower net solid body 6, and then fixing the upper base portion 5b of the upper net fixed body 5 and the lower base portion 6b of the lower net fixed body 6 to a power line support such as a tower 1 so that the net main body 4 is in a taut state.

[0041] Then, one or more of the net intermediate part fixing bodies 7 are attached to the desired intermediate part of the net main body 4 at desired intervals in the vertical direction, and each base 7b of each net intermediate part individual body 7 is fixed to a steel tower 1 or the like, thereby preventing sagging, etc. of the net main body 4.

[0042] It is also possible to attach the net upper fixed body 5, the net lower fixed body 6, and the net middle fixed body 7 to the steel tower 1 or the like in advance, and then fix these to the net main body 4.

[0043] (7. Description of the Effects of the Invention)

[0044] According to this device, a long net is stretched vertically (from one end to the other) to prevent approach to the live line (charging part), which provides a more physical means of preventing intrusion than the separation flags that were previously used, thereby increasing safety.

[0045] Furthermore, even if a flexible net is used, sagging or the like can be prevented because a predetermined location of the middle part is fixed by the net middle part fixing body 7.

[0046] Furthermore, by combining the net with the ring chain, the intermediate fixing body 7 can be fixed regardless of the location of the net, and can be easily fixed.

[0047] In addition, by making the net itself red, the divisions are visually clear.

[0048] In addition, there is no need to deploy extra-high voltage close-up work monitors, which can reduce labor costs. [Explanation of symbols]

[0049] 1. Steel Tower 1a live wire 1b stop line 2 separation flag 3. Live line isolation net 4. Net body 4a Top edge 4b Bottom edge 4c middle part 5. Net upper fixed body 5a Rod part 5b base 6 Net bottom fixed body 6a Rod body 6b base 7 Net middle part fixed body 7a Rod part 7b base 8 Net upper fixing part 9 Net bottom fixing part 10 Net middle fixing part

Claims

1. A flexible net body having a desired length; A net one end side fixing body fixed to a power transmission line support for fixing one end side of the net body; A net other end side fixing body fixed to a power transmission line support for fixing the other end side of the net main body; A live line isolation net comprising one or more net middle part fixing bodies fixed to a power line support body for fixing the middle part of the net body.

2. The live line isolation net according to claim 1 , wherein the net body is formed in red.

3. The live line isolation net as described in claim 1, characterized in that the net intermediate portion fixed body comprises an intermediate rod portion having a net intermediate portion fixed portion fixed to the net main body, and an intermediate portion base portion fixed to the power transmission line support.

4. 4. The live line isolation net according to claim 3, wherein the net intermediate fixing portion comprises a ring catch.

5. A net intermediate part fixing body for fixing the intermediate part of a live line isolation net to a power transmission line support, characterized in that it comprises an intermediate part rod part having a net intermediate part fixing part for fixing the intermediate part of a flexible net body of a desired length, one end side and the other end side of which are each fixed to a power transmission line support, and an intermediate part base part fixed to the power transmission line support.

6. 6. The net middle part fixing body for fixing the middle part of the live line separation net to the power transmission line support according to claim 5, wherein the net middle part fixing part is made of a ring catch.

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