JP5390987B2 - Transmission line fall prevention device and installation method thereof - Google Patents

Description

The present invention relates to a power transmission line fall prevention device for preventing a fall of an overhead power transmission line and a method for installing the power transmission line fall prevention device.

As is well known, electric power is transported using an overhead power transmission line. Then, by visual observation or collecting a sample of the power transmission line to grasp the corrosion status of the overhead power transmission line and the situation of abnormal heat generation, it is confirmed whether the overhead power transmission line may be disconnected. When corrosion or abnormal heat generation is confirmed in the overhead power transmission line, the power transmission system is switched and the overhead power transmission line is newly replaced.

Patent Document 1 describes a transmission line load sensor for monitoring a load fluctuation of a transmission line, monitoring a load such as when snow accumulates on the transmission line, and a serious situation such as disconnection of the transmission line. The occurrence is prevented. In addition, a method of detecting the deterioration of the transmission line by applying a load sensor and detecting distortion of the transmission line has been studied.

On the other hand, Patent Document 2 describes a distribution line fall prevention device for preventing an electric shock accident when the distribution line is disconnected. The distribution line fall prevention device is installed with a certain gap between each distribution line, so that even if the distribution line is disconnected, one side is held by the distribution line fall prevention device. Preventing electric shock accidents by preventing the end of the wire from falling to the ground.

JP 2001-183248 A JP 2006-191773 A

However, since the total length of overhead transmission lines reaches 80,000 km, it is difficult to check the state of the entire length of overhead transmission lines. The confirmation work for the overhead power transmission line was very inefficient. For this reason, in recent years, there has been a demand for a device that prevents the overhead power transmission line from falling even if the overhead power transmission line is disconnected due to the poor efficiency of checking the overhead power transmission line.

In the method using the load sensor described in Patent Document 1, the detection accuracy is poor because the correlation between the distortion amount of the overhead power transmission line and the disconnection varies.

In the fall prevention device for distribution lines described in Patent Document 2, it is considered to install the fall prevention device at a certain interval on an overhead power transmission line between steel towers of several hundred meters, considering the work, cost, etc. In addition, it has been difficult to directly apply the fall prevention device for distribution lines to overhead transmission lines with heavy mass.

Accordingly, an object of the present invention is to provide an overhead power transmission line fall prevention device and an installation method thereof that can reliably prevent the overhead power transmission line from falling even when an overhead power transmission line having a long overall length and a heavy mass is disconnected. There is to do.

The aspect of the power transmission line fall prevention device of the present invention is a power transmission line fall prevention device for a plurality of overhead power transmission lines that are connected at both ends to a lever part attached to a steel tower via a retaining clamp and arranged at different heights. A connecting member disposed between the overhead power transmission lines and connected to the overhead power transmission line having different ends, and a linear member wound spirally around the overhead power transmission line, the linear member comprising: It is connected between the said clamp and the said insulator part, It is characterized by the above-mentioned .

Furthermore, another aspect of the power transmission line fall prevention device of the present invention is characterized in that the overhead power transmission line and the linear member are gripped by a grip portion of the connecting member .

According to another aspect of the power transmission line drop preventing device of the present invention, a vibration suppression device is further provided around the end of the overhead power transmission line, and both ends of the connecting member are disposed between the retaining clamp and the vibration suppression device. It is characterized by being connected to.

Another aspect of the power transmission line fall prevention device of the present invention is characterized in that a plurality of the linear members are wound around one overhead power transmission line , and both ends are connected to different locations.

The aspect of the installation method of the power transmission line fall prevention device of the present invention is a connection member disposed between overhead power transmission lines that are connected to a lever portion attached to a steel tower via a retaining clamp and disposed at different heights. An installation method of a power transmission line drop prevention device comprising: a linear member spirally wound around the overhead power transmission line, wherein the linear member is wound around the power transmission line at one end of the overhead power transmission line And connecting one end of the linear member between the retaining clamp and the insulator part, moving to the other end of the overhead power transmission line while grasping the other end of the linear member, and The other end of the linear member is connected between the retaining clamp at the other end of the overhead power transmission line and the insulator, and the overhead power transmission line and the linear member are gripped by the gripping portion of the connecting member. It is characterized by that.

According to the present invention, even when an overhead power transmission line falls, the load distribution of the overhead power transmission line can be realized by arranging the connecting member and the linear member in an appropriate place and gripping the overhead power transmission line, more reliably, The fall of the overhead power transmission line can be prevented.

It is the schematic which shows embodiment of the fall prevention apparatus of the overhead power transmission line which concerns on this invention. It is the schematic which shows the edge part of an overhead power transmission line. It is the schematic which expanded a part of linear member. It is the schematic of a connection member. It is the schematic which expanded between the retention clamp and the steel tower. It is the schematic which shows embodiment of the installation method of the fall prevention apparatus of the overhead power transmission line which concerns on this invention.

A power transmission line fall prevention device and an installation method thereof according to an embodiment of the present invention will be described with reference to FIGS. In addition, about each structural part which has the same function, the same code | symbol is attached | subjected and shown for simplification of illustration and description.

An embodiment according to a power transmission line fall prevention device according to the present invention will be described below with reference to FIGS. FIG. 1 shows a schematic diagram of the entire power transmission line fall prevention device, and FIGS. 2 to 5 are schematic diagrams of components of the power transmission line fall prevention device.

The power transmission line fall prevention device 100 in FIG. 1 has power transmission lines 1 (1a, 1b,
1c), the connecting member 9 is connected to the different transmission lines 1 at both ends, and the linear member 8 is wound around the transmission line 1 in a spiral manner. Connecting member 9
Are arranged in the vicinity of the retaining clamp 3 attached to both ends of the power transmission line 1, and both ends of the connecting member 9 are connected to the upper phase power transmission line 1a and the middle phase power transmission line 1b, and to the middle phase power transmission line 1b. Each is connected to the lower-phase power transmission line 1c. The linear member 8 is spirally wound over the entire length of the power transmission line 1, and both ends of the linear member 8 are connected between the retaining clamp 3 and the steel tower 2, respectively.

Thus, even when the power transmission line 1 is cut, the power transmission line 1 is prevented from falling by the linear member 8, and a different power transmission line 1 is connected by the connecting member 9. Can be distributed, and even when the power transmission line 1 is cut, it is possible to prevent the fall for a long time.

Further, the cause of the disconnection of the power transmission line 1 is a compression failure inside the retention clamp 3 when the retention clamp 3 is attached to the transmission line 1, a poor connection deterioration due to water entering the retention clamp 3, etc. In many cases, the power transmission line 1 is cut off at the attachment portion of the retaining clamp 3. Therefore, by connecting both ends of the linear member 8 between the retaining clamp 3 and the steel tower 2, it is possible to reliably prevent the overhead power transmission line from dropping.
Furthermore, by connecting the both ends of the linear member 8 to the terminal gripping fitting 7, the insulator portion 4
Etc. can be avoided, and the construction efficiency of the linear member 8 can be improved.

The end of the power transmission line 1 will be further described with reference to FIG. A vibration suppression device 6 is further attached around the end of the power transmission line 1, and this vibration suppression device 6 suppresses the transmission line 1 from vibrating due to wind or the like. Since the connection load of the attachment portion of the retaining clamp 3 to the power transmission line 1 is increased by the vibration suppressing device 6, the connecting member 9 is preferably disposed in the vicinity of the span side of the retaining clamp 3. It is desirable to arrange between the retaining clamp 3 and the vibration suppressing device 6. By disposing the connecting member 9 between the retaining clamp 3 and the vibration suppression device 6 in this way, the transmission when the power transmission line 1 is disconnected without impairing the vibration suppression effect of the power transmission line 1 by the vibration suppression device 6. It becomes possible to distribute the load with respect to the mass of the electric wire 1, and even when the transmission line 1 is cut, it is possible to prevent the transmission line 1 from falling for a long time.

Further, as described above, the retaining clamp 3 when the retaining clamp 3 is attached to the power transmission line 1.
Since the power transmission line 1 is often cut at the attachment portion of the retaining clamp 3 due to poor internal compression or poor connection deterioration due to water entering the retaining clamp 3, both ends of the connecting member 9 are It is desirable to connect within 2 m from the tip of the retaining clamp 3.

Further, the power transmission line 1 and the linear member 8 are fastened by the gripping portions 11 attached to both ends of the connecting member 9, so that the linear member 8 is retained between the clamp 3 and the tower 2, and the connecting member. 9 when the power transmission line 1 is disconnected, the load can be distributed with respect to the mass of the power transmission line 1, and even when the power transmission line 1 is disconnected, It is possible to reliably prevent the transmission line 1 from falling.

The linear member 8 is further demonstrated using FIG. FIG. 3 is an enlarged schematic view of a part of the linear member. The linear member 8 is spirally wound around the power transmission line 1 at a predetermined interval. The winding interval and the number of windings of the linear member 8 can be appropriately selected depending on the length and mass of the power transmission line 1.

As the linear member 8, a metal material such as an aluminum-clad steel wire or a steel wire, a non-metallic material, a composite member thereof, or a member obtained by combining them can be used. As the non-metallic material, polyamide fiber, aramid fiber, polyparaphenylene benzobisoxazole (PBO) fiber, carbon fiber, glass fiber, and other fiber filaments can be used. In particular, it is preferable to use a fiber reinforced plastic (FRP) composed of a polyester resin reinforced with an aramid fiber having high strength, stable performance, and long life.

As the cross-sectional shape of the linear member 8, various shapes such as a circular shape, an elliptical shape, and a rectangular shape can be applied. The linear member 8 may be a single wire that combines the materials and cross-sectional shapes described above, or may be twisted or processed into a braided shape. Moreover, the linear member 8 should just have a certain amount of breaking load, and it is especially desirable to have more than the breaking load of the power transmission line 1.

The connecting member 9 will be further described with reference to FIG. 4A and 4B are schematic views of the connecting member 9, FIG. 4A is a front view, and FIG. 4B is a side view. The connecting member 9 is mainly the transmission line 1
It is comprised by the holding part 11 and the connection part 13 which are connected to. Space potential alleviating horns 12 are attached to both ends of the connecting portion 13, and the connecting portion 13 and the gripping portion 11 are connected via the horn 12 to constitute a connecting member 9. And the connection part 13 is formed with the insulating material in order to ensure the insulation between the power transmission lines 1. FIG. For example, a coated FRP, a coated organic fiber, or an insulator can be applied. The gripping part 11 is composed of a protective member wound around the power transmission line 1 and a fixing member that fixes the power transmission line 1.

The configuration between the retaining clamp 3 and the steel tower 2 will be described with reference to FIG. FIG. 5 is an enlarged schematic view between the retaining clamp 3 and the steel tower 2. A retaining clamp 3 is attached to the end of the power transmission line 1, and a branch jumper clamp 16 is connected to the retaining clamp 3, and a jumper wire 10 is connected to the jumper clamp 16. Further, a terminal gripping metal fitting 7 is attached to the holding clamp 3, and the terminal gripping metal piece 7 is opposite to the holding clamp,
An insulator portion 4 having insulation characteristics such as an insulator is connected. On the opposite side of the insulator part 4 from the terminal gripping metal fitting 7, a gripping metal fitting 17 is further attached, and a snow accretion preventing member 1 for preventing snow accretion.
The power transmission line 1 is fixed to the steel tower 2 through 5. Moreover, the horn 18 which prevents destruction of the insulator part 4 grade | etc., Is arrange | positioned at the both ends of the insulator part 4 by releasing the electric charge by a lightning strike.

The linear member 8 is wound around the power transmission line 1, and the end of the linear member 8 is connected to the terminal gripping fitting 7. When the linear member 8 has a sufficient withstand voltage, the end of the linear member 8 can be connected to the holding bracket 17 or the tower-side holding bracket 5, but the insulation of the linear member 8 It is particularly preferable that the end portion of the linear member 8 is connected to the terminal gripping fitting 7 in consideration of insulation breakage due to shortage or the like.

As described above, FIGS. 1 to 5 illustrate the case where the number of the linear members 8 is one, but it is more preferable to use a plurality of the linear members 8. In this case, it becomes possible to distribute the load with respect to the mass of the power transmission line 1 by changing the connection location of the end of each linear member 8 respectively.
Even when the power transmission line 1 is disconnected, it is possible to reliably prevent the power transmission line 1 from falling for a long time.

Next, an embodiment according to the installation method of the power transmission line fall prevention device according to the present invention is shown in FIGS.
This will be described below using (c).

FIG. 6A shows a diagram in which the transmission line 1 is stretched between the A steel tower 2 and the B steel tower 2, and the linear member 8 is wound from the A steel tower toward the B steel tower. In the A steel tower, one end of the linear member 8 is connected to the terminal gripping metal fitting 7 of the A steel tower, and the transmission line 1 is determined based on the predetermined number of turns of the linear member 8 around the transmission line 1. The linear member 8 is wound around. Here, the other end 8a of the linear member 8 is in an open state.

Next, in FIG.6 (b), while moving the other end part 8a of the wound linear member 8 to the B steel tower, the other end part 8a is connected to the terminal holding metal fitting 7 of the B steel tower. . Thus, the winding of the linear member 8 around the power transmission line 1 is completed.

Next, in FIG. 6C, the coupling member 9 is disposed between the power transmission lines 1 by connecting the gripping portions 11 of the coupling members 9 to the power transmission lines 1. Moreover, the power transmission line 1 is further connected to the grip 11.
And the linear member 8 are fastened together.

Thus, by installing a power transmission line fall prevention device, over a long period of time with simple construction,
It is possible to reliably prevent the transmission line from falling.

DESCRIPTION OF SYMBOLS 100 Transmission line fall prevention apparatus 1 Transmission line 2 Steel tower 3 Holding clamp 4 Insulator part 5, Tower side holding metal fitting 6 Vibration suppression apparatus 7 Terminal holding metal fitting 8 Linear member 9 Connecting member 10 Jumper wire 11 Holding part 12 Horn 13 Connecting part 15 Snow accretion prevention member 16 Jumper clamp 17 Grip metal fitting 18 Horn

Claims (5)

In the transmission line fall prevention device for a plurality of overhead power transmission lines , both ends of which are connected to the insulator part attached to the steel tower via the retaining clamps and arranged at different heights,
A connecting member disposed between the overhead power transmission lines and connected to the overhead power transmission lines at different ends.
A linear member spirally wound around the overhead power transmission line, and a power transmission line fall prevention device comprising :
The power transmission line drop preventing device , wherein the linear member is connected between the retaining clamp and the lever portion .   The power transmission line drop prevention device according to claim 1, wherein the overhead power transmission line and the linear member are gripped by a grip portion of the connecting member. A vibration suppressing device is further provided around the end of the overhead power transmission line,
The transmission line fall prevention device according to claim 1 or 2, wherein both ends of the connecting member are connected between the holding clamp and the vibration suppressing device. The power transmission line fall prevention device according to any one of claims 1 to 3 , wherein a plurality of the linear members are wound around a single overhead power transmission line , and both ends are connected to different locations. . Is connected via a clamp anchor in insulator portion attached to pylons, different and high coupling disposed between arranged overhead power transmission line in of member, the linear member helically wound overhead lines In the installation method of the transmission line fall prevention device provided with
At one end of the overhead power transmission line, the linear member is wrapped around the power transmission line, and one end of the linear member is connected between the retaining clamp and the insulator part ,
While holding the other end of the linear member, it is moved to the other end of the overhead lines, and the anchor clamp at the other end of the other end of the linear member the overhead transmission lines wherein Connect between the insulators ,
The installation method of the power transmission line fall prevention apparatus characterized by gripping the said overhead power transmission line and the said linear member with the holding part of the said connection member.

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