KR101422743B1 - Supporter for cable of electric power line - Google Patents

Abstract

The present invention relates to a supporter for a cable of a transmission line. The present invention includes left and right worms formed of a right helix and a left helix at left and right sides of a motor axis of a driving motor capable of performing reverse rotation; left and right worm wheels meshing with the left and right worms, respectively; left and right pinions coaxially installed with the left and right worm wheels; and left and right racks meshing with the left and right pinions, respectively and connected to an insulator connected to a process transmission cable through a connection bar. Since a process transmission cable of both sides may be supported, tension may be attenuated and adjusted by one driving motor without using high pressure gas so that an installation cost of a transmission tower may be minimized. Constituent elements such as the driving motor, the worm, the worm wheel, the pinion, the rack, a connector, and a temperature sensor to support the process transmission cable, and to attenuate and adjust tension are arranged inside a protective cover so that a structure is simple. Installation is completed by only fixing the protective cover to an arm of the transmission tower so that installation is easy in the transmission tower. Constituent elements are installed inside the protective cover to prevent the constituent elements from being polluted due to snow, rain, and dust so that an erroneous operation or an impossible operation is prevented.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable support for a transmission line,

The present invention relates to a cable support for a transmission line, and more particularly, it is possible to mitigate and adjust the tension of the transmission transmission cables on both sides by means of a single drive motor without using high pressure gas, thereby minimizing the installation cost of the transmission tower And the elements are arranged in an inline structure. However, the structure is simple, and it is easy to install on the transmission tower, and the operating elements for reducing tension and adjusting are not exposed to the outside, so that they are not contaminated by snow, rain, dust, Thereby preventing the cable from being brought into an inoperable state.

Generally, the power generated by a power plant is converted into high-voltage power suitable for transmission in a substation, and is transmitted through a transmission transmission cable supported in an insulated state via an insulator to a transmission tower installed at regular intervals on the ground.

The transmission tower is installed in a standard tower which is used for standard span according to the length of the span (the distance between the support points of the wire between the tower and the tower) and in a place where it can not be used other standard tower And special steel towers.

Standard steel towers are divided into rectangular steel towers, square steel towers, gantry towers, woofer steel towers, revolving steel towers and MC (Motor Columbus) steel towers.

Also, it can be divided into straight tower, angled tower, anchor tower, and strain tower depending on the purpose of use.

In Korea, rectangular steel towers designed to have the same strength of the steel towers in the direction of the cable track are used mainly among the standard steel towers to be applied between the short diameter, because the design is easy and the safety is high.

The square pylon is composed of four main posts (main posts) and bottom posts (main posts), which are fixed by anchors in the concrete block at the bottom of the ground. Horizontal and reinforced materials, (Not shown).

Both ends of the machined transmission cable are supported in an insulated state at the lower end of a suspending insulator, which is suspended from an arm of an adjacent steel tower.

Thus, the working transmission cable supported by the power transmission tower has a change in tension as the temperature changes. That is, it is stretched due to high temperature in summer, and contracted due to low temperature in winter, resulting in change of tension.

8, the tension relieving apparatus 1 is mounted on the arm A of the power transmission tower and the connecting member 2 provided on the tension relieving apparatus 1 is connected to the connecting member 2 through the insulator 4 The processed transmission cable 3 is connected and the processed transmission cable 3 is pulled if the air temperature is high and the cable transmission line A is connected to the transmission line for controlling the tension applied to the transmission transmission cable 3 by loosening the transmission transmission cable ) Are used.

However, the conventional tension-reducing apparatus is liable to be damaged due to use for a long period of time or an external force, and it can not be immediately confirmed whether it is damaged, so that it can not be quickly coped with. have.

As a conventional prior art, there is provided a tension relieving device which is provided on an arm member of a transmission tower and is connected to an insulator arranged on the rear side so as to control a tension of a working transmission cable connected to an insulator, A cylinder provided in the arm member; A piston which is provided inside the cylinder so as to be able to move back and forth so as to divide an internal insertion portion of the cylinder into a gas accommodating portion at the rear side and a first spring accommodating portion at the front side and a gas accommodated in the gas accommodating portion and pressurizing the piston to advance, A tension adjusting mechanism including a first spring installed in the receiving portion and pressing the piston so as to retract the piston, and a connecting member having one end connected to the rear surface of the piston and the other end extending to the rear of the piston and connected to the insulator; A display panel including a warning plate having a hooking groove formed at its tip end and a base end thereof rotatably fixed to the cylinder, and an elastic member elastically supporting the warning plate so as to be rotated; A luminescent lamp mounted on a warning plate or cylinder; A control unit for controlling the operation of the luminescent lamp; A sensing sensor connected to the control unit; A latching member which is provided at one end with a protrusion and engages with a latching groove of the warning plate at the other end to form a latching jaw that horizontally fixes the warning plate and is slidably installed in the cylinder so as to turn ON the sensor at the time of backward movement, And a second spring elastically biasing the engaging jaws so that they engage with each other; A moving member having a long hole formed in the outer surface thereof along the longitudinal direction and having one end fixed to the front surface of the piston and the other end extending outside the cylinder; The tension of the working transmission cable is automatically adjusted by using the inflation force of the gas, and the tension of the working transmission cable can be immediately recognized from the outside in case of damage and can be quickly recovered. Cable support "is disclosed in Korean Patent Registration No. 10-0809063 (registered on February 25, 2008).

However, the above-mentioned "cable support to the transmission line" of the prior art is mainly used for transmission of ultra-high voltage of 245 kV high voltage and 765 kV ultra high voltage power from 66 kV high voltage power. In Korea, In order to provide a high-pressure gas, it is necessary to equip each transmission tower with equipment including a motor, a gas pump and a reserve tank. Therefore, There is a problem that the installation cost is increased.

In addition, as a prior art, there are a drive unit installed on one of the steel towers for adjusting the tension of the transmission / distribution line, an optical signal main module and an optical signal auxiliary module installed on one side and the other side of the other side of the transmission / And a control unit for driving the driving unit in accordance with the detection information in the tension sensing unit. When a deflection of the line occurs, the control unit automatically detects the deflection of the line, It is possible to effectively prevent short-circuiting or disconnection due to the deflection of the line, and to prevent excessive pulling of the line when pulling one end of the line in order to maintain the tension of the line, "Line tension control equipment for transmission tower and pylon" was established in Korea Registration No. 10-0978139 discloses a call (2010.08.19. Registered).

Also, the above-mentioned prior arts have a problem in that the tension is relaxed or the tension maintaining operation is not performed because the operation element for tension reduction or tension maintenance is exposed to the outside, so that it is contaminated by snow, rain and dust, have.

Therefore, the tension of the working transmission cable can be eased only by the rotational force of the driving motor without using the high-pressure gas, so that the installation cost of the transmission tower can be minimized, and it is simple and easy to install in the transmission tower, It is necessary to develop a cable support for a transmission line so that the element is not exposed to the outside and is not contaminated by snow, rain, dust or the like, thereby preventing a malfunction or an inoperable state.

Korea Registered Patent No. 10-0809063 (Registered on February 25, 2008) "Cable Support for Transmission Line" Korea Patent Registration No. 10-0978139 (Registered on Aug. 19, 2010) "Line tension maintenance device for transmission /

Therefore, it is an object of the present invention to provide a power transmission cable capable of minimizing the installation cost of the power transmission tower by supporting the working transmission cables on both sides and reducing the tension and adjusting the tension by using a single driving motor without using high- And the structure for the tension reduction and the tension adjustment are arranged inside the protective cover so that the structure is simple and the installation is completed by fixing the protective cover to the arm of the transmission tower. The present invention provides a cable support for a transmission line that prevents components from being contaminated by snow, rain, dust, and the like, thereby preventing malfunction or inoperability.

In order to achieve the above object, a cable support of a transmission line according to the present invention includes a cover base fixed to an arm of a transmission tower, and a protective cover provided on an upper portion of the cover base; A motor main body mounted on an upper surface of the cover base, and a motor shaft protruding from both ends of the motor main body, Left and right worms provided at both ends of the motor shaft and having different helical directions; Left and right worm wheels rotatably supported on the cover base and engaged with the left and right worms; left and right pinions supported on the cover base so as to be rotatable coaxially with the worm wheel; Left and right racks slidably mounted to the cover base to engage with the left and right pinions; Connecting means connecting the inner end of the insulator to which the left and right working transmission cables are connected and the outer end of the left and right racks; A temperature sensor installed inside the protective cover; And a control unit for forwardly or reversely rotating the drive motor according to a detection signal of the temperature sensor,

Wherein the cover base constituting the protective cover is made of a metal material, the upper cover is made of synthetic resin, the lower surface of the cover base is provided with a mounting fixing piece for fixing to the arm of the transmission tower,

Wherein the left and right worms are rotatably supported by free end portions on a shaft supporting piece provided on an upper surface of the cover base,

Wherein the left and right worm wheels are fixed to left and right rotation shafts rotatably supported by shaft supporting pieces provided on an upper surface of the cover base so as to rotate together with the rotation shafts,

The left and right pinions are fixed to the other ends of the left and right rotation shafts and are configured to rotate together with the left and right rotation shafts and the left and right worm wheels,

The left and right racks are configured to be slidably guided laterally by guide rails provided on the upper surface of the cover base,

The right and left connecting means comprise connecting rods connecting the outer ends of the right and left racks and the inner ends of the insulators,

Wherein the temperature sensor is fixedly installed in a module form on an upper surface of a cover base,

The control unit may be installed on the upper surface of the cover base,

And outputs a forward rotation command or a reverse rotation command to the driving motor in accordance with the temperature sensing signal of the temperature sensor.

According to the present invention, the right and left spiral worms, left and right worm wheels, and left and right pinions, which are provided coaxially with the left and right worm wheels, And the left and right racks which are connected to the insulator through which the working transmission cable is connected through the connecting rods. It is possible to support the working transmission cables on both sides by a single driving motor without using high-pressure gas, The installation cost of the power transmission tower can be minimized and the components for supporting, tensioning and tensioning the working transmission cable such as drive motor, worm, worm wheel, pinion, rack, connecting means, The structure is simple and the installation is completed only by fixing the protective cover to the arm of the transmission tower. Easy installation of the whole tower, and because the components are installed in the interior of the protective cover there is an effect that no two days do not contaminated due to rain, snow and dust to the abnormal operation or inoperative state.

1 to 7 show a preferred embodiment of a cable support for a transmission line according to the present invention,
1 is a perspective view,
2 is a perspective view showing a state in which a cover is removed,
3 and 4 are exploded perspective views seen from different directions,
Fig. 5 is a longitudinal front view showing the process of reducing tension and controlling the tension transmission cable,
FIG. 6 is a transverse plan view showing the process of tension reduction and adjustment of the working transmission cable,
7 is a functional block diagram of the control circuit section,
And,
8 is a schematic view of a cable support of a transmission line according to the prior art.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a cable support for a transmission line according to the present invention will be described in detail with reference to the accompanying drawings.

In the following description, the through holes through which the various bolts are passed and the fastening holes to which the bolts are fastened are shown only in the drawings, and the reference numerals and explanations thereof will be omitted.

1 to 7, a cable support for a transmission line according to the present invention includes a cover base 11 fixed to an arm A of a transmission tower, A protective cover (10) provided with an upper cover (12); A motor main body 21 mounted on an upper surface of the cover base 11 and a motor shaft 22 protruding from both ends of the motor main body 21; Left and right worms (30a, 30b) provided at both ends of the motor shaft (22) and having different helical directions from each other; Left and right worm wheels 40a and 40b which are rotatably supported on the cover base 11 so as to be engaged with the left and right worms 30a and 30b and a pair of left and right worm wheels 40a and 40b which are coaxial with the worm wheels 40a and 40b Left and right pinions (50a, 50b) rotatably supported; Left and right racks (60a, 60b) slidably mounted to the cover base (11) to be engaged with the left and right pinions (50a, 50b); Connecting means (70a, 70b) connecting the inner end of the insulator (1, 2) to which the left and right working transmission cables (L1, L2) are connected and the outer ends of the left and right racks (60a, 60b); A temperature sensing sensor 80 installed inside the protective cover 10; And a control unit (90) for rotating or reversing the drive motor (20) in accordance with a detection signal of the temperature sensor (80).

The cover base 11 constituting the protective cover 10 is fixed to the racks 60a and 60b while the drive motor 20 is mounted and the worm wheels 40a and 40b and the pinions 50a and 50b are rotatably supported. The upper cover 12 is provided with only the driving motor 20, the worm wheels 40a and 40b, and the pinions 50a and 50b ), The racks 60a and 60b, the temperature sensing sensor 80, and the control unit 90, which are required to have a protective function rather than a mechanical strength.

The cover base 11 constituting the protective cover 10 is formed in a plate shape, and the upper cover 12 is formed in a roof shape.

The upper cover 12 may include vertical walls 13 and inclined portions 14. The inner wall of the vertical wall 13 may be in close contact with the front, rear, left, and right sides of the cover base 11, The coupling bolts 15 horizontally penetrating the lower end portion of the upright wall 13 can be coupled by being fastened to the front, rear, left, and right sides of the cover base 11.

Between the front and rear left and right surfaces of the cover base 11 and the inner surface of the front and rear vertical walls 13 of the upper cover 12, And a gasket (not shown) may be inserted to prevent dust from intruding.

The lower surface of the cover base 11 is provided with a mounting fixing piece 16 for fixing to the arm A of the transmission tower.

The mounting fixing member 16 is formed in the shape of a square pipe into which the arm A of the transmission tower is inserted and the arm A is inserted into the mounting fixing member 16 and the mounting fixing member 16 and the arm A The mounting fixing member 16 can be fixed to the arm A by the fixing bolt 17 passing through the fixing bolt 17 and the fixing nut 18 fastened thereto.

The mounting fixture 16 may be formed integrally with the cover base 11 or may be formed by welding a square pipe to the lower surface of the cover base 11 or bolting the same.

A motor base 23 is integrally formed in the motor main body 21 of the drive motor 20 and is fixed to the motor base 23 and a plurality of mounting bolts 24 passing through the cover base 11, Can be mounted on the cover base (11) by the mounting nut (25).

In the drawing, illustration and description of conventional motor components such as the stator of the drive motor 20, the rotor, and the power supply system are omitted.

The left and right worms 30a and 30b may be formed by forming a worm on the motor shaft 22 itself or by separately welding a worm to the motor shaft 22 or by a conventional shaft coupler have.

The free ends of the left and right worms 30a and 30b are rotatably supported on the shaft supporting pieces 31a and 31b provided on the upper surface of the cover base 11. [ At this time, bearings (not shown) are inserted between the outer circumferential surfaces of the free ends of the left and right worms 30a and 30b and the shaft holes 32a and 32b of the shaft supporting pieces 31a and 31b to smoothly rotate the left and right worms 30a and 30b .

The left and right worm wheels 40a and 40b are fixed to left and right rotary shafts 41a and 41b rotatably supported by shaft supporting pieces 42a and 42b provided on the upper surface of the cover base 11, As shown in FIG. At this time, a bearing (not shown) is inserted between the left and right rotary shafts 41a and 41b and the shaft holes 43a and 43b of the shaft supporting pieces 42a and 42b to smoothly rotate the left and right rotary shafts 41a and 41b have.

The left worm 30a and the left worm wheel 40a are formed of right spiral and the right worm 30b and the right worm wheel 40b are formed of left spirals so that the left worm wheel 40a and the right worm wheel 40b are opposed to each other As shown in Fig.

The left and right pinions 50a and 50b are fixed to the other ends of the left and right rotation shafts 41a and 41b and are configured to rotate together with the left and right rotation shafts 41a and 41b and the left and right worm wheels 40a and 40b.

The left and right racks 60a and 60b are configured to be slidable laterally by guide rails 61a and 61b provided on the upper surface of the cover base 11. [

The guide rails 61a and 61b may be integrally formed on the upper surface of the cover base 11 or may be coupled to the upper surface of the cover base 11 by welding or bolting.

The left and right connection means 70a and 70b may be formed of connecting rods 71a and 71b connecting the outer ends of the left and right racks 60a and 60b and the inner ends of the insulators 1 and 2.

The outer ends of the left and right racks 60a and 60b and the inner ends of the connecting rods 71a and 71b are formed with threaded grooves (not shown) on the outer end surfaces of the left and right racks 60a and 60b, (Not shown) is formed at the inner end of the left and right racks 60a and 60b so that the male threaded portion is fastened to the threaded groove and the fastening nut (not shown) fastened to the male threaded portion and closely fitted to the outer end surface of the left and right racks 60a and 60b And the outer ends of the connecting rods 71a and 71b can be connected in an inserted state at the inner end of the insulators 1 and 2. Such a connecting structure can be formed by a conventional method, And therefore, detailed description thereof will be omitted.

The temperature sensor 80 may be fixed on the upper surface of the cover base 11 in a module form.

The control unit 90 may be installed on the upper surface of the cover base 11 in the form of a control box.

The control unit 90 is configured to output a forward rotation command or a reverse rotation command to the driving motor 20 according to the ambient temperature sensed by the temperature sensor 80. Since the annual temperature distribution indicates the intermediate temperature range A forward rotation command is given to the drive motor 20 in a high temperature range and a reverse rotation command is issued to the drive motor 20 in a low temperature range without giving a forward rotation command or a reverse rotation command to the drive motor 20 Respectively.

That is, the control unit 90 generally does not operate the spring 20 in the spring and fall when the temperature is maintained in the intermediate temperature range. In the summer when the temperature is maintained in the high temperature range, And the drive motor 20 is configured to rotate in the winter when the temperature is maintained in the low temperature range.

Here, the forward rotation means that the drive motor 20 rotates counterclockwise when viewed from the right, and the reverse rotation means that the drive motor 20 rotates clockwise when viewed from the right.

The power required for the drive motor 20, the temperature sensor 80 and the control unit 90 is supplied to the power transmission tower to generate electric power or electric current and power generated from the solar battery unit SC And is supplied by the battery B to be supplied.

The battery B can be installed in a distribution cabinet (not shown) provided at a lower portion of the transmission tower. The control unit 90 may also be installed in a cabinet for distribution.

The power of the battery B installed in the power distribution cabinet can be supplied by an electric wire passing through the inside of a wire protecting tube (not shown) installed in the transmission tower.

Here, the solar cell unit, the battery, the distribution cabinet, the wiring, and the like are shown and described as a functional block diagram (see Fig. 7), and a mechanical illustration and description are omitted.

The cable support rods of the transmission line according to the present invention are installed in the factory in the factory so that the drive motors 20, left and right worms 30a and 30b, left and right worm wheels 40a and 40b, left and right pinions 50a and 50b, left and right racks 60a and 60b, The fixing members 16 are attached to the arm A of the power transmission tower so that the connecting means 70a and 70b, the temperature sensor 80 and the control unit 90 are installed on the protective cover 10, The cable support of the transmission line according to the present invention can be quickly and simply installed on the transmission tower.

Hereinafter, a process of relieving the tension of the working transmission cables L1 and L2 and the jump line L3 by the cable support of the transmission line according to the present embodiment will be described.

The processing transmission cables L1 and L2 are expanded or contracted according to the temperature. When the cable is elongated or contracted, the processing is performed downward. When the cable is contracted, the tension is increased and the transmission transmission cable L1 , L2 may become unstable.

In order to cope with this, in the present invention, the driving motor 20, the worms 30a and 30b, the worm wheels 40a and 40b, the pinions 50a and 50b, the racks 60a and 60b, the connecting means 70, The expansion and contraction of the working transmission cables L1 and L2 can be compensated by the control unit 80 and the control unit 90. [

5 (a) and 6 (a) show a state in which the transmission lines L1 and L2 do not expand and contract beyond the normal range in the middle temperature range as in the case of spring and autumn, 6 (b) shows a state in which deflection of the transmission lines L1 and L2 is compensated by pulling transmission lines L1 and L2 extending over a normal range in a high temperature range as in the summer, And 6 (c) show a state in which the tension of the transmission lines L1 and L2 is compensated by pushing out the transmission lines L1 and L2 contracted beyond the normal range in the low temperature range as in the winter.

The left and right racks 60a and 60b and the connecting rods 71a and 71b are located at right and left sides as shown in FIG. 5 (a) and FIG. 6 (a) It is in a state of having a movable margin.

In the case where the transmission power transmission cables L1 and L2 are in a high temperature range such as summer, the temperature sensor 80 senses this and outputs a temperature sensing signal. The controller 90 controls the temperature sensor 80 to output a reverse rotation command in response to the temperature sensing signal, and the driving motor 20 is rotated in the reverse direction.

When the drive motor 20 is rotated in the reverse direction, the left and right worms 30a and 30b provided at both ends of the motor shaft 22 rotate in the reverse direction.

The left worm wheel 40a engaged with the left worm 30a formed in the right spiral is rotated counterclockwise and the left pinion 50a rotated coaxially with the left worm wheel 40a is rotated in the counterclockwise direction, The left rack 60a engaged with the pinion 50a moves to the right and pulls the insulator 1 connected to the connecting rod 71a and the working transmission cable L1 to the right side and the right worm 30a formed to the left spiral The right side worm wheel 40b is rotated in the clockwise direction and the right side pinion 50b rotating in the same direction as the right side worm wheel 40a is rotated in the clockwise direction and the right side rack 60b engaged with the right side pinion 50b And moves the insulator 2 connected to the connecting rod 71b and the working transmission cable L2 to the left side while moving to the left side (refer to FIG. 5 (b) and FIG. 6 (b)).

Accordingly, the tension of the elongated transmission transmission cables L1 and L2 can be adjusted so that the transmission transmission cables L1 and L2 can be stably supported on the arm A of the transmission tower without falling down.

On the other hand, when the transmission power transmission cables L1 and L2 are in a low temperature range such as winter, the temperature sensing sensor 80 senses the temperature sensing signal and outputs a temperature sensing signal. The control unit 80 outputs a forward rotation command according to the temperature sensing signal transmitted from the control unit 80, and the driving motor 20 is rotated forward.

When the drive motor 20 is rotated forward, the left and right worms 30a and 30b provided at both ends of the motor shaft 22 rotate forward.

The left worm wheel 40a engaged with the left worm 30a formed in the right spiral is rotated in the clockwise direction and the left pinion 50a rotated coaxially with the left worm wheel 40a is rotated in the clockwise direction, The left rack 60a engaged with the connecting rods 50a moves leftward and pushes the insulator 1 and the working transmission cable L1 connected to each other through the connecting rod 71a to the left,

The right worm wheel 40b engaged with the right worm 30b formed in the left spiral is rotated counterclockwise and the right pinion 50b rotating coaxially with the right worm wheel 40b is rotated in the counterclockwise direction, The right rack 60b engaged with the pinion 50b moves to the right and pushes the insulator 2 and the working transmission cable L2 connected to each other through the connecting rod 71b to the right (Figs. 5 (c) and 6 (c)].

As a result, the tension of the contracted transmission transmission cables L1 and L2 is relaxed and the transmission transmission cables L1 and L2 can be stably supported on the arm A of the transmission tower.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or essential characteristics thereof. Therefore, the embodiments disclosed in the present invention are not intended to limit the scope of the present invention but to limit the scope of the technical idea of the present invention. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas falling within the scope of the same shall be construed as falling within the scope of the present invention.

A: Arm of power transmission tower L1, L2: Processing transmission cable
1, 2: Insulator 100: Protective cover
20: drive motor 30a, 30b: worm
40a, 40b: worm wheel 50a, 50b: pinion
60a, 60b: racks 71a, 71b: connecting rod
80: Temperature sensor 90:
SC: Solar cell unit B: Battery

Claims (1)

A protective cover 10 having a cover base 11 fixed to the arm A of the transmission tower and an upper cover 12 installed on the cover base 11; A motor main body 21 mounted on an upper surface of the cover base 11 and a motor shaft 22 protruding from both ends of the motor main body 21; Left and right worms (30a, 30b) provided at both ends of the motor shaft (22) and having different helical directions from each other; Left and right worm wheels 40a and 40b which are rotatably supported on the cover base 11 so as to be engaged with the left and right worms 30a and 30b and a pair of left and right worm wheels 40a and 40b which are coaxial with the worm wheels 40a and 40b Left and right pinions (50a, 50b) rotatably supported; Left and right racks (60a, 60b) slidably mounted to the cover base (11) to be engaged with the left and right pinions (50a, 50b); Connecting means (70a, 70b) connecting the inner end of the insulator (1, 2) to which the left and right working transmission cables (L1, L2) are connected and the outer ends of the left and right racks (60a, 60b); A temperature sensing sensor 80 installed inside the protective cover 10; And a control unit (90) for forward or reverse rotation of the driving motor (20) according to a detection signal of the temperature sensor (80)
The cover base 11 constituting the protective cover 10 is made of a metal material and the upper cover 12 is made of a synthetic resin and fixed to the arm A of the power transmission tower at the lower surface of the cover base 11. [ A fixing member 16 for mounting is provided,
The left and right worms 30a and 30b are rotatably supported on the shaft supporting pieces 31a and 31b provided on the upper surface of the cover base 11,
The left and right worm wheels 40a and 40b are fixed to left and right rotating shafts 41a and 41b rotatably supported by shaft supporting pieces 42a and 42b provided on the upper surface of the cover base 11, 41a, 41b,
The left and right pinions 50a and 50b are fixed to the other ends of the left and right rotation shafts 41a and 41b and are configured to rotate together with the left and right rotation shafts 41a and 41b and the left and right worm wheels 40a and 40b,
The left and right racks 60a and 60b are slidably guided to the left and right by guide rails 61a and 61b provided on the upper surface of the cover base 11,
The left and right connecting means 70a and 70b are formed of connecting rods 71a and 71b connecting the outer ends of the left and right racks 60a and 60b and the inner ends of the insulators 1 and 2,
The temperature sensor 80 is fixedly installed in the form of a module on the upper surface of the cover base 11,
The control unit 90 is installed on the top surface of the cover base 11 and receives a temperature sensing signal of the temperature sensing sensor 80 to output a forward rotation command signal to the driving motor 20, Or to output a reverse rotation command signal.

Images