KR101804159B1 - Device for reducing tension on overhead electric line of transmission tower - Google Patents

Abstract

Disclosed is a device for reducing tension for an electric transmission tower of a distribution line for power transmission. According to an embodiment of the present invention, the device for reducing tension for an electric transmission tower of a distribution line for power transmission comprises: a housing; a tension adjusting portion; a pair angle detecting portions; and a control portion. The device for reducing tension is able to adjust the length of the distribution line for power transmission in response to an external force applied to the distribution lien for power transmission so that tension applied to the distribution line for power transmission can be adjusted, and thus, the service life of the electric transmission tower and the distribution line for power transmission can be extended. When a tension greater than a predetermined value is applied to the distribution line for power transmission, the length of the distribution line for power transmission can be extended by a torque limiter, thereby preventing an accident caused by breakage of the distribution line for power transmission. If excessive tension is applied to the distribution line for power transmission, emergency signals can be sent to save resources for maintaining and repairing the electric transmission tower and the distribution line for power transmission.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a tension relieving device for a transmission tower of a power transmission line,

[0001] The present invention relates to a tension relieving device for a transmission tower of a power transmission line, and more particularly to a tension relieving device for a power transmission tower which is capable of preventing breakage of a transmission tower and a transmission- And more particularly, to a tension relieving device for a transmission tower of a power transmission line capable of extending its service life.

The power generated by the power plant is supplied to the customer through the transmission cable installed in the transmission tower. At this time, if the distance between the power plant and the demander is far, the voltage is increased greatly to reduce power loss during power transmission.

Although it is possible to prevent electric shock accident and to limit the utilization of land, there is an advantage that the transmission cable is buried in the ground. However, the transmission cable must have a covering capable of inserting a high voltage current in the ground, There is a disadvantage that it is difficult to embed in the terrain.

Therefore, a method is generally used in which a power transmission tower, which is generally a steel structure, is installed on the ground at appropriate intervals, and a transmission cable is fixed to an insulator, such as an insulator, on the arm of the transmission tower.

In this case, the transmission cable is generally a spiral, so if it comes in contact with people or other objects, an electric shock occurs. Therefore, the transmission cable is installed at a predetermined height from the ground, and this transmission cable is referred to as a transmission processing wire.

Since the processed wire for transmission is exposed to the atmosphere, its length is elongated and contracted according to the temperature change due to temperature or the like. In addition, uneven force is exerted by the wind on the specially processed wire. Therefore, irregular tension due to the environmental factors described above is applied to the transmission-processed wire in addition to the fixed tension due to the self-load.

As a result, there is a problem that the transmission tower is subjected to a tensile force acting on the transmission work line and the life of the transmission tower and the transmission tower is shortened due to irregular force applied for a long period of time.

In order to solve this problem, a device for relieving the irregular tension acting on the transmission work line is installed and fixed to the transmission tower, thereby preventing the transmission work line from being broken by the tension and extending the service life of the transmission tower And Korean Patent Registration No. 10-0809063 (Feb. 25, 2008, hereinafter referred to as "Patent Document 1") is given as an example.

Patent Document 1 discloses a tension control system for a transmission tower of a transmission transmission line capable of quickly regulating the tension of the transmission-use electric wire by using the expansion force of gas, A mitigating device is disclosed.

However, since the gas used for controlling the tension is minutely drained out over a long period of time and the pressure is lowered, cyclic charging is required. However, since the transmission tower is installed in a place where accessibility is not easy, There is a drawback in that it takes a lot of time and cost to maintain and repair.

Therefore, it is necessary to provide a durability and a method of saving resources required for maintenance and repair, while being able to quickly respond to a change in irregular tension applied to the transmission wire.

Korean Patent Registration No. 10-0809063, entitled "Tension Relief Device for Power Transmission Tower of Transmission Line", Registered Date: February 25, 2008)

Embodiments of the present invention are intended to extend the service life of transmission towers and transmission cables.

The embodiment of the present invention is intended to prevent an accident caused by breakage of the transmission-dedicated wire.

In addition, embodiments of the present invention are intended to save resources required for maintenance and repair of power transmission towers and transmission cables.

According to one aspect of the present invention, there is provided a tension relieving apparatus for a transmission tower of a transmission dedicated electric wire for regulating a tension applied to a transmission-dedicated working wire, the apparatus comprising: a container-shaped cover coupled to an arm of a transmission tower, A tension adjusting unit installed in the housing and adjusting a length of a wire to which the other end is connected to an end of the transmission working cable; A pair of angle sensing portions arranged in a shape penetrating through the wires to sense a sagging direction and deflection of the wires, and a pair of angle sensing portions that receive signals emitted from the angle sensing portions and the tension adjusting portion, And a control unit for controlling the tension of the transmission tower of the transmission tower.

The tension adjusting unit includes a drive motor that is driven by a drive shaft having a right screw thread formed on one side thereof and a left shaft screw protruded on the other side and is fixed to an upper surface of the base frame and rotates the drive shaft in one direction or another direction, A pair of worm gears each of which is rotatably supported on the upper side of the base frame and engaged with the right screw thread and the left knuckle mountain respectively and a drive disk having one side connected to the other side of the pair of worm gears, A pair of torque limiters each having a driven disc connected to one side of the driven disc to block transmission of the rotational force when a rotational force greater than a predetermined value is applied to the other side of the driven disc; One side of the base frame is wound on the other side, And a pair of angle sensors respectively installed on the upper side of the base frame and connected to the drum shafts and sensing a degree of rotation of the drum shaft, And a pair of torque sensors respectively installed on the drum shaft and sensing the magnitude of the rotational force acting on the drum shaft.

The angle sensing unit may include a flange portion coupled to an edge portion of the through hole formed at both sides of the cover so as to protrude from the both sides of the cover and a flange portion having one side connected to the flange portion and reduced in diameter toward the other side, A support spring having one end connected to the other end of the cone portion and having a shape wound around an outer circumferential surface of the wire and having a diameter reduced toward the other end; And four elongation sensors installed at 90-degree intervals on the other surface of the cone-shaped portion.

The control unit includes a control circuit for receiving signals from the angle sensor, the torque sensor, and the elongation sensor and regulating the operation of the drive motor, a battery for supplying power to the control circuit, And a communication module for transmitting a signal generated by the control circuit.

According to the embodiment of the present invention, the length of the transmission-dedicated working wire is adjusted in accordance with the external force applied to the transmission-dedicated working wire, so that the tension applied to the transmission working wire is controlled, The life span can be prolonged.

According to the embodiment of the present invention, when a tension greater than a predetermined value is applied to a transmission-dedicated working line, the length of the transmission-dedicated working line is extended by a torque limiter, Can be prevented.

In addition, according to the embodiment of the present invention, when an excessive tension is applied to the transmission-dedicated wire, an emergency signal is generated, so that resources required for maintenance and repair of the transmission tower and the transmission-dedicated wire can be saved.

1 is a view showing a state where a tension relieving device for a transmission tower of a transmission dedicated electric wire according to an embodiment of the present invention is installed on an arm of a transmission tower;
2 is a view showing a housing and a tension adjusting part included in a tension reducing device for a power transmission pylon of a transmission dedicated wire according to an embodiment of the present invention;
Fig. 3 is an exploded perspective view for explaining the tension adjusting unit shown in Fig.
FIG. 4 is a view for explaining the angle sensing unit shown in FIG. 1;
5 and 6 are views for explaining the operation of the tension relieving device for a transmission tower of a transmission work line according to an embodiment of the present invention
And
7 is a schematic diagram for explaining a control part included in a tension relieving device for a transmission tower of a transmission dedicated wire according to an embodiment of the present invention.

The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated and described in the drawings. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a view showing a state where a tension relieving apparatus 1 for a transmission tower of a transmission dedicated wire according to an embodiment of the present invention is installed on an arm 910 of a transmission tower.

Referring to Fig. 1, the embodiment 1 is fixed to an arm 910 provided in a power transmission pylon (not shown), and the other side of a pair of wires 36, 36a is fixed to both sides of the arm 910, Respectively.

The end portions of the transmission dedicated electric wires 920 and 921 are connected to the other ends of the wires 36 and 36a. Insulators 930 and 931 are provided between the wires 36 and 36a and the transmission dedicated electric wires 920 and 921, Are electrically insulated from each other.

Connection lines 940 and 941 are respectively provided in the transmission dedicated wires 920 and 921 and both ends of the jump line 950 are coupled to the connection ports 940 and 941, respectively.

Here, the jump line 950 is electrically connected so that a current can flow between the separate transmission lines 920 and 921. Since the jump line 950 may flow due to wind or the like and possibly contact the housing 10 or the arm 910, which will be described below, it should be used with a covering material capable of insulating high-voltage current.

FIG. 2 shows a housing 10 and a tension adjusting unit 30 included in a tension reducing apparatus 1 for a transmission tower of a transmission working cable according to an embodiment of the present invention. 1 and Fig. 2 together. Fig.

Referring to FIGS. 1 and 2, the present embodiment 1 includes a housing 10, an angle sensing unit 20, a tension adjusting unit 30, and a controller 40.

The housing 10 is provided with a container-shaped cover 12 coupled to the arm 910 and opened at the lower side and a base frame 11 coupled to the cover 12 in such a shape as to cover the opened lower side of the cover 12 .

The base frame 11 and the cover 12 are made of a material having high strength and stiffness. The base frame 11 and the cover 12 can be made of a metal such as steel, stainless steel or aluminum in which a corrosion-resistant film is formed, It can also be made of engineering plastics.

This is because the housing 10 is used in a state where it is installed in the outdoors for a long period of time, and therefore has high durability against daylight, temperature change, moisture and the like.

A fixing part 121 is formed on the cover 12 so as to be coupled to the arm 910. A fastening hole 122 is formed in the fixing part 121 and is fastened by a fastening member 911 The arm 910 and the fixing portion 121 can be firmly coupled.

Fig. 3 is an exploded perspective view for explaining the tension adjusting unit 30 shown in Fig. 2 and Fig. 3 together. Fig.

2 and 3, the tension adjusting unit 30 includes a drive motor 31, worm gears 32 and 32a, torque limiters 33 and 33a, drums 34 and 34a, and angle sensors 35 and 35a ) And a torque sensor.

The drive motors 31 are provided with drive shafts 311 and 311a protruding on both sides. A right screw thread 312 is formed on the outer circumferential surface of the drive shaft 311 protruding to one side of the drive motor 31 and a left screw thread 312a is formed on the outer circumferential surface of the drive shaft 311a protruding to the other side.

The drive motor 31 may rotate the drive shafts 311 and 311a in one direction or another direction or maintain the stopped state.

The drive motor 31 is fixed to the upper surface of the base frame 11. At this time, a plurality of support brackets 111, 112, 113, 114, 111a, 112a, 113a and 114a protrude from the upper surface of the base frame 31 as shown in FIG.

Both ends of the drive shaft 311 are rotatably supported by a pair of support brackets 111 and 112 and both ends of the drive shaft 311a are rotatably supported by the other pair of support brackets 111a and 112a .

A worm shaft 321 protrudes from one side of the worm gear 32.

The worm shaft 321 is rotatably supported on the support bracket 113 as shown in the figure. That is, the worm gears 32 are rotatably supported on the upper side of the base frame 11, respectively. At this time, the worm gear 32 is arranged to be engaged with the right screw thread 312.

The torque limiter 33 includes a driving disc 331 and a driven disc 332. [ One side of the driving disc 331 is coupled to the other side of the worm gear 32 and one side of the driven disc 332 is coupled to the other side of the driving disc 331.

Here, the torque limiter 33 is an electric limiter designed to slip or fall off a joint that transmits a rotational force when a load equal to or greater than a predetermined value is applied.

Therefore, when a rotational force greater than a predetermined value is applied between the drive disc 331 and the driven disc 332, the transmission of the rotational force is interrupted by the drive disc 331 and the driven disc 332 being idle or the like. Since the torque limiter 33 is a well-known mechanical element, its detailed structure and operation will not be described.

One side of the drum 34 is coupled to the other side of the driven disk 332 and a drum shaft 341 is formed on the other side of the drum 34. The drum shaft 341 is rotatably supported by the support bracket 114. That is, the drum 34 is rotatably supported on the upper side of the base frame 11.

One end of the wire 36 is wound around the outer circumferential surface of the drum 34 and the other end of the wire 36 is connected to the end of the transmission work wire 920 by the insulator 930 as described with reference to Fig. do.

The angle sensor 35 is installed in the support bracket 114. That is, on the upper side of the base frame 11. The angle sensor 35 is connected to the end of the drum shaft 341 to sense the degree to which the drum shaft 341 is rotated.

A torque sensor is mounted on the drum shaft 341 to sense the magnitude of the rotational force acting on the drum shaft 341, although it is not shown in detail. Although not shown in the drawings, a method of calculating the rotational force acting on the drum shaft 341 using the resistance change of the strain gauge attached to the outer peripheral surface of the drum shaft 341 may be applied to the torque sensor .

The torque sensor itself is also a well-known mechanical element, so its description is omitted.

As shown in the figure, the drive discs 311a, 311a, 313a, 313a, 313a, 313a, 313a, 313a, The connecting relationship between the supporting brackets 111, 112, and 113 is not limited to the connection relationship between the supporting brackets 331a and 332a, the drum 34a, the drum shaft 341a, the angle sensor 35a, the wire 36a, The drive disc 331 and the driven disc 332 included in the drive shaft 311, the right thread 312, the worm gear 32, the worm shaft 321, the torque limiter 33, the drum 34, The drum shaft 341, the angle sensor 35, the wire 36 and the insulator 930 and the arm 910, the description will be omitted.

In addition, a torque sensor (not shown) similar to the drum shaft 341 is also provided on the drum shaft 341a.

A through hole 123 and a fastening hole 124 are formed in the cover 12, which will be described below together with the respective guide portions 20.

Fig. 4 is a view for explaining each of the on-screen guiding portions 20 shown in Fig. 1 and 4 together.

Referring to FIGS. 1 and 4, on both sides of the housing 10, a respective sheet guide portion 20 (the other side is not shown) is attached or installed.

Each of the guide portions 21 includes a support cone 21, a support spring 215 and four elongation sensors 22 and 23, the rest being not shown. The support cone 21 has a flange portion 211, And cone-shaped portion 214 are formed.

The support cone 21 has a truncated cone shape whose diameter decreases from one side to the other and a flange portion 211 is formed at one side of the support cone 21. The support cone (21) is formed with a hollow portion, and the hollow portion is penetrated by the wire (36).

The flange portion 211 has a shape in which the diameter of the edge portion of the support cone 21 is expanded and a plurality of fastening holes 212 are formed in the flange portion 211.

On the other hand, through holes 123 are formed on both sides of the cover 12, and the other side of the wire 36 penetrates the through hole 123 and protrudes to the outside of the cover 12. A plurality of fastening holes (124) are formed in the periphery of the through hole (123).

The fastening hole 212 formed in the flange portion 211 is formed at a position and number corresponding to the fastening hole 124 of the cover 12 and the fastening member 213 passes through the fastening hole 212, 124 so that one side of the support cone 21 can be fastened to the cover 12.

One side of the support spring 215 is connected to the other end of the cone-shaped portion 214. The support spring 215 has a shape wound around the outer circumferential surface of the wire 36. Therefore, the support spring 215 prevents the wire 36 from being suddenly bent when the wire 36 moves in the direction other than the longitudinal direction.

Particularly, the diameter of the element wire forming the support spring 215 decreases from one side to the other side. Therefore, the outer diameter of the support spring 215 is gradually reduced from one side to the other side.

This is to make the supporting force by the support spring 215 gradually decrease toward the other end when the wire 36 is supported by the support spring 215 according to the behavior of the wire 36 as described above.

Due to the characteristics of the support spring 215, the boundary portion between the portion supported by the support spring 215 of the wire 36 and the portion not supported by the support spring 215 is abruptly bent, so that concentration of stress can be prevented.

Four expansion sensing sensors 22 and 23 (two not shown) are installed at the other surface of the cone 214 at 90 degree intervals. A strain gauge can be used as the elasticity sensor 22 or 23 and the elasticity sensor 22 or 23 can detect the elasticity of the wire 24 when the wire 36 moves in the direction other than the longitudinal direction, By measuring and combining the degree of expansion and contraction of the portion, it is possible to calculate the direction and degree of the behavior of the wire 36.

The control unit (40 in Fig. 2) will be described with reference to Fig.

7 is a schematic diagram for explaining a control unit 40 included in a tension relieving apparatus 1 for a transmission tower of a transmission dedicated wire according to an embodiment of the present invention.

The control unit 40 includes a control circuit 41, a battery 42, a solar cell 43, and a communication module 44.

The control circuit 41 is electrically connected to the drive motor 31, the elongation / contraction detection sensors 22 and 23, the angle sensor 35, the battery 42 and the communication module 44, The solar cell 43 is connected.

Therefore, the control circuit 41 receives electric power from the battery 42 and is supplied with electric power from the electric motor 40 via the angle sensor 35, 35a, the torque sensor installed on the drum shafts 341, 341a and four expansion sensors 22, (Not shown), respectively.

Then, the control circuit 41 controls the operation of the drive motor 31. That is, the driving motor 31 is kept stopped by the control circuit 41 or the driving shafts 311 and 311a are rotated to one side or the other side.

The solar cell 43 may be disposed on the upper surface of the cover 12 as shown in Fig. The solar cell 43 may be additionally provided in other parts of the transmission tower other than the arm 910 so as to produce more electric power.

Alternatively, the solar cell 43 may be replaced by other means for obtaining energy according to the environment of the place where the power transmission tower is installed. For example, when the power transmission tower is installed in a place where the amount of sunshine is insufficient but the wind amount is large, the solar cell 43 may be replaced with a small wind turbine, or a solar cell 43 and a wind turbine may be used together.

The battery 42 may be a secondary battery that stores power supplied from the solar cell 43 and can supply power to the control circuit 41. [ Alternatively, when a household or commercial power line is disposed in a nearby area where a power transmission tower is installed instead of the battery 42, they may be used as a power source.

The communication module 44 is a means for transmitting a signal to an operator monitoring the power supply status through the transmission dedicated electric wires 920 and 921. The communication module 44 is connected to the control circuit 41 in accordance with conditions pre- Various information can be provided.

Particularly, when an abnormality occurs in the embodiment (1) or the transmission dedicated electric wires 920 and 930, the kind and position of the abnormal state are transmitted to the worker through the communication module 44 so that the worker can quickly cope .

Figs. 5 and 6 are views for explaining the operation of the tension relieving apparatus 1 for a transmission tower of a transmission work line according to an embodiment of the present invention.

Referring first to Fig. 5, the tension exerted on the transfer dedicated working wire 920 is transferred to the wire 36. Fig. The tension f transmitted to the wire 36 is transmitted to the torque limiter 33 by acting on the rotational axis of the drum shaft 341.

When the magnitude of the rotational force formed by the tension f is smaller than a predetermined value in the torque limiter 33 described above, the rotational force is transmitted to the worm axis 321. [

That is, since the magnitude of the rotational force acting between the drive disc 331 and the driven disc 332 of the torque limiter 33 is smaller than a predetermined value, the rotational force applied to the driven disc 332 is transmitted to the drive disc 331 Or conversely, the rotational force exerted on the drive disc 331 may be transmitted to the follower disc 332.

In this case, the drum 34 is also rotated in the same direction W1 in accordance with the rotational direction M1 of the drive motor 31. [

Therefore, when the length of the transmission-dedicated cable 920 is contracted due to seasonal conditions such as folding into the winter season during the summer season or a sudden drop in temperature due to a large day-to-day variation, An additional tension is applied in addition to the tension, and the tension f applied to the wire 36 is gradually increased.

At this time, the degree of sagging of the wire 36 is gradually reduced by the four expansion / contraction sensors 22, 23 installed on each of the guide portions 20, and the sagging direction is detected as being upward in the downward direction.

When the control circuit 41 receives signals from the expansion / contraction sensors 22 and 23, the control circuit 41 causes the drive motor 31 to operate in accordance with information (program) previously input. The drive motor 31 causes the other side of the wire 36 to be rotated in the direction of unwinding from the drum 34 so that the end of the wire 36 The length is increased.

As the length of the wire 36 is increased, the tension applied to the transmission dedicated electric wire 920 gradually decreases and the magnitude of the tension f applied to the wire 36 also decreases. Therefore, The degree of sagging is increased and the sagging direction is directed upward from the upward direction.

The control circuit 41 operates the drive motor 31 until a degree of deflection of the wire 36 and a sagging direction are reached through a signal received from the elasticity sensor 22 or 23 , And when the range is reached, the operation of the drive motor 31 is stopped.

For reference, the pre-input range referred to here means the appropriate degree of deflection (isotope) of the transmission dedicated electric wire 920.

On the contrary, when the season enters the summer from the winter season or the temperature rises sharply, the length of the transmission dedicated electric wire 920 is extended. Accordingly, the tensile force acting on the transmission dedicated electric wire 920 is reduced, and the sagging degree is increased in each of the sheet guide portions 20 and the sagging direction is directed from the upper direction to the lower direction.

The control circuit 41 judges that the wire 36 is in a state in which the wire 36 is in contact with the wire 36. [ So that the driving motor 31 is rotated in the direction in which the length thereof is shortened by being wound around the drum 34.

In this process, the degree of sagging is reduced and the sagging direction is directed upward from the downward direction. In the control circuit 41, until the sagging degree and the sagging direction reach a predetermined range, 31) is operated, and when the above range is reached, the operation is stopped.

On the other hand, when an external force is applied to the transmission dedicated electric wire 920 by a typhoon or a local gust, the tension f applied to the wire 36 is increased.

At this time, the degree of sagging is increased in each of the guide portions 20, and it is sensed that the sagging direction includes a lateral component that is not a vertical direction.

In this case, the control circuit 41 controls the operation and stoppage of the drive motor 31 so that the sagging degree sensed by each sheet guide portion 20 is maintained within a predetermined range, The tension f can be maintained within the predetermined range.

6 illustrates an operation in the case where an external force applied to the transmission-dedicated working wire 920 is very large due to a typhoon or a local blast or the like.

6, when a very large external force is applied to the transmission dedicated electric wire 920 and the rotational force due to the tension F transmitted to the wire 36 is greater than a predetermined value in the torque limiter 33, The transmission of the rotational force between the driven disc 331 and the driven disc 332 is interrupted.

Therefore, even if the worm wheel 32 is rotated in the direction M2 in which the drive motor 31 is stopped or the wire 36 is wound, the rotational force of the drive motor 31 is transmitted from the drive disc 331 to the driven disc 332 It is not delivered. That is, regardless of the rotation of the drive disc 331, the driven disc 332 is rotated in the direction in which the wire 36 is unwound from the drum 34, thereby releasing the wire 36 from the drum 34, do.

When the length of the wire 36 is extended, a large tension applied to the transmission-dedicated wire 920 is reduced, so that a situation such as breakage of the transmission-dedicated wire 920 can be prevented, The force is also mitigated, which reduces the likelihood that the arm 910 and the transmission tower will experience deformation or fatigue failure.

However, when the length of the wire 36 is excessively extended, an accident may occur due to contact with a nearby object. Therefore, when the drum 34 is rotated by the angle sensor 35, If the rotated angle becomes excessively large, the control circuit 41 can issue a warning signal to the worker to interrupt the transmission through the transmission-dedicated working cable 920.

On the other hand, as the drum 34 is rotated within the allowable range and the length of the wire 36 is extended, the tension applied to the transmission dedicated electric wire 920 can be reduced. Therefore, the rotational force transmitted through the torque limiter 33 It can also be gradually reduced.

If the tension F applied to the wire 36 becomes smaller than a predetermined range because the external force applied to the transmission-dedicated wire 920 is reduced or eliminated, the control circuit 41 receives The wire 36 is again wound around the drum 34 so that the tension applied to the transfer work wire 920 can be reached within an appropriate range.

The maximum value at which the torque limiter 33 can transmit the rotational force, that is, a predetermined value is set to be smaller than the elastic limit of the wire 36 or the transmission-dedicated electric wire 92, It is possible to prevent the transmission-dedicated electric wire 920 from being broken or the permanent deformation exceeding the elastic limit even when a large external force is applied.

As described above, in the present embodiment (1), the tension adjusting unit 30 adjusts the length of the wires 36, 36a so that the tension applied to the transmission work wire 920 is adjusted.

5, the speed at which the wire 63 is pulled out of the drum 34 by the respective guide portions 20 is in the range of the driving force F It can be determined that the drum 34 is not rotated normally by the drive motor 131 and the wire 36 is excessively loosened as compared with the rotation by the motor 13. [

At this time, the control circuit 41 issues an emergency signal to the operator through the communication module 44 in accordance with the previously input information (program), and when the operator receives the signal, 920 may be interrupted.

It can be determined that the drum shaft 341 is not smoothly rotated with respect to the support bracket 114 when a torque measured by a torque sensor built in the drum shaft 341 is measured to some extent.

At this time, in accordance with information (program) previously input, the control circuit 41 sends a signal to the operator via the communication module 44 notifying that the transmission tensioning device 1 of the transmission tower is not normally operated .

The above description exemplifies the operation of the embodiment (1), and the manner in which it is operated can be changed in accordance with the information (program) previously input to the control circuit 41. [ That is, the information input to the control circuit 41 can be appropriately changed in accordance with the conditions such as the temperature change and the maximum wind speed in the area where the transmission tower is installed.

As described above, in addition to the basic effect of extending the service life of the power transmission towers and the transmission dedicated wires 920 and 921, the tension relieving device 1 for the transmission tower of the transmission towers according to the embodiment of the present invention, It is possible to prevent breakage of the transmission dedicated electric wire 920 and breakage of the arm 910 of the power transmission tower and to save resources required for maintenance and repair thereof.

While the present invention has been described with respect to the preferred embodiments, it is to be understood that the subject matter of the invention is not limited to the disclosed embodiments and that those skilled in the art, Other embodiments may easily be suggested by adding, changing, deleting, adding, or the like of the components within the scope of the same ideology, but this also falls within the scope of the present invention.

1: Tension relieving device for transmission tower of transmission wire
10: housing 11: base frame 12: cover
121: fixing portion 123: through hole 20:
21: support cone 211: flange portion 214: sleeve portion
215: support spring 22, 23: stretch detection sensor 30:
31: drive motor 311: drive shaft 312:
32: Worm gear 321: Worm shaft 33: Torque limiter
331: driving disc 332: driven disc 34: drum
341: drum shaft 35: angle sensor 36: wire
40: control unit 41: control circuit 42: battery
43: solar cell 44: communication module 910: arm
920, 921: machining wire 930: insulator 940, 941:
950: jump line

Claims (1)

As a tension relieving device for a transmission tower of a transmission dedicated electric wire for regulating the tension applied to the transmission dedicated electric wires 920 and 921,
A housing 10 having a container-shaped cover 12 coupled to an arm 910 of a transmission tower and opening downward, and a base frame 11 coupled to an open lower side of the cover 12;
A tension adjusting unit 30 installed in the housing 10 for adjusting the length of the wires 36 and 36a connected to the ends of the transmission working wires 920 and 921 at the other ends;
A pair of angle sensing portions (not shown) disposed on both sides of the housing 10 and disposed in a shape penetrating through the wires 36 and 36a to sense a deflection direction and deflection of the wires 36 and 36a, 20); And
A control unit (40) for receiving signals emitted from each of the guide members (20) and the tension adjusting unit (30) and adjusting the operation of the tension adjusting unit (30); Lt; / RTI >
The tension adjusting unit 30
A drive shaft 311 formed with a right screw thread 312 protrudes on one side and a drive shaft 311a formed with a left screw mount 312a on the other side and fixed to the upper surface of the base frame 11, 311a in one direction or another direction,
Worm shafts 321 and 321a protruding from one side of the base frame 11 are rotatably supported on the upper side of the base frame 11 and a pair of worm gears 312a and 312b, 32, and 32a,
When the driving discs 331 and 331a to which one side is coupled to the other side of the pair of worm gears 32 and 32a and the rotational force greater than a predetermined value are applied to the other side of the driving discs 331 and 331a, A pair of torque limiters (33, 33a) having driven disks (332, 332a), one side of which is connected to be disconnected,
One side of each of the driven discs 332 and 332a is coupled to one side of the driven discs 332 and 332a and one side of the wires 36 and 36a is wound on the outer peripheral surface of the driven discs 332 and 332a. A pair of drums 34 and 34a protruding from the drum 341 and 341a,
A pair of angle sensors 35 and 35a installed on the upper side of the base frame 11 and connected to the drum shafts 341 and 341a for detecting the degree of rotation of the drum shafts 341 and 341a, Wow,
And a pair of torque sensors respectively installed on the drum shafts 341 and 341a and sensing a magnitude of a rotational force acting on the drum shafts 341 and 341a,
Each of the guide portions 20
A flange portion 211 coupled to an edge portion of the through hole 123 formed on both sides of the cover 12 so as to project the wires 36 and 36a to both sides of the cover 12,
A cone-shaped portion 214 having a shape of a truncated cone having one side connected to the flange portion 211 and decreasing in diameter toward the other side and having a shape penetrated by the wires 36 and 36a,
A supporting spring having one end connected to the other end of the cone portion 214 and having a shape wound around the outer circumferential surface of the wires 36 and 36a and having a diameter reduced toward the other side, (215)
And four elongation sensors 22 and 23 installed on the other side surface of the cone portion 214 at intervals of 90 degrees to measure the extent of expansion and contraction of the four portions according to the deformation of the cone portion 214,
The control unit (40)
A control circuit 41 for receiving signals from the angle sensors 35 and 35a, the torque sensor and the elongation sensors 22 and 23 and adjusting the operation of the drive motor 31,
A battery 42 for supplying power to the control circuit 41,
A solar cell 43 installed on the upper surface of the cover 12 to charge the battery 42,
And a communication module (44) for transmitting a signal issued by the control circuit (41). A tension relieving device (1) for a transmission tower of a transmission working electric wire.

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