Overhead Line Fixing Equipment

Abstract

The present invention relates to a bird-prevention type overhead power distribution line fixing device using a crossarm, and The device includes a crossarm (10), an insulator mechanism (20), a cut-out switch mechanism (30), a transformer (40), an abnormality indicator mechanism (50), a receiving cap (60), a first valve (70), a replenishment tank (80), a bird repellent mechanism (90), a motion detection sensor (100), a vibration detection sensor (110), and a control unit (120), thereby having the effect of blocking birds from approaching and efficiently notifying of abnormalities in the transformer.

Description

Technology Field

[0001] The present invention relates to a bird-prevention type power distribution line fixing device using a crossarm. Background Technology

[0002] Overhead power distribution equipment consists of overhead distribution lines, clamps, clamp covers, and numerous insulators, and is installed on utility poles.

[0003] Meanwhile, conventionally, it was impossible to block birds when they approached overhead power distribution facilities, resulting in severe damage caused by the birds.

[0004] In addition, transformers are installed on utility poles; however, conventionally, when a transformer malfunction occurred, it was not possible to effectively notify the surrounding area, making it difficult to respond to such issues. Prior art literature

[0005] Republic of Korea Registered Patent Publication No. 10-2406749 The problem to be solved

[0006] The present invention was developed to solve the above-mentioned problems, and aims to solve the problem of providing a fixing device for an overhead power distribution line that blocks bird access and can efficiently notify of abnormalities in a transformer. means of solving the problem

[0007] The present invention for solving the above-mentioned problems is,

[0008] A crossbar (10) installed on a utility pole (P);

[0009] An insulator mechanism (20) installed on a crossarm (10) and on which an overhead power line (L) is installed;

[0010] A cutout switch mechanism (30) installed on a utility pole (P) and connected to a first branch line (B1) branched from an overhead power line (L);

[0011] A transformer body (41) that is installed on a utility pole (P) and contains insulating oil inside; a support member (42) that is provided to protrude downward from the lower circumference of the transformer body (41); and an outlet (43) that is formed to protrude downward from the lower center of the transformer body (41), the interior of which communicates with the interior of the transformer body (41), and the lower surface of which is located above the lower surface of the support member (42); and a transformer (40) to which a second branch line (B2) from a cutout switch mechanism (30) is connected;

[0012] A connecting body (51a); a first connecting part (51b) provided on the upper part of the connecting body (51a) and detachably threaded to the discharge port (43) of the transformer (40) and communicating with the discharge port (43); a connecting pipe (51) having a second connecting part (51c) provided on the lower part of the connecting body (51a) through which insulating oil from the discharge port (43) moves; An abnormal indicator mechanism (50) having a distribution space (52a) into which insulating oil from a second fastening part (51c) flows, a plurality of branch discharge holes (52b) branched from the distribution space (52a) to discharge insulating oil from the distribution space (52a) to the outside, and an inclined surface (52c) through which insulating oil discharged from the branch discharge holes (52b) flows, wherein the lower part of the second fastening part (51c) is detachably threaded to the distribution space (52a) and forms a truncated cone shape that narrows as it goes downward; a fixed body (53) installed in the distribution space (52a); a colored body (54) made of a material that dissolves in insulating oil and is detachably inserted into the fixed body (53); and a fastening body (55) provided to protrude downward from the lower surface of the indicator body (52);

[0013] A receiving cap (60) having a size smaller than the abnormal indicator mechanism (50), comprising: a receiving bar (61) that is detachably threaded and fastened to a fastening body (55) of the abnormal indicator mechanism (50); a receiving portion (62) having a truncated cone shape that is connected to the lower end of the receiving bar (61) and has a width that narrows as it goes downward, and having a shape with an open top to receive insulating liquid from the indicator slope surface (52c); and a receiving cap (60) having a size smaller than the abnormal indicator mechanism (50).

[0014] An electronic type first valve (70) installed in the connecting pipe (51) to control the movement of insulating oil from the transformer body (41) to the distribution space (52a);

[0015] A supplementary tank (80) having: a supplementary tank body (81) that receives insulating oil and is installed in a transformer (40) to supply insulating oil to a transformer body (41); and an electronic type second valve (82) installed in the supplementary tank body (81) to control the movement of insulating oil from the supplementary tank body (81) to the transformer body (41); and

[0016] A bird repellent device (90) having a screw (91a) rotatably installed inside a crossarm (10), a movable body (91b) connected to the screw (91a) by a screw thread and moving according to the rotation of the screw (91a), and a driving motor (91c) that rotates the screw (91a), so that the movable body (91b) moves in the forward and backward directions according to the operation of the driving motor (91c); a contact bar (92) installed on the movable body (91b); and a sound generating plate (93) installed on the inner upper surface of the crossarm (10), having an uneven surface (93a) to which the contact bar (92) contacts;

[0017] A motion detection sensor (100) installed on the crossarm (10) and outputting a motion detection signal when it detects a moving object in the vicinity;

[0018] A vibration detection sensor (110) installed in the transformer (40) to detect vibration of the transformer (40) and output a vibration abnormality signal when the vibration of the transformer (40) deviates from a reference value;

[0019] A control unit (120) that operates a drive motor (91c) depending on whether a motion detection signal is received from a motion detection sensor (100), and controls the operation of a first valve (70) and a second valve (82) depending on whether a vibration abnormality signal is received from a vibration detection sensor (110).

[0020] It is characterized by including Effects of the invention

[0021] According to the present invention as described above, the invention includes a crossarm (10), an insulator mechanism (20), a cut-out switch mechanism (30), a transformer (40), an abnormality indicator mechanism (50), a receiving cap (60), a first valve (70), a replenishment tank (80), a bird repellent mechanism (90), a motion detection sensor (100), a vibration detection sensor (110), and a control unit (120), thereby having the effect of blocking birds from approaching and efficiently notifying of abnormalities in the transformer. Brief explanation of the drawing

[0022] FIG. 1 is an overall diagram for explaining the present invention, and FIG. 2 is a cross-sectional view illustrating the transformer, the fault indicator mechanism, and the receiving cap portion of the present invention, and FIG. 3 is a drawing showing a part of FIG. 2, and FIGS. 4 and FIGS. 5 are drawings showing a part of FIGS. 3, and FIG. 6 is a perspective view for explaining the abnormality indicator mechanism of the present invention, and FIG. 7 is a side cross-sectional view illustrating the reinforcing bar and bird repellent device of the present invention, and FIG. 8 is an electrical configuration diagram for explaining the connection between the components of the present invention, and FIGS. 9 and FIGS. 10 are diagrams illustrating the operation of the present invention. Specific details for implementing the invention

[0023] The present invention is described below so that a person skilled in the art can easily implement it.

[0025] FIG. 1 is an overall view for explaining the present invention, FIG. 2 is a cross-sectional view for explaining the transformer, the fault indicator mechanism, and the housing cap portion of the present invention, FIG. 3 is a drawing showing a part of FIG. 2, FIG. 4 and FIG. 5 are drawings showing a part of FIG. 3, FIG. 6 is a perspective view for explaining the fault indicator mechanism of the present invention, FIG. 7 is a side cross-sectional view for explaining the arm and bird repellent mechanism of the present invention, and FIG. 8 is an electrical configuration diagram for explaining the connection between the components of the present invention. The configuration of the present invention is described as follows with reference to FIG. 1 to FIG. 8. Meanwhile, in this embodiment, the directionality of the configuration of this embodiment is explained using the XYZ coordinates in FIG. 2 and FIG. 7, wherein the X-axis direction in FIG. 2 and FIG. 7 is defined as the left-right direction, the Y-axis direction in FIG. 2 and FIG. 7 is defined as the front-back direction, and the Z-axis direction in FIG. 2 and FIG. 7 is defined as the up-down direction. In addition, the direction of each component in this embodiment is merely an example, and the direction of each component may be interpreted differently depending on how the standard is set.

[0027] A bird-prevention type processing distribution line fixing device using a crossarm according to the present invention comprises a crossarm (10), an insulator mechanism (20), a cut-out switch mechanism (30), a transformer (40), an abnormality indicator mechanism (50), a receiving cap (60), a first valve (70), a replenishment tank (80), a bird repellent mechanism (90), a motion detection sensor (100), a vibration detection sensor (110), and a control unit (120).

[0028] The above-mentioned crossarm (10) is installed on a utility pole (P) as shown in FIG. 1. In this embodiment, the crossarm (10) has a square tube shape with a space formed inside.

[0029] As shown in FIG. 1, the above insulator mechanism (20) is installed on a crossarm (10) to install an overhead power line (L). In this embodiment, the insulator mechanism (20) is made of a suspension insulator.

[0030] As shown in FIG. 1, the above cutout switch mechanism (30) is installed on a utility pole (P) and is connected to a first branch line (B1) branched from an overhead power distribution line (L). In this embodiment, the cutout switch mechanism (30) is equipped with a cutout switch, etc. and is installed on a utility pole (P). Meanwhile, in this embodiment, the first branch line (B1) is branched from the overhead power distribution line (L) via a branch sleeve (S).

[0031] As shown in FIGS. 1 and 2, the above transformer (40) is equipped with a transformer body (41), a support (42), and an outlet (43), and a second branch line (B2) from a cutout switch mechanism (30) is connected.

[0032] The above transformer body (41) is installed on a utility pole (P) with insulating oil contained inside. In this embodiment, a transformer equipment for operating the transformer is provided inside the transformer body (41). Meanwhile, in this embodiment, the transformer equipment is a transformer equipment applied to a conventional pole-mounted transformer.

[0033] The above support member (42) is provided to protrude downward from the lower circumference of the transformer body (41). In this embodiment, the support member (42) forms a circular ring shape.

[0034] The above-mentioned discharge port (43) is formed to protrude downward from the lower center of the transformer body (41), so that its interior communicates with the interior of the transformer body (41), and its lower surface is located above the lower surface of the support body (42). In this embodiment, the discharge port (43) has a circular tube shape and has screw threads formed on its outer surface.

[0035] The above abnormal indicator mechanism (50) is equipped with a connecting tube (51), an indicator (52), a fixed body (53), a color body (54), and a fastening body (55), as shown in FIGS. 1, 2, 3, 5, and 6.

[0036] The above connecting pipe (51) is equipped with a connecting body (51a), a first connecting part (51b), and a second connecting part (51c), and insulating oil from the discharge port (43) moves.

[0037] The above connecting body (51a) has a circular tube shape.

[0038] The first fastening part (51b) is provided on the upper part of the connecting body (51a) and is threaded to be detachably connected to the discharge port (43) of the transformer (40), and is in communication with the discharge port (43). In this embodiment, the first fastening part (51b) forms a circular tube shape and is in communication with the connecting body (51a), and threads are formed on its inner surface. Meanwhile, in this embodiment, a packing member (e.g., an O-ring) is provided between the first fastening part (51b) and the discharge port (43), so that the space between the first fastening part (51b) and the discharge port (43) is sealed.

[0039] The second fastening part (51c) is provided at the lower part of the connecting body (51a). In this embodiment, the second fastening part (51c) forms a circular tube shape and communicates with the connecting body (51a), and has screw threads formed on its outer surface.

[0040] The above-mentioned indicator (52) is equipped with a distribution space (52a), a branch discharge hole (52b), and an inclined indicator surface (52c), and the lower part of the second fastening part (51c) is detachably threaded to the distribution space (52a) and forms a truncated cone shape that narrows toward the bottom. In this embodiment, a packing member (e.g., an O-ring) is provided between the surface forming the distribution space (52a) and the second fastening part (51c) so that the space between the surface forming the distribution space (52a) and the second fastening part (51c) is sealed.

[0041] Insulating oil from the second fastening part (51c) flows into the distribution space (52a). In this embodiment, the distribution space (52a) is connected to the interior of the second fastening part (51c).

[0042] The above branch discharge hole (52b) branches out from the distribution space (52a) and discharges insulating oil from the distribution space (52a) to the outside. In this embodiment, a plurality of branch discharge holes (52b) are provided in a radial manner. Meanwhile, in this embodiment, the branch discharge hole (52b) is positioned at an angle as it goes downward, and the lower end is opened to the outside of the indicator body (52).

[0043] The insulating oil discharged from the branch discharge hole (52b) flows through the above-mentioned inclined surface (52c). In this embodiment, since the insulating oil has a certain viscosity, it can flow along the inclined surface (52c) when discharged from the branch discharge hole (52b).

[0044] The above fixed body (53) is installed in the distribution space (52a). In this embodiment, the fixed body (53) has a pointed shape at the top.

[0045] The above-mentioned color body (54) is made of a material that is removablely inserted into the fixed body (53) and dissolves in insulating oil. In this embodiment, the color body (54) may be any of the various forms of conventional color materials, such as solid oil-soluble solvent dyes.

[0046] The above fastening body (55) is provided to protrude downward from the lower surface of the indicator body (52). In this embodiment, screw threads are formed on the inner surface of the fastening body (55).

[0047] As shown in FIGS. 2 and 3, the above-mentioned receiving cap (60) has a fastening bar (61) and a receiving portion (62), and has a size smaller than that of the abnormal indicator mechanism (50).

[0048] The above fastening bar (61) is threaded so as to be detachably connected to the fastening body (55) of the abnormal indicator mechanism (50). In this embodiment, the fastening bar (61) is threaded so as to be detachably connected to the fastening body (55).

[0049] The receiving portion (62) has an open top shape to receive insulating liquid from the indicator slope surface (52c), is connected to the lower end of the fastening bar (61), and has a truncated cone shape that narrows toward the bottom. In this embodiment, the receiving portion (62) has an open top.

[0050] This receiving cap (60) stores insulating oil that continues to flow downward without falling to the ground while marking the transformer (40) or higher on the indicator (52). Additionally, the receiving cap (60) has a truncated cone shape and is smaller than the leakage indicator (30), so that when the indicator (52) is viewed from the ground, the indicator (52) is not obscured by the receiving cap (60).

[0051] As shown in FIGS. 3, 4, and 8, the first valve (70) is installed in the connecting pipe (51) to control the movement of insulating oil from the transformer body (41) to the distribution space (52a). In this embodiment, the first valve (70) is of the electronic type (e.g., a solenoid valve), is installed inside the connecting body (51a), and is operated by a control unit (120).

[0052] The above-mentioned replenishment tank (80) is installed in the transformer (40) having a replenishment tank body (81) and a second valve (82), as shown in FIGS. 1 and FIGS. 8.

[0053] The above supplementary tank body (81) contains insulating oil and is installed in the transformer (40) to supply insulating oil to the transformer body (41). In this embodiment, the supplementary tank body (81) is installed on the upper part of the transformer body (41) so as to be in communication with the transformer body (41), but its installation location can be varied in various ways as long as it can supply insulating oil to the transformer body (41).

[0054] As shown in FIG. 8, the second valve (82) is installed in the main body of the replenishment tank (81) to control the movement of insulating oil from the main body of the replenishment tank (81) to the main body of the transformer (41). In this embodiment, the second valve (82) is of the electronic type (e.g., a solenoid valve) and is installed in the main body of the replenishment tank (81), but its installation location can be varied in various ways as long as it can control the movement of insulating oil from the main body of the replenishment tank (81) to the main body of the transformer (41). The second valve (82) is operated by the control unit (120).

[0055] The bird repellent device (90) is installed inside the arm (10) and is equipped with a contact bar (91), a contact bar (92), and a sound generating plate (93), as shown in FIG. 7.

[0056] The above contact-movement device (91) is equipped with a screw (91a), a moving body (91b), and a driving motor (91c), and the moving body (91b) moves in the forward and backward directions according to the operation of the driving motor (91c).

[0057] The screw (91a) is rotatably installed inside the reinforcing bar (10). In this embodiment, it is arranged in the front-rear direction.

[0058] The above-mentioned movable body (91b) is thread-connected to the screw (91a) and moves according to the rotation of the screw (91a). In this embodiment, the screw (91a) is thread-connected while being inserted through the movable body (91b), so that the movable body (91b) moves by the rotation of the screw (91a). Meanwhile, in this embodiment, a guide member (91d) arranged in the front-rear direction is provided, and the movable body (91b) is inserted into the guide member (91d) so as to be movable.

[0059] The above drive motor (91c) rotates the screw (91a). In this embodiment, the drive motor (91c) is installed inside the reinforcing bar (10) and connected to the screw (91a). In this embodiment, the drive motor (91c) is controlled by the control unit (120).

[0060] Meanwhile, in this embodiment, the contact-movement device (91) moves the movable body (91b) using a ball screw method, but the method can be modified in various ways as long as the movable body (91b) can be moved.

[0061] The above contact bar (92) is installed on the movable body (91b). In this embodiment, the contact bar (92) is provided to protrude upward from the upper surface of the movable body (91b). Meanwhile, in this embodiment, the contact bar (92) may be made of a metal material having elasticity.

[0062] The sound generating plate (93) is installed on the inner upper surface of the reinforcing bar (10) by having an uneven portion (93a) to which the contact bar (92) contacts. In this embodiment, the sound generating plate (93) may be made of a metal material.

[0063] The motion detection sensor (100) is installed on the arm (10) as shown in FIG. 7 and outputs a motion detection signal when it detects a moving object in the vicinity. In this embodiment, the motion detection sensor (100) may be an ultrasonic sensor.

[0064] As shown in FIG. 2, the above vibration detection sensor (110) is installed in the transformer (40) to detect vibration of the transformer (40), and outputs a vibration abnormality signal when the vibration of the transformer (40) deviates from a reference value. In this embodiment, the vibration detection sensor (110) can be any ordinary sensor capable of detecting vibration.

[0065] The above control unit (120) operates the drive motor (91c) depending on whether it receives a motion detection signal from the motion detection sensor (100), and controls the operation of the first valve (70) and the second valve (82) depending on whether it receives a vibration abnormality signal from the vibration detection sensor (110). In this embodiment, when insulating oil is discharged from the transformer body (41), the control unit (120) controls the operation of the first valve (70) and the second valve (82) so that the amount of insulating oil inside the transformer body (41) is maintained at an appropriate level. In addition, the control unit (120) can electrically control each electrical component as shown in FIG. 8, and it is preferable to communicate wirelessly with each electrical component. Meanwhile, in this embodiment, the control unit (120) can be installed on the outer surface of the transformer body (41), and its installation location can be varied in various ways as long as it can perform a control function.

[0067] FIGS. 9 and FIGS. 10 are diagrams illustrating the operation of the present invention. With reference to FIGS. 9 and FIGS. 10, the operation of the present invention is described as follows.

[0068] When the present invention is installed as shown in Fig. 1, if a bird approaches the area around the crossarm (10), the motion detection sensor (100) detects the bird and outputs a motion detection signal.

[0069] At this time, when the control unit (120) receives a motion detection signal from the motion detection sensor (100), the control unit (120) operates the drive motor (91c) to rotate the screw (91a), thereby causing the moving body (91b) to move back and forth in the forward and backward directions as shown in FIG. 9.

[0070] Then, the contact bar (92) installed on the moving body (91b) comes into contact with the uneven part (93a) of the sound generating plate (93) and generates a friction sound, causing the friction sound (warning sound) to spread around the arm (10).

[0071] In this way, the present invention prevents birds from approaching the area around the arm (10) by causing the warning sound to spread around the arm (10).

[0072] Meanwhile, the transformer (40) malfunction notification process in the present invention is described as follows.

[0073] When vibration occurs in the transformer (40) due to a decrease in the performance of the insulating oil inside the transformer (40), damage to the transformer equipment inside the transformer (40), etc., the vibration detection sensor (110) detects this.

[0074] At this time, when the vibration of the transformer (40) exceeds a reference value, the vibration detection sensor (110) outputs a vibration abnormality signal to the control unit (120), and the control unit (120) opens the first valve (70) for a certain period of time.

[0075] Then, the insulating oil contained in the transformer body (41) passes through the inside of the connecting pipe (51) and moves to the distribution space (52a) of the indicator (52), and at this time, as the color element (54) dissolves in the insulating oil, the insulating oil having color (hereinafter referred to as colored insulating oil) is discharged to the indicator slope surface (52c) through the branch discharge hole (52b).

[0076] Afterwards, the colored insulating oil flows along the inclined surface (52c) as shown in Fig. 10, and the colored insulating oil that continues to move is received in the receiving cap (60).

[0077] In this way, when a color is displayed on the indicator slope (52c) through the colored insulating oil, the manager recognizes the need to inspect the transformer (40) through the color display on the indicator slope (52c).

[0078] Meanwhile, the control unit (120) can open the first valve (70) and simultaneously open the second valve (82) to maintain a certain amount of insulating oil inside the transformer body (41).

[0079] Additionally, the control unit (120) may open the second valve (82) after a certain amount of time has elapsed since opening the first valve (70).

[0081] The present invention, as described above, has the effect of preventing birds from approaching overhead power distribution facilities by generating a warning sound when birds approach.

[0082] In addition, the present invention has the effect of making it easy to identify the transformer (40) abnormality on the ground by indicating the transformer (40) abnormality through the insulating oil of the transformer (40), and by including color in the insulating oil and indicating it on a truncated cone-shaped indicator (52).

[0083] In addition, the present invention can prevent colored insulating oil from falling to the ground and causing damage to pedestrians on the ground, thereby having the effect of preventing complaints from pedestrians on the ground.

[0084] In addition, the present invention is configured so that the transformer body (41), the connecting pipe (51), and the indicator (52) are separated, thereby providing the effect of convenient installation and replacement of the color element (54).

[0085] In addition, the present invention has the effect of preventing damage to the discharge port (43) by ensuring that the lower surface of the discharge port (43) of the transformer (40) is positioned above the lower surface of the support body (42), so that when the transformer (40) is placed on the ground before installing the fault indicator mechanism (50) on the transformer (40), the discharge port (43) does not come into contact with the ground.

[0087] Meanwhile, in the sense that the present invention further includes various structures applicable to overhead power distribution, such as a structure for preventing bird access to a structure for installing (fixing) an overhead power distribution line, the title of the present invention is defined as "bird access prevention type overhead power distribution line fixing device using a crossarm," and the subject of the claim of the present invention is defined as "overhead power distribution line fixing device." Explanation of the symbols

[0088] 10: Wancheol 20: Insulator 30: Cutout switch mechanism 40: Transformer 50: Anomaly indicator 60: Receiving cap 70: 1st valve 80: Replenishment tank 90: Bird repellent 100: Motion sensor 110: Vibration detection sensor 120: Control unit

Claims

Claim 1 A crossarm (10) installed on a utility pole (P); an insulator mechanism (20) installed on the crossarm (10) to which an overhead power line (L) is installed; a cutout switch mechanism (30) installed on the utility pole (P) to which a first branch line (B1) branched from the overhead power line (L) is connected; a transformer body (41) installed on the utility pole (P) with insulating oil contained therein; a support body (42) provided to protrude downward from the lower circumference of the transformer body (41); and an outlet (43) formed to protrude downward from the lower center of the transformer body (41), the interior of which communicates with the interior of the transformer body (41), and the lower surface of which is located above the lower surface of the support body (42); a transformer (40) to which a second branch line (B2) from the cutout switch mechanism (30) is connected; and a connecting body (51a); A first fastening part (51b) provided on the upper part of the connecting body (51a) and detachably threaded to the discharge port (43) of the transformer (40), communicating with the discharge port (43); a connecting pipe (51) having a second fastening part (51c) provided on the lower part of the connecting body (51a) through which insulating oil from the discharge port (43) moves; a distribution space (52a) into which insulating oil from the second fastening part (51c) flows, a plurality of branch discharge holes (52b) branched from the distribution space (52a) through which insulating oil from the distribution space (52a) is discharged to the outside, and an inclined surface (52c) through which insulating oil discharged from the branch discharge holes (52b) flows, wherein the lower part of the second fastening part (51c) is detachably threaded to the distribution space (52a) and forms a truncated cone shape that narrows as it goes downward. An abnormal indicator mechanism (50) having: a fixed body (53) installed in a distribution space (52a); a colored body (54) made of a material that dissolves in insulating oil and is detachably inserted into the fixed body (53); and a fastening body (55) provided to protrude downward from the lower surface of the indicator body (52); a fastening bar (61) that is detachably threaded and fastened to the fastening body (55) of the abnormal indicator mechanism (50); and a receiving part (62) having a truncated cone shape that is connected to the lower end of the fastening bar (61) and becomes narrower as it goes downward, having an open top shape to receive insulating liquid from the indicator slope surface (52c).A receiving cap (60) having a size smaller than that of an abnormal indicator device (50) and installed in a connecting pipe (51) and an electronic type first valve (70) that controls the movement of insulating oil from the transformer body (41) to the distribution space (52a); and a supplementary tank body (81) that receives insulating oil and is installed in the transformer (40) to supply insulating oil to the transformer body (41); A replenishment tank (80) equipped with an electronic type second valve (82) installed in the replenishment tank body (81) to control the movement of insulating oil from the replenishment tank body (81) to the transformer body (41); a contact-movement device (91) equipped with a screw (91a) rotatably installed inside the reinforcing bar (10), a movable body (91b) connected to the screw (91a) by a screw thread and moving according to the rotation of the screw (91a), and a driving motor (91c) that rotates the screw (91a), wherein the movable body (91b) moves in the forward and backward directions according to the operation of the driving motor (91c); and a contact bar (92) installed on the movable body (91b). A bird repellent device (90) having a sound generating plate (93) installed on the inner upper surface of a cross arm (10) and having an uneven surface (93a) to which a contact bar (92) contacts; a motion detection sensor (100) installed on the cross arm (10) and outputting a motion detection signal when a surrounding moving object is detected; a vibration detection sensor (110) installed on a transformer (40) and detecting vibration of the transformer (40), and outputting a vibration abnormality signal when the vibration of the transformer (40) deviates from a reference value; and a control unit (120) that operates a drive motor (91c) depending on whether a motion detection signal is received from the motion detection sensor (100), and controls the operation of a first valve (70) and a second valve (82) depending on whether a vibration abnormality signal is received from the vibration detection sensor (110).

Images