KR102474623B1 - Terminal box apparatus for extra-high voltage distribution line - Google Patents

Abstract

The present invention relates to an extra-high voltage distribution terminal box apparatus, which comprises a terminal box fixing means, a moving means including a base plate, a front and rear moving plate, a platform, a front and rear moving mechanism, and a lifting and lowering driving mechanism, a holding means, and a fastening means to perform a fixing work of lifting a terminal box to a fixed position and fixing the same to a telephone pole, and an inspection work on the ground by lowering the terminal box to an inspection position, so as to fundamentally exclude various accidents caused by a high-place work. By providing a cord retractor, a control signal line has a margin as much as a lifting height of the terminal box and the margin is wound at the fixed position and released at the inspection position, such that a fault section automatic switch and a control device are always connected by the control signal line. By forming a bolt head connecting a lower fixture fixed to the telephone pole and a lower block fixed to the terminal box, and a bolt head groove of a bolt rotator in a circular shape, and by forming serrations on an outer circumference of the bolt head and an inner circumference of the bolt head groove, engagement between the bolt head and the bolt head groove is smoothly facilitated.

Description

Terminal box apparatus for extra-high voltage distribution line}

The present invention relates to an extra-high voltage distribution terminal box device among technologies in the distribution field, and more specifically, by raising the terminal box to a fixed position and fixing it to a telephone pole, and by lowering it to an inspection position to perform inspection work on the ground, work at height It is possible to fundamentally exclude various accidents caused by the control signal line, but the margin is wound at the fixed position and unwound at the inspection position, so that the automatic switchgear and control device for the faulty section are always operated by the control signal line. It relates to an extra-high voltage distribution terminal box device that enables connection and ensures smooth engagement between a bolt head fastening a lower fixture fixed to a telephone pole and a lower block fixed to a terminal box and a bolt head groove of a bolt rotation sphere.

In general, electricity generated in a power plant is boosted at a substation adjacent to the power plant and transmitted through an overhead transmission line insulated on a transmission tower to the vicinity of a large-scale consumer density area, and at the final substation it is stepped down to a special high voltage of 22.9kV to the main line. It distributes power to a large-scale customer density area through distribution lines, and supplies it to customers through branch distribution lines in the vicinity of customers.

As shown in FIG. 7, a conventional distribution line for distributing extra-high voltage includes a telephone pole 11 installed on the ground near a consumer; Includes a wire 12 fixed to the upper part of the telephone pole 11, a distribution wire 14 supported in an insulated state through an insulator 13 on the iron 12, and a jump wire 15 connecting the left and right distribution wires 14 do.

When extra-high voltage customers are located around the distribution line 10, the distribution line 14 is branched with the lead-in line 16 to supply extra-high voltage to the extra-high voltage customers.

Most of Korea's extra-high voltage distribution voltage is a three-phase, four-wire multiple grounding method of 22.9kV-Y, which has various advantages and disadvantages. The recloser or circuit breaker installed in the system operates, and an accident by one customer causes damage to many other customers.

Therefore, in order to minimize damage to sound customers due to accidents by one customer, in the case of 22.9kV-Y, it is recommended to install an automatic selection switch (ASS) (30) for extra-high voltage power supply facilities of 300kVA or more and 1,000kVA or less. making it compulsory

Installed on the telephone pole 11, the down line 16 branched from the distribution line 14 is connected to the input end, and the automatic break section 30 is installed in which the lead line 17 for supplying power to consumers is connected to the output end.

In addition, the lead-in line 17 is connected to the fault section automatic switch 30 through a metering out fit (MOF), and a power fuse is sometimes connected between the fault section automatic switch 30 and the instrument transformer ( see Figure 8).

The fault section automatic switch opens immediately and automatically for an overload or fault current below the standard (less than 800A), and for an overload or fault current above the standard (more than 800A), the recloser of the distribution system and the circuit breaker of the substation It is configured to operate in cooperation with backup protection devices such as (CB; Circuit Breaker).

Cooperative operation of the recloser of the distribution system and the automatic switch in the faulty section

If an accident occurs with a fault current higher than the standard in the consumer, the recloser trips (it becomes a no-voltage state) → automatic tripping through the opening preparation time of 1.4 to 1.7 seconds (84 to 102 Hz) of the fault section automatic switch (30) → trip recloser after about 2 seconds (120Hz) → separate faulty customers, supply power to healthy customers

Cooperative operation of circuit breakers in substations and automatic switches in fault sections

When a fault current of 800A or more flows, the circuit breaker trips at the substation → automatic tripping through the opening preparation time of 3~4Hz of the fault section automatic switch (30) → re-insertion after 18~30Hz of the tripped circuit breaker → separates faulty customers and supplies power to healthy customers

In addition, the failure section automatic switch 30 is provided with a lever-type input handle 31 and a trip handle 32, and a line is hung through a hole formed at the end of the input handle 31 and the trip handle 32 to pull the It can be hooked up or manually inserted or tripped.

The closing handle 31 and the trip handle 32 also serve to indicate whether the automatic switch between failure sections 30 is in an open state or a closed state.

The fault section automatic switch 30 may be mounted on a fixed wancheol 33 fixed to the telephone pole 11.

Considering that the length of the telephone pole 10 is 10 to 16 meters, the automatic operation of the fault section 30 is located at a very high position, so manual operation is very dangerous. 40) is installed.

In the terminal box 40, an operation indicator lamp 51, a phase current correction button 52, a close push button 53, a lamp test button 54, an open push button 55, an ammeter 56, and a reset button 57 ), an inrush current suppression time correction tap 58, a ground fault current correction button 59, and a control device 50 including a power switch 60 is installed (see FIG. 9).

The fault section automatic switch 30 and the control device 50 are connected through a control signal line 70 that transmits a control signal.

When the closing push button 53 and the opening push button 55 are pressed, the fault section automatic switch 30 is inserted or opened.

Here, the fault section automatic switch 30 is not a circuit breaker but a switch (switch), so if it is operated in a state where current flows, an arc can occur and it can be dangerous. should proceed under no load.

The terminal box 40 has a structure in which a hinged door 42 is installed on the front of the housing 41 fixed to the telephone pole 10, and a work table 43 is installed in front of the terminal box 40, and the terminal box ( In 40), in order to insert and open the automatic breakdown switch 30, the operator needs to go up to the work table 43, open the door 42, and operate the input push button 53 and the open push button 55.

In order to supply power to the control device 50 in the terminal box 40, a battery 61 is provided with two 12V batteries connected in series to supply 24V to the inside of the terminal box 40.

The battery 61 must be replaced before it is completely discharged. Even in this case, the operator must climb onto the workbench 43, open the door 42, remove the existing battery 61, and install a new battery 61.

The work table 43 is stipulated to be installed at a height of 4 meters or more. In order to operate the input push button 53 and the open push button 55 of the terminal box 40 or replace the battery 61, the operator must work on the work table ( 43), pull the door 42 to open it, and close it when the work is completed. Since the space between the operator and the terminal box 40 is narrow, the door 42 that opens and closes toward the operator interferes with the operator, causing the door ( 42) is not only very inconvenient to open and close, but in the process of opening and working with the door 42, the door 42 is randomly shaken by the wind and strikes the operator, causing the operator to lose balance and fall. In the process, there is a concern that a tool held by a worker in his hand or carried on a tool belt worn around his waist may fall, causing serious injury to a pedestrian.

As a prior art that solves these problems, Korean Patent Registration No. 10-1440803 (registered on September 5, 2014) "Insulated switchboard for distribution of special high voltage overhead wires" is a strong strength by inserting a door into a door guide pocket provided in a switchboard cabinet. Introduced a technology that prevents the door from shaking even when the wind blows, preventing injuries or falls to workers caused by the door striking the worker, as well as pedestrian injuries caused by falling tools held by the worker. are doing

However, the prior art is composed of a casement type in which the door opens forward. When opening the door, the door is rotated in the direction of the worker's body so that the door forms a right angle with respect to the front of the switchboard cabinet, and then guide pockets provided on both sides of the switchboard cabinet. When closing the door, the door inserted in the guide pocket must be pulled out in the direction of the operator's body, and then rotated to close the door. There is a problem in that a worker standing on a narrow work table footrest has an unstable working posture, such as having to shrink to avoid a door, resulting in a fall accident.

As a prior art that solves these problems, Korean Patent Registration No. 10-1856671 (registered on June 3, 2018) "Insulated switchgear for distribution of special high-voltage overhead wires" has an endless door that can be opened or closed while the door is opened or closed. During the closing process, since there are no elements that protrude toward the operator standing on the work table, the operator can open the front opening of the cabinet body without straining, thereby allowing the operator to work in a stable posture, preventing the operator from falling. It is possible to prevent injury, a gasket is attached between the front opening of the cabinet body and the door belt, integrally formed around the shaft through-hole formed on the upper surface of the cabinet body, and protection having a coupling cylinder having a male screw portion and a female screw portion. Disclosed is a technology in which a cap is provided to prevent intrusion of foreign substances and rainwater into the cabinet body.

However, the above-described prior art has a problem in that it does not completely eliminate the risk of safety accidents due to work at high places because the operator has to stand on a work table installed at a high place (a height of 4 meters or more according to regulations) to perform the work.

Republic of Korea Patent Registration No. 10-1440803 (registered on September 5, 2014) "Insulated switchboard for distribution of overhead wires exclusively for extra-high voltage" Republic of Korea Patent Registration No. 10-1856671 (2018.06.03. Registration) "Insulated switchboard for distribution of overhead wires exclusively for extra-high voltage"

Therefore, an object of the present invention is to raise the terminal box to a fixed position and fix it to a telephone pole, and to lower it to an inspection position to perform inspection work on the ground, thereby fundamentally eliminating various accidents caused by work at high places. It is intended to provide a terminal box device.

Another object of the present invention is to make the control signal line have a margin as much as the lifting height of the terminal box, but the margin is wound at the fixed position and released at the inspection position so that the automatic switch and control device in the fault section can always be connected by the control signal line It is intended to provide a special high voltage distribution terminal box device.

Another object of the present invention is to provide a special high voltage distribution terminal box device in which a bolt head fastening a lower fixture fixed to a telephone pole and a lower block fixed to a terminal box are smoothly engaged with a bolt head groove of a bolt rotation sphere.

The present invention, in order to achieve the above object, is fixed to a telephone pole, the front is open, and a terminal box body having a built-in control device connected to an automatic switch for a fault section installed at the upper end of the telephone pole by a control signal line, and a door for opening and closing the front opening In the extra-high voltage distribution terminal box device including the provided terminal box, an upper block fixed to the upper rear surface of the terminal box body, having a smaller width than the width of the terminal box body, and having a positioning pin protruding from the upper surface, and fixed to the lower rear surface of the terminal box body and a lower block having a larger width than the width of the terminal box body, in which bolt fastening holes penetrating vertically are formed, and having the same width as the upper block and being fixed to a telephone pole, the upper surface of the upper block is in close contact with the lower surface, and the position corresponding to the positioning pin An upper fixture in which a crystal ball is formed, a bolt fastening hole in which the upper surface of the lower block is closely adhered to the lower surface and a fixing bolt fastened to the lower block and an upper block passage groove through which the upper block can pass vertically a terminal box fixing means including a formed lower fixture; A base plate, a front-and-back moving plate supported to be movable laterally on the base plate, a platform installed to be lifted on the upper part of the front-and-back moving plate, a front-and-back driving mechanism that moves the front-and-back moving plate forward and backward, and a lift drive that raises and lowers the platform a moving means including a mechanism; terminal box holding means including a plurality of gripping jaws slidably installed on the lift table to hold the lower edge of the door side of the terminal box, and a plurality of solenoids mounted on the lower surface of the lift table to move the gripping jaws; Fastening means including a fastening motor mounted on the lower surface of the lift platform and having a fastening motor shaft penetrating the lift platform, and a bolt rotation sphere coupled to the upper end of the fastening motor shaft and having a bolt head groove into which the bolt head of the fixing bolt is inserted and engaged. It provides an extra-high voltage distribution terminal box device configured to include.

It is provided on one side of the terminal box body and further includes a cord retractor that winds or unwinds the excess of the control signal line. It is configured to easily insert the pin, and serrations are formed on the outer circumference of the bolt head of the fixing bolt and the inner circumference of the bolt head groove of the bolt rotation sphere, and the lower edge of the bolt head has a conical guide whose diameter decreases as it goes to the bottom. The portion is formed so that the bolt head and the bolt head groove are smoothly engaged.

According to the extra-high voltage distribution terminal box device of the present invention, the terminal box is fixed by including a terminal box fixing means, a moving means including a base plate, a front and rear moving plate, a platform, a front and rear moving mechanism, and a lifting and lowering driving mechanism, a holding means and a fastening means. It is possible to fundamentally exclude various accidents caused by high-altitude work by raising it to a position and fixing it to a telephone pole and lowering it to an inspection position to perform inspection work on the ground.

In addition, according to the special high voltage distribution terminal box device of the present invention, a cord retractor is provided so that the control signal line has a margin as much as the elevation height of the terminal box, but the margin is wound at the fixed position and unwound at the inspection position. is always connected by the control signal line.

In addition, according to the extra-high voltage distribution terminal box device of the present invention, the bolt head groove for fastening the lower fixture fixed to the telephone pole and the lower block fixed to the terminal box and the bolt head groove of the bolt rotation sphere are formed in a circular shape, and the outer circumferential surface of the bolt head and the bolt head groove Serrations are formed on the inner circumferential surface of the bolt head and the bolt head groove are smoothly engaged.

1 to 6 show a preferred embodiment of the extra-high voltage distribution terminal box device according to the present invention,
1 is a perspective view of a special high voltage distribution line to which the present invention is applied;
2 is an exploded perspective view of the present invention;
3 is a perspective view showing a state in which the moving means, the terminal box holding means, and the fastening means are close to the telephone pole;
4 is a perspective view showing a state in which the lift platform is located directly below the terminal box;
5 is a perspective view showing a state in which the elevator platform is raised to a fixed position;
6 is a perspective view showing a state in which the terminal box is lowered to the inspection position together with the lift platform;
7 is a perspective view of a conventional extra-high voltage distribution line;
8 is a schematic diagram showing a conventional extra-high voltage distribution line and a lead-in line;
9 is an internal configuration diagram of a terminal box.

Hereinafter, a special high voltage distribution terminal box device according to the present invention will be described in detail according to preferred embodiments illustrated in the accompanying drawings.

1 to 6 show a preferred embodiment of the extra-high voltage distribution terminal box device according to the present invention.

In the following description, a screw for simply fixing and coupling parts, a screw through hole through which the screw passes, a screw hole to which the screw is fastened, and a nut to which the bolt and the bolt are fastened are not shown, or reference numerals and descriptions are omitted even if shown.

The extra-high voltage distribution line 10 to which the present invention is applied includes a telephone pole 11 installed on the ground near a consumer; It includes a wire 12 fixed to the top of the telephone pole 11 and a distribution wire 14 supported in an insulated state through an insulator 13 to the iron 12.

When extra-high voltage customers are located around the distribution line 10, the distribution line 14 is branched with the lead-in line 17 to supply the extra-high voltage to the extra-high voltage customers.

A failure section automatic switch 30 having an input end connected to the distribution line 14 is installed in the utility pole 11.

In addition, a metering transformer (MOF) connected to the output terminal of the automatic fault section switch 30 and to which the lead-in line 17 is connected to the output terminal, and a metering out fit (MOF) connected between the automatic fault section switch 30 and the instrument transformer A power fuse is installed, but the illustration and description of the instrument transformer and power fuse are omitted.

A terminal box (40) for controlling the automatic switch (30) for faulty sections is installed in the telephone pole (11).

The terminal box 40 is fixed to the telephone pole 11 and is composed of a terminal box body 41 having an open front and a door 42 opening and closing the front opening of the terminal box body 41.

In the terminal box body 41, an operation indicator lamp 51, a phase current correction button 52, an input push button 53, a lamp test button 54, an open push button 55, an ammeter 56, a reset button ( 57), an inrush current suppression time correction tap 58, a ground fault current correction button 59, and a control device 50 including a power switch 60 is installed.

The fault section automatic switch 30 and the control unit CU are connected through a control signal line 70 that transmits a control signal.

The present invention includes a terminal box fixing means 100 for fixing the terminal box 40 to the telephone pole 11.

The terminal box fixing means 100 is fixed to the upper rear surface of the terminal box body 41, has a width smaller than the width of the terminal box body 41, and includes an upper block 110 in which a positioning pin 111 protrudes from the upper surface, and a terminal box body The lower block 120 fixed to the lower rear surface of the 41 and having a larger width than the width of the terminal box body and having a bolt through hole 121 penetrating vertically is formed, and a telegraph pole having the same width as the upper block 110 ( 11), the upper surface of the upper block 110 is in close contact with the lower surface, and the upper fixture 130 in which the positioning hole 131 corresponding to the positioning pin 111 is formed, and the same width as the lower block 120 It is fixed to the utility pole 11 and the upper surface of the lower block 120 is in close contact with the lower surface and the bolt fastening hole 141 to which the fixing bolt 145 is fastened and the upper block 110 can pass vertically. It includes a lower fixture 140 in which a passage groove 148 is formed.

The upper block 110 and the lower block 120 are formed by passing a plurality of screws through the rear plate of the terminal box body 41 and fastening them to the screw holes formed in the upper block 110 and the lower block 120, thereby forming the terminal box body ( 41) can be fixed to the upper and lower parts of the rear surface.

The upper fixture 130 and the lower fixture 140 are provided with fixing pieces 132 and 142, respectively, and fixing pieces 134 formed at both ends of the upper half bands 133 and 143 that are in close contact with the outer circumferential latter half of the telephone pole 11, 144) and (132, 142) can be fixed to the utility pole 11 by bolts passing through and nuts fastened thereto.

Here, the upper block 110 and the upper fixture 130 are formed to have a smaller width than the width of the terminal box body 41, and the lower block 120 and the lower fixture 140 have a width larger than the width of the terminal box body 41. Since the upper block passage groove 148 through which the upper block 110 can pass is formed in the lower fixture 140, the terminal box 40 to which the upper block 110 and the lower block 120 are fixed is installed. When rising from the inspection position lower than the fixture 140 to the fixed position and when the terminal box 40 descends from the fixed position to the inspection position, the upper fixing block 110 is the upper block through groove 148 of the lower fixture 140 It passes through and can be ascended and descended without interference.

The positioning pin 111 and the positioning hole 131 are formed in a conical shape with a smaller diameter as it goes to the top, so that the positioning pin 111 is inserted into the positioning hole 131 from the bottom to smoothly perform the positioning operation. It is desirable to lose

The present invention includes a moving means 200 installed to be able to move up and down between a fixed position and an inspection position.

The moving means 200 includes a base plate 210, a forward/backward movement plate 220 movably supported by the base plate 210 in a lateral direction, and a platform 230 installed to be elevated on the upper part of the forward/backward movement plate 220. ), a front and rear driving mechanism 240 for moving the front and rear moving plate 220 forward and backward, and a lifting and lowering driving mechanism 250 for moving the platform 230 up and down.

The base plate 210 may be installed in the loading box of the work truck.

The base plate 210 is rotatably installed in the loading box of the work truck, and includes a front and rear moving plate 220, a platform 230, a front and rear drive mechanism 240, and a lift drive mechanism directly or indirectly installed on the base plate 210. 250, the terminal box gripping means 300 and the fastening means 400 described later can be configured to rotate together in an upright state and a lying state.

The forward and backward moving plate 220 is moved forward and backward by a guide rail 221 fixed to the base plate 210 and a guide piece 222 fixed to the forward and backward moving plate 220 and guided forward and backward by the guide rail 221. possibly supported.

The front and rear driving mechanism 240 is mounted on a front and rear driving motor 241 mounted on the base plate 210, a front and rear driving screw 243 coupled to the front and rear driving motor shaft 242, and a front and rear moving plate 220, A front and rear drive nut box 244 engaged with the front and rear drive screws 243 is included.

back and forth motion

When the front and rear driving screw 243 rotates clockwise or counterclockwise by the front and rear driving motor 241 of the forward and backward movement mechanism 240, the front and rear driving nut box 244 engaged with the front and rear driving screw 243 moves forward or backward. It moves backward, and the forward and backward moving plate 220 coupled with the forward and backward driving nut box 244 moves forward or backward while being guided by the guide rail 221 and the guide piece 222.

The lift drive mechanism 250 includes a lift drive motor 251 mounted on the lower surface of the front and rear moving plate 220, an lift drive screw 253 installed vertically coupled to the lift drive motor shaft 252, and a lift platform ( 230) and includes a lifting nut box 254 engaged with the lifting drive screw 253.

It is preferable to use a reduction motor with a built-in reduction gear as the lift drive motor 251, and the lift drive screw 253 is coupled to the lift drive motor shaft 252.

It is preferable that the elevation driving screw 253 is supported on the front and rear moving plate 220 by a bearing 255 in which a radial bearing and a thrust bearing are combined to support smooth rotation and thrust load.

If the lifting drive screw 253 has a fixed position of the terminal box 40 at a height of 4 meters from the ground, the length of the lifting drive screw 253 should be 4 meters. When used, if the height of the loading box is about 1 meter, the length of the lift drive screw 253 can be 3 meters.

The lift nut box 254 is inserted into the installation hole H formed in the lift platform 230, and a screw is passed through the expansion part formed in the lower portion and fastened to the screw fastening hole formed on the lower surface of the lift platform 230. 230) can be combined.

In addition, it is preferable that the lifting driving screw 253 and the lifting nut box 254 are composed of a ball screw and a ball nut in order to minimize resistance due to mutual friction and to achieve a smooth lifting operation. do.

lifting operation

When the lift drive screw 253 rotates clockwise or counterclockwise by the lift drive motor 250 of the lift drive mechanism 250, the lift nut box 254 engaged with the lift drive screw 253 rises or falls. Then, the elevator platform 230 to which the elevator nut box 254 is coupled rises or descends.

The present invention includes a terminal box holding means 300 for holding the terminal box 40 and lifting it.

The terminal box gripping means 300 includes a plurality of gripping jaws 310 installed on the platform 230 to be horizontally movable to grip the lower edge of the door side of the terminal box 40 and mounted on the lower surface of the platform 230 to grip A plurality of solenoids 320 for moving the jaw 310 are included.

The gripping jaw 310 has a connecting rod 311 formed on the lower surface, and the connecting rod 311 is passed through the guide hole 312 formed on the platform 230, and the connection formed on the operating rod 321 of the solenoid 320. It is configured to be moved by being fitted and connected to the ring 322.

Here, the gripping jaw 310 is preferably installed to move in a diagonal direction, and for this purpose, guide holes 312 are formed in a diagonal direction, and the solenoid 320 is also installed in a diagonal direction.

In order to prevent the gripping jaw 310 from slipping when the terminal box 40 is gripped, a non-slip coating such as rubber is preferably applied to a surface in contact with the terminal box 40 .

In the illustrated example, the gripping jaw 310 and the solenoid 320 are configured to grip only the edge of the door 42, but the gripping jaw 310 and the solenoid 320 are installed to grip the edge of the terminal box body 41 as well. can

The gripping operation of the terminal box gripping means 300

When the operating rod 321 of the solenoid 320 constituting the terminal box gripping means 300 moves forward, the gripping jaw 310 in which the connecting rod 311 is coupled to the operating rod 321 advances to the standby position, and the solenoid When the operating rod 321 of 320 moves backward, the gripping jaw 310 coupled to the operating rod 321 moves backward to the gripping position.

At this time, since the connecting rod 311 formed on the gripping jaw 310 is guided by the guide hole 312 formed on the platform 230, the gripping jaw 310 accurately moves forward and backward between the standby position and the gripping position. do.

The present invention includes a fastening means 400 for rotating the fixing bolt 145 fastened to the bolt through hole 121.

The fastening means 400 is mounted on the lower surface of the elevator platform 230, the fastening motor shaft 411 passes through the elevator platform 230, and the fastening motor 410 is coupled to the upper end of the fastening motor shaft 411 to provide a fixing bolt ( 145) includes a bolt rotation sphere 420 into which the head 146 is inserted and engaged.

The fastening motor shaft 411 passes through the shaft hole 412 formed in the platform 230 .

Here, when the bolt head 146 of the fixing bolt 145 has a hexagonal head and the bolt head groove 421 into which the head is inserted into the bolt rotation sphere 420 is formed in a hexagonal shape, the bolt rotation sphere 420 has risen. There is a concern that the engagement of the bolt head 146 and the bolt head groove 421 may not be made smoothly.

Therefore, in the present invention, the bolt head 146 and the bolt head groove 421 are formed in a circular shape, and serrations S1 and S2 are formed on the outer circumferential surface of the bolt head 146 and the inner circumferential surface of the bolt head groove 421, It is preferable to form a conical guide 147 whose diameter decreases toward the bottom at the lower edge of the bolt head 146 so that the bolt head 146 and the bolt head groove 421 can be smoothly engaged.

Fastening operation of fastening means 400

The bolt head 145 of the fixing bolt 145 is inserted into the bolt head groove 421 of the bolt rotation sphere 420, and the bolt rotation sphere 420 is connected to the fastening motor 410 in a state where the serrations S1 and S2 are engaged. When the fixing bolt 145 rotates in the tightening direction or the loosening direction when viewed from the bottom by rotating in the clockwise or counterclockwise direction, the fixing bolt 145 passing through the bolt through hole 121 is attached to the bolt fastening hole 141. The lower block 120 is fixed to or separated from the lower fixture 140 by being tightened or loosened.

In addition, the control signal line 70 connecting the fault section automatic switch 30 and the control device 50 also requires a margin of about 3 meters to enable the terminal box 40 to move up and down between the fixed position and the inspection position. .

In order to organize the excess of the control signal line 70, a cord retractor 80 is installed on one side of the terminal box body 41, and the control signal line 70 is removed while the terminal box 40 is in a fixed position. The automatic switch (30) of the faulty section is made by allowing the excess amount to be wound around the cord retractor (80) and releasing the excess amount of the control signal line (70) wound around the code retractor (80) when the terminal box (40) descends to the inspection position. ) and the control device 50 can be always connected by the control signal line 70.

Since the cord retractor 80 may use a conventional one wound and unwound by the tension and spring of a cord, detailed illustration and description thereof will be omitted.

On the other hand, when the moving means 200, the terminal box holding means 300, and the fastening means 400 of the present invention are loaded and transported in the loading box of a work truck, in order to prevent interference with facilities such as power distribution lines or overpasses on the road, the base The plate 210 is moved and fixed so that it is located inside the loading box, the moving means 200, the terminal box holding means 300, and the fastening means 400 are switched to a lying state, and the base plate 210 is moved to the inspection position. It may be provided with a base plate fixing device that allows the moving means 200, the terminal box gripping means 300, and the fastening means 400 to be erected while moving and fixing them outside the loading box.

Since the base plate fixing device can be implemented in various ways by those skilled in the art, detailed illustration and description thereof will be omitted.

In addition, the base plate 210 or the front and rear moving plate 220 has a switch for operating the forward and backward drive motor 241, the lift drive motor 251, the solenoid 320, and the fastening motor 410, and a battery for power supply. can be installed

Hereinafter, the operation of the extra-high voltage distribution terminal box device according to the present invention will be described.

The upper fixture 130 and the lower fixture 140 are fixed to the first utility pole 11, and the terminal box 40 is lifted from the bottom to the top while the upper block 110 and the lower block 120 are fixed to the terminal box body 41. When raised, the positioning pin 111 formed on the upper block 110 is fitted into the positioning hole 131 formed on the upper fixture 130, and the upper surfaces of the upper block 110 and the lower block 120 are the upper fixture ( 130) and the lower surface of the lower fixture 140, pass the fixing bolt 145 through the lower block 120, and fasten to the bolt through-hole 121 formed in the upper fixture 130 to form an upper block 110 By combining the lower block 120, the upper fixture 130 and the lower fixture 140, the terminal box 40 can be fixed to the utility pole 11 by the terminal box fixing means 100.

In transporting the moving means 200, the terminal box holding means 300, and the fastening means 400 to the inspection site, the platform 230 is lowered, and the platform 230, the forward and backward movement mechanism 240 installed therein, and the lift drive mechanism ( The lifting nut box 254 of 250, the terminal box holding means 300, and the fastening means 400 are positioned on the base plate 210, and then the base plate 210 is rotated with respect to the load to move the plate forward and backward ( 220), the platform 230, the front and rear movement mechanism 240, the lift drive mechanism 250, the terminal box gripping means 300, and the fastening means 400 are transported in a laid-down state, such as power distribution lines or overpasses on the road. interference can be prevented from occurring.

When arriving at the inspection site, the moving means 200, the terminal box holding means 300, and the fastening means 400 are erected in a state in which the work truck is stopped close to the telephone pole 11, and the work truck is moved to raise the platform 230. The terminal box 40 is located in the front (see Fig. 3).

At this time, the gripping jaw 310 constituting the terminal box gripping means 300 is placed in a standby position.

Next, according to the movement of the forward and backward movement plate 220 by the forward and backward movement mechanism 230 as described above, the forward and backward movement plate 220 is moved in the direction of the telephone pole 11 so that the forward and backward movement plate 220 moves toward the terminal box 40. ) to be located directly below (see FIG. 4).

In this state, when the lift drive screw 253 is rotated counterclockwise when viewed from below by the lift drive motor 251 of the lift drive mechanism 250, the lift drive screw 253 and the lift nut box 254 Elevator platform 230 to which elevating nut box 254 is coupled by screw action, front and rear moving mechanism 240 installed thereon, elevating nut box 254 of elevating drive mechanism 250, terminal box gripping means 300, and fastening means 400 rises (see FIG. 5).

When the lifting operation is stopped in a state in which the terminal box 40 is raised to the fixed position, the gripping jaw 310 is in a standby position spaced from the lower edge of the terminal box 40.

In this state, when the operating rod 321 of the solenoid 320 constituting the terminal box gripping means 300 moves forward, the gripping jaw 310 coupled with the connecting rod 311 to the operating rod 321 moves from the standby position. By advancing to the gripping position, the lower edge of the terminal box 40 on the door 42 side is gripped.

In addition, when the lifting operation is stopped in the state of rising to the fixed position of the terminal box 40, the bolt of the fixing bolt 145 penetrates the lower fixture 140 and is fastened to the bolt through hole 121 of the lower block 120. The head 146 is inserted into the bolt head groove 421 of the bolt rotation sphere 420 constituting the fastening means 400.

At this time, the bolt head 146 and the bolt head groove 421 of the bolt turning sphere 420 are formed in a circular shape, and the serrations S1 and S2 are formed on the outer circumferential surface of the bolt head 146 and the inner circumferential surface of the bolt head groove 421. ) is formed, and a conical guide 147 whose diameter decreases toward the bottom is formed at the lower edge of the bolt head 146, so that the bolt head 146 is smoothly inserted into the bolt head groove 421 and engaged. can be done

In this state, when the bolt rotation sphere 420 is rotated counterclockwise when viewed from below by the fastening motor 410 constituting the fastening means 400, the fixing bolt 145 rotates in the direction of loosening, and is fixed. When the elevator platform 230 is lowered by the lifting drive mechanism 250 by the length of the bolt 145 being released, the fixing bolt 145 is separated from the bolt through hole 121 .

At this time, if the pitch of the lift drive screw 253 is twice as large as the pitch of the fixing bolt 145, if the rotation speed of the fixing bolt 145 is twice as fast as the rotation speed of the lift drive screw 253, the fixing bolt The unwinding length of 145 and the lowering length of the lifting drive screw 253 and the lifting nut box 254 can be matched.

Accordingly, the fixation of the lower block 120 to the lower fixture 140 is released, and only the positioning pin 111 of the upper block 110 is inserted into the positioning hole 131 of the upper fixture 130. .

In this way, in a state in which the lower block 120 and the lower fixture 140 are unfixed, the lift drive screw 253 is rotated clockwise when viewed from below by the lift drive motor 251 of the lift drive mechanism 250. On the lower surface, the lift platform 230 to which the lift nut box 254 is coupled by the screw action of the lift drive screw 253 and the lift nut box 254, the forward and backward movement mechanism 240 installed therein, and the lift drive mechanism 250 The lifting nut box 254, the terminal box gripping means 300, and the fastening means 400 descend.

In addition, since the terminal box 40 is gripped by the gripping jaw 310 of the terminal box holding means 300, it descends, and the positioning pin 111 of the upper block 110 is the positioning hole of the upper fixture 130 ( 131), and as the descending operation continues, it descends to the inspection position (see FIG. 6).

At this time, the upper block 110 fixed to the upper portion of the terminal box body 41 and formed with a smaller width than the width of the terminal box 40 passes through the upper block passage groove 148 in the lower fixture 140, so that the upper block 110 ) is able to descend without being interfered with by the lower fixture 140.

In a state in which the terminal box 40 is lowered to the inspection position, the lowering operation is stopped, and the door 42 is opened by moving the holding jaw 310 of the terminal box holding means 300 backward to the standby position.

Here, the forward and backward distance between the operating rod 321 and the gripping jaw 310 located on the door 42 side is longer than the forward and backward distance between the operating rod 321 and the gripping jaw 310 located on the terminal box body 41 side. It is preferable that there is no hindrance in opening and closing the door 42.

Thereafter, the door 42 is opened and the control device 50 in the terminal box 40 controls the automatic switch 30 in the failure section or performs an inspection operation such as replacing the battery 61 .

At this time, since the platform 230 is located at a height of about 1 meter, which is the height of the loading box, and the terminal box 40 is located thereon, the operator can safely perform the work while standing on the ground, thereby fundamentally eliminating the risk of a fall accident. .

When the inspection is completed, the terminal box 40 is raised to a fixed position while being held by the holding jaw 310 of the terminal box holding means 300 by the above-described operation and the reverse operation.

When it rises to the fixed position again, the positioning pin 111 of the upper fixture 130 is inserted into the positioning hole 131 of the upper block 110, and the fixing bolt 145 is lowered by the fastening means 400. It is fastened to the bolt through hole 121 of the block 120 so that the terminal box 40 is fixed to the telephone pole 11 through the terminal box fixing means 100.

In this state, the gripping jaw 310 of the terminal box gripping means 300 advances to the standby position and descends to the inspection position by the above-described lowering operation.

Subsequently, the front and rear moving plate 220 is moved in the opposite direction of the telephone pole 11 by the forward and backward moving mechanism 240, and the platform 230 and the front and rear driving mechanism 240 are directly or indirectly installed on the front and rear moving plate 220. The lift driving mechanism 250, the terminal box gripping means 300, and the fastening means 400 are positioned on the loading box, laid down again, and moved to the next inspection site.

The present invention is not limited to the preferred embodiments described with reference to the drawings illustrated above, and various modifications can be made by those skilled in the art within the scope of the technical idea of the present invention.

30: fault section automatic switch 40: terminal box
50: control device 70: control signal line
90: truck 100: terminal box fixing means
110: upper block 120: lower block
130: upper fixture 140: lower fixture
200: means of transportation 210: base plate
220: back and forth moving plate 230: lift platform
240: forward and backward movement mechanism 250: lift drive mechanism
300: terminal box gripping means 310: gripping jaw
320: solenoid 400: fastening means
410: fastening motor 420: bolt rotation sphere

Claims (2)

A terminal box body with a built-in control device fixed to a telephone pole, the front surface open, and a control device connected to a fault section automatic switch installed at the top of the telephone pole by a control signal line, and a terminal box equipped with a door for opening and closing the front opening, and provided on one side of the terminal box body In the known extra-high voltage distribution terminal box device including a cord retractor that winds or unwinds the excess of the control signal line,
An upper block fixed to the upper rear surface of the terminal box body, having a width smaller than the width of the terminal box body, and having a positioning pin protruding from the upper surface; The lower block in which the bolt through hole is formed, the upper fixture having the same width as the upper block, fixed to the telephone pole, the upper surface of the upper block in close contact with the lower surface and the positioning hole corresponding to the positioning pin is formed, and the same width as the lower block A terminal box fixing means including a lower fixture fixed to a telephone pole and having a lower fixture formed with a bolt fastening hole to which the upper surface of the lower block is in close contact and fastened with a fixing bolt and an upper block passage groove through which the upper block can pass vertically;
A base plate installed in the loading box of the work truck, a front and rear moving plate supported to be movable laterally on the base plate, a platform installed to be lifted on the top of the front and rear moving plate, and a forward and backward driving mechanism for moving the front and rear moving plate forward and backward ,
A hoist that elevates the platform by including a lift drive motor mounted on the lower surface of the front and rear moving plate, a lift drive screw coupled to the shaft of the lift drive motor and installed vertically, and a lift nut box coupled to the lift platform and engaged with the lift drive screw. A moving means including a synchronization mechanism;
terminal box gripping means including a plurality of gripping jaws slidably installed on the lift platform to grip the lower edge of the door side of the terminal box, and a plurality of solenoids mounted on the lower surface of the lift platform to move the gripping jaws;
A fastening motor mounted on the lower surface of the lift platform and having a fastening motor shaft penetrating the lift platform, and a bolt rotation sphere coupled to the upper end of the fastening motor shaft and having a bolt head groove into which the bolt heads of the fastening bolts are inserted and engaged, so that the fixing bolts are installed on the lower It is configured to include a; fastening means to be fastened to the bolt fastening hole of the block,
A serration that engages with each other is formed on the outer circumference of the bolt head of the fixing bolt and the inner circumference of the bolt head groove of the bolt rotation sphere, and a conical guide portion whose diameter decreases toward the bottom is formed on the lower edge of the bolt head, so that the bolt head and the bolt head groove An extra-high voltage distribution terminal box device, characterized in that it is configured to smoothly engage. delete

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