KR102266534B1 - Distribution cable connection system for underground power distribution - Google Patents

Abstract

The present invention relates to a distribution line connection system for underground power distribution which quickly separates a connector coupled to a right cable in case of a failure in a vertical direction to block left and right cables and moves the connector to the right to separate a left conductor end of the left cable from a connection fixture of the connector so as to sufficiently obtain an insulation distance, thereby preventing arc generation between the left conductor end and the connector and which makes a blocking operation of the left and right cables and a separation operation between the left conductor end and the connector to be performed mechanically sequentially, thereby smoothly performing the blocking operation and the separation operation without interfering with each other.

Description

Distribution cable connection system for underground power distribution}

The present invention relates to a distribution line connection system for underground distribution among the technologies in the distribution field, and more particularly, when a failure occurs, the connector coupled to the right cable is quickly separated vertically to block the left and right cables, and the connector is moved to the right to move the left cable Separate the left conductor end of the connector from the connector to ensure a sufficient insulation distance to prevent arcing between the left conductor end and the connector, as well as the blocking operation of the left and right cables and the separation operation between the left conductor end and the connector It relates to a distribution line connection system for underground distribution so that the blocking operation and the separation operation can be performed smoothly without interfering with each other by making this mechanically sequentially.

Although underground distribution lines have several advantages compared to overhead distribution lines, they have problems in terms of maintenance and repair. In particular, when an accident occurs in an underground distribution line, the discovery and recovery of the accident point cannot be carried out quickly. There is a problem.

Therefore, power companies have developed a technology for detecting and responding to faulty sections of underground distribution lines in order to quickly find and respond to accident points.

Korean Patent Registration No. 10-0956712 (published on May 6, 2010) "Automatic switchgear for faulty sections of power transmission and distribution lines" (announced on May 6, 2010) as a prior art related to the technology related to the technology for detecting and coping with the fault section of the conventional underground distribution line Hereinafter, referred to as 'prior art 1'), the voltage and current of the load end are detected by the sensor means installed in a certain part of the transmission and distribution line, and the CPU determines the fixed point in real time according to the detection signal of the sensor means. Disclosed is a technology for temporarily blocking a faulty line.

However, the prior art 1 also includes a connection connecting member fixedly installed at the ends of the transmission and distribution lines on both sides in order to block the faulty line; an operation connecting member rotating by the motor means and the rotating shaft means; Equipped with a CPU for controlling the motor means, when the transmission/distribution line is normal, the operation connection member is connected to the connection member, and when the transmission/distribution line is faulty, the operation connection member is rotated and connected by the motor means and the rotating shaft means Since the means for separating the transmission and distribution lines from the connection member and separating the two transmission and distribution lines is installed individually for each distribution cable of each distribution line, the facility is very complicated and it is necessary to have a motor equivalent to the number of distribution lines, which greatly increases the facility cost. There is a problem being

Also, in the case of the underground distribution line in which the distribution lines are seated on a plurality of shelves installed in the underground tunnel, in the case of the prior art 1, it is difficult to adopt the structure of the prior art 1 because the distance between the shelves is limited.

In addition, as a prior art, Republic of Korea Patent Registration No. 10-2113653 (announced on May 22, 2020) "Real-time remote monitoring system of underground distribution lines" (hereinafter referred to as 'Prior Art 2') detects a failure section of an underground distribution line Thus, the first cable and the second cable are cut off, and the failure section is notified to the terminal of the manhole in the failure section together with the management center server, the terminal of the patrol vehicle, and the mobile terminal of the patrol car, so that the failure can be quickly recovered. By notifying the consumer's distribution box terminal of the occurrence of a power outage and the expected recovery time, the consumer can cope with it, and by forming an insulating film around the end of the blocked second cable, it is possible to prevent a fire caused by an arc between the first cable and the second cable. In addition, the operation of forming an insulating film around the end of the exposed conductor of the blocked second cable by providing an opening/closing plug and opening/closing plate that interlock with the connector is linked with the operation of blocking the left and right cables to generate a separate power. Disclosed is a technique for not using it.

However, in the prior art 2, the distance between the exposed conductor ends of the first and second cables in the state where the first and second cables are blocked is between the exposed conductor ends of the first and second cables in the connected state. Since the distance of the s is maintained the same, there is a problem in securing insulation between the first and second cables even after being cut off.

In addition, in Prior Art 2, since an operating space is formed on a shelf to constitute a driving means of a connector for connecting the first and second cables, the cables seated on the shelves of the corresponding floor and the cables seated on the shelves of the upper and lower floors There is a problem in that insulation between the two is not reliably secured.

Republic of Korea Patent No. 10-0956712 (Announcement on May 6, 2010) "Automatic switching device for faulty sections of power transmission and distribution lines" Republic of Korea Patent No. 10-2113653 (Notice on May 22, 2020) "Real-time remote monitoring system for underground distribution lines"

Therefore, it is an object of the present invention to quickly separate the connector coupled to the right cable vertically in the event of a failure, block the left and right cables, and move the connector to the right to space the left conductor end of the left cable and the connector of the connector to ensure sufficient insulation distance. It is intended to provide a distribution line connection system for underground distribution that can prevent arcing between the left end of the conductor and the connector as much as possible.

Another object of the present invention is to make the blocking operation of the left and right cables and the separation operation between the left conductor end and the connector performed mechanically sequentially so that the blocking operation and the separation operation can be smoothly performed without interfering with each other. is intended to provide

According to the present invention, in order to achieve the above object, the connector connects or blocks the left and right conductor ends under the control of the control means including the left and right fault detection sensors installed on the left and right cables seated on the shelf installed on the inner wall of the underground tunnel. A distribution line connection system for distribution, comprising: blocking means for blocking left and right cables by elevating the connector; Separation means for moving the blocking means and the connector to the left connection position and the right separation position; further comprising, the blocking means includes a blocking solenoid having a lifting operation insulating rod coupled to the lower end of the right insulator of the connector, and underground tunnel A pair of front and rear guide rails fixed to the lower surface of the upper end and lower surface of the shelf, and a slider coupled to the upper end of the blocking solenoid and movably supported by the guide rail to the left and right, the spacer means is the guide A separation solenoid installed at a distance from the right side of the rail and having a horizontal operating rod protruding from the left, a connection member coupled to the left end of the horizontal operating rod and having a pair of connecting pieces having long holes formed from side to side, and protruding from the right side of the slider and provides a connection protrusion having a connection pin hole corresponding to the long hole, and a connection pin inserted into the long hole and the connection pin hole.

According to the distribution line connection system for underground distribution of the present invention, it is provided with a blocking means and a separation means to quickly vertically separate the connector coupled to the right cable when a failure occurs to cut off the left and right cables and move the connector to the right to move the left conductor of the left cable It is possible to prevent arcing between the left end of the conductor and the connector by separating the end and the connector of the connector so that the insulation distance is sufficiently secured.

In addition, according to the distribution line connection system for underground distribution of the present invention, even if the control command for the blocking means and the control command for the separation means are output at the same time, the blocking operation of the left and right cables and the separation operation between the left conductor end and the connector are mechanically sequentially performed. Therefore, the blocking operation and the separation operation can be smoothly performed without interfering with each other.

1 to 7 show a preferred embodiment of a distribution line connection system for underground distribution according to the present invention,
1 is a perspective view showing the entire distribution line;
2 is a perspective view showing a connector, a connector blocking means, and a connector spacing means installed on one shelf;
3 is a perspective view seen from the top and bottom of the connector;
4 is an exploded perspective view of the connector blocking means and the connector spacing means;
5 is a functional block diagram of the control means;
6 is a longitudinal cross-sectional view showing a state in which left and right cables are connected;
7 is a longitudinal sectional view showing a state in which the left and right cables are cut off and the connector is spaced apart from the left conductor end of the left cable.

Hereinafter, a distribution line connection system for underground distribution according to the present invention will be described in detail according to a preferred embodiment illustrated in the accompanying drawings.

Although the embodiments have been described above, the present invention is not limited to the above-described embodiments, and those of ordinary skill in the art to which the present invention pertains without departing from the gist of the invention as claimed in the claims below It will be said that anyone can implement various modifications, and such modifications are also included in the technical spirit of the present invention.

1 to 7 show a preferred embodiment of the distribution line connection system for underground distribution according to the present invention.

In the following description, the insulating component is composed of a synthetic resin having insulating properties, and the component, which is not limited to other materials, is composed of a metal material or a common material.

As shown in Figs. 1 to 7, the distribution line connection system for underground distribution according to this embodiment is installed on the shelf 20 in multiple layers on the inner wall surface of the underground tunnel 10, which is a concrete structure installed underground, respectively. It is applied to the underground distribution system in which the left cable 30 and the right cable 40 are supported.

The underground tunnel 10 may be constructed by pouring concrete underground or assembling prefabricated concrete blocks.

The shelf 20 can be fixed to the inner wall surface of the underground tunnel 10 by an anchor bolt protruding and embedded in the inner wall surface of the underground tunnel 10 and an anchor nut fastened thereto, which is equivalent to a conventional technique. Therefore, a detailed description thereof will be omitted.

In the illustrated example, it is illustrated that three distribution cables are seated on each shelf 20, but the number is not specified.

At the inner and outer ends of the shelf 20, inner and outer protrusions 21 and 22 are formed, respectively.

Insulated cables are used for the left and right cables 30 and 40, and the left and right insulating coatings 32 and 42 of the opposite ends of the left and right cables 30 and 40 are peeled off to expose the left and right conductor ends 31 and 41. installed in the state

The left and right cables 30 and 40 may be mounted directly on the shelf 20 , but preferably, they are mounted on the tray 23 made of an insulating material fixed on the shelf 20 .

A distribution line connection system for underground distribution according to the present invention includes a connector 100 installed between the left cable 30 and the right cable 40;

a blocking means (200) for elevating the connector (100) to block the left and right cables (30, 40);

a separation means 300 for moving the blocking means 200 and the connector 100 to a left connection position and a right separation position; and

and a control means 400 for controlling the blocking means 200 and the spacing means 300 .

The connector 100 includes a left insulating support 110 covered on the lower third of the outer peripheral surface of the left conductor end 31,

The crimping ring part 121 that is pressed and fixed to the right conductor end 41 and the crimping ring 121 are integrally formed at the left end of the crimping ring 121 and are formed in a downwardly open "C" shape, the upper portion of the outer peripheral surface of the left conductor end 31 A connecting material 120 having an elastic part 122 that is elastically closely connected to 2/3, and

and a right insulator 130 having a compression ring part insulator 131 coated on the compression ring part 121 and an elastic part insulator 132 coated on an outer circumferential surface of the elastic part 122 (see FIG. 3 ). .

The left insulating support 110 is for insulation between the left conductive end 31 and the tray 23 and may be fixed to the left conductive end 31 .

An inclined surface 123 contacting the outer peripheral surface of the left conductive end 31 is formed at the lower end of the elastic part 122 so that the elastic part 122 is smoothly connected to the left conductive end 31 .

The elastic part 122 is configured to open elastically when the connecting member 120 is lifted upward, and the connection to the left conductor end 31 is released.

The right insulator 130 may be molded in a state in which the connecting material 120 is integrally inserted by fixing the connecting material 120 to the mold during the molding process.

The blocking means 200 includes a blocking solenoid 210 having a lifting operation insulating rod 211 whose lower end is coupled to the right insulator 130 of the connector 100,

A pair of guide rails 220 fixed to the upper lower surface of the underground tunnel 10 and the lower surface of the shelf;

It is configured to include a slider 230 coupled to the upper end of the blocking solenoid 210 and movably supported by the guide rail 210 to the left and right,

A pair of connecting protrusions 133 are formed on the right insulator 130 to couple the lower end of the right insulator 130 and the lifting operation insulating rod 211, and the connecting protrusion ( The connector 212 in which the connecting hole 213 into which the 133 is fitted is formed is coupled.

The pair of front and rear guide rails 220, corresponding to the uppermost shelf 20, are fixed to the lower surface of the upper end of the underground tunnel 10 and the lower surface of each shelf 20 except for the lowermost shelf.

In fixing the guide rail 220 to the upper lower surface of the underground tunnel 10 and the lower surface of the shelf 20, the anchor bolts embedded in the upper lower surface of the underground tunnel 10 and the lower surface of the shelf 20 and protruding therefrom It can be fixed by the anchor nut to be fastened, which corresponds to a conventional technique, so a detailed description thereof will be omitted.

The front and rear pair of guide rails 220 are provided with guide grooves 221 which are formed long from side to side on surfaces facing each other.

The guide groove 221 has a connection position stopper 222 formed at the left end and a separation position stopper 223 formed at the right end so that the slider 230 does not deviate from the connection position to the left or to the right from the separation position. .

The slider 230 includes a coupling part 231 coupled to the upper end of the blocking solenoid 210, and a guide protrusion 232 that is spaced apart from the upper surface of the coupling part 231 and inserted into the guide groove 221. and a connecting piece 233 connecting the coupling portion 231 and the guide protrusion 232 .

The coupling part 231 is formed in the form of a cap with an open lower surface to surround the top of the blocking solenoid 210 , and may be coupled to the top of the blocking solenoid 210 by fastening a screw.

The separation means 300 is installed to be spaced apart on the right side of the guide rail 220, and a separation solenoid 310 having a horizontal operation rod 311 protruding from the left side;

A connecting member 320 coupled to the left end of the horizontal operation rod 311 and having a pair of connecting pieces 321 having a long hole 322 elongated from side to side formed therein;

a connecting protrusion 330 protruding from the right side of the slider 230 and having a connecting pin hole 331 corresponding to the long hole 322;

It is configured to include a connection pin 340 inserted into the long hole 322 and the connection pin hole 331 .

The spaced solenoid 310 is fixed to the lower surface of each shelf 20 except for the upper lower surface and the lowermost shelf of the underground tunnel 10 by a fixture 350 .

The fixture 350 includes a square ring 351 surrounding the spacing solenoid 310, a fixing piece 352 fixed to the upper lower surface of the underground tunnel 10 and the lower surface of the shelf 20, and the square ring 351 ) and a connecting piece 353 connecting the fixed piece 352 .

The fixing piece 352 of the fixture 350 is fixed to the lower surface of the upper end of the underground tunnel 10 and the lower surface of each shelf 20 except for the lowermost shelf, which corresponds to the uppermost shelf 20 .

In fixing the fixing piece 352 to the upper lower surface of the underground tunnel 10 and the lower surface of the shelf 20, an anchor bolt that is embedded in the upper lower surface of the underground tunnel 10 and the lower surface of the shelf 20 and protrudes therefrom It can be fixed by the anchor nut to be fastened, which corresponds to a conventional technique, so a detailed description thereof will be omitted.

The connection pin hole 331 and the connection pin 340 are located at the right end of the long hole 322 in the connection position, and are located at the left end of the long hole 322 in the spaced apart position.

The control means 400 is installed on the left and right cables 30 and 40 to detect the failure of the left and right fault detection sensors 411 and 412, the management center server 421 and the patrol terminal 422 to monitor information. A communication unit 420 that transmits, and a control unit 430 that outputs a control command to the blocking solenoid 210 and the separation solenoid 310 according to the detection signals of the left and right fault detection sensors 411 and 412. (See Fig. 5).

Power supply to the left and right failure detection sensors 411 and 412, the bride 420, and the control unit 430 can be performed in a conventional manner, so a detailed description thereof will be omitted.

The control command for the blocking solenoid 210 is divided into a connection control command and a blocking control command, and the control command for the separation solenoid 310 is divided into a connection position maintenance control command and a separation control command.

Hereinafter, the operation of the distribution line connection system for underground distribution according to the present invention will be described.

If the failure detection signal is not input to the control unit 430 because a failure is not detected in the left and right failure detection sensors 411 and 412, the control unit 430 controls the blocking solenoid lowering command for the blocking solenoid 210 and the separation solenoid 310 Outputs the separation solenoid forward control command for

In accordance with the blocking solenoid lowering command of the control unit 430, the lifting operation insulating rod 211 of the blocking solenoid 210 and the connector 212 coupled to the lower end are descended, and the connector 100 connected to the connector 212 is goes down

At this time, since the crimping ring portion 121 of the connecting material 120 is crimped and fixed to the right conductor end 41 , the right cable 40 descends together with the connector 100 .

As the connector 100 descends, the lower end of the elastic part 122 comes into contact with the outer circumferential surface of the left conductive end 31 so that the elastic part 122 is opened and elastically restored.

Therefore, since the compression ring portion 121 of the connecting material 120 is compressed and fixed to the right conductor end 41, and the elastic portion 122 is covered and closely adhered to the left conductor end 31, the left conductor end 31 and the right conductor end 41 is connected via the connecting member 120 (refer to FIG. 6).

In the process in which the elastic part 122 is covered with the left conductor end 31, the inclined surface 123 is elastically spread while in contact with the outer circumferential surface of the left conductor end 31 and is elastically restored. The elastic part 122 is smoothly connected.

On the other hand, according to the separation solenoid forward control command for the separation solenoid 310, the horizontal operation rod 311 of the separation solenoid 310 advances to the left, and the horizontal operation rod 311 has a connection member 320, a connection protrusion 330, the slider 230 connected to the horizontal operation rod 311 through the connection pin 340, the blocking solenoid 210 coupled thereto, and the connector 100 coupled to the lifting operation insulating rod 211 are Moving forward to the left, the blocking solenoid 210 and the connector 100 are moved to the connection position.

Here, the control unit 430 outputs the separation solenoid forward control command first, outputs the blocking solenoid descending command with a time difference, and after the connector 100 is moved to the connection position by the separation means 300, the blocking means 200 connection operation can be made.

Next, when a failure is detected in the left and right failure detection sensors 411 and 412 and a failure detection signal is input to the control unit 430 , the control unit 430 controls the blocking solenoid raising command for the blocking solenoid 210 and the separation solenoid 310 . Outputs the separation solenoid backward command for

In accordance with the blocking solenoid raising command of the control unit 430, the lifting operation insulating rod 211 of the blocking solenoid 210 and the connector 212 coupled to the lower end thereof descend, and the connector 100 connected to the connector 212 is will rise

At this time, since the crimping ring portion 121 of the connecting material 120 is crimped and fixed to the right conductor end 41 , the right cable 40 is pulled together with the connector 100 .

As the connector 100 is pulled up, the lower end of the elastic part 122 is covered on the outer circumferential surface of the left conductive end 31 and the elastic part 122 in contact with it is opened, and the left conductive end 31 is separated from the left conductive end 31. ) and the right conductor end 41 are blocked.

On the other hand, the horizontal operation rod 311 is moved to the right according to the separation solenoid backward command for the separation solenoid 310, and the horizontal operation rod 311 has a connection member 320, a connection protrusion 330, a connection pin ( The slider 230 connected to the horizontal operation rod 311 through 340, the blocking solenoid 210 coupled thereto, and the connector 100 coupled to the lifting operation insulating rod 211 move backward to the right, and the blocking solenoid ( 210 and the connector 100 are moved to a spaced position.

Here, even if the control unit 430 outputs the blocking solenoid rising command and the separation solenoid backward command at the same time, the connecting pin 340 connecting the connecting member 320 and the connecting protrusion 330 at the connecting position is the long hole of the connecting member 320 ( 322), the horizontal operating rod 311 starts to move backward and the connecting rod 330 does not move to the right until the connecting pin 340 is located at the left end of the long hole 322 of the connecting member 320. only after the connecting pin 340 is positioned at the left end of the long hole 322 of the connecting member 320, the connecting rod 330, the slider 230, and the blocking solenoid 210 move backward to the right.

Therefore, the blocking operation by the blocking means 200 is performed first, and then the separation operation by the spacing means 300 is performed with a time difference, so that the blocking operation of the left and right cables 30 and 40 is performed quickly and the blocking operation and the separation The operation is performed smoothly without interfering with each other (see Fig. 7).

Therefore, the separation of the connector 100 and the separation of the right cable 40 are made together with the blocking of the left and right cables 30 and 40, so that the insulation distance between the connector 100 and the left conductor end 31 is sufficiently secured, so that the arc It is possible to prevent the occurrence of fires and resulting fires.

In addition, the control unit 430 outputs the monitoring information transmission command. Accordingly, the communication unit 420 sends the fault detection signal to the management center server 421 and the patrol terminal 422 to the left and right cables 30 and 40. monitoring information is sent.

Accordingly, the management center and patrol officers can quickly respond to failures in real time according to the received monitoring information.

10: underground tunnel 20: shelf
30, 40: left and right cables 100: connector
200: blocking means 300: separation means
400: control means

Claims (1)

In a distribution line connection system for underground distribution in which a connector connects or blocks left and right conductor ends under the control of a control means including left and right fault detection sensors installed on left and right cables seated on a shelf installed on an inner wall surface of an underground tunnel,
The connector 100 is integrally formed with a crimping ring part 121 that is crimped and fixed to the right conductor end 41 of the right cable and the left end of the crimping ring part 121 and is formed in a downwardly opened "C" shape. The connector includes a connector 120 having an elastic part 122 that is elastically closely connected to the upper 2/3 of the outer circumferential surface of the conductor end 31 so that the connector can operate in a connection position, a blocking position, and a spaced apart position with respect to the left cable. When the right conductor end of the right cable is configured to move up and down and left and right together with the connector, a blocking solenoid having a lifting operation insulating rod coupled to the lower end of the right insulator of the connector, and fixed to the upper lower surface of the underground tunnel and the lower surface of the shelf A blocking means including a pair of front and rear guide rails and a slider coupled to the upper end of the blocking solenoid and supported movably on the guide rail to allow the right cable to go up and down together with the connector to the connection position and the blocking position; ; A separation solenoid installed at a distance from the right side of the guide rail and having a horizontal operation rod protruding from the left side, a connection member coupled to the left end of the horizontal operation rod and having a pair of connecting pieces having long holes formed from side to side, and the right side of the slider a spacer means for allowing the right conductor end of the right cable to move left and right together with the connector, including a connecting protrusion protruding from and having a connecting pin hole corresponding to the long hole, and a connecting pin inserted into the long hole and the connecting pin hole; and left and right fault detection sensors installed on the left and right cables to detect a failure, a communication unit that transmits monitoring information to the management center server and the patrol terminal, and a blocking solenoid and a separation solenoid according to the detection signal of the left and right fault detection sensors Including control means having a control unit for outputting a control command,
When a failure is detected in the left and right fault detection sensors, the right conductor end of the connector and the right cable rises by the blocking means under the control of the control unit, and the blocking operation is performed, and the right conductor end of the connector and the right cable is connected to the right side by the separation means spaced operation is made so that the insulation distance between the connector for the left conductor end of the left cable and the right conductor end of the right cable is sufficiently secured to prevent arcing and fire Distribution line connection system for underground distribution.

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