KR101774241B1 - Safety device for insulation connector of underground line - Google Patents

Abstract

The safety device of the wire connection to the underground distribution line is started. According to the embodiment of the present invention, when the connector for connecting the lead wire to the lead wire is damaged, the safety wire of the underground power distribution line is separated from the live wire and the neutral wire so that the explosion, fire and short- And it is possible to prevent an electric shock accident by preventing moisture from coming into contact with the conductor line of the live wire of the incoming wire and the conductor wire of the neutral wire even if water flows into the underground pipe due to a tsunami or flood with the earthquake.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for an underground distribution line,

The present invention relates to a safety device for a wire connecting line to an underground power distribution line among technologies of distribution, and it is an object of the present invention to prevent a short circuit of a lead wire when a connector for connecting a lead wire and a lead wire is damaged by a strong shock such as an earthquake, To the underground distribution line with the cable connection.

Generally, processing facilities using electric poles have been widely used to supply electric power to electric power customers in urban areas. However, these processing facilities are being replaced by underground facilities for safety reasons and cosmetic reasons.

Underground distribution lines are installed in the underground pipelines embedded in the underground and connected to the ground level distribution boards through connectors.

The connector is connected at both ends to a lead wire leading from the power source and a lead wire drawn out from the switchboard so that power is supplied from the power source to the switchboard.

However, when a large impact such as an earthquake or a gas explosion occurs, the impact is transmitted through the lead wire provided in the underground pipe, so that the connection state of the lead wire connecting the lead wire and the lead wire may be damaged.

In this case, if the incoming wire is short-circuited, it can be directly connected to the explosion or fire. If the incoming wire is in contact with the underground pipe, a short circuit may occur and there is a possibility of electric shock to nearby people.

Especially when a tsunami occurs together with a disaster at the time of an earthquake or a disaster such as flood due to heavy rain overlaps, conductive water may flow into the underground pipeline, which may cause more serious accidents.

In order to solve such a problem, Korean Patent Registration No. 10-0907747 (Jul., 2009) proposed a "short-circuiting insulation band for preventing electric leakage of buried distribution cables" (hereinafter referred to as "prior art document 1").

However, in the prior art document 1, the first cap and the second cap are respectively put on the lead wire and the lead wire. When the connection between the lead wire and the lead wire is lost due to the vibration when an earthquake occurs, the first cap is put on the lead wire The first cap, the second cap, and the second cap are coupled while the first and second caps are coupled to the panel, so that the electric shock and the fire accident due to the electric leakage can be prevented. However, The first cap, the panel, and the second cap are combined, it can not be guaranteed that the lead wire, the second cap, the panel, and the first cap are coupled to each other In this case, there is a short circuit between the two incoming wires. As a result, a short circuit, an electric shock, and a fire accident may be caused.

In the prior art document 1, the supporting member, which was normally kept in a vertical position, is first turned downward to a horizontal state in the event of an accident, and then descended on a supporting stand where the inlet cable, the first cap, However, in some cases, the lead wire, the first cap, the panel and the second cap may be lowered first, and the support member may then be turned downward. Therefore, There is a problem that a fire accident can not be surely prevented.

Also, in the prior art document 1, there is provided a spring for supporting the panel. However, since the spring itself constituted by the conductor may be a cause of short circuit, short circuit and short circuit, and thus electric shock and fire accident can not be surely prevented .

Therefore, there is a need for measures to prevent electric shocks and fire accidents due to short - circuit and short - circuit between incoming wires when an earthquake occurs.

Korean Patent Registration No. 10-0907747 (Name of invention: Separation preventing wire for buried distribution cable, registered on Jul.07, 2009.)

The present invention is intended to prevent a short-circuit of an incoming wire when a connector connecting a lead-in wire and a lead-out wire is damaged by an earthquake or the like.

In addition, the present invention is intended to prevent short-circuit or short-circuiting of the incoming wire even if water is introduced into the underground pipe due to a tsunami or flood due to an earthquake.

According to an aspect of the present invention, there is provided an underground pipeline, comprising: an underground pipe embedded in the ground; a lead wire installed in the underground pipe; an outgoing wire supplied with power from the lead wire; A safety device for a wire connection with an underground distribution line including a connector for electrically connecting and a protection means disposed in the underground pipe can be provided.

The connector includes a notch having a reduced cross-sectional area formed at an intermediate portion thereof, one end connected to a conductor wire exposed at an end of the lead wire, the other end connected to a conductor core exposed at an end of the lead wire, Out connection means for connecting one end portion of the connection bar to the conductor wire of the lead wire and an inlet connection means for connecting the other end of the connection bar to the conductor wire of the lead wire.

The protection means includes a fixing portion fixed to an inner wall of the underground pipe and having a conductor core and a lead connecting means of the lead wire disposed inside the upper portion thereof and made of a hard insulator, A movable part formed on a bottom surface of the insulated electric wire and having a container shape in which the conductor wire of the inserting wire and the inserting connecting means and the notch are disposed in the inserting insulator and the upper side is opened; A supporting rib which is in close contact with the outer circumferential surface and extends in the longitudinal direction of the lead wire, and a stretchable portion formed by an insulator having elasticity connecting between the fixed portion and the movable portion and stretched when a tensile force is applied, And a connection hole formed by the connection bar, A vertical partition wall formed by an insulator which seals a space formed by the movable part and the horizontal partition and a part where the live wire is disposed and a part where the neutral line is disposed; And an elastic cover formed of an insulator having elasticity and provided on the other side so as to cover the connection hole.

Wherein a swelling portion is formed around a circumferential portion of the transverse bulkhead on which the connecting hole is formed and the swelled portion is composed of an insulator having a plurality of corrugations and elasticity disposed on an upper surface of the transverse bulkhead, And a contact surface for connecting the upper expansion surface and the lower expansion surface are formed on the lower expansion surface and the lower expansion surface, the lower extension surface being made of an insulator having a plurality of wrinkles and being elastic, And a swelling material accommodated in the accommodating space formed by the lower extension surface and the contact surface.

A plurality of slits having a shape embedded in the surface of the contact surface may be formed.

According to the present invention, when a connector connecting a lead-in wire and a lead-out wire is damaged by an earthquake or the like, the live wire and the neutral wire of the lead wire are separated from each other, thereby preventing explosion, fire and short-

Also, according to the present invention, it is possible to prevent an electric shock accident by preventing moisture from coming into contact with the conductor core of the live wire of the incoming wire and the conductor core of the neutral wire, even if water flows into the underground pipe due to a tsunami or flood.

1 is a view illustrating a state in which a safety device of a wire connecting rod is installed in an underground distribution line according to an embodiment of the present invention;
Fig. 2 is an enlarged view showing a safety device of a wire connecting rod in a usual underground distribution line shown in Fig. 1. Fig.
3 is a view for explaining the emergency operation of the wire connecting rod to the underground distribution line shown in Fig. 2
Fig. 4 is a view for explaining the operation of the elastic cover and the connection hole of the safety device of the wire connecting rod in the usual underground distribution line shown in Fig. 2
5 is a cross-sectional view taken along the line AA of FIG.
6 is a view for explaining an emergency operation of the elastic cover and the connection hole of the safety device of the wire connecting rod by the underground distribution line shown in FIG.
And
7 is a sectional view taken along the line BB of Fig.

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

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

FIG. 1 is a view illustrating a safety device of an underground distribution line with a wire connection according to an embodiment of the present invention. FIG. 2 is a schematic view illustrating a safety device of a wire connection with a conventional underground distribution line, An enlarged view is shown.

Referring to FIGS. 1 and 2, the safety device 1 of the underground power distribution line includes an underground pipe 40, a lead wire 200, a lead wire 100, a connector 300 And a protection means 500 are included.

The underground piping 40 is installed in the underground 31 below the ground 30, and an installation space 41 is formed therein. The incoming wire 200 is connected to an electric power source (not shown) and supplies electric power to the electric power supply source (not shown), and is installed in the underground pipe 40.

The present embodiment assumes that the power supplied from the incoming wire 200 is supplied to the outgoing wire 100 of the switchboard 10 installed on the ground. For reference, the distribution box 20 is a housing for protecting the switchboard 10.

The lead wires 100 and the lead wires 200 are electrically connected by the connector 300 so that power is applied to the lead wires 200. [ The connector 300 includes a connecting bar 310, a lead connecting means 330, and a lead connecting means 350.

The cover 110 is removed at the end of the lead wire 100 to form a portion where the conductor core wire 120 is exposed and the cover 210 is removed at the end of the lead wire 200 to remove the conductor core wire 220. [ So that the exposed portion is formed.

Next, one end of the connecting bar 310 is connected to the conductor core wire 120 of the lead wire 100 by using the lead connecting means 330, and the other end of the connecting bar 310 is connected to the lead wire To be connected to the conductor core wire (220) of the antenna (200).

Since the connecting bar 310 is a rod made of a conductor, the lead wire 100 and the lead wire 200 are electrically connected.

For reference, a notch 311 is formed in the connection bar 310. The notch 311 is formed in a reduced cross-sectional area so that the tensile stress and the shear stress at the portion where the notch 311 is formed are made weaker than the other portions.

The notch 311 is designed to allow stress concentration to be applied to a portion where the notch 311 is formed when an impact caused by an earthquake or the like is applied as described below so that the position of the connecting bar 310 can be predicted when the connecting bar 310 is broken.

The protective means 500 is provided with a fixing portion 510, a movable portion 530, a supporting rib 533 and a stretchable and contractible portion 520. The lateral partition 540, the longitudinal partition wall 560 and the elastic cover 580 .

The fixing portion 510 is fixed to the inner wall of the underground pipe 40 by a fixing means such as an anchor 400 and the conductive core wire 120 and the lead connecting means 330 of the lead wire 100 . The fixing portion 510 is made of a hard insulator such as hard rubber.

For reference, the anchor 400 is fixed to the wall surface of the underground pipe 40. The surface of the anchor 400 may be enclosed by an insulator to prevent electric leakage due to penetration of moisture.

The movable portion 530 is made of a hard insulator such as the fixing portion 510 and has a container shape whose upper side is opened. The insertion hole 531 is formed in the bottom surface of the movable portion 530 so that the insertion wire 531 is in close contact with the outer circumferential surface of the cover 210 of the lead wire 200, And a support rib 533 extending in the longitudinal direction of the lead wire 200 may be formed.

Although not shown, a sealing member may be interposed between the inner circumferential surface of the support rib 533 and the outer circumferential surface of the sheath 210 of the lead wire 200 in order to improve the hermeticity of the insertion hole 531. [ The bonding portion 535 may be formed by applying an adhesive to the inner circumferential surface of the support rib 533 and the outer circumferential surface of the sheath 210 of the lead wire 200 or by applying heat or ultrasonic waves to melt the adhesive .

In addition, the support ribs 533 may have elasticity in a direction in which the diameter thereof is reduced, and the hermeticity may be improved by performing interference fitting of the lead wires 200 thereto.

The notch 311 of the conductor wire 220 of the lead wire 200, the lead connecting means 350 and the connecting bar 310 is disposed in the movable portion 530. That is, the notch 311 may be formed close to a portion of the connection bar 310 connected to the lead wire 200.

The stretchable and contractible portion 520 is formed to connect between the fixed portion 510 and the movable portion 530. The stretchable and contractible portion 520 is formed of an insulator having elasticity such as a soft rubber and is stretched when a tensile force is applied thereto. At this time, although not shown, a member such as a belt made of a fiber having high tensile strength may be embedded in the stretchable and contractible portion 520 to limit the stretched length.

This is to prevent the extensible portion 520 from being excessively stretched and broken and to prevent the strength of the extensible portion 520 from being lowered even when the extensible portion 520 is stretched.

The horizontal partition 540 has a flat plate shape and is installed so as to close the opened upper side of the movable unit 530 described above. As shown in the drawing, the horizontal barriers 540 are formed with connection holes 550 which are penetrated by the connection bars 310. The horizontal barrier ribs 540 may be made of a hard insulating material.

The vertical partition 560 is installed to seal the space formed by the movable portion 530 and the horizontal partition 540 by dividing the portion where the live wire is disposed and the portion where the neutral wire is disposed. The vertical partition 560 is also made of an insulator.

Accordingly, a plurality of compartments 570 are formed in the movable portion 530 by the vertical partition 560, and the compartments 570 can be hermetically sealed to the outside so as to be watertight or hermetic.

One side of the elastic cover 580 is connected to the upper surface of the horizontal partition 540 and is made of an insulator having elasticity and the other side is provided to cover the connection hole 550. The specific shape and function of the elastic cover 580 will be described below again.

Fig. 3 is a view for explaining the emergency operation of the wire connecting rod with the underground distribution line shown in Fig.

Referring to FIG. 3, as described above, when the impact due to an earthquake or the like exceeds a predetermined range, the notch 311 ruptures.

When the notch 311 ruptures, the load of the lead wire 200 is transmitted to the movable portion 530 to which the lead wire 200 is coupled. Therefore, the lead wire 200, the movable portion 530, The vertical partition 560, the elastic cover 580, and the like are transmitted. As a result, the stretchable and contractible portion 520 is stretched to move the movable portion 530 to the lower side of the installation space 41 as shown in FIG.

The underside of the connection bars 310a and 310b connected to the lead wires 100 is separated from the connection hole 550 by the movement of the movable part 530, The elastic cover 580 is returned to a shape covering the connection hole 550. [

The structure and operation of the connection hole 550 and the elastic cover 580 will be described with reference to Figs. 4 to 7. Fig.

Fig. 4 is a view for explaining the operation of the elastic cover 580 and the connection hole 550 in the safety device 1 of the wire connecting rod in the usual underground distribution line shown in Fig. 2, Sectional view taken along line AA of FIG.

4 and 5, the connecting bar 310 is arranged to penetrate through the connecting hole 550 as shown in FIG.

At this time, as described above, the elastic cover 580 is coupled to the upper surface of the horizontal partition 540 at one side, and the remaining portion is maintained elastically deformed by the connection bar 310 as shown in the figure.

On the other hand, a swelling portion 551 is formed around the portion where the connection hole 550 of the horizontal partition 540 is formed.

As shown in the drawing, the swollen portion 551 is composed of an upper stretchable surface 552, a lower stretchable surface 554, and a contact surface 555, all of which are made of an insulator having elasticity.

The upper stretchable surface 552 has a shape extending from the upper surface of the transverse bulkhead 540, in which a plurality of corrugations and a plurality of through holes 553 are formed. The lower extension surface 554 has a shape extending from the lower surface of the horizontal partition 540, and a plurality of corrugations are formed.

The wrinkles may not be formed when the material constituting the upper stretchable surface 552 and the lower stretchable surface 554 has a stretchability as high as latex.

The contact surface 555 is formed in such a shape as to connect the end of the upper side stretchable surface 552 and the end of the lower side stretchable surface 554.

A receiving space 557 is formed in the upper side stretchable surface 552, the lower side stretchable surface 554 and the contact surface 555 and the swollen material 558 is accommodated in the accommodation space 557. The swelling material 558 may have a high hygroscopicity and a material such as a superabsorbent polymer may be used as the material that increases its volume when it absorbs moisture.

As shown in FIG. 2, the swelled portion 551 having the above-described structure is maintained in a compressed state as shown in FIG. 2 when the connecting bar 310 passes through the connecting hole 550.

6 is a view for explaining an emergency operation of the elastic cover 580 and the connection hole 550 of the safety device 1 of the underground distribution line with the wire connection unit shown in FIG. BB are shown in cross section.

6 and 7, when the notch 311 described above is ruptured and the connecting bar 310a is detached from the connecting hole 550, the upper and lower stretchable surfaces 552 and 554 are compressed The connection hole 550 is closed by the extension of the swollen portion 551. [

As the elastic cover 580 is also released from the elastically deformed state, the other side is moved as indicated by a curved arrow, and the elastic cover 580 is closed by covering the connection hole 550 as shown in FIG. 3 .

The elastic cover 580 may be composed of any one or combination of at least one selected from rubber, synthetic rubber, and leather.

As described above, when water is introduced into the underground pipe 40 due to a tsunami or a flood at the same time as an earthquake or the like, the overflow water contains a large amount of foreign substances, It is very likely that short-circuit or short-circuit will occur.

The elastic cover 580 is contrived in this case and blocks water from flowing into the connection hole 550. At this time, a water-resistant adhesive may be applied to the bottom surface of the elastic cover 580 in order to improve watertightness by the elastic cover 580.

If water penetrates between the bottom surface of the elastic cover 580 and the upper surface of the transverse bulkhead 540, the moisture is absorbed by the swelling material 558 through the through holes 553, The volume of the swelling material 558 is increased and the length of the swelling portion 551 is further elongated.

The swelling portion 551 may be formed by synthesizing any one or more selected from a natural rubber material, a synthetic rubber material, an elastic plastic material, a leather material having improved elasticity, and the like. The thickness of the swollen portion 551 is set to a value selected from the range of 1 to 4 millimeters, but it is preferable that the thickness of the swollen portion 551 is 2.5 millimeters for the expansion, stable operation, and long life.

Accordingly, the water tightness of the connection hole 550 is improved by the close contact of the contact surface 555, so that water is prevented from flowing into the compartment (570 in FIG. 2) through the connection hole 550.

In addition, a plurality of slits 556 having a shape embedded in the surface of the contact surface 555 are formed. This is intended to delay the penetration of moisture by the labyrinth effect as much as possible and to prepare for the case where the submerged pipe 40 is flooded for a long time.

It is relatively preferable to constitute at least 10 syrits 556.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Other embodiments may easily be proposed by adding, changing, deleting, adding, or the like of components within the scope of the present invention, but this also falls within the scope of the present invention.

Switchboard: 10 Power distributors: 20
Ground: 30 Underground: 31
Underground piping: 40 Installation space: 41
Outgoing wire: 100 Cloth: 110
Conductor core wire: 120 Incoming wire: 200
Coating: 210 Conductor core: 220
Connector: 300 Connection bar: 310, 310a, 310b
Notch: 311 Extraction connection: 330
Incoming connection means: 350 Anchor: 400
Protection means: 500 Fixed Government: 510
Extension part: 520 Moving part: 530
Insertion ball: 531 Support rib: 533
Fused portion: 535 transverse bulkhead: 540
Connected ball: 550 Swelling part: 551
Upper stretchable side: 552 through hole; 553
Lower stretch: 554 Contact: 555
Slit; 556 Capacity: 557
Swelling substance: 558 Vertical barrier: 560
Compartment: 570 Elastic cover: 580

Claims (1)

An underground pipeline (40) embedded in the ground;
An inlet wire (200) installed in the underground pipe (40);
An outgoing wire (100) supplied with power from the incoming wire (200);
A connector 300 for electrically connecting the lead-in wire 200 and the lead-out wire 100 in the underground pipe 40; And
And protection means (500) disposed in the underground pipe (40)
The connector (300)
One end is connected to the conductor core wire 120 exposed at the end of the lead wire 100 and the other end is connected to the conductor core wire 220 exposed at the end of the lead wire 200, A connecting bar 310 formed with the notches 311 of the reduced shape;
Out connection means (330) for connecting one end of the connection bar (310) to the conductor core wire (120) of the outgoing wire (100); And
And an inlet connecting means 350 connecting the other end of the connecting bar 310 to the conductor core wire 220 of the inlet wire 200,
In the protection means 500,
A fixing part 510 fixed to the inner wall of the underground pipe 40 and disposed on the upper side of the conductor 120 and the lead connection part 330 of the lead wire 100, ,
An insertion hole 531 for inserting the lead wire 200 upward from the bottom surface is formed on the bottom surface and the conductor core wire 220 of the lead wire 200 and the lead connecting means 350 and the notch 311, A movable part 530 having a container shape of which upper side is opened and which is made of a hard insulator,
The insertion hole 531 is formed with a support rib 533 which is in contact with the outer circumferential surface of the cover 210 of the lead wire 200 and extends in the longitudinal direction of the lead wire 200,
A joint portion 535 to which the outer circumferential surface of the sheath 210 of the lead wire 200 and the inner circumferential surface of the support rib 533 are bonded or fused,
A stretchable and contractible portion 520 formed of an insulative material having elasticity and extending when the tensile force is applied is formed between the fixed portion 510 and the movable portion 530,
A transverse bulkhead 540 made of a hard insulator and having a connecting hole 550 penetrated by the connecting bar 310 to seal the opened upper side of the movable portion 530;
A plurality of compartments 570 are formed by dividing the spaces formed by the movable part 530 and the transverse partitions 540 and dividing the part where the live wire is disposed and the part where the neutral wire is disposed, Vertical barrier ribs 560 formed of silicon nitride; And
And an elastic cover 580 having one side connected to the upper surface of the transverse bulkhead 540 and made of an insulator having elasticity and the other side configured to cover the connection hole 550,
A swelling portion 551 is formed around the portion where the connection hole 550 of the horizontal partition 540 is formed,
The swelling portion 551,
An upper stretchable surface 552 formed on the upper surface of the transverse bulkhead 540 and formed of a plurality of corrugations and made of an elastic insulative material and having a plurality of through holes 553,
A lower extension surface 554 disposed below the horizontal barrier rib 540 and formed of a plurality of wrinkles and having an elastic insulation,
A contact surface 555 connecting the upper extensible surface 552 and the lower extensible surface 554 is formed,
A swelling material 558 accommodated in the accommodating space 557 formed by the upper stretchable surface 552, the lower stretchable surface 554 and the contact surface 555 and increasing in volume when absorbing moisture; In addition,
A plurality of slits 556 having an embedded shape are formed on the surface of the contact surface 555,
When the notch 311 ruptures and the connecting bar 310 is separated from the connecting hole 550, the connecting hole 550 is closed by the extension of the swollen portion 551, (Not shown)
Safety devices for underground distribution lines (1).

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