KR102310055B1 - A connecting device for low voltage underground cable - Google Patents

Abstract

The present invention enables assembly installation that selectively minimizes the protrusion of the connection tab even in a space with a narrow installation space when branching in one direction according to the branching of the underground low-voltage cable, thereby maximizing installation workability and simplifying the operator in the direction of exposure of the body after installation The convenience of providing electric detection work and improvement of fixing bolts enable quick separation with a hexagon wrench when separation is necessary after binding, so the convenience of separation work and the manufacturing cost by integral injection molding of the electric wire into the body are reduced as much as possible. An object of the present invention is to provide an underground low-voltage cable connector that can do this.
The above object of the present invention is to construct a detection unit that provides a quick detection operation from the outside of the housing on both sides of the housing side, mold a tubular cable insertion unit on the front side in one direction, and combine the outer circumferential surface of the cable in a sealed state by a detachable through-connection cap However, it can be achieved by an underground low voltage cable connection device that guarantees versatility and convenience of use by reversing and assembling to reduce the protrusion distance of the through connection cap at the entrance of the tubular cable insertion part according to the installation space.

Description

A CONNECTING DEVICE FOR LOW VOLTAGE UNDERGROUND CABLE

The present invention relates to an underground low-voltage cable connection device constituting a branch circuit of an underground cable used in an underground low-voltage line, and more particularly, a connection tab in a space with a narrow installation space when branching in one direction according to the branching of an underground low-voltage cable. Optionally, assembly installation that minimizes protrusion is possible, maximizing installation workability, guaranteeing the convenience of providing a simple electric detection operation for the operator in the exposed direction of the body after installation, and improving fixing bolts when separation is necessary after tying with a hexagon wrench It relates to an underground low-voltage cable connection device that can be quickly separated by the

In general, high-voltage power supplied from a power plant through a transmission line is branched and supplied at a low voltage from a transformer for home or industrial use.

The low-voltage cables applied at the time of low-voltage branching are connected by a connecting device for underground low-voltage cables assembled at the point where the low-voltage cables are provided for branching on the underground low-voltage line and branched to each home or industrial facility.

At this time, the connection device for the underground low-voltage cable has been disclosed in various technologies according to the number of circuits, uses, or the type of connection cable, but the most basic purpose is to configure a branch circuit at the point where the low-voltage cable is branched on the underground distribution line. and performs the function of connecting and connecting cables.

Among these low-voltage cable connection devices, the 4-circuit prefabricated underground low-voltage cable connection device is the most used.

In this 4-circuit underground low-voltage cable connection device, for example, two cable insertion parts are formed on the side of the housing, and the cable insertion part communicates with the cable insertion part on the upper part of the housing in order to bind and fix the cable conductor opened after the cable is inserted. A cable fixing part to be fastened is provided.

One of the cable insertion parts of this underground low-voltage cable connection device is used for trunk line connection, and the remaining three are used for branch line connection, that is, three branch lines (three consumers) can be connected from one unit.

Patent Literature 1 and Patent Literature 2 can be exemplified as the source technology of the connection device for such a 4-circuit underground low-voltage cable.

However, in Patent Document 1 and Patent Document 2, in order to fix the cable conductor, it is necessary to bind and use a separate connecting sleeve using a compressor. there was.

In addition, it was pointed out as a factor in the occurrence of a safety accident that is separated when the cable is pulled by an external force when the fastening of the fixing bolt that fastens the connection sleeve to maintain the connection state in the connection conductor is not strong.

Thus, as in Patent Document 3, it is possible to bind the cable conductors without the need for a connection sleeve to bind the cable conductors, providing speed of work, and ensuring the reliability by confirming the solid binding and fastening state regardless of the size of the cable. A screw compression type underground low voltage cable connector was provided.

However, Patent Document 3 has two cable insertion portions formed on both sides of the housing, so it is suitable for branching in both directions of an underground low voltage cable, but has a disadvantage in that the length is long in one direction, that is, the cable withdrawal direction is limited, and the installation space is limited.

In addition, since there is no means to directly detect electricity from the outside of the housing, the waterproof cap of the cable fixing part is separated, and the electric detection operation is only performed on the cable fixing part side through the fixing bolt connected to the conductor, so the installation direction of the housing Accordingly, there was an inconvenient disadvantage of the inspection work.

In addition, the fixing bolt screwed to the connection conductor of the cable is firstly screwed by the outer circumferential thread part, and secondarily by the screwing of the hexagonal wrench bolt screwed to the screw tab formed on the top, close binding with the cable conductor and at the same time In the state where the bolt heads of the hexagon wrench bolts were cut and combined, there was a disadvantage in that the manufacturing cost increased due to the complexity and the composition of multiple parts due to the complexity of the multiple assembly work that required assembling the waterproof cap for sealing with the outside.

In addition, the cable insertion parts provided on both sides of the housing are integrally molded with the body of the housing and cut to fit the outer diameter of the cable. However, in the case of the smallest size, the protruding distance from the side wall of the housing is long and the installation is suitable for this. If the space is not secured, the installation space is limited due to the disadvantage of sealing the cable using waterproof tape after assembling the cable cut from the large size.

1. Korea Registration Office No. 20-0209229 (Registered on Oct. 24, 2000) 2. Korea Registration Office No. 20-0431244 (Registered on Nov. 9, 2006) 3. Korean Patent No. 10-1457349 (Registered on October 28, 2014)

The present invention was developed to solve the disadvantages of the prior art as described above, and broadly speaking, the convenience and speed of dismantling of the fixing bolt according to the electric detection operation, the utility according to the installation space, and the cable separation. is to provide

That is, an object of the present invention is to provide an underground low-voltage cable connection device in which reliability is guaranteed by providing a quick electric detection operation from the outside of the housing after installation.

In addition, the present invention forms a tubular cable insertion part on the front side in one direction and combines the outer circumferential surface of the cable in a sealed state by a detachable through connection cap. An object of the present invention is to provide an underground low-voltage cable connection device that can be reassembled upside down to ensure versatility and convenience of use.

In addition, the present invention seals the tubular cable fixing part and at the same time improves the structure of the fixing bolt for pressing and fixing the conductor of the cable to the insert-bonded connecting conductor inside the housing, so that the hexagonal head tightening the sealing cap has a fastening force of a certain torque. The bolt rod binds the cable conductor to the connecting conductor by crimping it, and when separating, unscrew the bolt rod from the connecting conductor using a hexagon wrench in the hexagonal wrench groove formed on the top of the sealing cap. An object of the present invention is to provide an excellent underground low-voltage cable connector.

Underground low-voltage cable connection device according to the present invention for achieving the above object,

Insulation housing provided with a tubular cable insertion part for forming four insertion tubes on the front side and coupling the cables in an airtight state with a through connection cap thereto, and a tubular cable fixing part communicating with each of the insertion tubes to form a plurality of fixing tubes;

a conductive connection conductor that forms four cable passages communicating with the four insertion tubes, respectively, and is insert-formed inside the insulating housing;

four conductors slide-assembled in rail grooves formed on both sides of the bottom surface of each cable passage of the conductive connection conductor and protruding wedge-shaped protrusions on the top;

The conductor of the cable is pressed and fixed to the wedge-shaped protrusion of the conductor by screwing the bolt rod into the screw hole which is inserted through the respective insertion tube and machined in each cable passage of the conductive connection conductor, and at the same time, the tubular cable fixing part fixing bolts for sealing each fixing tube; and,

a ground wire connected to and drawn out from the conductive connection conductor of the insulating housing; including,

The insulation housing is characterized in that the detection unit is configured to selectively separate the detection sealing caps sealed and coupled to the detection penetration tubes configured on both sides and to enable constant detection by connection with the conductive connection conductor.

Here, the detector unit has a detector connection hole machined on both sides of the conductive connection conductor, an inner and outer circumferential concave and convex protrusions as both sides of the protruding body corresponding to the detector connection hole, and passes through the detector insertion hole and protrudes, It is characterized in that it binds to the concave-convex protrusions on the inner and outer circumferential surfaces of this probe penetration tube, and it is characterized by comprising an inner stopper and an outer cap with concave-convex protrusions on the outer circumferential surface, and a shielding cap 180 having a handle for separation.

In addition, the through-connection cap is a coupling pipe coupled to the inner circumferential surface of the insertion pipe, integrally molded into the coupling pipe to form a sealing pipe suitable for the cable outer diameter size step by step, and protrudingly molded on the front and back surfaces of the coupling pipe , the rear binding protrusion is molded,

The through-connection cap is used by assembling a rear binding protrusion of the coupling pipe in a binding ring groove formed on the inner circumferential surface of the insertion tube in a state in which the sealing tube protrudes to the outside, or the sealing tube is inserted into the insertion tube It is characterized in that by assembling it upside down so that the front binding protrusion of the coupling pipe is bound to the binding ring groove, it is configured to minimize the protrusion by eliminating the exposure of the sealing pipe.

The fixing bolt consists of a sealing cap formed by molding a hexagonal head on the upper part, binding the upper part of the bolt rod by insert molding on the lower part, and forming a sealing groove for sealing the inner and main surfaces of the tubular cable fixing part by bonding. ,

The sealing cap penetrates through the upper inner side of the hexagon head and forms a cut-out groove on the interface between the lower part of the hexagon head and the upper boundary of the sealing cap in a state in which a hexagonal wrench groove formed on the upper side is molded, so that the hexagon head is applied to the fastening force of a certain torque. It is characterized in that the bolt rod is crimped and fixed to the conductor of the cable by cutting and separation by the perforation groove, and the bolt rod can be separated from the connecting conductor by unscrewing it using a hexagon wrench through the hexagon wrench groove during separation.

The ground wire is integrally molded by insert molding into the insulating housing in a state in which the conductor is inserted and bound into the connection groove machined on the front surface of the conductive connection conductor so as to be drawn out toward the tubular cable insertion part.

According to the present invention, even after the installation of the fixed state of the housing, it is possible to easily perform an electric detection at all times when electric detection is required, thereby ensuring convenience and productability.

In addition, according to the present invention, there is an effect that the versatility is guaranteed by eliminating the limitation of the installation space according to the on-site construction as much as possible.

In addition, according to the present invention, there is an effect that the reliability of the product is ensured by not only strong binding by screwing the fixing bolt for binding the conductor of the cable, but also easy separation operation.

In addition, according to the present invention, there is an advantage that the manufacturing cost can be reduced by integrally molding the grounding wire into the housing by insert molding.

Further, according to the present invention, the effect of mass production can be expected industrially by simplification of component parts, and it becomes possible to provide it at a low cost.

1 is a perspective view showing the appearance of the present invention before use.
Fig. 2 is a plan view of the invention according to Fig. 1;
3 is a partially cut and exploded perspective view of the tubular cable insertion part and the tubular cable fixing part, which are constituent parts of the present invention.
Figure 4 is a side cross-sectional view of the present invention, a cross-sectional view of the through-connection cap and the fixing bolt separated state.
FIG. 5 is a frontal cross-sectional view taken along line IV-IV' of FIG. 2 .
FIG. 6 is a frontal cross-sectional view viewed from the line V-V' of FIG. 2 .
FIG. 7 is a lateral cross-sectional view taken along the line VI-VI' of FIG. 2 .
FIG. 8 is an enlarged view excerpted from part “F” of FIG. 6 .
9 is a cross-sectional view showing a cable assembly to which a through-connection cap is coupled according to an exemplary embodiment of the present invention.
10 is a cross-sectional view showing a cable assembly to which a through-connection cap is coupled according to another usage example of the present invention.

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

Fig. 1 is a perspective view showing the appearance of the present invention before use, Fig. 2 is a plan view of the present invention, and Fig. 3 is a partially cut-away perspective view by separating the through-connection cap and the fixing bolt, which are components of the present invention.

Referring to these drawings, the underground low-voltage cable connection device according to the present invention is used for branch connection of underground low-voltage cables (hereinafter abbreviated as 'cables') as already known, and the branch-connected cable (C) has an outer sheath. It is used for the purpose of branching by fastening the exposed cable conductor (C-1) by opening it.

Looking at the configuration of the present invention broadly,

The tubular cable insertion part 110 and each of the insertion tubes for forming the four insertion tubes 120 on the front side and coupling the cables (C) inserted by the through connection caps 150 coupled thereto in an airtight state. Insulation housing 100, which is in communication with 120 and provided with a tubular cable fixing part 130 in which a plurality of fixing pipes 140 are molded, and molded into an integral structure by insulating rubber or insulating plastic;

A conductive connection conductor 200 bound to the inside of the insulating housing 100 by insert molding and having four cable passages 210 communicating with the four insertion tubes 120, respectively;

A fixing bolt 300 for crimping and fixing the conductor C-1 of the cable C by screwing it into the screw hole 220 machined in the vertical direction by coupling through the fixing pipe 140 of the tubular cable fixing part 130 ) is included.

4 is a cross-sectional view showing the separation state of the through connection cap 150 and the fixing bolt 300 of the present invention, the through connection cap 150 coupled to the tubular cable insertion part 110 is the insertion tube 120 of the present invention. The coupling pipe 151 coupled to the inner circumferential surface is integrally molded with the coupling pipe, and the sealing pipe 152 having a step diameter according to the outer diameter size of the cable (C) and a closed end is molded.

The coupling tube 151 has front and rear binding protrusions 153 and 154 protrudingly formed on the front and rear sides thereof, and each is selectively coupled to the binding ring groove 121 formed on the inner circumferential surface of the insertion tube 120, that is, Thus, when the sealing tube 152 is coupled to the outside of the insertion tube 120 in a state where it is exposed, the rear binding protrusion 154 is bound, and on the contrary, the sealing tube 152 is connected to the insertion tube 120 of the insertion tube 120 . When coupled in a state accommodated therein, the front binding protrusion 153 is bound to suppress forcible separation.

On the other hand, the through connection cap 150 is assembled with the tip of the sealing tube 152 blocked before use, and blocks the penetration of foreign substances into the insulation housing 100 through the four insertion tubes 110 during storage. The state of assembling the coupling tube 151 to the insertion tube 110 in the state that it is stored in one state, and is inserted into the outer circumferential surface of the cable (C) by cutting a diameter part that matches the outer diameter of the cable (C) when in use is installed with

That is, in the present invention, the cable C is branched through the tubular cable insertion part 110 formed in one direction on the front side of the insulating housing 100 , and the tubular cable fixing part formed on the upper side of the insulating housing 100 . The bolt rod 320 of each fixing bolt 300 of 130 descends by screwing in a state in which it is screwed with the screw hole 220 of the conductive connection conductor 200 to the inside of the conductive connection conductor 200. It is installed in a state in which each accommodated cable conductor (C-1) is firmly fixed.

Of course, the present invention is, as shown in FIG. 9, the sealing tube ( 152) is generally installed in an exposed state,

As shown in FIG. 10 , when the installation space of the present invention is narrow, the assembly direction of the through-connection cap 150 coupled through the insertion tube 120 is reversed so that the sealing tube 152 is not exposed. By minimizing the protrusion distance of the state, the cable (C) can be branched.

And when the outer diameter of the cable (C) matches the inner diameter of the coupling tube 152, the front portion of the front coupling protrusion 152 of the coupling pipe 151 is cut and assembled on the inner circumferential surface of the insertion tube 120. The opening portion of the insertion tube 120 is hermetically sealed in a state in which the sealing tube 152 is withdrawn without exposing the cable (C).

In addition, when the outer diameter of the cable (C) has a diameter that fits the inner circumferential surface of the insertion tube (120), the cable (C) can be inserted and branched without using the through connection cap (150).

Here, on the inner peripheral surface of the insertion tube 120 of the tubular cable insertion unit 110 and the inner peripheral surface of the coupling tube 151 and the sealing tube 152 of the through-connection cap 150, a plurality of irregularities for enhancing airtightness, respectively The projections 122 and 155 are molded, respectively.

The concavo-convex projection 122 of the insertion tube 120 has a function of increasing the airtightness with the outer circumferential surface of the coupling tube 151 of the through-connection cap 150 or with the outer circumferential surface of the cable C, and the The concave-convex projections 155 respectively formed on the inner peripheral surfaces of the coupling pipe 151 and the sealing pipe 152 of the through-connection cap 150 have a function of increasing airtightness with the outer circumferential surface of the cable (C).

With further reference to the front cross-sectional view of FIGS. 5 to 6 and the side cross-sectional view of FIG. 7 , the conductive connection conductor 200 which is a component of the present invention has the four cable passages communicating with the four insertion tubes 120 , respectively. In 210, four conductors 250 projecting a plurality of wedge-shaped projections 260 on the upper side through rail grooves 230 formed on both sides of the bottom surface are slide-assembled in the insulating housing 100 inside. It is bound by insert molding.

Such a conductor 250 is inserted through each insertion tube 120 of the tubular cable insertion unit 110 as disclosed in Patent Document 3, which is a pre-registered patent of the present applicant, the cable conductor (C-) of the cable (C). 1) to keep the connection in the firmly connected state.

That is, the bolt rod 320 of the fixing bolt 300 screwed to the screw hole 220 of the conductive connection conductor 200 is lowered by screwing, and the cable conductor inserted into each cable passage 210 at the same time. (C-1) is tightly fastened with a plurality of wedge-shaped protrusions 260 digging into it to maintain a firm fastening.

The fixing bolt 300 forms a hexagonal head 330 in the upper part, binds the upper part of the bolt rod 320 to the lower part by insert molding, and the inner body in the upper part of the fixing pipe 140 of the tubular cable fixing part 130 A sealing cap 310 formed to seal the inner and outer circumferential surfaces of the fixing tube 140 with a sealing groove 340 by an outer skirt 312 bent downward from the upper side of the 311 while wrapping and sealing is constituted. do

At this time, in order to increase the airtightness with the outer circumferential surface of the inner body 311 of the sealing cap 310 on the inner circumferential surface of the fixing tube 140 of the insulating housing 100, a plurality of concavo-convex projections 141 are molded to increase airtightness. have.

And the sealing cap 310 passes through the upper inner side of the hexagonal head 330 to form a hexagonal wrench groove 350 on the upper side of the inner body 311, and the lower part of the hexagonal head 330 and the sealing A cut-out groove 360 is formed on the upper boundary surface of the cap 310 . Accordingly, the hexagonal head 330 is cut and separated by the cut-out groove 360 while the bolt rod 320 presses and fixes the cable conductor C-1 of the cable C by the fastening force of a constant torque.

When the fixing bolt 300 fixed in this way is separated, when the branch-connected cable (C) is separated, the bolt rod ( 320 can be easily separated by unscrewing from the screw hole 220 of the conductive connection conductor 200 .

On the other hand, in the present invention, as shown in the enlarged view of FIG. 8 , the insulated housing 100 has a detector insertion hole 171 penetrating the inside on both sides of the insulated housing 100 , which is sealed and coupled to a detector penetration tube 170 . The electric detection unit 160 is configured to selectively separate the cap 180 and to enable constant electric detection by connection with the conductive connection conductor 200 .

At this time, the detector connection hole 271 is processed on both sides of the conductive connection conductor 200 to correspond to the detector insertion hole 171 of the detector penetration tube 170 .

Here, the detector 160 is a detector connection hole 271 machined on both sides of the conductive connection conductor 200, and the inner and outer circumferential projections 273 and 274 as both sides of the protruding body 172 corresponding to the detector connection hole. ), penetrates the detector insertion hole 171 and protrudes, and binds to the inner and outer peripheral surface uneven projections 273 and 274 of this detection penetration tube, and an inner stopper formed with uneven projections 183 on the outer peripheral surface 181 and the outer cap 182 are molded, and a handle 184 for separation is formed of the electric detection sealing cap 180 .

Therefore, in the present invention, even in a state in which the insulation housing 100 is fixed and installed, the convenient side of the detection sealing caps 180 assembled on both sides is separated from the detection penetration tube 170 when the detection operation is required, and the detector insertion hole 171 ) by using a detector (not shown) through the connection to the detector connection hole 271 of the conductive connection conductor 200, it is possible to perform a regular electric detection operation.

As shown in FIG. 7 , in the present invention, the ground wire 400 is connected to the conductive connection conductor 200 of the insulating housing 100 to protect the line equipment by discharging an abnormal voltage to the ground for safety of use.

The ground wire 400 is insert-molded in the insulating housing 100 in a state in which the conductor is inserted and bound into the connection groove 270 machined on the front side of the conductive connection conductor 200 so as to be drawn out toward the tubular cable insertion part 110 side. is made of one-piece molding.

By forming the ground wire 400 at once in a state in which it is inserted into the insulating housing 100 and bound to the conductive connection conductor 200, the manufacturing cost can be significantly reduced compared to the connection by a separate assembly structure. there are advantages to

The use of the present invention will be described with reference to FIGS. 9 and 10 as follows.

First, in a state in which the through-connection cap 150 assembled to the tubular cable insertion part 110 of the insulating housing 100 is separated, the cable (C) that connects and branches is opened to expose the cable conductor (C-1) at a certain distance insert in the state of

At this time, cut the sealing pipe 152 or the coupling pipe 151 of the through connection cap 150 suitable for the outer diameter of the cable (C), and connect the cable conductor (C-1) with the outer diameter of the cable (C). It is inserted through the insertion tube 120 , and the through-connection cap 150 is inserted into the inner circumferential surface of the insertion tube 120 .

The cable conductor (C-1) of the cable (C) inserted in this way is positioned above the wedge-shaped projection 260 of the conductor 250, and the waterproof cap 130 sealing the tubular cable fixing part 130 is installed. Separate and lower the bolt rod of the fixing bolt 300 screwed into the screw hole 220 of the connection conductor 200 by rotating the hexagon head 330 to lower the cable passage 210 of the conductive connection conductor 200. ) to the wedge-shaped protrusion 260 of the conductor 250 assembled in the process of firmly fastening by crimping, each cable (C) is branch-connected.

At this time, when the fixing bolt 300 continues to rotate in a fully assembled state, the bolt rod 320 is in close contact with the conductor C-1 of the cable C, and the hexagonal head is formed by the fastening force of a constant torque by the repulsive load. 330 is cut off from the sealing cap 310 by the cut-out groove 360 and separated.

In this state, the fixing bolt 300 according to the separation of the cable (C) raises the bolt rod 320 that was pressed by loosening the screw using the hexagon wrench groove 350 of the sealing cap 310, and the insertion tube ( 120) can be separated.

In addition, in the present invention, after installation by the above-described process, when the detection is necessary, as described above for the detection unit 160, the detection sealing cap 180 is separated from the detection penetration tube 170 and the detection electrode insertion hole ( 171) by using a detector (not shown) has the advantage of being able to perform a regular electric detection operation by connecting to the detector connection hole 271 of the conductive connection conductor 200 .

Various changes and modifications are possible within the spirit and scope of the claims claimed as the subject matter of the present invention described above.

100: insulation housing 110: tubular cable insertion part
120: insertion tube 121: binding ring groove
122, 141, 155, 183, 273, 274: bumps
130: tubular cable fixing unit 140: fixed pipe
150: through connection cap 151: coupling pipe
152: sealing tube 153: front binding projection
154: rear binding projection 160: sword section
170: Detector penetration 171: Detector insertion hole
172: protruding body 180: electric detection sealing cap
181: inner stopper 182: outer cap
184: handle 200: conductive connection conductor
210: cable passage 220: screw hole
230: rail groove 250: conductor
260: wedge-shaped projection 270: connection groove
271: detector connection hole 300: fixing bolt
310: sealing cap 311: inner body
312: outer skirt 320: bolt rod
330: hexagonal head 340: sealing groove
350: hexagon wrench groove 360: cut-out groove
400: ground wire C: cable

Claims (1)

A coupling tube that is molded on the front side and coupled to the inner circumferential surface of the insertion tube, a sealing tube that is integrally molded with this coupling tube to fit the cable outer diameter size is molded step by step and protrudes on the front and rear surfaces of the outer circumferential surface of the coupling tube The molded front and rear binding projections are molded, and the sealing tube protrudes to the outside and is assembled into the binding ring groove formed on the inner circumferential surface of the insertion tube as the rear binding projection of the coupling tube, or the sealing tube is the Tubular cable insertion part for assembling upside down so as to be inserted into the insertion tube, the front binding protrusion of the coupling tube is bound to the binding ring groove, thereby coupling the cable in an airtight state with a through-connection cap that minimizes the protrusion by eliminating the exposure of the sealing tube and an insulation housing provided with a tubular cable fixing part communicating with each of the insertion tubes to form a plurality of fixing tubes, and forming four cable passages communicating with the four insertion tubes, respectively, and inserting an insert inside the insulation housing a conductive connection conductor that becomes a conductive connection conductor, four conductors slide-assembled in rail grooves formed on both sides of the bottom surface of each cable passage of the conductive connection conductor and protruding wedge-shaped projections on the upper portion, and the conductive connection is inserted through each of the insertion tubes Fixing bolts for pressing and fixing the conductor of the cable to the wedge-shaped projection of the conductor by tightening the bolt rod into the threaded hole machined in each cable passage of the conductor and at the same time sealing each fixing tube of the tubular cable fixing part and the insulation housing A ground wire integrally molded by insert molding in an insulating housing in a state in which the conductor is inserted and bound into the connection groove machined on the front surface of the conductive connection conductor so as to be connected to the conductive connection conductor and drawn out toward the tubular cable insertion part, Detector connection hole machined on both sides of the conductive connection conductor, and the detector penetration tube protruding through the detector insertion hole with inner and outer circumferential concavo-convex projections as both sides of the protruding body corresponding to the detector connection hole; It binds to the concave-convex protrusions on the inner and outer circumferential surfaces and molds the inner stopper and outer cap with concavo-convex protrusions on the outer circumferential surface, and a handle for separation is molded. In the underground low-voltage cable connection device comprising an electric detection unit that selectively separates one electric detection sealing cap and enables constant electric detection by connection with the conductive connection conductor,
The fixing bolt forms a hexagonal head in the upper part, binds the upper part of the bolt rod to the lower part by insert molding, and forms a sealing groove for sealing the fixing tube of the tubular cable fixing part by the inner body and the outer skirt. The sealing cap is composed of
The sealing cap penetrates through the upper inner side of the hexagonal head and forms a cut-out groove on the interface between the lower part of the hexagonal head and the upper boundary of the sealing cap in a state in which a hexagonal wrench groove is formed on the upper side of the inner body so that the hexagonal head is tightened with a constant torque. It is characterized in that the bolt rod is crimped and fixed to the conductor of the cable by cutting and separation by the cutout groove by the Underground low voltage cable splicing device.

Images