KR20220130474A - Connection device of underground low pressure cable - Google Patents

Abstract

According to the present invention, disclosed is a connection device of an underground low pressure cable which changes a connection of an underground low pressure cable to a tightening method by a bolt rather than a compression method by a sleeve so as to reduce work time and construction costs by simplifying work processes. The connection device of an underground low pressure cable comprises: a connection body (100) for inputting a cable to an inner accommodation space unit to accommodate it; a fixing unit for fixing the cable inputted to the accommodation space unit of the connection body (100); and a connecting material (10) for granulation, wherein the fixing unit has a connection bolt (200) coupled to the connection body (100) to pressurize the cable to limit separation.

Description

Connection device of underground low voltage cable {CONNECTION DEVICE OF UNDERGROUND LOW PRESSURE CABLE}

The present invention relates to a connection device for electrically connecting an underground low-voltage cable, and more particularly, to a connection device for an underground low-voltage cable capable of implementing the connection of the cable by a bolt tightening method instead of a sleeve compression method.

In general, the electrical connection to the underground low voltage cable is made through the following process.

First, fix the connection body to the mounting surface such as a wall, cut the connection tab according to the usage standard, and then insert it into the end of the cable with grease, a waterproof coating agent, applied inside.

Then, after cutting the cable to the length for easy connection, the sheath is peeled off by an appropriate length from the end of the cut cable, assembled with the sleeve for connection, and then connected to the end of the cable by crimping it using a crimping machine The sleeve is firmly fixed.

Then, remove the closing cap from the inlet of the connection body and then loosen the fixing bolt to facilitate the insertion of the connection sleeve.

Then, the cable pressed at the end of the sleeve for connection is completely pushed into the inlet of the connection body, and then the fixing bolt is tightened.

Finally, the connection work is completed by applying grease to the insertion part of the connection tab and the closing cap and then firmly inserting the connection tab and the closing cap by pushing them.

In the conventional connection work of the underground low-voltage cable made in this way, it is necessary to perform a compression operation for fixing the connection sleeve to the end of the cable as well as the peeling operation of the covering part to the end of the cable. There is a disadvantage that a lot of work time is required, and this disadvantage causes a problem of lowering economic efficiency by increasing the construction cost for connection work.

In addition, in the connection work of the conventional underground low-voltage cable as described above, the crimping process of the connection sleeve at the end of the cable causes many differences in degree of perfection depending on the skill level of the operator. In addition to making it impossible to guarantee the perfect watertight effect, it may cause electric leakage and electric shock accidents due to the penetration of moisture. Therefore, a fundamental countermeasure for this is required.

The technical problem to be solved by the present invention is to simplify the work time and work process by changing the connection of the underground low-voltage cable to a tightening method by a bolt instead of a compression method by a sleeve. to provide the device.

Another technical problem to be solved by the present invention is to provide a connection device for an underground low-voltage cable that can secure a certain level or more of assembly quality regardless of the skill of the operator by changing the connection of the underground low-voltage cable to a fastening method by a bolt. .

The present invention for solving the above technical problems is a connecting device for a low-voltage underground cable having a connecting material for a standing for electrical connection to the underground low-voltage cable, wherein the connecting material for the standing is a receiving space portion inside the cable It includes a connection body for receiving and inserting into the connection body, and a fixing part for fixing the cable introduced into the receiving space of the connection body, wherein the fixing part is fastened to the connection body and has a connection bolt for limiting separation by pressing the cable characterized in that

In an embodiment of the present invention, the connection body is provided with a wire lead-in part and a wire lead-out part that enable each of the lead-in side cable and the lead-out-side cable to be individually inserted among the cables, wherein the wire lead-in part and the wire lead-out part are the connecting parts. It is characterized in that it is provided in a plurality of quantities at the portions facing each other with respect to the body.

In an embodiment of the present invention, the connection body includes a rigid structure for setting an accommodation space therein to receive the cable retractably, and peeling the covering portion of the cable that is installed inside the rigid structure to enter the cable. It is characterized in that it includes a cut-out structure that conducts electricity with the conductor, and the rigid structure is configured so that the outside is surrounded by an insulating structure.

In an embodiment of the present invention, the insulating structure and the rigid structure have a bolt inlet hole for fastening with the connecting bolt, and the bolt inlet hole has a corresponding thread on the inner circumferential surface for fastening with the connecting bolt. characterized by being

In an embodiment of the present invention, the cut-out structure is characterized in that it has a body portion coupled to the rigid structure, and a cutting portion protruding from the body portion toward the interior of the accommodation space.

In an embodiment of the present invention, the body portion has an inclined surface extending in the axial direction with a reduced cross-sectional area toward the cutting portion on both side surfaces, and the rigid structure has a reduced cross-sectional area toward the inner side for axial assembly with the inclined surface It is characterized in that it is provided with an insertion groove extending in the axial direction.

In an embodiment of the present invention, the cutting part is characterized in that it is provided with a plurality of blade structures extending long toward the assembly direction of the cut-out structure for the rigid structure.

In an embodiment of the present invention, the plurality of blade structures are characterized in that they are arranged in parallel along the assembly direction of the cut-out structure with respect to the rigid structure.

In an embodiment of the present invention, the connection bolt includes a bolt body in which a thread is formed along an outer circumferential surface, and a breakable bolt head connected to one side of the bolt body, wherein the breakable bolt head is one side of the bolt body It is characterized in that it comprises a first bolt head connected to, and a second bolt head that is detachably connected to the first bolt head through a breaking part as a medium.

In an embodiment of the present invention, the granular connecting material has the connecting body in a quantity of at least two or more, and the connecting main bodies having a quantity of two or more are connected in parallel with each other so that a plurality of wire inlet and wire lead out parts are connected to the connecting body. It is characterized in that it is configured to be disposed at positions opposite to each other.

An embodiment of the present invention further comprises a closing cap which is respectively fastened to the wire lead-in and wire lead-out part of the connection body to airtightly penetrate and receive the incoming-side cable and the out-side cable respectively, and the closing cap is the cable. It is characterized in that it is configured in a hollow shape to penetrate and accommodate the inner axial direction.

In an embodiment of the present invention, a waterproof coating agent is applied to the inside of the closing cap to block the internal inflow of fluid through the wire inlet and the wire lead out of the connection body.

The connection device of the underground low-voltage cable according to the embodiment of the present invention can electrically connect the cable using a bolt tightening method instead of a sleeve compression method, thus greatly reducing the work time and work process required for cable connection. This can provide the effect of greatly reducing the cost required for the connection work of the cable.

That is, in the present invention, in the electrical connection work for the underground low-voltage cable, the removal process for the covering part of the cable and the crimping process between the cable and the sleeve, which were performed in the conventional crimping method using the sleeve, are respectively abolished, while the bolt Since it is possible to electrically connect the cables by the fastening method, the workability can be greatly improved.

In addition, the present invention provides the effect of ensuring the assembly quality of a certain level or more regardless of the skill of the operator as the electrical connection to the underground low-voltage cable is changed to the tightening method by the bolt.

1 is a perspective view showing the overall external configuration of the connection device of the underground low-voltage cable according to an embodiment of the present invention.
FIG. 2 is a perspective view showing only the connecting material for standing in the connecting device of the underground low-voltage cable shown in FIG. 1. FIG.
FIG. 3 is a cross-sectional view illustrating the internal structure of the standing connecting member shown in FIGS. 1 and 2 , respectively.
FIG. 4 is a view schematically illustrating a state in which a cable is assembled into an accommodating space located inside the connecting member for standing shown in FIG. 3 .
5 is a cross-sectional view for explaining a state in which the cable assembled inside the connecting member for standing shown in FIG. 3 is electrically energized through the rigid structure of the connecting body.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to intentions or customs of users and operators. Therefore, definitions of these terms should be made based on the content throughout this specification. In addition, the following embodiments do not limit the scope of the present invention, but are merely exemplary matters of the components presented in the claims of the present invention, and are included in the technical spirit throughout the specification of the present invention and constitute the scope of the claims Embodiments including substitutable elements as equivalents in elements may be included in the scope of the present invention.

Referring to Figure 1, the connection device of the underground low-voltage cable according to the embodiment of the present invention is provided with a connecting member 10 for a standing for electrically connecting the underground low-voltage cable. The underground low-voltage cable electrically connected by the standing connecting material 10 can be largely divided into an incoming-side cable and an outgoing side cable. It will be referred to collectively as

In addition, the standing connecting member 10 is installed in a structure that is firmly fixed to the support 20 fixed to the mounting surface, such as a wall. In this case, the support 20 serves to firmly fix the connecting member 10 for the standing to the front part exposed to the outside in a state where it is fixed to the mounting seat surface, such as a wall. That is, the support 20 is a member corresponding to a kind of mounting bracket.

In addition, the connecting material for the standing 10 is a connection body 100 for accommodating the underground low-voltage cable by inserting it into the accommodating space inside, and the cable in for the accommodating space located inside the connection body 100 . It is configured to include a fixing part to be fixed. In this case, the connection body 100 may be firmly coupled to the support 20 as a coupling structure such as a screw fastening method.

On the other hand, the fixing part is provided with a connection bolt 200 that is coupled to the hole formed on the outer surface of the connection body 100 by a screw fastening method to limit the cable separation. In particular, the connection bolt 200 is configured to artificially restrain the external departure of the cable from the connection body 100 by pressing the cable introduced into the receiving space inside when fastening with the connection body 100 . .

1 and 2, in the connecting device of the underground low-voltage cable according to an embodiment of the present invention, the connecting member 10 for the standing is provided with the connecting body 100 in an amount of at least two or more, 2 The plurality of connection bodies 100 are configured to be coupled in parallel to each other.

In addition, as shown in FIG. 2 , the connection body 100 includes a wire lead-in part 110 and a wire lead-out part 120 that enable each of the lead-in side cable and the lead-out-side cable to be individually inserted among the cables. . Preferably, the connection body 100 may be configured such that the wire lead-in part 110 and the wire lead-out part 120 are respectively disposed at positions opposite to each other. In addition, it will be more preferable that the wire lead-in part 110 and the wire lead-out part 120 are provided in a plurality of quantities for a single connection body 100 .

In this case, the wire lead-in portion 110 is provided in a plurality of quantities on one side of the connection body 100 to serve as an inlet-side insertion portion that enables the insertion of the lead-in-side cable. In addition, the wire lead-out part 120 is provided in a plurality of quantities with respect to the other side of the connection main body 100 to perform the role of the lead-out-side insertion part that enables the lead-out-side cable to be inserted.

Referring to FIG. 3 , the connection body 100 includes an insulating structure 130 corresponding to a casing, a rigid structure 140 positioned inside the insulating structure 130 , and the inside of the rigid structure 140 . It is configured to include a cut-out structure 150 installed in the receiving space located in the.

The insulating structure 130 is a member corresponding to the outer shell constituting the casing of the connection body 100 , and has a structure for accommodating the rigid structure 140 and the cut-out structure 150 therein. In particular, it is more preferable that the insulating structure 130 be made of an insulating material that can be electrically insulated.

The rigid structure 140 is a member for accommodating a cable in a retractable manner, and has a structure in which an accommodating space for cable entry of an appropriate volume is formed therein. In addition, the rigid structure 140 has a bolt inlet hole for fastening with the connecting bolt 200 , and the bolt inlet hole has a corresponding thread formed on the inner circumferential surface for fastening with the connecting bolt 200 . is made of In particular, the bolt inlet hole is formed to pass through the insulating structure 130 and the rigid structure 140 at the same time, and is configured to promote a screw fastening method with the connection bolt 200 .

The cut-out structure 150 is a member installed with respect to the accommodation space of the rigid structure 140 , and serves to peel off the covering portion of the cable leading into the accommodation space located inside the rigid structure 140 . In addition, the cut-out structure 150 may be detachably installed in the receiving space of the rigid structure 140 .

In this case, the cut-out structure 150 presses the covering portion of the cable in the vertical direction through the connection bolt 200 fastened to the connection body 100 in peeling the covering portion of the cable leading into the receiving space portion. It may be configured to peel the covering part or to peel the covering part by direct contact with the covering part of the cable entering the interior of the accommodation space depending on its own blade structure such as a cutting part to be described later. In particular, the cut-out structure 150 is a conductive material and is made of a material that can be electrically energized through contact with the conductor part of the cable.

To this end, the cut structure 150 is configured to include a body portion 151 coupled to the rigid structure 140 , and a cutting portion 152 protruding from the body portion 151 toward the inside of the accommodation space. do.

In this case, the body portion 151 of the cut-out structure 150 is provided with an inclined surface 151a extending in the axial direction with a reduced cross-sectional area toward the cutting portion 152 on both sides, and the rigid structure 140 is The cross-sectional area is reduced toward the inner side for axial assembly with the inclined surface 151a and is configured to include an insertion groove 140a extending in the axial direction. Accordingly, the cut-out structure 150 can be prevented from departing from the receiving space located inside the rigid structure 140 in the radial direction, and the axial entry toward the inside of the rigid structure 140 during the assembly process. can be guided.

In addition, the cutting portion 152 may be configured in the form of a plurality of blade structures extending long toward the assembly direction in the axial direction of the cut-out structure 150 with respect to the rigid structure 140 . Of course, this is limited when the assembly direction of the cut-out structure 150 with respect to the rigid structure 140 is set to be the same as the incoming direction of the cable toward the receiving space of the rigid structure 140 .

In addition, it is preferable that the plurality of blade structures provided in the cutting unit 152 are arranged in parallel along the assembly direction of the cutting structure 150 with respect to the rigid structure 140 , and in particular, the cutting unit ( 152) of the plurality of blade structures constituting the at least one blade structure that can restrain the deviation of the cable in the opposite direction through the imprinting with the covering portion of the cable introduced toward the inside of the receiving space of the rigid structure 140 It will be more preferable that a barb portion (not shown) is provided.

4 and 5, when the lead-in of the cable 300 is made into the inside of the rigid structure 140 through the wire lead-in part 110 or the wire lead-out part 120 of the connection body 100, Since the covering part 310 of the cable 300 is cut and peeled through contact with the cutting part 152 of the cut-out structure 150 , the conductor part 320 located inside the covering part 310 ) comes into contact with the cutting part 152 .

As a result, an electrical conduction state can be implemented between the cut-out structure 150 and the conductor part 320 of the cable 300 . That is, when the cable 300 is drawn into the inside of the connection body 100 through the wire lead-in part 110 or the wire lead-out part 120 , the covering part 310 of the cable 300 is cut-out structure 150 . Since it can be peeled off through contact with the cutting part 152 of the cable 300 , the conductor part 320 of the cable 300 is converted into a state capable of electrically conducting with the cut-out structure 150 .

In this process, the connection bolt 200 is coupled to the connection body 100 by a screw fastening method, thereby generating electricity between the conductor part 320 of the cable 300 and the cutting part 152 of the cut-out structure 150 . A negative energization state can be promoted. That is, since the connection bolt 200 can radially press the covering part 310 of the cable 300 toward the cutting part 152 of the cut-out structure 150 , the peeling of the covering part 310 is promoted. The electric current between the conductor part 320 of the cable 300 and the cutting part 152 of the cut-out structure 150 can be made more smoothly through this.

In conclusion, the connecting device of the underground low-voltage cable according to the embodiment of the present invention electrically connects the inlet side cable and the outgoing side cable using the upright connecting material 10, respectively, leading to the inside of the connecting body 100. Since the cable may be inserted in its original state without peeling the covering part as in the prior art, it is possible to exclude the operation process of peeling the covering part of the cable and pressing the sleeve compared to the conventional cable connection device.

Referring to FIG. 5 , the connection bolt 200 is a bolt body 210 in which a thread is formed along an outer circumferential surface for coupling with a screw fastening method with the connection body 100 , and from one side of the bolt body 210 . A breakable bolt head 220 is provided to be integrally connected.

In this case, the breakable bolt head 220 is a first bolt head 221 formed to be integrally connected from one side of the bolt body 210, and a breaking part for the first bolt head 221 as a medium. It is formed to be integrally connected and is configured to include a second bolt head 222 that can be artificially separated from the first bolt head 221 through the destruction of the fractured portion when an external force greater than a specified torque is applied.

The reason that the connection bolt 200 has a breakable bolt head 220 having a breakable structure is the connection body in the process of electrically connecting the inlet side cable and the outgoing side cable using the standing connecting material 10 . In fastening the connection bolt 200 with respect to 100, when an external force greater than the prescribed torque is applied using a hand tool, the second bolt head 222 of the breakable bolt head 220 is the first It is broken from the bolt head 221 and can be separated, and through this, the operator visually recognizes the connection bolt 200 in a state where only the first bolt head 221 remains, and distinguishes it from the connection bolt 200 in a normal state. can be performed more easily.

As a result, the underground low-voltage cable connection device according to the embodiment of the present invention can limit the repetitive performance of the electrical connection work between the incoming cable and the outgoing side cable using the standing connecting material 10 . That is, it is possible to prevent the recycling of parts that may be involved as the cable 300 is reassembled with respect to the connection body 100 using the connection bolt 200 in a state where only the first bolt head 221 remains. , through this, it is possible to fundamentally solve the problem of lowering the watertightness of the connecting member 10 for standing.

Referring to FIG. 2 , in the connection device of the underground low-voltage cable according to the embodiment of the present invention, the fixing part is the wire lead-in of the connection body 100 in order to limit the inflow of fluid into the interior of the connection body 100 . It may be configured to further include a closing cap 400 that is respectively fastened with respect to the part 110 and the wire lead-out part 120 to airtightly penetrate and receive the inlet-side cable and the lead-out-side cable respectively. That is, the closing cap 400 is a member covered to surround the outside of the cable inserted through the wire lead-in part 110 and the wire lead-out part 120 of the connection body 100, and is watertight for the connection part of the cable. It plays a role in implementing the effect. To this end, the closing cap 400 will preferably be configured in a hollow shape for accommodating the cable through the inner axial direction.

In addition, it is more preferable that a waterproof coating agent is applied to the inside of the closing cap 400 to more effectively block the internal inflow of the fluid through the wire inlet 110 and the wire lead 120 of the connection body 100 . something to do.

In particular, it will be more preferable that a watertight structure in the form of a labyrinth is added to the inside of the closing cap 400 to more effectively block the inflow of the fluid from the outside.

Therefore, the present invention configured as described above is the wire lead-in part 110 of the connection body 100 in a state where the coating part 310 for the end of the cable 300 is not peeled off and removed during the connection operation of the underground low-voltage cable. and the wire lead-out part 120, respectively, the covering part 310 of the cable 300 is peeled off and torn by the cutting part 152 of the cut-out structure 150, and the connection bolt 200 Since a closer electrical connection can be made between the conductor part 320 of the cable 300 and the cut-out structure 150 by the pressing force provided from the bolt body 210 during fastening, it is necessary for the connection work of the conventional cable. It is possible not only to abolish the process of crimping the sleeve for connection to the end of the cable, but also to eliminate the process of peeling and removing the coating from the end of the cable.

As a result, the present invention provides the effect of significantly reducing the work process and work time compared to the conventional cable connection work, and the effect of reducing the cost required for the work process, and above all, the end of the cable Since the pressing process of the sleeve for connection to the part can be abolished, it has the advantage of securing the assembly quality above a certain level regardless of the skill level of the operator.

10-Standing splice 20-Support
100-connection body 110-wire entry
120-wire lead-out 130-insulation structure
140-rigid structure 140a-insertion groove
150-incision structure 151-body part
151a - slope 152 - cut
200-connection bolt 210-bolt body
220-breakable bolt head 221-first bolt head
222 - 2nd bolt head 300 - cable
310 - sheath 320 - conductor
400 - Closing Cap

Claims (12)

In the connection device of the underground low-voltage cable having a connecting material for a standing for electrical connection to the underground low-voltage cable,
The connecting material for the standing
a connection body for accommodating the cable by introducing the cable into the receiving space; and
and a fixing part for fixing the cable introduced into the receiving space of the connection body,
The fixing part is a connection device of an underground low-voltage cable, characterized in that it is provided with a connection bolt that is fastened to the connection body to limit the release by pressing the cable. The method according to claim 1,
The connection body includes a wire lead-in part and a wire lead-out part that enable each of the lead-in side cable and the lead-out-side cable to be individually inserted among the cables, wherein the wire lead-in part and the wire lead-out part are opposite to each other with respect to the connection body. A connection device for an underground low-voltage cable, characterized in that it is provided in a plurality of quantities. The method according to claim 1 or 2,
The connection body includes a rigid structure for setting an accommodation space therein to receive the cable in a retractable manner, and a cutout that is installed inside the rigid structure and peels off the sheath of the incoming cable to electrically conduct electricity with the conductor part of the cable. It has a structure, and the rigid structure is an underground low-voltage cable connection device, characterized in that it is configured to be wrapped around the outside by an insulating structure. 4. The method according to claim 3,
The insulation structure and the rigid structure have a bolt inlet hole for fastening with the connection bolt, and the bolt inlet hole has a corresponding thread formed on an inner circumferential surface for fastening with the connection bolt. 's connector. 4. The method according to claim 3,
The cut-out structure includes a body portion coupled to the rigid structure, and a cutting portion protruding from the body portion toward the inside of the accommodation space. 6. The method of claim 5,
The body portion has an inclined surface extending in the axial direction with a reduced cross-sectional area toward the cutting portion on both side surfaces, and the rigid structure has an insertion groove extending in the axial direction with a reduced cross-sectional area toward the inner side for axial assembly with the inclined surface A connection device for an underground low-voltage cable, characterized in that it comprises a. 6. The method of claim 5,
The cutting part is an underground low-voltage cable connection device, characterized in that it comprises a plurality of blade structures extending long toward the assembly direction of the cut-out structure with respect to the rigid structure. 8. The method of claim 7,
The plurality of blade structures is an underground low-voltage cable connection device, characterized in that it is arranged in parallel along the assembly direction of the cut-out structure with respect to the rigid structure. The method according to claim 1,
The connection bolt includes a bolt body having a thread formed along the outer circumferential surface, and a breakable bolt head connected to one side of the bolt body, wherein the breakable bolt head is a first bolt head connected to one side of the bolt body; and a second bolt head that is detachably connected to the first bolt head through a breaking part as a medium. 3. The method according to claim 2,
The connecting material for standing has the connection body in an amount of at least two or more, and the connection bodies in the number of two or more are connected in parallel to each other so that a plurality of wire inlets and wire lead outs are disposed at positions opposite to each other with respect to the connecting body A connection device for an underground low-voltage cable, characterized in that it becomes. 3. The method according to claim 2,
Further comprising a closing cap which is respectively fastened to the wire lead-in portion and the wire lead-out portion of the connection body to airtightly penetrate and receive the incoming-side cable and the out-side cable respectively, wherein the closing cap penetrates the cable in the inner axial direction A connection device for an underground low-voltage cable, characterized in that it is configured in a hollow shape to accommodate it. 12. The method of claim 11,
An underground low-voltage cable connection device, characterized in that a waterproof coating agent is applied to the inside of the closing cap to block the inflow of fluid through the wire lead-in part and the wire lead-out part of the connection body.

Images