KR100512311B1 - Cable connection device - Google Patents

Abstract

 The present invention relates to an underground low voltage cable connecting device constituting a branch circuit of underground cables used for underground distribution lines.

In the conventional underground cable connection device, when the tension of the cable is strong, the connection tab is peeled off or the O-ring structure is lifted, and thus the waterproof function is lost, and the fixing bolt can be released by the vibration that acts repeatedly for a long time, thereby acting on the cable. By force, the cable can be easily detached from the connector body.

The present invention consists of a material having a predetermined elasticity so that the cable is fixed by compression in a state where the cable is inserted into the connecting device body, so that the tension of the cable is provided by providing a sealing structure by compression. In the fixing means for the connecting sleeve of the cable in contact with the connecting conductor inside the connecting device body to maintain the sealing structure even if excessively acting, the anti-loosening means of the fixing means integrally with the waterproof cap It is configured to provide a structure in which the anti-loosening means is coupled to the fixing means when the waterproof cap is fixed and fixed, so that the fixing means can be prevented from being released.

Description

Cable connection device for underground low voltage {Cable connection device}

The present invention relates to an underground low voltage cable connecting device constituting a branch circuit of underground cables used for underground distribution lines.

In general, the underground cable connection device is a device for connecting the cable is installed to form a branch circuit at the point where the low-voltage cable is branched on the underground distribution line.

As the underground cable connection device is installed in the ground, the humidity is high and moisture can penetrate, and thus the risk of a short circuit always follows.

Therefore, the sealing structure for preventing the penetration of moisture is very important for such underground connection device.

1 is a perspective view showing a conventional underground cable connection device.

As shown in FIG. 1, the conventional underground cable connecting device includes a fixing plate 200 for fixing the connecting device main body 100, and connecting tabs fitted to the cable 400 on both sides of the connecting device main body 100 ( A connection tab coupling part 110 coupled to 300 is configured, and the connection tab coupling part 110 is perforated through the internal connection conductor of the connection device main body 100 to which the conductive wire of the cable 400 is fitted. It provides an inner coupling path of the outer surface is made of O-ring (O-ring) structure is in close contact with the inner surface of the connection tab 300 has a sealing structure to prevent moisture can penetrate.

In addition, the upper surface of the connection device body 100 is configured with a fixing bolt coupling portion 120 is fitted with a fixing bolt for fixing the connection sleeve 500 coupled to the inside, the fixing bolt coupling portion 120 is waterproof Cap 600 is fitted to have a structure to prevent moisture from penetrating.

Referring to the coupling structure of the conventional underground cable connection device as follows.

The connection device body 100 is fixed to the structure to be fixed through the fixing plate 200.

The connection device main body 100 has a cable connection conductor embedded therein, and a connection tab coupling part 110 is configured to fit the cable 400 connected to the connection conductor.

The fixed bolt coupling portion 120 is configured to protrude and extend to the side of the connection device body 100, the outer peripheral surface is configured to be fitted to the inner peripheral surface of the connection tab 300 fixed to the cable 400 is O-ring protrusions are formed on the outer circumferential surface to allow further sealing, and when the connecting sleeve 500 is pushed into the connecting tab coupling part 110 to be coupled with the connecting tab 300, the inner circumferential surface of the connecting tab 300 is connected to the connecting tab. The O-ring protrusion of the unit 110 is in close contact to prevent the external moisture from penetrating.

The connection tab 300 is inserted into the cable 400 after the cable conducting work, and can be inserted by working the connection tab 300 according to the thickness of the cable 400, the connection sleeve 500 is the connection tab 300 After the work is pressed to the endothelial exposed by the wire work is fixed to the cable 400.

In addition, in order to fix the connecting sleeve 500 in contact with the connecting conductor, the upper part of the connecting device main body 100 is configured with a fixed bolt coupling portion 120 at each corresponding position, the fixed bolt coupling portion 120 is fixed bolt Is inserted to fix the connection sleeve 500 to be positioned below.

The fixing bolt coupling portion 120 is through the hole for the fastening of the fixing bolt, the waterproof cap 600 is coupled to prevent the penetration of moisture.

In the underground cable connection device, when the worker pushes the connection sleeve 500 of the cable 400 deeply into the connection tab coupling portion 110, the connection tab coupling portion 110 is inserted into the connection tab 300. , Is coupled in close contact with the inner peripheral surface of the connection tab 300 by the O-ring projection.

At this time, the connecting sleeve 500 is maintained in contact with the connecting conductor in the connecting device main body 100, and fixed to the connecting sleeve 500 by inserting a fixed bolt into the fixed bolt coupling portion 120 formed thereon, Insert the waterproof cap 600 to the fixed bolt coupling portion 120 to complete the coupling.

The conventional underground cable connecting device blocks external moisture through the O-ring structure and the waterproof cap of the part in contact with the cable by using the connection tab, but a strong tensile force acts on the cable, or stress such as bending or twisting. In this case, the connection tab is peeled off or the O-ring structure is lifted up, and thus the waterproof function is lost.

In addition, the underground cable connection device is installed in a place such as a manhole, a handhole, a junction box installed in a roadway or sidewalk, and such a place is exposed to vibrations or other vibrations caused by the operation of a traffic vehicle. Even if the household vibration is weak, the fixing bolt can be released by the vibration that acts repeatedly for a long time, and the cable can be easily detached from the main assembly by the force acting on the cable.

In the present invention, the cable entry portion itself is made of a material having a predetermined elasticity so that the cable is fixed by compression in a state where the cable is inserted into the connecting device body, so that a sealing structure by compression is provided. Even if the torsion stress is excessively applied, the integrity of the sealing structure is maintained.

In addition, the present invention is modularized into a unit (2, 3, 4) unit unit according to the type of the connection device by adapting the main body of the connection device according to the type of connection device to be adaptively applied by separating, combining It is to increase the efficiency of the use.

And the present invention in the fixing means for the connecting sleeve of the cable in contact with the connecting conductor inside the connecting device body, by constituting the anti-loosening means of the fixing means integrally with the waterproof cap, the anti-loosening means when the waterproof cap is fixedly coupled By providing a structure coupled with the fixing means, it is possible to prevent the fixing means from being released even if repeated vibration is applied.

The present invention underground low voltage cable connection device,

A connecting conductor is formed inside, and a cable inlet through which the cable is introduced through the connecting conductor is formed, and a fixing bolt is fitted thereon to fix the connecting sleeve of the cable in contact with the connecting conductor. A connecting device body having a bolt coupling hole formed therein, a bracket for fixing the connecting device main body to the fixed object structure, a body guide for fixing the connecting device main body to the upper surface of the bracket, and a connecting device main body pressed from the upper part of the body guide. A connecting bar having a fixing bar which is compressed on the guide and fixed to the bracket through the main body guide and an inner diameter corresponding to the outer diameter of the cable is formed and is inserted into the cable inlet of the connecting device main body and inserted through the connecting hole. It is fixed to the main body as well as an adapter (adaptor) to block the ingress of external moisture.

The connecting device body and the adapter are made of a material having elasticity, so that the connecting device body attached to the body guide and the body guide is fixed to the bracket by the fixing bar, and the clamping force of the fixing bar acts as a compressive force from the top to the cable. It is characterized by a sealing structure.

Referring to the embodiment shown in the accompanying drawings of the present invention underground low-voltage cable connection device characterized by such a configuration will be described as follows.

As shown in Figures 2 to 5,

A connecting conductor is formed inside, and a cable inlet 21 through which the cable 10 is introduced through the connecting conductor is formed on both sides, and the connecting sleeve 11 of the cable 10 is formed on the connecting conductor. Fixing means such as bolts to the connecting device main body 20 is formed with a fixing bolt coupling sphere 22 is inserted into the fixing bolt 30 for fixing in contact with Bracket 40 for fixing by using, a body guide 50 for designating a position for fixing the connecting device body 20 to the upper surface of the bracket 40, and a connecting device body from the upper part of the body guide 50. Fixing bar 60 for fixing the body guide 50 to the bracket 40 in a state in close contact with the 20, and the coupling sphere 71 having an inner diameter corresponding to the outer diameter of the cable 10 is formed and the connection Inserted into the cable inlet 21 of the device body 20 through the coupler 71 Sikkim secure the cable 10 to the connecting device main body 20 is of course made up of the adapter (adaptor) (70) to block the penetration of external moisture.

And the connecting device body 20 and the adapter 70 is made of an elastic material such as rubber.

Fixing pin coupling holes 41, 51, and 61 are formed at corresponding positions of the fixing bar 60 on which the body guide 50 and the fixing bar 60 mounted and fixed from the upper portion thereof and the bracket 40 on which the body guide 50 is placed. The fixing pin 80 is inserted into the fixing pin coupler 61 of the bracket 40 through the body guide 50 from the upper portion of the fixing pin coupler 61 of the fixing bar 60. Fix the main body guide 50 to the bracket 40 by using, and also to fix the connection device main body 20 attached to the main body guide (50).

In addition to the fixing pin 80 as a fixing means can be applied in various ways, such as screws, bolts, in this embodiment fixing pin 80 in consideration of the material of the connection device body 20, the body guide 50 and the fixing bar (60) ) Was applied.

In addition, the connection device body 20 has a modular structure in units of groups (2, 3, 4) according to the type of connection device.

And, each of the unit unit body module of the connecting device body 20 is configured with a guide coupling portion 23 for coupling to the body guide 50, the guide coupling portion 23 is mounted on the body guide 50 Guide grooves 52 are formed.

In addition, the guide groove 52 of the main body guide 50 has a stopper protrusion 52a for preventing the guide coupling portion 23 from being pushed out.

In addition, the fixing bar 60 is formed with a main body contact portion 62 in close contact with the guide engaging portion 23 protruding to each position corresponding to the guide groove 52, when engaging from the top of the body guide 50 Body contact portion 62 has a structure that can be compressed by pressing the guide engaging portion 23 of the connecting device main body 20.

And, as shown in Figure 4, the inner surface of the coupler 71 of the adapter 70 to form a projection (71a) along the inner circumferential surface to increase the adhesion with the cable.

 In addition, as shown in Figure 5, the waterproof cap is fitted to the fixed bolt coupler 22 to be fitted to the fixed bolt coupler 22 to prevent moisture from penetrating the inside through the fixed bolt coupler (22) It further comprises a 90, the waterproof cap 90 is integrally fixed to the fixing rod 91 having an outer surface corresponding to the shape of the wrench portion 31 of the fixing bolt 30 is composed of a boltless wrench. When the waterproof cap 90 is coupled to the fixing bolt coupler 22, the fixing rod 91 is inserted into the wrench portion 31 of the fixing bolt to prevent the fixing bolt 30 from being loosened. And reference numeral 92 is a handle.

The embodiment of the present invention having such a configuration is detachable by modularizing the connecting device main body 20 into groups, and has a structure that can be easily applied according to the type of connecting device.

The present embodiment shown in the drawings is an illustration of an embodiment of a four-piece branch connection is an example in which the connection device body 20 is composed of four modules.

Such a connection device body 20 is composed of a cable inlet 21 on both sides, the fixing bolt coupler 22 is configured to fit the fixing bolt 30 to the upper portion.

The connecting device body 20 has a structure fixed by the body guide 50 and the fixing bar 60, the connecting device body 20 extends toward the cable inlet 21 and has a step with the top surface Guide coupling portion 23 having an upper surface is configured.

In addition, the body guide 50 is configured with a guide groove 52 corresponding to its shape so that the guide coupling portion 23 can be coupled, the guide coupling portion 23 is coupled to form a guide coupling portion (23) The guide groove 52 is formed with a stopper protrusion 52a having a predetermined height so that the connecting device body 20 is not pushed forward or backward.

Since the entire guide device body 20 is separated by each guide module unit 52 by the guide groove 52, when the guide coupler 23 is compressed by the fixing bar 60, the guide groove 52 is pushed to the side to affect both sides. It will act as a partition to prevent this.

 The fixing bar 60 is mounted on the upper part of the fixing bar 60, and the fixing bar 60 protrudes so as to be in close contact with each of the guide grooves 52, that is, the upper surface of the guide coupling part 23. Configure

The fixing bar 60, the body guide 50, and the bracket 40 have fixing pin coupling holes 61, 51, and 41 formed at respective positions, and fixing pins (from the top of the fixing bar 60). 80 is inserted into the fixing pin coupler 61 of the bracket 40 through the fixing pin coupler 51 of the body guide 50 from the fixing pin coupler 61 and the body close contact portion of the fixing bar 60. While 62 presses and compresses the upper surface of the guide engaging portion 23 of the connecting device body 20, the main body guide 50 and the connecting device body 20 are fixed to the bracket 40.

The cable inlet 21 is formed larger than the general standard of the cable 10, and constitutes an adapter 70 for the application of the cable 10 of various standards and the sealing effect of the complete moisture barrier.

The adapter 70 has an outer diameter configured to be inserted into the cable inlet 21 by an interference fit type, and the inner diameter of the coupler 71 to which the cable 10 is coupled is determined according to the size of the cable 10 to be applied. .

In addition, a protrusion 71a is formed along the inner circumferential surface of the inner circumferential surface of the coupler 71 of the adapter 70, and as the cable 10 is coupled, the adhesion to the cable 10 is increased to further increase the sealing effect. Make it available.

The connecting device body 20 and the adapter 70 is made of a material having elasticity, such as rubber, the main body contact portion 62 of the fixing bar 60 is the guide coupling portion 23 of the connecting device body 20 By pressing the guide coupling portion 23 and the adapter 70 is compressed to provide a structure to tighten the cable (10).

In this case, the fixing bar 60 and the body guide 50 are made of high strength plastic so that there is no difficulty in the compression force acting on the connecting device body 20 and the adapter 70.

In addition, the upper part of the connection device main body 20 is fixed bolt coupler 22 is configured to fix the connection sleeve 11 of the cable which is introduced into the interior through the cable inlet 21 in contact with the connection conductor. , The fixing bolt coupler 22 is fitted with a waterproof cap 90 to prevent external moisture penetration.

The waterproof cap 90 forms the outer surface of the same shape (generally hexagonal) of the wrench portion 31 of the fixing bolt 30 consisting of a tanless wrench bolt, and waterproof through the injection process of the waterproof cap 90 It is formed integrally with the cap 90.

Such a waterproof cap 90 is inserted into the fixing bolt coupler 22 in the interference fit type, the fixing rod 91 is inserted into the fixing bolt coupler 22, the wrench portion 31 of the fixing bolt 30 It is fitted to have a structure to prevent loosening of the fixing bolt (30).

Embodiments of the present invention featuring such a structure are combined by the following bonding method.

First, the adapter 70 is inserted into the cable inlet 21 of the connecting device body 20.

At this time, the adapter 70 is determined according to the standard of the cable 10 to be connected.

The body guide 50 is positioned in the bracket 40 in accordance with the fixed position of the connecting device body 20, and the connecting device body 20 is connected to the guide groove 52 of the main body guide 50. The guide coupling portion 23 of the coupling.

Then, the cable 10 having completed the connection sleeve work on the conductive wire is pushed in the adapter 70 so that the connection sleeve penetrates into the connection conductor.

Thereafter, the fixing bar 60 from the top of the body guide 50 is put on the fixing pin coupler 61 to the fixing pin coupler 51 of the body guide 50, and the fixing pin 80 is fixed pin coupling Engage from sphere 61 and push it down.

The fixing pin 80 is pushed from the fixing pin coupler 61 to the fixing pin coupler 41 of the bracket 40 through the fixing pin coupler 51 of the body guide 50 while being fitted in an interference fit type. To fix the body guide 50 to the bracket 40.

At this time, the body contact portion 62 of the fixing bar 60 is positioned to the upper portion of the guide groove 52 of the body guide 50, while the fixing bar 60 is coupled by the fixing pin 80, the guide groove The guide engaging portion 23 of the connecting device body 20 attached to 52 is pressed to compress.

Therefore, the guide coupling portion 23 is compressed by the force acting from the top by the fixing bar 60, the adapter 70 is also inserted into the cable inlet 21 while the cable (inserted in the adapter 70) Tighten 10).

Thereafter, the fixing bolt 30 is inserted into the fixing bolt coupler 22, and the connecting sleeve 11 is fixed on the connecting conductor by using a wrench to fix the fixing rod 91 of the waterproof cap 90. The waterproof cap 90 is inserted into the fixing bolt coupler 22 in accordance with the wrench portion 31 of the bolt 30.

In this embodiment, the fixing rod 91 may be configured separately, and the coupling rod and the fixing portion 91 may be fixed to the lower end of the waterproof cap 90 so that the fixing rod 91 may be fitted in an interference fit type. Rod 91 can be inserted into the waterproof cap 90 can be used.

The coupling is completed in this way, the cable 10 is coupled in the form tightened to the adapter 70, because the connection sleeve is fixed to the connection conductor by the fixing bolt 30, there is no fear of leaving the outside, the cable ( 10) is pulled from side to side, even if tension is generated, the gap does not occur due to the material (rubber) characteristics of the adapter 70, there is no fear of penetration of moisture.

In addition, the waterproof cap 90 is coupled with a force that does not turn well even if the operator turns the handle 92, there is no fear that the fixing bolt 30 is released by repeated vibration.

On the other hand, Figure 6 is a view showing another embodiment of the present invention, the reference numerals are shown by applying the same as the embodiment of the present invention.

As shown in Figure 6, in the connecting device body 20, the length of the adapter 70 that is inserted into the guide coupling portion 23 and the cable inlet 21 is configured to extend than in the embodiment of the present invention In addition, the body guide 50 also constitutes a guide groove 52 having a shape and a length corresponding to the guide coupling portion of the connecting device body 20 using the fixing bar 60 having the same length or different lengths. 23) is characterized in that the multi-stage compression force can be applied.

As described above, the present invention provides a structure in which a compressive force acts on the cable entry itself so that the cable can be tightened and fixed, so that excessive tension is applied to the cable or tension is applied to the cable from side to side, There is no fear of cable entry or lifting of the cable, providing a complete sealing structure.

In addition, since the adapter according to the standard of the cable is configured to the inlet of the cable, it is possible to apply a variety of cable standards.

In addition, since the connecting device main body is modularized and configured to provide a structure that can be separated and combined, it can be variously applied according to the type of connecting device.

For example, in the present embodiment, in the case of four-group branch connection, for example, two-group branch connection, only two modules can be used for the main body of the connecting device, and in this case, the bracket, main body guide, and fixing bar can be used as they are. Brackets, body guides and fixing bars are available to apply only two modules.

In addition, since the fixing rod is integrated with the waterproof cap maintaining the completely fixed state, and the fixing rod is fastened to the fixing means of the connecting sleeve, it is possible to completely prevent loosening of the fixing means.

1 is a perspective view showing the configuration of a conventional underground low voltage cable connection device.

Figure 2 is a perspective view showing the configuration of the cable connection device for underground pressure in the present invention.

Figure 3 is an exploded perspective view showing the configuration of the present invention underground low voltage cable connection device.

Figure 4 is a cut-away view to show the inner cross section of the adapter in the present invention.

5 is a view showing another embodiment of the present invention.

Claims (3)

A connecting conductor is formed inside, and a cable inlet 21 through which the cable 10 is introduced through the connecting conductor is formed on both sides, and the connecting sleeve 11 of the cable 10 is formed on the connecting conductor. The connecting device main body is made of a material having elasticity formed with a fixing bolt coupler 22 to which the fixing bolt 30 is fixed to be in contact with the fixing device. 20) with, A bracket 40 for fixing the connection device body 20 to the structure to be fixed using a fixing means; Main body guide 50 for fixing the connecting device main body 20 to the upper surface of the bracket 40 and the connecting device main body 20 on the main body guide 50 from the upper portion of the main body guide 50 to compress the main body Underground low pressure cable connection device, characterized in that it comprises a fixing bar (60) for fixing to the bracket (60) through the guide (50). The method of claim 1, wherein a coupler 71 having an inner diameter corresponding to the outer diameter of the cable 10 is formed and is fitted to the cable inlet 21 of the connector body 20 through the coupler 71. It is made of a material having elasticity to fix the cable 10 to the connecting device body 20 as well as to block the ingress of external moisture, the inner surface of the coupler 71 is in close contact with the cable 10 along the inner peripheral surface Underground low pressure cable connection device, characterized in that it further comprises an adapter (adaptor) 70 is formed a projection (71a) for increasing. According to claim 1, and the waterproof cap 90 is fitted to the fixed bolt coupler 22 to be fitted to the fixed bolt coupler 22 to prevent moisture from penetrating the inside through the fixed bolt coupler (22) and It further comprises a fixing rod (91) having an outer surface corresponding to the shape of the wrench portion 31 of the fixing bolt (30) consisting of a boltless wrench, the waterproof cap (90) is a fixing rod (91) The fixing rod 91 is configured so that the fixing rod 91 can be inserted into the interference fitting type in a shape corresponding to the outer surface of the fixing rod 91 when the waterproof cap 90 is coupled to the fixing bolt coupler 22. ) Is inserted into the fixing rod coupling portion of the waterproof cap 90 to the upper side and the lower portion is inserted into the wrench portion 31 of the fixing bolt to have a structure to prevent the fixing bolt 30 from being loosened Connecting device.