KR102022467B1 - Ultra high voltage cable terminal joint box having conductor connection structure of plug in-out type - Google Patents

Abstract

The present invention relates to an ultra-high voltage cable termination box, and more particularly to a detachable connection structure of the power electrode and the conductor sleeve of the ultra-high voltage cable termination box.
In order to achieve the above object, the ultra-high voltage cable terminator having a plug-in-type conductor connection structure according to the present invention includes a power electrode and a ground electrode formed at upper and lower ends, respectively, and are formed along an inner circumferential surface of the power electrode. An epoxy bushing with a circular coil spring inserted into the groove; And a conductor sleeve formed at one end thereof with a conductor insertion portion into which the conductor of the ultra-high voltage cable is inserted, and having a coupling groove formed to engage the coil spring along the outer circumferential surface of the other end, wherein the insertion groove is configured as a pair. And a connection spring and a fixed spring, and three fastening grooves are formed, and a connection fastening groove for connecting with the connection spring, a fixed fastening groove for fastening with the fixed spring, and the conductor sleeve are plugged out. It is a release fastening groove, and the connection spring and the fixed spring may be an inclined coil spring which is inclined and coiled at a predetermined angle in the winding direction of the coil.

Description

ULTRA HIGH VOLTAGE CABLE TERMINAL JOINT BOX HAVING CONDUCTOR CONNECTION STRUCTURE OF PLUG IN-OUT TYPE}

The present invention relates to an ultra-high voltage cable termination box, and more particularly to a detachable connection structure of the power electrode and the conductor sleeve of the ultra-high voltage cable termination box.

In general, the ultra-high voltage cable is made by connecting at intervals of several hundred m to several km, the ultra-high voltage cable terminal is connected by the terminal connection.

In the connection of the terminal box, the conductor exposed at the end of the ultra-high voltage cable is connected by using an accessory material called a conductor sleeve, and an insulation reinforcement called an epoxy bushing is connected to alleviate the electric field strength of the connected conductor part.

In the case of epoxy bushing, it has a predetermined internal and external diameter according to the capacity and size of the ultra-high voltage cable and has a specific shape by electric field analysis. A power electrode is formed on the side connected to the conductor sleeve, and a ground electrode is formed on the opposite side. .

In the case of the power supply electrode, the electrical connection with the conductor sleeve is necessary, and when the relatively bulky epoxy bushing is connected while the conductor sleeve is connected, the power supply electrode is located inside the epoxy bushing, so the connection process with the conductor sleeve is There is a problem that is not easy.

On the other hand, Korean Patent No. 10-1134181 has a "conductor insertion portion which is inserted and compressed the conductor of the ultra-high voltage cable at one end, and the other end is fastened to the multi core band connected to the power electrode of the epoxy bushing, the elastic body at a predetermined position A conductor sleeve which is formed by at least one electrode connecting pin which is supported by the locking pin and locked or released by the locking pin; Epoxy molding having an inner and outer diameter, the ground electrode is embedded at one end and the power electrode is embedded at the other end, the power electrode is an epoxy bushing formed with one or more fastening grooves are self-locked with the electrode connecting pin; And a structure in which the electrode connecting pin is fixed to the fastening groove by the locking pin of the locking pin and the elastic force of the elastic body in the assembled state of the conductor sleeve and the epoxy bushing.

According to the above patent, the connection process of the high voltage cable can be reduced by simplifying the connection structure of the epoxy bushing and the conductor sleeve.However, when troubleshooting or maintenance is performed after the epoxy bushing and the conductor sleeve are connected, The entire junction box must be dismantled. Therefore, there is a problem that time, economic and human resources are consumed very much in the troubleshooting or maintenance process.

Patent Document 1: Republic of Korea Patent No. 10-1134181

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide a connection structure of an ultra-high voltage cable termination box that can more easily attach and detach the power electrode and the conductor sleeve of the ultra-high voltage cable termination box.

In order to achieve the above object, the ultra-high voltage cable terminator having a plug-in-type conductor connection structure according to the present invention includes a power electrode and a ground electrode formed at upper and lower ends, respectively, and are formed along an inner circumferential surface of the power electrode. An epoxy bushing with a circular coil spring inserted into the groove; And a conductor sleeve in which one end of the ultra-high voltage cable is inserted, and a conductive sleeve formed with a fastening groove to be fastened to the coil spring along the outer circumferential surface of the other end, wherein the fastening groove is formed in a pair. The fastening groove and the other may be a release fastening groove. Here, the release fastening groove is preferably formed deeper than the connection fastening groove.

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In addition, the ultra-high voltage cable termination box having a plug-in-type conductor connection structure according to the present invention, the power electrode and the ground electrode is formed in the upper and lower ends, respectively, the circular coil in the insertion groove formed along the inner peripheral surface of the power electrode Spring-inserted epoxy bushings; And a conductor sleeve formed at one end thereof with a conductor insertion portion into which the conductor of the ultra-high voltage cable is inserted, and having a coupling groove formed to engage the coil spring along the outer circumferential surface of the other end, wherein the insertion groove is configured as a pair. And a connection spring and a fixed spring, and three fastening grooves are formed, and a connection fastening groove for connecting with the connection spring, a fixed fastening groove for fastening with the fixed spring, and the conductor sleeve are plugged out. It may be a release fastening groove.

In addition, the ultra-high voltage cable termination box having a plug-in-type conductor connection structure according to the present invention, the power electrode and the ground electrode is formed in the upper and lower ends, respectively, the circular coil in the insertion groove formed along the inner peripheral surface of the power electrode Spring-inserted epoxy bushings; And a conductor sleeve formed at one end thereof with a conductor insertion portion into which the conductor of the ultra-high voltage cable is inserted, and having a coupling groove formed to engage the coil spring along the outer circumferential surface of the other end, wherein the insertion groove is configured as a pair. Is formed of a connection spring and a fixed spring, the fastening groove is composed of two, the connection fastening groove for the connection with the connection spring, the fixed ring is freely movable fastening and the fixed ring for performing a fixed fastening with the fixed spring It may be a fastening groove.

In addition, the ultra-high voltage cable termination box having a plug-in-type conductor connection structure according to the present invention, the power electrode and the ground electrode is formed in the upper and lower ends, respectively, the circular coil in the insertion groove formed along the inner peripheral surface of the power electrode Spring-inserted epoxy bushings; And a conductor sleeve formed at one end thereof with a conductor inserting portion into which the conductor of the ultra-high voltage cable is inserted, and having a fastening groove formed to be engaged with the coil spring along the outer circumferential surface of the other end. It is ringed and wound in a circular track, and positioned in a specific direction corresponding to the size of the insertion groove and the fastening groove, the direction of the coil spring can be changed according to the forward and backward of the conductor sleeve.

In addition, the ultra-high voltage cable termination box having a plug-in-type conductor connection structure according to the present invention, the power electrode and the ground electrode is formed in the upper and lower ends, respectively, the circular coil in the insertion groove formed along the inner peripheral surface of the power electrode Spring-inserted epoxy bushings; And a conductor sleeve formed at one end thereof with a conductor insertion portion into which the conductor of the ultra-high voltage cable is inserted and formed with a coupling groove formed to engage the coil spring along the outer circumferential surface of the other end, wherein a part of the coil spring is formed from an inner circumferential surface of the power electrode. It may protrude by a predetermined length.

In addition, the ultra-high voltage cable termination box having a plug-in-type conductor connection structure according to the present invention, the power electrode and the ground electrode is formed in the upper and lower ends, respectively, the circular coil in the insertion groove formed along the inner peripheral surface of the power electrode Spring-inserted epoxy bushings; And a conductor sleeve formed at one end thereof with a conductor inserting portion into which the conductor of the ultra-high voltage cable is inserted, and having a coupling groove formed to engage the coil spring along the outer circumferential surface of the other end, wherein the coil spring has a predetermined angle in a winding direction of the coil. At least one inclined coil spring is inclined to be coiled by the inclination, and the direction of the inclined coil spring is changed according to the direction of the fastening groove of the conductor sleeve, the conductor sleeve can be fastened or released Can be set to status.

According to the above-described configuration, according to the embodiment of the present invention, the conductor sleeve can be attached to the power electrode by pushing it once toward the power electrode of the epoxy bushing, and once again pushed the conductor sleeve away from the power electrode by pulling in the opposite direction. Can be removed.

Therefore, the power electrode and the conductor sleeve of the epoxy bushing can be easily attached and detached, thereby simplifying the terminal connection process of the ultra-high voltage cable.

In addition, the conductor sleeve can be easily detached (disconnected) from the power supply electrode without dismantling the ultra-high voltage cable termination box, thereby greatly simplifying the troubleshooting and maintenance process.

In addition, since the conductor sleeve is supported by the fastening spring made of stainless steel together with the fastening spring made of copper for energizing, it is possible to effectively support up to several tons of ultra-high voltage cables.

1 is a cross-sectional view of an ultra-high voltage cable termination box according to a first embodiment of the present invention.
2 is a longitudinal sectional view of a power electrode of an ultra-high voltage cable termination box according to a first embodiment of the present invention.
3 is a structural diagram of an inclined coil spring used in an ultra high voltage cable termination box according to a first embodiment of the present invention.
4 is a cross-sectional view of the conductor sleeve of the ultra-high voltage cable termination box according to the first embodiment of the present invention.
5A to 5E illustrate a connection process of an ultra-high voltage cable terminator having a plug-in-type conductor connection structure according to a first embodiment of the present invention.
6 is a cross-sectional view illustrating a connection state of an ultra-high voltage cable terminator having a plug-in-type conductor connection structure according to a second embodiment of the present invention.
7 is a cross-sectional view of an unconnected state of a high voltage cable termination box having a plug-in-type conductor connection structure according to a second embodiment of the present invention.
8 is a state cross-sectional view for plugging out a conductor sleeve in an ultra-high voltage cable terminator having a plug-in-type conductor connection structure according to a second embodiment of the present invention.
9 is a cross-sectional view illustrating a connection state of an ultra-high voltage cable terminator having a plug-in-type conductor connection structure according to a third embodiment of the present invention.
10 is a state cross-sectional view for plugging out a conductor sleeve in an ultra-high voltage cable terminator having a plug-in-type conductor connection structure according to a third embodiment of the present invention.
11 is a cross-sectional view of an unconnected state of an ultra-high voltage cable terminator having a plug-in-type conductor connection structure according to a third embodiment of the present invention.
12 is a flowchart illustrating the concept of plug-in-out of a conductor sleeve in an ultra-high voltage cable terminator having a plug-in-type conductor connection structure according to embodiments of the present invention.

Hereinafter, an ultra-high voltage cable terminator having a plug-out type conductor connection structure according to the present invention will be described in detail with reference to the accompanying drawings.

The detailed description of specific embodiments shown in the accompanying drawings is to be read in conjunction with the accompanying drawings, which are considered to be part of the description of the invention as a whole. References to directions or orientations are for convenience of description only and are not intended to limit the scope of the invention in any way.

Specifically, a term indicating a position such as "down, up, horizontal, vertical, top, bottom, up, down, top, bottom", or a derivative thereof (for example, "horizontally, downward, upward"). Etc.) should be understood with reference to both the drawings being described and related descriptions. In particular, these relative words are merely for convenience of description, and do not require that the apparatus of the present invention be configured or operated in a particular direction.

In addition, terms that refer to a mutual coupling relationship between components such as “mounted, attached, connected, connected, interconnected,” and the like, unless otherwise stated, indicate that the individual components are directly or indirectly attached, connected, or fixed. It is to be understood that it is to be understood as a term encompassing not only a movable, non-movable state, as well as a movably attached, connected and fixed state.

In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible even though they are shown in different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

[First Embodiment of the Present Invention] on  According Plug-in -High voltage cable termination box with out-conductor connection structure]

The first embodiment of the present invention is described as the embodiment used for the electrical connection with the conductor sleeve 200 and the fixing of the conductor sleeve 200 using only one coil spring 130.

1 is a cross-sectional view of an ultra-high voltage cable termination box according to a first embodiment of the present invention.

The ultra-high voltage cable applied to the epoxy bushing 100 and the conductor sleeve 200 shown in FIG. 1 may be a cross linked-polyethylene (XLPE) or oil filled (OF) cable. A part of the termination junction box is shown in FIG. 1, and the illustration of the remaining connection accessories is omitted.

After the end of the ultra-high voltage cable G is cut, the conductor portion is exposed after the outer sheath and the insulator are removed.

The exposed conductor is inserted through the conductor insert 230 of the conductor sleeve 200 and compressed according to the connection design criteria.

Various compression reinforcements are formed in the conductor sleeve 200 after the compression is completed, and then inserted into the epoxy bushing 100.

On the ground electrode side of the epoxy bushing 100, an adapter, an intermediate flange, and a lower copper tube may be sequentially bolted together.

2 is a longitudinal cross-sectional view of a power electrode of the ultra-high voltage cable termination box according to the first embodiment of the present invention, Figure 3 is a structural diagram of the inclined coil spring used in the ultra-high voltage cable termination box according to the first embodiment of the present invention. .

1 and 2, the power electrode 110 has an insertion space into which the conductor sleeve 200 can be inserted, and a circular insertion groove formed along an inner circumferential surface at a predetermined position of the inner circumferential surface of the power electrode 110. 120) is formed.

The coil spring 130 may be inserted into the insertion groove 120.

A portion of the coil spring 130 may protrude by L1 from the inner circumferential surface of the power electrode 110.

The coil spring 130 may be made of a material including copper to conduct electricity with the conductor sleeve 200.

The coil spring 130 is not a general circular spring having a circular shape of a wound line, but is an elliptical spring in which an elliptical spring is formed in an elliptical shape by applying pressure to the circular spring in one direction.

Referring to FIG. 3, in FIG. 4, (a) is a front view of the inclined coil spring, and (b) is a front view of a general circular coil spring.

In the coil spring used in the first embodiment of the present invention, a general circular spring is pressurized in one direction so that the spring forms an oblique line (angle θ).

In general circular spring (A), when the spring is pressed, only the force in the direction opposite to the pressing direction is applied and the force in the direction orthogonal to the pressing direction is not applied. That is, there is only the force of the vertical component and no force of the horizontal component.

Meanwhile, when the spring is pressed, the inclined coil spring B acts not only in the opposite direction to the pressing direction but also in the orthogonal direction due to the diagonally wound shape. That is, the force of the vertical component and the force of the horizontal component coexist.

In addition, the inclined coil spring (B) is placed in a state that is positioned in a predetermined direction corresponding to the fastening groove to be inserted (refer to the drawing of FIG. 1), and its direction may be changed by an external force applied to the spring. Have

The fastened member (in the present invention, the conductor sleeve 200 corresponds to this) that is fastened to the spring having one direction is subjected to a constant force so as not to fall out simultaneously with the fastening, and when the fastened member is pushed in the same direction, the direction of the spring is switched and fastened. Will be placed in a releaseable state.

4 is a cross-sectional view of the conductor sleeve of the ultra-high voltage cable termination box according to the first embodiment of the present invention.

As shown in FIG. 4, one end of the conductor sleeve 200 is formed with a conductor inserting portion 230 into which the conductor of the ultra-high voltage cable is inserted, and the other end of the conductor sleeve 200 is connected to the power electrode 110 of the epoxy bushing 100. Core band (not shown) may be fastened.

In addition, fastening grooves 210 and 220 may be formed at the outer circumference of the other end portion of the conductor sleeve 200, and the fastening grooves 210 and 220 may have a predetermined inclined surface.

At least two fastening grooves 210 and 220 may be formed on an outer circumferential surface of the conductor sleeve 200, and the first fastening groove 210 is for fastening and energizing the coil spring 130 and a second fastening groove. 220 may be used for the purpose of releasing the fastened coil spring 130.

The first fastening groove 210 has a depth L2 smaller than the depth L3 of the second fastening groove 220.

The second fastening groove 220 is formed deeper than the first fastening groove 210 is to secure more space for changing the direction when the coil spring 130 is placed, the actual first fastening groove 210 The space is formed so small that when the first fastening groove 210 and the coil spring 130 is fastened to form a structure difficult to fall in the opposite direction of the fastening direction.

On the contrary, when the second fastening groove 220 and the coil spring 130 are fastened, a space in which the direction of the coil spring 130 can be switched is created, and when the second fastening groove 220 and the coil spring 130 are fastened, a given force is pulled in a direction opposite to the fastening direction. The coil sleeve 130 forms a structure in which the conductor sleeve 200 can be pulled out. This is referred to as Plug-In and Plug-Out in the present invention.

The first fastening groove 210 and the second fastening groove 220 may have inclined surfaces on both sides, and the inclined surfaces may have the same or different inclined angles.

5A to 5E illustrate a connection process of an ultra-high voltage cable terminator having a plug-in-type conductor connection structure according to a first embodiment of the present invention.

First, as shown in FIG. 5A, the conductor sleeve 200 is inserted in the direction of the power electrode 110 of the epoxy bushing 100. At this time, the force (T) acting on the coil spring 130 formed on the inner peripheral surface of the power electrode 110 acts in the upper left direction.

5B, as the conductor sleeve 200 is inserted, the inclined surface of the tip of the conductor sleeve 200 presses the fastening spring 130 formed on the inner circumferential surface of the power electrode 110. The direction of 130 is deformed. It is deformed in the opposite direction by the action of the conductor sleeve 200 in the initially positioned direction.

When the fastening spring 130 is seated in the first fastening groove 210, as shown in FIG. 5B, the fastening between the conductor sleeve 200 and the power electrode 110 is performed, thereby being in a state of being energized and fixed. At this time, since the first fastening groove 210 and the fastening spring 130 have a certain fastening force, the conductor sleeve 200 is placed in a state in which the first fastening groove 210 and the fastening spring 130 do not fall downward.

In this state, the conductor sleeve 200 is pushed upward in order to release the conductor sleeve 200. In the case of troubleshooting or maintenance, the conductor sleeve 200 can be easily detached (disconnected) from the power supply electrode 110 without removing the ultra-high voltage cable terminal junction box. The desorption process is as follows.

First, as shown in FIG. 5C, the conductor sleeve 200 is inserted once more toward the power electrode 110.

When the coil spring 130 is applied to the downward direction in the state where the coil spring 130 is inserted into the second fastening groove 220 (in the arrow P direction), the coil spring 130 is deformed as shown in FIG. 5C. Actually, the second fastening groove 220 has a deeper depth than the first fastening groove 210, and thus, when the coil spring 130 is applied from the upward direction to the downward direction, the coil spring 130 may rotate. It is easy to change the direction because the space is formed.

Subsequently, as shown in FIG. 5D, and as shown in FIG. 5E, the conductor sleeve 200 can be easily detached from the power electrode 110.

As such, the conductor sleeve 200 may be attached to the power electrode 110 by pushing the conductor sleeve 200 toward the power electrode 110 of the epoxy bushing 100 once more, and once again, the conductor sleeve 200 may be pulled in the opposite direction from the conductor 110. The sleeve 200 can be easily detached.

Therefore, the power electrode 110 and the conductor sleeve 200 of the epoxy bushing 100 can be easily attached and detached, thereby simplifying the terminal connection process of the ultra-high voltage cable.

In addition, the conductor sleeve 200 can be easily detached (disconnected) from the power supply electrode 110 without dismantling the ultra-high voltage cable terminal junction box, thereby greatly simplifying the troubleshooting and maintenance process.

[Second embodiment of the present invention on  According Plug-in -High voltage cable termination box with out-conductor connection structure]

The second embodiment of the present invention is an embodiment used for the electrical connection with the conductor sleeve 201 and the fixing of the conductor sleeve 201 using two inclined coil springs (131a, 131b), One of the inclined coil springs is a connection spring 131a for electrical connection with the conductor sleeve 201, and the other is a conductor spring 201. It is described as an embodiment used as a fixing spring 131b for fixing.

6 is a cross-sectional view illustrating a connection state of an ultra-high voltage cable terminator having a plug-in-type conductor connection structure according to a second embodiment of the present invention, and FIG. 7 is a plug-in-out type according to a second embodiment of the present invention. Fig. 8 is a cross-sectional view of an unconnected state of an ultra high voltage cable terminator having a conductor connection structure of FIG. 8, and FIG. 8 shows a plug of a conductor sleeve in an ultra high voltage cable terminator having a conductor connection structure of a plug-in type according to a second embodiment of the present invention. It is a state sectional drawing for out.

As shown in FIG. 6, the second embodiment of the present invention includes an epoxy bushing 100 and a conductor sleeve 201, and the power electrode 111 has an insertion space into which the conductor sleeve 200 can be inserted. The first insertion groove 121a and the second insertion groove 121b are formed in a predetermined position on the inner circumferential surface of the power electrode 111.

The first coil spring 131a is inserted into the first insertion groove 121a, and the second coil spring 131b is inserted into the second insertion groove 121b. Portions of the first and second coil springs protrude from the inner circumferential surface of the power electrode 111.

The first coil spring 131a is made of a material including copper for conducting electricity to the conductor sleeve 201, and the second coil spring 131b is made of stainless steel (SUS) with stiffness.

The first coil spring 131a is for contact possibility only for conducting electricity to the conductor sleeve 201 and does not need to be an inclined coil spring as in the first embodiment of the present invention. Since the second coil spring 131b is used for fixing, an inclined coil spring such as (a) of FIG. 3 is used.

The conductor sleeve 201 is similar to the conductor sleeve of the first embodiment described above. However, at least three fastening grooves 211, 221, and 241 are formed on the outer circumferential surface of the conductor sleeve 201.

The first coil spring 131a and the second coil spring 131b formed on the inner circumferential surface of the power electrode 111 are inserted into the fastening grooves 211, 221, and 241 to fix the conductor sleeve 201 and the power electrode 110. You will be energized.

The operation process of the second embodiment of the present invention constituted as described above is different in that two springs and three circular fastening grooves to which the springs are fastened, as compared with the first embodiment, are substantially the same. .

In the non-connected state as shown in FIG. 7, the conductor sleeve 201 is pushed upward to engage the first fastening groove 211 and the first coil spring 131a as shown in FIG. 6, and the second fastening groove 241 and the second fastening groove 241. When the two coil springs 131b are fastened, the conductor sleeve 201 and the power electrode 111 are in a fixed state that does not fall downward while being energized.

Similarly to the first embodiment of the present invention, if it is pushed further upward in the state of FIG. 6 when maintenance or replacement is necessary, the state of FIG. 8 is obtained. That is, the first coil spring 131a is separated from the first fastening groove 211, and the first coil spring 131a is seated in the second fastening groove 211. In addition, the second coil spring 131b is in a state of being seated in the third fastening groove 221, and then, when the conductor sleeve 201 is pulled downward (in the arrow P direction) of the second coil spring 131b. The direction is changed to the shape as shown in FIG. 8 and is in a state where it can be easily pulled out.

When the conductor sleeve 201 is continuously pulled downward, the conductor sleeve 201 is separated from the power electrode 111 and returned to its original state as shown in FIG. 6.

[Third Embodiment of the Invention] on  According Plug-in -High voltage cable termination box with out-conductor connection structure]

The third embodiment of the present invention is an embodiment used for the electrical connection with the conductor sleeve 202 and the fixing of the conductor sleeve 202 using two coil springs 132a and 132b. One coil spring is a connection spring 132a for electrical connection with the conductor sleeve 202, and the other coil spring is connected to the conductor sleeve 202. It is used as a fixing spring 132b for fixing, and the conductor sleeve 202 is described as an embodiment used for connecting and releasing the conductor sleeve 202 using a fixing ring 242.

9 is a cross-sectional view of a non-high voltage cable terminator having a plug-in-type conductor connection structure according to a third embodiment of the present invention, and FIG. 10 is a plug in-out according to a third embodiment of the present invention. Fig. 11 is a cross-sectional view of a super high voltage cable termination box having a conductor connection structure of the type, and Fig. 11 shows a plug of the conductor sleeve in the high voltage cable termination box having the conductor connection structure of the plug-in type according to the third embodiment of the present invention. It is a state sectional view to out,

Compared to the second embodiment of the present invention shown in Figs. 6 to 8, the third embodiment of the present invention has the same principle, and merely uses a fixing ring to further reinforce the clamping force between the conductor sleeve and the power electrode. Only point is different.

First, referring to FIG. 9, first and second coil springs 132a and 132b are inserted into the first and second insertion grooves 122a and 122b as in the second embodiment. However, unlike the second embodiment, the conductor sleeve 202 has the same first insertion groove 212 and the fixing ring 242 is fastened to the second insertion groove 222.

The fixing ring 242 is moved up and down to change the space of the second insertion groove 222. That is, when the fixing ring 242 moves upward, the second insertion groove 222 has a space formed on the lower side, and when the fixing ring 242 moves downward, the second insertion groove 222 has a space formed on the upper side thereof. In order to perform the fastening, fixing and detachment of the second coil spring (132b).

In the non-fastened state as shown in FIG. 9, when the conductor sleeve 202 is pushed upward, the first coil spring 132a is seated in the first fastening groove 212, as shown in FIG. 10, and then energized. 242 is moved downward while contacting the second coil spring 132b and a predetermined space is formed on the upper side. As the second coil spring 132b is seated in the formed upper space, the conductor sleeve 202 does not fall downward by the second coil spring 132b.

If the conductor sleeve 202 is to be detached in this state, as shown in FIG. 11, when the conductor sleeve 202 is further pushed upward, the second coil spring 132b is positioned on the outer circumferential surface of the fixing ring 242 while the second coil is positioned. While the fixing force is released by the spring 132b, the conductor sleeve 202 is changed into a structure in which the conductor sleeve 202 can be pulled out.

12 is a flowchart illustrating the concept of plug-in-out of a conductor sleeve in an ultra-high voltage cable terminator having a plug-in-type conductor connection structure according to embodiments of the present invention.

12 (a) to 12 (d) are described with reference to the second embodiment of the present invention, the shapes thereof are slightly different, but the principles are the same.

The difference is the difference in the number of fastening grooves formed in the conductor sleeve 203, but one groove can be added to the front end of the first fastening groove 213, if the addition is the same structure as the second embodiment. This is because the presence or absence of the groove is not significant because only the contact for energizing the first coil spring 133a and the conductor sleeve 203 is possible.

The first and second coil springs 123a and 123b are inserted into the first insertion groove 123a and the second insertion groove 123b formed in the power electrode 113 of the epoxy bushing, where the first coil The spring 123a is a general circular coil spring as shown in FIG. 3B, and the second coil spring 123b is an inclined coil spring as shown in FIG. 3A.

First, (a) shows a state before connecting and fixing the power electrode 113 and the conductor sleeve 203.

Subsequently, in order to connect and fix the power electrode 113 and the conductor sleeve 203, as shown in (b), the conductor sleeve 203 is pushed in the arrow direction so that the first fastening groove 213 and the second coil spring 133b are closed. To be tightened. Here, the first coil spring 133a is brought into contact with the outer circumferential surface of the conductor sleeve 203 to be energized, and the direction is changed by the external force.

A state as shown in (b) indicates a state in which the conductor sleeve 203 and the power electrode 113 are energized while being fixed so as not to be detached.

The second coil spring 133b is an inclined coil spring and is restricted by the space of the second insertion groove 123b. In the state of (b), the second coil spring 133b is inserted while being inclined in the left direction. Since the inclined state in the left direction pushes the conductor sleeve 203 in the left direction, the second coil spring 133b and the conductor sleeve 203 may be easily coupled.

In addition, the second coil spring 133b is difficult to change in the inclined direction due to the spatial constraints of the second insertion groove 123b and the first fastening groove 213, which is a conductor of the second coil spring 133b. It means that the sleeve 203 is placed in a fixed state.

Subsequently, when it is necessary to detach the conductor sleeve 203, once pushed in the same direction as in (c), the second coil spring 133b is positioned in the second fastening groove 223.

Since the second fastening groove 223 has a deeper depth than that of the first fastening groove 213, in the state of (c), the second coil spring 133b has a space capable of varying the inclination direction. do.

Subsequently, when pulled in the opposite direction as shown in (d), the second coil spring 133b is applied with an external force in the direction of the arrow in a state in which the inclination direction is variable, while the inclination direction is changed as shown, so that the conductor sleeve 203 is It can be detached.

The fastening groove may have a connection fastening groove for connecting with the coil spring formed at the front end portion, and a fixed fastening groove for fixing fastening with the coil spring may be formed at the next position, and the conductor sleeve is plugged at the last position. A release fastening groove for out may be formed.

(f) is a case where the first coil spring 133a is used as the inclined coil spring, unlike (a) to (d). This case is a structure that can be selected to further reinforce the clamping force by the first coil spring 133a and the second coil spring 133b. While reinforcing the clamping force, the desorption is possible in the same order as in (a) to (d).

Although the present invention as described in detail above has been described on the basis of the limited embodiments and the drawings, the present invention is not limited thereto, and those skilled in the art should understand the present invention. Various modifications and variations are possible within the scope of the spirit and the claims.

However, it will be apparent that such simple modifications and variations are not intended to depart from the scope of the present invention.

100: epoxy bushing
110, 111, 112, 113: power electrode
120a, 120b, 121a, 121b, 122a, 122b, 123a, 123b: insertion groove
Coil Spring: 130a, 130b, 131a, 131b, 132a, 132b, 133a, 133b
200, 201, 202, 203: conductor sleeve
210, 211, 212, 213, 220, 221, 222, 223, 240, 241: fastening groove
242: retaining ring

Claims (14)

delete delete delete An epoxy bushing having a power electrode and a ground electrode formed at upper and lower ends thereof, and a circular coil spring inserted into an insertion groove formed along an inner circumferential surface of the power electrode; And
And a conductor sleeve formed at one end thereof with a conductor insertion portion into which the conductor of the ultra-high voltage cable is inserted and formed with a coupling groove to be engaged with the coil spring along the outer circumferential surface of the other end.
The insertion groove is composed of a pair, the coil spring is composed of a connection spring and a fixed spring,
Three fastening grooves are formed, a connection fastening groove for connecting with the connection spring, a fixed fastening groove for fastening with the fixed spring, and a release fastening groove for plugging out the conductor sleeve,
And the connection spring and the fixed spring are inclined coil springs inclined at a predetermined angle in the winding direction of the coil and coiled. The method of claim 4, wherein
The connection fastening groove and the fixed fastening groove are formed to the same depth, the release fastening groove is formed of a deeper than the connection fastening groove and the fixed fastening groove, the ultra-high voltage cable termination box having a plug-in-type conductor connection structure . An epoxy bushing having a power electrode and a ground electrode formed at upper and lower ends thereof, and a circular coil spring inserted into an insertion groove formed along an inner circumferential surface of the power electrode; And
And a conductor sleeve formed at one end thereof with a conductor insertion portion into which the conductor of the ultra-high voltage cable is inserted and formed with a coupling groove to be engaged with the coil spring along the outer circumferential surface of the other end.
The insertion groove is composed of a pair, the coil spring is formed of a connection spring and a fixed spring,
The fastening groove is composed of two, the connection fastening groove for the connection with the connection spring, the fixing ring is freely movable and is a fixed ring fastening groove for performing the fixed fastening with the fixed spring,
The connection spring is a circular coil spring coiled without inclination in the winding direction of the coil,
The fixed spring is a high voltage cable termination having a plug-in-type conductor connection structure, the inclined coil spring is inclined coiled at an angle in the winding direction of the coil. delete delete delete An epoxy bushing having a power electrode and a ground electrode formed at upper and lower ends thereof, and a circular coil spring inserted into an insertion groove formed along an inner circumferential surface of the power electrode; And
And a conductor sleeve formed at one end thereof with a conductor insertion portion into which the conductor of the ultra-high voltage cable is inserted and formed with a coupling groove to be engaged with the coil spring along the outer circumferential surface of the other end.
The insertion groove is composed of a pair, the coil spring is formed of a connection spring and a fixed spring,
The fastening groove is composed of two, the connection fastening groove for the connection with the connection spring, the fixing ring is freely movable and is a fixed ring fastening groove for performing the fixed fastening with the fixed spring,
And the connection spring and the fixed spring are inclined coil springs inclined at a predetermined angle in the winding direction of the coil and coiled. An epoxy bushing having a power electrode and a ground electrode formed at upper and lower ends thereof, and a circular coil spring inserted into an insertion groove formed along an inner circumferential surface of the power electrode; And
And a conductor sleeve formed at one end thereof with a conductor insertion portion into which the conductor of the ultra-high voltage cable is inserted and formed with a coupling groove to be engaged with the coil spring along the outer circumferential surface of the other end.
The coil spring is wound in a circular track by coiling the wound wire in an inclined form, and is positioned in a specific direction corresponding to the size of the insertion groove and the fastening groove.
And a plug-in-type conductor connection structure in which the direction of the coil spring is changed as the conductor sleeve moves forward and backward. delete delete An epoxy bushing having a power electrode and a ground electrode formed at upper and lower ends thereof, and a circular coil spring inserted into an insertion groove formed along an inner circumferential surface of the power electrode; And
And a conductor sleeve formed at one end thereof with a conductor insertion portion into which the conductor of the ultra-high voltage cable is inserted and formed with a coupling groove to be engaged with the coil spring along the outer circumferential surface of the other end.
The coil spring includes at least one or more inclined coil spring inclined at a predetermined angle in the winding direction of the coil coiled,
Ultra high pressure having a plug-in-type conductor connection structure in which the inclined coil spring is switched in accordance with the moving direction of the fastening groove of the conductor sleeve so that the conductor sleeve can be fastened or released. Cable Termination Box.

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