KR102631783B1 - Apparatus for antireleasing of high voltage cable connector - Google Patents

Abstract

A device for preventing loosening of ultra-high voltage cable connections is disclosed. The device for preventing loosening of the ultra-high voltage cable connection of the present invention is detachably coupled to the ultra-high voltage cable connection connecting the extra-high voltage cable of the oil-borne termination junction box (EB-O), and prevents the ultra-high voltage cable connection from loosening. A pressure plate for preventing loosening that passes through the cable holder and is pressed while being contacted and supported by the non-circular coupling portion of the ultra-high pressure cable connection part; And on the cable holder side, it is fastened to the flange hole formed in the flange coupling part of the ultra-high voltage cable connection through the pressure plate for preventing loosening, and provides a gripping force to the ultra-high voltage cable connection to prevent vibration applied to the ultra-high pressure cable connection. It includes a plurality of anti-vibration fastening members.

Description

Apparatus for antireleasing of high voltage cable connector}

The present invention relates to a device for preventing loosening of extra-high-voltage cable connections. More specifically, the device has an effective structure that can eliminate the phenomenon of loosening of connectors of extra-high-voltage cables. In particular, the compact but simple structure can increase the convenience of installation or maintenance of connections. It relates to a device to prevent loosening of ultra-high voltage cable connections.

An ultra-high voltage cable is a wire that is used to supply power to a desired location through the ground or underground by gathering power lines that supply power into multiple strands and insulating them using synthetic resin.

The connection part (or connection material) for connecting these ultra-high voltage cables can be divided into a joint and a termination depending on the purpose of use.

Intermediate connection boxes include tape-type connection boxes (TJ), prefabricated connection boxes (PJ), pre-molded connection boxes (PMJ), and heterogeneous connection boxes.

In addition, the termination box is divided into an air termination box (EB-A: for outdoor use, anti-fouling), a gas termination box (EB-G), and an oil termination box (EB-O). Among them, the oil termination box (EBO) is similar to the gas termination box, and connects cables and transformers within the oil case. The parts are divided into epoxy bushing, shield ring, rubber stress cone, insulation cylinder, spring compression device, conductor take-off rod, and protection tube.

On the other hand, when applied to ultra-high voltage cables, great caution is required to prevent loosening of the joints of the ultra-high voltage cable. For example, since the extra-high-voltage cable connections for transformers of indoor substations and underground substations of 154,000 volts or more are connected, the connection portion of the extra-high-voltage cable is made of a bolt structure, so there is a high possibility of loosening due to vibration and shaking.

If the bolt forming the ultra-high voltage cable connection is loosened, a fire due to an electric arc may occur in the resulting microscopic gap and the transformer may be destroyed (see Figure 1), resulting in enormous damage to the entire power system. It can happen.

However, no structure or means has yet been applied to prevent the ultra-high voltage cable connection from loosening. However, considering the fact that it is not easy to apply it in practice when adding a device to prevent the loosening of the ultra-high voltage cable connection at a complex structure or at great cost, the need for technology development in this regard arises.

Korea Intellectual Property Office Application No. 10-2017-0067564

The purpose of the present invention is to provide a device for preventing loosening of the connection of an ultra-high voltage cable, which has an effective structure and can eliminate the phenomenon of loosening of the connection of the ultra-high voltage cable, and in particular, can increase the convenience of installation or maintenance of the connection due to its compact but simple structure.

The purpose is to detachably couple to the extra-high-voltage cable connector connecting the extra-high-voltage cable of the end-in-oil junction box (EB-O), and to prevent the extra-high-voltage cable connector from loosening, passing through the cable holder of the extra-high-voltage cable connector. A pressure plate for preventing loosening that is pressed while being contacted and supported by a non-circular coupling portion of the ultra-high voltage cable connection portion; And on the cable holder side, it is fastened to the flange hole formed in the flange coupling part of the ultra-high voltage cable connection through the pressure plate for preventing loosening, and provides a gripping force to the ultra-high voltage cable connection to prevent vibration applied to the ultra-high pressure cable connection. This is achieved by a device for preventing loosening of the ultra-high voltage cable connection, which includes a plurality of anti-vibration fastening members.

The pressure plate for preventing loosening includes a pressure top plate supported in contact with a non-circular coupling portion of the ultra-high pressure cable connection portion; and a lower pressing plate provided in contact with the upper pressing plate, wherein the upper pressing plate and the lower pressing plate may be connected to one body by a plurality of plate connecting members.

It may further include a plurality of anti-loosening copper plates that are interposed between the upper press plate and the lower press plate and prevent the loosening of the anti-loosening press plate by inducing compression of the upper press plate and the lower press plate.

The copper plate for preventing loosening includes a copper plate body having an oval shape; and a plurality of through slits formed through the copper plate body to allow deformation of the copper plate body and reduce the weight of the copper plate body.

The pressurized upper plate includes a pair of unit upper plates divided to form an upper plate passage hole that passes through the cable holder of the ultra-high voltage cable connection unit, and a plurality of first plurality of unit upper plates in which the vibration-prevention fastening members are disposed on the pair of unit upper plates. A top plate hole is formed, a plurality of second top plate holes in which the plate connecting members are disposed are formed around the plurality of first plate holes, and a plurality of copper plates for preventing loosening are disposed on the inner walls of the pair of unit top plates. Two copper plate seat placement portions may be formed.

The plurality of copper plate positioning units may be arranged at equal intervals on the inner wall of the pair of unit top plates.

The pressurizing lower plate includes a pair of unit lower plates divided to form a lower plate passage hole that passes through the cable holder of the ultra-high voltage cable connection unit, and the pair of unit lower plates includes a plurality of first plurality of unit lower plates in which the vibration-prevention fastening members are disposed. A lower plate hole is formed, and a plurality of second lower plate holes in which the plate connecting members are disposed are formed around the plurality of first lower plate holes, and the pressing lower plate in which the copper plate seat arrangement part is disposed may form a closed surface. .

According to the present invention, the phenomenon of loosening of the connection part of an ultra-high voltage cable can be eliminated through an effective structure, and in particular, the compact but simple structure has the effect of increasing the convenience of installation or maintenance of the connection part.

Figure 1 is an image of a transformer accident caused by loosening of an ultra-high voltage cable connection.
Figure 2 is a perspective view of the application state of the device for preventing loosening of the ultra-high voltage cable connection according to the first embodiment of the present invention.
Figure 3 is a front view of Figure 2.
Figure 4 is an exploded view of the device for preventing loosening of the ultra-high voltage cable connection part in Figure 2.
Figure 5 is a front view of Figure 4.
Figure 6 is an enlarged perspective view of the device for preventing loosening of the ultra-high voltage cable connection.
Figure 7 is a planar perspective view of Figure 6.
Figure 8 is an image of the actual product of Figure 7.
Figure 9 is an enlarged view of area A of Figure 7.
Figure 10 is an image of the actual product for Figure 9.
Figure 11 is an exploded view of the copper plate for preventing loosening in Figure 7.
Figure 12 is an exploded perspective view of Figure 7.
Figure 13 is a bottom perspective view of Figure 12.
Figure 14 is an enlarged perspective view of a copper plate for preventing loosening.
Figure 15 is a front view of Figure 14.
Figure 16 is a schematic installation cross-sectional view of the copper plate area for preventing loosening in the device for preventing loosening of the ultra-high voltage cable connection according to the second embodiment of the present invention.
Figure 17 is a schematic installation cross-sectional view of the copper plate area for preventing loosening in the device for preventing loosening of the ultra-high voltage cable connection according to the third embodiment of the present invention.
Figure 18 is a side structural diagram of the anti-loosening copper plate shown in Figure 17.
Figure 19 is a perspective view of the application of the device for preventing loosening of the ultra-high voltage cable connection according to the fourth embodiment of the present invention.
Figure 20 is an enlarged view of the main part of Figure 19.
Figure 21 is a perspective view of the pressurized upper plate.
Figure 22 is an enlarged plan view of the unit top plate of Figure 22.
Figure 23 is a perspective view of the pressurized lower plate.
Figure 24 is an enlarged plan view of the lower unit plate of Figure 23.

Below, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. However, since the description of the present invention is only an example for structural or functional explanation, the scope of the present invention should not be construed as limited by the examples described in the text. In other words, since the embodiments can be modified in various ways and can have various forms, the scope of rights of the present invention should be understood to include equivalents that can realize the technical idea. In addition, the purpose or effect presented in the present invention does not mean that a specific embodiment must include all or only such effects, so the scope of the present invention should not be understood as limited thereby.

The meaning of terms described in the present invention should be understood as follows.

When a component is referred to as being “connected” to another component, it should be understood that it may be directly connected to the other component, but that other components may also exist in between. On the other hand, when a component is referred to as being “directly connected” to another component, it should be understood that there are no other components in between. Meanwhile, other expressions that describe the relationship between components, such as "between" and "immediately between" or "neighboring" and "directly neighboring" should be interpreted similarly.

Singular expressions should be understood to include plural expressions, unless the context clearly indicates otherwise, and terms such as “comprise” or “have” refer to the specified features, numbers, steps, operations, components, parts, or them. It is intended to specify the existence of a combination, and should be understood as not excluding in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

All terms used herein, unless otherwise defined, have the same meaning as commonly understood by a person of ordinary skill in the field to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as consistent with the meaning they have in the context of the related technology, and cannot be interpreted as having an ideal or excessively formal meaning unless clearly defined in the present invention.

Now, embodiments of the present invention will be described in detail with reference to the drawings. In the description of the embodiments, the same reference numerals are assigned to the same components.

Figure 2 is a perspective view of the application state of the device for preventing loosening of the ultra-high voltage cable connection according to the first embodiment of the present invention, Figure 3 is a front view of Figure 2, Figure 4 is an exploded view of the device for preventing loosening of the ultra-high voltage cable connection in Figure 2; 5 is a front view of FIG. 4, FIG. 6 is an enlarged perspective view of the device for preventing loosening of the ultra-high voltage cable connection, FIG. 7 is a perspective view of the planar state of FIG. 6, FIG. 8 is an image of the actual product of FIG. 7, and FIG. 9 is an enlargement of area A of FIG. 7. 10 is an image of the actual product of FIG. 9, FIG. 11 is an exploded view of the anti-loosening copper plate in FIG. 7, FIG. 12 is an exploded perspective view of FIG. 7, FIG. 13 is a bottom perspective view of FIG. 12, and FIG. 14 is an anti-loosening copper plate. An enlarged perspective view of FIG. 15 is a front view of FIG. 14 .

Referring to these drawings, the device 100 for preventing loosening of the ultra-high voltage cable connection according to the present embodiment has an effective structure that can eliminate the phenomenon of loosening of the connection portion 30 of the ultra-high voltage cable 20, and in particular, has a compact but simple structure, so that the connection portion 30 ) to increase the convenience of installation or maintenance. This ultra-high-voltage cable joint loosening prevention device 100 can be coupled to the ultra-high-voltage cable joint 30 of the oil termination junction box (EB-O, 10) as shown in FIGS. 2 and 3.

Briefly looking at the ultra-high voltage cable connection unit 30, the ultra-high voltage cable connection unit 30 is a means for connecting the ultra-high voltage cable 20 coupled to the oil termination junction box (EB-O, 10).

This ultra-high voltage cable connection unit 30 includes a cable holder 31 that secures the ultra-high voltage cable 20. The cable holder 31 consists of a stepped cylindrical structure. Brackets 32 are coupled to both sides of the cable holder 31.

To fix the cable holder 31, the non-circular coupling portion 33, the circular coupling portion 34, and the flange coupling portion 35 are sequentially coupled. The non-circular coupling portion 33 is made of a hexagonal structure, and the circular coupling portion 34 has a larger volume than the non-circular coupling portion 33.

Additionally, the flange coupling portion 35 is a structure with a larger diameter than the circular coupling portion 34. This flange coupling portion 35 is coupled to the oil end connection box (EB-O, 10) with a plurality of bolts (B). At this time, a plurality of flange holes 36 are formed around the bolts B. The flange hole 36 forms a place where the ultra-high voltage cable connection prevention device 100 according to this embodiment is coupled. The flange hole 36 is also effective in that it is not formed separately.

On the other hand, if only this ultra-high voltage cable connection part 30 is applied, it is inevitably vulnerable to vibration and shaking as described above. Therefore, there is a high possibility that the bolt (B) of the ultra-high voltage cable connection part 30 may loosen from time to time. If the bolt (B) is loosened and the ultra-high voltage cable connection part 30 is loosened, an electric arc (electrical spark) will occur in the resulting fine air gap. A fire may occur and the transformer may be destroyed as shown in FIG. 1, which may cause enormous damage to the entire power system. Therefore, there is a need to prevent this, and for this purpose, the ultra-high voltage cable connection part loosening prevention device 100 according to this embodiment is applied. In particular, the apparatus 100 for preventing loosening of the connection part of the ultra-high voltage cable according to the present embodiment has an effective structure that can eliminate the phenomenon of loosening the connection part 30 of the ultra-high voltage cable 20, and has a compact but simple structure, so it is easy to install the connection part 30. Or, it can improve the convenience of maintenance.

The ultra-high-voltage cable connection preventing device 100 according to the present embodiment, which can provide such effects, includes an ultra-high-voltage cable connection ( It is detachably coupled to 30) to prevent loosening of the ultra-high voltage cable connection portion 30, and may include a pressure plate 110 for preventing loosening and a fastening member 150 for preventing vibration.

The pressure plate 110 for preventing loosening is a structure that passes through the cable holder 31 of the ultra-high voltage cable connection portion 30 and is pressed while being contacted and supported by the non-circular coupling portion 33 of the ultra-high voltage cable connection portion 30. That is, when fastening the anti-vibration fastening member 150, the anti-loosening pressure plate 110 may be pressed while being contacted and supported by the non-circular coupling portion 33 of the ultra-high pressure cable connection portion 30. Accordingly, the ultra-high voltage cable connection portion 30 is prevented from loosening due to vibration.

In this embodiment, the pressure plate 110 for preventing loosening is implemented with two parts. That is, the pressure plate 110 for preventing loosening includes a pressure upper plate 120 that is in contact with and supported by the non-circular coupling portion 33 of the ultra-high pressure cable connection portion 30, and a lower pressure plate 130 provided in contact with the pressure upper plate 120. . Although the upper pressure plate 120 and the lower pressure plate 130 are manufactured with similar structures, they are not completely identical.

The pressurized upper plate 120 includes a pair of unit upper plates 122 divided to form an upper plate passage hole 121 that passes through the cable holder 31 of the ultra-high voltage cable connection unit 30. The structure of the pair of unit top plates 122 is the same. Therefore, the convenience of manufacturing increases.

A plurality of first top plate holes 123 in which vibration-prevention fastening members 150 are disposed are formed in the pair of unit top plates 122. The first top plate holes 123 are arranged at equal intervals. A plurality of second upper plate holes 124 in which plate connection members 140 are disposed are formed around the plurality of first upper plate holes 123.

The pressurized lower plate 130 includes a pair of unit lower plates 132 that are divided to form a lower plate passage hole 131 that passes through the cable holder 31 of the ultra-high voltage cable connection unit 30. The structure of the pair of unit lower plates 132 is also the same. Therefore, the convenience of manufacturing increases.

A plurality of first lower plate holes 133 in which vibration-prevention fastening members 150 are disposed are formed in the pair of unit lower plates 132. The first lower plate holes 133 are arranged at equal intervals. A plurality of second lower plate holes 134 in which plate connecting members 140 are disposed are formed around the plurality of first lower plate holes 133.

A plurality of plate connection members 140 are provided to connect the pressurized upper plate 120 and the pressurized lower plate 130 into one body. The plate connecting member 140 is a combination of bolts and nuts, and is a means of integrally connecting the pressurized upper plate 120 and the pressurized lower plate 130 into one body. A plurality of second upper plate holes 124 and second lower plate holes 134 are formed in the pressing upper plate 120 and the lower pressing plate 130 so that a plurality of plate connecting members 140 can be used.

At this time, when applying the pressure upper plate 120 and the lower pressure plate 130, it is difficult if the upper pressure plate 120 and the lower pressure plate 130 come loose. For this purpose, a plurality of anti-loosening copper plates 160 are applied to prevent the pressurized upper plate 120 and the pressurized lower plate 130 from coming loose.

A plurality of anti-loosening copper plates 160 are interposed between the pressurized upper plate 120 and the pressurized lower plate 130, and induce compression of the pressurized upper plate 120 and the pressurized lower plate 130 to prevent the loosening of the anti-loosening pressing plate 110. It plays a deterrent role.

The anti-loosening copper plate 160 includes a copper plate body 161 having an oval shape and a plurality of plates formed through the copper plate body 161 to allow deformation of the copper plate body 161 and reduce the weight of the copper plate body 161. Includes a through slit (162). The sizes of the through slits 162 may be different.

To apply this anti-loosening copper plate 160, a plurality of copper plate placement portions 125 in which the anti-loosening copper plates 160 are positioned are formed on the inner wall of the pressurized upper plate 120. A plurality of copper plate positioning portions 125 are arranged at equal intervals on the inner wall of the pair of unit upper plates 122.

At this time, the copper plate placement portions 125 have a structure where the top and bottom are open. However, the pressurizing lower plate 130 on which the copper plate positioning portion 125 is disposed forms a closed surface 130a as shown in FIGS. 9 and 10. Accordingly, the anti-loosening copper plate 160 disposed in the copper plate positioning portions 125 can perform its function without falling out of place. The head of the fastening bolt 38 that fastens the non-circular coupling portion 33 shown in FIG. 4 is pressed against the anti-loosening copper plate 160. When the anti-loosening copper plate 160 is made of a soft copper metal, it is strongly tightened. , while preventing the pressurized upper plate 120 and the pressurized lower plate 130 from being loosened arbitrarily, the fastening bolts 38 that fasten the non-circular coupling portion 33 are also prevented from being arbitrarily loosened due to vibration.

Meanwhile, the anti-vibration fastening member 150 is a type of fastening member that is fastened to the flange hole 36 formed in the flange coupling portion 35 of the ultra-high voltage cable connection portion 30 through the pressure plate 110 for preventing loosening on the cable holder 31 side. It's a long bolt.

These anti-vibration fastening members 150 serve to prevent vibration applied to the ultra-high voltage cable connection portion 30 by providing a holding force to the ultra-high voltage cable connection portion 30. A plurality of anti-vibration fastening members 150 may be arranged at equal intervals to apply uniform pressure.

Accordingly, after preparing the device 100 for preventing loosening of the ultra-high voltage cable connection portion as shown in FIGS. 4 and 5, the loosening phenomenon of the ultra-high voltage cable connection portion 30 is effectively prevented by simply fixing it to the ultra-high voltage cable connection portion 30 as shown in FIGS. 2 and 3. It can be eliminated. In particular, it has the advantage of being able to be assembled and installed regardless of the bolt location and shape of the existing connection part.

According to this embodiment, which operates based on the structure described above, it is possible to eliminate the phenomenon of loosening of the connection part 30 of the ultra-high voltage cable 20 with an effective structure, and in particular, because it has a compact but simple structure, it is easy to install or install the connection part 30. Convenience in maintenance can be improved.

Figure 16 is a schematic installation cross-sectional view of the copper plate area for preventing loosening in the device for preventing loosening of the ultra-high voltage cable connection according to the second embodiment of the present invention.

Referring to this drawing, in this embodiment as well, the pressure plate 210 for preventing loosening includes two parts, namely, an upper pressure plate 220 and a lower pressure plate 230. Then, a copper plate placement portion 225 is formed on the pressurized top plate 220, where the copper plate 160 for preventing loosening is placed.

At this time, the copper plate positioning portion 225 includes a straight section portion 225a whose side wall has a straight shape and a copper plate 160 for preventing loosening, and the width increases from the end to the top of the straight section portion 225a. It includes a curved section 225b that gradually narrows.

When the copper plate placement portion 225 is composed of a straight section 225a and a curved section 225b as in the present embodiment, the copper plate 160 for preventing loosening is forcibly inserted into the copper plate location portion 225. There is an advantage that the anti-loosening copper plate 160 does not fall off arbitrarily.

Even if this embodiment is applied, the phenomenon of loosening of the connection part 30 of the ultra-high voltage cable 20 can be eliminated with an effective structure, and in particular, the convenience of installation or maintenance of the connection part 30 can be increased due to the compact but simple structure.

Figure 17 is a schematic installation cross-sectional view of the copper plate area for preventing loosening in the device for preventing loosening of the ultra-high voltage cable connection according to the third embodiment of the present invention, and Figure 18 is a side structural diagram of the copper plate for preventing loosening shown in Figure 17.

Referring to these drawings, in this embodiment as well, the pressure plate 210 for preventing loosening includes two parts, namely, an upper pressure plate 220 and a lower pressure plate 230. In addition, a copper plate positioning portion 225 in which the anti-loosening copper plate 360 is positioned is formed on the pressurized upper plate 220, and the copper plate positioning portion 225 is divided into a straight section 225a and a curved section 225b. It comes true.

Meanwhile, in this structure, the copper plate body 361 of the anti-loosening copper plate 360 forms an upwardly convex arc shape when viewed from the side. In this way, when the anti-loosening copper plate 360 is made of an arc-shaped anti-loosening copper plate 360, it can more effectively contribute to preventing the loosening of surrounding structures.

Even if this embodiment is applied, the phenomenon of loosening of the connection part 30 of the ultra-high voltage cable 20 can be eliminated with an effective structure, and in particular, the convenience of installation or maintenance of the connection part 30 can be increased due to the compact but simple structure.

Figure 19 is a perspective view of the application of the device for preventing loosening of the ultra-high voltage cable connection according to the fourth embodiment of the present invention, Figure 20 is an enlarged view of the main part of Figure 19, Figure 21 is a perspective view of the pressurized top plate, and Figure 22 is a view of the unit top plate of Figure 22. An enlarged plan view, FIG. 23 is a perspective view of the pressurized lower plate, and FIG. 24 is an enlarged plan view of the unit lower plate of FIG. 23.

Referring to these drawings, the apparatus 400 for preventing loosening of the ultra-high voltage cable connection according to this embodiment also includes a pressure plate 410 for preventing loosening and a fastening member 450 for preventing vibration.

Like the first embodiment described above, the pressure plate 410 for preventing loosening includes two parts, that is, a pressure upper plate 420 and a lower pressure plate 430 provided in contact with the upper pressure plate 420. Although the upper pressure plate 420 and the lower pressure plate 430 are manufactured with similar structures, they are not completely identical.

A plurality of anti-vibration fastening members 450 are applied to assemble or fix the pressurized upper plate 420 and the pressurized lower plate 430.

The anti-vibration fastening member 450 is a means of fixing the anti-loosening pressure plate 410 while preventing the anti-loosening pressure plate 410 from loosening. The anti-vibration fastening member 450 includes an anti-vibration fastening screw 451 and a washer 452 that supports the anti-vibration fastening screw 451. Washer 452 is a flat washer.

The pressurized upper plate 420 includes a pair of divided unit upper plates 422. The structure of the pair of unit top plates 422 is the same. Therefore, the convenience of manufacturing increases.

The unit top plate 422 has a plurality of screw holes 423 to which the anti-vibration fastening screws 451 of the anti-vibration fastening member 450 are coupled, and a long hole-type groove for installation of the bolt fastening compression unit 490 ( 424). A plurality of long groove portions 424 are provided on the inner peripheral surface of the unit top plates 422, but their sizes are different from each other.

The pressurizing lower plate 430 also includes a pair of unit lower plates 432, like the pressing upper plate 420. The structure of the pair of unit lower plates 432 is the same. Therefore, the convenience of manufacturing increases.

The unit lower plates 432 are formed with a plurality of long holes 433 through which the anti-vibration fastening screw 451 of the anti-vibration fastening member 450 passes, while supporting the washer 452. The position and number of long holes 433 formed in the lower unit plate 432 are the same as the positions and number of screw holes 423 formed in the upper unit plate 422.

Additionally, a bracket interference prevention groove 434 is formed on the inner peripheral surface of the unit lower plate 432. The bracket interference prevention groove 434 allows the bracket 32 to be placed without interference as shown in FIG. 19. In addition, a unit passage hole 425 through which the bolted tightening compression unit 490 passes is formed in the unit lower plate 432. The unit passage hole 425 may be formed as many as the number of bolted tightening compression units 490.

A plurality of bolted tightening compression units 490 are provided to additionally fix the pressure plate 410 for preventing loosening, which is composed of the upper pressure plate 420 and the lower pressure plate 430.

The bolt-fastening tightening pressing unit 490 serves to tighten and secure the pressurized upper plate 420 and the pressurized lower plate 430 so that the pressurized upper plate 420 and the pressurized lower plate 430 are not separated arbitrarily. That is, the bolted tightening compression unit 490 has a screw structure and is inserted into the unit passage hole 425 formed in the unit lower plates 432 of the pressurizing lower plate 430, and then inserted into the unit upper plate of the pressing upper plate 420. It is fastened to the screw fastening boss 495 formed in the upper structure through the long hole-shaped groove portion 424 formed in 422.

As a result, the bolted tightening compression unit 490 provides a double bolt or nut effect along with the anti-vibration fastening member 450, so that the bolts are loosened due to vibration or the pressurized upper plate 420 and the pressurized lower plate 430 are separated. prevent it from happening. In other words, it is possible to prevent the bolt from loosening due to vibration or the pressurizing upper plate 420 and the pressing lower plate 430 from being separated even without the anti-loosening copper plate 160 introduced in the first embodiment.

Even if this embodiment is applied, the phenomenon of loosening of the connection part 30 of the ultra-high voltage cable 20 can be eliminated with an effective structure, and in particular, the convenience of installation or maintenance of the connection part 30 can be increased due to the compact but simple structure.

As such, the present invention is not limited to the described embodiments, and it is obvious to those skilled in the art that various modifications and changes can be made without departing from the spirit and scope of the present invention. Therefore, it should be said that such modifications or variations fall within the scope of the claims of the present invention.

10: oil termination box 20: ultra-high voltage cable
30: ultra-high voltage cable connection part 31: cable holder
32: bracket 33: non-circular coupling part
34: circular coupling part 35: flange coupling part
36: Flange hole 100: Loosening prevention device
110: Pressure plate to prevent loosening 120: Pressure top plate
121: Top plate passage hole 122: Unit top plate
123: first top plate hole 124: second top plate hole
125: Copper plate seat arrangement 130: Pressurized lower plate
130a: Closed side 131: Lower plate passage hole
132: Unit lower plate 133: First lower plate hole
134: Second lower plate hole 140: Plate connection member
150: Fastening member to prevent vibration 160: Copper plate to prevent loosening
161: copper plate body 162: through slit

Claims (7)

It is detachably coupled to the ultra-high pressure cable connection part connecting the extra-high pressure cable of the oil termination junction box (EB-O), and prevents loosening of the ultra-high pressure cable connection part,
A pressure plate for preventing loosening that passes through the cable holder of the ultra-high voltage cable connection portion and is pressed while being contacted and supported by a non-circular coupling portion of the ultra-high voltage cable connection portion; and
A plurality of devices are fastened to the flange hole formed in the flange coupling portion of the ultra-high voltage cable connection portion through the pressure plate for preventing loosening on the cable holder side, and provide a holding force to the ultra-high voltage cable connection portion to prevent vibration applied to the ultra-high pressure cable connection portion. Includes a fastening member to prevent vibration of the dog,
The pressure plate for preventing loosening is,
A pressurized upper plate contacted and supported by the non-circular coupling portion of the ultra-high voltage cable connection portion; and
It includes a pressurized lower plate provided in contact with the pressurized upper plate,
The pressurized upper plate and the pressurized lower plate are connected into one body by a plurality of plate connecting members,
Unscrewing the ultra-high voltage cable connection, characterized in that it further includes a plurality of anti-loosening copper plates interposed between the upper press plate and the lower press plate, and preventing the loosening of the anti-loosening press plate by inducing compression of the upper press plate and the lower press plate. prevention device. delete delete According to paragraph 1,
The copper plate for preventing loosening is,
Copper plate body forming an oval shape; and
An apparatus for preventing loosening of an ultra-high voltage cable connection, comprising a plurality of through slits formed through the copper plate body to allow deformation of the copper plate body and reduce the weight of the copper plate body. According to paragraph 1,
The pressurized upper plate includes a pair of unit upper plates divided to form an upper plate passage opening that passes through the cable holder of the ultra-high voltage cable connection part,
A plurality of first upper plate holes in which the vibration-prevention fastening members are disposed are formed in the pair of unit upper plates, and a plurality of second upper plate holes in which the plate connecting members are disposed are formed around the plurality of first upper plate holes, ,
An apparatus for preventing loosening of an ultra-high voltage cable connection, characterized in that a plurality of copper plate positioning portions in which the anti-loosening copper plates are positioned are formed on the inner wall of the pair of unit top plates. According to clause 5,
An apparatus for preventing loosening of an ultra-high voltage cable connection, characterized in that the plurality of copper plate positioning portions are arranged at equal intervals on the inner wall of the pair of unit top plates. According to clause 5,
The pressurized lower plate includes a pair of unit lower plates divided to form a lower plate passage opening that passes through the cable holder of the ultra-high voltage cable connection part,
A plurality of first lower plate holes in which the anti-vibration fastening members are disposed are formed in the pair of unit lower plates, and a plurality of second lower plate holes in which the plate connecting members are disposed are formed around the plurality of first lower plate holes, ,
An apparatus for preventing loosening of an ultra-high voltage cable connection, characterized in that the pressurizing lower plate on which the copper plate seat arrangement part is disposed forms a closed surface.

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