KR102123158B1 - pre-mold sleeve assembling device for ultra high voltage power cable - Google Patents

Abstract

The present invention relates to a pre-mold sleeve inserter of an ultra-high voltage cable capable of pulling and connecting cables of various thicknesses as well as being able to connect cables at various heights due to free height adjustment.

Description

Pre-mold sleeve assembling device for ultra high voltage power cable}

The present invention relates to a pre-mold sleeve inserter of an ultra-high-voltage cable, and in particular, it is possible to freely adjust the height and perform cable connection work at various heights as well as free of an ultra-high-voltage cable capable of pulling and connecting cables of various thicknesses. It relates to a mold sleeve inserter.

When connecting the power cable from the supply source to the demand destination, it is designed to be installed while connecting at a certain distance, and this connection part is generally constructed with a structure in which a connection box is separately installed to easily connect the cables and minimize losses due to the connection.

In particular, in recent years, ultra-high voltage cables have been used a lot, and in this ultra-high voltage cable connection method, a connection using a room temperature shrinking silicone pre-mould has been performed, which is mainly used as an ultra-high voltage cable connection method due to shortening of the connection time and excellent electrical characteristics. have.

The method of connecting a high voltage cable using a shrinkable silicone premold is to form a through hole in the longitudinal direction inside the silicone premold of rubber material to insert and fix the cable. The diameter of the cable inserted into the through hole of the silicone premold is a through hole. If it is larger than the diameter, it is difficult to insert it directly into the through hole, so make the silicone pre-mold in an expanded state before inserting the cable.

There are various technologies related to this, and examples thereof include patent documents 1 to 2.

Patent Document 1 is used as a jig for connecting and inserting a pre-molded unit of silicon material, which is a reinforced insulating material for a high-voltage power cable pre-molded junction box, and is made of a metal material, the inner and outer surfaces are coated with Teflon, and the outer side is formed in a tapered shape inclined at a predetermined angle. The inclined portion and the cylindrical portion having a predetermined inner and outer diameter extending from the tip portion of the inclined portion include an inner body with an ultra-high voltage power cable inserted therein and a pre-mold unit inserted outside, and an inner side of the inclined portion with a power cable. It is a Teflon cone for inserting a pre-molded unit of an ultra-high voltage power cable PMJ, in which a conductor insertion part into which a conductor is inserted is further formed,

Patent Document 2 is a corona shield made of a conductive metal coupled between a conductor sleeve and a pre-mold unit for conductor connection of an ultra-high voltage power cable. It is formed in the shape of a circle, and both ends of each of the upper and lower corona shields are formed by protruding two first and second supporting walls inward, and being fitted to the insulator of the power cable between the first and second supporting walls. A groove is formed, four fastening protrusions are formed on the lower surface of the first or second support wall of the upper corona shield, four fastening grooves are formed on the upper surface of the first or second support wall of the lower corona shield, and fastening is fastened The groove is a corona shield of a pre-mold junction box forcibly fitted and fitted with a high voltage power cable.

There are various high-voltage cable connection technologies, and these technologies are used to easily connect thick ultra-high-voltage cables in a connection box, and there is patent document 3 as a related technology.

Patent Document 3 is an apparatus for assembling a pre-mold unit of an ultra-high voltage power cable pre-mold junction box, having a pair of upper and lower seats of a cylindrical shape for fixing both ends of the pre-mold unit, and an upper seating portion having a semicircle shape and a lower part The seating portion has the first and second lower seating portions in a half-circle shape, and the upper seating portion and the first and second lower seating portions are fastened by clamps on the left and right sides, and the clamp is double-refracted. It has a shape, and is fastened in a form surrounding the upper seating portion and the side surfaces of the first and second lower seating portions, and a fixed support bar supported by connecting clamps at both ends is fastened, and ultra-high voltage electric power is formed with a chain block connector to which the chain block is connected. It is a pre-mold unit assembly device for cable pre-mold junction box.

However, such a conventional ultra-high voltage cable assembly device is not adjustable in height, so when connecting a wire from a high place, it takes a lot of time to prepare the cable connection work as the other structures must be supported on the lower part. The width and inner diameter of the clamps that hold the cable are different, and there is a disadvantage in that the clamp must be replaced frequently depending on the thickness of the cable.

Republic of Korea Registered Patent No. 10-1411111 Republic of Korea Registered Patent No. 10-1566973 Republic of Korea Registered Patent No. 10-1578846

The present invention was developed to solve the problems of the prior art as described above, and the height adjustment is free, so that not only can the cable connection work at various heights, but also the ultra high voltage cables capable of pulling and connecting cables of various thicknesses It is an object to provide a pre-mold sleeve inserter.

The pre-mold sleeve inserter of the ultra-high voltage cable according to the present invention for solving the above object is in the inserter for pulling the end of the cable to be connected to the pre-mold sleeve, in the spring to be radially movable around the center A clamp supported elastically by the clamp, a clamp support supporting the clamp and the spring, a support bar installed between the clamp supports such that two clamp supports are positioned at a spaced apart distance, and a cable installed on one side of the clamp support A traction means including a traction hook to which one end of the traction wire is fixed; It is characterized in that it comprises a lift installed on the lower portion of the traction means to adjust the height of the traction means.

The lift includes an upper fixing plate in which a fixing plate installed under the traction means is detachably installed; A bellows installed between the upper fixing plate and the base plate, and hingedly coupled to a plurality of rotating members; A screw shaft formed with a screw thread meshing with threads formed on two operating shafts installed in the bellows; And an operation handle installed at one end of the screw shaft to rotate the screw shaft by rotating, thereby rotating the rotating member to adjust the height of the upper fixing plate by adjusting the distance between the operating shafts.

It is preferable that a support insertion groove is formed on an outer wall facing the clamp support of the clamp so that the clamp moves radially along the support.

A guide rod is installed inside the clamp support opposite to the clamp, a guide hole is formed on the outer circumferential surface of the clamp, and the spring can be installed in the guide hole.

It is preferable that the clamp support is separated into an upper plate and a lower plate, and assembled by tightening a fixing bolt into a fixing hole formed up and down on the upper plate and the lower plate.

The pre-mold sleeve inserter of the ultra-high voltage cable according to the present invention is provided with a clamp elastically supported by a spring, so that the cable of various diameters can be towed by fixing the cable in a compressed state, thereby replacing the clamp. As it can be reduced, there is an effect to increase workability.

In addition, the present invention also has the effect of making it easy to connect the cables at various heights by providing a lift whose height is freely adjusted by rotation of the handle.

1 is a perspective view of an example of a pre-mold sleeve inserter of an ultra-high voltage cable according to the present invention
Figure 2 is an exploded perspective view of an example of a pre-mold sleeve inserter of an ultra-high voltage cable according to the present invention
Figure 3 is a front view of the traction means constituting the pre-mold sleeve inserter of the ultra-high voltage cable according to the present invention
Figure 4 is an exploded perspective view of the traction means constituting the pre-mold sleeve inserter of the ultra-high voltage cable according to the present invention

The present invention can be applied to various changes and can have various embodiments, and specific embodiments are illustrated in the drawings and will be described through detailed description. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

In describing each drawing, similar reference numerals are used for similar components. In the description of the present invention, if it is determined that a detailed description of known technologies related to the present invention may obscure the subject matter of the present invention, the detailed description will be omitted.

In the present invention, the height adjustment is free, so that not only the cable connection work can be performed at various heights, but cables of various thicknesses can be towed and connected.

The pre-mold sleeve inserter of the ultra-high voltage cable according to the present invention is for allowing the end of the cable to be connected to the pre-mold sleeve by pulling the end of the cable, as shown in FIGS. A clamp 11 elastically supported by (11s), a clamp support (12) supporting the clamp and the spring, and a support bar installed between the clamp supports so that two clamp supports are positioned at positions spaced apart by a predetermined distance. (13), a traction means (10) installed on one side of the clamp support and including a traction hook (14) to which one end of the cable traction wire is fixed; It is installed on the lower portion of the traction means includes a lift 20 for adjusting the height of the traction means.

The traction means 10 is a means for supporting the cable to be pulled to be moved in a certain direction, and the clamp 11 bites and fixes the cable.

That is, a plurality of the clamp 11 is installed as shown in Figs. 1 to 4, and is elastically supported by a spring 11s, one end of which is supported by the clamp support 12, and the clamp supported in this way (11) After pushing outward, inserting the cable between the clamps, and then releasing the clamp, the clamps move as they move toward the center, and the cable acts as a bite to fix the cable.

As the clamp 11 is supported by the spring 11s, the distance between the clamps can be adjusted, and accordingly, cables of various thicknesses can be fixed.

In addition, it is preferable that a support insertion groove 11g is formed on an outer wall facing the clamp support of the clamp 11 so that the clamp moves radially along the support.

That is, as shown in FIG. 4, the width of the support insertion groove 11g is formed to be the same as the thickness of the clamp support 12, so that the clamp moves radially while the inner end of the clamp support is fitted into the support insertion groove 11g. As it becomes possible, the clamp can be firmly radially turned so as not to be shaken.

In addition, a guide rod 11r is installed inside the clamp support 12 facing the clamp, a guide hole is formed on the outer circumferential surface of the clamp 11, and the spring 11s is installed in the guide hole. have.

As described above, as the guide rod 11r and the support insertion groove 11g for guiding the direction in which the clamp moves are formed, the clamp can move more stably and radially.

In addition, the clamp support 12 is preferably composed of an upper plate (12u) and a lower plate (12d) by separating up and down as shown in Figure 4, the upper and lower fixing holes in the separated upper and lower plates ( 12h) is formed, it is preferable to assemble by fixing the fixing bolt (12b) to this fixing hole.

Thus, by assembling the clamp support separated into the upper plate and the lower plate using the fixing bolt, it is possible to prevent the clamp support from being twisted by the force applied to the side in the process of pulling the cable.

As described above, the cable fixed by the clamp can be installed at various heights according to the installation environment, and it is preferable to adjust the height of the traction means 10 according to the height of the cable installed at various heights. In order to provide the lift 20 is provided.

The lift 20 may be implemented by various modifications, but was configured as shown in FIGS. 1 and 2 in order to be able to move up and down more easily.

That is, the lift 20 includes an upper fixing plate 21 in which a fixing plate 10p installed under the traction means is detachably installed; A bellows 22 installed between the upper fixing plate and the base plate 20b, and hingedly coupled to a plurality of rotating members 22p; A screw shaft 23 formed with a screw thread meshed with a screw thread formed in the two working shafts 22b installed in the bellows; And an operation handle 24 installed on one end of the screw shaft to rotate the screw shaft by rotating, thereby rotating the rotating member to adjust the height of the upper fixing plate by adjusting the distance between the operating shafts.

In the lift configured as described above, the rotational direction of the screw shaft changes according to the rotational direction of the operation handle 24, and when rotated in one direction, the bellows become smaller as the distance between the two operation shafts 22b is narrowed by the screw shaft. When extended, the upper fixing plate 21 rises upward, and when rotated in reverse, the bellows contract as the distance between the two working shafts 22b increases by the screw shaft, and the upper fixing plate 21 descends.

Accordingly, the height of the traction means 10 installed detachably on the upper fixing plate is adjusted.

The lower end of any one of the plurality of rotating members 22p constituting the bellows 22 is guided to be moved in a predetermined direction by a guide means 22g fixed to the base plate 20b.

10: traction means 10p: fixed plate
11: Clamp 11g: Support insertion groove
11r: Guide rod 11s: Spring
12: Clamp support 12b: Assembly bolt 12h: Assembly hole
12u: top plate 12d: bottom plate
13: support bar
14: towing hook
15: Cable end guide
20: lift 20b: base plate
21: upper fixing plate
22: bellows 22p: rotation member
22b: operating shaft 22g: guide means
23: Screw shaft
24: operating handle

Claims (5)

In the inserter for pulling the end of the cable to be able to connect to the pre-mold sleeve,
A clamp 11 elastically supported by a spring 11s to be radially movable around the center, a clamp support 12 for supporting the clamp and the spring, and two clamp supports at positions spaced apart a predetermined distance A traction means (10) including a support bar (13) installed between the clamp supports so as to be positioned, and a traction hook (14) installed on one side of the clamp support and fixed to one end of the cable traction wire; It is installed on the lower portion of the traction means includes a lift 20 for adjusting the height of the traction means,
The lift 20 includes an upper fixing plate 21 in which a fixing plate 10p installed at a lower portion of the traction means is detachably installed; A bellows 22 installed between the upper fixing plate and the base plate 20b, and hingedly coupled to a plurality of rotating members 22p; A screw shaft 23 formed with a screw thread meshed with a screw thread formed in the two working shafts 22b installed in the bellows; And an operation handle 24 installed at one end of the screw shaft to rotate the screw shaft by rotating to adjust the distance between the working shafts to rotate the rotating member to adjust the height of the upper fixing plate,
A pre-mold sleeve inserter for an ultra-high voltage cable, characterized in that a support insertion groove (11g) is formed on an outer wall facing the clamp support of the clamp (11) so that the clamp moves radially along the support . delete delete According to claim 1,
A guide rod 11r is installed inside the clamp support 12 facing the clamp, a guide hole is formed on the outer circumferential surface of the clamp 11, and the spring 11s is installed in the guide hole. Pre-mold sleeve inserter of ultra-high pressure cable. According to claim 1,
The clamp support 12 is separated into an upper plate (12u) and a lower plate (12d), and the ultra-high voltage cable characterized in that the assembly by tightening the fixing bolt (12b) to the fixing hole (12h) formed up and down on the upper and lower plates Pre-mold sleeve inserter.

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