KR102548257B1 - Cable fixing apparatus for underground power transmission line - Google Patents

Abstract

The present invention is provided to protect the connection unit of a cable from moisture or water, and may support the cable in a zigzag manner to provide self-protection. The cable may be supported with a reinforcing net body and a soft tube coupled to both sides of the outer cover to protect the same from vibration or shock in all directions. Moisture or water may be more certainly prevented from being introduced into the gap between the inner circumferential surface of the soft tube and the outer circumferential portion of the outer cover. A vertical fixing bar with vertical elasticity may be fixed at a manhole to damp vibration or impact delivered in a vertical direction, such that left and right cables may be protected from vertical vibration or impact. To this end, the present invention comprises: an outer cover; a funnel-shaped tube; and a support means.

Description

Cable fixing apparatus for underground power transmission line {Cable fixing apparatus for underground power transmission line}

The present invention relates to a cable fixing device for an underground transmission line in the field of power transmission technology, and more specifically, to protect the connection part of the left and right cables from moisture or water, and to protect the left and right cables from vibration or shock by themselves. It is attenuated so that it can be protected by itself, and the left and right cables are supported on the soft tube, and the soft tube is reinforced by the reinforcing mesh to prevent damage to the soft tube, and in all directions by the flexibility of the soft tube and the elastic force of the reinforcing mesh. It is possible to protect the left and right cables by attenuating vibration or shock, and to more reliably prevent moisture or water from entering between the inner circumference of the soft tube and the outer circumference of the outer cover. It relates to a cable fixing device for an underground transmission line capable of attenuating vibration or impact transmitted in the vertical direction by fixing to a manhole by a vertical fixing bar to protect left and right cables from vertical vibration or impact.

In general, 22.9kV extra-high voltage is supplied to consumers such as apartment houses, large buildings, or industries from substations built for each region, and each consumer uses it after converting it to 220V or 380V through its own transformer.

Substations are mostly installed on the ground, but as the danger of high voltage wires being exposed to the outside has emerged, the number of substations installed underground is increasing due to collective civil complaints and harming the city's aesthetics.

In this way, when the substation is installed underground, in the process of installing the transmission line, it is frequently cut according to the surrounding topography and then reconnected and used.

In addition, if the length of the initially designed transmission line is longer depending on site conditions, it often occurs that more transmission lines must be connected.

In this case, there is a problem in that a connection part of the transmission line is easily damaged, and water penetrates, causing an electric leakage or a short circuit.

As a prior art that improves these problems, Korean Patent Registration No. 10-0674262 (February 2, 2007) discloses a "substation high-voltage cable connection part leakage prevention structure".

However, in Korean Patent Registration No. 10-0674262, since two high-voltage cables are only fixed to a moisture barrier pipe by a fastening band, the connected portion is easily separated according to contraction and relaxation due to temperature change as well as external pressure. there is.

As a prior art to solve this problem, Korean Patent Registration No. 10-2315996 (October 18, 2021) connects two transmission and distribution lines using first and second covers, and moisture or water penetrates into the connected part along with insulation. A "transmission and distribution line connecting device in a substation" is disclosed which prevents the fastening band from moving due to external force, etc., so that the coupled state of the transmission and distribution lines to the first and second covers is stably maintained.

However, Korean Patent Registration No. 10-2315996 discloses a connecting member (nut) fastened to a fastening protrusion (screw) by an earthquake or vibration transmitted from a nearby construction site, and an adjusting member fastened to a connector (bolt) penetrating an elastic bar ( nut) is easily loosened, preventing the movement of the fastening band by the movement preventing part properly, and as a result, it is impossible to prevent moisture or water from penetrating into the two transmission and distribution lines, which is a problem in achieving the intended purpose. there is

As a prior art for solving these problems, Korean Patent Registration No. 10-2403590 (May 25, 2022) "Cable fixing device for underground transmission line connected to transformer" is

A technology that prevents moisture or water from penetrating into the connection of the left and right transmission lines to prevent short circuits or short circuits, and ensures that the left and right transmission lines are always firmly and safely supported against earthquakes or vibrations transmitted from nearby construction sites. are starting

However, Korean Patent Registration No. 10-2403590 discloses that the left and right tubes of the left and right protective covers are formed of thermoplastic resin and contracted by applying heat, closely adhering to the outer circumferential surfaces of the left and right transmission lines to prevent leakage and leakage due to moisture and water. Short circuits are reliably prevented and the transmission line is firmly and safely supported, but it does not have a configuration that absorbs or damps the vibration acting in the longitudinal direction of the transmission line, and the support for simply supporting the transmission line is fixed to the manhole. There is a possibility that connection failure or disconnection may occur.

In addition, since the left and right plates and the left and right tubes constituting the left and right protective covers are joined by adhesive, fusion, or ultrasonic bonding, the joint is separated by external vibration or shock over time and the gap There is a concern that the left and right protective covers may lose their functions due to penetration of moisture and water, making it impossible to protect the transmission line.

Republic of Korea Patent Registration No. 10-0674262 (2007.02.02.) "Substation high voltage cable connection part leakage prevention structure" Korean Patent Registration No. 10-2315996 (2021.10.18.) "Transmission and distribution line connection device of substation" Republic of Korea Patent Registration No. 10-2403590 (May 25, 2022) "Cable Fixing Device for Underground Transmission Line Connected to Transformer"

Accordingly, an object of the present invention is to provide a cable fixing device for an underground transmission line that can protect the connection parts of left and right cables from moisture or water.

Another object of the present invention is to provide a cable fixing device for an underground transmission line in which left and right cables can be self-protected by attenuating vibration or impact on their own.

Another object of the present invention is to prevent damage to the soft tube by supporting the left and right cables on the soft tube and reinforcing the soft tube with a reinforcing mesh, and to prevent omnidirectional vibration or vibration by the flexibility of the soft tube and the elastic force of the reinforcing mesh. It is intended to provide a cable fixing device for an underground transmission line capable of attenuating impact and protecting left and right cables.

Another object of the present invention is to provide a cable fixing device for an underground transmission line that can more reliably prevent moisture or water from entering between the inner circumferential surface of the soft tube and the outer circumferential surface of the outer cover.

In addition, another object of the present invention is to attenuate vibration or shock transmitted in the vertical direction by fixing the vertical fixing bar having elasticity in the vertical direction to the manhole, thereby protecting the left and right cables from vertical vibration or impact. It is intended to provide a cable fixing device for an underground transmission line.

In order to achieve the above object, the present invention provides an outer cover in which a connection part connecting exposed conductors of left and right cables by compression of a connection sleeve is located inside; a funnel-type tube having tube extensions coupled to both ends of the outer cover, and a tube neck portion that decreases in diameter toward the outside and covers the left and right cables; A horizontal support bar in which support rings are integrally formed at the left and right ends, a one-way bearing in which an outer ring is press-fitted to the support ring, and a cylindrical shaft in which a keyway is formed on the inner circumferential surface and a tool coupling part is formed on the upper end, , A round bar having an outer diameter larger than the inner diameter of the cylindrical shaft and a support rod having a male screw portion formed at the top of the round bar with an outer diameter smaller than the inner diameter of the cylindrical shaft, and a key projection corresponding to the keyway is formed on the outer circumferential surface and is inserted into the cylindrical shaft, and the male screw portion is formed on the inner circumferential surface. A nut formed with a female screw part fastened to, an upper coupling part formed at the lower end of the round bar, a pair of left and right half rings each having a semicircular groove surrounding the tube neck, and a pair of half rings formed at the upper end of the half ring and coupled to the upper coupling part A cable fixing device for an underground transmission line comprising: an inner cover coupled to both ends of an outer cover and having a cable guide rod for guiding left and right cables in a zigzag shape; A reinforcing net having a mesh extension portion covered by the tube extension portion and a mesh network neck portion written on the tube neck portion; It further includes a tightening band for fastening the tube extension and the net extension to the outer cover, and a plurality of ring-shaped outer convex convex parts are formed on the outer circumferential surface of both ends of the outer cover, the tube is formed of soft synthetic resin, and the ring-shaped outer circumference is formed on the inner circumferential surface of the tube extension. The ring-shaped inner convex part corresponding to the convex part is formed, and the tube neck part is compressed to the left and right cables by the compression sleeve, and the convex height and convex depth of the ring-shaped inner convex part are formed to be larger than the convex depth and convex height of the ring-shaped outer convex part. When tightened by the tightening band, the convex portion of the ring-shaped inner convex portion is compressed in the normal direction and expanded in the longitudinal direction so that the ring-shaped inner convex portion is closely adhered to the ring-shaped outer convex portion. provide the device.

In addition, the support means further includes a vertical fixing bar having an upper end fixed to the manhole and a horizontal support bar coupled to the lower end. It may be configured to include an elevating cylinder fixed to the horizontal support bar and having an inward flange formed at the top, and upper and lower compression coil springs inserted between the outer flange and the horizontal support bar and between the outer flange and the inward flange.

According to the cable fixing device of the underground transmission line of the present invention, since the connection parts of the left and right cables are located on the inner upper side of the outer cover, even if a certain amount of water penetrates, the connection parts of the left and right cables can be protected without being submerged. .

In addition, according to the cable fixing device of the underground transmission line of the present invention, the left and right cables are guided by the cable support rod inside the inner cover, and when viewed from the connection part, the left and right cables extend downward with the horizontal part and the downward bent part. Since it is formed in a zigzag shape including a part, an upward bending part, an upward extension part, a horizontal bending part, and a horizontal extension part, the left and right cables can be themselves protected by attenuating vibration or impact transmitted in the longitudinal direction.

In addition, according to the cable fixing device of the underground transmission line of the present invention, the soft tube is coupled to both sides of the outer cover, the left and right cables are supported on the soft tube, and the soft tube is reinforced by a reinforcing net formed of a material having excellent elasticity. In addition to preventing damage to the tube, it is possible to protect the left and right cables by attenuating vibration or impact in all directions by the flexibility of the soft tube and the elastic force of the reinforcing net.

In addition, the reinforcing net is formed of a metal material with excellent elasticity, and is configured by welding a plurality of ring-shaped materials and curved materials or by bending a perforated plate formed with a plurality of perforations in a metal plate having excellent elasticity, so the elasticity may be limited depending on the direction Compared to the case formed of a whole plate, the elastic force is not restricted depending on the direction, and the elastic force is applied in all directions, so that the left and right cables can be effectively protected.

In addition, according to the cable anchoring device for the underground transmission line of the present invention, the outer cover and the soft tube are coupled in a state in which the ring-shaped outer main convex portion and the ring-shaped inner main convex portion are engaged, and the convex height and recessed depth of the ring-shaped outer main convex portion are It is formed larger than the convex depth and convex height, covered with a reinforcing net, and tightened by a tightening band, so that the iron part of the ring-type inner convex part is compressed in the normal direction and expanded in the longitudinal direction, so that the ring-type inner convex part is closely attached to the ring-type outer convex part. The close contact between the inner circumferential surface of the expanded portion of the soft tube and the outer circumferential portion of the outer cover can more reliably prevent moisture or water from entering.

In addition, according to the cable fixing device of the underground transmission line of the present invention, the horizontal support bar coupled to the outer cover and the vertical fixing bar connecting the manhole are fixed to the manhole, and the support rod formed with the outward flange at the bottom and the support rod are covered so as to be able to move up and down, and at the top An elevating cylinder with an inward flange, an upper compression coil spring inserted between the inward flange and the outer flange, and a lower compression coil spring inserted between the outward flange and the horizontal support bar are formed to have elasticity in the vertical direction, so that the horizontal Since the support bar and the outer cover are installed elastically in the vertical direction, vibration or impact transmitted from the outside in the vertical direction can be damped, and thus the left and right cables can be protected from vertical vibration or impact.

1 to 7 show a preferred embodiment of a cable fixing device for an underground transmission line according to the present invention,
1 and 2 are exploded perspective views of a cable fixing device for an underground transmission line according to the present invention;
3 is a perspective view showing a state in which the cable is fixed;
4 to 7 are perspective views showing cable fixing according to the present invention.

Hereinafter, a cable fixing device for an underground transmission line according to the present invention will be described in detail according to preferred embodiments illustrated in the accompanying drawings.

1 to 7 show a preferred embodiment of a cable fixing device for an underground transmission line according to the present invention.

The connection part (C) of the left and right cables (1, 2) is in a state where the exposed conductors (1b, 2b) are brought into contact with each other by peeling off the insulation coatings (1a, 2a) of the inner ends of the left and right cables (1, 2). It is made by covering the connection sleeve 10 and pressing it so that the conductors 1a and 2a are electrically and mechanically connected.

The connection sleeve 10 can be compressed to the exposed conductors 1b and 2b using a compression machine commonly used for wire connection.

The connection portion C including the connection sleeve 10 is protected by an epoxy sleeve 20 covering the connection sleeve 10 and a portion of the insulation coatings 1a and 2a adjacent to the connection sleeve 10.

The epoxy sleeve 20 is formed longer than the connection sleeve 10 and shrinks by applying heat, closely adhering to the connection sleeve 10 as well as the insulation coatings 1a and 2a on both sides thereof to form the connection part C. will protect

The cable fixing device of the underground transmission line of the present invention is formed symmetrically with the outer cover 100 made of hard synthetic resin in which the connection part C of the left and right cables 1 and 2 is located inside, and the outer cover 100 ) and a pair of inner covers 200 made of a hard synthetic resin coupled to the left and right sides.

The outer cover 100 is formed in a cylindrical shape in which female screw parts 110 are formed on the inner circumferential surface, and is provided with ring-shaped outer convex portions 120 formed at both left and right ends of the outer circumferential surface.

In the upper center of the outer cover 100, a coupling plate 130 for coupling to the lower end of the vertical fixing bar 510 to be described later is integrally formed.

The inner cover 200 is formed in a cylindrical shape with a male screw part 210 fastened to the female screw part 110 formed on the outer circumferential surface, and is formed on the inside to support the left and right cables 1 and 2, respectively. 220) is provided.

The cable guide bar 220 is provided with two upper and lower cables to support the left and right cables 1 and 2 in a zigzag shape.

The cable anchoring device for an underground transmission line according to the present invention includes a pair of soft tubes 300 formed of soft synthetic resin, coupled to both left and right ends of an outer cover 100, and symmetrical between the left and right sides.

The soft tube 300 includes a tube extension part 311 covered on the outer circumferential surfaces of both left and right ends of the outer cover 100, and a tube neck part 312 covered by the left and right cables 1 and 2 whose diameter decreases as it goes outward. ), and is formed on the inner circumferential surface of the tube extension part 311 and is provided with a ring-shaped inner main convex portion 320 engaged with the ring-shaped outer main convex portion 120.

The cable fixing device of the underground transmission line of the present invention is formed of a metal material with excellent elasticity to reinforce the soft tube 300, and is covered on the outer periphery of the tube extension part 311 and the tube neck part 312 Reinforcing net (400) ).

The reinforcing network 400 is formed in a funnel shape having a network extension 411 and a network neck 412 corresponding to the tube extension 311 and the tube neck 312 of the soft tube 300 .

The reinforcing network 400 may be formed of a metal material with excellent elasticity, and since the elasticity may be limited depending on the direction in which it is formed as a whole plate, a plurality of ring-shaped materials and curved materials may be welded or a plurality of perforations in a metal plate having excellent elasticity It is preferable to configure by bending the perforated plate formed.

The tube extension part 311 of the soft tube 300 and the mesh extension part 411 of the reinforcing mesh 400 are tightened by the tightening band 420.

The tightening band 420 is covered on the mesh extension 411 of the reinforcing mesh 400, and a C-shaped band 421 having a partially cut and bent coupling piece 422 at the cut end, and the coupling piece 422 It includes a tightening bolt 423 passing through and a tightening nut 424 fastened to the tightening bolt 423.

When the tightening bolt 423 and the tightening nut 424 are tightened in a state where the tightening band 420 is covered with the mesh extension 411 of the reinforcing mesh 400, the mesh extension 411 of the reinforcing mesh 400 is soft It is tightened to the tube extension part 311 of the tube 300, and the tube extension part 311 of the soft tube 300 is in close contact with both left and right ends of the outer circumferential surface of the outer cover 100.

At this time, the convex height and convex depth of the ring-shaped inner main convex portion 320 are greater than the convex height and concave depth of the ring-shaped outer main convex portion 120, so that the right and left ends of the outer circumferential surface of the soft tube 300 are fastened to the tightening band 420. When tightened, the convex portion of the ring-shaped inner convex portion 320 is compressed in the normal direction and expanded in the longitudinal direction, so that the ring-shaped inner convex portion 320 closely adheres to the ring-shaped outer convex portion 120 and is a soft tube. It is configured to more reliably prevent moisture or water from entering between the inner circumference of the tube extension part 311 of 300 and the outer circumference of the outer cover 100.

In addition, the mesh body neck portion 412 of the reinforcing net body 400 is compressed to the tube neck portion 312 of the soft tube 300 by the compression sleeve 430, and the tube neck portion 312 is the left and right cables 1 , 2) is tightly pressed against the outer circumferential surface of the tube neck portion 312 and the outer circumferential surface of the left and right cables 1 and 2 are configured to prevent moisture or water from entering.

On the other hand, the cable fixing device of the underground transmission line of the present invention prevents the left and right cables 1 and 2 from sagging, and also prevents vibration or shock applied to the manhole from being transmitted to the left and right cables 1 and 2 It further includes a support means 500 for preventing.

The support means 500 includes a vertical fixing bar 510 having an upper end fixed to a manhole (not shown); A horizontal support bar 520 having a middle portion coupled to the lower end of the vertical fixing bar 510 and integrally formed with support rings 521 at left and right ends; a one-way bearing 530 in which the outer ring 531 is press-fitted to the support ring 521; A cylindrical shaft 540 press-fitted to the inner ring 532 of the one-way bearing 530, having a plurality of key grooves 541 formed on the inner circumferential surface and having a tool coupling part 542 formed on the outer circumferential surface of the upper end; A round bar 551 having an outer diameter larger than the inner diameter of the cylindrical shaft 540, and a support bar 550 having a male threaded portion 552 formed with an outer diameter smaller than the inner diameter of the cylindrical shaft 540 at the upper end of the round bar 551, and ; A nut 560 inserted into the cylindrical shaft 540, having a plurality of key protrusions 561 corresponding to the key groove 541 formed on the outer circumferential surface, and having a female screw portion 562 fastened to the male screw portion 552 on the inner circumferential surface. and; an upper coupling part 570 formed at the lower end of the round bar 551, in which coupling protrusions 571 and coupling grooves 572 are alternately formed, and a blocking plate 573 is formed at the outer end; a pair of left and right half rings 580 having semicircular grooves 581 surrounding the tube neck portion 112; It is formed on the upper end of the half ring 580 and has a coupling groove 591 and a coupling protrusion 592 coupled to the coupling protrusion 571 and the coupling groove 572 by force-fitting, and a lower coupling portion 590 formed thereon. .

The vertical fixing bar 510 has an upper end fixed to a manhole (not shown) and is covered with a support bar 511 having an outward flange 512 formed at the lower end and a support bar 511 that can be moved up and down and attached to the horizontal support bar 520 The lift cylinder 513 is fixed and has an inward flange 514 formed at the upper end, and an upper portion inserted between the outward flange 512 and the horizontal support bar 520 and between the outward flange 512 and the inward flange 514. , and includes lower compression coil springs 515 and 516.

A fixing plate 517 for fixing to the manhole is coupled to the upper end of the support rod 511.

In assembling the support rod 511 and the elevating cylinder 513, the upper compression coil spring 515, the support rod 511, and the lower compression coil spring 516 are sequentially inserted into the elevating cylinder 513 from the bottom, and then the support rod 511 ) to the upper end of the fixing plate 517.

The fixing plate 517 may be coupled by fastening a bolt to a screw hole formed on an upper surface of the support bar 511 by penetrating a bolt from top to bottom.

At the lower end of the elevating cylinder 513, a coupling plate 518 for coupling to the horizontal support bar 520 is formed.

The outer cover 100, the vertical support bar 510, and the horizontal support bar 520 may be simultaneously coupled by bolts 523 and nuts 524.

That is, the bolt 523 is passed through the coupling plate 518 of the vertical support bar 510, the coupling plate 130 of the horizontal support bar 520 and the outer cover 100, and the nut 524 is attached to the bolt 523. ) By fastening the outer cover 100 and the vertical support bar 510 and the horizontal support bar 520 can be combined at the same time.

In the one-way bearing 530, the support ring 521, which is a first member to which the outer ring 531 is press-fitted, and the cylindrical shaft 540, which is a second member to which the inner ring 532 is press-fitted, mutually rotate in one direction (clockwise in the drawing). Since a typical one-way bearing capable of rotating only is used, detailed illustration and description thereof will be omitted.

The tool coupling part 542 of the cylindrical shaft 540 may be configured as a hexagonal head as shown in the illustration, but may also be configured as a square head.

A locking jaw 553 is formed between the upper end of the round bar 551 formed with an outer diameter larger than the inner diameter of the cylindrical shaft 540 and the lower end of the male threaded portion 552, and the lower end of the cylindrical shaft 540 is attached to the locking jaw 553. It is made to span the sides.

A pair of half rings 580 are coupled by penetrating a bolt 583 and fastening a nut 584, and also compress the compression sleeve 430 compressed to the mesh network portion 412.

The upper coupling portion 570 and the lower coupling portion 590 correspond to the coupling protrusion 571 with the coupling groove 591 and the coupling groove 572 with the coupling protrusion 592 corresponding to each other by relatively moving them sideways. can be combined

Hereinafter, a process of fixing the cable of the underground transmission line by the cable fixing device of the underground transmission line according to the present invention will be described.

In the disassembled state as shown in FIGS. 1 and 2, the male screw part 210 of the inner cover 200 is fastened to the female screw part 110 of the outer cover 100, and the inner cover ( 200) is inserted and coupled.

The left and right cables 1 and 2 are passed through the inner cover 200, the soft tube 300, the reinforcing net 400, and the compression sleeve 430.

The insulation coatings (1a, 2a) of the opposite ends of the left and right cables (1, 2) are peeled off to partially expose the conductors (1b, 2b), and the left and right cables (1, 2) are removed from the inner cover (200). ), but the exposed conductors (1b, 2b) are positioned outside the inner cover (200).

The connection sleeve (10) is covered on the exposed conductors (1b, 2b) of the left and right cables (1, 2) and compressed so that the conductors (1b, 2b) are electrically and mechanically connected to form the connection portion (C). form

The epoxy sleeve 20 is covered on the connection sleeve 10 and heat is applied so that the epoxy sleeve 20 is contracted and brought into close contact with the connection sleeve 10 .

At this time, since the length of the epoxy sleeve 20 is formed longer than the length of the connection sleeve 10, the epoxy sleeve 20 is connected not only to the connection sleeve 10 but also to the insulation coatings 1a and 2a adjacent to both ends of the connection sleeve 10. ), it is possible to prevent penetration of moisture or water into the exposed conductors 1b and 2b.

The connection part (C) of the left and right cables (1, 2) is pushed into the inner cover (200), and the left and right cables (1, 2) are guided by the cable guide bar (220) and bent in a zigzag shape. .

The soft tube 300 through which the left and right cables 1 and 2 pass is moved toward the outer cover 100 so that the tube extension 311 is covered on both ends of the outer cover 100, but the ring-shaped inner convex portion ( 320) engages the ring-shaped outer main convex portion 120.

The reinforcing mesh 400 through which the left and right cables 1 and 2 have passed is moved toward the soft tube 300 so that the soft tube 300 is covered, and the mesh extension 411 extends the tube extension 311 In this, the mesh network portion 412 corresponds to the tube neck portion 312.

Move the tightening band 420 through which the left and right cables 1 and 2 pass toward the reinforcing mesh 400 so that it is covered with the mesh extension 411, and fasten the tightening bolt 423 and the tightening nut 424 By tightening, the tightening band 420 tightens the mesh extension part 411, and the mesh extension part 411 is tightened to the tube extension part 311, and the tube extension part 311 tightens the left and right outer cover 100. By tightening the outer circumferential surface of both ends, it is possible to prevent moisture or water from entering between the outer circumferential surface of the outer cover 100 and the inner circumferential surface of the tube extension part 311.

The compression sleeve 430 through which the left and right cables 1 and 2 have passed is moved toward the reinforcing net 400 so that it is covered with the net neck portion 412, and then compressed so that the compression sleeve 430 is the mesh net neck portion 412. ) is compressed, and the mesh network portion 412 compresses the tube neck portion 312, and the tube neck portion 312 compresses the outer peripheral surfaces of the left and right cables 1 and 2, resulting in a tube neck Intrusion of moisture or water between the portion 312 and the outer circumferential surfaces of the left and right cables 1 and 2 can be prevented.

The half ring 580 is moved toward the mesh body neck portion 412 so that the semicircular groove 581 surrounds the compression sleeve 430, and the pair of half rings 580 are tightened by fastening the bolt 583 and the nut 584. At this time, a pair of half rings 580 to be tightened are compressed to the compression sleeve 430, so that the half rings 580 are fixed to the mesh neck portion 412 through the compression sleeve 430 (see FIG. 4).

The lower coupling part integrally formed on the upper part of the half ring 580 by moving the support bar 550 and the upper coupling part 570 integrally formed on the lower part of the round bar 551 constituting the support bar 550 toward the half ring 580. The upper coupling part 570 and the lower coupling part 590 by engaging the coupling groove 591 and the coupling protrusion 592 of the 590 and the coupling protrusion 571 and the coupling groove 572 of the upper coupling portion 570 The half ring 580 and the support rod 550 are coupled through (see FIG. 5).

The external thread 531 is integrally formed on the support bar 550 in the cylindrical shaft 540 press-fitted into the inner ring 532 of the one-way bearing 530 in which the outer ring 531 is press-fitted into the support ring 521 of the horizontal support bar 520 ( 552) from the bottom (see Fig. 5).

In addition, a nut 560 is inserted into the cylindrical shaft 540 from the top so that the key protrusion 561 is inserted into the keyway 541 of the cylindrical shaft 540 (see FIG. 6).

When the cylindrical shaft 540 is turned in the tightening direction (clockwise direction in the drawing) by hooking a tool such as a spanner on the tool coupling part 542 of the cylindrical shaft 540, the cylindrical shaft 540 rotates in the tightening direction, and the groove The nut 560, in which the key protrusion 561 is engaged with the 541, rotates in the tightening direction, and accordingly, the nut 560 is attached to the male screw part 552 by the screwing action between the nut 560 and the male screw part 552. It will move downward as it engages.

The rotation and downward movement of the nut 560 in the tightening direction continues until the lower surface of the nut 560 touches the locking jaw 553 between the upper end of the round bar 551 and the lower end of the male threaded portion 552.

If the cylindrical shaft 540 is turned a little more in a state where the lower surface of the nut 560 is in contact with the locking jaw 553, the nut 560 and the male screw part 552 are fastened, and the male screw part 552 and the nut ( 560), the support bar 550, the male screw part 552, the nut 560, the cylindrical shaft 540, and the inner ring 532 of the one-way bearing 530 are firmly coupled (see FIGS. 7 and 3). ).

In this state, the cylindrical shaft 540 can rotate only in the fastening direction by the one-way bearing 530 and cannot rotate in the loosening direction, so even if the cylindrical shaft 540 is turned in the loosening direction, it does not rotate, and the nut ( 560 is not loosened from the male threaded portion 552 of the support bar 550.

As a result, the left and right cables (1, 2) are connected to the outer cover 100, the inner cover 200, the soft tube 300, the reinforcing net 400, the horizontal support bar 520, the one-way bearing 530, and the cylindrical shaft. 540, the support bar 550, the nut 560, the upper coupling portion 570, the half ring 580, and the lower coupling portion 590 to be supported.

In this state, cable fixing according to the present invention can be completed by coupling the horizontal support bar 520 to the vertical support bar 510 fixed to the manhole.

In assembling the vertical support bar 510, the upper compression coil spring 515, the support rod 511, and the lower compression coil spring 516 are sequentially inserted into the elevating cylinder 513 from the bottom, and then placed at the top of the support rod 511. Attach the fixing plate 517.

The fixing plate 517 may be coupled by fastening a bolt to a screw hole formed on an upper surface of the support bar 511 by penetrating a bolt from top to bottom.

The fixing plate 517 can be fixed to the manhole by penetrating the protruding anchor bolt buried in the manhole and fastening the nut.

A bolt 523 is passed through the coupling plate 518 formed at the lower end of the elevating cylinder 513, the horizontal support bar 520, and the coupling plate 130 of the outer cover 100, and the nut 524 is inserted into the bolt 523. ) By fastening the outer cover 100 and the vertical support bar 510 and the horizontal support bar 520 can be combined at the same time.

This completes the fixing of the cable according to the present invention.

According to the present invention, the following protection effects can be obtained in a state in which the cable is fixed.

① Since the connection part (C) of the left and right cables (1, 2) is located on the inside upper side of the outer cover 100, even if some amount of water penetrates, the connection part (C) of the left and right cables (1, 2) can be protected from flooding.

② When the left and right cables (1, 2) are guided by the cable support bar (220) inside the inner cover (200) and viewed from the connection part (C) as a standard, the left and right cables (1, 2) are at the horizontal part. Since the left and right cables (1, 2) are formed in a zigzag shape including the downward bending part, the downward extension part, the upward bending part, the upward extension part, the horizontal bending part, and the horizontal extension part, the vibration transmitted in the longitudinal direction by itself However, it can protect itself by attenuating the impact.

③ The soft tube 300 is coupled to both sides of the outer cover 100, the left and right cables 1 and 2 are supported on the soft tube 300, and the soft tube 300 is a reinforcing mesh formed of a material with excellent elasticity. By reinforcing by 400, it is possible to prevent damage to the soft tube 300, and attenuate omnidirectional vibration or impact by the flexibility of the soft tube 300 and the elastic force of the reinforcing net 400, so that the left and right cables (1, 2) can be protected.

In addition, the reinforcing net 400 is formed of a metal material with excellent elasticity, and is configured by welding a plurality of ring-shaped materials and curved materials or by bending a perforated plate formed with a plurality of perforations in a metal plate having excellent elasticity, so that the elasticity is limited depending on the direction. Compared to the case formed of a plate that can be formed, the elastic force is not limited according to the direction, and the elastic force is applied in all directions, so that the left and right cables 1 and 2 can be effectively protected.

④ The outer cover 100 and the soft tube 300 are combined in a state in which the ring-shaped outer convex portion 120 and the ring-shaped inner convex portion 320 are engaged, and the convex height and recess depth of the ring-shaped inner convex portion 320 are The convex part of the ring-shaped outer main convex part 320 is compressed in the normal direction by forming it larger than the convex depth and convex height of the ring-shaped outer main convex part 120, covering the reinforcing net 400, and tightening by the tightening band 420, It expands in the longitudinal direction so that the ring-shaped inner convex portion 320 closely adheres to the ring-shaped outer convex convex portion 120, so that moisture passes between the inner circumference of the tube extension 311 of the soft tube 300 and the outer circumference of the outer cover 100. This will make it more secure to prevent water ingress.

⑤ The horizontal support bar 520 coupled to the outer cover 100 and the vertical fixing bar 510 connecting the manhole are fixed to the manhole, and a support rod 511 having an outward flange 512 formed at the bottom, and a support rod 511 An elevating cylinder 513 covered to be able to move up and down and having an inward flange 514 formed at the top, an upper compression coil spring 515 inserted between the inward flange 514 and the outward flange 512, and an outward flange 512 ) And the lower compression coil spring 516 inserted between the horizontal support bar 520 is formed to have elasticity in the vertical direction, so the horizontal support bar 520 and the outer cover 100 are elastic in the vertical direction. It is installed so that vibration or impact transmitted from the outside in the vertical direction can be damped, and thus the left and right cables 1 and 2 can be protected from vertical vibration or impact.

In addition, as a general effect, the exposed conductors 1b and 2b of the left and right cables 1 and 2 are compressed and connected by the connection sleeve 10, and the epoxy sleeve 20 is heated and adhered thereon. Accordingly, the penetration of moisture or water into the connection portion (C) can be prevented.

Like Korean Patent Registration No. 10-2403590, which is a prior art, vibration is transmitted from an earthquake or a nearby construction site while the left and right cables 1 and 2 and the outer cover 100 are supported by the support means 500, When force is applied to the shaft 540 and the nut 560 in the counterclockwise direction, that is, in the loosening direction, the nut 560 is rotated together with the cylindrical shaft 540 by the keyway 541 and the key protrusion 561 Since the cylindrical shaft 540 is rotatably supported only in the tightening direction, that is, clockwise, with respect to the horizontal support bar 520 by the one-way bearing 530, the cylindrical shaft 540 and the nut 560 There is no loosening, and the outer cover 100 protecting the left and right cables 1 and 2, the soft tube 300, and the reinforcing net 400 are always firmly and safely supported with respect to the support means 500. can be maintained as

In the above, the present invention has been described as a preferred embodiment illustrated in the drawings, but the present invention is not limited by the description and drawings of the illustrated embodiments, and those skilled in the art within the technical spirit and claims of the present invention Of course, various modifications may be made by.

1, 2: Cable C: Connection
10: connection sleeve 20: epoxy sleeve
100: outer cover 120: ring-shaped outer main convex part
200: inner cover 220: cable guide bar
300: soft tube 320: ring-type inner main convex part
400: reinforcing mesh 500: support means
510: vertical fixing bar 520: horizontal support bar
530: one-way bearing 540: cylindrical shaft
550: support bar 560: nut
570: upper coupling part 580: half ring
590: lower coupling part

Claims (2)

delete an outer cover in which a connection part connecting the exposed conductors of the left and right cables by compression of the connection sleeve is located inside; a funnel-type tube having tube extensions coupled to both ends of the outer cover, and a tube neck portion that decreases in diameter toward the outside and covers the left and right cables; A horizontal support bar in which support rings are integrally formed at the left and right ends, a one-way bearing in which an outer ring is press-fitted to the support ring, and a cylindrical shaft in which a keyway is formed on the inner circumferential surface and a tool coupling part is formed on the upper end, , A round bar having an outer diameter larger than the inner diameter of the cylindrical shaft and a support rod having a male screw portion formed at the top of the round bar with an outer diameter smaller than the inner diameter of the cylindrical shaft, and a key projection corresponding to the keyway is formed on the outer circumferential surface and is inserted into the cylindrical shaft, and the male screw portion is formed on the inner circumferential surface. A nut formed with a female screw part fastened to, an upper coupling part formed at the lower end of the round bar, a pair of left and right half rings each having a semicircular groove surrounding the tube neck, and a pair of half rings formed at the upper end of the half ring and coupled to the upper coupling part In the cable fixing device of an underground transmission line comprising a; supporting means having a lower coupling part,
an inner cover coupled to both ends of the outer cover and having cable guide rods for guiding left and right cables in a zigzag pattern; A reinforcing net having a mesh extension portion covered by the tube extension portion and a mesh network neck portion written on the tube neck portion; A tightening band that tightens the tube extension and the mesh extension to the outer cover; It further includes, a plurality of ring-shaped outer convex parts are formed on the outer circumferential surface of both ends of the outer cover, the tube is formed of soft synthetic resin, and a ring-shaped inner main convex part corresponding to the ring-shaped outer convex part is formed on the inner circumferential surface of the tube extension part, and the tube neck portion is formed. The left and right cables are compressed by the compression sleeve, and the convex height and convex depth of the ring-type outer convex part are made larger than the convex depth and convex height of the ring-type outer convex part, so that when tightened by the tightening band, the convex part of the ring-type inner convex part It is compressed in the normal direction and expanded in the longitudinal direction so that the ring-shaped inner convex portion is closely adhered to the ring-shaped outer convex portion,
The support means further includes a vertical fixing bar having an upper end fixed to the manhole and a horizontal support bar coupled to the lower end,
The vertical fixing bar is a support rod with an upper end fixed to a manhole and an outward flange formed at the bottom, an elevating cylinder covered with a support rod capable of being lifted and fixed to a horizontal support bar and an inward flange formed at the top, and an outward flange and a horizontal support bar. A cable fixing device for an underground transmission line, characterized in that it comprises upper and lower compression coil springs inserted between the outer flange and the inner flange.

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