KR102229839B1 - Footrest ladder for polymer insulator maintenance - Google Patents

Abstract

According to the present invention, disclosed is a footrest ladder for polymer insulator maintenance, capable of enabling a worker to conveniently move between a steel tower and an electric wire without stepping on a polymer insulator when installing a polymer insulator device on an overhead transmission line or when the polymer insulator is already installed. The above-stated footrest ladder for polymer insulator maintenance comprises: a ladder body having a pair of main posts placed side by side with each other and sub posts combined between the main posts at intervals; a hook type supporter combined with the ladder body to be detachably assembled with a metal rod of a polymer insulator; and a detachable sub ladder detachably assembled with a free end part of the ladder body.

Description

Footrest ladder for polymer insulator maintenance

The present invention relates to a footrest ladder for maintenance of polymer insulators, and more particularly, when a polymer insulator is installed in an overhead transmission line, or when a polymer insulator is installed, an operator can conveniently move between a pylon and an electric wire without stepping on the polymer insulator. It relates to a footrest ladder for maintenance of polymer insulators.

In general, an insulator device is installed in a steel tower in order to support the electric wire and maintain electrical insulation in an overhead transmission line. Conventional insulators mainly connect several Porcelain insulators to secure the insulation distance between the wire and the pylon, but recently, the installation of polymer insulators with light weight and excellent economical efficiency is increasing.

The polymer insulator is a structure in which dozens of silicone rubbers in the shape of a lamp are attached to an insulating rod made of FRP material, and the surface can be easily damaged by continuous external force or sharp materials due to the characteristics of the material. Therefore, most power companies prohibit workers from walking on polymer insulators.

The insulator device becomes the moving path of the worker during the construction and maintenance of the transmission line. When installing an insulator device for the first time, first connect the wires to the pylon, and then raise the insulator device from the ground and fix it to the tower arm. In addition, a worker in the pylon stepping on the insulator goes down to the end of the insulator device and proceeds to connect the wire and the insulator device, and if necessary, step on the insulator and traverse between the pylon and the wire to perform various necessary tasks.

In addition, while the overhead transmission line is in operation, the worker steps on the insulator device on the steel tower, moves to the electric wire, and goes out to the span for work such as maintenance, accident recovery, and detailed inspection of the transmission line.

However, in this form of work, when a polymer insulator is installed, workability is very poor, and a problem occurs in worker safety.

In other words, unlike narcissus insulators with a hard surface, it is difficult to move or support the body by stepping on a rubber shade, so it is not easy for an operator to descend to the end of the polymer insulator device and come up for the work of connecting the polymer insulator device and the wire. In addition, if a worker steps on the polymer insulator and moves it, there is a greater risk of damage to the shade, which may cause a decrease in the insulation performance of the insulator. In particular, when the length of the polymer insulator is long, such as for an ultra-high voltage transmission line, there is a problem that it is more difficult to work.

Registered Utility Model No. 20-0176499

The technical problem to be solved by the present invention is for maintenance of a polymer insulator that allows an operator to conveniently move between a pylon and a wire without stepping on the polymer insulator when installing a polymer insulator device in an overhead transmission line or when a polymer insulator is already installed. It is to provide a footrest ladder.

In addition, the present invention is provided with a total of four supports, two at each end of the footrest ladder, and the end of the support is composed of a hook-shaped hook so that it can be easily overlaid on a metal rod of a polymer insulator, and the hook has It is an object of the present invention to provide a polymer insulator footrest ladder provided with a locking device so as not to escape after being strung over a metal rod of a polymer insulator.

In addition, in the present invention, when lowering the footrest ladder through the polymer insulator in order to install the footrest ladder, the supporter of the footrest ladder must be extended outward, so that the supporter hook naturally hangs on the metal rod of the polymer insulator, so that the supporter is always Another object is to provide a polymer insulator footrest ladder in which a coil spring is embedded in the fixed part connecting the footrest and the support so that it is open.

In addition, the present invention is a polymer insulator consisting of double pipes and square pipes in order to minimize the sagging phenomenon of the footrest ladder caused by the operator's load when the operator steps on the footrest ladder due to the long length of the footrest ladder. There is also a purpose to provide a footrest ladder.

The present invention for solving the above technical problem is a pair of main main materials arranged side by side with each other, a ladder body having an auxiliary main material that is coupled with an interval between the main main materials, and a metal rod of a polymer insulator coupled to the ladder main body. It is preferable to be configured to include a hook-type support that is detachably assembled with respect to, and a detachable auxiliary ladder that is detachably assembled with respect to the free end of the ladder body.

In the present invention, the main main material is composed of a double pipe structure protruding from both sides in the vertical direction with respect to the mounting blocks located at both ends of the auxiliary main material and extending along the longitudinal direction, and the double pipe structure is vertically formed around the mounting block. It is preferable to include at least one member of a double pipe member protruding from both sides of the direction and extending in the longitudinal direction, and a double angle pipe member having a flat portion integrally protruding from the outside of the double pipe member and extending in the longitudinal direction.

In the present invention, the hook-type support is bent in a hook shape and has a hook locking device hingedly coupled to the free end, and a hook locking device coupled to the hook-type support by having a locking groove for detachable assembly with the hook locking device. It is preferable to include a locking member that is coupled to the hook locking device in a screw-tight manner and suppresses separation of the hook locking device from the locking groove.

In the present invention, the hook-type support is installed to be pivotable toward the outer side of the main main material with respect to the ladder body through a structure for supporting rotation, and the structure for supporting rotation is extended from the main main material of the ladder main body. A hollow boss rotatably coupled to the coupling bracket, a support fixing bolt sequentially passing through the hollow boss and the connection bracket, and a connection bracket and a hollow boss fastened to the free end of the support fixing bolt It is preferable to have a tubular nut that bonds between them.

In the present invention, it is preferable that the rotation support structure further includes a coil spring having both ends fixed to the hollow boss and the tubular nut.

In the present invention, the main body of the ladder body is configured in a structure that can be divided into both sides through a main body connection part, and the main body connection part is a hinge structure of a vertical butt connection part connecting the upper part between the main body parts, and the It is preferable to be composed of a hinge structure of a horizontal butt joint connecting the lower part between the main main materials.

In the present invention, the detachable auxiliary ladder has a connecting portion having holes at both ends, one of the connecting portions is hinged to the main body of the ladder body, and the other of the connecting portions is a pylon through the installation of a rope. It is preferable to be configured to be connected with.

According to the footrest ladder for polymer insulator maintenance according to an embodiment of the present invention, when a polymer insulator device is to be installed in an overhead transmission line, or when a polymer insulator device is already installed, an operator crosses the polymer insulator device from the pylon and moves to the electric wire side. Since it can move without stepping on or supporting the body, it has the effect of protecting the polymer insulator and greatly improving the workability of the maintenance of the transmission line. In addition, by providing a walking path through which the worker can safely move, it is possible to secure worker safety.

In addition, since the footrest ladder according to the embodiment of the present invention is made of aluminum, the equipment is lightened and simplified, so that installation and disassembly are simple, and convenience of operation is provided.

1 is a perspective view showing the overall configuration of a footrest ladder for maintenance of a polymer insulator according to an embodiment of the present invention.
FIG. 2 is a partial enlarged view of the ladder body along with the cross section taken along the line AA of FIG. 1, and is a view for explaining the configuration of the main main material and the auxiliary main material.
3 is a perspective view showing an enlarged configuration of the hook-type support and the hook locking device shown in FIG. 1.
4 is an exploded perspective view showing the configuration of the structure for supporting rotation shown in FIG. 2.
5 is an exploded and enlarged perspective view showing the configuration of the main body connection part shown in FIG.
6 is a perspective view showing an exploded and enlarged configuration of the detachable auxiliary ladder shown in FIG. 1.
7 is a perspective view showing a state in which the footrest ladder is installed for a polymer insulator according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this process, the thickness of the lines or the size of components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of users or operators. Therefore, definitions of these terms should be made based on the contents throughout the present specification. In addition, the following examples are not intended to limit the scope of the present invention, but are merely exemplary matters of the elements presented in the claims of the present invention, and are included in the technical idea throughout the specification of the present invention and the constitution of the claims. Embodiments including elements that can be substituted as equivalents in elements may be included in the scope of the present invention.

Referring to FIG. 1, the footrest ladder for maintenance of a polymer insulator according to an embodiment of the present invention is a ladder body 10 arranged side by side along an installation path of a polymer insulator, and the ladder body 10 is coupled to the polymer insulator. It consists of a structure comprising a hook-type support 20 detachably assembled with respect to the insulator, and a detachable auxiliary ladder 30 detachably assembled with respect to the free end of the ladder body 10. In this case, the ladder body 10, the hook-type support 20, and the detachable auxiliary ladder 30 are preferably made of a lightweight material such as aluminum or aluminum alloy.

The ladder body 10 is coupled in a state spaced apart from each other with an appropriate distance between a pair of main members 11 and the main members 11 arranged side by side with each other, so that the operator can conveniently It is composed of a plurality of horizontally arranged auxiliary main materials (12) that can be stepped on and moved.

In addition, the main main material 11 is, as shown in Fig. 2 showing the cross-sectional area of the line AA of Fig. 1, from both sides of the mounting block 12a located at both ends of the auxiliary main material 12 in the vertical direction. It is composed of a double pipe member (11a) of a double pipe structure that is coupled to protrude toward the outside and extends along the longitudinal direction, or from both sides in the vertical direction around the mounting blocks (12a) located at both ends of the auxiliary main material (12). The double-angle pipe member 11b having a double pipe member 11a that is coupled to protrude toward and extends along the longitudinal direction, and a flat portion 11c that integrally protrudes and extends in a flat shape along the longitudinal direction from the outside of the double pipe member. It could be configured in a form.

That is, the main main material 11 is a structure in which only one member of a double pipe member and a double angle pipe member is selected from both ends of the auxiliary main material 12 and is respectively coupled, or a composite structure in which both members are individually coupled to both ends. It may be a cross-sectional structure.

However, the ladder body 10 having the structure as described above must be made of a material with adequate rigidity to prevent downward sagging caused by the load of the worker, but preferably, convenience of transportation and use. It would be desirable to be made of a lightweight, high-strength material such as aluminum alloy in order to increase the In addition, in the ladder body 10 of the structure as described above, the main main material 11 and the auxiliary main material 12 may have any form of cross-sectional structure as long as they can sufficiently withstand the load of the worker. .

The hook-type support 20 is an additional structure that is assembled at both ends of the ladder body 10 as shown in FIGS. 1 and 3, and serves to fix the ladder body 10 to the polymer insulator. It is composed. In this case, the hook-type support 20 is preferably composed of a total of four pieces assembled by two for each of the two ends of the main main material 11 of the ladder body 10, but the quantity is not limited and the main material Considering the length of (11), it may be determined as an appropriate quantity.

That is, the number of the hook-type supporters 20 installed in the ladder body 10 according to the length of the main member 11 can be variably adjusted. Incidentally, the hook-type support 20 fixes the main main material 11 of the ladder main body 10 with respect to the polymer insulator, thereby enabling the function of a temporary passage that allows the operator to move while stepping on the auxiliary main material 12. Therefore, it means that it can be provided in an appropriate quantity in consideration of an applied external load.

In addition, the hook-type support 20 is preferably installed individually for both ends of the main main material 11 disposed on both sides around the auxiliary main material 12, and the hook for the main main material 11 The position at which the mold support 20 is installed is of a different asymmetric configuration, so it would be more preferable to be configured in a structure that can be installed even when there is only one polymer insulator.

To this end, the hook-type support 20 is assembled with one end detachably attached to the metal rod of the polymer insulator, and the other end is rotatably coupled to the main member 11 of the ladder body 10. Would be desirable.

For example, one end of the hook-type support 20 is formed in the form of a member that is bent in a hook shape so as to surround the outer circumferential surface of the metal rod of the polymer insulator, and the hook locking device 21 is hinged as a structure that is rotatable with respect to the free end. ), and a hook locking clasp 22 that is coupled to the hook-type support 20 by having a concave locking groove 22a for detachable coupling with the hook locking device 21. In this case, the hook locking clasp 22 is made of a bracket-type fixing structure that is rigidly fixed to the hook-type support 20 through a coupling method such as welding, and is fastened with the hook locking device 21 It is configured to be provided in a possible position.

In addition, the hook-type support 20 is coupled to the hook locking device 21 in a screw-tight manner to prevent separation of the hook locking device 21 from the locking groove 22a of the hook locking clasp 22. It is configured to further include a fastening member 23 that performs the role of suppressing.

For example, the fastening member 23 is formed in the form of a nut that is fastened to a screw rod protruding outward from the free end of the hook locking device 21, or taps from the free end of the hook locking device 21 toward the inner circumferential surface. It may be made in the form of a bolt fastened to the nut portion to be processed. In this case, the fastening member 23 limits the separation of the hook locking device 21 from the hook locking clasp 22 or conversely, depending on the degree of screw fastening to the hook locking device 21. Become acceptable.

In addition, the other end of the hook-type support 20 is composed of a structure that is always elastically open toward the outside through the rotational support structure 24 with respect to the main member 11 of the ladder body 10 It is desirable. This is to ensure that the hook locking device 21 located at one end of the hook-type support 20 rotates elastically toward the outside so that it can be easily caught against the metal rod of the polymer insulator or be easily released when released. .

To this end, the rotation support structure 24 is a hollow type that is rotatably coupled to a connection bracket 11c extending from the main member 11 of the ladder body 10 as shown in FIG. 4. The boss 25, the support fixing bolt 26 that sequentially passes through the hollow boss 25 and the connection bracket 11c, and the connection bracket 11c is fastened to the free end of the support fixing bolt 26 ) And a tubular nut (27) for coupling between the hollow boss (25). That is, the hollow boss 25 is formed in a structure integrally coupled to the other end of the hook-shaped support 20.

In particular, the rotation support structure 24 is installed between the hollow boss 25 and the tubular nut 27 so that both ends are fixed thereto to rotate the hollow boss 25 with respect to the tubular nut 27 It is configured to further include a coil spring 28 for elastically supporting in the direction, the coil spring 28 is a hollow boss of the rotational support structure 24 based on the longitudinal direction of the main material 11 ( By providing a rotational restoring force that allows the 25) to always turn toward the outside, the hook locking device 21 located at one end of the hook-type support 20 is easily hooked and fixed to the metal rod of the polymer insulator, Or, it plays a role that can help to escape easily when canceled.

In addition, when the main member 11 of the ladder body 10 is long, it is difficult to transport, so to solve this problem and secure the convenience of transport, bolts that can be divided into both sides via the main body connection part 40 are fastened. It is made of an expression joint structure.

In this case, the main body connection portion 40 is a vertical connecting the upper portion at the free end of the double pipe member (11a) or the double angle pipe member (11b) constituting the main body 11 of the double pipe structure as shown in FIG. It is composed of a hinge structure of the type butt connection part 41, and a hinge structure of the horizontal butt connection part 42 that connects the lower part, thereby minimizing the downward deflection of the main member 11 from external loads by the operator. It would be desirable to have a structure that can prevent extreme damage such as breakage.

In addition, when the main body connection part 40 is at the free end of the double pipe member 11a or the double angle pipe member 11b, the positions of the vertical butt connection 41 and the horizontal butt connection 42 are opposite, respectively. It would be fine.

In particular, the hinge connection part of the main body connection part 40, that is, the vertical butt connection part 41 and the horizontal butt connection part 42 are coupled by bolts or fastening pins (not shown) assembled in a detachable structure and It would be more preferable to be configured with a structure that can be decomposed.

The detachable auxiliary ladder 30 is assembled detachably with respect to the free end of the ladder body 10 as shown in FIG. 6, and a hinge coupling method with the main member 11 of the ladder body 10 It is equipped with a connection part 31 of a through-type structure that can be detachably connected to each other at both ends, so that when the distance from the pylon to the ladder body 10 is somewhat longer, the detachable auxiliary ladder 30 is replaced with the ladder body 10 It is a structure that can be added to the free end of ).

In this case, the through-type structure of the connection part 31 provided at one end of the detachable auxiliary ladder 30 is a coupling structure (not shown) using a bolt or a fastening pin with respect to the free end of the main main material 11. The entire length of the ladder body 10 can be extended longer through a solid hinged connection made as a medium, and the through-type structure of the connection part 31 provided at the other end is fastened by inserting a connection means such as a rope. It can be used for a purpose that can be temporarily fixed for. That is, the connection part 31 provided at the free end of the detachable auxiliary ladder 30 is formed in the form of a connection bracket having a through-type hole 32.

Therefore, the footrest ladder according to the present invention configured as described above is installed through a hook-type support 20 for the polymer insulator as shown in FIG. 7 to serve as a temporary passage through which an operator can step on and move. .

That is, a bent part located at one end of the hook-type support 20 provided on the ladder body 10 is supported by hooking and supporting the metal rod 51 of the polymer insulator 50, and then the hook locking clasp 22 After assembling the hook locking device 21, by tightening the fastening member 23, it is possible to complete the rigid installation of the hook-type support 20 to the metal rod 51.

In this process, the hook-type support 20 can freely rotate about the main material 11 of the footrest ladder via the rotation support structure 24, so the installation of the polymer insulator 50 for the metal rod 51 The work can be made more convenient. In particular, when removing the main member 11 of the footrest ladder from the metal rod 51 of the polymer insulator 50, the coil installed between the hollow boss 25 and the tubular nut 27 of the rotation support structure 24 It is possible to perform a more simple disassembly operation by using the rotational direction restoring force by the spring 28.

In addition, since the footrest ladder according to the present invention can connect the detachable auxiliary ladder 30 to the ladder body 10 by using the body connection part 40, the entire length of the footrest ladder can be adjusted according to the situation of the work site. In addition to being able to extend for a longer time, by using a hole 32 formed in the connection part 31 of the detachable auxiliary ladder 30, a connection means such as a rope is fastened to the pylon, thereby stably fixing the footrest ladder to the pylon You can get the effect.

In addition, since the footrest ladder according to the present invention can divide the long main material 11 into both sides by using the main body connection part 40, it is possible to realize the convenience of transportation. In this case, the main body connection part 40 is formed of the hinge structure of the vertical butt connection part 41 and the hinge structure of the horizontal butt connection part 42 between the main member 11 of the double pipe structure, It is possible to minimize the downward sag of the main member 11 from the load, and through this, it is possible to more actively prevent extreme damage such as breakage.

10-ladder main body 11-main body
11a-double pipe member 11b-double angle pipe member
11c-connection bracket 12-sub main material
20-hook type support 21-hook lock
22-hook locking clasp 23-fastening member
24-Rotation support structure 25-Hollow boss
26-support fixing bolt 27-tubular nut
28-coil spring 30-removable auxiliary ladder
31-connection 32-hole
40-body connection 41-vertical butt connection
42-horizontal butt joint 50-polymer insulator
51-metal rod

Claims (10)

A ladder body having a pair of main main materials arranged side by side with each other, and an auxiliary main material coupled with an interval between the main main materials;
A hook-type support coupled to the ladder body and detachably assembled with respect to the metal rod of the polymer insulator; And
It includes a detachable auxiliary ladder that is detachably assembled with respect to the free end of the ladder body,
The hook-type support is bent in a hook shape and has a hook locking device hingedly coupled to the free end, a hook locking clasp that is coupled to the hook-type support by having a locking groove for detachable assembly with the hook locking device, and the A footrest ladder for maintenance of polymer insulators, characterized in that it has a fastening member coupled to the hook locking device in a screw-tightening manner to prevent separation of the hook locking device from the locking groove. The method according to claim 1,
The main main material is a polymer insulator maintenance footrest ladder, characterized in that consisting of a double pipe structure extending in the longitudinal direction by protruding from both sides in the vertical direction around the mounting blocks located at both ends of the auxiliary main material. The method according to claim 2,
The double pipe structure is at least one of a double pipe member protruding from both sides in the vertical direction around the mounting block and extending in the longitudinal direction, and a double angle pipe member having a flat portion integrally protruding from the outside of the double pipe member and extending in the longitudinal direction. A ladder for maintenance of a polymer insulator, characterized in that it comprises a member of. delete The method according to claim 1,
The hook-type support is a polymer insulator maintenance footrest ladder, characterized in that it is installed to be pivotable toward the outer side of the main material through a structure for supporting rotation with respect to the ladder body. The method of claim 5,
The rotational support structure is a hollow boss rotatably coupled to a connection bracket extending from the main body of the ladder body, a support fixing bolt sequentially passing through the hollow boss and the connection bracket, and the support A footrest ladder for maintenance of polymer insulators, characterized in that it has a tubular nut that is fastened to the free end of the fixing bolt and connects the connection bracket and the hollow boss. The method of claim 6,
The rotation support structure further comprises a coil spring fixed at both ends of the hollow boss and the tubular nut. The method according to claim 1,
The main main material of the ladder body is a polymer insulator maintenance footrest ladder, characterized in that it is configured in a structure that can be divided into both sides through the main body connection part. The method of claim 8,
The main body connection part comprises a hinge structure of a vertical butt connection part connecting the upper part between the main parts, and a hinge structure of a horizontal butt connection part connecting the lower part between the main part. Footrest ladder for insulator maintenance. The method according to claim 1,
The detachable auxiliary ladder has a connecting portion having holes at both ends, one of the connecting portions is hinge-coupled with the main main material of the ladder body, and the other of the connecting portions is configured to be connected to the pylon through the installation of a rope. The footrest ladder for maintenance of a polymer insulator, characterized in that.

Images