JP2686889B2 - Fictitious scaffolding for electrical work - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aerial scaffolding suitable for electric construction, substations, and switchyards (hereinafter referred to as "electrical station") suitable for various construction work.

[0002]

BACKGROUND OF THE INVENTION Substations are equipped with various equipment such as transformers, busbars, circuit breakers, disconnectors, lightning arresters, current transformers, phase shifters, power capacitors, shunt reactors, and overhead power transmission lines. It is installed, and in order to perform normal power transmission and distribution, it is necessary to regularly perform maintenance and inspection of these substation facilities and busbars. Such maintenance and inspections are carried out by personnel going near the intended facilities and busbars and using various equipment, instruments, and jigs. However, it is difficult for personnel to reach a predetermined place from the ground because the substation facilities are three-dimensionally arranged intricately on the premises and an extremely high voltage is transmitted. Is impossible to build.

As a countermeasure for this, it is conceivable to use a so-called aerial erection scaffold that seeks a reaction force to the steel frame structure of the substation and the transmission line towers in the vicinity thereof. It can be said that the flat plate structure is preferable because it walks and performs various operations and operations. However, in the scaffolding of a flat plate, the sufficient rigidity is given to the flat plate to increase the mass and the difficulty of transportation and erection work. In addition, it is easily shaken under the influence of wind, and a metal material having a small electric resistance value may cause a risk of electric shock and a risk of destroying substation equipment. Furthermore, since the dimensions are fixed, there is an inconvenience that scaffolding materials that meet the scaffolding construction conditions need to be prepared in advance. For this reason, it has been said that it is not possible to use an aerial scaffolding for maintenance and inspection at substations in the past.Therefore, the power supply to the substation is stopped for a certain period of time, and the equipment other than the maintenance target equipment is also considered as a power failure state. I had no choice but to carry out the work.

The present invention was devised from the above circumstances, and under the so-called live line condition in which there is a facility under high voltage load, the personnel can freely come and go to the target equipment and perform various works. It is to provide an aerial scaffolding for electrical work that can be performed safely, is lightweight, has good handleability, is less affected by wind pressure and rainwater, and can be adjusted to any size according to the equipment scale and work scale. .

[0005]

In order to achieve the above-mentioned object, the aerial scaffold for electrical work of the present invention is a scaffold mainly installed in a substation for working under hot line conditions. A main net composed of at least two parallel main ropes consisting of a waterproof type fiber rope with a resin covering the outer circumference of the fiber and a waterproof cap at the end, and a high performance synthetic fiber outer circumference stretched over the main net. And a subnet having a size of eyes capable of inhibiting passage of a human body, which is made of a waterproof net thread which is entirely covered with resin and has a terminal with a waterproof cap. The main net includes a reinforced rope extending in a direction intersecting with the main rope or a fiber reinforced synthetic resin pipe.
And it is preferable that a side eye is provided at the end of each muscle rope of the main net.

[0006]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows an embodiment in which an aerial scaffold for electrical work according to the present invention is applied to a substation, and 2 is a substation facility,
It consists of a transformer, a bus, a circuit breaker, a disconnector, a lightning arrester, a current transformer, a phase adjuster, a power capacitor, and a shunt reactor.
Reference numeral 3 is a steel-framed gate-shaped support body that is connected from the outside of the substation equipment 2 to the rising tops, and 4 is a steel tower outside the substation, and a transmission line 5 passing through this is a substation-shaped support body 3 Guided to facility 2. Reference numeral 1 denotes an aerial scaffold according to the present invention, which has a hammock shape formed by using ropes and nets, and is stretched with a predetermined tension on a gate-shaped support 3 having both ends.

FIG. 2 shows an embodiment of the aerial scaffolding 1 of the present invention, which comprises a main net 1a and a subnet 1b. The subnet 1b supports the weight of personnel and ensures stable free walking, and the size of the mesh is preferably 70 mm square or less so as to prevent passage of a human body. The main net 1a is a strength member that supports the subnet 1b, and is composed of at least two (three in this embodiment) main ropes 10a extending in parallel to the longitudinal direction. The main ropes 10a are networks that form the subnet 1b. It has a diameter that is at least about three times the diameter of the thread strand 10c. In this embodiment, the main net 1a has a plurality of streak ropes 10b extending in a direction intersecting with the main rope 10a, which is also at least about the diameter of the wire strands 10c of the net yarn constituting the subnet 1b. It has three times the diameter. However, the muscle rope 10b may not be used.

The main rope 10a, the muscle rope 10b, and the subnet 1b are made of a fiber material having a large electric insulation resistance value so that the main rope 10a, the muscle rope 10b, and the subnet 1b are safe even in a so-called live line state in which a voltage is applied to the substation equipment 2 and the transmission line 5. It is configured. In addition, it is preferable that the fiber material has the characteristics of being lightweight, having high strength, and having small elastic elongation when tension is applied (high elastic coefficient). The reason is that a relatively small amount of high-strength fiber is used to reduce the weight, and the weight reduction has the effect of reducing the sag of the erected scaffold. Furthermore, by using a fiber material with a large elastic modulus, it is possible to reduce the elongation of the rope under tension or the elongation of the net yarn, and it is possible to restrict the sag to a minimum, as described above, and This is because the activity of a certain person can be facilitated. Examples of those having such characteristics include so-called high-performance synthetic fibers such as aramid fiber, ultrahigh molecular weight polyethylene, and aromatic polyester. Further, even if some Joule heat is generated due to the transmission of a high voltage current, it is preferable that the degree of thermal deterioration is relatively small. Therefore, the most suitable high performance synthetic fibers are aramid fibers and aromatic fibers.

FIG. 3 is an enlarged view of an example of the main rope 10a and the reinforced rope 10b. The inner layer body 100 is formed by striking 8 or 16 strands of a yarn obtained by twisting raw material yarns of high performance fiber. The braided outer layer body 1
It consists of a tightly surrounded 01. However, this is still insufficient. This is because the fiber material itself may absorb water, or may absorb water due to a capillary phenomenon between the fibers, which may lower the electrical insulation resistance value. Therefore, a resin coating 102 of urethane, polyethylene, polypropylene, nylon or the like is applied to the outer layer of the outer layer body 101 to form a completely waterproof rope. Further, the cut end portion 1 of the main rope 10a or the muscle rope 10b.
05 and the cut end portion 105 of the net yarn 10c constituting the main net 1b, a waterproof cap 12 made of resin or the like is attached to cover the cut end portion 105 as shown in FIG. It is designed to prevent intrusion and maintain electrical insulation.

The main rope 10a constituting the main net 1a is provided at both ends with eyes 11 for connecting the supports 3 and 3 directly or via other ropes to give a predetermined tension force. There is. The muscle rope 10b is the main rope 10
For example, the lengths of a are arranged at intervals of 1/10 or less, and each muscle rope 10b has a length exceeding the intersection of the main ropes 10a, and the side eyes 1 are provided at both ends.
1'and 11 'are provided. Side eye 11 ', 1
1'is a connecting portion to the support instead of the eyes 11 at both ends of the main rope 10a, and an attaching portion of the auxiliary stabilizing rope.
Furthermore, several fictitious scaffolds for forming a wide scaffold 1
Function as a connecting means of the. The main rope eye 11 and the side eyes 11 ', 11' may be ice-price by piercing with a pin, but in this embodiment, an insulating sleeve in which the outer surface of a metal having a small specific gravity such as aluminum is coated with a non-conductive material as shown in FIG. Main rope eye 11 and side eye 1 by lock processing that 110 is fitted on the folded back part and crimped
I got 1'and 11 '. The crossing portion between the muscular rope 10b and the main rope 10a is firmly joined by a binding portion 112 made of high performance fiber or the like.

The peripheral portion of the subnet 1b is the main net 1
It is firmly fixed to the main rope 10a of a and the muscle ropes 10b on both sides, and the intermediate portion is supported by being stretched on the intermediate main rope 10a and the muscle rope 10b. In this embodiment, as shown in FIG. 4, the main rope 10a is passed through the mesh of the peripheral portion of the subnet 1b, and the binding portion 11 made of high performance fiber or the like is used.
Although not shown, the end of the binding portion is waterproofed by a resin coating. Of course, the subnet 1b may be divided for each mesh formed of the main rope 10a and the streak rope 10b, or may be divided for each mesh. In other drawings, 13,1
Reference numeral 3'denotes a stabilizing auxiliary rope which is used as necessary and is made of the same fiber material as the main rope 10a and the muscle rope 10b.

It is to be noted that the stabilizing auxiliary cord 1 is used especially in a narrow space.
For scaffolding where 3,13 'cannot be installed,
As shown in FIGS. 9 and 10, instead of the muscular rope 10b, an inorganic fiber reinforced synthetic resin pipe 1 having an outer diameter of, for example, about 20 mm.
It is convenient to use 0d. That is, the inorganic fiber reinforced synthetic resin pipe 10d is connected to the main ropes 10a, 10a.
It is attached in the shape of a lattice bar between the two, and the intersection with the main rope 10a is firmly connected by a binding portion 112 made of high-performance fiber or the like. In this case, if a small hole 103 for binding is provided at the end of the inorganic fiber reinforced synthetic resin pipe 10d, it is convenient to connect with the main rope 10a. When such a configuration is adopted, if the main rope eyes 11 and 11 are firmly connected to the one side portion 30 and the other side portion 31 of the support body 3, the inorganic fiber reinforced synthetic resin pipe 10d allows the main rope eyes 11 and 11 to move in a direction perpendicular to the main rope 10a. The swing can be reduced and the sag due to the weight of the staff can be restricted to a minimum, so that the activity of the staff on the stable scaffold can be maintained.

[0013]

Since the present invention has the above-described structure, maintenance of the substation equipment 2 at an electric station, for example, a substation,
When performing an inspection or the like, the main rope 10a is firmly connected to the one side portion 30 of the support body 3 through the eyes 11, 11 at one end in the longitudinal direction and the side eye 11 'of the end streak rope 10b. Then, a lead rope (not shown) is passed from the other side portion 31 of the support body 3 to the one side portion 30, the eyes 11, 11 at the other longitudinal ends of the main rope 10a are connected to the lead rope, and the lead rope is pulled. As a result, the aerial scaffold 1 of the present invention is deployed, and tension is applied through the eyes 11, 11 and the side eye 11 'when the other longitudinal end of the main rope 10a reaches the other side portion 31 of the support body 3, Other side 3 in the state
Connect to 1. This constitutes a hammock-shaped aerial scaffold as shown in FIGS.

In this aerial scaffold, a stable tension state is maintained by a main net 1a composed of a plurality of parallel main ropes 10a and a striated rope 10b intersecting with the main ropes 10a, and good scaffold strength as a beam material is obtained. Thus, the subnet 1b combined with the main net 1a can be stably supported. And its subnet 1b
Has a relatively small mesh that impedes passage of the human body. For this reason, maintenance and inspection personnel can walk safely and equipment can be moved safely. Moreover, the main net 1a
Since both the subnet 1b and the subnet 1b are made of high-performance fibers such as aramid fibers and aromatic fibers, they are lightweight and strong, and have high elasticity, so that the sag is small and the elongation under tension is small. Therefore, it is possible to actively perform activities such as walking in combination with being less affected by wind pressure. Moreover, the main net 1a and the subnet 1b have good electrical insulation. In addition, since the main net 1a and the subnet 1b are provided with the waterproof resin coating 102 on the outer circumference, the fibers do not absorb water or retain water. Further, a waterproof cap 12 is attached to the rope cutting end and the net yarn cutting end to prevent rainwater and the like from entering the fibers. For this reason, the electrical insulation is very good not only under dry conditions but also in rainy weather and the work can be performed safely. Since the degree of thermal deterioration is small, the scaffolding function can be maintained even in the event of contact with a high voltage even in the summer.

By the way, a preferable element as an aerial erection scaffold is stability against shaking, and by maintaining the stability, work safety of personnel can be ensured and work efficiency can be improved. This stability can be ensured by the main net 1a, but if it is necessary to obtain further stability, the auxiliary stabilizing cords 13 and 13 'are attached,
It is preferable to guide this to the support 3 to apply tension. In the present invention, each muscle rope 10b of the main net 1a has side eyes 11'11 'at both ends. Therefore, the stability auxiliary cords 13 and 13 ′ can be easily attached, and the stability auxiliary cords 13 and 13 ′ can be easily attached.
The mounting position of can be freely selected. FIG. 6 shows a state in which the stabilizing auxiliary cords 13 and 13 'are equipped to stabilize the scaffold. The stability auxiliary cords 13 and 13 'are
Generally, the tension is raised above the scaffolding level in an arbitrary direction. However, as shown in FIG. 7, it is also provided below the scaffolding level so that the stabilizing auxiliary cords 13, 1 provided above the scaffolding level are provided.
An initial tension can be applied to 3 ', which can further increase the stability. Of course, stability auxiliary rope 1
3, 13 'can also be stretched horizontally.

Further, since each of the ropes 10b has side eyes 11'11 'at both ends, the side eyes 11'1 corresponding to the side eyes 11'11' when the span is short.
By selecting 1'and connecting it to the support, the lengthwise direction of the net can be substantially changed. The surplus net part is folded and overlapped on the net surface to be used, and the side eyes 11'11 'are connected to each other. It can be used as it is by doing. Also, when a wide scaffold width is required depending on the place of use, it is possible to freely deal by connecting the two aerial scaffolds 1 and 1 in parallel and connecting the side eyes 11′11 ′ to each other by an appropriate means as shown in FIG. can do. On the other hand, if a scaffold with a narrow width is required, the one in the state shown in FIG. 2 should be folded in two and overlapped, and the side eyes 11′11 ′ should be connected to each other by an appropriate means. You can Even when the work such as maintenance and inspection is completed and the scaffold is no longer needed, it is lightweight and easy to handle and transport. INDUSTRIAL APPLICABILITY The present invention can be used not only as an aerial scaffold at a substation, but also as a scaffold for constructing an aerial power transmission line by being stretched between steel towers.

[0017]

According to the first aspect of the present invention described above, in a scaffold mainly installed in a substation for working under hot line conditions, the scaffold covers the entire surface of the high performance synthetic fiber with a resin. Also, a main net 1a composed of at least two parallel main ropes 10a made of a waterproof type fiber rope having a waterproof cap 12 at the terminal and a main net 1a stretched over the entire surface of the high performance synthetic fiber with resin. Since the subnet 1b is made of a waterproof net thread that is covered and has a waterproof cap 12 on the terminal and the size of the eyes is a size that can prevent passage of the human body, the following excellent effects can be obtained. To be A stable tension state is maintained by the main net 1a composed of a plurality of parallel main ropes 10a, and good scaffold strength as a beam material is obtained.
The subnet 1b combined with a can be stably supported. The subnet 1b has a relatively small mesh that hinders passage of the human body. For this reason, maintenance and inspection personnel can walk safely and equipment can be moved safely. Since both the main net 1a and the subnet 1b are made of high-performance fiber, they are lightweight and strong, and have high elasticity, so that the sag is small and the elongation under tension is small. Therefore, in combination with being less affected by wind pressure, activities such as walking can be actively carried out, and since it is relatively flexible, it is easy to handle. Not only the main net 1a and the subnet 1b have good electrical insulation, but also the main net 1a and the subnet 1b are covered with the waterproof resin coating 102 on the entire outer periphery thereof, so that water absorption and water retention of the fiber occur. In addition, since the waterproof cap 12 is attached to the rope end and the net yarn end, rainwater and the like can be prevented from entering the fibers. For this reason,
The electrical insulation is very good not only under dry conditions, but also in rainy weather and the work can be performed safely. Since the degree of thermal deterioration is small, the scaffolding function can be maintained even in the event of contact with a high voltage even in the summer.

According to claim 2, the main net 1a is
A high-performance synthetic fiber, which is entirely covered with a resin and has a waterproof cap 12 at its end, is made of a waterproof fiber rope and has a reinforced rope 10b extending in a direction intersecting with the main rope or a fiber-reinforced synthetic resin pipe 10d. Therefore, in addition to the effect of claim 1, an excellent effect that a more stable scaffold can be formed can be obtained. Claim 3
According to the side eye 11'1 at the end of the muscle rope 10b.
Since 1'is provided, it is possible to freely adjust the scaffold size according to the equipment scale and work scale, and easily connect the stabilizing auxiliary ropes 13 and 13 'by freely positioning them. This has the excellent effect of increasing the stability against shaking.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a usage state of an imaginary scaffold for electrical work according to the present invention.

FIG. 2 is a plan view showing an embodiment of an aerial scaffold for electrical work according to the present invention.

FIG. 3 is an enlarged view illustrating the structures of ropes and net yarns that form a net in the scaffold of the present invention.

FIG. 4 is a partially enlarged view of FIG. 2;

FIG. 5 is a partially cutaway side view showing cut ends of ropes and net yarns constituting a net in the scaffold of the present invention.

FIG. 6 is a side view showing another usage state of the scaffold of the present invention.

FIG. 7 is a side view showing another usage state of the scaffold of the present invention.

FIG. 8 is a plan view showing a method of using the scaffold of the present invention.

FIG. 9 is a plan view showing another embodiment of the aerial scaffolding for electrical work according to the present invention.

10 is a partially enlarged view of FIG. 9. FIG.

[Explanation of symbols]

 1 Aerial scaffolding 1a Main net 1b Subnet 10a Main rope 10b Muscle rope 10d Fiber reinforced synthetic resin pipe 11 Main rope eye 11 'Side eye 12 Waterproof cap 13 Stabilization auxiliary rope 102 Waterproof resin coating

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoichi Suto 23 Shimokyukai, Toyooka-cho, Gamagori-shi, Aichi (56) References JP-A-51-20443 (JP, A) JP-A-1-322064 (JP, A) Actual Kaihei 1-46333 (JP, U)

Claims (3)

(57) [Claims] 1. In a scaffold mainly installed in a substation for working under live-line conditions, the scaffold covers the entire surface of a high performance synthetic fiber with a resin and a terminal has a waterproof cap 12.
A main net 1a composed of at least two parallel main ropes 10a made of a waterproof fiber rope having
The mesh is made of a waterproof mesh thread that is stretched around the main net 1a, entirely covers the high-performance synthetic fiber with the resin 102, and has a waterproof cap 12 at the end, and the size of the eyes is large enough to prevent passage of the human body. An aerial scaffold for electrical work, characterized by being configured from subnet 1b. 2. A main net 1a has a high-performance synthetic fiber whose outer periphery is entirely covered with a resin 102, and a terminal has a waterproof cap 12
A reinforced rope 10b comprising a waterproof type fiber rope having a ridge and extending in a direction intersecting with the main rope or having a fiber reinforced synthetic resin pipe 10d.
Fictitious scaffolding for electrical work described in. 3. A side eye 11 'at the end of the rope 10b.
The aerial scaffolding for electric work according to claim 2, including a structure in which 11 'is provided, and the auxiliary auxiliary ropes 13 and 13' are attached thereto.