JPH0553548B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a coating device for power transmission tower arms.

``Conventional technology'' Transmission towers prevent rust and maintain a specified strength.
Painted to withstand longer use.

For painting work, first, before painting, remove rust from the surface to be painted.
There is a cleaning process that involves physically and mechanically removing dirt, oil, and other foreign substances to improve the adhesion of paint. Next, in order to temporarily suppress the occurrence of rust, an undercoat containing a rust-preventing pigment is applied. This series of processes, in which an intermediate coat is applied when a particularly thick film is required, and then a top coat is applied to create a rust-preventing coating on the steel surface that is aesthetically pleasing, water resistant, and weather resistant, is a common process for steel towers. This is a rust-proof painting work.

Most of the work is inefficient and manual. The background to this is that steel towers are structures made of L-shaped steel or iron pipes, so they are not flat, and there are restrictions on construction methods because they must be worked at heights, and there are always electrical hazards. . Developing efficient construction methods that overcome these adverse conditions is an essential issue.

A power transmission tower has an arm projecting in the left-right direction at a predetermined interval in the vertical direction of the tower body, and a power transmission line is suspended from the tip of the arm with an insulator interposed therebetween.

On the other hand, when it comes to so-called live lines that are transmitting power to power lines, the standard distance is the area in which you must not work close to the live lines: 33KV within a radius of 0.75m, 77KV within a 1m radius, 154KV within a 1.6m radius. has been done.

Painting work is considered safe as long as standard distances are maintained and safety distances are maintained.

``Problem to be solved by the invention'' When painting the power transmission line tower arms that suspend power lines, it is usually dangerous, so a small amount is Generally, they are applied with a paint brush, but in the event of a power outage, an alternative power transmission route is required and may cause inconvenience to customers.

``Means for Solving the Problems'' Therefore, in view of the above circumstances, the present invention has been devised to efficiently and continuously paint transmission tower arms in a safe state while transmitting power, that is, to maintain a safety distance without entering the standard distance. In order to achieve the desired results, we installed an application section at the tip of an insulating coating stick that is longer than the distance at which work should not be done close to the power lines, and installed an application section on the tower body or above the application section. A supply pipe connects the paint tank suspended by an electrically insulated chain on the upper arm, and an electromagnetic shut-off valve is installed in the supply pipe to allow or shut off the flow of paint, and a flange is attached to the insulated end near the base end of the insulated painted rod. The coating equipment is installed protrudingly and is connected to one end of the ground wire of the collar, and the tip of an insulated work rod that is longer than the distance from which work should be done close to power lines is driven by an engine compressor. Attach a cleaning tool with an air motor interposed, connect the EMMA motor and the engine compressor temporarily installed on the tower with an insulated air hose, install a collar protruding from the insulation end near the base end of the insulated work rod, and connect a grounding wire to the collar. The present invention provides a coating device for a power transmission tower arm, which comprises a keren device connected to one end of the arm.

``Operation'' The operator grasps the base end of the insulating coating rod, opens the on-off valve, supplies paint from the paint tank to the application section, and coats the surface of the arm to be coated with the paint supplied from the application section. The air motor of the insulated work rod is driven by an engine compressor temporarily installed on the tower to operate the cleaning tool and perform cleaning work.

"Example" Figure 1 shows painting work on a power transmission tower 1, and Figure 2 shows cleaning work.

The power transmission tower 1 has an arm 3 projecting in the left and right direction at a predetermined interval in the vertical direction of the tower body 2, and a power transmission line 5 is suspended from the tip of the arm 3 via an insulator 4. The tower body 2 is constructed by connecting four upright main legs 6 with horizontal columns 7 and diagonal members 8, and the arm 3 has an arm main member 9 that extends horizontally laterally with the main legs 6 as the base end, and a base. It consists of an arm hanging member 10 whose end is fixed to the main leg 6 and extends diagonally downward, and the tip of the arm main member 9 and the tip of the arm hanging member 10 are fixed at one place,
A power transmission line 5 is suspended there through an insulator 4. It is dangerous for workers to enter the power transmission line 5 within the standard distance while power is being transmitted. Workers must perform painting and cleaning work outside the standard distance. If the distance is outside the standard distance, the safety distance can be maintained and it is considered safe.

The coating device A is constructed as follows.

The insulating coating rod 16 has insulating properties and is lightweight.
Made of FRP or the like, the length of the insulating coated rod 16 is set so that there is no electrical danger even if the worker grasps the base end, that is, so that the worker does not come within the standard distance of live wires. As shown in FIG. 3, a brush or spongy applicator 17 is provided at the tip, and an opening at the tip of a supply pipe 18 made of vinyl chloride or the like, through which the tip of an insulating coating rod 16 is inserted in the axial direction. 19
The paint can be supplied so that the paint can be impregnated into the coating part 17 where the paint is located. The insulating coating rod 16 from the point where the supply pipe 18 extends from the insulating coating rod 16 to the base end is formed solid, and has a predetermined length from the point where the supply tube 18 extends from the insulating coating rod 16, e.g.
For 77KV, use an insulating section of 1300 mm or more to ensure dielectric strength, protrude a flange 20 at the end of the insulation near the proximal end to prevent danger, connect one end of the grounding wire 21 to the flange 20, and connect the other end of the grounding wire 21 to the flange 20. A grounding fixture 22 capable of gripping the arm main member 9 is connected to the ground fixture 22. Insulating coating rod 16
The portion from the collar 20 to the base end is the gripping portion. A supply pipe 18 inserted through the tip of the insulating coating rod 16 is provided with an on-off valve 23 such as an electromagnetic valve for controlling the flow rate or passing through or blocking the paint. The on-off valve 23 can be operated using the grip of the insulating coated rod 16.

As shown in FIG. 1, a paint tank 27 is connected to the tower body 2 and the arm main member 9 of the arm 3, which is one step above the arm 3 where paint is applied with an insulating coating stick 16, by an insulating chain 26 made of electrically insulated material such as acetal resin. 3, and the supply pipe 18 of the insulating coating rod 16 is connected to the bottom of the paint tank 27.

On the other hand, the insulated work rod 16 is grounded by fixing the grounding fixture 22 connected to the other end of the grounding wire 21 to the arm main member 9 or the arm hanging member 10. In the unlikely event that the insulated work rod 16 is energized from a live wire, the current can be grounded.

In the painting operation, the on-off valve 23 is opened, and the paint naturally flows by gravity from the paint tank 27 through the supply pipe 18 and reaches the coating section 17, where it is applied to the surface to be painted by the operator.

On the other hand, the cleaning device B is a portable type in which a small air motor 32 is interposed at the tip of an insulated work rod 31 and a cleaning tool 33 such as a bowl-shaped wire brush or wire wheel is attached to the tip, and the air motor 32 and the cleaning tool 33 are attached to the horizontal member 7 of the tower body 2. Small engine compressor 3
4 is communicated with an electrically insulated air hose 35 made of vinyl chloride with Tetron blades or the like. The insulated work rod 31 is similar to the insulated coating rod 16 of the coating apparatus A, and is further provided with a grounding wire 21 and a grounding fixture 22 in the same manner.

For the cleaning work, a cleaning tool 33 such as a wire brush is attached to the air motor 32 at the tip of the insulated work rod 31.
is installed, compressed air is sent from the hypothetical engine compressor 34 onto the tower body 2 through the insulated air hose 35, and the cleaning tool 33 is rotated to mechanically remove the required areas to prepare the surface before painting. The air motor 32 can be operated using the grip portion of the insulated work rod 31.

"Effects of the Invention" As described above, the present invention provides an application section at the tip of an insulating coating stick that is longer than the distance at which work should not be done close to the power transmission line, and the application section is placed above the application section. A supply pipe connects the paint tank suspended by an electrically insulated insulating chain on the tower body or upper arm, and an electromagnetic shut-off valve is installed in the supply pipe to allow or shut off the flow of paint. A coating device with a collar protruding from the end and one end of the ground wire connected to the collar, a cleaning tool attached to the tip of an insulated work rod with an air motor interposed, and an air motor and an engine compressor temporarily installed on the tower. This is a coating device for power transmission tower arms, which consists of a keren device connected with an insulated air hose, and is capable of continuously and efficiently painting power transmission tower arms in a safe state while transmitting power, i.e., while maintaining a safe distance without entering the standard distance. can be achieved. Conventionally, a power outage was required to perform painting work, but according to the present invention, painting can be done at any time using an insulated painting rod without power outage, making it possible to efficiently paint power transmission tower arms. Additionally, power outages will no longer cause inconvenience to customers.

[Brief explanation of drawings]

Fig. 1 is a front view showing the coating work state of a specific embodiment of the present invention, Fig. 2 is a front view showing the cleaning work state, Fig. 3 is a front view of the coating equipment, and Fig. 4 is a front view of the washing equipment. It is a front view. 16... Insulating coating rod, A... Painting device, 17...
...Applying section, 31...Insulated work rod, 27...Paint tank, 32...Air motor, 18...Supply pipe, 3
3...Cleaning tool, 23...Opening/closing valve, B...Cleaning device.

Claims (1)

[Claims] 1. A coating section is installed at the tip of an insulating coating rod that is longer than the distance at which work should not be done close to the power transmission line, and an insulating chain is electrically insulated between the coating section and the tower body or upper arm above the coating section. A supply pipe connects the suspended paint tank, and the supply pipe is equipped with an electromagnetic on-off valve that allows the paint to flow or shut off. A collar is protruded from the insulation end near the base end of the insulated painted rod, and a grounding wire is connected to the collar. The coating equipment is connected at one end, and an air motor driven by an engine compressor is interposed at the tip of an insulated work stick that is longer than the distance that should not be used when working close to power lines. Installation, connecting the EMMA motor and the engine compressor temporarily installed on the tower with an insulated air hose, protruding a flange on the insulated end near the base end of the insulated work rod, and connecting one end of the grounding wire to the flange. Painting equipment for power transmission tower arms.