JPS5846925B2 - cross gold wheel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a metal cross used for replacing existing overhead lines, ie ground wires, and power lines installed between steel towers, ie, removing old lines, and constructing new lines.

Existing overhead lines installed between steel towers may be replaced with lines of the same or different type after the end of their useful life or to resolve insufficient current capacity due to increased power transmission capacity.

In constructing this work, we will avoid the complexity of building protective scaffolding to protect roads, structures, and other obstacles between the steel towers, the increase in work period due to enlargement, and the increase in construction costs. Therefore, without building protective scaffolding,
The method used is to replace overhead wires in the air.

Among the aerial overhead wire re-stretching methods, the method in which workers ride in the air on existing overhead wires and suspend metal wheels from the existing overhead wires is highly dangerous, so we have decided to eliminate the need for workers to ride in the air and improve the work. Construction methods to ensure safety have been developed and are known.

First, if the line to be replaced (hereinafter referred to as the old line) is located above the line that cannot be replaced, it is necessary to have upper and lower metal wheels integrally connected to these lines with an interval between the upper and lower sides. Set up a number of hanging metal cars, connect the hanging cars with each other with a rope, connect this connecting rope to a self-propelled machine suspended from one of the lines, and run this self-propelled machine. Hanging metal cars are suspended between steel towers at regular intervals, and then the line to be replaced (hereinafter referred to as the new line) is connected to the end of the old line, and this old line is loosened to adjust the top and bottom of the hanging metal cars. is reversed, the upper old line is supported by the metal wheel suspended from the lower line via this hanging wheel, and then the old line is pulled out and the new line is passed between the steel towers, There is a construction method in which the new line that has been replaced is tensioned, the hanging wheel is reversed again, the new line is suspended and supported, and the hanging wheel is then recovered.

Second, if the old line is located below a line that cannot be replaced, set up a hanging set of the required number of hanging metal wheels that have upper and lower metal wheels that are integrally connected to these lines with an interval above and below. Then, these hanging wheels are connected to each other with a rope, and this connecting rope is connected to a self-propelled machine suspended from one of the above lines, and this self-propelled machine is run to move the hanging wheels between the towers at regular intervals. The new line is then connected to the end of the old line, and unlike the conventional construction method in 1, the position of the upper and lower wheels is maintained without reversing the top and bottom of the hanging wheel due to the loosening of the old line. There is a construction method in which the old line is taken over, the new line is crossed over, and then the hanging metal cars are recovered.

If the old line is a ground wire, conventional method 1 has the disadvantage that it is essential to stop the power line below, which causes great damage to the system operation, and conventional method 2 cannot be applied.

A common drawback of conventional construction methods 1 and 2 is that it is essential to use two upper and lower metal wheels, which increases the weight of the tools and limits the number of hanging metal wheels that can be installed to ensure the strength of the steel tower.

Furthermore, as the number of hanging wheels installed is limited, the spacing between the hanging wheels becomes larger, and as a result, the old line sags more when it is relaxed, and it approaches the live line side due to sideways vibration caused by the wind. There is a risk of an accident occurring.

The metal wheels used in these conventional construction methods have the following structure.

In other words, a wire insertion opening is formed by mounting a pair of upper and lower pulleys at wire insertion intervals in a rectangular metal wheel frame, and upper and lower metal fittings are formed by protruding connection pieces having holes at the center of both the upper and lower surfaces of the metal wheel frame. A wire inlet/outlet is formed in the wheel connection part and the metal wheel frame on the 1st side of the wire insertion port, and the opening/closing plate is pivotally attached to it, and it can be attached and removed by opening and closing the manual opening/closing device attached between this tip and the metal wheel frame. It is composed of a wire entry/exit part that allows the wire to be freely attached to the metal wheel, and a colinear metal wheel connection part formed by a presser plate attached to the connecting piece and a tightening bolt.

This metal wheel has the disadvantage that when the metal wheel is tilted, the wire separates from the pulley surface and slides against the metal wheel frame.

In other words, when a new line is connected and the old line is pulled out at one end of the tower, these lines normally slide on the upper surface of the lower pulley of the lower metal wheel of the upper and lower metal wheels, but the wire arrangement (offset) ) or wind may cause the metal wheel to tilt laterally at right angles to the direction of line extension, in which case the line separates from the upper surface of the lower pulley.

Due to this separation, the wire moves to the metal wheel frame of the wire insertion opening without a pulley, which causes friction damage to the wire and fluctuates the dose attraction force.

When one of the hanging metal wheels installed between the steel towers separates from the upper surface of the lower pulley as described above, a large force is applied to pull the following metal wheel, and there is also a gap between the metal wheel and the front metal wheel. The sagging of the connecting rope also increases.

Therefore, there is a risk that the line and rope will approach the live line side of two parallel lines or two perpendicular lines, causing an accident.

In order to avoid this, it is necessary to constantly monitor the condition of the gold wheel and adjust the dose attraction, making it difficult to extract the wire.

This invention was made in order to eliminate the drawbacks of the conventional construction method and the metal wheel used therein. A pulley is attached to each feeding direction of a cross-shaped metal wheel frame, and a circular pulley is installed in the center of the pulley. By forming a wire insertion hole and attaching the metal wheel connecting rope attachment parts to the left and right sides of the metal wheel frame, the wire always slides on the pulley surface regardless of the inclination of the metal wheel. Prevents friction damage and variation of dose attraction, ease of work,
We aimed to improve safety.

In addition, we have eliminated the need for gold wheels to be suspended from lines other than the old lines.
New overhead wire tension: The purpose is to provide a cross gold wheel that makes it possible to adopt the replacement blade method.

Hereinafter, the present invention will be explained with reference to embodiments shown in the drawings.

The metal wheel frame 1 has a U-shaped cross section with a left side 11, an upper side 12, and a right side 1.
3. It is formed into a cross shape with the lower side 14.

The left side 11, the upper side 12, and the right side 13 are integrally formed, and the l end of the lower side 14 is attached to the lower end of the left side 11 with the root pin 4a.
The other end is fixed oppositely to the upper side 12 by an opening/closing device 4 attached to the lower surface of the right side 13.

A light alloy is used for the metal wheel frame 1 in order to reduce the weight of the metal wheel.

The ribs 15 are for reinforcing the strength of the metal wheel frame 1.

Pulleys 21, 22, 23, 24 are installed in each feeding direction,
One circular wire insertion opening 3 is formed in the center of the metal wheel frame 1.

The upper pulley 21 rolls on the new line or the old line, and the lower pulley 2
2 is for guiding and supporting the new line or old line in a relaxed state.

In addition, the left and right pulleys 23 and 24 are used to keep the wire in contact with the pulley surface even if the metal wheel is tilted, and prevent friction damage to the wire and fluctuations in the dose attraction due to the wire separating from the pulley surface. .

Each of the pulleys 21, 22, 23, and 24 is made of a lightweight, highly hard, and low-friction synthetic resin material.

The opening/closing device 4 includes a pair of locking pieces 41 and 42 protruding from the lower surface of the right side 13 and a locking rod 43.

The locking rod 43 is slidably inserted through the guide tube 41a of the locking piece 41, and is connected to the intermediate sliding locking portion 43a and the small diameter node hole 4.
1b, a coil sprifg 44 is wound around it to form a compression stud, and the large-diameter heir 43b at the rear end is inserted into the small-diameter node hole 4.
1b, and the distal end portion 43C is inserted and locked into the guide tube 42a of the locking piece 42.

Reference numeral 45 denotes a protruding end of the mounting shaft of the lower pulley 22, which has a locking hole 45a facing the locking rod 43, is inserted between the locking piece 41 and the locking piece 42, and is inserted into the locking rod. 43 for insertion and locking.

To attach or detach the wire from the wire insertion port 3, pull up the eldest child 43b with your fingers, slide the locking rod 43 against the coil spring 44, slide the guide tube 41a backward, release the lock of the locking rod 45, and remove the lower side 14. to open.

Further, when the lower side 14 is closed and the eldest child 43b is released from the hand while the locking rod 43 is retracted, the stored elasticity of the coil spring 44 automatically locks the child.

The connecting rope attaching portion 5 includes a protruding piece 51, a clamping plate 52, a tightening bolt 53, a screw hole 54, and a clamping groove 55, and is formed on each of the left and right sides 11 and 13.

A pair of protruding pieces 51 are formed to protrude from the lower end of the side surface in an opposing manner.
The clamping plate 52 is pivotally connected to the base pin 51a so that it can be opened and closed.

The clamping plate 52 is fixed to the side surface by screwing a tightening bolt 53 through a through hole drilled in the center of the clamping plate 52 into a screw hole 54 formed on the side surface opposite to the through hole. At the same time, the connecting rope inserted through the clamping groove 55 formed between the side surface and the palm facing surface of the clamping plate 52 is clamped.

To use this cross-shaped metal wheel in the prior art, since there are two connecting rope attachment parts 5, one can be used to connect the metal wheels on the same line, and the other can be used to connect the metal wheels between the upper and lower parts.

In this case, the cross wheel may be tilted, but since the wire insertion opening is formed into a circular shape with four pulleys, the wire will always slide on the pulley surface, so there is no problem.

In addition, by using this cross-shaped metal wheel, a new method for replacing overhead wires can be adopted that eliminates the need for metal wheels to be suspended from lines other than the old line.

This new method of re-covering the old line 10 as shown in Figure 3.
A required number of cross-shaped metal wheels 102 are suspended from the connecting rope 1, and the cross-shaped metal wheels 102 are connected to the connecting rope 103.
03 is connected to the self-propelled machine 104 suspended from the old line 101,
This self-propelled machine 104 is run, and the metal cross wheel 102 is suspended between the steel towers 105 and 106 at regular intervals, and then both ends of the connecting rope 103 are tensioned and fixed to the steel towers 105 and 106, and the old line 101 is With the connecting rope 103 loosened, the metal cross wheel 102 is suspended and supported between the steel towers 105 and 106, and the old wire 101 is supported by the lower pulley surface of the cross metal wheel 102, and the end of the old wire 101 is replaced. New line 107
Connect the old line 101 and connect the new line 107 to tower 1.
The bridge was crossed between 05 and 106, and the strained new line 1
07 to collect the cross gold wheel 102.

According to this new replacement method, only the old line is used, so there is no need to stop the lower power line even if the old line is a ground line.

Also, unlike in the past, there is no need for two upper and lower gold wheels.
The weight of the tool is reduced, the strength of the steel tower is increased, and the spacing between the metal wheels can be narrowed.

Therefore, the safety level of work is also improved.

When this cross-shaped metal wheel is suspended and supported by two connecting ropes, the cross-shaped metal wheel may be tilted depending on the supporting position of the steel tower, but this is not a problem for the above-mentioned reasons.

As described above, according to the present invention, pulleys are attached to each feeding direction of the cross-shaped metal wheel frame to form one circular wire insertion hole, and pulleys are attached to the left and right sides of the metal wheel frame, respectively. By installing the metal wheel connecting rope attachment part, the wire always slides on the pulley surface regardless of the inclination of the metal wheel, which prevents friction damage to the wire due to separation from the pulley surface and fluctuations in the dose attraction force. This makes it possible to improve the ease of work and safety.

Further, according to the present invention, it is possible to employ a new method for re-strapping overhead wires that eliminates the need for metal wheels to be suspended from wires other than the old wires.

[Brief explanation of drawings]

FIG. 1 is a front view showing one embodiment of the present invention, and FIG. 2 is a side view thereof. Figure 3 is an explanatory diagram of a new overhead wire re-stretching method using the cross-shaped metal wheel of the present invention, in which a shows the cross-shaped metal wheel suspended from the old wire, and b shows the cross-shaped metal wheel connected to the rope. This is a diagram showing the product being suspended and supported. 1... Gold wheel frame, 11... Left side of the gold wheel frame, 12... Upper side of the gold wheel frame, 13... Right side of the gold wheel frame, 14... ...Bottom side of gold wheel frame, 21.2
2, 23.24...Pulley, 3...Wire insertion port, 4...Opening/closing device, 5...Connecting rope attachment part, 51... ... protrusion, 52...
Clamping plate, 53...Tightening bolt, 54...
・Screw hole, 55...Pinch groove.

Claims (1)

[Claims] 1. The left side, top side, and right side of the three cross-sectional paths are integrally formed into an inverted T shape, and one end of the lower side of the three cross-sectional paths is pivotally connected to the lower end of the left side, and the other end is attached to the right side. A circle is formed at the center of the cross by mounting pulleys on each side of a metal wheel frame having a cross-section substantially cross-shaped, which is fixed opposite to the upper side by an opening/closing device mounted on the lower surface. A clamping plate pivotally attached to a shaped wire insertion opening and a protruding piece formed protruding from each side of the left and right sides is inserted through a through hole bored in the middle part of the clamping plate. The tightening bolt is fixed to each side of the left and right sides by screwing into a screw hole formed in each side of the left and right sides opposite to the through hole. A cross-shaped metal wheel comprising a connecting rope attaching part that clamps a connecting rope between the metal wheels in a pinching groove formed between the palm facing surface and the tip of the clamping plate.