JPS6015091B2 - Multi-conductor tension insulator device and wire tensioning method using it - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a multi-conductor tension insulator device that can accurately and easily perform wire tensioning work and has excellent strength, and a wire tensioning method using the same. .

As a multi-conductor tension insulator device in which tension clamps are secured to the top and bottom of a vertical yoke provided on the line side of the insulators, as in the four conductor tension insulator device shown in Fig. A right-angled clevis 24 is connected to each of the pond-like sides of the horizontally arranged insulator transport yoke 23 to which the insulator transport yoke 22 is connected via a connecting metal fitting 21, respectively. It is common to connect vertical yokes 26 each having conductor support holes 25 at the upper end and lower end to support the wires. vertical yoke 2
The upper end of the vertical yoke 26 and the connecting fitting 21 are connected in advance with the locking fitting 27, and the vertical yoke 26 is fixed so that it does not rotate in the vertical direction when the power transmission line is attached to the upper and lower ends of the vertical yoke 26 from above on a daily basis. After this lock fitting 27
This is done in the removal procedure.

However, in such a multi-conductor tensile insulator device, the locking fitting 27 must be connected to the fitting 28 attached to the upper end of the vertical yoke 26 and the top surface of the connecting fitting 21, which requires tensioning work on the upper power transmission line. In this case, as shown in Figure 6,
Most of the tension of the upper power transmission line acts on the locking fitting 27, and the tension To acting on this locking fitting 27 acts on the connecting fitting 21 as a vertical component T and a horizontal component P, which acts on the connecting fitting 21. It has the disadvantage of generating a very large bending moment. Therefore, in a multi-conductor tension insulator device whose component parts are overhead wire fittings that are generally designed considering only the load conditions during normal use, that is, the longitudinal load of the transmission line, the connection fittings 2 and insulator lotus yoke 2
In order to avoid the risk of deforming or breaking the 3 or right-angled crepis 24, the individual overhead wire fittings are necessarily thick and large, making them inconvenient to handle. Also"
Such a multi-conductor tension insulator device must be fixed with the lock fitting 27 with the center lines of the vertical yoke 26 and the connecting fitting 21 substantially perpendicular to each other for tension work.
The vertical rotation angle Q of 6 is constant, and the insulator 2
If the distance between the vertical yoke 26 and the vertical yoke 26 is narrow, the vertical rotation angle of the vertical yoke 26 becomes very large, making it difficult to perform wiring work on the lower power transmission line. The present invention has been completed with the aim of solving the above-mentioned problems and a tensile insulator device for multi-conductors, and a multi-conductor method using the same. Explain.

Figures 1 to 4 show a four-conductor tension insulator device as an embodiment of the present invention, in which 1 is a set of two series of insulators 2 each having one end that can only be rotated in the vertical direction. The end of each connecting fitting 1 is connected to one end of the insulator chain yoke 3 so that it can rotate only in the horizontal direction.

Reference numeral 4 denotes a right-angled clevis connected to both sides of the other end of the insulator yoke 3 so as to allow rotation only in the horizontal direction, and a vertical yoke 5 is connected to the other end of each right-angled clevis 4 on one side. They are connected at the center so that only rotation in the vertical direction is allowed, and the front part of each vertical yoke 5 has a conductor support hole 6 at the upper end, and a conductor support hole 7 and a conductor at the lower end. A small hole is provided as a wire tension worker odor attachment part 9.

Reference numeral 10 denotes an upper connecting fitting whose one end is connected to one conductor support hole 6, and the upper connecting fitting 10 has a right angle clevis that is only allowed to rotate in the vertical direction with respect to the vertical yoke 5, and a right angle clevis that is only allowed to rotate in the vertical direction. A large number of overhead wire fittings 11 such as clevises that are only allowed to rotate in the horizontal direction are connected, and in the middle there is a metal fitting 16 with a locking hole, which will be described later, and a removable locking metal fitting part 12. A one-piece triangular metal fitting with a stopper hole is provided, and a bracket 13 that is only allowed to rotate in the vertical direction is connected to the end of the upper connecting metal fitting 10.

Reference numeral 14 denotes a lower connecting fitting with one end connected to the other conductor support hole 7, and the lower connecting fitting 14, like the above-mentioned upper connecting fitting 10, is made by connecting a number of overhead wire fittings 15 such as right-angled clevises. In the middle of the lower connecting fitting 14, there is provided a two-piece triangular-shaped fitting with a stopper hole 16 for engaging and detaching the intermediate fitting part 12 of the upper connecting fitting 10 with a pin. The connecting fitting 14 is the fitting locking part 1
2, and furthermore, a lower tension clamp 17 is connected to the tip of the lower connecting fitting 14 so as to allow rotation only in the vertical direction. ing.

In addition, 8 in the figure is a conductor support hole 7 at the lower end of the vertical yoke 5.
This is a small hole for locking an auxiliary locking member provided between the conductor tensioning tool mounting portion 9 and the conductor tensioning tool mounting portion 9 as necessary.Although the system locking hole fitting is described as a two-piece piece in this embodiment, it can also have the same effect. It does not have to be a two-piece item as long as it has a function. Furthermore, the positions of the metal fitting locking portions 12 and metal fittings with locking holes 16 provided on the upper connecting metal fitting 10 and the lower connecting metal fitting 14 are as shown in FIG.
The transmission line sides of the upper connecting fitting 10 and the lower connecting fitting 14 connected to the upper and lower sides of the vertical yoke 5 are formed into a substantially triangular shape by directly connecting the fitting locking portion 12 and the locking hole of the system locking hole fitting 16 with a pin. When this happens, the conductor support hole 6 above the vertical yoke 5 that connects the upper connecting fitting 10 is located at the position where the vertical yoke is assumed to be in use.
Conductor yoke perpendicular line b-b, which is an imaginary line drawn perpendicular from
The angle 8 formed by the angle 8 is an obtuse angle close to a right angle. The procedure for overhead line work for the multi-conductor tensile insulator device constructed in this way will be explained with reference to Figures 2, 3, and 4. First, as shown in Figure 2, the line side of the insulator chain will be Upper connecting fittings 1 are installed above and below the vertical yoke 5 provided.
0 and the lower connecting fitting 14, and this upper connecting fitting 10
The locking hole of the locking metal locking part 12 and the lower continuous metal fitting 1
The vertical yoke 5, a part of the upper connecting fitting 10, and a part of the lower connecting fitting 14 which acts as a locking fitting are made into three sides by directly connecting the locking hole of the system fitting 16 with a locking hole in No. 4 with a pin. The power transmission line 18 is formed into a substantially triangular shape, and the power transmission line 18 is connected to the line-side end of the upper connecting fitting 10 to a tension clamp 13 such as a compression tension clamp.

In this case, since the compression tension clamp serving as the upper tension clamp 13 connecting the power transmission line 18 is on the same line as the insulator transport yoke 3, the vertical yoke 5 is connected to the upper connection fitting 10.
The vertical rotation angle Q of the vertical yoke 5 should be set as small as possible when designing the device, since it is desirable to make this vertical rotation angle Q as small as possible from the standpoint of line work. The position of the locking hole as the locking fitting latching portion 12 and the locking hole in the metal fitting with a stopper hole shall be determined by considering Q. Therefore, as shown in FIG. 2, the tension of the power transmission line 18 is
0 and the lower connecting fitting 14, which also serves as a locking fitting, and act on the upper and lower sides of the vertical yoke 5, and the load direction acting on the vertical yoke 5, the upper connecting fitting 10, and the lower connecting fitting 14 is normal when all three are used. Since this is the load-bearing direction that was considered when designing each metal fitting, it is possible to prevent deformation and destruction of each catenary metal fitting during overhead line work. Next, as shown in FIG. 3, a pulley 19 as a conductor tensioning tool is attached to the conductor tensioning tool attachment part 9 provided at the lower end of the vertical yoke 5 via overhead wire fittings and wire ropes, and the other end When the lower power transmission line 18' is connected to a compression tension clamp as the lower tension clamp 17, and the wire rope 20 of the pulley 19 is hoisted up with a winch or the like to pull the lower power transmission line, the vertical yoke 5 is Rotating from the state shown by the chain line to the state shown by the solid line, each degree 8 is formed by the wisteria line a-a of the upper connection metal 10 and the conductor yoke vertical line b-b centered on the conductor support hole 6 of the vertical yoke 5. '
Since the angle is close to a right angle, the lower connecting fitting 14 sag downward. Therefore, when the lower power transmission line 18' reaches the required close contact state, the pin connecting the metal locking part 12 of the upper connecting fitting 10 and the locking hole of the system locking hole fitting 16 of the lower connecting fitting 14 At the same time as removing the lower power transmission line 18', attach the upper connecting bracket 1 with a rope so that it does not get in the way when installing the lower power transmission line 18'.
01 The line side end of the lower connecting fitting 14 that has been fixed.
, and while keeping the lower power transmission line under tension using the pulley 19 as a conductor tensioning tool, attach the other end of the lower connecting metal fitting 14, that is, the line side end, to the end of the lower tension clamp 17 as indicated by the broken line arrow. Concatenate as shown. As shown in FIG. 4, when the wire rope 20 of the pulley 19 is gradually loosened, the tension of the power transmission line 18' is transferred from the pulley 19 to the lower connecting fitting 1.
4 and the tension acting on the pulley 19 becomes no load, so the pulley as a conductor tensioning tool can be easily removed. In the illustrated embodiment, the insulator yoke 3 and the vertical yoke 5 are separate bodies, but the same effect can be obtained even if a fixed yoke is used in which the insulator yoke 3 and the vertical yoke 5 are integrated by welding or casting. It is expected that the yoke structure is not limited to that shown in the example, and
Although the illustrated embodiment is a two-lotus tension insulator device, the present invention is not limited to such a device, and can of course be applied to a multi-conductor tension insulator device depending on the application, such as a four-lotus tension insulator device. As is clear from the above embodiments, the first invention provides a locking fitting retaining portion between the conductor attachment hole at the upper end of the vertical yoke and the upper connecting fitting interposed between the upper tension clamp. Since a part of the lower connecting fitting can be stretched as a locking fitting between the lower end of the vertical yoke only during tensioning work, it is possible to connect the insulators and the insulator lotus yoke during tensioning work. There is no risk of deformation or destruction of the metal fittings, insulator yoke, and vertical yoke, and therefore, these parts can be made thinner and smaller, making them easier to handle. Since a part of the lower connecting fitting can be used as a locking fitting to be stretched between the two parts, there is no need to prepare a separate locking fitting. There is no need to remove one end of the lock fitting from the lower end of the vertical yoke, and the second invention is a wire tensioning method using the multi-conductor tension insulator device according to the first invention. By simply hanging a part of the lower connecting fitting between the lower end of the vertical yoke and the middle locking fitting part of the upper connecting fitting, the vertical yoke can be moved up and down during heavy line work. In addition to preventing large rotations in the direction, the vertical rotation angle of the vertical yoke can be changed by appropriately changing the length of the lower connecting bracket or the lower connecting bracket attachment point of the vertical yoke, making line work easier. Furthermore, there are various advantages such as ease of handling since no excessive force is applied to the overhead wire fittings during wire tensioning work, and this is an extremely significant contribution to the industry.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view showing a first embodiment of the device of the present invention, and FIGS. 2, 3, and 4 are procedures for tensioning the tensile insulator device for multi-conductors according to the present invention. FIG. 5 is a partially cutaway perspective view showing an example of a conventional tension insulator device for multiple conductors, and FIG. 6 is an explanatory view of the operation of the conventional tension insulator device for multiple conductors. 5: Vertical fork, 6: Conductor support hole, 7: Conductor support hole, 9
: Conductor tensioning tool attachment part, 10: Upper connecting fitting, 12: Locking fitting part, 13: Tension clamp, 14: Lower connecting fitting, 16: Fitting with system stopper hole, 17: Tension clamp. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] 1. A lower connection in which a conductor support hole 7 and a conductor tensioning tool attachment part 9 are provided in the lower end portion of the vertical yoke 5, and a metal fitting 16 with a system stopper hole is provided in the middle of the conductor support hole 7. A lower tension clamp 17 is connected via a metal fitting 14, and a conductor support hole 6 is provided in the upper end portion of the vertical yoke 5, and the metal fitting 16 with a stopper hole is provided in the middle of the conductor support hole 6. A multi-conductor tension insulator device characterized in that an upper tension clamp 13 is connected via an upper connection fitting 10 provided with a removable locking fitting part 12. 2. Connect one end of the upper connecting fitting with a locking fitting part in the middle to the conductor support hole provided at the upper end of the vertical yoke provided on the line side of the insulator chain, and connect the lower end of the vertical yoke. One end of the lower connecting fitting is connected to the conductor support hole provided on one side, and one end of the lower connecting fitting is connected to the middle metal locking part of the upper connecting fitting, and one end is connected to the middle of the lower connecting fitting connected to the lower end of the vertical yoke. After connecting the provided fittings with stopper holes to form a nearly triangular shape with the vertical yoke, upper connecting fitting, and lower connecting fitting as three sides, connect the power transmission line to the line side end of the upper connecting fitting using an upper tension clamp. Then, a conductor tensioning tool is attached to the conductor tensioning tool attachment part provided at the lower end of the vertical yoke, and a lower tension clamp with a power transmission line is connected to the conductor tensioning tool, and the power transmission line is connected to the conductor tensioning tool. When the power transmission line has reached the required tension state by indexing, the metal fitting with the system locking hole and the metal locking part of the upper connecting metal fitting are unlatched, and the tension of the lower power transmission line is released using a conductor tensioning tool. The tension clamp for multiple conductors is characterized in that the other end of the lower connecting fitting is connected to a lower tension clamp while maintaining the same, and finally the power transmission line is released from pulling by the conductor tensioning tool and the conductor tensioning tool is removed. A tensioning method using an insulator device.