JPH0471314A - Wedge type tension resistant clamp and aerial transmission line tightly drawn wire using said clamp - Google Patents

Abstract

PURPOSE:To facilitate wedge pressing operation by a wedge presser by providing a wedge inserted between a guide plate and a wire guide groove to hold a wire in the groove, and a jumper retainer for clamping the jumper of the wire by the wedge. CONSTITUTION:A marking position of a wire 35' is provided at an opposite position of a guide plate 7, a wedge 22 is inserted between the plate 7 and the wire 35', the wedge is pressed by a wedge presser to secure the wire 35 '. Here, when U-shaped bolts 29, 29 are inserted into the bolt holes 25, 25 of the wedge 22 and nuts 30, 30 engaged therewith are clamped to hold a jumper wire 45 by the rear end of the wedge 22 and a jumper retainer 20, a second wire tightening tool 44 is loosened. Further, after the slackness of the wire is confirmed, come-alongs 36, 41 and wire tightening tools 39, 44 are removed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a wedge-type tension clamp for securing overhead power transmission lines and an overhead power transmission line tensioning method using the wedge-type tension clamp.

[Conventional technology]

The wedge type tension clamp is, for example, as shown in FIG. It is rotatably mounted on a pivot 55, and a wedge 58 is arranged between the bottom part 56 of the triangular plate 53 and the guide groove 51,
This wedge is for sandwiching the electric wire 57 between the guide groove 51 and the jumper guide 59 on the jumper side of the wedge 58.
is installed.

In the tensioning work of tension insulator equipment equipped with this wedge-type tension clamp, for example, as shown in Fig. 6, the electric wires to be
The come-along 61, which is locked to the steel tower, and the Y-shaped connecting device 54, which is connected to the insulator link 62 on the steel tower side, are connected using a tensioning device consisting of several fishing wheels 63, wires 64, etc., and the wire 64 is pulled in to connect the electric wire. 57 and Insulator 62 were pulled up and a temporary cordon was established. After that, the electric wire 5 from the tower from the installation position of Come Along 61
Mark the installation position of the wedge-type tension clamp at 7', insert this electric wire 57' into the clamp body 52, and then
When the free end of the shaped connecting fitting 54 and the triangular plate 53 are attached to the clamp body 52 by the pivot 55, a wedge 58 is inserted between the masking position of the electric wire 57' and the triangular plate 53, and this wedge is The pushed-in electric wire 57' was fixed to the clamp body 52 by a wedge pusher hooked onto the stepped portion 66 of the clamp body 52. After that, loosen the wire 64 and transfer the tension to the wedge-type tension clamp, then move the come-along 61 and the fishing wheel 63.
, the wire 64 and the like were removed from the electric wire 57 and the connecting fitting 54.

[Problem to be solved by the invention C] However, when the wedge 58 is pushed into the clamp body 5 by the wedge pusher,
2, the clamp body 52 is rotatably attached to the free end of the Y-shaped insulator side connecting fitting 54 about the pivot shaft 55, so the clamp body 52 rotates about the pivot shaft 55.

For this reason, not only is it difficult to perform the wedge-pushing operation, but it also takes a long time to ensure sufficient wire grip strength. In addition, since the jumper angle α of the clamp body is small at around 25 degrees, the wire gripping performance due to the wedge effect is poor, and
The jumper guide 68 attached to the wedge 58 has the disadvantage that it becomes long because it guides a portion of the jumper of the electric wire downward.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a wedge-type tension clamp that allows the wedge pushing operation to be performed easily and quickly using a wedge pushing device and eliminates the need for a jumper guide.

Means for Solving Problem C] In order to achieve this object, in the wedge-type tension clamp of the present invention, a wire guide groove is formed at the bottom of the arm portion having a U-shaped cross section, and a wire guide groove is formed below the wire intake end. Create holes for line work,
One end of the insulator side connecting fitting is rotatably attached to the apex part, and a guide plate facing the wire guide groove is rotatably attached to the jumper side, and a stepped part for hooking the wedge pusher is attached to both outer sides of the jumper side. a wedge for inserting between the guide plate and the wire guide groove to clamp the wire between the wire guide groove; and a wedge for clamping the jumper portion of the wire with the wedge. The jumper angle of the wire guide groove of the clamp body, which consists of a jumper holder for
°The jumper guide is removed from the jumper holder by attaching it to the front and back.

The above-mentioned overhead power transmission line tensioning method using the wedge-type rigid clamp connects the insulator link on the tower side connected to the electric wire side connecting fitting and the electric wire locked at the first come-along, and connects the electric wire side connecting fitting to the first come-along. When the wire is tensioned with the first tensioning tool, the second come-along connected to the tensioning hole of the wedge-type tension clamp via the second tensioning tool locks the wire coming from the tower from the first come-along position. At the same time, a wedge-type tension clamp that takes in the electric wire is connected to the free end of the electric wire side connecting fitting, the first wire tensioning device is loosened, and the electric wire tensioning load is transferred to the second come-along. 1st
When the wire tensioning tool is removed from the wire and/or the wire-side connecting fitting, (a wedge pusher is attached to the stepped part of the wedge-type tension clamp, and the wedge pusher is inserted between the wire in the wedge-type tension clamp and the connecting plate. The electric wire is clamped to the wedge-type tension clamp by pushing in the wedge, and then the second wire tensioning tool is loosened to transfer the electric wire tensioning load to the wedge-type tension clamp.

[For production]

When the electric wire 35 latched by the first come-along 36 and the insulator link 17 on the tower side connected to the electric wire side connecting fitting 19 are stretched using the first tensioning tool 39, the wire tensioning hole 4 of the clamp body 11 is inserted into the tensioning hole 4 of the clamp body 11. The electric wire 35' from the steel tower is locked from the position of the first come-along 36 by the second come-along 41 connected via the second wire tension tool 44. On the other hand, the clamp body 11 is connected to the electric wire 3
5' and connect the wire side connecting fitting 1 via the insulator side connecting fitting 5.
Connect to the free end of 9. Here, the first wire tensioning tool 39 is loosened, the wire tensioning load is assigned to the second come-along 41 and the second wire tensioning tool 44, and the first come-along 36 and the first wire tensioning tool 39 are attached to the wire 35 and/or the wire side. When removed from the connecting fitting 19, the tensioning hole 4 of the clamp body 11 and the insulator side connecting fitting 5 are located on the axis of the tensioned electric wire and the insulator chain (FIG. 4). Next, insert several wedge pushers into the steps 1212 on both sides of the clamp body 11, and use the wedge pusher to push the wedge 22 between the electric wire 35 and the guide plate 7 in the clamp body, or do not use this wedge pusher. , the clamp body 11 is connected to the wire-side connecting fitting 19 on the axis of the tensioned wire and the second tension tool 44, and since the wedge pushing direction passes through the tensioned wire axis, when pushing the wedge 22, the clamp body does not rotate. Clamp body 11 for electric wires
When the wire is fixed, the jumper part of the wire is clamped between the wedge 22 and the jumper holder 20, and then the second tensioning tool 44 is loosened, and the wire tensioning load is transferred to the wedge-type tension clamp, and then the come-along 3641 and line tension equipment 39.44 have been removed.

Since the electric wire 35 is fixed by a wedge action to a wedge-type tension clamp having a jumper angle of about 60°, it is expected that the gripping force will be lower than that of conventional products with a jumper angle of about 25°.

〔Example〕

Embodiments of the present invention will be described based on the drawings.

In FIGS. 1 and 2, a wire guide groove 3 is formed in the bottom part 2 of the arm part 1 which is a U-shaped recessed part and has a substantially triangular shape.
A wire tensioning hole 4 is provided below the wire intake end, a pivot 6 is provided at the apex for rotatably attaching the insulator side coupling fitting 5, and the jumper side faces the wire guide groove 3. do 3
Rotatably attach the square guide plate 7 1. A clamp body 11 is constructed by attaching a port 8 and a nut 9 for tightening the clamp, and further forming a recess 10 for hooking an arm of a wedge pusher (not shown) on the outer side surface of the jumper side. The recess 10 allows the tip of the arm of the wedge pusher to be inserted diagonally from below, and an example of the jumper side of the recess is a step 12 that is perpendicular to the wire guide groove 3, and a window 13 is bored in the upper part. It is set up. Note that the jumper angle of the wire guide groove 3 is set to 60°.

At the insulator side end of the insulator side connecting fitting 5 attached to the clamp body 11 by the pivot 6, a bolt and a A bifurcated portion 15 and a bolt hole 14 are formed for connection with a nut. The guide plate 7 is in contact with the slope 23 of the wedge 22 at its base 21 and guides the wedge 22. The wedge 22 has a wire holding groove 24 formed opposite to the wire guide groove 3 on the opposite side of the slope 23, and projecting protrusions 26.26 with bolt holes 25.25 formed on both sides of the base. There is. 20 is the rear part of the wedge part 22 and jumper vA45
A jumper holder that clamps a wire holder facing the wire holder groove 24: a holder 28 formed with #V27 and a U that fits into this and is inserted into the bolt hole hole 2525 of the wedge 22.
Consists of bolt 29.2'9 and nut 30.30.

Next, an overhead power transmission line tensioning method using the wedge width tension clamp of the embodiment will be explained with reference to FIGS. 1 to 4. In FIG. 3, a first come-along 36 fixed to an electric wire 35 to be wired and a triangular plate 19 connected to the steel tower 40 side via an insulator link 17 are connected by several fishing wheels 37, wires 38, etc. The first tensioning tool 39 is used to connect the wires, and the wire 38 is pulled in, and the electric wire 35 and the insulator link 17 are pulled out to create a temporary tensioning line. Next, from the position of the first come-along 36, the electric wire 35 near the steel tower 40
' is marked to indicate the installation position of the wedge-type rigid clamp, and the connecting fitting 5 is attached to the clamp body 11 incorporating the electric wire 35 with the pivot 6, and this connecting fitting is attached to the triangular plate 19.
is connected to the free end with a bolt 16 and a nut. Further, a second come-along 41 connected to the wire tensioning hole 4 of the clamp body 11 via a second wire tensioning tool 44 consisting of several fishing wheels 42, a wire 43, etc., connects the electric wire 35' from the first come-along 36. to lock. Loosen the iron and the first wire tensioning tool 39 and transfer the wire tensioning load to the second come-along 41 and the second wire tensioning tool 44. and/or removed from the triangular plate 19. As a result, the wire tensioning hole 4 and the pivot shaft 6 of the clamp body 11 are located on the axis of the tensioned wire and the insulator chain 17, and the clamp body 11 is almost fixed, so that the stepped portions 12 on both sides of the clamp body 11, Hang the wedge pusher on 12 and fasten it with J to perform the wedge pushing work. That is, the merging position of the electric wire 35' is set at a location opposite to the guide plate 7, and the guide plate 7 and the electric wire 3
5' (insert the wedge 22, and push this wedge in with a wedge pusher to fix the wire 35' to the clamp body 11. Now, insert the U bolt 2929 fitted into the holding fitting 28 into the pin I of the wedge 22.・When the jumper wire 45 is clamped between the rear part of the wedge 22 and the jumper holding tool 20 by tightening the nuts 1-30.30 inserted into the hole 25.25 and screwed therein,
Loosen the second wire tensioning tool 44, transfer the wire tensioning load to the wedge-type tension clamp, roughly check the slackness of the wire, and then remove the come-along 36, 41 and the wire tensioning tool 3944.

[Effects of the Invention] Since the present invention is configured as described above, it produces the following effects.

(1) There is an advantage that the wedge pushing operation can be performed easily and quickly because the clamp body does not rotate when pushing the rust between the electric wire in the clamp body and the guide plate (using the rust pusher).

(2) Since the jumper angle of the clamp body is set at around 60°, the power to grip the electric wire by the wedge is improved compared to conventional products where the jumper angle is around 25°, and a jumper guide is not required.

[Brief explanation of drawings]

FIG. 1 is a side view of a wedge-type tension clamp according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line AA of the same, and FIGS. 3 and 4 show an overhead power transmission line using the wedge-type tension clamp. Fig. 5 is a side view of a conventional wedge-type tension clamp, and Fig. 6 is an illustration of an overhead power transmission line tensioning method using the wedge-type tension clamp. 1. Arm part, 2. Bottom part, 3. Wire guide groove, 4
... Hole for wire tension work, 5.. Insulator side connection fitting, 7.. Guide plate, 11.. Clamp body, 12.. Step part, 17.. Insulator chain, 19.. Wire side connection fitting, 20.・Jumper holder, 22 ・・Wedge, 35.35' ・・Electric wire, 36
・1st come-along, 39 ・1st strain equipment, 2nd come-along, ・For 2nd strain

Claims (1)

[Claims] 1. A wire guide groove (3) is formed in the bottom (2) of the arm portion (1) with a U-shaped cross section, and a wire tensioning hole (4) is provided below the wire intake end. , one end of the insulator side connecting fitting (5) is rotatably attached to the apex part, and a guide plate (7) facing the wire guide groove (3) is rotatably attached to the jumper side, and furthermore, one end of the insulator side connecting fitting (5) is rotatably attached to the jumper side. Stepped part (12) for hanging the wedge pusher
a clamp body (11) formed of a
7) and the wire guide groove (3) to sandwich the wire (35) between the wire guide groove (3) and the wedge (22). A wedge-type tension clamp consisting of a jumper holder (20) for clamping. 2. Set the jumper angle of the wire guide groove (3) of the clamp body (1) to around 60°, and use the jumper holder (20)
2. The wedge type tension clamp according to claim 1, wherein the jumper guide is eliminated from the wedge type tension clamp. 3. The electric wire (17) on the tower side connected to the electric wire side connecting fitting (19) and the electric wire (36) locked with the first come-along (36)
35) with the first tensioning tool (39) that connects the wire-side connecting fitting (19) to the first come-along (36), the first wire tensioning hole (4) of the wedge-type tension clamp is inserted. The second come-along (4) connected via the second tension line tool (44)
At step 1), lock the electric wire (35') from the steel tower from the position of the first come-along (36), and
A wedge-type tension clamp is connected to the free end of the wire side connecting fitting (19), and the first wire tensioning tool (39)
Loosen and transfer the wire tensioning load to the second come-along (41), then connect the first come-along (36) and the first wire tensioning tool (3).
9) to the electric wire (35) and/or electric wire side connection fitting (19)
When the wedge type tension clamp is removed, a wedge pusher is attached to the stepped part (12) of the wedge type tension clamp, and the wedge pusher is used to insert the wedge (22) between the electric wire inside the wedge type tension clamp and the connecting plate (7).
A wedge-type tension clamp characterized in that the electric wire is clamped to the wedge-type tension clamp by pushing in, and then the second tension tool (44) is loosened so that the wire tensioning load is transferred to the wedge-type tension clamp. Tightening method for overhead power transmission lines using 4. A method for tensioning overhead power lines using a wedge-type tension clamp according to claim 3, wherein the wire-side connecting fitting (19) is a triangular plate having bolt holes at each vertex.