JP6647953B2 - Reversing type lift truck equipment for overhead transmission line replacement method - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reversing hanger wheel used when replacing an existing two-conductor overhead power transmission line, and more particularly, to a reversing hanger wheel device that contributes to removal of an existing electric wire and improvement in safety of a new wire drawing operation. .

  As a method of replacing overhead power transmission lines, a method as shown in Patent Literature 1 below is known. The replacement method described in the document uses one of the existing two-conductor power transmission lines as a support bus, suspends the other wire on the support bus, and replaces the wire first.

  The work is carried out with the reversing suspension wheel device attached to the two transmission lines to be removed at predetermined intervals.

  The reversing type swing wheel device is a device in which two lift wheels are connected to each other by a connecting member, and each of the hook wheels is configured to pass an electric wire between a plurality of rollers supported by a frame. And can be used inverted.

  Attach the two suspension wheels connected by the connecting material to the two transmission lines to be removed, and first use the wire to hold the wire used as the support bus with a steel tower, and in this state, also use the wire Separate the other electric wire held in step from the insulator connecting device.

  Then, the position of the electric wire is lowered while gradually pulling out the retained wire. As a result, the other electric wire moves below the supporting bus and is lowered by the electric wire and is supported by the hanging wheel having the inverted posture.

  Then, a new line is connected to one end of the other suspended electric wire (one old wire), and the other electric wire is pulled out from the other end side. Then, the new wire replaced with the other wire is fixed to the steel tower by applying a predetermined tension, and the new wire is used as a support bus, and the wire previously used as the support bus in the same procedure as above (the other old wire) Line).

  In addition, in the reversing type hanging wheel device shown in Patent Document 1, the two hanging wheels are connected by a rope, but as shown in Patent Document 2 below, two arms are combined. There is also known a reversing suspension wheel device in which two suspension wheels are connected via a link.

  Further, as a hanging wheel that can be used in reverse, there is also known one described in Patent Literature 3 below in which each hanging wheel is configured by two or more rollers. Patent Literature 3 discloses a hanging wheel in which two horizontal rollers arranged in parallel and two horizontal rollers also arranged in parallel are arranged, and three rollers are provided on each side of an equilateral triangle. Two types of hanging wheels are described in such a way that they can be combined with one another.

JP 2005-295681 A JP 2005-295660 A JP-A-10-243512

  According to the method of replacing one existing two-conductor transmission line by alternately using one and the other of the two overhead transmission lines as a supporting bus, the amount of sagging of the electric wire at the time of replacement is reduced, and as a result, the suspension is performed. It is known that the rolling of the electric wire caused by the wind can be suppressed to be smaller than the method of hanging the electric wire on a rope.

  However, when a reversing type hanger wheel in which two hanger wheels are connected by a rope is used as in the method of Patent Document 1, the degree of freedom of rolling of the electric wire hung on the supporting bus is large. In particular, in the case of replacing a transmission line over a strait or the like that is likely to be exposed to strong winds, the suspension of the suspended electric wire becomes particularly large, making it difficult to secure work safety.

  In an overhead power transmission line in which another transmission line is present beside the two-conductor transmission line to be replaced, the existing transmission line at a position close to the another transmission line (live line) while continuing the transmission by the another transmission line. In some cases, it is necessary to replace the two-conductor power transmission line, and in such a case, it is required to minimize the swing of the wire being replaced to the live line side.

  The reversing type hanging wheel device used in the method of Patent Document 1 has a shortage of reliability and is difficult to use when there is the above demand.

Further, as shown in FIG. 7, in the reversing type hanging wheel device disclosed in Patent Document 2, the two arms _22-1 and _22-2 are hinged to connect the two hanging wheel wheels 21 and 21. Since the connection is performed by the connected connecting member 22, the horizontal swing of the suspended electric wire can be suppressed as compared with the reversing type suspension wheel using the rope as the connecting member.

  However, the reversing type hanger wheel of Patent Literature 2 in which there are only three hinge portions 23 between the two hanger wheels 21 and 21 is used when suspending an electric wire to be replaced first, for example, W2 on a supporting bus. It has been found that the electric wire W2 tends to move toward the final suspension point while bulging away from the electric wire W1 on the side serving as the supporting bus.

The arms 22 _-1 and 22 _-2 forming the connecting member 22 have connection angles θ1 and θ2 of FIG. 7 which are the minimum connection angles in order to maintain the distance between the electric wires W1 and W2, and further connection angles from here. The rotation in the decreasing direction is prevented by the stopper.

  Due to this, when suspending one of the electric wires, for example, W1 to the supporting bus and the other electric wire W2 to the supporting bus, the electric wire W2 must be lowered while expanding in a direction away from the electric wire W1. Seem.

  As described above, when an overhead transmission line of a live line exists near a two-conductor transmission line to be replaced, it is not preferable that the wire being relocated swings to the hot line side in order to maintain a safe insulation interval. .

  Therefore, an object of the present invention is to provide a reversible hanging wheel device with higher safety than that described in Patent Document 2.

In order to solve the above-mentioned problem, in the present invention, a reversing type lifter device for an overhead power transmission line replacement method in which two lifter wheels are connected via a connecting member is configured as follows.
That is, each of the hanging wheels is composed of a main roller supported by electric wires, two sub-rollers smaller in size than the main roller, and a frame supporting these rollers. , At the bottom of the inverted isosceles triangle, the two sub-rollers are respectively disposed at the other two sides of the inverted isosceles triangle,
The connecting member is configured by combining a connecting link in which three or more links having different lengths are sequentially hinged and a stopper that prevents the link from rotating from a minimum connection angle position to a connection angle decreasing direction. The universal joint (the direction orthogonal to the axis of the main roller) is provided such that the link on one end side of the connecting member is located below the hanging wheel and the link on the other end side is located below the other hanging wheel. ) Using a horizontal pin (not shown).

  In this reversing type suspension wagon device for the overhead power transmission line replacement method, three links having different lengths are connected in order of the longest link, the intermediate length link, and the shortest link. It is preferable that the connecting member is constituted by a connecting link.

  In addition, the main roller and the sub-roller of each lifting wheel each have a rolling surface of a concave arc, and the main roller and the sub-roller are supported by the frame and the electric wire drawing approximates a circle between the rollers. It is preferable that a through space is formed. Between the main roller and the sub-roller, an auxiliary piece that fills a gap generated between the rolling surfaces of the rollers can be provided as necessary.

  In addition, it is also preferable to employ resin rollers as the main roller and the sub-roller constituting the hanging wheel.

  In the reversing type hanger wheel device of the present invention, two hanger wheels mounted on the two electric wires to be reconnected are connected to each other by using a connecting member in which three or more links are sequentially hinged. When one of the electric wires is used as a supporting bus and the other electric wire is suspended from the supporting bus, the other electric wire hangs in a direction away from the supporting bus without greatly expanding.

  This is because four or more joints are formed between the two hanger wheels by forming the connecting member with three or more links, thereby increasing the degree of freedom of rotation of the connecting member. .

Inverting type suspension gold vehicle device of FIG. 7 constitute a connecting member in the two links, when lowering the one of the wires from the overhead line position, the arm 22 _-1, 22 _-2, mutual connection from the state of FIG. 7 Rotation in the direction in which the angle θ1 or the connection angle θ2 with the clevis 24 decreases is prevented by the stopper. Therefore, one of the electric wires must be lowered while expanding in a direction away from the electric wire on the side forming the supporting bus.

  On the other hand, according to the reversing type hanging wheel device of the present invention, when the position of one of the electric wires is lowered, at least one of the links constituting the connecting member is rotated in a direction in which the stopper is not restricted by the stopper to prevent the connection angle fluctuation. Move.

  Therefore, the restriction of the movement of the electric wire by the connecting member is relaxed, and the position can be lowered while suppressing the lateral expansion. Accordingly, even when the two-conductor power transmission line to be replaced is located at a position close to the hot wire, it is possible to perform the replacement work while suppressing the deflection of the wire toward the hot wire.

  The connecting member constituted by the connecting link has a moderate weight unlike the rope, and has a smaller degree of freedom in bending than the rope. Therefore, the swing of the electric wire hung on the supporting bus bar due to the wind can be suppressed to be smaller than that of the reversing type hanging wheel device using the rope as the connecting member.

  In addition, the connecting member composed of a plurality of links increases the degree of freedom of bending as the number of joints increases. The degree of freedom is so high that the effect of suppressing the swing of the suspended electric wire is reduced.

  Therefore, it is preferable that the number of links constituting the connecting member is a number that does not wastefully increase the degree of freedom of bending.

  Three links with different lengths are linked in the order of the longest link, the intermediate length link, and the shortest link, and the two links are connected by this link. The production time was low and the performance was good.

  In the reversing type swing wheel device of the present invention, since the two lift wheels are composed of the main roller supported by the electric wire and the two auxiliary rollers smaller than the main roller, the size of the lift wheel is reduced. Is not increased unnecessarily, and the overall size can be reduced.

  In addition, a reversing type lifter device provided with a lifter wheel in which an electric wire drawing space approximate to a circle is formed between a main roller and a sub roller is described in Patent Document 3 including three rollers. Compared with such a conventional suspension wheel, the reversal of the suspension wheel when suspending one of the electric wires proceeds smoothly, and the safety of the operation of suspending the electric wires is enhanced.

  An auxiliary piece is provided between the main roller and the auxiliary roller to fill the gap between the rolling surfaces of the two rollers. There is no worry about being pinched or hitting the edge of the roller.

  In the case where the main roller and the sub roller of the hanging wheel are made of resin, the weight of the hanging wheel is reduced and the handle wheel is easy to handle.

It is a front view showing an example of the reversing type hanging wheel device of the present invention. FIG. 2 is an explanatory view of a situation in which a hanger wheel on one side of the reversing type hanger wheel device of FIG. It is a side view which shows the reversing | reversing state of one side suspension wheel of the reversing type suspension wheel device of FIG. FIG. 2 is an enlarged front view of a hanger used in the reversing hanger wheel device of FIG. 1. FIG. 2 is an enlarged side view of a hanger used in the reversing hanger device of FIG. 1. FIG. 2 is an enlarged plan view of a hanger used in the reversing hanger device of FIG. 1. It is a front view showing the conventional example of a reversing type hanging wheel device.

  An example of the reversing type hanging wheel device of the present invention will be described with reference to FIGS. The illustrated inverted hanging wheel device 1 includes two hanging wheels 2, 2, a connecting member 3 that connects the two hanging wheels 2, and rotation of a link that forms the connecting member ( (Bending).

  The hanging wheel 2 has one main roller 5 and two sub-rollers 6, 6 smaller in size than the main roller attached to the frame 7, and further, between the main roller 5 and each sub-roller 6. The auxiliary piece 8 is provided.

  The main roller 5 is arranged on the bottom side of the inverted isosceles triangle, and the two sub-rollers 6, 6 are arranged on the other two sides of the inverted isosceles triangle.

  The main roller 5 and the sub-roller 6 have rolling surfaces 5a, 6a each having a concave arc. The rolling surfaces 5a and 6a have an arc radius of a concave arc so that the main roller 5 and the sub-roller 6 are supported by the frame 7 so that an electric wire drawing space 9 approximate to a circle is created between the rollers. Is set to

  Although the hanging wheel 2 shown in the drawing has different radiuses of the concave arcs of the rolling surfaces 5a and 6a of the main roller and the sub-roller, the rolling surfaces of both rollers may have the same radius. Even if the main roller and the sub-roller have the same arc radius, the electric wire passing space 9 approximate to a circle can be created between the three rollers.

  The frame 7 includes a gate-shaped upper frame portion 7a that supports the main roller 5, a lower frame portion 7b that supports two sub-rollers 6, an auxiliary frame 7c through which the support shaft 5b of the main roller 5 is inserted, The universal joint 7d fixed to the lower part of the lower frame part 7b is combined.

  The lower frame portion 7b has a structure in which two U-shaped frames are united by being inclined in opposite directions.

At the top of one end of the lower frame portion 7b, the lower end of one end of the upper frame portion 7a are hinged with connecting pins 10 _-1. Further, the upper portion of the other end of the lower frame portion 7b, the lower end of the auxiliary frame 7c is hinged with connecting pins _10-2. Each of the connection pins _{10-1 and 10-2} is a horizontally arranged pin that faces in a direction perpendicular to the axis of the main roller 5.

  A plate-shaped lock member 12 (see FIGS. 4 and 5) is attached to the auxiliary frame 7c using a connecting pin 11 parallel to the axis of the main roller 5. The hook portion at the lower end of the lock member 12 is engaged with a groove (not shown) formed on the outer periphery of the support shaft 5 b of the main roller 5.

  The lock member 12 is provided with a lock pin 13 with a knob inserted into a pin hole (not shown) provided in the auxiliary frame 7c. When the lock pin 13 is pulled out of the auxiliary frame 7c, the lock member 12 is locked. 12 can be rotated about the connecting pin 11 as a fulcrum.

Due to the rotation, the hook at the lower end of the lock member 12 comes off the groove on the outer periphery of the support shaft 5b. In this state, the auxiliary frame 7c can be rotated around the connecting pin _10-2 as a fulcrum as shown in FIG. 4 to release the engagement of the auxiliary frame 7c with the support shaft 5b of the main roller.

When the auxiliary frame 7c is retracted from the point of engagement with the support shaft 5b, the upper frame portion 7a can be opened with the connection pin _10-1 as a fulcrum, and the electric wires can be taken in and out of the electric wire passing space 9 from the side. After the electric wires are inserted into the electric wire passing space 9, the upper frame portion 7a is closed in the reverse procedure.

  When there is a gap between the rolling surfaces of the main roller 5 and the sub-roller 6, the auxiliary piece 8 catches the electric wire passed through the electric wire drawing space 9 or hits the edge of the main roller or the sub-roller. It is provided for the purpose of eliminating such concerns.

  Depending on the size of the main roller 5 and the sub-roller 6 and the setting of the inclination angle of the axis of the sub-roller, the gap between the rolling surfaces of these rollers may not be so large. In such a case, the auxiliary piece 8 is unnecessary.

The connecting member 3 connects three links _3-1 , _3-2 , _3-3 having different lengths to the longest link _3-1 , the middle length link _3-2 , and the shortest link. which was Ren'nara in the order of link 3 _-3 (connecting link) is used.
Link _{3 -1 3 -2 3 -2 3 -3,} respectively connecting pins ₁₄ -1, and is hinged with a _{14 -2.}

The link _{3 -1,} the universal joint 7d hanging gold car 2 of one link _{3 -3,} the other hanging gold car 2 universal joints 7d, respectively connecting pin ₁₄ -3, _{14 -4} using Hinged.

The connecting pin ₁₄ -1 _{to 14 -4,} the connecting pin ₁₀ -1, a parallel pin and _10-2, each link ₃ -1 _{to 3 -3,} a connecting pin used to connect each link It can rotate around a fulcrum.

A stopper 4 is provided on the universal joint 7d. Links that are individually hinged to two hanging gold car universal joint 7d 3 _-1, 3 _-3, the connection from the connection angle θ1 between the universal joint 7d by the stopper 4, .theta.2 is minimized position The rotation in the direction in which the angle is further reduced is restricted.

The position where the connection angles θ1 and θ2 of the link with the universal joint are minimized is the position shown in FIG. 1, that is, the position where the two hanging wheels 2 are attached to the electric wires W1 and W2 to be replaced. . In this position, the link 3 _-1 3 _-2, link 3 _-2 and 3 _-3 also mutual connection angle .theta.3, .theta.4 is minimized, turning each link to further connect angle decreasing direction therefrom Is stopped by a stopper 4 provided at the connection portion.

  The restriction of the change of the connection angle of each link by the stopper is such that one of the hanging wheels is inverted by 180 ° from the initial position and the position where the electric wire on the side to be replaced is supported (the connection angles θ3 and θ4 are almost 180 °). Position).

  By setting the stopper 15 so that the rotation of the connecting member 3 in the direction in which the connection angle of each link is increased from the chain line position in FIG. 1 where the connecting member 3 linearly extends is suppressed, one of the hanging wheels is inverted. It is possible to enhance the effect of suppressing the lateral swing of the connecting member 3 due to the wind when the connecting member 3 is suspended.

  Reference numeral 16 in FIG. 1 denotes a mounting hole for attaching the clasp 17. A large number of reversing type hanging wheel devices 1 are mounted on the transmission line to be repositioned at appropriate intervals in the longitudinal direction of the electric wire.

  The large number of reversing type hanging wheel devices 1 are connected to each other by using a connecting rope (not shown), and attachment to the overhead transmission line at a predetermined interval and recovery after the electric wire is replaced are pulled by pulling the connecting rope. .

  A fastener 17 is attached to the connecting rope at a predetermined interval, and by attaching the fastener 17 to the mounting hole 16, the attachment interval of the reversing type hanging wheel device to the electric wire is also maintained by the connecting rope. You.

  In the reversing type lifter device 1 configured as described above, a number of bridges covering the entire span of the overhead power transmission line are connected by connecting ropes, and each of the reversal type lifter devices 1 The suspension wheels 2, 2 connected by the connecting members are individually suspended and attached to the conductor overhead transmission lines.

  Next, wires are respectively connected to the two electric wires (old wires) W1 and W2 to be replaced using a cam-along (not shown), and the wires are retained by a steel tower.

  After that, the connection of one of the electric wires, for example, the tower W2 to the insulator connecting device is released, the retaining by the wire connected to the electric wire W2 is loosened, and the position of the electric wire W2 is lowered.

At this time, one of the links constituting the linking member 3 of the inverting type suspension gold vehicle device, for example, _3-1, FIG. 1 and the fulcrum of the connecting pin 14 _-3, is rotated in the arrow A direction in FIG. 2 Permissible. Thereby, as shown in FIG. 2, the electric wire W2 hangs down without expanding in the direction away from the electric wire W1.

  In the process, the hanging wheel 2 on the side that passed the electric wire W2 is inverted, and is supported by the inverted hanging wheel, and as shown by a chain line in FIG. 1, the electric wire W2 is directly below the electric wire W1 that becomes a supporting bus. Hanging.

  Then, a new wire is connected to one end of the electric wire W2, and the electric wire W2 is pulled out from the other end side. Then, the new wire replaced with the electric wire W2 is fixed to the steel tower by applying a predetermined tension, and the electric wire W1 previously used as the supporting bus is replaced by using the new wire as a supporting bus in the same procedure as described above.

When the position of the electric wire W1 is lowered by loosening the retaining by the wire, the links _3-2 and _3-3 rotate in a direction not restricted by the stopper. As a result, the electric wire W1 also hangs in a state where bulging in a direction away from the electric wire W2 is suppressed.

  As described above, by using the reversing type hanging wheel device of the present invention, an existing overhead electric wire can be replaced without approaching a nearby transmission line, and the existing transmission line is not replaced in a situation where a live line is nearby. Even if it is not obtained, the work can proceed safely.

  The main roller 5 and the sub-roller 6 of the hanger wheel used in the illustrated reversing type hanger wheel device 1 are both made of resin, so that the weight of the device can be reduced. The roller 6 may be a metal roller.

Connection angle θ3 of the link ₃ -1 _{to 3 -3,} albeit at also preferred element stopper 15 which defines the maximum value of .theta.4, omitted may be.

REFERENCE SIGNS LIST 1 reversing suspension wheel device 2 suspension wheel 3 connecting member _3-1 to _3-3 link 4 stopper 5 main roller 5 a rolling surface 5 b support shaft 6 auxiliary roller 6 a rolling surface 7 frame 7 a upper frame portion 7 b lower frame part 7c auxiliary frame 7d universal joint 8 auxiliary piece 9 wire pull through space ₁₀ -1, _{10 -2} connecting pins 11 and 14 connecting pin 12 locking member 13 locking pin 15 stopper 16 fasteners mounting holes 17 fasteners 21 hanging gold car 22 connecting member ₂₂ -1, _{22 -2} arm 23 hinge portions 24 clevis W1, W2 wire θ1~θ4 connection angle

Claims (4)

An inversion type suspension wheel device for an overhead power transmission line refilling method in which two suspension wheels (2, 2) are connected via a connection member (3),
Each of the hanging wheels (2) is composed of a main roller (5) supported by two electric wires (W1, W2) to be replaced, and two sub-rollers (6, smaller in size than the main roller). 6) and a frame (7) for supporting these rollers. The main roller (5) is located at the bottom of an inverted isosceles triangle, and the two sub-rollers (6) are located on the inverted 2 Placed on each of the other two sides of the equilateral triangle,
The connecting member (3) includes a connecting link in which three or more links having different lengths are sequentially hinged and the two hanging wheels (2, 2) are attached to the electric wires (W1, W2). A connection angle formed by the adjacent links at the position where the connection angle is minimized, and a stopper (4) for preventing the link from rotating from the minimum angle of the connection angle in a direction of decreasing the connection angle of each link. The link at one end of the connecting member (3) is connected to the universal joint (7d) below the one suspension wheel (2), and the link at the other end is connected to the lower universal joint (7) of the other suspension wheel (2). 7d) The reversing type lifting wheel device rotatably connected to the main roller (5) using connecting pins ( _14-3 , _14-4 ) arranged in a horizontal direction in a direction perpendicular to the axis of the main roller (5). . The three links ( _3-1 to _3-3 ), each having a different length, are linked to the longest link ( _3-1 ), the intermediate length link ( _3-2 ), and the shortest link ( _3-2 ). inverting type suspension gold vehicle according to claim 1 which constitutes the connecting member (3) by a connecting link which has Ren'nara in the order of _-3).   The main roller (5) and the sub-roller (6) of the hanging wheel (2) each have a concave arcuate rolling surface (5a, 6a), and the main roller and the sub-roller are supported by the frame (7). 3. The reversing type swing wheel device according to claim 1 or 2, wherein a wire drawing space (9) approximate to a circle is formed between the rollers in the set state.   A gap is present between the rolling surfaces (5a, 6a) of the main roller (5) and the sub-roller (6), and an auxiliary piece (8) for filling the gap is arranged in the gap. The reversing type hanging wheel device according to claim 3.

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