JP2004140918A - Line transfer auxiliary device and line transfer method for transmission line - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a line transfer auxiliary device for a transmission line and a line transfer method therewith capable of realizing safe and short-term work by preventing horizontal and vertical failure variances of the line in a line transfer work. <P>SOLUTION: This line transfer auxiliary device comprises a connection cord of which one end has a retaining part for retaining the transmission line, a connection cord retracting part with a locking device which retracts a connection cord of a prescribed length so as to be extendable and locks the extension of a connection cord when an impact force is applied in the extension direction of the connection cord; and a connection rope for connecting the connection cord retaining parts with each other using two connection cord extension sets consisting of the connection cord and the connection cord restraining part. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a power transmission line transfer auxiliary device and a transfer method for transferring a power transmission line from a span to a span while preventing abnormal fluctuations in the horizontal and vertical directions of the transmission line.
[0002]
[Prior art]
In recent years, the construction area has become more urbanized, and it has become difficult to acquire a site for a protective scaffolding that protects crossing workpieces. It has become mainstream (for example, refer nonpatent literature 1).
[0003]
In the “Suspension Metal Method”, the suspension car is connected with a connecting rope at an interval of 20 to 30 m, the upper metal wheel of the suspension car is hung on the existing wire, and the messenger rope is hung on the lower metal wheel. Towing with a running machine, a hanging wheel is placed between the spans. Replace the messenger rope with a thicker rope one by one and replace it with the required strength. A new electric wire is attached to one end of the wire, and the other end is pulled and drawn.
[0004]
The “hanging method” is performed in this way, but since the sag does not fall, it is applied to places where there are many obstacles under the line and it is difficult to install a scaffold.
[0005]
On the other hand, in the transfer work for transferring the transmission line from the steel tower to the steel tower, a “slide method” is used as a corresponding method (for example, see Patent Document 1).
[0006]
The “slide method” is an improved version of the transfer method for transferring the overhead wire from the existing steel tower to the new steel tower so that it can be performed safely, reliably and easily even if the operator is not an expert. The main wire is stretched between the existing steel tower to be transferred and the new steel tower, and the overhead wire is supported by a support pulley provided on a gold wheel movable along the parent wire, and in this state, the new steel tower is installed from the existing steel tower. By moving the gold wheel to the point, the overhead wire is pulled and moved.
[0007]
[Patent Document 1]
JP 11-205928 A ("Summary")
[Non-Patent Document 1]
Power Line Construction Technology Study Group, “Overhead Line Construction Standards Manual”, Denki Shoin, February 10, 1998, p. 222-224
[0008]
[Problems to be solved by the invention]
As described above, the “hanging method” in the method of extending an overhead power transmission line is a safe and efficient construction process, but in the method of transferring an overhead power transmission line, There was no method comparable to the "hanging method". In addition, the “slide method”, which is a method for transferring overhead power transmission lines, has a problem in that it is limited by the situation at the construction site.
[0009]
That is, the existing steel tower and the new steel tower are in a symmetrical position with respect to the line connecting the steel towers at both ends of the steel towers, and the wires stretched between the steel towers are connected to the steel towers at both ends of the steel towers. There is no problem if it is perpendicular to the connecting line, but the existing tower and the new tower are located asymmetrically with respect to the line connecting the towers at both ends of the tower, and are stretched between the towers. A problem arises when the wires to be crossed obliquely with the lines connecting the steel towers at the ends of those towers.
[0010]
For example, in the case of crossing, the area of the overhead line pulled by the gold wheel is widened, so there is a possibility that a straight sleeve is included in the area. The sleeve could not pass the gold wheel. In case of crossing, the load of the wire stretched between the towers may be excessive, and the strength of the towers that support this may be insufficient. As a result, the adoption of the “slide method” was limited.
[0011]
In this way, a construction method that can be implemented safely without any restrictions on adoption, regardless of the situation at the site, as safe as the “hanging method” in the above-mentioned wire drawing method, and shortening the construction. There was a problem that had to be developed.
[0012]
Accordingly, the present invention proposes a transmission line transfer auxiliary device and a transfer line construction method using the same, which can shorten the process while maintaining safety, and can be constructed without being affected by the situation at the site. With the goal.
[0013]
[Means for Solving the Problems]
In order to solve such an object, a transmission line shift assisting device according to claim 1,
A connection cord equipped with a holding part to hold the power transmission line at one end and a connection cord of a predetermined length can be stored so that it can be extended, and when an impact force is applied in the extension direction of the connection cord A connection cord storage portion having a lock mechanism for locking the extension of the connection cord, and a connecting rope for connecting the connection cord storage portions by using two sets of connection cord expansion / contraction sets composed of the connection cord and the connection cord storage portion. It is characterized by.
[0014]
Thereby, the length of the connection cord that mutually supports the plurality of power transmission lines to be transferred becomes freely expandable and contractable within a predetermined length range. That is, when the distance between the two lines is separated and the connection cord is extended from the cord storage portion, the extension occurs, and when the distance between the two wires approaches and the connection cord is wound around the cord storage portion , Shrinkage occurs. When stretched, it is possible to prevent fluctuations exceeding the length of the predetermined attached cord, and when shrunk, it is possible to prevent drooping due to slack of the connected cord. .
[0015]
When impact force is applied in the extension direction of the connection cord, the connection cord storage part is equipped with a lock mechanism that locks the extension of the connection cord. By changing the moving speed and applying an impact force to the transfer assisting device, the locking mechanism of the connecting cord storage portion can be operated to stop the extension of the connecting cord from the connecting cord storage portion. Therefore, the contact between the power transmission line being transferred and the nearby power transmission line is avoided, and the occurrence of damage to both can be prevented. Furthermore, even when the nearby electric wire is a high-voltage electric wire being charged, these approaches are avoided and the occurrence of a serious accident can be prevented.
[0016]
According to a second aspect of the present invention, there is provided a power transmission line shift assisting device according to the first aspect, wherein when the impact force is applied in the extending direction of the connecting cord, the shock force is attenuated. A shock absorbing mechanism is further provided.
[0017]
As a result, when an impact force is applied in the extending direction of the connecting cord, the impact force can be attenuated, thereby preventing mechanical damage to the transfer assist device due to the impact force. .
[0018]
According to a third aspect of the present invention, there is provided a power transmission line transfer method, wherein the power transmission line transfer auxiliary device according to claim 1 or 2 is installed between the plurality of power transmission lines spanned between the first diameters. Arranging a step, a gold wheel supporting a plurality of power transmission lines to which a transfer auxiliary device is attached, and a temporarily fixed rope for positioning the gold wheel, and transferring the plurality of power transmission lines to the first span Temporarily fixed within the range of the length of the auxiliary transfer device attached between the plurality of power transmission lines and the step of temporarily fixing the second movable span to be movable. And a step of transferring a plurality of transmission lines from the first span to the second span by sequentially repeating a loose line of the transmission line and a temporary tight line of the other transmission line.
[0019]
As a result, for railways and national roads, in addition to setting the conventional protective scaffolding, by using this transfer method, the wire being transferred within the predetermined length of the connection cord of the transfer assist device Can be prevented from drooping or falling. Therefore, double protection can be achieved for the construction area. When the lower wire and the nearby charging unit are abnormally approached, the locking mechanism of the transfer assisting device can be operated to further protect the access. The operation of the lock mechanism is started, for example, when the work supervisor changes the moving speed of the power transmission line during the transfer and gives an impact force to the transfer auxiliary device.
[0020]
Moreover, since the connection cord of the wire transfer auxiliary device between electric wires is always wound up by the connection cord storage part, the droop does not occur. Thus, this invention can solve all the matters which were the problem in the safety side of the conventional transfer method.
[0021]
That is, double protection can be achieved for railways and national roads, protection against abnormal access to the charging unit, prevention of drooping of the connecting cord between the electric wires, and prevention of drooping of the lower electric wires can be achieved.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EMBODIMENTS Embodiments of a power transmission line transfer assist device and a transfer method according to the present invention will be described with reference to the drawings.
As a first embodiment, a power transmission line shift assist device (hereinafter referred to as a looper device) of the present invention will be described.
As shown in FIG. 1A, the looper device 1 includes a connection cord 3 having a holding portion 2 (for example, a universal metal wheel) for holding a power transmission line at one end, and a connection cord 3 for a predetermined length. A connecting cord storage portion 4 having a lock mechanism (not shown) that locks the extension of the connection cord 3 when the extension is accommodated so as to be extended and an impact force is applied in the extending direction of the connection cord 3; 3 and a connecting cord 5 that connects the connecting cord storage portions 4 using two sets of connecting cord expansion / contraction sets each including the connecting cord storage portion 4.
[0023]
In the looper device 1, the length of the connection cord 3 can be expanded and contracted within a predetermined length range. In other words, when the connection cord 3 is extended from the cord storage portion 4 and extended, it is possible to prevent a variation more than the length of the predetermined attached cord 3 from occurring. Further, when the connection cord 3 is wound around the cord storage portion 4 and contracted, the connection cord 3 can be prevented from protruding.
[0024]
In addition, when an impact force is applied in the extending direction of the connection cord 3, the connection cord storage portion 4 includes a lock mechanism (not shown) that locks the extension of the connection cord 3.
[0025]
As shown in FIG. 1B, the looper device 1 further includes an impact absorbing mechanism 6 that attenuates the impact force when an impact force is applied in the extending direction of the connection cord 3. Can be attenuated.
[0026]
As a second embodiment, a construction procedure of a transmission line transfer method (hereinafter referred to as a looper method) of the present invention will be described. The looper method is a transfer method in which the two transmission lines to be transferred are moved while the distance between them is expanded and contracted like a scale insect (looper).
[0027]
First, as shown to Fig.2 (a), the transfer auxiliary | assistant apparatus 1 called the looper apparatus 1 which connected the connection rope 8 between the two strips of the transmission line 7a, 7b to transfer is arrange | positioned. Among the looper devices 1, a looper device 1a disposed closest to the transfer wheel 9a and 9b is provided with an impact absorbing mechanism 6. The reason for this is that the transfer is controlled by the transfer gold wheels 9a and 9b, so that the impact force that operates the lock mechanism 4 in the connection cord storage 5 is mainly via the transfer gold wheels 9a and 9b. This is to protect the looper device 1a, which is added to the moving gold wheels 9a and 9b and is closest to the moving gold wheels 9a, 9b, because it receives the greatest impact force.
[0028]
Next, when the power transmission line to be transferred is a multiconductor, the looper device 1 is disposed between the two strips 7a and 7b of the power transmission line to be transferred when the spacer supporting the multiconductor is removed. In the case where the power transmission line is a single conductor, an appropriate two strips are selected, and the looper device 1 is arranged while maintaining the initial interval between the two strips.
[0029]
Next, transfer is performed by shifting the two transmission lines into one set and shifting each transmission line sequentially like a bug. As shown in FIG. 2 (b), while supporting one power transmission line 7a by the looper device 1 attached to the other power transmission line 7b, the transfer wheel 9a, 9b is operated to move, and the power transmission line The space | interval of 7a and the power transmission line 7b is expanded. At this time, the transmission line 7a moves within the range of the connection cord length, and the non-moving transmission line 7b serves as a support line, so that the moving transmission line is prevented from dropping or swinging and abnormally approaching the charging unit. The If the length of the connecting cord is too long, there is a possibility that it will come into contact with the crossing workpiece under the line. However, since the looper device 1 has a built-in locking mechanism by impact force, even in such a case, abnormal approach will occur. Can be prevented.
[0030]
Thereafter, as shown in FIG. 2 (c), the transfer wheel 9a, 9b is operated while the power transmission line 7b is supported by the looper device 1 attached to the previous power transmission line 7a, and the initial interval is returned. Move up. Also at this time, the transmission line 7b moves within the range of the connection cord length of the looper device 1, and the non-moving transmission line 7a serves as a support line. Access is prevented.
[0031]
In this way, by repeating the movement like a scale insect, the two transmission lines are transferred. Thereafter, the looper device is removed after completion of all operations such as transfer and tight line.
When the electric wire is a single conductor, it is possible to transfer the three phases and three strips at once.
[0032]
3A shows a side view, and FIG. 3B shows a plan view.
In both FIGS. 3A and 3B, (a) shows the situation at the start of the transfer. At this time, a looper device is attached between the three phases C1, C2 and C2, C3 at a predetermined interval, and the transfer wire wheels 101, 102, 103 and the transfer wire wheels 111, 112, 113 is attached.
(B) in the same figure shows a state in which C1 and C3 in the three phases are fixed, and C1 is transferred using the transfer wire feeding wheel 101 and the transfer wire pulling wheel 111.
(C) in the figure shows a state in which C1 and C3 in the three phases are fixed and C2 is transferred using the transfer wire feeding wheel 102 and the transfer wire pulling wheel 112.
(D) in the figure shows a state where C1 and C2 in the three phases are fixed and C3 is transferred using the transfer wire wheel 103 and the transfer wire wheel 113 for transfer. When this is finished, the three phases all end the first step of the transfer, and further repeat the second step and after until the transfer is completed.
[0033]
The looper method that is such a wire transfer method can obtain the following advantages by using a looper device that is a transfer assist device.
[0034]
First, the looper device accommodates a predetermined length of the connection cord, and can reliably support the electric wire within the range of the length of the connection cord and lock the extension of the connection cord by impact force. It is possible to respond quickly to abnormal wire drooping and horizontal movement at the time of transfer and tight connection.
[0035]
Secondly, the looper device attached between the power transmission lines can be moved in the range of the connecting cord in both the horizontal direction and the vertical direction, so that the degree of freedom of movement is large and the construction is easy.
[0036]
Thirdly, the looper device is lightweight (1.6 kg / set) and can be installed simultaneously when the multiconductor spacer is removed. In addition, since the work can be performed while being installed from the work of removing the electric wire from the insulator series to the end of the tight-line work, it is possible to shorten the repetition of the steps of attaching and removing the looper device.
[0037]
Fourthly, since the looper device can be tightened while being installed because of its light weight, it can quickly respond to abnormal drooping at the time of tightening.
[0038]
As the third embodiment, a specific example relating to the wire transfer method of the present invention will be described.
[0039]
In the present embodiment, as shown in FIG. 4, the transmission lines a and b between the two diameters spanned on the steel towers A, B, and C are transferred from the steel tower B to the new steel tower D.
[0040]
FIG. 4 shows the preparation of the transfer of the transmission lines a and b and the status of the transfer between the steel towers B and C.
First, the four conductor wire spacers between the steel towers A, B, and C are removed. When removing the spacers, the looper device 1 is arranged between the inner and outer lines of the upper and lower lines as a facility for preventing the drooping of the phase electric wires and the abnormal charging section between the steel towers A, B and C. Two underlined lines are omitted. Displacement feeding wheels 10a and 10b are arranged on the steel tower B and temporarily fixed.
[0041]
Next, the transfer-drawing attracting wheels 11a and 11b from the steel tower D are arranged on the steel tower BC side, and flow from the steel tower D to the shortest position. The transmission lines a and b are moved to the 2L side arm attachment point of the tower D by exchanging the transfer trucks 11a and 11b to / from the transmission line a and b from the tower C side. The wire-drawing attracting wheels 11a and 11b are temporarily fixed. This transfer is a simultaneous two-wire transfer of the upper layer of the four conductor wires by the looper method. Hang a gold wheel on the two transmission lines, pull the wire connected to the gold wheel with a winch on the ground, and if one wire a moves 2m, move the other wire b using it as a branch line, The line transfer is repeated until it moves 30m.
[0042]
FIG. 5 shows the state of transfer on the steel tower AB side.
First, the electric wires a and b are taken in on the steel tower C side, while the looper method is being carried out, the wire transfer wheels 10a and 10b are transferred from the steel tower B, and the electric wires a and b are transferred. At this time, it will be carried out while confirming the distance from the national road and railway. In the state where the electric wires a and b are moved to the vicinity of the 2L side arm attachment point of the tower D, the feeding from the tower B is stopped and temporarily fixed.
[0043]
FIG. 6 shows the state of the tight connection of the transfer wire. The transmission lines a and b between the steel towers A and D and between the steel towers D and C are attached from the 2L side of the steel tower D to the 1L side insulator station. Thereafter, the steel wires D and C are connected to the transferred wires a and b. When the tight line is finished, the looper device 1 is removed.
In the same way, transfer / tightening will be carried out for the middle and lower phases using the looper method.
[0044]
The above has described the case of a double conductor in which a combination of two transmission lines can be easily obtained. However, in the case of a single conductor, the wires may be stretched and combined. Further, two combinations may be selected from a plurality of entire lines.
[0045]
As described above, for railways and national roads, in addition to setting the conventional protective scaffolding, using this transfer method, within the range of the predetermined length of the connection cord of this transfer assist device. Since it is possible to prevent the electric wire from being dropped or dropped during transfer, double protection can be achieved. When the lower wire and the nearby charging unit are abnormally approached, the operator can operate the lock mechanism of the transfer assist device to further protect the access. Since the connection cord of the transfer auxiliary device between the wires is always wound up by the connection cord storage portion, the droop does not occur. Thus, this invention can solve all the matters which were the problem in the safety side of the conventional transfer method.
[0046]
In other words, double protection can be achieved for railways and national roads, protection against abnormal access to live parts, prevention of drooping of the connection cord between the wires, and prevention of drooping of the lower wires can be achieved. Similar to the “hanging method” in the conventional wire drawing method, it is possible to provide a transfer method that is safe and shortens the construction process.
[0047]
【The invention's effect】
A wire transfer auxiliary device that has a function of winding the connection cord and locking when there is an abnormality is placed between the multiple wires to be transferred, and another wire that does not move is used as a support wire while moving one wire. It is possible to prevent abnormal fluctuations in the horizontal direction and the vertical direction of the electric wires in the wire work. Thereby, the transfer method which is safe and shortened the construction process can be provided.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a looper device. (A) is a basic block diagram, (b) is with a shock absorber.
FIG. 2 is a conceptual diagram of a looper method. (A) is an initial stationary diagram, (b) is a one-line movement diagram, and (c) is another-line movement diagram.
FIG. 3 is a conceptual diagram of three-phase batch transfer. (A) is a horizontal direction transfer diagram, (b) is a vertical direction transfer diagram.
FIG. 4 is a diagram showing a transmission line transfer preparation and a transmission line transfer state between steel towers B and C;
FIG. 5 is a diagram showing a transfer state of a transmission line between steel towers A and B.
FIG. 6 is a diagram showing a tight connection state of a transmission line after a transfer.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1, 1a ... Transmission line transfer auxiliary device, 2 ... Holding part (universal metal wheel), 3 ... Connection cord, 4 ... Connection cord storage part, 5 ... Connection cord, 6 ... Shock absorber, 7a, 7b ... Transmission line, 8 ... Connecting rope, 9a, 9b ... Money for transfer 10a, 10b, 101,102,103 ... Transfer Sending wheel for wire, 11a, 11b, 111, 112, 113 ... Pulling wheel for transfer, a, b, c1, c2, c3 ... Transmission line

Claims (3)

A connection cord provided at one end with a holding portion for holding the transmission line;
A connecting cord storage portion that stores the connecting cord of a predetermined length in an extendable manner and has a lock mechanism that locks the extension of the connecting cord when an impact force is applied in the extending direction of the connecting cord. When,
A transmission line transfer assisting device, comprising: a connecting rope for connecting the connecting cord storage portions using two sets of connecting cord expansion / contraction sets comprising the connecting cord and the connecting cord storage portion. The transmission line transfer assist device according to claim 1, further comprising an impact absorbing mechanism that attenuates the impact force when an impact force is applied in the extending direction of the connection cord. A step of installing the transmission line shift assisting device according to claim 1 or 2 between the plurality of transmission lines spanned between the first diameters;
A gold wheel supporting a plurality of power transmission lines to which the transfer auxiliary device is attached and a temporarily fixed rope for positioning the gold wheel are arranged, and the plurality of power transmission lines should be transferred to the first span. A temporary fixing step so as to be movable between the second spans;
Within the range of the length of the transmission line shift auxiliary device attached between the plurality of transmission lines, the temporarily fixed loose line of one transmission line and the temporary tightening line of the other transmission line A step of transferring the plurality of power transmission lines from the first span to the second span by sequentially repeating the steps.

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