JP3167203B2 - Main column replacement equipment for steel pipe steel tower - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for replacing a main pillar below a lower arm of a steel tower using a steel pipe.

[0002]

2. Description of the Related Art For example, in a steel tube tower for overhead power transmission lines, when a main pillar material below a lower arm is damaged and needs to be replaced, conventionally, an electric wire installed on the steel tower is replaced with a new one. After that, as shown in FIG. 4, as shown in FIG. 4, a method of tensioning this line by applying branch lines 5 and 6 to the main columns adjacent to the main column The method removes the stress applied to the replacement main column by lifting the column 2 with a truck crane or the like, and replaces the column with the new main column while supporting the upper part of the tower so as not to tilt.

[0003] In the case where the overhead electric wire is removed in advance below the lower arm, not only the weight of the steel tower but also the weight of the electric wire and insulators, the wind pressure load applied to the steel tower and the electric wire, the angular load of the line, and the like.
Since all stress is acting on the main pillar, it is difficult to respond to unexpected situations by supporting with a branch line or a truck crane. Therefore, it is preferable from the viewpoint of safety to make the tower light and proceed with replacement work by.

[0004] In addition, "Tower construction standard commentary book" (TLS-2 1991) P16 issued by the Transmission Line Construction Technology Research Group.
1. It is also possible to replace the main pillar by a method in which the entire tower above the replacement position is once lifted by using the apparatus for raising method shown on pages 178 to 183.

[0005]

In the conventional replacement method described above, in the case of an overhead power transmission tower, electric wires are removed, so that a power outage during work is unavoidable, and the tools, personnel, and time required for the work are extremely large. Become.

In the case of a steel pipe tower, if there is no gap of about 20 mm between the flange joints connecting the main pillars, it is difficult to replace the main pillars. As a result, the surrounding main pillars and abdominal material resist lifting, and an excessive force is required for lifting, and extra stress is generated in the surrounding members.

[0007] On the other hand, the construction method using the raising device has an advantage that the work can be carried out with the electric wire being wired, but it is a steel tower capable of stably supporting the track without an angle, and the carrying path of the device can be maintained on flat ground. While there is a steel tower in the place and the design of the equipment does not become difficult, it should be a steel tower using small angle iron or a relatively small steel pipe steel tower.In addition, the installation position of the equipment, the equipment under construction and the steel tower There are many conditions, such as the need to perform special designs such as strength and foundation reinforcement for each steel tower, so the range of use is narrow and lacks versatility.

[0008] Further, during the construction period, a power outage is required, and since there are many management items specific to the construction method, the construction is very difficult. In addition, the equipment is large and expensive, and it is difficult to transport it to the site. In addition, the number of workers increases, and the construction cost is high.

The conventional replacement method and the method using a raising device have a number of problems as described above. Therefore, an object of the present invention is to enable labor saving, labor saving, time reduction, cost reduction, and relaxation of implementation regulations.

[0010]

According to a first aspect of the present invention, there is provided a main column replacement device which comprises a pair of opposed base fittings fixed to sound main columns located above and below the replacement main column. A jack-up strut to be mounted between the pair of base brackets, a cylinder for pushing and pulling the strut in the longitudinal direction, and a facing to be fixed to upper and lower sound main pillars and to be attached to upper and lower connection portions of the replacement main pillar. A pair of slide exchange devices are provided, and the new main column is set in parallel with the replacement main column between the slide surfaces of the pair of slide exchange devices, and the cylinder is pushed out to hang on the replacement main column. After removing the stress, the new main pillar is slid by the slide exchanging device and replaced with the replacement main pillar.

The slide exchanging device may be either a device that pushes in the new main pillar and slides it, or a device that pulls in and slides it.

[0012]

This device is set on only one of the four legs of the tower. For this one leg, healthy main pillars above and below the replacement main pillar are connected by this device, and the stress applied to the replacement main pillar by the jack-up support is shouldered and the steel tower is replaced by four.
There is no difference with the leg support, and it is always stable even when working.

Further, since the replacement main column material and the new main column material are exchanged by using the slide exchanging device, the gap between the flange joints may be only a small amount that does not hinder the sliding of the main column material. No extra stress is generated. In addition, since at least one of the main pillars being replaced is always located between the upper and lower healthy main pillars and is able to support the upper part of the tower, unexpected situations such as a sudden increase in load, cylinder failure, etc. It is safe even if it occurs.

Therefore, in the case of an overhead power transmission tower, the work can be carried out without disconnecting the electric wires and without stopping the power transmission depending on the replacement place.

[0015] In addition, since the device itself is a facility only to cope with the stress applied to one leg, it is not so large or complicated. It is extremely small and simple as compared with the device for the raising method. Therefore, it is hard to be restricted by the loading due to the topography and the like, and it can be manufactured without difficulty for a large steel pipe tower of 500 KV class. Also, there is no need to reinforce the tower or foundation.

[0016]

FIG. 1 shows an embodiment of the present invention. As shown in the figure, the main column replacement device 10 includes a pair of opposed base fittings 11, 11, a pair of left and right jack-up supports 12, 12 for connecting these base fittings, and each of the supports is longitudinally extended. Hydraulic cylinders 13, 13 for pushing and pulling in the directions;
It consists of a pair of upper and lower slide exchanging devices 14, 14.

As shown in FIG. 2, the base metal fitting 11 is opened and closed with half rings 11b and 11c integral with the base plate 11a with the hinge portion 11d as a fulcrum. Hinged portions 11d and 18
The half ring is tightened with the clamp bolt 11e on the opposite side of 0 ° to hold the main pillar. A wedge 17 divided in the circumferential direction is press-fitted between each half ring 11b, 11c and the main pillar 2 (or 3). Although the stopper 19 is attached to increase the stationary stability of the base fitting 11, these elements may be provided as needed.

Jack-up support 12 and hydraulic cylinder 1
3 is bolted to a chain line region on the base plate 11a shown in FIG. The jack-up support 12 is formed by connecting several steel pipes with a flange joint, and can cope with a change in the length of the replacement main pillar 1 by replacing a steel pipe at an appropriate position with a steel pipe having a different length. it can. In addition,
The hydraulic cylinder 13 may be incorporated in the jack-up support 12 in the longitudinal direction.

The slide changing device 14 includes the base fitting 11
Similarly, the two members are fixed to the upper main column member 2 and the lower main column member 3 with facing each other. The fixing is performed as shown in FIG.
The main body of the exchange device is divided into two parts, 14a and 14b, and half-split rings 14c, 14d are provided at the butting portions of these divided members 14a, 14b which are fastened with bolts, and these rings are attached to the sound main column 2 (Or 3) in a way to hug you. The slide changing device 14 has a hydraulic cylinder 15 and a slide surface 14e for receiving a flange joint at the end of the main pillar. Some sliding surfaces 14e
Is formed on a movable plate 14f to facilitate the transfer of the new main column member 4 onto the main column member 3, and the height thereof can be finely adjusted by a level adjuster 16 which moves the plate up and down. I have.

Next, how to use the illustrated replacement device will be described.

As shown in FIG. 1, abdominal material (indicated by a dashed line) at a position where the work is obstructed is removed, and the space between the healthy main pillars 2 and 3 above and below the replacement main pillar 1 is removed. The base metal fitting 11, the jack-up support 12 and the hydraulic cylinder 13 are connected, and the upper and lower slide exchanging device 14 is also mounted at a predetermined position, and the new main column 4 is replaced between the sliding surfaces 14e of this device. Are set in parallel with each other and so that the surface positions of the lower flange joint are aligned. At this time, it is desirable that the new main column member 4 and the replacement main column member 1 be connected to each other by a parallel press fitting 20 that is attached to both main column members using a U-bolt or the like.

When the above preparations are completed, the fastening of the upper flange joint of the replacement main pillar 1 by bolts is released. After this,
When the left and right hydraulic cylinders 13, 13 are simultaneously operated and pushed out, a push-open force acts between the pair of base fittings 11, 11, and the upper sound main pillar 2 is lifted, and the upper part of the replacement main pillar 1 is lifted. A gap is created between the flange joints. As a result, the stress applied to the replacement main column member is eliminated, so that the fastening by the lower flange joint of the replacement main column member 1 is released (this is possible even before the stress is released). By operating the cylinders 15, 15, the new main pillar 4 set between the replacement devices is pushed into the position of the replacement main pillar 1 from the side by the cylinders 15, 15 while sliding on the slide surface 14 e.
At this time, the replacement main pillar 1 is also pushed by the new main pillar 4 and
4b, slides on the slide surface 14e to form the new main pillar 4
And the replacement main pillar 1 is replaced. Thus, the main pillar 1,
If the four joints 4 are arranged side by side and replaced while simultaneously sliding horizontally, the gap between the flange joints does not need to be increased. Also,
During the operation, there was always one of the main pillars 1 and 4 between the main pillars 2 and 3, which were insufficiently supported by the jack-up support 12 due to a sudden load change or the like. Occasionally, a load is received instead, so that a stable support at the top of the tower is also guaranteed.

In addition, the main pillars 1 and 4 are connected by the metal fitting 20,
The same replacement can be performed even when the replacement main pillar 1 is pulled out by a hydraulic cylinder, but from the viewpoint of simplification and miniaturization of the replacement device 14, the push-in method shown is more preferable. With this pushing method, the rod of the cylinder 15 may be simply pressed against the new main pillar 4 and the cylinder 1
5 also has a shorter stroke than the center-to-center distance between the main pillars 1 and 4 and can be used in time. Once the extruded rod is pulled in, the gap between the rod tip and the new main pillar 4 is filled with a spacer, and the operation of extruding again is repeated, so that the cylinder can be pushed more than the stroke by a short stroke cylinder.

In addition, the illustrated apparatus has two jack-up struts 12 in consideration of the balance of force and handleability, but the number of the struts may be one as long as the strut is strong.

[0025]

As described above, the main column replacement device of the present invention receives the load by shouldering the jack-up support connecting the upper and lower sound main columns, and in this state, the slide replacement device. As a result, the new main column material and the replacement main column material are slid laterally so that they are exchanged, so the replacement gap created between the flange joints at the ends of the main column material is extremely small, and the surrounding members Since unnecessary stress is not generated, stress prediction during work is facilitated. In addition, the backing effect of the support of the upper part of the tower by the main pillar material being replaced can be obtained,
In the case of power transmission towers, even if the installed electric wires are not removed, and depending on the replacement place, there is no power outage,
It is possible to safely perform the replacement work even on a tower with an angled track.

Further, it is not necessary to reinforce the tower and the foundation.

Further, since the apparatus itself has a structure corresponding to only one leg of a steel tower, and is simple, small, and light in time, restrictions on design and restrictions on loading into the site are removed.
The labor required for handling and the manufacturing cost are reduced.

Therefore, if the apparatus of the present invention is used, labor and labor of the work can be saved, time can be reduced, cost can be reduced, and the enforcement regulations can be almost eliminated.

The number of personnel required for the work is 16 to 20 persons / day in the case of the conventional method of removing the electric wire, and about 12 to 16 persons / day in the case of the method using the raising device. Can be handled by 6 people / day. As can be seen, the replacement of the main pillars using the apparatus of the present invention is not limited to the transmission tower, but particularly when the transmission tower is targeted, labor saving, labor saving, and cost reduction are required. The effect of reduction becomes remarkable.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a replacement device of the present invention in a simplified and used state.

2A is a front view of a base metal fitting, and FIG. 2B is a plan view of the base metal fitting.

3A is a front view of the slide exchanging device, FIG. 3B is a plan view of the slide exchanging device, FIG. 3C is an enlarged cross-sectional view taken along line XX of FIG. Enlarged sectional view of the YY line portion of FIG.

4A is a side view showing an example of a conventional replacement method, and FIG. 4B is a plan view showing the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Replacement main pillar material 2 Upper healthy main pillar material 3 Lower healthy main pillar material 4 New main pillar material 5 and 6 Branch lines 10 Main pillar material replacement device 11 Base fitting 12 Jack up pillar 13 and 15 Hydraulic cylinder 14 Slide exchange device 16 Level adjuster 17 Wedge 18 Presser bracket 19 Stopper 20 Parallel presser bracket

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toru Hasegawa 3-3-22 Nakanoshima, Kita-ku, Osaka-shi Inside Kansai Electric Power Co., Inc. (72) Inventor Junichi Asano 3-11-20 Wakaoji, Amagasaki-shi Kansai Electric Power Stock (56) References JP-A-8-163729 (JP, A) JP-A-53-38698 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H02G 1 / 02 E04H 12/10

Claims (1)

(57) [Claims] 1. A pair of opposed base fittings fixed to sound main pillars located above and below a replacement main pillar, a jack-up support attached between the pair of base fittings, and the support pushed and pulled in the longitudinal direction. And a pair of opposed slide changers fixed to the upper and lower sound main pillars and attached to the upper and lower connections of the replacement main pillar, and a new slide changer is provided between the slide surfaces of the pair of slide changers. After setting the main column material in parallel with the replacement main column material, extruding the cylinder to remove the stress on the replacement main column material, slide the new main column material with the slide exchange device Main column replacement equipment for steel pipe towers to be replaced with pillars.