JP4109142B2 - Installation method and installation stand for air end - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for installing an air end portion and an installation stand that are particularly suitable for use in a moving substation equipment or the like.
[0002]
[Prior art]
When conducting power countermeasures and trouble recovery work in the summer when power demand is increasing dramatically, or when adding power facilities that are normally used, multiple 154kV class mobile air terminal units are moved to the substation premises. In some cases, they are each assembled on a box-type installation base, installed at a predetermined location, and connected to a power transmission line or the like.
In the case of air terminations used for substation equipment for transportation of 66 kV or less, the built-in insulator pipe is not so long or heavy, so the air terminations are transported by a medium truck with a loading weight of about 4 tons. However, it is possible to perform on-site installation using a crane attached to the truck.
[0003]
[Problems to be solved by the invention]
However, when it comes to the air end of the 154kV class or higher, the insulator tube is generally made of ceramic and has a length of 3 to 5m, and the weight is considerably heavy at over 300kg. In order to perform site installation using the crane, it takes a lot of time and labor in consideration of work safety. Therefore, when installing a plurality of 154kV-class air terminations, each air termination is carried on a large trailer and carried to the installation site. It is conceivable to perform a large-scale work of lifting up using a worker and installing it through a gantry.
[0004]
There are some air terminations that have a reduced length and weight by switching the ceramic tube from ceramic to rubber material. However, these air terminations have low mechanical strength. It is necessary to be very careful when handling after mounting on a box-type installation stand. Also, when installing on-site, for example, a lead wire is attached to the top of the center conductor at the end of the air. When connecting, the ladder cannot be stood against the end of the air, so it is necessary to take measures such as building a separate scaffold.
[0005]
Also, in order to improve the installation workability, a plug-in type is adopted for the cable connection of the air end part that is performed in the installation stand, but because the plug-in type requires a length of cable pull back, Therefore, the height of the installation stand had to be increased. Further, when the cable is inserted into the upright air terminal, it is necessary to secure a certain amount of work space in order to allow the cable to meander and escape.
SUMMARY OF THE INVENTION An object of the present invention is to provide an installation method and an installation stand for an air end portion that can be transported and installed easily and in a short time without using a large facility.
[0006]
[Patent Document 1]
Japanese Patent Laid-Open No. 10-261331
[Means for Solving the Problems]
The present invention adopts the following configuration in order to solve the above points.
<Configuration 1>
A state in which a plug-in joint is provided at the lower end of the center conductor, and an air end portion covered with a gas pipe on the outer periphery is attached to a mounting base having a detachable auxiliary column that holds the side portion of the air end portion. The installation method of the air termination | terminus part characterized by installing in the following process.
a. a step of plug-in connecting a terminal of a cable to be terminated to the plug-in joint portion of the air termination portion in a state in which the air termination portion is in a lateral direction;
b. The step of raising the air end portion together with the installation base while curving the vicinity of the end of the cable to the side.
c. Connecting a lead wire to the upper end of the central conductor of the air termination portion.
d. Removing the auxiliary strut of the installation base.
[0008]
<Configuration 2>
An installation frame used in the method for installing an air termination unit according to Configuration 1, wherein the frame body is configured to be detachably fixed to the frame body on which the air termination unit is placed, and the air It consists of auxiliary struts that hold the side of the end part, and the cable connected to the air end part is inserted into the bottom part of the gantry body, and a passage that opens to the outer edge part of the bottom part is provided. An installation stand characterized by that.
[0009]
<Configuration 3>
The installation base according to Configuration 2, wherein the base body and the auxiliary column are made of aluminum or aluminum alloy.
[0010]
<Configuration 4>
The installation frame according to Configuration 2, wherein suspension hooks are respectively disposed at a bottom portion of the frame body and an intermediate portion and an upper portion of the auxiliary column.
[0011]
<Configuration 5>
The installation stand according to Configuration 4, wherein the suspension hook provided at an intermediate portion of the auxiliary column is positioned higher than the position of the center of gravity where the installation stand and the air termination portion are integrated.
[0012]
In such an air end portion installation method and installation stand, the air end portion insulator tube can be a polymer insulator tube mainly composed of silicone rubber.
More specifically, such an air end portion and an installation stand are installed according to the following procedure.
1. A protective cover is detachably attached to the outermost periphery of the aerial end portion, and the aerial end portion fixed to the mounting base via the protective cover is placed on the loading platform of a crane-equipped transport vehicle. Transport to.
2. At the same site, the installation platform and the air end portion are hung by the crane of the transport vehicle and lowered from the loading platform.
3. A wire is attached to a suspension hook provided at an intermediate portion of the auxiliary column, and the air end portion and the installation stand are turned sideways while the wire is suspended by the crane of the transport vehicle.
4. In a state of being sideways, a separately prepared cable end is connected to the plug-in joint at the end of the air by plug-in.
5. Remove the protective cover, attach a wire to a suspension hook provided on the auxiliary column of the installation base, lift the installation base and the air end while lifting the wire with a crane of the carrier, and terminate the cable end Start up while curving the vicinity.
6. A lead wire is connected from the back side of the auxiliary column to the upper end of the center conductor of the air termination portion.
7. Remove the auxiliary column.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 is a side view showing an embodiment of the present invention, FIG. 2 is a rear view, and FIG. 3 is a bottom view.
[0014]
1 to 3, first, a description will be given of the installation base 11 on which the air end portion 10 is installed. FIGS. 1 and 2 show the appearance in which the protective cover 40 is put on the air end portion 10. The mounting base 11 is composed of a base body 12 formed into a hexahedron by a frame member, and an auxiliary support column 13 that is detachably installed on the top of the base body 12.
The auxiliary column 13 includes a main body 16 formed in a ladder shape by two vertical members 14 and four horizontal members 15 having the same length as that of the air end portion 10, and both sides that support the main body 16 from both side surfaces. It is composed of six auxiliary members 17 and is arranged along one side 18 on the top of the gantry body 12 (hereinafter, this one side is referred to as “side on the back side” for convenience of explanation) and is detachably fixed by bolting. Has been. Six auxiliary members 17 form a ramen structure to support the main body 16, but if the necessary mechanical strength is obtained, the number and the mounting position are not particular.
[0015]
Suspension hooks 20a, 20b, and 20c are disposed on the bottom of the gantry body 12 and the middle and upper portions of the auxiliary support column 13, respectively.
The suspension hook 20b provided in the intermediate part of the auxiliary column 13 is positioned higher than the position of the center of gravity where the installation base 11 and the air termination part 10 are integrated (this effect will be described later).
[0016]
As shown in FIG. 3, at the bottom of the gantry body 12, the two members 26 and 27 are spaced apart so as to open at the center of one side 24 on the front side (the side facing the side 18 on the back side). An exit passage 30 is provided which is arranged and fixed in place. As will be described later, the escape passage 30 is for shifting the cable 31 connected to the air end 10 from the bottom surface side of the gantry body 12 to the front surface side.
[0017]
FIG. 4 shows that the four fall prevention angles 33a, 33b, 33c, and 33d are arranged around the bottom of the gantry body 12 shown in FIG. A state where they are arranged so as not to cross each other and bolted is attached to the bottom part in a detachable manner. Each of the fall prevention angles 33a, 33b, 33c, and 33d is a member that has an L-shaped cross section such as angle steel and is longer than one side of the bottom of the gantry body 12.
[0018]
Next, the air termination part 10 will be described. The air terminal portion 10 is formed for movement, and includes a known plug-in joint 38 at the lower end of the center conductor 37 as shown in FIG. The outer periphery of 38 is covered with an insulating tube 39. The insulator tube 39 is a lightweight polymer insulator tube formed of silicone rubber and FRP (fiber reinforced plastic) or the like, and two kinds of annular corrugated protrusions 34 are formed alternately and vertically in the outer peripheral surface. ing. The plug-in joint 38 and the insulator tube 39 are fixed to a flange 35 for mounting on the gantry body 12. The upper end surface of the garment tube 39 is closed by a cap 36 having a known configuration.
[0019]
The air terminal portion 10 shown in FIG. 5 is erected on the top of the gantry body 12 with a removable protective cover 40 on the outermost periphery as shown in FIG. It is fixed through a book lever 41 or the like. The protective cover 40 is a cylindrical body divided into two along the length direction, and covers the outer peripheral surface of the polymer insulator tube 39 having a low mechanical strength described in FIG. 5 to protect it from external forces during transportation. Is.
[0020]
1 to 4, the gantry main body 12, auxiliary column 13, fall prevention angles 33 a, 33 b, 33 c, 33 d and protective cover 40 are made of aluminum or aluminum alloy for weight reduction. It may be composed of other light metals and synthetic resins with a minimum range supplementing the mechanical strength.
[0021]
Next, a method for installing the air end portion 10 via the installation stand 11 will be described.
First, as shown in FIGS. 1 and 2, the air end portion 10 provided with the polymer insulator tube 39 is fixed to the gantry body 12 by a conventional method, and the auxiliary strut 13 is provided via the protective cover 40, the pressing member 47, and the like. It is mounted on the loading platform of a crane-equipped transport vehicle and transported to the installation site.
As an example of a transport vehicle with a crane, a medium truck with a loading weight of about 4 tons and a crane that can be operated by a remote control can be used.
[0022]
At the installation site, a wire is attached to a suspension hook 20c provided on the uppermost portion of the auxiliary support column 13, and the installation base 11 and the air end portion 10 are lowered from the loading platform to predetermined positions while the wire is suspended by a crane of the transport vehicle.
[0023]
Next, as shown in FIG. 6 later, a wire 43 is attached to a suspension hook 20b provided in the intermediate portion of the auxiliary support column 13, and the air end portion 10 and the wire 43 are suspended by the crane hook 44 of the transport vehicle. The installation base 11 is turned sideways. The suspension hook 20b provided in the intermediate part of the auxiliary column 13 is higher than the position of the center of gravity where the installation base 11 and the air termination part 10 are integrated, so that when it is lifted, Since the side 45 is pivoted around the fulcrum, an effect of making the installation base 11 easy to turn sideways is obtained. At this point, the cable 31 in FIG. 6 is not yet attached, and the protective end 40 is covered with the air end portion 10. Further, the air end portion 10 and the installation base 11 can be loaded on the transport vehicle in a sideways state, and wires can be attached to the suspension hooks 20b and 20a, and can be lifted in the sideways state and lowered to the ground. .
[0024]
And the terminal of the cable 31 prepared separately is connected to the plug-in type joint part 38 of the air termination | terminus part 10 in the state of the side by a known plug-in system.
When the connection of the cable 31 to the air end portion 10 is completed, the terminal of the cable 31 is appropriately fixed by the cleat 46 shown in FIG. Next, after removing the protective cover 40, as shown in FIG. 6, a wire is attached to the suspension hook 20c provided on the upper part of the auxiliary support column 13, and the installation base 11 and the air end portion are suspended while the wire is suspended by the crane of the transport vehicle. 10 is lifted, and the vicinity of the end of the cable 31 is gradually bent up.
[0025]
At this time, since the cable 31 immediately after being connected to the plug-in joint portion 38 of the air end portion 10 is in a state of passing through the bottom surface of the gantry main body 12, It is made to pass through the provided escape passage 30. In this way, when the installation base 11 rises vertically while being suspended by a crane from a lateral state, the cable 31 passes through the front surface from the bottom surface side of the base body 12 along the passage 30 (the state shown in FIG. 1). ).
[0026]
Thus, by providing the passage 30 on one side of the bottom portion of the gantry body 12, when the cable 31 is connected to the air end portion 10, the vicinity of the cable terminal is straightened as much as possible and is performed quickly and accurately. In addition, there is no need to pull back the gantry body 12 when connecting the cables, so that the height of the gantry body 12 can be greatly reduced.
[0027]
When the installation base 11 and the air terminal portion 10 rise vertically, as shown in FIG. 7, four fall prevention angles 33a, 33b, 33c, 33d are arranged around the bottom of the base body 12, and bolt tightening is performed. Go and attach it to the bottom. As shown in FIG. 4, one fall prevention angle 33 c closes the opening of the escape passage 30.
[0028]
Next, a ladder is put on the back side of the auxiliary strut 13 and a lead wire is connected to the upper end of the center conductor of the air end portion 10, and finally the auxiliary strut 13 is attached using a crane of a transport vehicle as shown in FIG. Remove. At this time, since a ladder can be used, there is no need to separately assemble a scaffold or the like.
[0029]
As described above, according to the present invention, since the installation base and the air end portion 10 are reduced in weight, if there is one crane-equipped carriage for installing them, all operations are performed. This eliminates the need for large-scale work such as installing an air end on a gantry using a heavy machine such as a self-propelled crane vehicle. In the air end portion 10 using the polymer insulator pipe as described above, it is not possible to perform the work by directly applying the ladder to the air end portion from the point of strength. However, in the present invention, the ladder is applied to the auxiliary support column 13. There is no need to build a separate scaffold. When the cable is inserted into the air end portion 10, the air end portion 10 is lying sideways, so that the pulled-in cable 31 can be connected as it is, and is necessary for plug-in connection work. In addition, the area of the work space for meandering and escaping the excess cable length can be reduced.
Moreover, when removing the air termination | terminus part 10 and the installation mount frame 11, removal work can be simply performed using a transport vehicle with a crane similarly to installation.
[0030]
【The invention's effect】
As described above, according to the present invention, the end portion in the air having the plug-in joint portion at the lower end of the center conductor and covering the outer periphery with the insulator tube 39 is subjected to a predetermined process through the installation base having the detachable auxiliary column. By installing it, the installation work can be carried out and installed easily and in a short time without using a large-scale facility.
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of an air termination portion and a mounting base according to the present invention.
FIG. 2 is a rear view of the same embodiment.
FIG. 3 is a bottom view of the embodiment.
FIG. 4 is a bottom view showing the bottom of the installation base of the embodiment.
FIG. 5 is a cross-sectional view showing an embodiment of an air termination portion according to the present invention.
FIG. 6 is an explanatory diagram of a method for installing the air end portion and the installation stand according to the present invention.
FIG. 7 is an explanatory diagram of a method for installing an air end portion according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Air termination | terminus part 11 Mounting base 12 Base main body 13 Auxiliary support | pillar 14 Vertical member 15 Horizontal member 16 Main body 17 Auxiliary member 20a, 20b, 20c Hanging hook 30 Exit passage 31 Cable 33a, 33b, 33c, 33d Fall prevention angle 35 Flange 38 Plug-in joint 39 Insulating tube 40 Protective cover 43 Wire 44 Crane hook of transport vehicle

Claims (5)

A state in which a plug-in joint is provided at the lower end of the center conductor, and an air end portion covered with a gas pipe on the outer periphery is attached to a mounting base having a detachable auxiliary column that holds the side portion of the air end portion. The installation method of the air termination | terminus part characterized by installing in the following process.
a. plugging in a terminal of a cable to be terminated to the plug-in joint of the air termination portion in a state in which the air termination portion is in a lateral direction;
b. A step of raising the air end portion together with the installation base while curving the vicinity of the end of the cable to the side.
c. Connecting a lead wire to the upper end of the center conductor of the air termination portion;
d. Removing the auxiliary column of the installation base. An installation stand for use in the method of installing an air termination according to claim 1,
The gantry main body for placing the aerial terminal portion, and an auxiliary column that is detachably fixed to the upper portion of the gantry main body and holds the side portion of the air ending portion,
An installation frame, wherein a bottom passage of the frame body is provided with a passage through which the cable connected to the air end portion is inserted and opened at an outer edge of the bottom portion. In the installation stand of Claim 2,
The installation base, wherein the base body and the auxiliary column are made of aluminum or aluminum alloy. In the installation stand of Claim 2,
A mounting base, wherein suspension hooks are respectively disposed at a bottom part of the base body and an intermediate part and an upper part of the auxiliary column. In the installation stand of Claim 4,
A suspension stand provided at an intermediate portion of the auxiliary column is positioned higher than the position of the center of gravity where the installation stand and the air end portion are integrated.

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