JPH07315752A - Compound balance and heavy object carrying in method using compound balance - Google Patents

Abstract

PURPOSE:To provide a compound balance and a heavy object carrying in method using the compound balance, eliminating a large scaled jack up frame structure and a roller drawing device or a turn table device and the like for carrying in a large sized heavy object, and capable of shortening an installation construction process of the large sized heavy object. CONSTITUTION:A method comprises overhead cranes 16, 17 set up in a ceiling of a building to be movable in a prescribed direction, main balance 1 with both ends fixedly supported to these overhead cranes 16, 17, connecting bar 3 fixed so as to be suspended in an almost central position of this main balance 1, intermediate balance 4 rotatably supported to the center of this connecting bar 3 and a subbalance 7 supported respectively to both ends of this intermediate balance 4 to suspend an objective heavy object which must be carried into the building. Further, a tilt absorbing means (pin 2, radial bearing, thrust bearing), absorbing a tilt of the intemediate balance 4 due to an unbalanced load, is provided in the connecting bar 3 of the main balance 1 and the intermediate balance 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for loading and installing a large heavy object in a building such as a power plant, and is most suitable for lifting, moving and rotating work in a narrow space. Composite balance and a method for carrying in heavy loads using the composite balance.

[0002]

2. Description of the Related Art Conventionally, in a thermal power plant, a nuclear power plant or the like, various hoisting machines and hoisting mechanisms have been employed for loading and installing large heavy objects such as generators into a plant building.
In making that selection, we will consider and adopt the most suitable method depending on the plant layout, equipment installation floor height, access conditions around the building, construction process, etc.

In a recent large-scale power plant, for example, the weight of a generator is 300 to 450 tons per unit,
Various types of hoisting machines and hoisting mechanisms used to carry them in are becoming larger and larger, which is the most important point in construction planning.

This will be described below with reference to FIGS. 5, 6, 7, and 8. 5 and 6 are a plan view and a front view of the building for explaining the first example of the conventional carrying-in method, in which 20 is a jack-up frame, 2
1 is a turntable, 22 and 23 are rails, 24 is a suspended load such as a generator, 25 is a large object loading opening, 26 is a center pole jack, 27 is a base, 28 is a special vehicle, 30
Is the plant building.

Here, a case where the generator 24 is carried in through a large object carrying-in opening 25 provided in a part of the plant building 30 will be described with reference to FIGS. 5 and 6. First, the jack-up frame 20 for hoisting the generator 24 is assembled in the large-size carry-in opening 25, and the generator 24 loaded on the special vehicle 28 is inserted into the jack-up frame 20. Then, the generator 24 fixed on the foundation 28 by the jack-up frame 20 is jacked up to a position higher than the foundation stand 27, and the rails 22 are laid on the beams of the jack-up frame 20 and the floor of the building 30 and on the turntable 21. , Pull over the turntable 21 and rotate it 90 degrees on the turntable 21, and then on the beam on the floor of the building 30 and the generator 2.
The rail 23 stretched over the base table 27 of No. 4 is pulled out by a roller and placed at a predetermined position.

On the other hand, of the jack-up frame 20 installed in the large-size carry-in opening 25, only the upper part is cut off and installed again on the base 27 on which the generator 24 is installed, and the generator 24 is slightly jacked up. Then, the roller pulling device such as a rail is removed, and the device is installed on the base 27.

7 and 8 are a plan view of a building and a front view of the building for explaining a second example of a conventional carrying-in method (an example in which the jack-up frame 20 can be installed outdoors). In the figure, 20 is a jack-up frame, 24 is a suspended load such as a generator, 25 is a large object loading opening, 27 is a base, 28
Is a special vehicle, and 30 is a plant building.

7 and 8 show the case where the jack-up frame 20 can be installed outdoors. In this case, a large temporary opening is formed in the wall of the plant building 30 and a special vehicle is brought up to the vicinity of the temporary opening. A rail 23 that conveys the generator 24 by means of 28, and the generator 24 loaded on this special vehicle 28 is hung by the jack-up frame 20 on the beam of the floor of the building 30 and on the foundation 27 of the generator 24. Pull the top,
Place it in place.

As a third example of the carrying-in method other than the above-mentioned, when a large crane can be used outdoors, a frame without a jack-up device is provided and the generator is directly hung on the frame. There is a way.

[0010]

The conventional method described above has the following problems. That is, the first
In addition, in the second example, the jack-up frame 20 is required to carry in the generator.

Further, the second example has an effect that the rotating work by the turntable 21 performed in the first example can be omitted by forming a large temporary opening in the wall of the building 30, but it is possible to carry in the generator. It is often necessary later to close the opening formed in the wall of the building 30 by restoration work.

Further, a jack-up frame 2 for lifting a large heavy object weighing 300 to 450 tons.
Zero requires a large foundation and a period of assembly and disassembly. Also, due to the special conditions of the plant, the jack-up frame 20 cannot be installed in the large-sized object carry-in opening or adjacent to the wall of the building 30 due to the plant layout, or the frame 20.
In some cases, the assembly period of can not be secured in the process.

In addition, the frame 20 is placed in the large-size carrying-in opening.
By setting up, the large object carry-in opening cannot be used until the carrying-in of the generator 24 is finished and the removal of the frame 20 is finished, which may hinder the carrying-in of the base material for other works.

In the third example described above, the generator 24
Jack up frame 20 to suspend the
It was necessary to separate the upper part of the building and re-install it on the foundation, which could be a factor in prolonging the generator loading and installation work.

Therefore, the present invention does not require a large-scale jack-up frame, a roller pulling device, a turntable device, or the like for carrying in a large heavy object, and a compound balance and a composite balance capable of shortening the installation work process of a large heavy object An object is to provide a method for carrying in heavy goods using a balance.

[0016]

In order to achieve the above object, the invention according to claim 1 is an overhead crane installed on a ceiling of a building and movable in a predetermined direction, and both ends of the overhead crane are fixed and supported. The main balance, a connecting rod fixed so as to hang down at a substantially central position of the main balance, an intermediate balance rotatably supported around the connecting rod, and supported at both ends of the intermediate balance. A composite balance having a subbalance for suspending a target heavy object to be carried into the building.

In order to achieve the above-mentioned object, the invention according to claim 2 is a ceiling crane installed on a ceiling of a building and movable in a predetermined direction, and a main balance whose both ends are fixedly supported by the ceiling crane. A connecting rod fixed so as to hang substantially at the central position of the main balance, an intermediate balance rotatably supported around the connecting rod, and both ends of the intermediate balance are supported and carried into the building. It is a composite balance in which a sub-balance for suspending a target heavy object to be suspended and a connecting rod for connecting the main balance and the intermediate balance with a tilt absorbing means for absorbing the tilt of the intermediate balance due to an unbalanced load.

In order to achieve the above object, the invention according to claim 3 provides the compound balance according to claim 2, wherein the upper end portion of the connecting rod connecting the main balance and the intermediate balance is opposed to the main balance. A tilt absorbing means is constructed by rotatably supporting a pin fixed through the wall, and rotatably supporting a lower end portion of the connecting rod on the intermediate balance via a radial bearing and a thrust bearing. It is a compound balance.

In order to achieve the above-mentioned object, the invention according to claim 4 is such that at least two heavenly cranes movable in the X, Y and Z directions are installed on the ceiling of the building in advance, and the whole heavenly crane is installed. The main balance is fixed with a crane, the connecting rod is fixed so as to hang down on the main balance, the intermediate balance is rotatably supported around the connecting rod, and the target heavy object is hung at each end of the intermediate balance. A composite balance that supports a sub-balance is configured, and after the target weight is carried into the building through the opening formed in the building wall, the target weight is hung on the sub-balance, and the target weight is suspended by the overhead crane. After moving the object above the planned installation position, rotate the intermediate balance to align the installation direction of the target heavy object, and then place the object at the planned installation position, and also the target heavy object is installed. Fixed in position A heavy loading method for.

[0020]

According to the inventions corresponding to claim 1, claim 2 and claim 4, it is not necessary to assemble and dismantle the jack-up frame, and the rotation work using a turntable or the like is not required. , It is possible to shorten the construction period of the installation work, which is advantageous for the construction work. According to the invention corresponding to claim 3, even when an unbalanced load is applied to the connecting rod when the unbalanced load is tilted due to an unbalanced load of the suspended load, the unbalanced balance can be smoothly rotated.

[0021]

EXAMPLES Examples of the composite balance of the present invention will be described below.
This will be described with reference to FIGS. FIG. 1 is a front sectional view showing an embodiment thereof, and FIGS. 2 and 3 are a side view and a plan view showing the embodiment. This is a schematic main balance 1, intermediate balance 4, subbalance 7, and overhead cranes 16, 1.
7, the main balance 1 is supported and fixed to the overhead cranes 16 and 17, the intermediate balance 4 is rotatably supported on the main balance 1, and the intermediate balance 4 has a sub-balance 7 for suspending a target heavy object.
Is fixed. Specifically, the pin 2 is incorporated into the main balance 1 substantially in the center thereof so as to penetrate the wall surface of the main balance 1, and the through hole formed on the upper end side of the connecting rod 3 is inserted into the pin 2. As a result, the connecting rod 3 is rotatably attached, and the radial bearing 13 is attached to the outer periphery of the lower end side of the connecting rod 3.
a, 13b and a thrust bearing 14 are provided, and the intermediate balance 4 is rotatably supported by these bearings 13a, 13b, 14. A nut 6 is provided at the lower end of the connecting rod 3, and the thrust bearing 14 is fixed thereby. Connecting the intermediate balance 4 to the main balance 1 and at the same time connecting rod 3
The bearing 5 allows the intermediate balance 4 to rotate.

On the other hand, sub-balances 7 are attached to both ends of the intermediate balance 4, and shackle hardware 8 and equalize sheave 9 are attached to both ends of each sub-balance 7, and the trunnion attached to the suspended load. It has a structure in which it is suspended by 12 and the endless wire 11.

As shown in FIG. 1, the main balance 1 is a bridge girder-shaped frame, and reinforcing ribs 15 are formed in a grid pattern on the inner surface of the frame, and the intermediate balance 4 is also a main balance 1. Is configured similarly to.

Then, both ends of the main balance 1 in the longitudinal direction are
They are arranged and fixed to the ceiling of the building at a distance from each other, and are supported and fixed to ceiling cranes 16 and 17 having hooks 18 and 19 by bolts 31 or the like. Overhead crane 1
Reference numerals 6 and 17 are supported by the ceiling of the building and are movable in the X, Y, and Z directions.

FIG. 4 shows the main balance 1 and the intermediate balance 4 described above.
It is sectional drawing which shows the detail of the connection part of. In the intermediate balance 4,
The radial bearing 13a is attached to the upper part, and the radial bearing 13b and the thrust bearing 14 are attached to the lower part. The load of the suspended load is received by the thrust bearing 14 and
It has a structure that allows the intermediate balance 4 to rotate smoothly even if an unbalanced load of the suspended load is applied.

Next, a method for carrying in a heavy load using the composite balance constructed as described above will be described. Now, a plant building 30 shown in FIG. 5 as a building, which is constructed as shown in FIGS. 1 to 4 on an overhead crane 16 or 17 supported in advance on the ceiling so as to be movable in X, Y, and Z directions. The case where the balance is in a suspended state will be described. However, the generator 10 is inserted into the large object loading opening 25 of FIG. 5 by some method.
Carrying in is the same as before. After that, the overhead cranes 16 and 17 are manually moved to be positioned above the large object loading opening 25, and the endless wires 11 provided on the front, rear, left, and right subbalances 7 are hooked on the trunnions 12 of the generator 10, respectively. 16 and 17 are moved manually and stopped at a position above the broken line (installation position) of the base 27. After that, the intermediate balance 4 is manually rotated, and while the generator 10 is thereby aligned with the installation position indicated by the broken line, the wires of the overhead cranes 16 and 17 are lowered to align the generator 10 with the broken line of the base 27. The generator 10 is fixed by anchor bolts (not shown) that are embedded and fixed in advance.

By doing so, the method of carrying in heavy goods is completed. According to the method described above, the conventional method shown in FIG.
It is not necessary to assemble the jack-up mechanism 20 shown in FIG. 6 in advance, and the rotary table 21 is used to generate the generator 24.
It is not necessary to perform a rotating work to bring the device into a predetermined direction, the period for carrying in and installing the generator is significantly shortened, and further, the disassembly of the jack-up mechanism 20 is unnecessary, which is advantageous in the construction work.

Moreover, the pin 2 fixed to the main balance 1
One end of the connecting rod 3 is rotatably supported at the other end, and the radial bearings 13a and 13b and the thrust bearing 1 are provided at the other end of the connecting rod 3.
Since the intermediate balance 4 is supported via the unit 4, it is possible to absorb the inclination of the intermediate balance 4 due to the unbalanced load of the heavy object. The lower radial bearing 13b of the embodiment described above is
It can be omitted if the load to be carried in, for example, the load of the generator is small.

[0029]

According to the present invention, a large-scale jack-up frame, a roller pulling device, a turntable device, or the like is not required for carrying in a large heavy object, and the installation work process of a large heavy object can be shortened. It is possible to provide a method for carrying in heavy goods using a balance and a composite balance.

[Brief description of drawings]

FIG. 1 is a front sectional view of a first embodiment of a composite balance according to the present invention.

FIG. 2 is a side view of the first embodiment of the composite balance according to the present invention.

FIG. 3 is a plan view of the first embodiment of the composite balance according to the present invention.

FIG. 4 is a sectional view showing details of a connecting portion between the main balance and the intermediate balance shown in FIGS.

FIG. 5 is a plan view of a building for explaining a first example of loading a large heavy object into a conventional plant building.

FIG. 6 is a front view of a building for explaining a first example of loading a large heavy object into a conventional plant building.

FIG. 7 is a plan view of a building for explaining a second example of loading a large heavy object into the conventional plant building.

FIG. 8 is a front view of a building for explaining a second example of loading a large heavy object into the conventional plant building.

[Explanation of symbols]

1 ... Main balance, 2 ... Pin, 3 ... Connecting rod, 4 ... Intermediate balance, 5
... Bearing, 6 ... Nut, 7 ... Secondary balance, 8 ... Shackle hardware, 9 ... Equalize sheave, 10 ... Generator, 11 ... Endless wire, 12 ... Trunnion, 13a, 13b ... Radial bearing, 14 ... Thrust bearing.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Hideo Watanabe 1-1-1, Shibaura, Minato-ku, Tokyo Inside Toshiba Headquarters office (72) Inventor Kiyomi Matsuda 1-1-1, Shibaura, Minato-ku, Tokyo Stocks Company Toshiba headquarters office (72) Inventor Eisaku Kurose 3-7-1, Nishishimbashi, Minato-ku, Tokyo Toshiba Plant Construction Co., Ltd. (72) Inventor Kunihiko Okada Benten Dori 6, Naka-ku, Yokohama-shi, Kanagawa 85-chome Utoku Transport Co., Ltd.

Claims (4)

[Claims] 1. A ceiling crane which is installed on a ceiling of a building and is movable in a predetermined direction, a main balance whose both ends are fixedly supported by the ceiling crane, and a main crane which is fixed so as to hang substantially at a central position of the main balance. A connecting rod, an intermediate balance rotatably supported around the connecting rod, and an auxiliary balance that is supported at both ends of the intermediate balance and suspends a target heavy object to be carried into the building. A compound balance characterized by the following. 2. A ceiling crane which is installed on the ceiling of a building and is movable in a predetermined direction, a main balance whose both ends are fixedly supported by this crane, and which is fixed so as to hang substantially at a central position of this main balance. Connecting rod, an intermediate balance rotatably supported around the connecting rod, a sub-balance that is supported at both ends of the intermediate balance and suspends a target heavy object to be carried into the building, and the main balance. A compound balance, wherein a connecting rod between the balance and the intermediate balance is provided with a tilt absorbing means for absorbing a tilt of the intermediate balance due to an unbalanced load. 3. The composite balance according to claim 2, wherein an upper end portion of a connecting rod that connects the main balance and the intermediate balance is rotatably supported by a pin fixed to an opposite wall of the main balance. A compound balance, wherein a lower end portion of the connecting rod is rotatably supported by the intermediate balance via a radial bearing and a thrust bearing to constitute an inclination absorbing means. 4. In advance, at least two ceiling cranes that can move in the X, Y and Z directions are installed on the ceiling of the building, the main balance is fixed by the whole crane, and the crane is suspended from the main balance. The connecting balance is fixed as shown in the figure, and the intermediate balance is rotatably supported around this connecting bar. After being carried into the building from the opening formed in the building wall, the target heavy object is hung on the sub-balance, and the target heavy object is moved above the planned installation position by the overhead crane, and then the A method for carrying in a heavy load, comprising rotating the intermediate balance to align the installation direction of the target heavy object, placing the target heavy object at the scheduled installation position, and fixing the target heavy object at the scheduled installation position.