JPH0958972A - Lifting method for heavy article to polar crane in dome, andits lifting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow execution with a simple facility without using a large-scale crane device by providing a hoisting device fitted with a rotary support base at the upper end and allowing only vertical movement when a weight is hoisted to a polar crane installed in a cylindrical building, i.e., a dome. SOLUTION: A hoisting device K is installed on the floor surface 104a of a building H, the travel type winder 120 of a polar crane P is operated, a hoist section 2 stored in a rack section 1 is lifted, and its skirt is fixed to the rack section 1. A suspension work device J is carried into the building H, a winder 126 is operated to suspended a base frame which is part of the suspension work device J, and it is mounted on a rotary support base at the upper end of the hoist section 2 of the hoisting device K. The hydraulic cylinder of the hoist section 2 is operated, and the base frame of the suspension work device J is mounted on a beam material 110. The suspension work device J is assembled on the polar crane P, and materials such as a steam generator G are conveyed by the suspension work device J.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for lifting a heavy load on a polar crane installed in a cylindrical building, that is, a dome, and more particularly, in a storage dome in a nuclear power generation facility. The present invention relates to a lifting method for a polar crane which is installed in a storage dome and is used for carrying materials around a steam generator housed in the housing dome, and a lifting device used for carrying out the method.

[0002]

2. Description of the Related Art A steam generator is installed in a reactor housing building in a nuclear power generation facility in addition to a reactor. However, the steam generator is extremely heavy and durable. In updating and replacing the steam generator, the roof (dome) of the housing building is removed and the work is performed using a large crane. However, this method requires large-scale roof removal work, is very dangerous, is inefficient, requires manpower, and ends up being very expensive. It should be noted that the permanent polar crane has a small hoisting capability, and it is not possible to work with large heavy objects. Therefore, the present inventors tried to perform this work by temporarily installing an erection work vehicle on this polar crane.

[0003]

SUMMARY OF THE INVENTION In view of the above-mentioned circumstances, the present invention requires simple equipment for updating, replacing or transporting a steam generator or the like in a building of this kind without using a large-scale crane device. It is an object of the present invention to provide a method for lifting a large heavy object on a polar crane and a device therefor capable of reducing the working cost.

[0004]

The method and apparatus for lifting heavy objects on a polar crane in a dome according to the present invention have the following configurations to achieve the above object. The method of lifting a heavy load on a polar crane of the present invention is a heavy load for a polar crane installed in a cylindrical building and equipped with a traveling hoist that moves on a beam that rotates on a horizontal plane. In the operating range of the polar crane, a lifting device equipped with a rotary support at the upper end capable of only vertical movement is installed, and a heavy object is lifted by the existing polar crane. The heavy object is placed on the rotary support table of the lifting device by the winding operation and the moving operation of the existing polar crane, and then the lifting device is lifted to place the heavy object on the beam member of the polar crane. It is characterized by being placed. The levitation device of the present invention comprises a quadrangular prism body, a pedestal portion having a space vertically extending therethrough, an interposition member attached to opposite sides of the pedestal portion, and an extension extending in multiple stages. It has a member, the base part is fixed to the interposition member, and the upper part is made up of a sling upper part provided with a rotation support base. Further, the lifting device of the present invention has a quadrangular prism body, a pedestal portion having a space vertically extending therethrough, and an extension member extending in multiple stages, the base portions of which are opposite sides of the pedestal portion. It is characterized in that it is fixed to the upper part, and the upper part is equipped with a rotary support table.

(Operation) The lifting device is installed in the building, the lifting part of the lifting device is pulled up by the operation of the polar crane, and is fixed to the pedestal part through the interposition member. Then, similarly, a heavy object is lifted by a polar crane and placed on the rotation support base of the lifting device. Then, the extension member of the lifting device is extended to lift the heavy object onto the beam of the polar crane.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a method for lifting heavy objects and a lifting device for the same in a dome according to the present invention will be described with reference to the drawings. (Embodiment of Device) FIGS. 1 to 13 show an embodiment of the lifting device. That is, FIG. 1 shows the overall configuration of the present lifting device K, and FIGS. 2 to 13 show the respective partial configurations thereof.

As shown in FIG. 1, the lifting device K of this embodiment is a tower-shaped mount 1, and is housed in the mount 1 and is erected on the mount 1 in use. The upper part 2 and the interposition member 3 interposed between the gantry part 1 and the upper part 2. The upper part 2 also extends in multiple stages.

The detailed structure of each part will be described below. The gantry part 1 (see FIGS. 1 to 4) The gantry part 1 is composed of a base part 10 and a tower part 11, and a stay 12 connecting the base part 10 and the tower part 11 together.
including. (Base 10) The base 10 has an H-shaped steel material and a rectangular frame 1
4, and a pedestal 15 is pivotally attached to a corner portion of the square frame body 14 so as to be swingable in the horizontal direction. The square frame body 14 and the bottom surface of the overhanging base 15 are placed on the foundation. (Tower-shaped portion 11) In the tower-shaped portion 11, the tower body 17 having a rectangular column shape has column members 17A at four corners, a horizontal member 17B connecting the column members 17A,
The diagonal member 17C is formed into a truss structure. The lower end of the tower body 17 is pin-connected to the rectangular frame body 14 of the base 10.
And fall in the same direction as a whole. Pin holes 19 constituting a fixing structure described later are continuously formed in the pillar 17A. Inside the tower body 17, a rectangular column-shaped space without obstacles is formed, and the upper part 3 is housed in the space so as to be vertically movable. The tower body 17 can be self-supporting. (Stay 12) The stay 12 connects the base portion 10 and the tower-shaped portion 11 and prevents the tower-shaped portion 11 from collapsing. That is, the base 1
The bracket 21 is fixedly mounted on the overhanging base 15 of 0, and the bracket 22 is fixed on the outside of the corner portion of the column member 17A of the tower-shaped portion 11, and the stay 12 is held between the brackets 21 and 22 by a pin. Be combined. FIG. 4 shows only the stay 12 taken out. The stay 12 can be omitted if the tower body 17 can be sufficiently self-supporting.

The upper part 2 and the interposition member 3 (see FIGS. 1 and 5 to 1)
3) The upper part 2 is mainly composed of three extension columns 25 extending in a row, a skirt 26 fixed to the lower end of the extension column 25, a hydraulic cylinder 27 built in the extension column 25, and the extension. It is composed of each main part of a rotation support base 28 arranged on the upper part of the pillar 25.

(Fixing Structure) (FIGS. 5 to 8) The upper part 2 is fixed to the pedestal part 1 through the interposition member 3.
The skirt 26 and the interposition member 3 of the upper part 2 form a part of this fixing structure. The fixing structure will be described with reference to FIGS. 5 to 8. In the gantry unit 1, as described above, the tower-shaped unit 1
A pin hole 19 is opened in one pillar member 17A. Interposition member 3
In FIG. 3, pin holes 30 are formed at both ends corresponding to the pin holes 19. These pin hole 19 and pin hole 3
The interposition member 3 is fixed to the pedestal portion 1 by inserting the stopper pin 31 into the position 0. Skirt 26 in the upper part of Raku
Is composed of a skirt end plate 33, a connecting plate 34, and a bottom plate 35, and is fixed to the lower end of the extension column 25. That is, the skirt end plate 33, which is the main body of the skirt 26, is fixed in parallel to the lower end of the extension column 25 from the outer surface of the extension column 25 via the connecting plate 34. The distance between the outer surfaces of the skirt end plate 33 substantially matches the distance between the inner surfaces of the interposing members 3 that are arranged to face each other. The bottom plate 35 has an extension column 25 and a skirt 26.
The bottom of the is closed integrally. 36 is a rib for reinforcement. In this skirt 26, a pin hole 37 is formed in the skirt end plate 33 in the vertical direction. In this embodiment, two rows are opened while maintaining symmetry, but as long as the symmetry is maintained, one row or three rows may be used. On the other hand, in the interposition member 3, a pin hole 38 is opened corresponding to the pin hole 37, and a stopper pin 39 is inserted into the pin hole 37 and the pin hole 38, so that the upper portion 2 is skirted. It is fixed to the interposition member 3 via 26. As a result, the upper part 2 is fixed to the pedestal part 1 via the interposition member 3.
Although the fixing mode at the top of the gantry unit 1 is shown in the illustrated example, the present invention is not limited to this mode, and a mode in which the supporting unit 2 is fixed at the middle portion or the bottom of the supporting unit 1 can be adopted.

(Extension Column 25) (See FIGS. 9 to 11) The extension column 25 is composed of an outer cylinder 41, an intermediate cylinder 42 and an inner cylinder 43 which are doubly arranged in the outer cylinder 41. 9 to 1
Reference numeral 1 shows the elongated column 25 taken out. In the present embodiment, the outer cylinder 41, the intermediate cylinder 42, and the inner cylinder 43 are all quadrangular cylinders, but may be polygonal cylinders or cylinders. The bottom of the outer cylinder 41 is the bottom plate 35 of the skirt 26.
Fixed on top. Further, a flange 41a protruding outward is formed on the upper edge portion thereof. The intermediate cylinder 42 is slidably inserted into the outer cylinder 41 via a spacer, and the lower surface of the upper flange 42a contacts the upper surface of the flange 41a of the outer cylinder 41. The inner cylinder 43 is slidably inserted into the middle cylinder 42 via a spacer, and the upper flange 43a is formed in the middle cylinder 42.
Abuts on the upper surface of the flange 42a. Stoppers are arranged between the outer cylinder 41 and the middle cylinder 42 and between the middle cylinder 42 and the inner cylinder to prevent them from being pulled out.

(Hydraulic Cylinder 27) (FIG. 12) The hydraulic cylinder 27 is housed in the extension column 25, its lower end is fixed to the bottom plate 35, and its upper end is fixed to the lower surface of the flange 43a of the inner cylinder 43. FIG. 12 shows the hydraulic cylinder 27 taken out and shown. The hydraulic cylinder 27 also has a structure that extends in three stages, and includes an outer cylinder 45, an intermediate cylinder 46, and an inner cylinder 47.
Reference numeral 48 is an inlet for hydraulic oil, and 49 is its outlet.

(Rotary Support Base 28) (FIG. 13) The rotary support base 28 is fixedly installed on the upper part of the extension column 25, more specifically, on the flange 43a of the inner cylinder 43 of the extension column 25. FIG. 13 shows a detailed structure of the rotary support base 28. That is, the rotation support base 28 is provided with the flange 4 of the inner cylinder 43.
An annular fixing base 51 which is fixed so that its center coincides with 3a.
A rotary wheel 53 which is externally mounted on the fixed base 51 via a bearing 52 and has a large gear 53a formed on the outer periphery thereof; a table 54 mounted and fixed on the rotary wheel 53; and a flange 43a of the inner cylinder 43. And a rotation drive device 55 having a small gear (worm) 55a meshing with the large gear 53a of the rotary wheel 53. By the rotation drive of the rotation drive device 55, the large gear 53a is rotated by meshing with the small gear 55a, and the table 54 is freely rotated. The rotary drive device 55 may be electric or hydraulic.

In this lifting device K, a contracted lifting part 2 is accommodated in a space within a tower-shaped mount part 1. In use,
The interposition member 3 is installed on the tower-shaped mount 1 with the stop pin 31. The upper part 2 is pulled out upward and fixed by the skirt part 26, the interposition member 3 and the stop pin 39. The state of FIG. 1 shows this state. In the storage, the interposition member 3 is installed at the lowermost stage of the tower frame 1.

(Embodiment of Method) The method of lifting a heavy object on a polar crane in a dome according to the present invention is carried out by using a lifting device K of Jojo. FIG. 14 and FIG. 15 show, as one embodiment thereof, application to a polar crane in a storage dome that stores a steam generator of a nuclear power generation facility. In the figure, H is a housing dome (building), G is a steam generator, P
Is a polar crane.

The building H is constructed in a cylindrical shell structure having a frame structure made of shielding concrete. 100
Is a skeleton thereof, and a hemispherical dome-shaped roof (not shown) is formed on the upper part thereof. 102 is the building H
It is a guide rail for polar cranes formed on the inner wall of. 104 is a floor, and 104a is the floor surface.
Although the guide rail 102 is integrated with the skeleton portion 100 in the illustrated example, it may be formed on the upper surface of the cylindrical wall body constructed in the building.

The polar crane P is equipped with wheel portions 112 running on the guide rails 102 at both ends of a beam member 110 radially extended, and guides the beam member 110 on the beam member 110. A traveling hoist 120 that can travel freely is arranged. More specifically, in the beam member 110, two beam elements 110a are placed relative to each other with a predetermined space b therebetween, and the wheel portion 112 is provided with a drive mechanism for the wheel 112a. The traveling type hoisting machine 120 includes a bogie section 122 having wheels 122 a and straddling the beam member 110, a winch 124 arranged on the bogie 122, and a hoisting machine 126 driven by the winch 124. The wheels 122a run on the beam 110. The hoist 126 moves the lifting hook 126b up and down via the chain block 126a.

In this embodiment, a method of lifting the erection work device J as a heavy object on the beam member 110 of the polar crane P will be described. This erection work device J is a so-called chain jack trolley, and as shown in FIGS. 16 to 18, an underframe 202 with wheels having wheels 200, is erected on the underframe 202 in a detachable manner, and extends in multiple stages.扛 Superior pillar 204, the beam 2 which is bridged over the 曛 Superior pillar 204
06, a chain jack 2 suspended from the beam 206
It consists of 08. The chain jack trolley J is used to suspend the steam generator G or the erection material (not shown) with the chain jack 208. More specifically, the underframe 202 with wheels is a vertical frame portion 202.
a and a horizontal frame portion 202b are formed into a square frame, and the wheel 20
0 is attached to the vertical frame portion 202a, and the polar crane P
It runs on the beam material 110. It should be noted that the underframe 202
In, the vertical frame portion 202a and the horizontal frame portion 202b are pin 2
It is connected via 10, and is transformed into a rhombus by a lateral force. That is, the underframe 202 is held in a quadrangle with the diagonal member 212 in a steady state, has a width B1, and is deformed by removing the diagonal member 212 to become a rhombus and has a width B2 (see FIG. 19).
The width B2 is the beam material 11 of the polar crane 110.
It is made smaller than the interval b of 0. Although the diagonal members 212 are arranged at the four corners in the illustrated example, they may be arranged at only one corner. Further, a hydraulic cylinder may be adopted as the diagonal member 212 so that it can be expanded and contracted. Substantial pillar 204 is its substrate 21
6 has a mounting bolt 218 that can be freely mounted on and removed from the underframe 202, and has a structure that extends in multiple stages. The bracing pillar 204 and the beam 206 are integrated.

The construction procedure will be described below. (1) The lifting device K is installed on the floor surface 104a of the building H. In the initial state of the lifting device K, the lifting part 2 is housed in the gantry part 1. That is, in the gantry unit 1, the base unit 10
The overhanging base 15 is expanded, the stay 12 is stretched between the tower-shaped portion 11 and the base portion 10, and the stay 12 is stably placed on the floor surface 104a. The interposition member 3 is installed on the upper part or the middle part of the gantry part 1. Traveling hoist 120 of polar crane P
The hoisting machine 126 is operated to pull up the upper part 2 stored in the pedestal part 1, and the skirt 26 is inserted into the interposing member 3.
Fixed to.

(2) The erection work device J is carried into the building H, the hoist 126 of the polar crane P is operated, and the underframe 202 which is a disassembled part of the erection work device J is lifted. It is placed on the rotation support base 28 of the lifting device K. The underframe 202 is in a folded state.

(3) The lifted upper portion 2 of the lifting device K, that is, the hydraulic cylinder 27 is operated to lift it, and the underframe 202 of the erection work device J is moved to the space (b) between the beam members 100 of the polar crane P. The beam 100 is passed and moved above the beam 100. Then, by utilizing the rotation of the rotation support base 28,
The underframe 202 is placed on the beam member 100.

(4) Returning to the process of (2) again, the polar crane P is operated to lift another part of the erection work device J,
This is placed on the lifting device K, and the beam 1
Place it on 00.

(5) The erection work device J is assembled on the polar crane P, and the erection work device J conveys the steam generator G or other materials.

(Effects of the Embodiment) As described above, according to the method for lifting a large heavy object on the polar crane in the dome of the present embodiment, by using the lifting device K, relatively simple equipment is provided. In addition, a large heavy load can be placed on the polar crane while using the existing polar crane. Therefore, a large-scale crane device is not required, the work can be rationalized, the efficiency can be improved, the work can be performed safely, and the work cost can be significantly reduced. Further, when the installation work on the beam member 110 of the polar crane P is completed by using the erection work device J in the present embodiment, the erection work device J performs the work of transporting the steam generator G. be able to. In addition, the lifting device K of the present embodiment has a simple structure, and its manufacturing cost is low.

In this embodiment, the erection work device J is described as a large heavy object, but the present invention is not limited to this. The present invention is not limited to the above embodiments, and various design changes can be made within the scope of the basic technical idea of the present invention. In the lifting device K, although the interposition member 3 is used, the skirt 26 of the lifting part 2 may be directly fixed to the pillar member 17A of the gantry 1.

[0026]

According to the lifting method for heavy objects of the present invention, at least a lifting device capable of only vertical movement is used, a relatively simple facility is used, and an existing polar crane is used. Heavy items can be placed on the polar crane. Therefore, a large-scale crane device is not required, the work can be rationalized, the efficiency can be improved, the work can be performed safely, and the work cost can be significantly reduced. Further, according to the lifting device of the present invention, the structure is simple, and when the storage device is housed, the space is not taken up by accommodating the lifting device in the pedestal part. The position can be freely selected and it is easy to use.

[Brief description of drawings]

FIG. 1 is a front configuration diagram showing an entire embodiment of a lifting device of the present invention.

FIG. 2 is a front view of a tower portion of the present apparatus.

FIG. 3 is a plan view of FIG. 2;

FIG. 4 is a partial view of a tower portion.

FIG. 5 is an enlarged front view of the fixing structure portion (a view in the direction V in FIG. 6).

6 is a view on arrow VI in FIG.

FIG. 7 is an exploded configuration diagram of a fixing structure portion.

FIG. 8 is an enlarged view of part VIII of FIG.

FIG. 9 is a front view of an extension column.

FIG. 10 is a side view of the extension column.

FIG. 11 is an enlarged view of a partial cross section of the extension column.

FIG. 12 is a configuration diagram of a hydraulic cylinder.

FIG. 13 is a configuration diagram of a rotation support base.

FIG. 14 is a layout view of the polar crane inside the accommodation dome (cross-sectional view taken along line XIV-XIV in FIG. 15).

15 is an XV direction arrow view of FIG.

FIG. 16 is a side view of the chain jack trolley (of FIG. 17).
(XVI direction arrow view).

FIG. 17 is a front view thereof (a view on arrow XVII in FIG. 16).

FIG. 18 is a sectional view taken along line XIIX-XIIX in FIGS.

FIG. 19 is a view showing a deformed state of the underframe of the chain jack trolley.

[Explanation of symbols]

K ... lifting device, P ... polar crane, H ... building, 1 ... frame part, 2 ... upper part, 3 ... interposer member, 25 ... extension member, 2
8 ... Rotating support, 110 ... Beam, 110a ... Beam element, 1
20 ... Traveling hoist,

Claims (4)

[Claims] 1. A method for lifting a heavy load to a polar crane, which is installed in a cylindrical building and is equipped with a traveling hoist that moves on a beam that rotates on a horizontal plane, comprising: Within the working range of the polar crane, a lifting device equipped with a rotary support at the upper end and capable of only vertical movement is installed, and a heavy object is hoisted by the existing polar crane, and the hoisting and moving operations of the existing polar crane. The heavy object is placed on the rotation support base of the lifting device, and then the lifting device is lifted, and the heavy object is placed on the beam member of the polar crane. How to raise things. 2. The beam members of a polar crane maintain a predetermined distance.
The method for lifting a heavy object according to claim 1, wherein the method comprises a plurality of beam elements, and the heavy object has a width that passes through a space between the two beam elements. 3. A pedestal portion having a space that vertically penetrates in the inside of a quadrangular prism body, an interposition member attached to opposite sides of the pedestal portion, and an extension member extending in multiple stages. The base is fixed to the interposition member, and the upper part is provided with a rotary support table, and the upper part is provided with the upper part. 4. A quadrangular prism body having a pedestal portion having a space vertically extending therethrough, and an extension member extending in multiple stages, the base portion being fixed to opposite sides of the pedestal portion, An uplifting device, characterized in that it comprises an upright part provided with a rotation support table on its upper part.