JP2794378B2 - Transport system for large heavy objects such as steam generators in nuclear power plants, apparatus and method therefor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

A. Objects of the Invention (1) Field of the Invention The present invention relates to a transport system for carrying out a large vertically elongated heavy object installed in a building, or carrying in and installing it outside a building. The present invention relates to a transport system for removing or newly introducing a steam generator housed in a housing dome in a nuclear power plant, and a method and apparatus thereof.

(2) Conventional technology In addition to a nuclear reactor, a steam generator is installed in a nuclear reactor building in a nuclear power generation facility. The steam generator is extremely heavy and has a long service life. In renewal and replacement of the steam generator, the roof (dome) of the housing building is removed and the work is performed using a large crane. However, according to this method, it is necessary to remove a large roof, and the work of suspending a large crane requires a large lift because the steam generator is vertically long, and it is easy to vibrate, and there is a great danger. However, it is inefficient, labor intensive and ultimately costly.

(3) Problems to be Solved by the Invention In view of the above circumstances, the present invention seeks to streamline and improve the efficiency of updating and replacing steam generators in this kind of building,
An object of the present invention is to provide a system for carrying in and out a large heavy object such as a steam generator, which can be constructed safely and can reduce the operation cost.

B. Configuration of the Invention (1) Means for Solving the Problems The transport system and the transport method for a large heavy object according to the present invention employ the following configurations to achieve the above object. The first main configuration of the present invention relates to a transport system, which comprises a rotary transport section and a linear transport section, and (i) the rotary transport section is a column serving as a center of rotation, and rotates around the column. A rotating gantry crane body traveling with traveling wheels, and a hoisting device supported by the gantry crane body to lift and lift heavy objects. A traveling path laid on an extension of the above, the heavy object is placed in a sideways state and travels on the traveling path, at least one of which supports the lower end of the heavy object and follows the tilt of the heavy object. It is characterized by comprising a vertical feed portion comprising a traveling vehicle having a tilt fixing portion, and a horizontal portion for intercepting a heavy object on the traveling vehicle and lifting and lifting the heavy object. The second main configuration of the present invention also relates to a transport system and utilizes a rotating crane in a building.
In place of the column serving as the center of rotation, the center of rotation of the body of the rotating gantry crane is mounted on a rotating crane in the building. A third main configuration of the present invention relates to a transfer method, in which a large heavy object is lifted from its installation position by a rotating gantry crane that rotates around a rotation center of a column or a rotating crane, and is moved to a predetermined position by rotating. With the lifting of the heavy objects,
Supporting the lower end of the large heavy object, and tilting the heavy object while holding the support of the lower end of the large heavy object, placed on the traveling carriage on the traveling rail in a sideways state, and after the movement by the traveling carriage,
The large heavy object is relocated by taking over.

(2) Operation The large heavy object is lifted and lifted while maintaining the vertical posture in the rotary transport section, and is laid down in a sideways state when relocated from the rotary transport section to the linear transport section. In the moving conveyance unit, the vehicle is placed on a plurality of traveling vehicles in a state of being laid sideways, and is intercepted in a horizontal state by the interception unit, and then transferred to another transfer means.

(3) Embodiment An embodiment of a system for transporting a large heavy object such as a steam generator according to the present invention will be described with reference to the drawings. FIG. 1 to FIG. 8 show an application example of the steam generator in a nuclear power plant as a working example. That is, FIGS. 1 to 3 show the entire configuration of the construction system, and FIGS. 4 to 8 show the respective partial configurations. In the figure, H is a building, which houses a nuclear reactor and a steam generator, and is usually constructed in a cylindrical shell structure with a frame structure made of concrete for shielding. In the building H, 100 is a frame, 102 is an opening, and 104 is a guide rail of a working rotary crane formed on the inner wall of the building H. G is a steam generator housed in the building H, and two steam generators are installed at symmetric positions. The steam generator G is extremely heavy, and as shown in FIG. 9, is composed of an upper large-diameter cylindrical portion 110 and a lower small-diameter cylindrical portion 112, and an upper projection 114 is provided on the top of the large-diameter cylindrical portion 110. The ear 1 on the side of the large-diameter cylindrical portion 110
16. A lower protrusion 118 is provided at the bottom of the small-diameter cylindrical portion, and the hanging operation of the present embodiment is performed using the ear portion 116 and the lower protrusion 118. In this embodiment, a series of construction means and devices for removing the steam generator G from the building H and newly installing the steam generator G are disclosed.

FIGS. 1 to 3 show the entire configuration of a steam generator transport system S of this embodiment. As shown in these figures, this transport system S is composed of two main components, a rotary transport section 1 and a linear transport section 2, and the linear transport section 2 has a vertical transport section 2A and a horizontal transport section 2A. It is composed of two components, a part 2B. A rotary gantry crane has a primary function in the rotary transport section 1, and a traveling vehicle provided with a tilting support platform has a primary function in the linear transport section 2.

Hereinafter, a detailed configuration of each section will be described. Rotating and transporting unit 1 The rotating and transporting unit 1 is installed in a building H, and a support 5 is erected at a center thereof via a base 4. Prop 5
A horizontal beam 7 radially extends in a bifurcated manner in the radial direction via a rotation support base 6 having a rotation bearing mechanism. Horizontal beam 7
Has rigidity, is rigidly connected at the intersection thereof, and a reinforcing beam 8 is laterally bridged between the radial ends to form a triangular frame as a whole. If the rigidity of the horizontal beam 7 is maintained, the reinforcing beam 8 can be omitted as appropriate. At the radial end of each horizontal beam 7, a support cart 11 having traveling wheels 10 is provided, and is mounted on the guide rail 104 of the building H via the support cart 11. The support cart 11 is of a self-propelled type having a built-in drive mechanism or a transit type that obtains a driving force from another, whereby the horizontal beam 7 is mounted on the column 5 and the guide rail 104 so as to be rotatable around the column 5. Is placed. An intermediate beam 13 having a gate shape is installed at an intermediate position of the horizontal beam 7. A hoisting device 14 is provided at an intermediate position between the beams of the intermediate beam 13. 14a is a hanging wire of the hoisting device 14. Since the intermediate beam 13 has a gate shape, the head of the object to be hoisted (here, the steam generator) can have a large head.
The rotary transport unit 1 is of a so-called gantry crane type, and in this embodiment, is referred to as a rotary gantry crane, and the horizontal beam 7, the supporting cart 11, and the intermediate beam 13 form a body of the rotary gantry crane.

Vertical feed unit 2A Referring to FIGS. 1 to 3 and FIGS.
A is a traveling rail 2 laid both inside and outside the building H.
0 and a plurality of traveling vehicles 21 traveling on the traveling rail 20 and carrying the steam generator G mounted thereon. (Running Rail 20) The running rail 20 extends from the inside of the building H to the outside of the building H through the opening 102 thereof. Outside the building H, in this embodiment, the traveling rail 20 is supported via the support 23 in relation to the ground surface, but this is not essential.

(Travel vehicle 21) As shown in FIG. 4, the traveling vehicle 21 includes a front traveling vehicle 21A and an intermediate traveling vehicle 2
1B, and a rear traveling vehicle 21C, and three vehicles are prepared in this embodiment. Then, the respective traveling vehicles 21A, 21
B and 21C have the same vehicle body 25 and wheels 26, but the upper configuration differs depending on the mounting position of the steam generator G and the supporting method. Referring to FIGS. 5 and 6, the front traveling vehicle 21A has a tilt support device 28 installed at the center of the vehicle body 25. The tilt support device 28 includes a fixed base 29 fixed on the vehicle body 25 and a support plate 31 rotatable via a pin 30 with respect to the fixed base 29. More specifically, the support plate 31 is provided with a fitting hole 31a for receiving the lower projection 118 at the bottom of the steam generator G, and follows the tilt of the steam generator G by rotating around the pin 30, and The load of the generator G is supported, and the load is transmitted from the support plate 31 to the fixed base 29 via the pins 30 (see FIG. 6). The front traveling vehicle 21A receives a pulling force by a winch (not shown) and resists a forward thrust force in a tilting operation of the steam generator G described later. For this reason, the front traveling truck 21A is appropriately equipped with a braking device for the wheels 26. As shown in FIGS. 4, 7, and 8, the support 33 of the intermediate traveling vehicle 21 </ b> B receives the small-diameter cylindrical portion 112 while the steam generator G is lying down, and the support 34 of the rear traveling vehicle 21 </ b> C The large diameter cylindrical portion 110 is received with the generator G lying down. These traveling vehicles 21
Are sequentially installed on the traveling rail 20 using a separately prepared crane as described later. Further, the traveling vehicles 21A, 21B, and 21C are connected to each other with appropriate connecting members so as not to be separated from each other.

[0011] lateral feeding section 2B Referring again to FIGS. 1 to 3, the lateral feeding section 2B is provided outside of the building H, and portal member 36 which is installed two phases parallel,該門type And a traveling hoisting device 37 installed on the member 36. More specifically, the gate-shaped member 36 has a large rigidity as a so-called ramen structure from the column portion 36a and the beam portion 36b, and is arranged so as to extend across the running rail 20 of the vertical feed portion 2A at right angles. The members 36 are arranged at a predetermined distance from each other, and the pillars 36 on the same side thereof are arranged.
a is fixed to the base 38 and the bracing 3
9 also reinforced. The traveling hoisting device 37 is disposed on the beam portion 36b of the gate member 36 so as to be able to travel with the beam portion 36b as a guide, and can take up the steam generator G together with the lifting and lowering operations of the suspension wire 37a. And The traveling rail 20 immediately below the portal member 36
In addition, a transport vehicle is appropriately placed on the side of the support base 23,
The steam generator G lifted from the hoisting device 37 is placed.

As described above, the transport system S of the present embodiment
However, the supporting carriage 11 of the gantry crane frame in the rotary transport unit 1 is provided with the existing guide rail 10 of the building H.
4, when the guide rail 104 is not provided, a temporary guide rail is separately provided in an elevated manner or arranged on the floor. In the elevated type, it is arranged higher than the opening 102, and in the floor type, the body of the gantry crane has legs,
The support cart 11 is provided at the lower end of the leg.

The operation of removing the steam generator G by the transport system S of this embodiment and the method of carrying in the steam generator G will be described. First, the removal operation will be described based on the operation procedure.

(1) In the building H, a rotary transfer section, that is, a rotating gantry crane 1 is installed, and a running rail 20 of a vertical feeding section 2A is installed together with its support 23 from the inside of the building H to the outside. At the same time, outside the building H, the take-over portion 2B is installed across the traveling rail 20.
Then, the front traveling cart 21 is attached to the traveling rail 20 in the building H.
A is installed.

(2) The rotating gantry crane 1 is rotated, and its hoisting device 14 is placed above _one of the steam generators G1.
Position. Thereafter, the suspension wire 14a of the hoisting device 14 is engaged with the ear 116 of the steam generator G.

(3) The hoisting device 14 is driven to lift the steam generator G, and then the rotary gantry crane 1 is rotated to move the steam generator G to the center position of the traveling rail 20. At this time, the front traveling vehicle 21A is disposed immediately below the steam generator G in a state where the support plate 31 of the tilt support platform device 28 is tilted horizontally (see FIG. 6).

(4) The hoisting device 14 is driven to lift the steam generator G, and a lower projection 118 at the bottom of the steam generator G is provided.
Into the fitting hole 31a of the support plate 31.

(5) Thereafter, the front traveling cart 21A is advanced toward the opening 102 of the building H, that is, outward.
Also, the lifting of the hoisting device 14 causes the steam generator G to tilt. FIG. 10 schematically shows this operation state, wherein α indicates the forward direction of the front traveling vehicle 21A, and β indicates the tilt direction of the steam generator G. As can be seen from the figure, the support plate 31 of the tilt support device 28 of the front traveling vehicle 21A supports the load of the steam generator G and follows the tilt thereof. The suspension wire 14a is a steam generator G
To bear most of the weight. The forward traveling bogie 21A advances while braking the wheels 26. Further, the braking is performed in a γ direction by a winch or the like. When the steam generator G is sufficiently tilted, the intermediate traveling vehicle 21B and the rear traveling vehicle 21C are installed on the traveling rail 20 in the open space.

(6) Connect the steam generator G to each of the traveling vehicles 21A, 21A.
1B and 21C are supported sideways on the respective support bases 28, 33 and 34. Thereafter, the engagement with the hoisting device 14 is released. FIG. 11 shows this state.

(7) Each traveling vehicle 21 is driven by a driving means such as a winch, and the steam generator G is moved out of the building H.
It is carried out to a predetermined position of the take-over part 2B.

(8) The suspension wire 37a of the traveling hoisting device 37 of the horizontal take-up section 2B is engaged with the steam generator G, and the traveling hoisting device 37 is driven to lift the steam generator G.

(9) The steam generator G is moved to the lateral position of the traveling rail 20 by laterally moving the traveling hoisting device 37, and then the steam generator G is lifted by lowering the traveling hoisting device 37. To be mounted on the transport vehicle prepared in During this time, the traveling vehicle 20 is carried into the same building H.

[0023] (10) a rotating gantry crane 1 to move the other to the steam generator G _2, repeating the above steps (2) to (9).

For loading / installing a new steam generator G, the reverse of the above procedure is basically performed. Less than,
A brief description will be given. (11) In the pre-emption section 2B of the linear transfer section 1 outside the building H,
The steam generator G is lifted by the traveling hoisting device 37,
It moves laterally and is placed on each traveling vehicle 21 arranged on the traveling rail 20. At this time, the front traveling vehicle 21A is deployed after the other traveling vehicles 21B and 21C are deployed. (12) The steam generator G is turned into the building H by driving the traveling vehicle 21.
Gantry crane 1
The ear 116 of the steam generator G is located immediately below the position 4. (13) The hanging wire 14a of the rotating gantry crane 1
And the front traveling bogie 21A is retracted. During this time, the other traveling vehicles 21B and 21C are removed from the traveling rail 20 using another crane. (14) When the steam generator G is suspended vertically, the front traveling cart 21A is removed, and then the rotating gantry crane 21 is rotated to move to the installation position of the steam generator G. (15) The hoisting device 14 is driven to lift the steam generator G to the installation position, and the steam generator G is installed.

(Operation and Effect of Embodiment) According to the above-described steam generator transfer system and transfer method of the present embodiment,
The steam generator G is lifted and lifted while maintaining the vertical posture in the rotary transport unit 1, and is laid down in a sideways state when relocated from the rotary transport unit 1 to the linear transport unit 2. 2
In this example, the trolleys 21A, 21B, and 21C are installed on the traveling carts in a state of lying sideways. Therefore, according to the present embodiment, unlike the conventional transport method of this type, it is not necessary to remove a large-scale roof of a building and to introduce a large crane. Since the equipment is used, the cost required for the equipment can be reduced, and the construction can be performed economically. That is, according to the present embodiment, the steam generator G can be reliably lifted and lowered with a simple operation by the relatively small rotating gantry crane disposed in the building H, and Existing guide rail 104 in H
The use of inexpensive crane equipment is sufficient. In addition, in the relocation operation of the steam generator G from the vertical state to the sideways state, the traveling cart 21A with the tilting support base device 28 that constantly supports the lower end of the steam generator G is used, and this operation is performed safely and reliably. Be executed. Further, according to the present embodiment, the steam generator G is in a sideways position, and therefore, when the steam generator G is carried out of the building H, the opening 102 can be made as small as possible. Can be made. In the intercepting operation of the steam generator G by the intercepting section 2B, the lift of the lifting and the lifting is as small as possible, and the operation can be performed reliably and safely.

(Another Embodiment) In the following embodiment, a transport system using a working rotary crane (also referred to as a polar crane) permanently installed in a building H is shown. FIGS. 12 and 13 show one embodiment of the present invention, in which P is a working rotary crane, and guide rails 104 are provided at both ends of a beam member 130.
The vehicle is equipped with a wheel portion 132 running thereon, and a slidable traveling hoist 134 is provided on the beam member 130 by using the beam member 130 as a guide.
Is arranged. The beam member 130 is provided with two beam elements 130a facing each other at a predetermined interval, and the wheel portion 132 is provided with a drive mechanism to constitute a so-called self-propelled rotary crane. Thus, in this embodiment, the rotating gantry crane 1 has its supporting column 5 inserted through the gap between the beam members 130, and its supporting cart 11 connected to the wheel portion 132 by the connecting member 136.
Are connected.

According to this aspect, since the rotary drive of the rotary transport unit 1 is performed by the existing polar crane P,
The driving mechanism is simple, and the polar crane P can be effectively used.

FIG. 14 shows still another embodiment. In this embodiment, the same operation as the previous embodiment is performed except that the number of the beam members 140 of the working rotary crane P is one. In the rotating gantry crane 1, the column 5 is made lower than the beam 140, and the rotating support 6 is placed thereon. Then, an adapter 142 disposed across the beam member 140 is fixed on the rotation support base 6, and the horizontal beam 7 is placed and fixed on the adapter 142.

In addition to the above-described embodiment, a mode is adopted in which the horizontal beam 7 of the rotating gantry crane frame is directly mounted and fixed on the beam members (130, 140) of the working rotating crane P without using the support column 5. sell. According to this aspect, the column 5 can be abolished, and materials can be saved. In addition, the space of the column 5 can be made large, and the traveling vehicle 21 can be made to stand by in the space, thereby improving the work efficiency.

The present invention is not limited to the above embodiment, and various design changes can be made within the scope of the basic technical concept of the present invention.

C. Effects of the Invention According to the present invention, a relatively small rotating gantry crane disposed in a building can reliably lift and lift a large heavy object with a simple operation. In addition, by using the existing guide rails in the building, inexpensive crane equipment is sufficient. Further, in the transfer operation of the large heavy object from the vertical state to the sideways state, a traveling vehicle with a tilting support base device that supports the lower end of the large heavy object is used, and this operation is performed safely and reliably. Furthermore, since the large-sized heavy object is in a sideways state, the opening thereof can be made as small as possible when carrying it out of the building, and the installation or opening of the opening can be made economically. The operation of taking over large heavy objects by the take-over section has as little lifting and lifting as possible, and the operation can be performed reliably and safely. Therefore, according to the present invention, unlike the conventional transport method of this type, it is not necessary to remove a large-scale building roof and to introduce a large crane, a relatively small facility is required, and the existing method is not required. Since the equipment is used, the cost required for the equipment can be reduced, and the construction can be performed economically.

[Brief description of the drawings]

FIG. 1 is a plan view showing the entirety of an embodiment of a large heavy load transport system according to the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a view in the direction of arrow III in FIG. 1;

FIG. 4 is a side view showing the overall configuration of a vertical feed section including a traveling rail and a traveling vehicle.

FIG. 5A is an enlarged side view of the front traveling vehicle. (b) is a front view of the front traveling bogie (a view in the direction of arrow V in FIG. (a)).

FIG. 6 is a sectional view showing a support state of the front traveling vehicle.

FIG. 7 is a front view of the intermediate traveling bogie (a view in the direction of arrow VII in FIG. 4).

FIG. 8 is a front view of the rear traveling bogie (a view in the direction of arrow VIII in FIG. 4).

FIG. 9 (a) is a plan view of a steam generator. (b) The figure is a side view of the steam generator.

FIG. 10 is a work procedure diagram showing a steam generator falling procedure using a front traveling cart.

FIG. 11 is a view showing how to support a steam generator by a traveling vehicle.

FIG. 12 is a cross-sectional view showing another mode of the rotary transport unit.

13A is an enlarged view of a part X in FIG. 12; (b) Figure is (a)
XIII-XIII sectional view of the figure.

FIG. 14 (a) is a view showing still another embodiment of the rotary transport unit. (b)
The figure is a sectional view taken along the line XIV-XIV in the figure (a).

[Explanation of symbols]

S: transport system, 1: rotating transport unit, 2: linear transport unit,
2A: vertical feed portion, 2B: take-over portion, 5: support column, 7: horizontal beam, 10: running wheel, 11: support cart, 13: intermediate beam,
14 ... hoisting device, 20 ... running path, 21 ... running trolley, 2
1A: front traveling trolley, 28: tilting support platform device

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B66C 19/00 B66C 5/06 B66C 5/10 G21C 13/00

Claims (7)

(57) [Claims] 1. A gantry crane body that rotates around the stanchion and travels with traveling wheels, and is supported by the gantry crane body.
A rotating transport unit including a hoisting device for lifting and lifting heavy objects, a traveling path laid on an extension of the support, and a heavy object placed on a sideways state, traveling on the traveling path, at least One of them is a traveling bogie that includes a tilt fixing portion that supports the lower end of the heavy object and follows the tilt of the heavy object,
A linear transport section comprising: a vertical feed section comprising: a vertical feed section; and a take-up section for picking up / lifting the heavy object while intercepting the heavy object on the traveling trolley. 2. The transport system for a large heavy object according to claim 1, wherein the traveling wheels of the rotary transport unit are driven by self-propelled operation. 3. The transport system for a large heavy object according to claim 1, wherein the traveling wheels of the rotary transport unit are connected to a drive unit of a rotary crane in the building. 4. A system for transporting a large heavy object according to claim 1, wherein the rotating center of the rotating gantry crane body is mounted on a rotating crane in the building, instead of the column serving as the center of rotation. 5. A large-sized heavy object is lifted from its installation position by a supporting column or a rotating gantry crane that rotates around the rotation center of the rotating crane, and is moved to a predetermined position by rotating motion. Supporting the lower end of the large heavy object, and tilting the heavy object while holding the support of the lower end of the large heavy object, and placing the heavy object sideways on the traveling cart on the traveling rail, and after moving by the traveling cart, A method for transporting a large heavy object, wherein the large heavy object is relocated by interception. 6. A column serving as a center of rotation, two horizontal beams extending radially from an upper end of the column, a traveling wheel unit provided at each radial end of the horizontal beam, A rotating gantry crane consisting of a lifting device for lifting and lifting mounted on an intermediate beam installed at an intermediate position between two horizontal beams. 7. A tilt support base device which is disposed on a traveling path and on which a large heavy object is placed in a sideways position, supports a lower end of the large heavy object and follows the inclination of the large heavy object. Equipped traveling cart.