JPH06263389A - Method and device for transporting large-sized heavy article such as steam generator in nuclear power generation facility - Google Patents

Abstract

PURPOSE: To provide a system for conveying large and heavy objects such as steam generators, the system permitting rational and efficient operations in renewing or replacing a steam generator in a building, safe construction work, and a reduction in operational cost. CONSTITUTION: This system for conveying large and heavy objects comprises a rotary conveying part 1 for raising and lowering heavy objects by means of a gantry crane which rotates about a column 3 disposed in a center position in a building H, and a direct-moving conveying part 2 which supports its lower end so that it lies on its side on a traveling truck when lowering a heavy object tilts the object to convey it out of the building.

Description

Detailed Description of the Invention

A. Object of the invention (1) Field of industrial application The present invention relates to a transportation system for carrying out or carrying in a large vertically long heavy object installed in a building outside the building, and particularly to The present invention relates to a transportation system for removing or newly loading a steam generator housed in a housing dome in a nuclear power generation facility, and a method and a device therefor.

(2) Conventional Technology 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 has a long service life. In the renewal / replacement of the steam generator, the roof (dome) of the housing building is removed and the work is performed using a large crane. However, depending on this method, large-scale roof removal work is required, and hanging work of a large crane requires a large lift because the steam generator is vertically long, and it is easy to vibrate and poses a serious risk. Is inefficient, labor-intensive, and ultimately expensive.

(3) Problems to be Solved by the Invention In view of the above situation, the present invention aims to rationalize and improve the efficiency of work when updating or replacing a steam generator in a building of this type.
It is an object of the present invention to provide a system for carrying in / out a large heavy object such as a steam generator that can be safely constructed and can reduce the work cost.

B. Configuration of the Invention (1) Means for Solving the Problems The large-scale heavy object transport system and the method for transporting the same of the present invention have the following configurations for achieving the above object. A first main configuration of the present invention relates to a transport system, which includes a rotary transport unit and a linear transport unit, and (i) the rotary transport unit is a column that is a center of rotation and rotates around the column. A rotary gantry crane body part that travels with traveling wheels, and a hoisting device that is supported by the gantry crane body part and that lifts and lowers heavy objects. The running path laid on the extension line of, the heavy object is placed in a state of being laid down and travels on the running path, at least one of which supports the lower end of the heavy object and follows the tilting of the heavy object. The present invention is characterized in that it comprises a vertical feed section composed of a traveling carriage provided with a tilting and fixing section, and a horizontal take-up section for laterally picking up and lowering the heavy object on the traveling bogie. A second main configuration of the present invention also relates to a transfer system, which utilizes a rotary crane in a building, and in the first invention,
The rotation center of the rotating gantry crane body part is placed on the rotating crane inside the building, instead of the support pillar which is the center of rotation. The third main configuration of the present invention relates to a transportation method, in which a large heavy object is lifted from its installation position by a support gantry or a rotating gantry crane that rotates around the rotation center of the rotating crane, and is moved to a predetermined position by rotational movement. Let's squeeze the large heavy goods,
While supporting the lower end of the large heavy object and tilting the heavy object while holding the lower end support of the large heavy object, the heavy object is placed on the traveling carriage on the traveling rail in a state of lying down, and after being moved by the traveling carriage,
It is characterized in that the large heavy object is transferred by interception.

(2) Action A large heavy object is lifted and lowered while maintaining a vertical posture in the rotary transport unit, and is laid down in a horizontal state when it is transferred from the rotary transport unit to the linear transport unit. In the moving transporting unit, it is placed on a plurality of traveling carriages in a state of being laid down sideways, and in the horizontal capturing unit, it is horizontally captured and then transferred to another transfer means.

(3) Embodiment An embodiment of a large heavy object transport system 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 generation facility for carrying-in and carrying-out construction as one example thereof. 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 having a skeleton structure made of shielding concrete. In the building H, 100 is a frame part, 102 is an opening part, and 104 is a guide rail of a rotary crane for work formed on the inner wall of the building H. Further, G is a steam generator housed in the building H, and two steam generators are installed at symmetrical positions. The steam generator G has an extremely large weight 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 protrusion 114 is provided on the top of the large-diameter cylindrical portion 110. , The ear portion 1 on the side of the large-diameter cylindrical portion 110.
16. A lower protrusion 118 is provided on the bottom of the small-diameter cylindrical portion, and the hanging operation of the present embodiment is performed by using the ear portion 116 and the lower protrusion 118. Thus, the present embodiment discloses a series of construction means and devices for removing the steam generator G from the building H and newly installing it.

1 to 3 show the entire construction of a transport system S for a steam generator according to this embodiment. As shown in these drawings, the transport system S is composed of two main components, a rotary transport unit 1 and a linear motion transport unit 2, and the linear motion transport unit 2 includes a vertical transport unit 2A and a lateral transport unit. It is composed of two constituent parts, a part 2B. The rotary gantry crane has a main function in the rotary transfer unit 1, and the traveling carriage having a tilting support base has a main function in the linear motion transfer unit 2.

The detailed structure of each part will be described below. Rotating and Conveying Unit 1 The rotating and conveying unit 1 is installed in the building H, and a pillar 5 is erected in the center thereof via a base 4. Prop 5
A horizontal beam 7 is radially extended in a radial two-forked shape via a rotary support 6 having a rotary bearing mechanism. Horizontal beam 7
Has rigidity and is rigidly connected at its crossing portion, and a reinforcing beam 8 is laterally provided between the radial end portions to form a triangular frame shape as a whole. If the rigidity of the horizontal beam 7 is maintained, the reinforcing beam 8 may be omitted as appropriate. A supporting carriage 11 having traveling wheels 10 is mounted on the radial end of each horizontal beam 7, and is mounted on the guide rail 104 of the building H via the supporting carriage 11. This support carriage 11 adopts a self-propelled type having a built-in drive mechanism or a self-propelled type that obtains a driving force from another, whereby the horizontal beam 7 is rotatably mounted around the column 5 on the column 5 and the guide rail 104. Placed. A gate-shaped intermediate beam 13 is installed at an intermediate position of the horizontal beam 7. A hoisting device 14 is installed at an intermediate position of the beam portion of the intermediate beam 13. Reference numeral 14a is a hanging wire of the hoisting device 14. Since the intermediate beam 13 has a gate shape, it is possible to take a large lift of the object to be hoisted (here, the steam generator).
The rotary conveyance unit 1 is of a so-called gantry crane type, and is called a rotary gantry crane in this embodiment, and the horizontal beam 7, the support carriage 11, and the intermediate beam 13 form a skeleton unit of the rotary gantry crane.

Vertical Feeding Section 2A With reference to FIGS. 1 to 3 and FIGS. 4 to 8, the vertical feeding section 2A
A is a traveling rail 2 laid inside and outside the building H
0, and a plurality of traveling carriages 21 that travel on the traveling rail 20 and carry the steam generator G on board. (Traveling Rail 20) The traveling rail 20 extends from the inside of the building H through the opening 102 to the outside of the building H. Outside the building H, the traveling rail 20 is supported via the support base 23 in the present embodiment in relation to the ground surface, but this is not an essential matter.

(Traveling 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 carriage 21C, and three vehicles in this embodiment are prepared. Then, each traveling carriage 21A, 21
Although the vehicle body 25 and the wheels 26 are common to B and 21C, the configuration of the upper portion thereof differs depending on the mounting position of the steam generator G and the supporting method. The front traveling vehicle 21A has a tilt support device 28 installed at the center of a vehicle body 25 with reference to FIGS. The tilting support base device 28 includes a fixed base 29 fixed on the vehicle body 25, and a support plate 31 which is rotatable with respect to the fixed base 29 via a pin 30. More specifically, the support plate 31 is provided with a fitting hole 31a for receiving the lower protrusion 118 at the bottom of the steam generator G, so that the rotation of the pin 30 follows the tilting of the steam generator G 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 pin 30 (see FIG. 6). The front traveling carriage 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. Therefore, the front traveling carriage 21A is appropriately equipped with a braking device for the wheels 26. As shown in FIG. 4, FIG. 7, and FIG. 8, the support platform 33 of the intermediate traveling vehicle 21B receives the small-diameter cylindrical portion 112 when the steam generator G is lying down, and the support platform 34 of the rear traveling vehicle 21C is The generator G receives the large-diameter cylindrical portion 110 when the generator G is lying down. These traveling carriages 21
As will be described later, the cranes are sequentially installed on the traveling rail 20 with a separately prepared crane. Further, the traveling carriages 21A, 21B and 21C are coupled to each other with an appropriate coupling member so as not to separate from each other.

Side-feeding section 2B Referring again to FIGS. 1 to 3, the side-feeding section 2B is installed outside the building H, and two gate-shaped members 36 installed in parallel with each other, and the gate-shaped member 36. A traveling type hoisting device 37 installed on the member 36. More specifically, the gate-shaped member 36 has a great rigidity as a so-called rigid frame structure composed of a pillar portion 36a and a beam portion 36b, and is arranged across the traveling rail 20 of the vertical feeding portion 2A in an orthogonal manner, The members 36 are arranged at a predetermined distance from each other, and the pillar portions 36 on the same side thereof are arranged.
a Mutually fixed to the base 38, and bracing 3
It is also reinforced by 9. The traveling type hoisting device 37 is disposed on the beam portion 36b of the gate-shaped member 36 so as to be able to travel with the beam portion 36b as a guide, and can wind up the hanging wire 37a and take down the steam generator G along with the operation. And The traveling rail 20 directly below the gate-shaped member 36
And, on the side of the support table 23, make the transportation vehicle stand by as appropriate,
The steam generator G, which is lowered from the hoisting device 37, is placed.

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

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

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

(2) The rotating gantry crane 1 is rotated so that the hoisting device 14 is provided above _one of the steam generators G _1.
Position. Then, the suspension wire 14a of the hoisting device 14 is engaged with the ear portion 116 of the steam generator G.

(3) The hoisting device 14 is driven to lift up 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 carriage 21A is arranged immediately below the steam generator G in a state in which the support plate 31 of the tilt support base device 28 is tilted horizontally (see FIG. 6).

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

(5) Thereafter, the front traveling carriage 21A is moved forward toward the opening 102 side of the building H, that is, outward.
In addition, the steam generator G is tilted by lowering the hoisting device 14. FIG. 10 schematically shows this working state, where α indicates the forward direction of the front traveling carriage 21A, and β indicates the tilting 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 carriage 21A supports the load of the steam generator G and follows the tilt. The hanging wire 14a is a steam generator G
Bear most of the weight. The forward movement of the front traveling carriage 21A is performed while braking the wheels 26. Also, it is performed while braking in the γ direction by a winch or the like. When the steam generator G is sufficiently tilted, the intermediate traveling carriage 21B and the rear traveling carriage 21C are installed on the traveling rail 20 in the open space.

(6) The steam generator G is mounted on each traveling carriage 21A, 2
The supporting bases 28, 33 and 34 of 1B and 21C are supported in a state of being laid down sideways. Then, the engagement with the hoisting device 14 is released. FIG. 11 shows this state.

(7) Each traveling carriage 21 is driven by a driving means such as a winch to move the steam generator G outside the building H,
It is carried out to a predetermined position of the capture section 2B.

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

(9) By moving the traveling hoisting device 37 laterally, the steam generator G is moved to the lateral position of the traveling rail 20, and then by lowering the traveling hoisting device 37, the steam generator G is lowered, and below it. It will be installed in the transportation vehicle prepared in. During this time, the traveling carriage 20 is carried into the same building H.

(10) The rotating gantry crane 1 is moved to another steam generator G ₂ and the above steps (2) to (9) are repeated.

Regarding the loading / installation of the new steam generator G, basically the reverse process of the above procedure is carried out. Less than,
Briefly explained. (11) In the take-over section 2B of the linear transfer section 1 outside the building H,
Lift the steam generator G with the traveling hoisting device 37,
The vehicle laterally moves and is placed on each traveling carriage 21 arranged on the traveling rail 20. At this time, the front traveling carriage 21A is arranged after the other traveling carriages 21B and 21C are arranged. (12) Drive the traveling carriage 21 to move the steam generator G to the building H.
Hoisting device 1 for rotating gantry crane 1
Position the ears 116 of the steam generator G directly below 4. (13) Hanging wire 14a of the rotating gantry crane 1
And the front traveling carriage 21A is moved backward. During this time, the other traveling carriages 21B and 21C are removed from the traveling rail 20 by using another crane. (14) If the steam generator G is suspended vertically, the front traveling carriage 21A is removed, and then the rotary gantry crane 21 is rotated to move to the installation position of the steam generator G. (15) Drive the hoisting device 14 to lower the steam generator G to the installation position, and install the steam generator G.

(Operation and Effect of the Embodiment) According to the above-described steam generator transfer system and transfer method of the present embodiment,
The steam generator G is lifted / lowered while maintaining the vertical posture in the rotary transport unit 1, and is laid down in a sideways state when being transferred from the rotary transport unit 1 to the linear motion transport unit 2. Two
Then, it is installed on the traveling carriages 21A, 21B, and 21C in a sideways state. Therefore, according to the present embodiment, unlike the conventional transfer method of this type, it is not necessary to remove the roof of a large building and to introduce a large crane, and a relatively small-scale facility is required, and the existing Since the equipment of is used, the cost required for the equipment can be reduced and the construction can be performed economically. That is, according to this embodiment, the steam generator G can be reliably lifted and lowered by a simple operation by the relatively small-scale rotating gantry crane arranged in the building H, and Existing guide rail 104 in H
It is possible to use cheap crane equipment by using. In the operation of moving the steam generator G from the vertical state to the sideways state, the traveling carriage 21A with the tilt support device 28 that consistently supports the lower end of the steam generator G is used, and this operation is safe and reliable. To be executed. Furthermore, according to the present embodiment, since the steam generator G is in a state of being laid down sideways, the opening 102 can be as small as possible when it is carried out of the building H, and it is economical to install or open the opening 102. Can be done. As for the horizontal operation of the steam generator G by the horizontal portion 2B, the lift of the upper and lower sides is as small as possible, and the operation can be performed reliably and safely.

(Other Embodiment) In the following embodiment, a transfer system using a rotary working crane (also called a polar crane) permanently installed in the building H will be shown. 12 and 13 show one mode thereof, P is a rotary crane for the work, and the guide rails 104 are provided at both ends of the beam member 130.
A wheel unit 132 running above is provided, and a traveling hoist 134 which is slidable on the beam member 130 using the beam member 130 as a guide.
Is arranged. Two beam elements 130a are arranged relative to each other in the beam member 130 with a predetermined gap therebetween, and the wheel portion 132 is provided with a drive mechanism, which constitutes a so-called self-propelled rotary crane. Therefore, in this aspect, in the rotary gantry crane 1, the columns 5 of the rotary gantry crane 1 are inserted into the gaps of the beam members 130, and the supporting carriage 11 is connected to the wheel portions 132 by the connecting members 136.
Are connected with.

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

FIG. 14 shows another mode. In this aspect, the beam material 140 of the working rotary crane P is in accordance with the previous aspect except that the number of beams 140 is one. In the rotating gantry crane 1, the support column 5 is made lower than the beam member 140, and the rotation support base 6 is placed thereon. An adapter 142 arranged across the beam member 140 is fixed on the rotation support base 6, and the horizontal beam 7 is mounted and fixed on the adapter 142.

In addition to the above-mentioned embodiment, the horizontal beam 7 of the rotary gantry crane frame is directly placed and fixed on the beam member (130, 140) of the working rotary crane P without using the column 5. sell. According to this aspect, the columns 5 can be eliminated, the material can be saved, the space of the columns 5 can be made large, and the traveling carriage 21 can be made to stand by in the space portion, so that the working efficiency can be improved.

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.

C. Effect of the Invention According to the present invention, a relatively small rotating gantry crane arranged in a building can reliably lift and lower a large heavy object with a simple operation. Moreover, by using the existing guide rails in the building, inexpensive crane equipment can be used. Further, in the transfer operation from a vertical state of a large heavy object to a sideways state, a traveling carriage with a tilt support device that consistently supports the lower end of the large heavy object is used, and this operation is performed safely and reliably. Further, since the large heavy object is laid down sideways, the opening can be as small as possible when it is carried out to the outside of the building, and the opening or the opening can be economically installed. The horizontal lifting operation of a large heavy object by the horizontal catching section allows the lifting height of the lifting and lowering arms to be as small as possible, and the operation can be performed reliably and safely. Therefore, according to the present invention, unlike the conventional transfer method of this kind, it is not necessary to remove a large-scale roof of a building and to introduce a large crane, and a relatively small-scale facility is required, and Since the equipment is used, the cost required for the equipment can be reduced and the construction can be performed economically.

[Brief description of drawings]

FIG. 1 is a plan configuration view showing an entire embodiment of a large-sized heavy goods transport system of the present invention.

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

FIG. 3 is a view on arrow III in FIG.

FIG. 4 is a side view showing an overall configuration of a vertical feed unit including a traveling rail and a traveling carriage.

FIG. 5 (a) is an enlarged side view of the front traveling carriage. (b) The figure is a front view of the front trolley (a view in the direction of arrow V in the (a) figure).

FIG. 6 is a sectional view showing a supporting state of a front traveling carriage.

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

FIG. 8 is a front view of the rear traveling carriage (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 procedure of falling over the steam generator by the front traveling carriage.

FIG. 11 is a diagram showing how to support the steam generator by the traveling carriage.

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

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

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

[Explanation of symbols]

S ... Transport system, 1 ... Rotating transport unit, 2 ... Linear transport unit,
2A ... longitudinal feed section, 2B ... horizontal take-up section, 5 ... posts, 7 ... horizontal beam, 10 ... traveling wheels, 11 ... supporting carriage, 13 ... intermediate beam,
14 ... Winding device, 20 ... Traveling road, 21 ... Traveling carriage, 2
1A ... front trolley, 28 ... tilt support device

Claims (7)

[Claims] 1. A support pillar that is a center of rotation, a rotating gantry crane body portion that rotates around the pillar and travels with traveling wheels, and is supported by the gantry crane body portion,
A rotating and transporting unit composed of a hoisting device for lifting and lowering heavy objects, a traveling path laid on an extension line of the support column, and a heavy object placed in a state of lying down, traveling on the traveling path, and at least One of them is a traveling carriage that supports a lower end of a heavy object and is provided with a tilt fixing portion that follows the tilt of the heavy object,
A large-sized heavy goods transport system comprising: a vertical feed section including; and a linear motion transport section configured to horizontally pick up a heavy article on the traveling carriage and lift and lower the heavy article. 2. The large heavy object transfer system according to claim 1, wherein the traveling wheels of the rotary transfer section are driven by self-propelling. 3. The system for transporting large heavy goods according to claim 1, wherein the traveling wheels of the rotary transport unit are connected to the drive unit of the rotary crane in the building. 4. The system for transporting a large heavy object according to claim 1, wherein the center of rotation of the rotating gantry crane body part is placed on a rotating crane in the building, instead of the support pillar which is the center of rotation. 5. A large gantry is lifted from its installation position by a support gantry or a rotating gantry crane that rotates around the center of rotation of the rotary crane, and is moved to a predetermined position by rotational movement together with the swelling of the large heavy object. , Supporting the lower end of a large heavy object and tilting the heavy object while holding the lower end of the large heavy object, placing the heavy object on a traveling carriage on a traveling rail in a state of lying down, and after moving by the traveling carriage, A method for transporting a large heavy object, characterized in that the large heavy object is transferred by interception. 6. A pillar that serves as a center of rotation, two horizontal beams radially extending from an upper end of the pillar, traveling wheel portions provided at respective radial ends of the horizontal beam, and A rotating gantry crane consisting of a hoisting device for lifting and lowering, which is installed on the intermediate beam installed at the intermediate position of two horizontal beams. 7. A tilting support device for supporting a lower end of the large heavy object and following a tilt of the large heavy object in a traveling carriage that is placed on a traveling road and places a large heavy object in a sideways state. A traveling trolley provided.