JPS5934844B2 - Turbine equipment construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of constructing turbine equipment such as a nuclear power plant.

Generally, the condenser of the turbine equipment of a nuclear power plant is installed between the underground part and the above ground part of the turbine building.

C1 Conventionally, in order to construct such turbine equipment, as shown in Fig. 1, a part of the above-ground part B of the turbine building A is post-molded, and the parts constituting the condenser C are brought into this part. A water container carrying-in opening D is formed, and components are carried in through this condenser carrying-in opening D to assemble the condenser C.
Thereafter, as shown in FIG. 2, a post-condenser part was constructed to close the condenser entry opening D.

By the way, the condenser C is provided with a large number of condenser tubes, and the number reaches approximately 40,000 in total when three condensers C are provided, for example.

Conventionally, a large condenser main body member is first brought in and the main body portion of the condenser C is assembled.

Then, a temporary pedestal E is assembled around the condenser body, and condenser tubes F packed in, for example, 200 tubes are carried in from the condenser carrying-in opening D by a crane G or the like.
It was unpacked in turbine building A and installed on the main body of condenser C.

Therefore, in order to install the condenser tubes F..., 200 packages H... must be brought in and unpacked, and 40,000 condenser tubes F... must be installed. Furthermore, the height of the temporary pedestal E must be changed in accordance with the sorting and carrying out of unpacked packaging materials and the mounting position of the condenser tube, which requires a long construction period.

Therefore, the construction work for the condenser delivery opening D, which was carried out later, and the construction work inside the turbine building A related to this part, such as piping and wiring, will all be done after the assembly of the condenser C is completed. The work to bring in and install condenser tube F... of vessel C was a critical path and was a factor in prolonging the construction period.

The present invention has been made based on the above circumstances, and its purpose is to carry out condenser tube delivery and installation work in parallel with the construction work of the condenser delivery opening and the work inside the turbine building. The object of the present invention is to obtain a method for constructing turbine equipment that can shorten the construction period by preventing the condenser tube delivery and installation work from becoming a critical path.

The present invention will be explained below according to an embodiment shown in FIGS. 3 to 5.

First, as shown in Fig. 3a and b, the underground part 2 and the above ground part 3 of the turbine building 1 are constructed, and a part of the above ground part 3 is left as post-molding to form the condenser entry opening 4. ,
In addition, a tube loading pit 5 for loading condenser tubes is constructed adjacent to this underground portion 2.

This tube loading pit 5 was constructed when constructing and backfilling the underground portion 2 of the turbine building 1, and has a U-shaped cross section with an open top, and the surrounding wall is made of poured concrete.

The bottom surface of the tube loading pit 5 is inclined toward the turbine building 1 side, and a drainage pit 6 is formed at the end of the turbine building 1 side. Connect it to the groove.

Further, a tube carrying-in opening 8 is formed in the underground portion 2 of the turbine building 1 in correspondence with the tube carrying-in pit 5.

This tube introduction opening 8 is formed by embedding a sleeve 9 during concrete pouring.

Then, as shown in FIG. 3, the main body members of the condenser 11 are carried in through the condenser carrying-in opening 4 using a crane 10 or the like, and the condenser main body 12 is assembled.

Further, in parallel with this, an in-pit conveyor 13 and a winch 14 are installed in the tube carry-in pit 5.

After the lower part of the condenser body 12 is assembled and the condenser tubes 15... can be installed, the condenser tubes 15... are unpacked outside the turbine building 1 and the condenser tubes 15... are assembled. The water container tubes 15 are carried in one by one through the tube carrying pit 5 and the tube carrying opening 8 by the winch 14 and the pit conveyor 13,
Attach it to the condenser body 12.

Also, in parallel with this work, the upper part of the condenser main body 12 is assembled.

When the main body members of the condenser 11 are completed, the fourth
As shown in Figures a and b, a post-strike part of the above-ground part 3 of the turbine building 1 is constructed to close the condenser carry-in opening 4, and intermediate floors 16, 17, etc. to be provided in this part are also constructed.

After this construction is completed, work inside the turbine building 1 such as piping work will proceed, and the floors 16, 17, etc. will be used to perform work on the feed water heaters 18, 19 and related piping work.

Furthermore, a mole rail hoist 20 and a conveyor 21 inside the building that can be raised and lowered are installed using the intermediate floor 16 and the like.

In parallel with the above construction, condenser tube 15...
・Continue carrying in and installing.

Then, when the mounting position of the condenser tubes 15... is raised, the condenser tubes 15... that have been transported by the conveyor 13 in the pit are
.

In addition, this indoor conveyor 21 has a condenser tube 15.
Raise and lower according to the mounting position of...

When the installation of the condenser tubes 15 is completed, the upper opening of the tube loading pit 5 is closed with a concrete cover 22, as shown in FIG. 5, and waterproofing is performed by asphalt caulking.

Further, the tube introduction opening 8 is closed with a conch IJ block 23 or a blind sleeve.

In addition, the above-mentioned in-pit conveyor 13 and in-building conveyor 2
1 and the mole rail hoist 20, etc., are left in place without being removed, so that they can be used for carrying in and out the condenser tube 15... and other parts during periodic inspections and repairs later. put.

One embodiment of the present invention configured as described above is a condenser main body 1.
2 is assembled and the condenser tubes 15... are ready to be installed, the condenser tubes 15... can be carried in and installed via the tube carry-in pit 5 and the tube carry-in opening 8, so the condenser tubes 15... Immediately after finishing carrying in the main body parts 11, the condenser carrying-in opening 4 of the turbine building 1 is constructed and closed, and the construction inside the building is carried out by carrying in and installing the above-mentioned condenser tubes 15... This can be done in parallel with the construction work.

Therefore, the work for carrying in and installing the condenser tubes 15 does not become a critical path, and the construction period can be greatly shortened.

In addition, an in-pit conveyor 13 and an in-building conveyor 21 are provided in the tube delivery pit 5 and in the turbine building 1 to carry in the condenser tubes 15 one by one. Water vessel tube 15・
... can be unpacked, work can be made more efficient, packaging can be simple, and the tube loading pit 5 and tube loading opening 8 can be made smaller.

In addition, since the conveyor 21 inside the building can be raised and lowered, by raising and lowering it, the condenser tubes 15 can be directly conveyed to their mounting positions, which eliminates the need for a large-scale temporary frame.

Note that the present invention is not limited to the above embodiment.

For example, condenser tubes do not necessarily have to be carried in one by one, but a plurality of condenser tubes may be carried in packed.

Furthermore, the format and configuration of the tube loading pit, tube loading opening, etc. are not necessarily limited to those described above.

As described above, the present invention constructs a tube loading pit adjacent to the underground portion of the turbine building, and also forms a tube loading opening in the underground portion of the turbine building, and connects the condenser through the tube loading pit and the tube loading opening. Once the tubes have been brought in and installed, and the condenser main body components have been brought in, the condenser delivery opening in the turbine building, which was previously installed, will be constructed and closed to proceed with construction inside the building.

Therefore, the condenser tube delivery and installation work can proceed in parallel with the building construction work, and the long-term condenser naube delivery and installation work does not become a critical path, and the construction period can be significantly shortened. etc., the effect is a dog.

[Brief explanation of drawings]

FIGS. 1 and 2 are cross-sectional views illustrating a conventional method. 3 to 5 are diagrams explaining one embodiment of the present invention in the order of steps, in which FIG. 3a is a plan view, FIG. 3 is a vertical sectional view, FIG. 4a is a plan view, and FIG. Figure 4 is a longitudinal sectional view, and Figure 5 is a longitudinal sectional view.

Claims (1)

[Scope of Claims] 1. A part of the above-ground part of the turbine building that accommodates the turbine and the condenser is post-molded to form a condenser carrying-in opening for carrying in the condenser main body parts, and the underground part of the turbine building is forming a tube loading bit adjacent to the condenser tube loading pit, and forming a tube loading opening in the underground part of the turbine building corresponding to the tube loading pit; a step of carrying in the condenser body members and assembling the condenser body; a step of closing the condenser carry-in opening of the turbine building after the condenser body members are carried in; and the tube carrying-in pit and the tubes. A step of carrying in a condenser tube through the carry-in opening and attaching the condenser tube to the condenser body, and a step of closing the tube carry-in bit and the tube carry-in opening after the condenser tube has been carried in. A method for constructing turbine equipment, comprising: 2. In the process of carrying in and installing the condenser naube, the condenser tubes are carried in one by one by an in-pit conveyor provided in the tube carrying bit, and a building installed in the turbine building that can be raised and lowered freely. A patented method for constructing turbine equipment, which comprises transferring the product onto an indoor conveyor and moving it on the indoor conveyor to a condenser tube attachment position of the condenser main body.