JPH0742931B2 - Turbine installation method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for installing a water turbine.

[Conventional technology]

Prior to the description of the present invention, the order in which a water turbine is installed by a conventionally-used method will be described with reference to FIG. 5. The water turbine includes a water discharge pipe 1, and then a water discharge pipe 2.
Are installed in this order, and the joint a between the water discharge pipes 1 and 2 is welded and connected. When the joint portion a between the water discharge pipes 1 and 2 is welded and connected as described above, the reinforcement fitting 4 on the side of the foundation 3 and the reinforcement fitting 5 on the side of the water discharge pipe (in FIG. Only the case where the reinforcing metal fitting 5 is attached is shown, but actually, the reinforcing metal fitting 5 is also attached to the outer periphery of the water discharge pipe 1).
A welding connection is made at the intersection b. And then
The concrete is placed on the foundation 3, and the code c ₁ in FIG. 5 is the first concrete placement level, d ₁
Is the concrete pouring amount corresponding to level c ₁ , c ₂ is the second concrete pouring level, d ₂ is the concrete pouring amount corresponding to level c ₂ , c ₃ is the third concrete pouring level, d ₃ is the concrete pouring amount corresponding to level c ₃ ,
c ₄ is the fourth concrete pouring level, d ₄ is the level c ₄
The concrete pouring amount corresponding to is shown.

The reason for limiting the amount of concrete poured in one step to d ₁ , d ₂ , d ₃ and d _{4 as} described above is as follows.

That is, when the amount of concrete poured in one step becomes large (for example, reference numeral d ′ _{1 in} FIG. 5), large buoyancy acts on the water discharge pipes 1 and 2 during concrete pouring, and the water discharge pipes 1 and 2 are discharged. The installation position of may be different from the initial position.
Also, when a large amount of concrete is placed at one time, the amount of heat generated when the concrete solidifies also increases, and the thermal effects on the water discharge pipes 1 and 2 and the auxiliary equipment such as the reinforcing metal fittings 4 and 5 are also ignored. It becomes so large that it cannot be made, and if it is left unattended, the dimensions of each part will change greatly.

Therefore, in the conventional case, as described above, the number of times of placing concrete is divided into several times, and the amount of placing concrete per time is reduced to d ₁ , d ₂ , d ₃ and d _4. , While minimizing the buoyancy acting on the water discharge pipe 1 and other hydraulic machines,
Minimize the amount of heat generated during solidification of concrete,
The device is designed so that it does not actually hinder the installation of the water turbine.

[Problems to be Solved by the Invention]

However, in order to place the next concrete on the concrete that has been placed once, a curing period of usually 3 to 4 weeks is required, and during this period, the installation work of the water turbine must be interrupted. Under such circumstances, conventionally, it took a very long period from the installation work of the turbine to the completion of the construction, and the operation start time of the power plant has to be delayed accordingly.

It should be noted that Japanese Unexamined Patent Publication No. Sho
54-75030 gazette describes that "the entire turbine power generator is unitized in a factory, and this is brought into the field and installed". However, the turbine generator shown in the gazette is a small power generator. However, even if the technical content is examined, there is no description related to the method for installing a large water turbine to be solved by the present invention.

INDUSTRIAL APPLICABILITY The present invention can significantly shorten the construction period of a large-scale turbine, which conventionally required a very long period from installation and installation work of a turbine to completion of construction, and can accelerate the start-up timing of a power plant. It aims to provide a new method of installing a water turbine, which has never been seen in the past, which is excellent in both points.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention divides a member constituting a water turbine into a plurality of parts, covers each of the above-mentioned divided members with concrete except for a joint surface with another adjacent divided member, and A plurality of turbine blocks are formed by firmly adhering and integrating with concrete, and each turbine block is combined at the site of installation, fixing between adjacent turbine blocks and pouring concrete into the gap between the turbine blocks to allow each turbine block to flow. The feature is that they are integrated with each other.

[Action]

That is, according to the present invention, the member forming the water turbine is divided into a plurality of parts, each of the above-mentioned divided members is covered with concrete except the joint surface with another adjacent divided member, and each divided member and concrete. Are fixedly integrated to form a plurality of water wheel blocks.

Then, the above-mentioned water turbine blocks are assembled at the installation site, while fixing between adjacent water turbine blocks, concrete is poured into the gap between the above-mentioned water turbine blocks, and the water turbine blocks are integrated with each other by completing the installation of the water turbine. To do.

〔Example〕

Hereinafter, the present invention will be described based on an embodiment of FIGS. 1 to 4. FIG. 1 is a plan view of a water turbine installed by the method of the present invention, and FIG. 2 is A of FIG. FIG.

Therefore, in the illustrated embodiment, the order of installing the water turbines is performed from the water discharge pipe indicated by reference numeral 1 in FIG. 2 as in the conventional example shown in FIG. Except for the joint surface with other divided members adjacent to 1,
The concrete block 6 in which the reinforcing metal fitting 5 is embedded is pre-coated at the factory or the installation site,
The intersection e between the water discharge pipe 1 and the reinforcing metal fitting 5 is welded and connected before the outer circumference of the water discharge pipe 1 is covered with the concrete block 6.

The concrete block 6 configured as described above and the side of the foundation 3 are integrally connected, and the level of the concrete block 6 covering the water discharge pipe 1 is also accurately adjusted. Concrete block 6
The portion B of FIG. 2 is shown in an enlarged manner, exaggerating the case where the level adjustment of 1 has not been performed yet.

In FIG. 3, the reinforcing metal fitting 5 on the concrete block 6 side and the reinforcing metal fitting 4 on the foundation 3 side are provided to face each other, and the level plates 4a and 5a are respectively provided at the tips of the reinforcing metal fittings 4 and 5 described above. When the concrete block 6 is installed continuously and the installation level of the concrete block 6 is inclined as shown in FIG. 3, the turn bag 7 is rotated and the turn bag bars 8a and 8b are moved in the directions of arrows f ₁ and f ₂ , respectively. Let At this time, the other turn bag 9 is rotated to move the turn bag bars 10a and 10b in the directions of arrows g ₁ and g ₂ , respectively, whereby the inclination of the concrete block 6 is corrected.

The concrete block 6 covering the water discharge pipe 1 is integrally connected to the foundation 3 side as described above. Next, the installation of another water discharge pipe 2 following the water discharge pipe 1 will be explained. On the outer circumference of the water pipe 2, like the water discharge pipe 1,
The concrete block 11 in which the reinforcing metal fitting 5 is embedded is pre-coated at the factory or the installation site except for the joint surface with other division members adjacent to this, and the concrete block 11 configured as described above is Similar to the concrete block 6 described above, the level is accurately adjusted and the concrete block 6 side and the foundation 3 side are integrally connected. At this time, the water discharge pipe 1
The flange 1a and the flange 2a of the other water discharge pipe 2 are aligned with each other, and the flanges 1a and 2a are fastened with a bolt nut 12 in a state where the flange mating surface h is in close contact.

Here, the installation of the casing indicated by the reference numeral 13 in FIG. 2 will be described. The casing placed on the upper portion of the water discharge pipe 1.
In many cases, the casing 13 is usually divided into a plurality of parts. In the illustrated embodiment, as shown in FIG.
It shows a case where it is divided into two members 13 'and 13 ".
Similar to 1 and 2, the concrete blocks 14 'and 14 "in which the reinforcing metal fittings 5 are embedded are pre-coated at the factory or the installation site except for the joint surface with the other divided members adjacent to each other. Like the concrete blocks 6 and 11 described above, the concrete blocks 14 ′, 14 ″ are connected together by precise level adjustment, and at this time, the concrete blocks 14 ′, 14 ″ are also connected. ″ Is also integrally connected to the other divided members adjacent to each other.

A member denoted by reference numeral 15 in FIGS. 1 and 2 is a cotter interposed between the concrete blocks (gap i), and details thereof will be described with reference to FIG. That is, FIG. 4 is an enlarged view of a portion C of FIG.
When 15 is inserted and the cotter member 15a is pushed in the direction of the arrow j, the reinforcing effect between the reinforcing metal fittings 5 and 5 facing each other is firmly held by the gradient effect of the cotter members 15a and 15b. By interposing a required number of the above-mentioned cotters 15 in the gap i of each concrete block, it is possible to improve the proof stress of the entire water turbine against external force.

As described above, the concrete blocks are mutually integrated, and further, the concrete blocks located at the lowest position (in the illustrated embodiment, concrete blocks indicated by reference numerals 6 and 11 in FIG. 2) and the foundation 3 are integrally formed. Once connected, the concrete 16 (in the present invention, this concrete 16 is replaced with each water turbine block) between the concrete blocks 6 and 11 and between the concrete blocks 6 and 11 located at the lowest position and the foundation 3. Which is the outer cover of the concrete (in the illustrated embodiment, concrete blocks 6, 11, 1
2 for concrete materials that make up 4'and 14 "
Next, concrete is poured] to complete the installation of the water turbine. However, when pouring the secondary concrete 16, the casting amount of the secondary concrete 16 is small, and the weight of each concrete block outweighs the buoyancy of the secondary concrete 16. Two
There is no fear that the installation position of the hydraulic machine represented by will differ from the initial position. Also, since the amount of secondary concrete 16 placed is small compared to the total volume of each concrete block,
The amount of heat generated when the secondary concrete 16 is solidified is small, and the thermal influence on the water discharge pipes 1 and 2, the reinforcing metal fittings 4 and 5, etc. is suppressed to a small value that can be practically ignored.

〔The invention's effect〕

As is apparent from the description of the embodiments based on the drawings, according to the present invention, the amount of concrete (secondary concrete) that is required for assembling the turbine at the installation site is small, and the water discharge pipe 1 and Since buoyancy acting on hydraulic machinery such as 2 is small, and the amount of heat generated when the secondary concrete solidifies is small, this secondary concrete is placed in a single blow from the installation work of the conventional turbine to the completion of construction. The construction of large turbines, which required a very long period of time, can be significantly shortened, and the operation start time of the power plant can be shortened. It has excellent workability and economic efficiency. An installation method can be provided.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention, FIG. 1 is a plan view of a water turbine installed by the method of the present invention, and FIG. 2 is a sectional view taken along line AA of FIG. Fig. 3 is an enlarged view of part B of Fig. 2 exaggerating the case where the level adjustment of the turbine installation has not been performed yet, and Fig. 4 is C of Fig. 2 as well.
FIG. 5 is a partially longitudinal front view showing a state where the turbine is being installed by the conventional method. 1 ... water discharge pipe, 1a ... flange, 2 ... water discharge pipe, 2a ...
Flange, 3 ... Foundation, 4 ... Reinforcing metal, 4a ... Level plate, 5 ... Reinforcing metal, 5a ... Level plate, 6
…… Concrete block, 7 …… Turn backpack, 8a
And 8b ...... Turn back crowbar, 9 ...... Turn back bur, 10a and 10b ...... Turn back bur bar, 11 ...... Concrete block, 12 ...... Bolt nut, 13 ...... Casing, 13 'and 13 "...... Split casing, 14 ′ and 14 ″ …… Concrete block, 15 …… Kotter, 15
a and 15b …… Kotter member, 16 …… Concrete.

Claims (1)

[Claims] 1. A member constituting a water turbine is divided into a plurality of parts, each of the divided members is covered with concrete except for a joint surface with another adjacent divided member, and the divided members and the concrete are fixedly integrated. To form a plurality of water turbine blocks, combine the above water turbine blocks at the installation site, fix the adjacent water turbine blocks, and pour concrete into the gap between the above water turbine blocks to integrate the water turbine blocks. A method of installing a water turbine characterized by: