JPH05149107A - Integratedly assembled base floor of steam turbine - Google Patents

Abstract

PURPOSE:To facilitate field transportation of a turbine package provided in such way that a steam turbine is assembled integratedly with a frame shaped base floor, especially, a package of a large type steam turbine, and also reduce an installing man-hour when the steam turbine is installed at job site. CONSTITUTION:An exhaust pipe extending downward from a turbine casing is housed in a base floor 30 so as to eliminate the necessity of a transportation frame for protecting the exhaust pipe. A hanger of a turbine is used so as to eliminate the necessity to provide a hanger for a turbine package on the base floor 30. Furthermore, oil piping systems 33 to 36 provided around the turbine are arranged in space formed in at least one of the outside surfaces around the base floor 30 so as to reduce the width of the base floor 30 to enable transportation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an integrated assembly floor of a steam turbine for integrally assembling the steam turbines, transporting them as they are and installing them.

[0002]

2. Description of the Related Art In order to facilitate the on-site installation of a steam turbine and reduce the number of installation steps, conventionally, a steam turbine was integrally assembled on a floor with a main steam stop valve, a steam control valve, etc. at a factory. A turbine package is formed, this turbine package is transported to the site as it is, and the turbine package is installed on the local foundation to install the steam turbine.

By the way, conventionally, this type of turbine package normally uses a simple base, and suspenders are provided on both sides of the base, and the suspenders are used for transportation, hoisting, and hanging during installation. A turbine package shown in FIG. 4 and a side view of FIG. 4 is known as this type.

In FIGS. 4 and 5, a steam turbine 1 comprises a high pressure turbine 2, a low pressure turbine 3 and a front bearing stand 4 and a rear bearing stand 5 for supporting a turbine rotor. A main steam stop valve 7, a plurality of steam control valves 8 and an extraction control valve 9 are attached.

Such a steam turbine 1 has a front installation base 1
1 and is installed and assembled on a floor 13 having a rear mounting base 12. Here, the front bearing base 4 on which the cat feet of the high-pressure casing 6 of the high-pressure turbine 2 are supported is mounted on the front mounting base 11, while the low-pressure casing 15 of the low-pressure turbine 3 is mounted on the rear mounting base 12, whereby the steam turbine is installed. Assembled.

An exhaust pipe 16 which is connected to the low-pressure casing 15 and through which exhaust steam from the turbine is guided projects downward from the lower surface of the base 13 to which suspenders 17 are attached on both sides. This is because the pedestal 13 needs to have high rigidity and becomes heavy in order to lift the pedestal 13, and therefore the height of the pedestal 13 is made as low as possible in consideration of weight reduction and stability during turbine operation.

Numerals 18 and 19 are suspenders provided in the high-pressure casing 6 and the low-pressure casing 15, respectively, and 20 is a turning device.

The oil pipes 21 and 22 are pipes for supplying / discharging oil to / from the front and rear bearing pedestals 4,5, a control device (not shown), a bearing pedestal of a generator (not shown) connected to the steam turbine, and the like. It is supported by supports 23 projecting from both side surfaces of the floor 13 and arranged outside the suspenders 17.

Here, the turbine package is composed of a steam turbine 1 provided with valves such as a main steam stop valve 7, a steam control valve 8 and the like installed on a bed 13, and oil pipes 21 and 22.

With such a structure, when the turbine package is transported, the exhaust pipe 16 is lifted up and down by the suspending tool 17 and projects downward from the floor 13.
In order to protect the vehicle, the base 13 of the turbine package is placed on a transportation stand (not shown), mounted on a trailer, transported, and shipped to the site. Then, the foundation 2 in which the turbine package is hung up and hung down and the hole 24 is provided
5 installs the base 13 and installs the turbine package.

In the turbine package described above, the oil pipes 21 and 22 are attached to the base 13, but the base 1
It is also known to dispose it separately from the base 13 without mounting it on the base 3. In this case, the oil pipes 21, 22 and the like are transported to the site by means other than the turbine package.

As the turbine package as described above,
The oil pipe is not attached to the base, and the base is composed of the upper base for installing the turbine and the lower base that houses the exhaust pipe protruding downward from the upper base as described above. It is known to transport a turbine package that is a combination of a lower mount and a lower mount, and install the steam turbine by disconnecting the lower mount from the upper mount on site (Patent Publication 3-
36124).

[0013]

When the turbine package as described above is to be transported locally, the floor width of the turbine package must be less than the transportable width of the trailer from the viewpoint of transportation. By the way, since the platform 17 is provided with the suspenders 17 on both sides thereof, the oil pipes are attached to the suspenders 1.
7, the width of the pedestal 13 of the turbine package becomes large due to the oil piping, and there is a problem that the trailer is limited in width particularly in a large steam turbine, so that it cannot be transported. ..

Further, since the exhaust pipe 16 projects from the lower surface of the bed 13, there is a drawback that the transportation stand for protecting the exhaust pipe is required as described above.

It should be noted that when the oil pipes are arranged separately from the turbine package, the width of the bed of the turbine package can be made large enough to be transported locally, but the oil pipes must be transported locally by another means. There is a drawback that the installation man-hours of oil piping on the site increase.

Further, according to Japanese Examined Patent Publication No. 3-36124, a lower mount for transportation is required at the time of local transportation, and the oil pipe around the turbine must be transported by another means.

It is an object of the present invention to provide an integrally assembled floor of a steam turbine in which the width of the floor of the turbine package is not more than a transportable size even if the steam turbine becomes large, and a transportation platform is not required. Is.

[0018]

In order to solve the above-mentioned problems, according to the present invention, in an integrally assembled pedestal that is equipped with a valve for guiding steam and is capable of integrally assembling and transporting a steam turbine, the pedestal is: An oil piping system that extends downward from the turbine casing and has a height that positions the lower end surface of the exhaust pipe that guides the exhaust steam from the turbine above the lower surface of the bed, and that supplies and discharges oil to the turbine in the bed. It shall be constructed by providing an installation space for installing.

The bed is connected to the frame-shaped upper plate having a mounting portion for mounting the steam turbine, the frame-shaped base plate installed on the foundation, the upper plate and the base plate, and the exhaust pipe. A vertical plate having a plate-like shape or a step having a height such that the lower end surface thereof is positioned higher than the lower surface of the base plate.

The installation space for installing the oil piping system is a space of at least one outer side surface of the outer side surface of the periphery defined by the upper plate, the base plate and the vertical plate.

[0021]

The steam turbine is equipped with a main steam stop valve for guiding steam and a steam control valve, and is integrally assembled to be installed on the installation portion of the floor. At this time, the bed has a height that extends downward from the turbine casing and that positions the lower end surface of the exhaust pipe that guides the exhaust steam from the turbine above the lower surface that is in contact with the foundation of the bed. Are housed in the pedestal. Therefore, a transportation stand for protecting the exhaust pipe during transportation is unnecessary.

The bed is a frame-shaped upper plate having a mounting portion for mounting the steam turbine, a frame-shaped base plate installed on the foundation, and a flat plate-shaped plate connected to the upper plate and the base plate. A vertical plate or a vertical plate having a step. Here, the height of the vertical plate can be made higher than before without increasing the weight by shortening the length of the exhaust pipe as compared with the conventional one and further providing the support rigidity and stability required for the base. The height of the lower end surface of the exhaust pipe can be set so as not to protrude below the base plate.

When the steam turbine integrally assembled on the bed is to be transported locally, the bed is provided with a hanger by hoisting and hanging with a hanger normally provided for the high-pressure turbine and the low-pressure turbine. There is no need. Therefore, the oil piping system that supplies and discharges oil to and from the steam turbine is composed of at least one outer surface of the four outer surfaces of the base defined by the frame-shaped upper plate of the base, the frame-shaped base plate, and the vertical plate. It can be arranged in space. For this reason, the oil piping system does not protrude from the outer shape of the base, so that the width of the base is shorter than in the conventional case, and the transportation by the trailer becomes possible.

When using a vertical plate having a step,
Since the space defined by the low vertical plate part due to the step becomes wider,
Large diameter oil pipes can be easily arranged.

[0025]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a steam turbine assembled on an integrally assembled floor according to an embodiment of the present invention, and FIG. 2 is a side view of FIG. 1 and 2, the same parts as those of the conventional example of FIGS. 4 and 5 are designated by the same reference numerals, and the description thereof will be omitted. 1 and 2 are different from the conventional example in that the length of the exhaust pipe 16 extending downward from the turbine casing is shorter than that of the conventional one, and the height of the frame-shaped base 30 is set so that the lower end surface of the exhaust pipe 16 is a base 25. The height is set higher than the lower surface of the base plate 31 of the pedestal 30 installed on the floor, and the installation space 32 provided on both outer sides around the pedestal 30 has a bearing stand for the steam turbine and the generator. Oil pipes 33, 34, 35, 36 for supplying and discharging oil by connecting to a control device or the like and an oil collecting tank 38
Is provided by being supported by the support tool 45 or the like. An oil pipe (not shown) is also provided in the installation space 32a provided on the front surface of the base 30.

As shown in FIG. 3, the pedestal 30 includes a frame-shaped upper plate 40 having an installation portion for installing the steam turbine 1, and a foundation 2
It is formed by a frame-shaped base plate 31 installed in 5, and a vertical plate 39 connected to the upper plate 40 and the base plate 31. Here, the upper plate 40 is provided with a front mounting base 42 for mounting the front bearing base 4 on which the cat feet of the high-pressure casing 6 of the steam turbine 1 are supported and a rear mounting base 43 for mounting the low-pressure casing 15. ..

Here, the installation spaces 32 and 32a are spaces on both side surfaces and a front surface defined by the upper plate 40, the base plate 31, and the vertical plate 39, respectively. The vertical plate 39 that defines the installation space 32 on both sides is formed by a step vertical plate 39a and vertical plate portions 39b and 39c connected to the step vertical plate 39a, and the space defined by the vertical plate portion 39b has a different diameter. The large diameter oil pipe 34 and the oil collecting tank 38 of the pipes are installed, and the small diameter oil pipes 33, 35, 36 are installed in the space defined by the vertical plate portion 39c.

With such a construction, the exhaust pipe 16 extending downward from the turbine casing does not project from the lower surface of the floor 30, and the oil pipes 34 to 36 around the turbine for supplying and discharging oil to the steam turbine and the like, and the oil collecting unit. An oil pipe system such as a tank 38 is installed in the installation space 32 in the base 30, and an oil pipe (not shown) is installed in the installation space 32a, and the steam turbine is equipped with an oil pipe system around the turbine to be integrated with the base 30. Assembled. Therefore, the turbine package of the steam turbine in the integrally assembled state is mounted on the trailer as it is, transported, and installed on the local foundation as it is.

When hoisting and hanging the turbine package, hoists 18 and 19 provided on the high-pressure turbine 2 and the low-pressure turbine 3 are used.

In this embodiment, the vertical plates 39 provided on both side surfaces of the bed 30 are vertical plates having step vertical plates 39a. However, when the oil pipes have the same diameter, the vertical plates 39 are May have a flat plate shape without providing the step vertical plate 39a.

Further, in this embodiment, the installation space is provided on the front surface and both side surfaces of the base 30, but the installation space may be provided on the rear surface.

[0032]

As is apparent from the above description, according to the present invention, the frame-shaped bed for integrally assembling the steam turbine is
The exhaust pipe that extends downward from the turbine casing has a height that does not protrude from the bottom surface of the base, and is formed without any suspenders on the base to form an installation space within the base and the outer surface around the base. By arranging the oil piping system around the turbine in the installation space of at least one outer surface of the steam turbine, the floor width of the steam turbine can be reduced even with a large steam turbine, so it becomes possible to transport a steam turbine, especially a large steam turbine. In addition, since it can be transported locally without the need for a transportation platform that protects the exhaust pipe as in the past, it is possible to install the steam turbine assembled on the floor with oil piping on the local foundation as it is,
The man-hours for installing the steam turbine can be shortened.

[Brief description of drawings]

FIG. 1 is a front view of a steam turbine assembled on a batch assembly floor according to an embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a perspective view of the collective assembly floor of FIG.

FIG. 4 is a front view of a steam turbine assembled on a conventional batch assembly bed.

5 is a side view of FIG.

[Explanation of symbols]

 1 Steam Turbine 13 Bed 16 Exhaust Pipe 25 Foundation 30 Bed 31 Base Plate 32 Installation Space 32a Installation Space 39 Vertical Plate 40 Upper Plate

Claims (3)

[Claims] 1. A monolithic pedestal having a steam guiding valve for integrally assembling and transporting a steam turbine, wherein the pedestal extends downwardly from a turbine casing and is provided with an exhaust pipe for guiding exhaust steam from the turbine. A steam turbine characterized in that the lower end surface is provided with a height higher than the lower surface of the base, and an installation space for installing an oil piping system for supplying and discharging oil to and from the turbine is provided in the base. Integrated assembly floor. 2. The integrated assembly floor of the steam turbine according to claim 1, wherein the floor has a frame-shaped upper plate having a mounting portion for mounting the steam turbine, and a frame-shaped base plate installed on a foundation.
Steam comprising a flat plate-like vertical plate or a vertical plate having a step connected to an upper plate and a base plate and having a height for positioning the lower end surface of the exhaust pipe above the lower surface of the base plate. Turbine integrated assembly floor. 3. The integrated assembly floor of a steam turbine according to claim 1 or 2, wherein the installation space is a space defined by an upper plate, a base plate and a vertical plate, and is a space of at least one outer surface portion on the periphery. An integrated assembly floor of a steam turbine, which is characterized in that