JPH0130561Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is designed for the joint surface between the turbine casing and the partition plate that supports the nozzle, especially the joint surface between the geothermal turbine casing and the partition plate that supports the nozzle, and the joint surface between the casing of the geothermal turbine and the partition plate that supports the nozzle. This relates to the joint surface with the partition plate.

FIG. 1 shows a cross section of the fitting part between the casing 2 and the partition plate 1 of an early geothermal turbine manufactured.
In this case, there is a gasket 4 on one side of the fitting part.
is inserted, and the other side is the compartment 2 and the partition plate 1.
The two surfaces form a joint surface 3 that contacts each other. If the joint surface has this shape, the partition plate 1 and the casing 2 will stick together due to corrosion or scale clogging during regular inspections of the turbine, making it extremely difficult to remove the partition plate 1. be. Furthermore, the joint surface 3 between the passenger compartment and the partition plate causes erosion and corrosion, which creates gaps in the tight surface and reduces performance due to steam leakage, so it is necessary to repair or make a new partition plate at every regular inspection. becomes. As a countermeasure against these problems, seal rings 5 and 6 made of stainless steel as shown in Fig. 2 are installed on the partition plate 1.
At present, a structure is adopted in which the partition plate 1 and the compartment 2 are attached to the compartment 2, and the surface of the seal ring is the joint surface 3' to prevent steam leakage and to prevent the partition plate 1 and the compartment 2 from sticking together. However, this type has the disadvantage of being extremely expensive.

The present invention does not require the use of expensive seal rings (costing several million yen per unit) as described above, but instead uses inexpensive materials and can easily form a joint surface between the passenger compartment and the support plate. The purpose is to provide a structure for

Another object of the present invention is to provide a joint surface structure that does not rust and does not require repair.

The present invention will be described below with reference to the embodiments shown in FIGS. 3 and 4.

The surface of the partition plate 1 and the surface of the vehicle compartment 2 are subjected to surface treatment such as rust removal, and then approximately 0.1 mm of rust-preventive release paint is applied to form a rust-preventive release paint layer 7.
Approximately 0.3 inch of sealant is applied on top of this anti-rust release paint layer.
mm to form the sealant layer 8.

After providing the sealing material layer 8 in this manner, the compartment 2 and the partition plate 1 are fitted together. At this time, as best shown in FIG. 4, the sealing material layers are brought into direct contact with each other on one side to form a joint surface 3'', and a seal 4 is inserted between the surfaces on the opposite side of this joint surface. to complete the assembly.

The rust-preventing release paint layer 7 protects the substrates of the partition plate 1 and the vehicle compartment 2 from rust, and the sealing material layer 8 protects this rust-preventing release paint layer. Therefore, when removing the partition plate, only a small amount of force is required to release the partition plate from its base surface.

As described above, according to the present invention, a simple paint layer is applied without using a seal ring made of stainless steel as in the conventional case, and therefore the cost is much lower and the structure is also simplified. Moreover, due to the presence of the sealing material layer, a sealing performance superior to that of the conventional example shown in FIG. 1 is exhibited, and steam leakage is eliminated. Even easier to remove.

An example in which a joint surface having the above structure was applied to an actual geothermal turbine and its test results are as follows.

After removing rust and scale from the surface application area of the partition plate 1 with a wire brush, apply a paint (trade name: Pillcoat, manufactured by Usada Chemical) twice with a brush as the anti-rust release paint layer 7, and after drying, apply this paint. In order to protect the rust-preventing release paint layer, a sealant (trade name: Toshiba Silicone Tough Coat, manufactured by Toshiba Chemical) was applied twice with a brush as the sealant layer 8.

Similar treatment was applied to the surface of the compartment 2, and the compartment and partition plate were assembled and completed. The turbines manufactured in this manner showed no deterioration in sealing performance during regular inspection two years later, and due to the protection of the coating layer, good results were obtained, with no rust occurring.

In this way, according to the present invention, since the joining surfaces of the partition plate and the passenger compartment are coated with anti-corrosion release paint and sealant, the partition plate can be easily removed when the partition plate and the passenger compartment are connected. The material is erosion,
It does not suffer from corrosion. Therefore, during periodic inspections, it is necessary to simply apply anti-rust release paint or sealant to the surfaces of the vehicle interior and partition plates, and there is no need to repair or manufacture new ones, which is always economical.

In addition, the above-mentioned joint surfaces can also be applied to the joint surfaces of parts such as geothermal turbine gland sleeves and packing rings that need to be removed at regular inspections and are hard to remove because they are stuck with rust or scale. It is something.

[Brief explanation of the drawing]

FIGS. 1 and 2 are cross-sectional views of the fitting portion between the conventional compartment and the partition plate, FIG. 3 is a cross-sectional view of the fitting portion between the passenger compartment and the partition plate according to the present invention, and FIG. FIG. 4 is an enlarged sectional view of a joint surface in the fitting portion of FIG. 3; 1... Partition plate, 2... Vehicle interior, 3, 3', 3''...
Joint surface, 4... Packing, 5, 6... Rustless steel sealing, 7... Antirust release paint layer, 8... Sealing material layer.

Claims (1)

[Scope of utility model registration request] At the fitting part between the turbine casing and the partition plate that supports the nozzle, a rust-preventing release paint layer is provided on each surface of the casing and the partition plate, and a sealing material layer is further provided on top of that. A unique feature is the joint surface between the turbine casing and the partition plate.