JP3538966B2 - Fluid supply device for cleaning - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning fluid supply apparatus for supplying a working fluid for efficiently cleaning an object to be cleaned such as a gas turbine used in an airplane or the like.

[0002]

2. Description of the Related Art In general, in a gas turbine or the like used in an aircraft, dust, salt, or the like may enter the inside of the apparatus, causing troubles such as corrosion of the apparatus, operation failure, and the like. A working fluid such as air is supplied to periodically clean the inside of the apparatus.

[0003]

By the way, in the above-mentioned gas turbine, a working fluid such as washing water or compressed air is supplied into the gas turbine by switching an electric switching means such as an electromagnetic valve. Thus, the existence of such an electric switching means has caused a problem that a special electric system and operation are required.

The present invention has been made in view of the above circumstances, and can supply a working fluid such as washing water or compressed air without using an electrical switching means such as a solenoid valve. Accordingly, it is an object of the present invention to provide a cleaning fluid supply device which does not require any special electric system and operation system for operating the electromagnetic valve, and can simplify the configuration.

[0005]

According to a first aspect of the present invention, a first supply pipe for supplying a working fluid is provided in a main pipe connected to an object to be cleaned such as a gas turbine. And a flow path switching valve connected together with a second supply pipe to which the switching fluid is supplied, wherein the flow path switching valve is not supplied with the switching fluid from the second supply pipe. A switch for connecting the first supply pipe to one of the main pipes by disposing the main pipe at a connection position connecting the main pipes to each other and disconnecting the main pipe when the switching fluid is supplied from the second supply pipe; A piston disposed at a position is provided.

[0006] In the second invention, the flow path switching valve is provided with an urging means for urging a piston toward a connection position for connecting the main pipes to each other, and the second supply pipe is provided on the piston. A piston pressing plate for receiving the supply pressure of the switching fluid when the switching fluid is supplied from, and moving the piston from the connection position toward the switching position against the urging force of the urging means; Is provided.

In the third invention, a passage leading to the first supply pipe is formed in the valve body of the passage switching valve, and in the middle of the passage, the passage is opened and closed, and the passage is opened and closed. A dump valve urged by urging means in a closing direction is provided, and the passage is arranged so as to communicate with one of the main pipes when the piston is arranged at the switching position. In the valve, when the piston is arranged at the switching position, the flow path is communicated with one of the main pipes, and when the working fluid is supplied into the passage through the first supply pipe, A dump valve pressing plate for receiving the supply pressure of the working fluid and opening the flow path against the urging force of the urging means is provided.

[0008]

According to the first aspect of the present invention, a flow path switching valve is provided in the middle of a main pipe connected to a device such as a gas turbine, and a piston in the flow path switching valve is used for switching from a second supply pipe. When the fluid is not supplied, the main pipes are connected to each other, and when the switching fluid is supplied from the second supply pipe, the connection of the main pipe is cut off, and the first supply pipe and one of the main pipes are disconnected. Was connected. That is, in the cleaning fluid supply device of the present invention, the first supply pipe is connected to the main pipe by the fluid pressure of the switching fluid supplied through the second supply pipe, and the cleaning is performed inside the gas turbine or the like through the main pipe. Since a working fluid such as water or compressed air is supplied, if an existing compressed air source is used for the switching fluid, a special electric system and operating system for operating the solenoid valve as in the past will be required. There is no need to provide.

In the cleaning fluid supply apparatus according to a second aspect of the present invention, the piston is urged toward the connection position where the main pipes are connected to each other by the urging force of the urging means, and the switching fluid is supplied from the second supply pipe. Is supplied, the piston press plate provided on the piston receives the supply pressure of the switching fluid, and moves the piston from the connection position toward the switching position against the urging force of the urging means. So that
With such a piston pressing plate and biasing means, the piston is moved between a connection position where the main pipe is connected to each other and a switching position where the connection of the main pipe is disconnected and one of the first supply pipe and one of the main pipes is connected. Can be moved smoothly.

In the cleaning fluid supply device according to a third aspect of the present invention, a dump valve energized by urging means in the direction of closing the flow passage while opening and closing the flow passage is provided in the middle of the passage of the valve body. This dump valve is provided when the piston is arranged at the switching position so that the flow path is communicated with one of the main pipes, and the working fluid is supplied into the passage through the first supply pipe. If done,
Receiving the supply pressure of the working fluid with a dump valve pressing plate,
The channel is opened against the urging force of the urging means. Then, by the operation of the dump valve, when the piston is arranged at the switching position, the working fluid can be reliably supplied from the first supply pipe toward one of the main pipes.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. In FIG. 1, reference numeral 1 denotes a gas turbine used for an aircraft, and a compressor denoted by reference numeral 1A.
It comprises a combustor indicated by reference numeral 1B and a turbine indicated by reference numeral 1C. In this gas turbine 1,
An air bleed valve 3C is provided at a middle position of the casing of the compressor 1A to reduce the load during start-up and at the time of low-speed ground idle to prevent a surge from occurring during operation. The air bleed valve 3C is set so that, when the gas turbine 1 rotates, when the high-pressure bleed gas taken in from the rear stage position of the compressor 1 becomes higher than a predetermined pressure, the air bleed valve changes from an open state to a closed state. Have been.
On the other hand, a piping system 2 is provided in the gas turbine 1, and the piping system 2 has a plurality of main pipings 3 (3A, 3A, 3B) for guiding the extracted gas discharged from the gas turbine 1 again into the gas turbine 1. 3B) and 4 (comprising 4A and 4B). In these main pipes 3 and 4,
During the operation of the gas turbine 1, the extracted gas is circulated as shown in FIG. Although not particularly shown, the extracted gas circulated in the main pipes 3 and 4 is, for example, used for preventing freezing of equipment in the gas turbine 1, cooling,
Used for various applications such as pressure regulation.

On the other hand, flow path switching valves 5 and 6 are provided in the main pipes 3 and 4 respectively. Since these flow path switching valves 5 and 6 have substantially the same configuration, the flow path switching valve 5 will be described with reference to FIGS.
First, in these figures, what is indicated by reference numeral 7 is a valve body, and a cylinder portion 8 in the valve body 7 is provided with pipes 3A and 3B constituting the pipe 3, a working fluid supply for supplying a working fluid. A pipe 9 and a switching fluid supply pipe 10 to which a switching fluid is supplied are connected.

In the flow path switching valve 5, the working fluid and the switching fluid supplied through the working fluid supply pipe 9 and the switching fluid supply pipe 10, respectively, are supplied from an existing air source 50 through a pipe 51. Is done. In the flow path switching valve 6, the switching fluid supplied through the switching fluid supply pipe 10 is supplied from the air source 50 through the pipe 51. The supply of air from the air source 50 to the flow path switching valves 5 and 6 is performed by an operator opening the on-off valve 52. In the flow path switching valve 6, instead of the air supplied from the working fluid supply pipe 9, flush water is supplied from a pipe 54 externally connected via a coupling 53 through the working fluid supply pipe 25. It has become so.

A piston 13 is provided in the cylinder portion 8 so as to be movable in the directions of arrows AB. Piston 13
Is urged in the direction of arrow B by the spring 11 and is urged in the direction of arrow A by the spring 12. The urging force of the spring 11 is
The piston 13 is biased in the direction of arrow B as a whole. Further, the piston 13 has an end on the arrow A side to be brought into contact with the flow path opening 14 connected to the pipe 3A. The supply of the extracted gas from 3A is stopped (see FIG. 4).
Further, a passage 15 is formed inside the piston 13, and a poppet 16 fixed to the valve body 7 along the arrow AB direction is disposed inside the passage 15. The poppet 16 has a tapered portion 16a
When the piston 13 moves in the direction of arrow A, the tapered portion 16a contacts the step 15a of the passage 15 to close the passage 15 (see FIG. 4), and the piston 13 Is moved in the direction of arrow B, the tapered portion 16a separates from the step 15a of the passage 15 to open the passage 15 (see FIG. 3).

On the other hand, the switching fluid supply pipe 10 to which the switching fluid is supplied is connected to an arrow B side of a piston pressing plate 17 formed on a peripheral portion of the piston 13,
Due to the supply pressure of the switching fluid supplied from the switching fluid supply pipe 10, the piston 13 is moved in the direction of arrow A against the urging force of the spring 11, whereby the pipe 3A
The flow path opening 14 connected to the opening is closed (see FIG. 4). The working fluid supply pipe 9 to which the working fluid is supplied is provided at a position near the pipe 3 </ b> B, and the terminal opening of the passage 18 of the cylinder portion 8 communicating with the working fluid supply pipe 9. 19 is closed by the end of the piston 13 when the piston 13 moves in the direction of arrow B (see FIG. 3), and is opened when the piston 13 moves in the direction of arrow A, and is connected to the pipe 3B. (See FIG. 4).

On the other hand, a dump valve 21 movably in the direction of arrow CD and urged in the direction of arrow C by a spring 20 is provided in the middle of the passage 18 of the cylinder portion 8 communicating with the working fluid supply pipe 9. Is provided. This dump valve 21 is moved within the range shown by the arrow L along the inner wall of the passage 18 of the cylinder portion 8 as shown in detail in FIGS. 3, the passage 18 is closed by closing the hole 22 of the dump valve 21 (see FIG. 3,
In addition, when the spring 18 is disposed on the side of the arrow D against the urging of the spring 20, the hole 22 of the dump valve 21 is opened to open the passage 18 (FIG. 4). , FIG. 6).

The dump valve 21 has a passage 1
A dump valve pressing plate 23 is provided so as to traverse 8. This dump valve pressing plate 23 is
Moves in the direction of arrow A and is connected to the working fluid supplied through the passage 18 when the terminal opening 19 of the passage 18 is connected to the pipe 3B. Pressing the fluid moves the entire dump valve 21 in the direction of arrow D, thereby opening the hole 22 and opening the passage 18 (FIGS. 4 and 6). In FIG. 3 and FIG. 4, an orifice indicated by reference numeral 24 is an orifice for applying atmospheric pressure.
When the end opening 19 of the nozzle 8 and the pipe 3B are not connected, the dump valve 21 is moved by the arrow C by the atmospheric pressure applied through the orifice 24 and the urging force of the spring 20.
(See FIGS. 3 and 5).

Next, the operation of the cleaning fluid supply device configured as described above will be described. (1) FIGS. 1 and 3 show a state in which the gas turbine 1 is operating. At this time, the on-off valve 52 is closed and the switching fluid supply pipe 10 is supplied with the switching fluid. Because there is no piston 11, the piston 13 moves to the arrow B side by the urging force of the spring 11, whereby the pipe 3A and the pipe 3B are connected to each other via the passage 15 in the piston 13. (2) Then, in this state, the opening / closing valve 52 is opened to supply the working fluid through the working fluid supply pipe 9,
When the switching fluid is supplied through the switching fluid supply pipe 10, the switching fluid is supplied to the piston pressing plate 1 of the piston 13.
7 is pressed in the direction of arrow A, whereby the piston 13 moves toward the arrow A against the urging force of the spring 11 as shown in FIG. As a result, the tip of the piston 13 on the arrow A side contacts the flow path opening 14 connected to the pipe 3A, and the tapered portion 16a of the poppet 16 contacts the step portion 15a of the passage 15, whereby the passage 15 The piping 3A and the piping 3B connected via are disconnected.

(3) When the piston 13 moves to the arrow A side as shown in FIG. 4, the terminal opening 19 of the passage 18 leading to the working fluid supply pipe 9 is communicated with the pipe 3B. By this communication, the working fluid supplied through the working fluid supply pipe 9 is transferred to the dump valve pressing plate 23.
To move the dump valve 21 in the direction of arrow D against the urging force of the spring 20. As a result, the hole 22 of the dump valve 21 is opened as shown in FIG.
8 is opened. Then, by the opening of the passage 18, the working fluid is supplied from the working fluid supply pipe 9 into the gas turbine 1 through the pipe 3B as shown in FIG.

In the above example, by opening the open / close valve 52, the flow path switching valve 5 is switched to connect the working fluid supply pipe 9 to the pipe 3B. Although the working fluid (air in this case) is supplied into the gas turbine 1 through the pipe 3B, the switching of the flow path switching valve 6 is performed in the same manner as the flow path switching valve 5. That is, as shown in FIG.
A pipe 54 to which the cleaning water is supplied is externally connected in advance, and in this state, as described above, the open / close valve 52
Is opened, the switching fluid is supplied to the flow path switching valve 6 through the switching fluid supply pipe 10, and the connection between the pipes 4A and 4B is disconnected by the switching fluid.
And the pipe 4B and the working fluid supply pipe 25 are connected,
Thus, the working fluid (in this case, washing water) is supplied into the gas turbine 1 through the working fluid supply pipe 25 and the pipe 4B. By the operation of the flow path switching valves 5 and 6 as described above, a working fluid including air and cleaning water is supplied into the gas turbine 1, and the working fluid is used to wash away dirt in the gas turbine 1. Can be. Further, when the inside of the gas turbine 1 is cleaned by switching the flow path switching valve 6, the cleaning water may flow out from the air bleed valve 3C to drive the gas turbine 1 in a low rotation range. Therefore, in order to prevent such a situation, when switching the flow path switching valve 6 to clean the inside of the gas turbine 1, the air extraction valve 3C is closed in advance.

In the above embodiment, the flow path switching valve 5
In 6, the case where the working fluid supply pipes 9 and 25 to which the working fluid is supplied are connected to the pipes 3B and 4B has been described. The supply of the switching fluid to the switching fluid supply pipe 10 may be stopped by closing the valve 52. That is, if the supply of the switching fluid to the switching fluid supply pipe 10 is stopped by closing the opening / closing valve 52, the piston 13 moves in the direction of arrow B by the urging force of the spring 11, whereby the flow path is switched. In the valve 5, the connection between the working fluid supply pipe 9 (for bleed gas) and the pipe 3B is disconnected, and then the pipes 3A and 3B are connected. After the connection between the supply pipe 25 (for cleaning water) and the pipe 4B is disconnected, the pipes 4A and 4B
Is connected, whereby the circulation of the extracted gas in the main pipes 3 and 4 as shown in FIG. 1 becomes possible.

As described above in detail, in the cleaning fluid supply apparatus according to the present embodiment, the flow path switching valves 5.6 are provided in the middle of the main pipes 3, 4 connected to the gas turbine 1, and the flow path switching valves 5.6 are provided. When the switching fluid is not supplied from the switching fluid supply pipe 10 by the switching valves 5 and 6, the pipes 3A and 3B and the pipes 4A and 4B are connected to each other as shown in FIGS. On the other hand, when the switching fluid is supplied from the switching fluid supply pipe 10, as shown in FIGS.
And 3B, the pipes 4A and 4B are disconnected, and the working fluid supply pipe 9 (in the case of the valve 5, for bleed gas) and the pipe 3
B, the working fluid supply pipe 25 (in the case of the valve 6: for washing water) and the pipe 4B were connected to each other. That is, in the cleaning fluid supply device shown in the present embodiment, the switching supplied through the switching fluid supply pipe 10 is performed in the flow path switching valves 5 and 6 provided in the main pipes 3 and 4 connected to the gas turbine 1. The working fluid supply pipes 9, 25, to which working fluids such as bleed gas and cleaning water are supplied, are connected to the pipes 3B, 4B by the fluid pressure of the working fluid, respectively,
The working fluid can be supplied into the gas turbine 1 through these pipes 3B and 4B. Therefore, if an existing compressed air source is used as the switching fluid, a special fluid for operating the solenoid valve as in the related art is used. The electric system and the operation system are not required, and the configuration can be prevented from becoming complicated.

In the above embodiment, the gas turbine of an airplane is taken as an example of the object to be cleaned. However, the present invention is not particularly limited to this. For example, the cleaning of the internal device (the object to be cleaned) of a large vehicle such as a tank or a truck. It may be used for. In the above-described embodiment, the working fluid supply pipes 9 are connected to the pipes 3B and 4B in the flow path switching valves 5 and 6, respectively. However, the present invention is not limited to this, and the pipes 3A and 3B are interchanged. The pipes 4A and 4B may be exchanged, and the connection form of the pipes to the flow path switching valves 5 and 6 can be arbitrarily changed. In the above embodiment, the springs 11, 12, and 20 are used as the urging means. However, the present invention is not limited to this, and rubber may be used as the urging means.

In the above embodiment, the positions in FIGS. 1 and 3 correspond to the "connection position" in the claims.
The position shown in FIG. 4 corresponds to the “switching position” in the claims. In the above embodiment, the flow path switching valve 5
6 constitutes a “flow path switching valve” of the claims, the working fluid supply pipes 9 and 25 constitute a “first supply pipe”, and the switching fluid supply pipes 10 constitute a claim. A "second supply pipe" is configured. The springs 11 and 12 for urging the piston 13 constitute an "urging means" according to the second aspect of the present invention, and the spring 20 for urging the dump valve 21 provides a third aspect of the present invention. Are formed.

[0025]

As is clear from the above description, in the cleaning fluid supply device according to the first invention, a flow switching valve is provided in the middle of a main pipe connected to a device such as a gas turbine. The main pipes are connected to each other by the piston in the passage switching valve when the switching fluid is not supplied from the second supply pipe, and the main pipe is connected when the switching fluid is supplied from the second supply pipe. By disconnecting the connection, the first supply pipe was connected to one of the main pipes. That is, in the cleaning fluid supply device of the present invention, the first supply pipe is connected to the main pipe by the fluid pressure of the switching fluid supplied through the second supply pipe, and the inside of a gas turbine or the like is passed through the main pipe.
Since the working fluid such as cleaning water and compressed air is supplied, if an existing compressed air source is used for the switching fluid, a special electric system for operating the solenoid valve as in the related art,
There is no need to provide an operation system, and it is possible to prevent the configuration from becoming complicated.

In the cleaning fluid supply apparatus according to the second aspect of the present invention, the piston is urged toward the connection position where the main pipes are connected to each other by the urging force of the urging means, and the switching fluid is supplied from the second supply pipe. Is supplied, the piston press plate provided on the piston receives the supply pressure of the switching fluid, and moves the piston from the connection position toward the switching position against the urging force of the urging means. So that
With such a piston pressing plate and biasing means, the piston is moved between a connection position where the main pipe is connected to each other and a switching position where the connection of the main pipe is disconnected and one of the first supply pipe and one of the main pipes is connected. Can be moved smoothly.

In the cleaning fluid supply device according to a third aspect of the present invention, a dump valve energized by urging means in the direction of closing the flow passage while opening and closing the flow passage is provided in the middle of the passage of the valve body. This dump valve is provided when the piston is arranged at the switching position so that the flow path is communicated with one of the main pipes, and the working fluid is supplied into the passage through the first supply pipe. If done,
Receiving the supply pressure of the working fluid with a dump valve pressing plate,
The channel is opened against the urging force of the urging means. Then, by the operation of the dump valve, when the piston is located at the switching position, it is possible to reliably supply the working fluid from the first supply pipe toward one of the main pipes.

[Brief description of the drawings]

FIG. 1 is a piping diagram showing a flow of a bleed gas during operation of a gas turbine.

FIG. 2 is a piping diagram showing flows of a switching fluid and a working fluid when cleaning a gas turbine.

FIG. 3 is a front sectional view showing the position of a piston of a flow path switching valve during operation of the gas turbine.

FIG. 4 is a front sectional view showing the position of a piston of a flow path switching valve when cleaning the gas turbine.

FIG. 5 is a diagram showing a position of a dump valve during operation of the gas turbine.

FIG. 6 is a diagram showing the position of a dump valve when cleaning a gas turbine.

[Explanation of symbols]

1 gas turbine (object to be cleaned) 3 (3A / 3B) Main piping 4 (4A ・ 4B) Main piping 5 Flow path switching valve 6 Flow path switching valve 7 Valve body 9 Working fluid supply pipe (first supply pipe) 10 Fluid supply pipe for switching (second supply pipe) 11 spring (biasing means) 12 spring (biasing means) 13 piston 17 Piston pressing plate 18 Channel 20 spring (biasing means) 21 Dump valve 23 Dump valve pressing plate 25 Working fluid supply pipe (first supply pipe)

Claims (3)

(57) [Claims] A first supply pipe (9) to which a working fluid is supplied and a switching fluid to be supplied in the middle of a main pipe (3A, 3B) connected to an object to be cleaned such as a gas turbine. Second
A flow path switching valve (5) connected to the supply pipe (10) is disposed, and the main pipe is connected to the flow path switching valve when the switching fluid is not supplied from the second supply pipe. And a piston disposed at a switching position for disconnecting the main pipe when the switching fluid is supplied from the second supply pipe and connecting the first supply pipe to one of the main pipes. (1
(3) A cleaning fluid supply device, wherein (3) is provided. 2. The flow path switching valve, comprising: urging means (11, 12) for urging a piston toward a connection position for connecting main pipes to each other; and the second supply provided to the piston. When the switching fluid is supplied from the pipe, it receives the supply pressure of the switching fluid and resists the urging force of the urging means.
The cleaning fluid supply device according to claim 1, further comprising a piston pressing plate (17) for moving the piston from the connection position toward the switching position. 3. The valve body (7) of the flow path switching valve.
A passage (18) communicating with the first supply pipe is formed in the passage, and in the middle of this passage, the passage is opened and closed and urged by urging means (20) in a direction to close the passage. A dump valve (21) is provided, wherein the passage is arranged to communicate with one of the main pipes when the piston is arranged at the switching position, and the piston is arranged at the switching position at the dump valve. In the case where the flow path is communicated with one of the main pipes by being disposed, and when the working fluid is supplied into the passage through the first supply pipe, the supply pressure of the working fluid is received. 3. The cleaning fluid supply device according to claim 2, further comprising a dump valve pressing plate (23) for opening the flow passage against the urging force of the urging means.