JP4417015B2 - Water turbine equipment having siphon-type suction channel and operation method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a suction pipe of a water turbine (in this specification, the names of “suction” and “discharge” are fixedly used in the manner of the water turbine operation, regardless of whether the water turbine is operating or the pump is operating). The pipe is routed so as to pass through a position higher than the HWL (high water level) of the suction water level, and then the air in the suction pipe is extracted, and the siphon principle generated thereby is used to guide the water to the water turbine. The present invention relates to a water turbine facility having a siphon type suction channel and an operation method thereof.
[0002]
[Prior art]
Conventionally, in water turbine equipment with a siphon-type suction channel, the supply of water can be stopped reliably just by destroying the siphon when the turbine stops, so an on-off valve for stopping water movement when the turbine stops is provided with its suction pipe and There is an advantage that it does not need to be installed in the discharge pipe.
[0003]
In the case of this water turbine equipment, the problem is how to form a siphon when the water turbine is started. Conventionally, prior to the start of the water turbine, the siphon is extracted by extracting the air in the suction pipe with a wet vacuum pump installed separately. Was forming. The piping of the vacuum pump is connected to the downstream side of the air vent pipe installed at the highest position in the suction pipe. After detecting that the air in the suction pipe has completely escaped, the air vent pipe is closed and the water turbine is closed. I started driving.
[0004]
However, when the siphon is formed by the above method, it is indispensable to install a wet vacuum pump as an auxiliary machine for the water turbine, and the diameter of the vacuum pump is considerably smaller than the diameter of the water turbine. Prior to start-up, there was a problem that it took a considerable time to remove the air in the suction pipe of the water turbine with the vacuum pump.
[0005]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and its purpose is to reduce the start-up time, to eliminate the need for a vacuum pump and to simplify the system, and to provide a water turbine facility having a siphon-type suction water channel and its It is to provide a driving method.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the invention according to claim 1 of the present application is a water turbine facility having a siphon-type suction water channel, and an air vent means is attached to the uppermost position of the suction pipe forming the suction water channel, and the suction pipe disconnect from that and then through the water only in the water wheel direction on the suction side of a position of attaching the air vent means pressurizes the inside suction pipe by blocking water in the opposite direction the air in the suction pipe from the air vent means attaching a check valve which issued, even more water turbine in hydraulic turbine equipment having a siphon inlet water channel, characterized in that the concatenation of the motor and the generator or the motor and the generator.
[0007]
In the invention according to claim 2 of the present application, the motor / generator is driven as a motor at the time of starting the water turbine equipment, and the water on the discharge pipe side is fed back to the suction pipe to pressurize it . When the air is extracted through the air venting means, while the suction pipe is filled to the extent that siphon action occurs and the air venting means is closed, it is configured to generate electricity as a generator by the water flowing from the suction pipe toward the discharge pipe. It exists in the watermill installation which has the siphon type suction water channel of Claim 1 characterized by these.
[0008]
In the invention according to claim 3 of the present application, the motor and the generator connect the motor and the generator to the water turbine through the power switching unit, respectively, and drive the motor when starting the water turbine equipment to When water is fed back to the suction pipe and pressurized , the air in the suction pipe is extracted through the air venting means, and when the suction pipe is filled to the extent that siphon action occurs and the air venting means is closed, the discharge pipe is discharged from the suction pipe. The water turbine facility having a siphon-type suction water channel according to claim 1, wherein the generator is driven by water flowing toward the water to generate electric power.
[0009]
In other words, a check valve is attached to the suction side of the water turbine, water is allowed to pass only in the direction of the water turbine, and a motor / generator (or a motor and a motor within the generator) is used as a motor at the time of start-up. The water on the discharge side of the water wheel is sent back toward the suction side to pressurize the inside of the suction pipe, and the air in the suction pipe is extracted through the air venting means provided at the top of the suction pipe. When the pump operation is stopped after confirming that the inside is full by water coming out of the air venting means and closing the air venting means, the water is automatically discharged from the suction pipe through the water turbine by siphon action. Then, the water turbine is started, and the motor / generator (or the generator of the motor and the generator) connected to the water turbine shaft operates as a generator to generate power.
[0010]
Here, if the motor used at the time of pump operation and the generator used at the time of water turbine power generation are made to perform a dual role with one motor / generator, the equipment machine is simplified and the water turbine is By reversing the pumping action, the air in the suction pipe can be extracted in a shorter time than when a small wet vacuum pump is used.
[0011]
When the motor used during pump operation and the generator used during turbine power generation are installed separately, the motor and the generator are connected to the turbine via power switching means such as a clutch or a switching gear. What is necessary is just to switch the motor and generator connected with a water turbine by a switching means. When this turbine equipment is mainly used for power generation, the generator is usually connected to the turbine, and when a pump action is required, the motor is connected to the turbine by the power switching means.
[0012]
The check valve can be of any mechanism as long as it has a function of stopping water flow in the reverse direction. For example, a flap valve or a foot valve can be used. Even a valve with a simple structure and a leakage of about 10% of the flow rate when the pump of the water wheel is pumped can be used.
[0013]
The air venting means may be any mechanism as long as it can extract air in the suction pipe at the uppermost part in the suction pipe. For example, the air vent means may be constituted by an air vent pipe and an on-off valve. If this air vent means is also used to introduce air into the suction pipe, it can also be used to destroy the siphon by introducing air into the suction pipe when stopping the water turbine action. In addition, if an automatic air vent valve is installed in the air vent pipe and the valve closes when air is discharged and water fills the valve by the pumping action of the water turbine, an electrical signal is sent at the moment when the valve is closed. If a converter that can be converted to is attached, it is possible to open and close the on-off valve in the same pipe by obtaining the signal. If the on-off valve is a solenoid valve or an electric valve, it can be automatically closed, and this signal can be obtained to automatically switch the wiring of the motor / generator connected to the turbine. Further, this air venting means may be used exclusively for air venting, and the air introduction pipe for destroying the siphon may be attached separately. The timing for closing the air vent means is not necessarily limited to when the suction pipe is completely filled with water, but may be when the suction pipe is filled to the extent that siphon action occurs.
[0014]
The invention according to claim 4 of the present application is a method of operating a water turbine facility having a siphon-type suction water channel, and a position where the air vent means is attached to the suction pipe forming the suction water channel and the air vent means of the suction pipe is attached. A check valve that allows water to pass only in the direction of the water turbine is attached to the suction side, and the water turbine is temporarily operated as a pump at the time of start-up to pressurize the suction pipe by sending water in the direction opposite to the direction of the water turbine. In the operation method of the water turbine equipment having the siphon type suction water channel , the air in the suction pipe is extracted from the air venting means, and the inside of the suction pipe is filled to the extent that the siphon action is caused thereby to operate as a water turbine. is there.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is an overall configuration diagram of a water turbine facility having a siphon-type suction channel according to an embodiment of the present invention. As shown in the figure, the water turbine equipment having the siphon type suction water channel is configured by connecting a suction pipe 11 to the suction side of the water wheel 12 and a discharge pipe 13 to the discharge side.
[0016]
Here, the suction pipe 11 passes from the suction side of the water turbine 12 through a position higher than the HWL of the suction water level 1 (that is, the water level at which the suction water level 1 does not rise any higher), and then the suction side end is liquid at the suction water level 1. It is configured to be bent so as to be submerged. That is, the suction pipe 11 constitutes a siphon pipe. Air venting means 20 is attached to the uppermost position of the suction pipe 11. In this embodiment, the air vent means 20 is composed of an on-off valve 21 and an air vent pipe (exhaust pipe) 22. At the inlet end (suction end) of the suction pipe 11, a check valve 15 that allows water to pass only in the direction of the water turbine 12 is installed. The check valve 15 may be installed at an upper portion rather than at the inlet end of the suction pipe 11. In short, the check valve 15 may be installed on the suction side from the position where the air vent means 20 of the suction pipe 11 is connected.
[0017]
The water wheel 12 is a vertical water wheel, and is configured by housing an impeller 12a in a casing. The impeller 12a is installed at a position lower than the LWL (low water level) of the discharge water level 2 (that is, the water level at which the discharge water level 2 does not drop any more) (at least the position where the lower part of the impeller 12a comes into contact with water). Even if the water level 2 becomes the lowest water level, it is installed at a position where water on the discharge side can be pumped. A motor / generator 14 is installed in the upper part of the water turbine 12, and the rotational drive shaft of the water turbine 12 is connected to the rotational drive shaft of the motor / generator 14. In the motor / generator 14, the same device can be used by switching only the wiring to the wiring for supplying power when the motor is used, and to the output wiring for the current when using as the generator.
[0018]
In the case of performing the waterwheel operation by this watermill equipment, it is necessary to first form a siphon in the suction pipe 11, so that the motor / generator 14 is first driven as a motor with the on-off valve 21 opened, and the watermill 12 The pump is operated, and the water on the discharge pipe 13 side, that is, the water in the discharge tank 32 is fed back toward the suction pipe 11. As a result, the inside of the suction pipe 11 is filled with water while the air in the suction pipe 11 is extracted from the air vent pipe 22. Immediately after confirming that water comes out of the air vent pipe 22 and the inside of the suction pipe 11 is filled with water, the on-off valve 21 is closed, and at the same time, the motor / generator 14 is driven as a motor (pump action). And switch the wiring to the generator.
[0019]
As a result, the suction pipe 11 is filled with water to form a siphon, so that the water in the suction tank 31 flows into the discharge tank 32 through the suction pipe 11, the water wheel 12, and the discharge pipe 13. Is rotated (turbine operation), and the motor / generator 14 connected to the turbine 12 is rotationally driven as a generator, and the generated power is output. During the operation of the water turbine, the uppermost portion of the suction pipe 11 is at atmospheric pressure or lower. Therefore, when the air vent pipe 22 is a mechanism that is opened to the atmosphere, the on-off valve 21 is closed during the operation of the water turbine as described above. I have to leave.
[0020]
Next, in order to stop the water turbine action, if the on-off valve 21 installed at the top of the suction pipe 11 is opened, the top of the suction pipe 11 is at a negative pressure with respect to the atmosphere. Then, air is introduced into the suction pipe 11, the water during siphon action falls, and water is not supplied to the water turbine 12 and stops.
[0021]
In the above embodiment, the motor / generator 14 is installed. Instead, two motors and a generator are installed separately, and the motor and the generator are connected to a power switching means such as a switching gear or a clutch. By switching at, the same function as the motor / generator 14 may be exhibited. Here, FIG. 2 is an overall configuration diagram of a water turbine facility having a siphon-type suction channel according to another embodiment of the present invention in which two motors 17 and 18 are installed separately instead of the motor / generator 14. is there. In the figure, the same parts as those in the embodiment shown in FIG. That is, in this water turbine equipment, instead of the motor / generator 14, the motor 17 and the generator 18 are installed on the upper part of the water turbine 12 via the switching gear 19. In the switching gear 19, the turbine 12 is normally connected to the generator 18, and the turbine 12 is connected to the motor 17 by switching the switching gear 19 as necessary. As in the embodiment shown in FIG. 1, when the water turbine equipment is started, the motor 17 is driven, the water on the discharge pipe 13 side is sent back toward the suction pipe 11, and the air in the suction pipe 11 is passed through the air vent means 20. When the suction pipe 11 is fully filled to the extent that siphon action occurs and the air vent means 20 is closed, the generator 18 is driven by the water flowing from the suction pipe 11 toward the discharge pipe 13 to generate electric power.
[0022]
3 (a) and 3 (b) are enlarged schematic cross-sectional views of a water turbine 12 portion according to still another embodiment of the present invention. That is, in FIGS. 3 (a) and 3 (b), as in the case of FIG. 2, two motors 17 and generators 18 are installed separately, but in FIG. A motor 17 and a generator 18 are installed directly above the impeller 12a, and a rotary drive shaft 26 connected to the motor 17 via a clutch 25 is passed through the generator 18 to be connected to the impeller 12a. A pipe-like rotary drive shaft 28 connected to the generator 18 via a clutch 27 and passing the rotary drive shaft 26 therein is also connected to the impeller 12a. In other words, the rotary drive shafts 26 and 28 are double shafts. When the clutch 25 is connected and the clutch 27 is disconnected, the motor 17 is connected to the impeller 12a. When the clutch 27 is connected and the clutch 25 is disconnected, the generator 18 is connected to the impeller 12a. Even with this configuration, the generator 17 and the motor 18 can be switched and connected to the water turbine 12.
[0023]
3B, a double suction type water wheel is used as the water wheel 12, and the rotary drive shafts 26 and 28 connected to both ends of the impeller 12a are connected to the motor 17 and the generator 18 through the clutches 25 and 27, respectively. Connected and configured. When the clutch 25 is connected and the clutch 27 is disconnected, the motor 17 is connected to the impeller 12a. When the clutch 27 is connected and the clutch 25 is disconnected, the generator 18 is connected to the impeller 12a. Even with this configuration, the generator 17 and the motor 18 can be switched and connected to the water turbine 12.
[0024]
【The invention's effect】
As described above in detail, according to the present invention, a water turbine having a water channel forming a siphon is reversed and pumped, and air in the suction pipe is discharged to form a siphon to start a water turbine operation. Therefore, the air in the suction pipe can be extracted in a short time, and the startup time of the water turbine can be shortened. In addition, a vacuum pump is not required and the system can be simplified.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram of a water turbine facility having a siphon-type suction water channel according to an embodiment of the present invention.
FIG. 2 is an overall configuration diagram of a water turbine facility having a siphon type suction channel according to another embodiment of the present invention.
FIGS. 3 (a) and 3 (b) are enlarged schematic cross-sectional views of a water turbine 12 portion according to still another embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Suction water level 2 Discharge water level 11 Suction piping 12 Water wheel 12a Impeller 13 Discharge piping 14 Motor and generator 15 Check valve 17 Motor 18 Generator 19 Switching gear (power switching means)
20 Air vent means 21 On-off valve 22 Air vent pipe (exhaust pipe)
25 Clutch (power switching means)
26 Rotation drive shaft 27 Clutch (power switching means)
28 Rotation Drive Shaft 31 Suction Tank 32 Discharge Tank

Claims (4)

In water turbine equipment with siphon type suction channel,
Is attached to the air vent means in the uppermost position of the suction pipe that forms the suction water channel, and it and then through the water only in the water wheel direction on the suction side of a position fitted with said air vent means of the suction pipe the water in the opposite direction A check valve that pressurizes the inside of the suction pipe by blocking to extract air in the suction pipe from the air venting means is attached, and further, a motor / generator or a motor and a generator are connected to the water turbine. A watermill with a siphon-type suction channel. The motor / generator is driven as a motor at the time of starting the water turbine equipment, and the water on the discharge pipe side is fed back to the suction pipe to pressurize it to extract the air in the suction pipe through the air venting means, while the suction pipe is 2. The siphon type according to claim 1, wherein when the water is filled to such an extent that siphon action occurs and the air venting means is closed, power is generated as a generator by water flowing from the suction pipe toward the discharge pipe. Turbine equipment with a suction channel. The motor and the generator are connected to the water turbine via the power switching means, respectively, and when the water turbine equipment is started, the motor is driven and the water on the discharge pipe side is fed back toward the suction pipe to be added. pressure and the air in the suction pipe drawn through said air vent means, whereas when the suction pipe is closed air vent means to full capacity to the extent caused siphoning drives a generator by the water flowing toward the discharge pipe from the suction pipe The turbine equipment having a siphon-type suction channel according to claim 1, wherein the turbine is configured to generate electric power. In the operation method of water turbine equipment having a siphon type suction channel,
Attaching an air vent means to the suction pipe that forms the suction water passage, and attaching a check valve that allows water to pass only in the direction of the water turbine to the suction side of the suction pipe from the position where the air vent means is attached,
At the time of start-up, the water turbine is once operated as a pump, and water is sent in a direction opposite to the direction of the water turbine to pressurize the inside of the suction pipe, thereby extracting the air in the suction pipe from the air venting means, thereby siphoning the inside of the suction pipe. A method of operating a water turbine facility having a siphon-type suction channel, wherein the operation is performed as a water turbine after the water is filled to such an extent as to cause an action.

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