JPS628386Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a water supply stop device in head power generation equipment.

Head power generation equipment in circulating water utilization facilities has recently become popular for water supply, sewage,
This type of power generation means has been installed in agricultural water, industrial water, chemical plants, steel plants, etc., but this type of power generation means inserts a water turbine in the middle of the existing circulating water route, which has a negative impact on the existing process. (1) Even in the event of a failure of the water turbine, sufficient water treatment can be performed as before; (2) The tank located upstream of the circulating water will not overflow, and the same amount of water as before can be secured. (3) Consideration has been given to absorbing excess water that exceeds the capacity of the water turbine upstream of the water turbine and discharging it separately.

To explain the conventional equipment based on FIG. 1, a turbine water supply pipe 2 is provided at the bottom of a water collection tank 1 and a return water tank 3 is installed.
A power generation turbine 5 (centrifugal pump type turbine, horizontal type turbine, etc.) is installed in the middle of the turbine water supply pipe 2 via a water flow control valve 4, and the power generation turbine 5 is connected to a generator 6 via a shaft 7. connected. A water supply pipe 8 is installed above the water collection tank 1 to supply used recycled water wastewater, and the wastewater is temporarily stored in the water collection tank 1 and a constant amount of water is supplied to the power generation turbine 5 through the turbine water supply pipe 2. The water amount is controlled by the water amount adjustment valve 4 so that the turbine is operated at maximum efficiency and the turbine load does not exceed the specification point. Furthermore, if the amount of water exceeds the specification point, it is returned to the return tank 3 through an overflow pipe 9 provided at the upper part of the water collection tank 1. In addition, 10 in the figure is a valve.

The above-mentioned equipment has the following problems as a countermeasure for unrestricted turbine speed during power outages.

(1) In the event of a power outage, the rotation speed of the generator 6 connected to the power generation turbine 5 exceeds the specification point, causing problems with the turbine function (bearing failure, impeller damage, etc.), but this can be avoided. There are no reliable countermeasures for this.

(2) As a general countermeasure, in response to a power outage signal, the water flow control valve 4 is closed by a drive source of another system, such as air drive, and the power generation turbine 5 is closed.
It is possible to stop the water supply to the area. However, (i) it is necessary to newly install air equipment, and the equipment cost is high. (ii) There is a constraint that the power supply for the air supply equipment and the power supply for the generator 6 system must be separate systems and have absolutely high reliability.

There is a problem.

As a result of researching countermeasures for unrestrained turbine speed during power outages, the inventor conducted an experiment that found that when a power outage occurs and the generator becomes unrestrained, the amount of water supplied to the power generation turbine naturally decreases compared to during normal operation. Confirmed by. Focusing on this point, the purpose of the present invention is to provide a water supply stop device for head power generation equipment that can reliably take measures against turbine unrestriction by stopping the water supply by utilizing the rise in the water level in the water collection tank. be.

The structure of the present invention will be explained in detail based on the first embodiment shown in FIGS. 2 to 5. A water tank lid 12 having a hole 11 in the center is fixed to the upper surface of a water collection tank 1, and a floating guide 14 formed of a plurality of rods is provided across the lower surface of this water tank lid 12 and the bottom 13 of the water collection tank 1. Then, the float 15 is inserted into the float guide 14.

As shown in FIG. 3, the float 15 is formed in a closed state with a circular cross section, has an inner chamber 16 therein, has a truncated conical lower end, and has an inclined surface 17 that connects to the water supply pipe 2.
The top surface of the device is configured to be sealed, and a weight 1 is placed on the bottom surface.
8 is fixed, and a plurality of introduction holes 19,... are formed on the upper circumferential surface.
...is established. There is a handle 2 on the top surface of this float 15.
0 is fixed, and protrudes to the outside from a cover 21 fixed so as to cover the hole 11 of the aquarium lid 12.

The float 15 has a weight 18 fixed to its lower surface, and is formed so that the water surface is located below the introduction holes 19, . . . so that the float 15 can float.

Further, a stopper 22 formed of a plurality of rods is fixed to a portion of the guide 14 located on the lower surface of the overflow pipe 9.

In addition, 23 in FIG. 2 is an air suction pipe.

The rest is the same as the conventional equipment shown in FIG. 1, so the same reference numerals are given and the explanation will be omitted.

The first embodiment is constructed as described above, and during normal operation, as shown in FIG. Water is supplied to the turbine 5 for power generation.

During a power outage, the amount of water supplied naturally decreases compared to during normal operation, so the water level in the water collection tank 1 rises. Along with this rise, the float 15 also rises, and the stopper 22 finally prevents the float from rising. In this state, when the water level rises further, water enters the interior chamber 16 through the introduction holes 19, . . . , as shown by solid lines in FIG. 5, and the interior chamber 16 is filled with water. As a result, due to the action of the weight 18, the float 15 sinks vertically under the guidance of the float guide 14 as shown by the chain line in FIG. water supply will be stopped.

By stopping the water supply described above, it is possible to avoid an unrestricted speed state of the power generation turbine 5 during a power outage. Then, when the turbine water supply pipe 2 is closed, the entire amount of water is drained into the return water tank 3 through the overflow pipe 9. Incidentally, since the valve 10 is normally used in an open state, no problem occurs when draining water.

Furthermore, when the water supply to the power generation turbine 5 is stopped, the turbine water supply pipe 2 becomes vacuum, and there is a risk of damage to the pipe. However, since the turbine water supply pipe 2 is provided with an air suction pipe 23, Air supply is done automatically. However, if the turbine water supply pipe 2 is short or if the float 15 is provided with air suction means, the air suction pipe 23 is not necessary.

When restoring the float 15 that has blocked the turbine water supply pipe 2, remove the water tank lid 12 and stopper 22, lift the float 15 using the handle 20, drain the water in the inner chamber 16, and return it to its original state. Return it and let it float on the water surface.

Next, another embodiment of the float 15 shown in Fig. 6 A, B, and C will be explained. , so that water can be introduced from the top surface.

B is formed into a spherical shape, has an inner chamber 16 inside, has a built-in weight 18 in the bottom surface, and has introduction holes 19, . . . as in the first embodiment.

C is formed into a hemispherical shape, has a hollow interior chamber 16, has a built-in weight 18 at the bottom, and is configured to introduce water from the top surface.

The height position of the stopper 22 that stops the lifting of the various floats 15 may be set so that water can enter the inner chamber 16 of the float 15 before it overflows into the overflow pipe 9. It is.

All of the various floats 15 float on the water surface if they do not enter the inner chamber 16, and become weighted 18 when submerged in water.
It is manufactured from a material (for example, synthetic resin, light metal, etc.) that has a specific gravity that sinks in water due to the action of water, but the material is not particularly limited.

Since the present invention has the above-described configuration and operation, the float 15 automatically sinks in the event of a power outage, stopping the water supply to the power generation turbine 5, avoiding the unrestricted speed state of the power generation turbine 5, and preventing power generation. Failure of the turbine 5 can be prevented.

[Brief explanation of drawings]

Fig. 1 is a front view showing a conventional head power generation equipment, Fig. 2 is a front view showing a first embodiment of a water supply stop device in a head power generation equipment according to the present invention, and Fig. 3 is an enlarged sectional view of the main parts. , FIG. 4 is a sectional view taken along the line -- in FIG. 3, FIG. 5 is a front view showing the operating state of the float, and FIGS. 6A, 6B, and 6 are perspective views showing other embodiments of the float. In the figure, 1 is a water collection tank, 2 is a turbine water supply pipe, and 3 is a water collection tank.
1 is a return tank, 15 is a float, 16 is an inner chamber, and 22 is a stopper.

Claims (1)

[Scope of utility model registration request] A head power generation system in which a return water tank 3 and a water collection tank 1 located upstream thereof are connected by a turbine water supply pipe 2, a power generation turbine 5 is installed in the turbine water supply pipe 2, and an overflow pipe 9 is provided in the water collection tank 1. In the equipment, a stopper 22 is provided at a position above the opening of the turbine water supply pipe 2 in the water collection tank 1, and an inner chamber 16 is provided in the water collection tank 1, which floats according to the water level and locks with the stopper 22. A water supply stop device for a head power generation facility, characterized in that a float 15 is provided to encourage water to enter an interior chamber 16 and sink to close the opening of a turbine water supply pipe 2 before overflowing.