JPH0220468Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is useful for supplying irrigation water to farmlands, purifying (circulating) or conveying water to rivers, dams, and reservoirs, and for cooling water using tidal currents. It relates to a device that uses the headwork of a river or a dam to move a waterwheel using the head of surplus water, and uses its rotational force to lift a portion of the surplus water to a higher position (pressure) for water intake.

[Conventional technology]

Conventionally, this type of device connects a generator directly to a water wheel, converts the potential energy of water into rotational energy through the waterwheel, and then converts this rotational energy into electrical energy, that is, electricity, using a generator and distribution device. There was one that converted the power and then supplied this power to a motor directly connected to the pump to operate and pump water. In this case, power generation equipment such as a generator and a spreading device, and electric equipment such as a motor and a switchboard for driving the pump using this as a power source are required.

Furthermore, even when surplus water was available, electricity was sometimes purchased from outside to drive the pump motor.
Furthermore, in cases where it was difficult to purchase electricity or from the viewpoint of economic efficiency, the pump was sometimes driven by an internal combustion engine as the prime mover for the pump via a speed reduction device.

[Problem that the invention attempts to solve]

When converting water energy into electrical energy and using it as a power source for pumps, there are various methods, equipment costs, construction costs, and operating and
Maintenance costs were an issue. Furthermore, when the prime mover of the pump is a motor or an internal combustion engine that uses purchased electricity, there are problems not only with these prime mover equipment, but also with the cost of electricity or fuel for operation, and the cost of maintenance. In any of the above cases, there are problems such as securing construction land and natural destruction.Furthermore, there are many auxiliary machines and sensors, and there are restrictions on their reliability and lifespan, making it difficult to maintain and manage them. It was hot.

The present invention aims to solve the above-mentioned problems in the prior art.

[Means for solving problems]

In this invention, in order to solve the above problems, the pump and water wheel are integrated into a compact tubular shape via a speed increasing device, and the pump is placed inside the suction pipe of the water wheel, so that the water flowing out from the water wheel is The structure allows the fluid to flow smoothly into the pump impeller.

[Effect]

If the amount of surplus water (flow rate of the water turbine) is Qw, the effective head is Hw, and the efficiency of the water turbine, speed increaser, and pump is Ew, Eg, and Ep, respectively, then the relationship between the pump discharge amount Qp and the total head Hp is as follows. It will be as follows.

Qp=Ew, Eg, Ep, Qw, Hw/Hp In other words, the surplus water amount Qw with the potential energy of the effective head Hw is generated by the rotational energy Ew・
This energy becomes Qw・Hw, and this energy is converted into energy Qp・Hp/Ep・Eg by the pump via the speed increaser, and the flow rate Qp of the pressure (water head) Hp is obtained.

〔Example〕

In the figure, the runner vane 3 of the water turbine is the main shaft 5
In addition, the impeller 15 of the pump is assembled on the main shaft 11, and these rotating bodies are mounted on bearings 2, 6 and 1, respectively.
3 and 16 are also supported, and the shaft couplings 7 and 10 are also connected on the same axis via a speed increasing device 9. This speed increasing device 9 has the effect of increasing the rotational speed of the water turbine to the required rotational speed of the pump, so that the pump is small and the overall structure is also compact. The bearings 6 and 13 are sealed with mechanical seals 4 and 14, respectively, to protect them from water intrusion. Surplus water due to the difference in height between the intake water level A and the discharge water level B of a river headwork or dam, that is, the effective head, is guided through the inlet pipe 1, acts on the runner vane 3 of the water turbine, generates rotational energy, and moves to the desired position. The energy is dissipated and the water is discharged through the casing 8 into the discharge waterway 19. On the other hand, the generated rotational force is transmitted to the rotating body of the pump via the speed increaser 9, and a part of the discharged water is sucked in from the suction port (bell mouth) 12 of the pump, and the impeller 15 maintains the required pressure, that is, the discharged water. It is used to raise the water level from the water level B to the discharge (tank) water level C, which is higher than the water level of the river headwork or dam. Note that 17 is a pump casing, and 18 is a pump discharge pipe. The discharged water that is not recovered by the pump is merged into the downstream of the river from the discharge channel 19. If the head of surplus water fluctuates, a drop in efficiency can be prevented by using movable blades for the water wheel.

[Effect of idea]

The water pumping device of the present invention has the following effects.

(a) Power plant equipment such as generators and distribution equipment (transformers, switchgears such as circuit breakers, instrument transformers, switchboards, supervisory control equipment, and DC power supplies), as well as pump drive motors. There is no need for any energy conversion equipment such as a switchboard or switchboard.

(b) Since the main component is the mechanical structure, the reliability of the equipment is high and maintenance costs are low.

(c) Effective use of surplus water with low head can be made.

(d) By providing a speed increaser, the water turbine and pump can be designed and manufactured independently, providing a greater degree of freedom.

[Brief explanation of the drawing]

The drawing is a longitudinal sectional side view of an embodiment of the present invention. 3... Water turbine runner vane, 9... Speed increaser,
12...Pump suction port, 15...Pump impeller, 19...Discharge waterway.

Claims (1)

[Scope of utility model registration request] It is equipped with a tubular water turbine and an axial flow pump coaxially connected to the tubular water turbine via a speed increaser, and a part of the water discharged from the tubular water turbine is supplied to the suction port of the axial flow pump. A water pumping device characterized in that the remainder of the water is guided to respective discharge channels.