JPS6231197B2 - - Google Patents

Description

[Detailed Description of the Invention] (A) Technical Field of the Invention The present invention relates to a water pumping device, in particular, for damming river water and transmitting the dammed river water as water supply, industrial water, irrigation water, etc. In the water pumping device, the energy generated when discharging the dammed river water is used to rotate the rotating shaft of the first screw pump, and the rotational energy is used to drive the second screw pump to achieve the above-mentioned effect. Pumping involves pumping up a portion of the river water that has been dammed up to a higher water level, allowing operation to operate at approximately uniform efficiency without being greatly affected by the amount of available river water. It is related to the device.

(B) Technical Background and Problems Conventionally, water supply, industrial water, irrigation water, etc. has been taken in from rivers and conveyed to the destination, and in this case the water is pumped up to the water supply level. In addition, the water that has already been taken from a designated waterway is pumped to a higher water level and then diverted. In such cases, it is often the case that only the amount of water corresponding to a relatively small head is pumped, but this also requires a considerable amount of energy and facility maintenance costs for pumping. There are many things.

The pumps normally used use high-speed rotation of impellers to lift water;
There was no sufficient means for pumping water efficiently and at low cost under moderately low head, so a configuration in which the pump was driven by a motor or the like was adopted.

(C) Purpose and structure of the invention The purpose of the present invention is to solve the above-mentioned problems. For example, when taking water from a river, the entire amount of river water is not taken, of course in times of high water. We focused on the fact that even in times of drought, each river is required to flow downstream at a specified flow rate as water for river maintenance, and in the case of screw pumps, the amount of pumped water can be adjusted steplessly. Focusing on the fact that there is little change in efficiency due to flow rate, the objective is to make it possible to pump water efficiently under the above-mentioned low head while reducing the energy cost to zero. For this reason, the water pumping device of the present invention is a pumping device that dams water and sends the dammed water to a high location as water for use. The first one was installed with a slope.
a second flow channel installed with a predetermined slope between the weir-raised water level and a water supply level higher than the weir-raised water level at the place where the water supply is performed; A first screw pump installed in the flow channel and capable of forward and reverse rotation, a second screw pump installed in the second flow channel, an auxiliary engine, and an output shaft of the auxiliary engine. a clutch that is provided on the side and allows the auxiliary engine to be freely coupled to and disengaged from a rotational energy transmission section through which the first screw pump and the second screw pump are driven;
a first rotary coupling device reversibly coupling a drive shaft of the first screw pump to the rotational energy transmission section; a drive shaft of the second screw pump to the rotational energy transmission section; at least a second rotary coupling device is provided for coupling at least the above, and the dammed water is discharged into the first flow channel, and the rotating shaft of the first screw pump is connected to the discharged water. The second screw pump is rotated by running water, and the second screw pump is rotated by the rotational energy of the first screw pump.
The present invention is characterized in that it has an operating mode in which a part of the water at the dam-raising water level is pumped up to the water supply level through the second flow channel by driving the screw pump. This will be explained below with reference to the drawings.

(D) Embodiments of the Invention Fig. 1 is an explanatory diagram illustrating one embodiment to which the present invention is applied, Fig. 2 shows the configuration of an embodiment of a screw pump used in the present invention, and Fig. 3 shows a second embodiment of the screw pump used in the present invention. Figure 4 is a plan view of an example of equipment corresponding to the case where the screw pump shown in the figure is used.
5 is a cross-sectional view of the screw pump shown in FIG. 2, which is a simplified version of the screw pump shown in FIG.
Another embodiment of the pump, FIG. 6 is a plan view of an embodiment of equipment corresponding to the case where the screw pump shown in FIG. 5 is used, and FIG. 7 is a sectional view taken along line B-B shown in FIG. show.

In Figure 1, 100 is a river, 200 is a weir,
Reference numeral 300 represents a water pumping facility where the water pumping device of the present invention is installed, and 400 represents an irrigation waterway through which water pumped according to the present invention is conveyed.

River water flowing from upstream is raised to a height of, for example, about 5 m by the weir 200 and guided to the water intake of the pumping facility 300. Then, as will be described in detail with reference to FIGS. 2 and subsequent figures, the dammed river water is discharged "downstream" as shown in FIG. 1 through the first flow channel.
During this time, a first screw pump is provided in the first flow channel, and the impeller of the first screw pump is rotated by the water discharge. On the other hand, in order to pump up the river water that has been dammed up to the water supply level of the illustrated waterway 400 located at an even higher water level, a second flow channel is created between the dammed water level and the water supply level,
A second screw pump is provided within the second flow channel. The second screw pump is then driven by the rotational energy of the first screw pump, and a portion of the river water is pumped up to the water supply level. In other words, the energy obtained by discharging the dammed water is used to pump up a portion of the dammed water to a high water level and use it as water for the purpose.

FIG. 2 shows the construction of an embodiment of the screw pump used in the present invention. The code 1 in the figure is the first
2 is a screw pump which is mounted in the first flow channel; 2 is a second screw pump which is mounted in the second flow channel;
3 is a speed reducer, 4 is a drive shaft, 5 is a clutch, 6 is an auxiliary engine with a transmission mechanism, and 7 is a connection means using a bevel gear (corresponding to the second rotational connection device referred to in the present invention). ), 8 is a coupling means using a bevel gear and has a rotating direction switching mechanism (corresponding to the first rotating coupling device referred to in the present invention), and 16 is a surplus power utilization device, such as a generator. , 17 represents a rotational energy transmission section.

In the illustrated case, the first screw pump 1 is connected to the rotational energy transmission section 17 by a reduction gear 3, a drive shaft 4, and a bevel gear 8 having a rotation direction switching mechanism.
A second screw pump 2 is coupled by a reducer 3, a drive shaft 4 and a bevel gear 7, and an auxiliary engine 6, such as a car engine with a transmission, drives the clutch 5. A surplus power utilization device 16 such as a generator is coupled via a clutch 5. The screw pump and the like are installed in the flow channel shown in FIGS. 3 and 4.

In FIGS. 3 and 4, numeral 9 indicates a first flow channel corresponding to the pump casing of the first screw pump 1, and numeral 10 indicates a second flow channel that corresponds to the pump casing of the first screw pump 1. 11 corresponds to the pump casing of pump 2, 11 is a water intake port with a gate, which takes in the dammed water as shown by arrow a in the diagram, and 12 is a discharge port with a gate, as shown in FIG. 1. those that open “downstream”;
Reference numeral 13 denotes a water intake port with a gate during drought, which takes water from a water level corresponding to the "downstream" position shown in FIG. 14 is a flow rate adjustment port with a gate, which has the role of regulating the amount of water flowing into the first flow channel 9 as shown by arrow b in the figure. 15 is the attachment part of the irrigation canal 400 (Fig. 1), for example, about 5 m, as shown by arrow c in the figure, where water is pumped up to provide a water supply level; 18;
represents the embankment facility.

For example, water raised by the weir 200 as shown in FIG. 1 is taken in from the water intake port 11 shown in FIG. The water is then discharged to the outlet 12. At this time, the impeller of the first screw pump 1 shown in FIG. As a result, the second screw pump 2 is driven via the bevel gear 7 shown in FIG. 2, and a portion of the water taken in from the water intake 11 shown in FIG.
0 and is pumped up to the irrigation canal attachment part 15.

FIG. 4 shows a cross-sectional view taken along line A-A in FIG. 3, and it can be seen that the first flow channel 9 and the second flow channel 10 are installed with an inclination of, for example, about 30 degrees. .

In the illustrated embodiment, the rotational energy transmission section 17 shown in FIG. 2 may be considered to be installed near the irrigation canal attachment section 15 shown in FIG. 3 as indicated by the dotted line B in the drawing. In the case of a pump having the configuration shown in FIG. 2, the following operating modes can be adopted, and it is possible to respond to various conditions. That is, [] The first mode of operation (non-powered operation) is carried out under conditions in which a larger amount of water than usual can be used, and as mentioned above, the water taken in from the water intake 11 is transferred to the first flow channel 9. The water is then discharged from the water outlet 12, the impeller of the first screw pump 1 is rotated, the second screw pump is driven, and a portion of the water taken in from the water intake port 11 is transferred to the second flow channel. Pump up after 10. At this time, the auxiliary engine 6 is disengaged by the clutch, but the surplus power utilization device 16 may be disengaged by the clutch or may be coupled to generate power generation output.

[] Second operation mode (power auxiliary operation) The amount of water that can be used is somewhat reduced and the first flow channel 9
This method is adopted when trying to suppress the amount of water discharged to the drain, and the power is supplemented by the above-mentioned auxiliary engine 6 by the amount that the amount of water discharged is reduced. At this time, the surplus power utilization device 16 is generally disconnected by a clutch.

[] Third operation mode (external power operation) This mode is adopted when the amount of available water decreases relatively significantly and the discharge to the first flow channel 9 is stopped, and the bevel gear 8 shown in FIG. is in a neutral state, the first screw pump 1 is stopped, and the second screw pump is turned on by the auxiliary engine 6.
The pump 2 is rotated to pump up the pump.
At this time, the surplus power utilization device 16 can be considered to be disconnected by the clutch. in this case,
The clutch between the bevel gears 7 and 8 shown in FIG. 2 may be disconnected.

[] Fourth operation mode (two-stage pumping operation in series) This mode is used in times of drought, and the first screw pump 1 and the second screw pump 2 are driven by the auxiliary engine 6. As shown in Figure 4, water at the drought level is pumped up in two stages in series. At this time, the surplus power utilization device 16
are held together by a clutch.

When the upstream water level has not completely decreased and is between the water intake level and the drought level, the gate of the outlet 12 is closed, the drought water intake 13 is opened, and the water required for pumping is pumped from the upstream water level. Auxiliary energy can be saved. This is because, as a characteristic of screw pumps, when the amount of water sent is the same, the energy required for pumping water increases or decreases approximately in proportion to the height at which water is pumped.

[] Fifth operation mode (power extraction operation) This is taken when there is no need to supply water temporarily, and the clutch 5 between the bevel gears 7 and 8 shown in FIG. is disconnected, the water taken in from the water intake 11 is discharged into the first flow channel 9, and the impeller of the first screw pump is driven to rotate, and the water is pumped through the clutch. The surplus power utilization device 16 is driven.

As mentioned above, it is possible to take preferable operating modes under various operating conditions, but the fact that the screw pump described above has substantially uniform operating efficiency regardless of the flow rate is that adopting the various operating modes described above is advantageous. This is extremely preferable. In other words, when using the screw pump as a power generation source or as a pump device, the rotation speed can be infinitely selected and can be freely adjusted according to the amount of water that can be used. Because there is.

In FIGS. 2 to 4 above, it has been shown that the auxiliary engine 6 has a surplus power utilization device 16. However, in order to achieve the concept of the first operation mode in a pure manner and with a reduced equipment cost, a simple type as shown in FIGS. 5 to 7 can be adopted.

In FIGS. 5 to 7, the reference numerals in the figures correspond to those in FIGS. 2 to 4. In the case shown in FIG. 5, the first screw pump 1 and the second screw pump 2 are connected on the same axis,
The twisting direction of the wings is reversed. These screw pumps 1 and 2 are attached to a first flow channel 9 and a second flow channel 10 shown in FIG.

The water taken in from the water intake 11 is pumped through the first screw pump 1 and the second screw pump 1 at the joint between the first flow channel 9 and the second flow channel 10.
Pump 2 is guided to its respective vane. This allows most of the water to be directed to the first screw.
The pump is rotated, and the second screw pump 2 is driven by this rotational energy, and the second screw pump 2 pumps up a predetermined amount of water.

(E) Effects of the Invention As explained above, according to the present invention, it is possible to efficiently utilize the energy of running water regardless of the amount of water that can be used in low-head irrigation equipment.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram illustrating an embodiment to which the present invention is applied, FIG. 2 is an embodiment of the configuration of a screw pump used in the present invention, and FIG. 3 is an illustration of the screw pump shown in FIG. 2. A plan view of an example of equipment corresponding to the case in which it is used, Fig. 4 is a diagram A-A shown in Fig. 3.
5 is a cross-sectional view of the screw pump shown in FIG. 2, which is a simplified version of the screw pump shown in FIG.
Another embodiment of the pump, FIG. 6 is a plan view of an embodiment of equipment corresponding to the case where the screw pump shown in FIG. 5 is used, and FIG. 7 is a sectional view taken along line B-B shown in FIG. show. In the figure, 100 is a river, 200 is a weir, 300 is a pumping facility, 400 is an irrigation canal, 1 is a first screw pump, 2 is a second screw pump, 3
is a reduction gear, 4 is a drive shaft, 5 is a clutch, 6 is an auxiliary engine, 7 and 8 are bevel gears, 9 is a first flow path,
10 is a second flow channel, 11 is a water intake, 12 is a discharge port, 13 is a water intake during drought, 14 is a flow rate adjustment port, 1
5 is the installation part of the irrigation canal, 16 is the surplus power utilization device,
17 represents a rotational energy transmission section, and 18 represents an embankment facility.

Claims (1)

[Claims] 1. In a water pumping device that dams up water and sends the dammed water to a higher position as water,
A first flow channel installed with a predetermined slope between the weir-raised water level and the discharge water level, a water level higher than the weir-raised water level and the weir-raised water level at the place where the water is sent. a second flow channel installed with a predetermined slope between the water supply level at
A first screw pump installed in the flow channel and capable of forward and reverse rotation; a second screw pump installed in the second flow channel;
an auxiliary engine, and the auxiliary engine is capable of being coupled to and detached from a rotational energy transmission section provided on the output shaft side of the auxiliary engine and driving the first screw pump and the second screw pump; a first rotary coupling device reversibly coupling the drive shaft of the first screw pump to the rotary energy transmitting portion; a first rotary coupling device for reversibly coupling the drive shaft of the first screw pump to the rotary energy transmitting portion; at least a second rotary coupling device coupling at least a drive shaft is provided, and the dammed water is discharged into the first flow channel, and the rotary shaft of the first screw pump is connected to the rotary shaft of the first screw pump. At the same time, the second screw pump is driven by the rotational energy of the first screw pump, and the water at the weir raising water level is pumped through the second flow channel. A part of the water is pumped to the water level above.
1. A water pumping device characterized by having an operation mode that increases the temperature.