JP4224501B2 - Water supply pump device - Google Patents

Description

  The present invention relates to a water supply pump device that stores water pumped up from a water source such as a river, a pond, a water tank, a pool, or groundwater into a water tank and supplies the water.

  Conventionally, self-priming water pumps used in water trucks, etc. are driven by filling the water pump with water and exhausting the water channel to supply water. Exhaust is possible only by driving the water pump Therefore, the operation is easy and can be performed at low cost. However, since the pumping capacity of the water pump is weak, it takes a long time to exhaust, and since a small amount of water is stirred at high speed rotation of the impeller, the water temperature in the water pump is likely to rise, and the water pump is in a vacuum state There was a problem that the water inside boiled and water supply was impossible. Moreover, the head of this self-priming water pump was limited to within 4 to 5 m.

  On the other hand, a water supply pump device that uses water left in a water tank for exhaust has been proposed. This technology reverses the water in the water tank by operating the valve, exhausts the air in the water channel to the water source, and then switches the valve to the suction side to supply the water. The water supply capacity is 8m. However, since it is necessary to leave a sufficient amount of water (300 to 500 L) for the reverse flow in the water tank in advance, the worker always performs the operation such as sprinkling while checking the remaining amount of water for the next exhaust. Must. In addition, if the backflow exhaust time is not properly determined, water in the water tank is insufficient on the way, exhaust is incomplete, and skill is required for work.

In addition, the suction loading method using an ejector (see Patent Document 1) has a fast exhaust capacity in the suction hose / suction circuit, and the suction level can be reduced from 7m to nearly 8m from the ground to the water surface. -The control circuit is complicated and it is an expensive watering truck.
Japanese Patent No. 2683539

  The problem to be solved by the present invention is to provide a low-cost water supply pump device that can solve these conventional problems and can quickly start water supply with an easy operation.

The configuration of the present invention that solves this problem is as follows.
1) A pump is provided in the middle of the first water channel connecting the water tank outlet and the water supply destination, and a first switching valve is provided in the middle of the first water channel between the pump and the water tank outlet to connect to the water source. A spare tank that branches off the second water channel and has an open top in the water tank is provided, and a second switching valve is provided in the middle of the first water channel between the pump and the first switching valve, and the water outlet of the spare tank A third switching valve is provided in the middle of the first water channel between the pump and the water supply destination, and is connected to the middle of the first water channel between the first switching valve and the second switching valve. A water supply branching off the fourth waterway, branching a fifth waterway connecting to the upper part of the reserve tank in the middle of the first waterway between the third switching valve and the water supply destination, and providing an open / close valve in the middle of the fifth waterway Pump device 2) A full water sensor is installed in the water tank to detect full water, and each valve is controlled. The control means includes a first control for opening the third water channel side of the second switching valve, the first water channel side of the third switching valve, and the opening / closing valve for a predetermined time, and the second water channel side of the first switching valve. And a second control for opening the third water channel side of the second switching valve and the fourth water channel side of the third switching valve for a predetermined time, the second water channel side of the first switching valve, and the first of the second and third switching valves. The third control for sequentially opening the water channel side and the opening / closing valve until the water tank full sensor detects is performed, and when supplying water to the water supply destination, the first water channel side of the first to third switching valves is opened. The water supply pump device described in 1), which is controlled so as to close the on-off valve, is provided in a water truck provided with the water supply pump device described in 1) or 2) above on a vehicle provided with a water sprayer.

  According to the present invention, even if the water in the water tank is used up after the water supply, the water remains in the spare tank, so that it can be used for the next air venting, and the operator can perform the water supply work without checking the remaining amount. Further, the capacity of the reserve tank is about 1/3 to 1/5 of that of the prior art, and the suction tank can be reliably evacuated and loaded with a small amount of water. In particular, in the case where each valve is controlled by the control means, a series of steps are automatically performed and water supply can be started quickly and easily, and skill is not required for operation. In addition, compared with the ejector system of the prior art, the time required for suction loading is about the same, but the apparatus has a simple structure and can be implemented at low cost.

  In the present invention, if a control means for controlling each valve is provided, a series of steps are automatically performed, water supply can be started quickly and easily, and no skill is required for operation. As the switching valve, an electric / pneumatic type or a manual type can be used, and those having at least three ports are used. Embodiments of the present invention will be specifically described below with reference to the drawings.

  The embodiment shown in FIGS. 1 to 6 is an example in which the water supply pump device of the present invention is applied to a water truck. FIG. 1 is an explanatory diagram of a feed water pump device according to an embodiment, FIG. 2 is an explanatory diagram of a control circuit according to the embodiment, and FIGS. 3 to 6 are explanatory diagrams illustrating a usage state of the feed water pump device according to the embodiment.

  In the figure, 1 is a water tank, 1a is a water outlet, 1b is a full water sensor, 2 is a reserve tank, 2a is a water outlet, 3 is a water supply unit, 4 is a first water channel, 5 is a pump, 6 is a first switching valve, 7 is a water source, 8 is a second water channel, 8a is a strainer, 9 is a second switching valve, 10 is a third water channel, 11 is a third switching valve, 12 is a fourth water channel, 13 is a fifth water channel, and 14 is an open / close valve. , 15 is a control circuit, 15a is a push button switch, 15b is a relay, 15c and 15d are timer relays, 15e is a fuse, 16 is a sprinkler, 16a is a valve, a to c are ports of each switching valve, and W is water. is there.

  As shown in FIG. 1, the water supply pump device of the present embodiment is provided with a pump 5 in the middle of a first water channel 4 connecting the water discharge port 1 a of the water tank 1 and the water supply unit 3, and the pump 5 and the water tank 1 discharge the water. A first switching valve 6 is provided in the middle of the first water channel 4 between the water port 1a to branch the second water channel 8 connected to the water source 7, and a spare tank 2 having an open top is provided inside the water tank 1, A second switching valve 9 is provided in the middle of the first water channel 4 between the pump 5 and the first switching valve 6 to branch the third water channel 10 connected to the water discharge port 2a of the reserve tank 2, and the pump 5 and the water supply unit 3 A third switching valve 11 is provided in the middle of the first water channel 4 between the second switching valve 9 and the fourth water channel 12 connecting with the middle of the first water channel 4 between the first switching valve 6 and the second switching valve 9. In the middle of the first water channel 4 between the third switching valve 11 and the water supply unit 3, a fifth water channel 13 connected to the upper side of the reserve tank 2 is divided. Then, an opening / closing valve 14 is provided in the middle of the fifth water passage 13, a full sensor 1b for detecting full water is provided in the water tank 1, and a control circuit 15 (see FIG. 2) for controlling the valves 6, 9, 11, 14 is provided. Provided. Each switching valve 6, 9, 11 is constituted by an air-type three-way ball valve having ports a to c, and the opening / closing valve 14 is constituted by an electric two-way ball valve.

  In this embodiment, when the push button switch 15a is pushed after the pump 5 is driven, the relay 15b is held, and the current flows from the relay 15b to the first switching valve 6, the opening / closing valve 14, the timer relay 15d, and the second switching valve 9. As shown in FIG. 3, the ports b and c of the second switching valve 6, the ports a and b of the third switching valve 11, and the opening / closing valve 14 are opened, and the water W is supplied from the reserve tank 2 to the third water channel 10. 2 is sucked into the pump 5 through the switching valve 9 and the first water passage 4, and flows to the spare tank 2 through the third switching valve 11, the first water passage 4, the fifth water passage 13 and the opening / closing valve 14 and circulates. This circulation continues for ten and several seconds, and the inside of the first water passage 4, the third water passage 10, the fifth water passage 13 and the pump 5 between the pump 5 and the water supply unit 3 is exhausted.

  Next, when the timer relay 15c is activated at a set time, a current flows through the third switching valve 11, and the ports b and c of the first switching valve 6 and the ports of the second switching valve 9 as shown in FIG. b, c and ports a, c of the third switching valve 11 are opened, and the water W is sucked from the reserve tank 2 to the pump 5 through the third water passage 10, the second switching valve 9, and the first water passage 4, and is switched to the third state. It flows backward to the water source 7 through the valve 11, the fourth water channel 12, the first water channel 4, the first switching valve 6, and the second water channel 8. This reverse flow continues for several seconds, and the inside of the second water channel 8 and the fourth water channel 12 is exhausted.

  Next, when the timer relay 15d is actuated at a set time, the currents of the second switching valve 9 and the third switching valve 11 are cut off, and the ports b and c of the first switching valve 6 as shown in FIG. The ports a and b of the second switching valve 9 and the ports a and b of the third switching valve 11 are opened (the opening / closing valve 14 is always opened), and the water W is switched from the water source 7 to the second water channel 8 / first switching. It is sucked into the pump 5 through the valve 6, the first water passage 4, and the second switching valve 9, and flows into the spare tank 2 through the third switching valve 11, the first water passage 4, the fifth water passage 13, and the opening / closing valve 14. Two saturated waters W are stored in the water tank 1. When the water level of the water W in the water tank 1 rises and is detected by the full sensor 1b, the relay 15b is no longer held and the suction loading is completed.

  When the water is sprayed after completion of the suction loading, the ports a and b of the first switching valve 6, the ports a and b of the second switching valve 9, and the ports a and b of the third switching valve 11 are opened as shown in FIG. At the same time, the open / close valve 14 is closed, and the water W reaches the valve 16a of the sprinkler 16 from the water outlet 1a of the water tank 1 through the water supply unit 3, and the water W is sprinkled from the sprinkler 16 when the valve 16a is opened.

  As described above, according to this embodiment, the operator can start water supply quickly and easily by simply pressing the push button switch 15a, and the operation can be started without requiring skill. . Further, even if the water W in the water tank 1 is used up after watering, the water W remains in the spare tank 2 so that it can be used for the next exhaust, and the operator can perform watering work without checking the remaining amount of water W. became. Further, the capacity of the reserve tank 2 is about 1/3 to 1/5 of that of the prior art, and the suction tank can be reliably exhausted and loaded with a small amount of water W. In addition, compared with the ejector system of the prior art, the time required for suction loading is about the same, but the device has a simple structure, resulting in a low-cost watering wheel.

  The water supply pump device of the present invention can be used for watering vehicles, fire trucks, road surface washing vehicles, factory water supply devices, and the like.

It is explanatory drawing of the water supply pump apparatus of an Example. It is explanatory drawing of the control circuit of an Example. It is explanatory drawing which shows the use condition of the water supply pump apparatus of an Example. It is explanatory drawing which shows the use condition of the water supply pump apparatus of an Example. It is explanatory drawing which shows the use condition of the water supply pump apparatus of an Example. It is explanatory drawing which shows the use condition of the water supply pump apparatus of an Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Water tank 1a Water outlet 1b Full sensor 2 Spare tank 2a Water outlet 3 Water supply part 4 1st water channel 5 Pump 6 1st switching valve 7 Water source 8 2nd water channel 8a Strainer 9 2nd switching valve 10 3rd water channel 11 3rd switching Valve 12 Fourth water channel 13 Fifth water channel 14 Open / close valve 15 Control circuit 15a Push button switch 15b Relay 15c, 15d Timer relay 15e Fuse 16 Sprinkler 16a Valve a to c Port W Water

Claims (3)

  A pump is provided in the middle of the first water channel connecting the water outlet of the water tank and the water supply destination, and a second switching valve is provided in the middle of the first water channel between the pump and the water outlet of the water tank to connect to the water source. A water tank is branched, a spare tank having an open top is provided inside the water tank, and a second switching valve is provided in the middle of the first water path between the pump and the first switching valve to connect to the water outlet of the spare tank. A fourth branch is formed by branching the third water channel, providing a third switching valve in the middle of the first water channel between the pump and the water supply destination, and connecting the middle of the first water channel between the first switching valve and the second switching valve. A water supply pump device which branches a water channel, branches a fifth water channel connecting to the upper part of the reserve tank in the middle of the first water channel between the third switching valve and the water supply destination, and provided an opening / closing valve in the middle of the fifth water channel .   The water tank is provided with a full sensor for detecting full water, and control means for controlling each valve is provided. The control means includes a third water channel side of the second switching valve, a first water channel side of the third switching valve, and an opening / closing valve. A first control for opening a predetermined time; a second control for opening a second water channel side of the first switching valve; a third water channel side of the second switching valve; and a fourth water channel side of the third switching valve; The second water channel side of the switching valve, the first water channel side of the second and third switching valves, and the third control for opening the open / close valve until the full water sensor of the water tank detects are successively performed to supply water to the water supply destination. 2. The water supply pump device according to claim 1, wherein the first and third switching valves are controlled so that the first water channel side is opened and the on-off valve is closed.   A watering vehicle in which a water supply pump device according to claim 1 or 2 is provided in a vehicle provided with a watering machine.

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