JP2683539B2 - Water supply pump device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to a river, a water sprinkler, a road washing car, a washing device, a water supply device of a factory, etc.
The present invention relates to a water supply pump device for drawing water from a water source such as a pond, an aquarium, a pool, and groundwater to supply water.

[0002]

2. Description of the Related Art A conventional water supply pump device is provided with a pump in the middle of a water passage between a water source and a water outlet so as to pump up water from the water source and discharge the water from the water outlet with a required water pressure. At the time of starting the water supply pump device, since the water passage is not filled with water, the suction force by the pump is not generated or the self-suction force of the pump is weak and the water cannot be pumped up. Therefore, conventionally, a vacuum pump is provided in addition to the pump, and at the time of start-up, the vacuum pump is operated to suck water from the water source, and the water passage is filled with water so that the suction force of the pump can be generated. This self-priming power becomes a problem especially when it is necessary to discharge water quickly, as in a fire engine.

[0003]

In the conventional water supply pump device equipped with the vacuum pump, the use of the vacuum pump increases the maintenance and management burden on the user and also increases the manufacturing cost. is there. The problem to be solved by the present invention is to solve these conventional problems, and to provide a self-priming water supply pump device which can be easily maintained and manufactured at low cost.

[0004]

Means for Solving the Problems The constitution of the present invention which has solved the above problems is as follows: 1) A pump is provided in the middle of the main water passage connecting the water source and the outlet, and the pump is provided in the middle of the main water passage between the water source and the pump. The first auxiliary water passage is branched via the first switching valve, and the first auxiliary water passage is connected to a water tank provided at a position where the height difference between the first auxiliary water passage and the pump is small.
In addition, a second auxiliary water passage is provided in the middle of the main water passage between the discharge port and the pump via the second switching valve, and the second auxiliary water passage is connected to the steam separator and the second auxiliary passage is connected. An injection nozzle directed toward the steam separator is provided in the middle of the water passage, and a negative pressure suction port of the injection nozzle is provided in the middle of the main water passage between the first switching valve and the water source and a check valve. 3 Water supply pump device connected by a sub water passage 2) Water supply pump device according to the above 1) in which a steam separator is provided above the inside of the water tank 3) Water discharge port of the water supply pump device according to the above 1) or 2) It is in the water pump system for fire engines that supplied the water from the plant to the water sprayer. Here, the switching valve for the branch of the main water passage and the first or second sub water passage is provided with an on-off valve in the main water passage and the first or second sub water passage, respectively, and is automatically or manually opened or closed. Opening and closing the valve to change the water passage is the same as the water passage,
This is also included in the present invention.

[0005]

In the present invention, the first and second sub water passages are switched at the time of starting, and the water tank, the first sub water passage, the first switching valve, the main water passage, the pump, the main water passage, and the second water passage are connected. Switching valve, second
The water in the water tank is connected to a pump with a small head difference, is sucked by the pump, and is jetted from the jet nozzle toward the steam separator.
Then, a negative pressure area is generated in the injection nozzle, and the negative pressure is the third pressure area.
When the water of the water source is sucked through the sub water passage and the main water passage, and after the suction, the first and second switching valves are switched, the check valve makes the third
While the sub water passage is closed, the main water passage communicates from the water source to the water outlet and is filled with water, and the pump draws water from the water source and discharges it to the water outlet at a required pressure.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. This embodiment is an example of a water supply pump device for a fire engine in which a water discharge port is connected to a water discharge hose, and an example of a structure in which a steam separator is provided above a water tank. FIG. 1 is a connection circuit of a water passage according to the present embodiment, FIG. 2 is an explanatory view showing a water flow at the time of starting of the embodiment, FIG. 3 is an explanatory view showing a water flow at a normal operation of the embodiment, and FIG. FIG. 4 is an explanatory diagram showing an injection nozzle of an example.

In the figure, 1 is a water source of a river, 2 is a spout, 3 is a main water passage, 4 is a pump provided in the middle of the main water passage 3, 5
Is a first switching valve using a three-way switching valve provided in the middle of the main water passage 3 between the pump 4 and the water source 1, 6 is a first auxiliary water passage branched from the first switching valve 5, Reference numeral 7 denotes a water tank which is provided at substantially the same height as the pump 4 and which is connected to the first auxiliary water passage 6, and 8 denotes a steam separator provided above the inside of the water tank 7, and which has a second auxiliary passage. It is composed of a nozzle 80 provided in a space above the inside of the water tank 7 at the end of the water channel 10, an exhaust port 81 provided above the water tank 7, and a tank chamber 70 of the water tank 7. 9 is a main water passage 3 between the pump 4 and the water outlet 2.
A second switching valve using a three-way switching valve provided in the middle of the
Is a second auxiliary water passage branched from the second switching valve 9, 11
4 is an injection nozzle provided in the middle of the second auxiliary water passage, and as shown in FIG. 4, the position of the throttle portion 110, the outlet portion 111 at the tip of the throttle portion 110 that reduces in cone shape, and the throttle portion 110. And a suction port 112 that opens the second auxiliary water passage wall.
Reference numeral 12 is a third sub water passage connecting the main water passage 3 between the pump 4 and the water source 1 and the suction port 112, 13 is a check valve provided in the middle of the third sub water passage 12, 14 Is a water discharge hose for fire fighting connected to the water discharge port 2, and 15 is a water discharge nozzle attached to the tip of the water discharge hose 14.

In this embodiment, at the time of start-up, the first and second switching valves 5 and 9 are operated as shown in FIG.
Is connected to the first sub water passage 6 and the second sub water passage 10, and operates the pump 4. Since the pump 4 and the water tank 7 are located at substantially the same height in the first sub water passage 6, the water in the water tank 7 is filled with water. When the pump 4 operates, the pump 4
Sucks water from the water tank 7, sends pressured water from the main water passage 3 to the nozzle 80 of the steam separator 8 through the second switching valve 9, the second auxiliary water passage 10 and the injection nozzle 11, Water and air are separated from the fountain 80, the water returns to the water tank 7, and the air is discharged from the exhaust port 81 to the atmosphere. When this water passes through the jet nozzle 11, the cone-shaped throttle 110
The water is accelerated at the outlet 11 in the second auxiliary water passage 10.
Water is blown from 1 at high speed. As a result, a negative pressure air region is generated on the outer periphery of the throttle portion 110, and the suction port 11
The water of the water source 1 is sucked from 2 through the third sub water passage 12 and the main water passage 3 connected thereto, and the water of the water source 1 flows out to the suction port 112 through the main water passage 3. The main water passage 3 between the first switching valve 5 and the water source 1 is filled with water. Thus, the main water passage 3 between the water source 1 and the first switching valve 5, the main water passage 3 between the first switching valve 5 and the pump 4, the pump 4 and the second switching valve 9, The main water passage 3 between is filled with water.

After this state is reached, the first and second switching valves 5 and 9 are operated to switch the passage from the first and second sub water passages to the main water passage 3. Then, the pump 4 is the main water passage 3
Since the water is filled with water, the water of the water source 1 immediately becomes the main water passage 3, the first switching valve 5, the main water passage 3, the pump 4, the main water passage 3, the second switching valve 9, the water outlet 2. Through water hose 14
The water is sprayed to the fire site so as to extinguish the fire. The first and second switching valves 5 and 9 of this embodiment can each be composed of two on-off valves, and the present invention also includes this.

[0010]

As described above, according to the present invention, the circuit of the water tank, the steam separator, the first and second switching valves, the first, second and third auxiliary water passages and the jet nozzle. The self-priming force at the time of start-up can be provided by adding a simple configuration of adding a device, and there is an effect that it is cheaper than a vacuum pump and can be easily maintained.

[Brief description of the drawings]

FIG. 1 is a connection circuit of a water passage according to this embodiment.

FIG. 2 is an explanatory diagram showing a flow of water at the time of starting of the embodiment.

FIG. 3 is an explanatory diagram showing the flow of water during normal operation of the embodiment.

FIG. 4 is an explanatory diagram showing an injection nozzle of an example.

[Explanation of symbols]

 1 Water Source 2 Outlet 3 Main Water Channel 4 Pump 5 First Switching Valve 6 First Sub Water Channel 7 Water Tank 8 Steam Separator 9 Second Switching Valve 10 Second Sub Water Channel 11 Injection Nozzle 12 Third Sub Water passage 13 Check valve 14 Water discharge hose 15 Water discharge nozzle

Claims (3)

(57) [Claims] 1. A pump is provided in the middle of the main water passage connecting the water source and the water outlet, and the first water passage is provided in the middle of the main water passage between the water source and the pump.
The first sub water passage is branched through the switching valve of No. 1, and the first sub water passage is connected to a water tank provided at a position where the height difference between the first sub water passage and the pump is small, and the main water passage between the discharge port and the pump is connected. A second auxiliary water passage is provided on the way through a second switching valve, the second auxiliary water passage is connected to the steam separator, and the second auxiliary water passage is directed toward the steam separator in the middle of the second auxiliary water passage. A water supply pump device in which a jet nozzle is provided, and a negative pressure suction port of the jet nozzle is connected by a third sub water passage having a check valve in the middle of the main water passage between the first switching valve and the water source. 2. The feed pump apparatus according to claim 1, wherein the steam separator is provided above the inside of the water tank. 3. A water supply pump device for a fire engine, which supplies water from a water outlet of the water supply pump device according to claim 1 or 2 to a water discharger.