JP3308164B2 - Booster pump device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method of supplying water to a building such as an office or a house through which water is supplied from a water main to a building such as an office or a house through a water distribution pipe and a water meter. The present invention relates to an improvement of a booster pump for supplementary pressurized water supply.

[0002]

2. Description of the Related Art Conventionally, a water supply tank is provided on a rooftop in case of insufficient water pressure at the water end of the water main, but from the viewpoint of sanitation in the tank,
In recent years, instead of a rooftop tank, a booster pump device has been used, which increases the pressure of water from a main water supply directly in the course of a small distribution pipe as needed and supplies it.

[0003]

However, the conventional booster pump device is designed mainly for increasing the pressure, so that the distance of the bypass passage is long, and the pressure in the device is increased due to the large number of bent portions. The loss resistance has increased, and the water pressure supplied from the water main has been diminished, which has resulted in an increase in the number of times the booster pump has been operated. In addition, a booster pump device mainly installed on the ground has a problem that the larger its complexity is, the more the installation place is hindered. Therefore, the simplification and miniaturization of the device have been demanded.

[0004]

According to the present invention, tap water is supplied directly from a bypass pipe without operating a booster pump if the water pressure supplied from a water main is equal to or higher than a specified pressure. In order to minimize the pressure loss resistance at the pump, the bypass line from the suction short pipe to the discharge short pipe is linearly arranged, and when operating the booster pump, the bypass pipe is located just before the pressure tank. From the lower elbow pipe to the two booster pumps arranged on the left and right sides of the device, the increased pressure water is led to the discharge merging pipe via the discharge elbow arranged at the top of the pump, and again the bypass pipe The pressure tank is returned to the rear side and is sent to the water supply channel via the discharge short pipe. Further, in the present invention, the 2
A water control valve and a pressure tank are arranged between the two booster pumps.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION When water is directly supplied through a bypass pipe line, the water pressure in the water main is maintained, and the pressure loss in the water main is extremely reduced. The number of times of operation of the pump is reduced as much as possible, and economical pressurized water supply becomes possible. In addition, the booster pumps in the device from the inlet to the outlet are arranged with symmetrical pipes, so that the operation of each booster pump is made uniform such as discharge pressure and current, and the inside of the device. Pipe line resistance can be made equal at the time of booster pump operation.

[0006] Furthermore, even when the water inlet and the water outlet are installed reversely due to on-site piping work, which often occurs in such a water supply device, a built-in or attached backflow prevention device is replaced. It is also possible to reverse the suction and discharge by exchanging the suction short pipe and the discharge short pipe of the present apparatus.

One embodiment of a booster pump device according to the present invention is shown in FIGS. The booster pump device 1
Tap water is drawn from the main water pipe 2 through the water meter 3 into the small water distribution pipe 4 and sent to the bypass pipe line 6 through the short suction pipe 5. A bypass check valve 7 and a pressure tank 8 are provided at an intermediate portion of the bypass pipe line 6, and a lower elbow pipe 9 branches from just before the pressure tank 8 of the bypass pipe line, and a lower elbow pipe branches right and left. And guided to two booster pumps 10, 10 arranged on the left and right sides of the apparatus. Booster pump
The downstream of 10 is connected to a discharge merging pipe 12 via a discharge elbow pipe 11 arranged at the upper part of the pump, merges again into the bypass tank 7 on the rear side of the pressure tank 8, and passes through a short discharge pipe 13 to a water supply path 14. Reach. Water control valves 15, 15, 16, 16 are provided before and after the two booster pumps 10, 10, respectively. A backflow prevention device 17 is provided outside the device.

When the inflow pressure exceeds the required pressure on the discharge side, the booster pump is not operated, and the tap water flows from the inflow port straight through the bypass pipe.
A bypass pipe line 6 from the short suction pipe to the short discharge pipe is arranged in a straight line.

When the inflow pressure is lower than the required pressure on the discharge side, the booster pump is operated. At this time, tap water from the inflow port is guided to the lower elbow pipe from just before the pressure tank in the bypass pipe. , And two booster pumps 10, 10 which are further branched and arranged on the left and right sides of the apparatus.
It is led to. The pressurized tap water is led to a discharge merging pipe 12 through a discharge elbow pipe 11 arranged at the upper part of the pump, returned to the rear side of the pressure tank of the bypass pipe again, and passed through a short discharge pipe 13 to a water supply passage 14. Sent to

The booster pump device 1 is symmetrical with respect to the pressure tank 8 except for the suction short pipe 4, the bypass check valve 7, and the discharge short pipe 13. Therefore,
Depending on the conditions of the installation location of the present apparatus, it is also possible to reverse the suction and discharge by exchanging the suction short pipe and the discharge short pipe of the present apparatus.

[Brief description of the drawings]

FIG. 1 is a front view of a booster pump device according to the present invention.

FIG. 2 is a side view of the booster pump device of the present invention.

FIG. 3 is a sectional view of a booster pump section taken along line AA of FIG. 1;

FIG. 4 is a piping diagram of the booster pump of the present invention,
3 shows the flow of tap water when the pump is not operating.

FIG. 5 is a piping diagram of the booster pump of the present invention,
It is a conceptual diagram which shows the flow of tap water when a pump drives.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Booster pump apparatus 2 Water main pipe 3 Water meter 4 Suction short pipe 5 Water distribution small pipe 6 Bypass piping 7 Bypass check valve 8 Pressure tank 9 Lower elbow pipe 10 Booster pump 11 Discharge elbow pipe 12 Discharge junction pipe 13 Discharge short pipe 14 Water supply channel 15,16 Water control valve 17 Backflow prevention device

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) E03B 5/00 F04B 49/00 321 F04D 15/00

Claims (4)

(57) [Claims] 1. A tap water is supplied from a main water pipe to a suction short pipe through a water distribution pipe and a water meter, and water is supplied directly through a bypass pipe line, or water is supplied under pressure by a booster pump to supply tap water through a discharge short pipe. In a pressurized water supply system, a bypass pipe is provided between the suction short pipe and the discharge short pipe, and between the two booster pumps arranged on the left and right between the suction short pipe and the discharge short pipe. A booster pump device comprising a water control valve and a pressure tank, wherein the line resistance in the device is minimized when the booster pump is not operated, and is arranged so as to be equal left and right when the booster pump is operated. 2. The bypass line from the short suction pipe to the short discharge pipe is arranged in a straight line so that the flow in the bypass line becomes linear when the booster pump is not operated. The booster pump device according to claim 1. 3. When the booster pump is operated, water guided to the lower elbow pipe from just before the pressure tank in the bypass pipe is branched and guided to two booster pumps arranged on the left and right sides of the apparatus, and the pressure is increased. A booster pump, a water control valve and a pressure tank so that water is led to the discharge junction pipe through the discharge elbow arranged at the top of the pump, returned to the back side of the pressure tank of the bypass pipe again, and sent to the water supply path via the discharge short pipe The booster pump device according to claim 1, wherein a booster pump device is provided. 4. The booster pump device according to claim 1, wherein the short suction pipe and the short discharge pipe can be used interchangeably.