JP2000297780A - Pumping-up device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low-cost pumping-up device by setting the pressure resistance strengths of most pumping pipes to approx. pumping water pressure. SOLUTION: In a pumping-up device in which a pump control part 19 stops a pump 14 based on pressure detection signals of a pressure sensor 18, when the water pressure of a pumping pipe 17 becomes higher than the pumping water pressure by a prescribed value, after a motor-operated value control part 22 set a motor-operated value 20 in a closed state based on the filled water level direction signals of a water level detection mechanism detecting the water level of an elevated water tank 16, the motor-operated valve 20 is arranged in the pumping pipe 17 adjacent to the pump 14 in the downstream of the pump 14 and the water level detection mechanism is so constituted as to detect the water level of an elevated water tank 16 without opening/closing an outlet of the pumping pipe 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pumping device for pumping water to an elevated water tank.

[0002]

2. Description of the Related Art FIG. 2 is an explanatory view showing a schematic configuration of an example of a conventional pumping apparatus, and FIG. 3 is an explanatory view showing a configuration of a water level detecting mechanism. 2 and 3, the illustration of the gate valve and the check valve is omitted, and the illustration of the signal lines and the like is also omitted.

In FIG. 2 or FIG. 3, 1 is a building such as an apartment, 11 is a water pipe buried underground, 12 is a branch pipe branched to supply water from the water pipe 11 to the building 1, and 13 is a ground pipe. The pump installation frame 14 is mounted on the pump installation frame 13 and the suction side is connected to the suction pipe 12. Reference numeral 15 denotes an elevated water tank installation stand provided on the roof of the building 1, 16 denotes an elevated water tank installed on the elevated water tank installation stand 15, 17 denotes a pumping pipe, and one end of the pumping pipe 17 is a discharge of the pump 14. The other end of the pumping pipe 17 protrudes into the elevated water tank 16 from a side wall near the ceiling.

[0004] Reference numeral 18 denotes a pressure sensor provided in the pumping pipe 17, which outputs a pressure detection signal that detects the water pressure (pressure) of the pumping pipe 17. Reference numeral 19 denotes a pump control unit which controls the pump 14 based on a pressure detection signal from the pressure sensor 18. Reference numeral 20 denotes a motor-operated valve, which is disposed on the pumping pipe 17 near the elevated water tank 16 downstream of the pressure sensor 18 and opens and closes the flow path of the pumping pipe 17.

[0005] Reference numeral 21 denotes a water level detecting mechanism for detecting the water level of the elevated water tank 16, and four electrodes 21a, 21b, 21c, 21d having different lengths projecting from the ceiling into the elevated water tank 16.
A water level detection signal output unit 21e that determines the water level in the elevated water tank 16 and outputs each water level detection signal, as described below, based on which of the four electrodes 21a to 21d is immersed in the water W. It is composed of

Reference numeral 22 denotes a motor-operated valve control unit, which controls the motor-operated valve 20 based on a water level detection signal of a water level detection mechanism 21. Reference numeral 23 denotes a water supply pipe, one end of which is an elevated water tank 16.
Is connected to the side wall near the bottom of the house, and the other end side branches sequentially and extends to the water use point of each house. Reference numeral 24 denotes a faucet provided on the other end of the water supply pipe 23.

Next, the operation will be described. First, it is assumed that the electrodes 21b to 21d are stored in the elevated water tank 16 up to the full water level where the electrodes 21b to 21d are immersed in the water W. The electrodes 21a to 21a
The water level at which 21 d is immersed in the water W and the water level at which the electrodes 21 a to 21 d float from the water W are alarm water levels.

At the above-mentioned full water level, the pressure sensor 18 outputs a pressure detection signal higher than the pumping pressure by a predetermined value, so that the pump control unit 19 stops the pump 14.
When the water level is full, a water level detection signal is output from the water level detection mechanism 21, so that the motor-operated valve control unit 22 closes the electric valve 20. In this full state, a predetermined faucet 2
When 4 is opened, water is supplied at a pressure due to the height difference between the elevated water tank 16 and the faucet 24, and the water level in the elevated water tank 16 drops. Then, when all the faucets 24 are closed, the lowering of the water level in the elevated water tank 16 stops, and the water level is maintained.

When the water W in the elevated water tank 16 is sequentially used in this manner, the electrode 21b floats from the water surface and the electrode 2b
1c and 21d are immersed in the water W. When the water W in the elevated water tank 16 is further used, the electrode 21c floats from the water surface, and only the electrode 21d reaches the pumping water level immersed in the water W. Therefore, the pumping water level detection signal is output from the water level detecting mechanism 21.

The motor-operated valve control unit 22 supplied with the pumping water level detection signal opens the motor-operated valve 20, so that the water pressure in the water pumping pipe 17 decreases. The pump control unit 19 includes the pump 1
The pump 14 is driven and controlled so that the water pressure of the pump 7 becomes the pumping water pressure, and the water W in the water pipe 11 is drawn in through the drawing pipe 12 and pumped to the elevated water tank 16. Thus, the electric valve 20
Is opened and the pump 14 is operated, the pumping pipe 1
From the state where only the electrode 21d is immersed in the water W, the electrode 21c and the electrode 21b are immersed in the water W in this order from the state where only the electrode 21d is immersed in the water W.

When the electrodes 21b to 21d are immersed in the water W, the water level becomes full, so that the water level detection mechanism 21 outputs a full water level detection signal. The motor-operated valve control unit 22 closes the motor-operated valve 20 based on the full water level detection signal. When the motor-operated valve 20 is closed in this manner, the water pressure of the pumping pipe 17 increases. Therefore, when the pressure detection signal that detects the pressure of the pumping pipe 17 becomes higher than the pumping pressure by a predetermined value, the pressure detection signal is used. The pump control section 19 stops the pump 14.

Thereafter, the same operation is repeated to store the water W at the water level between the pumping water level and the full water level in the elevated water tank 16, so that the water can always be supplied.

[0013]

In the conventional pumping apparatus, when the pumping to the elevated water tank 16 is completed, the pump is turned off after the motor-operated valve 20 disposed on the pumping pipe 17 near the elevated water tank 16 is closed. Since the pump 14 is stopped, the water pressure in the pumping pipe 17 upstream of the electric valve 20 rises above the pumping water pressure. Therefore, it is necessary to increase the pressure resistance of the pumping pipes 17 in almost the entire area to be higher than the pumping water pressure and also to increase the durability, so that the cost of the pumping pipes 17 increases and the pumping apparatus becomes expensive. Was.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned inconveniences, and provides an inexpensive pumping apparatus by making it possible to almost set the pressure resistance of most of the pumping pipes to the pumping water pressure.

[0015]

SUMMARY OF THE INVENTION According to the present invention, a control unit for a motor-operated valve closes a motor-operated valve based on a full water level detection signal of a water level detecting mechanism for detecting a water level of an elevated water tank, and then controls the pumping pipe. In the pumping device in which the pump control unit stops the pump based on the pressure detection signal of the pressure sensor in which the water pressure has become higher than the pumping water pressure by a predetermined value, an electric valve is provided in a pumping pipe near the pump downstream of the pump. The water level detecting mechanism is configured to detect the water level of the elevated water tank without opening and closing the discharge port of the pumping pipe.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram showing a schematic configuration of a water pumping apparatus according to one embodiment of the present invention, and the same or corresponding parts as those in FIG. 2 or FIG. In FIG. 1, similarly to FIGS. 2 and 3,
The illustration of the gate valve and the check valve is omitted, and the illustration of signal lines and the like is also omitted.

In the pumping apparatus according to one embodiment of the present invention, the motor-operated valve 20 which is conventionally provided in the pumping pipe 17 near the elevated water tank 16 is located downstream of the pump 14 and on the ground near the pump 14. It is arranged and fixed on the pumping pipe 17.

As described above, since the motor-operated valve 20 is provided in the pumping pipe 17 near the pump 14 downstream of the pump 14,
When the pumping to the elevated water tank 16 is finished, even if the pump 14 stops after the electric valve 20 is closed and the water pressure of the pumping pipe 17 upstream of the electric valve 20 rises higher than the pumping water pressure, The pumping pipe 17 where the water pressure rises above the pumping water pressure is only slightly upstream of the electric valve 20. Therefore, the pressure resistance of most of the pumping pipes 17 can be almost the pumping water pressure,
Since the cost of the pumping pipe 17 can be reduced, an inexpensive pumping device can be provided.

Since the pressure resistance of most of the pumping pipes 17 can be almost the same as the pumping pressure, the pumping apparatus of the present invention is applied by using most of the piping system of the pumping apparatus using the existing receiving tank. This makes it possible to switch to a direct-feeding type water pumping device, shorten the construction period, and prevent water leakage due to excessive pressure applied to the diverted water pumping pipe 17. In addition, since the motor-operated valve 20 is disposed and fixed to the pumping pipe 17 located on the ground near the pump 14 downstream of the pump 14, vibration and noise when the motor-operated valve 20 operates are not transmitted to the building 1, Pollution caused by vibration and noise when the motor-operated valve 20 operates can be eliminated.

In the above embodiment, the electrodes 21a to 21a
Although the water level detection mechanism 21 that detects the water level based on which of d is immersed in the water W is shown, any water level detection mechanism that can detect the water level of the elevated water tank 16 without opening and closing the discharge port of the pumping pipe 17. For example, it is constituted by another configuration, for example, a float and each switch, and when the water level reaches the full water level, the full-water detection switch changes the state by the action of the float, and when the water level reaches the pumping water level, the float detection switch changes the state by the action of the float. It goes without saying that the configuration may be the same.

[0021]

As described above, according to the present invention, since the motor-operated valve is provided in the pumping pipe near the pump downstream of the pump, the motor-operated valve is closed when pumping to the elevated water tank is completed. Even if the pump stops after the pump is turned on and the water pressure in the pumping pipe upstream of the motor-operated valve rises above the pumping water pressure, the water pressure rises above the pumping water pressure. become. Therefore, since the pressure resistance of most of the pumping pipes can be almost equal to the pumping water pressure, the cost of the pumping pipes can be reduced, and an inexpensive pumping apparatus can be provided.

Since the pressure resistance of most of the pumping pipes can be almost the same as the pumping pressure, the pumping apparatus of the present invention can be applied by using most of the piping system of the pumping apparatus using the existing receiving tank. By this, it is possible to switch to a direct-feed type pumping device, shortening the construction period,
Leakage due to excessive pressure applied to the diverted pumping pipe can be prevented.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram illustrating a schematic configuration of a water pump according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a schematic configuration of an example of a conventional water pump.

FIG. 3 is an explanatory diagram illustrating a configuration of a water level detection mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Building 11 Water pipe 12 Service pipe 13 Pump installation stand 14 Pump 15 Elevated water tank installation stand 16 Elevated water tank 17 Pumping pipe 18 Pressure sensor 19 Pump control unit 20 Electric valve 21 Water level detection mechanism 21a Electrode 21b Electrode 21c Electrode 21d Electrode 21e Water level detection signal output unit 22 Control unit for motorized valve 23 Water supply pipe 24 Faucet W Water

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F04D 15/02 F04B 49/02 311

Claims (1)

[Claims] After the electric valve control unit closes the electric valve based on a full water level detection signal of a water level detection mechanism for detecting the water level of the elevated water tank, the water pressure of the pumping pipe is a predetermined value higher than the pumping water pressure. In a pumping apparatus in which a pump control unit stops a pump based on a pressure detection signal of a raised pressure sensor, the motor-operated valve is disposed in the pumping pipe near the pump, downstream of the pump, A pumping device, wherein the detecting mechanism is configured to detect a water level of the elevated water tank without opening / closing a discharge port of the pumping pipe.