JPH05263768A - Booster pump operation controller - Google Patents

Abstract

(57) [Summary] [Constitution] The present invention includes a pressure gauge installed on the discharge side of a parallel water distribution connection composed of first and second pressure boosting pumps for measuring water distribution pressure, and first and second pressure increasing gauges. A 24-hour timer that presets the operating method of the pressure pump on a daily basis
The booster pump operation control device is provided with a machine number selection circuit that compares and examines the operation command from the 4-hour timer and the pressure signal from the pressure gauge and selects the operation of the first or second booster pump. [Effect] According to the present invention, it is possible to effectively operate a water distribution plant.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a booster pump operation control device used in a distribution pump station.

[0002]

2. Description of the Related Art Conventionally, in booster pumps of water supply water distribution pump stations, large and small pumps installed in the water distribution pump station are used by using a 24-hour timer based on a demand pattern preset by the time of day. To respond to changes in demand.

[0003]

Since the demand change does not change according to the demand pattern, the water distribution pressure may increase or decrease extremely for a long time depending on the demand amount at the time of pump switching.

According to the present invention, the switching of the large and small pumps and the timing are controlled so that the fluctuation of the water distribution pressure is minimized according to the demand amount at the time of switching. An object of the present invention is to provide a booster pump operation control device.

[0005]

The present invention is a first large-capacity installed in a water supply water distribution pump station to increase the distribution pressure.
Pressure boosting pump, a second pressure boosting pump that is connected in parallel with the first pressure boosting pump and has a small capacity for adjusting the water distribution pressure, and a parallel combination of these first and second pressure boosting pumps. A pressure gauge installed on the discharge side of the water distribution connection to measure the distribution pressure, a 24-hour timer that presets the operating time of the first and second booster pumps on a daily basis, and operation from this 24-hour timer The command and the pressure signal from the pressure gauge are compared and examined, and the No. selection circuit that selects the operation of the first or second booster pump and the 24-hour timer from the first booster pump to the second booster pump. At the time of switching to, the switching is executed on condition that the value of the pressure gauge falls below the set pressure, and at the time of switching from the second booster pump to the first booster pump, the value of the pressure gauge is above the set pressure. Switch to the condition that it has risen to And Unit selection circuit to execute a pressure increase pump operation control device comprising comprising a driving control circuit for controlling the operation of the first or second boost pump, a by operating signals from the Unit selection circuit.

[0006]

In the booster pump operation control device of the present invention,
The first booster pump is installed at the water supply water pumping station to increase the distribution pressure, and the second booster pump is connected in parallel with the first booster pump to adjust the distribution pressure. And a pressure gauge is installed on the discharge side of the parallel water distribution connection consisting of the second pressure boosting pump to measure the water distribution pressure, and the operation method of the first and second pressure boosting pumps is calculated on a daily basis using a 24-hour timer. In advance, the operation command from the 24-hour timer and the pressure signal from the pressure gauge are compared and examined, the operation of the first or second booster pump is selected, and the first operation is performed by the operation signal from the machine selection circuit. Alternatively, the operation of the second pressure boosting pump is controlled.

[0007]

EXAMPLE An example of the present invention will be described below. In FIG. 1, reference numeral 7 is a first pressure increasing pump 8 installed in a water supply water distribution pump station to increase the distribution pressure, and second pressure increasing pump 8 is connected in parallel with the pressure increasing pump 7 to adjust the distribution pressure. 5
Is a pressure gauge that is installed on the discharge side of the parallel water distribution connection consisting of the pressure boosting pumps 7 and 8 and measures the water distribution pressure. 2 is a 24-hour timer that presets the operating mode of the pressure boosting pumps 7 and 8 on a daily basis. 3 examines the operation command from the 24-hour timer 2 and the pressure signal from the pressure gauge 5, and examines the pressure boosting pumps 7 and 8.
Is an operation control circuit for controlling the operation of the booster pumps 7, 8 in accordance with an operation signal from the machine selection circuit 3, and is a capacity switching means for switching the pump capacity at a predetermined time. And a pressure detecting means for detecting the water distribution pressure, and when the pressure detecting means does not satisfy a preset condition, the capacity switching means is erased. An output signal (contact point) of an alarm setter 4 that detects the alarm setting point from an analog signal of the pressure gauge 5 by installing a pressure gauge 5 that measures the distribution pressure in the water distribution pump facility that controls
Therefore, when the distribution pressure rises, the pump equipment is controlled so as to suppress the distribution flow rate, and conversely, when the distribution pressure decreases, the pump equipment is operated so as to increase the distribution flow rate. By adding water distribution pressure control to the capacity switching control by the 24H timer, abrupt changes in water distribution pressure are suppressed and stable water distribution is performed.

That is, in this water distribution pump station, the 24H timer 2 switches between the large capacity booster pump 7 and the small capacity booster pump 7 to perform the operation according to the demand. This is shown in FIG.

When the demand increases and the booster pump is switched to the booster pump based on the signal of the 24H timer 2, the pressure gauge 5
The distribution pressure is measured at, and the operation with the small pump is continued until the alarm setter 4 outputs a signal of pressure drop.

When the demand is reduced and the large pump is switched to the small pump, the operation with the large pump is continued until the pressure rises due to the reduced demand.

Next, as another embodiment, it can be used to control the number of a plurality of booster pumps having the same capacity.

That is, when the demand increases, and when the operation of one booster pump is switched to that of two booster pumps based on the signal of the 24H timer, the pressure gauge measures the water distribution pressure, and the alarm setter outputs a pressure drop signal. Until then, operation is continued with one pump.

[0013]

According to the present invention, it is possible to minimize extreme fluctuations in distribution pressure, prevent water leakage, cracks in pipes, and breakage, absorb demand fluctuations that do not meet demand patterns, and lack water supply due to water pressure drop. Can be prevented.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a motion control device showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing the characteristics of FIG.

[Explanation of symbols]

 2 ... 24-hour timer 3 ... Unit selection circuit 5 ... Pressure gauge 7, 8 ... Booster pump

Claims (1)

[Claims] 1. A first pressure increasing pump having a large capacity installed in a water supply water distribution pump station to increase distribution pressure, and the first pressure increasing pump.
Second pressure boosting pump connected in parallel with the pressure boosting pump and having a small capacity for adjusting the water distribution pressure, and installed on the discharge side of the parallel water distribution connection composed of the first and second pressure boosting pumps. A pressure gauge for measuring the water distribution pressure, a 24-hour timer for presetting the operating time of the first and second booster pumps on a day-by-day basis, an operation command from the 24-hour timer and the pressure gauge Weigh the pressure signal,
At the time of switching from the first pressure boosting pump to the second pressure boosting pump by this unit selection circuit for selecting the operation of the first pressure boosting pump or the second pressure boosting pump, the value of the pressure gauge is below the set pressure at the time of switching. The changeover is performed on the condition that the pressure gauge is lowered to the lower limit, and at the time when the second pressure increasing pump is changed to the first pressure increasing pump, the changeover is executed on the condition that the value of the pressure gauge rises above the set pressure. A booster pump operation control device comprising: a selection circuit; and an operation control circuit that controls the operation of the first or second booster pump according to an operation signal from the unit selection circuit.