JPH07324375A - Control device of storm sewage pump - Google Patents

Abstract

PURPOSE:To prevent the unnecessary starting and stopping of a storm sewage pump by controlling the opening and closing of an inflow gate and the rotating speed of the storm sewage pump on the basis of water level and the amount of rainfall, and providing a prescribed operating machine number control pattern. CONSTITUTION:When the measured values of a water gauge 1 in front of an inflow gate and a rain gauge reach regulated values or more, the inflow gate 2 is opened. When the measured value of a pump well water gauge 3 reaches a regulated value, a first storm sewage pump 8 is started. A machine number control pattern in which the starting water levels on and after the second storm sewage pump 9 are set higher than the level rise value during the starting of the pump 8 is selected to prevent the start of the pump 9 during the starting of the pump 8. After the starting, the rotating speed is controlled, and the water level is set between the water level of the pump 8 and the general starting level of the pump 9. After a prescribed time, the control pattern is switched to a machine number control pattern in which the starting level of the pump 9 is set to a general value, and those on and after the third storm sewage pump 10 are set higher than the level rise value during the starting of the pump 9. Thus, a wasteful starting can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rainwater pump controller for a rainwater pumping station for draining rainwater flowing in from an urban main line to a river or the like.

[0002]

2. Description of the Related Art Conventionally, when it is judged that it is raining on the basis of data from a water level gauge in front of an inflow gate or rain gauge, and when the inflow gate is opened and rainwater is drawn into the pump well, the water level in the pump well rises and reaches a certain position. Then, the first rainwater pump is operated, and when the water level further rises and reaches the next determined position, the second rainwater pump is operated, and thereafter, the rainwater pumps installed according to the rainwater inflow amount in the same manner. Start up sequentially until the required number of. Conversely, when the inflow of rainwater decreases and the water level drops,
I was trying to stop the rainwater pump at the set water level.

[0003]

According to the above prior art, the rainwater inflow gate is opened, rainwater is drawn into the pump well, the water level in the pump well rises, and the first rainwater pump reaches the start-up water level. If the rainwater pump starts for a long time like a diesel engine drive and the discharge valve is open for a long time, the pump well water level will rise during rainwater pump startup or during the discharge valve opening operation. When the rainwater pump start-up water level is reached, the second rainwater pump will start up regardless of the amount of rainwater inflow that can be drained by one rainwater pump, and when drainage begins, the pump well water level will drop and stop at the stop water level. Then, there was a problem that the rainwater pump, which is unnecessary for drainage, was started / stopped. Furthermore, after the third rainwater pump, as in the above case, there was a problem that even the rainwater pump, which is unnecessary for drainage, was started and stopped.

The present invention has been made to solve the above problems, and its purpose is to control a plurality of rainwater pumps to prevent unnecessary start / stop of rainwater pumps. To provide a device.

[0005]

In order to achieve the above object, the first aspect of the present invention is to provide a pump well for temporarily storing inflow rainwater for drainage, and an inflow for controlling rainwater flowing into the pump well. A gate, a rainwater pump that drains the inflowing rainwater to a river, a water level gauge before the inflow gate that measures the water level in front of the inflow gate, a pump well water level meter that measures the water level of the rainwater stored in the pump well, and rainfall. It has a rain gauge that measures the amount of water, and has a unit control pattern that prevents the opening / closing of the inflow gate, control of the speed of the rainwater pump, and start / stop of pumps that do not require operation based on these data. And a process controller for starting / stopping the rainwater pump according to a pattern.

According to a second aspect of the present invention, in the rainwater pump control device according to the first aspect, when the starting rainwater pump is started, the starting water level of the next starting rainwater pump is increased even if the water level rises during the starting of the starting rainwater pump. It is characterized in that some number control patterns for the positions that do not reach are prepared, and each time the rainwater pump is additionally started, the number control patterns are switched by the process controller.

[0007]

[Operation] When the water level in front of the gate exceeds the specified value and the measured value of the rain gauge exceeds the specified value, it is determined that it is raining and the inflow gate is opened. Rainwater is drawn into the pump well, and the pump well water level reaches the first rainwater pump starting water level and starts the first rainwater pump. Here, as the number-of-units control pattern, the one in which the starting water level after the second rainwater pump is set higher than the water level rise value during the first rainwater pump startup is selected, and the second waterfall pump is activated during the first rainwater pump startup. Prevent the rainwater pump from starting.
Once the first rainwater pump has been started up, the rotation speed of the rainwater pump is controlled so that the water level is between the first rainwater pump water level and the normal second rainwater pump startup water level. And after a certain period of time, the starting water level of the second rainwater pump is
The unit control pattern is set so that the starting water level after the third rainwater pump is set higher than the water level rising value during the starting of the second rainwater pump with the normal value. After the start of the second rainwater pump, switch the same as above.

[0008]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a block diagram of an embodiment of the present invention. As shown in the figure, in this embodiment, a pump well 11 that temporarily stores inflowing rainwater for drainage, and an inflow gate 2 for stopping or drawing in rainwater that flows into the pump well 11 are provided.
And a rainwater pump facility comprising Nos. 1 to 3 rainwater pumps 8, 9 and 10 for draining inflowing rainwater to a river,
Inflow gate 2 Water level meter 1 in front of the inflow gate to measure the water level, Pump well water level meter 3, Rain gauge 4 to measure rainfall, and gate 2 is opened based on these data.
Outputs the start / stop command 13 of the electric motor 12 to be closed,
Outputs the rotation speed control command 7 for the rainwater pumps 8 to 10,
A rainwater pump control device having a unit control pattern for preventing start / stop of pumps that do not require operation, and a process controller 5 for outputting a start / stop command 6 of the rainwater pump according to the pattern is arranged. ing.

Next, the operation of this embodiment will be described.
FIG. 5 is an operation flowchart of the present embodiment, and FIGS. 2, 3 and 4 are number control patterns A, B and C, respectively.
Is. Here, for the sake of explanation, each condition is set as follows. (A) Size of pump well (b) Rainwater pump capacity: 500 (m ³ / min) × 3 units (c) Water level set values of the number control patterns A, B, C are as follows. Pattern A; LL _A ... 1 m, H _1A ... 2 m, H _2A ... 3 m,
_H3A ... 4m, _H4A ... 5m, _H5A ... 6m, _H6A ... 7m. Pattern B; LL _B ... 1 m, H _1B ... 2 m, H 2 _B ′ ... 4
m, _H3B ... 6m, _H4B ... 7m, _H5B ... 8m. Pattern C; LL _C ... 1 m, H _1C ... 2 m, H _{2 C} ... 3 m,
_H3C ... 4m, _H4C ... 6m, _H5C ... 9m. (D) Water level in front of inflow gate: 6 m (e) Rainfall: 5 mm / h (E) Rainwater pump start-up time: 1 minute Discharge valve open time: 3 minutes

First, the inflow gate 2 is in a fully closed state (step S1). Here, when rainwater flows in and the water level gauge 1 in front of the inflow gate reaches the specified value of 6 m (step S2) and the value of the rain gauge 4 reaches the specified value of 5 mm / h (step S
3) Open the inflow gate 2 (step S4) and draw rainwater into the pump well 11.

In the conventional technique, the control is performed only by the pattern A in FIG. 2, and, for example, the inflow of rainwater is 400 (m ³ / m).
in), the value of the pump well water gauge 3 is H
_The first rainwater pump started up after reaching ₃ (4m), and while the rainwater pump startup time was 1 minute and the discharge valve opening time was 3 minutes for a total of 4 minutes, the pump well water level reached 6.3m. When the second rainwater pump is started and the discharge is started, the pump well water level drops and the second rainwater pump stops reaching the water level, and the rainwater pump stops.

However, in this embodiment, when the inflow gate 2 is opened depending on the water level before the inflow gate and the amount of rainfall, the pattern B of FIG. 3 is selected as the unit control pattern (step S5).
As a result, the first rainwater pump reaches the starting water level (4 m) and is started (step S6), 4 (minutes) of the rainwater pump starting time and the discharge valve opening time have elapsed, and the pump well water level is 6.
Even if it rises to 3 (m), the second rainwater pump will not start because the starting water level is 7 m. Next, the pump rotation speed is controlled (step S7) so that the pump well water level is kept constant at 4.5 (m) of the target water level (1) (step S8).
The unit control pattern is switched to the pattern C in FIG. 4 (step S9). Here, if the inflow of rainwater exceeds the capacity of one rainwater pump (500 m ³ / min), the pump well water level rises. When the pump well water level reaches the starting water level 6 (m) of the second rainwater pump, the second rainwater pump is started (step S10). As with the first rainwater pump, it increased during 4 minutes and the inflow of rainwater was 800 (m
³ / min), the pump well water level reaches 8.2 m, but in Pattern C of FIG. 4, the third rainwater pump does not start because the starting water level of the third rainwater pump is 9 m.

Next, the rotational speed of the pump is controlled (step S
11) Then set the pump well water level to the target water level (2) of 6.5.
(M) The unit number control pattern is switched to the pattern A of FIG. 2 so as to be constant (step S12) (step S13). Here, if the inflow of rainwater exceeds the capacity of two rainwater pumps (1000 m ³ / min), the pump well water level rises and the third rainwater pump's starting water level (7
When it reaches m), start the third rainwater pump. In addition,
When the inflow of rainwater decreases and the pump well water level drops, the rainwater pumps are sequentially stopped according to the stop water level of the number control pattern at that time.

As described above, according to this embodiment, the first or second rainwater pump is activated, and the pump well water level rises during 4 (minutes) of the activation time and the discharge valve opening time. However, it is possible to avoid starting the unnecessary second rainwater pump of the second or third pump.

[0015]

As described above, according to the rainwater pump control device of the present invention, the water level rises during the start-up time when the rainwater pump is started and the opening time of the discharge valve, and the inflow amount of rainwater is increased. Although it can be processed by one rainwater pump, it is possible to avoid a wasteful start-up such as starting a next rainwater pump.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is a diagram showing a unit number control pattern A.

FIG. 3 is a diagram showing a unit number control pattern B.

FIG. 4 is a diagram showing a unit number control pattern C.

FIG. 5 is an operation flowchart of the rainwater pump controller of the present invention.

FIG. 6 is a diagram showing the size of a pump well.

[Explanation of symbols]

1 ... Water level gauge before inflow gate, 2 ... Inflow gate, 3 ... Pump well water level gauge, 4 ... Rain gauge, 5 ... Process controller, 6
... start / stop command for rainwater pump, 7 ... rotation speed control command for rainwater pump, 8,9,10 ... rainwater pump, 11 ... pump well, 12 ... motor, 13 ... start / stop command for electric motor.

Claims (2)

[Claims] 1. A pump well for temporarily storing the inflowing rainwater to drain it, an inflow gate for controlling the rainwater flowing into the pump well, a rainwater pump for draining the inflowing rainwater to a river, and the front of the inflow gate. A water gauge before the inflow gate that measures the water level, a pump well water level meter that measures the water level of the rainwater stored in the pump well, a rain gauge that measures rainfall, and the opening / closing of the inflow gate based on these data. It comprises a process controller for controlling the number of revolutions of the rainwater pump, closing, controlling the number of revolutions of the rainwater pump, and controlling the number of pumps that do not require operation. A rainwater pump control device characterized by the above. 2. The rainwater pump control device according to claim 1, wherein the starting water level of the next starting rainwater pump is not reached even when the water level rises during the starting of the starting rainwater pump when the starting rainwater pump is started. A rainwater pump control device characterized in that it is configured such that several process control patterns are prepared, and each time the rainwater pump is additionally activated, the process controller switches the number control pattern.