JPS62186080A - Operation controller for liquid feeder - Google Patents

Abstract

PURPOSE:To feed the liquid stably at all times by producing a plurality of level signals corresponding to a detection signal of the liquid level in a liquid storage facility, then selecting one level signal from said plural level signals in accordance with the external factors concerning to the demand of the liquid and controlling a liquid feeder. CONSTITUTION:A liquid storage facility 3 is provided with a liquid level detector 3 and level range setters 51, 52...5n having different setting ranges of liquid level for producing predetermined level signals SH1, SHL... in accordance with a detection signal S from said liquid level detector 4. Said level signals are inputted to a selection circuit 21 in an operation control section 20 so that a selection command circuit 22 selects one of said level range setters 51, 52...5n on the basis of the external factor data provided from an external factor output section 10. When a high level signal is fed from the selected level range setter, an operation stop signal SP is outputted from an operation control signal generator 23 to a liquid feeder, while when a low level signal is fed from said setter, an operation start signal ST is outputted.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to improvements in the operation fl and 11 control device of a liquid transfer device that supplies liquid to liquid storage equipment such as a water storage tank that stores water in a water supply system. .

[Technical background of the invention]

FIG. 4 is a system diagram showing the system configuration of a conventional operation control device of this type. In the figure, reference numeral 1 denotes a liquid feeding device, which supplies liquid from a liquid source (not shown) to a liquid storage facility 3 via a pipe 2 during operation.

The liquid stored in the liquid storage facility 3 is drained out in response to liquid demand from an external system.

On the other hand, the liquid storage facility 3 is provided with a liquid level detector 4, and a detection signal S from this liquid level detector 4 is given to a level range setting device 5. The liquid level range of the liquid in the liquid storage stage @3 is set in advance in the level range setting device 5, and a high level signal SH or a low level signal is sent depending on the detection signal S from the liquid level detector 4. It is designed to output SL. Output signal SH from the level range setter 5
.

SL is given to the operation control signal generator 6. This operation control signal generator 6 outputs an operation stop signal @SP to the liquid feeding device main body when a high level signal SH is given from the level range setting device 5, and when a low/bell signal SL is given. If so, the operation of the liquid feeding device 1 is controlled by outputting an operation start signal ST.

That is, conventionally, as shown in FIG.
t2. t3. t5), the level range setter 5 outputs the low level signal SL, which causes the operation control signal generator 6 to output the low level signal SL.
An operation start signal ST is output from the controller 1, and the operation of the liquid feeding device @1 is started. As a result, liquid is supplied to the liquid storage equipment 3,
The liquid level rises. On the other hand, the liquid level in the liquid storage facility 3 rises and reaches the high level H in the level range set by the level range setting device 5 at time t1. At t4), the level range setting device 5 outputs a high level signal @SH, and as a result, the operation control signal generator 6 outputs an operation stop signal SP, and the operation of the liquid feeding device 1 is stopped.

[Problems with background technology]

However, in the conventional operation control device described above, the level range (L to H) set by the level range setter 5 is
It was necessary to set it at a constant level over a wide range so that it could sufficiently respond to the liquid demand of the external system. Therefore, when the liquid demand level of the external system is low and the amount of liquid flowing out from the liquid storage facility 3 is small (from time 10 to t2>, even though a low liquid level can be used, if the liquid level becomes low L, the liquid is sent. Device 1 started operating and was supplying unnecessary liquid.On the other hand, when the external system had high liquid demand and there were many liquid spills (times t3 to t5), a high liquid level was always required. However, when the level H reaches a high level, the operation of the liquid feeding device M1 is stopped, causing a rapid drop in the liquid level.In addition, in this case, the liquid feeding device 1 continues to operate until the level drops to the level L. Because it is not driven,
It took a long time to return to the high liquid level again, and stable liquid outflow could not be achieved during that time.

[Purpose of the invention]

The present invention was made based on these circumstances,
The purpose is to be able to control the operation of the liquid transfer device according to the level of liquid demand in the external system, and to enable stable liquid transfer.
Another object of the present invention is to provide an operation control device for a liquid feeding device that can improve the economy.

[Summary of the invention]

In order to achieve the above object, the present invention detects the liquid level of a liquid storage facility with a liquid level detector, and outputs a plurality of level signals by a level signal generating means according to the detected output of the liquid level detector. A predetermined liquid level range is set by selecting the plurality of level signals by the level range setting means according to external factors related to the liquid demand level, and the liquid feeding device is controlled according to the set liquid level range. It is designed to control driving.

[Embodiments of the invention]

FIG. 1 is a system diagram showing the system configuration of an embodiment of the present invention. The same parts as in Fig. 4 are given the same reference numerals.
Detailed explanation will be omitted. In Figure 1, 51.52...
, 5n are level range setting devices 51, 52, . The range is set, and the detection signal S of the liquid level detector 4
It outputs predetermined level signals SH1, SLI, . . . 10 is an external factor output unit, which outputs external factor data related to the degree of liquid demand from an external system;
For example, time data, outflow amount data from the liquid storage equipment 3, liquid level data of the liquid storage equipment 3, etc. are output.

Reference numeral 20 denotes an operation control unit which inputs the selection circuit 21 connected to each of the level range setters 51 to 5n and the external factor data output from the external factor output unit 10, and inputs the external factor data output from the external factor output unit 10. a selection command circuit 22 that selects one of the level range setters 51 to 5n connected to the selection circuit 21 based on factor data; and a selection command circuit 22 connected to the output end of the selection circuit 21; If a high level signal is given from the level range setter selected by , an operation stop signal SP is output to the liquid delivery device 1, and if a low level signal is given, an operation start signal ST is output and the liquid is sent. It consists of an operation start signal light generator 23 that controls the operation of the device 1.

Next, we will explain the second part about the operation of this device configured in this way.
The explanation will be given while referring to the time chart shown in the figure.

Each level range setter 51゜52..., 5 (n-
1), 5n have different predetermined level ranges as shown in FIG.
-1) ~H(n-1).

ln to Hn are set. The external factor output unit 10 outputs external factor data in a timely manner based on the current level of liquid demand in the external system. Then, the selection command circuit 22 selects one of the level range setters 51 to 5n connected to the selection circuit 21 based on the external factor data. That is, the level range setter 51 is selected from time tO to t2, and when the next external factor data is output from the external factor output section 10 at time t2, the level range is set based on this external factor data. The setting device 52 is selected. Thereafter, a predetermined level range setter is selected based on the external factor data that is outputted in a similar manner.

Now, if the liquid level in the liquid storage device 3 is at the low level L1 set by the level range setting device 51 at time point 10, a low level signal SLI is output from the level range setting device 51, and a low level signal SLI is outputted via the selection circuit 21. and is given to the operation control signal generator 23. Then, this operation control signal generator 23
An operation start signal ST is outputted from , and the operation of the liquid feeding device 1 is thereby started. By operating the liquid feeding device 1, liquid is fed into the liquid storage device 3, and the liquid level rises.

When the high level H1 set by the level range setter 51 is reached at time t1, the level range setter 51 outputs a high level signal SH1, and the operation control signal generator 23 outputs an operation stop signal. SL is output and the operation of the liquid feeding device 1 is stopped.

After that, the liquid level decreases according to the amount of outflow from the liquid storage device 3, and at time t3, the low level L of the level range setting device 51 is set.
Reach 1. Then, the low level signal SLI is output from the level range setter 51, but since the level range setter 52 has already been selected based on external factor data at this point, the low level signal SLI is the operation control signal. The liquid is not sent to the generator 23 and the operation of the liquid feeding device 1 is not restarted. On the other hand, when the liquid level reaches the low level L2 set by the level setter 52 at time t4, a low level signal SL2 is output from the level range setter 52 and sent to the operation control signal generator 23.

As a result, the operation control signal generator 23 outputs the operation start signal ST, and the operation of the liquid feeding device 1 is restarted.

In this way, in this device, the liquid level range of the liquid storage device 3 related to the operation control of the liquid feeding device 1 is determined based on the external factor data output from the external factor output unit 10 according to the liquid demand level of the external system. Since it is made variable, the following effects are achieved. That is, for example, considering the case where this device is applied to a water supply system, the demand for liquid (water) stored in the liquid storage facility 3 is low at night, but the demand is high in the morning and evening. Therefore, output time data as external factor data, select a level range setter (for example, 52) set to a low level range at night, and select a level range setter (for example, 5n) set to a high level range in the morning or evening. Select. That is, at time t2, the level range setter is switched from 51 to 52, thereby delaying the restart time of the liquid feeding device 1 during the night. Then, the level range set by the conventional level range setter 5 changes from L1 to H1.
When this was the case, conventionally the operation of the liquid feeding device 1 was restarted at time t3 as shown in FIG. 2 (1').
In this device, operation is restarted at time t4. Therefore, the liquid level in the liquid storage equipment 3 is maintained lower than before, and
Wasteful operation of the liquid feeding device 1 is prevented. As a result, very economical operation becomes possible and energy savings can be achieved.

On the other hand, at time t7, level range setter 5 (n-1
) to 5n, the liquid feeding device 1 is operated for a long time in the morning and evening.

Then, when the level rectangle set by the conventional level range setting device 5 was L1 to H1, the conventional system would stop the operation of the feeder device 1 at time t8 and the liquid level would drop. On the other hand, according to the present device, operation continues until time t9. Therefore, the liquid level in the liquid storage facility @3 can be made higher than in the past, and water can be stably supplied to the external system.

Note that the present invention is not limited to the above embodiments.

For example, in the embodiment, a plurality of level range setters 51
5n are provided and a predetermined level range is set by selecting one from these, but as shown in FIG. A high level setter 30 that outputs ~SHn, and a plurality of low level signals SL1 to SL according to the liquid level detection signal S.
A selection circuit 2 is provided with a low level setter 31 that outputs n.
The predetermined level range may be set by selecting one high-level signal and one low-level signal based on external factor data. By doing so, it is possible to set a wide variety of liquid level ranges in the liquid storage equipment 3, and the operation of the liquid feeding device 1 can be controlled more stably and economically.

In addition, in the embodiment described above, the case where all the processing is executed by hardware processing is explained, but the level range setter 51 to
5n and the operation control unit 20 may be executed by software processing by a microcontroller. In addition, it goes without saying that many modifications can be made without departing from the gist of the present invention.

[Effects of the Invention] As detailed above, according to the present invention, the liquid level in the liquid storage equipment is detected by the liquid level detector, and the level signal generating means detects the liquid level in accordance with the detection output of the liquid level detector. A plurality of level signals are output, a predetermined liquid level range is set by selecting the plurality of level signals by a level range setting means according to external factors related to the level of liquid demand, and a predetermined liquid level range is set within the set liquid level range. Since the operation of the liquid transfer device is controlled according to the demand for liquid in the external system, stable liquid transfer is possible, and economical improvement is achieved. An operation control device for liquid equipment can be provided.

[Brief explanation of drawings]

FIG. 1 is a system diagram showing the configuration of an embodiment of the present invention, FIG. 2 is a diagram showing a time chart for explaining the operation of the embodiment, and FIG.
4 is a system diagram showing a modification of the present invention, FIG. 4 is a system diagram showing the configuration of a conventional example, and FIG. 5 is a diagram showing a time chart for explaining the operation of the conventional example. DESCRIPTION OF SYMBOLS 1...Liquid feeding device, 3...Liquid storage equipment, 4...Liquid level detector, 51-5n...Level range setting device, 1o...
External factor output unit, 20... Operation control unit, 21... Selection circuit, 22... Selection command circuit, 23... Operation control signal generator, 30... High level signal generator, 31・・・
-Low level signal generator. Applicant's agent Patent attorney Takehiko Suzue Figure 1

Claims (1)

[Claims] A liquid feeding device that sends liquid to a liquid storage facility includes a liquid level detector that detects the liquid level in the liquid storage facility, and a level signal generating means that outputs a plurality of level signals according to the detection output of the liquid level detector. and a liquid level range setting means for selecting a plurality of level signals outputted from the level signal generating means according to external factors related to the level of liquid demand and setting a predetermined liquid level range; and this liquid level range setting means. 1. An operation control device for a liquid feeding device, comprising: an operation control means for controlling the operation of the liquid feeding device according to a liquid level range of the liquid storage equipment set by.