CN109799848A - A kind of tank level control system and its method for adjusting user's water demand - Google Patents
A kind of tank level control system and its method for adjusting user's water demand Download PDFInfo
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- CN109799848A CN109799848A CN201910066477.2A CN201910066477A CN109799848A CN 109799848 A CN109799848 A CN 109799848A CN 201910066477 A CN201910066477 A CN 201910066477A CN 109799848 A CN109799848 A CN 109799848A
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Abstract
The present invention provides a kind of tank level control system, including more feed pumps, first liquid level gauge, second liquid level gauge and PLC controller.PLC controller receives user instructions, enabled instruction is issued to the feed pump of highest priority according to the order of priority that preset more feed pumps are opened, and after the height of water level in flow pond out to be determined reaches predetermined threshold value, it opens water gate and user's water is provided, and the revolving speed of the feed pump of adjustment highest priority is after constant speed, situation is changed over time according to the height of water level in flow pond, selection maintains the feed pump operating of highest priority or dynamically controls other water supply switch pumps on the basis of the feed pump, maintain the height of water level in flow pond always within a predetermined range to meet user's water demand.Implement the present invention, the liquid level in flow pond is controlled by control speed of feedwater and quantity, is avoided that the frequent starting of feed pump, moreover it is possible to guarantee downstream user water demand.
Description
Technical field
The present invention relates to industrial intelligent technical field more particularly to a kind of tank level control system and its adjust user's water
The method of demand.
Background technique
Tank level control system is process control common in industry, its influence to production can not be ignored, because of technique requirement
Difference, there are many tank level control system type, hold tank level control system, double volume tank level control system such as single.Even if technique requires
Identical tank level control system, there is also controller, detecting element, feedback element and controlling unit, there is also very big differences.
Currently, tank level control system is usually used in the environment of water sources constant liquid level or water supply pump water delivery flow is permanent
In the case where fixed, when downstream user water demand changes or water sources liquid level sharp fall fluctuates, pass through liquid level control
The automatic adjustment of system processed is but difficult to meet process system requirement, not only be easy to cause the frequent starting of front end feed pump, also easy
Cause the liquid level in flow pond of the rear end for buffering front end feed pump hydraulic pressure to be unable to maintain that stablize and be difficult to ensure under user
Swim user's water demand.
Summary of the invention
It is used the technical problem to be solved by the embodiment of the invention is that providing a kind of tank level control system and its adjusting user
The method of water demand is controlled the liquid level in flow pond by control speed of feedwater and quantity, is not only avoided that feed pump
Frequent starting, moreover it is possible to guarantee downstream user water demand.
In order to solve the above-mentioned technical problem, the embodiment of the invention provides a kind of tank level control systems, and being used for will be in reservoir
Water deploy into flow pond, including more feed pumps, first liquid level gauge, second liquid level gauge and PLC controller；Wherein,
After the more feed pumps are connected with the PLC controller, respective water inlet sinks in the reservoir and is discharged
Mouth is connected to the flow pond by corresponding pipeline, after starting, extracts the water in the reservoir into the flow pond；
It after the first liquid level gauge is connected with the PLC controller, sinks in the reservoir, for acquiring the reservoir in real time
Height of water level is simultaneously transferred to the PLC controller；
After the second liquid level gauge is connected with the PLC controller, sink in the flow pond, for acquiring the flow in real time
The height of water level in pond is simultaneously transferred to the PLC controller；
The PLC controller is also connected with the water gate for being set in the flow pond for controlling user's water, for receiving
User instruction issues enabled instruction to the feed pump of highest priority according to the order of priority that preset more feed pumps are opened,
And after the feed pump operating of the highest priority out to be determined allows the height of water level in the flow pond to reach predetermined threshold value, open
The revolving speed for opening the water gate and giving downstream user offer water, and further adjust the feed pump of the highest priority is constant speed
Afterwards, situation is changed over time according to the height of water level in the flow pond, selection maintains the feed pump operating of the highest priority
Or it dynamically controls among the more feed pumps on the basis of maintaining the feed pump operating of the highest priority except priority
Feed pump except highest opens or closes, so that the height of water level in the flow pond is maintained within a predetermined range always to full
The water demand of sufficient downstream user.
Wherein, when the PLC controller determines that the height of water level in the flow pond increases at any time and increases, then judge
The pump-out of the feed pump of the highest priority can satisfy the water demand of downstream user out, and further allow described preferential
The revolving speed of the highest feed pump of grade falls to another constant speed and maintains so that the height of water level in the flow pond maintain always it is pre-
Determine the water demand for meeting downstream user in range.
Wherein, the PLC controller determines that the height of water level in the flow pond increases at any time when reducing instead, then sentences
The pump-out of the disconnected feed pump of the highest priority out is not able to satisfy the water demand of downstream user, can be according to described preset
Order of priority is sequentially incremented by the unlocking condition for opening feed pump and inverted sequence is incremented by and closes feed pump and shut down condition, described in the maintenance
On the basis of the feed pump operating of highest priority, giving in addition to highest priority among the more feed pumps is automatically controlled
Water pump opens or closes, so that the height of water level in the flow pond maintains the use to meet downstream user within a predetermined range always
Water demand；Wherein, the unlocking condition for being sequentially incremented by unlatching feed pump according to the preset order of priority and inverted sequence are incremental
Close feed pump to shut down condition associated with the height of water level in the collected flow pond of the second liquid level gauge.
Wherein, the PLC controller is sequentially incremented by the unlocking condition for opening feed pump according to the preset order of priority
It is that the height of water level in the flow pond and the feed pump among the more feed pumps in addition to highest priority is respectively corresponding
The decline threshold value of setting is compared step by step from big to small, once it is determined that going out under the corresponding setting of the feed pump currently compared
The height of water level that drop threshold value is higher than the flow pond realizes unlatching at once；Wherein, priority is removed among the more feed pumps
The decline threshold value that feed pump except highest is respectively correspondingly arranged sequentially is successively decreased according to the preset order of priority to set
It sets, and the respectively less than described predetermined threshold value.
Wherein, the PLC controller shuts down condition according to the incremental closing feed pump of the preset order of priority inverted sequence
It is that the height of water level in the flow pond and the feed pump among the more feed pumps in addition to highest priority is respectively corresponding
The rise threshold of setting is compared step by step from big to small, once it is determined that going out the upper of the corresponding setting of the feed pump currently compared
Liter threshold value is realized at once lower than the height of water level in the flow pond and is shut down；Wherein, priority is removed among the more feed pumps
The rise threshold that feed pump except highest is respectively correspondingly arranged sequentially is incremented by according to the preset order of priority to set
It sets, and is all larger than the predetermined threshold value.
Wherein, the revolving speed that the PLC controller adjusts the feed pump of the highest priority should be according to first liquid level
The height of water level of collected reservoir is counted to be arranged.
Wherein, revolving speed after feed pump among the more feed pumps in addition to highest priority is opened should all with it is described
The revolving speed of the feed pump of highest priority is identical.
The embodiment of the invention also provides a kind of methods that tank level control system adjusts user's water demand, are including more
Platform feed pump, first liquid level gauge, second liquid level gauge and PLC controller tank level control system on realize, the method includes
Following steps:
The tank level control system is arranged in initialization；Wherein, the water inlet of the more feed pumps sinks in reservoir and is discharged
Mouth is connected to flow pond by corresponding pipeline；The first liquid level gauge is sunk in the reservoir；The second liquid level gauge is sunk to
In the flow pond；The PLC controller respectively with the more feed pumps, the first liquid level gauge, the second liquid level gauge
And it is connected in the flow pond for controlling the water gate of user's water, and the PLC controller is preset with more feed pumps
The order of priority of unlatching；
The PLC controller receives user instructions, and the order of priority opened according to preset more feed pumps is to highest priority
Feed pump issue enabled instruction, and it is to be determined go out the highest priority feed pump operating make the water level in the flow pond high
After degree reaches predetermined threshold value, opens the water gate and downstream user offer water is provided, and further adjust the priority most
After the revolving speed of high feed pump is constant speed, situation is changed over time according to the height of water level in the flow pond, described in selection maintains
The feed pump of highest priority operates or on the basis of maintaining the feed pump operating of the highest priority dynamically described in control
Feed pump among more feed pumps in addition to highest priority opens or closes, so that the height of water level in the flow pond is always
Maintain the water demand within a predetermined range to meet downstream user.
Wherein, the height of water level according to the flow pond changes over time situation, and selection maintains the priority most
High feed pump operating dynamically controls the more water supply on the basis of maintaining the feed pump operating of the highest priority
Feed pump among pump in addition to highest priority opens or closes so that the height of water level in the flow pond maintain always it is pre-
The specific steps for determining the water demand in range to meet downstream user include:
When the PLC controller determines that the height of water level in the flow pond increases at any time and increases, then the PLC control
Device judges that the pump-out of the feed pump of the highest priority can satisfy the water demand of downstream user, and further allows institute
The revolving speed for stating the feed pump of highest priority falls to another constant speed and maintains, so that the height of water level in the flow pond is tieed up always
Hold the water demand for meeting downstream user within a predetermined range；
When the PLC controller determine the height of water level in the flow pond increase at any time reduce instead when, then PLC control
Device processed judges that the pump-out of the feed pump of the highest priority is not able to satisfy the water demand of downstream user, can be according to described
Preset order of priority is sequentially incremented by the unlocking condition for opening feed pump and inverted sequence is incremented by and closes feed pump and shut down condition, is tieing up
On the basis of holding the feed pump operating of the highest priority, automatically control among the more feed pumps except highest priority it
Outer feed pump opens or closes, so that the height of water level in the flow pond maintains to use within a predetermined range to meet downstream always
The water demand at family；Wherein, the unlocking condition for opening feed pump and anti-of being sequentially incremented by according to the preset order of priority
Sequence be incremented by close feed pump to shut down condition associated with the height of water level in the collected flow pond of the second liquid level gauge.
Wherein, the PLC controller is sequentially incremented by the unlocking condition for opening feed pump according to the preset order of priority
It is that the height of water level in the flow pond and the feed pump among the more feed pumps in addition to highest priority is respectively corresponding
The decline threshold value of setting is compared step by step from big to small, once it is determined that going out under the corresponding setting of the feed pump currently compared
The height of water level that drop threshold value is higher than the flow pond realizes unlatching at once；Wherein, priority is removed among the more feed pumps
The decline threshold value that feed pump except highest is respectively correspondingly arranged sequentially is successively decreased according to the preset order of priority to set
It sets, and the respectively less than described predetermined threshold value；
The PLC controller is to match by described according to the condition of shutting down that the preset order of priority inverted sequence is incremented by closing feed pump
Flow the rising that the feed pump among the height of water level and the more feed pumps in pond in addition to highest priority is respectively correspondingly arranged
Threshold value is compared step by step from big to small, once it is determined that it is low to go out the corresponding rise threshold being arranged of the feed pump currently compared
Height of water level in the flow pond is realized at once shuts down；Wherein, among the more feed pumps in addition to highest priority
The rise threshold that feed pump is respectively correspondingly arranged sequentially is incremented by according to the preset order of priority to be arranged, and big
In the predetermined threshold value.
The implementation of the embodiments of the present invention has the following beneficial effects:
1, setting orders of priority in embodiments of the present invention, are opened to more feed pumps, the feed pump of highest priority can not
In the case where meeting user's water demand, feed pump of the dynamic control in addition to highest priority is opened or closed, can prevent because
The height of water level fluctuation in flow pond causes the frequent start-stop of feed pump, guarantee feed pump water delivery flow substantially with user's water flow
It is identical, to reduce system electricity loss, pipe friction loss is reduced, reduces the equipment faults wind such as diving pump/motor/valve
Danger；
2, revolving speed after in embodiments of the present invention, all feed pumps are opened by the collected reservoir of first liquid level gauge water level
Height is arranged, and can prevent that feed pump is caused because of water source liquid level wide fluctuations to run in non-reasonable workspace.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention, for those of ordinary skill in the art, without any creative labor, according to
These attached drawings obtain other attached drawings and still fall within scope of the invention.
Fig. 1 is the attachment structure schematic diagram of the tank level control system provided in the embodiment of the present invention；
Fig. 2 is the application logic chart that three feed pumps open or close in the tank level control system provided in the embodiment of the present invention；
Fig. 3 is the flow chart that the tank level control system provided in the embodiment of the present invention adjusts the method for user's water demand.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, the present invention is made into one below in conjunction with attached drawing
Step ground detailed description.
As shown in Figure 1, in the embodiment of the present invention, a kind of tank level control system provided, for by the water tune in reservoir
It is assigned in flow pond, including more feed pumps 1, first liquid level gauge 2, second liquid level gauge 3 and PLC controller 4；Wherein,
After more feed pumps 1 are connected with PLC controller 4, respective water inlet is sunk in reservoir and water outlet passes through phase
The water in reservoir is extracted into flow pond after starting in the pipeline L connection flow pond answered；
It after first liquid level gauge 2 is connected with PLC controller 4, sinks in reservoir, for acquiring height of water level and the transmission of reservoir in real time
To PLC controller 4；
It after second liquid level gauge 3 is connected with PLC controller 4, sinks in flow pond, for acquiring the height of water level in flow pond in real time simultaneously
It is transferred to PLC controller 4；
PLC controller 4 also be set in flow pond for control user's water water gate T-phase connect, refer to for receiving user
It enables, issues enabled instruction to the feed pump of highest priority according to the order of priority that preset more feed pumps are opened, and to true
Make highest priority feed pump operating allow the height of water level in flow pond to reach predetermined threshold value after, open water gate T give down
After trip user is provided with water, and further the revolving speed of the feed pump of adjustment highest priority is constant speed, according to the water level in flow pond
Height changes over time situation, and selection maintains the feed pump operating of highest priority or in the feed pump fortune for maintaining highest priority
The feed pump dynamically controlled among more feed pumps in addition to highest priority on the basis of turning opens or closes, so that flow pond
Height of water level maintain the water demand to meet downstream user within a predetermined range always.
It should be noted that first liquid level gauge 2 and second liquid level gauge 3 are respectively according to the height of the depth of reservoir and flow pond
It is designed, the height of water level and its situation of change in corresponding reservoir and flow pond can be collected respectively.
It is understood that the feed pump of highest priority can satisfy downstream user water demand be it is best, in this way
System electricity loss can be can reduce to avoid feed pump of the starting in addition to highest priority, reduce pipe friction loss, drop
The equipment faults risks such as low diving pump/motor/valve.If the feed pump of highest priority can be unable to satisfy the use of downstream user
Water demand, i.e. in the case that the water demand of downstream user fluctuates widely, except the feed pump operating for maintaining highest priority
Except, it is also contemplated that other feed pumps are dynamically opened or closed, as long as the height of water level in flow pond maintains predetermined model always
To meet the water demand of downstream user in enclosing, can to avoid because caused by the fluctuation of the height of water level in flow pond feed pump it is frequent
Start-stop.It should be noted that preset range can be set to predetermined threshold value N's+1 meter or other positive and negative height value ranges, and
Predetermined threshold value N can be set according to the whole height in flow pond, such as flow pond whole height 1/2,2/3.
Therefore, it is necessary to change over time situation according to the height of water level in flow pond, the water supply of highest priority could be judged
Whether the pump-out of pump meets the water demand of downstream user, makes a concrete analysis of as follows:
(1) if PLC controller 4 determines that the height of water level in flow pond increases at any time and increases, judge priority most
The pump-out of high feed pump can satisfy the water demand of downstream user, need to reduce the feed pump of highest priority at this time
Otherwise pump-out causes water level to overflow to form water resource waste, i.e., further allow the revolving speed of the feed pump of highest priority to fall to
Another constant speed simultaneously maintains so that the height of water level in flow pond maintain always within a predetermined range come meet downstream user with water need
It asks.
(2) if PLC controller 4 determines that the height of water level in flow pond increases at any time when reducing instead, judge excellent
The pump-out of the first highest feed pump of grade is not able to satisfy the water demand of downstream user, needs the other feed pumps of dynamic regulation at this time
Increase pump-out, while to avoid the pump-out of increased feed pump from causing water level to overflow to form water resource waste, as long as
After the height of water level in flow pond reach a certain height, and the increased feed pump of institute need to be shut down, i.e., it can be according to preset order of priority
Sequentially it is incremented by the unlocking condition for opening feed pump and inverted sequence is incremented by and closes feed pump and shut down condition, is maintaining highest priority
On the basis of feed pump operating, automatically controls the feed pump among more feed pumps in addition to highest priority and opens or closes,
So that the height of water level in flow pond maintains the water demand to meet downstream user within a predetermined range always；Wherein, according to pre-
If order of priority be sequentially incremented by the unlocking condition for opening feed pump and inverted sequence be incremented by close feed pump shut down condition and institute
The height of water level for stating the collected flow pond of second liquid level gauge is associated.
Sequentially being incremented by the unlocking condition of unlatching feed pump according to preset order of priority for PLC controller 4 is by flow
The decline threshold value that the height of water level in pond is respectively correspondingly arranged with the feed pump among more feed pumps in addition to highest priority
It is compared step by step from big to small, once it is determined that going out the corresponding decline threshold value being arranged of the feed pump currently compared is higher than flow
The height of water level in pond realizes unlatching at once；Wherein, the feed pump among more feed pumps in addition to highest priority respectively corresponds to
The decline threshold value of setting is sequentially successively decreased according to preset order of priority to be arranged, and respectively less than predetermined threshold value N.
It is incremented by according to preset order of priority inverted sequence that close the condition of shutting down of feed pump be by flow for PLC controller 4
The rise threshold that the height of water level in pond is respectively correspondingly arranged with the feed pump among more feed pumps in addition to highest priority
It is compared step by step from big to small, once it is determined that going out the corresponding rise threshold being arranged of the feed pump currently compared lower than flow
The height of water level in pond is realized at once and is shut down；Wherein, the feed pump among more feed pumps in addition to highest priority respectively corresponds to
The rise threshold of setting is sequentially to be incremented by according to preset order of priority to be arranged, and be all larger than predetermined threshold value N.
In one embodiment, having three feed pumps is respectively 1#, 2# and 3#, and the order of priority of three feed pumps is arranged
Secondly and 3# priority is minimum for 1# highest priority, 2# priority, it while being divided from low to high to the height of water level in flow pond
Five height of water level grades of L2, L1, N, H1 and H2 out, set N to the threshold value of the height of water level in flow pond, and L2 is 3# water supply
The decline threshold value of pump, L1 is the decline threshold value of 2# feed pump, H1 is the rise threshold of 3# feed pump, H2 is 3# feed pump
Rise threshold.
User's water demand is received in PLC controller 4, i.e. acquisition user instruction, it is preferential according to 1# highest priority, 2#
Secondly and the minimum order of priority of 3# priority grade, selects 1# feed pump and issues enabled instruction, and the revolving speed of 1# feed pump is from opening
Dynamic beginning slowly increases, and the water in reservoir is deployed into flow pond, once second liquid level gauge 3 detects that the water level in flow pond is high
When degree reaches threshold value N, PLC controller 4 opens water gate T and discharges water and adjust 1# feed pump automatically and operate for constant speed, goes forward side by side
The height of water level that one step periodically continues to test interior flow pond by second liquid level gauge 3 according to interval time (such as 30 seconds) changes feelings
Condition.
If PLC controller 4 judges that the height of water level in flow pond increases at any time and increases, illustrate 1# feed pump
Pump-out can satisfy the water demand of downstream user, at this time to avoid water resource from overflowing flow pond, need to reduce 1# feed pump
Pump-out, that is, allow the revolving speed of 1# feed pump to fall to another constant speed and maintain, so that the height of water level in flow pond maintains always
(such as N within a predetermined range+1 meter) meet the water demand of downstream user, system electricity loss is reduced, pipe friction damage is reduced
Consumption reduces the equipment faults risks such as diving pump/motor/valve；
Certainly, if PLC controller 4 judges that the height of water level in flow pond increases at any time when reducing instead, illustrate 1# water supply
The pump-out of pump is unable to satisfy the water demand of downstream user, and the other feed pumps of dynamic regulation is needed to increase pump-out at this time,
Simultaneously to avoid the pump-out of increased feed pump from causing water level to overflow to form water resource waste, as long as the water level in flow pond is high
After degree reach a certain height, and the increased feed pump of institute need to be shut down.
As shown in Fig. 2, the application logic chart that three feed pumps open or close.
For example, contrasting 2# feed pump when the height of water level in flow pond slowly declines and is lower than L1 and meeting unlocking condition, then
At once it opens 2# feed pump to be drawn water with the identical revolving speed of 1# feed pump so that the height of water level in flow pond increases, the water in flow pond
When position height increases arrival H1, contrasts 2# feed pump and meet the condition of shutting down, then shut down 2# feed pump at once, make the water in flow pond
Position height maintains (such as N within a predetermined range always+1 meter, i.e. within the scope of L1 ~ H1) meet the water demand of downstream user, this
Sample can not need frequently to open or shut down 2# feed pump when the height of water level in flow pond changes between L1 and H1,
Reduction system electricity loss reduces pipe friction loss, reduces the equipment faults risks such as diving pump/motor/valve.
For another example, 1# feed pump keeps on the go, and after the unlatching of 2# feed pump, the height of water level in flow pond also will be slow decline,
Then illustrate that 1# and 2# feed pump is all unable to satisfy the water demand of downstream user.Once the height of water level in flow pond is from lower than L1's
Height continues to decline and when lower than L2, contrasts 3# feed pump and also complies with unlocking condition, then open at once 3# feed pump with 1# and
The identical revolving speed of 2# feed pump, which draws water, increases the height of water level in flow pond, when the height of water level in flow pond increases arrival H1,
According to way of contrast step by step from big to small, 3# feed pump is contrasted first and meets the condition of shutting down, then shuts down 3# feed pump at once.
Since front elaborates that 1# and 2# feed pump is all unable to satisfy the water demand of downstream user, after shutting down 3# feed pump, match
The height of water level in stream pond is immediately gradually decreased down from H1 lower than L2, can be again turned on 3# feed pump, repeatedly with this, be made flow pond
Height of water level maintain the water demand for meeting downstream user (i.e. within the scope of L1 ~ H1) within a predetermined range always, thus
It can not need frequently to open or shut down 3# feed pump when the height of water level in flow pond changes between L1 and H1, reduce
System electricity loss reduces pipe friction loss, reduces the equipment faults risks such as diving pump/motor/valve.
For another example, the water demand of downstream user fluctuates widely suddenly, so that the height of water level in flow pond is anxious from threshold value N
When play declines and is lower than L2, according to way of contrast step by step from big to small, contrasts 2# and 3# feed pump and meets unlocking condition,
After opening 2# feed pump at once first, 3# feed pump is then opened.After if 2# and 3# feed pump is opened, the height of water level in flow pond
Slow growth, according to way of contrast step by step from big to small, compares first when then the height of water level in flow pond increases arrival H1
3# feed pump meets the condition of shutting down out, shuts down 3# feed pump, and the height of water level for then observing flow pond again is also increasing simultaneously energy
It increases and reaches H1, then contrast 2# feed pump and meet the condition of shutting down, shut down 2# feed pump at once；If 2# and 3# feed pump is opened
Afterwards, the height of water level rapid growth in flow pond, when the height of water level in flow pond can be made to rise rapidly to reach H2, according to from big to small
Way of contrast step by step, contrast 3# feed pump first and meet the condition of shutting down, shut down 3# feed pump, then observe flow pond again
Height of water level also increasing, then illustrate 1# and 2# feed pump pump-out be greater than user's water demand, 2# can be contrasted
Feed pump also complies with the condition of shutting down, and shuts down 2# feed pump；Or after shutting down 3# feed pump, the water level for then observing flow pond again is high
Degree declines and is lower than H1, then illustrates that the pump-out of 1# and 2# feed pump is still unable to the demand of user's water, then also needs to maintain 2#
The operating of feed pump is again turned on 3# feed pump, repeatedly with this when the height of water level until flow pond is lower than L2.
In embodiments of the present invention, since feed pump is immersible pump, and according to reservoir lowest water level type selecting in thousand, reservoir
When liquid level is normal value, feed pump can not work in reasonable workspace, to solve this problem if feed pump is according to power frequency operation
Immersible pump uses variable frequency pump, so that PLC controller 4 adjusts the feed pump of highest priority and giving in addition to highest priority
The revolving speed of water pump (feed pumps of i.e. all unlatchings) should all be set according to the height of water level of the collected reservoir of first liquid level gauge 2
It sets, and revolving speed is identical.At this point, PLC controller 4 designs four threshold values to compare the water of the collected reservoir of first liquid level gauge 2
Position height, and according to comparing result, adjust the revolving speed of the feed pump of all unlatchings.
It is illustrated by taking the working frequency of the feed pump of highest priority as an example.When PLC controller 4 determines the first liquid level
When counting the heights of water level of 2 collected reservoirs and being greater than first threshold, then the revolving speed for adjusting the feed pump of highest priority is located at the
Between one preset rotation speed and the second preset rotation speed；When PLC controller 4 determines the water level of the collected reservoir of first liquid level gauge 2
When height is greater than second threshold and is less than first threshold, then the revolving speed for adjusting the feed pump of highest priority is located at default turn of third
Between speed and the 4th preset rotation speed；When PLC controller 4 determines that the height of water level of the collected reservoir of first liquid level gauge 2 is greater than
Third threshold value and be less than second threshold when, then the revolving speed for adjusting the feed pump of highest priority is located at the 5th preset rotation speed and the 6th
Between preset rotation speed；When PLC controller 4 determines that the height of water level of the collected reservoir of first liquid level gauge 2 is greater than the 4th threshold value
And when being less than third threshold value, then the revolving speed for adjusting the feed pump of highest priority is located at the 7th preset rotation speed and the 8th preset rotation speed
Between；When PLC controller 4 determines the height of water level of the collected reservoir of first liquid level gauge 2 less than four threshold values, then adjust
The revolving speed of the feed pump of highest priority is between the 9th preset rotation speed and the tenth preset rotation speed.
In one embodiment, the working frequency and flow of the height of water level of reservoir and the feed pump of highest priority are set
Relational expression is as follows:
h1-f(f1,1-f1,2)-Q(Q1,1-Q1,2)；
H2- f(f2,1-f2,2)-Q(Q2,1-Q2,2)；
H3- f(f3,1-f3,2)-Q(Q3,1-Q3,2)；
h4- f(f4,1-f4,2)-Q(Q4,1-Q4,2)；
h5- f(f5,1-f5,2)-Q(Q5,1-Q5,2)；
Wherein, h is the height of water level of reservoir, and h1 > h2 > h3 > h4 > h5, f are the working frequency of the feed pump of highest priority, Q
For the pump-out of the feed pump of highest priority；(fi, 1-fi, 2) be i-th of operating frequency range, i=1,2,3,4,5；(Qi,
1-Qi, 2) it is that the feed pump of highest priority uses the pump-out section being correspondingly formed when i-th of operating frequency range operating
Value, i=1,2,3,4,5；
According to above-mentioned relation formula, in the case where the feed pump of highest priority is in automatic control mode, when the height of water level of reservoir is
When h1, the working frequency adjustable range of the feed pump of highest priority is f1,1-f1,2, when the height of water level of reservoir is become by h1
After h2, the working frequency adjustable extent of the feed pump of highest priority automatically becomes f2,1-f2,2 by f1,1-f1,2, with
This analogizes.
As shown in figure 3, a kind of tank level control system provided adjusts the side of user's water demand in the embodiment of the present invention
Method, include more feed pumps, first liquid level gauge, second liquid level gauge and PLC controller tank level control system on realize,
It the described method comprises the following steps:
Step S1, the tank level control system is arranged in initialization；Wherein, the water inlet of the more feed pumps is sunk in reservoir
And water outlet passes through corresponding pipeline connection flow pond；The first liquid level gauge is sunk in the reservoir；Second liquid level
Meter is sunk in the flow pond；The PLC controller respectively with the more feed pumps, the first liquid level gauge, described second
It is connected in liquidometer and the flow pond for controlling the water gate of user's water, and the PLC controller is preset with more
The order of priority that feed pump is opened；
Step S2, the described PLC controller receives user instructions, and the order of priority opened according to preset more feed pumps is to preferential
The highest feed pump of grade issues enabled instruction, and it is to be determined go out the highest priority feed pump operating allow the flow pond
After height of water level reaches predetermined threshold value, opens the water gate and downstream user offer water is provided, and further adjust described excellent
The revolving speed of the first highest feed pump of grade selects to tie up to change over time situation according to the height of water level in the flow pond after constant speed
It holds the feed pump operating of the highest priority or is dynamically controlled on the basis of maintaining the feed pump operating of the highest priority
It makes the feed pump among the more feed pumps in addition to highest priority to open or close, so that the water level in the flow pond is high
Degree maintains the water demand to meet downstream user within a predetermined range always.
In step s 2, situation is changed over time according to the height of water level in the flow pond, selection maintains the priority
The operating of highest feed pump or dynamically controlled on the basis of maintaining the feed pump operating of the highest priority described more to
Feed pump among water pump in addition to highest priority opens or closes, so that the height of water level in the flow pond maintains always
The specific steps of water demand in preset range to meet downstream user include:
When the PLC controller determines that the height of water level in the flow pond increases at any time and increases, then the PLC control
Device judges that the pump-out of the feed pump of the highest priority can satisfy the water demand of downstream user, and further allows institute
The revolving speed for stating the feed pump of highest priority falls to another constant speed and maintains, so that the height of water level in the flow pond is tieed up always
Hold the water demand for meeting downstream user within a predetermined range；
When the PLC controller determine the height of water level in the flow pond increase at any time reduce instead when, then PLC control
Device processed judges that the pump-out of the feed pump of the highest priority is not able to satisfy the water demand of downstream user, can be according to described
Preset order of priority is sequentially incremented by the unlocking condition for opening feed pump and inverted sequence is incremented by and closes feed pump and shut down condition, is tieing up
On the basis of holding the feed pump operating of the highest priority, automatically control among the more feed pumps except highest priority it
Outer feed pump opens or closes, so that the height of water level in the flow pond maintains to use within a predetermined range to meet downstream always
The water demand at family；Wherein, the unlocking condition for opening feed pump and anti-of being sequentially incremented by according to the preset order of priority
Sequence be incremented by close feed pump to shut down condition associated with the height of water level in the collected flow pond of the second liquid level gauge.
Wherein, the PLC controller is sequentially incremented by the unlocking condition for opening feed pump according to the preset order of priority
It is that the height of water level in the flow pond and the feed pump among the more feed pumps in addition to highest priority is respectively corresponding
The decline threshold value of setting is compared step by step from big to small, once it is determined that going out under the corresponding setting of the feed pump currently compared
The height of water level that drop threshold value is higher than the flow pond realizes unlatching at once；Wherein, priority is removed among the more feed pumps
The decline threshold value that feed pump except highest is respectively correspondingly arranged sequentially is successively decreased according to the preset order of priority to set
It sets, and the respectively less than described predetermined threshold value；
The PLC controller is to match by described according to the condition of shutting down that the preset order of priority inverted sequence is incremented by closing feed pump
Flow the rising that the feed pump among the height of water level and the more feed pumps in pond in addition to highest priority is respectively correspondingly arranged
Threshold value is compared step by step from big to small, once it is determined that it is low to go out the corresponding rise threshold being arranged of the feed pump currently compared
Height of water level in the flow pond is realized at once shuts down；Wherein, among the more feed pumps in addition to highest priority
The rise threshold that feed pump is respectively correspondingly arranged sequentially is incremented by according to the preset order of priority to be arranged, and big
In the predetermined threshold value.
The implementation of the embodiments of the present invention has the following beneficial effects:
1, setting orders of priority in embodiments of the present invention, are opened to more feed pumps, the feed pump of highest priority can not
In the case where meeting user's water demand, feed pump of the dynamic control in addition to highest priority is opened or closed, can prevent because
The height of water level fluctuation in flow pond causes the frequent start-stop of feed pump, guarantee feed pump water delivery flow substantially with user's water flow
It is identical, to reduce system electricity loss, pipe friction loss is reduced, reduces the equipment faults wind such as diving pump/motor/valve
Danger；
2, revolving speed after in embodiments of the present invention, all feed pumps are opened by the collected reservoir of first liquid level gauge water level
Height is arranged, and can prevent that feed pump is caused because of water source liquid level wide fluctuations to run in non-reasonable workspace.
Above disclosed is only a preferred embodiment of the present invention, cannot limit the power of the present invention with this certainly
Sharp range, therefore equivalent changes made in accordance with the claims of the present invention, are still within the scope of the present invention.
Claims (10)
1. a kind of tank level control system, for deploying the water in reservoir into flow pond, which is characterized in that including more water supply
Pump, first liquid level gauge, second liquid level gauge and PLC controller；Wherein,
After the more feed pumps are connected with the PLC controller, respective water inlet sinks in the reservoir and is discharged
Mouth is connected to the flow pond by corresponding pipeline, after starting, extracts the water in the reservoir into the flow pond；
It after the first liquid level gauge is connected with the PLC controller, sinks in the reservoir, for acquiring the reservoir in real time
Height of water level is simultaneously transferred to the PLC controller；
After the second liquid level gauge is connected with the PLC controller, sink in the flow pond, for acquiring the flow in real time
The height of water level in pond is simultaneously transferred to the PLC controller；
The PLC controller is also connected with the water gate for being set in the flow pond for controlling user's water, for receiving
User instruction issues enabled instruction to the feed pump of highest priority according to the order of priority that preset more feed pumps are opened,
And after the feed pump operating of the highest priority out to be determined allows the height of water level in the flow pond to reach predetermined threshold value, open
The revolving speed for opening the water gate and giving downstream user offer water, and further adjust the feed pump of the highest priority is constant speed
Afterwards, situation is changed over time according to the height of water level in the flow pond, selection maintains the feed pump operating of the highest priority
Or it dynamically controls among the more feed pumps on the basis of maintaining the feed pump operating of the highest priority except priority
Feed pump except highest opens or closes, so that the height of water level in the flow pond is maintained within a predetermined range always to full
The water demand of sufficient downstream user.
2. tank level control system as described in claim 1, which is characterized in that the PLC controller determines the flow pond
Height of water level when increasing at any time and increasing, then judge that the pump-out of the feed pump of the highest priority can satisfy down
The water demand of user is swum, and further allows the revolving speed of the feed pump of the highest priority to fall to another constant speed and maintains,
So that the height of water level in the flow pond maintains the water demand to meet downstream user within a predetermined range always.
3. tank level control system as described in claim 1, which is characterized in that the PLC controller determines the flow pond
Height of water level increase when reducing instead at any time, then judge that the pump-out of the feed pump of the highest priority is not able to satisfy
The water demand of downstream user can sequentially be incremented by the unlocking condition and inverted sequence for opening feed pump according to the preset order of priority
Be incremented by closing feed pump shuts down condition, on the basis of maintaining the feed pump operating of the highest priority, automatically controls institute
It states the feed pump among more feed pumps in addition to highest priority to open or close, so that the height of water level in the flow pond begins
The water demand for meeting downstream user within a predetermined range is maintained eventually；Wherein, it is described according to the preset order of priority according to
Sequence is incremented by the unlocking condition for opening feed pump and the incremental condition of shutting down for closing feed pump of inverted sequence is adopted with the second liquid level gauge
The height of water level in the flow pond collected is associated.
4. tank level control system as claimed in claim 3, which is characterized in that the PLC controller is according to described preset excellent
First order be sequentially incremented by open feed pump unlocking condition be by the height of water level in the flow pond and the more feed pumps it
In the decline threshold value that is respectively correspondingly arranged of feed pump in addition to highest priority compared step by step from big to small, once really
The decline threshold value for making the corresponding setting of the feed pump currently compared is realized at once higher than the height of water level in the flow pond to be opened
It opens；Wherein, the decline threshold value that the feed pump among the more feed pumps in addition to highest priority is respectively correspondingly arranged is
Sequentially successively decrease to be arranged according to the preset order of priority, and the respectively less than described predetermined threshold value.
5. tank level control system as claimed in claim 3, which is characterized in that the PLC controller is according to described preset excellent
First order inverted sequence be incremented by close feed pump shut down condition be by the height of water level in the flow pond and the more feed pumps it
In the rise threshold that is respectively correspondingly arranged of feed pump in addition to highest priority compared step by step from big to small, once really
It makes the corresponding rise threshold being arranged of the feed pump currently compared and realizes pass at once lower than the height of water level in the flow pond
Stop；Wherein, the rise threshold that the feed pump among the more feed pumps in addition to highest priority is respectively correspondingly arranged is
Sequentially it is incremented by be arranged according to the preset order of priority, and is all larger than the predetermined threshold value.
6. tank level control system as described in claim 1, which is characterized in that the PLC controller adjusts the priority most
The revolving speed of high feed pump should be arranged according to the height of water level of the collected reservoir of the first liquid level gauge.
7. tank level control system as claimed in claim 6, which is characterized in that remove highest priority among the more feed pumps
Except feed pump open after revolving speed should all be identical as the revolving speed of the feed pump of the highest priority.
8. a kind of method that tank level control system adjusts user's water demand, which is characterized in that it is including more feed pumps, the
It realizes, the described method comprises the following steps on the tank level control system of one liquidometer, second liquid level gauge and PLC controller:
The tank level control system is arranged in initialization；Wherein, the water inlet of the more feed pumps sinks in reservoir and is discharged
Mouth is connected to flow pond by corresponding pipeline；The first liquid level gauge is sunk in the reservoir；The second liquid level gauge is sunk to
In the flow pond；The PLC controller respectively with the more feed pumps, the first liquid level gauge, the second liquid level gauge
And it is connected in the flow pond for controlling the water gate of user's water, and the PLC controller is preset with more feed pumps
The order of priority of unlatching；
The PLC controller receives user instructions, and the order of priority opened according to preset more feed pumps is to highest priority
Feed pump issue enabled instruction, and it is to be determined go out the highest priority feed pump operating make the water level in the flow pond high
After degree reaches predetermined threshold value, opens the water gate and downstream user offer water is provided, and further adjust the priority most
After the revolving speed of high feed pump is constant speed, situation is changed over time according to the height of water level in the flow pond, described in selection maintains
The feed pump of highest priority operates or on the basis of maintaining the feed pump operating of the highest priority dynamically described in control
Feed pump among more feed pumps in addition to highest priority opens or closes, so that the height of water level in the flow pond is always
Maintain the water demand within a predetermined range to meet downstream user.
9. the method that tank level control system as claimed in claim 8 adjusts user's water demand, which is characterized in that the basis
The height of water level in the flow pond changes over time situation, and selection maintains the feed pump operating of the highest priority or maintaining
It is dynamically controlled among the more feed pumps in addition to highest priority on the basis of the feed pump operating of the highest priority
Feed pump open or close so that the height of water level in the flow pond maintain always within a predetermined range to meet downstream use
The specific steps of the water demand at family include:
When the PLC controller determines that the height of water level in the flow pond increases at any time and increases, then the PLC control
Device judges that the pump-out of the feed pump of the highest priority can satisfy the water demand of downstream user, and further allows institute
The revolving speed for stating the feed pump of highest priority falls to another constant speed and maintains, so that the height of water level in the flow pond is tieed up always
Hold the water demand for meeting downstream user within a predetermined range；
When the PLC controller determine the height of water level in the flow pond increase at any time reduce instead when, then PLC control
Device processed judges that the pump-out of the feed pump of the highest priority is not able to satisfy the water demand of downstream user, can be according to described
Preset order of priority is sequentially incremented by the unlocking condition for opening feed pump and inverted sequence is incremented by and closes feed pump and shut down condition, is tieing up
On the basis of holding the feed pump operating of the highest priority, automatically control among the more feed pumps except highest priority it
Outer feed pump opens or closes, so that the height of water level in the flow pond maintains to use within a predetermined range to meet downstream always
The water demand at family；Wherein, the unlocking condition for opening feed pump and anti-of being sequentially incremented by according to the preset order of priority
Sequence be incremented by close feed pump to shut down condition associated with the height of water level in the collected flow pond of the second liquid level gauge.
10. the method that tank level control system as claimed in claim 8 adjusts user's water demand, which is characterized in that the PLC
The unlocking condition that controller is sequentially incremented by unlatching feed pump according to the preset order of priority is by the water level in the flow pond
Height is carried out with the decline threshold value that the feed pump among the more feed pumps in addition to highest priority is respectively correspondingly arranged
It compares step by step from big to small, once it is determined that going out the corresponding decline threshold value being arranged of the feed pump currently compared is higher than the flow
The height of water level in pond realizes unlatching at once；Wherein, the feed pump among the more feed pumps in addition to highest priority is respectively
The decline threshold value being correspondingly arranged sequentially is successively decreased according to the preset order of priority to be arranged, and respectively less than described default
Threshold value；
The PLC controller is to match by described according to the condition of shutting down that the preset order of priority inverted sequence is incremented by closing feed pump
Flow the rising that the feed pump among the height of water level and the more feed pumps in pond in addition to highest priority is respectively correspondingly arranged
Threshold value is compared step by step from big to small, once it is determined that it is low to go out the corresponding rise threshold being arranged of the feed pump currently compared
Height of water level in the flow pond is realized at once shuts down；Wherein, among the more feed pumps in addition to highest priority
The rise threshold that feed pump is respectively correspondingly arranged sequentially is incremented by according to the preset order of priority to be arranged, and big
In the predetermined threshold value.
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| CN201910066477.2A CN109799848A (en) | 2019-01-24 | 2019-01-24 | A kind of tank level control system and its method for adjusting user's water demand |
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| CN201910066477.2A CN109799848A (en) | 2019-01-24 | 2019-01-24 | A kind of tank level control system and its method for adjusting user's water demand |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112875797A (en) * | 2019-11-29 | 2021-06-01 | 上海柏恩利水处理科技有限责任公司 | Operation control method of oil-water separator |
| CN113701321A (en) * | 2021-07-20 | 2021-11-26 | 江苏联宏智慧能源股份有限公司 | Energy-saving frequency conversion control method for central air-conditioning water pump |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6045331A (en) * | 1998-08-10 | 2000-04-04 | Gehm; William | Fluid pump speed controller |
| CN105259937A (en) * | 2015-11-12 | 2016-01-20 | 华北电力科学研究院有限责任公司 | Boiler makeup water control system and method |
| CN205375208U (en) * | 2016-02-03 | 2016-07-06 | 河南工业职业技术学院 | Singly hold tank level control system |
| CN206889231U (en) * | 2017-04-28 | 2018-01-16 | 广州杰赛科技股份有限公司 | the intelligent control device of drainage system |
| CN206906901U (en) * | 2017-07-11 | 2018-01-19 | 新能（廊坊）能源化工技术服务有限公司 | draining pump control system and drainage system |
| CN108279632A (en) * | 2018-02-09 | 2018-07-13 | 杭州亚大自动化有限公司 | A kind of pumping plant wisdom draining Dispatching Control System |
| CN109139442A (en) * | 2018-08-08 | 2019-01-04 | 华南理工大学广州学院 | Elevator pump priority control method, device and storage medium based on genetic algorithm |
-
2019
- 2019-01-24 CN CN201910066477.2A patent/CN109799848A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6045331A (en) * | 1998-08-10 | 2000-04-04 | Gehm; William | Fluid pump speed controller |
| CN105259937A (en) * | 2015-11-12 | 2016-01-20 | 华北电力科学研究院有限责任公司 | Boiler makeup water control system and method |
| CN205375208U (en) * | 2016-02-03 | 2016-07-06 | 河南工业职业技术学院 | Singly hold tank level control system |
| CN206889231U (en) * | 2017-04-28 | 2018-01-16 | 广州杰赛科技股份有限公司 | the intelligent control device of drainage system |
| CN206906901U (en) * | 2017-07-11 | 2018-01-19 | 新能（廊坊）能源化工技术服务有限公司 | draining pump control system and drainage system |
| CN108279632A (en) * | 2018-02-09 | 2018-07-13 | 杭州亚大自动化有限公司 | A kind of pumping plant wisdom draining Dispatching Control System |
| CN109139442A (en) * | 2018-08-08 | 2019-01-04 | 华南理工大学广州学院 | Elevator pump priority control method, device and storage medium based on genetic algorithm |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112875797A (en) * | 2019-11-29 | 2021-06-01 | 上海柏恩利水处理科技有限责任公司 | Operation control method of oil-water separator |
| CN112875797B (en) * | 2019-11-29 | 2022-12-27 | 福托伟阀门(上海)有限公司 | Operation control method of oil-water separator |
| CN113701321A (en) * | 2021-07-20 | 2021-11-26 | 江苏联宏智慧能源股份有限公司 | Energy-saving frequency conversion control method for central air-conditioning water pump |
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