CN205154588U - Two frequency constant -voltage water supply control system - Google Patents
Two frequency constant -voltage water supply control system Download PDFInfo
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- CN205154588U CN205154588U CN201520821245.0U CN201520821245U CN205154588U CN 205154588 U CN205154588 U CN 205154588U CN 201520821245 U CN201520821245 U CN 201520821245U CN 205154588 U CN205154588 U CN 205154588U
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- frequency variator
- contactor
- control system
- frequency
- water pump
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Abstract
The utility model discloses a two frequency constant -voltage water supply control system, this control system includes: control treater PLC, first converter, second converter, N platform water pump, an ac contactor, the 2nd ac contactor and change over switch. Control treater PLC connect in first converter and second converter are used for controlling thereby change over switch is right first converter switches with the second converter, wherein first converter and second converter parallel connection, the output of first converter connect in an ac contactor, the output of second converter connect in the 2nd ac contactor, and an ac contactor with the 2nd ac contactor links to each other, and the quantity N's of water pump scope is 2 -15's integer.
Description
Technical field
The utility model relates to water system field, particularly a kind of two constant pressure water supply control system.
Background technique
At present, existing constant pressure water supply system is all generally a frequency variator band several main pumps, and after device start, a main pump runs in the control down coversion of frequency variator, when pressure of supply water reach setting value and flow and water balance time, pump motor is stabilized in a certain rotating speed.When water consumption increases, the speed set by frequency variator is accelerated to another stabilized (steady-state) speed by water pump.After variable frequency pump reaches maximum (top) speed, water consumption is still when increasing, and variable frequency pump is switched to power frequency operation by system, and then frequency variator is switched to another main pump converting operation.Circulate with this, until meet pressure of supply water.
When variable frequency pump application discharge reduction, after reducing pump rotary speed, water consumption reduces further, and system is by closedown general pump.Until a surplus variable frequency pump runs.When nobody uses water, system enters sleep state automatically.When system pressure drop to wake pressure up time, water pump puts into operation automatically.
Existing constant pressure water supply system can normal on-the-job satisfaction water requirements when frequency variator fault-free, but when frequency variator break down can not normally run time, variable frequency pump will quit work, and only surplus general pump runs, and system can not change the operation frequency of pump because of the change of water consumption.When water consumption reduces, easily cause the pressure of outlet conduit excessive and booster; When water consumption increases, easily cause pressure of supply water not enough.These all will bring grave danger to whole water system pipeline, have a strong impact on the normal life of people.
In order to solve the problem, the utility model have employed new technological scheme.
Model utility content
The purpose of this utility model is to provide a kind of two constant pressure water supply control system of practicality, this control system can switch between two frequency variators, the normal operation of whole system can be ensured, this control system can detect the runnability of water pump and frequency variator simultaneously, the index broken down if reach, control processor PLC can carry out respective handling, guarantees Security and the validity of whole system work.
In the utility model, provide a kind of two constant pressure water supply control system, this control system comprises: control processor PLC, the first frequency variator, the second frequency variator, N platform water pump, the first A.C. contactor, the second A.C. contactor and throw over switch;
Described control processor PLC is connected to described first frequency variator and the second frequency variator, and for manipulating described throw over switch thus switching described first frequency variator and the second frequency variator, wherein said first frequency variator and the second frequency variator are connected in parallel;
The output terminal of described first frequency variator is connected to described first A.C. contactor, and the output terminal of described second frequency variator is connected to described second A.C. contactor, and described first A.C. contactor is connected with described second A.C. contactor; And
The scope of the quantity N of described water pump is the integer of 2-15.
In another preference, the power input of described first frequency variator and the second frequency variator is all connected to circuit breaker.
In another preference, the external circuit line of described water pump is provided with thermorelay, two A.C. contactors and circuit breaker, and A.C. contactor one end described in one of them is connected with described first A.C. contactor, and the other end is connected with described water pump; And A.C. contactor one end described in another is connected with described thermorelay, the other end is connected with described circuit breaker.
In another preference, described control system also comprises double loop display instrument PSC, and for display system setting pressure and feedback pressure, display instrument PSC one end, wherein said double loop is connected to described first frequency variator, and the other end is connected to described control processor PLC.
In another preference, described control system also comprises the first switch power and second switch power supply, and wherein said first switch power is used for powering to potentiometer, and described second switch power supply is used for powering to distance-transmission pressure gauge.
In another preference, the load circuit of described first frequency variator and the load circuit of described second frequency variator are respectively equipped with auxiliary reclay and tutorial light.
In another preference, the scope of the quantity N of described water pump is the integer of 3-10.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of pair of constant pressure water supply control system in embodiment 1;
Fig. 2 is the structural representation of a kind of pair of constant pressure water supply control system in embodiment 1;
Fig. 3 is the structural representation of a kind of pair of constant pressure water supply control system in embodiment 1;
Fig. 4 is the schematic flow sheet that the control processor PLC in embodiment 1 carries out switching between frequency variator.
Embodiment
The present inventor is through extensive and deep research, develop a kind of two constant pressure water supply control system first, this system adds a standby variable frequency device in the system only having a frequency variator, circuit breaker, A.C. contactor and throw over switch, two frequency variators one of them when breaking down, control processor PLC can switch between two frequency variators, ensure the normal operation of whole system, the runnability of water pump is detected by thermorelay or frequency variator, the runnability of frequency variator is detected by the auxiliary reclay on the load circuit of frequency variator and tutorial light, the index broken down if reach, control processor PLC can carry out respective handling, guarantee that system can operate safely and effectively.
Control system
The utility model provides a kind of two constant pressure water supply control system, and this control system comprises: control processor PLC, the first frequency variator 1, second frequency variator 2, N platform water pump (not shown in FIG.), the first A.C. contactor 3, second A.C. contactor 4 and throw over switch 5.
In the utility model, described control processor PLC is connected to described first frequency variator 1 and the second frequency variator 2, for manipulating described throw over switch 5 thus switching described first frequency variator 1 and the second frequency variator 2, wherein said first frequency variator 1 and the second frequency variator 2 are connected in parallel.
In the utility model, the output terminal of described first frequency variator 1 is connected to described first A.C. contactor 3, the output terminal of described second frequency variator 2 is connected to described second A.C. contactor 4, and described first A.C. contactor 3 is connected with described second A.C. contactor 4.
In the utility model, the scope of the quantity N of described water pump is the integer of 2-15, and preferably, the scope of the quantity N of described water pump is the integer of 3-10.
In the utility model, preferably, the power input of described first frequency variator 1 and the second frequency variator 2 is all connected to circuit breaker 6.
In another preference, the external circuit line of described water pump is provided with thermorelay 7, two A.C. contactors 8 and circuit breaker 6, and A.C. contactor 8 one end described in one of them is connected with described first A.C. contactor 3, and the other end is connected with described water pump; And A.C. contactor 8 one end described in another is connected with described thermorelay 7, the other end is connected with described circuit breaker 6.
In another preference, described control system also comprises double loop display instrument PSC, for display system setting pressure and feedback pressure, display instrument PSC one end, wherein said double loop is connected to described first frequency variator 1, and the other end is connected to described control processor PLC.
In another preference, described control system also comprises the first switch power 9 and second switch power supply 10, wherein said first switch power 9 is for giving potentiometer (RT, not shown in FIG.) power supply, described second switch power supply 10 is for giving distance-transmission pressure gauge (PT, not shown in FIG.) power supply.
In another preference, the load circuit of described first frequency variator 1 and the load circuit of described second frequency variator 2 are respectively equipped with auxiliary reclay 11 and tutorial light 12.
In another preference, in described control processor PLC, be provided with rotation time program, for carrying out exchange-column shift between frequency variator when the first frequency variator 1 and the second frequency variator 2 described in routine use.
Major advantage of the present utility model comprises:
A () this control system is provided with a standby variable frequency device, two frequency variators one of them when breaking down, control processor PLC can switch between two frequency variators, can ensure the normal operation of whole system;
B the existing module of () this system can detect the runnability of water pump and frequency variator, if reach the index broken down, control processor PLC can carry out respective handling, guarantees that system can operate safely and effectively;
Can time in turn switching being carried out during the frequency variator of this system of (c) routine use, avoiding causing this frequency variator aging impaired because using a frequency variator for a long time, thus the normal work of influential system.
Below in conjunction with specific embodiment, set forth the utility model further.Should be understood that these embodiments are only not used in restriction scope of the present utility model for illustration of the utility model.The experimental technique of unreceipted actual conditions in the following example, usually conveniently condition, or according to the condition that manufacturer advises.
It should be noted that, in the claim and specification of this patent, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or control panel, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element " being comprised " limited by statement, and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
Embodiment 1
The present embodiment adopts control system as Figure 1-3 and carries out confession water management to this system.As Figure 1-3, this control system comprises: control processor PLC, the first frequency variator 1, second frequency variator 2,3 water pumps, the first A.C. contactor 3, second A.C. contactor 4 and throw over switch 5.
In the present embodiment, described control processor PLC is connected to described first frequency variator 1 and the second frequency variator 2, and wherein said first frequency variator 1 and the second frequency variator 2 are connected in parallel.
The output terminal of described first frequency variator 1 is connected to described first A.C. contactor 3, the output terminal of described second frequency variator 2 is connected to described second A.C. contactor 4, wherein said first A.C. contactor 3 is connected with described second A.C. contactor 4, the power input of described first frequency variator 1 and the second frequency variator 2 is all connected to circuit breaker 6, and the load circuit of described first frequency variator 1 and the load circuit of the second frequency variator 2 are respectively equipped with auxiliary reclay 11 and tutorial light 12.
The external circuit line of described water pump is provided with thermorelay 7, two A.C. contactors 8 and circuit breaker 6, A.C. contactor 8 one end described in one of them is connected with described first A.C. contactor 3, the other end is connected with described water pump, described in another, A.C. contactor 8 one end is connected with described thermorelay 7, and the other end is connected with described circuit breaker 6.
Described control system also comprises double loop display instrument PSC, and display instrument PSC one end, described double loop is connected to described first frequency variator 1, and the other end is connected to described control processor PLC.
Described control system also comprises the first switch power 9 and second switch power supply 10, and is provided with rotation time program in described control processor PLC.
In the present embodiment, standby usage frequency variator is selected by throw over switch 5, if select the first frequency variator 1 primary, second frequency variator 2 is for subsequent use, by PLC programming, first A.C. contactor 3 coil obtains electric, first A.C. contactor 3 main contact adhesive, first frequency variator 1 puts into operation, when the first frequency variator 1 breaks down, first A.C. contactor 3 dead electricity, main contact disconnects, second A.C. contactor 4 obtains electric simultaneously, main contact adhesive, second frequency variator 2 puts into operation, in the process, there is not action in the A.C. contactor 8 controlling water pump, water pump keeps original working state, variable frequency pump is when the second frequency variator 2 puts into operation, frequency increases gradually, until when pressure of supply water reaches setting pressure, variable frequency pump is stabilized in a certain rotating speed, System recover normally runs.When selection second frequency variator 2 is primary, when the first frequency variator 1 is for subsequent use, working principle is consistent.
The present embodiment carries out confession water management to this system, and method is as follows:
A () provides described constant pressure water supply control system,
And in described control system, the external circuit line of described water pump is provided with thermorelay 7, two A.C. contactors 8 and circuit breaker 6, wherein described A.C. contactor 8 one end is connected to described first A.C. contactor 3, the other end is connected to described water pump, A.C. contactor described in another 8 one end is connected to described thermorelay 7, and the other end is connected to described circuit breaker 6;
The power input of described first frequency variator 1 and the second frequency variator 2 is all connected to circuit breaker 6; Further, the power supply of described first frequency variator 1 and/or the power supply of the second frequency variator 2 is controlled by described circuit breaker 6;
In described control system, be provided with double loop display instrument PSC, display instrument PSC one end, wherein said double loop is connected to described first frequency variator 1, and the other end is connected to described control processor PLC; And setting pressure and the feedback pressure of described system is shown by described double loop display instrument PSC;
Potentiometer, distance-transmission pressure gauge, the first switch power 9 and second switch power supply 10 is provided with in described control system; Further, power to described potentiometer by described first switch power 9, and power to described distance-transmission pressure gauge by described second switch power supply 10;
B (), when water pump power frequency operation, detects the runnability of described water pump by described thermorelay 7, when described thermorelay 7 detects that the electric current of described water pump exceedes setting current value, stop described water pump operate and report to the police; And/or when described pump variable frequency runs, the runnability of described water pump is detected by described first frequency variator 1 or the second frequency variator 2, when described first frequency variator 1 or the second frequency variator 2 detect that the electric current of described water pump is greater than 20% of rated current, described water pump is stopped to operate and report to the police;
(c) when described first frequency variator 1 or the second frequency variator 2 break down switch and time in turn switch described first frequency variator 1 and the second frequency variator 2 time, utilize described control processor PLC to carry out switching between frequency variator;
Wherein, described failover comprises: when the first frequency variator 1 worked or the second frequency variator 2 break down, by being arranged at the tutorial light 12 on the load circuit of described first frequency variator 1 or the second frequency variator 2, send trouble signal, and undertaken switching between frequency variator by described control processor PLC; And/or based on the rotation time program arranged in described control processor PLC, switch described first frequency variator 1 and the second frequency variator 2, specific works flow process schematic diagram as shown in Figure 4.
Person skilled carries out follow-up investigation to the system of on-the-spot 10 cover embodiments 1 in one-year age, obtains some results as follows:
The average total degree that dual frequency converter in this system breaks down is 0.3 time, and primary fault on average often occurs needs be 5 days repair time, and rate of fault is 0.41%, and working efficiency is 100%, and ease of use is strong.
Comparative example 1
Comparative example 1 adopts two independently water systems (two frequency variators independently in water system and water pump size are in the same manner as in Example 1), and wherein a system is single frequency variator+1 water pump, and b system is single frequency variator+2 water pumps.
Person skilled carries out follow-up investigation to on-the-spot 10 cover a systems and 10 cover b systems respectively in one-year age, obtains some results as follows:
The average time that single frequency variator in a system breaks down is 0.6 time, and primary fault on average often occurs needs be 5 days repair time, and rate of fault is 0.82%, and working efficiency is 99.18%, and ease of use is stronger;
The average time that single frequency variator in b system breaks down is 0.6 time, and primary fault on average often occurs needs be 5 days repair time, and rate of fault is 0.82%, and working efficiency is 99.18%, and ease of use is stronger.
Comparative example 2
Comparative example 2 adopts c system (frequency variator in c system and water pump size are in the same manner as in Example 1), and wherein c system is single frequency variator+3 water pumps.
Person skilled carries out follow-up investigation to on-the-spot 10 cover c systems in one-year age, obtains some results as follows:
The average time that single frequency variator in c system breaks down is 0.8 time, and primary fault on average often occurs needs be 5 days repair time, and rate of fault is 1.09%, and working efficiency is 98.91%, and ease of use is medium.
The present embodiment 1 is known compared to comparative example 1, and when a frequency variator band 1-2 platform pump operation, rate of fault is more or less the same, and slightly improves.Though the whole year has a frequency variator that 0.3 fault occurred in embodiment 1, between age at failure, system is enabled standby variable frequency device and still can normally be run, and within annual 365 days, continue normal work, therefore working efficiency reaches 100%.And 0.6 fault occurred frequency variator in comparative example 1, having 3 days the whole year can not normal water supply, and the rate of fault of frequency variator is 0.82%, higher than in embodiment 1 0.41%.Working efficiency is 99.18% lower than 100% in embodiment 1.
The present embodiment 1 is known compared to comparative example 2, and when frequency variator model, pump size number of units are identical, use a frequency variator that 0.8 fault occurred, having 4 days the whole year can not normal water supply.Increasing a standby variable frequency device can make the rate of fault in comparative example 2 drop to 0.41% from 1.09%, and working efficiency reaches 100%, greatly reduces the rate of fault of frequency variator, improves the working efficiency of system.
The all documents mentioned at the utility model are quoted as a reference all in this application, are just quoted separately as a reference as each section of document.In addition should be understood that those skilled in the art can make various changes or modifications the utility model, and these equivalent form of values fall within the application's appended claims limited range equally after having read above-mentioned instruction content of the present utility model.
Claims (7)
1. a two constant pressure water supply control system, it is characterized in that, this control system comprises: control processor PLC, the first frequency variator (1), the second frequency variator (2), N platform water pump, the first A.C. contactor (3), the second A.C. contactor (4) and throw over switch (5);
Described control processor PLC is connected to described first frequency variator (1) and the second frequency variator (2), for manipulating described throw over switch (5) thus switching described first frequency variator (1) and the second frequency variator (2), wherein said first frequency variator (1) and the second frequency variator (2) are connected in parallel;
The output terminal of described first frequency variator (1) is connected to described first A.C. contactor (3), the output terminal of described second frequency variator (2) is connected to described second A.C. contactor (4), and described first A.C. contactor (3) is connected with described second A.C. contactor (4); And
The scope of the quantity N of described water pump is the integer of 2-15.
2. control system according to claim 1, is characterized in that, described first frequency variator (1) and the power input of the second frequency variator (2) are all connected to circuit breaker (6).
3. control system according to claim 1, it is characterized in that, the external circuit line of described water pump is provided with thermorelay (7), two A.C. contactors (8) and circuit breaker (6), A.C. contactor described in one of them (8) one end is connected with described first A.C. contactor (3), and the other end is connected with described water pump; And A.C. contactor described in another (8) one end is connected with described thermorelay (7), the other end is connected with described circuit breaker (6).
4. control system according to claim 1, it is characterized in that, described control system also comprises double loop display instrument PSC, for display system setting pressure and feedback pressure, display instrument PSC one end, wherein said double loop is connected to described first frequency variator (1), and the other end is connected to described control processor PLC.
5. control system according to claim 1, it is characterized in that, described control system also comprises the first switch power (9) and second switch power supply (10), wherein said first switch power (9) is for powering to potentiometer, and described second switch power supply (10) is for powering to distance-transmission pressure gauge.
6. control system according to claim 1, it is characterized in that, the load circuit of described first frequency variator (1) and the load circuit of described second frequency variator (2) are respectively equipped with auxiliary reclay (11) and tutorial light (12).
7. control system according to claim 1, is characterized in that, the scope of the quantity N of described water pump is the integer of 3-10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520821245.0U CN205154588U (en) | 2015-10-21 | 2015-10-21 | Two frequency constant -voltage water supply control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520821245.0U CN205154588U (en) | 2015-10-21 | 2015-10-21 | Two frequency constant -voltage water supply control system |
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| CN205154588U true CN205154588U (en) | 2016-04-13 |
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| CN201520821245.0U Active CN205154588U (en) | 2015-10-21 | 2015-10-21 | Two frequency constant -voltage water supply control system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106609745A (en) * | 2015-10-21 | 2017-05-03 | 上海连成（集团）有限公司 | Double-variable-frequency constant-pressure water supply control system and method |
| CN109947041A (en) * | 2019-03-15 | 2019-06-28 | 广东萨米特陶瓷有限公司 | Roller way kiln transmission control part divides intelligent standby system |
-
2015
- 2015-10-21 CN CN201520821245.0U patent/CN205154588U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106609745A (en) * | 2015-10-21 | 2017-05-03 | 上海连成（集团）有限公司 | Double-variable-frequency constant-pressure water supply control system and method |
| CN106609745B (en) * | 2015-10-21 | 2020-04-03 | 上海连成（集团）有限公司 | Double-frequency-conversion constant-pressure water supply control system and control method |
| CN109947041A (en) * | 2019-03-15 | 2019-06-28 | 广东萨米特陶瓷有限公司 | Roller way kiln transmission control part divides intelligent standby system |
| CN109947041B (en) * | 2019-03-15 | 2020-08-28 | 广东萨米特陶瓷有限公司 | Intelligent standby system of transmission control part of roller kiln |
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