CN203768997U - Variable-flow and stable-pressure water supply device - Google Patents
Variable-flow and stable-pressure water supply device Download PDFInfo
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- CN203768997U CN203768997U CN201420112066.5U CN201420112066U CN203768997U CN 203768997 U CN203768997 U CN 203768997U CN 201420112066 U CN201420112066 U CN 201420112066U CN 203768997 U CN203768997 U CN 203768997U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 82
- 239000008400 supply water Substances 0.000 claims description 97
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 238000010586 diagram Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 230000000284 resting effect Effects 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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Abstract
The utility model relates to a variable-flow and stable-pressure water supply device which comprises a power access end, a frequency converter and at least two water supply control devices. The water supply control devices are mutually connected in parallel, the power access end is connected at one end of the parallelly connected water supply control devices, the frequency converter is connected at the other end of the parallelly connected water supply control devices, and the power access end is connected with the frequency converter. The variable-flow and stable-pressure water supply device can automatically start and stop a plurality of water supply pumps by the aid of power frequency to meet pressure adjustment within a wide range.
Description
Technical field
The utility model relates to a kind of unsteady flow pressure-stabilizing water supply equipment, relates in particular to a kind of unsteady flow pressure-stabilizing water supply equipment by many supply-water pump operations of a Frequency Converter Control.
Background technology
Traditional unsteady flow pressure-stabilizing water supply equipment, drives one or more supply-water pump to move by a frequency converter, the pressure that frequency converter is set according to user, and supply-water pump of frequency control, meet user's water pressure demand, but this equipment tends to exist following problem:
No matter 1 is that a frequency converter drives one or many supply-water pumps, when operation, only have a supply-water pump operation, other supply-water pump is standby, a supply-water pump frequency control, adjustable pressure scope is little, when running into water use peak, during the phase, by water pressure, does not catch up with;
2, standby supply-water pump can not automatically switch to current operation supply-water pump, and needing regular people is manual switchover.
Utility model content
In order to solve the above-mentioned technical problem existing in background technology, the utility model provides a kind of power frequency automatically to open/stop the pressure controlled unsteady flow pressure-stabilizing water supply equipment that many supply-water pumps meet wide region.
Technical solution of the present utility model is: the utility model provides a kind of unsteady flow pressure-stabilizing water supply equipment, and its special character is: described unsteady flow pressure-stabilizing water supply equipment comprises power access end, frequency converter and two-way water supply control apparatus at least; Described at least two-way water supply control apparatus is parallel with one another; One end access power input of the water supply control apparatus after described parallel connection, other end access frequency converter; Described power input access frequency converter.
Every road water supply control apparatus includes the first contactor, the second contactor, contactor is mechanical interlocked and supply-water pump motor; Described frequency converter is by the first contactor access supply-water pump motor; Described power input is by the second contactor access supply-water pump motor; Described the first contactor is by mechanical interlocked access the second contactor of contactor.
Above-mentioned every road water supply control apparatus also includes supply-water pump power frequency thermal relay; Described the second contactor is by supply-water pump power frequency thermal relay access supply-water pump motor.
Above-mentioned every road water supply control apparatus also includes power frequency circuit breaker; Described power input accesses the second contactor by power frequency circuit breaker.
Above-mentioned unsteady flow pressure-stabilizing water supply equipment also comprises frequency conversion circuit breaker, and described power input is by frequency conversion circuit breaker access frequency converter.
The utility model has the advantages that:
The utility model provides a kind of unsteady flow pressure-stabilizing water supply equipment, and this supply equipment can be set demand pressure value according to the needs by water pressure, by pressure transmitter, detects supply-water pump outlet header actual pressure; The actual pressure value of detection and setup pressure value are carried out to PID computing, and the frequency output using operation result as frequency converter, changes the rotating speed of supply-water pump, thereby changes pipeline pressure, and the actual pressure of pipeline is stabilized near setup pressure value.When variable frequency water supply pump operation is to maximum setpoint frequency, in the time of still can not meeting pressure of supply water requirement, automatically standby supply-water pump of power frequency startup, in the time of still can not meeting, second standby supply-water pump of power frequency startup, the 3rd standby supply-water pump etc., the like, until meet water demand pressure, in water supply, pipeline pressure fluctuation among a small circle regulates by variable frequency water supply pump.When water demand reduces, first reduce the running frequency of variable frequency water supply pump, when frequency is reduced to minimum setpoint frequency, when still pressure of supply water is larger, the supply-water pump of power frequency operation will be stopped successively the inverted sequence when starting, the supply-water pump that is last power frequency startup stops at first, the like, till the supply-water pump of power frequency operation has been stopped.During without water demand, the frequency of frequency converter reduces, and after frequency is low to moderate setting value, frequency converter blocks output, enters resting state, and all supply-water pumps all stop.While having water demand, variable frequency water supply pump starts operation automatically.Unsteady flow pressure-stabilizing water supply equipment provided by the utility model can be realized by a supply-water pump converting operation, and according to the demand of pressure of supply water, power frequency opens/stop many supply-water pumps automatically, and the pressure that meets wide region regulates; The standby supply-water pump that can regularly automatically switch is current converting operation pump, makes many supply-water pump rotation converting operations; Can excise fault supply-water pump, cut supply-water pump, no longer power frequency operation, no longer switches to current converting operation supply-water pump.
Accompanying drawing explanation
Fig. 1 is the circuit connection diagram of the power section of unsteady flow pressure-stabilizing water supply equipment provided by the utility model;
Fig. 2 is the control section wiring schematic diagram of unsteady flow pressure-stabilizing water supply equipment provided by the utility model.
The specific embodiment
The utility model provides a kind of unsteady flow pressure-stabilizing water supply equipment, and this unsteady flow pressure-stabilizing water supply equipment comprises power access end, frequency converter and two-way water supply control apparatus at least; At least two-way water supply control apparatus is parallel with one another; One end access power input of the water supply control apparatus after parallel connection, other end access frequency converter; Power input access frequency converter.
Every road water supply control apparatus includes the first contactor, the second contactor, contactor is mechanical interlocked and supply-water pump motor; Frequency converter is by the first contactor access supply-water pump motor; Power input is by the second contactor access supply-water pump motor; The first contactor is by mechanical interlocked access the second contactor of contactor.
Every road water supply control apparatus also includes supply-water pump power frequency thermal relay; The second contactor is by supply-water pump power frequency thermal relay access supply-water pump motor.
Every road water supply control apparatus also includes power frequency circuit breaker; Power input accesses the second contactor by power frequency circuit breaker.
Unsteady flow pressure-stabilizing water supply equipment also comprises frequency conversion circuit breaker, and power input is by frequency conversion circuit breaker access frequency converter.
The utility model operating principle is:
User, according to the needs by water pressure, sets demand pressure value.By pressure transmitter, detect supply-water pump outlet header actual pressure.The actual pressure value of detection and setup pressure value are carried out to PID computing, and the frequency output using operation result as frequency converter, changes the rotating speed of supply-water pump, thereby changes pipeline pressure, and the actual pressure of pipeline is stabilized near setup pressure value.When variable frequency water supply pump operation is to maximum setpoint frequency, in the time of still can not meeting pressure of supply water requirement, automatically standby supply-water pump of power frequency startup, in the time of still can not meeting, second standby supply-water pump of power frequency startup, the 3rd standby supply-water pump etc., the like, until meet water demand pressure, in water supply, pipeline pressure fluctuation among a small circle regulates by variable frequency water supply pump.When water demand reduces, first reduce the running frequency of variable frequency water supply pump, when frequency is reduced to minimum setpoint frequency, when still pressure of supply water is larger, the supply-water pump of power frequency operation will be stopped successively the inverted sequence when starting, the supply-water pump that is last power frequency startup stops at first, the like, till the supply-water pump of power frequency operation has been stopped.During without water demand, the frequency of frequency converter reduces, and after frequency is low to moderate setting value, frequency converter blocks output, enters resting state, and all supply-water pumps all stop.While having water demand, variable frequency water supply pump starts operation automatically.
After variable frequency water supply pump operation, start timing, when timing time arrives after setting-up time, stop this supply-water pump, using next supply-water pump as current variable frequency pump, also start operation.After if next pump just at power frequency operation, waits for that this pump stops, then be switched to the startup of frequency conversion state.
In all supply-water pumps, if there is which platform failure of pump, only signal corresponding to this pump need be broken from frequency converter digital input end, this pump will be not can power frequency startup, can not switch to current variable frequency pump yet, this pump can not start operation all the time.After if this pump keeps in repair, the signal that this pump is corresponding to be connected from frequency converter digital input end, this pump just can normally move.
Automatically open/stop many supply-water pumps, increased pressure adjustable range, be particularly suitable for water supply volume time to peak and concentrate, the occasion that water supply volume is large.In the larger and less period of water supply volume, all can effectively stablize pipeline pressure, meet user and use water pressure requirement.And when unmanned water, automatically stopping supply-water pump, energy-saving effect is obvious.
Can be according to the time of setting, automatic switchover variable frequency water supply pump, has effectively prevented the supply-water pump long time running that has, the long-time out-of-operation state of some supply-water pumps.Be particularly suitable for original water hardness large, the occasion of easy fouling, a supply-water pump does not turn round for a long time, easily fouling on pipeline or impeller of pump.
When supply-water pump has fault to produce, can excise by knob manual operation, the supply-water pump after excision is not restarted, and waits after repairing and uses recovering.
Referring to Fig. 1, the utility model provides a kind of unsteady flow pressure-stabilizing water supply equipment, the power section wiring diagram of this supply equipment:
A frequency converter can connect many pumps, and Fig. 1 is exemplified as a frequency converter and connects two supply-water pumps.By contactor (KM1～KM4) break-make, realize frequency conversion and the power frequency switchover operation of pump.Contactor KM1 connects as 1# supply-water pump converting operation, and KM2 connects as 1# supply-water pump power frequency operation, and contactor KM3 connects as 2# supply-water pump converting operation, and KM4 connects as 2# supply-water pump power frequency operation.In order to prevent the motor connection side access power supply of frequency converter, KM1-KM2, KM3-KM4 adopt contactor mechanical interlocked, and KM1 and KM2 access contactor are mechanical interlocked, and it can not be connected simultaneously, KM3 and KM4 access contactor are mechanical interlocked, and it can not be connected simultaneously.At synchronization, can only there is a pump frequency conversion operation, when all KM1 are different from KM3, connect.QF1 is frequency conversion circuit breaker, and QF2 is power frequency circuit breaker, and FR1 is 1# supply-water pump power frequency thermal relay, and FR2 is 2# supply-water pump power frequency thermal relay.Power frequency refers to the frequency of the AC power of industrial use, unit hertz (Hz).
Referring to Fig. 2, be the utility model control section wiring diagram:
Frequency converter analog input end AI1 is pressure given input port, and AI2 is pipeline pressure transmitter measuring-signal input port.
The enabling signal that digital quantity input DI1 is frequency converter, when this port is connected, device start operation, during disconnection, equipment is out of service.Digital quantity input DI2 is 1# supply-water pump useful signal, when this port disconnects, is 1# supply-water pump fault, and 1# supply-water pump is not restarted, and is that 1# supply-water pump is normal during connection.DI3 is 2# supply-water pump useful signal, when this port disconnects, is 2# supply-water pump fault, and 2# supply-water pump is not restarted, and is that 2# supply-water pump is normal during connection.If while having more supply-water pumps, be linked into successively other interface etc.
Digital output end DO1 is 1# supply-water pump run signal output, when DO1 output is connected, starts 1# supply-water pump, and DO1 stops 1# supply-water pump while disconnecting.DO2 is 2# supply-water pump run signal output, when DO2 output is connected, starts 2# supply-water pump, and DO2 stops 2# supply-water pump while disconnecting.If while having more supply-water pumps, be linked into successively other interface etc.
If 1# supply-water pump is current variable frequency pump, after device start, DO1 connects, and KA1 is charged, the charged connection of KM1, and 1# supply-water pump converting operation, if a pump can not meet water requirements, DO2 connects, KA2 is charged, the charged connection of KM4,2# supply-water pump power frequency operation.If 2# supply-water pump is current variable frequency pump, after device start, DO2 connects, and KA2 is charged, the charged connection of KM3, and 2# supply-water pump converting operation, if a pump can not meet water requirements, DO1 connects, KA1 is charged, the charged connection of KM2,1# supply-water pump power frequency operation.
Claims (5)
1. a unsteady flow pressure-stabilizing water supply equipment, is characterized in that: described unsteady flow pressure-stabilizing water supply equipment comprises power access end, frequency converter and two-way water supply control apparatus at least; Described at least two-way water supply control apparatus is parallel with one another; One end access power input of the water supply control apparatus after described parallel connection, other end access frequency converter; Described power input access frequency converter.
2. unsteady flow pressure-stabilizing water supply equipment according to claim 1, is characterized in that: every road water supply control apparatus includes the first contactor, the second contactor, contactor is mechanical interlocked and supply-water pump motor; Described frequency converter is by the first contactor access supply-water pump motor; Described power input is by the second contactor access supply-water pump motor; Described the first contactor is by mechanical interlocked access the second contactor of contactor.
3. unsteady flow pressure-stabilizing water supply equipment according to claim 2, is characterized in that: described every road water supply control apparatus also includes supply-water pump power frequency thermal relay; Described the second contactor is by supply-water pump power frequency thermal relay access supply-water pump motor.
4. according to the unsteady flow pressure-stabilizing water supply equipment described in claim 2 or 3, it is characterized in that: described every road water supply control apparatus also includes power frequency circuit breaker; Described power input accesses the second contactor by power frequency circuit breaker.
5. unsteady flow pressure-stabilizing water supply equipment according to claim 4, is characterized in that: described unsteady flow pressure-stabilizing water supply equipment also comprises frequency conversion circuit breaker, and described power input is by frequency conversion circuit breaker access frequency converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420112066.5U CN203768997U (en) | 2014-03-12 | 2014-03-12 | Variable-flow and stable-pressure water supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420112066.5U CN203768997U (en) | 2014-03-12 | 2014-03-12 | Variable-flow and stable-pressure water supply device |
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| Publication Number | Publication Date |
|---|---|
| CN203768997U true CN203768997U (en) | 2014-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420112066.5U Expired - Lifetime CN203768997U (en) | 2014-03-12 | 2014-03-12 | Variable-flow and stable-pressure water supply device |
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| CN (1) | CN203768997U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105971054A (en) * | 2016-05-24 | 2016-09-28 | 安徽恒远自动化仪表有限公司 | Constant-pressure variable circular water supply control system |
| CN106049612A (en) * | 2016-05-24 | 2016-10-26 | 安徽恒远自动化仪表有限公司 | Multi-pump parallel-connected variable-frequency constant-pressure variable-amount water supply control system |
| CN106836380A (en) * | 2016-12-22 | 2017-06-13 | 广州市白云泵业集团有限公司 | A kind of intelligent frequency-conversion constant pressure adds water supplying pump device |
-
2014
- 2014-03-12 CN CN201420112066.5U patent/CN203768997U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105971054A (en) * | 2016-05-24 | 2016-09-28 | 安徽恒远自动化仪表有限公司 | Constant-pressure variable circular water supply control system |
| CN106049612A (en) * | 2016-05-24 | 2016-10-26 | 安徽恒远自动化仪表有限公司 | Multi-pump parallel-connected variable-frequency constant-pressure variable-amount water supply control system |
| CN106049612B (en) * | 2016-05-24 | 2018-04-03 | 安徽恒远自动化仪表有限公司 | A kind of multiple ontology frequency-changing pressure stabilizing variable water management system |
| CN105971054B (en) * | 2016-05-24 | 2018-04-06 | 安徽恒远自动化仪表有限公司 | A kind of constant-pressure variable circulates shape water management system |
| CN106836380A (en) * | 2016-12-22 | 2017-06-13 | 广州市白云泵业集团有限公司 | A kind of intelligent frequency-conversion constant pressure adds water supplying pump device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140813 |
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| CX01 | Expiry of patent term |