CN206220174U - A kind of failure emergency circuit of Frequency Conversion And Timing Water-Supplying Equipment - Google Patents
A kind of failure emergency circuit of Frequency Conversion And Timing Water-Supplying Equipment Download PDFInfo
- Publication number
- CN206220174U CN206220174U CN201621281257.XU CN201621281257U CN206220174U CN 206220174 U CN206220174 U CN 206220174U CN 201621281257 U CN201621281257 U CN 201621281257U CN 206220174 U CN206220174 U CN 206220174U
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- China
- Prior art keywords
- normally opened
- normally
- pressure switch
- emergency circuit
- frequency conversion
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- Expired - Fee Related
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 16
- 230000005611 electricity Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000008400 supply water Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- Control Of Positive-Displacement Pumps (AREA)
Abstract
The utility model discloses a kind of failure emergency circuit of Frequency Conversion And Timing Water-Supplying Equipment, including main control circuit and emergency circuit, emergency circuit includes tie point parallel with one another, the second branch road and the 3rd branch road, tie point includes PLC normally opened contacts, the output end series connection KA1 auxiliary relays of PLC normally opened contacts；Second branch road includes KA1 normally-closed contacts, the normally closed pressure switch S1 of the upper limit, the normally opened pressure switch S2 of lower limit and the KA2 auxiliary relays of series connection, the normally closed pressure switch S1 of the upper limit and the normally opened pressure switch S2 of lower limit are electrically connected with electro connecting pressure gauge, and the normally opened pressure switch S2 of lower limit is in parallel with the normally opened contacts of KA2 first；3rd branch road includes the normally opened contacts of KA2 second and contactor KM1 of series connection, and contactor KM1 controls the keying of standby motor.This structure can be transformed existing equipment, time saving and energy saving；Stress control is accurate；Energy saving；Protection comprehensively is realized to standby motor.
Description
Technical field
The utility model belongs to supply equipment technical field, and in particular to one kind event occurs for Frequency Conversion And Timing Water-Supplying Equipment
The emergency circuit of stand-by equipment is provided during barrier.
Background technology
Current municipal water supply and building to supply water and use Frequency Conversion And Timing Water-Supplying Equipment more, many in the market using microcomputer control
Frequency Conversion And Timing Water-Supplying Equipment, the control core of microcomputer controlled variable-frequency speed-regulating supply equipment is PLC or single-chip microcomputer, when PLC or monolithic
During machine failure, equipment is stopped；The control core of the Frequency Conversion And Timing Water-Supplying Equipment that digital frequency conversion controller is controlled is main frame, when
Equipment cannot work when main frame breaks down, and the domestic water for giving people brings very big hidden danger.Therefore need to enter water system
Row is improved.
The content of the invention
Goal of the invention：The utility model purpose is in view of the shortcomings of the prior art, there is provided a kind of improvement cost is low, peace
The failure emergency circuit of overall coefficient Frequency Conversion And Timing Water-Supplying Equipment high and reliable.
Technical scheme：A kind of failure emergency circuit of Frequency Conversion And Timing Water-Supplying Equipment described in the utility model, including master control
Circuit processed and emergency circuit, the main control circuit include main road threephase switch, main road contactor and main road relay, the master
Control circuit end connection work drive motor, emergency circuit is overlapped between the main road contactor and main road relay, and its feature exists
In：The emergency circuit includes tie point parallel with one another, the second branch road and the 3rd branch road, and the tie point includes PLC
Normally opened contact, the output end series connection KA1 auxiliary relays of the PLC normally opened contacts；Second branch road includes that the KA1 of series connection is normally closed and touches
The normally closed pressure switch S1 of point, the upper limit, the normally opened pressure switch S2 of lower limit and KA2 auxiliary relays, the normally closed pressure switch of the upper limit
S1 and the normally opened pressure switch S2 of lower limit are electrically connected with electro connecting pressure gauge, the normally opened pressure switch S2 of lower limit and KA2 first
Normally opened contact is in parallel；3rd branch road includes the normally opened contacts of KA2 second and contactor KM1 of series connection, the contactor KM1 controls
The keying of preparation motor.
Further, it is to avoid damages of the circuit Dun Lu to work drive motor, connect between the main control circuit and emergency circuit
There is motor breaking device.
Further, the keying of the normally opened contacts of the KA2 first and the normally opened contacts of KA2 second is aided in relay by the KA2
Device is controlled, and realizes opening and closing synchronously.
Further, the main control circuit uses triangle connected mode with work drive motor.
Further, to avoid damage during circuit overloads to standby motor, the emergency circuit outlet line is provided with
Thermal overload relay normally-closed contact FR1.
Beneficial effect：（1）The utility model structure can be transformed existing equipment, time saving and energy saving, cost-effective；
（2）Main road equipment control core is damaged, and equipment remains to maintain to supply water, and reduces the negative effect that water shortage is brought；
（3）Achievable pressure is precisely controlled, and keeps pressure stability, it is ensured that pressure is not too low, not superpressure；
（4）Low pressure limit starts reserve pump during system operation, and the upper limit stops reserve pump operation, energy saving；
（5）Protection comprehensively can be realized to standby motor, it is to avoid the motor damage brought because of excessively stream, the problems such as overload, significantly
Extend the physical life of reserve pump.
Brief description of the drawings
Fig. 1 is overall structure diagram of the present utility model.
Specific embodiment
Technical solutions of the utility model are described in detail below by accompanying drawing, but protection domain of the present utility model
It is not limited to the embodiment.
Embodiment：A kind of failure emergency circuit of Frequency Conversion And Timing Water-Supplying Equipment, including main control circuit and emergency circuit, institute
Stating main control circuit includes main road threephase switch FR2, the main road contactor KM2 and main road relay QF1 of mutually concatenation, the master
Control circuit end is using triangle connected mode connection work drive motor M, the main road contactor KM2 and main road relay QF1
Between overlap emergency circuit, motor breaking device FU1 is connected between main control circuit and emergency circuit；The emergency circuit includes phase
Mutual tie point in parallel, the second branch road and the 3rd branch road, the tie point include PLC normally opened contacts, and the PLC is normally opened to be touched
The output end series connection KA1 auxiliary relays of point；Second branch road include series connection KA1 normally-closed contacts, the normally closed pressure switch S1 of the upper limit,
The normally opened pressure switch S2 of lower limit and KA2 auxiliary relays, the normally closed pressure switch S1 of the upper limit and normally opened pressure switch S2 of lower limit
Electrically connected with electro connecting pressure gauge, the normally opened pressure switch S2 of lower limit is in parallel with the normally opened contacts of KA2 first；Described 3rd
Road includes that the normally opened contacts of KA2 second of series connection and contactor KM1, the contactor KM1 control the keying of standby motor；KA2
The keying of one normally opened contact and the normally opened contacts of KA2 second is controlled by the KA2 auxiliary relays, realizes opening and closing synchronously；Answer urgent telegram
Road outlet line is provided with thermal overload relay normally-closed contact FR1.
The concrete operating principle and process of this structure are as follows：
As shown in figure 1, PLC normally opened contacts are kept powered on output, when PLC normally runs, relay KA1 when PLC is powered
Coil obtains electric, and relay KA1 normally-closed contacts disconnect, and relay KA2 must not be electric, and contactor KM1 is failure to actuate, and reserve pump is not transported
Turn, equipment is run by by PLC setting programs.
When PLC failures, PLC exports all off, relay KA1 dead electricity, and relay KA1 normally-closed contacts recover closure,
When threshold pression of the work drive motor outlet pressure less than setting, the normally opened pressure switch S2 closures of electro connecting pressure gauge lower limit, after
Electrical equipment KA2 coils obtain electric, and the normally opened contacts of KA2 first and the normally opened contacts of KA2 second are closed, and realize self-locking, and contactor KM1 is dynamic
Make, reserve pump starts running, equipment outlet pressure rises.
When outlet pressure reaches the upper limit, the normally closed pressure switch S1 of the electro connecting pressure gauge upper limit disconnects, and relay KA2 loses
Electricity, relay normally open contact disconnects, and contactor KM1 is failure to actuate, and reserve pump shuts down；With the increase of system water amount
（Reduce）, equipment runs so forth.
When reserve pump motor cross when, thermal overload relay normally-closed contact FR1 disconnect, relay KA1, relay KA2
With contactor KM1 dead electricity, reserve pump is inoperative.
Although as described above, having been represented with reference to specific preferred embodiment and having described the utility model, it must not
It is construed to the limitation to the utility model itself.The spirit and scope of the present utility model of appended claims definition are not being departed from
Under the premise of, can various changes can be made in the form and details to it.
Claims (5)
1. the failure emergency circuit of a kind of Frequency Conversion And Timing Water-Supplying Equipment, including main control circuit and emergency circuit, the main control
Circuit includes main road threephase switch, main road contactor and main road relay, and the main control circuit end connects work drive motor, institute
State and overlap emergency circuit between main road contactor and main road relay, it is characterised in that：The emergency circuit includes parallel with one another
Tie point, the second branch road and the 3rd branch road, the tie point includes PLC normally opened contacts, the PLC normally opened contacts it is defeated
Go out end series connection KA1 auxiliary relays；KA1 normally-closed contact of second branch road including series connection, the normally closed pressure switch S1 of the upper limit, lower limit are normal
Drive pressure switch S2 and KA2 auxiliary relay, the normally closed pressure switch S1 of the upper limit and normally opened pressure switch S2 of lower limit with electricity
Contact pressure table is electrically connected, and the normally opened pressure switch S2 of lower limit is in parallel with the normally opened contacts of KA2 first；3rd branch road includes
The normally opened contacts of KA2 second and contactor KM1, the contactor KM1 of series connection control the keying of standby motor.
2. the failure emergency circuit of Frequency Conversion And Timing Water-Supplying Equipment according to claim 1, it is characterised in that：The main control
Motor breaking device is connected between circuit and emergency circuit.
3. the failure emergency circuit of Frequency Conversion And Timing Water-Supplying Equipment according to claim 1, it is characterised in that：The KA2
The keying of one normally opened contact and the normally opened contacts of KA2 second is controlled by the KA2 auxiliary relays, realizes opening and closing synchronously.
4. the failure emergency circuit of Frequency Conversion And Timing Water-Supplying Equipment according to claim 1, it is characterised in that：The main control
Circuit uses triangle connected mode with work drive motor.
5. the failure emergency circuit of Frequency Conversion And Timing Water-Supplying Equipment according to claim 1, it is characterised in that：It is described to answer urgent telegram
Road outlet line is provided with thermal overload relay normally-closed contact FR1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621281257.XU CN206220174U (en) | 2016-11-28 | 2016-11-28 | A kind of failure emergency circuit of Frequency Conversion And Timing Water-Supplying Equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621281257.XU CN206220174U (en) | 2016-11-28 | 2016-11-28 | A kind of failure emergency circuit of Frequency Conversion And Timing Water-Supplying Equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206220174U true CN206220174U (en) | 2017-06-06 |
Family
ID=58786088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621281257.XU Expired - Fee Related CN206220174U (en) | 2016-11-28 | 2016-11-28 | A kind of failure emergency circuit of Frequency Conversion And Timing Water-Supplying Equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206220174U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110161955A (en) * | 2019-05-31 | 2019-08-23 | 广东电网有限责任公司 | A kind of transformer Cooling case PLC failure emergency processing method and normally opened relay |
-
2016
- 2016-11-28 CN CN201621281257.XU patent/CN206220174U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110161955A (en) * | 2019-05-31 | 2019-08-23 | 广东电网有限责任公司 | A kind of transformer Cooling case PLC failure emergency processing method and normally opened relay |
| CN110161955B (en) * | 2019-05-31 | 2024-02-02 | 广东电网有限责任公司 | A transformer cooling box PLC fault emergency treatment method and normally open relay |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170606 Termination date: 20191128 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |