CN202004704U - Soft start positive/negative rotation switching device of tunnel large-scale axial fan - Google Patents
Soft start positive/negative rotation switching device of tunnel large-scale axial fan Download PDFInfo
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- CN202004704U CN202004704U CN2010206870157U CN201020687015U CN202004704U CN 202004704 U CN202004704 U CN 202004704U CN 2010206870157 U CN2010206870157 U CN 2010206870157U CN 201020687015 U CN201020687015 U CN 201020687015U CN 202004704 U CN202004704 U CN 202004704U
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- contactor
- soft start
- main circuit
- switching device
- rotating
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Abstract
The utility model mainly discloses a soft start positive/negative rotation switching device of a tunnel large-scale axial fan. The device includes a power source, a soft start main circuit, a power frequency bypass contactor, a dynamic braking circuit, and a PLC. The power source is connected with the soft start main circuit to drive a motor of the fan to work; the dynamic braking circuit is connected in parallel with the soft start main circuit; the soft start main circuit includes a positive rotation contactor, a negative rotation contactor, and a soft starter; the positive rotation contactor and the negative rotation contactor are connected in parallel, and then the positive rotation contactor and the negative rotation contactor are connected in series with the soft starter; the power frequency bypass contactor is connected in parallel on the two ends of the soft starter; the PLC is connected with the soft start main circuit, the power frequency bypass contactor, and the dynamic braking circuit to realize the switching among circuits. The utility model can realize a safe fan positive/negative rotation within 60 seconds, prevent the easily caused faults, and prolong the service lifetime of the fan.
Description
Technical field
The utility model relates to blower fan Control Engineering technical field, and is special relevant with a kind of tunnel large axial flow fan soft start rotating switching device shifter.
Background technology
The subway tunnel large axial flow fan divides the tunnel large axial flow fan of station large axial flow fan and interval Ventilator Room usually.Give for satisfying subway tunnel, the requirement of air draft and fire-fighting smoke evacuation, generally all adopt the rotating reversible fan, and when fire and blocked state, finish from just changeing at full speed in must 60 seconds and switching to the smoke evacuation at full speed of counter-rotating at full speed, the casualties of farthest avoiding fire to cause.
The station large axial flow fan has all adopted variable frequency control usually, because frequency converter band rotating speed itself is followed the tracks of brake module automatically, therefore can follow the tracks of 60 seconds inner blowers of the more convenient realization of brake module automatically by rotating speed and finish from just changeing at full speed to switch at full speed and reverse.And the tunnel large axial flow fan adopts is soft initiator, and no rotating speed is followed the tracks of brake module automatically, must brake by outside.And the plug braking of adopting at present is too big to the mechanical electric impact of blower fan.Cause the fault and the useful life that influences blower fan of blower fan easily.
The utility model content
In order to address the above problem, the utility model provides a kind of tunnel large axial flow fan soft start rotating switching device shifter, can realize the rotating of blower fan safety in 60 seconds.
To achieve these goals, the technical scheme that the utility model adopted is:
A kind of tunnel large axial flow fan soft start rotating switching device shifter comprises power supply, soft start main circuit, power frequency bypass contactor, energy-dissipating brake circuit, PLC(programmable logic controller (PLC)); Power supply connects the motor work that the soft start main circuit drives blower fan; Energy-dissipating brake circuit is connected in parallel on the soft start main circuit; The right main circuit that starts comprises positive contactor, counter-rotating contactor and soft initiator; Connect with soft initiator in positive contactor, counter-rotating contactor back parallel with one another; The power frequency bypass contactor is connected in parallel on the two ends of soft initiator; PLC connects soft start main circuit, power frequency bypass contactor and energy-dissipating brake circuit, realizes the switching between each circuit.
Described power supply is the automatic switchover duplicate supply of external main power source and stand-by power supply.
Described power supply is connected with the soft start main circuit by main circuit breaker again.
Described energy-dissipating brake circuit is once to be connected and constituted by braking circuit breaker, braking contactor, low-tension transformer, rectifier.
Described PLC comprise the parking input, just change input, counter-rotating input, parking output, just change output, inversion output terminal, braking output; Just changeing output and connecting positive contactor, inversion output terminal connects the counter-rotating contactor, and the braking output connects braking contactor, stops output and connects positive contactor, counter-rotating contactor and power frequency bypass contactor.
Described PLC has the fire signal input, external urgent fire signal.
Described PLC has the warning input, external external alarm signal.
After adopting such scheme, after the PLC in the utility model received blower fan fire signal and operating mode instruction, blower fan started intelligent energy consumption braking system work automatically from just changeing when dropping to according to predefined programmed value the most at a high speed, and blower fan is steadily stopped.Automatically accelerate to then oppositely the most at a high speed.Can be safe and reliable satisfy in 60 seconds switches at full speed oppositely from the full speed forward automatically.
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 is the circuit structure block diagram of the utility model preferred embodiment.
Embodiment
As shown in Figure 1, mainly comprise main circuit breaker 4, positive contactor (KM1) 8, counter-rotating contactor (KM2) 5, soft initiator 9, PLC 14, braking circuit breaker 13, braking contactor 12, low-tension transformer 11, rectifier 10 in the utility model preferred embodiment.On PLC 14, also be provided with parking input 19, just change input 20, counter-rotating input 21, fire input 22, warning input 23, just change output 16, parking output 15, inversion output terminal 17, braking output 18.Wherein, parking input 19, just change input 20, the counter-rotating input 21 are load button forms.
Positive contactor (KM1) 8 and 5 parallel connections of counter-rotating contactor (KM2), connecting with soft initiator 9 in back in parallel, forms the soft start main circuit.Braking circuit breaker 13, braking contactor 12, low-tension transformer 11, rectifier 10 are connected successively and are formed energy-dissipating brake circuit.Energy-dissipating brake circuit is connected in parallel on the two ends of soft starting circuit.Wherein, at the two ends of soft initiator 9 power frequency bypass contactor 6 in parallel.
Main power source 1 and stand-by power supply 2 are supplied with duplicate supply (WTS) 3.When wherein one road electricity cut off the power supply, duplicate supply (WTS) 3 automatically switched to other one road power supply, and the assurance system does not cut off the power supply.Duplicate supply (WTS) 3 outputs are arrived positive contactor (KM1) 8 or counter-rotating contactor (KM2) 5 through circuit breaker (QF) 4.
1, just changes
When just changeing input 20 and obtain the load button signal, just commentaries on classics output 16 control positive contactors (KM1) 8 adhesives of PLC 14, power supply is just changeing to motor (M) 7 by soft initiator (RQ) 9.Fan electromotor starts back power frequency bypass contactor (KM4) 6 adhesives that finish, and soft initiator (RQ) 9 gives motor (M) 7 power supplies.Motor (M) 7 just changes at full speed.
2, stop
When parking input 19 obtained the stop button signal, the output 15 that stops of PLC 14 was controlled positive contactors (KM1) 8, bypass contactor (KM4) 6 releases, and motor (M) 7 outages stop.
3, counter-rotating
When counter-rotating input 21 obtains the invert button signal, inversion output terminal 17 control inversion contactors (KM2) 5 adhesives of PLC 14, power supply gives motor (M) 7 counter-rotatings by soft initiator (RQ) 9.Fan electromotor starts back power frequency bypass contactor (KM4) 6 adhesives that finish, 7 power supplies of soft initiator (RQ) 9 fan motor (M).Motor (M) 7 counter-rotating at full speed.
4, just changeing the switching counter-rotating
When fan electromotor (M) 7 gives the counter-rotating input 21 1 reverse signals when just changeing full speed running, PLC 14 stop the output 18 positive contactors of control (KM1) 8, power frequency bypass contactor (KM4) 6 discharges immediately, fan electromotor (M) 7 outage back decelerations.When fan electromotor (M) 7 rotating speeds drop to predefined programmed value, braking output 18 output signals of PLC 14, that controls intelligent energy consumption braking system adds electric contactor (KMZD) 12 adhesives, power supply is through low-tension transformer (B) 11, rectifier (DZ) 10, to be added in through the direct current after the rectification between two windings of fan electromotor (M) 7, carry out dynamic braking.When the rotating speed of fan electromotor (M) 7 dropped to zero, the braking contactor (KMZD) 12 of the intelligent energy consumption braking system of braking output 18 output controls of PLC 14 discharged outage, stops the dynamic braking to fan electromotor (M) 7.Simultaneously, inversion output terminal 17 output control inversion contactors (KM2) 5 adhesives of PLC 14, power supply gives motor (M) 7 counter-rotatings by soft initiator (RQ) 9.Fan electromotor starts back power frequency bypass contactor (KM4) 6 adhesives that finish, 7 power supplies of soft initiator (RQ) 9 fan motor (M).Motor (M) 7 counter-rotating at full speed.Reach the automatic switchover in 60 seconds.
5, counter-rotating is switched just changes
If need motor (M) 7 when counter-rotating full speed running at present, blower fan just changes from being transformed at full speed at full speed.Then just changeing input 20 and obtaining the load button signal, PLC14 stop output 18 control inversion contactors (KM21) 5, power frequency bypass contactor (KM4) 6 discharges immediately, slow down in fan electromotor (M) 7 outage back.When fan electromotor (M) 7 rotating speeds drop to predefined programmed value, braking output 18 output signals of PLC 14, control braking contactor (KMZD) 12 adhesives of intelligent energy consumption braking system, power supply is through low-tension transformer (B) 11, rectifier (DZ) 10, to be added in through the direct current after the rectification between two windings of fan electromotor (M) 7, carry out dynamic braking.When the rotating speed of fan electromotor (M) 7 dropped to zero, the braking contactor (KMZD) 12 of the intelligent energy consumption braking system of braking output 18 output controls of PLC 14 discharged outage, stops the dynamic braking to fan electromotor (M) 7.Simultaneously, just commentaries on classics output 16 output control positive contactors (KM1) 8 adhesives of PLC 14, power supply is just changeing for motor (M) 7 by soft initiator (RQ) 9.Fan electromotor starts back power frequency bypass contactor (KM4) 6 adhesives that finish, 7 power supplies of soft initiator (RQ) 9 fan motor (M).Motor (M) 7 just changes at full speed.Reach the automatic switchover in 60 seconds.
The utility model is fit to other similar design and use that need the transducer control circuit of phase sequence equally.The foregoing description only is used to the inventive concept of the present utility model of explaining, but not to the qualification of the utility model rights protection, allly utilizes this design that the utility model is carried out the change of unsubstantiality, all should fall into protection range of the present utility model.
Claims (7)
1. a tunnel large axial flow fan soft start rotating switching device shifter is characterized in that: comprise power supply, soft start main circuit, power frequency bypass contactor, energy-dissipating brake circuit, PLC; Power supply connects the motor work that the soft start main circuit drives blower fan; Energy-dissipating brake circuit is connected in parallel on the soft start main circuit; The right main circuit that starts comprises positive contactor, counter-rotating contactor and soft initiator; Connect with soft initiator in positive contactor, counter-rotating contactor back parallel with one another; The power frequency bypass contactor is connected in parallel on the two ends of soft initiator; PLC connects soft start main circuit, power frequency bypass contactor and energy-dissipating brake circuit, realizes the switching between each circuit.
2. a kind of tunnel large axial flow fan soft start rotating switching device shifter as claimed in claim 1, it is characterized in that: described power supply is the automatic switchover duplicate supply of external main power source and stand-by power supply.
3. a kind of tunnel large axial flow fan soft start rotating switching device shifter as claimed in claim 1 is characterized in that: described power supply is connected with the soft start main circuit by main circuit breaker again.
4. a kind of tunnel large axial flow fan soft start rotating switching device shifter as claimed in claim 1 is characterized in that: described energy-dissipating brake circuit is once to be connected and constituted by braking circuit breaker, braking contactor, low-tension transformer, rectifier.
5. a kind of tunnel large axial flow fan soft start rotating switching device shifter as claimed in claim 1 is characterized in that: described PLC comprise the parking input, just change input, counter-rotating input, parking output, just change output, inversion output terminal, braking output; Just changeing output and connecting positive contactor, inversion output terminal connects the counter-rotating contactor, and the braking output connects braking contactor, stops output and connects positive contactor, counter-rotating contactor and power frequency bypass contactor.
6. a kind of tunnel large axial flow fan soft start rotating switching device shifter as claimed in claim 5, it is characterized in that: described PLC has the fire signal input, external urgent fire signal.
7. a kind of tunnel large axial flow fan soft start rotating switching device shifter as claimed in claim 5, it is characterized in that: described PLC has the warning input, external external alarm signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206870157U CN202004704U (en) | 2010-12-29 | 2010-12-29 | Soft start positive/negative rotation switching device of tunnel large-scale axial fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206870157U CN202004704U (en) | 2010-12-29 | 2010-12-29 | Soft start positive/negative rotation switching device of tunnel large-scale axial fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202004704U true CN202004704U (en) | 2011-10-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206870157U Expired - Fee Related CN202004704U (en) | 2010-12-29 | 2010-12-29 | Soft start positive/negative rotation switching device of tunnel large-scale axial fan |
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| CN (1) | CN202004704U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102946218A (en) * | 2012-10-26 | 2013-02-27 | 中联重科股份有限公司 | Control system and method for preventing reverse rotation and engineering machinery with system |
| CN103618481A (en) * | 2013-12-09 | 2014-03-05 | 湖南南方宇航高精传动有限公司 | Motor steering controller and control method |
| CN108691561A (en) * | 2018-05-14 | 2018-10-23 | 兖州煤业股份有限公司 | Axial flow blower trining mock up |
| CN109322691A (en) * | 2018-10-22 | 2019-02-12 | 中铁第四勘察设计院集团有限公司 | The energy consuming brake of tunnel blower |
-
2010
- 2010-12-29 CN CN2010206870157U patent/CN202004704U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102946218A (en) * | 2012-10-26 | 2013-02-27 | 中联重科股份有限公司 | Control system and method for preventing reverse rotation and engineering machinery with system |
| CN103618481A (en) * | 2013-12-09 | 2014-03-05 | 湖南南方宇航高精传动有限公司 | Motor steering controller and control method |
| CN108691561A (en) * | 2018-05-14 | 2018-10-23 | 兖州煤业股份有限公司 | Axial flow blower trining mock up |
| CN108691561B (en) * | 2018-05-14 | 2020-02-14 | 兖州煤业股份有限公司 | Axial fan training model |
| CN109322691A (en) * | 2018-10-22 | 2019-02-12 | 中铁第四勘察设计院集团有限公司 | The energy consuming brake of tunnel blower |
| CN109322691B (en) * | 2018-10-22 | 2024-03-15 | 中铁第四勘察设计院集团有限公司 | Energy consumption braking device of tunnel fan |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: ZHEJIANG JINDUN FAN CO., LTD. Free format text: FORMER OWNER: ZHEJIANG JINDUN BLOWER COOLING EQUIPMENT CO., LTD. Effective date: 20111205 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20111205 Address after: 312363 Zhang Zhen Industrial Zone, Zhejiang, Shangyu Patentee after: Zhejiang Jindun Fans Holding Co., Ltd. Address before: 312363, Shaoxing City, Zhejiang province Shangyu Zhang Town Industrial Park Patentee before: Zhejiang Jindun Blower Cooling Equipment Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111005 Termination date: 20181229 |