CN205265586U - Circuit structure of power frequency automatic switch -over is arrived in frequency conversion of boiler fan - Google Patents
Circuit structure of power frequency automatic switch -over is arrived in frequency conversion of boiler fan Download PDFInfo
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- CN205265586U CN205265586U CN201620022457.7U CN201620022457U CN205265586U CN 205265586 U CN205265586 U CN 205265586U CN 201620022457 U CN201620022457 U CN 201620022457U CN 205265586 U CN205265586 U CN 205265586U
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- boiler fan
- boiler
- frequency
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Abstract
The utility model relates to an electrical technology field specifically is a circuit structure of power frequency automatic switch -over is arrived in frequency conversion of boiler fan, and the power frequency operation can be arrived by the automatic switch -over in the boiler fan frequency conversion trouble jump vehicle -hour to brief, the easy control of this circuit structure flow, guarantees boiler fan continuous operation. The utility model discloses a circuit structure of power frequency automatic switch -over is arrived in frequency conversion of boiler fan, user's switch, converter and boiler fan that connects including the electricity, its characterized in that: still connect the automatic power frequency bypass at the converter both ends including the electricity, this automation power frequency bypass and with the converter all with the control system of boiler connects.
Description
Technical field
The utility model relates to technical field of electricity, and specifically a kind of boiler fan is converted to the circuit knot that power frequency automatically switchesStructure.
Background technology
High voltage converter is not only energy-conservation but also can reduce the wearing and tearing of equipment, simultaneously easy to adjust, has been widely used boilerIn the middle of fan operation, but existing also imperfection of domestic high voltage AC converter technology, fault rate is higher, has badly influenced boilerThe reliable and stable row of operation continuously.
Utility model content
The purpose of this utility model is the deficiency overcoming in background technology, provides a kind of boiler fan automatic from being converted to power frequencyThe circuit structure switching, this circuit structure flow process briefly, easily control, boiler fan frequency conversion fault jump can when car fromThe moving power frequency operation that is switched to, ensures that boiler fan moves continuously.
The technical solution adopted in the utility model is as follows: a kind of boiler fan is converted to the circuit structure that power frequency automatically switches,The subscriber switch, frequency converter and the boiler fan that comprise electrical connection, is characterized in that: also comprise and be connected electrically in frequency converter twoThe Auto power frequency bypass of end, this Auto power frequency bypass and being all connected with the control system of described boiler with frequency converter.
Described Auto power frequency bypass is by No. one that is connected with described control system, No. two isolating switches, No. one, No. two vacuumBreaker and vacuum contactor composition; Wherein subscriber switch, a vacuum circuit breaker, an isolating switch are electrically connected successivelyBe connected on the front end of frequency converter, No. two isolating switches, vacuum contactor and boiler fans be connected electrically in successively frequency converter afterEnd, No. two vacuum circuit breakers are connected electrically in the rear end of front end and the vacuum contactor of a vacuum circuit breaker.
The beneficial effect the utlity model has is: the utility model adopts Auto power frequency bypass, transports in boiler fan frequency conversionAfter row, produce fault and automatically switch to power frequency operation, prior art contrast, the utility model is simple in structure, flow process is brief,Easily control, in the time that boiler fan frequency conversion fault is jumped car, can automatically switch to power frequency operation, thereby ensure that boiler fan connectsReforwarding row.
Brief description of the drawings
Fig. 1 is electrical block diagram of the present utility model.
Detailed description of the invention
Below in conjunction with Figure of description, the utility model is described in further detail, but that the utility model is not limited to is followingEmbodiment.
As shown in Figure 1, a kind of boiler fan is converted to the circuit structure that power frequency automatically switches, and comprises that the user of electrical connection opensClose QF, frequency converter 1 and boiler fan 2. Also comprise the Auto power frequency bypass that is connected electrically in frequency converter two ends, this is automaticPower frequency bypass and being all connected with the control system of described boiler with frequency converter, can in the time that boiler fan frequency conversion fault is jumped carAutomatically switch to power frequency operation.
Described Auto power frequency bypass is by No. one that is connected with described control system, No. two isolating switch QS1, QS2, No. one,No. two vacuum circuit breaker QF1, QF2 and vacuum contactor KM1 composition; Wherein subscriber switch, vacuum circuit breaker,An isolating switch is connected electrically in the front end of frequency converter successively, and No. two isolating switch, vacuum contactor and boiler fan are complied withThe inferior rear end that is connected electrically in frequency converter, No. two vacuum circuit breakers are connected electrically in front end and the vacuum contact of a vacuum circuit breakerThe rear end of device.
In described Auto power frequency bypass, when isolating switch QS1, QS2 and vacuum circuit breaker QF1, QF2 disconnect, vacuumCircuit breaker Q F1, vacuum contactor KM1 do not close; Vacuum circuit breaker QF2 and vacuum contactor KM1 interlocking, vacuumCircuit breaker Q F2 and vacuum circuit breaker QF1 do not interlock.
Operation principle of the present utility model is: frequency conversion is switched in power frequency process, first disconnected vacuum circuit breaker QF1, more disconnected vacuumContactor KM1; Then close vacuum circuit breaker QF2, motor power frequency operation;
Failover only limits to switch power frequency when frequency converter failure is shut down, when frequency converter failure trip signal is sent to DCS systemIn system time, DCS system starts power frequency automatically, and in power frequency startup process, DCS system is closed baffle door automatically, is closing baffle doorIn process, maintain combustion chamber draft within the limits prescribed.
The foregoing is only preferred embodiment of the present utility model, for a person skilled in the art, the utility modelCan there be various modifications and variations. All within spirit of the present utility model and principle, any amendment of doing, be equal to and replaceChange, improvement etc., within all should being included in protection domain of the present utility model.
Claims (2)
- Boiler fan be converted to power frequency automatically switch a circuit structure, comprise electrical connection subscriber switch (QF),Frequency converter (1) and boiler fan (2), is characterized in that: also comprise the automatic power frequency that is connected electrically in frequency converter two endsBypass, this Auto power frequency bypass and being all connected with the control system of described boiler with frequency converter.
- 2. a kind of boiler fan according to claim 1 is converted to the circuit structure that power frequency automatically switches, its featureBe: described Auto power frequency bypass is by No. one that is connected with described control system, No. two isolating switches (QS1, QS2),No. one, No. two vacuum circuit breakers (QF1, QF2) and vacuum contactor (KM1) composition;Wherein subscriber switch (QF), a vacuum circuit breaker (QF1), an isolating switch (QS1) are electrically connected successivelyBe connected on the front end of frequency converter, No. two isolating switches (QS2), vacuum contactor (KM1) and boiler fan be electricity successivelyBe connected to the rear end of frequency converter, No. two vacuum circuit breakers (QF2) be connected electrically in a vacuum circuit breaker (QF1) beforeThe rear end of end and vacuum contactor (KM1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620022457.7U CN205265586U (en) | 2016-01-11 | 2016-01-11 | Circuit structure of power frequency automatic switch -over is arrived in frequency conversion of boiler fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620022457.7U CN205265586U (en) | 2016-01-11 | 2016-01-11 | Circuit structure of power frequency automatic switch -over is arrived in frequency conversion of boiler fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205265586U true CN205265586U (en) | 2016-05-25 |
Family
ID=56007089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620022457.7U Active CN205265586U (en) | 2016-01-11 | 2016-01-11 | Circuit structure of power frequency automatic switch -over is arrived in frequency conversion of boiler fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205265586U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105490616A (en) * | 2016-01-11 | 2016-04-13 | 宁波中金石化有限公司 | Circuit structure for boiler blower capable of automatically switching to power frequency from variable frequency |
-
2016
- 2016-01-11 CN CN201620022457.7U patent/CN205265586U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105490616A (en) * | 2016-01-11 | 2016-04-13 | 宁波中金石化有限公司 | Circuit structure for boiler blower capable of automatically switching to power frequency from variable frequency |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |