CN214228150U - Frequency conversion and power frequency automatic switching device for induced draft fan of garbage power plant - Google Patents
Frequency conversion and power frequency automatic switching device for induced draft fan of garbage power plant Download PDFInfo
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- CN214228150U CN214228150U CN202120433547.6U CN202120433547U CN214228150U CN 214228150 U CN214228150 U CN 214228150U CN 202120433547 U CN202120433547 U CN 202120433547U CN 214228150 U CN214228150 U CN 214228150U
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Abstract
The utility model relates to a frequency conversion and power frequency automatic switching device of a draught fan of a garbage power plant, which comprises an automatic control device, and a frequency incoming switch module, a high-voltage frequency conversion outgoing switch module, a power frequency bypass switch module, a motor and a fan connected with the motor, wherein the frequency incoming switch module, the high-voltage frequency conversion outgoing switch module, the power frequency bypass; the power frequency power supply incoming line module outgoing line end is connected with the incoming line end of the high-voltage frequency conversion incoming line switch module, the high-voltage frequency conversion incoming line switch module outgoing line end is connected with the incoming line end of the high-voltage frequency conversion module, the high-voltage frequency conversion outgoing line switch module outgoing line end is connected with the high-voltage frequency conversion outgoing line switch module incoming line end, and the high-voltage frequency conversion outgoing line switch module is connected with the motor and the fan connected with the motor; and on the other hand, the power frequency bypass switch module is connected with a wire inlet end of the power frequency bypass switch module, and a wire outlet end of the power frequency bypass switch module is connected with the motor and the fan connected with the motor. The utility model discloses can realize the switching between the frequency conversion mode of operation and the power frequency mode of operation of draught fan.
Description
Technical Field
The utility model belongs to the technical field of rubbish power plant, concretely relates to rubbish power plant's draught fan frequency conversion and power frequency automatic switching control equipment.
Background
Along with the high-speed development of economy and society, the country has vigorously advocated clean, green environmental protection electricity generation, and rubbish environmental protection power plant is to traditional coal-electricity, compromises two main civilian problems of electricity generation and domestic waste processing, consequently, has proposed higher requirement to unit high reliability and continuous operation, and the draught fan is as rubbish power plant boiler side important auxiliary engine, and the effect is the flue gas that produces in the discharge furnace to make maintain certain negative pressure in the furnace, overcome the loss of pressure in the afterbody flue. At present, the power of an induced draft fan is mainly divided into two modes of motor driving and steam turbine driving. In order to reduce the plant power consumption, the garbage power plant generally adopts variable frequency operation to the induced draft fan driven by the motor so as to achieve the purposes of energy conservation and consumption reduction.
The defects and shortcomings of the prior art are as follows:
considering that the high-voltage frequency converter is a complex system composed of power electronic devices, various faults are inevitable to occur due to the environment, aging of the devices and the like. After the converter breaks down, easily cause the draught fan tripping operation on the one hand, not only influence the load, cause huge economic loss, threaten the safety and stability operation of unit even under the severe condition, on the other hand easily causes because the boiler is flame out the civilian problem that leads to rubbish can not in time be handled.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems in the prior art, the utility model provides a frequency conversion and power frequency automatic switching device for a draught fan of a garbage power plant, when the high-voltage frequency converter is seriously failed or overhauled, the draught fan can be switched from a frequency conversion operation mode to a power frequency operation mode; when the fault of the high-voltage frequency converter disappears, the induced draft fan can be switched to a frequency conversion operation mode from a power frequency operation mode. The problem of tripping of the induced draft fan is solved under the condition that a high-voltage frequency converter of the induced draft fan has serious accidents, and the civil problem that garbage can be timely treated is guaranteed while safe and stable operation of a unit is met.
The utility model discloses a following technical scheme realizes:
a frequency conversion and power frequency automatic switching device for a draught fan of a garbage power plant comprises an automatic control device, a power frequency power supply inlet wire module, a high-voltage frequency conversion inlet wire switch module, a high-voltage frequency conversion outlet wire switch module, a power frequency bypass switch module, a motor and a fan connected with the motor;
the power frequency power supply incoming line module outgoing line end is connected with the incoming line end of the high-voltage frequency conversion incoming line switch module, the high-voltage frequency conversion incoming line switch module outgoing line end is connected with the incoming line end of the high-voltage frequency conversion module, the high-voltage frequency conversion outgoing line switch module outgoing line end is connected with the high-voltage frequency conversion outgoing line switch module incoming line end, and the high-voltage frequency conversion outgoing line switch module is connected with the motor and the fan connected with the motor; on the other hand, the power frequency bypass switch module is connected with a wire inlet end of the power frequency bypass switch module, and a wire outlet end of the power frequency bypass switch module is connected with the motor and the fan connected with the motor;
the automatic control device is respectively connected with the power frequency incoming switch module, the high-voltage frequency conversion outgoing switch module, the power frequency bypass switch module, the motor and the fan connected with the motor and used for transmitting control signals and feedback signals.
The utility model discloses a further improvement lies in that power frequency power supply inlet wire module includes high-pressure side inlet wire circuit breaker QF0, electric capacity and electrified pilot lamp, connects high-pressure side inlet wire circuit breaker QF0 suitable for reading through rubbish power plant's factory with high-pressure generating line, and electric capacity suitable for reading is connected to high-pressure side inlet wire circuit breaker suitable for reading, and electrified pilot lamp one end is connected to electric capacity suitable for reading, and the earth is connected to the electrified pilot lamp other end.
The utility model discloses further improvement lies in, and high pressure frequency conversion inlet wire switch module includes high-pressure side inlet wire circuit breaker QF1 and high-pressure side isolator QS1, and high-pressure side inlet wire circuit breaker QF1 suitable for reading connects high-pressure side isolator QS 1's suitable for reading.
The utility model discloses a further improvement lies in, and the high pressure frequency conversion switch module of being qualified for the next round of competitions includes high-pressure side circuit breaker QF2 and high-pressure side isolator QS2, and high-pressure side circuit breaker QF2 end opening is connected high-pressure side isolator QS 2's suitable for reading.
The utility model discloses further improvement lies in, and power frequency bypass switch module includes power frequency bypass circuit breaker QF3, and power frequency bypass circuit breaker QF3 suitable for reading connects high-pressure side incoming line circuit breaker QF0 end socket, power frequency bypass circuit breaker QF3 end socket connection motor and the fan M who is connected with the motor.
The utility model discloses a further improvement lies in, automatic control device includes PLC control module, PLC control module respectively with power frequency incoming line switch module, high-pressure frequency conversion outgoing line switch module, power frequency bypass switch module, the motor and be connected with the fan that the motor is connected, a transmission for control signal and feedback signal, the fault signal output part of converter communicates with PLC control module's signal input part in the high-pressure frequency conversion module, PLC control module's control signal output part respectively with power frequency incoming line switch module in switch QF0, switch QF1 in the high-pressure frequency conversion incoming line switch module, switch QF2 and power frequency bypass switch module switch in the high-pressure frequency conversion outgoing line switch module link to each other in the QF3 signal receiving terminal.
The utility model discloses further improvement lies in that there is electric interlocking in high-voltage frequency conversion inlet wire switch module, high-voltage frequency conversion outlet wire switch module, power frequency bypass switch module, power frequency inlet wire switch module.
The utility model discloses further improvement lies in that the draught fan has frequency conversion mode of operation and power frequency mode of operation, and can switch between frequency conversion mode of operation and power frequency mode of operation.
The utility model discloses at least, following profitable technological effect has:
because the installed capacity of rubbish power plant is not big, often a stove a draught fan configuration, in order to guarantee that the boiler does not shut down the stove and put out fire, automatic switch-over to power frequency when realizing the converter and breaking down, thereby quick reliable safe switch-over the motor to power frequency operation situation, guarantee to switch over under the situation that equipment does not shut down, shorten the time that frequency conversion/power frequency switched over, the utility model provides a rubbish power plant draught fan frequency conversion and power frequency automatic switching device, solve draught fan high-voltage inverter on the one hand and take place under the serious accident condition, draught fan operation mode is switched over to power frequency mode operation problem by frequency conversion mode, when satisfying the unit safety and stability operation, on the other hand has solved rubbish and can in time obtain the civil problem of handling.
Drawings
Fig. 1 is a schematic diagram of a frequency conversion and power frequency automatic switching device of a garbage power plant induced draft fan.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
Referring to fig. 1, according to the device for automatically switching between frequency conversion and power frequency of the induced draft fan of the refuse power plant, when the high-voltage inverter fails seriously or is overhauled, the induced draft fan can be switched from a frequency conversion operation mode to a power frequency operation mode; when the high-voltage inverter trouble disappeared, the draught fan can be switched to the frequency conversion mode of operation by power frequency mode of operation, include: the system comprises an automatic control device, a power frequency power supply incoming line module, a high-voltage frequency conversion incoming line switch module, a high-voltage frequency conversion outgoing line switch module, a power frequency bypass switch module, a motor and a fan connected with the motor. The power frequency power supply incoming line module outgoing line end is connected with the incoming line end of the high-voltage frequency conversion incoming line switch module, the high-voltage frequency conversion incoming line switch module outgoing line end is connected with the incoming line end of the high-voltage frequency conversion module, the high-voltage frequency conversion outgoing line switch module outgoing line end is connected with the high-voltage frequency conversion outgoing line switch module incoming line end, and the high-voltage frequency conversion outgoing line switch module is connected with the motor and the fan connected with the motor; and on the other hand, the power frequency bypass switch module is connected with a wire inlet end of the power frequency bypass switch module, and a wire outlet end of the power frequency bypass switch module is connected with the motor and the fan connected with the motor. Wherein, the high-voltage frequency conversion incoming switch module, the high-voltage frequency conversion outgoing switch module, the power frequency bypass switch module and the power frequency incoming switch module are electrically interlocked.
The power frequency power supply incoming line module comprises a high-voltage side incoming line breaker QF0, a capacitor and an electrified indicating lamp, an upper opening of the high-voltage side incoming line breaker QF0 is connected through a high-voltage bus of a garbage power plant, a lower opening of the high-voltage side incoming line breaker is connected with an upper opening of the capacitor, one end of the electrified indicating lamp is connected with the lower opening of the capacitor, and the other end of the electrified indicating lamp is connected with the ground.
The high-voltage frequency conversion incoming line switch module comprises a high-voltage side incoming line breaker QF1 and a high-voltage side disconnecting switch QS1, and the lower port of the high-voltage side incoming line breaker QF1 is connected with the upper port of the high-voltage side disconnecting switch QS 1.
The high-voltage frequency conversion outgoing line switch module comprises a high-voltage side outgoing line breaker QF2 and a high-voltage side disconnecting switch QS2, and the lower port of the high-voltage side outgoing line breaker QF2 is connected with the upper port of the high-voltage side disconnecting switch QS 2.
The power frequency bypass switch module comprises a power frequency bypass breaker QF3, the upper port of the power frequency bypass breaker QF3 is connected with the lower port of a high-voltage side wiring breaker QF0, and the lower port of the power frequency bypass breaker QF3 is connected with a motor and a fan M connected with the motor.
The automatic control device comprises a PLC control module, the PLC control module is respectively connected with a power frequency incoming line switch module, a high-voltage frequency conversion outgoing line switch module, a power frequency bypass switch module, a motor and a fan connected with the motor, the automatic control device is used for transmitting control signals and feedback signals, the fault signal output end of a frequency converter in the high-voltage frequency conversion module is communicated with the signal input end of the PLC control module, the control signal output end of the PLC control module is respectively connected with a switch QF0 in the power frequency incoming line switch module, a switch QF1 in the high-voltage frequency conversion incoming line switch module, a switch QF2 in the high-voltage frequency conversion outgoing line switch module, and the signal receiving ends of the power frequency bypass switch module QF3 and a draught fan baffle are connected.
The frequency conversion operation mode refers to a switch-on state of an isolating switch QS1 in the high-voltage frequency conversion incoming line switch module, a switch-on state of an isolating switch QS2 in the high-voltage frequency conversion outgoing line switch module, a switch-on state of a circuit breaker QF1 in the high-voltage frequency conversion incoming line switch module, a switch-on state of a circuit breaker QF2 in the high-voltage frequency conversion outgoing line switch module, a switch-off state of a circuit breaker QF3 in the power frequency bypass switch module, a switch-on state of a circuit breaker QF0 in the power frequency incoming line switch module, and normal operation of a frequency converter in the high-voltage frequency conversion module.
The power frequency operation mode refers to a high-voltage frequency conversion incoming line switch module with an isolating switch QS1 in an open state or a high-voltage frequency conversion incoming line switch module with a breaker QF1 in an open state, a high-voltage frequency conversion outgoing line switch module with an isolating switch QS2 in an open state or a high-voltage frequency conversion outgoing line switch module with a breaker QF2 in an open state, a power frequency bypass switch module with a breaker QF3 in a closed state, a power frequency incoming line switch module with a breaker QF0 in a closed state, and a high-voltage frequency converter in the high-voltage frequency conversion module quits from operation.
The existence of electrical interlocking of the high-voltage variable-frequency incoming line switch module, the high-voltage variable-frequency outgoing line switch module, the high-voltage variable-frequency module, the power frequency bypass switch module and the power frequency incoming line switch module means that 1) an isolating switch QS1 is firstly switched on in the high-voltage variable-frequency incoming line switch module, and then a circuit breaker QF1 is switched on; in the high-voltage variable-frequency outgoing line switch module, an isolating switch QS2 is switched on first, and then a circuit breaker QF2 is switched on; 2) the isolating switch QS1 and the breaker QF1 in the high-voltage frequency conversion incoming line switch module are switched on, the isolating switch QS2 and the breaker QF2 in the high-voltage frequency conversion outgoing line switch module are switched on, and the breaker QF3 in the power frequency bypass switch module is forbidden to be switched on; a disconnecting switch QS1 or a breaker QF1 in the high-voltage variable-frequency incoming line switch module is switched on, a disconnecting switch QS2 or a breaker QF2 in the high-voltage variable-frequency outgoing line switch module is switched on, and a breaker QF3 in the power frequency bypass switch module is allowed to be switched on; 3) the frequency converter in the high-voltage frequency conversion module and the breaker QF0 in the working incoming line switch module realize interlocking protection, and when the frequency converter does not have a power transmission condition, a breaker QF0 closing loop in the working incoming line switch module is locked.
Claims (8)
1. A frequency conversion and power frequency automatic switching device for a draught fan of a garbage power plant is characterized by comprising an automatic control device, a power frequency power supply incoming line module, a high-voltage frequency conversion incoming line switch module, a high-voltage frequency conversion outgoing line switch module, a power frequency bypass switch module, a motor and a fan connected with the motor;
the power frequency power supply incoming line module outgoing line end is connected with the incoming line end of the high-voltage frequency conversion incoming line switch module, the high-voltage frequency conversion incoming line switch module outgoing line end is connected with the incoming line end of the high-voltage frequency conversion module, the high-voltage frequency conversion outgoing line switch module outgoing line end is connected with the high-voltage frequency conversion outgoing line switch module incoming line end, and the high-voltage frequency conversion outgoing line switch module is connected with the motor and the fan connected with the motor; on the other hand, the power frequency bypass switch module is connected with a wire inlet end of the power frequency bypass switch module, and a wire outlet end of the power frequency bypass switch module is connected with the motor and the fan connected with the motor;
the automatic control device is respectively connected with the power frequency incoming switch module, the high-voltage frequency conversion outgoing switch module, the power frequency bypass switch module, the motor and the fan connected with the motor and used for transmitting control signals and feedback signals.
2. The device of claim 1, wherein the power frequency power supply incoming line module comprises a high-voltage side incoming line breaker QF0, a capacitor and a live indicator light, the upper opening of the high-voltage side incoming line breaker QF0 is connected through a high-voltage bus for a garbage power plant, the lower opening of the high-voltage side incoming line breaker is connected with the upper opening of the capacitor, the lower opening of the capacitor is connected with one end of the live indicator light, and the other end of the live indicator light is connected with the ground.
3. The automatic frequency conversion and power frequency switching device for the induced draft fan of the refuse power plant as claimed in claim 2, wherein the high-voltage frequency conversion incoming line switch module comprises a high-voltage side incoming line breaker QF1 and a high-voltage side disconnecting switch QS1, and the lower port of the high-voltage side incoming line breaker QF1 is connected with the upper port of the high-voltage side disconnecting switch QS 1.
4. The automatic frequency conversion and power frequency switching device for the induced draft fan of the refuse power plant as claimed in claim 3, wherein the high-voltage frequency conversion outgoing line switch module comprises a high-voltage side outgoing line breaker QF2 and a high-voltage side disconnecting switch QS2, and the lower port of the high-voltage side incoming line breaker QF2 is connected with the upper port of the high-voltage side disconnecting switch QS 2.
5. The device for automatically switching the frequency conversion and the power frequency of the induced draft fan of the garbage power plant according to claim 4, wherein the power frequency bypass switch module comprises a power frequency bypass breaker QF3, the upper port of the power frequency bypass breaker QF3 is connected with the lower port of a high-voltage side incoming line breaker QF0, and the lower port of the power frequency bypass breaker QF3 is connected with a motor and a fan M connected with the motor.
6. The device of claim 5, wherein the automatic control device comprises a PLC control module, the PLC control module is respectively connected with the power frequency incoming switch module, the high-voltage frequency conversion outgoing switch module, the power frequency bypass switch module, the motor and a fan connected with the motor for transmission of control signals and feedback signals, a fault signal output end of a frequency converter in the high-voltage frequency conversion module is communicated with a signal input end of the PLC control module, and a control signal output end of the PLC control module is respectively connected with a signal receiving end of a switch QF0 in the power frequency incoming switch module, a switch QF1 in the high-voltage frequency conversion incoming switch module, a switch QF2 in the high-voltage frequency conversion outgoing switch module and a signal receiving end of a QF3 in the power frequency bypass switch module.
7. The device for automatically switching the frequency conversion and the power frequency of the induced draft fan of the garbage power plant according to claim 1, wherein the high-voltage frequency conversion incoming line switch module, the high-voltage frequency conversion outgoing line switch module, the power frequency bypass switch module and the power frequency incoming line switch module are electrically interlocked.
8. The automatic frequency conversion and power frequency switching device of the induced draft fan of the refuse power plant as claimed in claim 1, wherein the induced draft fan has a frequency conversion operation mode and a power frequency operation mode, and can be switched between the frequency conversion operation mode and the power frequency operation mode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120433547.6U CN214228150U (en) | 2021-02-26 | 2021-02-26 | Frequency conversion and power frequency automatic switching device for induced draft fan of garbage power plant |
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| CN202120433547.6U CN214228150U (en) | 2021-02-26 | 2021-02-26 | Frequency conversion and power frequency automatic switching device for induced draft fan of garbage power plant |
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| CN214228150U true CN214228150U (en) | 2021-09-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114439767A (en) * | 2021-12-28 | 2022-05-06 | 武汉佳德沃博格风动技术有限公司 | Variable frequency adjusting method of fan |
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2021
- 2021-02-26 CN CN202120433547.6U patent/CN214228150U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114439767A (en) * | 2021-12-28 | 2022-05-06 | 武汉佳德沃博格风动技术有限公司 | Variable frequency adjusting method of fan |
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