CN201747650U - Air blower frequency-conversion control device used in wheat flour production workshop - Google Patents
Air blower frequency-conversion control device used in wheat flour production workshop Download PDFInfo
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- CN201747650U CN201747650U CN2010202963468U CN201020296346U CN201747650U CN 201747650 U CN201747650 U CN 201747650U CN 2010202963468 U CN2010202963468 U CN 2010202963468U CN 201020296346 U CN201020296346 U CN 201020296346U CN 201747650 U CN201747650 U CN 201747650U
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- air blower
- wheat flour
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Abstract
The utility model relates to an air blower frequency-conversion control device used in a wheat flour production workshop, which can adjust air quantity according to the current temperature and dust concentration and is suitable for saving electric energy and prolonging the service life of the air blower. The device comprises a frequency converter for controlling the rotational speed of the air blower, a PLC (Programmable Logic Controller) connected with a control input terminal of the frequency converter and a temperature transmitter and a dust concentration transmitter which are respectively connected with the PLC and used for controlling the air quantity of the air blower according to the measured temperature and dust concentration; the rotational speed of the air blower can be properly increased under the condition of higher temperature or higher dust concentration, so as to ensure the production safety in the workshop; and the PLC is also connected with an air quantity transmitter for feeding back the rotational speed of the air blower for purpose of controlling the air quantity.
Description
Technical field
The utility model relates to a kind of wheat flour manufacturing shop fan frequency conversion control gear.
Background technique
The wheat flour manufacturing shop adopts blower fan to discharge explosive dust granules in the workshop, and is beneficial to cooling, and the production safety in workshop is played an important role.
In the prior art, the blower fan that the wheat flour manufacturing shop adopts directly connects ac power supply and is in the full speed operation state all the time, can not regulate air quantity according to on-site actual situations, and power consumption is big and blower fan is shorter working life.
The model utility content
The technical problems to be solved in the utility model provides a kind ofly can be regulated air quantity, be suitable for saving power and prolong the wheat flour manufacturing shop fan frequency conversion control gear of fan life according to situations such as present temperature, dust concentrations.
In order to solve the problems of the technologies described above, the utility model provides a kind of wheat flour manufacturing shop fan frequency conversion control gear, comprising: the temperature transmitter and the dust concentration transmitter that are used for controlling according to measured temperature and dust concentration fan delivery that be used to control the frequency variator of rotation speed of fan, the PLC that links to each other with the control input end of frequency variator, link to each other with PLC.Promptly under temperature or dust concentration condition with higher, can suitably improve rotation speed of fan, to guarantee the production safety in the workshop.
For ease of the control air quantity, described PLC also is connected with the air quantity transmitter that is used to feed back rotation speed of fan.
Further, be provided with first relay between the power output end of described frequency variator and the power input of blower fan, be provided with second relay between the power input of frequency variator and the power input of blower fan, the power input of frequency variator is provided with the power supply relay that is used to connect external ac power source.
Technique scheme of the present utility model has the following advantages compared to existing technology: adopt the blower fan of frequency control of motor speed, starting steadily can realize stepless speed regulation, and speed adjustable range is big; Reliable operation can steady in a long-termly be moved; The reactive power compensation on the spot function is arranged, improve more than the power factor to 0.98; The compensated torque function, promptly sustaining voltage/frequency is a constant, avoids descending when power supply frequency, causes the supersaturation of motor magnetic circuit, increases field current and makes the motor load ability drop, power factor diminishes; The protective function of frequency variator self is complete.Preventing and safety fuse cutout short-circuit protection etc. of not foot protection, overcurrent protection of input voltage, overload protection, short-circuit protection, cold sink overtemperature protection, stall arranged, improved the motor reliability of operation greatly; Motor can directly start, and inrush current is no more than 1.7 times of motor rated current, reduces the impact to electrical network and equipment; Reduce the noise and the temperature rise of motor, prolong motor working life; Easy and simple to handle, improve operating environment, reduce workman's operation intensity.
Description of drawings
For the easier quilt of content of the present utility model is clearly understood, below the specific embodiment and in conjunction with the accompanying drawings of basis, the utility model is described in further detail, wherein
Fig. 1 is the structural representation that the wheat flour manufacturing shop among the embodiment is used the fan frequency conversion control gear.
Embodiment
See Fig. 1-2, the wheat flour manufacturing shop of present embodiment comprises with the fan frequency conversion control gear: the temperature transmitter and the dust concentration transmitter that are used for controlling according to measured temperature and dust concentration fan delivery that be used to control the frequency variator of rotation speed of fan, the PLC that links to each other with the control input end of frequency variator, link to each other with PLC.Described PLC also is connected with the air quantity transmitter that is used to feed back rotation speed of fan.
Be provided with the first relay K M1 between the power output end of described frequency variator and the power input of blower fan, be provided with the second relay K M2 between the power input of frequency variator and the power input of blower fan, the power input of frequency variator is provided with the power supply relay KM that is used to connect external ac power source.
This fan frequency conversion control gear has two kinds of methods of operation: converting operation and directly operation.First relay K M1 closure during converting operation, blower fan is moved by inverter supply, be in the converting operation state, when frequency converter failure, sensor fault occurring, frequency variator is switched in requirement, and automatically blower fan is directly linked to each other with electrical network (i.e. this moment the second relay K M2 closure) makes fan operation in full-speed state.In frequency conversion and direct operation handoff procedure, must solve the Cross fade problem of two kinds of operations, promptly frequency variator must elder generation be decelerated to zeroly by running state, and then disconnects the first relay K M1, drops into the second relay K M2.This switching mode is determined by the frequency variator internal structure.
Use variable-frequency control technique and transform the air quantity that the blower fan of wheat flour manufacturing shop employing had both improved equipment operating efficiency, satisfied safety in production, reduced power consumption, device maintenance expense again.Blower fan transmission system control performance is greatly improved, energy-conservation level is greatly improved.By the actual motion of frequency variator, the combination property of blower fan has all had big improvement, and comprehensive benefit has realized maximization.Because blower fan low-frequency starting electric current is little, reduce starting torque, thereby protected motor, prolonged motor working life; Blower fan noise when normal operation obviously reduces, and has improved working environment.The frequency variator display screen is understood text prompt and is stored fault message automatically when blower fan breaks down, and has made things convenient for malfunction elimination like this, has shortened servicing time.
Obviously, the foregoing description only is for the utility model example clearly is described, and is not to be qualification to mode of execution of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all mode of executions.And these belong to conspicuous variation or the change that spirit of the present utility model extended out and still are among the protection domain of the present utility model.
Claims (3)
1. wheat flour manufacturing shop fan frequency conversion control gear is characterized in that comprising: the temperature transmitter and the dust concentration transmitter that are used for controlling according to measured temperature and dust concentration fan delivery that be used to control the frequency variator of rotation speed of fan, the PLC that links to each other with the control input end of frequency variator, link to each other with PLC.
2. wheat flour manufacturing shop fan frequency conversion control gear according to claim 1 is characterized in that: described PLC also is connected with the air quantity transmitter that is used to feed back rotation speed of fan.
3. wheat flour manufacturing shop fan frequency conversion control gear according to claim 1, it is characterized in that: be provided with first relay between the power output end of described frequency variator and the power input of blower fan, be provided with second relay between the power input of frequency variator and the power input of blower fan, the power input of frequency variator is provided with the power supply relay that is used to connect external ac power source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202963468U CN201747650U (en) | 2010-08-19 | 2010-08-19 | Air blower frequency-conversion control device used in wheat flour production workshop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202963468U CN201747650U (en) | 2010-08-19 | 2010-08-19 | Air blower frequency-conversion control device used in wheat flour production workshop |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201747650U true CN201747650U (en) | 2011-02-16 |
Family
ID=43582329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202963468U Expired - Fee Related CN201747650U (en) | 2010-08-19 | 2010-08-19 | Air blower frequency-conversion control device used in wheat flour production workshop |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201747650U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322434A (en) * | 2011-08-26 | 2012-01-18 | 浙江大学 | Control method and control system for energy saving of dust removing fan for mains frequency melting furnace |
| CN103104530A (en) * | 2012-12-13 | 2013-05-15 | 苏州新区化工节能设备厂 | Control device and working method suitable for controlling rotate speed of titanium fan |
-
2010
- 2010-08-19 CN CN2010202963468U patent/CN201747650U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322434A (en) * | 2011-08-26 | 2012-01-18 | 浙江大学 | Control method and control system for energy saving of dust removing fan for mains frequency melting furnace |
| CN102322434B (en) * | 2011-08-26 | 2014-07-16 | 浙江大学 | Control method and control system for energy saving of dust removing fan for mains frequency melting furnace |
| CN103104530A (en) * | 2012-12-13 | 2013-05-15 | 苏州新区化工节能设备厂 | Control device and working method suitable for controlling rotate speed of titanium fan |
| CN103104530B (en) * | 2012-12-13 | 2015-08-19 | 苏州市启扬商贸有限公司 | A kind of control gear and method of work being suitable for control titanium rotation speed of fan |
| CN105041699A (en) * | 2012-12-13 | 2015-11-11 | 蒋红娟 | Control device suitable for controlling rotating speed of titanium draught fan and working method of control device |
| CN105041698A (en) * | 2012-12-13 | 2015-11-11 | 蒋红娟 | Control device suitable for controlling rotating speed of titanium draught fan |
| CN105020163B (en) * | 2012-12-13 | 2017-02-08 | 林乐宗 | Control device suitable for controlling rotational speed of titanium fan and operating method of control device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110216 Termination date: 20130819 |