CN211573850U - Multistage centrifugal fan cabinet on spot - Google Patents
Multistage centrifugal fan cabinet on spot Download PDFInfo
- Publication number
- CN211573850U CN211573850U CN201922491116.0U CN201922491116U CN211573850U CN 211573850 U CN211573850 U CN 211573850U CN 201922491116 U CN201922491116 U CN 201922491116U CN 211573850 U CN211573850 U CN 211573850U
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- China
- Prior art keywords
- centrifugal fan
- controller
- temperature sensor
- sensor
- motor
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 11
- 239000001301 oxygen Substances 0.000 claims abstract description 11
- 238000004804 winding Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 description 6
- 238000004891 communication Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
The utility model discloses a multistage centrifugal fan in-place cabinet, which comprises a controller and a display panel connected with the controller; the controller is connected with a centrifugal fan; the controller is still connected a dissolved oxygen sensor, centrifugal fan passes through the motor and is connected with the controller, be equipped with a bypass valve on centrifugal fan's the air-out pipeline, the bypass valve is connected with the controller. The local cabinet of the utility model can monitor the information detected by the dissolved oxygen sensor in real time, automatically match the blast volume of the multistage centrifugal fan according to the actual dissolved oxygen demand, realize refined blast, greatly reduce the power consumption of the motor to a certain extent, and avoid the motor overload; meanwhile, if the surge point of the centrifugal fan is detected during operation, the bypass valve is opened in time to increase the air quantity, so that the surge point of the centrifugal fan is avoided.
Description
Technical Field
The utility model relates to an electric control field, in particular to multistage centrifugal fan is cabinet in place.
Background
When the multistage centrifugal fan is used for treating sewage, surge can occur when the air flow is reduced due to the requirement of a sewage treatment process. The multistage centrifugal fan generates surge, so that the fan cannot work normally, and the safety of the fan is seriously endangered. When surging takes place, because the air current is strong pulsation and periodic oscillation, the noise aggravates, this not only makes centrifugal fan's blade stress greatly increased, brings very big impact to air supply part welding seam, connection rivet, makes main shaft and bearing moreover, the axial force greatly increased of bearing and bearing frame, can directly harm air supply part, main shaft, bearing frame and ground. If the machine is not stopped immediately, the machine is in danger of being scrapped and damaging the foundation, and the personal safety of workers is endangered. Therefore, the existing centrifugal fan usually has a surge phenomenon, which causes the damage of the fan. In the current design, surging is reduced by adding an anti-surging piece, but the multistage centrifugal fan with the structure is structurally complex, and the motor is easily overloaded in the long-term use process.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the multistage centrifugal fan on-site cabinet is used for safe starting and can prevent fan surging and motor overload.
The utility model provides a technical scheme that above-mentioned problem adopted does: a multi-stage centrifugal fan on-site cabinet comprises a controller and a display panel connected with the controller; the controller is connected with a centrifugal fan; the controller is still connected a dissolved oxygen sensor, centrifugal fan passes through the motor and is connected with the controller, be equipped with a bypass valve on centrifugal fan's the air-out pipeline, the bypass valve is connected with the controller.
Compared with the prior art, the utility model has the advantages of: the on-site cabinet can monitor the information detected by the dissolved oxygen sensor in real time, and automatically match the blast volume of the multi-stage centrifugal fan according to the actual dissolved oxygen demand, so that refined blast can be realized, the power consumption of the motor is greatly reduced to a certain extent, and the motor overload is avoided; meanwhile, if the surge point of the centrifugal fan is detected during operation, the bypass valve is opened in time to increase the air quantity, so that the surge point of the centrifugal fan is avoided.
Preferably, be equipped with first temperature sensor and pressure sensor in centrifugal fan's the intake stack, centrifugal fan's bearing side is equipped with second temperature sensor and first vibration sensor, first temperature sensor, second temperature sensor, pressure sensor and first vibration sensor all are connected with the controller. The air inlet temperature and the bearing temperature of the centrifugal fan are detected in real time, the air quantity of the centrifugal fan is adjusted conveniently through calculation, and the output air quantity of the centrifugal fan is guaranteed to be unchanged at different temperatures.
Preferably, the motor bearing side is equipped with third temperature sensor and second vibration sensor, the winding side of motor is equipped with fourth temperature sensor, third temperature sensor, fourth temperature sensor and second vibration sensor all are connected with the controller. Like this, through the temperature that detects motor bearing and winding, can avoid the motor to transship, make things convenient for the operating condition of controller adjustment each motor.
Preferably, the expansion module comprises a temperature input module, and the temperature input module is connected with the first temperature sensor, the second temperature sensor, the third temperature sensor and the fourth temperature sensor. Therefore, the temperature input module can conveniently process each detected temperature information and is connected with the controller, and the processing is convenient.
Preferably, the expansion module comprises a current input module, the first vibration sensor and the second vibration sensor are both connected with the current input module, and the centrifugal fan is connected with the controller through the current input module. Therefore, the current input module can process the current signal of the vibration sensor in time, and the surge point can be conveniently detected.
Preferably, the emergency stop switch also comprises a circuit breaker, a transformer, a load switch, a signal isolator, a relay, a terminal and an emergency stop switch which are connected with the controller.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
The reference numbers in the figures illustrate: 1. the device comprises a controller, 2, a centrifugal fan, 3, a display panel, 4, a dissolved oxygen sensor, 5, a bypass valve, 6, a temperature input module, 7 and a current input module.
Detailed Description
Embodiments of the present invention are further described below with reference to the accompanying drawings.
As shown in fig. 1, the present embodiment relates to a multistage centrifugal fan in-place cabinet, which includes a controller 1 and a display panel 3 connected to the controller 1, wherein the controller 1 is connected to a centrifugal fan 2.
In this embodiment, the controller 1 is further connected to a dissolved oxygen sensor 4, the centrifugal fan 2 is connected to the controller 1 through a motor, a bypass valve 5 is disposed on an air outlet pipeline of the centrifugal fan 2, and the bypass valve 5 is connected to the controller 1.
Wherein, be equipped with first temperature sensor and pressure sensor in centrifugal fan 2's the intake stack, centrifugal fan 2's bearing side is equipped with second temperature sensor and first vibration sensor, and first temperature sensor, second temperature sensor, pressure sensor and first vibration sensor all are connected with controller 1. The air inlet temperature and the bearing temperature of the centrifugal fan are detected in real time, the air quantity of the centrifugal fan 2 is adjusted conveniently through calculation, and the output air quantity of the centrifugal fan 2 is guaranteed to be unchanged at different temperatures.
In this embodiment, motor bearing side is equipped with third temperature sensor and second vibration sensor, and the winding side of motor is equipped with fourth temperature sensor, and third temperature sensor, fourth temperature sensor and second vibration sensor all are connected with controller 1. The overload of the motor can be avoided by detecting the temperature of the motor bearing and the temperature of the winding, and the controller can conveniently adjust the working condition of each motor.
The first vibration sensor and the second vibration sensor detect a current value, which can be displayed on the display panel 3 for displaying a motor current value of the centrifugal fan 2. The display panel 3 can also display the temperature value in the air inlet pipeline of the centrifugal fan. In actual use, the status of the local cabinet, including ready, on start, running, fault and alarm, is also displayed on the display panel 3. The display panel 3 should also be provided with fault, data, maintenance and version information.
When the centrifugal fan 2 approaches the surge point, the controller controls the bypass valve 5 to be opened, and adjusts the opening degree of the bypass valve at the current value detected by the first vibration sensor and the second vibration sensor.
In this embodiment, the multistage centrifugal fan cabinet-in-place also includes an extension module, and the extension module includes temperature input module 6, and temperature input module 6 is connected with first temperature sensor, second temperature sensor, third temperature sensor and fourth temperature sensor. The temperature input module 6 can conveniently process each detected temperature information, and is connected with the controller 1, so that the processing is convenient. Wherein, the temperature input module 6 can be a PT100 temperature input module.
In the actual use process, the controller can be a MPC3010 controller special for the centrifugal fan, a stainless steel shell, a digital quantity analog quantity input and output unit is integrated in the controller, RS485 communication is realized, the controller is matched with a display panel for use, and the controller can be connected with an expansion module to increase digital quantity analog quantity input and output points and a profibus-DP communication module.
The expansion module comprises a current input module 7, the first vibration sensor and the second vibration sensor are both connected with the current input module 7, and the centrifugal fan 2 is connected with the controller 1 through the current input module 7. Through the current input module 7, the current signal of the vibration sensor is processed in time, so that the surge point is convenient to detect. Wherein, the current input module 7 can be a 4-20mA input module.
The multi-stage centrifugal fan on-site cabinet also comprises a circuit breaker, a transformer, a load switch, a signal isolator, a relay, a terminal and an emergency stop switch which are connected with the controller.
The utility model has the advantages that: the on-site cabinet can monitor the information detected by the dissolved oxygen sensor in real time, and automatically match the blast volume of the multi-stage centrifugal fan according to the actual dissolved oxygen demand, so that refined blast can be realized, the power consumption of the motor is greatly reduced to a certain extent, and the motor overload is avoided; meanwhile, if the surge point of the centrifugal fan is detected during operation, the bypass valve is opened in time to increase the air quantity, so that the surge point of the centrifugal fan is avoided.
While the foregoing description shows and describes several preferred embodiments of the invention, it is to be understood, as noted above, that the invention is not limited to the forms disclosed herein, but is not intended to be exhaustive or to exclude other embodiments and may be used in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.
Claims (6)
1. The utility model provides a multistage centrifugal fan is cabinet on ground which characterized in that: comprises a controller and a display panel connected with the controller; the controller is connected with a centrifugal fan; the controller is still connected a dissolved oxygen sensor, centrifugal fan passes through the motor and is connected with the controller, be equipped with a bypass valve on centrifugal fan's the air-out pipeline, the bypass valve is connected with the controller.
2. The multi-stage centrifugal fan in-place cabinet of claim 1, wherein: the centrifugal fan is characterized in that a first temperature sensor and a pressure difference sensor are arranged in an air inlet pipeline of the centrifugal fan, a second temperature sensor and a first vibration sensor are arranged on the side edge of a bearing of the centrifugal fan, and the first temperature sensor, the second temperature sensor, the pressure difference sensor and the first vibration sensor are all connected with a controller.
3. The multi-stage centrifugal fan in-place cabinet of claim 2, wherein: the motor bearing side is equipped with third temperature sensor and second vibration sensor, the winding side of motor is equipped with fourth temperature sensor, third temperature sensor, fourth temperature sensor and second vibration sensor all are connected with the controller.
4. The multi-stage centrifugal fan in-place cabinet of claim 3, wherein: still include an extension module, the extension module includes temperature input module, temperature input module is connected with first temperature sensor, second temperature sensor, third temperature sensor and fourth temperature sensor.
5. The multistage centrifugal fan in-place cabinet of claim 4, characterized in that: the expansion module comprises a current input module, the first vibration sensor and the second vibration sensor are connected with the current input module, and the centrifugal fan is connected with the controller through the current input module.
6. The multi-stage centrifugal fan in-place cabinet of claim 1, wherein: the emergency stop circuit further comprises a circuit breaker, a transformer, a load switch, a signal isolator, a relay, a terminal and an emergency stop switch which are connected with the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922491116.0U CN211573850U (en) | 2019-12-31 | 2019-12-31 | Multistage centrifugal fan cabinet on spot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922491116.0U CN211573850U (en) | 2019-12-31 | 2019-12-31 | Multistage centrifugal fan cabinet on spot |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211573850U true CN211573850U (en) | 2020-09-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922491116.0U Expired - Fee Related CN211573850U (en) | 2019-12-31 | 2019-12-31 | Multistage centrifugal fan cabinet on spot |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211573850U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112761980A (en) * | 2021-01-22 | 2021-05-07 | 中车青岛四方机车车辆股份有限公司 | Method and system for evaluating performance of cooling fan for motor train unit |
-
2019
- 2019-12-31 CN CN201922491116.0U patent/CN211573850U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112761980A (en) * | 2021-01-22 | 2021-05-07 | 中车青岛四方机车车辆股份有限公司 | Method and system for evaluating performance of cooling fan for motor train unit |
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| 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: 20200925 |
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| CF01 | Termination of patent right due to non-payment of annual fee |