CN215827902U - Anti-blocking system of limestone screw feeder - Google Patents
Anti-blocking system of limestone screw feeder Download PDFInfo
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- CN215827902U CN215827902U CN202122343378.XU CN202122343378U CN215827902U CN 215827902 U CN215827902 U CN 215827902U CN 202122343378 U CN202122343378 U CN 202122343378U CN 215827902 U CN215827902 U CN 215827902U
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- screw feeder
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Abstract
The utility model discloses an anti-blocking system of a limestone screw feeder, wherein a current signal output end and a frequency signal output end of a frequency converter are both electrically connected with a signal input end of a controller, the signal output end of the controller is electrically connected with an electromagnetic coil of a forward relay and an electromagnetic coil of a reverse relay, the forward signal input end of the frequency converter is connected with a normally open contact of the forward relay, and the reverse signal input end of the frequency converter is connected with a normally open contact of the reverse relay. When the spiral feeder is stuck, the current of the motor detected in the frequency converter is increased, the current signal and the frequency signal of the motor collected by the frequency converter are sent to the controller, the controller controls the motor to rotate reversely, the spiral feeder rotates reversely, and the stuck limestone powder is loosened, so that the phenomenon that the normal operation of the production system is affected by the sticking of the spiral feeder is avoided.
Description
The technical field is as follows:
the utility model relates to the field of urea production, in particular to an anti-blocking system of a limestone screw feeder.
Background art:
in urea production, the boiler is used for producing the required steam in the production process, and its raw materials are the coal, for reaching the environmental protection requirement, need add the lime stone in boiler furnace in order to get rid of the sulfuration gas that generates in the flue gas, but in the in-service use in-process, often cause the lime stone screw feeder card to die because of lime stone granularity and equipment reason, cause the converter overcurrent protection, cause the tripping operation of motor place circuit or motor overheat to burn out, lead to boiler limestone system can not normal work, the boiler discharges the flue gas and exceeds standard.
The utility model has the following contents:
the utility model aims to provide an anti-blocking system of a limestone screw feeder.
The utility model is implemented by the following technical scheme:
the utility model provides a lime stone screw feeder anti-sticking system, includes lime stone powder storehouse, the discharge gate in lime stone powder storehouse is connected with screw feeder's feed inlet, screw feeder's discharge gate and pneumatic conveying headtotail, the power input end of screw feeder's motor is connected with the power output end of converter, the current signal output part and the frequency signal output part of converter all are connected with the signal input part electricity of controller the signal output part electricity of controller is connected with corotation relay's solenoid and reversal relay's solenoid corotation signal input part is connected with corotation relay's normally open contact the reversal signal input part of converter is connected with reversal relay's normally open contact.
Preferably, the system further comprises a DCS system, a control signal output end of the DCS system is connected with a signal input end of the controller, and a signal input end of the DCS system is connected with a normally open contact of the forward rotation relay and a normally open contact of the reverse rotation relay.
The utility model has the advantages that: when the spiral feeder is stuck, the current of the motor detected in the frequency converter is increased, the current signal and the frequency signal of the motor collected by the frequency converter are sent to the controller, the controller controls the motor to rotate reversely, the spiral feeder rotates reversely, and the stuck limestone powder is loosened, so that the phenomenon that the normal operation of the production system is affected by the sticking of the spiral feeder is avoided.
Description of the drawings:
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic diagram of the control circuit of the present invention.
In the figure: limestone powder bin 1, screw feeder 2, motor 2.1, frequency converter 3, DCS system 4, controller 5, forward relay 6 and reverse relay 7.
The specific implementation mode is as follows:
as shown in fig. 1 and 2, an anti-seize system of a limestone screw feeder comprises a limestone powder bin 1, wherein a discharge port of the limestone powder bin 1 is connected with a feed port of the screw feeder, a discharge port of the screw feeder is connected with an air conveying system, a power input end of a motor 2.1 of the screw feeder is connected with a power supply output end of a frequency converter 3, a current signal output end and a frequency signal output end of the frequency converter 3 are both electrically connected with a signal input end of a controller 5, an electromagnetic coil of a forward relay 6 and an electromagnetic coil of a reverse relay 7 are electrically connected with a signal output end of the controller 5, a normally open contact of the forward relay 6 is connected with the forward signal input end of the frequency converter 3, and a normally open contact of the reverse relay 7 is connected with the reverse signal input end of the frequency converter 3;
in normal use, the controller 5 controls the electromagnetic coil of the forward rotation relay 6 to be electrified, the normally open contact of the forward rotation relay 6 is closed, the forward rotation signal input end of the frequency converter 3 receives a signal, the motor 2.1 rotates forwards, and the screw feeder feeds materials normally; when the spiral feeder is stuck, the current of the motor 2.1 detected in the frequency converter 3 is increased, the current signal and the frequency signal of the motor 2.1 acquired by the frequency converter 3 are sent to the controller 5, the controller 5 controls the electromagnetic coil of the forward relay 6 to lose power, the normally open contact of the forward relay 6 is disconnected, the motor 2.1 stops rotating in forward rotation, the electromagnetic coil of the reverse relay 7 is powered on, the normally open contact of the reverse relay 7 is closed, the reverse signal input end of the frequency converter 3 receives a signal, the motor 2.1 rotates reversely, the spiral feeder rotates reversely, and the stuck limestone powder is loosened; after the motor 2.1 rotates reversely for 15 minutes, the controller 5 controls the electromagnetic coil of the forward rotation relay 6 to be electrified, the normally open contact of the forward rotation relay 6 is closed, and the motor 2.1 rotates normally;
the intelligent control system also comprises a DCS (distributed control system) 4, wherein a control signal output end of the DCS 4 is connected with a signal input end of the controller 5, and a signal input end of the DCS 4 is connected with a normally open contact of a forward relay 6 and a normally open contact of a reverse relay 7; the DCS system 4 can remotely control the controller 5; and after the electromagnetic coil of the forward relay 6 or the electromagnetic coil of the reverse relay 7 is electrified, the normally open contact of the forward relay 6 or the normally open contact of the reverse relay 7 is switched on, a signal is sent into the DCS system 4, and the rotation state of the motor 2.1 is monitored through the DCS system 4.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (2)
1. The utility model provides a lime stone screw feeder anti-sticking system, includes lime stone powder storehouse, the discharge gate in lime stone powder storehouse is connected with screw feeder's feed inlet, screw feeder's discharge gate and pneumatic conveying headtotail, the power input end of screw feeder's motor is connected with the power output end of converter, a serial communication port, the current signal output part and the frequency signal output part of converter all are connected with the signal input part electricity of controller the signal output part electricity of controller is connected with corotation relay's solenoid and reversal relay's solenoid corotation signal input part of converter is connected with corotation relay's normally open contact the reversal signal input part of converter is connected with reversal relay's normally open contact.
2. The anti-sticking system of the limestone screw feeder according to claim 1, further comprising a DCS system, wherein a control signal output end of the DCS system is connected with a signal input end of the controller, and a signal input end of the DCS system is connected with a normally open contact of the forward rotation relay and a normally open contact of the reverse rotation relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122343378.XU CN215827902U (en) | 2021-09-26 | 2021-09-26 | Anti-blocking system of limestone screw feeder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122343378.XU CN215827902U (en) | 2021-09-26 | 2021-09-26 | Anti-blocking system of limestone screw feeder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215827902U true CN215827902U (en) | 2022-02-15 |
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ID=80201299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122343378.XU Active CN215827902U (en) | 2021-09-26 | 2021-09-26 | Anti-blocking system of limestone screw feeder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215827902U (en) |
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2021
- 2021-09-26 CN CN202122343378.XU patent/CN215827902U/en active Active
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