CN201364480Y - Motor-protective control system for low liquid level detection - Google Patents
Motor-protective control system for low liquid level detection Download PDFInfo
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- CN201364480Y CN201364480Y CNU2009200226271U CN200920022627U CN201364480Y CN 201364480 Y CN201364480 Y CN 201364480Y CN U2009200226271 U CNU2009200226271 U CN U2009200226271U CN 200920022627 U CN200920022627 U CN 200920022627U CN 201364480 Y CN201364480 Y CN 201364480Y
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Abstract
The utility model discloses a motor-protective control system for low liquid level detection, which comprises a control module used for controlling the power supply of the motor. The control system comprises a current transformation module used for collecting current information during the operation of the motor and a voltage transformation module used for collecting voltage information during the operation of the motor; the current transformation module and the voltage transformation module are in communication connection with a signal regulation module used for modulating the current information and the voltage information into current signals and voltage signals; the signal regulation module is in communication connection with a singlechip module used for judging liquid levels through the current signals and controlling the operation of the control system; and the singlechip module is connected with the control module. The control system utilizes the singlechip module to analyze the current information during the operation of the motor, so as to judge the liquid level in a container, and control the operation state of the motor according to preset corresponding parameters, thereby improving safety and controllability during liquid unloading operation, and strengthening the monitoring to the liquid level in the container.
Description
Technical field
The utility model relates to the motor device of petrochemical complex, relates in particular to a kind of low Level Detection control system of protecting motor.
Background technology
At present, petroleum chemical industry is high to the stability and the reliability requirement of motor device, the work that links together of motor and supporting machinery, when motor breaks down, bring great danger to production system easily, need in time search failure cause and eliminate fault, to guarantee the production system safe operation.Therefore, motor being carried out effectively protection is a vital task that guarantees petrochemical complex production system operate as normal.
Now in the liquid uninstall process of petroleum chemical industry, whether completion of discharge and timely disable motor of tracer liquid generates heat pump idle running and brings potential safety hazard to unloading operation automatically.Whether completion of discharge of liquid is manually checked in main dependence in uninstall process, and Xie Zai liquid is poisonous or other harm to human body sometimes, is unfavorable for the development of petroleum chemical industry.
In the prior art; the electric motor protective device that is used for petroleum chemical industry can not carry out static and discharge to the container that extracts liquid; when if static exceeds safe range; very likely initiation fire or explosion accident; at present the defencive function of electric motor protective device a little less than; can not satisfy the development of petrochemical complex, and its pointing accuracy is too low, has bigger potential safety hazard.This shows that prior art needs further improvement.
The utility model content
The utility model provides a kind of low Level Detection control system of protecting motor for solving above-mentioned defective of the prior art; by each functional module of scientific and reasonable layout; to improve the security and the controllability of liquid unloading operation process, strengthen monitoring degree to liquid level.
For solving the problems of the technologies described above, the utility model scheme comprises:
A kind of low Level Detection control system of protecting motor; it comprises the control module that is used to control motor power; wherein; described control system comprises the electric current mutual inductance module of current information when being used to gather the motor operation and is used to gather motor the mutual induction of voltage module of information of voltage when moving; electric current mutual inductance module; the mutual induction of voltage module respectively be used for current information; information of voltage is modulated to current signal; the signal adjusting module of voltage signal communicates to connect; signal adjusting module be used for judging liquid level according to above-mentioned current signal; the one-chip computer module of being responsible for described control system operation communicates to connect, and one-chip computer module is connected with control module.Control module is arranged between motor and the power supply, when machine operation, electric current mutual inductance module, the information transmission that the mutual induction of voltage module will be obtained is separately handled to signal adjusting module, the various signals that signal adjusting module will dispose are transferred to one-chip computer module and carry out respective handling, one-chip computer module manages motor power by control module according to the relevant treatment result then, and then the duty of control motor, the more important thing is that the liquid level that one-chip computer module can detect in the associated vessel according to the electric current situation of change of motor is a liquid level, control the working condition of motor according to the liquid level in the container.
Above-mentioned control system comprises electrostatic grounding detection module and the alarm module that is used to gather the static state signal, electrostatic grounding detection module, alarm module communicate to connect with one-chip computer module respectively, the electrostatic grounding detection module is transferred to one-chip computer module with detected static state signal and carries out relevant treatment, and one-chip computer module keeps according to result that motor works on or alarm operation or stop associative operations such as machine operation.The electrostatic grounding detection module is connected with the ground stud equipotential by the container of peripheral earthing device with unloaded liquid, when the electrostatic grounding detection module detects that resistance exceeds safe range between the container of unloaded liquid and the earth, the electrostatic grounding detection module is to the one-chip computer module transmission signals, and one-chip computer module will be controlled motor and quit work.
Above-mentioned one-chip computer module is provided with the people's machine mechanism that is used for input instruction, setting data.The user can be provided with or execute-in-place motor module by people's machine mechanism as required, promptly, motor continues that one-chip computer module control motor quits work more than 15 minutes or 20 minutes such as setting the undercurrent delay value when being in low liquid level duty, and also can the reset delay value.
Above-mentioned one-chip computer module is provided with the communication interface that is used for remote data transmission and Long-distance Control.One-chip computer module can be by communication interface such as RS485 serial line interface and remote machine, associated peripheral such as controller communicates to connect together in batches, thereby realize Long-distance Control such as remote data acquisition, parameter modification, warning, control, reduce working strength of workers.
Above-mentioned control module comprises the safety barrier that is used to isolate essential safety power supply, non-intrinsically safe safety power supply, with the interrupter that is used to isolate essential safety signal, non-intrinsically safe safety signal.
Above-mentioned one-chip computer module maskable electrostatic grounding detection module.The user can shield the electrostatic grounding detection module by man-machine mechanism controls one-chip computer module as required.
A kind of low Level Detection control system of protecting motor that the utility model provides, be responsible for the operation of The whole control system by one-chip computer module, electric current mutual inductance module and mutual induction of voltage module have been increased simultaneously, improved the security and the controllability of liquid unloading operation process greatly, strengthened monitoring degree liquid level in the container; Especially this control system also is provided with maskable electrostatic grounding detection module, when detecting, the electrostatic grounding detection module also cause motor to quit work when resistance exceeds safe range between the container of unloaded liquid and the earth, strengthen the security of unloading liquid, reduced the potential safety hazard of machine operation.
Description of drawings
Fig. 1 is the low Level Detection control system structural representation of protection motor in the utility model.
Embodiment
Below with reference to accompanying drawing, comparatively detailed explanation is carried out in each preferred embodiment to the utility model.
The utility model provides a kind of low Level Detection control system of protecting motor; in the protective device of motor, increase one-chip computer module; various signals in the process control system are also made corresponding control operation; the security and the controllability of liquid unloading operation process have been improved; strengthened monitoring degree to liquid level in the container; strengthen the security of unloading liquid, reduced the potential safety hazard of machine operation.The structure of the low Level Detection control system of protection motor as shown in Figure 1, it comprises the control module that is used to control motor power, the best results of control module between motor and motor power; Described control system also comprises the electric current mutual inductance module of current information when being used to gather the motor operation and is used to gather motor the mutual induction of voltage module of information of voltage when moving, electric current mutual inductance module, mutual induction of voltage module communicate to connect with the signal adjusting module that is used for current information, information of voltage are modulated to current signal, voltage signal respectively, signal adjusting module communicates to connect with the one-chip computer module that is used for according to above-mentioned current signal judgement liquid level, responsible described control system operation, and one-chip computer module is connected with control module.When machine operation, the information transmission that electric current mutual inductance module, mutual induction of voltage module will be obtained is separately handled to signal adjusting module, the various signals that signal adjusting module will dispose are transferred to one-chip computer module and carry out respective handling, one-chip computer module manages motor power by control module according to the relevant treatment result then, and then the duty of control motor, the more important thing is that the liquid level that one-chip computer module can detect in the associated vessel according to the electric current situation of change of motor is a liquid level, control the working condition of motor according to the liquid level in the container.One-chip computer module claims miniature processor controls again, and one-chip computer module technology of the prior art is very ripe, and the above-mentioned course of work can not repeat them here for the one-chip computer module control flow by stable the finishing of one-chip computer module.
In order further to strengthen security performance of the present utility model, control system also is provided with electrostatic grounding detection module and the alarm module that is used to gather the static state signal, electrostatic grounding detection module, alarm module communicate to connect with one-chip computer module respectively, the electrostatic grounding detection module is led the static that removes on the container of unloaded liquid, and detected static state signal is transferred to one-chip computer module carries out relevant treatment, one-chip computer module keeps according to result that motor works on or alarm operation or stop associative operations such as machine operation.The electrostatic grounding detection module is connected with the ground stud equipotential by the container of peripheral earthing device with unloaded liquid, when the electrostatic grounding detection module detects that resistance exceeds safe range between the container of unloaded liquid and the earth, the electrostatic grounding detection module is to the one-chip computer module transmission signals, and one-chip computer module will be controlled motor and quit work.And one-chip computer module is provided with the people's machine mechanism that is used for input instruction, setting data; The user can be provided with or execute-in-place motor module by people's machine mechanism as required, promptly, motor continues that one-chip computer module control motor quits work more than 20 minutes such as setting the undercurrent delay value when being in low liquid level duty, and also can the reset delay value.One-chip computer module is provided with the communication interface that is used for remote data transmission and Long-distance Control, can be by this communication interface such as RS485 serial line interface and remote machine, associated peripheral such as controller communicates to connect together in batches, thereby realize operated from a distances such as remote data acquisition, parameter modification, warning, control, reduce working strength of workers.In control module, also be provided with safety barrier of isolating essential safety power supply, non-intrinsically safe safety power supply and the interrupter that is used to isolate essential safety signal, non-intrinsically safe safety signal, the antijamming capability of the system that further tightens control.And the user can shield the electrostatic grounding detection module by man-machine mechanism controls one-chip computer module as required.According to foregoing description as can be known, by electric current mutual inductance module, mutual induction of voltage module the relevant information of motor is sent to one-chip computer module analysis, and according to the liquid level in the Data Detection container that one-chip computer module is set in advance, and then the duty of control motor, improve the security and the controllability of liquid unloading operation process greatly, reduced the potential safety hazard of machine operation.
In order further to set forth the utility model, existing gasoline is that example describes in the container once to unload.The low Level Detection control system of protection motor is installed to the unloading motor that is used for driving pump work, control module is arranged between unloading motor and the unloading motor power, electric current mutual inductance module and mutual induction of voltage module also are connected on the unloading motor, and set the correlation parameter of one-chip computer module by people's machine mechanism, reset delay value for example, the undercurrent delay value, the electric current changing value, voltage change, motor current value when hanging down liquid level, related parameter values such as static alarming value, only with the undercurrent delay value be 15 minutes be example, and by RS485 serial line interface and remote machine, associated peripheral such as batch controller communicate to connect together, and the user can reset correlation parameter according to actual needs; The electrostatic grounding detection module is connected with the ground stud equipotential by the container of peripheral earthing device with unloaded liquid.When unloading gasoline liquid, one-chip computer module control unloading motor is started working, gasoline at the uniform velocity unloads, in uninstall process when the resistance between gasoline container and the earth exceeds safe range in the container static can not lead in real time except that the time, the electrostatic grounding detection module is to one-chip computer module transmission static alerting signal, the one-chip computer module control warning module is reported to the police and is stopped to unload machine operation synchronously, resistance between gasoline container and the earth returns to safe range, and reset delay value then after, one-chip computer module control unloading motor restarts work; Gasoline continues at the uniform velocity unloading, when the gasoline in the container is in low liquid level, bigger variation can take place in the working current of unloading motor, motor current value was judged liquid level in the container when one-chip computer module basis was hanged down liquid level, operation is after 15 minutes under low fluid level condition when the unloading motor, and one-chip computer module control unloading motor quits work, and prevents motor idle running heating, reducing potential safety hazard, and can guarantee that gasoline is unloaded and finish.And in the above-mentioned course of work, single-chip microcomputer detects the unloading motor when other unusual conditions are arranged, single-chip microcomputer is also reported to the police control warning module and synchro control unloading motor quits work, remind the staff in time to carry out fault handling, improve the security and stability of uninstall process, the electrostatic grounding detection module continues in this process to one-chip computer module transmission static state signal.Related parameter values such as motor current value, static alarming value can be a concrete numerical value when resetting delay value, undercurrent delay value, electric current changing value, voltage change, low liquid level in said process, also can be numerical range, the user can set according to actual conditions, and the user also can shield the electrostatic grounding detection module by one-chip computer module.Hence one can see that, and the utility model can prevent in protection that motor idle running from can in time lead again in the motor and destatic, and has strengthened the security of unloading liquid, has reduced the potential safety hazard of machine operation, is a much progress of prior art.
In sum, the utility model provides a kind of low Level Detection control system of protecting motor, be responsible for the operation of The whole control system by one-chip computer module, electric current mutual inductance module and mutual induction of voltage module have been increased simultaneously, liquid level in current information during by the analysis machine operation and then the judgement container, and control the operation conditions of motor according to predefined correlation parameter, and improved the security and the controllability of liquid unloading operation process, strengthened monitoring degree to liquid level in the container; Especially this control system also is provided with and can selects the electrostatic grounding detection module that uses, when detecting, the electrostatic grounding detection module also cause motor to quit work when resistance exceeds safe range between the container of unloaded liquid and the earth, strengthened the security of unloading liquid, having reduced the potential safety hazard of machine operation, is the very big progress of prior art.
Should be understood that; it is comparatively detailed that above-mentioned each preferred embodiment is described; but should not be construed as restriction of the present utility model; protection domain of the present utility model should be as the criterion with claims, and those skilled in the art are subjected to enlightenment of the present utility model simply to replace, make up or be out of shape should to fall in the protection domain of the present utility model.
Claims (5)
1; a kind of low Level Detection control system of protecting motor; it comprises the control module that is used to control motor power; it is characterized in that: described control system comprises the electric current mutual inductance module of current information when being used to gather the motor operation and is used to gather motor the mutual induction of voltage module of information of voltage when moving; electric current mutual inductance module; the mutual induction of voltage module respectively be used for current information; information of voltage is modulated to current signal; the signal adjusting module of voltage signal communicates to connect; signal adjusting module be used for judging liquid level according to above-mentioned current signal; the one-chip computer module of being responsible for described control system operation communicates to connect, and one-chip computer module is connected with control module.
2, control system according to claim 1, it is characterized in that: described control system comprises electrostatic grounding detection module and the alarm module that is used to gather the static state signal, and electrostatic grounding detection module, alarm module communicate to connect with one-chip computer module respectively.
3, control system according to claim 1 and 2 is characterized in that: described one-chip computer module is provided with the people's machine mechanism that is used for input instruction, setting data.
4, control system according to claim 3 is characterized in that: described one-chip computer module is provided with the communication interface that is used for remote data transmission and Long-distance Control.
5, control system according to claim 3 is characterized in that: described control module comprises the safety barrier and the interrupter that is used to isolate essential safety signal, non-intrinsically safe safety signal that is used to isolate essential safety power supply, non-intrinsically safe safety power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200226271U CN201364480Y (en) | 2009-02-27 | 2009-02-27 | Motor-protective control system for low liquid level detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200226271U CN201364480Y (en) | 2009-02-27 | 2009-02-27 | Motor-protective control system for low liquid level detection |
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| Publication Number | Publication Date |
|---|---|
| CN201364480Y true CN201364480Y (en) | 2009-12-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2009200226271U Expired - Fee Related CN201364480Y (en) | 2009-02-27 | 2009-02-27 | Motor-protective control system for low liquid level detection |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103930842A (en) * | 2012-09-28 | 2014-07-16 | 广东松下环境系统有限公司 | Water level control apparatus and water level control method for micro-mist sauna apparatus |
| CN107495866A (en) * | 2017-05-26 | 2017-12-22 | 浙江绍兴苏泊尔生活电器有限公司 | food processor and control method |
-
2009
- 2009-02-27 CN CNU2009200226271U patent/CN201364480Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103930842A (en) * | 2012-09-28 | 2014-07-16 | 广东松下环境系统有限公司 | Water level control apparatus and water level control method for micro-mist sauna apparatus |
| CN103930842B (en) * | 2012-09-28 | 2017-04-12 | 广东松下环境系统有限公司 | Water level control apparatus and water level control method for micro-mist sauna apparatus |
| CN107495866A (en) * | 2017-05-26 | 2017-12-22 | 浙江绍兴苏泊尔生活电器有限公司 | food processor and control method |
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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: 20091216 Termination date: 20130227 |