CN218161784U - Scraper motor protection device - Google Patents
Scraper motor protection device Download PDFInfo
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- CN218161784U CN218161784U CN202220568718.0U CN202220568718U CN218161784U CN 218161784 U CN218161784 U CN 218161784U CN 202220568718 U CN202220568718 U CN 202220568718U CN 218161784 U CN218161784 U CN 218161784U
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Abstract
The utility model relates to a scrape trigger motor protection device, include: the permanent magnet, the protection circuit, the driving motor and the rotating shaft; the driving motor is fixedly connected with the rotating shaft; the permanent magnet is adsorbed on the rotating shaft; the protection circuit is respectively electrically connected with the driving motor and the rotating shaft; when the driving motor works, the permanent magnet is driven to rotate through the rotating shaft, and a magnetic field signal is provided for the protection circuit; the protection circuit judges the state of the driving motor according to the state of the magnetic field signal, and when the state of the driving motor is abnormal, the protection circuit controls the driving motor to stop. The utility model provides a pair of scrape trigger motor protection device drives the pivot through driving motor and rotates, and the permanent magnet provides periodic magnetic field for protection circuit along with the rotation of pivot, and whether driving motor breaks down is judged according to the situation of change in magnetic field to the protection circuit, and when driving motor broke down, control driving motor shut down, avoided scraping trigger's driving motor to burn out.
Description
Technical Field
The utility model relates to a scrape trigger technical field, especially relate to a scrape trigger motor protection device.
Background
The scraper is a transportation machine used on the working face of coal mining. The scraper is easy to have the phenomenon of material blockage in the working process, and if the material blockage phenomenon is not timely treated, the motor of the scraper is possibly burnt out to cause irrecoverable consequences.
At present, the existing scraper conveyor commonly uses several protection modes: the mechanical swing rod type protection device is characterized in that a trigger swing rod is arranged above a scraper conveyor and is in contact with a scraper of the scraper conveyor, and the trigger swing rod is used for triggering a proximity switch to act and outputting a signal through transmission of a mechanical device, so that protection measures such as alarming are taken. A tail wheel transmission type protection device is characterized in that a round hole is formed in the center of a tail wheel bearing end cover, a screw rod is extended from the shaft end and extends to the outside of the end cover through an opening on the bearing end cover, and the running state of a scraper conveyor is detected through a screw rod which is detected by a proximity switch and synchronously rotates with a scraper shaft. A set of proximity switches is arranged above a scraper conveyor, and whether the operation of the scraper is normal or not is judged through a feedback signal of the proximity switches.
For the mechanical swing rod type protection device, when the scraper plate runs, the swing rod device is triggered to contact with the scraper plate, the switch is triggered to act through the movement of the swing rod, the detection response time is unstable, the phenomenon of leading triggering or lagging triggering of the switch often occurs, errors are easy to occur, and the misoperation rate of the device is high. For the tail wheel transmission type protection device, when the detection distance is not adjusted properly or a problem occurs in a detection loop, misoperation parking can be caused; the scraper cannot be protected when the scraper is inclined or the chain is broken at one side. For the double-proximity switch type protection device, the proximity switch has a short detection distance, when the scraper slightly floats up and down in the operation process, a fault can be reported by mistake, and the switch is easy to be damaged by collision.
SUMMERY OF THE UTILITY MODEL
In view of this, it is necessary to provide a scraper motor protection device to solve the problems in the prior art that the status of the scraper is not timely determined and the device is prone to malfunction.
In order to achieve the technical purpose, the utility model adopts the following technical proposal:
in a first aspect, the utility model provides a scrape trigger motor protection device, include: the permanent magnet, the protection circuit, the driving motor and the rotating shaft; the driving motor is connected with the rotating shaft; the permanent magnet is adsorbed on the rotating shaft; the protection circuit is respectively electrically connected with the driving motor and the rotating shaft;
when the driving motor works, the permanent magnet is driven to rotate through the rotating shaft, and a magnetic field signal is provided for the protection circuit;
the protection circuit judges the state of the driving motor according to the state of the magnetic field signal, and when the state of the driving motor is abnormal, the protection circuit controls the driving motor to stop.
Preferably, the protection circuit includes: the method comprises the following steps: the control circuit, the Hall circuit, the power supply circuit, the red light indicating circuit and the isolating circuit; the control circuit is respectively electrically connected with the Hall circuit and the isolation circuit; the power circuit is respectively and electrically connected with the red light indicating circuit, the control circuit and the Hall circuit;
the Hall circuit is used for generating a pulse signal according to a magnetic field signal of the permanent magnet on the rotating shaft; the control circuit judges the state of the driving motor according to the pulse signal and sends a control instruction to the red light indicating circuit; the power supply circuit is used for supplying power to the scraper motor protection device; the red light indicating circuit is used for stopping the driving motor according to the control instruction; the isolation circuit is used for ensuring the safety of the circuit.
Preferably, the control circuit includes: the connector ISP and the single chip microcomputer chip U1; a first pin of the connector ISP is electrically connected with a second pin of the singlechip chip U1; a pin II of the connector ISP is electrically connected with a pin V of the singlechip chip U1; the pin III of the connector ISP is electrically connected with the pin VI of the singlechip chip U1; the pin IV of the connector ISP and the pin IV of the singlechip chip U1 are respectively grounded; the pin II of the singlechip chip U1 is also connected with a second voltage;
the Hall circuit includes: a Hall device U2; a second pin of the Hall device U2 is grounded; a third pin of the Hall device U2 is electrically connected with a seventh pin of the singlechip chip U1;
the red light indicating circuit includes: an energized solenoid K1, armatures 1, 3; the armatures 1 and 3 are electrically connected with a driving motor;
the isolated circuit includes: the optical coupler isolator J1 and the resistor R3; a pin I of the optocoupler isolator J1 is electrically connected with a pin III of the singlechip chip U1; a pin II of the optocoupler isolator J1 is electrically connected with one end of a resistor R3; a pin III of the optical coupling isolator J1 is electrically connected with a pin II of the electrified solenoid K1; a fourth pin of the optocoupler isolator J1 is grounded;
the Hall device U2 generates a pulse signal according to the magnetic field signal, and the pulse signal is sent to the single chip U1 from a third pin of the Hall device U2; when the singlechip chip U1 judges that the driving motor is abnormal according to the state of the pulse signal, a control instruction is sent to the optocoupler isolator J1 from a third pin of the singlechip chip U1; the optical coupling isolator J1 sends an electric signal to the electrified solenoid K1 from a third pin of the optical coupling isolator J1 according to a control instruction; the electrified solenoid K1 is electrified according to the electric signal to generate magnetic force to connect the armatures 1 and 3, thereby controlling the driving motor to stop.
Preferably, the hall circuit further includes: resistors R2, R7; a first pin of the Hall device U2 is electrically connected with one end of the resistor R7, and a third pin of the Hall device U2 is electrically connected with one end of the resistor R2; the other end of the resistors R2 and R7 is connected with a second voltage.
Preferably, the power supply circuit includes: a conversion circuit and an adaptation circuit; the conversion circuit is electrically connected with the adaptation circuit; the adapter circuit is externally connected with a power supply;
the adapter circuit converts the voltage of an external power supply into a first voltage; the conversion circuit converts the first voltage into a second voltage.
Preferably, the adaptation circuit comprises: a power adapter U4; a first pin and a second pin of the power adapter U4 are input pins, and a third pin is an output pin; an input pin of the power adapter U4 is externally connected with a power supply; an output pin of the power adapter U4 is electrically connected with a first pin of the electrified solenoid K1; pin four of power adapter U4 is connected to ground.
Preferably, the conversion circuit includes: a conversion chip U3, and capacitors C1 and C2; a first pin of the conversion chip U3 is electrically connected with a third pin of the power adapter U4; a third pin of the conversion chip U3 is connected with one end of the capacitor C2; a third pin of the conversion chip U3 is electrically connected with the other end of the resistor R3; the other end of the capacitor C2 is grounded; a pin II of the conversion chip U3 is grounded; and two ends of the capacitor C1 are respectively connected with a first pin and a second pin of the conversion chip.
Preferably, the red light indicating circuit further comprises: a resistor R4, a light emitting diode D2; a pin II of the electrified solenoid K1 is electrically connected with the cathode of the light-emitting diode D2; the anode of the light-emitting diode D2 is electrically connected with one end of the resistor R4; the other end of the resistor R4 is electrically connected with an output pin of the power adapter U4.
Preferably, the protection circuit further comprises a green light indicating circuit; the green light indicating circuit includes: the resistor R1 and the light emitting diode D3; one end of the resistor R1 is connected with a third pin of the conversion chip U3, and the other end of the resistor R1 is connected with the anode of the light emitting diode D3; and the cathode of the light-emitting diode D3 is connected with a No. seven pin of the singlechip chip U1.
Preferably, the first voltage is 12V and the second voltage is 5V.
The beneficial effects of adopting the embodiment are as follows: the utility model provides a pair of scrape trigger motor protection device, permanent magnet of installation above the pivot that links to each other with driving motor, driving motor drives the pivot and rotates, the permanent magnet is followed the pivot and is rotated, when the permanent magnet is close to protection circuit, protection circuit detects the magnetic field through the hall effect, thereby judge driving motor's state, when judging driving motor breaks down, protection circuit can in time control driving motor shut down, accurate discernment driving motor's state, and response speed is fast, do not need touch switch just to realize driving motor's shut down, the phenomenon of maloperation has been avoided appearing, be difficult for breaking down, do not need the operation workman to carry out special operation.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the scraper motor protection device provided by the present invention;
fig. 2 is a schematic structural diagram of an embodiment of a protection circuit provided by the present invention;
fig. 3 is a circuit structure diagram of an embodiment of a control circuit provided by the present invention;
fig. 4 is a circuit diagram of an embodiment of an isolation circuit provided by the present invention;
fig. 5 is a circuit structure diagram of an embodiment of the hall circuit provided by the present invention;
fig. 6 is a circuit diagram of an embodiment of an adapter circuit provided by the present invention;
fig. 7 is a circuit diagram of an embodiment of a conversion circuit provided by the present invention;
fig. 8 is a circuit diagram of an embodiment of a red light indicating circuit provided by the present invention;
fig. 9 is a circuit structure diagram of an embodiment of the green light indicating circuit provided by the present invention.
Detailed Description
The following detailed description of the preferred embodiments of the invention, which is to be read in connection with the accompanying drawings, forms a part of this application, and together with the embodiments of the invention, serve to explain the principles of the invention and not to limit its scope.
In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of the scraper motor protection device provided by the present invention, and a specific embodiment of the present invention discloses a scraper motor protection device, including: a permanent magnet 10, a protection circuit 20, a driving motor 30, and a rotation shaft 40; the driving motor 30 is connected with the rotating shaft 40; the permanent magnet 10 is attracted to the rotating shaft 40; the protection circuit 20 is electrically connected with the driving motor 30 and the rotating shaft 40 respectively;
when the driving motor 30 works, the permanent magnet 10 is driven to rotate by the rotating shaft 40, and a magnetic field signal is provided for the protection circuit 20;
the protection circuit 20 determines the state of the drive motor 30 based on the state of the magnetic field signal, and when the state of the drive motor 30 is abnormal, the protection circuit 20 controls the drive motor 30 to stop.
In the above embodiment, the protection circuit 20 is fixedly installed beside the scraper machine by screws and installed on the same side of the rotating shaft 40 as the permanent magnet 10, but the protection circuit 20 is not installed on the rotating shaft 40, the permanent magnet 10 has extremely strong adsorption force and is adsorbed on the edge of the end face of the rotating shaft 40, so that the adsorption position of the permanent magnet 10 is ensured to be fixed for a long time, and the permanent magnet 10 can resist dust and cannot influence the magnetic force thereof due to the accumulation of dust for an excessively long time. Permanent magnet 10 can be the cylinder, also can be square, the utility model discloses do not further limit to permanent magnet 10's shape, in addition, also do not have specific requirement to permanent magnet 10's size, only require permanent magnet 10 can provide stable strength's magnetic field, the intensity in magnetic field is selected according to actual conditions, the utility model discloses do not further limit to the intensity in the magnetic field that permanent magnet 10 produced yet.
The protection circuit 20 can automatically identify whether the scraper conveyor is started, when the driving motor 30 rotates, the permanent magnet 10 periodically approaches the hall device U2 to generate pulse signals, the single chip microcomputer U1 detects pulse signals with a continuous preset number, such as 10 continuous pulse signals, and when the time interval between two adjacent pulse signals is less than 5s, the scraper conveyor is considered to be started and enters a monitoring state. If the time interval between two adjacent pulse signals is greater than 5s, the driving motor 30 is indicated to be in fault, at the moment, the single chip microcomputer chip U1 sends a control instruction to control the power-on solenoid K1 to be powered on, so that the driving motor 30 is controlled to stop, an alarm is sent out, and the driving motor 30 is protected from being burnt out.
Compared with the prior art, the scraper motor protection device that this embodiment provided, a permanent magnet 10 of installation on the pivot 40 that links to each other with driving motor 30, driving motor 30 drives pivot 40 and rotates, permanent magnet 10 follows pivot 40 and rotates, when permanent magnet 10 is close to protection circuit 20, protection circuit 20 detects the magnetic field through the hall effect, thereby judge driving motor 30's state, when judging that driving motor 30 breaks down, protection circuit 20 can in time control driving motor 30 and stop the operation, accurate discernment driving motor 30's state, and response speed is fast, do not need touch switch just to realize driving motor 30's shut down, the phenomenon of maloperation has been avoided appearing, be difficult for breaking down, do not need the operation workman to carry out special operation.
Referring to fig. 2, fig. 2 is a schematic structural diagram of an embodiment of the protection circuit according to the present invention, in an embodiment of the present invention, the protection circuit includes: the method comprises the following steps: a control circuit 201, a Hall circuit 202, a power supply circuit 203, a red light indicating circuit 204 and an isolating circuit 206; the control circuit 201 is electrically connected with the Hall circuit 202 and the isolation circuit 206 respectively; the power circuit 203 is respectively electrically connected with the red light indicating circuit 204, the control circuit 201 and the Hall circuit 202;
the hall circuit 202 is used for generating a pulse signal according to a magnetic field signal of the permanent magnet 10 on the rotating shaft 40; the control circuit 201 judges the state of the driving motor 30 according to the pulse signal and sends a control instruction to the red light indicating circuit 204; the power circuit 203 is used for supplying power to the scraper motor protection device; the red light indicating circuit 204 is used for stopping the driving motor 30 according to the control instruction; the isolation circuit 206 is used to secure the circuit.
In the above embodiment, the hall circuit 202 detects the change state of the magnetic field signal of the permanent magnet 10 fixed to the rotating shaft 40, converts the change state of the magnetic field signal into a pulse signal by the hall effect, analyzes the pulse signal by the control circuit 201, controls the driving motor 30 according to the analysis result, and sends a control instruction to turn off the driving motor 30 when it is determined that the driving motor 30 has a fault, thereby realizing the automatic detection of the state of the driving motor 30 and playing a role in protecting the driving motor 30 from being burned out.
Please refer to fig. 3, fig. 3 is a circuit structure diagram of an embodiment of the control circuit provided by the present invention, fig. 4 is a circuit structure diagram of an embodiment of the isolation circuit provided by the present invention, in an embodiment of the present invention, the control circuit 201 includes: the connector ISP and the single chip microcomputer chip U1; a first pin of the connector ISP is electrically connected with a second pin of the singlechip chip U1; a pin II of the connector ISP is electrically connected with a pin V of the singlechip chip U1; the pin III of the connector ISP is electrically connected with the pin VI of the singlechip chip U1; the fourth pin of the connector ISP and the fourth pin of the singlechip chip U1 are respectively grounded; the pin II of the singlechip chip U1 is also connected with a second voltage;
the hall circuit 202 includes: a Hall device U2; a second pin of the Hall device U2 is grounded; a third pin of the Hall device U2 is electrically connected with a seventh pin of the singlechip chip U1;
the red light indicating circuit 204 includes: an energized solenoid K1, armatures 1, 3; the armatures 1 and 3 are electrically connected with a driving motor;
the isolated circuit 206 includes: the optical coupler isolator J1 and the resistor R3; a pin I of the optocoupler isolator J1 is electrically connected with a pin III of the singlechip chip U1; a pin II of the optocoupler isolator J1 is electrically connected with one end of a resistor R3; a third pin of the optocoupler isolator J1 is electrically connected with a second pin of the electrified solenoid K1; a fourth pin of the optocoupler isolator J1 is grounded;
the Hall device U2 generates a pulse signal according to the magnetic field signal, and the pulse signal is sent to the single chip U1 from a third pin of the Hall device U2; when the singlechip chip U1 judges that the driving motor is abnormal according to the state of the pulse signal, a control instruction is sent to the optocoupler isolator J1 from a third pin of the singlechip chip U1; the optical coupling isolator J1 sends an electric signal to the electrified solenoid K1 from a third pin of the optical coupling isolator J1 according to a control instruction; the electrified solenoid K1 is electrified according to the electric signal to generate magnetic force to connect the armatures 1 and 3, thereby controlling the driving motor to stop.
In the above embodiment, the connector ISP is an interface for loading a program, the connector ISP is electrically connected to the single chip microcomputer U1, the single chip microcomputer U1 is an STC single chip microcomputer and has 8 pins, and the single chip microcomputer U1 can recognize a pulse signal obtained by converting a change state of a magnetic field signal by a hall circuit through a set program, thereby determining a state of the driving motor 30, and controlling the driving motor 30 and a circuit according to the determined state of the driving motor 30.
The hall device U2 is a magnetic sensor based on hall effect, and can be used for detecting a magnetic field and a change thereof, when the driving motor 30 operates, the permanent magnet 10 attached to the rotating shaft 40 rotates periodically, the hall device U2 generates a changing current according to the change of the magnetic field, and the control circuit 201 determines the state of the driving motor 30 according to the changing current. The permanent magnet 10 is adsorbed at the edge of the end face of the rotating shaft 40, and the position change of the permanent magnet is more obvious relative to the Hall device U2, so that the Hall device U2 can accurately detect the change of the magnetic field signal.
The electrified solenoid K1 is electrified to generate magnetic force, and the armatures 1 and 3 are electrically connected with the driving motor 30 to attract the armatures 1, so that the circuit is tripped, and the driving motor 30 stops working.
The optocoupler isolator J1 transmits an electrical signal by using light as a medium, and generally encapsulates a light emitter (an infrared light emitting diode LED) and a light receiver (a photosensitive semiconductor tube) in the same tube shell. When the input end is electrified, the light emitter emits light, and the light receiver receives the light, then photocurrent is generated and flows out from the output end, thereby realizing 'electro-optic-electro' conversion. The single chip U1 is electrically connected with the energized solenoid K1 through the optical coupling isolator J1, so that the control circuit 201 is isolated from the execution circuit, and the safety of the circuit is guaranteed.
Referring to fig. 5, fig. 5 is a circuit structure diagram of an embodiment of the hall circuit provided by the present invention, in an embodiment of the present invention, the hall circuit further includes: resistors R2, R7; a first pin of the Hall device U2 is electrically connected with one end of the resistor R7, and a third pin of the Hall device U2 is electrically connected with one end of the resistor R2; the other end of the resistors R2 and R7 is connected with a second voltage.
In the above embodiment, the hall device U2 is connected to the second voltage through the resistors R2 and R7, which plays a role of voltage reduction, and avoids burnout caused by direct connection of the hall device U2 to the voltage input.
In an embodiment of the present invention, the power circuit 203 includes: a conversion circuit and an adaptation circuit; the conversion circuit is electrically connected with the adaptation circuit; the adapter circuit is externally connected with a power supply;
the adapter circuit converts the voltage of the external power supply into a first voltage; the conversion circuit converts the first voltage into a second voltage.
In the above embodiment, the power circuit 203 supplies power to the whole protection circuit 20, the power circuit 203 is divided into two parts, namely, a conversion circuit and an adaptation circuit, the adaptation circuit is externally connected with a 220V power supply to provide initial power for the power circuit 203, but because different elements in the circuit have different working voltages, the power supply cannot be directly supplied through the external power supply, the adaptation circuit converts the external power supply voltage into the first voltage, and the conversion circuit converts the first voltage into the second voltage.
Referring to fig. 6, fig. 6 is a circuit structure diagram of an embodiment of an adaptive circuit provided by the present invention, in an embodiment of the present invention, the adaptive circuit includes: a power adapter U4; a first pin and a second pin of the power adapter U4 are input pins, and a third pin is an output pin; an input pin of the power adapter U4 is externally connected with a power supply; an output pin of the power adapter U4 is electrically connected with a first pin of the electrified solenoid K1; pin four of power adapter U4 is connected to ground.
In the above embodiment, the power adapter U4 is a power supply conversion device for small portable electronic devices and electronic appliances, and generally comprises a housing, a power transformer and a rectifying circuit, and can be classified into an ac output type and a dc output type according to the output type.
Referring to fig. 7, fig. 7 is a circuit structure diagram of an embodiment of a conversion circuit provided by the present invention, in an embodiment of the present invention, the conversion circuit includes: a conversion chip U3, and capacitors C1 and C2; a first pin of the conversion chip U3 is electrically connected with a third pin of the power adapter U4; a third pin of the conversion chip U3 is connected with one end of the capacitor C2; a third pin of the conversion chip U3 is electrically connected with the other end of the resistor R3; the other end of the capacitor C2 is grounded; a second pin of the conversion chip U3 is grounded; and two ends of the capacitor C1 are respectively connected with a first pin and a second pin of the conversion chip.
In the above embodiment, the conversion chip U3 is a voltage conversion chip with a model number of HT7335, which can further reduce the 12V voltage output by the conversion circuit, and the power circuit 203 can provide 12V voltage output and 5V voltage output to meet the power supply requirements of different electronic components.
Referring to fig. 8, fig. 8 is a circuit structure diagram of an embodiment of the red light indicating circuit according to the present invention, in an embodiment of the present invention, the red light indicating circuit 204 further includes: a resistor R4, a light emitting diode D2; a pin II of the electrified solenoid K1 is electrically connected with the cathode of the light-emitting diode D2; the anode of the light-emitting diode D2 is electrically connected with one end of the resistor R4; the other end of the resistor R4 is electrically connected with an output pin of the power adapter U4.
In the above embodiment, in order to control the shutdown of the driving motor 30 and visually display the state of the driving motor 30, the protection circuit 20 further includes a red light indicating circuit 204, when it is found that the driving motor 30 is abnormal, the single chip microcomputer chip U1 sends a control instruction to the optical coupler isolator J1, the optical coupler isolator outputs voltage to the energized solenoid K1, so that the energized solenoid K1 is energized to generate magnetic force, because the armatures 1 and 3 are electrically connected with the driving motor 30, the armatures 1 and 3 are attracted, the circuit is tripped, the driving motor 30 stops working, meanwhile, the light emitting diode D2 is turned on, and a red light is sent, so as to display the occurrence of a fault of the driving motor 30 to an operator, and the driving motor can be timely maintained.
Referring to fig. 9, fig. 9 is a circuit structure diagram of an embodiment of the green light indicating circuit provided by the present invention, in the embodiment of the present invention, the protection circuit further includes a green light indicating circuit; the green light indicating circuit includes: a resistor R1 and a light emitting diode D3; one end of the resistor R1 is connected with a third pin of the conversion chip U3, and the other end of the resistor R1 is connected with the anode of the light emitting diode D3; and the cathode of the light-emitting diode D3 is connected with a No. seven pin of the singlechip chip U1.
In the above embodiment, in order to visually display the normal operating state of the driving motor 30, the protection circuit 20 further includes a green light indicating circuit 205, and when the control circuit 201 determines that the driving motor 30 is operating normally, the control circuit provides 5V input voltage for the green light indicating circuit 205, so that the light emitting diode D3 is turned on, and emits a green light to display the normal operation of the driving motor 30 to the operator.
In an embodiment of the present invention, the first voltage is 12V, and the second voltage is 5V.
In the above embodiment, the electronic component needs to operate normally under its rated operating voltage, and when the voltage is too high, the electronic component may be damaged, even the circuit may be burned; when the voltage is too small, the electronic element can not work normally, and the protection circuit can not play a protection effect. The power supply circuit can provide 12V and 5V voltage outputs and can meet the working voltage of most electronic elements.
The utility model provides a pair of scrape trigger motor protection device, permanent magnet of installation above the pivot that links to each other with driving motor, driving motor drives the pivot and rotates, the permanent magnet is followed the pivot and is rotated, when the permanent magnet is close to protection circuit, protection circuit detects the magnetic field through the hall effect, thereby judge driving motor's state, when judging driving motor breaks down, protection circuit can in time control driving motor shut down, accurate discernment driving motor's state, and response speed is fast, do not need touch switch just to realize driving motor's shut down, the phenomenon of maloperation has been avoided appearing, be difficult for breaking down, do not need the operation workman to carry out special operation.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention.
Claims (9)
1. A scraper blade machine motor protection device, characterized by comprising: the permanent magnet, the protection circuit, the driving motor and the rotating shaft; the driving motor is fixedly connected with the rotating shaft; the permanent magnet is adsorbed on the rotating shaft; the protection circuit is electrically connected with the driving motor and the rotating shaft respectively;
when the driving motor works, the permanent magnet is driven to rotate through the rotating shaft, and a magnetic field signal is provided for the protection circuit;
the protection circuit judges the state of the driving motor according to the state of the magnetic field signal, and when the state of the driving motor is abnormal, the protection circuit controls the driving motor to stop;
wherein the protection circuit includes: the method comprises the following steps: the control circuit, the Hall circuit, the power supply circuit, the red light indicating circuit and the isolating circuit; the control circuit is respectively electrically connected with the Hall circuit and the isolation circuit; the power circuit is respectively and electrically connected with the red light indicating circuit, the control circuit and the Hall circuit;
the Hall circuit is used for generating a pulse signal according to a magnetic field signal of the permanent magnet on the rotating shaft; the control circuit judges the state of the driving motor according to the pulse signal and sends a control instruction to the red light indicating circuit; the power circuit is used for supplying power to the scraper motor protection device; the red light indicating circuit is used for stopping the driving motor according to the control instruction; the isolation circuit is used for ensuring the safety of the circuit.
2. The scraper motor protection device of claim 1, characterized in that said control circuit comprises: the connector ISP and the single chip microcomputer chip U1; the first pin of the connector ISP is electrically connected with the second pin of the singlechip chip U1; the second pin of the connector ISP is electrically connected with the fifth pin of the singlechip chip U1; the pin III of the connector ISP is electrically connected with the pin VI of the singlechip chip U1; the pin IV of the connector ISP and the pin IV of the singlechip chip U1 are respectively grounded; the pin II of the single chip U1 is also connected with a second voltage;
the Hall circuit includes: a Hall device U2; a second pin of the Hall device U2 is grounded; a third pin of the Hall device U2 is electrically connected with a seventh pin of the singlechip chip U1;
the red light indicating circuit includes: an energized solenoid K1, armatures 1, 3; the armatures 1 and 3 are electrically connected with the driving motor;
the isolated circuit includes: the optical coupler isolator J1 and the resistor R3; a pin I of the optocoupler isolator J1 is electrically connected with a pin III of the singlechip chip U1; a pin II of the optocoupler isolator J1 is electrically connected with one end of the resistor R3; a pin III of the optocoupler isolator J1 is electrically connected with a pin II of the electrified solenoid K1; a fourth pin of the optocoupler isolator J1 is grounded;
the Hall device U2 generates a pulse signal according to a magnetic field signal, and the pulse signal is sent to the singlechip chip U1 from a third pin of the Hall device U2; when the singlechip chip U1 judges that the driving motor is abnormal according to the state of the pulse signal, a control instruction is sent to the optocoupler isolator J1 from a third pin of the singlechip chip U1; the optical coupling isolator J1 sends an electric signal to the electrified solenoid K1 from a third pin of the optical coupling isolator J1 according to a control instruction; the electrified solenoid K1 is electrified according to the electric signal to generate magnetic force to connect the armatures 1 and 3, so that the driving motor is controlled to stop.
3. The scraper motor protection device of claim 2, wherein said hall circuit further comprises: resistors R2, R7; a first pin of the Hall device U2 is electrically connected with one end of the resistor R7, and a third pin of the Hall device U2 is electrically connected with one end of the resistor R2; the other end of the resistors R2 and R7 is connected with the second voltage.
4. The scraper motor protection device of claim 2, characterized in that said power circuit comprises: a conversion circuit and an adaptation circuit; the conversion circuit is electrically connected with the adaptation circuit; the adapter circuit is externally connected with a power supply;
the adapter circuit converts the voltage of an external power supply into a first voltage; the conversion circuit converts the first voltage into a second voltage.
5. The scraper motor protection device of claim 4, characterized in that said adaptation circuit comprises: a power adapter U4; the first pin and the second pin of the power adapter U4 are input pins, and the third pin is an output pin; an input pin of the power adapter U4 is externally connected with a power supply; an output pin of the power adapter U4 is electrically connected with a first pin of the electrified solenoid K1; and the fourth pin of the power adapter U4 is grounded.
6. The scraper motor protection device of claim 5, characterized in that said switching circuit comprises: a conversion chip U3, and capacitors C1 and C2; the first pin of the conversion chip U3 is electrically connected with the third pin of the power adapter U4; a third pin of the conversion chip U3 is connected with one end of the capacitor C2; a third pin of the conversion chip U3 is electrically connected with the other end of the resistor R3; the other end of the capacitor C2 is grounded; a second pin of the conversion chip U3 is grounded; and two ends of the capacitor C1 are respectively connected with the first pin and the second pin of the conversion chip.
7. The motor protection device of the scraper conveyor as claimed in claim 5, characterized in that said red light indicating circuit further comprises: a resistor R4, a light emitting diode D2; the pin II of the electrified solenoid K1 is electrically connected with the cathode of the light-emitting diode D2; the anode of the light emitting diode D2 is electrically connected with one end of the resistor R4; the other end of the resistor R4 is electrically connected with an output pin of the power adapter U4.
8. The motor protection device of the scraper conveyor as claimed in claim 6, characterized in that said protection circuit further comprises a green light indicating circuit; the green light indicating circuit includes: the resistor R1 and the light emitting diode D3; one end of the resistor R1 is connected with a pin III of the conversion chip U3, and the other end of the resistor R1 is connected with the anode of the light-emitting diode D3; and the cathode of the light-emitting diode D3 is connected with a No. seven pin of the singlechip chip U1.
9. The scraper motor protection device of claim 4, characterized in that said first voltage is 12V and said second voltage is 5V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220568718.0U CN218161784U (en) | 2022-03-11 | 2022-03-11 | Scraper motor protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220568718.0U CN218161784U (en) | 2022-03-11 | 2022-03-11 | Scraper motor protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218161784U true CN218161784U (en) | 2022-12-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220568718.0U Active CN218161784U (en) | 2022-03-11 | 2022-03-11 | Scraper motor protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218161784U (en) |
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- 2022-03-11 CN CN202220568718.0U patent/CN218161784U/en active Active
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