CN108390355B - Explosion-proof type colliery is wave detector in hole pushes away by device automatic protection circuit - Google Patents
Explosion-proof type colliery is wave detector in hole pushes away by device automatic protection circuit Download PDFInfo
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- CN108390355B CN108390355B CN201810198342.7A CN201810198342A CN108390355B CN 108390355 B CN108390355 B CN 108390355B CN 201810198342 A CN201810198342 A CN 201810198342A CN 108390355 B CN108390355 B CN 108390355B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
Abstract
The invention relates to an automatic protection circuit, belongs to the technical field of geophysical exploration, and particularly relates to an automatic protection circuit for a detector pushing device in an explosion-proof coal mine hole. The invention provides a two-stage automatic protection circuit for a borehole wave detector backup device for detecting a coal mine underground tunneling working face, and the two-stage automatic protection circuit can ensure that the borehole wave detector is well coupled in a horizontal drilling hole and the working power of the backup device meets the explosion-proof requirement of the coal mine underground on electrical equipment by limiting the maximum torque of the borehole wave detector backup device, and is simple, reliable and strong in practicability.
Description
Technical Field
The invention relates to an automatic protection circuit, belongs to the technical field of geophysical exploration, and particularly relates to an automatic protection circuit for a detector pushing device in an explosion-proof coal mine hole.
Background
In case of the geological abnormal bodies such as abandoned roadways, goafs, faults, collapse columns and the like in front of the coal mine driving working face, disasters such as gas outburst, water inrush and the like can occur once disturbed by the mining activity, so that major casualties and property loss can be caused, and the geological condition fine exploration of coal mine working face mining is particularly important for ensuring safe and efficient mining of coal mines. Therefore, advanced detection of the underground coal mine heading face becomes essential exploration work in coal mining. However, because the underground tunneling working space is narrow, only one tunneling roadway can be provided with the detection equipment, so that the advanced detection of the tunneling working face cannot be carried out. At present, a wave detector in a horizontal hole is placed by drilling horizontal holes on two sides of a driving roadway, so that the problem that advanced detection cannot be achieved is solved.
The difficulty of development of an explosion-proof type borehole detector is how to well couple the detector with the borehole wall, and a mechanical pushing method is used for firmly coupling the detector with the borehole wall, so that an automatic protection circuit must be provided for a pushing device. Due to the special underground working condition of the coal mine, the sensor has to meet the explosion-proof requirement, the requirement on an automatic protection circuit of the sensor is more strict, and the pushing power of the detector is strictly limited.
At present, borehole geophones are mainly used for petroleum logging, the application of the borehole geophones is mainly used for vertical wells, and the borehole geophones have no power limitation and no explosion-proof limitation. One of the borehole wave detectors in the prior art is to utilize a direct current motor to infinitely push against until the motor is locked, if the rotating speed is 0, the pushing is successful, and a protection circuit adopts a basic voltage comparison circuit method; the other method adopts a digital current control circuit to realize successful pushing and overcurrent protection, adopts the principle of locked-rotor self-locking of a direct current motor, and samples real-time current and reference current through a single chip microcomputer to compare. The voltage comparison and the current comparison do not consider the small power required by the explosion prevention of the coal mine, and the requirements of the detection environment of the underground coal mine tunneling working face are not met; and only a primary protection circuit is provided, so that the requirements of complex environments under the coal mine on electrical equipment cannot be met.
Disclosure of Invention
The invention mainly solves the technical problems in the prior art and provides an automatic protection circuit for a wave detector pushing device in an explosion-proof coal mine hole. The circuit realizes protection by limiting the working current of the backup device to limit the maximum torque of the backup device of the in-hole wave detector, can ensure that the in-hole wave detector is well coupled in a horizontal drilling hole, and can ensure that the working power of the backup device is within the explosion-proof requirement range of the underground coal mine on electrical equipment.
The technical problem of the invention is mainly solved by the following technical scheme:
an explosion-proof coal mine in-hole wave detector pushing device automatic protection circuit comprises:
the first-stage protection circuit specifically comprises:
the 12V power supply module circuit is used for providing a stable voltage value for the current and voltage control circuit;
a two-stage current-voltage control circuit for controlling an output voltage and an output current in the push device to a predetermined range;
the second-stage protection circuit specifically comprises:
the comparator circuit is used for outputting a low-level signal when the sampling voltage obtained by the motor current through the sampling resistor is greater than a preset reference voltage;
and the switching circuit is a triode device, the base electrode of the switching circuit is connected with the output end of the comparator, the collector electrode of the switching circuit is connected with the relay module, and when the comparator outputs a low-level signal, the switching circuit is switched on to control the relay module to work and cut off the pushing work circuit.
Preferably, the above automatic protection circuit for an explosion-proof coal mine borehole detector pushing device comprises a 12V power supply circuit module, and the 12V power supply circuit module includes:
a voltage output end VOUT of the power supply module U1 is connected with the anode of the polar capacitor C2, the cathode of the capacitor C4, the cathode of the voltage stabilizing diode D3 and the cathode of the voltage stabilizing diode D4, and a voltage reference end of the power supply module U1 is connected with the cathode of the polar capacitor C2, the anode of the capacitor C4, the anode of the voltage stabilizing diode D3 and the anode of the voltage stabilizing diode D4; the input terminal Vin is connected to the positive electrode of the polar capacitor C3, and the ground terminal GND is connected to the negative electrode of the polar capacitor C3 and grounded.
Preferably, the anti-explosion coal mine borehole detector pushing device automatic protection circuit comprises:
an input end of the overvoltage and overcurrent protector U2 is connected with a capacitor C6, a resistor R4, a resistor R5 and a resistor R6, an undervoltage protection value locking port UVLO is connected with one end of the resistor R6 and one end of the resistor R11, an overvoltage protection value locking port OVLO is connected with one end of the resistor R5 and one end of the resistor R10, a port is arranged to be connected with the resistor R12, and a grounding end of the overvoltage and overcurrent protector U2 is connected with the capacitor C6, the resistor R9, the resistor R10, the resistor R11 and the resistor R12; an enable port EN and a reverse current control input end RIEN are connected with the common ends of the resistor R4 and the resistor R9 and connected with the corresponding ports of the overvoltage and overcurrent protector U3; the high voltage input end HVEN is grounded;
an input end of the overvoltage and overcurrent protector U3 is connected with a capacitor C1, a resistor R7 and a resistor R8, an undervoltage protection value locking port UVLO of the overvoltage and overcurrent protector U3 is connected with a common end of the resistor R8 and the resistor R14, an overvoltage protection value locking port OVLO of the overvoltage and overcurrent protector U15 is connected with a common end of the resistor R7 and the resistor R13, a port of the overvoltage and overcurrent protector U15 is arranged, and a grounding end of the overvoltage and overcurrent protector U1 is connected with a capacitor C539; the high voltage input end of the high voltage input end is grounded; the output terminal OUT thereof is grounded through a capacitor C5.
Preferably, the explosion-proof coal mine borehole detector pushing device automatic protection circuit comprises:
the voltage division circuit comprises a resistor R47, a slide rheostat R48 and a resistor R49 which are connected in series;
the reference input end of the comparator module U7B is connected with the slide rheostat R48, and the output end of the comparator module U7B is connected with a 5V power supply through a resistor R50; the comparison input end of the resistor is connected with a sampling resistor R3, and the sampling resistor is used for converting the current generated by the motor of the push device into a push voltage Vt.
Preferably, the explosion-proof coal mine borehole detector pushing device automatic protection circuit comprises:
a triode Q8 and a resistor R43; the base electrode of the triode Q8 is connected with the output end of the comparator module U7B through a resistor R43, the collector electrode of the triode Q8 is grounded, and the emitter electrode of the triode Q8 is connected with a subsequent circuit; when the output of the comparator U7B is at a low level, the emitter and the collector of the triode are conducted, and the voltage of the emitter is at a low level, so that working voltage is provided for a subsequent relay circuit.
Preferably, the above-mentioned explosion-proof coal mine borehole detector pushing device automatic protection circuit, the relay module includes:
a capacitor C19, a diode D14, a relay module B1; the relay module B1 is connected with the switch circuit through the parallel circuit of the capacitor C19 and the diode D14, one end of the capacitor C19 is connected with 5V voltage, the other end of the capacitor C19 is connected with the emitting electrode of the triode Q8, when the Q8 is conducted and the emitting electrode is at a low level, working voltage is provided for the relay, the relay module works, the electromagnet is electrified, the relay is attracted, and the current of the pushing device is cut off to start.
Therefore, the invention has the following advantages: the invention provides a two-stage automatic protection circuit for a borehole wave detector backup device for detecting a coal mine underground tunneling working face, and the two-stage automatic protection circuit can ensure that the borehole wave detector is well coupled in a horizontal drilling hole and the working power of the backup device meets the explosion-proof requirement of the coal mine underground on electrical equipment by limiting the maximum torque of the borehole wave detector backup device, and is simple, reliable and strong in practicability.
Drawings
FIG. 1 is a first stage protection circuit diagram of an automatic protection circuit of a detector pushing device in an explosion-proof coal mine hole;
FIG. 2 is a second-stage protection circuit diagram of an automatic protection circuit of a wave detector pushing device in an explosion-proof coal mine hole.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
Example (b):
the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
An automatic protection circuit of a backup device of a wave detector in an explosion-proof coal mine hole comprises a 12V power supply module circuit, a two-stage current and voltage control circuit, a comparator circuit, a switch circuit, a sampling resistor circuit and a relay circuit. The 12V power supply module circuit and the two-stage current and voltage control circuit are first-stage protection circuits, and the comparator circuit, the switch circuit, the sampling resistor circuit and the relay circuit form a second-stage protection circuit. The first stage of protection circuit: the 12V power supply module circuit is mainly used for providing a stable voltage value for the current-voltage control circuit; the two-stage voltage and current control circuit adopts an integrated chip as a protection circuit to control the voltage output range to be 10V-13V and the output current to be limited to 300mA, when the current of the motor in the pushing device reaches the value, the current is kept at the value and cannot be continuously increased, and the pushing motor is effectively protected from being damaged. The second-stage protection circuit: one end of the comparator is connected with a sampling voltage obtained by the current of the motor through the sampling resistor, the other end of the comparator is connected with a preset reference voltage (the voltage when the current of the pushing device is 400 mA), and when the sampling voltage is greater than the reference voltage, the output end of the comparator is at a low level; the switching circuit adopts a triode, the output end of the comparator is connected with the base level of the triode, and when the output of the comparator circuit is low level, the triode is conducted; and when the switching circuit is switched on, the relay module starts to work, the electromagnet is electrified, attracts the armature and cuts off the pushing working circuit, so that the secondary protection effect is achieved.
Referring to figure 1: a first-stage protection circuit of an automatic protection circuit of a wave detector pushing device in an explosion-proof coal mine hole comprises a 12V power supply module circuit 1 and a two-stage current and voltage control circuit 2. The 12V power supply circuit module circuit 1 in the first-stage protection circuit comprises a current-limiting voltage module WRF0512-6W power supply module U1, a polar capacitor C2, a polar capacitor C3, a capacitor C4, a voltage-stabilizing diode D3 and a voltage-stabilizing diode D4; the positive pole of the polar capacitor C2 is connected with 14 pins of the power module, the negative pole is connected with 16 pins of the power module, the positive pole of the polar capacitor C3 is connected with 22 and 23 pins of the power module, the negative pole is connected with 2 and 3 pins of the power module, one end of the capacitor C4 is connected with 14 pins of the power module, one end of the capacitor C4 is connected with 16 pins of the power module, the voltage stabilizing diodes D3 and D4 are connected in parallel, the positive pole is connected with 16 pins of the power module, and the negative pole is connected with 14 pins of the power.
The two-stage current and voltage control circuit 2 in the first-stage protection circuit comprises a MAX14573 integrated chip U2, a MAX14573 integrated chip U3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a capacitor C1, a capacitor C5 and a capacitor C6; wherein the voltage dividing circuit composed of R4 and R9 provides effective voltage for the enabling ends of U2 and U3, R6 and R11 are the same as R8 and R14, and determine the undervoltage protection value (V)UVLO) R5, R10 are identical to R7, R113, and the overvoltage protection value (V) is determinedOVLO) R12, R15 determine the restriction value (I), respectivelyLIM) The capacitor C1, the capacitor C5, and the capacitor C6 restrict stable operation during the input voltage drop maintenance period when a transient short circuit occurs.
The control circuits of U1 and U2 are the same, and the resistance value of each resistor can be determined according to formula (1-1), formula (1-2) and formula (1-3). Taking the U1 stage as an example, the approach is achieved by limiting the in-hole wave detectorMaximum torque of the device, V can be determinedOVLO、VUVLOThe voltage range is 10V-13V, ILIMThe maximum value is 300mA, and the resistance values of R5, R6, R10, R11 and R12 can be determined.
Referring to fig. 2: a second-stage protection circuit of an automatic protection circuit of a coal explosion-proof coal mine borehole wave detector pushing device comprises a comparator circuit 3, a switch circuit 4, a sampling resistor 5 circuit and a relay circuit 6.
The comparator circuit 3 comprises an LM393D comparator module U7B, a resistor R3, a resistor R47, a resistor R48, a resistor R49 and a resistor R50; a pin 6 of a comparator module U7B is connected with a sampling resistor R3, a pin 5 is connected with a potentiometer R48, wherein the resistors R47, R48 and R49 form a voltage division circuit, a power-off reference voltage Vd can be set by adjusting R48, the sampling resistor R3 converts current generated by a pushing device motor into pushing voltage Vt, the size of the reference voltage Vd is preset to be voltage for generating 400mA current by the pushing device motor, the reference voltage Vd and the pushing voltage Vt are used for comparison, when the current generated in the working process of the pushing device is larger than 400mA, the comparator is turned over, a pin 7 at the output end of the comparator module U7B is in a low level, and a triode connected at the rear end is conducted. The resistor R50 is connected between the high level 5v and the output end pin 7 of the comparator, and provides a high level for the normal working circuit of the pushing device, so that the triode can not be conducted, and the protection circuit does not work under the normal state.
The switch circuit 4 comprises a triode Q8 and a resistor R43; the base electrode of the triode Q8 is connected with the output end of the comparator module U7B through a resistor R43, the collector electrode of the triode Q8 is grounded, and the emitter electrode of the triode Q8 is connected with a subsequent circuit; when the output of the comparator U7B is at a low level, the collector and the emitter of the triode are conducted, and the voltage of the emitter is at a low level, so that working voltage is provided for a subsequent relay circuit.
The sampling resistor circuit 5 comprises a sampling resistor R3, one end of the sampling resistor R3 is grounded, and the other end of the sampling resistor R3 is connected with a pin of the comparator module 6. The relay circuit 6 comprises a capacitor C19, a diode D14 and a relay module B1; the relay module B1 is connected with the switch circuit through the parallel circuit of the capacitor C19 and the diode D14, one end of the capacitor C19 is connected with 5V voltage, the other end of the capacitor C19 is connected with the emitting electrode of the triode Q8, when the conduction source of the Q8 is low level, working voltage is provided for the relay, the relay module works, the electromagnet is electrified, the relay is attracted, the current of the pushing device is cut off and started, and therefore second-level protection is achieved.
The pushing automatic protection circuit is simple and reliable in circuit from the viewpoint of limiting the maximum torque of the pushing device, realizes a two-stage automatic protection circuit, can ensure that a wave detector in a hole is well coupled in a horizontal drilling hole, and can ensure the explosion-proof requirement of the working power of the pushing device on electrical equipment in a special environment of underground coal mines.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (4)
1. An explosion-proof coal mine in-hole wave detector pushing device automatic protection circuit is characterized by comprising:
the first-stage protection circuit specifically comprises:
the 12V power supply module circuit is used for providing a stable voltage value for the current and voltage control circuit;
a two-stage current-voltage control circuit for controlling an output voltage and an output current in the push device to a predetermined range;
the second-stage protection circuit specifically comprises:
the comparator circuit is used for outputting a low-level signal when the sampling voltage obtained by the motor current through the sampling resistor R3 is greater than a preset reference voltage;
the switch circuit is a triode device, the base electrode of the switch circuit is connected with the output end of the comparator, the collector electrode of the switch circuit is connected with the relay module, and when the comparator outputs a low-level signal, the switch circuit is switched on to control the relay module to work and cut off the pushing work circuit;
the comparator circuit includes:
the voltage division circuit comprises a resistor R47, a slide rheostat R48 and a resistor R49 which are connected in series;
the reference input end of the comparator module U7B is connected with the slide rheostat R48, and the output end of the comparator module U7B is connected with a 5V power supply through a resistor R50; the comparison input end of the sampling resistor is connected with a sampling resistor R3, and the sampling resistor R3 is used for converting the current generated by the motor of the push device into a push voltage Vt;
the two-stage current-voltage control circuit includes:
an input end of the overvoltage and overcurrent protector U2 is connected with a capacitor C6, a resistor R4, a resistor R5 and a resistor R6, an undervoltage protection value locking port UVLO is connected with one end of the resistor R6 and one end of the resistor R11, an overvoltage protection value locking port OVLO is connected with one end of the resistor R5 and one end of the resistor R10, a port is arranged to be connected with the resistor R12, and a grounding end of the overvoltage and overcurrent protector U2 is connected with the capacitor C6, the resistor R9, the resistor R10, the resistor R11 and the resistor R12; an enable port EN and a reverse current control input end RIEN are connected with the common ends of the resistor R4 and the resistor R9 and connected with the corresponding ports of the overvoltage and overcurrent protector U3; the high voltage input end HVEN is grounded;
an input end of the overvoltage and overcurrent protector U3 is connected with a capacitor C1, a resistor R7 and a resistor R8, an undervoltage protection value locking port UVLO of the overvoltage and overcurrent protector U3 is connected with a common end of the resistor R8 and the resistor R14, an overvoltage protection value locking port OVLO of the overvoltage and overcurrent protector U15 is connected with a common end of the resistor R7 and the resistor R13, a port of the overvoltage and overcurrent protector U15 is arranged, and a grounding end of the overvoltage and overcurrent protector U1 is connected with a capacitor C539; the high voltage input end of the high voltage input end is grounded; the output terminal OUT thereof is grounded through a capacitor C5.
2. The automatic protection circuit for the Pushing device of the explosion-proof coal mine borehole detector according to claim 1, wherein the 12V power supply module circuit comprises:
a voltage output end VOUT of the power supply module U1 is connected with the anode of the polar capacitor C2, the cathode of the capacitor C4, the cathode of the voltage stabilizing diode D3 and the cathode of the voltage stabilizing diode D4, and a voltage reference end of the power supply module U1 is connected with the cathode of the polar capacitor C2, the anode of the capacitor C4, the anode of the voltage stabilizing diode D3 and the anode of the voltage stabilizing diode D4; the input terminal Vin is connected to the positive electrode of the polar capacitor C3, and the ground terminal GND is connected to the negative electrode of the polar capacitor C3 and grounded.
3. The automatic protection circuit for an explosion-proof coal mine borehole detector pushing device according to claim 1, wherein the switching circuit comprises:
a triode Q8 and a resistor R43; the base electrode of the triode Q8 is connected with the output end of the comparator module U7B through a resistor R43, the collector electrode of the triode Q8 is grounded, and the emitter electrode of the triode Q8 is connected with a subsequent circuit; when the output of the comparator U7B is at a low level, the emitter and the collector of the triode are conducted, and the voltage of the emitter is at a low level, so that working voltage is provided for a subsequent relay circuit.
4. The automatic protection circuit for the explosion-proof coal mine borehole geophone pusher according to claim 1, characterized in that the relay module comprises:
a capacitor C19, a diode D14, a relay module B1; the relay module B1 is connected with the switch circuit through the parallel circuit of the capacitor C19 and the diode D14, one end of the capacitor C19 is connected with 5V voltage, the other end of the capacitor C19 is connected with the emitting electrode of the triode Q8, when the Q8 is conducted and the emitting electrode is at a low level, working voltage is provided for the relay, the relay module works, the electromagnet is electrified, the relay is attracted, and the current of the pushing device is cut off to start.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810198342.7A CN108390355B (en) | 2018-03-12 | 2018-03-12 | Explosion-proof type colliery is wave detector in hole pushes away by device automatic protection circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810198342.7A CN108390355B (en) | 2018-03-12 | 2018-03-12 | Explosion-proof type colliery is wave detector in hole pushes away by device automatic protection circuit |
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| CN108390355B true CN108390355B (en) | 2020-02-07 |
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| CN109861507A (en) * | 2018-12-21 | 2019-06-07 | 成都信息工程大学 | A kind of dual power supply conversion method, circuit and power protection method and circuit |
| CN111525161A (en) * | 2020-04-10 | 2020-08-11 | 荷氢新能源科技(山东)有限公司 | Fuel cell capable of automatically controlling hydrogen amount |
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| CN201188584Y (en) * | 2008-05-05 | 2009-01-28 | 煤炭科学研究总院重庆研究院 | Large-capacity essential safety power supply for coal mine |
| CN101447738B (en) * | 2008-12-29 | 2012-05-02 | 重庆航天工业公司 | Flameproof intrinsically safe power supply device |
| CN102081240B (en) * | 2010-12-21 | 2012-07-04 | 浙江大学 | Polarization state control system in high-speed optical fiber communication based on polarization detection module |
| CN102510043B (en) * | 2011-11-23 | 2014-05-14 | 山西科达自控股份有限公司 | Safe secondary protection circuit of mine power supply |
| CN202471175U (en) * | 2012-02-28 | 2012-10-03 | 天地（常州）自动化股份有限公司 | Coal pile sensor |
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