CN210518109U - Mining intrinsic safety power module - Google Patents
Mining intrinsic safety power module Download PDFInfo
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- CN210518109U CN210518109U CN201921878343.2U CN201921878343U CN210518109U CN 210518109 U CN210518109 U CN 210518109U CN 201921878343 U CN201921878343 U CN 201921878343U CN 210518109 U CN210518109 U CN 210518109U
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- 238000005065 mining Methods 0.000 title claims abstract description 13
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 21
- 239000003381 stabilizer Substances 0.000 claims description 28
- 230000001012 protector Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 abstract description 7
- 238000013461 design Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 11
- 239000003990 capacitor Substances 0.000 description 9
- 239000007789 gas Substances 0.000 description 5
- 230000009977 dual effect Effects 0.000 description 4
- 230000005669 field effect Effects 0.000 description 4
- 239000003245 coal Substances 0.000 description 3
- 239000002360 explosive Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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Abstract
The utility model discloses a mining ann power module mainly solves current ann power module load output efficiency low, the poor stability's problem. The power supply module comprises an input voltage stabilizing circuit, a switching power supply circuit connected with the input voltage stabilizing circuit, a double overvoltage and overcurrent protection circuit, a short-circuit protection circuit and a circuit breaker which are connected with the switching power supply circuit, a feedback circuit connected with the double overvoltage and overcurrent protection circuit, the short-circuit protection circuit and the circuit breaker, an alarm circuit connected with the feedback circuit and a direct-current voltage stabilizing output circuit connected with the double overvoltage and overcurrent protection circuit. Through the design, the utility model discloses can monitor this ampere of output start-up process and load break-make change state, reach the accurate control to this ampere of power, improve this ampere of circuit's area load ability greatly, promote this ampere of power module's load output efficiency. Therefore, the method has high use value and popularization value.
Description
Technical Field
The utility model belongs to the technical field of the safety in production technique and specifically relates to a mining ann's power module is related to.
Background
The underground working environment of the mine is special, accidents are easy to happen particularly, personal safety is caused, and the requirement on a power supply is particularly high. The high-speed development of coal mine automation enables the intrinsically safe power supply to be used more and more frequently in a mine, and meanwhile, the use requirement of the intrinsically safe power supply is more and more strict. In the working environment of mines and the like with inflammable and explosive gases, the intrinsic safety power supply is an indispensable safety device. Generally, explosive gas such as gas exists in a mine, and the intrinsic safety power supply needs to fully consider the voltage, current and power conditions in a circuit in the design process and perform protection work to prevent a spark generated by overvoltage or overcurrent from igniting the gas in the mine, so that equipment and personnel are damaged and casualty is caused.
Intrinsically safe power supplies, i.e., intrinsically safe power supplies, intrinsically safe circuits, are circuits that, under normal operation and prescribed fault conditions, cannot ignite a prescribed explosive gas environment with any electrical spark or any thermal effect produced.
Along with the improvement of the mechanization and automation degree of coal mines in China, data acquisition and control systems taking intelligent instruments as cores are increasingly selected by coal mines. The load of the mining intrinsic safety power supply is larger and larger, so that higher requirements are put forward on the intrinsic safety power supply module.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a mining ann power module mainly solves the problem that current ann power module load output efficiency is low, poor stability.
In order to achieve the above object, the utility model adopts the following technical scheme:
a mining intrinsic safety power supply module comprises an input voltage stabilizing circuit, a switching power supply circuit connected with the input voltage stabilizing circuit, a double overvoltage and overcurrent protection circuit, a short-circuit protection circuit and a circuit breaking protector connected with the switching power supply circuit, a feedback circuit connected with the double overvoltage and overcurrent protection circuit, the short-circuit protection circuit and the circuit breaking protector, an alarm circuit connected with the feedback circuit and a direct current voltage stabilizing output circuit connected with the double overvoltage and overcurrent protection circuit;
the direct-current voltage-stabilizing output circuit comprises a voltage-reducing selection circuit connected with the output end of the double overvoltage and overcurrent protection circuit, a low-voltage-reducing voltage stabilizer connected with the voltage-reducing selection circuit, and a fine-tuning voltage-stabilizing circuit connected with the low-voltage-reducing voltage stabilizer.
Furthermore, the step-down selection circuit comprises a voltage comparator connected with the output end of the double overvoltage and overcurrent protection circuit, an output control switch connected with the voltage comparator, and a pre-step-down voltage stabilizer connected with the output control switch; and the control switch and the output end of the pre-step-down voltage stabilizer are connected with the low-step-down voltage stabilizer.
Furthermore, the fine tuning voltage stabilizing circuit comprises a low-resistance parallel rectifier resistor string connected with the output end of the low-voltage drop voltage stabilizer, a rheostat of which the first end and the contact end are connected with the output end of the low-resistance parallel rectifier resistor string, and a fixed resistor connected with the other end of the rheostat; the other end of the fixed resistor is externally connected with the output end of the power supply module.
Furthermore, the switch power supply circuit comprises a rectification filter circuit connected with the input voltage stabilizing circuit, a switch power supply chip connected with the rectification filter circuit, and a high-frequency transformer connected with the switch power supply chip; and the high-frequency transformer is connected with the double overvoltage and overcurrent protection circuit.
Furthermore, the pre-step-down voltage stabilizer is a three-terminal integrated voltage stabilizer, the input end of the pre-step-down voltage stabilizer receives the output end of the output control switch, the output end of the pre-step-down voltage stabilizer is connected with the input end of the low-step-down voltage stabilizer, and the grounding end of the pre-step-down voltage stabilizer is grounded.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the utility model discloses a set up dual excessive pressure overcurrent protection circuit, short-circuit protection circuit, protector that opens circuit, constantly monitor this ampere of power supply circuit to combine feedback circuit and switching power supply circuit, can monitor this ampere of output start-up process and load break-make change state, reach the accurate control to this ampere of power, improved the area load ability of this ampere of circuit greatly, promote this ampere of power module's load output efficiency.
(2) The utility model discloses rely on switching power supply chip intelligent control, this ampere of output starting process of monitoring and load break-make change state judge the operating condition of MOSFET pipe indirectly, avoid its work in the semi-conductive state, prevent that the generating heat that probably appears from sending out the boiling hot to save the great fin of general MOSFET pipe, reduced the circuit board space, it is small, the low power dissipation.
(3) The utility model discloses all set up different forms's voltage stabilizing circuit at power input/output end, ensured that voltage input/output all keeps in normal range, avoids producing excessive pressure impact, improvement circuit's overall stability to power supply circuit and load.
Drawings
Fig. 1 is a schematic block diagram of the overall structure of the present invention.
Fig. 2 is a schematic block diagram of the dc voltage-stabilizing output circuit of the present invention.
Fig. 3 is a schematic diagram of an input voltage stabilizing circuit according to the present invention.
Fig. 4 is a schematic diagram of the rectification filter circuit of the present invention.
Fig. 5 is a schematic diagram of the short-circuit protection circuit of the present invention.
Fig. 6 is a schematic diagram of the dual overvoltage and overcurrent protection circuit of the present invention.
Fig. 7 is a schematic diagram of a feedback circuit according to the present invention.
Fig. 8 is a schematic diagram of the alarm circuit of the present invention.
Detailed Description
The present invention will be further described with reference to the following description and examples, which include but are not limited to the following examples.
Examples
As shown in fig. 1-8, the utility model discloses a mining intrinsic safety power module, including input voltage stabilizing circuit, the switching power supply circuit who links to each other with input voltage stabilizing circuit, the double overvoltage overcurrent protection circuit who links to each other with switching power supply circuit, short-circuit protection circuit, the protector that opens circuit, the feedback circuit who all links to each other with double overvoltage overcurrent protection circuit, short-circuit protection circuit, protector that opens circuit, the alarm circuit who links to each other with feedback circuit, and the direct current steady voltage output circuit who links to each other with double overvoltage overcurrent protection circuit; the circuit breaking protector is a DZ25 series plastic shell type circuit breaker.
The direct-current voltage-stabilizing output circuit comprises a voltage-reducing selection circuit connected with the output end of the double overvoltage and overcurrent protection circuit, a low-voltage-reducing voltage stabilizer connected with the voltage-reducing selection circuit, and a fine-tuning voltage-stabilizing circuit connected with the low-voltage-reducing voltage stabilizer.
As shown in fig. 3, in the input voltage stabilizing circuit adopted in this embodiment, the input voltage is stabilized by the regulating tube T1, the input voltage is sampled by the sampling resistor R3, and the sampled voltage of the input voltage is compared with the reference voltage and then amplified, so as to improve the voltage stabilizing performance of the circuit.
As shown in fig. 4, in the smoothing and rectifying circuit used in this embodiment, the input terminal Vin is connected to both ends of the resistor R5 of the input voltage stabilizing circuit, and the input power supply after voltage stabilization is smoothed and rectified.
Fig. 5 shows a short-circuit protection circuit adopted in this embodiment, first, a diode D2 introduces a current signal inputted to an inverter and changes the current signal into I through a current transformeriThe capacitor C4 is charged, generating an input voltage signal, i.e., the potential of the positive input of operational amplifier a 2. The negative input terminal of the operational amplifier A2 divides the constant voltage source VDD through the resistor R6 and the resistor R9 to obtain a reference voltage VREF。
When the input voltage signal is greater than the reference voltage, the potential of the comparison voltage output by the output terminal of the operational amplifier a2 is in a high state, the high-state comparison voltage can make the emitter and the collector of the feedback transistor T3 conduct, the conducted feedback transistor T3 can provide a first feedback current, and the capacitor C4 is charged through the resistor R8; on one hand, the voltage generated by the second feedback current is divided by the resistor R11 and the resistor R12, and if the voltage shared by the resistor R12, namely the control signal is greater than the critical voltage for conducting the gate and the source of the field effect transistor Q1, the drain and the source of the field effect transistor Q1 are conducted, so that the voltage output V0 is quickly cut off, and short-circuit protection is implemented; on the other hand, when the emitter and the base of the feedback triode T3 are turned on, the second feedback current charges the capacitor C5 through the resistor R11, so that the feedback triode T3 enters a linear working region from a saturation working region, and further, the first feedback current flowing through the resistor R8 is gradually reduced, and finally, the input voltage signal of the positive input end of the operational amplifier a2 is lower than the reference voltage of the negative input end, so that the operational amplifier a2 does not output any more, that is, the output end is zero voltage, the capacitor C5 discharges to the ground end through the diode D3 and the resistor R10, when the capacitor voltage of the capacitor C5 discharges to be lower than the critical voltage of the on state of the field effect transistor Q1, the field effect transistor Q1 is turned off, and the power output returns to normal operation; when the input current signal exceeds the protection point again, the short-circuit protection device is restarted.
Fig. 6 shows a dual over-voltage and over-current protection circuit used in this embodiment, in which the two-stage over-voltage and over-current protection circuit is mainly implemented by controlling the on/off of a transistor. The protection principle of the primary overvoltage and overcurrent protection circuit is as follows: the direct current power supply input through the high-frequency transformer firstly passes through two parallel branches, firstly, a load voltage division circuit formed by connecting two 490-ohm resistors R13 and R14 in parallel is connected to an emitter of a transistor Q2, and the voltage obtained through the voltage division branch is smaller than the input direct current power supply; secondly, a circuit formed by connecting two diodes D3 and D4 of IN4007 (the maximum rectified current is 1A) IN series is connected to the base electrode of a transistor Q2, and because the diodes are IN one-way conductivity, the input direct current power supply is far greater than the starting and conducting voltage of the diodes, the two diodes are conducted at the moment, and the voltage of the branch passing through the two diodes basically has no change. At this time, it can be determined that the transistor Q1 is in the amplifying state according to the potentials at the respective points. The branch passing through the two diodes passes through a 1 kiloohm voltage-dividing load resistor R17 downwards and then is connected to the collector of the transistor Q4, the other branch connected from the input direct current power supply is connected to the base of the transistor Q4 through a series circuit consisting of two voltage-dividing resistors, namely 1 kiloohm R19 and 490 ohm R20, the emitter of the transistor Q4 is grounded, and the potential is 0. At this time, Q4 is in an amplified state. One end led out from R19 is connected to the collector of transistor Q6, the emitter of Q6 is grounded, Q6 is conducted in delay due to the function of 47uf capacitor C6, when the circuit is powered on, the capacitor is charged first, and after C6 is charged, Q6 is conducted. When the circuit breaks down and is powered off, the capacitor discharges to provide power for the circuit, and the power-off protection function can be realized. The input DC power supply is connected to a branch circuit which is connected to the base electrode of a transistor Q8 through a 10 kilo-ohm load resistor R27, the R23 connected to the base electrode of Q6 is divided into two circuits, one circuit is connected to a 12V voltage-stabilizing tube, the other branch circuit is connected to the collector electrode of the transistor Q8, and the potential of the emitter electrode of the transistor Q8 can be accurately calculated according to a circuit diagram. The other end of the serial voltage division R30 consisting of two voltage division resistors 470 ohm R29 and 2.4 kilo ohm R30 is directly grounded, and Q8 also meets the condition of being in an amplifying state according to the voltage division principle.
The protection principle of the primary overvoltage and overcurrent protection circuit and the protection principle of the secondary overvoltage and overcurrent protection circuit are similar to those of the primary overvoltage and overcurrent protection circuit and the secondary overvoltage and overcurrent protection circuit. Only the input voltage becomes a direct current voltage passing through the primary overvoltage and overcurrent protection circuit.
Fig. 7 is a schematic diagram of a feedback circuit used in this embodiment, and fig. 8 is a schematic diagram of an alarm circuit used in this embodiment. The current signal fed back by the feedback circuit enters the alarm circuit, and the alarm circuit gives a fault alarm according to the current signal.
The step-down selection circuit comprises a voltage comparator connected with the output end of the double overvoltage and overcurrent protection circuit, an output control switch connected with the voltage comparator, and a pre-step-down voltage stabilizer connected with the output control switch; and the control switch and the output end of the pre-step-down voltage stabilizer are connected with the low-step-down voltage stabilizer.
The fine tuning voltage stabilizing circuit comprises a low-resistance parallel rectification resistor string connected with the output end of the low-voltage drop voltage stabilizer, a rheostat of which the first end and the contact end are connected with the output end of the low-resistance parallel rectification resistor string, and a fixed resistor connected with the other end of the rheostat; the other end of the fixed resistor is externally connected with the output end of the power supply module.
The switching power supply circuit comprises a rectification filter circuit, a switching power supply chip and a high-frequency transformer, wherein the rectification filter circuit is connected with the input voltage stabilizing circuit, the switching power supply chip is connected with the rectification filter circuit, and the high-frequency transformer is connected with the switching power supply chip; and the high-frequency transformer is connected with the double overvoltage and overcurrent protection circuit. Wherein, LM22670 is selected as the switching power supply chip.
The pre-step-down voltage stabilizer is a three-terminal integrated voltage stabilizer, the input end of the pre-step-down voltage stabilizer receives the output end of the output control switch, the output end of the pre-step-down voltage stabilizer is connected with the input end of the low-step-down voltage stabilizer, and the grounding end of the pre-step-down voltage stabilizer is grounded.
Through the design, the utility model discloses utilize dual excessive pressure overcurrent protection circuit, short-circuit protection circuit, protector that opens circuit, monitor this ampere of power supply circuit constantly to combine feedback circuit and switching power supply circuit, can monitor this ampere of output start-up process and load break-make change state, reach the accurate control to this ampere of power, improved the area load capacity of this ampere of circuit greatly, promote this ampere of power module's load output efficiency. Therefore, the method has high use value and popularization value.
The above embodiment is only one of the preferred embodiments of the present invention, and should not be used to limit the protection scope of the present invention, but all the insubstantial changes or modifications made in the spirit and the idea of the main design of the present invention, the technical problems solved by the embodiment are still consistent with the present invention, and all should be included in the protection scope of the present invention.
Claims (5)
1. The mining intrinsic safety power supply module is characterized by comprising an input voltage stabilizing circuit, a switching power supply circuit connected with the input voltage stabilizing circuit, a double overvoltage and overcurrent protection circuit, a short-circuit protection circuit and a circuit breaking protector which are connected with the switching power supply circuit, a feedback circuit connected with the double overvoltage and overcurrent protection circuit, the short-circuit protection circuit and the circuit breaking protector, an alarm circuit connected with the feedback circuit and a direct-current voltage stabilizing output circuit connected with the double overvoltage and overcurrent protection circuit;
the direct-current voltage-stabilizing output circuit comprises a voltage-reducing selection circuit connected with the output end of the double overvoltage and overcurrent protection circuit, a low-voltage-reducing voltage stabilizer connected with the voltage-reducing selection circuit, and a fine-tuning voltage-stabilizing circuit connected with the low-voltage-reducing voltage stabilizer.
2. The mining intrinsically safe power supply module of claim 1, wherein the step-down selection circuit comprises a voltage comparator connected with an output end of the double overvoltage and overcurrent protection circuit, an output control switch connected with the voltage comparator, and a pre-step-down voltage regulator connected with the output control switch; and the control switch and the output end of the pre-step-down voltage stabilizer are connected with the low-step-down voltage stabilizer.
3. The mining intrinsically safe power module of claim 2, wherein the fine tuning voltage regulator circuit comprises a low-resistance parallel rectifier resistor string connected to the output of the low dropout voltage regulator, a varistor connected to the output of the low-resistance parallel rectifier resistor string at a first end and a contact end, and a fixed resistor connected to the other end of the varistor; the other end of the fixed resistor is externally connected with the output end of the power supply module.
4. The mining intrinsically safe power supply module of claim 3, wherein the switching power supply circuit comprises a rectification filter circuit connected with the input voltage stabilizing circuit, a switching power supply chip connected with the rectification filter circuit, and a high-frequency transformer connected with the switching power supply chip; the high-frequency transformer is connected with a double overvoltage and overcurrent protection circuit, and the short-circuit protection circuit, the circuit breaker and the switching power supply chip are connected with each other.
5. The mining intrinsically safe power supply module of claim 4, wherein the pre-step-down voltage regulator is a three-terminal integrated voltage regulator, an input terminal of the pre-step-down voltage regulator receives the output voltage of the output control switch, an output terminal of the pre-step-down voltage regulator is connected with an input terminal of the low-step-down voltage regulator, and a ground terminal of the low-step-down voltage regulator is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921878343.2U CN210518109U (en) | 2019-11-01 | 2019-11-01 | Mining intrinsic safety power module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921878343.2U CN210518109U (en) | 2019-11-01 | 2019-11-01 | Mining intrinsic safety power module |
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| Publication Number | Publication Date |
|---|---|
| CN210518109U true CN210518109U (en) | 2020-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921878343.2U Active CN210518109U (en) | 2019-11-01 | 2019-11-01 | Mining intrinsic safety power module |
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|---|---|
| CN (1) | CN210518109U (en) |
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- 2019-11-01 CN CN201921878343.2U patent/CN210518109U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A mining intrinsically safe power supply module Effective date of registration: 20211028 Granted publication date: 20200512 Pledgee: Ankang Finance and Credit Financing Guarantee Co.,Ltd. Xi'an Branch Pledgor: Xi'an blue Photoelectric Technology Co.,Ltd. Registration number: Y2021610000297 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20221212 Granted publication date: 20200512 Pledgee: Ankang Finance and Credit Financing Guarantee Co.,Ltd. Xi'an Branch Pledgor: Xi'an blue Photoelectric Technology Co.,Ltd. Registration number: Y2021610000297 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: An intrinsically safe power supply module for mining Effective date of registration: 20221215 Granted publication date: 20200512 Pledgee: Ankang Finance and Credit Financing Guarantee Co.,Ltd. Xi'an Branch Pledgor: Xi'an blue Photoelectric Technology Co.,Ltd. Registration number: Y2022610000811 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20231023 Granted publication date: 20200512 Pledgee: Ankang Finance and Credit Financing Guarantee Co.,Ltd. Xi'an Branch Pledgor: Xi'an blue Photoelectric Technology Co.,Ltd. Registration number: Y2022610000811 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |