CN201927990U - Intrinsic safety circuit for belt protection machine for coal mine - Google Patents
Intrinsic safety circuit for belt protection machine for coal mine Download PDFInfo
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- CN201927990U CN201927990U CN2011200129118U CN201120012911U CN201927990U CN 201927990 U CN201927990 U CN 201927990U CN 2011200129118 U CN2011200129118 U CN 2011200129118U CN 201120012911 U CN201120012911 U CN 201120012911U CN 201927990 U CN201927990 U CN 201927990U
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Abstract
The utility model discloses an intrinsic safety circuit for a belt protection machine for a coal mine, which comprises a front end terminal, wherein a capacitance filter circuit, a voltage stabilizing processing circuit, an intrinsic safety power supply and an intrinsic safety output circuit are connected in turn behind the front end terminal; a secondary overvoltage overcurrent protection circuit is arranged between the voltage stabilizing processing circuit and the intrinsic safety power supply; the secondary overvoltage overcurrent protection circuit comprises two voltage stabilizers with three adjustable ends and two voltage comparator chips, the two voltage stabilizers with the three adjustable ends are used for preventing working voltage from exceeding safety voltage and the two voltage comparator chips are used for preventing working current from exceeding safety current. The intrinsic safety circuit for the belt protection machine of the coal mine is specially designed for the belt protection machine which is used for the places in the coal mine that the gas and coal dust explosion danger exists.
Description
Technical field
The utility model relates to a kind of colliery belt protection machine, particularly a kind of colliery intrinsically safe circuit of belt protection machine.
Background technology
Coal industry is the basic energy resource industry of China, and there is more than 100 in large-scale colliery group in the whole nation, and mine has more than 10,000.Along with downhole safety accident in recent years takes place frequently; more and more higher in the requirement that coal mine downhole safety is produced; some traditional belt protection functions can not satisfy the Modern coal mines requirement of safe production; when the conveyer protective device has produced when unusual; owing to cannot make correct reaction the very first time, the hidden danger of security incident is arranged.So the improvement at the intrinsic safety electric source circuit engineering of belt protection machine is very necessary.
The utility model content
The utility model purpose: technical problem to be solved in the utility model is at the deficiencies in the prior art, and the intrinsically safe circuit of a kind of colliery with the belt protection machine is provided.
In order to solve the problems of the technologies described above, the utility model discloses the intrinsically safe circuit of a kind of colliery with the belt protection machine, comprise the front end binding post, connect capacitor filter, voltage stabilizing treatment circuit, intrinsic safety electric source and intrinsic safety output circuit behind the front end binding post successively, between described voltage stabilizing treatment circuit and described intrinsic safety electric source, be connected with the secondary over-voltage over-current protection circuit;
Described secondary over-voltage over-current protection circuit comprises that two three ends can adjust pressurizer and be used for restraint of labour voltage and surpass safe voltage, and two voltage comparator chips are used for the restraint of labour electric current and surpass safe current.
In the utility model, preferably, described the one or three end can be adjusted 3 pin of pressurizer and connect with 1 pin that the two or three end can be adjusted pressurizer, and 1 pin that the one or three end can be adjusted pressurizer is connected with described voltage stabilizing treatment circuit output; 2 pin that the one or three end can be adjusted pressurizer divide two-way, and one the tunnel connects resistance R 2 back ground connection, and another Lu Yuyi triode links to each other; The base stage of this triode is connected with 3 pin that the two or three end can be adjusted pressurizer, collector electrode is connected 2 pin that the one or three end can be adjusted pressurizer with resistance R 7 continuous backs, emitter connects 3 pin and the resistance R 6 that the one or three end can be adjusted pressurizer respectively, and resistance R 6 connects 2 pin that the one or three end can be adjusted pressurizer; 2 pin that the two or three end can be adjusted pressurizer link to each other by resistance R 4 with 3 pin, and 2 pin that the two or three end can be adjusted pressurizer connect described two voltage comparator chips respectively.
In the utility model, preferably, the output head grounding of the described first voltage comparator chip, its positive input terminal connects the positive input terminal of the described second voltage comparator chip and 3 pin that the two or three end can be adjusted pressurizer, the first voltage comparator chip negative input end connects the output of the described second voltage comparator chip, the negative input end ground connection of the described second voltage comparator chip.
In the utility model, it is that model is that three ends of LM317 can be adjusted pressurizer that described three ends can be adjusted pressurizer.
In the utility model, described voltage comparator chip is that model is the voltage comparator chip of LM393.
In the utility model, outconnector links to each other with a triode and has played the effect of feedback regulation between interconnective 2 LM317 chips; Simultaneously might the excessive phenomenon that burns out chip of electric current at short circuit the time, introduce 2 diodes and played the short-circuit protection effect.
Beneficial effect: colliery described in the utility model is designed at the belt protection machine of the place use that gas and coal dust explosion hazard are arranged under the mine specially with the intrinsically safe circuit of belt protection machine.Can well satisfy the specific (special) requirements of belt protection machine, realize good power supply; And can make protective reaction timely at special situation.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is done further to specify, above-mentioned and/or otherwise advantage of the present utility model will become apparent.
Fig. 1 is the intrinsically safe circuit module map of the utility model colliery with the belt protection machine.
Fig. 2 is the intrinsically safe circuit schematic diagram of this practical colliery with the belt protection machine.
Embodiment:
As shown in Figure 1, a kind of colliery of the utility model intrinsically safe circuit of belt protection machine, comprise the front end binding post, connect capacitor filter, voltage stabilizing treatment circuit, intrinsic safety electric source and intrinsic safety output circuit behind the front end binding post successively, between described voltage stabilizing treatment circuit and described intrinsic safety electric source, be connected with the secondary over-voltage over-current protection circuit; Described secondary over-voltage over-current protection circuit comprises that two three ends can adjust pressurizer and be used for restraint of labour voltage and surpass safe voltage, and two voltage comparator chips are used for the restraint of labour electric current and surpass safe current.
As shown in Figure 2, described first three end can be adjusted 3 pin of voltage regulator chip U1 and connect with 1 pin that second three end can be adjusted voltage regulator chip U2, and 1 pin of the first chip U1 is connected with described voltage stabilizing treatment circuit output; 2 pin of the first chip U1 divide two-way, and one the tunnel connects resistance R 2 back ground connection, and another Lu Yuyi triode T1 links to each other; The base stage of this triode is connected with 3 pin that the two or three end can be adjusted pressurizer, collector electrode is connected 2 pin that the one or three end can be adjusted pressurizer with resistance R 7 continuous backs, emitter connects 3 pin and the resistance R 6 of the first chip U1 respectively, and resistance R 6 connects 2 pin of the first chip U1; 2 pin of the second chip U2 link to each other by resistance R 4 with 3 pin, and 2 pin of the second chip U2 connect described two voltage comparator chips respectively.The output head grounding of the described first voltage comparator chip U3, its positive input terminal connects the positive input terminal of the described second voltage comparator chip U4 and 3 pin that the two or three end can be adjusted pressurizer, the first voltage comparator chip negative input end connects the output of the described second voltage comparator chip, the negative input end ground connection of the described second voltage comparator chip.It is that model is that three ends of LM317 can be adjusted pressurizer that described three ends can be adjusted pressurizer.Described voltage comparator chip is that model is the voltage comparator chip of LM393.
More particularly, three ends of interconnective LM317 National Semiconductor can be adjusted the integrated dual overvoltage crowbar of pressurizer and 2 two integrated dual current foldback circuits of voltage comparator of interconnective LM393 among Fig. 2.Short circuit current has added some special short-circuit protection circuits to the influence of circuit when considering equipment fault simultaneously.
3 pin of the first chip U1 are directly connected with 1 pin of the second chip U2, and 1 pin of the first chip U1 is connected with the output of rectifier diode circuit simultaneously.No. 2 pins that three ends can be adjusted pressurizer are the voltage-regulation end, No. 2 pins of the first chip U1 connect resistance R 2 back ground connection, be subjected to 3 utmost point management and control system on-off circuits that No. 3 pins of the 2nd chip U2 output link to each other and link to each other with one again, the base stage of 3 utmost point pipes links to each other with No. 3 output pins of the second chip U2, collector electrode links to each other with resistance R 7 and is connected to No. 2 pin of the first chip U1, the emitter place with also be connected resistance R 6 beyond No. 3 pins of output of the first chip U1 link to each other, link the first chip U1 No. 2 pin its linking to each other with No. 1 port of the 3rd chip U3.No. 2 pin of the second chip U2 link to each other by resistance R 4 with No. 3 pin, and No. 2 pin link to each other with the dual overcurrent protection short circuit that 2 voltage comparators are formed respectively again simultaneously.
One 3 cross streams transformer of alternating voltage input as input plays output and is connected to a rectification circuit by a fuse FUSE1, the anodal input that can adjust pressurizer as three ends.2 three ends can adjust pressurizer and the circuit around it has played dual overvoltage protection effect to this intrinsic safety device.Diode D13 ~ D16 has formed a rectification circuit and with the first electrochemical capacitor C1 and the second electrochemical capacitor C2 it has been carried out filtering; because three ends can be adjusted pressurizer and be used to make digital and Adjustable; often, the variable resistor loose contact is used to protect the first chip U1 and the second chip U2 because of raising output voltage to burn load to increase diode D17, D18 like this; prevent that the short circuit current that causes because of uncertain factor is excessive, burn out chip.Triode T1 has played No. 2 pins that output with the second chip U2 feeds back to its input and the first chip U1 and has regulated the effect that the voltage stabilizing ends have well played feedback regulation.
Chip three ends described in the utility model can adjust pressurizer, voltage comparator and shown in ballasting circuit and device be common product.
The design of intrinsic safety electric current described in the utility model has the following advantages: the 127V alternating voltage is transformed into the intrinsic safety direct voltage of 12V, guarantees that simultaneously short circuit current is lower than 800mA; Dual overvoltage, overcurrent protection have added 2 diode D17, D18, have formed short-circuit protection circuit, and the intrinsic safety characteristic of this device is greatly improved.
The utility model provides thinking and the method for a kind of colliery with the intrinsically safe circuit of belt protection machine; the method and the approach of this technical scheme of specific implementation are a lot; the above only is a preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle, can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.The all available prior art of each part not clear and definite in the present embodiment is realized.
Claims (5)
1. a colliery is with the intrinsically safe circuit of belt protection machine, comprise the front end binding post, connect capacitor filter, voltage stabilizing treatment circuit, intrinsic safety electric source and intrinsic safety output circuit behind the front end binding post successively, it is characterized in that, between described voltage stabilizing treatment circuit and intrinsic safety electric source, be connected with the secondary over-voltage over-current protection circuit;
Described secondary over-voltage over-current protection circuit comprises that two three ends can adjust pressurizer and be used for restraint of labour voltage and surpass safe voltage, and two voltage comparator chips are used for the restraint of labour electric current and surpass safe current.
2. a kind of colliery according to claim 1 intrinsically safe circuit of belt protection machine, it is characterized in that, described the one or three end can be adjusted 3 pin of pressurizer and connect with 1 pin that the two or three end can be adjusted pressurizer, and 1 pin that the one or three end can be adjusted pressurizer is connected with described voltage stabilizing treatment circuit output; 2 pin that the one or three end can be adjusted pressurizer divide two-way, and one the tunnel connects resistance R 2 back ground connection, and another Lu Yuyi triode links to each other; The base stage of this triode is connected with 3 pin that the two or three end can be adjusted pressurizer, collector electrode is connected 2 pin that the one or three end can be adjusted pressurizer with resistance R 7 continuous backs, emitter connects 3 pin and the resistance R 6 that the one or three end can be adjusted pressurizer respectively, and resistance R 6 connects 2 pin that the one or three end can be adjusted pressurizer; 2 pin that the two or three end can be adjusted pressurizer link to each other by resistance R 4 with 3 pin, and 2 pin that the two or three end can be adjusted pressurizer connect described two voltage comparator chips respectively.
3. a kind of colliery according to claim 2 intrinsically safe circuit of belt protection machine; it is characterized in that; the output head grounding of the described first voltage comparator chip; its positive input terminal connects the positive input terminal of the described second voltage comparator chip and 3 pin that the two or three end can be adjusted pressurizer; the first voltage comparator chip negative input end connects the output of the described second voltage comparator chip, the negative input end ground connection of the described second voltage comparator chip.
4. a kind of colliery according to claim 2 is characterized in that with the intrinsically safe circuit of belt protection machine, and it is that model is that three ends of LM317 can be adjusted pressurizer that described three ends can be adjusted pressurizer.
5. a kind of colliery according to claim 2 is characterized in that with the intrinsically safe circuit of belt protection machine described voltage comparator chip is that model is the voltage comparator chip of LM393.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200129118U CN201927990U (en) | 2011-01-17 | 2011-01-17 | Intrinsic safety circuit for belt protection machine for coal mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200129118U CN201927990U (en) | 2011-01-17 | 2011-01-17 | Intrinsic safety circuit for belt protection machine for coal mine |
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| Publication Number | Publication Date |
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| CN201927990U true CN201927990U (en) | 2011-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011200129118U Expired - Fee Related CN201927990U (en) | 2011-01-17 | 2011-01-17 | Intrinsic safety circuit for belt protection machine for coal mine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104037745A (en) * | 2013-03-07 | 2014-09-10 | 深圳市海洋王照明工程有限公司 | Output over-current protection circuit and lamp with over-current protection function |
| CN105059186A (en) * | 2015-07-28 | 2015-11-18 | 太原理工大学 | Mine intrinsically safe reversing early warning device |
| CN113030988A (en) * | 2021-03-02 | 2021-06-25 | 中煤科工集团重庆研究院有限公司 | Single-interface intrinsic safety explosion-proof laser radar sensor |
| CN113030915A (en) * | 2021-03-02 | 2021-06-25 | 中煤科工集团重庆研究院有限公司 | Multi-interface intrinsic safety explosion-proof laser radar sensor |
-
2011
- 2011-01-17 CN CN2011200129118U patent/CN201927990U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104037745A (en) * | 2013-03-07 | 2014-09-10 | 深圳市海洋王照明工程有限公司 | Output over-current protection circuit and lamp with over-current protection function |
| CN105059186A (en) * | 2015-07-28 | 2015-11-18 | 太原理工大学 | Mine intrinsically safe reversing early warning device |
| CN113030988A (en) * | 2021-03-02 | 2021-06-25 | 中煤科工集团重庆研究院有限公司 | Single-interface intrinsic safety explosion-proof laser radar sensor |
| CN113030915A (en) * | 2021-03-02 | 2021-06-25 | 中煤科工集团重庆研究院有限公司 | Multi-interface intrinsic safety explosion-proof laser radar sensor |
| CN113030915B (en) * | 2021-03-02 | 2024-03-15 | 中煤科工集团重庆研究院有限公司 | Multi-interface intrinsic safety explosion-proof laser radar sensor |
| CN113030988B (en) * | 2021-03-02 | 2024-03-15 | 中煤科工集团重庆研究院有限公司 | Single-interface intrinsic safety explosion-proof laser radar sensor |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110810 Termination date: 20120117 |