CN201910652U - Mining flame-proof charging device - Google Patents
Mining flame-proof charging device Download PDFInfo
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- CN201910652U CN201910652U CN2010206257844U CN201020625784U CN201910652U CN 201910652 U CN201910652 U CN 201910652U CN 2010206257844 U CN2010206257844 U CN 2010206257844U CN 201020625784 U CN201020625784 U CN 201020625784U CN 201910652 U CN201910652 U CN 201910652U
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Abstract
The utility model discloses a mining flame-proof charging device which comprises a charging circuit and a digital control circuit formed by a central processing unit and a charging feedback circuit; the charging circuit comprises a triphase half-controlled bridge rectification circuit; the charging feedback circuit comprises a diverter, a current setting potentiometer; and the constant-current charging control output end of the central processing unit is connected with the constant-current charge control input end of the triphase half-controlled bridge rectification circuit. The diverter takes charging current signal samples and feeds back to the digital control circuit; the digital control circuit compares the charging current value fed back by the diverter with the set value of the current setting potentiometer and automatically regulates a controlled silicon trigger impulse conduction angle of the triphase half-controlled bridge rectification circuit; as the output current is increased, the conduction angle moves backwards and the voltage is reduced so as to reduce the current; as the output current is reduced, the conduction angle moves forwards and the voltage is increased so as to increase the current; therefore, constant-current charging is effectively achieved. The mining flame-proof charger device has the characteristic of steady current and has the advantages that the circuit is simple and the device is safe and reliable.
Description
Technical field
The utility model belongs to the technical field of battery charger, is specifically related to a kind of flame-proof mine charging device.
Background technology
At present, be widely used in the charging device of battery locomotive under the coal mine,, need adjust charging voltage and electric current at any time, operate quite loaded down with trivial detailsly, waste time and energy with artificial experience because of its technology content is lower.In addition, traditional charging device adopts little electric current, long charging modes usually, so the charging interval is quite long, and charge efficiency is quite low.For addressing this problem, some also adopts the charging modes of transferring big charging voltage, electric current to improve charge efficiency, but this is easy to make storage battery to produce polarization phenomena, makes that the hydrolysis phenomenon of storage battery is comparatively serious, as untimely fluid infusion, will have a strong impact on the useful life of storage battery.Can moreover above-mentioned two kinds of charging modes all will lean on manually manual operations by rule of thumb, scientific and reasonablely charge for storage battery and then can't judge, therefore phenomenon often occurs overcharging, have a strong impact on the useful life of storage battery equally.
Studies show that according to the characteristic rule that battery locomotive under the coal mine is discharged and recharged, whole charging process is a more complicated, storage battery is required to carry out constant current charge, in whole charging process, the charging device output voltage is needed a dynamic changing value, and traditional mechanically operated charging device of dependence artificial experience, be to guarantee storage battery is carried out scientific and reasonable constant current charge, be difficult to effectively guarantee the useful life of storage battery, needing improvements badly so the structure of traditional charging device remains.
The utility model content
The flame-proof mine charging device that the technical problems to be solved in the utility model provides a kind of constant current charge, has stabilized current characteristic, circuit is simple and safe and reliable.
For solving the problems of the technologies described above, the utility model provides a kind of flame-proof mine charging device, comprises charging circuit 1; Also comprise the digital control circuit 2 that is used to control charging circuit 1 constant current charge; Described digital control circuit 2 comprises: CPU and charging feedback circuit; Charging circuit 1 comprises: three-phase half controlled bridge rectification circuit 11; Described charging feedback circuit comprises: the shunt FL that links to each other with the output of three-phase half controlled bridge rectification circuit 11, the given potentiometer RP of electric current that links to each other with CPU; The constant current charge control output end of described CPU links to each other with the constant current charge control input end of three-phase half controlled bridge rectification circuit 11.
Further, described flame-proof mine charging device also comprises indicating circuit 3, and described indicating circuit 3 comprises charging voltage sample circuit, charging current sample circuit, the display driver circuit that is electrically connected with the output of charging voltage sample circuit and charging current sample circuit respectively and the display instrument that is electrically connected with the output of display driver circuit.
Further, described charging circuit 1 comprises: the three-phase automatic switch K1 that links to each other with w with external three phase mains u, v, first group of contact of the A.C. contactor KM1 that links to each other with the current output terminal of three-phase automatic switch K1, the three phase mains transformer T1 that is electrically connected with first group of contact of A.C. contactor KM1, the three-phase half controlled bridge rectification circuit 11 that is electrically connected with the secondary coil of power transformer T1.
Further, described digital control circuit 2 also comprises: the protective circuit that links to each other with the phase failure signal input part of CPU.
Further, described external three phase mains u, v link to each other with primary coil of a transformer T2 with two-phase among the w; Protective circuit comprises: the open-phase protection circuit that links to each other with the secondary coil of three phase mains transformer T1, be connected electrically in an end of the secondary coil of described transformer T2 by normally closed switch SB2 with first output of open-phase protection circuit, the other end of the secondary coil of transformer T2 links to each other with the first open phase protection control end of described CPU through the coil of A.C. contactor KM1; Second output of open-phase protection circuit links to each other with the second open phase protection control end of described CPU through second group of contact of A.C. contactor KM1; Be provided with normal open switch SB1 between first output of described open-phase protection circuit and second output.
Further, this charging device has flame-proof type housing 4; Described flame-proof type housing 4 comprises cylindric explosion insulation main cavity 41, be positioned at the flame proof control chamber 42 at explosion insulation main cavity 41 tops and be positioned at the explosion insulation connecting line cavity 43 of explosion insulation main cavity 41 sidepieces; Be provided with three-phase half controlled bridge rectification circuit 11 and overflow protecting element in the described explosion insulation main cavity 41, be provided with the LED display instrument in the described flame proof control chamber 42; Be provided with input terminal and lead-out terminal in the described explosion insulation connecting line cavity 43.
The technique effect that the utlity model has:
(1) the utility model has adopted the three-phase half controlled bridge rectification circuit, effectively realizes having stabilized current characteristic by constant current charge; When overload or short circuit, digital control circuit sends and turn-offs instruction, and A.C. contactor is disconnected, and cuts off operating current.In addition, can sample charging current signal and feed back to digital control circuit of shunt FL in the triggering signal circuit, digital control circuit compares the current signal and the given potentiometer RP of the electric current current signal of shunt FL feedback, regulates the SCR trigger pulse angle of flow in the three-phase half controlled bridge rectification circuit automatically; When output current rises, move behind the angle of flow, reduction voltage makes it electric current and descends thereupon; Angle of flow reach when output current descends, output voltage rises, and electric current rises thereupon, reaches the requirement of constant current charge; Can effectively protect rechargeable battery, improve the constant current performance of charging device, prolong the useful life of rechargeable battery.In addition, this kind digital control circuit also has advantages such as circuit is simple, safe and reliable.
(2) in the utility model, when connecting storage battery on the output of three-phase half controlled bridge rectification circuit, because this moment, the three-phase automatic switch was still not closed, described display instrument can show the residual voltage of storage battery; If voltmeter does not have demonstration when connecting storage battery, then need to overhaul or check whether reversal connection of storage battery, thereby have certain early warning effect, this structure has effectively improved the security performance of charging device, has also effectively protected storage battery simultaneously.
(3) charging device of the present utility model comprises protective circuit, and it can guarantee to shut down automatically when the transformer secondary output phase failure, could start the utility model after fixing a breakdown.
(4) in the utility model, described three-phase half controlled bridge rectification circuit comprises: controllable silicon major component, piezo-resistance R and rectifier diode D; When controllable silicon or rectifier diode electric current were excessive, piezo-resistance can consume the part electric energy, and circuit is carried out overcurrent protection, has improved the stability of charging device.
(5) in the utility model, described flame-proof type housing comprises cylindric explosion insulation main cavity, be positioned at the flame proof control chamber of main top of chamber and be positioned at the explosion insulation connecting line cavity of main chamber sidepiece; Be provided with three-phase half controlled bridge rectification circuit and overflow protecting element in the described explosion insulation main cavity, be provided with control devices such as LED display instrument and other auxiliary switches in the described flame proof control chamber; Be provided with input terminal and lead-out terminal in the described explosion insulation connecting line cavity.The structure of the cavate of flame proof more than this kind can will easily produce the AC portion and the control section of spark, is separately positioned on independently in the explosion-proof chamber, has improved the fail safe and the stability of control section.
Description of drawings
For the easier quilt of content of the present utility model is clearly understood, below the specific embodiment and in conjunction with the accompanying drawings of basis, the utility model is described in further detail, wherein
Fig. 1 is a kind of structural representation of facing of the present utility model.
Fig. 2 is a kind of side-looking structural representation of flame-proof mine charging device shown in Figure 1.
Fig. 3 is the electrical schematic diagram of flame-proof mine charging device shown in Figure 1.
Embodiment
Fig. 1-3 discloses a kind of embodiment of the present utility model, Fig. 1 is a kind of structural representation of facing of the present utility model, Fig. 2 is a kind of side-looking structural representation of flame-proof mine charging device shown in Figure 1, Fig. 3 is the flame-proof mine charging device of the electrical schematic diagram present embodiment of flame-proof mine charging device shown in Figure 1, comprising: charging circuit 1 and the digital control circuit 2 that is used to control charging circuit 1 constant current charge.
Described digital control circuit 2 comprises: CPU, charging feedback circuit and the protective circuit that links to each other with the phase failure signal input part of CPU.；
Described charging feedback circuit comprises: the shunt FL that links to each other with the output of three-phase half controlled bridge rectification circuit 11, the given potentiometer RP of electric current that links to each other with CPU; The constant current charge control output end of described CPU links to each other with the constant current charge control input end of three-phase half controlled bridge rectification circuit 11.
The power output end of three-phase half controlled bridge rectification circuit 11 is provided with indicating circuit 3, is used for detecting and showing charging voltage and charging current; A among Fig. 3 is the electric current display driver circuit, and V is the voltage display driver circuit, and DY is a display instrument.
Described external three phase mains u, v link to each other with primary coil of a transformer T2 with two-phase among the w; Protective circuit comprises: the open-phase protection circuit that links to each other with the secondary coil of three phase mains transformer T1, be connected electrically in an end of the secondary coil of described transformer T2 by normally closed switch SB2 with first output of open-phase protection circuit, the other end of the secondary coil of transformer T2 links to each other with the first open phase protection control end of described CPU through the coil of A.C. contactor KM1; Second output of open-phase protection circuit links to each other with the second open phase protection control end of described CPU through second group of contact of A.C. contactor KM1; Be provided with normal open switch SB1 between first output of described open-phase protection circuit and second output.
The charging device of present embodiment has flame-proof type housing 4; Described flame-proof type housing 4 comprises cylindric explosion insulation main cavity 41, be positioned at the flame proof control chamber 42 at explosion insulation main cavity 41 tops and be positioned at the explosion insulation connecting line cavity 43 of explosion insulation main cavity 41 sidepieces; Be provided with three-phase half controlled bridge rectification circuit 11 and overflow protecting element in the described explosion insulation main cavity 41, be provided with the LED display instrument in the described flame proof control chamber 42; Be provided with input terminal and lead-out terminal in the described explosion insulation connecting line cavity 43.
In the present embodiment, primary coil of described two-pack coil power transformer T1 can carry out wye connection or Δ type connection.
The operation principle of the charging device of present embodiment is as follows:
Three phase mains is through in the automatic switch K1 place in circuit, and three phase mains inserts three-phase half controlled bridge rectification circuit 11 through power transformer T1 and by fuse FU1.Behind the storage battery place in circuit, display instrument DY in the indicating circuit 3 shows the residual voltage of storage battery, if voltmeter does not have demonstration when connecting storage battery, then needs to overhaul or checks whether reversal connection of storage battery, thereby realize storage battery is protected.When display instrument DY shows just often, start the three-phase automatic switch and connect external power supply charge in batteries, digital control circuit 2 receives the current signal of shunt FL feedback and compares with the given potentiometer RP of electric current current signal, controllable silicon major component in the three-phase half controlled bridge rectification circuit 11 is sent control signal, regulate the SCR trigger pulse angle of flow.When output current rises, move behind the angle of flow, reduction voltage makes it electric current and descends thereupon; Angle of flow reach when output current descends, output voltage rises, and electric current rises thereupon, realizes constant current charge.When overload or overcurrent were arranged in the circuit, digital control circuit 2 sent and turn-offs instruction, by the control A.C. contactor, made it disconnect three-phase power circuit, cut off operating current, and circuit is transshipped or overcurrent protection.
The technique effect that present embodiment has:
(1) in the present embodiment, adopts the three-phase half controlled bridge rectification circuit, need not adjust phase sequence; And use the intelligent digital control circuit, have circuit advanced person, novel structure, move, overhaul characteristics such as convenience, reliability height.
(2) in the present embodiment, comprise indicating circuit 3, described indicating circuit 3 comprises charging voltage sample circuit, charging current sample circuit, display circuit drive circuit and display instrument; Voltmeter shows the residual voltage of storage battery when connecting storage battery, if voltmeter does not have demonstration when connecting storage battery, then needs to overhaul or checks whether reversal connection of storage battery; Improve the security performance of charging device, effectively protected storage battery.
(3) in the present embodiment, CPU is electrically connected with controllable silicon in the three-phase half controlled bridge rectification circuit; To sample charging current signal and feed back to digital control circuit of the shunt FL that adopts, digital control circuit 2 compares the current value that the current value of shunt FL feedback and the given potentiometer RP of electric current set, automatically regulate the SCR trigger pulse angle of flow in the three-phase half controlled bridge rectification circuit 11, when output current rises, move behind the angle of flow, reduction voltage makes it electric current and descends thereupon; Angle of flow reach when output current descends, output voltage rises, and electric current rises thereupon, reaches the requirement of constant current charge; Can effectively protect rechargeable battery, improve the constant current performance of charging device, prolong the useful life of rechargeable battery.
(4) in the present embodiment, described three-phase half controlled bridge rectification circuit comprises controllable silicon major component, piezo-resistance, rectifier diode; Described rectifier diode positive electrical connects the anode of controllable silicon major component, is connected electrically in by fuse on the single phase circuit of transformer secondary coil three-phase electricity by tie point, respectively is parallel with the piezo-resistance of protective circuit on described rectifier diode and the controllable silicon major component; Be parallel with piezo-resistance on the controllable silicon, when controllable silicon or rectifier diode electric current are excessive, can carry out overcurrent protection, improved the stability of charging device circuit.
(5) in the present embodiment, when overload or overcurrent are arranged in the circuit, send the shutoff instruction, A.C. contactor KM1 is disconnected, cut off the three phase mains main circuit by digital control circuit; The overcurrent and the overload protection function that have improved charging device are arranged.
Obviously, the foregoing description only is for the utility model example clearly is described, and is not to be qualification to execution mode of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all execution modes.And these belong to conspicuous variation or the change that spirit of the present utility model extended out and still are among the protection range of the present utility model.
Claims (5)
1. a flame-proof mine charging device comprises: charging circuit (1); It is characterized in that: also comprise the digital control circuit (2) that is used to control charging circuit (1) constant current charge; Described digital control circuit (2) comprising: CPU and charging feedback circuit; Charging circuit (1) comprising: three-phase half controlled bridge rectification circuit (11); Described charging feedback circuit comprises: the shunt (FL) that links to each other with the output of three-phase half controlled bridge rectification circuit (11), the given potentiometer of electric current (RP) that links to each other with CPU; The constant current charge control output end of described CPU links to each other with the constant current charge control input end of three-phase half controlled bridge rectification circuit (11).
2. flame-proof mine charging device according to claim 1 is characterized in that: described charging circuit (1) comprising: first group of contact of the three-phase automatic switch (K1) that links to each other with external three phase mains (u, v and w), the A.C. contactor (KM1) that links to each other with the current output terminal of three-phase automatic switch (K1), the three phase mains transformer (T1) that is electrically connected with first group of contact of A.C. contactor (KM1), the three-phase half controlled bridge rectification circuit (11) that is electrically connected with the secondary coil of power transformer (T1).
3. flame-proof mine charging device according to claim 2 is characterized in that: described digital control circuit (2) also comprises: the protective circuit that links to each other with the phase failure signal input part of CPU.
4. flame-proof mine charging device according to claim 3 is characterized in that: the two-phase in the described external three phase mains (u, v and w) links to each other with primary coil of a transformer (T2);
Protective circuit comprises: the open-phase protection circuit that links to each other with the secondary coil of three phase mains transformer (T1), be connected electrically in an end of the secondary coil of described transformer (T2) with first output of open-phase protection circuit by normally closed switch (SB2), the other end of the secondary coil of transformer (T2) links to each other with the first open phase protection control end of described CPU through the coil of A.C. contactor (KM1); Second output of open-phase protection circuit links to each other with the second open phase protection control end of described CPU through second group of contact of A.C. contactor (KM1); Be provided with normal open switch (SB1) between first output of described open-phase protection circuit and second output.
5. according to the described flame-proof mine charging device of one of claim 1-4, it is characterized in that: this charging device has flame-proof type housing (4); Described flame-proof type housing (4) comprises cylindric explosion insulation main cavity (41), be positioned at the flame proof control chamber (42) at explosion insulation main cavity (41) top and be positioned at the explosion insulation connecting line cavity (43) of explosion insulation main cavity (41) sidepiece; Be provided with three-phase half controlled bridge rectification circuit (11) and overflow protecting element in the described explosion insulation main cavity (41), be provided with the LED display instrument in the described flame proof control chamber (42); Described explosion insulation connecting line cavity is provided with input terminal and lead-out terminal in (43).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206257844U CN201910652U (en) | 2010-11-25 | 2010-11-25 | Mining flame-proof charging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206257844U CN201910652U (en) | 2010-11-25 | 2010-11-25 | Mining flame-proof charging device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201910652U true CN201910652U (en) | 2011-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206257844U Expired - Fee Related CN201910652U (en) | 2010-11-25 | 2010-11-25 | Mining flame-proof charging device |
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| Country | Link |
|---|---|
| CN (1) | CN201910652U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113013960A (en) * | 2021-04-20 | 2021-06-22 | 台州竞添机电有限公司 | Novel charger |
-
2010
- 2010-11-25 CN CN2010206257844U patent/CN201910652U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113013960A (en) * | 2021-04-20 | 2021-06-22 | 台州竞添机电有限公司 | Novel charger |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110727 Termination date: 20141125 |
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| EXPY | Termination of patent right or utility model |