CN217863745U - Mining explosion-proof charging device - Google Patents

Mining explosion-proof charging device Download PDF

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Publication number
CN217863745U
CN217863745U CN202222006908.6U CN202222006908U CN217863745U CN 217863745 U CN217863745 U CN 217863745U CN 202222006908 U CN202222006908 U CN 202222006908U CN 217863745 U CN217863745 U CN 217863745U
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China
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switch
charging
contactor
proof
explosion
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Inventor
芦晓民
刘清玉
刘中新
马跃
李雄飞
王新民
芦帅
彭超
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Inner Mongolia Beigong Automobile Co ltd
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Inner Mongolia Beigong Heavy Machinery And Electrical Equipment Manufacturing Co ltd
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Priority to CN202222006908.6U priority Critical patent/CN217863745U/en
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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Abstract

The utility model discloses a mining explosion-proof charging device, which comprises an explosion-proof box body and a charging circuit arranged in the explosion-proof box body, wherein the charging circuit comprises a main loop, a control loop and a direct current charging module which are respectively connected with the main loop, and the direct current charging module is connected with external electric equipment; the main loop is externally connected with two input power supplies which are respectively used for underground charging and ground charging, and the control loop controls the main loop to charge the electric equipment through the direct current charging module. The utility model discloses a mining explosion-proof charging device can realize that the colliery is down with two different occasions on ground charge, when mining electric motor car takes place the electric quantity not enough, charges according to the environmental place flexibility of locating, has improved work efficiency.

Description

Mining explosion-proof charging device
Technical Field
The utility model relates to a colliery electric power field particularly, relates to a mining explosion-proof charging device who charges for mining car.
Background
In coal mine transportation, explosion-proof electric vehicle can meet the electric quantity not enough and charge in the transportation, charges to explosion-proof electric vehicle at present and is ground charging promptly aboveground, if explosion-proof electric vehicle can only go ground when the electric quantity is not enough in the pit and charge, can bring a great deal of inconvenience like this, can't be applicable to the electric vehicle transportation and the popularization under the mine operating mode.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a mining explosion-proof charging device solves the unable difficult problem of charging in the pit of current colliery electric vehicle in the pit.
In order to achieve the above object, according to the present invention, a mining explosion-proof charging device is provided, which comprises an explosion-proof box and a charging circuit disposed in the explosion-proof box, wherein the charging circuit comprises a main circuit, and a control circuit and a dc charging module respectively connected to the main circuit, and the dc charging module is connected to an external electric device; the main loop is externally connected with two input power supplies which are respectively used for underground charging and ground charging, and the control loop controls the main loop to charge the electric equipment through the direct current charging module.
The main loop comprises a first main loop and a second main loop, the first main loop is connected with one of the two input power supplies for underground charging, and the second main loop is connected with the other of the two input power supplies for ground charging; the control loop comprises a first control loop connected with the first main loop and a second control loop connected with the second main loop.
The first main loop comprises an input end, a first load isolating switch, a first fuse, a transformer and a first alternating current contactor, wherein the input end is connected with one end of the first load isolating switch through a wiring terminal, the other end of the first load isolating switch is connected with the input side of the transformer through the first fuse, the output side of the transformer is connected with a normally open main contact input end of the first alternating current contactor, a normally open main contact output end of the first alternating current contactor is connected with a direct current charging module input end, and an external power device is connected with the direct current charging module output end.
The second main loop comprises an input end, a second load isolating switch, a second fuse and a second alternating current contactor, the input end of the second main loop is connected with one end of the second load isolating switch through a wiring terminal, the other end of the second load isolating switch is connected with a normally open main contact input end of the second alternating current contactor through the second fuse, and the normally open main contact output end of the second alternating current contactor is connected with the direct current charging module input end.
The input power supply connected with the first main loop is AC660V input voltage, and the input power supply connected with the second main loop is AC380V input voltage.
The voltage of the input side of the transformer is AC660V, and the voltage of the output side of the transformer is AC380V.
First control circuit includes first air switch, change over switch, second ac contactor's normally closed auxiliary contact and first ac contactor coil, the output side of transformer is connected the input side of first air switch, this change over switch's normally open one is connected to first air switch's output side one end, and this change over switch's normally open one is connected second ac contactor's normally closed auxiliary contact input, this first ac contactor coil one end is connected to second ac contactor's normally closed auxiliary contact output, and this first ac contactor coil other end is connected the other end of first air switch's output side.
The second control loop comprises a second air switch, a change-over switch, a normally closed auxiliary contact of a first alternating current contactor and a second alternating current contactor coil, the output end of the second load isolating switch is connected with the input side of the second air switch, one end of the output side of the second air switch is connected with the normally open position of the change-over switch, the normally open position of the change-over switch is connected with the normally closed auxiliary contact input end of the first alternating current contactor, the normally closed auxiliary contact output end of the first alternating current contactor is connected with one end of the second alternating current contactor coil, and the other end of the second alternating current contactor coil is connected with the other end of the output side of the second air switch.
The first control loop comprises a first limit switch and a second limit switch which are connected, the normally open position of the change-over switch is connected with the input end of the first limit switch, the output end of the first limit switch is connected with the input end of the second limit switch, and the output end of the second limit switch is connected with the input end of the normally closed auxiliary contact of the second alternating current contactor; the second control loop comprises a third limit switch and a fourth limit switch which are connected, the normally open two position of the change-over switch is connected with the input end of the third limit switch, the output end of the third limit switch is connected with the input end of the fourth limit switch, and the output end of the fourth limit switch is connected with the input end of the normally closed auxiliary contact of the first alternating current contactor.
The mining explosion-proof charging device comprises a display loop, the display loop comprises a first display loop connected with the first main loop and a second display loop connected with the second main loop, and each display loop comprises an indicator light and an air switch which are connected with each other.
The direct current charging module is provided with a charging port or two charging ports and is used for being connected with an explosion-proof charging gun or two explosion-proof charging guns.
The direct current charging module is connected with a starting switch and an emergency stop button.
The anti-explosion box body is provided with a glass window and a leading-in device, and conductive paint for resisting electromagnetic interference is coated on the glass window and the anti-explosion surface of the rubber ring of the leading-in device.
The utility model discloses a mining explosion-proof charging device can realize that the colliery is down to charge with two different occasions on ground, when mining electric motor car takes place the electric quantity not enough, charges according to the environmental place flexibility of locating, has improved work efficiency, has satisfied the colliery demand of charging.
Drawings
Fig. 1 is an external structural schematic diagram of the mining explosion-proof charging device of the utility model;
fig. 2 is the utility model discloses the inside charging circuit's of mining explosion-proof charging device electrical structure schematic diagram.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
As shown in fig. 1 and fig. 2, the mining explosion-proof charging device of the present invention includes an explosion-proof box 1 and a charging circuit disposed in the explosion-proof box, wherein the charging circuit of the mining explosion-proof charging device includes a main circuit, and a control circuit and a dc charging module respectively connected to the main circuit; the direct current charging module is connected with external electric equipment. The main loop can be externally connected with two input power supplies, wherein the two input power supplies are an underground three-phase AC660V input voltage and a ground common power supply, namely a three-phase AC380V input voltage; the control loop is connected with the main loop and controls the main loop to charge the electric equipment through the direct current charging module.
The utility model provides a major loop includes first major loop and second major loop, wherein first major loop includes the input, first load isolator GLK1, first fuse FU1, transformer T and AC contactor KM1, the input of first major loop is connected to AC660V input voltage, this input passes through binding post and connects first load isolator GLK1 one end, the first load isolator GLK1 other end is through first fuse FU1 connection transformer T one side (input side), transformer T opposite side (output side) is connected first AC contactor KM 1's normally open main contact input, dc charging module input is connected to first AC contactor KM 1's normally open main contact output, outside consumer is connected to the dc charging module output, like explosion-proof electric vehicle. One side of the transformer T close to the first fuse FU1 is AC660V, and the other side of the transformer T close to the first AC contactor KM1 is AC380V.
The utility model provides a second main loop includes the input, second load isolator GLK2, second fuse FU2 and second AC contactor KM2, the input in second main loop is connected to AC380V input voltage, this input passes through binding post and connects second load isolator GLK2 one end, the second load isolator GLK2 other end passes through second fuse FU2 and connects second AC contactor KM2 normally open main contact input, the DC charging module input is connected to second AC contactor KM2 normally open main contact output, the outside consumer is connected to the DC charging module output.
The utility model provides a control circuit includes the first control circuit who is connected with first major loop and the second control circuit who is connected with second major loop. Wherein the first control loop comprises a first air switch DZ1, a change-over switch SW, a normally closed auxiliary contact KM22 of a second AC contactor and a first AC contactor coil KM1 ’ One side of AC380V of the transformer T is connected with the input side of a first air switch DZ1, one end of the output side of the first air switch DZ1 is connected with a normally open bit of a change-over switch SW, and the normally open bit of the change-over switch SW is connected with a normally closed auxiliary contact KM22 of a second alternating current contactorThe input end of the second AC contactor normally-closed auxiliary contact KM22 and the output end of the second AC contactor normally-closed auxiliary contact KM22 are connected with a first AC contactor coil KM1 ’ One end, a first ac contactor coil KM1 ’ The other end is connected with the other end of the output side of the first air switch DZ 1.
Wherein the second control loop comprises a second air switch DZ2, a change-over switch SW, a normally closed auxiliary contact KM11 of the first AC contactor and a second AC contactor coil KM2 ’ The output end of a second load isolation switch GLK2 is connected with the input side of a second air switch DZ2, one end of the output side of the second air switch DZ2 is connected with a normally open two-position switch of a change-over switch SW, the normally open two-position switch of the change-over switch SW is connected with the input end of a normally closed auxiliary contact KM11 of a first alternating current contactor, and the output end of the normally closed auxiliary contact KM11 of the first alternating current contactor is connected with a coil KM2 of a second alternating current contactor ’ One end, second ac contactor coil KM2 ’ The other end is connected with the other end of the output side of the second air switch DZ 2.
The utility model discloses a mining explosion-proof charging device still includes the demonstration return circuit of being connected with the major loop, should show the return circuit and include the first demonstration return circuit of being connected with first major loop and show the return circuit with the second that the second major loop is connected. The first display loop comprises a first indicator lamp XD1 and a third air switch DZ3, one end of the AC380V side of the transformer T is connected with one end of the first indicator lamp XD1, the other end of the first indicator lamp XD1 is connected with the input side of the third air switch DZ3, and the output side of the third air switch DZ3 is connected with the other end of the AC380V side of the transformer T. The second display loop comprises a second indicator lamp XD2 and a fourth air switch DZ4, one output end of a second load isolating switch GLK2 is connected with one end of the second indicator lamp XD2, the other end of the second indicator lamp XD2 is connected with the input side of the fourth air switch DZ4, and the output side of the fourth air switch DZ4 is connected with the other output end of the second load isolating switch GLK 2.
The utility model discloses a mining explosion-proof charging device is when using, and AC660V input voltage is used for charging in the pit, and AC380V input voltage is used for ground to charge. When being used for charging in the pit, input AC660V power, closed first load isolator GLK1 becomes AC380V with AC660V through transformer T (because the utility model discloses the embodiment of direct current module of charging is that AC380V is defeatedIn), by closing the normally open one position of the changeover switch SW (i.e., right side closed in fig. 1), the first ac contactor coil KM1 ’ The first alternating current contactor KM1 normally-open main contact is closed by electrifying (at the moment, the normally-closed auxiliary contact KM11 of the first alternating current contactor is disconnected), so that the direct current charging module is supplied with power (alternating current 380V is changed into adjustable direct current), and the direct current charging module is connected with external electric equipment and charges the electric equipment. The AC380V alternating current is changed into adjustable direct current which CAN be adjusted in two ways, one way is that the direct current charging module is matched with CAN interface communication between external electric equipment, and the external electric equipment is charged after the communication is successful; the charging voltage and the charging current can be manually adjusted through a display interface connected with the direct current charging module, and then the external electric equipment is charged. The display interface can display information such as charging voltage, charging current, charging electric quantity, alarm record and the like.
When the charging device is used for charging the ground, an AC380V power supply is input, the second load isolating switch GLK2 is closed, and the second alternating current contactor coil KM2 is closed by closing the normally open two-position of the change-over switch SW (namely, the left side is closed in the figure 1) ’ The second alternating current contactor KM2 normally-open main contact is closed by electrifying (at the moment, the normally-closed auxiliary contact KM22 of the second alternating current contactor is disconnected), so that the direct current charging module is supplied with power (alternating current 380V is changed into adjustable direct current), and the direct current charging module is connected with external electric equipment and charges the electric equipment.
The utility model discloses a direct current module of charging is provided with one and charges mouthful or two mouthful of charging for connect one rifle or two guns that charge.
When the first AC contactor coil KM1 ’ When the power is on, the normally closed auxiliary contact KM11 of the first alternating current contactor is disconnected, and when the coil KM2 of the second alternating current contactor ’ When the power is supplied, the normally closed auxiliary contact KM22 of the second alternating current contactor is disconnected. The two sets can be electrically interlocked, i.e., the AC380V input power supply and the AC660V input power supply do not operate simultaneously. Therefore, when the downhole charging circuit is used for downhole charging, the first main circuit and the first control circuit work, and the first indicator lamp XD1 of the display circuit is lightened; when the second main loop and the second control loop work to display the second indication of the loop when the ground is chargedThe lamp XD2 is lit. The display circuit is used for indicating the working state of the mining explosion-proof charging device, namely indicating whether the charging is underground charging or ground charging or is in a non-working state.
The utility model provides a still including the first limit switch K1 and the second limit switch K2 that are connected among the first control circuit, the first limit switch K1 input of normally opening one of change over switch SW, second limit switch K2 input is connected to first limit switch K1 output, and second ac contactor's normally closed auxiliary contact KM22 input is connected to second limit switch K2 output. The utility model provides a still including the third limit switch K3 and the fourth limit switch K4 that are connected among the second control circuit, the normally open two-bit of change over switch SW connects third limit switch K3 input, and fourth limit switch K4 input is connected to third limit switch K3 output, and first ac contactor's normally closed auxiliary contact KM11 input is connected to fourth limit switch K4 output. The utility model provides a limit switch is relevant with the door on the explosion-proof box, and after the equipment door was closed, limit switch K1, K2, K3, K4 were closed for control circuit got electric, and charging device can normally work, and limit switch was in the off-state when the equipment door was in the open mode, made control circuit not got electric, and charging device can't normally work.
The utility model discloses a mining explosion-proof charging device is when having a problem or need the maintenance in the charging process, can directly break off load isolator. The utility model provides a fuse plays the short-circuit protection effect, can fuse disconnection circuit when the electric current is too high.
The utility model provides a direct current module of charging still is connected with starting switch ST and scram button EM, and when opening the starting switch ST, the direct current module of charging can charge for outside consumer, and the disconnection charges when closing. Under the normal working condition of the equipment, if an accident occurs, the whole charging device can stop working by pressing the emergency stop button EM.
The utility model also comprises a cooling system which can adopt different cooling modes, including two cooling modes of liquid cooling and air cooling; wherein liquid cooling mode: the circulating cooling liquid exchanges heat with heat generated by internal equipment of the explosion-proof box body through the cooling flow channel to realize cooling; air cooling mode: the heat generated by the internal equipment of the explosion-proof box body is exchanged with the external air through the radiating fins to realize cooling.
The utility model provides an explosion-proof box 1 is last to be equipped with glass window 10 and introducing device 11, and the last rubber circle explosion-proof face that reaches this introducing device of this glass window glass is scribbled electrically conductive lacquer for anti-electromagnetic interference.
The utility model discloses mining explosion-proof charging device's functional requirement:
charging control function
The utility model discloses a mining explosion-proof charging device possesses automatic charge control function, also can possess manual charge control function. When the charging device is controlled by manual charging, the charging device has obvious operation prompt information (a display interface connected with the direct-current charging module) and is only used by professionals for debugging or maintaining the charging device under special conditions.
Communication function
The charging device has a communication function with the mining electric equipment, such as a lithium battery power supply, and judges whether the charging device is correctly connected with a mining lithium battery power supply system; and acquiring charging parameters and charging real-time data of the lithium battery power supply for the mine. The communication protocol of the charging device and the mining lithium battery power supply is in accordance with the regulation of GB/T27930. The charging device preferably has a function of communicating with a superior monitoring system or an operation management system. The charging device is preferably provided with big data acquisition and uploading functions.
Insulation detection function
The charging device has the function of insulation detection of the direct current output loop, and the insulation detection function of the charging device is matched with the insulation detection function of the mining lithium battery power supply. The insulation detection function of the charging device should meet the requirements of B.4.1 and B.4.2 in GB/T18487.1-2015. The charging device should detect the outside voltage of the dc output contactor before performing insulation detection, and should stop the insulation detection process and issue warning information when the insulation resistance value exceeds a predetermined value.
DC output loop short circuit detection function
The charging device has the function of short-circuit detection on the direct current output circuit, the short-circuit detection of the charging device is carried out in an insulation detection stage, and when the direct current output circuit has a short-circuit fault, the charging process is stopped and warning information is sent out.
Pre-charge function
The charging device should have a pre-charging function. And starting a charging stage, and after a plug connector of the power supply of the mining electric equipment is closed, detecting the voltage of the battery by the charging device and judging whether the voltage is normal or not. When the charging device detects that the battery voltage is normal, the output voltage is adjusted to the value obtained by subtracting 1V-10V from the current battery voltage, and then the direct current output contactor at the charging device side is closed.
The charging device has a dual protection function on the battery power supply of the mining electric equipment, and when the output voltage is detected to be greater than the highest allowable total charging voltage of the battery power supply of the electric equipment or the output current is detected to be greater than the current required current of the battery power supply of the electric equipment in the charging process, the charging device is required to cut off the direct current output within 1s and send out warning information.
The utility model discloses a mining explosion-proof charging device can realize that the colliery is down with two different occasions on ground charge, when mining electric motor car takes place the electric quantity not enough, charges according to the environmental place flexibility of locating, has improved work efficiency. And simultaneously the utility model discloses mining explosion-proof charging device can adopt the double gun to charge, has reduced the charge time.
In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, and unless otherwise specifically limited, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description of the present invention, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In the present disclosure, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (13)

1. A mining explosion-proof charging device is characterized by comprising an explosion-proof box body and a charging circuit arranged in the explosion-proof box body, wherein the charging circuit comprises a main loop, a control loop and a direct current charging module, the control loop and the direct current charging module are respectively connected with the main loop, and the direct current charging module is connected with external electric equipment; the main loop is externally connected with two input power supplies which are respectively used for underground charging and ground charging, and the control loop controls the main loop to charge the electric equipment through the direct current charging module.
2. The mining explosion-proof charging device of claim 1, wherein the primary circuit comprises a first primary circuit and a second primary circuit, the first primary circuit connects one of the two input power sources for downhole charging, and the second primary circuit connects the other of the two input power sources for surface charging; the control loop comprises a first control loop connected with the first main loop and a second control loop connected with the second main loop.
3. The mining explosion-proof charging device according to claim 2, wherein the first main loop comprises an input end, a first load isolation switch, a first fuse, a transformer and a first ac contactor, the input end is connected with one end of the first load isolation switch through a connecting terminal, the other end of the first load isolation switch is connected with the input side of the transformer through the first fuse, the output side of the transformer is connected with the normally open main contact input end of the first ac contactor, the normally open main contact output end of the first ac contactor is connected with the input end of the dc charging module, and the output end of the dc charging module is connected with external electric equipment.
4. The mining explosion-proof charging device according to claim 3, wherein the second main circuit comprises an input end, a second load isolating switch, a second fuse and a second AC contactor, the input end of the second main circuit is connected with one end of the second load isolating switch through a wiring terminal, the other end of the second load isolating switch is connected with the normally open main contact input end of the second AC contactor through the second fuse, and the normally open main contact output end of the second AC contactor is connected with the input end of the DC charging module.
5. The mining explosion-proof charging device of any one of claims 2 to 4, wherein the input power supply connected with the first main loop is AC660V input voltage, and the input power supply connected with the second main loop is AC380V input voltage.
6. The mining explosion-proof charging device of claim 3, wherein the voltage of the input side of the transformer is AC660V, and the voltage of the output side of the transformer is AC380V.
7. The mining explosion-proof charging device according to claim 4, wherein the first control circuit comprises a first air switch, a transfer switch, a normally closed auxiliary contact of a second AC contactor and a first AC contactor coil, the output side of the transformer is connected with the input side of the first air switch, one end of the output side of the first air switch is connected with a normally open bit of the transfer switch, the normally open bit of the transfer switch is connected with the normally closed auxiliary contact input end of the second AC contactor, the normally closed auxiliary contact output end of the second AC contactor is connected with one end of the first AC contactor coil, and the other end of the first AC contactor coil is connected with the other end of the output side of the first air switch.
8. The mining explosion-proof charging device according to claim 7, wherein the second control loop comprises a second air switch, the transfer switch, the normally closed auxiliary contact of the first ac contactor, and a second ac contactor coil, the output end of the second load isolation switch is connected to the input side of the second air switch, one end of the output side of the second air switch is connected to the normally open two position of the transfer switch, the normally open two position of the transfer switch is connected to the normally closed auxiliary contact input end of the first ac contactor, the normally closed auxiliary contact output end of the first ac contactor is connected to one end of the second ac contactor coil, and the other end of the second ac contactor coil is connected to the other end of the output side of the second air switch.
9. The mining explosion-proof charging device according to claim 8, wherein the first control loop comprises a first limit switch and a second limit switch which are connected, a normally open bit of the transfer switch is connected with an input end of the first limit switch, an output end of the first limit switch is connected with an input end of the second limit switch, and an output end of the second limit switch is connected with an input end of a normally closed auxiliary contact of the second alternating current contactor; the second control loop comprises a third limit switch and a fourth limit switch which are connected, the normally open two position of the change-over switch is connected with the input end of the third limit switch, the output end of the third limit switch is connected with the input end of the fourth limit switch, and the output end of the fourth limit switch is connected with the input end of the normally closed auxiliary contact of the first alternating current contactor.
10. The mining explosion-proof charging device of claim 2, wherein the mining explosion-proof charging device comprises a display circuit, the display circuit comprises a first display circuit connected with the first main circuit and a second display circuit connected with the second main circuit, and each display circuit comprises an indicator light and an air switch which are connected with each other.
11. The mining explosion-proof charging device according to claim 1, wherein the direct current charging module is provided with one charging port or two charging ports for connecting one explosion-proof charging gun or two explosion-proof charging guns.
12. The mining explosion-proof charging device according to claim 1, wherein the direct current charging module is connected with a starting switch and an emergency stop button.
13. An explosion-proof charging device for mine use as claimed in claim 1, wherein said explosion-proof box body is provided with a glass window and a lead-in device, and the glass window and the explosion-proof surface of the rubber ring of the lead-in device are coated with conductive paint for resisting electromagnetic interference.
CN202222006908.6U 2022-08-01 2022-08-01 Mining explosion-proof charging device Active CN217863745U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202222006908.6U CN217863745U (en) 2022-08-01 2022-08-01 Mining explosion-proof charging device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202222006908.6U CN217863745U (en) 2022-08-01 2022-08-01 Mining explosion-proof charging device

Publications (1)

Publication Number Publication Date
CN217863745U true CN217863745U (en) 2022-11-22

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Country Status (1)

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