Explosion-proof handle for controlling underground coal mine electric vehicle
By designing an explosion-proof operating handle device for electric vehicles underground in coal mines, the problem of low versatility of handles in the prior art is solved, safe and reliable operation in explosion-hazardous environments are achieved, and the versatility of the system is improved.
Patent Information
- Application Number
- CN202411922640.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2025-03-18
AI Technical Summary
Although the control handles of existing underground electric vehicles of coal mines meet safety requirements in explosive environments, they are not very versatile and require the design and testing of related circuits of external electrical systems.
An explosion-proof operating handle device is designed, consisting of an explosion-proof shell, explosion-proof wiring terminal, an intrinsic safety button and display light, an intrinsic safety power supply, a control module and an isolation module. The electrical isolation is achieved through the explosion-proof partition and the explosion-proof communication section to ensure safe and reliable operation in an explosion-hazardous environment.
The device can operate safely in an underground explosion hazard environment, and due to its versatile electrical device design, it can be directly connected to the explosion-proof electrical system of the electric vehicle without additional correlation design and testing, improving the versatility and safety of the system.
Smart Images
Figure CN119653648A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of coal mine automation, in particular to an explosion-proof operating handle device for controlling electric vehicles underground in coal mines. Background Art
[0002] Electric engineering vehicles in coal mines work on auxiliary transport working surfaces and are in an explosive gas hazardous environment. Since there are often flammable gases such as gas and CO underground, which may cause underground explosion hazards, electrical equipment in this explosive hazardous environment is required to meet intrinsic safety or flameproof and explosion-resistant requirements.
[0003] At present, the control handles of electric vehicles in coal mines are the operating handles of the ground engineering machinery industry, and the explosion-proof type is intrinsically safe. The characteristic of intrinsically safe electrical equipment is that the electric sparks that may be generated by the connecting wires inside the equipment and exposed to the explosive environment are limited to a level that cannot produce ignition, that is, the equipment itself and the exposed wires do not have the energy to ignite sparks.
[0004] The explosion-proof type of the intrinsically safe operating handle meets the safety requirements of explosion, and the sparks generated by itself will not ignite explosive gases. However, since the electronic components in the intrinsically safe circuit of the operating handle will be superimposed with the components of its external system to generate the energy of igniting sparks, when the intrinsically safe operating handle is used, it cannot be directly connected to the electrical control system of the whole vehicle. This means that when the handle is connected to the system, it is necessary to design the associated circuits of the electrical system outside the intrinsically safe operating handle and conduct associated tests on the related circuits. This feature limits the versatility of the intrinsically safe handle. Summary of the invention
[0005] In order to solve the problem that the existing intrinsically safe handle mentioned in the background technology meets the safety requirements but has low versatility, the present invention provides an explosion-proof operating handle device for controlling electric vehicles in coal mines.
[0006] The present invention adopts the following technical scheme: an explosion-proof handle for controlling an electric vehicle in a coal mine, comprising: An explosion-proof housing, the explosion-proof housing comprising: a first explosion-proof chamber and a second explosion-proof chamber, an explosion-proof partition is arranged between the first explosion-proof chamber and the second explosion-proof chamber, the second explosion-proof chamber is connected to an explosion-proof cable access device through an explosion-proof connecting joint, and an explosion-proof cable is installed in the explosion-proof cable access device; An intrinsically safe button and an intrinsically safe indicator light are installed on the first explosion-proof cavity; The second explosion-proof chamber is equipped with an intrinsically safe power supply, a power supply, a control module, a first isolation module, and a second isolation module; An explosion-proof terminal block is installed on the explosion-proof partition plate and is used to connect cables in the first explosion-proof cavity and the second explosion-proof cavity.
[0007] In some embodiments, the explosion-proof partition has an explosion-proof through hole for installing an explosion-proof terminal block; the joining surface between the explosion-proof through hole and the explosion-proof terminal block is a first explosion-proof joining surface, which prevents the explosion from propagating between the first explosion-proof cavity and the second explosion-proof cavity.
[0008] In some embodiments, the explosion-proof terminal block includes: An insulating washer and a terminal block, the insulating washer is arranged on the first explosion-proof cavity side, the terminal block is arranged on the second explosion-proof cavity side, through holes are symmetrically arranged between the insulating washer and the terminal block, a copper rod is passed through the through hole, both ends of the copper rod are fastened by a fastener group and connected to the cables at both ends; the contact surface between the outer side of the copper rod and the insulating washer and the terminal block is the second explosion-proof joint surface, and the threaded joint part of the fastener group and the copper rod is the third explosion-proof joint surface, which prevents the explosion from propagating between the first explosion-proof cavity and the second explosion-proof cavity.
[0009] In some embodiments, the insulating gasket and the terminal block are made of dimethyl carbonate.
[0010] In some embodiments, the explosion-proof cable entry device comprises: The compression nut is tightened in the explosion-proof connecting joint and the explosion-proof connecting joint is sealed by a gasket and a sealing rubber ring; a through hole is opened on the compression nut for allowing the explosion-proof cable to pass through.
[0011] In some embodiments, the intrinsically safe power supply provides power for the intrinsically safe side of the first isolation module and the second isolation module; the power supply provides power for the dangerous side of the first isolation module and the second isolation module; the control module analyzes and determines the input signal of the intrinsically safe button through the first isolation module and then controls the intrinsically safe display light through the second isolation module.
[0012] In some embodiments, a switch input group, a switch output group and a communication port are set on the control module, and the control signal outputs a given state to a dangerous environment in three ways. The first way is through the dangerous side output of the first isolation module, the second way is through the switch output terminal of the control module, and the third way is through the communication port of the control module.
[0013] In some embodiments, the first isolation module includes a photocoupler, a dip switch and a first resistor row connected in series in sequence, the base of the photocoupler is the intrinsically safe side, and the collector and the emitter are the dangerous sides; the first resistor connects the intrinsically safe button and the base of the photocoupler; the base current of the photocoupler is further adjusted by adjusting the series and parallel connection of the first resistor row by turning on and off the dip switch; the emitter of the photocoupler is connected to the input terminal of the control module.
[0014] In some embodiments, the second isolation module includes a photocoupler, a dip switch and a second resistor row connected in series in sequence, wherein the base of the photocoupler is a dangerous side, and the collector and the emitter are intrinsically safe sides; the output current of the photocoupler is further adjusted by adjusting the series and parallel connection of the second resistor row by turning on and off the dip switch.
[0015] Compared with the prior art, the present invention consists of an explosion-proof casing, explosion-proof wiring terminals, intrinsically safe buttons, intrinsically safe display lights, intrinsically safe power supplies, power supplies, control modules, a first isolation module, a second isolation module and an explosion-proof cable access device, and can be used in underground explosion-hazardous environments.
[0016] The invention has the advantage that the product can be directly connected to the explosion-proof electrical system of an electric vehicle as a universal electrical component, without the need for intrinsic safety related design and related testing when the product is connected to the system. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a schematic diagram of the explosion-proof handle structure used for electric vehicles in coal mines; Figure 2 It is a schematic diagram of the structure of the explosion-proof handle middle partition and explosion-proof terminal; Figure 3 It is a schematic diagram of the structure of the explosion-proof interconnecting joint and the cable access device; Figure 4 This is the electrical diagram for the explosion-proof handle; In the figure: 1-explosion-proof housing, 2-explosion-proof terminal block, 3-intrinsically safe button, 4-intrinsically safe indicator light, 5-intrinsically safe power supply, 6-power supply, 7-control module, 8-first isolation module, 9-second isolation module, 10-explosion-proof cable access device, 11-explosion-proof cable, 1-1-first explosion-proof cavity, 1-2-second explosion-proof cavity, 1-3-explosion-proof partition, 1-3-1-first explosion-proof joint surface, 1-4-explosion-proof connecting joint, 2-1-insulating gasket, 2 -2-terminal block, 2-3-copper rod, 2-4-fastener group, 2-5-second explosion-proof joint surface, 2-6-third explosion-proof joint surface, 7-1-switch input group, 7-2-switch output group, 7-3-communication port, 8-1-photoelectric coupler, 8-2-dip switch, 8-3-first resistor row, 9-1-photoelectric coupler, 9-2-dip switch, 9-3-second resistor row, 10-1-tightening nut, 10-2-sealing rubber ring, 10-3-washer. DETAILED DESCRIPTION
[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0019] See also Figure 1-Figure 4 In an embodiment of the present invention, an explosion-proof handle for an electric vehicle in an underground coal mine includes an explosion-proof housing 1, an explosion-proof terminal 2, an intrinsically safe button 3, an intrinsically safe display light 4, an intrinsically safe power supply 5, a power supply 6, a control module 7, a first isolation module 8, a second isolation module 9 and an explosion-proof cable access device 10.
[0020] The explosion-proof housing includes a first explosion-proof chamber 1-1, a second explosion-proof chamber 1-2, an explosion-proof partition 1-3 and an explosion-proof connecting section 1-4.
[0021] The first explosion-proof chamber 1-1 is an intrinsically safe chamber, and the second explosion-proof chamber 1-2 is a flameproof chamber. The first explosion-proof chamber 1-1 and the second explosion-proof chamber 1-2 are electrically isolated by an explosion-proof partition 1-3 and an explosion-proof terminal 2.
[0022] The explosion-proof partition 1-3 has an explosion-proof through hole for installing the explosion-proof terminal 2. The joint surface between the explosion-proof through hole and the explosion-proof terminal is the first explosion-proof joint surface 1-3-1, which prevents the explosion from propagating between the first explosion-proof cavity 1-1 and the second explosion-proof cavity 1-2. The partition has a pin hole 1-3-2 to prevent the terminal from axially loosening.
[0023] The explosion-proof terminal 2 includes an insulating washer 2-1, a terminal block 2-2, a copper rod 2-3, and a fastener group 2-4. The insulating washer 2-1 and the terminal block 2-2 are made of dimethyl carbonate, which meets the requirements of explosion resistance and non-explosion transmission. The copper rod 2-3 passes through the insulating washer 2-1 and the terminal block 2-2. The fastener group 2-4 is used to fasten the insulating washer 2-1 and the terminal block 2-2. The contact surface between the outer side of the copper rod 2-3 and the insulating washer 2-1) and the terminal block 2-2 is the second explosion-proof joint surface 2-5, and the threaded joint part of the fastener group 2-4 and the copper rod 2-3 is the third explosion-proof joint surface 2-6, which prevents the explosion from propagating between the first explosion-proof cavity 1-1 and the second explosion-proof cavity 1-2.
[0024] The explosion-proof connecting section 1 - 4 and the explosion-proof cable access device 10 are located in the second explosion-proof cavity 1 - 2 , wherein the explosion-proof connecting section 1 - 4 is welded on the explosion-proof housing 1 .
[0025] The explosion-proof cable access device 10 includes a compression nut 10-1, a sealing rubber ring 10-2 and a washer 10-3. The compression nut 10-1, the sealing rubber ring 10-2 and the explosion-proof connecting joint 1-4 are fastened by threads, and the sealing rubber ring 10-2 is made of nitrile rubber. The sealing rubber ring 10-2 is installed between the explosion-proof connecting joint 1-4 and the compression nut 10-1, and the sealing rubber ring 10-2 is compressed by the washer 10-3.
[0026] The explosion-proof cable 11 passes through the compression nut 10-1, the sealing rubber ring 10-2, the washer 10-3 and the explosion-proof connecting joint 1-4 from the dangerous environment and then enters the second explosion-proof cavity 1-2.
[0027] One end of the explosion-proof terminal 2 is connected to the intrinsically safe button 2 and the intrinsically safe display light 3 in the first explosion-proof cavity 1-1, and the other end is connected to the intrinsically safe side of the first isolation module 8 and the second isolation module 9 in the second explosion-proof cavity 1-2.
[0028] The intrinsically safe button 3 and the intrinsically safe indicator light 4 are located in the first explosion-proof chamber 1 - 1 .
[0029] The intrinsically safe indicator light (4) is located on the intrinsically safe button 3 and is composed of a light emitting diode and a resistor.
[0030] The intrinsically safe power supply 5, the power supply 6, the control module 7, the first isolation module 8 and the second isolation module 9 are located in the second explosion-proof chamber 1-2.
[0031] The intrinsically safe power supply 5 provides power for the intrinsically safe side of the first isolation module 8 and the second isolation module 9; the power supply 6 provides power for the dangerous side of the first isolation module 8 and the second isolation module 9; the control module 7 analyzes and judges the input signal of the intrinsically safe button 4 through the first isolation module 8 and then controls the intrinsically safe display light 3 through the second isolation module 9.
[0032] The control module 7 includes a switch input group 7-1, a switch output group 7-2 and a communication port 7-3.
[0033] The control signal of the explosion-proof and intrinsically safe handle can output a given state to a hazardous environment in three ways. The first way is through the dangerous side output of the first isolation module 8, the second way is through the switch output terminal 7-2 of the control module 7, and the third way is through the communication port 7-3 of the control module 7.
[0034] The first isolation module 8 includes a photocoupler 8-1, a dial switch 8-2, and a first resistor row 8-3. The base of the photocoupler 8-1 is the intrinsically safe side, and the collector and emitter are the dangerous side. The first resistor 8-3 connects the intrinsically safe button 3 and the base of the photocoupler 8-1. The base current of the photocoupler 8-1 is further adjusted by adjusting the series and parallel connection of the first resistor row 8-3 by turning on and off the dial switch 8-2. The emitter of the photocoupler 8 is connected to the input terminal of the control module 7.
[0035] The second isolation module 9 includes a photoelectric coupler 9-1, a code switch 9-2, and a second resistor row 9-3. The base of the photoelectric coupler 8-1 is the dangerous side, and the collector and emitter are the intrinsically safe side. The output current of the photoelectric coupler 9-1 is further adjusted by adjusting the series connection and parallel connection of the second resistor row 9-3 through the on and off of the code switch 9-2.
[0036] In summary, the present invention communicates with the outside through the explosion-proof and waterproof cable access device to transfer parameters through the mining shielded communication cable, completes human-computer interaction with the outside world through the magnetic switch, and the display area of the display module is connected to the outside world after passing through the explosion-proof and waterproof mechanism. The explosion-proof and waterproof cable access device meets both the explosion-proof requirements and the high protection level waterproof and dustproof requirements. The explosion-proof and waterproof mechanism used for the display module meets both the explosion-proof requirements and the high protection level waterproof and dustproof requirements.
[0037] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.
[0038] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
Claims
1. An explosion-proof handle for controlling electric vehicles in coal mines, characterized in that: include: An explosion-proof housing (1), the explosion-proof housing (1) comprising: A first explosion-proof chamber (1-1) and a second explosion-proof chamber (1-2), an explosion-proof partition (1-3) being arranged between the first explosion-proof chamber (1-1) and the second explosion-proof chamber (1-2), the second explosion-proof chamber (1-2) being connected to an explosion-proof cable access device (10) via an explosion-proof connecting joint (1-4), and an explosion-proof cable (11) being installed in the explosion-proof cable access device (10); An intrinsically safe button (3) and an intrinsically safe indicator light (4) are installed on the first explosion-proof chamber (1-1); An intrinsically safe power supply (5), a power supply (6), a control module (7), a first isolation module (8) and a second isolation module (9) are installed in the second explosion-proof chamber (1-2); An explosion-proof terminal block (2) is installed on the explosion-proof partition plate (1-3) and is used to connect cables in the first explosion-proof chamber (1-1) and the second explosion-proof chamber (1-2).
2. The explosion-proof handle for controlling electric vehicles in coal mines according to claim 1, characterized in that: The explosion-proof partition (1-3) is provided with an explosion-proof through hole for installing an explosion-proof terminal block (2); the joint surface between the explosion-proof through hole and the explosion-proof terminal block is a first explosion-proof joint surface (1-3-1), which prevents the explosion from propagating between the first explosion-proof cavity (1-1) and the second explosion-proof cavity (1-2).
3. The explosion-proof handle for controlling electric vehicles in coal mines according to claim 2, characterized in that: The explosion-proof terminal block (2) comprises: An insulating washer (2-1) and a terminal block (2-2), wherein the insulating washer (2-1) is arranged on the side of a first explosion-proof cavity (1-1), and the terminal block (2-2) is arranged on the side of a second explosion-proof cavity (1-2); through holes are symmetrically arranged between the insulating washer (2-1) and the terminal block (2-2); a copper rod (2-3) is passed through the through hole; both ends of the copper rod (2-3) are fastened by a fastener group (2-4) and connected to cables at both ends; the contact surface between the outer side of the copper rod (2-3) and the insulating washer (2-1) and the terminal block (2-2) is a second explosion-proof joint surface (2-5); and the threaded joint portion between the fastener group (2-4) and the copper rod (2-3) is a third explosion-proof joint surface (2-6), which prevents the explosion from propagating between the first explosion-proof cavity (1-1) and the second explosion-proof cavity (1-2).
4. The explosion-proof handle for controlling electric vehicles in coal mines according to claim 3, characterized in that: The insulating gasket (2-1) and the terminal block (2-2) are made of dimethyl carbonate.
5. The explosion-proof handle for controlling electric vehicles in coal mines according to claim 1, characterized in that: The explosion-proof cable access device (10) comprises: A compression nut (10-1) is tightened in the explosion-proof connecting joint (1-4) and seals the explosion-proof connecting joint (1-4) via a gasket (10-3) and a sealing rubber ring (10-2); a through hole is formed in the compression nut (10-1) for allowing the explosion-proof cable (11) to pass through.
6. The explosion-proof handle for controlling electric vehicles in coal mines according to claim 1, characterized in that: The intrinsically safe power supply (5) provides power for the intrinsically safe side of the first isolation module (8) and the second isolation module (9); the power supply (6) provides power for the dangerous side of the first isolation module (8) and the second isolation module (9); the control module (7) controls the intrinsically safe display light (3) after analyzing and judging the input signal of the intrinsically safe key (4) through the first isolation module (8) and then through the second isolation module (9).
7. The explosion-proof handle for controlling electric vehicles in coal mines according to claim 6, characterized in that: The control module (7) is provided with a switch input group (7-1), a switch output group (7-2) and a communication port (7-3), and the control signal outputs a given state to a dangerous environment in three ways: a first way is output through the dangerous side of the first isolation module (8), a second way is output through the switch output terminal (7-2) of the control module (7), and a third way is output through the communication port (7-3) of the control module (7).
8. The explosion-proof handle for controlling electric vehicles in coal mines according to claim 7, characterized in that: The first isolation module (8) comprises a photoelectric coupler (8-1), a dip switch (8-2) and a first resistor row (8-3) connected in series in sequence, the base of the photoelectric coupler (8-1) being the intrinsically safe side, and the collector and emitter being the dangerous side; the first resistor (8-3) being connected to the intrinsically safe button (3) and the base of the photoelectric coupler (8-1); the base current of the photoelectric coupler (8-1) being further adjusted by adjusting the series connection and parallel connection of the first resistor row (8-3) by turning the dip switch (8-2) on and off; and the emitter of the photoelectric coupler (8) being connected to an input terminal of the control module (7).
9. The explosion-proof handle for controlling electric vehicles in coal mines according to claim 8, characterized in that: The second isolation module (9) comprises a photoelectric coupler (9-1), a dip switch (9-2) and a second resistor row (9-3) connected in series in sequence, the base of the photoelectric coupler (9-1) being the dangerous side, and the collector and the emitter being the intrinsically safe side; the output current of the photoelectric coupler (9-1) is further adjusted by adjusting the series connection and parallel connection of the second resistor row (9-3) by turning the dip switch (9-2) on and off.