Mining flame-proof dual-power change-over switch

Abstract

The utility model discloses a mining flame-proof dual-power change-over switch, which is characterized in that a cavity comprises a wire inlet cavity, a wire outlet cavity and a change-over switch cavity, and a rear cover comprises a wire inlet cavity rear cover, a wire outlet cavity rear cover and a switch cavity rear cover; the switch is characterized in that the rear cover is installed above the cavity, the rear cover of the wire inlet cavity and the rear cover of the wire outlet cavity are connected through an anti-drop bolt, a dual-power automatic switcher, a fuse and a combined switch are arranged in the change-over switch cavity, and the wire inlet cavity and the wire outlet cavity are respectively provided with a cable access port. The beneficial effects of the utility model are that by adopting the above technical scheme, the 127V main / standby power supply can supply power, and when the main power supply is powered off, the standby power supply can continue to supply power without affecting the load work. The product is small in size, user safety inspection is convenient during disassembly, and the bolt is prevented from being lost. Explosion-proof sub-cavity design is adopted among the cavities, and explosion-proof design is adopted between the cavities and the external environment. The change-over switch cavity is provided with a fuse and a combination switch, the fuse can carry out overcurrent protection, and the combination switch can control on-off of output electricity.

Description

Technical Field

[0001] This utility model relates to the field of explosion-proof switches, specifically to a mining explosion-proof dual power supply switching switch. Background Technology

[0002] Explosion-proof dual-power transfer switches for coal mines are suitable for use in special locations where power outages are not possible and in underground coal mine environments where there is a risk of gas or coal dust explosions.

[0003] In existing technologies, when operators disassemble and install explosion-proof switches, the bolts, spring washers, and flat washers on the back cover are easily detached and lost, resulting in missing fasteners. This greatly reduces the efficiency of personnel installation and disassembly. Furthermore, existing products are only applicable to voltages above 380V, lack overcurrent protection, cannot control the on / off state of the downstream power supply, have a large switch size, and the outer casing is made of steel plate splicing and welding process, resulting in numerous welds. Utility Model Content

[0004] The purpose of this invention is to solve the above problems by providing a mine-use explosion-proof dual power supply switching switch.

[0005] The present invention adopts the following technical solution:

[0006] A mine-use explosion-proof dual-power transfer switch includes a rear cover and a cavity. The cavity is manufactured using a bending and welding process. The key features are: the rear cover of the inlet cavity is installed above the inlet cavity and connected by anti-loosening bolts; an inlet cavity sealing ring is provided between the rear cover and the inlet cavity; the rear cover of the outlet cavity is installed above the outlet cavity and connected by anti-loosening bolts; an outlet cavity sealing ring is provided between the rear cover and the outlet cavity; the rear cover of the switch cavity is installed above the transfer switch cavity and connected by ordinary bolts; the inlet cavity has terminals; the outlet cavity has terminals; a through-wall terminal is provided between the inlet cavity and the transfer switch cavity; the transfer switch cavity contains a fuse, a dual-power automatic transfer switch, and a combination switch; the inlet cavity has a cable inlet; the outlet cavity has a cable inlet; and the cable inlet contains a cable sealing ring, a baffle, a washer, and a clamping nut.

[0007] Preferably, the cavity is constructed using a bending and welding process.

[0008] Preferably, an inlet cavity sealing ring is provided between the inlet cavity rear cover and the inlet cavity.

[0009] Preferably, a cable outlet sealing ring is provided between the cable outlet cavity rear cover and the cable outlet cavity.

[0010] Preferably, a switching chamber sealing ring is provided between the back cover of the switching chamber and the switching chamber.

[0011] Preferably, the inlet cavity rear cover and the inlet cavity are connected by anti-loosening bolts.

[0012] Preferably, the rear cover of the cable outlet cavity and the cable outlet cavity are connected by anti-detachment bolts.

[0013] Preferably, the switching chamber is equipped with a fuse, a dual-power automatic switch, and a combination switch.

[0014] Preferably, the inlet cavity and the switching cavity are provided with through-wall terminals.

[0015] Preferably, the outlet cavity and the switching cavity are provided with through-wall terminals.

[0016] The beneficial effects of this utility model are:

[0017] By adopting the above technical solutions, the fastening bolts can be prevented from falling off or being lost during safety inspection and disassembly of the switch. The operation is convenient and the efficiency is improved. The product shell adopts a bending and welding process to reduce the number of welds. The product is small in size and easy to transport and install. It is equipped with overcurrent protection to improve the switch life. The output power can be disconnected for convenient load operation. It adopts an explosion-proof design and is suitable for underground coal mines. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the device introduced by this utility model.

[0019] Figure 2 This is a top view of the internal structure of this utility model.

[0020] Figure 3 This is a top view of the entire utility model.

[0021] Figure 4 This is a schematic diagram of the overall design of this utility model.

[0022] In the diagram: 1. Rear cover of inlet cavity; 2. Rear cover of outlet cavity; 3. Rear cover of switch cavity; 4. Inlet cavity; 5. Outlet cavity; 6. Switching switch cavity; 7. Through-wall terminal; 8. Fuse; 9. Dual power automatic switch; 10. Combination switch; 11. Wiring terminal; 12. Compression nut; 13. Washer; 14. Baffle; 15. Cable sealing ring; 16. Anti-loosening bolt; 17. Sealing ring of inlet cavity; 18. Sealing ring of outlet cavity; 19. Sealing ring of switching switch cavity. Detailed Implementation

[0023] The following embodiments are intended to enable those skilled in the art to gain a more comprehensive understanding of the present invention, but do not limit the present invention in any way.

[0024] like Figure 1 - Figure 3As shown, a mine-use explosion-proof dual-power transfer switch includes an inlet chamber rear cover 1, an outlet chamber rear cover 2, a switch chamber rear cover 3, an inlet chamber 4, an outlet chamber 5, and a transfer switch chamber 6. The inlet chamber rear cover 1 is installed above the inlet chamber 4 and connected by anti-detachment bolts 16; an inlet chamber sealing ring 17 is provided between the inlet chamber rear cover 1 and the inlet chamber 4. The outlet chamber rear cover 2 is installed above the outlet chamber 5 and connected by anti-detachment bolts 16; an outlet chamber sealing ring 18 is provided between the outlet chamber rear cover 2 and the outlet chamber 5. The switch chamber rear cover 3 is installed above the transfer switch chamber 6. Above the closing cavity 6, a common bolt is used for connection. The inlet cavity 4 is provided with a terminal block 11, and the outlet cavity 5 is provided with a terminal block 11. A through-wall terminal 7 is provided between the inlet cavity 4 and the switching cavity 6, and between the outlet cavity 5 and the switching cavity 6. The switching cavity 6 is provided with a fuse 8, a dual power automatic switch 9, and a combination switch 10. The inlet cavity 4 is provided with a cable inlet, and the outlet cavity 5 is provided with a cable inlet. The cable inlet is provided with a cable sealing ring 15, a baffle 14, a washer 13, and a clamping nut 12.

[0025] In this embodiment, the cavity is constructed using a bending and welding process.

[0026] In this embodiment, an inlet cavity sealing ring 17 is provided between the inlet cavity rear cover 1 and the inlet cavity 4.

[0027] In this embodiment, a cable outlet sealing ring 18 is provided between the cable outlet cavity rear cover 2 and the cable outlet cavity 5.

[0028] In this embodiment, a switching chamber sealing ring 19 is provided between the switch chamber rear cover 3 and the switching chamber 6.

[0029] In this embodiment, the inlet cavity rear cover 1 and the inlet cavity 4 are connected by anti-detachment bolts 16.

[0030] In this embodiment, the rear cover 2 of the cable outlet cavity and the cable outlet cavity 5 are connected by anti-detachment bolts 16.

[0031] In this embodiment, the switching chamber is equipped with a fuse 8, a dual power supply automatic switch 9, and a combination switch 10.

[0032] In this embodiment, a through-wall terminal 7 is provided between the incoming line cavity 4 and the switching cavity 6.

[0033] In this embodiment, a through-wall terminal 7 is provided between the outgoing cable cavity 5 and the switching cavity 6.

[0034] The working principle of this utility model is as follows:

[0035] This product features an explosion-proof design, making it suitable for both industrial and mining applications. It prevents the fastening bolts from falling off or being lost during switch assembly and disassembly, ensuring convenient operation and improved efficiency. The product casing utilizes a pre-bending and then welding process, reducing the number of welds and resulting in a compact and easily transportable product. The switch incorporates overcurrent protection, extending product lifespan, and allows for controllable output power supply for convenient load operation.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0037] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A mine-use explosion-proof dual-power transfer switch, comprising an inlet cavity rear cover (1), an outlet cavity rear cover (2), a switch cavity rear cover (3), an inlet cavity (4), an outlet cavity (5), and a transfer switch cavity (6); characterized in that, The inlet cavity rear cover (1) is installed above the inlet cavity (4) and connected by anti-detachment bolts (16). The outlet cavity rear cover (2) is installed above the outlet cavity (5) and connected by anti-detachment bolts (16). The switch cavity rear cover (3) is installed above the switching switch cavity (6). The inlet cavity (4) and outlet cavity (5) are provided with wiring terminals (11). The switching switch cavity (6) is provided with fuses (8), dual power automatic switchers (9), and combination switches (10). The inlet cavity (4) and switching switch cavity (6) are provided with through-wall terminals (7). The outlet cavity (5) and switching switch cavity (6) are provided with through-wall terminals (7). The inlet cavity (4) and outlet cavity (5) are provided with cable sealing rings (15), baffles (14), washers (13), and clamping nuts (12).

2. The mine explosion-proof dual power supply switch according to claim 1, characterized in that, A cable inlet sealing ring (17) is provided between the cable inlet cavity rear cover (1) and the cable inlet cavity (4).

3. The mine explosion-proof dual power supply switch according to claim 1, characterized in that, A cable outlet sealing ring (18) is provided between the cable outlet rear cover (2) and the cable outlet (5).

4. The mine explosion-proof dual power supply switch according to claim 1, characterized in that, A switching chamber sealing ring (19) is provided between the back cover (3) of the switching chamber and the switching chamber (6).

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