阅读说明：本技术 一种防爆电气设备防止带电开盖的保护方法 (Protection method for preventing electrified uncovering of explosion-proof electrical equipment ) 是由 李孝杰 于 2021-04-22 设计创作，主要内容包括：本发明涉及一种防爆电气设备防止带电开盖的保护方法,电源接线腔、电缆接线盒设有双盖保护措施,这种双盖是非磁性金属材料,如：不锈钢、铜等物质。在第一层非磁性金属材料内部设有强磁性永久磁铁(1),在第二层非磁性金属盖板(2)的下面设有磁性传感器(3),第二层非磁性金属盖板(2)还起隔爆作用。要想打开第二层非磁性金属盖板(2),必须先移开带有强磁性磁铁的第一层盖板(1),当移走强磁性永久磁铁(1)后,磁性传感器(3)的常开接点接通跳闸保护电路,通过专用跳闸回路断开电源。(The invention relates to a protection method for preventing an explosion-proof electrical device from being opened in an electrified way, a power supply wiring cavity and a cable junction box are provided with double-cover protection measures, and the double covers are made of non-magnetic metal materials, such as: stainless steel, copper, etc. The first layer of non-magnetic metal material is internally provided with a strong magnetic permanent magnet (1), the second layer of non-magnetic metal cover plate (2) is provided with a magnetic sensor (3) below, and the second layer of non-magnetic metal cover plate (2) also plays a role in explosion suppression. In order to open the second layer non-magnetic metal cover plate (2), the first layer cover plate (1) with the strong magnetic magnet is removed, when the strong magnetic permanent magnet (1) is removed, the normally open contact of the magnetic sensor (3) is connected with a tripping protection circuit, and the power supply is disconnected through a special tripping loop.)

1. A protection method for preventing an explosion-proof electrical device from being opened in an electrified way is characterized by comprising the following steps: the invention is provided with double-cover protection measures in the power supply wiring cavity and the cable wiring box, and the double covers are made of non-magnetic metal materials such as stainless steel, copper and the like; a ferromagnetic permanent magnet (2) is arranged in the nonmagnetic metal material (1) of the first layer cover, and a magnetic sensor (4) is arranged under the nonmagnetic metal cover plate (3) of the second layer cover.

2. The method for protecting explosion-proof electrical equipment from being opened with electricity as claimed in claim 1, wherein the method comprises the following steps: in order to open the second layer of non-magnetic metal cover plate (3), the cover plate of the first layer with the strong magnetic magnet is removed, namely the strong magnetic permanent magnet (2) is removed, when the strong magnetic permanent magnet (2) is removed, the normally open contact of the magnetic sensor (4) is connected with a trip protection circuit, and the power supply is disconnected through a special trip circuit.

Technical Field

The invention relates to a protection method for preventing an explosion-proof electrical device from being opened in an electrified way, which belongs to the field of electrical explosion prevention and is suitable for the explosion-proof electrical device used in flammable and explosive places such as mines, chemical engineering and the like.

Technical Field

At present, a power supply wiring cavity and a cable junction box of explosion-proof electrical equipment can be opened in a non-power-off state, and no explosion-proof protection measures are provided. The illegal live-line cover opening can cause arc short circuit and even gas explosion accidents.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide the explosion-proof cable junction box cover plate and the upper cover for preventing the electrical equipment from being opened in a violation of power supply mode, and if the violation of power supply operation behavior occurs, the upper power supply is automatically powered off before the explosion-proof performance is lost, so that dangerous accidents are prevented.

In order to achieve the purpose, the invention is provided with a double-cover protection measure inside the power supply wiring cavity and the cable junction box, and the double covers are made of non-magnetic metal materials such as stainless steel, copper and the like. The first layer of non-magnetic metal material (1) is internally provided with a strong magnetic permanent magnet (2), the second layer of non-magnetic metal cover plate (3) is provided with a magnetic sensor (4) below the second layer of non-magnetic metal cover plate, and the second layer of non-magnetic metal cover plate (3) also plays a role in explosion suppression. When the second layer of non-magnetic metal cover plate (3) is to be opened, the cover plate of the first layer with the strong magnet is removed, namely the strong magnet (2) is removed, and when the strong magnet (2) is removed, the normally open contact of the magnetic sensor (4) is connected with a trip protection circuit, and the power supply is disconnected through a special trip loop.

Drawings

For the purpose of promoting an understanding of the principles of the structure and best mode for practicing the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings.

The attached drawing is a structural schematic diagram of the explosion-proof electrical equipment for preventing the cover from being opened in an electrified way.

Detailed Description

As shown in the figure, a permanent magnet (2) is embedded below the first layer of cover plate (1), the second layer of cover plate (3) is explosion-proof, and the two layers of cover plates are made of non-magnetic metal materials. And a magnetic sensor (4) is arranged below the second layer of cover plate (3), the contact of the magnetic sensor (4) is disconnected under the action of a magnetic field of the magnet, when the permanent magnet (2) below the first layer of cover plate is removed, the contact of the magnetic sensor (4) is connected, and the power supply of the equipment is disconnected through two special control lines.