5results about How to "Improve flameproof performance" patented technology

This invention discloses a welding device for a one-way explosion-proof valve body, comprising an adjustment component, a welding component, and a welding surface finishing component. The adjustment component is used to adjust the position of the welding surface finishing, and the welding component is used for adjusting and welding the valve body. The welding component includes a fixed plate fixedly mounted on the top of a fixed base and a first sliding rod fixedly mounted on the fixed plate. The welding surface finishing component is used to pre-treat the welding surface of the valve body at the position where it is welded to the flange. The welding surface finishing component includes a mounting plate, a transverse partition fixedly mounted on one side of the mounting plate, and side plates fixedly mounted on both sides of the transverse partition. This invention uses a rotating annular finishing strip to clean the welding surface of the valve body and the flange. The annular finishing strip fits tightly with the welding surface of the valve body, effectively removing oxide layers, oil stains, and impurities from the welding surface, improving the weld bonding strength, and avoiding affecting the subsequent assembly and sealing performance of the valve body.

The present application relates to a kind of coal mine with explosion-proof handheld electric tool, the electric tool includes: shell, motor module, reducer module and battery assembly, installation cavity is equipped in shell, motor module includes motor shell and motor body, motor shell is metal explosion-proof structural member and has first explosion-proof cavity, motor body is located in first explosion-proof cavity, the output shaft of motor body is connected with the transmission of reducer module, battery assembly includes battery box, battery and control panel, battery box is metal explosion-proof structural member, battery box is equipped with second explosion-proof cavity, battery is located in second explosion-proof cavity and is electrically connected with battery module, electric tool further includes speed plate, switch plate, commutating switch and safety barrier, any one of speed plate, switch plate and commutating switch is electrically connected with control panel by safety barrier.The explosion-proof effect of the handheld electric tool of the present application is good, is favorable for guaranteeing the reliability of electric tool work, and weight is lighter.

The utility model provides a valve positioner, and belongs to the technical field of explosion suppression of valve positioners. The valve positioner comprises a shell, a pneumatic channel, a first explosion-proof cavity and a second explosion-proof cavity are arranged in the shell, the pneumatic channel comprises a first branch channel and a second branch channel, the first branch channel is communicated with the first explosion-proof cavity, and the second branch channel is communicated with the second explosion-proof cavity. The flame can move towards the first explosion-proof cavity through the first branch flow channel, and the flame can move towards the second explosion-proof cavity through the second branch flow channel. According to the valve positioner, the explosion-proof performance of the valve positioner can be improved.

This utility model discloses a small explosion-proof indicator light, comprising: a lampshade, an indicator light, a circuit board, and a fixed base. The upper end of the fixed base extends into the lampshade, the circuit board is disposed within the fixed base, and the indicator light is disposed within the lampshade and located at the upper end of the fixed base. The lower end of the indicator light is connected to the upper end of the circuit board. Through the application of this utility model, a small explosion-proof indicator light is proposed. Its lampshade is injection molded from high-polymer plastic material. Compared with traditional metal-cased explosion-proof indicator lights, it helps to reduce the overall weight and volume of the explosion-proof light, making it easier to install and transport, reducing the labor intensity of installers, and expanding its application range in places with strict weight restrictions. Furthermore, by setting a threaded portion and an O-ring seal, it can effectively enhance the sealing between the lampshade and the explosion-proof cover, further improving the explosion-proof performance.

The utility model provides a valve positioner, and belongs to the technical field of explosion suppression of valve positioners. The valve positioner comprises a shell and a feedback shaft assembly, the feedback shaft assembly comprises a bearing mechanism, a first main shaft and a second main shaft, the first main shaft and the second main shaft can be kept static relatively, the first main shaft and the second main shaft are configured to be of independent forming structures respectively, the bearing mechanism is connected with the shell, and the second main shaft is connected to the bearing mechanism. The first main shaft is provided with a feedback part protruding out of the first main shaft in the radial direction, the feedback part is used for feeding back the position of the feedback shaft assembly, and the end, deviating from the first main shaft in the axial direction, of the second main shaft is connected with an actuator matched with the valve positioner so that the feedback part can feed back the position of the actuator. According to the valve positioner, the production cost of the valve positioner can be reduced, and the explosion-proof performance of the valve positioner can be improved.