Mine explosion-suppression and intrinsic safety type monitor display

The invention relates to a mine explosion-suppression and intrinsic safety type monitor display. Two paths of non-intrinsic safety type output of a switch power source are respectively connected with a first intrinsically safe switching circuit and a second intrinsically safe switching circuit, the output end of the first intrinsically safe switching circuit is connected with an intrinsically safe backlight circuit, the output of the intrinsically safe backlight circuit provides intrinsically safe backlight power for an LED (Light-emitting Diode) backlight lamp, and the output of the second intrinsically safe switching circuit provides intrinsically safe driving power for a main drive board circuit. The monitor display is characterized in that the provided power source supplying power to a main drive circuit and a backlight circuit of a liquid crystal display is an intrinsically safe power source (matching the use condition underground the coal mine), and the provided LED backlight power ...

Water heater

The invention discloses a water heater which comprises a shell, a combustor, a combustion chamber, a main heat exchanger, a gas supply pipe and a fan and further comprises a condensation heat exchanger and a drainage assembly. The condensing heat exchanger comprises a shell and a heat exchange pipe, a bottom plate of the shell is provided with a flue gas inlet and a drainage connector, a top plate of the shell is further provided with a flue gas outlet, and the heat exchange pipe is arranged in the shell and located between the flue gas inlet and the flue gas outlet; the drainage assembly comprises a condensate water collecting tank, a water level sensor, a drainage pipe and a heating and pressurizing module; the heating and pressurizing module comprises a gas tank, an electric heating part, a one-way valve and an electric control valve; a first air inlet cavity and a second air inlet cavity are formed at the bottom of the combustion chamber in a spaced mode, the draught fans comprise the ...

Belt conveyor safety protection information collecting and monitoring system

The invention provides a belt conveyor safety protection information collecting and monitoring system which comprises a control module, the control module is electrically connected with a processing module, and the processing module is electrically connected with a detection module; the control module is electrically connected with a communication module, and the communication module is in communication connection with a remote system. The control module is electrically connected with a local area network, and the local area network is in communication connection with other devices. The belt conveyor is detected through the detection module, calculation processing is conducted through cloud computing, remote control and adjustment are conducted through a remote system, mutual connection of all devices in a mine is achieved through a local area network, interlocking control over reverse coal flow starting and down coal flow stopping is achieved, and therefore the effects of reducing people ...

Ethernet gateway based on field bus and implementing method thereof

The invention is a field bus-based Ethernet gateway, including: Ethernet communication interface, master control module, dual-port RAM, peripheral circuit, auxiliary control module, and bus communication interface. Its implementing method includes the following steps: a. initialize; b. enter in running state, as no Ethernet or field bus data need processing, go to the step c, and as Ethernet or field bus data need processing, adopt event trigger form to enter in the step d, and after finishing the execution, return to the step b; c. execute system management and network management; d. process the data. It can realize information exchange between field bus system and distributed control system, eliminating 'information islets' between various control systems and realizing united system monitoring.

Mine explosion-suppression and intrinsic safety type monitor display