The explosion-proof conveyor scale consists of a frequency converter, an actuator motor, a control device, and load current detection. The control device consists of a programmable logic controller (PLC), AD and D/A conversion modules, etc. The frequency converter is composed of a explosion-proof shell main chamber, explosion-proof wiring chamber, intrinsic safety control chamber, frequency conversion speed control system, and program parameter controller. The control device is composed of a programmable logic controller (PLC), A/D and D/A conversion modules, etc. The load current signal comes from the weight data of the electronic weighing scale and the current feedback signal of each drive conveyor frequency converter. Due to the fact that most of the objects being measured are non electric, the signal generated by the weighing sensor is generally weak at the mV level. The output electrical signal is amplified by an operational amplifier with input impedance, and the post voltage of the sensor is changed according to the weight change of the material on the Electronic scale conveyor. It is directly connected to the input terminal of the AD converter. The converted digital signal is sent to the PLC that recognizes the digital signal for data processing, display and storage. The PLC can also compare the operation result with the ideal value stored in the memory. Through appropriate programs and algorithms, it can output control signals to the executing components. The digital signal in the weighing device and the speed signal of a speedometer are separately sent to the weighing instrument to directly obtain the feeding amount signal data of multiple different materials. When the feeding port is feeding at the same time, the digital signal in the digital weighing device and the speed reading signal of the speedometer are respectively sent to the weighing instrument. The weighing instrument processes and calculates the three digital signals of the weighing scale (weight) and the speed pulse signal of the speedometer sensor, and directly obtains the feeding amount of different materials through integration calculation.

The weighing scale adopts a base, and the top of the base is fixedly connected to the main body of the weighing scale. The bottom of the base is provided with a through port, and both sides of the top of the base cavity are fixedly connected to electric push rods. The bottom of the electric push rod is fixedly connected to a moving plate. The silo weighing scale adopts a weighing frame, and two weighing frames are arranged horizontally and symmetrically. The two ends of each connecting frame are respectively detachably connected to the corresponding weighing frame to enclose a hopper. The lower end of the silo is set in the hopper and fixedly installed on the weighing frame; Each weighing sensor is set at both ends of the weighing frame, with the bottom of the weighing sensor connected to the ground and the top of the weighing sensor connected to the weighing frame. Both ends of each weighing rack are fixedly installed with a first card plate, which is located on the side wall of the weighing rack. The two ends of each connecting frame are fixedly installed with second card plates, and each card plate can be disassembled and connected by screws. The cross-section of the hopper is a square structure. Four lifting components are used, each set at both ends of the weighing frame. The top of the lifting component is fixedly connected to the bottom of the weighing frame, and the bottom of the lifting component is connected to the ground. Each lifting component adopts a fixed sleeve and a movable column. The top of the fixed sleeve is fixedly connected to the bottom of the weighing frame, and there are screw holes in the fixed sleeve. The movable column is provided with threads and connected to the screw holes through corresponding threads. The bottom of the movable column is connected to the ground. The top of the weighing sensor is connected to the bottom of the movable column using two support members. One end of each support member is detachably connected to the corresponding weighing frame, and the other end of each support member is detachably connected to the corresponding connecting frame. The two support members are symmetrically arranged relative to the weighing frame, and are reinforced with four equilateral triangular structures. Each reinforcement plate can be disassembled and installed on the corresponding support member, and the two equilateral sides of each reinforcement plate are respectively in contact with the side walls of the weighing frame and the connecting frame.