1, explosion-proof generator
The function of flameproof generator is to charge the battery and supply power to the external load. With built-in voltage regulator.
Use and maintenance of flameproof generator
(1) The generator must be used in conjunction with the explosion-proof power box. The generator and power box must be connected correctly and reliably with mine cables, and the positive and negative ends shall not be connected reversely, short-circuited and grounded.
(2) Regularly check the tightness and wear of the V-belt of the generator. And keep the V-belt in proper tension.
(3) When repairing the generator, disconnect the cable from the power box first, and it is forbidden to open the cover with electricity for maintenance.
Outline drawing of flameproof permanent magnet generator
2. Explosion-proof starter
Use and maintenance of flameproof starter
(1) The starter must be used in conjunction with the explosion-proof power box. The starter and power box must be connected correctly and reliably with mine cables, and the positive and negative ends shall not be connected reversely, short-circuited or grounded.
(3) The starting time of the starter shall not exceed 10 second at a time. If the diesel generator fails to start within 10 second, it should be restarted after a pause of 2 minutes, and the starter should not be used for a long time or for many times in succession.
3. Explosion-proof power box
The function of flameproof power box is to supply power for starter and other external loads. It consists of a storage battery cavity, a wiring cavity and a switch cavity which are isolated from each other.
Use and maintenance of flameproof power box;
(1) The power box has different interfaces for different wire diameters. A corresponding mine cable must be used between each electrical appliance and the power box, and it can only be used after being reliably connected through the interface corresponding to the wire diameter.
(2) Before opening the wiring cavity cover for wiring or maintenance, the main power switch must be turned off, and the generator will stop supplying power.
(3) It is forbidden to open the battery cavity cover underground for battery replacement or maintenance.
(4) It is forbidden to open the switch cavity cover underground for switch replacement or maintenance.
(5) If the battery or switch needs to be replaced, it must be replaced in strict accordance with the model specified by Cummins generator manufacturer. Can not be replaced by other models.
4, automatic protection device
The automatic protection device of explosion-proof diesel generator consists of explosion-proof electromagnetic valve, explosion-proof control box, water level sensor, temperature sensor (two), temperature switch, oil pressure switch, speed sensor and connecting wire.
Each part of the device is installed in the corresponding position of the explosion-proof diesel generator, and the power supply is provided by its own DC power supply (24V). When the exhaust temperature of diesel generator reaches 70 2℃, or the cooling water temperature reaches 95 2℃, or the highest surface temperature reaches150 5℃, or the lubricating oil pressure is lower than the lowest pressure, or the rotating speed exceeds the highest rotating speed, or the waste gas treatment box is short of water, the temperature sensor and temperature switch receive temperature signals, the oil pressure switch receives oil pressure signals, the rotating speed sensor receives rotating speed signals, and the water level sensor receives water level signals. When an index of the explosion-proof diesel generator reaches the specified value in the following table, the IC control module triggers to send out an audible and visual signal alarm, and the solenoid valve is energized within the set delay 1 minute. So as to immediately close the low-pressure oil supply channel of the diesel generator or control the gas path of the cylinder of the oil cut-off valve of the diesel generator, force the diesel generator to stop, protect the diesel generator from being damaged, and protect the mine fire prevention and explosion prevention safety. At the same time, an electric locking device is arranged between the explosion-proof electromagnetic valve and the explosion-proof electric control box. The schematic block diagram of the electrical system of the device is shown in Figure 3-30.
Use and maintenance of automatic protection device;
(1) The automatic protection device and the power box must be connected correctly and reliably with mine cables.
(2) The signal line between the automatic protection device and each sensor must be connected correctly and reliably.
(3) The automatic protection device is a mine explosion-proof electrical product, and its circuits and electronic components shall not be changed or replaced at will. If you need maintenance, please contact Cummins generator manufacturer directly.