Dongda Mechatrics takes you to learn the fault and treatment of automatic no-pressure damper in mining

Mine automatic no-pressure door has played an important role in the safety of coal mines since its listing. It has laid the foundation for the construction of smart coal mines and safe coal mines. Many customers will meet the fault problem that the damper can not be automatically closed normally and the no-pressure damper can not be opened normally in the process of use. Dongda electromechanical Xiaobian to share with you the solution to the fault.

First, the damper can not automatically close after opening

1. The transmitting end and the receiving end of the infrared sensor are not in a straight line. The position of the transmitting end and the receiving end should be adjusted until they are in a straight line. Representation states that are not in a straight line are:

(1) The LED display light at the infrared receiving end is always on red light. Note: When a mine automatically without damper on either side of the LED lights up a set of infrared sensors problems, no question of another group of infrared sensor LED light will follow to light up, which requires technical personnel find what problems in the group of infrared sensor, and then suit the remedy to the case (in finding the problems which group of infrared sensor method: First, disconnect the 24V power supply of a group of infrared sensors, and then judge which group of infrared sensors has the problem according to the state of the LED of the infrared sensor that has not been disconnected.

(2) The I3 or I4 of the PLC in the damper main control box is always in the triggering state and always executes the opening command.

(3) the infrared receiving end and the transmitting end are not in a straight line;

(4) the connection of the negative end of the infrared receiver circuit and the positive connection is normal, (symptoms: off the positive end of the infrared receiver button can be used normally, in the connection of the infrared receiving end of the positive pole when the PLC I3 or I4 is always triggered).

The transmitter circuit is disconnected, and the transmitter cannot perform the transmitting work. This shows that the infrared LED at the receiving end is always on, and there is no red bright spot in the center of the transmitting end.

3. At one end of the mine automatic non-pressure damper, a manual electric control button is used to open the damper. After passing through the damper, the electric control button is not used to close the damper, but an infrared sensor is used to automatically close the damper, at this time the damper cannot be automatically closed (there is a reciprocal priority relationship between infrared and button).

Power off or leakage protector power off.

5 infrared sensor glass is dirty perspective is not good, to remove the pollutants on the infrared sensor glass in time, maintain good perspective or infrared sensor has been damaged (performance is when the pedestrian or vehicle through the infrared sensor, infrared sensor emitting end LED light is not bright).

6 PLC program artificial adjustment, resulting in program chaos can not perform the normal automatic opening and closing function of the damper, to strictly keep the main control box of the damper, do special management, can not arbitrarily rewrite the damper PLC program.

Two, mine automatic non-pressure damper can not open normally

1 infrared sensor problems, performance is: when pedestrians or vehicles through the infrared sensor, the infrared sensor emitting end of the LED is not bright.

When the damper cannot be opened by using the electric control button, the circuit between the electric control button and the main control box may be disconnected or the contact of the electric control button is not good, and the electric wire or the electric control button should be replaced.

Power off or leakage protector power off.

4 the motor is damaged and does not work or the thrust of the electric push rod is too low (for the electric pneumatic automatic damper, the pressure gauge of the oil-water separator should be adjusted at 0.5— Between 0.8MPa), the output pressure of the hydraulic station should be adjusted to a reasonable level.

5PLC program artificial adjustment, resulting in program chaos can not perform the normal automatic opening and closing function of the non-pressure damper, Ji 'nan Dongshan technical experts remind you to strictly take good care of the main control box of the damper, do special management, shall not randomly rewrite the damper PLC program.

In a word, when we use the mine automatic non-pressure damper, we should accurately grasp its internal operation law, timely troubleshoot, and provide reliable guarantee service for the safe production of the mine.