Sewage flowmeter during the use of common faults and solutions
Weihai Kunke flow meter professional sewage flow meter manufacturers
1. Sewage flowmeter failure phenomenon: fluid does not flow, flow display is not zero, or display value is unstable 2. Probable causes a. Transmission line shield is poorly grounded, external interference signal is mixed into the display instrument input b pipe vibration, impeller follows Jitter, resulting in false signal c. The closing valve is not closed due to leakage. Actually, the meter shows leakage quantity d. The internal circuit board of the meter or the deterioration of the electronic components is damaged. The resulting interference 3. The sewage flow meter solution a Check the shielding layer and display Whether the instrument terminals are well grounded b Reinforce the pipeline, or install brackets before and after the sensor to prevent vibration c Check or replace the valve d Take “short-circuit method†or check items one by one to determine the source of interference and identify the point of failure.
II. 1. Sewage flow meter failure Phenomenon: The flow rate is not reduced, but the flow rate is gradually decreased. 2. Probable causes a. Whether the sewage flow meter filter is clogged or not, if the filter pressure difference increases, it indicates that the debris has been blocked b. The spool on the flow sensor tube segment is loose, the valve opening is automatically reduced c The flowmeter sensor impeller is obstructed by debris or the bearing gap enters foreign matter, the resistance increases and the deceleration slows down 3. Solution: a Eliminates the filter b from the valve Check whether the handwheel adjusts the effective judgment. After confirmation, repair or replace c. Remove the sensor and clear it. If necessary, check again.
Three, 1. Sewage flow meter failure phenomenon: No flow when the fluid is flowing normally, the total number of counter words does not increase 2. Probable causes a Check the sewage flow meter power line, fuse, function selector switch and signal line with no open circuit or bad contact b Check the inside of the sewage flow meter display device printing plate, contacts and other contact failure c Inspect the sewage flow meter detection coil d Check the internal flow of sewage water meter sensor failure, the above-mentioned 1-3 checks are confirmed to be normal or have been troubleshooting, but there is still The fault phenomenon indicates that the fault is inside the sensor flow channel. It can check whether the impeller touches the inner wall of the sensor, whether there is any foreign matter stuck, and whether the shaft and the bearing are stuck or broken. 3. Sewage flow meter solution: a Use an ohmmeter to troubleshoot Fault point b Printed board failure inspection can replace the "backup version" method, replace the fault board and make a detailed inspection. c Make the position of the detection coil on the sensor body, turn the test head off, and use the iron sheet under the test head quickly. Move, if the number of counter words does not increase, check whether the coil breaks and the welding spot is removed to remove foreign matter, and clean or replace damaged. Member, after recovery or after blowing hand toggle wheel, should be no frictional sound, replacement of bearings and other parts should be re-check, the new meter factor is obtained.
Weihai Kunke flow meter professional sewage flow meter manufacturers
Construction Hoist Safety Device
Safety is one of the most important for Construction Hoist, thus the Construction Hoist Safety Device is required. SAJ safety device is a product of BQ. When a cage over-speeds the device should act cut off the power stop the cage on mast gradually. The safety device is adjusted and sealed. Do not disassemble it. The using time limit of safety device are signed on it`s nameplate. Safety device must be delivered to the factory and inspected after it reached to time limit.
Safety device board is the connected part between safety device and other structures, it can take the impact of stopping the cage. There are installed lower speed switch, upper travel limit switch and final limit switch, once the switchs touch the relevant cam the cage will act.
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