First, the use of precautions (1) After the installation is complete, hand rotating the coupling to check for friction phenomenon. (2) In order to prevent debris from entering the pump, a filter is arranged at the inlet of the pump, and the filtering area is larger than 3 to 4 times of the cross-sectional area of ​​the pipe. (3) is strictly prohibited air transport. (4) Lift pump should be installed in the outlet pipe check valve to prevent water hammer suddenly shut down damage. (5) open the pump program: open the inlet valve before driving, the pump filled with liquid to be transported; close the outlet valve; jog the electric motor, check the steering pump is correct; pump start, the outlet valve should be slowly open, Pump to be up to the normal operation, then the outlet valve transferred to the desired opening. Trial run 5 ~ 10min, if no exception, can be put into operation. Shutdown procedure: Close the outlet valve; cut off the power supply; shut down the inlet, clean the flow passage in the pump and cut off the power when not in use for a long time. Second, maintenance matters needing attention (1) pump shaft broken. CQB-type magnetic pump shaft material used is 99% of alumina ceramic, the main reason for the shaft is broken, because the pump runs dry, dry the shaft and the bearing shaft twist off. Open the pump inspection can be seen when the bearing has been seriously damaged to prevent the pump broken off the main method is to avoid the air pump running. (2) bearing damage. CQB pump bearing material is high density carbon, in case of pump water or pump impurities, it will cause the bearing damage. Cylindrical shaft coupling inside and outside the rotor between the coaxial requirements if not guaranteed, will also directly affect the bearing life. (3) can not pump liquid. The pump is the most prone to failure of the liquid pump, its reasons are more. First of all, check the suction pipe of the pump for any leaks, check whether the air in the suction pipe is drained, whether the amount of liquid poured in the pump is enough, if there is any clogged debris in the suction pipe, check if the pump is reversed Especially after changing the motor or overhauling the power supply line), you should also pay attention to whether the pump suction height is too high. If the above inspection still can not be solved, the pump can be disassembled to check whether the pump shaft is broken or not. Check whether the moving ring and the static ring of the pump are intact, and whether the entire rotor can move in a small amount of axial direction. If the axial movement difficulties, can check whether the carbon bearing with the pump shaft is too close. It is worth noting that the pump repair a few times to find out the problem, should pay attention to the work of the magnetic coupling is normal. Bearings, inner magnetic rotors and spacers generate heat during operation, which increases the operating temperature and, on the one hand, reduces the power delivered and, on the other hand, a great deal of hassle for the pump that delivers easily vaporised liquids. Magnetically transmitted power with temperature increases is a continuous decline in the curve, usually below the working temperature limit of the magnet, the decline of its transmission capacity is reversible, but above the limit temperature is irreversible, that is, the magnet cooling After losing the ability to pass the transfer can no longer be restored. Under special circumstances, when the magnetic coupling slips (out of step), the eddy current heat in the spacer increases rapidly and the temperature rises sharply. If it is not processed in time, the magnet will demagnetize and make the magnetic coupling fail. Therefore, the magnetic pump should design a reliable cooling system. The medium is not easy to vaporize, the cooling system is generally circulated by the impeller outlet or pump outlet leads to the liquid flow through the bearing and magnetic drive back to the suction port, the vaporization of the medium, the heat exchanger should be added or the liquid flow to the pump Of the tank, to avoid heat back to the suction port, for solid impurities or ferromagnetic impurities in the media, should consider filtering, high temperature medium, you should consider cooling to ensure that the magnetic coupling does not exceed the working temperature limit. In considering whether the speed is enough, we must first check the motor speed is normal, tachometer available for measurement, the motor speed is normal, you can consider whether there will be magnetic coupling slippage. (4) lack of lift. The reasons for this failure are: transmission medium air, impeller damage, speed is not enough, the proportion of liquid transport is too large, the flow is too large. (5) lack of traffic. The main reasons for the lack of flow are: impeller damage, speed is not enough, the lift is too high, the tube is clogged with debris and so on.
Fire Room Smart Glass
In recent years, smart dimming glass has been widely used in home partitions, hotel bathroom partitions, office partitions and other scenarios. The glass itself has all the characteristics of safety glass, but also has the control of glass transparent or not privacy protection function. EC dimming glass has a slow response speed, which may be as long as several minutes. PDLC has very limited thermal insulation effect. Increasing the thermal insulation effect can add a layer of low-E glass, while SPD and EC technologies have good thermal insulation effect.Due to the relatively high operating voltage, the application scenarios are relatively limited due to the consideration of security risks, and are relatively rare in China. PDLC has two basic states: transparent and atomized. Even if glass atomized, a lot of light will pass through, that is, transparent but opaque. PDLC can also create transformable transparent or atomized graphic effects on glass, with good design and expansion properties. EC and SPD can continuously adjust the rate of light passing between transparent and colored states, but cannot design graphic effects.
Smart Pdlc Film,Smart Glass Partition,Electronic Pdlc Smart Tint,Opaque Window Electric,Switchable Glass Film,Pdlc Film Switchable
Tianqixun Technology , https://www.tqxdisplay.com
