Welding of Pipes in Vacuum Water Diversion System
In the vacuum water diversion system of a water pump, since the water level in the buffer device rises to a continuous linear state, in order to fully understand the liquid level rise characteristic, an ultrasonic level instrument is used for the liquid level detection design. According to the size of the buffer device, the system uses an ultrasonic level instrument with an emission angle of 9° and a blind zone of 0.06m to detect the entire process of rising the orifice plate.
According to the size of the pump body, the corresponding liquid level height threshold is set to complete the start-up water filling requirements for different types of centrifugal pumps. The water pump master control system sends the pump body full water signal so that the control system controls the water pump motor main circuit to start the water pump.
The vacuum buffer device should be designed based on the size of the pump to use the estimation method. The diameter of the buffer device is selected by 2 times the diameter of the suction pipe, and the height parameter of the cylinder should meet the volume of 1 pump volume 3 times. When the water level in the buffer device reaches the set height, ensure that the pump body is filled with water. The tapered section of the lower part of the buffer device is designed with a 60° taper angle, and the upper and lower 2-layer throttle plates are installed in the middle of the vertebral body. The gaps in the orifice plates are staggered so that the flow of water directly through the orifices reduces the rate of air deposition.
Cone and column are connected by welding process. DN25 water inlet pipe is welded on the lower part of the vertebral body and the connection pipe thread is pre-processed. The upper end of the cylinder and the top cover are connected by flange bolts (in order to install the ultrasonic level meter in the center of the upper cover). ), DN25 vacuum interface center is located on the upper end of the cylinder 4cm from the top cover mounting surface, and set aside the connection pipe thread.
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