This paper introduces the features of the circulating water vacuum pump in the laboratory, including the following seven points

The laboratory circulating water vacuum pump is based on the multi-purpose vacuum pump for circulating water According to the characteristics of small laboratory area, referring to the Japanese desk pump, it is made of one-time formed shell and reduced volume It has the characteristics of small volume, light weight, beautiful appearance, double surface and double head pumping, Four watches and four taps, the same multi-purpose vacuum pump on both sides, even in the teacher's intuitive demonstration, students can turn on and off on either side The working medium of laboratory circulating water vacuum pump is water: the principle of vacuum pumping of circulating water vacuum pump is different from that of jet pump It is still a centrifugal mechanical pump The eccentric device in the cylindrical pump shell is the impeller rotor The blades are forward curved When the impeller rotates Under the action of centrifugal force, the working water forms a water ring swirling along the pump shell Due to the eccentric position of the impeller The water ring operates relative to the blade The spatial volume between two adjacent leaves changes periodically Like liquid "piston" cascade for radial reciprocating operation For example, when the blade on the right side of the figure rotates from the top right to the bottom The water piston "between each two blades is centrifugal and pushed outwards So that the volume of the space from small to large To the bottom is the smallest The product features of laboratory circulating water vacuum pump: 1 The machine works stably and reliably with low noise 2 The jet is coated with PTFE, and the gas pipeline of the laboratory circulating water vacuum pump is made of fluororubber, with longer service life and better reliability 3 Corrosion resistance and pollution-free: the water pump parts of this machine are made of stainless steel, the water tank is made of polychlorinated plastic, which is not affected by corrosive substances such as acid and alkali, and there is no oil pollution in the laboratory 4 Multi function comprehensive use: in addition to providing vacuum conditions, the machine can also carry out automatic water circulation at the same time to provide circulating cooling water for the reaction device The machine is connected with the self supplied water source, and the temperature of the circulating water can be kept constant under the condition of continuous operation for a long time through proper supplement of the water source, which can not only ensure the vacuum degree does not drop, but also realize the supply of the circulating cooling water 5 Novel shape and convenient use: the pump head of the laboratory circulating water vacuum pump is directly immersed in the water, without a watering can, with large water capacity Four casters are installed under it, which is easy to move, operate, add water and maintain 6 The water separator installed in this unit is equipped with five air extraction nozzles, which can be used for single or parallel air extraction A vacuum gauge can be installed to observe the vacuum degree conveniently A check valve is installed on the air extraction path When the vacuum operation is stopped, the circulating water vacuum pump in the laboratory can prevent the circulating water from flowing back into the vacuum equipment 7 Obvious water-saving effect: due to the use of water circulation operation, the water added into the water tank can be used repeatedly, which overcomes the phenomenon that a large amount of water is wasted when using the method of directly flushing tap water to obtain vacuum According to the actual measurement and calculation of one working day's continuous operation, the laboratory circulating water vacuum pump can save more than 8 tons of water when it reaches the same vacuum degree Moreover, under the condition of ensuring the water temperature and quality, the laboratory circulating water vacuum pump can be used for a long time by adding water once This is especially true in laboratories where there is a lack of water or water pressure.