In urban construction, when excavating the foundation and burying underground pipes, underground water is the first issue to be solved. The key to solving the problem is to use a water pump to smoothly extract water and sludge from the ground. Normal water diving is required. The pump was unable to complete the project because the water under the roadbed contained a lot of sediment. It stuck the impeller of the pump to the water pump motor, so it had to use a sewage submersible pump to complete this pumping task.
At present, the popular sewage pump in the market does bring many conveniences to the urban construction unit. However, it also has some shortcomings, that is, its service life is not very long. The reason is that there are different types of garbage in the sludge. The stone formed a blockage in the outlet of the pump body or entrapped the impeller so that the motor did not turn. The above situation occurred and the pump could not be used any longer.
To solve this problem, the sundries and long fibers sucked by the pump must be cut and then discharged, and then the sand and water should be blown out together. This not only prolongs the service life of the pump, but also creates conditions for the speeding up of the construction work of municipal projects. .
There is also a stir-type electric pump , which functions slightly differently from cutting. It is equipped with a stirrer attachment. When the water is pumped to the bottom layer, due to the proportion and uneven concentration of sediment or sediment in the underwater, it is sucked in by the thick sediment until the water is not drained. This is the first step. It is necessary to stir them evenly and dilute them to thin sand so that it is not easy to damage the electric pump.
In addition, in order to maintain the balance of the axial force of the main impeller, an auxiliary impeller structure must be provided, which can reduce the pressure of the sealing chamber, and greatly increase the axial force of the electric pump and the service life of the mechanical seal.
The problem of heat dissipation of the electric pump has always been a key issue in the service life of the electric pump. If the heat dissipating effect is not good, the temperature in the motor will increase, causing the motor power to continuously increase, easily destroying the motor and shortening the service life of the pump. To solve this problem, we use an external circulation cooling system to enhance the cooling function. It can ensure that when the electric pump is exposed to the water surface, it can still work normally.
For the discharge of corrosive liquids, the stainless steel electric pump can be used first, and its corrosion resistance and use reliability will be greatly improved.
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Author: Yong Jia Liangbang pump manufacturers
Mercury Rod Type Glass Thermometer
Products Description
The normal-temperature thermoscope is a glass-stem Thermometer with a sheath, whichcan display the temperature value of the measured point on site.
Note:
For thermometers starting from high temperature, note that there is a conical bubble above the temperature bubble. Sometimes, segments will break during transportation or storage, which is a normal phenomenon of thermometers.It's completely repairable.If there is a break in the thermometer, if the top column of mercury and the bottom section of gas can be cooled into a conical bubble, a broad downward swing will connect them.Repair the broken joint of the thermometer by cooling.The idea is to cool or heat the mercury column and the broken joint to the widest part of the area.
Compare the differences in degree of certainty:
Ordinary thermometers are very simple. Some thermometers have only two points, zero, fifty or one hundred.Most thermometers in circulation in the market are of two points.And the degrees are very irregular, so let's say zero degrees, the ice water mixture doesn't break the ice and scoop a ladle of cold water into it or the ice water mixture, you throw a bunch of thermometers in there and you start to measure.No matter where the liquid level is, mark 0 on the top of the mercury column of the thermometer. Wrong method.Setting a temperature of 100 degrees is not simply a matter of throwing boiling water into it.
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