Usually use fire pump should take some measures, but in the winter, not only should do a good job of measures, more important is anti-freezing, warm, because the winter cold, in low temperature environment, the pump is easy to freeze, once the pump is frozen will affect the use of the pump. So how do you keep the pump from freezing?
1, empty the water in the fire pump, and then add water when using.
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2. If the equipment freezes, pour hot water or boiling water into the pump to internalize the ice, or heat the pump shell.
3, put the fire pump in normal temperature environment.
4, choose insulation pump, add steam or hot water insulation layer.
When it comes to winter, do the above measures for the fire pump to reduce icing and prevent the pump from being frozen. The pump is more efficient in warm conditions, but its function can be affected if it freezes.
Fire pump installation and use should pay attention to the installation of inlet and outlet, if the inlet and outlet installation is not correct, will reduce the efficiency of the equipment, seriously affect the use of equipment, so how to avoid entering the installation error?
1. The inlet position of the water inlet pipe is not correct. When the water inlet of the water inlet pipe is not enough, it will cause whirlpool on the water surface around the water inlet pipe, which will affect the water inlet and reduce the water output. Accurate installation method is: small and medium-sized fire pump water inlet shall not be less than 300~600mm, large water pump shall not be less than 600~1000mm.
2, large diameter centrifugal pump with small water pipe water delivery
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Many people think that this can improve the actual head of the fire pump, actual head = total head – lost head. When the model is determined, the total head is certain; The decrease in head mainly comes from pipeline resistance. The smaller the pipe diameter is, the greater the resistance is obviously, and the greater the loss of head is. Therefore, after reducing the pipe diameter, the actual head of the centrifugal pump will not increase, but decrease, resulting in the efficiency of the fire pump falling.
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Similarly, when the small diameter fire pump uses large water pipe to pump water, it will not reduce the actual head of the pump, but will reduce the loss of head due to the reduction of pipeline resistance, so that the actual head is improved. As long as the pump is within the rated lift range, the pump can work properly regardless of the pipe diameter, and can reduce line losses and improve pump efficiency.
3. The inlet of the fire pump is directly connected with the elbow. This will make the water flow through the elbow into the impeller uneven distribution. When the inlet pipe diameter is greater than the pump inlet, eccentric reducer should be installed. The flat part of the eccentric reducer shall be mounted on the top and the inclined part on the bottom. Otherwise collect air, reduce the amount of water or pumping water, and there is a crash. If the inlet pipe and pump inlet diameter is equal, the pump inlet and elbow should be added between the pipe, the length of the straight pipe shall not be less than 2 to 3 times the diameter of the pipe.
Fire pump should be installed in the correct way when installing, pay attention to the installation of parts, at the end of the installation into use, to check the equipment before starting, check no problem can be put into use.
Post time: Jun-20-2022