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Mainly used for fire fighting system pipeline pressurized water supply diesel engine fire pump

Diesel engine fire pumps can be divided into self-priming, centrifugal and double-suction types. Self-priming pumps are widely used in urban flood control and emergency rescue. Centrifugal pumps are divided into single-stage centrifugal pumps and multistage centrifugal pumps.

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Diesel engine fire pumps are mainly used for pressurized water delivery in fire protection system pipelines. It can also be applied to industrial and urban water supply and drainage, high-rise building pressurized water supply, long-distance water supply, heating, bathroom, boiler cold and warm water circulation pressurized air conditioning refrigeration system water supply and equipment matching and other occasions. The part of the pump body and the pump cover of the diesel engine fire pump is split from the back of the impeller, which is the so-called rear door structure. The advantage is that the maintenance is convenient. During maintenance, the pump body, the suction pipeline, the discharge pipeline and the motor are not moved, and the rotor part can be withdrawn for maintenance only by removing (lengthening) the intermediate connecting piece of the coupling. The casing of the diesel engine fire pump constitutes the working chamber of the pump. The impeller, shaft and rolling bearing are the rotors of the pump. The suspension bearing part supports the rotor part of the pump, and the rolling bearing receives the radial and axial forces of the pump. In order to balance the axial force of the diesel engine fire pump, most pumps are provided with sealing rings at the front and rear of the impeller, and a balance hole is provided on the back cover of the impeller. Due to the small axial force of some pumps, there is no seal on the back of the impeller. Ring and balance hole.

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    In the fire fighting pipeline pump, according to the different installation methods can be divided into vertical fire pumps and horizontal fire pumps, many people have questions about these two common pumps, what is the difference between the two? Shanghai Xizhiquan will explain the difference between horizontal and vertical pumps.

    Obviously, different installation methods take up different space. Vertical pipeline pumps are installed vertically, covering a relatively small area, and vertical fire pumps do not require a foundation, while horizontal fire pumps need to be equipped with a base.

    According to the different structures of the two pumps, it can be concluded that there is also a certain difference in the ease of maintenance of the two types of fire fighting pipeline pumps. The impeller of the vertical fire pump needs to be dismantled from top to bottom, which makes maintenance more difficult; the horizontal fire pump only needs to have the inlet pipe removed so that the impeller can be overhauled, which is relatively simple.

    Due to the different inlet and outlet pipe directions, the pipeline connection between vertical and horizontal is also different. As the vertical pump is a bottom-up structure, while the horizontal fire pump is longitudinally arranged on the base, so the motor of the vertical pump and the pump body are connected in the form of sub-mouth connection, while the horizontal pump needs to use couplings to connect with the motor, and the horizontal pipeline pump needs to be corrected regularly.

    Translated with www.DeepL.com/Translator (free version)