Fire-fighting truck water pump capable of automatically unloading
A fire truck and automatic unloading technology, which is applied to the components, pumps, and pump elements of the pumping device for elastic fluids, can solve problems such as permanent cure, and achieve the effect of preventing pipeline bursting.
Inactive Publication Date: 2008-07-09
张建明
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However, the applicant believes that the above-mentioned measures are all passive preventive measures that treat the symptoms but not the root cause, so it is necessary to improve
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[0017] Please refer to Figure 1, the pump body 1 is connected with the transmission of the gearbox 2, and the power output shaft of the gearbox 2 drives the pump body 1 to work. The gearbox 2 is fixed on the bracket 22, and the bracket 22 is fixed on the fire engine. The power input shaft 21 is connected with the power output shaft of the fire truck through a universal joint 211 . According to common knowledge, the pump body 1 must have a water inlet 11 and a water outlet 12, the water inlet 11 is connected to the water inlet pipe 111, and the water outlet 12 is connected to the water outlet pipe 121. As shown in the figure, the connection between the water inlet and outlet pipes 111, 121 and the water inlet and outlet ports 11, 12 is realized in the form of flange connection, and a sealing gasket is added. When the pump body 1 was driven by the gearbox 2 to work, the fire-fighting water was introduced into the water inlet 11 by the water inlet pipe 111 and then drawn from the...
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The invention provides a water pump used for a fire engine, which can relieve the pressure, and belongs to the technical field of a fire fighting device. The invention comprises a pump body with an inlet opening and an outlet opening, and a transmission case coupled with the pump body in a transmission way. The power input shaft of the transmission case is coupled with the power output shaft of the fire engine in a transmission way. The invention is characterized in that: an automatic pressure relieving device is arranged between the inlet opening and the outlet opening, and is used to form a water loop arranged between the inlet opening and the outlet opening. The invention has the advantages that: as the automatic pressure relieving device is arranged between the inlet opening and the outlet opening of the pump body, when a valve connected with the outlet pipe of outlet opening is closed suddenly during use, water pumped from the pump body is diverted to the inlet pipe of the inlet opening from the outlet pipe to form a water loop, thus pressure is relieved automatically. Accordingly, the systemic pressure of the pump does not rise suddenly, and the invention plays an effective role in protecting the pump body and sealing elements and preventing the pipes from bursting.
Description
technical field [0001] The invention belongs to the technical field of fire-fighting facilities, and in particular relates to a water pump for fire-fighting vehicles that can automatically relieve pressure. Background technique [0002] The known water pump for fire trucks mounted on fire trucks is shown in Fig. 1 and includes a pump body 1 with inlet and outlet ports 11, 12, a gearbox 2 that is connected to the pump body 1 and mounted on a bracket 22, The power input shaft 21 of the gearbox 2 is connected with the power output shaft of the fire truck through a universal joint 211 . The biggest problem with the water pump for fire trucks with the above structure is: the pump body 1 is easily damaged, the seals often fail, and the pipelines connected to the water inlet and outlet 11 and 12 burst from time to time, thereby affecting or even delaying precious firefighting opportunities. After long-term observation and in-depth analysis by the applicant, it is believed that the...
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IPC IPC(8): F04D29/00
Inventor 崔小锋翟存松
Owner 张建明