Vertical seal-free liquid surface sewage self-sucking pump

Abstract

The invention relates to a vertical seal-free liquid surface sewage self-sucking pump which is characterized in that a motor and a water pump supporting seat are assembled on a pool surface supporting plate; a pump body is assembled under the pool surface supporting plate through a pump cover, an intermediate connecting body and a bearing suspension frame body; no seal is arranged between a live spindle of a water pump and the pump cover, and therefore, a rear cover plate inside an impeller axial force balancing ring is open to the outside when the water pump works; the pump body is provided with a pump body water injection hole; and an outlet pipeline of the water pump is provided with an external hole for an exhaust valve. The vertical seal-free liquid surface sewage self-sucking pump which is provided by the invention is vertically mounted and is characterized in that the motor is arranged on a pool, the water pump is designed near a liquid surface under the pool, the axial length of the pump is not affected by the depth of a sewage pool, the pump has exhaust and self-absorption functions, and no bottom valve is assembled at the bottom of a suction pipe of the pump; in addition, the vertical seal-free liquid surface sewage self-sucking pump has the characteristics of small floor area, high efficiency, no pollution, no seal, low fault rate and convenience in split overhaul and maintenance.

Description

technical field [0001] The invention relates to a vertical self-priming pump, in particular to a vertical sewage self-priming pump without a sealed liquid surface. Background technique [0002] When the ordinary water pump adopts the liquid level installation method to absorb water from the lower pool, a bottom valve is installed at the bottom of the suction pipeline, and the entire suction pipeline must be filled with water before starting. However, the bottom valve often breaks down due to dirt being caught or not being tightly closed. It takes a lot of labor to eliminate these failures. Therefore, ordinary water pumps cannot be used to absorb and transport sewage from the lower pool by means of liquid surface installation. [0003] In the case that it is impossible to build an underground pump room and adopt the reverse irrigation installation method, the following three types of pumps are generally used for the existing sewage transportation: 1. Sewage and sewage submers...

AI Technical Summary

Problems solved by technology

But it also has the following defects: 1. The mechanical seal on the rotating shaft of the motor and the water pump may leak during use, and thus affect the safety of the motor; 2. When the sewage temperature is high or the concentration is high, it will be unfavorable to the motor. Normal heat dissipation with the bearing; 3. The motor and the water pump are completely immersed in corrosive media, and the service life is short; 4. The motor and the water pump share a rotating main shaft, and it will be very difficult to repair once worn out

The disadvantages are: 1. The shaft is long and heavy, and the bearing support points are many, which increases the mechanical friction and reduces the efficiency of the water pump; 2. When the sewage pool is deep, the axial length of the water pump is correspondingly longer, which not only increases the The manufacturing cost of the pump will increase the difficulty and cost of hoisting during the installation and maintenance of the pump; 3. The axial length of each pump needs to be determined according to the depth of the sewage tank, and the product has a low degree of generalization

Its main defects are: 1. The structure of the pump body is complicated, the internal circulation loss of the conveying medium is large, and the efficiency is 5% to 10% lower than that of the centrifugal pump of the same specification; The accumulation of sediment in the water storage chamber will cause the blockage of the return hole. Therefore, it is necessary to clean the water storage chamber of the pump body frequently according to the condition of the conveying medium; 3. During the working process of the pump, the mechanical failure of the pump system may lead to Sewage leakage, polluting the working face environment

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