Direct connection vertical type sewage pump

Abstract

The invention discloses a direct connection vertical type sewage pump. The direct connection vertical type sewage pump comprises a pump cover and a pump body; and an electric motor is arranged on thetop of the pump cover. The direct connection vertical type sewage pump is characterized in that a detachable suck-in base is arranged below the pump body; an impeller is detachably arranged on a motorlengthened shaft of the electric motor; the pump cover is provided with a mechanical seal which is connected to the motor lengthened shaft in a sleeving manner; an integrally formed bent pipe type water inflow flow channel is arranged in the suck-in base; the pump cover is provided with a backflow hole, a gas collecting chamber and an exhaust valve; the impeller is provided with an inner balancegroove and an outer balance groove; and when the impeller rotates, the inner balance groove and the backflow hole form a forced ring flow. The force ring flow formed when the inner balance groove formed in the impeller rotates continuously cools and washes the mechanical seal, the running environment of the mechanical seal is improved, and the service life is prolonged.

Description

technical field [0001] The invention relates to a sewage pump, more precisely, a direct-connected vertical sewage pump. Background technique [0002] Sewage pumps are used in petrochemical, papermaking, printing and dyeing, environmental protection, construction, municipal engineering and urban sewage treatment industries to convey sewage and sewage with solid particles and fibrous substances. The working environment of the sewage pump is harsh. The interference of solid particles and fibrous substances in the sewage during the operation of the pump makes the flow velocity uneven, the hydraulic loss of the flow field is large, and the efficiency is reduced. Large and easy to damage; when the conveyor belt has long fiber debris, it is easy to wind at the impeller inlet, reducing the flow capacity of the impeller until the flow path is blocked, requiring frequent maintenance and cleaning, restricting work efficiency and service life, and increasing maintenance and operating co...

AI Technical Summary

Problems solved by technology

The working environment of the sewage pump is harsh. The interference of solid particles and fibrous substances in the sewage during the operation of the pump makes the flow velocity uneven, the hydraulic loss of the flow field is large, and the efficiency is reduced. Large and easily damaged; when the conveyor belt has long fiber debris, it is easy to wind at the impeller inlet, reducing the flow capacity of the impeller until the flow path is blocked, requiring frequent maintenance and cleaning, restricting work efficiency and service life, and increasing maintenance and operating costs

[0003] The existing vertical sewage pumps have the following disadvantages: 1) There is a deviation in the coaxiality of the coupling transmission, which affects the operation stability; 2) The hydraulic balance of the flow field is poor, the hydraulic loss is large, the vibration is large, and the efficiency 3) Weak passing capacity of solid particles; 4) Poor anti-winding measures; 5) The impeller balance measures are simple, the axial force is large, and the bearing life is short; 6) The operating environment of the mechanical seal is not ideal and the life is short; 7) Imported The unreasonable design of the flow channel restricts the flow and anti-winding capabilities

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