Submersible sewage pump coupling and lifting device and mounting method thereof

Abstract

The invention discloses a submersible sewage pump coupling and lifting device. The submersible sewage pump coupling and lifting device comprises a coupling seat, a coupling frame, a limiting seat, a guider and a submersible sewage pump, two positioning blocks are symmetrically arranged on the two sides of an inlet flange of the coupling seat, two positioning grooves are symmetrically formed in thetwo sides of a flange of the coupling frame, and two C-shaped guide grooves are symmetrically formed in the two sides of the upper portion of the flange of the coupling frame; the coupling frame is connected with an outlet flange of the submersible sewage pump through a bolt and is positioned through two taper pins which are symmetrically arranged on the two sides of the flange; and the couplingseat and the coupling frame are positioned and connected through a positioning inclined plane (1) of the positioning block and a positioning inclined plane (2) of the positioning groove and a flange inclined plane (1) of the coupling seat and a flange inclined plane (2) of the coupling frame, so that the coupling of the submersible sewage pump and the outlet pipeline is realized; the limiting seatis arranged below an inlet of the submersible sewage pump and is used for limiting the transverse displacement of the submersible sewage pump; and the guider is used for guiding steel wire ropes forhoisting and distributing acting force of the left steel wire rope and the right steel wire rope. The coupling and lifting device is applied to coupling and lifting of the large submersible sewage pump with the opening diameter 300 mm or above, coupling and lifting are convenient, sealing is reliable, maintenance is easy and convenient, the service life is long, and the maintenance cost is low.

Description

technical field [0001] The invention relates to the field of sewage pumps, in particular to a coupling and lifting device for submersible sewage pumps. Background technique [0002] The submersible sewage pump coupling and lifting device is used for the automatic coupling connection and sealing of the submersible sewage pump and the outlet pipeline, and at the same time can lift the submersible sewage pump for maintenance. [0003] The coupling and lifting devices in the prior art are mostly used for small submersible sewage pumps with diameters below 300mm, and the technology for coupling and lifting devices for large submersible sewage pumps with diameters above 300mm is mostly not very mature. The coupling and positioning surfaces are all arranged above the flange, which generates unilateral eccentric pressing force, making it difficult to seal the lower side of the coupling flange surface. Secondly, the coupling device in the prior art is not equipped with lateral limit...

AI Technical Summary

Problems solved by technology

Both the coupling and positioning surfaces are set above the flange, resulting in unilateral eccentric pressing force, which makes it difficult to seal under the coupling flange surface

Secondly, the coupling device in the prior art is not equipped with lateral limit measures, resulting in lateral misalignment of the coupling flange surface in most cases, making it difficult to achieve coupling and sealing

In addition, the positioning surface of the coupling device in the prior art is easily worn, thereby reducing the coupling and positioning accuracy

Finally, the hoisting position of the lifting device in the prior art is set on the top of the motor, and it is difficult to be on the same vertical line as the resultant force of gravity and coupling force. At this time, a rotational moment will be generated to make the gap between the positioning surfaces or between the guide rod and the coupling frame stuck between them, eventually leading to failure of the lifting device

[0004] In summary, the prior art submersible sewage pump coupling and lifting device, especially for large submersible sewage pumps, is difficult to achieve coupling sealing and lifting, high failure rate, low service life, and increased maintenance time and cost

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