Water jet leakage preventing coupling device

Abstract

The invention relates to a water jet leakage preventing coupling device. The water jet leakage preventing coupling device comprises a blow-down pump, a coupling base, a coupling flange and a guide rail. The bottom of the guide rail is fixed to the coupling base, and a conical outlet is formed in the middle of the coupling flange. A conical inlet is formed in the left end of the coupling base, andone end of the blow-down pump is connected with the coupling flange. The coupling flange can slide off to the bottom along the guide rail, so that the base and the coupling flange communicate, and theconical outlet is aligned to the conical inlet. The water jet leakage preventing coupling device is provided with the coupling flange with the conical outlet and the conical inlet and the coupling base, so that negative pressure is formed by matched faces between the coupling flange and the coupling base when the blow-down pump operates, and sewage cannot be leaked; and the water jet leakage preventing coupling device is stable and reliable, simple in structure, convenient to operate, economical and practical.

Description

technical field [0001] The invention relates to the technical field of urban water supply and drainage, in particular to a water jet anti-leakage coupling device. Background technique [0002] With the development of urbanization, the urban population is increasing, and the construction of urban infrastructure is also accelerating, especially for the treatment of sewage, rainwater and industrial wastewater. Among them, the most widely used equipment is the submersible sewage pump. The submersible sewage pump operates underwater, and the water outlet needs to be connected with the water outlet flange. When the sewage pump fails and needs to be repaired, the sewage in the foundation pit will bring great inconvenience to the maintenance, or it cannot be repaired. The coupling device that came into being solves this problem very well, so that the water pump and the water outlet pipeline are actively connected. When the water pump needs to be repaired, the water pump can be lifte...

AI Technical Summary

Problems solved by technology

[0002] With the development of urbanization, the urban population is increasing, and the construction of urban infrastructure is also accelerating, especially for the treatment of sewage, rainwater and industrial wastewater. Among them, the most widely used equipment is the submersible sewage pump. The submersible sewage pump operates underwater, and the water outlet needs to be connected with the water outlet flange. When the sewage pump fails and needs to be repaired, the sewage in the foundation pit will bring great inconvenience to the maintenance, or it cannot be repaired. The coupling device that came into being solves this problem very well, so that the water pump and the water outlet pipeline are actively connected. When the water pump needs to be repaired, the water pump can be lifted out of the sewage at any time, and the water pump can be well removed when the repair is completed. However, the coupling devices used in the market have poor sealing performance, especially when some high-lift pumps are started, the gap between the pump and the coupling device will increase, resulting in a large amount of sewage leakage, so Not only will it affect the efficiency of the water pump, but in severe cases, the water pump will burn the motor, causing greater economic losses

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