The automatic coupling device of the submersible sewage pump comprises a coupling base, a coupling sliding plate, a guiding rod and an upper fixing plate, and an annular groove is formed on the contact surface of the coupling base and the coupling sliding plate, and a soft sealing pad is tightly fixed on the groove. With the above structure, the coupling contact surface of the coupling slide and the coupling base is sealed by the annular sealing groove.
The submersible sewage pump is fixed in the groove because the soft gasket is over-tightened. When the coupling sliding plate and the coupling base are coupled to each other, the soft gasket does not fall off the groove due to the relative movement of the two contact surfaces, thereby The sealing of the two contact faces is ensured. The submersible sewage pump is a kind of pump product that is connected with the motor and submerged into the liquid at the same time.
Advantages of the submersible sewage pump with automatic coupling:
1. Compact structure and small footprint. Because the submersible pump works under submerged liquid, it can be installed directly in the lagoon without the need to build a special pump room to install the pump and machine, which can save a lot of land and infrastructure costs. Easy to install and maintain. The small sewage pump can be installed freely. The large sewage pump is usually equipped with an automatic coupling device for automatic installation, which is quite convenient for installation and maintenance.
2. Continuous operation time is long. The sewage pump is coaxial with the pump and the motor, the shaft is short, and the rotating parts are light in weight. Therefore, the load (radial) on the bearing is relatively small, and the service life is much longer than that of the general pump. There are no problems such as cavitation damage and irrigation water. In particular, the latter point brings great convenience to the operator.
3. The drainage pumps used in buildings include submersible sewage pumps, submerged drainage pumps, vertical sewage pumps and horizontal sewage pumps. Because the general site in the building is small and the displacement is not large, the submersible sewage pump and the submerged drainage pump can be preferentially used in the drainage pump. The submerged sewage pump is generally used in important places; the vertical sewage pump and the horizontal sewage pump are required to be separated. The earthquake foundation, self-priming water absorption, and occupying a certain site, it is less used in the building. The flow rate of the drain pump should be selected according to the second flow of the domestic drainage design:
4. When there is displacement adjustment, it can be selected according to the maximum hourly flow rate of domestic drainage. The flow rate of the drainage pump in the fire elevator collecting pool is not less than 10L/s. The lift of the drain pump is calculated according to the height of the lift and the loss of the pipeline, and then a certain free head is attached. The free head should be 0.02~0.03MPa. The flow rate of the suction pipe and the outlet pipe of the drain pump should not be less than 0.7m/s, and should not be greater than 2.0m/s. In the public building, a spare pump should be set up in each living drainage basin as a unit, and it should be operated interactively. Drainage in the basement, equipment room, and garage flushing floor. If there are two or more drainage pumps, the pump may not be used.
5. When the collecting basin cannot set up the accident drain pipe, the pump should have an uninterrupted power supply; when the drain inlet pipe can be closed, there is no need for uninterrupted power supply, but an alarm device should be provided.
6. When lifting sewage and wastewater with large impurities, the outlet pipes of submersible sewage pumps in different collection pools should not be combined and discharged.
7. When upgrading general wastewater, the submersible sewage pump outlet pipes of different water collection tanks can be combined and discharged according to actual conditions. When two or more pumps share a single outlet, valves and check valves should be installed on each pump outlet. When a single pump drain may cause backflow, a check valve shall be provided. It is not allowed to combine the pressure drainage with the gravity drain in the building.
8. When the submersible sewage pump is lifted to contain large debris, the submersible sewage pump should be equipped with a crushing device; when lifting more sewage containing more fibrous materials, a large-channel submersible sewage pump should be used. When the motor power is greater than or equal to 7.5 kW or the outlet pipe diameter is greater than or equal to DN100, the pump can be used to fix the autotransformer;
9. When the submersible sewage pump motor power is less than 7.5kW or the outlet pipe diameter is less than DN100, the hose can be installed in a mobile installation. When the sewage collection basin is drained by the submersible sewage pump, a water pump fixed auto-coupling device shall be provided to facilitate the inspection of the water pump. The drain pump should be able to start and stop automatically and manually start and stop on site. Multiple pumps can be operated in parallel or in sections.
