CN106884801A - A kind of water recovery apparatus with centrifugal pump - Google Patents

Abstract

The invention discloses a water return device used on a centrifugal pump, which comprises a centrifugal pump, a water suction pipe and a water outlet pipe. A check valve is arranged on the water suction pipe, and a branch return water pipe is arranged between the water outlet pipe and the water suction pipe. A valve is set on the return pipe of the branch; in this way, when the pump casing and the suction pipe need to be filled with water during the gap work, the valve can be opened to allow the water in the outlet pipe to pour back into the pump casing and suction pipe, which is similar to the existing manual filling method. Compared with that, the present invention has the advantages of convenient operation, manpower saving and high working efficiency.

Description

A water return device used in a centrifugal pump

technical field

The invention relates to a water return device used in a centrifugal pump, which belongs to the technical field of centrifugal pumps.

Background technique

Centrifugal pumps work by rotating the impeller to cause the water to move centrifugally. Before starting the pump, the pump casing and the suction pipe must be filled with water, and then the motor is started to drive the impeller and the water to rotate at a high speed. The water undergoes centrifugal motion and is thrown to the outer edge of the impeller, and flows through the volute pump casing. The pressure water pipeline flowing into the water pump. Therefore, when the centrifugal pump is working in the gap, it is often necessary to manually fill the pump casing and the suction pipe with water, which has defects such as low working efficiency and inconvenience.

Contents of the invention

The technical problem to be solved by the present invention is to provide a water return device used in a centrifugal pump, which has the advantages of simple structure, convenient operation, and labor saving, so as to overcome the deficiencies of the prior art.

The technical solution of the present invention is: a water return device used on a centrifugal pump, including a centrifugal pump, a water suction pipe and a water outlet pipe, a check valve is arranged on the water suction pipe, and a branch is arranged between the water outlet pipe and the water suction pipe The water return pipe is provided with a valve on the branch return water pipe.

A flow meter is installed on the water suction pipe or the water outlet pipe, the data port of the flow meter is connected with the PLC controller, and the PLC controller is connected with the control port of the centrifugal pump and the valve.

The beneficial effects of the present invention are: the present invention sets a branch return pipe between the water suction pipe and the water discharge pipe of the centrifugal pump, so that when the pump shell and the water suction pipe need to be filled with water during the gap work, the valve can be opened to make the water in the water discharge pipe The water is poured back into the pump casing and the water suction pipe. Compared with the existing manual pouring method, the present invention has the advantages of convenient operation, labor saving and high working efficiency.

Description of drawings

Fig. 1 is a structural representation of the present invention;

In the accompanying drawings: 1, centrifugal pump, 2, water suction pipe, 3, water outlet pipe, 4, check valve, 5, valve, 6, flow meter, 7, branch return water pipe.

detailed description

Below in conjunction with accompanying drawing and specific embodiment the invention is further introduced:

With reference to Fig. 1, the present invention is a kind of return water device that is used on the centrifugal pump, comprises centrifugal pump, water suction pipe 2 and water outlet pipe 3, is provided with check valve 4 on water suction pipe 2, in water outlet pipe 3 and water suction pipe 2 A branch return pipe 7 is arranged between them, and a valve 5 is arranged on the branch return pipe 7 .

As a further step of this embodiment, a flow meter 6 is installed on the water suction pipe 2 or the water outlet pipe 3, the data port of the flow meter 6 is connected to the PLC controller, the PLC controller is connected to the control port of the valve 5, and the PLC controls The controller is connected with the centrifugal pump, so that the PLC controller obtains its real-time working parameters from the centrifugal pump, and the PLC controller obtains flow monitoring data from the flow meter 6. At this time, when the centrifugal pump is still working, and the flow meter 6 transmits When the flow rate value is less than the preset value, the PLC controller controls the valve 5 to open, so that the water in the outlet pipe 3 flows back to the pump casing and the suction pipe 2. After it is filled, the centrifugal pump can pump water normally.

The valve 5 in the present invention is preferably an electric valve. .

The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be assumed that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field of the present invention, without departing from the concept of the present invention, some simple deduction or replacement can be made, which should be regarded as belonging to the protection scope of the present invention.

Claims (2)

1. A water return device used on a centrifugal pump, including a centrifugal pump (1), a water suction pipe (2) and a water outlet pipe (3), and a check valve (4) is arranged on the water suction pipe (2), which The feature is that a branch return pipe (7) is arranged between the water outlet pipe (3) and the water suction pipe (2), and a valve (5) is arranged on the branch return pipe (7). 2. The water return device used on a centrifugal pump according to claim 1, characterized in that: a flow meter (6) is installed on the water suction pipe (2) or the water outlet pipe (3), and the flow meter ( 6) The data port is connected to the PLC controller, and the PLC controller is connected to the control ports of the centrifugal pump (1) and the valve (5).