Auxiliary centrifugal pump of screw pump

Abstract

The screw pump auxiliary centrifugal pump comprises a centrifugal pump body, a centrifugal pump main shaft is arranged in the centrifugal pump body in a penetrating mode, a driving device is arranged on the outer side of the centrifugal pump body, the power output end of the driving device is connected with the centrifugal pump main shaft, an impeller mechanism is arranged in the centrifugal pump body, and the impeller mechanism is connected with the centrifugal pump main shaft. The centrifugal pump body is provided with a water inlet pipe and a centrifugal pump water outlet, and the water inlet pipe is provided with a water inlet; a screw pump body is fixedly connected to the centrifugal pump body, a screw pump inlet and a screw pump outlet are formed in the screw pump body, a screw pump stator is arranged in the screw pump body, a screw pump screw shaft is arranged in the screw pump stator, and the screw pump screw shaft is connected with a centrifugal pump main shaft through a transmission mechanism. An inlet of the screw pump is connected with one end of a water diversion pipe through a pipeline, and the other end of the water diversion pipe is connected with the side wall of the water inlet pipe. The screw pump and the centrifugal pump are combined, rapid starting of the centrifugal pump is achieved through the water diversion function of the screw pump, the operation efficiency of the pump and the equipment stability are improved, and the screw pump is suitable for more application scenes.

Description

Technical Field

[0001] The utility model relates to the field of machinery, in particular to a water pump, and more particularly to a screw pump-assisted centrifugal pump. Background Art

[0002] A centrifugal pump is a pump that relies on the centrifugal force generated during the rotation of an impeller to transport liquid. Before starting, a centrifugal pump usually needs to be pre-filled with water in the pump chamber and the inlet pipe to form a vacuum. This process is complex and time-consuming. Especially in large pumping stations or high-lift application scenarios, the water priming operation is more cumbersome. And if the operation is improper, it is easy to cause the centrifugal pump to fail to start normally or run idly, which may lead to equipment wear or damage.

[0003] Generally speaking, the centrifugal pumps in the prior art generally have the following disadvantages:

[0004] 1. Complicated water priming: When starting a conventional centrifugal pump, it must rely on manual or additional vacuum equipment for water priming operation, which is not only time-consuming and laborious, but also has problems such as water leakage or insufficient water priming.

[0005] 2. Prone to idling: If the water priming is insufficient or the operation is improper, the centrifugal pump may run idly during startup, resulting in overheating of the pump body, and being prone to wear or even damage.

[0006] 3. Strong equipment dependence: In order to automatically prime water, it is usually necessary to additionally install a vacuum priming device, which increases the equipment cost and maintenance difficulty.

[0007] 4. Application limitations: The existing centrifugal pump has inconvenient water priming operation, which limits its wide application in remote or unattended water conservancy facilities. Summary of the Invention

[0008] The purpose of the utility model is to provide a screw pump-assisted centrifugal pump, and the screw pump-assisted centrifugal pump is to solve the technical problems of difficult water priming and complex operation of the centrifugal pump in the prior art.

[0009] A screw pump-assisted centrifugal pump of the utility model includes a centrifugal pump body, a centrifugal pump main shaft is arranged through the centrifugal pump body, a driving device is arranged outside the centrifugal pump body, the power output end of the driving device is connected to the centrifugal pump main shaft, an impeller mechanism is arranged in the centrifugal pump body, the impeller mechanism is connected to the centrifugal pump main shaft, a water inlet pipe and a centrifugal pump water outlet are arranged on the centrifugal pump body, and a water inlet is arranged on the water inlet pipe; a screw pump body is fixedly connected to the centrifugal pump body, a screw pump inlet and a screw pump outlet are arranged on the screw pump body, a screw pump stator is arranged in the screw pump body, a screw pump screw shaft is arranged in the screw pump stator, and the screw pump screw shaft is connected to the centrifugal pump main shaft through a transmission mechanism; one end of a water diversion pipe is connected to the screw pump inlet through a pipeline, and the other end of the water diversion pipe is connected to the side wall of the water inlet pipe.

[0010] Furthermore, the transmission mechanism is a belt transmission mechanism. The belt transmission mechanism includes two belt pulleys, a belt is connected between the two belt pulleys, one of the belt pulleys is connected to the main shaft of the centrifugal pump, and the other belt pulley is connected to the screw shaft of the screw pump through a transmission shaft and a universal joint.

[0011] Furthermore, a valve is provided on the pipeline.

[0012] Furthermore, the driving device is an electric motor.

[0013] Furthermore, a bracket is provided at the bottom of the centrifugal pump.

[0014] Compared with the prior art, the effects of the present utility model are positive and obvious. The present utility model combines a screw pump and a centrifugal pump. Through the water intake function of the screw pump, the rapid start of the centrifugal pump is realized, the operation efficiency of the pump and the equipment stability are improved, and it is suitable for more application scenarios, especially in the application of water pump systems with high lift or in remote areas. It simplifies the operation, reduces the risk of idling and equipment dependence, and improves the start-up efficiency and stability of the centrifugal pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front sectional view schematic diagram of a screw pump-assisted centrifugal pump of the present utility model.

[0016] Figure 2 It is a side view schematic diagram of a screw pump-assisted centrifugal pump of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The present utility model will be further described below in conjunction with embodiments. However, the present utility model is not limited to these embodiments. Any similar structures and similar changes using the present utility model shall fall within the protection scope of the present utility model. The use of directions such as up, down, front, back, left, and right in the present utility model is only for the convenience of clear description and does not limit the technical solution of the present utility model.

[0018] Such as Figure 1 - Figure 2As shown in the figure, a screw pump-assisted centrifugal pump of the present utility model includes a centrifugal pump body 8. A centrifugal pump main shaft 15 passes through the centrifugal pump body 8. A driving device is arranged outside the centrifugal pump body 8, and the power output end of the driving device is connected to the centrifugal pump main shaft 15. An impeller mechanism 13 is arranged in the centrifugal pump body 8, and the impeller mechanism 13 is connected to the centrifugal pump main shaft 15. A water inlet pipe 14 and a centrifugal pump water outlet 10 are arranged on the centrifugal pump body 8, and a water inlet 12 is arranged on the water inlet pipe 14; A screw pump body 6 is fixedly connected to the centrifugal pump body 8. A screw pump inlet 3 and a screw pump outlet are arranged on the screw pump body 6. A screw pump stator 2 is arranged in the screw pump body 6, and a screw pump screw shaft 1 is arranged in the screw pump stator 2. The screw pump screw shaft 1 is connected to the centrifugal pump main shaft 15 through a transmission mechanism 5; One end of a water diversion pipe 11 is connected to the screw pump inlet 3 through a pipeline, and the other end of the water diversion pipe 11 is connected to the side wall of the water inlet pipe 14.

[0019] Further, the transmission mechanism 5 is a belt transmission mechanism 5. The belt transmission mechanism 5 includes two belt pulleys, a belt is connected between the two belt pulleys, one of the belt pulleys is connected to the centrifugal pump main shaft 15, and the other belt pulley is connected to the screw pump screw shaft 1 through a transmission shaft and a universal joint 4.

[0020] Further, a valve 9 is arranged on the pipeline.

[0021] Further, the driving device is a motor.

[0022] Further, a bracket 7 is arranged at the bottom of the centrifugal pump.

[0023] Specifically, the centrifugal pump body 8, the centrifugal pump main shaft 15, the driving device, the impeller mechanism 13, the screw pump body 6, the screw pump screw shaft 1, the transmission mechanism 5, etc. in this embodiment all adopt well-known solutions in the prior art, which are all understood by those skilled in the art and will not be elaborated here.

[0024] The working principle of this embodiment: During operation, the water inlet is connected to the water source. The driving device drives the centrifugal pump main shaft 15 to rotate, driving the impeller mechanism 13 to work. At the same time, the centrifugal pump main shaft 15 drives the screw pump screw shaft 1 to work through the transmission mechanism 5. Due to the continuous change of the volume between the screw shaft and the stator, air is continuously discharged until the screw pump evacuates the air in the water inlet pipe 14, and a vacuum is formed in the water inlet pipe 14. The water source sends water into the water inlet pipe 14 through the centrifugal pump water inlet 12, and the centrifugal pump pumps away the water in the water inlet pipe 14.

[0025] This utility model combines a screw pump and a centrifugal pump. Through the water diversion function of the screw pump, it realizes the rapid startup of the centrifugal pump, improves the operation efficiency of the pump and the equipment stability, adapts to more application scenarios, especially in the application of water pump systems in high-lift or remote areas, simplifies the operation, reduces the risk of idling and equipment dependence, and enhances the startup efficiency and stability of the centrifugal pump.

Claims

1. A screw pump-assisted centrifugal pump, characterized in that, It includes a centrifugal pump body, in which a centrifugal pump main shaft is penetrated. A driving device is arranged outside the centrifugal pump body, and the power output end of the driving device is connected to the centrifugal pump main shaft. An impeller mechanism is arranged in the centrifugal pump body, and the impeller mechanism is connected to the centrifugal pump main shaft. A water inlet pipe and a centrifugal pump water outlet are arranged on the centrifugal pump body, and a water inlet is arranged on the water inlet pipe; a screw pump body is fixedly connected to the centrifugal pump body, a screw pump inlet and a screw pump outlet are arranged on the screw pump body, a screw pump stator is arranged in the screw pump body, a screw pump screw shaft is arranged in the screw pump stator, and the screw pump screw shaft is connected to the centrifugal pump main shaft through a transmission mechanism; one end of a water diversion pipe is connected to the screw pump inlet through a pipe, and the other end of the water diversion pipe is connected to the side wall of the water inlet pipe.

2. The screw pump-assisted centrifugal pump according to claim 1, characterized in that, The transmission mechanism is a belt transmission mechanism, and the belt transmission mechanism includes two belt pulleys. A belt is connected between the two belt pulleys. One of the belt pulleys is connected to the centrifugal pump main shaft, and the other belt pulley is connected to the screw pump screw shaft through a transmission shaft and a universal joint.

3. The screw pump-assisted centrifugal pump according to claim 1, characterized in that, A valve is arranged on the pipe.

4. A screw pump-assisted centrifugal pump according to claim 1, wherein, The driving device is a motor.

5. A screw pump-assisted centrifugal pump according to claim 1, characterized in that, A bracket is arranged at the bottom of the centrifugal pump.

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