Centrifugal pump vacuumizing device

Abstract

The utility model relates to a vacuum pumping device of a centrifugal pump, and belongs to the field of pump equipment. A centrifugal pump inlet pipeline of the centrifugal pump is connected with a suction pool, a centrifugal pump outlet pipeline of the centrifugal pump and one end of a vacuum pump pipeline are communicated and jointly connected with a centrifugal pump water supply valve, the other end of the vacuum pump pipeline is connected with the inlet end of a vacuum pump through a vacuum pump inlet valve, and the outlet end of the vacuum pump is connected with a vacuum pump drainage pipeline through a vacuum pump outlet valve. An upper cavity of the centrifugal pump is connected with one end of a vacuum pipeline above the centrifugal pump through an inlet end valve, the other end of the vacuum pipeline above the centrifugal pump is connected with a vacuum pump pipeline through an outlet end valve, and a pressure gauge is installed on an outlet pipeline of the centrifugal pump. According to the utility model, the centrifugal pump can be fully vacuumized, the self-suction capacity and the working efficiency of the 250S65A centrifugal pump can be effectively improved, the pump is ensured to be smoothly started, and the normal supply of a medium is ensured.

Description

Technical Field

[0001] The utility model relates to the field of pump equipment, in particular to a centrifugal pump vacuum device. Background Art

[0002] As we all know, 250S65A centrifugal pump has the characteristics of high head and large flow, and is widely used in the field of tire production. The impeller of 250S65A centrifugal pump is actually composed of two back-to-back impellers, and the water flowing out of the impellers merges into a volute. It is equivalent to two single-suction impellers of the same diameter working at the same time. The flow can be doubled under the same impeller outer diameter. The impeller structure is symmetrical, there is no axial force, and the operation is stable, which can meet the use requirements of large flow and high head in the field of tire production.

[0003] In the actual process, when the 250S65A centrifugal pump sucks a certain amount of liquid from the suction tank, there is gas. Since the gas pressure is too low, it is easy to generate vacuum in the centrifugal pump, resulting in evacuation. The vacuum pump needs to be turned on first to discharge the gas outside the pump to generate vacuum. Since the vacuum extraction is not thorough, there is air in the pump and pipeline, which affects the flow rate and lift requirements. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a centrifugal pump vacuuming device, which can ensure that the centrifugal pump is fully vacuumed.

[0005] The utility model adopts the following technical scheme to solve the technical problem: a centrifugal pump vacuum device is provided with a centrifugal pump, characterized in that a centrifugal pump inlet pipeline of the centrifugal pump is connected to a suction tank, a centrifugal pump outlet pipeline of the centrifugal pump is communicated with one end of a vacuum pump pipeline and are connected to a centrifugal pump water supply valve together, the other end of the vacuum pump pipeline is connected to an inlet end of the vacuum pump via a vacuum pump inlet valve, the outlet end of the vacuum pump is connected to a vacuum pump drainage pipeline via a vacuum pump outlet valve, the vacuum pump drainage pipeline is connected to a drainage tank, an upper cavity of the centrifugal pump is connected to one end of a vacuum pipeline above the centrifugal pump via an inlet end valve, the other end of a vacuum pipeline above the centrifugal pump is connected to the vacuum pump pipeline via an outlet end valve, and a pressure gauge is installed on the centrifugal pump outlet pipeline.

[0006] The beneficial effect of the utility model is that it can ensure that the centrifugal pump is fully vacuumed, can effectively improve the self-priming ability and working efficiency of the 250S65A centrifugal pump, ensure the smooth start-up of the pump, and ensure the normal supply of the medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0008] Figure 1 A schematic structural diagram of the utility model.

[0009] In the figure, 1. outlet valve, 2. pressure gauge, 3. inlet valve, 4. centrifugal pump, 5. vacuum pump drainage pipeline, 6. centrifugal pump water supply valve, 7. vacuum pump inlet valve, 8. vacuum pump outlet valve, 9. vacuum pump, 10. suction tank, 11. drainage tank, 12. vacuum pipeline above the centrifugal pump, 13. vacuum pump pipeline, 14. centrifugal pump inlet pipeline, 15. centrifugal pump outlet pipeline. DETAILED DESCRIPTION

[0010] In the figure, the utility model is provided with a centrifugal pump 4, a centrifugal pump inlet pipeline 14 of the centrifugal pump 4 is connected to a suction tank 10, a centrifugal pump outlet pipeline 15 of the centrifugal pump 4 is communicated with one end of a vacuum pump pipeline 13 and is commonly connected to a centrifugal pump water supply valve 6, the other end of the vacuum pump pipeline 13 is connected to the inlet end of a vacuum pump 9 via a vacuum pump inlet valve 7, the outlet end of the vacuum pump 9 is connected to a vacuum pump drainage pipeline 5 via a vacuum pump outlet valve 8, the vacuum pump drainage pipeline 5 is connected to a drainage tank 11, the upper cavity of the centrifugal pump 4 is connected to one end of a vacuum pipeline 12 above the centrifugal pump via an inlet end valve 3, the other end of the vacuum pipeline 12 above the centrifugal pump is connected to the vacuum pump pipeline 13 via an outlet end valve 1, and a pressure gauge 2 is installed on the centrifugal pump outlet pipeline 15.

[0011] The vacuum pump 9 evacuates the vacuum pump pipeline 13, the 250S65A centrifugal pump 4, and the centrifugal pump inlet pipeline 14, wherein the vacuum pump pipeline 13 is connected to the inlet of the vacuum pump 9, the centrifugal pump outlet pipeline 15 is communicated with the vacuum pump pipeline 13, the centrifugal pump inlet pipeline 14 penetrates into the suction pool 10, and the vacuum pump drainage pipeline 5 is located above the drainage pool 11. Before the operation of 250S65A centrifugal pump 4, start vacuum pump 9 first, close centrifugal pump water supply valve 6, open vacuum pump inlet valve 7 and vacuum pump outlet valve 8, vacuum pump 9 discharges the gas in vacuum pump pipeline 13, 250S65A centrifugal pump 4 and centrifugal pump inlet pipeline 14 to drainage pool 11. Due to incomplete vacuuming, there is gas above 250S65A centrifugal pump 4. Open outlet valve 1 and inlet valve 3. After the vacuum pipeline 12 above the centrifugal pump above 250S65A centrifugal pump 4 is filled with the medium, the normal operation of 250S65A centrifugal pump 4 is guaranteed. Open 250S65A centrifugal pump 4. The pressure of pressure gauge 2 on centrifugal pump outlet pipeline 15 meets the process requirements. Close outlet valve 1, inlet valve 3, vacuum pump inlet valve 7 and vacuum pump outlet valve 8. Open centrifugal pump water supply valve 6 to lead to the use of equipment in various production areas.

Claims

1. A centrifugal pump vacuum device, provided with a centrifugal pump, characterized in that: The centrifugal pump inlet pipeline of the centrifugal pump is connected to the suction tank, the centrifugal pump outlet pipeline of the centrifugal pump is connected to one end of the vacuum pump pipeline and are connected to the centrifugal pump water supply valve together, the other end of the vacuum pump pipeline is connected to the inlet end of the vacuum pump through the vacuum pump inlet valve, the outlet end of the vacuum pump is connected to the vacuum pump drainage pipeline through the vacuum pump outlet valve, the vacuum pump drainage pipeline is connected to the drainage tank, the upper cavity of the centrifugal pump is connected to one end of the vacuum pipeline above the centrifugal pump through the inlet end valve, the other end of the vacuum pipeline above the centrifugal pump is connected to the vacuum pump pipeline through the outlet end valve, and a pressure gauge is installed on the centrifugal pump outlet pipeline.

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