CN210033875U - Emptying device of centrifugal pump - Google Patents

Abstract

The utility model discloses a centrifugal pump emptying device, including centrifugal pump, check valve, drain pipe, spouting aspirator, drain valve, catheter, evacuation valve, evacuation pipe, the drain pipe is connected to the exit end of centrifugal pump, be provided with the check valve on the drain pipe, spout the import pipe feed liquor end connection catheter of aspirator, be provided with the drain valve on the catheter, before the catheter is connected and the junction is located liquid direction check valve with the drain pipe, spout the side branch union coupling evacuation pipe of aspirator, set up evacuation valve on the evacuation pipe, evacuation pipe and centrifugal pump cavity intercommunication. The utility model discloses simple structure, it is easy and simple to handle to use, and automated control utilizes the liquid that has certain pressure that stores up in the drain pipe to provide the energy, and the discharge is inhaled away to the interior air of centrifugal pump, need not other energy and provides power.

Description

Emptying device of centrifugal pump

Technical Field

The utility model belongs to the technical field of exhaust apparatus, concretely relates to centrifugal pump emptying devices.

Background

The centrifugal pump is a machine for conveying liquid or pressurizing liquid, liquid at a lower part is conveyed to a higher part, when the water level is lower than an exhaust port of the centrifugal pump, gas in a cavity of the centrifugal pump needs to be exhausted, otherwise, the centrifugal pump can vibrate greatly, water cannot be discharged and other faults can be caused. In order to avoid the above situations, the traditional method is that a bottom valve is usually installed at the bottom of a water suction pipeline, and the centrifugal pump is filled with water before being started, but the bottom valve is often jammed, leaks water and the like in the use process, and the suction resistance of the centrifugal pump is increased, so that the service life of the centrifugal pump is shortened and the electric power resource is wasted; the vacuum pump is operated to form negative pressure, and the exhaust hole of the centrifugal pump is connected with the vacuum pump, so that the gas in the cavity of the centrifugal pump is forcibly exhausted, but the vacuum pump has high failure rate and high maintenance difficulty, and the operation also needs energy.

Therefore, the key point for solving the problems is to develop a centrifugal pump emptying device which can discharge air in a centrifugal pump without a bottom valve and additional energy consumption.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a centrifugal pump emptying devices.

The utility model aims to realize the purpose that the device comprises a centrifugal pump, a check valve, a liquid outlet pipe, a spraying and sucking device, a liquid guide valve, a liquid guide pipe, an emptying valve and an emptying pipe, the outlet end of the centrifugal pump is connected with a liquid outlet pipe, a check valve is arranged on the liquid outlet pipe, the spraying and sucking device comprises a shell, an inlet pipe, an outlet pipe and a side branch pipe, the shell is connected with an inlet pipe and an outlet pipe which are communicated with each other, a cavity is formed among the inlet pipe extension part, the inlet end of the outlet pipe and the shell, the side branch pipe is arranged on the shell, the inlet pipe, the outlet pipe and the side branch pipe are communicated with the chamber, the liquid inlet end of the inlet pipe is connected with a liquid guide pipe, a liquid guide valve is arranged on the liquid guide pipe, the liquid guide pipe is connected with the liquid outlet pipe, the connection position is positioned in front of the check valve in the liquid outlet direction, the side branch pipe is connected with an emptying pipe, an emptying valve is arranged on the emptying pipe, and the emptying pipe is communicated with the cavity of the centrifugal pump.

Compared with the prior art, the utility model discloses following technological effect has:

1. the ejector is adopted, the liquid with certain pressure stored in the liquid outlet pipe can be used for providing energy, when the pressure liquid passes through the ejector, the liquid flows quickly to enable the cavity to form negative pressure, air in the centrifugal pump is sucked and discharged, and other energy sources are not needed for providing power;

2. the spraying and sucking device adopts adjustable threaded connection, and can adjust the distance between the outlet pipe and the inlet pipe so as to adapt to liquid outlet pipes with different hydraulic pressures and enlarge the application range of the spraying and sucking device.

3. And an electromagnetic valve is adopted, so that the automatic control is convenient to realize, and the labor intensity is reduced.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure of the ejector;

in the figure: 1-centrifugal pump, 2-pump outlet valve, 3-liquid outlet pipe, 4-spraying and sucking device, 401-shell, 402-inlet pipe, 403-outlet pipe, 404-side branch pipe, 405-fixing nut, 5-liquid guide valve, 6-liquid guide pipe, 7-emptying valve, 8-emptying pipe, 9-check valve and 10-liquid suction pipe.

Detailed Description

The following description of the present invention is provided with reference to the accompanying drawings, which are not intended to limit the present invention in any way, and any alterations or replacements made based on the teachings of the present invention are all within the protection scope of the present invention.

The utility model discloses a centrifugal pump 1, check valve 9, drain pipe 3, spout aspirator 4, drain valve 5, catheter 6, evacuation valve 7, evacuation pipe 8 as shown in figure 1, the exit end of centrifugal pump 1 is connected drain pipe 3, be provided with check valve 9 on the drain pipe 3, spout aspirator 4 includes casing 401, import pipe 402, outlet pipe 403, collateral branch 404, casing 401 is connected with import pipe 402 and outlet pipe 403 that link up each other, forms the cavity between import pipe 402 extension, outlet pipe 403 inlet end, the casing 401, collateral branch 404 sets up on casing 401, import pipe 402, outlet pipe 403, collateral branch 404 all communicate with each other with the cavity, import pipe 402 inlet end is connected catheter 6, is provided with drain valve 5 on the catheter 6, and catheter 6 is connected with drain pipe 3 and the junction is located play liquid direction check valve 9, the side branch pipe 404 is connected with an emptying pipe 8, an emptying valve 7 is arranged on the emptying pipe 8, and the emptying pipe 8 is connected with an exhaust hole of the centrifugal pump 1 and communicated with a cavity of the centrifugal pump.

The inner hole of the extension part of the inlet pipe 402 is in a step shape and comprises a conical hole section and a straight hole section, the aperture of the conical hole section is transited to the straight hole section from large to small, and the straight hole section extends to be the outlet of the inlet pipe 402.

The inlet pipe 402 extends as a cone.

The housing 401 is threaded with both the inlet tube 402 and the outlet tube 403.

The inlet pipe 402 and the outlet pipe 403 are provided with external threads, and the shell 401 is provided with matched internal threads.

The ejector 4 further comprises a fixing nut 405, the fixing nut 405 being provided on the outlet pipe 403.

Still include pump outlet valve 2, pump outlet valve 2 sets up on drain pipe 3 and is located between centrifugal pump 1 and the check valve 9.

The pump outlet valve 2, the liquid guide valve 5 and the emptying valve 7 are electromagnetic valves.

The utility model discloses theory of operation and working process: after the centrifugal pump 1 conveys liquid from a low position to a high position, the pump outlet valve 2 is closed after the centrifugal pump is shut down usually, liquid with certain pressure is reserved in the liquid outlet pipe 3 under the action of the check valve 9, the stored liquid is sprayed at high speed through the extension part of the inlet pipe (402) of the spraying and sucking device (4), the pressure energy is converted into speed energy, air in the cavity of the spraying and sucking device (4) is driven to be discharged outwards, the cavity generates negative pressure, and air in the centrifugal pump 1 and the liquid suction pipe 10 thereof is sucked away and discharged, so that the emptying operation before the centrifugal pump 1 is started is realized.

Claims (8)

1. The utility model provides a centrifugal pump emptying devices, includes centrifugal pump (1), check valve (9), drain pipe (3), spouts aspirator (4), drain valve (5), catheter (6), evacuation valve (7), evacuation pipe (8), drain pipe (3), characterized by are connected to the exit end of centrifugal pump (1): the liquid outlet pipe (3) is provided with a check valve (9), the spraying and sucking device (4) comprises a shell (401), an inlet pipe (402), an outlet pipe (403) and a side branch pipe (404), the shell (401) is connected with the inlet pipe (402) and the outlet pipe (403) which are communicated with each other, a cavity is formed among an extension part of the inlet pipe (402), an inlet end of the outlet pipe (403) and the shell (401), the side branch pipe (404) is arranged on the shell (401), the inlet pipe (402), the outlet pipe (403) and the side branch pipe (404) are communicated with the cavity, a liquid inlet end of the inlet pipe (402) is connected with a liquid guide pipe (6), the liquid guide pipe (6) is provided with a liquid guide valve (5), the liquid guide pipe (6) is connected with the liquid outlet pipe (3), the connection part of the liquid guide pipe (6) is positioned in front of the check valve (9) in the liquid outlet direction, the side branch pipe, the emptying pipe (8) is connected with the exhaust hole of the centrifugal pump (1) and is communicated with the cavity of the centrifugal pump.

2. A centrifugal pump emptying device according to claim 1, wherein: the inner hole of the extension part of the inlet pipe (402) is in a step shape and comprises a conical hole section and a straight hole section, the aperture of the conical hole section is transited to the straight hole section from large to small, and the straight hole section extends to be the outlet of the inlet pipe (402).

3. A centrifugal pump emptying device according to claim 1, wherein: the inlet tube (402) extension is a cone.

4. A centrifugal pump emptying device according to claim 1, wherein: the shell (401) is in threaded connection with the inlet pipe (402) and the outlet pipe (403).

5. A centrifugal pump emptying device according to claim 4, wherein: the inlet pipe (402) and the outlet pipe (403) are provided with external threads, and the shell (401) is provided with matched internal threads.

6. A centrifugal pump emptying device according to claim 1, wherein: the sprayer (4) further comprises a fixing nut (405), and the fixing nut (405) is arranged on the outlet pipe (403).

7. A centrifugal pump emptying device according to claim 1, wherein: still include pump outlet valve (2), pump outlet valve (2) set up on drain pipe (3) and are located between centrifugal pump (1) and check valve (9).

8. A centrifugal pump emptying device according to claim 7, wherein: the pump outlet valve (2), the liquid guide valve (5) and the emptying valve (7) are electromagnetic valves.

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