CN217270887U - Centrifugal pump non return system and sewage treatment line - Google Patents

Abstract

The utility model discloses a centrifugal pump non return system and sewage treatment line relates to environmental protection and purifies technical field, has solved the problem that current check valve easily received the water hammer to damage and can't change on line, has improved work efficiency, and the concrete scheme is as follows: including a plurality of sets of centrifugal pumps, the pump mouth of every centrifugal pump of group all communicates the outlet conduit of a vertical setting, is equipped with a check valve on the outlet conduit, the rear end intercommunication a horizontal blow-down pipe that sets up of check valve, the lateral part of blow-down pipe is equipped with an atmospheric valve, and the end of blow-down pipe is equipped with a trip valve, and the blow-down pipe on every centrifugal pump of group all with collect the pipeline intercommunication.

Description

Centrifugal pump non return system and sewage treatment line

Technical Field

The utility model belongs to the technical field of the environmental protection purification technique and specifically relates to a centrifugal pump non return system and sewage treatment line.

Background

The statements herein merely provide background related to the present disclosure and may not necessarily constitute prior art.

When the centrifugal pump is stopped or in emergency, liquid in the outlet pipeline of the pump flows back to enable the pump to rotate reversely, and when the height of the pipeline is high, the liquid in the outlet pipeline flows back to form a water hammer to cause serious impact on blades in the pump. Therefore, a check valve is required to be arranged at the outlet of the centrifugal pump to prevent liquid from flowing back, so that equipment such as a blade or a coupling in the pump is prevented from being broken down.

The inventor finds that the traditional check valve cannot ensure the complete protection of hydraulic impact on the centrifugal pump, when the check valve is improperly arranged or the hydraulic impact is greater than the bearing pressure of the check valve, the problems of failure of the check valve, damage to blades of the centrifugal pump and the like can be caused, and in case of serious, liquid in a pipeline can flow back to the interior of a workshop, so that serious safety accidents occur; and the check valve can't guarantee anterior segment pipeline pressure release when changing, and the unloading can't be done to liquid in the check valve, and the check valve can't be changed on line.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a centrifugal pump non return system and sewage treatment line, set up a plurality of sets of centrifugal pumps, every centrifugal pump of group is equipped with a check valve to set up an unloading pipeline in the rear end of every check valve, utilize unloading valve and trip valve on the unloading pipeline to realize emptying, cutting off of check valve, solved current check valve and easily receive the problem that the water hammer damaged and can't change on line.

In order to achieve the above purpose, the present invention is realized by the following technical solution:

in a first aspect, the embodiment of the utility model provides a centrifugal pump non return system, including a plurality of centrifugal pumps of group, the pump mouth of every centrifugal pump of group all communicates the outlet pipe of a vertical setting, is equipped with a check valve on the outlet pipe, the rear end of check valve communicates the blow-down pipe of a horizontal setting, the lateral part of blow-down pipe is equipped with an atmospheric valve, and the end of blow-down pipe is equipped with a trip valve, and the blow-down pipe on every centrifugal pump of group all with collect the pipeline intercommunication.

As a further implementation mode, the emptying valve is installed horizontally.

As a further implementation mode, the emptying valve is communicated with a drainage pipeline outwards, and the drainage pipeline is communicated with a trench.

As a further implementation mode, the emptying pipeline is communicated with the collecting pipeline through an arc-shaped two-way connector.

As a further implementation, the shut-off valve is a butterfly valve or a ball valve.

In a second aspect, another embodiment of the present invention provides a sewage treatment line, including the check system of the centrifugal pump.

As a further implementation mode, the device comprises a sewage collecting tank and a sewage storage tank, wherein the sewage collecting tank is communicated with the sewage storage tank.

As a further implementation, the sewage collection tank is communicated with a trench.

As a further implementation mode, the sewage storage tank is communicated with the centrifugal pump through a water outlet pipe.

As a further implementation mode, the sewage treatment device also comprises a sewage treatment tank which is communicated with the collecting pipeline.

Above-mentioned the utility model has the advantages as follows:

1) the utility model discloses a plurality of sets of centrifugal pumps have been set up, every set of centrifugal pump is equipped with a check valve to set up an emptying pipe in the rear end of every check valve, utilize the emptying valve on the emptying pipe to realize the unloading of check valve, water hammer when effectively having avoided the centrifugal pump to shut down is to the damage of check valve, and utilize the trip valve on the emptying pipe to realize cutting off of pipeline and keep apart, maintenance does not influence the work of other centrifugal pump groups, has guaranteed the online change of check valve, has guaranteed work efficiency.

2) The utility model discloses well atmospheric duct transversely sets up, and atmospheric valve horizontal installation leads to the fact the harm by gravity to the valve body of atmospheric valve under the normal operating mode at the lateral part of atmospheric duct, has effectively been avoided.

3) The utility model discloses well sewage collecting pit communicates with trench and sewage tank respectively, can retrieve evacuation work exhaust sewage once more, has improved the utilization ratio of sewage, has avoided the waste to reduce the pollution simultaneously.

Drawings

The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to constitute a limitation on the invention.

Fig. 1 is a schematic diagram of the overall construction of a centrifugal pump check system according to one or more embodiments of the present invention;

in the figure: the mutual spacing or size is exaggerated to show the position of each part, and the schematic diagram is only used for illustration;

wherein, 1, a centrifugal pump; 2. an outlet conduit; 3. a check valve; 4. an emptying pipeline; 5. an atmospheric valve; 6. a shut-off valve; 7. a collection pipe; 8. a water discharge pipeline; 9. and (4) digging a trench.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

As introduced in the background art, the conventional check valve cannot ensure the complete protection of hydraulic impact on the centrifugal pump, when the check valve is improperly arranged or the hydraulic impact is greater than the bearing pressure of the check valve, the check valve fails, the blades of the centrifugal pump are damaged, and in case of serious safety accidents, liquid in a pipeline flows back to the interior of a workshop; and the check valve can't guarantee anterior segment pipeline pressure release when changing, and the unloading can't be done to liquid in the check valve, and the problem that the check valve can't be changed on line is for solving above-mentioned problem, the utility model provides a centrifugal pump non return system and sewage treatment line.

Example 1

The utility model discloses an in the typical embodiment, as shown in fig. 1, a centrifugal pump non return system is proposed, include, at least two sets of centrifugal pumps 1, for the convenience of explanation, this embodiment uses two sets of centrifugal pumps 1 as the example to describe, and the top of every centrifugal pump 1 of group all is equipped with an outlet pipe 2 for the transport of liquid.

Wherein, outlet pipe 2 is vertical to be placed, only allows the liquid of 1 pump port department of centrifugal pump to flow from bottom to top, all is equipped with a check valve 3 on every outlet pipe 2, and check valve 3's main function prevents the liquid backward flow, avoids the damage of 1 interior blade of centrifugal pump.

The rear end intercommunication of check valve 3 has a horizontal blow-down pipe 4 that sets up, and blow-down pipe 4 communicates with check valve 3 through curved two-way connection, and the work of unloading of mainly used check valve 3 can prevent effectively that liquid from flowing back when the pump body parks, avoids the water hammer influence.

Specifically, a vent valve 5 is installed on the side of each vent pipe 4, and the main function of the vent valve 5 is to vent the liquid in the vent pipe 4.

Each emptying valve 5 is externally communicated with a drainage pipeline 8, the drainage pipelines 8 on different emptying valves 5 are gathered and communicated with an external trench 9, and when emptying is carried out, liquid in different emptying pipelines 4 is gathered and discharged into the trench 9.

Wherein, atmospheric valve 5 horizontal installation avoids under the normal operating mode fluid to cause the harm by gravity to atmospheric valve 5's valve body.

The end of each emptying pipeline 4 is provided with a stop valve 6, the stop valve 6 can adopt butterfly valves or ball valves and other different models, specific types are selected according to actual design requirements, and excessive limitation is not performed.

The main effect of the cut-off valve 6 is to cut off different emptying pipelines 4, so that the check valves 3 on different pipelines are conveniently isolated, and the isolated check valves 3 can be replaced without affecting the work of other centrifugal pumps 1.

The tail ends of the different emptying pipelines 4 are communicated through a collecting pipeline 7 so as to realize the collection of the waste water.

The specific working principle is as follows:

in normal working conditions, the emptying valve 5 and the cut-off valve 6 do not work;

when the centrifugal pump 1 is stopped or the check valve 3 needs to be replaced on line, the communication between the emptying pipeline 4 and the collecting pipeline 7 is cut off by using the cut-off valve 6;

then, discharging the liquid in the emptying pipeline 4 to empty under the action of the emptying valve 5, and discharging the liquid into the trench 9 by utilizing a drainage pipeline 8;

after emptying, overhauling the centrifugal pump 1 or replacing the check valve 3;

after the maintenance or replacement is finished, the emptying valve 5 and the cut-off valve 6 are closed, so that the emptying pipeline 4 after the maintenance is finished is communicated with the collecting pipeline 7 again.

Under the effect of air release pipeline 4 and air release valve 5, effectively avoided the liquid reflux to check valve 3's damage problem, cooperation trip valve 6 has realized the online isolation of pipeline simultaneously, has guaranteed check valve 3's online change or maintenance, has avoided the influence of maintenance work to 1 group's work of other centrifugal pumps, has improved work efficiency.

Example 2

In another exemplary embodiment of the present invention, a sewage treatment line is provided, including the check system of the centrifugal pump of embodiment 1.

The device is also provided with a sewage collecting tank, a sewage storage tank and a sewage treatment tank, wherein the sewage collecting tank is communicated with the trench 9 and is used for collecting the wastewater discharged from the trench 9;

the sewage treatment tank is communicated with the collecting pipeline 7 and is used for treating the conveyed sewage;

the sewage reservoir mainly used stores sewage, and the sewage reservoir passes through outlet pipe and centrifugal pump 1 intercommunication, and the sewage reservoir still communicates with the sewage collecting tank for further collect and remit centrifugal pump non return system with the exhaust waste water of emptying in the pipeline 4 that empties.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a centrifugal pump non return system, its characterized in that, includes a plurality of centrifugal pumps of group, and the pump mouth of every centrifugal pump of group all communicates the outlet conduit of a vertical setting, is equipped with a check valve on the outlet conduit, the lateral part of drain is equipped with an atmospheric valve, and the end of drain is equipped with a trip valve, and the drain on every centrifugal pump of group all with collect the pipeline intercommunication.

2. A centrifugal pump check system as recited in claim 1, wherein said blow valve is mounted horizontally.

3. A centrifugal pump check system as in claim 1 wherein said dump valve communicates externally with a drain line, said drain line communicating with a trench.

4. A centrifugal pump check system as in claim 1 wherein the blow down conduit communicates with the collection conduit through an arcuate two-way fitting.

5. A centrifugal pump check system according to claim 1, wherein the shut-off valve is a butterfly valve or a ball valve.

6. A sewage treatment line comprising a centrifugal pump back stop system according to any one of claims 1 to 5.

7. The sewage treatment line according to claim 6, comprising a sewage collection tank and a sewage storage tank, wherein the sewage collection tank is communicated with the sewage storage tank.

8. The wastewater treatment line according to claim 7, wherein the wastewater collection tank is in communication with a trench.

9. The wastewater treatment line of claim 7, wherein the wastewater storage tank is in communication with the centrifugal pump via an outlet pipe.

10. The wastewater treatment line of claim 6, further comprising a wastewater treatment basin in communication with the collection conduit.

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