CN204851678U - Backward flow pressure reducer of multistage high -lift centrifugal pump of modified - Google Patents

Backward flow pressure reducer of multistage high -lift centrifugal pump of modified Download PDF

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Publication number
CN204851678U
CN204851678U CN201520511321.8U CN201520511321U CN204851678U CN 204851678 U CN204851678 U CN 204851678U CN 201520511321 U CN201520511321 U CN 201520511321U CN 204851678 U CN204851678 U CN 204851678U
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CN
China
Prior art keywords
pump
multistage
pressure
sleeve pipe
housing
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Active
Application number
CN201520511321.8U
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Chinese (zh)
Inventor
王道畅
刘华中
宫苏莲
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
YANTAI HUMON PUMP Co Ltd
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YANTAI HUMON PUMP Co Ltd
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Priority to CN201520511321.8U priority Critical patent/CN204851678U/en
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Abstract

The utility model provides a backward flow pressure reducer of multistage high -lift centrifugal pump of modified, including the pump body, pump body top do not is equipped with pumps mouth and pump intake, pumps and is equipped with high pressure ball valve and pressure reducer subassembly through the pipeline between mouth and the pump intake, the pressure reducer subassembly includes the casing and installs the apron on the casing, is equipped with the sleeve pipe in the casing, is equipped with the spring on the sleeve pipe, is equipped with the clamping ring between sleeve pipe one end and the apron, is equipped with the thrust nut on the clamping ring. The utility model discloses utilize spring damping to absorb the pressure principle to the mode that enlarges gradually through the pipeline diameter can the part reduce highly pressurised liquid's pressure energy and speed, and liquid stream after the step -down reduces the disturbance meeting of pump intake liquid stream greatly, has guaranteed that the pump can run well when multistage high -lift centrifugal pump actual output flow is lighter than the minimum continuous flow of pump.

Description

A kind of backflow decompressor of multistage high-lift single centrifugal pump of improvement
Technical field
The utility model belongs to mechanical field, relates in particular to a kind of backflow decompressor of multistage high-lift single centrifugal pump of improvement.
Background technique
When the operating flux of multistage high-lift single centrifugal pump reality is less than the minimum continuous flow of this pump, pump group produces high vibration, noise, and pipe-line system can produce resonance phenomenon, has a strong impact on the safe operation of pump and pipe-line system.In order to enable pump also can normally run when being less than minimum discharge, needing to add bypass shunt in its outlet port, making pump discharge flow sum (the actual use traffic of pipeline, bypass flow) be greater than its minimum continuous flow value.But, when pump discharge pressure is greater than 2.1MPa, when the highly pressurised liquid of backflow enters Pump Suction Nozzle, serious eddy flow disturbance can be produced to the liquid of Pump Suction Nozzle, cause Pump Suction Nozzle liquid stream can not continuous-flow, produce Intermittent blockage, whole pump there will be the phenomenons such as vibration, noise, outlet pressure instability, affects the normal operation of pump.
Model utility content
The utility model provides a kind of backflow pressure reducer device of multistage high-lift single centrifugal pump of improvement, to solve in background technique when multistage high-lift single centrifugal pump actual motion flow is less than pump minimum continuous flow, pump group can produce high vibration, noise, pipe-line system produces resonance phenomenon, has a strong impact on the shortcoming of pump and pipe-line system safe operation.
The technical solution of the utility model is achieved in that a kind of backflow decompressor of multistage high-lift single centrifugal pump of improvement, comprise the pump housing, pump housing top is respectively equipped with pump discharge and Pump Suction Nozzle, is provided with high-pressure ball valve and reducer assemblage between pump discharge and Pump Suction Nozzle by pipeline;
Preferably, described reducer assemblage comprises housing and is arranged on the cover plate on housing, and be provided with sleeve pipe in housing, sleeve pipe is provided with spring, and be provided with pressure ring between sleeve pipe one end and cover plate, pressure ring is provided with Thrust nut;
Preferably, described high-pressure ball valve is Three-piece high-pressure ball valve;
Preferably, sealing gasket is provided with between described cover plate and housing.
The beneficial effects of the utility model are:
1, whether by-pass reducing device assembly starts to utilize Three-piece high-pressure ball valve to determine, when pump normally runs, Three-piece high-pressure ball valve is closed, when needs pump discharge flow is less than its minimum continuous flow, open Three-piece high-pressure ball valve, start bypassing reflux stream device, the aperture of Three-piece high-pressure ball valve is arbitrary Variable quantity.
2, the reducer assemblage that refluxes utilizes spring damping absorption pressure principle, and by mode that pipeline diameter expands gradually, the pressure energy of highly pressurised liquid and speed can partly be reduced, the disturbance of liquid stream after step-down to Pump Suction Nozzle liquid stream can reduce greatly, ensure that pump can run well when the actual output flow of multistage high-lift single centrifugal pump is less than pump minimum continuous flow.
Accompanying drawing explanation
Fig. 1 is the structural representation before the utility model improves;
Fig. 2 is the structural representation after the utility model improves.
Part illustrates:
1, the pump housing, 2, high-pressure ball valve, 3, reducer assemblage, 3.1, housing, 3.2 sealing gaskets, 3.3 Thrust nuts, 3.4, pressure ring, 3.5, socket head screw, 3.7, sleeve pipe, 3.8, spring, 4, pump discharge, 5, Pump Suction Nozzle, 6, pipeline.
Embodiment
In order to Comprehension and Implementation better, below in conjunction with accompanying drawing, the utility model is further described: a kind of backflow decompressor of multistage high-lift single centrifugal pump of improvement, comprise the pump housing 1, the pump housing 1 top is respectively equipped with pump discharge 4 and Pump Suction Nozzle 5, high-pressure ball valve 2 and reducer assemblage 3 is provided with by pipeline 6 between pump discharge 4 and Pump Suction Nozzle 5, high-pressure ball valve 2 is Three-piece high-pressure ball valve, the cover plate 3.1 that reducer assemblage 3 comprises housing 3.6 and is arranged on housing 3.6, cover plate 3.1 and housing 3.6 utilize socket head screw 3.5 to be linked together, sealing gasket 3.2 is provided with between cover plate 3.1 and housing 3.6, sleeve pipe 3.7 is provided with in housing 3.6, sleeve pipe 3.7 is provided with spring 3.8, pressure ring 3.4 is provided with between sleeve pipe 3.7 one end and cover plate 3.1, pressure ring 3.4 is provided with Thrust nut 3.3, the scyewed joint of pressure ring 3.4 and Thrust nut 3.3 is utilized to be pressed in housing 3.6 by the spring 3.8 of sleeve pipe 3.7, utilize spring 3.8 braking absorption pressure principle, and by mode that pipeline diameter expands gradually, the pressure energy of highly pressurised liquid and speed can partly be reduced, the disturbance of liquid stream after step-down to Pump Suction Nozzle liquid stream can reduce greatly, ensure that when the actual output flow of multistage high-lift single centrifugal pump is less than pump minimum continuous flow, pump can run well.

Claims (4)

1. the backflow decompressor of the multistage high-lift single centrifugal pump improved, comprise the pump housing (1), the pump housing (1) top is respectively equipped with pump discharge (4) and Pump Suction Nozzle (5), it is characterized in that being provided with high-pressure ball valve (2) and reducer assemblage (3) by pipeline (6) between pump discharge (4) and Pump Suction Nozzle (5).
2. the backflow decompressor of the multistage high-lift single centrifugal pump of a kind of improvement as claimed in claim 1, it is characterized in that described reducer assemblage (3) comprises housing (3.6) and is arranged on the cover plate (3.1) on housing (3.6), sleeve pipe (3.7) is provided with in housing (3.6), sleeve pipe (3.7) is provided with spring (3.8), be provided with pressure ring (3.4) between sleeve pipe (3.7) one end and cover plate (3.1), pressure ring (3.4) is provided with Thrust nut (3.3).
3. the backflow decompressor of the multistage high-lift single centrifugal pump of a kind of improvement as claimed in claim 1, is characterized in that described high-pressure ball valve (2) is Three-piece high-pressure ball valve.
4. the backflow decompressor of the multistage high-lift single centrifugal pump of a kind of improvement as claimed in claim 2, is characterized in that being provided with sealing gasket (3.2) between described cover plate (3.1) and housing (3.6).
CN201520511321.8U 2015-07-15 2015-07-15 Backward flow pressure reducer of multistage high -lift centrifugal pump of modified Active CN204851678U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520511321.8U CN204851678U (en) 2015-07-15 2015-07-15 Backward flow pressure reducer of multistage high -lift centrifugal pump of modified

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520511321.8U CN204851678U (en) 2015-07-15 2015-07-15 Backward flow pressure reducer of multistage high -lift centrifugal pump of modified

Publications (1)

Publication Number Publication Date
CN204851678U true CN204851678U (en) 2015-12-09

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Family Applications (1)

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CN201520511321.8U Active CN204851678U (en) 2015-07-15 2015-07-15 Backward flow pressure reducer of multistage high -lift centrifugal pump of modified

Country Status (1)

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CN (1) CN204851678U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104929955A (en) * 2015-07-15 2015-09-23 烟台恒邦泵业有限公司 Improved backflow pressure reducer for multistage high-lift centrifugal pump

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104929955A (en) * 2015-07-15 2015-09-23 烟台恒邦泵业有限公司 Improved backflow pressure reducer for multistage high-lift centrifugal pump

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