CN201232643Y

CN201232643Y - Medium-coupling vertical self-priming centrifugal pump

Info

Publication number: CN201232643Y
Application number: CNU200820036238XU
Authority: CN
Inventors: 陈寿东; 李洪; 凌贤金
Original assignee: BAOYING COUNTY HANGHAI MACHINERY FACTORY
Current assignee: BAOYING COUNTY HANGHAI MACHINERY FACTORY
Priority date: 2008-05-23
Filing date: 2008-05-23
Publication date: 2009-05-06
Anticipated expiration: 2018-05-23

Abstract

The utility model discloses a middle-combined type vertical self-priming centrifugal pump. The utility model relates to a pump which includes a pump body provided with a pump cavity, and an impeller which is arranged in the pump body and driven by a motor through a pump shaft; an intake line and a discharge line communicated with the pump body are arranged in the pump body; an entrance bucket corresponding to the impeller is arranged in the pump body; a water inlet one-way rubber valve is arranged at the location of the intake line. In the utility model, the water inlet rubber valve is arranged at the location of the intake line, thus effectively preventing the refluence problem of the water in the pump body and ensuring the working performance of the self-priming pump.

Description

Middle connecting type vertical self-priming centrifugal pump

Technical field

The utility model relates to a kind of pump, relates in particular to a kind of middle connecting type vertical self-priming centrifugal pump with suction capacity.

Background technique

Before startup, must in the pump housing, pour under the situation of enough water (or suction line is full of by water) in order to solve Ordinary Centrifugal Pumps at every turn, can make the pump proper functioning, very inconvenient.And self-priming centrifugal pump when needing only initial start-up, pours into enough water in the pump housing, and the effect by pump itself can run well within a short period of time, starts later on, guarantees that because of leaving water in the pump pump can start once more.Common self-priming centrifugal pump is divided into three kinds at present, be respectively the gas-liquid mixed formula, water ring is wheeled, jet-type, the working procedure of gas-liquid mixed formula self-priming pump: because the special construction of the self-priming pump pump housing, after the water pump stall, there is a certain amount of water in the pump housing, pump starts the back once more because the impeller turning effort, the empty G﹠W of suction line fully mixes, and be discharged to air-water separation chamber, and the gas on air-water separation chamber top overflows, and the water of bottom returns impeller, again the surplus air with suction line mixes, up to the gas in pump and the suction pipe is all discharged, finish self-priming, and normally draw water.The wheeled self-priming pump of water ring is that water ring wheel and water pump vane are combined in the housing, by the water ring wheel gas is discharged, and realizes self-priming.After the pump proper functioning, can block the passage of water ring wheel and water pump vane by valve, and bleed off the liquid in the water ring wheel.The jet-type self-priming pump is combined by centrifugal pump and Jet injector (or sparger), relies on injection apparatus, causes vacuum to realize suction at the nozzle place.Wherein the wheeled and jet-type of water ring exists self-priming weak effect, defective such as bulky, and the combination property of gas-liquid mixed formula self-priming centrifugal pump is better, so that uses is comparatively extensive, but there be the problem of the interior water of the pump housing, thereby influence the service behaviour of pump by the intake line backflow.

The model utility content

The utility model is at above-mentioned defective, and purpose is to provide a kind of middle formula self-priming centrifugal pump that can prevent water reflux problem in the pump housing.

The technical solution of the utility model is: the utility model comprises the pump housing that has pump chamber and is positioned at the impeller that the pump housing is driven by pump shaft by motor, be provided with the intake line and the discharge conduit that are communicated with the pump housing in the pump housing, be provided with in the pump housing and the corresponding stator that is provided with of impeller, the intake line place is provided with the into unidirectional glue valve of water.

Maintain the radial clearance between the 2-3mm between stator and the impeller, stator top is provided with return port.

Be provided with seal ring between the impeller inlet place and the pump housing, the gap of sealing is between the 0.3-0.5mm.

The utility model is provided with into water glue valve at the intake line place, effectively prevented the reflux problem of water in the pump housing, has guaranteed the service behaviour of self-priming pump.

Description of drawings

Fig. 1 is a structural representation of the present utility model

1 is motor, the 2nd among the figure, motor coupler, the 3rd, and intermediate shaft coupling, 4 pump coupling, 5-1 and 5-2 are bearings, the 6th, motor frame, the 7th, seal, the 8th, discharge conduit, the 9th, impeller, the 10th, return port, the 11st, stator, the 12nd, the pump housing, the 13rd, bearing cap, the 14th, liquid filling hole, the 15th, pump shaft, the 16th advances water glue valve, the 17, the 18th, seal ring, the 19th, intake line, the 20th, suction chamber.

Embodiment

The utility model comprises the pump housing that has pump chamber and is positioned at the impeller 9 that the pump housing 12 is driven by pump shaft 14 by motor 1, be provided with the intake line 18 and the discharge conduit 8 that are communicated with the pump housing 12 in the pump housing 12, be provided with in the pump housing 12 and the impeller 9 corresponding stators 11 that are provided with, intake line 19 places are provided with into water glue valve 16.Maintain the radial clearance between the 2-3mm between stator 11 and the impeller 9, stator 11 inwalls are formed with towards the runner of impeller 9 outer circumferential sides, stator 11 tops are provided with return port 10, be provided with

seal ring

17 and 18 between impeller 9 inlets and the pump housing 12, the gap of sealing is between the 0.3-0.5mm, and motor 1 is arranged on the motor frame 6.

Pump shaft 14 of the present utility model is realized being connected by pump coupling 4, intermediate shaft coupling 3, motor coupler 2 and motor 1, realizes supporting by bearing 5-1 and 5-2, establishes bearing cap 13 on the bearing.

Working procedure of the present utility model is: when pump starts first, the water of capacity will be added by the liquid filling hole on the seal 7 14 in the pump housing 12, must flood impeller 9, starting electrical machinery 1, motor 1 rotation drives pump shaft 15, make impeller 9 rotations, with the water in suction chamber 20 and the impeller 9, be transported to stator 11 inlets through impeller 9 centrifugation effect, be drained into pump chamber through stator 11, after the water of suction chamber 20 is by impeller 9 emptyings, gas in suction chamber 19 and the inlet pipeline enters impeller 9, forms gas in stator 11 outlet ports, the liquid phase mixture, different and carry out gas by the proportion of water and gas, liquid separates, gas is discharged from through outlet pipe, and the return port 10 of a part of water on seal 7 got back to impeller 9.Along with carrying out repeatedly of this process, the air in the inlet pipeline is constantly by emptying, and water charges into suction line gradually, and this process is about about 2min, and pump begins normal operation.When pump quit work, the pump housing 12 internal memories left the water that enough allows pump normally move once more, settled the unidirectional glue valve 16 of water inlet at the suction port place, and the water in the pump housing 12 are unlikely by intake line 19 backflows.When pump is activated once more, because the water of retention is arranged in the pump, need not to add water by liquid filling hole 14, just can make the pump proper functioning.

Working principle of the present utility model is: so self-priming centrifugal pump can be seen water off is because action of centrifugal force.Water pump is before work, the pump housing 12 and suction chamber be must jar full water capable to become vacuum state, when impeller 9 quick rotation, blade impels the very fast rotation of water, the water that is rotating flies to enter stator 11 from impeller 9 under action of centrifugal force, reason gas-liquid separation owing to proportion, gas is discharged by discharge conduit 8, and a part of water is got back to impeller 9 by return port 10, after the water in the pump is dished out, the core of impeller 9 forms vacuum area, the water at water source is opened the into unidirectional glue valve 16 of water under the effect of atmospheric pressure, gas enters in the pump housing 20, repeats above-mentioned circulation again, gradually the air in the pump is drained, realize continuous pumpage, when pump quits work, the barometric pressure balance that pump is inside and outside, the unidirectional glue valve 16 of intaking cuts out, and has prevented the problem that water refluxes.

The utility model is in order to strengthen the service behaviour of pump, adopt stator 11 structures, after water comes out from impeller 9, has certain pressure energy and kinetic energy, behind stator 11, speed reduces, and kinetic energy changes into pressure energy, stator 11 also can be eliminated liquid from rotatablely moving that impeller comes out, and avoids the energy loss of bringing thus.

Claims

1, middle connecting type vertical self-priming centrifugal pump, comprise the pump housing that has pump chamber and be positioned at the impeller that the pump housing is driven by pump shaft by motor, be provided with the intake line and the discharge conduit that are communicated with the pump housing in the pump housing, be provided with in the pump housing and the corresponding stator that is provided with of impeller, it is characterized in that the intake line place is provided with the into unidirectional glue valve of water.

2, middle connecting type vertical self-priming centrifugal pump according to claim 1 is characterized in that maintain the radial clearance between the 2-3mm between stator and the impeller, stator top is provided with return port.

3, middle connecting type vertical self-priming centrifugal pump according to claim 1 is characterized in that be provided with seal ring between the impeller inlet place and the pump housing, the gap of sealing is between the 0.3-0.5mm.