CN203384058U

CN203384058U - Roots self-priming pump

Info

Publication number: CN203384058U
Application number: CN201320397844.5U
Authority: CN
Inventors: 崔正军; 王玉霞; 苏循德; 马延艳; 李学龙
Original assignee: LIAONING GERUITE PUMP CO Ltd
Current assignee: LIAONING GERUITE PUMP CO Ltd
Priority date: 2013-07-05
Filing date: 2013-07-05
Publication date: 2014-01-08
Anticipated expiration: 2023-07-05

Abstract

The utility model provides a novel roots self-priming pump which comprises a centrifugal pump, a roots pump and an electric control start-stop component. The novel roots self-priming pump is technically characterized in that the roots pump serving as an evacuating device is connected onto an outlet evacuating component of the centrifugal pump, and the roots pump forces media to enter an inlet pipeline and a cavity of the centrifugal pump by pumping out air in the inlet pipeline of the centrifugal pump and in the pump before the centrifugal pump runs, so that the centrifugal pump is automatically primed. The novel roots self-priming pump has the advantages that the complete pump is arranged above the ground and conveniently maintained, a pump shaft or a pump body is not inserted into the media and not easily damaged, the novel roots self-priming pump can realize self-priming without filling and drawing water, the pump is started only after filled with the media so that dry grinding is avoided, pumping rate is high, the pump can be primed within a quite short time, the novel roots self-priming pump is particularly applicable to large-caliber working conditions with strict pump starting time, is electrically controlled, can automatically start and stop and is short in operation time and small in occupied area, and the labor intensity of operators is reduced.

Description

Roots's self-priming pump

Technical field

The utility model relates to a kind of novel Roots's self-priming pump.

Background technique

Fire extinguishing pump performance quality is related to the safety of people's lives and properties, and toggle speed is fast, and flow greatly more and more becomes the type selecting trend of fire water pump.Originally fire water pump adopts manual pump priming efficiency low, by self-priming pump, is replaced gradually.Under China's liquid, put at present self-priming pump and mainly contain following severally, what have exists some problems: the one, and interior return flow type self-priming pump, in the pump housing, the liquid backflow hole is easily stopped up, and causes self-priming to lose efficacy, and efficiency is low, and self-priming time is long.The 2nd, without the sealed type self-priming pump, efficiency is low, and power consumption is large, and during stoppage in transit, the interior liquid of pump easily overflows, and the self-priming performance reliability is low; The 3rd, Strong self priming pump, the vacuum system rate of fault is high, and bearing and driving gear are all fragile, the manual gear clutch, operation inconvenience, complex structure, inconvenient maintenance, the machine envelope needs outer the flushing, and the end face inefficacy of easily dry grinding, consume energy high, and nonstandard pump, safeguard that interchangeability is poor; The 4th, the diaphragm type self-priming pump, this pump is safe but the speed of exhaust is less, can't meet the conveying of the large speed of exhaust operating mode of large flow.The 5th, the turbine-type self-priming pump, with the turbine blower fan, vacuumize, gas is discharged by the impeller of High Rotation Speed, the speed of exhaust is several higher than front, but realize that Application of Large-diameter Pump self-starting in a minute just must adopt and hang the water device, need every day the frequent starting turbine installation to realize, and every day repeatedly the frequent starting turbine installation easily cause the damage of turbine equipment, waste energy.

Summary of the invention

The purpose of this utility model is the deficiency existed in above-mentioned technology, provides a kind of novel roots's self-priming pump,take full advantage of the Roots pump speed of exhaust high, characteristics stable and reliable for performance.

The purpose of this utility model is achieved in that and comprises centrifugal pump, Roots pump and automatically controlled start and stop assembly.It is characterized in that, Roots pump is connected to centrifugal delivery side of pump as vacuum pumping device and vacuumizes on assembly, and before the centrifugal pump operation, Roots pump forces medium to enter the mode of centrifugal pump entrance pipe and centrifugal pump chamber to the automatic pump priming of centrifugal pump under the atmospheric pressure effect by extracting air in centrifugal pump suction line and pump out.Electronic start and stop assembly is by the stifled valve of liquid level, liquid level is blocked up valve ball float, liquid-level floater switch and appliance controling element and is formed, Roots pump starts, in centrifugal pump, medium rises, after arriving liquid-level floater liquid-level switch place, liquid-level switch is connected, spread out of electrical signal to appliance controling element, the Roots pump motor is out of service, and centrifugal pump stops pump priming entry into service.Roots pump and electronic start and stop assembly straddle on the centrifugal pump suction line by the suction port support, reduced the Applicable scope that floor space has increased this pump.

The beneficial effects of the utility model: 1, the complete machine pump is on ground, easy to maintenance; 2, pump shaft or the pump housing do not insert in medium, not fragile; 3, do not need water, the energy self-priming; 4, medium is filled with pump and is just opened pump, avoids dry grinding; 5, the speed of exhaust is large, can within the extremely short time, realize pump priming, is particularly useful for heavy caliber, opens the strict operating mode of pump time requirement; 6, electronic control, but automatic start-stop, the operating time is short, has reduced operator's labor intensity; 7, floor space is little.

the accompanying drawing explanation:

Fig. 1 is the utility model structural drawing

Fig. 2 is the left side view of Fig. 1

embodiment:

Below in conjunction with accompanying drawing, the present embodiment is described further:

From Fig. 1-Fig. 2; guard shield 1 is enclosed within the Roots pump outside; each parts are played to barrier protection; for saving space; Roots pump is transformed; be placed in the device top by former with the Roots pump motor 2 of the parallel placement of Roots pump; be fixed on Roots pump baffler 4; Roots pump 5 is placed in bottommost; the Roots pump suction port sweeps away with the electronic start and stop assembly of self-priming machine and is connected; electronic start and stop assembly is by the stifled valve 7 of liquid level, and liquid level is blocked up valve ball float 8, liquid-level floater switch 9 forms, and by medium height of liquid level in centrifugal pump, controls Roots pump and centrifugal pump start and stop.Said elements straddles on centrifugal pump suction line 11 by suction port support 10, has reduced floor space.After Roots pump motor 2 starts, by belt 3, drive Roots pump 5 runnings, gas in centrifugal pump suction line and centrifugal pump is vacuumized to assembly 14, air permeable plate 6 by outlet and constantly suck from the Roots pump entrance, discharge from Roots pump outlet 16.Subsequently, under liquid, medium enters centrifugal pump suction line 11 and centrifugal pump 12 under the pressure of atmosphere.When the medium sucted reaches the position that liquid level is blocked up valve 7; the stifled valve ball float 8 of the liquid level of floating is blocked air permeable plate 6; medium can not enter Roots pump; when the liquid-level floater switch 9 below medium touches Roots pump, liquid-level floater switch 9 is controlled Roots pump motor 2 and is shut down simultaneously, centrifugal pump motor 15 work; now; open manually outlet of centrifugal pump valve 13, centrifugal pump starts medium under normal conveying liquid, has realized the automatic pump priming of Roots's self-priming pump and operation.

Guard shield 1 is enclosed within Roots pump 5 and motor 2 thereof, Roots pump baffler 4 outsides, Roots pump motor 2 is placed in the device top, be fixed on Roots pump baffler 4, Roots pump is placed in baffler 4 bottoms, Roots pump motor 2 drives Roots pump 5 runnings by belt 3, the Roots pump suction port sweeps away that (liquid level is blocked up valve 7 with the electronic start and stop assembly of self-priming machine, liquid level is blocked up valve ball float 8, liquid-level floater switch 9) be connected, air permeable plate 6 is positioned at above the stifled valve ball float of liquid level, and said elements is arranged on centrifugal pump suction line 11 by suction port support 10.Roots pump 5 vacuumizes assembly 14 with electronic start and stop assembly by outlet and is connected with outlet of centrifugal pump and by Roots pump relief opening 16, the gas of extraction is discharged to atmosphere.Outlet of centrifugal pump valve 13 is arranged on centrifugal pump 12 outlet lines.It is large that said structure only limits to the Pump Suction Nozzle footpath, and in the very large situation of Roots pump size, less when the Pump Suction Nozzle footpath, Roots pump can be placed on Roots pump and motor side in a hour baffler position.

Claims

1. novel Roots's self-priming pump, comprise centrifugal pump, Roots pump and automatically controlled start and stop assembly, it is characterized in that, Roots pump is connected to centrifugal delivery side of pump as vacuum pumping device and vacuumizes on assembly, and before the centrifugal pump operation, Roots pump forces medium to enter the mode of centrifugal pump entrance pipe and centrifugal pump chamber to the automatic pump priming of centrifugal pump under the atmospheric pressure effect by extracting air in centrifugal pump suction line and pump out.