CN100534371C

CN100534371C - Liquid aspirator

Info

Publication number: CN100534371C
Application number: CNB2005800111963A
Authority: CN
Inventors: D·霍夫迈尔; R·韦塞尔迈尔; U·瓦格纳
Original assignee: Oase Pumpen Wuebker Soehne GmbH and Co Maschinenfabrik
Current assignee: Oase Pumpen Wuebker Soehne GmbH and Co Maschinenfabrik
Priority date: 2004-04-14
Filing date: 2005-04-14
Publication date: 2009-09-02
Anticipated expiration: 2025-04-14
Also published as: CN1942129A; DE102004018504A1

Abstract

The present invention relates to a liquid aspirator, in particular for solid-containing liquids such as sludge, has a container (13) into which liquid can be aspirated by means of an aspiration motor (3, 4) through an aspiration connection (15) and out of which the liquid can flow through an outlet (7). According to the present invention, the liquid aspirator is configured to allow the container (13) to have at least two separate chambers (1, 2) and a control unit that alternatively fills one chamber (1, 2) with liquid while the other chamber (2, 1) is emptied. The chambers (1, 2) can be closed from the aspiration side of the aspiration engine (3, 4) by main valves which are preferably mechanically interconnected.

Description

Liquid aspirator

Technical field

The present invention relates to a kind ofly be used to aspirate or carry liquid especially to contain the liquid aspirator of the liquid of solid such as mud and so on.

Background technology

Known this by DE 102 40 804 A1 by claim 1 liquid aspirator as described in the preamble.It has a container, causes negative pressure by the motor of bleeding in container.By negative pressure with liquid or mud in suction joint suction container, and, be full of and motor cuts off after outlet and the emptying part that mostly is flexible pipe greatly can be discharged from the container liquid or mud and direct into the place of requirement again in form at container.

This type of ooze sucker reliable operation because by container motor is separated with liquid that will move or mud, can avoid motor to be damaged by accompanying solid.But, behind each stowing operation of container, must have suction to be interrupted, emptying receptacles again between this suction rest periods.Therefore the suction of liquid or mud is more time-consuming.

Summary of the invention

The objective of the invention is to create a kind of liquid aspirator that is improved in this respect.

For this reason, the invention provides a kind of liquid aspirator, comprise a container, liquid by suction motor by the suction joint can the described container of suction in, and liquid can be discharged by an outlet from described container, it is characterized by: described container has at least two accepting chambers that separate and a control device, described accepting chamber can be sealed with respect to the suction side of suction motor by main valve respectively, alternately an accepting chamber is carried out by described control device liquid-filled, another accepting chamber emptying during this period.

By the present invention, be designed at least two accepting chambers that separate and a control device is set by container liquid aspirator, and to implement by control device alternately be accepting chamber filling and evacuation of liquid, can carry out the aspiration procedure of liquid or mud continuously, because all the time can be with in one of liquid suction accepting chamber, just in time emptying and provide the position for refilling thus of another accepting chamber during this period.

Preferably, by liquid aspirator of the present invention with two accepting chamber work.Can be each accepting chamber and set an independent motor, control device can be designed to simply in this case, makes it alternately connect and cut off motor.Therefore, liquid flows out under its deadweight effect from just in time cut that chamber of its motor, and liquid is by in another accepting chamber of motor suction of another connection during this period.

By a kind of particularly preferred form of implementation, a suction motor only is set and is that the suction side that makes motor alternately connects with different accepting chamber circuit design, thus also alternately filling and emptying accepting chamber.Therefore, the suction motor continuously-running and thereby efficient higher.Liquid is drawn in that accepting chamber that suction motor suction side just in time is attached thereto, and another accepting chamber is not in negative pressure state during this period, so the liquid there can be discharged under its deadweight effect.In case the complete or basic emptying of this accepting chamber, then process is opposite, and that at first the chamber of emptying be connected with the suction chamber of suction motor so that correspondingly refill.

Suction motor can design arbitrarily, for example is designed to air exhauster or vavuum pump.

Control device can be designed as electronic-controlled installation, also can be designed as time-controlling arrangement.But it preferably is designed to machine control unit or switch, can realize lower maintenance requirement and reduce the sensitiveness of influence to external world and the mistake of possible for example aspirator valve is used because do like this.

Description of drawings

Provide other advantages of the present invention and details by what represent in the accompanying drawings by embodiments of the invention, these embodiment are described below, wherein:

Fig. 1 has the liquid aspirator profile of two motors;

Fig. 2 another kind has the form of implementation outside drawing of a motor;

Fig. 3 is along the profile of direction III-III by aspirator among Fig. 2;

Fig. 4 is along the profile of direction IV-IV by aspirator among Fig. 2;

Fig. 5 is along the profile of direction V-V by aspirator among Fig. 2;

Fig. 6 to 11 aspirator shown in Figure 3 is in different fillings and empty stage;

Figure 12 is along the sectional detail drawing of direction XII-XII among Fig. 5, but by another embodiment;

Figure 13 presses the sectional detail drawing of local XIII among Fig. 6, still by another embodiment;

Figure 14 aspirator shown in Figure 13 is in another filling/empty stage;

Figure 15 is by the another kind of form of implementation and the corresponding part sectioned view of Fig. 3 of the mud aspirator of Fig. 2 to 11; And

Figure 16 to 17 is by the another kind of separate unit motor form of implementation profile of liquid aspirator of the present invention.

The specific embodiment

Fig. 1 schematically illustrates liquid aspirator, and it has two accepting chambers that separate 1,2.For each accepting

chamber

1,2 sets oneself a suction motor 3,4.Can cause negative pressure in

chamber

1,2 by suction motor 3,4, liquid can be drawn in the accepting

chamber

1,2 via the suction joint in feeding accepting

chamber

1,2 upper zone that do not have to represent thus.If for example accepting chamber 1 then cuts off suction motor 3 with liquid-filled height to regulation.Under the deadweight effect of liquid, open a negative pressure valve 5 at downside sealing accepting chamber 1, liquid is not for example outlet hose outflow of the emptying part of expression in exporting 7 and figure that are attached thereto.Guarantee that by control

device accepting chamber

1,2 alternately carries out the filling and the emptying of liquid, thus pumping liquid and discharge continuously through exporting 7.In illustrated form of implementation, control is undertaken by

float

9,10, and float can remain in the guiding

device

11,12 respectively with vertically moving.Float 9,10 becomes valve by them simultaneously in the structural design of upside, and accepting

chamber

1,2 can close with respect to motor 3,4 suction side seal separately by them, and liquid can not be inhaled in the motor.For example reed switch or analog are replied by signal transducer in the position of float 9,10.If

float

9,10 arrives its upper terminal position, signal transducer then sends signal " chamber is full " to electronic-controlled installation, and electronic-controlled installation cuts off corresponding motor 3,4 and connects another motor 4,3.But motor 3,4 also can be handled by the switch of appropriate arrangement by the action mechanical ground of float 9,10.It also can be the electronic circuit of the pure time control of motor 3,4.

Expression is by the particularly preferred form of implementation of liquid aspirator of the present invention in Fig. 2 to 11.Outside drawing among Fig. 2 represents to have the shell of the container 13 and the liquid aspirator of lid 14.Suction joint 15 extends in the container 13.

Fig. 3 represents the central section by liquid aspirator.It has two accepting

chambers

1,2, can cause negative pressure by aspirating

hole

17,18 by separate unit suction motor 3 in accepting chamber.Suction motor 3 is suction air continuously, and aspirating

hole

17,18 alternately opens or closes by

main valve

19,20, so only cause negative pressure in an accepting

chamber

1,2 all the time.This alternately the opening and closing by coupling

main valve

19,20 of

main valve

19,20 guarantee, it preferably with low susceptibility be designed to mechanical.If liquid aspirator has two accepting

chambers

1,2 as represented form of implementation, but then

main valve

19,20 can by simple especially mode by self rigidity but the rocking bar 21 of gyration ground supporting connect.The

float

9,10 that remains in the guiding

device

11,12 of

main valve

19,20 imports with moving through high flexibility.If float 9 rises to its highest possible position by the liquid of suction as shown in the figure in chamber 1, then it presses main valve 19 and thereby main valve 20 is opened.Accepting chamber 1 no longer is connected with the suction side of suction motor 3 now, thereby no longer has negative pressure in accepting chamber 1.By accumulate in the accepting chamber 1, the no longer deadweight of the liquid by negative pressure compensating now, open negative pressure valve 5, and liquid can through export 7 and figure in not expression the emptying part that is attached thereto for example flexible pipe discharge.

By illustrated form of implementation, the

secondary valve

23,24 that the emptying of accepting

chamber

1,2 is also represented in Figure 4 and 5 by accepting

chamber

1,2 and the air-supply side of suction motor 3 or on the pressure side be connected and supported.

Secondary valve

23,24 is controlled to be always when

main valve

19,20 is closed, is opened for the

secondary valve

23,24 that accepting

chamber

1,2 is separately set.For example, in the position shown in Fig. 3 and 4, by suction motor 3 air-supplies and the secondary valve 23 through opening air-supply is invaded in the accepting chamber 1 when discharging the liquid that is in the there in accepting chamber 1 and form overvoltage, this overvoltage is quickened liquid and is flowed out from negative pressure valve 5.The preferably same mechanical couplings of

secondary valve

23,24, this coupling is preferably equally via rocking bar 25.

Fig. 5 expresses support for the principle of emptying, does not represent suction motor 3 in Fig. 5.The rocking bar 25 of the rocking bar 21 of

main valve

19,20 and

secondary valve

23,24 can be connected around this gyroaxis 26 rigidly and only jointly pivotally by a public gyroaxis 26, and thereby with simple mode mechanical couplings.Guarantee that thus the main valve 19 of accepting chamber 1 and the main valve 20 and the secondary valve 24 of secondary valve 23 or accepting chamber 2 alternately open and close respectively.Fig. 5 also represent

main valve

19,20 be connected one with slotted hole shape suction chamber 27 that suction motor 3 suction chamber are connected on, and

secondary valve

23,24 is in one in the round pressure chamber 28 of suction chamber 27, pressure chamber is connected with the exhaust side of suction motor 3.The exhaust of suction motor 3 needn't be derived through

secondary valve

23,24 and accepting

chamber

1,2 fully, but also can partially or completely directly be discharged in the surrounding environment of liquid aspirator on demand.

Press the particularly preferred embodiment of representing in detail among Figure 12, the air-supply side of suction motor 3,4 is connected with accepting

chamber

1,2 by

float

9,10 and guiding

device

11,12 thereof.When

float guiding device

11,12 for prevent

float

9,10 and

main valve

19,20 pollute with nets, grid, knitted fabric, nonwoven or similarly filtration members around the time, above-mentioned design is particularly advantageous.Described filtration members is usually passed in time can by foul particle, tiny algae or analog stops up and thereby reduce the efficient of liquid aspirator.By apply the air-supply of suction motor 3,4 from

float guiding device

11,12 inboards, when once aspirating side, every conversion on filtration members, causes a little pressure pulse, and it washes foul particle and other dirts for filtration members.For this reason, as shown in figure 12, with pressure chamber 28 by one with float 10 upsides and thereby with the inboard passages 42 that are connected of float guiding device 12 be connected secondary valve 24 blow that sides of sides back to suction motor 3,4 on.The opposite side of not representing among the figure that comprises secondary valve 23 and float 9 correspondingly designs.

By Figure 4 and 5 as can be seen, accepting

chamber

1,2 is configured to the mode of special saving position facies suite insert mutually prejudicially, and here, these two accepting

chambers

1,2 have and a kind ofly help the cylindrical basically shape of pressure-bearing and identical material feeding volume is arranged basically.

The working method of liquid aspirator is described by Fig. 6 to 11 below: Fig. 6 represents that the main valve 20 of accepting chamber 2 is opened.In accepting chamber 2, form negative pressure, therefore the liquid suction accepting chamber 2 that will symbolically represent by suction joint 15 and the check valve of opening 32 with blank arrow.Float 10 is along with the rising of the liquid level moved upward inside at its guiding device 12 in this case.Guiding device 12 is designed to run through in lower region as shown in the figure, so liquid can enter in the guiding device 12.But guiding device 12 is designed to seal in all sides in upper zone 12 ' interior.One seal 33 is arranged on float 10 excircle at an upper portion thereof.In case float 10 be provided with the upper zone of seal 33 insert the enclosed area, top 12 of guiding device 12 ' in, just the upper zone 12 ' interior swabbing action by suction motor 3 that also is closed at downside at this moment at guiding device 12 forms strong negative pressure, make float 10 upwards shake off liquid surface, impinge upon on the main valve 20 and it is upwards pressed hastily and close with the upside of its shape and main valve 20 basically identicals, thus, the main valve 19 of another accepting chamber 1 is opened by the coupling of rocking bar 21 by main valve 19,20.This status list constantly is shown among Fig. 7.In this form of implementation, guiding

device

11,12 have upside enclosed area 11 ', 12 ' and

float

9,10 particular design of seal 33 is arranged, feasiblely can provide enough mechanical pulsings, the main valve 19 that before sealed (or under the opposite situation with main valve 20) be overcome the negative pressure that suction motor 3 causes of passing through that exists open in suction chamber 27.

In accepting chamber 1, form negative pressure by Fig. 8, closed negative pressure valve 5 thus.By the check valve 31 that aspirates joint 15 and set for accepting chamber 1, the liquid of representing with blank arrow symbol is drawn in the accepting chamber 1 now.During this period, thus in the accepting chamber 2 since main valve 20 close and no longer have negative pressure.Therefore liquid is opened negative pressure valve 6 under the deadweight effect, and symbolically the liquid of representing with the blacking arrow flows out from exporting 7.

When how Fig. 9 and 10 has represented with emptying accepting chamber 2 with liquid-filled accepting chamber 1.This process is carried out once more on the contrary in Figure 11.Float 9 cuts out main valve 19 and opens main valve 20.Check valve 31 and negative pressure valve 6 are closed.Liquid flows out from accepting chamber 1 through exporting 7 from the negative pressure valve 5 opened.In accepting chamber 2 via suction joint 30 and the check valve 32 suction liquid opened.

Figure 13 and 14 is represented and the different embodiment of design that two

negative pressure valves

5,6 are arranged.A public negative pressure valve 56 preferably is set as shown in the figure replaces above-mentioned two negative pressure valves, it alternately closes accepting chamber 1 and 2.For this reason, accepting

chamber

1,2 is in downside terminates in

discharge connection

45,46 respectively, and they are useful on the

backstop

55 and 66 of negative pressure valve 56 in the design of the seamed edge place of its circumference.Negative pressure valve is installed between these

backstops

55 and 66 pivotally.It can integral design be single rubber parts preferably, and here gyroaxis is made of the zone 57 that thickness reduces as shown in the figure.Negative pressure valve 56 has cut out accepting chamber 2 in Figure 13, and meanwhile the direction towards outlet 7 has discharged accepting chamber 1, so liquid can flow out there.Otherwise if having negative pressure at accepting chamber 1 place, then negative pressure valve 56 is turned back to position shown in Figure 14, and it has been closed accepting chamber 1 and has discharged accepting chamber 2 simultaneously in this case, so that flow out the liquid that accumulates in the there through exporting 7.Here, the negative pressure that is collected in the gravity of the liquid in the accepting chamber 2 and existence in accepting chamber 1 supports one another, so negative pressure valve 56 carries out very fastly for the revolution that ON/OFF replaces.Different with the form of implementation of Fig. 2 to 11,

valve

5,6 can not take place just in case to each other obstruction during lag motions.

It is simple especially and maintenance workload is extremely low that the form of implementation of Fig. 2 to 14 expression is designed to frame for movement, and can move on reliable operation ground in continuous high pumping power.

Figure 15 represents a kind of form of implementation of having only a suction motor 3 equally through remodeling.In pressing the form of implementation of Figure 12, there is the leverage of two

control levers

35,36 to realize control from which accepting

chamber

1,2 just in time deflates by one,

control lever

35,36 makes conversion valve 37 revolutions alive, and the suction side with suction motor 3 alternately is connected with accepting

chamber

1,2 thus.Here, main valve is made of conversion valve 37 alive.

Figure 16 and 17 expressions are by another form of implementation of separate unit electric motor type liquid aspirator of the present invention, wherein, control by which accepting

chamber

1,2 just in time the control device of fill liquid constitute by container itself.For this reason, container 13 is installed as can be rotating, exactly, and preferably as shown in the figure around substantially horizontal axle 38 swings.Each accepting

chamber

1,2 of container 13 has an

aspirating hole

17,18 again, and by the revolution of container 13, one of them aspirating

hole

17,18 alternately is connected or separates with it with the suction side of suction motor 3.If aspirating

hole

17,18 has identical distance from gyroaxis or swinging axle 38, when the wainscot wall area of the container 13 especially there was designed to the circular arc bending, then the sealing of aspirating hole can be simplified.Here the form of implementation shown in those figure of front is such, and aspirating

hole

17,18 constitutes main valve equally with the wall of container 13.In the form of implementation of Figure 16 and 17, the mechanical connection of main valve or coupling cause by container 13 rigid shapes own.

The revolution of container 13 can be undertaken by motor, especially controls by time variable.But preferably container 13 is divided into by this way each accepting

chamber

1,2, that is, makes, carry out the center of gravity displacement in 1, the 2 liquid-filled amounts increases of an accepting chamber with when another accepting

chamber

2,1 is discharged liquid.Thus, container 13 is turned back to one automatically another accepting

chamber

2,1 is discharged to carry out filling the position of these accepting

chamber

1,2 emptyings.Container 13 has the shape of the cylinder that keeping flat or spheroid as shown in the figure basically and is divided into two by dividing plate 40 accepting

chamber

1,2 of semi-circular cross-section basically, thus, has realized this distribution in simple especially mode.Preferably, aspirating

hole

17,18 is adjacent to be located at the dividing plate both sides, and, be located at the both sides of dividing plate 40 equally at opposite end for the outlet of

negative pressure valve

5,6 in form.In Figure 16, aspirating hole 17 is connected with the suction side of suction motor 3, so liquid does not have in a figure in the suction joint suction accepting chamber 1 of expression.Meanwhile, another aspirating hole 18 of another accepting chamber 2 and on the pressure side or with surrounding air being communicated with of suction motor 3, so open negative pressure valve 6 under the liquid gravity effect in being in accepting chamber 2, liquid can flow out from accepting chamber 2.Increase gradually and emptying accepting chamber 2 by accepting chamber 1 charging quantity, realized the center of gravity displacement in the container 13, thereby make container 13 wraparound rotating shafts 38 counterclockwise be turned back to Figure 17 from Figure 16 automatically, liquid is drawn into accepting chamber 2 in and liquid can be from accepting chamber 1 outflow in Figure 17 thus.

In a word, be to implement liquid suction operation continuously by the characteristics of form of implementation of the present invention, therefore, compare with traditional liquid aspirator, pumping velocity doubles under the identical situation of motor power (output).Be applicable to removing pond, garden by liquid aspirator of the present invention preferably as the mud aspirator.Carry other liquid but they for example also are applicable to, even they contain many solids and/or higher viscosity is arranged, construction material for example is as mortar slag charge, mortar or the like.

Claims

1. liquid aspirator, comprise a container (13), liquid is by suction motor (3,4) by suction joint (15) can the described container of suction (13) in, and liquid can be discharged by an outlet (7) from described container (13), it is characterized by: described container (13) has at least two accepting chambers that separate (1,2) and a control device, described accepting chamber (1,2) can pass through main valve (19 respectively, 20) with respect to suction motor (3,4) suction side is sealed, by described control device alternately to an accepting chamber (1,2) carry out liquid-filled, another accepting chamber (2 during this period, 1) emptying.

2. according to the described liquid aspirator of claim 1, it is characterized by, for each accepting chamber (1,2) sets a suction motor (3,4), and each suction motor (3,4) is alternately connected and cut off to control device.

3. according to the described liquid aspirator of claim 1, it is characterized by, a suction motor (3) is designed to make in a plurality of accepting chambers of liquid alternated ground suction (1,2) by control device.

4. according to the described liquid aspirator of claim 1, it is characterized in that described control device is set to a kind of machine control unit.

5. according to the described liquid aspirator of claim 1, it is characterized by, this liquid aspirator is used to aspirate or carry the liquid that contains solid.

6. according to the described liquid aspirator of claim 1, it is characterized by, main valve (19,20) is coupling mutually by this way, that is, they are are alternately opened and closed.

7. according to the described liquid aspirator of claim 6, it is characterized by, main valve (19,20) is mechanical connection mutually.

8. according to the described liquid aspirator of one of claim 1 to 7, it is characterized by, main valve (19,20) is by leverage coupling.

9. according to the described liquid aspirator of claim 8, it is characterized by, described leverage revolution one conversion valve (37) alive, this conversion valve alive alternately is connected the suction side of suction motor (3) with one of accepting chamber (1,2).

10. according to the described liquid aspirator of claim 9, it is characterized by, conversion valve alive (37) constitutes main valve.

11., it is characterized by: in each accepting chamber (1,2), a float (9,10) is fixed in the guiding device (11,12) according to the described liquid aspirator of one of claim 1 to 7.

12. according to the described liquid aspirator of claim 11, it is characterized by, float (9,10) is arranged in such a way the below in corresponding main valve (19,20), that is when, the rising of liquid surpasses the level of stipulating in accepting chamber (1,2) float (9,10) being pressed against main valve (19,20) goes up and it is closed.

13. according to the described liquid aspirator of claim 11, it is characterized by, the guiding device (11,12) of float (9,10) lower region run through and be designed to seal at circumference in upper zone (11 ', 12 ') and closely be centered around the float (9,10) that the there is in raised position.

14. according to the described liquid aspirator of one of claim 1 to 7, it is characterized by, accepting chamber (1,2) sealably is connected with the discharge side of suction motor (3,4) by a secondary valve (23,24) respectively.

15. according to the described liquid aspirator of claim 14, it is characterized by, in each accepting chamber (1,2) float (9,10) is fixed in the guiding device (11,12), suction motor (3,4) is discharged side and is carried out with the guiding device (11,12) that is connected by float (9,10) of each accepting chamber (1,2).

16. according to the described liquid aspirator of claim 15, it is characterized by, extend an interface channel (42) from that side of secondary valve (23,24) towards adjacent float (9,10) respectively back to suction motor (3,4) discharge side.

17. according to the described liquid aspirator of claim 14, it is characterized by: the main valve (19,20) and the secondary valve (23,24) of each accepting chamber (1,2) are coupled by this way, that is, they are are alternately opened and closed.

18. according to the described liquid aspirator of claim 17, it is characterized by, the Coupling Design of main valve (19,20) and secondary valve (23,24) is mechanical.

19. according to the described liquid aspirator of claim 18, it is characterized by, main valve (19,20) is by a rocking bar (21) coupling.

20. according to the described liquid aspirator of claim 18, it is characterized by: secondary valve (23,24) is by another rocking bar (25) coupling.

21. according to the described liquid aspirator of claim 18, it is characterized by, main valve (19,20) is by a rocking bar (21) coupling, and secondary valve (23,24) is by another rocking bar (25) coupling, and the rocking bar (21,25) of main valve (19,20) and secondary valve (23,24) is rigidly connected mutually.

22. according to the described liquid aspirator of one of claim 1 to 7, it is characterized by, accepting chamber (1,2) cylindrical shape is arranged basically and/or same volume is arranged basically and/or mutually cover be provided with slottingly.

23. according to the described liquid aspirator of one of claim 1 to 7, it is characterized by, accepting chamber (1,2) can be closed by a public negative pressure valve (56) at downside, this negative pressure valve is installed as and can turns round between two backstops (55,66), its retaining is leaned against always close an accepting chamber (1,2) when one of them backstop (55,56) goes up and another accepting chamber (2,1) is opened towards outlet (7) direction.

24. according to the described liquid aspirator of one of claim 1 to 7, it is characterized by, container (13) is mounted to and can turns round.

25. according to the described liquid aspirator of claim 24, it is characterized by, container (13) is mounted to around a substantially horizontal axle (26) and can swings.

26. according to the described liquid aspirator of claim 24, it is characterized by, each accepting chamber of container (13) (1,2) has an aspirating hole (17,18), this aspirating hole alternately is connected with the suction side of suction motor (3) by the revolution of container (13).

27. according to the described liquid aspirator of claim 26, it is characterized by, aspirating hole (17,18) is located in the zone of wall of container (13), this zone design is with the radius of the substantial constant curved arc around container (13) gyroaxis.

28. according to the described liquid aspirator of claim 24, it is characterized by, container (13) is divided into each accepting chamber (1,2) by this way, promptly, when the liquid-filled amount of accepting chamber (1,2) increases, cause the center of gravity displacement, make container (13) be turned back to one automatically by the center of gravity displacement another accepting chamber (2,1) discharged to carry out the position of filling.

29. according to claim 1 to 7 once do not comprise the described liquid aspirator of claim 22, it is characterized by, container (13) has circular cross section basically, it is divided into two cross sections by a dividing plate (40) and is essentially semicircular accepting chamber (1,2).

30. according to the described liquid aspirator of claim 29, it is characterized by, container (13) is mounted to and can turns round; Each accepting chamber of container (13) (1,2) has an aspirating hole (17,18), and this aspirating hole alternately is connected with the suction side of suction motor (3) by the revolution of container (13); Each aspirating hole (17,18) is adjacent to be located at dividing plate (40) both sides, and establishes closed outlet in the opposed both sides of dividing plate (40) respectively.