CN201599261U

CN201599261U - Multistage liquid jet vacuum extractor

Info

Publication number: CN201599261U
Application number: CN2009202710989U
Authority: CN
Inventors: 潘健
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-11-27
Filing date: 2009-11-27
Publication date: 2010-10-06
Anticipated expiration: 2019-11-27

Abstract

The utility model relates to the technical field of a vacuum extractor, in particular to a multistage liquid jet vacuum extractor, which comprises at least two water jet exhausters which are connected with each other in series through a pipeline to form a multistage liquid jet vacuum extractor. An intake pipe (8) of a first stage water jet exhauster (12) is provided with a parallel pipeline (9) of which the other end can be connected with the intake pipe (8) of the other water jet exhauster (12). The multistage liquid jet vacuum extractor is also connected with an oil jet exhauster to form a multistage oil-water mixed exhaust system. The utility model has the advantage of reasonable structure and high exhaust efficiency, which can flexibly select the medium or the stage according to the connected vacuum extractor.

Description

A kind of multistage liquid jet vacuumizing equipment

Technical field

The utility model relates to a kind of technical field of vaccum-pumping equipment, specifically a kind of multistage liquid jet vacuumizing equipment.

Background technique

Along with development and national economy, the technology that vacuumizes is widely used in power supply Heat Supply Engineering, food engineering, pharmaceutical engineering, bioengineering, chemical engineering, material engineering and agricultural byproducts deep processing, and air exhauster is wherein a kind of vaccum-pumping equipment efficiently.Wherein the jet-type air exhauster is with its little power consumption, and Economy height, operating cost hang down and be widely adopted, and the jet-type air exhauster divides the jetting formula and the formula of emanating by working medium.The formula of emanating air exhauster is made the work medium with high pressure steam, though the extract system of existing multistage linkage structure, it is less economical, also needs to be provided with in addition the vapour source when sliding parameter starts, need during varying duty constantly to adjust the working steam parameter, be only applicable to the small capacity vaccum-pumping equipment.Jetting formula air exhauster is to make the work medium with press water, present jetting formula air exhauster generally all adopts the single-stage extract system, pumping efficiency is lower, energy consumption is big, temperature, pressure are required height, need a large amount of moisturizings, change water in order to reduce water temperature, water consumption is big, particularly jumbo vaccum-pumping equipment, very difficult maintenance is evacuated the most favourable degree of vacuum of equipment.The jetting formula air exhauster of minority has adopted the two-stage extract system, this two-stage extract system is parallel structure, its objective is in order to prevent one of them extract system standby after breaking down, and be evacuated in the normal operation behind the device start is not that two extract systems are simultaneously in work, and after breaking down, need manually change another extract system, automaticity is low.In addition, the working medium of use is single, can not satisfy the needs of different occasions, and particularly under hot environment, when the connected temperature that is sucked equipment was higher, the WATER AS FLOW MEDIUM temperature raise fast, the influence effect of bleeding.System's medium water is under the working environment of high negative pressure, and when temperature reaches nearly 40 when spending, water just is vaporized easily, has a strong impact on pumping efficiency.

Summary of the invention

In order to overcome above-mentioned defective, it is a kind of rational in infrastructure that the utility model provides, and the pumping efficiency height can be selected the multistage liquid jet vacuumizing equipment of medium or progression flexibly according to the equipment situation that is evacuated that connects for use.

The technical solution adopted in the utility model is: a kind of multistage liquid jet vacuumizing equipment, comprise at least two jetting air exhauster, each jetting air exhauster is connected in series by pipeline and forms multistage jetting air exhauster structure, described jetting air exhauster comprises water tank and water jet air ejector, water tank is connected the below of water jet air ejector, water pump is connected with the water tank of the first order by pipeline, be communicated with by STEAM TRAP and adjustment valve between water tanks at different levels, the other end of water pump all is connected with each water jet air ejector by pipeline, and make WATER AS FLOW MEDIUM between the water tank of each jetting air exhauster and water jet air ejector, form circulation waterway; Described water jet air ejector comprises nozzle, mixing chamber and diffuser pipe, nozzle is arranged on the top in the mixing chamber, its upper end is communicated with the feed-water end of circulation waterway pipeline, and on the mixing chamber sidewall, spout place, nozzle lower end has suction port, suction port is connected with suction tude; Described diffuser pipe is connected the mixing chamber below, and diffuser pipe is connected with water tank; Have relief opening at water tank upper, the relief opening of previous stage water tank is communicated with formation and is connected in series with the suction tude of the jetting air exhauster of next stage.

The parallel transistor that on the suction tude of the water jet air ejector of the first order, connects a parallel connection, the other end of this parallel transistor can be communicated with the suction tude of any water jet air ejector except that the water jet air ejector of the first order, front portion in described two pipeline connections place respectively is provided with valve, and described valve all is connected with the electric contact vacuum gauge.

The front portion of the first order jetting air exhauster in described multistage jetting air exhauster is provided with one and penetrates oily air exhauster, this is penetrated oily air exhauster and comprises oil pump, fuel tank and penetrate oily air ejector, the below of penetrating oily air ejector is communicated with fuel tank, oil pump and fuel tank and penetrate oily air ejector and be connected and make medium oil at fuel tank and penetrate and form the closed circulation oil circuit between the oily air ejector, penetrate oily air ejector and comprise oil nozzle, mixing chamber and diffuser pipe, oil nozzle is arranged on the interior top of mixing chamber and is connected with the oil inlet end of circulating oil path pipeline, the mixing chamber below is provided with diffuser pipe, be horizontally arranged with distribution piping at the fuel tank internal upper part, distributing on the distribution tube wall, it is porose to be provided with, diffuser pipe extend in the fuel tank and is communicated with distribution piping, have outlet pipe on fuel tank top, this outlet pipe is communicated with the suction port of the jetting air exhauster of the first order, is provided with cooler at the front side or the rear side of oil pump.

Be provided with the mixing waste pipe of same inner diameter below described diffuser pipe, diffuser pipe is connected with water tank by the mixing waste pipe of below.

The sheathed breathing pipe in the outside of water tank upper, diffuser pipe, the breathing pipe upper end is tightly connected with the diffuser pipe outer wall, and described relief opening is arranged on the sidewall of breathing pipe.

The float-ball type safety check is set on the suction tude of first order jetting air exhauster, this safety check comprises ball float, positioning ring, valve block and bringing into, the housing of air outlet, described positioning ring is horizontally fixed on middle part in the housing, positioning ring is plate-like, its outer rim shape is corresponding with the housing cavity shape, its center is provided with positioning hole, but the disk body of positioning ring is provided with the space that at least two supplied gas are passed through, described ball float is arranged on the below of positioning ring, ball float top is provided with connecting rod, and small end passes from positioning hole, and small end is provided with anti-fall, anti-fall greater than positioning hole, middle part at connecting rod is provided with valve block, and valve block is slightly less than positioning ring, below valve block, the arranged outside of ball float has the ball float guide channel, the ball float guide channel is fixedlyed connected with housing, but the ball float guide channel is provided with the space that supplied gas is passed through.

The water tank of each jetting air exhauster all is connected with a cyclic water tank with STEAM TRAP by adjusting valve, cyclic water tank is connected with water pump, and cyclic water tank is provided with vacuum tube and is connected with the suction tude of first order jetting air exhauster or is connected with the suction tude of second level jetting air exhauster.

The utility model is connected in series a plurality of jetting air exhauster, form multistage extract system, can continue being evacuated equipment, vacuum draw efficiently, this structure has improved pumping efficiency greatly, guarantee the most favourable degree of vacuum of the equipment that is evacuated, thereby guaranteed the good operation effect of the equipment that is evacuated; The utility model also is provided with parallel transistor multistage jetting air exhauster is realized structure in parallel, the series connection complex form, use at different situations or demand, usually need in a large number at the equipment that is evacuated, fast during intake-gas, when just having started as steam turbine equipment, make vapour condenser reach vacuum state fast, adopt the form that is connected in parallel.When needs are evacuated equipment and need continue to keep high vacuum, the form that employing is connected in series, as entering the normal operation state when steam turbine equipment, vapour condenser will continue to keep high vacuum, jetting air exhauster at different levels then use the series connection form, with the high vacuum of maintenance vapour condenser, thus the thermal efficiency of cycle of raising steam turbine set, the working efficiency of raising equipment.The utility model also can be selected the progression of medium or air exhauster flexibly according to user demand or occasion, to reach best user mode.

Description of drawings

Fig. 1 is the utility model embodiment 1 a structural representation

Fig. 2 is the utility model embodiment 2 a structural representation

Fig. 3 is the utility model embodiment 3 a structural representation

Fig. 4 is the structural representation of the utility model float-ball type safety check

Embodiment

Now the utility model is described in further detail in conjunction with the accompanying drawings, Fig. 1 is embodiment 1 of the present utility model, its technological scheme that adopts is: a kind of multistage jetting formula air-extractor, comprise four jetting air exhauster, and described four jetting air exhauster are by the pipeline formation quaternary structure that is connected in series.Described jetting air exhauster comprises water tank 1 and water jet air ejector 2, and working medium is a water, also can be oil, and water tank 1 is connected the below of water jet air ejector 2, generally all is provided with level meter on water tank 1, is used to observe the water level situation.Water pump 3 is connected with the water tank 1 of the first order by pipeline, can also near the pipeline the water pump filter be set, and is used for the impurity of filter medium water.Water tanks 1 at different levels are connected with adjustment valve 8 by STEAM TRAP 7, with negative pressure and the water level that keeps water tanks 1 at different levels to improve step by step.The other end of water pump 3 all is connected with each water jet air ejector 2 by pipeline, and except that afterbody jetting extraction turbine, all the other closed circulation water routes that are at different levels, be that WATER AS FLOW MEDIUM forms the closed circulation water route between water tank 1 and water jet air ejector 2, because of the relief opening on the afterbody water tank 1 is communicated with atmosphere, so only form circulation waterway rather than seal, general afterbody water tank 1 also claims final stage water tank 1, outlet valve 16 is installed on the relief opening on the final stage water tank 1, and gas enters atmosphere through outlet valve 16.Described water jet air ejector 2 comprises nozzle 4, mixing chamber and diffuser pipe 5, nozzle 4 is arranged on the top in the mixing chamber, its upper end is communicated with the feed-water end of circulation waterway pipeline, and on the mixing chamber sidewall, spout place, nozzle 4 lower end has suction port, suction port is connected with suction tude 6.Described diffuser pipe 5 is connected the mixing chamber below, and diffuser pipe 5 general diameters are greater than nozzle 4 apertures, and its upper end-hole is corresponding to position under nozzle 4 spouts, and its underpart extend in the water tank 1.Have relief opening on water tank 1 top, the relief opening of previous stage water tank 1 is communicated with formation and is connected in series with the suction tude 6 of the water jet air ejector of next stage 2.In the end the water tank 1 of one-level jetting air exhauster is provided with flow-off and water supplement port.

The suction tude 6 of first order jetting air exhauster of the present utility model is connected with the equipment of being evacuated, present embodiment is described its working principle with the vapour condenser of steam turbine as the equipment that is evacuated, the suction tude 6 of first order jetting air exhauster is connected with vapour condenser in the present embodiment, on suction tude 6, can also be provided with safety check, prevent that gas from refunding vapour condenser.During use, under the effect of water pump 3, WATER AS FLOW MEDIUM circulates between water jet air ejector at different levels 2 and water tank 1, WATER AS FLOW MEDIUM sprays from nozzle 4, form one high-speed jet, outside nozzle 4 spouts, form under the strong ejector action, the incondensable gas of the vapour condenser that suction is communicated with mixing chamber, then in diffuser pipe 5 is pumped to water tank 1, in water tank 1, carry out water, gas separates, be that water falls into circulation and suction vapour condenser are continued in water tank 1 back under water pump 3 effects gas, and gas enters the suction tude 6 of next stage through relief opening on water tank 1 top, be pumped to the water tank 1 of next stage by the water jet air ejector 2 of next stage, constantly suction is until afterbody water tank 1 continuously by the one-level level like this for gas, and the relief opening from afterbody water tank 1 enters atmosphere then.Therefore the gas in the vapour condenser is like this by the continuous continuous sucking of jetting air exhauster of plural serial stage, the pumping efficiency height, the degree of vacuum height of vapour condenser, the jetting air exhauster of present embodiment are the level Four series connection, and the degree of vacuum that is evacuated equipment can reach reasonable effect.Working medium in the present embodiment is a water, also can be oil, adopts oil to be applicable to that as working medium operation is evacuated equipment in high temperature, the dry environment, as vacuum drying equipment.Also can be to flexibly connect between the jetting air exhauster at different levels of the present utility model, if rate of air sucked in required reduces, the jetting air exhauster that can cut out the back be with energy efficient.

Fig. 2 is embodiment 2 of the present utility model, embodiment 2 is except that increasing following technical proposals, all the other are all identical with embodiment 1, the technological scheme that increases among the embodiment 2 is: the sheathed courage pipe 15 in the outside of water tank 1 top, diffuser pipe 5, courage pipe 15 upper ends and diffuser pipe 5 outer walls are tightly connected, and described relief opening is arranged on the sidewall of courage pipe 15; The parallel transistor 9 of a parallel connection is set on the suction tude 6 of the water jet air ejector 2 of the first order, the other end of this parallel transistor 9 can be communicated with the suction tude 6 of any water jet air ejector 2 except that the water jet air ejector 2 of the first order, set up a relief opening and outlet valve 16 on the water tank 1 of the previous stage of that grade jetting air exhauster that parallel transistor 9 is communicated with it, this outlet valve 16 is used for discharging gas to atmosphere.The parallel transistor 9 of present embodiment is communicated with the suction tude 6 of the water jet air ejector 2 of the third level, have additional outlet valve 16 at partial water tank 1, front portion in described two pipeline connections place respectively is provided with valve, be that a valve is called for short valve 21 in parallel on parallel transistor 9 roads, a valve is arranged on the suction tude 6 that is used to connect, be called for short series connected valve 22.If open valve 21 in parallel, close series connected valve 22, and open the outlet valve 16 of second level water tank 1, this equipment is the first order with second level jetting air exhauster is that two-stage series connection is connected and forms one group, the third level is one group that two-stage series connection is connected with fourth stage jetting air exhauster, between two groups for being connected in parallel, during work, the air exhauster of two groups of two-stage series connections is simultaneously to being evacuated the equipment intake-gas, the gas outlet valve 16 from the water tank 1 of two groups final stage jetting air exhauster is respectively gone into atmosphere, i.e. outlet valve 16 exhausts of the outlet valve 16 of second level water tank 1 and fourth stage water tank 1.This parallel form is applicable to that the equipment that is evacuated needs in a large number, suction gas wherein fast, uses when forming the state of vacuum fast.When just having started, need to aspirate in a large number, fast the gas in the vapour condenser, make vapour condenser reach vacuum state fast as steam turbine equipment.Though parallel form energy rapid vacuumizing, but the degree of vacuum that reaches is not high, so make the equipment of being evacuated reach lasting, during higher degree of vacuum, should adopt the series connection form, promptly valve 21 in parallel is closed, series connected valve 22 is opened, and the outlet valve on the second level water tank 1 16 is closed, so just form the structure that the level Four the same with embodiment 1 connected, after this cascaded structure is applicable to that steam turbine equipment runs well, the high vacuum state that keeps vapour condenser to continue is guaranteed and is kept the most favourable vacuum of vapour condenser, thereby guarantees the optimal operating condition of steam turbine set.Reaching above-mentioned effect just needs the air exhauster of plural serial stage vapour condenser to be carried out continuous, continuous suction, the pumping efficiency height.Outlet valve 16 on the previous stage water tank 1 of valve in parallel 21 of the present utility model, series connected valve 22 and the jetting air exhauster that is connected with parallel transistor 9 can be connected with the electric contact vacuum gauge simultaneously, the effect of electric contact vacuum gauge is to control connected three valve openings respectively automatically or close according to the degree of vacuum of setting, realize that promptly this devices in series connects and the automatic switchover that is connected in parallel, automaticity height.It is in order to reduce the opening of water tank 1 that present embodiment is arranged on purpose on the courage pipe 15 with relief opening, thereby reduces leakage point, has also reduced the volume of water tank 1.More than 4 centimetres, be convenient to from the space of courage pipe 15 and diffuser pipe 5 by just can by gas greater than diffuser pipe 5 diameters for the diameter of general courage pipe 15 in the utility model.Courage pipe 15 upper ends can be tightly connected at the middle part and the diffuser pipe 5 of diffuser pipe 5, also can press close to the mixing chamber place on diffuser pipe 5 tops and diffuser pipe 5 is tightly connected.

Fig. 3 is embodiment 3 of the present utility model, embodiment 3 is except that increasing following technical proposals, all the other are all identical with embodiment 1, the technological scheme that increases among the embodiment 3 is: the front portion of the first order jetting air exhauster in described multistage jetting air exhauster is provided with one and penetrates oily air exhauster, working medium is an oil, forms multi-grade oil, water mixing air-extractor.This is penetrated oily air exhauster and comprises oil pump 10, fuel tank 11 and water jet air ejector 12, the below of water jet air ejector 12 is communicated with fuel tank 11, and oil pump 10 is connected with fuel tank 11 and water jet air ejector 12 and makes medium oil form an independently closed circulation oil circuit between fuel tank 11 and water jet air ejector 12.Water jet air ejector 12 comprises oil nozzle, mixing chamber and diffuser pipe 5, and oil nozzle is arranged on the interior top of mixing chamber and is connected with the oil inlet end of circulating oil path pipeline.On the mixing chamber sidewall, spout place, oil nozzle lower end has suction port, suction port is connected with suction tude 6, this suction tude 6 is connected with the equipment of being evacuated.The mixing chamber below is provided with diffuser pipe 5, be horizontally arranged with distribution piping 5 at fuel tank 11 internal upper parts, distributing on distribution piping 5 walls, it is porose to be provided with, diffuser pipe 5 extend in the fuel tank 11 and is communicated with distribution piping 5, distribution piping 5 in the present embodiment is the oval ring pipe, can also be the individual tubes of cross setting, or the bottom distribution be provided with porose plate-like structure etc.Because it is slower that oil conducts heat, distribution piping 5 is set to be connected with diffuser pipe 5, the dispersion of deep fat equilibrium that can the temperature that stream in the diffuser pipe 5 comes is higher falls in the fuel tank 11, rather than only fall into the oil temperature of neutral position in the middle of causing than around the oil temperature high, oil temperature with the centre around making in the fuel tank 11 is consistent, also helps the heat radiation and the cooling of oil like this.Have outlet pipe on fuel tank 11 tops, this outlet pipe is communicated with the suction port of the jetting air exhauster of the first order, front side or rear side at oil pump 10 are provided with cooler 14, the cooler 14 of present embodiment is arranged on oil pump 10 front sides, cooler 14 can also be arranged in the fuel tank 11, cooler 14 is used for cooling medium oil.Present embodiment is provided with one again in multistage jetting air exhauster front portion and penetrates oily air exhauster, form multi-grade oil, water mixing air-extractor, the air-extractor of this form is applicable to the operating ambient temperature height and the demanding situation of degree of vacuum of the equipment of being evacuated, because the heat transfer efficiency of oil is more much lower than water, slow and the oil of warming velocity can not vaporized usually, if adopting multistage all is the form of penetrating oily air exhauster series connection, bigger with oil mass, cost is higher.So anterior the employing penetrated oil and bled and can prevent that working medium is vaporized, the rear portion adopts multistage jetting air exhauster series connection shape can guarantee good degree of vacuum.Of the present utility modelly penetrate the back that oily air exhauster can also be arranged on the jetting air exhauster, promptly before the form of oil behind the water, be used to the environment of the equipment that is evacuated for band water.

The utility model can also be provided with the mixing waste pipe of same inner diameter in diffuser pipe 5 bottoms, mixing waste pipe can be connected with diffuser pipe 5 by flange, also can connect by other usual way, as welding etc., diffuser pipe 5 is connected with water tank 1 by the mixing waste pipe of below.It is the structure that the diffuser pipe 5 that a former length is long makes two connections into that the purpose of mixing waste pipe is set, because diffuser pipe 5 tops make the precision height, the bottom required precision is low, is convenient to like this process and install.

The utility model can also be provided with a cyclic water tank, the water tank 1 of each jetting air exhauster all is connected with cyclic water tank with STEAM TRAP 7 by adjusting valve 8, be provided with vacuum tube is connected with the suction tude 6 of first order jetting air exhauster or is connected with the suction tude 6 of second level jetting air exhauster on cyclic water tank top, therefore the first order or 2 pairs of vapour condenser intake-gas of the second level water jet air ejector time also the gas to cyclic water tank aspirate, vacuum tube can make cyclic water tank form high vacuum when being connected with the air exhauster of the first order, this structure is fit to use when working medium is oil, and the moisture content of water contained in the medium oil or vaporized state is extracted out together with gas; Vacuum tube can make negative pressure value and the first order water tank 1 in the cyclic water tank basic identical when being connected with second level air exhauster, and greater than the negative pressure value of subsequent stages water tank 1, the water that helps subsequent stages water tank 1 like this enters cyclic water tank.The moisturizing door can be set on cyclic water tank, and water pump 3 is connected with cyclic water tank, and the water in the cyclic water tank can remain certain water level like this, WATER AS FLOW MEDIUM can not occur and be evacuated phenomenon, prevents the air exhauster malfunction.

The utility model can also be provided with the float-ball type safety check on the suction tude 6 of first order jetting air exhauster, see Fig. 4, this safety check comprise ball float 33, positioning ring 31, valve block 32 and bring into, the housing 35 of air outlet.Housing 35 is generally cylindrical, and suction port generally is connected with the equipment of being evacuated last, and as vapour condenser, the air outlet generally is connected with air ejector, as water jet air ejector 2 down.Described positioning ring 31 is horizontally fixed on middle part in the housing 35, positioning ring 31 is plate-like, its outer rim shape is corresponding with housing 35 cavity shapes, its center is provided with positioning hole, but the disk body of positioning ring 31 is provided with the space that at least two supplied gas are passed through, the space that present embodiment is two settings that evenly distribute, size is identical, the atmospheric channel resistance is more little more in the space.Described ball float 33 is arranged on the below of positioning ring 31, and ball float 33 tops are provided with connecting rod, and small end passes from positioning hole, and small end is provided with anti-fall, and anti-fall greater than positioning hole, and anti-fall is used to prevent that ball float 33 and connecting rod and positioning ring 31 break away from.Be provided with valve block 32 at the middle part of connecting rod, valve block 32 is slightly less than positioning ring 31, valve block 32 diameters are generally less than positioning ring 31 diameter 2-8 millimeters, and being convenient to valve block 32 can move up and down in housing 35 with connecting rod, can the ventilation space shutoff on the positioning ring 31 is just passable as long as satisfy valve block 32.Below valve block 32, the arranged outside of ball float 33 has ball float guide channel 34, ball float guide channel 34 is fixedlyed connected with housing 35, but ball float guide channel 34 is provided with the space that supplied gas is passed through.Ball float 33 can move up and down along ball float guide channel 34, drives valve block 32 simultaneously and moves up and down.When water jet air ejector 2 work, gas is entered in the housing 35 by suction port, and ball float 33 gravitates drive valve block 32 and fall, and form the space between valve block 32 and the positioning ring 31, and gas enters housing 35 belows and siphoned away by water jet air ejector 2 through the air outlet.When water jet air ejector 2 quits work, liquid forms backflow if enter housing 35 from the air outlet, the liquid that refluxes rises ball float 33, driving valve block 32 moves up, make valve block 32 be close to positioning ring 31, but and valve block 32 space shutoff that supplied gas on the positioning ring 31 is passed through, the gas of housing 35 bottoms or liquid can not enter the top of housing 35, reach the non-return effect.The float-ball type safety check is littler than conventional springs formula safety check air ventilation resistance.

This shows that the utlity model has rational in infrastructurely, the pumping efficiency height can be selected the characteristics such as medium or progression flexibly according to the equipment situation that is evacuated that connects.

Claims

1. multistage liquid jet vacuumizing equipment, it is characterized in that: comprise at least two jetting air exhauster, each jetting air exhauster is connected in series by pipeline and forms multistage jetting air exhauster structure, described jetting air exhauster comprises water tank (1) and water jet air ejector (2), water tank (1) is connected the below of water jet air ejector (2), water pump (3) is connected with the water tank (1) of the first order by pipeline, water tanks at different levels (1) are connected with adjustment valve (8) by STEAM TRAP (7), and the other end of water pump (3) all is connected with each water jet air ejector (2) by pipeline, and make WATER AS FLOW MEDIUM between the water tank (1) of each jetting air exhauster and water jet air ejector (2), form circulation waterway; Described water jet air ejector (2) comprises nozzle (4), mixing chamber and diffuser pipe (5), nozzle (4) is arranged on the top in the mixing chamber, its upper end is communicated with the feed-water end of circulation waterway pipeline, on the mixing chamber sidewall, spout place, nozzle (4) lower end has suction port, suction port is connected with suction tude (6); Described diffuser pipe (5) is connected the mixing chamber below, and diffuser pipe (5) is connected with water tank (1); Have relief opening on water tank (1) top, the relief opening of previous stage water tank (1) is communicated with formation and is connected in series with the suction tude (6) of the jetting air exhauster of next stage.

2. multistage liquid jet vacuumizing equipment according to claim 1, it is characterized in that: the suction tude (6) at the water jet air ejector (2) of the first order goes up the parallel transistor (9) that connects a parallel connection, the other end of this parallel transistor (9) can be communicated with the suction tude (6) of any water jet air ejector (2) except that the water jet air ejector (2) of the first order, front portion in described two pipeline connections place respectively is provided with valve, and described valve all is connected with the electric contact vacuum gauge.

3. multistage liquid jet vacuumizing equipment according to claim 1, it is characterized in that: the front portion of the first order jetting air exhauster in described multistage jetting air exhauster is provided with one and penetrates oily air exhauster, this is penetrated oily air exhauster and comprises oil pump (10), fuel tank (11) and penetrate oily air ejector (12), the below of penetrating oily air ejector (12) is communicated with fuel tank (11), oil pump (10) and fuel tank (11) and penetrate oily air ejector (12) and be connected and make medium oil at fuel tank (11) and penetrate and form the closed circulation oil circuit between the oily air ejector (12), penetrate oily air ejector (12) and comprise oil nozzle, mixing chamber and diffuser pipe (5), oil nozzle is arranged on the interior top of mixing chamber and is connected with the oil inlet end of circulating oil path pipeline, the mixing chamber below is provided with diffuser pipe (5), be horizontally arranged with distribution piping (13) at fuel tank (11) internal upper part, distributing on distribution piping (13) wall, it is porose to be provided with, diffuser pipe (5) extend in the fuel tank (11) and is communicated with distribution piping (13), have outlet pipe on fuel tank (11) top, this outlet pipe is communicated with the suction port of the jetting air exhauster of the first order, is provided with cooler (14) at the front side or the rear side of oil pump (10).

4. multistage liquid jet vacuumizing equipment according to claim 1 is characterized in that: be provided with the mixing waste pipe of same inner diameter in described diffuser pipe (5) below, diffuser pipe (5) is connected with water tank (1) by the mixing waste pipe of below.

5. multistage liquid jet vacuumizing equipment according to claim 1, it is characterized in that: at the sheathed breathing pipe in the outside (15) of water tank (1) top, diffuser pipe (5), breathing pipe (15) upper end is tightly connected with diffuser pipe (5) outer wall, and described relief opening is arranged on the sidewall of breathing pipe (15).

6. multistage liquid jet vacuumizing equipment according to claim 1, it is characterized in that: the float-ball type safety check is set on the suction tude of first order jetting air exhauster, this safety check comprises ball float (33), positioning ring (31), valve block (32) and bringing into, the housing of air outlet (35), described positioning ring (31) is horizontally fixed on middle part in the housing (35), positioning ring (31) is plate-like, its outer rim shape is corresponding with housing (35) cavity shape, its center is provided with positioning hole, positioning ring (31) but disk body be provided with the space that at least two supplied gas are passed through, described ball float (33) is arranged on the below of positioning ring (31), ball float (33) top is provided with connecting rod, small end passes from positioning hole, small end is provided with anti-fall, anti-fall greater than positioning hole, be provided with valve block (32) at the middle part of connecting rod, valve block (32) is slightly less than positioning ring (31), in valve block (32) below, the arranged outside of ball float (33) has ball float guide channel (34), ball float guide channel (34) is fixedlyed connected with housing (35), ball float guide channel (34) but be provided with the space that supplied gas is passed through.

7. according to each described multistage liquid jet vacuumizing equipment in the claim 1 to 6, it is characterized in that: the water tank of each jetting air exhauster (1) all is connected with a cyclic water tank with STEAM TRAP (7) by adjusting valve (8), cyclic water tank is connected with water pump (3), and cyclic water tank is provided with vacuum tube and is connected with the suction tude (6) of first order jetting air exhauster or is connected with the suction tude (6) of second level jetting air exhauster.