CN201326588Y - Steam jet vacuum pump - Google Patents
Steam jet vacuum pump Download PDFInfo
- Publication number
- CN201326588Y CN201326588Y CNU2008202375628U CN200820237562U CN201326588Y CN 201326588 Y CN201326588 Y CN 201326588Y CN U2008202375628 U CNU2008202375628 U CN U2008202375628U CN 200820237562 U CN200820237562 U CN 200820237562U CN 201326588 Y CN201326588 Y CN 201326588Y
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- China
- Prior art keywords
- steam
- nozzle
- steam jet
- vacuum pump
- model utility
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- Expired - Fee Related
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Abstract
The utility model relates to an improved steam jet vacuum pump which is characterized in that a steam pipe connected with a nozzle is in the same direction as the nozzle, a steam pressure stabilizing chamber is arranged at the inlet end of the steam pipe, and a gas mixing chamber has bent pipe structure. Compared with the prior art, the improved steam jet vacuum pump has the advantages that internal leakage is not easy to happen, the steam admission at the nozzle is stable, without being easily influenced by the fluctuation of the pressure of the inlet steam, the vacuumizing resistance is small, and the degree of vacuum is not easy to return and is more stable.
Description
Technical field
Model utility is about the improvement to steam jet vaccum, relates in particular in a kind of difficult generation to leak, and the resistance of bleeding is little, and vacustat is difficult for producing the steam jet vaccum of degree of vacuum bounce-back.
Background technique
Typical steam jet vaccum (Fig. 1), its structure comprises pump housing diffuser pipe 3, upper gas mixing chamber 2 has axial steam nozzle (Laval nozzle) in the gas mixer chamber 2.This structure steam jet vaccum, steam are by laterally entering, and are connected with axial steam nozzle by flanged (FLGD) bend pipe 1, are easy to generate interior leakage at flange connections like this, and serious meeting influences the vacuum pump performance; In addition, steam directly enters, when steam enters pressure surge big, can cause the degree of vacuum instability.Secondly, gas mixer chamber is a cylindrical structure, and resistance is big when causing pumped gas to suck; Besides, the pump housing diffuser pipe angle of throat of existing jet pump is bigger, usually at 10-15 °, easily produces the degree of vacuum bounce-back in course of injection, and influence vacuumizes efficient.Therefore still having is worth improved place.
The model utility content
The model utility purpose is to overcome the deficiency of above-mentioned prior art, provides in a kind of difficult generation to leak the steam jet vaccum that the resistance of bleeding is little.
Another purpose of model utility is to provide a kind of vacustat, is difficult for producing the steam jet vaccum of degree of vacuum bounce-back.
The model utility purpose realizes, main to improve one be to set up the steam plenum in the steam inlet of steam jet vaccum, makes that to enter nozzle steam stable by buffer space, even when inlet steam pressure has fluctuation, the also unlikely nozzle that directly fluctuates enters nozzle steam and keeps stable thereby make; The 2nd, change the steam approach axis, make the steam connection that enters axially with nozzle shaft in the same way, and adopt the external flange connection of steam plenum transition, avoided the interior leakage that may cause; The 3rd, with the steam jet vaccum gas mixer chamber, change bend pipe structure into by cylindrical structure, make it more to meet fluid mechanics, thereby reduced the pumped gas resistance.Overcome above-mentioned the deficiencies in the prior art, realized the model utility purpose.Specifically, the model utility steam jet vaccum has pump housing diffuser pipe, and the gas mixer chamber on top and built-in axial nozzle are formed, and it is characterized in that connecting the steam tube of nozzle and nozzle in the same way, and its entrance point has the steam plenum, and gas mixer chamber is bend pipe structure.
The said pump housing diffuser pipe of model utility, identical with prior art steam jet vaccum structure, there are tapered conical pipeline section, aditus laryngis, flaring taper pipeline section to constitute.
Gas mixer chamber, same as the prior art, effect is that the gas of pressure difference is mixed, and produces pumping action, and its bend angle is preferably the 45-90 degree, and test shows that this angle has the littler resistance of bleeding.
Model utility second purpose realizes, is that pump housing diffusion pipeline section two ends angle of throat is reduced, and by original 10-15 °, is reduced to 5-10 °, and little angle of throat has effectively reduced the degree of vacuum bounce-back, thereby makes the degree of vacuum of pumped gas more stable.
The model utility steam jet vaccum owing to adopt above-mentioned improvement, has than prior art: leak in being difficult for producing, the nozzle admission is stable, be not subject to enter the vapor pressure influence of fluctuations, and draw resistance is little, and it is more stable that degree of vacuum is difficult for bounce-back.
Below in conjunction with a specific embodiment; model utility is further understood in exemplary illustration and help; but embodiment's detail only is for model utility is described; do not represent model utility design whole technological schemes down; therefore should not be construed as the technological scheme qualification total to model utility, some do not depart from the unsubstantiality of model utility design and change In the view of the technician; for example change or replace, all truely use novel protected scope so that technical characteristics with same or similar technique effect is simple.
Description of drawings
Fig. 1 is a prior art steam jet vaccum structural representation.
Fig. 2 is a model utility steam jet vaccum structural representation.
Embodiment
Embodiment: referring to Fig. 2, the model utility steam jet vaccum, comprise that the two ends angle of throat is 8 ° a pump housing diffuser pipe 3, the crooked bend pipe gas mixer chamber 2 of top 90 degree, pump housing diffuser pipe top vertically is provided with, has the Laval nozzle of welding connecting tube 1, entrance point has steam plenum 4, is connected with steam line outward.
To those skilled in the art; under model utility design and embodiment's enlightenment; some distortion that can directly derive or associate from this patent disclosure and general knowledge; or the substituting of known technology commonly used in the prior art; and the mutual various combination between feature; steam plenum Volume Changes for example; gas mixer chamber bend pipe angle changes; pump housing diffuser pipe angle of throat changes or the like; can both realize and basic identical function of the foregoing description and effect; launch for example no longer one by one to describe in detail, all belong to this patent protection domain.
Claims (3)
1, steam jet vaccum has pump housing diffuser pipe, and the gas mixer chamber on top and built-in axial nozzle are formed, and it is characterized in that connecting the steam tube of nozzle and nozzle in the same way, and its entrance point has the steam plenum, and gas mixer chamber is bend pipe structure.
2,, it is characterized in that the bend pipe gas mixer chamber is the bending of 45-90 degree according to the described steam jet vaccum of claim 1.
3,, it is characterized in that pump housing diffuser pipe two ends angle of throat is 5-10 ° according to claim 1 or 2 described steam jet vaccums.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202375628U CN201326588Y (en) | 2008-12-25 | 2008-12-25 | Steam jet vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202375628U CN201326588Y (en) | 2008-12-25 | 2008-12-25 | Steam jet vacuum pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201326588Y true CN201326588Y (en) | 2009-10-14 |
Family
ID=41178560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202375628U Expired - Fee Related CN201326588Y (en) | 2008-12-25 | 2008-12-25 | Steam jet vacuum pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201326588Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102865258A (en) * | 2012-10-17 | 2013-01-09 | 南通赛孚机械设备有限公司 | Low-energy consumption steam jet vacuum pump |
-
2008
- 2008-12-25 CN CNU2008202375628U patent/CN201326588Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102865258A (en) * | 2012-10-17 | 2013-01-09 | 南通赛孚机械设备有限公司 | Low-energy consumption steam jet vacuum pump |
| CN102865258B (en) * | 2012-10-17 | 2015-10-07 | 南通赛孚机械设备有限公司 | A kind of low-energy consumption steam jet vacuum pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091014 Termination date: 20131225 |