CN101428261A - Stephanoporate gather air cap for inhalation type sand-blasting gun - Google Patents
Stephanoporate gather air cap for inhalation type sand-blasting gun Download PDFInfo
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- CN101428261A CN101428261A CNA2008101834575A CN200810183457A CN101428261A CN 101428261 A CN101428261 A CN 101428261A CN A2008101834575 A CNA2008101834575 A CN A2008101834575A CN 200810183457 A CN200810183457 A CN 200810183457A CN 101428261 A CN101428261 A CN 101428261A
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- air nozzle
- sand
- blasting gun
- nozzle
- porous
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Abstract
The invention discloses a porous convergence air nozzle for a suction-type sandblaster. The air nozzle is characterized in that axis symmetrically-distributed porous convergence air nozzle substitutes for a single-hole air nozzle and an annular-gap air nozzle in the prior art. Because the condition for sand in a blast nozzle to obtain energy form the air jet is improved, the induction efficiency and the sandblasting efficiency of the sandblaster are effectively improved.
Description
The present invention relates to the improvement design of a vitals air nozzle in the suction-type sand-blasting gun.Belong to sandblast and mass transport technical field.
The suction-type sand-blasting gun is to adopt the venturi-type eductors principle, utilizes the high-speed gas jet generation underbalance effect of air nozzle ejection that the sand material is drawn in the sand-blasting gun (injector) by sand suction pipe, forms sandblast acting jet by blast nozzle again.The geometry of air nozzle and blast nozzle and relative position have a direct impact pneumatic course of injection.Though the inside and outside shape of existing suction-type sand-blasting gun is different, all is made up of four essential parts such as air nozzle, blast nozzle, sand suction pipe and the sealing body of a guies.
The air nozzle that the suction-type sand-blasting gun of prior art is adopted has two kinds of forms substantially, and a kind of is the center single hole air nozzle form of using always, and another kind is the circumferential weld air nozzle form that coaxial suction-type sand-blasting gun is adopted.The sand-blasting gun that adopts above two kinds of air nozzles in actual use still performance weak point is arranged.
The gas jet of center single hole air nozzle ejection is subjected to the influence of blast nozzle physical dimension very big through blast nozzle the time.Though can obtain higher sand grains flying speed, be subjected to the be jammed restriction of effect of aerodynamics what is called, the sandblast amount is very little, causes this kind sand-blasting gun sandblast efficient not high.
The jet of circumferential weld air nozzle ejection has the property of converging and closure, has alleviated the effect of being jammed, and makes to adopt the sand-blasting gun of circumferential weld air nozzle can obtain high negative and bigger sand production rate.But circumferential weld jet energy is concentrated not as the circular hole jet, makes the sandblast effluxvelocity decrease and also causes sandblast limited efficiency system.
Purpose of the present invention is exactly the advantage that keeps center single hole air nozzle and circumferential weld air nozzle by the improved porous convergence air nozzle of geometry, overcomes their deficiency simultaneously.Thereby seek further to improve the sandblast efficient of suction-type sand-blasting gun.
The object of the present invention is achieved like this: the relative symmetrical center line of a plurality of fumaroles evenly distributes axisymmetricly, the dead in line of this symmetrical center line and blast nozzle.Axis and the symmetrical center line of the outer fumarole of axle form and converge the angle for a short time, and the too little meeting of this angle causes blast nozzle and whole sand-blasting gun long excessive, influences use; Angle is crossed senior general and is caused sandblast speed obviously to descend, thus converge the angle should design be controlled at 2 the degree and 8 the degree between.The convergent point of fumarole axis should be positioned at after the mid point of blast nozzle larynx footpath and blast nozzle outlet a certain position before, and when convergent point was positioned at this interval, sandblast amount and sandblast speed can reach higher level, exceeds this interval obviously reduction sandblast efficient.Under the prerequisite that keeps how much integralities of each fumarole and mechanical strength, the spacing between the fumarole should be dwindled as far as possible, shortens spacing and helps improving the sandblast effluxvelocity.When gases at high pressure during by this porous air nozzle that converges design, the multiply jet of formation converges in blast nozzle inside, forms single plying jet again.This multiply that forms in sand-blasting gun inside by the porous convergence air nozzle converges jet and has improved sandblast mechanism from following several respects:
1) per share jet has still kept the advantage of circular hole jet concentration of energy.
2) the multiply jet increased with by the contact interface of injection air-flow, the boundary interface area is a uiform section single hole air nozzle
Doubly, (n is a fumarole quantity)
3) the multiply jet converges in after the blast nozzle throat mid point, has effectively alleviated the be jammed effect of single hole jet through blast nozzle the time, helps improving sand production rate.
4) the multiply jet converges design, makes blast nozzle larynx footpath size is no longer when adopting single hole air nozzle and ring-type air nozzle responsive.When blast nozzle larynx footpath size changed in a big way, suction sand negative pressure parameter was relative little with the intensity of variation of sandblast amount and sandblast speed.Help reducing the design difficulty of blast nozzle and improving the blast nozzle life-span.
5) the multiply jet converges the transmission that design helps energy, and is favourable to improving sandblast speed.
Concrete structure of the present invention is provided by following embodiment and accompanying drawing thereof.
Accompanying drawing 1 is to adopt seven apertures in the human head of the present invention to converge the structure principle chart of the suction-type sand-blasting gun of air nozzle.
Behind the gases at high pressure process porous convergence air nozzles of the present invention (1), form, converge angle (5) and should spend between 8 degree 2 so that certain is the multiply jet of convergent point a bit after the mid point of blast nozzle (2) larynx footpath.Under jet Venturi effect effect, inner and the very strong negative pressure (vacuum) of the inner generation of sand suction pipe of the sealing body of a gun (3), sand material and Air mixing stream are sucked into sand-blasting gun inside continually and send into blast nozzle along sand suction pipe, main jet gas jet and carried out the exchange (physical mixed reaction) of matter and energy in blast nozzle inside by the sand gas mixed flow of injection, the expansion segment in back, larynx footpath further quicken the back and form at a high speed sandblast acting jet.
Claims (3)
1. porous convergence air nozzle that is used for the suction-type sand-blasting gun is characterized in that air nozzle is made up of a plurality of fumaroles that distribute axisymmetricly, and symmetrical center line and all fumarole axis converge and intersect at a point.
2. porous convergence air nozzle according to claim 1, it is characterized in that the axis of each fumarole and symmetrical center line converge the angle determine to defer to such principle, convergent point should be positioned at after the isometrical trunnion mid point of blast nozzle and blast nozzle outlet interval before within.
3. porous convergence air nozzle according to claim 1, what it is characterized in that the fumarole axis converges angle (5) greater than 2 degree, less than 8 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101834575A CN101428261A (en) | 2008-12-17 | 2008-12-17 | Stephanoporate gather air cap for inhalation type sand-blasting gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101834575A CN101428261A (en) | 2008-12-17 | 2008-12-17 | Stephanoporate gather air cap for inhalation type sand-blasting gun |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101428261A true CN101428261A (en) | 2009-05-13 |
Family
ID=40644023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101834575A Pending CN101428261A (en) | 2008-12-17 | 2008-12-17 | Stephanoporate gather air cap for inhalation type sand-blasting gun |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101428261A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105927421A (en) * | 2016-04-15 | 2016-09-07 | 韦翔 | Venturi jet engine |
| CN110208149A (en) * | 2019-04-28 | 2019-09-06 | 南京航空航天大学 | The accurate controllable sand grains delivery device in a kind of sand grains speed and direction |
-
2008
- 2008-12-17 CN CNA2008101834575A patent/CN101428261A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105927421A (en) * | 2016-04-15 | 2016-09-07 | 韦翔 | Venturi jet engine |
| CN110208149A (en) * | 2019-04-28 | 2019-09-06 | 南京航空航天大学 | The accurate controllable sand grains delivery device in a kind of sand grains speed and direction |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090513 |