CN201120333Y

CN201120333Y - Airflow spray gun

Info

Publication number: CN201120333Y
Application number: CNU2007200447171U
Authority: CN
Inventors: 陈林书
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-10-25
Filing date: 2007-10-25
Publication date: 2008-09-24
Anticipated expiration: 2017-10-25

Abstract

The utility model discloses an air spray gun in the field of atomization devices, wherein, a jacket, an intermediate body and a gun core are concentrically arranged and are connected on one end of a gun base through screw thread; a lug boss matched with the jacket is arranged in the middle of the intermediate body; a plurality of rotating air slots are arranged on the external circumferential surface of the lug boss; a contracting outer layer air channel is arranged between the jacket and the intermediate body and at one side of the lug boss; a liquid flow channel is formed by the space between the intermediate body and the gun core; the center of the gun core is provided with a central air channel; the central air channel at the outlet end of the gun core forms a Venturi tube-like hole; the large-diameter section as a conical surface on the inner side of the liquid flow channel is smoothly transited to the small-diameter section at the outlet; the external circle surface of the outlet end of the gun core is obliquely extended outward as a conical surface on the front end of the liquid flow channel. During working, the liquid flow channel ejects material liquid which can be well atomized when meeting the air ejected by the outer layer air channel and the central air channel; moreover, the air spray gun of the utility model has the advantages of simple structure, high energy utilization rate of compressed air, high volume in liquid atomization and not easy adhesion at the outlet and can be used in fluidized bed granulation.

Description

The air-flowing type spray gun

Technical field

The utility model relates to a kind of air-blast atomization device, belongs to the fluidized bed prilling technical field.

Background technology

At present, atomize in the fluid bed inside air-flowing type spray gun of feed liquid of use, its structure mainly contains two streamings or three streamings, three streaming spray guns wherein, it mainly includes gun platform, the gun platform threaded one end is connected with overcoat, intermediate and rifle core, overcoat, intermediate and rifle core ecto-entad are provided with one heart, the intermediate middle part is provided with the boss that matches with overcoat, the outer circumference surface of boss is provided with some rotation air drains, between overcoat and the intermediate and to be positioned at boss one side be an outer gas flow passage that shrinks gradually, gap between intermediate and the rifle core forms fluid course, rifle core center is provided with the central gas stream passage, and the outer gas flow passage has tapering, the central gas stream passage is a straight hole, fluid course is straight-through; Gun platform is provided with the outer airflow hole of a circle, and the airflow hole inboard is provided with a circle liquid flow hole outside, and the gun platform center also is provided with centre bore, and outer airflow hole is connected through rotation air drain and outer gas flow passage, and liquid flow hole and fluid course are connected, and centre bore and central gas stream passage are connected; The way of offering passage introducing air-flow and liquid stream from the gun platform side is also arranged.During its work, outer gas flow passage and the air inlet of central gas stream passage, fluid course feed liquor, the outer gas flow passage mainly plays buffer action, the central gas stream passage mainly hazes and turns usefulness into, spray jointly when leaving respective channel (promptly at the port of export) by air-flow and liquid stream, make the atomizing of liquid stream, in fluid bed, spray to particle surface, make that the solid particle in the fluid bed increases gradually.Its weak point is: less because of the fluid course diameter when spraying work, make that the atomizing wet length is smaller, and atomization quantity is generally less than normal, and normal atomization quantity list props up rifle and has only 50 kilograms/hour at most; Easily produce liquidus during atomizing, the easy bridging in exit at air-flow and liquid stream results in blockage, and influences dependability.

The utility model content

The purpose of this utility model is to propose a kind of air-flowing type spray gun, and this spray gun can improve the atomization quantity at the fluid bed internal spraying, and makes shower nozzle export not bridging, does not stop up shower nozzle.

The purpose of this utility model is achieved in that the air-flowing type spray gun, comprise gun platform, the gun platform threaded one end is connected with overcoat, intermediate and rifle core, overcoat, intermediate and rifle core ecto-entad are provided with one heart, the intermediate middle part is provided with the boss that matches with overcoat, the outer circumference surface of boss is provided with some rotation air drains, between overcoat and the intermediate and to be positioned at boss one side be an outer gas flow passage that shrinks gradually, gap between intermediate and the rifle core forms fluid course, rifle core center is provided with the central gas stream passage, gun platform is provided with the outer airflow hole of a circle, the airflow hole inboard is provided with a circle liquid flow hole outside, and the gun platform center also is provided with centre bore, and outer airflow hole is connected through rotation air drain and outer gas flow passage, liquid flow hole and fluid course are connected, and centre bore and central gas stream passage are connected; The central gas stream passage of the rifle core port of export becomes the venturi [, and fluid course is the path section that the conical surface is smoothly transitted into the exit by the big footpath section of inboard, and the outer round surface of the rifle core port of export is the outward-dipping extension of the conical surface at the outlet front end of fluid course.

During the utility model work, outer gas flow passage and the air inlet of central gas stream passage, the fluid course feeding liquid, the outer gas flow passage can feed the gas of high pressure, it mainly plays atomizing and buffer action, the central gas stream passage can feed the identical or different gas of pressure, it is spuming liquid film and the effect of regulating mist awl hollowness mainly, when feed liquid is outwards sprayed from its outlet, be under the guide effect of rifle core outer round surface of the outward-dipping extension of the conical surface at its outlet front end, the trend that outside scattering is arranged, air-flow through the outer gas flow passage of rotation behind the air drain forms eddy flow, run into liquid stream after, spray together after ordering about the feed liquid atomizing; Outer gas flow is rotation status, and easier atomizing feed liquid plays cleaning action on the other hand on the one hand, makes the exit be difficult for adhesion; The interference of internal layer gas and the effect of foamed liquid film make atomizing simpler, regulate internal layer gas pressure and amount, can regulate the hollow degree of mist awl.The utility model can make the atomizing wet length be improved, thereby makes the feed liquid thickness before the atomizing can remain on minimum thickness, runs into to be easier to atomizing behind the swirling eddy.Compared with prior art, the utility model is simple in structure, and compressed-air actuated capacity usage ratio is improved, same air supply, and the atomizing reduction of feed volume improves, and outlet is difficult for adhesion.Can be used for fluidized bed prilling.

Description of drawings

Fig. 1 is the utility model structural representation.

Fig. 2 is the intermediate structure schematic diagram.

Fig. 3 is that the A-A of Fig. 1 is to view.

Fig. 4 is that the B-B of Fig. 1 is to view.

Fig. 5 is the partial enlarged drawing of C among Fig. 1.

Wherein, 1 overcoat, 2 intermediates, 201 rotation air drains, 202 boss, 3 gun platforms, 301 outer airflow holes, 302 liquid flow holes, 4 rifle cores, 401 central gas stream passages, 402 horn mouths, the outer round surface of the 403 rifle core ports of export, 5 fluid courses, 6 outer gas flow passages.

The specific embodiment

As figure, be the air-flowing type spray gun, comprise gun platform 3, gun platform 3 threaded one ends are connected with overcoat 1, intermediate 2 and rifle core 4, overcoat 1, intermediate 2 and rifle core 4 ecto-entads are provided with one heart, intermediate 2 middle parts are provided with the boss 202 that matches with overcoat 1, the outer circumference surface of boss 202 is provided with some rotation air drains 201, between overcoat 1 and the intermediate 2 and to be positioned at boss 202 1 sides be an outer gas flow passage 6 that shrinks gradually, gap between intermediate 2 and the rifle core 4 forms fluid course 5, rifle core 4 centers are provided with central gas stream passage 401, and gun platform 3 is provided with the outer airflow hole 301 of a circle, and airflow hole 301 inboards are provided with a circle liquid flow hole 302 outside, gun platform 3 centers also are provided with centre bore, outer airflow hole 301 is connected through rotation air drain 201 and outer gas flow passage 6, and liquid flow hole 302 is connected with fluid course 5, and centre bore and central gas stream passage 401 are connected; To the aditus laryngis of diameter less than the central gas stream passage, the horn mouth 402 that carries out the transition to the exit again forms by the conical surface transition that is connected with central gas stream passage 401 for 401 one-tenth venturi [es of the central gas stream passage of rifle core 4 ports of export, this venturi [; Fluid course 5 is the path section that the conical surface is smoothly transitted into the exit by the big footpath section of inboard, and the outer round surface 403 of the rifle core port of export is the outward-dipping extension of the conical surface at the outlet front end of fluid course 5.

During the utility model work, outer

gas flow passage

6 and 401 air inlets of central gas stream passage, fluid course 5 feeding liquids, outer gas flow passage 6 can feed the gas of high pressure, it mainly hazes and turns usefulness into, central gas stream passage 401 can feed the relatively low gas of pressure, it is spuming liquid film and the effect of regulating mist awl hollowness mainly, the tolerance of outer gas flow passage accounts for the 60-95% of total atomizing tolerance, the tolerance of central gas stream passage accounts for the 5-40% of total atomizing tolerance, and air feed air pressure is at 0.1-0.6Mpa; When feed liquid is outwards sprayed from its outlet, be under the guide effect of rifle core 4 outer round surface of the outward-dipping extension of the conical surface at its outlet front end, the trend of outside scattering is arranged, the air-flow of the outer gas flow passage 6 behind rotation air drain 201 forms eddy flow, after running into liquid stream, order about and spray together after feed liquid atomizes; Outer gas flow is rotation status, and easier atomizing feed liquid plays cleaning action on the other hand on the one hand, makes the exit be difficult for adhesion; The interference of internal layer gas and the effect of foamed liquid film make atomizing simpler, regulate internal layer gas pressure and amount, can regulate the hollow degree of mist awl.The utility model can make the atomizing wet length be improved, thereby makes the feed liquid thickness before the atomizing can remain on minimum thickness, runs into to be easier to atomizing behind the swirling eddy, regulates the hollow degree that the internal layer air-flow can be regulated the mist awl.

During atomizing low viscosity feed liquid, the central gas stream passage can obstructed compressed air.

Claims

1, the air-flowing type spray gun, comprise gun platform, the gun platform threaded one end is connected with overcoat, intermediate and rifle core, overcoat, intermediate and rifle core ecto-entad are provided with one heart, the intermediate middle part is provided with the boss that matches with overcoat, the outer circumference surface of boss is provided with some rotation air drains, between overcoat and the intermediate and to be positioned at boss one side be an outer gas flow passage that shrinks gradually, gap between intermediate and the rifle core forms fluid course, rifle core center is provided with the central gas stream passage, gun platform is provided with the outer airflow hole of a circle, the airflow hole inboard is provided with a circle liquid flow hole outside, and the gun platform center also is provided with centre bore, and outer airflow hole is connected through rotation air drain and outer gas flow passage, liquid flow hole and fluid course are connected, and centre bore and central gas stream passage are connected; It is characterized in that: the central gas stream passage of the rifle core port of export becomes the venturi [, fluid course is the path section that the conical surface is smoothly transitted into the exit by the big footpath section of inboard, and the outer round surface of the rifle core port of export is the outward-dipping extension of the conical surface at the front end of fluid course.