CN2124763U - O shape circulation pipe air flow crasher - Google Patents

Abstract

The utility model provides an O-shaped circulation pipe type air flow crusher for the superfine crushing of solid materials, comprising a vertical O-shaped circulating pipeline composed of a lowering pipe, a lifting pipe, a crushing cavity and a classifying cavity, wherein, the bottom of the crushing cavity is provided with a spray nozzle, the lowering pipe is provided with a feed port, a loop outlet is arranged at the inner side of the tail end of the classifying cavity, a spiral case-shaped classifying cavity chamber is connected with the O-shaped loop outlet via a channel, a product outlet is arranged on the end face of the spiral case, and a return channel arranged below the spiral case is connected with the lowering pipe. With the utility model, superfine products can be obtained.

Description

O shape circulation pipe air flow crasher

What the present invention relates to is pulverizer, particularly O type circulation tubular type airslide disintegrating mill.

O type circulation tubular type airslide disintegrating mill is applicable to the ultramicro grinding of solid material, and the 0808-BTT type O type circulation tubular type airslide disintegrating mill of Hunan insecticide factory import U.S. stream energy company is arranged in the prior art.Its shank is by down-comer, tedge, the vertical O type circulating line that crushing chamber and classification chamber constitute, for preventing the wearing and tearing of equipment inwall in crushing process, thereby adopt spraying or built-up welding tungsten carbide, tungsten cochrome or casting wear resistant cast iron liner plate as liner.Subsonic nozzle is equipped with in the crushing chamber bottom, adopts compressed air to make working medium.Down-comer is provided with charging aperture, and charging aperture links to each other with charging system, and this charging system is made up of injector, charging hopper, Venturi tube and mixing chamber.This O type circulation tubular type airslide disintegrating mill adopts scalping, and the circuit outlet is terminal inboard in the classification chamber.

Its operation principle is as follows: when compressed air produces high-speed jet by the injector in the charging system, in mixing chamber, produce negative pressure, the material that desire is pulverized is injected crushing chamber from the charging hopper suction and with high-speed jet through Venturi tube, crushing chamber is below O type pipeline, a plurality of nozzles are equipped with in the crushing chamber bottom, the high-speed jet that is produced acts on the processed material, make storeroom produce fierce bump, thereby friction is pulverized, pulverized material enters the classification chamber of O type pipeline top along tedge with air-flow, under the effect of centrifugal force and inertia force, corase particles returns crushing chamber along O type circuit down-comer to be continued to be pulverized, and fine particle goes out pulverizer with air-flow and collects as product.

Existing O type circulation tubular type airslide disintegrating mill has following weak point: 1, owing to be subjected to structural limitations, the sectional area of O type circuit is bigger, the air motion speed V in classification chamber is lower so flow through in pipeline, in addition because the classification radius r at position, pipeline classification chamber is also longer, so according to centrifugal force formula F=(mv ²)/(r), centrifugal force F is big inadequately, thereby classifying capability is relatively poor.2, because this equipment is connected with flange by multistage curvature pipeline, just bring problems, as aspect the processing and manufacturing, its casting, welding, metalworking assembling are connected etc. and all have high requirements, and make its manufacture difficulty bigger; Powder is in crushing process in addition, because material properties difference, phenomenons such as the bonding of generation O shape circuit inwall, wearing and tearing, spray nozzle clogging, influence crushing effect, therefore need often to observe, clean O shape pipeline, but this version makes the disassemble and assemble work complexity, and the cleaning after the dismounting is also inconvenient, moreover owing to adopt multistage curvature pipeline configuration, make liner process, assemble, repair very difficult, therefore existing equipment can only adopt spraying, overlaying method, large scale computer employing wear resistant cast iron liner plate, and can't adopt hardness height, engineering ceramics that wearability is good to make liner.Make liner with metal material and easily make pulverized material be subjected to the pollution of metal ion, influenced the quality of product, because Wear Resistance of Metal Materials is poor, make the service life of liner shorter in addition.3, the flow velocity size that nozzle produced is the key of air-flow smashing capability, owing to adopt subsonic nozzle, thereby grindability is big inadequately.

The purpose of this utility model is to provide a kind of O type circulation tubular type airslide disintegrating mill with high classifying capability, to obtain ultramicrofine product.

The utility model is to realize like this, it comprises one by down-comer, tedge, the vertical O type circulating line that crushing chamber and classification chamber constitute, nozzle is equipped with in the crushing chamber bottom, the down-comer end is provided with charging aperture, the circuit outlet is terminal inboard in the classification chamber, one scroll casing shape classification chamber is linked to each other with the outlet of O type circuit by passage, products export is at the spiral case end face, the spiral case below expects that once passage links to each other with down-comer, design the version of this secondary internal classification, be to enter with circuit air motion direction the incomplete classification gas-solid flow that flow out in internal classification chamber in the prior art angled (greater than 90 °, less than 150 °, about 130 ° of many employings) passage, enter secondary classification chamber, passage is the cross section that has dwindled, in order to improve the flow velocity that air-flow enters secondary classification chamber, secondary classification chamber is a scroll casing shape, its radius of curvature is littler than scalping chamber radius, thereby the centrifugal force of solids in secondary classification chamber increases, can be with the classification once more of the micro mist after the scalping, to separate than corase particles, and return crushing chamber through the feed back passage and continue to pulverize.In order to understand secondary classification situation, on cover, visor can be installed, so that in crushing process, observe the situation of secondary feed back at any time, grasp grading effect.

O type circulating line of the present utility model cross section is circle, rectangle, trapezoidal etc., circulating line has vertical interface, O type circulating line is divided into cover and body two parts, cover is connected with hinge with body, thereby can be very convenient with apparatus lid opening, not only assemble, cleaning, easy to maintenance, and make the simplification of liner process technology, spraying, built-up welding tungsten carbide, carbide alloy abrasionproof liner easy, and can adopt the hardness height, the engineering ceramics that anti-wear performance is good is made liner, has improved the service life of product quality and equipment.Because the utility model has avoided in original technology O type circulating line by multistage curvature pipeline flange type of attachment, and adopt the continuous circuit in plane of integral cast, manufacturing easily, the cycle is short, cost is low.

The utility model nozzle is Lavalle (Laval) type superonic flow nozzzle, and the jet velocity height is according to kinetic energy formula F=1/2 mv ², can find out size reduction energy and velocity squared direct ratio, Laval nozzle can obtain the velocity of sound of several times, so that grindability has bigger raising than subsonic nozzle, thereby improved the fineness and the production capacity of product.

O type circuit liner of the present utility model can adopt the engineering ceramics of high rigidity, high-wearing feature, as aluminium oxide, silicon nitride, carborundum etc., has overcome the disadvantage that metal inner lining can pollute powder.

Charging system of the present utility model and prior art do not exist together, be to replace charging hopper with reinforced flexible pipe, be that mixing chamber connects a reinforced flexible pipe, when compressed air produces high-speed jet by injector, form negative pressure in the mixing chamber, the desire comminuting matter that charging (feeding) equipment (automatic ration feeder) is come out is sucked by reinforced flexible pipe, enters crushing chamber with high-speed jet through Venturi tube.Replace charging hopper with reinforced flexible pipe, can make the charging (feeding) equipment needn't be such, must be fixed on the charging hopper top, and not be subjected to the limitation of position and height, can arbitrarily place and move by original technology.

But the utility model O type circulating line body frame makes whole equipment move freely on a support that wheel is housed like this, brings convenience to aspects.

The utility model compared with prior art, the advantage that has is: simple in structure, liner and processing and manufacturing are easy, be convenient to cleaning and maintenance, cost is low, and pulverized material is vulnerable to pollution not, this equipment grindability is big, classifying capability is strong, adopts the utility model, can obtain high-purity, ultramicrofine product.As about its average grain diameter of the former powder of pesticide carbendazim 44 μ m, after employing the utility model was pulverized, the product average grain diameter was at 0.37～0.42 μ m.

Description of drawings is as follows:

Fig. 1 is a shank structural representation of the present utility model

Fig. 2 is the cutaway view of whole equipment

Number in the figure is: 1-nozzle, 2-crushing chamber, 3-liner, 4-tedge, the 5-support, 6-hinge, 7-cover, 8-body, 9-scroll casing shape classification chamber, 10-products export, 11-classification chamber, 12-passage, the outlet of 13-circuit, 24-feed back passage, 15-down-comer, 16-injector, the 17-flexible pipe that feeds in raw material, the 18-mixing chamber, the 19-Venturi tube, 20-charging aperture, 21-visor.

Embodiment

Referring to Fig. 1, Fig. 2.It comprises the vertical O type circulating line that is made of down-comer 15, tedge 4, crushing chamber 2 and classification chamber 11, Lavalle type nozzle 1 is equipped with in crushing chamber 2 bottoms, down-comer 15 ends are provided with charging aperture 20, circuit outlet 13 is 11 terminal inboard in the classification chamber, one scroll casing shape classification chamber 9 links to each other with circuit outlet 13 by passage 12, products export 10 is at the spiral case end face, and the spiral case below expects that once passage 14 links to each other with down-comer 15.O type circulating line has vertical interface, and O type circulating line is divided into cover 7 and 8 liang of parts of body, and cover 7 is connected with body 8 usefulness hinges 6.Wall liner aluminium oxide engineering ceramics in the O type circuit.Charging system comprises injector 16, mixing chamber 18, Venturi tube 19 and reinforced flexible pipe 17.Venturi tube 19 1 ends link to each other with charging aperture 20, the other end links to each other with mixing chamber 18, mixing chamber 18 also connects a reinforced flexible pipe 17, the material that desire is pulverized comes out to suck mixing chamber 18 by reinforced flexible pipe 17 from charging (feeding) equipment, the high-speed jet that compressed air is produced by injector 16 not only makes mixing chamber 18 form negative pressure, also make the material that is inhaled into inject the crushing chamber 2 of O shape circuit from charging aperture 20 through Venturi tube 19, the high-speed jet that the Laval nozzle 1 of compressed air by crushing chamber 2 bottoms produced acts on the material, make storeroom produce fierce collision and friction, reach the purpose of pulverizing, the material of being pulverized enters classification chamber 11 with gas along tedge 4, under centrifugal force and inertia force effect, corase particles enters down-comer 15 and returns crushing chamber 2 continuation pulverizing outside 11 ends along the classification chamber, fine particle is with air-flow 11 terminal inboard circuit outlets 13 from the classification chamber, and enter scroll casing shape classification chamber 9 and carry out the classification second time through passage 12, returned crushing chamber 2 than corase particles from feed back passage 14 and continue to pulverize by what powerful centrifugal force was separated, last fine particle goes out pulverizer from the products export 10 of spiral case end face and enters trapping system.Cover 7 is provided with visor 21, so that observe the feed back situation.Because the effect of hinge 6 can be opened cover 7 very easily, and the outlet of whole O type circuit and nozzle 1 is come out entirely, be convenient to cleaning and observation.The pulverizing body of O type circulating line is contained on the support 5 that wheel arranged, and makes whole equipment move flexible.

Claims (6)

1, a kind of O type circulation tubular type airslide disintegrating mill that is used for the comminuted solids material, comprise one by down-comer 15, tedge 4, the vertical O type circulating line that crushing chamber 2 and classification chamber 11 constitute, nozzle 1 is equipped with in crushing chamber 2 bottoms, down-comer 15 is provided with charging aperture 20, circuit outlet 13 is 11 terminal inboard in the classification chamber, it is characterized in that having a scroll casing shape classification chamber 9 to link to each other with circuit outlet 13 by passage 12, products export 10 is at the spiral case end face, and the spiral case below expects that once passage 14 links to each other with down-comer 15.

2, O type circulation tubular type airslide disintegrating mill according to claim 1 is characterized in that O type circulating line has vertical interface, and O type circulating line is divided into cover 7 and body 8 two parts, and cover 7 is connected with body 8 usefulness hinges 6.

3, O type circulation tubular type airslide disintegrating mill according to claim 1 is characterized in that nozzle 1 is a Lavalle type nozzle.

4, O type circulation tubular type airslide disintegrating mill according to claim 1 and 2 is characterized in that O type circulating line inwall is provided with liner 3, and inner lining material adopts engineering ceramics.

5, O type circulation tubular type airslide disintegrating mill according to claim 1 is characterized in that charging aperture 20 is connected a reinforced flexible pipe 17 by Venturi tube 19 with mixing chamber 18.

6,, it is characterized in that 8 of O type circulating line bodies are on a support 5 that wheel arranged according to claim 1,2 or 3 described O type circulation tubular type airslide disintegrating mills.

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