CN2054381U - Fast-speed non-dust automatic screening device - Google Patents

Abstract

The utility model discloses a fast-speed non-dust automatic screening device, composing of three parts, and namely, a screen body, a separator and a dust collector. The screen body is provided with a switch, a negative pressure vacuum meter and a mechanical timer; the middle is provided with a variable-speed electric motor, a main shaft, a revolving body, a screen mesh and a screen cover; the bottom part of the screen body is provided with an inhale pipeline which is connected with the separator; the pipeline is connected with the dust collector at the outlet point of the separator; the upper part of the dust collector is provided with a vacuum pump, and the lower part of the dust collector is the two layers of non-woven fabric as the shielded dust collection induced draft machine. The utility model has the advantages of simple structure, high efficiency, no noise, no dust, accurate test and comparatively ideal cement test.

Description

Fast-speed non-dust automatic screening device

The utility model belongs to screening and the device that uses the air-flow method that pressed powder is separated.

What be widely used at present is German a kind of air jet sieve, it is made up of four parts substantially, the one, the air jet sieve main body, the 2nd, separator, the 3rd, filter, the 4th, the civilian dust catcher of air-breathing usefulness, the air jet sieve main part is by motor, press certain rotational speed by the worm type of reduction gearing drive shaft, unidirectional nozzle is housed on the main shaft top does the planar circumferential rotation with speed with main shaft, near the sieve that the certain particle size aperture is housed above the nozzle, with the sieve nest sealing, below sieve, upwards form air-flow around it by nozzle, suction-operated by dust catcher on sieve forms negative pressure, thereby the tested powder sample that sieve is placed with is above constantly blown by the air-flow that nozzle sprays, and the final powder particle is siphoned away below sieve by dust catcher in the sieve aperture, and most of sample sinks in the chassis below the next stage separator, because the pore size of sieve net is certain, surpassing the aperture size sample just is residue, how much comes weighing by residue, as the demarcation of tested powder sample granule size.This device afterbody is a filter, its structure is an independent multilayer sleeve, the inner looped fabric that adopts is with the folding form of sleeve, fallen in the separator by the powder overwhelming majority that dust catcher siphons away, still surplus sub-fraction is drawn onto in the filter, whole device connects together and could work, and this device has following deficiency: structure is messy, numerous and diverse, efficient is low, equipment is outmoded, still use old-fashioned dust catcher absorption powder specimen, and floor space is big, install and use inconvenience.

For solving above deficiency, the utility model provides a kind of new version, adopts quick dustless Automatic sieve, and negative pressure of vacuum separator and dust-precipitator three parts are formed, with reach at a high speed, dustless, device structure is simple, purpose easy to install.

Design of the present utility model is the new design that proposes on the basis of reference air jet sieve, mechanical timer is equipped with in front at sieve nest, negative-pressure vacuum table and power on switch, drive motors adopts the direct change motor, be vertically mounted on the centre of sieve nest, rotating shaft by the vertical major of driven by motor and motor connects together, main shaft and rotary body directly are fixedly connected, rotary body is a two-way nozzle, the centre is a strip upward opening, main shaft is fixed on the center of rotary body just, rotary body is cast with copper material, screen cloth and screen cloth outer radius variable near the rotary body upper fixed, the screen cloth top is the sieve lid, screen cloth and sieve nest are with the assembling of lining form and keep sealing, the external diameter size depends on the needs, the negative pressure probe is housed in sieve nest to be connected with the negative-pressure vacuum gauge outfit, on gauge outfit, can directly read negative-pressure vacuum value below the screen cloth, negative pressure in this device, can regulate control by the Air-regulating valves on the dust-precipitator suction hole, the reading of vacuum meter should be controlled in 2000～6000Pa scope when normal screening was tested, its negative pressure of bleeding of powder that commute is pulverized should be controlled lowlyer, bottom at sieve nest joins with rubber pipeline and separator, absorbed powder sinks in the chassis of separator below through pipeline, separator joins with pipeline and dust-precipitator again, and for dustproof, whole pipelines of tired this connection carry out strict sealing; Vavuum pump vertically is housed in dust-precipitator, being equipped with below vavuum pump with the two-layer nonwoven is the filter that screen is kept away, these two parts are contained in respectively in separately the housing, divide two body structures up and down, the centre connects with snap close, be convenient to roll over drive and get rid of the residual powder that absorbs, there are air inlet and separator to join in dust-precipitator one side with pipeline, air inlet has the adjusting intake valve, size with the control air quantity, another pipeline is the gas outlet, because the air-breathing operation of vavuum pump forms negative pressure of vacuum by the air-breathing screen cloth below of sieve nest that makes of pipeline, air inlet below the negative pressure of vacuum probe constantly replenishes the opening part ejection of air above rotary body simultaneously, causes the powder sample above the screen cloth constantly to be blown afloat and constantly be sucked away.

Its course of work: with specimen on request quantity pour in the sieve of desired particle size, cover sieve lid, by required screening time opening timing switch, bring into operation, behind the left alone without help machine, the residual powder in the screen cloth is collected and weighing, can be weighed up the percentage of the shared gross sample amount of residue then.

The utility model and existing air-flow sieve ratio have following advantage: simple in structure, speed is fast, efficient is high, noise is little, no dust, easy to install.

The accompanying drawings embodiment:

Fig. 1 is quick dustless automatic sieving unit sieve nest structure chart;

Fig. 2 is quick dustless automatic sieving unit cyclone separator arrangement figure;

Fig. 3 is quick dustless automatic sieving unit dust-precipitator structure chart;

Fig. 4 is a rotary body profile on the quick dustless automatic sieving unit sieve nest;

Fig. 5 is a rotary body front view on the quick dustless automatic sieving unit sieve nest.

Know by Fig. 7,9 is the sieve nest of quick dustless automatic sieving unit, 1 is that the sieve lid is made with transparent material with observation sample, closely cooperate with sieve nest, 2 is screen cloth, 3 is rotary body, 4 is main shaft, 10 is the direct change motor, directly be connected with main shaft 4,5 is power switch, 6 is the vacuum pressure gauge outfit, 7 is timer, 8 is vacuum probe, can read the negative-pressure vacuum value by gauge outfit 6,11 are the air draught pipeline, and input port 14 direct and separator (Fig. 2) 12 joins, and 13 is the chassis of separator 12, the separated powder of splendid attire is used, 15 is delivery outlet, represents with C, and input port 23 direct and dust-precipitator (Fig. 3) joins, the top of dust-precipitator 18 is vavuum pump 19,20 screens of making for two-layer nonwoven are kept away with filtering powder and are used, 21 is the snap close of dust-precipitator two bodies about in the of 18, is convenient to dismounting, Fig. 4,17 is the profile of sieve nest rotary body 3,6 of Fig. 5 is a front view, and the centre is a strip opening, and air sprays from opening part, blow to the bottom of screen cloth 2, make that the powder sample in the screen cloth 2 is constantly blown afloat, again sample siphoned away by the bottom of dust-precipitator from screen cloth 2 by sieve aperture at last to have only particle just staying on the screen cloth greater than screen cloth 2 apertures, calculate the percentage of the shared total amount of residue at last, this automatic sieving unit is a kind of instrument of comparatively hypothesis testing cement.

The advantage of present embodiment: simple in structure, efficient is high, dustless, test accurately.

Claims (4)

1, a kind of quick dustless automatic sieving unit, it is made up of air-flow sieve, separator, filter and dust catcher, of the present utility model be characterised in that it be by:

1) power switch 5 is housed at an upper portion thereof, the negative-pressure vacuum gauge outfit 6 that connects vacuum probe 8, mechanical timer 7, central vertical is equipped with variable speed electric motors, particularly 10, the rotary body 3 that main shaft 4 and main shaft join covers 1 and the sieve nest 9 of bottom suction line 11 near the screen cloth 2 on rotary body 3 tops, sieve;

2) separator 12 that joins with pipeline B and sieve nest 9;

3) vavuum pump 10 is arranged at an upper portion thereof, two-layer nonwoven 20 is equipped with in the bottom, and is middle with snap close 21 connections, the dust-precipitator 18 that input port 23 is connected with separator 12 with pipeline C

Form.

2, by the described quick dustless automatic sieving unit of claim 1, it is characterized in that described rotary body 3 is two-way nozzle, the centre is a strip upward opening.

3, by the described quick dustless automatic sieving unit of claim 1, it is characterized in that the outer radius variable of described screen cloth 2, screen cloth 2 seals with assembling of lining form and maintenance with sieve nest 9.

4,, it is characterized in that described rotary body 3 casts for copper material by claim 1,2 described quick dustless automatic sieving units.

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