CN203525896U - Dust collector of pneumatic grain unloader - Google Patents

Abstract

The utility model discloses a dust collector of a pneumatic grain unloader. The dust collector comprises a dust collector tube, wherein a dust collector cover for sealing the dust collector tube is arranged at the top part of the dust collector tube, a material outlet is formed at the bottom of the dust collector tube, a material inlet is arranged on the side wall of the dust collector tube, a filter is arranged inside the dust collector tube, a pulse gas pipe and an air outlet are arranged above the filter, the bottom of the dust collector tube is in a flat bottom structure, a scraping mechanism is arranged at the side of the material outlet, the scraping mechanism comprises a scraping impeller and a power unit for driving the scraping impeller to rotate, and the scraping impeller comprises an impeller shaft and a blade arranged on the impeller shaft. The height of the dust collector tube is greatly reduced, the miniaturization design of the dust collector can be realized, and the dust collector of the pneumatic grain unloader meets the requirement of warehousing operation of the movable pneumatic grain unloader.

Description

A kind of deduster of grain absorber

Technical field

The utility model relates to grain absorber technical field, especially, relates to a kind of deduster of grain absorber.

Background technology

Now, the grain depot of various places, grain processing enterprise and circulation industry adopt the form of horizontal warehouse to carry out accumulating to grain in a large number; Adopt horizontal warehouse to have huge advantage in the storage of grain and on guaranteeing the quality, but the solution having never had in the problem that delivers from godown of grain.The mode of manpower and mechanical assistance (grain scraper, the conveying worm delivers from godown) shortcomings such as delivering from godown all exists output less than normal, and working environment airborne dust is large, labour intensity height, the requirement of can not meet fast, efficient, environmental protection is delivered from godown; Grain absorber can meet problems, but grain absorber is generally arranged on harbour, and the size of its critical component deduster is huge, is not suitable for the requirement that storehouse is used with mobile unit.

Referring to Fig. 1, is the structural representation of a kind of storehouse of the prior art with the deduster of grain absorber.Deduster comprises that the top of deduster cylinder 5, deduster cylinder 5 arranges 1 sealing of deduster lid, the tapered design in bottom, and material outlet 4 is set, material inlet 3 is arranged on deduster cylinder 5 sides; On the top of deduster cylinder 5, be provided with cloth cylinder 7, pulse tracheae 2 and air outlet slit 6.During deduster work, gas logistics enters deduster cylinder 5 by material inlet 3, and because volume becomes suddenly large, material moves downward under Action of Gravity Field, by material outlet 4, is entered follow-up equipment airlock and is discharged confined space by it; Dust laden air is under the effect of wind regime machine, move upward, pure air is through cloth cylinder 7, by air outlet slit 6, through source of the gas, enter atmosphere, dust is by 7 trappings of cloth cylinder, the gases at high pressure of pulse tracheae 2 outputs that regularly open and close carry out blowback to cloth cylinder 7, and dust departs from cloth cylinder 7 and falls into deduster cylinder 5 bottoms, and together discharges with material.

One, sedimentation for dust, the diameter of deduster cylinder 5 is selected to such an extent that be the bigger the better, but the dust remover of grain elevator for high external pressure, large cylindrical shell requires thicker material, higher height, and economy is inadequate, be not suitable for the requirement of deduster miniaturization, reasonably selecting barrel diameter is the key that reduces deduster appearance and size.For grain absorber deduster, the selection of deduster cylinder 5 diameters should be convenient to the impurity in separated cereal, makes the impurity of floating velocity below 0.6m/s can't help cloth cylinder 7 and carries out separation, alleviates the operating pressure of cloth cylinder 7; In industry, for being calculated as of the diameter of deduster cylinder 5:

$J=2\sqrt{\frac{Q}{\mathrm{\π}\·v}}\left(m\right)$

In formula: J is the diameter (m) of deduster cylinder 5; Q is that deduster is processed air quantity (m ³/ s); V is the interior ascending air speed (m/s) (getting v=0.6m/s herein) of the cylinder of deduster cylinder 5.

Two, the size of material inlet 3 K value and E value as shown in Figure 1, E value depends on k value and exists, and its formula is:

E＝K·sina+h(mm)

In formula: a is charging aperture base plate and horizontal sextant angle (a is 40 ° herein); H is at locating to get 200mm; K value is definite by the suction revolution of arm radius at charging aperture place, stretches the equipment that is less than 12m for arm, and its bearing and turning radius generally can not surpass 500mm, and its K value is not more than 1000mm (the twice radius of gyration).

Three, the bottom design of deduster cylinder 5 is that taper is to flow out smoothly material outlet 4 for convenience of material and impurity, and its dimensional parameters is relevant with the bulk density of material, according to the conventional design of industry, angle β is the requirement that the cone of 80 ° can meet all kinds of grain materials, and its F value is:

$F=\frac{J-H}{2}\tan \left(\frac{80}{2}\right)$

H value determined by airlock size, and G value is due to hand hole will be set, and general value is for being more than or equal to 150mm.

In four, Fig. 1, material inlet 3 is to the determining of the distance D value between at the bottom of cloth cylinder, the setting of D value is in order to make ascending air have sufficient deceleration distance, thereby better separated airborne impurity alleviates cloth cylinder operating pressure.Harbour grain absorber dimensional requirement is looser, so the D value of harbour grain absorber is all chosen greatlyr, is generally chosen for the barrel dliameter of 0.5 times of deduster cylinder 5.

Five, the length of cloth cylinder 7 is processed air quantity according to cloth cylinder and is determined, the filter wind wind speed of the cloth cylinder of harbour machine is selected lowlyer, is generally less than 1.5m/s.The length of cloth cylinder 7 should meet following formula:

$C=\frac{Q}{\mathrm{v\πdn}}\left(m\right)$

In formula: Q is that deduster is processed air quantity (m ³/ min); D is the diameter (m) of cloth cylinder 7; N is the quantity (individual) of cloth cylinder 7; V is filter wind wind speed (m/s).

Six, determining of Fig. 1 air-purifying chamber height B value, air-purifying chamber height B value is determined by the structure of pulse air winding-up system, generally can not be less than 150mm.

Seven, in the deduster of existing grain absorber, deduster lid 1 is because its pressure is less than normal and manufacture craft requirement, generally be made into the form of conical shell (being commonly called as concentric reducer), for reducing height, choosing generally of cone angle all can be greater than 120 °, for guaranteeing that its intensity generally makes reinforcement and process in inside, so the physical dimension of deduster lid should be calculated according to the structure of reinforcement flat cover.

Reinforcement flat cover material thickness by following formula, determined:

$\mathrm{\δ}=0.55d\sqrt{\frac{p}{\left[\mathrm{\σ}\right]}}\left(\mathrm{mm}\right)$

In formula: 6 is flat cover sheet metal thickness (mm); D is top diameter (mm); P is container external pressure (MPa); [σ] is material allowable stress (MPa).

The gusset cross section of reinforcement flat cover generally adopts rectangle, and rectangle ratio of height to thickness is got 5-8, and gusset quantity is 6, and gusset cross section allowable composite bending modulus is

$W\≥0.08\frac{{\mathrm{PD}}^3}{n\left[\mathrm{\σ}\right]}\left({\mathrm{mm}}^3\right)$

In formula: W is gusset module of anti-bending section (mm ³); P is container external pressure (MPa); D is the diameter (mm) of deduster lid 1; N is gusset quantity; [σ] is material allowable stress (MPa).

By rectangle Box Section composite bending modulus, ask depth of section and width:

$W=\frac{{\mathrm{BH}}^3-{\mathrm{bh}}^3}{6H}$

In formula: B is wide outside square-section (mm); H is high (mm) outside square-section; B is square-section inner width (mm); H is high (mm) in square-section; W is gusset module of anti-bending section (mm ³).In formula, interior outer room thickness is according to the thickness of deduster lid 1, and H/B value is calculated according to 6.

The grain absorber of 100 types of take is example, its source of the gas air quantity Q=75m ³/ min, system pressure P=0.05MPa calculates, and deduster physical dimension value is as follows: A=170mm, B=150mm, C=1250mm, D=800mm, E=715mm, F=460mm, G=150mm, H=500mm, J=1600mm, K=800mm; Deduster height is: A+B+C+D+E+F+G=3695mm.Storehouse with grain absorber height is: deduster height+airlock height+conveyer height+equipment terrain clearance.

Affected by the warehouse entry gradient and grain absorber wheelbase, equipment terrain clearance should not be less than 200mm; Airlock is affected by volume, should guarantee in 600mm left and right; Adapted 65 type conveyers, its height minimum of a value is 300mm; Grain absorber height is in 4800mm left and right.General horizontal warehouse door height is in 4000mm left and right, and equipment can not meet the requirement of warehouse entry operation.Reducing deduster height is the key of grain machine deduster miniaturization for storehouse, and the height of deduster does not have the space of compression in the size of air-purifying chamber, cloth tube length degree and charging aperture position; Thereby the research of deduster miniaturization will be optimized other structural design of deduster.

Utility model content

The utility model object is to provide a kind of deduster of grain absorber, large to solve the deduster physical dimension of grain absorber in prior art, is not suitable for the technical problem that storehouse is used with mobile unit.

For achieving the above object, according to an aspect of the present utility model, provide a kind of deduster of grain absorber, comprised deduster cylinder, the top of deduster cylinder arranges deduster cap seal and closes, and bottom arranges material outlet, and material inlet is arranged on deduster cylinder side; In deduster cylinder, be provided with filter, filter top is provided with pulse tracheae and air outlet slit, the bottom of deduster cylinder is flat-bottom structure, in material outlet side, be provided with scraping machine structure, scraping machine structure comprises scrapes the power unit that grey vane rotary is scraped in grey impeller and driving, scrapes grey impeller and comprises impeller shaft and be arranged on the blade on impeller shaft.

Further, blade be take impeller shaft and along spiral of Archimedes, is stretched out as starting point.

Further, between two adjacent blades, being provided with bracing piece connects.

Further, the quantity of impeller shaft blade is three.

Further, power unit is motor.

Further, described deduster lid is flat-tope structure, and the below of deduster lid is provided with support column, and support column one end is connected with deduster lid, and the other end is connected with supporting seat board, and supporting seat board is fixed on the orifice plate of filter.

Further, the cross section of supporting seat board is triangular in shape.

Further, on the orifice plate of filter, be provided with orifice plate reinforcement.

Further, pulse tracheae is arranged on support column and the junction of supporting seat board.

Further, the distance of material inlet and filter bottom is not more than 300mm.

The utlity model has following beneficial effect:

The height of deduster cylinder reduces greatly, can realize the design of deduster miniaturization, is applicable to the put in storage requirement of operation of mobile grain-suction machine.

Except object described above, feature and advantage, the utility model also has other object, feature and advantage.Below with reference to figure, the utility model is described in further detail.

Accompanying drawing explanation

The accompanying drawing that forms the application's a part is used to provide further understanding of the present utility model, and schematic description and description of the present utility model is used for explaining the utility model, does not form improper restriction of the present utility model.In the accompanying drawings:

Fig. 1 is the structural representation of the deduster of grain absorber of the prior art;

Fig. 2 is the structural representation of the deduster preferred embodiment of a kind of grain absorber of the utility model;

Fig. 3 scrapes the structural representation of grey impeller in the deduster preferred embodiment of a kind of grain absorber of the utility model;

Fig. 4 is the enlarged diagram in a region in Fig. 2; And

Fig. 5 is a fluid stream Flow Field Distribution figure of the deduster preferred embodiment of a kind of grain absorber of the utility model.

The specific embodiment

Below in conjunction with accompanying drawing, embodiment of the present utility model is elaborated, but the multitude of different ways that the utility model can be defined by the claims and cover is implemented.

Refer to Fig. 2 and Fig. 3, preferred embodiment of the present utility model provides a kind of deduster of grain absorber, comprises deduster cylinder 105, and the top of deduster cylinder 105 arranges 101 sealings of deduster lid, bottom arranges material outlet 104, and material inlet 103 is arranged on deduster cylinder 105 sides; In deduster cylinder 105, be provided with filter 107 (as, cloth cylinder), filter 107 tops are provided with pulse tracheae 102 and air outlet slit 106, the bottom of deduster cylinder 105 is flat-bottom structure, in material outlet 104 sides, be provided with scraping machine structure, scraping machine structure comprises scrapes the power unit 108 that grey vane rotary is scraped in grey impeller and driving, scrapes grey impeller and comprises impeller shaft 110 and be arranged on the blade 109 on impeller shaft 110.

Adopt this kind of structure, drop and can be passed to material outlet 104 by scraping machine structure at material and the dust of deduster cylinder 105 bottoms, finally from material outlet 104, discharge.Therefore, the bottom of deduster cylinder 105 need not be designed to taper, refers to Fig. 1, and the F shown in figure and G size need not design, and the height of deduster cylinder 105 can reduce greatly, realizes the design of deduster miniaturization.

Preferably, for improving, scrape the passing effect of grey impeller to material and dust, prevent that material and dust from piling up in the bottom of deduster cylinder 105, the impeller shaft 110 of scraping grey impeller is provided with three blades 109, and blade 109 be take impeller shaft 110 and along spiral of Archimedes, stretched out as starting point.When scraping grey vane rotary, the impeller shaft 110 of take can make material and dust to the centrifugal direction of blade 109, move fast along the outward extending blade 109 of spiral of Archimedes as starting point; Meanwhile, blade 109 work under bad environment, are the intensity of reinforced blade 109, prevent that blade 109 from coming off from impeller shaft 110, be provided with bracing piece 111 and connect between two adjacent blades 109.For simplifying the structure of scraping machine structure, power unit 108 preferably adopts motor to drive and scrapes grey impeller.

Refer to Fig. 4, preferably, for further reducing the height of deduster cylinder 105, deduster lid 101 is flat-tope structure, below in deduster lid 101 is provided with support column 112, support column 112 one end are connected with deduster lid 101, and the other end is connected with supporting seat board 113, and supporting seat board 113 is fixed on the orifice plate 115 of filter 107.At deduster, cover 101 when stressed, the direction of propagation of its power is: the orifice plate 115 of deduster lid 101-support column 112-supporting seat board 113-filter 107, makes deduster cover 101 suffered power dispersed.This kind of structure, deduster lid 101 need not be made into the form of conical shell (being commonly called as concentric reducer), all eliminates and makes the gusset height producing with muscle flat cover, reduces the height of deduster cylinder 105.

Preferably, be the uniformity of the pressure on the orifice plate 115 of raising filter 107, the cross section of supporting seat board 113 is triangular in shape; This structure, bottom surface and the orifice plate 115 of supporting seat board 113 have larger contact area, when the pressure on deduster lid 101 conducts on orifice plate 115 by supporting seat board 113, pressure can form uniformly and distribute on orifice plate 115, to improve the bearing capacity of orifice plate 115; Meanwhile, be also further to improve the bearing capacity of orifice plate 115, on the orifice plate 115 of filter 107, be provided with orifice plate reinforcement 114.

Preferably, be simplified structure, pulse tracheae 102 is arranged on support column 112 and the junction of supporting seat board 113.This structure can realize pulse tracheae 102 covers 101 integrated designs with deduster; Meanwhile, pulse tracheae 102 also can bear deduster and cover 101 suffered pressure.

In existing grain absorber, the distance of material inlet 103 and filter 107 bottoms is generally the barrel dliameter of 0.5 times of deduster cylinder, and numerical value is all larger; Preferably, for further reducing the height of deduster cylinder 105, material inlet 103 is not more than 300mm with the distance of filter 107 bottoms.Refer to Fig. 5, in deduster, the motion effects of air-flow is to the use of deduster, and wherein the VELOCITY DISTRIBUTION of ascending air is larger on dust and air separation impact.When entering the ascending air speed of filter bottom when large, dust is easy to adhere to filter, increases filter working strength, reduces filter service life, increases pressure drop, and machine efficiency is reduced.By, the deduster flow field that point-by-point method is made distributes.According to map analysis, when the distance h 1 of material inlet 103 and filter 107 bottoms remains on 300mm height, basic guarantee air velocity be stabilized on theoretical upflow velocity, be conducive to dust and light assorted separation.

As can be seen from the above description, the utility model the above embodiments have realized following technique effect:

The height of deduster cylinder reduces greatly, can realize the design of deduster miniaturization.The grain absorber of 100 types of take is example, the height of deduster can narrow down to 2440mm, add the height of miscellaneous equipment, grain absorber height is in 3500mm left and right, compare (4800mm) with the height of the grain absorber of 100 types in known technology, the height of grain absorber reduces greatly, met the put in storage requirement of operation of equipment.

The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model; For a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.

Claims (10)

1. the deduster of a grain absorber, comprise deduster cylinder (105), the top of described deduster cylinder (105) is provided with for sealing the deduster lid (101) of described deduster cylinder (105), bottom arranges material outlet (104), and material inlet (103) is arranged on the sidewall of described deduster cylinder (105); In described deduster cylinder (105), be provided with filter (107), described filter (107) top is provided with pulse tracheae (102) and air outlet slit (106), it is characterized in that:

The bottom of described deduster cylinder (105) is flat-bottom structure, in described material outlet (104) side, be provided with scraping machine structure, described scraping machine structure comprise scrape grey impeller and drive described in scrape the power unit (108) of grey vane rotary, described in scrape grey impeller and comprise impeller shaft (110) and be arranged on the blade (109) on described impeller shaft (110).

2. the deduster of a kind of grain absorber according to claim 1, is characterized in that:

Described blade (109) be take described impeller shaft (110) and along spiral of Archimedes, is stretched out as starting point.

3. the deduster of a kind of grain absorber according to claim 1 and 2, is characterized in that:

Between two adjacent described blades (109), being provided with bracing piece (111) connects.

4. the deduster of a kind of grain absorber according to claim 1 and 2, is characterized in that:

The quantity of the above blade of described impeller shaft (110) (109) is three.

5. the deduster of a kind of grain absorber according to claim 1, is characterized in that:

Described power unit (108) is motor.

6. the deduster of a kind of grain absorber according to claim 1, is characterized in that:

Described deduster lid (101) is flat-tope structure, the below of described deduster lid (101) is provided with support column (112), described support column (112) one end is covered (101) with described deduster and is connected, the other end is connected with supporting seat board (113), and described supporting seat board (113) is fixed on the orifice plate (115) of described filter (107).

7. the deduster of a kind of grain absorber according to claim 6, is characterized in that:

The cross section of described supporting seat board (113) is triangular in shape.

8. the deduster of a kind of grain absorber according to claim 6, is characterized in that:

On the orifice plate (115) of described filter (107), be provided with orifice plate reinforcement (114).

9. the deduster of a kind of grain absorber according to claim 6, is characterized in that:

Described pulse tracheae (102) is arranged on the junction of described support column (112) and described supporting seat board (113).

10. the deduster of a kind of grain absorber according to claim 1, is characterized in that:

Described material inlet (103) is not more than 300mm with the distance of described filter (107) bottom.

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