CN207308349U - A kind of blast type cylindrical pre-cleaning screen - Google Patents

Abstract

A kind of blast type cylindrical pre-cleaning screen, including rack, the rotary screen that the rack passes through carrying roller support cylinder shape, rotary screen is divided into the scalping for the inner side being fixed together and the dusting cover of outer layer, end is sent into one end of dusting cover for grain, another end is equipped with shaft, shaft connecting power device, the grain of rotary screen is sent into end and is higher than one end equipped with shaft, scalping is exported in one end equipped with shaft equipped with coarse fodder, dusting cover is equipped with grain mouth in one end lower part equipped with shaft, the bottom of rack is equipped with thin miscellaneous outlet, the side connection air blower of grain mouth, offside connects fan outlet.Relative to the prior art, the technique effect of the utility model is that the drum sieve of the utility model design is two layers, its feed end is high, and discharge end is low, using the gravity of grain itself, preferably eliminates impurity.

Description

A kind of blast type cylindrical pre-cleaning screen

Technical field

The equipment that the utility model is related to drying grain.

Background technology

As kind of a grain scale constantly expands, grain is all dried using grain drying machine more in big farming household, exactly passes through pot Stove heat, produces hot wind, is blown against grain, comes out the moisture in grain, completes drying.

Utility model content

The technical problems to be solved in the utility model is：Contain impurity in present grain, some impurity compare grain It is small（Such as dust）, some impurity are bigger than grain（Such as the grain stalk of small end）, currently without suitable equipment.

The technical solution of the utility model is specially：

A kind of blast type cylindrical pre-cleaning screen, including rack, the rack pass through the rotary screen of carrying roller support cylinder shape, rotation The scalping of inner side to be fixed together and the dusting cover of outer layer are sieved, end, another end are sent into an end of dusting cover for grain Portion is equipped with shaft, shaft connecting power device, and the grain of rotary screen is sent into end and is higher than one end equipped with shaft, and scalping is equipped with turning One end of axis is exported equipped with coarse fodder, and dusting cover is equipped with grain mouth in one end lower part equipped with shaft, the bottom of rack be equipped with carefully it is miscellaneous go out Mouthful, the side connection air blower of grain mouth, offside connection fan outlet.

The inner surface of scalping or/and dusting cover is equipped with helical raised.

Relative to the prior art, the technique effect of the utility model is that the drum sieve of the utility model design is two layers, its Feed end is high, and discharge end is low, using the gravity of grain itself, preferably eliminates impurity.

Brief description of the drawings

Fig. 1 is the schematic diagram of dryer.

Fig. 2 is the schematic diagram of drying machine.

Fig. 3 is the cross-sectional view of the first bringing-up section.

Fig. 4 is the vertical section schematic diagram of the first bringing-up section.

Fig. 5 is the vertical section schematic diagram of the second bringing-up section.

Fig. 6 is the schematic diagram of cylindrical pre-cleaning screen.

Fig. 7 is the schematic diagram of grain discharge device.

Fig. 8 is the schematic diagram of blade amplification.

Fig. 9 is the schematic diagram of wind mixed chamber.

Figure 10 is the schematic diagram of the grain mouth of cylindrical pre-cleaning screen.

Figure 11 is the schematic diagram of the air section of hot wind inlet air branch pipeline.

Figure 12 is the schematic top plan view of Figure 11.

Embodiment

Such as Fig. 1, a kind of grain drier, including raw grain storehouse 1, raw grain storehouse 1 connect cylindrical pre-cleaning screen 2 by elevator 11, Cylindrical pre-cleaning screen 2 connects drying machine 3 by elevator 11, and drying machine 3 connects grain storehouse 12 by elevator 11.In raw grain storehouse 1 Grain be stored in grain storehouse after cylindrical pre-cleaning screen 2, drying machine.Drying machine 3 is followed successively by grain entrance, drying from top to bottom Section, cooling section, grain-export 39, set cooling section be because：If directly stored without cooling, due to air after grain heat-drying The heat that unsmooth flowing causes grain to carry is difficult to distribute, and hot environment mould growth ultimately causes decline or the hair of grain quality It is mould.

Such as Fig. 1, drying section connection heating unit and hot wind exhaust outlet, cooling section connect heat sink and cold wind exhaust outlet. Multiple hot wind exhaust outlets, cold wind exhaust outlet are located at the symmetrical both sides of drying machine（In order to draw conveniently, side has only been drawn in figure）.

Such as Fig. 1, heat sink includes air-cooler 6 and cold wind blast pipe 61, and cold wind blast pipe 61 connects cooling section.

As shown in Figure 1, Figure 2, Fig. 9, heating unit include hot-blast stove 4, and hot-blast stove 4 connects heat exchanger 41, the connection of heat exchanger 41 three A wind mixed chamber 42, three wind mixed chamber 42 are respectively communicated with the first hot-air inlet pipe road 73, the second hot-air inlet pipe road 72, the 3rd hot wind Intake stack 71, drying section are followed successively by first, second, third drying section, first the 73, second heat of hot-air inlet pipe road from top to bottom Wind intake stack 72, the 3rd hot-air inlet pipe road 71 are respectively communicated with first, second, third drying section.Because the first, secondth, The moisture content of three drying section grains declines successively, if using the hot wind of same temperature, the hot wind in drying section two, drying section three Can be burned by the crust of grain, influence the quality of grain.The first drying section on top makes grain using higher hot blast temperature It is rapidly heated, and takes away a part of surface moisture；Second drying section sloughs large quantity of moisture using medium hot blast temperature；3rd drying Duan Caiyong lower temperatures both can reach the purpose sloughed in the stronger moisture of grain intragranular portion adsorption capacity.So the first hot-air inlet pipe Road 73, the second hot-air inlet pipe road 72, the temperature in the 3rd hot-air inlet pipe road 71 reduce successively, for example, respectively 160,140, 120℃。

Such as Fig. 2, in order to there is a preferable heating effect, first, second, third drying section is all divided into two heating layers, and first Hot-air inlet pipe road 73, the second hot-air inlet pipe road 72, the 3rd hot-air inlet pipe road 71 all by threeway connect two hot winds into Wind branch pipeline 74, each hot wind inlet air branch pipeline 74 connect a heating layer.In this way, thermal efficiency doubles.

In fact, grain will pass through the time of a few hours from the grain entrance of drying machine 3 to grain-export, in order to avoid grain There is larger difference in the time of food heating or cooling, the grain flow velocity of longitudinal grain runner preferably, so, such as Fig. 3,4, The heating layer horizontal direction array of first drying section arranges multiple cone buckets 31, the junction between adjacent cone bucket 31（Referring to attached drawing Mark 36）Sealing, the bottom of cone bucket 31（Referring to reference numeral 32）The logical grain flowing tube 33 of connection, leads to grain flowing tube 33 and connects two heating Delay section 99 between layer, the space between two adjacent cone buckets 31（Referring to reference numeral 37）, should for the heating air duct of this section The bottom surface of heating air duct is the grain layer of delay section 99, and side is the tube wall of grain flowing tube 33, and upper surface is the side wall of cone bucket 31, The both ends of the heating air duct of this section all connect the first hot-air inlet pipe road 73, open up hot wind exhaust outlet on delay section, hot wind is under Flow in the grain gap of layer delay section and discharged on the both sides wallboard that delay section is provided with hot wind exhaust outlet.When grain is from grain Eat after mouth comes in, grain position higher than cloth grain bucket and is in a suitable height under the control of level detector in machine, is uniformly distributed In the inside of cone bucket 3, at the uniform velocity enter next bringing-up section from the inside of cone bucket 3 because each cone bucket 3 is relatively independent, each other flow velocity from Influence, so, heating time difference is smaller.In first drying section, four walls of cone bucket 3 and the outside of flowtube are in hot wind action Under the grain in cone bucket and flowtube is rapidly heated, and taken away a part of surface moisture.

In order to facilitate processing, cone bucket 31 is rectangular pyramid.

Such as Fig. 5, be arranged in parallel multiple pentagon pipelines 38 in second, third drying section, its vertical section is pentagon, thereon The section in portion is the rectangular cross-section of triangle, lower part, its upper surface is two boards, and side is two boards, and bottom surface directly contacts Grain, the both ends of pentagon pipeline 38 all connect the second hot-air inlet pipe road 72 or the 3rd hot-air inlet pipe road 71, hot wind from The both sides of pentagon angular tube 35 enter in drying machine, and the gap from the bottom surface of pentagon pipeline 38 along grain is expanded downwards Dissipate, discharged from hot wind exhaust outlet.After the 3rd drying section, grain kernel temperature has built up, so dryer section uses below Lower temperature, which not only can reach, sloughs the stronger moisture of grain intragranular portion adsorption capacity, but also can avoid the excessive of grain temperature rise.

Such as Fig. 5, be arranged in parallel multiple pentagon pipelines 38 in cooling section, its vertical section is pentagon, the section of its upper part For triangle, the rectangular cross-section of lower part, its upper surface is two boards, and side is two boards, and face directly contacts grain, pentagon The both ends connection cold wind blast pipe 61 of pipeline 38, cold wind enters in drying machine from the both sides of pentagon angular tube 35, from pentagon The bottom surface of pipeline 38 is diffused downwards along the gap of grain, is discharged from cold wind exhaust outlet.Cooling section cools down for adverse current, material By cool time 1.5 it is small when, cooling fully, thoroughly, be conducive to storage after safe storage.

Such as Fig. 7, the top of grain-export 39 is equipped with grain discharge device, and under its drive, grain is uniformly discharged into grain Food outlet 39, helps to be evenly heated.Discharge device includes multigroup six impellers grain draining crop mechanism, and multigroup six impellers grain arranges grain Mechanism is connected by synchronous belt 89 with a motor 88, and motor is equipped with frequency converter.Synchronous belt 89 alternately connects six impeller grains Eat top, the lower part of draining crop mechanism.The yield of drying machine and grain matter are closely related.The moisture of grain greatly then grow by drying time, grain The small then drying time of moisture of food is short.The driving of this draining crop mechanism adjusts rotating speed using frequency converter, during work, by adjusting adjusting Plate controls the drying time of grain with the gap of row's grain axis impeller and the rotating speed of row's grain axis, so as to reach guarantee dries quantity On the premise of adjust yield purpose.

Such as Fig. 8, each six impellers grain draining crop mechanism includes delivery plate 81, collecting board 82, and composition grain falls both it Passage, the lower section of grain dropping channel are equipped with drive roll 87, and drive roll 87 fixes more six blades 86, blade 86 in the radial direction The outlet gap of rotating outer contour 85 and grain dropping channel coordinates, and one end of drive roll 87 connects six impellers row's grain axis 84, The plate wheel connection synchronous belt 89 of six impellers row's grain axis 84.

Such as Fig. 7,8, the machine volume is larger, is typically all use site assembling, in fact, six impellers row's grain axis 84 rotates Outer contour 85 and the rigging error of the outlet of grain dropping channel it is larger, for this reason, the lower section of collecting board 82 connects adjustable entire row The adjustable plate 83 in grain gap, can effectively solve the problems, such as that fit-up gap is non-uniform.

Such as Fig. 9, the first hot-air inlet pipe road 73, the second hot-air inlet pipe road 72, the 3rd hot wind inlet air are adjusted for convenience The temperature of pipeline 71, heat exchanger 41 connect three connecting pipes 43, and each connecting pipe 43 connects wind mixed chamber 42, three wind mixed chamber 42 the first hot-air inlet pipe roads 73 of difference, the second hot-air inlet pipe road 72, the 3rd hot-air inlet pipe road 71, connecting pipe 43 are equipped with Air intlet 44, air intlet 44 are equipped with control valve 45, and wind mixed chamber 42 is equipped with thermocouple thermometer 47.Follow up thermometer 47 Reading, adjust the intake of air intlet 44, according to intake number, adjust the temperature in hot-air inlet pipe road.

Such as Fig. 1, hot wind exhaust duct 51 carries vapor, and directly row on the outer wall, can be bonded dust, not hygienic enough, so, Multiple hot wind exhaust outlets, cold wind exhaust outlet are parallel to a connection exhaust uptake 51, and connection exhaust uptake is connected at tail gas Manage tower 5, centralized processing.

The place to use of the machine is mostly our northeast locations, and the clinker of hot-blast stove 4 can fall into slag remover, be embedded in ash water tank Handle, can freeze in the winter ash water tank in northeast, influence the normal operation of mechanical slag remover.For this reason, hot-blast stove 4 is located at boiler In room 49, cold wind exhaust outlet connection cold wind exhaust duct 62, cold wind exhaust duct 62 connects boiler room 49.Outdoor wind to grain cooling After cooling section, temperature can be raised to 30 DEG C or so, be sent in boiler room 49, and buck is it also avoid while heating Groove freezes.Cold wind exhaust duct 62 is externally provided with insulating layer.

Such as Fig. 6, cylindrical pre-cleaning screen 2 includes rack 21, and rack 21 passes through the rotary screen of 22 support cylinder shape of carrying roller, rotary screen It is divided into the scalping 24 for the inner side being fixed together and the dusting cover 23 of outer layer, end is sent into an end of dusting cover 23 for grain（It is first End）, another end is equipped with shaft（Tail end）, shaft connecting power device 27, the grain feeding end of rotary screen, which is higher than to be equipped with, to be turned One end of axis, scalping 24 are equipped with coarse fodder outlet 25 in one end equipped with shaft, and dusting cover 23 is equipped with one end lower part equipped with shaft Grain mouth 28, the bottom of rack 21 are equipped with thin miscellaneous outlet 29.Its operation principle is：After grain enters from feeding end, in shaft Drive under, rotary screen rotation, because gravity can be rotated in it, grain declines grain with smaller debris from the mesh of scalping 24 Enter on dusting cover 23, meanwhile, dusting cover 23 also rotates, and smaller debris falls into fines outlet 29 from the mesh of dusting cover 23, in dusting cover 23 Grain back towards tail end movement, until grain mouth 28 is discharged, the relatively bigger material in scalping 24 is moved to its tail end, until from coarse fodder The discharge of outlet 25.Thin miscellaneous outlet 29 is extended at a carrying roller 22 at another carrying roller 22, the thin miscellaneous discharge space of increase.

Grain, debris in order to facilitate rotary screen caudad move, and the inner surface of scalping 24 or/and dusting cover 23 is equipped with spiral Shape protrusion 26, the protrusion can accelerate grain caudad to move.

Such as Figure 10, in rotary course, net grain can be mingled with some dust and other impurities, the side connection of grain mouth 28 when flowing out Air blower 20, offside connection fan outlet, air blower are removed debris using wind speed, the similar action winnowed of the action.Net grain By after filtering by being re-fed into drying machine.

Such as Figure 11, Figure 12, the air section of hot wind inlet air branch pipeline 74 is L-type, because its air outlet is wider, can be made Intake velocity, intake into the left and right sides is different, and air quantity due to entering drying machine tuyere position or so inequality, causes The grain uneven heating of diverse location in tower, all grain qualities that have impact on after drying, for this reason, the turn of wind branch pipeline 74 Place is equipped with three air regulating boards 741, and the two sides of wind branch pipeline 74, which is respectively welded, is fixed on lower rotary shaft set 742, upper shaft set 744, Shaft 743 is worn in two axle sleeves, air regulating board 741 is fixed in shaft 743.The outside of the aweather branch pipeline 74 of shaft 743 （The side of upper shaft set 744）Extend and fix crank 745, clamping screw 746 is fixed on crank 745, upper shaft covers solid on 744 Scale plate 747 is determined, scale plate 747 is equipped with multiple location holes 740 coordinated with clamping screw 746.

Because air regulating board 741 is in hot wind inlet air branch pipeline 74, it is impossible to it is visible directly, its position is determined for convenience, The direction of air regulating board 741 on a straight line, so can determine tune wind with the direction of crank 745 by the direction of crank 745 The direction of plate 741.

In use, hot wind is come in from air intake 749, enter drying machine from outlet air end 748.Crank 745 is rotated, drives and rotates Shaft 743 and air regulating board 741 rotate together during crank, and after turning to suitable position, it is fixed on quarter with clamping screw 746 Spend in the location hole 740 of plate 747.Since air regulating board have rotated certain angle, changed in hot wind into air regulating board after Gas inlet tube The direction of hot wind, air quantity, under the collective effect of three hot wind plates, realize to the balanced ventilation on drying machine left and right directions. So that the grain in tower is heated evenly, the grain quality after drying is improved.

Above-described is only the preferred embodiment of the utility model, it is noted that for those skilled in the art For, under the premise of the utility model general idea is not departed from, some changes and improvements can also be made, these should also be considered as The scope of protection of the utility model.

Claims (2)

1. a kind of blast type cylindrical pre-cleaning screen, including rack（21）, it is characterised in that：The rack（21）Pass through carrying roller（22）Branch The rotary screen of tubular is held round, rotary screen is divided into the scalping for the inner side being fixed together（24）With the dusting cover of outer layer（23）, dusting cover （23）An end for grain be sent into end, another end is equipped with shaft, shaft connecting power device（27）, the grain of rotary screen Food is sent into end and is higher than one end equipped with shaft, scalping（24）Exported in one end equipped with shaft equipped with coarse fodder（25）, dusting cover（23） Grain mouth is equipped with one end lower part equipped with shaft（28）, rack（21）Bottom be equipped with thin miscellaneous outlet（29）, grain mouth（28） Side connection air blower（20）, offside connection fan outlet.

2. blast type cylindrical pre-cleaning screen as claimed in claim 1, it is characterised in that：Scalping（24）Or/and dusting cover（23）It is interior Surface is equipped with helical raised（26）.