CN2499370Y - Integrated double screw transport and discharge device with small diameter, easy dismantling and speed limiting - Google Patents

Abstract

An integrated double screw transport and discharge device with small diameter, easy dismantling and speed limiting is used to solve the problem of transport and discharge of bulk material and particularly the transport and discharge of bulk material along overall height in large-scale bunker to prevent breaking of lump material. The utility model consists of a holding frame, a screw chute, a joining guide rail and a slipway, wherein the screw chute which is provided with a material distributor is an integrated double screw chute; the guide rail fixed on the holding frame and the slipway fixed on the screw chute are connected between the screw chute and the holding frame; in addition, a speed limiting drag board is arranged inside the double screw chute. The utility model has small overall size but big capacity of transport and discharge and is easy to assemble and disassemble; moreover, the utility model can realize humping according to the speed at which soft lump material can not be broken and can meet the requirements of different humping volumes of run coal; therefore, the utility model is suitable for transport and discharge of bulk material loaded on car or ship and at coaling base of coal mine, mine and industrial building.

Description

The disjunctor double helix apparatus for delivering of minor diameter speed limiting easy to assemble

Technical field

It is the disjunctor double helix apparatus for delivering of a kind of minor diameter speed limiting easy to assemble that the utility model relates to, it be a kind of bulk material vertically transfer feedway, particularly be applicable to the coal stone mine, in the aboveground coal bunker down for reducing the feedway of transferring of piece charcoal loss.

Background technology

Along with the mining mechanization degree improves, the restriction of raising that forefront of the production stope unit productive capacity is tens times and the upper and lower transportation of well, washing ability is inharmonious, has only with the way of setting up coal bunkers at different levels and solves the contradiction that product, fortune, working ability do not match.The saving that modernized large-scale mine generally will pass through level Four coal bunker (district coal bin, shaft coal pocket, well head coal bunker, coal preparation plant piece charcoal storehouse) just can transport mine, the coal bunker height is generally at 13-80M, substantially exceed the potential energy height of piece charcoal self fragmentation, so stope first line is produced 50% piece charcoal major part and is fallen and lost when packing coal bunker into.Huge to coal stone mine economic loss, particularly primary coal is particularly serious with regard to softer ore deposit, as the coal stone mine, be both that comprehensive mechanical coal mining, Jincheng coal are hard, Yangquan coal is soft, Jincheng pin coal cinder rate is 30%, contain the piece rate through pin coal after the coal bunker transformation and bring up to 45%, compare 400,000,000 yuan of the annual just many losses of positive coal group with this.

In order to liberate this problem, coal circle of various countries has been made extensive work, as Russia in piece charcoal storehouse, used the fifties diameter as 3.2M, the major diameter spiral scraper-trough conveyers that the angle is 35 degree fall.The bulkhead scraper-trough conveyer has been dug in the seventies by Germany, has dug the alcove of dark 0.5M, high 1.3-0.8M exactly on the coal bunker wall, and angle 35 degree fall in the bulkhead rolling, lets out angle 35 degree down.China sun coal group transforms the russian scraper-trough conveyer, and the reduced of spiral scraper-trough conveyer belongs to intermediate diameters to 2.1M, falls the angle and drops to 22 degree by 28 degree.These spiral scraper-trough conveyers do not have the reason that large-scale popularization is used, and are that russian scraper-trough conveyer diameter is too big, and are stressed big, can be washed away by the dynamic pressure of bulk cargo when storage bin collapses the storehouse.Germany's scraper-trough conveyer difficulty of construction is big.Because the coal bunker actual diameter is many at 5M-10M, requires rolling speed big, general initial velocity will be more than 8.5m/S, and the broken speed of self kinetic energy of cherry coal has only 4m/S, and it is limited therefore to protect the piece effect.The spiral scraper-trough conveyer of Yuanyang coal design and drawing office has adopted the structure identical with Russia, and section is by 8.14M ²Drop to 3.46M ², structural strength is enough, but stuffy in the storehouse, and bulk cargo is very moist, and the bolt of former joint piece all rust is dead, must weld constructional difficulties after the chute mill leaks in the storehouse; Dangerous being forced to of biogas stopped using because the remaining biogas that welding slag falls into coal bunker ignites again.At present, piece charcoal storehouse changes the system storehouse into by single coal bunker, by an end along slipping the coal mobile coal supply in slope, this kind practice has reduced the piece problem of falling, but the piece charcoal is the round as a ball one-tenth piece of piece charcoal egg when sliding down the high slope of 13-17M, it is high at 15-20% to contain powder lower limit rate, is still distinct issues so coal stone is protected the piece problem.

Summary of the invention

The purpose of this utility model provides the disjunctor double helix apparatus for delivering of a kind of minor diameter speed limiting easy to assemble, to satisfy the problem of magma coal rolling under low linear velocity.For being suitable for the rolling of coal bunker in the modernized mine, must solve following 5 problems: diameter, (2) whole equipment that (1) dwindles spiral chute as far as possible will have that high intensity, (3) coal are not detained in chute, (4) have the way of speed limit, (5) easy to assemble.These problems are interrelated conflicting again, reach high strength easily as minor diameter, can under high rolling lead angle, be no more than the linear velocity of regulation, can not be detained again simultaneously, but it is contradictory with freight volume, as must dilated diameter under at large conveying quantity, the highlyest in the colliery defeated high-volume unload the hole at the bottom of three tons, discharging quantity can reach 10,000 tons/hour, this moment must be with major diameter spiral and dilated diameter must strengthen linear velocity under unequal angular velocity, thereby the practical method for limiting speed of a cover must be arranged again must be at dilated diameter the time, in order to address the above problem, go through the arduous exploitation in 4 years, carried out a large amount of theoretical derivation research, made 10 kinds of test apparatuses, surplus in the of expensive 20 ten thousand yuan, just finished above-mentioned research task.

To achieve these goals, the utility model has been taked following technical scheme;

The disjunctor double helix apparatus for delivering of a kind of minor diameter speed limiting easy to assemble is made of bracing frame, loading head, spiral chute.Spiral chute is a disjunctor double helix chute, and under the situation that satisfies transportation volume and lead track speed, the external diameter that its spiral size is a spiral is accomplished minimum, is series of products by the transportation size design in fact.Go up the breach oblong in the right section of spiral chute is, between conveyor screw chute and the bracing frame by being fixed on the guide rail on the bracing frame and being fixed on that slideway on the spiral chute connects.Each helical pitch of spiral chute is made of 1-4 section chute, and each section chute is inserted on the guide rail respectively and butt joint mutually.The effective external diameter of spiral chute is 0.2-1.4M, spiral internal diameter be external diameter ± 0.3 times.Chute by zero point right section width and highly respectively less than 0.5 times and 0.5 times of cosine of taking advantage of the spiral lead angle of helical pitch height of screw diameter, spiral lead angle α adopts high lead angle.When surpassing the speed of regulation along with the external diameter of spiral scraper-trough conveyer is increased to linear velocity, speed limit flaps speed limit is installed in the inside of chute for satisfying the transportation volume needs; When the attitude angle, position when rolling exceeds the effective section of chute or for keeping bulk cargo in certain limits the chute of shape, during rolling, the break-in flaps can be installed, the attitude angle, position when changing the bulk cargo rolling.When material is impregnated with foreign material, come also to be provided with between material and the tripper pest material scrubber.

Below specifically describe concrete scheme respectively:

Disjunctor double helix chute is that the bottom cut board of spiral chute joins together, the omnibearing line of chute base plate is to be a symmetrical broken line in the center of circle with the O point, it also can be the straight line that O is ordered, but space availability ratio is low, when if dynamic friction coefficient reduces with the speed increase between bulk cargo and chute, spiral rolling direction will be against the earth rotation direction, to offset the acceleration/accel effect that earth rotation was produced.Each section spiral chute will be fixed on the guide rail in order to the folding dress by slideway, generally causes few three guide rails and is beneficial to stressed well, is fixed by fixed card between each section spiral and guide rail, and double helix generally is that one of a spiral job is standby.Good in condition, when not needing standby spiral, can put simple helix as aboveground, the simple helix opposite is fixed with framing member and slideway, connects mutually with a vertical duct identical with spiral internal diameter between simple helix and framing member.

Bracing frame is that the bracing frame of steel structure is placed on feed bin central authorities, and feed bin one side or industrial building interlayer are provided in a side of reinforced concrete sandwich wall on coal bunker one sidewall to large-scale down-hole coal bunker bracing frame, and spiral chute is set between sandwich wall, opens on the sandwich wall and observes door and solar.So that understand rolling situation and lifting spiral, handle stifled storehouse accident.The rolling specified speed is the maximum line velocity Vp of material in the rolling process, is lower than the kinetic energy speed of putting piece material self fragmentation of failing.

High lead angle is that spiral lead angle α should be greater than the static friction angle of bulk cargo and chute, and for anthracitic spiral lead angle 45 degree of main use object (+10 degree ,-9 degree), it is the leading indicator of this device.Guarantee not retention in chute of bulk cargo, guarantee bulk cargo rolling in the rolling speed of regulation again,, when being 4m/S, can designing series one by freight volume requirements of different purposes and characteristics and overlap cherry coal rolling spiral lead angle as regulation lead track speed to softer lump coal.

The initial velocity producer of material is being the aggregate tube that a kind of vertical drop is arranged that produces specified speed Vp, material changes kinetic energy through moving vertically downward into by potential energy, produce the initial velocity of regulation by adjusting height vertically downward, in disjunctor double helix facility, its inside is the branch barrel that has cutting plate, this cutting plate can be with material to the feeding of chute first, can also be to the feeding of chute second, and can also be on demand simultaneously to the feeding of double-helical first, second chute.Vertical dimension Hp=K * the V that divides barrel _P ²/ 2 * g * m, K-1.2～1.5 break-in loss coefficients wherein, g-9.806m/s ²Acceleration due to gravity, the effective average velociity of Vp-m/s rolling, (is 4m/s to cherry coal), Vp should freely drop by coal cinder and fall that the piece test obtains.

Guide rail is the guide rail that play the guiding role that installs and fixes spiral chute.Guide rail has more than three, decide by screw diameter and the stressed size of spiral, screw diameter can be established three guide rails below 0.6M, more than the screw diameter 0.6M four guide rails, diameter is six more than 1.4M, the vertical layout of guide rail is beneficial to lifting, can also use lateral arrangement when being not suitable for vertical layout, and this moment, chute was that level is pulled out, packed into.

The speed limit flaps is located on chute interior nation plate and the base plate, vertical with the materials flow direction, be 90 degree～50 degree angles with nation's plate and base plate, it highly is by 1/2～1/4 of materials flow height, for reaching maximum speed limit requirement, each helical pitch is established 8～10, and design is the ratio at bulk cargo and chute frictional resistance coefficient and bulk cargo self internal friction coefficient to greatest extent, and it controls quick-acting fruits is to be reduced in the flaps number that is provided with in each helical pitch in proportion.

The break-in flaps is that underwall is provided with guiding flaps and edge break-in flaps in each chute; Be divided into guiding flaps and negative guiding flaps in the chute again, the positive break-in flaps in just leading flaps and edge, its effect is with materials flow guide chutes ippon one side, makes materials flow apparent place attitude angle steepening; With negative guiding flaps and contravariant when the flaps (also can not establish edge break-in flaps), its effect is with materials flow guide chutes inboard, make the materials flow material apparent place the attitude angle flattens slow, the angle that adds of guiding flaps and materials flow direction is spent between-130 degree 50,50 degree-90 degree are for just leading, and 90 degree-130 degree are negative guiding.Edge break-in flaps is a bent plate, and bent plate is terminal to be 30 degree-40 degree angles along the line with trough rim.Spiral internal diameter is that the chute of 0.1～-0.3 times of external diameter must be added with the break-in flaps, and break-in flaps end will surpass centre point to being not less than 0.1 times of external diameter.

The effect that is provided with pest material scrubber is often to infiltrate some harmful materials near former coal district, as plank and hammer drill etc., can block chute.Establish the chevron pointing setting gauge on the supplied materials level of supplied materials belt rectangular thing is dialled tiltedly, setting gauge is divided into feeding plate, and rectangular thing is skidded off outside the loading head, also establishes grate on loading head, especially big sorting can be gone out.

It is to be the exradius starting point with 0.2m for these technical scheme characteristics, for satisfying the radius of spin that the freight volume needs constantly increase; Way with adjusting the spiral lead angle both was not detained bulk cargo with high lead angle in the inside spin chute of storehouse, also will guarantee rolling speed within the limits prescribed; When the radius of spin is increased to the rolling speed that surpasses regulation, adjust rolling speed and attitude angle, position with the way that installs flaps additional, forms one and satisfy varying strength piece material guarantor block series product.

The enforcement of the utility model minor diameter speed limiting disjunctor easy to assemble double helix apparatus for delivering, the defeated problem of putting of the smokeless coal cinder charcoal that the solution quality is soft has been filled up aboveground cherry coal coal bunker down, implements a blank of speed limit rolling.Can better effects if for hard coal stone.To other coal, break degree into pieces owing to reduced to put in storage, reduced the bastard coal mixability, help screening, reduce the washing cost, improved the coal separation quality.Between industrial layers, in the building, use this spiral apparatus for delivering, except that reducing the lumpiness loss, also greatly reduce the distinctive huge noise emission of washery, protected workers'health.The economic benefit of this patent is also very considerable, and the piece rate causes few raising 10% additional income, and income is ten times of investment.

Description of drawings

Fig. 1 is that the disjunctor double helix is installed in the structural representation in the vertical storage bin;

Fig. 2 be the disjunctor double helix in vertical feed bin just at the dismounting vertical cross section;

Fig. 3 is disjunctor double helix transversal surface arrangement plan in vertical feed bin;

Fig. 4 is that the disjunctor double helix is being removed the wherein vertical cut-away schematic view of one section spiral with horizontal guide rail;

Fig. 5 is that the disjunctor double helix is being removed the wherein horizontal profile scheme drawing of one section spiral with horizontal guide rail;

Horizontal profile structure scheme drawing when Fig. 6 is disjunctor double helix usefulness steel bracing frame;

Fig. 7 is simple helix and guide rail slideway structure scheme drawing;

Fig. 8 is a disjunctor double helix chute right section scheme drawing; (a). (b).

Fig. 9 is a disjunctor double helix chute broken line base plate right section scheme drawing;

Figure 10 is provided with just lead flaps and each face expansion scheme drawing of edge break-in flaps chute in spiral chute;

Figure 11 establishes negative guiding flaps and edge contravariant to flaps in spiral chute, each face of chute launches scheme drawing;

Figure 12 is harmful material scrubber vertical cut-away schematic view;

Figure 13 is harmful material scrubber birds-eye view;

The embodiment explanation

As Fig. 1 and Figure 12 and shown in Figure 13, material belt 1 is over against the chevron pointing setting gauge 2 of removing harmful material, connects feeding plate 3 under in the setting gauge 2.If be impregnated with rectangular thing such as plank, hammer drill in the supplied materials,, can be dialled and tiltedly fall into feeding plate 3 and skid off outside the Material collecting box for harvesting 7 through chevron pointing setting gauge 2.Establishing grate 4 on the Material collecting box for harvesting 7 can select bulk materials.In the storehouse of no fragment machine driving surface, be provided with fragment anvil 5, on the anvil face that connects the piece material, establish can dismounting fragment pin 6, the fritter that is crashed is fallen in the feed bin 12.Bulk cargo after the sorting is through the speed V of sub-material cylindrical shell (8 ') normal acceleration to regulation _PAfter enter the spiral chute 9 of double helix, spiral chute 9 internal fixation have slideway 14, slideway 14 is plugged on the guide rail 10, guide rail 10 is fixed on bracing frame 11 or the reinforced concrete wall 13 through erecting frames 20, slideway 14 is fixed with card 21 and connects with guide rail 10.

Fig. 2 and Fig. 3 are that the disjunctor spiral uses vertical guide in vertical storehouse, particularly the deployment scenarios of down-hole coal bunker.The binning because down-hole humidity, bulk cargo must be sprinkled water in coal bunker, steel construction piece easily becomes rusty, and generally should adopt the exemplary configurations mode of bulkhead one side with the reinforced concrete sandwich wall.Fig. 2 represents that spiral lifts, and hole for hoist 15 is located at the middle and upper part of disjunctor spiral, and both sides are that reinforced concrete sandwich wall 13 sandwich walls are established observation door 16.During lifting, open fixed card 21 on the dismounting guide rail and hang up to hang and angle 22, suspension hook 22 is arranged in the solar, and ladder 23 and connection 17 are arranged in the solar, and water pipeline 18, illuminating line 19 be so that usefulness when handling stifled storehouse, solar external application steel plate 22 and built-in channel-section steel 25.

When Fig. 4, Fig. 5 represent that guide rail is horizontally disposed with, remove wherein and one save the scheme drawing that spiral represents to change the maintenance situation.

Fig. 6 is that disjunctor double helix scraper-trough conveyer adopts the steel structure bracing frame to arrange scheme drawing.Can be placed in vertical feed bin central authorities to spiral with this structure, also can be installed in the industrial building interlayer, can also lift defeated putting, be used for coal piling and entrucking ship.

Fig. 7 is the structural representation that interconnects as structure-steel framing with steel pipe between simple helix body and guide rail.It is low that this structure is used for freight volume, do not need timely cut-in stand-by spiral scraper-trough conveyer for ease of maintenaince, when needing simultaneously, can repack double helix into.

Fig. 8 is a disjunctor conveyor screw right section chute cross sectional drawing.Owing on planar view, be difficult to express the cross section that the right section of spiral chute is got high lead angle α (90-α), can be clearly seen that among this figure that the chute cross section is the interior unfilled corner oblong that goes up.Conveyor screw before present patent application is not to bias toward the inclined-plane rolling, thereby diameter dare not dwindle; Or bias toward screw motion thereby external diameter is very big.As be located at German scraper-trough conveyer on the bulkhead, because linear velocity Vp=R * ω, ω is a cireular frequency.Though the simple benefit of calculating is arranged like this, the very big inapplicable soft material of linear velocity is protected piece.The spirochetal internal diameter of present patent application can be O, even little arriving-0.3R, (R spiral external diameter, screw diameter are based on full screw motion for a short time and calculate and put into practice, just develop), what further explain is that when spiral internal diameter was O, the rolling length of bulk cargo in spiral was a high H of helical pitch, and effectively external diameter rolling length is L L=H/tg α, the bottom surface of spiral flatten just in time be one fan-shaped, bulk cargo flows in spiral, actual is bulk cargo secondary screw motion from inside to outside.The bulk cargo of general core can one slip to the end, because the core loss due to friction is little, and the speed height, the cause that radial centrifugal force is big, under certain condition even be in nearly same cireular frequency.Through full Section Design, behind break-in flaps or guiding flaps water conservancy diversion, can under less angular velocity difference, rolling be in a kind of controlled range, thereby the conveyor screw diameter of present patent application can do very little, the section degree of utilization is very high, generally can reach more than 60%, and former spiral section availability is failed high-volume greatly so present patent application can be accomplished minor diameter at 20-30%.Because the external diameter of spiral is channel steel shape, can bear the impulsive force of several kilotons when collapsing the storehouse, thereby can spiral be set in the high coal bunker of rice up to a hundred, arrange along overall height.

Show expression speed limit flaps 27 below Fig. 8, its square impact materials flow has the effect of cutting that necessarily rubs to piece material corner.Break-in flaps 30 among the figure, it is a kind of outer subtended angle less than the curved slabs of 40 degree, to the conveyor screw internal diameter less than 0.1R～-conveyor screw must be provided with the break-in flaps during 0.3R, flaps one end is located at the minimum diameter place, curved end will be stretched out 0.1R.

Fig. 9 is that disjunctor double helix chute is done base plate right section scheme drawing with broken line; Can increase the chute effective cross sectional area with the broken line base plate, this moment, the medial rotation footpath must be negative value, must establish edge break-in flaps, made the unlikely spiral that throws away of bulk cargo; Among the figure in the chute fine line represent normal circumstances materials flow secondary cycle direction.

Figure 10 is the expansion planar view that spiral nation, the end, interior nation only consider garden arc part, install the positive break-in flaps 31 of flaps 28 and edge that just leading in the chute additional, the situation of attitude angle, back bulk cargo position steepening, the contrary secondary cycle direction of materials flow flows, and is generally about 45% saturated flaps speed limit efficient is set.

Figure 11 is spiral nation, the end, interior nation expansion drawing; Dotted line is to launch the corresponding tie between the inside at the bottom of the nation of back, install the suitable secondary cycle direction of negative guiding flaps and edge contravariant materials flow behind flaps in the spiral additional, the mild situation of attitude angle, bulk cargo position θ degree, after negative saturated flaps was set, its speed limit efficient reached 55%.This seldom usefulness of flaps mode that adds, it can to a certain degree roll the garden with the piece material that looses, and materials flow becomes nearly horizontal flute profile.

Figure 12 and Figure 13 are the birds-eye view and the front views of the chevron pointing setting gauge 2 of harmful material scrubber, the existing narration of its principle of work (no longer repeating), install the chevron pointing setting gauge additional and only limit the first order and second stage coal bunker in the colliery, general second stage coal bunker only installs grate and supporting thing thereof additional, does not need to remove rectangular thing again.

Claims (9)

1, a kind of minor diameter speed limiting disjunctor easy to assemble double helix apparatus for delivering, by bracing frame (11), loading head (8), spiral chute (9) constitutes, it is characterized in that: spiral chute (9) is a disjunctor double helix chute, in being, goes up the right section of this chute the breach oblong, link by the slideway (14) that is fixed on the guide rail (10) on the bracing frame and be fixed on the spiral chute (9) between spiral chute and the bracing frame (11), each helical pitch of spiral chute is made of 1-4 section chute, and join together with the bottom cut board of spiral chute, each section chute is inserted on the guide rail respectively and butt joint mutually, the effective external diameter of spiral chute is 0.2-1.4m, spiral internal diameter is external diameter ± 0.3 times, chute by zero point right section width and highly respectively less than 0.5 times and 0.5 times of cosine of taking advantage of the spiral lead angle of helical pitch height of screw diameter, spiral lead angle α adopts high lead angle; Chute interior at double helix is equipped with speed limit flaps (27), is provided with pest material scrubber between material and the tripper.

2, minor diameter according to claim 1 speed limiting disjunctor easy to assemble double helix apparatus for delivering, it is characterized in that spiral chute can be provided with simple helix, the simple helix opposite is fixed with framing member and slideway, connects mutually with a vertical duct identical with spiral internal diameter between simple helix and framing member.

3, minor diameter according to claim 1 speed limiting disjunctor easy to assemble double helix apparatus for delivering, it is characterized in that described bracing frame (11) is that the bracing frame of steel structure is placed on feed bin central authorities, at the reinforced concrete sandwich wall (13) on coal bunker one sidewall, bracing frame is set between sandwich wall, has on the sandwich wall and observe door (16) and peripheral hardware solar (22).

4, minor diameter according to claim 1 speed limiting disjunctor easy to assemble double helix apparatus for delivering, it is characterized in that, spiral lead angle α should be greater than the static friction angle of bulk cargo and chute, and coal stone is that the spiral lead angle is 45 degree (+10 degree ,-90 degree), and lead track speed is 4M/S.

5, minor diameter according to claim 1 speed limiting disjunctor easy to assemble double helix apparatus for delivering is characterized in that being provided with cutting plate in aggregate tube (8), and cutting plate is controlled to the spiral sub-material, the vertical dimension Hp=KV of sub-material cylindrical shell _P ²/ 2gm, K-1.2～1.5 break-in loss coefficients wherein, g-9.806m/s ²Acceleration due to gravity, the effective average velociity of Vp-m/s rolling.

6, minor diameter according to claim 1 speed limiting disjunctor easy to assemble double helix apparatus for delivering is characterized in that the guide rail that play the guiding role that installs and fixes spiral chute has more than three, and spirochetal diameter can be established three guide rails below 0.6M; More than the spirochetal diameter 0.6M, can establish four, spirochetal diameter can be established six more than 1.4M, and the vertical layout of guide rail is beneficial to the chute level and pulls out, packs in order to lifting or lateral arrangement.

7, minor diameter according to claim 1 speed limiting disjunctor easy to assemble double helix apparatus for delivering, it is characterized in that speed limit flaps (27) is located on chute (9) inner nation plate and the base plate, be provided with the materials flow direction is vertical, it is 90 degree～50 degree angles with nation's plate and base plate, it highly is by 1/2～1/4 of materials flow height, requires each helical pitch to establish 8～10 for realizing maximum speed limit.

8, minor diameter according to claim 6 speed limiting disjunctor easy to assemble double helix apparatus for delivering is characterized in that being provided with in the double helix chute speed limit flaps (27) and can be divided into guiding flaps and edge break-in flaps; The guiding flaps can be divided into just leading flaps (28) and the positive break-in flaps in edge (31) and negative lead flaps (29) and contravariant again to flaps (32); Interior guiding flaps and materials flow direction angle are between 50 degree-130 degree, wherein 50 degree-90 degree are for just leading, 90 degree-140 degree are negative guiding, edge break-in flaps is a bent plate, bent plate is terminal to be 30 degree-40 degree angles along the line with trough rim, spiral internal diameter is equipped with break-in flaps (30) when being the chute of 0.1--0.3 times of external diameter, break-in flaps end will surpass centre point to being not less than 0.1 times of external diameter.

9, minor diameter according to claim 1 speed limiting disjunctor easy to assemble double helix apparatus for delivering, it is characterized in that harmful material scrubber includes on the supplied materials level of material belt (1) establishes herringbone setting gauge (2), setting gauge (2) has feeding plate (3), is provided with grate (4) on loading head (7).

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