CN87103206A - Large-scale horizontal screen extension set with two screen boxs - Google Patents

Abstract

The present invention relates to be with two screen boxs (2 arranged side by side, 3) large-scale horizontal screen extension set (1) screen box is done anti-phase circular swing by crank axle (15) and is driven, each screen box (2,3) or support or be suspended on swing element (4,5) on, and drive by two cranks (10) at least.When on each crank (10) a reverse rotation quality (22) being installed even also can keep clearly circular swing when then on one side product load being arranged, but the driving between two screen boxs (2,3) is implemented at the screen box end region.

Description

The present invention relates to a kind of large-scale horizontal screen extension sets with two arrangement screen boxs arranged side by side, it can do circular the swing by the driving of crank gear.

The present invention relates to large-scale horizontal screen extension set, large-scale screening system unit, wherein, be set up in parallel for example 2 to 4 screen boxs, it always contains 10 to 30 independent sieves.The dropping of large-scale screening machine is inserted highly considerable using in the cabinet as common chamber, i.e. 2 meters high orders of magnitude.Be equipped with on its opposite and be located in for example rock-ground large-scale sieve, and occupy a big base surface with few exceptions.High pendular body is under the situation that freely swings, and more smooth swing process has the very power of big difference relatively.In a kind of high swing process,, exist and wave active force in the face of turning power.This known large-scale horizontal screen extension set can be divided into following three kinds of special types:

-actual the device that freely swings

-rotary oscillation device

-crank-swinging device

Large-scale horizontal screen branch mailbox is swingingly even more, and then screening operation is unreasonable thinks, and the strength problem of material therefor is also just grasped than being easier to.

The large-scale horizontal screen extension set that uses is almost only used the device type that freely swings at present.Rotatablely move bringing at 0.5 to 1.0 ton swing weight of whole chest centers, then whole screening machine will remain on corresponding circular motion state as the unit of a sealing.The swing weight carries out real rotatablely moving, and casing is implemented (moving) motion irrotational, rotation as reverse quality.All horizontal screen extension sets almost are suspended on the elasticity rod of some without any exception, and are distributed in 4 some places.Hindering the horizontal screen extension set that is hung by elastic strip without any thing adopts by moving-mass and oppositely freely swinging of producing of the circulation of quality.

Try hard to realize a circular swing in the ordinary course of things, because only in this way could when each screening, guarantee uniform screening operation on the throughput direction arbitrarily.Each sieve can be at an arbitrary position gone up charging, and on any direction of always clashing into along screen box passage and screen box in opposite termination product is seen off.In fact main is when the load of each different casees chamber is asymmetric, not answer responsive.Even a good horizontal screen extension set when charging is asymmetric, also can keep good circle swing.

Known to the applicant, the large-scale horizontal screen extension set of crank-swinging mechanism no longer provides.A kind of traditional crank-swinging mechanism is described in Swiss Patent communique (CH-PS76937).The screen box of two arrangements arranged side by side that separate is made circus movement by a driving crank mechanism, and this crank mechanism places the centre of two screen boxs.Each screen box is provided with the guiding crank of two non-drivings.Each screen box is all made desirable circus movement in any position, does not also need the swing weight of adding.But great shortcoming is the rigidity guider of two screen boxs.Each biasing force and every kind of interference torque all must be born by these different crank devices.

Freely swing device have under the perturbed force situation can be during disturbing by changing a lower swing form a little or for example coming " avoiding " by displacement movement center laterally, the mistake load of noteworthy structural detail so just can not appear.In contrast, in the situation of crank-swinging device, will be local and peak load appears on this direction, for example only on a position of bearing.The concentrated load of uncontrollable part can cause bearing to damage prematurely mostly.The crank-swinging device of large-scale horizontal screen extension set can be described as a failure on this problem.Because oversize, this root problem can not be eliminated.At present, the principle of crank-swinging device also only with simple form, is applied on the small-sized screening machine.

The third type is the swinging wig-wag, and it has done elaboration in the DE-PS278815 patent specification.Wherein gyroaxis and driving shaft are arranged on the total centre of gravity place of two arranged side by side at a certain distance and horizontal screen branch mailboxes that be mutually permanently connected.Whether this solution can fundamentally find actual avenue still not known.It is inconceivable adopting this principle at present common big horizontal screen extension set, for example, because the centrifugal force that unsymmetrical load causes increases with effective spacing of relevant perturbed force to pivot with being directly proportional.Here existed the condition that the obstruction physical dimension of some system inherences increases substantially.

If more once these three kinds of horizontal screen extension sets just learn that every kind all has some advantages and some shortcomings.Now do following very rough contrast roughly.

-actual the device that freely swings can be applied to maximum sized situation, and guarantees that the life-span surpasses 10 years, but it a huge driving swing matter is arranged is this shortcoming.

-swinging wig-wag requires have additional mass balance, this principle can not be applied on the big horizontal screen extension set.

The wobble quality that-crank-swinging device neither needs to drive does not need mass balance yet.

The horizontal screen extension set of people expectation, its life-span will reach 15 to 20 years as above-mentioned, and primary be to turn round around the clock.It should bear the load condition of all actual appearance, makes each operating position all keep the motion of approximate circumference when product input has very big difference as much as possible again.

Task of the present invention is: avoid the defective of known solution teeth and nail, improve a kind of horizontal screen extension set with the anti-phase motion screen box, simultaneously, from actual needs, in the face of the current large-scale horizontal screen extension set that uses, should be able to increase the quantity of sieve arbitrarily.

According to solution of the present invention, it is characterized in that these screen boxs are supported by the element that freely swings, and have two driving cranks at least.

This new invention can prove the solution of the task of putting forward immediately by the most basic experiment mechanics.The horizontal screen extension set of being made up of two screen boxs of settling side by side is continuous service very reposefully.Compare with the horizontal screen extension set that freely swings, owing to cancelled uneven driving, overall weight descends.Special in further indicating: with the design of new solution with superior design concept, the advantages of three kinds of fundamental systems can be as much as possible describing during with beginning and has been avoided every kind of known disadvantage that type has in a horizontal screen extension set.When a side has product load, and oscillation system is very insensitive, and this feels surprised all participants.Reason is the real assembly by freely swing device and a rigidity crank driving mechanism relevant with two screen boxs that it relates to, so this horizontal screen extension set also plays the effect of the device that really freely swings.At this moment, can adjust circuit orbit from the overload position according to mass ratio self to the underloading position.Thus, computable mechanical load occurs, and related to the supporting position of case construction and axle.The local peak load of structural member is consistent with the known horizontal screen extension set that freely swings.To this,, surrounding environment is only applied a very little power by the practical function dynamic balance on all directions between two screen boxs.As what also will point out afterwards, this new solution route allows the size of unconfined increasing horizontal screen extension set in the feasible scope of prior art.Using the horizontal screen extension set of the pure device system manufacturing that freely swings also will strengthen than up to now, also is possible certainly.

The active force that can not compensate in the appearance of crank-swinging device instantaneous overload.This new invention is still used under the situation of this crank mechanism, then can be compensated and can not cause damage, because the horizontal screen extension set is the device that freely swings as a whole.The most important fact of this solution is: under the screen box situation of two anti-phase drivings of settling side by side, the center of gravity of two screen boxs is moved in same plane at least approx.

The invention provides different and useful especially design concept.The so-called double-crank that preferred plan is made up of two cranks.Double-crank can allow always two position transfer function power.When these two driving cranks, when all respectively having a reverse rotation quality, will be superior especially.Show by this neoteric practice: the large-scale horizontal screen extension set that is in operation has very stable swing state.But two screen boxs have the oval-shaped swing mode that is similar under extreme case, and this is because two inverted wobbles screen boxs have not the result of the moment of reaction of counteracting fully.Each screen box all self is determined a turning moment.This torque can compensate by two reverse rotation quality, so the plansifter machine turns round still steadily.

It is shocking very much: this new invention has been used the reverse rotation quality, and first large-scale horizontal screen extension set is bearing on the element that freely swings.Wherein, each of two screen boxs under the situation of correctly selecting the reverse rotation quality for use, just can be swung on a circuit orbit almost completely.Owing to when load on one side reduces the swing circle of a screen box, the swing circle of another screen box is correspondingly strengthened.So this swing state just no longer depends on whether screen box is underslung or supporting type.Produced new advantage thus, above the horizontal screen extension set, become and do not covered in order to hang needed carrying.In a plurality of situations that grind setting, even lid can be saved.The swing active force just acts on the base anchor.

Preferably the reverse rotation quality directly is fixed on the crank as unbalance mass,, simultaneously they is placed in like this on two cranks, that is, making with joint efforts, the direction of directed in opposite becomes 180 ° ± 15 °.Possible is, is placed in the upper area of horizontal screen extension set to the part of major general's reverse rotation quality, and another part is placed in the lower area of horizontal screen extension set, and/or so constitute crank itself, so that they become the part of reverse rotation quality.This superior enforcement structure can make the swing circle of two screen boxs not only can control but also can change, even under unequal product load condition, also can realize identical pendular ring.This realizes by changing one ± 15 ° values of angle ε.

What be particularly suitable for purpose is at the drive motors of horizontal screen extension set upper area or lower region thereof, from floor plan, to be the center that is placed in the horizontal screen extension set.

For both simplified structures is considered stability again, further suggestion: allow active force import to the upper area and the lower area of two screen boxs from crank axle.Secondly two driving cranks are placed in the middle case end regions of two screen boxs.Parts are all harmonious in addition in order to make all, should select the theoretical swing circle diameter of two accumulation groups identical in quality.

Each screen box can support by the element that freely swings.As mentioned above, this just further discloses the organization plan of complete novelty.The pulverising apparatus of complete arrangement on the stratum only, that need not hang additional expensively just can build simplifiedly.With regard to triage techniques, when each screen box was suspended on the element that freely swings, this also was the solution of an equivalence.In two kinds of situations, preferably should be to each screen box with the component positioning that freely swings four outer end region, like this, each screen box all is rendered as a swing unit that independently can turn round.This is just provided a stable swing state, and simplified assembling and any possible services, supported oneself because a part can be used for itself.

A kind of further superior especially form of implementation is that the element that freely swings is made the rubber spring cruciform joint of taking back multiple moment, and they are mutual tensionings when work and inactive state, and at this moment the size of stretching preferably approximates the wheelbase of crank journal.

Further describe details of the present invention below:

Fig. 1 represents: the perspective view of a large-scale horizontal screen extension set

Fig. 2 represents: the enlarged drawing of swash drive among Fig. 1

Fig. 3 a to 3d represents: four positions of the screen box of a complete pendular ring

Fig. 4 a to 4d represents: as Fig. 3 describes, but the additional unbalance mass, of band

Fig. 5 represents: the further details of the structure of Fig. 1 and tool.

That now relate in order is Fig. 1 and Fig. 2, and a large-scale horizontal screen extension set 1 is made up of a left screen box and a right screen box.Each screen box all is supported on separately 4 elements 4 that freely swing.The element 4 that freely swings can be any known cardan joints support or articulated system, elephant " Rosta " element for example, and it had both allowed to do rotary oscillation freely, supported the weight of each screen box 2 and 3 again simultaneously.As either-or scheme, can support or the articulated system without universal joint, and each screen box 2 and 3 is suspended on traditional elastics wing band, for example on the sea pipe bar bundle 5 as described in Figure 1.Dual mode all allows each screen box 2 and 3 to have free activity, as long as they are not connected by a swash drive.This swash drive 6 regularity according to strictness as follows produce swing, and however, plansifter machine 1 obviously has the ability of freely swinging as a whole, as known as the large-scale plansifter machine of an integral hanging on swing bar bundle 5.This fact is the most basic for this new invention.Swash drive 6 is to carry out work by a common drive motors 7, promptly passes through driving-belt 8 to drive 9 from motor, and this is taken turns 9 usefulness chains and directly is fixed on the crank 10.Crank 10 has one and goes up axle journal 11, and it is supporting drive 9, and is placed on the carriage 12 of screen box 3.Following axle journal 13 is installed in the corresponding support 14, and similarly is connected with screen box 3.Crank axle 15 goes up attachment strap 16 by one and a following attachment strap 17 has been formed crank 10 with axle journal 11 and 13 together, and has therefore constituted double-crank.In addition, crank axle 15 also has one to go up rolling bearing 18, and it is fixedlyed connected with second screen box 2 by bracket 19.Correspondingly also have a following rolling bearing 20 similarly to be fixed on the screen box 2 by bottom bracket 21.

In Fig. 3 a to 3d, described crank axle 15 transposition differences and be four positions of 90 °, and the relevant position of two screen boxs 2 and 3.Axle X-X draws as motionless reference standard shaft.F represents the direction of the effective driving force for screen box 2 and 3 at that time.Couple F _2a/ F _3aAlways direction is antipodal.When these two power F sizes are identical, then cancel out each other in this power of each position of screen box.At least in theory can make each screen box carry out an approximate rotary oscillation by this way.Practice shows that some factors may be to cause screen box 2 and 3 to depart from circular, fashion and the inducement of swinging.Surprisingly: resonance can be by couple F in the time of each reverse rotation quality 22 and each crank 10 ₂/ F ₃The moment of remnants compensates.Reverse rotation quality 22 be by on set a roof beam in place 23 and set a roof beam in place down and 24 be 90 ° ± 15 ° angle with attachment strap 16 and 17 and be connected with crank axle 15.According to the purpose needs, fix on the axle journal of crank axle 15 by the indexable ground two of 23,24 the locking device of setting a roof beam in place, because so just allow relative crankshaft center line to adjust various angle position.

For the uneven weight on the collocation structure, also can add upward a counterpoise 25 and a following counterpoise 26 with the reverse rotation quality 22 that solid shafting constitutes.

Fig. 4 a to 4d has described synthetic couple (F _4a-F _4d), be similar to Fig. 3 a to 3d.Learn from Fig. 4, correctly selecting under the situation of unbalance mass, 22, no matter oscillatory forces or consequent moment are not compensated with all can having residue.

In the large-scale plansifter machine of describing in Fig. 11, each screen box (2,3) all respectively has 4 sieve chambers 30.The door of sieve chamber 33 has been removed, and can recognize it thus has 25 folded mutually up and down screen frames of settling 34.The kinds of goods of sending into screening 35 carry out by entering the mouth, and at this moment, for each screen box one to four inlet are set, and similarly also have several outlets, but do not draw.Product is sent into each sieve chamber or screen frame group, is to be undertaken by the pipe-line system of not drawing.Based on such fact, in a large-scale plansifter machine,, can produce different product accumulations, and therefore the uneven weight of swing process take place for the different moment.

The practice that has the large-scale plansifter machine of a pair of uneven weight shows: this compares two screen boxs when being extreme uneven weight in two screen boxs, the swing that always can keep complete sub-circular, this moment, the screen box of heavy duty was drawn a less circuit orbit owing to overweight relation.But two swing radius of a circle sums always keep constant, and and the twice size " Z " of crank bending motion be consistent.

That describes in Fig. 5 is the superior especially enforcement version of support and linkage system.Each of four elements that freely swing is formed by following element: two rubber spring cruciform joints, a top rubber spring cruciform joint 40, it upwards is connected with 3 with each screen box 2 respectively rigidly, an intermediate supports 42 and a bottom rubber spring cruciform joint 41, it is fixed on the base plate.Two rubber spring cruciform joints of intermediate supports 42 connections this moment, thus constitute a real element 4 that freely swings.

Rubber spring cruciform joint (40,41) is known version, as disclosed by the open communique DE-OS2917368 of West Germany, has been adopted whole relevant contents here.

Can recognize now that according to the present invention " achievement secret " is not to be to use the rubber spring cruciform joint with restoring moment, but be by two screen boxs 2 and 3 be parallel to each other separately make the tensioning of rubber spring cruciform joint, cause two freely swing accordingly element for example 4 ' and 4 "; though static still in running status; with respect to its center axis of oscillation 43 ' reach 43 ", Zong only form a little angle [alpha].To go up spacing B when being preferably in assembling and will amplify a size " Z " with respect to following spacing A, that is, and the wheelbase of crank journal.When two screen box swings, angle [alpha] all remains unchanged at an arbitrary position.Causing two screen boxs thus is to swing on a horizontal plane really, and has a very powerful swing additional maintenance power obviously to be presented in the desirable swing loop to screen box, Gu the tendency of this oscillating motion has just almost been eliminated.

At least based on the experience of using traditional suspension type plansifter machine, use has further good effect in the earthquake territory, because new solution can be born stronger vibrations, and by in the also suitable corresponding building structure of the optimal support on the base.

According to the present invention, freely swing the plansifter machine that supports can be steadily after big advantage is to connect drive motors through 5 seconds and be rotated in unchangeably on the swing circle diameter, and concerning the known structure that freely swings, approximately continue just can reach stably in 6 to 10 minutes and be circulated on the swing diameter.Secondly according to plansifter machine of the present invention, after turning off drive motors, also can be in favourable state, because this horizontal screen extension set is just static following after 8 seconds.

Departing from when decelerating to inactive state of swing circle increases by 40% approximately, and in contrast to this, the increase that the swing of traditional plansifter machine that freely swings departs from approximately can reach 2.5 times.

Claims (15)

1, having two settles large-scale its screen box of horizontal screen extension set of screen box can carry out anti-phase circle swing by crank gear side by side, it is characterized in that screen box (2,3) be supported on the element that freely swings (4,5), and have two driving cranks (10) at least.

According to the large-scale plansifter machine of claim 1, it is characterized in that 2, these two cranks (10) are made double crank type.

3, according to the large-scale plansifter machine of claim 1 and 2, each that it is characterized in that two driving cranks (10) all has a reverse rotation quality (22).

4, according to claim 1,2 or 3 large-scale horizontal screen extension set, it is characterized in that reverse rotation quality (22) directly is fixed on the crank (10) as unbalance mass.

5, according to the large-scale plansifter machine of one of claim 2 to 4, it is characterized in that installing reverse rotation quality (22) on two cranks (10), make that synthetic moment is just in time anti-phase in the turning moment of screen box (2,3).

According to the large-scale plansifter machine of one of claim 1 to 5, it is characterized in that 6, the part of reverse rotation quality at least (22) weight (25) by way of compensation is installed in the upper area of plansifter, a part is installed in the lower area of plansifter.

According to the large-scale plansifter machine of one of claim 1 or claim 2 to 6, it is characterized in that 7, drive motors (7) is total on one that is fixedly mounted in the screen box (2,3) with putting.

8,, it is characterized in that no matter drive motors (7) is mounted in the top of plansifter or is installed in the bottom of plansifter, but see it is the center that is positioned at horizontal screen from floor plan according to the large-scale plansifter machine of claim 7.

9, according to the large-scale horizontal screen extension set one of in the claim 1 to 8, it is characterized in that, from crank (10) power is passed to two screen boxs (2,3) and carry out at casing upper area and lower box zone.

10, according to the large-scale plansifter machine one of in claim 1 or the claim 2 to 9, it is characterized in that two the driven cranks (10) between two screen boxs (2,3) are placed in the screen box end region.

11, according to the large-scale plansifter machine of one of claim 3 to 5, it is characterized in that make peace the greatly theoretical swing circle equal diameters of two screen boxs identical in quality (2,3) of the wheelbase of crank journal " Z ".

12,, it is characterized in that each screen box (2,3) is supported on the element that freely swings according to the large-scale plansifter machine of one of claim 1 or 2 to 11.

13,, it is characterized in that each screen box (2,3) has swing unit that service ability is independently arranged of each screen box of the element of freely swinging (4,5) (2,3) expression four outer rim corners according to the large-scale plansifter machine of claim 12 or 13.

14, according to the large-scale plansifter machine of one of claim 12 to 14, the element that it is characterized in that freely swinging is to be made of the rubber spring cruciform joint (40,41) with restoring moment, and it reaches inactive state at work is mutual tensioning.

According to the large-scale plansifter machine of claim 15, it is characterized in that 15, the size of tensioning is equivalent to wheelbase " Z " approximately.

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