CN209663724U - A kind of coal screening testing machine convenient for classification - Google Patents

Abstract

The utility model relates to coal screening field more particularly to a kind of coal screening testing machines convenient for classification comprising the components such as sieve, catch tray, draining machine structure；In draining machine structure, by the way that multilayer remaining device and multiple heating devices are arranged in shell, on the one hand control water is carried out to coal to be sieved using heating device, on the other hand the stop plate and elastic component passed through in remaining device increases the coal residence time, reach qualified control water effect, solve the problems, such as that coal assembles that influence screening effect suitable for the mixing coal sample sieve test of size granularity be a new architecture for meeting state coal sieve test technical requirements because moisture is excessively high.

Description

A kind of coal screening testing machine convenient for classification

Technical field

The utility model relates to coal field more particularly to a kind of coal screening testing machines convenient for classification.

Background technique

Coal screening test is to measure a kind of basic skills of coal granularmetric composition and each grade quality.It is tried by screening It tests, it may be appreciated that the qualitative character of production the block rate and size fractionated coal in each production coal seam.Gained screening data is rationally to utilize coal Resource formulates the important evidence of coal product quality standard.And sieving is then that coal screening tests most important operation link, it It is the method that coal sample is classified by the size of granularity using the sieve of different pore size.

Therefore it in the experiment of actual coal screening, needs simultaneously to sieve multistage coal, and coal to be sieved Surface is easy to glue various viscous mineral matter and moisture is higher, not only the dimensions of influence coal but also close with sieve net diameter Coal can assemble on sieve, increase difficulty and the time of screening.

Meanwhile in long-term screening process, can also mesh size be become smaller, influence grading effect,

A kind of coal screening device of Publication No. CN208340920U, including the rotation of shell, baffle plate, level-one feed surge Ask roller, second level feed surge rotary carrier roller, rotary shaft, rotating wheel of pulley teeth etc., and bottom is equipped with bulky grain discharge port and small Particle discharge port；Two inner walls of shell are disposed with the level-one feed surge rotary carrier roller of arranged askew, second level from top to bottom Feed surge rotary carrier roller and multiple rotary shafts are equipped with the rotating wheel and one-to-one correspondence of multiple pulley teeths in each rotary shaft side by side Ladder-like sieve plate.

Although utility model sieve accelerates coal screening, because coal can be made in screening process by being equipped with rotating wheel At a degree of destruction, screen experiments can not be applied to.

Utility model content

The purpose of this utility model is to provide a kind of coal screening testing machines convenient for classification, to alleviate in the prior art The technical problem of coal screening inconvenience.

The utility model provides a kind of coal screening testing machine convenient for classification, comprising:

Sieve；

Bracket；

The coal screening testing machine further includes draining machine structure；

The draining machine structure includes:

The penetrating shell in both ends, rack-mount, coal enters from one end of shell, that is, input port, and from shell The other end, that is, delivery outlet is exported to sieve；

Multilayer remaining device is arranged from one end hierarchical of shell to the other end of shell, each layer of remaining device packet Two stop components of axial symmetry setting are included, each stop component includes stopping plate, rotation axis, arc chute, arc shaped slider, bullet Property part；Elastic component is housed in arc chute, and one end of elastic component is fixed on the inner wall of arc chute；Stop one end of plate It is fixed on the inner wall of the housing by rotation axis rotary type；One end of arc shaped slider is fixed on the bottom for stopping the other end of plate On, the other end of arc shaped slider is inserted in arc chute and penetrating one end of arc chute, and another with elastic component End is fixed；The other end of arc chute is fixed on the inner wall of the housing and positioned at the lower section for stopping plate；It stops plate and passes through elastic component It is used to stop the coal entered from shell input port to the support of arc shaped slider, and is more than elastic component in the coal weight of accumulation Support force when tilt down and be transferred to coal on the stop plate of next layer of remaining device；

Multiple heating devices are respectively mounted on the inner wall of the housing, and each layer of remaining device is close to the one of shell input port Side, which is laid out, at least one described heating device.

Further, the coal screening testing machine further include:

Driving mechanism is used to drive sieve with respect to bracket activity with the coal on sieving screen mesh.

Further, transverse type before and after the driving mechanism driving sieve is in the arc line type reciprocating movement of left and right simultaneously It moves back and forth；

The driving mechanism includes:

Clamp mechanism one is driven, is used to that transverse type before and after sieve to be driven to move back and forth；

Clamp mechanism two is driven, is used to that sieve or so arc line type to be driven to move back and forth.

Further,

The driving clamp mechanism one includes:

Fixed link, one end are fixing end, and opposite other end is free end, and the fixing end is fixed on bracket；

Half gear, have two semicircular profiles being oppositely arranged, the joint face of the described two semicircular profiles of connection, It is provided with the face of gear of rack gear；Half gear is covered on the free end by described two semicircular profiles, and sieve 1 is fixed on institute It states on joint face；

Two connection straps, one end are each attached to above half gear on the side of the free end；

Disk, one side are fixed on the other end of two connection straps；

Hydraulic telescopic rod, is fixed on bracket and its telescopic end is inserted in disk from the opposite other side of disk, and One is fixed on the telescopic end, and the telescopic end is limited into the limited block in disk；

Wherein, hydraulic telescopic rod pushes disk to drive half gear to stretch along the free end, and passes through the limited block It pulls disk to drive half gear to retract along the free end, realizes that half gear transverse type before and after the free end back and forth moves It is dynamic.

Further,

The driving clamp mechanism two includes:

Servo motor is fixed on bracket；

Gear is engaged with the face of gear of half gear；

Wherein, servo motor drives half gear accordingly to move by driving gear or so arc line type reciprocating rotary.

Further, the heating device is drying lamp；Elastic component is spring.

Further, the coal screening testing machine further include:

Four piece of first breast board is fixed with sieve and forms screening slot towards the delivery outlet, between every piece of first breast board It is fixed by hasp, the first lateral breast board is fixed with sieve, and the first longitudinal breast board and sieve are rotated by the second rotation axis Connection；

Four piece of second breast board is fixed with catch tray and forms collecting tank towards the delivery outlet, every piece of second breast board it Between fixed by the second hasp, the second lateral breast board is fixed with catch tray, and the second longitudinal breast board and catch tray pass through third Rotation axis rotation connection.

Further, that one end being inserted in arc chute on arc shaped slider is provided with limitation arc shaped slider and is detached from arc The limiting section of sliding slot.

Further, the bracket is for being connected and fixed catch tray, draining machine structure and driving mechanism；

The bracket includes:

Two connecting rods, it is horizontally-parallel arrangement and one end fixed with catch tray, opposite other end is fixed on draining machine On structure；The fixing end of fixed link is fixed in connecting rod；

Two support frames, it is horizontally-parallel arrangement and one end fixed with catch tray, opposite other end is fixed with ground；

Protective shell is arranged in the middle part of catch tray and is internally provided with the driving clamp mechanism two, the inner wall of protective shell It is fixed with servo motor；

L shape connecting rod, one end of which is fixed on protective shell, opposite other end is fixed with hydraulic telescopic rod.

Further, the coal screening testing machine further include:

" ten " font plate, is arranged in the middle part of sieve, and the joint face of half gear is fixed on " ten " font plate；

Catch tray is used to collect the coal after sieve sieves；

No less than one pulley, fixing end are fixed with half gear, and the tooth socket of sliding end and gear is tangent.

The utility model has the following beneficial effects:

Firstly, the emplastic on coal surface influences screening precision, and the utility model is set for the problem that in the prior art There is draining machine structure, by being equipped with multilayer remaining device and multiple heating devices, on the one hand can reduce the moisture on coal surface Promote stickum separation, on the one hand the formation of coal layer when avoiding sieving increases coal in pretreatment portion by stopping plate Residence time increases the control water time, improves control water effect.

Secondly, in the prior art, screening mode is single, coal can be assembled to increase screening difficulty on sieve Problem, the utility model drives sieve in the arc line type reciprocating movement of left and right by driving mechanism while front and back transverse type is past It is multiple mobile, it is sieved using reciprocal, Vibration Synchronization, prevents the coal layer formed in one-way movement, improve screening efficiency and precision.

Finally, half gear tooth tip is equipped with multiple pulleys, the frictional force of half gear and gear when reducing screen movement increases The flexibility of testing machine, meanwhile, limit its direction of motion, stability when guarantee test machine sieves.

Detailed description of the invention

It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art Under the premise of labour, it is also possible to obtain other drawings based on these drawings.

Fig. 1 is testing machine structure schematic diagram provided by the embodiment of the utility model；

Fig. 2 is draining machine structure cut away view provided by the embodiment of the utility model；

Fig. 3 is the schematic enlarged-scale view of the utility model part A；

Fig. 4 is sieve provided by the embodiment of the utility model and the structural representation for driving connection relationship between clamp mechanism one Figure；

Fig. 5 is driving clamp mechanism one provided by the embodiment of the utility model and the knot for driving connection relationship between clamp mechanism two Structure schematic diagram；

Primary symbols explanation: 1- sieve；The first breast board of 11-；12- " ten " font plate；2- catch tray；The second breast board of 21-； 3- bracket；31- connecting rod；32- support frame；33- protective shell；34-L shape connecting rod；4- shell；5- remaining device；51- is stopped Plate；52- rotation axis；53- arc chute；54- arc shaped slider；541- limiting section；55- elastic component；6- heating device；7- driving Clamp mechanism one；71- fixed link；72- hydraulic telescopic rod；Half gear of 73-；731- pulley；74- connection strap；75- disk；8- driving Clamp mechanism two；81- servo motor；82- drives gear.

Specific embodiment

The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally Field those of ordinary skill every other embodiment obtained without making creative work belongs to practical Novel protected range.

Present embodiments provide a kind of coal screening testing machine convenient for classification.As shown in Figure 1, coal screening testing machine packet Include 1, four piece of first breast board 11 of sieve, " ten " font plate 12, four piece of second breast board 21, catch tray 2, bracket 3, draining machine structure, drive Motivation structure, specific structure are as follows:

Sieve 1 general filter diameter biggish impurity or the coal pieces that are relatively large in diameter for sieving to coal.Sieve There are many sieve pore, the aperture of sieve pore is not particularly limited the setting of net 1, can follow the sieve pore of actual needs setting respective aperture. In order to enhance the service life of sieve 1, sieve 1 can be using sieve made of metal.

To reduce sieve 1 in screening process, the coal on sieve falls the problem of reducing experiment accuracy from surrounding, this Embodiment is provided with the first breast board 11 in the side of sieve 1, and the first breast board 11 connect with sieve 1 and formed screening slot, In When carrying out screening movement by sieve 1, the first breast board 11 can limit the coal in screening.Meanwhile every piece of first breast board It is fixed between 11 by hasp, lateral first breast board 11 and sieve 1 are fixed, and the first longitudinal breast board 11 and sieve 1 pass through the The rotation connection of two rotation axis, after screening, can unlock hasp, and rotate the first longitudinal breast board 11 downwards, facilitate reality Test the online coal of personnel's collection screen.

In other embodiments, the first breast board 11 can be not provided with, and can reach screening effect using sieve 1.

In the present embodiment, the middle part of sieve 2 is additionally provided with " ten " font plate 12, and sieve 1 can be prevented in screening, Cinder is fallen around driving mechanism, to influence the accuracy of experimental result, " ten " font plate 12 in other embodiments It can be not provided with.

Since in the present embodiment, sieve 1 is to be sieved, be classified to the coal of different size, so needing catch tray Coal after 2 pairs of screenings is collected.Certainly, in other embodiments, catch tray 2 can be replaced using plastic film, even Catch tray 2 can also be not provided with, and be operated on clean bottom surface.

Also, the present embodiment is provided with the second breast board 21 in the side of catch tray 2, passes through between every piece of second breast board 21 Second hasp is fixed, and the second lateral breast board 21 and catch tray 2 are fixed, and the second longitudinal breast board 21 passes through third with catch tray 2 Rotation axis rotation connection.Therefore, after screening, the second hasp can be unlocked, and rotates the second longitudinal breast board 21 downwards, Experimenter is facilitated to collect the coal on catch tray 2.

In other embodiments, the second breast board 21 can be not provided with, and can be carried out to the coal after screening using catch tray 2 Screening.

Bracket 3 is for being connected and fixed catch tray 2, draining machine structure and driving mechanism comprising: two connecting rods 31, two A support frame 32, protective shell 33, L shape connecting rod 34.Two support frames 32, horizontally-parallel arrangement and one end and catch tray 2 are consolidated Fixed, opposite other end is fixed with ground.The middle part of catch tray 2 is arranged in protective shell 33.L shape connecting rod 34, One end and the outer end of protective shell 33 are fixed.

Draining machine structure can carry out a degree of control water to coal to be fractionated, as shown in Fig. 2, draining machine structure includes two Hold penetrating shell 4, multilayer remaining device 5, multiple heating devices 6.

The penetrating shell 4 in both ends is fixedly connected by the connecting rod 31 of two horizontally-parallel arrangements with catch tray 2, to The coal of screening enters from one end of shell 4, that is, input port, and exports from the other end, that is, delivery outlet of shell 4 to sieve 1.

Multilayer remaining device 5, for increasing control water time of the coal in draining machine structure, from one end level of shell 4 Formula is arranged to the other end of shell 4, and each layer of remaining device includes two stop components of axial symmetry setting.Wherein, Mei Geting Staying component includes stopping plate 51, rotation axis 52, arc chute 53, arc shaped slider 54, limiting section 541, elastic component 55.Such as Fig. 3 institute Show, spring is housed in arc chute 53, and one end of spring is fixed on the inner wall of arc chute 53.As shown in Fig. 2, stopping One end of plate 51 is fixed on the inner wall of shell 4 by 52 rotary type of rotation axis；One end of arc shaped slider 54 is fixed on stop plate On the bottom of 51 other end, the other end of arc shaped slider 54 is inserted in arc chute and penetrating one end of arc chute 53 In 53, and fixed by limiting section 541 and the other end of spring；The other end of arc chute 53 is fixed on the inner wall of shell 4 And it is located at the lower section for stopping plate 51.

In use, will fall off on the stop plate 51 of axial symmetry setting after coal enters shell 4 by input port, stop Plate 51 is used to stop coal by spring to the support of arc shaped slider 54, with the gradually accumulation of coal, more than the branch of spring When support force, 54 compressed spring of arc shaped slider will be controlled by stopping plate 51, while be slided along arc chute 53, and the final plate 51 that stops will It tilts down, and coal is transferred on the stop plate 51 of next layer of remaining device 5, until coal to be sieved is by shell 4 Delivery outlet is fallen into sieve 1.Behind coal to be sieved all investment shell 4, a small amount of coal residue is stopped if stopping on plate 51, Experimenter can directly manual or straight-bar for public use press downwards to stopping plate 51, outside auxiliary residue discharge shell 4.

Elastic component 55 is that spring can also pass through other elastic elements such as spring leaf in other embodiments in the present embodiment It is replaced, to reach identical technical effect.

Multiple heating devices 6, are installed on the inner wall of shell 4, and each layer of remaining device 5 is close to 4 input port of shell Side be laid out and have at least one heating device 6.In use, drying lamp will continue when coal is rested on and stopped on plate 51 Control water is carried out to coal, to reduce the viscosity on coal surface, and in subsequent screening, the formation of coal difficulty screen layers is reduced, improves Screening efficiency.

Heating device 6 is drying lamp in the present embodiment, and heating lamp etc. can be selected in other embodiments has same technique The component of effect replaces.

Driving mechanism can drive sieve for driving sieve 1 with respect to 3 activity of bracket with the coal on sieving screen mesh 1 Front and back transverse type moves back and forth net 1 simultaneously in the arc line type reciprocating movement of left and right comprising driving clamp mechanism 1, driving Clamp mechanism 28.

Driving clamp mechanism 1 is for driving 1 front and back transverse type of sieve to move back and forth.As shown in figure 4, driving clamp mechanism 1 Including fixed link 71, hydraulic telescopic rod 72, half gear 73, no less than one pulley 731, two connection straps 74 and disks 75。

One end of fixed link 71 is fixing end, and opposite other end is free end, and fixed link 71 is moved as 1 transverse type of sieve Dynamic guide rail, fixing end are fixed in ipsilateral connecting rod 31.Half gear 73 has the semicircle side of two be oppositely arranged Face, the joint face for connecting two semicircular profiles, the face of gear for being provided with rack gear；Half gear 73 passes through two semicircular profiles sets On free end, sieve 1 is fixed on joint face.Two connection straps 74, one end are each attached to half gear 73 above to freedom On the side at end.Disk 75, one side are fixed on the other end of two connection straps 74.Hydraulic telescopic rod 72, is fixed on L On the other end of shape connecting rod 34, and the telescopic end of hydraulic telescopic rod 72 is inserted in disk 75 from the opposite other side of disk 75 It is interior, and fix one on telescopic end and telescopic end is limited into the limited block in disk 75.

In use, hydraulic telescopic rod 72 pushes disk 75 to drive half gear 73 to stretch along free end, and pass through limited block Disk 75 is pulled to drive half gear 73 to retract along free end, realizes that half gear 73 is moved back and forth along transverse type before and after free end, To realize that the transverse type of sieve 1 moves back and forth.

In the present embodiment, the tooth tip of half gear 73 is provided with no less than one pulley 731, fixing end and half gear 73 is fixed, can reduce frictional force of half gear 73 in transverse type moving process, can not add in other embodiments.

Clamp mechanism 28 is driven, is used to that 1 or so arc line type of sieve to be driven to move back and forth and be arranged in protective shell 33.Such as Shown in Fig. 5, driving clamp mechanism 28 includes servo motor 81, gear 82.Servo motor 81 is fixed in protective shell 33.Gear 82, it is engaged with the face of gear of half gear 73, the sliding end of pulley 731 and the tooth socket of gear 82 are tangent and be only capable of sliding laterally, By adding pulley 731, frictional force of the sieve 1 in transverse movement can be reduced, to increase the flexibility of testing machine and make Use the time limit.Wherein, servo motor 81 drives half gear 73 accordingly mobile by driving 82 or so arc line type reciprocating rotary of gear.

In use, the coal after controlling water will sieve on sieve 1, on the one hand, servo motor 81 is by sliding tooth 82 or so arc line type reciprocating rotaries are taken turns, since gear 82 is engaged with the face of gear of half gear 73, half gear, 73 phase will be driven It should move to realize that sieve 1 sieves coal under the reciprocating movement of left and right arc line type.On the other hand, existing in order to solve In technology, the problem of single screening mode difficult screen layers easy to form, the present embodiment drives 75 band of disk by hydraulic telescopic rod 72 Dynamic half gear 73 slides laterally in fixed link 71 while left and right arc line type moves along gear 82, to realize in left and right Front and back transverse type moves back and forth simultaneously in arc line type reciprocating movement, using dual screening mode, can break difficult screen layers simultaneously Generating layer gap, the coal for enabling diameter to be less than 1 aperture of sieve pass through layer gap, realize quickly screening.

It in other embodiments, can be by manually rocking instead of the driving mechanism in the present embodiment, to reach point of coal Layer effect.

In the description of the present invention, it should be noted that the orientation or positional relationship of the instructions such as term "inner", "outside" To be based on the orientation or positional relationship shown in the drawings, it is merely for convenience of describing the present invention and simplifying the description, without referring to Show or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot manage Solution is limitations of the present invention.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary, It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition The concrete meaning of language in the present invention.

Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited System；Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should Understand: it is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of Technical characteristic is equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and this is practical new The range of each embodiment technical solution of type.

Claims (10)

1. a kind of coal screening testing machine convenient for classification, comprising:

Sieve (1)；

Bracket (3)；

It is characterized in that, the coal screening testing machine further includes draining machine structure；

The draining machine structure includes:

The penetrating shell in both ends (4) is mounted on bracket (3), and coal enters from one end of shell (4), that is, input port, and from The other end, that is, delivery outlet of shell (4) is exported on sieve (1)；

Multilayer remaining device (5) is arranged from one end hierarchical of shell (4) to the other end of shell (4), each layer of stop dress Two stop components including axial symmetry setting are set, each stop component includes stopping plate (51), rotation axis (52), arc chute (53), arc shaped slider (54), elastic component (55)；Elastic component (55) is housed in arc chute (53), and the one of elastic component (55) End is fixed on the inner wall of arc chute (53)；The one end for stopping plate (51) is fixed on shell by rotation axis (52) rotary type (4) on inner wall；One end of arc shaped slider (54) is fixed on the bottom for stopping the other end of plate (51), arc shaped slider (54) The other end is inserted in arc chute (53) and penetrating one end of arc chute (53), and the other end with elastic component (55) It is fixed；The other end of arc chute (53) is fixed on the inner wall of shell (4) and is located at the lower section for stopping plate (51)；Stop plate (51) it is used to stop the coal entered from shell (4) input port to the support of arc shaped slider (54) by elastic component (55), and It is tilted down when the coal weight of accumulation is more than the support force of elastic component (55) and coal is transferred to next layer of remaining device (5) on stop plate (51)；

Multiple heating devices (6), are installed on the inner wall of shell (4), and each layer of remaining device (5) is defeated close to shell (4) The side of entrance, which is laid out, at least one described heating device (6).

2. the coal screening testing machine according to claim 1 convenient for classification, which is characterized in that the coal screening test Machine further include:

Driving mechanism is used to drive sieve (1) with respect to bracket (3) activity with the coal on sieving screen mesh (1).

3. the coal screening testing machine according to claim 2 convenient for classification, which is characterized in that the driving mechanism driving Front and back transverse type moves back and forth sieve (1) simultaneously in the arc line type reciprocating movement of left and right；

The driving mechanism includes:

It drives clamp mechanism one (7), is used to that transverse type before and after sieve (1) to be driven to move back and forth；

It drives clamp mechanism two (8), is used to that sieve (1) left and right arc line type to be driven to move back and forth.

4. the coal screening testing machine according to claim 3 convenient for classification, which is characterized in that

The driving clamp mechanism one (7) includes:

Fixed link (71), one end are fixing end, and opposite other end is free end, and the fixing end is fixed on bracket (3)；

Half gear (73), have two semicircular profiles being oppositely arranged, the joint face of the described two semicircular profiles of connection, It is provided with the face of gear of rack gear；Half gear (73) is covered on the free end by described two semicircular profiles, and sieve (1) is solid It is scheduled on the joint face；

Two connection straps (74), one end are each attached to half gear (73) above on the side of the free end；

Disk (75), one side are fixed on the other end of two connection straps (74)；

Hydraulic telescopic rod (72), is fixed on bracket (3) and its telescopic end from the opposite other side of disk (75) is inserted in circle In disk (75), and one is fixed on the telescopic end, the telescopic end is limited into the limited block in disk (75)；

Wherein, hydraulic telescopic rod (72) pushes disk (75) to drive half gear (73) to stretch along the free end, and passes through institute It states limited block and pulls disk (75) to drive half gear (73) to retract along the free end, realize half gear (73) along the freedom End front and back transverse type moves back and forth.

5. the coal screening testing machine according to claim 3 or 4 convenient for classification, which is characterized in that

The driving clamp mechanism two (8) includes:

Servo motor (81) is fixed on bracket (3)；

Gear (82) is engaged with the face of gear of half gear (73)；

Wherein, servo motor (81) drives half gear (73) accordingly to move by driving gear (82) left and right arc line type reciprocating rotary It is dynamic.

6. the coal screening testing machine according to claim 1 convenient for classification, which is characterized in that the heating device (6) For drying lamp；Elastic component (55) is spring.

7. the coal screening testing machine according to claim 1 convenient for classification, which is characterized in that the coal screening test Machine further include:

Four piece of first breast board (11) connect with sieve (1) and forms screening slot, every piece of first breast board towards the delivery outlet (11) it is fixed between by hasp, lateral the first breast board (11) and sieve (1) are fixed, longitudinal the first breast board (11) and sieve (1) it is rotatablely connected by the second rotation axis；

Four piece of second breast board (21) connect with catch tray (2) and forms collecting tank, every piece of second breast board towards the delivery outlet (21) it is fixed between by the second hasp, lateral the second breast board (21) and catch tray (2) are fixed, longitudinal the second breast board (21) It is rotatablely connected with catch tray (2) by third rotation axis.

8. the coal screening testing machine according to claim 1 convenient for classification, which is characterized in that inserted on arc shaped slider (54) Enter that one end in arc chute (53) and is provided with the limiting section that limitation arc shaped slider (54) is detached from arc chute (53) (541)。

9. the coal screening testing machine according to claim 3 convenient for classification, which is characterized in that bracket (3) is for connecting Fixed catch tray (2), draining machine structure and driving mechanism；

The bracket (3) includes:

Two connecting rods (31), horizontally-parallel arrangement and one end and catch tray (2) are fixed, and opposite other end is fixed on control water In mechanism；The fixing end of fixed link (71) is fixed on connecting rod (31)；

Two support frames (32), horizontally-parallel arrangement and one end and catch tray (2) are fixed, and opposite other end and ground are solid It is fixed；

Protective shell (33) is arranged the middle part in catch tray (2) and is internally provided with the driving clamp mechanism two, protective shell (33) Inner wall and servo motor (81) it is fixed；

L shape connecting rod (34), one end of which is fixed on protective shell (33), opposite other end and hydraulic telescopic rod (72) are fixed.

10. the coal screening testing machine according to claim 3 convenient for classification, which is characterized in that the coal screening examination Test machine further include:

" ten " font plate (12) is arranged at the middle part of sieve (1), and the joint face of half gear (73) is fixed on " ten " font plate (12) on；

Catch tray (2), is used to collect the coal after sieve sieves；

No less than one pulley (731), fixing end and half gear (73) are fixed, the tooth socket phase of sliding end and gear (82) It cuts and is only capable of sliding laterally.