CN113351473B

CN113351473B - Efficient-based coal separation screening device

Info

Publication number: CN113351473B
Application number: CN202110921620.9A
Authority: CN
Inventors: 华凤伟
Original assignee: Jiangsu Dongchao Wear Resistant Material Co ltd
Current assignee: Jiangsu Dongchao Wear Resistant Material Co ltd
Priority date: 2021-08-12
Filing date: 2021-08-12
Publication date: 2021-11-12
Anticipated expiration: 2041-08-12
Also published as: CN113351473A

Abstract

The invention discloses a high-efficiency-based coal separation screening device, which comprises a screening machine assembly, a screening device and a screening device, wherein the screening machine assembly comprises a vibrating screen, a supporting frame arranged at the bottom of the vibrating screen, and a material leaking hole arranged in the middle of the vibrating screen; the blanking assembly is arranged below the vibrating screen and comprises a blanking piece, a material baffle plate and a fixing frame, wherein the blanking piece is arranged outside the material leaking hole, the material baffle plate is arranged at the bottom of the blanking piece, and the fixing frame is arranged inside the supporting frame and is located below the blanking piece. According to the invention, through the arrangement of the blanking assembly and the driving assembly, when a worker replaces the storage box, the striker plate can move along with the storage box to open and close the discharge hole of the blanking piece, manual operation is not required, the working strength of the worker is greatly reduced, and the efficiency of pulverized coal discharging is improved.

Description

Efficient-based coal separation screening device

Technical Field

The invention relates to the technical field of coal separation and screening, in particular to a high-efficiency coal separation and screening device.

Background

In the processing process of coal, screening operation is generally required to be carried out on the coal so as to separate coal blocks from coal dust, and the coal is convenient to be used in different scenes. The existing screening device is generally used for manually closing a discharge port or closing a machine independently and then taking out screened coal powder when the coal powder is discharged, so that the phenomenon that excessive coal powder is scattered in the discharging process and great inconvenience is brought to subsequent cleaning is avoided. This kind of mode through artifical screening needs the staff to spend more time to go to machine or discharge gate and operate, very big reduction unloading efficiency, and the efficiency of screening also can receive certain influence simultaneously.

Disclosure of Invention

In order to solve the technical problems, the invention provides the following technical scheme: an efficient coal separation screening device comprises: the screening machine assembly comprises a vibrating screen, a supporting frame arranged at the bottom of the vibrating screen and a material leaking hole arranged in the middle of the vibrating screen; the blanking assembly is arranged below the vibrating screen and comprises a blanking part arranged below the material leakage hole, a material baffle plate arranged at the bottom of the blanking part, a fixed frame arranged in the supporting frame and positioned below the blanking part, fixed plates arranged on two sides of the fixed frame, a supporting part arranged on the fixed frame and a material storage box arranged at the top of the supporting part; and the driving assembly comprises a driving piece matched with the supporting piece and a transmission piece arranged on the side surface of the fixed plate and matched with the striker plate.

As a preferable scheme of the efficient-based coal separation screening device, the driving member includes a driving motor fixed on the inner side of the fixing frame, a driving gear arranged at the output end of the driving motor, a driven gear rotatably connected to the fixing frame, a chain connecting the driving gear and the driven gear, and a projection fixed on the chain.

As a preferred scheme of the efficient-based coal separation screening device, the transmission member comprises fixing rods fixed to two sides of the bottom of the striker plate, a first connecting rod matched with the fixing rods, a first shaft arranged on the side surface of the first connecting rod, a fixing block fixed to the end part of the first connecting rod, a second connecting rod matched with the fixing block, a second shaft arranged on the side surface of the second connecting rod, a third empty groove arranged in the middle of the second connecting rod, and a connecting block arranged on the supporting member and located in the third empty groove; a first empty groove is formed in the middle of the first connecting rod, and the fixing rod is located in the first empty groove; a second empty groove is formed in the end of the second connecting rod, and the fixing block is located in the second empty groove; the first shaft is rotatably connected with the fixed plate.

As a preferable scheme of the efficient-based coal separation and screening device, the supporting member includes guide rods disposed at two sides inside the fixing frame, sliding plates slidably connected to the guide rods, fixed stoppers disposed at two sides of the sliding plates, first connecting rods disposed at outer sides of the fixed stoppers, connecting plates disposed at end portions of the first connecting rods, a reinforcing plate disposed between the two sliding plates, and linear fixing grooves disposed at a middle portion of the reinforcing plate, and the protrusions are located in the fixing grooves.

As a preferable scheme of the efficient coal separation and screening device, one side of the connecting block is fixedly matched with the connecting plate.

As a preferable scheme of the efficient coal separation and screening device, the blanking part comprises a nylon bag arranged at the bottom of the vibrating screen, a blanking hopper arranged at the bottom of the nylon bag and a stop lever arranged inside the blanking hopper, and the nylon bag is located below the material leakage hole.

As a preferable scheme of the efficient-based coal separation screening device, the efficient-based coal separation screening device further comprises U-shaped limiting blocks arranged on two sides of the blanking hopper, first limiting grooves arranged on two side walls of the striker plate, T-shaped limiting blocks arranged on the side face of the blanking hopper, and second limiting grooves arranged on the top of the striker plate, wherein the U-shaped limiting blocks are in sliding fit with the first limiting grooves, and the T-shaped limiting blocks are in sliding fit with the second limiting grooves.

The invention has the beneficial effects that: according to the invention, through the arrangement of the blanking assembly and the driving assembly, when a storage box is replaced by a worker, the striker plate can move along with the storage box to open and close the discharge hole of the blanking piece, so that the manual operation is not required, the working intensity of the worker is greatly reduced, and the efficiency of pulverized coal discharging is improved.

Drawings

Fig. 1 is an overall structural view of a high-efficiency coal separation and screening device.

Figure 2 is another perspective view of a screen assembly based on a high efficiency coal screening device.

Fig. 3 is a structure diagram of a blanking assembly based on an efficient coal sorting and screening device.

Fig. 4 is a connection structure of a driving member and a fixing frame based on a high-efficiency coal sorting and screening device.

Fig. 5 is a connecting structure diagram of a transmission member and a striker plate based on the efficient coal separation screening device.

Fig. 6 is a combined structure of a support member and a fixing frame based on a high-efficiency coal sorting and screening device.

Fig. 7 is a connecting structure diagram of a striker plate and a blanking hopper based on an efficient coal separation screening device.

In the figure: 100. a screen assembly; 101. vibrating screen; 102. a support frame; 103. a material leaking hole; 200. a blanking assembly; 201. blanking parts; 201a, nylon bags; 201b, a discharging hopper; 201c, a stop lever; 202. a striker plate; 202a and a U-shaped limiting block; 202b, a first limit groove; 202c, a T-shaped limiting block; 202d, a second limiting groove; 203. a fixed mount; 204. a fixing plate; 205. a support member; 205a, a guide rod; 205b, a slide plate; 205c, a fixed stop; 205d, a first connecting rod; 205e, a connecting plate; 205f, a reinforcement plate; 205g, fixing grooves; 206. a material storage box; 300. a drive assembly; 301. a drive member; 301a, a drive motor; 301b, a drive gear; 301c, a driven gear; 301d, a chain; 301e, a bump; 301f, a first limiting plate; 301g, a second limiting plate; 302. a transmission member; 302a, fixing the rod; 302b, a first link; 302c, a first empty slot; 302d, first shaft; 302e, a fixed block; 302f, a second link; 302g, a second empty groove; 302h, a second axis; 302i, a third empty slot; 302j, connecting block.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Example 1

Referring to fig. 1 to 3, a first embodiment of the present invention provides a high-efficiency coal separation and screening device, which includes a screening machine assembly 100, a blanking assembly 200, and a driving assembly 300, wherein coal is screened by the screening machine assembly 100, and then the discharge efficiency of pulverized coal is improved by the cooperation between the blanking assembly 200 and the driving assembly 300.

The screen assembly 100 includes a shaker 101, a support bracket 102 disposed at the bottom of the shaker 101, and a material discharge hole 103 disposed at the middle of the shaker 101. The vibrating screen 101 is fixed and supported through the support frame 102, coal is screened through the vibrating screen 101, and screened coal dust is led out downwards through the material leakage hole 103. As shown in fig. 1 and 2, the vibrating screen 101 is composed of a vibrator and a screen box, the screen box is inclined downwards, the vibrator is arranged on the outer wall of the screen box at a higher position, and a screen is arranged on the material leaking hole 103. The staff guides in the coal from the high one side of sieve case to the sieve incasement, and the coal that the screening got off can be followed the low lateral movement of a high side because the effect of gravity and vibrator, because the middle part at the sieve case is established to hourglass material hole 103, and hourglass material hole 103 is rectangular rectangle form, when the coal that the screening got off moved to low one side, can follow hourglass material hole 103 and derive downwards, and the coal of big granule can be derived from the lower one side of sieve case. As shown in fig. 1 and 2, the vibrating screen 101 is connected to the supporting frame 102 through a movable stay bar, and elastic elements such as a coil spring, a plate spring, a rubber spring and the like can be used in the vibrating screen 101, so that the vibrating screen 101 has a buffering effect in the using process and the supporting frame 102 is prevented from being subjected to large impact force.

The blanking assembly 200 is disposed below the vibrating screen 101, and includes a blanking member 201 disposed below the material leaking hole 103, a material blocking plate 202 disposed at the bottom of the blanking member 201, a fixing frame 203 fixed inside the supporting frame 102 and located below the blanking member 201, fixing plates 204 disposed at two sides of the fixing frame 203, a supporting member 205 disposed inside the fixing frame 203, and a material storage box 206 disposed at the top of the supporting member 205. The storage tank 206 is supported by the supporting piece 205, so that the storage tank is more stable and more convenient to place and move, and the pulverized coal led out from the material leakage hole 103 is guided into the storage tank 206 by the blanking piece 201 to be collected; after the storage box 206 is full, take it out, seal down 201 through striker plate 202 simultaneously, avoid too much buggy to flow out at will, bring great inconvenience for the clearance. The supporting member 205 has a rectangular frame structure, a supporting member at the bottom thereof, and a frame-type limiting member at the side thereof, wherein when the storage bin 206 is placed on the supporting member 205, the supporting member supports the storage bin 206, and the limiting member prevents the storage bin 206 from moving.

The driving assembly 300 includes a driving member 301 disposed at the bottom of the supporting member 205, and a driving member 302 disposed at the side of the fixing plate 204. The driving part 301 drives the supporting part 205 in the unloading process, so that the storage tank 206 above the supporting part 205 can be moved to a position where taking is more convenient, the driving part 302 drives the striker plate 202 to move along with the storage tank 206, and when the storage tank 206 moves away, the striker plate 202 seals a discharge hole of the unloading part 201, thereby avoiding more leakage of coal dust in the process of replacing the storage tank 206 and bringing inconvenience to subsequent cleaning; in the process of guiding the storage tank 206 to the lower part of the blanking part 201, the striker plate 202 can continue to move along with the blanking part 201, and the discharge hole of the blanking part 201 is opened, so that the pulverized coal continues to drop downwards to the inside of the storage tank 206.

When using, sieve the coal through reciprocating sieve 101, the buggy that has sieved is derived downwards through leaking material hole 103, and the inside of leading-in storage case 206 of buggy is followed to the unloading spare 201 again, concentrates the collection through storage case 206 to the buggy, very big improvement the discharging efficiency of buggy. After storage tank 206 is filled with, drive support piece 205 through driving piece 301 and remove, derive the storage tank 206 who will fill with through support piece 205, make that the staff can be more convenient change storage tank 206, when deriving storage tank 206, striker plate 202 can follow its removal, seal the discharge gate of unloading 201, avoid changing the in-process buggy and take place more revealing to storage tank 206, bring great inconvenience for subsequent clearance. Place empty storage tank 206 on support piece 205, bring storage tank 206 into the below of unloading 201 through driving piece 301 and support piece 205 once more, striker plate 202 follows its removal and opens the discharge gate of unloading 201 simultaneously, and the buggy continues to drop and collects in storage tank 206, need not the artifical ejection of compact to the buggy alone and controls, very big reduction staff's working strength, and the discharging efficiency of buggy more increases.

Example 2

Referring to fig. 4 and 5, a second embodiment of the present invention is based on the previous embodiment.

Specifically, the driving element 301 includes a driving motor 301a disposed inside the fixing frame 203, a driving gear 301b disposed at an output end of the driving motor 301a, a driven gear 301c disposed inside the fixing frame 203 and located outside the driving gear 301b, a chain 301d disposed on a surface of the driving gear 301b, and a protrusion 301e disposed at a top of the chain 301d, wherein the driving gear 301b and the driven gear 301c are in transmission fit via the chain 301 d. The driving gear 301b is driven by the driving motor 301a to rotate, and the driven gear 301c is driven by the chain 301d to rotate. The projection 301e is fixed on the top of the chain 301d, the projection 301e will move along with the rotation of the chain 301d, the projection 301e is further engaged with the supporting member 205, and when the projection 301e moves along with the chain 301d, the supporting member 205 moves along the direction of the magazine 206.

The driving member 301 further includes a first limiting plate 301f disposed outside the driving motor 301a, and a second limiting plate 301g disposed at the bottom of the driven gear 301c, the driven gear 301c is rotatably matched with the second limiting plate 301g, and one end of the first limiting plate 301f is fixedly matched with one end of the second limiting plate 301g through the supporting frame 102. Fix driving motor 301a through first limiting plate 301f, make its installation more convenient and firm, carry out spacingly to driven gear 301c through second limiting plate 301g simultaneously, avoid it to take place the skew or drop at the rotation in-process.

Two sets of transmission members 302 are provided for connecting the striker plate 202 and the fixing plate 204. Each set of transmission members 302 includes a fixing rod 302a disposed on one side of the bottom of the striker plate 202, a first connecting rod 302b engaged with the fixing rod 302a, a first empty slot 302c disposed in the middle of the first connecting rod 302b, a first shaft 302d disposed on the side of the first connecting rod 302b, and a fixing block 302e fixed on the other side of the first connecting rod 302 b. The first link 302b is rotatably engaged with the fixed plate 204 via a first shaft 302d, the fixed rod 302a is slidably engaged inside the first hollow 302c, and the first link 302b rotates about the first shaft 302 d. The length of the first empty groove 302c can be set according to actual use conditions, so that the first connecting rod 302b is prevented from bending when rotating.

Each set of transmission members 302 further includes a second connecting rod 302f disposed outside the fixing block 302e, a second empty groove 302g disposed in the middle of the second connecting rod 302f and engaged with the fixing block 302e, a second shaft 302h disposed on the side of the second connecting rod 302f, a third empty groove 302i disposed in the middle of the second connecting rod 302f, and a connecting block 302j disposed inside the third empty groove 302i, wherein the connecting block 302j is fixed on the supporting member 205. Drive second connecting rod 302f through support piece 205 and connecting block 302j and rotate, rethread second connecting rod 302f and fixed block 302e drive first connecting rod 302b and rotate, can drive striker plate 202 and remove when support piece 205 removes, and wherein the setting up of second dead slot 302g and third dead slot 302i makes second connecting rod 302f more convenient at the pivoted in-process, avoids it to take place phenomenons such as buckling.

When the coal powder screening device is used, coal is screened through the vibrating screen 101, screened coal powder is downwards led out through the material leakage hole 103, then the coal powder is led into the storage box 206 through the blanking piece 201, and the coal powder is collected in a centralized mode through the storage box 206. After the storage bin 206 is full, the driving motor 301a is started, the driving gear 301b is driven to rotate by the driving motor 301a, and the driven gear 301c is driven to rotate by the chain 301d, wherein the protrusion 301e is fixed at the top of the chain 301d, the protrusion 301e can move along with the rotation of the chain 301d, and at the moment, the supporting member 205 moves outwards by the cooperation between the protrusion 301e and the supporting member 205, so that the storage bin 206 on the supporting member 205 is guided out. Drive second connecting rod 302f through support piece 205 and connecting block 302j and rotate, rethread second connecting rod 302f and fixed block 302e drive first connecting rod 302b and rotate, can drive striker plate 202 when support piece 205 removes and remove, seal the discharge gate of unloading 201 through striker plate 202, avoid taking place more revealing in the in-process buggy that changes storage tank 206, bring great inconvenience for subsequent clearance. Place empty storage tank 206 on support piece 205, restart driving motor 301a again, make lug 301e follow chain 301d and rotate and remove to the opposite side of chain 301d, can drive support piece 205 and storage tank 206 and move to the inboard this moment, until storage tank 206 is located the below of unloading 201, the rotation through first connecting rod 302b and second connecting rod 302f once more at this moment drives striker plate 202 and follows its removal, open the discharge gate of unloading 201, make the buggy that has sieved continue to drop in the inside of storage tank 206.

Example 3

Referring to fig. 6 and 7, a third embodiment of the present invention is based on the first two embodiments.

The supporting member 205 includes a guide rod 205a fixed to two sides of the inner portion of the fixing frame 203, a sliding plate 205b disposed on the surface of the guide rod 205a, a fixed stopper 205c disposed on two sides of the top of the sliding plate 205b, a first connecting rod 205d disposed outside the fixed stopper 205c, and a connecting plate 205e disposed at one end of the first connecting rod 205 d. The guide rod 205a penetrates through the sliding plate 205b, and the sliding plate 205b is limited by the guide rod 205a, so that the sliding plate 205b is prevented from being deviated in the moving process. The storage tank 206 is limited by the fixed stop block 205c and the connecting plate 205e, so that the installation is more convenient, and the storage tank 206 is prevented from shifting in the process of moving and collecting pulverized coal.

The supporting member 205 further includes a reinforcing plate 205f disposed between the two sliding plates 205b, and a linear type fixing groove 205g disposed at a middle portion of the reinforcing plate 205f, and the two sliding plates 205b are fixed by the reinforcing plate 205f while moving components on both sides of the supporting member 205 simultaneously.

The projection 301e is slidably fitted into the fixing groove 205g, and one side of the connecting piece 302j is fixedly fitted to the connecting plate 205 e. The length of the fixing groove 205g is greater than the diameter of the driving gear 301b, so that when the reinforcing plate 205f reciprocates above the chain 301d along with the protrusion 301e, the protrusion 301e can be always located inside the fixing groove 205g, i.e., the protrusion 301e and the chain 301d can drive the reinforcing plate 205f and the sliding plate 205b to move.

The discharging member 201 includes a nylon bag 201a disposed at the bottom of the vibrating screen 101, a discharging hopper 201b disposed at the bottom of the nylon bag 201a, and a blocking rod 201c disposed inside the discharging hopper 201 b. The nylon bag 201a is positioned below the material leaking hole 103. Nylon bag 201a is fixed in the bottom of sieve case in reciprocating sieve 101, and it sets up to the rectangle, and both ends are uncovered, and material leakage hole 103 is located the inboard of nylon bag 201a, and nylon bag 201a is used for connecting hopper 201b and material leakage hole 103 down. Wherein adopt fixed modes such as welding or threaded connection between hopper 201b and the support frame 102 down, avoid it to take place to rock or squint in the use, influence the discharging efficiency of buggy, set up through nylon bag 201a and avoid reciprocating sieve 101 hopper 201b to take place to rock under the use drives, the ejection of compact that leads to the buggy is smooth and easy inadequately, can play certain mediation effect to the buggy simultaneously, avoid taking place situations such as jam at unloading in-process buggy. As shown in fig. 7, hopper 201b is the hopper-shaped of rectangle, and its lower extreme opening is less than the upper end opening, and hopper 201b is inside to have accommodation space down, can carry out temporary storage to the buggy that has sieved through the cooperation of hopper 201b and striker plate 202 down, avoids taking place to reveal or block up the buggy when changing storage tank 206, influences its discharging efficiency.

Two sides of the lower hopper 201b are provided with U-shaped limiting blocks 202a, two sides of the striker plate 202 are provided with first limiting grooves 202b, the side surface of the lower hopper 201b is provided with a T-shaped limiting block 202c, and the upper bottom surface of the striker plate 202 is provided with a second limiting groove 202 d. The U-shaped stopper 202a is slidably engaged with the first stopper groove 202b, and the T-shaped stopper 202c is slidably engaged with the second stopper groove 202 d. Carry on spacingly to striker plate 202 through U type stopper 202a and first spacing groove 202b, avoid it to take place situations such as skew at the in-process that removes, influence the effect of keeping off the material, it is further spacing to striker plate 202 through setting up of T type stopper 202c and second spacing groove 202d simultaneously, it is more firm at the in-process that removes to make it, it takes place the slope at the in-process that removes to avoid striker plate 202, wherein the position and the size of pin 201c all correspond with second spacing groove 202d, protect second spacing groove 202d through pin 201c, it gets into inside second spacing groove 202d to avoid striker plate 202 at the too much buggy of in-process that removes, cause great hindrance for T type stopper 202 c.

When using, sieve the coal through reciprocating sieve 101, the buggy that has sieved is derived downwards through leaking material hole 103, and the inside of storage case 206 is leading-in to the buggy that has sieved to the rethread nylon bag 201a and hopper 201b down, concentrates the collection through storage case 206 to the buggy, very big improvement the discharging efficiency of buggy. After the storage bin 206 is full, the driving motor 301a is started, the driving gear 301b is driven to rotate by the driving motor 301a, the driven gear 301c is driven to rotate by the driving gear 301b and the chain 301d, the bump 301e is fixed to the top of the chain 301d, the bump 301e can move along with the rotation of the chain 301d, and the sliding plate 205b moves outwards by the cooperation of the bump 301e, the fixing groove 205g and the reinforcing plate 205f, so that the storage bin 206 on the sliding plate 205b is guided out. Meanwhile, the second connecting rod 302f is driven to rotate by the connecting plate 205e and the connecting block 302j, the first connecting rod 302b is driven to rotate by the second connecting rod 302f and the fixing block 302e, the striker plate 202 can be driven to move while the sliding plate 205b moves, and the discharge hole of the discharging hopper 201b is sealed by the striker plate 202. Place empty storage tank 206 on slide 205b, restart driving motor 301a again, make lug 301e follow chain 301d and rotate and remove to the opposite side of chain 301d, can drive slide 205b and storage tank 206 simultaneously and move to the inboard, until storage tank 206 is located the below of hopper 201b down, the rotation through first connecting rod 302b and second connecting rod 302f once more at this moment drives striker plate 202 and follows its removal, the discharge gate of hopper 201b will be down opened, make the buggy that has sieved continue to drop and collect in the inside of storage tank 206.

It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims

1. The utility model provides a screening plant is selected to coal based on efficient which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,

the screening machine assembly (100) comprises a vibrating screen (101), a supporting frame (102) arranged at the bottom of the vibrating screen (101), and a material leaking hole (103) arranged in the middle of the vibrating screen (101);

the blanking assembly (200) is arranged below the vibrating screen (101) and comprises a blanking part (201) arranged below the material leakage hole (103), a material baffle plate (202) arranged at the bottom of the blanking part (201), a fixing frame (203) arranged in the supporting frame (102) and positioned below the blanking part (201), fixing plates (204) arranged at two sides of the fixing frame (203), a supporting piece (205) arranged on the fixing frame (203) and a material storage box (206) arranged at the top of the supporting piece (205); and

the driving assembly (300) comprises a driving piece (301) matched with the supporting piece (205) and a transmission piece (302) arranged on the side surface of the fixing plate (204) and matched with the striker plate (202);

the driving piece (301) comprises a driving motor (301 a) fixed on the inner side of the fixed frame (203), a driving gear (301 b) arranged at the output end of the driving motor (301 a), a driven gear (301 c) rotationally connected to the fixed frame (203), a chain (301 d) connected with the driving gear (301 b) and the driven gear (301 c), and a lug (301 e) fixed on the chain (301 d);

the transmission piece (302) comprises fixing rods (302 a) fixed to two sides of the bottom of the striker plate (202), a first connecting rod (302 b) matched with the fixing rods (302 a), a first shaft (302 d) arranged on the side surface of the first connecting rod (302 b), a fixing block (302 e) fixed to the end part of the first connecting rod (302 b), a second connecting rod (302 f) matched with the fixing block (302 e), a second shaft (302 h) arranged on the side surface of the second connecting rod (302 f), a third empty groove (302 i) arranged in the middle of the second connecting rod (302 f), and a connecting block (302 j) arranged on the supporting piece (205) and located in the third empty groove (302 i);

a first empty groove (302 c) is formed in the middle of the first connecting rod (302 b), and the fixing rod (302 a) is located in the first empty groove (302 c);

a second empty groove (302 g) is formed in the end of the second connecting rod (302 f), and the fixed block (302 e) is located in the second empty groove (302 g);

the first shaft (302 d) is rotatably connected with the fixed plate (204);

the supporting piece (205) comprises guide rods (205 a) arranged on two sides inside the fixed frame (203), sliding plates (205 b) connected with the guide rods (205 a) in a sliding mode, fixed stop blocks (205 c) arranged on two sides of each sliding plate (205 b), a first connecting rod (205 d) arranged on the outer side of each fixed stop block (205 c), a connecting plate (205 e) arranged at the end part of each first connecting rod (205 d), a reinforcing plate (205 f) arranged between every two sliding plates (205 b), and a linear fixing groove (205 g) arranged in the middle of each reinforcing plate (205 f), wherein the protruding blocks (301 e) are located in the fixing grooves (205 g);

one side of the connecting block (302 j) is fixedly matched with the connecting plate (205 e).

2. The efficient coal separation and screening device as recited in claim 1, wherein: unloading spare (201) including set up in nylon bag (201 a) of reciprocating sieve (101) bottom, set up in lower hopper (201 b) of nylon bag (201 a) bottom, and set up in down inside pin (201 c) of hopper (201 b), nylon bag (201 a) are located hourglass material hole (103) below.

3. The efficient coal separation and screening device as recited in claim 2, wherein: the material stopping device is characterized by further comprising a U-shaped limiting block (202 a) arranged on two sides of the lower hopper (201 b), a first limiting groove (202 b) arranged on two side walls of the material stopping plate (202), a T-shaped limiting block (202 c) arranged on the side surface of the lower hopper (201 b), and a second limiting groove (202 d) arranged at the top of the material stopping plate (202), wherein the U-shaped limiting block (202 a) is in sliding fit with the first limiting groove (202 b), and the T-shaped limiting block (202 c) is in sliding fit with the second limiting groove (202 d).