阅读说明：本技术 一种砂石分离机 (Sand and stone separator ) 是由 蔡海峰 吕贇 章雅萍 蔡金方 于 2019-11-19 设计创作，主要内容包括：本发明涉及分离机技术领域,尤其是涉及一种砂石分离机,本发明包括支架、桶体和盖体,盖体上设有进料斗,桶体下侧设有出料斗,进料斗和出料斗上均安装有阀门,桶体内设有搅拌组件、滤网、通道,滤网的上表面设有落料口,落料口内插接有刷除件,刷除件的下侧抵触有支撑板,桶体上设有升降件,搅拌组件上设有限位组件。当需要清理滤网上的石子和废料时,先通过升降件带动支撑板上升,支撑板将推动刷除件上升使得落料口露出；限位组件将把刷除件限位固定,搅拌组件将带动刷除件旋转,使得滤网上的石子和废渣被刷入到落料口内并通过通道排出。本发明便于石子和废渣的清理。(The invention relates to the technical field of separators, in particular to a sand-stone separator which comprises a support, a barrel body and a cover body, wherein a feed hopper is arranged on the cover body, a discharge hopper is arranged at the lower side of the barrel body, valves are respectively arranged on the feed hopper and the discharge hopper, a stirring assembly, a filter screen and a channel are arranged in the barrel body, a blanking port is arranged on the upper surface of the filter screen, a brushing part is inserted in the blanking port, a supporting plate is abutted to the lower side of the brushing part, a lifting part is arranged on the barrel body, and a limiting assembly is. When stones and waste materials on the filter screen need to be cleaned, the lifting piece drives the supporting plate to ascend, and the supporting plate pushes the brushing piece to ascend to expose the blanking port; spacing subassembly will be removed the brush spacing fixed, and the stirring subassembly will drive the brush and remove a rotation for stone and waste residue on the filter screen are brushed into in the blanking mouth and are discharged through the passageway. The invention is convenient for cleaning stones and waste residues.)

1. The utility model provides a sand and stone separator, includes support (1), fixes on support (1) and opening staving (11) and installs lid (12) at staving (11) top through a plurality of bolts (121), is equipped with feeder hopper (13) on lid (12), and staving (11) downside is equipped with out hopper (14), all installs valve (15), its characterized in that on feeder hopper (13) and play hopper (14): be equipped with in staving (11) from last stirring subassembly (2) that are used for rotatory stirring material that sets gradually down, supply filter screen (3) that the sand passed, supply passageway (28) of stone and waste residue roll-off staving (11), the upper surface of filter screen (3) is equipped with blanking mouth (31), it has brushing part (32) along staving (11) radial extension to peg graft in blanking mouth (31), the downside of brushing part (32) is contradicted and is had backup pad (33), be equipped with the lift piece that is used for driving backup pad (33) and goes up and down on staving (11), be equipped with on stirring subassembly (2) and be used for brushing spacing fixed spacing subassembly (27) of part (32), the one end of passageway (28) communicates in blanking mouth (31), the other end of passageway (28) is worn out in staving (11).

2. A sand separator according to claim 1, wherein: stirring subassembly (2) including rotate connect in churn (21) of lid (12), a plurality of crushing leaf (24) of locating on churn (21) outer wall and be used for driving churn (21) pivoted drive assembly (26), the intercommunication has a plurality of jet-propelled pipes (211) on the outer wall of churn (21), and the top of churn (21) is worn out in following staving (11), and this end internal rotation inlays and is equipped with steam pipe (4).

3. A sand separator according to claim 2, wherein: spacing subassembly (27) including fixed cover be equipped with spacing ring (271) outside churn (21) and fix solid fixed ring (272) on staving (11) inner wall, the lower surface of spacing ring (271) is seted up and is supplied that brush except that piece (32) slip to inlay establishes groove (273), gu fixed ring (272) is "U" shape setting and opening towards churn (21), gu be equipped with on fixed ring (272) and supply that brush except that the slip of piece (32) inlays annular chamber (274) established and supply that brush except that piece (32) slip into breach (275) in annular chamber (274), the lower surface of solid fixed ring (272) is located in breach (275), backup pad (33) slip is pegged graft in breach (275).

4. A sand separator according to claim 3, wherein: the embedded groove (273) is internally provided with a buffer plate (277) and an elastic piece which pushes the buffer plate (277) to butt against the brushing part (32), and the buffer plate (277) is embedded in the embedded groove (273) in a sliding manner.

5. A sand separator according to claim 4, wherein: buffer board (277) and elastic component are inlayed and are established the symmetry and be equipped with two sets ofly in groove (273), two sets of buffer board (277) support respectively tightly in brushing the both sides that remove a (32) is relative, the lower surface of two sets of buffer board (277) all is equipped with towards brushing the guide surface (278) that removes a (32) slope, be equipped with two sets of limiting plate (38) that extend along vertical direction between solid fixed ring (272) and filter screen (3), two sets of limiting plate (38) are all fixed on staving (11) inner wall and have enclosed jointly and have enclosed into the spacing chamber (39) that the slip of confession brushing removal piece (32) was inlayed and is established.

6. A sand separator according to claim 2, wherein: the outer wall of the mixing drum (21) is circumferentially communicated with a plurality of connecting pipes (22), all the connecting pipes (22) are communicated with branch pipes (23) extending in the vertical direction, and the outer walls of all the branch pipes (23) are communicated with a plurality of air injection pipes (211).

7. A sand separator according to claim 6, wherein: and a plurality of crushing leaves (24) are fixed on the outer walls of all the branch pipes (23).

8. A sand separator according to claim 7, wherein: all branch pipes (23) are rotatably connected to corresponding connecting pipes (22), all branch pipes (23) are fixedly sleeved with matching gears (231), and inner gear rings (232) meshed with all matching gears (231) are fixed on the inner wall of the barrel body (11).

Technical Field

The invention relates to the technical field of separators, in particular to a sand-stone separator.

Background

The premixed concrete is a concrete mixture prepared by mixing cement, aggregate, water, an additive, a mineral admixture and the like according to a certain proportion. The premixed concrete can generate waste residues in the production process, the waste residues are doped with sand stones, if the sand stones are not recycled, resources are wasted, and therefore, a factory usually adopts a sand stone separator to separate and recycle the sand stones.

As shown in fig. 1, the existing sand-stone separator includes a bracket 1, a barrel 11 fixed on the bracket 1 and having an upward opening, and a cover 12 installed on the top of the barrel 11 through a plurality of bolts 121, wherein a feed hopper 13 is provided on the cover 12, a discharge hopper 14 is provided on the lower side of the barrel 11, valves 15 are both installed on the feed hopper 13 and the discharge hopper 14, the barrel 11 is generally a circular barrel, a stirring paddle 16 and a filter screen 3 provided on the lower side of the stirring paddle 16 are provided in the barrel 11, and a driving motor 261 for driving the stirring paddle 16 to rotate is provided on the top of the barrel 11. In the process of separating the sand and the stone, the concrete with the sand and the stone is firstly put into the barrel body 11 through the feed hopper 13, then the driving motor 261 drives the stirring paddle 16 to rotate, the stirring paddle 16 smashes the concrete blocks, the sand penetrates through the filter screen 3 and falls into the bottom of the barrel body 11, and the stones and the waste residues are remained on the surface of the filter screen 3, so that the separation of the sand and the stone is realized.

The above prior art solutions have the following drawbacks: after the sand and stone are separated, the stones and waste residues on the filter screen need to be cleaned, and at the moment, workers need to sequentially unscrew the bolts on the cover body and then disassemble the cover body, so that the stones and waste residues on the filter screen can be cleaned; after the stones and the waste residues are cleaned, the cover body is required to be installed on the barrel body through bolts, so that the stones and the waste residues are inconvenient to clean, and improvement is needed.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a sand-stone separator which is convenient for cleaning stones and waste residues.

The technical purpose of the invention is realized by the following technical scheme: the utility model provides a sand and stone separator, which comprises a bracket, fix on the support and the staving of opening up and install the lid at the staving top through a plurality of bolts, be equipped with the feeder hopper on the lid, the staving downside is equipped with out the hopper, all install the valve on feeder hopper and the play hopper, be equipped with in the staving from last stirring subassembly that is used for rotatory stirring material that sets gradually down, the filter screen that supplies the sand to pass, the passageway that supplies stone and waste residue roll-off staving, the upper surface of filter screen is equipped with the blanking mouth, it has the brushing part along staving radial extension to peg graft in the blanking mouth, the downside of brushing part is contradicted and is had the backup pad, be equipped with the lift piece that is used for driving the backup pad lift on the staving, be equipped with on the stirring subassembly and be used for brushing.

By adopting the technical scheme, in the process of separating the sand and the stone, the concrete with the sand and the stone is poured into the barrel body through the feed hopper; the stirring assembly is used for rotationally stirring concrete, so that the concrete blocks are smashed, sand passes through the filter screen and falls into the bottom of the barrel body, stones and waste residues are remained on the surface of the filter screen, and the separation of sand and stone is realized.

When the valve on the discharge hopper is opened, the sand is discharged through the discharge hopper; when stones and waste materials on the filter screen need to be cleaned, the lifting piece drives the supporting plate to ascend, and the supporting plate pushes the brushing piece to ascend to expose the blanking port; when the brush removes the piece and rises to spacing subassembly department, spacing subassembly will be removed the brush spacing fixing on the stirring subassembly, then the stirring subassembly will drive the brush and remove a rotation, because of the brush removes the piece and radially extends along the staving, so the brush removes the piece and will brush into the blanking mouth to the stone and the waste residue on the filter screen in rotatory in-process, fall into the intraoral stone of blanking and waste residue and will discharge outside the staving through the passageway.

When no stones and waste residues are discharged from the channel, the stirring component drives the brushing part to move to the position right above the blanking port, the limiting and fixing of the limiting component on the brushing part are cancelled, then the lifting component drives the supporting plate to descend, and at the moment, the brushing part descends due to gravity and is sealed at the blanking port, so that sand is not easy to penetrate through the blanking port to enter the channel when the stirring component is used for stirring concrete; this sand and stone separator need not to open the clearance that the lid can realize grit and waste residue, convenient operation.

The invention is further configured to: the stirring assembly comprises a stirring barrel, a plurality of crushing leaves and a driving assembly, wherein the stirring barrel is rotatably connected to the outer wall of the cover body, the crushing leaves are arranged on the outer wall of the stirring barrel, the driving assembly is used for driving the stirring barrel to rotate, the outer wall of the stirring barrel is communicated with a plurality of air jet pipes, the top end of the stirring barrel penetrates out of the barrel body, and a hot air pipe is embedded in the end of the stirring barrel.

By adopting the technical scheme, when the driving assembly drives the stirring cylinder to rotate, the crushing blades crush and stir the concrete so as to separate sand from stone; in the rotation process of the mixing drum, hot air pipes introduce hot air into the mixing drum, the hot air is sprayed into the drum body through the air spraying pipes, the hot air can dry sand and can be directly sprayed onto concrete blocks, the separation speed of the sand from the concrete blocks is increased, and the separation effect of the sand is improved.

The invention is further configured to: spacing subassembly is equipped with the spacing ring outside the agitator and fixes the solid fixed ring on the staving inner wall including fixed cover, and the lower surface of spacing ring is seted up and is supplied the brush to remove a slip inlays that establish and establishes the groove, and solid fixed ring is "U" shape setting and opening towards the agitator, is equipped with on the solid fixed ring to supply the brush to remove a slip to inlay the annular chamber of establishing and supplies the brush to remove a breach that slides into the annular chamber, and solid fixed ring's lower surface is located to the breach, and the backup pad slides and pegs graft in the breach.

Through adopting above-mentioned technical scheme, when needs clear up stone and waste residue on the filter screen, drive the backup pad through the piece that goes up and down and rise, the backup pad will promote the brush and remove the piece and rise and make the blanking mouth expose, after in the breach is pegged graft in the backup pad slides, the brush will be embedded into and inlay and establish the inslot and through the breach embedding annular chamber, the brush removes the piece this moment and will only can slide in the annular chamber to stirring subassembly drive the rotatory brush of brush and remove stone and waste residue on the filter screen.

When the passageway does not have stone and waste residue discharge back, drive the backup pad through the piece that goes up and down earlier and descend and make the breach expose, rethread drive assembly drives the brush and removes a motion, when the brush removes a motion to the blanking mouth directly over, the brush removes the piece and will descend from the breach roll-off because of gravity, and the brush that follows the breach roll-off removes the piece and establishes the groove with the embedding with the roll-off annular chamber and in embedding the blanking mouth to seal the blanking mouth.

The invention is further configured to: the embedded groove is internally provided with a buffer plate and an elastic part which pushes the buffer plate to abut against the brushing part, and the buffer plate is slidably embedded in the embedded groove.

Through adopting above-mentioned technical scheme, drive the brush and remove a motion to the blanking mouth when going up directly over at drive assembly, the brush removes the piece and will drop and follow the breach roll-off gradually because of gravity, and brush removes a roll-off breach and inlays and establish the groove and need certain time, and drive assembly probably can't in time stop the drive rotation to churn and brush removal piece this moment, so the brush removes a probably by the rupture.

Because of the setting of elastic component and buffer board, if when brushing the piece from the breach roll-off, drive assembly still drives the churn and brushes and removes the piece rotation, the buffer board will support tightly in brushing the piece and make the elastic component compressed, at the in-process that the elastic component was continuously compressed, the position of buffer board will remain unchanged, so buffer board and elastic component have given brushing and have removed a certain fall time for brushing and removing the difficult quilt rupture.

The invention is further configured to: buffer board and elastic component inlay and establish the inslot symmetry and be equipped with two sets ofly, and two sets of buffer boards support respectively tightly in the relative both sides of brushing-off piece, and the lower surface of two sets of buffer boards all is equipped with towards the spigot surface of brushing-off piece slope, is equipped with two sets of limiting plates that extend along vertical direction between solid fixed ring and the filter screen, and two sets of limiting plates are all fixed on the staving inner wall and have enclosed jointly and have enclosed into the spacing chamber that supplies brushing-off piece slip to inlay to establish.

By adopting the technical scheme, when stones and waste residues on the filter screen need to be cleaned, the embedded groove may not be aligned with the blanking port; when the lifting piece drives the supporting plate to ascend, the supporting plate pushes the brushing piece to ascend into the limiting cavity and abut against the guide surface, the limiting cavity enables the brushing piece to slide only in the vertical direction, so that the brushing piece can slide into the annular cavity through the notch, and the brushing piece pushes the buffer plate to move through the guide surface to enable the corresponding elastic piece to be compressed; when the supporting plate rises to be sealed in the notch, the brushing part is embedded into the annular cavity and the embedding groove, so that the arrangement of the guide surface and the limiting cavity is convenient for the brushing part to be embedded into the annular cavity and the embedding groove.

After the brush removes an embedding annular chamber and inlays and establish the inslot, the elastic component of compressed will kick-back and promote the brush through the buffer board and remove a slip and compress tightly in another buffer board, and two sets of elastic components will all be in the compression state and make two sets of buffer boards press from both sides tightly in the brush and remove a jointly to improved the brush and removed the stability of piece when the brush removes stone and waste residue.

The invention is further configured to: the circumference intercommunication has a plurality of connecting pipes on the outer wall of churn, all communicates on all the connecting pipes to have along the branch pipe of vertical direction extension, all communicates on the outer wall of all branch pipes to have a plurality of jet-propelled pipes.

Through adopting above-mentioned technical scheme, drive churn pivoted in-process at drive assembly, all connecting pipes and branch pipe all will the driven rotation, and steam in the steam pipe will loop through churn, connecting pipe, branch pipe and follow jet-propelled pipe blowout, has both improved the stoving effect of steam to different regional sands in the staving, makes the concrete piece that steam can direct injection different regions in the staving again to the separation effect of sand has further been improved.

The invention is further configured to: and a plurality of crushing leaves are fixed on the outer walls of all the branch pipes.

Through adopting above-mentioned technical scheme, drive the churn pivoted in-process at drive assembly, all connecting pipes and branch pipe all will driven rotation, and the crushing leaf that is located on the branch pipe will also smash the stirring to concrete to the stirring effect of smashing of stirring subassembly to concrete has been improved.

The invention is further configured to: all the branch pipes are rotatably connected to the corresponding connecting pipes, the matching gears are fixedly sleeved outside all the branch pipes, and inner gear rings meshed with all the matching gears are fixed on the inner wall of the barrel body.

By adopting the technical scheme, in the process that the driving assembly drives the mixing drum to rotate, all the connecting pipes are driven to rotate, and all the branch pipes rotate relative to the axes of the branch pipes because the inner gear rings are meshed with all the matched gears, so that the crushing and mixing effects of the crushing blades on concrete are further improved, and the separation effect of the hot air pipes on sand is improved.

In conclusion, the invention has the following beneficial effects:

1. the stirring assembly, the brushing-removing part, the channel, the filter screen, the supporting plate, the lifting part and the limiting assembly are arranged, so that the sand and waste slag can be cleaned without opening the cover body, and the operation is convenient;

2. the air injection pipe and the hot air pipe are arranged, so that the sand can be dried, the speed of separating the sand from the concrete block is increased, and the separation effect of the sand is improved;

3. the setting of buffer plate and elastic component for the difficult quilt rupture of brushing piece, and be convenient for brush and remove the piece embedding annular chamber and inlay and establish the inslot.

Drawings

FIG. 1 is a schematic cross-sectional view of a prior art sand separator;

FIG. 2 is a schematic sectional view of the whole of the embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of an embodiment of the present invention showing a spacing assembly;

FIG. 4 is a schematic diagram illustrating a stop collar according to an embodiment of the present invention;

fig. 5 is a partially enlarged schematic view at a in fig. 2.

In the figure: 1. a support; 11. a barrel body; 12. a cover body; 121. a bolt; 13. a feed hopper; 14. a discharge hopper; 15. a valve; 16. a stirring paddle; 2. a stirring assembly; 21. a mixing drum; 211. a gas ejector tube; 212. a through groove; 213. clamping the ball; 214. an annular groove; 215. a threaded ring; 216. pushing the surface; 22. a connecting pipe; 23. a branch pipe; 231. a mating gear; 232. an inner gear ring; 24. crushing the leaves; 25. a fixed cylinder; 26. a drive assembly; 261. a drive motor; 262. a driving gear; 263. a driven gear; 27. a limiting component; 271. a limiting ring; 272. a fixing ring; 273. embedding a groove; 274. an annular cavity; 275. a notch; 276. an inclined surface; 277. a buffer plate; 278. a guide surface; 279. a spring; 28. a channel; 3. filtering with a screen; 31. a blanking port; 32. brushing off the part; 321. a mating surface; 33. a support plate; 34. a through groove; 35. a cylinder; 36. a sealing plate; 37. a sealing groove; 38. a limiting plate; 39. a limiting cavity; 4. a hot gas pipe; 41. and (4) a sealing ring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in FIG. 2, a sand-stone separator comprises a bracket 1, a barrel 11 fixed on the bracket 1 and having an upward opening, and a cover 12 mounted on the top of the barrel 11 through a plurality of bolts 121, wherein a feed hopper 13 is arranged on the cover 12, a discharge hopper 14 is arranged on the lower side of the barrel 11, and valves 15 are mounted on the feed hopper 13 and the discharge hopper 14.

As shown in fig. 2, a stirring assembly 2 is arranged in the barrel 11, the stirring assembly 2 includes a stirring barrel 21 rotatably connected to the cover 12, a plurality of connecting pipes 22 circumferentially arranged on the outer wall of the stirring barrel 21, and a plurality of branch pipes 23 communicated with the corresponding connecting pipes 22 and extending in the vertical direction, and a plurality of crushing blades 24 are fixed on the outer walls of the stirring barrel 21 and all the branch pipes 23; a fixed cylinder 25 for the rotation and embedding of the mixing cylinder 21 is fixed on the inner wall of the bottom of the barrel body 11, and the fixed cylinder 25 extends along the vertical direction and is used for ensuring the stability of the mixing cylinder 21.

As shown in fig. 2, the cover 12 is provided with a driving assembly 26, the driving assembly 26 includes a driving motor 261 fixed on the upper surface of the cover 12, and a driving gear 262 is fixedly sleeved outside an output shaft of the driving motor 261; the top end of the mixing drum 21 extends out of the barrel 11, and a driven gear 263 is fixedly sleeved outside the top end, and the driven gear 263 is meshed with the driving gear 262. When the driving gear 262 is driven by the driving motor 261 to rotate, the driven gear 263 and the mixing drum 21 will rotate in a driven manner, and the crushing blades 24 will crush and mix the concrete.

As shown in figure 2, a filter screen 3 is fixed on the inner wall of the barrel body 11, the mixing drum 21 penetrates through the filter screen 3, sand in the smashed concrete passes through the filter screen 3 and falls into the bottom of the barrel body 11, and stones and waste residues remain on the surface of the filter screen 3, so that the separation of sand and stone is realized.

As shown in fig. 2 and 3, the upper surface of the filter screen 3 is provided with a blanking port 31, a brushing part 32 extending along the radial direction of the barrel 11 is inserted into the blanking port 31, and the brushing part 32 comprises a brush handle and a plurality of bristles fixed on the lower surface of the brush handle; a supporting plate 33 is abutted to the lower side of the brushing part 32, a through groove 34 extending along the vertical direction is formed in the outer wall of the barrel body 11, and the supporting plate 33 is embedded in the through groove 34 in a sliding manner; the outer wall of the barrel body 11 is fixed with a lifting piece, the lifting piece is a cylinder 35, and a piston rod of the cylinder 35 extends in the vertical direction and is fixedly connected to the supporting plate 33.

As shown in fig. 3 and 4, the stirring assembly 2 is provided with a limiting assembly 27, the limiting assembly 27 includes a limiting ring 271 fixedly sleeved on the outer side of the stirring cylinder 21 and a fixing ring 272 fixed on the inner wall of the barrel body 11, the lower surface of the limiting ring 271 is circumferentially provided with a plurality of embedding grooves 273, the fixing ring 272 is in a U-shape and is provided with an opening facing the stirring cylinder 21, the fixing ring 272 is provided with an annular cavity 274 and a notch 275, and the notch 275 is arranged on the lower surface of the fixing ring 272.

When stones and waste materials on the filter screen 3 need to be cleaned, the supporting plate 33 is driven to ascend through the air cylinder 35, and the supporting plate 33 pushes the brushing part 32 to ascend so as to expose the blanking port 31; when the supporting plate 33 is slidably inserted into the notch 275, the brushing member 32 is inserted into the insertion groove 273 and inserted into the annular cavity 274 through the notch 275, and at this time, the driving motor 261 drives the mixing drum 21 to rotate, so that the brushing member 32 brushes the stones and the waste residues on the filter screen 3 into the blanking port 31.

As shown in FIG. 3, a channel 28 is fixed on the inner wall of the barrel 11 and is disposed at the lower side of the filter screen 3, one end of the channel 28 is communicated with the blanking port 31, the other end of the channel 28 penetrates out of the barrel 11, and the stones and the waste slag falling into the blanking port 31 are discharged out of the barrel 11 through the channel 28.

As shown in fig. 3, the bottom inner wall and the top outer wall of the fixing ring 272 are both provided with inclined surfaces 276 inclined toward the mixing drum 21, so that sand and slag are not easily left on the fixing ring 272; and the lower surface of the brushing part 32 is provided with a matching surface 321 which is attached to the inclined surface 276 on the inner wall of the bottom of the fixing ring 272, thereby improving the stability of the brushing part 32 in the rotating process.

As shown in FIG. 3, the upper and lower sides of the supporting plate 33 are fixed with sealing plates 36, the upper and lower walls of the through groove 34 are provided with sealing grooves 37, and two sets of sealing plates 36 are slidably inserted into the corresponding sealing grooves 37, so that sand and waste materials cannot be discharged out of the barrel 11 through the through groove 34.

As shown in fig. 4, two sets of buffer plates 277 and elastic members are symmetrically disposed in all the embedding grooves 273, the two sets of buffer plates 277 located in the same embedding groove 273 are disposed at two sides of the brushing-off member 32, all the buffer plates 277 are slidably embedded in the corresponding embedding grooves 273, and the lower surfaces of the two sets of buffer plates 277 are provided with guide surfaces 278 inclined toward the brushing-off member 32; all the elastic members are springs 279, and both ends of all the springs 279 are fixedly connected to the corresponding buffer plate 277 and the groove wall of the embedding groove 273 respectively.

As shown in fig. 3, two sets of limiting plates 38 extending in the vertical direction are disposed between the fixing ring 272 and the filter screen 3, the upper and lower ends of the two sets of limiting plates 38 are respectively abutted against the lower surface of the fixing ring 272 and the upper surface of the filter screen 3, and the two sets of limiting plates 38 are fixed on the inner wall of the barrel 11 and jointly enclose a limiting cavity 39 for the brushing part 32 to be slidably inserted.

When stones and waste residues on the filter screen 3 need to be cleaned, the air cylinder 35 drives the supporting plate 33 to ascend, the supporting plate 33 pushes the brushing part 32 to ascend into the limiting cavity 39 and tightly abut against the guide surface 278, and the brushing part 32 pushes the buffer plate 277 to move through the guide surface 278; when the supporting plate 33 is lifted to close the notch 275, the brushing part 32 will be inserted into the annular cavity 274 and the insertion groove 273, so that the brushing part 32 can be inserted into the insertion groove 273 even if the insertion groove 273 is not aligned with the blanking opening 31.

When the wiper 32 slides out of the notch 275, the buffer plate 277 abuts against the wiper 32 and causes the spring 279 to be compressed, and the position of the buffer plate 277 is kept unchanged while the spring 279 is continuously compressed, so that the buffer plate 277 and the elastic member give the wiper 32 a certain falling time, so that the wiper 32 is not easily broken.

As shown in fig. 2, a hot air pipe 4 is arranged in the top end of the mixing drum 21, a sealing ring 41 is fixedly sleeved outside the hot air pipe 4, and the sealing ring 41 is rotatably embedded in the mixing drum 21; all the connecting pipes 22 are communicated with the mixing drum 21, and the outer walls of the mixing drum 21 and all the branch pipes 23 are communicated with a plurality of gas spraying pipes 211. The air injection pipe 211 sprays hot air into the barrel body 11, sand can be dried, and the hot air can be directly sprayed onto a concrete block, so that the speed of separating the sand from the concrete block is increased, and the sand separating effect is improved.

As shown in fig. 2, all the branch pipes 23 are rotatably connected to the corresponding connecting pipes 22, the matching gears 231 are fixedly sleeved outside all the branch pipes 23, and the inner wall of the barrel body 11 is fixed with an inner gear ring 232 engaged with all the matching gears 231. In the process that the driving motor 261 drives the mixing drum 21 to rotate, all the connecting pipes 22 are driven to rotate, and all the branch pipes 23 rotate relative to the axes of the branch pipes, so that the crushing and mixing effects of the crushing blades 24 on concrete are further improved, and the separation effect of the hot air pipe 4 on sand is improved.

As shown in fig. 5, two sets of through grooves 212 are circumferentially formed in the outer wall of the mixing drum 21, the two sets of through grooves 212 are respectively embedded with the clamping balls 213 in a rolling manner, one side of each of the two sets of clamping balls 213, which is far away from the sealing ring 41, penetrates out of the corresponding through groove 212, and the outer wall of the sealing ring 41 is provided with an annular groove 214; a threaded ring 215 is connected to the outer wall of the mixing drum 21 in a threaded manner, and a pushing surface 216 is arranged on one end of the threaded ring 215 facing the limiting ball. When the screw ring 215 is rotated to press the pushing surface 216 against the two sets of catching balls 213, the two sets of catching balls 213 will be pushed to catch into the annular groove 214, so that the hot air tube 4 is not easily disengaged from the mixer drum 21.

The implementation principle of the embodiment is as follows: in the process of separating the sand and the stone, firstly, concrete with the sand and the stone is poured into the barrel body 11 through the feed hopper 13; the driving motor 261 drives the driving gear 262 to rotate, the driven gear 263, the mixing drum 21 and the connecting pipe 22 are driven to rotate, all the branch pipes 23 rotate relative to the axis of the branch pipes due to the meshing of the matching gear 231 and the inner gear ring 232, and all the crushing blades 24 crush and mix the concrete; the sand will fall through the filter screen 3 to the bottom of the barrel 11, and the stones and the waste residues will remain on the surface of the filter screen 3, thereby realizing the separation of the sand and the stone.

In the rotating process of the mixing drum 21 and the branch pipes 23, hot air is sprayed out of all the air spraying pipes 211, and the hot air can dry sand and can be directly sprayed onto concrete blocks, so that the speed of separating the sand from the concrete blocks is increased, and the separation effect of the sand is improved.

When the valve 15 on the discharge hopper 14 is opened, sand will be discharged through the discharge hopper 14; when stones and waste materials on the filter screen 3 need to be cleaned, the driving motor 261 is turned off, the supporting plate 33 is driven to ascend through the air cylinder 35, the supporting plate 33 pushes the brushing part 32 to ascend into the limiting cavity 39, and the blanking port 31 is exposed; the brushing member 32 located in the limiting cavity 39 will abut against the guiding surface 278 and push the buffer plate 277 to move through the guiding surface 278 so that the corresponding spring 279 is compressed; when the supporting plate 33 rises to close the gap 275, the brushing member 32 is inserted into the annular cavity 274 and the insertion groove 273; the compressed springs 279 will then spring back and push the stripper 32 through the buffer plate 277 to slide against the other buffer plate 277, and both sets of springs 279 will be compressed and urge both sets of buffer plates 277 to clamp together against the stripper 32.

Then, the driving motor 261 is started, the driving gear 262, the driven gear 263 and the stirring cylinder 21 are driven to drive and drive the brushing part 32 to rotate in the annular cavity 274, the brushing part 32 brushes the stones and the waste residues on the filter screen 3 into the blanking port 31 in the rotating process, and the stones and the waste residues falling into the blanking port 31 are discharged out of the barrel body 11 through the channel 28.

When no stones and waste residues are discharged from the channel 28, the supporting plate 33 is driven by the air cylinder 35 to descend and separate from the notch 275, when the driving motor 261 drives the brushing part 32 to move to the position right above the blanking opening 31, the brushing part 32 descends due to gravity and slides out of the notch 275, the brushing part 32 sliding out of the notch 275 slides out of the annular cavity 274 and the embedding groove 273 and is embedded into the blanking opening 31, and the blanking opening 31 is closed, so that sand is not easy to penetrate through the blanking opening 31 and enter the channel 28 when the stirring assembly 2 stirs concrete.

When the brushing member 32 slides out of the notch 275, the stirring cylinder 21 is still in a rotating state, so the buffer plate 277 abuts against the brushing member 32 and urges the elastic member to be compressed, and the position of the buffer plate 277 is kept unchanged in the process of continuously compressing the elastic member, so the buffer plate 277 and the elastic member give a certain falling time to the brushing member 32, so that the brushing member 32 is not easy to break and the brushing member 32 is convenient to fall into the material falling opening 31.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.