CN114130648A

CN114130648A - Sandstone sorting device and method

Info

Publication number: CN114130648A
Application number: CN202111388719.3A
Authority: CN
Inventors: 彭广超; 林绵绵; 韩廷文
Original assignee: Yancheng Yanfu Environmental Protection Co ltd
Current assignee: Yancheng Yanfu Environmental Protection Co ltd
Priority date: 2021-11-22
Filing date: 2021-11-22
Publication date: 2022-03-04
Anticipated expiration: 2041-11-22
Also published as: CN114130648B

Abstract

The invention discloses a sand and stone sorting device and a sorting method, relates to the technical field of sand and stone sorting, and aims to solve the problems that when sand and stone are screened on a building at present, the screening effect is not ideal, after the screening is finished, the stones are not easy to clean, manual operation is needed, the labor intensity of workers is increased, and the screening effect of the sand and stone can be influenced under the wet condition. This grit sorting unit and sorting method when screening the grit, can make the grit be located the intermediate position department of screen cloth, then under rotating electrical machines's work, can make the continuous rocking back and forth of screen cloth, and under the elasticity of spring, can vibrate at gliding in-process, guarantee the even screening of grit.

Description

Sandstone sorting device and method

Technical Field

The invention relates to the technical field of sand and stone separation, in particular to a sand and stone separation device and a sand and stone separation method.

Background

The sand refers to loose mixture of sand and gravel, and is usually used in construction, and the requirements for sand are different in the construction process according to different construction requirements, some need thicker sand, and some need fine sand, so that the sand needs to be sorted before use.

But when building at present screens grit, its screening effect is unsatisfactory, and when the screening finishes, the stone is difficult for the clearance, needs manual operation, has increased artificial intensity of labour, and when the sand under the wet condition, can influence the screening effect of grit.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a sand and stone sorting device and a sorting method, which solve the problems that when sand and stone are screened on the existing building, the screening effect is not ideal, after the screening is finished, the stones are not easy to clean, manual operation is needed, the labor intensity of workers is increased, and the screening effect of the sand and stone is influenced when the sand is in a wet condition.

In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a grit sorting unit, includes the box, the bottom of box is the open type, the below front surface of box is provided with the driving piece, and the inside of box is provided with the screening piece, the slag notch has been seted up to a side of box, and the upper surface of box is provided with the feeding piece.

The driving piece comprises a supporting plate, a gear disc is installed on the upper surface of the supporting plate in a rotating mode, an eccentric rod is installed on the rear side of the gear disc in a rotating mode, a rotating motor is installed on the lower surface of the front side of the supporting plate in a fixed mode, an output shaft of the rotating motor rotates to penetrate through the lower surface of the supporting plate and is fixedly connected with a main gear, meshing is conducted between the main gear and the gear disc, and the gear block on the outer surface of the main gear is half.

The screening piece includes a limiting plate, a side intermediate position department fixed mounting of limiting plate has servo motor, servo motor's output shaft rotates and passes a side and the fixedly connected with of limiting plate and arranges sediment piece, the upside of limiting plate rotates and is connected with the spill frame, the inside of spill frame is provided with the screen cloth, the inside piece that opens and shuts that is provided with in one side of screen cloth, the downside of limiting plate is provided with the regulating part, two corners in below one side of limiting plate all run through slidable mounting and have the guiding axle, the both ends of guiding axle are connected with the inside both sides face of box respectively, and the surface of guiding axle is provided with the dog near the opposite side position department of limiting plate, slidable mounting is cup jointed to the surface of guiding axle has the spring, the both ends of spring are connected with one side of limiting plate and one side of dog respectively.

Preferably, the regulating part includes the dead lever of horizontal connection in box rear surface intermediate position department, the one end upper surface of dead lever runs through to rotate and installs the bull stick, the upper and lower end difference fixedly connected with disc one and disc two of bull stick, fixed surface is connected with the protruding axle on the rear side of disc two, the sliding tray with protruding axle looks adaptation is seted up to the downside of limiting plate, the upper end embedding slidable mounting of protruding axle is in the inside of sliding tray.

Preferably, the other end of the eccentric rod is rotatably connected to the edge of the lower surface of the rear side of the first disc, a movable groove corresponding to the eccentric rod is formed in the front surface of the box body, and the eccentric rod penetrates through the inner portion of the movable groove in a sliding mode.

Preferably, the inside of the slag discharging port is provided with a second material guide plate in an upward inclined manner, the second material guide plate is positioned below one side of the screen, a first material guide plate is installed on one side surface inside the box body in a downward inclined manner, and the other side of the first material guide plate is positioned in the middle of the inside of the box body.

Preferably, the slag discharging part comprises a rotary table fixedly connected to an output shaft of the servo motor, an eccentric shaft is connected to one side above the rotary table, a groove plate is sleeved and slidably mounted on the outer surface of the eccentric shaft, an adjusting rod is rotatably mounted at the middle position of the upper side of the groove plate, and the other end of the adjusting rod is rotatably connected to the lower surface of the other side of the screen.

Preferably, the fixed axle is all run through to install on the both ends upper surface of recess board, the equal fixedly connected with stopper in both ends of fixed axle, one side of stopper is connected with the side of limiting plate.

Preferably, the opening and closing piece is including rotating the apron of connecting in spill frame one side, the surface all is connected with the protecting crust around the inside of one side of spill frame, two the equal fixed mounting in inside of protecting crust has the pneumatic cylinder, the output shaft of pneumatic cylinder slides the inner wall of passing the protecting crust and rotates and be connected with the regulating spindle, the other end of regulating spindle rotates and connects in one side of apron.

Preferably, the feeding part comprises a vertical plate, a conveying cylinder is horizontally connected to one side above the vertical plate, a feeding hole is formed in the upper surface of one end of the conveying cylinder, a discharging hole is formed in the lower surface of the other end of the conveying cylinder, and the lower side of the discharging hole is connected with the upper surface of the box body and communicated with the inside of the box body.

Preferably, a conveying motor is fixedly mounted on the other side of the upper portion of the vertical plate, an output shaft of the conveying motor is arranged inside the conveying cylinder and is horizontally connected with an auger, the other end of the auger is rotatably connected to the inner wall of the other end of the conveying cylinder, a shell is arranged on the lower side of the conveying cylinder, a heat conduction steel plate is arranged at the position, located inside the shell, of the lower side of the conveying cylinder, and a heating pipe is horizontally connected inside the shell.

Preferably, the sand sorting device comprises the following steps:

s1, feeding: pouring the gravel from the feeding hole, driving the packing auger to rotate by the conveying motor, conveying the gravel by the packing auger, enabling the heating pipe in the shell to work in the conveying process, heating the heating pipe, conducting heat of the heating pipe to the gravel by the heat conducting steel plate, drying the gravel, then dropping the gravel onto a first material guide plate in the box body from the discharging hole, and then sliding the gravel onto a middle position on the screen cloth from the first material guide plate;

s2, screening: the rotating motor drives the main gear to rotate, the main gear drives the gear disc meshed with the main gear to rotate, the gear disc drives the eccentric rod to do eccentric motion, the eccentric rod drives the first disc to rotate, the disc drives the rotating rod to rotate, the rotating rod drives the second disc to rotate, the convex shaft on the second disc can slide in the sliding groove on the lower side of the limiting plate, under the elasticity of the spring, the convex shaft can drive the limiting plate to slide on the guide shaft, the concave frame is driven to move, when the tooth block on the main gear leaves the gear disc, the main gear and the gear disc can lose meshing force, the limiting plate can be reset by the spring, and then under the repeated rotation of the main gear, the concave frame can continuously slide back and forth, so that the gravel is screened; the screened sand falls from the bottom of the box body, and the stones are left on the screen mesh;

s3, blanking: the power of switch-on servo motor, servo motor drives the carousel and rotates, the carousel drives the eccentric shaft and is eccentric motion, the eccentric shaft will drive the recess board and slide on the fixed axle, under the swing joint of adjusting the pole, it will drive the spill frame and rotate to adjust the pole, and then drive the screen cloth and rotate, make the screen cloth rotate the position of slope, later make the inside pneumatic cylinder work of protecting crust, the pneumatic cylinder drives the regulating spindle and removes, the regulating spindle drives the apron and rotates, make the apron give the spill frame and open, and then make the stone fall into on the inside stock guide two of row's cinder notch, slide down from stock guide two at last, accomplish the stone and arrange material work.

Advantageous effects

The invention provides a sand and stone sorting device and a sorting method, which have the following beneficial effects compared with the prior art:

1. this grit sorting unit and sorting method when screening the grit, can make the grit be located the intermediate position department of screen cloth, then under the work of rotating electrical machines, can make the continuous back and forth rocking of screen cloth, and under the elasticity of spring, can vibrate at gliding in-process, guarantee the even screening of grit, improve the screening effect to the grit, can play simultaneously and prevent stifled effect.

2. This grit sorting unit and sorting method, after the grit screening finishes, can accomplish the ejection of compact work to the stone after the screening automatically, convenient and fast need not the manual work and clears up, and then has reduced artificial intensity of labour, has improved work efficiency.

3. This grit sorting unit and sorting method, before screening the grit, can play fine stoving work to the grit, prevent that the grit from too moist and having influenced its screening effect.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic exploded view of the internal structure of the case of the present invention;

FIG. 3 is a schematic view of the driving member of the present invention;

FIG. 4 is a schematic view of the screen of the present invention;

FIG. 5 is a schematic structural view of the slag discharging member of the present invention;

FIG. 6 is a schematic structural view of a feed member of the present invention;

fig. 7 is an internal schematic view of the delivery cartridge structure of the present invention.

In the figure: 1. a box body; 101. a first material guide plate; 2. a drive member; 21. a support plate; 22. a gear plate; 23. an eccentric rod; 24. a rotating electric machine; 25. a main gear; 3. screening the parts; 31. a limiting plate; 32. a servo motor; 33. a slag discharging part; 331. a turntable; 332. an eccentric shaft; 333. a groove plate; 334. adjusting a rod; 335. a fixed shaft; 336. a limiting block; 34. a concave frame; 35. screening a screen; 36. opening and closing the piece; 361. a cover plate; 362. a protective shell; 363. a hydraulic cylinder; 364. an adjustment shaft; 37. an adjustment member; 371. fixing the rod; 372. a rotating rod; 373. a first disc; 374. a second disc; 375. a protruding shaft; 38. a guide shaft; 39. a stopper; 310. a spring; 4. a slag discharge port; 41. a second material guide plate; 5. a feeding member; 51. a vertical plate; 52. a delivery cartridge; 53. a feed inlet; 54. a discharge port; 55. a conveying motor; 56. a housing; 57. a packing auger; 58. a heat conductive steel plate; 59. heating the tube.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, the invention provides a sand and stone sorting device, which comprises a box body 1, wherein the bottom of the box body 1 is open, a driving part 2 is arranged on the front surface of the lower part of the box body 1, a screening part 3 is arranged inside the box body 1, a slag discharge port 4 is formed in one side surface of the box body 1, a feeding part 5 is arranged on the upper surface of the box body 1, a material guide plate II 41 is obliquely arranged in the slag discharge port 4 upwards, the material guide plate II 41 is positioned below one side of a screen 35, a material guide plate I101 is obliquely arranged on one side surface of the inner part of the box body 1 downwards, and the other side of the material guide plate I101 is positioned in the middle position of the inner part of the box body 1.

Referring to fig. 3-4, in the embodiment of the present invention, the driving member 2 includes a supporting plate 21, a gear plate 22 is rotatably mounted on an upper surface of the supporting plate 21, an eccentric rod 23 is rotatably mounted on an upper surface of a rear side of the gear plate 22, a rotating motor 24 is fixedly mounted on a lower surface of a front side of the supporting plate 21, an output shaft of the rotating motor 24 rotatably penetrates through a lower surface of the supporting plate 21 and is fixedly connected with a main gear 25, the main gear 25 is engaged with the gear plate 22, a half of teeth block on an outer surface of the main gear 25 is provided, the screening member 3 includes a limiting plate 31, a servo motor 32 is fixedly mounted at a middle position of one side surface of the limiting plate 31, an output shaft of the servo motor 32 rotatably penetrates through one side surface of the limiting plate 31 and is fixedly connected with a slag discharging member 33, a concave frame 34 is rotatably connected to an upper side of the limiting plate 31, a screen 35 is disposed inside the concave frame 34, an opening member 36 is disposed inside one side of the screen 35, an adjusting piece 37 is arranged at the lower side of the limit plate 31, two corners at one side below the limit plate 31 are respectively provided with a guide shaft 38 in a penetrating and sliding manner, two ends of the guide shaft 38 are respectively connected with two side surfaces inside the box body 1, a stop 39 is arranged at the position, close to the other side of the limit plate 31, of the outer surface of the guide shaft 38, a spring 310 is sleeved and installed in a sliding manner on the outer surface of the guide shaft 38, two ends of the spring 310 are respectively connected with one side of the limit plate 31 and one side of the stop 39, the adjusting piece 37 comprises a fixed rod 371 horizontally connected at the middle position of the rear surface of the box body 1, a rotating rod 372 is rotatably installed at the upper surface of one end of the fixed rod 371 in a penetrating manner, a first disk 373 and a second disk 374 are respectively and fixedly connected with the upper end of the rotating rod 372, a convex shaft 375 is fixedly connected with the upper surface at the rear side of the second disk 374, a sliding groove matched with the convex shaft 375 is formed at the lower side of the limit plate 31, and the upper end of the convex shaft 375 is embedded and installed in the sliding manner, the other end of eccentric rod 23 rotates to be connected in the rear side lower surface edge of disc 373, the movable groove corresponding with eccentric rod 23 has been seted up to the front surface of box 1, eccentric rod 23 slides and passes the inside in movable groove, open and close piece 36 is including rotating the apron 361 of connecting in concave frame 34 one side, the inside front and back surface in one side of concave frame 34 all is connected with protecting crust 362, the equal fixed mounting in inside of two protecting crust 362 has pneumatic cylinder 363, the output shaft of pneumatic cylinder 363 slides and passes the inner wall of protecting crust 362 and rotates and be connected with regulating spindle 364, the other end of regulating spindle 364 rotates and connects in one side of apron 361.

Referring to fig. 5, in the embodiment of the present invention, the residue discharging member 33 includes a rotating disc 331 fixedly connected to an output shaft of the servo motor 32, an eccentric shaft 332 is connected to one side above the rotating disc 331, a groove plate 333 is slidably mounted on an outer surface of the eccentric shaft 332, an adjusting rod 334 is rotatably mounted at a middle position of an upper side of the groove plate 333, another end of the adjusting rod 334 is rotatably connected to a lower surface of the other side of the screen 35, a fixing shaft 335 is mounted on upper surfaces of two ends of the groove plate 333 in a penetrating manner, two ends of the fixing shaft 335 are fixedly connected to a limiting block 336, one side of the limiting block 336 is connected to a side surface of the limiting plate 31, and the fixing shaft 335 plays a role in stabilizing the groove plate 333.

Referring to fig. 6-7, in the embodiment of the present invention, the feeding member 5 includes a vertical plate 51, a conveying cylinder 52 is horizontally connected to one side above the vertical plate 51, a feeding port 53 is disposed on an upper surface of one end of the conveying cylinder 52, a discharging port 54 is disposed on a lower surface of the other end of the conveying cylinder 52, a lower side of the discharging port 54 is connected to an upper surface of the box body 1 and communicated with an inside of the box body 1, a conveying motor 55 is fixedly mounted on the other side above the vertical plate 51, an output shaft of the conveying motor 55 is disposed inside the conveying cylinder 52 and horizontally connected to an auger 57, the other end of the auger 57 is rotatably connected to an inner wall of the other end of the conveying cylinder 52, a casing 56 is disposed on the lower side of the conveying cylinder 52, a heat conducting steel plate 58 is disposed on a position inside of the casing 56, and a heating pipe 59 is horizontally connected inside the casing 56.

In the embodiment of the invention, the sand and stone sorting device comprises the following steps:

s1, feeding: pouring the gravel from the feeding hole 53, driving the packing auger 57 to rotate by the conveying motor 55, conveying the gravel by the packing auger 57, enabling the heating pipe 59 in the shell 56 to work in the conveying process, heating the heating pipe 59, conducting the heat of the heating pipe 59 to the gravel by the heat conducting steel plate 58, drying the gravel, then dropping the gravel onto the first material guide plate 101 in the box body 1 from the discharging hole 54, and then sliding the gravel onto the middle position on the screen 35 from the first material guide plate 101;

s2, screening: the rotating motor 24 drives the main gear 25 to rotate, the main gear 25 drives the gear disc 22 engaged with the main gear 25 to rotate, the gear disc 22 drives the eccentric rod 23 to do eccentric motion, the eccentric rod 23 drives the disc 373 to rotate, the disc 373 drives the rotating rod 372 to rotate, the rotating rod 372 drives the disc 374 to rotate, the protruding shaft 375 on the disc 374 slides in the sliding groove on the lower side of the limiting plate 31, under the elasticity of the spring 310, the protruding shaft 375 drives the limiting plate 31 to slide on the guide shaft 38 and further drives the concave frame 34 to move, when the tooth blocks on the main gear 25 leave the gear disc 22, the main gear 25 and the gear disc 22 lose the engaging force, the spring 310 resets the limiting plate 31, and then under the repeated rotation of the main gear 25, the concave frame 34 continuously slides back and forth, so as to perform the screening work on the gravels; the screened sand falls from the bottom of the box body 1, and stones are left on the screen 35;

s3, blanking: the power supply of the servo motor 32 is connected, the servo motor 32 drives the rotating disc 331 to rotate, the rotating disc 331 drives the eccentric shaft 332 to do eccentric motion, the eccentric shaft 332 drives the groove plate 333 to slide on the fixed shaft 335, the adjusting rod 334 drives the concave frame 34 to rotate under the movable connection of the adjusting rod 334, the screen 35 is further driven to rotate, the screen 35 is rotated to an inclined position, then the hydraulic cylinder 363 inside the protective shell 362 works, the hydraulic cylinder 363 drives the adjusting shaft 364 to move, the adjusting shaft 364 drives the cover plate 361 to rotate, the cover plate 361 opens the concave frame 34, the stones fall onto the second material guide plate 41 inside the slag discharge port 4, and finally the stones fall off from the second material guide plate 41, and the work of the stones is completed.

In the above, the servo motor 32 is CH/V, the hydraulic cylinder 363 is KJ/I, the rotating motor 24 is GH-98, and the conveying motor 55 is NJ-98.

And those not described in detail in this specification are well within the skill of those in the art.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Claims

1. The utility model provides a grit sorting unit, includes box (1), the bottom of box (1) is open type, its characterized in that: a driving piece (2) is arranged on the front surface below the box body (1), a screening piece (3) is arranged inside the box body (1), a slag discharge port (4) is formed in one side surface of the box body (1), and a feeding piece (5) is arranged on the upper surface of the box body (1);

the driving piece (2) comprises a support plate (21), a gear disc (22) is rotatably mounted on the upper surface of the support plate (21), an eccentric rod (23) is rotatably mounted on the upper surface of the rear side of the gear disc (22), a rotating motor (24) is fixedly mounted on the lower surface of the front side of the support plate (21), an output shaft of the rotating motor (24) rotatably penetrates through the lower surface of the support plate (21) and is fixedly connected with a main gear (25), the main gear (25) is meshed with the gear disc (22), and the number of gear blocks on the outer surface of the main gear (25) is half;

the screening part (3) comprises a limiting plate (31), a servo motor (32) is fixedly mounted at a side middle position of the limiting plate (31), an output shaft of the servo motor (32) rotates to penetrate a side face of the limiting plate (31) and is fixedly connected with a slag discharging part (33), a concave frame (34) is rotatably connected to the upper side of the limiting plate (31), a screen (35) is arranged inside the concave frame (34), an opening and closing part (36) is arranged inside one side of the screen (35), an adjusting part (37) is arranged on the lower side of the limiting plate (31), two corners on one side below the limiting plate (31) are respectively provided with a guide shaft (38) in a penetrating and sliding mode, two ends of the guide shaft (38) are respectively connected with the inside of the box body (1), and a stop block (39) is arranged at the position of the other side of the outer surface of the guide shaft (38) close to the limiting plate (31), the outer surface of guiding axle (38) cup joints slidable mounting has spring (310), the both ends of spring (310) are connected with one side of limiting plate (31) and one side of dog (39) respectively.

2. A sand sorting apparatus according to claim 1, wherein: regulating part (37) include dead lever (371) of horizontal connection in box (1) rear surface intermediate position department, the one end upper surface of dead lever (371) runs through to rotate and installs bull stick (372), the upper and lower end difference fixedly connected with disc (373) and two (374) of bull stick (372), fixed surface is connected with protruding axle (375) on the rear side of two (374) discs, the sliding tray with protruding axle (375) looks adaptation is seted up to the downside of limiting plate (31), the upper end embedding sliding mounting of protruding axle (375) is in the inside of sliding tray.

3. A sand sorting apparatus according to claim 2, wherein: the other end of the eccentric rod (23) is rotatably connected to the edge of the lower surface of the rear side of the first disc (373), a movable groove corresponding to the eccentric rod (23) is formed in the front surface of the box body (1), and the eccentric rod (23) penetrates through the inner portion of the movable groove in a sliding mode.

4. A sand sorting apparatus according to claim 1, wherein: the inside tilt up of row's cinder notch (4) is provided with stock guide two (41), stock guide two (41) are located one side below of screen cloth (35), stock guide one (101) are installed to the inside side downward sloping of box (1), the opposite side of stock guide one (101) is located the inside intermediate position department of box (1).

5. A sand sorting apparatus according to claim 1, wherein: the slag discharging part (33) comprises a rotary disc (331) fixedly connected to an output shaft of the servo motor (32), an eccentric shaft (332) is connected to one side of the upper portion of the rotary disc (331), a groove plate (333) is installed on the outer surface of the eccentric shaft (332) in a sleeved and sliding mode, an adjusting rod (334) is installed at the middle position of the upper side of the groove plate (333) in a rotating mode, and the other end of the adjusting rod (334) is connected to the lower surface of the other side of the screen (35) in a rotating mode.

6. A sand sorting device according to claim 5, characterised in that: the both ends upper surface of recess board (333) all runs through and installs fixed axle (335), the equal fixedly connected with stopper (336) in both ends of fixed axle (335), one side of stopper (336) is connected with the side of limiting plate (31).

7. A sand sorting apparatus according to claim 1, wherein: the opening and closing piece (36) is including rotating apron (361) of connecting in concave frame (34) one side, the inside front and back surface in one side of concave frame (34) all is connected with protecting crust (362), two the inside of protecting crust (362) all fixed mounting has pneumatic cylinder (363), the output shaft of pneumatic cylinder (363) slides and passes the inner wall of protecting crust (362) and rotates and be connected with regulation axle (364), the other end of regulation axle (364) rotates and connects in one side of apron (361).

8. A sand sorting apparatus according to claim 1, wherein: the feeding part (5) comprises a vertical plate (51), a conveying cylinder (52) is horizontally connected to one side above the vertical plate (51), a feeding hole (53) is formed in the upper surface of one end of the conveying cylinder (52), a discharging hole (54) is formed in the lower surface of the other end of the conveying cylinder (52), and the lower side of the discharging hole (54) is connected with the upper surface of the box body (1) and communicated with the interior of the box body.

9. A sand sorting apparatus according to claim 8, wherein: the other side of the upper portion of the vertical plate (51) is fixedly provided with a conveying motor (55), an output shaft of the conveying motor (55) is arranged inside the conveying cylinder (52) and is horizontally connected with an auger (57), the other end of the auger (57) is rotatably connected to the inner wall of the other end of the conveying cylinder (52), a shell (56) is arranged on the lower side of the conveying cylinder (52), a heat conduction steel plate (58) is arranged at the position, located inside the shell (56), of the lower side of the conveying cylinder (52), and a heating pipe (59) is horizontally connected inside the shell (56).

10. A sand sorting device according to any one of claims 1 to 9, wherein the sorting method comprises the steps of:

s1, feeding: pouring the gravel into the feeding hole (53), driving the packing auger (57) to rotate by the conveying motor (55), conveying the gravel by the packing auger (57), enabling the heating pipe (59) in the shell (56) to work in the conveying process, heating the heating pipe (59), conducting heat of the heating pipe (59) to the gravel by the heat conducting steel plate (58), drying the gravel, then enabling the gravel to fall onto the first guide plate (101) in the box body (1) from the discharging hole (54), and then sliding from the first guide plate (101) to the middle position on the screen (35);

s2, screening: the rotating motor (24) drives the main gear (25) to rotate, the main gear (25) drives the gear disc (22) engaged with the main gear to rotate, the gear disc (22) drives the eccentric rod (23) to do eccentric motion, the eccentric rod (23) drives the disc I (373) to rotate, the disc I (373) drives the rotating rod (372) to rotate, the rotating rod (372) drives the disc II (374) to rotate, the convex shaft (375) on the disc II (374) slides in the sliding groove at the lower side of the limiting plate (31), under the elasticity of the spring (310), the convex shaft (375) drives the limiting plate (31) to slide on the guide shaft (38) so as to drive the concave frame (34) to move, when the tooth block on the main gear (25) leaves the gear disc (22), the main gear (25) and the gear disc (22) lose the engaging force, the spring (310) resets the limiting plate (31), and then under the repeated rotation of the main gear (25), the concave frame (34) can continuously slide back and forth, so as to carry out screening work on the sandstone; the screened sand falls from the bottom of the box body (1), and stones are remained on the screen (35);

s3, blanking: the power supply of the servo motor (32) is switched on, the servo motor (32) drives the rotating disc (331) to rotate, the rotating disc (331) drives the eccentric shaft (332) to do eccentric motion, the eccentric shaft (332) drives the groove plate (333) to slide on the fixed shaft (335), under the movable connection of the adjusting rod (334), the adjusting rod (334) can drive the concave frame (34) to rotate, then the screen (35) is driven to rotate, the screen (35) is driven to rotate to an inclined position, then a hydraulic cylinder (363) in the protective shell (362) works, the hydraulic cylinder (363) drives an adjusting shaft (364) to move, the adjusting shaft (364) drives a cover plate (361) to rotate, the cover plate (361) opens the concave frame (34), and then the stones fall onto the second guide plate (41) in the slag discharge port (4), and finally slide down from the second guide plate (41) to finish the stone discharge work.