A photoelectric coal and gangue sorting device, comprising a support frame (1), a coal and gangue separation screen body (2), a sealing upper cover (3), a sieving mechanism (4), a driving mechanism (5), a separating and conveying mechanism (6), a positioning plate (7) and a sorting unit (8), wherein the coal and gangue separation screen body (2), on the top of which is provided with the sealing upper cover (3) and inside of which is provided with the separating and conveying mechanism (6), is fixedly installed on one side of the support frame (1) by means of bolts;
- the side wall of the positioning plate (7), which is arranged above the separating and conveying mechanism (6), is fixed to the inner wall of the coal and gangue separation screen body (2) by means of spot welding;
- the sorting unit (8) is installed on the right side of the separating and conveying mechanism (6) inside the coal and gangue separation screen body (2);
- and the top of the support frame (1) is provided with the sieving mechanism (4) at the bottom of which the driving mechanism (5) is installed;
- an arc hole (11), into which a linkage rod (12) is inserted, is formed on the top of the support frame (1), a reset spring (13) is welded to the outer wall of the linkage rod (12), the top of the reset spring (13) is welded to the top of the arc hole (11), and a reinforcing plate (14) is welded to the inner side of the support frame (1);
- the sieving mechanism (4) comprises a sieving hopper (41) with one end welded to an end face of the linkage rod (12) and the other end connected to a top corner of the coal and gangue separation screen body (2) by means of a shaft lever, a sieve (42) is welded at the middle position of the inner wall of the sieving hopper (41), and a leakage hole (43) is formed at the bottom of the sieving hopper (41);
- the driving mechanism (5) comprises shaft brackets (51) symmetrically welded to an upper end face of the reinforcing plate (14), a rotating shaft (52) is arranged between the two shaft brackets (51) and cams (53) are symmetrically welded to the outer wall of the rotating shaft (52), a first motor (54) is arranged on one side of the shaft bracket (51) and fixed on an upper end face of the reinforcing plate (14) by means of a motor fixing frame, and an output shaft of the first motor (54) is connected to the rotating shaft (52) by means of a synchronous belt;
- the separating and conveying mechanism (6) comprises fixing side plates (61) bolted to the bottom end inside the coal and gangue separation screen body (2), driving discs (63) are symmetrically welded to the outer wall of a rotating shaft (62) arranged between the two fixing side plates (61), semicircular grooves are provided on outer walls of the driving discs (63) at equal intervals in a circumferential direction, an upper end of the semicircular grooves is provided with a drive rod (64) of which the outer wall is sleeved with supporting assemblies (69) side by side, ends of any two adjacent drive rods (64) are connected by means of a rubber block (65), driving gears (66) are welded to outer walls of the two rotating shafts (62) and connected by means of a driving chain (67), the second motor (68) is fixed on the outer wall of the coal and gangue separation screen body (2) by means of a motor fixing frame, and the output shaft of the second motor (68) penetrates through the coal and gangue separation screen body (2) and is connected to the rotating shaft (62);
- a supporting assembly (69) comprises one or more supporting blocks (691) sleeved on the outer wall of the drive rod (64) side by side, a tension spring (694) is arranged between rectangular grooves (693) symmetrically provided on two side walls of the one or more supporting blocks (691), T-shaped rods (697) are arranged on inner walls of convex grooves (696) formed at the top of a bearing block (691) at equal intervals, supporting springs (698) are symmetrically provided on one end of the T-shaped rod (697) located in the convex grooves (696), a supporting plate (695) is welded to the top of the T-shaped rod (697), a connecting plate (692) is inserted into the gap between a lower end face of the supporting plate (695) and an upper end face of the one or more supporting blocks (691), a through hole is formed in the T-shaped rod (697) and located at the gap between the supporting plate (695) and the one or more supporting blocks (691), and a linkage unit (699) is provided on the inner wall of the through hole;
- a track groove (6951) is formed at the top of the supporting plate (695) located at the extreme ends of the drive rod (64), and an arc track plate (71) is welded to the inner wall of the positioning plate (7) and forms a matching structure with the track groove (6951);
- when the supporting assembly (69) moves to a certain distance, the track groove (6951) at the top of the supporting plate (695) located at the extreme ends of the drive rod (64) will drive into the arc track plate (71), which then applies an axial tension to the rotating supporting plate (695);
- as the track groove (6951) drives away from the arc track plate (71), the one or more supporting blocks (691) will be driven to reset along the drive rod (64) under the action of the resilience force generated by the elongation of the tension spring (694).