A multi-bar linkage mechanism based conveyor, comprising a gantry system (1), a multi-bar linkage mechanism based conveyor boom (2), a boom support (3), a first two-drum winch (4), a roller unit (5), a second two-drum winch (6), an automatic control system and a hull (7), wherein the gantry system (1) comprises a gantry, a set of gantry pulleys and a gantry support;
- wherein the multi-bar linkage mechanism based conveyor boom (2) comprises multi-bar linkage mechanisms (201), hydraulic cylinders (202) and pulleys (203), and is in a composite structure of carbon fibers and carbon steel;
- the multi-bar linkage mechanism based conveyor boom (2) is articulated with the boom support (3), the multi-bar linkage mechanism based conveyor boom (2) comprises a plurality of multi-bar linkage mechanisms (201) each having a set of pulleys (203), and each two adjacent multi-bar linkage mechanisms (201) are powered by one hydraulic cylinder (202);
- the multi-bar linkage mechanism (201) comprises, on a single side, eight bars among which:
- a first bar (11) is fixed and the first bars (11) on two opposite sides form a boom, two ends of a second bar (12) are articulated with the first bar (11), a fifth bar (15) and a sixth bar (16), the second bar (12) is articulated with a fourth bar (14) at a position that is 43%-44% of its whole length, two ends of a third bar (13) are articulated with the first bar (11), the fourth bar (14) and a seventh bar (17), two ends of the seventh bar (17) are articulated with the third bar (13), the fourth bar (14) and an eighth bar (18), the seventh bar (17) is articulated with the fifth bar (15) at a position that is 56%-57% of its whole length, two ends of the sixth bar (16) are articulated with the second bar (12), the fifth bar (15) and the eighth bar (18), and the eighth bar (18) can move;
- to realize the movement of the eighth bar (18), the second bar (12) is pushed by a hydraulic cylinder (202), the fourth bar (14) is driven by the second bar (12) so that the third bar (13) moves together, and the fifth bar (15) is driven by the second bar (12) and the third bar (13) so that the seventh bar (17) and the sixth bar (16) that is directly articulated with the second bar (12) can move together, and in this way, the eighth bar (18) is driven to move horizontally;
- the first two-drum winch (4) is connected to the pulleys (203) on the multi-bar linkage mechanism based conveyor boom (2) via a steel wire rope and by a set of gantry pulleys (101) arranged on top of the gantry, a tension sensor (19) is arranged at an end of the steel wire rope, and the pulling of the whole conveyor is controlled by the automatic control system;
- the second two-drum winch (6) is connected to a gantry pulley (102) arranged at an upper end of the gantry via a steel wire rope, a tension sensor (19) is arranged at an end of the steel wire rope, and an angle of pulling of the whole conveyor and the stability of the gantry system (1) are controlled by the automatic control system;
- each multi-bar linkage mechanism (201), serving as an operating unit, of the multi-bar linkage mechanism based conveyor boom (2) can send a signal to a hydraulic cylinder (202) by the control system, so as to control the stretch distance of the multi-bar linkage mechanism based conveyor boom (2);
- the roller unit (5) comprises upper bearing rollers (8) and lower return rollers (9);
- an upper cross-bar and a lower cross-bar are mounted on the first bar (11) of each multi-bar linkage mechanism (201), an upper mounting rack is arranged above the upper cross-bar and on an inner side of the first bar (11), a first upper bearing roller, a second upper bearing roller and a third upper bearing roller which are connected to each other are arranged at an inside upper end of the upper mounting rack, and the first and third upper bearing rollers are arranged obliquely;
- a connection handle (901) is connected above two ends of the lower cross-bar, the connection handle (901) can rotate relatively to the lower cross-bar, and the lower return rollers are arranged on the connection handle (901);
- a carrier is arranged on the first bar (11) at a position above the upper cross-bar, the hydraulic cylinder (202) is arranged above the carrier, the hydraulic cylinder (202) comprises a cylinder and a piston, and the second bar (12) is connected above the piston;
- the pulley (203) is also connected above the second bar (12), the pulley (203) comprises a pulley sheave (231) and a connecting rod (232) by which the pulley sheave (231) is connected above the second bar (12);
- a dual-purpose hole is formed in the middle of the boom support (3), which saves material in light load situations and into which reinforced columns are inserted in heavy load situations;
- and in each two adjacent multi-bar linkage mechanisms (201), the second bar (12) of a multi-bar linkage mechanism with a hydraulic cylinder (202) is connected to the sixth bar (16) of a multi-bar linkage mechanism (201) without a hydraulic cylinder (202) to transfer power.