An adjustable strand threading and lubricating device for prefabricated box girders, comprising an underframe (1), wherein wheels (2) are installed on the underframe (1), a plurality of strand threading boxes (3) are fixedly connected on a top surface of the underframe (1) from bottom to top in a sequentially stacked manner, a feeding side of the strand threading boxes (3) is a rear side, a discharging side of the strand threading boxes (3) is a front side, a plurality of first spline shafts (4) are rotatably installed between left and right side walls of the strand threading boxes (3), axes of the first spline shafts (4) are vertical to the left and right side walls of the strand threading boxes (3), first openings (5) are formed in the left and right side walls of the strand threading boxes (3), the first openings (5) are respectively located above the first spline shafts (4), first sliding blocks (6) are respectively provided and configured to slide up and down in the first openings (5), a plurality of second spline shafts (7) are rotatably installed between two first sliding blocks (6), and axes of the second spline shafts (7) are parallel to the first spline shafts (4);
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- the first spline shafts (4) and the second spline shafts (7) are provided with a plurality of strand threading units for threading steel strands which are slidable along the directions of the axes of the first spline shafts and the second spline shafts, a lubricating unit is arranged on a front side of the strand threading units, and a bundling unit is arranged on a rear side of the strand threading units;
- wherein each of the strand threading units comprises a first box body (8), a top surface of the first box body (8) is open, second openings (9) are formed in left and right side walls of the first box body (8), bearings are installed at the second openings (9), a plurality of first rubber rollers (10) are rotatably installed between two bearings, the first spline shafts (4) pass respectively through the second openings (9) to stretch into the first box body (8), the first rubber rollers (10) respectively slidably sleeve the first spline shafts (4), first spline grooves (11) matched with the first spline shafts (4) are formed in the first rubber rollers (10), first ring grooves (12) are formed in circumferential outer walls of the first rubber rollers (10), and a plurality of first anti-skid stripes (13) are uniformly and fixedly connected into the first ring grooves (12) around the axes of the first spline shafts (4);
- front and rear sides of the top surface of the first box body (8) are fixedly connected with vertical plates (14), first sliding chutes (15) are formed in opposite sides of two vertical plates (14), a length direction of the first sliding chutes (15) is vertical to ground, a second box body (16) is slidably located in the first sliding chutes (15) and located above the first box body (8), a bottom surface of the second box body (16) is open, third openings (17) are formed in left and right side walls of the second box body (16), bearings are fixedly connected at the third openings (17), a plurality of second rubber rollers (18) are rotatably installed between two bearings, the second spline shafts (7) pass respectively through the third openings (17) to stretch into the second box body (16), the second rubber rollers (18) respectively slidably sleeve the second spline shafts (7), second spline grooves (19) matched with the second spline shafts (7) are formed in the second rubber rollers (18), second ring grooves (20) are formed in circumferential outer walls of the second rubber rollers (18), and a plurality of second anti-skid stripes (21) are uniformly and fixedly connected into the second ring grooves (20) around the axes of the second spline shafts (7);
- a first avoidance groove (22) is formed in a front side wall of each of the strand threading boxes (3), a second avoidance groove (23) is formed in a rear side wall of each of the strand threading boxes (3), a feeding pipe (24) is fixedly connected to a rear side wall of the first box body (8), an end of the feeding pipe (24) is communicated into the first box body (8), an other end of the feeding pipe (24) extends out of the second avoidance groove (23), and is provided with the bundling unit, a discharging pipe (25) is fixedly connected to a front side wall of the first box body (8), an end of the discharging pipe (25) is communicated into the first box body (8), an other end of the discharging pipe (25) extends towards the first avoidance groove (22), and is provided with the lubricating unit.