Please select the most similar patent number from A, B, C and D. Which number is?
A warping device of a double-layer type, comprising a rack (1) which is horizontally provided at the middle portion of the rack with a partition plate (11), a passage (12) being provided at one side of the partition plate (11), the partition plate (11) separating the rack (1) into an upper layer and a lower layer, the upper layer being provided with a yarn unwinding component (2), a first rotary roller (24) and a yarn collecting beam (3), a tensioning component (4), which is provided between the passages (12), being provided at one side of the yarn collecting beam (3); the lower layer being provided with a first yarn separating frame (13), a second yarn separating frame (14), a yarn guiding component (5), a third yarn separating frame (15) and a warping component (6). The yarn unwinding component can move into or move out of the rack under the effect of a chute, facilitating a worker to change a yarn package to be processed, improving work efficiency.
A: Disclosed is a dust removal device for yarn dyeing and finishing, the device comprising a frame. A dust removal device is arranged inside the frame; a yarn inlet is arranged on one side of the frame, and a yarn outlet is arranged on the other side of the frame; a first yarn guide device is arranged on the side in the frame close to the yarn inlet, a first yarn guide roller is sleeved on the outer side of the first yarn guide device, and a first yarn-pressing rotating wheel is installed above the first yarn guide roller; and a second yarn guide device is arranged on the side in the frame close to the yarn outlet. Yarn is brought into the dust removal device by means of the first yarn guide device; a driving electric motor is started, and a yarn rolling wheel rotates to rub the yarn, such that dust on the yarn is beaten out of same and collected in a dust collection box; the yarn is blown up by means of an air blower, and the dust is collected in a dust collection plate; and the treated yarn is then taken out by means of the second yarn guide device, thereby achieving automated dust removal treatment of the yarn, improving the quality of the yarn, and reducing manual operation.
B: A continuous UD non-woven cloth production line comprises: a yarn frame (1) disposed at a forefront, a fiber dividing frame (2) disposed at a rear end of the yarn frame (1), and a frame (3) disposed at a rear end of the fiber dividing frame (2). A front end of the frame (3) is provided with a first tensioner (4) and a second tensioner (5). A reed (6) is disposed between the first tensioner (4) and the second tensioner (5) and on the frame (3). A front traction apparatus (7) is disposed at a rear end of the second tensioner (5) and on the frame (3). A fiber placement roller apparatus (8) is disposed at a rear end of the front traction apparatus (7) and on the frame (3). A gluing roller apparatus (9) is disposed at a rear end of the fiber placement roller apparatus (8) and on the frame (3). A coating placement roller mounting frame (10) and a composite material guiding roller (11) are disposed at a rear end of the gluing roller apparatus (9) and on the frame (3). A coating placement roller (12) is disposed at an upper end of the coating placement roller mounting frame (10).
C: A novel sand making machine, comprising a machine frame (4). The machine frame comprises an upper machine frame (42) and a lower machine frame (41). The upper machine frame is provided with an upper screen tray device (6). The left and right sides of the upper machine frame are both provided with a first roller assembly (1). The bottom of the upper screen tray device is provided with several water distributors (5). The lower machine frame is provided with a lower screen tray device (7). The left and right sides of the lower machine frame are both provided with a second roller assembly (3). The sand making machine has a simple structure, a reasonable design, a small floor area, and a low manufacturing cost.
D: A flat yarn warping machine comprises a stander (110) having a compression roller adjusting mechanism for adjusting both the position and the pressure of a compression roller (10), the flat yarn warping machine further comprises a group of edge yarn devices (24) arranged on the stander (110), and the edge yarn devices (24) are positioned above a warp beam flange (25) and above the end part of the compression roller (10). The edge yarn devices (24) comprise a mounting shaft (2441) fixed on the stander (110). An edge thread roller (2448) is provided on the mounting shaft (2441) positioned at one side of the stander (110). A roller mounting plate (2447) is provided on the mounting shaft (2441) positioned at one side of the edge thread roller (2448). A sliding shaft (2446) is provided on the roller mounting plate (2447). The other end of the sliding shaft (2446) is fixedly provided with a baffle plate (2443). A threaded shaft (2444) is arranged between the baffle plate (2443) and the roller mounting plate (2447). A sliding seat (2445) for guiding a flat yarn is arranged on the threaded shaft (2444), and the slide seat (2445) is also sleeved on the slide shaft (2446). An adjusting hand wheel (2442) is provided on the end part of the threaded shaft (2444). The flat yarn warping machine can keep the flat yarn from falling into the gap between the end part of the compression roller (10) and the warp beam flange (25), and thereby solving the problem of less uniformity of the warp beam flange surface.
Answer: D