Please select the most similar patent number from A, B, C and D. Which number is?
An improved pulp washer or shredder, comprising a rotating swivel roller (4) and a squeezing central roller (7). A supporting net (8) covers the swivel roller (4) and the squeezing central roller (7); a material distribution device (9) for distributing materials to the supporting net (8) is disposed between the swivel roller (4) and the squeezing central roller (7); an unloading device is disposed at the inner side of the squeezing central roller (7); at least one squeezing sub-roller (10) which abuts against the squeezing central roller (7) is disposed on the squeezing central roller (7); and all of the squeezing sub-rollers (10) are in contact with the supporting net (8).
A: A pneumatic vacuum pressing apparatus, comprising a pressing cylinder (9), a juice receiving part (17), a piston (10), a filter (12), a frame (1), and an electric gas supply module. The piston (10) is slidably mounted in the pressing cylinder (9). The outer edge of the piston (10) tightly fits the inner edge of the pressing cylinder (9). The piston (10) divides the interior of the pressing cylinder (9) into a positive pressure air cavity (8) and a pressing cavity (30). The pressing cavity (30) is in communication with the juice receiving part (17) to constitute a sealed cavity (31) that is through within. The filter (12) is provided within the pressing cavity (30), within the juice receiving part (17), or between the pressing cavity (30) and the juice receiving part (17). Kept in a vacuum environment are food such as fruits or vegetables whilst being pressed and the juice (comprising oil) when entering the juice receiving part or a juice receiving can, thus preventing the problem in the prior art of discoloration and deterioration of the juice due to oxidation.
B: A device for washing a paper pulp, comprising a roller extrusion mechanism (100) and a pulp transport mechanism (200). The roller extrusion mechanism (100) comprises a master roller (101) and a plurality of sub-rollers (102), the sub-rollers (102) being provided along the circumferential direction of the master roller (101) around the central axis of the master roller (101), and the sub-rollers (102) abutting against the master roller (101) in a radial direction and forming corresponding nips (103). The pulp transport mechanism (200) comprises a pulp transport mesh assembly (201), the pulp transport mesh assembly (201) being loaded with paper pulp and transporting same between the master roller (101) and each of the sub-rollers (102), and the paper slurry being washed in the nips (103). Less sub-rollers (102) are used for obtaining the same nips (103), and the nips (103) are distributed in a vertical direction, making the overall structure more compact.
C: An electric-powered vacuum pressing machine, comprising a pressing cylinder (9), a juice receiving part, a piston (10), an electric-powered telescoping mechanism, an electric vacuuming pump (17), and a machine body (7). The sliding piston (10) is mounted in the pressing cylinder (9). The outer edge of the piston (10) tightly fits the inner edge of the pressing cylinder (9). The piston (10) divides the pressing cylinder (9) into a travel cavity (2) and a pressing cavity (13) separated from each other. The top surface of the piston (10) is arranged within the travel cavity (2). The bottom surface of the piston (10) is arranged within the pressing cavity (13). Kept in a vacuumed environment are food such as fruits or vegetables whilst being pressed and the juice (comprising oil) when entering the juice receiving part or a juice receiving tanks, thus preventing the problem in the prior art of discoloration and deterioration of the juice due to oxygenation. Compared with a vacuum spiral juice pressing machine, cleaning is easy (each time after use, washing is required for only three components, namely the juice receiving part, the pressing cylinder (9), and the piston (10), while the vacuum spiral juice pressing machine requires the washing of seven components, namely a sealing cover, a feeder cylinder, a spiral shaft, a cylindrical filter, a juicing cavity, a juice receiving cup, and a pulp cup) and operation is easy (only the three components need to be mounted at minimum, while the vacuum spiral juice pressing machine requires at least the 7 components to be mounted).
D: A satellite rotary screen transfer printing device, comprising: a center roller (1) and at least one rotary screen transfer printing assembly (100) distributed around the circumference of the center roller. The center roller is mounted on a frame (2) in such a manner that the center roller can rotate about the central axis of the center roller. A fabric (3) available for printing enters the space between the center roll and each rotary screen transfer printing assembly for printing. Each rotary screen transfer printing assembly comprises a rotary screen plate roller (102) prefabricated with a pattern and a transfer roller (103) used for transferring the pattern on the rotary screen plate roller to the fabric. The transfer roller is between the rotary screen plate roller and the center roller. The rotary screen transfer printing assembly further comprises a scraper assembly (104). The scraper assembly comprises a scraper built in the rotary screen plate roller. The position and pressure of the scraper relative to the inner surface of the rotary screen plate roller are adjusted by means of a scraper adjustment mechanism.
Answer: B