Please select the most similar patent number from A, B, C and D. Which number is?
An oiling device, used for oiling the outer wall of an inflated sausage casing pipe, and comprising a plurality of circular oiling rollers (1), an oiling material layer, and a roller retaining device. The circular oiling roller (1) is in the shape of a waist drum which is thin in the middle and thick at both ends, and is capable of freely rotating around a center rotation axis; each circular oiling roller (1) is provided with a hollow oil injection hole on the center rotation axis; one end of the oil injection hole is closed, and the other end of the oil injection hole is communicated with an oil inlet pipe (4) by means of a rotary connector (3); a plurality of micropores (5) communicated with the oil injection hole are uniformly and peripherally distributed on the outer wall of each circular oiling roller (1). The oiling material layer is made of an oil adsorbing and spreading material and is wrapped around the outer wall of the circular oiling roller (1). The roller retaining device is designed to be suitable for pressing the circular oiling rollers (1) against the outer wall of the inflated sausage casing pipe. The quantity and outer wall profiles of the circular oiling rollers (1) are designed to enable the sausage casing pipe to correspond to at least one circular oiling roller (1) at any arc on the periphery of the cross section of the outer wall.
A: A grinding mill internal spiral roller; a central hole (3) is provided in the axial center of a roll shaft, a spiral groove (4) is disposed on the outer ring of the roll shaft, and a rotating joint (5) is disposed on one end of the roll shaft; a distributive pipe (6) is disposed on the side proximal to the rotating joint (5) in the central hole of the roll shaft, the gap between the outer wall of the distributive pipe and the inner wall of the central hole being a water returning channel (7); one end of the distributive pipe is communicated with a water inlet (8) of the rotating joint (5), and a sealing structure (10) is disposed between the outer wall of the other end of the distributive pipe (6) and the inner wall of the central hole; a water outlet (11) is disposed on the central hole (3)and is communicated with one end of the spiral groove (4), and the other end of the spiral groove (4) is communicated with the water returning channel (7) through a water returning hole (13), and the tail end of the water returning channel (7) is communicated with a water returning outlet (12) of the rotating joint (5). The grinding mill internal spiral roller is reasonable in structure and has good working performance.
B: Disclosed is a self-service power car-washing device, comprising a garage body (1), a power system and a spraying system. The power system comprises a roller assembly (2), a transmission shaft (3) and a locking mechanism (4); the roller assembly (2) is rotationally connected to the bottom of one end of the garage body (1), the transmission shaft (3) is rotationally connected to the garage body (1), the roller assembly (2) is in driving connection with the transmission shaft (3), and the locking mechanism (4) is arranged at the two ends of the roller assembly (2) to lock the roller assembly (2); and the spraying system comprises a water tank (5), a water pump (6), a water conveying pipe assembly (7), a spraying pipe (8) and a reciprocating mechanism (9), wherein the water tank (5) is arranged on the garage body (1), the water pump (6) is connected to the water tank (5), the transmission shaft (3) is in driving connection with the water pump (6); one end of the water conveying pipe assembly (7) is connected to the water pump (6), the other end of the water conveying pipe assembly is connected to the spraying pipe (8), and several nozzles (801) are arranged on the spraying pipe (8); the reciprocating mechanism (9) is arranged at the top of the garage body (1), and the transmission shaft (3) is in driving connection with the reciprocating mechanism (9); the spraying pipe (8) is slidably connected to an inner wall of the garage body (1), and the reciprocating mechanism (9) drives the spraying pipe (8) to reciprocate at the front end and the rear end of the garage body (1). The device is powered by automobile driving wheels, and an extra electric power device does not need to be equipped, such that electric energy is saved to a great extent, and unnecessary waste is avoided.
C: A pellet machine roller (5), a pellet machine (17), a biomass pellet processing device, and a processing method. The biomass pellet processing device comprises a first conveyor, a slicing crusher, a second conveyor, a drying device, a third conveyor, the pellet machine (17), a cooling device, and a packing line. The pellet machine roller (5) comprises a roller body (1) and gear rings (2); a plurality of rows of gear rings (2) are arranged on the outer wall of the roller body (1) in the circumferential direction, and a groove (3) is formed between any two adjacent rows of gear rings (2); a plurality of through holes (31) are formed in each groove (3) in the circumferential direction, and one end, facing the outer side of the roller body (1), of the plurality of through holes (31) is a waist-shaped long hole (32).
D: A sausage casing packaging barrel, comprising a barrel body (1). A top end surface of the barrel body (1) is fixedly connected to a side plate (2), a surface of the side plate (2) is provided with a groove, a first rotation shaft (3) is rotatably connected to an inner wall of the groove of the side plate (2), a surface of the first rotation shaft (3) is fixedly connected to a barrel cover (4), the bottom end of the barrel cover (4) is fixedly connected to a long rod (5), the bottom end of the long rod (5) is fixedly connected to a baffle plate (6), an outer wall of one side of the barrel body (1) is provided with a connection bar (7), one end of the connection bar (7) is fixedly connected to a outer wall of the barrel body (1), the other end of the connection bar (7) is fixedly connected to a scale (8), and an inner wall of the bottom end of the barrel body (1) is provided with a first spring (9). When a casing is placed, the casing can be inserted into a sleeve rod (12), the casing touches a swivel plate (15), and under the action of thrust and of a second rotation shaft (14), the swivel plate (15) rotates to drive a second spring (16) and a sponge sleeve (17) to rotate, the sponge sleeve (17) abuts against the casing, and the casing is fixed under the action of the elastic force of the second spring (16) to achieve the effect of fixation.
Answer: D