Sealing block end face sealing device for use in filter rod pneumatic conveyer

Abstract

The invention discloses a sealing block end face sealing device for use in a filter rod pneumatic conveyer, which comprises an emitting drum, a front positioning wheel and a rear positioning wheel, wherein a flange is arranged on the left end of the rear positioning wheel; the left end face of the flange is jointed with a rear support; an arc block is arranged below the flange; and the left end face of the arc block is closely jointed with the right end face of a raised edge part on the lower semicircle of the flange. An actuator is arranged on a small support on the lower part of a front support on the right end of the sealing block; and when the horizontal ejecting rod of the actuator extends out from the left end, the effective operating stroke of the horizontal ejecting rod ensures that the clearance between the left end face of the sealing block and the right end face of the arc block is eliminated completely. The device has the advantages that: 1, the use of the arc block and the flange instead of a sealing ring reduces manufacturing difficulty and improves the assembly manufacturability of the emission drum part; 2, after being worn, the arc block can be replaced conveniently; and 3, the driving mode of the sealing block is changed into a 'push' mode from a 'pull' mode, so the mechanism is simplified to a maximum degree and the work loads for assembly and debugging are reduced.

Description

technical field [0001] The invention relates to a tobacco machine, that is, a filter rod pneumatic conveyer in the tobacco machine. The machine uses compressed air as power to transport the filter rod for cigarettes to the filter rod receiving station of the cigarette group through a sealed pipeline. The sealing block in the present invention refers to an indispensable important part in the filter rod pneumatic conveyor. Background technique [0002] Pneumatic Filter Rod Conveyor is a special equipment for long-distance transport of filter rods for cigarettes from the filter rod storage to the downstream cigarette making unit. Ensuring a reliable seal between the end face of the sealing block and the rear positioning wheel is one of the necessary conditions for the normal operation of the filter rod pneumatic conveyor. [0003] Before the present invention, similar equipment on the market is that a sealing ring 1 is housed at the outlet of the filter tip of the outer circle...

AI Technical Summary

Problems solved by technology

[0005] 1. The sealing ring 1 and the rear positioning wheel 2 adopt an interference connection. After the connection is completed, the common left end plane of the sealing ring 1 and the rear positioning wheel 2 is processed. However, due to structural limitations, the sealing ring 1 can only be made into a thin-walled part. Problems such as the sealing ring 1 being pulled off or easily loosening from the rear positioning wheel 2 during the surplus connection are easy to occur, resulting in difficult manufacturing process and high cost;

[0006] 2. The sealing ring 1 protrudes from the outer cylindrical surface of the rear positioning wheel 2 in the entire circumferential direction, causing inconvenient assembly of the launching drum components including the rear positioning wheel 2;

[0007] 3. The seal ring 1 has wear and tear caused by the impact of the seal block during use, but the seal ring 1 and the rear positioning wheel 2 become one piece after assembly, and the seal ring 1 cannot be replaced separately;

[0008] 4. The mechanism for driving the sealing block 9 to move in the horizontal direction has many parts, the structure is complicated, and the assembly and debugging are troublesome;

[0009] 5. The envelope formed when the groove block 16 at one end of the sealing block 9 moves up and down will occupy a space channel. When the filter rod pneumatic conveyor removes defective filter rods, some defective filter rods and debris enter the sealing block bottom plate 10 The gap between the base plate 12 and the bottom plate 12 of the sealing block prevents the bottom plate 10 from descending to the standby position

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