Novel pipe end sealing structure

Abstract

The invention provides a novel pipe end sealing structure which comprises a high-pressure oil pipe, wherein a connector is arranged at the front end of the high-pressure oil pipe; the rear part of the high-pressure oil pipe is a straight-line segment; the connector comprises a pier head and a pier tail; the pier tail and the straight-line segment of the high-pressure oil pipe form a step; a pressure pipe sleeves the straight-line segment; the straight-line length of the pressure pipe is less than 15 mm; the diameter of the pier head is 6 plus or minus 0.5 mm; the diameter of the pier tail is 11.5 plus or minus 0.5 mm; the taper of the pier head as well as of the pier tail is 57 plus or minus 0.2 degrees; the pier head is provided with an arc of R1 mm; the pressure pipe is a stepped pressure pipe; the radian of the inner surface of a step of the pressure pipe is matched with that of the outer surface of the step of the pier tail; the taper of the outer surface of the step of the pressure pipe is 135 degrees; the step of the pier tail extends 2 mm; and the step length from the pier head to the pier tail is 7 plus or minus 0.5 mm. Through matching of the pier head, the pier tail and the tapers, the straight-line length of the novel pipe end sealing structure is less than 15 mm, which avoids the difficult problem of conflict between the facts that the straight-line segment of a high-pressure oil pipe cannot be designed longer and a pipe end sealing structure requires a long straight-line segment.

Description

technical field [0001] The invention relates to the field of auto parts and is used for high-pressure oil pipes of diesel engines, in particular to a novel pipe end sealing structure. Background technique [0002] The extended length of the engine common rail high-pressure oil pipe is getting shorter and shorter, resulting in shorter and shorter straight sections that can be used for bending. The original pipe end sealing structure requires that the straight sections at both ends of the high-pressure oil pipe be > 30mm, while the newly developed common rail high-pressure oil pipe Unable to meet this request. Contents of the invention [0003] The invention provides a novel pipe end sealing structure, which is used to reduce the requirement on the length of the straight sections at both ends of the high-pressure oil pipe. [0004] For this reason, the technical solution of the present invention is that a novel pipe end sealing structure includes a high-pressure oil pipe...

AI Technical Summary

Problems solved by technology

[0002] The extended length of the engine common rail high-pressure oil pipe is getting shorter and shorter, resulting in shorter and shorter straight sections that can be used for bending. The original pipe end sealing structure requires that the straight sections at both ends of the high-pressure oil pipe be > 30mm, while the newly developed common rail high-pressure oil pipe cannot meet this requirement

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