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Oil pipe joint

A technology for oil pipe joints and fixed pipes, which is applied in the field of pipe joints, can solve the problems of high processing precision of parts, difficulty in meeting the requirements of processing equipment, and unsuitability for rapid production, etc., and achieve low processing difficulty, simple structure, and low processing cost. low effect

Inactive Publication Date: 2009-10-28
LIYANG SHENGJIE MACHINE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are two common structures: one is to directly process the high-pressure oil pipe joint on the forging blank, which has better sealing performance, but it is not suitable for rapid production; the other is to adopt a high-power laser welding structure between the joint and the rail pipe. Special welding equipment is required for processing, and the processing accuracy of parts is very high. It is difficult for ordinary processing equipment to meet the requirements, and leakage is easy to occur

Method used

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  • Oil pipe joint

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Embodiment Construction

[0012] The present invention will be further described below in conjunction with accompanying drawing.

[0013] Such as figure 1 In the shown embodiment, the tapered sealing surfaces 3 and 2 are processed at the central part of the bottom surface of the joint 4 and the corresponding part where the rail pipe 1 and the joint 4 are connected; then the fixing sleeve 6 is set on the rail pipe 1, and then, Put the sealing ball 5 with a through hole on the tapered sealing surface 2 of the rail pipe 1, and then tighten the thread provided on the lower part of the joint 4 and the thread provided on the fixed sleeve 6, and seal the ball 5 before tightening. The through hole of the joint is connected with the through hole of the rail pipe at the lower end.

[0014] The oil pipe joint installed on the common rail pipe is used to install the high-pressure oil pipe. The common rail pipe is connected with the high-pressure pump and the fuel injector through the high-pressure oil pipe to rea...

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Abstract

The invention discloses an oil pipe joint belonging to the technical field of diesel engine parts, namely a developed new-structure product aiming at the structure defects existing in the similar products. The oil pipe joint comprises a rail pipe, a joint, a fixed sleeve and a sealing ball, wherein the corresponding parts of the joint bottom and the rail pipe which are connected are respectively provided with conical sealing surfaces; a sealing ball with through holes is arranged between the two conical sealing surfaces, and the fixed sleeve sleeved on the rail pipe is provided with a thread which is matched with a thread arranged at the lower end of the joint. The invention has the advantages of scientific and reasonable design, simple structure, convenient maintenance, low processing difficulty of the sealing surface and the sealing ball, good sealing performance, no need of special equipment and low processing cost.

Description

technical field [0001] The invention relates to a pipe joint on a common rail pipe of a diesel engine. Background technique [0002] The high-pressure common rail system is a new type of electronically controlled fuel injection system for diesel engines, including high-pressure pumps, common rail pipes, fuel injectors and electronic control units. The common rail pipe stores and distributes high-pressure diesel oil. Since the 160MPa high-pressure diesel oil is filled in it, the sealing requirements of the high-pressure oil pipe joints on the common rail pipe are very high. [0003] At present, there are two common structures: one is to directly process the high-pressure oil pipe joint on the forging blank, which has better sealing performance, but it is not suitable for rapid production; the other is to adopt a high-power laser welding structure between the joint and the rail pipe. Special welding equipment is required for processing, and the processing accuracy of parts is...

Claims

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Application Information

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IPC IPC(8): F16L41/02F16L41/08F02M55/02
Inventor 涂国祥
Owner LIYANG SHENGJIE MACHINE
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