CN103967667A - High-pressure fuel pipe turning-connection piece - Google Patents
High-pressure fuel pipe turning-connection piece Download PDFInfo
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- CN103967667A CN103967667A CN201410163741.1A CN201410163741A CN103967667A CN 103967667 A CN103967667 A CN 103967667A CN 201410163741 A CN201410163741 A CN 201410163741A CN 103967667 A CN103967667 A CN 103967667A
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- pipe
- tube
- sealing surface
- connecting tube
- tunnel tube
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Abstract
The invention discloses a high-pressure fuel pipe turning-connection piece which comprises a passageway pipe (1), a connecting pipe (2) and a blocking pipe (3). Front external threads (5) of the passageway pipe (1) are connected with internal threads with the upstream portion connected to a high-pressure oil pipe part. Middle external threads (13) of the connecting pipe (2) are connected with internal threads with the downstream portion connected with the high-pressure oil pipe part. A pipe body (8) of the passageway pipe (1) is sleeved with the connecting pipe (2). Middle internal threads (15) of the blocking pipe (3) are matched with rear external threads (9) of the passageway pipe (1) so that the blocking pipe (3) can be installed on the passageway pipe (1). An inner inclined shoulder (12) of the connecting pipe (2) makes contact with an outer inclined shoulder (14) of the blocking pipe (3). By means of the high-pressure fuel pipe turning-connection piece, high-pressure fuel with the pressure of 200 MPa can be reliably sealed, a high-pressure sealing face can be easily protected in the detaching and assembling process, and the high-pressure fuel pipe turning-connection piece can adapt to turning connection of different internal-thread interface parts by changing the specification of the external threads of the connecting pipe 2.
Description
Technical field
The invention belongs to dynamic power machine technical field, be specifically related to a kind of injection line adaptor.
Background technique
The fuel injection system of internal-combustion engine is made up of high pressure oil pump, high-pressure oil pipe and oil sprayer, is the chief component of internal-combustion engine, and the working condition of its system directly affects the service behaviour of internal-combustion engine.The engine shutdown fault proportion maximum that fuel injection system causes, high-pressure oil pipe is a strength member of oil-fired system, it connects high pressure oil pump and oil sprayer, more than on inline pump, the maximum functional oil pressure of high-pressure oil pipe can reach 120MPa, the working pressure of high-pressure common-rail fuel system is even more than 200MPa, if it is unreliable that high-pressure oil pipe connects conical surface seal, produce and leak, directly affect the performance of diesel engine, make internal-combustion engine can not give full play to its usefulness, more seriously, once the diesel oil leaking flows to the position that vent systems equitemperature is higher, very likely cause that engine room catches fire, seriously arrange and can cause car load to scrap and even casualties.The reason that generally makes high-pressure oil pipe joint conical surface seal decline is that the conical surface exists minute shape error.And the vibration of fuel injection system is also the one of the main reasons that causes oil-fired system oil leakage fault.The vibration of oil-fired system can cause oil pipe tightening nut the lax and conical surface fretting wear and destroy the sealing of joint.
The adaptor of pressure duct adopts integral type conical surface sealing structure conventionally, and sealing cone and adaptor be rotation simultaneously in installation process, can cause destruction in various degree to sealing surface, reduces the reliability of high pressure sealing place.
The application number of Robert Bosch Co., Ltd is 201180031029.9, the patent of invention that name is called " pressure connection " discloses a kind of pressure connection at least one pressure duct of common-rail injection system is connected with the entry port of fuel injector, can with enter pressure tube that hole is connected and have for being that the shell of interface of a pressure duct interconnects in the situation that formation is slidably matched.
For solving fast and effectively the connectivity problem of different high pressure fuel pipelines and internal thread interface part, need to design a kind of injection line adaptor that can effectively protect sealing surface, ensure the reliable sealing of high-pressure fuel oil connecting pipe road jointing.
Summary of the invention
What the present invention is directed to is that high pressure fuel pipeline is poorly sealed, leak seriously, have the technical problem of environmental protection and potential safety hazard, and a kind of injection line adaptor proposing, ensure the reliable sealing of injection line and internal thread interface part, can adapt to the internal thread of different size simultaneously.
Technological scheme of the present invention: a kind of injection line adaptor, comprise tunnel tube 1, connecting tube 2, gear pipe 3, tunnel tube 1 comprises front sealing surface 4, front outside thread 5, body 8, rear outside thread 9 and rear sealing surface 10, connecting tube 2 comprises interior oblique shoulder 12 and middle outside thread 13, and gear pipe 3 comprises outer oblique shoulder 14 and middle internal thread 15; The internal thread that front outside thread 5 and the upstream of tunnel tube 1 is connected high-pressure oil pipe component is connected, and the internal thread that middle outside thread 13 and the downstream of connecting tube 2 is connected high-pressure oil pipe component is connected; The sealing cone that the front sealing surface 4 of tunnel tube 1 and rear sealing surface 10 are connected high-pressure oil pipe component with upstream and downstream respectively contacts, and it is characterized in that: connecting tube 2 is enclosed within on the body 8 of tunnel tube 1; The middle internal thread 15 of gear pipe 3 coordinates with the rear outside thread 9 of tunnel tube 1 manages 3 by gear and is arranged in tunnel tube 1; The interior oblique shoulder 12 of connecting tube 2 contacts with the outer oblique shoulder 14 of gear pipe 3.
The present invention compared with the existing technology has following beneficial effect: the high pressure fuel that it is 200MPa that the present invention can realize pressure carries out reliable sealing; be conducive to the protection of disassembly process to high pressure sealing face, and can adapt to by changing the outside thread specification of connecting tube 2 switching of different internal thread interface parts.
Brief description of the drawings
Fig. 1 is composite structure schematic diagram of the present invention;
Fig. 2 is the structural representation of tunnel tube of the present invention;
Fig. 3 is the structural representation of connecting tube of the present invention;
Fig. 4 is the structural representation of gear pipe of the present invention.
Tunnel tube 1, connecting tube 2, gear pipe 3, front sealing surface 4, front outside thread 5, main tighten position 6, internal oil passages 7, body 8, rear outside thread 9, rear sealing surface 10, from tighten position 11, interior oblique shoulder 12,
Middle outside thread 13, outer oblique shoulder 14, middle internal thread 15, yi word pattern notch structure 16
Embodiment
A kind of injection line adaptor, comprises tunnel tube 1, connecting tube 2, gear pipe 3, tunnel tube 1 comprises front sealing surface 4, front outside thread 5, body 8, rear outside thread 9 and rear sealing surface 10, and connecting tube 2 comprises interior oblique shoulder 12 and middle outside thread 13, and gear pipe 3 comprises outer oblique shoulder 14 and middle internal thread 15; The internal thread that front outside thread 5 and the upstream of tunnel tube 1 is connected high-pressure oil pipe component is connected, and the internal thread that middle outside thread 13 and the downstream of connecting tube 2 is connected high-pressure oil pipe component is connected; The sealing cone that the front sealing surface 4 of tunnel tube 1 and rear sealing surface 10 are connected high-pressure oil pipe component with upstream and downstream respectively contacts, and it is characterized in that: connecting tube 2 is enclosed within on the body 8 of tunnel tube 1; The middle internal thread 15 of gear pipe 3 coordinates with the rear outside thread 9 of tunnel tube 1 manages 3 by gear and is arranged in tunnel tube 1; The interior oblique shoulder 12 of connecting tube 2 contacts with the outer oblique shoulder 14 of gear pipe 3.
Preferably the rear outside thread 9 in tunnel tube 1 is identical with nominal diameter and the rotation direction of the middle internal thread 15 on gear pipe 3, contrary with middle outside thread 13 rotation directions on connecting tube 2.After being installed to high-pressure oil passage, get loose direction and the connecting tube 2 and the outside opposite direction that gets loose of internal thread interface part accordingly of tunnel tube 1 and connecting tube 2, three can condition each other, and is difficult for becoming flexible, and sealing effect is better.
Preferably tunnel tube 1 also comprises internal oil passages 7, and the internal diameter that the diameter of described internal oil passages 7 is connected high-pressure oil pipe than upstream and downstream is identical or bigger.
Preferably front sealing surface 4 and the rear sealing surface 10 of tunnel tube 1 are cone structure, and the angle of front sealing surface 4 is connected large 1 degree of sealing cone angle of high-pressure oil pipe component than upstream, and rear sealing surface 10 is connected little 1 degree of sealing cone angle of high-pressure oil pipe component than downstream.
Preferably the interior oblique shoulder 12 of connecting tube 2 is with identical with the angle of keeping off the outer oblique shoulder 14 of managing 3.
Preferably the bilateral of gear pipe 3, with yi word pattern notch structure 16, can play the effect being easy for installation and removal.
Described tunnel tube 1 is tightened position 6 with the master of outer hexagonal structure; Described connecting tube 2 with outer hexagonal structure from tightening position 11, can play the effect being easy for installation and removal.
Mounting type of the present invention is: being inserted on the body 8 tunnel tube 1 and leaning against main tightening on position 6 from tightening position 11 ends connecting tube 2, gear pipe 3 any sides are arranged on the rear outside thread 9 of tunnel tube 1, a reverse cycle 1-2 pitch after screw-in maximum position, make the rear sealing surface 10 of tunnel tube 1 reserve sufficient length, adjust the position of connecting tube 2 on tunnel tube 1 body, after ensureing that the interior oblique shoulder 12 of connecting tube 2 and the outer oblique shoulder 14 of gear pipe 3 contact, connecting tube 2 can rotate freely on the body 8 in tunnel tube 1, ensure that the sealing cone that tunnel tube 1 reserves in tightening connecting tube 2 rear sealing surface 10 is effectively connected high-pressure oil pipe component with downstream contacts.
Claims (7)
1. an injection line adaptor, comprise tunnel tube (1), connecting tube (2), gear pipe (3), tunnel tube (1) comprises front sealing surface (4), front outside thread (5), body (8), rear outside thread (9) and rear sealing surface (10), connecting tube (2) comprises interior oblique shoulder (12) and middle outside thread (13), and gear pipe (3) comprises outer oblique shoulder (14) and middle internal thread (15); The front outside thread (5) of tunnel tube (1) is connected with the internal thread that upstream is connected high-pressure oil pipe component, and the middle outside thread (13) of connecting tube (2) is connected with the internal thread that downstream is connected high-pressure oil pipe component; The sealing cone that the front sealing surface (4) of tunnel tube (1) and rear sealing surface (10) are connected high-pressure oil pipe component with upstream and downstream respectively contacts, and it is characterized in that: connecting tube (2) is enclosed within on the body (8) of tunnel tube (1); The gear pipe middle internal thread (15) of (3) and the rear outside thread (9) of tunnel tube (1) coordinate and will keep off pipe (3) and be arranged in tunnel tube (1); The interior oblique shoulder (12) of connecting tube (2) contacts with the outer oblique shoulder (14) of gear pipe (3).
2. injection line adaptor according to claim 1, it is characterized in that: the rear outside thread (9) in tunnel tube (1) is identical with nominal diameter and the rotation direction of the middle internal thread (15) on gear pipe (3), contrary with middle outside thread (13) rotation direction on connecting tube (2).
3. injection line adaptor according to claim 1, it is characterized in that: described tunnel tube (1) also comprises internal oil passages (7), the internal diameter that the diameter of described internal oil passages (7) is connected high-pressure oil pipe than upstream and downstream is identical or bigger.
4. injection line adaptor according to claim 1, it is characterized in that: the front sealing surface (4) of tunnel tube (1) and rear sealing surface (10) are cone structure, the angle of front sealing surface (4) is connected large 1 degree of sealing cone angle of high-pressure oil pipe component than upstream, rear sealing surface (10) is connected little 1 degree of sealing cone angle of high-pressure oil pipe component than downstream.
5. injection line adaptor according to claim 1, is characterized in that: the interior oblique shoulder (12) of connecting tube (2) is identical with the angle of the outer oblique shoulder (14) of gear pipe (3).
6. injection line adaptor according to claim 1, is characterized in that: the bilateral of described gear pipe (3) is with yi word pattern notch structure (16).
7. injection line adaptor according to claim 1, is characterized in that: described tunnel tube (1) is tightened position (6) with the master of outer hexagonal structure; Described connecting tube (2) with outer hexagonal structure from tightening position (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410163741.1A CN103967667A (en) | 2014-04-16 | 2014-04-16 | High-pressure fuel pipe turning-connection piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410163741.1A CN103967667A (en) | 2014-04-16 | 2014-04-16 | High-pressure fuel pipe turning-connection piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103967667A true CN103967667A (en) | 2014-08-06 |
Family
ID=51237580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410163741.1A Pending CN103967667A (en) | 2014-04-16 | 2014-04-16 | High-pressure fuel pipe turning-connection piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103967667A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105756833B (en) * | 2016-03-24 | 2018-08-21 | 中国北方发动机研究所(天津) | A kind of switching device between high-pressure oil pipe and fuel injector |
| CN108843880A (en) * | 2018-09-14 | 2018-11-20 | 成都格瑞特高压容器有限责任公司 | High pressure sealing joint |
| CN110657131A (en) * | 2019-10-03 | 2020-01-07 | 江苏军宏机械有限公司 | Oil outlet mechanism of booster oil cylinder |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2445902A1 (en) * | 1974-09-26 | 1976-04-08 | Nova Werke Ag | PIPE CONNECTION |
| CN1087062C (en) * | 1997-11-11 | 2002-07-03 | 日野自动车工业株式会社 | Pipe adaptor |
| CN102667133A (en) * | 2009-11-23 | 2012-09-12 | 罗伯特·博世有限公司 | Pressure pipe fitting for a common-rail injection system |
| EP2286082B1 (en) * | 2008-06-05 | 2013-07-03 | Wärtsilä Finland Oy | A high pressure fuel connection arrangement to an injector holder in a common rail system |
-
2014
- 2014-04-16 CN CN201410163741.1A patent/CN103967667A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2445902A1 (en) * | 1974-09-26 | 1976-04-08 | Nova Werke Ag | PIPE CONNECTION |
| CN1087062C (en) * | 1997-11-11 | 2002-07-03 | 日野自动车工业株式会社 | Pipe adaptor |
| EP2286082B1 (en) * | 2008-06-05 | 2013-07-03 | Wärtsilä Finland Oy | A high pressure fuel connection arrangement to an injector holder in a common rail system |
| CN102667133A (en) * | 2009-11-23 | 2012-09-12 | 罗伯特·博世有限公司 | Pressure pipe fitting for a common-rail injection system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105756833B (en) * | 2016-03-24 | 2018-08-21 | 中国北方发动机研究所(天津) | A kind of switching device between high-pressure oil pipe and fuel injector |
| CN108843880A (en) * | 2018-09-14 | 2018-11-20 | 成都格瑞特高压容器有限责任公司 | High pressure sealing joint |
| CN110657131A (en) * | 2019-10-03 | 2020-01-07 | 江苏军宏机械有限公司 | Oil outlet mechanism of booster oil cylinder |
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| C06 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20140806 |