CN115095725A - High pressure fuel pipe multi-level sealing structure - Google Patents

High pressure fuel pipe multi-level sealing structure Download PDF

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Publication number
CN115095725A
CN115095725A CN202210779983.8A CN202210779983A CN115095725A CN 115095725 A CN115095725 A CN 115095725A CN 202210779983 A CN202210779983 A CN 202210779983A CN 115095725 A CN115095725 A CN 115095725A
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CN
China
Prior art keywords
pipe
sealing
connecting pipe
pressure oil
thread
Prior art date
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Granted
Application number
CN202210779983.8A
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Chinese (zh)
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CN115095725B (en
Inventor
张志伟
苏玉栋
喻康力
张胜
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dongfeng Shiyan Automotive Pipe Ltd
Original Assignee
Dongfeng Shiyan Auto Tube Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dongfeng Shiyan Auto Tube Co ltd filed Critical Dongfeng Shiyan Auto Tube Co ltd
Priority to CN202210779983.8A priority Critical patent/CN115095725B/en
Publication of CN115095725A publication Critical patent/CN115095725A/en
Application granted granted Critical
Publication of CN115095725B publication Critical patent/CN115095725B/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/005—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts comprising locking means for the threaded member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
    • F16L19/0206—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the collar not being integral with the pipe
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
    • F16L19/0212—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member using specially adapted sealing means
    • F16L19/0218—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member using specially adapted sealing means comprising only sealing rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
    • F16L19/0212—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member using specially adapted sealing means
    • F16L19/0225—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member using specially adapted sealing means without sealing rings

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

The invention provides a multi-layer sealing structure of a high-pressure oil pipe, relates to the technical field of oil pipe sealing, and solves the problem that diesel engine oil is mixed due to failure of a pipe end structure of the high-pressure oil pipe; comprises a threaded connecting pipe; two sections of internal threads are formed on the inner side of the threaded connecting pipe; the oil sprayer connecting pipe is arranged on the inner side of the threaded connecting pipe; the sealing ring is arranged on the outer side of the oil sprayer connecting pipe; the high-pressure oil pipe is arranged on the inner side of the threaded connecting pipe; the supporting tube is arranged on the inner side of the high-pressure oil pipe; the high-pressure oil pipe is sealed in one level through being formed between high-pressure oil pipe and the sprayer connecting pipe, the high-pressure oil pipe is rigidly supported through the supporting pipe, the end part of the threaded connecting pipe is provided with a threaded sealing seat in threaded connection, the positioning block clamps the high-pressure oil pipe, so that the positioning block forms second-level sealing for the high-pressure oil pipe, the sealing ring forms third-level sealing for sealing the threaded connecting pipe and the sprayer connecting pipe, and the threaded connecting sleeve forms fourth-level sealing for the high-pressure oil pipe.

Description

High pressure fuel pipe multi-level sealing structure
Technical Field
The invention belongs to the technical field of oil pipe sealing, and particularly relates to a multi-layer sealing structure of a high-pressure oil pipe.
Background
The oil pipe is a pipeline for connecting the oil pump and an engine oil nozzle, fuel oil is provided through the oil pipe, the oil pipe provides power-assisted oil for the steering engine, and therefore the purpose of reducing steering resistance is achieved, the oil pipe is divided into low pressure and high pressure, the joint of the high-pressure oil pipe needs to be absolutely sealed when in use, and in order to enable the joint of the oil pipe to be better sealed, the oil pipe needs to be sealed in a multilayer mode, and particularly the high-pressure oil pipe multilayer sealing structure is achieved.
Traditional high pressure fuel pipe seal structure is that the conical surface is sealed with the conical surface, it is sealed with the conical surface through the sphere in addition, and high pressure fuel pipe's seal structure is sealed for the individual layer, it is sealed to high pressure fuel pipe extrusion through a threaded connection sleeve, in case high pressure fuel pipe seals up inefficacy, can cause diesel oil to sneak into in the machine oil, cause machine oil can be diluted, viscosity reduces, machine oil pressure descends, it is lubricated insufficient, destroy the lubrication action, the scuffing of a cylinder and a panting appear in light person, the phenomenon of armful panting appears in heavy person, high pressure fuel pipe can warp after receiving the extrusion force simultaneously, influence high pressure fuel pipe's sealed effect.
Disclosure of Invention
In order to solve the technical problem, the invention provides a multi-level sealing structure of a high-pressure oil pipe, which aims to solve the problem that the sealing structure of the high-pressure oil pipe is single-layer sealing, the high-pressure oil pipe is extruded and sealed through a threaded connecting sleeve, and the high-pressure oil pipe deforms after being extruded.
The invention relates to a multi-layer sealing structure of a high-pressure oil pipe, which is achieved by the following specific technical means:
a multi-level sealing structure of a high-pressure oil pipe comprises a threaded connecting pipe;
two sections of internal threads are formed on the inner side of the threaded connecting pipe; the oil sprayer connecting pipe is arranged on the inner side of the threaded connecting pipe;
the sealing ring is arranged on the outer side of the oil injector connecting pipe;
the high-pressure oil pipe is arranged on the inner side of the threaded connecting pipe;
the supporting pipe is arranged on the inner side of the high-pressure oil pipe, and a baffle ring is arranged at the end part of the inner side of the high-pressure oil pipe; the sealing bush is arranged between the threaded connecting pipe and the high-pressure oil pipe;
and the thread sealing seat is arranged at the end part of the thread connecting pipe.
Preferably, the threaded connection pipe comprises:
the positioning block is arranged on the inner side of the threaded connecting pipe, the positioning block and the sealing bushing are respectively provided with a conical surface, the positioning block is in close contact with the sealing bushing through the conical surface, and the inner side of the sealing bushing is in contact with the outer wall of the high-pressure oil pipe;
the oil drainage grooves are arranged on the inner side of the positioning block in an annular array shape, and the number of the oil drainage grooves is three;
the extrusion block is provided with an inclined plane with a conical structure and is arranged on the outer side of the threaded connecting pipe, and the extrusion block is in contact with the inner wall of the threaded sealing seat;
and the locking groove is arranged on the outer side of the extrusion block in an arc array shape and is of a V-shaped structure.
Preferably, the oil sprayer connecting pipe is provided with an annular groove, the sealing ring is clamped in the annular groove of the oil sprayer connecting pipe, and two side faces of the sealing ring are provided with second annular grooves.
Preferably, a reinforcing ring is installed on the inner side of the sealing ring, first annular grooves are formed in the outer side and the inner side of the sealing ring, the cross section of each first annular groove is of a U-shaped structure, and the sealing ring is in contact with the inner wall of the threaded connecting pipe.
Preferably, a sealing head is arranged at the end part of the high-pressure oil pipe, the sealing head is of a conical hollow structure and is communicated with the high-pressure oil pipe, the sealing head is respectively contacted with the oil sprayer connecting pipe and the sealing bush, a sealing ring is arranged on the outer side of the sealing head, a sealing groove is formed in the oil sprayer connecting pipe and the sealing bush, and the sealing ring of the sealing head is clamped in the sealing groove of the oil sprayer connecting pipe.
Preferably, the outer side of the supporting pipe is provided with a locking ring, the inner side of the high-pressure oil pipe is provided with an annular groove, and the supporting pipe is clamped on the inner side of the high-pressure oil pipe through the locking ring.
Preferably, the fuel injector connecting pipe is provided with an external thread, the inner side of the fuel injector connecting pipe is provided with an inclined plane with a conical structure, the thread sealing seat is provided with a thread connecting sleeve, and the inner side of the thread connecting sleeve is in contact with the outer wall of the high-pressure fuel pipe.
Preferably, the thread sealing seat comprises:
the screwing bulge is of a hexagonal structure and is arranged on the outer side of the thread sealing seat;
the extension block is arranged on the outer side of the thread sealing seat;
the locking piece, the locking piece is in the bottom that extends the piece, and the locking piece is the V-arrangement structure, and the locking piece joint is in the inboard of locking groove, and the outside that extends the piece has one to break the piece off with the fingers and thumb.
Compared with the prior art, the invention has the following beneficial effects:
1. locking the sealing head through the sealing bush, thereby make the sealing head lock high pressure fuel pipe, through the setting of sprayer connecting pipe, the sprayer connecting pipe closes soon through the screw thread, apply axial force to high pressure fuel pipe, high pressure fuel pipe upset package produces plastic deformation, form the sealed diesel oil of annular sealing strip, make to form high pressure fuel pipe's one-level between high pressure fuel pipe and the sprayer connecting pipe sealed, carry out rigid support to high pressure fuel pipe through the stay tube, the phenomenon that high pressure fuel pipe receives the compression force deformation has been avoided, also make the outside of high pressure fuel pipe can be better sealed simultaneously.
2. The end of the threaded connection pipe is provided with a threaded sealing seat in threaded connection, and after the threaded sealing seat is installed, the extrusion block and the threaded sealing seat form extrusion force, so that the threaded sealing seat compresses the positioning block, and the positioning block clamps the high-pressure oil pipe, so that the positioning block forms secondary sealing on the high-pressure oil pipe.
3. The inboard of threaded connection pipe is provided with three draining groove, and after the sealed inefficacy of sprayer connecting pipe, the sealing washer can produce sealed effect, and diesel oil can get into draining inslot, effectually keeps apart diesel oil and machine oil, seals between threaded connection pipe and the sprayer connecting pipe through the sealing washer, and the sealing washer forms tertiary sealed threaded connection pipe and sprayer connecting pipe and seals.
4. The locking block locks the thread sealing seat, so that the loosening of the thread sealing seat is avoided, the thread connecting sleeve of the thread sealing seat is contacted with the outer wall of the high-pressure oil pipe, the thread connecting sleeve forms four-stage sealing on the high-pressure oil pipe, and the internal thread of the thread connecting pipe locks the thread sealing seat.
Drawings
FIG. 1 is a schematic side view of the main body of the present invention after assembly;
FIG. 2 is a schematic view of a semi-sectional axial side configuration of the present invention;
FIG. 3 is a schematic front view of the FIG. 2 embodiment of the present invention;
FIG. 4 is a schematic side structure view of a main body of the present invention cut away and disassembled;
FIG. 5 is a schematic illustration of a split-axis side configuration of the body of the present invention;
FIG. 6 is a schematic bottom view isometric view of the present invention shown in FIG. 5;
FIG. 7 is a schematic side view of the main body of the present invention in half section, taken apart;
FIG. 8 is an enlarged view of the structure at A of FIG. 1 according to the present invention;
FIG. 9 is an enlarged view of FIG. 2 at B of the present invention;
FIG. 10 is an enlarged view of FIG. 2 at C;
FIG. 11 is an enlarged view of FIG. 5 at D in accordance with the present invention;
fig. 12 is an enlarged view of fig. 6 at E according to the present invention.
In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:
1. a threaded connection pipe; 101. positioning a block; 102. an oil drainage groove; 103. extruding the block; 104. a locking groove; 2. a fuel injector connecting pipe; 3. a seal ring; 301. a reinforcing ring; 4. a high pressure oil pipe; 401. a sealing head; 5. supporting a tube; 6. a seal bushing; 7. a thread seal seat; 701. screwing the bulge; 702. an extension block; 703. and locking the block.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example (b):
as shown in figures 1 to 12:
the invention provides a multi-layer sealing structure of a high-pressure oil pipe, which comprises a threaded connecting pipe 1;
two sections of internal threads are formed in the inner side of the threaded connecting pipe 1, the threaded connecting pipe 1 comprises a positioning block 101, oil drainage grooves 102 and an extrusion block 103, the positioning block 101 is arranged on the inner side of the threaded connecting pipe 1, the positioning block 101 and the sealing bush 6 both have a conical surface, the positioning block 101 and the sealing bush 6 are in close contact through the conical surfaces, the inner side of the sealing bush 6 is in contact with the outer wall of the high-pressure oil pipe 4, the sealing bush 6 seals between the positioning block 101 and the high-pressure oil pipe 4, the oil drainage grooves 102 are arranged on the inner side of the positioning block 101 in an annular array shape, the oil drainage grooves 102 are three in total, after the fuel injector connecting pipe 2 fails in sealing, the sealing rings 3 can generate a sealing effect, diesel can enter the oil drainage grooves 102 and effectively isolate the diesel oil from the engine oil, the extrusion block 103 is provided with an inclined surface with a conical structure, the extrusion block 103 is arranged on the outer side of the threaded connecting pipe 1, and the extrusion block 103 is in contact with the inner wall of the threaded sealing seat 7, after the threaded sealing seat 7 is installed, the extrusion block 103 and the threaded sealing seat 7 form extrusion force, so that the threaded sealing seat 7 compresses the positioning block 101, the positioning block 101 clamps the high-pressure oil pipe 4, the positioning block 101 forms secondary sealing on the high-pressure oil pipe 4, the locking groove 104 is arranged on the outer side of the extrusion block 103 in an arc array shape, the locking groove 104 is of a V-shaped structure, and the locking groove 104 locks the locking block 703;
the oil injector connecting pipe 2 is arranged on the inner side of the threaded connecting pipe 1, the oil injector connecting pipe 2 is provided with an annular groove, the sealing ring 3 is clamped in the annular groove of the oil injector connecting pipe 2, therefore, the annular groove of the oil injector connecting pipe 2 locks the sealing ring 3, two side surfaces of the sealing ring 3 are provided with second annular grooves, the second annular grooves can deform after being stressed, the sealing ring 3 is firmly clamped in the annular groove of the oil injector connecting pipe 2, meanwhile, the second annular grooves also solve the problem that the sealing ring 3 expands with heat and contracts with cold, and the sealing ring 3 forms three-level sealing to seal the threaded connecting pipe 1 and the oil injector connecting pipe 2;
the sealing ring 3 is arranged on the outer side of the oil sprayer connecting pipe 2, the reinforcing ring 301 is arranged on the inner side of the sealing ring 3, the reinforcing ring 301 is used for rigidly supporting the sealing ring 3, the phenomenon that the sealing ring 3 cannot rebound due to stress deformation is avoided, first annular grooves are formed in the outer side and the inner side of the sealing ring 3, the cross section of each first annular groove is of a U-shaped structure, the sealing ring 3 is in contact with the inner wall of the threaded connecting pipe 1, the first annular grooves enable the sealing ring 3 to better seal the space between the threaded connecting pipe 1 and the oil sprayer connecting pipe 2, meanwhile, the first annular grooves block leaked oil, and therefore the sealing performance of the sealing ring 3 is enhanced;
the high-pressure oil pipe 4 is installed on the inner side of the threaded connecting pipe 1, a sealing head 401 is arranged at the end part of the high-pressure oil pipe 4, the sealing head 401 is of a conical hollow structure, the sealing head 401 is communicated with the high-pressure oil pipe 4, primary sealing of the high-pressure oil pipe 4 is formed between the sealing head 401 and the oil injector connecting pipe 2, the sealing head 401 is respectively contacted with the oil injector connecting pipe 2 and the sealing bush 6, the sealing bush 6 locks the sealing head 401, so that the sealing head 401 locks the high-pressure oil pipe 4, a sealing ring is arranged on the outer side of the sealing head 401, the oil injector connecting pipe 2 and the sealing bush 6 are provided with sealing grooves, the sealing ring of the sealing head 401 is clamped in the sealing groove of the oil injector connecting pipe 2, and at the moment, the sealing ring further seals the sealing head 401, so that the sealing head 401 can better seal the end part of the high-pressure oil pipe 4;
the supporting pipe 5 is installed on the inner side of the high-pressure oil pipe 4, and a baffle ring is arranged at the end part of the inner side of the high-pressure oil pipe 4, so that the supporting pipe 5 is installed on the inner side of the high-pressure oil pipe 4 more firmly;
the sealing bush 6 is arranged between the threaded connecting pipe 1 and the high-pressure oil pipe 4;
the thread seal seat 7 is characterized in that the thread seal seat 7 is installed at the end part of the thread connecting pipe 1, the oil sprayer connecting pipe 2 is provided with an external thread, the external thread locks the oil sprayer connecting pipe 2 at the inner side of the thread connecting pipe 1, the inner side of the oil sprayer connecting pipe 2 is provided with an inclined plane with a conical structure, the inclined plane with the conical structure enables the oil sprayer connecting pipe 2 to better seal the end part of the high-pressure oil pipe 4, the thread seal seat 7 is provided with a thread connecting sleeve, the inner side of the thread connecting sleeve is contacted with the outer wall of the high-pressure oil pipe 4, so that the thread connecting sleeve forms four-stage seal for the high-pressure oil pipe 4, the thread seal seat 7 is locked by the other section of internal thread of the thread connecting pipe 1, the thread seal seat 7 comprises a screwing protrusion 701, an extension block 702 and a locking block 703, the screwing protrusion 701 is of a hexagonal structure, the screwing protrusion 701 is arranged at the outer side of the thread seal seat 7, the thread seal seat 7 is rotated by the screwing protrusion 701, twist the hexagonal structure convenience of moving protruding 701 and be connected with the spanner, extend block 702 in the outside of thread seal seat 7, extend block 702 and extend locking block 703, locking block 703 is in the bottom that extends block 702, locking block 703 is the V-arrangement structure, locking block 703 joint is in the inboard that locks groove 104, locking block 703 locks thread seal seat 7 this moment, the not hard up of thread seal seat 7 has been avoided, there is one to break off with the fingers and thumb the piece in the outside that extends block 702, will extend block 702 and upwards break off with the fingers and thumb through breaking off with the fingers and thumb the piece, thereby make things convenient for the dismantlement of thread seal seat 7.
In another embodiment, a friction protrusion is arranged on the outer side of the fuel injector connecting pipe 2, and the fuel injector connecting pipe 2 can be conveniently rotated through the friction protrusion.
The specific use mode and function of the embodiment are as follows:
when the oil sprayer connecting pipe is used, the supporting pipe 5 is firstly installed on the inner side of the high-pressure oil pipe 4 to complete rigid support of the high-pressure oil pipe 4, the sealing bush 6 is installed on the outer side of the high-pressure oil pipe 4, the high-pressure oil pipe 4 and the sealing bush 6 are installed on the inner side of the threaded connecting pipe 1 to complete installation of the high-pressure oil pipe 4, the sealing ring 3 is installed in the annular groove of the oil sprayer connecting pipe 2, the oil sprayer connecting pipe 2 is installed on the inner side of the threaded connecting pipe 1 through external threads, the sealing head 401 is respectively contacted with the oil sprayer connecting pipe 2 and the sealing bush 6 at the moment, the sealing bush 6 locks the sealing head 401, so that the sealing head 401 locks the high-pressure oil pipe 4, a first-level seal of the high-pressure oil pipe 4 is formed between the sealing head 401 and the oil sprayer connecting pipe 2, and after the oil sprayer connecting pipe 2 fails in sealing, the sealing ring 3 can generate a sealing effect, and diesel oil can enter the oil drainage groove 102, diesel oil is effectively isolated from engine oil;
the second annular groove of the sealing ring 3 deforms after being stressed, so that the sealing ring 3 is firmly clamped in the annular groove of the oil sprayer connecting pipe 2, meanwhile, the problem that the sealing ring 3 expands with heat and contracts with cold is solved by the second annular groove, the sealing ring 3 is in contact with the inner wall of the threaded connecting pipe 1, and the sealing ring 3 forms three-stage sealing to seal the threaded connecting pipe 1 and the oil sprayer connecting pipe 2;
the thread sealing seat 7 is installed at the end part of the thread connecting pipe 1 through external threads, when the thread sealing seat 7 is installed, the screwing protrusion 701 is screwed through a wrench, after the thread sealing seat 7 is installed, the extrusion block 103 and the thread sealing seat 7 form extrusion force, so that the thread sealing seat 7 compresses the positioning block 101, and the positioning block 101 clamps the high-pressure oil pipe 4, so that the positioning block 101 forms secondary sealing on the high-pressure oil pipe 4;
after thread seal seat 7 installs, locking block 703 joint is in the inboard of locking groove 104, locking block 703 locks thread seal seat 7, the not hard up of thread seal seat 7 has been avoided, when thread seal seat 7 is dismantled, will extend piece 702 and upwards break off with the fingers and thumb through breaking off with the fingers and thumb the piece, then dismantle thread seal seat 7, the thread connecting sleeve of thread seal seat 7 contacts with high pressure fuel pipe 4's outer wall, make the thread connecting sleeve form the level four sealedly to high pressure fuel pipe 4, the internal thread of threaded connection pipe 1 locks thread seal seat 7.
The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims (9)

1. The utility model provides a high pressure fuel pipe multilevel seal structure which characterized in that: comprises a threaded connecting pipe (1);
two sections of internal threads are formed on the inner side of the threaded connecting pipe (1); the oil sprayer connecting pipe (2) is arranged on the inner side of the threaded connecting pipe (1);
the sealing ring (3) is arranged on the outer side of the oil sprayer connecting pipe (2);
the high-pressure oil pipe (4), the high-pressure oil pipe (4) is installed on the inner side of the threaded connecting pipe (1);
the supporting pipe (5), the supporting pipe (5) is installed on the inner side of the high-pressure oil pipe (4), and a baffle ring is arranged at the end position of the inner side of the high-pressure oil pipe (4);
the sealing bush (6), the said sealing bush (6) is installed between threaded connection pipe (1) and high-pressure oil line (4);
the thread sealing seat (7), the end at threaded connection pipe (1) is installed in thread sealing seat (7).
2. The multi-stage sealing structure of the high-pressure oil pipe as claimed in claim 1, wherein: the threaded connecting pipe (1) comprises:
the positioning block (101) is arranged on the inner side of the threaded connecting pipe (1), the positioning block (101) and the sealing bushing (6) are both provided with a conical surface, the positioning block (101) and the sealing bushing (6) are in tight contact through the conical surfaces, and the inner side of the sealing bushing (6) is in contact with the outer wall of the high-pressure oil pipe (4);
the oil drainage grooves (102) are arranged on the inner side of the positioning block (101) in an annular array shape, and the number of the oil drainage grooves (102) is three.
3. The multi-stage sealing structure of the high-pressure oil pipe as claimed in claim 1, wherein: threaded connection pipe (1) still including:
the extrusion block (103) is provided with an inclined plane with a conical structure, the extrusion block (103) is arranged on the outer side of the threaded connecting pipe (1), and the extrusion block (103) is in contact with the inner wall of the threaded sealing seat (7);
and the locking groove (104), the locking groove (104) is arranged on the outer side of the extrusion block (103) in an arc array shape, and the locking groove (104) is of a V-shaped structure.
4. The multi-stage sealing structure of the high-pressure oil pipe as claimed in claim 1, wherein: an annular groove is formed in the oil sprayer connecting pipe (2), the sealing ring (3) is clamped in the annular groove of the oil sprayer connecting pipe (2), and second annular grooves are formed in two side faces of the sealing ring (3).
5. The multi-stage sealing structure of the high-pressure oil pipe as claimed in claim 1, wherein: a reinforcing ring (301) is installed to the inboard of sealing washer (3), and first ring channel has all been seted up to the outside and the inboard of sealing washer (3), and the cross-section of first ring channel is the U-shaped structure, and sealing washer (3) contact with the inner wall of threaded connection pipe (1).
6. The multi-stage sealing structure of the high-pressure oil pipe as claimed in claim 1, wherein: the tip of high pressure fuel pipe (4) has one sealed head (401), sealed head (401) are circular cone hollow structure, sealed head (401) and high pressure fuel pipe (4) are linked together, sealed head (401) contact with sprayer connecting pipe (2), sealing bush (6) respectively, there is the sealing ring outside of sealed head (401), the seal groove has been seted up in sprayer connecting pipe (2) and sealing bush (6), the sealing ring joint of sealed head (401) is in the seal groove of sprayer connecting pipe (2).
7. The multi-stage sealing structure of the high-pressure oil pipe as claimed in claim 1, wherein: the outside of stay tube (5) has the locking ring, and the ring channel has been seted up to the inboard of high pressure fuel pipe (4), and stay tube (5) pass through the inboard of locking ring joint in high pressure fuel pipe (4).
8. The multi-stage sealing structure of the high-pressure oil pipe as claimed in claim 1, wherein: the fuel injector connecting pipe (2) is provided with an external thread, the inner side of the fuel injector connecting pipe (2) is provided with an inclined plane with a conical structure, the thread sealing seat (7) is provided with a thread connecting sleeve, and the inner side of the thread connecting sleeve is contacted with the outer wall of the high-pressure fuel pipe (4).
9. The multi-stage sealing structure of the high-pressure oil pipe as claimed in claim 3, wherein: the thread sealing seat (7) comprises:
the screwing boss (701), the screwing boss (701) is of a hexagonal structure, and the screwing boss (701) is arranged on the outer side of the thread sealing seat (7);
the extension block (702), the extension block (702) is outside the thread sealing seat (7);
the locking block (703) is arranged at the bottom of the extension block (702), the locking block (703) is of a V-shaped structure, the locking block (703) is clamped on the inner side of the locking groove (104), and the outer side of the extension block (702) is provided with an wrestling block.
CN202210779983.8A 2022-07-04 2022-07-04 Multi-level sealing structure of high-pressure oil pipe Active CN115095725B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210779983.8A CN115095725B (en) 2022-07-04 2022-07-04 Multi-level sealing structure of high-pressure oil pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210779983.8A CN115095725B (en) 2022-07-04 2022-07-04 Multi-level sealing structure of high-pressure oil pipe

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19817633A1 (en) * 1998-04-21 1999-11-04 Ruberg Mischtechnik Kg Ring nut for pipe union made in two interlocking halves
DE10225960C1 (en) * 2002-06-11 2003-10-02 Dunlop Hiflex Gmbh Tube fitting, for high pressure, uses has sealing head with male fitting having balancing bore forming flow channel for medium passing through fitting on low pressure side of sealing device provided on sealing head
US20050264005A1 (en) * 2004-05-31 2005-12-01 Jamie Norman Pipe coupling
CN102840402A (en) * 2011-10-27 2012-12-26 南通天华和睿科技创业有限公司 Anti-leakage pipeline joint
CN202708381U (en) * 2012-07-18 2013-01-30 东风（十堰）汽车管业有限公司 End structure of high-pressure oil pipe
CN104197019A (en) * 2014-08-15 2014-12-10 哈尔滨东安发动机（集团）有限公司 Multi-sealing structure
CN104675593A (en) * 2013-11-28 2015-06-03 嘉兴市凯斯通讯器材有限公司 High-pressure oil pipe
CN204961138U (en) * 2015-07-17 2016-01-13 河北华北柴油机有限责任公司 High pressure fuel pipe pipe end structure
CN107061885A (en) * 2017-06-21 2017-08-18 海盐县秦山液压机械厂 A kind of high leakproofness ferrule-type compression joint
CN107288788A (en) * 2017-06-30 2017-10-24 东风（十堰）汽车管业有限公司 A kind of design method of high-pressure oil pipe structure

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19817633A1 (en) * 1998-04-21 1999-11-04 Ruberg Mischtechnik Kg Ring nut for pipe union made in two interlocking halves
DE10225960C1 (en) * 2002-06-11 2003-10-02 Dunlop Hiflex Gmbh Tube fitting, for high pressure, uses has sealing head with male fitting having balancing bore forming flow channel for medium passing through fitting on low pressure side of sealing device provided on sealing head
US20050264005A1 (en) * 2004-05-31 2005-12-01 Jamie Norman Pipe coupling
CN102840402A (en) * 2011-10-27 2012-12-26 南通天华和睿科技创业有限公司 Anti-leakage pipeline joint
CN202708381U (en) * 2012-07-18 2013-01-30 东风（十堰）汽车管业有限公司 End structure of high-pressure oil pipe
CN104675593A (en) * 2013-11-28 2015-06-03 嘉兴市凯斯通讯器材有限公司 High-pressure oil pipe
CN104197019A (en) * 2014-08-15 2014-12-10 哈尔滨东安发动机（集团）有限公司 Multi-sealing structure
CN204961138U (en) * 2015-07-17 2016-01-13 河北华北柴油机有限责任公司 High pressure fuel pipe pipe end structure
CN107061885A (en) * 2017-06-21 2017-08-18 海盐县秦山液压机械厂 A kind of high leakproofness ferrule-type compression joint
CN107288788A (en) * 2017-06-30 2017-10-24 东风（十堰）汽车管业有限公司 A kind of design method of high-pressure oil pipe structure

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