CN214533340U - Common rail pipe assembly and common rail fuel system with same - Google Patents
Common rail pipe assembly and common rail fuel system with same Download PDFInfo
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- CN214533340U CN214533340U CN202120093364.4U CN202120093364U CN214533340U CN 214533340 U CN214533340 U CN 214533340U CN 202120093364 U CN202120093364 U CN 202120093364U CN 214533340 U CN214533340 U CN 214533340U
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Abstract
The utility model belongs to the technical field of the engine fuel system, concretely relates to common rail pipe assembly and have its common rail fuel system. The common rail pipe assembly includes: the fuel oil pipe comprises at least two common rail pipe bodies, wherein a fuel oil channel is formed inside each common rail pipe body; the connecting piece, the connecting piece is including connecting swivel nut and high-pressure seal joint, connects the swivel nut cover and locates outside the high-pressure seal joint, connects the swivel nut and connects two adjacent common rail pipe bodies with detachable mode, and high-pressure seal joint presss from both sides and holds between two adjacent common rail pipe bodies, and high-pressure seal joint communicates two adjacent fuel oil passageway. According to the utility model discloses a common rail pipe assembly, the connection swivel nut of connecting piece pass through two adjacent common rail pipe bodies of threaded connection, connect the swivel nut cover and locate high-pressure sealing joint, and high-pressure sealing joint's both ends form the ring seal face with two adjacent common rail pipe bodies respectively to effectually prevent that high-pressure fuel from leaking from the junction between connecting piece and the common rail pipe body, avoid taking place the incident.
Description
Technical Field
The utility model belongs to the technical field of the engine fuel system, concretely relates to common rail pipe assembly and have its common rail fuel system.
Background
The common rail pipe is an important component of a common rail fuel system, and is mainly used for distributing high-pressure fuel provided by a fuel supply pump to each fuel injector and playing a role of a pressure accumulator. The common rail pipe is formed by integral forging mostly, because the length of the common rail pipe is limited by a forging and forming process, the conventional common rail pipe usually adopts a form of connecting a plurality of common rail pipe bodies, and fuel oil leakage can occur at the joint of the connection of the common rail pipes, so that safety accidents such as fire disasters are caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem of leakage of the prior common rail pipe at least. The purpose is realized by the following technical scheme:
the utility model discloses the first aspect provides a common rail pipe assembly, common rail pipe assembly includes:
the fuel oil pipe comprises at least two common rail pipe bodies, wherein a fuel oil channel is formed inside each common rail pipe body;
the connecting piece, the connecting piece is including connecting swivel nut and high-pressure seal joint, it locates to connect the swivel nut cover outside the high-pressure seal joint, connect the swivel nut and connect adjacent two with the detachable mode the common rail pipe body, high-pressure seal joint clamp is adjacent two between the common rail pipe body, high-pressure seal joint communicates two adjacent fuel oil passageway.
According to the utility model discloses common rail pipe assembly connects through the connecting piece between the common rail pipe body, specifically, the connection swivel nut of connecting piece passes through two adjacent common rail pipe bodies of threaded connection, connect the swivel nut cover and locate high-pressure sealing joint, two adjacent fuel oil passages of high-pressure sealing joint intercommunication, high-pressure sealing joint presss from both sides and holds between two adjacent common rail pipe bodies, and high-pressure sealing joint's both ends form the ring-shaped seal face with two adjacent common rail pipe bodies respectively, thereby effectually prevent that high-pressure fuel from leaking from the junction between connecting piece and the common rail pipe body, avoid taking place the incident.
In addition, according to the utility model discloses common rail pipe assembly, can also have following technical characteristics:
in some embodiments of the present invention, the connection screw sleeve is sleeved outside the high-pressure sealing joint in a manner that the connection screw sleeve can rotate relative to the high-pressure sealing joint.
The utility model discloses an in some embodiments, the both ends outer wall of connecting the swivel nut is equipped with left-handed thread and right-handed thread respectively, adjacent two pipe walls of sharing rail pipe body be provided with respectively with left-handed thread complex left-handed thread groove, and with right-handed thread complex right-handed thread groove.
In some embodiments of the present invention, a limiting flange is disposed on the connecting screw sleeve, and the limiting flange is located between the left-handed thread and the right-handed thread.
The utility model discloses an in some embodiments, common rail pipe assembly still includes the sleeve pipe, the cover pipe box is located common rail pipe, the sleeve pipe with form the annular chamber between the common rail pipe, be equipped with on the common rail pipe assembly and let out the leakage hole, it is used for the intercommunication to let out the leakage hole annular chamber and external environment.
The utility model discloses an in some embodiments, the quantity of sleeve pipe is two at least, is provided with the connecting block between two adjacent sleeve pipes, the connecting block cover is located outside the common rail pipe, the connecting block with form between the common rail pipe and hold the chamber, the inside of connecting block is formed with let out the leak hole, hold the chamber intercommunication the annular chamber with let out the leak hole.
The utility model discloses an in some embodiments, be formed with the oil pipe installation cavity in the connecting block, be formed with the oil pipe mounting hole on the common rail pipe, the oil pipe mounting hole with fuel oil channel intercommunication, the oil pipe installation cavity with the oil pipe mounting hole is used for installing oil pipe joint jointly.
In some embodiments of the present invention, the number of the connecting blocks is plural, and the plurality of connecting blocks are uniformly arranged along the length direction of the common rail pipe.
In some embodiments of the present invention, the connecting block is provided with a sealing ring between the casing pipes, and the sealing ring is sleeved outside the casing pipes.
The utility model discloses the second aspect provides a common rail fuel system, common rail fuel system includes the common rail pipe assembly, the common rail pipe assembly be according to above arbitrary embodiment the common rail pipe assembly.
According to the utility model discloses common rail fuel system connects through the connecting piece between the common rail pipe body, specifically, the connection swivel nut of connecting piece passes through two adjacent common rail pipe bodies of threaded connection, connect the swivel nut cover and locate high-pressure sealing joint, two adjacent fuel oil passages of high-pressure sealing joint intercommunication, high-pressure sealing joint presss from both sides and holds between two adjacent common rail pipe bodies, and high-pressure sealing joint's both ends form the ring-shaped seal face with two adjacent common rail pipe bodies respectively, thereby effectually prevent that high-pressure fuel from leaking from the junction between connecting piece and the common rail pipe body, avoid taking place the incident.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like parts are designated by like reference numerals throughout the drawings. In the drawings:
fig. 1 is a schematic axial view of an overall structure of a common rail pipe assembly according to an embodiment of the present invention;
FIG. 2 is a cross-sectional schematic view of a portion of the structure of the common rail assembly of FIG. 1;
FIG. 3 is a first enlarged fragmentary view of a portion of the structure of the rail assembly of FIG. 2;
fig. 4 is a second enlarged partial view of the overall structure of the common rail assembly of fig. 2.
The reference symbols in the drawings denote the following:
100: a common rail pipe assembly;
10: common rail pipe, 11: common rail pipe body, 111: fuel passage, 112: annular connection end, 113: accommodating tank, 12: connecting piece, 121: connection screw sleeve, 1211: position-limiting flange, 122: high-pressure sealing joint, 1221: through hole, 13: an oil pipe mounting hole;
20: a sleeve;
30: connecting block, 31: oil feed connecting block, 32: oil outlet connecting block, 33: a seal ring;
40: safety valve, 41: plugging piece, 42: an annular projection;
50: a common rail sensor;
101: ring cavity, 201: accommodating chamber, 301: and an oil pipe installation cavity.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and groups thereof.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and sections, these elements, components, regions, layers and sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For convenience of description, spatially relative terms, such as "inboard", "outboard", "below", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
As shown in fig. 1 to 4, an embodiment of the first aspect of the present invention provides a common rail pipe assembly 100, where the common rail pipe assembly 100 includes a common rail pipe 10, and the common rail pipe 10 includes: at least two common rail pipe bodies 11 and connecting piece 12, the inside of common rail pipe body 11 is formed with fuel passageway 111, connecting piece 12 is including connecting swivel nut 121 and high-pressure sealing joint 122, connects swivel nut 121 cover and locates high-pressure sealing joint 122, connects swivel nut 121 and connects two adjacent common rail pipe bodies 11 with detachable mode, and high-pressure sealing joint 122 centre gripping is between two adjacent common rail pipe bodies 11, and high-pressure sealing joint 122 communicates two adjacent fuel passageways 11.
According to the utility model discloses common rail pipe assembly 100, connect through connecting piece 12 between the common rail pipe body 11, specifically, connecting 12's connection swivel nut 121 passes through two adjacent common rail pipe bodies 11 of threaded connection, high-pressure sealing joint 122 is located to connection swivel nut 121 cover, two adjacent fuel oil passageway 111 of high-pressure sealing joint 122 intercommunication, high-pressure sealing joint 122 centre gripping is between two adjacent common rail pipe bodies 11, and high-pressure sealing joint 122's both ends form the ring-shaped seal face with two adjacent common rail pipe bodies 11 respectively, thereby effectually prevent that high-pressure fuel from leaking from the junction between connecting piece 12 and the common rail pipe body 11, avoid taking place the incident.
Specifically, as shown in fig. 3, both ends of the common rail pipe body 11 are provided with annular connection ends 112, the annular connection ends 122 are provided with internal threads, the outer wall of the connection thread insert 121 is provided with external threads adapted to the internal threads, and the connection thread insert 121 and the annular connection ends 112 are connected by matching the external threads with the internal threads. The annular connecting end 112 surrounds an accommodating groove 113, two ends of the connecting threaded sleeve 121 are respectively accommodated in the two accommodating grooves 113, the accommodating groove 113 is communicated with the fuel channel 111 through a hole with gradually changed diameter, the hole with gradually changed diameter is formed by an annular conical surface on the common rail pipe body 11, two ends of the high-pressure sealing joint 122 are both conical, and two ends of the high-pressure sealing joint 122 respectively form sealing surfaces with the two annular conical surfaces.
Further, the outer wall of the coupling nut 121 is provided with left-hand threads and right-hand threads. Left-hand threads and preferred threads are located on each end of the connecting threaded sleeve 121. The left-handed threads and the right-handed threads are respectively connected with the two adjacent common rail pipe bodies 10, so that the connection between the connecting threaded sleeve 121 and the two adjacent common rail pipe bodies 10 is effectively prevented from being loosened, and the connection reliability is ensured.
Furthermore, the connection screw sleeve 121 is provided with a limit flange 1211, the left-hand thread and the right-hand thread are respectively located at two ends of the limit flange 1211, and the limit flange 1211 is located between two adjacent annular connection ends 112 to limit the positions of the annular connection ends 112.
Further, a through hole 1221 is formed inside the high-pressure sealing joint 122, the through hole 1221 communicates with the two adjacent fuel passages 111, so that the high-pressure fuel smoothly flows through the high-pressure sealing joint 122, and the high-pressure sealing joint 122 is made of a pressure-resistant material, so that the high-pressure sealing joint 122 is prevented from being crushed under the pressure of the high-pressure fuel.
In some embodiments of the present invention, the connection screw 121 is slidably sleeved on the high pressure sealing joint 122 relative to the high pressure sealing joint 122. When the connecting piece 12 is connected with two adjacent common rail pipe bodies 11, the high-pressure sealing joint 122 can move relative to the connecting threaded sleeve 121, so that the high-pressure sealing joint 122 is prevented from being stressed unevenly, meanwhile, power transmission between the high-pressure sealing joint 122 and a sealing surface formed by the common rail pipe bodies 11 is avoided, and the sealing effect of the high-pressure sealing joint 122 is ensured.
In some embodiments of the present invention, as shown in fig. 4, the common rail pipe assembly 100 further includes a sleeve 20, the sleeve 20 is sleeved on the common rail pipe 10, and an annular cavity 101 is formed between the sleeve 20 and the common rail pipe 10. When the common rail pipe 10 has high pressure leakage, high pressure fuel oil leaks into the annular cavity 101 and is discharged through the leakage hole, so that safety accidents such as fire disasters and the like caused by the fact that the high pressure fuel oil is directly sprayed out of the common rail pipe 10 are prevented. The sleeve 20 can be an integrally cast structure, the integral structure is simple to install, the sleeve 20 can also be a segmented structure, the length of the sleeve 20 can be adjusted according to needs by the segmented structure, and the application range is wider.
The utility model discloses a some embodiments, the quantity of sleeve pipe 20 is two at least, and two adjacent sleeve pipes 20 are provided with connecting block 30, and common rail pipe 10 is located to connecting block 30 cover, and connecting block 30 and common rail pipe 10 between form and hold chamber 201, hold chamber 201 and annular chamber 101 intercommunication, be formed with the leak opening (not shown in the figure) in the connecting block 30, the leak opening intercommunication holds chamber 201 and external environment. The high-pressure fuel leaked from the common rail body 11 flows in the annular chamber 101, flows into the accommodating chamber 201 communicating with the annular chamber 101, and is discharged out of the common rail assembly 100 through the leakage hole communicating with the accommodating chamber 201, thereby discharging the high-pressure fuel from a designated position.
The utility model discloses an in some embodiments, be formed with oil pipe installation cavity 301 in the connecting block 30, be formed with oil pipe mounting hole 13 on the common rail pipe 10, oil pipe mounting hole 13 is extended to the inner wall of common rail pipe body 11 by the outer wall of common rail pipe body 11, and oil pipe installation cavity 301 communicates with oil pipe mounting hole 13, and oil pipe installation cavity 301 is used for installing oil pipe joint with oil pipe mounting hole 13 jointly. The fuel pipe joints are installed in the fuel pipe installation cavity 301 and the fuel pipe installation holes 13, and the fuel pipe joints extend into the fuel passage 111, so that high-pressure fuel in the fuel passage 111 can be output to a combustion chamber through the fuel pipe joints, or fuel in the oil pump enters the fuel passage 111 through the fuel pipe joints.
Specifically, the connecting block 30 is a plurality of, contains oil feed connecting block 31 and the connecting block 32 that produces oil in a plurality of connecting blocks 30, and a plurality of connecting blocks 32 that produce oil evenly arrange along the axial of common rail pipe 10, and the interval of a plurality of connecting blocks 32 that produce oil is the same with the interval of engine cylinder to make a plurality of connecting blocks 32 that produce oil respectively with a plurality of cylinders one-to-one, thereby reduce the length of defeated oil pipe, improve common rail pipe assembly 100's pleasing to the eye.
The number of the oil inlet connecting blocks 31 is one, and the oil inlet connecting blocks 31 are arranged at one end of the common rail pipe 10 and are located between two adjacent oil outlet connecting blocks 32.
As shown in fig. 1 and 2, a safety valve 40 and a rail pressure sensor 50 are connected to both ends of the common rail pipe 10, respectively, a blocking member 41 is interposed between the safety valve 40 and the common rail pipe, and the blocking member 41 is provided at one end of the fuel passage 111 to prevent high-pressure fuel from flowing out of the fuel passage 111. Specifically, the safety valve 40 is screwed with the common rail pipe body 10. The annular bulge 42 is arranged on the safety valve 40, the annular bulge 42 is sleeved at one end of the sleeve 20, and a sealing element is arranged between the annular bulge 42 and the sleeve 20 so as to ensure the tightness of the annular cavity 101.
The rail pressure sensor 50 is connected to the other end of the common rail 10 in a sealing manner, and the rail pressure sensor is also connected to the sleeve 20 in a sealing manner, so that high-pressure fuel is prevented from leaking from one end of the common rail 10, and the sealing performance of the annular chamber 101 is ensured.
In this embodiment, the connection blocks 30 are connected to the common rail pipe body 11 by bolts, so that the positions of the connection blocks 30 are fixed, and after the positions of the connection blocks 30 are fixed, the positions of the sleeves 20 between two adjacent connection blocks 30 are limited by the connection blocks 30, or the positions of the sleeves between the connection block 30 and the rail pressure sensor, and the sleeves between the connection block 30 and the safety valve 40 are fixed, so that the sleeves 20 are prevented from moving axially.
In addition, a plurality of protrusions are respectively arranged at two ends of each sleeve 20 and are arranged along the inner wall of the sleeve 20, so that a gap between the sleeve 20 and the common rail pipe body 11 is ensured, and the sleeve 20 is prevented from moving along the radial direction of the common rail pipe body 11.
The utility model discloses an in some embodiments, common rail pipe 10 is located to the middle part cover of connecting block 30, and two adjacent sleeve pipe 20 tip are located to the both ends cover respectively of connecting block 30, are equipped with sealing washer 33 between connecting block 30 and the sleeve pipe 20, and sleeve pipe 20 is located to sealing washer 33 cover, and the leakproofness of annular chamber 101 is guaranteed to sealing washer 33, avoids the fuel to take place to leak in annular chamber 101.
The embodiment of the utility model provides a common rail fuel system is proposed to the embodiment of second aspect, and common rail fuel system includes common rail pipe subassembly 100, and common rail pipe subassembly 100 is common rail pipe subassembly 100 according to any one above embodiment.
According to the utility model discloses common rail fuel system, connect through connecting piece 12 between the common rail pipe body 11, specifically, connecting piece 12's connection swivel nut 121 passes through two adjacent common rail pipe bodies 11 of threaded connection, connect swivel nut 121 cover and locate high-pressure sealing joint 122, two adjacent fuel oil passageway 111 of high-pressure sealing joint 122 intercommunication, high-pressure sealing joint 122 centre gripping is between two adjacent common rail pipe bodies 11, and high-pressure sealing joint 122's both ends form the ring-shaped seal face with two adjacent common rail pipe bodies 11 respectively, thereby effectually prevent that high-pressure fuel from leaking from the junction between connecting piece 12 and the common rail pipe body 11, avoid taking place the incident.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A common rail pipe assembly, comprising a common rail pipe, the common rail pipe comprising:
the fuel oil pipe comprises at least two common rail pipe bodies, wherein a fuel oil channel is formed inside each common rail pipe body;
the connecting piece, the connecting piece is including connecting swivel nut and high-pressure seal joint, it locates to connect the swivel nut cover outside the high-pressure seal joint, connect the swivel nut and connect adjacent two with the detachable mode the common rail pipe body, high-pressure seal joint clamp is adjacent two between the common rail pipe body, high-pressure seal joint communicates two adjacent fuel oil passageway.
2. The common rail pipe assembly according to claim 1, wherein the connection nut is rotatably disposed about the high pressure seal fitting.
3. The common rail pipe assembly according to claim 1, wherein the outer walls of both ends of the connection screw sleeve are respectively provided with a left-handed thread and a right-handed thread, and two pipe walls of two adjacent common rail pipe bodies are respectively provided with a left-handed thread groove matched with the left-handed thread and a right-handed thread groove matched with the right-handed thread.
4. The common rail pipe assembly of claim 3, wherein said connection nut has a stop flange thereon, said stop flange being located between said left-hand thread and said right-hand thread.
5. The common rail pipe assembly according to any one of claims 1 to 4, further comprising a sleeve, wherein the sleeve is sleeved on the common rail pipe, an annular cavity is formed between the sleeve and the common rail pipe, and a leakage hole is formed in the common rail pipe assembly and is used for communicating the annular cavity with the external environment.
6. The common rail pipe assembly of claim 5, wherein the number of the sleeves is at least two, a connecting block is disposed between two adjacent sleeves, the connecting block is sleeved outside the common rail pipe, an accommodating cavity is formed between the connecting block and the common rail pipe, the leakage hole is formed inside the connecting block, and the accommodating cavity communicates the annular cavity with the leakage hole.
7. The common rail pipe assembly according to claim 6, wherein a pipe mounting cavity is formed in the connecting block, and a pipe mounting hole is formed in the common rail pipe, the pipe mounting hole communicating with the fuel passage, the pipe mounting cavity and the pipe mounting hole being used together for mounting a pipe joint.
8. The common rail pipe assembly of claim 7, wherein said connection block is plural in number, and a plurality of connection blocks are uniformly arranged along a length direction of said common rail pipe.
9. The common rail pipe assembly according to claim 6, wherein a sealing ring is disposed between the connecting block and the casing pipe, and the sealing ring is sleeved outside the casing pipe.
10. A common rail fuel system, characterized in that it comprises a common rail pipe assembly, which is a common rail pipe assembly according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120093364.4U CN214533340U (en) | 2021-01-13 | 2021-01-13 | Common rail pipe assembly and common rail fuel system with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120093364.4U CN214533340U (en) | 2021-01-13 | 2021-01-13 | Common rail pipe assembly and common rail fuel system with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214533340U true CN214533340U (en) | 2021-10-29 |
Family
ID=78302307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120093364.4U Active CN214533340U (en) | 2021-01-13 | 2021-01-13 | Common rail pipe assembly and common rail fuel system with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214533340U (en) |
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2021
- 2021-01-13 CN CN202120093364.4U patent/CN214533340U/en active Active
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