CN112178349A - A connect seal assembly for high pressure oil rail helium seals test - Google Patents
A connect seal assembly for high pressure oil rail helium seals test Download PDFInfo
- Publication number
- CN112178349A CN112178349A CN202011048425.1A CN202011048425A CN112178349A CN 112178349 A CN112178349 A CN 112178349A CN 202011048425 A CN202011048425 A CN 202011048425A CN 112178349 A CN112178349 A CN 112178349A
- Authority
- CN
- China
- Prior art keywords
- pressure
- sealing
- joint
- pressure measuring
- face
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 31
- 229910052734 helium Inorganic materials 0.000 title claims abstract description 20
- 239000001307 helium Substances 0.000 title claims abstract description 20
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 238000007789 sealing Methods 0.000 claims abstract description 80
- 239000000463 material Substances 0.000 claims abstract description 13
- 238000009434 installation Methods 0.000 claims description 20
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 13
- 229910052802 copper Inorganic materials 0.000 claims description 13
- 239000010949 copper Substances 0.000 claims description 13
- 238000009530 blood pressure measurement Methods 0.000 claims description 8
- 239000000446 fuel Substances 0.000 claims description 4
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 31
- 239000010935 stainless steel Substances 0.000 description 7
- 229910001220 stainless steel Inorganic materials 0.000 description 7
- 238000013461 design Methods 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 210000001503 joint Anatomy 0.000 description 3
- 238000003754 machining Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
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
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/10—Means for stopping flow from or in pipes or hoses
- F16L55/11—Plugs
- F16L55/1108—Plugs fixed by screwing or by means of a screw-threaded ring
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/061—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with positioning means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention relates to a connecting and sealing assembly for a high-pressure oil rail helium sealing test, which comprises a pressure measuring end joint, wherein a vent hole is formed in the middle of the pressure measuring end joint, a mounting hole communicated with the vent hole is formed in the middle of the outer part of the pressure measuring end joint, an airtight plug for sealing the pressure measuring end joint is arranged in the mounting hole, the airtight plug is of a large-end-face structure, the inner end face of the airtight plug is a flat end face, and the inner end face of the airtight plug is sealed with the outer end face of the pressure measuring end joint. According to the invention, the structure of the airtight plug is changed into a large-end-face structure, the original bottom in the mounting hole is used as a sealing face, the inner side end face of the airtight plug and the outer side end face of the pressure measuring end joint are used as sealing faces, and acting force is led to the outer side end of the pressure measuring end joint, so that the situation that the bottom conical face of the pressure measuring end joint made of a softer material in the mounting hole is damaged by overhigh pressure is avoided.
Description
Technical Field
The invention relates to the technical field of high-pressure oil rails, in particular to a connecting and sealing assembly for helium sealing test of a high-pressure oil rail.
Background
The high-pressure oil rail is used for storing fuel oil, and simultaneously, pressure fluctuation generated by oil supply of the high-pressure pump and oil injection of the oil injector is restrained, so that the pressure stability of the system is ensured. In the use process of the high-pressure oil rail, a pressure measuring end connector needs to be screwed into one end of the high-pressure oil rail for installing a pressure measuring sensor and ensuring the sealing performance of the high-pressure oil rail in use.
In order to meet the national emission requirement of fuel automobiles, the working pressure of an engine fuel system is increased to 350bar from 250bar, and if the helium sealing test scheme of an oil rail is in accordance with the sealing scheme of the prior pure stainless steel material oil rail (as shown in figure 1), the sealing surface for installing a pressure sensor in a pressure measuring end joint is damaged, so that oil leakage is caused.
The original oil rail with the working pressure of 250bar is made of stainless steel materials, the stainless steel materials are hard and have good strength, 4 nozzle holes and oil inlet joints are sealed, and a pressure measuring joint can be directly sealed on a conical sealing surface. The 350bar oil rail is manufactured by forging blanks through machining, belongs to an oil rail with an integral structure, only one part of a pressure measuring end connector needs to be assembled, the 350bar pressure measuring end connector is made of alloy copper and is made of a material softer than stainless steel, the working pressure is increased from 250bar to 350bar, and the pressure born by the same sealing surface is 40% higher than that born by the same sealing surface in a sealing test. If the sealing conical surface of the copper joint is also used as the sealing surface for the helium test, the sealing conical surface can be damaged when 350bar pressure acts on the sealing conical surface of the copper joint, and the high-pressure sensor cannot be sealed when being installed in use, so that leakage is caused.
Disclosure of Invention
The invention aims to solve the problems and provide a connecting and sealing assembly for a high-pressure oil rail helium sealing test.
The purpose of the invention is realized by the following technical scheme:
the utility model provides a connect seal assembly for high-pressure oil rail helium seals test installs at high-pressure oil rail tip, includes the pressure measurement end joint, pressure measurement end joint seal installation in the one end of high-pressure oil rail, be equipped with the air vent in the middle of the pressure measurement end joint, the pressure measurement end joint outside the centre be equipped with the communicating mounting hole of air vent, be equipped with in the mounting hole with its sealed airtight end cap, airtight end cap is big end face structure, and its inboard terminal surface is the plain end face, airtight end cap's medial surface with the outside terminal surface of pressure measurement end joint is sealed mutually.
According to the invention, the structure of the airtight plug is changed into a large-end-face structure, the original bottom in the mounting hole is used as a sealing face, the inner side end face of the airtight plug and the outer side end face of the pressure measuring end joint are used as sealing faces, and acting force is led to the outer side end of the pressure measuring end joint, so that the situation that the bottom conical face of the pressure measuring end joint made of a softer material in the mounting hole is damaged by overhigh pressure is avoided.
According to a preferable technical scheme, the airtight plug comprises a thick external plug body and a thin connecting section, and the airtight plug is installed in the installation hole of the pressure measuring end connector through the connecting section.
Preferably, the connecting section is screwed in the mounting hole through threads, and the length of the connecting section is shorter than the depth of the mounting hole in the pressure measuring end joint.
As the optimized technical scheme, a sealing ring is arranged between the airtight plug and the pressure measuring end connector, and the sealing ring can be a large-diameter sealing ring due to the large area of a large head plane at the inner side end of the airtight plug, bears the same sealing pressure and is not easy to deform under stress. In addition, the design has a large testing range, and can also be tested for the leakage between the large plane of the copper joint and the thread.
According to the preferable technical scheme, a sealing ring installation groove is formed in the joint of the inner end face of the outer plug body and the connecting section of the airtight plug, and the sealing ring is installed in the sealing ring installation groove.
As a preferable technical scheme, the size of the external plug body of the airtight plug is equivalent to that of the pressure measuring end connector.
As a preferred technical scheme, the pressure measuring end joint is made of alloy copper or copper materials.
As a preferable technical scheme, the pressure measuring end joint is screwed in the pressure measuring cavity through threads.
As a preferred technical scheme, the bottom of the mounting hole of the pressure measuring end joint is a conical surface and is used for mounting a pressure measuring sensor when in use.
The airtight plug is of a large-end-face structure, the inner end face of the airtight plug is a flat end face, the airtight plug is installed on the pressure measuring end joint through the installation hole, the inner end face of the airtight plug and the outer end face of the pressure measuring end joint are used as sealing faces to serve as sealing end faces, a sealing ring for sealing is arranged between the airtight plug and the pressure measuring end joint, the original bottom conical face in the installation hole is used as a sealing face and is not sealed, and therefore acting force is led to the outer end of the pressure measuring end joint during high-pressure testing, damage of the overhigh pressure to the bottom conical face of the pressure measuring end joint made of a softer material in the installation hole is avoided, and the conical face used during assembly of a pressure.
Compared with the prior art, the invention has the following advantages:
1. the application range is wider: the design can be used for the sealing test of the high-pressure oil rail which is higher in pressure and softer in material;
2. the operability is strong: because the large head plane has large area, the sealing ring can be a large-diameter sealing ring, bears the same sealing pressure, and is not easy to deform under stress;
3. the design test range is large, and the leakage between the large plane of the copper joint and the thread can be tested.
Drawings
FIG. 1 is a schematic structural view of a conventional oil rail seal test connection seal assembly;
FIG. 2 is a schematic view of the joint seal assembly of the present invention installed on a fuel rail;
FIG. 3 is a schematic view of the construction of the joint seal assembly of the present invention;
fig. 4 is a schematic structural view of the airtight plug of the present invention.
In the figure: 1-pressure measuring end joint; 101-a vent hole; 102-mounting holes; 2-airtight plug; 3-an oil rail; 4-sealing ring; 5-sealing the conical surface; 2' -existing airtight plugs.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
Examples
The existing oil rail helium sealing test scheme is shown in figure 1, a conical airtight plug 2' is adopted to be installed in a pressure measuring end connector 1 on an oil rail 3, the test pressure is 250bar, the material is stainless steel, the stainless steel is hard, the strength is good, 4 nozzle holes and an oil inlet connector are sealed, and the pressure measuring connector can be directly a sealing surface on a drawing. However, for the 350bar oil rail, the forged blank is manufactured by machining, only one part of the pressure measuring terminal joint needs to be assembled, the 350bar pressure measuring terminal joint is made of copper alloy and is softer than stainless steel, the working pressure is increased from 250bar to 350bar, and the pressure born by the same sealing surface during sealing test is 40% higher than that of the prior sealing surface. If the sealing conical surface of the copper joint is used as a sealing surface for the helium test, the sealing conical surface can be damaged when 350bar pressure acts on the sealing conical surface of the copper joint, and the high-pressure sensor cannot be sealed when being installed in use, so that gasoline leakage is caused.
In order to solve the problem, the invention provides a connecting and sealing assembly for a high-pressure oil rail helium sealing test.
As shown in fig. 3, the pressure measuring device is installed in a pressure measuring cavity at the end of a high-pressure oil rail 3, as shown in the left end of fig. 2, the pressure measuring device comprises a pressure measuring end connector 1 and an airtight plug 2, the pressure measuring end connector 1 is screwed and sealed in the pressure measuring cavity of the high-pressure oil rail 3 through threads, an air vent 101 is arranged in the middle of the pressure measuring end connector 1, an installation hole 102 communicated with the air vent 101 is formed in the middle of the outer portion of the pressure measuring end connector 1, when the pressure measuring device is used, the installation hole 102 is used for installing a pressure measuring sensor, and a sealing conical surface 5 is.
When the air tightness test is performed, the air-tight plug 2 is installed in the installation hole 102, as shown in fig. 4, the air-tight plug 2 includes a thick external plug body and a thin connection section, the air-tight plug 2 is screwed into the installation hole 102 of the pressure measuring end connector 1 through the connection section, both the inner and outer end faces of the external plug body are flat end faces, the length of the connection section is shorter than the depth of the installation hole 102, and the sealing conical surface 5 is ensured to be a cavity.
In addition, the size of the external plug body of the airtight plug 2 is equivalent to that of the pressure measuring end joint 1, and the pressure measuring end joint 1 is made of alloy copper or copper materials. In order to increase the sealing effect, be equipped with sealing washer 4 between airtight end cap 2 and the pressure measurement end connector 1, airtight end cap 2 is equipped with sealing washer 4 mounting groove in the junction of the inside terminal surface of outside end cap body and linkage segment, and sealing washer 4 is installed in sealing washer 4 mounting groove. Because the area of the large-end plane of the airtight plug 2 is large, the sealing ring 4 can be a large-diameter sealing ring 4, the same sealing pressure is borne, and the airtight plug is stressed and not easy to deform. In addition, the design has a large testing range, and can also be tested for the leakage between the large plane of the copper joint and the thread. The airtight plug 2 is of a large-end-face structure, the inner end face of the airtight plug is a flat end face, the airtight plug 2 is installed in the pressure measuring end joint 1 through the installation hole 102, the inner end face of the airtight plug 2 and the outer end face of the pressure measuring end joint 1 are used as sealing end faces, a sealing ring 4 for sealing is arranged between the airtight plug and the pressure measuring end joint, the bottom conical face in the installation hole is used as a sealing face and is not sealed, and therefore acting force is led to the outer end of the pressure measuring end joint during high-pressure testing, damage of the overhigh pressure to the bottom conical face of the pressure measuring end joint made of a softer material in the installation hole is avoided, and the sealing conical face 5 used during assembly of a pressure sensor is effectively protected.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (9)
1. A connecting and sealing assembly for a helium sealing test of a high-pressure oil rail is arranged at the end part of the high-pressure oil rail and comprises a pressure measuring end joint, wherein the pressure measuring end joint is arranged at one end of the high-pressure oil rail in a sealing way, a vent hole is arranged in the middle of the pressure measuring end joint, and a mounting hole communicated with the vent hole is arranged in the middle of the outer part of the pressure measuring end joint,
an airtight plug for sealing the installation hole is arranged in the installation hole, the airtight plug is of a large-head end face structure, the inner end face of the airtight plug is a flat end face, and the inner end face of the airtight plug is sealed with the outer end face of the pressure measuring end joint.
2. The joint seal assembly for the high pressure oil rail helium sealing test of claim 1, wherein the airtight bulkhead comprises a thick outer bulkhead body and a thin connecting section, and the airtight bulkhead is installed in the installation hole of the pressure measuring end connector through the connecting section.
3. The joint seal assembly for a high pressure rail helium seal test of claim 2, wherein the connecting section is threaded into the mounting hole, the connecting section having a length shorter than the depth of the mounting hole in the pressure tap fitting.
4. The connecting and sealing assembly for the high-pressure oil rail helium sealing test as claimed in claim 2, wherein a sealing ring is arranged between the airtight plug and the pressure measuring end connector.
5. The joint sealing assembly for the helium sealing test of the high-pressure oil rail according to claim 4, wherein the airtight plug is provided with a sealing ring installation groove at the joint of the inner end surface of the outer plug body and the connecting section, and the sealing ring is installed in the sealing ring installation groove.
6. The joint seal assembly for the high pressure rail helium seal test of claim 4, wherein the size of the plug body outside the hermetic plug is comparable to the size of the pressure end fitting.
7. The joint seal assembly for the high pressure oil rail helium seal test of claim 1, wherein the pressure measurement end fitting is a pressure measurement end fitting made of copper alloy or copper material.
8. The joint seal assembly for high pressure rail helium seal testing of claim 1, wherein the pressure tap is threaded into the pressure chamber.
9. The joint seal assembly for a high pressure fuel rail helium seal test of claim 1, wherein the bottom of the mounting hole of the pressure measuring end fitting is tapered for mounting a pressure measuring sensor during use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011048425.1A CN112178349A (en) | 2020-09-29 | 2020-09-29 | A connect seal assembly for high pressure oil rail helium seals test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011048425.1A CN112178349A (en) | 2020-09-29 | 2020-09-29 | A connect seal assembly for high pressure oil rail helium seals test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112178349A true CN112178349A (en) | 2021-01-05 |
Family
ID=73946424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011048425.1A Pending CN112178349A (en) | 2020-09-29 | 2020-09-29 | A connect seal assembly for high pressure oil rail helium seals test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112178349A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204142457U (en) * | 2014-10-31 | 2015-02-04 | 苏州道森钻采设备股份有限公司 | Value pressure test is released joint frock |
| CN205226711U (en) * | 2015-10-30 | 2016-05-11 | 上海新莲泵阀有限公司 | Corrosion resistant high -pressure quick -operation joint |
| CN205691303U (en) * | 2016-01-08 | 2016-11-16 | 成都信息工程大学 | Pressure test device |
| CN207280690U (en) * | 2017-10-26 | 2018-04-27 | 大同新成新材料股份有限公司 | A kind of gas nozzle plug of the airtight test of carbon slipper |
| CN110306962A (en) * | 2019-06-25 | 2019-10-08 | 苏州道森钻采设备股份有限公司 | Fracturing unit super-pressure pressure relief device |
| CN212273412U (en) * | 2020-09-29 | 2021-01-01 | 上海众源燃油分配器制造有限公司 | A connect seal assembly for high pressure oil rail helium seals test |
-
2020
- 2020-09-29 CN CN202011048425.1A patent/CN112178349A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204142457U (en) * | 2014-10-31 | 2015-02-04 | 苏州道森钻采设备股份有限公司 | Value pressure test is released joint frock |
| CN205226711U (en) * | 2015-10-30 | 2016-05-11 | 上海新莲泵阀有限公司 | Corrosion resistant high -pressure quick -operation joint |
| CN205691303U (en) * | 2016-01-08 | 2016-11-16 | 成都信息工程大学 | Pressure test device |
| CN207280690U (en) * | 2017-10-26 | 2018-04-27 | 大同新成新材料股份有限公司 | A kind of gas nozzle plug of the airtight test of carbon slipper |
| CN110306962A (en) * | 2019-06-25 | 2019-10-08 | 苏州道森钻采设备股份有限公司 | Fracturing unit super-pressure pressure relief device |
| CN212273412U (en) * | 2020-09-29 | 2021-01-01 | 上海众源燃油分配器制造有限公司 | A connect seal assembly for high pressure oil rail helium seals test |
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