CN112555549A - High-tightness connecting device for ventilating hard tube - Google Patents
High-tightness connecting device for ventilating hard tube Download PDFInfo
- Publication number
- CN112555549A CN112555549A CN202011496687.4A CN202011496687A CN112555549A CN 112555549 A CN112555549 A CN 112555549A CN 202011496687 A CN202011496687 A CN 202011496687A CN 112555549 A CN112555549 A CN 112555549A
- Authority
- CN
- China
- Prior art keywords
- base
- hard tube
- connecting device
- snap ring
- joint
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- 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
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Classifications
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- 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
- F16L41/00—Branching pipes; Joining pipes to walls
- F16L41/08—Joining pipes to walls or pipes, the joined pipe axis being perpendicular to the plane of the wall or to the axis of another pipe
- F16L41/086—Joining pipes to walls or pipes, the joined pipe axis being perpendicular to the plane of the wall or to the axis of another pipe fixed with screws
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Exhaust Silencers (AREA)
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
Abstract
The invention relates to the technical field of automobile exhaust systems, and discloses a high-tightness connecting device for a ventilating hard pipe, which solves the technical problems existing in the existing connecting mode of flanging the ventilating hard pipe and matching with a set of external nut. According to the technical scheme, the external nut and the inner part of the base are designed to be inclined planes, and the clamping ring can be pressed to play a role in interference fit so as to achieve the purposes of simplified process, reduced cost and good sealing property.
Description
Technical Field
The invention relates to the technical field of automobile exhaust systems, in particular to a high-tightness connecting device for a ventilating hard pipe.
Background
The particle trap of the automobile exhaust system needs to be additionally provided with a pressure difference detection component, along with the stricter and stricter emission regulations, the requirement on the sealing performance of the exhaust system is higher, and the poor sealing fault can seriously affect the vehicle emission performance and pollute the environment.
In the existing industry, a pressure difference monitoring component usually adopts a ventilation hard pipe as a flow guide pipe to be connected with a sensor for pressure monitoring, in the industry, in order to ensure the sealing property, the ventilation hard pipe is flanged in an expanding way and matched with a set of external nut, the external nut is rotated to directly act on the expansion position with axial force, and the ventilation hard pipe is tightly pressed in a joint by utilizing the expansion pipe. This not only increases the difficulty of the process, but also reduces the strength of the vented rigid pipe.
However, the prior art has the technical problems that the ventilation hard pipe needs to be expanded and flanged, special equipment for expanding and flanging is needed, the process is complex, and the cost is high; the outer nut needs to bear larger axial force, so that the strength is required to be selected to be higher, and the cost is high; the surface burr or poor flatness of the expanded pipe of the hard pipe easily causes the air leakage of the joint surface and has poor sealing property.
Disclosure of Invention
Aiming at the technical problems of the connection mode of flanging the expanding pipe of the ventilating hard pipe and matching with a set of external nut in the background technology, the invention utilizes the design of the internal inclined surface of the external nut and the base, and can play a role of interference fit when pressing the snap ring, thereby achieving the purposes of simplified process, reduced cost and good sealing property.
In order to achieve the purpose, the invention provides the following technical scheme:
a high-tightness connecting device of a ventilation hard tube comprises a processing shell and the ventilation hard tube, wherein the processing shell is provided with a ventilation port, a base is arranged on the air vent, one end of the base is hermetically welded with the processing shell, the other end of the base is used for being connected with the ventilation hard pipe in an inserting way, external threads are arranged on the periphery side of the base, the inner side wall of the base is provided with a mounting opening, a fastening snap ring is clamped in the mounting opening, the external thread of the base is connected with an external nut joint, the inner parts of the base and the outer nut joint are inclined planes, the outer nut joint is rotated by force, the outer nut joint transmits acting force to the fastening snap ring, the axial acting force of the fastening clamping ring clamps the fastening clamping ring and the base through interference fit, and the radial acting force of the fastening clamping ring tightly clamps the ventilation hard tube in the outer nut joint.
Through the technical scheme, the ventilation hard pipe does not need to be flanged in an expanding way, can be in a straight pipe form, does not need a nut with higher strength, and is simple in installation process and low in cost; secondly, the fastening snap ring is of an oval structure; the external nut and the base are designed to be inclined planes, interference fit can be achieved when the clamping ring is compressed, and reliability and sealing performance are better.
The invention is further configured to: the processing shell is a shell of a post-processing converter of the diesel vehicle.
The invention is further configured to: the ventilation hard pipe is a stainless steel metal pipe.
The invention is further configured to: the base is provided with a butt joint platform, and the butt joint platform is abutted to the outer surface of the processing shell.
The invention is further configured to: the fastening snap ring is a metal snap ring.
The invention is further configured to: the peripheral sides of the outer nut joints are hexagonal prism nut structures, so that the outer nut joints can be conveniently screwed by a wrench.
In conclusion, the invention has the following beneficial effects:
(1) the ventilation hard pipe does not need to be expanded and flanged, can be in a straight pipe form, does not need a nut with higher strength, and has simple installation process and low cost;
(2) the fastening snap ring is of an oval structure, so that the sealing performance is better;
(3) the external nut and the base are designed to be inclined planes, so that the clamping ring can be pressed to achieve an interference fit effect, and the reliability and the sealing performance are better.
Drawings
FIG. 1 is a front view of the connection device;
FIG. 2 is a side view of the connection device;
FIG. 3 is a full cross-sectional view of the coupling device taken along the line A-A in FIG. 2;
fig. 4 is a schematic view of a portion of the structure of fig. 3.
Reference numerals: 1. processing the shell; 11. a vent; 2. a ventilation hard tube; 3. a base; 31. an external thread; 32. an installation port; 33. a butting table; 4. fastening the snap ring; 5. an external nut joint.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited to these examples.
A high-tightness connecting device for a ventilating hard tube is shown in combined figures 1-4 and comprises a processing shell 1 and a ventilating hard tube 2, wherein a ventilating hole 11 is formed in the processing shell 1, a base 3 is installed on the ventilating hole 11, one end of the base 3 is hermetically welded with the processing shell 1, the other end of the base 3 is used for being connected with the ventilating hard tube 2 in an inserting mode, external threads 31 are arranged on the outer peripheral side of the base 3, an installation opening 32 is formed in the inner side wall of the base 3, a fastening clamping ring 4 is clamped in the installation opening 32, an external nut joint 5 is connected to the external threads 31 of the base 3, the inner portions of the base 3 and the external nut joint 5 are inclined planes, the external nut joint 5 is rotated forcibly, acting force is transmitted to the fastening clamping ring 4 through the external nut joint 5, the fastening ring 4 and the base 3 are clamped through interference fit through axial acting force of the fastening ring 4, and the ventilating hard tube 2.
Specifically, the treatment housing 1 is a diesel vehicle aftertreatment converter housing. The aeration hard pipe 2 is a stainless steel metal pipe. The base 3 is provided with a contact table 33, and the contact table 33 is in contact with the outer surface of the process case 1. The fastening snap ring 4 is a metal snap ring. The peripheral side of the outer nut joint 5 is of a hexagonal nut structure, so that the nut is convenient to screw by a spanner.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (6)
1. The utility model provides a high leakproofness connecting device of hard tube ventilates, includes and handles casing (1) and ventilate hard tube (2), handle and seted up blow vent (11) on casing (1), its characterized in that: install base (3) on blow vent (11), the one end of base (3) with handle casing (1) seal weld, the other end of base (3) be used for with the hard tube (2) plug-in connection ventilates, the periphery side of base (3) is equipped with external screw thread (31), the inside wall of base (3) is equipped with installing port (32), installing port (32) inside callipers is equipped with fastening snap ring (4), be connected with outer nut joint (5) on external screw thread (31) of base (3), base (3) and outer nut joint (5) are inside to be the inclined plane, rotate hard outer nut joint (5), outer nut joint (5) transmit the effort to on fastening snap ring (4), the axial effort of fastening snap ring (4) passes through interference fit chucking with fastening snap ring (4) and base (3), the radial acting force of the fastening snap ring (4) tightly clamps the ventilation hard pipe (2) in the external nut joint (5).
2. The high-tightness connecting device for the air-breathing hard tube as claimed in claim 1, wherein: the treatment shell (1) is a diesel vehicle aftertreatment converter shell.
3. The high-tightness connecting device for the air-breathing hard tube as claimed in claim 1, wherein: the ventilation hard pipe (2) is a stainless steel metal pipe.
4. The high-tightness connecting device for the air-breathing hard tube as claimed in claim 1, wherein: the base (3) is provided with a butt joint table (33), and the butt joint table (33) is abutted to the outer surface of the processing shell (1).
5. The high-tightness connecting device for the air-breathing hard tube as claimed in claim 1, wherein: the fastening snap ring (4) is a metal snap ring.
6. The high-tightness connecting device for the air-breathing hard tube as claimed in claim 1, wherein: the peripheral side of the outer nut joint (5) is of a hexagonal prism nut structure, so that the outer nut joint can be conveniently screwed by a wrench.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011496687.4A CN112555549A (en) | 2020-12-17 | 2020-12-17 | High-tightness connecting device for ventilating hard tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011496687.4A CN112555549A (en) | 2020-12-17 | 2020-12-17 | High-tightness connecting device for ventilating hard tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112555549A true CN112555549A (en) | 2021-03-26 |
Family
ID=75062974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011496687.4A Pending CN112555549A (en) | 2020-12-17 | 2020-12-17 | High-tightness connecting device for ventilating hard tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112555549A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010009333A1 (en) * | 2000-01-24 | 2001-07-26 | Sandor Palvoelgyi | Arrangement for connecting two pipes |
| US20130147189A1 (en) * | 2011-11-02 | 2013-06-13 | Tylok International, Inc. | Face seal conduit fitting including subassembly |
| CN205013906U (en) * | 2015-10-08 | 2016-02-03 | 南京依柯卡特汽车催化器有限公司 | Better straight tube attach fitting of leakproofness |
| CN109357098A (en) * | 2018-11-30 | 2019-02-19 | 常州常发制冷科技有限公司 | Insert seal pipe fitting and its installation method |
| CN111022799A (en) * | 2020-01-06 | 2020-04-17 | 上海未蓝工业技术有限公司 | Steel pipe snap ring joint |
| CN211118176U (en) * | 2019-09-30 | 2020-07-28 | 广州汽车集团股份有限公司 | Brake hard tube plug and have its car |
-
2020
- 2020-12-17 CN CN202011496687.4A patent/CN112555549A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010009333A1 (en) * | 2000-01-24 | 2001-07-26 | Sandor Palvoelgyi | Arrangement for connecting two pipes |
| US20130147189A1 (en) * | 2011-11-02 | 2013-06-13 | Tylok International, Inc. | Face seal conduit fitting including subassembly |
| CN205013906U (en) * | 2015-10-08 | 2016-02-03 | 南京依柯卡特汽车催化器有限公司 | Better straight tube attach fitting of leakproofness |
| CN109357098A (en) * | 2018-11-30 | 2019-02-19 | 常州常发制冷科技有限公司 | Insert seal pipe fitting and its installation method |
| CN211118176U (en) * | 2019-09-30 | 2020-07-28 | 广州汽车集团股份有限公司 | Brake hard tube plug and have its car |
| CN111022799A (en) * | 2020-01-06 | 2020-04-17 | 上海未蓝工业技术有限公司 | Steel pipe snap ring joint |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210326 |