CN211059571U - Three-way pipe connecting structure used in EGR pipeline - Google Patents
Three-way pipe connecting structure used in EGR pipeline Download PDFInfo
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- CN211059571U CN211059571U CN201921339058.3U CN201921339058U CN211059571U CN 211059571 U CN211059571 U CN 211059571U CN 201921339058 U CN201921339058 U CN 201921339058U CN 211059571 U CN211059571 U CN 211059571U
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Abstract
The utility model discloses a three-way pipe connection structure that uses in EGR pipeline belongs to the connecting piece field, including the three-way pipe body, be equipped with double-deck flange on the three-way pipe body, double-deck flange include with this body coupling of three-way pipe the upper plate below is equipped with and is used for cliping the lower plywood of waiting to adorn the flange with the upper plate together, the outer edge of upper plate and lower plywood is equipped with the splice bar that is used for connecting, through double-deck flange connects, connects more reliably, simple to operate to can install in advance, solved prior art, three-way pipe installation is inconvenient, insecure problem in the EGR pipeline.
Description
Technical Field
The utility model relates to a connecting piece especially relates to a three-way pipe connection structure that uses in EGR pipeline.
Background
Energy conservation and emission reduction become common subjects of the automobile industry in the world, and how to effectively reduce the emission of engine tail gas and improve the utilization efficiency of fuel oil becomes a subject and challenge to be faced by the industry.
After the automobile burns, substances such as N, S in gasoline can be burnt to generate NOx and SOx, and by adopting EGR, the proportion of inert gases such as CO2 in combustible mixed gas in a cylinder is increased, so that the combustion speed is reduced, and meanwhile, the specific heat capacity of the mixed gas is increased, so that the maximum combustion temperature is reduced; since high temperature and oxygen enrichment are conditions for generating NOx, and are not indispensable, the generation of NOx is suppressed after lowering the combustion temperature.
The EGR of the engine has the function of reintroducing exhaust gas exhausted by the engine into an air intake system, and the exhaust gas enters a cylinder along with fresh air mixture to participate in the combustion process again. Therefore, in the development process of engine emission reduction design, the design and performance research of the EGR is one of the most important links.
Because automobile engine's vibrations, fatigue takes place easily in EGR pipeline junction, produces the danger of gas leakage, and the three-way pipe in the EGR pipeline is the important subassembly of deciding pipeline direction and overall layout, and whether its is fixed reliable and stable has decided whether stable safety of whole pipeline.
For example, the three-way valve for D-EGR system and the vehicle disclosed in chinese patent document, whose publication number is CN201610486191.6, includes an air intake hole, a first exhaust hole and a second exhaust hole, has disadvantages that the sealing performance is poor, the installation is unstable, the screw connection is easily fatigued by the vibration of the vehicle, and the flange is installed by screwing the nut with the opening plate, the installation is inconvenient in the narrow space of the vehicle engine, and the pre-installation cannot be effectively performed.
SUMMERY OF THE UTILITY MODEL
The utility model relates to an overcome prior art, the three-way pipe in the car EGR pipeline is fixed unreliable, the junction takes place fatigue easily, provides a three-way pipe connection structure who uses in the EGR pipeline, and the installation is firm, the junction is difficult for taking place fatigue to simple to operate, before the whole position of EGR pipeline is confirmed, can install in advance.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model relates to a three-way pipe connecting structure used in an EGR pipeline, which comprises a three-way pipe body, wherein the three-way pipe body is provided with an air inlet, an air outlet and a detection port for installing a temperature sensor, the air outlet is connected with an air outlet pipe, the air outlet pipe is inserted in the air outlet pipe, an air outlet pipe flange is arranged on the air outlet pipe, a double-layer flange is arranged on the outer side surface of the air outlet, the double-layer flange comprises an upper flange plate connected with the outer side surface of the air outlet, a lower flange plate used for clamping the air outlet pipe flange together with the upper flange plate is arranged below the upper flange plate, the outer edges of the upper flange plate and the lower flange plate are provided with connecting ribs used for connecting the upper flange plate and the lower flange plate, the lower side surface of the upper flange plate is attached with the upper side surface of the air outlet pipe, the upper flange plate, the connecting ribs and the lower flange plate are integrally formed.
Through double-deck flange is connected, connects more reliably, when the EGR pipeline is installed, because whole pipeline is complicated, has many places to fix, if in proper order in each junction directly with the screw tightening connection, can lead to several position installation to accomplish the back, remaining mounted position takes place the dislocation, unable installation, consequently need to install in advance some mounted positions, and clip the flange of outlet duct through double-deck flange, can make and install in advance more reliably, prevent that the three-way pipe from droing from the outlet duct, dodging the mouth and can letting out the laminating of upper flank and upper flange board downside of trachea flange, can install in advance with rotatory three-way pipe of hand after the laminating, need not use tools, and is very convenient.
Preferably, the upper flange plate is provided with a screw hole for mounting a screw, the lower flange plate is provided with a nut groove, the nut groove is internally and adaptively mounted with an anti-rotation nut, the screw passes through the screw hole and is screwed on the anti-rotation nut, when a common flange is connected, force is applied to the nut and the screw at the same time, if the screw is screwed, the nut can rotate along with the screw, and the fastening effect cannot be achieved, and when the double-layer flange and the vent pipe flange are mounted, the screw only needs to be screwed, and the anti-rotation nut is restrained by the nut groove and cannot be rotated by a large margin, so that the mounting can be directly completed, and in the narrow space of an automobile engine, the mounting difficulty can be greatly reduced by the structure.
Preferably, the upper side surface of the square nut is provided with an elastic gasket, when an automobile vibrates, the screw at the joint is subjected to alternating stress, the elastic gasket can share the alternating force, the stress on the thread is reduced, and therefore the service life of the thread at the joint is greatly prolonged.
Preferably, the upper flange plate, the lower flange plate and the air outlet pipe flange are waist-shaped and have the same width, after the air outlet pipe flange is clamped in the double-layer flange, the side edges of the air outlet pipe flange are aligned with the side edges of the upper flange plate and the lower flange plate through rotation, the screw holes in the double-layer flange are aligned with the screw holes in the air outlet pipe flange, the observation angle does not need to be adjusted to find the positions of the screw holes, and the installation is more convenient in a narrow space of an engine.
Preferably, a sealing ring for sealing is installed between the outer side face of the bottom of the air outlet and the inner side face of the air outlet pipe, and the sealing piece can prevent gas leakage and danger due to the fact that high-temperature gas is conveyed inside the EGR pipeline and air pressure is high.
Preferably, the inner diameter of the outer side of the air inlet is larger than that of the inner side of the air inlet, a sealing step is formed between the larger inner diameter and the smaller inner diameter, and the sealing step can block a gap between the air inlet and the air inlet pipe, so that the sealing performance of the pipeline is improved, and air leakage is prevented.
Preferably, the flange and the three-way pipe body are integrally formed, the flange does not need to be welded to the three-way pipe, and cost is reduced.
Therefore, the utility model discloses following beneficial effect has: (1) the three-way pipe can be pre-installed before the position of the whole pipeline is fixed, so that the installation is reliable; (2) the alternating stress on the screw for connection on the flange is reduced, so that the service life of the screw is prolonged; (3) only need twist the screw during installation, need not to use instrument fixation nut, simple to operate (4) leakproofness is good, is difficult for taking place to leak.
Drawings
Fig. 1 is a front sectional view of the present invention.
Fig. 2 is a left side sectional view of the present invention.
Fig. 3 is a top view of the present invention.
In the figure: 1. the three-way pipe comprises a three-way pipe body 11, an air inlet 12, an air outlet 13, a detection port 14, a sealing piece 15, a sealing step 2, a double-layer flange 21, an upper flange plate 22, a lower flange plate 23, a connecting rib 24, an avoiding port 25, a nut groove 26, a square nut 27, an elastic gasket 3, an air outlet pipe 31 and an air outlet pipe flange.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description.
In the embodiment shown in fig. 1-3, the three-way pipe comprises a three-way pipe body 1, the three-way pipe body comprises an air inlet 11, an air outlet 12 and a detection port 13 for mounting a temperature sensor, the air outlet is connected with an air outlet pipe 3 and inserted into the air outlet pipe, an air outlet pipe flange 31 is arranged on the air outlet pipe, a double-layer flange 2 is arranged on the outer side surface of the air outlet, the double-layer flange comprises an upper flange plate 21 connected with the outer side surface of the air outlet, a lower flange plate 22 for clamping the air outlet pipe flange together with the upper flange plate is arranged below the upper flange plate, connecting ribs 23 for connecting the upper flange plate and the lower flange plate are arranged on the outer edges of the upper flange plate and the lower flange plate, the lower side surface of the upper flange plate is attached to the upper side surface of the air outlet pipe flange, and an avoiding port, the upper flange plate, the connecting rib and the lower flange plate are integrally formed, the height of the connecting rib is the same as the thickness of the air outlet pipe flange, the included angle between the air inlet and the air outlet is 95 degrees, and the included angle between the air outlet and the detection port is 110 degrees; a nut groove 25 is formed in the lower flange plate, an anti-rotation nut 26 is installed in the nut groove, the size of the nut groove is slightly larger than that of the anti-rotation nut, the anti-rotation nut is cuboid in shape, a threaded hole is formed in the anti-rotation nut, and the threaded hole is aligned with the threaded hole in the upper flange plate; the anti-rotation nut cannot rotate greatly in the nut groove; an elastic gasket 27 is arranged on the upper side surface of the anti-rotation nut, is a rubber pad and is attached to the upper side surface of the anti-rotation nut; the upper flange plate, the lower flange plate and the air outlet pipe flange are waist-shaped in appearance and have the same width, and the width of the avoidance port is larger than that of the air outlet pipe flange; a sealing ring 14 for sealing is arranged between the outer side surface of the bottom of the air outlet and the inner side surface of the air outlet pipe, and a sealing ring groove for sleeving the sealing ring is formed in the outer side surface of the air outlet; the inner diameter of one side, close to the outside, of the air inlet is larger than that of one side, close to the inside, of the air inlet, a sealing step 15 is formed between the positions, with the larger inner diameter, and the positions, close to the smaller inner diameter, of the air inlet, internal threads are arranged on one side, close to the outside, of the air inlet, and the air inlet is in threaded connection; the double-layer flange and the three-way pipe body are integrally formed, and an upper flange plate of the double-layer flange is arranged on the air outlet.
When the three-way pipe is installed, the air outlet is firstly plugged into the air outlet pipe, the sealing element outside the air outlet is propped against the inner side of the air outlet pipe to play a sealing role, the upper side face of the air outlet pipe flange is contacted with the lower side face of the upper layer of the double-layer flange, the three-way pipe is rotated to enable the air outlet pipe flange to enter between the upper layer and the lower layer of the double-layer flange along the inner side of the connecting rib, the side edge of the double-layer flange is aligned with the side edge of the air outlet pipe flange, at the moment, the screw hole on the upper flange plate, the screw hole on the air outlet pipe flange and the screw hole of the square nut are aligned up and down, the screw is screwed on the screw hole of the anti-rotation nut after penetrating through the screw holes of the upper flange plate and the air outlet pipe flange, because the position of the anti, during vibration, the elastic gasket can reduce alternating stress on the thread, so that the service life of the thread is prolonged.
Claims (7)
1. A three-way pipe connecting structure used in an EGR pipeline comprises a three-way pipe body (1), wherein an air inlet (11), an air outlet (12) and a detection port (13) used for installing a temperature sensor are arranged on the three-way pipe body, an air outlet pipe (3) is connected to the air outlet, the three-way pipe is characterized in that the air outlet is inserted into the air outlet pipe, an air outlet pipe flange (31) is arranged on the air outlet pipe, a double-layer flange (2) is arranged on the outer side surface of the air outlet, the double-layer flange comprises an upper flange plate (21) connected with the outer side surface of the air outlet, a lower flange plate (22) used for clamping the air outlet pipe flange together with the upper flange plate is arranged below the upper flange plate, connecting ribs (23) used for connecting the upper flange plate and the lower flange plate are arranged on the outer edges of the upper flange plate and, the lower flange plate is provided with an avoiding opening (24) for avoiding the flange of the air outlet pipe, and the upper flange plate, the connecting rib and the lower flange plate are integrally formed.
2. The three-way pipe connecting structure for the EGR pipeline according to claim 1, wherein the upper flange plate is provided with a screw hole for mounting a screw, the lower flange plate is provided with a nut groove (25), an anti-rotation nut (26) is fittingly mounted in the nut groove, and the screw passes through the screw hole and is screwed on the anti-rotation nut.
3. The tee coupling structure for use in an EGR pipe as claimed in claim 2, wherein an elastic washer (27) is installed on an upper side of the rotation-preventing nut.
4. The three-way pipe connecting structure for an EGR pipeline as claimed in claim 1, wherein the upper flange plate, the lower flange plate, and the outlet pipe flange are oval in shape and have the same width.
5. The three-way pipe connecting structure used in an EGR pipeline according to claim 1, wherein a sealing ring (14) for sealing is installed between the outer side surface of the bottom of the air outlet and the inner side surface of the air outlet pipe.
6. The three-way pipe connection structure for an EGR pipeline according to claim 1 or 5, wherein the inner diameter of the inlet is larger on the outer side than on the inner side, and a sealing step (15) is formed between the larger inner diameter and the smaller inner diameter.
7. The three-way pipe connecting structure for an EGR pipeline according to any one of claims 1 to 5, wherein the double-layer flange and the three-way pipe body are integrally formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921339058.3U CN211059571U (en) | 2019-08-16 | 2019-08-16 | Three-way pipe connecting structure used in EGR pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921339058.3U CN211059571U (en) | 2019-08-16 | 2019-08-16 | Three-way pipe connecting structure used in EGR pipeline |
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| Publication Number | Publication Date |
|---|---|
| CN211059571U true CN211059571U (en) | 2020-07-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921339058.3U Active CN211059571U (en) | 2019-08-16 | 2019-08-16 | Three-way pipe connecting structure used in EGR pipeline |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117072489A (en) * | 2023-10-13 | 2023-11-17 | 江苏法尔机械制造有限公司 | Improved corrosion-resistant silicon carbide ceramic pump |
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2019
- 2019-08-16 CN CN201921339058.3U patent/CN211059571U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117072489A (en) * | 2023-10-13 | 2023-11-17 | 江苏法尔机械制造有限公司 | Improved corrosion-resistant silicon carbide ceramic pump |
| CN117072489B (en) * | 2023-10-13 | 2024-03-26 | 江苏法尔机械制造有限公司 | Improved corrosion-resistant silicon carbide ceramic pump |
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