CN220929547U - Corrosion-proof plastic EGR valve - Google Patents
Corrosion-proof plastic EGR valve Download PDFInfo
- Publication number
- CN220929547U CN220929547U CN202420146615.4U CN202420146615U CN220929547U CN 220929547 U CN220929547 U CN 220929547U CN 202420146615 U CN202420146615 U CN 202420146615U CN 220929547 U CN220929547 U CN 220929547U
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- Prior art keywords
- valve body
- valve
- rotating shaft
- gear
- plastic
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- 239000004033 plastic Substances 0.000 title claims abstract description 35
- 229920003023 plastic Polymers 0.000 title claims abstract description 35
- 238000005260 corrosion Methods 0.000 claims abstract description 24
- 230000005540 biological transmission Effects 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 5
- 238000001746 injection moulding Methods 0.000 claims abstract description 5
- 239000010959 steel Substances 0.000 claims abstract description 5
- 230000008054 signal transmission Effects 0.000 claims abstract description 4
- 230000000149 penetrating effect Effects 0.000 claims abstract description 3
- 238000007789 sealing Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 claims 1
- 230000001070 adhesive effect Effects 0.000 claims 1
- 230000007797 corrosion Effects 0.000 abstract description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 abstract description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 239000007789 gas Substances 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
Landscapes
- Exhaust-Gas Circulating Devices (AREA)
Abstract
The utility model discloses an anti-corrosion plastic EGR valve, which comprises a valve body formed by injection molding of plastic materials, wherein a valve port is arranged on the valve body, and a stepped channel insert is arranged on the valve body close to the air inlet position of the valve port; a rotating shaft vertically penetrating through the valve port is arranged in the valve body flow passage; a valve plate corresponding to the valve port is arranged on the rotating shaft through a bolt assembly; the top of the valve body is provided with a sensor top cover with a sensor through a buckle, and the top of the rotating shaft is provided with magnetic steel matched with the sensor to realize signal transmission of the rotating angle of the rotating shaft; a transmission assembly for driving the rotating shaft to rotate is further arranged in the cavity at the upper part of the valve body; a blanking cover which seals the flow passage is arranged at the bottom of the valve body; the bottom of the rotating shaft is provided with a gasket and a check ring, and the top of the rotating shaft is provided with a spring connected with the transmission assembly; the valve body is made of plastic integrally, so that the problem of corrosion of water vapor, sulfide or chloride ions and the like in discharged materials to the valve seat is effectively solved.
Description
Technical Field
The utility model relates to the technical field of valves, in particular to an anti-corrosion EGR valve.
Background
An exhaust gas recirculation valve (EGR valve) is arranged between an exhaust system and an air intake system of an engine, and is used for controlling a certain amount of exhaust gas to enter a combustion chamber again through a pipeline of the EGR valve to participate in combustion, so that emission of harmful substances such as nitrogen oxides, carbon dioxide and the like is reduced, the compression ratio can be improved, knocking is prevented, and the EGR valve has a certain contribution to fuel economy.
Because the exhaust gas is exhausted from the EGR valve through the engine, the main components of the exhaust gas comprise Cl, S, N, acetic acid, nitrogen oxides and the like, carbon particles, water vapor, sulfides or chloride ions and the like in the exhaust can cause carbon deposition or corrosion to the valve, the valve rod and the valve seat in the air passage, thereby causing movement clamping stagnation or leakage of the valve and causing product failure.
Disclosure of Invention
The technical problem to be solved by the utility model is to provide the anti-corrosion plastic EGR valve, which can solve the problem that the valve seat of the EGR valve in the EGR airflow channel is easy to corrode by water vapor, sulfide or chloride ions, and improves the smoothness of the EGR valve in use.
In order to solve the technical problems, the technical scheme adopted by the utility model is as follows.
The anti-corrosion plastic EGR valve comprises a valve body which is formed by injection molding of plastic materials, wherein a valve port is arranged on the valve body, and a channel insert which is in a step shape is arranged on the valve body close to the air inlet position of the valve port; a rotating shaft vertically penetrating through the valve port is arranged in the valve body flow passage; a valve plate corresponding to the valve port is arranged on the rotating shaft through a bolt assembly; the top of the valve body is provided with a sensor top cover with a sensor through a buckle, and the top of the rotating shaft is provided with magnetic steel matched with the sensor to realize signal transmission of the rotating angle of the rotating shaft; a transmission assembly for driving the rotating shaft to rotate is further arranged in the cavity at the upper part of the valve body; a blanking cover which seals the flow passage is arranged at the bottom of the valve body; the bottom of the rotating shaft is provided with a gasket and a check ring for realizing axial positioning of the rotating shaft, and the top of the rotating shaft is provided with a spring connected with the transmission assembly; the check ring is clamped in a check ring groove at the lower part of the rotating shaft, and the gasket is arranged between the check ring and the inner wall of the flow passage of the valve body.
According to the anti-corrosion plastic EGR valve, the sealing ring with a sealing function is arranged between the valve body and the sensor top cover.
The anti-corrosion plastic EGR valve is characterized in that a needle bearing for installing a rotating shaft is arranged on the valve body; the lower part of the rotating shaft is provided with a self-lubricating shaft sleeve.
The anti-corrosion plastic EGR valve comprises a driving gear connected with an output shaft of a motor, an intermediate gear meshed with the driving gear for transmission, and a driven gear arranged on a rotating shaft; the intermediate gear is arranged on a gear shaft on the valve body, and a pinion gear meshed with the driven gear for transmission is further arranged on the gear shaft.
Above-mentioned anticorrosion plastics EGR valve, be provided with the motor thread insert that is used for installing the motor on the valve body, the outside of motor thread insert is provided with twill annular knurl and multistage recess structure that increases the screw adhesion.
According to the anti-corrosion plastic EGR valve, the portion, connected with the valve body, of the bottom of the gear shaft is provided with the groove for preventing the gear shaft from loosening and the knurling structure.
The anti-corrosion plastic EGR valve is characterized in that the valve body is also provided with a mounting hole insert for bearing axial compression force and surface friction force in the bolt locking and attaching process.
By adopting the technical scheme, the utility model has the following technical progress.
The utility model provides an anti-corrosion plastic EGR valve, wherein the whole valve body is made of plastic, so that the problem of corrosion of water vapor, sulfide or chloride ions and the like in discharged materials to a valve seat is effectively solved; meanwhile, the problems of strength and size shrinkage of plastic materials are considered, and various connecting inserts are embedded in the valve body, so that the corrosion problem of a traditional aluminum valve is solved, and the problem of insufficient service life of the plastic valve body is also solved.
Because of the hot melting property of the plastic, the valve body is connected with the insert and the valve body is connected with the blanking cover in a welding way, so that the tightness is ensured, the sealing element between parts is omitted, and the cost is reduced.
Drawings
FIG. 1 is a schematic diagram of a specific structure of the present utility model;
FIG. 2 is an axial cross-sectional view of the present utility model at the spindle;
FIG. 3 is a schematic view of a specific structure of the valve body according to the present utility model;
FIG. 4 is a schematic illustration of a specific construction of a motor screw insert according to the present utility model;
Fig. 5 is a schematic view showing a specific structure of the mounting hole insert according to the present utility model.
Wherein: 1. valve body, 2, valve port, 3, rotary shaft, 4, valve plate, 5, sensor top cover, 6, bolt assembly, 7, fastener, 8, sealing ring, 9, magnetic steel, 10, spring, 11, gasket, 12, retainer ring, 13, plug, 14, channel insert, 15, gear shaft, 16, driving gear, 17, intermediate gear, 18, driven gear, 19, needle bearing, 20, self-lubricating shaft sleeve, 21, motor thread insert, 22, mounting hole insert.
Detailed Description
The utility model will be described in further detail with reference to the drawings and the detailed description.
The anti-corrosion plastic EGR valve is shown in figures 1 to 5 and comprises a valve body 1, wherein the valve body 1 is formed by injection molding of plastic materials, a valve port 2 is arranged on the valve body 1, a rotating shaft 3 which vertically penetrates through the valve port 2 is arranged in a flow channel of the valve body 1, a valve plate 4 corresponding to the valve port 2 is arranged on the rotating shaft 3 through a bolt assembly 6, a sensor top cover 5 with a sensor is arranged on the top of the valve body 1 through a plurality of buckles 7, a transmission assembly which drives the rotating shaft 3 to rotate is further arranged in a cavity on the upper part of the valve body 1, and a blocking cover 13 is arranged at the bottom of the valve body 1.
A sealing ring 8 which plays a sealing role is also arranged between the valve body 1 and the sensor top cover 5.
The valve body 1 is provided with a needle bearing 19 for installing the rotating shaft 3, and the lower part of the rotating shaft 3 is provided with a self-lubricating shaft sleeve 20.
The top of the rotating shaft 3 is provided with magnetic steel 9 matched with a sensor, so that signal transmission of the rotating angle of the valve plate 4 can be realized, and the sensor converts the change of the magnetic field intensity into an electric signal through measuring the change of the magnetic field intensity, thereby realizing signal output.
The bottom of the rotating shaft 3 is provided with a gasket 11 and a check ring 12, the check ring 12 is clamped in a check ring groove at the lower part of the rotating shaft 3, and the gasket 11 is arranged between the check ring 12 and the inner wall of the flow passage of the valve body 1.
During the rotation process of the rotating shaft 3, the check ring 12 rubs with the end face of the gasket 11, and the friction force between the check ring and the plastic valve body 1 is relieved through the gasket 11.
The top of the rotating shaft 3 is provided with a spring 10 connected with a transmission assembly, the spring 10 is a torsion spring, and the driven gear 18 is reset through torsion force in a power-off state to drive the rotating shaft 3 to realize the closing of the valve plate 4.
The spring 10 and the retainer ring 12 cooperate to realize axial positioning of the rotating shaft 3 in the valve body, and the spring 10 realizes resetting of the driven gear 18 through torsion force.
The valve body 1 near the air inlet position of the valve port 2 is provided with a stepped channel insert 14, and the channel insert 14 is matched with the valve plate 4 to realize sealing.
The transmission assembly comprises a driving gear 16, an intermediate gear 17 and a driven gear 18, wherein the driving gear 16 is connected with an output shaft of the motor, the intermediate gear 17 is arranged on a gear shaft 15 on the valve body 1, and the driven gear 18 is arranged on the rotating shaft 3.
The driving gear 16 is meshed with the intermediate gear 17 for transmission, a pinion gear meshed with the driven gear 18 for transmission is further arranged on the gear shaft 15, the driving gear rotates through the intermediate gear 17 under the drive of the motor and transmits driving force to the pinion gear below the driven gear 18, the pinion gear drives the driven gear 18 to rotate, and the driven gear 18 drives the rotating shaft 3 and the valve plate 4 to rotate, so that the valve plate 4 is controlled to be opened and closed.
The part of the bottom of the gear shaft 15 connected with the valve body 1 is provided with a groove and knurling structure, so that the gear shaft 15 is connected with the valve body 1 more tightly, and the problem of loose gear shaft 15 in the axial direction and the circumferential direction is effectively solved.
The valve body 1 is provided with a motor screw insert 21 for mounting a motor, and the motor screw insert 21 is formed integrally with the valve body 1 by injection molding.
In order to meet the torque force of the screw during locking, the motor threaded insert 21 is prevented from loosening in the locking process, and a twill knurling and multi-section groove structure is designed outside the motor threaded insert 21, as shown in fig. 4, so that the motor threaded insert 21 can have large attaching and coating force in the valve body 1, and the loosening problem of the screw locking process is effectively solved.
The valve body 1 is also provided with the mounting hole insert 22, the mounting hole insert 22 mainly bears the axial compression force and the surface friction force in the bolt locking and attaching process, and in order to meet the locking and attaching requirements, the surface of the mounting hole insert 22 is provided with a straight knurl structure, so that the deformation problem in the bolt locking and attaching process is effectively solved.
The utility model provides an anti-corrosion plastic EGR valve, wherein the whole valve body is made of plastic, so that the problem of corrosion of water vapor, sulfide or chloride ions and the like in discharged materials to a valve seat is effectively solved; meanwhile, the problems of strength and size shrinkage of plastic materials are considered, and various connecting inserts are embedded in the valve body, so that the corrosion problem of a traditional aluminum valve is solved, and the problem of insufficient service life of the plastic valve body is also solved.
Because of the hot melting property of the plastic, the valve body is connected with the insert and the valve body is connected with the blanking cover in a welding way, so that the tightness is ensured, the sealing element between parts is omitted, and the cost is reduced.
Claims (7)
1. Anticorrosive plastic EGR valve, its characterized in that: the valve comprises a valve body (1) which is formed by injection molding of plastic materials, wherein a valve port (2) is arranged on the valve body (1), and a channel insert (14) which is in a step shape is arranged on the valve body (1) which is close to the air inlet position of the valve port (2); a rotating shaft (3) vertically penetrating through the valve port (2) is arranged in the flow passage of the valve body (1); a valve plate (4) corresponding to the valve port (2) is arranged on the rotating shaft (3) through a bolt assembly (6); the top of the valve body (1) is provided with a sensor top cover (5) with a sensor through a buckle (7), and the top of the rotating shaft (3) is provided with magnetic steel (9) which is matched with the sensor and realizes signal transmission of the rotating angle of the rotating shaft (3); a transmission assembly for driving the rotating shaft (3) to rotate is also arranged in the cavity at the upper part of the valve body (1); a blanking cover (13) which seals the flow passage is arranged at the bottom of the valve body (1); a gasket (11) and a check ring (12) for realizing axial positioning of the rotating shaft (3) are arranged at the bottom of the rotating shaft (3), and a spring (10) connected with a transmission assembly is arranged at the top of the rotating shaft (3); the check ring (12) is clamped in a check ring groove at the lower part of the rotating shaft (3), and the gasket (11) is arranged between the check ring (12) and the inner wall of the flow passage of the valve body (1).
2. The anti-corrosion plastic EGR valve of claim 1, wherein: a sealing ring (8) with a sealing function is arranged between the valve body (1) and the sensor top cover (5).
3. The anti-corrosion plastic EGR valve of claim 1, wherein: a needle bearing (19) for mounting the rotating shaft (3) is arranged on the valve body (1); the lower part of the rotating shaft (3) is provided with a self-lubricating shaft sleeve (20).
4. The anti-corrosion plastic EGR valve of claim 1, wherein: the transmission assembly comprises a driving gear (16) connected with the output shaft of the motor, an intermediate gear (17) meshed with the driving gear (16) for transmission, and a driven gear (18) arranged on the rotating shaft (3); the intermediate gear (17) is arranged on a gear shaft (15) on the valve body (1), and a pinion gear meshed with the driven gear (18) for transmission is further arranged on the gear shaft (15).
5. The anti-corrosion plastic EGR valve of claim 4, wherein: the valve body (1) is provided with a motor thread insert (21) for installing a motor, and the outer part of the motor thread insert (21) is provided with a diagonal knurling and multi-section groove structure for increasing the adhesive force of the screw.
6. The anti-corrosion plastic EGR valve of claim 4, wherein: the part of the bottom of the gear shaft (15) connected with the valve body (1) is provided with a groove and knurling structure for preventing the gear shaft (15) from loosening.
7. The anti-corrosion plastic EGR valve of claim 1, wherein: the valve body (1) is also provided with a mounting hole insert (22) for bearing axial compression force and surface friction force in the bolt locking and attaching process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420146615.4U CN220929547U (en) | 2024-01-22 | 2024-01-22 | Corrosion-proof plastic EGR valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420146615.4U CN220929547U (en) | 2024-01-22 | 2024-01-22 | Corrosion-proof plastic EGR valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220929547U true CN220929547U (en) | 2024-05-10 |
Family
ID=90940847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420146615.4U Active CN220929547U (en) | 2024-01-22 | 2024-01-22 | Corrosion-proof plastic EGR valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220929547U (en) |
-
2024
- 2024-01-22 CN CN202420146615.4U patent/CN220929547U/en active Active
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| GR01 | Patent grant |