CN112360607A - Environment-friendly exhaust pipe with silencing function - Google Patents
Environment-friendly exhaust pipe with silencing function Download PDFInfo
- Publication number
- CN112360607A CN112360607A CN202011248285.2A CN202011248285A CN112360607A CN 112360607 A CN112360607 A CN 112360607A CN 202011248285 A CN202011248285 A CN 202011248285A CN 112360607 A CN112360607 A CN 112360607A
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- CN
- China
- Prior art keywords
- exhaust pipe
- pipe body
- sealing cover
- push
- cover plate
- 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
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/007—Apparatus used as intake or exhaust silencer
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/18—Construction facilitating manufacture, assembly, or disassembly
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/04—Cleaning of, preventing corrosion or erosion in, or preventing unwanted deposits in, combustion engines
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
Abstract
The invention discloses an environment-friendly exhaust pipe with a silencing function, which comprises an exhaust pipe body and a tightening port, wherein the tightening port is arranged at one end of the exhaust pipe body and communicated with the exhaust pipe body, two mounting ports are arranged on the outer wall of the exhaust pipe body, sealing cover plates which are matched with the two mounting ports in a sealing mode are arranged in the two mounting ports, two drainage guide plates which are located in the exhaust pipe body are arranged on each sealing cover plate, an acoustical panel is arranged on the end face of each drainage guide plate, a connecting guide rail is further arranged on each drainage guide plate, a sliding seat which slides on the connecting guide rail is arranged on the connecting guide rail, a push-pull rod with the lower end hinged with the sliding seat is arranged on each sliding seat, and the push-pull rod penetrates through the sealing cover plates. The invention has simple structure, effectively reduces noise by utilizing the fluidity of the air flow guided by the guide plate and the vibration of the air flow absorbed by the silencing plate, can adjust the inclination angles of the guide plate and the silencing plate, and has convenient operation and stronger practicability.
Description
Technical Field
The invention relates to the technical field of environmental protection, in particular to an environment-friendly exhaust pipe with a silencing function.
Background
The automobile exhaust contains a large amount of toxic and harmful gases, which is most direct and obvious. The city population density is big, the quantity of car is also many, and the tail gas of emission is just also many, causes the human body more easily and directly inhales a large amount of tail gas, is the human body frustration, causes various diseases, leads to the death of people even, and the tail gas of emission is many, and the blast pipe is a part of engine exhaust system, and exhaust system mainly includes exhaust manifold, blast pipe and muffler, and the third school catalyst converter that generally controls engine pollutant discharges also installs in exhaust system, and the blast pipe generally includes front exhaust pipe and back blast pipe. The existing exhaust pipe greatly generates noise due to the vibration of air flow in the exhaust process, and influences the surrounding environment.
Disclosure of Invention
The invention aims to provide an environment-friendly exhaust pipe with a silencing function so as to achieve the aim.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides an environmental protection blast pipe with silence function, includes exhaust pipe body and tightens up the port, it is linked together with it to tighten up the one end setting at exhaust pipe body, be provided with two installation ports on the exhaust pipe body outer wall and all be equipped with the sealed apron that matches with it in two installation ports, all be provided with two drainage baffle that are located exhaust pipe body inside on every sealed apron, drainage baffle top portion is connected with sealed apron terminal surface through the connecting seat, still be provided with the connection guide rail on being provided with acoustical panel and the drainage baffle on the drainage baffle terminal surface, be provided with gliding seat of sliding on it on the connection guide rail, be equipped with the lower extreme articulated push-and-pull rod with it on the seat of sliding, the sealed slip of push-pull rod runs through sealed apron and is connected with the lift adjustment mechanism who sets up.
On the basis of the technical scheme, the invention also provides the following optional technical scheme:
in one alternative: the lifting adjusting mechanism comprises an adjusting screw rod and two adjusting support rods, two ends of the adjusting screw rod are rotatably installed on the sealing cover plate through support seats, the spiral directions of two ends of the adjusting screw rod are opposite, two spiral push-pull seats which are in spiral fit with the adjusting screw rod and the bottoms of the two spiral push-pull seats are in sliding fit with the end face of the sealing cover plate are arranged on the adjusting screw rod, the adjusting screw rod is driven to rotate by an adjusting motor arranged on the sealing cover plate, the lower ends of the two adjusting support rods are respectively hinged with the tops of the two spiral push-pull seats correspondingly, and the tops of the two adjusting support.
In one alternative: the side of the sealing cover plate is provided with a through hole, the outer wall of the exhaust pipe body is provided with a fixing bolt located at the edge of the installation port, and the fixing bolt penetrates through the through hole and is fastened through a nut.
In one alternative: the top end of the push-pull rod is sleeved with a connecting sleeve, the connecting sleeve is fastened through a connecting bolt, and the end part of the adjusting support rod is hinged to the outer wall of the connecting sleeve.
In one alternative: and a dust filter screen plate is further arranged between the exhaust pipe body and the tightening port, and a material collecting groove positioned at the lower side part of the dust filter screen plate is arranged on the side wall of the exhaust pipe body.
In one alternative: a dust scraping mechanism for cleaning the surface of the dust filter screen is arranged on the exhaust pipe body; the dust strikes off the mechanism and includes fixed scraper blade, strikes off the push rod, clearance motor and bar frame, strike off the sealed tip that slides and run through exhaust body top and its top fixed connection bar frame of push rod, strike off push rod bottom portion and be provided with fixed scraper blade, the clearance motor passes through the support mounting on exhaust body lateral wall, and the output of clearance motor is provided with and is provided with on rolling disc and the rolling disc terminal surface and dials the post, dials inside the post stretches into the bar frame.
In one alternative: the side of the fixed scraper is provided with a scraping strip which is propped against the side wall of the dust filter screen plate.
Compared with the prior art, the invention has the following beneficial effects:
utilize a plurality of drainage baffle boards and guide and reduce the velocity of flow of air current and avoid the too high cooperation of velocity of flow its vibration and noise generation under the blockking of drainage baffle board among the device, and the setting of acoustical panel can absorb the vibration when the air current flows and reduce the noise that the air current produced, and order about the push-and-pull rod through lift adjustment mechanism and reciprocate, the push-and-pull rod reciprocates and utilizes the slip of seat of sliding on connecting the guide rail and the articulated mobility of adjusting the inclination of drainage baffle board so that adapt to the air current velocity of flow and flow control air current of drainage baffle top and sealed apron terminal surface, lower noise. The invention has simple structure, effectively reduces noise by utilizing the fluidity of the air flow guided by the guide plate and the vibration of the air flow absorbed by the silencing plate, can adjust the inclination angles of the guide plate and the silencing plate, and has convenient operation and stronger practicability.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the connecting sleeve of the present invention.
Fig. 3 is a schematic structural view of the drainage guide plate of the present invention.
Notations for reference numerals: the exhaust pipe comprises an exhaust pipe body 1, a tightening port 2, a sealing cover plate 3, a drainage guide plate 4, a connecting seat 5, an installation port 6, a sound-absorbing plate 7, a push-pull rod 8, a connecting guide rail 9, a sliding seat 10, an adjusting screw rod 11, a spiral push-pull seat 12, an adjusting motor 13, an adjusting support rod 14, a connecting sleeve 15, a fixing bolt 16, a dust filter screen plate 17, a material collecting groove 18, a fixing scraper 19, a scraping strip 20, a scraping push rod 21, a cleaning motor 22, a strip-shaped frame 23, a shifting column 24, a rotating disc 25 and a connecting bolt 26.
Detailed Description
The present invention will be described in detail with reference to the following embodiments, wherein like or similar elements are designated by like reference numerals throughout the several views, and wherein the shape, thickness or height of the various elements may be expanded or reduced in practice. The examples are given solely for the purpose of illustration and are not intended to limit the scope of the invention. Any obvious modifications or variations can be made to the present invention without departing from the spirit or scope of the present invention.
Example 1
Referring to fig. 1 to 3, in an embodiment of the present invention, an environmentally friendly exhaust pipe with a silencing function includes an exhaust pipe body 1 and a tightening port 2, the tightening port 2 is arranged at one end of the exhaust pipe body 1 and communicated with the exhaust pipe body, two mounting ports 6 are arranged on the outer wall of the exhaust pipe body 1, sealing cover plates 3 which are matched with the two mounting ports 6 in a sealing way are arranged in the two mounting ports 6, two drainage guide plates 4 which are positioned in the exhaust pipe body 1 are arranged on each sealing cover plate 3, the top end parts of the drainage guide plates 4 are connected with the end surfaces of the sealing cover plates 3 through connecting seats 5, the end face of the drainage guide plate 4 is provided with an acoustic panel 7, the drainage guide plate 4 is also provided with a connecting guide rail 9, the connecting guide rail 9 is provided with a sliding seat 10 sliding on the connecting guide rail 9, the sliding seat 10 is provided with a push-pull rod 8, the lower end of the push-pull rod is hinged with the sliding seat, and the push-pull rod 8 hermetically penetrates through the sealing cover plate 3 in a sliding manner and is connected with a lifting adjusting mechanism arranged on the outer wall of the sealing cover plate 3;
when the exhaust pipe is used, when airflow flows to the tightening port 2 through the exhaust pipe body 1, the flow velocity of the airflow is reduced by utilizing the plurality of the drainage guide plates 4 and under the blocking of the drainage guide plates 4, so that the noise caused by the fact that the flow velocity is too high and the vibration is matched with the flow velocity is avoided, the noise reduction plate 7 can absorb the vibration generated when the airflow flows so as to reduce the noise generated by the airflow, the push-pull rod 8 is driven to move up and down through the lifting adjusting mechanism, the push-pull rod 8 moves up and down, the inclination angle of the drainage guide plates 4 is adjusted by the sliding of the sliding seat 10 on the connecting guide rail 9 and the hinging of the tops of the drainage guide plates 4 and the end face of the sealing;
the lifting adjusting mechanism comprises an adjusting screw rod 11 and two adjusting support rods 14, two end parts of the adjusting screw rod 11 are rotatably installed on the sealing cover plate 3 through a support, the spiral directions of two ends of the adjusting screw rod 11 are opposite, two spiral push-pull seats 12 which are in spiral fit with the adjusting screw rod 11 and the bottoms of the two spiral push-pull seats are in sliding fit with the end face of the sealing cover plate 3 are arranged on the adjusting screw rod 11, the adjusting screw rod 11 is driven to rotate by an adjusting motor 13 arranged on the sealing cover plate 3, the lower ends of the two adjusting support rods 14 are respectively hinged with the tops of the two spiral push-pull seats 12 correspondingly, and the top ends of the two adjusting support rods; the adjusting screw rod 11 is driven to rotate by the adjusting motor 13, the spiral push-pull seat 12 moves on the sealing cover plate 3 by the aid of spiral matching of the adjusting screw rod 11 and the spiral push-pull seat 12, the spiral push-pull seat 12 can push the push-pull rod 8 to move up and down by the aid of the adjusting support rod 14 when moving, and accordingly lifting of the push-pull rod 8 is achieved, and the inclination angle of the drainage guide plate 4 is adjusted;
a through hole (not shown) is formed in the side of the sealing cover plate 3, a fixing bolt 16 located at the edge of the mounting port 6 is arranged on the outer wall of the exhaust pipe body 1, the fixing bolt 16 penetrates through the through hole and is fastened through a nut, and the fixing bolt 16 is matched with the nut to facilitate disassembly; the top end of the push-pull rod 8 is sleeved with a connecting sleeve 15, the connecting sleeve 15 is fastened through a connecting bolt 26, the end part of the adjusting support rod 14 is hinged to the outer wall of the connecting sleeve 15, and the connecting sleeve 15 is installed at the top of the push-pull rod 8 through the connecting bolt 26 and is convenient to detach.
Example 2
The embodiment of the invention is different from the embodiment 1 in that: a dust filter screen plate 17 is further arranged between the exhaust pipe body 1 and the tightening port 2, a material collecting groove 18 positioned at the lower side part of the dust filter screen plate 17 is arranged on the side wall of the exhaust pipe body 1, and the dust filter screen plate 17 is arranged to filter dust particles in airflow flowing at a position where the dust filter screen plate can filter the dust particles and fall into the material collecting groove 18 to be stored; a dust scraping mechanism for cleaning the surface of the dust filter screen plate 17 is arranged on the exhaust pipe body 1; the dust scraping mechanism comprises a fixed scraper blade 19, a scraping push rod 21, a cleaning motor 22 and a strip-shaped frame 23, wherein the scraping push rod 21 penetrates through the top of the exhaust pipe body 1 in a sealing and sliding mode, the top end of the scraping push rod 21 is fixedly connected with the end part of the strip-shaped frame 23, the bottom end part of the scraping push rod 21 is provided with the fixed scraper blade 19, a scraping strip 20 which abuts against the side wall of the dust filter screen plate 17 is arranged on the side wall of the exhaust pipe body 1, the cleaning motor 22 is installed on the side wall of the exhaust pipe body 1 through a support, the output end of the cleaning motor 22 is provided with a rotating disc 25, a shifting column 24 is; the cleaning motor 22 is used for driving the rotating disc 25 to rotate and driving the shifting column 24 to rotate, and the shifting column 24 shifts the strip-shaped frame 23 to move up and down and drives the scraping push rod 21 and the fixed scraper 19 to move up and down, so that the scraping strip 20 moves up and down on the surface of the dust filter screen plate 17 to scrape off dust particles to avoid blockage.
The above description is only for the specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present disclosure, and all the changes or substitutions should be covered within the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.
Claims (7)
1. An environment-friendly exhaust pipe with a silencing function comprises an exhaust pipe body (1) and tightening ports (2), wherein the tightening ports (2) are arranged at one end of the exhaust pipe body (1) and communicated with the exhaust pipe body, two installation ports (6) are arranged on the outer wall of the exhaust pipe body (1), sealing cover plates (3) which are matched with the two installation ports (6) in a sealing mode are arranged in the two installation ports (6), the environment-friendly exhaust pipe is characterized in that two drainage guide plates (4) which are located in the exhaust pipe body (1) are arranged on each sealing cover plate (3), the top end portions of the drainage guide plates (4) are connected with the end faces of the sealing cover plates (3) through connecting seats (5), silencing plates (7) are arranged on the end faces of the drainage guide plates (4), connecting guide rails (9) are further arranged on the drainage guide plates (4), and sliding seats (10) which slide on the, the sliding seat (10) is provided with a push-pull rod (8) with the lower end hinged with the sliding seat, and the push-pull rod (8) penetrates through the sealing cover plate (3) in a sealing sliding mode and is connected with a lifting adjusting mechanism arranged on the outer wall of the sealing cover plate (3).
2. The exhaust pipe with the silencing function in accordance with claim 1, wherein the lifting adjusting mechanism comprises an adjusting screw rod (11) and two adjusting support rods (14), two ends of the adjusting screw rod (11) are rotatably mounted on the sealing cover plate (3) through a support, the two ends of the adjusting screw rod (11) have opposite spiral directions, two spiral pushing and pulling seats (12) which are spirally matched with the adjusting screw rod (11) and the bottoms of which are slidably matched with the end surface of the sealing cover plate (3) are arranged on the adjusting screw rod (11), the adjusting screw rod (11) is driven to rotate by an adjusting motor (13) arranged on the sealing cover plate (3), the lower ends of the two adjusting support rods (14) are correspondingly hinged to the tops of the two spiral pushing and pulling seats (12), and the top ends of the two adjusting support rods (14) are hinged to the tops of the two pushing and pulling rods (8).
3. The environmentally friendly exhaust pipe with the silencing function as recited in claim 1, wherein the sealing cover plate (3) is provided with a through hole at the side and the exhaust pipe body (1) is provided with a fixing bolt (16) at the edge of the mounting port (6) at the outer wall, and the fixing bolt (16) passes through the through hole and is fastened by a nut.
4. The environment-friendly exhaust pipe with the silencing function according to claim 3, wherein the top end of the push-pull rod (8) is sleeved with a connecting sleeve (15), the connecting sleeve (15) is fastened through a connecting bolt (26), and the end of the adjusting strut (14) is hinged with the outer wall of the connecting sleeve (15).
5. The exhaust pipe with the silencing function of any one of claims 1-4, wherein a dust filter screen (17) is further disposed between the exhaust pipe body (1) and the tightening port (2), and a material collecting groove (18) located at the lower side of the dust filter screen (17) is disposed on the sidewall of the exhaust pipe body (1).
6. The environmentally-friendly exhaust pipe with the silencing function as recited in claim 5, wherein the exhaust pipe body (1) is provided with a dust scraping mechanism for cleaning the surface of the dust filter screen (17); the dust scraping mechanism comprises a fixed scraper (19), a scraping push rod (21), a cleaning motor (22) and a strip-shaped frame (23), wherein the scraping push rod (21) penetrates through the top of the exhaust pipe body (1) in a sealing sliding mode and the end portion of the top end of the exhaust pipe body fixedly connected with the strip-shaped frame (23), the bottom end portion of the scraping push rod (21) is provided with the fixed scraper (19), the cleaning motor (22) is installed on the side wall of the exhaust pipe body (1) through a support, the output end of the cleaning motor (22) is provided with a shifting column (24) on a rotating disc (25) and the end face of the rotating disc (25), and the shifting column (24) stretches into the strip-shaped frame.
7. The exhaust pipe with silencing function of claim 6, wherein the fixed scraper (19) is provided with a scraper bar (20) at the side thereof for abutting against the side wall of the dust filter screen (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011248285.2A CN112360607A (en) | 2020-11-10 | 2020-11-10 | Environment-friendly exhaust pipe with silencing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011248285.2A CN112360607A (en) | 2020-11-10 | 2020-11-10 | Environment-friendly exhaust pipe with silencing function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112360607A true CN112360607A (en) | 2021-02-12 |
Family
ID=74509302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011248285.2A Pending CN112360607A (en) | 2020-11-10 | 2020-11-10 | Environment-friendly exhaust pipe with silencing function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112360607A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201162564Y (en) * | 2008-03-06 | 2008-12-10 | 三阳工业股份有限公司 | Variable exhaustion structure of engine |
| US20110011669A1 (en) * | 2009-07-14 | 2011-01-20 | Compx International Inc. | Sound dampening and wear protecting flapper configuration for marine exhaust system |
| JP2011080383A (en) * | 2009-10-05 | 2011-04-21 | Toyota Motor Corp | Exhaust device for internal combustion engine |
| CN204386747U (en) * | 2015-01-07 | 2015-06-10 | 中国人民解放军第二炮兵驻第三十一研究所军事代表室 | A kind of plug-type engine charge control gear |
| CN107191246A (en) * | 2017-07-15 | 2017-09-22 | 爱驰威汽车零部件（盐城）有限公司 | A kind of automotive muffler |
| CN109589709A (en) * | 2018-11-28 | 2019-04-09 | 刘同� | One kind being convenient for self-cleaning environmental protection air air purifying apparatus |
| CN211008835U (en) * | 2019-12-11 | 2020-07-14 | 湘西民族职业技术学院 | Automobile exhaust discharge pipe capable of purifying flue gas and conveniently replacing filter element |
-
2020
- 2020-11-10 CN CN202011248285.2A patent/CN112360607A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201162564Y (en) * | 2008-03-06 | 2008-12-10 | 三阳工业股份有限公司 | Variable exhaustion structure of engine |
| US20110011669A1 (en) * | 2009-07-14 | 2011-01-20 | Compx International Inc. | Sound dampening and wear protecting flapper configuration for marine exhaust system |
| JP2011080383A (en) * | 2009-10-05 | 2011-04-21 | Toyota Motor Corp | Exhaust device for internal combustion engine |
| CN204386747U (en) * | 2015-01-07 | 2015-06-10 | 中国人民解放军第二炮兵驻第三十一研究所军事代表室 | A kind of plug-type engine charge control gear |
| CN107191246A (en) * | 2017-07-15 | 2017-09-22 | 爱驰威汽车零部件（盐城）有限公司 | A kind of automotive muffler |
| CN109589709A (en) * | 2018-11-28 | 2019-04-09 | 刘同� | One kind being convenient for self-cleaning environmental protection air air purifying apparatus |
| CN211008835U (en) * | 2019-12-11 | 2020-07-14 | 湘西民族职业技术学院 | Automobile exhaust discharge pipe capable of purifying flue gas and conveniently replacing filter element |
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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 |
Application publication date: 20210212 |
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| RJ01 | Rejection of invention patent application after publication |