CN113638798B - Prevent sea water backward flow gas vent device - Google Patents
Prevent sea water backward flow gas vent device Download PDFInfo
- Publication number
- CN113638798B CN113638798B CN202110905205.4A CN202110905205A CN113638798B CN 113638798 B CN113638798 B CN 113638798B CN 202110905205 A CN202110905205 A CN 202110905205A CN 113638798 B CN113638798 B CN 113638798B
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- Prior art keywords
- exhaust
- guide rod
- floating ball
- guide sleeve
- shell
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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
- F01N13/085—Other arrangements or adaptations of exhaust conduits having means preventing foreign matter from entering exhaust conduit
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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
- F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
- F01N2590/02—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for marine vessels or naval applications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- 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 relates to the field of exhaust systems of marine diesel engines, and provides an exhaust port device for preventing seawater backflow, which comprises an exhaust pipe elbow, an exhaust diffuser pipe, a floating ball, a movement guide sleeve, an installation auxiliary ring, a support, a position indicator, a fastening screw and a small support, wherein the opening direction of the exhaust pipe elbow is downward, the tail end of the exhaust pipe elbow is welded with the protruding small support and the exhaust diffuser pipe, the exhaust diffuser pipe is conical, the floating ball comprises a high-temperature-resistant rubber ball shell and a movement guide rod, the movement guide rod is inserted into the movement guide sleeve and can move along the movement guide sleeve, the movement guide sleeve is fixed on the support at the bottom, and the installation auxiliary ring is locked at the top of the movement guide sleeve through the fastening screw. The seawater backflow preventing exhaust port device is simple in structure, safe to use and reliable in work, and can achieve automatic opening and closing of the exhaust port along with the liquid level and prevent seawater backflow of a diesel engine.
Description
Technical Field
The invention relates to the field of exhaust systems of marine diesel engines, in particular to a seawater backflow preventing exhaust port device for a marine diesel engine, which is used for preventing seawater backflow of the marine diesel engine with an exhaust port near a waterline.
Background
The marine diesel exhaust is typically located at the highest position of the vessel or near the waterline. When the exhaust port is positioned near the waterline, seawater can enter the exhaust pipeline of the diesel engine under the action of wind waves, and then the diesel engine is reversely poured to make the ship lose the main power. In order to prevent backflow, the prior art method is to increase the exhaust back pressure of the diesel engine, so that the exhaust can overcome the discharge of seawater pressure near a waterline, and therefore, the valve timing and the combustion phase of the diesel engine need to be adjusted in the design stage, so that the diesel engine has high exhaust back pressure, and the diesel engine has the cost of reduced power, increased oil consumption, deteriorated combustion and increased carbon deposition.
Disclosure of Invention
Aiming at the defects or improvement requirements of the prior art, the invention provides the seawater backflow prevention exhaust port device, which can effectively realize the automatic opening and closing of the exhaust port along with the liquid level, prevent the seawater backflow of the diesel engine and enable the low exhaust back pressure diesel engine with higher power and higher combustion efficiency to exhaust near a waterline.
In order to achieve the purpose, the invention adopts the following technical scheme.
The invention provides an exhaust port device for preventing seawater backflow, which comprises an exhaust pipe elbow, an exhaust diffuser pipe, a floating ball, a moving guide sleeve, an installation auxiliary ring, a support, a position indicator, a fastening screw and a small support, wherein the opening direction of the exhaust pipe elbow is downward, the tail end of the exhaust pipe elbow is welded with the small support and the exhaust diffuser pipe which are protruded, the exhaust diffuser pipe is conical, the floating ball comprises a high-temperature-resistant rubber ball shell and a moving guide rod, the moving guide rod is inserted into the moving guide sleeve and can move along the moving guide sleeve, the moving guide sleeve is fixed on the support at the bottom, and the installation auxiliary ring is locked at the top of the moving guide sleeve through the fastening screw.
In the technical scheme, the position indicators adopt passive contact signal devices and are provided with two sets in total, each set comprises a moving part and a fixing part, one set of the position indicators is used for indicating the floating ball to float upwards to close the exhaust port, the moving part is installed at the bottom of a steel bar capable of freely rotating, the top of the steel bar can rotate around a small support, the fixing part is fixed on an exhaust diffuser pipe, the exhaust diffuser pipe is provided with a long strip-shaped opening for the moving part to move, the other set of the position indicators is used for indicating the floating ball to completely fall, the moving part is installed at the bottom of a moving guide rod of the floating ball, and the fixing part is fixed on the support.
In the technical scheme, the floating ball comprises a high-temperature-resistant rubber ball shell, a stainless steel inner container, a stainless steel reinforcing plate and a motion guide rod, the stainless steel inner container is formed by welding an upper hemispherical shell and a lower hemispherical shell, and round holes matched with the motion guide rod are formed in the top of the upper hemispherical shell, the bottom of the lower hemispherical shell and the center of the stainless steel reinforcing plate and are used for being welded and formed after being assembled with the motion guide rod.
In the technical scheme, the buoyancy of the floating ball is 3-10 times of the gravity.
In the technical scheme, the motion guide rod is made of seawater corrosion resistant stainless steel, the exposed surface of the motion guide rod is subjected to wear-resistant ceramic spraying treatment, and paint for preventing marine organisms from attaching is coated on the exposed surface of the motion guide rod.
In the technical scheme, the thickness of the shell of the high-temperature-resistant rubber ball shell is not less than 10mm, the bottom of the shell is reinforced to form a local boss structure, the high-temperature-resistant rubber ball shell is made of high-temperature-resistant rubber, can resist the high temperature of 200 ℃ for a long time, and can resist the ocean environment with alternate sea water soaking and dry-wet conditions.
In the technical scheme, the installation auxiliary ring is of two circular arch bridge-shaped structures and is connected into a ring shape through bolts, and the installation auxiliary ring is used for assisting in installing the floating ball and preventing the floating ball from falling off after installation.
The seawater backflow preventing exhaust port device is provided with the floating ball which can move freely, when a wave crest of sea waves comes, the water level at the exhaust port rises temporarily, the floating ball floats upwards under the action of buoyancy to close the exhaust port, the seawater backflow preventing diesel engine is prevented, when a wave trough of the sea waves arrives, the water level at the exhaust port falls, and the floating ball falls under the action of gravity to open the exhaust port. When the wind wave stops, the floating ball keeps the exhaust port open under the action of gravity, and the diesel engine can normally exhaust and work. The exhaust port is mainly used for diesel engine exhaust ports of ships and marine structures, and especially is an exhaust port arranged near a waterline.
Drawings
Fig. 1 is a schematic structural view of the seawater backflow prevention exhaust port device of the present invention.
In the figure: 1-exhaust pipe elbow, 2-exhaust diffuser pipe, 3-floating ball, 4-motion guide sleeve, 5-installation auxiliary ring, 6-support, 7-position indicator, 8-fastening screw, 9-small support, 3.1-high temperature resistant rubber ball shell, 3.2-stainless steel inner container, 3.3-stainless steel reinforcing plate and 3.4-motion guide rod.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
In the present invention, unless otherwise specifically stated or limited, the terms "disposed," "mounted," "connected," "fixed," and the like are to be construed broadly as understood by those skilled in the art, and may be, for example, fixedly connected, detachably connected, or integrated; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
As shown in fig. 1, the embodiment provides an exhaust outlet device for preventing seawater backflow, which includes an exhaust pipe elbow 1, an exhaust diffuser pipe 2, a floating ball 3, a moving guide sleeve 4, an installation auxiliary ring 5, a support 6, a position indicator 7, a fastening screw 8 and a small support 9. The opening direction of the exhaust pipe elbow 1 is downward, the tail end of the exhaust pipe elbow is welded with a small protruding support 9 and an exhaust diffuser pipe 2, and the exhaust diffuser pipe 2 is conical and has the functions of reducing exhaust speed, limiting the movement range of the floating ball, preventing the floating ball from being lost and providing a free movement space for an indicator moving part.
The floating ball 3 comprises a high-temperature-resistant rubber ball shell 3.1, a stainless steel inner container 3.2, a stainless steel reinforcing plate 3.3 and a motion guide rod 3.4, the stainless steel inner container 3.2 is formed by welding an upper hemispherical shell and a lower hemispherical shell, and round holes matched with the motion guide rod are formed in the top of the upper hemispherical shell, the bottom of the lower hemispherical shell and the center of the stainless steel reinforcing plate and are used for being welded and formed after being assembled with the motion guide rod. The motion guide rod is inserted into the motion guide sleeve 4 and can move along the motion guide sleeve 4, and the motion guide sleeve 4 is fixed on a support 6 at the bottom.
The floating ball manufacturing process comprises the steps of firstly, punching and forming an upper hemispherical shell and a lower hemispherical shell by using a hemispherical die, then welding a motion guide rod and the upper hemispherical shell at the position A, then installing a disc-shaped stainless steel reinforcing plate to complete B, C two-position welding, and then welding a position D where the lower hemispherical shell is connected with the motion guide rod, a position E where the lower hemispherical shell is connected with the upper hemispherical shell and a position F where the motion guide rod is connected with the upper hemispherical shell into a closed whole. A. D, E and performing radiographic inspection and tightness inspection, and performing a hydraulic external pressure strength test to inspect the strength and tightness of the stainless steel inner container. Finally, the high-temperature resistant rubber ball shell 3.1 and the buffering boss at the bottom of the floating ball are formed by vulcanizing high-temperature resistant rubber.
In the above embodiment, the position indicator 7 adopts a passive contact signal device, and there are two sets, each set includes a moving part and a fixing part, one set of the position indicator 7 is used for indicating the floating ball to float upwards to close the exhaust port, the moving part is installed at the bottom of a steel bar capable of freely rotating, the top of the steel bar can rotate around a small support 9, the fixing part is fixed on the exhaust diffuser pipe 2, the exhaust diffuser pipe 2 is provided with a long strip-shaped opening for the moving part to move, the other set of the position indicator 7 is used for indicating the floating ball to completely fall, the moving part is installed at the bottom of a moving guide rod 3.4 of the floating ball 3, and the fixing part is fixed on the support 6.
In the above embodiment, the buoyancy of the floating ball is 3 to 10 times of the gravity.
In the embodiment, the motion guide rod is made of seawater corrosion resistant stainless steel, the exposed surface of the motion guide rod is subjected to wear-resistant ceramic spraying treatment, and paint for preventing marine organisms from attaching is coated on the exposed surface of the motion guide rod.
In the embodiment, the thickness of the high-temperature-resistant rubber ball shell 3.1 is not less than 10mm, the bottom of the high-temperature-resistant rubber ball shell is reinforced to form a local boss structure, the high-temperature-resistant rubber ball shell is made of high-temperature-resistant rubber, can resist the high temperature of 200 ℃ for a long time, and can resist the ocean environment with alternate sea water soaking and dry-wet conditions.
In the above embodiment, the installation auxiliary ring 5 has two circular arch bridge-shaped structures, and is connected into a ring shape by bolts, so as to assist in installing the floating ball 3 and prevent the floating ball from falling off after installation. The auxiliary mounting ring 5 is locked on the top of the motion guide sleeve 4 through a fastening screw 8.
When the seawater level fluctuates and rises, the device disclosed by the embodiment of the invention automatically floats upwards by utilizing the buoyancy of the floating ball to close the exhaust port, so that the seawater is prevented from flowing backwards into the diesel engine; when the seawater level fluctuates and falls, the gravity of the floating ball automatically falls to open the exhaust port, so that the exhaust port is automatically opened and closed along with the seawater level, and the seawater is prevented from flowing backwards into the diesel engine.
Details not described in this specification are within the skill of the art that are well known to those skilled in the art.
The embodiments of the present invention are not limited to the above-mentioned embodiments, and may be combined with each other according to the technical features of the claims, and the above-mentioned embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of the present invention.
Claims (6)
1. The utility model provides a prevent sea water backward flow gas vent device which characterized in that: the exhaust pipe comprises an exhaust pipe elbow, an exhaust diffuser pipe, a floating ball, a moving guide sleeve, an installation auxiliary ring, a support, a position indicator, a fastening screw and a small support, wherein the opening direction of the exhaust pipe elbow faces downwards, the tail end of the exhaust pipe elbow is welded with the small support and the exhaust diffuser pipe which are protruded, the exhaust diffuser pipe is conical, the floating ball comprises a high-temperature-resistant rubber ball shell and a moving guide rod, the moving guide rod is inserted into the moving guide sleeve and can move along the moving guide sleeve, the moving guide sleeve is fixed on the support at the bottom, the installation auxiliary ring is locked at the top of the moving guide sleeve through the fastening screw, the position indicator adopts a passive contact signal device, the number of the passive contact signal devices is two, each passive contact signal device comprises a moving part and a fixing part, one position indicator is used for indicating the floating ball to float upwards to close an exhaust port, and the moving part is arranged at the bottom of a steel bar which can rotate freely, the top of the steel bar can rotate around the small support, the fixing part is fixed on the exhaust diffuser pipe, a long strip-shaped opening for the movement of the moving part is formed in the exhaust diffuser pipe, the other set of position indicator is used for indicating the floating ball to fall completely, the moving part is installed at the bottom of the moving guide rod of the floating ball, and the fixing part is fixed on the support.
2. The seawater backflow prevention vent device according to claim 1, wherein: the floating ball comprises a high-temperature-resistant rubber ball shell, a stainless steel inner container, a stainless steel reinforcing plate and a movement guide rod, wherein the stainless steel inner container is formed by welding an upper hemispherical shell and a lower hemispherical shell, and round holes matched with the movement guide rod are formed in the top of the upper hemispherical shell, the bottom of the lower hemispherical shell and the center of the stainless steel reinforcing plate and are used for being welded and formed after being assembled with the movement guide rod.
3. The seawater backflow prevention vent device according to claim 1, wherein: the buoyancy of the floating ball is 3-10 times of the gravity.
4. The seawater backflow prevention vent device according to claim 1 or 2, wherein: the motion guide rod is made of stainless steel which is resistant to seawater corrosion, the exposed surface of the motion guide rod is subjected to wear-resistant ceramic spraying treatment, and paint which is resistant to marine organism adhesion is coated on the exposed surface of the motion guide rod.
5. The seawater backflow prevention vent device according to claim 1, wherein: the shell thickness of the high-temperature-resistant rubber ball shell is not less than 10mm, the bottom of the high-temperature-resistant rubber ball shell is reinforced to form a local boss structure, the high-temperature-resistant rubber ball shell is made of high-temperature-resistant rubber, can resist the high temperature of 200 ℃, and can resist the ocean environment with seawater immersion and alternate dry and wet.
6. The seawater backflow prevention vent device according to claim 1, wherein: the installation auxiliary ring is of two circular arch bridge-shaped structures and is connected into a ring shape through bolts for assisting in installing the floating ball.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110905205.4A CN113638798B (en) | 2021-08-08 | 2021-08-08 | Prevent sea water backward flow gas vent device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110905205.4A CN113638798B (en) | 2021-08-08 | 2021-08-08 | Prevent sea water backward flow gas vent device |
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| Publication Number | Publication Date |
|---|---|
| CN113638798A CN113638798A (en) | 2021-11-12 |
| CN113638798B true CN113638798B (en) | 2022-09-30 |
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| CN202110905205.4A Active CN113638798B (en) | 2021-08-08 | 2021-08-08 | Prevent sea water backward flow gas vent device |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9123486D0 (en) * | 1991-11-05 | 1991-12-18 | Air Cleaner Tech Services | A valve |
| CN203499787U (en) * | 2013-09-30 | 2014-03-26 | 三峡大学 | Underwater power supercharging and air exhausting device preventing water from flowing backward |
| CN203627067U (en) * | 2013-10-29 | 2014-06-04 | 重庆大唐国际彭水水电开发有限公司 | Free type gulp valve of large-scale hydro-generator |
| CN204985874U (en) * | 2015-08-31 | 2016-01-20 | 缪毅 | Prevent simple and easy check valve that extra income flows backward |
| CN108678470A (en) * | 2018-05-04 | 2018-10-19 | 刘乐凝 | A kind of automobile waterproof bath unit being fixed on parking stall |
| CN212775753U (en) * | 2020-08-18 | 2021-03-23 | 广州市诺正机械设备有限公司 | A prevent equipment of flowing backward for hydraulic engineering |
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