Tail gas purifier structure

Abstract

The utility model discloses a tail gas purifier structure which comprises a DOC assembly, the DOC assembly comprises a shell and an inner core, one side of the shell and one side of the inner core are connected with a first connecting flange, the other side of the DOC assembly is connected with one side of an exhaust corrugated pipe through a hexagonal flange nut and a hexagonal flange bolt, and the exhaust corrugated pipe comprises a corrugated outer pipe and a corrugated inner pipe. And a cavity arranged between the corrugated outer pipe and the corrugated inner pipe is communicated with a cavity arranged between the shell and the inner core. According to the tail gas purifier structure, the first connecting flange is connected with an engine connector, so that cooling water in an engine enters a cavity between the shell and the inner core through a flange through hole, and then enters a cavity between the corrugated outer pipe and the corrugated inner pipe through a through hole formed in the transition flange; and finally, the cooling water enters the washing water tank through a through hole formed in the second connecting flange, so that the temperature in the tail gas purifier is reduced by the cooling water, and the service life of the tail gas purifier is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field related to tail gas purifiers, in particular to a tail gas purifier structure. Background Art

[0002] Internal combustion engines use gasoline, diesel, LPG, or CNG as fuel. The main harmful substances emitted are HC, CO, NOx, and particulate matter (black smoke). Exhaust gas purifiers typically consist of a metal honeycomb substrate coated with a precious metal catalyst. The operating principle is that when high-temperature exhaust gas passes through the purifier, HC, CO, and particulate matter react chemically with oxygen under the influence of the catalyst and high temperature, turning them into non-toxic water and carbon dioxide.

[0003] After searching, I found a typical prior art exhaust purifier, such as that disclosed in publication number CN206205957U. This exhaust purifier comprises a sequentially connected exhaust pipe connector, a bellows, a purifier body, and an exhaust port. The exhaust pipe connector is equipped with an elastic latch; the bellows is filled with glass fiber; and the purifier body is housed within a catalytic filter. The bellows further reduces exhaust noise, improves silencing performance, and improves exhaust temperature. The catalytic filter has a high conversion rate for carbon monoxide, hydrocarbons, odor, and particulate matter (PM), reduces nitrogen oxide emissions, and further reduces noise pollution.

[0004] In summary, when the existing exhaust purifier is in use, the high-temperature exhaust gas entering the exhaust purifier for purification is too hot and is not cooled down in time, causing heat to accumulate in the exhaust purifier, thereby affecting the service life of the exhaust purifier. In view of the above problems, the existing equipment needs to be improved. Utility Model Content

[0005] The purpose of the present utility model is to provide an exhaust gas purifier structure to solve the problem of the existing exhaust gas purifier proposed in the above background technology, that when in use, the high-temperature exhaust gas temperature entering the exhaust gas purifier for purification is too high and is not cooled in time, so that heat accumulates in the exhaust gas purifier, thereby affecting the service life of the exhaust gas purifier.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: comprising a DOC assembly,

[0007] The DOC assembly includes an outer shell and an inner core, and an inner core is arranged inside the outer shell. At the same time, the outer shell and one side of the inner core are connected to a first connecting flange. The middle of the first connecting flange is arranged corresponding to the air inlet arranged on one side of the DOC assembly, and the first connecting flange is located at a cavity arranged between the outer shell and one side of the inner core and has multiple flange through holes equidistantly opened. The other side of the DOC assembly is connected to one side of the exhaust bellows through a hexagonal flange face nut and a hexagonal flange face bolt, and a transition metal graphite pad is arranged between the other side of the DOC assembly and one side of the exhaust bellows. At the same time, a metal graphite pad is arranged on the other side of the exhaust bellows. The exhaust bellows includes a corrugated outer tube and a corrugated inner tube, and the cavity arranged between the corrugated outer tube and the corrugated inner tube is communicated with the cavity arranged between the outer shell and the inner core.

[0008] Preferably, the outer shell consists of an outer left plate, an outer upper plate, an outer right plate and an outer lower plate, and an outer bent pipe is provided on one side of the outer left plate, and a first reducer is provided on one side of the outer right plate, and a fixing seat is symmetrically provided on the upper end of the outer upper plate.

[0009] Preferably, the inner core is composed of an inner left plate, an inner upper plate, an inner right plate and an inner lower plate, and an inner bent pipe is provided on one side of the inner left plate, and the inner bent pipe is located inside the outer bent pipe. An inner straight pipe is provided on one side of the inner right plate, and the inner straight pipe is located inside the first reducer. A DOC metal carrier is symmetrically provided on one side of the inner core close to the inner straight pipe.

[0010] Preferably, a drain joint is provided on one side of the inner bend pipe, and the drain joint passes through the outer bend pipe and is threadedly connected to the external hexagonal bolt.

[0011] Preferably, the corrugated outer tube includes a steel wire braided corrugated tube, a second reducer, a transition flange, an external connecting tube, a transition tube and a second connecting flange. One side of the steel wire braided corrugated tube is connected to the transition flange through the second reducer, and the other side of the steel wire braided corrugated tube is connected to the second connecting flange through the external connecting tube and the transition tube. At the same time, the second connecting flange and the transition flange are both provided with through holes, and the through holes are arranged corresponding to the cavity between the corrugated outer tube and the corrugated inner tube.

[0012] Preferably, the corrugated inner tube includes an inner tube I, an inner telescopic tube outer corrugated tube and an inner tube II, the inner tube I is located on the inner side of the second reducer, and one side of the inner tube I is connected to the inner tube II through the inner telescopic tube outer corrugated tube, while the inner telescopic tube outer corrugated tube is located on the inner side of the steel wire braided corrugated tube, and the inner tube II is located on the inner side of the outer connecting tube and the transition tube.

[0013] Preferably, the transition metal graphite pad and the metal graphite pad have the same structure, with the outer layer being copper and the inner layer being graphite.

[0014] Compared with the prior art, the beneficial effects of the present invention are: the tail gas purifier structure,

[0015] When the existing exhaust purifier is in use, the high-temperature exhaust gas entering the exhaust purifier for purification is too hot and is not cooled down in time, causing heat to accumulate in the exhaust purifier, thereby affecting the service life of the exhaust purifier. The present application is connected to the engine interface through a first connecting flange, so that the cooling water inside the engine enters the cavity between the outer shell and the inner core through the flange through-hole, and then enters the cavity between the corrugated outer tube and the corrugated inner tube through the through-hole opened on the transition flange, and finally enters the wash water tank through the through-hole opened on the second connecting flange, so that the cooling water cools down the temperature in the exhaust purifier, thereby extending the service life of the exhaust purifier. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the front cross-sectional structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the front cross-sectional structure of the DOC assembly of the present utility model;

[0019] Figure 4 This is a schematic diagram of the front cross-sectional structure of the inner core of the utility model;

[0020] Figure 5 This is a rear view structural diagram of the utility model;

[0021] Figure 6 This is a schematic diagram of the top view of the structure of the utility model;

[0022] Figure 7 This is a schematic diagram of the cross-sectional structure of the utility model from above;

[0023] Figure 8 This is a schematic diagram of the front cross-sectional structure of the exhaust bellows of the present invention.

[0024] In the figure: 1. DOC assembly; 101. Outer shell; 1011. Outer left plate; 1012. Outer upper plate; 1013. Outer right plate; 1014. Outer lower plate; 1015. Outer elbow; 1016. First reducer; 1017. Fixing seat; 102. Inner core; 1021. Inner left plate; 1022. Inner upper plate; 1023. Inner right plate; 1024. Inner lower plate; 1025. Inner elbow; 1026. Drain connector; 1027. Inner straight pipe; 1028. DOC metal carrier; 103. First connecting flange; 104. Air inlet; 105, flange through hole; 2, exhaust bellows; 201, corrugated outer tube; 2011, steel wire braided bellows; 2012, second reducer; 2013, transition flange; 2014, external connecting tube; 2015, transition tube; 2016, second connecting flange; 202, corrugated inner tube; 2021, inner tube I; 2022, inner expansion tube outer bellows; 2023, inner tube II; 3, metal graphite gasket; 4, hexagonal flange face nut; 5, hexagonal flange face bolt; 6, transition metal graphite gasket; 7, external hexagonal bolt. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figure 1-8 The utility model provides a technical solution: an exhaust gas purifier structure, according to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 7As shown, the DOC assembly 1 includes an outer shell 101 and an inner core 102, and the inner core 102 is arranged inside the outer shell 101, and the outer shell 101 is composed of an outer left plate 1011, an outer upper plate 1012, an outer right plate 1013 and an outer lower plate 1014, and an outer bend pipe 1015 is provided on one side of the outer left plate 1011, and a first reducer 1016 is provided on one side of the outer right plate 1013. A fixing seat 1017 is symmetrically provided on the upper end of the outer upper plate 1012, and the fixing seat 1017 is used to facilitate the installation and fixation of the DOC assembly 1. The inner core 102 is composed of an inner left plate 1021, an inner upper plate 1022, an inner right plate 1023 and an inner lower plate 102 4, and an inner curved pipe 1025 is provided on one side of the inner left plate 1021, and the inner curved pipe 1025 is located inside the outer curved pipe 1015, an inner straight pipe 1027 is provided on one side of the inner right plate 1023, and the inner straight pipe 1027 is located inside the first reducer 1016, and a DOC metal carrier 1028 is symmetrically provided on one side of the inner core 102 near the inner straight pipe 1027, one of the DOC metal carriers 1028 is coated with precious metal active elements such as platinum, palladium, and passivation, which promotes the oxidation-reduction reaction of CO, HC in the exhaust gas, and a part of the organic soluble SOF in PM to generate harmless CO2 and H20 for discharge, while fine Soot particles will also react chemically with oxygen to generate D02. Another DOC metal carrier 1028 uses wall-flow porous honeycomb ceramics as a carrier. The adjacent honeycomb channels are alternately blocked at both ends. When the exhaust gas passes through the DOC metal carrier 1028, the airflow is forced to pass through the porous wall surface, and the particulate matter is captured in the wall hole and on the inlet wall surface. Its capture efficiency can reach 90%. When the DOC metal carrier 1028 is actively regenerated, the soot particles will undergo redox reactions with the oxygen and nitrogen oxides in the exhaust gas and release heat to achieve the purpose of regeneration. A water discharge connector 1026 is provided on one side of the inner bend pipe 1025, and the water discharge connector 1026 The outer bend pipe 1015 is threadedly connected to the external hexagonal bolt 7, and the external hexagonal bolt 7 is used to facilitate sealing of the drain joint 1026. At the same time, the outer shell 101 and one side of the inner core 102 are connected to the first connecting flange 103. The middle of the first connecting flange 103 is corresponding to the air inlet 104 set on one side of the DOC assembly 1, and the first connecting flange 103 is located in the cavity set between the outer shell 101 and one side of the inner core 102. A plurality of flange through holes 105 are equidistantly provided, so that cooling water can easily enter the cavity between the outer shell 101 and the inner core 102, thereby cooling the temperature on the inner core 102 while also having a certain noise reduction effect.

[0027] according to Figure 1 、 Figure 2 、 Figure 5 、 Figure 6 Figure 7 and Figure 8As shown, the other side of the DOC assembly 1 is connected to one side of the exhaust bellows 2 through a hexagonal flange nut 4 and a hexagonal flange bolt 5, and a transition metal graphite gasket 6 is provided between the other side of the DOC assembly 1 and one side of the exhaust bellows 2. The transition metal graphite gasket 6 has the same structure as the metal graphite gasket 3, with an outer layer of copper and an inner layer of graphite. At the same time, a metal graphite gasket 3 is provided on the other side of the exhaust bellows 2. The exhaust bellows 2 includes a corrugated outer tube 201 and a corrugated inner tube 20 2, and the cavity set between the corrugated outer tube 201 and the corrugated inner tube 202 is communicated with the cavity set between the shell 101 and the inner core 102, the corrugated outer tube 201 includes a steel wire braided corrugated tube 2011, a second reducer 2012, a transition flange 2013, an outer connecting tube 2014, a transition tube 2015 and a second connecting flange 2016, one side of the steel wire braided corrugated tube 2011 is connected to the transition flange 2013 through the second reducer 2012, and the other side of the steel wire braided corrugated tube 2011 is connected to the second connecting flange 2016 through the outer connecting tube 2014 and the transition tube 2015, while the second connecting flange 2016 and the transition flange 2013 are both provided with through holes, the through holes are arranged corresponding to the cavity between the corrugated outer tube 201 and the corrugated inner tube 202, through the through holes, the cooling water inside the DOC assembly 1 enters the exhaust bellows 2 to cool the exhaust bellows 2, The corrugated inner tube 202 includes an inner tube I 2021, an inner telescopic tube outer corrugated tube 2022 and an inner tube II 2023. The inner tube I 2021 is located on the inner side of the second reducer 2012, and one side of the inner tube I 2021 is connected through the inner telescopic tube outer corrugated tube 2022 and the inner tube II 2023. At the same time, the inner telescopic tube outer corrugated tube 2022 is located on the inner side of the steel wire braided corrugated tube 2011, and the inner tube II 2023 is located on the inner side of the external connecting tube 2014 and the transition tube 2015.

[0028] During use, the exhaust gas enters the DOC assembly 1 through the air inlet 104, and the coolant in the engine simultaneously enters the cavity between the outer shell 101 and the inner core 102 through the flange through-hole 105. The exhaust gas is then filtered and purified by the DOC metal carrier 1028 and enters the exhaust bellows 2 for discharge. At the same time, the coolant enters the cavity set between the corrugated outer tube 201 and the corrugated inner tube 202 through the through-hole opened on the transition flange 2013, and finally enters the wash water tank through the through-hole opened on the second connecting flange 2016.

[0029] The directions or positional relationships indicated by terms such as "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the protection content of the present invention.

[0030] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An exhaust gas purifier structure, comprising a DOC assembly (1), characterized in that: The DOC assembly (1) comprises an outer shell (101) and an inner core (102), and the inner core (102) is arranged inside the outer shell (101), and one side of the outer shell (101) and the inner core (102) are connected to a first connecting flange (103), the middle of the first connecting flange (103) is arranged corresponding to the air inlet (104) arranged on one side of the DOC assembly (1), and the first connecting flange (103) is located in a cavity arranged between the outer shell (101) and one side of the inner core (102) and has multiple flange through holes (105) equidistantly opened. 1) The other side is connected to one side of the exhaust bellows (2) through a hexagonal flange nut (4) and a hexagonal flange bolt (5), and a transition metal graphite gasket (6) is provided between the other side of the DOC assembly (1) and one side of the exhaust bellows (2), and a metal graphite gasket (3) is provided on the other side of the exhaust bellows (2), the exhaust bellows (2) comprising a bellows outer tube (201) and a bellows inner tube (202), and a cavity provided between the bellows outer tube (201) and the bellows inner tube (202) is communicated with a cavity provided between the outer shell (101) and the inner core (102).

2. The exhaust gas purifier structure according to claim 1, characterized in that: The outer shell (101) is composed of an outer left plate (1011), an outer upper plate (1012), an outer right plate (1013) and an outer lower plate (1014), and an outer curved pipe (1015) is provided on one side of the outer left plate (1011), and a first reducing pipe (1016) is provided on one side of the outer right plate (1013), and a fixing seat (1017) is symmetrically provided on the upper end of the outer upper plate (1012).

3. The exhaust gas purifier structure according to claim 1, characterized in that: The inner core (102) is composed of an inner left plate (1021), an inner upper plate (1022), an inner right plate (1023) and an inner lower plate (1024), and an inner curved tube (1025) is provided on one side of the inner left plate (1021), and the inner curved tube (1025) is located inside the outer curved tube (1015). An inner straight tube (1027) is provided on one side of the inner right plate (1023), and the inner straight tube (1027) is located inside the first reducer (1016). A DOC metal carrier (1028) is symmetrically provided on one side of the inner core (102) close to the inner straight tube (1027).

4. The exhaust gas purifier structure according to claim 3, characterized in that: A drain joint (1026) is provided on one side of the inner bend pipe (1025), and the drain joint (1026) passes through the outer bend pipe (1015) and is threadedly connected to the external hexagonal bolt (7).

5. The exhaust gas purifier structure according to claim 1, characterized in that: The corrugated outer tube (201) comprises a steel wire braided corrugated tube (2011), a second reducer (2012), a transition flange (2013), an outer connecting tube (2014), a transition tube (2015) and a second connecting flange (2016); one side of the steel wire braided corrugated tube (2011) is connected to the transition flange (2013) via the second reducer (2012), and the other side of the steel wire braided corrugated tube (2011) is connected to the second connecting flange (2016) via the outer connecting tube (2014) and the transition tube (2015); and both the second connecting flange (2016) and the transition flange (2013) are provided with through holes, and the through holes are arranged corresponding to the cavity between the corrugated outer tube (201) and the corrugated inner tube (202).

6. The exhaust gas purifier structure according to claim 1, characterized in that: The corrugated inner tube (202) comprises an inner tube I (2021), an inner telescopic tube outer corrugated tube (2022) and an inner tube II (2023), wherein the inner tube I (2021) is located inside the second reducer (2012), and one side of the inner tube I (2021) is connected to the inner tube II (2023) via the inner telescopic tube outer corrugated tube (2022), while the inner telescopic tube outer corrugated tube (2022) is located inside the steel wire braided corrugated tube (2011), and the inner tube II (2023) is located inside the outer connecting tube (2014) and the transition tube (2015).

7. The exhaust gas purifier structure according to claim 1, characterized in that: The transition metal graphite pad (6) has the same structure as the metal graphite pad (3), with an outer layer of copper and an inner layer of graphite.

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