Air inlet structure of three-way catalyst

Abstract

The utility model discloses an air inlet structure of a three-way catalytic converter, which relates to the technical field of three-way catalytic converters, and comprises a three-way catalytic converter shell consisting of a catalytic converter shell, an exhaust pipe and an air inlet pipe, and a dismounting assembly, the dismounting and mounting assembly comprises a quick connecting unit, a pre-fixing unit and a reinforcing unit. The quick connection unit is used for achieving butt joint and assembly of the air inlet pipe and the catalytic converter shell. The pre-fixing unit is used for achieving preliminary fixing of the quick connecting unit. The reinforcing unit is used for further fixing the quick connecting unit and the pre-fixing unit, and stable connection of the air inlet pipe and the catalytic converter shell is achieved. According to the three-way catalytic converter, the air inlet pipe and the catalytic converter shell can be rapidly disassembled and assembled through the disassembling and assembling assembly, the ceramic carrier in the catalytic converter shell can be conveniently cleaned and replaced through the detachable structure of the air inlet pipe, the overall operation is simple and convenient, and the maintenance work efficiency of the three-way catalytic converter can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of three-way catalytic converters, in particular to an air inlet structure of a three-way catalytic converter. Background Technique

[0002] The three-way catalytic converter is the most important off-vehicle purification device installed in the automobile exhaust system. It can convert harmful gases such as CO, HC, and NOx discharged from the automobile exhaust into harmless carbon dioxide, water, and nitrogen through oxidation and reduction reactions, thereby purifying the automobile exhaust.

[0003] Most of the existing three-way catalytic converter shells are of an integrated structure. When it is necessary to clean or replace the ceramic carrier inside the three-way catalytic converter shell, the shell needs to be cut along the transition position between the air inlet pipe part and the catalytic converter shell, so as to access the ceramic carrier. After the cleaning and replacement are completed, the air inlet pipe part and the catalytic converter shell need to be welded and fixed again. The overall operation is inconvenient and the work efficiency is low. Based on this, an air inlet structure of a three-way catalytic converter that is easy to disassemble and assemble is provided. Content of the Utility Model

[0004] The purpose of the utility model is to provide an air inlet structure of a three-way catalytic converter to solve the problems in the above background.

[0005] To achieve the above purpose, the utility model provides the following technical solution: An air inlet structure of a three-way catalytic converter, comprising a three-way catalytic converter housing composed of a catalytic converter shell, an exhaust pipe, and an air inlet pipe. The exhaust pipe is fixed to one end of the catalytic converter shell, and the air inlet pipe is fixedly installed at the other end of the catalytic converter shell through a disassembly and assembly component;

[0006] The disassembly and assembly component includes a quick connection unit, a pre-fixing unit, and a reinforcement unit;

[0007] The quick connection unit is used to realize the docking and assembly of the air inlet pipe and the catalytic converter shell;

[0008] The pre-fixing unit is used to realize the preliminary fixation of the quick connection unit;

[0009] The reinforcement unit is used to further fix the quick connection unit and the pre-fixing unit to realize the stable connection between the air inlet pipe and the catalytic converter shell.

[0010] As a further scheme of the utility model: The quick connection unit includes a first connection flange, a docking column, a second connection flange, and a docking hole;

[0011] The first connecting flange is fixed to one end of the intake pipe close to the catalytic converter housing, the docking post is fixed to one end of the first connecting flange close to the catalytic converter housing, the second connecting flange is fixed to one end of the catalytic converter housing close to the intake pipe, and the docking hole is opened on one side of the second connecting flange and penetrates to the other side of the docking hole;

[0012] There are two groups of the docking posts, and the two groups of docking posts are symmetrically distributed at the upper and lower ends of the first connecting flange with the horizontal center of the first connecting flange as the symmetry axis, and the number of the two groups of docking posts is different;

[0013] The first connecting flange realizes the positioning and splicing of the intake pipe and the catalytic converter housing by the docking post penetrating the docking hole.

[0014] As a further solution of the present utility model: the pre-fixing unit includes a clamping groove, a clamping ring piece, and a notch groove;

[0015] The clamping grooves are respectively opened on the upper and lower end faces of the two groups of docking posts, the clamping ring piece is sleeved on the outer side of the catalytic converter housing, and the notch grooves are symmetrically opened on both sides of the clamping ring piece;

[0016] When the docking post penetrates the docking hole, the clamping groove is located outside one end of the second connecting flange close to the catalytic converter housing, and the clamping ring piece is sleeved on the outer sides of the two groups of docking posts through the notch groove and deflected and clamped into the inner side of the clamping groove to realize the position locking of the docking post, and then realize the pre-fixing of the first connecting flange and the docking post.

[0017] As a further solution of the present utility model: the reinforcement unit includes a mounting hole, a pressing ring piece, a sector-shaped clamping piece, a stud, and a nut;

[0018] The mounting hole is opened on one side of the first connecting flange and penetrates to the other side of the first connecting flange, the pressing ring piece is sleeved on the outer side of the catalytic converter housing, the sector-shaped clamping pieces are symmetrically fixed on both sides of the pressing ring piece, and the stud is fixed to one end of the sector-shaped clamping piece;

[0019] The pressing ring piece is attached to the clamping ring piece and is clamped into the inner side of the notch groove through the sector-shaped clamping piece, and the stud sequentially penetrates the docking hole and the mounting hole to one end of the first connecting flange close to the intake pipe to realize the rotational locking of the clamping ring piece;

[0020] The nut is threadedly connected to the stud to realize the fixed reinforcement of the first connecting flange and the docking post.

[0021] As a further solution of the present utility model: there are two groups of the mounting holes, the two groups of mounting holes are symmetrically distributed with the vertical center line of the first connecting flange as the center and the number is the same, and the mounting holes and the docking posts are arranged in a staggered manner;

[0022] The number of the docking holes matches the sum of the numbers of the docking posts and the clamping grooves, and the positions of the docking holes correspond one by one to the positions of the docking posts and the clamping grooves. The number and position of the stud bolts correspond one by one to the number and position of the mounting holes.

[0023] As a further solution of the present utility model: One end of the fan-shaped clamping piece protrudes from the end face of the crimping ring piece, and the protruding thickness of the fan-shaped clamping piece matches the thickness of the clamping ring piece. The outer wall size of the fan-shaped clamping piece matches the inner wall size of the notch groove.

[0024] Compared with the prior art, the beneficial effects of the present utility model are:

[0025] By providing the disassembly and assembly component, the rapid disassembly and assembly of the intake pipe and the catalytic converter housing can be realized. Through the detachable structure of the intake pipe, it is convenient to clean and replace the ceramic carrier inside the catalytic converter housing. The overall operation is simple and convenient, and the maintenance work efficiency of the three-way catalytic converter can be effectively improved. Description of the Drawings

[0026] Figure 1 is a structural schematic diagram of the present utility model;

[0027] Figure 2 is a structural schematic diagram of another perspective of the present utility model;

[0028] Figure 3 is a disassembly schematic diagram of the present utility model;

[0029] Figure 4 is a structural schematic diagram of the clamping ring piece and the crimping ring piece of the present utility model.

[0030] In the figure: 1. Three-way catalytic converter housing; 101. Catalytic converter housing; 102. Exhaust pipe; 103. Intake pipe; 2. Disassembly and assembly component; 201. First connection flange; 202. Docking post; 203. Clamping groove; 204. Mounting hole; 205. Second connection flange; 206. Docking hole; 207. Clamping ring piece; 208. Notch groove; 209. Crimping ring piece; 210. Fan-shaped clamping piece; 211. Stud bolt; 212. Nut. Detailed Embodiments

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0032] Please refer to Figures 1 to 4, in the embodiment of the present utility model, an air intake structure of a three-way catalytic converter includes a three-way catalytic converter housing 1 composed of a catalytic converter housing 101, an exhaust pipe 102, and an intake pipe 103. The exhaust pipe 102 is fixed to one end of the catalytic converter housing 101, and the intake pipe 103 is fixedly installed at the other end of the catalytic converter housing 101 through a disassembly and assembly component 2;

[0033] The disassembly and assembly component 2 includes a quick connection unit, a pre-fixing unit, and a reinforcement unit; the quick connection unit is used to realize the docking and assembly of the intake pipe 103 and the catalytic converter housing 101; the pre-fixing unit is used to realize the preliminary fixing of the quick connection unit; the reinforcement unit is used to further fix the quick connection unit and the pre-fixing unit to realize the stable connection between the intake pipe 103 and the catalytic converter housing 101;

[0034] The quick connection unit includes a first connection flange 201, a docking post 202, a second connection flange 205, and a docking hole 206;

[0035] The first connection flange 201 is fixed to one end of the intake pipe 103 close to the catalytic converter housing 101, the docking post 202 is fixed to one end of the first connection flange 201 close to the catalytic converter housing 101, the second connection flange 205 is fixed to one end of the catalytic converter housing (101 close to the intake pipe 103, and the docking hole 206 is opened on one side of the second connection flange 205 and penetrates to the other side of the docking hole 206;

[0036] There are two groups of docking posts 202, and the two groups of docking posts 202 are symmetrically distributed at the upper and lower ends of the first connection flange 201 with the horizontal center of the first connection flange 201, and the number of the two groups of docking posts 202 is different;

[0037] The first connection flange 201 realizes the positioning and splicing of the intake pipe 103 and the catalytic converter housing 101 through the docking post 202 penetrating the docking hole 206;

[0038] The pre-fixing unit includes a clamping groove 203, a clamping ring 207, and a notch groove 208;

[0039] The clamping grooves 203 are respectively opened on the upper and lower end faces of the two groups of docking posts 202, the clamping ring 207 is sleeved on the outside of the catalytic converter housing 101, and the notch grooves 208 are symmetrically opened on both sides of the clamping ring 207;

[0040] When the docking post 202 penetrates the docking hole 206, the clamping groove 203 is located outside one end of the second connection flange 205 close to the catalytic converter housing 101, and the clamping ring 207 is sleeved on the outside of the two groups of docking posts 202 through the notch groove 208 and deflects and snaps into the inside of the clamping groove 203 to realize the position locking of the docking post 202, and then realize the pre-fixing of the first connection flange 201 and the docking post 202;

[0041] The reinforcement unit includes a mounting hole 204, a crimping ring piece 209, a sector-shaped clamping piece 210, a stud 211, and a nut 212;

[0042] The mounting hole 204 is opened on one side of the first connecting flange 201 and penetrates through the other side of the first connecting flange 201. The crimping ring piece 209 is sleeved on the outer side of the catalytic converter housing 101. The sector-shaped clamping pieces 210 are symmetrically fixed on both sides of the crimping ring piece 209. The stud 211 is fixed at one end of the sector-shaped clamping piece 210;

[0043] The crimping ring piece 209 fits against the clamping ring piece 207 and is clamped inside the notch groove 208 through the sector-shaped clamping piece 210. The stud 211 sequentially penetrates through the docking hole 206 and the mounting hole 204 to the end of the first connecting flange 201 close to the intake pipe 103, so as to realize the rotational locking of the clamping ring piece 207;

[0044] The nut 212 is threadedly connected to the stud 211 to fix and reinforce the first connecting flange 201 and the docking column 202.

[0045] In this embodiment: When installing the intake pipe 103 and the catalytic converter housing 101, the operation steps are as follows:

[0046] First, hold the intake pipe 103 by hand and make the first connecting flange 201 and the second connecting flange 205 approach each other. Due to the structural settings of the two sets of docking columns 202 with different numbers, an anti-misassembly effect can be achieved, so that the first connecting flange 201 and the second connecting flange 205 can only be installed and docked at specific positions. In this way, the splicing angle between the intake pipe 103 and the catalytic converter housing 101 can be kept stable (it should be noted that: due to different vehicle layouts, the shape and orientation of the intake pipe 103 will also be set differently accordingly. Through the anti-misassembly structure of the docking column 202, the installation angle of the intake pipe 103 can be ensured to be the set angle);

[0047] After the docking column 202 penetrates through the corresponding docking hole 206, the clamping ring piece 207 can be moved closer to the second connecting flange 205 (it should be noted that: both the clamping ring piece 207 and the crimping ring piece 209 are sleeved on the outer side of the catalytic converter housing 101). At this time, the notch groove 208 on the clamping ring piece 207 is adjusted to align with the distribution area of the docking column 202, so that the clamping ring piece 207 can be sleeved on the outer sides of the two sets of docking columns 202 and fit against the end face of the second connecting flange 205. Then, rotate the clamping ring block 207 to misalign the notch groove 208 with the docking column 202, and at the same time, the clamping ring piece 207 is snapped into the clamping groove 203. In this way, the limit locking of the docking column 202 is realized, and at this time, the pre-fixation between the first connecting flange 201 and the second connecting flange 205 is achieved;

[0048] After that, move the crimping ring piece 209 towards the second connecting flange 205. At this time, align the sector-shaped clamping piece 210 with the notch groove 208 and align the stud 211 with the mounting hole 204. Finally, the stud 211 sequentially penetrates through the docking hole 206 and the mounting hole 204, and the sector-shaped clamping piece 210 is clamped inside the notch groove 208, so that the clamping ring block 207 cannot deflect;

[0049] Finally, thread the nut 212 onto the stud 211 and tighten it so that the nut 212 is in close contact with the end face of the first connecting flange 201. In this way, the connection between the first connecting flange 201 and the second connecting flange 205 is fixed. Through the cooperation of the above-mentioned multiple parts, the connection stability between the intake pipe 103 and the catalytic converter housing 101 can be effectively improved (it should be noted that corresponding seals are provided on the splicing surfaces of the first connecting flange 201 and the second connecting flange 202);

[0050] Through the detachable structure of the intake pipe 103, it is convenient to clean and replace the ceramic carrier inside the catalytic converter housing 101. The overall operation is simple and convenient, and the maintenance work efficiency of the three-way catalytic converter can be effectively improved.

[0051] Please refer specifically to Figures 1 to 4 , there are two groups of mounting holes 204. The two groups of mounting holes 204 are symmetrically distributed with the vertical center line of the first connecting flange 201 as the center and have the same quantity. The mounting holes 204 are misaligned with the docking posts 202;

[0052] The quantity of the docking holes 206 matches the total quantity of the docking posts 202 and the clamping grooves 203, and the positions of the docking holes 206 correspond one by one to the positions of the docking posts 202 and the clamping grooves 203. The quantity and position of the studs 211 correspond one by one to the quantity and position of the mounting holes 204.

[0053] In this embodiment: By using two groups of docking posts 202 with different quantities, the alignment operation of the docking holes 206 with the corresponding docking holes 206 can also be achieved, so as to realize the rapid splicing operation of the intake pipe 103 and the catalytic converter housing 101.

[0054] Please refer specifically to Figures 1 to 4 , one end of the sector-shaped clamping piece 210 protrudes from the end face of the crimping ring piece 209, and the protruding thickness of the sector-shaped clamping piece 210 matches the thickness of the clamping ring block 207. The outer wall dimension of the sector-shaped clamping piece 210 matches the inner wall dimension of the notch groove 208.

[0055] In this embodiment: Through the above structure, the stable locking of the clamping ring block 207 can be achieved. It should also be noted that the horizontal length of the clamping groove 203 protruding outside the second connecting flange 205 matches the thickness of the clamping ring block 207, thus ensuring the close fit between the first connecting flange 201 and the second connecting flange 205.

[0056] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, making equivalent substitutions or changes, shall be covered by the protection scope of the present utility model.

Claims

1. An air intake structure of a three-way catalytic converter, comprising a three-way catalytic converter housing (1) consisting of a catalytic converter housing (101), an exhaust pipe (102), and an air intake pipe (103), wherein the exhaust pipe (102) is fixed to one end of the catalytic converter housing (101), and characterized in that: The air intake pipe (103) is fixedly mounted on the other end of the catalyst housing (101) via a disassembly assembly component (2); The disassembly and assembly component (2) comprises a quick-connect unit, a pre-fixing unit, and a reinforcement unit; The quick-connect unit is used to achieve docking and assembly of the air intake pipe (103) and the catalyst housing (101); The pre-fixing unit is used to achieve preliminary fixation of the quick-connect unit; The reinforcement unit is used to further fix the quick-connect unit and the pre-fixing unit, thereby achieving a stable connection between the air intake pipe (103) and the catalyst housing (101).

2. The intake structure of a three-way catalytic converter according to claim 1, characterized in that: The quick-connect unit comprises a first connecting flange (201), a docking column (202), a second connecting flange (205), and a docking hole (206); The first connecting flange (201) is fixed to one end of the air intake pipe (103) close to the catalyst housing (101), the docking column (202) is fixed to one end of the first connecting flange (201) close to the catalyst housing (101), the second connecting flange (205) is fixed to one end of the catalyst housing (101) close to the air intake pipe (103), and the docking hole (206) is opened on one side of the second connecting flange (205) and penetrates to the other side of the docking hole (206); The docking posts (202) are provided in two groups, and the two groups of docking posts (202) are symmetrically distributed at the upper and lower ends of the first connecting flange (201) with respect to the horizontal center of the first connecting flange (201), and the numbers of the two groups of docking posts (202) are different; The first connection flange (201) penetrates the docking hole (206) via the docking column (202) to achieve positioning and splicing of the intake pipe (103) and the catalyst housing (101).

3. The intake structure of a three-way catalytic converter according to claim 2, characterized in that: The pre-fixing unit comprises a snap-fit ​​groove (203), a snap-fit ​​ring sheet (207), and a notched groove (208); The clamping grooves (203) are respectively formed on the upper and lower end surfaces of the two groups of docking columns (202); the clamping ring sheet (207) is sleeved on the outside of the catalyst housing (101); and the notch grooves (208) are symmetrically formed on both sides of the clamping ring sheet (207); When the docking column (202) passes through the docking hole (206), the snap-in groove (203) is located outside one end of the second connecting flange (205) close to the catalyst housing (101), and the snap-in ring sheet (207) is sleeved on the outside of the two groups of docking columns (202) through the notch groove (208) and deflected to snap into the inside of the snap-in groove (203), so as to realize the position locking of the docking column (202), and then realize the pre-fixation of the first connecting flange (201) and the docking column (202).

4. The intake structure of a three-way catalytic converter according to claim 3, characterized in that: The reinforcement unit comprises a mounting hole (204), a crimping ring sheet (209), a fan-shaped clamping sheet (210), a stud (211), and a nut (212); The mounting hole (204) is opened on one side of the first connecting flange (201) and passes through the other side of the first connecting flange (201); the crimping ring (209) is sleeved on the outside of the catalyst housing (101); the fan-shaped clamping piece (210) is symmetrically fixed on both sides of the crimping ring (209); and the stud (211) is fixed on one end of the fan-shaped clamping piece (210); The crimping ring sheet (209) is fitted to the snap ring sheet (207) and snapped to the inner side of the notch groove (208) through the fan-shaped snap-in sheet (210), and is passed through the docking hole (206) and the mounting hole (204) in sequence to the end of the first connecting flange (201) close to the air intake pipe (103) through the stud (211), so as to realize the rotation locking of the snap ring sheet (207); The nut (212) is threadedly connected to the stud (211) to achieve the fixation and reinforcement of the first connecting flange (201) and the docking column (202).

5. The intake structure of a three-way catalytic converter according to claim 4, characterized in that: The mounting holes (204) are provided in two groups, the two groups of mounting holes (204) are symmetrically distributed with the vertical center line of the first connecting flange (201) as the center and the number is the same, and the mounting holes (204) and the docking column (202) are staggered. The number of the docking holes (206) matches the total number of the docking posts (202) and the snap-in slots (203), and the positions of the docking holes (206) correspond one-to-one with the positions of the docking posts (202) and the snap-in slots (203), and the number and positions of the studs (211) correspond one-to-one with the number and positions of the mounting holes (204).

6. The intake structure of a three-way catalytic converter according to claim 4, characterized in that: One end of the fan-shaped clamping piece (210) protrudes from the end surface of the crimping ring piece (209) and the protruding thickness of the fan-shaped clamping piece (210) matches the thickness of the clamping ring piece (207), and the outer wall size of the fan-shaped clamping piece (210) matches the inner wall size of the notch groove (208).

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