CN212250206U - External member connection structure of exhaust gas purification device - Google Patents

Abstract

The utility model provides an exhaust purification device's external component connection structure. An L-shaped bracket is arranged on the cylinder, and the connecting part of the bracket is parallel or nearly parallel to the axis of the cylinder. Therefore, even if the position of the bracket changes with the change in the shape of the cylinder, the plane of the connecting portion of the bracket is difficult to change, and an external member such as a heat insulating plate or a pressure sensor pipe can be connected to the cylinder of the exhaust gas purification apparatus.

Description

External member connection structure of exhaust gas purification device

Technical Field

The present invention relates to a connection structure, and more particularly, to a connection structure for connecting an external exhaust component to a cylinder of an exhaust gas purification apparatus.

Background

The pollutants in the exhaust gas of automobiles mainly comprise carbon monoxide (CO), hydrocarbon (HCx), nitrogen oxide (NOx), Particulate Matter (PM) and the like, and pose a threat to the environment and human health. In order to protect the environment, many emission regulations are continuously issued.

An automobile exhaust system is generally composed of an exhaust manifold, an exhaust pipe, a catalytic converter, an exhaust temperature sensor, an automobile muffler, a tail pipe, and the like. In which a catalytic converter treats exhaust gas and then discharges it out of an automobile, thereby eliminating a large amount of pollutants.

In order to meet recently implemented emission regulations, the catalyst of the catalytic converter is beginning to adopt a Filter-like structure such as GPF (Gasoline Particulate Filter). In the case of a filter-like structure, the exhaust pressure is higher than in the case of a conventional honeycomb structure, and more firm holding is required. In the conventional shrinkage (shrink) method, the strength of the catalyst carrier is set to a conventional range, the deviation between the catalyst and the holder is measured, and the catalyst is canned (canned) for each diameter.

SUMMERY OF THE UTILITY MODEL

Problem to be solved by utility model

Since the catalyst and the holder are displaced, the shape of the cylinder may be changed after the cylinder is processed by the same shrinkage process, and the diameter of some portions of the cylinder may be varied.

As shown in fig. 6, in the case of attaching the heat insulating plate 32 to the tubular body 31, it is necessary to provide a bracket 33 for connecting the heat insulating plate 32 to the tubular body 31 on the tubular body 31, but as shown by a dotted line in fig. 6, when the diameter of the tubular body 31 changes, the bracket 33 is displaced by the change in the diameter of the tubular body, and the connecting position of the heat insulating plate 32 and the bracket 33 is also displaced. In this case, if the heat insulating board 32 is forcibly attached to the bracket 33, the heat insulating board 32 is deformed or damaged. In addition, the position of the heat insulating board 32 may not be determined due to the positional deviation of the bracket 33, and the heat insulating board 32 may not be connected.

Further, as shown in fig. 7, when the pressure sensor pipe 42 is attached to the cylindrical body 41, the gas that the pressure sensor itself contacts must be sufficiently cooled from the exhaust gas temperature, and therefore, it is necessary to secure a certain length of the pipe 42. The longer the duct 42, the more likely the root of the duct 42 is damaged by the influence of vibration of the engine or the vehicle body.

Therefore, as shown in fig. 7, a holder 43 for connecting the pipe is provided on the cylindrical body 41 in which the catalyst is placed, and specifically, the pipe 42 is connected to the holder 43 by a clamp 45. In this case, since the catalyst and the holder are displaced, after the cylindrical body is processed by the same shrinkage process, the shape of the cylindrical body may be changed, and the diameter of some portions of the cylindrical body may be varied, so that the holder 43 may be displaced due to the change in the shape of the cylindrical body, and the connection position between the pipe 42 and the holder 43 may be displaced. In this case, if the pipe 42 is forcibly connected to the bracket 43, stress is applied to the pipe when the pipe is connected, and the pipe is easily broken at the root.

Therefore, an object of the present invention is to provide a connection structure capable of connecting an external exhaust member to a cylinder of an exhaust gas purification apparatus even if the shape of the cylinder of the exhaust gas purification apparatus changes.

Means for solving the problems

The utility model provides an exhaust gas purification device's external component connection structure, a serial communication port, this exhaust gas purification device includes the barrel the surface butt fusion of barrel has the cross-section to be the connecting element of L word form, and external component with the help of connecting element connect in the surface of barrel, connecting element at one end have with the surface butt fusion's of barrel butt fusion portion has from the tip of this butt fusion portion stand up and to keeping away from the outstanding connecting portion of direction of barrel, external component connect in connecting element the connecting portion.

Preferably, the axis of the barrel lies in the plane of the connection.

Preferably, there are at least two of the connecting members, wherein two of the connecting members are disposed at a distance of 180 degrees in the circumferential direction of the cylinder, and the connecting portions of the two connecting members are coplanar.

Preferably, a long hole extending in a radial direction of the cylinder is formed at the connection member or the outer member.

Preferably, the exterior member is a heat insulating panel including: a main body portion formed in a substantially semicircular shape in cross section; and a connection receiving portion that protrudes in a direction away from the cylindrical body at both ends of the main body portion and is connected to the connection portion, wherein the external component is connected to the connection member with a space between the external component and an outer surface of the cylindrical body.

Preferably, a part of the main body of the exterior member is more bulged in a direction away from the cylindrical body than a part adjacent thereto.

Preferably, a portion of the main body of the outer member facing the weld portion bulges further away from the cylindrical body than a portion adjacent to the weld portion.

Preferably, the external component is a pressure sensor pipe connected to the connection member.

Preferably, the exhaust gas purifying device is a catalytic converter.

Effect of the utility model

According to the present invention, even if the position of the holder changes with the shape of the cylinder, the external member can be connected to the cylinder of the exhaust gas purification apparatus.

Drawings

Fig. 1 is a schematic diagram showing a catalytic converter as an example of an exhaust gas purifying apparatus according to the present invention.

Fig. 2 is a cross-sectional view taken along line a-a of fig. 1, showing embodiment 1 of the present invention.

Fig. 3 is a cross-sectional view taken along line a-a of fig. 1 showing embodiment 1 of the present invention.

Fig. 4 is a schematic diagram for explaining the long hole.

Fig. 5 is a perspective view showing embodiment 2 of the present invention.

Fig. 6 is a schematic diagram showing conventional example 1.

Fig. 7 is a perspective view showing conventional example 2.

Description of the reference numerals

100a, 31, 41, cylinder; 100b, 100c, a tapered portion; 2-1, 2-2, 32 and a heat insulation plate; 21. a main body portion; 22. a connected portion; 12. 42, a pressure sensor pipe; 3. 13, 33, 43, a bracket; 4. 14, a connecting part; 5. a fusion part; 15. 45, a clamping piece.

Detailed Description

Various exemplary embodiments, features and aspects of the present invention will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present invention. It will be understood by those skilled in the art that the present invention may be practiced without some of these specific details. In some instances, methods, instrumentalities well known to those skilled in the art have not been described in detail in order to not unnecessarily obscure the present invention.

The exhaust gas purifying apparatus of the present invention will be described by taking a catalytic converter as an example. Of course, the exhaust gas purification apparatus of the present invention may have a structure other than the catalytic converter.

The catalytic converter is an external purification device installed in an automobile exhaust system, a cylinder of the catalytic converter 100 can be made of stainless steel and other materials, a catalyst is arranged in the cylinder, and harmful gases such as carbon monoxide, hydrocarbons, nitrogen oxides and the like discharged by automobile exhaust can be converted into harmless carbon dioxide, water and nitrogen through oxidation-reduction. In addition, the catalyst of the catalytic converter adopts a Filter-like structure such as GPF (Gasoline Particulate Filter), which effectively reduces the emission of Particulate matter.

As shown in fig. 1, the catalytic converter 100 has a cylindrical body 100a and tapered portions 100b, 100c at both ends of the cylindrical body 100 a. The cylinder 100a contains a catalyst. The exhaust gas is introduced from the opening of the tapered portion 100b at one end of the cylindrical body 100a, purified by the catalyst, and then discharged from the tapered portion 100c at the other end.

Since the catalyst and the holder are displaced, after the catalyst-containing cylindrical body 100a of the catalytic converter 100 is processed by the same shrinkage process, the shape of the cylindrical body 100a may be changed, and the diameter of some portions of the cylindrical body 100a may be varied.

Example 1

As shown in FIG. 2, as an example of the exterior member, heat insulating plates 2-1, 2-2 are provided outside the catalytic converter 100. The heat-insulating boards 2-1, 2-2 have: a main body 21 formed in a substantially semicircular shape in cross section; and connected portions 22 protruding in a direction away from the cylindrical body 100a at both ends of the main body portion 21 and connected to the bracket 3 serving as a connecting member provided in the cylindrical body 100 a. For example, the connected portion 22 may protrude in a direction away from the cylinder 100a in a diameter direction of the cylinder 100a (i.e., protrude outward in a radial direction of the cylinder 100 a).

As shown in fig. 2, the holder 3 provided on the cylindrical body 100a is formed in an L shape, and has a fusion-bonded portion 5 fused to the outer surface of the cylindrical body 100a at one end, and a connection portion 4 rising from the end of the fusion-bonded portion 5 and protruding in a direction away from the cylindrical body 100a at the other end.

In the example shown in fig. 2, two connecting members 3 are provided at 180 degrees apart in the circumferential direction of the cylinder 100a, and the connecting portions 4 of the two connecting members 3 are coplanar. However, the number of the connecting members 3 is not limited to this, and one or three or more connecting members 3 may be provided.

Preferably, the axis O of the cylinder 100a lies in the plane of the connection 4. It is within the scope of the present invention that the axis O of the cylinder 100a is parallel to the plane of the connecting portion 4, wherein the closer the axis O of the cylinder 100a is to the plane of the connecting portion 4, the more preferable. In addition, the case where the axis O of the cylinder 100a intersects the plane of the connecting portion 4 at a small angle (close to 0 degrees) is also included in the scope of the present invention.

Thus, even when the shape of the cylindrical body 100a is changed, the connected portions 22 of the heat insulating boards 2-1, 2-2 can be connected to the connecting portions 4 of the brackets 3 without deforming the heat insulating boards 2-1, 2-2.

For example, when the holder 3 is changed in shape of the cylindrical body 100a as shown by an arrow B in fig. 2, the position of the connecting portion 4 of the holder 3 in the circumferential direction with respect to the axis O of the cylindrical body 100a is changed, but the connection between the connected portion 22 of the heat insulating boards 2-1 and 2-2 and the connecting portion 4 of the holder 3 is not affected. That is, since the connection portion 4 protrudes in a direction away from the cylindrical body 100a, the connection portion of the heat-insulating plates 2-1, 2-2 and the bracket 3 is adjustable, and the connected portion 22 and the connection portion 4 can be connected without deformation of the heat-insulating plates 2-1, 2-2.

Further, for example, when the holder 3 is changed as shown by an arrow C in fig. 3 due to a change in the shape of the cylindrical body 100a, the position of the connecting portion 4 of the holder 3 in the radial direction with respect to the axis O of the cylindrical body 100a is changed, but the connection between the connected portion 22 of the heat insulating plates 2-1, 2-2 and the connecting portion 4 of the holder 3 is not affected. That is, since the connection part 4 protrudes in a direction away from the cylinder 100a, the connection part of the heat insulation plates 2-1, 2-2 and the bracket 3 is adjustable, and the connected part 22 and the connection part 4 can be connected without deformation of the heat insulation plates 2-1, 2-2.

Thus, even if the shape of the cylindrical body 100a is changed, the heat insulating panels 2-1 and 2-2 can be assembled because the heat insulating panels 2-1 and 2-2 are connected to the connecting portions 4 of the brackets 3 formed in the L shape protruding in a direction away from the cylindrical body 100a when the heat insulating panels 2-1 and 2-2 are assembled.

The method of joining the heat insulating boards 2-1, 2-2 to the bracket 3 can be appropriately selected according to the actual situation. For example, the heat insulating boards 2-1 and 2-2 may be joined to the bracket 3 not only by spot welding, but also by other methods such as a bolt-joining method (for example, as shown in fig. 4) in which a long hole is formed in the bracket or the heat insulating board, a caulking method called TOX or Tog-lock, laser welding, plug welding (plug weld) by Mig welding (Melt-gas welding), and Tig welding (Tungsten welding-gas welding).

As for the bolt fastening method for forming the long hole in the bracket or the heat shield plate, for example, as shown in FIG. 4, a long hole a is formed in the connecting portion 4 of the bracket 3, and a circular hole b is formed in the connected portion 22 of the heat shield plates 2-1, 2-2. When the holder 3 is provided to the cylindrical body 100a, the long axis of the elongated hole a extends in the radial direction of the cylindrical body 100 a. The connection of the bracket 3 and the heat insulation plates 2-1, 2-2 is achieved by passing bolts through the elongated holes a and the circular holes b.

Thus, the elongated hole a absorbs the positional variation of the bracket 3 due to the change in the shape of the tubular body 100a, and the connected portion 22 and the connecting portion 4 can be easily connected without deformation of the heat insulating boards 2-1 and 2-2. Further, at least one of the holder 3 and the heat insulating plates 2-1 and 2-2 may be formed with a long hole extending in the radial direction of the barrel 100 a.

As shown in fig. 2, the heat insulating panels 2-1, 2-2 have a portion K1 facing the welding portion 5 of the bracket 3 bulging more than its adjacent portion in accordance with the thickness of the welding portion 5, thereby ensuring a heat insulating space at the portion facing the welding portion 5 of the bracket 3.

Further, the main body 21 of the heat insulating panels 2-1 and 2-2 has a part K2 bulging in a direction away from the cylindrical body 100a than its adjacent part, thereby increasing the strength of the heat insulating panels 2-1 and 2-2.

According to the utility model discloses an embodiment 1 can connect the heat insulating board under the unchangeable condition in its position and/or shape at barrel 100a, consequently, can prevent to exert great connecting stress to the heat insulating board when connecting the heat insulating board, can restrain the deviation of intensity.

In addition, in the case where the heat insulating plate is not set on the cylindrical body, the thickness of the heat insulating plate needs to be increased in order to suppress resonance, but by providing the L-shaped bracket on the cylindrical body, the thickness of the heat insulating plate can be suppressed to the minimum, which is advantageous for weight reduction and reduction in component cost.

Example 2

As described above, since the catalyst and the holder are offset, after the catalyst-containing cylindrical body 100a of the catalytic converter 100 is processed by the same shrink process, the shape of the cylindrical body 100a may change, and the diameter dimensions of some portions of the cylindrical body 100a may vary. As another example of the external member, as shown in fig. 5, a pressure sensor pipe 12 may be provided outside the cylindrical body 100 a. Only the cylinder 100a is changed during the process, and the pipe 12 to be connected does not change with the change in the diameter of the cylinder 100 a.

The cylindrical body 100a is provided with an L-shaped bracket 13 as a connecting member, and the pressure sensor pipe 12 is connected to the bracket 13 via a clamp 15. In this case, the clip 15 may be regarded as a part of the external member.

As in embodiment 1, it is preferable that the axis of the cylinder 100a is located in the plane of the connecting portion 14 of the holder 13. It is within the scope of the present invention for the axis O of the cylinder 100a to be parallel to the plane of the connecting portion 14, wherein the closer the axis O of the cylinder 100a is to the plane of the connecting portion 14, the more preferable. In addition, the case where the axis of the cylinder 100a intersects the plane of the connecting portion 14 at a small angle (close to 0 degrees) is also included in the scope of the present invention.

Thus, even when the shape of the tubular body 100a changes, excessive pressure does not occur at the root of the duct 12, and cracking or breakage does not occur, and the function of the duct 12 can be ensured.

As in embodiment 1, an appropriate method of joining the holder 15 and the bracket 13 can be selected according to the actual situation. For example, the joining may be performed not only by spot welding, but also by a bolt fastening method in which a long hole is formed in the bracket or the holder, a caulking method called TOX or Tog-lock, laser welding, plug welding (plug weld) using Mig welding (Melt-gas welding) or Tig welding (Tungsten-insert-gas welding), or the like.

In the case of the bolt fastening method, at least one of the clamp 15 and the bracket 13 is formed with a long hole along the radial direction of the cylindrical body 100a, thereby absorbing the change in shape of the cylindrical body 100 a. Therefore, the pipe 12 can be connected without being affected by the change in the shape of the cylinder 100 a.

When the pipe connection position is displaced due to a change in the cylinder, excessive stress is generated at the root of the pipe, and the pipe is cracked or broken, so that the function cannot be ensured. However, according to embodiment 2 of the present invention, the assembly can be performed without generating stress at the root, and the function can be ensured.

As described above, in the present invention, the L-shaped holder is provided to the cylinder, and the axis of the cylinder is located in the plane of the connecting portion of the holder.

When the heat insulating plate is attached to the cylindrical body, the heat insulating plate and the holder of the cylindrical body are joined to each other in an opposed manner. A long hole along the radial direction of the cylinder is formed on any one of the heat insulation plate and the bracket.

When the pressure sensor is attached to the cylinder, the clamp and the bracket for connecting the pipes are formed with long holes in either the bracket or the clamp to absorb the change in shape of the cylinder.

According to the technical scheme of the utility model, the axis of connecting portion and barrel is roughly parallel, therefore, under the condition of the shape change of barrel, though the support position changes along with the shape change of barrel, the position of being connected of external parts such as heat insulating board or pressure sensor and support is adjustable, consequently can be connected external parts to the barrel of exhaust purification device such as catalytic converter under the condition that the position and/or the shape of external parts do not take place to warp.

The above embodiments are merely illustrative, and are not intended to limit the present invention. Those skilled in the art can make various changes according to the technical idea of the present invention, and such changes also belong to the protection scope of the present invention.

Industrial applicability

The utility model discloses can provide a connection structure that even the shape change of exhaust gas purification device's barrel also can connect external component in exhaust gas purification device's barrel.

Claims (9)

1. An external member connection structure of an exhaust gas purification apparatus,

the exhaust gas purification device (100) comprises a cylinder (100a), connecting members (3, 13) with L-shaped cross sections are welded on the outer surface of the cylinder (100a),

an external part is connected to the outer surface of the cylinder (100a) by means of the connecting member (3, 13),

the connecting members (3, 13) have a weld portion (5) welded to the outer surface of the cylindrical body (100a) at one end portion and have connecting portions (4, 14) rising from the end portion of the weld portion and projecting in a direction away from the cylindrical body (100a) at the other end portion,

the external part is connected to the connecting portion (4, 14) of the connecting member (3, 13).

2. The external member connection structure of an exhaust gas purification device according to claim 1,

the axis of the cylinder (100a) is located in the plane of the connection.

3. The external member connection structure of an exhaust gas purification device according to claim 1,

the connecting members (3) are at least two, wherein two connecting members (3) are arranged at 180 degrees in the circumferential direction of the cylinder (100a), and the connecting parts (4) of the two connecting members (3) are coplanar.

4. The external member connection structure of an exhaust gas purification device according to claim 1,

an elongated hole (a) extending in the radial direction of the cylinder (100a) is formed in the connecting member (3, 13) or the outer member.

5. The external member connection structure of an exhaust gas purification device according to claim 1,

the exterior part is a heat insulation board (2-1, 2-2), and the heat insulation board (2-1, 2-2) includes:

a main body (21) formed in a substantially semicircular shape in cross section; and

a connected part (22) which protrudes in a direction away from the cylindrical body (100a) at both ends of the main body part and is connected to the connecting part (4),

the outer member is connected to the connection member (3) with a space from the outer surface of the cylinder (100 a).

6. The external member connection structure of an exhaust gas purification device according to claim 5,

the main body (21) of the outer member has parts (K1, K2) that bulge out further from the cylindrical body (100a) than adjacent parts.

7. The external member connection structure of an exhaust gas purification device according to claim 6,

a portion (K1) of the main body portion (21) of the exterior member, which portion faces the weld (5), bulges further away from the cylindrical body (100a) than the portion adjacent thereto.

8. The external member connection structure of an exhaust gas purification device according to claim 1,

the external component is a pressure sensor pipe (12) connected to the connecting member (13).

9. The external member connection structure of an exhaust gas purification device according to claim 1,

the exhaust gas purification device (100) is a catalytic converter.

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