JP2021001548A - Plate-like member positioning structure, passage device, and plate-like member positioning method - Google Patents

Abstract

To provide a plate-like member positioning structure which enables improvement of positioning accuracy of a plate-like member and improvement of assembly workability, and to provide a passage device and a plate-like positioning method.SOLUTION: A plate-like member positioning structure includes: a wall part forming a housing and having slits; and protruding parts which are provided at a side edge part of the plate-like member and fit in the slits so as to restrict movement of the plate-like member in a direction orthogonal to a penetration direction of the slits. For example, the plate-like member positioning structure further includes recessed parts which are provided at the side edge part and contact with the wall part so as to restrict movement of the plate-like member in the penetration direction of the slits.SELECTED DRAWING: Figure 5

Description

The present disclosure relates to a plate-shaped member positioning structure, a flow path device, and a plate-shaped member positioning method.

Conventionally, there is an exhaust gas purification device in which a converter in which an oxidation catalyst and a filter are stored and a converter in which an SCR catalyst (selective reduction catalyst) is stored are connected via a mixer chamber or a communication pipe.

Further, a partition plate (plate-shaped member) for partitioning the internal space of a mixer chamber or a converter is known.

For example, when fixing the partition plate to the mixer chamber or the like, first, the inner wall portion of the mixer chamber or the like is embossed, and the end portion of the partition plate is brought into contact with the convex portion formed by the embossing process. As a result, the partition plate is positioned with respect to the inner wall portion.

Next, the boundary portion between the partition plate and the inner wall portion is welded. As a result, the partition plate is fixed to the inner wall portion.

For example, Patent Document 1 discloses a converter including a partition plate.

JP-A-2009-156066

However, when the partition plate (plate-shaped member) is brought into contact with the convex portion formed by the embossing process, the positional deviation of the partition plate with respect to the inner wall portion cannot be sufficiently limited, so that the positioning accuracy of the partition plate with respect to the inner wall portion is lowered. In some cases.

In addition, the partition plate may be misaligned during welding. In particular, when the partition plate is a plate-shaped member made of a metal material and has a curved shape by bending, a force that deforms in the direction returning from the curvature acts due to the tensile strength of the partition plate itself. Misalignment occurs. If the partition plate is welded in a misaligned state, individual differences or variations in the exhaust purification device may occur. In this case, the exhaust flow may differ from the intended state.

When a jig is attached to the partition plate so that the partition plate does not shift during welding, for example, the movement range of the welding torch tip is limited due to interference between the jig and the tip of the welding torch. , There is a risk that some parts cannot be welded. If there is a part that cannot be welded due to the mounting of the jig, temporary welding is performed with the jig mounted on the partition plate, and after removing the jig from the partition plate, main welding is performed. However, since it is necessary to perform temporary welding before the main welding, there is a problem that the assembly workability is lowered.

An object of the present disclosure is to provide a positioning structure for a plate-shaped member, a flow path device, and a positioning method for the plate-shaped member, which can improve the positioning accuracy of the plate-shaped member and improve the assembling workability. is there.

In order to achieve the above object, the positioning structure of the plate-shaped member in the present disclosure is
It is a positioning structure of plate-shaped members arranged in the housing.
A wall portion that constitutes the housing and has a slit,
A convex portion provided on the edge portion of the plate-shaped member and fitted to the slit so as to limit the movement of the plate-shaped member in a direction orthogonal to the penetrating direction of the slit.
To be equipped.

Further, the flow path device in the present disclosure includes the positioning structure of the plate-shaped member, and the flow path is provided inside the housing.

Further, the method for positioning the plate-shaped member in the present disclosure is as follows.
It is a method of positioning plate-shaped members arranged in a housing.
By fitting the convex portion provided on the edge portion of the plate-shaped member into the slit provided on the wall portion of the housing, the direction in which the plate-shaped member is orthogonal to the penetrating direction of the slit. Restrict movement to.

According to the present disclosure, it is possible to improve the positioning accuracy of the plate-shaped member and improve the assembling workability.

FIG. 1 is a diagram schematically showing an exhaust gas purification device according to an embodiment of the present disclosure. FIG. 2 is a diagram schematically showing a cross section taken along line AA of FIG. FIG. 3 is an arrow view in the + X direction in FIG. 1 of the plate-shaped member. FIG. 4 is an arrow view in the + Y direction in FIG. 3 of the plate-shaped member. FIG. 5 is a + X direction arrow view showing the mixer chamber and the plate-shaped member. FIG. 6 is an arrow view in the −Z direction of FIG. FIG. 7 is a view in the + Y direction of FIG.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In the present embodiment, an example of the positioning structure of the plate-shaped member 50 applied to the exhaust gas purification device 1 as the flow path device will be described. FIG. 1 is a diagram schematically showing an exhaust gas purification device 1 according to an embodiment of the present disclosure. In FIG. 1, the X-axis, the Y-axis, and the Z-axis are drawn. In FIG. 1, the left-right direction is referred to as the X direction, the right direction is referred to as "+ X direction", "+ X side" or "right side", and the left direction is referred to as "-X direction", "-X side" or "left side". Further, in FIG. 1, the vertical direction is referred to as the Y direction, the upward direction is referred to as "+ Y direction" or "upper side", and the lower direction is referred to as "-Y direction" or "lower side". Further, the depth direction on the paper surface of FIG. 1 is referred to as the Z direction, the front direction is referred to as "+ Z direction" or "+ Z side", and the back direction is referred to as "-Z direction" or "-Z side".

First, the exhaust gas purification device 1 will be described with reference to FIG. As shown in FIG. 1, the exhaust purification device 1 includes a diesel engine 10 (engine), which is an internal combustion engine, a connecting pipe 11 for leading out gas discharged from the engine 10, and a pre-stage oxidation catalyst 31 (in order from the upstream side). A pre-stage post-treatment device 12 having a pre-stage DOC) and a diesel particulate filter 32 (DPF), a mixer chamber 13 arranged at approximately 90 degrees in the longitudinal direction with respect to the pre-stage post-treatment device 12, and an exhaust pipe 14. A post-stage post-treatment device 15 having a selective reduction NOx catalyst 33 (SCR) and a post-stage oxidation catalyst 34 (post-stage DOC), and a urea water injection means 16 (reducing agent supply means) are provided.

The upstream side of the connecting pipe 11 is connected to the exhaust manifold of the engine 10. The downstream side of the connecting pipe 11 is connected to the pre-stage post-processing device 12.

The pre-stage DOC 31 oxidizes HC and CO in the exhaust gas. In addition, nitric oxide (NO) is oxidized to NO ₂ in order to activate SCR33.

The DPF 32 collects particulate matter (PM) in the exhaust gas. Further, the DPF 32 burns and removes the accumulated PM by supplying fuel to the front stage DOC 31 by the exhaust injection of the injection in the exhaust pipe or the post injection of the engine 10 and raising the temperature of the exhaust gas by the oxidation reaction of the front stage DOC 31. ..

The SCR 33 promotes the reduction reaction of NOx contained in the exhaust gas flowing from the exhaust pipe 14. Specifically, the urea water injected from the urea water injection means 16 is hydrolyzed by the exhaust gas to be produced as ammonia. The SCR33 adsorbs the generated ammonia, and reduces and purifies NOx with the adsorbed ammonia when the exhaust gas passes through the SCR33.

The latter DOC34 is arranged on the downstream side of the SCR33. When the excess ammonia slips from the SCR33, the subsequent DOC34 oxidizes and removes the excess ammonia from the exhaust gas.

The mixer chamber 13 is formed in the shape of a gourd-shaped cross section having a predetermined space. The mixer chamber 13 comprises a front chamber portion 13a connected to the downstream side of the front stage post-processing device 12, a rear chamber chamber portion 13b connected to the upstream side of the exhaust pipe 14, a communication portion 13c, and a plate-shaped member 50. Be prepared.

The urea water injection means 16 is attached to the right wall surface of the rear chamber portion 13b. The injection shaft of the urea water injection means 16 is aligned with the axis of the exhaust pipe 14. Urea water is injected (sprayed) from the urea water injection means 16 to the downstream side of the exhaust pipe 14.

FIG. 2 is a diagram schematically showing a cross section taken along line AA of FIG. As shown in FIGS. 1 and 2, the front chamber portion 13a has a front peripheral wall portion 131a and a front bottom wall portion 132a. The front peripheral wall portion 131a has a circular outer peripheral shape. The front stage peripheral wall portion 131a is connected to the downstream side of the front stage post-processing device 12. The front bottom wall portion 132a is arranged on the right side of the front peripheral wall portion 131a. The front bottom wall portion 132a has a circular outer peripheral edge. The outer peripheral edge of the front bottom wall portion 132a and the right edge of the front stage peripheral wall portion 131a are continuous.

The rear chamber portion 13b is arranged in the upward direction (+ Y direction) of the front chamber portion 13a. The rear chamber portion 13b has a rear peripheral wall portion 131b, a rear right bottom wall portion 132b, and a rear left bottom wall portion 133b (see FIG. 1). The rear peripheral wall portion 131b has a circular outer peripheral shape. The outer peripheral shape of the rear peripheral wall portion 131b is smaller than the outer peripheral shape of the front peripheral wall portion 131a. The rear right bottom wall portion 132b is arranged on the right side of the rear peripheral wall portion 131b. The rear right bottom wall portion 132b has a circular outer peripheral edge. The outer peripheral edge of the rear right bottom wall portion 132b and the right edge of the rear peripheral peripheral wall portion 131b are continuous. The rear left bottom wall portion 133b is arranged on the left side of the rear peripheral wall portion 131b. The rear left bottom wall portion 133b has a circular outer peripheral edge. As shown in FIG. 1, the outer peripheral edge of the rear left bottom wall portion 133b and the left edge of the rear peripheral wall portion 131b are continuous. The rear left bottom wall portion 133b is connected to the exhaust pipe 14.

As shown in FIG. 2, the communication portion 13c communicates the front chamber portion 13a and the rear chamber portion 13b. The communication portion 13c leads the exhaust gas from the front chamber portion 13a to the rear chamber portion 13b. The front chamber portion 13a, the rear chamber portion 13b, and the communication portion 13c are integrally formed.

The front peripheral wall portion 131a and the front bottom wall portion 132a in the front chamber portion 13a, the rear peripheral wall portion 131b in the rear chamber portion 13b, the rear right bottom wall portion 132b and the rear left bottom wall portion 133b, and the communication portion 13c are the mixer chamber 13 40 (corresponding to the “housing” of the present disclosure) is configured.

The plate-shaped member 50 causes a swirling flow in the exhaust gas in the rear chamber portion 13b.

Next, the positioning structure 100 of the plate-shaped member 50 in the present embodiment will be described with reference to FIGS. 1 to 4. FIG. 3 is an arrow view in the + X direction in FIG. 1 of the plate-shaped member 50. FIG. 4 is a view of the plate-shaped member 50 in the + Y direction in FIG.

In the positioning structure 100 of the plate-shaped member 50 in the present embodiment, the plate-shaped member 50 is positioned with respect to the wall portion constituting the housing 40. Here, the wall portion constituting the housing 40 in the present disclosure means a member for forming a flow path in the housing 40. Hereinafter, the positioning structure 100 of the plate-shaped member 50 will be specifically described.

The positioning structure 100 of the plate-shaped member 50 includes a rear right bottom wall portion 132b having a slit 135 (see FIG. 2) and a convex portion 55 provided on the plate-shaped member 50 (see FIGS. 3 and 4). Be prepared.

The rear right bottom wall portion 132b has a circular outer peripheral edge as shown in FIG. The rear right bottom wall portion 132b has a linear region 134 in the downward direction (−Y direction) from the center of the circular shape. The linear region 134 is a semicircular region concentric with the center of the circular shape, and is curved in the downward direction (−Y direction).

As shown in FIG. 2, a plurality of (here, four) slits 135 are arranged at predetermined intervals in the linear region 134, as shown in FIG. That is, the four slits 135 are arranged apart from each other in the circumferential direction. This means that at least three slits 135 are not arranged in the same straight line in the YZ plane. In the linear region 134, a non-slit portion 136 that does not penetrate the linear region 134 is arranged in a portion between the slits 135 adjacent in the circumferential direction. Further, both ends of the linear region 134 are non-slit portions 136. That is, the five non-slit portions 136 are arranged so as to be separated from each other in the circumferential direction. This means that at least three non-slit portions 136 are not arranged on the same straight line in the YZ plane. In the following description, the four slits 135 are referred to as slit 135a, slit 135b, slit 135c, and slit 135d in order from one end side in the circumferential direction (tip side in the clockwise direction in FIG. 2). Further, the five non-slit portions 136 are referred to as non-slit portion 136a, non-slit portion 136b, non-slit portion 136c, non-slit portion 136d, and non-slit portion 136e in order from one end side in the circumferential direction.

The slit 135 penetrates the linear region 134 in the X direction. The slit 135 has a circular arc shape extending in the circumferential direction. The slit 135 has a predetermined width in each of the longitudinal direction and the lateral direction.

As shown in FIGS. 3 and 4, the plate-shaped member 50 has a semi-cylindrical outer shape with the X direction as the cylindrical axis direction. Further, the plate-shaped member 50 is formed by bending a plate material made of a metal material so as to have a semi-cylindrical shape by bending. The + X direction end of the plate-shaped member 50 has a semicircular edge portion 54 extending in the circumferential direction of the circular shape. The semicircular shape at the edge portion 54 has the same diameter as the semicircular shape at the linear region 134 described above.

A plurality of (here, four) convex portions 55 are arranged at predetermined intervals on the edge portion 54. That is, the four convex portions 55 are arranged apart from each other in the circumferential direction. This means that at least three convex portions 55 are not arranged on the same straight line in the YZ plane. In the following description, the four convex portions 55 are referred to as a convex portion 55a, a convex portion 55b, a convex portion 55c, and a convex portion 55d in order from one end side in the circumferential direction (the tip side in the clockwise direction in FIG. 3).

A recess 56 is arranged in a portion between the convex portions 55 adjacent to each other in the circumferential direction in the peripheral portion 54. Further, both ends of the edge portion 54 are recesses 56. That is, the five recesses 56 are arranged apart from each other in the circumferential direction. This means that at least three recesses 56 are not arranged in the same straight line in the YZ plane. In the following description, the five recesses 56 are referred to as recesses 56a, 56b, 56c, 56d, and 56e in order from one end side in the circumferential direction.

The convex portions 55a, 55b, 55c, 55d are arranged corresponding to the slits 135a, 135b, 135c, 135d, respectively, as shown in FIGS. 2 to 4. The convex portion 55 has a circular arc shape extending in the circumferential direction. The longitudinal width of the convex portion corresponds to the longitudinal width of the slit 135. The width of the convex portion in the lateral direction corresponds to the width of the slit 135 in the lateral direction. As a result, the convex portion 55 can be fitted into the slit 135. The length of the convex portion 55 (the amount of protrusion protruding from the concave portion 56 in the + X direction) is longer than the plate thickness of the rear right bottom wall portion 132b by a predetermined length. As a result, the tip portion of the convex portion 55 projects in the + X direction from the rear right bottom wall portion 132b (see FIGS. 6 and 7). The length of the convex portion 55 is set according to the size of the welded portion when the plate-shaped member 50 is welded to the rear right bottom wall portion 132b. The welding of the plate-shaped member 50 and the rear right bottom wall portion 132b will be described later.

By fitting at least three convex portions 55, which are not arranged on the same straight line in the YZ plane, into the slit 135 corresponding to the convex portion 55, the movement of the plate-shaped member 50 in the YZ plane is restricted, and X The rotation of the plate-shaped member 50 around the axis is restricted.

By the way, in order for the plate-shaped member 50 to be sufficiently positioned, it is necessary to limit the movement of the plate-shaped member 50 in the XY plane and the XZ plane. Further, it is necessary to limit the rotation of the plate-shaped member 50 around the Y-axis and the Z-axis. In the present embodiment, the recesses 56a, 56b, 56c, 56d, 56e are arranged corresponding to the non-slit portions 136a, 136b, 136c, 136d, 136e, respectively (see FIGS. 2 to 4). The concave portion 56 can come into contact with the non-slit portion 136 when the convex portion 55 fits into the slit 135.

By contacting each recess 56 with each non-slit portion 136, the plate-shaped member 50 is restricted from moving in the X direction. As a result, the movement of the plate-shaped member 50 in the XY plane and the XZ plane is restricted. Further, the rotation of the plate-shaped member 50 around the Y-axis and the Z-axis is restricted. As described above, the positioning structure 100 of the plate-shaped member 50 limits the movement of the plate-shaped member 50 in the XY plane, the YZ plane, and the XZ plane, and the rotation of the plate-shaped member 50 around the X-axis, the Y-axis, and the Z-axis. To limit. As a result, the plate-shaped member 50 can be positioned with respect to the rear right bottom wall portion 132b. In particular, by forming recesses 56 and 56e at both ends of the edge portion 54, the rotation of the plate-shaped member 50 around the X-axis, Y-axis and Z-axis can be sufficiently restricted, so that the plate-shaped member can be sufficiently restricted. The positioning of 50 becomes more reliable.

Next, the method of assembling the plate-shaped member 50 will be described with reference to FIGS. 5 to 7.

First, the convex portion 55 of the plate-shaped member 50 is fitted into the slit 135 of the rear right bottom wall portion 132b. At this time, each recess 56 is brought into contact with each non-slit portion 136. By fitting the convex portion 55 into the slit 135, the tip end portion of the convex portion 55 protrudes in the + X direction from the rear right bottom wall portion 132b.

Next, the plate-shaped member 50 is clamped with a jig. For example, by clamping the plate-shaped member 50 by pushing the end portion in the −X direction in the + X direction, the convex portion 55 is held in the state of being fitted in the slit 135, and the concave portion 56 is formed in the non-slit portion 136. Hold in contact.

Next, for example, by moving the welding torch along the welded portion, the tip portion of the convex portion 55 is welded and joined to the rear right bottom wall portion 132b. Welding is performed over the entire circumference of each slit 135 into which the convex portion 55 is fitted so that exhaust gas does not leak from the slit 135.

FIG. 5 is a + X direction arrow view showing the mixer chamber 13 and the plate-shaped member 50. FIG. 6 is an arrow view in the −Z direction of FIG. FIG. 7 is a view in the + Y direction of FIG. 6 and 7 show the rear peripheral wall portion 131b as a alternate long and short dash line. As shown in FIGS. 6 and 7, the welded portion WP is located on the + X side of the rear right bottom wall portion 132b. On the other hand, for example, since the jig clamps the end portion of the plate-shaped member 50 in the −X direction, the jig is located on the −X side of the rear right bottom wall portion 132b. As a result, since the welding torch does not interfere with the jig during welding, it is possible to perform the main welding with the jig attached to the plate-shaped member 50.

According to the positioning structure 100 of the plate-shaped member 50 in the above embodiment, the plate-shaped member 50 is provided on the rear right bottom wall portion 132b having the slit 135 and the edge portion 54 of the plate-shaped member 50, and the plate-shaped member 50 is the slit 135. A convex portion 55 that fits into the slit 135 is provided so as to limit movement in a direction orthogonal to the penetrating direction. This makes it possible to improve the positioning accuracy of the plate-shaped member 50 so that the plate-shaped member 50 does not shift in a direction other than the penetrating direction of the slit 135. Further, by providing a plurality of slits 135 and a plurality of convex portions 55 fitted thereto, it is possible to prevent the plate-shaped member 50 itself from being deformed due to the tensile strength. Further, by fitting the convex portion 55 into the slit 135, the plate-shaped member 50 is positioned in a direction other than the penetrating direction of the slit 135, so that the assembling workability can be improved.

In the above embodiment, the convex portion 55 is provided on the edge portion 54 at the + X direction end of the plate-shaped member 50, but the present disclosure is not limited to this. For example, when the second wall portion (for example, the rear left bottom wall portion 133b shown in FIG. 1) is arranged so as to sandwich the plate-shaped member 50 with the rear right bottom wall portion 132b, the second slit is formed in the second wall portion. May be provided, and a second convex portion that fits into the second slit may be provided at the edge portion of the plate-shaped member 50 at the end in the −X direction.

As a result, as in the above embodiment, the second wall portion can be positioned by fitting the second convex portion into the second slit, so that the assembling workability of the second wall portion can be improved. It becomes.

In addition, all of the above embodiments are merely examples of embodiment of the present disclosure, and the technical scope of the present disclosure should not be construed in a limited manner by these. That is, the present disclosure can be implemented in various forms without departing from its gist or its main features.

For example, in the above embodiment, the plate-shaped member 50 is attached to the housing 40 of the mixer chamber 13 of the exhaust purification device 1 as a flow path device, and rectifies the exhaust gas in the housing 40. However, the plate-shaped member 50 of the present disclosure is not limited to this, and is attached to, for example, an intake system housing such as an intake manifold or an exhaust gas recirculation system (EGR) housing, and the housing 40. The fluid inside may be split, dispersed and rectified.

Further, in the above embodiment, it has been described that the plate-shaped member 50 is positioned with respect to the rear right bottom wall portion 132b constituting the housing 40, but the wall portion constituting the housing 40 in the present disclosure Any member may be used as long as it is a member for forming a flow path in the housing 40.

Further, in the above embodiment, the edge portion 54 of the plate-shaped member 50 has been described as extending in the circumferential direction, but the edge portion of the plate-shaped member 50 in the present disclosure is not limited to this. , A part or all of the peripheral edge of the plate-shaped member 50 may be used.

The present disclosure is suitably used for a vehicle provided with a flow path device such as an exhaust gas purification device, which is required to improve the positioning accuracy of a plate-shaped member and improve the assembly workability.

1 Exhaust purification device 10 Diesel engine 11 Connection pipe 12 Front stage post-treatment device 13 Mixer chamber 13a Front stage chamber part 13b Rear stage chamber part 13c Communication part 14 Exhaust pipe 15 Post stage post treatment device 16 Urea water injection means 31 Front stage oxidation catalyst (pre-stage DOC)
32 Diesel Particulate Filter (DPF)
33 Selective reduced NOx catalyst (SCR)
34 Post-stage oxidation catalyst (post-stage DOC)
40 Housing 50 Plate-shaped member 54 Edges 55, 55a, 55b, 55c, 55d Convex parts 56, 56a, 56b, 56c, 56d, 56e Recesses 100 Positioning structure 131a Front peripheral wall 131b Rear peripheral wall 132a Front bottom wall 132b Rear right bottom wall 133b Rear left bottom wall 134 Linear area 135, 135a, 135b, 135c, 135d Slit 136, 136a, 136b, 136c, 136d, 136e Non-slit

Claims (7)

It is a positioning structure of plate-shaped members arranged in the housing.
A wall portion that constitutes the housing and has a slit,
A convex portion provided on the edge portion of the plate-shaped member and fitted to the slit so as to limit the movement of the plate-shaped member in a direction orthogonal to the penetrating direction of the slit.
A plate-shaped member positioning structure. A recess provided on the edge portion and abutting on the wall portion is further provided so as to limit the movement of the plate-shaped member in the penetrating direction of the slit.
The positioning structure for a plate-shaped member according to claim 1. The recesses are provided at both ends of the edge portion.
The positioning structure for a plate-shaped member according to claim 2. A second wall portion which is arranged so as to sandwich the plate-shaped member with the wall portion and has a second slit,
The plate-shaped member is provided at the edge portion on the side opposite to the edge portion where the convex portion is provided, and the second wall portion moves in a direction orthogonal to the penetrating direction of the second slit. A second convex portion that fits into the second slit so as to limit
The positioning structure for a plate-shaped member according to any one of claims 1 to 3, further comprising. A flow path device comprising the positioning structure for a plate-shaped member according to any one of claims 1 to 4, wherein a flow path is provided inside the housing. The plate-shaped member is welded to the wall portion.
The flow path device according to claim 5. It is a method of positioning plate-shaped members arranged in a housing.
By fitting the convex portion provided on the edge portion of the plate-shaped member into the slit provided on the wall portion of the housing, the direction in which the plate-shaped member is orthogonal to the penetrating direction of the slit. Restrict movement to,
Positioning method for plate-shaped members.

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