Differential pressure pipe fixing structure of engine tail gas particulate matter trapper

Abstract

The utility model relates to the technical field of automobile tail gas treatment systems, in particular to a differential pressure pipe fixing structure of an engine tail gas particulate matter trapper, which comprises a support, a first end of the support is connected to a particulate matter trapper shell, and a second end of the support forms a bearing surface. The pressing piece is detachably connected to the support, and a limiting face is arranged on the side, facing the bearing face, of the pressing piece. The connecting structure is connected to the pressing sheet and the bracket, so that the pressing sheet and the bracket are mutually fixed together; and an elastic pad body. The pressing piece and the support are connected together through the connecting mechanism, the differential pressure pipe is fixed in a detachable connecting and limiting mode, the connecting strength of the differential pressure pipe and the particle catcher is higher, meanwhile, the elastic gasket is arranged between the differential pressure pipe and the pressing piece, rigid contact between the differential pressure pipe and the pressing piece can be avoided, and therefore under different using environments, the particle catcher can not be damaged. The differential pressure pipe not only has more reliable connection strength, but also can avoid damage caused by rigid collision, and plays a better protection role.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile exhaust treatment system, and specifically relates to the differential pressure pipe fixing structure of engine exhaust particulate matter trap. BACKGROUND

[0002] The differential pressure pipe is an important component of the engine exhaust particulate trap (DPF, GPF), which is used to detect the pressure difference inside the particulate trap. When the engine is running, the engine exhaust gas flows through the particulate trap, and the particulate matter is trapped by the filter inside the particulate trap, reducing the particulate matter emission of the engine exhaust. When the particulate matter trapped inside the particulate trap gradually increases, it will cause the engine back pressure to rise, resulting in a decrease in engine performance. At this time, regeneration control is needed, such as active regeneration and passive regeneration methods, to remove the deposited particulate matter and restore the filtering performance of the trap.

[0003] In the engine exhaust treatment system, the differential pressure pipe is mainly used to monitor the change of pressure difference between the inlet and outlet of the particulate trap, which is detected by the pressure difference sensor to determine the working state of the particulate trap. Currently, a bracket structure is usually installed on the side wall of the particulate trap shell, and a steel clip structure for fixing the exhaust pipe is further installed on the bracket structure. Although this assembly method is beneficial to the assembly of the exhaust pipe, it is not strong enough. Since the particulate trap is usually cylindrical, it is not easy to take and place, so the differential pressure pipe is usually used as the force point, which can easily cause the pipe to fall off. SUMMARY

[0004] In view of the technical problems existing in the differential pressure pipe fixing structure of the engine exhaust particulate matter trap in the prior art, the utility model provides a differential pressure pipe fixing structure of an engine exhaust particulate matter trap, comprising:

[0005] A bracket is connected to the particulate trap shell at the first end and forms a supporting surface at the second end;

[0006] A pressing plate is detachably connected to the bracket, and a limiting surface is provided on one side of the pressing plate facing the supporting surface;

[0007] A connecting structure is connected to the pressing plate and the bracket, so that the pressing plate and the bracket are fixed together;

[0008] An elastic pad is arranged between the supporting surface and the limiting surface and is kept in contact with the limiting surface, forming a limiting space for clamping the differential pressure pipe between the elastic pad and the supporting surface;

[0009] Wherein, the limiting surface is set to be profiled with the outer contour of the differential pressure pipe, and when the connecting structure fixes the pressing plate and the bracket together, the height of the limiting space between the elastic pad and the supporting surface is less than the outer diameter of the differential pressure pipe, so that the elastic pad is compressed and deformed.

[0010] Preferably, the pressing piece comprises a connecting region and a limiting region, the connecting region is configured as a flat plate structure, the limiting region is configured as an arc-shaped plate structure, and an inner side of the arc-shaped plate structure is provided with the limiting surface.

[0011] Preferably, the limiting region is provided with a positioning groove, the elastic pad body comprises a pad body and a positioning block arranged on an outer wall of the pad body, the positioning block is clamped with the positioning groove, and relative positions of the elastic pad body and the pressing piece are fixed.

[0012] Preferably, the positioning groove is a strip-shaped groove.

[0013] Preferably, the positioning groove extends from a top of the arc-shaped plate structure to an edge.

[0014] Preferably, the support frame comprises a support plate and a first support frame and a second support frame connected to two ends of the support plate, an upper end surface of the support plate is a bearing surface, and the first support frame and the second support frame are both welded to the particle trap shell.

[0015] Preferably, a nut is connected to the support plate, and the connecting structure comprises a screw rod, the screw rod passes through the pressing piece and the nut, and the pressing piece is fixed to a surface of the support plate.

[0016] Preferably, the thickness of the elastic pad body is 3-5 mm, and an inner wall of the elastic pad body is provided with a groove.

[0017] Compared with the prior art, the utility model has the advantages that:

[0018] The utility model discloses a connecting mechanism is connected together to the pressing piece and the support frame, and the differential pressure pipe is fixed in the way of detachable connection and limiting, the connecting strength of the differential pressure pipe and the particle trap is higher, meanwhile, the elastic pad is arranged between the differential pressure pipe and the pressing piece, rigid contact between the differential pressure pipe and the pressing piece can be avoided, therefore, under different use environment, the differential pressure pipe not only has more reliable connecting strength, but also can avoid damage caused by rigid impact, and better protection effect is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings are not intended to be drawn to scale. In the drawings, each same or like component shown in each of the figures can be denoted with the same reference numerals. In the interest of clarity, not each component of each figure is labeled. Embodiments of various aspects of the present utility model will now be described, by way of example only, and with reference to the accompanying drawings in which:

[0020] Figure 1 Is the differential pressure pipe fixing structure of the engine exhaust particulate trap shown in the utility model is installed outside the particle trap shell schematic view;

[0021] Figure 2 is the structure schematic view of the differential pressure pipe fixing structure of the engine exhaust particulate matter trap shown in the utility model;

[0022] Figure 3 is the structure schematic view of the support shown in the utility model;

[0023] Figure 4 is the structure schematic view of the elastic pad shown in the utility model. DETAILED DESCRIPTION

[0024] In order to understand the technical content of the utility model more, specific embodiments are raised and the following is described with the attached drawings.

[0025] Combining Figure 1 shown in the utility model, the utility model proposes a differential pressure pipe fixing structure of engine exhaust particulate matter trap, including support 10, pressing piece 20, connecting structure 30 and elastic pad 40.

[0026] Support 10 is the supporting structure, and the first end of support 10 is connected to the particulate trap housing 200, and the second end forms a supporting surface.

[0027] In the optional embodiment, combining Figure 2 and Figure 3 shown in the utility model, support 10 includes support plate 13 and first support 11 and second support 12 connected to both ends of support plate 13, and the upper end surface of support plate 13 is the supporting surface, and first support 11 and second support 12 are both welded to the particulate trap housing 200.

[0028] Specifically, according to the shape of the particulate trap housing 200, first support 11 and second support 12 of different heights can be selected, and at the same time, the bottom of first support 11 and second support 12 can be welded to the particulate trap housing 200 by changing the angle of first support 11 and second support 12 relative to support plate 13.

[0029] Optionally, first support 11, second support 12 and support plate 13 are formed by pre-bending stainless steel sheet.

[0030] Further, pressing piece 20 is the limiting structure of differential pressure pipe 100, and pressing piece 20 is detachably connected to support 10, and pressing piece 20 is provided with a limiting surface on the side facing the supporting surface.

[0031] Combining Figure 3 shown in the utility model, pressing piece 20 includes connecting area 21 and limiting area 22, connecting area 21 is configured as a flat plate structure, and limiting area 22 is configured as an arc plate structure, and the inner side surface of the arc plate structure is provided with a limiting surface.

[0032] Specifically, the connecting area 21 is connected to the upper end surface of the support plate 13 through the connecting structure 30, and the limiting area 22 is used to fix the differential pressure pipe 100 to the surface of the support plate 13.

[0033] Further, in combination with Figure 1 and Figure 2 shown, in order to make the connection of the pressing plate 20 and the support 10 reliable, the connecting structure 30 is connected to the pressing plate 20 and the support 10, so that the pressing plate 20 and the support 10 are fixed together.

[0034] Wherein, the support plate 13 is connected with a nut 14, specifically, the nut 14 is welded to the lower end surface of the support plate 13, and the connecting structure 30 includes a screw rod, the screw rod passes through the pressing plate 20 and the nut 14, so that the pressing plate 20 is fixed to the surface of the support plate 13.

[0035] In combination with Figure 3 shown, in order to reduce the rigid contact between the differential pressure pipe 100 and the pressing plate 20, and make the connection of the connecting structure 30 produce pre-stress, play the effect of anti-loose, the elastic pad 40 is arranged between the supporting surface and the limiting surface, and keeps in close contact with the limiting surface.

[0036] In this way, the limiting space for clamping the differential pressure pipe 100 is formed between the elastic pad 40 and the supporting surface, and the differential pressure pipe 100 is clamped in the limiting space.

[0037] In the preferred embodiment, in combination with Figure 3 shown, the limiting surface is set to be profiled with the outer contour of the differential pressure pipe 100, when the connecting structure 30 fixes the pressing plate 20 and the support 10 together, the height of the limiting space formed between the elastic pad 40 and the supporting surface is slightly smaller than the outer diameter of the differential pressure pipe 100, so that the elastic pad 40 produces compression deformation.

[0038] In this way, when assembling, the differential pressure pipe 100 is placed on the upper end surface of the support plate 13, and then the pressing plate 20 with the elastic pad 40 is placed above the differential pressure pipe 100, and the pressing plate 20 is pressed tightly using the connecting structure 30, at this time, the differential pressure pipe 100 is closely attached to the elastic pad 40, and will not shake, therefore, no matter whether the user holds the differential pressure pipe 100 to transfer the particle trap before installation to the vehicle or the vehicle bounces after installation to the vehicle, the differential pressure pipe 100 will not fall off, collide and be damaged, which plays a good protection and limiting effect on the differential pressure pipe 100.

[0039] In the optional embodiment, in combination with Figure 2 and Figure 4 shown, the limiting area 22 is provided with a positioning groove 23, the elastic pad 40 includes a pad 41 and a positioning block 42 arranged on the outer wall of the pad 41, the positioning block 42 is clamped with the positioning groove 23, so that the relative position of the elastic pad 40 and the pressing plate 20 is fixed.

[0040] Thus, by the cooperation of the positioning block 42 and the positioning groove 23, displacement of the elastic pad 40 during vibration can be avoided, and reliable positioning is ensured.

[0041] Optionally, the positioning groove 23 is a strip-shaped groove. Figure 2 As shown, the positioning groove 23 extends from the top of the arc-shaped plate structure to the edge.

[0042] Thus, the elastic pad 40 is firmly fixed to the inner side of the limiting area 22 and cannot be displaced in the axial direction of the differential pressure pipe 100.

[0043] In the alternative embodiment, the thickness of the elastic pad 40 is 3-5 mm, the elastic pad 40 can be a nylon or rubber pad, and the inner wall of the elastic pad 40 is provided with a groove, so that the elasticity of the elastic pad 40 can be increased.

[0044] In combination with the above embodiments, the tablet and the support are connected together by the connecting mechanism, the differential pressure pipe is fixed in a detachable and limiting manner, the connection strength of the differential pressure pipe and the particle trap is higher, and at the same time, the elastic pad is arranged between the differential pressure pipe and the tablet, rigid contact between the differential pressure pipe and the tablet can be avoided, so that in different use environments, the differential pressure pipe not only has more reliable connection strength, but also can avoid damage caused by rigid impact, and better protection is achieved.

[0045] Although the present application has been disclosed with reference to the preferred embodiments, it is not intended to limit the present application. Those skilled in the art can make various modifications and improvements without departing from the spirit and scope of the present application. Therefore, the protection scope of the present application shall be subject to the claims.

Claims

1. A differential pressure tube fixing structure of an engine exhaust particulate trap, characterized by, The utility model relates to a particle trap fixing device, comprising: a bracket (10) with a first end connected to a particle trap housing (200) and a second end forming a supporting surface; a pressing plate (20) detachably connected to the bracket (10), the pressing plate (20) being provided with a limiting surface on one side facing the supporting surface; a connecting structure (30) connected to the pressing plate (20) and the bracket (10) to fix the pressing plate (20) and the bracket (10) to each other; a resilient pad (40) arranged between the supporting surface and the limiting surface and kept in contact with the limiting surface to form a limiting space for clamping a differential pressure tube (100) between the resilient pad (40) and the supporting surface; wherein the limiting surface is shaped to match the outer contour of the differential pressure tube (100), and after the connecting structure (30) fixes the pressing plate (20) and the bracket (10) to each other, the height of the limiting space between the resilient pad (40) and the supporting surface is less than the outer diameter of the differential pressure tube (100), so that the resilient pad (40) is compressed and deformed.

2. The differential pressure tube fixing structure of an engine exhaust particulate trap according to claim 1, characterized by, The pressing plate (20) comprises a connecting region (21) and a limiting region (22), the connecting region (21) is configured as a flat plate structure, and the limiting region (22) is configured as an arc-shaped plate structure, and the inner side of the arc-shaped plate structure is provided with the limiting surface.

3. The differential pressure tube fixing structure of an engine exhaust particulate trap according to claim 2, characterized by, The limiting region (22) is provided with a positioning groove (23), and the resilient pad (40) comprises a pad (41) and a positioning block (42) arranged on the outer wall of the pad (41), the positioning block (42) is engaged with the positioning groove (23), so that the relative position of the resilient pad (40) and the pressing plate (20) is fixed.

4. The differential pressure tube fixing structure of an engine exhaust particulate trap according to claim 3, characterized by, The positioning groove (23) is a strip-shaped groove.

5. The differential pressure tube fixing structure of an engine exhaust particulate trap according to claim 3, characterized by, The positioning groove (23) extends from the top of the arc-shaped plate structure to the edge.

6. The differential pressure tube securing structure for an engine exhaust particulate trap according to claim 1, characterized by The bracket (10) comprises a support plate (13), a first bracket (11) and a second bracket (12) connected to both ends of the support plate (13), the upper end surface of the support plate (13) is the supporting surface, and the first bracket (11) and the second bracket (12) are both welded to the particle trap housing (200).

7. The differential pressure tube securing structure for an engine exhaust particulate trap according to claim 6, characterized by The support plate (13) is connected with a nut (14), the connecting structure (30) comprises a screw rod, the screw rod passes through the pressing plate (20) and the nut (14), so that the pressing plate (20) is fixed to the surface of the support plate (13).

8. The differential pressure tube securing structure for an engine exhaust particulate trap according to claim 1, characterized by, The thickness of the resilient pad (40) is 3-5 mm, and the inner wall of the resilient pad (40) is provided with a groove.

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