High-temperature sealing structure of engine exhaust pipe

Abstract

The utility model discloses a high-temperature sealing structure of an engine exhaust pipe, and relates to the technical field of sealing structures. The sealing device comprises a flange plate and a fixing plate, an elastic compensation mechanism is arranged on the flange plate, and the elastic compensation mechanism comprises an elastic compensation assembly and a sealing assembly; the elastic compensation assembly comprises three first connecting columns fixedly connected to the inner wall of the flange plate, the outer walls of the three first connecting columns are slidably connected with connecting discs, the inner wall of the flange plate is fixedly connected with three first springs, and the right ends of the three first springs are fixedly connected with the left sides of the three connecting discs. According to the automobile exhaust pipe, the elastic compensation mechanism is arranged, so that the size change of parts such as the exhaust pipe and the flange plate caused by thermal expansion can be compensated, a gap cannot be formed between sealing surfaces, and the sealing effect is greatly improved.

Description

Technical Field

[0001] This utility model belongs to the field of sealing structure technology, and in particular relates to a high-temperature sealing structure for an engine exhaust pipe. Background Technology

[0002] In the engine exhaust system, the high-temperature sealing structure of the exhaust pipe is a key component to ensure the system's sealing performance and stability. The exhaust system experiences high-temperature and high-pressure environments during engine operation, which places extremely high demands on the sealing structure. Traditional high-temperature sealing structures typically use metal or composite material gaskets and bolts to fix the exhaust pipe to the flange to prevent exhaust leakage.

[0003] However, traditional high-temperature sealing structures have drawbacks, especially the lack of elastic compensation structures. During the operation of the engine exhaust system, the temperature changes drastically, and components such as the exhaust pipe and flange will undergo dimensional changes due to thermal expansion. Traditional sealing gaskets cannot effectively compensate for these changes, resulting in gaps between the sealing surfaces, which greatly reduces the sealing effect. Utility Model Content

[0004] The purpose of this invention is to provide a high-temperature sealing structure for engine exhaust pipes. By incorporating an elastic compensation mechanism, it can compensate for dimensional changes in components such as the exhaust pipe and flange caused by thermal expansion, thus preventing gaps between the sealing surfaces and greatly improving the sealing effect. This solves the shortcomings of traditional high-temperature sealing structures, especially the lack of an elastic compensation mechanism. During the operation of the engine exhaust system, the temperature changes drastically, and components such as the exhaust pipe and flange will undergo dimensional changes due to thermal expansion. Traditional sealing gaskets cannot effectively compensate for these changes, leading to gaps between the sealing surfaces and greatly reducing the sealing effect.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model is a high-temperature sealing structure for an engine exhaust pipe, including a flange and a fixing plate. The flange is provided with an elastic compensation mechanism, which includes an elastic compensation component and a sealing component.

[0007] The elastic compensation assembly includes three first connecting columns fixedly connected to the inner wall of the flange, and connecting plates slidably connected to the outer walls of the three first connecting columns. Three first springs are fixedly connected to the inner wall of the flange. The right ends of the three first springs are fixedly connected to the left sides of the three connecting plates. Three connecting rods are hinged to the outer walls of the three connecting plates. Support rods are hinged to the ends of several connecting rods away from the connecting plates. The left ends of several support rods are hinged to the inner wall of the flange. Connecting plates are hinged to the right ends of several support rods.

[0008] Furthermore, the sealing assembly includes a top plate slidably connected to the inner wall of the flange, the right sides of several connecting plates and the left side of the top plate are slidably connected, a sealing gasket is provided on the inner wall of the flange, and the right side of the top plate and the left side of the sealing gasket are in contact.

[0009] Furthermore, a buffer mechanism is provided on the fixed plate, the buffer mechanism including a first buffer component, a connecting component, and a second buffer component;

[0010] The first buffer assembly includes a first fixed post fixedly connected to the bottom surface of a fixed plate, a first connecting plate slidably connected to the outer wall of the first fixed post, a second fixed post slidably connected to the inner wall of the first connecting plate, a damping spring fixedly connected to the bottom surface of the first fixed post, the bottom end of the damping spring being fixedly connected to the top surface of the second fixed post, and a second connecting seat fixedly connected to the bottom surface of the second fixed post.

[0011] Furthermore, the connecting assembly includes two first connecting rods hinged to the bottom surface of the fixed plate, two sliders slidably connected to the inner wall of the first connecting plate, the ends of the two first connecting rods away from the fixed plate and the top surfaces of the two sliders are hinged, the bottom surfaces of the two sliders are hinged to second connecting rods, and the ends of the two second connecting rods away from the sliders and the top surfaces of the second connecting seats are hinged.

[0012] Furthermore, the second buffer assembly includes two dampers fixedly connected to the inner wall of the first connecting plate. The ends of the two dampers that are close to each other and the sides of the two sliders that are far apart from each other are both fixedly connected. The inner wall of the first connecting plate is fixedly connected to two second springs. The ends of the two second springs that are close to each other and the sides of the two sliders that are far apart from each other are both fixedly connected.

[0013] Furthermore, a first flange is fixedly connected to the right side of the flange, the right side of the sealing gasket is in contact with the left side of the first flange, and three bolts are threadedly connected to the inner wall of the first flange and the flange. Anti-loosening gaskets are provided on the outer walls of the three bolts, and nuts are threadedly connected to the outer walls of the three bolts.

[0014] Furthermore, two connecting columns are fixedly connected to the bottom surface of the second connecting seat, and a first connecting seat is slidably connected to the outer wall of the two connecting columns. The inner walls of the first and second connecting seats are in contact with the outer walls of the flange and the first flange. A baffle is fixedly connected to the bottom end of each of the two connecting columns, and a spring is fixedly connected to the top surface of each of the two baffles. The top ends of the two springs are fixedly connected to the bottom surface of the first connecting seat.

[0015] This utility model has the following beneficial effects:

[0016] By incorporating an elastic compensation mechanism, the first spring pulls the connecting plate to slide to the left on the first connecting column. The connecting plate slides on the left side of the top plate and pushes against the top plate to move to the right. The top plate then presses against the sealing gasket and tightly against the side of the first flange. The elastic compensation mechanism can compensate for the dimensional changes of components such as the exhaust pipe and flange caused by thermal expansion, thus preventing gaps between the sealing surfaces and greatly improving the sealing effect.

[0017] 2. By setting up a buffer mechanism, when the exhaust pipe connection may be misaligned due to external force, the second fixed column on the second connecting seat and the first fixed column on the fixed plate will slide in the first connecting plate and compress the damping spring to achieve a buffering effect and offset the external force. The setting of the buffer mechanism can absorb vibration energy, reduce the impact of vibration on the flange connection and sealing structure, prevent flange loosening and sealing surface wear, thereby further improving the sealing effect.

[0018] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the rear view structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the buffer mechanism of this utility model;

[0023] Figure 4 This is a schematic diagram of the elastic compensation mechanism of this utility model;

[0024] Figure 5 This is a cross-sectional structural schematic diagram of the elastic compensation mechanism of this utility model;

[0025] Figure 6 This utility model Figure 4 A magnified structural diagram of point A in the middle.

[0026] The attached diagram lists the components represented by each number as follows:

[0027] 1. Flange; 2. Elastic compensation mechanism; 3. Buffer mechanism; 11. First flange; 12. Connecting column; 13. First connecting seat; 14. Spring; 15. Bolt; 16. Anti-loosening gasket; 17. Nut; 18. Baffle; 21. First connecting column; 22. Connecting plate; 23. First spring; 24. Connecting rod; 25. Support rod; 26. Connecting plate; 27. Top plate; 28. Sealing gasket; 31. Fixing plate; 32. First fixing column; 33. First connecting plate; 34. Second fixing column; 35. Vibration damping spring; 36. First connecting rod; 37. Second connecting rod; 38. Damper; 39. Second spring; 310. Second connecting seat; 311. Slider. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figure 1-6 As shown, this utility model is a high-temperature sealing structure for an engine exhaust pipe, including a flange 1 and a fixing plate 31. An elastic compensation mechanism 2 is provided on the flange 1, and the elastic compensation mechanism 2 includes an elastic compensation component and a sealing component.

[0030] The elastic compensation assembly includes three first connecting posts 21 fixedly connected to the inner wall of the flange 1. The outer walls of the three first connecting posts 21 are slidably connected to connecting plates 22. The inner wall of the flange 1 is fixedly connected to three first springs 23. The right ends of the three first springs 23 are fixedly connected to the left sides of the three connecting plates 22. The outer walls of the three connecting plates 22 are hinged to three connecting rods 24. The ends of several connecting rods 24 away from the connecting plates 22 are hinged to support rods 25. The left ends of several support rods 25 are hinged to the inner wall of the flange 1. The right ends of several support rods 25 are hinged to connecting plates 26.

[0031] Among them, such as Figure 5 As shown, the sealing assembly includes a top plate 27 that is slidably connected to the inner wall of the flange 1, and the right sides of several connecting plates 26 and the left side of the top plate 27 are slidably connected. A sealing gasket 28 is provided on the inner wall of the flange 1, and the right side of the top plate 27 and the left side of the sealing gasket 28 are in contact.

[0032] With the elastic compensation mechanism 2 in place, the first spring 23 on the flange 1 pulls the connecting plate 22 to slide to the left on the first connecting column 21. As the connecting plate 22 slides, it drives the support rod 25 to rotate and retract through the connecting rod 24. At this time, the connecting plate 26 slides on the left side of the top plate 27 and pushes the top plate 27 to the right. The top plate 27 pushes the sealing gasket 28 and presses it tightly against the side of the first flange 11. The elastic compensation mechanism 2 can compensate for the dimensional changes of components such as the exhaust pipe and flange caused by thermal expansion, so that gaps will not appear between the sealing surfaces, greatly improving the sealing effect.

[0033] Among them, such as Figure 3 As shown, a buffer mechanism 3 is provided on the fixed plate 31. The buffer mechanism 3 includes a first buffer component, a connecting component, and a second buffer component.

[0034] The first buffer assembly includes a first fixed post 32 fixedly connected to the bottom surface of the fixed plate 31, a first connecting plate 33 slidably connected to the outer wall of the first fixed post 32, a second fixed post 34 slidably connected to the inner wall of the first connecting plate 33, a vibration damping spring 35 fixedly connected to the bottom surface of the first fixed post 32, the bottom end of the vibration damping spring 35 fixedly connected to the top surface of the second fixed post 34, and a second connecting seat 310 fixedly connected to the bottom surface of the second fixed post 34.

[0035] Among them, such as Figure 3 As shown, the connecting assembly includes two first connecting rods 36 hinged to the bottom surface of the fixed plate 31. Two sliders 311 are slidably connected to the inner wall of the first connecting plate 33. The ends of the two first connecting rods 36 away from the fixed plate 31 and the top surfaces of the two sliders 311 are hinged. The bottom surfaces of the two sliders 311 are each hinged with a second connecting rod 37. The ends of the two second connecting rods 37 away from the sliders 311 and the top surfaces of the second connecting seat 310 are both hinged.

[0036] Among them, such as Figure 3 As shown, the second buffer assembly includes two dampers 38 fixedly connected to the inner wall of the first connecting plate 33. The ends of the two dampers 38 that are close to each other and the sides of the two sliders 311 that are far apart from each other are fixedly connected. The inner wall of the first connecting plate 33 is fixedly connected to two second springs 39. The ends of the two second springs 39 that are close to each other and the sides of the two sliders 311 that are far apart from each other are fixedly connected.

[0037] By incorporating the buffer mechanism 3, when the exhaust pipe connection may become misaligned due to external force, the second fixed post 34 on the second connecting seat 310 and the first fixed post 32 on the fixed plate 31 will slide in the first connecting plate 33 and compress the damping spring 35, achieving a buffering effect and offsetting the external force. Simultaneously, the first connecting rod 36 and the second connecting rod 37 will slide the slider 311 in the first connecting plate 33. As the slider 311 slides, it will compress the damper 38 and the second spring 39, further enhancing the buffering effect. The buffer mechanism 3 can absorb vibration energy, reduce the impact of vibration on the flange connection and sealing structure, prevent flange loosening and sealing surface wear, thereby further improving the sealing effect.

[0038] Among them, such as Figure 1 , Figure 2 and Figure 5 As shown, a first flange 11 is fixedly connected to the right side of flange 1. The right side of sealing gasket 28 is in contact with the left side of the first flange 11. Three bolts 15 are threadedly connected to the inner wall of the first flange 11 and flange 1. Anti-loosening gaskets 16 are provided on the outer wall of each of the three bolts 15. Nuts 17 are threadedly connected to the outer wall of each of the three bolts 15.

[0039] The flange 1 and the first flange 11 are connected by bolts 15. Bolts 15 have anti-loosening washers 16 and nuts 17. The anti-loosening washers 16 can be loosened to enhance the stability of the connection between flange 1 and the first flange 11.

[0040] Among them, such as Figure 1 As shown, two connecting posts 12 are fixedly connected to the bottom surface of the second connecting seat 310. The outer walls of the two connecting posts 12 are slidably connected to the first connecting seat 13. The inner walls of the first connecting seat 13 and the second connecting seat 310 are in contact with the outer walls of the flange 1 and the first flange 11. The bottom ends of the two connecting posts 12 are fixedly connected to baffles 18. The top surfaces of the two baffles 18 are fixedly connected to springs 14. The top ends of the two springs 14 are fixedly connected to the bottom surface of the first connecting seat 13.

[0041] By providing a connecting column 12, a first connecting seat 13 is slidably connected to the connecting column 12, and a spring 14 is fixedly connected between the first connecting seat 13 and the baffle 18. The spring 14 can push against the first connecting seat 13, so that the first connecting seat 13 and the second connecting seat 310 tightly clamp the flange 1 and the first flange 11, further enhancing the connection stability of the flange 1 and the first flange 11.

[0042] A specific application of this embodiment is as follows: by setting up the elastic compensation mechanism 2, the first spring 23 on the flange 1 pulls the connecting plate 22 to slide to the left on the first connecting column 21. While the connecting plate 22 slides, it will drive the support rod 25 to rotate and retract through the connecting rod 24. At this time, the connecting plate 26 will slide on the left side of the top plate 27 and push the top plate 27 to the right. The top plate 27 will push the sealing gasket 28 to press tightly against the side of the first flange 11. The setting of the elastic compensation mechanism 2 can compensate for the size changes of components such as the exhaust pipe and flange due to thermal expansion, so that there will be no gaps between the sealing surfaces, which greatly improves the sealing effect.

[0043] By providing a buffer mechanism 3, when the exhaust pipe connection may be misaligned due to external force, the second fixed column 34 on the second connecting seat 310 and the first fixed column 32 on the fixed plate 31 will slide in the first connecting plate 33 and compress the damping spring 35 to achieve a buffering effect and offset the external force. At the same time, the first connecting rod 36 and the second connecting rod 37 will slide the slider 311 in the first connecting plate 33. As the slider 311 slides, it will compress the damper 38 and the second spring 39, further enhancing the buffering effect. The buffer mechanism 3 can absorb vibration energy, reduce the impact of vibration on the flange connection and sealing structure, prevent flange loosening and sealing surface wear, thereby further improving the sealing effect.

[0044] The flange 1 and the first flange 11 are connected by bolts 15. The bolts 15 have anti-loosening washers 16 and nuts 17. The anti-loosening washers 16 can be loosened to enhance the stability of the connection between the flange 1 and the first flange 11.

[0045] By providing a connecting column 12, a first connecting seat 13 is slidably connected to the connecting column 12, and a spring 14 is fixedly connected between the first connecting seat 13 and the baffle 18. The spring 14 can push against the first connecting seat 13, so that the first connecting seat 13 and the second connecting seat 310 tightly clamp the flange 1 and the first flange 11, further enhancing the connection stability of the flange 1 and the first flange 11.

[0046] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A high-temperature sealing structure for an engine exhaust pipe, comprising a flange (1) and a fixing plate (31), characterized in that: The flange (1) is provided with an elastic compensation mechanism (2), which includes an elastic compensation component and a sealing component; The elastic compensation assembly includes three first connecting columns (21) fixedly connected to the inner wall of the flange (1). The outer walls of the three first connecting columns (21) are slidably connected to connecting discs (22). The inner wall of the flange (1) is fixedly connected to three first springs (23). The right ends of the three first springs (23) and the left sides of the three connecting discs (22) are fixedly connected. The outer walls of the three connecting discs (22) are hinged to three connecting rods (24). The ends of several connecting rods (24) away from the connecting discs (22) are hinged to support rods (25). The left ends of several support rods (25) are hinged to the inner wall of the flange (1). The right ends of several support rods (25) are hinged to connecting plates (26).

2. The high-temperature sealing structure for an engine exhaust pipe according to claim 1, characterized in that, The sealing assembly includes a top plate (27) that is slidably connected to the inner wall of the flange (1), and the right side of several connecting plates (26) and the left side of the top plate (27) are slidably connected. A sealing gasket (28) is provided on the inner wall of the flange (1), and the right side of the top plate (27) and the left side of the sealing gasket (28) are in contact.

3. The high-temperature sealing structure for an engine exhaust pipe according to claim 2, characterized in that, A buffer mechanism (3) is provided on the fixed plate (31), and the buffer mechanism (3) includes a first buffer component, a connecting component, and a second buffer component; The first buffer assembly includes a first fixed post (32) fixedly connected to the bottom surface of the fixed plate (31), a first connecting plate (33) slidably connected to the outer wall of the first fixed post (32), a second fixed post (34) slidably connected to the inner wall of the first connecting plate (33), a damping spring (35) fixedly connected to the bottom surface of the first fixed post (32), the bottom end of the damping spring (35) and the top surface of the second fixed post (34) fixedly connected, and a second connecting seat (310) fixedly connected to the bottom surface of the second fixed post (34).

4. The high-temperature sealing structure for an engine exhaust pipe according to claim 3, characterized in that, The connecting assembly includes two first connecting rods (36) hinged to the bottom surface of the fixed plate (31). Two sliders (311) are slidably connected to the inner wall of the first connecting plate (33). The ends of the two first connecting rods (36) away from the fixed plate (31) are hinged to the top surfaces of the two sliders (311). The bottom surfaces of the two sliders (311) are hinged to second connecting rods (37). The ends of the two second connecting rods (37) away from the sliders (311) are hinged to the top surfaces of the second connecting seat (310).

5. The high-temperature sealing structure for an engine exhaust pipe according to claim 4, characterized in that, The second buffer assembly includes two dampers (38) fixedly connected to the inner wall of the first connecting plate (33). The ends of the two dampers (38) that are close to each other and the sides of the two sliders (311) that are far apart from each other are fixedly connected. The inner wall of the first connecting plate (33) is fixedly connected to two second springs (39). The ends of the two second springs (39) that are close to each other and the sides of the two sliders (311) that are far apart from each other are fixedly connected.

6. The high-temperature sealing structure for an engine exhaust pipe according to claim 5, characterized in that, The right side of the flange (1) is fixedly connected to the first flange (11), the right side of the sealing gasket (28) is in contact with the left side of the first flange (11), the inner wall of the first flange (11) and the flange (1) are threaded with three bolts (15), the outer wall of the three bolts (15) is provided with anti-loosening gaskets (16), and the outer wall of the three bolts (15) is threaded with nuts (17).

7. The high-temperature sealing structure for an engine exhaust pipe according to claim 6, characterized in that, The bottom surface of the second connecting seat (310) is fixedly connected to two connecting columns (12), and the outer walls of the two connecting columns (12) are slidably connected to a first connecting seat (13). The inner walls of the first connecting seat (13) and the second connecting seat (310) are in contact with the outer walls of the flange (1) and the first flange (11). The bottom ends of the two connecting columns (12) are fixedly connected to baffles (18), and the top surfaces of the two baffles (18) are fixedly connected to springs (14). The top ends of the two springs (14) are fixedly connected to the bottom surface of the first connecting seat (13).

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