A leak-proof exhaust pipe sealing device

Abstract

The utility model discloses a kind of leakage-proof exhaust pipe sealing devices, it is related to the technical field of automobile parts, including exhaust pipe front section and exhaust pipe rear section, the connecting portion of exhaust pipe front section and exhaust pipe rear section is provided with sealing assembly, sealing assembly includes the connecting block connected with exhaust pipe front section and exhaust pipe rear section, the both ends of connecting block are symmetrically provided with first U-shaped groove and the second U-shaped groove communicated with first U-shaped groove, the top of first U-shaped groove and second U-shaped groove is inserted with plug, the utility model is positioned by first U-shaped groove and second U-shaped groove on connecting block to the positioning insertion of exhaust pipe front section, exhaust pipe rear section connecting end, and the close adhesion of plug and pipe section outer circumferential side surface, cooperate cover plate and be installed by the clamping of insertion post and insertion hole to the compression of first sealing pad Effect, form the sealing structure of multiple components cooperation, effectively fill the gap between exhaust pipe end and connecting block, plug and cover plate, to reduce exhaust pipe connecting portion leakage risk.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to a leak-proof exhaust pipe sealing device. Background Technology

[0002] The intake manifold is a key component of the engine's intake system. Its core function is to distribute clean air filtered by the air filter, or the mixture of fuel and air, evenly and stably to each cylinder of the engine, providing sufficient and adequate intake air for combustion in the cylinders, which directly affects the engine's power output, fuel economy, and emissions performance.

[0003] In exhaust pipe leakage problems, the connection point is the main leakage point. This is closely related to the structural design and working environment of the connection point. The exhaust pipe connection point needs to connect different pipe sections. Usually, a flange connection with a seal is used. To ensure exhaust sealing, the seal needs to fit tightly with the flange face. However, when the engine is running, the high temperature exhaust gas in the exhaust pipe will cause the metal flange at the connection point to expand and contract with temperature. Long-term alternation of hot and cold will easily lead to deformation of the flange face. At the same time, engine vibration will loosen the bolts at the connection point, causing gaps between the seal and the flange face, which becomes the main location of exhaust pipe leakage.

[0004] Therefore, it is necessary to invent a leak-proof exhaust pipe sealing device to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a leak-proof exhaust pipe sealing device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a leak-proof exhaust pipe sealing device, comprising a front section of an exhaust pipe and a rear section of an exhaust pipe, wherein a sealing assembly is provided at the connection between the front section of the exhaust pipe and the rear section of the exhaust pipe, the sealing assembly comprising a connecting block connected to the front section of the exhaust pipe and the rear section of the exhaust pipe, wherein a first U-shaped groove and a second U-shaped groove communicating with the first U-shaped groove are symmetrically opened at both ends of the connecting block, wherein a plug is inserted into the top of the first U-shaped groove and the second U-shaped groove, wherein a first sealing gasket is provided on the top of the connecting block, the bottom of the first sealing gasket being fitted to the top of the plug, wherein multiple insertion holes are symmetrically opened on both sides of the top of the connecting block, and a cover plate is installed on the top of the connecting block, wherein multiple plugs that are inserted into the insertion holes are symmetrically fixedly installed on both sides of the cover plate.

[0007] Preferably, the first U-shaped groove and the second U-shaped groove are inserted into the front section and the rear section of the exhaust pipe, and the insert is attached to the outer peripheral side of the front section and the rear section of the exhaust pipe.

[0008] Preferably, the outer side of the insertion post is provided with a triangular protrusion, and the triangular protrusion is engaged with the insertion hole.

[0009] Preferably, the connecting block has a circular hole inside, and a circular sealing gasket is fitted into the circular hole.

[0010] Preferably, a limiting component is provided at the top center of the two connecting blocks. The two limiting components include a disc fitted into a circular hole, one side of the disc abutting against a circular sealing gasket, and a vertical plate fixedly connected to the other side of the two discs. Sealing blocks are symmetrically fixedly connected to the upper inner sides of the two vertical plates. Preferably, a limiting rod is symmetrically and movably inserted between the two vertical plates, and a compression spring with its two ends respectively abutting against the vertical plate is sleeved on the outer peripheral surface of the two limiting rods.

[0011] Preferably, a rectangular sealing gasket is inserted into the top of the vertical plate, and the rectangular sealing gasket is inserted into the cover plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. By using the first and second U-shaped grooves on the connecting block to position and insert the front and rear ends of the exhaust pipe, and by ensuring a tight fit between the insert block and the outer circumference of the pipe section, combined with the pressing effect of the cover plate on the first sealing gasket through the engagement of the insert post and the insertion hole, a multi-component collaborative sealing structure is formed. This effectively fills the gaps between the exhaust pipe end and the connecting block, and between the insert block and the cover plate. At the same time, the cover plate's protective function for internal components reduces interference from external factors, thus alleviating the gap problems that may be caused by the poor fit between the seal and the flange surface in traditional flange connections, as well as long-term hot and cold alternation, thereby reducing the risk of leakage at the exhaust pipe connection.

[0013] 2. The circular sealing gasket is pressed tightly against the inner wall of the circular hole of the connecting block by the disc in the limiting assembly. At the same time, the limiting rod guides and limits the relative movement of the vertical plate. Combined with the outward elastic pressure provided by the compression spring to the vertical plate, the sealing block always remains in a tight fit. The rectangular sealing gasket fills the gap between the vertical plate and the cover plate by engaging with the protruding block and the groove of the cover plate. This buffers the impact of engine vibration on the connecting parts, avoids the problem of loosening of parts such as bolts due to vibration, further ensures the stability of the sealing structure, prevents the formation of sealing gaps, and thus solves the problem of leakage caused by vibration at the exhaust pipe connection. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the structure of the insert block, the first sealing gasket, and the cover plate of this utility model.

[0016] Figure 3 This is a schematic diagram of the connecting block of this utility model.

[0017] Figure 4 This is a schematic cross-sectional view of the present invention.

[0018] Figure 5 This is a schematic diagram of the limiting component of this utility model.

[0019] Figure 6 This is a schematic diagram of the connecting block and limiting component of this utility model.

[0020] In the diagram: 1. Front section of exhaust pipe; 2. Sealing assembly; 201. Connecting block; 2010. First U-shaped groove; 2011. Second U-shaped groove; 2012. Insertion hole; 2013. Round hole; 202. Insertion block; 203. First sealing gasket; 204. Cover plate; 2040. Insert post; 205. Rectangular sealing gasket; 206. Circular sealing gasket; 207. Limiting assembly; 2070. Disc; 2071. Vertical plate; 2072. Sealing block; 2073. Limiting rod; 2074. Compression spring; 3. Rear section of exhaust pipe. Detailed Implementation

[0021] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] This utility model provides, for example Figures 1-4 The disclosed leak-proof exhaust pipe sealing device includes an exhaust pipe front section 1 and an exhaust pipe rear section 3. A sealing component 2 is provided at the connection between the exhaust pipe front section 1 and the exhaust pipe rear section 3. The sealing component 2 includes a connecting block 201 connected to the exhaust pipe front section 1 and the exhaust pipe rear section 3. The two ends of the connecting block 201 are symmetrically provided with a first U-shaped groove 2010 and a second U-shaped groove 2011 communicating with the first U-shaped groove 2010. Insert blocks 202 are inserted into the top of the first U-shaped groove 2010 and the second U-shaped groove 2011. A first sealing gasket 203 is provided on the top of the connecting block 201. The bottom of the first sealing gasket 203 fits against the top of the insert block 202. Multiple insertion holes 2012 are symmetrically provided on both sides of the top of the connecting block 201. A cover plate 204 is installed on the top of the connecting block 201. Multiple insertion posts 2040 that are inserted into the insertion holes 2012 are symmetrically fixed on both sides of the cover plate 204.

[0023] The exhaust pipe front section 1 and exhaust pipe rear section 3 form a segmented connection of the exhaust passage, providing a basic channel sealing component for exhaust gas discharge. The sealing component 2 is used to seal the connection between the exhaust pipe front section 1 and exhaust pipe rear section 3 to prevent exhaust gas leakage. The connecting block 201 serves as a connection base component, providing an installation and connection carrier for the exhaust pipe front section 1, exhaust pipe rear section 3, and other sealing-related components. The first U-shaped groove 2010 and the second U-shaped groove 2011 are used to accommodate and position the connection ends of the exhaust pipe front section 1 and exhaust pipe rear section 3, achieving initial docking between the pipe segment and the connecting block 201. The insert block 202 is inserted into the top of the first U-shaped groove 2010 and the second U-shaped groove 2011, which can position the exhaust pipe front section 1 and exhaust pipe rear section 3 within the groove. The positioning is limited to prevent lateral displacement of the pipe section and also to provide a seal. The first sealing gasket 203 fits against the top of the insert block 202 and fills the gap between the insert block 202 and the cover plate 204 to prevent exhaust gas from leaking from this part. The insertion hole 2012 provides a insertion hole for the insert post 2040 to realize the positioning connection between the cover plate 204 and the connecting block 201. The cover plate 204 covers the top of the connecting block 201, and at the same time, a groove of the same size as the first sealing gasket 203 is opened at the bottom. The cover plate 204 can protect and shield the components on the top of the connecting block 201 to enhance the sealing effect. The insert post 2040 is inserted into the insertion hole 2012 to fix the cover plate 204 on the connecting block 201, ensuring the stability of the cover plate 204 installation.

[0024] The first U-shaped groove 2010 and the second U-shaped groove 2011 are inserted into the front section 1 and the rear section 3 of the exhaust pipe, respectively. The insert 202 fits against the outer periphery of the front section 1 and the rear section 3 of the exhaust pipe. The cover plate 204, the first U-shaped groove 2010 and the second U-shaped groove 2011 are inserted into the front section 1 and the rear section 3 of the exhaust pipe, further enhancing the connection stability between the pipe section and the connecting block 201, ensuring that the pipe section is not easily detached from the connecting block 201 during operation. The insert 202 fits against the outer periphery of the front section 1 and the rear section 3 of the exhaust pipe, tightly wrapping the pipe. The outer periphery of the pipe section reduces the gap between the pipe section and the insertion block 202, improving the sealing performance of this part and further restricting the radial movement of the pipe section. The outer side of the insertion post 2040 is provided with a triangular protrusion, which engages with the insertion hole 2012. The engagement of the triangular protrusion with the insertion hole 2012 can prevent the insertion post 2040 from loosening or falling off in the insertion hole 2012, enhance the firmness of the connection between the insertion post 2040 and the insertion hole 2012, and thus ensure the stability of the cover plate 204 installation, avoiding the overall sealing effect from being affected by the loosening of the cover plate, and facilitating subsequent disassembly.

[0025] A circular hole 2013 is provided inside the connecting block 201. A circular sealing gasket 206 is fitted into the circular hole 2013, providing installation space for the circular sealing gasket 206. The circular sealing gasket 206 is fitted into the circular hole 2013. A limiting component 207 is provided at the top center of the two connecting blocks 201. The two limiting components 207 include a disc 2070 fitted into the circular hole 2013. One side of the disc 2070 abuts against the circular sealing gasket 206. A vertical plate 2071 is fixedly connected to the other side of the two discs 2070. A sealing block 2072 is symmetrically fixedly connected to the upper inner side of the two vertical plates 2071. The limiting component 207 is used to limit the sealing gasket 206. The connecting block 201 assists in sealing and improves the overall sealing performance. The disc 2070 is fitted inside the circular hole 2013. On the one hand, it can compress the circular sealing gasket 206, making the circular sealing gasket 206 fit better against the inner wall of the circular hole 2013 and enhance the sealing effect. On the other hand, it can provide installation support for the vertical plate 2071. The vertical plate 2071 is fixedly connected to the disc 2070 and serves as the installation carrier for components such as the sealing block 2072 and the limiting rod 2073. The sealing block 2072 is fixed above the inner side of the vertical plate 2071 and can fill the gap above the two vertical plates 2071 to prevent exhaust gas from leaking from the gap, further improving the sealing performance of the connection.

[0026] Two vertical plates 2071 are symmetrically connected by a limiting rod 2073. Compression springs 2074, with their ends abutting against the vertical plates 2071, are fitted onto the outer periphery of the two limiting rods 2073. The limiting rods 2073 movably pass through the two vertical plates 2071, guiding and limiting their relative movement. The compression springs 2074, fitted around the limiting rods 2073 and abutting against the vertical plates 2071, provide elastic force to the two vertical plates 2071, ensuring they are constantly pressed outwards. This keeps the sealing block 2072 in a tight fit and also buffers the impact of engine vibration on the vertical plates 2071, reducing sealing gaps caused by vibration. The top of the vertical plate 2071... A rectangular sealing gasket 205 is inserted into the cover plate 204. The rectangular sealing gasket 205 is inserted into the top of the vertical plate 2071 and into the cover plate 204. It can fill the gap between the top of the vertical plate 2071 and the cover plate 204, prevent exhaust gas from leaking from this part, further improve the overall sealing structure, and ensure that there is no risk of exhaust gas leakage at the connection. At the same time, a protruding block is provided on one side of the rectangular sealing gasket 205. The protruding block engages with the groove at the bottom of the cover plate 204, thereby improving the stability of the installation of the rectangular sealing gasket 205.

[0027] The working principle of this utility model is as follows: First, the exhaust passage is segmented and connected through the front section 1 and the rear section 3 of the exhaust pipe, providing a basic exhaust channel for the exhaust gas generated by the engine. The connection between the two is sealed and protected by the sealing component 2 to prevent exhaust gas leakage. Specifically, the connecting block 201 in the sealing component serves as the core connecting component. The first U-shaped groove 2010 and the second U-shaped groove 2011, which are symmetrically opened at both ends, are inserted into the connection ends of the front section 1 and the rear section 3 of the exhaust pipe. The groove structure is used to initially position the pipe section and ensure that the pipe section is stably connected to the connecting block 201. Subsequently, the insert 202 is inserted into the top of the first U-shaped groove 2010 and the second U-shaped groove 2011. The insert 202 will fit tightly against the outer peripheral side of the front section 1 and the rear section 3 of the exhaust pipe, further limiting the radial movement of the pipe section on the one hand, and filling the gap between the pipe section and the groove on the other hand, forming a preliminary seal.

[0028] After the pipe section and connecting block 201 are connected, a first sealing gasket 203 is laid on top of the connecting block 201, so that the bottom of the first sealing gasket 203 fits against the top of the insert block 202. Then, the cover plate 204 is installed. The inserts 2040 on both sides of the cover plate 204 will be inserted into the corresponding holes 2012 on the top of the connecting block 201, and the triangular protrusions on the outer side of the inserts 2040 will engage with the holes 2012, which not only ensures the firmness of the cover plate 204 installation, but also facilitates subsequent disassembly. At the same time, the groove at the bottom of the cover plate 204, which is the same size as the first sealing gasket 203, will fit against the first sealing gasket 203. Through the pressing effect of the cover plate 204, the first sealing gasket 203 fully fills the gap between the insert block 202 and the cover plate 204, enhancing the top sealing effect. The cover plate 204 can also protect the components on the top of the connecting block 201 to prevent external impurities from affecting the sealing performance.

[0029] Inside the connecting block 201, the circular hole 2013 provides installation space for the circular sealing gasket 206, while the limiting component 207 further enhances the sealing effect of this part. The disc 2070 in the limiting component 207 is fitted inside the circular hole 2013, with one side abutting against the circular sealing gasket 206. Through the squeezing action of the disc 2070, the circular sealing gasket 206 is tightly fitted to the inner wall of the circular hole 2013, preventing exhaust gas from leaking from the circular hole 2013. The vertical plate 2071 fixed on the other side of the disc 2070 serves as the mounting carrier for the sealing block 2072 and the limiting rod 2073. The sealing block is located above the inner side of the vertical plate 2071. 2072 fills the upper gap between the two vertical plates 2071, forming a sealed protection. In addition, the limiting rod 2073 that moves through the two vertical plates 2071 guides and limits the relative movement of the vertical plates 2071, preventing the vertical plates 2071 from shifting. The compression spring 2074 sleeved on the outer periphery of the limiting rod 2073 abuts against the vertical plates 2071 at both ends, providing an outward elastic extrusion force to the vertical plates 2071, so that the vertical plates 2071 and the sealing block 2072 always keep in a tight fit. At the same time, it buffers the impact of vibration generated during engine operation on the vertical plates 2071, reducing the sealing gap caused by vibration. Finally, the rectangular sealing gasket 205 inserted at the top of the vertical plate 2071 will be inserted into the cover plate 204. The protrusion on one side of the gasket engages with the groove at the bottom of the cover plate 204, which not only ensures the stable installation of the rectangular sealing gasket 205, but also fills the gap between the top of the vertical plate 2071 and the cover plate 204, thus forming a multi-directional and multi-layered sealing structure to ensure that there is no exhaust gas leakage at the exhaust pipe connection.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A leak-proof exhaust pipe sealing device, comprising a front section (1) of an exhaust pipe and a rear section (3) of an exhaust pipe, characterized in that: A sealing assembly (2) is provided at the connection between the front section (1) and the rear section (3) of the exhaust pipe. The sealing assembly (2) includes a connecting block (201) that connects to the front section (1) and the rear section (3) of the exhaust pipe. The two ends of the connecting block (201) are symmetrically provided with a first U-shaped groove (2010) and a second U-shaped groove (2011) that communicates with the first U-shaped groove (2010). Inserts (202) are inserted into the top of the first U-shaped groove (2010) and the second U-shaped groove (2011). The top of the connecting block (201) is provided with a first sealing gasket (203), the bottom of the first sealing gasket (203) is in contact with the top of the insert block (202), a plurality of insertion holes (2012) are symmetrically opened on both sides of the top of the connecting block (201), a cover plate (204) is installed on the top of the connecting block (201), and a plurality of insertion posts (2040) that are inserted into the insertion holes (2012) are symmetrically fixed on both sides of the cover plate (204).

2. The leak-proof exhaust pipe sealing device according to claim 1, characterized in that: The first U-shaped groove (2010) and the second U-shaped groove (2011) are inserted into the front section (1) and the rear section (3) of the exhaust pipe, and the insert (202) is attached to the outer peripheral side of the front section (1) and the rear section (3) of the exhaust pipe.

3. The leak-proof exhaust pipe sealing device according to claim 1, characterized in that: The outer side of the insert (2040) is provided with a triangular protrusion, and the triangular protrusion is engaged with the insertion hole (2012).

4. The leak-proof exhaust pipe sealing device according to claim 1, characterized in that: The connecting block (201) has a circular hole (2013) inside, and a circular sealing gasket (206) is fitted into the circular hole (2013).

5. The leak-proof exhaust pipe sealing device according to claim 1, characterized in that: A limiting component (207) is provided at the top center of the two connecting blocks (201). The two limiting components (207) include a disc (2070) fitted into a circular hole (2013). One side of the disc (2070) abuts against a circular sealing gasket (206). A vertical plate (2071) is fixedly connected to the other side of the two discs (2070). A sealing block (2072) is symmetrically fixedly connected above the inner side of the two vertical plates (2071).

6. The leak-proof exhaust pipe sealing device according to claim 5, characterized in that: A limiting rod (2073) is symmetrically and movably inserted between the two vertical plates (2071), and a compression spring (2074) with both ends abutting against the vertical plate (2071) is sleeved on the outer peripheral surface of the two limiting rods (2073).

7. The leak-proof exhaust pipe sealing device according to claim 5, characterized in that: A rectangular sealing gasket (205) is inserted into the top of the vertical plate (2071), and the rectangular sealing gasket (205) is inserted into the cover plate (204).

Images