Heat insulation device for exhaust pipe of engine

Abstract

The utility model discloses an engine exhaust pipe heat insulation device, which relates to the technical field of engine peripherals and comprises an exhaust pipe body, a hush pipe is mounted outside the exhaust pipe body, a limit structure is rotatably mounted at the upper end of the outside of the hush pipe, and a heat insulation shell with an open lower end is mounted inside the limit structure. A heat insulation bin is installed outside the heat insulation shell, the outer portion of the heat insulation bin is fixedly connected with the exhaust pipe body through a connecting rod, a plurality of rotating rings are rotationally connected between the heat insulation shell and the silencing pipe, and a plurality of heat conduction metal rods are jointly inserted between the rotating rings. A series of structures are arranged, a part of heat in the heat insulation shell is transmitted through the heat conduction metal rod, other heat in the heat insulation shell is blocked through the heat insulation bin, the influence of the heat in the heat insulation shell on the outside is reduced, and people are prevented from being scalded and mistakenly touched.

Description

Technical Field

[0001] This utility model relates to the field of engine peripheral technology, specifically to an engine exhaust pipe heat insulation device. Background Technology

[0002] The exhaust pipe is part of the engine's exhaust system, which mainly includes the exhaust manifold, exhaust pipe, and muffler. The catalytic converter, which controls engine pollutant emissions, is also usually installed in the exhaust system. The exhaust pipe generally includes a front exhaust pipe and a rear exhaust pipe. Some parts of the exhaust pipe and the muffler are installed on the outside of the vehicle body, mainly to reduce the noise generated during exhaust. However, when the exhaust pipe is vented outward, the airflow rapidly collides back and forth inside the muffler, generating a lot of heat. The existing muffler lacks heat insulation devices to control the heat. When users or strangers accidentally touch the external exhaust pipe, they are very likely to be burned by the exhaust pipe and muffler. Utility Model Content

[0003] The purpose of this invention is to provide an engine exhaust pipe heat insulation device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an engine exhaust pipe heat insulation device, comprising an exhaust pipe body, a muffler pipe installed on the outside of the exhaust pipe body, a limiting structure rotatably installed on the upper outer end of the muffler pipe, a heat insulation shell with an open lower end installed inside the limiting structure, a heat insulation chamber installed on the outside of the heat insulation shell, the heat insulation chamber being fixedly connected to the exhaust pipe body via a connecting rod, a plurality of rotating rings rotatably connected between the heat insulation shell and the muffler pipe, a plurality of heat-conducting metal rods being inserted into the plurality of rotating rings, the ends of the heat-conducting metal rods being in contact with the outside air, the upper ends of the plurality of heat-conducting metal rods being in contact with the bottom end of the limiting structure, a driven gear ring fixedly installed on the upper outer end of the limiting structure, a drive gear meshing with the driven gear ring, a drive motor being connected to the lower end of the drive gear via a rotating shaft, and the drive motor being connected to the outer wall of the heat insulation chamber via the outer shell.

[0005] Preferably, the heat insulation chamber is filled with coolant, and an installation shell is fixedly installed on the outer wall of the heat insulation chamber. A circulating water pump is installed inside the installation shell. Two installation blocks are symmetrically installed outside the heat insulation chamber and on the outer side of the installation shell. The installation blocks have cavities that communicate with the inside of the heat insulation chamber. One end of each of the two installation blocks is connected to a water guide pipe. The two water guide pipes pass through the upper and lower ends of the installation shell and are connected to the circulating water pump.

[0006] Preferably, the limiting structure includes a first limiting ring, a connecting ring, and a second limiting ring. The connecting ring is rotatably connected to the outer wall of the muffler pipe, and a first limiting ring and a second limiting ring are respectively installed at the upper and lower ends of the connecting ring.

[0007] Preferably, the upper end of the mounting housing is engaged between the first limiting ring and the second limiting ring by an inwardly extending protruding ring, and is rotatably connected to the other side wall of the connecting ring, and the upper ends of the plurality of heat-conducting metal rods are connected to the lower ends of the second limiting ring.

[0008] Preferably, the upper end of the heat insulation chamber is equipped with a circular array of multiple L-shaped limiting plates. The longitudinal plates of the limiting plates are connected to the heat insulation chamber, and the transverse plates of the limiting plates extend to the upper end of the driven toothed ring and are slidably connected to the driven toothed ring.

[0009] Preferably, the surface array of the heat insulation chamber is equipped with multiple raised heat-reducing sheets.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] This engine exhaust pipe heat insulation device uses a limiting structure installed on the outside of the muffler pipe. This limiting structure can rotate outside the muffler pipe. A heat insulation shell is internally connected to the limiting structure. A drive motor drives a rotating shaft and a drive gear to rotate. The drive gear drives a driven gear ring to rotate, which in turn drives the limiting structure and multiple heat-conducting metal rods to rotate. The heat-conducting metal rods absorb heat emitted from inside the muffler pipe and, during continuous rotation, transfer some of the heat from the metal rods to the outside air. A heat insulation chamber is installed outside the heat insulation shell, and the chamber contains circulating coolant. The coolant further blocks heat from the inside of the heat insulation shell. By using heat-conducting metal rods to transfer some of the heat from inside the heat insulation shell, and then using the heat insulation chamber to block other heat from inside the shell, the impact of the heat from inside the shell on the outside environment is reduced, preventing burns from accidental contact. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the rotating ring and the heat-conducting metal rod of this utility model;

[0014] Figure 3 This is a schematic diagram of the fixing structure of this utility model;

[0015] Figure 4 This is a schematic diagram of the structure of the heat insulation shell and the raised ring of this utility model.

[0016] In the diagram: 1. Exhaust pipe body; 2. Muffler pipe; 3. Heat insulation chamber; 4. Limiting structure; 401. First limiting ring; 402. Connecting ring; 403. Second limiting ring; 5. Water guide pipe; 6. Mounting block; 7. Mounting housing; 8. Drive gear; 9. Drive motor; 10. Driven gear ring; 11. Heat insulation housing; 12. Rotating ring; 13. Heat-conducting metal rod; 14. Raised heat-retarding plate; 15. Limiting plate; 16. Raised ring. Detailed Implementation

[0017] 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.

[0018] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] like Figures 1 to 4As shown, the engine exhaust pipe heat insulation device of this embodiment includes an exhaust pipe body 1, and a muffler pipe 2 is installed on the outside of the exhaust pipe body 1. Both the exhaust pipe body 1 and the muffler pipe 2 are existing mature technologies. A limiting structure 4 is rotatably installed on the upper part of the muffler pipe 2. The limiting structure 4 can rotate on the surface of the muffler pipe 2 under the action of external force. It can be connected by a guide rail. The specific connection method can be adjusted according to the user's needs. A heat insulation shell 11 with an open lower end is installed inside the limiting structure 4. The upper end of the heat insulation shell 11 is connected to the limiting structure 4, and the lower end is open and in contact with the outside air. A heat insulation chamber 3 is installed on the outside of the heat insulation shell 11. The heat insulation shell 11 and the heat insulation chamber 3 are fixedly connected. The heat insulation chamber 3 is a closed structure and is connected to the exhaust pipe body through a connecting rod. The body 1 is fixedly connected, thus fixing the position of the heat insulation chamber 3. The heat insulation shell 11 is also fixedly connected to the heat insulation chamber 3, thus fixing its position as well. Multiple rotating rings 12 are rotatably connected between the heat insulation shell 11 and the silencer pipe 2. Multiple heat-conducting metal rods 13 are inserted into the rotating rings 12. The ends of the heat-conducting metal rods 13 are in contact with the outside air, and the upper ends of the multiple heat-conducting metal rods 13 are in contact with the bottom end of the limiting structure 4. The multiple rotating rings 12 can limit the structure of the multiple heat-conducting metal rods 13. Furthermore, the rotating rings 12 are rotatably connected between the heat insulation shell 11 and the silencer pipe 2. The rotating rings 12 can close the lower opening of the heat insulation shell 11, ensuring that the heat inside the heat insulation shell 11 can only be transferred to the outside through the heat-conducting metal rods 13. It should be noted that... Figure 2 As shown, the outer wall of the heat insulation shell 11 covers the outside of the heat-conducting metal rod 13, so that the end of the heat-conducting metal rod 13 will be in contact with the air, but will still be wrapped by the outer wall of the heat insulation shell 11. This can reduce the probability of accidental contact between the heat-conducting metal rod 13 and unrelated personnel to a certain extent. A driven gear ring 10 is fixedly installed on the outer side of the upper end of the limiting structure 4. The driven gear ring 10 is meshed with the drive gear 8. The lower end of the drive gear 8 is connected to the drive motor 9 through the rotating shaft. The drive motor 9 is connected to the outer wall of the heat insulation chamber 3 through the outer shell. The drive motor 9 drives the rotating shaft and the drive gear 8 to rotate. The drive gear 8 drives the driven gear ring 10 to rotate. The driven gear ring 10 drives the limiting structure 4 and multiple heat-conducting metal rods 13 to rotate. The heat-conducting metal rods 13 absorb the heat emitted from the inside of the silencer tube 2 and transfer some of the heat from the heat-conducting metal rods 13 to the outside air during continuous rotation.

[0020] Specifically, the heat insulation chamber 3 is filled with coolant. A mounting shell 7 is fixedly installed on the outer wall of the heat insulation chamber 3. A circulating water pump is installed inside the mounting shell 7. Two mounting blocks 6 are symmetrically installed on the outside of the heat insulation chamber 3 and on the outer side of the mounting shell 7. The interior of the mounting blocks 6 has a cavity that communicates with the interior of the heat insulation chamber 3. One end of each mounting block 6 is connected to a water guide pipe 5. The two water guide pipes 5 pass through the upper and lower ends of the mounting shell 7 and are connected to the circulating water pump. The coolant is a mixture of various components, which is a relatively mature technology. It includes a coolant composed of base fluid, rust inhibitor, scale inhibitor, defoamer, and colorant. The specific type can be changed according to the user's needs. The circulating water pump drives the coolant to circulate inside the heat insulation chamber 3 and inside the two water guide pipes 5. The heat absorbed by the coolant inside the heat insulation chamber 3 will be dissipated to the outside air after moving into the water guide pipes 5, thereby reducing the heat inside the heat insulation chamber 3.

[0021] Furthermore, the limiting structure 4 includes a first limiting ring 401, a connecting ring 402, and a second limiting ring 403. The connecting ring 402 is rotatably connected to the outer wall of the silencer pipe 2. A first limiting ring 401 and a second limiting ring 403 are respectively installed at the upper and lower ends of the connecting ring 402. The upper end of the mounting housing 7 is engaged between the first limiting ring 401 and the second limiting ring 403 by a protruding ring 16 extending inward, and is rotatably connected to the other side wall of the connecting ring 402. The upper ends of the plurality of heat-conducting metal rods 13 and the second limiting ring 403 are also connected to the connecting ring 402. The lower end of the limiting ring 403 is connected to the drive motor 9, which drives the driven gear ring 10 to rotate. The driven gear ring 10 drives the first limiting ring 401 to rotate, which in turn drives the connecting ring 402 and the second limiting ring 403 to rotate. The second limiting ring 403 drives multiple heat-conducting metal rods 13 to rotate. The heat-conducting metal rods 13 can be made of copper, which has good heat conduction effect. When the limiting structure 4 rotates, the heat insulation shell 11 and the heat insulation chamber 3 are fixedly connected to the exhaust pipe through the connecting rod and will not rotate due to the rotation of the limiting structure 4.

[0022] Furthermore, the upper circular array of the heat insulation chamber 3 is equipped with multiple L-shaped limiting plates 15. The longitudinal plates of the limiting plates 15 are connected to the heat insulation chamber 3, and the transverse plates of the limiting plates 15 extend to the upper end of the driven gear ring 10 and are slidably connected to the driven gear ring 10. Multiple raised heat-reducing sheets 14 are arrayed on the surface of the heat insulation chamber 3. The limiting plates 15 can play a certain limiting effect when the driven gear ring 10 rotates. The raised heat-reducing sheets 14 are made of rubber, which can prevent unauthorized personnel from directly contacting the heat insulation chamber 3.

[0023] The method of use in this embodiment is as follows: A limiting structure 4 is installed on the outside of the muffler 2. The limiting structure 4 can rotate outside the muffler 2. A heat insulation shell 11 is rotatably connected inside the limiting structure 4. The drive motor 9 drives the rotating shaft and the drive gear 8 to rotate. The drive gear 8 drives the driven gear ring 10 to rotate. The driven gear ring 10 drives the limiting structure 4 and multiple heat-conducting metal rods 13 to rotate. The heat-conducting metal rods 13 absorb the heat emitted from inside the muffler 2 and transfer some of the heat from the heat-conducting metal rods 13 to the outside air during continuous rotation. A heat insulation chamber 3 is installed on the outside of the heat insulation shell 11. The heat insulation chamber 3 is filled with circulating coolant. The coolant can further block the heat inside the heat insulation shell 11. By setting up the heat-conducting metal rods 13 to transfer some of the heat inside the heat insulation shell 11, and by using the heat insulation chamber 3 to block other heat inside the heat insulation shell 11, the influence of the heat inside the heat insulation shell 11 on the outside environment is reduced, and burns to people who accidentally touch it are avoided.

[0024] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the 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 this utility model should be included within the protection scope of this utility model.

Claims

1. A heat insulation device for an engine exhaust pipe, comprising an exhaust pipe body (1), wherein a muffler pipe (2) is installed on the outside of the exhaust pipe body (1), characterized in that: A limiting structure (4) is rotatably installed on the upper outer end of the muffler pipe (2). A heat insulation shell (11) with an open lower end is installed inside the limiting structure (4). A heat insulation chamber (3) is installed on the outside of the heat insulation shell (11). The outside of the heat insulation chamber (3) is fixedly connected to the exhaust pipe body (1) through a connecting rod. Multiple rotating rings (12) are rotatably connected between the heat insulation shell (11) and the muffler pipe (2). Multiple heat-conducting metal rods (13) are inserted into the multiple rotating rings (12). The end of the heat-conducting metal rod (13) is in contact with the outside air. The upper ends of the multiple heat-conducting metal rods (13) are in contact with the bottom end of the limiting structure (4). The limiting structure (4) is fixedly installed on the outside of the upper end of the heat insulation shell (11) with a driven gear ring (10). The driven gear ring (10) is meshed with a drive gear (8). The lower end of the drive gear (8) is connected to a drive motor (9) through a rotating shaft. The drive motor (9) is connected to the outer wall of the heat insulation chamber (3) through the outer shell.

2. The engine exhaust pipe heat insulation device according to claim 1, characterized in that: The heat insulation chamber (3) is filled with coolant. An installation housing (7) is fixedly installed on the outer wall of the heat insulation chamber (3). A circulating water pump is installed inside the installation housing (7). Two installation blocks (6) are symmetrically installed outside the heat insulation chamber (3) and on the outside of the installation housing (7). The installation blocks (6) have cavities that communicate with the inside of the heat insulation chamber (3). One end of each of the two installation blocks (6) is connected to a water guide pipe (5). The two water guide pipes (5) pass through the upper and lower ends of the installation housing (7) and are connected to the circulating water pump.

3. The engine exhaust pipe heat insulation device according to claim 2, characterized in that: The limiting structure (4) includes a first limiting ring (401), a connecting ring (402), and a second limiting ring (403). The connecting ring (402) is rotatably connected to the outer wall of the silencer pipe (2). A first limiting ring (401) and a second limiting ring (403) are respectively installed at the upper and lower ends of the connecting ring (402).

4. The engine exhaust pipe heat insulation device according to claim 3, characterized in that: The upper end of the mounting housing (7) is engaged between the first limiting ring (401) and the second limiting ring (403) by a protruding ring (16) extending inward, and is rotatably connected to the other side wall of the connecting ring (402). The upper ends of the plurality of heat-conducting metal rods (13) are connected to the lower ends of the second limiting ring (403).

5. The engine exhaust pipe heat insulation device according to claim 1, characterized in that: The upper end of the heat insulation chamber (3) is equipped with a circular array of multiple L-shaped limiting plates (15). The longitudinal plate of the limiting plate (15) is connected to the heat insulation chamber (3), and the transverse plate of the limiting plate (15) extends to the upper end of the driven toothed ring (10) and is slidably connected to the driven toothed ring (10).

6. The engine exhaust pipe heat insulation device according to claim 1, characterized in that: The surface array of the heat insulation chamber (3) is equipped with multiple raised heat-reducing plates (14).

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