Exhaust pipe heat insulation device, exhaust pipe assembly and vehicle

Abstract

The utility model provides an exhaust pipe heat insulation device, an exhaust pipe assembly and a vehicle, the exhaust pipe heat insulation device comprises a heat insulation component, the heat insulation component is sleeved outside an exhaust pipe, the heat insulation component and the exhaust pipe are arranged at an interval to form a first gas flow channel for gas to flow through, and the heat insulation component is provided with a liquid flow channel for liquid to flow through; the temperature detection part is arranged on the outer wall surface of the heat insulation part, is electrically connected with the controller and is used for detecting the real-time temperature of the outer wall surface of the heat insulation part and transmitting the real-time temperature to the controller; the speed adjusting component is arranged on an external liquid supply pipeline communicated with the inlet of the liquid flow channel and electrically connected with the controller, and the controller controls the speed adjusting component to work according to the detection result of the temperature detection component so as to adjust the flow speed of the liquid supplied to the liquid flow channel by the external liquid supply pipeline. The problem that in the prior art, a cooling structure used for cooling an exhaust pipe is poor in cooling effect is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of engine exhaust, in particular to an exhaust pipe heat insulation device, an exhaust pipe assembly and a vehicle. Background Art

[0002] Since the engine generates exhaust gas after combustion, which causes thermal pollution to the environment, a water-cooled exhaust pipe or a three-layer wall exhaust pipe is usually used in the prior art to adjust the temperature of the engine so that the exhaust pipe discharges the exhaust gas at a suitable temperature.

[0003] A water-cooled exhaust pipe can effectively reduce the temperature of the exhaust gas and prevent the engine from overheating. However, while a water-cooled exhaust pipe can reduce external heat radiation, it inevitably wastes the energy of the exhaust gas, especially under partial load conditions, which may make the exhaust gas insufficient to drive the supercharger.

[0004] The three-wall exhaust pipe can effectively insulate and reduce the heat radiation of the exhaust pipe to the surrounding environment, but the structure is complex and requires a larger outer diameter and weight, which limits the design and installation of the overall exhaust device. Utility Model Content

[0005] The main purpose of the utility model is to provide an exhaust pipe heat insulation device, an exhaust pipe assembly and a vehicle, so as to solve the problem that the cooling effect of the cooling structure used for cooling the exhaust pipe in the prior art is poor.

[0006] In order to achieve the above-mentioned purpose, according to the first aspect of the utility model, there is provided an exhaust pipe insulation device, the exhaust pipe insulation device comprising: an insulation component, which is sleeved on the outside of the exhaust pipe, the insulation component and the exhaust pipe are spaced apart to form a first gas flow channel for gas to flow through, and the insulation component is provided with a liquid flow channel for liquid to flow through; a temperature detection component, which is arranged on the outer wall surface of the insulation component and is electrically connected to the controller to detect the real-time temperature of the outer wall surface of the insulation component and transmit it to the controller; a speed regulating component, which is arranged on an external liquid supply pipeline connected to the inlet of the liquid flow channel and is electrically connected to the controller, and the controller controls the operation of the speed regulating component according to the detection result of the temperature detection component to adjust the flow rate of the liquid supplied by the external liquid supply pipeline to the liquid flow channel.

[0007] Furthermore, a second gas flow channel is provided on the heat insulation component, and a liquid flow channel is provided between the second gas flow channel and the first gas flow channel.

[0008] Furthermore, there are multiple liquid flow channels, and the multiple liquid flow channels are arranged at intervals in a direction away from the exhaust pipe, and any two adjacent liquid flow channels are provided with a second gas flow channel.

[0009] Furthermore, the thermal insulation component includes an insulation tube and two connecting flanges respectively located at opposite ends of the insulation tube; the liquid flow channel includes an intermediate liquid flow channel and two end liquid flow channels respectively located at opposite ends of the intermediate liquid flow channel; the intermediate liquid flow channel is located on the insulation tube, and the two end liquid flow channels are respectively located on two connecting flanges and are respectively connected to the inlet and outlet of the external liquid supply pipeline.

[0010] Furthermore, the middle liquid flow channel is an annular flow channel extending along the extension direction of the exhaust pipe; each end liquid flow channel includes a first flow channel section and a second flow channel section that are connected, the first flow channel section is located on the side of the second flow channel section away from the middle liquid flow channel, the extension direction of the first flow channel section is perpendicular to the extension direction of the exhaust pipe, and the extension direction of the second flow channel section is parallel to the extension direction of the exhaust pipe.

[0011] Furthermore, the first gas flow channel includes a first intermediate gas flow channel and two first end gas flow channels respectively located at opposite ends of the first intermediate gas flow channel; the exhaust pipe includes a pipe body and two annular flanges respectively arranged on the outer circumferential surface of the pipe body; the thermal insulation pipe is sleeved outside the pipe body, and the inner wall surface of the thermal insulation pipe is spaced apart from the outer circumferential surface of the pipe body to form the first intermediate gas flow channel; two connecting flanges are sleeved outside the pipe body, and the two connecting flanges are respectively located between the thermal insulation pipe and the two annular flanges to form two first end gas flow channels.

[0012] Furthermore, a second gas flow channel is provided on the insulation component, and the second gas flow channel includes a second intermediate gas flow channel and two second end gas flow channels respectively located at opposite ends of the second intermediate gas flow channel; wherein, the second intermediate gas flow channel is located on the insulation tube, and the two second end gas flow channels are respectively located on two connecting flanges.

[0013] Furthermore, the second intermediate gas flow channel is an annular flow channel extending along the extension direction of the exhaust pipe; each second end gas flow channel includes a third flow channel section and a fourth flow channel section that are connected, the third flow channel section is located on the side of the fourth flow channel section away from the second intermediate gas flow channel, the extension direction of the third flow channel section is perpendicular to the extension direction of the exhaust pipe, and the extension direction of the fourth flow channel section is parallel to the extension direction of the exhaust pipe.

[0014] Furthermore, according to a second aspect of the present utility model, an exhaust pipe assembly is provided, comprising an exhaust pipe and an exhaust pipe heat insulation device arranged outside the exhaust pipe.

[0015] Furthermore, according to a third aspect of the utility model, a vehicle is provided, comprising an engine, wherein an exhaust pipe assembly is arranged on the engine.

[0016] Applying the technical scheme of the utility model, the exhaust pipe insulation device of the utility model comprises: a heat insulation component, which is sleeved on the outside of the exhaust pipe, the heat insulation component and the exhaust pipe are spaced apart to form a first gas flow channel for gas to flow through, and the heat insulation component is provided with a liquid flow channel for liquid to flow through; a temperature detection component, which is arranged on the outer wall surface of the heat insulation component and is electrically connected to the controller, so as to detect the real-time temperature of the outer wall surface of the heat insulation component and transmit it to the controller; a speed regulating component, which is arranged on an external liquid supply pipeline connected to the inlet of the liquid flow channel and is electrically connected to the controller, and the controller controls the operation of the speed regulating component according to the detection result of the temperature detection component to adjust the flow rate of the liquid supplied by the external liquid supply pipeline to the liquid flow channel. In this way, the exhaust pipe insulation device provided by the utility model effectively blocks the transfer of heat by arranging multiple flow channels on the outside of the exhaust pipe to form multiple insulation layers, and controls the flow rate of the liquid supplied by the external liquid supply pipeline to the liquid flow channel according to the temperature of the liquid in the liquid flow channel by arranging a temperature detection component and a speed regulating component, thereby controlling the heat exchange efficiency of the exhaust pipe insulation device, and achieving the effect of stabilizing the insulation temperature within a specified range under different diesel engine operating conditions, saving exhaust gas energy in the greatest strategic way, and achieving the purpose of reducing the heat radiation of the exhaust pipe to the external environment. It can effectively solve the problem of poor cooling effect of the cooling structure used for cooling the exhaust pipe in the prior art, solve the problem that the water-cooled exhaust pipe used for cooling the exhaust pipe in the prior art wastes the energy of the exhaust gas, and may cause insufficient driving energy of the exhaust gas for the supercharger under partial load conditions, and solve the problem that the three-layer wall exhaust pipe used for cooling the exhaust pipe in the prior art is complex in structure, which restricts installation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] Figure 1 A cross-sectional view of an embodiment of an exhaust pipe heat insulation device according to the utility model is shown;

[0019] Figure 2 Shows Figure 1 A partial enlarged view of the exhaust pipe insulation device shown;

[0020] Figure 3 Shows that there is Figure 1 A control flow chart of a vehicle with an exhaust pipe insulation device is shown.

[0021] The above drawings include the following reference numerals:

[0022] 10. Insulation component; 101. Liquid flow channel; 1011. Intermediate liquid flow channel; 1012. End liquid flow channel; 102. Second gas flow channel; 1021. Second intermediate gas flow channel; 1022. Second end gas flow channel; 20. Exhaust pipe; 201. Pipe body; 202. Annular flange; 30. First gas flow channel; 301. First intermediate gas flow channel; 302. First end gas flow channel; 40. Temperature detection component; 50. Insulation tube; 60. Connecting flange; 70. Speed ​​regulating component. DETAILED DESCRIPTION

[0023] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0024] like Figures 1 to 3 As shown, the exhaust pipe insulation device of the utility model includes: an insulation component 10, the insulation component 10 is sleeved outside the exhaust pipe 20, the insulation component 10 and the exhaust pipe 20 are spaced apart to form a first gas flow channel 30 for gas to flow through, and the insulation component 10 is provided with a liquid flow channel 101 for liquid to flow through; a temperature detection component 40, the temperature detection component 40 is arranged on the outer wall surface of the insulation component 10 and is electrically connected to the controller, so as to detect the real-time temperature of the outer wall surface of the insulation component 10 and transmit it to the controller; a speed regulating component 70, the speed regulating component 70 is arranged on an external liquid supply pipeline connected to the inlet of the liquid flow channel 101 and is electrically connected to the controller, and the controller controls the operation of the speed regulating component 70 according to the detection result of the temperature detection component 40, so as to adjust the flow rate of the liquid supplied by the external liquid supply pipeline to the liquid flow channel 101.

[0025] In this way, the exhaust pipe insulation device provided by the utility model effectively blocks the transfer of heat by arranging multiple flow channels on the outside of the exhaust pipe 20 to form multiple insulation layers, and controls the flow rate of the liquid supplied by the external liquid supply pipeline to the liquid flow channel 101 according to the temperature of the liquid in the liquid flow channel 101 by arranging the temperature detection component 40 and the speed regulation component 70, thereby controlling the heat exchange efficiency of the exhaust pipe insulation device, and achieving the effect of stabilizing the insulation temperature within the prescribed range under different diesel engine operating conditions, saving exhaust gas energy in the most strategic way, and achieving the purpose of reducing the heat radiation of the exhaust pipe to the external environment. It can effectively solve the problem of poor cooling effect of the cooling structure used for cooling the exhaust pipe in the prior art, solve the problem that the water-cooled exhaust pipe used for cooling the exhaust pipe in the prior art wastes the energy of the exhaust gas, and may cause insufficient driving energy of the exhaust gas to the supercharger under partial load conditions, and solve the problem that the three-layer wall exhaust pipe used for cooling the exhaust pipe in the prior art is complex in structure, which restricts installation and maintenance.

[0026] Specifically, the controller may be a control component of the exhaust pipe heat insulation device itself, or may be a control component in an engine or vehicle having the exhaust pipe heat insulation device.

[0027] like Figure 1 As shown, a second gas flow channel 102 is provided on the heat insulation component 10 , and a liquid flow channel 101 is provided between the second gas flow channel 102 and the first gas flow channel 30 .

[0028] Optionally, the number of the liquid flow channels 101 may be one or more, and the number of the second gas flow channels 102 may also be one or more.

[0029] In an embodiment of the present invention, there are multiple liquid flow channels 101 , which are spaced apart in a direction away from the exhaust pipe 20 , and any two adjacent liquid flow channels 101 are provided with a second gas flow channel 102 .

[0030] like Figure 1 As shown, a heat insulating component 10 is sleeved on the outer peripheral surface of the exhaust pipe 20, and a first gas flow channel 30 for gas to pass through is formed between the heat insulating component 10 and the exhaust pipe 20, and two liquid flow channels 101 and a second gas flow channel 102 are arranged in the heat insulating component 10, and the second gas flow channel 102 is located between the two liquid flow channels 101; at this time, the path of heat transfer of the exhaust gas in the exhaust pipe 20 to the environment is: exhaust pipe 20→first gas flow channel 30→first liquid flow channel 101→second gas flow channel 102→second liquid flow channel 101. Because the efficiency of heat radiation is much lower than that of heat conduction, the path of heat transfer of the exhaust gas to the environment during multiple heat transfer conversions can be effectively blocked by the exhaust pipe insulation device of the present invention.

[0031] like Figure 1 As shown, the insulation component 10 includes an insulation tube 50 and two connecting flanges 60 respectively located at the opposite ends of the insulation tube 50; the liquid flow channel 101 includes an intermediate liquid flow channel 1011 and two end liquid flow channels 1012 respectively located at the opposite ends of the intermediate liquid flow channel 1011; the intermediate liquid flow channel 1011 is located on the insulation tube 50, and the two end liquid flow channels 1012 are respectively located on the two connecting flanges 60 and are respectively connected to the inlet and outlet of the external liquid supply pipeline.

[0032] Specifically, the middle liquid flow channel 1011 is an annular flow channel extending along the extension direction of the exhaust pipe 20; each end liquid flow channel 1012 includes a first flow channel section and a second flow channel section that are connected, the first flow channel section is located on the side of the second flow channel section away from the middle liquid flow channel 1011, the extension direction of the first flow channel section is perpendicular to the extension direction of the exhaust pipe 20, and the extension direction of the second flow channel section is parallel to the extension direction of the exhaust pipe 20.

[0033] Optionally, each connecting flange 60 is integrally formed with the thermal insulation pipe 50 or is detachably connected thereto.

[0034] Since the flow rate of the liquid in the liquid flow channel 101 of the insulation component 10 is also an important parameter affecting the heat exchange efficiency, the difference in liquid flow rate can be used to adjust the heat exchange efficiency in the insulation component 10, so that the insulation temperature under different engine operating conditions is stabilized within a certain range.

[0035] like Figure 2 As shown, each liquid flow channel 101 of the exhaust pipe insulation device of the utility model is respectively connected to the inlet and outlet of the external liquid supply pipeline through the first flow channel section of the end liquid flow channel 1012 on the two connecting flanges 60 on the opposite sides of the middle liquid flow channel 1011, and a temperature detection component 40 is arranged in the end liquid flow channel 1012 connected to the outlet of the external liquid supply pipeline for detecting the temperature of the liquid in each liquid flow channel 101, and a speed regulating component 70 is arranged on the external liquid supply pipeline, and the middle liquid flow channel 1011 is connected through the second flow channel section, so that the signal of the temperature detection component 40 is transmitted to the speed regulating component 70 according to the detection result, so as to adjust the flow rate of the liquid supplied by the external liquid supply pipeline to each liquid flow channel 101 through the speed regulating component 70, and further adjust the heat transfer.

[0036] like Figure 1 As shown, the first gas flow channel 30 includes a first intermediate gas flow channel 301 and two first end gas flow channels 302 respectively located at opposite ends of the first intermediate gas flow channel 301; the exhaust pipe 20 includes a pipe body 201 and two annular flanges 202 respectively arranged on the outer circumference of the pipe body 201; the insulation tube 50 is sleeved outside the pipe body 201, and the inner wall surface of the insulation tube 50 is spaced from the outer circumference of the pipe body 201 to form the first intermediate gas flow channel 301; the two connecting flanges 60 are sleeved outside the pipe body 201, and the two connecting flanges 60 are respectively located between the insulation tube 50 and the two annular flanges 202 to form two first end gas flow channels 302.

[0037] Specifically, a second gas flow channel 102 is provided on the insulation component 10, and the second gas flow channel 102 includes a second intermediate gas flow channel 1021 and two second end gas flow channels 1022 respectively located at opposite ends of the second intermediate gas flow channel 1021; wherein, the second intermediate gas flow channel 1021 is located on the insulation tube 50, and the two second end gas flow channels 1022 are respectively located on two connecting flanges 60.

[0038] Specifically, the second intermediate gas flow channel 1021 is an annular flow channel extending along the extension direction of the exhaust pipe 20; each second end gas flow channel 1022 includes a third flow channel section and a fourth flow channel section that are connected, and the third flow channel section is located on the side of the fourth flow channel section away from the second intermediate gas flow channel 1021, and the extension direction of the third flow channel section is perpendicular to the extension direction of the exhaust pipe 20, and the extension direction of the fourth flow channel section is parallel to the extension direction of the exhaust pipe 20.

[0039] Optionally, the temperature detection component 40 is a temperature sensor.

[0040] The utility model provides an exhaust pipe assembly, comprising an exhaust pipe 20 and an exhaust pipe heat insulation device arranged outside the exhaust pipe 20 .

[0041] The utility model also provides a vehicle, comprising an engine, on which an exhaust pipe assembly is arranged.

[0042] like Figure 3 As shown, the working principle of the exhaust pipe insulation device of the present invention is: the temperature detection component 40 detects the real-time temperature T1 of the outer wall of the insulation component 10, and feeds back the detection result to the controller. When the controller determines that the real-time ambient temperature T1 is higher than the critical value T0, the controller sends an instruction to the speed regulating component 70 to control the speed regulating component 70 to adjust the flow rate of the liquid in each liquid flow channel 101, so as to cause the change of the heat transfer coefficient of the heat conduction process of the exhaust pipe insulation device through the change of the flow rate of the refrigerant in the exhaust pipe insulation device.

[0043] For example: when the controller determines that T1>T0, the controller sends a command to the speed regulating component 70 to increase the liquid flow rate in the liquid flow channel 101 to improve the heat exchange efficiency in the liquid flow channel 101, thereby reducing the heat transferred to the gas flow channel after the exhaust gas passes through the liquid flow channel 101, and ultimately making the real-time ambient temperature T1 less than the critical value T0; when the controller determines that T1<T0, the controller sends a command to the speed regulating component 70 to reduce the liquid flow rate in the liquid flow channel 101 to reduce the heat exchange efficiency in the liquid flow channel 101, thereby increasing the exhaust gas heat and the heat exchange efficiency of the liquid flow channel 101, and ultimately reducing the exhaust gas heat.

[0044] In summary, the exhaust pipe insulation device of the present invention solves the problem of poor cooling effect of the cooling structure used to cool the exhaust pipe in the prior art, and can adjust the heat exchange efficiency in the insulation component 10 by adjusting the flow rate of the liquid supplied by the external liquid supply pipeline to the liquid channel 101, so as to adjust the heat transfer between the exhaust pipe 20 and the external environment, so that the insulation temperature under different engine operating conditions can be stabilized within a certain range.

[0045] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0046] like Figure 1 to Figure 2 As shown, a heat insulating component 10 is sleeved outside the exhaust pipe 20, and the heat insulating component 10 and the exhaust pipe 20 are spaced apart to form a first gas flow channel 30 for gas to flow through, and a liquid flow channel 101 for liquid to flow through is provided on the heat insulating component 10; a temperature detecting component 40, the temperature detecting component 40 is arranged on the outer wall surface of the heat insulating component 10 and is electrically connected to the controller, so as to detect the real-time temperature of the outer wall surface of the heat insulating component 10 and transmit it to the controller; a speed regulating component 70, the speed regulating component 70 is arranged on an external liquid supply pipeline connected to the inlet of the liquid flow channel 101 and is electrically connected to the controller, and the controller controls the operation of the speed regulating component 70 according to the detection result of the temperature detecting component 40, so as to adjust the flow rate of the liquid supplied by the external liquid supply pipeline to the liquid flow channel 101. In this way, the exhaust pipe insulation device provided by the utility model effectively blocks the transfer of heat by arranging multiple flow channels on the outside of the exhaust pipe 20 to form multiple insulation layers, and controls the flow rate of the liquid supplied by the external liquid supply pipeline to the liquid flow channel 101 according to the temperature of the liquid in the liquid flow channel 101 by arranging the temperature detection component 40 and the speed regulation component 70, thereby controlling the heat exchange efficiency of the exhaust pipe insulation device, and achieving the effect of stabilizing the insulation temperature within the prescribed range under different diesel engine operating conditions, saving exhaust gas energy in the most strategic way, and achieving the purpose of reducing the heat radiation of the exhaust pipe to the external environment. It can effectively solve the problem of poor cooling effect of the cooling structure used for cooling the exhaust pipe in the prior art, solve the problem that the water-cooled exhaust pipe used for cooling the exhaust pipe in the prior art wastes the energy of the exhaust gas, and may cause insufficient driving energy of the exhaust gas to the supercharger under partial load conditions, and solve the problem that the three-layer wall exhaust pipe used for cooling the exhaust pipe in the prior art is complex in structure, which restricts installation and maintenance.

[0047] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0048] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0049] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0050] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0051] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0052] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An exhaust pipe insulation device, characterized in that: include: a heat insulating component (10), the heat insulating component (10) being sleeved outside the exhaust pipe (20), the heat insulating component (10) and the exhaust pipe (20) being spaced apart to form a first gas flow channel (30) for gas to flow through, and the heat insulating component (10) being provided with a liquid flow channel (101) for liquid to flow through; a temperature detection component (40), the temperature detection component (40) being arranged on the outer wall surface of the heat insulating component (10) and being electrically connected to the controller, so as to detect the real-time temperature of the outer wall surface of the heat insulating component (10) and transmit the temperature to the controller; A speed regulating component (70), wherein the speed regulating component (70) is arranged on an external liquid supply pipeline connected to the inlet of the liquid flow channel (101) and is electrically connected to the controller, and the controller controls the operation of the speed regulating component (70) according to the detection result of the temperature detection component (40) to adjust the flow rate of the liquid supplied by the external liquid supply pipeline to the liquid flow channel (101).

2. The exhaust pipe insulation device according to claim 1, characterized in that: The heat insulation component (10) is provided with a second gas flow channel (102), and the liquid flow channel (101) is provided between the second gas flow channel (102) and the first gas flow channel (30).

3. The exhaust pipe insulation device according to claim 2, characterized in that: The number of the liquid flow channels (101) is plural, and the plural liquid flow channels (101) are arranged at intervals in a direction away from the exhaust pipe (20), and any two adjacent liquid flow channels (101) are provided with the second gas flow channel (102).

4. The exhaust pipe insulation device according to claim 1, characterized in that: The heat insulation component (10) comprises a heat insulation pipe (50) and two connecting flanges (60) respectively located at two opposite ends of the heat insulation pipe (50); The liquid flow channel (101) comprises an intermediate liquid flow channel (1011) and two end liquid flow channels (1012) respectively located at opposite ends of the intermediate liquid flow channel (1011); the intermediate liquid flow channel (1011) is located on the insulation pipe (50), and the two end liquid flow channels (1012) are respectively located on the two connecting flanges (60) and are respectively connected to the inlet and outlet of the external liquid supply pipeline.

5. The exhaust pipe insulation device according to claim 4, characterized in that: The intermediate liquid flow channel (1011) is an annular flow channel extending along the extension direction of the exhaust pipe (20); Each of the end liquid flow channels (1012) comprises a first flow channel section and a second flow channel section that are connected to each other, the first flow channel section being located on a side of the second flow channel section that is away from the middle liquid flow channel (1011), the extension direction of the first flow channel section being perpendicular to the extension direction of the exhaust pipe (20), and the extension direction of the second flow channel section being parallel to the extension direction of the exhaust pipe (20).

6. The exhaust pipe insulation device according to claim 4, characterized in that: The first gas flow channel (30) comprises a first middle gas flow channel (301) and two first end gas flow channels (302) respectively located at opposite ends of the first middle gas flow channel (301); The exhaust pipe (20) comprises a pipe body (201) and two annular flanges (202) respectively arranged on the outer peripheral surface of the pipe body (201) at intervals; The heat-insulating tube (50) is sleeved outside the tube body (201), and the inner wall surface of the heat-insulating tube (50) is spaced apart from the outer peripheral surface of the tube body (201) to form the first intermediate gas flow channel (301); The two connecting flanges (60) are sleeved outside the pipe body (201), and the two connecting flanges (60) are respectively located between the insulation pipe (50) and the two annular flanges (202) to form the two first end gas flow channels (302).

7. The exhaust pipe insulation device according to claim 4, characterized in that: The thermal insulation component (10) is provided with a second gas flow channel (102), and the second gas flow channel (102) comprises a second intermediate gas flow channel (1021) and two second end gas flow channels (1022) respectively located at opposite ends of the second intermediate gas flow channel (1021); wherein the second intermediate gas flow channel (1021) is located on the thermal insulation tube (50), and the two second end gas flow channels (1022) are respectively located on the two connecting flanges (60).

8. The exhaust pipe insulation device according to claim 7, characterized in that: The second intermediate gas flow channel (1021) is an annular flow channel extending along the extension direction of the exhaust pipe (20); Each of the second end gas flow channels (1022) comprises a third flow channel section and a fourth flow channel section that are connected to each other, the third flow channel section being located on a side of the fourth flow channel section that is away from the second intermediate gas flow channel (1021), the extension direction of the third flow channel section being perpendicular to the extension direction of the exhaust pipe (20), and the extension direction of the fourth flow channel section being parallel to the extension direction of the exhaust pipe (20).

9. An exhaust pipe assembly, characterized in that: It comprises an exhaust pipe (20) and an exhaust pipe heat insulation device arranged outside the exhaust pipe (20), wherein the exhaust pipe heat insulation device is the exhaust pipe heat insulation device according to any one of claims 1 to 8.

10. A vehicle, characterized in that: The invention comprises an engine, on which the exhaust pipe assembly according to claim 9 is arranged.

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