Thermal insulation device
By installing a heat insulation structure and flow guide holes on the exhaust manifold, the problem of short service life of the exhaust manifold is solved, efficient heat dissipation and cooling are achieved, the occurrence of low-cycle fatigue cracks is reduced, and the service life of the exhaust manifold is extended.
Patent Information
- Application Number
- CN202520120451.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-17
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2035-01-17
AI Technical Summary
The exhaust manifold suffers damage to other components due to the scouring effect of high-temperature exhaust gases, and the heat insulation cover reduces the heat dissipation performance of the exhaust manifold, resulting in a shorter service life.
Design a heat insulation device including a heat insulation structure and a flow guide hole. The heat insulation structure is connected to the exhaust manifold through the flow guide hole. The aperture ratio of the flow guide hole satisfies D1=D2. External cooling gas flows into the exhaust manifold through the flow guide hole to achieve heat dissipation, while accelerating the flow rate of the cooling gas and improving the heat dissipation efficiency.
It effectively isolates the heat from the exhaust manifold from other components, improves the heat dissipation efficiency of the exhaust manifold, reduces the probability of low-cycle fatigue cracks, and extends the service life of the exhaust manifold.
Smart Images
Figure CN223562904U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to an engine technical field, specifically, relate to a heat insulation device. BACKGROUND
[0002] At present, in order to ensure the healthy and efficient operation of engine, exhaust system is usually equipped on engine, and this system is responsible for handling the exhaust gas generated by engine and discharging it. Exhaust manifold, as a key component of exhaust system, is connected with engine cylinder cover and leads the exhaust of each cylinder into exhaust manifold. Because exhaust manifold is directly washed by high-temperature exhaust gas of engine during working process, exhaust manifold is always in high-temperature state, so that other components close to exhaust manifold are also in high-temperature state, increasing the damage rate of other components.
[0003] In the prior art, in order to avoid the damage of exhaust manifold accessories, workers usually set a layer of heat shield on the outer surface of exhaust manifold to separate exhaust manifold from other components, avoiding the heat transfer of exhaust manifold to other components, thereby prolonging the service life of other components.
[0004] However, the above setting of heat shield reduces the heat dissipation performance of exhaust manifold accordingly, and further causes the low-cycle fatigue crack failure of exhaust manifold, shortening the service life of exhaust manifold. CONTENT OF THE UTILITY MODEL
[0005] The main purpose of the utility model is to provide a heat insulation device to solve the problem of short service life of exhaust manifold in the prior art.
[0006] In order to achieve the above purpose, the utility model provides a heat insulation device, which comprises: a heat insulation structure arranged on a to-be-insulated part, the heat insulation structure having a flow guide hole, the flow guide hole comprising a first hole section and a second hole section in communication with each other, the second hole section being located on the side of the first hole section away from the heat insulation structure, and the second hole section having a preset distance between its end away from the first hole section and the to-be-insulated part; wherein the hole diameter D1 of the first hole section and the hole diameter D2 of the second hole section satisfy the relationship D1=2D2.
[0007] Further, the heat insulation structure is plate-shaped, and the heat insulation structure further has a mounting hole for connecting the heat insulation structure and the to-be-insulated part through a fastener.
[0008] Further, the heat insulation structure comprises a first heat insulation part, a second heat insulation part and a third heat insulation part connected in sequence, and the second heat insulation part is located between the first heat insulation part and the third heat insulation part, wherein the first heat insulation part and the third heat insulation part are arranged on different surfaces, and the second heat insulation part is arranged in an arc shape.
[0009] Further, the first heat insulation part has mounting holes, the mounting holes are multiple, the multiple mounting holes are arranged at intervals along the length direction of the first heat insulation part; and / or, the multiple mounting holes are arranged at intervals along the width direction of the first heat insulation part.
[0010] Further, the first heat insulation part has flow guide holes, the flow guide holes are multiple, the multiple flow guide holes are arranged at intervals along the length direction of the first heat insulation part; and / or, the multiple flow guide holes are arranged at intervals along the width direction of the first heat insulation part.
[0011] Further, the heat insulation device further comprises a buffer structure, the buffer structure is arranged on the side of the heat insulation structure close to the to-be-insulated part.
[0012] Further, the buffer structure is multiple, the multiple buffer structures are arranged at intervals along the length direction of the heat insulation structure; and / or, the multiple buffer structures are arranged at intervals along the width direction of the heat insulation structure.
[0013] Further, the heat insulation structure comprises a first heat insulation layer, a second heat insulation layer and a third heat insulation layer which are mutually adhered, the second heat insulation layer is located between the first heat insulation layer and the third heat insulation layer,
[0014] Wherein, the first heat insulation layer and the third heat insulation layer are both metal parts, and the second heat insulation layer is a flexible part.
[0015] Further, the thickness T of the heat insulation structure satisfies: 1.8mm≤T≤2.2mm.
[0016] Further, the hole diameter D1 satisfies: 6mm≤D1≤10mm.
[0017] The technical scheme of the utility model discloses the heat insulation structure of heat insulation device is arranged on the piece to be insulated, the heat insulation structure has the flow guide hole, the flow guide hole includes the first hole section and the second hole section that intercommunicate, the second hole section is located the side of the first hole section away from the heat insulation structure, and the second hole section has the preset distance between the end away from the first hole section and the piece to be insulated. BRIEF DESCRIPTION OF DRAWINGS
[0018] The drawings accompanying the specification of this application form a part hereof, serve to provide further understanding of the application, and together with the description of the application explain the application. Such an embodiment of the application, as illustrated in the drawings, is presented by way of explanation of the application, and does not constitute any limitation of the application. In the drawings:
[0019] Figure 1 Fig. 1 shows the overall structure schematic diagram of the embodiment of the heat insulation device according to the utility model;
[0020] Figure 2 Fig. 2 shows the overall structure top view of the embodiment of the heat insulation device according to the utility model;
[0021] Figure 3 Fig. 3 shows the sectional view at C-C in Fig. 1. Figure 2
[0022] Wherein, the above-mentioned drawings include the following signs:
[0023] 10, heat insulation structure; 11, first heat insulation part; 12, second heat insulation part; 13, third heat insulation part;
[0024] 20, flow guide hole; 21, first hole section; 22, second hole section;
[0025] 30, mounting hole. DETAILED DESCRIPTION
[0026] It should be noted that the embodiments and features in the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.
[0027] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as generally understood by those skilled in the art to which the present application belongs.
[0028] In the present application, unless otherwise specified, the orientation words such as "up, down" used herein are generally directed to the direction shown in the drawings, or are directed to the vertical, perpendicular or gravity direction; similarly, for the convenience of understanding and description, "left, right" is generally directed to the left and right shown in the drawings; "inner, outer" refers to the inner and outer relative to the contour of each component, but the above orientation words are not used to limit the present application.
[0029] In order to solve the problem of short service life of the exhaust manifold in the prior art, the present application provides a heat insulation device.
[0030] As shown in Figures 1 to 3 The heat insulation device includes a heat insulation structure 10. The heat insulation structure 10 is arranged on a heat insulation object, and the heat insulation structure 10 has a flow guide hole 20. The flow guide hole 20 includes a first hole section 21 and a second hole section 22 which are in communication with each other. The second hole section 22 is located on the side of the first hole section 21 away from the heat insulation structure 10, and the end of the second hole section 22 away from the first hole section 21 has a predetermined distance from the heat insulation object. Wherein, the hole diameter D1 of the first hole section 21 and the hole diameter D2 of the second hole section 22 satisfy: D1 = 2D2.
[0031] Applying the technical solution of this embodiment, the heat insulation structure 10 of the heat insulation device is disposed on the component to be insulated. The heat insulation structure 10 has a guide hole 20, which includes a first hole segment 21 and a second hole segment 22 that are interconnected. The second hole segment 22 is located on the side of the first hole segment 21 away from the heat insulation structure 10, and the end of the second hole segment 22 away from the first hole segment 21 is at a predetermined distance from the component to be insulated. The aperture D1 of the first hole segment 21 and the aperture D2 of the second hole segment 22 satisfy the condition: D1 = 2D2. Thus, when the heat insulation device is installed on the exhaust manifold, the heat insulation device is connected to the component to be insulated through the heat insulation structure 10, and the heat insulation structure 10 separates the exhaust manifold from other components, preventing heat transfer from the exhaust manifold to other components. Subsequently, external cooling gas can flow into the exhaust manifold through the guide hole 20 on the heat insulation structure 10, achieving cooling of the exhaust manifold and thus realizing its heat dissipation performance. Meanwhile, the above-mentioned arrangement of the first hole section 21 and the second hole section 22 not only realizes the heat insulation function of the heat insulation structure 10, but also accelerates the flow rate of cooling gas, improves the cooling efficiency of the exhaust manifold, further reduces the temperature of the exhaust manifold, improves the heat dissipation efficiency of the exhaust manifold, thereby reducing the probability of low-cycle fatigue cracks in the exhaust manifold, extending the service life of the exhaust manifold, and thus solving the problem of short service life of the exhaust manifold in the prior art.
[0032] like Figure 1 and Figure 2 As shown, the heat insulation structure 10 is plate-shaped and also has mounting holes 30 for fasteners to pass through the mounting holes 30 to connect the heat insulation structure 10 and the component to be insulated. In this way, workers can connect the isolation structure and the exhaust manifold by passing fasteners through the mounting holes 30, thus realizing the installation of the isolation device and ensuring its reliability. At the same time, the plate-shaped heat insulation structure 10 facilitates installation, improving convenience and efficiency, and ensuring the stability of the installation. Furthermore, it simplifies the formation of the heat insulation structure 10, making it easier to process and realize, reducing processing difficulty and improving processing efficiency.
[0033] In this embodiment, the fastener is a bolt.
[0034] like Figure 1 and Figure 2As shown, the heat insulation structure 10 includes a first heat insulation part 11, a second heat insulation part 12, and a third heat insulation part 13 connected in sequence. The second heat insulation part 12 is located between the first heat insulation part 11 and the third heat insulation part 13. The first heat insulation part 11 and the third heat insulation part 13 are not on the same plane, and the second heat insulation part 12 is arc-shaped. This arrangement allows the heat insulation structure 10 to insulate the exhaust manifold from different directions and spaces, protecting the components around the exhaust manifold and expanding the heat insulation range of the heat insulation device. Simultaneously, the arrangement of the second heat insulation part 12 allows the heat insulation structure 10 to better fit the outer circumference of the exhaust manifold, further ensuring the heat insulation reliability of the heat insulation structure 10 and its installation reliability.
[0035] In this embodiment, the heat insulation structure 10 is generally similar to an inverted V shape, and the plane where the first heat insulation part 11 is located is set at an angle to the plane where the third heat insulation part 13 is located.
[0036] like Figure 1 and Figure 2 As shown, the first heat insulation part 11 has multiple mounting holes 30, which are spaced apart along the length of the first heat insulation part 11; and / or, the multiple mounting holes 30 are spaced apart along the width of the first heat insulation part 11. This arrangement allows workers to install the heat insulation structure 10 using multiple fasteners, improving the connection stability between the heat insulation structure 10 and the exhaust manifold, and also enhancing the installation reliability of the heat insulation device. Simultaneously, this arrangement prevents the heat insulation device from detaching from the exhaust manifold due to external forces, further improving the heat insulation reliability of the device.
[0037] In this embodiment, the mounting holes 30 are spaced apart along the length direction of the first heat insulation part 11 and also spaced apart along the width direction of the first heat insulation part 11.
[0038] In this embodiment, the number of mounting holes 30 is four.
[0039] It should be noted that the number of mounting holes 30 is not limited to this and can be adjusted according to working conditions and usage requirements. Optionally, the number of mounting holes 30 can be six, seven, eight, ten, or more.
[0040] like Figure 1 and Figure 2As shown, the first heat insulation part 11 has flow guide holes 20, the flow guide holes 20 are multiple, and the multiple flow guide holes 20 are arranged along the length direction of the first heat insulation part 11; and / or, the multiple flow guide holes 20 are arranged along the width direction of the first heat insulation part 11. In this way, the above arrangement enables the cooling airflow from the outside to flow to the exhaust manifold through the multiple flow guide holes 20, increases the cooling area of the exhaust manifold, further reduces the temperature of the exhaust manifold, improves the heat dissipation performance of the exhaust manifold, further reduces the risk of low cycle fatigue cracks of the exhaust manifold, and further prolongs the service life of the exhaust manifold.
[0041] In the embodiment, the flow guide holes 20 are arranged along the length direction of the first heat insulation part 11, and also arranged along the width direction of the first heat insulation part 11.
[0042] In the embodiment, the number of the flow guide holes 20 is sixteen.
[0043] It should be noted that the number of the flow guide holes 20 is not limited to this, and can be adjusted according to the working conditions and use requirements. Optionally, the number of the flow guide holes 20 is eight, or nine, or twelve, or twenty, or multiple.
[0044] In the embodiment, the heat insulation device further comprises a buffer structure, and the buffer structure is arranged on the side of the heat insulation structure 10 close to the part to be insulated. In this way, the buffer structure can not only ensure the reliability of the connection between the heat insulation structure 10 and the exhaust manifold, but also buffer the impact force between the heat insulation structure 10 and the exhaust manifold due to external force, so as to avoid the collision between the heat insulation structure 10 and the exhaust manifold due to external force vibration, thereby prolonging the service life of the heat insulation structure 10 and the exhaust manifold, and further ensuring the operation stability of the engine and the heat insulation reliability of the heat insulation device.
[0045] Specifically, the buffer structure is a high-heat-resistant elastic rubber part.
[0046] Specifically, the buffer structure is multiple, and the multiple buffer structures are arranged along the length direction of the heat insulation structure 10; and / or, the multiple buffer structures are arranged along the width direction of the heat insulation structure 10. In this way, the arrangement of the multiple buffer structures can also balance the stress of the heat insulation structure 10, expand the buffer range of the buffer structure, and further buffer the impact force between the heat insulation structure 10 and the exhaust manifold, thereby further prolonging the service life of the heat insulation structure 10 and the exhaust manifold.
[0047] Specifically, the heat insulation structure 10 comprises a first heat insulation layer, a second heat insulation layer and a third heat insulation layer which are attached to each other, and the second heat insulation layer is located between the first heat insulation layer and the third heat insulation layer, wherein the first heat insulation layer and the third heat insulation layer are metal pieces, and the second heat insulation layer is a flexible piece. In this way, the first heat insulation layer and the third heat insulation layer are arranged in a manner that realizes the contact of the heat insulation structure 10 with the external environment, guarantees the strength and rigidity of the heat insulation structure 10, and is also beneficial to the installation and connection of the heat insulation structure 10 with the external environment. At the same time, the second heat insulation layer is arranged in a manner that enables the heat insulation structure 10 to block and reduce the conduction of heat, guarantees the heat insulation reliability of the heat insulation structure 10, improves the impact resistance of the heat insulation structure 10, and prolongs the service life of the heat insulation structure 10.
[0048] In the embodiment, the first heat insulation layer is located on the side of the second heat insulation layer close to the exhaust manifold, and the third heat insulation layer is located on the side of the second heat insulation layer away from the exhaust manifold.
[0049] Specifically, the thickness T of the heat insulation structure 10 satisfies 1.8mm≤T≤2.2mm. In this way, the thickness of the heat insulation structure 10 is arranged in a manner that, on the one hand, guarantees the heat insulation reliability of the heat insulation structure 10, and on the other hand, reduces the weight of the heat insulation structure 10, and realizes the lightweight design of the heat insulation device.
[0050] In the embodiment, the thickness T of the heat insulation structure 10 satisfies T=2mm, so as to guarantee that the thickness T of the heat insulation structure 10 is appropriate.
[0051] Specifically, the hole diameter D1 satisfies 6mm≤D1≤10mm. In this way, the above-mentioned arrangement guarantees the heat insulation function of the heat insulation structure 10, and also enables the inflow of external cooling air flow, guarantees the heat dissipation efficiency of the exhaust manifold, avoids the reduction of the heat insulation function of the heat insulation structure 10 due to the excessively large hole diameter of the flow guide hole 20, and also avoids the failure of the external air flow to flow into the outer surface of the exhaust manifold due to the excessively small hole diameter of the flow guide hole 20, so as to realize the flow guide reliability of the flow guide hole 20, and guarantee the heat dissipation performance of the exhaust manifold.
[0052] From the above description, it can be seen that the above-mentioned embodiments of the utility model realize the following technical effects:
[0053] The heat insulation structure of the heat insulation device is arranged on the to-be-insulated part, and the heat insulation structure has a flow guide hole, the flow guide hole includes a first hole section and a second hole section which are in communication with each other, the second hole section is located on the side of the first hole section away from the heat insulation structure, and a preset distance is provided between the end of the second hole section away from the first hole section and the to-be-insulated part. Wherein, the hole diameter D1 of the first hole section and the hole diameter D2 of the second hole section satisfy: D1=2D2. In this way, when the worker sets the heat insulation device on the exhaust manifold, the heat insulation device is connected with the to-be-insulated part through the heat insulation structure, and the separation between the exhaust manifold and other components is realized through the heat insulation structure to avoid heat transfer of the exhaust manifold to other components. Then, the cooling gas in the external environment can flow into the exhaust manifold through the flow guide hole on the heat insulation structure, realizing the cooling of the exhaust manifold, so as to realize the heat dissipation performance of the exhaust manifold. At the same time, the above-mentioned setting of the first hole section and the second hole section can not only realize the heat insulation function of the heat insulation structure, but also accelerate the flow rate of the cooling gas, improve the cooling efficiency of the exhaust manifold, further reduce the temperature of the exhaust manifold, and improve the heat dissipation efficiency of the exhaust manifold, thereby reducing the probability of low-cycle fatigue cracks of the exhaust manifold, prolonging the service life of the exhaust manifold, and further solving the problem of short service life of the exhaust manifold in the prior art.
[0054] It is to be noted that the terms used herein are only intended to describe specific embodiments and are not intended to limit the example embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that the terms "comprise" and / or "include" as used in the specification indicate the presence of features, steps, operations, devices, components and / or combinations thereof.
[0055] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.
[0056] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. A thermal insulation device, characterized in that The application relates to a heat insulation structure (10) arranged on a heat insulation object, wherein the heat insulation structure (10) is provided with flow guide holes (20), the flow guide holes (20) comprise a first hole section (21) and a second hole section (22) which are in communication with each other, the second hole section (22) is located on the side of the first hole section (21) away from the heat insulation structure (10), and a preset distance is provided between the end of the second hole section (22) away from the first hole section (21) and the heat insulation object. The hole diameter D1 of the first hole section (21) and the hole diameter D2 of the second hole section (22) satisfy the following relationship: D1=2D2. The heat insulation structure (10) is plate-shaped, and the heat insulation structure (10) is further provided with mounting holes (30) for connecting the heat insulation structure (10) and the heat insulation object through fasteners. The heat insulation structure (10) comprises a first heat insulation part (11), a second heat insulation part (12) and a third heat insulation part (13) which are sequentially connected, and the second heat insulation part (12) is located between the first heat insulation part (11) and the third heat insulation part (13).
2. The insulating device of claim 1, wherein The first heat insulation part (11) and the third heat insulation part (13) are arranged in different planes, and the second heat insulation part (12) is arranged in an arc shape.
3. The thermal insulation device of claim 2, wherein The first heat insulation part (11) is provided with the mounting holes (30), the mounting holes (30) are multiple, and the mounting holes (30) are arranged in the length direction of the first heat insulation part (11) at intervals; and / or the mounting holes (30) are arranged in the width direction of the first heat insulation part (11) at intervals. The first heat insulation part (11) is provided with the flow guide holes (20), the flow guide holes (20) are multiple, and the flow guide holes (20) are arranged in the length direction of the first heat insulation part (11) at intervals; and / or the flow guide holes (20) are arranged in the width direction of the first heat insulation part (11) at intervals.
4. The insulating device of claim 3, wherein The heat insulation device further comprises a buffer structure arranged on the side of the heat insulation structure (10) close to the heat insulation object.
5. The insulating device of claim 3, wherein The buffer structure is multiple, and the buffer structures are arranged in the length direction of the heat insulation structure (10) at intervals; and / or the buffer structures are arranged in the width direction of the heat insulation structure (10) at intervals.
6. The insulating device of claim 2, wherein The heat insulation structure (10) comprises a first heat insulation layer, a second heat insulation layer and a third heat insulation layer which are in abutment with each other, and the second heat insulation layer is located between the first heat insulation layer and the third heat insulation layer.
7. The insulating device of claim 6, wherein The first heat insulation layer and the third heat insulation layer are both metal parts, and the second heat insulation layer is a flexible part.
8. The thermal insulation device according to any one of claims 1 to 7, characterized in that The thickness T of the heat insulation structure (10) satisfies the following relationship: 1.8mm<=T<=2.2mm. The hole diameter D1 satisfies the following relationship: 6mm<=D1<=10mm.
9. The thermal insulation device according to any one of claims 1 to 7, characterized in that 10. The thermal insulation device according to any one of claims 1 to 7, characterized in that