Exhaust elbow heat insulation device

Abstract

The utility model provides an exhaust elbow heat insulation device which comprises a heat insulation pipe and two outer tightening devices, the two outer tightening devices are installed and tightened on the two sides of the heat insulation pipe, the heat insulation pipe comprises a heat insulation main body, the heat insulation main body is of an annular structure, and dovetail grooves distributed in the axis direction of the heat insulation main body are formed in the heat insulation main body. The convex structure is matched with the dovetail groove; a rubber sealing strip attached to the seam line is arranged on the outer side of the heat insulation body, one side of the rubber sealing strip is fixedly connected with the heat insulation body, and the other side of the rubber sealing strip abuts against the outer side face of the heat insulation body. The exhaust elbow heat insulation device is sealed in a dovetail groove mode, the two sides of the heat insulation body are not prone to opening a seam line due to vibration deformation, leakage points are prevented from being generated, and the heat insulation performance of the device is prevented from being reduced; meanwhile, due to the fact that the dovetail groove comprises the five folding faces, the device is good in sealing performance, firm in connection and not prone to falling off due to the structure.

Description

Technical Field

[0001] The utility model relates to the technical field of heat insulation, in particular to an exhaust elbow heat insulation device. Background Art

[0002] The exhaust elbow of a diesel engine is used to discharge high-temperature exhaust gas after combustion. The temperature of the exhaust elbow is very high during the exhaust process, which can easily cause damage to the surrounding parts of the exhaust system. Therefore, a heat shield needs to be installed at the corresponding position.

[0003] Prior art patent number CN213540545U discloses an exhaust elbow heat insulation device for emergency diesel engine generator sets, including an insulation pipe and a tightening connection device; wherein the tightening connection device is located at the head of the insulation pipe, and the insulation pipe and the tightening connection device are detachably connected; the insulation pipe body is detachable, one side of which is provided with a groove, and the other side is provided with a protrusion, and the groove and the protrusion are engaged. The device is suitable for different working environments, can well insulate the exhaust elbow of the generator set, and is particularly suitable for emergency installation.

[0004] The above-mentioned thermal insulation device is fixedly connected by the engagement of the groove and the protrusion, but the contact surface of the groove and the protrusion is a single vertical plane. The mechanical vibration generated when the diesel engine is working may cause local deformation of the groove and the protrusion, so that the deformation point becomes a leakage point of the thermal insulation device, thereby reducing the sealing and thermal insulation performance of the thermal insulation device. In addition, long-term operation may cause the insulation tube body to fall off. Utility Model Content

[0005] In view of the above problems, the utility model provides an exhaust elbow heat insulation device.

[0006] An exhaust elbow insulation device includes an insulation pipe and two external tightening devices, the two external tightening devices are installed and tightened on both sides of the insulation pipe, the insulation pipe includes an insulation body, the insulation body is arranged in an annular structure, and has a dovetail groove distributed along the axial direction of the insulation body, and a convex structure matched with the dovetail groove; the outer surface of the dovetail groove and the convex structure bite to form a seam line, and a rubber sealing strip applied to the seam line is arranged on the outer side of the insulation body, one side of the rubber sealing strip is fixedly connected to the insulation body, and the other side is in contact with the outer side of the insulation body.

[0007] In a preferred embodiment, the size of the protruding structure is greater than or equal to the size of the dovetail groove.

[0008] In a preferred embodiment, the thermal insulation tube is made of aerogel felt.

[0009] In a preferred embodiment, the heat-insulating body includes a cooling water layer and a heat-insulating layer arranged outside the cooling water layer.

[0010] In a preferred embodiment, the thermal insulation tube further includes corrugated protrusions arranged on both sides of the thermal insulation tube.

[0011] In a preferred embodiment, the rubber sealing strip is in a wavy or folded structure and is embedded in the heat insulation body.

[0012] In a preferred embodiment, the exhaust elbow insulation device further comprises two inner tightening devices, and the two inner tightening devices and the two outer tightening devices are evenly distributed on the insulation pipe.

[0013] In a preferred embodiment, the two inner tightening devices and the two outer tightening devices are clamped on the outer side of the insulation pipe.

[0014] The exhaust elbow insulation device of the present application adopts a dovetail groove to perform structural sealing. The two sides of the insulation body are not easily deformed due to vibration to open the seams, thereby avoiding the creation of leakage points and reducing the insulation performance of the device. At the same time, since the dovetail groove position includes five folding surfaces, such a structure has better sealing performance of the device, and the connection is firm and not easy to fall off. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Other characteristics, features and advantages of the present invention will become clear by reading the following description of the exemplary embodiments with reference to the accompanying drawings. The accompanying drawings, which are incorporated into the specification and constitute a part of the specification, illustrate embodiments of the present invention and are used together with the description to explain the principles of the present invention. In these drawings, similar reference numerals are used to represent similar elements. The drawings described below are some embodiments of the present invention, not all embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 Structural diagram of the utility model exhaust elbow heat insulation device;

[0017] Figure 2 The structure diagram of the utility model exhaust elbow heat insulation device without the tightening device installed;

[0018] Figure 3 A cross-sectional view of the exhaust elbow heat insulation device of the utility model;

[0019] Figure 4 A cross-sectional view of the AA position of the exhaust elbow heat insulation device of the utility model;

[0020] Figure 5 A cross-sectional view of the exhaust elbow heat insulation device of the utility model at position BB;

[0021] Figure 6 A magnified view of the position C of the exhaust elbow heat insulation device of the utility model;

[0022] Figure 7Structural diagram of Example 4 of the exhaust elbow heat insulation device of the utility model.

[0023] In the figure: 10, insulation pipe; 20, external tightening device; 11, insulation body; 12, dovetail groove; 13, raised structure; 14, seam line; 15, rubber sealing strip; 30, cooling water layer; 31, insulation layer; 16, wrinkled raised; 21, internal tightening device; 100, exhaust elbow. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other arbitrarily without conflict.

[0025] The exhaust elbow heat insulation device is described in detail below in conjunction with the accompanying drawings and embodiments. Example

[0026] An exhaust elbow insulation device includes an insulation pipe 10 and two external tightening devices 20, wherein the two external tightening devices 20 are installed and tightened on both sides of the insulation pipe 10, and the insulation pipe 10 includes an insulation body 11, and the insulation body 11 is arranged in an annular structure. The insulation body 11 has a dovetail groove 12 distributed along the axial direction of the insulation body 11, and a protruding structure 13 matched with the dovetail groove 12; the outer surface of the dovetail groove 12 and the protruding structure 13 are engaged to form a seam line 14, and a rubber sealing strip 15 is provided on the outer side of the insulation body 11 and is attached to the seam line 14, and one side of the rubber sealing strip 15 is fixedly connected to the insulation body 11, and the other side is in contact with the outer side surface of the insulation body 11.

[0027] Specifically, during installation, the insulation body 11 is opened along the seam line 14, and the insulation body 11 is placed on the outside of the exhaust elbow 100. The insulation body 11 is then engaged and fixed through the dovetail groove 12 and the raised structure 13 to form a sealed seam line 14, and the rubber sealing strip 15 is applied to the seam line 14 to form a seal on the seam line 14 of the insulation body 11.

[0028] Among them, when the diesel engine generates vibration during operation, since the device adopts the dovetail groove 12 for structural sealing, the two sides of the insulation body 11 are not easily deformed due to vibration to open the seam line 14, thereby avoiding the generation of leakage points and reducing the insulation performance of the device.

[0029] Among them, since the dovetail groove 12 position includes 5 folding surfaces, such a structure has better sealing performance of the device, and the device is firmly connected and not easy to fall off.

[0030] The protruding structure 13 is made of an elastic material, such as rubber, and enters the dovetail groove 12 by squeezing and pressing.

[0031] The main body of the heat insulation tube 10 is made of aerogel felt. Example

[0032] Embodiment 2 is an improvement on Embodiment 1. Specifically, the size of the protruding structure 13 is greater than or equal to the size of the dovetail groove 12 . Example

[0033] Embodiment 3 is an improvement on Embodiment 1. Specifically, the heat-insulating body 11 includes a cooling water layer 30 and a heat-insulating layer 31 disposed outside the cooling water layer 30 .

[0034] The exhaust elbow insulation device is cooled by adding a cooling water layer 30 .

[0035] The cooling water layer 30 is provided with a water inlet and a water outlet.

[0036] The cooling water layer 30 can be mainly made of polyvinyl chloride and chloroprene rubber. Example

[0037] Embodiment 4 is an improvement on Embodiment 1. Specifically, the thermal insulation tube 10 further includes corrugated protrusions 16 disposed on both sides of the thermal insulation tube 10 .

[0038] Among them, when the insulation device is applied to an exhaust elbow 100 of a larger size, the wrinkled protrusion 16 will be straightened, thereby increasing the application range of the insulation pipe 10 and being able to match the exhaust elbow 100 with a larger diameter. Example

[0039] Embodiment 5 is an improvement on Embodiment 1. Specifically, the rubber sealing strip 15 has a wavy or folded structure and is embedded in the heat insulation body 11 .

[0040] The rubber sealing strip 15 adopts a wave or folded structure and is embedded in the heat insulation body 11, which can increase the sealing performance and connection strength of the heat insulation device and prevent the device from leaking and falling off. Example

[0041] Example 6 is an improvement on Example 1. Specifically, the exhaust elbow insulation device also includes two inner tightening devices 21. The two inner tightening devices 21 and the two outer tightening devices 20 are evenly distributed on the insulation pipe 10. The two inner tightening devices 21 and the two outer tightening devices 20 are clamped on the outer side of the insulation pipe 10.

[0042] Among them, the two inner tightening devices 21 and the two outer tightening devices 20 are clamped on the outer side of the insulation pipe 10, which can increase the connection strength of the device and avoid air leakage.

[0043] If a cooling water layer 30 is provided, water flow is circulated at the inner tightening device 21 .

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that an article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such article or device. In the absence of further restrictions, the elements defined by the sentence "includes..." do not exclude the existence of other identical elements in the article or device including the elements.

[0045] The above embodiments are only used to illustrate the technical solution of the utility model but not to limit it. The utility model is described in detail with reference to the preferred embodiments. It should be understood by those skilled in the art that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, and all should be included in the scope of the claims of the utility model.

Claims

1. An exhaust elbow insulation device, comprising an insulation pipe (10) and two external tightening devices (20), wherein the two external tightening devices (20) are installed and tightened on both sides of the insulation pipe (10), characterized in that: The heat-insulating pipe (10) comprises a heat-insulating body (11), the heat-insulating body (11) being arranged in an annular structure, the heat-insulating body (11) having a dovetail groove (12) distributed along the axial direction of the heat-insulating body (11), and a protruding structure (13) arranged to match the dovetail groove (12); A seam line (14) is formed on the outer surface of the engagement point between the dovetail groove (12) and the raised structure (13); a rubber sealing strip (15) is provided on the outer side of the heat insulation body (11) and is affixed to the seam line (14); one side of the rubber sealing strip (15) is fixedly connected to the heat insulation body (11), and the other side abuts against the outer side surface of the heat insulation body (11).

2. The exhaust elbow heat insulation device according to claim 1, characterized in that: The size of the protruding structure (13) is greater than or equal to the size of the dovetail groove (12).

3. The exhaust elbow heat insulation device according to claim 1, characterized in that: The thermal insulation tube (10) is made of aerogel felt.

4. The exhaust elbow heat insulation device according to claim 1, characterized in that: The heat-insulating body (11) comprises a cooling water layer (30) and a heat-insulating layer (31) arranged outside the cooling water layer (30).

5. The exhaust elbow heat insulation device according to claim 1, characterized in that: The thermal insulation tube (10) further comprises wrinkled protrusions (16) arranged on both sides of the thermal insulation tube (10).

6. The exhaust elbow heat insulation device according to claim 1, characterized in that: The rubber sealing strip (15) has a wavy or folded structure and is embedded in the heat insulation body (11).

7. The exhaust elbow heat insulation device according to claim 1, characterized in that: The exhaust elbow heat insulation device further comprises two inner tightening devices (21), wherein the two inner tightening devices (21) and the two outer tightening devices (20) are evenly distributed on the heat insulation pipe (10).

8. The exhaust elbow heat insulation device according to claim 7, characterized in that: The two inner tightening devices (21) and the two outer tightening devices (20) are clamped on the outer side surface of the thermal insulation pipe (10).

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