Heat preservation structure for exhaust diffusion section of gas turbine

Abstract

The utility model discloses a gas turbine exhaust diffusion section heat preservation structure which comprises an exhaust diffusion pipe, an inner flow guide plate is installed in the exhaust diffusion pipe and is of a conical structure design, the inner flow guide plate is covered with a heat preservation structure, the heat preservation structure comprises an outer protection plate and an inner protection plate, and a hollow structure design is arranged between the outer protection plate and the inner protection plate. Compared with an existing single-layer heat preservation structure, the heat preservation structure of the diffusion end has the advantages that the internal heat preservation effect of the diffusion end can be effectively improved through the multiple structures and modes, the heat preservation effect of the diffusion end is improved, the heat preservation effect of the diffusion end is improved, and the heat preservation effect of the diffusion end is improved. And meanwhile, the overtemperature phenomenon of the outer surface of the diffusion section caused by internal heat energy loss can be effectively avoided, internal heat preservation protection treatment is better conducted on an external structure and personnel, potential safety hazards are reduced, and the heat preservation structure layer is of a stable working structure and is not prone to falling off.

Description

Technical Field

[0001] The utility model relates to the technical field of combustion engine exhaust, in particular to a combustion engine exhaust diffusion section heat preservation structure. Background Art

[0002] Thermal power turbines need to be equipped with exhaust diffusion structures when in use. The exhaust diffusion section generally has an internal insulation layer to effectively prevent the hot air in the internal diffusion section from flowing out and causing overheating on the surface of the section.

[0003] Traditional gas turbine exhaust diffuser insulation structures are mostly simple insulation cotton, which is prone to insufficient insulation in actual use, causing heat loss and overheating of the diffuser.

[0004] Heat loss causes the surface temperature of the diffusion section to be too high, which can easily cause damage to the surrounding equipment, pipelines, and cables of the diffusion section, and can also easily cause burns to on-site personnel such as inspection and maintenance personnel. It is a huge hidden danger that affects the operation of the unit and the safety of personnel and equipment. On the other hand, the high surface temperature of the diffusion section brings about a large heat dissipation loss, which reduces the efficiency of heat energy utilization. Utility Model Content

[0005] The purpose of the utility model is to provide a thermal insulation structure for a combustion engine exhaust diffusion section to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a thermal insulation structure of the exhaust diffusion section of a combustion engine, comprising an exhaust diffusion pipe, an inner guide plate installed inside the exhaust diffusion pipe, the inner guide plate adopts a conical structure design, the outer covering cover of the inner guide plate is provided with a thermal insulation structure, the thermal insulation structure comprises an outer protective plate and an inner protective plate, the outer protective plate and the inner protective plate are designed as a hollow structure, the hollow layer between the outer protective plate and the inner protective plate is provided with a number of equally spaced linearly distributed thermal insulation cotton structure layers, and a wedge-shaped thermal insulation pillow is provided between two adjacent thermal insulation cotton structure layers.

[0007] Preferably, ceramic fiber cloth is fixedly installed below the wedge-shaped thermal insulation pillow and inside the outer protective plate.

[0008] Preferably, a stainless steel dense mesh is coated below the ceramic fiber cloth and inside the outer protective plate.

[0009] Preferably, an inner pad is fixedly mounted on the outer wall of the inner guard plate.

[0010] Preferably, the thickness of the inner guide plate is 2 mm, the structural height does not exceed 10 mm, and the windward surface is designed as a sloped structure.

[0011] Preferably, the mesh number of the stainless steel fine mesh is 800 meshes.

[0012] Preferably, the thermal insulation cotton structural layer is formed by stacking five layers of thermal insulation cotton, the thickness of the first four layers of the five layers of thermal insulation cotton is 50 mm, and the thickness of the other layer is 25 mm. The overall thickness of the thermal insulation cotton structural layer is compressed to 200 mm.

[0013] Preferably, the thermal insulation cotton of the thermal insulation cotton structural layer has a density of 128 kg / m 3 Morgan blanket above.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The utility model can effectively prevent high-speed smoke from entering the insulation layer structure from below the gasket by providing an inner guide plate, thereby having a certain diversion and guidance effect, avoiding the high-speed smoke from causing high-temperature blowing influence on the insulation layer structure, improving the use stability of the insulation layer structure, effectively preventing the insulation layer structure from being blown off by high-speed smoke, and improving the use performance;

[0016] At the same time, the utility model provides a thermal insulation cotton structure layer and a wedge-shaped thermal insulation pillow inside the thermal insulation structure, and the thermal insulation cotton structure layer is composed of five layers of thermal insulation cotton stacked together. This design can effectively improve the thermal insulation performance inside the gas exhaust diffusion section, and has multiple thermal insulation characteristics of multiple layers and multiple structures, thereby effectively preventing the loss of internal high-temperature flue gas, improving the utilization efficiency of thermal energy, and effectively preventing the overheating phenomenon on the outer surface of the diffusion section caused by the loss of thermal energy, thereby increasing the safety of use, avoiding damage or burns caused by overheating, and reducing safety hazards;

[0017] Finally, the ceramic fiber cloth can effectively isolate heat and reduce heat transfer in high-temperature environments. It is suitable for insulation of high-temperature flue gas ducts. It has good thermal insulation effect and can effectively provide external thermal insulation protection. The stainless steel mesh can improve the external structural strength of the outer guard plate and extend the service life of the structure.

[0018] To sum up, compared with the existing single-layer insulation structure, the utility model can effectively improve the internal insulation effect of the diffusion end through the above-mentioned multiple structures and methods, avoid heat loss, and effectively avoid the internal heat loss that causes overheating on the outer surface of the diffusion section, better perform internal insulation protection treatment on the external structure and personnel, reduce safety hazards, and the insulation structure layer has a relatively stable working structure, is not easy to fall off, is safer to use, and is suitable for promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the outline structure of the exhaust diffusion section of a combustion engine according to an embodiment of the present utility model;

[0020] Figure 2This is a schematic diagram of the thermal insulation structure in the exhaust diffusion section of a combustion engine according to an embodiment of the present utility model.

[0021] In the figure: 1. Exhaust diffuser; 2. Inner guide plate; 3. Insulation structure; 301. Outer guard plate; 302. Inner guard plate; 303. Insulation cotton structure layer; 304. Wedge-shaped insulation pillow; 305. Ceramic fiber cloth; 306. Stainless steel fine mesh; 307. Inner pad. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] 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," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0025] See also Figure 1-2 The utility model provides an embodiment: a combustion engine exhaust diffusion section insulation structure 3, comprising an exhaust diffusion pipe 1, an inner guide plate 2 is installed inside the exhaust diffusion pipe 1, and the inner guide plate 2 adopts a conical structure design, wherein the thickness of the inner guide plate 2 is 2 mm, the structure height does not exceed 10 mm, and the windward surface is a slanted structure design;

[0026] This structural design, through the provision of the inner guide plate 2, can effectively prevent high-speed smoke from entering the insulation layer structure from below the gasket, thereby having a certain diversion and guidance effect, avoiding the high-speed smoke from causing wind blowing on the insulation layer structure, improving the use stability of the insulation layer structure, effectively preventing the insulation layer structure from being blown off by high-speed smoke, and improving the use performance;

[0027] The outer covering cover of the inner guide plate 2 is provided with an insulation structure 3, which includes an outer guard plate 301 and an inner guard plate 302. The outer guard plate 301 and the inner guard plate 302 are designed as a hollow structure. The hollow layer between the outer guard plate 301 and the inner guard plate 302 is provided with a plurality of equally spaced linearly distributed insulation cotton structure layers 303. The insulation cotton structure layer 303 is composed of five layers of insulation cotton stacked together. The thickness of the first four layers of the five layers of insulation cotton is 50 mm, and the thickness of the other layer is 25 mm. The overall thickness of the insulation cotton structure layer 303 is compressed to 200 mm.

[0028] Furthermore, in order to improve the thermal insulation effect of the thermal insulation cotton structure layer 303, the thermal insulation cotton of the thermal insulation cotton structure layer 303 has a density of 128 kg / m 3 The Morgan blanket above;

[0029] A wedge-shaped insulation pillow 304 is provided between two adjacent insulation cotton structural layers 303;

[0030] According to the above structure, the utility model is provided with an insulation cotton structure layer 303 and a wedge-shaped insulation pillow 304 inside the insulation structure 3, and the insulation cotton structure layer 303 is composed of five layers of insulation cotton stacked together. This design can effectively improve the insulation performance inside the gas exhaust diffusion section, and has multiple insulation characteristics of multiple layers and multiple structures, thereby effectively avoiding the loss of internal high-temperature flue gas and improving the efficiency of heat energy utilization. At the same time, it can effectively avoid the overheating phenomenon on the outer surface of the diffusion section caused by heat energy loss, increase the safety of use, avoid overheating damage or burns, and reduce safety hazards.

[0031] In this embodiment, a ceramic fiber cloth 305 is fixedly installed below the wedge-shaped insulation pillow 304 and inside the outer protective plate 301, and a stainless steel mesh 306 is covered below the ceramic fiber cloth 305 and inside the outer protective plate 301;

[0032] Furthermore, the mesh number of the stainless steel mesh 306 is 800 meshes, and the ceramic fiber cloth 305 provided can effectively isolate heat in a high temperature environment and reduce heat transfer, and is suitable for use in high temperature flue gas ducts for heat insulation, has good heat insulation effect, and can effectively provide heat insulation protection to the outside;

[0033] The stainless steel fine mesh 306 can enhance the external structural strength of the outer guard plate 301 and increase the service life of the structure.

[0034] In this embodiment, an inner pad 307 is fixedly installed on the outer wall of the inner guard plate 302. The inner pad 307 can be installed with a screw when in use. By using the screw and the inner pad 307 in conjunction with each other, the overall stability of the inner guard plate 302 structure can be improved, and a better screw fixing effect can be achieved.

[0035] Working principle: When the utility model is in use, the insulation structure of the exhaust diffusion section of the combustion engine is provided with an inner guide plate 2 inside the diffusion section. The inner guide plate 2 can effectively prevent high-speed smoke from entering the insulation layer structure from below the gasket, thereby having a certain diversion and guidance effect, avoiding the high-temperature blowing effect of high-speed smoke on the insulation layer structure, improving the use stability of the insulation layer structure, effectively preventing the insulation layer structure from being blown off by high-speed smoke, and improving the use performance;

[0036] At the same time, the present invention provides a thermal insulation cotton structure layer 303 and a wedge-shaped thermal insulation pillow 304 inside the thermal insulation structure 3, and the thermal insulation cotton structure layer 303 is composed of five layers of thermal insulation cotton stacked together. This design can effectively improve the thermal insulation performance inside the gas exhaust diffusion section, and has multiple thermal insulation characteristics of multiple layers and multiple structures, thereby effectively preventing the loss of internal high-temperature flue gas and improving the efficiency of thermal energy utilization. At the same time, it can effectively prevent the overheating phenomenon on the outer surface of the diffusion section caused by thermal energy loss, thereby increasing the safety of use, avoiding overheating damage or burns, and reducing safety hazards.

[0037] Finally, the ceramic fiber cloth 305 can effectively isolate heat and reduce heat transfer in high-temperature environments. It is suitable for use in high-temperature flue gas ducts for thermal insulation. It has good thermal insulation effect and can effectively provide thermal insulation protection for the outside. The stainless steel mesh 306 can improve the external structural strength of the outer protective plate 301 and extend the service life of the structure.

[0038] To sum up, the utility model can effectively improve the internal insulation effect of the diffusion end through the above-mentioned multiple structures and methods, avoid heat loss, and at the same time effectively avoid the internal heat loss that causes overheating on the outer surface of the diffusion section, better perform internal insulation protection treatment on external structures and personnel, reduce safety hazards, and the insulation structure layer has a relatively stable working structure, is not easy to fall off, is safer to use, and is suitable for promotion and use.

[0039] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A heat-insulating structure for a combustion engine exhaust diffuser section, comprising an exhaust diffuser pipe (1), characterized in that: An inner guide plate (2) is installed inside the exhaust diffuser (1), the inner guide plate (2) adopts a conical structure design, the outer covering cover of the inner guide plate (2) is provided with a heat-insulating structure (3), the heat-insulating structure (3) comprises an outer protective plate (301) and an inner protective plate (302), a hollow structure design is provided between the outer protective plate (301) and the inner protective plate (302), a plurality of heat-insulating cotton structure layers (303) with equal intervals and linear distribution are provided in the hollow layer between the outer protective plate (301) and the inner protective plate (302), and a wedge-shaped heat-insulating pillow (304) is provided between two adjacent heat-insulating cotton structure layers (303).

2. The thermal insulation structure of the exhaust diffuser section of a combustion engine according to claim 1, characterized in that: A ceramic fiber cloth (305) is fixedly installed below the wedge-shaped thermal insulation pillow (304) and inside the outer protective plate (301).

3. The thermal insulation structure of the exhaust diffuser section of a combustion engine according to claim 2, characterized in that: A stainless steel dense mesh (306) is coated below the ceramic fiber cloth (305) and inside the outer protective plate (301).

4. The thermal insulation structure of the exhaust diffuser section of a combustion engine according to claim 1, characterized in that: An inner pad (307) is fixedly mounted on the outer wall of the inner guard plate (302).

5. The thermal insulation structure of the exhaust diffuser section of a combustion engine according to claim 1, characterized in that: The thickness of the inner guide plate (2) is 2 mm, the structural height does not exceed 10 mm, and the windward surface is designed as an inclined surface structure.

6. The thermal insulation structure of the exhaust diffuser section of a combustion engine according to claim 3, characterized in that: The mesh number of the stainless steel fine mesh net (306) is 800 meshes.

7. The thermal insulation structure of the exhaust diffuser section of a combustion engine according to claim 1, characterized in that: The thermal insulation cotton structure layer (303) is formed by stacking five layers of thermal insulation cotton, the thickness of the first four layers of the five layers of thermal insulation cotton is 50 mm, and the thickness of the other layer is 25 mm. The overall thickness of the thermal insulation cotton structure layer (303) is compressed to 200 mm.

8. The thermal insulation structure of the exhaust diffuser section of a combustion engine according to claim 1, characterized in that: The thermal insulation cotton of the thermal insulation cotton structural layer (303) has a density of 128 kg / m 3 The Morgan blanket above.

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