Built-in flow guide cover for exhaust diffusion section of gas turbine

Abstract

The utility model discloses a built-in air guide cover of a gas turbine exhaust diffusion section, which comprises an air guide cover body, the air guide cover body adopts a trumpet type conical structure design, a first reinforcing inner plate and a second reinforcing inner plate are fixedly arranged on the inner wall of the air guide cover body, and the first reinforcing inner plate and the second reinforcing inner plate adopt an annular structure design. A first non-return cover is fixedly installed on the inner wall of the first reinforcing inner plate, a second non-return cover is fixedly installed on the inner wall of the second reinforcing inner plate, the windward side of the first non-return cover and the windward side of the second non-return cover are each of an arc-shaped structure design, and the first non-return cover and the second non-return cover are each of a conical structure design. According to the exhaust diffusion section, the situation that a heat preservation layer in the exhaust diffusion section is blown by hot air for a long time and falls off can be effectively avoided, the phenomenon that the outer surface of the section body is overheated due to the fact that the heat preservation layer falls off, and the hot air conduction effect is reduced is avoided; meanwhile, heat loss is reduced.

Description

Technical Field

[0001] This utility model relates to the field of thermoelectric gas turbine technology, specifically to a built-in guide shroud for the exhaust diffuser section of a gas turbine. Background Technology

[0002] When a thermoelectric gas turbine is in use, it needs to be equipped with an exhaust diffusion structure. The exhaust diffusion section is generally equipped with an internal insulation layer. This internal insulation layer can effectively prevent the hot air inside the diffusion section from flowing out and causing overheating on the outer surface of the section, thus having a good internal heat preservation effect.

[0003] Traditional gas turbine exhaust diffuser sections typically have simple insulation cotton structures. During use, these diffusers lack any exhaust flow guidance structures, making the inner wall insulation layer susceptible to prolonged exposure to hot air from strong winds. Over time, the insulation cotton on the inner wall can detach due to these strong winds, allowing internal heat to be conducted to the outside through the detached areas. This can lead to overheating in localized areas of the exhaust diffuser, affecting operational safety and posing a potential safety hazard. Therefore, this invention proposes a built-in flow guide for the gas turbine exhaust diffuser section. Utility Model Content

[0004] The purpose of this invention is to provide a built-in diffuser for the exhaust diffuser section of a gas turbine to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a built-in air guide shroud for the exhaust diffuser section of a gas turbine, comprising an air guide shroud body. The air guide shroud body adopts a trumpet-shaped conical structure design. A first reinforcing inner plate and a second reinforcing inner plate are fixedly installed on the inner wall of the air guide shroud body. The first and second reinforcing inner plates adopt a circular annular structure design. A first check shroud is fixedly installed on the inner wall of the first reinforcing inner plate, and a second check shroud is fixedly installed on the inner wall of the second reinforcing inner plate. The windward surfaces of the first and second check shrouds are both arc-shaped structures. Both the first and second check shrouds adopt a conical structure design. The inlet diameter of the first and second check shrouds is larger than the outlet diameter. A flow equalization plate is fixedly installed inside the tail end of the air guide shroud body, and the flow equalization plate has several evenly distributed flow equalization holes.

[0006] Preferably, the inlet diameter of the air guide cover body is smaller than the outlet diameter, and the interior of the air guide cover body is designed as a hollow structure.

[0007] Preferably, an inner insulation layer is provided on the inner wall of the air guide cover body, and the inner insulation layer is filled with insulation cotton with a density of 128 kg / m³. 3 The above are Morgan blankets.

[0008] Preferably, a front flange is fixedly installed on the outside of the front air inlet of the air guide cover body.

[0009] Preferably, a number of circumferentially distributed front lifting lugs are fixedly installed on the front outer surface of the air guide cover body.

[0010] Preferably, a rear flange is fixedly installed on the outside of the air inlet at the rear end of the air guide cover body.

[0011] Preferably, a number of circumferentially distributed rear lifting lugs are fixedly installed on the outer surface of the tail end of the air guide cover body.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This utility model, through its built-in flow guide hood, can better guide and protect the internal insulation layer of the exhaust diffuser section. It can effectively prevent the insulation layer inside the exhaust diffuser section from being blown away by hot air for a long time, thus avoiding the phenomenon of overheating on the outer surface of the section due to the insulation layer falling off. It also reduces the heat conduction effect, reduces heat loss, improves heat utilization efficiency, and reduces the safety hazards of hot air emission, thus having a high degree of safety in use.

[0014] Meanwhile, the check hood of this utility model can effectively prevent the exhaust airflow from flowing back, thus avoiding reverse flow and improving the uniformity of the airflow of the guide hood. It has a better airflow guiding effect. Furthermore, the flow equalization plate can effectively equalize the exhaust of the gas turbine, making the exhaust more uniform and avoiding concentrated blowing of small-diameter exhausts. This reduces the exhaust wind force and effectively prevents the insulation layer inside the exhaust diffuser section from falling off due to strong winds, thereby improving the performance. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the external three-dimensional structure of the air guide cover body according to an embodiment of the present utility model;

[0016] Figure 2 This is a schematic diagram of the tail air outlet structure of the air guide cover body according to an embodiment of the present utility model;

[0017] Figure 3 This is a schematic diagram of the internal cross-sectional structure of the air guide cover body according to an embodiment of the present utility model;

[0018] Figure 4 This is a schematic diagram of the hot air flow direction structure of the air guide cover body according to an embodiment of the present utility model.

[0019] In the diagram: 1. Air guide hood body; 2. No. 1 reinforcing inner plate; 3. No. 2 reinforcing inner plate; 4. No. 1 check hood; 5. No. 2 check hood; 6. Flow equalization plate; 7. Flow equalization hole; 8. Inner insulation layer; 9. Front flange; 10. Front lifting lug; 11. Rear flange; 12. Rear lifting lug. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be 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; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] Please see Figure 1-4 One embodiment of this utility model provides: a built-in air guide shroud for the exhaust diffuser section of a gas turbine, including a shroud body 1. The air guide shroud body 1 adopts a trumpet-shaped conical structure design, as detailed in the appendix of the specification. Figure 1 As shown, the inlet diameter of the air guide shroud body 1 is smaller than the outlet diameter, and the interior of the air guide shroud body 1 is a hollow structure design.

[0024] The inner wall of the air guide cover body 1 is fixedly installed with a first reinforcing inner plate 2 and a second reinforcing inner plate 3. The first reinforcing inner plate 2 and the second reinforcing inner plate 3 adopt a circular structure design. The first reinforcing inner plate 2 and the second reinforcing inner plate 3 can strengthen the internal support of the air guide cover, improve the internal support strength of this utility model, and have a better impact resistance effect.

[0025] A first check shield 4 is fixedly installed on the inner wall of the first reinforcing inner plate 2, and a second check shield 5 is fixedly installed on the inner wall of the second reinforcing inner plate 3. The windward surfaces of both the first check shield 4 and the second check shield 5 are designed with an arc shape. By setting the windward surface of the check shield to be an arc shape, the arc shape structure can have a certain airflow guiding effect, allowing the airflow to enter the check shield more smoothly for guiding and preventing backflow. Compared with a vertical plane structure, the arc shape can have a smoother guiding effect, effectively reducing airflow resistance, making the airflow guiding work smoother and more practical.

[0026] Furthermore, both the first check shield 4 and the second check shield 5 adopt a conical structure design, and the inlet diameter of the first check shield 4 and the second check shield 5 is larger than the outlet diameter.

[0027] For details on this structural design, please refer to the attached instruction manual. Figure 4 As shown in the airflow direction diagram, the set check hood can effectively prevent the exhaust airflow from flowing back, thus avoiding reverse flow and effectively improving the uniform directional guidance of the air guide hood, resulting in a better guiding effect.

[0028] A flow equalization plate 6 is fixedly installed inside the tail end of the air guide shroud body 1. The flow equalization plate 6 has several evenly distributed flow equalization holes 7. By setting the flow equalization plate 6 at the tail end of the air guide shroud, the exhaust hot air after being guided can flow through the flow equalization holes 7 of the flow equalization plate 6 for discharge. In this way, the flow equalization plate 6 can effectively achieve the flow equalization of the exhaust hot air, making the exhaust hot air more uniform, effectively avoiding the concentrated blowing of small-diameter exhaust, reducing the exhaust wind force, and thus effectively preventing the insulation layer inside the exhaust diffuser section from being blown off by strong winds.

[0029] In this embodiment, in order to improve the heat insulation effect inside the air guide hood of this utility model and prevent the loss of gas heat from the gas turbine, an inner heat insulation layer 8 is provided on the inner wall of the air guide hood body 1. The inner heat insulation layer 8 is filled with heat insulation cotton with a density of 128 kg / m³. 3 The Morgan blanket described above, through its internal insulation layer 8, can effectively insulate the heat emitted from the interior, reduce heat loss, and improve the quality of subsequent heat energy utilization.

[0030] In this embodiment, in order to facilitate the installation of the air guide shroud of this utility model inside the gas turbine exhaust diffusion section, a front flange 9 is fixedly installed on the outside of the front air inlet of the air guide shroud body 1, and a rear flange 11 is fixedly installed on the outside of the rear air inlet of the air guide shroud body 1.

[0031] The front flange 9 can be bolted to the air inlet of the exhaust diffuser section, thus facilitating the fixed installation of the front end of the air guide hood. The rear flange 11 can be bolted to the air outlet of the exhaust diffuser section, thus facilitating the fixed installation of the rear end of the air guide hood. The use of the front and rear flanges, together with the fixing bolts, allows the present invention to be installed inside the exhaust diffuser section, ensuring its normal operation.

[0032] Furthermore, to facilitate the hoisting and installation of the air guide cover, a number of circumferentially distributed front lifting lugs 10 are fixedly installed on the outer surface of the front end of the air guide cover body 1, while a number of circumferentially distributed rear lifting lugs 12 are fixedly installed on the outer surface of the rear end of the air guide cover body 1. Thus, the hoisting and installation of the air guide cover of this utility model can be completed by using the front lifting lugs 10 and the rear lifting lugs 12 together, which improves the convenience and efficiency of installation and has a better effect.

[0033] Working principle: The front flange 9 of this utility model can be bolted to the air inlet of the exhaust diffuser section, thus facilitating the fixed installation of the front end of the air guide hood. The rear flange 11 can be bolted to the air outlet of the exhaust diffuser section, thus facilitating the fixed installation of the rear end of the air guide hood. By using the front and rear flanges in conjunction with the fixing bolts, this utility model can be installed inside the exhaust diffuser section to ensure its normal use effect.

[0034] The front lifting lug 10 and the rear lifting lug 12 can be used together to complete the hoisting and installation of the air guide cover of this utility model, improving the convenience and efficiency of installation and achieving good results.

[0035] In practical use, the hot gas emitted by the gas turbine can enter the interior of the air guide shroud of this utility model through the air inlet of the diffuser section. The air guide shroud of this utility model can perform comprehensive air guiding work, and the check shroud can effectively prevent the exhaust airflow from flowing back, thus avoiding reverse flow of airflow and effectively improving the uniform directional air guiding performance of the air guide shroud, resulting in a better air guiding effect.

[0036] Meanwhile, the windward side of the check shield is curved, and this curved surface structure design can have a certain airflow guiding effect, allowing the airflow to enter the check shield more smoothly for guiding and preventing backflow. Compared with the vertical plane structure, the curved surface can have a smoother guiding effect, effectively reducing airflow resistance, making the airflow guiding work smoother and more practical.

[0037] After being guided, the exhaust hot gas can flow through the flow equalization holes 7 of the flow equalization plate 6 for discharge. In this way, the flow equalization plate 6 can effectively equalize the exhaust hot gas, making the exhaust hot gas more uniform and effectively avoiding the concentrated blowing of small-diameter exhausts, reducing the exhaust wind force, and thus effectively preventing the insulation layer inside the exhaust diffuser section from being blown off by strong winds.

[0038] In summary, this utility model, through its built-in flow guide shroud, can better guide and protect the internal insulation layer of the exhaust diffuser section. This effectively prevents the insulation layer inside the exhaust diffuser section from being blown away by hot air for a long time, thus avoiding the situation where the insulation layer falls off and causes overheating on the outer surface of the section. It also reduces the heat conduction effect, reduces heat loss, improves heat utilization efficiency, and reduces the safety hazards of hot air emissions, thus having a high degree of safety in use.

[0039] Meanwhile, the check hood of this utility model can effectively prevent the exhaust airflow from flowing back, thus avoiding reverse flow and improving the uniformity of the airflow of the guide hood. It has a better airflow guiding effect. Furthermore, the flow equalization plate can effectively equalize the exhaust of the gas turbine, making the exhaust more uniform and avoiding concentrated blowing of small-diameter exhausts. This reduces the exhaust wind force and effectively prevents the insulation layer inside the exhaust diffuser section from falling off due to strong winds, thereby improving the performance.

[0040] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A gas turbine exhaust diffuser section with an internal air guide shroud, comprising a shroud body (1), characterized in that, The air guide cover body (1) adopts a horn-shaped conical structure design. A first reinforcing inner plate (2) and a second reinforcing inner plate (3) are fixedly installed on the inner wall of the air guide cover body (1). The first reinforcing inner plate (2) and the second reinforcing inner plate (3) adopt a circular structure design. A first check shield (4) is fixedly installed on the inner wall of the first reinforcing inner plate (2), and a second check shield (5) is fixedly installed on the inner wall of the second reinforcing inner plate (3). The windward surfaces of the first check shield (4) and the second check shield (5) are both designed with an arc shape. The first check shield (4) and the second check shield (5) are both designed with a conical shape. The inlet diameter of the first check shield (4) and the second check shield (5) is larger than the outlet diameter. A flow equalization plate (6) is fixedly installed inside the tail end of the air guide body (1). The flow equalization plate (6) has several evenly distributed flow equalization holes (7).

2. The built-in diffuser of the gas turbine exhaust diffuser section according to claim 1, characterized in that: The inlet diameter of the air guide hood body (1) is smaller than the outlet diameter, and the interior of the air guide hood body (1) is a hollow structure design.

3. The built-in diffuser of the gas turbine exhaust diffuser section according to claim 1, characterized in that: An inner insulation layer (8) is provided on the inner wall of the air guide hood body (1), and the inner insulation layer (8) is filled with insulation cotton with a density of 128 kg / m³. 3 The above are Morgan blankets.

4. The built-in diffuser of the gas turbine exhaust diffuser section according to claim 1, characterized in that: A front flange (9) is fixedly installed on the outside of the front air inlet of the air guide shroud body (1).

5. The built-in diffuser of the gas turbine exhaust diffuser section according to claim 1, characterized in that: The front outer surface of the air guide cover body (1) is fixedly equipped with several circumferentially distributed front lifting lugs (10).

6. The built-in diffuser of the gas turbine exhaust diffuser section according to claim 1, characterized in that: A rear flange (11) is fixedly installed on the outside of the air inlet at the tail end of the air guide shroud body (1).

7. The built-in diffuser of the gas turbine exhaust diffuser section according to claim 1, characterized in that: Several circumferentially distributed rear lifting lugs (12) are fixedly installed on the outer surface of the tail end of the air guide cover body (1).

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