High-temperature exhaust nonmetal expansion joint
By incorporating structures such as extension cylinders, cotton blocks, and baffles into the high-temperature exhaust non-metallic expansion joint, the problem of heat radiation from high-temperature gas to the expansion joint is solved, thus protecting the gas turbine, reducing the thermal expansion of the expansion joint, and ensuring the safe operation of the gas turbine.
Patent Information
- Application Number
- CN202520348035.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-03-03
AI Technical Summary
The heat transfer from high-temperature gas to the non-metallic expansion joint causes an increase in its thermal expansion, which affects the normal operation of the gas turbine.
A high-temperature exhaust non-metallic expansion joint was designed. By setting extension cylinders, cotton blocks and baffles on the gas turbine flange, the thermal radiation effect of high-temperature airflow on the skin support is reduced. Insulating cotton blocks are filled in the interlayer to isolate heat transfer. Combined with the bracket, displacement is restricted to protect the gas turbine.
It effectively reduces the thermal expansion of the non-metallic expansion joint, protecting the safe operation of the gas turbine.
Smart Images
Figure CN223794875U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of non-metallic expansion joints, and in particular to a high-temperature exhaust non-metallic expansion joint. Background Technology
[0002] Non-metallic expansion joints are important components used in piping systems. When the piping system expands and contracts due to temperature changes, the non-metallic expansion joint can absorb these displacement changes through its own elastic deformation, compensating for displacements in multiple directions such as axial, lateral, and angular directions. However, when the exhaust temperature of the gas turbine is too high, the high-temperature gas heats the flange surface of the non-metallic expansion joint, causing the non-metallic expansion joint itself to expand thermally. The resulting thermal expansion can even have adverse effects on the gas turbine. Summary of the Invention
[0003] The purpose of this invention is to provide a high-temperature exhaust non-metallic expansion joint that can reduce the heat transfer of high-temperature gas to the non-metallic expansion joint, thereby reducing the thermal expansion of the non-metallic expansion joint itself.
[0004] The purpose of this utility model is achieved through the following technical solution: a high-temperature exhaust non-metallic expansion joint, including a left skin support and a right skin support, with a skin fixedly connected between the left skin support and the right skin support, and multiple bolt assemblies respectively connecting the left skin support and the right skin support to the skin, and a gas turbine flange slidably connected inside the left skin support.
[0005] An extension tube is welded to the gas turbine flange, which extends into the left skin support. Multiple fasteners are welded to the outer surface of the left skin support. A cotton block is arranged between the gas turbine flange and the left skin support, and the cotton block is fixed to the multiple fasteners by cable ties.
[0006] A partition is welded onto the left skin support, and the partition covers the extension cylinder of the gas turbine flange. Attached Figure Description
[0007] Figure 1 This is a schematic diagram of the overall structure of a non-metallic expansion joint.
[0008] Figure 2 This is a front view schematic diagram of a non-metallic expansion joint.
[0009] Figure 3 This is a schematic diagram of a half-section of a non-metallic expansion joint.
[0010] In the diagram: Support I 1; Support II 2; Gas turbine flange 3; Left skin support 4; Pipe flange 5; Cotton block 6; Fastener 7; Bolt assembly 8; Skin 9; Right skin support 10; Interlayer 11; Partition 12. Detailed Implementation
[0011] like Figure 1-3As shown, a detailed description of the high-temperature exhaust non-metallic expansion joint is provided: The high-temperature exhaust non-metallic expansion joint includes a left skin support 4 and a right skin support 10. A ring of skin 9 is fixed between the left skin support 4 and the right skin support 10 using a bolt assembly 8. The gas turbine flange 3 is connected to the exhaust port of the gas turbine, and the extension tube on the gas turbine flange 3 extends into the left skin support 4, so that the gas turbine flange 3 does not contact the non-metallic expansion joint. Therefore, when the high-temperature gas flow passes through the gas turbine flange 3, the extension tube on the gas turbine flange 3 reverses the gas flow, so that the gas flow passes through the non-metallic expansion joint and does not come into contact with the left skin support 4 and the right skin support 10. This reduces the thermal radiation effect of the high-temperature gas flow on the left skin support 4 and the right skin support 10, thereby reducing the thermal expansion of the non-metallic expansion joint itself, thus protecting the gas turbine.
[0012] A cotton block 6 is arranged between the gas turbine flange 3 and the left skin support 4, and the cotton block 6 and the fastener 7 on the outer surface of the left skin support 4 are connected by cable ties to fix the cotton block 6. The cotton block 6 can further prevent the heat radiation of the high-temperature airflow, thereby further reducing the thermal expansion of the non-metallic expansion joint itself. Fixing the cotton block 6 to the outer surface of the left skin support 4 with cable ties can effectively prevent the high-speed airflow from pulling the cotton block 6 away from the extension cylinder on the left skin support 4 and the gas turbine flange 3, thereby preventing the cotton block 6 from failing.
[0013] A baffle plate 12 is welded onto the left skin support 4. The baffle plate 12 covers the extension cylinder of the gas turbine flange 3 and shields the left skin support 4 and the right skin support 10, thereby preventing the high-temperature airflow from directly contacting the left skin support 4 and the right skin support 10. This allows the high-temperature airflow to directly heat the non-metallic expansion joint, further insulating the non-metallic expansion joint from heat and reducing its thermal expansion, thus further protecting the gas turbine.
[0014] A ring of interlayer 11 is welded between the right skin support 10 and the pipe flange 5, and the interlayer 11 is filled with cotton blocks 6 with heat insulation properties. When the pipe flange 5 is connected to the exhaust pipe, the high-temperature airflow heats the exhaust pipe, and the exhaust pipe will transfer the heat to the pipe flange 5. The interlayer 11 filled with cotton blocks 6 isolates the pipe flange 5 from the right skin support 10, reducing the heat radiation effect of the pipe flange 5, thereby effectively reducing the thermal expansion of the non-metallic expansion joint itself.
[0015] Bracket II2 is bolted to the left skin support 4 of the non-metallic expansion joint, and bracket I1 is bolted to the right side of bracket II2. Bracket I1 is used to provide auxiliary support for bracket II2, increasing the strength of bracket I1. Thus, when the thermal expansion of the exhaust pipe exceeds the adjustment amount of the non-metallic expansion joint, the non-metallic expansion joint will be pushed closer to the gas turbine. Bracket I1 and bracket II2 limit the displacement of the non-metallic expansion joint, thereby preventing the non-metallic expansion joint from having an adverse effect on the gas turbine and further protecting the gas turbine.
Claims
1. A high-temperature exhaust non-metallic expansion joint, characterized in that: It includes a left skin support (4) and a right skin support (10), with a skin (9) fixed between the left skin support (4) and the right skin support (10), and multiple bolt assemblies (8) connecting the left skin support (4) and the right skin support (10) to the skin (9), and a gas turbine flange (3) slidingly connected inside the left skin support (4).
2. The high-temperature exhaust non-metallic expansion joint according to claim 1, characterized in that: An extension tube is welded onto the gas turbine flange (3), the extension tube extends into the left skin support (4), and multiple fasteners (7) are welded onto the outer surface of the left skin support (4). A cotton block (6) is arranged between the gas turbine flange (3) and the left skin support (4), and the cotton block (6) and multiple fasteners (7) are fixed by cable ties.
3. The high-temperature exhaust non-metallic expansion joint according to claim 2, characterized in that: A partition (12) is welded onto the left skin support (4), and the partition (12) covers the extension tube of the gas turbine flange (3).
4. The high-temperature exhaust non-metallic expansion joint according to claim 1, characterized in that: The right skin support (10) is welded with a sandwich (11), and a pipe flange (5) is welded to the other side of the sandwich (11). The sandwich is filled with cotton blocks (6).
5. A high-temperature exhaust non-metallic expansion joint according to claim 3, characterized in that: The left skin support (4) is bolted to a bracket II (2), and the bracket II (2) is bolted to a bracket I (1).