Thermal compensation nonmetal expansion joint

Abstract

The utility model provides a thermal compensation nonmetal expansion joint which comprises an inlet flange, an outlet flange, an inlet guide plate, an outlet guide plate, a skin, a skin pressing plate, an inlet heat preservation nail, an outlet heat preservation nail and a heat preservation layer. The inlet guide plate and the inlet flange as well as the outlet guide plate and the outlet flange of the expansion joint adopt assembly structures, so that the thermal expansion amount of the expansion joint caused by temperature change can be effectively eliminated; the conical design is adopted for the flow guide plate of the expansion joint, from the perspective of structural mechanics, the shape can remarkably improve the strength of the whole structure, and the stability and durability of the expansion joint are enhanced; the skin of the expansion joint adopts an assembly structure, the adjusting amount is large, and maintenance is convenient; the expansion joint has the advantages of being simple in structure, easy to produce and machine and stable in performance, adopting a split structure, and prolonging the service life of the expansion joint.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas turbine equipment technical field, concretely is a kind of thermal compensation nonmetal expansion joint. BACKGROUND

[0002] In gas turbine field, expansion joint is needed between gas turbine exhaust horizontal section and exhaust diffuser to compensate the connecting deviation caused by prefabrication, installation and other links;And, during the operation of gas turbine, a large amount of high-temperature gas is discharged from the tail end of gas turbine, which can cause thermal expansion of the components in contact with high-temperature airflow;If this thermal expansion cannot be effectively compensated, the expansion joint is prone to deformation, damage and other conditions, which poses a great safety hazard.

[0003] The existing expansion joint has certain defects in compensation effect and high-temperature resistance, and cannot effectively compensate the thermal expansion amount generated by gas turbine;Moreover, such expansion joint is used in a special position and harsh environment, and the subsequent maintenance cost is high, so the overall strength needs to be improved;Therefore, it is of great significance to develop a new type of thermal compensation nonmetal expansion joint. SUMMARY

[0004] The utility model discloses a kind of thermal compensation nonmetal expansion joints to solve the above technical problems.

[0005] To achieve the above object, the utility model adopts the following technical scheme: a kind of thermal compensation nonmetal expansion joint, including inlet flange, outlet flange, inlet deflector, outlet deflector, skin, skin pressing plate, inlet heat preservation nail, outlet heat preservation nail and heat preservation layer.

[0006] The inlet flange, the outlet flange, the inlet deflector and the outlet deflector are all selected from low-alloy high-strength steel material;This material has high endurance strength under high-temperature environment.

[0007] The inlet deflector and the outlet deflector are in the shape of a tapered cylinder;From the principle of structural mechanics, this shape has good stress dispersion characteristics, which can significantly enhance the overall strength of the component;At the same time, the tapered cylinder-shaped deflector can guide the flow of high-temperature gas, reduce the impact of high-temperature gas on the internal structure of the expansion joint, and thus prolong the service life of the expansion joint.

[0008] The skin is made of steel wire glass fiber cloth, alkali-free bulk cloth and silicone rubber material;Under high-temperature conditions, the skin shows good temperature resistance, flexibility and sealing performance.

[0009] The skin pressing plate, the inlet heat preservation nail and the outlet heat preservation nail are all made of stainless steel material;Stainless steel material not only has good corrosion resistance, but also can meet the use requirements under high-temperature environment.

[0010] The heat preservation layer is selected from Morgan insulation cotton and aluminum silicate fiber felt material; the two materials have excellent heat insulation performance, and help to improve the heat preservation effect of the expansion joint.

[0011] The inlet guide plate and the inlet heat preservation pin adopt an assembly structure, and the outlet guide plate and the outlet heat preservation pin also adopt an assembly structure; when high-temperature airflow passes through, the inlet guide plate and the outlet guide plate will expand due to heating, therefore, the inlet heat preservation pin and the connecting hole on the inlet guide plate are reserved with an expansion installation allowance, and the outlet heat preservation pin and the connecting hole on the outlet guide plate are also reserved with an expansion installation allowance; the expansion installation allowances can effectively compensate the generated thermal expansion amount. Advantages

[0012] The expansion joint can effectively eliminate the thermal expansion amount generated by the expansion joint due to temperature change, and can significantly improve the strength of the whole structure, enhance the stability and durability of the expansion joint, increase the service life of the expansion joint, and reduce the subsequent maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0014] The utility model is further illustrated by combining with the drawings and embodiments: embodiment 1: a kind of thermal compensation nonmetal expansion joint, including outlet flange 1, outlet guide plate 2, outlet heat preservation pin 3, inlet guide plate 4, inlet heat preservation pin 5, inlet flange 6, skin pressing plate 7, skin 8 and heat preservation layer 9.

[0015] Further as shown in Figure 1 The inlet heat preservation pin 5 is welded on the inner side of the inlet flange 6, and it should be noted that the welding position of the inlet heat preservation pin 5 should be close to the inner side, so as to leave installation space for the flange connecting bolt between components;The welding quantity of the inlet heat preservation pin 5 is evenly distributed in multiple places around the circumference, to ensure firm welding.

[0016] Further as shown in Figure 1 The outlet heat preservation pin 3 is welded on the inner side of the outlet flange 1, and it should be noted that the welding position of the outlet heat preservation pin 3 should be close to the inner side, so as to leave installation space for the flange connecting bolt between components;The welding quantity of the outlet heat preservation pin 3 is also evenly distributed in multiple places around the circumference, to ensure firm welding.

[0017] Further as shown in Figure 1 The inlet guide plate 4 is connected with the inlet heat preservation pin 5, and after adjusting the position, gasket and nut are used for pressing.

[0018] Further as shown in Figure 1As shown: the outlet guide vane 2 is connected with the outlet heat preservation nail 3, after adjusting the position, the gasket and nut are used to press tightly.

[0019] Further as Figure 1 As shown: after the installation of the inlet flange 6, the inlet heat preservation nail 5, the outlet flange 1, the outlet heat preservation nail 3, the inlet guide vane 4 and the outlet guide vane 2 is completed, the heat preservation layer 9 is filled, at this time, the interval of the inlet flange 6 and the outlet flange 1 can be adjusted according to the actual situation.

[0020] Further as Figure 1 As shown: the skin 8 is installed, one end of the skin 8 is installed on the inlet flange 6, the other end of the skin 8 is installed on the outlet flange 1, then the skin is fixed by using the skin pressing plate 7 through bolts; during the installation process, it is ensured that the skin is installed tightly, and the leakage phenomenon is avoided.

[0021] In conclusion, the heat compensation nonmetal expansion joint has good application prospect.

Claims

1. A thermally compensated non-metallic expansion joint, comprising an inlet flange (6) and an outlet flange (1), characterized in that: An inlet insulation nail (5) is provided on the inner side of the inlet flange (6), an outlet insulation nail (3) is provided on the inner side of the outlet flange (1), an inlet guide plate (4) is provided on the inlet insulation nail (5), an outlet guide plate (2) is provided on the outlet insulation nail (3), a skin (8) is provided on the inlet flange (6), the other end of the skin (8) is provided on the outlet flange (1), a skin pressure plate (7) is provided on the outside of the skin (8), and an insulation layer (9) is provided inside the skin (8).

2. The thermally compensated non-metallic expansion joint according to claim 1, characterized in that: The inlet guide plate (4) and the outlet guide plate (2) are cone-shaped.

3. The thermally compensated non-metallic expansion joint according to claim 1, characterized in that: The inlet insulation nail (5) is welded to the inside of the inlet flange (6); the outlet insulation nail (3) is welded to the inside of the outlet flange (1).

4. The thermally compensated non-metallic expansion joint according to claim 1, characterized in that: The inlet guide plate (4) and the inlet insulation nail (5) adopt an assembly structure; the outlet guide plate (2) and the outlet insulation nail (3) also adopt an assembly structure.

5. The thermally compensated non-metallic expansion joint according to claim 1, characterized in that: The insulation layer (9) is made of Morgan insulation cotton and aluminum silicate fiber felt.

6. The thermally compensated non-metallic expansion joint according to claim 1, characterized in that: The inlet flange (6), the inlet guide plate (4), the outlet flange (1) and the outlet guide plate (2) are all made of low alloy high strength steel; the inlet insulation nail (5), the outlet insulation nail (3) and the skin pressure plate (7) are all made of stainless steel; the skin (8) is made of steel wire fiberglass cloth, alkali-free expanded cloth and silicone rubber.

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