Multi-stage sealing structure for gas turbine

Abstract

The utility model provides a multi-stage sealing structure for a gas turbine, belongs to the field of sealing equipment, and aims to solve the problem that convenient multi-stage sealing protection is inconvenient to carry out at the joint, the multi-stage sealing structure comprises a first connecting pipe, a first flange plate is fixedly connected to the first connecting pipe, and air conveying grooves are formed in the first flange plate and a second flange plate. During connection and sealing, the partition plate on the first flange plate can be inserted into the groove of the second flange plate to be aligned and limited, then the first flange plate and the second flange plate are connected and fixed through the bolts, and during connection and pressure application, the partition plate can extrude the third sealing gasket, and the first sealing gasket and the second sealing gasket can achieve double-layer sealing; when the outer side needs to be sealed and protected, the air bag is inflated, the air bags on the first flange plate and the second flange plate bulge to be attached, the re-sealing effect can be achieved, the sealing and protecting effect is improved, and the situation of air leakage in the using process is avoided.

Description

Technical Field

[0001] This utility model relates to the field of sealing equipment, and more specifically, to a multi-stage sealing structure for gas turbines. Background Technology

[0002] A gas turbine is a highly efficient device that converts the chemical energy of fuel into mechanical energy. Its working principle involves the flow of gas at high temperatures and pressures. Therefore, the design of the sealing system of a gas turbine is particularly critical. A multi-stage sealing structure is a design used to improve sealing performance and reliability. It employs multiple sealing elements or layers to achieve a higher sealing effect, thereby preventing liquid or gas leakage. This design helps to improve the overall sealing efficiency and durability, and is suitable for high-pressure, high-temperature, or harsh working environments. Multiple sealing layers can help distribute internal pressure and reduce the burden on individual sealing layers.

[0003] Currently, most multi-stage sealing structures used in gas turbines have the following problems:

[0004] Existing multi-stage sealing structures for gas turbines mostly rely on the combination of multiple gaskets and flanges to provide sealing protection when transporting gases and other substances in sealed pipelines, in order to prevent leakage. However, when pipelines are under high pressure for a long time, the gaskets at the connection points are prone to indentation or cracking. If the installation between the two flanges is not standardized, leakage is likely to occur, making it inconvenient to provide convenient multi-stage sealing protection at the connection points.

[0005] Therefore, we have made improvements to this by proposing a multi-stage sealing structure for gas turbines. Utility Model Content

[0006] The purpose of this utility model is to address the current problem of the inconvenience of providing convenient multi-level sealing protection for the connection.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] Multi-stage sealing structures for gas turbines are used to improve the above-mentioned problems.

[0009] The application is as follows:

[0010] The system includes a first connecting pipe, a first flange fixedly connected to the first connecting pipe, a second flange disposed on one side of the first flange, a second connecting pipe fixedly connected to the second flange, a first sealing gasket fixedly connected to the first flange and the second flange, a second sealing gasket fixedly connected to the first flange and the second flange, a partition fixedly connected to the first flange, a third sealing gasket fixedly connected to the second flange, a threaded sleeve rotatably connected to the first flange and the second flange, a turntable fixedly connected to the threaded sleeve, a threaded rod threadedly connected to the threaded sleeve, a piston plate rotatably connected to the threaded rod, a guide rod fixedly connected to the piston plate, and air delivery grooves formed inside the first flange and the second flange.

[0011] As a preferred technical solution of this application, the inner diameter of the first sealing gasket is larger than the inner diameter of the second sealing gasket, and the center lines of the partition and the third sealing gasket are at the same horizontal level.

[0012] As a preferred technical solution of this application, the threaded sleeves are distributed at equal angles on the first flange and the second flange, and the threaded sleeves correspond one-to-one with the piston plates through the threaded rods.

[0013] As a preferred technical solution of this application, the turntable is fixedly connected to the center of one end of the threaded sleeve, and the side end face of the piston plate is in contact with the inner side of the air delivery channel.

[0014] As a preferred technical solution of this application, gas supply pipes are fixedly connected to the first flange and the second flange, and air bladders are fixedly connected to the gas supply pipes. The guide rods are symmetrically distributed on the left and right sides of the piston plate.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] In the scheme of this application:

[0017] A partition is provided; during connection and sealing, the partition on the first flange can be inserted into the groove of the second flange for alignment and positioning. Then, the first and second flanges are connected and fixed using bolts. When pressure is applied during connection, the partition can compress the third gasket, and the first and second gaskets on the first and second flanges can achieve a sealing effect. The first and second gaskets can provide a double seal, improving the sealing effect at the connection between the first and second flanges. When external sealing protection is required, the air bladder is inflated, and the air bladders on the first and second flanges bulge and fit together, achieving a second sealing effect. Multiple threaded sleeves can be rotated according to the connection between the first and second flanges to adjust the inflation volume, improve the sealing protection effect, and prevent air leakage during use. Attached Figure Description

[0018] Figure 1 A three-dimensional structural diagram of the multi-stage sealing structure for a gas turbine provided in this application;

[0019] Figure 2 A side view of the first flange structure of the multi-stage sealing structure for a gas turbine provided in this application;

[0020] Figure 3 A side view of the diaphragm structure for a multi-stage sealing structure for a gas turbine provided in this application;

[0021] Figure 4 The multi-stage sealing structure for gas turbines provided in this application Figure 2 Enlarged structural diagram at point A in the middle;

[0022] Figure 5 The multi-stage sealing structure for gas turbines provided in this application Figure 2 Enlarged structural diagram at point B;

[0023] Figure 6 This is a side view of the threaded sleeve structure for a multi-stage sealing structure for a gas turbine provided in this application.

[0024] The diagram shows: 1. First connecting pipe; 2. First flange; 3. Second flange; 4. Second connecting pipe; 5. First sealing gasket; 6. Second sealing gasket; 7. Partition plate; 8. Third sealing gasket; 9. Threaded sleeve; 10. Turntable; 11. Threaded rod; 12. Piston plate; 13. Guide rod; 14. Air duct; 15. Air supply pipe; 16. Airbag. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0026] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely to illustrate some embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0027] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] In the description of this utility model, it should be noted that the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms are 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, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0030] Example 1:

[0031] like Figure 1-6 As shown, this embodiment proposes a multi-stage sealing structure for a gas turbine, including a first connecting pipe 1, a first flange 2 fixedly connected to the first connecting pipe 1, a second flange 3 provided on one side of the first flange 2, a second connecting pipe 4 fixedly connected to the second flange 3, a first sealing gasket 5 fixedly connected to the first flange 2 and the second flange 3, a second sealing gasket 6 fixedly connected to the first flange 2 and the second flange 3, a partition 7 fixedly connected to the first flange 2, a third sealing gasket 8 fixedly connected to the second flange 3, a threaded sleeve 9 rotatably connected to the first flange 2 and the second flange 3, a turntable 10 fixedly connected to the threaded sleeve 9, a threaded rod 11 threadedly connected to the threaded sleeve 9, a piston plate 12 rotatably connected to the threaded rod 11, a guide rod 13 fixedly connected to the piston plate 12, and air delivery slots 14 opened inside the first flange 2 and the second flange 3.

[0032] Example 2:

[0033] The solution in Example 1 will be further described below with reference to its specific working method.

[0034] like Figure 4 As shown, in a preferred embodiment, based on the above method, the inner diameter of the first sealing gasket 5 is larger than the inner diameter of the second sealing gasket 6, and the center lines of the partition 7 and the third sealing gasket 8 are at the same horizontal line, which can ensure that the partition 7 on the first flange 2 is inserted into the third sealing gasket 8 in the second flange 3, and can play an alignment and limiting effect.

[0035] like Figure 6As shown, in a preferred embodiment, based on the above method, the threaded sleeves 9 are further distributed at equal angles on the first flange 2 and the second flange 3. The threaded sleeves 9 correspond one-to-one with the piston plates 12 through the threaded rods 11, which can ensure that the piston plates 12, which are distributed at equal angles, can perform multiple rotations of gas delivery according to the gas filling situation when pushing and delivering gas.

[0036] like Figure 5 As shown, in a preferred embodiment, based on the above method, the turntable 10 is further fixedly connected to the center of one end of the threaded sleeve 9, and the side end face of the piston plate 12 is in contact with the inner side of the air conveying channel 14, which can ensure that the piston plate 12 can smoothly push the gas in the air conveying channel 14 for conveying when it moves.

[0037] like Figure 5 As shown, in a preferred embodiment, based on the above method, a gas supply pipe 15 is fixedly connected to the first flange 2 and the second flange 3, and an air bag 16 is fixedly connected to the gas supply pipe 15. Guide rods 13 are symmetrically distributed on the left and right sides of the piston plate 12, which can ensure that the guide rods 13 on both sides can stably support the piston plate 12 to move.

[0038] Specifically, the multi-stage sealing structure originally designed for gas turbines, when in use: combined with Figure 1-6 When gas turbines require gas delivery and heat dissipation, and the first connecting pipe 1 and the second connecting pipe 4 for gas delivery need to be connected and sealed, the partition 7 on the first flange 2 can be inserted into the groove of the second flange 3 for alignment and positioning. Then, the first flange 2 and the second flange 3 are connected and fixed with bolts. When pressure is applied during connection, the partition 7 can squeeze the third sealing gasket 8, and the first sealing gasket 5 and the second sealing gasket 6 on the first flange 2 and the second flange 3 can achieve a sealing effect. The first sealing gasket 5 and the second sealing gasket 6 can achieve a double seal, improving the sealing effect at the connection between the first flange 2 and the second flange 3.

[0039] When external sealing protection is required, the turntable 10 can be rotated to drive the threaded sleeve 9 to rotate. The threaded sleeve 9 can push the threaded rod 11 to move the piston plate 12. When moving, the piston plate 12 can move smoothly with the support of the guide rod 13. The piston plate 12 can transport the gas in the air duct 14 to the air bag 16 through the air pipe 15 for inflation. The air bag 16 on the first flange 2 and the second flange 3 bulge and fit together, which can achieve a second sealing effect. Multiple threaded sleeves 9 can be rotated according to the connection between the first flange 2 and the second flange 3 to adjust the inflation volume and improve the sealing protection effect. This facilitates the gas supply between the first connecting pipe 1 and the second connecting pipe 4 to improve the heat dissipation effect of the gas turbine and avoid gas leakage during use.

[0040] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, the present utility model is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present utility model, as well as all technical solutions and improvements that do not depart from the spirit and scope of practicality, are covered within the scope of the claims of the present utility model.

Claims

1. A multi-stage sealing structure for a gas turbine, comprising a first connecting pipe (1), characterized in that, A first flange (2) is fixedly connected to the first connecting pipe (1). A second flange (3) is provided on one side of the first flange (2). A second connecting pipe (4) is fixedly connected to the second flange (3). A first sealing gasket (5) is fixedly connected to the first flange (2) and the second flange (3). A second sealing gasket (6) is fixedly connected to the first flange (2) and the second flange (3). A partition plate (7) is fixedly connected to the first flange (2). The second flange (4) 3) A third sealing gasket (8) is fixedly connected to the upper flange. A threaded sleeve (9) is rotatably connected to the first flange (2) and the second flange (3). A turntable (10) is fixedly connected to the threaded sleeve (9). A threaded rod (11) is threadedly connected to the threaded sleeve (9). A piston plate (12) is rotatably connected to the threaded rod (11). A guide rod (13) is fixedly connected to the piston plate (12). An air duct (14) is opened in the first flange (2) and the second flange (3).

2. The multi-stage sealing structure for a gas turbine according to claim 1, characterized in that, The inner diameter of the first sealing gasket (5) is larger than the inner diameter of the second sealing gasket (6), and the center lines of the partition (7) and the third sealing gasket (8) are at the same horizontal level.

3. The multi-stage sealing structure for a gas turbine according to claim 1, characterized in that, The threaded sleeves (9) are distributed at equal angles on the first flange (2) and the second flange (3), and the threaded sleeves (9) correspond one-to-one with the piston plates (12) through the threaded rods (11).

4. The multi-stage sealing structure for a gas turbine according to claim 1, characterized in that, The turntable (10) is fixedly connected to the center of one end of the threaded sleeve (9), and the side end face of the piston plate (12) is in contact with the inner side of the air duct (14).

5. A multi-stage sealing structure for a gas turbine according to claim 1, characterized in that, Gas supply pipes (15) are fixedly connected to the first flange (2) and the second flange (3), and air bags (16) are fixedly connected to the gas supply pipes (15). The guide rods (13) are symmetrically distributed on the left and right sides of the piston plate (12).

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