Sealing plug for gas turbine borescope hole

Abstract

The utility model relates to the technical field of gas turbine sealing, and discloses a sealing plug of a gas turbine hole inspection hole, which comprises a threaded plug, a mounting groove is arranged at the bottom of the threaded plug, a knuckle bearing is arranged in the mounting groove, a sliding rod is arranged in the knuckle bearing in a sliding manner, and one end of the sliding rod penetrates through the knuckle bearing and is arranged in the mounting groove. A sealing head is arranged at the other end of the sliding rod, the sliding rod is sleeved with a spring, and the spring is arranged between the knuckle bearing and the sealing head. The sealing plug is convenient to produce and assemble, can smoothly plug the hole exploration hole, and effectively improves the using effect of the sealing plug.

Description

Technical Field

[0001] The utility model relates to the technical field of gas turbine sealing, in particular to a sealing plug for a gas turbine hole exploration hole. Background Art

[0002] Gas turbines are machines that operate for extended periods of time. During downtime inspections, borescope inspections of internal components are necessary. Therefore, borescope inspection holes are required in the gas turbine casing to allow inspection of internal components without disassembling the turbine. To prevent gas leakage from the gas turbine, the borescope holes must be sealed during operation.

[0003] For example, the Chinese utility model with patent number CN204855163U discloses a borescope plug for sealing an outer casing and an inner casing, wherein the outer casing and the inner casing are provided with holes, and the borescope plug includes a plug and a pin rod, an accommodating portion is provided on one end of the plug, one end of the pin rod is provided in the accommodating portion, and a sealing boss is provided on the middle part of the pin rod, the other end of the plug is connected to the outer casing, the pin rod and the plug are detachably connected, the plug is used to seal the hole on the outer casing, and when the pin rod is adapted to the plug, the sealing boss blocks the hole on the inner casing.

[0004] There are at least the following problems in the above patent: first, during the production process, it is troublesome to insert the pin into the ring groove to lock the pin rod; second, during the installation process, the pin rod swings and slides inside the pin, and finally there will be a sense of stagnation when tightening the plug. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model develops a sealing plug for a gas turbine hole exploration hole. The utility model is convenient for production and assembly and can smoothly seal the hole exploration hole, thereby effectively improving the use effect of the sealing plug.

[0006] The technical solution of the utility model to solve the technical problem is: a sealing plug for a gas turbine hole exploration hole, including a threaded plug, a mounting groove is provided at the bottom of the threaded plug, a joint bearing is provided in the mounting groove, a sliding rod is provided for sliding in the joint bearing, one end of the sliding rod passes through the joint bearing and is arranged in the mounting groove, the other end of the sliding rod is provided with a sealing head, a spring is provided on the sliding rod, and the spring is arranged between the joint bearing and the sealing head.

[0007] As an optimization, an annular baffle is provided in the middle of the mounting groove, and a groove is provided at the opening of the mounting groove. The inner side of the spherical plain bearing abuts against the annular baffle. A removable retaining ring is provided in the groove, and the retaining ring abuts against the outer side of the spherical plain bearing. The annular baffle and retaining ring can both limit the position of the spherical plain bearing and facilitate assembly.

[0008] As an optimization, one end of the slide bar is provided with a stopper. By providing the stopper, the slide bar can be prevented from coming out of the spherical bearing.

[0009] As an optimization, a positioning rod is provided at the bottom center of the sealing head. The positioning rod can be inserted into the hole probe for preliminary positioning during sealing and can prevent the sealing head from accidentally falling out of the hole probe.

[0010] As an optimization, a protective sleeve is provided on the top of the sealing head, and the bottom of the spring is arranged in the protective sleeve. By providing the protective sleeve, the spring can be protected and prevented from being dislocated.

[0011] As an optimization, the spring diameter gradually decreases from the middle to the top. This can be used in conjunction with the spherical bearing to prevent collision with the threaded plug when the slide bar swings, thus preventing the slide bar from swinging.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] By setting a threaded plug, a sealed connection with the shell hole can be achieved; by setting a mounting groove, a joint bearing can be installed, and space can be provided for the sliding and swinging of the slide rod; by setting a joint bearing, it can be convenient for assembly and the slide rod can be limited, so that the slide rod can slide up and down smoothly in the joint bearing, and the slide rod can swing smoothly through the joint bearing, so that the center line of the slide rod and the center line of the threaded plug form an angle, so that the threaded plug and the sealing head are respectively adapted to the shell hole and the borehole; by setting the slide rod and the sealing head, it can penetrate deep into the shell and dock with the borehole to complete the sealing; by setting a spring, the sealing head can be pressed against the borehole to enhance the sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front view of an embodiment of the utility model.

[0015] Figure 2 This is a schematic diagram of the internal structure of an embodiment of the present utility model.

[0016] Figure 3 This is a schematic diagram of an embodiment of the utility model when in use.

[0017] In the figure: 1. Threaded plug; 2. Mounting groove; 3. Spherical bearing; 4. Slide rod; 5. Limiting piece; 6. Sealing head; 7. Spring; 8. Annular baffle; 9. Retaining ring; 10. Positioning rod; 11. Protective sleeve; 12. Housing hole; 13. Hole exploration hole. DETAILED DESCRIPTION

[0018] In order to clearly illustrate the technical features of this solution, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0019] Example 1

[0020] Figures 1 to 3 An embodiment of the present invention is as follows: Figures 1 to 3 As shown, a sealing plug for a gas turbine borehole includes a threaded plug 1, a mounting groove 2 is provided at the bottom of the threaded plug 1, a spherical bearing 3 is provided in the mounting groove 2, a slide rod 4 is slidably provided in the spherical bearing 3, one end of the slide rod 4 passes through the spherical bearing 3 and is arranged in the mounting groove 2, the other end of the slide rod 4 is provided with a sealing head 6, a spring 7 is sleeved on the slide rod 4, and the spring 7 is arranged between the spherical bearing 3 and the sealing head 6.

[0021] By setting the threaded plug 1, it can be sealed and connected to the shell hole 12; by setting the installation groove 2, the joint bearing 3 can be installed, and space can be provided for the sliding and swinging of the slide rod 4; by setting the joint bearing 3, it can be convenient for assembly, and the slide rod 4 can be limited, so that the slide rod 4 can slide up and down smoothly in the joint bearing 3, and the slide rod 4 can swing smoothly through the joint bearing 3, so that the center line of the slide rod 4 forms an angle with the center line of the threaded plug 1, so that the threaded plug 1 and the sealing head 6 are respectively adapted to the shell hole 12 and the borehole 13; by setting the slide rod 4 and the sealing head 6, it is possible to penetrate deep into the shell and dock with the borehole 13 to complete the sealing; by setting the spring 7, the sealing head 6 can be pressed against the borehole 13 to enhance the sealing performance.

[0022] like Figure 2 As shown, an annular baffle 8 is provided in the middle of the mounting groove 2, and a groove is provided at the opening of the mounting groove 2. The inner side of the spherical plain bearing 3 abuts against the annular baffle 8. A detachable retaining ring 9 is provided in the groove, and the retaining ring 9 abuts against the outer side of the spherical plain bearing 3. The provision of the annular baffle 8 and the retaining ring 9 can prevent the spherical plain bearing 3 from falling out and facilitate assembly.

[0023] like Figure 2 As shown, one end of the slide bar 4 is provided with a stopper 5. By providing the stopper 5, the slide bar 4 can be prevented from coming out of the spherical bearing 3.

[0024] like Figures 1 to 3 As shown, a positioning rod 10 is provided at the center of the bottom of the sealing head 6. By providing the positioning rod 10, it can be inserted into the hole 13 for preliminary positioning during sealing, and can prevent the sealing head 6 from accidentally escaping from the hole 13.

[0025] like Figures 1 to 3 As shown, a protective sleeve 11 is provided on the top of the sealing head 6, and the bottom of the spring 7 is arranged in the protective sleeve 11. By providing the protective sleeve 11, the spring 7 can be protected and prevented from being misplaced.

[0026] like Figures 1 to 3As shown, the diameter of the spring 7 gradually decreases from the middle to the top. It can cooperate with the spherical bearing 3 and avoid collision with the threaded plug 1 when the slide bar 4 swings, preventing the slide bar 4 from swinging.

[0027] When the cam 12 is in the air, the spring 7 is pulled out of the airtight container 1 and the cam 13 is tightened to the airtight container 1. When the cam 12 is in the air, the spring 7 is pulled out of the airtight container 1 and the cam 13 is tightened to the airtight container 1. When the cam 12 is in the air, the spring 7 is pulled out of the airtight container 1 and the cam 13 is tightened to the airtight container 1.

[0028] The descriptions of the orientation or relative position relationship of the structure in the present invention, such as the orientation or relative position relationship indicated by "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., are based on the orientation or position relationship shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the structure referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

Claims

1. A sealing plug for a gas turbine borehole, comprising a threaded plug (1), characterized in that: The bottom of the threaded plug (1) is provided with a mounting groove (2), a joint bearing (3) is provided in the mounting groove (2), a slide rod (4) is slidably provided in the joint bearing (3), one end of the slide rod (4) passes through the joint bearing (3) and is provided in the mounting groove (2), the other end of the slide rod (4) is provided with a sealing head (6), a spring (7) is sleeved on the slide rod (4), and the spring (7) is provided between the joint bearing (3) and the sealing head (6).

2. The sealing plug for the gas turbine bore according to claim 1, characterized in that: An annular baffle (8) is provided in the middle of the installation groove (2), a groove is provided at the opening of the installation groove (2), the inner side of the joint bearing (3) abuts against the annular baffle (8), a detachable retaining ring (9) is provided in the groove, and the retaining ring (9) abuts against the outer side of the joint bearing (3).

3. The sealing plug for the gas turbine bore according to claim 2, characterized in that: One end of the slide bar (4) is provided with a limiting member (5).

4. The sealing plug for the gas turbine bore according to claim 3, characterized in that: A positioning rod (10) is provided at the center of the bottom of the sealing head (6).

5. The sealing plug for a gas turbine bore according to any one of claims 1 to 4, characterized in that: A protective sleeve (11) is provided on the top of the sealing head (6), and the bottom of the spring (7) is arranged in the protective sleeve (11).

6. The sealing plug for the gas turbine bore according to claim 5, characterized in that: The diameter of the spring (7) gradually decreases from the middle to the top.

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