A pin removal tool for a steam turbine stator section cover

Abstract

The utility model relates to steam turbine maintenance technical field especially relates to a kind of pin removal tool of steam turbine stator part sleeve, the pin removal tool of steam turbine stator part sleeve includes base, the top of the base is fixedly installed with support fixed cylinder, the inner surface of the support fixed cylinder is equipped with movable hole, the top of the support fixed cylinder is installed with elastic expansion piece, the upper end of the elastic expansion piece is fixedly installed with shaft seat, the inner surface of the shaft seat is installed with rotating rod. By setting base and support fixed cylinder above stator part sleeve, and setting elastic expansion piece and shaft seat between support fixed cylinder and rotating rod, downward pressure can be provided for tapping operation, thereby saving a lot of manual pressure, and using base and support fixed cylinder, tapping can be more stable during downspiral, and tapping deviation can be avoided.

Description

Technical Field

[0001] This utility model relates to the field of steam turbine maintenance technology, and in particular to a tool for removing pins from the stator sleeve of a steam turbine. Background Technology

[0002] As the core prime mover in modern thermal power plants, steam turbines use steam as power to efficiently convert the thermal energy of steam into mechanical work, occupying an irreplaceable and vital position in the power generation field. To ensure the long-term stable and efficient operation of steam turbines, their components need to be regularly maintained and replaced according to their degree of wear and tear.

[0003] In the stator assembly of a steam turbine, locating pins play a crucial role in positioning and securing the turbine. However, due to the high temperature, humidity, and corrosive media in the long-term operating environment, these pins are prone to corrosion and adhesion, making them difficult to remove from the assembly. Currently, the common method for removing such corroded pins is to first re-drill and tap the hole, then install hexagonal screws and use a wrench to remove the pin. However, to avoid the risk of tap breakage during the tapping process, manual operation of the tap is usually required. This manual operation not only requires operators to continuously rotate and press down on the tap, resulting in extremely high labor intensity, but also makes it difficult to maintain stable force and rotation angle during operation. This can easily lead to operational deviations affecting the tapping quality, resulting in low pin removal efficiency, extended maintenance cycles, and severely restricting the turbine's overhaul progress and overall operation and maintenance efficiency. Utility Model Content

[0004] The purpose of this invention is to solve the problems of existing technologies that require manual rotation and pressing during operation, which is laborious and has poor stability. It provides a tool for removing pins from the stator sleeve of a steam turbine that can save a lot of manual pressing force. Furthermore, by using a base and a support fixing cylinder, it can make the tapping process more stable and avoid tapping deviation.

[0005] To achieve the above objectives, this utility model provides a tool for removing pins from a turbine stator sleeve, comprising a base, a support cylinder fixedly mounted on the top of the base, a movable hole on the inner surface of the support cylinder, an elastic telescopic component mounted on the top of the support cylinder, a shaft seat fixedly mounted on the upper end of the elastic telescopic component, a rotating rod mounted on the inner surface of the shaft seat, and a tap fixedly mounted on the lower end of the rotating rod through the movable hole, a horizontally arranged rotating arm fixedly mounted on the upper end of the rotating rod, the lower surface of the base being disposed on the stator sleeve, a pin being disposed on the stator sleeve, an opening being formed on the upper surface of the pin, and a tap being disposed within the opening.

[0006] As a further description of the above technical solution: the elastic telescopic component includes a sleeve and a movable rod that are movably connected to each other. The sleeve has a movable cavity, and a spring is installed in the movable cavity. The sleeve and the movable rod are connected by the spring.

[0007] As a further description of the above technical solution: a plurality of elastic telescopic components are provided, and the plurality of elastic telescopic components are arranged in a ring on the bearing seat.

[0008] As a further description of the above technical solution: the bearing seat includes an outer bushing and an inner bushing, the elastic telescopic member is fixedly connected to the outer bushing, the outer bushing and the inner bushing are rotatably connected, and the outer surface of the rotating rod is fixedly connected to the inner bushing.

[0009] As a further description of the above technical solution: the rotating rod and the tapping tap are fixedly connected by a fixed mounting sleeve.

[0010] As a further description of the above technical solution: the bottom of the base is provided with a magnetic base, and the bottom of the magnetic base is provided with a magnetic plate.

[0011] As a further description of the above technical solution: two symmetrically arranged centering rods are installed through the base, and the centering rods are slidably installed on the base. The outer surface of the centering rods is provided with scale strips.

[0012] The above technical solution has the following advantages or beneficial effects:

[0013] This invention provides downward pressure during tapping operations by setting a base and a support cylinder above the stator sleeve, and by setting an elastic telescopic component and a shaft seat between the support cylinder and the rotating rod. This saves a lot of manual force for pressing down. Furthermore, the base and support cylinder make the tapping process more stable and prevent tapping deviation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a tool for removing pins from the stator sleeve of a steam turbine according to one embodiment of the present invention;

[0015] Figure 2 for Figure 1 Schematic diagram of the structure of the medium-elasticity telescopic component;

[0016] Figure 3 for Figure 1 A schematic diagram of the structure of the central base.

[0017] Legend:

[0018] 1. Base; 2. Support and fixing cylinder; 3. Movable hole; 4. Elastic telescopic component; 5. Shaft seat; 6. Rotating rod; 7. Rotating arm; 8. Fixed mounting sleeve; 9. Tapping tap; 10. Stator sleeve; 11. Pin; 12. Opening; 13. Magnetic seat; 14. Centering rod; 15. Scale bar; 41. Rod sleeve; 42. Movable rod; 43. Spring; 44. Movable cavity. Detailed Implementation

[0019] 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.

[0020] In the description of this utility model, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] like Figure 1-3 As shown, this utility model discloses a pin removal tool for a turbine stator sleeve, comprising a base 1, a support fixing cylinder 2 fixedly installed on the top of the base 1, a movable hole 3 opened on the inner surface of the support fixing cylinder 2, an elastic telescopic component 4 installed on the top of the support fixing cylinder 2, a shaft seat 5 fixedly installed on the upper end of the elastic telescopic component 4, a rotating rod 6 installed on the inner surface of the shaft seat 5, and a tap 9 fixedly installed through the movable hole 3 at the lower end of the rotating rod 6, a horizontally arranged rotating arm 7 fixedly installed at the upper end of the rotating rod 6, the lower surface of the base 1 being disposed on the stator sleeve 10, a pin 11 being disposed on the stator sleeve 10, an opening 12 opened on the upper surface of the pin 11, and a tap 9 being disposed in the opening 12.

[0023] In the technical solution of this utility model, firstly, a hole 12 is drilled at the center of the top of the pin 11 using a drilling device. Then, the rotating rod 6 is pulled upward, causing the spring of the elastic telescopic component 4 to be stretched. Next, the base 1 is installed on the upper surface of the stator sleeve 10, so that the tapping tap 9 is placed in the hole 12. Then, the rotating arm 7 is rotated, which can drive the rotating rod 6 and the tapping tap 9 to rotate synchronously. During the rotation, the return force of the spring 43 can keep the bearing seat 5 and the rotating rod 6 in a downward state, thereby saving a certain amount of manual downward force and facilitating the tapping work. After tapping is completed, only the hexagonal screw needs to be installed. After tapping the threaded hole, add a loosening agent between the pin and the stator sleeve. Then, use a wrench mounted on the hexagonal screw to rotate and pull out the pin. This pin removal tool can be used for tapping work during pin removal. By setting a base 1 and a support fixing cylinder 2 above the stator sleeve, and setting an elastic telescopic component 4 and a shaft seat 5 between the support fixing cylinder 2 and the rotating rod 6, downward pressure can be provided during the tapping operation, thereby saving a lot of manual downward pressure force. Furthermore, by using the base 1 and the support fixing cylinder 2, the tapping downward rotation process can be made more stable, avoiding tapping deviation.

[0024] The movable hole 3 provides vertical space for the rotating rod 6 and constrains its horizontal displacement, ensuring that the tap 9 is accurately fed vertically during tapping and preventing tap breakage due to shaking. The cooperation between the rotating rod 6 and the movable hole 3, as well as the positioning function of the bearing 5, ensure that the tap 9 always coincides with the pin axis during rotation, preventing thread deviation.

[0025] like Figure 1 and Figure 2 As shown, the elastic telescopic component 4 includes a sleeve 41 and a movable rod 42 that are movably connected to each other. The sleeve 41 has a movable cavity 44, and a spring 43 is installed in the movable cavity 44. The sleeve 41 and the movable rod 42 are connected by the spring 43. The elastic force of the spring 43 pulls the sleeve 41, the bearing 5 and the rotating rod 6 downward, so that the tapping tap 9 obtains continuous and stable axial pressure during tapping, replacing the traditional manual pressing operation and reducing labor intensity.

[0026] Among them, there are several elastic telescopic components 4, and the several elastic telescopic components 4 are arranged in a ring on the bearing seat 5.

[0027] like Figure 1 and Figure 2As shown, the bearing seat 5 includes an outer bushing and an inner bushing. The elastic telescopic member 4 is fixedly connected to the outer bushing, and the outer bushing and the inner bushing are rotatably connected. The outer surface of the rotating rod 6 is fixedly connected to the inner bushing. When the operator rotates the rotating rod 6 through the rotating arm 7, the inner bushing of the bearing seat 5 drives the rotating rod 6 to rotate synchronously, accurately transmitting the rotational torque to the tap 9 to achieve efficient tapping. The rotatable connection design between the outer bushing and the inner bushing makes the axial pressure of the elastic telescopic member 4 and the rotational movement of the rotating rod 6 independent of each other, avoiding interference between the two movements and ensuring operational stability.

[0028] like Figure 1 As shown, the rotating rod 6 and the tapping tap 9 are fixedly connected by a fixed mounting sleeve 8. The fixed mounting sleeve 8 is fitted between the lower end of the rotating rod 6 and the tapping tap 9 and is fixed by bolts or interference fit to ensure a rigid connection between the rotating rod 6 and the tapping tap 9. This prevents the tapping tap from falling off or wobbling due to loose connection during the tapping process and ensures the tapping quality.

[0029] like Figure 1 and Figure 2 As shown, a magnetic base 13 is provided at the bottom of the base 1, and a magnetic plate is provided at the bottom of the magnetic base 13; the magnetic base 13 is magnetically attached to the surface of the stator sleeve 10, ensuring that the tool is stable and does not deviate during operation, and avoiding tapping deviation caused by the shaking of the base.

[0030] like Figure 1 and Figure 3 As shown, two symmetrically arranged centering rods 14 are installed through the base 1, and the centering rods 14 are slidably installed on the base 1. The outer surface of the centering rods 14 is provided with a scale strip 15. The symmetrically arranged centering rods 14 can be inserted into the positioning hole of the stator sleeve. With the help of the scale strip 15, the operator can calibrate the central axis of the tool and the pin 11, so as to ensure the coaxiality of the tapping tap 9 and the pin hole 12 and improve the tapping accuracy.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A tool for removing pins from a turbine stator bushing, characterized in that, The device includes a base (1), a support fixing cylinder (2) is fixedly installed on the top of the base (1), a movable hole (3) is opened on the inner surface of the support fixing cylinder (2), an elastic telescopic component (4) is installed on the top of the support fixing cylinder (2), a shaft seat (5) is fixedly installed on the upper end of the elastic telescopic component (4), a rotating rod (6) is installed on the inner surface of the shaft seat (5), and a tap (9) is fixedly installed through the movable hole (3) at the lower end of the rotating rod (6), a horizontally arranged rotating arm (7) is fixedly installed on the upper end of the rotating rod (6), the lower surface of the base (1) is set on a stator sleeve (10), a pin (11) is set on the stator sleeve (10), an opening (12) is opened on the upper surface of the pin (11), and the tap (9) is set in the opening (12).

2. The tool for removing pins from the turbine stator sleeve according to claim 1, characterized in that: The elastic telescopic component (4) includes a sleeve (41) and a movable rod (42) that are movably connected to each other. The sleeve (41) has a movable cavity (44) and a spring (43) is installed in the movable cavity (44). The sleeve (41) and the movable rod (42) are connected by the spring (43).

3. The tool for removing pins from the turbine stator sleeve according to claim 1, characterized in that: The elastic telescopic component (4) is provided in a plurality of units, and the plurality of elastic telescopic components (4) are arranged in a ring on the bearing seat (5).

4. The tool for removing pins from the turbine stator sleeve according to claim 1, characterized in that: The bearing seat (5) includes an outer bushing and an inner bushing. The elastic telescopic member (4) is fixedly connected to the outer bushing. The outer bushing and the inner bushing are rotatably connected. The outer surface of the rotating rod (6) is fixedly connected to the inner bushing.

5. The tool for removing pins from the turbine stator sleeve according to claim 1, characterized in that: The rotating rod (6) and the tapping tap (9) are fixedly connected by a fixed mounting sleeve (8).

6. The tool for removing pins from the turbine stator sleeve according to claim 1, characterized in that: The base (1) has a magnetic seat (13) at its bottom, and the magnetic seat (13) has a magnetic plate at its bottom.

7. The tool for removing pins from the turbine stator sleeve according to claim 1, characterized in that: Two symmetrically arranged centering rods (14) are installed through the base (1), and the centering rods (14) are slidably installed on the base (1). The outer surface of the centering rods (14) is provided with scale strips (15).

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