Water turbine crank arm pulling device
By designing a turbine jaw pulling device including a casing, support frame, chuck, hinge interface, rotating arm and clamp, the problem of lack of effective support points during the jaw removal process is solved, and safe and efficient jaws are achieved Arm pulling improves safety and reduces maintenance costs.
Patent Information
- Application Number
- CN202421234345.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-02
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-06-02
AI Technical Summary
During the removal of the turbine jaw, the conventional extraction method lacks effective support points, which leads to cumbersome and time-consuming adjustment, which can easily cause jaw wear, increase maintenance costs and pose certain risks.
A turbine jaw pulling device is designed, including a casing, support frame, chuck, hinge interface, rotating arm and clamp. Through the cooperation of these components, a stable support point is provided and the jack effect is realized. Safely extract.
This device can effectively prevent damage caused by sudden component elasticity during extraction of the crooked arm, which improves safety, simplifies the support adjustment of the jack, and reduces maintenance costs and time.
Smart Images
Figure CN222429891U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of water turbines, in particular to a water turbine crank arm extraction device. Background Art
[0002] For hydroelectric generator sets, especially turbines, the crank arm is an important transmission mechanism for controlling the guide vanes. A transition fit is often used between the crank arm and the guide vane shaft, so there will be an interference gap during the fit process, with a gap of only 0.04mm. If water leaks from the sleeve into the gap between the crank arm and the guide vane, rust will make the guide vane and the crank arm adhere more tightly, resulting in greater resistance to disassembly, which will increase the difficulty of removing the crank arm.
[0003] At present, due to the long-term action of the operating torque of the movable guide vane switch, the crank arm and the guide vane shaft form a close fit, which makes it difficult to remove the crank arm using general maintenance tools. The conventional extraction method often uses a jack to punch it out, but to meet the jacking requirements, it is necessary to add multiple supports to the mechanical jack, and the maintenance space of the crank arm often lacks support points during the use of the jack. This makes the support adjustment of the jack cumbersome, time-consuming and labor-intensive, and easily causes the crank arm to be easily worn during the extraction process, thereby increasing the equipment maintenance cost and having a certain degree of danger.
[0004] Therefore, it is necessary to modify the conventional extraction device to effectively prevent the cumbersome, time-consuming and labor-intensive support adjustment of the jack, which can easily cause the crank arm to be easily worn during the extraction process, thereby increasing the equipment maintenance cost and posing certain risks. Utility Model Content
[0005] In order to solve the problems raised in the above-mentioned background technology, the purpose of the utility model is to provide a turbine crank arm extraction device, which is convenient for providing support for the jack and can prevent the crank arm from suddenly flying out and injuring maintenance personnel due to the elasticity of the components when being extracted, thereby improving the safety advantage, and solving the problem that the support adjustment of the jack is cumbersome, time-consuming and labor-intensive, and easily causes the crank arm to be easily worn during the extraction process, thereby increasing the equipment maintenance cost and having certain risks.
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a turbine crank arm extraction device comprises a casing, a connecting ring is fixedly connected to the top of the casing, a crank arm main body is arranged inside the connecting ring, a support frame is arranged on the top of the casing, and the support frame is located at the top of the crank arm main body, a lifting port is opened on one side of the support frame, and the lifting port is used in conjunction with the crank arm main body, a clamping port is opened at the bottom end of the support frame, and the clamping port is clamped with the connecting ring, a jack is fixedly connected to the top of the support frame, the output end of the jack passes through the support frame and is fixedly connected to a connecting piece, a chuck is fixedly connected to the bottom of the connecting piece, three hinge interfaces are opened on the surface of the chuck, and the three hinge interfaces are evenly arranged in a ring shape, the interior of the hinge interface is rotatably connected to a rotating arm through a high-strength rotating shaft, a clamping block is fixedly connected to the bottom of the rotating arm, and the clamping block is used in conjunction with the crank arm main body.
[0007] As a preferred embodiment of the utility model, three slide grooves are opened on the surface of the support frame, and the three slide grooves are evenly arranged in a ring shape, and the surfaces of the three rotating arms are fixedly connected with sliders, and the three sliders are in a one-to-one correspondence with the three slide grooves respectively.
[0008] As a preferred embodiment of the present invention, scale lines are provided on the surface of the support frame, and the scale lines are used in conjunction with the slider.
[0009] As a preferred embodiment of the present invention, a receiving opening is provided at the bottom of the chuck, and an inner wall of the receiving opening is engaged with the rotating shaft of the crank arm body.
[0010] As a preferred embodiment of the present invention, the bottom of the support frame is provided with anti-slip grooves.
[0011] As a preferred embodiment of the present invention, the cross-sectional area of the lifting opening width is greater than the cross-sectional area of the crank arm body width.
[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:
[0013] 1. The utility model can clamp the support frame to the connecting ring through the cooperation of the support frame and the clamping port, so as to provide a support point for the jack, and then use the cooperation of the chuck, the hinge port, the rotating arm and the clamping block to clamp the crank arm body into the chuck, and then use the jack to pull the chuck upwards, so as to achieve the effect of extracting the crank arm body, and can use the support frame to half-wrap the crank arm body to prevent the crank arm body from suddenly flying out and injuring the maintenance personnel due to the elasticity of the components when being extracted, thereby improving the safety of the extraction device when in use.
[0014] 2. The utility model can limit the movement of the chuck so that it can only be lifted vertically by setting the slide groove and the slider, and it is convenient for the staff to flip the rotating arm to clamp the crank arm body. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the structure of the utility model;
[0016] Figure 2 It is a three-dimensional schematic diagram of the structure of the utility model when the crank arm main body is extracted;
[0017] Figure 3 It is a three-dimensional schematic diagram of the cooperation of the chuck, hinge joint, rotating arm, clamping block and crank arm body of the utility model;
[0018] Figure 4 It is a three-dimensional schematic diagram of the cooperation of the housing, the connecting ring and the crank arm body of the utility model.
[0019] In the figure: 1. casing; 2. connecting ring; 3. crank arm body; 4. supporting frame; 5. lifting port; 6. clamping port; 7. jack; 8. connecting piece; 9. chuck; 10. hinge joint; 11. rotating arm; 12. clamping block; 13. slide groove; 14. slider; 15. scale line; 16. storage port; 17. anti-slip pattern. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0021] like Figures 1 to 4 As shown, the utility model provides a turbine crank arm extraction device, including a casing 1, a connecting ring 2 is fixedly connected to the top of the casing 1, a crank arm body 3 is arranged inside the connecting ring 2, a support frame 4 is arranged on the top of the casing 1, and the support frame 4 is located at the top of the crank arm body 3, a lifting port 5 is opened on one side of the support frame 4, and the lifting port 5 is used in conjunction with the crank arm body 3, a clamping port 6 is opened at the bottom end of the support frame 4, and the clamping port 6 is clamped with the connecting ring 2, a jack 7 is fixedly connected to the top of the support frame 4, and the jack 7 is a spring-reset hydraulic jack, the output end of the jack 7 passes through the support frame 4 and is fixedly connected to a connecting member 8, the bottom of the connecting member 8 is fixedly connected to a chuck 9, the surface of the chuck 9 is provided with three hinge ports 10, and the three hinge ports 10 are evenly arranged in a ring shape, the inside of the hinge port 10 is rotatably connected to a rotating arm 11 through a high-strength rotating shaft, the bottom of the rotating arm 11 is fixedly connected to a clamping block 12, and the clamping block 12 is used in conjunction with the crank arm body 3.
[0022] refer to Figure 1The support frame 4 has three slide grooves 13 on its surface, and the three slide grooves 13 are evenly arranged in a ring shape. The surfaces of the three rotating arms 11 are fixedly connected with sliders 14 , and the three sliders 14 are in a one-to-one correspondence with the three slide grooves 13 .
[0023] As a technical optimization solution of the utility model, through the setting of the slide groove 13 and the slider 14, on the one hand, the movement range of the chuck 9 can be limited so that it can only be lifted vertically, and on the other hand, it is convenient for the staff to flip the rotating arm 11 to clamp the crank arm body 3.
[0024] refer to Figure 2 The surface of the support frame 4 is provided with scale lines 15 , and the scale lines 15 are used in conjunction with the slider 14 .
[0025] As a technical optimization solution of the present invention, the setting of the scale line 15 facilitates the staff to control and adjust the extraction height of the crank arm body 3.
[0026] refer to Figure 1 and Figure 2 A receiving opening 16 is provided at the bottom of the chuck 9 , and the inner wall of the receiving opening 16 is engaged with the rotating shaft of the crank arm body 3 .
[0027] As a technical optimization solution of the present invention, the receiving opening 16 is provided to receive the rotating shaft of the crank arm body 3, thereby avoiding the effect of hard contact between the crank arm body 3 and the chuck 9, which would cause wear thereof.
[0028] refer to Figure 1 The bottom of the support frame 4 is provided with anti-slip grooves 17.
[0029] As a technical optimization solution of the present invention, the anti-slip pattern 17 is provided to improve the friction force at the bottom of the support frame 4, thereby enabling the clamping to be more stable.
[0030] refer to Figure 2 The cross-sectional area of the width of the lifting opening 5 is greater than the cross-sectional area of the width of the crank arm body 3.
[0031] As a technical optimization solution of the utility model, by setting the cross-sectional area of the width of the lifting opening 5 to be larger than the cross-sectional area of the width of the crank arm body 3, it can ensure that the crank arm body 3 can be lifted and lowered inside the support frame 4.
[0032] Working principle and use process of the utility model: when the staff uses the extraction device to dismantle the crank arm of the turbine, firstly, the clamping port 6 on the support frame 4 is clamped with the connecting ring 2 on the casing 1, and then the output end of the jack 7 is lowered to make the chuck 9 fall down to fit with the top of the crank arm body 3. At this time, the rotating shaft of the crank arm body 3 is received in the receiving port 16, and then the rotating arm 11 is rotated by toggling the slider 14 to drive the clamping block 12 to clamp to the bottom of the crank arm body 3, so that the crank arm body 3 can be clamped, and then the jack 7 is started. The chuck 9 is driven up to drive the chuck 9 to rise, so that the crank arm body 3 can be extracted. At this time, the slider 14 slides in the slide groove 13, thereby limiting the movement stroke of the chuck 9, so that it can only be lifted vertically, and the extraction height of the crank arm body 3 can be adjusted by observing the scale line 15. During the whole extraction process, the support frame 4 half-wraps the crank arm body 3 and limits the movement trajectory of the crank arm body 3 to prevent the crank arm body 3 from suddenly flying out and injuring the maintenance personnel due to the elasticity of the components when being extracted, thereby improving the safety of the extraction device when in use.
[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A turbine crank arm extraction device, comprising a housing (1), characterized in that: The top of the housing (1) is fixedly connected to a connecting ring (2), a crank arm body (3) is arranged inside the connecting ring (2), a support frame (4) is arranged on the top of the housing (1), and the support frame (4) is located on the top of the crank arm body (3), a lifting opening (5) is provided on one side of the support frame (4), and the lifting opening (5) is used in conjunction with the crank arm body (3), a clamping opening (6) is provided at the bottom end of the support frame (4), and the clamping opening (6) is clamped with the connecting ring (2), and the top of the support frame (4) is fixedly connected to A jack (7) is provided, wherein the output end of the jack (7) passes through a support frame (4) and is fixedly connected to a connecting piece (8), the bottom of the connecting piece (8) is fixedly connected to a chuck (9), the surface of the chuck (9) is provided with three hinge ports (10), and the three hinge ports (10) are evenly arranged in a ring shape, the interior of the hinge port (10) is rotatably connected to a rotating arm (11) via a high-strength rotating shaft, the bottom of the rotating arm (11) is fixedly connected to a clamping block (12), and the clamping block (12) is used in conjunction with a crank arm body (3).
2. A turbine crank arm extraction device according to claim 1, characterized in that: The support frame (4) is provided with three slide grooves (13) on its surface, and the three slide grooves (13) are evenly arranged in a ring shape. The surfaces of the three rotating arms (11) are all fixedly connected with sliders (14), and the three sliders (14) are in a one-to-one correspondence with the three slide grooves (13).
3. A turbine crank arm extraction device according to claim 2, characterized in that: The surface of the support frame (4) is provided with scale lines (15), and the scale lines (15) are used in conjunction with the slider (14).
4. A turbine crank arm extraction device according to claim 1, characterized in that: The bottom of the chuck (9) is provided with a receiving opening (16), and the inner wall of the receiving opening (16) is engaged with the rotating shaft of the crank arm body (3).
5. The hydraulic turbine crank arm extraction device according to claim 1, characterized in that: The bottom of the support frame (4) is provided with anti-slip grooves (17).
6. A turbine crank arm extraction device according to claim 1, characterized in that: The cross-sectional area of the width of the lifting opening (5) is greater than the cross-sectional area of the width of the crank arm body (3).