A water turbine crank puller

Abstract

The utility model is suitable for water turbine bent arm pulling-out tool technical field provides a water turbine bent arm pulling-out tool, include: top cover, fixed connection in the handle of top cover one side, install the hand hydraulic jack of top cover top surface one side, pull out the steel sheet of clasp connection in the hand hydraulic jack output end, the mounting assembly of assembly between hand hydraulic jack and pull out the steel sheet, the mounting assembly is used for to hand hydraulic jack and the quick disassembly of pull out the steel sheet. The water turbine bent arm pulling-out tool provided by the scheme uses the new type of special tool of disassembly bent arm, with the help of the strong power of hydraulic jack, can quickly and effectively pull out the bent arm, solves the problem of the insufficient pulling-out force of traditional puller type tool, cooperates simple and convenient mounting assembly, realizes the quick disassembly of hand hydraulic jack and pull out the steel sheet, facilitates equipment movement and maintenance, significantly improves the maintenance efficiency.

Description

Technical Field

[0001] This utility model belongs to the technical field of turbine crank arm removal tools, and particularly relates to a turbine crank arm removal tool. Background Technology

[0002] The turbine of Unit 1 at the Longshou First-Stage Hydropower Station is model HL(L2561267)-LJ-183. The turbine has 24 guide vanes, each equipped with a friction device. The turbine-generator unit was connected to the grid on May 30, 2001. The manufacturer is Hangzhou Kwana Power Equipment Co., Ltd. On November 1, 2024, Unit 1 underwent its fifth Class A overhaul. Due to defects in the turbine's guide vane friction device, the movable guide vanes and runner needed to be returned to the factory for repair welding, necessitating a disassembly and inspection of the turbine.

[0003] However, the existing crank arm removal tool is insufficient to remove the crank arm of the turbine guide vane mechanism due to severe corrosion at the mating surface between the crank arm and the movable guide vane shaft diameter, and the tight fit between the crank arm and the movable guide vane shaft diameter. Therefore, a new crank arm removal tool was designed and manufactured to remove the crank arm quickly and efficiently. Summary of the Invention

[0004] This utility model provides a tool for removing the crank arm of a water turbine. It aims to solve the problem that the existing tool for removing the crank arm of a water turbine guide vane mechanism is unable to remove the crank arm due to severe corrosion at the mating surface between the crank arm and the shaft diameter of the movable guide vane, and because the fit between the crank arm and the shaft diameter of the movable guide vane is tight. Therefore, a new crank arm removal tool is designed and manufactured to quickly and efficiently remove the crank arm.

[0005] This utility model is implemented as follows: a tool for pulling out the crank arm of a water turbine includes: a top cover; a hand-cranked hydraulic jack installed on one side of the top surface of the top cover; a pull-out steel plate that is engaged with the output end of the hand-cranked hydraulic jack; and an installation assembly assembled between the hand-cranked hydraulic jack and the pull-out steel plate, wherein the installation assembly is used for quick disassembly of the hand-cranked hydraulic jack and the pull-out steel plate.

[0006] Preferably, the mounting assembly includes: a mating plate fixedly connected to the top of the hand-cranked hydraulic jack, the mating side of the mating plate having a first sliding groove, the two sides of the first sliding groove having second sliding grooves, the other side of the second sliding groove having an installation groove, the inside of the installation groove being connected to a spring, the other side of the spring being connected to a circular slider, the other side of the circular slider being connected to a limit block; and a locking head fixedly connected to the mating side of the pull-out steel plate.

[0007] Preferably, the locking head and the first sliding groove are provided in six sets, and each set is distributed at an equal angle on the pull-out steel plate and the hand-cranked hydraulic jack, with each set being aligned with the other.

[0008] Preferably, the end of the engaging head is hexagonal, the end of the limiting block is conical and fits into the first groove, and the end of the limiting block forms a sliding engaging structure with the end sidewall of the engaging head through a spring and a circular slider.

[0009] Preferably, the main body of the circular slider is fitted into the mounting groove, and a sliding structure is formed between the slider and the mounting groove by a spring.

[0010] Preferably, the inner diameter of the circular slider is larger than the radial diameter of the limiting block, the main body of the limiting block is fitted into the second slide groove, and the limiting block and the second slide groove form a mutual sliding structure through the spring and the circular slider.

[0011] Preferably, the hand-cranked hydraulic jacks are provided in two sets, and the two sets of hand-cranked hydraulic jacks are symmetrically distributed along the steel plate being pulled out.

[0012] Compared with related technologies, the turbine crank arm extraction tool provided by this utility model has the following advantages: The new special tool for removing crank arms can effectively use the power of hydraulic jacks to quickly pull out the crank arms, solving the problem of insufficient pulling force in the original crank arm removal tool which uses a puller. At the same time, with simple installation components, the disassembly of the hand-cranked hydraulic jack and the steel plate can be completed quickly, which facilitates the movement of the hand-cranked hydraulic jack and the steel plate and improves maintenance efficiency. In terms of economic benefits: The original crank arm disassembly and assembly tool required three bolts for connection, and disassembly relied entirely on manual wrench operation, which was time-consuming and labor-intensive. The new crank arm removal tool effectively shortened the removal time by three days, saving 12 workers per day (based on four workers per day) and approximately 3600 yuan in costs. Assuming the unit operates at full capacity for eight hours per day during winter, with an average grid electricity price of approximately 0.3 yuan per kilowatt-hour, the economic benefit is approximately 108,000 yuan. The cost of the new crank arm removal tool is approximately 350 yuan. Attached Figure Description

[0013] Figure 1 This is a side view of the appearance structure of this utility model; Figure 2 This is a cross-sectional exploded side view of some parts of the installation component of this utility model; Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 This is a side view of the structure of the present invention in actual use; Reference numerals: 1. Top cover; 2. Hand-cranked hydraulic jack; 3. Steel plate pullout; 4. Installation component; 401. Fitting plate; 402. Clamping head; 403. First slide groove; 404. Second slide groove; 405. Installation groove; 406. Spring; 407. Circular slider; 408. Limit block. Detailed Implementation

[0014] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0015] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0016] This utility model embodiment provides a tool for pulling out the crank arm of a water turbine, such as... Figure 1-4 As shown, the turbine crank arm removal tool includes: a top cover 1; a hand-cranked hydraulic jack 2 installed on one side of the top surface of the top cover 1; a pull-out steel plate 3 that is engaged with the output end of the hand-cranked hydraulic jack 2; and an installation assembly 4 assembled between the hand-cranked hydraulic jack 2 and the pull-out steel plate 3. The installation assembly 4 is used for quick disassembly of the hand-cranked hydraulic jack 2 and the pull-out steel plate 3.

[0017] In this embodiment, the movable guide vane end cap and pin are first removed. Then, a 30mm thick steel plate 3 is machined to form a new type of crank arm removal tool. The machined crank arm removal tool is then installed on the crank arm, ensuring that the center of the tool and the center of the crank arm are aligned. A pair of hand-cranked hydraulic jacks 2 are placed on the top cover 1, and the crank arm removal tool is symmetrically and evenly lifted to ensure even force distribution on the crank arm. Then, two people simultaneously crank the hydraulic jacks to slowly pull out the crank arm, ensuring the tool remains level. If the tool tilts, it should be adjusted promptly until it is level. After removal, the tool is pulled out... The steel plate 3 is pulled out, causing the end of the locking head 402 to slide against the limiting block 408. Under the action of the spring 406 and the circular slider 407, the limiting block 408 is pressed into the second sliding groove 404 and forms a sliding locking structure with the side wall of the locking head 402, thereby ensuring quick disassembly and unlocking the locking structure. This allows for quick disassembly of the hand-cranked hydraulic jack 2 and the steel plate 3, enabling convenient replacement and maintenance. Finally, it should be noted that the hand-cranked hydraulic jack 2 is only used for pulling out the steel plate. When used for other work, the installation component 4 will cause the hand-cranked hydraulic jack 2 to quickly separate from the steel plate 3, rendering it unusable.

[0018] In a further preferred embodiment of this utility model, the mounting component 4 includes: a mating plate 401 fixedly connected to the top of the hand-cranked hydraulic jack 2, a first sliding groove 403 provided on the mating side of the mating plate 401, a second sliding groove 404 provided on both sides of the first sliding groove 403, an installation groove 405 provided on the other side of the second sliding groove 404, a spring 406 connected inside the installation groove 405, a circular slider 407 connected to the other side of the spring 406, and a limit block 408 connected to the other side of the circular slider 407; and a locking head 402 fixedly connected to the mating side of the pull-out steel plate 3.

[0019] In this embodiment, the installation component 4 is used to realize the quick connection and disassembly between the hand-cranked hydraulic jack 2 and the pull-out steel plate 3. The locking head 402 is inserted into the first slide groove 403 on the fitting plate 401, and the limiting block 408 slides into the groove under the action of the spring 406 and the circular slider 407 to form a reliable limit. The limiting block 408 is fitted in the second slide groove 404. By locking its pointed end to cooperate with the side wall of the locking head 402, a stable lock is achieved. When disassembly is required, the pull-out steel plate 3 is pulled forcefully, so that the limiting block 408 overcomes the elastic force of the spring 406 and disengages from the locking state, thereby quickly releasing the pull-out steel plate 3.

[0020] In a further preferred embodiment of this utility model, the locking head 402 and the first sliding groove 403 are each provided with six sets, and each set is distributed at an equal angle on the pull-out steel plate 3 and the hand-cranked hydraulic jack 2, with their positions aligned one-to-one.

[0021] In this embodiment, the first groove 403 is used to engage the locking head 402, providing an initial positioning channel to achieve precise docking and stable connection between the pull-out steel plate 3 and the locking plate 401.

[0022] In a further preferred embodiment of the present invention, the end of the engaging head 402 is hexagonal, the end of the limiting block 408 is conical, and it is fitted into the first sliding groove 403. The end of the limiting block 408 forms a sliding engagement structure with the end sidewall of the engaging head 402 through the spring 406 and the circular slider 407.

[0023] In this embodiment, the locking head 402 is used to insert into the first sliding groove 403 to achieve initial connection. The limiting block 408 is embedded in the side wall of the locking head 402 under the elastic force of the spring 406 to achieve sliding limit and locking, and prevent loosening.

[0024] In a further preferred embodiment of the present invention, the main body of the circular slider 407 is fitted into the mounting groove 405, and a mutual sliding structure is formed between the spring 406 and the mounting groove 405.

[0025] In this embodiment, the circular slider 407 is fitted into the mounting groove 405 and connected to the limiting block 408 by the spring 406, which plays a role in buffering, resetting and stabilizing the guide. The mounting groove 405 provides a sliding channel to achieve structural coordination.

[0026] In a further preferred embodiment of the present invention, the inner diameter of the circular slider 407 is larger than the radial diameter of the limiting block 408. The main body of the limiting block 408 is fitted into the second slide groove 404, and the spring 406 and the circular slider 407 form a mutual sliding structure with the second slide groove 404.

[0027] In this embodiment, the second slide 404 provides a sliding channel for the limiting block 408, allowing it to move precisely and engage under the action of the spring 406 and the circular slider 407, thereby achieving the limiting and locking functions of pulling out the steel plate 3.

[0028] In a further preferred embodiment of this utility model, two sets of hand-cranked hydraulic jacks 2 are provided, and the two sets of hand-cranked hydraulic jacks 2 are symmetrically distributed along the steel plate 3.

[0029] In this embodiment, a hand-cranked hydraulic jack 2 serves as the power source and is installed on the top cover 1. By cranking, it enables the lifting operation of the steel plate 3, providing a stable mechanical force output to realize the pulling function of the device.

[0030] In summary, the device uses a hand-cranked hydraulic jack 2 to drive the steel plate 3 out for extraction. The various structures in the mounting assembly 4 work together to achieve rapid engagement and limiting, ensuring a stable and reliable connection. At the same time, it facilitates quick disassembly and replacement, improving operational efficiency and safety.

[0031] It is worth noting that the circuits, electronic components, and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0032] It should be understood that the disclosed apparatus can be implemented in other ways, given the several embodiments provided in this application. For example, the apparatus embodiments described above are merely illustrative; the division of units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or communication connections shown or discussed may be through some interfaces; the indirect coupling or communication connections between devices or units may be telecommunications or other forms.

[0033] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of this utility model according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of this utility model. These technical solutions are also within the scope of protection of this utility model.

Claims

1. A tool for pulling out the crank arm of a water turbine, characterized in that, include: Top cover (1); A hand-cranked hydraulic jack (2) is installed on one side of the top surface of the top cover (1); The pull-out steel plate (3) is engaged with the output end of the hand-cranked hydraulic jack (2); An installation assembly (4) is assembled between the hand-cranked hydraulic jack (2) and the pull-out steel plate (3), the installation assembly (4) being used for quick disassembly of the hand-cranked hydraulic jack (2) and the pull-out steel plate (3); The installation component (4) includes: A fitting plate (401) is fixedly connected to the top of the hand-cranked hydraulic jack (2). A first sliding groove (403) is provided on the fitting side of the fitting plate (401). A second sliding groove (404) is provided on both sides of the first sliding groove (403). An installation groove (405) is provided on the other side of the second sliding groove (404). A spring (406) is connected inside the installation groove (405). A circular slider (407) is connected to the other side of the spring (406). A limit block (408) is connected to the other side of the circular slider (407). The locking head (402) is fixedly connected to the mating side of the pull-out steel plate (3).

2. The turbine crank arm extraction tool as described in claim 1, characterized in that, The locking head (402) and the first slide groove (403) are each provided with six sets, and each set is distributed at an equal angle on the pull-out steel plate (3) and the hand-cranked hydraulic jack (2), and the positions are aligned one to one.

3. The turbine crank arm extraction tool as described in claim 1, characterized in that, The end of the engaging head (402) is hexagonal, and the end of the limiting block (408) is conical and fitted into the first groove (403). The end of the limiting block (408) forms a sliding engaging structure with the end sidewall of the engaging head (402) through a spring (406) and a circular slider (407).

4. The turbine crank arm extraction tool as described in claim 1, characterized in that, The main body of the circular slider (407) is fitted into the mounting groove (405), and a sliding structure is formed between the slider and the mounting groove (405) by means of a spring (406).

5. The turbine crank arm extraction tool as described in claim 1, characterized in that, The inner diameter of the circular slider (407) is larger than the radial dimension of the limiting block (408). The main body of the limiting block (408) is fitted into the second slide groove (404), and forms a mutual sliding structure with the second slide groove (404) through the spring (406) and the circular slider (407).

6. The turbine crank arm extraction tool as described in claim 1, characterized in that, The hand-cranked hydraulic jacks (2) are provided in two sets, and the two sets of hand-cranked hydraulic jacks (2) are symmetrically distributed along the steel plate (3).

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