A water guide mechanism shear pin disassembly device

Abstract

The utility model discloses a kind of water guide mechanism shear pin dismounting devices, for dismounting and installing shear pin on water guide mechanism, the shear pin top is equipped with pin cap, the shear pin top is provided with support frame, the dismounting device further includes top plate, the top plate with the support frame is detachably connected, dismounting assembly is provided on the top plate, the utility model device is through specific structure design, can be quickly with shear pin centering and ensure ejection process level, avoid deflection jam, make dismounting smooth and labor-saving, greatly improve efficiency;Its uniform and stable axial force mode, effectively avoid the scratch and pull of shear pin and pin hole inner wall, protect equipment precision;Device integrates dismounting and hoisting function, is equipped with lifting point, can be directly used as lifting appliance after dismounting, safely transfer shear pin, reduce tool replacement, eliminate safety risk, realize seamless connection and essential safety promotion of process.

Description

Technical Field

[0001] This utility model relates to the field of water turbine installation technology, and in particular to a device for dismantling the shear pin of a water guide mechanism. Background Technology

[0002] The water guide mechanism of a water turbine is a key component for controlling water flow and regulating the output of the unit. The shear pin is an important safety element in the connection of the water guide mechanism. When foreign objects are stuck between the guide vanes, they will be sheared off, thus protecting other important components from damage. During the operation or maintenance of the unit, the shear pin that has been sheared off or needs to be replaced needs to be removed from the mating hole. Currently, the most common disassembly method on-site is to directly push the shear pin with a jack. However, this method has many drawbacks: First, since the alignment of the jack and the shear pin relies entirely on manual adjustment, it is difficult to ensure the levelness during the pushing process, and jamming is very likely to occur, making the disassembly operation extremely difficult and inefficient. Second, the shear pin and the pin hole have a tight transition fit or interference fit with very small clearance. Direct pushing can easily cause uneven force, resulting in scratches on the surface of the shear pin and the pin hole, damaging the mating surfaces of the equipment and affecting the operational accuracy and reliability of the equipment after repair. Finally, traditional disassembly methods are limited in function. After the shear pin is pushed out, other tools (such as wire ropes and slings) are still needed for transportation, which is cumbersome and poses a risk of falling objects from heights. Therefore, there is an urgent need for a shear pin disassembly device that can achieve rapid, non-destructive, and multifunctional integrated operation to solve the above technical problems. Utility Model Content

[0003] This utility model patent aims to address the shortcomings of the prior art by providing a device for dismantling the shear pin of a water guiding mechanism, which solves the technical problem of low dismantling efficiency and easy damage to equipment in the prior art.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a shear pin disassembly device for a water guiding mechanism, used to disassemble and install shear pins on a water guiding mechanism, wherein the top of the shear pin is provided with a pin cap and a support frame is provided on the top of the shear pin, the disassembly device further includes a top plate, the top plate is detachably connected to the support frame, and the top plate is provided with disassembly components.

[0005] Preferably, the support frame includes two sets of support rods disposed on the top of the pin cap, and a retaining plate is fixedly connected to the top of the support rods.

[0006] Preferably, the top plate is circular, and two slots are provided on the top plate to cooperate with the support rod.

[0007] Preferably, the disassembly assembly includes a plurality of threaded through holes formed in the top plate, and a push bolt is provided through the threaded through holes.

[0008] Preferably, a handle is also provided at the top of the top plate.

[0009] Preferably, the support rod and the pin cap are integrally formed.

[0010] Preferably, the top plate is also provided with a lifting ring.

[0011] Preferably, a nut is embedded in the threaded through hole, and the push bolt is threadedly engaged with the nut.

[0012] Preferably, a gasket is also provided between the top plate and the card plate.

[0013] Preferably, the top plate is made of stainless steel.

[0014] The beneficial effects of this utility model are: This utility model device, through a specific structural design, can quickly align with the shear pin and ensure a horizontal ejection process, avoiding skewness and jamming, making disassembly smooth and labor-saving, and greatly improving efficiency. Its uniform and stable axial force application effectively avoids scratches and pulls on the shear pin and the inner wall of the pin hole, protecting the equipment precision. The device integrates disassembly and hoisting functions, is equipped with lifting points, and can be directly used as a hoisting tool after disassembly for safe transfer of the shear pin, reducing tool changes, eliminating safety risks, and achieving seamless process connection and inherent safety improvement. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a side view of the present invention; Figure 3 This is a top view of the present invention; Figure 4 This is a schematic diagram of the shear pin of this utility model; In the diagram: 1. Top plate; 2. Push bolt; 3. Handle; 4. Hole; 5. Threaded through hole; 6. Shear pin; 7. Pin cap; 8. Support rod; 9. Clamping plate. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] like Figure 1-3As shown, a shear pin disassembly device for a water guiding mechanism is used to disassemble a shear pin 6 installed on the water guiding mechanism. The shear pin 6 has a pin cap 7 on its top and a support frame on its top. The disassembly device also includes a top plate 1, which is detachably connected to the support frame. The top plate 1 is equipped with disassembly components. The core design of this device is to divide the entire disassembly system into two main parts: one is a support frame that is pre-installed or temporarily installed on the top of the shear pin 6 to be disassembled, which serves as the force transmission medium and the force point to be lifted. In this application, the shear pin preferably adopts a method where the support frame is pre-integratedly set on the top of the shear pin 6; the other is a top plate 1 that can be quickly installed and removed, which serves as an operating platform and a reaction force support mechanism. This split design solves the problem that traditional large tools such as jacks are difficult to install and align in the narrow space inside the water guiding mechanism. The top plate 1 is combined with the support frame through a detachable connection to form a stable and closed force transmission chain, ensuring that the lifting force is strictly along the axial direction of the shear pin 6, which is the basis for achieving non-destructive and efficient disassembly.

[0019] Preferably, the support frame includes two sets of support rods 8 located at the top of the pin cap 7, with a retaining plate 9 fixedly connected to the top of each support rod 8. In this embodiment, the support frame is specifically configured with two symmetrically arranged sets of support rods 8, which are vertically fixed to the pin cap 7. The top ends of the support rods 8 are fixed to a retaining plate 9 by welding or threaded connection, forming a stable "door" or "bridge" structure. The core function of the retaining plate 9 is to provide a reliable lower support surface for the subsequent top plate 1. This structure distributes the force originally acting on a point on the shearing pin cap 7 to the two symmetrical support rods 8, and transforms it into a planar, uniform lifting force through the retaining plate 9 at the top, greatly improving the stress state and effectively preventing jamming or component damage caused by uneven loading.

[0020] Preferably, the top plate 1 is circular, and two slots 4 are formed on the top plate 1 to mate with the support rod 8. In this embodiment, the top plate 1 is designed to be circular, which gives it better maneuverability and adaptability in confined spaces, eliminates directional requirements, and facilitates quick installation. The two slots 4 machined on the top plate 1 are precisely matched in shape and spacing to the support rod 8. During installation, the operator only needs to align the slots 4 with the support rod 8 and slide them horizontally to complete the precise connection between the top plate 1 and the support frame. This "slotted fitting" connection method not only achieves rapid assembly, but more importantly, it automatically ensures the perpendicular relationship between the top plate 1 and the axis of the shear pin 6, that is, it automatically completes the "alignment" process, avoiding lateral forces caused by poor tool alignment from the source.

[0021] Preferably, the disassembly assembly includes several threaded through holes 5 formed on the top plate 1, and a push bolt 2 is disposed through each threaded through hole 5; in this embodiment, the working principle of the disassembly assembly is similar to that of a "screw jack". The threaded through holes 5 serve as the fulcrum for applying force to the push bolt 2. When the push bolt 2 is tightened, its lower end abuts against the solid base surface of the water guiding mechanism. Since the bolt is blocked by the base surface and cannot move downward, according to the principle of reaction force, the reaction force generated will push the top plate 1, which is threaded with it, to move upward. The upwardly moving top plate 1 transmits the force to the support rod 8 through the side wall of its slot 4, and then the upward lifting force is finally applied to the pin cap 7 of the shear pin 6 through the clamping plate 9.

[0022] Preferably, a handle 3 is also provided on the top of the top plate 1; the handle 3 installed on the top of the top plate 1 improves the portability and ease of operation of the device. During the assembly and transportation of the device, the operator can easily hold it; when tightening the push bolt 2, the handle 3 can be used to help fix the top plate 1, preventing it from rotating with the bolt, ensuring that the pushing force is fully used to lift the shear pin, thereby improving work efficiency and operational stability.

[0023] Preferably, the support rod 8 and the pin cap 7 are integrally formed; in this embodiment, the support rod 8 and the pin cap 7 are manufactured using an integral forming process, which is a preferred implementation of this solution.

[0024] Preferably, a lifting ring is also provided on the top plate 1; in this embodiment, the lifting ring integrated on the top plate 1 gives the device the function of lifting after disassembly. After the shear pin 6 is completely pushed out, without changing tools, the shear pin 6 can be safely and smoothly transferred to the designated work position by directly connecting the steel wire rope or lifting belt through the lifting ring and using lifting equipment such as workshop cranes or electric hoists. This design realizes a seamless connection of the "disassembly-lifting" process, reduces the number of tool changes and the risk of personnel working at height, and improves the safety and efficiency of the overall maintenance operation.

[0025] Preferably, a nut 11 is embedded in the threaded through hole 5, and the push bolt 2 is threadedly engaged with the nut 11.

[0026] Preferably, a shim is further provided between the top plate 1 and the clamping plate 9; the shim between the top plate 1 and the clamping plate 9 is a practical fine-tuning mechanism. By using shims of different thicknesses, the initial height of the top plate 1 can be flexibly adjusted to adapt to shear pins 6 with different protruding lengths or different space conditions on site. In addition, the shim can also distribute pressure evenly and reduce wear on the contact surface.

[0027] Preferably, the top plate 1 is made of stainless steel.

[0028] The specific operating method of this application is as follows: When using this device, first ensure that the support frame (composed of support rods 8 and clamping plate 9) is securely installed on the pin cap 7 of the shear pin 6 to be disassembled. Then, holding the handle 3 on the top plate 1, align the two slots 4 on it with the two support rods 8 and slide it down, so that the top plate 1 rests stably on the clamping plate 9. Screw the push bolt 2 into the threaded through hole 5 (or the embedded nut 11) of the top plate 1 until its lower end lightly contacts the base surface of the water guiding mechanism. At this time, the operator can use the lever to insert into the through hole at the top of the push bolt 2 and begin to tighten the bolt. As the push bolt 2 is screwed in, its lower end abuts against the base surface as a fulcrum, pushing the top plate 1 upward. The top plate 1 then smoothly lifts the shear pin 6 upward through the support rods 8 and clamping plate 9 until it is completely pushed out of the mounting hole. Finally, using the lifting ring on the top plate 1, hoist the shear pin together with the device to a safe area to complete all operations.

[0029] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A device for disassembling a shear pin on a water guiding mechanism, used for disassembling and installing a shear pin (6) on a water guiding mechanism, wherein the shear pin (6) is provided with a pin cap (7) at its top, characterized in that, The top of the shear pin (6) is provided with a support frame, and the disassembly device also includes a top plate (1), which is detachably connected to the support frame, and a disassembly component is provided on the top plate (1).

2. The water guiding mechanism shear pin disassembly device according to claim 1, characterized in that, The support frame includes two sets of support rods (8) located on the top of the pin cap (7), and a card plate (9) is fixedly connected to the top of the support rods (8).

3. The water guiding mechanism shear pin disassembly device according to claim 2, characterized in that, The top plate (1) is circular, and two slots (4) are provided on the top plate (1) to cooperate with the support rod (8).

4. The water guiding mechanism shear pin disassembly device according to claim 1, characterized in that, The disassembly assembly includes several threaded through holes (5) opened on the top plate (1), and push bolts (2) are provided through the threaded through holes (5).

5. The water guiding mechanism shear pin disassembly device according to claim 4, characterized in that, The top of the top plate (1) is also provided with a handle (3).

6. The water guiding mechanism shear pin disassembly device according to claim 3, characterized in that, The support rod (8) and the pin cap (7) are integrally formed.

7. The water guiding mechanism shear pin disassembly device according to claim 1, characterized in that, The top plate (1) is also equipped with a lifting ring.

8. The water guiding mechanism shear pin disassembly device according to claim 4, characterized in that, The threaded through hole (5) is fitted with a nut, and the push bolt (2) is threadedly engaged with the nut.

9. The water guiding mechanism shear pin disassembly device according to claim 1, characterized in that, A gasket is also provided between the top plate (1) and the card plate (9).

10. A device for dismantling the shear pin of a water guiding mechanism according to claim 1, characterized in that, The top plate (1) is made of stainless steel.

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