Convenient disassembling tool for shear pin of water turbine

Abstract

The utility model relates to the technical field of water turbine shear pins, and discloses a convenient water turbine shear pin dismounting tool which comprises a guide vane arm and a square hollow block which are connected through a cylinder, the guide vane arm is fixedly installed on the outer circumferential face of the cylinder, and a shear pin is rotatably installed in the middle hollow part of the guide vane arm. The upper half part of the shear pin is rotatably provided with a crank arm, the upper surface of the crank arm is slidably provided with an upper support, and the upper support, the bolt, the lower support and other parts are arranged, so that a steel pipe of the upper support is clamped into the upper part of the shear pin, and the steel pipe of the upper support is clamped by the protruded part of the shear pin to prevent movement; during disassembly, two wrenches are used, one wrench fixes the upper portion of the bolt, the other wrench rotates the nut, and the shear pin is pulled out.

Description

Technical Field

[0001] The utility model relates to the technical field of turbine shear pins, in particular to a convenient disassembly tool for turbine shear pins. Background Art

[0002] A shear pin, also called a breaking pin, is a key pin that can be sheared when the torque exceeds a certain value in mechanical transmission. It is the most commonly used safety device for the guide vane mechanism. A dangerous section is machined on the shear pin. Under the action of normal operating force, the shear pin can work normally. When the force exceeds 1.5 times the normal operating force, the shear pin together with the signal device installed therein breaks at the dangerous section and emits a signal, playing a role in protecting other guide vanes.

[0003] When the shear pin needs to be disassembled (for inspection, replacement or flaw detection), tools such as a jack are generally used. Due to the relatively narrow space and the presence of holes beside, the operation efficiency is not high and there is a certain degree of danger. Therefore, a convenient disassembly tool for turbine shear pins is designed. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a convenient disassembly tool for turbine shear pins, which has the advantages of simple structure, convenient operation, simplified working process, shortened operation time, being beneficial to improving the quality and precision of work; reducing the risks in work, protecting the personal safety of users and preventing the occurrence of construction accidents; being simple to operate and easy to master, without the need for complex training skills; the tool is strong and durable, can withstand long-term use and harsh working environments, reducing the frequency of maintenance and replacement, thereby reducing costs; being energy-saving and environment-friendly, without the need for tools such as jacks, having little impact on the environment and wide adaptability. The tool can be applied to various shear pins, etc. It solves the problem that when the shear pin needs to be disassembled (for inspection, replacement or flaw detection), tools such as a jack are generally used. Due to the relatively narrow space and the presence of holes beside, the operation efficiency is not high and there is a certain degree of danger, and a convenient disassembly tool for turbine shear pins is designed.

[0005] To achieve the above object, the utility model provides the following technical solution: A convenient disassembly tool for turbine shear pins includes a guide vane arm and a square hollow block connected by a cylinder. The outer circumferential surface of the cylinder is fixedly installed with the guide vane arm. A shear pin is rotatably installed in the middle hollow part of the guide vane arm. An elbow arm is rotatably installed on the upper half part of the shear pin. An upper support is slidably installed on the upper surface of the elbow arm. A first straight rod is fixedly installed on the outer circumferential surface of the upper support. A bolt is slidably installed in the hollow part of the shear pin. A nut is slidably installed on a part of the bolt near the upper end.

[0006] A lower support is installed on a part of the bolt near the lower end. A boss is installed on the upper surface of the lower support. An extension rod is slidably installed on the lower surface of the lower support.

[0007] Preferably, a washer is slidably installed on a portion of the bolt near the upper end, and an upper support is slidably installed on the lower surface of the washer.

[0008] Preferably, a first straight rod is fixedly installed on the outer circumferential surface of the upper support, and a first cylindrical rod is fixedly installed on the lower surface of the first straight rod.

[0009] Preferably, an extension rod is slidably installed on the lower surface of the lower support, a semi-circular fixing plate is fixedly installed on the upper surface of the extension rod, and the lower support is slidably installed on the inner side surface of the semi-circular fixing plate.

[0010] Preferably, a second straight rod is fixedly installed at the left end of the extension rod, a second cylindrical rod is fixedly installed on the upper right surface of the second straight rod, and a circular stopper is fixedly installed at the upper end of the second cylindrical rod.

[0011] Preferably, a first cylindrical rod is fixedly installed on the lower surface of the first straight rod, a hand rod is fixedly installed on the lower surface of the first cylindrical rod, a spring is fixedly installed on the lower right surface of the hand rod, and a second straight rod is fixedly installed at the lower end of the spring.

[0012] Preferably, a guide vane arm is slidably installed on the lower surface of the crank arm.

[0013] Compared with the prior art, the present utility model provides a convenient disassembly tool for the shear pin of a water turbine, and has the following beneficial effects:

[0014] 1. For this convenient disassembly tool for the shear pin of a water turbine, by arranging components such as the upper support, bolt, and lower support, the steel pipe of the upper support is clamped into the upper part of the shear pin, and the protruding part of the shear pin is used to clamp the steel pipe of the upper support to prevent movement. The nut and washer on the bolt are screwed to the upper part of the bolt, the bolt passes through the center of the shear pin, and the lower support is tightened at the lower part of the bolt. When disassembling, two wrenches are used. One wrench fixes the upper part of the bolt, and the other wrench rotates the nut to pull out the shear pin.

[0015] 2. For this convenient disassembly tool for the shear pin of a water turbine, by arranging components such as the second straight rod, extension rod, and hand rod, the semi-circular fixing plate on the second straight rod is used to stably place the lower support, the extension rod is used to provide a supporting force for the lower support, and the hand rod is used to pull the second straight rod upward to drive the lower support close to the bolt and then rotate and fix it, solving the problems that it may be inconvenient to manually hold the lower support and it is inconvenient to rotate and fix it on the bolt. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional structure schematic diagram of the whole of the present utility model;

[0017] Figure 2This is a schematic structural diagram between the second straight rod and the lower support of the whole utility model;

[0018] Figure 3 This is a schematic structural diagram between the crank arm and the guide vane arm of the whole utility model;

[0019] Figure 4 This is a schematic structural diagram between the bolt and the lower support of the whole utility model.

[0020] In the figure: 1, square hollow block; 2, lower support; 3, extension rod; 4, guide vane arm; 5, crank arm; 6, upper support; 7, nut; 8, bolt; 9, washer; 10, first cylindrical rod; 11, first straight rod; 12, circular stop block; 13, hand rod; 14, second cylindrical rod; 15, second straight rod; 16, spring; 17, shear pin; 18, semi-circular fixing plate; 19, cylinder; 20, convex platform. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] The following is a further detailed description of this application in conjunction with the attached Figures 1-4 This application further elaborates on the above.

[0023] The embodiments of this application disclose a convenient disassembling tool for the shear pin of a water turbine, as Figure 1 , which includes a guide vane arm 4 and a square hollow block 1 connected by a cylinder 19. The guide vane arm 4 is fixedly installed on the outer circumferential surface of the cylinder 19. A shear pin 17 is rotatably installed in the middle hollow part of the guide vane arm 4. The upper half of the shear pin 17 is rotatably installed with a crank arm 5. The lower surface of the crank arm 5 is slidably installed with the guide vane arm 4. The upper surface of the crank arm 5 is slidably installed with an upper support 6. The outer circumferential surface of the upper support 6 is fixedly installed with a first straight rod 11. The lower surface of the first straight rod 11 is fixedly installed with a first cylindrical rod 10. The shear pin 17 together with the signal device installed therein breaks at the dangerous section and emits a signal, playing a role in protecting other guide vanes. To prevent the shear pin 17 from protruding, the assembly of the shear pin 17 with the guide vane arm 4 and the crank arm 5 is relatively tight. The first straight rod 11 is used to fix and drive the upper support 6 to move a certain distance, which also provides more convenient space for rotating the nut 7, reduces the working time, and improves the efficiency.

[0024] Please refer to Figure 1, a first straight rod 11 is fixedly installed on the outer circumferential surface of the upper support 6. A first cylindrical rod 10 is fixedly installed on the lower surface of the first straight rod 11. A hand rod 13 is fixedly installed on the lower surface of the first cylindrical rod 10. A spring 16 is fixedly installed on the lower right surface of the hand rod 13. One end of the lower surface of the spring 16 is fixedly installed with a second straight rod 15. Through the first straight rod 11, a supporting force can be provided to pull the hand rod 13. One end of the left side of the second straight rod 15 is vertically aligned with the position of the upper support 6, which is convenient for fixing the positions of the bolt 8 and the lower support 2 more quickly when removing the shear pin 17.

[0025] Please refer to Figure 2 , a bolt 8 is slidably installed in the hollow part of the shear pin 17. A nut 7 is slidably installed on a part of the upper end of the bolt 8. A washer 9 is slidably installed on a part of the upper end of the bolt 8. The upper support 6 is slidably installed on the lower surface of the washer 9. A first straight rod 11 is fixedly installed on the outer circumferential surface of the upper support 6. A first cylindrical rod 10 is fixedly installed on the lower surface of the first straight rod 11. The first cylindrical rod 10 below the first straight rod 11 is used to set the movement trajectory of the hand rod 13 to prevent the hand rod 13 from shifting during pulling, resulting in the lower support 2 below being unable to align with the bolt 8 and affecting the work process.

[0026] Please refer to Figure 3 , an extension rod 3 is slidably installed on the lower surface of the lower support 2. A second straight rod 15 is fixedly installed on the left end of the extension rod 3. A second cylindrical rod 14 is fixedly installed on the upper right surface of the second straight rod 15. A circular stopper 12 is fixedly installed on the upper end of the second cylindrical rod 14. The circular stopper 12 is used to prevent the hand rod 13 from being lifted too much, resulting in the lower support 2 on the extension rod 3 colliding with the upper support 6, causing the lower support 2 to fall off and possibly get lost, affecting the work process.

[0027] Please refer to Figure 4 , a lower support 2 is installed on a part of the lower end of the bolt 8. A boss 20 is installed on the upper surface of the lower support 2. An extension rod 3 is slidably installed on the lower surface of the lower support 2. A semi-circular fixing plate 18 is fixedly installed on the upper surface of the extension rod 3. The lower support 2 is slidably installed on the inner side surface of the semi-circular fixing plate 18. The boss 20 on the upper surface of the lower support 2 can be placed into the inner hole of the shear pin 17 and can be fixed during pulling to prevent slipping. And the semi-circular fixing plate 18 is used to stabilize the lower support 2. After aligning with the bolt 8, it can be rotated and fixed without affecting the process.

[0028] Working principle: When in use, place the lower support 2 on the extension rod 3 and fix it with the semi-circular fixing plate 18 on the side. Then, drive the upper support 6 to move above the shear pin 17 through the first straight rod 11, and then cover it. Next, pull the hand lever 13 to align the middle hole of the lower support 2 on the left side of the second straight rod 15 with the bolt 8. Then, insert the steel pipe of the upper support 6 into the upper part of the shear pin 17, and screw the nut 7 and washer 9 onto the upper part of the bolt 8. Pass the bolt 8 through the center of the shear pin 17 and tighten the lower part of the bolt 8 to the lower support 2. When disassembling, use two wrenches. One wrench fixes the upper part of the bolt 8, and the other wrench rotates the nut 7 to pull out the shear pin 17.

[0029] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0030] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A convenient shearing pin disassembly tool for a water turbine, characterized in that: It includes a guide vane arm (4) and a square hollow block (1) connected by a cylinder (19). The guide vane arm (4) is fixedly installed on the outer circumferential surface of the cylinder (19). A shear pin (17) is rotatably installed in the middle hollow part of the guide vane arm (4). A rocker arm (5) is rotatably installed on the upper half of the shear pin (17). An upper support (6) is slidably installed on the upper surface of the rocker arm (5). A first straight rod (11) is fixedly installed on the outer circumferential surface of the upper support (6). A bolt (8) is slidably installed in the hollow part of the shear pin (17). A nut (7) is slidably installed on the part of the bolt (8) near the upper end. A lower support (2) is installed on the part of the bolt (8) near the lower end. A boss (20) is installed on the upper surface of the lower support (2). An extension rod (3) is slidably installed on the lower surface of the lower support (2).

2. The convenient turbine shearing pin disassembly tool according to claim 1, characterized in that: A washer (9) is slidably installed on the part of the bolt (8) near the upper end. The upper support (6) is slidably installed on the lower surface of the washer (9).

3. The convenient turbine shearing pin disassembly tool according to claim 1, characterized in that: The first straight rod (11) is fixedly installed on the outer circumferential surface of the upper support (6). A first cylindrical rod (10) is fixedly installed on the lower surface of the first straight rod (11).

4. A convenient turbine shear pin disassembly tool according to claim 1, characterized in that: The extension rod (3) is slidably installed on the lower surface of the lower support (2). A semi-circular fixing plate (18) is fixedly installed on the upper surface of the extension rod (3). The lower support (2) is slidably installed on the inner side surface of the semi-circular fixing plate (18).

5. A convenient shear pin disassembly tool for a water turbine according to claim 1, characterized in that: A second straight rod (15) is fixedly installed at the right end of the extension rod (3). A second cylindrical rod (14) is fixedly installed on the upper right surface of the second straight rod (15). A circular stopper (12) is fixedly installed at the upper end of the second cylindrical rod (14).

6. The convenient turbine shearing pin disassembly tool according to claim 1, characterized in that: The first cylindrical rod (10) is fixedly installed on the lower surface of the first straight rod (11). A hand rod (13) is fixedly installed on the lower surface of the first cylindrical rod (10). A spring (16) is fixedly installed on the lower right surface of the hand rod (13). The lower end of the spring (16) is fixedly installed on the second straight rod (15).

7. A convenient turbine shear pin disassembly tool according to claim 1, characterized in that: The guide vane arm (4) is slidably installed on the lower surface of the rocker arm (5).

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