A protective cover for a shear pin proximity switch of a hydroelectric power station turbine unit

Abstract

This utility model relates to the field of hydropower technology, specifically to a protective cover for a proximity switch of a turbine unit in a hydropower station. The cover includes a main body and a top cover hinged to the top of the main body. The bottom of the main body has mounting screw holes, and the front center or upper part of the main body has mounting holes for fixing the proximity switch, allowing the proximity switch to be mounted above the bottom of the main body. The side or back of the main body has cable outlet holes. This utility model adopts a full-coverage protective cover design, which effectively prevents personnel from stepping on it, avoiding damage to the proximity switch and wiring. Furthermore, the sealed design isolates dust, debris, and other impurities, ensuring detection accuracy. In humid environments, it provides moisture protection, extending equipment life and reducing maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of hydropower technology, and more specifically, to a protective cover for a shear pin proximity switch of a hydropower station turbine unit. Background Technology

[0002] In the operation of hydroelectric turbine units, shear pin proximity switches play a crucial role. They can accurately detect the status of the shear pins in real time, and are a key link in ensuring the safe and stable operation of the equipment. Previously, in relatively simple and safe working environments, shear pin proximity switches were usually directly exposed. Because the equipment's operating scenarios are relatively simple, this exposed installation method can meet basic detection needs, and installation and maintenance are relatively simple, requiring only regular periodic inspections.

[0003] With the expansion of industrial production scale and the upgrading of technology, the working environment is becoming increasingly complex. On the one hand, in some complex and harsh industrial sites, such as dusty, high-humidity or areas prone to mechanical collisions, traditional direct-exposed proximity switches frequently encounter problems, mainly in the following aspects: (1) dust accumulation affects detection accuracy, (2) moisture intrusion leads to component damage, and (3) mechanical collisions directly damage the equipment. These issues not only reduce the accuracy of detection but also significantly shorten the service life of the equipment and increase maintenance costs and downtime. On the other hand, since shear pin proximity switches are often located near areas where people are active, there is a risk of accidental trampling. Once trampling occurs, it will not only damage the proximity switch and affect the normal operation of the equipment but may also threaten the safety of the personnel.

[0004] Existing protective measures are only partially effective in addressing the aforementioned problems. For example, L-shaped angle iron brackets are commonly used to fix shear pin proximity switches, but L-shaped angle iron brackets have poor stability and are easily loosened by vibrations and shaking during equipment operation, which can lead to malfunctions of the proximity switch. In addition, L-shaped angle iron brackets cannot isolate dust, debris, and other impurities.

[0005] Therefore, there is an urgent need for a protective cover that can effectively protect the shear pin proximity switch from the effects of harsh environments and prevent people from stepping on it. Utility Model Content

[0006] The purpose of this utility model is to provide a protective cover for the shear pin proximity switch of a hydroelectric turbine unit, so as to solve the technical problems of how to protect the shear pin proximity switch from the influence of harsh environment and prevent people from trampling on it.

[0007] This utility model is achieved through the following technical solution: a protective cover for a proximity switch of a shear pin of a hydropower station turbine unit, including a protective cover body and a top cover hinged to the top of the protective cover body. The bottom of the protective cover body is provided with a mounting screw hole, and the front center or upper part of the protective cover body is provided with a mounting hole for mounting and fixing the proximity switch, so as to mount the proximity switch above the bottom of the protective cover body. The side or back of the protective cover body is provided with a wire outlet hole.

[0008] According to a preferred embodiment, the protective cover is a hollow cuboid.

[0009] According to a preferred embodiment, the protective cover is made of a metal material.

[0010] According to a preferred embodiment, the protective cover is made of stainless steel.

[0011] According to a preferred embodiment, the mounting hole is a circular hole adapted to the shape of the proximity switch.

[0012] According to a preferred embodiment, the outlet hole is a gate-shaped hole.

[0013] According to a preferred embodiment, the top cover is a trapezoidal flip cover with trapezoidal sides.

[0014] According to a preferred embodiment, the trapezoidal flap and the protective cover body are connected by a torsion spring hinge.

[0015] The technical solution of the protective cover for the shear pin proximity switch of the hydropower station turbine unit provided by this utility model has at least the following advantages and beneficial effects: (1) The design of the full-coverage protective cover can effectively block people from stepping on it and avoid damage to the proximity switch and wiring. On the other hand, the sealed design can isolate dust, debris and other impurities, ensure detection accuracy, prevent moisture in humid environments, extend equipment life and reduce maintenance costs; (2) The protective cover has a stable structure and is easy to install, which can reduce the risk of malfunction caused by equipment vibration and is easy to clean and maintain. Attached Figure Description

[0016] Figure 1 A schematic diagram of the overall structure of the protective cover for the shear pin proximity switch of the hydropower station turbine unit provided in Embodiment 1 of this utility model;

[0017] Figure 2 This is a schematic diagram of the installation of the protective cover for the shear pin proximity switch of the hydropower station turbine unit provided in Embodiment 1 of this utility model;

[0018] Figure 3 This is a front view of the protective cover for the shear pin proximity switch of the hydropower station turbine unit provided in Embodiment 1 of this utility model;

[0019] Figure 4 This is a side view of the protective cover for the shear pin proximity switch of the hydropower station turbine unit provided in Embodiment 1 of this utility model;

[0020] Figure 5 This is a top view of the protective cover for the shear pin proximity switch of the hydropower station turbine unit provided in Embodiment 1 of this utility model;

[0021] Figure 6 A bottom view of the protective cover for the shear pin proximity switch of a hydropower station turbine unit provided in Embodiment 1 of this utility model;

[0022] Reference numerals: 100-protective cover body, 110-mounting hole, 120-cab outlet hole, 200-top cover, 300-proximity switch, 400-cable. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] Example 1

[0025] This embodiment provides a protective cover for a proximity switch of a shear pin in a hydropower station turbine unit. Figure 1 This is a schematic diagram of the overall structure of the protective cover for the shear pin proximity switch of the hydroelectric turbine unit. (See attached diagram) Figure 1 As shown, the protective cover for the shear pin proximity switch of the hydropower station turbine unit includes a protective cover body 100 and a top cover 200 hinged to the top of the protective cover body 100.

[0026] The protective cover is a hollow cuboid; in this embodiment, the dimensions of the hollow rectangle are set to 90*60*60mm, and it is made of a 4mm thick metal material, such as carbon steel, aluminum alloy or stainless steel. In this embodiment, stainless steel is preferred to be used to make the protective cover, relying on the corrosion resistance of stainless steel to extend the service life of the protective cover in a humid environment.

[0027] See Figure 6As shown, the bottom of the protective cover body 100 is provided with mounting screw holes; in this embodiment, four mounting screw holes with a diameter of 5.7mm are provided for fixing the protective cover to improve its structural stability, thereby effectively avoiding false alarms of shear pin shearing signals caused by misalignment of the proximity switch 300 due to turbine vibration, mechanical impact, etc.; in addition, to reduce the impact of vibration and shaking during equipment operation on the protective cover, a shock-absorbing layer can be provided between the protective cover and its mounting position to absorb vibration and shaking energy, further improving the structural stability of the protective cover. For specific installation of the protective cover, please refer to [reference needed]. Figure 2 As shown. See also Figure 3 As shown, the protective cover body 100 has a mounting hole 110 on the center or upper part of its front side for mounting and fixing the proximity switch 300, so that the proximity switch 300 is mounted on the bottom of the protective cover body 100. In this embodiment, the mounting hole 110 is a circular hole adapted to the shape of the proximity switch 300. According to the actual shape parameters of the proximity switch 300 used, the diameter of the mounting hole 110 is set to 13mm, and the proximity switch 300 is directly fixed. By mounting the proximity switch 300 on the bottom of the protective cover body 100 and leaving a certain gap between it and the bottom of the protective cover, water intrusion can be effectively prevented from damaging the proximity switch 300.

[0028] See Figure 4 As shown, the protective cover body 100 has a cable outlet hole 120 on its side or back; in this embodiment, the cable outlet hole 120 is a gate-shaped hole. According to the shape parameters of the proximity switch 300 cable 400, the height and width of the gate-shaped hole are set to 40mm for the proximity switch 300 cable 400 to run.

[0029] See Figure 5 As shown, the top cover 200 is a trapezoidal flip cover with trapezoidal sides; in this embodiment, the height of the trapezoidal side is set to 20mm, the secondary height is set to 10mm, and a torsion spring is used to hinge the trapezoidal flip cover and the protective cover body 100; thus, when the trapezoidal flip cover is opened to complete the maintenance of the internal proximity switch 300, it can automatically spring back to close the opening above the protective cover, maintaining the sealed structure inside the protective cover.

[0030] In summary, this embodiment adopts a full-coverage protective cover design, which effectively prevents personnel from stepping on it and avoids damage to the proximity switch 300 and wiring. On the other hand, the sealed design can isolate dust, debris and other impurities, ensuring detection accuracy. It can also prevent moisture in humid environments, extend equipment life, and reduce maintenance costs. The protective cover has a stable structure, is easy to install, reduces the risk of malfunction caused by equipment vibration, and is easy to clean and maintain.

[0031] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A protective cover for a proximity switch for a shear pin of a hydroelectric power plant hydro-turbine unit, characterized in that, The device includes a protective cover body (100) and a top cover (200) hinged to the top of the protective cover body (100). The bottom of the protective cover body (100) is provided with mounting screw holes. The center or upper part of the front of the protective cover body (100) is provided with mounting holes (110) for mounting and fixing a proximity switch (300) so that the proximity switch (300) can be mounted above the bottom of the protective cover body (100). The side or back of the protective cover body (100) is provided with a wire outlet hole (120).

2. The hydroelectric generating station hydro-turbine unit shear pin proximity switch guard of claim 1, wherein, The protective cover is a hollow cuboid.

3. The hydroelectric generating station hydro-turbine unit shear pin proximity switch guard of claim 2, wherein, The protective cover is made of metal.

4. The hydroelectric generating station hydro-turbine unit shear pin proximity switch guard of claim 3, wherein, The protective cover is made of stainless steel.

5. The hydroelectric plant hydro-turbine unit shear pin proximity switch guard of claim 1, wherein, The mounting hole (110) is a circular hole adapted to the shape of the proximity switch (300).

6. The hydroelectric plant hydro-turbine unit shear pin proximity switch guard of claim 1, wherein, The outlet hole (120) is a gate-shaped hole.

7. The hydroelectric plant hydro-turbine unit shear pin proximity switch guard of claim 1, wherein, The top cover (200) is a trapezoidal flip cover with trapezoidal sides.

8. The hydroelectric generating unit shear pin proximity switch guard of claim 7, wherein, The trapezoidal flap is hinged to the protective cover body (100) by a torsion spring.

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