A turbine top cover for visual monitoring

Abstract

This utility model discloses a turbine top cover for visual monitoring, relating to the technical field of turbine top cover structure. The turbine top cover for visual monitoring includes a sealing cover plate, an anti-impact locking assembly, a cover body mounted on the turbine casing, and a transparent cover. An observation hole is provided on the cover body, and the transparent cover is fixedly mounted within the observation hole. The sealing cover plate includes an outer edge and a pressure-resistant part. The outer edge is located on the outer side wall of the cover body. The pressure-resistant part is located within the observation hole and connected to the outer edge. The pressure-resistant part abuts against the transparent cover. A first bolt is provided between the outer edge and the cover body, fixing the outer edge and the cover body together. The anti-impact locking assembly includes a pressure plate with a first limiting groove, into which the nut of the first bolt can extend. This utility model can effectively improve the water pressure resistance of the transparent cover on the turbine top cover, effectively preventing water pressure damage and leakage.

Description

Technical Field

[0001] This utility model relates to the technical field of turbine top cover structure, and more specifically, to a turbine top cover for visual monitoring. Background Technology

[0002] Traditional turbine top cover structures primarily function as mechanical seals and load-bearing structures, lacking real-time visual monitoring of internal component operation. This makes it difficult to detect potential faults such as blade wear, guide vane deformation, and abnormal vibration in their early stages. Existing monitoring solutions mostly rely on externally mounted sensors, which suffer from drawbacks such as complex installation, disruption of water flow patterns, and limited monitoring dimensions. There is an urgent need for an integrated and intelligent top cover structure design to improve turbine operational safety and maintenance efficiency.

[0003] In existing technologies, observation holes are typically made in the top cover of a water turbine, with a sealed transparent cover embedded in it. A monitoring module is then placed on the outside of the transparent cover to inspect components such as the impeller inside. However, due to the high water pressure inside the water turbine, directly making holes in the top cover and installing a transparent cover would affect the water pressure resistance of the top cover, making it relatively weak and susceptible to impact damage. Utility Model Content

[0004] The purpose of this utility model is to provide a turbine top cover for visual monitoring, which can effectively improve the water pressure resistance of the transparent cover on the turbine top cover and effectively prevent water pressure from damaging the transparent cover and causing leakage.

[0005] The embodiments of this utility model are implemented as follows:

[0006] This application provides a turbine top cover for visual monitoring, including a cover body disposed on the turbine casing and a transparent cover for observing the internal conditions of the turbine. The cover body has an observation hole, and the transparent cover is fixedly disposed in the observation hole and sealed with the observation hole. The application also includes:

[0007] A sealing cover plate includes an outer edge and a pressure-resistant part that is adapted to seal the observation hole. The outer edge is circumferentially disposed on the outer side wall of the cover body around the observation hole. The pressure-resistant part is disposed inside the observation hole and connected to the outer edge. The pressure-resistant part abuts against the transparent cover. A first bolt is disposed between the outer edge and the cover body, and the first bolt fixes the outer edge and the cover body together.

[0008] An anti-impact locking assembly includes a pressure plate fixedly disposed on the outer side wall of the cover body, the pressure plate being fitted to the outer edge, and a first limiting groove being provided on the pressure plate, into which the nut of the first bolt can extend.

[0009] In some embodiments of this utility model, a second limiting groove is provided on the outer edge, and one end of the nut of the first bolt is located in the first limiting groove, and the other end is located in the second limiting groove.

[0010] In some embodiments of this utility model, the nut of the first bolt is a polygonal structure, and both the first limiting groove and the second limiting groove are polygonal grooves adapted to the nut.

[0011] In some embodiments of this utility model, the outer edge is an annular plate structure, which is sleeved on the pressure-resistant part.

[0012] In some embodiments of this utility model, an auxiliary plate is provided on the outer edge of the pressure plate, and a second bolt is provided between the auxiliary plate and the cover body, the second bolt fixing the auxiliary plate and the cover body together.

[0013] In some embodiments of this utility model, a limiting ring is fixedly provided inside the observation hole. The limiting ring is located on the side of the transparent cover away from the pressure-resistant part, and the limiting ring abuts against the transparent cover.

[0014] In some embodiments of this utility model, a sealing assembly is provided between the pressure-resistant part and the inner wall of the observation hole. The sealing assembly includes a sealing ring. An annular groove is circumferentially formed on the outer surface of the pressure-resistant part. The sealing ring is disposed in the annular groove and can abut against the inner wall of the observation hole.

[0015] Compared with the prior art, the embodiments of this utility model have at least the following advantages or beneficial effects:

[0016] This utility model provides a turbine top cover for visual monitoring. It uses a first bolt to fix the outer edge of a sealing cover plate to the cover body, and then abuts against a transparent cover through a pressure-resistant part, which can further increase the water pressure resistance of the transparent cover. Furthermore, it can also fix a pressure plate to the cover body, allowing the pressure plate to provide secondary pressure resistance. The aforementioned outer edge is connected to the cover body by the first bolt, causing the pressure plate to fit against the outer edge. A first limiting groove is provided on the pressure plate, allowing the nut of the first bolt to extend into the first limiting groove. The first limiting groove can limit the movement and rotation of the nut of the first bolt in the axial direction, thus preventing loosening. Simultaneously, it can also limit the lateral displacement of the first bolt, avoiding the problem of concentrated shear force on the first bolt due to vibration. Therefore, this utility model utilizes a dual pressure-resistant design with a sealing cover plate and a pressure plate to enhance water pressure resistance. At the same time, the first limiting groove mechanically locks the nut of the first bolt, enhancing structural reliability and preventing the failure of the first bolt caused by high-pressure water flow impact. This allows the sealing cover plate and pressure plate to have better water pressure resistance after being combined, effectively avoiding leakage problems caused by insufficient water pressure resistance. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the installation structure of an embodiment of the present utility model.

[0019] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0020] Figure 3 This is a schematic cross-sectional view of the sealing cover plate in an embodiment of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the red pressure plate in an embodiment of this utility model.

[0022] Icons: 1-Cover body; 2-Transparent cover; 3-Observation hole; 4-Sealing cover plate; 401-Outer edge; 402-Pressure-resistant part; 5-First bolt; 6-Pressure plate; 7-First limiting groove; 8-Second limiting groove; 9-Second bolt; 10-Auxiliary plate; 11-Limiting ring; 12-Sealing ring; 13-Mounting groove. 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] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0025] Example

[0026] Please refer to Figures 1-4 This embodiment provides a turbine top cover for visual monitoring, including a sealing cover plate 4, an anti-impact locking assembly, a cover body 1 disposed on the turbine casing, and a transparent cover 2 for observing the internal conditions of the turbine. The cover body 1 has an observation hole 3, and the transparent cover 2 is fixedly disposed within the observation hole 3 and seals against it. The sealing cover plate 4 includes an outer edge portion 401 and a pressure-resistant portion 402 that seals against the observation hole 3. The outer edge portion 401 is circumferentially disposed on the outer side wall of the cover body 1 around the observation hole 3. The pressure-resistant portion 402 is disposed within the observation hole 3 and connected to the outer edge portion 401. The pressure-resistant portion 402 abuts against the transparent cover 2. A first bolt 5 is disposed between the outer edge portion 401 and the cover body 1, fixing the outer edge portion 401 and the cover body 1 together. The anti-impact locking assembly includes a pressure plate 6 fixedly disposed on the outer side wall of the cover body 1. The pressure plate 6 is attached to the outer edge 401. A first limiting groove 7 is provided on the pressure plate 6, and the nut of the first bolt 5 can extend into the first limiting groove 7.

[0027] In this embodiment, the first bolt 5 fixes the outer edge 401 of the sealing cover plate 4 to the cover body 1, and then abuts against the transparent cover 2 through the pressure-resistant part 402, which can further increase the water pressure resistance of the transparent cover 2. Furthermore, it can also fix the pressure plate 6 to the cover body 1, allowing the pressure plate 6 to play a secondary pressure-resistant role. The outer edge 401 is connected to the cover body 1 by the first bolt 5, so that the pressure plate 6 fits against the outer edge 401. The pressure plate 6 has a first limiting groove 7, allowing the nut of the first bolt 5 to extend into the first limiting groove 7. The first limiting groove 7 can limit the nut of the first bolt 5, restricting its movement and rotation in the axial direction, thus preventing loosening. At the same time, it can also limit the lateral displacement of the first bolt 5, avoiding the problem of shear force concentration of the first bolt 5 due to vibration.

[0028] Therefore, this embodiment has the following effects: The dual pressure-resistant design using the sealing cover plate 4 and the pressure plate 6 enhances water pressure resistance; the first limiting groove 7 mechanically locks the nut of the first bolt 5, preventing loosening; the first limiting groove 7 also constrains the lateral movement of the first bolt 5, preventing stress concentration failure caused by high-pressure water flow impact, thus enhancing structural reliability. In summary, this embodiment allows the sealing cover plate 4 and the pressure plate 6 to have better water pressure resistance, effectively preventing leakage caused by insufficient water pressure resistance.

[0029] Specifically, in this embodiment, the anti-impact locking assembly includes multiple pressure plates 6, each pressure plate being a strip-shaped structure. The multiple pressure plates 6 are arranged side-by-side at even intervals and abut against the outer edge 401 of the sealing cover plate 4. Each first bolt 5 extends into the first limiting groove 7 at both ends of the pressure plate 6.

[0030] In this embodiment, a second limiting groove 8 is provided on the outer edge portion 401. One end of the nut of the first bolt 5 is located in the first limiting groove 7, and the other end is located in the second limiting groove 8. The second limiting groove 8 can further limit the nut of the first bolt 5, preventing the nut of the first bolt 5 from rotating, and at the same time, it can work with the first limiting groove 7 to further enhance the reliability of the structure.

[0031] In some embodiments of this example, the nut of the first bolt 5 is a polygonal structure, and both the first limiting groove 7 and the second limiting groove 8 are polygonal grooves adapted to the nut. Specifically, the polygonal structure is a hexagonal structure.

[0032] In some embodiments of this example, the outer edge portion 401 is an annular plate structure, which is sleeved on the pressure-resistant portion 402. The annular plate structure of the outer edge portion 401 allows for the convenient and evenly spaced placement of the first bolts 5 in the circumferential direction, enabling the first bolts 5 to be securely connected to the cover body 1 via threaded engagement.

[0033] In some embodiments of this example, an auxiliary plate 10 is provided on the outer edge of the pressure plate 6, and a second bolt 9 is provided between it and the cover body 1. The second bolt 9 fixes the auxiliary plate 10 and the cover body 1 together. The second bolt 9 is used to connect the auxiliary plate 10 and the cover body 1, so as to fix the pressure plate 6 to the outer wall of the cover body 1. Specifically, the auxiliary plate 10 is adapted to the outer edge 401, and its cross-section is an L-shaped structure. The L-shaped structure includes a vertically connected vertical plate and a horizontal plate. The vertical plate is in close contact with the outer surface of the outer edge 401, and the horizontal plate is fixed to the cover body 1 by the second bolt 9.

[0034] Furthermore, in this embodiment, a limiting ring 11 is fixedly installed inside the observation hole 3. The limiting ring 11 is located on the side of the transparent cover 2 away from the pressure-resistant part 402, and the limiting ring 11 abuts against the transparent cover 2. The limiting ring 11 mainly serves to limit the transparent cover 2, preventing the transparent cover 2 from entering the turbine.

[0035] In this embodiment, a sealing assembly is provided between the pressure-resistant part 402 and the inner wall of the observation hole 3. The sealing assembly includes a sealing ring 12. An annular groove is formed circumferentially on the outer surface of the pressure-resistant part 402. The sealing ring 12 is disposed in the annular groove and can abut against the inner wall of the observation hole 3. The sealing ring 12 in the annular groove mainly serves a sealing function to prevent water in the turbine from leaking through the gaps between the components.

[0036] It should be noted that in this embodiment, the same sealing component (not shown in the figure) is also provided between the transparent cover 2 and the inner wall of the observation hole 3, which can further improve the sealing effect. In this embodiment, the surface roughness Ra of the transparent cover 2 is ≤1.6μm, and the side of the transparent cover 2 located on the turbine impeller side is flush with the flow channel of the runner chamber, which can avoid increasing fluid resistance.

[0037] It is worth noting that in this embodiment, the side of the pressure-resistant part 402 that is in contact with the transparent cover 2 is provided with an installation groove 13, which can be used to install a monitoring module. The monitoring module in this embodiment includes a flash camera, which is connected to an external terminal through an image signal transmission line. It captures images of the relatively stationary runner blades and moving guide vanes according to the turbine rotation frequency, so as to realize the visual monitoring of defects such as wear and cracks.

[0038] 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 turbine top cover for visual monitoring, comprising a cover body disposed on the turbine casing and a transparent cover for observing the internal conditions of the turbine, wherein the cover body has an observation hole, and the transparent cover is fixedly disposed within the observation hole and sealed to the observation hole, characterized in that, Also includes; A sealing cover plate includes an outer edge and a pressure-resistant part that is adapted to seal the observation hole. The outer edge is circumferentially disposed on the outer side wall of the cover body around the observation hole. The pressure-resistant part is disposed inside the observation hole and connected to the outer edge. The pressure-resistant part abuts against the transparent cover. A first bolt is disposed between the outer edge and the cover body, and the first bolt fixes the outer edge and the cover body together. An anti-impact locking assembly includes a pressure plate fixedly disposed on the outer side wall of the cover body, the pressure plate being fitted to the outer edge, and a first limiting groove being provided on the pressure plate, into which the nut of the first bolt can extend.

2. The turbine top cover for visual monitoring according to claim 1, characterized in that, A second limiting groove is provided on the outer edge, and one end of the nut of the first bolt is located in the first limiting groove, and the other end is located in the second limiting groove.

3. The turbine top cover for visual monitoring according to claim 2, characterized in that, The nut of the first bolt has a polygonal structure, and both the first limiting groove and the second limiting groove are polygonal grooves adapted to the nut.

4. The turbine top cover for visual monitoring according to claim 1, characterized in that, The outer edge is a ring-shaped plate structure, which is sleeved on the pressure-resistant part.

5. The turbine top cover for visual monitoring according to claim 1, characterized in that, An auxiliary plate is provided on the outer edge of the pressure plate, and a second bolt is provided between the auxiliary plate and the cover body. The second bolt fixes the auxiliary plate and the cover body together.

6. The turbine top cover for visual monitoring according to claim 1, characterized in that, A limiting ring is fixedly installed inside the observation hole. The limiting ring is located on the side of the transparent cover away from the pressure-resistant part, and the limiting ring abuts against the transparent cover.

7. The turbine top cover for visual monitoring according to claim 1, characterized in that, A sealing assembly is provided between the pressure-resistant part and the inner wall of the observation hole. The sealing assembly includes a sealing ring. An annular groove is circumferentially formed on the outer surface of the pressure-resistant part. The sealing ring is disposed in the annular groove and can abut against the inner wall of the observation hole.

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