Well cover assembly for hydroelectric power station shaft

Abstract

The application provides a water power station vertical shaft well lid assembly which comprises a well lid and a cover turning mechanism. An annular support plate is arranged in the water power station vertical shaft and is connected with the inner wall of the water power station vertical shaft. The well lid is arranged in the water power station vertical shaft and is located on the annular support plate. The cover turning mechanism is arranged on the ground and is adjacent to the water power station vertical shaft. The cover turning mechanism comprises a fixed bottom plate, a first fixed side plate, a second fixed side plate, a driving shaft and a turning arm. The first fixed side plate and the second fixed side plate are arranged at intervals in the left-right direction. One end of the driving shaft is rotatably connected with the first fixed side plate, and the other end of the driving shaft is rotatably connected with the second fixed side plate. One end of the turning arm is connected with the driving shaft, and the other end of the turning arm is connected with the well lid. A driving motor is arranged on the fixed bottom plate, and the driving end of the driving motor is drivingly connected with the driving shaft. Therefore, the water power station vertical shaft well lid assembly has the characteristics of facilitating the opening and closing of the water power station vertical shaft.

Description

Technical Field

[0001] This invention belongs to the field of hydropower station technology, specifically relating to a manhole cover assembly for hydropower station shafts. Background Technology

[0002] In related technologies, manhole covers used in hydropower station shafts are mostly fixed using mechanical components such as bolts, screws, and clamps. This type of mechanical fixing method is cumbersome to operate, and the disassembly and installation of manhole covers is inconvenient, consuming a lot of time and labor costs. At the same time, the manhole covers used in hydropower station shafts are usually heavy, and when opening and closing the shaft manually, the manhole covers need to be moved manually, which is not only time-consuming and labor-intensive, but also poses operational safety hazards.

[0003] Therefore, the manhole covers of hydropower station shafts in related technologies have the problem of being difficult to open and close. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, embodiments of the present invention provide a manhole cover assembly for a hydropower station shaft, wherein the hydropower station shaft is located on the ground.

[0006] The manhole cover assembly for hydropower station shafts according to an embodiment of the present invention includes: The manhole cover is provided inside the vertical shaft of the hydropower station, and the annular support plate is connected to the inner wall of the vertical shaft of the hydropower station. The manhole cover is located inside the vertical shaft of the hydropower station and is situated on the annular support plate. A flip-top mechanism is provided on the ground and adjacent to the vertical shaft of the hydropower station. The flip-top mechanism includes a fixed base plate, a first fixed side plate, a second fixed side plate, a drive shaft, and a flipping arm. The first and second fixed side plates are spaced apart in the left-right direction. One end of the drive shaft is rotatably connected to the first fixed side plate, and the other end of the drive shaft is rotatably connected to the second fixed side plate. One end of the flipping arm is connected to the drive shaft, and the other end of the flipping arm is connected to the manhole cover. A drive motor is provided on the fixed base plate. The drive end of the drive motor is connected to the drive shaft to drive the drive shaft to rotate, thereby driving the tilting arm to rotate around the drive shaft.

[0007] It is understandable that when the hydropower station shaft needs to be opened, the drive end of the drive motor drives the drive shaft to rotate, which in turn drives the tilting arm to rotate around the drive shaft. The other end of the tilting arm is connected to the manhole cover, which in turn drives the manhole cover to move, thereby opening the hydropower station shaft. When the hydropower station shaft needs to be closed, the drive end of the drive motor drives the drive shaft to rotate in the opposite direction, which in turn drives the tilting arm to rotate around the drive shaft. The other end of the tilting arm is connected to the manhole cover, which in turn drives the manhole cover to move, thereby closing the hydropower station shaft.

[0008] The manhole cover assembly for hydropower station shafts in this embodiment of the invention achieves the effect of opening and closing the hydropower station shaft by setting a flip-top assembly to drive the manhole cover to move.

[0009] Therefore, the manhole cover assembly for hydropower station shafts in this embodiment of the invention has the feature of facilitating the opening and closing of hydropower station shafts.

[0010] In some embodiments, the drive end of the drive motor is provided with a worm gear, and the drive shaft is provided with a worm wheel, the worm wheel and the worm gear meshing with each other.

[0011] In some embodiments, there are two flip arms, which are spaced apart in the left-right direction. The two flip arms are a first flip arm and a second flip arm, respectively. The other end of the first flip arm is provided with a first connecting member, and the other end of the second flip arm is provided with a second connecting member. The manhole cover is provided with a third connector corresponding to the first connector and a fourth connector corresponding to the second connector. The third connector is connected to the first connector via a first fastener, and the fourth connector is connected to the second connector via a second fastener.

[0012] In some embodiments, the first connector is provided with a first groove, a portion of the third connector is fitted into the first groove, the first connector is provided with a first connecting hole communicating with the first groove, the third connector is provided with a third connecting hole corresponding to the first connecting hole, and the first fastener passes through the first connecting hole and the third connecting hole. The second connector has a second groove, and part of the fourth connector fits into the second groove. The second connector has a second connecting hole that communicates with the second groove. The fourth connector has a fourth connecting hole corresponding to the second connecting hole. The second fastener passes through the second connecting hole and the fourth connecting hole.

[0013] In some embodiments, a first movable wheel is provided on the outer side surface of the first fixed side plate, and a second movable wheel is provided on the outer side surface of the second fixed side plate; The fixed base plate is also provided with a third fixed side plate. One end of the third fixed side plate is connected to the end of the first fixed side plate away from the hydropower station shaft, and the other end of the third fixed side plate is connected to the end of the second fixed side plate away from the hydropower station shaft. The flip-top mechanism of the hydropower station shaft cover assembly of this embodiment of the invention also includes a flip-top cover, which is rotatably connected to the side of the third fixed side plate away from the hydropower station shaft.

[0014] In some embodiments, the manhole cover assembly for hydropower station shafts of the present invention further includes a water-filled ball, which is disposed below the annular support plate, abuts against the annular support plate, and is connected to the inner wall of the hydropower station shaft; there are multiple water-filled balls, which are spaced apart circumferentially on the inner wall of the hydropower station shaft; a sealing safety valve is provided on the water-filled ball.

[0015] In some embodiments, the manhole cover assembly for hydropower station shafts of the present invention further includes a support block, the support block being disposed below the annular support plate, the support block abutting against the annular support plate, and the support block being connected to the inner wall of the hydropower station shaft; there are multiple support blocks, and the multiple support blocks are spaced apart in the circumferential direction of the inner wall of the hydropower station shaft.

[0016] In some embodiments, the manhole cover assembly for hydropower station shafts of the present invention further includes a filter plate, which is disposed inside the hydropower station shaft and between the annular support plate and the manhole cover; The filter plate includes an annular fixing member and a filter screen disposed within the annular fixing member. The upper surface of the annular fixing member is provided with a positioning hole, and the lower surface of the manhole cover is provided with a positioning rod corresponding to the positioning hole.

[0017] In some embodiments, the manhole cover is provided with a first annular groove, and a first support column is provided in the first annular groove. One end of the first support column is connected to one side wall of the first annular groove, and the other end of the first support column is connected to the other side wall of the first annular groove.

[0018] In some embodiments, the manhole cover assembly for hydropower station shafts of the present invention further includes a float level gauge, the float level gauge including a detection body, a detection rod and a detection float, the detection rod being disposed at the lower end of the detection body, the detection float being slidably disposed on the detection rod, and a limiting plate being provided on the detection body; The manhole cover is provided with a first through hole, and the filter screen is provided with a second through hole corresponding to the first through hole; the diameter of the first through hole is smaller than the maximum size of the limiting plate. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a manhole cover assembly for a hydropower station shaft according to an embodiment of the present invention; Figure 2 This is one of the exploded views of a manhole cover assembly for a hydropower station shaft according to an embodiment of the present invention; Figure 3 yes Figure 2 Enlarged view of part A in the middle; Figure 4 This is the second exploded view of the manhole cover assembly for hydropower station shafts according to an embodiment of the present invention.

[0020] Figure label: 100. Hydropower station shaft; 200. Ground surface; 1. Manhole cover; 101. First through hole; 102. First annular groove; 1021. First support post; 2. Flip-top mechanism; 201. Fixed base plate; 202. First fixed side plate; 203. Second fixed side plate; 204. Third fixed side plate; 205. Tilting manhole cover; 206. Drive shaft; 2061. First retaining ring; 2062. Second retaining ring; 207. Tilting arm; 2071. First tilting arm; 2072. Second tilting arm; 208. Worm gear; 209. Worm wheel; 210. First fastener; 211. Second fastener; 212. Drive motor; 3. Circular support plate; 4. First connector; 401. First groove; 402. First connecting hole; 5. Second connector; 501. Second groove; 502. Second connecting hole; 6. Third connector; 601. Third connecting hole; 7. Fourth connector; 701. Fourth connecting hole; 8. Water-filled balloon; 9. Support block; 10. Filter plate; 110. Annular fastener; 120. Filter screen; 130. Second through hole; 11. Float level gauge; 111. Detection body; 112. Detection rod; 113. Detection float; 114. Limiting plate; 12. Positioning holes; 13. Positioning rod; 14. Glow-in-the-dark plastic sheet; 15. First moving wheel; 16. Second moving wheel; 17. Cover. Detailed Implementation

[0021] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0022] In order to solve the problem that the manhole cover 1 for the vertical shaft 100 of a hydropower station is not easy to open and close in the related technology, the present invention provides a manhole cover 1 assembly for the vertical shaft 100 of a hydropower station.

[0023] like Figures 1-4 As shown, the manhole cover 1 assembly for the hydropower station shaft 100 of this embodiment of the invention includes a manhole cover 1 and a flip-top mechanism 2.

[0024] It should be noted that the hydropower station shaft 100 is located 200 meters above the ground.

[0025] Meanwhile, a ring-shaped support plate 3 is provided inside the vertical shaft 100 of the hydropower station, and the ring-shaped support plate 3 is connected to the inner wall of the vertical shaft 100 of the hydropower station. The manhole cover 1 is located inside the vertical shaft 100 of the hydropower station and is located on the ring-shaped support plate 3. The flip-top mechanism 2 is located on the ground 200 and adjacent to the hydropower station shaft 100. The flip-top mechanism 2 includes a fixed base plate 201, a first fixed side plate 202, a second fixed side plate 203, a drive shaft 206, and a flipping arm 207. The first fixed side plate 202 and the second fixed side plate 203 are spaced apart in the left-right direction. One end of the drive shaft 206 is rotatably connected to the first fixed side plate 202, and the other end of the drive shaft 206 is rotatably connected to the second fixed side plate 203. One end of the flipping arm 207 is connected to the drive shaft 206, and the other end of the flipping arm 207 is connected to the manhole cover 1. A drive motor 212 is provided on the fixed base plate 201. The drive end of the drive motor 212 is connected to the drive shaft 206 to drive the drive shaft 206 to rotate, thereby driving the tilting arm 207 to rotate around the drive shaft 206.

[0026] It is understandable that when the hydropower station shaft 100 needs to be opened, the drive end of the drive motor 212 drives the drive shaft 206 to rotate, which in turn drives the tilting arm 207 to rotate around the drive shaft 206. The other end of the tilting arm 207 is connected to the manhole cover 1, which in turn drives the manhole cover 1 to move, so as to open the hydropower station shaft 100. When the hydropower station shaft 100 needs to be closed, the drive end of the drive motor 212 drives the drive shaft 206 to rotate in the opposite direction, which in turn drives the tilting arm 207 to rotate around the drive shaft 206. The other end of the tilting arm 207 is connected to the manhole cover 1, which in turn drives the manhole cover 1 to move, so as to close the hydropower station shaft 100.

[0027] The manhole cover 1 assembly for the hydropower station shaft 100 in this embodiment of the invention moves the manhole cover 1 by setting a flip cover assembly, thereby achieving the effect of opening and closing the hydropower station shaft 100.

[0028] Therefore, the manhole cover 1 assembly for the hydropower station shaft 100 in this embodiment of the invention has the feature of facilitating the opening and closing of the hydropower station shaft 100.

[0029] In some embodiments, the drive end of the drive motor 212 is provided with a worm 208, and the drive shaft 206 is provided with a worm wheel 209, and the worm wheel 209 and the worm 208 mesh with each other.

[0030] It is understandable that by setting the transmission structure between the drive motor 212 and the drive shaft 206 to a transmission structure in which the worm gear 208 and worm wheel 209 mesh, the stability and reliability of the opening and closing process of the manhole cover 1 can be significantly improved, adapting to the special working conditions of hydropower stations.

[0031] On the one hand, the worm gear 208 and worm wheel 209 transmission has a natural self-locking characteristic. When the drive motor 212 stops working, there will be no reverse transmission between the worm gear 208 and the worm wheel 209, which can keep the manhole cover 1 stably in the current open or closed position, effectively preventing the manhole cover 1 from moving unexpectedly due to external factors such as ground vibration 200, ensuring the safety of the operation of the hydropower station shaft 100, and eliminating equipment damage or personnel safety problems caused by the accidental movement of the manhole cover 1.

[0032] On the other hand, the transmission ratio of the worm gear 208 and worm wheel 209 is precise and adjustable, which can flexibly adjust the transmission efficiency according to the weight of the manhole cover 1 and the size of the shaft, so as to realize the smooth and slow movement of the manhole cover 1, avoid impact load caused by excessive opening or closing speed, reduce wear between the manhole cover 1 and the annular support plate 3 and the inner wall of the shaft, extend the overall service life of the manhole cover 1 assembly, and reduce equipment maintenance costs.

[0033] Meanwhile, the worm gear 208 and worm wheel 209 transmission have a compact structure and occupy little space, making them suitable for installation scenarios near the vertical shaft on the ground of the hydropower station 200. They do not require excessively large installation space and take into account both structural rationality and ease of installation. This further optimizes the overall user experience of the hydropower single vertical shaft well cover 1 component in this embodiment of the invention, ensuring that it can maintain stable working performance even in long-term, high-frequency opening and closing operations.

[0034] In some embodiments, there are two tilting arms 207, which are spaced apart in the left-right direction. The two tilting arms 207 are a first tilting arm 2071 and a second tilting arm 2072. The other end of the first tilting arm is provided with a first connecting member 4, and the other end of the second tilting arm 2072 is provided with a second connecting member 5. The manhole cover 1 is provided with a third connecting member 6 corresponding to the first connecting member 4 and a fourth connecting member 7 corresponding to the second connecting member 5. The third connecting member 6 is connected to the first connecting member 4 by a first fastener 210, and the fourth connecting member 7 is connected to the second connecting member 5 by a second fastener 211.

[0035] Furthermore, the drive shaft 206 is also provided with two first retaining rings 2061, which are located on both sides of the first tilting arm 2071 to prevent the first tilting arm 2071 from shifting; at the same time, the drive shaft 206 is also provided with two second retaining rings 2062, which are located on both sides of the second tilting arm 2072 to prevent the second tilting arm 2072 from shifting.

[0036] It is understandable that two tilting arms 207 are configured, and a first connecting piece 4, a second connecting piece 5, a third connecting piece 6 and a fourth connecting piece 7 are respectively provided at the connection between the first tilting arm 2071 and the second tilting arm 2072 and the manhole cover 1; On the one hand, the two spaced-apart tilting arms 207 are subjected to force synchronously, which can evenly distribute the driving force transmitted by the drive shaft 206 to the two force points of the manhole cover 1, avoiding the instability of the manhole cover 1 caused by the concentrated force on a single tilting arm 207, ensuring that the manhole cover 1 always maintains a stable state during opening and closing, further improving the smoothness of operation, and effectively avoiding the deformation, breakage and other damage problems caused by long-term overload of a single tilting arm 207, thus extending the service life of the tilting arm 207 and the manhole cover 1 assembly.

[0037] On the other hand, the corresponding arrangement of the first connecting piece 4 and the third connecting piece 6, and the second connecting piece 5 and the fourth connecting piece 7, together with the fastening connection of the first fastener 210 and the second fastener 211, realizes the detachable connection between the flipping arm 207 and the manhole cover 1. This not only ensures the stability of the connection, but also prevents the manhole cover 1 from detaching or loosening from the flipping arm 207 during the flipping process, ensuring operational safety. At the same time, it also facilitates subsequent disassembly and maintenance. When the manhole cover 1 or the flipping arm 207 is worn or damaged, the parts can be quickly separated for inspection or replacement by disassembling the first fastener 210 or the second fastener 211, without the need to completely disassemble the flipping mechanism 2, which greatly reduces the difficulty and cost of maintenance.

[0038] In some embodiments, such as Figures 1-4 As shown, the first connector 4 is provided with a first groove 401, and part of the third connector 6 is fitted into the first groove 401. The first connector 4 is provided with a first connecting hole 402 that communicates with the first groove 401. The third connector 6 is provided with a third connecting hole 601 corresponding to the first connecting hole 402. The first fastener 210 passes through the first connecting hole 402 and the third connecting hole 601. The second connector 5 is provided with a second groove 501, and a portion of the fourth connector 7 is fitted into the second groove 501. The second connector 5 is provided with a second connecting hole 502 that communicates with the second groove 501. The fourth connector 7 is provided with a fourth connecting hole 701 corresponding to the second connecting hole 502. The second fastener 211 passes through the second connecting hole 502 and the fourth connecting hole 701.

[0039] It is understood that two first connecting holes 402 can be provided, and the two first connecting holes 402 are disposed opposite to each other on the first connector 4, and the two first connecting holes 402 are connected to the first groove 401. Thus, the first fastener 210 can pass through one of the first connecting holes 402, the third connecting hole 601 and the other first connecting hole 402 in sequence to fix the first connector 4 and the third connector 6.

[0040] Two second connecting holes 502 can be provided. The two second connecting holes 502 are arranged opposite to each other on the first connector 4, and the two second connecting holes 502 are connected to the second groove 501. Thus, the second fastener 211 can pass through one of the second connecting holes 502, the fourth connecting hole 701 and the other second connecting hole 502 in sequence to fix the second connector 5 and the fourth connector 7.

[0041] On the one hand, the embedded fit of the first groove 401 with the third connector 6 and the second groove 501 with the fourth connector 7 forms a precise positioning and limiting structure. This structure can not only quickly guide the connectors to align during assembly, ensuring that the first connecting hole 402 and the third connecting hole 601, and the second connecting hole 502 and the fourth connecting hole 701 are precisely aligned, reducing assembly difficulty and improving assembly efficiency, but also effectively limit the vertical and horizontal relative displacement between the connectors. This prevents the manhole cover 1 from loosening or shifting due to force fluctuations, ground vibration, or water flow impact during the flipping process, ensuring the stability of the connection and eliminating the safety hazard of the manhole cover 1 detaching from the flipping arm 207.

[0042] On the other hand, the arrangement of the first groove 401 and the second groove 501 increases the contact area between the first connector 4 and the third connector 6, and between the second connector 5 and the fourth connector 7, so that the driving force transmitted by the flipping arm 207 can be transmitted to the manhole cover 1 more evenly, further dispersing the force on the connection part, avoiding wear, deformation or loosening caused by local force concentration, and extending the service life of the manhole cover 1 assembly for the hydropower station shaft 100 of this embodiment of the invention.

[0043] Furthermore, the precise alignment of the first connecting hole 402, the second connecting hole 502 with the corresponding third connecting hole 601 and fourth connecting hole 701, along with the separate insertion and fixing of the first fastener 210 and the second fastener 211, forms an independent fastening structure. This facilitates the subsequent inspection and replacement of individual connectors or fasteners without disassembling the entire connection structure, while ensuring uniform fastening force at each connection point and preventing the loosening of a single connection point from affecting the overall stability.

[0044] In some embodiments, a first movable wheel 15 is provided on the outer side of the first fixed side plate, and a second movable wheel 16 is provided on the outer side of the second fixed side plate; a third fixed side plate 204 is also provided on the fixed base plate 201, one end of the third fixed side plate 204 is connected to the end of the first fixed side plate 202 away from the hydropower station shaft 100, and the other end of the third fixed side plate 204 is connected to the end of the second fixed side plate 203 away from the hydropower station shaft 100; the flipping mechanism 2 also includes a flipping manhole cover 205, which is rotatably connected to the side of the third fixed side plate 204 away from the hydropower station shaft 100, and the flipping manhole cover 205 can cover the drive motor 212, drive shaft 206 and other components located above the fixed base plate 201.

[0045] Understandably, on the one hand, the first moving wheel 15 on the outer side of the first fixed side plate 202 and the second moving wheel 16 on the outer side of the second fixed side plate 203 provide convenient movement for the entire flip-top mechanism 2. When installed on-site at the hydropower station, the flip-top mechanism 2 can be easily pushed to a preset position near the hydropower station shaft 100 without the need for large hoisting equipment, thus reducing installation difficulty and labor costs. If the manhole cover 1 component needs to be inspected or moved later, its position can also be quickly adjusted using the moving wheels, improving operational convenience.

[0046] On the other hand, the third fixed side plate 204 connects the ends of the first fixed side plate 202 and the second fixed side plate 203 away from the hydropower station shaft 100 into a whole, greatly improving the structural strength and stability of the flip cover mechanism 2. This prevents the first and second fixed side plates 203 from tilting or deforming due to long-term stress from the drive shaft 206, the flip arm 207, and the manhole cover 1, ensuring smooth rotation of the drive shaft 206 and stable force distribution on the flip arm 207, further guaranteeing the smoothness of opening and closing the manhole cover 1. Simultaneously, the third fixed side plate 204 also provides lateral protection for components such as the drive motor 212 and the drive shaft 206, reducing damage to the core transmission components from external collisions and extending their service life.

[0047] Furthermore, the rotatable connection and coverable design between the flip-top manhole cover 205 and the third fixed side plate 204 provide comprehensive protection for core components such as the drive motor 212 and drive shaft 206 located above the fixed base plate 201. Simultaneously, the flip-top manhole cover 205 can be rotated open without affecting the daily inspection, debugging, and maintenance of components such as the drive motor 212 and drive shaft 206, balancing protection and ease of operation.

[0048] In some embodiments, the manhole cover 1 assembly for the hydropower station shaft 100 of the present invention further includes a water-filled ball 8, which is disposed below the annular support plate 3, abuts against the annular support plate 3, and is connected to the inner wall of the hydropower station shaft 100; there are multiple water-filled balls 8, which are spaced apart in the circumferential direction on the inner wall of the hydropower station shaft 100; a sealing safety valve is provided on the water-filled ball 8.

[0049] Understandably, multiple water-filled balls 8 are spaced apart circumferentially on the inner wall of the shaft, abutting against the annular support plate 3 and connected to the inner wall of the shaft. When the annular support plate 3 falls off due to long-term stress, wear, or loose installation, the water-filled balls 8 can quickly support the annular support plate 3 with their own elastic support force, preventing the annular support plate 3 from falling directly to the bottom of the shaft, preventing it from damaging the equipment inside the shaft or blocking the shaft. At the same time, it prevents the manhole cover 1 from losing support and shifting or loosening due to the annular support plate 3 falling off, eliminating the safety hazards and equipment failures caused by this, and buying time for subsequent maintenance and replacement of the annular support plate 3, reducing the difficulty and loss of operation and maintenance.

[0050] Furthermore, the sealing safety valve installed on the water bladder ball 8 enables automatic pressure regulation, further enhancing the reliability of support and sealing. When the water pressure in the shaft rises abnormally, causing the pressure on the water bladder ball 8 to exceed a preset threshold, the sealing safety valve will automatically open to release pressure, preventing the water bladder ball 8 from rupturing due to excessive pressure. This ensures that it can stably perform its supporting function when the annular support plate 3 falls off, while maintaining the integrity of the sealing structure. When the water pressure returns to normal, the sealing safety valve will automatically close, ensuring the supporting rigidity and sealing effect of the water bladder ball 8 without manual intervention, reducing maintenance workload. Multiple circumferentially spaced water bladder balls 8 also provide redundant protection for support and sealing. Even if a single water bladder ball 8 is damaged, the remaining water bladder balls 8 can still provide effective support for the annular support plate 3, preventing the annular support plate 3 from falling off due to the failure of a single water bladder ball 8.

[0051] In some embodiments, the manhole cover 1 assembly for the hydropower station shaft 100 of the present invention further includes a support block 9. The support block 9 is disposed below the annular support plate 3, abuts against the annular support plate 3, and is connected to the inner wall of the hydropower station shaft 100. There are multiple support blocks 9, and the multiple support blocks 9 are spaced apart in the circumferential direction of the inner wall of the hydropower station shaft 100.

[0052] Multiple support blocks 9 are spaced circumferentially on the inner wall of the hydropower station shaft 100, abutting against the annular support plate 3 and fixedly connected to the inner wall of the shaft, forming a rigid bottom support structure. This structure can directly bear the weight of the annular support plate 3 and the pressure transmitted by the manhole cover 1, effectively distributing the force at the connection between the annular support plate 3 and the inner wall of the shaft. This prevents the connection from loosening or breaking due to long-term heavy loads, fundamentally reducing the risk of the annular support plate 3 falling off, ensuring the support stability of the manhole cover 1, and eliminating equipment damage and safety hazards caused by the falling off of the annular support plate 3.

[0053] Meanwhile, the multiple circumferentially spaced support blocks 9 can achieve uniform force distribution, ensuring that the force on each part of the annular support plate 3 is balanced, and preventing the annular support plate 3 from tilting or deforming due to uneven force.

[0054] In some embodiments, the manhole cover 1 assembly for the hydropower station shaft 100 of the present invention further includes a filter plate 10, which is disposed inside the hydropower station shaft 100 and between the annular support plate 3 and the manhole cover 1. The filter plate 10 includes an annular fixing member 110 and a filter screen 120 disposed in the annular fixing member 110. The upper surface of the annular fixing member 110 is provided with a positioning hole 12, and the lower surface of the manhole cover 1 is provided with a positioning rod 13 corresponding to the positioning hole 12. The positioning rod 13 can be fitted into the positioning hole 12.

[0055] Understandably, on the one hand, the filter plate 10 is positioned between the annular support plate 3 and the manhole cover 1, and the filter screen 120 within its annular fixing member 110 can effectively intercept impurities such as mud, gravel, and debris in the vertical shaft, preventing these impurities from entering the bottom of the shaft. On the other hand, the positioning hole 12 on the upper surface of the annular fixing member 110 and the positioning rod 13 on the lower surface of the manhole cover 1 cooperate to form a precise positioning and limiting structure, enabling the filter plate 10 to be quickly aligned and installed with the manhole cover 1, ensuring the accurate installation position of the filter plate 10, preventing the filter plate 10 from shifting or misaligning during use, and ensuring the stability of the filtration effect.

[0056] In some embodiments, the manhole cover 1 is provided with a first annular groove 102, and a first support column 1021 is provided in the first annular groove 102. One end of the first support column 1021 is connected to one side wall of the first annular groove 102, and the other end of the first support column 1021 is connected to the other side wall of the first annular groove 102.

[0057] It is understandable that the first annular channel 102 divides the manhole cover 1 into two parts, and the first support column 1021 set in the first channel can connect the two parts, while not affecting the water flow through the manhole cover 1 into the hydropower station shaft 100.

[0058] In some embodiments, the well cover 1 assembly for the hydropower station shaft 100 of the present invention further includes a float level gauge 11. The float level gauge 11 includes a detection body 111, a detection rod 112 and a detection float 113. The detection rod 112 is disposed at the lower end of the detection body 111, and the detection float 113 is slidably disposed on the detection rod 112. A limiting plate 114 is provided on the detection body 111. The manhole cover 1 is provided with a first through hole 101, and the filter screen 120 is provided with a second through hole 130 corresponding to the first through hole 101; the diameter of the first through hole 101 is smaller than the maximum size of the limiting plate 114.

[0059] Furthermore, the first through hole 101 is provided with a cover 17. When it is necessary to detect the water level in the hydropower station shaft 100, the cover 17 can be removed from the first through hole 101; when it is not necessary to detect the water level in the hydropower station shaft 100, the cover 17 can be placed in the first through hole 101 to block the first through hole 101.

[0060] On the one hand, the float level gauge 11 can accurately capture changes in the liquid level in the vertical shaft by detecting the sliding of the float 113 on the detection rod 112, and provide real-time feedback on the liquid level height, so that staff can keep abreast of the liquid level in the vertical shaft 100 of the hydropower station.

[0061] On the other hand, the first through hole 101 on the manhole cover 1 corresponds precisely to the second through hole 130 on the filter screen 120, allowing the detection rod 112 and the detection float 113 to pass through. This ensures that the detection rod 112 can smoothly pass through the manhole cover 1 and the filter plate 10 and extend into the vertical shaft, and that the detection float 113 can freely slide with the liquid level changes, thus ensuring the accuracy and sensitivity of the liquid level detection.

[0062] Meanwhile, the limiting plate 114 on the detection body 111 matches the size of the first through hole 101, which can accurately limit and fix the float level gauge 11. At the same time, since the diameter of the first through hole 101 is smaller than the maximum size of the limiting plate 114, the limiting plate 114 can firmly abut against the upper surface of the well cover 1, preventing the float level gauge 11 from falling off or shifting due to water flow impact, vibration of the well cover 1 opening and closing, or its own weight, ensuring the stability of the level detection structure, avoiding data distortion caused by displacement of the detection component, and ensuring the reliability of level monitoring.

[0063] In some embodiments, the manhole cover 1 is also provided with a luminous plastic sheet 14. It is understood that the luminous plastic sheet 14 is a special type of plastic sheet that can absorb light during the day and release light of a specific wavelength at night to form a weak luminous effect. The luminous plastic sheet 14 provides illumination and can be used as a safety warning sign.

[0064] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0065] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0066] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0067] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" of the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0068] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0069] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A manhole cover assembly for a hydropower station shaft, wherein the hydropower station shaft is located on the ground, characterized in that, The manhole cover assembly includes: The manhole cover is provided inside the vertical shaft of the hydropower station, and the annular support plate is connected to the inner wall of the vertical shaft of the hydropower station. The manhole cover is located inside the vertical shaft of the hydropower station and is situated on the annular support plate. A flip-top mechanism is provided on the ground and adjacent to the vertical shaft of the hydropower station. The flip-top mechanism includes a fixed base plate, a first fixed side plate, a second fixed side plate, a drive shaft, and a flipping arm. The first and second fixed side plates are spaced apart in the left-right direction. One end of the drive shaft is rotatably connected to the first fixed side plate, and the other end of the drive shaft is rotatably connected to the second fixed side plate. One end of the flipping arm is connected to the drive shaft, and the other end of the flipping arm is connected to the manhole cover. A drive motor is provided on the fixed base plate. The drive end of the drive motor is connected to the drive shaft to drive the drive shaft to rotate, thereby driving the tilting arm to rotate around the drive shaft.

2. The manhole cover assembly according to claim 1, characterized in that, The drive end of the drive motor is provided with a worm gear, and the drive shaft is provided with a worm wheel, and the worm wheel and the worm gear mesh with each other.

3. The manhole cover assembly according to claim 1, characterized in that, The device comprises two tilting arms, which are spaced apart in the left-right direction. The two tilting arms are designated as a first tilting arm and a second tilting arm. The other end of the first tilting arm is provided with a first connecting member, and the other end of the second tilting arm is provided with a second connecting member. The manhole cover is provided with a third connector corresponding to the first connector and a fourth connector corresponding to the second connector. The third connector is connected to the first connector via a first fastener, and the fourth connector is connected to the second connector via a second fastener.

4. The manhole cover assembly according to claim 3, characterized in that, The first connector has a first groove, and part of the third connector fits into the first groove. The first connector has a first connecting hole that communicates with the first groove. The third connector has a third connecting hole corresponding to the first connecting hole. The first fastener passes through the first connecting hole and the third connecting hole. The second connector has a second groove, and part of the fourth connector fits into the second groove. The second connector has a second connecting hole that communicates with the second groove. The fourth connector has a fourth connecting hole corresponding to the second connecting hole. The second fastener passes through the second connecting hole and the fourth connecting hole.

5. The manhole cover assembly according to claim 1, characterized in that, The outer side surface of the first fixed side plate is provided with a first movable wheel, and the outer side surface of the second fixed side plate is provided with a second movable wheel; The fixed base plate is also provided with a third fixed side plate. One end of the third fixed side plate is connected to the end of the first fixed side plate away from the hydropower station shaft, and the other end of the third fixed side plate is connected to the end of the second fixed side plate away from the hydropower station shaft. The flip-top mechanism also includes a flip-top manhole cover, which is rotatably connected to the side of the third fixed side plate away from the hydropower station shaft.

6. The manhole cover assembly according to claim 1, characterized in that, It also includes a water-filled ball, which is located below the annular support plate and abuts against the annular support plate, and is connected to the inner wall of the hydropower station shaft; there are multiple water-filled balls, which are spaced apart circumferentially on the inner wall of the hydropower station shaft; each water-filled ball is equipped with a sealing safety valve.

7. The manhole cover assembly according to claim 1, characterized in that, It also includes a support block, which is located below the annular support plate and abuts against the annular support plate. The support block is also connected to the inner wall of the hydropower station shaft. There are multiple support blocks, which are spaced apart on the circumferential surface of the inner wall of the hydropower station shaft.

8. The manhole cover assembly according to claim 1, characterized in that, It also includes a filter plate, which is installed inside the vertical shaft of the hydropower station and is located between the annular support plate and the manhole cover; The filter plate includes an annular fixing member and a filter screen disposed within the annular fixing member. The upper surface of the annular fixing member is provided with a positioning hole, and the lower surface of the manhole cover is provided with a positioning rod corresponding to the positioning hole.

9. The manhole cover assembly according to claim 1, characterized in that, The manhole cover is provided with a first annular groove, and a first support column is provided in the first annular groove. One end of the first support column is connected to one side wall of the first annular groove, and the other end of the first support column is connected to the other side wall of the first annular groove.

10. The manhole cover assembly according to claim 1, characterized in that, It also includes a float level gauge, which includes a detection body, a detection rod, and a detection float. The detection rod is located at the lower end of the detection body, and the detection float is slidably mounted on the detection rod. A limiting plate is provided on the detection body. The manhole cover is provided with a first through hole, and the filter screen is provided with a second through hole corresponding to the first through hole; the diameter of the first through hole is smaller than the maximum size of the limiting plate.

Images