Tail water maintenance platform suitable for high seismic acceleration area

Abstract

The invention provides a tail water maintenance platform suitable for a high earthquake acceleration area, and relates to the technical field of water conservancy and hydropower engineering metal structures, the arrangement elevation of the tail water maintenance platform is above the full water level of a unit, a bent frame or retaining wall structure is arranged on the tail water maintenance platform, and a hoist is arranged at the top end of the bent frame or retaining wall structure. A rail system is arranged under the hoist, and a gate is movably arranged on the rail system. The rail system comprises a horizontal transverse rail and a lifting rail which is obliquely arranged towards the waterside, and a traction device is arranged at the top end of the lifting rail; the two sides of the gate are provided with guide wheels correspondingly matched with the transverse track and the lifting track respectively, and a lifting ring is arranged on the rear flange of the gate main beam. The design difficulty and the engineering investment of the tail water maintenance platform are reduced, and the risk caused by collapse of a high-rise structure in a high earthquake area is greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of metal structures of water conservancy and hydropower engineering, in particular to a tailwater maintenance platform suitable for areas with high seismic acceleration. Background Art

[0002] In current engineering technology, flat gates are generally installed vertically and locked to a load-bearing platform at a specific elevation at the top of the gate slot. If the locking platform is located between the full discharge level and the flood level, high-velocity water flow will create impact loads on the gates when a flood exceeds the tailwater level, causing the maintenance platform to exceed the maintenance platform. Conventional protection measures require the installation of a gate locking platform (which also serves as a tailwater platform) above the flood level, accompanied by a high-rise hoist frame structure to ensure stable gate operation. The tailwater gate maintenance platform is also typically located at this elevation to facilitate equipment maintenance. However, in hydropower projects located in areas of high seismic intensity and with high design earthquake acceleration, the need for a high-rise hoist frame structure places stringent demands on the seismic performance and overall stability of the structure, significantly increasing the complexity of the structural design and project investment costs. If the maintenance platform is lowered to a position between the full discharge level and the flood level, the current vertically mounted gates will directly bear the impact loads of the dynamic water during floods, posing a risk of structural damage and jeopardizing the overall operational safety of the power station. Therefore, a new type of rack structure is urgently needed. Summary of the Invention

[0003] The present invention provides a tailwater maintenance platform suitable for areas with high seismic acceleration, with the aim of solving at least one technical problem existing in the prior art mentioned in the background technology.

[0004] The present invention provides the following technical solutions to achieve the above objectives: A tailwater maintenance platform suitable for areas with high seismic acceleration, wherein the tailwater maintenance platform is set at an elevation above the full water level of the unit, and a rack or retaining wall structure is provided on the tailwater maintenance platform, a gate hoist is provided at the top of the rack or retaining wall structure, a track system is provided directly below the gate hoist, and a gate is movably provided on the track system; the track system includes a horizontally arranged transverse track and a lifting track arranged inclined toward the water surface, and a traction device is provided at the top of the lifting track; guide wheels corresponding to the transverse track and the lifting track are provided on both sides of the gate, and a lifting ring is provided on the rear flange of the gate main beam.

[0005] Furthermore, a protective cover is provided on the outside of the gate hoist.

[0006] Furthermore, the guide wheel is connected to the gate through a slider, and a guide wheel mounting hand hole is provided on the gate, and guide wheel mounting holes are provided on both sides of the gate.

[0007] Furthermore, a locking device is also provided on the tailwater inspection platform.

[0008] Furthermore, the top elevation of the lifting track is set to be equal to the top elevation of the transverse track.

[0009] Compared with the prior art, the present invention has the following beneficial effects: 1. Reduced design difficulty and improved reservoir operation safety: This technology reduces the height of the bent frame, avoiding the increased construction costs associated with increasing the height. Furthermore, the reduced height reduces the difficulty of bent frame design, sometimes eliminating the need for design, significantly reducing the risk of collapse of tall structures in high-seismic regions.

[0010] 2. Improve gate stability: This technology sets tracks on the civil structures on both sides of the gate and installs a traction device above the inclined track. When a flood comes, the gate can be towed from a vertical state to a horizontal state through the opening and closing device, thereby preventing the gate from being washed away by the flood and improving the stability of the gate.

[0011] 3. Adapt to hydropower station projects with high seismic intensity and large seismic acceleration: This technical solution is particularly suitable for hydropower station projects with high seismic intensity and large seismic acceleration. Its design takes into account the impact of earthquakes on the hoist frame of the hydropower station. By lowering the height of the frame and the height of the tailwater maintenance platform, and setting up tracks and hoisting devices, the overall structure is made more stable and can better adapt to the impact and changes brought about by earthquakes. 4. Improve the safety of gates during storage: The application of this technology can effectively prevent the impact on the gate when the tailwater level exceeds the full water level of the unit, thereby improving the safety of the hydropower station. At the same time, due to the improvement of the entire structure, the hydropower station can better respond and adjust when facing floods, thereby further improving the safety of the hydropower station. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the gate of the present invention being locked on the tailwater platform; Figure 3 It is a front view schematic diagram of the gate structure of the present invention; Figure 4 It is a schematic side view of the gate structure of the present invention; Figure numerals: 1-retaining wall structure; 2-hoist; 3-protective cover; 4-track system; 5-traction device; 6-guide wheel; 7-guide wheel mounting hole; 8-guide wheel mounting hand hole; 9-slider; 10-lifting ring. DETAILED DESCRIPTION

[0013] To facilitate understanding of the present invention, the present application will be described more comprehensively below with reference to the relevant drawings; the drawings show preferred embodiments of the present invention, but the present invention can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, the purpose of providing these embodiments is to enable a more thorough and comprehensive understanding of the disclosed content of the present invention.

[0014] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are for illustrative purposes only and do not represent the only implementation method.

[0015] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains; the terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more of the associated listed items.

[0016] Example. A tailwater maintenance platform suitable for high seismic acceleration areas, with a structure reference Figure 1 and 2 The tailwater maintenance platform is set at an elevation above the full water level of the unit (the specific elevation must ensure that when the gate is locked on the tailwater maintenance platform, the lower structure of the gate is not affected by the impact of the water flow). A rack or retaining wall structure 1 is provided on the tailwater maintenance platform, and a gate hoist 2 is provided at the top of the rack or retaining wall structure. A track system 4 is provided directly below the gate hoist 2, and a gate is movably provided on the track system 4; the track system 4 includes a horizontally arranged transverse track and a lifting track inclined toward the water surface, and a traction device 5 is provided at the top of the lifting track; guide wheels 6 corresponding to the transverse track and the lifting track are provided on both sides of the gate, and a lifting ring 10 is provided on the rear flange of the gate main beam; a protective cover 3 is provided on the outside of the gate hoist 2; the guide wheel 6 is connected to the gate through a slider 9, and a guide wheel mounting hand hole 8 is provided on the gate, and guide wheel mounting holes 7 are provided on both sides of the gate; a locking device is also provided on the tailwater maintenance platform, and the top elevation of the lifting track is set equal to the top elevation of the transverse track.

[0017] The top elevation of the lifting track and the transverse track is set higher than the design flood level elevation to ensure that the gate is not affected by flood impact when stored on the track system 4.

[0018] The guide wheel 6 is detachable, with guide wheel mounting holes 7 and hand holes 8 for easy removal and installation. A support shaft passes through the guide wheel mounting hole 7 and connects to the gate side beam web. The shaft end has a threaded structure and is secured to the gate side beam web via a nut. A slider 9 is provided on the load-bearing side of the gate. When in the water-retaining state, the slider transmits water pressure to the gate slot and civil engineering structure, while the guide wheel is not subjected to water pressure.

[0019] The present invention uses the following method: When a flood strikes the tailwater gate, the gate is hoisted to the tailwater inspection platform via the gate hoist 2. The guide wheels 6 are connected to the transverse track and the lifting track, respectively. The traction device 5 at the top of the lifting track is connected to the lifting ring on the rear flange of the gate main beam. The traction device 5 is activated to cause the bottom end of the gate to move diagonally on the lifting track, ultimately making the gate horizontal or tilted, completing the gate storage. Under normal circumstances, the gate is in a vertical position with its waist locked above the gate slot. The gate lower structure is located in the gate slot, and the gate bottom is above the full water level, ensuring that the gate is not impacted by the power generation tailwater flow. At the same time, the lower structure is located in the gate slot, providing the gate with sufficient stability to cope with earthquake conditions.

[0020] Obviously, the above is only a partial embodiment of the present invention, not all embodiments. The above embodiments are not intended to limit the present invention. For those skilled in the art, the present invention can be modified and varied in various ways. Any combination, modification, equivalent replacement, improvement, and other embodiments that can be made by those of ordinary skill in the art within the spirit and principles of the present invention shall be within the scope of protection of the present invention.

Claims

1. A tailwater inspection platform suitable for areas with high seismic acceleration, characterized by: The tailwater inspection platform is set at an elevation above the full water level of the unit. A rack or retaining wall structure is provided on the tailwater inspection platform. A gate hoist is provided at the top of the rack or retaining wall structure. A track system is provided directly below the gate hoist, and a gate is movably provided on the track system. The track system includes a horizontally arranged transverse track and a lifting track inclined toward the water surface, and a traction device is provided at the top of the lifting track. Guide wheels corresponding to the transverse track and the lifting track are provided on both sides of the gate, and a lifting ring is provided on the rear flange of the gate main beam.

2. The tailwater maintenance platform suitable for high seismic acceleration areas according to claim 1 is characterized by: A protective cover is provided on the outside of the hoist.

3. The tailwater maintenance platform suitable for high seismic acceleration areas according to claim 1 is characterized by: The guide wheel is connected to the gate through a slider. The gate is provided with a guide wheel mounting hand hole, and guide wheel mounting holes are provided on both sides of the gate.

4. The tailwater maintenance platform suitable for high seismic acceleration areas according to claim 1 is characterized by: The tailwater maintenance platform is also provided with a locking device.

5. The tailwater maintenance platform suitable for high seismic acceleration areas according to claim 1 is characterized by: The top elevation of the lifting track is set to be equal to the top elevation of the transverse track.

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