Metal structure for improving reliability of flood discharge deep hole and hydraulic structure

Abstract

This invention belongs to the field of water conservancy and hydropower engineering technology, and relates to a metal structure and hydraulic structure for improving the reliability of deep flood discharge orifices. The metal structure, along the water flow direction of the deep flood discharge orifice, sequentially includes a protective frame slot, an emergency gate slot, and a working gate slot. The elevation of the embedded part at the bottom sill of the protective frame slot is lower than that of the embedded part at the bottom sill of the emergency gate slot, but the same as the solid height of the bottom of the protective frame. The protective frame is a concave hollow structure with waterstops around the bottom and elastic support structures on the sides. Secondary concrete within the slot is poured using smooth steel molds and formwork paint. Normally, the protective frame is placed within the slot to ensure a smooth flow path and eliminates the metal-concrete interface. In case of damage to the emergency gate slot, the protective frame can be removed and placed into the maintenance gate, providing waterless maintenance conditions. This invention reduces the risk of impact damage to the embedded parts of the metal structure slots, improves flow patterns, reduces water seal wear, increases maintenance efficiency and economy, and ensures the reliable operation of the deep flood discharge orifice.

Description

Technical Field

[0001] This invention relates to a metal structure and hydraulic structure for improving the reliability of deep flood discharge holes, belonging to the field of water conservancy and hydropower engineering technology. Background Technology

[0002] In the field of metal structures and hydraulic structures for water conservancy and hydropower projects, the operation of spillway systems is complex and faces numerous challenges. Especially in high-head, high-impurity hydropower projects, the extremely high flow velocity when the gates are opened generates a powerful impact on related structures. Furthermore, the presence of gate slots in the spillway can disrupt the flow pattern in the flood discharge and sediment flushing channels.

[0003] Under such harsh operating conditions over a long period, the joint between the hydraulic structure and the embedded metal structure is highly susceptible to damage. This damage can then lead to deformation of the embedded metal structure, ultimately preventing the gate from closing completely and severely impacting the normal operation and safety of the drainage system.

[0004] Currently, to ensure the reliability of the working gates of spillway structures, emergency gates or maintenance gates are often installed upstream to block water during maintenance of the working gates. However, the gate slot structure of the emergency gates or maintenance gates has become a new potential safety hazard in the spillway. Some solutions have attempted to add a maintenance gate slot upstream of the emergency gate, but this has not only failed to effectively solve the problem but has also increased potential risks.

[0005] In summary, the existing designs of deep-hole gate slot metal structures and hydraulic structures are insufficient to cope with the adverse effects of high-velocity water flow and complex flow patterns, and an innovative design solution is urgently needed. Summary of the Invention

[0006] In view of the technical problems existing in the prior art as pointed out in the background art, the present invention provides a metal structure and hydraulic structure for improving the reliability of deep flood discharge orifices. The present invention can improve the reliability of deep flood discharge orifices, reduce the risk of damage to the embedded parts of the metal structure gate slots by high-speed water flow, and provide waterless maintenance conditions for emergency gates and working gates, thereby ensuring the safe and stable operation of water conservancy and hydropower projects.

[0007] The technical solution of the present invention is a metal structure for improving the reliability of flood discharge deep holes, comprising a protective frame groove, an emergency gate groove, and a working gate groove arranged sequentially in the direction of water flow in the flood discharge deep hole; the elevation of the bottom sill embedded part of the protective frame groove is lower than the elevation of the bottom sill embedded part of the emergency gate groove, and the resulting height difference H is the same as the bottom solid height of the protective frame, and the bottom solid height of the protective frame groove is the same as the bottom elevation of the flow channel.

[0008] Preferably, the protective frame is a concave hollow structure, the bottom solid height of which is the same as the depth of the groove in the protective frame, so that the bottom height of the concave hollow structure is the same as the bottom elevation of the flow channel; the two sides of the concave structure are provided with a side beam structure, the height of which is not lower than the height of the orifice; the bottom of the concave hollow structure is provided with a water-stopping device around its perimeter, and the sides are provided with an elastic support structure.

[0009] Preferably, the secondary concrete surface inside the protective frame groove is smooth and flat, and is poured using a smooth and flat steel mold, with formwork paint used as a release agent.

[0010] Preferably, the protective frame is placed inside the protective frame groove under normal circumstances, and the protective frame fills the recessed grooves on both sides and bottom of the protective frame groove, so that the flow channel is smooth and complete.

[0011] Preferably, the protective frame has no embedded metal structure and no interface between the metal structure and the concrete.

[0012] Preferably, if the gate slot of the emergency gate is damaged, the protective frame is lifted out of the opening through the opening and closing device, and the maintenance gate is placed into the protective frame slot, so as to provide waterless maintenance conditions for the gate slot of the emergency gate.

[0013] Preferably, the elastic support structure consists of a high-strength spring and a shock-absorbing rubber pad.

[0014] Preferably, the thickness of the secondary concrete is 600 mm.

[0015] A hydraulic structure comprising the aforementioned metal structure for improving the reliability of deep-hole flood discharge.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention, through its structural design of sequentially arranging a protective frame groove, an emergency gate groove, and a working gate groove in the direction of water flow in the flood discharge deep hole, effectively reduces the risk of damage to the embedded parts of the metal structure gate grooves caused by high-speed water flow. The elevation of the embedded part at the bottom sill of the protective frame groove is lower than that of the embedded part at the bottom sill of the emergency gate groove, and the resulting height difference is the same as the height of the bottom solid of the protective frame. This ensures that when the working gate is opened for flood discharge, the protective frame and the flood discharge channel form a smooth transition, effectively reducing the impact force on the gate groove.

[0017] 2. This invention employs a concave hollow protective frame design, with the bottom solid height matching the depth of the protective frame's groove, ensuring that the bottom height of the concave hollow structure is the same as the bottom elevation of the flow channel. This design allows the protective frame to better match the flow channel, reducing abrupt changes in the flow channel, effectively improving the flow pattern of the flood discharge and sand flushing channel, and minimizing the impact on the flow pattern.

[0018] 3. The present invention uses a smooth and flat steel mold inside the protective frame groove and uses template paint as a release agent to ensure the smoothness of the secondary concrete surface, thereby reducing surface wear of the water seal structure while ensuring that the water seal structure of the protective frame is in close contact with the concrete surface.

[0019] 4. The protective frame of the present invention can be pulled out through the opening via the opening and closing device, which facilitates inspection and maintenance. At the same time, it also serves as the gate slot for the maintenance gate, providing waterless maintenance conditions for the emergency gate, which greatly improves maintenance efficiency and economy. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention; (the arrows in the diagram indicate the direction of water flow). Figure 2 This is a schematic diagram of the structure of the protective frame of the present invention; Figure 3 This is a front view schematic diagram of the protective frame structure of the present invention; Figure 4 This is a schematic diagram of the elastic support structure of the present invention; The markings in the attached diagram are: 1-protective frame groove, 2-emergency gate groove, 3-working gate groove, 4-water-stopping device, 5-elastic support structure, 6-smooth concrete surface. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0022] An example of a metal structure and hydraulic structure for improving the reliability of deep flood discharge orifices is described below, with structural reference as follows. Figure 1-4 As shown.

[0023] A metal structure for improving the reliability of flood discharge deep holes includes a protective frame groove 1, an emergency gate groove 2, and a working gate groove 3 arranged sequentially along the water flow direction of the flood discharge deep hole; the elevation of the bottom sill embedded part of the protective frame groove 1 is lower than the elevation of the bottom sill embedded part of the emergency gate groove 2, and the resulting height difference H is the same as the bottom solid height of the protective frame, and the bottom solid height of the protective frame groove 1 is the same as the bottom elevation of the flow channel.

[0024] The protective frame is a concave hollow structure, and the height of its bottom solid is the same as the depth of the groove 1 of the protective frame, so that the bottom height of the concave hollow structure is the same as the bottom elevation of the flow channel; a side beam structure is provided on both sides of the concave shape, and the height of the side beam structure is not lower than the height of the orifice; a water-stopping device 4 is provided around the bottom of the concave hollow structure, and an elastic support structure 5 is provided on the side.

[0025] The secondary concrete surface inside the protective frame groove 1 is smooth and flat. It is poured using a smooth and flat steel mold and formwork paint is used as a release agent.

[0026] Normally, the protective frame is placed inside the protective frame groove 1. The protective frame fills the recessed grooves on both sides and the bottom of the protective frame groove 1, making the flow channel smooth and complete.

[0027] The protective frame has no embedded metal structures and no interface between the metal structure and the concrete.

[0028] If the gate slot 2 of the emergency gate is damaged, the protective frame is pulled out of the opening through the opening and closing equipment, and the maintenance gate is placed into the protective frame slot 1 to provide waterless maintenance conditions for the gate slot 2 of the emergency gate.

[0029] The elastic support structure 5 consists of a high-strength spring and a shock-absorbing rubber pad.

[0030] The thickness of the second-phase concrete is 600mm.

[0031] A hydraulic structure comprising the aforementioned metal structure for improving the reliability of deep-hole flood discharge.

[0032] Using the above technology, in a high-head, high-impurity water conservancy and hydropower project, the metal structure and hydraulic structure that improved the reliability of the flood discharge deep hole were implemented using the above technology. The specific implementation is as follows: The metal structure is provided with a protective frame slot 1, an emergency gate slot 2, and a working gate slot 3 in sequence along the direction of water flow in the flood discharge deep hole.

[0033] The elevation of the bottom sill embedded part of the protective frame groove 1 is intentionally designed to be 0.5m lower than the elevation of the bottom sill embedded part of the emergency gate groove 2. This height difference is consistent with the bottom solid height of the protective frame, that is, the bottom solid height of the protective frame groove 1 is also 0.5m, and this bottom solid height is the same as the bottom elevation of the flow channel. This design allows high-speed water to pass through this area more smoothly when the working gate is opened for flood discharge, reducing the impact force on the gate groove.

[0034] The protective frame adopts a concave hollow structure with a bottom solid height of 0.5m, the same depth as the groove in the protective frame slot 1, ensuring that the bottom height of the concave hollow structure is consistent with the bottom elevation of the flow channel after being placed in the protective frame slot 1. Side beam-like structures are installed on both sides of the concave shape, with a height of 4m, higher than the height of the flood discharge orifice of the project, providing sufficient lateral support for the protective frame. Grooves are provided around the bottom of the concave hollow structure, on which water-stopping devices 4 are installed to effectively prevent water leakage. Four elastic support structures 5 are provided on the sides, each composed of a high-strength spring and a shock-absorbing rubber pad, which buffer and dampen the protective frame when it is impacted by water flow, while ensuring a tight fit between the protective frame and the surrounding structure.

[0035] When pouring the second-stage concrete within the protective frame groove 1, a smooth and flat steel mold was selected, and formwork paint was used as a release agent. The final thickness of the second-stage concrete was controlled to 600mm. This operation ensured that the surface of the second-stage concrete was smooth and flat, which not only allowed the water seal structure of the protective frame to fit tightly against the concrete surface, but also reduced surface wear on the water seal structure.

[0036] Under normal operating conditions, the protective frame is placed inside the protective frame groove 1, filling the sinkholes on both sides and the bottom of the groove. This allows the flow channel to maintain its original shape in that area, remaining smooth and intact, effectively reducing the adverse effects of water flow on the area and improving the flow pattern of the flood discharge and sand flushing channel. Furthermore, the protective frame has no embedded metal structures and no interface between the metal structure and concrete, avoiding the risk of damage caused by long-term water flow impact at the metal-concrete interface.

[0037] If the gate slot 2 of the emergency gate is damaged, the protective frame can be lifted out of the orifice using the on-site opening and closing equipment, and then the maintenance gate can be placed into the protective frame slot 1. This creates waterless maintenance conditions for the gate slot 2 of the emergency gate, greatly improving maintenance efficiency and economy, and ensuring the reliability of the entire flood discharge system.

[0038] As can be seen from this embodiment, the metal structure and hydraulic structure of the present invention effectively solve the problems existing in the prior art in practical engineering applications and significantly improve the reliability of flood discharge deep holes.

[0039] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A metal structure for improving the reliability of a deep flood discharge hole, characterized by: The system includes a protection frame groove (1), an emergency gate groove (2), and a working gate groove (3) arranged sequentially along the direction of water flow in the flood discharge deep hole. The elevation of the bottom sill embedded part of the protection frame groove (1) is lower than the elevation of the bottom sill embedded part of the emergency gate groove (2), and the resulting height difference H is the same as the bottom solid height of the protection frame. The bottom solid height of the protection frame groove (1) is the same as the bottom elevation of the flow channel.

2. The metal structure for improving reliability of a deep flood discharge hole according to claim 1, wherein: The protective frame is a hollow "concave" shaped structure. The height of its bottom solid is the same as the depth of the groove in the protective frame (1), so that the bottom height of the "concave" hollow structure is the same as the bottom elevation of the flow channel. The "concave" shape is provided with a side beam structure on both sides, and the height of the side beam structure is not lower than the height of the orifice. The bottom of the "concave" hollow structure is provided with a water-stopping device (4) around its perimeter, and an elastic support structure (5) is provided on its side.

3. The metal structure for improving reliability of a deep flood discharge hole according to claim 2, characterized in that: The surface of the secondary concrete in the protective frame groove (1) is smooth and flat. It is poured using a smooth and flat steel mold and template paint is used as a release agent.

4. The metal structure for improving reliability of a deep flood discharge hole according to claim 1, wherein: Normally, the protective frame is placed in the protective frame groove (1). The protective frame fills the sinkholes on both sides and bottom of the protective frame groove (1), making the flow channel smooth and complete.

5. The metal structure for improving reliability of a deep flood discharge hole according to claim 1, wherein: The protective frame has no embedded metal structures and no interface between the metal structure and the concrete.

6. The metal structure for improving reliability of a deep flood discharge hole according to claim 1, wherein: If the gate slot (2) of the accident gate is damaged, the protective frame is lifted out of the opening through the opening and closing device, and the maintenance gate is placed into the protective frame slot (1) to provide waterless maintenance conditions for the gate slot (2) of the accident gate.

7. The metal structure for improving reliability of a deep flood discharge hole according to claim 2, characterized in that: The elastic support structure (5) consists of a high-strength spring and a shock-absorbing rubber pad.

8. The metal structure for improving reliability of a deep flood discharge hole according to claim 3, characterized in that: The thickness of the second-phase concrete is 600mm.

9. A hydraulic structure, characterized in that: A metal structure comprising any one of claims 1-8 for improving the reliability of deep flood discharge orifices.

Images