A butterfly-shaped top cover type steel gate for hydraulic engineering

Abstract

The application provides a water conservancy engineering butterfly-shaped top cover type steel gate which is installed at the outlet side of a shield well and comprises a steel gate and a plurality of guide columns which are embedded in a civil foundation, the steel gate is filled with a floating body filler, the floating body filler is made of a non-water absorbing material, the edge of the steel gate is connected to the guide columns through a plurality of guide shaft sleeves so as to guide the steel gate to climb or descend, and a limiting structure is arranged at the top end of the guide column to prevent the steel gate from being separated from the guide column when the steel gate climbs. The application has the advantages that the water discharged from the pump station can be smoothly discharged into a river, the reverse flow of silt can be effectively prevented, and the river landscape is not affected.

Description

Technical Field

[0001] This invention relates to the field of gate structure technology for water conservancy projects, specifically to a butterfly-shaped top cover type steel gate for water conservancy projects. Background Technology

[0002] With the increasing frequency of extreme weather events globally, urban flooding occurs frequently. The construction of urban flood control and drainage facilities in my country is relatively lagging behind, and the disaster losses caused by urban flooding are becoming increasingly severe.

[0003] To effectively solve the problem of urban flooding, constructing drainage pumping stations to forcefully drain water from inland rivers is a commonly used solution.

[0004] Under normal circumstances, water discharged by pumping stations can be directly discharged into rivers through waterways or culverts. However, some areas lack the conditions to implement such solutions due to various practical issues such as cultural relic protection and policy handling. Furthermore, setting the elevation of the tunnel outlet too high will affect the river landscape, while setting it too low will lead to problems such as silt backflow from the river causing tunnel blockage. Summary of the Invention

[0005] The purpose of this invention is to provide a butterfly-shaped steel gate for water conservancy projects that can ensure the smooth discharge of water from pumping stations into rivers, effectively prevent backflow of silt, and not affect the river landscape.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: A butterfly-shaped top cover steel gate for water conservancy projects is installed on the outlet side of a shield tunnel. It includes a steel gate and several guide columns embedded in the civil engineering foundation. The steel gate is filled with a non-absorbent floating material. The edge of the steel gate is connected to the guide columns through several guide shafts to guide the steel gate to climb or descend. A limiting structure is provided at the top of the guide column to prevent the steel gate from detaching from the guide column when climbing.

[0007] Furthermore, the steel gate includes an upper base plate and a lower base plate, with vertical reinforcing plates evenly distributed between the upper and lower base plates. Circular holes are opened on the reinforcing plates to reduce weight, and a ring of stiffening plates is provided around the circular holes in the reinforcing plates for reinforcement.

[0008] Furthermore, a water-stop structure is provided at the bottom of the steel gate to reduce vibration and provide a sealing effect when the steel gate is closed.

[0009] Furthermore, the bottom of the steel gate has a streamlined design to ensure the flow pattern of water during discharge.

[0010] Furthermore, a reasonable gap is provided between the guide post and the guide shaft to prevent jamming.

[0011] Furthermore, the guide post has a pipe structure and can be used as a vent.

[0012] Compared with the prior art, the present invention has the following advantages: This invention relates to a butterfly-shaped top-cover steel gate for water conservancy projects. It ensures the smooth discharge of water from pumping stations into rivers while effectively preventing silt backflow and preserving the river landscape. Specifically, the steel gate moves up and down along guide columns through the impact of water flow, resulting in energy efficiency, environmental friendliness, and high flexibility in opening and closing. The gate eliminates the need for additional opening and closing equipment, saving on investment in a gatehouse and subsequent maintenance costs. The internal float filler is a non-absorbent medium, increasing buoyancy and preventing problems caused by leakage. It effectively prevents silt backflow into the tunnel boring machine after the gate is closed. The streamlined design at the bottom of the gate ensures optimal water flow during discharge, creating a continuous fountain effect with high aesthetic appeal. Attached Figure Description

[0013] Figure 1 This is the overall top view of the engineering layout of the present invention.

[0014] Figure 2 yes Figure 1 Schematic diagram of section II.

[0015] Figure 3 yes Figure 1 Schematic diagram of section II-II (gate closed).

[0016] Figure 4 yes Figure 1 Schematic diagram of section III-III (gate closed).

[0017] Figure 5 yes Figure 1 Schematic diagram of section II-II (gate fully open).

[0018] Reference numerals in the attached drawings: 1.1-Steel gate; 1.2-Float filler; 1.3-Guide shaft; 2-Limiting structure; 3-Guide column; 4-Civil engineering foundation. Detailed Implementation

[0019] The embodiments of the present invention will now be described in further detail with reference to the accompanying drawings.

[0020] A type of butterfly-shaped top cover steel gate for water conservancy projects, such as Figure 1 , 2As shown, the shield tunnel is installed on the outlet side and includes a steel gate 1.1 and several guide columns 3 embedded in the civil engineering foundation 4. The steel gate 1.1 is filled with a floating filler 1.2, which is made of a non-absorbent material. The edge of the steel gate 1.1 is connected to the guide columns 3 through several guide shafts 1.3 to guide the steel gate 1.1 to climb or descend. The top of the guide column 3 is provided with a limiting structure 2 to prevent the steel gate 1.1 from detaching from the guide column 3 due to excessive water flow impact when climbing, thus ensuring the reliability of the steel gate 1.1.

[0021] Preferably, there are four guide shafts 1.3 evenly distributed on the outer ring edge of the steel gate 1.1, and the guide shafts 1.3 are welded to the edge of the steel gate 1.1; correspondingly, there are four guide columns 3, which are pre-embedded in the civil engineering foundation 4 and are sleeved one-to-one with the guide shafts 1.3.

[0022] The steel gate 1.1 includes an upper base plate and a lower base plate. Vertical reinforcing plates are evenly distributed between the upper and lower base plates. Circular holes are made in the reinforcing plates to reduce weight, and a ring of stiffening plates is set around the inner circle of the reinforcing plates for reinforcement. The empty space between the reinforcing plates is filled with non-absorbent floating filler 1.2, which can both increase the buoyancy of the steel gate 1.1 and avoid many problems caused by leakage of the steel gate 1.1 later. The amount of floating filler 1.2 should be moderate to ensure that the steel gate 1.1 can be reliably closed without leakage under normal water level at the outlet side, so as to prevent silt from entering the shield tunnel.

[0023] The bottom of the steel gate 1.1 is equipped with a water-stop structure, which reduces vibration and provides a sealing effect when the steel gate 1.1 is closed.

[0024] The bottom of the steel gate 1.1 has a streamlined design to ensure the flow pattern of water when it is discharged.

[0025] A reasonable gap is provided between the guide post 3 and the guide shaft 1.3 to prevent jamming. The guide post 3 has a pipe structure and can also serve as a vent.

[0026] The working principle of this invention is as follows: When the pumping station is draining water, the normal water level at the inlet of the shield tunnel continuously rises, creating a significant water level difference with the normal water level at the outlet. Under the influence of gravity, the water flows through the long shield tunnel, converting its gravitational potential energy into kinetic energy, and is ejected upwards at the outlet. The steel gate 1.1, under the powerful impact of the water flow, "climbs" upwards along the guide column 3 via the guide shaft 1.3. The extreme position of this "climbing" is as follows... Figure 5 As shown, the steel gate 1.1, after "climbing", forms gaps around it to allow water to spray out, achieving the purpose of drainage with a fountain effect.

[0027] After the pumping station finishes draining the water, the water level at the inlet of the tunnel boring machine (TBM) gradually drops to its normal level. The water level difference between the inlet and outlet sides gradually diminishes. As the water flows through the long tunnel under gravity, its kinetic energy decreases until it reaches the outlet. During this process, the steel gate 1.1, due to the gradually weakening impact of the water flow, slowly descends along the guide column 3 under its own weight, eventually reaching the normal level. Figure 3 , 4 The indicated off state. Figure 2 As shown, after the steel gate 1.1 is closed, the entire structure is below the normal water level on the outer river side. The guide column 3 exposed above the water surface can serve as a warning to passing ships. In this state, in order to prevent the silt on the outer river side from continuously flowing back into the shield tunnel under the action of water flow, an effective water-stopping structure needs to be installed at the bottom of the steel gate 1.1. The water-stopping structure can also play a role in reducing vibration when the steel gate 1.1 is closed.

[0028] Therefore, the steel gate 1.1 can automatically open by "climbing" along the guide column 3 embedded in the civil engineering foundation 4 with the help of water flow impact. After opening, it can form a spectacular fountain effect with strong ornamental value. After the water flow impact ends, the steel gate 1.1 closes by descending along the guide column 3 with its own weight. It is energy-saving, environmentally friendly, and flexible in opening and closing.

[0029] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several improvements and modifications without departing from the concept of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A butterfly-shaped top cover type steel gate for water conservancy projects, installed on the outlet side of a shield tunnel shaft, characterized in that: It includes a steel gate and several guide columns embedded in the civil engineering foundation. The steel gate is filled with a non-absorbent material. The edge of the steel gate is connected to the guide columns through several guide shafts to guide the steel gate to climb or descend. A limiting structure is set at the top of the guide column to prevent the steel gate from detaching from the guide column when climbing.

2. The butterfly-shaped top cover steel gate for water conservancy projects according to claim 1, characterized in that: The steel gate includes an upper base plate and a lower base plate. Vertical reinforcing plates are evenly distributed between the upper base plate and the lower base plate. Circular holes are opened on the reinforcing plates to reduce weight. A ring of stiffening plates is set around the circular holes in the reinforcing plates for reinforcement.

3. A butterfly-shaped top cover steel gate for water conservancy projects according to claim 1 or 2, characterized in that: The bottom of the steel gate is equipped with a water-stop structure, which reduces vibration and provides a sealing effect when the steel gate is closed.

4. A butterfly-shaped top cover steel gate for water conservancy projects according to claim 3, characterized in that: The bottom of the steel gate has a streamlined design to ensure the flow pattern of water when it is discharged.

5. A butterfly-shaped top cover steel gate for water conservancy projects according to claim 1, characterized in that: A reasonable gap is set between the guide post and the guide shaft to prevent jamming.

6. A butterfly-shaped top cover steel gate for water conservancy projects according to claim 1 or 5, characterized in that: The guide post has a pipe structure and can be used as a vent.

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