Hydropower engineering bottom hole maintenance gate connecting cross beam

Abstract

A hydro-power engineering bottom hole maintenance gate connecting cross beam relates to the technical field of water conservancy and hydro-power engineering hydraulic structure overhaul and maintenance. The device comprises an upper cross beam, a middle cross beam and a lower cross beam, the upper cross beam, the middle cross beam and the lower cross beam are all of box structures, a plurality of buoyancy cavities are formed in the upper cross beam and the middle cross beam, a plurality of buoyancy cavities and three equipment cavities are formed in the lower cross beam, the three equipment cavities are arranged at equal intervals, and the buoyancy cavities are formed among the equipment cavities. The hydropower engineering bottom hole maintenance gate connecting cross beam is scientific in design and convenient to use, blocking gates at the two ends of a maintenance section are connected into a whole through the upper cross beam, the middle cross beam and the lower cross beam, buoyancy cavities are formed in the upper cross beam and the middle cross beam, the dead weight of the connecting cross beam in water is reduced, and the walking device is arranged in the lower cross beam. The position of the blocking gate is convenient to adjust, practicability is improved, and popularization is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic structure inspection and maintenance technology in water conservancy and hydropower projects, specifically providing a convenient-to-use maintenance and sealing gate for bottom holes in hydropower projects. Background Technology

[0002] With the vigorous development of water conservancy and hydropower projects in my country, tunnels such as spillway tunnels, sand flushing tunnels, and venting tunnels constructed along with these projects have experienced varying degrees of erosion damage after undergoing high-flow-rate water discharge and sand flushing operations since the projects began operation. To ensure the safety of these hydraulic structures, it is necessary to repair the damaged structures. If not handled properly, internal defects may continue to develop under continued water discharge and sand flushing operations, affecting project safety. Therefore, it is essential to repair these defective hydraulic structures. To provide dry construction conditions for the repair work, it is crucial to study scientific and reasonable plugging schemes.

[0003] Document CN 117367696 A discloses a test device and method for testing the sealing capacity of airbags in large-section tunnels. The device includes an airbag. According to the document, airbag sealing methods are widely used in sealing small pipelines or tunnels, but there is limited experience to draw upon both domestically and internationally for sealing large-scale tunnels. In sealing very large underwater tunnels, the airbag needs to overcome enormous reservoir water pressure. Increased external pressure necessitates high internal pressure in the airbag, and the material of the airbag and its sealing capacity cannot be tested to ensure effective sealing. The problems with this method are: 1. This method relies on the expansion of the airbag after being filled with high-pressure gas, resulting in close contact between the outer wall of the airbag and the inner wall of the tunnel. Under the pressure of the reservoir water, static friction is generated between the outer wall of the airbag and the inner wall of the tunnel to resist the reservoir water pressure. 1. After long-term operation, the inner surface of the tunnel becomes smooth, and its condition is difficult to assess, making it difficult to determine the static friction between the outer wall of the airbag and the inner wall of the tunnel; 2. Different projects have different tunnel shapes, and the airbag device can only be installed in the circular section of the tunnel to be sealed. It overcomes water pressure through the static friction between the outer wall of the airbag and the inner wall of the tunnel, so the airbag structure needs to be of sufficient length. This solution is difficult to adapt to different tunnel shapes; 3. The airbag device is huge, and its manufacturing quality and precision are difficult to guarantee. If air leakage occurs during sealing, the tunnel will not be able to be sealed, resulting in a major safety accident.

[0004] In water conservancy and hydropower projects, the metal structure layout of tunnels such as flood discharge tunnels, sand flushing tunnels, and venting tunnels is mostly as follows: an emergency plane gate is arranged at the beginning of the pressurized section of the tunnel, and an arc-shaped working gate is arranged at the end of the pressurized section of the tunnel. Therefore, it is possible to consider using the arc-shaped gate to block water as an auxiliary measure of the sealing equipment, and to seal the damaged location of the tunnel for maintenance through the sealing equipment. Summary of the Invention

[0005] The present invention aims to solve the problem of using airbags for sealing large-section tunnels, and provides a convenient connecting beam for the maintenance gate of the bottom hole in hydropower projects.

[0006] The utility model relates to a connecting beam for the maintenance gate of a hydropower project bottom hole. It is installed inside the tunnel, located on both sides of the maintenance section, and connected to the sealing gates upstream and downstream. The connecting beam is characterized by comprising an upper beam, a middle beam, and a lower beam. The upper beam, middle beam, and lower beam are all box structures. The upper beam and middle beam have several buoyancy cavities inside, and the lower beam has several buoyancy cavities and three equipment cavities inside. The three equipment cavities are equidistantly arranged, and the buoyancy cavities are set between the equipment cavities.

[0007] The equipment cavity is equipped with a walking device, which includes walking wheels, an underwater motor, a reducer, a brake, and a battery. The battery is placed inside the equipment cavity. The underwater motor is fixed to the bottom of the lower crossbeam and is connected to the battery via wires. The underwater motor, reducer, and walking wheels are connected in sequence. The underwater motor drives the walking wheels to rotate through the reducer. The brake is installed on the walking wheels.

[0008] The inner wall of the equipment cavity is provided with a waterproof silicone strip and a waterproof hole. The waterproof silicone strip is placed in the gap of the equipment cavity opening. The wires pass through the waterproof hole and connect to the storage battery and the underwater motor. A waterproof mesh is installed in the waterproof hole.

[0009] This utility model relates to a connecting beam for the maintenance gate at the bottom of a hydropower project. It is scientifically designed and easy to use. The upper, middle and lower beams connect the sealing gates at both ends of the maintenance section into a whole. The upper and middle beams are equipped with buoyancy cavities to reduce the weight of the connecting beams in the water. The lower beam is equipped with a walking device to facilitate the adjustment of the sealing gate position, improve practicality and facilitate promotion. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model.

[0011] Figure 2 This is a schematic diagram of the walking device structure of this utility model.

[0012] The components include: tunnel 1, sealing gate 2, upper crossbeam 3, middle crossbeam 4, lower crossbeam 5, buoyancy chamber 6, equipment chamber 7, traveling wheel 8, underwater motor 9, reducer 10, and storage battery 11. Detailed Implementation

[0013] Example 1: A connecting beam for the maintenance gate of the bottom hole of a hydropower project is installed inside the tunnel, located on both sides of the maintenance section, and connected to the sealing gates of the upstream and downstream. The connecting beam includes an upper beam, a middle beam and a lower beam. The upper beam, the middle beam and the lower beam are all box structures. The upper beam and the middle beam are provided with several buoyancy cavities. The lower beam is provided with several buoyancy cavities and three equipment cavities. The three equipment cavities are equidistantly arranged, and the equipment cavities are connected by buoyancy cavities.

[0014] The equipment cavity is equipped with a walking device, which includes wheels, an underwater motor, a reducer, a brake, and a battery. The battery is placed inside the equipment cavity, and the underwater motor is fixed to the bottom of the lower crossbeam. The underwater motor is connected to the battery via wires. The underwater motor, reducer, and wheels are connected sequentially, and the underwater motor drives the wheels to rotate through the reducer. The brake is installed on the wheels. The inner wall of the equipment cavity is equipped with waterproof silicone strips and waterproof holes. The waterproof silicone strips are placed in the gaps at the openings of the equipment cavity, and wires pass through the waterproof holes, connecting the battery and the underwater motor. Waterproof mesh is installed in the waterproof holes.

[0015] When in use, first connect the connecting beam to the upstream and downstream blocking gates, then move it to both sides of the section to be repaired. The two blocking gates are located upstream and downstream of the repair section, respectively. During the movement, the underwater motor drives the traveling wheels to move. After moving to the appropriate position, turn off the underwater motor and stop the traveling device with the brake. Then the repair work can be carried out on the section to be repaired.

Claims

1. A connecting beam for a maintenance gate at the bottom of a hydropower project, installed inside a tunnel, located on both sides of the maintenance section, and connected to the upstream and downstream sealing gates, characterized in that... The connecting beam includes an upper beam, a middle beam, and a lower beam. All three beams are box structures. The upper and middle beams have several buoyancy cavities inside, while the lower beam has several buoyancy cavities and three equipment cavities inside. The three equipment cavities are equidistant from each other, and the buoyancy cavities are located between the equipment cavities.

2. The connecting beam for the maintenance gate at the bottom of the hydropower project as described in claim 1, characterized in that... The equipment cavity is equipped with a walking device, which includes walking wheels, an underwater motor, a reducer, a brake, and a battery. The battery is placed inside the equipment cavity. The underwater motor is fixed to the bottom of the lower crossbeam and is connected to the battery via wires. The underwater motor, reducer, and walking wheels are connected in sequence. The underwater motor drives the walking wheels to rotate through the reducer. The brake is installed on the walking wheels.

3. The connecting beam for the maintenance gate at the bottom of the hydropower project as described in claim 1, characterized in that... The inner wall of the equipment cavity is provided with a waterproof silicone strip and a waterproof hole. The waterproof silicone strip is placed in the gap of the equipment cavity opening. The wires pass through the waterproof hole and connect to the storage battery and the underwater motor. A waterproof mesh is installed in the waterproof hole.

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