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Self-supplementing gas energy dissipation method and device in cave

A technology of energy dissipation device and flood discharge tunnel, which is applied in water conservancy engineering, marine engineering, coastline protection and other directions, can solve the problems of large amount of ventilation wells, difficult construction, damage to the ecological environment, etc., to achieve stable water flow, increase construction difficulty, engineering volume reduction effect

Inactive Publication Date: 2011-12-14
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Excavating ventilation wells from the top of the water outlet tunnel to the surface of the mountain is a large amount of work. It is difficult to dig a well on the top of the mountain, and it will damage the ecological environment at the same time, so it is not an ideal solution.

Method used

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  • Self-supplementing gas energy dissipation method and device in cave
  • Self-supplementing gas energy dissipation method and device in cave
  • Self-supplementing gas energy dissipation method and device in cave

Examples

Experimental program
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Effect test

Embodiment 1

[0038] This embodiment is a self-supplementing energy dissipation device in a cave, such as figure 1 shown. This embodiment includes: the entrance of the flood discharge tunnel, the entrance of the flood discharge tunnel is connected to the top of the connecting well, the bottom of the connecting well is connected to the water outlet tunnel rebuilt from the gate-shaped diversion tunnel, and the inlet section in the water outlet tunnel A water-blocking pier is provided, and the water-blocking pier is provided with a ventilation pipe that can guide the air-water mixed flow at the top of the water outlet hole to the water surface behind the water-blocking pier. When the water flow passes through the connecting well, a large amount of air will be carried, or a large amount of air will be mixed in the water to prepare for the energy dissipation of the water blocking pier in the outlet tunnel.

[0039] The connection well described in this embodiment is a transitional section conne...

Embodiment 2

[0047] This embodiment is the improvement of the first embodiment, and it is the refinement of the first embodiment about the water blocking pier. The water-blocking pier described in this embodiment is one of a raised ridge, a side pier, a pressing plate, a composite pier and a dispersed composite pier.

[0048] The structure of the pier see figure 1 , 2 , 3, in the figure A is the flow direction. The side pier 1 described in this embodiment is a general term for two water blocking piers symmetrically arranged on the two side walls of the water outlet hole 2 . Usually, side piers appear in pairs. The shape of the horizontal section of the side pier (section parallel to the horizontal plane) is approximately triangular, such as image 3 shown. In appearance, it looks like two symmetrical vertical piers on both sides of the water outlet (such as figure 2 ), using the sudden expansion of the side pier outlet to dissipate energy. The included angle θ=(20°~30°) between the...

Embodiment 3

[0055] This embodiment is an improvement of Embodiment 1, and it is a refinement of Embodiment 1 about the connecting well and the water blocking pier. The connecting well described in this embodiment is an open flow inclined well, and the described water blocking pier is an open The upstream side pier at the front end of the reverse arc section of the flow-inclined well, the ridge at the rear end of the reverse-arc section of the flow-inclined well, and the downstream side pier arranged downstream of the ridge.

[0056] This embodiment is an improvement on the arrangement of aeration tanks under traditional inclined shafts, and is a refinement of Embodiment 1 on connecting wells and corresponding water cushion ponds (that is, the submerged water cushion formed upstream of the water blocking pier in the water outlet tunnel), such as Figure 15 shown. The connection well 802 described in this embodiment is an open flow inclined well, and the water cushion pond refers to the sub...

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Abstract

The invention relates to an in-tunnel self-air supply energy dissipation method and device, to a water conservation method and device. The device comprises a sluice tunnel inlet, wherein the sluice tunnel inlet is connected with the top end of a junction chamber; the bottom of the junction chamber is connected with an effluent tunnel; and water blocking piers are arranged in the junction chamberand the effluent tunnel and can be used for guiding gas-water mixed flow on the top of the effluent tunnel to vent pipes on the back sides of the water blocking piers. According to the invention, vent pipes are arranged in various baffle piers, and self-air-doping is performed by sucking the gas-water mixed flow on the top of the effluent tunnel under the action of the negative pressures of the back sides of the baffle piers, so that negative pressures of back sides of edge piers, combined piers or pressure plates and the like are effectively reduced, an energy dissipation effect is achieved,water current in a tunnel is stable, the baffle piers have simple structure and are easy to manufacture, the work amount is reduced greatly, and the construction cost is lowered greatly.

Description

technical field [0001] The invention relates to a method and device for self-supplementing energy in a cave, which is a hydraulic method and device, and an energy dissipation method and device for a swirl shaft flood discharge tunnel in a water outlet tunnel. Background technique [0002] The method of converting the diversion tunnel in the dam construction into a flood discharge tunnel saves labor and funds, and the construction difficulty is relatively small. It is a construction design method that is quicker and more economical. For example, the Chinese patent application "A Flood Discharge Method and Device for Anti-corrosion and Energy Dissipation of Swirling Annular Weirs" (Application No. 200910089562.7) proposes a swirling annular weir shaft flood discharge tunnel, which can avoid cavitation erosion of overflow weirs and shafts, and discharge floods and dissipate water. The energy effect is good, there is no atomization phenomenon in the downstream of the outlet, and...

Claims

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Application Information

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IPC IPC(8): E02B8/06
Inventor 董兴林杨开林郭新蕾郭永鑫王涛付辉贾顺钟
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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