Bag plug system for plugging hydraulic tunnel

Abstract

The invention relates to a capsule plug system for plugging a hydraulic tunnel, and belongs to the technical field of sealing of hydraulic engineering. The system comprises a refrigerating machine arranged outside the hydraulic tunnel and a cylindrical water bag stuffed into the hydraulic tunnel. An evaporation pipe is wound on the surface of the water bag and a gap is formed between one circle of the surface of the water bag and the inner wall of the hydraulic tunnel; the water bag is filled with saline water; a refrigerant is injected into the evaporation pipe, and the evaporation pipe is connected with the refrigerating machine to form a closed circulation loop; when the system works, water in a gap between the surface of the water bag and the inner wall of the hydraulic tunnel freezes and forms a circle of annular tooth-shaped gap ice plug between the surface of the water bag and the inner wall of the hydraulic tunnel along with circulating flow of a refrigerant in the circulating loop, and water pressure is resisted through friction force between the gap ice plug and the inner wall of the hydraulic tunnel. Compared with a traditional hydraulic tunnel plugging method, the system can rapidly plug the hydraulic tunnel with low energy consumption.

Description

Technical Field

[0001] The invention relates to a bladder plug system for plugging a hydraulic tunnel, belonging to the technical field of sealing (E02B3 / 16) of hydraulic engineering. Background Art

[0002] Hydraulic tunnels are an important part of reservoir dams and are often used for multiple functions such as water diversion, drainage, and flood discharge. They are crucial to ensuring the safety, stability, and functionality of the dam. However, over time, the gates in the hydraulic tunnels may age, become damaged, or even fail to function properly, posing a hidden danger to the operation of the reservoir. In this case, manual maintenance is required. During maintenance, in order to ensure the safety of personnel, it is necessary to prevent water from leaking from the hydraulic tunnel. Therefore, the water body on one side of the hydraulic tunnel must be blocked.

[0003] At present, the common blocking method is to freeze a section of water in the tunnel into an ice plug to block the water flow. However, in order to prevent the ice plug from being broken by the impact of the water flow, this method requires freezing a large amount of water to form a long ice plug to ensure sufficient friction between the ice plug and the inner wall of the tunnel. Although this method is effective, the need to freeze a large amount of water makes the whole process not only time-consuming, but also energy-intensive and less economical. Summary of the invention

[0004] The technical problem to be solved by the present invention is: how to achieve low-energy-consumption and rapid plugging of hydraulic tunnels.

[0005] The technical solution proposed by the present invention to solve the above technical problems is: it includes a refrigerator arranged outside a hydraulic tunnel and a cylindrical water bag inserted into the hydraulic tunnel; an evaporation tube is wound around the surface of the water bag so that a gap is formed between the surface of the water bag and the inner wall of the hydraulic tunnel; the water bag is filled with brine; the evaporation tube is filled with refrigerant, and the inlet and outlet of the evaporation tube are connected to the refrigerator through a cooling pipeline to form a closed circulation loop; when the system is working, as the refrigerant circulates in the circulation loop, the water in the gap between the surface of the water bag and the inner wall of the hydraulic tunnel freezes and forms a circle of annular toothed gap ice plugs surrounding the surface of the water bag and the inner wall of the hydraulic tunnel, and the water pressure is resisted by the friction between the gap ice plug and the inner wall of the hydraulic tunnel.

[0006] Furthermore, the water bag is made of rubber.

[0007] Furthermore, the refrigerant is liquid nitrogen.

[0008] The beneficial effects of the present invention are as follows: since a cylindrical water bag is inserted into the hydraulic tunnel, an evaporation tube is wound on the surface of the water bag. When the system is working and the refrigerant circulates, the water temperature of the water body around the water bag is reduced, causing the water body to freeze into an ice plug. Compared with the traditional method of cooling a large amount of water to form an ice plug for sealing, the present invention uses the adhesion of the ice plug to bond the surface of the water bag to the hydraulic tunnel to form an effective sealing body that fills the internal space of the tunnel. In this way, the ice plug is formed only on the water body in the gap between the surface of the water bag and the inner wall of the hydraulic tunnel, which greatly reduces the amount of water freezing. This not only reduces energy consumption, but also further accelerates the speed of ice plug formation, and can effectively seal the hydraulic tunnel at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The bladder plug system for plugging a hydraulic tunnel of the present invention will be further described below in conjunction with the accompanying drawings.

[0010] Figure 1 The figure is a schematic diagram of the overall structure of a bladder plug system for plugging a hydraulic tunnel according to an embodiment.

[0011] Figure 2 The invention is a schematic diagram of an ice plug of a bladder plug system for plugging a hydraulic tunnel in an embodiment.

[0012] In the figure: 1. hydraulic tunnel; 2. refrigerator; 3. water bag; 4. evaporation pipe; 5. cooling pipeline; 6. gap ice plug; 7. travel wheel. DETAILED DESCRIPTION

[0013] Example

[0014] The capsule plug system for plugging a hydraulic tunnel of this embodiment is as follows: Figure 1 As shown, it includes a refrigerator 2 arranged on a ship outside a hydraulic tunnel 1 and a cylindrical water bag 3 inserted into the hydraulic tunnel 1. The water bag 3 is made of rubber. In order to facilitate the water bag 3 to be sent into the hydraulic tunnel 1, a running wheel 7 is installed at the bottom of the water bag 3; an evaporation tube 4 is wound around the surface of the water bag 3, so that a gap is formed between the surface of the water bag 3 and the inner wall of the hydraulic tunnel 1; the water bag 3 is filled with salt water, and the salt water ensures that the inside of the water bag 3 will not freeze; the evaporation tube 4 is filled with a refrigerant, and the refrigerant is liquid nitrogen. The inlet and outlet of the evaporation tube 4 are connected to the refrigerator 2 through a cooling pipeline 5 to form a closed circulation loop.

[0015] When the system is working, as the refrigerant circulates in the circulation loop, the temperature of the water around the water bag drops rapidly. Figure 2As shown, the water in the gap between the surface of the water bag 3 and the inner wall of the hydraulic tunnel 1 freezes and forms a ring-shaped toothed gap ice plug 6 surrounding the surface of the water bag 3 and the inner wall of the hydraulic tunnel 1. The gap ice plug 6, through its adhesion, bonds the surface of the water bag and the hydraulic tunnel to form an effective blocking body that fills the internal space of the tunnel, and resists water pressure through the friction between the gap ice plug 6 and the inner wall of the hydraulic tunnel 1.

[0016] In this embodiment, the water body to be frozen is limited to the gap between the surface of the water bag 3 and the inner wall of the hydraulic tunnel 1. Compared with the traditional method of freezing the water body in the entire tunnel, the amount of water body frozen is greatly reduced, the energy consumption is reduced, and the speed of freezing the water body into ice plug is greatly accelerated.

[0017] The above description is only a preferred embodiment of the present invention, but the present invention is not limited thereto. All equivalent replacements or equivalent changes of the concepts and technical solutions according to the present invention should be included in the protection scope of the present invention.

Claims

1. A bladder plugging system for plugging a hydraulic tunnel, comprising a refrigerator arranged outside the hydraulic tunnel and a cylindrical water bag plugged into the hydraulic tunnel; characterized in that: An evaporation tube is wound around the surface of the water bag so that a gap is formed between the surface of the water bag and the inner wall of the hydraulic tunnel; the water bag is filled with brine; the evaporation tube is filled with refrigerant, and the inlet and outlet of the evaporation tube are connected to the refrigerator through a cooling pipeline to form a closed circulation loop; when the system is working, as the refrigerant circulates in the circulation loop, water in the gap between the surface of the water bag and the inner wall of the hydraulic tunnel freezes and forms a ring-shaped toothed gap ice plug surrounding the surface of the water bag and the inner wall of the hydraulic tunnel, and the water pressure is resisted by the friction between the gap ice plug and the inner wall of the hydraulic tunnel.

2. The bladder plug system for plugging a hydraulic tunnel according to claim 1, characterized in that: The water bag is made of rubber.

3. The bladder plug system for plugging a hydraulic tunnel according to claim 1, characterized in that: The refrigerant is liquid nitrogen.

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