Device forming a water-free space on the underwater surface

Abstract

The disclosure discloses an underwater cover device, comprising a cover body and a gas source connected to the cover body. The cover body has an open end face directed towards an underwater surface, forming a gap between the open end face and the underwater surface. A rotating water flow is formed inside the cover body, and the gas source supplies air into the cover body. The rotating water flow prevents the air from escaping through the gap between the cover body and the underwater surface, thereby forming a water-free space on the underwater surface. This device is applicable to underwater surfaces at any inclination angle and can effectively establish a water-free space even if there is a gap or no contact between the underwater cover device and the underwater surface, demonstrating excellent applicability.

1 . An underwater cover device, comprising a cover body and a gas source connected to the cover body, wherein the cover body has an open end face directed towards an underwater surface, forming a rotating water flow inside the cover body the gas source supplies air into the cover body, and the rotating water flow prevents the air from escaping through the gap between the open end face and the underwater surface, thereby forming a water-free space on the underwater surface. 
     
     
         2 . The underwater cover device according to  claim 1 , wherein the gas source includes a gas flow regulating mechanism for controlling the flow rate of air supplied into the cover body, thereby controlling the volume of air inside the cover body. 
     
     
         3 . The underwater cover device according to  claim 1 , wherein one or more nozzles are arranged inside the cover body, with the nozzles being tangential to the inner wall surface of the cover body, and configured to that water is injected into the cover body through the nozzles and flows along the inner wall surface, forming a rotating water flow inside the cover body. 
     
     
         4 . The underwater cover device according to  claim 3 , wherein the gas source is connected to the cover body through the nozzles, and air is supplied into the cover body through the nozzles. 
     
     
         5 . The underwater cover device according to  claim 1 , wherein the cover body is provided with air holes, and the gas source is connected to the air holes to supply air into the cover body through the air holes. 
     
     
         6 . The underwater cover device according to  claim 3 , wherein an annular partition is arranged inside the cover body, separating the water-free space from the rotating water flow. 
     
     
         7 . The underwater cover device according to  claim 1 , wherein blades are arranged inside the cover body, and a motor drives the blades to rotate, causing the water inside the cover body to rotate and form a rotating water flow, wherein the rotating water flow prevents the air from escaping through the gap between the open end face and the underwater surface. 
     
     
         8 . The underwater cover device according to  claim 1 , wherein the cover body is provided with drainage channels, and part of the water inside the cover body is discharged through the drainage channels. 
     
     
         9 . The underwater cover device according to  claim 1 , wherein the device further comprises one or more air chambers connected to the air region inside the cover body, and wherein water in the air chambers flows into the cover body while air enters the air chambers, forming a water-free space inside the air chambers.