CN-121990140-A - Underwater folding air bag inflation auxiliary device

CN121990140ACN 121990140 ACN121990140 ACN 121990140ACN-121990140-A

Abstract

The invention discloses an underwater folding air bag inflation auxiliary device which comprises an inflation unit, a stretching mechanism and an air bag, wherein the inflation unit comprises a base and an air generator, a cavity is arranged on the base, a plurality of air outlet holes communicated with the cavity are formed in the periphery of the base, the air generator is arranged in the cavity, the stretching mechanisms are arranged on the base and comprise a single-direction air guide piece, a telescopic piece and an inflation nozzle, the single-direction air guide piece and the telescopic piece are arranged on the base and correspond to the air outlet holes, the movable end of the telescopic piece is connected with the inflation nozzle, the single-direction air guide piece can guide air in the cavity into the telescopic piece so as to drive the movable end of the telescopic piece to move, when the movable end reaches a maximum travel state, the air can be discharged through the inflation nozzle, and a plurality of air inlets in the periphery of the air bag are respectively communicated with the inflation nozzles of the stretching mechanisms. Solves the problems that the air bag has poor stability in the underwater unfolding process, is easy to be wound and overturned or can not be inflated according to a preset shape.

Inventors

MA QUANDANG
ZHAO ZIQI
LIN ZHISHAN
FAN YIXUAN
XIE YONGHUI
BAI ZHONGDA
CHEN GUOHAO
LIU ZHAOBIN
JIANG XINYI
YANG YUHANG
QI JIAYUE

Assignees

武汉理工大学

Dates

Publication Date: 20260508
Application Date: 20260410

Claims (10)

1. An underwater folding airbag inflation assisting device, characterized by comprising: The inflation unit comprises a base and a gas generator, wherein a cavity is formed in the base, a plurality of gas outlet holes communicated with the cavity are formed in the periphery of the base, and the gas generator is arranged in the cavity; the expanding mechanism comprises a unidirectional air guide piece, a telescopic piece and an air inflation nozzle, wherein the unidirectional air guide piece and the telescopic piece are both arranged on the base and correspond to the air outlet holes, the movable end of the telescopic piece is connected with the air inflation nozzle, the unidirectional air guide piece can guide air in the cavity into the telescopic piece so as to drive the movable end of the telescopic piece to move, and when the movable end reaches the maximum travel state, the air can be discharged through the air inflation nozzle, and And a plurality of air inlets at the periphery of the air bag are respectively communicated with a plurality of air inflation nozzles of the expanding mechanism.
2. The underwater folding airbag inflation auxiliary device according to claim 1, wherein the unidirectional air guide piece comprises a valve body, a spring, a ball body and a piston block, wherein an installation cavity is formed in the valve body, an air inlet and an air outlet which are communicated with the installation cavity are respectively formed in the opposite ends of the valve body, the inner diameter of the installation cavity towards one end of the air inlet is gradually reduced, the valve body is connected with the base, the air outlet corresponds to the air outlet, the piston block, the spring and the ball body are all arranged in the installation cavity, the spring and the ball body are respectively positioned on the opposite sides of the piston block, and the ball body is in a first state of being abutted against the inner wall of one end of the installation cavity to form a closed air inlet and is separated to form a second state of being open to the air inlet.
3. An underwater folded airbag inflation assisting device as claimed in claim 2, wherein a side surface of the piston block is provided with a tapered groove, and in the first state, the ball is further abutted against an inner wall of the tapered groove.
4. The underwater folding airbag inflation auxiliary device according to claim 2, wherein the expansion piece comprises a primary expansion pipe and a secondary expansion pipe, the primary expansion pipe and the secondary expansion pipe are connected with the base, the secondary expansion pipe is coaxially arranged in the primary expansion pipe in a penetrating mode, the movable end of the primary expansion pipe is connected with the inflation nozzle, the movable end of the secondary expansion pipe is connected with the movable end of the primary expansion pipe, the gas transmission port of the secondary expansion pipe corresponds to the gas outlet hole, and when the secondary expansion pipe pneumatically drives the primary expansion pipe to be in a maximum stroke state, the gas outlet of the secondary expansion pipe can be opened so that gas in the secondary expansion pipe can enter the primary expansion pipe.
5. The underwater folding air bag inflation auxiliary device according to claim 4, wherein the primary telescopic pipe comprises a plurality of first pipe bodies with decreasing pipe diameters and in sliding sleeve connection, the first pipe body with the largest pipe diameter is fixedly connected with the base, and the first pipe body with the smallest pipe diameter is connected with the inflation nozzle; The second-level telescopic pipe comprises a plurality of second pipe bodies, piston rods and sliding blocks, wherein the pipe diameters of the second pipe bodies are decreased progressively and sleeved in a sliding mode, the second pipe body with the largest pipe diameter is fixedly connected with the base, an exhaust port is formed in the end portion of the second pipe body with the smallest pipe diameter, one end of each piston rod penetrates through the second pipe body with the smallest pipe diameter and is fixedly connected with the corresponding sliding block, and the other end of each piston rod is fixedly connected with the end portion of the first pipe body with the smallest pipe diameter.
6. The underwater folding airbag inflation assisting device as claimed in claim 1, wherein the opening mechanism further comprises a circular arc-shaped baffle, and the concave side of the circular arc-shaped baffle is connected with the inflation nozzle.
7. An underwater folded airbag inflation aid as claimed in claim 1, wherein the nozzle of the inflation nozzle is a flat fan-shaped nozzle.
8. The underwater folding airbag inflation assisting device as claimed in claim 1, wherein the middle portion of the airbag is further fixedly connected with the base.
9. The underwater folding airbag inflation auxiliary device according to claim 2, wherein a gas generating box is fixedly arranged in the base, a plurality of air dispersing holes are formed in the gas generating box at intervals along the circumferential direction, each air dispersing hole corresponds to each air outlet hole one by one, the gas generator is located in the gas generating box, the valve body is further connected with the gas generating box, and the air inlet corresponds to the air dispersing holes.
10. An underwater folded airbag inflation assist device as in claim 1 wherein the gas generator is a pyrotechnic gas generator.

Description

Underwater folding air bag inflation auxiliary device Technical Field The invention relates to the technical field of rescue equipment, in particular to an underwater folding air bag inflation auxiliary device. Background With the increasing frequency of marine economic activities, maritime distress accidents increase year by year, wherein the search and rescue of people falling into water are always important and difficult points of maritime emergency rescue. Conventional offshore life-saving equipment, such as life-buoy, life raft, rope throwing device and the like, generally rely on autonomous grabbing or cooperation operation of people falling into water. However, in an actual rescue scene, a person falling into water often cannot actively cooperate with rescue due to temperature loss, physical exhaustion or confusion, so that the traditional equipment is difficult to play a role at key time, and the rescue efficiency and success rate are greatly reduced. In recent years, with the development of unmanned intelligent equipment technology, an underwater rescue system based on an autonomous underwater vehicle becomes a research hotspot. The autonomous underwater vehicle carries the rescue devices such as the air bags and the like, so that active positioning, approaching and floating rescue can be finished underwater, and the rescue capability of personnel falling into water without behavior capability is remarkably improved. However, due to the fact that the underwater environment is complex and has factors such as water flow disturbance and pressure change, the deployment and inflation process of the air bag under the water face a plurality of technical challenges that the stability of the air bag is poor in the underwater deployment process, the water flow, wave and other hydraulic disturbance can impact the flexible air bag in inflation, the deployment track of the air bag is uncontrollable, winding, overturning or inflation according to a preset form is easy to occur, the inflation efficiency and reliability of the air bag are insufficient, in the prior art, a simple single-point inflation mode is mostly adopted, in the underwater environment, the single-point inflation is easy to cause local swelling and uneven inflation of the air bag, the filling time is prolonged, and the air bag is possibly damaged due to stress concentration. Disclosure of Invention The invention aims to overcome the defects of the technology, and provides an underwater folding air bag inflation auxiliary device which solves the problems that an air bag is poor in stability in the underwater unfolding process, is easy to wind and overturn or cannot be inflated according to a preset form in the prior art. In order to achieve the technical purpose, the invention adopts the following technical scheme: The invention provides an underwater folding air bag inflation auxiliary device, which comprises: The inflation unit comprises a base and a gas generator, wherein the base is provided with a cavity, the periphery of the base is provided with a plurality of gas outlet holes communicated with the cavity, and the gas generator is arranged in the cavity; The expanding mechanism comprises a unidirectional air guide piece, a telescopic piece and an air inflation nozzle, wherein the unidirectional air guide piece and the telescopic piece are both arranged on the base and correspond to the air outlet holes, the movable end of the telescopic piece is connected with the air inflation nozzle, the unidirectional air guide piece can guide air in the cavity into the telescopic piece so as to drive the movable end of the telescopic piece to move, and when the movable end reaches the maximum stroke state, the air can be discharged through the air inflation nozzle, and And the air inlets at the periphery of the air bag are respectively communicated with the air inflation spray heads of the plurality of expanding mechanisms. In some embodiments, the unidirectional air guide member comprises a valve body, a spring, a ball body and a piston block, wherein an installation cavity is formed in the valve body, an air inlet and an air outlet which are communicated with the installation cavity are respectively formed in the opposite ends of the valve body, the inner diameter of one end of the installation cavity, which faces the air inlet, is gradually reduced, the valve body is connected with a base, the air outlet corresponds to the air outlet, the piston block, the spring and the ball body are all arranged in the installation cavity, the spring and the ball body are respectively positioned on the opposite sides of the piston block, and the ball body is in a first state of being abutted against the inner wall of one end of the installation cavity to form the closed air inlet, and is separated to form a second state of being open to the air inlet. In some embodiments, a side of the piston block is provided with a conical groove, and in the first state, the sph