At present, the society is prone to sudden disasters, which are difficult to avoid and threaten the lives of the masses. The existing rescue equipment can not fulfill all kinds of rescue functions in a sudden situation and can not be effectively implemented. Protect the safety of the masses. Therefore, the amphibious rescue stretcher came into being, from the safe, efficient, humane point of view, combined with the original rescue stretcher and innovative technology, fully embodies the safe, efficient and humane purposes.

The stretcher consists of the following parts: ① Bottom stretcher: The bottom stretcher can be folded with a combination of a stretcher and a stretcher (shown in Figure 1); ② laminated inflatable rescue bag: the rescue bag (Figure 2 The bag is flexible and functional so that it can be folded and folded when not in use. The bag is designed to be used with the stretcher. ③ The sub-low temperature ice cap: its specification is sewn according to the actual situation. , Put the emergency medicine box frozen 2 ~ 4h, Liangdian snow snow-like shape after the removal. Jackets Customized cloth covers can be used for the patient. According to the condition and the use of time to replace the cooler pads, each sustainable use 3 ~ 4h.

Optimum Design of Structural Parameters of Stent Vibration Isolation System

The majority of ambulance stretchers in the current week are rigid support, no vibration damping, or although the elastic support, but because of the vibration system of the mechanical parameters are not reasonable, and thus less comfortable stretcher, we recumbent body The optimal structural parameters of the stretcher vibration isolation system are optimized by using the optimized mathematical method, and the comfort of the stretcher is effectively improved. The six-degree-of-freedom mechanical model of the ambulance stretcher is simplified to six degrees of freedom mechanics model, which are: Zb-vertical displacement of the center of mass of the spring mass; Ob-the longitudinal angular displacement of the mass of the spring around its center of mass ; Zf a vertical displacement of the center of gravity of the former unsprung mass; Zr a non-reed mass center of gravity at the vertical displacement; Zd a stretcher a vertical system of the human body at the center of the vertical displacement; Odan stretcher a body The longitudinal angular displacement of the center of mass.

The basic idea of complex optimization method is to determine the initial complex shape on the feasible region and then compare the objective function value at each vertex of the complex shape to eliminate the highest point and substitute it with the smaller objective function value. The feasible point is used as the new vertex to form a new composite shape, so that the function value at the vertex decreases gradually, and the vertex gradually approximates the optimal solution of the problem. The results show that the stiffness of the front support is reasonable, the stiffness of the rear support is too large, and the damping coefficient is too small, which leads to the large square value of the vibration acceleration of the human body system. When the vehicle speed is 50km / h, the mean square value of the vertical acceleration of the one-position human body system of the stretcher is decreased by 40.7%, and the mean square value of the vibration angular acceleration is reduced by 55.76% The vibration isolation performance of the supine body system has been significantly improved. By this optimization method, a set of reasonable matching spring stiffness and damping coefficient can be obtained, which provides the basis for the design of the stretcher support.

Rescue Bag Principle and Structure Design

In the hot waters, when the patient fell into the water after the accident, even boarded the lifeboat (raft), such as life-saving equipment without awning, continuous sun exposure. But also will cause the fatal threat to the victims, causing skin burns, the formation of erythema, edema, etc., in the sun exposure, the original wounds into the water will worsen. Amphibious Rescue Stretchers are made of special materials, so they have a very good resistance to ultraviolet radiation.

Rescue bags to support the amphibious stretcher for land and sea rescue. Two sides, with airtight zipper; two layers, the bottom of the bag through the hand side of the bag placed in the air after the inflatable floating in the water, with the outside world at the top of the outer isolation there are several small holes; Easy to Shoulong, anti-flip, the outer layer of anti-radiation and other functions. Usually when not in Shoulou placed in the storage and transportation box, when used for the cabin design, rescue bags from the bottom of a rectangular inflatable cylinder body. Two rectangular floats and a base frame extending from two sides of the bottom and intersecting the top two inflatable pillars to form a rescue bag. The inflatable pillow and the outside of the stretcher are formed into a relatively closed cabin shape by the waterproof and breathable PU cloth.

Rescue bags look from the side was symmetrical irregular hexagonal body, add load, the overall center of gravity is located in the lower hexagonal center, but the rescue bag fell into the water, you can ensure that in addition to floating position can float stable, if For other locations, can not achieve the stability of balance, and buoyancy and gravity generated torque are pointing to the floating position, in order to achieve the rescue bag anti-flip floating function. According to the stable equilibrium condition of the floating body, the buoyancy of the floating body is higher than the gravity center of the floating body, and the floating body is in a stable equilibrium state. In the selection of materials. The TPU fabric was selected. Waterproof zipper choice: Choose watertight air zipper.