Continuous needleless injector pressurized by reducing cylinder

Abstract

The invention relates to a continuous needleless injector pressurized by a reducing cylinder. The continuous needleless injector is provided with a power air source, a liquid medicine storing device, a cylinder assembly, an air pressure reducing and regulating valve (2), a trigger (10), a ring (9), a handle (11), a cylinder action control valve, a liquid plunger pump and a micropore jet flow spraying nozzle, wherein the air pressure reducing and regulating valve (2), the trigger (10), the ring (9) and the handle (11) are externally connected with the power air source. The cylinder assembly is a reducing step-shaped cylinder assembly, and all of parts except the power air source and the air pressure reducing and regulating valve are integrally installed on a cylinder body (6) in the reducing step-shaped cylinder assembly to form an integrated handheld instrument. The continuous needleless injector pressurized by the reducing cylinder has the advantages of being light in holding, simple in operation, air-saving and capable of automatically filling liquid medicine and can accurately and quantitively inject liquid medicine into a human body and an animal body in a high-pressure liquid column jet flow mode.

Description

technical field [0001] The invention relates to a needle-free injector, in particular to a continuous needle-free injector with variable diameter cylinder pressurization. Background technique [0002] At present, pneumatic needle-free injectors with similar functions use equal-diameter cylinders to pressurize the drug solution. The air source device needs to be carried and is heavy; the magnet used in the second claim of the patent document keeps the piston in the retracted position, but the problem is that many parts are required; the magnet used in the second to fifth claims of the patent document The method of adjusting the injection dose is not only complicated, but also inaccurate; and this patent document does not use the method of adjusting the air pressure to control the jet intensity, so it cannot meet the requirements of different kinds of animals, different age animals, different liquid viscosity, and different injection depths. injection requirements. [0003] ...

AI Technical Summary

Problems solved by technology

[0002] At present, pneumatic needle-free injectors with similar functions use equal-diameter cylinders to pressurize the drug solution. The air source device needs to be carried and is heavy; the magnet used in the second claim of the patent document keeps the piston in the retracted position, but the problem is that many parts are required; the magnet used in the second to fifth claims of the patent document The method of adjusting the injection dose is not only complicated, but also inaccurate; and this patent document does not use the method of adjusting the air pressure to control the jet intensity, so it cannot meet the requirements of different kinds of animals, different age animals, different liquid viscosity, and different injection depths. injection requirements

[0003] At present, there is another type of pneumatic needle-free injector. Due to the separate design of gas-liquid pressurization, liquid medicine jet and control, a long high-pressure pipeline is used to transport the medicine liquid, so that the medicine liquid remains in the high-pressure delivery pipe and wastes a lot. , not easy to clean and disinfect

In addition to pneumatic, some products also need to be equipped with electric control valves to complete the control of the action, making the equipment more scattered and difficult to carry. For example, the technical solution published in the Chinese patent document (CN202459643U) has such a problem.

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