Multi-nozzle device of needleless injector for veterinary use

Abstract

The invention provides a multi-nozzle device of a needleless injector for veterinary use. Specifically, a plurality of nozzles are arranged at a jet flow spray head part of a needleless injector main body, and the plurality of nozzles are arranged in a plurality of nozzle assembly holes (9) of a shared nozzle nut (5); each nozzle is provided with a spraying hole and mainly comprises the shared nozzle nut (5), a nozzle (13), a shared pressing plate (23), a shared filter screen (27) and a shared filter screen gasket (28) which are connected in sequence; and the multiple nozzles spray liquid medicine at the same time, the sprayed liquid medicine is distributed in an included angle, liquid medicine spraying is finished on the premise that a small spraying hole diameter is kept before an animal reacts to injection stimulation, and injection of a large dose of liquid medicine to the animal can be completed without effective control over the animal.

Description

technical field [0001] The invention belongs to the field of medical equipment and relates to a nozzle, in particular to a multi-nozzle device of a needle-free injector for animals. Background technique [0002] The multi-nozzle device of the veterinary needle-free injector of the present invention is that a plurality of nozzles are arranged on the jet nozzle part of the main body of the veterinary needle-free injector, and the plurality of nozzles are inclined outward at an angle α, and each nozzle has a spray hole , multiple nozzles spray liquid medicine at the same time, the purpose is to increase the injection flow rate, shorten the injection time, expand the distribution range of the liquid medicine under the premise of maintaining a small injection aperture, and complete the injection of the liquid medicine before the animal responds to the injection stimulus. The purpose of injecting large doses of medicinal liquid to animals can be achieved without effectively contro...

AI Technical Summary

Problems solved by technology

[0012] The needle-free injectors listed above all use one spray hole to spray the liquid medicine. The defect is that when a large dose of medicine liquid is sprayed through one spray hole, too much medicine liquid will be concentrated in one area, and the medicine liquid is easy to return through the injection hole after injection. In order to prevent the medicinal liquid from flowing back to the external body, only a small injection aperture can be selected. The small injection aperture has a small flow rate, and it takes a long time to inject a large dose of medicinal liquid. Effective control of the animal must be carried out to complete the injection.

[0017] However, needle-free syringes for humans are mainly used for dermis and subcutaneous injections. The injection pressure is low and the number of times of use is small. Materials such as polycarbonate, which is easy to produce and low in cost, can be used to mold the ampoule and multiple injection holes at one time. , but it cannot withstand the ultra-high pressure of animal injection, and the liquid medicine cannot be injected into the deep muscle of the animal. The injection hole of polycarbonate material will be severely worn after repeated injection

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