阅读说明：本技术 射流速度可控的双流道式无针注射装置及方法 (Double-channel needleless injection device with controllable jet velocity and method ) 是由 康勇 曾栋坪 伍妮 王泽峰 汪祖安 李登 王晓川 于 2020-11-17 设计创作，主要内容包括：本发明公开了一种射流速度可控的双流道式无针注射装置及方法,该装置包括启动开关、动力源、液腔、二位三通电磁换向阀、输液管和软管；液腔用于储存药液,液腔的进出口分别与动力源和二位三通电磁换向阀入口端连接,二位三通电磁换向阀的两个出口端分别与输液管和软管的入口连接,输液管为刚性管且出口设有喷嘴,软管出口与输液管前部连通,动力源用于推动液腔内活塞从而为注射提供动力,动力源能根据所需的射流速度设定动力,二位三通电磁换向阀控制端连接有延时继电器,启动开关分别与动力源和延时继电器连接。本发明能提高药液利用率,降低注射风险。(The invention discloses a double-flow-channel needleless injection device with controllable jet flow speed and a method thereof, wherein the device comprises a starting switch, a power source, a liquid cavity, a two-position three-way electromagnetic directional valve, a liquid conveying pipe and a hose; the liquid cavity is used for storing liquid medicine, the inlet and the outlet of the liquid cavity are respectively connected with a power source and the inlet end of the two-position three-way electromagnetic directional valve, two outlet ends of the two-position three-way electromagnetic directional valve are respectively connected with the inlet of a liquid conveying pipe and the inlet of a hose, the liquid conveying pipe is a rigid pipe, a nozzle is arranged at the outlet of the rigid pipe, the outlet of the hose is communicated with the front part of the liquid conveying pipe, the power source is used for pushing a piston in the liquid cavity to provide power for injection, the power source can set power according to required jet speed, the control end of the two. The invention can improve the utilization rate of the liquid medicine and reduce the injection risk.)

1. A double-channel needleless injection device with controllable jet velocity is characterized in that: comprises a starting switch, a power source, a liquid cavity, a two-position three-way electromagnetic directional valve, a liquid conveying pipe and a hose; the liquid cavity is used for storing liquid medicine, an inlet and an outlet of the liquid cavity are respectively connected with a power source and an inlet end of the two-position three-way electromagnetic directional valve, two outlet ends of the two-position three-way electromagnetic directional valve are respectively connected with inlets of a liquid conveying pipe and a hose, the liquid conveying pipe is a rigid pipe, a nozzle is arranged at an outlet of the liquid conveying pipe, an outlet of the hose is communicated with the front part of the liquid conveying pipe, the power source is used for pushing a piston in the liquid cavity so as to provide power for injection, the power source can set power according to required jet speed, a control end of the two-; when the starting switch is started, the power source and the time delay relay are synchronously started, the two-position three-way electromagnetic directional valve is switched to the position of the infusion tube, and when the set time of the time delay relay is reached, the two-position three-way electromagnetic directional valve is reset to the position of the hose.

2. The dual flow channel needleless injection device of claim 1 in which the jet velocity is controlled, wherein: the time delay relay comprises a normally closed contact switch and an electrified time delay coil, and the starting switch, the normally closed contact switch, the electrified time delay coil and the control end of the two-position three-way electromagnetic directional valve are sequentially connected.

3. The dual flow channel needleless injection device of claim 1 in which the jet velocity is controlled, wherein: the hose is replaceable and has a plurality of groups of different lengths.

4. The dual flow channel needleless injection device of claim 1 in which the jet velocity is controlled, wherein: the length of the liquid cavity is adjustable.

5. The dual flow channel needleless injection device of claim 1 in which the jet velocity is controlled, wherein: the inlet and outlet of the hose are respectively connected with the outlet end of the two-position three-way electromagnetic directional valve and the side interface at the front part of the infusion tube through the antiskid joint.

6. The dual flow channel needleless injection device of claim 1 in which the jet velocity is controlled, wherein: the starting switch is of a trigger type or a button type.

7. The dual flow channel needleless injection device of claim 1 in which the jet velocity is controlled, wherein: the power source adopts a voice coil motor, an ultrasonic motor or compressed gas.

8. The dual flow channel needleless injection device of claim 1 in which the jet velocity is controlled, wherein: the transfusion tube is made of stainless steel material.

9. The dual flow channel needleless injection device of claim 1 in which the jet velocity is controlled, wherein: the hose is made of medical soft PVC material.

10. A double-channel needleless injection method with controllable jet velocity is characterized in that: the use of a dual-channel needleless injection device with controllable jet velocity according to any of claims 1 to 9, comprising the steps of,

s1) setting the power of a power source and selecting a hose with a corresponding length according to the required jet speed;

s2) the two-position three-way electromagnetic directional valve is initially positioned at the position of the hose, liquid medicine is added into the liquid cavity, the hose is filled with the liquid medicine, the liquid medicine flows into the infusion tube, and a small amount of air still exists in the infusion tube;

s3) switching the two-position three-way electromagnetic directional valve to the position of the infusion tube, continuously adding the liquid medicine to discharge the residual gas, and filling the infusion tube with the liquid;

s4) setting the time of the delay relay;

s5) starting a starting switch, synchronously starting a power source and a delay relay, pushing a piston in a liquid cavity by the power source to enable the liquid medicine to be ejected from a nozzle at a high jet speed through a liquid conveying pipe, resetting a two-position three-way electromagnetic directional valve when the set time of the delay relay is reached, and enabling the liquid medicine to flow through a hose to be ejected from the nozzle at a low jet speed;

s6) the jet flow process is finished, and the time delay relay is reset.

Technical Field

The invention belongs to the field of medical instruments, and particularly relates to a double-channel needleless injection device with controllable jet flow speed and a method thereof.

Background

Needleless injection works on the principle that a high pressure jet is used to cause the liquid drug to penetrate the skin and reach the skin. During injection, the high-speed jet firstly penetrates through the skin to form a hole, and then the liquid medicine is diffused in the skin through the hole; in the stage of forming holes, the jet flow with higher speed is required to impact the skin to deform, damage and form the holes, and along with the increase of the jet flow speed, the liquid medicine splashes, the atomization degree is increased, and the hole depth is increased; during the liquid medicine diffusion stage, the tissue is stressed by keeping the jet velocity high, and even nerve endings of a patient are stimulated to cause severe pain or tissue damage.

The injection time of the existing needleless injector is extremely short, and in order to ensure the injection success rate, the jet speed is mostly kept at the speed required by piercing the skin, so that the liquid medicine is splashed and atomized, and simultaneously, the stimulation intensity to pain nerves and the risk of tissue damage are increased.

Disclosure of Invention

The invention aims to provide a double-channel needleless injection device and method with controllable jet flow speed, which realize the rapid conversion of the jet flow speed in a needleless injection process, prevent liquid medicine from splashing, improve the utilization rate of the liquid medicine and reduce the risks of injection pain and tissue damage caused by over-deep injection.

The technical scheme adopted by the invention is as follows:

a double-channel needleless injection device with controllable jet flow speed comprises a starting switch, a power source, a liquid cavity, a two-position three-way electromagnetic directional valve, an infusion tube and a hose; the liquid cavity is used for storing liquid medicine, an inlet and an outlet of the liquid cavity are respectively connected with a power source and an inlet end of the two-position three-way electromagnetic directional valve, two outlet ends of the two-position three-way electromagnetic directional valve are respectively connected with inlets of a liquid conveying pipe and a hose, the liquid conveying pipe is a rigid pipe, a nozzle is arranged at an outlet of the liquid conveying pipe, an outlet of the hose is communicated with the front part of the liquid conveying pipe, the power source is used for pushing a piston in the liquid cavity so as to provide power for injection, the power source can set power according to required jet speed, a control end of the two-; when the starting switch is started, the power source and the time delay relay are synchronously started, the two-position three-way electromagnetic directional valve is switched to the position of the infusion tube, and when the set time of the time delay relay is reached, the two-position three-way electromagnetic directional valve is reset to the position of the hose.

Furthermore, the time delay relay comprises a normally closed contact switch and an electrified time delay coil, and the starting switch, the normally closed contact switch, the electrified time delay coil and the control end of the two-position three-way electromagnetic directional valve are sequentially connected.

Further, the hose is replaceable, and the hose has a plurality of different lengths.

Further, the length of the liquid cavity is adjustable.

Furthermore, the inlet and the outlet of the hose are respectively connected with the outlet end of the two-position three-way electromagnetic directional valve and a side interface at the front part of the infusion tube through an anti-skid joint.

Further, the starting switch is of a trigger type or a button type.

Further, the power source adopts a voice coil motor, an ultrasonic motor or compressed gas.

Furthermore, the infusion tube is made of stainless steel materials.

Furthermore, the hose is made of medical soft PVC material.

A double-channel needleless injection method with controllable jet velocity adopts the double-channel needleless injection device with controllable jet velocity, and comprises the following steps:

s1) setting the power of a power source and selecting a hose with a corresponding length according to the required jet speed;

s2) the two-position three-way electromagnetic directional valve is initially positioned at the position of the hose, liquid medicine is added into the liquid cavity, the hose is filled with the liquid medicine, the liquid medicine flows into the infusion tube, and a small amount of air still exists in the infusion tube;

s3) switching the two-position three-way electromagnetic directional valve to the position of the infusion tube, continuously adding the liquid medicine to discharge the residual gas, and filling the infusion tube with the liquid;

s4) setting the time of the delay relay;

s5) starting a starting switch, synchronously starting a power source and a delay relay, pushing a piston in a liquid cavity by the power source to enable the liquid medicine to be ejected from a nozzle at a high jet speed through a liquid conveying pipe, resetting a two-position three-way electromagnetic directional valve when the set time of the delay relay is reached, and enabling the liquid medicine to flow through a hose to be ejected from the nozzle at a low jet speed;

s6) the jet flow process is finished, and the time delay relay is reset.

The invention has the beneficial effects that:

the liquid conveying pipe and the hose form two flow passages, liquid medicine flows to the nozzle from different flow passages through the switching of the two-position three-way electromagnetic directional valve, the energy loss magnitude caused by different flow passages is different, the jet speed of the outlet of the nozzle is controlled, and due to the adoption of the time delay relay, the jet speed in the jet hole forming stage and the liquid medicine diffusion stage can be accurately controlled, the rapid conversion of the jet speed in the needleless injection process is realized, the reaction time is short, the liquid medicine is prevented from splashing, the liquid medicine utilization rate is improved, and meanwhile, the risk of injection pain and tissue damage caused by over-deep injection is reduced.

Drawings

Fig. 1 is a schematic structural diagram of a double-channel needleless injection device with controllable jet velocity in the embodiment of the invention.

FIG. 2 is a schematic view showing the installation of the liquid chamber, the two-position three-way electromagnetic directional valve, the liquid delivery pipe, the hose and the nozzle in the embodiment of the invention.

Fig. 3 is a cross-sectional view of fig. 2 (with the hose removed).

In the figure: 1-starting a switch; 2-a power source; 3-a liquid cavity; 4-a two-position three-way electromagnetic directional valve; 41-valve seat; 42-a valve core; 43-a return spring; 5-a transfusion tube; 6-a hose; 7-a nozzle; 8-time delay relay; 9-normally closed contact switch; 10-a power-on delay coil; 11-slip joints; 12-.

Detailed Description

The invention is further described below with reference to the figures and examples.

As shown in fig. 1 to 3, a double-channel needleless injection device with controllable jet flow velocity comprises a starting switch 1, a power source 2, a liquid cavity 3, a two-position three-way electromagnetic directional valve 4, an infusion tube 5 and a hose 6; the liquid cavity 3 is used for storing liquid medicine, the inlet and the outlet of the liquid cavity 3 are respectively connected with the inlet ends of a power source 2 and a two-position three-way electromagnetic directional valve 4, two outlet ends of the two-position three-way electromagnetic directional valve 4 are respectively connected with the inlets of a liquid conveying pipe 5 and a hose 6, the liquid conveying pipe 5 is a rigid pipe, the outlet of the hose 6 is communicated with the front part of the liquid conveying pipe 5, the power source 2 is used for pushing a piston in the liquid cavity 3 so as to provide power for injection, the power source 2 can set power according to the required jet speed, the control end of the two-position three-way electromagnetic directional valve 4 is connected with a delay relay 8, and a starting; when the starting switch 1 is started, the power source 2 and the time delay relay 8 are synchronously started, the two-position three-way electromagnetic directional valve 4 is switched to the position of the infusion tube 5, and when the set time of the time delay relay 8 is reached, the two-position three-way electromagnetic directional valve 4 is reset to the position of the hose 6. The infusion tube 5 and the hose 6 form two flow passages, the liquid medicine flows to the nozzle 7 from different flow passages through the switching of the two-position three-way electromagnetic directional valve 4, the energy loss magnitude of different flow passages is different, the jet speed of the outlet of the nozzle 7 is controlled, and the delay relay 8 is adopted, so that the jet speed in the jet hole forming stage and the liquid medicine diffusion stage can be accurately controlled, the rapid conversion of the jet speed in the needleless injection process is realized, the reaction time is short, the liquid medicine is prevented from splashing, the utilization rate of the liquid medicine is improved, and meanwhile, the risk of injection pain and tissue damage caused by over-deep injection is reduced.

As shown in fig. 1, in this embodiment, the delay relay 8 includes a normally closed contact switch 9 and an energization delay coil 10, and the starting switch 1, the normally closed contact switch 9, the energization delay coil 10, and the control end of the two-position three-way electromagnetic directional valve 4 are connected in sequence. When the starting switch 1 is started, the power-on time delay coil 10 is powered on to start timing, the normally closed contact switch 9 keeps a closed state, the two-position three-way electromagnetic directional valve 4 is switched to the position of the infusion tube 5, when the timing is finished, the normally closed contact switch 9 is switched off, the two-position three-way electromagnetic directional valve 4 is powered off, and the two-position three-way electromagnetic directional valve 4 is reset to the position of the hose 6.

In this embodiment, the length of the fluid chamber 3 is adjustable, as shown in figure 1, to control the dose injected.

As shown in fig. 2 and 3, in the present embodiment, the inlet and outlet of the hose 6 are respectively connected to the outlet end of the two-position three-way electromagnetic directional valve 4 and the bypass port at the front part of the infusion tube 5 through the anti-skid joint 11.

As shown in fig. 3, the main body of the two-position three-way electromagnetic directional valve 4 includes a valve seat 41, a spool 42, and a return spring 43.

The starting switch 1 can select switches in various forms such as a trigger, a button and the like according to different types of needleless injectors; the power source 2 can adopt driving devices such as a voice coil motor, compressed gas, an ultrasonic motor and the like according to actual conditions. In this embodiment, the infusion tube 5 is made of stainless steel, and the hose 6 is made of medical soft PVC. In this embodiment, the flexible tube 6 is replaceable, the flexible tube 6 has a plurality of groups of different lengths, and the flexible tubes 6 with different lengths can be selected according to different jet velocities in the liquid medicine diffusion stage.

A double-channel needleless injection method with controllable jet velocity adopts the double-channel needleless injection device with controllable jet velocity, and comprises the following steps:

s1) setting the power of the power source 2 and selecting the hose 6 of the corresponding length according to the required jet velocity;

s2) the two-position three-way electromagnetic directional valve 4 is initially positioned at the position of the hose 6, liquid medicine is added into the liquid cavity 3, the hose 6 is filled with the liquid medicine, the liquid medicine flows into the infusion tube 5, and a small amount of air still exists in the infusion tube 5;

s3) the two-position three-way electromagnetic directional valve 4 is switched to the position of the infusion tube 5, and the liquid medicine is continuously added to discharge the residual gas, so that the infusion tube 5 is filled with the liquid;

s4) setting the time of the delay relay 8;

s5) starting the starting switch 1, synchronously starting the power source 2 and the time delay relay 8, enabling the liquid medicine to flow through the liquid conveying pipe 5 by the power source 2 to be ejected from the nozzle 7 at a high jet speed by pushing a piston in the liquid cavity 3, resetting the two-position three-way electromagnetic directional valve 4 when the set time of the time delay relay 8 is reached, and ejecting the liquid medicine from the nozzle 7 at a low jet speed by flowing through the hose 6;

s6) the jet process is finished, the delay relay 8 is reset.

It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.