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CN-224221381-U - Accurate liquid drop partial shipment device based on micro-fluidic technology

CN224221381UCN 224221381 UCN224221381 UCN 224221381UCN-224221381-U

Abstract

The utility model relates to the technical field of liquid drop split charging, in particular to a precise liquid drop split charging device based on a microfluidic technology. According to the utility model, through the arrangement of the pressure relief holes and the fine gauze, after the liquid is extruded into the needle tube from the liquid spray head by the liquid dispenser, the liquid spray head can effectively improve the liquid spraying effect after contacting the spun gauze, and the liquid can be effectively filtered through the fine gauze, so that dust is prevented from influencing the normal use of the liquid spray head, the working procedure of extruding the liquid through the liquid spray head can directly influence the air pressure in the needle tube, the resistance of the air pressure in the needle tube can be effectively reduced under the cooperation of a plurality of pressure relief holes, the liquid spraying efficiency is improved, the liquid can be reduced to remain in the needle tube with the help of the pressure relief holes, the accumulation and the generation of liquid discharging errors are further reduced, and the phenomenon of errors in liquid discharging is solved.

Inventors

  • XU XIAONAN
  • YANG JUNXIAN
  • SONG RUYUAN

Assignees

  • 深圳达普生物科技有限公司

Dates

Publication Date
20260512
Application Date
20250530

Claims (7)

  1. 1. The accurate liquid drop split charging device based on the micro-fluidic technology comprises a liquid dispenser (1), a liquid conveying pipe (2) arranged at the top of the liquid dispenser (1), a placement end (3) arranged at the bottom of the liquid dispenser (1) and a needle tube (4) arranged in the placement end (3), and is characterized by further comprising; The pressure relief assembly comprises a plurality of pressure relief holes (401) arranged on the side wall of the needle tube (4), a plurality of dustproof software (402) arranged on the outer wall of the needle tube (4) and an extrusion assembly arranged in the needle tube (4); the filtering component is arranged on the inner wall of the needle tube (4).
  2. 2. The precise liquid drop dispensing apparatus based on the microfluidic technology of claim 1, wherein the extrusion assembly comprises a flexible hose (5) arranged at the bottom end of the placement end (3) and a liquid spray head (501) arranged at the bottom of the flexible hose (5).
  3. 3. The precise liquid drop split charging device based on the micro-fluidic technology according to claim 1, wherein the filtering component comprises a fixed body (6) symmetrically arranged on the inner wall of the needle tube (4), a spun yarn net (601) arranged on the fixed body (6) and an elastic component arranged on the fixed body (6).
  4. 4. The precise liquid drop split charging device based on the micro-fluidic technology according to claim 3, wherein the elastic component comprises fixing columns (602) symmetrically arranged on the side walls of the fixing body (6), spring pull rods (603) arranged at the bottoms of the fixing columns (602), and connecting fixing pieces (604) fixedly connected with the spun yarn net (601).
  5. 5. The precise liquid drop split charging device based on the microfluidic technology according to claim 1, wherein a supporting component is arranged in the needle tube (4), and the supporting component comprises rubber corner bodies (403) symmetrically arranged on the inner wall of the needle tube (4) and rubber pressing bodies (404) arranged on the side walls of the rubber corner bodies (403).
  6. 6. The precise liquid drop split charging device based on the microfluidic technology according to claim 5, wherein the rubber corner body (403) is provided with a tight propping assembly, and the tight propping assembly comprises a butyl rubber plug sheet (405) arranged on the side wall of the rubber corner body (403).
  7. 7. The precise liquid drop split charging device based on the micro-fluidic technology according to claim 1, wherein a guide assembly is arranged in the needle tube (4), and the guide assembly comprises a drainage port (407) symmetrically arranged at the bottom of the needle tube (4) and a plurality of anti-scattering needles (408) arranged on the drainage port (407).

Description

Accurate liquid drop partial shipment device based on micro-fluidic technology Technical Field The utility model relates to the technical field of liquid drop split charging, in particular to a precise liquid drop split charging device based on a microfluidic technology. Background A dispenser is a common tool used in laboratories to accurately separate and transfer liquids (e.g., oil-water mixtures) that are not compatible with each other. The main body of the glass container is a pear-shaped or spherical glass container, the top is provided with a grinding plug, and the lower end is provided with a piston for controlling the flow rate. Microfluidic is a technique for manipulating micro-or nano-scale fluids to achieve precise fluid control, mixing, reaction, or separation through micro-scale channels. The method is widely applied to the fields of biological detection, chemical synthesis, drug screening and the like, has the advantages of high efficiency, low consumption, high flux and the like, and is a core technology of a chip laboratory. The liquid dispenser is added on the basis of micro-flow control, the liquid dispenser is improved to effectively discharge different types of liquid, meanwhile, the micro-flow control technology can increase the fineness degree of liquid discharge, the error of liquid discharge is controlled to be minimum, the micro-flow control increases the split charging efficiency of the liquid dispenser on the basis, but the needle tube of the liquid dispenser belongs to a narrow component, after liquid discharge, partial liquid cannot be discharged due to internal air pressure, the volume of the next liquid discharge can be influenced after accumulation for many times, liquid discharge error is formed, and meanwhile, the air pressure in the needle tube cannot be normally discharged, so that the phenomenon of liquid discharge error occurs for many times in the needle tube. Therefore, we design a precise droplet split charging device based on the microfluidic technology. Disclosure of utility model The utility model aims to solve the problem of liquid discharge error caused by the air pressure problem in the prior art, and provides a precise liquid drop split charging device based on a microfluidic technology. In order to achieve the above purpose, the present utility model adopts the following technical scheme: The accurate liquid drop split charging device based on the microfluidic technology comprises a liquid dispenser, a liquid conveying pipe arranged at the top of the liquid dispenser, a placing end arranged at the bottom of the liquid dispenser, a needle tube arranged in the placing end, and further comprises a liquid storage device, a liquid storage device and a liquid storage device; The pressure relief assembly comprises a plurality of pressure relief holes arranged on the side wall of the needle tube, a plurality of dustproof software arranged on the outer wall of the needle tube and an extrusion assembly arranged in the needle tube; the filtering component is arranged on the inner wall of the needle tube. Preferably, the extrusion assembly comprises a flexible hose arranged at the bottom end of the placement end and a liquid spray head arranged at the bottom of the flexible hose. Preferably, the filter assembly comprises a fixed body symmetrically arranged on the inner wall of the needle tube, a spun yarn net arranged on the fixed body and an elastic assembly arranged on the fixed body. Preferably, the elastic component comprises fixing columns symmetrically arranged on the side wall of the fixing body, a spring pull rod arranged at the bottom of the fixing columns and a connecting fixing piece fixedly connected with the spun yarn net. Preferably, the needle tube is internally provided with a supporting component, and the supporting component comprises rubber corner bodies symmetrically arranged on the inner wall of the needle tube and rubber pressing bodies arranged on the side walls of the rubber corner bodies. Preferably, the rubber corner body is provided with a tight supporting component, and the tight supporting component comprises a butyl rubber plug sheet arranged on the side wall of the rubber corner body. Preferably, a guide assembly is arranged in the needle tube, and the guide assembly comprises a drainage port symmetrically arranged at the bottom of the needle tube and a plurality of anti-scatter needles arranged on the drainage port. The beneficial effects of the utility model are as follows: 1. According to the utility model, through the arrangement of the pressure relief holes and the fine gauze, after the liquid is extruded into the needle tube from the liquid spray head by the liquid dispenser, the liquid spray head can effectively improve the liquid spraying effect after contacting the spun gauze, and the liquid can be effectively filtered through the fine gauze, so that dust is prevented from influencing the normal use of the liquid spray head, the w