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CN-117380294-B - Microfluidic injection pump

CN117380294BCN 117380294 BCN117380294 BCN 117380294BCN-117380294-B

Abstract

The invention discloses a microfluidic injection pump which comprises a base, a transmission mechanism and a general fixing mechanism, wherein a touch screen is arranged on the base and used for controlling the microfluidic injection pump, the transmission mechanism comprises a driving assembly and an injection pushing block, the injection pushing block is arranged on the driving assembly and can drive the injection pushing block to move horizontally to push a piston rod of the injector to move, and the general fixing mechanism comprises an upper positioning seat and a lower positioning seat. The invention can firmly fix the syringes with any specification and any shape, does not cause any damage or deformation to the syringes when fixing the syringes, effectively avoids the condition that the use precision of the microfluidic syringe pump is reduced due to shaking and damage deformation of the syringes, and simultaneously can automatically fix a plurality of groups of syringes with different specifications and shapes without excessive manual operation, thereby saving time and labor and improving the use efficiency of the microfluidic syringe pump.

Inventors

  • ZHANG ZHIWEI
  • ZHANG SHUANGYI

Assignees

  • 江苏集萃中科纳米科技有限公司

Dates

Publication Date
20260505
Application Date
20231011

Claims (7)

  1. 1. A microfluidic injection pump, which comprises a pump body, characterized by comprising the following steps: the base is provided with a touch screen which is used for controlling the use of the microfluidic injection pump; the transmission mechanism comprises a driving assembly and an injection pushing block, the injection pushing block is arranged on the driving assembly, and the driving assembly can drive the injection pushing block to move horizontally so as to push the piston rod of the injector to move; the universal fixing mechanism comprises an upper positioning seat and a lower positioning seat, wherein the upper positioning seat is positioned above the lower positioning seat, and a lifting adjusting structure is arranged between the upper positioning seat and the lower positioning seat; The upper positioning seat is also provided with an inflatable compression assembly which can be used for compressing and fixing injectors with different shapes and sizes through random inflation deformation, and the lower positioning seat is also provided with a negative pressure adsorption positioning assembly which is used for pre-positioning and fixing the injectors; The driving assembly comprises a fixing seat, a driving motor, a translation screw rod and a horizontal sliding rod, wherein the fixing seat is fixedly connected to the top end of the base, a plurality of groups of driving motors are arranged on the fixing seat, one end of the translation screw rod is fixedly connected with the output end of the driving motor, the injection pushing block is in threaded connection with the translation screw rod, a plurality of groups of horizontal sliding rods are fixedly connected to the fixing seat, one end of each horizontal sliding rod penetrates through the injection pushing block, and the injection pushing blocks are in sliding connection with the horizontal sliding rods; The lifting adjusting structure comprises a lifting screw rod and vertical sliding rods, the bottom end of the lifting screw rod is rotatably connected to the lower positioning seat, the top end of the lifting screw rod penetrates through the upper positioning seat, the lifting screw rod is in threaded connection with the upper positioning seat, a plurality of groups of vertical sliding rods are fixedly connected to the lower positioning seat, the top end of each vertical sliding rod penetrates through the upper positioning seat, and the vertical sliding rods are in sliding connection with the upper positioning seat; The inflatable compression assembly comprises an inflation inlet and compression air bags, a plurality of groups of the inflation inlet are arranged at the bottom of the upper positioning seat, the compression air bags are fixedly connected to the bottom end of the inflation inlet, one side of the upper positioning seat is fixedly connected with an inflation pipeline, and one end of the inflation pipeline is fixedly connected with an air pump.
  2. 2. The microfluidic syringe pump of claim 1 wherein the syringe push block is provided with a limit slot.
  3. 3. The microfluidic syringe pump of claim 1 wherein a knob is fixedly connected to the top end of the lifting screw.
  4. 4. The microfluidic syringe pump of claim 1 wherein a first pressure sensor is fixedly connected to the interior of the upper positioning seat.
  5. 5. The microfluidic syringe pump of claim 1, wherein the negative pressure adsorption positioning assembly comprises a placing groove, an adsorption air bag and an extraction opening, a plurality of groups of the placing groove are formed in the lower positioning seat, the adsorption air bag is fixedly connected to the inside of the placing groove, a plurality of groups of adsorption holes are formed in the adsorption air bag, the extraction opening is formed in the inside of the placing groove and used for communicating the lower positioning seat with the inside of the adsorption air bag, one side of the lower positioning seat is fixedly connected with an extraction pipeline, and one end of the extraction pipeline is fixedly connected with the input end of the air pump.
  6. 6. The microfluidic syringe pump of claim 5, wherein the pumping tube is further fixedly connected with a branch tube, and the branch tube is provided with an electromagnetic valve.
  7. 7. The microfluidic syringe pump of claim 5, wherein a second pressure sensor is fixedly connected to the interior of the lower positioning seat.

Description

Microfluidic injection pump Technical Field The invention relates to the technical field of microfluidics, in particular to a microfluidic injection pump. Background In recent years, microfluidic technology is considered to have great development potential and wide application prospects in biomedical research. The microfluidic injection pump is a common instrument for carrying out uniform microinjection for a long time in life science research, and can greatly reduce the labor intensity of staff when reasonably used in experiments, and accurately control the use amount of various reagents. Syringe pumps are often used in microfluidic systems as a motive force to drive fluids into or out of microfluidic channels. At present, the microfluidic injection pump mainly realizes accurate control of the use amount of various reagents by accurately controlling the movement of a piston rod of an injector. Each microfluidic syringe pump requires a syringe of any size that can be produced by any manufacturer. In the actual use process, although most of the syringes can be fixedly used through the clamp carried on the syringe pump, the fixing force of the clamp on the syringes cannot be too large, otherwise, the syringes can be deformed, if the fixing force is too small, the syringes can shake easily, and the control precision of fluid reagents can be influenced by the fixing force, so that the clamp on the syringe pump is difficult to firmly fix the syringes with different specifications, particularly when the syringes with too small, too large or special shapes are encountered, the syringes are difficult to firmly fix, the use precision of the microfluidic syringe pump is greatly reduced, manual operation is needed for fixing the syringes, time and labor are wasted when the syringes with multiple groups are fixed, and the use efficiency of the microfluidic syringe pump is greatly reduced. Therefore, in view of the above technical problems, it is necessary to provide a microfluidic syringe pump. Disclosure of Invention The invention aims to provide a microfluidic injection pump, which can solve the problems that syringes with different specifications are difficult to fix firmly, and the use precision and the use efficiency of the microfluidic injection pump are greatly reduced. In order to achieve the above purpose, the embodiment of the invention provides a microfluidic injection pump, which comprises a base, a transmission mechanism and a universal fixing mechanism; the base is provided with a touch screen which is used for controlling the use of the microfluidic injection pump; The transmission mechanism comprises a driving assembly and an injection pushing block, the injection pushing block is arranged on the driving assembly, and the driving assembly can drive the injection pushing block to move horizontally to push the piston rod of the injector to move; the universal fixing mechanism comprises an upper positioning seat and a lower positioning seat, wherein the upper positioning seat is positioned above the lower positioning seat, and a lifting adjusting structure is arranged between the upper positioning seat and the lower positioning seat; the upper positioning seat is further provided with an inflatable expansion compressing assembly, the inflatable expansion compressing assembly can compress and fix syringes of different shapes and sizes through random expansion deformation, the lower positioning seat is further provided with a negative pressure adsorption positioning assembly, and the negative pressure adsorption positioning assembly is used for fixing the syringes in a preset position. In one or more embodiments of the present invention, the driving assembly includes a fixing seat, a driving motor, a translation screw rod and a horizontal sliding rod, the fixing seat is fixedly connected to the top end of the base, the driving motor is provided with a plurality of groups on the fixing seat, one end of the translation screw rod is fixedly connected to the output end of the driving motor, the injection pushing block is in threaded connection with the translation screw rod, the horizontal sliding rod is fixedly connected with a plurality of groups on the fixing seat, one end of the horizontal sliding rod penetrates through the injection pushing block, and the injection pushing block is in sliding connection with the horizontal sliding rod. In one or more embodiments of the present invention, the injection pushing block is provided with a limit groove. In one or more embodiments of the present invention, the lifting adjustment structure includes a lifting screw rod and a vertical sliding rod, the bottom end of the lifting screw rod is rotatably connected to the lower positioning seat, the top end of the lifting screw rod penetrates through the upper positioning seat, the lifting screw rod is in threaded connection with the upper positioning seat, the vertical sliding rod is fixedly connected with a plurality of