阅读说明：本技术 一种凸轮式活塞微流泵 (Cam type piston micro-flow pump ) 是由 张华丽 耿迁迁 张丁予 张明会 于 2021-10-29 设计创作，主要内容包括：本发明公开了一种凸轮式活塞微流泵,包括凸轮机构、注射器、微型泵、溶液室、推杆和吸管,所述的凸轮机构中的电机带动凸轮转动,从而推动推杆前后移动,通过推杆的移动从而带动注射器中的针管进行吸液和推液,用吸管连接注射器的针管和微型泵的进液端。本发明价格相对便宜,成本低,结构简单,适合给动、植物细胞培养提供源源不断的培养液。本发明中的凸轮机构只需要设计适当的凸轮轮廓,便可使从动件得到任意的预期运动,而且结构简单、紧凑、设计方便,因此在自动化。(The invention discloses a cam type piston micro-flow pump which comprises a cam mechanism, an injector, a micro-pump, a solution chamber, a push rod and a suction pipe, wherein a motor in the cam mechanism drives a cam to rotate so as to push the push rod to move back and forth, a needle tube in the injector is driven to suck and push liquid through the movement of the push rod, and the needle tube of the injector is connected with a liquid inlet end of the micro-pump through the suction pipe. The invention has the advantages of relatively low price, low cost and simple structure, and is suitable for providing continuous culture solution for animal and plant cell culture. The cam mechanism of the invention can lead the driven part to obtain any expected movement only by designing a proper cam profile, and has simple and compact structure and convenient design, thereby being automatic.)

1. A cam type piston micro-flow pump is characterized in that: comprises a cam mechanism (1), an injector (2), a micro pump (3), a solution chamber (4), a push rod (5) and a suction pipe (6);

the cam mechanism (1) is connected with the injector (2) through a push rod (5), the injector (2) is connected with the micro pump (3), the micro pump (3) is connected with the solution chamber (4), and a connecting port at one end of the push rod (5) is connected with a needle tube in the injector (2);

a motor in the cam mechanism (1) drives a cam to rotate so as to push a push rod (5) to move back and forth, the push rod (5) moves so as to drive a needle tube in the injector (2) to suck and push liquid, and a suction tube (6) is connected with the needle tube of the injector (2) and a liquid inlet end (33) of the micro pump (3);

the micro pump (3) further comprises a liquid inlet (31) and a liquid outlet (32), the liquid inlet (31) is connected with the solution chamber (4), liquid inlet and liquid outlet of the micro pump are driven by liquid suction and liquid pushing of a needle tube of the injector (2), when the micro pump (3) enters liquid, the liquid enters the upper end of the micro pump (3) from the lower end and is closed due to the pressure of the liquid inlet (31), and then the liquid enters a loop of the injector (2) from the lower end by liquid suction; when the push rod is pushed forward, the lower end is closed due to pressure, and liquid is discharged from a liquid outlet (32) at the upper end.

2. The cam piston micropump of claim 1, wherein: the injector (2) is fixed through a fixing block (7).

3. The cam piston micropump of claim 1, wherein: the needle tube of the injector (2) is fixed by a spring (8).

Technical Field

The invention belongs to the field of micro-flow pumps, and particularly relates to a cam type piston micro-flow pump.

Background

With the development of microfluidic technology, it has become a great development goal to have microfluidic pumps capable of precisely controlling the flow of liquids. The micro-flow pump is more and more emphasized by people in the fields of life medicine, medical health, mechanical engineering and the like, for example, the micro-flow pump is used for injecting medicines, 3D printing, cell screening and the like, for example, the portable micro-flow pump can be applied to a diabetic patient to inject insulin in real time by combining with micro-needles, so that the micro-flow pump is free from the pain caused by frequently injecting medicines with a needle cylinder.

The development of the micro-fluidic technology is fast nowadays, the micro-fluidic requirements are higher and higher at present, and how to realize the control better is the pursuit of many micro-fluidic workers. Various pumps have thus been invented. For example, the injection pump has the defects of high working pressure, pulse-free delivery and easy disinfection, and has the defects of limited delivery capacity and high price. The peristaltic pump has the advantages of disinfection, injection and recovery, low-pressure operation, pulse type delivery and high price.

The current microflow pump mainly adopts air pressure as driving force. The air pressure micro-flow pump drives liquid to flow by directly applying air pressure, the air pressure and the air inflow can be adjusted, the flow rate of the liquid can be adjusted, but the whole system is huge (an air source and the like need to be carried), and the air pressure micro-flow pump is mainly suitable for scientific research institutions, companies and hospitals. However, the size of the existing microfluidic pump is large, so that the size of the microfluidic pump is reduced, so that the microfluidic pump is convenient to carry about, and the development of the microfluidic pump has a greater potential in the aspects of medical health and large-scale integration.

Disclosure of Invention

The purpose of the invention is as follows: in order to solve the defects of the prior art, the invention provides a cam type piston micro-flow pump.

The technical scheme is as follows: a cam type piston micro-flow pump comprises a cam mechanism, an injector, a micro-pump, a solution chamber, a push rod and a suction tube;

the cam mechanism is connected with an injector through a push rod, the injector is connected with a micro pump, the micro pump is connected with a solution chamber, and a connecting port at one end of the push rod is connected with a needle tube in the injector;

a motor in the cam mechanism drives a cam to rotate so as to push a push rod to move back and forth, the push rod moves so as to drive a needle tube in the injector to suck and push liquid, and the needle tube of the injector is connected with a liquid inlet end of the micro pump through a suction tube;

the micro pump also comprises a liquid inlet and a liquid outlet, the liquid inlet is connected with the solution chamber, liquid inlet and liquid outlet of the micro pump are driven by liquid suction and liquid pushing of a needle tube of the injector, when the micro pump enters liquid, the liquid enters the upper end from the lower end of the micro pump, the upper end is closed due to the pressure of the liquid inlet, and the liquid enters a loop of the injector from the lower end; when the push rod is pushed forward, the lower end is closed due to pressure, and then liquid is discharged from the liquid outlet at the upper end.

As an optimization: the injector is fixed through a fixing block.

As an optimization: the needle tube of the injector is fixed by a spring.

Has the advantages that: the invention has the advantages of relatively low price, low cost and simple structure, and is suitable for providing continuous culture solution for animal and plant cell culture. The cam mechanism of the invention can lead the driven part to obtain any expected movement only by designing a proper cam profile, and has simple and compact structure and convenient design, thereby being automatic.

Drawings

FIG. 1 is a schematic overall structure of the present invention;

FIG. 2 is a schematic view of the construction of the micro-pump of the present invention;

FIG. 3 is a schematic structural view of the present invention;

FIG. 4 is a schematic of the outlet of the micro-pump of the present invention;

FIG. 5 is a schematic of the inlet of the micropump of the present invention;

FIG. 6 is a schematic view of the syringe of the present invention; .

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below so that those skilled in the art can better understand the advantages and features of the present invention, and thus the scope of the present invention will be more clearly defined. The embodiments described herein are only a few embodiments of the present invention, rather than all embodiments, and all other embodiments that can be derived by one of ordinary skill in the art without inventive faculty based on the embodiments described herein are intended to fall within the scope of the present invention.

Examples

As shown in fig. 1, a cam-type piston micropump includes a cam mechanism 1, a syringe 2, a micropump 3, a solution chamber 4, a push rod 5, and a suction tube 6.

The cam mechanism 1 is connected with an injector 2 through a push rod 5, the injector 2 is connected with a micro pump 3, the micro pump 3 is connected with a solution chamber 4, and a connecting port at one end of the push rod 5 is connected with a needle tube in the injector 2.

The motor in the cam mechanism 1 drives the cam to rotate, so that the push rod 5 is pushed to move back and forth, the needle tube in the injector 2 is driven to suck and push liquid through the movement of the push rod 5, and the needle tube of the injector 2 is connected with the liquid inlet end 33 of the micro pump 3 through the suction tube 6.

The micro pump 3 further comprises a liquid inlet 31 and a liquid outlet 32, the liquid inlet 31 is connected with the solution chamber 4, liquid inlet and liquid outlet of the micro pump are driven by liquid suction and liquid pushing of a needle tube of the injector 2, when the micro pump 3 feeds liquid, as shown in fig. 5, the liquid enters the upper end from the lower end of the micro pump 3, the upper end is closed due to the pressure of the liquid inlet 31, and then the liquid sucks liquid from the lower end and enters a loop of the injector 2; when the push rod is pushed forward, as shown in fig. 4, the lower end is closed due to the pressure, and liquid exits from the liquid outlet 32 at the upper end.

In this embodiment, as shown in fig. 6, the injector 2 is fixed by a fixing block 7, and the needle tube of the injector 2 is fixed by a spring 8.

The invention has the advantages of relatively low price, low cost and simple structure, and is suitable for providing continuous culture solution for animal and plant cell culture. The cam mechanism of the invention can lead the driven part to obtain any expected movement only by designing a proper cam profile, and has simple and compact structure and convenient design, thereby being automatic.