CN110386581A - Multichannel micro fluid high-precision bulking system - Google Patents

Abstract

The invention provides a multi-channel microfluid high-precision filling system, including a solution tank, a solution chamber and a cylinder. The inside of the solution chamber is a cylindrical chamber, and a partition is arranged inside to evenly divide the chamber into one or more filling chambers. The top of each filling chamber communicates with the solution tank through the liquid inlet pipe; the output shaft of the cylinder is connected to the piston rod, which is set horizontally and runs through each filling chamber inside the solution chamber. The piston rods in the filling chamber are provided with pistons in the circumferential direction; the pistons are in close contact with the inner wall of the filling chamber, and the remaining volume of each filling chamber is the same as the liquid volume to be filled in a single time; each filling The bottom of the chamber is connected with a liquid outlet nozzle. The invention has the advantages of simple structure, convenient operation, low equipment cost, high precision by adopting a piston-type push-flow structure, can realize the filling of trace fluid within 1ml, and has high filling efficiency.

Description

Multi-channel Micro Fluid High Precision Filling System

technical field

The invention relates to the technical field of microfluid filling, in particular to a multi-channel microfluid high-precision filling system.

Background technique

Liquid filling is widely used in food, pharmaceutical daily chemical, oil and other industries, and can fill different high-viscosity fluids. At present, there are mainly two types of filling machines with high degree of automation and filling accuracy, one is liquid level sensor metering filling, and the other is weighing metering filling.

However, it is difficult for common filling machines to achieve high precision for the filling of micro fluids, especially for micro fillings within 1ml, it is difficult to accurately control the flow rate. In addition, the price of each filling head of the filling machine currently available on the market that can achieve micro-volume and high-precision filling is very expensive. If multiple channels are required to be filled at the same time, the cost of the entire filling equipment is very high, and its combination and control It is also very troublesome, and it is difficult to realize the demand for multi-channel micro-quantity and high-precision simultaneous filling.

Contents of the invention

The purpose of the present invention is to provide a multi-channel micro-fluid high-precision filling system to solve the problem that the micro-volume high-precision filling equipment in the prior art is expensive and costly, and it is not easy to combine and control, and it is difficult to realize multi-channel micro fluid filling. The technical problem of the demand for high-precision simultaneous filling.

In order to achieve the above object, the present invention provides the following technical solutions:

A multi-channel microfluidic high-precision filling system, including a solution tank, a solution chamber and a cylinder. The inside of the solution chamber is a cylindrical chamber, and a partition is arranged inside to divide the chamber into one or more filling chambers evenly , the top of each filling chamber communicates with the solution tank through a liquid inlet pipe; the output shaft of the cylinder is connected to the piston rod, and the piston rod is arranged horizontally and runs through each of the solution chambers. Filling chambers, the piston rods in each of the filling chambers are provided with pistons in the circumferential direction; the pistons are in close contact with the inner walls of the filling chambers, and the remaining volume of each filling chamber is the same as that of a single The volume of liquid to be filled is the same; the bottom of each filling chamber is connected with a liquid outlet nozzle.

In a preferred embodiment, a one-way valve is arranged on the liquid inlet of the liquid outlet nozzle.

In a preferred embodiment, when the piston rod is pushed forward horizontally so that the piston is located at the front end of the filling chamber, the piston will block the liquid inlet at the top of the filling chamber, Squeeze out the solution from the liquid outlet nozzle; when the piston rod is reversely drawn so that the piston is located at the tail end of the filling chamber, the piston will open the liquid inlet at the top of the filling chamber, The liquid in the solution tank is drawn into the filling chamber.

In a preferred embodiment, each of the filling chambers is provided with a compressed air inlet for filling compressed air to make the liquid completely spray out, and a rubber stopper is provided on the compressed air inlet.

In a preferred embodiment, it also includes a support frame body, the support frame body includes a frame body and a base, the solution tank and the solution chamber are fixedly arranged on the frame body, and the solution chamber is located on the solution chamber. below the box.

In a preferred embodiment, a filling platform is further included, the filling platform is fixed on the supporting frame body and is located below the liquid outlet of the liquid outlet nozzle.

In a preferred embodiment, it also includes a PLC control system, the opening and closing solenoid valves are arranged on the liquid inlet pipeline, and the control ends of the opening and closing solenoid valves and the cylinder are connected with the PLC control system.

In a preferred embodiment, a conveyor belt is arranged on the filling platform, and the conveying mechanism of the conveyor belt is connected with the PLC control system.

The beneficial effect of the multi-channel microfluid high-precision filling system of the present invention is that it is not only simple in structure, convenient in operation, but also cheap in price and low in equipment cost. The piston-type push-flow structure is adopted, which has high precision and can realize microfluid filling within 1ml. In addition, the invention can also formulate multi-channel filling heads for simultaneous filling according to production requirements, with flexible operation and high efficiency. At the same time, after the fluid is extruded from the cavity, the system will use compressed air to blow out the remaining amount to ensure the filling accuracy, no residue, and will not affect the packaging.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic structural view of the multi-channel microfluid high-precision filling system of the present invention;

Fig. 2 is a schematic diagram of the internal structure of the solution chamber of the present invention.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

As shown in Figures 1-2, the multi-channel microfluid high-precision filling system of the present invention is illustrated, including a solution tank 1, a solution chamber and a cylinder 2. The inside of the solution chamber is a cylindrical cavity, and a partition 3 is arranged inside , the cavity is evenly divided into one or more filling chambers 4, and the top of each filling chamber 4 is communicated with the solution tank 1 through the liquid inlet pipe 7; the output shaft of the cylinder 2 is connected to Piston rod 5, the piston rod 5 is arranged horizontally, and runs through each filling chamber 4 inside the solution chamber, and a piston 6 is circumferentially arranged on the piston rod 5 in each filling chamber 4; The piston 6 is in close contact with the inner wall of the filling chamber 4, and makes the remaining volume of each filling chamber 4 the same as the liquid volume to be filled in a single time, as shown in Figure 2; The bottom of the chamber 4 is connected with a liquid outlet nozzle 9 .

In this embodiment, the liquid in the solution tank 1 flows into the solution chamber through the liquid inlet pipe 7, and the solution chamber can be divided into a plurality of filling chambers 4 by partitions 3 as required. In the accompanying drawing 1, it is divided into three chambers. A structural schematic diagram of a filling chamber 4, which includes three filling channels. The cylinder 2 drives the piston rod 5 to reciprocate in the horizontal direction, and the volume of each filling chamber 4 is the same as the volume of the liquid to be filled in a single time, that is, the key of this device is to precisely control each filling The size of the piston 6 in the chamber 4 further controls the size of the remaining volume in the filling chamber 4, so that the size of the remaining volume is the same as the volume of liquid to be filled in a single time. The piston rod 5 is pushed forward under the action of the cylinder 2, and the liquid in the filling chamber 4 is squeezed out through the liquid outlet nozzle 9 to realize micro-filling. When the piston rod 5 is pulled backward under the action of the cylinder 2 , the negative pressure inside the chamber draws the liquid in the solution tank 1 to the inside of the filling chamber 4, so that the piston rod 5 is drawn back and forth to realize the high-precision filling of mechanized microfluidics.

In a preferred embodiment, a one-way valve is provided on the liquid inlet of the liquid outlet nozzle 9, which is not shown in the figure. A one-way valve is arranged on the liquid outlet nozzle 9, so that when the piston rod 5 is pushed forward, the one-way valve is opened under the extrusion of the liquid, so that the liquid flows down, and when the piston rod 5 is pulled backward, the one-way valve is in the It is closed under the action of negative pressure, and then the liquid flowing into the filling chamber 4 from the solution tank 1 will not flow out from the liquid outlet nozzle 9, so that the single filling liquid flow rate is accurately controlled.

In a preferred embodiment, when the piston rod 5 is pushed forward in the horizontal direction so that the piston 6 is located at the front end of the filling chamber 4, the piston 6 pushes the top of the filling chamber 4 into the The liquid port is blocked, and the solution is extruded from the liquid outlet nozzle 9; when the piston rod 5 is reversely drawn so that the piston 6 is located at the tail end of the filling chamber 4, the piston 6 will fill the filling chamber. The liquid inlet at the top of the filling chamber 4 is opened, and the liquid in the solution tank 1 is drawn into the filling chamber 4 .

In a preferred embodiment, each of the filling chambers 4 is provided with a compressed air inlet for filling compressed air to make the liquid completely spray out, and rubber plugs are provided on the compressed air inlet. During operation, the compressed air inlet is filled with compressed air to ensure that the liquid in the filling chamber 4 is completely squeezed out, avoiding liquid residue inside the chamber, and further ensuring the accuracy of filling.

In a preferred embodiment, a support frame body is also included, the support frame body includes a frame body 11 and a base 12, the solution tank 1 and the solution chamber are fixedly arranged on the frame body 11, and the solution chamber Located below the solution tank 1. In this embodiment, both the solution tank 1 and the solution chamber are fixed on the support frame, thereby forming an integral filling device.

In a preferred embodiment, a filling platform 10 is also included, and the filling platform 10 is fixed on the supporting frame body and located below the liquid outlet of the liquid outlet nozzle 9 . Filling platform 10 is used to place equipment such as filling bottles.

In a preferred embodiment, it also includes a PLC control system, and the opening and closing solenoid valve 8 is arranged on the liquid inlet pipeline 7, and the control ends of the opening and closing solenoid valve 8 and the cylinder 2 are all connected with the PLC control system. connect. In this embodiment, a PLC control system is included to realize mechanized control of the entire filling device, and the control system controls the opening and closing switch of the solenoid valve and the operation of the cylinder 2 . The programming and storage of the PLC control system are the same as the control system in the prior art, which belongs to the conventional prior art in the field of mechanized automatic control, and will not be repeated here.

In a preferred embodiment, a conveyor belt is provided on the filling platform 10, and the conveying mechanism of the conveyor belt is connected with the PLC control system. The filling platform 10 can be equipped with a conveying mechanism, and the filling bottles and the like can be placed on the conveyor belt, and the mechanized operation can be realized through the conveyor belt. The pause time of the conveyor belt matches the single filling time pushed by the cylinder 2. This work can be realized through the programming of the PLC control system, and then realize the mechanized filling of the automatic control multi-channel microfluid high-precision filling system.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (8)

1. The multi-channel microfluidic high-precision filling system is characterized in that: it includes a solution tank, a solution chamber and a cylinder. The inside of the solution chamber is a cylindrical cavity, and a partition is arranged inside to divide the cavity evenly into one or A plurality of filling chambers, the top of each filling chamber communicates with the solution tank through a liquid inlet pipe; the output shaft of the cylinder is connected to the piston rod, and the piston rod is arranged horizontally and runs through the For each filling chamber inside the solution chamber, a piston is arranged circumferentially on the piston rod in each filling chamber; the piston is in close contact with the inner wall of the filling chamber, and makes each filling chamber The remaining volume of the chamber is the same as the volume of liquid to be filled once; the bottom of each filling chamber is connected with a liquid outlet nozzle. 2. The multi-channel microfluid high-precision filling system according to claim 1, characterized in that: a one-way valve is arranged on the liquid inlet of the liquid outlet nozzle. 3. The multi-channel micro-fluid high-precision filling system according to claim 1 or 2, characterized in that: when the piston rod is pushed forward in the horizontal direction so that the piston is located at the front end of the filling chamber, The piston seals the liquid inlet at the top of the filling chamber, and squeezes out the solution from the liquid outlet nozzle; when the piston rod is reversely pulled, the piston is positioned at the tail end of the filling chamber , the piston opens the liquid inlet at the top of the filling chamber, and draws the liquid in the solution tank into the filling chamber. 4. The multi-channel micro-fluid high-precision filling system according to claim 3, characterized in that: each of the filling chambers is provided with a compressed air inlet for filling compressed air to make the liquid spray completely out, and rubber plugs are set on the compressed air inlet. 5. The multi-channel microfluid high-precision filling system according to claim 1, 2 or 4, characterized in that: it also includes a support frame body, the support frame body includes a frame body and a base, the solution tank and the solution tank The cavities are all fixedly arranged on the frame body, and the solution cavity is located below the solution tank. 6. The multi-channel microfluidic high-precision filling system according to claim 5, characterized in that: it also includes a filling table, the filling table is fixed on the support frame body, and is located at the outlet nozzle Below the outlet of the tube. 7. The multi-channel microfluid high-precision filling system according to claim 6, characterized in that: it also includes a PLC control system, the opening and closing solenoid valves are arranged on the liquid inlet pipeline, and the opening and closing solenoid valves and the cylinder The control terminals are all connected with the PLC control system. 8. The multi-channel microfluid high-precision filling system according to claim 7, characterized in that: a conveyor belt is set on the filling table, and the conveying mechanism of the conveyor belt is connected with the PLC control system.