Multi-channel micro-fluidic chip structure

Abstract

The utility model discloses a multi-channel micro-fluidic chip structure, which comprises an upper cover and a lower cover, an injection port is arranged on the front side of the lower cover, a main channel is arranged on the upper side of the lower cover, a plurality of branch channels are arranged on the upper side of the lower cover and positioned on the rear side of the main channel, a control unit is arranged on the upper side of the lower cover, and the injection port is communicated with the main channel. The control unit comprises a first sealing plate, the first sealing plate is arranged on the inner side of the main flow channel, a top plate is fixedly connected to the upper side of the first sealing plate, a first mounting groove and a second mounting groove are formed in the upper side of the lower cover, and a first micro electric push rod is fixedly connected to the inner side of the first mounting groove and fixedly connected with the top plate. And by arranging a first micro electric push rod, a second micro electric push rod, a first sealing plate and a second sealing plate, when multiple samples flow into the corresponding sub-runners, the samples are conveniently controlled to be blocked, and the situation that the detection precision is affected due to intersection of multiple flows is avoided.

Description

Technical Field

[0001] The utility model relates to the field of microfluidic chips, in particular to a multi-channel microfluidic chip structure. Background Art

[0002] Microfluidics chips are a highly advanced technology that allows scientists to precisely manipulate fluids at the micrometer scale to conduct a variety of chemical, biological and other types of experiments.

[0003] A flow channel is provided in the microfluidic chip to facilitate guiding the sample flow channel for detection in the detection cavity. When detecting the mineral components in the liquid, the sample is passed into the flow channel in the chip. When multiple samples need to be detected, multiple sample liquids need to be injected. Multiple sample liquids are prone to cross-contamination during transportation, which reduces the detection accuracy of the sample and makes the detection results inaccurate. Utility Model Content

[0004] In order to overcome the disadvantage of the prior art that when multiple flow channels are used, multiple flow rates are prone to crossover, one of the purposes of the utility model is to provide a multi-channel microfluidic chip structure.

[0005] One of the purposes of the utility model is achieved by the following technical solution: a multi-channel microfluidic chip structure, comprising an upper cover and a lower cover: an injection port is provided on the front side of the lower cover, a main channel is provided on the upper side of the lower cover, a plurality of branch channels are provided on the upper side of the lower cover and located at the rear side of the main channel, and a control unit is provided on the upper side of the lower cover;

[0006] The control unit includes a sealing plate 1, which is arranged on the inner side of the main flow channel, and the upper side of the sealing plate 1 is fixedly connected to a top plate, and the upper side of the lower cover is provided with a mounting groove 1 and a mounting groove 2, and the inner side of the mounting groove 1 is fixedly connected to a micro electric push rod 1, and the micro electric push rod 1 is fixedly connected to the top plate, and the inner sides of the plurality of branch flow channels are all provided with a sealing plate 2, and the inner side of the mounting groove 2 is fixedly connected to a micro electric push rod 2, and the upper end of the micro electric push rod 2 is fixedly connected to a control board, and the front side of the control board is fixedly connected to a plurality of electromagnets.

[0007] According to the multi-channel microfluidic chip structure, the second sealing plate is made of metal material.

[0008] According to the multi-channel microfluidic chip structure, the electromagnet is located on the upper side of the second sealing plate.

[0009] According to the multi-channel microfluidic chip structure, the sealing plate 1 is slidably connected to the main channel.

[0010] According to the multi-channel microfluidic chip structure, an inverter is provided between the first micro electric push rod and the second micro electric push rod, so as to facilitate the control of the movement of the first sealing plate and the second sealing plate.

[0011] According to the multi-channel microfluidic chip structure, the second sealing plate is slidably connected to the branch channel.

[0012] Beneficial effects:

[0013] By providing the micro electric push rod 1, the micro electric push rod 2, the sealing plate 1 and the sealing plate 2, it is convenient to control the flow of multiple samples into the corresponding branch channels, block the samples, and avoid the intersection of multiple flows to affect the accuracy of detection.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0016] Figure 1 This is an overall three-dimensional structural diagram of a multi-channel microfluidic chip structure of the utility model;

[0017] Figure 2 This is a three-dimensional structural diagram of a multi-channel microfluidic chip structure of the utility model with the upper cover removed;

[0018] Figure 3 This is a sectional three-dimensional structural diagram of a multi-channel microfluidic chip structure of the utility model with the upper cover removed;

[0019] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0020] Legend:

[0021] 1. Upper cover; 2. Lower cover; 3. Inlet; 4. Main channel; 5. Branch channel; 6. Control unit; 601. Closing plate 1; 602. Mounting slot 1; 603. Micro electric push rod 1; 604. Top plate; 605. Closing plate 2; 606. Electromagnet; 607. Control board; 608. Mounting slot 2; 609. Micro electric push rod 2. DETAILED DESCRIPTION

[0022] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0023] Reference Figure 1-4 A multi-channel microfluidic chip structure includes an upper cover 1 and a lower cover 2: an injection port 3 is opened on the front side of the lower cover 2, a main channel 4 is opened on the upper side of the lower cover 2, a plurality of branch channels 5 are opened on the upper side of the lower cover 2 and located behind the main channel 4, and a control unit 6 is arranged on the upper side of the lower cover 2, through the main channel 4 and the plurality of branch channels 5, it is convenient to detect a variety of samples.

[0024] The control unit 6 includes a sealing plate 601, which is arranged on the inner side of the main flow channel 4. The upper side of the sealing plate 601 is fixedly connected to a top plate 604. The upper side of the lower cover 2 is provided with a mounting groove 602 and a mounting groove 608. The inner side of the mounting groove 602 is fixedly connected to a micro electric push rod 603. The micro electric push rod 603 is fixedly connected to the top plate 604. The inner sides of the plurality of branch flow channels 5 are all provided with sealing plates 605. The inner sides of the mounting grooves 608 are fixed. A micro electric push rod 609 is connected, the upper end of the micro electric push rod 609 is fixedly connected to a control board 607, and a plurality of electromagnets 606 are fixedly connected to the front side of the control board 607. The sealing plate 605 is made of metal material, and the electromagnets 606 are located on the upper side of the sealing plate 605. The sealing plate 601 is slidably connected to the main channel 4, and the sealing plate 605 is slidably connected to the branch channel 5. An inverter is arranged between the micro electric push rod 603 and the micro electric push rod 609. , inverter, so that the movement directions of micro electric push rod 1 603 and micro electric push rod 2 609 are opposite. When injecting the sample, the sample solution enters the main channel 4, and this micro electric push rod 1 603 drives the top plate 604 to rise, and the top plate 604 replaces the sealing plate 1 601 to rise, so that the sample in the main channel 4 flows into the connecting channel between the main channel 4 and the branch channel 5. Before injecting another sample solution, the micro electric push rod 1 603 drives the sealing plate 1 601 to descend, and under the action of the inverter, the micro electric push rod 2 609 drives the control board 607 to rise, and the control board 607 drives the electromagnet 606 to rise. It is necessary to control the injected sample solution to flow into the required branch channel 5, control the corresponding electromagnet 606 to be energized, and connect the electromagnet 606 to the sealing plate 2 605, so as to control the corresponding branch channel 5 to open. At this time, the sealing plate 1 601 blocks the solution inside the main channel 4 to avoid the intersection of multiple solutions and affect the detection results.

[0025] Working principle: When in use, the sample liquid is injected into the main channel 4 through the injection port 3. At this time, the sealing plate 601 rises to allow the sample solution to flow into the connecting channel between the main channel 4 and the branch channel 5. The micro-electric push rod 603 drives the sealing plate 601 to descend to block the main channel 4. At the same time, the micro-electric push rod 609 drives the electromagnet 606 to distribute the solution to the corresponding branch channel 5. At this time, the sealing plate 601 blocks another sample solution in the main channel 4 to avoid the intersection of multiple solutions.

[0026] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A multi-channel microfluidic chip structure, characterized in that: The invention comprises an upper cover (1) and a lower cover (2): an injection port (3) is provided on the front side of the lower cover (2), a main flow channel (4) is provided on the upper side of the lower cover (2), a plurality of branch flow channels (5) are provided on the upper side of the lower cover (2) and located behind the main flow channel (4), and a control unit (6) is provided on the upper side of the lower cover (2); The control unit (6) includes a sealing plate (601), which is arranged on the inner side of the main flow channel (4), and the upper side of the sealing plate (601) is fixedly connected to a top plate (604). The upper side of the lower cover (2) is provided with a mounting groove (602) and a mounting groove (608). The inner side of the mounting groove (602) is fixedly connected to a micro electric push rod (603), and the micro electric push rod (603) is fixedly connected to the top plate (604). The inner sides of the plurality of branch flow channels (5) are all provided with sealing plates (605), and the inner side of the mounting groove (608) is fixedly connected to a micro electric push rod (609), and the upper end of the micro electric push rod (609) is fixedly connected to a control board (607), and the front side of the control board (607) is fixedly connected to a plurality of electromagnets (606).

2. A multi-channel microfluidic chip structure according to claim 1, characterized in that: The second sealing plate (605) is made of metal material.

3. A multi-channel microfluidic chip structure according to claim 1, characterized in that: The electromagnet (606) is located on the upper side of the second sealing plate (605).

4. The multi-channel microfluidic chip structure according to claim 1, characterized in that: The sealing plate 1 (601) is slidably connected to the main channel (4).

5. The multi-channel microfluidic chip structure according to claim 1, characterized in that: An inverter is provided between the micro electric push rod 1 (603) and the micro electric push rod 2 (609).

6. The multi-channel microfluidic chip structure according to claim 1, characterized in that: The second sealing plate (605) is slidably connected to the branch channel (5).

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