Nanoliter pump

Abstract

The utility model provides a nanoliter pump, which relates to the technical field of nanoliter pumps, and comprises a control instrument and a nanoliter pump main body, one end of a tubular shell is provided with a rear end cover, the end part of the rear end cover is connected with a wire tail gland, the end part of the wire tail gland is provided with a cable protective sleeve in a penetrating manner, the other end of the tubular shell is provided with a protective sleeve, and the end part of the protective sleeve is provided with a driving shell; a needle sleeve is arranged at the end part of the driving shell, a needle clamping cap is arranged at the end part of the needle sleeve, the end part of the needle clamping cap penetrates through the surface of the glass needle main body, a nano-lift pump interface is formed in the side surface of the control instrument, and an equipment interface on the surface is connected with all equipment for testing, so that a multi-split structure test is realized; according to the nano-liter pump, flow control of liquid is achieved, the injection precision of 0.01 nano-liter can be achieved by controlling the movement lead of the piston, high-precision, high-repeatability and high-reliability liquid guiding operation of the nano-liter pump body is achieved, and accurate liquid conveying can be achieved in different occasions.

Description

Technical Field

[0001] The utility model relates to the technical field of nanoliter pumps, in particular to a nanoliter pump. Background Art

[0002] According to the nanoliter metering pump disclosed by Chinese patent number CN210317636U, it includes a seat body, a cylinder body, a plunger rod, a plunger, a driving device, a feed pipe and a discharge pipe. The plunger is fixed on the plunger rod. The front end of the cylinder body is provided with a front feed port and a front discharge port, and the rear end of the cylinder body is provided with a rear feed port and a rear discharge port. The front feed port is provided with a front feed switch valve, the front discharge port is provided with a front discharge switch valve, the rear feed port is provided with a rear feed switch valve, and the rear discharge port is provided with a rear discharge switch valve. The outlet of the feed pipe is respectively connected with the front feed switch valve and the rear feed switch valve, and the inlet of the discharge pipe is respectively connected with the front discharge switch valve and the rear discharge switch valve. The utility model has the following advantages: it can realize continuous output of fluid, there is no shear force on the fluid, the flow rate and output of the fluid can be controlled with high precision, and the nanoliter metering pump can be quickly cleaned.

[0003] The above-mentioned comparative documents and prior art have the problem that the entire nanoliter injection pump has a complex structure, resulting in high manufacturing costs and difficult operation. At the same time, the existing nanoliter pumps have low applicability and injection accuracy and cannot meet the needs of multi-scenario injection and high-precision injection. Utility Model Content

[0004] The utility model aims to solve the shortcomings of the prior art such as complex structure, difficult operation and low applicability and precision, and proposes a nanoliter pump.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a nanoliter pump, including a control instrument and a nanoliter pump body, the nanoliter pump body including a tubular shell and a glass needle body, a rear end cover is provided at one end of the tubular shell, a wire tail pressure cover is connected to the end of the rear end cover, a cable protective cover is passed through the end of the wire tail pressure cover, a protective sleeve is provided at the other end of the tubular shell, a drive shell is provided at the end of the protective sleeve, a needle sleeve is provided at the end of the drive shell, a needle clamp cap is provided at the end of the needle sleeve, the end of the needle clamp cap passes through the surface of the glass needle body, and a nanoliter pump interface is provided on the side of the control instrument.

[0006] Preferably, a transfer PCB board is provided inside one end of the tubular housing close to the cable protective cover, a zero point sensor is provided on the side of the transfer PCB board, a stepper motor is connected to the side of the zero point sensor, and an injection needle mounting rod is connected to the output shaft of the stepper motor.

[0007] Preferably, an injection needle body is inserted into the surface of the injection needle mounting rod, an injection needle sealing ring is provided at the end of the injection needle body, an injection needle limiting spacer is provided on the surface of the injection needle sealing ring, the surface of the injection needle limiting spacer is connected to the end of the glass needle body, and a glass needle sealing ring is provided at the connecting edge between the glass needle body and the surface of the injection needle limiting spacer.

[0008] Preferably, a side mounting block is bolted to a side of the tubular housing, a clamping rod is passed through the surface of the side mounting block, and a clamping cap is provided at the end of the clamping rod.

[0009] Preferably, an indicator light ring is provided at the connecting edge between the rear end cover and the wire tail pressure cover, and a decorative color ring is provided at the connecting edge between the tubular shell and the protective tube sleeve.

[0010] Preferably, a display panel is provided on the front of the control instrument, a plurality of device interfaces are provided in a linear array on the back of the control instrument, and the nanoliter pump interface is located on one side of the back of the control instrument.

[0011] Preferably, the cable protective cover, rear end cover, wire tail pressure cover, tubular housing, protective sleeve, drive housing, needle sleeve and needle clamping cap are all coaxial rotating body structures.

[0012] Beneficial Effects

[0013] In the utility model, after the control instrument is connected to the nanoliter pump body, various devices can be connected through the device interface on the surface for testing and use, realizing one-to-many structure testing, and the flow of liquid can be controlled by the piston movement of the stepper motor inside the nanoliter pump body. The injection accuracy of 0.01 nanoliter can be achieved by controlling the movement lead of the piston, realizing high-precision, high-repeatability and high-reliability liquid guide operation of the nanoliter pump body, and can achieve accurate liquid delivery in different occasions. It has a simple structure, low cost and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0015] Figure 2 This is a structural diagram of the nanoliter pump of the utility model;

[0016] Figure 3 This is a front cross-sectional view of the nanoliter pump of the utility model;

[0017] Figure 4 For the utility model Figure 3 A magnified image of point A;

[0018] Figure 5 This is a structural diagram of the control instrument of the present utility model.

[0019] Legend:

[0020] 1. Control instrument; 2. Display panel; 3. Nanoliter pump interface; 4. Equipment interface; 5. Nanoliter pump body; 501. Cable protection cover; 502. Wire tail pressure cover; 503. Indicator light ring; 504. Rear cover; 505. Side mounting block; 506. Clamping cap; 507. Clamping rod; 508. Tubular housing; 509. Protective sleeve; 510. Decorative color ring; 511. Drive housing; 512. Needle sleeve; 513. Needle clamping cap; 514. Glass needle body; 515. Adapter PCB board; 516. Zero point sensor; 517. Stepper motor; 518. Injection needle mounting rod; 519. Injection needle sealing ring; 520. Injection needle limit spacer; 521. Glass needle sealing ring; 522. Injection needle body. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments and drawings, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0022] The specific embodiments of the present utility model are described below in conjunction with the accompanying drawings. Specific embodiment one:

[0024] Reference Figure 1-5 A nanoliter pump comprises a control instrument 1 and a nanoliter pump body 5. A nanoliter pump interface 3 is provided on the side of the control instrument 1, a display panel 2 is provided on the front of the control instrument 1, and a plurality of device interfaces 4 are provided in a linear array on the back of the control instrument 1. The nanoliter pump interface 3 is located on one side of the back of the control instrument 1. In actual use, the end of the nanoliter pump body 5 is connected to the control instrument 1 through the nanoliter pump interface 3. The range, accuracy, reciprocating time, injection liquid volume, etc. of the nanoliter pump are controlled by the control instrument 1. Through the plurality of device interfaces 4 provided on the back of the control instrument 1, special process control suitable for injection in various scenarios is performed externally, such as the needle retention function and anti-blocking test function unique to mouse and rat virus injection, a special program for ultra-slow and precise injection for brown planthopper and worm injection, and a special program for combined injection of arbitrary amounts of multiple injection heads at the same time and separate injection of different amounts at different times. The system can store more than ten conventional combination programs, making the customer's injection operation simple and easy, and has humanized voice and text prompts.

[0025] When the nanoliter pump is actually used, the outside specifically includes the following connection structure: the nanoliter pump body 5 includes a tubular shell 508 and a glass needle body 514; a rear end cover 504 is provided at one end of the tubular shell 508; a wire tail pressure cover 502 is connected to the end of the rear end cover 504; a cable protective cover 501 is passed through the end of the wire tail pressure cover 502; a protective sleeve 509 is provided at the other end of the tubular shell 508; a driving shell 511 is provided at the end of the protective sleeve 509; a needle sleeve 512 is provided at the end of the driving shell 511; a needle clamping cap 513 is provided at the end of the needle sleeve 512; the end of the needle clamping cap 513 passes through the surface of the glass needle body 514; the entire nanoliter pump body 5 is based on the tubular shell 508, and the glass needle body 514 and the cable protective cover 501 are connected at both ends for use; the piston is driven to reciprocate by the internal stepping motor 517 to inject liquid and control precision.

[0026] When the entire nanoliter pump body 5 is actually controlled, a transfer PCB board 515 is provided inside the end of the tubular shell 508 close to the cable protective cover 501, a zero point sensor 516 is provided on the side of the transfer PCB board 515, a stepper motor 517 is connected to the side of the zero point sensor 516, and an injection needle mounting rod 518 is connected to the output shaft of the stepper motor 517. Therefore, the digital signal of the control instrument 1 is converted into an analog signal through the transfer PCB board 515 to drive the stepper motor 517 to operate, and the signal is monitored through the zero point sensor 516 to achieve high-precision control and adjustment.

[0027] The structural relationship between the glass needle body 514 and the injection needle body 522 inside the entire nanoliter pump body 5 is as follows: the injection needle body 522 is inserted on the surface of the injection needle mounting rod 518, and the end of the injection needle body 522 is provided with an injection needle sealing ring 519, and the surface of the injection needle sealing ring 519 is provided with an injection needle limiting spacer 520, and the surface of the injection needle limiting spacer 520 is connected to the end of the glass needle body 514, and a glass needle sealing ring 521 is provided at the edge where the glass needle body 514 and the injection needle limiting spacer 520 are connected. When actually installing, unscrew the needle clamping cap 513 of the nanoliter pump, insert the large open end of the oil-filled glass needle body 514 from the tip of the needle clamping cap 513, and then put the glass needle sealing ring 521 on the glass needle body 514 until the glass needle The main body 514 is exposed 2-3mm from the glass needle sealing ring 521. This process requires a little force. Be careful not to break the glass needle main body 514. Then put the glass needle main body 514 on the injection needle main body 522, and then tighten the needle clamp cap 513 until it is tightened. After installation, try to pull the glass needle main body 514 to ensure that the glass needle main body 514 is firmly installed and the order of each component is correct. Normally, the injection needle sealing ring 519 and the injection needle limiting spacer 520 are in the nanoliter pump main body 5. If the injection needle sealing ring 519 and the injection needle limiting spacer 520 are accidentally pushed out, they need to be installed in the nanoliter pump in the correct order. Note that the white injection needle limiting spacer 520 is flat on one side and has a groove on the other side. The glass needle main body 514 needs to be pushed in and installed. Specific embodiment 2:

[0029] Reference Figure 1-5 , other limiting structures of the entire device are as follows: a side mounting block 505 is bolted to the side of the tubular housing 508, a clamping rod 507 is penetrated through the surface of the side mounting block 505, a clamping cap 506 is provided at the end of the clamping rod 507, an indicator light ring 503 is provided at the connecting edge of the rear end cover 504 and the wire tail pressure cover 502, a decorative color ring 510 is provided at the connecting edge of the tubular housing 508 and the protective tube sleeve, the indicator light ring 503 lights up after the nanoliter pump is connected to the control instrument 1, and serves as a reminder after the power is connected, the cable protective sleeve 501, the rear end cover 504, the wire tail pressure cover 502, the tubular housing 508, the protective sleeve 509, the drive housing 511, the needle sleeve 512 and the needle clamping cap 513 are all coaxial rotating body structures, so that the entire nanoliter pump body 5 is a coaxial structure, the driving path is a straight line, the structure is simple, and it is easy to assemble. Specific embodiment three:

[0031] Reference Figure 1-5 When actually in use, the control instrument 1 is provided with at least a circuit board, a chip and other control structures controlled by a multi-adapter PCB board 515, which are used to connect and control the nanoliter pump body 5. The specific structure is set in combination with the existing control instrument 1 for the nanoliter pump.

[0032] In summary:

[0033] After the control instrument 1 is connected to the nanoliter pump body 5, various devices can be connected through the device interface 4 on the surface for testing, realizing one-to-many structure testing, and the piston movement of the stepper motor 517 inside the nanoliter pump body 5 can realize the controlled flow of the liquid. By controlling the movement lead of the piston, the injection accuracy of 0.01 nanoliter can be achieved, realizing high-precision, high-repeatability and high-reliability liquid conduction operation of the nanoliter pump body 5, and accurate liquid delivery can be achieved in different occasions.

[0034] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0035] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A nanoliter pump, comprising a control instrument (1) and a nanoliter pump body (5), characterized in that: The nanoliter pump body (5) comprises a tubular shell (508) and a glass needle body (514); a rear end cover (504) is provided at one end of the tubular shell (508); a wire tail pressure cover (502) is connected to the end of the rear end cover (504); a cable protection sleeve (501) is passed through the end of the wire tail pressure cover (502); a protective sleeve (509) is provided at the other end of the tubular shell (508); a drive shell (511) is provided at the end of the protective sleeve (509); a needle sleeve (512) is provided at the end of the drive shell (511); a needle clamping cap (513) is provided at the end of the needle sleeve (512); a needle clamping cap (513) passes through the surface of the glass needle body (514); and a nanoliter pump interface (3) is provided on the side of the control instrument (1).

2. A nanoliter pump according to claim 1, characterized in that: An adapter PCB board (515) is provided inside one end of the tubular housing (508) close to the cable protective cover (501), a zero point sensor (516) is provided on the side of the adapter PCB board (515), a stepper motor (517) is connected to the side of the zero point sensor (516), and an injection needle mounting rod (518) is connected to the output shaft of the stepper motor (517).

3. A nanoliter pump according to claim 2, characterized in that: An injection needle body (522) is inserted into the surface of the injection needle mounting rod (518), an injection needle sealing ring (519) is provided at the end of the injection needle body (522), an injection needle limiting spacer (520) is provided on the surface of the injection needle sealing ring (519), the surface of the injection needle limiting spacer (520) is connected to the end of the glass needle body (514), and a glass needle sealing ring (521) is provided at the edge where the glass needle body (514) and the surface of the injection needle limiting spacer (520) are connected.

4. A nanoliter pump according to claim 1, characterized in that: A side mounting block (505) is bolted to the side of the tubular housing (508), a clamping rod (507) is passed through the surface of the side mounting block (505), and a clamping cap (506) is provided at the end of the clamping rod (507).

5. A nanoliter pump according to claim 1, characterized in that: An indicator light ring (503) is provided at the edge where the rear end cover (504) and the wire end pressure cover (502) are connected, and a decorative color ring (510) is provided at the edge where the tubular housing (508) and the protective tube sleeve are connected.

6. A nanoliter pump according to claim 1, characterized in that: The control instrument (1) is provided with a display panel (2) on the front, and a plurality of device interfaces (4) are provided in a linear array on the back of the control instrument (1). The nanoliter pump interface (3) is located on one side of the back of the control instrument (1).

7. A nanoliter pump according to claim 1, characterized in that: The cable protective cover (501), the rear end cover (504), the wire tail pressure cover (502), the tubular housing (508), the protective sleeve (509), the drive housing (511), the needle sleeve (512) and the needle clamping cap (513) are all coaxial rotating body structures.

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