阅读说明：本技术 一种移液器 (Liquid transfer device ) 是由 孙志文 崔佳琳 于 2021-01-26 设计创作，主要内容包括：本发明实施例公开了一种移液器,包括：移液器主体；吸液管,吸液管第一端与移液器主体连接,吸液管第二端与取液尖连接；取液组件,设置在移液器主体与吸液管之间,取液组件包括：推拉杆,推拉杆穿过吸液管的第一端管口,在吸液管的腔体内往复移动；密封装置,密封装置套设在推拉杆上,密封吸液管第一端管口；其中,密封装置与推拉杆贴合面之间设置有润滑油,在推拉杆与密封装置之间形成油封；通过改变推拉杆伸进吸液管腔体内的体积,调节吸液管的第二端管口处的吸力大小。本发明的技术方案通过改进移液器中取液组件和吸液管的密封形式,在现有技术的基础上,强化了密封效果,从而使得密封装置对吸液管的密封效果更稳定。(The embodiment of the invention discloses a liquid transfer device, which comprises: a pipette body; the first end of the pipette is connected with the pipette main body, and the second end of the pipette is connected with the liquid taking tip; get the liquid subassembly, set up between pipettor main part and pipette, get the liquid subassembly and include: the push-pull rod passes through the first end pipe orifice of the pipette and reciprocates in the cavity of the pipette; the sealing device is sleeved on the push-pull rod and seals the pipe orifice at the first end of the pipette; lubricating oil is arranged between the sealing device and the joint surface of the push-pull rod, and an oil seal is formed between the push-pull rod and the sealing device; the suction force at the second end orifice of the pipette is adjusted by changing the volume of the push-pull rod extending into the pipette cavity. According to the technical scheme, the sealing effect is enhanced on the basis of the prior art by improving the sealing forms of the liquid taking assembly and the liquid taking pipe of the liquid taking device, so that the sealing effect of the sealing device on the liquid taking pipe is more stable.)

1. A pipette (100) characterized by comprising:

a pipette body (10);

a pipette (20), wherein the first end of the pipette (20) is connected with the pipette main body (10), and the second end of the pipette (20) is connected with a liquid taking tip (30);

a liquid taking assembly (40) disposed between the pipette body (10) and the pipette (20), comprising: a push-pull rod (41), wherein the push-pull rod (41) passes through the first end pipe orifice (21) of the pipette (20) and reciprocates in the cavity of the pipette (20); the sealing device (42) is sleeved on the push-pull rod (41) and seals the first end pipe orifice (21) of the pipette (20);

lubricating oil is arranged between the abutting surfaces of the sealing device (42) and the push-pull rod (41), and an oil seal is formed between the push-pull rod (41) and the sealing device (42);

and adjusting the suction force at the second end pipe orifice (22) of the pipette (20) by changing the volume of the push-pull rod (41) extending into the cavity of the pipette (20).

2. The pipette according to claim 1, wherein the sealing device (42) comprises:

the first sealing ring (421) is sleeved on the push-pull rod (41), and a first sealing surface is formed at the joint of the first sealing ring (421) and the push-pull rod (41);

the second sealing ring (422) is sleeved on the outer side of the first sealing ring (421), and a second sealing surface is formed at the joint of the second sealing ring (422) and the peripheral side of the first end pipe orifice (21) of the pipette (20);

the first sealing ring (421) and the second sealing ring (422) are in interference fit; and a third sealing surface is formed between the second sealing ring (422) and the outer side of the first sealing ring (421).

3. The pipette according to claim 1 or 2, characterized in that,

the liquid taking assembly further comprises a pressure plate (43), the pressure plate (43) is sleeved on the push-pull rod (41), and the sealing device (42) is installed in a groove below the pressure plate (43);

an elastic member (44) is provided above the pressure plate (43), and the elastic member (44) is arranged to apply a pressure to the pressure plate (43) in the direction of the first end orifice (21) of the pipette (20).

4. The pipette according to claim 2,

the second sealing ring (422) is a rubber ring.

5. The pipette according to claim 1,

the lubricating oil is an anti-corrosion material.

6. The pipette according to claim 1,

and a water-blocking and air-permeable membrane is arranged at the second end pipe orifice (22) of the pipette (20).

7. A pipette as defined in claim 1, further comprising:

the tip-removing structure comprises a tip-removing button (51) and a tip remover (52); the tail end of the tip remover (52) is annular and is sleeved on the pipette (20), and the tip removing button (51) drives the tip remover (52) to move along the surface of the pipette (20) and is used for pushing the liquid taking tip (30) to be separated from the second end of the pipette (20).

8. The pipette according to claim 1,

the top end of the pipette main body (10) is provided with a volatilization hole for overflowing volatile gas.

9. A pipette as defined in claim 1, further comprising:

the adjusting device is arranged in the pipette main body (10), connected with the push-pull rod (41) and arranged to adjust the volume of the push-pull rod (41) extending into the cavity of the pipette (20).

10. A pipette as defined in claim 9, further comprising:

and the reading display window (60) is used for displaying the liquid taking amount corresponding to the pressure state of the adjusting device in the pipette (100).

Technical Field

The embodiment of the invention relates to the field of liquid taking containers, in particular to a liquid transfer device.

Background

The liquid transfer device is a liquid medicine transfer device commonly used in experimental operations, and is mainly used for transferring liquid medicine in one reagent bottle to another reagent bottle or a dispensing bottle.

In the prior art, the liquid transfer device is unstable in sealing, and both aqueous solution and organic solution can be sucked into a sealing cavity body, so that the liquid transfer device is damaged.

Disclosure of Invention

Therefore, the embodiment of the invention provides a liquid transfer device, which aims to solve the problems that in the prior art, the liquid transfer device is unstable in sealing, and an aqueous solution and an organic solution are sucked into a sealed cavity reversely, so that the liquid transfer device is damaged.

In order to achieve the above object, an embodiment of the present invention provides the following:

in one aspect of embodiments of the present invention, there is provided a pipette comprising: a pipette body; the first end of the pipette is connected with the pipette main body, and the second end of the pipette is connected with the liquid taking tip; get liquid subassembly, set up between the pipettor main part and the pipettor, include: the push-pull rod penetrates through the first end pipe orifice of the pipette and reciprocates in the cavity of the pipette; the sealing device is sleeved on the push-pull rod and seals the pipe orifice of the first end of the pipette; lubricating oil is arranged between the sealing device and the abutting surface of the push-pull rod, and an oil seal is formed between the push-pull rod and the sealing device; and adjusting the suction force at the second end orifice of the pipette by changing the volume of the push-pull rod extending into the pipette cavity.

Further, the sealing device includes: the first sealing ring is sleeved on the push-pull rod, and a first sealing surface is formed at the joint of the first sealing ring and the push-pull rod; the second sealing ring is sleeved on the outer side of the first sealing ring, and a second sealing surface is formed at the joint of the second sealing ring and the periphery of the first end pipe orifice of the pipette; the first sealing ring and the second sealing ring are in interference fit; and a third sealing surface is formed between the second sealing ring and the outer side of the first sealing ring.

Furthermore, the liquid taking assembly also comprises a pressing plate, the pressing plate is sleeved on the push-pull rod, and the sealing device is arranged in a groove below the pressing plate; an elastic member is arranged above the pressure plate and is configured to apply pressure to the pressure plate in the direction of the first end orifice of the pipette.

Further, the second sealing ring is a rubber ring.

Further, the lubricating oil is an anti-corrosion material.

Further, a water-blocking air-permeable membrane is arranged at the second end pipe orifice of the pipette.

Further, the pipette further comprises: the tip unloading structure comprises a tip unloading button and a tip unloader; the tip removing device is characterized in that the tail end of the tip removing device is annular and is sleeved on the pipette, and the tip removing button drives the tip removing device to move along the surface of the pipette and is used for pushing the liquid taking tip to be separated from the second end of the pipette.

Further, a volatilization hole is formed in the top end of the pipette main body and used for overflowing volatile gas.

Further, the pipette, further comprising: and the adjusting device is arranged in the pipette body, is connected with the push-pull rod and is used for adjusting the volume of the push-pull rod extending into the pipette cavity.

Further, the pipette further comprises: and the reading display window is used for displaying the liquid taking amount corresponding to the pressure state of the adjusting device in the liquid transferring device.

The embodiment of the invention has the following advantages:

the embodiment of the invention discloses a liquid transfer device, which simplifies the complexity of a liquid taking assembly in the prior art and simultaneously enables the sealing effect of a sealing device on a liquid suction pipe to be more stable by improving the sealing of the liquid taking assembly on the liquid suction pipe and the liquid taking mode of the liquid taking assembly.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.

Fig. 1 is a schematic partial structural view of a pipette provided in an embodiment of the present invention;

fig. 2 is a schematic diagram illustrating an overall structure of a pipette according to an embodiment of the present invention;

fig. 3 is an enlarged partial structure view of a pipette according to an embodiment of the present invention.

In the figure: 100-pipette, 10-pipette body, 20-pipette, 21-first end nozzle, 22-second end nozzle, 30-liquid taking tip, 40-liquid taking component, 41-push-pull rod, 42-sealing device, 421-first sealing ring, 422-second sealing ring, 43-pressing plate, 44-elastic piece, 51-tip removing button, 52-tip removing device and 60-reading display window.

Detailed Description

The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the present specification, the terms "upper", "lower", "left", "right", "middle", and the like are used for clarity of description, and are not intended to limit the scope of the present invention, and changes or modifications in the relative relationship may be made without substantial changes in the technical content.

Examples

Referring to fig. 1, 2 and 3, which are schematic structural views of a pipette 100 provided according to an embodiment of the present invention, the pipette 100 includes: a pipette body 10; a pipette 20, wherein a first end of the pipette 20 is connected with the pipette main body 10, a second end of the pipette 20 is connected with a liquid taking tip 30, and the liquid taking tip 30 is used for storing liquid medicine; a tapping assembly 40.

Wherein, get liquid subassembly 40 and set up between pipettor main part 10 and pipette 20, get liquid subassembly 40 and include: a push-pull rod 41, the push-pull rod 41 passing through the first end orifice 21 of the pipette 20 and reciprocating in the cavity of the pipette 20; and the sealing device 42 is sleeved on the push-pull rod 41, and seals the first end pipe orifice 21 of the pipette 20.

Specifically, lubricating oil is provided between the abutting surfaces of the sealing device 42 and the push-pull rod 41, and an oil seal is formed between the push-pull rod 41 and the sealing device 42. The amount of suction at the second end orifice 22 of the pipette 20 is adjusted by changing the volume of the push-pull rod 41 that extends into the cavity of the pipette 20.

The contact surface of the push-pull rod 41 and the sealing device 42 is sealed through lubricating oil, and the first end pipe orifice 21 of the pipette 20 is sealed through the sealing device 42, so that a sealed cavity is formed in the pipette 20, when the push-pull rod 41 extends into the sealed cavity, air in the cavity overflows from the second end pipe orifice 22 of the pipette 20, after the liquid taking tip 30 extends below the liquid level of liquid medicine, the push-pull rod 41 is moved out of the sealed cavity, due to the fact that the volume in the sealed cavity is reduced, the pressure is reduced, the liquid medicine enters the liquid taking tip from the port of the liquid taking tip 30 under the action of atmospheric pressure, and therefore one-time liquid taking operation is completed. Wherein, after the liquid taking tip 30 finishes the liquid taking, the liquid is stored in the liquid taking tip 30.

Similarly, when releasing the liquid, the volume of the push-pull rod 41 in the sealed cavity needs to be increased to complete one liquid discharge operation.

As shown in fig. 1 and 3, the sealing device 42 includes: the first sealing ring 421 is sleeved on the push-pull rod 41, and a first sealing surface is formed at the joint of the first sealing ring 421 and the push-pull rod 41; the second sealing ring 422 is sleeved outside the first sealing ring 421, and a second sealing surface is formed at the joint of the second sealing ring 422 and the peripheral side of the first end pipe orifice 21 of the pipette 20; wherein, the first sealing ring 421 is in interference fit with the second sealing ring 422; a third sealing surface is formed between the second sealing ring 422 and the outer side of the first sealing ring 421.

Specifically, the first sealing ring 421 applies a pressure to the second sealing ring 422 in the direction toward the push-pull rod 41, so that the second sealing ring 422 and the first sealing ring 421 are in interference fit, and the sealing effect of the formed third sealing surface is better.

As shown in fig. 1 and 3, the liquid taking assembly further comprises a pressing plate 43, the pressing plate 43 is sleeved on the push-pull rod 41, and the sealing device 42 is installed in a groove below the pressing plate 43; above the pressure plate 43, an elastic member 44 is provided, and the elastic member 44 is arranged to apply pressure to the pressure plate 43 in the direction of the first end nozzle 21 of the pipette 20.

Wherein, exert the power towards first end mouth of pipe 21 for clamp plate 43 through predetermineeing elastic component 44 for the clamp plate 43 exerts the power towards first end mouth of pipe 21 for sealing device 42, makes second sealing washer 422 and the laminating of first end mouth of pipe 21 week side inseparabler, and sealed effect is more stable. Alternatively, the elastic member 44 may be a spring member.

As shown in fig. 1 and 3, the second sealing ring 422 is a rubber ring, and the rubber ring has stable chemical and physical properties. In particular, the removal of liquids containing volatile substances is often encountered during use of the pipette 100, and the sealing performance of the sealing device 42 is often compromised when the volatile substances enter the liquid removal assembly 40, which can be avoided by using a chemically and physically stable rubber ring as the second sealing ring 422.

Specifically, the lubricating oil arranged on the push-pull rod is an anti-corrosion material. Since volatile gas generally corrodes oil seals formed on the surfaces of the sealing device 42 and the push-pull rod 41, it is necessary to use a high-molecular anti-corrosive material as the lubricating oil of the present invention.

As shown in fig. 1 and 2, the second end nozzle 22 of the pipette 20 is provided with a water-blocking, air-permeable membrane. Specifically, in the use process of the pipette 100, in general, due to shaking or overturning of the pipette caused by the error operation of the operator, the extracted liquid medicine easily flows into the interior of the pipette 100 from the pipette second port 22 of the pipette, and therefore, a water-blocking air-permeable membrane is provided at the second port 22 for blocking the inflow of the liquid medicine.

Optionally, the water-blocking and breathable film in the embodiment of the invention may be made of polytetrafluoroethylene or microporous ceramic material.

As shown in fig. 2, pipette 100 further includes: a tip-removing structure comprising a tip-removing button 51 and a tip remover 52. The tip removing structure is used for removing the liquid taking tip 30 from the second end of the pipette 20 after one liquid taking operation is finished, so that the phenomenon that an operator contacts the liquid taking tip 30 to cause pollution is avoided.

The tip-removing button 51 drives the tip-removing device 52 to move along the surface of the pipette 20, so as to push the liquid-taking tip 30 to be separated from the second end of the pipette 20.

In the embodiments provided herein, a volatilization orifice is provided at the top end of pipette body 10 for the escape of volatile gases into the interior of pipette 100.

Specifically, pipette 100 further includes an adjusting device disposed in pipette body 10 and connected to push-pull rod 41, where the adjusting device is configured to adjust the volume of push-pull rod 41 extending into the cavity of pipette 20.

As shown in fig. 2, the pipette 100 further includes a reading display window 60, and the reading display window 60 is used for displaying a liquid taking amount value corresponding to the state of the adjustment device in the pipette 100.

Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.