CN218530975U - Push-pull liquid transfer device for sucking viscous liquid - Google Patents
Push-pull liquid transfer device for sucking viscous liquid Download PDFInfo
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- CN218530975U CN218530975U CN202221651259.9U CN202221651259U CN218530975U CN 218530975 U CN218530975 U CN 218530975U CN 202221651259 U CN202221651259 U CN 202221651259U CN 218530975 U CN218530975 U CN 218530975U
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Abstract
The utility model discloses a plug-type pipettor for absorbing sticky liquid, include: the liquid transfer device comprises a liquid transfer device cavity, a liquid storage cavity and a liquid transfer device, wherein an opening liquid containing cavity is formed in the liquid transfer device cavity; the push-pull type piston comprises a piston rod and a piston head, one end of the piston rod extends into the liquid containing cavity, the other end of the piston rod is positioned outside the liquid containing cavity, the piston head is arranged at one end of the piston rod positioned in the liquid containing cavity, and the piston head is arranged in the liquid containing cavity in a reciprocating sliding manner; the closed end of the pipette cavity is provided with a first liquid nozzle and a second liquid nozzle with different inner apertures, the inner aperture of the first liquid nozzle is smaller than that of the second liquid nozzle, the first liquid nozzle is arranged in the center of the closed end, the second liquid nozzle is eccentrically arranged on the closed end, and an openable/closable blocking piece is arranged on the second liquid nozzle; one end of the piston head mounted on the piston rod or the piston head is provided with a displacement section which extends towards the first liquid nozzle for a certain length, and the outline shape of the displacement section is matched with the outline shape of the first liquid nozzle.
Description
Technical Field
The utility model relates to a biology and chemical industry technical field, specificly relate to a plug-type pipettor for absorbing viscous liquid.
Background
The existing common liquid removing devices mainly comprise syringes and press type range-adjustable pipettors. The injector comprises a needle head which is mainly used for injecting medicine, and can be used for transferring non-sticky liquid after the needle head is removed, so that the sticky liquid cannot be accurately sucked, the viscous liquid is more, and the liquid level is lower, and the liquid cannot be sucked; the range-adjustable liquid transfer device is mainly used for quantitatively transferring non-sticky liquid and cannot be used for transferring sticky liquid.
The front end of the existing liquid shifter (similar to an injector) is too short to absorb liquid with lower liquid level, and more liquid which is viscous on the outer surface of the liquid shifter after being absorbed is absorbed; the front volume of the piston of the existing pipettor cannot be completely emptied, so that raw materials are wasted; the adjustable push type pipettor has the phenomenon of wall built-up due to serious lagging suction and discharge of air compression. In addition, if the aperture of the liquid suction nozzle of the existing pipettor is too large, the liquid discharge amount cannot be accurately controlled during liquid discharge, the liquid transfer requirement with higher precision cannot be met, and if the aperture of the liquid suction nozzle of the existing pipettor is too small, the liquid suction nozzle is not easy to suck viscous liquid, and the operation is inconvenient.
Specifically, the viscous liquid is required to be quantitatively absorbed in the existing microorganism experiments and biochemical experiments, and the existing transfer apparatus cannot meet the requirement of quantitatively transferring the viscous liquid and cannot reach the preset concentration content, so that the experimental effect cannot be ensured. According to the technical background of the industry, the method mainly solves the main technical problems in glycerol (normal-temperature viscosity is about 800-1200mPa & s) transfer in a bacteria strain freezing experiment and quantitative transfer of Tween (normal-temperature viscosity is about 350-550mPa & s) in a biochemical experiment:
firstly, in a bacteria strain cryopreservation experiment, high-pressure sterilization treatment needs to be carried out on glycerol, high pressure needs to be carried out by using a high-pressure resistant appliance, and then 700uL of glycerol subjected to high-pressure sterilization treatment and 300uL of bacterial liquid are mixed and need to be carried out in a biological safety cabinet; in the ELISA experiment, washing liquor and substrate solution are prepared, and Tween is added to reach 200uL per liter of solution; two types of pipettors are available in laboratories for removing viscous liquids, one is a syringe, and the other is an adjustable press type pipettor.
When the syringe is used, when the syringe is provided with a needle head, liquid viscosity cannot be absorbed into the syringe cavity, the syringe without the needle head can be only used for absorbing, when the liquid level of the viscosity liquid is lower, the front end of the syringe and the cavity cannot be contacted with the liquid for absorbing, the container can only be inclined for absorbing, the viscous liquid is left on the outer wall of the syringe cavity, the viscous liquid drops on the test bed or drops in the reagent tube in the moving process, the moving volume is inaccurate, when the liquid level is lower, the outer wall of the syringe is smooth, the piston is not easy to pull, and in addition, the front end of the syringe is provided with a section of waste which cannot be completely emptied to cause raw material liquid.
(two) when using adjustable push type pipettor, because this kind of pipettor utilizes the negative pressure of pressing the resilience production to absorb, because the less unable absorption in suction head aperture when absorbing sticky liquid, can absorb sticky liquid but extremely easily produce the bubble in the suction head to a certain extent when using the great suction head in aperture and cause a large amount of liquid to remain in the suction head when beating sticky liquid because the liquid viscosity, can't realize accurate ration and move and get sticky liquid to influence the experimental result.
In view of this, the present invention is especially provided.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a plug-type pipettor for absorbing sticky liquid, concrete technical scheme is as follows:
a push-pull pipette for aspirating viscous liquids, comprising:
the liquid transfer device comprises a liquid transfer device cavity, a liquid storage cavity and a liquid transfer device, wherein an opening liquid containing cavity is formed in the liquid transfer device cavity;
the push-pull type piston comprises a piston rod and a piston head, one end of the piston rod extends into the liquid containing cavity, the other end of the piston rod is positioned outside the liquid containing cavity, the piston head is arranged at one end of the piston rod positioned in the liquid containing cavity, and the piston head is arranged in the liquid containing cavity in a reciprocating sliding manner;
the closed end of the pipette cavity is provided with a first liquid nozzle and a second liquid nozzle with different inner apertures, the inner aperture of the first liquid nozzle is smaller than that of the second liquid nozzle, the first liquid nozzle is arranged in the center of the closed end, the second liquid nozzle is eccentrically arranged on the closed end, and a blocking piece capable of being opened/closed is arranged on the second liquid nozzle;
one end of the piston rod, which is provided with the piston head, or the piston head is provided with a displacement section which extends for a certain length towards the first liquid nozzle, and the outline shape of the displacement section is matched with the outline shape of the first liquid nozzle.
As an optional embodiment of the present invention, the blocking member is an end cap disposed on the closed end of the pipette cavity, and the end cap is detachably mounted on the second nozzle.
As an optional embodiment of the present invention, the plug comprises a first plug detachably mounted on the first nozzle and a second plug detachably mounted on the second nozzle.
As an optional embodiment of the present invention, the blocking member is a one-way valve plate disposed in the second nozzle, and the one-way valve plate is in one-way conduction when sucking liquid.
As the utility model discloses an optional embodiment, first liquid mouth in set up first one-way valve piece, set up the one-way valve piece of second in the second liquid mouth, first one-way valve piece one-way conduction when flowing back, the one-way conduction of second one-way valve piece when the imbibition.
As an optional embodiment of the present invention, the exhausting section is a tapered rod, and the outer diameter of the exhausting section is gradually reduced from the end far away from the first liquid nozzle to the end near the first liquid nozzle.
As an optional embodiment of the present invention, the inner aperture of the first liquid nozzle is gradually reduced along the direction from the closed end of the near pipette cavity to the closed end far away from the pipette cavity, the inner portion of the second liquid nozzle has a cylindrical inner hole, and the minimum inner aperture of the first liquid nozzle is smaller than the inner aperture of the second liquid nozzle.
As an optional embodiment of the present invention, a mounting ring is disposed at one end of the piston rod located inside the liquid containing chamber, and a pushing disc is disposed at one end of the piston rod located outside the liquid containing chamber; the exhaust section is arranged on the mounting ring, the piston head penetrates through the exhaust section and is sleeved on the mounting ring, and the periphery of the piston head is tightly attached to the inner wall of the liquid containing cavity.
As an optional embodiment of the utility model, one side of pipettor cavity's open end sets up first side ear, first side ear has the binding face that is used for butt operating personnel forefinger, the opposite side of pipettor cavity's open end set up second side ear, second side ear has the recess that is used for adaptation operating personnel thumb.
As an optional embodiment of the present invention, the first liquid nozzle and the second liquid nozzle are respectively sleeved with a sheath for protecting before the use of the pipette.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides a push-pull type pipettor for absorbing viscous liquid, the design of a push-pull type piston can effectively solve the problems that the compressed air type pipettor generates serious hysteresis when absorbing viscous liquid and the wall hanging can not be completely blown out, and accurate quantification can not be realized; the arrangement of the exhausting section with the outline shape matched with the outline shape of the first liquid nozzle can effectively exhaust viscous liquid, and effectively avoid the waste of raw materials; the blind end of pipettor cavity has first liquid mouth and the second liquid mouth that the interior aperture is unequal, like this, can inhale from the great second liquid mouth in aperture when absorbing viscous liquid, has improved viscous liquid's suction velocity, discharges from the less first liquid mouth in aperture, changes the ration of controlling viscous liquid and discharges.
Meanwhile, the second liquid nozzle of the embodiment is provided with a blocking piece which can be opened/closed, so that the second liquid nozzle is opened when needed and is closed when not needed.
Description of the drawings:
fig. 1 is a schematic structural view of a push-pull type pipettor for sucking viscous liquid according to the present invention;
fig. 2 is a schematic structural view of an embodiment of the push-pull pipette for sucking viscous liquid according to the present invention;
fig. 3 is a schematic structural view of another embodiment of the push-pull liquid transfer device for sucking viscous liquid.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings. It is to be understood that the embodiments described are some, not all embodiments of the invention.
Thus, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the invention as claimed, but is merely representative of some embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, in the present invention, the embodiments and the features and technical solutions in the embodiments may be combined with each other without conflict.
It should be noted that: like reference numbers and letters indicate like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and resolved in subsequent figures
In the description of the present invention, it should be noted that the terms "upper" and "lower" indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship that the utility model is usually placed when using, or the orientation or position relationship that the skilled person usually understands, and such terms are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element that is referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be interpreted as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
Referring to fig. 1 to 3, the present embodiment provides a push-pull pipette for sucking viscous liquid, including:
a pipette cavity 100 having an open liquid containing chamber therein;
the push-pull piston 200 comprises a piston rod 201 and a piston head 202, one end of the piston rod 201 extends into the liquid containing cavity, the other end of the piston rod 201 is positioned outside the liquid containing cavity, the piston head 202 is arranged at one end of the piston rod 201 positioned in the liquid containing cavity, and the piston head 202 can be arranged in the liquid containing cavity in a reciprocating sliding manner;
the closed end of the pipette cavity 100 is provided with a first liquid nozzle 103 and a second liquid nozzle 104 with different inner apertures, the inner aperture of the first liquid nozzle 103 is smaller than that of the second liquid nozzle 104, the first liquid nozzle 103 is arranged in the center of the closed end, the second liquid nozzle 104 is eccentrically arranged on the closed end, and the second liquid nozzle 104 is provided with a plugging piece capable of being opened/closed;
one end of the piston rod 201, which is mounted on the piston head 202, or the piston head 202 is provided with an exhausting section 203 which extends for a certain length towards the direction of the first liquid nozzle 103, and the outline shape of the exhausting section 203 is matched with the outline shape of the first liquid nozzle 103.
The embodiment provides a push-pull type pipettor for sucking viscous liquid, and the design of a push-pull type piston can effectively solve the problems that the compressed air type pipettor generates serious hysteresis when sucking viscous liquid and a wall can not be completely blown out and accurate quantification can not be realized; the arrangement of the exhausting section 203 with the outline shape matched with the outline shape of the first liquid nozzle 103 can effectively exhaust viscous liquid, and effectively avoid the waste of raw materials; the blind end of pipettor cavity 100 has first liquid mouth 103 and second liquid mouth 104 that the inner aperture is unequal, like this, can inhale from the great second liquid mouth 104 in aperture when sucking viscous liquid, has improved viscous liquid's suction velocity, discharges from the less first liquid mouth 103 in aperture, and it discharges to change the ration of controlling viscous liquid.
Meanwhile, the second nozzle 104 of the present embodiment is provided with an openable/closable blocking member, so that the second nozzle 104 is opened when needed and closed when not needed. In particular, the closure can be opened when sucking in viscous liquids and closed when discharging viscous liquids.
Referring to fig. 2, as an alternative embodiment of this embodiment, the blocking member is a plug 300 disposed at the closed end of the pipette cavity, and the plug 300 is detachably mounted on the second liquid nozzle 1034. Specifically, plug 300 of the present embodiment may employ a plug cap structure that directly covers second nozzle 104. Further, the plug 300 can be screwed with the second nozzle 104 to increase the sealing tightness.
Specifically, the plug 300 includes a first plug 301 detachably mounted on the first nozzle 103 and a second plug 302 detachably mounted on the second nozzle 104.
The first plug 301 of the first nozzle 103 of this embodiment can plug the first nozzle 103 when the rewashing fluid is selected as needed, and only suck from the second nozzle 104, thereby avoiding the decrease of the overall liquid suction speed due to the low suction speed of the first nozzle 103.
Referring to fig. 3, as an alternative embodiment of this embodiment, the blocking member is a one-way valve 400 disposed in the second nozzle 104, and the one-way valve 400 is in one-way conduction when sucking liquid.
Specifically, a first check valve plate 401 is arranged in the first liquid nozzle 103, a second check valve plate 402 is arranged in the second liquid nozzle 104, the first check valve plate 401 is in one-way conduction during liquid discharging, and the second check valve plate 402 is in one-way conduction during liquid sucking.
The plugging piece of this embodiment adopts the check valve piece, need not personnel's operation, according to the one-way conduction characteristics of check valve piece self, can realize during the imbibition by second liquid mouth 104 inhales, during the flowing back by first liquid mouth 103 discharge.
As an optional implementation manner of this embodiment, in this embodiment, the exhausting section 203 is a tapered rod, and an outer diameter of the exhausting section 203 gradually decreases from one end far away from the first liquid nozzle to one end close to the first liquid nozzle.
In this embodiment, the inner aperture of the first nozzle 103 gradually decreases from the closed end close to the pipette cavity 100 to the closed end far from the pipette cavity 100, a cylindrical inner hole is formed inside the second nozzle 104, and the minimum inner aperture of the first nozzle 103 is smaller than the inner aperture of the second nozzle 104.
The embodiment provides a plug-type pipettor for drawing sticky liquid has comparatively slender conical suction nozzle, can effectively absorb the lower sticky liquid of liquid level, simultaneously because the viscous of sticky liquid can effectively be avoided in the design of slender toper, easy landing has the section 203 of arranging to the greatest extent corresponding with slender toper suction nozzle simultaneously, can effectively empty sticky liquid, has effectively avoided the waste of raw and other materials.
Specifically, the diameter of the first liquid nozzle 103 is 1.5-2mm, so that viscous liquid can be discharged conveniently. In addition, the outer side of the liquid transferring device cavity 100 is printed with volume scales, so that a user can accurately measure the viscous liquid
Specifically, in this embodiment, a mounting ring is disposed at one end of the piston rod 201 located inside the liquid containing chamber, and a pushing disc is disposed at one end of the piston rod 201 located outside the liquid containing chamber; the exhaust section 203 is arranged on the mounting ring, the piston head 202 penetrates through the exhaust section 203 and is sleeved on the mounting ring, and the periphery of the piston head 202 is tightly attached to the inner wall of the liquid containing cavity.
As an optional implementation manner of this embodiment, in order to facilitate the pipetting operation of an operator, in this embodiment, a first side ear 101 is disposed on one side of the open end of the pipette cavity 100, the first side ear 101 has an abutting surface for abutting against an index finger of the operator, and a second side ear 102 is disposed on the other side of the open end of the pipette cavity 100, and the second side ear 102 has a groove for fitting with a thumb of the operator.
As an optional implementation manner of this embodiment, the first liquid nozzle 103 and the second liquid nozzle 104 are respectively sleeved with a sheath for shielding before the pipette is used.
The piston rod 201 of this embodiment is in the shape of a plastic 4-piece vane.
The above embodiments are only used to illustrate the present invention and not to limit the technical solutions described in the present invention, and although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and therefore, any modification or equivalent replacement may be made to the present invention; all the technical solutions and modifications without departing from the spirit and scope of the present invention are covered by the claims of the present invention.
Claims (10)
1. A push-pull type pipettor for sucking viscous liquid is characterized by comprising:
the liquid transfer device comprises a liquid transfer device cavity, a liquid storage cavity and a liquid transfer device, wherein an opening liquid containing cavity is formed in the liquid transfer device cavity;
the push-pull type piston comprises a piston rod and a piston head, one end of the piston rod extends into the liquid containing cavity, the other end of the piston rod is positioned outside the liquid containing cavity, the piston head is arranged at one end of the piston rod positioned in the liquid containing cavity, and the piston head is arranged in the liquid containing cavity in a reciprocating sliding manner;
the closed end of the pipette cavity is provided with a first liquid nozzle and a second liquid nozzle with different inner apertures, the inner aperture of the first liquid nozzle is smaller than that of the second liquid nozzle, the first liquid nozzle is arranged in the center of the closed end, the second liquid nozzle is eccentrically arranged on the closed end, and a blocking piece capable of being opened/closed is arranged on the second liquid nozzle;
one end of the piston rod, which is provided with the piston head, or the piston head is provided with a discharge section which extends for a certain length towards the direction of the first liquid nozzle, and the outline shape of the discharge section is matched with the outline shape of the first liquid nozzle.
2. A push-pull pipette for aspirating viscous liquids as described in claim 1, wherein said blocking member is a plug disposed at the closed end of said pipette cavity, said plug being removably mounted to said second nozzle.
3. A push-pull pipette for aspirating viscous liquids as defined in claim 2, wherein said stopper comprises a first stopper detachably mounted on said first nozzle and a second stopper detachably mounted on said second nozzle.
4. A push-pull pipette for aspirating viscous liquids as claimed in claim 1, wherein the blocking member is a one-way valve plate disposed in the second nozzle, and the one-way valve plate is one-way communicated during aspirating.
5. A push-pull pipette for sucking viscous liquid according to claim 4, wherein a first check valve plate is arranged in the first liquid nozzle, a second check valve plate is arranged in the second liquid nozzle, the first check valve plate is in one-way conduction during liquid discharging, and the second check valve plate is in one-way conduction during liquid sucking.
6. A push-pull pipette for aspirating viscous liquids as defined in claim 1, wherein the exhaustion section is a tapered rod, and the outer diameter of the exhaustion section gradually decreases from the end far away from the first nozzle to the end near the first nozzle.
7. A push-pull pipette for aspirating viscous liquids according to claim 6, wherein the inner diameter of the first nozzle gradually decreases from the position near the closed end of the pipette cavity to the position far away from the closed end of the pipette cavity, the second nozzle has a cylindrical inner hole therein, and the smallest inner diameter of the first nozzle is smaller than the inner diameter of the second nozzle.
8. A push-pull pipette for sucking viscous liquid according to claim 6, wherein a mounting ring is arranged at one end of the piston rod positioned in the liquid containing chamber, and a pushing disk is arranged at one end of the piston rod positioned outside the liquid containing chamber; the exhaust section is arranged on the mounting ring, the piston head penetrates through the exhaust section and is sleeved on the mounting ring, and the periphery of the piston head is tightly attached to the inner wall of the liquid containing cavity.
9. A push-pull pipette for drawing viscous liquid according to claim 1, wherein one side of the open end of the pipette cavity is provided with a first side ear, the first side ear has a bonding surface for abutting against the index finger of an operator, the other side of the open end of the pipette cavity is provided with a second side ear, and the second side ear has a groove for fitting the thumb of the operator.
10. A push-pull pipette for aspirating viscous liquids as described in claim 1, wherein said first nozzle and said second nozzle are respectively sleeved with a sheath for shielding before use of said pipette.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221651259.9U CN218530975U (en) | 2022-06-28 | 2022-06-28 | Push-pull liquid transfer device for sucking viscous liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221651259.9U CN218530975U (en) | 2022-06-28 | 2022-06-28 | Push-pull liquid transfer device for sucking viscous liquid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218530975U true CN218530975U (en) | 2023-02-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221651259.9U Active CN218530975U (en) | 2022-06-28 | 2022-06-28 | Push-pull liquid transfer device for sucking viscous liquid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218530975U (en) |
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2022
- 2022-06-28 CN CN202221651259.9U patent/CN218530975U/en active Active
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