CN217120316U

CN217120316U - Spiral piston type pipette

Info

Publication number: CN217120316U
Application number: CN202221113184.9U
Authority: CN
Inventors: 姜程馨
Original assignee: Hangzhou Maien Technology Co ltd
Current assignee: Hangzhou Maien Technology Co ltd
Priority date: 2022-05-10
Filing date: 2022-05-10
Publication date: 2022-08-05
Anticipated expiration: 2032-05-10

Abstract

The application provides a spiral piston formula pipette belongs to pipette technical field. The spiral piston type pipette comprises a pipette component and a pipette main body, wherein the pipette component comprises a piston cylinder, a piston block, a thread knob and a threaded rod, the pipette main body comprises a first screw cap, a liquid storage ball, a liquid measuring tube and a liquid suction needle head, the liquid storage ball and the liquid measuring tube are detachably connected to the bottom end of the piston cylinder through the threaded fit of the first nut and the quick-release connector, so that the liquid suction tube main body is detachably connected with the liquid suction device assembly, the liquid suction needle head is detachably screwed to the bottom end of the liquid measuring tube, the liquid suction tube main body is conveniently detached, cleaned or replaced, and the use by people is facilitated, when the threaded rod is rotated by the rotary handle to spirally lift or move downwards in the threaded knob, the piston block can be driven to slowly move up and down, thereby can be accurate carry out imbibition and tapping, the dynamics of push-and-pull piston piece is mastered more easily, is favorable to promoting imbibition and tapping ground precision.

Description

Spiral piston type pipette

Technical Field

The application relates to the pipette field, particularly, relates to a spiral piston formula pipette.

Background

A pipette is a device for quantitatively transferring a liquid, and when performing research in an analytical test, a small amount or a trace amount of liquid is generally transferred by using the pipette. Piston pipettes are most commonly used today, in which the suction and discharge of the liquid is accomplished by pushing and pulling a piston.

Current piston pipette is because operating personnel push-and-pull piston's dynamics is difficult to accurate control when using, causes to absorb and discharge liquid ground precision not high, and the most as an organic whole structure of pipette, can't be to carrying out the split clearance or change at the in-process that uses, and inconvenient people use.

SUMMERY OF THE UTILITY MODEL

In order to remedy the above drawback, the present application provides a pipette of the helical piston type, aimed at improving the problems set forth in the background art mentioned above.

The embodiment of the application provides a spiral piston type pipette, including pipettor subassembly and pipette main part.

The pipettor assembly comprises a piston cylinder, a piston block, a threaded knob and a threaded rod, wherein the piston block is slidably inserted into the piston cylinder, the threaded knob is in threaded sleeve connection with the top end of the piston cylinder, the threaded rod penetrates through the threaded knob and is in threaded connection with the threaded knob, the bottom end of the threaded rod is rotatably connected to the top of the piston block, the bottom end of the piston cylinder is communicated with a quick-release joint, and the top end of the threaded rod is fixedly connected with a rotating handle.

The pipette main part includes first nut, stock solution ball, buret and imbibition syringe needle, first nut, stock solution ball reach buret integrated into one piece intercommunication sets up, just first nut screw cup joint in quick detach connects, the imbibition syringe needle spiro union in buret bottom.

In the above-mentioned realization in-process, screw-thread fit through first nut and quick detach joint, connect liquid storage ball and liquid measuring pipe detachably in piston cylinder bottom, it is connected with pipettor subassembly detachably to have realized the pipette main part, so that dismantle clearance or change to the pipette main part, make things convenient for people to use, connect the detachable spiro union of imbibition syringe needle in liquid measuring pipe bottom, so that dismantle the pipette needle and change, rotate the threaded rod through the spiral handle and lift or when moving down in the screw knob internal screw, can drive the piston piece and slowly reciprocate, thereby can be accurate carry out imbibition and tapping, the dynamics of push-and-pull piston piece is mastered more easily, be favorable to promoting imbibition and tapping ground precision.

In a specific embodiment, the outer peripheral wall of the piston block is tightly attached to the inner peripheral wall of the piston cylinder, and the top of the piston block is fixedly provided with a rotating sleeve.

In a specific embodiment, the inner bottom wall of the threaded knob is provided with an embedded groove matched with the rotating sleeve, and the outer peripheral wall of the threaded knob is provided with an anti-skid groove.

In the implementation process, the lower end of the threaded rod can rotate in the rotating sleeve, and when the threaded rod is rotated by the rotary handle to spirally lift or move downwards in the threaded knob, the piston block can be driven to slowly move up and down, so that liquid suction and liquid discharge can be accurately carried out, the force for pushing and pulling the piston block is easy to master, and the liquid suction and liquid discharge accuracy can be favorably improved.

In a specific embodiment, the top of the rotary handle is provided with a pressing groove, and the bottom of the rotary handle is symmetrically provided with two finger grooves.

In the implementation process, the thumb is pressed on the arc pressing groove to prevent slipping, the index finger and the middle finger are clamped into the two finger grooves respectively to prevent fingers from falling off, and the threaded rod can be rapidly rotated by using the rotary handle to complete liquid suction and discharge.

In a specific embodiment, two side walls of the piston cylinder are fixedly provided with nipping handles, and the surfaces of the nipping handles are provided with anti-skid grains.

In the above-mentioned realization process, can hold the piston cylinder through the handle of kneading of setting steadily to it is rotatory to twist the swing handle more laborsaving convenient.

In a specific embodiment, a first thread is arranged on the outer wall of one end, away from the liquid storage ball, of the liquid measuring pipe, and a first scale mark is arranged on the outer wall of the liquid measuring pipe.

In a specific embodiment, a second screw cap is sleeved at one end of the liquid suction needle, and the internal thread of the second screw cap is matched with the first thread.

In the above-mentioned realization process, the imbibition syringe needle passes through the cooperation of second nut and first screw thread and detachable spiro union in buret bottom to dismantle the imbibition syringe needle and change.

In a specific embodiment, be provided with the second scale mark on the imbibition syringe needle periphery wall, the imbibition syringe needle is close to be provided with the second screw thread on the periphery wall of second nut.

In the implementation process, the liquid entering the liquid suction needle head and the liquid measuring tube is measured by utilizing the first scale mark and the second scale mark, so that the liquid transfer is more accurate.

In a specific embodiment, the outer sleeve of the liquid suction needle is provided with a needle sleeve, and the open end of the needle sleeve is provided with a third nut matched with the second thread.

In the implementation process, the needle sleeve is sleeved outside the liquid suction needle head through the matching of the third nut and the second thread, so that secondary pollution to the outside of the liquid suction needle head is effectively avoided.

In a specific embodiment, a pressure regulating valve is communicated between the liquid storage ball and the first nut.

In the implementation process, the pressure of the upper end of the liquid storage ball can be controlled through the pressure regulating valve, so that the pressure inside the liquid suction pipe main body is regulated, and the liquid suction speed and the liquid discharge speed are regulated.

Drawings

In order to more clearly explain the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort.

FIG. 1 is a schematic diagram of a pipette configuration of the spiral piston type provided by an embodiment of the present application;

fig. 2 is a schematic structural view of a pipette assembly provided in an embodiment of the present application;

FIG. 3 is a schematic view of a threaded knob according to an embodiment of the present disclosure;

fig. 4 is a schematic structural view of a pipette body provided in an embodiment of the present application;

fig. 5 is an exploded view of a pipette body provided in an embodiment of the present application.

In the figure: 10-a pipette assembly; 110-a piston cylinder; 111-quick release joint; 120-a piston block; 121-rotating sleeve; 130-a threaded knob; 131-an embedded groove; 132-anti-slip groove; 140-a threaded rod; 150-rotating handle; 160-knob handle; 20-pipette body; 210-a first nut; 220-liquid storage ball; 230-a liquid measuring tube; 231-first thread; 232-first tick mark; 240-a liquid suction needle; 241-a second screw cap; 242-second tick mark; 243-second thread; 250-needle sleeve; 251-a third nut; 260-pressure regulating valve.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.

Referring to fig. 1-5, the present application provides a spiral piston pipette including a pipette assembly 10 and a pipette body 20.

Referring to fig. 2 and 3, the pipette assembly 10 includes a piston cylinder 110, a piston block 120, a screw knob 130 and a screw rod 140, the piston block 120 is slidably inserted into the piston cylinder 110, a quick-release joint 111 is disposed at the bottom end of the piston cylinder 110, the screw knob 130 is screwed to the top end of the piston cylinder 110, the screw rod 140 is screwed to the screw knob 130, the bottom end of the screw rod 140 is rotatably connected to the top of the piston block 120, a rotating handle 150 is fixedly connected to the top end of the screw rod 140, and is integrally formed, the screw rod 140 can be rapidly rotated by the rotating handle 150 to complete liquid suction and discharge, specifically, the outer peripheral wall of the piston block 120 is tightly attached to the inner peripheral wall of the piston cylinder 110 to prevent air leakage or liquid leakage, a rotating sleeve 121 is fixedly disposed at the top of the piston block 120, an inner bottom wall of the screw knob 130 is provided with an embedded groove 131 adapted to the rotating sleeve 121 for accommodating the rotating sleeve 121, the outer peripheral wall of the screw knob 130 is provided with an anti-slip groove 132, because the lower end of the threaded rod 140 can rotate in the rotating sleeve 121, when the threaded rod 140 is rotated by the rotating handle 150 to spirally lift or move downwards in the threaded knob 130, the piston block 120 can be driven to slowly move upwards and downwards, so that liquid suction and liquid discharge can be accurately performed, the force for pushing and pulling the piston block 120 is easy to master, and the liquid suction and liquid discharge accuracy can be improved.

In this embodiment, the top of the rotating handle 150 is provided with a pressing groove, the thumb is pressed on the arc pressing groove to prevent slipping, the bottom of the rotating handle 150 is symmetrically provided with two finger grooves, and the index finger and the middle finger are respectively clamped into the two finger grooves to prevent the fingers from falling off.

In other embodiments, the two side walls of the piston cylinder 110 are fixedly provided with the knob 160, the knob 160 is integrally formed, the surface of the knob 160 is provided with anti-slip patterns, and the piston cylinder 110 can be stably held and pinched through the knob 160, so that the knob 150 can be conveniently and rapidly screwed in a labor-saving manner.

Referring to fig. 4 and 5, the pipette main body 20 includes a first nut 210, a liquid storage ball 220, a liquid measuring tube 230 and a liquid sucking needle 240, the first nut 210, the liquid storage ball 220 and the liquid measuring tube 230 are integrally formed and communicated, an outer diameter of the liquid storage ball 220 is greater than an outer diameter of the liquid measuring tube 230, the liquid storage ball 220, the liquid measuring tube 230 and the liquid sucking needle 240 form a liquid transferring container, which is convenient for sucking liquid and releasing liquid, the first nut 210 is screwed on the quick release joint 111, so that the pipette main body 20 and the pipette assembly 10 are detachably connected, the pipette main body 20 is detached, cleaned or replaced, and the liquid sucking needle 240 is screwed on the bottom end of the liquid measuring tube 230.

When specifically setting up, be provided with first screw thread 231 on the one end outer wall that liquid storage ball 220 was kept away from to buret 230, imbibition syringe needle 240 pot head is equipped with second nut 241, the internal thread and the first screw thread 231 adaptation of second nut 241, imbibition syringe needle 240 is through the cooperation of second nut 241 with first screw thread 231 and detachable spiro union in buret 230 bottom, so that dismantle imbibition syringe needle 240 and change, it should be noted that, be provided with first scale mark 232 on the buret 230 periphery wall, be provided with second scale mark 242 on the imbibition syringe needle 240 periphery wall, utilize first scale mark 232 and second scale mark 242 to measure the liquid that gets into imbibition syringe needle 240 and buret 230, make and move liquid more accurate.

In some specific embodiments, a second thread 243 is arranged on the outer peripheral wall of the liquid suction needle 240 close to the second nut 241, a needle sleeve 250 is sleeved outside the liquid suction needle 240, a third nut 251 matched with the second thread 243 is arranged at the opening end of the needle sleeve 250, and the needle sleeve 250 is sleeved outside the liquid suction needle 240 through the cooperation of the third nut 251 and the second thread 243, so that secondary pollution to the outside of the liquid suction needle 240 is effectively avoided.

In other embodiments, a pressure regulating valve 260 is further disposed between the liquid storage ball 220 and the first nut 210, and the pressure at the upper end of the liquid storage ball 220 can be controlled by the pressure regulating valve 260, so as to regulate the pressure inside the pipette body 20, and thus regulate the speed of liquid suction and discharge.

The working principle of the spiral piston type pipette is as follows: when the pipette is used, the liquid storage ball 220 and the liquid measuring tube 230 are detachably connected to the bottom end of the piston cylinder 110 through the threaded matching of the first screw cap 210 and the quick-release connector 111, so that the pipette main body 20 and the pipette component 10 are detachably connected, the pipette main body 20 is conveniently detached, cleaned or replaced, the pipette needle 240 is detachably screwed to the bottom end of the liquid measuring tube 230 through the matching of the second screw cap 241 and the first thread 231, so that the pipette needle 240 is conveniently detached and replaced, people can use the pipette needle conveniently, the liquid entering the pipette needle 240 and the liquid measuring tube 230 is measured by using the first scale line 232 and the second scale line 242, so that the pipette is more accurate, the needle sleeve 250 is sleeved outside the pipette needle 240 through the matching of the third screw cap 251 and the second thread 243, secondary pollution to the outside of the pipette needle 240 is effectively avoided, when the screw rod 140 is rotated by the screw handle 150 to spirally lift up or move down in the screw knob 130, can drive piston block 120 and reciprocate slowly to can be accurate carry out imbibition and tapping, the dynamics of push-and-pull piston block 120 is mastered relatively easily, is favorable to promoting imbibition and tapping ground precision.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A spiral piston type pipette is characterized by comprising

The pipette component (10) comprises a piston cylinder (110), a piston block (120), a threaded knob (130) and a threaded rod (140), wherein the piston block (120) is slidably inserted into the piston cylinder (110), the threaded knob (130) is in threaded sleeve connection with the top end of the piston cylinder (110), the threaded rod (140) is in threaded connection with the threaded knob (130) in a penetrating manner, the bottom end of the threaded rod (140) is rotatably connected to the top of the piston block (120), the bottom end of the piston cylinder (110) is communicated with a quick-release joint (111), and the top end of the threaded rod (140) is fixedly connected with a rotating handle (150);

the liquid suction pipe comprises a liquid suction pipe body (20), wherein the liquid suction pipe body (20) comprises a first screw cap (210), a liquid storage ball (220), a liquid measuring pipe (230) and a liquid suction needle head (240), the first screw cap (210), the liquid storage ball (220) and the liquid measuring pipe (230) are integrally formed and communicated, the first screw cap (210) is in threaded sleeve joint with the quick release joint (111), and the liquid suction needle head (240) is in threaded joint with the bottom end of the liquid measuring pipe (230).

2. A spiral piston type pipette as set forth in claim 1, wherein the outer peripheral wall of the piston block (120) is closely fitted to the inner peripheral wall of the piston cylinder (110), and a rotating sleeve (121) is fixed to the top of the piston block (120).

3. A spiral piston type pipette as set forth in claim 2, wherein the inner bottom wall of the screw knob (130) is formed with an inner insertion groove (131) adapted to the rotating sleeve (121), and the outer peripheral wall of the screw knob (130) is formed with an anti-slip groove (132).

4. The spiral piston type pipette as recited in claim 1, wherein the top of the rotary handle (150) is provided with a pressing groove, and the bottom of the rotary handle (150) is symmetrically provided with two finger grooves.

5. The spiral piston type pipette as claimed in claim 1, wherein handles (160) are fixedly arranged on two side walls of the piston cylinder (110), and the surface of each handle (160) is provided with anti-skid grains.

6. A spiral piston pipette as set forth in claim 1, characterized in that the outer wall of the end of the liquid measuring tube (230) remote from the liquid storage ball (220) is provided with a first thread (231), and the outer peripheral wall of the liquid measuring tube (230) is provided with a first scale mark (232).

7. A spiral piston pipette as set forth in claim 6, characterized in that the pipetting needle (240) is fitted with a second nut (241) at one end, the internal thread of the second nut (241) fitting with the first thread (231).

8. A spiral piston pipette as set forth in claim 7, wherein the outer peripheral wall of the pipette tip (240) is provided with second graduation marks (242), and the outer peripheral wall of the pipette tip (240) adjacent to the second nut (241) is provided with second screw threads (243).

9. A spiral piston pipette as set forth in claim 8, characterized in that the aspirating needle (240) is externally sheathed with a needle sheath (250), the open end of the needle sheath (250) being provided with a third nut (251) adapted to the second thread (243).

10. A spiral piston pipette as set forth in claim 1, characterized in that a pressure regulating valve (260) is also provided in communication between the reservoir ball (220) and the first nut (210).