CN215917449U

CN215917449U - Liquid transfer gun head for closed system sample adding

Info

Publication number: CN215917449U
Application number: CN202122213243.1U
Authority: CN
Inventors: 余满江; 余建明; 吴跃勤; 柳文洁
Original assignee: Hangzhou A Gen Biotechnology Ltd
Current assignee: Hangzhou A Gen Biotechnology Ltd
Priority date: 2021-09-13
Filing date: 2021-09-13
Publication date: 2022-03-01
Anticipated expiration: 2031-09-13

Abstract

The utility model discloses a pipette tip for sample application of a closed system, which comprises a fixed tube, wherein the upper part of the inner cavity of the fixed tube is connected with an expansion tube through a thread, the upper part of the inner cavity of the fixed tube is fixedly connected with a first limiting ring below the thread, the lower part of the inner cavity of the fixed tube is connected with a connecting tube through a sliding chute in a sliding manner, and the lower part of the inner cavity of the fixed tube is fixedly connected with a second limiting ring above the sliding chute. This a liquid-transfering gun head for airtight system application of sample has solved and has connected insecure and the unchangeable problem of current liquid-transfering gun head volume between current liquid-transfering gun head and the syringe needle.

Description

Liquid transfer gun head for closed system sample adding

Technical Field

The utility model relates to the technical field of chemical experimental equipment, in particular to a liquid-transfering gun head for sample application of a closed system.

Background

As is known, in the experimental study of chemical reactions, a water-free and oxygen-free environment is often required to be achieved, and in the prior art, a reaction system is vacuumized and then protected by inert gas, and then corresponding reaction materials are added into the water-free and oxygen-free closed system. And prior art often is in the liquid-transfering gun head with the syringe needle grafting, then in inserting airtight system with the syringe needle again, carries out the application of sample to it, but this kind utilizes the interference fit between syringe needle and the liquid-transfering gun head often not firm, and when using, the syringe needle very easily drops, and this influence experiment process that can be serious. Meanwhile, the volume of the conventional pipette tip is fixed, and the pipette tip is required to be replaced after the liquid transfer amount is increased, so that the pipette tip is very inconvenient to use. In view of this, we propose a pipette tip for closed system sample application.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the utility model provides a pipette tip for sample adding of a closed system, and solves the problems that the connection between the existing pipette tip and an injection needle is not firm and the volume of the existing pipette tip is not changeable.

(II) technical scheme

In order to achieve the purpose, the utility model is realized by the following technical scheme: a liquid-transfering gun head for airtight system application of sample, including fixed pipe, fixed intraductal chamber upper portion has the extension pipe through screw thread connection, fixed intraductal chamber upper portion just is located the first spacing ring of threaded below fixedly connected with, fixed intraductal chamber lower part has the connecting pipe through spout sliding connection, fixed intraductal chamber lower part just is located spout top fixedly connected with second spacing ring.

Preferably, the upper part of the outer surface of the expansion pipe is fixedly connected with a first clamping block, and the middle part of the outer surface of the expansion pipe is provided with threads.

Preferably, the lower end of the extension pipe is fixedly connected with a first sealing ring, the upper part of the outer surface of the first sealing ring is sleeved with a rubber sealing sleeve, the upper end face of the rubber sealing sleeve is in mutual contact with a first limiting ring, and the upper part of the inner cavity of the fixed pipe is in sliding connection with the first sealing ring and the rubber sealing sleeve.

Preferably, the upper part of the outer surface of the fixed pipe is provided with annular scale marks, and the lower part of the outer surface of the expansion pipe is provided with an indication block.

Preferably, the lower end of the connecting pipe is fixedly connected with an injection needle, the middle part of the outer surface of the connecting pipe is fixedly connected with a second clamping block, and the upper part of the outer surface of the connecting pipe is fixedly connected with a second sealing ring.

Preferably, the lower part of the inner cavity of the fixed pipe is connected with a connecting pipe, a second clamping block and a second sealing ring in a sliding mode, and the upper end face of the second sealing ring and the second limiting ring are extruded mutually.

(III) advantageous effects

The utility model provides a pipette tip for closed system sample adding. The method has the following beneficial effects:

(1) this a pipette head for airtight system application of sample, screw thread through extension outside of tubes surface middle part setting, in the experimentation, if need absorb more liquid medicines, can fixed pipe of a hand, one hand rotates the extension pipe and drives first sealing ring rebound, and confirm the volume of extension according to extension pipe pivoted number of turns, if the pivoted is not complete number of turns, the accessible sets up the registration number of instructing the piece of extension outside of tubes surface lower part on annular scale mark, confirm the volume that promotes, when rotating the biggest volume, first spacing ring can support first sealing ring, prevent that the extension pipe from droing from fixed pipe.

(2) This a pipette head for airtight system application of sample, syringe needle through connecting pipe lower extreme fixed connection, start work, usable first fixture block is fixed pipe and extension pipe on the pipette head, second fixture block whereabouts is aimed at to the spout that will fix the pipe lower extreme after that, and then place the connecting pipe in the fixed pipe inner chamber, rotate fixed pipe slightly after that, make the second fixture block break away from the spout, and then reach the purpose of fixed syringe needle, when inserting into airtight system again, the second sealing ring can support the second spacing ring, prevent that the connecting pipe from sliding backward.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the split structure of the present invention;

FIG. 3 is a schematic view of a half-section structure of the present invention;

FIG. 4 is an enlarged view of the region A in the junction of FIG. 3;

FIG. 5 is a schematic view of a half-section structure of the fixing tube of the present invention.

In the figure: 1. a fixed tube; 2. an annular scale line; 3. a thread; 4. a first limit ring; 5. A second stop collar; 6. a chute; 7. an extension tube; 8. a first clamping block; 9. a first seal ring; 10. a rubber sealing sleeve; 11. an injection needle; 12. a second seal ring; 13. a connecting pipe; 14. And a second clamping block.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution:

the first embodiment is as follows: a pipette tip for sample adding of a closed system comprises a fixed tube 1, the upper part of the inner cavity of the fixed tube 1 is in threaded connection with an expansion tube 7 through a thread 3, the upper part of the inner cavity of the fixed tube 1 is fixedly connected with a first limit ring 4 below the thread 3, the lower part of the inner cavity of the fixed tube 1 is in sliding connection with a connecting tube 13 through a chute 6, the lower part of the inner cavity of the fixed tube 1 is fixedly connected with a second limit ring 5 above the chute, the upper part of the outer surface of the expansion tube 7 is fixedly connected with a first fixture block 8, the middle part of the outer surface of the expansion tube 7 is provided with the thread 3, the lower end of the expansion tube 7 is fixedly connected with a first sealing ring 9, the upper part of the outer surface of the first sealing ring 9 is sleeved with a rubber sealing sleeve 10, the upper end surface of the rubber sealing sleeve 10 is in mutual contact with the first limit ring 4, the upper part of the inner cavity of the fixed tube 1 is in sliding connection with the first sealing ring 9 and the rubber sealing sleeve 10, the upper part of the outer surface of the fixed tube 1 is provided with an annular scale mark 2, an indicating block is arranged at the lower part of the outer surface of the extension pipe 7. Because extension pipe 7 surface middle part is provided with screw thread 3, in the experimentation, if need absorb more liquid medicines, but fixed pipe 1 of one hand fixation, one hand rotates extension pipe 7 and drives first sealing ring 9 and upwards removes, and confirm the volume of extension according to extension pipe 7 pivoted number of turns, if the pivoted is not complete number of turns, the accessible sets up the registration that indicates at extension pipe 7 surface lower part on annular scale mark 2, confirm the volume of promotion, when rotating the maximum volume, first spacing ring 4 can support first sealing ring 9, prevent that extension pipe 7 from droing from fixed pipe 1.

The second embodiment is different from the first embodiment in that the lower end of the connecting tube 13 is fixedly connected with the injection needle 11, the middle part of the outer surface of the connecting tube 13 is fixedly connected with the second clamping block 14, the upper part of the outer surface of the connecting tube 13 is fixedly connected with the second sealing ring 12, the lower part of the inner cavity of the fixed tube 1 is slidably connected with the connecting tube 13, the second clamping block 14 and the second sealing ring 12, and the upper end surface of the second sealing ring 12 and the second limiting ring 5 are mutually extruded. Because connecting pipe 13 lower extreme fixedly connected with syringe needle 11, when beginning work, usable first fixture block 8 is fixed on the liquid-transfering gun with fixed pipe 1 and extension pipe 7, spout 6 with fixed pipe 1 lower extreme is aimed at second fixture block 14 whereabouts after that, and then place connecting pipe 13 in the fixed pipe 1 inner chamber, rotate fixed pipe 1 slightly after that, make second fixture block 14 break away from spout 6, and then reach the purpose of fixed syringe needle, when inserting into airtight system again, second sealing ring 12 can support second spacing ring 5, prevent that connecting pipe 13 from sliding backward.

When the injection needle fixing device works, the fixed tube 1 and the extension tube 7 can be fixed on a liquid-transferring gun by using the first fixture block 8, then the chute 6 at the lower end of the fixed tube 1 is aligned with the second fixture block 14 to fall, the connecting tube 13 is placed in the inner cavity of the fixed tube 1, then the fixed tube 1 is slightly rotated to enable the second fixture block 14 to be separated from the chute 6, and the purpose of fixing the injection needle is further achieved, when the injection needle is inserted into the closed system, the second sealing ring 12 can abut against the second limiting ring 5 to prevent the connecting tube 13 from sliding backwards, because the thread 3 is arranged in the middle of the outer surface of the extension tube 7, in the experimental process, if more liquid medicine needs to be sucked, the fixed tube 1 can be fixed by one hand, the extension tube 7 is rotated by one hand to drive the first sealing ring 9 to move upwards, the volume of extension is determined according to the number of turns of the extension tube 7, if the number of turns of the extension tube is not complete, the number of the indication block arranged at the lower part of the outer surface of the extension tube 7 can be indicated on the annular scale line 2, to determine the lifting volume, when the maximum volume is reached, the first stop collar 4 will abut against the first sealing ring 9 to prevent the extension pipe 7 from falling out of the fixed pipe 1.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

Claims

1. The utility model provides a liquid-transfering gun head for airtight system application of sample, includes fixed pipe (1), its characterized in that: fixed pipe (1) inner chamber upper portion has extension pipe (7) through screw thread (3) threaded connection, fixed pipe (1) inner chamber upper portion just is located the first spacing ring of below fixedly connected with (4) of screw thread (3), fixed pipe (1) inner chamber lower part has connecting pipe (13) through spout (6) sliding connection, fixed pipe (1) inner chamber lower part just is located spout top fixedly connected with second spacing ring (5).

2. A pipette tip for sample application in a closed system according to claim 1, wherein: the expansion pipe is characterized in that a first clamping block (8) is fixedly connected to the upper portion of the outer surface of the expansion pipe (7), and threads (3) are arranged in the middle of the outer surface of the expansion pipe (7).

3. A pipette tip for sample application in a closed system according to claim 2, wherein: the extension pipe (7) lower extreme fixedly connected with first sealing ring (9), rubber seal cover (10) have been cup jointed on first sealing ring (9) surface upper portion, rubber seal cover (10) up end and first spacing ring (4) contact each other, fixed pipe (1) inner chamber upper portion and first sealing ring (9) and rubber seal cover (10) sliding connection.

4. A pipette tip for sample application in a closed system according to claim 3, wherein: the upper portion of the outer surface of the fixed pipe (1) is provided with annular scale marks (2), and the lower portion of the outer surface of the expansion pipe (7) is provided with an indication block.

5. A pipette tip for sample application in a closed system according to claim 4, characterised in that: the injection needle (11) is fixedly connected with the lower end of the connecting pipe (13), a second clamping block (14) is fixedly connected with the middle part of the outer surface of the connecting pipe (13), and a second sealing ring (12) is fixedly connected with the upper part of the outer surface of the connecting pipe (13).

6. A pipette tip for sample application in a closed system according to claim 5, characterised in that: the lower portion of the inner cavity of the fixed pipe (1) is connected with a connecting pipe (13), a second clamping block (14) and a second sealing ring (12) in a sliding mode, and the upper end face of the second sealing ring (12) is extruded with the second limiting ring (5) mutually.