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CN-224208051-U - Multipath liquid taking head and liquid transferring gun thereof

CN224208051UCN 224208051 UCN224208051 UCN 224208051UCN-224208051-U

Abstract

The utility model provides a multipath liquid taking head which comprises a connecting part, a transition part and a liquid taking part, wherein the connecting part is used for being connected with a liquid sucking head of a liquid taking gun body, the bottom of the connecting part is detachably connected with the transition part used for preventing liquid from flowing backwards, the bottom of the transition part is detachably connected with the liquid sucking head, the connecting part comprises a plurality of integrally formed sleeves with different diameters and is used for being connected with liquid taking guns with different specifications.

Inventors

  • YAN JIE
  • LI XUAN
  • REN ZHENZHEN

Assignees

  • 天津汉一医药科技有限公司

Dates

Publication Date
20260508
Application Date
20250509

Claims (10)

  1. 1. The multipath liquid taking head is characterized by comprising a connecting part (2), a transition part (3) and a liquid taking part (4), wherein the connecting part (2) is used for being connected with a liquid sucking head (11) of a liquid transferring gun body (1), the bottom of the connecting part is detachably connected with the transition part (3) for preventing liquid from flowing reversely, the bottom of the transition part (3) is detachably connected with the liquid sucking head (11), and the connecting part (2) comprises a plurality of integrally formed sleeves (21) with different diameters and is used for being connected with liquid transferring guns of different specifications.
  2. 2. The multipath liquid taking head according to claim 1 is characterized in that the transition part (3) comprises a connecting cylinder (31), the top of the connecting cylinder (31) is connected with the connecting part (2) through threads, the bottom of the connecting cylinder (31) is connected with the liquid taking part (4) through threads, and a filter membrane (32) is fixedly connected to the inner side wall of the transition part (3).
  3. 3. A multipaths head according to claim 2, characterized in that the filter (32) is a PTFE membrane and has a pore size in the range of 0.22 μm to 0.45 μm for blocking back flow of aerosols or particles contaminating the pipette.
  4. 4. A multipath liquid sampling head according to claim 2, characterized in that the outer side wall of the connecting cylinder (31) is integrally formed with an annular bulge (33), and the outer side wall of the annular bulge (33) is provided with an anti-slip pattern.
  5. 5. The multipath liquid taking head according to claim 1 is characterized in that the connecting portion (2) comprises at least two sleeves (21) with different diameters, all the sleeves (21) are sequentially reduced from top to bottom, the lowest sleeve (21) is connected with the transition portion (3), the transition between the inner side walls of each sleeve (21) is in a chamfer angle (22), a plurality of sealing rings (23) are arranged on the inner side wall of each sleeve (21), and the cross section of each sealing ring (23) is semicircular.
  6. 6. The multi-path liquid taking head according to claim 5, wherein at least two sealing rings (23) are fixedly connected to the inner side wall of each sleeve (21), and the diameters of the sealing rings (23) in each sleeve (21) are sequentially increased from top to bottom.
  7. 7. A multi-path liquid extraction head according to claim 6, characterized in that the sealing ring (23) is of thermoplastic elastomer.
  8. 8. The multi-path liquid taking head according to claim 1, wherein the liquid taking part (4) comprises at least two liquid taking pipes (41) with gradually changed diameters which are integrally formed, each liquid taking pipe (41) integrally extends downwards in an inverted cone shape, and the transition between the inner side walls of each liquid taking pipe (41) is a round corner (42).
  9. 9. The multi-path liquid taking head according to claim 8, wherein the inner side wall of the liquid taking part (4) is provided with a hydrophobic layer in a spraying manner, and the hydrophobic layer is made of a silicon oxide-polytetrafluoroethylene composite material.
  10. 10. A pipetting gun comprises a pipetting gun body (1), wherein a pipetting head (11) is arranged at the bottom of the pipetting gun body (1), and the pipetting gun is characterized in that the pipetting head (11) is connected with any one of the multipath pipetting heads in the claims 1-9.

Description

Multipath liquid taking head and liquid transferring gun thereof Technical Field The utility model relates to the field of medical pipetting guns, in particular to a multipath liquid taking head and a pipetting gun thereof. Background The liquid taking head is used as a part of the liquid taking gun which is in direct contact with a liquid sample, and the design of the liquid taking head directly influences the accuracy and efficiency of liquid taking and the safety of an experimental process; The liquid taking heads of the traditional liquid taking gun are usually made of plastic materials and are designed into standard sizes or limited specifications so as to adapt to liquid taking guns with different capacities, and the liquid taking heads are usually disposable so as to ensure the cleaning of experiments and avoid cross contamination; On the one hand, the traditional liquid taking heads have limited specifications, and can not be perfectly matched with all types of liquid taking guns, so that the universality and the flexibility of the liquid taking guns are limited; On the other hand, the performance of the traditional liquid taking head in terms of pollution prevention and leakage prevention is still to be improved. Although disposable tips help to reduce the risk of cross-contamination, if the joint of the tip and the pipette is not tightly sealed or the tip itself is defective when handling high concentration, high toxicity or high infectivity samples, it may still cause sample leakage or aerosol contamination, which constitutes a potential threat to laboratory personnel and laboratory environment. Disclosure of utility model In order to solve the problems of the traditional liquid-taking gun liquid-taking head in the prior art in aspects of specification compatibility, pollution prevention performance, and the like, the utility model provides a multipath liquid-taking head and a liquid-taking gun thereof; the utility model provides a multipath liquid taking head and a liquid transferring gun thereof, which adopt the following technical scheme: On one hand, the multipath liquid taking head comprises a connecting part, a transition part and a liquid taking part, wherein the connecting part is used for being connected with the liquid sucking head of the liquid transferring gun body, and the bottom part is detachably connected with the transition part for preventing liquid from flowing backwards; The transition part comprises a connecting cylinder, wherein the top of the connecting cylinder is connected with the connecting part through threads, the bottom of the connecting cylinder is connected with the liquid taking part through threads, and the inner side wall of the transition part is fixedly connected with a filter membrane; Further, the filter membrane is a PTFE membrane, and the pore diameter range is 0.22-0.45 mu m, so as to prevent aerosol or particles from flowing back to pollute the pipette; Further, an annular bulge is integrally formed on the outer side wall of the connecting cylinder, and an anti-skid pattern is formed on the outer side wall of the annular bulge; The connecting part comprises at least two sleeves with different diameters, wherein the diameters of all the sleeves are sequentially reduced from top to bottom, the lowest sleeve is connected with the transition part, the transition between the inner side walls of each sleeve is in a chamfer angle, the inner side wall of each sleeve is provided with a plurality of sealing rings, and the cross section of each sealing ring is semicircular; Further, at least two sealing rings are fixedly connected to the inner side wall of each sleeve, and the diameters of the sealing rings in each sleeve are sequentially increased from top to bottom; further, the sealing ring is made of thermoplastic elastomer; The liquid taking part comprises at least two liquid taking pipes with gradually changed diameters, wherein each liquid taking pipe is integrally formed, the liquid taking pipe is downward extended in an inverted cone shape, and the transition between the inner side walls of each liquid taking pipe is a round angle; Furthermore, a hydrophobic layer is sprayed on the inner side wall of the liquid taking part, and the hydrophobic layer is made of a silicon oxide-polytetrafluoroethylene composite material. On the other hand, a liquid-transfering gun comprises a liquid-transfering gun body, wherein a liquid-transfering head is arranged at the bottom of the liquid-transfering gun body and is connected with the multipath liquid-transfering head. In summary, the beneficial effects of the utility model are as follows: According to the technical scheme, the multi-path liquid taking head connecting part comprising a plurality of sleeves with different diameters is designed, so that the multi-path liquid taking head connecting part can be adapted to liquid taking guns with most specifications on the market, the universality and the flexibility of liqu