CN214716731U - Threaded connection limiting and liquid leakage preventing device - Google Patents

Abstract

The utility model discloses a threaded connection limiting and liquid leakage preventing device, which comprises a liquid injector, a sleeve, a connecting pipe, an elastic part, a transfusion needle and a micro-fluidic chip; the connecting pipe is movably sleeved in the liquid injector, and the upper end of the connecting pipe extends out of the sleeve and is in threaded connection with a transfusion port of the liquid injector; the lower end of the connecting pipe is communicated with the upper end of the transfusion needle; the upper end of the connecting pipe is provided with a shaft shoulder, and the inlet of the microfluidic chip is provided with a guide pipe with external threads; when the device is installed, the lower end of the sleeve is provided with an internal thread, the internal thread is connected with the external thread, the sleeve presses against the shaft shoulder to connect the connecting pipe and the infusion needle together, and the connecting pipe enables the lower end of the infusion needle to be inserted into the inlet of the microfluidic chip. The utility model discloses the installation is simple with the dismantlement, convenient and swift, can repetitious operation and recycle to every infusion needle's the degree of compressing tightly can come the independent control through the connection degree between adjusting sleeve and the pipe, can guarantee better that micro-fluidic chip can not damaged.

Description

Threaded connection limiting and liquid leakage preventing device

Technical Field

The utility model belongs to a connect spacing and prevention of liquid leakage device, especially indicate a spacing and prevention of liquid leakage device of threaded connection.

Background

In the field of microfluidic research, the related liquid flow channels are quite fine, so that the limit connection between pipelines has high requirements, otherwise, the problems of liquid leakage and the like can occur.

The leakage-proof structure in the prior art of the Liujin in the 'leakage-proof infusion bottle and leakage-proof infusion equipment' is mainly applied to disposable instruments such as infusion bottles, and once the leakage-proof structure is installed, the leakage-proof structure is complex and inconvenient to disassemble, easily causes chip damage, and is not suitable for being used in micro-fluidic equipment which needs to be disassembled, installed and debugged frequently.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to the above-mentioned problem, provide an installation and dismantle simple, convenient and swift threaded connection spacing and prevention of liquid leakage device. The device can be operated and recycled for many times, the compression degree of each infusion needle can be independently controlled through the connection degree between the adjusting sleeve and the guide pipe, and the micro-fluidic chip can be better ensured not to be damaged.

The purpose of the utility model can be achieved by adopting the following technical scheme:

a threaded connection limiting and liquid leakage preventing device comprises a liquid injector, a sleeve, a connecting pipe, an elastic part, a transfusion needle and a micro-fluidic chip; the connecting pipe is movably sleeved in the liquid injector, and the upper end of the connecting pipe extends out of the sleeve and is in threaded connection with a liquid delivery port of the liquid injector; the lower end of the connecting pipe is communicated with the upper end of the transfusion needle; the upper end of the connecting pipe is provided with a shaft shoulder, and the inlet of the microfluidic chip is provided with a guide pipe with external threads; when the installation, telescopic lower extreme is equipped with the internal thread, internal thread and external screw thread connection, sleeve roof pressure shaft shoulder and link together connecting pipe and transfusion needle, and make the connecting pipe insert the entry of micro-fluidic chip with the lower extreme of transfusion needle, the elastic component cover is located on the transfusion needle, and the up end of transfusion needle and pipe is pushed down respectively to the both ends of elastic component.

As a preferable scheme, a first conical surface is arranged at the lower end of the infusion needle, a second conical surface corresponding to the first conical surface is arranged in the conduit, and the first conical surface and the second conical surface are contacted to limit the lower end of the infusion needle from extending into the microfluidic chip.

Preferably, the shoulder is a tapered surface that presses against the upper end of the sleeve to limit the distance that the upper end of the connecting tube extends into the syringe.

As a preferred scheme, a sealing ring is arranged between the connecting pipe and the transfusion needle.

Preferably, the elastic member is a spring.

Preferably, the seal ring is made of rubber.

Implement the utility model discloses, following beneficial effect has:

1. when the utility model is installed, the external thread structure at the upper end of the connecting pipe is firstly extended out from the upper end of the sleeve, and the thread at the upper end of the connecting pipe is connected with the internal thread in the infusion hole of the infusion device; then the lower end of the transfusion needle is inserted into the conduit, the lower end of the sleeve is aligned with the conduit and the sleeve is rotated to enable the lower end of the sleeve to be in threaded connection with the conduit, and therefore the purpose of connection among the connecting pipe, the transfusion needle and the microfluidic chip is achieved. When the transfusion needle needs to be detached, the sleeve is rotated reversely to be separated from the conduit, the transfusion needle is automatically ejected out of the conduit under the elastic action of the elastic piece, and the assembly and the detachment are simple, convenient and quick.

2. The utility model discloses the installation is simple and convenient with the dismantlement, can repetitious operation and recycle to every infusion needle compresses tightly the degree and can come the independent control through the connection degree between adjusting sleeve and the pipe, can better guarantee that micro-fluidic chip can not damaged.

3. The utility model discloses at the in-process in the entry that rotatory sleeve and drive transfusion needle stretched into micro-fluidic chip, when first conical surface roof pressure second conical surface, transfusion needle can't continue to stretch into little liquid control chip again to play and prevent that micro-fluidic chip is impaired effect.

4. The utility model discloses when constantly stretching into in the notes liquid ware in rotary connecting pipe's upper end, when conical surface roof pressure sleeve moved the sleeve to notes liquid ware direction and annotate the liquid ware contact, the connecting pipe then can't continue to stretch into in the notes liquid ware again to play the effect that the upper end of restriction connecting pipe stretched into the distance of annotating the liquid ware.

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 is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of the threaded connection limiting and liquid leakage preventing device of the present invention.

Fig. 2 is a schematic view of the connection structure between the sleeve and the connecting pipe of the threaded connection spacing and leakage-proof device and the liquid injector.

Fig. 3 is a schematic view of the connection structure of the connection pipe, the elastic member, the infusion needle and the microfluidic chip of the threaded connection limiting and liquid leakage preventing device of the present invention.

Fig. 4 is a schematic view of the internal connection structure of the connecting pipe, the elastic member, the infusion needle and the microfluidic chip of the threaded connection limiting and liquid leakage preventing device of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Examples

Referring to fig. 1 to 4, the present embodiment relates to a threaded connection limiting and liquid leakage preventing device, which includes a liquid injector 1, a sleeve 2, a connecting tube 3, an elastic member 4, a transfusion needle 5 and a microfluidic chip 6; the connecting pipe 3 is movably sleeved in the liquid injector 1, and the upper end of the connecting pipe 3 extends out of the sleeve 2 and is in threaded connection with a transfusion port of the liquid injector 1; the lower end of the connecting pipe 3 is communicated with the upper end of the transfusion needle 5; the upper end of the connecting pipe 3 is provided with a shaft shoulder 31, and the inlet of the microfluidic chip 6 is provided with a conduit 61 with external threads 611; when the installation, the lower extreme of sleeve 2 is equipped with the internal thread, internal thread and external screw thread connection, 2 roof pressure shoulders 31 of sleeve and link together connecting pipe 3 and transfusion needle 5, and make connecting pipe 3 insert the entrance of micro-fluidic chip 6 with the lower extreme of transfusion needle 5, elastic component 4 covers is located on transfusion needle 5, and the up end of elastic component 4's both ends roof pressure transfusion needle 5 and pipe 61 respectively.

When the infusion set is installed, firstly, the external thread structure at the upper end of the connecting pipe 3 extends out of the upper end of the sleeve 2, and the thread at the upper end of the connecting pipe 3 is connected with the internal thread in the infusion hole of the infusion set 1; then the lower end of the transfusion needle 5 is inserted into the conduit 61, the lower end of the sleeve 2 is aligned with the conduit 61, the sleeve 2 is rotated, the lower end of the sleeve 2 is in threaded connection with the conduit 61, and therefore the purpose of connection among the connecting pipe 3, the transfusion needle 5 and the microfluidic chip 6 is achieved. When the transfusion needle 5 needs to be detached, only the sleeve 2 needs to be rotated reversely to separate the sleeve 2 from the guide pipe 61, and the transfusion needle 5 is automatically ejected out of the guide pipe 61 under the elastic action of the elastic piece 4, so that the transfusion needle is simple, convenient and quick to mount and detach.

The device can be operated and recycled for many times, the compression degree of each infusion needle 5 can be independently controlled through the connection degree between the adjusting sleeve 2 and the guide pipe 61, and the micro-fluidic chip 6 can be better ensured not to be damaged.

The lower end of the transfusion needle 5 is provided with a first conical surface 51, the conduit 61 is internally provided with a second conical surface 62 corresponding to the first conical surface 51, and the first conical surface 51 is contacted with the second conical surface 62 to limit the lower end of the transfusion needle 5 from extending into the microfluidic chip 6. In the process that the sleeve 2 is rotated to drive the lower end of the transfusion needle 5 to extend into the inlet of the microfluidic chip 6, when the first conical surface 51 presses the second conical surface 62, the transfusion needle 5 cannot extend into the microfluidic chip 6 any more, so that the effect of preventing the microfluidic chip 6 from being damaged is achieved.

The shoulder 31 is a tapered surface that presses against the upper end of the sleeve 2 to limit the distance that the upper end of the connecting tube 3 extends into the infuser 1. When the upper end of the connecting pipe 3 is rotated and continuously extends into the liquid injector 1, when the conical surface jacking sleeve 2 moves towards the liquid injector 1 to the sleeve 2 to be contacted with the liquid injector 1, the connecting pipe 3 can not extend into the liquid injector 1 any more, thereby playing a role in limiting the distance that the upper end of the connecting pipe 3 extends into the liquid injector 1.

In order to prevent the leakage between the connecting pipe 3 and the transfusion needle 5, a sealing ring 7 is arranged between the connecting pipe 3 and the transfusion needle 5.

The elastic member 4 is a spring. Of course, other materials with better elasticity can be used for the elastic member 4.

The sealing ring 7 is made of rubber materials. Of course, the present sealing ring 7 can be manufactured with only a sealing function.

The above disclosure is only a preferred embodiment of the present invention, and certainly should not be taken as limiting the scope of the invention, which is defined by the claims and their equivalents.

Claims (6)

1. A threaded connection limiting and liquid leakage preventing device is characterized by comprising a liquid injector, a sleeve, a connecting pipe, an elastic part, a transfusion needle and a micro-fluidic chip; the connecting pipe is movably sleeved in the liquid injector, and the upper end of the connecting pipe extends out of the sleeve and is in threaded connection with a liquid delivery port of the liquid injector; the lower end of the connecting pipe is communicated with the upper end of the transfusion needle; the upper end of the connecting pipe is provided with a shaft shoulder, and the inlet of the microfluidic chip is provided with a guide pipe with external threads; when the installation, telescopic lower extreme is equipped with the internal thread, internal thread and external screw thread connection, sleeve roof pressure shaft shoulder and link together connecting pipe and transfusion needle, and make the connecting pipe insert the entry of micro-fluidic chip with the lower extreme of transfusion needle, the elastic component cover is located on the transfusion needle, and the up end of transfusion needle and pipe is pushed down respectively to the both ends of elastic component.

2. The threaded connection limiting and leakage preventing device of claim 1, wherein the lower end of the infusion needle is provided with a first tapered surface, the conduit is provided with a second tapered surface corresponding to the first tapered surface, and the first tapered surface and the second tapered surface are in contact to limit the lower end of the infusion needle from extending into the microfluidic chip.

3. The threaded connection limiting and leakage preventing device of claim 1, wherein the shoulder is a tapered surface that presses against the upper end of the sleeve to limit the distance that the upper end of the connecting tube extends into the syringe.

4. A threaded connection position limiting and leakage preventing device according to any one of claims 1 to 3, wherein a sealing ring is arranged between the connection tube and the infusion needle.

5. The apparatus as claimed in claim 1, wherein the elastic member is a spring.

6. The threaded connection limiting and leakage preventing device of claim 4, wherein the sealing ring is made of rubber.

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