CN216201363U - Liquid chromatogram transfer line coupling assembling - Google Patents
Liquid chromatogram transfer line coupling assembling Download PDFInfo
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- CN216201363U CN216201363U CN202121963204.7U CN202121963204U CN216201363U CN 216201363 U CN216201363 U CN 216201363U CN 202121963204 U CN202121963204 U CN 202121963204U CN 216201363 U CN216201363 U CN 216201363U
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Abstract
The utility model discloses a liquid chromatography infusion tube connecting component, and relates to the field of liquid chromatography detection. Comprises a two-way pipe joint and a connecting piece; the connecting piece comprises a connecting head and a double-cone edge ring; the inner part of the connector is provided with an installation through hole for the pipeline to pass through, and the apertures of the two ends of the installation through hole are gradually enlarged into conical sections; the double-cone blade ring is of a symmetrical structure, and the diameters of two ends of the double-cone blade ring are gradually reduced to form a cone shape; the two-way pipe joint is provided with an inner cavity, the inner cavity comprises a fixed port and a flow channel, the two sides of the fixed port are connected with the connecting piece, the flow channel is used for liquid to flow in the middle of the fixed port, and the fixed port is sequentially provided with a fixed section, a conical groove and a pipeline section; the shape of the conical groove is matched with that of the double-conical blade ring; the connecting pieces are symmetrically arranged at two ends of the infusion tube and can be inserted into the two-way tube joint, and two ends of the double-cone blade ring are respectively and tightly attached to the cone-shaped section and the cone-shaped groove. The utility model has simple structure, is not limited by the length of the infusion tube, can manufacture pipelines with any length and can realize the high-pressure sealing of the whole pipeline.
Description
Technical Field
The utility model relates to the field of liquid chromatography detection, in particular to a liquid chromatography infusion tube connecting assembly.
Background
Analytical liquid chromatography detection plays an important role in basic research in the fields of food, medicine, environmental protection, life science, petrochemical industry and the like. In order to realize the transportation of liquid mobile phase in liquid chromatography, a large number of infusion tubes made of different materials and with different specifications are required to be used for connection inside and outside the instrument.
In high pressure bioanalysis, the tubing connections are often custom made to the integrated infusion tube as needed in length. Because the infusion tube and the connecting part are of an integrated structure, parameters such as the length, the outer diameter and the material of the infusion tube need to be provided before processing, and then the infusion tube is processed uniformly by manufacturers according to specification requirements. The integrated infusion tube usually has the requirement of minimum volume of order and is only suitable for mass purchase. When the length of the infusion tube is changed, the infusion tube cannot be quickly processed, and the flexibility is poor. Therefore, the infusion tubes need to be assembled by using the connecting pieces among the infusion tubes, and the requirements on the lengths of the different infusion tubes are met.
Common liquid chromatography connecting piece materials are divided into two main types, one is a metal material such as stainless steel, titanium alloy, Hastelloy and the like, and the other is a high polymer material such as PTFE, PEEK and the like. The metal material connecting piece has the characteristic of high pressure resistance, but has poor biocompatibility and cannot be used in biological related analysis tests. Compared with the traditional high polymer material, the high polymer material has excellent biocompatibility, but the high polymer material has poor pressure resistance, and the connecting piece part often has the phenomena of leakage and loosening under the high pressure condition, and even causes the damage of the connecting piece when the connecting piece is serious.
Therefore, a special high polymer material connecting piece for liquid chromatography is urgently needed, and high pressure tolerance and sealing effect are required.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides the special connecting piece for the liquid chromatography transfusion tube, which has the advantages of good biocompatibility, high pressure resistance, simple structure, easy installation and low cost.
The technical scheme adopted by the utility model is as follows:
a liquid chromatography transfusion tube connecting component comprises a connecting piece and a two-way pipe joint;
the connecting piece comprises a connecting head and a double-cone edge ring;
the inner part of the connector is provided with an installation through hole for a pipeline to pass through, and the apertures of the two ends of the installation through hole are gradually enlarged into conical sections; the double-cone edge ring is provided with a through hole for a pipeline to pass through, the double-cone edge ring is of a symmetrical structure, and the diameters of two ends of the double-cone edge ring are gradually reduced into a cone shape;
the two-way pipe joint is provided with an inner cavity, and the inner cavity comprises a fixed port and a flow channel, wherein the two sides of the fixed port are connected with the connecting piece, and the flow channel is used for liquid to flow in the middle of the fixed port; the fixed port is sequentially provided with a fixed section, a conical groove and a pipeline section; the shape of the conical groove is matched with that of the double-conical blade ring;
the connecting pieces are symmetrically arranged at two ends of the infusion tube and can be inserted into the two-way tube joint, and two ends of the double-cone blade ring are respectively and tightly attached to the cone-shaped section and the cone-shaped groove.
Preferably, the connecting piece further comprises a hoop, and the hoop is annular and fixedly sleeved on the outer side wall of the double-cone-edge ring;
preferably, the clamp and the double-tapered edge ring are in interference fit.
Preferably, the connector is inserted in the fixing section of the two-way pipe joint in a sealing manner, at least the outer side wall of the insertion part of the connector is provided with an external thread, the inner wall of the end face of the fixing section is provided with an internal thread, and the connecting piece is in threaded connection with the two-way pipe joint.
Preferably, the inner diameter of the pipe section is slightly larger than the outer diameter of the pipe.
Preferably, the diameter of the mounting through hole is the same as the inner diameter of the double-tapered edge ring.
Preferably, the inner cross-sectional diameter of the flow channel is smaller than the diameter of the pipe section.
Compared with the prior art, the utility model has the beneficial effects that:
1. after the connector is screwed down, one end of the double-cone edge ring is tightly attached to the conical section on the connector, and the other end of the double-cone edge ring is tightly attached to the conical groove in the two-way pipe connector, so that high-pressure sealing of the whole pipeline can be realized.
2. The stainless steel metal hoop is nested outside the double-cone edge ring, so that the strength of the PEEK double-cone edge ring can be effectively improved, and the PEEK double-cone edge ring is not easy to deform and damage.
3. The utility model has simple mechanism and low price; the mechanism is not limited by the length of the infusion tube, and can be used for manufacturing pipelines with any length according to the requirement. The pipeline connecting piece is easy to assemble without special tools, and the liquid flowing contact part is made of polymer materials, so that the biocompatibility is effectively ensured.
4. The utility model can be used for connecting high polymer material transfusion tubes, and the structure can also be used for connecting metal transfusion tubes with small outer diameters.
Drawings
FIG. 1 is a schematic view of a connector configuration according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a connector assembly in accordance with an embodiment of the present invention;
FIG. 3 is an assembly schematic of a liquid chromatography infusion tube connection assembly in an embodiment of the utility model;
FIG. 4 is a schematic view of a coupling structure for a thin outer diameter metal tube in an embodiment of the present invention;
reference numerals:
1-a connector; 2-a two-way pipe joint; 3-a connector; 4-double conical blade ring, 5-clamp and 6-infusion tube;
7-a fixed segment; 8-a tapered recess; 9-a pipe section; 10-a flow channel; 11-metal infusion tube with thin outer diameter.
Detailed Description
In order to make the purpose and technical solution of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention.
In the description of the present application, it is to be understood that the terms "length," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship as shown in the drawings, which are used for convenience in describing and simplifying the present application, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present application.
As shown in fig. 1-3, a liquid chromatography infusion tube connection assembly. Comprises a connecting piece 1 and a two-way pipe joint 2; the connecting pieces 1 are symmetrically arranged at two ends of the infusion tube 6 and can be inserted into the two-way tube joint 2, so that the two infusion tubes 6 can be inserted into the same two-way tube joint 2 through the connecting pieces 1 arranged at the end parts, and the pipeline connection is realized.
The connecting piece 1 comprises a connector 3, a double-cone edge ring 4 and a clamp 5; the inside installation through-hole that can supply the pipeline to pass that is equipped with of connector 3 is last the both ends aperture of installation through-hole enlarges gradually for the toper section, is equipped with the external screw thread on the 3 one end lateral walls of connector, and this screw thread end penetrates 6 one ends of transfer line towards the 6 outsides of transfer line, axial. The double-cone edge ring 4 is made of PEEK material, is provided with a through hole for the liquid conveying pipe 6 to pass through, penetrates one end of the liquid conveying pipe 6 in the same way, is of a symmetrical structure, is cylindrical in the middle and is tapered at the two ends. The inner side wall of the conical section of the connector 3 is attached to the outer side wall of the conical end of the double-conical edge ring 4. The diameter of the installation through hole of the connector 3 is the same as the inner diameter of the double-cone edge ring 4, so that the infusion tube 6 can smoothly pass through the installation through hole.
The hoop 5 is annular and made of stainless steel material and is provided with a through hole. After the clamp 5 axially penetrates into the infusion tube 6, the clamp is fixedly sleeved on the cylindrical outer side wall in the middle of the double-cone-edge ring 4. The clamp 5 and the double-cone edge ring 4 are in interference fit and are not easy to fall off. The other end of the infusion tube 6 is also provided with the same connector 3, a double-cone edge ring 4 and a clamp 5, and the connectors 1 at the two ends of the infusion tube 6 are arranged in mirror symmetry.
The two-way pipe joint 2 is internally provided with an inner cavity which can be provided with the connecting piece 1 and can be used for liquid to flow; the inner cavity comprises a fixed port and a flow channel 10, wherein the two sides of the fixed port are connected with the connecting piece 1, and the middle of the flow channel is used for liquid to flow; the fixing port matches the shape of the connector 1. The fixed port is sequentially provided with a fixed section 7, a conical groove 8 and a pipeline section 9; the shape of the conical groove 8 is matched with that of the conical end surface of the double-conical edge ring 4; the connector 1 is inserted in the fixing section 7 of the two-way pipe connector 2 in a sealing mode, external threads are at least arranged on the outer side wall of the inserting portion of the connector 1, internal threads are arranged on the inner wall of the end face of the fixing section 7, and the connector 1 is in threaded connection with the two-way pipe connector 2. The fixed section 7 is also provided with a conical groove 8 matched with the conical end surface of the double-conical edge ring 4 in shape; when the connecting piece 1 is installed inside the two-way pipe joint 2, one end of the double-cone edge ring 4 is tightly attached to the conical section on the connecting head 3, and the other end of the double-cone edge ring is tightly attached to the conical groove 8 inside the two-way pipe joint 2. The pipeline section 9 is used for accommodating the infusion tube 6 extending out of the tail end of the connecting piece 1, and the inner diameter of the pipeline section 9 is slightly larger than the outer diameter of the infusion tube 6. The two-way pipe joint 2 is made of high polymer materials and has excellent biocompatibility. The diameter of the inner cross section of the flow channel 10 is smaller than that of the pipeline section 9, so that the liquid can be ensured to flow through, and meanwhile, the connection length of the infusion tube 6 can be controlled by the stepped design.
When in use, one end of the infusion tube 6 is sleeved with the connector 3, the double-cone edge ring 4 and the clamp 5 in sequence. The external thread end of the connector 3 is screwed into the internal thread of the two-way pipe connector 2, the connector 3 is gradually screwed by a tool wrench, so that the conical groove 8 at the external thread end of the connector 3 is tightly combined with the conical surface at one end of the double-cone edge ring 4, and the conical surface at the other side of the double-cone edge ring 4 is tightly combined with the conical groove 8 at the inner side of the two-way pipe connector 2. Influenced by the extrusion force, the double-cone edge ring 4 slightly deforms and inwards holds the infusion tube 6 tightly, and meanwhile, the clamp 5 made of stainless steel metal is fixed on the outer side wall of the double-cone edge ring 4, so that the double-cone edge ring 4 cannot deform outwards and is damaged. When high-pressure liquid flows through the inside of the transfusion tube 6, the outer wall of the high polymer material transfusion tube 6 is stressed to expand outwards, and the inner wall of the double-cone edge ring 4 is further extruded, so that the high polymer material transfusion tube is not easy to loosen and leak liquid.
As shown in fig. 4, by slightly adjusting this structure, the connection of the metal infusion tube 11 having a small outer diameter can be realized. The specific implementation mode is as follows: a high polymer material transfusion tube 6 with the length of about 2 cm is cut out and sleeved into one end of a metal transfusion tube 11 with a thin outer diameter, and then a connector 3, a double-cone edge ring 4 and a hoop 5 are sleeved in sequence. The connection method is the same as the connection method of the macromolecule transfusion tube.
The above are merely embodiments of the present invention, which are described in detail and with particularity, and therefore should not be construed as limiting the scope of the utility model. It should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the spirit of the present invention, and these changes and modifications are within the scope of the present invention.
Claims (7)
1. The utility model provides a liquid chromatogram transfer line coupling assembling which characterized in that:
comprises a two-way pipe joint and a connecting piece;
the connecting piece comprises a connecting head and a double-cone edge ring;
the inner part of the connector is provided with an installation through hole for a pipeline to pass through, and the apertures of the two ends of the installation through hole are gradually enlarged into conical sections;
the double-cone edge ring is provided with a through hole for a pipeline to pass through, the double-cone edge ring is of a symmetrical structure, and the diameters of two ends of the double-cone edge ring are gradually reduced into a cone shape;
the two-way pipe joint is provided with an inner cavity, and the inner cavity comprises a fixed port and a flow channel, wherein the two sides of the fixed port are connected with the connecting piece, and the flow channel is used for liquid to flow in the middle of the fixed port;
the fixed port is sequentially provided with a fixed section, a conical groove and a pipeline section; the shape of the conical groove is matched with that of the conical end surface of the double-conical edge ring;
the connecting pieces are symmetrically arranged at two ends of the infusion tube and can be inserted into the two-way tube joint, and two ends of the double-cone blade ring are respectively and tightly attached to the cone-shaped section and the cone-shaped groove.
2. The liquid chromatography tubing connection assembly of claim 1, wherein: the connecting piece further comprises a hoop which is annular and fixedly sleeved on the outer side wall of the double-cone blade ring.
3. A liquid chromatography tubing connection assembly as claimed in claim 2, wherein: the clamp and the double-cone edge ring are in interference fit.
4. The liquid chromatography tubing connection assembly of claim 1, wherein: the connector is inserted in the fixing section of the two-way pipe joint in a sealing manner, at least the outer side wall of the inserting part of the connector is provided with an external thread, the inner wall of the end face of the fixing section is provided with an internal thread, and the connecting piece is in threaded connection with the two-way pipe joint.
5. The liquid chromatography tubing connection assembly of claim 1, wherein: the inner diameter of the pipeline section is slightly larger than the outer diameter of the pipeline.
6. The liquid chromatography tubing connection assembly of claim 1, wherein: the diameter of the installation through hole is the same as the inner diameter of the double-cone edge ring.
7. The liquid chromatography tubing connection assembly of claim 1, wherein: the flow channel has an inner cross-sectional diameter that is less than the diameter of the pipe section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121963204.7U CN216201363U (en) | 2021-08-20 | 2021-08-20 | Liquid chromatogram transfer line coupling assembling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121963204.7U CN216201363U (en) | 2021-08-20 | 2021-08-20 | Liquid chromatogram transfer line coupling assembling |
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| Publication Number | Publication Date |
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| CN216201363U true CN216201363U (en) | 2022-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121963204.7U Active CN216201363U (en) | 2021-08-20 | 2021-08-20 | Liquid chromatogram transfer line coupling assembling |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114962815A (en) * | 2022-06-24 | 2022-08-30 | 中国重型机械研究院股份公司 | Pipeline system for ultrahigh pressure fluid transmission |
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2021
- 2021-08-20 CN CN202121963204.7U patent/CN216201363U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114962815A (en) * | 2022-06-24 | 2022-08-30 | 中国重型机械研究院股份公司 | Pipeline system for ultrahigh pressure fluid transmission |
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