CN220170961U - Penetrating type metal cutting ferrule capillary chromatographic column connecting device - Google Patents
Penetrating type metal cutting ferrule capillary chromatographic column connecting device Download PDFInfo
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- CN220170961U CN220170961U CN202320551588.4U CN202320551588U CN220170961U CN 220170961 U CN220170961 U CN 220170961U CN 202320551588 U CN202320551588 U CN 202320551588U CN 220170961 U CN220170961 U CN 220170961U
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- chromatographic column
- capillary chromatographic
- cap
- connecting seat
- metal
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- 239000002184 metal Substances 0.000 title claims abstract description 85
- 230000000149 penetrating effect Effects 0.000 title abstract description 7
- 238000007789 sealing Methods 0.000 claims abstract description 30
- 230000006835 compression Effects 0.000 claims description 13
- 238000007906 compression Methods 0.000 claims description 13
- 239000007769 metal material Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 5
- 210000001503 joint Anatomy 0.000 abstract 2
- 238000006388 chemical passivation reaction Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 229910052755 nonmetal Inorganic materials 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000004587 chromatography analysis Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Abstract
The utility model discloses a penetrating metal cutting ferrule capillary chromatographic column connecting device, and belongs to the field of capillary chromatographic column connection. The connecting device comprises a two-way connecting seat, wherein a metal clamping sleeve is fixedly connected in the two-way connecting seat, a capillary chromatographic column is fixedly connected in the metal clamping sleeve, a pressing cap is rotationally connected on the two-way connecting seat, central capillary through holes are also formed in the pressing cap and the clamping sleeve, and the central capillary through holes formed in the pressing cap and the clamping sleeve are matched with the diameters of the capillary chromatographic column; according to the utility model, the metal clamping sleeve is tightly pressed by the pressing cap, the plastic deformation of the tip end of the metal clamping sleeve is realized by the pressing cap, the fixation and the sealing of the capillary chromatographic column are completed, the butt joint and the sealing of the end head of the capillary chromatographic column are realized by mutually pressing the bottom planes of the metal clamping sleeve, and the dead volume in the gas path can be obviously reduced. Because the capillary chromatographic column is in butt joint and seal in the metal cutting sleeve, the pressing cap and the connecting seat are not in contact with the gas circuit, chemical passivation treatment is not required to be carried out on the pressing cap and the connecting seat, and the process cost is reduced.
Description
Technical Field
The utility model relates to the technical field of capillary chromatographic column connection, in particular to a penetrating metal cutting ferrule capillary chromatographic column connection device.
Background
At present, in the field of gas chromatography detection of chemical analysis technology, engineers need to frequently combine and switch capillary chromatographic column systems according to different detection objects, and need to complete connection combination of different types of capillary chromatographic columns by utilizing various capillary chromatographic column connection devices according to performance characteristics of various types of capillary chromatography. Among the types of capillary chromatography column connection devices commonly used are: 1. the two-way quartz glass tube realizes clamping and sealing with the capillary chromatographic column through the diameter change of the inner pore, has the advantages of small dead volume after connection, simple and convenient installation, and has the defects of higher price, low connection strength and easy air leakage, the ports of the capillary column can not be reused, and the capillary chromatographic column needs to be cut every time of connection, so that the length of the column is changed; 2. the nonmetallic cutting ferrule two-way connector has the advantages that the nonmetallic cutting ferrule is tightly pressed and deformed to tightly hold the capillary chromatographic column after being pressed and deformed, so that the connection and sealing of the gas circuit are realized, the advantages of high connection strength and reliable installation are realized, the cutting ferrule is disposable, the capillary chromatographic column is required to be cut for each connection, the change of the length of the column is caused, the dead volume of the gas circuit is large, and the gas leakage condition is easy to occur due to the fact that the difference of the temperature between the gas circuit and the gas circuit is too large in the test method; 3. the metal cutting ferrule two-way connector is characterized in that the metal cutting ferrule is tightly pressed and deformed to tightly hold the capillary chromatographic column, and the cutting ferrule is tightly held after being deformed to tightly hold the capillary chromatographic column, so that the connection and the sealing of an air passage are realized.
In the prior art, after the metal connectors adopting the non-metal cutting ferrule are subjected to thermal circulation at a higher temperature, the non-metal cutting ferrule has a gas leakage phenomenon due to the fact that the thermal expansion coefficient is different from that of the metal connecting seat; in addition, when the non-metal cutting ferrule is excessively locked and excessive plastic deformation is generated, the non-metal cutting ferrule is blocked inside a port of the metal connecting seat with probability, the metal tool is required to be adopted to damage the waste cutting ferrule to take out the waste cutting ferrule, and the sealing surface and threads of the metal connecting seat are easy to get in the damage process, so that the metal connecting seat is scrapped.
Aiming at the problems in the prior art, we provide a connecting device for a penetrating metal ferrule capillary chromatographic column.
Disclosure of Invention
The utility model aims to solve the problems of non-reusability of a capillary column port, high consumption rate of a clamping sleeve and large dead volume of a connecting device in the prior art, and provides a penetrating type metal clamping sleeve capillary chromatographic column connecting device.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the utility model provides a run-through metal cutting ferrule capillary chromatographic column connecting device, connecting device includes two-way connecting seat and capillary chromatographic column, has seted up high accuracy locating hole in the two-way connecting seat, fixedly connected with cutting ferrule in the locating hole, rotates on the two-way connecting seat and is connected with the pressure cap, also has all seted up in pressure cap and the metal cutting ferrule with capillary chromatographic column assorted central capillary hole.
Preferably, the end part of the two-way connecting seat is provided with a connecting port, the outside of the pressing cap is provided with a thread, the connecting port is provided with a threaded hole, and the external thread of the pressing cap is matched with the threaded hole of the connecting port.
Preferably, the end part of the pressing cap is provided with a high-precision first positioning column, and the first positioning column is matched with the positioning hole of the two-way connecting seat.
Preferably, one end of the metal cutting sleeve facing the pressing cap is provided with a sealing conical surface, the end part of the pressing cap is provided with a pressing conical surface, and the sealing conical surface of the metal cutting sleeve is meshed with the pressing conical surface provided at the end part of the pressing cap.
Preferably, one end of the metal cutting ferrule facing the connecting seat is provided with a sealing plane, and the sealing planes of the two metal cutting ferrules are mutually pressed to realize the sealing of the gas circuit.
Preferably, the external screw thread of the pre-pressing cap is matched with the screw hole of the connecting port.
Preferably, the end part of the pre-pressing cap is provided with a high-precision second positioning column, and the second positioning column is matched with the positioning hole of the two-way connecting seat.
Preferably, the two-way connecting seat, the pressing cap and the pre-pressing cap are all made of high-temperature-resistant and high-strength metal materials, and the metal clamping sleeve is made of high-temperature-resistant and low-strength metal materials.
Preferably, the outer part of the two-way connecting seat adopts a quadrilateral structure which is matched with a standard hexagonal wrench, and the end parts of the pressing cap and the pre-pressing cap adopt standard hexagonal structures.
Compared with the prior art, the utility model provides the connecting device for the penetrating metal ferrule capillary chromatographic column, which has the following beneficial effects:
1. according to the capillary chromatographic column connecting device, other metal structures except the metal clamping sleeve do not participate in the composition of an internal gas circuit, so that the polarization and adsorption of a metal body to a detected object can be avoided, the detection result can be improved, and the half-peak width and tailing phenomena of heavy components are reduced.
2. According to the capillary chromatographic column connecting device, the gas path is sealed in a mode that sealing planes between metal clamping sleeves are mutually pressed, compared with the conventional conical surface end engagement, the sealing mode is achieved through the linear contact mode that the gas path is sealed through deformation of the clamping sleeve conical surface, and the dead volume in the gas path can be obviously reduced.
3. The pressing cap on the capillary chromatographic column connecting device is provided with a high-precision pressing conical surface matched with the metal clamping sleeve, and when the pressing cap is pressed down by rotating force, the conical surface can ensure the centering of the central hole of the metal clamping sleeve and the metal clamping sleeve; in addition, the pressing cap is matched with the positioning holes of the two-way connecting seat through the positioning columns, so that the centering of the pressing cap and the two-way connecting seat is ensured, the centering accuracy of the metal clamping sleeves on two sides is realized, the centering dislocation of the capillary chromatographic column connection is avoided, and the dead volume and the extra air resistance of the air circuit are generated.
4. The pre-pressing cap of the capillary chromatographic column connecting device can realize independent pre-fastening of the metal clamping sleeve and the capillary chromatographic column, can improve the sealing and fixing effects of the metal clamping sleeve and the capillary chromatographic column, and reduces the operation complexity of personnel when simultaneously installing and fixing the two side pressing caps.
5. The connecting seat on the capillary chromatographic column connecting device is provided with a fixed inserting sheet, and can be installed and fixed with a matched accessory bracket in a rapid inserting mode, so that the rapid operation of the two-way device in the column temperature box is realized.
Drawings
Fig. 1 is an overall schematic diagram of a through-type metal ferrule capillary chromatographic column connection device according to the present utility model;
fig. 2 is an overall structure diagram of a through-type metal ferrule capillary chromatographic column connecting device provided by the utility model.
FIG. 3 is a schematic illustration of the installation of a pre-compression cap of a through-metal ferrule capillary chromatographic column connection device according to the present utility model;
FIG. 4 is a schematic exploded view of a connecting device for a capillary chromatographic column with a through-type metal ferrule according to the present utility model;
fig. 5 is a schematic metal ferrule structure of a through-type metal ferrule capillary chromatographic column connection device according to the present utility model;
fig. 6 is a schematic diagram of a press cap structure of a through-type metal ferrule capillary chromatographic column connecting device according to the present utility model;
fig. 7 is a schematic diagram of a two-way connection seat of a connection device for a capillary chromatographic column with a through-type metal ferrule according to the present utility model;
FIG. 8 is a schematic view of a pre-compression cap of a through-metal ferrule capillary chromatographic column connection device according to the present utility model;
in the figure: 1. a two-way connecting seat; 101. an observation hole; 102. positioning holes; 103. fixing the bolt; 104. a connection port; 2. a metal ferrule; 201. capillary holes; 202. sealing the conical surface; 203. a sealing plane; 3. pressing the cap; 301. compacting the conical surface; 302. a first positioning column; 303. capillary holes; 304. a hexagonal head; 4. pre-pressing the cap; 401. a second positioning column; 402. a pressing plane; 403. a hexagonal head; 5. capillary chromatographic column.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.
In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Referring to fig. 1-8, a through type metal cutting ferrule capillary chromatographic column connecting device comprises a two-way connecting seat 1 and a capillary chromatographic column 5, wherein a metal cutting ferrule 2 is fixedly connected in the two-way connecting seat 1, a pressing cap 3 is rotatably connected on the two-way connecting seat 1, central capillary through holes 201 and 303 are formed in the pressing cap 3 and the metal cutting ferrule 2, and the central capillary through holes 201 and 303 formed in the pressing cap 3 and the metal cutting ferrule 2 are matched with the capillary chromatographic column 5.
The end part of the two-way connecting seat 1 is provided with a connecting port 104, the outside of the pressure cap 3 is provided with threads, the connecting port 104 is provided with a threaded hole, and the external threads of the pressure cap 3 are matched with the threaded hole of the connecting port 104.
The end of the metal cutting ferrule 2, which is close to the press cap 3, is provided with a sealing conical surface 202, and the end of the press cap 3, which is close to the two-way connecting seat 1, is provided with a high-precision pressing conical surface 301, and the sealing conical surface 202 of the metal cutting ferrule 2 is meshed with the pressing conical surface 301 on the press cap 3.
The end part of the press cap 3 is provided with a high-precision first positioning column 302, and the first positioning column 302 is matched with the positioning hole 102 of the two-way connecting seat 1.
One end of the metal cutting ferrule 2 facing the two-way connecting seat 1 is provided with a sealing plane 203, and the sealing planes 203 of the two metal cutting ferrules 2 are mutually pressed to realize the sealing of the gas circuit.
The external screw thread of the pre-pressing cap 4 is provided, and the external screw thread of the pre-pressing cap 4 is matched with the screw hole of the connecting port 104 of the two-way connecting seat 1.
The end of the pre-pressing cap 4 is provided with a high-precision second positioning column 401, and the second positioning column 401 is matched with the positioning hole 102 of the two-way connecting seat 1.
The two-way connecting seat 1, the pressing cap 3 and the pre-pressing cap 4 are all made of high-temperature-resistant and high-strength metal materials, and the metal clamping sleeve 2 is made of high-temperature-resistant and low-strength metal materials.
The outside of the two-way connecting seat 1 adopts a quadrilateral structure which is matched with a standard hexagonal wrench, and the end parts of the pressing cap 3 and the pre-pressing cap 4 both adopt standard hexagonal structures.
When the device is used, the pre-compression cap 4 is firstly taken and rotatably installed on the two-way connecting seat 1 until the rotation is limited, then a clean and harmless metal clamping sleeve 2 is taken out, the two-way connecting seat 1 is put in from the other side, the upper compression cap 3 is rotatably installed, when the compression cap 3 is perceived to be contacted with the metal clamping sleeve 2 and has resistance to rotation, a capillary chromatographic column 5 which needs to be connected is taken and passes through the capillary holes 303 of the compression cap 3 and the capillary holes 201 of the metal clamping sleeve 2 until the capillary chromatographic column 5 is contacted with the compression plane 402 of the pre-compression cap 4 and cannot go deep; at this time, the two-way connecting seat 1 is fixed by using tools such as a spanner or an accessory bracket, and meanwhile, the hexagonal spanner is used for screwing the tail hexagonal head 304 of the compression cap 3, so that the sealing conical surface 202 of the metal clamping sleeve 2 is gradually compressed and plastically deformed, and the metal clamping sleeve 2 and the capillary chromatographic column 5 are fixedly sealed; at this time, the metal cutting ferrule 2 and the pressing cap 3 which are pre-fastened and fixed with the capillary chromatographic column 5 are removed by utilizing a hexagonal wrench, the other group of metal cutting ferrule 2 and the pressing cap 3 are put into the two-way connecting seat 1 according to the previous sequence, the other capillary chromatographic column 5 which needs to be connected is inserted, and the three are pre-fastened and fixed according to the previous operation requirement; and then, removing the pre-pressing cap 4 by utilizing a hexagonal wrench, putting the first group of pre-pressing fixed metal clamping sleeves 2 and the pressing caps 3 into the two-way connecting seat 1, screwing the pressing caps 2 on any side by utilizing the hexagonal wrench, and screwing the metal clamping sleeves and the pressing caps by about 30 degrees after the rotation resistance is sensed, so that the sealing and fixing connection of the capillary chromatographic columns 5 on the two sides can be completed.
The two-way connecting seat 1 can be clamped and fixed by using an adjustable wrench, and the two-way connecting seat 1 can be fixed by fixing the fixing bolt 103 and tools such as an accessory bracket. Through the fixed mode of bolt, can need not to fix two-way connecting seat 1 alone with the hand, can realize the fastening connection of both sides capillary chromatographic column 5 promptly to the one hand, to some interior flow path complicacy, the narrow and small post incubators in space, this fixed mode can greatly improve the operation convenience of device.
According to the capillary chromatographic column connecting device, the accurate positioning of the pressing cap 3 is realized through the positioning holes 102 of the two-way connecting seat 1, so that the accurate positioning of the pressing cap 3 to the metal clamping sleeve 2 is realized, the sealing planes 203 of the metal clamping sleeves 2 on two sides are pressed tightly, the connection fixation and sealing of gas paths are realized, in the pressing process, the sealing ends of the capillary chromatographic columns 5 on two sides do not obviously move, and the connecting positions do not have gas path redundant space, so that compared with the conventional conical surface deformation line contact sealing, the dead volume in the gas paths can be obviously reduced; in addition, the structure of the two-way connecting seat 1 can be simplified by using the precise sealing plane 203 between the metal cutting sleeves 2 for compression sealing, so that the two-way connecting seat does not need to participate in a gas circuit, high-precision capillary holes are not required to be processed, a passivation process is saved, the processing cost of a connecting device can be obviously reduced, and the process qualification rate of products is improved.
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical solution of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.
Claims (9)
1. The utility model provides a run-through metal cutting ferrule capillary chromatographic column connecting device, its characterized in that, connecting device includes two-way connecting seat (1) and capillary chromatographic column (5), locating hole (102) have been seted up in two-way connecting seat (1), locating hole (102) match with the external diameter of metal cutting ferrule (2), it is connected with on two-way connecting seat (1) to rotate and presses cap (3) or sticiss cap (4) in advance, press cap (3) and metal cutting ferrule (2) in all offered with capillary chromatographic column (5) assorted central capillary hole (201) (303).
2. The connecting device for the through-type metal cutting ferrule capillary chromatographic column according to claim 1, wherein the end part of the two-way connecting seat (1) is provided with a connecting port (104), the outside of the pressure cap (3) is provided with threads, the connecting port (104) is internally provided with a threaded hole, and the external threads of the pressure cap (3) are matched with the threaded hole of the connecting port (104).
3. The through-type metal ferrule capillary chromatographic column connecting device according to claim 2, wherein a first positioning column (302) is arranged at the end part of the press cap (3), and the first positioning column (302) is precisely matched with the positioning hole (102) of the two-way connecting seat (1) in size.
4. A through-type metal ferrule capillary chromatographic column connecting device according to claim 3, characterized in that one end of the metal ferrule (2) connected with the press cap (3) is provided with a conical structure, the inner side of one end of the press cap (3) close to the connecting port (104) is provided with a pressing conical surface, and the pressing conical surface is meshed with the conical structure of the metal ferrule (2).
5. A through-type metal ferrule capillary chromatographic column connecting device according to claim 3 characterized in that one end of the metal ferrule (2) facing the two-way connecting seat (1) is arranged into a plane structure, and the plane ends of the metal ferrules (2) at two sides are mutually pressed to realize the connection and sealing of the capillary chromatographic column.
6. A through-type metal ferrule capillary chromatographic column connection device according to claim 2 characterized in that the external part of the pre-compression cap (4) is provided with threads, and the external threads of the pre-compression cap (4) are matched with the threaded holes of the connection ports (104) of the two-way connection seat (1).
7. The through-type metal ferrule capillary chromatographic column connecting device according to claim 6, wherein a second positioning column (401) is arranged in the pre-pressing cap (4), and the second positioning column (401) is precisely matched with the positioning hole (102) of the two-way connecting seat (1) in size.
8. The through-type metal ferrule capillary chromatographic column connecting device according to claim 5 is characterized in that the two-way connecting seat (1), the metal ferrule (2) and the pre-compression cap (4) are made of high-temperature-resistant and high-strength metal materials.
9. The connecting device for the through-type metal cutting ferrule capillary chromatographic column according to claim 5, wherein the tail parts of the pressing cap (3) and the pre-pressing cap (4) adopt standard hexagonal head structures, and the profile of the two-way connecting seat (1) adopts a quadrilateral structure which is matched with a standard hexagonal wrench.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320551588.4U CN220170961U (en) | 2023-03-21 | 2023-03-21 | Penetrating type metal cutting ferrule capillary chromatographic column connecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320551588.4U CN220170961U (en) | 2023-03-21 | 2023-03-21 | Penetrating type metal cutting ferrule capillary chromatographic column connecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220170961U true CN220170961U (en) | 2023-12-12 |
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ID=89058987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320551588.4U Active CN220170961U (en) | 2023-03-21 | 2023-03-21 | Penetrating type metal cutting ferrule capillary chromatographic column connecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220170961U (en) |
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2023
- 2023-03-21 CN CN202320551588.4U patent/CN220170961U/en active Active
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