CN220626288U - Elastic compression cap of capillary chromatographic column connecting device - Google Patents
Elastic compression cap of capillary chromatographic column connecting device Download PDFInfo
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- CN220626288U CN220626288U CN202322265649.3U CN202322265649U CN220626288U CN 220626288 U CN220626288 U CN 220626288U CN 202322265649 U CN202322265649 U CN 202322265649U CN 220626288 U CN220626288 U CN 220626288U
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- chromatographic column
- elastic
- elastic compression
- capillary chromatographic
- cap
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- 230000006835 compression Effects 0.000 title claims abstract description 32
- 238000007906 compression Methods 0.000 title claims abstract description 32
- 238000004587 chromatography analysis Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 abstract description 3
- 239000000047 product Substances 0.000 abstract description 3
- 239000013589 supplement Substances 0.000 abstract description 3
- 238000009434 installation Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000010963 304 stainless steel Substances 0.000 description 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- 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
- 238000005516 engineering process Methods 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Treatment Of Liquids With Adsorbents In General (AREA)
Abstract
The utility model discloses an elastic compression cap of a capillary chromatographic column connecting device, and belongs to the technical field of capillary chromatographic column connecting devices. An elastic compression cap for a capillary chromatography column connector comprising: a two-way connecting seat; the elastic pressing cap piece is detachably connected to the two-way connecting seat; the limiting cover is clamped in the elastic pressing cap piece; the utility model can be compatible with mature two-way connecting seats and nonmetallic cutting ferrule products in the market; through the elasticity to the cutting ferrule compresses tightly, when realizing the temperature cycle of higher temperature, the cutting ferrule is difficult for compressing tightly the cap spare because of expend with heat and contract with cold and leak gas, need not to supplement the elasticity in the temperature cycle process and screw up, has obviously simplified the operation degree of difficulty, can not be because of the repeated supplementary capillary chromatographic column that twists up and make the cutting ferrule thoroughly lock, after the repetitious usage, need not repeatedly cut capillary chromatographic column spare port, still can be with the harmless dismantlement of capillary chromatographic column spare and cutting ferrule, so can obviously reduce the use amount of cutting ferrule.
Description
Technical Field
The utility model relates to the technical field of capillary chromatographic column connecting devices, in particular to an elastic compression cap of a capillary chromatographic column connecting 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 the performance characteristics of various types of capillary chromatography, and the capillary chromatographic column connecting device is utilized to complete the connection combination of the capillary chromatographic columns.
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 held by the capillary chromatographic column after being deformed by pressing, so that the connection and sealing of an air path are realized, the installation is reliable, the connection can be performed for many times without damaging the end part of the capillary column, the defects are that the cutting ferrule can obviously leak air when the cutting ferrule is subjected to temperature circulation above 260 ℃, the cutting ferrule needs to be subjected to leak detection and screwing for many times, and after the cutting ferrule is screwed for many times, the cutting ferrule is easily locked with the capillary column, and only the capillary column can be cut, so that the length of the column is continuously changed;
3. the metal cutting ferrule two-way connector is tightly held by the capillary chromatographic column after being deformed through pressing the metal cutting ferrule, so that the connection and the sealing of an air path are realized, the installation is firm and reliable, the high-temperature circulation is not easy to leak air, the cutting ferrule can only be used once, the cutting ferrule needs to be reinstalled every time when being reconnected, and the use cost is high.
Disclosure of Invention
The utility model aims to solve the problems in the background art, and provides an elastic compression cap of a capillary chromatographic column connecting device.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
an elastic compression cap for a capillary chromatography column connector comprising: a two-way connecting seat; the elastic pressing cap piece is detachably connected to the two-way connecting seat; the limiting cover is clamped in the elastic pressing cap piece; a sliding pressing core which is in sliding connection with the elastic pressing cap piece; the sliding pressing core is connected with the limiting cover through an elastic piece; the cutting sleeve is connected between the sliding pressing core and the two-way connecting seat in a sliding manner; wherein, capillary chromatographic column piece runs through two-way connecting seat, cutting ferrule, slip core that presses.
Preferably, the two-way connecting seat is provided with a threaded column, and the elastic pressing cap piece is in threaded connection with the threaded column.
Preferably, the elastic pressing cap members are symmetrically provided with two groups.
Preferably, the limiting cover is provided with a central hole, the sliding pressing core comprises a large-diameter end and a small-diameter end, the large-diameter end is attached to the elastic pressing cap piece, and the small-diameter end is inserted into the central hole.
Preferably, the elastic piece is a butterfly spring piece.
Preferably, the elastic pressing cap piece is provided with a limiting clamping groove, and the limiting cover is clamped in the limiting clamping groove.
Preferably, the limit covers are symmetrically provided with two groups.
Preferably, the two-way connecting seat is provided with a conical surface matched with the clamping sleeve.
Compared with the prior art, the utility model provides the elastic compression cap of the capillary chromatographic column connecting device, which has the following beneficial effects:
the device has the advantages that the non-related parts are the same as or can be realized by adopting the prior art, and the device can be compatible with mature two-way connecting seats and nonmetallic cutting ferrule products in the market, and has low overall purchase cost and low development risk; through the elasticity to the cutting ferrule compresses tightly, when realizing the temperature cycle of higher temperature, the cutting ferrule is difficult for compressing tightly the cap spare because of expend with heat and contract with cold and leak gas, need not to supplement the elasticity in the temperature cycle process and screw up, has obviously simplified the operation degree of difficulty, can not be because of the repeated supplementary capillary chromatographic column that twists up and make the cutting ferrule thoroughly lock, after the repetitious usage, need not repeatedly cut capillary chromatographic column spare port, still can be with the harmless dismantlement of capillary chromatographic column spare and cutting ferrule, so can obviously reduce the use amount of cutting ferrule.
Drawings
FIG. 1 is a schematic view of a structure of an elastic compression cap of a capillary chromatographic column connecting device according to the present utility model;
FIG. 2 is a schematic cross-sectional view of an elastic compression cap of a capillary chromatographic column connecting device according to the present utility model;
FIG. 3 is a schematic view of the structure of the elastic compression cap of the capillary chromatographic column connecting device of the utility model shown in the part A of FIG. 2;
fig. 4 is an exploded view of an elastic compression cap of a capillary chromatography column connecting device according to the utility model.
In the figure: 1. a two-way connecting seat; 101. a threaded column; 102. a conical surface; 2. elastic pressing cap member; 201. a limit clamping groove; 3. sliding the pressing core; 301. a large diameter end; 302. a small diameter end; 4. a limit cover; 401. a central bore; 5. a cutting sleeve; 6. a capillary chromatography column; 7. an elastic member.
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.
Example 1:
referring to fig. 1-4, an elastic compression cap of a capillary chromatography column connecting device, comprising: the two-way connecting seat 1 is made of high-temperature-resistant and corrosion-resistant metal materials; the elastic pressing cap 2 is detachably connected to the two-way connecting seat 1, the elastic pressing cap 2 is made of high-temperature-resistant corrosion-resistant metal material, such as 304 stainless steel, and a knurled line screwing structure is arranged on the outer surface of the elastic pressing cap 2; the limiting cover 4 is clamped in the elastic pressing cap 2; a sliding pressing core 3 slidably connected in the elastic pressing cap 2; the sliding pressure core 3 is connected with the limit cover 4 through an elastic piece 7, and specifically, the elastic piece 7 can adopt a butterfly spring piece or a spring; the cutting ferrule 5 is connected between the sliding pressing core 3 and the two-way connecting seat 1 in a sliding manner, and the cutting ferrule 5 is made of a high-temperature-resistant nonmetallic material; wherein, capillary chromatographic column 6 runs through two-way connecting seat 1, cutting ferrule 5, the smooth dynamic pressure core 3.
The two-way connecting seat 1 is provided with a threaded column 101, the elastic pressing cap 2 is connected to the threaded column 101 in a threaded manner, and specifically, the threads on the threaded column 101 are reverse threads.
The elastic pressing cap 2 is symmetrically provided with two groups, and can limit and fix the end of the capillary chromatographic column 6.
The limiting cover 4 is provided with a central hole 401, the sliding pressing core 3 comprises a large-diameter end 301 and a small-diameter end 302, the large-diameter end 301 is attached to the elastic pressing cap 2, and the small-diameter end 302 is inserted into the central hole 401.
The elastic pressing cap 2 is provided with a limiting clamping groove 201, and the limiting cover 4 is clamped in the limiting clamping groove 201.
Referring to fig. 4, two sets of limiting caps 4 are symmetrically arranged, and a central hole 401 is arranged between the two sets of limiting caps 4, so that the limiting caps 4 can be conveniently detached and replaced when the small-diameter end 302 is not inserted into the central hole 401.
The two-way connecting seat 1 is provided with a conical surface 102 matched with the clamping sleeve 5;
when the device is assembled, the elastic piece 7 is sleeved on the small-diameter end 302, the large-diameter end 301 is inserted into the elastic pressing cap 2, the limiting cover 4 is placed into the limiting clamping groove 201 in the elastic pressing cap 2, the small-diameter end 302 is inserted into the central hole 401, and at the moment, the small-diameter end 302 can be guided, and the limiting cover 4 can be limited;
firstly, screwing the elastic compression cap 2 into a threaded column 101 of the two-way connecting seat 1, then taking the capillary chromatographic column 6 at the end A to be connected, penetrating the elastic compression cap 2 from an end opening of the elastic compression cap until the elastic compression cap 2 penetrates into an inner through hole of the clamping sleeve 5 and abuts against the end of a capillary hole of the two-way connecting seat 1, and finally, screwing the elastic compression cap 2 by hand to deform the clamping sleeve 5 under the force of the conical surface 102 and hold the capillary chromatographic column 6 tightly; and the installation connection of the capillary chromatographic column 6 at the end B and the two-way connecting seat 1 is completed in the same operation sequence, so that the connection and the sealing of the capillary chromatographic column 6 at the two sides are realized.
The utility model can be compatible with mature two-way connecting seat 1 and nonmetal clamping sleeve 5 products in the market, and has low overall purchase cost and development risk; through the elasticity to cutting ferrule 5 compresses tightly, when realizing the temperature cycle of higher temperature, cutting ferrule 5 is difficult for because expend with heat and contract with cold and leak gas, need not to supplement the tight cap 2 of elasticity compression in the temperature cycle process and screw up, has obviously simplified the operation degree of difficulty, can not thoroughly lock the capillary chromatographic column because of the repeated supplementary screw up and make cutting ferrule 5, after the repetitious usage, need not to cut capillary chromatographic column 6 port repeatedly, still can be with the harmless dismantlement of capillary chromatographic column 6 and cutting ferrule 5, so can obviously reduce cutting ferrule 5's use amount.
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 scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.
Claims (8)
1. An elastic compression cap for a capillary chromatography column connecting device, comprising:
a two-way connecting seat (1);
the elastic pressing cap piece (2) is detachably connected to the two-way connecting seat (1);
the limiting cover (4) is clamped in the elastic pressing cap piece (2);
a sliding pressure core (3) which is connected in the elastic pressing cap piece (2) in a sliding way;
wherein the sliding pressure core (3) is connected with the limit cover (4) through an elastic piece (7);
the clamping sleeve (5) is connected between the sliding pressure core (3) and the two-way connecting seat (1) in a sliding manner;
the capillary chromatographic column (6) penetrates through the two-way connecting seat (1), the clamping sleeve (5) and the sliding pressing core (3).
2. The elastic compression cap of the capillary chromatographic column connecting device according to claim 1, wherein the two-way connecting seat (1) is provided with a threaded column (101), and the elastic compression cap member (2) is in threaded connection with the threaded column (101).
3. The elastic compression cap of a capillary chromatography column connector device according to claim 1 or 2, wherein said elastic compression cap members (2) are symmetrically arranged in two groups.
4. The elastic compression cap of the capillary chromatographic column connecting device according to claim 1, wherein the limiting cover (4) is provided with a central hole (401), the sliding compression core (3) comprises a large-diameter end (301) and a small-diameter end (302), the large-diameter end (301) is attached to the elastic compression cap (2), and the small-diameter end (302) is inserted into the central hole (401).
5. The elastic compression cap of a capillary chromatography column connecting device according to claim 1 or 4, wherein said elastic member (7) is a butterfly spring piece.
6. The elastic compression cap of the capillary chromatographic column connecting device according to claim 1, wherein the elastic compression cap piece (2) is provided with a limit clamping groove (201), and the limit cover (4) is clamped in the limit clamping groove (201).
7. The elastic compression cap of the capillary chromatography column connecting device according to claim 6, wherein said limit cover (4) is symmetrically provided with two groups.
8. The elastic compression cap of the capillary chromatographic column connecting device according to claim 1, characterized in that the two-way connecting seat (1) is provided with a conical surface (102) matched with the clamping sleeve (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322265649.3U CN220626288U (en) | 2023-08-23 | 2023-08-23 | Elastic compression cap of capillary chromatographic column connecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322265649.3U CN220626288U (en) | 2023-08-23 | 2023-08-23 | Elastic compression cap of capillary chromatographic column connecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220626288U true CN220626288U (en) | 2024-03-19 |
Family
ID=90218746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322265649.3U Active CN220626288U (en) | 2023-08-23 | 2023-08-23 | Elastic compression cap of capillary chromatographic column connecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220626288U (en) |
-
2023
- 2023-08-23 CN CN202322265649.3U patent/CN220626288U/en active Active
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