CN109283271B - Chromatographic column sampling system - Google Patents
Chromatographic column sampling system Download PDFInfo
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- CN109283271B CN109283271B CN201811199045.0A CN201811199045A CN109283271B CN 109283271 B CN109283271 B CN 109283271B CN 201811199045 A CN201811199045 A CN 201811199045A CN 109283271 B CN109283271 B CN 109283271B
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- sample
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- 238000005070 sampling Methods 0.000 title claims description 14
- 238000002347 injection Methods 0.000 claims abstract description 19
- 239000007924 injection Substances 0.000 claims abstract description 19
- 238000007789 sealing Methods 0.000 claims description 30
- 238000004587 chromatography analysis Methods 0.000 claims description 22
- 230000000903 blocking effect Effects 0.000 claims description 12
- 230000007306 turnover Effects 0.000 claims description 12
- 238000005259 measurement Methods 0.000 claims description 6
- 210000001503 joint Anatomy 0.000 claims description 5
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 238000004458 analytical method Methods 0.000 abstract description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 15
- 229910002804 graphite Inorganic materials 0.000 description 15
- 239000010439 graphite Substances 0.000 description 15
- 239000012159 carrier gas Substances 0.000 description 12
- 239000007789 gas Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 239000011491 glass wool Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/16—Injection
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Treatment Of Liquids With Adsorbents In General (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention provides a chromatographic column sample injection system which comprises a sample injector, a chromatographic column tube and a connecting unit, wherein the connecting unit comprises a first connecting piece and a second connecting piece, the first connecting piece is arranged at the outlet end of the sample injector, the second connecting piece is arranged at the sample injection end of the chromatographic column tube, the first connecting piece is connected with the second connecting piece in a clamping mode, and the chromatographic column tube is communicated with the sample injector through the first connecting piece and the second connecting piece. In the prior art, when the chromatographic column tube is connected with the sample injector, a section of liner tube is sleeved at the column head of the chromatographic column tube and then a screw cap is sleeved, and the chromatographic column tube is easy to bend when being detached or connected with the sample injector, so that the problem that analysis sample gas cannot enter the chromatographic column tube is solved.
Description
Technical Field
The invention relates to the field of manufacturing of analysis equipment, in particular to a chromatographic column sample injection system.
Background
The chromatographic column is a core element of a gas chromatograph, and has substances with separation function inside. The prior chromatographic column is filled with a section of glass wool only in the column head, and the expansion effect of the glass wool is utilized to contact with the inner wall of the chromatographic column and generate friction force, thereby fixing the glass wool to block the chromatographic packing. However, the chromatograph element is easily polluted by splashing of the filler in the use process to damage the chromatographic column, and particularly, when the chromatograph element is used, people with unskilled operation forget to remove the carrier gas pressure easily to directly pull out the chromatographic column from the sample injector, and at the moment, the pressure in the chromatographic column can spray the filler in the column, so that laboratory accidents are caused.
When the chromatographic column is connected with the sample injector, a section of liner tube is sleeved at the column head, then a screw cap is sleeved, a graphite pad is placed in the screw cap, and then the screw cap is screwed to be connected with the chromatograph. Different types of chromatographic columns are required for different samples during chromatographic analysis, the chromatographic columns are required to be replaced frequently in actual operation, and the graphite pads are crushed frequently by using a sealing connection mode of nuts and graphite pads. And meanwhile, the chromatographic column is easy to bend when being detached or connected with the sample injector, so that analysis sample gas cannot enter the chromatographic column.
In summary, the current chromatographic column often causes the problem of laboratory accidents caused by filler ejection when the carrier gas pressure is removed, and the chromatographic column is easily bent when the chromatographic column is detached or connected with a sample injector.
Disclosure of Invention
The invention aims to overcome the defects of the technology, and provides a chromatographic column sample injection system, which solves the problem that in the prior art, when the pressure of carrier gas is removed, a chromatographic column tube often causes filling material to be sprayed out to cause laboratory accidents, and simultaneously, the chromatographic column tube is easy to bend when being detached or connected with a sample injector.
In order to solve the problems, the invention provides a chromatographic column sample injection system, which comprises a sample injector, a chromatographic column tube and a connecting unit, wherein the connecting unit comprises a first connecting piece and a second connecting piece, the first connecting piece is arranged at the outlet end of the sample injector, the second connecting piece is arranged at the sample injection end of the chromatographic column tube, the first connecting piece is connected with the second connecting piece in a clamping mode, and the chromatographic column tube is communicated with the sample injector through the first connecting piece and the second connecting piece.
Further, the first connecting piece is a sealing ring, and the second connecting piece is a flange which is in butt joint with the sealing ring; or the second connecting piece is a sealing ring, and the first connecting piece is a flange which is in butt joint with the sealing ring.
Further, the first connecting piece is a main flange plate provided with a clamping hole; the second connecting piece is a secondary flange, and the secondary flange is provided with a clamping piece matched with the clamping hole.
Further, the first connecting piece is a clamping block provided with a first magnetic attraction layer, the second connecting piece is a chuck provided with a second magnetic attraction layer, and the first magnetic attraction layer and the second magnetic attraction layer can attract each other magnetically.
Further, still include the pressure release unit, the pressure release unit includes pressure release part and pressure release mouth, and the pressure release mouth sets up on the pipe wall of chromatographic column, and the pressure release part passes through pressure release mouth and chromatographic column intercommunication, and the pressure release part can dismantle with the chromatographic column and be connected.
Further, the pressure relief member includes a pressure relief valve or a pressure relief plate.
Further, a sample inlet is arranged at the sample inlet end of the chromatographic column tube, a blocking spring piece is also arranged at the position, close to the sample inlet, of the inner cavity of the chromatographic column tube, and a trigger button connected with the blocking spring piece is arranged on the outer wall of the chromatographic column tube; under the triggering state, the blocking elastic sheet is positioned above the pressure relief opening and blocks the sample inlet.
Further, on the side wall of the chromatography column, a dimension measuring unit is provided along the axial direction of the chromatography column, the dimension measuring unit including:
the size scale adhesion strip is in adhesive connection with the outer wall of the chromatographic column tube.
Further, the size measurement unit comprises a telescopic scale and a turnover piece, and the telescopic scale is connected with the chromatographic column tube through the turnover piece; the turnover piece comprises a hinge or a rotary connecting groove and a rotary shaft.
Further, the dimension measuring unit comprises a laser measurer, wherein the laser measurer is used for measuring the length distance of the chromatographic column tube inserted into the sample injector along the length extending direction.
In order that the above-recited features of the present invention can be understood in detail, a preferred embodiment of the invention is illustrated in the accompanying drawings.
The beneficial effects of the invention are as follows:
the invention provides a chromatographic column sample injection system which comprises a sample injector, a chromatographic column tube and a connecting unit, wherein the connecting unit comprises a first connecting piece and a second connecting piece, the first connecting piece is arranged at the outlet end of the sample injector, the second connecting piece is arranged at the sample injection end of the chromatographic column tube, the first connecting piece is connected with the second connecting piece in a clamping mode, and the chromatographic column tube is communicated with the sample injector through the first connecting piece and the second connecting piece. In the prior art, when the chromatographic column is connected with a sample injector, a section of liner tube is sleeved at the column head of the chromatographic column and then a screw cap is sleeved, a graphite pad is placed in the screw cap, then the screw cap is screwed to be connected with a chromatograph, different types of chromatographic column are required for different samples during chromatographic analysis, the chromatographic column is required to be replaced frequently in actual operation, the graphite pad is crushed frequently in a sealing connection mode of the screw cap and the graphite pad, and the chromatographic column is easy to bend when being detached or connected with the sample injector, so that analysis sample gas cannot enter the chromatographic column.
Drawings
FIG. 1 is a schematic diagram of a chromatographic column sample injection system according to an embodiment of the present invention;
fig. 2 is a schematic diagram of another structure of a chromatographic column sample injection system according to an embodiment of the present invention.
Reference numerals
1: a sample injector; 11: a sample introduction end; 111: a sample inlet; 2: a chromatographic column tube; 3: a connection unit; 31: a first connector; 32: a second connector; 4: a pressure relief unit; 41: a pressure relief member; 42: a pressure relief port; 5: a size measurement unit; 51: a size scale adhesive strip; 52: a telescopic ruler; 53: and a turnover piece.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, the terms "upper," "inner," "bottom," and the like indicate an orientation or a positional relationship based on the orientation or the positional relationship shown in the drawings, or the orientation or the positional relationship conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus the terms "first," "second," and the like are merely used to distinguish the description and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The invention will be described in further detail below with reference to the drawings by means of specific embodiments.
In order to solve the foregoing problems, please refer to fig. 1-2, the present embodiment provides a chromatographic column sampling system, which comprises a sample injector 1, a chromatographic column tube 2 and a connection unit 3, wherein the connection unit 3 comprises a first connection member 31 and a second connection member 32, the first connection member 31 is disposed at an outlet end of the sample injector 1, the second connection member 32 is disposed at a sample injection end 11 of the chromatographic column tube 2, the first connection member 31 and the second connection member 32 are in snap-fit connection, and the chromatographic column tube 2 is communicated with the sample injector 1 through the first connection member 31 and the second connection member 32.
With continued reference to fig. 1 and fig. 2, in order to avoid the problem that the chromatographic column tube 2 is easily bent when being detached or connected with the sample injector 1, the chromatographic column sample injection system provided in this embodiment includes a connection unit 3, and the chromatographic column tube 2 is connected with the sample injector 1 through the connection unit 3. Specifically, chromatographic column 2 is connected with sample injector 1 through first connecting piece 31 and second connecting piece 32, conveniently dismantle, can effectively avoid among the prior art chromatographic column 2 and sample injector 1 when being connected, can embolia one section bushing pipe and then sheathe in the nut in chromatographic column 2's column cap department, put into the graphite pad in the nut, then screw up the nut and be connected with the chromatograph, can need the chromatographic column of different models to different samples when carrying out chromatographic analysis, need often change chromatographic column in actual operation, use the sealed connection mode of nut plus graphite pad often can crush the graphite pad, and the column cap of chromatographic column is very easily bent when dismantling or being connected with the sample injector, thereby lead to the problem that analysis sample gas can't get into the chromatographic column.
Referring to fig. 1, in one connection manner of the present embodiment, the first connecting member 31 is a sealing ring, and the second connecting member 32 is a flange abutting against the sealing ring; alternatively, the second connecting member 32 is a sealing ring, and the first connecting member 31 is a flange abutting against the sealing ring.
In actual operation, the chromatographic column 2 needs to be replaced frequently, the graphite pad is crushed frequently by using a sealing connection mode of a nut and a graphite pad, and the chromatographic column 2 is easy to bend when being detached or connected with the sample injector 1, so that the problem that analysis sample gas cannot enter the chromatographic column 2 is caused, and one structure of the connecting unit 3 in the embodiment can be a sealing ring butt joint piece.
Referring to fig. 1, in particular, the seal ring interfacing comprises a seal ring disposed on the injector 1 and connected to the chromatographic column tube 2; and the flange is arranged on the chromatographic column tube 2 and is in butt joint with the sealing ring, when the chromatographic column tube 2 is connected with the sample injector 1, the flange which is outwards protruded can be arranged at one end of the chromatographic column tube 2 connected with the sample injector 1, so that the sealing ring at the joint of the chromatographic column tube 2 on the sample injector 1 is extruded, the clamping connection is realized, and the problem that the chromatographic column tube 2 is easy to bend when the chromatographic column tube 2 is detached or connected with the sample injector 1 is avoided.
Referring to fig. 2, in another connection manner of the present embodiment, the first connecting member 31 is a main flange with a clamping hole; the second connecting piece 32 is a secondary flange, and a clamping piece matched with the clamping hole is arranged on the secondary flange. The first connecting piece 31 is including setting up the main ring flange of joint hole that is equipped with in the junction of injector 1 and chromatographic column tube 2, and the second connecting piece 32 is for setting up the secondary ring flange with main ring flange complex in the junction of chromatographic column tube 2 and injector 1, is equipped with on the secondary ring flange with joint hole assorted joint piece. Through the joint of main ring flange and secondary ring flange, saved chromatographic column 2 among the prior art when being connected with injector 1, embolia one section bushing pipe and then sheathes the nut in chromatographic column 2 column cap department, put into the graphite pad in the nut, then screw up the operation that the nut was connected with the chromatograph to the chromatographic column 2 is very easily bent when dismantling or being connected with injector 1 has been avoided.
In still another connection mode of the present embodiment (not shown in the schematic diagram), the first connecting piece is a fixture block provided with a first magnetic attraction layer, the second connecting piece is a chuck provided with a second magnetic attraction layer, and the first magnetic attraction layer and the second magnetic attraction layer can attract each other magnetically. The clamping block of the first magnetic attraction layer and the chuck with the magnetism opposite to that of the first magnetic attraction layer are clamped through the first magnetic attraction layer and the second magnetic attraction layer, so that the problem that the chromatographic column tube is easy to bend when the chromatographic column tube is detached or connected with the sample injector is avoided.
It should be understood that the connection unit may be further provided with a sealing member (not shown in the drawings) in this embodiment, and the sealing member includes a sealing ring or a sealing gasket. In order to avoid carrier gas leakage at the connection between the chromatographic column 2 and the injector 1, so as to affect the use effect of the chromatographic column 2, a sealing element may be disposed at the connection between the chromatographic column 2 and the injector 1, it should be understood that the sealing element may be a sealing ring or a sealing gasket, or may be a sealing member of other structure or material, so long as the carrier gas can be prevented from leaking at the connection between the chromatographic column 2 and the injector 1, for example, may be an NBR70/FKM sealing ring, and the specific structure and material of the sealing element are not limited in this embodiment.
Referring to fig. 1-2, in this embodiment, the chromatographic column sample injection system further includes a pressure relief unit 4, the pressure relief unit 4 includes a pressure relief component 41 and a pressure relief opening 42, the pressure relief opening 42 is disposed on a wall of the chromatographic column tube 2, the pressure relief component 41 is communicated with the chromatographic column tube 2 through the pressure relief opening 42, and the pressure relief component 41 is detachably connected with the chromatographic column tube 2. The pressure release part 41 is used for removing the carrier gas pressure in the chromatographic column tube 2, and is usually used for removing the carrier gas pressure so as to avoid laboratory accidents caused by the countercurrent carrier gas.
In addition, when the pressure relief component 41 disposed on the wall of the chromatographic column tube 2 needs to be detached, since the pressure relief component 41 is detachably disposed on the wall of the chromatographic column tube 2, the detachment can be facilitated, and the actual requirement is satisfied, and it is to be understood that the specific pressure relief component 41 may be in threaded connection, or may be a clamping connection between a flange and a limiting groove, and the specific connection mode may not be limited to the connection mode given in the embodiment, so long as the detachable connection is satisfied, and the embodiment is not particularly limited thereto.
In this embodiment, the pressure relief member 41 includes a pressure relief valve as shown in fig. 1-2, and may be a pressure relief plate (not shown). The pressure release part 41 automatically or manually selectively opens the pressure release operation, so that the carrier gas in the chromatographic column tube 2 is discharged at a preset speed, and laboratory accidents caused by the countercurrent carrier gas when the carrier gas pressure is discharged are prevented. Specifically, the pressure relief component 41 may be a pressure relief valve and a pressure relief plate, specifically may be an a21F/H/Y pressure relief valve, and the specific model and structure are selected according to actual needs, which is not limited in this embodiment.
With continued reference to fig. 1 and 2, in this embodiment, a sample inlet 111 is provided at a sample inlet 11 of the chromatographic column tube 2, a blocking spring (not shown in the figure) is further provided at a position of an inner cavity of the chromatographic column tube 2 near the sample inlet 111, and a trigger button connected with the blocking spring is provided on an outer wall of the chromatographic column tube 2; in the triggered state, the blocking spring is located above the pressure relief port 42 and blocks the sample inlet 111. When the connection between the chromatographic column 2 and the sample injector 1 needs to be disassembled at first, and then the pressure release part 41 is opened, a blocking spring piece (not shown in the figure) can be further arranged at the position, close to the sample inlet 111, of the inner cavity of the chromatographic column 2, a trigger button connected with the blocking spring piece is arranged on the outer wall of the chromatographic column 2, and the blocking spring piece is opened to be positioned above the pressure release opening 42 and block the sample inlet 111 through triggering, so that the blocking spring piece keeps the air pressure in the chromatographic column 2 in a stable state, and the filling liquid in the chromatographic column 2 is prevented from splashing; after the sample injector 1 and the chromatographic column tube 2 are disassembled, the pressure relief component is opened, and the carrier gas pressure in the chromatographic column tube 2 is removed.
Referring to fig. 1 and 2, in this embodiment, a dimension measuring unit 5 is disposed on a sidewall of the chromatographic column 2 along an axial direction of the chromatographic column 2, and when the chromatographic column 2 is connected to the sample injector 1 during chromatographic analysis, a length distance of the chromatographic column 2 inserted into the sample injector 1 is generally required to be 4cm, and in order to ensure that the length distance of the chromatographic column 2 inserted into the sample injector 1 meets chromatographic analysis requirements, the dimension measuring unit 5 may be disposed on the sidewall of the chromatographic column 2 along the axial direction of the chromatographic column 2 to measure the length distance of the chromatographic column 2 inserted into the sample injector 1.
Referring to fig. 1, in one of the dimension measuring units 5 of the present embodiment, the dimension measuring unit 5 may be a dimension scale adhesion strip 51, and the dimension scale adhesion strip 51 is adhesively connected to the outer wall of the chromatographic column tube 2. For measuring the length of the chromatographic column 2 inserted into the sample injector 1.
The other dimension measuring unit 5 of the present embodiment, the dimension measuring unit 5 includes a telescopic scale 52 and a turnover member 53, the telescopic scale 52 is connected with the chromatographic column tube 2 through the turnover member 53; the flip 53 includes a hinge or the flip 53 may be a rotating hinge and shaft as shown in fig. 2.
Specifically, in practical use, in order to avoid blocking or obstructing the use of the chromatographic column 2 when the telescopic scale 52 is disposed on one side of the chromatographic column 2, the telescopic scale 52 may be connected to the chromatographic column 2 through the overturning piece 53, and when the chromatographic column 2 is connected to the sample injector 1, the overturning piece 53 is configured to enable the projection of the telescopic scale 52 and the chromatographic column 2 in the length extending direction to coincide, that is, the telescopic scale 52 is disposed parallel to the chromatographic column 2, so as to measure the length distance of the chromatographic column 2 inserted into the sample injector 1 through the telescopic scale 52; when the connection is completed, the telescopic scale 52 can be arranged to be perpendicular to the length extending direction of the chromatographic column 2 by the turnover piece 53, that is, the telescopic scale 52 is arranged to be perpendicular to the chromatographic column 2.
It should be understood that the dimension measuring unit 5 may not be completely perpendicular to the chromatographic column 2, i.e. the dimension measuring unit 5 may be folded and retracted on one side of the chromatographic column 2, so long as the use of the chromatographic column 2 is not affected, and the angle formed between the dimension measuring unit 5 and the chromatographic column 2 by the overturning member 53 may be optionally selected, which is not specifically limited in this embodiment.
In this embodiment, the turnover member 53 includes a hinge, or a rotation link and a rotation shaft. Referring to fig. 2, the turning piece 53 may be a hinge, that is, the size measuring unit 5 is disposed on one side of the wall of the chromatographic column 2 by rotating the hinge, and when the chromatographic column 2 is connected to the sample injector 1, the hinge is used to set the projection of the size measuring unit 5 and the chromatographic column 2 in the length extending direction to coincide, that is, the size measuring unit 5 is disposed parallel to the length extending direction of the chromatographic column 2, so as to measure the length distance of the chromatographic column 2 inserted into the sample injector 1 by the size measuring unit 5; after the connection is completed, the dimension measuring unit 5 and the length extension direction of the chromatographic column tube 2 can be set to be perpendicular to the projection of the length extension direction of the dimension measuring unit 5 and the length extension direction of the chromatographic column tube 2 respectively through hinges, that is, the dimension measuring unit 5 and the length extension direction of the chromatographic column tube 2 are set to be perpendicular to each other.
In addition, in order to avoid the problem that the telescopic staff 52 is not easy to turn downwards when being folded downwards through the turnover piece 53 after being measured, the telescopic staff 52 can be retracted to a shorter length when turning downwards, so that the telescopic staff 52 is convenient to turn and retract; when measurement is required, the telescopic scale 52 is pulled out for a certain length to measure the length of the chromatographic column 2 inserted into the sample injector 1.
In still another dimension measuring unit (not shown) of the present embodiment, the dimension measuring unit includes a laser measurer for measuring a length distance of the chromatographic column 2 inserted into the sample injector 1 along the length extending direction. The laser measuring device is used for measuring the length distance of the chromatographic column tube 2 inserted into the sample injector 1In the actual operation process of chromatographic analysis in the prior art, the depth that the chromatographic column tube is inserted into the sample injector 1 by using the ruler is omitted, then the chromatographic column tube is pinched by hands to be positioned for operation, and the operation is very inconvenient, meanwhile, the position is often inaccurate due to the fact that the outer wall of the chromatographic column tube 2 is smooth during insertion, the problem can be effectively solved by the laser measurer, and the depth that the chromatographic column tube 2 is inserted into the sample injector can be judged by contrasting the laser measurer during operation. The laser measurer is a common size measuring unit provided by the embodiment, and can be specifically of the model Go-! SCAN 3D TM Of course, the dimension measuring unit may be not limited to the two structures described in the present embodiment, and may be selected as appropriate, and the present embodiment is not limited thereto.
The chromatographic column sampling system that this embodiment provided, including injector, chromatographic column pipe and connecting element, connecting element includes first connecting piece and second connecting piece, and first connecting piece sets up the exit end at the injector, and the second connecting piece sets up the sampling end at the chromatographic column pipe, and first connecting piece and second connecting piece buckle are connected, and the chromatographic column pipe communicates through first connecting piece and second connecting piece with the injector. In the prior art, when the chromatographic column is connected with the sample injector, a section of liner tube is sleeved at the column head of the chromatographic column and then a screw cap is sleeved, a graphite pad is placed in the screw cap, then the screw cap is screwed to be connected with the chromatograph, different types of chromatographic column are required for different samples in chromatographic analysis, the chromatographic column is required to be replaced frequently in actual operation, the graphite pad is crushed frequently in a sealing connection mode of the screw cap and the graphite pad, and the chromatographic column is easy to bend when being detached or connected with the sample injector, so that the problem that analysis sample gas cannot enter the chromatographic column is caused. The chromatographic column sampling system provided by the embodiment is connected with the second connecting piece through the first connecting piece, so that the problem that the chromatographic column tube is easy to bend during disassembly and inconvenient to disassemble is avoided.
In summary, the above-described embodiments of the present invention are provided merely to illustrate the principles of the present invention and its efficacy, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (9)
1. The chromatographic column sample injection system is characterized by comprising a sample injector, a chromatographic column tube and a connecting unit, wherein the connecting unit comprises a first connecting piece and a second connecting piece, the first connecting piece is arranged at the outlet end of the sample injector, the second connecting piece is arranged at the sample injection end of the chromatographic column tube, the first connecting piece is connected with the second connecting piece in a clamping mode, and the chromatographic column tube is communicated with the sample injector through the first connecting piece and the second connecting piece; and, in addition, the processing unit,
the chromatographic column sample injection system further comprises a pressure relief unit, the pressure relief unit comprises a pressure relief part and a pressure relief opening, the pressure relief opening is formed in the wall of the chromatographic column tube, a sample injection port is formed in the sample injection end of the chromatographic column tube, a separation elastic sheet is further arranged at the position, close to the sample injection port, of the inner cavity of the chromatographic column tube, and a trigger button connected with the separation elastic sheet is arranged on the outer wall of the chromatographic column tube; and in a triggering state, the blocking elastic sheet is positioned above the pressure relief opening and blocks the sample inlet.
2. The chromatography column sampling system of claim 1, wherein the first connector is a sealing ring and the second connector is a flange that interfaces with the sealing ring; or, the second connecting piece is a sealing ring, and the first connecting piece is a flange which is in butt joint with the sealing ring.
3. The chromatography column sampling system of claim 1, wherein the first connector is a main flange plate provided with a clamping hole; the second connecting piece is a secondary flange plate, and the secondary flange plate is provided with a clamping piece matched with the clamping hole.
4. The chromatography column sampling system of claim 1, wherein the first connector is a fixture block provided with a first magnetic layer, the second connector is a chuck provided with a second magnetic layer, and the first magnetic layer and the second magnetic layer are magnetically attracted.
5. The chromatography column sampling system of any one of claims 1-4, wherein the pressure relief member is in communication with the chromatography column tube through the pressure relief port and the pressure relief member is detachably connected to the chromatography column tube.
6. The chromatography column sampling system of claim 1, wherein the pressure relief component comprises a pressure relief valve or a pressure relief plate.
7. The chromatography column sampling system according to claim 1, wherein a dimension measuring unit is provided on a side wall of the chromatography column tube along an axial direction of the chromatography column tube.
8. The chromatography column sampling system of claim 7, wherein the size measurement unit comprises: a size scale adhesive strip, which is in adhesive connection with the outer wall of the chromatographic column tube; or the size measurement unit comprises a telescopic scale and a turnover piece, and the telescopic scale is connected with the chromatographic column tube through the turnover piece; the turnover piece comprises a hinge or a rotary connecting groove and a rotary shaft.
9. The chromatography column sampling system of claim 7, wherein the size measurement unit comprises a laser gauge for measuring a length distance of the chromatography column tube inserted into the sample injector along a length extension direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811199045.0A CN109283271B (en) | 2018-10-15 | 2018-10-15 | Chromatographic column sampling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811199045.0A CN109283271B (en) | 2018-10-15 | 2018-10-15 | Chromatographic column sampling system |
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