CN218726976U - Capillary column fixed knot constructs and connection assembly on gas chromatograph sampling valve - Google Patents
Capillary column fixed knot constructs and connection assembly on gas chromatograph sampling valve Download PDFInfo
- Publication number
- CN218726976U CN218726976U CN202222600590.4U CN202222600590U CN218726976U CN 218726976 U CN218726976 U CN 218726976U CN 202222600590 U CN202222600590 U CN 202222600590U CN 218726976 U CN218726976 U CN 218726976U
- Authority
- CN
- China
- Prior art keywords
- sleeve
- capillary column
- valve
- injection valve
- screw
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model is suitable for the technical field of detection, and provides a capillary column fixing structure and a connecting assembly on a sample injection valve of a gas chromatograph, which comprises a capillary column, a screw, a sleeve and a solid plug; the capillary column penetrates through the solid plug and is arranged in the sleeve in a penetrating mode, the sleeve is arranged in the screw, the clamping sleeve is clamped at the end, close to the sampling valve head, of the sleeve, the sleeve is tightened and hooped under the action of the clamping sleeve, and the capillary column is connected into the sampling valve. The capillary column fixing structure on the sample injection valve of the gas chromatograph can control the depth of the capillary column inserted into the sample injection valve joint during assembly, and particularly control the capillary column with a thinner outer diameter. The structure can reduce the accidental abrasion of the rotor of the sample injection valve, and the hidden danger that the diaphragm of the diaphragm sample injection valve is plugged by the capillary column to leak gas, and can also prevent the graphite sealing gasket from being extruded in the interface of the sample injection valve, so that the graphite sealing gasket is difficult to take out, the capillary column is difficult to reinsert, and the problems of inconvenient maintenance and replacement are solved.
Description
Technical Field
The utility model belongs to the technical field of detect, especially, relate to a capillary column fixed knot constructs and connection assembly on gas chromatograph sampling valve.
Background
When a portable methane non-methane total hydrocarbon and benzene series analyzer is used for gas chromatography, a capillary column is required to be assembled on a sample injection valve to complete analysis of total hydrocarbons, methane and benzene series, and the capillary column is used for quantitative and qualitative analysis of a sample. There are potential hazards when assembling the capillary column. Part of capillary columns with thinner outer diameters are smaller than the drift diameter of the multi-way sampling valve, and the depth of the capillary columns inserted into the sampling valve joint is difficult to control during assembly; when the insertion depth is too deep, the rotor of the rotor valve can be worn, or the diaphragm of the diaphragm valve is inserted and broken, so that various abnormalities of spectrograms of the gas chromatograph can be caused, and the gas chromatograph cannot be normally used. In addition, the sealing gasket for fixing the capillary column of the sample injection valve adopts a graphite sealing gasket, the graphite gasket deforms to reach the position for sealing the capillary column and the clamping sleeve after being extruded by the screw, the position of the capillary column cannot be limited, the graphite gasket is disassembled after being extruded, the graphite gasket is extruded at the interface of the sample injection valve, the graphite gasket is not easy to take out, and the maintenance and the replacement are inconvenient.
SUMMERY OF THE UTILITY MODEL
The utility model provides a capillary column fixed knot constructs and connection assembly on gas chromatograph sampling valve, when aiming at solving the assembly capillary column on the sampling valve, capillary column uncontrollable inserts length, leads to the unexpected wearing and tearing of rotor of sampling valve, has increased cost of maintenance's problem.
The utility model provides a capillary column fixed knot constructs on gas chromatograph injection valve which characterized in that: comprises a capillary column, a screw, a sleeve, a clamping sleeve and a solid plug; the screw is the cavity screw, solid end cap center trompil, the cutting ferrule is the round platform form:
the capillary column penetrates through the solid plug, the capillary column is arranged in a sleeve in a penetrating mode, the sleeve is arranged in a screw in a penetrating mode, and the clamping sleeve is arranged at one end, close to the first valve port channel, of the sleeve.
On the basis of the technical scheme, the sleeve is made of a PEEK material with high tensile modulus.
On the basis of the technical scheme, the screw and the sleeve are in clearance fit or transition fit.
A connection assembly on a sample injection valve of a gas chromatograph comprises a capillary column fixing structure and the sample injection valve on the sample injection valve of the gas chromatograph, wherein the sample injection valve is provided with a first valve port channel and a second valve port channel, a stop surface is formed at the joint of the first valve port channel and the second valve port channel, and the diameter of the first valve port channel is smaller than that of a sleeve; the sleeve is tightly propped against the stop surface, the end part of the capillary column is flush with the end part of the sleeve, the screw tightly props against the clamping sleeve, the clamping sleeve tightly hoops the sleeve, and the sleeve tightly hoops the capillary column.
On the basis of the technical scheme, the solid plug is positioned at the top end of the sleeve.
Advantageous effects
Compared with the prior art, the beneficial effects of the utility model are that: on one hand, when the capillary column is assembled on the sample injection valve, the depth of the capillary column inserted into the joint of the sample injection valve can be controlled, and particularly, the capillary column with a thinner outer diameter can reduce the accidental abrasion of a rotor of the sample injection valve and the hidden danger that a diaphragm of the diaphragm sample injection valve is broken by the capillary column to leak gas; on the other hand, the combination of the screw, the sleeve and the clamping sleeve can be easily taken out from the sample injection valve interface when the sleeve is disassembled, so that the replacement is convenient, the maintenance cost can be reduced, and the production reliability and the use stability of the instrument can be improved.
Drawings
In order to clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below. It is obvious that the drawing in the following description is only an embodiment of the invention, and that for a person skilled in the art, other embodiments can be derived from the drawing provided without inventive effort.
FIG. 1: the structure of the utility model is shown schematically;
FIG. 2: an enlarged view at a in fig. 1.
Detailed Description
The invention is further described with reference to the following figures and examples:
reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
As shown in fig. 1 and fig. 2, the utility model provides a technical solution: the utility model provides a capillary column fixed knot constructs on gas chromatograph injection valve which characterized in that: the capillary column comprises a capillary column 1, a screw 2, a sleeve 5, a clamping sleeve 6 and a solid plug 7; the screw 2 is a hollow screw, the center of the solid plug 7 is provided with a hole, and the cutting sleeve 6 is in a round table shape:
the capillary column 1 penetrates through the solid plug 7, the capillary column 1 is arranged in the sleeve 5 in a penetrating mode, the sleeve 5 is arranged in the screw 2 in a penetrating mode, and the clamping sleeve 6 is arranged at one end, close to the first valve port channel 8, of the sleeve 5.
Preferably, the sleeve 5 is made of PEEK material with high tensile modulus, and the screw 2 and the sleeve 5 are in clearance fit or transition fit. The sleeve 5 provided with the capillary column 1 is sleeved into the screw 2, the screw 2 is in clearance fit or transition fit with the sleeve 5, the sleeve 5 made of PEEK material is tightly hooped by the clamping sleeve 6 and tightened under the extrusion of the clamping sleeve 6, and the capillary column 1 is clamped without damage to the capillary column 1 made of the PEEK material.
A connection assembly on a sample valve of a gas chromatograph comprises a capillary column fixing structure and the sample valve on the sample valve of the gas chromatograph, wherein the sample valve is provided with a first valve port channel 8 and a second valve port channel 10, a stop surface 9 is formed at the joint of the first valve port channel 8 and the second valve port channel 10, and the diameter of the first valve port channel 8 is smaller than that of a sleeve 5; the sleeve 5 abuts against the stop surface 9, the end of the capillary column 1 is flush with the end of the sleeve 5, the screw 2 abuts against the clamping sleeve 6, the clamping sleeve 6 clamps the sleeve 5, the sleeve 5 clamps the capillary column 1, and the solid plug 7 is located at the top end of the sleeve 5.
When the capillary column is used, the capillary column 1 penetrates through the solid plug 7 into the sleeve 5 until the end of the capillary column 1 is flush with one end of the sleeve 5, the solid plug 7 is positioned at the other end of the sleeve 5, the sleeve 5 and the capillary column 1 are penetrated into the central hole of the screw 2 until the end of the sleeve 5 abuts against the stop surface 9, so that the insertion depth of the sleeve 5 is limited, at the moment, if relative displacement is generated between the capillary column 1 and the sleeve, the capillary column 1 is adjusted to enable the solid plug 7 on the capillary column to be tightly attached to the end of the sleeve 5, at the moment, the end of the capillary column 1 is flush with one end of the sleeve 5, the screw 2 is screwed, the sleeve 6 is pressed by the screw 2, the sleeve 6 contracts in inner diameter while the sleeve 6 is displaced, and finally the sleeve 5 is tightened, and meanwhile, the sleeve 5 is compressed to tightly clamp the capillary column 1, so that the sleeve 1, the sleeve 5 and the sleeve 6 are fixed together, so that the insertion depth of the capillary column 1 can be limited.
The structure can fix the insertion depth of the capillary column, and when the capillary column is inserted into the first valve port channel 8 of the sampling valve head, the rotor 4 cannot be damaged due to overlong insertion length.
The present invention has been described above by way of example, but the present invention is not limited to the above-mentioned embodiments, and any modification or variation based on the present invention is within the scope of the present invention.
Claims (5)
1. The utility model provides a capillary column fixed knot constructs on gas chromatograph injection valve which characterized in that: comprises a capillary column (1), a screw (2), a sleeve (5), a cutting sleeve (6) and a solid plug (7); screw (2) are hollow screw, solid end cap (7) center trompil, cutting ferrule (6) are the round platform form:
the capillary column (1) penetrates through the solid plug (7), the capillary column (1) is arranged in the sleeve (5) in a penetrating mode, the sleeve (5) is arranged in the screw (2) in a penetrating mode, and the clamping sleeve (6) is installed at one end, close to the first valve port channel (8), of the sleeve (5).
2. The fixing structure of the capillary column on the sample injection valve of the gas chromatograph according to claim 1, characterized in that: the sleeve (5) uses a PEEK material having a high tensile modulus.
3. The fixing structure of the capillary column on the sample injection valve of the gas chromatograph according to claim 1, characterized in that: the screw (2) and the sleeve (5) are in clearance fit or transition fit.
4. The utility model provides a connection assembly on gas chromatograph injection valve which characterized in that: comprises the capillary column fixing structure on the sample valve of the gas chromatograph and the sample valve, the sample valve is provided with a first valve port channel (8) and a second valve port channel (10), the joint of the first valve port channel (8) and the second valve port channel (10) forms a stop surface (9), and the diameter of the first valve port channel (8) is smaller than that of the sleeve (5); the capillary column sealing structure is characterized in that the sleeve (5) abuts against the stop surface (9), the end part of the capillary column (1) is flush with the end part of the sleeve (5), the screw (2) abuts against the clamping sleeve (6), the clamping sleeve (5) is clamped by the clamping sleeve (6), and the capillary column (1) is clamped by the sleeve (5).
5. The connection assembly of claim 4, wherein: the solid plug (7) is positioned at the top end of the sleeve (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222600590.4U CN218726976U (en) | 2022-09-29 | 2022-09-29 | Capillary column fixed knot constructs and connection assembly on gas chromatograph sampling valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222600590.4U CN218726976U (en) | 2022-09-29 | 2022-09-29 | Capillary column fixed knot constructs and connection assembly on gas chromatograph sampling valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218726976U true CN218726976U (en) | 2023-03-24 |
Family
ID=85637548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222600590.4U Active CN218726976U (en) | 2022-09-29 | 2022-09-29 | Capillary column fixed knot constructs and connection assembly on gas chromatograph sampling valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218726976U (en) |
-
2022
- 2022-09-29 CN CN202222600590.4U patent/CN218726976U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4084718A (en) | Compression seal for elastomeric septum | |
| CA2134350A1 (en) | Piercing and sampling probe | |
| WO2007075289A3 (en) | Fluid free interface for a fluidic analyzer | |
| CN218726976U (en) | Capillary column fixed knot constructs and connection assembly on gas chromatograph sampling valve | |
| CN112683608B (en) | Natural gas sampling device | |
| CN208254897U (en) | The bleeder sample bottle measured for carbon stable isotope in carbon dioxide | |
| CN106596172B (en) | A kind of sampling of structural panel sandwich core glue-joint strength and test instrument | |
| JPWO2011145162A1 (en) | Seal structure for flow path connection | |
| CN209372766U (en) | The gas chromatograph sampling device of head-exchangeable | |
| JP5772376B2 (en) | Sample inlet using septum | |
| CN211347822U (en) | Glass capillary viscometer fixing device | |
| US5339701A (en) | Needle interface apparatus | |
| CN210195887U (en) | Fuel tank of engine | |
| CN208091767U (en) | Sampling probe and sampling needle assemblies | |
| CN212514157U (en) | Core holder for leak-free pulse permeability test | |
| CN2593192Y (en) | Gas sampling joint | |
| CN201392285Y (en) | Insulating oil degassing syringe | |
| CN217328667U (en) | Sampling valve of high use adaptation | |
| CN218822435U (en) | Rotary flower rod | |
| CN218969228U (en) | Optical fiber electrode mounting structure for biological reaction bag and biological reaction bag | |
| CN219757770U (en) | Soil solution sampling head structure and sampling device | |
| CN110448309A (en) | Triple valve | |
| CN207456722U (en) | Test the fixture and its clamp head of plate vibration performance | |
| CN220063543U (en) | Root respiration monitoring device | |
| CN216020540U (en) | Handle and pot cover applying same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |