CN220419252U - Gas chromatography multipath automatic sampler - Google Patents

Abstract

The utility model relates to the technical field of gas chromatography sample injectors, in particular to a gas chromatography multipath automatic sample injector, which comprises a gasification chamber and an injector, wherein the side wall of the gasification chamber is arranged at a carrier gas inlet, the top of the gasification chamber is provided with a fixed rod, the inside of the fixed rod is connected with a movable sleeve in a sliding manner, and the injector is arranged in the movable sleeve. According to the utility model, the purpose of protecting the needle head is achieved when the injector is used for injecting the sample by arranging the fixing rod and the movable sleeve, the bending condition caused by mistakenly touching surrounding metal by the needle head is reduced, the sample injection can be carried out on a gas-liquid sample by arranging the heating mechanism, the sample injection can also be carried out after the gas-solid sample is preheated, the crystallization phenomenon caused by the fact that the gas-solid sample stays in the injector for a long time is reduced, the sample injection accuracy is improved, the sampling needle is protected, the injector with different sizes can be used by arranging the fixing mechanism, and the use flexibility of the injector is enhanced.

Description

Gas chromatography multipath automatic sampler

Technical Field

The utility model relates to the technical field of gas chromatography sample injectors, in particular to a gas chromatography multipath automatic sample injector.

Background

Gas chromatograph refers to a chromatographic instrument using gas as mobile phase. The principle is mainly to realize the separation of the mixture by utilizing the differences of the boiling point, the polarity and the adsorption property of the substances. The sample to be analyzed is brought into the chromatographic column by an inert gas (i.e., carrier gas, also known as mobile phase) after vaporization in the vaporization chamber, the column contains a liquid or solid stationary phase, and the components of the sample all tend to form a partition or adsorption equilibrium between the mobile phase and the stationary phase. Along with the flow of the carrier gas, the sample component is repeatedly distributed or adsorbed/desorbed in the motion, the component with large concentration is distributed in the carrier gas to flow out of the chromatographic column, and the component with large concentration is distributed in the fixed phase to flow out.

The patent with publication number CN209327288U discloses a gas chromatograph injector, prevent that the syringe needle from touching the sample inlet metal and being pricked and bent and the influence that the finger caused to the sample because of the heat transfer when holding the cylinder, guarantee the repeatability of the volume of advance sample analysis, low cost, the practicality is strong, but this injector can only take a sample to gas-liquid sample, and the weather chromatograph uses including gas-solid sample and gas-liquid sample, when using to gas-solid sample, because gas-solid sample crystallization is solid under normal atmospheric temperature, generally need carry out the water bath preheating to the sample before advancing the sample and carry out the operation and handle, therefore this injector is easy to make gas-solid sample temperature reduction when using and lead to crystallization, inconvenient use, the patent with publication number CN217688764U discloses a gas chromatograph autosampler, not only can preheat the sample, and heat more accurate to the sample when preheating, more energy saving. The heating position can also be adjusted according to actual use condition, and the suitability is high, but the device does not mention how to make the sample get into the gasification chamber automatically, so a sample injector that can get into the gasification chamber with gas-solid sample or gas-liquid sample automatically to can also melt to gas-solid sample, avoid leading to sampling needle breakage and sample injection inaccurate sample injector at sample injection in-process temperature reduction.

Disclosure of Invention

The utility model aims to provide a gas chromatography multipath automatic sampler, which solves the problems that in the prior art, a gas-solid sample and a gas-liquid sample cannot automatically enter a gasification chamber, and the gas-solid sample cannot be melted, and even if the gas-solid sample is melted in advance, crystallization and solidification can be caused by temperature reduction in the process of sampling by an injector, so that sampling is inaccurate, and a sampling needle is damaged.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides a gas chromatograph multichannel autoinjector, includes gasification chamber and syringe, the lateral wall of gasification chamber sets up in the carrier gas entry, the top of gasification chamber is provided with the dead lever, the inside sliding connection of dead lever has the removal cover, the syringe sets up the inside at the removal cover, the inside of removing the cover is provided with the fixed establishment who is used for fixing the syringe, the top fixed mounting who removes the cover has the pole setting, the pole setting is "L" shape structure, the bottom fixed mounting of pole setting has the second electric telescopic handle, the inner wall of removing the cover is provided with the heating mechanism who is used for carrying out the heating to the syringe.

Preferably, the bottom fixed mounting of dead lever has the fixing base, the surface of fixing base is provided with the bolt, the dead lever passes through fixing base and bolt installation at the top of gasification chamber.

Preferably, the fixing mechanism comprises two clamping blocks, the side walls of the two clamping blocks are fixedly provided with connecting blocks, the side wall of the movable sleeve is rotatably inserted with a screw rod, two sections of opposite threads are arranged on the screw rod by taking the midpoint of the screw rod as a boundary line, two ends of the screw rod respectively penetrate through the two connecting blocks, and a rotating handle is fixedly arranged at a port of the screw rod.

Preferably, the two clamping blocks are provided with V-shaped grooves on one sides close to each other.

Preferably, the heating mechanism comprises a connecting cylinder, the inside of the connecting cylinder is of a hollow structure, the side wall of the connecting cylinder is communicated with a fixed pipe, one end of the fixed pipe, which is far away from the connecting cylinder, is communicated with a transition pipe, a heating net is arranged in the transition pipe, one end of the transition pipe, which is far away from the fixed pipe, is communicated with a hose, and one end of the hose, which is far away from the transition pipe, is communicated with the output end of an external air pump.

Preferably, the inner wall of the connecting cylinder is uniformly provided with air outlets.

Preferably, a first electric telescopic rod is fixedly arranged on the surface of the fixed seat, and an output end port of the first electric telescopic rod is fixedly connected with the movable sleeve.

The utility model has at least the following beneficial effects:

through setting up dead lever and removal cover, play the purpose of protection syringe needle in the time of making the syringe advance, reduce the syringe needle mistake and bump peripheral metal and lead to the bending condition, advance the sample through setting up heating mechanism and can advance the sample to the gas-liquid sample, also can advance the sample after preheating the gas-solid sample, reduce the gas-solid sample and lead to crystallization phenomenon in the inside longer of staying of syringe, improve advance the accuracy, protect the sample needle, can use to the syringe of equidimension not through the fixed establishment who sets up, the flexibility that the reinforcing syringe used, the degree of automation has been improved through the first electric telescopic handle and the second electric telescopic handle that set up.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of a fixing rod according to the present utility model;

FIG. 3 is a cross-sectional view of a mobile sleeve of the present utility model;

fig. 4 is a cross-sectional view of the connecting cylinder of the present utility model.

In the figure: 1. a gasification chamber; 2. a carrier gas inlet; 3. a fixed rod; 4. a fixing seat; 5. a first electric telescopic rod; 6. a moving sleeve; 7. a vertical rod; 8. a second electric telescopic rod; 9. a syringe; 10. clamping blocks; 11. a connecting block; 12. a screw rod; 13. a connecting cylinder; 14. a fixed tube; 15. a heating net; 16. a hose; 17. a transition pipe.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model 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 utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

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. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

The electrical components are all connected with an external main controller and 220V mains supply, and the main controller can be conventional known equipment for controlling a computer and the like.

In describing embodiments of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "inner", "outer", "upper", etc. are directions or positional relationships based on those shown in the drawings, or those that are conventionally put in place when the inventive product is used, are merely for convenience of description and simplification of description, and are not indicative or implying that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Referring to FIGS. 1-4, a gas chromatograph multi-channel autoinjector includes a gasification chamber 1 and an injector 9, the side wall of the gasification chamber 1 is arranged at a carrier gas inlet 2, the top of the gasification chamber 1 is provided with a fixed rod 3, the inside of the fixed rod 3 is slidably connected with a movable sleeve 6, the injector 9 is arranged inside the movable sleeve 6, the inside of the movable sleeve 6 is provided with a fixing mechanism for fixing the injector 9, the top of the movable sleeve 6 is fixedly provided with a vertical rod 7, the vertical rod 7 is of an L-shaped structure, the bottom of the vertical rod 7 is fixedly provided with a second electric telescopic rod 8, the inner wall of the movable sleeve 6 is provided with a heating mechanism for heating the injector 9, in use, the fixed rod 3 is arranged at the top center of the gasification chamber 1, a spacer for aligning the vertical center of the fixed rod 3 at the top of the gasification chamber 1 (refer to patent with CN 209327288U) uses the injector 9 to extract a sample, then the syringe 9 is inserted into the movable sleeve 6, the syringe 9 is fixed by utilizing the fixing mechanism in the movable sleeve 6, then the movable sleeve 6 is moved downwards, the movable sleeve 6 is positioned in the fixed rod 3, the syringe 9 is driven to move downwards synchronously when moving downwards along the movable sleeve 6, so that the needle of the syringe 9 passes through the positioning hole (refer to patent with publication number CN 209327288U), then the second electric telescopic rod 8 is started, the extension of the second electric telescopic rod 8 presses the piston rod of the syringe 9 downwards, so that the sample in the syringe 9 is pressed into the gasification chamber 1, and further the sample injection is realized, when the sample injection is carried out on the gas-solid sample, the sample can be firstly extracted into the syringe 9, then the syringe 9 is arranged in the movable sleeve 6, then, the heating mechanism is utilized to achieve the purpose of preheating the sample in the injector 9, the crystallization phenomenon caused by the fact that the gas-solid sample stays in the injector 9 for a long time is reduced, the injector 9 is made of high-temperature-resistant stainless steel, and the deformation phenomenon caused by high temperature can be reduced.

Further, a fixing seat 4 is fixedly arranged at the bottom of the fixing rod 3, bolts are arranged on the surface of the fixing seat 4, and the fixing rod 3 is arranged at the top of the gasification chamber 1 through the fixing seat 4 and the bolts.

Further, the fixing mechanism comprises two clamping blocks 10, connecting blocks 11 are fixedly arranged on the side walls of the two clamping blocks 10, a screw rod 12 is inserted into the side wall of the moving sleeve 6 in a rotating mode, two sections of opposite threads are arranged on the screw rod 12 by taking the middle point of the screw rod as a dividing line, two ends of the screw rod 12 penetrate through the two connecting blocks 11 respectively in a threaded mode, a rotating handle is fixedly arranged at a port of the screw rod 12, the fixing mechanism is used, after the syringe 9 is inserted into the moving sleeve 6 in use, the rotating handle is manually rotated, the rotating handle drives the screw rod 12 to rotate, the screw rod 12 can drive the two connecting blocks 11 to drive the two clamping blocks 10 to move in opposite directions, and therefore the purpose of clamping and fixing the syringe 9 is achieved by the aid of the clamping blocks 10.

Further, the side that two clamp splice 10 are close to each other all has seted up "V" shape groove, further strengthens the fixed effect to syringe 9 through the "V" shape groove that sets up.

Further, the heating mechanism comprises a connecting cylinder 13, the inside of the connecting cylinder 13 is of a hollow structure, the side wall of the connecting cylinder 13 is communicated with a fixed pipe 14, one end of the fixed pipe 14, which is far away from the connecting cylinder 13, is communicated with a transition pipe 17, a heating net 15 is arranged in the transition pipe 17, one end of the transition pipe 17, which is far away from the fixed pipe 14, is communicated with a hose 16, one end of the hose 16, which is far away from the transition pipe 17, is communicated with the output end of an external air pump, the heating mechanism is used for pumping air into the hose 16 by using the external air pump, the air flow passes through the transition pipe 17, and is heated by using the heating net 15 in the transition pipe 17, so that the air flow is heated when entering the inside of the connecting cylinder 13, and the connecting cylinder 13 is sleeved outside the injector 9, thereby enabling the hot air flow to act on the injector 9 made of stainless steel materials, and achieving the aim of preheating a gas-solid sample.

Further, the inner wall of the connecting cylinder 13 is uniformly provided with air outlets, and the hot air flow can directly act on the injector 9 through the arranged air outlets.

Further, the fixed seat 4 is fixedly provided with a first electric telescopic rod 5 on the surface, the output end port of the first electric telescopic rod 5 is fixedly connected with the movable sleeve 6, and the movable sleeve 6 can be driven to automatically move downwards by arranging the first electric telescopic rod 5, so that the needle head of the injector 9 passes through the positioning hole, and the degree of automation is enhanced.

In summary, in the use, the fixing rod 3 is installed at the top center position of the gasification chamber 1, the vertical center position of the fixing rod 3 is aligned with the spacer at the top of the gasification chamber 1 (refer to patent publication No. CN 209327288U), the sample is extracted by the syringe 9, then the syringe 9 is inserted into the interior of the moving sleeve 6, the syringe 9 is fixed by the fixing mechanism inside the moving sleeve 6, then the moving sleeve 6 is moved downwards, the syringe 9 is driven to move downwards synchronously when the moving sleeve 6 is positioned in the interior of the fixing rod 3 and moves downwards along the moving sleeve 6, so that the needle of the syringe 9 passes through the positioning hole (refer to patent publication No. CN 209327288U), then the second electric telescopic rod 8 is started, the extension of the second electric telescopic rod 8 presses the piston rod of the syringe 9 downwards, so that the sample inside the syringe 9 is pressed into the gasification chamber 1, when the gas-solid sample is injected, the sample can be firstly extracted into the syringe 9, then the syringe 9 is arranged in the movable sleeve 6, then the heating mechanism is utilized to achieve the aim of preheating the sample in the syringe 9, the crystallization phenomenon caused by the fact that the gas-solid sample stays in the syringe 9 for a long time is reduced, the syringe 9 is made of high-temperature resistant stainless steel, the deformation phenomenon caused by higher temperature can be reduced, the fixing mechanism is used, after the syringe 9 is inserted into the movable sleeve 6, the rotating handle is manually rotated, the rotating handle drives the screw rod 12 to rotate, the screw rod 12 can drive the two connecting blocks 11 to drive the two clamping blocks 10 to move in opposite directions, the purpose of clamping and fixing the syringe 9 is achieved by utilizing the clamping blocks 10, the fixing mechanism is arranged, the syringe 9 that can adapt to different sizes uses, the fixed effect to syringe 9 is further strengthened through the "V" groove that sets up, the heating mechanism is in use and is used outside air pump to bleed into hose 16, the air current passes transition pipe 17, heat by the heating net 15 in the transition pipe 17, it is heated when the air current is advanced inside connecting cylinder 13, and connecting cylinder 13 overlaps the outside of syringe 9 again, thereby with hot air current effect on stainless steel's syringe 9, play the purpose of preheating the gas-solid sample, through the air outlet that sets up, make hot air current can directly act on syringe 9, through setting up first electric telescopic handle 5, can drive moving sleeve 6 and move down voluntarily, make syringe 9's syringe needle pass the locating hole, degree of automation has been strengthened.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made therein without departing from the spirit and scope of the utility model, which is defined by the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (7)

1. The utility model provides a gas chromatograph multichannel autoinjector, includes gasification chamber (1) and syringe (9), its characterized in that, the lateral wall of gasification chamber (1) sets up in carrier gas entry (2), the top of gasification chamber (1) is provided with dead lever (3), the inside sliding connection of dead lever (3) has movable sleeve (6), syringe (9) set up in the inside of movable sleeve (6), the inside of movable sleeve (6) is provided with the fixed establishment who is used for carrying out fixing to syringe (9), the top fixed mounting of movable sleeve (6) has pole setting (7), pole setting (7) are "L" shape structure, the bottom fixed mounting of pole setting (7) has second electric telescopic handle (8), the inner wall of movable sleeve (6) is provided with the heating mechanism who is used for carrying out heating to syringe (9).

2. The gas chromatography multi-channel automatic sampler according to claim 1, wherein a fixing seat (4) is fixedly arranged at the bottom of the fixing rod (3), bolts are arranged on the surface of the fixing seat (4), and the fixing rod (3) is arranged at the top of the gasification chamber (1) through the fixing seat (4) and the bolts.

3. The gas chromatograph multi-channel automatic sampler according to claim 1, characterized in that the fixing mechanism comprises two clamping blocks (10), the side walls of the two clamping blocks (10) are fixedly provided with connecting blocks (11), a screw rod (12) is rotatably inserted into the side wall of the movable sleeve (6), the screw rod (12) is provided with two sections of opposite threads by taking the midpoint of the screw rod as a boundary line, two ends of the screw rod (12) respectively penetrate through the two connecting blocks (11), and a rotating handle is fixedly arranged at a port of the screw rod (12).

4. A gas chromatograph multiplex autosampler according to claim 3, characterized in that the two clamping blocks (10) are each provided with a "V" shaped groove on the side thereof which is adjacent to each other.

5. The gas chromatograph multi-channel automatic injector according to claim 1, characterized in that the heating mechanism comprises a connecting cylinder (13), the inside of the connecting cylinder (13) is of a hollow structure, a fixed pipe (14) is communicated with the side wall of the connecting cylinder (13), a transition pipe (17) is communicated with one end of the fixed pipe (14) far away from the connecting cylinder (13), a heating net (15) is arranged in the transition pipe (17), a hose (16) is communicated with one end of the transition pipe (17) far away from the fixed pipe (14), and one end of the hose (16) far away from the transition pipe (17) is communicated with the output end of an external air pump.

6. The gas chromatography multi-channel autosampler according to claim 5, wherein the inner wall of the connecting cylinder (13) is uniformly provided with air outlets.

7. The gas chromatograph multi-channel automatic sampler according to claim 2, characterized in that a first electric telescopic rod (5) is fixedly arranged on the surface of the fixed seat (4), and an output end port of the first electric telescopic rod (5) is fixedly connected with the movable sleeve (6).