CN219038504U

CN219038504U - Sampling device for gas chromatography-mass spectrometry instrument

Info

Publication number: CN219038504U
Application number: CN202223169174.XU
Authority: CN
Inventors: 周华亮; 张民哲
Original assignee: Wuhan Shengjiete Instrument Co ltd
Current assignee: Wuhan Shengjiete Instrument Co ltd
Priority date: 2022-11-28
Filing date: 2022-11-28
Publication date: 2023-05-16
Anticipated expiration: 2032-11-28

Abstract

The utility model relates to the technical field of sampling devices and provides a sampling device of an air-mass spectrometer, which comprises a sampling tube, wherein a feeding tube is integrally formed at the top end of the sampling tube, a movable rod is arranged in the sampling tube, the movable rod is of a hollow structure, and a connecting block is fixedly arranged at the bottom end of the movable rod. Through upwards pulling press the briquetting, drive movable rod upward movement to drive the connecting block through the movable rod and upwards move, because the surface of piston piece and the internal surface of sampling tube are closely continuous, consequently when the connecting block upwards moves, can make the inside of sampling tube form negative pressure through the piston piece, thereby absorb the sample, make the sample carry to the sampling tube inside through the inlet pipe and keep in, seal the jam to the bottom port of inlet pipe through sealing mechanism simultaneously, prevent that the sample from flowing back and leaking, and then realize the effect of liquid sampling, the operation procedure is simple convenient.

Description

Sampling device for gas chromatography-mass spectrometry instrument

Technical Field

The utility model relates to the technical field of sampling devices, in particular to a sampling device of a gas chromatography-mass spectrometry instrument.

Background

The gas chromatograph is an instrument used by combining a gas chromatograph and a mass spectrometer, the mass spectrometry can perform effective qualitative analysis, but the analysis of complex organic compounds is not effective, the chromatography is an effective separation analysis method for the organic compounds, and is particularly suitable for the quantitative analysis of the organic compounds, but the qualitative analysis is difficult, so the effective combination of the gas chromatograph and the mass spectrometer can provide a high-efficiency qualitative and quantitative analysis tool for the complex organic compounds for chemists and biochemists;

when detecting, the sample needs to be sampled, and most of the existing sampling devices have complex structures and complex using and operating steps in the using process, so that the use and operation of operators are easily influenced, the operation convenience of the operators is reduced, and therefore, the sampling device of the gas chromatography-mass spectrometry instrument is provided.

Disclosure of Invention

The utility model provides a sampling device of a gas chromatography-mass spectrometry instrument, which solves the problems that the prior sampling device in the related art is complex in structure and complex in using and operating steps in the using process, so that the using and operating of operators are easily influenced, and the operating convenience of the operators is reduced.

The technical scheme of the utility model is as follows: the sampling device comprises a sampling tube, wherein a feeding tube is integrally formed at the top end of the sampling tube, a movable rod is arranged in the sampling tube, the movable rod is of a hollow structure, a connecting block is fixedly arranged at the bottom end of the movable rod, a piston block is fixedly arranged on the outer surface of the connecting block, and the outer surface of the piston block is tightly connected with the inner wall of the sampling tube;

the bottom of movable rod is provided with the sealing mechanism who is used for preventing sample whereabouts, the top of movable rod extends sampling tube fixedly connected with and presses the piece, the top of sampling tube is provided with the detaching mechanism who is convenient for take out movable rod and piston piece.

Preferably: the sealing mechanism comprises a through hole formed in the bottom of the connecting block and communicated with the movable rod and a connecting rod arranged in the through hole, the sealing mechanism further comprises an external thread formed in the outer surface of the connecting rod, internal threads which are connected with the external threads are formed in the inner surfaces of the through hole and the movable rod, the sealing mechanism further comprises a sealing plug fixedly arranged on the outer surface of the bottom end of the connecting rod, a sealing block fixedly connected to the bottom end of the connecting rod, and a sealing ring fixedly arranged on one side of the sealing block and located on the outer side of the sealing plug, the diameter size of the sealing plug is identical with the inner aperture size of the feeding pipe, the sealing plug is convenient to extend into the feeding pipe, the diameter size of the sealing block is larger than the diameter size of the feeding pipe, the inner aperture size of the sealing ring is identical with the diameter size of the feeding pipe, the feeding pipe is convenient to extend into the sealing ring, and the sealing ring is made of rubber materials.

Preferably: the dismounting mechanism comprises a limiting ring arranged at the top end of the sampling tube, a plurality of first screw holes formed in the top of the limiting ring, and a plurality of second screw holes formed in the top end of the sampling tube and corresponding to the first screw holes, wherein the first screw holes and the second screw holes are uniformly distributed in a circular ring form, and fastening bolts are connected with common threads in the first screw holes and the second screw holes.

Preferably: the top of the pressing block is fixedly provided with a handle which is convenient to hold and pull, and the outer surface of the sampling tube is carved with a scale.

Preferably: the upper side and the lower side of the outer surface of the sampling tube are fixedly provided with mounting blocks, and one side of each mounting block is fixedly provided with a brace.

The working principle and the beneficial effects of the utility model are as follows:

1. according to the utility model, the pressing block is pulled upwards to drive the movable rod to move upwards, and the movable rod drives the connecting block to move upwards, so that when the connecting block moves upwards, negative pressure is formed in the sampling tube through the piston block, so that a sample is sucked, the sample is conveyed to the sampling tube through the feeding tube for temporary storage, and meanwhile, the bottom end port of the feeding tube is sealed and blocked through the sealing mechanism, so that the backflow leakage of the sample is prevented, the effect of liquid sampling is realized, the operation steps are simple and convenient, the complicated condition of sampling operation steps is avoided, the operation of operators is facilitated, and the operation convenience of the operators is effectively improved.

2. According to the utility model, when the movable rod moves upwards for sampling, the connecting rod is driven to move upwards, so that the sealing plug is clamped and fixed in the feed pipe, the inside of the feed pipe is blocked, the inner surface of the sealing ring is in sealing contact with the outer surface of the feed pipe, the outer surface of the bottom end of the feed pipe is sealed, the double sealing effect of the feed pipe is realized, the sealing effect of the feed pipe is effectively improved, meanwhile, the bottom end port of the feed pipe is blocked and blocked by the blocking block, and the condition that an internal sample drops and leaks when the sampling pipe shakes is effectively prevented.

Drawings

The utility model will be described in further detail with reference to the drawings and the detailed description.

FIG. 1 is a schematic perspective view of the present utility model;

FIG. 2 is a schematic cross-sectional view of a sampling tube according to the present utility model;

FIG. 3 is a schematic view of a partial structure of a sampling tube according to the present utility model;

FIG. 4 is a schematic view of a partial structure of a connecting rod according to the present utility model;

in the figure: 1. a sampling tube; 2. a feed pipe; 3. a movable rod; 4. a connecting block; 5. a piston block; 6. pressing the blocks; 7. a connecting rod; 8. an external thread; 9. an internal thread; 10. a sealing plug; 11. a block; 12. a seal ring; 13. a limiting ring; 14. a fastening bolt; 15. a handle; 16. a scale; 17. a mounting block; 18. a brace.

Detailed Description

The technical solutions of the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by one of ordinary skill 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.

As shown in fig. 1 to 4, the embodiment provides a sampling device of a gas chromatography-mass spectrometry instrument, which comprises a sampling tube 1, wherein a feeding tube 2 is integrally formed at the top end of the sampling tube 1, a movable rod 3 is arranged in the sampling tube 1, the movable rod 3 is of a hollow structure, a connecting block 4 is fixedly arranged at the bottom end of the movable rod 3, a piston block 5 is adhered to the outer surface of the connecting block 4, and the outer surface of the piston block 5 is tightly connected with the inner wall of the sampling tube 1;

the bottom end of the movable rod 3 is provided with a sealing mechanism for preventing the sample from dripping, the top end of the movable rod 3 extends out of the sampling tube 1 to be fixedly connected with a pressing block 6, and the top end of the sampling tube 1 is provided with a dismounting mechanism for conveniently taking out the movable rod 3 and the piston block 5;

when using to sample, through upwards pulling press piece 6, drive movable rod 3 upward movement, and drive connecting block 4 through movable rod 3 and carry out the upward movement, because the surface of piston piece 5 is closely continuous with the internal surface of sampling tube 1, therefore when connecting block 4 upwards moves, can make the inside of sampling tube 1 form the negative pressure through piston piece 5, thereby absorb the sample, make the sample carry to sampling tube 1 inside through inlet pipe 2 and keep in, seal the jam to the bottom port of inlet pipe 2 through sealing mechanism simultaneously, prevent that the sample from flowing back and leaking, and then realize the effect of liquid sampling, the operation procedure is simple convenient, the comparatively loaded down with trivial details condition of sampling operation step has been avoided appearing, be convenient for operating personnel to operate, operating convenience of operating personnel has effectively been improved.

In this embodiment, specific: the sealing mechanism comprises a through hole which is arranged at the bottom of the connecting block 4 and is communicated with the movable rod 3, and a connecting rod 7 which is arranged in the through hole, the sealing mechanism further comprises an external thread 8 which is arranged on the outer surface of the connecting rod 7, the inner surfaces of the through hole and the movable rod 3 are respectively provided with an internal thread 9 which is in threaded connection with the external thread 8, the sealing mechanism further comprises a sealing plug 10 which is fixedly arranged on the outer surface of the bottom end of the connecting rod 7, a sealing block 11 which is fixedly connected with the bottom end of the connecting rod 7, and a sealing ring 12 which is fixedly arranged on one side of the sealing block 11 and is positioned on the outer side of the sealing plug 10, the diameter size of the sealing plug 10 is the same as the inner aperture size of the feeding pipe 2, the diameter size of the sealing block 11 is larger than the diameter size of the feeding pipe 2, the inner aperture size of the sealing ring 12 is the same as the diameter size of the feeding pipe 2, the feeding pipe 2 is convenient to extend into the sealing ring 12, and the sealing ring 12 is made of rubber materials; when the movable rod 3 moves upwards for sampling, the connecting rod 7 is driven to move upwards, so that the sealing plug 10 is clamped and fixed in the feed pipe 2 and used for blocking the inside of the feed pipe 2, the inner surface of the sealing ring 12 is in sealing contact with the outer surface of the feed pipe 2 and used for sealing the outer surface of the bottom end of the feed pipe 2, the double sealing effect of the feed pipe 2 is realized, the sealing effect of the feed pipe 2 is effectively improved, meanwhile, the bottom end port of the feed pipe 2 is blocked and blocked by the blocking block 11, and the condition that the internal sample drops and leaks when the sampling pipe 1 shakes is effectively prevented;

because the through-hole of seting up on connecting rod 7 and the connecting block 4 is through external screw thread 8, internal screw thread 9 cooperation threaded connection, consequently through rotatory connecting rod 7 downwards, can dismantle sealing mechanism, be convenient for accomodate and carry sampling tube 1, simultaneously through rotatory connecting rod 7 upwards, make the interval between shutoff piece 11 and the inlet pipe 2 shorten, be convenient for carry out regulation and control to the single sampling capacity, realize the effect of ration sample, improved the accuracy and the stability of sample.

In this embodiment, specific: the dismounting mechanism comprises a limiting ring 13 arranged at the top end of the sampling tube 1, a plurality of first screw holes formed at the top of the limiting ring 13, and a plurality of second screw holes formed at the top end of the sampling tube 1 and corresponding to the first screw holes, wherein the inner diameter of the limiting ring 13 is larger than the diameter of the movable rod 3, the first screw holes and the second screw holes are uniformly distributed in a circular ring shape, and the inner parts of the first screw holes and the second screw holes are in common threaded connection with a fastening bolt 14; the fastening bolt 14 is screwed upwards through the tool, so that the limiting ring 13 is detached from the sampling tube 1, the sampling tube 1 is opened, otherwise, the limiting ring 13 is installed, the effect of taking out the movable rod 3 and the piston block 5 is achieved, the piston block 5 is convenient to clean and replace, and the practicability is improved.

In this embodiment, specific: the top of the pressing block 6 is fixedly provided with a handle 15 which is convenient to hold and pull, and the outer surface of the sampling tube 1 is carved with a scale 16; through pressing down pressing block 6, drive movable rod 3 downwardly moving, through holding handle 15, be convenient for upwards pulling movable rod 3, through the marking scale table 16, be convenient for observe sampling volume inside sampling tube 1, guaranteed the sampling volume accuracy of sample.

In this embodiment, specific: the upper side and the lower side of the outer surface of the sampling tube 1 are fixedly provided with mounting blocks 17, and one side of each mounting block 17 is fixedly provided with a brace 18; by providing the braces 18, the sampling tube 1 is convenient to carry, and the carrying convenience is improved.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. The sampling device of the gas chromatography-mass spectrometry instrument comprises a sampling tube (1), and is characterized in that a feeding tube (2) is integrally formed at the top end of the sampling tube (1), a movable rod (3) is arranged in the sampling tube (1), the movable rod (3) is of a hollow structure, a connecting block (4) is fixedly arranged at the bottom end of the movable rod (3), a piston block (5) is fixedly arranged on the outer surface of the connecting block (4), and the outer surface of the piston block (5) is tightly connected with the inner wall of the sampling tube (1);

the bottom of movable rod (3) is provided with the sealing mechanism who is used for preventing sample whereabouts, sampling tube (1) fixedly connected with pressing block (6) are extended on the top of movable rod (3), the top of sampling tube (1) is provided with the detaching mechanism who is convenient for take out movable rod (3) and piston block (5).

2. The sampling device for the gas chromatography-mass spectrometry instrument according to claim 1, wherein the sealing mechanism comprises a through hole formed in the bottom of the connecting block (4) and communicated with the movable rod (3) and a connecting rod (7) arranged in the through hole.

3. The sampling device for the gas chromatography-mass spectrometry instrument according to claim 2, wherein the sealing mechanism further comprises an external thread (8) arranged on the outer surface of the connecting rod (7), and the through hole and the inner surface of the movable rod (3) are respectively provided with an internal thread (9) in threaded connection with the external thread (8).

4. A sampling device for a gas chromatography-mass spectrometry instrument according to claim 3, wherein the sealing mechanism further comprises a sealing plug (10) fixedly installed on the outer surface of the bottom end of the connecting rod (7), a sealing block (11) fixedly connected to the bottom end of the connecting rod (7), and a sealing ring (12) fixedly installed on one side of the sealing block (11) and located outside the sealing plug (10).

5. The sampling device for gas chromatography-mass spectrometry instrument according to claim 4, wherein the diameter of the sealing plug (10) is the same as the inner aperture of the feeding tube (2), so that the sealing plug (10) can extend into the feeding tube (2), and the diameter of the plugging block (11) is larger than the diameter of the feeding tube (2).

6. The sampling device for gas chromatography-mass spectrometry (GC-MS) instrument according to claim 5, wherein the inner aperture of the sealing ring (12) is the same as the diameter of the feeding pipe (2), so that the feeding pipe (2) can extend into the sealing ring (12), and the sealing ring (12) is made of rubber material.

7. The sampling device for the gas chromatography-mass spectrometry instrument according to claim 1, wherein the dismounting mechanism comprises a limiting ring (13) arranged at the top end of the sampling tube (1), a plurality of first screw holes formed at the top of the limiting ring (13), and a plurality of second screw holes formed at the top end of the sampling tube (1) and corresponding to the first screw holes.

8. The sampling device for gas chromatography-mass spectrometry (ms) instrument according to claim 7, wherein the first screw holes and the second screw holes are uniformly distributed in a circular ring form, and the inner parts of the first screw holes and the second screw holes are connected with fastening bolts (14) in a common threaded mode.

9. The sampling device for the gas chromatography instrument according to claim 1, wherein a handle (15) which is convenient to hold and pull is fixedly arranged at the top of the pressing block (6), and a scale (16) is carved on the outer surface of the sampling tube (1).

10. The sampling device for the gas chromatography-mass spectrometry instrument according to claim 1, wherein the upper side and the lower side of the outer surface of the sampling tube (1) are fixedly provided with mounting blocks (17), and one side of each mounting block (17) is fixedly provided with a brace (18) together.