CN211478178U

CN211478178U - Sample introduction system of gas chromatography-mass spectrometer

Info

Publication number: CN211478178U
Application number: CN201922306635.5U
Authority: CN
Inventors: 赵辉
Original assignee: Shanghai Ipro Dva Inspection Technology Co ltd
Current assignee: Shanghai Ipro Dva Inspection Technology Co ltd
Priority date: 2019-12-18
Filing date: 2019-12-18
Publication date: 2020-09-11
Anticipated expiration: 2029-12-18

Abstract

The utility model relates to a sample introduction system of a gas chromatography-mass spectrometer, which relates to the technical field of the gas chromatography-mass spectrometer, and comprises a base, wherein a sample introduction device, a sample introduction disc and a sample storage rack are arranged on the base, a bottle cap is arranged on a sample bottle, a connecting piece is arranged on the sample storage rack, the connecting piece comprises a plurality of mounting rings and connecting rods, the mounting rings are arranged on the sample storage rack, the connecting rods comprise first connecting rods and second connecting rods, the first connecting rods are hinged with the second connecting rods, and the first connecting rods and the second connecting rods are respectively connected with two adjacent mounting rings; the mounting ring and the sample bottle mounted in the mounting ring are taken out from the sample storage rack and then wound on the side wall of the sample feeding plate, and a limiting assembly for fixing the mounting ring and the sample bottle on the sample feeding plate is arranged on the side wall of the sample feeding plate. The utility model discloses have the effect that makes things convenient for the experimenter to change and detect the great sample of quantity, reduce the experimenter work load.

Description

Sample introduction system of gas chromatography-mass spectrometer

Technical Field

The utility model belongs to the technical field of the technique of gas chromatography-mass spectrometry appearance and specifically relates to a sampling system of gas chromatography-mass spectrometry appearance is related to.

Background

The gas chromatography-mass spectrometer is widely applied to the fields of environmental protection industry, electronic industry, textile industry, petrochemical industry, essence and spice industry, medicine industry, agriculture, food safety and the like; analyzing organic pollutants in the environment (analyzing air, water quality and pollution in soil); analyzing pesticide residues, animal residues and medicine residues; analyzing aroma components of the essence and the spice; detection of harmful substances in the textile industry.

The gas chromatography-mass spectrometer comprises a vacuum system, a sample introduction system, an ion source, a mass analyzer, a detector and a workstation for collecting data and controlling the instrument, wherein the sample introduction system comprises a sample injector, a sample introduction disc is arranged below the sample injector, and a test tube bearing a sample is arranged on the sample introduction disc, so that the sample injector moves along the vertical direction to absorb the sample in the test tube arranged on the sample introduction disc so as to introduce the sample.

The patent with publication number CN209559843U discloses a gas chromatography-mass spectrometry combination instrument, which comprises a base, the T-shaped groove has been seted up to the upper end of base, sliding connection has the T shape slider in the T-shaped groove, the upper end fixedly connected with mobile device of T shape slider, the vertical board of the upper end edge fixedly connected with of base, the lateral wall of vertical board rotates and is connected with the door plant, square groove has been seted up in the vertical inboard. The utility model discloses a set up the threaded rod, the drum, rotate the handle part, can rotate the threaded rod with rotating the handle and make it rise and drive the probe and drive income straight flute by the drum, avoid damaging when not using, through setting up the shrink arm, the worm wheel, square groove, the door plant, the pinhole, bolt part can be with the use of whole part of detecting usefulness at the nonuse, through the worm gear transmission, withdraw square inslot, close the door plant, avoid damaging, also can pull out equally when using, the rethread bolt, the pinhole is fixed, thereby can detect.

The above prior art solutions have the following drawbacks: the sample of current detected data need carry out a large amount of contrast and detect, and the test tube on removing the seat needs to be changed many times, and does not couple together between the test tube, and the experimenter needs to change the test tube on removing the seat one by one in order to change the sample, and work load is big and loaded down with trivial details, leads to the operating time extension of gas chromatography mass spectrometer, leads to the extension of experimental time, reduces work efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a gas chromatography mass spectrometer's sampling system has the effect that makes things convenient for the experimenter to change and detect the great sample of quantity, reduces the experimenter work load, shortens the operating time of gas chromatography mass spectrometer, shortens the experimental time, improves work efficiency to prior art exists not enough.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

a sample introduction system of a gas chromatography-mass spectrometer comprises a base, wherein a sample injector, a sample introduction disc which is positioned below the sample injector and is rotationally connected with the base, and a sample storage rack for storing sample bottles are arranged on the base, a bottle cap is arranged on each sample bottle, a through hole for a needle tube of the sample injector to enter is formed in the bottle cap, a connecting piece for connecting a plurality of sample bottles together is arranged on the sample storage rack and comprises a plurality of mounting rings and connecting rods, the mounting rings are arranged on the sample storage rack and sleeved on the outer side wall of each sample bottle, the upper ends of the mounting rings are abutted against the bottom ends of the bottle caps of the sample bottles, the connecting rods are connected between two adjacent mounting rings, each connecting rod comprises a first connecting rod and a second connecting rod, the first connecting rods are hinged with the second connecting rods, and the first connecting rods and the second connecting rods are respectively connected with the two adjacent mounting rings, after the first connecting rod and the second connecting rod rotate, the upper end surface of each mounting ring is on the same plane;

and the side wall of the sample feeding disc is provided with a limiting component which limits the connecting piece and the sample bottle on the connecting piece on the sample feeding disc.

By adopting the technical scheme, the sample bottles are connected into a column through the mounting ring, the first connecting rod and the second connecting rod are hinged, when sample introduction is carried out, the column of sample bottles mounted in the mounting ring is taken out from the sample storage rack and then surrounds the side wall of the sample introduction plate, and the sample bottles are fixed on the sample introduction plate through the limiting assembly; after the sample bottles on the sample feeding disc are detected, the limiting assembly is opened, the sample bottles connected into a circle are taken down, a new row of sample bottles are replaced on the sample feeding disc to be connected into a circle, and detection is carried out; the sample bottles are connected into a column when being arranged on the sample storage rack in advance, so that the sample bottles can be conveniently replaced in the detection process of the gas chromatography-mass spectrometer, the workload of experimenters is reduced, the working time of the gas chromatography-mass spectrometer is shortened, the experimental time is shortened, and the working efficiency is improved.

The present invention may be further configured in a preferred embodiment as: the limiting assembly comprises a base plate fixedly connected to the periphery of the side wall of the sample injection plate and a limiting cylinder connected to the base plate and far away from one side of the outer side wall of the sample injection plate.

Through adopting above-mentioned technical scheme, when the sample bottle encloses into the round on advancing the appearance dish, advance the chassis on appearance dish lateral wall periphery and play the supporting role to the sample bottle to drive lifting unit makes spacing section of thick bamboo rise to spacing bobbin base portion and chassis parallel and level, and spacing section of thick bamboo can prevent effectively that the sample bottle from empting to one side.

The present invention may be further configured in a preferred embodiment as: the lifting assembly is connected with the limiting barrel and drives the limiting barrel to lift, the lifting assembly comprises a gear and a rack, the rack is fixedly connected with the outer side wall of the limiting barrel, a gear shaft center is fixedly connected with a rotating rod, the rotating rod is rotatably connected with the machine base, the gear is meshed with the rack on the limiting barrel, and the gear rotates to drive the rack to lift.

Through adopting above-mentioned technical scheme, the lift of a spacing section of thick bamboo is realized through the gear and the rack of meshing, rotates the dwang and drives gear revolve, and gear revolve drives the rack lift to realize the rising and the decline of a spacing section of thick bamboo, make convenient operation simple.

The present invention may be further configured in a preferred embodiment as: be provided with the cover body on the frame, the gear sets up in the cover body, dwang on the gear rotates to be connected on the cover body, set up the through-hole that supplies the dwang to wear out on the cover body, set up the annular groove on the through-hole lateral wall, spacing piece of fixedly connected with on the dwang, spacing piece rotates to be connected in the annular groove, just the cover body is stretched out to dwang one end on the gear and is connected with the handle, set up the bolt hole of skew handle axis on the handle, threaded connection has fastening bolt on the bolt hole, the fastening bolt afterbody supports tightly with cover body lateral wall.

By adopting the technical scheme, the arrangement of the cover body plays a role in protecting the gear, the annular groove on the cover body is rotationally connected with the limiting piece on the rotating rod, the rotating rod is prevented from sliding along the axial direction of the rotating rod, and the gear and the rack are ensured to be always in a meshed state; the rotating rod penetrates out of the cover body to be connected with the handle, so that the operation of experimenters is further facilitated; in the detection process, the fastening bolt is in threaded connection with the bolt hole in the handle and is tightly abutted to the side wall of the cover body, the bolt hole is eccentrically arranged, the handle and the gear are ensured not to rotate in the detection process, the rack is kept fixed, and the limiting effect of the limiting cylinder is ensured.

The present invention may be further configured in a preferred embodiment as: the upper surface of the chassis is provided with a plurality of anti-skid bulges.

Through adopting above-mentioned technical scheme, have certain anti-skidding effect at the antiskid ribbed tile, can prevent to a certain extent that the sample bottle from toppling over to the outside on transferring to the sample plate from sample storage rack.

The present invention may be further configured in a preferred embodiment as: the sample feeding disc comprises an inner support column and a plurality of arc-shaped grooves which are arranged on the side surface of the inner support column and axially distributed along the inner support column, and the horizontal section of each arc-shaped groove is in an arc shape with the radius being the same as the outer diameter of the mounting ring.

Through adopting above-mentioned technical scheme, the positioning action to the sample bottle is further strengthened in setting up of arc wall on the sample tray lateral wall, and the area of contact of increase sample tray lateral wall and collar and sample bottle enables the collar and sets up the connection structure of the intra-annular sample bottle of collar and sample tray more firm under the combined action of spacing section of thick bamboo and arc wall.

The present invention may be further configured in a preferred embodiment as: the connecting piece includes third connecting rod and fourth connecting rod, third connecting rod and fourth connecting rod are located two of tip respectively the mounting ring is kept away from one side of connecting rod, be provided with the fixed subassembly with third connecting rod and fourth connecting rod fixed connection on third connecting rod and the fourth connecting rod.

Through adopting above-mentioned technical scheme, two collar that lie in the tip are around when advancing the sample dish on, through third connecting rod, fourth connecting rod and fixed subassembly fixed connection, further strengthen the first connection structure between the sample bottle around on advancing the sample dish, can effectively prevent to a certain extent that the sample bottle from pouring over from advancing the sample dish when around to advancing the sample dish.

The present invention may be further configured in a preferred embodiment as: the fixing assembly comprises a first limiting block, a second limiting block and a bolt, the first limiting block is fixedly connected to the third connecting rod, the second limiting block is fixedly connected to the fourth connecting rod, the first limiting block is arranged above the second limiting block, and the bolt sequentially penetrates through the first limiting block and the second limiting block from top to bottom.

By adopting the technical scheme, after the sample bottle is transferred from the sample storage rack to the sample inlet disc, the bolt only needs to sequentially penetrate through the first limiting block and the second limiting block from top to bottom when the third connecting rod and the fourth connecting rod are fixed; after the sample bottle on the sample introduction plate is detected, the gear is rotated to enable the rack to drive the limiting cylinder to descend, the bolt is pulled out of the second limiting block from bottom to top, the third connecting rod and the fourth connecting rod are separated, and the sample bottle is taken down.

The present invention may be further configured in a preferred embodiment as: the bottle lid top is provided with the opening, fixedly connected with rubber piece on the opening, it sets up on the rubber piece to perforate, and perforate and injector needle tube interference fit.

Through adopting above-mentioned technical scheme, injector needle tube top sets up the sheet rubber, perforates and sets up on the sheet rubber, makes injector needle tube pass behind the perforation with sheet rubber interference fit, the setting up of sheet rubber can play the effect that prevents impurity and advance in the sample bottle to a certain extent to make things convenient for the injector needle tube to pass the sheet rubber.

To sum up, the utility model discloses a following at least one useful technological effect:

1. the plurality of sample bottles are connected with the mounting ring through the first connecting rod, the second connecting rod and the mounting ring, so that the effect of facilitating an experimenter to replace and detect a large number of samples is achieved, the workload of the experimenter is reduced, the working time of a gas chromatography-mass spectrometer is shortened, the experimental time is shortened, and the working efficiency is improved;

2. through the lift of a spacing section of thick bamboo, not only make the sample bottle shift to the convenient operation of advancing the sample dish, a spacing section of thick bamboo prevents effectively moreover that the sample bottle from taking place to empty.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic view of a structure for placing a sample bottle on a sample storage rack according to the present invention;

fig. 3 is a schematic structural view of the surrounded sample bottle of the present invention;

FIG. 4 is a schematic structural view of the lowest position of the limiting cylinder of the present invention;

fig. 5 is a schematic structural view of the position limiting cylinder of the present invention at the highest position;

fig. 6 is a schematic diagram of the cover structure of the present invention.

In the figure, 1, a machine base; 11. a sample injector; 12. a sample feeding disc; 121. an arc-shaped slot; 122. an inner support column; 13. a sample storage rack; 131. mounting grooves; 2. a sample bottle; 21. a bottle cap; 22. an opening; 23. a rubber sheet; 231. perforating; 3. a mounting ring; 31. a connecting rod; 311. a first connecting rod; 312. a second connecting rod; 32. a third connecting rod; 33. a fourth connecting rod; 4. a fixing assembly; 41. a first stopper; 42. a second limiting block; 43. a bolt; 5. a limiting component; 51. a chassis; 511. anti-skid projections; 52. a limiting cylinder; 6. a lifting assembly; 61. a gear; 62. a rack; 63. rotating the rod; 631. a limiting sheet; 632. a handle; 7. a cover body; 71. connecting grooves; 72. a through hole; 73. an annular groove; 8. fastening a bolt; 81. bolt holes.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, for the utility model discloses a sampling system of gas chromatography-mass spectrometer, including frame 1, be equipped with injector 11, advance kind dish 12 and sample storage rack 13 on the frame 1, advance kind dish 12 and set up in injector 11 below, have deposited six rows of sample bottles 2 on the sample storage rack 13, and have placed six sample bottles 2 on one.

Referring to fig. 2, a bottle cap 21 is arranged on the sample bottle 2, the sample bottle 2 and the bottle cap 21 are both arranged in a cylindrical shape, an opening 22 is arranged at the top of the bottle cap 21, a rubber sheet 23 is fixedly connected to the opening 22, the circle center of the rubber sheet 23 coincides with the circle center of the top of the bottle cap 21, a through hole 231 is formed in the rubber sheet 23, the through hole 231 is arranged in a cross shape, and when the needle tube of the sample injector 11 extends into the sample bottle 2, the rubber sheet 23 is in interference fit with the needle tube of the sample injector 11.

The sample storage rack 13 is provided with a mounting groove 131, the mounting groove 131 is cylindrical, the sample storage rack 13 is provided with a connecting piece, the connecting piece comprises a mounting ring 3 and a connecting rod 31, the mounting ring 3 is placed on the sample storage rack 13, the diameter of the inner ring of the mounting ring 3 is equal to that of the outer side wall of the sample bottle 2, and the bottom surface of the mounting ring 3 is abutted to the upper surface of the sample storage rack 13. The sample bottle 2 is sequentially loaded into the mounting ring 3 and the mounting groove 131 from top to bottom, and the lower surface of the bottle cap 21 on the sample bottle 2 abuts against the upper surface of the mounting ring 3.

Referring to fig. 2 and 3, the connecting rod 31 is disposed between two adjacent mounting rings 3 in the same column, the connecting rod 31 includes a first connecting rod 311 and a second connecting rod 312, the first connecting rod 311 is hinged to the second connecting rod 312, the first connecting rod 311 and the second connecting rod 312 are respectively fixedly connected to the two adjacent mounting rings 3, the first connecting rod 311 and the second connecting rod 312 rotate in the same plane, and the upper end surface of each mounting ring 3 is on the same plane.

The connecting piece includes third connecting rod 32 and fourth connecting rod 33, and third connecting rod 32 and fourth connecting rod 33 are respectively fixed connection in two mounting rings 3 of tip and keep away from the one side of connecting rod 31, are provided with fixed subassembly 4 on third connecting rod 32 and the fourth connecting rod 33. The fixing assembly 4 includes a first limiting block 41, a second limiting block 42 and a bolt 43, the first limiting block 41 is fixed on the third connecting rod 32, the second limiting block 42 is fixed on the fourth connecting rod 33, the first limiting block 41 is disposed above the second limiting block 42, and the bolt 43 sequentially passes through the first limiting block 41 and the second limiting block 42 from top to bottom.

Referring to fig. 4 and 5, the sample plate 12 of the sample plate 12 comprises an inner support column 122 and six arc-shaped grooves 121 which are arranged on the side surface of the inner support column 122 and distributed along the axial direction of the inner support column 122, wherein the horizontal section of each arc-shaped groove 121 is a semicircle with the same radius as the outer diameter of the mounting ring 3. When the sample bottle 2 surrounds the sample feeding tray 12, the sample bottle 2 is placed in the arc-shaped groove 121, and the end surface of the bottom end of the mounting ring 3 is abutted to the upper surface of the sample feeding tray 12.

The outer side wall of the sample injection disc 12 is provided with a limiting component 5. The limiting assembly 5 comprises a base plate 51 and a limiting cylinder 52, the base plate 51 is fixedly connected to the periphery of the side wall of the sampling plate 12, the base plate 51 is provided with a plurality of anti-skid protrusions 511, and the anti-skid protrusions 511 are arranged below the arc-shaped groove 121.

The limiting cylinder 52 is arranged on one side of the base plate 51 far away from the outer side wall of the sampling disc 12, and the lifting assembly 6 is connected to the limiting cylinder 52. The lifting assembly 6 comprises a gear 61 and a rack 62, the rack 62 is fixedly connected with the outer side wall of the limiting cylinder 52, a rotating rod 63 is fixedly connected to the axis of the gear 61, and the rack 62 is meshed with the gear 61. When the limiting cylinder 52 descends to the lowest position, the inner side wall of the top end of the limiting cylinder 52 is abutted with the outer side wall of the base plate 51.

Referring to fig. 5 and 6, the base 1 is fixedly connected with a cover 7, the limiting cylinder 52, the rack 62 and the gear 61 are all arranged in the cover 7, and the cover 7 is provided with a connecting groove 71 for the limiting cylinder 52 and the rack 62 to slide upwards. Offer the through-hole 72 that supplies the dwang 63 on the gear 61 to wear out on the cover body 7, seted up annular groove 73 on the through-hole 72 lateral wall, spacing piece 631 of fixedly connected with on the dwang 63, spacing piece 631 cross section is circular, and spacing piece 631 rotates to be connected in annular groove 73, and the dwang 63 one end on the gear 61 stretches out the cover body 7 and fixedly connected with handle 632.

The handle 632 is provided with a bolt hole 81, the bolt hole 81 deviates from the axis of the handle 632, the cover body 7 is provided with a connecting hole, the bolt hole 81 is connected with a fastening bolt 8, the tail part of the fastening bolt 8 is tightly abutted against the side wall of the cover body 7, and the head part of the fastening bolt 8 is tightly abutted against the handle 632 near the end face of the tail part.

The implementation principle of the embodiment is as follows: the method comprises the steps that a sample bottle 2 is placed in a mounting ring 3 on a sample storage rack 13 in advance, during detection, the mounting ring 3 and the sample bottle 2 placed in the mounting ring 3 are transferred to the outer side wall of a sample inlet disc 12 from the sample storage rack 13, wherein the sample bottle 2 surrounds the outer side wall of the sample inlet disc 12 by adjusting the angle between a first connecting rod 311 and a second connecting rod 312, the sample bottle 2 is placed in an arc-shaped groove 121, and then a bolt 43 sequentially penetrates through a first limiting block 41 on a third connecting rod 32 and a second limiting block 42 on a fourth connecting rod 33 from top to bottom; then the fastening bolt 8 is screwed out of the connecting hole on the cover body 7, the gear 61 is rotated to rotate the handle 632 of the rotating rod 63, the gear 61 is driven to rotate, the gear 61 rotates to drive the rack 62 to move upwards, the rack 62 moves upwards to drive the limiting cylinder 52 to ascend until the bottom end face of the limiting cylinder 52 is flush with the bottom end face of the sample feeding disc 12, and then the fastening bolt 8 is screwed until the tail part of the fastening bolt 8 abuts against the side wall of the cover body 7 and the end face of the head part of the fastening bolt 8, which is close to the tail part, abuts against the handle 632.

When the sample bottle 2 on the sample feeding disc 12 is taken down, the fastening bolt 8 is firstly screwed out of the connecting hole on the cover body 7, the handle 632 is reversely rotated to drive the gear 61 to rotate, at the moment, the gear 61 drives the rack 62 to move downwards, and the rack 62 moves downwards to drive the limiting cylinder 52 to descend until the top of the inner side wall of the limiting cylinder 52 is flush with the end face of the bottom of the sample feeding disc 12; and then the bolt 43 is pulled out from the bottom to the top, the third connecting rod 32 is separated from the fourth connecting rod 33, and the mounting ring 3 and the sample bottle 2 placed in the mounting ring 3 are taken out from the sample feeding tray 12.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a sampling system of gas chromatography mass spectrometer, includes frame (1), be equipped with sample injector (11) on frame (1), be located sample injector (11) below and with frame (1) rotate sample tray (12) of being connected and be used for depositing sample storage rack (13) of sample bottle (2), its characterized in that: the sample bottle (2) is provided with a bottle cap (21), the bottle cap (21) is provided with a through hole (231) for a needle tube of a sample injector (11) to enter, the sample storage rack (13) is provided with a connecting piece for connecting a plurality of sample bottles (2) together, the connecting piece comprises a plurality of mounting rings (3) and connecting rods (31), the mounting rings (3) are placed on the sample storage rack (13), the mounting rings (3) are sleeved on the outer side walls of the sample bottles (2), the upper ends of the mounting rings (3) are abutted against the bottom ends of the bottle caps (21) of the sample bottles (2), the connecting rods (31) are connected between two adjacent mounting rings (3), the connecting rods (31) comprise first connecting rods (311) and second connecting rods (312), the first connecting rods (311) are hinged with the second connecting rods (312), and the first connecting rods (311) and the second connecting rods (312) are respectively connected with the two adjacent mounting rings (3), after the first connecting rod (311) and the second connecting rod (312) rotate, the upper end surface of each mounting ring (3) is on the same plane;

and the side wall of the sample feeding disc (12) is provided with a limiting component (5) which limits the connecting piece and the sample bottle (2) on the connecting piece to the sample feeding disc (12).

2. The sample introduction system of the gas chromatography-mass spectrometer of claim 1, wherein: the limiting assembly (5) comprises a base plate (51) fixedly connected to the periphery of the side wall of the sampling disc (12) and a limiting cylinder (52) connected to one side, far away from the outer side wall of the sampling disc (12), of the base plate (51).

3. The sample introduction system of the gas chromatography-mass spectrometer of claim 2, wherein: be connected with lifting unit (6) that drives spacing section of thick bamboo (52) and go up and down on spacing section of thick bamboo (52), lifting unit (6) include gear (61) and rack (62), rack (62) and spacing section of thick bamboo (52) lateral wall fixed connection, fixedly connected with dwang (63) on gear (61) axle center, dwang (63) rotate with frame (1) and are connected, just rack (62) meshing on gear (61) and spacing section of thick bamboo (52), gear (61) rotation drives rack (62) and goes up and down.

4. The sample introduction system of the gas chromatography-mass spectrometer of claim 3, wherein: the machine base (1) is provided with a cover body (7), the gear (61) is arranged in the cover body (7), a rotating rod (63) on the gear (61) is rotationally connected to the cover body (7), the cover body (7) is provided with a through hole (72) for the rotating rod (63) to penetrate out, an annular groove (73) is formed in the side wall of the through hole (72), a limiting piece (631) is fixedly connected to the rotating rod (63), the limiting piece (631) is rotatably connected to the annular groove (73), and one end of a rotating rod (63) on the gear (61) extends out of the cover body (7) and is connected with a handle (632), the handle (632) is provided with a bolt hole (81) deviating from the axis of the handle (632), and the bolt holes (81) are in threaded connection with fastening bolts (8), and the tail parts of the fastening bolts (8) are tightly abutted against the side walls of the cover body (7).

5. The sample introduction system of the gas chromatography-mass spectrometer of claim 2, wherein: the upper surface of the chassis (51) is provided with a plurality of anti-skid protrusions (511).

6. The sample introduction system of the gas chromatography-mass spectrometer of claim 5, wherein: the sampling disc (12) comprises an inner support column (122) and a plurality of arc-shaped grooves (121) which are arranged on the side face of the inner support column (122) and axially distributed along the inner support column (122), and the horizontal cross section of each arc-shaped groove (121) is arc-shaped, the radius of each arc-shaped groove is the same as the outer diameter of the corresponding mounting ring (3).

7. The sample introduction system of the gas chromatography-mass spectrometer of claim 1, wherein: the connecting piece includes third connecting rod (32) and fourth connecting rod (33), third connecting rod (32) and fourth connecting rod (33) are located two of tip respectively install ring (3) and keep away from one side of connecting rod (31), be provided with on third connecting rod (32) and fourth connecting rod (33) fixed connection's fixed subassembly (4).

8. The sample introduction system of the gas chromatography-mass spectrometer of claim 7, wherein: fixed subassembly (4) include first stopper (41), second stopper (42) and bolt (43), first stopper (41) fixed connection is on third connecting rod (32), second stopper (42) fixed connection is on fourth connecting rod (33), just first stopper (41) set up in second stopper (42) top, bolt (43) are from last to passing first stopper (41) and second stopper (42) down in proper order.

9. The sample introduction system of the gas chromatography-mass spectrometer of claim 1, wherein: bottle lid (21) top is provided with opening (22), fixedly connected with sheet rubber (23) on opening (22), punch hole (231) are seted up on sheet rubber (23), and punch hole (231) and injector (11) needle tube interference fit.