CN213843140U

CN213843140U - Vacuum holding device for gas chromatography-mass spectrometer

Info

Publication number: CN213843140U
Application number: CN202022022182.6U
Authority: CN
Inventors: 崔晓明; 刘超
Original assignee: Tianjin Lianchuang Environmental Protection Monitoring Co ltd
Current assignee: Tianjin Lianchuang Environmental Protection Monitoring Co ltd
Priority date: 2020-09-16
Filing date: 2020-09-16
Publication date: 2021-07-30
Anticipated expiration: 2030-09-16

Abstract

The utility model provides a vacuum retaining device for gas chromatography-mass spectrometer belongs to mechanical technical field. The vacuum holding device for the gas chromatography-mass spectrometer comprises a feeding device, a sealing mechanism, a clamping mechanism and a material taking mechanism. The feeding device comprises a shell, a first electric cylinder and a vacuum tube, the feeding piece is fixed at the output end of the first electric cylinder, the sealing mechanism comprises a cavity and a sealing piece, the cavity is fixed on the top surface of the shell, the clamping mechanism comprises a third electric cylinder and a clamping piece, the output end of the third electric cylinder penetrates through the shell, the lifting plate is fixed at the output end of the third electric cylinder, the output end of the fourth electric cylinder penetrates through the charging barrel, and the supporting plate is connected with the inner surface of the charging barrel in a sliding mode. The utility model discloses can make the cavity that forms between closing plate and backup pad and the casing, as far as possible few entering air to practice thrift the evacuation required time, reduced energy resource consumption.

Description

Vacuum holding device for gas chromatography-mass spectrometer

Technical Field

The utility model relates to the technical field of machinery, particularly, relate to a vacuum holding device for gas chromatography-mass spectrometer.

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; the detection of harmful matter in textile industry uses adsorbent with large surface area and certain activity as stationary phase in gas-fixation spectrometry.

At present, the existing vacuum holding device for the gas chromatography-mass spectrometer can cause a large amount of air to enter in the vacuum holding process, and the consumption is large in the repeated vacuum pumping process.

SUMMERY OF THE UTILITY MODEL

In order to compensate above not enough, the utility model provides a vacuum hold device for gas chromatography mass spectrometer aims at improving vacuum hold device for gas chromatography mass spectrometer, keeps the in-process in the vacuum, can lead to a large amount of air to get into, the great problem of evacuation in-process consumption repeatedly.

The utility model discloses a realize like this:

the utility model provides a vacuum retaining device for gas chromatography-mass spectrometer, including material feeding unit, sealing mechanism, fixture and feeding agencies.

The feeding device comprises a shell, a first electric cylinder, a feeding piece and a vacuum tube, wherein the first electric cylinder is arranged on the outer surface of one side of the shell, the output end of the first electric cylinder penetrates through the shell and extends into the shell, the feeding piece is fixed at the output end of the first electric cylinder, the feeding piece is connected with the inner surface of the shell in a sliding manner, the vacuum tube is fixedly communicated with the top surface of the shell, the vacuum tube is communicated with an external vacuum pump, the sealing mechanism comprises a cavity, a second electric cylinder and a sealing piece, the cavity is fixed on the top surface of the shell, the second electric cylinder is arranged on the top surface of the cavity, the cavity is positioned on one side of the vacuum tube, the output end of the second electric cylinder penetrates through the cavity and extends into the shell, the sealing piece is fixed at the output end of the second electric cylinder, the sealing piece penetrates through the shell, and the bottom of the sealing piece is clamped in the shell, the clamping mechanism comprises a third electric cylinder, a lifting plate and a clamping piece, the third electric cylinder is installed on the top surface of the shell, the third electric cylinder is located on the other side of the vacuum tube, the output end of the third electric cylinder penetrates through the shell, the lifting plate is fixed at the output end of the third electric cylinder, the clamping piece is fixed at the bottom of the lifting plate, the material taking mechanism comprises a charging basket, a fourth electric cylinder and a supporting plate, the charging basket is integrally formed, communicated and fixed at the bottom of one side of the shell, the fourth electric cylinder is installed at the bottom of the charging basket, the output end of the fourth electric cylinder penetrates through the charging basket, the supporting plate is fixed at the output end of the fourth electric cylinder, and the supporting plate is connected with the inner surface of the charging basket in a sliding mode.

The utility model discloses an in one embodiment, the pay-off piece includes first fixed plate and blowing board, first fixed plate is fixed the output of first electric jar, first fixed plate with the internal surface sliding connection of casing, the blowing board is fixed surface one side of first fixed plate.

The utility model discloses an in one embodiment, the spacing groove has been seted up on the surface of blowing board, the surface of first fixed plate is fixed with the rubber pad all around.

The utility model discloses an in one embodiment, the sealing member includes diaphragm and closing plate, the diaphragm is fixed the output of second electric cylinder, the diaphragm with the surface sliding connection of cavity, the closing plate is fixed the bottom of diaphragm, the closing plate slides and runs through the casing.

The utility model discloses an in an embodiment, the inside of casing seted up with closing plate assorted draw-in groove, the bottom joint of closing plate is in the inside of draw-in groove, the inside of draw-in groove is fixed with the sealing layer.

The utility model discloses an in one embodiment, the holder includes fixed block, servo motor, transfer line and grip block, the fixed block is fixed the bottom of lifter plate, the spout has been seted up to the bottom of fixed block, servo motor installs one side of fixed block, the transfer line rotates to be connected the inside of spout, the transfer line with servo motor fixed connection, the grip block screw thread runs through the surface of transfer line.

The utility model discloses an in one embodiment, the transfer line includes first threaded rod and second threaded rod, the one end of first threaded rod is rotated and is connected the inside of spout, the second threaded rod is fixed the other end of first threaded rod, the tip of second threaded rod with the tip fixed connection of servo motor output shaft, the grip block screw thread runs through first threaded rod with the surface of second threaded rod.

In an embodiment of the present invention, the thread structures of the first threaded rod and the second threaded rod are opposite.

The utility model discloses an in the embodiment, the external fixed surface of lifter plate has the rubber layer, the size of lifter plate with the size of storage bucket is the phase-match setting.

In an embodiment of the present invention, the feeding opening and the discharging opening are respectively disposed on the surface of the casing and the surface of the charging bucket.

The utility model has the advantages that: the utility model discloses a vacuum holding device for gas chromatography-mass spectrometry combination appearance that obtains through above-mentioned design, when using, the closing plate joint is in the draw-in groove of casing inside, the backup pad is located the top of discharge gate, then communicate with external vacuum pump through the vacuum tube, vacuum pumping operation forms a vacuum cavity, at this moment put article into the surface spacing groove of blowing board through the pay-off mouth, at this moment, under the effect of first electric jar drive blowing board to one side through first fixed plate and move, make first fixed plate be located one side of pay-off mouth, at this moment second electric jar work drive closing plate shrink to the inside of cavity, then first electric jar continues to drive blowing board and moves, make the material be located the below of holder, at this moment third electric jar work drive holder move downwards, press from both sides the material, at this moment first electric jar drive blowing board retract, when first fixed plate does not move to pay-off mouth department, thereby the electric jar of second drives the closing plate and seals in inserting the draw-in groove, meanwhile the work of third electric jar drives the lifter plate and removes to the inside of storage bucket, when the inside slip laminating of lifter plate and storage bucket, the backup pad is placed to holder work in the raw materials, then the electric jar of fourth returns and contracts, at this moment take the raw materials through the discharge gate, again with the backup pad from the laminating of newly-removing with the storage bucket inner wall of discharge gate upper end after having taken, then the electric jar of third drives the holder and returns and contracts, in operation, like this, can make the cavity that forms between closing plate and backup pad and the casing, as few entering air as far as possible, thereby practice thrift the required time of evacuation and then reduced energy resource consumption.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic view of a first view angle structure of a vacuum holding device for a gas chromatography-mass spectrometer provided by an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a vacuum holding device for a gas chromatograph-mass spectrometer according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a feeding member of a vacuum holding device for a gas chromatography-mass spectrometer provided by an embodiment of the present invention;

fig. 4 is a schematic view of a cross-sectional structure of a clamping mechanism of a vacuum holding device for a gas chromatograph-mass spectrometer according to an embodiment of the present invention.

In the figure: 100-a feeding device; 110-a housing; 111-card slot; 112-a feed port; 120-a first electric cylinder; 130-a feeding member; 131-a first fixing plate; 132-a discharge plate; 1321-a limiting groove; 140-vacuum tube; 200-a sealing mechanism; 210-a cavity; 220-a second electric cylinder; 230-a seal; 231-a transverse plate; 232-sealing plate; 300-a clamping mechanism; 310-a third electric cylinder; 320-a lifting plate; 330-a clamp; 331-fixed block; 3311-chute; 332-a servo motor; 333-transmission rod; 3331-first threaded rod; 3332-second threaded rod; 334-clamping plate; 400-a material taking mechanism; 410-a charging basket; 411-a discharge port; 420-a fourth electric cylinder; 430-support plate.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but 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.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Examples

Referring to fig. 1-4, the present invention provides a technical solution: a vacuum holding device for a gas chromatography-mass spectrometer comprises a feeding device 100, a sealing mechanism 200, a clamping mechanism 300 and a material taking mechanism 400.

The sealing mechanism 200 is fixed on the feeding device 100 and used for sealing to form a vacuum space, the clamping mechanism 300 is installed on the feeding device 100 and used for clamping and transferring materials, and the taking mechanism 400 is fixed on the feeding device 100 and used for taking raw materials.

Referring to fig. 1-3, the feeding device 100 includes a housing 110, a first electric cylinder 120, a feeding member 130, and a vacuum tube 140, the first electric cylinder 120 is mounted on an outer surface of one side of the housing 110, an output end of the first electric cylinder 120 extends to the inside through the housing 110, the feeding member 130 is fixed on the output end of the first electric cylinder 120, the feeding member 130 is slidably connected to an inner surface of the housing 110, the vacuum tube 140 is fixedly connected to a top surface of the housing 110, and the vacuum tube 140 is communicated with an external vacuum pump.

The feeding member 130 comprises a first fixing plate 131 and a discharging plate 132, the first fixing plate 131 is fixed at the output end of the first electric cylinder 120, the first fixing plate 131 is slidably connected with the inner surface of the housing 110, and the discharging plate 132 is fixed at one side of the surface of the first fixing plate 131; spacing groove 1321 has been seted up on the surface of blowing board 132, and the surface of first fixed plate 131 is fixed with the rubber pad all around, and the setting of rubber pad can strengthen the leakproofness between first fixed plate 131 and the casing 110, and here through the setting of first fixed plate 131 and blowing board 132, can remove under the effect of first electric jar 120, can conveniently carry out spacing placing, the clamp of being convenient for to article through the effect of spacing groove 1321.

Referring to fig. 1-2, the sealing mechanism 200 includes a cavity 210, a second electric cylinder 220 and a sealing member 230, the cavity 210 is fixed on the top surface of the housing 110, the second electric cylinder 220 is installed on the top surface of the cavity 210, the cavity 210 is located on one side of the vacuum tube 140, an output end of the second electric cylinder 220 extends through the cavity 210 to the inside, the sealing member 230 is fixed on an output end of the second electric cylinder 220, the sealing member 230 penetrates through the housing 110, and a bottom of the sealing member 230 is clamped inside the housing 110.

The sealing element 230 comprises a transverse plate 231 and a sealing plate 232, the transverse plate 231 is fixed at the output end of the second electric cylinder 220, the transverse plate 231 is slidably connected with the surface of the cavity 210, the sealing plate 232 is fixed at the bottom of the transverse plate 231, and the sealing plate 232 slidably penetrates through the housing 110; the draw-in groove 111 with closing plate 232 assorted is seted up to casing 110's inside, and the bottom joint of closing plate 232 is in the inside of draw-in groove 111, and the inside of draw-in groove 111 is fixed with the sealing layer, and here through second electric cylinder 220 drive closing plate 232 downwards the removal joint in draw-in groove 111, can seal one side of casing 110.

Referring to fig. 1, 2 and 4, the clamping mechanism 300 includes a third electric cylinder 310, a lifting plate 320 and a clamping member 330, the third electric cylinder 310 is installed on the top surface of the housing 110, the third electric cylinder 310 is located on the other side of the vacuum tube 140, the output end of the third electric cylinder 310 penetrates through the housing 110, the lifting plate 320 is fixed on the output end of the third electric cylinder 310, and the clamping member 330 is fixed on the bottom of the lifting plate 320.

The clamping member 330 comprises a fixed block 331, a servo motor 332, a transmission rod 333 and a clamping plate 334, the fixed block 331 is fixed at the bottom of the lifting plate 320, a chute 3311 is formed at the bottom of the fixed block 331, the servo motor 332 is installed at one side of the fixed block 331, the transmission rod 333 is rotatably connected inside the chute 3311, the transmission rod 333 is fixedly connected with the servo motor 332, and the clamping plate 334 penetrates through the outer surface of the transmission rod 333 in a threaded manner; the transmission rod 333 includes a first threaded rod 3331 and a second threaded rod 3332, one end of the first threaded rod 3331 is rotatably connected to the inside of the slide slot 3311, wherein a bearing is interference-connected to an end of the first threaded rod 3331, the bearing is embedded in the slide slot 3311 and can be fixed and rotated conveniently, the second threaded rod 3332 is fixed to the other end of the first threaded rod 3331, an end of the second threaded rod 3332 is fixedly connected to an end of an output shaft of the servo motor 332, and the clamping plate 334 is threaded on outer surfaces of the first threaded rod 3331 and the second threaded rod 3332; the thread structures of the first threaded rod 3331 and the second threaded rod 3332 are opposite; the servo motor 332 is provided with a power supply, the servo motor 332 works to drive the first threaded rod 3331 and the second threaded rod 3332 to rotate, so that the clamping plate 334 moves relatively, articles are clamped and fixed, and the articles can be transferred conveniently.

The rubber layer is fixed on the outer surface of the lifting plate 320, the size of the lifting plate 320 is matched with that of the charging bucket 410, the rubber layer can enhance the sealing performance between the lifting plate 320 and the charging bucket 410, the lifting plate 320 moves into the charging bucket 410, a cavity can be formed between the sealing plate 232 and the shell 110 in a matched mode, and therefore air can be reduced in the feeding and material taking processes, energy consumption is reduced, and resources are saved.

Referring to fig. 1 and 2, the material taking mechanism 400 includes a material barrel 410, a fourth electric cylinder 420 and a supporting plate 430, the material barrel 410 is integrally formed, communicated and fixed at the bottom of one side of the casing 110, the fourth electric cylinder 420 is installed at the bottom of the material barrel 410, an output end of the fourth electric cylinder 420 penetrates through the material barrel 410, the supporting plate 430 is fixed at the output end of the fourth electric cylinder 420, and the supporting plate 430 is slidably connected with an inner surface of the material barrel 410.

The surfaces of the shell 110 and the charging bucket 410 are respectively provided with a feeding port 112 and a discharging port 411, so that the raw materials can be conveniently fed and taken.

Specifically, the working principle of the vacuum holding device for the gas chromatography-mass spectrometer is as follows: when the device is used, the sealing plate 232 is clamped in the clamping groove 111 in the shell 110, the supporting plate 430 is positioned above the discharge port 411, then the device is communicated with an external vacuum pump through the vacuum tube 140 to perform vacuum pumping operation to form a vacuum cavity, at this time, an article is placed into the surface limiting groove 1321 of the material placing plate 132 through the feeding port 112, at this time, the material placing plate 132 is driven to move to one side through the first fixing plate 131 under the action of the first electric cylinder 120, the first fixing plate 131 is positioned at one side of the feeding port 112, at this time, the second electric cylinder 220 is operated to drive the sealing plate 232 to contract into the cavity 210, then the first electric cylinder 120 continues to drive the material placing plate 132 to move, so that the material is positioned below the clamping member 330, at this time, the third electric cylinder 310 is operated to drive the clamping member 330 to move downwards to clamp the material, at this time, the first electric cylinder 120 drives the material placing plate 132 to retract, when the first fixing plate 131 does not move to the feeding port 112, the second electric cylinder 220 drives the sealing plate 232 to be inserted into the clamping groove 111 for sealing, meanwhile, the third electric cylinder 310 works to drive the lifting plate 320 to move towards the inside of the charging basket 410, when the lifting plate 320 is in sliding fit with the inside of the charging basket 410, the clamping piece 330 works to place raw materials on the supporting plate 430, then the fourth electric cylinder 420 retracts, at the moment, the raw materials are taken through the discharging opening 411, after the raw materials are taken, the supporting plate 430 is attached to the inner wall of the charging basket 410 at the upper end of the discharging opening 411 from a new movement, then the third electric cylinder 310 drives the clamping piece 330 to retract, in the operation process, a cavity formed between the sealing plate 232 and the supporting plate 430 and the shell 110 can be enabled, air enters as few as possible, and therefore the time required by vacuumizing is saved, and energy consumption is reduced.

It should be noted that the specific model specifications of the first electric cylinder 120, the second electric cylinder 220, the third electric cylinder 310, the fourth electric cylinder 420, and the servo motor 332 need to be determined by type selection according to the actual specification of the device, and the specific type selection calculation method adopts the prior art in the field, so detailed description is omitted.

The power supply of the first electric cylinder 120, the second electric cylinder 220, the third electric cylinder 310, the fourth electric cylinder 420 and the servo motor 332 and the principle thereof will be apparent to those skilled in the art and will not be described in detail herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A vacuum holding device for a gas chromatography-mass spectrometer is characterized by comprising

The feeding device (100) comprises a shell (110), a first electric cylinder (120), a feeding piece (130) and a vacuum pipe (140), wherein the first electric cylinder (120) is installed on the outer surface of one side of the shell (110), the output end of the first electric cylinder (120) penetrates through the shell (110) and extends to the inside, the feeding piece (130) is fixed at the output end of the first electric cylinder (120), the feeding piece (130) is connected with the inner surface of the shell (110) in a sliding mode, the vacuum pipe (140) is fixedly communicated with the top surface of the shell (110), and the vacuum pipe (140) is communicated with an external vacuum pump;

the sealing mechanism (200) comprises a cavity (210), a second electric cylinder (220) and a sealing element (230), the cavity (210) is fixed on the top surface of the shell (110), the second electric cylinder (220) is installed on the top surface of the cavity (210), the cavity (210) is located on one side of the vacuum tube (140), the output end of the second electric cylinder (220) penetrates through the cavity (210) and extends to the inside, the sealing element (230) is fixed on the output end of the second electric cylinder (220), the sealing element (230) penetrates through the shell (110), and the bottom of the sealing element (230) is clamped inside the shell (110);

the clamping mechanism (300) comprises a third electric cylinder (310), a lifting plate (320) and a clamping piece (330), the third electric cylinder (310) is installed on the top surface of the shell (110), the third electric cylinder (310) is located on the other side of the vacuum pipe (140), the output end of the third electric cylinder (310) penetrates through the shell (110), the lifting plate (320) is fixed at the output end of the third electric cylinder (310), and the clamping piece (330) is fixed at the bottom of the lifting plate (320);

reclaiming mechanism (400), reclaiming mechanism (400) includes storage bucket (410), fourth electric jar (420) and backup pad (430), storage bucket (410) integrated into one piece intercommunication is fixed one side bottom of casing (110), install fourth electric jar (420) the bottom of storage bucket (410), the output of fourth electric jar (420) runs through storage bucket (410), backup pad (430) are fixed the output of fourth electric jar (420), backup pad (430) with the internal surface sliding connection of storage bucket (410).

2. The vacuum holding device for the gas chromatography-mass spectrometer according to claim 1, wherein the feeding member (130) comprises a first fixing plate (131) and a discharging plate (132), the first fixing plate (131) is fixed at the output end of the first electric cylinder (120), the first fixing plate (131) is slidably connected with the inner surface of the housing (110), and the discharging plate (132) is fixed at one side of the surface of the first fixing plate (131).

3. The vacuum holding device for the gas chromatography-mass spectrometer as claimed in claim 2, wherein a limiting groove (1321) is formed on the surface of the material feeding plate (132), and a rubber pad is fixed around the outer surface of the first fixing plate (131).

4. The vacuum holding device for the gas chromatograph-mass spectrometer according to claim 1, wherein the sealing member (230) comprises a horizontal plate (231) and a sealing plate (232), the horizontal plate (231) is fixed at the output end of the second electric cylinder (220), the horizontal plate (231) is slidably connected with the surface of the cavity (210), the sealing plate (232) is fixed at the bottom of the horizontal plate (231), and the sealing plate (232) slidably penetrates through the housing (110).

5. The vacuum holding device for the gas chromatography-mass spectrometer as claimed in claim 4, wherein a slot (111) matched with the sealing plate (232) is formed in the housing (110), the bottom of the sealing plate (232) is clamped in the slot (111), and a sealing layer is fixed in the slot (111).

6. The vacuum holding device for the gas chromatography-mass spectrometer according to claim 1, wherein the clamping member (330) comprises a fixing block (331), a servo motor (332), a transmission rod (333) and a clamping plate (334), the fixing block (331) is fixed at the bottom of the lifting plate (320), a sliding groove (3311) is formed in the bottom of the fixing block (331), the servo motor (332) is installed at one side of the fixing block (331), the transmission rod (333) is rotatably connected inside the sliding groove (3311), the transmission rod (333) is fixedly connected with the servo motor (332), and the clamping plate (334) is threaded through the outer surface of the transmission rod (333).

7. The vacuum holding apparatus for a gas chromatography-mass spectrometer according to claim 6, wherein the transmission rod (333) comprises a first threaded rod (3331) and a second threaded rod (3332), one end of the first threaded rod (3331) is rotatably connected to the inside of the chute (3311), the second threaded rod (3332) is fixed to the other end of the first threaded rod (3331), the end of the second threaded rod (3332) is fixedly connected to the end of the output shaft of the servo motor (332), and the holding plate (334) is threaded through the outer surfaces of the first threaded rod (3331) and the second threaded rod (3332).

8. The vacuum holding apparatus for a gas chromatography-mass spectrometer according to claim 7, wherein the thread structures of the first threaded rod (3331) and the second threaded rod (3332) are oppositely arranged.

9. The vacuum holding device for the gas chromatography-mass spectrometer as claimed in claim 1, wherein a rubber layer is fixed on the outer surface of the lifting plate (320), and the size of the lifting plate (320) is matched with the size of the charging basket (410).

10. The vacuum holding device for the gas chromatography-mass spectrometer as claimed in claim 1, wherein the surface of the housing (110) and the surface of the charging bucket (410) are respectively provided with a feeding port (112) and a discharging port (411).