CN213781986U

CN213781986U - Sample introduction device of mass spectrometer

Info

Publication number: CN213781986U
Application number: CN202023332416.3U
Authority: CN
Inventors: 王婷婷; 高金川
Original assignee: Hebei Tianhua Shengquan Chemical Co ltd
Current assignee: Hebei Tianhua Shengquan Chemical Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-07-23
Anticipated expiration: 2030-12-31

Abstract

The utility model relates to a sampling device of mass spectrometer relates to the field of mass spectrometer, and it includes the mass spectrometer main part, is equipped with the introduction port in the mass spectrometer main part, and introduction mechanism is installed on introduction port upper portion, and introduction mechanism includes a plurality of injection needles that are equipped with detection liquid and drives the first drive assembly of injection needle to the motion of introduction port department, introduction mechanism is still including being used for detecting the extrusion subassembly of liquid to the interior extrusion of introduction port in the injection needle. This application has the efficiency of the appearance of advancing that improves detection liquid, reduces the possibility of advancing the appearance mistake in-process, has improved the effect of the accuracy that detects liquid detection structure.

Description

Sample introduction device of mass spectrometer

Technical Field

The application relates to the field of mass spectrometers, in particular to a sample feeding device of a mass spectrometer.

Background

Mass spectrometers are centered around an ion source, a mass analyzer and an ion detector. The ion source is a device that ionizes sample molecules under high vacuum conditions. The ionized molecules are further fragmented into a plurality of fragment ions and neutral particles of smaller mass due to the excessive energy received. They gain average kinetic energy with the same energy under the action of the accelerating electric field and enter the mass analyzer.

Among the correlation technique, including the mass spectrograph main part, the mass spectrograph main part is equipped with the inlet port, and the detection liquid dress that awaits measuring is in the syringe needle, and the mass spectrograph needs the staff to press the syringe needle when the appearance of advancing for detect the liquid and get into in the inlet port.

For the related technologies, the inventor thinks that the manual sample injection efficiency is low, and the manual sample injection is busy and disorderly during a large amount of detection, errors are easy to occur, and the detection cannot be performed in order.

SUMMERY OF THE UTILITY MODEL

In order to improve the sampling efficiency of detection liquid, reduce the possibility that takes place the mistake among the sampling process, this application provides a sampling device of mass spectrometer.

The application provides a sampling device of mass spectrometer adopts following technical scheme:

the utility model provides a sampling device of mass spectrometer, includes the mass spectrometer main part, is equipped with the inlet in the mass spectrometer main part, and sampling mechanism is installed on inlet upper portion, and sampling mechanism includes a plurality of injection needles that are equipped with detection liquid and drives the first drive assembly of injection needle to the motion of inlet department, sampling mechanism is still including being used for detecting the extrusion subassembly of liquid to the inlet extrusion in the injection needle.

Through adopting above-mentioned technical scheme, when the detection liquid measure of waiting to detect is great, will detect liquid and put in a plurality of injection needle, then place injection needle in first drive assembly, first drive assembly drives injection needle and removes to introduction port department, then extrude injection needle through extrusion subassembly, thereby in the detection liquid in the injection needle passes through introduction port entering mass spectrograph main part, improve the sampling efficiency who detects liquid, reduce the possibility of the mistake of appearance in-process of advancing, the accuracy that detects liquid detection structure has been improved.

Optionally, the first driving assembly comprises a first driving part, the first driving part is two first motors rotating synchronously, the output ends of the first motors are fixedly connected with rotating shafts, one ends of the rotating shafts, far away from the first motors, are fixedly connected with chain wheels, the chain wheels are meshed with chains, and the outer sides of the chains are fixedly connected with a plurality of fixing rings for placing sampling needles.

Through adopting above-mentioned technical scheme, when first motor starts, first motor drives pivot and sprocket synchronous rotation, and the sprocket drives solid fixed ring and rotates to drive the injection needle on the solid fixed ring and remove to the introduction port, simple structure, be convenient for installation and maintenance.

Optionally, the extrusion assembly comprises a second driving piece, and the second driving piece is connected with a pressing block for extruding the sample injection needle.

Through adopting above-mentioned technical scheme, second driving piece drive briquetting extrudees the syringe needle, briquetting and the push rod butt of syringe needle during the extrusion for the detection liquid in the syringe needle can pour into in to the introduction port, has improved the sampling efficiency who detects liquid.

Optionally, the second driving piece is a second motor, an output end of the second motor is fixedly connected with a first lead screw, the first lead screw is in threaded connection with a sliding block, and the sliding block is fixedly connected with the pressing block.

Through adopting above-mentioned technical scheme, when the second motor starts, the second motor drives first lead screw and rotates for the slider can drive the briquetting and slide from top to bottom along the lead screw, thereby briquetting up-and-down motion's route is more stable, and the route takes place the skew to cause the possibility of unable extrusion injection needle when having reduced the briquetting downstream.

Optionally, the first motor is fixedly connected with a fixing plate, and the fixing plate is connected with a third driving assembly for driving the fixing plate to lift.

Through adopting above-mentioned technical scheme, after the syringe needle is placed and is accomplished, drive the fixed plate through the third drive assembly and descend for the distance between syringe needle and the introduction port reduces, thereby has reduced the syringe needle and has extruded the possibility outside the introduction port in extrusion process, has improved the accuracy that the mass spectrograph detected, has improved the convenience of distance adjustment between syringe needle and the introduction port.

Optionally, the third driving assembly includes a third driving member, the third driving member includes two third motors rotating synchronously, the output ends of the two third motors are fixedly connected with a second lead screw, and the second lead screw is in threaded connection with the two ends of the fixing plate in the length direction.

Through adopting above-mentioned technical scheme, when the third motor starts, the third motor drives the second lead screw and rotates, and the second lead screw drives the fixed plate and goes up and down, has improved the stability that the fixed plate goes up and down, has reduced the error when detecting the liquid and advance the appearance.

Optionally, the third motor is a servo motor.

By adopting the technical scheme, the dynamic corresponding time of acceleration and deceleration of the third motor is short, the accuracy of the third motor in controlling the lifting position of the fixing plate is improved, and the possibility of heating of the third motor is reduced.

Optionally, the first motor and the second motor are both servo motors.

Through adopting above-mentioned technical scheme for the developments relevant time of first motor and second motor acceleration and deceleration is short, has improved the accurate nature of first motor to advancing injection needle rotational position control, has improved the accurate nature of second motor to briquetting lift position control, has reduced the error that the detection liquid advances a kind.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the sample introduction efficiency of the detection liquid is improved, the possibility of error in the sample introduction process is reduced, and the accuracy of the detection structure of the detection liquid is improved;

2. the possibility that the sample injection needle is extruded outside the sample injection port in the extrusion process is reduced, the accuracy of mass spectrometer detection is improved, and the convenience of distance adjustment between the sample injection needle and the sample injection port is improved.

Drawings

FIG. 1 is a schematic diagram of a sample injection device structure of a mass spectrometer according to an embodiment of the present application.

FIG. 2 is a schematic view of a fixing plate structure embodying the present invention.

Description of reference numerals: 1. a mass spectrometer body; 11. a sample inlet; 2. a sample injection needle; 3. a first drive assembly; 31. a first motor; 32. a rotating shaft; 33. a sprocket; 34. a chain; 35. a fixing ring; 4. an extrusion assembly; 41. a second motor; 42. briquetting; 43. a first lead screw; 44. a slider; 5. a fixing plate; 6. a third drive assembly; 61. a third motor; 62. and a second lead screw.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

The embodiment of the application discloses a sampling device of a mass spectrometer. Referring to fig. 1, including mass spectrograph main part 1, mass spectrograph main part 1 is placed on operation platform, and the upper surface of mass spectrograph main part 1 is equipped with inlet port 11, and sampling mechanism is installed on mass spectrograph main part 1 upper portion, and sampling mechanism is including being equipped with the syringe 2 that detects the liquid and bearing the first drive assembly 3 of syringe 2, and mass spectrograph main part 1 upper portion still is equipped with and is used for detecting the extrusion subassembly 4 that liquid extrudees in to inlet port 11 in the syringe 2.

Referring to fig. 1 and 2, the first driving assembly 3 includes a first driving member, the first driving member is two first motors 31, the extruding assembly 4 includes a second driving member, the second driving member is a second motor 41, and both the first motor 31 and the second motor 41 are servo motors. The first motor 31 and the second motor 41 are both fixedly connected with a fixing plate 5, and the fixing plate 5 is connected with a third driving assembly 6 for driving the fixing plate 5 to ascend and descend.

Two first motor 31 synchronous rotation, the output orientation of first motor 31 is kept away from one side of mass spectrometer main part 1, the equal fixedly connected with pivot 32 of output of first motor 31, the equal fixedly connected with sprocket 33 of one end that first motor 31 was kept away from to pivot 32, the meshing has chain 34 on the

sprocket

33, 34 side fixedly connected with of chain a plurality of elastic solid fixed rings 35 that have, gu fixed ring 35 sets up a week along chain 34, syringe 2 pegs graft with solid fixed ring 35, gu fixed ring 35 tightly abuts with the lateral wall of syringe 2, it is relative with introduction port 11 to extrude subassembly 4.

Referring to fig. 1, when a relatively large amount of detection liquid needs to be detected, place a plurality of injection needles 2 on solid fixed ring 35, then first motor 31 starts, first motor 31 drives pivot 32 and begins to rotate, pivot 32 drives sprocket 33 and rotates, thereby sprocket 33 drives injection needle 2 and rotates to injection port 11 department, when injection needle 2 rotates to injection port 11 department, extrusion subassembly 4 starts, extrusion subassembly 4 extrudes and rotates injection needle 2 to injection port 11 department, make the interior detection liquid of injection needle 2 enter into mass spectrometer main part 1 along injection port 11.

Referring to fig. 1 and 2, the pressing assembly 4 further includes a pressing block 42, the output end of the second motor 41 facing away from one side of the mass spectrometer main body 1 is connected with a first lead screw 43, the first lead screw 43 is in threaded connection with a long-strip-shaped sliding block 44, the sliding block 44 is close to the lower surface of the mass spectrometer main body 1 and is fixedly connected with the pressing block 42, and the pressing block 42 is arranged opposite to the sample inlet 11.

When the injection needle 2 rotates to the injection port 11, the second motor 41 is started, the second motor 41 drives the lead screw to rotate, so that the slide block 44 drives the press block 42 to slide to one side close to the mass spectrometer main body 1, and in the sliding process, the press block 42 extrudes the push rod of the injection needle 2, so that the detection liquid in the injection needle 2 enters the injection port 11. After extrusion, the second motor 41 rotates reversely, so that the slider 44 drives the pressing block 42 to rise along the lead screw to one side far away from the mass spectrometer main body 1, and when the next sampling needle 2 rotates to the sampling port 11, the extrusion work of the sampling needle 2 is continuously and repeatedly performed.

Referring to fig. 1 and 2, the third driving assembly 6 includes a third driving member, the third driving member includes two third motors 61, the third motors 61 are all servo motors, the two third motors 61 are disposed on two sides of the mass spectrometer main body 1, the two third motors 61 rotate synchronously, the output ends of the third motors 61 facing the fixing plate 5 are connected with second lead screws 62, and the second lead screws 62 are connected with two ends of the fixing plate 5 in the length direction in a threaded manner.

When the injection needle 2 is placed in the fixing ring 35 to prepare for extrusion work, two third motors 61 are synchronously started, the third motor 61 drives the second lead screw 62 to rotate, the second lead screw 62 drives the fixing plate 5 to descend to one side close to the injection port 11, so that the distance between the needle port of the injection needle 2 and the injection port 11 is shortened, the possibility that the detection liquid is extruded to the outside of the injection port 11 in the extrusion process is reduced, the accuracy of mass spectrometer detection is improved, and the convenience of distance adjustment between the injection needle 2 and the injection port 11 is improved. After the injection needle 2 is extruded, the third motor 61 rotates reversely, and the third motor 61 drives the fixing plate 5 to ascend, so that the distance between the injection needle 2 and the injection port 11 can be adjusted next time.

The implementation principle of the sample feeding device of the mass spectrometer is as follows: when a large amount of detection liquid needs to be detected, the sample injection needle 2 filled with the detection liquid is placed on the fixing ring 35, the third motor 61 is started, and the distance between the sample injection needle 2 and the sample injection port 11 is adjusted.

Then start first motor 31, first motor 31 drives sprocket 33 and rotates, and sprocket 33 drives chain 34 and rotates, and when the injection needle 2 on the solid fixed ring 35 aligns with injection port 11, second motor 41 starts, and second motor 41 drives slider 44 downstream to briquetting 42 extrudes the push pedal of injection needle 2, injects the detection liquid in the injection needle 2 into injection port 11.

After the single injection needle 2 is extruded, the second motor 41 rotates reversely, the second motor 41 drives the pressing block 42 to ascend, the first motor 31 is started, and the injection needle 2 is continuously driven to move towards the injection port 11.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A sampling device of a mass spectrometer is characterized in that: including mass spectrograph main part (1), be equipped with on mass spectrograph main part (1) and advance a kind of port (11), introduction mechanism is installed on introduction port (11) upper portion, and introduction mechanism includes a plurality of injection needle (2) and the first drive assembly (3) that drive injection needle (2) to the motion of introduction port (11) department of being equipped with the detection liquid, introduction mechanism is still including being used for detecting extrusion subassembly (4) of liquid to introduction port (11) internal extrusion in injection needle (2).

2. The sample introduction device of a mass spectrometer of claim 1, wherein: first drive assembly (3) include first driving piece, and first driving piece is two synchronous pivoted first motor (31), the equal fixedly connected with pivot (32) of output of first motor (31), and the equal fixedly connected with sprocket (33) of one end of first motor (31) are kept away from in pivot (32), and sprocket (33) meshing has chain (34), and chain (34) outside fixedly connected with is a plurality of solid fixed ring (35) that are used for placing injection needle (2).

3. The sample introduction device of a mass spectrometer of claim 2, wherein: the extrusion assembly (4) comprises a second driving piece, and the second driving piece is connected with a pressing block (42) used for extruding the sample injection needle (2).

4. A sample introduction device for a mass spectrometer as claimed in claim 3, characterised in that: the second driving piece is a second motor (41), the output end of the second motor (41) is fixedly connected with a first lead screw (43), the first lead screw (43) is in threaded connection with a sliding block (44), and the sliding block (44) is fixedly connected with a pressing block (42).

5. The sample introduction device of a mass spectrometer of claim 2, wherein: first motor (31) fixedly connected with fixed plate (5), fixed plate (5) are connected with third drive assembly (6) that drive fixed plate (5) go up and down.

6. The sample introduction device of a mass spectrometer of claim 5, wherein: the third driving assembly (6) comprises a third driving piece, the third driving piece is two third motors (61) which rotate synchronously, the output ends of the two third motors (61) are fixedly connected with second lead screws (62), and the second lead screws (62) are in threaded connection with the two ends of the fixing plate (5) in the length direction.

7. The sample introduction device of a mass spectrometer of claim 6, wherein: the third motor (61) is a servo motor.

8. The sample introduction device of a mass spectrometer according to claim 4, wherein: the first motor (31) and the second motor (41) are both servo motors.