CN220651945U - Mass spectrometer electronic spray needle assembly - Google Patents

Abstract

The utility model discloses an electronic needle assembly of a mass spectrometer, which comprises an ion source cavity, wherein an electronic needle fixing assembly is arranged in the ion source cavity, a needle sliding inner sleeve is connected in the electronic needle fixing assembly through threads, a needle sliding outer sleeve is arranged outside the needle sliding inner sleeve, a vertical position sensor is arranged outside the needle sliding outer sleeve, two vertical springs are connected with the needle sliding inner sleeve and the needle sliding outer sleeve, a vertical direction adjusting seat is fixedly connected to the outer surface of the needle sliding inner sleeve, and a self-locking rotation adjusting column is connected to the inner wall of the vertical direction adjusting seat through threads. On the basis of two-dimensional adjustment of the spray needle, the spray needle angle adjustment is added, the problem of fixed angles of the spray needle and a mass spectrum interface of a product on the market is solved, the adjustment of three dimensions is all set to electric adjustment, and position feedback exists, so that a series of problems caused by manual adjustment are solved, and automatic spray needle adjustment is realized.

Description

Mass spectrometer electronic spray needle assembly

Technical Field

The utility model relates to the technical field of mass spectrometers, in particular to a mass spectrometer electronic spray needle assembly.

Background

Mass spectrometers are instruments for analyzing particles, the basic principle of which is to ionize microscopic particles into ions (by an ion source) and then separate the ions of different mass-to-charge ratios by a mass analyzer (quadrupole mass analyzer, time-of-flight mass analyzer, magnetic mass analyzer, etc.), thereby performing quantitative/qualitative analysis of the ions.

In order to improve ionization efficiency, a common manufacturer adds a position adjusting device for an electric spray needle, the adjusting device of the spray needle is basically manually adjusted, is time-consuming and labor-consuming, is greatly influenced by the level of operators, is low in efficiency, is not fully automated and intelligent, is large in size, has no position feedback or imperfect feedback, is basically changed into a manual adjusting mode into a motor control mode, has no performance evaluation mode and no feedback control, still needs personnel to perform effect judgment, is not substantially improved in ion source performance, automation and intelligence, is arranged at 90 degrees or 60 degrees in most spray needles and mass spectrum interfaces in the market, is not adjustable in angle, can only adjust two dimensions or one dimension in the vertical direction and the left-right direction of the spray needle, is not multidimensional and refined enough, and cannot meet the requirement of adjusting the ion source spray needle.

Disclosure of Invention

The utility model aims to provide a mass spectrometer electric spray needle assembly, which aims to solve the problems that in the background technology, in order to improve ionization efficiency, a position adjusting device is added for an electric spray needle by a common manufacturer, the adjusting device of the spray needle is basically manually adjusted, time and labor are wasted, the effect of the adjusting device on the level of an operator is large, the efficiency is low, automation and intellectualization are not enough, even an electric adjusting device is large in size, no position feedback or imperfect feedback exists, a manual adjusting mode is basically changed into a motor control mode, no performance evaluation mode is provided, no feedback control is needed, the effect judgment is still needed by personnel, the ion source performance, the automation and the intellectualization are not substantially improved, most spray needles and mass spectrum interfaces in the market are arranged at 90 degrees or 60 degrees, the angle is not adjustable, only the up-down direction and the left-right direction of the spray needle are not sufficiently multi-dimensional and refined, and the requirement of the ion source spray needle adjustment cannot be met.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a mass spectrometer electronic needle subassembly, includes the ion source cavity, the inside of ion source cavity sets up electronic needle fixed subassembly, the inside of electronic needle fixed subassembly has the needle slip endotheca through threaded connection, the outside of needle slip endotheca is provided with the needle slip overcoat, the outside of needle slip overcoat is provided with vertical position sensor, needle slip endotheca and needle slip overcoat are connected with two vertical direction springs, the surface fixedly connected with vertical direction adjustment seat of needle slip endotheca, the inner wall of vertical direction adjustment seat has the auto-lock through threaded connection to rotate the adjusting column, the below of vertical direction adjustment seat is provided with vertical direction thimble, the outside of needle slip overcoat is provided with vertical tensioning case fixing base, the surface mounting of vertical tensioning case fixing base has the motor fixing base, the upper surface mounting of motor fixing base has the second motor, the output shaft of second motor passes through the screw and installs the motor wrapping post, the surface mounting of vertical tensioning case fixing base has two pulley tensioning case covers, every pulley tensioning case cover all passes through the pulley tensioning screw and installs the line;

the high-voltage connector is welded on the upper surface of the electric spray needle fixing assembly, the first gas path connector is arranged in the electric spray needle sliding inner sleeve, the second gas path connector and the third gas path connector are arranged on the upper surface of the electric spray needle fixing assembly, the fourth gas path connector is arranged on the upper surface of the electric spray needle fixing assembly, the electric spray needle outer tube is arranged in the electric spray needle sliding inner sleeve, the motor fixing plate is fixedly connected to the outer surface of the ion source cavity, the first motor is arranged outside the motor fixing plate, the small bevel gear is fixedly connected to the output end of the first motor, the sliding needle fixing sliding table is arranged outside the electric spray needle fixing assembly, the sliding table bevel gear connecting piece is arranged outside the electric spray needle fixing sliding table, the sliding table guide rail is arranged outside the sliding table bevel gear connecting piece, the micro switch is arranged below the sliding table bevel gear connecting piece, the large bevel gear rotating shaft is fixedly connected to the large bevel gear through the fixing screw, the limiting shaft is arranged on the left side of the first motor, and the bevel gear is fixedly connected to the two bevel gear shaft sleeves through the fixing screw.

In a further embodiment, two vertical direction springs are symmetrically arranged, and each vertical direction spring adopts a tension spring.

In a further embodiment, the vertical position sensor is a resistive sensor, and an outer surface of the vertical position sensor is fixedly connected with an outer surface of the needle sliding sleeve.

In a further embodiment, the outer surface of the self-locking rotation adjustment column is provided with two grooves and two wire fixing positions.

In a further embodiment, an electrical needle connector is fixedly connected to the outer surface of the electrical needle fixing assembly.

In a further embodiment, a hole is provided in the middle of the electronic needle fixing assembly.

Compared with the prior art, the utility model has the beneficial effects that:

the device increases the needle angle adjustment on the basis of needle two-dimensional adjustment, solves the problem of fixed angles of a product needle and a mass spectrum interface in the market, sets the adjustment of three dimensions as electric adjustment, and has position feedback, solves a series of problems caused by manual adjustment, realizes automatic needle adjustment, can evaluate the relative ionization capacity of an ion source through software logic, and can realize closed-loop control optimizing by matching with a three-dimensional adjusting device with position feedback, intelligently find the needle pose with the optimal ionization efficiency of the ion source so as to realize the ion source tuning function, greatly reduces labor cost, simultaneously reduces manual judgment error, improves optimizing accuracy and realizes the intellectualization of ion source tuning.

Drawings

Fig. 1 is a schematic perspective view of an electronic needle fixing assembly of a mass spectrometer electronic needle assembly.

Fig. 2 is a schematic perspective view of a needle sliding inner sleeve of a mass spectrometer electronic needle assembly.

Fig. 3 is a schematic perspective view of a side cross-sectional view of a needle slide housing of a mass spectrometer electronic needle assembly.

Fig. 4 is a schematic perspective view of a large bevel gear of a mass spectrometer electrical needle assembly.

Fig. 5 is a schematic perspective view of a bevel gear bushing cross-sectional side view of a mass spectrometer electrical needle assembly.

In the figure: 1. an electronic needle fixing component; 2. a needle sliding inner sleeve; 3. a second motor; 4. a motor winding post; 5. a wiring pulley; 6. a motor fixing seat; 7. a vertical tensioning box fixing seat; 8. the pulley tightens the case cover; 9. an outer tube of the electric spray needle; 10. self-locking rotation adjusting column; 11. pulley tensioning screws; 12. a needle sliding outer sleeve; 13. a vertical direction adjusting seat; 14. a vertical thimble; 15. a vertical direction spring; 16. a vertical position sensor; 17. the air passage joint is IV; 18. the air passage joint III; 19. the gas circuit joint II; 20. the first gas circuit joint; 21. a high pressure junction; 22. the spray needle is fixed on the sliding table; 23. a slipway bevel gear connector; 24. a large bevel gear; 25. bevel pinion; 26. a motor fixing plate; 27. a first motor; 28. a limiting shaft; 29. a micro-switch; 30. a slipway guide rail; 31. bevel gear shaft; 32. bevel gear shaft sleeve; 33. bevel gear set screw; 34. an ion source chamber.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-5, in the utility model, an electronic needle assembly of a mass spectrometer comprises an ion source cavity 34, an electronic needle fixing assembly 1 is arranged in the ion source cavity 34, a needle sliding inner sleeve 2 is connected to the electronic needle fixing assembly 1 through threads, a needle sliding outer sleeve 12 is arranged on the outer side of the needle sliding inner sleeve 2, a vertical position sensor 16 is arranged on the outer side of the needle sliding outer sleeve 12, two vertical direction springs 15 are connected to the needle sliding inner sleeve 2 and the needle sliding outer sleeve 12, a vertical direction adjusting seat 13 is fixedly connected to the outer surface of the needle sliding inner sleeve 2, a self-locking rotation adjusting column 10 is connected to the inner wall of the vertical direction adjusting seat 13 through threads, a vertical direction thimble 14 is arranged below the vertical direction adjusting seat 13, a vertical tensioning box fixing seat 7 is arranged on the outer side of the needle sliding outer sleeve 12, a motor fixing seat 6 is arranged on the outer surface of the vertical tensioning box fixing seat 7, a second motor 3 is arranged on the upper surface of the motor fixing seat 6, a motor winding post 4 is arranged on the outer side of the output shaft of the second motor 3 through screws, two pulley tensioning box covers 8 are arranged on the outer surface of the vertical tensioning box fixing seat 7, and each pulley tensioning box cover 8 is provided with a pulley driving pulley bolt 11 through a pulley driving screw 11.

The high-voltage connector 21 is welded on the upper surface of the electric spray needle fixing assembly 1, the first gas path connector 20 is arranged inside the spray needle sliding inner sleeve 2, the second gas path connector 19 and the third gas path connector 18 are arranged on the upper surface of the electric spray needle fixing assembly 1, the fourth gas path connector 17 is arranged on the upper surface of the electric spray needle fixing assembly 1, the electric spray needle outer tube 9 is arranged inside the spray needle sliding inner sleeve 2, the motor fixing plate 26 is fixedly connected with the outer surface of the ion source cavity 34, the first motor 27 is arranged outside the motor fixing plate 26, the small bevel gear 25 is fixedly connected with the output end of the first motor 27, the sliding table bevel gear connecting piece 23 is arranged outside the electric spray needle fixing sliding table 22, the sliding table guide rail 30 is arranged outside the sliding table fixing sliding table 22, the micro switch 29 is arranged below the sliding table bevel gear connecting piece 23, the large bevel gear 24 is fixedly connected with the bevel gear rotating shaft 31 through the fixing screw 33, the limit shaft 28 is arranged on the left side of the first motor 27, and the bevel gear 32 is fixedly connected with the bevel gear shaft 32 through the fixing screw 33.

The two vertical direction springs 15 are symmetrically arranged, each vertical direction spring 15 adopts a tension spring, vertical downward force can be applied to the needle sliding inner sleeve 2, the vertical position sensor 16 adopts a resistance type sensor, the outer surface of the vertical position sensor 16 is fixedly connected with the outer surface of the needle sliding outer sleeve 12, and position feedback can be timely carried out.

The outer surface of the self-locking rotation adjusting column 10 is provided with two grooves and two steel wire fixing positions, so that a worker can conveniently install the steel wires, the outer surface of the electric spray needle fixing assembly 1 is fixedly connected with an electric spray needle connecting piece, the electric spray needle outer tube 9 can be quickly connected, and a hole is formed in the middle of the electric spray needle fixing assembly 1 to expose the position of the electric spray needle connecting piece for passing through a sample solution; the sample solution is introduced into the electric spray needle, and the auxiliary gas is introduced into the outer tube 9 of the electric spray needle, so that the spray gas can be sprayed.

The working principle of the utility model is as follows: the first motor 27 is fixedly connected to the ion source cavity 34 through a motor fixing plate 26, and the front of an output shaft of the first motor is fixedly connected with the bevel pinion 25 through a jackscrew; the large bevel gear 24 is fixedly connected with the bevel gear rotating shaft 31 through a bevel gear fixing screw 33, and can perform circular motion around two bevel gear shaft sleeves 32 which are fixedly connected on the ion source cavity 34 in an interference manner; one side of the sliding table bevel gear connecting piece 23 is fixedly connected with the large bevel gear 24, one side of the sliding table bevel gear connecting piece is fixedly connected with the needle fixing sliding table 22, further, the first motor 27 drives the small bevel gear 25 to rotate positively and negatively, the needle fixing sliding table 22 can be driven to rotate in a pitching mode along the sliding table guide rail 30 through meshing with the large bevel gear 24, when the rotating zero position is in a vertical gesture of a needle, the microswitch 29 is in a triggering state, the microswitch 29 can be at most tilted for 18 degrees, physical limiting is carried out through the limiting shaft 28, when ion source tuning is carried out, if the microswitch 29 is not in the triggering state, the first motor 27 is driven to enable the fixing sliding table to reversely move until the microswitch 29 is touched to be marked as the zero point, then, the encoder of the first motor 27 is used for carrying out real-time position feedback, closed loop control of needle angle adjustment movement is realized, the electronic needle fixing assembly 1 is connected with the needle sliding inner sleeve 2 through threads, and the needle sliding inner sleeve 2 and the needle sliding sleeve 12 can slide up and down; the vertical direction spring 15 connects the needle sliding inner sleeve 2 and the needle sliding outer sleeve 12, and applies vertical downward force to the needle sliding inner sleeve 2; the vertical direction adjusting seat 13 is fixedly connected to the needle sliding inner sleeve 2, and is connected with the self-locking rotation adjusting column 10 through threads with a thread rise angle smaller than 5 degrees, and the self-locking rotation adjusting column is always contacted with the vertical direction thimble 14 fixedly connected with the needle sliding outer sleeve 12 under the action of spring force borne by the needle sliding inner sleeve 2, so that the rotation self-locking rotation adjusting column 10 can drive the needle sliding inner sleeve 2 to move up and down relative to the vertical direction adjusting seat 13 under the action of threads, and further drive the needle sliding inner sleeve 2 to move up and down relative to the needle sliding outer sleeve 12, and the thread rise angle is smaller than a friction angle, so that the up-and-down sliding self-locking can be realized when the self-locking rotation adjusting column 10 is not rotated.

Meanwhile, the vertical position sensor 16 is a resistance sensor, the main body of the vertical position sensor is fixedly connected with the needle sliding outer sleeve 12, the movable rod of the vertical position sensor is fixedly connected with the needle sliding inner sleeve 2, and the resistance value of the vertical position sensor changes when the vertical position sensor and the needle sliding inner sleeve move to serve as position feedback; two grooves and two steel wire fixing positions are arranged on the self-locking rotation adjusting column 10, one steel wire is fixed at the steel wire fixing position (lower part) of the self-locking rotation adjusting column 10 and then is wound clockwise in the groove (lower part), then the position of the wire pulley 5 can be adjusted in the pulley tensioning box cover 8 through the tensioning of the wire pulley 5 by rotating the pulley tensioning screw 11, then the wire pulley 5 is fixed on the motor winding column 4 with the same rotation direction, and then the motor winding column 4 is fixed on the output shaft of the second motor 3 in a screw clamping mode, so that the second motor 3 rotates to drive the steel wire, and the self-locking rotation adjusting column 10 is pulled to rotate unidirectionally; the other side adopts the same mode, but the rotation directions are opposite, so that the reverse rotation of the second motor 3 drives the steel wire, and the self-locking rotation adjusting column 10 is pulled to perform reverse rotation; the electric spray needle is fixedly connected to the electric spray needle connecting piece, the outer electric spray needle outer tube 9 of the electric spray needle connecting piece is also fixedly connected to the electric spray needle connecting piece, the electric spray needle connecting piece is fixedly connected to the electric spray needle fixing assembly 1, a hole is formed in the middle of the electric spray needle fixing assembly 1, and the position of the electric spray needle connecting piece, which is communicated with the sample solution, is exposed; the electric spray needle is internally provided with a sample solution, the electric spray needle outer tube 9 is internally provided with auxiliary gas, the gas passes through the electric spray needle fixing component 1 through the gas circuit joint III 18 and the gas circuit joint II 19, and then is transmitted to the gas circuit joint I20 through a hose, and then is transmitted into the electric spray needle outer tube 9; the above together form a sample spray; the required high voltage is welded and connected to the high voltage feed contact through a high voltage connector 21 to carry out high voltage feed; electrospraying achieves ionization of sample molecules by constantly desolvating and coulomb explosion; and the air passage joint IV 17 is filled with nitrogen gas to provide a stable ionization environment.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims (6)

1. A mass spectrometer electronic needle assembly, characterized by: including ion source cavity (34), the inside of ion source cavity (34) sets up electric needle fixed subassembly (1), the inside of electric needle fixed subassembly (1) is through threaded connection has needle slip endotheca (2), the outside of needle slip endotheca (2) is provided with needle slip overcoat (12), the outside of needle slip overcoat (12) is provided with vertical position sensor (16), needle slip endotheca (2) and needle slip overcoat (12) are connected with two vertical direction springs (15), the surface mounting of needle slip endotheca (2) is connected with vertical direction adjustment seat (13), the inner wall of vertical direction adjustment seat (13) has auto-lock rotation adjusting column (10) through threaded connection, the below of vertical direction adjustment seat (13) is provided with vertical direction thimble (14), the outside of needle slip overcoat (12) is provided with vertical tensioning case fixing base (7), the surface mounting of vertical tensioning case fixing base (7) has motor fixing base (6), the motor surface mounting of motor (2) and needle slip endotheca (12) are connected with two vertical direction springs (15), the surface mounting of motor (3) and second output shaft (3) are installed through vertical screw cap (8), each pulley tensioning box cover (8) is provided with a wiring pulley (5) through a pulley tensioning screw (11);

the upper surface welding of electronic needle fixed subassembly (1) has high-pressure joint (21), the inside of needle slip endotheca (2) is provided with gas circuit joint one (20), the upper surface mounting of electronic needle fixed subassembly (1) has gas circuit joint two (19) and gas circuit joint three (18), the upper surface mounting of electronic needle fixed subassembly (1) has gas circuit joint four (17), the inside of needle slip endotheca (2) is provided with electronic needle outer tube (9), the surface fixedly connected with motor fixed plate (26) of ion source cavity (34), the outside of motor fixed plate (26) is provided with first motor (27), the output fixedly connected with bevel gear (25) of bevel gear (27), the outside of electronic needle fixed subassembly (1) is provided with needle fixed slip table (22), the outside of needle fixed slip table (22) is provided with slip table connecting piece (23), the outside of needle fixed slip table (22) is provided with slide rail (30), the outside of slip table connecting piece (23) is provided with bevel gear (24) and bevel gear (24) is connected with bevel gear (24) through bevel gear (31), the left side of first motor (27) is equipped with spacing axle (28), the outside interference fixedly connected with two bevel gear axle sleeves (32) of bevel gear pivot (31).

2. A mass spectrometer electrical needle assembly as defined in claim 1, wherein: the two vertical direction springs (15) are symmetrically arranged, and each vertical direction spring (15) adopts a tension spring.

3. A mass spectrometer electrical needle assembly as defined in claim 1, wherein: the vertical position sensor (16) adopts a resistance type sensor, and the outer surface of the vertical position sensor (16) is fixedly connected with the outer surface of the needle sliding sleeve (12).

4. A mass spectrometer electrical needle assembly as defined in claim 1, wherein: the outer surface of the self-locking rotation adjusting column (10) is provided with two grooves and two steel wire fixing positions.

5. A mass spectrometer electrical needle assembly as defined in claim 1, wherein: the outer surface of the electric spray needle fixing assembly (1) is fixedly connected with an electric spray needle connecting piece.

6. A mass spectrometer electrical needle assembly as defined in claim 1, wherein: and a hole is formed in the middle of the electric spray needle fixing assembly (1).