Ion deflection device

Abstract

The utility model is applied to the technical field of mass spectrometry, and particularly relates to an ion deflection device which comprises a shell, a U-shaped channel is arranged in the shell, and openings communicated with the U-shaped channel are arranged at two ends of the shell; the first quadrupole rod is arranged in the U-shaped channel in a U shape, the two ends of the first quadrupole rod correspond to the openings in the two ends of the shell respectively, and the first quadrupole rod is connected with a first electrifying bolt; and the second quadrupole rod is arranged at the openings in the two ends of the shell, the ion channel of the second quadrupole rod is aligned with the ion channel of the first quadrupole rod, and the second quadrupole rod is connected with a second electrifying bolt. According to the device, the first quadrupole rod is connected with alternating current through the first electrifying bolt, the second quadrupole rod is connected with alternating current through the second electrifying bolt, and when ions enter an ion channel of the first quadrupole rod from the ions of the second quadrupole rod and finally reach a monitor, the ions are detected. And a linear cascading form is avoided, so that the overall size is smaller, and the occupied area is smaller.

Description

Technical Field

[0001] The utility model is used in the technical field of mass spectrum analysis, and particularly relates to an ion deflection device. Background Art

[0002] A mass spectrometer is an instrument for separating and detecting different isotopes. The main device of the instrument is placed in a vacuum. The substance is vaporized and ionized into an ion beam, which is accelerated and focused by voltage, and then passes through a magnetic field and electric field region, so that ions of different masses are focused at different positions, thereby obtaining the mass spectra of different isotopes.

[0003] Currently, the ion channels used in mass spectrometers are mainly in the form of linear cascades with a long length, which results in a relatively large size of the instrument and high difficulty in installation and debugging. Utility Model Content

[0004] In order to solve at least one of the above technical problems, the utility model provides an ion deflection device, and the technical solution adopted is as follows.

[0005] An ion deflection device comprising

[0006] A shell, wherein a U-shaped channel is provided inside the shell, and openings communicating with the U-shaped channel are provided at both ends of the shell;

[0007] A first quadrupole, wherein the first quadrupole is arranged in a U-shape in the U-shaped channel, two ends of the first quadrupole respectively correspond to openings at two ends of the housing, and a first energizing bolt is connected to the first quadrupole;

[0008] The second quadrupole is arranged at the openings at both ends of the shell, the ion channel of the second quadrupole is aligned with the ion channel of the first quadrupole, and the second quadrupole is connected with a second energizing bolt.

[0009] The ion deflection device according to the embodiment of the utility model has at least the following beneficial effects: during operation, an alternating current is connected to the first quadrupole through the first energized bolt, and an alternating current is connected to the second quadrupole through the second energized bolt. Under the action of the alternating current, when a group of ions with different mass-to-charge ratios enter the ion channel of the first quadrupole from the ion channel of the second quadrupole, only ions that meet specific conditions will oscillate stably and pass through the first quadrupole, and finally reach the monitor and be detected. Since the first quadrupole of this device adopts a U-shaped design, a linear cascade form is avoided, so the overall volume is smaller and the footprint is smaller.

[0010] According to some other embodiments of the ion deflection device of the present invention, the outer shell includes a shell and a U-shaped end plate, the U-shaped channel forms a U-shaped opening on one side of the shell, and the U-shaped end plate is installed at the U-shaped opening.

[0011] According to some other embodiments of the ion deflection device of the present invention, an air inlet hole is provided on the shell.

[0012] According to some other embodiments of the ion deflection device of the present utility model, a U-shaped sealing ring is arranged around the U-shaped opening, and the U-shaped sealing ring is pressed between the U-shaped end plate and the shell.

[0013] According to the ion deflection devices of some other embodiments of the present utility model, the openings are arranged at two ends of the shell, and fixing rings are arranged at both ends of the shell, and the fixing rings are aligned with the openings.

[0014] According to some other embodiments of the ion deflection device of the present invention, a first bolt channel is provided on the fixing ring, and the first energized bolt is passed through the first bolt channel and connected to the first quadrupole.

[0015] According to some other embodiments of the ion deflection device of the present invention, a sleeve is installed on the fixing ring, and the second quadrupole is inserted into the sleeve and fixed by the second energized bolt.

[0016] According to some other embodiments of the ion deflection device of the present invention, a second bolt channel is provided on the sleeve, and the second energized bolt is passed through the second bolt channel and connected to the second quadrupole.

[0017] According to the ion deflection device of some other embodiments of the present invention, a lens is provided between the sleeve and the fixing ring, and a through hole is provided on the lens, and the through hole is aligned with the ion channel of the first quadrupole and the ion channel of the second quadrupole.

[0018] According to the ion deflection device of some other embodiments of the present invention, a sealing ring is provided between the lens and the fixing ring.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 It is a schematic diagram of an embodiment of the utility model;

[0022] Figure 2 It is a schematic diagram of another viewing angle of an embodiment of the utility model;

[0023] Figure 3It is a partial structural schematic diagram of an embodiment of the utility model;

[0024] Figure 4 It is a partial structural schematic diagram of an embodiment of the utility model;

[0025] Figure 5 It is a structural schematic diagram of a shell in one embodiment of the utility model.

[0026] Figure markings: 100, outer shell; 110, shell; 111, U-shaped channel; 112, U-shaped opening; 113, air inlet; 114, U-shaped groove; 115, fixing ring; 116, first bolt channel; 117, U-shaped sealing ring; 120, U-shaped end plate; 200, first quadrupole; 300, second quadrupole; 400, first power-on bolt; 500, second power-on bolt; 600, fixing piece; 700, sleeve; 701, annular plate; 702, sealing ring; 800, lens. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the concept and technical effects of the utility model in combination with the embodiments, so as to fully understand the purpose, features and effects of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the utility model.

[0028] In the description of the embodiments of the present invention, if orientation descriptions are involved, the orientations or positional relationships indicated by “up”, “down”, “front”, “back”, “left”, “right”, etc. are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0029] In the description of the embodiments of the present utility model, if a feature is referred to as being "set", "fixed", "connected", or "installed" on another feature, it may be directly set, fixed, or connected on the other feature, or it may be indirectly set, fixed, connected, or installed on the other feature. In the description of the embodiments of the present utility model, if "several" is involved, it means more than one, if "multiple" is involved, it means more than two, if "greater than", "less than", or "exceeds" is involved, it should be understood as not including the number itself, and if "above", "below", or "within" is involved, it should be understood as including the number itself. If "first" or "second" is involved, it should be understood as being used to distinguish technical features, and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0030] A mass spectrometer is an instrument for separating and detecting different isotopes. The main device of the instrument is placed in a vacuum. The substance is vaporized and ionized into an ion beam, which is accelerated and focused by voltage, and then passes through a magnetic field and electric field region, so that ions of different masses are focused at different positions, thereby obtaining the mass spectra of different isotopes.

[0031] Currently, the ion channels used in mass spectrometers are mainly in the form of linear cascades with a long length, which results in a relatively large size of the instrument and high difficulty in installation and debugging.

[0032] See also Figures 1 to 5 The utility model provides an ion deflection device, including a shell 100, a first quadrupole 200 and a second quadrupole 300. A U-shaped channel 111 is arranged inside the shell 100, and openings connected to the U-shaped channel 111 are arranged at both ends of the shell 100. The first quadrupole 200 is arranged in a U shape in the U-shaped channel 111, and the two ends of the first quadrupole 200 correspond to the openings at both ends of the shell 100 respectively. The first quadrupole 200 is connected to a first power-on bolt 400, and the second quadrupole 300 is arranged at the openings at both ends of the shell 100. The ion channel of the second quadrupole 300 is aligned with the ion channel of the first quadrupole 200, and the second quadrupole 300 is connected to a second power-on bolt 500.

[0033] During operation, an alternating current is connected to the first quadrupole 200 through the first power-on bolt 400, and an alternating current is connected to the second quadrupole 300 through the second power-on bolt 500. Under the action of the alternating current, when a group of ions with different mass-to-charge ratios enter the ion channel of the first quadrupole 200 from the ion channel of the second quadrupole 300, only ions that meet specific conditions will oscillate stably and pass through the first quadrupole 200, and finally reach the monitor and be detected. Since the first quadrupole 200 of this device adopts a U-shaped design, a linear cascade form is avoided, so the overall volume is smaller and the footprint is smaller.

[0034] The first quadrupole 200 includes four U-shaped rods, which are fixed in the U-shaped channel 111 by the fixing member 600. Two second quadrupoles 300 are provided, and each second quadrupole 300 includes four straight rods, which are arranged at the openings at both ends of the housing 100, and the ends of the four straight rods are aligned one by one with the ends of the four U-shaped rods.

[0035] In some embodiments, the housing 100 includes a shell 110 and a U-shaped end plate 120 , the U-shaped channel 111 forms a U-shaped opening 112 at one side of the shell 110 , and the U-shaped end plate 120 is installed at the U-shaped opening 112 .

[0036] Specifically, a U-shaped channel 111 is provided inside the shell 110 , openings are provided at both ends of the shell 110 , and the openings at both ends of the shell 110 are communicated with the U-shaped channel 111 , and the middle part of the first quadrupole 200 is fixed in the U-shaped channel 111 through a fixing member 600 .

[0037] The U-shaped opening 112 is arranged on the top of the shell 110, and the U-shaped opening 112 is communicated with the U-shaped channel 111 inside the shell 110. The U-shaped end plate 120 is larger than the U-shaped opening 112. Bolt holes are arranged on the edge of the U-shaped end plate 120. The end face of the shell 110 on one side of which the U-shaped opening 112 is provided with a plurality of bolt holes, and each bolt hole surrounds the U-shaped opening 112. The bolt holes on the U-shaped end plate 120 are aligned with the bolt holes on the shell 110, and then the bolts are connected to the bolt holes on the U-shaped end plate 120 and the bolt holes on the shell 110, so that the U-shaped end plate 120 is fixed on the shell 110 to close the U-shaped opening 112.

[0038] In some embodiments, an air inlet 113 is disposed on the housing 110 .

[0039] Specifically, the air inlet 113 is disposed at the bottom of the housing 110 . During use, nitrogen is introduced into the U-shaped channel 111 through the air inlet 113 . The nitrogen is used for collision-induced separation of selected parent ions from the mass selector, thereby improving screening efficiency.

[0040] Since nitrogen needs to be introduced into the U-shaped channel 111 , in order to improve the sealing performance of the U-shaped channel 111 , in some embodiments, a U-shaped sealing ring 117 is disposed around the U-shaped opening 112 , and the U-shaped sealing ring 117 is pressed between the U-shaped end plate 120 and the shell 110 .

[0041] Specifically, the outer ring of the U-shaped opening 112 is provided with a U-shaped groove 114, and the U-shaped sealing ring 117 is assembled in the U-shaped groove 114, and the U-shaped sealing ring 117 is higher than the end face of the shell 110. After the U-shaped end plate 120 is installed on the shell 110, the U-shaped end plate 120 will be pressed against the U-shaped sealing ring 117, thereby achieving sealing and effectively preventing gas from leaking out from between the U-shaped end plate 120 and the shell 110.

[0042] In some embodiments, openings are provided at both ends of the housing 110 , and fixing rings 115 are provided at both ends of the housing 110 , and the fixing rings 115 are aligned with the openings.

[0043] Specifically, the fixing ring 115 is a circular ring structure disposed at both ends of the housing 110 . The inner diameter of the fixing ring 115 is the same as the diameter of the openings at both ends of the housing 110 . Both ends of the first quadrupole 200 are inserted into the fixing ring 115 of the housing 110 .

[0044] In some other embodiments, a first bolt channel 116 is provided on the fixing ring 115 , and the first energizing bolt 400 is passed through the first bolt channel 116 and connected to the first quadrupole 200 .

[0045] Specifically, the fixing ring 115 is provided with four first bolt channels 116 corresponding to the first quadrupole 200, and a first power-on bolt 400 is respectively passed through the four first bolt channels 116, and the four first power-on bolts 400 respectively pass through the first bolt channels 116 and are threadedly connected to the four U-shaped rods of the first quadrupole 200. The first power-on bolts 400 play a role in connecting the current on the one hand, and also play a role in fixing the first quadrupole 200 on the other hand, so that the first quadrupole 200 is more firmly installed inside the housing 110.

[0046] In some embodiments, a sleeve 700 is installed on the fixing ring 115 , and the second quadrupole 300 is inserted into the sleeve 700 .

[0047] Specifically, an annular plate 701 is provided on the outer periphery of one end of the sleeve 700 near the fixed ring 115, the outer diameter of the annular plate 701 is the same as the outer diameter of the fixed ring 115, a plurality of channels are circumferentially spaced apart on the annular plate 701, a plurality of threaded holes are circumferentially spaced apart on the fixed ring 115, the channels on the annular plate 701 are aligned with the threaded holes on the fixed ring 115, and then bolts are passed through the channels on the annular plate 701 and threadedly connected to the fixed ring 115, so that the sleeve 700 is fixed on the fixed ring 115, the inner diameter of the sleeve 700 is the same as the inner diameter of the fixed ring 115, and the second quadrupole 300 is inserted into the sleeve 700 and fixed by the second energized bolt 500.

[0048] In some embodiments, a second bolt channel is provided on the sleeve 700 , and the second energized bolt 500 passes through the second bolt channel and is connected to the second quadrupole 300 .

[0049] Specifically, four second bolt channels are formed on the sleeve 700 , and a second power-on bolt 500 is passed through each second bolt channel. After passing through the second bolt channels, the four second power-on bolts 500 are threadedly connected to the four straight rods of the second quadrupole 300 .

[0050] In some embodiments, a lens 800 is disposed between the sleeve 700 and the fixing ring 115 . A through hole is disposed on the lens 800 , and the through hole is aligned with the ion channel of the first quadrupole 200 and the ion channel of the second quadrupole 300 .

[0051] Specifically, the lens 800 is fixed between the annular plate 701 of the sleeve 700 and the fixing ring 115 by bolts. A through hole is provided in the middle of the lens 800, and the through hole is aligned with the ion channel of the first quadrupole 200 and the ion channel of the second quadrupole 300. During operation, a potential difference is formed between the second quadrupole 300 and the lens 800. Under the action of the potential difference, the charged ions entering the ion channel of the second quadrupole 300 are accelerated to pass through the through hole on the lens 800. After the charged ions pass through the through hole on the lens 800, since a potential difference is also formed between the lens 800 and the first quadrupole 200, the charged ions are also accelerated to enter the ion channel of the first quadrupole 200, thereby improving the passage efficiency of ions between the second quadrupole 300 and the first quadrupole 200.

[0052] In some embodiments, a sealing ring 702 is disposed between the lens 800 and the fixing ring 115 to prevent the gas in the U-shaped channel 111 from flowing out from the matching gap between the lens 800 and the fixing ring 115 .

[0053] The embodiments of the utility model are described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the technical field without departing from the purpose of the utility model. In addition, the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

Claims

1. An ion deflection device, characterized in that: include A housing (100), wherein a U-shaped channel (111) is provided inside the housing (100), and openings communicating with the U-shaped channel (111) are provided at both ends of the housing (100); A first quadrupole (200), the first quadrupole (200) being arranged in a U-shape in the U-shaped channel (111), two ends of the first quadrupole (200) respectively corresponding to openings at two ends of the housing (100), and a first power-on bolt (400) being connected to the first quadrupole (200); A second quadrupole (300), wherein the second quadrupole (300) is arranged at openings at both ends of the housing (100), the ion channel of the second quadrupole (300) is aligned with the ion channel of the first quadrupole (200), and a second energizing bolt (500) is connected to the second quadrupole (300).

2. The ion deflection device according to claim 1, characterized in that: The housing (100) comprises a shell (110) and a U-shaped end plate (120); the U-shaped channel (111) forms a U-shaped opening (112) on one side of the shell (110); and the U-shaped end plate (120) is installed at the U-shaped opening (112).

3. The ion deflection device according to claim 2, characterized in that: The housing (110) is provided with an air inlet hole (113).

4. The ion deflection device according to claim 3, characterized in that: A U-shaped sealing ring (117) is arranged around the U-shaped opening (112), and the U-shaped sealing ring (117) is pressed tightly between the U-shaped end plate (120) and the housing (110).

5. The ion deflection device according to claim 2, characterized in that: The openings are arranged at two ends of the shell (110), and fixing rings (115) are arranged at two ends of the shell (110), and the fixing rings (115) are aligned with the openings.

6. The ion deflection device according to claim 5, characterized in that: The fixing ring (115) is provided with a first bolt channel (116), and the first power-on bolt (400) is passed through the first bolt channel (116) and connected to the first quadrupole (200).

7. The ion deflection device according to claim 5, characterized in that: A sleeve (700) is installed on the fixing ring (115), and the second quadrupole (300) is inserted into the sleeve (700) and fixed by the second power-on bolt (500).

8. The ion deflection device according to claim 7, characterized in that: The sleeve (700) is provided with a second bolt channel, and the second energizing bolt (500) is inserted into the second bolt channel and connected to the second quadrupole (300).

9. The ion deflection device according to claim 7, characterized in that: A lens (800) is provided between the sleeve (700) and the fixing ring (115), and a through hole is provided on the lens (800), and the through hole is aligned with the ion channel of the first quadrupole (200) and the ion channel of the second quadrupole (300).

10. The ion deflection device according to claim 9, characterized in that: A sealing ring (702) is provided between the lens (800) and the fixing ring (115).

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