Mass spectrometer electrometer and signal amplification transmission method thereof

Abstract

The invention belongs to the field of manufacturing of isotope magnetic mass spectrometers in analytical instruments, and particularly relates to a mass spectrometer electrometer and a signal amplification and transmission method thereof. The mass spectrometer electrometer assembly comprises a terminal flange, a rear cover plate, a cylinder, an outer flange, a transition flange, an amplifier, a relay plate and a positioning column. The terminal flange leads a signal line into the cylinder and transmits the signal line to the amplifier, and the terminal on the relay plate leads the signal out of the cylinder and sends the signal to the acquisition card. The electrometer assembly is compact in structure, easy to assemble and firm in fixation, the defects that an amplifier and a relay plate of an existing mass spectrometer electrometer assembly are narrow in assembling space, not firm in connection and fixation and the like are overcome, the stability of the electrometer assembly is improved, and the service life of the electrometer assembly is prolonged; according to the provided signal amplification transmission method, the signal transmission path is simple, and the signal transmission quality is guaranteed.

Description

Technical Field

[0001] The invention belongs to the field of manufacturing isotope magnetic mass spectrometers in analytical instruments, and in particular relates to an electrometer for a mass spectrometer and a signal amplification and transmission method thereof. Background Art

[0002] The mass spectrometer uses the principle of separation of ions with different mass-to-charge ratios in an electromagnetic field to perform isotope separation, and then accurately measures the abundance and content of the separated isotopes or different elements based on the strength of the received ion signal; the electrometer is the core component of the mass spectrometer to achieve precise detection of different substances to be tested. The mass spectrometer electrometer is mainly composed of a cylinder, an amplifier, a relay board, a transition flange, a terminal flange, and a rear cover. An amplifier is connected to a signal terminal, and the parts are connected and fixed by positioning grooves and screws. The ion electrical signal will be transmitted to the amplifier through the signal terminal, and then transmitted to the acquisition card through the data line.

[0003] Usually, three support rods are installed on the transition flange of the mass spectrometer electrometer, and a relay board is installed at the end of the support rod, and then each amplifier is plugged into the interface of the relay board; the terminal flange and the amplifier are connected by wires and copper connectors, and the electrical signal is transmitted to the signal acquisition card through the relay board. Although such a structure can realize signal acquisition and transmission, in order to facilitate the connection between the terminal flange and the amplifier, the amplifier needs to be installed between the three support columns. Due to the limitation of the assembly space, the amplifier is only supported by the plug-in terminal, which is prone to virtual connection and disconnection; during the assembly of the amplifier, the deformation tension of the wires can easily cause short circuits and disconnections in the amplifier connection, increase the frequency and cost of inspection and maintenance, reduce the service life of the amplifier and the relay board, and affect the effect of signal amplification and transmission. Summary of the invention

[0004] In view of the defects of existing mass spectrometer electrometers such as small assembly space for amplifiers and relay boards, loose connections, easy short circuits and open circuits, and damaged signal transmission quality, the present invention provides a mass spectrometer electrometer that can achieve the same functions and has a compact structure, simple assembly, and reliable fixation, and provides a signal amplification and transmission method thereof, which provides certain technical support for the expansion of research and development of new mass spectrometers.

[0005] The technical solution of this application is as follows:

[0006] The embodiment of the present application provides a mass spectrometer electrometer, including a terminal flange, a rear cover plate, a barrel, an outer flange a, an outer flange b, a transition flange, an amplifier, a relay plate, and a positioning column;

[0007] The amplifier, relay board and positioning column are assembled inside the cylinder;

[0008] The relay plate is a circular plate, the size of which matches that of the cylinder, and is fixed at the position near the end of the cylinder;

[0009] The bottom surface of the positioning column is fixed to the center of the relay board;

[0010] The outer flange a and the outer flange b are respectively located on both sides of the cylinder (5); one side of the outer flange a is connected to the cylinder, and the other side is connected to the terminal flange through a transition flange; one side of the outer flange b is connected to the cylinder, and the other side is connected to the rear cover plate to seal the cylinder.

[0011] The amplifier consists of blades evenly spaced along the axis, each blade having a terminal a.

[0012] The positioning column (12) is provided with limiting grooves evenly distributed along its cylindrical surface, and is assembled with the amplifier through the limiting grooves; the number of the limiting grooves is consistent with the number of the amplifier blades;

[0013] The positioning column is provided with a threaded hole extending along the length thereof and for the bolt to pass through, and the positioning column is connected to the fixing plate through the bolt.

[0014] Terminal b is arranged on the relay board, and terminal connector is arranged on the terminal b; the number of the terminals b is consistent with the number of the amplifier blades; and terminal c is arranged on the edge of the relay board.

[0015] The mass spectrometer electrometer also includes three sealing gaskets: sealing gasket a, sealing gasket b and sealing gasket c. The sealing gasket a and sealing gasket b are respectively located on both sides of the transition flange; and the sealing gasket c is located between the rear cover plate and the outer flange b.

[0016] The wall of the cylinder is provided with an evacuation hole for assembling the KF flange, and a square groove is provided below the evacuation hole to lead the terminal c out of the cylinder.

[0017] The KF flange is connected to a vacuum bellows to achieve vacuum inside the cylinder.

[0018] The present application provides a method for amplifying and transmitting a signal of an electrometer of a mass spectrometer, comprising the following steps:

[0019] The terminal flange introduces the signal line into the barrel and transmits it to the amplifier through the terminal connector for signal amplification;

[0020] The terminal connector receives the amplified signal and transmits it to the connection terminal c;

[0021] The signal line extends outside the cylinder through end c and transmits the signal to the acquisition card.

[0022] As one of the possible implementations, bidirectional signal transmission between the middle terminal connector and the amplifier is achieved by contacting and matching the terminal a on the amplifier with the terminal b on the relay board.

[0023] As one of the possible implementation methods, each terminal connector transmits one signal separately. By increasing the number of terminal connectors and setting the same number of terminals b, terminals a and amplifier blades, multiple signals can be amplified and transmitted simultaneously.

[0024] The present invention provides a mass spectrometer electrometer and a signal amplification and transmission method thereof. The mass spectrometer electrometer structure is distributed and assembled along the axial direction, and the cylinder is sleeved on the outside of the amplifier, the relay board and the positioning column, so as to reasonably utilize the assembly space, solve the problem of narrow assembly space of the existing mass spectrometer amplifier and the relay board, and simplify the assembly process and assembly reliability of the amplifier; the cylinder, the relay board and the positioning column can be fixed by welding, and the amplifier is fixed in the cylinder by the positioning column limit groove, and the various components are fixedly connected, so as to solve the defects of the existing mass spectrometer electrometer such as loose connection and easy short circuit and open circuit; the signal transmission process of the mass spectrometer electrometer is simple, and the cylinder can shield electromagnetic influence; each terminal connector can transmit one signal separately, which improves the stability and service life of the mass spectrometer electrometer, reduces the instrument failure rate and maintenance difficulty, improves the signal transmission quality, and saves a lot of later maintenance costs compared with the existing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a schematic diagram of the structure of the electrometer of the mass spectrometer;

[0027] Figure 2 It is a schematic diagram of the cylinder structure;

[0028] Figure 3 It is a schematic diagram of the positioning column structure;

[0029] Figure 4 It is a schematic diagram of the relay board structure;

[0030] Figure 5 This is a schematic diagram of the assembly of the cylinder and amplifier;

[0031] Figure markings: 1-terminal flange; 2-sealing gasket a; 3-rear cover; 4-sealing gasket b; 5-cylinder; 6-outer flange a; 7-transition flange; 8-amplifier; 9-fixing plate; 10-bolt; 11-relay plate; 12-positioning column; 13-limiting groove; 14-KF flange; 15-terminal a; 16-terminal b; 17-terminal c; 18-evacuation hole; 19-threaded hole; 20-terminal connector; 21-outer flange b; 22-sealing gasket c. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0034] In the description of the embodiments of the present application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] A mass spectrometer electrometer provided in the embodiment of the present application, see Figure 1 , including a terminal flange 1, a rear cover plate 3, a barrel 5, an outer flange a6, an outer flange b21, a transition flange 7, an amplifier 8, a relay board 11 and a positioning column 12.

[0036] The outer flange a6 and the outer flange b21 are respectively located on both sides of the cylinder 5;

[0037] One side of the outer flange a6 is connected to the cylinder 5, and the other side is connected to the terminal flange 1 through the transition flange 7. The sealing gasket a2 and the sealing gasket b4 are placed on both sides of the transition flange 7, so that the overall connection is in a sealed state;

[0038] One side of the outer flange b21 is connected to the cylinder 5 , and the other side is connected to the rear cover plate 3 and the sealing gasket c22 to seal the cylinder 5 .

[0039] The amplifier 8 comprises blades evenly distributed along the axis, each blade has a terminal a15, and the number of blades of the amplifier 8 can be set to 1 to 8. Preferably, the number of blades of the amplifier 8 is set to 6.

[0040] like Figure 2 As shown, a vacuum hole 18 is provided on the wall of the cylinder 5, and a square groove is provided below the vacuum hole 18.

[0041] Optionally, the cylinder 5 is made of 304 stainless steel, which can eliminate electromagnetic influence.

[0042] like Figure 3 As shown, the positioning column 12 is provided with 6 limiting grooves 13 evenly distributed along its cylindrical surface;

[0043] The positioning column 12 is provided with a threaded hole 19 extending along the length thereof.

[0044] like Figure 4 As shown, the relay board 11 is a circular board, and six terminals b16 are arranged on the relay board 11 . Each terminal b16 is provided with a terminal connector 20 . A terminal c17 is arranged on the edge of the relay board 11 .

[0045] The following describes in detail the assembly process of a mass spectrometer electrometer provided in an embodiment of the present application with reference to a specific example.

[0046] In the specific implementation, first assemble the amplifier 8 and the barrel 5, see Figure 5 ;

[0047] The size of the relay plate 11 is adapted to the cylinder 5. The relay plate 11 is placed near the end of the cylinder 5. The terminal c17 on the edge thereof is led out of the cylinder 5 through the square groove opened below the evacuation hole 18.

[0048] Optionally, the relay plate 11 is fixed to the cylinder 5 by welding;

[0049] The bottom surface of the positioning column 12 is welded and fixed to the center of the relay board 11, and is assembled one-to-one with the six blades of the amplifier 8 through the six limiting grooves 13 on the surface of the positioning column 12;

[0050] It can be understood that during the process of limiting and fixing the amplifier 8 and the positioning column 12, when the amplifier 8 is pushed to the bottom, the six terminals a15 at the bottom of the amplifier 8 form contact and fit with the six terminals b16 on the relay board 11;

[0051] The fixing plate 9 is placed on the positioning column 12 , and the bolts 10 are passed through the threaded holes 19 to tighten the connection between the amplifier 8 and the positioning column 12 , thereby assembling the amplifier 8 in the cylinder 5 .

[0052] In the specific implementation, after the amplifier 8 and the barrel 5 are assembled, the external connection components of the barrel 5 are assembled;

[0053] Weld the outer flange a6 and the outer flange b21 to the two ends of the cylinder 5 respectively;

[0054] The gasket 4 is placed outside the outer flange a6, and the transition flange 7 and the outer flange a6 are assembled and fixed by bolts;

[0055] The sealing gasket a2 is assembled in the sealing groove on the transition flange 7;

[0056] Assemble and fix the terminal flange 1 and the transition flange 7 by bolts;

[0057] The sealing gasket c22 is assembled on the outer flange b21, and the rear cover plate 3 and the outer flange b21 are fixed by bolts;

[0058] The KF flange 14 is mounted on the outside of the evacuation hole 18 on the wall of the cylinder 5; the evacuation bellows is connected to the electrometer of the mass spectrometer through the KF flange 14;

[0059] Connect the data cable of the acquisition card to terminal c17 to complete the entire assembly work.

[0060] A method for amplifying and transmitting a mass spectrometer electrometer signal provided in an embodiment of the present application includes the following steps:

[0061] The terminal flange 1 introduces the signal line into the barrel 5, and transmits the 6-way signal to the amplifier 8 through the 6 terminal connectors 20, and the 6-way signal is amplified and processed simultaneously;

[0062] The amplified signal is received by the six terminal connectors 20 and transmitted to the connection terminal c17 in real time;

[0063] The signal line extends to the outside of the cylinder 5 through the terminal c17 to transmit the signal to the acquisition card.

[0064] The present application provides a mass spectrometer electrometer and a signal amplification and transmission method thereof, the effects of which are as follows:

[0065] (1) The structure of the mass spectrometer electrometer is distributed along the axial direction and assembled around the cylinder. The cylinder is sleeved on the outside of the amplifier, relay board and positioning column, which makes rational use of the assembly space, solves the problem of small assembly space of the existing mass spectrometer amplifier and relay board, and simplifies the amplifier assembly process and assembly reliability;

[0066] (2) The cylinder, relay plate and positioning column can be fixed by welding, the amplifier is fixed in the cylinder through the positioning column limit groove, and the connection with the positioning column is fastened by bolts and fixing plates, which solves the defects of the existing mass spectrometer electrometer being loosely connected and easily short-circuited and broken, and improves the stability of signal transmission;

[0067] (3) The mass spectrometer electrometer and the signal amplification and transmission method thereof provided in this embodiment have a simple signal transmission path. Optionally, the cylinder 5 is made of 304 stainless steel, which can shield electromagnetic influences;

[0068] (4) By changing the number of terminal connectors, amplifier blades and other components, multi-channel signal transmission is achieved. Each terminal connector transmits one signal separately, which improves the stability and service life of the mass spectrometer electrometer, reduces the instrument failure rate and maintenance difficulty, and saves a lot of subsequent maintenance costs compared to existing technologies.

[0069] It should be noted that, for the above-mentioned method embodiments, for the sake of simplicity of description, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described action sequence, because according to the present application, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0070] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0071] The preferred embodiments of the present application disclosed above are only used to help explain the present application. The optional embodiments do not describe all the details in detail, nor do they limit the present application to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of the present application. The present application selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present application, so that those skilled in the art can understand and use the present application well.

Claims

1. A mass spectrometer electrometer, characterized in that It comprises a terminal flange (1), a rear cover plate (3), a barrel (5), an outer flange a (6), an outer flange b (21), a transition flange (7), an amplifier (8), a relay plate (11) and a positioning column (12); The amplifier (8), the relay board (11) and the positioning column (12) are assembled inside the cylinder (5); the relay board (11) is a circular plate, the size of which is adapted to the cylinder (5) and is fixed at the position near the end of the cylinder (5); the bottom surface of the positioning column (12) is fixed at the center of the relay board (11); The outer flange a (6) and the outer flange b (21) are respectively located on both sides of the cylinder (5); one side of the outer flange a (6) is connected to the cylinder (5), and the other side is connected to the terminal flange (1) through the transition flange (7); one side of the outer flange b (21) is connected to the cylinder (5), and the other side is connected to the rear cover plate (3) to seal the cylinder (5).

2. A mass spectrometer electrometer according to claim 1, characterized in that: The amplifier (8) comprises blades evenly distributed along the axis, each blade having a terminal a (15).

3. A mass spectrometer electrometer according to claim 1, characterized in that: The positioning column (12) is provided with limiting grooves (13) evenly distributed along its cylindrical surface, and is assembled with the amplifier (8) through the limiting grooves (13); the number of the limiting grooves (13) is consistent with the number of blades of the amplifier (8); The positioning column (12) is provided with a threaded hole (19) extending along its length and for the bolt (10) to pass through. The positioning column (12) is connected to the fixing plate (9) via the bolt (10).

4. A mass spectrometer electrometer according to claim 1, characterized in that: The relay board (11) is provided with a terminal b (16), and the terminal b (16) is provided with a terminal connector (20); the number of the terminals b (16) is consistent with the number of blades of the amplifier (8); and the edge of the relay board (11) is provided with a terminal c (17).

5. A mass spectrometer electrometer according to claim 1, characterized in that: It also includes three sealing gaskets for sealing: sealing gasket a (2), sealing gasket b (4) and sealing gasket c (22); sealing gasket a (2) and sealing gasket b (4) are respectively located on both sides of the transition flange (7); and sealing gasket c (22) is located between the rear cover plate (3) and the outer flange b (21).

6. A mass spectrometer electrometer according to claim 1, characterized in that: The wall surface of the cylinder (5) is provided with an evacuation hole (18) for assembling the KF flange (14), and a square groove for leading the terminal c (17) out of the cylinder (5) is provided below the evacuation hole (18).

7. A mass spectrometer electrometer according to claim 6, characterized in that: The KF flange (14) is externally connected to a vacuum bellows to achieve vacuuming inside the cylinder (5).

8. A mass spectrometer electrometer according to claim 2, characterized in that: The number of blades of the amplifier (8) can be selected from 1 to 8.

9. A signal amplification and transmission method for a mass spectrometer electrometer, characterized in that: The following steps are involved: The terminal flange (1) leads the signal line into the barrel (5), and transmits the signal to the amplifier (8) through the terminal connector (20) for signal amplification; The terminal connector (20) receives the amplified signal and transmits it to the connecting terminal c (17); The signal line extends to the outside of the cylinder (5) through the terminal c (17) to transmit the signal to the acquisition card.

10. The signal amplification and transmission method of a mass spectrometer electrometer according to claim 9, characterized in that: Bidirectional signal transmission between the middle terminal connector (20) and the amplifier (8) is achieved by the contact and matching of the terminal a (15) on the amplifier (8) and the terminal b (16) on the relay board (11).

11. The signal amplification and transmission method of a mass spectrometer electrometer according to claim 9, characterized in that: Each terminal connector (20) transmits one signal independently. By increasing the number of terminal connectors (20) and providing the same number of terminals b (16), terminals a (15) and amplifier (8) blades, multiple signals can be amplified and transmitted simultaneously.

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