Sample filament degassing device suitable for thermal ionization mass spectrometer

Abstract

The utility model provides a sample filament degassing device suitable for a thermal ionization mass spectrometer, and relates to the technical field of filament degassing, the sample filament degassing device comprises an electric heating body, the surface of the electric heating body is sleeved with a detachable filament support, the filament support is internally provided with sixty degassing grooves for accommodating sample filaments, and the degassing grooves are communicated with the electric heating body. Sealing plates for sealing the degassing tank are arranged at the two ends of the degassing tank. The utility model has the advantages that the lamp filament bracket which can be disassembled and assembled is arranged in the vacuum cavity, the sixty degassing grooves for accommodating sample lamp filaments are formed in the lamp filament bracket, and meanwhile, the clamping plate and the electric heating body which can be telescopically adjusted are arranged for fixing and heating the lamp filament bracket; the positions of the clamping plates can be adjusted according to requirements so that the lamp filament support can be conveniently disassembled and assembled, sixty sample lamp filaments can be degassed at a time through the degassing groove, large-batch sample lamp filaments can be degassed conveniently, the working efficiency is improved, and use of the lamp filament degassing device is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of filament degassing technology, and in particular to a filament degassing device suitable for thermal ionization mass spectrometry samples. Background Technology

[0002] Before conducting sample tests or detections with a thermal ionization mass spectrometer, the sample filament must be kept clean and placed in a vacuum chamber to degas the sample filament (rhenium ribbon). A degassing device is required for vacuum degassing of the sample filament.

[0003] However, existing degassing devices can only degas a small number of sample filaments at a time, which is not conducive to large-scale degassing of sample filaments and results in low working efficiency. Utility Model Content

[0004] Therefore, the purpose of this utility model is to propose a sample filament degassing device suitable for thermal ionization mass spectrometers, so as to solve the problems mentioned in the background art and overcome the shortcomings of the existing technology.

[0005] To achieve the above objectives, one embodiment of this utility model provides a sample filament degassing device suitable for a thermal ionization mass spectrometer, comprising a vacuum chamber for evacuating the filament, a vacuum pump for evacuating the vacuum chamber fixedly installed at the bottom of the vacuum chamber, clamping plates for driving fixedly installed at both ends of the vacuum chamber, an electric heating element fixedly installed at one end of the clamping plate, a detachable filament support sleeved on the surface of the electric heating element, sixty degassing grooves for accommodating sample filaments opened inside the filament support, sealing plates for sealing the degassing grooves at both ends of the degassing grooves, a main control unit connected to the sealing plate, a pressure sensor for detecting the internal pressure of the vacuum chamber connected to the main control unit, a sealing end cap for sealing the vacuum chamber in the middle of the vacuum chamber, and locking plates for fastening the sealing end cap on both sides of the sealing end cap.

[0006] Preferably, in any of the above embodiments, the vacuum chamber is provided with vertical supports placed on the ground at both ends to support the vacuum chamber, the vacuum pump is fixedly installed inside the vertical supports, and the vacuum chamber is provided with a vacuum cavity to accommodate the clamping plate and the filament support.

[0007] The above technical solution involves using a vertical support to support the vacuum chamber, and using a vacuum pump to extract the gas inside the vacuum chamber to create a vacuum environment, allowing the sample filament to undergo degassing within the vacuum chamber.

[0008] Preferably, in any of the above embodiments, the clamping plate includes a drive cylinder driven by a pneumatic system and signal-connected to the main control unit, and a clamping plate that moves inside the vacuum chamber. The drive cylinder is fixedly installed at both ends of the vacuum chamber, and the output end of the drive cylinder is fixedly installed with the clamping plate. The electric heating element is fixedly installed at one end of the clamping plate, and the electric heating element is signal-connected to the main control unit.

[0009] Using the above technical solution: the filament holder filled with sample filaments is placed in the center of the vacuum chamber, and the drive cylinder is controlled to extend and retract to move the clamping plate closer to the filament holder, so that the clamping plate drives the electric heating element and the filament holder to engage. The clamping plate clamps the filament holder inside the vacuum chamber, and the gas inside the filament holder can be extracted during the vacuuming process.

[0010] Preferably, in any of the above embodiments, the filament support has a slot in the middle that engages with the electric heating element, the diameter of the filament support is smaller than the diameter of the clamping plate, the diameter of the clamping plate is smaller than the diameter of the vacuum chamber, the two ends of the filament support have movable slots for accommodating the sealing plate, the pressure sensor is located between the clamping plate and the inner wall of the vacuum chamber, and the pressure sensor is fixedly installed at the end of the vacuum chamber away from the vacuum pump.

[0011] The above technical solution is adopted: the filament support is made of thermally conductive material. After the electric heating element is inserted into the filament support, the electric heating element can be controlled to heat and transfer the heat through the filament support to the inside of the degassing tank to heat the sample filament inside the degassing tank. At the same time, during the vacuuming process of the vacuum chamber, the pressure sensor detects the pressure inside the vacuum chamber in real time and controls the sealing plate according to the detected pressure value.

[0012] Preferably, in any of the above embodiments, the sealing plate includes an electric telescopic rod that is signal-connected to the main control unit and an airtight plate that seals the degassing groove. The electric telescopic rod is fixedly installed inside the filament support, and an airtight plate that is movably connected to the filament support is fixedly installed at one end of the electric telescopic rod. The area of ​​the airtight plate is larger than the end face area of ​​the degassing groove.

[0013] The above technical solution is adopted as follows: when the air pressure inside the vacuum chamber is detected by the air pressure sensor to reach the vacuum environment, the degassing tank is located in the vacuum chamber and is connected to the vacuum chamber, so the inside of the degassing tank is also a vacuum. The main control unit controls the electric telescopic rod to extend and retract to drive the airtight plate to seal the degassing tank, that is, to seal the sample filament in the vacuum environment. The filament support can be taken out from the inside of the vacuum chamber. After the filament support is placed inside the vacuum chamber, the electric telescopic rod is controlled to drive the airtight plate to move the degassing tank.

[0014] Preferably, the sealing end cap has locking grooves at both ends to accommodate locking plates, and a manually operated pull groove in the middle of the sealing end cap.

[0015] Preferably, in any of the above embodiments, the locking plate includes a pneumatic telescopic rod that is signal-connected to the main control unit and a locking plate that fastens the sealing end cover. The pneumatic telescopic rod is fixedly installed inside the vacuum chamber, and a locking plate that is movably connected to the vacuum chamber is fixedly installed at one end of the pneumatic telescopic rod.

[0016] The above technical solution is adopted as follows: When taking out and putting in the filament bracket, the sealing end cover needs to be disassembled and assembled. When disassembling and assembling the sealing end cover, the pneumatic telescopic rod is controlled to extend and retract to drive the clamping plate to move. After the clamping plate is moved out of the sealing end cover, the sealing end cover can be disassembled and assembled through the pull groove. After the clamping plate is inserted into the interior of the sealing end cover, the sealing end cover can be clamped and sealed. A sealing gasket is set at one end of the sealing end cover to facilitate its sealing and fixing of the vacuum chamber.

[0017] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows:

[0018] 1. A detachable filament support is installed inside the vacuum chamber, and sixty degassing slots are opened inside the filament support to accommodate sample filaments. At the same time, a telescopic and adjustable clamping plate and an electric heating element are installed to fix and heat the filament support. The position of the clamping plate can be adjusted as needed to facilitate the disassembly and assembly of the filament support. Sixty sample filaments can be degassed at a time through the degassing slots, which is convenient for degassing large batches of sample filaments, improving work efficiency and facilitating the use of the filament degassing device.

[0019] 2. Set sealing plates at both ends of the filament bracket corresponding to the degassing groove. The sealing plates can seal and protect the degassing groove after degassing, so that the filament can be disassembled and assembled in a vacuum environment after degassing, ensuring the convenience and stability of subsequent filament processing.

[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0022] Figure 1 This is a schematic diagram of the structure according to an embodiment of the present utility model;

[0023] Figure 2 This is an exploded structural diagram according to an embodiment of the present utility model;

[0024] Figure 3 This is a schematic diagram of the filament support structure according to an embodiment of the present utility model;

[0025] Figure 4 This is a cross-sectional structural diagram of the vacuum cavity according to an embodiment of the present invention;

[0026] Among them: 1-vacuum chamber, 2-vacuum pump, 3-clamping plate, 31-drive cylinder, 32-clamping plate, 4-electric heating element, 5-filament bracket, 6-degassing groove, 7-sealing plate, 71-electric telescopic rod, 72-airtight plate, 8-pressure sensor, 9-sealed end cap, 10-clamping plate, 101-pneumatic telescopic rod, 102-clamping plate. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.

[0028] like Figure 1-4 As shown in the figure, an embodiment of the present invention provides a sample filament degassing device suitable for a thermal ionization mass spectrometer, comprising a vacuum chamber 1 for evacuating the filament, a vacuum pump 2 for evacuating the vacuum chamber 1 fixedly installed at the bottom of the vacuum chamber 1, clamping plates 3 for driving fixedly installed at both ends of the vacuum chamber 1, an electric heating element 4 fixedly installed at one end of the clamping plate 3, a detachable filament support 5 sleeved on the surface of the electric heating element 4, sixty degassing grooves 6 for accommodating sample filaments opened inside the filament support 5, sealing plates 7 for sealing the degassing grooves 6 at both ends of the degassing grooves 6, sealing plates 7 for signal connection to a main control unit, a pressure sensor 8 for detecting the internal pressure of the vacuum chamber 1, a sealing end cap 9 for sealing the vacuum chamber 1 in the middle, and locking plates 10 for fastening the sealing end cap 9 on both sides of the sealing end cap 9.

[0029] Preferably, either of the above-mentioned solutions has vertical supports placed on the ground at both ends of the vacuum chamber 1 to support the vacuum chamber 1, the vacuum pump 2 is fixedly installed inside the vertical supports, and the vacuum chamber 1 has a vacuum cavity inside to accommodate the clamping plate 3 and the filament support 5.

[0030] The above technical solution is adopted: the vacuum chamber 1 is supported by a vertical bracket, and the gas inside the vacuum chamber is extracted by the vacuum pump 2 to form a vacuum environment inside the vacuum chamber, so that the sample filament can complete the degassing process inside the vacuum chamber.

[0031] Preferably, in any of the above schemes, the clamping plate 3 includes a drive cylinder 31 driven by a pneumatic system and connected to the main control unit via signal, and a clamping plate 32 that moves inside the vacuum chamber. The drive cylinder 31 is fixedly installed at both ends of the vacuum chamber 1, and the clamping plate 32 is fixedly installed at the output end of the drive cylinder 31. The electric heating element 4 is fixedly installed at one end of the clamping plate 32, and the electric heating element 4 is connected to the main control unit via signal.

[0032] Using the above technical solution: the filament holder 5 filled with sample filaments is placed at the center of the vacuum chamber 1, and the drive cylinder 31 is controlled to extend and retract to move the clamping plate 32 closer to the filament holder 5, so that the clamping plate 32 drives the electric heating element 4 and the filament holder 5 to engage. The clamping plate 32 clamps the filament holder 5 inside the vacuum chamber 1, and the gas inside the filament holder 5 can be extracted during the vacuuming process of the vacuum chamber.

[0033] Preferably, in any of the above embodiments, the filament support 5 has a slot in the middle that engages with the electric heating element 4, the diameter of the filament support 5 is smaller than the diameter of the clamping plate 32, the diameter of the clamping plate 32 is smaller than the diameter of the vacuum chamber, the two ends of the filament support 5 have movable slots for accommodating the sealing plate 7, the pressure sensor 8 is located between the clamping plate 32 and the inner wall of the vacuum chamber, and the pressure sensor 8 is fixedly installed at the end of the vacuum chamber 1 away from the vacuum pump 2.

[0034] Using the above technical solution: the filament support 5 is made of thermally conductive material. After the electric heating element 4 is inserted into the filament support 5, the electric heating element 4 can be controlled to heat and transfer the heat through the filament support 5 to the inside of the degassing tank 6 to heat the sample filament inside the degassing tank 6. At the same time, during the vacuuming process of the vacuum chamber, the pressure sensor 8 detects the pressure inside the vacuum chamber in real time and controls the sealing plate 7 according to the detected pressure value.

[0035] Preferably, in any of the above schemes, the sealing plate 7 includes an electric telescopic rod 71 that is signal-connected to the main control unit and an airtight plate 72 that seals the degassing groove 6. The electric telescopic rod 71 is fixedly installed inside the filament bracket 5, and one end of the electric telescopic rod 71 is fixedly installed with an airtight plate 72 that is movably connected to the filament bracket 5. The area of ​​the airtight plate 72 is larger than the end face area of ​​the degassing groove 6.

[0036] Using the above technical solution: When the air pressure inside the vacuum chamber is detected by the air pressure sensor 8 to reach the vacuum environment, since the degassing tank 6 is located in the vacuum chamber and is connected to the vacuum chamber, the inside of the degassing tank 6 is also a vacuum. The main control unit controls the electric telescopic rod 71 to extend and retract, driving the airtight plate 72 to seal the degassing tank 6, that is, to seal the sample filament in the vacuum environment. The filament support 5 can be taken out from the inside of the vacuum chamber. After the filament support 5 is placed inside the vacuum chamber, the electric telescopic rod 71 is controlled to drive the airtight plate 72 to move the degassing tank 6.

[0037] Preferably, the sealing end cap 9 has locking grooves at both ends to accommodate the locking plate 10, and a manually operated pull groove in the middle of the sealing end cap 9.

[0038] Preferably, in any of the above schemes, the locking plate 10 includes a pneumatic telescopic rod 101 that is signal-connected to the main control unit and a locking plate 102 that fastens the sealing end cover 9. The pneumatic telescopic rod 101 is fixedly installed inside the vacuum chamber 1, and a locking plate 102 that is movably connected to the vacuum chamber 1 is fixedly installed at one end of the pneumatic telescopic rod 101.

[0039] Using the above technical solution: When taking out or putting in the filament bracket 5, the sealing end cover 9 needs to be disassembled and assembled. When disassembling and assembling the sealing end cover 9, the pneumatic telescopic rod 101 is controlled to extend and retract to drive the clamping plate 102 to move. After the clamping plate 102 is moved out of the sealing end cover 9, the sealing end cover 9 can be disassembled and assembled through the pull groove. After the clamping plate 102 is inserted into the interior of the sealing end cover 9, the sealing end cover 9 can be clamped and sealed. A sealing gasket is set at one end of the sealing end cover 9 to facilitate its sealing and fixing of the vacuum chamber.

[0040] This invention relates to a sample filament degassing device for thermal ionization mass spectrometers, the working principle of which is as follows:

[0041] Control the pneumatic telescopic rod 101 to move the clamping plate 102 out of the sealing end cover 9, remove the sealing end cover 9, place the filament bracket 5 into the vacuum chamber 1, control the drive cylinder 31 to drive the clamping plate 32 to clamp the filament bracket 5, after sealing the vacuum chamber 1 with the sealing end cover 9, control the pneumatic telescopic rod 101 to drive the clamping plate 102 into the sealing end cover 9, control the electric telescopic rod 71 to drive the airtight plate 72 to release the seal on the degassing groove 6, and control the vacuum pump 2 and the electric heating element 4 to degas the filament.

[0042] Compared with the prior art, the present invention has the following advantages:

[0043] 1. A detachable filament support 5 is installed inside the vacuum chamber 1, and sixty degassing grooves 6 are opened inside the filament support 5 to accommodate sample filaments. At the same time, a telescopic and adjustable clamping plate 3 and an electric heating element 4 are set to fix and heat the filament support 5. The position of the clamping plate 3 can be adjusted as needed to facilitate the disassembly and assembly of the filament support 5. The degassing grooves 6 can degas sixty sample filaments at a time, which is convenient for degassing a large number of sample filaments, improving work efficiency and facilitating the use of the filament degassing device.

[0044] 2. Sealing plates 7 corresponding to the degassing groove 6 are set at both ends of the filament bracket 5. The sealing plates 7 can seal and protect the degassing groove 6 after degassing, so that the filament can be disassembled and assembled in a vacuum environment after degassing, ensuring the convenience and stability of subsequent filament processing.

Claims

1. A sample filament degassing device suitable for thermal ionization mass spectrometer, comprising a vacuum cavity (1) for vacuum containing the filament, a vacuum pump (2) for vacuumizing the vacuum cavity (1) is fixedly installed at the bottom of the vacuum cavity (1), characterized in that: The both ends of the vacuum cavity (1) are fixedly installed with driving clamping plates (3), one end of the clamping plate (3) is fixedly installed with an electric heating body (4), the surface of the electric heating body (4) is sleeved with a detachable filament support (5), the inside of the filament support (5) is provided with sixty gas removal grooves (6) for containing sample filaments, the both ends of the gas removal groove (6) are provided with sealing plates (7) for closing the gas removal groove (6), the sealing plate (7) is signal connected with a main control unit, the main control unit is signal connected with a gas pressure sensor (8) for detecting the internal gas pressure of the vacuum cavity (1), the middle of the vacuum cavity (1) is provided with a sealing end cover (9) for closing the vacuum cavity (1), the both sides of the sealing end cover (9) are provided with clamping plates (10) for fastening the sealing end cover (9).

2. A device for outgassing a sample filament for use in a thermal ionization mass spectrometer as defined in claim 1, characterized in that: The both ends of the vacuum cavity (1) are provided with vertical supports placed on the ground for supporting the vacuum cavity (1), the vacuum pump (2) is fixedly installed in the inside of the vertical support, the inside of the vacuum cavity (1) is provided with a vacuum cavity for containing the clamping plate (3) and the filament support (5).

3. A device for outgassing a sample filament for use in a thermal ionization mass spectrometer as defined in claim 2, wherein: The clamping plate (3) includes a driving cylinder (31) driven by a pneumatic system and signal connected with the main control unit, and a clamping plate (32) moving in the vacuum cavity, the driving cylinder (31) is fixedly installed at the both ends of the vacuum cavity (1), the output end of the driving cylinder (31) is fixedly installed with the clamping plate (32), the electric heating body (4) is fixedly installed at one end of the clamping plate (32), and the electric heating body (4) is signal connected with the main control unit.

4. A device for outgassing a sample filament for use in a thermal ionization mass spectrometer as defined in claim 3, wherein: The middle of the filament support (5) is provided with a notch engaged with the electric heating body (4), the diameter of the filament support (5) is smaller than the diameter of the clamping plate (32), the diameter of the clamping plate (32) is smaller than the diameter of the vacuum cavity, the both ends of the filament support (5) are provided with movable grooves containing the sealing plates (7), the gas pressure sensor (8) is located between the clamping plate (32) and the inner wall of the vacuum cavity, and the gas pressure sensor (8) is fixedly installed at one end of the vacuum cavity (1) away from the vacuum pump (2).

5. A device for outgassing a sample filament for use in a thermal ionization mass spectrometer as defined in claim 4, wherein: The sealing plate (7) includes an electric telescopic rod (71) signal connected with the main control unit and an airtight plate (72) sealing the gas removal groove (6), the electric telescopic rod (71) is fixedly installed in the inside of the filament support (5), one end of the electric telescopic rod (71) is fixedly installed with the airtight plate (72) movably connected with the filament support (5), and the area of the airtight plate (72) is larger than the end surface area of the gas removal groove (6).

6. A device for outgassing a sample filament for use in a thermal ionization mass spectrometer as defined in claim 5, wherein: The both ends of the sealing end cover (9) are provided with clamping grooves containing the clamping plates (10), and the middle of the sealing end cover (9) is provided with a manually operated pull groove.

7. A device for outgassing a sample filament for use in a thermal ionization mass spectrometer as defined in claim 6, wherein: The clamping plate (10) comprises a pneumatic telescopic rod (101) in signal connection with a master unit and a clamping plate (102) for fastening the sealing end cover (9), the pneumatic telescopic rod (101) is fixedly installed in the interior of the vacuum cavity (1), and one end of the pneumatic telescopic rod (101) is fixedly installed with the clamping plate (102) in movable connection with the vacuum cavity (1).

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