A vaporization device applied to an aerosol mass spectrometer

Abstract

This invention provides a vaporization device for use in an aerosol mass spectrometer. It includes a platform with a support mounted on it. A mounting slot A is located above the support, and a mounting block A is inserted into the slot A. A thermocouple is installed in the mounting block A. A limiting plate is rotatably mounted above the support. In this invention, instantaneous vaporization of the sample is achieved through heating with a tungsten heating wire without decomposition. The device includes core components such as a heater support, thermocouple, tungsten heating wire, semiconductor cooler, and adjustable power supply, and is positioned after the sample system of the aerosol mass spectrometer. During operation, the device rapidly vaporizes the liquid in the sample, and the vaporized gas directly enters the ionization chamber for subsequent analysis. It not only possesses high-efficiency vaporization capabilities but also features economic practicality, precise temperature control, and a high degree of automation, stably meeting the sample pretreatment requirements of aerosol mass spectrometers.

Description

Technical Field

[0001] This utility model relates to an aerosol vaporization device, and more particularly to a vaporization device used in an aerosol mass spectrometer, belonging to the field of mass spectrometry technology. Background Technology

[0002] In the workflow of an aerosol mass spectrometer, the first step after the sample enters the instrument is vaporization. This step is crucial to the accuracy of subsequent analyses, system stability, and equipment lifespan. Incomplete vaporization can lead to biased analytical results, contamination of the analytical system, and even shorten the lifespan of core components such as the molecular pump.

[0003] Currently, the mainstream gasification devices on the market use nickel-chromium alloy wire as the core heating element, but this type of device has obvious drawbacks:

[0004] Firstly, the material costs are relatively high, which will increase the overall investment in equipment;

[0005] Secondly, nickel-chromium alloy wire has a short service life at high temperatures and needs to be replaced frequently, which reduces the operating efficiency of the equipment.

[0006] Third, nickel-chromium alloy wire is prone to oxidation, which affects the stability of heating performance and further leads to fluctuations in vaporization effect, thus affecting the reliability of mass spectrometry analysis.

[0007] Therefore, a vaporization device is needed to solve the problems of short lifespan, easy oxidation, and high cost mentioned above, so as to meet the requirements of aerosol mass spectrometry for efficient, stable, and economical sample vaporization processing.

[0008] Therefore, a vaporization device for use in aerosol mass spectrometry is proposed. Utility Model Content

[0009] In view of this, the present invention provides a vaporization device for use in aerosol mass spectrometers to solve or alleviate the technical problems existing in the prior art, and at least provides a beneficial alternative.

[0010] The technical solution of this utility model is implemented as follows: A vaporization device applied to an aerosol mass spectrometer includes a platform, a bracket mounted on the platform, a mounting slot A above the bracket, a mounting block A inserted into the mounting slot A, a thermocouple installed in the mounting block A, a limiting plate rotatably mounted above the bracket, a mounting slot B inside the bracket, a mounting block B inserted into the mounting slot B, a heating groove cylinder on the mounting block B, a tungsten heating wire inside the heating groove cylinder, a threaded seat mounted on the heating groove cylinder, a fixing bolt threadedly connected to the threaded seat, a pressure block installed below the fixing bolt, a mounting slot C on the bracket, a semiconductor cooler inserted into the mounting slot C, an adjustable power supply mounted on the platform, a control board also mounted on the platform, and a feed pipe connected to the bracket.

[0011] More preferably, the mounting slot A has vertical slots on both sides, and the mounting block A has protrusion structures that are adapted to the slots on both sides, with the protrusion structures inserted into the slots.

[0012] More preferably, the thermocouple is located between the support and the tungsten heating wire.

[0013] More preferably, the material of the pressing block is ceramic.

[0014] More preferably, the heating tank is provided with a slot for inserting a tungsten heating wire.

[0015] More preferably, an ionization chamber is installed on the platform, and the ionization chamber is connected to the support via a pipe.

[0016] The present invention has the following advantages due to the adoption of the above technical solution:

[0017] This invention utilizes tungsten heating wire as the core heating component. Its high melting point, high temperature resistance, and strong oxidation resistance effectively solve the problems of easy oxidation and short lifespan of existing nickel-chromium alloy wires at high temperatures. It can achieve 1,000 hours of trouble-free operation, significantly reducing replacement frequency and maintenance costs. Combined with real-time thermocouple temperature measurement and precise temperature control via an adjustable power supply, the heating process is ensured to be stable and controllable, avoiding incomplete vaporization caused by fluctuations in heating performance. This reduces subsequent analytical bias, system contamination, and the impact on the molecular pump's lifespan. Furthermore, tungsten heating wire is less expensive than nickel-chromium alloy wire, and the bracket allows for quick and easy installation and removal of different tungsten wire specifications without requiring a complete device replacement, solving the problems of high price and inconvenient maintenance in existing devices. The addition of a semiconductor cooler enables rapid cooling, making it suitable for samples requiring low-temperature evaporation and broadening its applicability. The intelligent control system enables automatic temperature adjustment, improving operational convenience and overcoming the shortcomings of existing devices in terms of limited functionality and low automation.

[0018] In summary, this device has significant advantages in terms of extending lifespan, improving stability, enhancing economy, and increasing adaptability, and can better meet the needs of aerosol mass spectrometers for sample vaporization processing.

[0019] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is an exploded structural diagram of the mounting block A of this utility model;

[0023] Figure 3 This is a diagram of the internal structure of the bracket in this utility model;

[0024] Figure 4 This is an exploded view of the mounting block B in this utility model;

[0025] Figure 5 In this utility model Figure 4 Partial structural diagram;

[0026] Figure 6 This is an exploded view of the semiconductor cooler in this utility model.

[0027] Reference numerals: 1. Platform; 2. Bracket; 3. Mounting slot A; 4. Mounting block A; 5. Thermocouple; 6. Limiting plate; 7. Mounting slot B; 8. Mounting block B; 9. Heating tank cylinder; 10. Tungsten heating wire; 11. Threaded seat; 12. Top bolt; 13. Pressure block; 14. Mounting slot C; 15. Semiconductor cooler; 16. Adjustable power supply; 17. Control board; 18. Feeding tube. Detailed Implementation

[0028] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0029] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0030] like Figure 1-5 As shown, this utility model embodiment provides a vaporization device applied to an aerosol mass spectrometer, including a platform 1, a bracket 2 mounted on the platform 1, a mounting slot A3 above the bracket 2, a mounting block A4 inserted into the mounting slot A3, a thermocouple 5 installed in the mounting block A4, a limiting piece 6 rotatably mounted above the bracket 2, a mounting slot B7 inside the bracket 2, a mounting block B8 inserted into the mounting slot B7, a heating tube 9 mounted on the mounting block B8, a tungsten heating wire 10 inside the heating tube 9, a threaded seat 11 mounted on the heating tube 9, a fixing bolt 12 threadedly connected to the threaded seat 11, a pressure block 13 installed below the fixing bolt 12, a mounting slot C14 on the bracket 2, a semiconductor cooler 15 inserted into the mounting slot C14, an adjustable power supply 16 mounted on the platform 1, a control board 17 also mounted on the platform 1, and a feed pipe 18 connected to the bracket 2. Thermocouple 5 monitors the temperature of the heating area in real time and continuously transmits the temperature signal to control board 17. Control board 17 analyzes the received temperature data to determine whether the current temperature is within the preset target range (100-800℃). When control board 17 detects that the temperature is lower than the target value, it sends a command to adjustable power supply 16 to increase its output power, thereby increasing the heat generation of tungsten heating wire 10 and rapidly raising the temperature of the heating area. If the temperature is higher than the target value, control board 17 controls adjustable power supply 16 to reduce the output power, thereby reducing the heat generation of tungsten heating wire 10 and ensuring that temperature fluctuations are controlled within 5%, thus preventing the sample from decomposing due to overheating or incomplete vaporization due to underheating.

[0031] In one embodiment, vertical slots are provided on both sides of the mounting slot A3, and protrusion structures adapted to the slots are installed on both sides of the mounting block A4. The protrusion structures are inserted into the slots. The thermocouple 5 is fixed by the mounting block A4, and the protrusions on both sides are inserted into the slots for positioning. The limiting piece 6 is rotated to limit the position.

[0032] In one embodiment, thermocouple 5 is located between bracket 2 and tungsten heating wire 10. Thermocouple 5 monitors the temperature of the heating area in real time and transmits the data to control board 17, which adjusts the output power of adjustable power supply 16 according to a preset program.

[0033] In one embodiment, the pressure block 13 is made of ceramic. Ceramic is not only resistant to high temperatures, but also has a long service life and is hard, ensuring that the tungsten heating wire 10 maintains stable performance during long-term high-temperature operation.

[0034] In one embodiment, a slot is provided inside the heating tank 9 for inserting a tungsten heating wire 10. A new tungsten heating wire 10 is placed into the slot of the heating tank 9, and the top bolt 12 is tightened in the reverse direction. The tungsten heating wire 10 is then re-tightened by the pressure block 13.

[0035] In one embodiment, an ionization chamber is installed on the platform 1, and the ionization chamber is connected to the support 2 via a pipe. The vaporized gas is transported to the ionization chamber through the pipe connecting the support 2 and the ionization chamber for subsequent analysis.

[0036] In operation: After the device is started, the aerosol sample is transported to the heating area inside the support 2 through the feeding pipe 18. At this time, the adjustable power supply 16 supplies power to the tungsten heating wire 10 in the heating tank 9. The tungsten heating wire 10 heats up rapidly under the action of current. At the same time, the thermocouple 5 installed above the support 2 monitors the temperature of the heating area in real time and transmits the data to the control board 17. The control board 17 adjusts the output power of the adjustable power supply 16 according to the preset program to stabilize the temperature of the tungsten heating wire 10 at 100-800℃ with fluctuations controlled within 5%, ensuring that the aerosol sample vaporizes instantly without decomposing when it comes into contact with the high-temperature tungsten wire, avoiding the problem of incomplete vaporization caused by temperature instability.

[0037] During sample vaporization, the semiconductor cooler 15 is ready to operate according to the instructions of the control board 17. When samples requiring low-temperature evaporation need to be processed, the semiconductor cooler 15 rapidly reduces the temperature of the heating zone, and, in conjunction with the precise temperature control of the tungsten heating wire 10, achieves diverse vaporization needs. During the interval between two uses, its rapid cooling can shorten the standby time of the device and improve continuous working efficiency. The vaporized gas is transported to the ionization chamber through the pipe connected to the support 2 and the ionization chamber for subsequent analysis. Throughout the process, thermocouple 5 is fixed by mounting block A4, and the protrusions on both sides are inserted into the slots for positioning. Limiting plate 6 rotates to limit the movement. Semiconductor cooler 15 is fixed to bracket 2 by mounting slot C14 and bolts. Tungsten heating wire 10 is fixed to ceramic pressure block 13 by top fixing bolt 12 on heating tank 9 to ensure that tungsten heating wire 10 maintains stable performance during long-term high-temperature operation. When replacing, first loosen the top fixing bolt 12 in threaded seat 11 to release the pressure block 13 from squeezing tungsten heating wire 10 and release the fixation. Then, take out the old tungsten heating wire 10 from the slot in heating tank 9. Next, put the new tungsten heating wire 10 into the slot in heating tank 9, adjust it to the appropriate position, and then tighten the top fixing bolt 12 in the opposite direction. The pressure block 13 then re-presses the tungsten heating wire 10 to ensure that it is stable and does not loosen during heating.

[0038] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A vaporization device for use in an aerosol mass spectrometer, characterized in that: The system includes a platform (1), on which a bracket (2) is mounted. A mounting slot A (3) is located above the bracket (2). A mounting block A (4) is inserted into the mounting slot A (3), and a thermocouple (5) is installed in the mounting block A (4). A limiting piece (6) is rotatably mounted above the bracket (2). A mounting slot B (7) is located inside the bracket (2), and a mounting block B (8) is inserted into the mounting slot B (7). A heating groove (9) is mounted on the mounting block B (8). The heating tank (9) is equipped with a tungsten heating wire (10), a threaded seat (11) is installed on the heating tank (9), a top bolt (12) is threadedly connected to the threaded seat (11), a pressure block (13) is installed below the top bolt (12), a mounting slot C (14) is provided on the bracket (2), a semiconductor cooler (15) is inserted in the mounting slot C (14), an adjustable power supply (16) is installed on the platform (1), a control board (17) is also installed on the platform (1), and a feeding pipe (18) is connected to the bracket (2).

2. The vaporization device for use in an aerosol mass spectrometer according to claim 1, characterized in that: The mounting slot A (3) has vertical slots on both sides, and the mounting block A (4) has protrusion structures that are compatible with the slots on both sides, and the protrusion structures are inserted into the slots.

3. The vaporization device for use in an aerosol mass spectrometer according to claim 1, characterized in that: The thermocouple (5) is located between the support (2) and the tungsten heating wire (10).

4. The vaporization device for use in an aerosol mass spectrometer according to claim 1, characterized in that: The material of the pressing block (13) is ceramic.

5. The vaporization device for use in an aerosol mass spectrometer according to claim 1, characterized in that: The heating tank (9) is provided with a slot for inserting a tungsten heating wire (10).

6. The vaporization device for use in an aerosol mass spectrometer according to claim 1, characterized in that: An ionization cavity is installed on the platform (1), and the ionization cavity is connected to the support (2) through a pipe.

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