A detector with a built-in heating module

Abstract

This invention provides a detector with a built-in heating module, which reliably increases the temperature of the detector mounting cavity area, thereby maintaining the sample in a vaporized state as much as possible, reducing sample deposition, and thus extending the detector's lifespan. It includes: a mounting housing with a top cover; a multiplier mounting component with an upper connector and a lower mounting bracket; a multiplier; and a heating module; the top connecting block of the upper connector is fixed to the top cover, and the bottom of the upper connector is fixed to the heating module. The heating module is externally connected to the mounting housing via a wire and is an electric heating module. The lower mounting bracket extends downward and is fixed to the multiplier.

Description

Technical Field

[0001] This utility model relates to the technical field of heater structures, specifically a detector with a built-in heating module. Background Technology

[0002] Mass spectrometry is a detection tool that uses electric and / or magnetic fields to measure the mass of ions. From ionization to passing through an ion optical system and then a mass analyzer, where ions are separated according to their mass-to-charge ratio, the number of ions reaching the detector is very limited. The detector amplifies the generated primary electrical signal; the amplification factor depends on the ion optical system at the detector's front end, the electrode voltage, and the voltage applied to the detector; it is also affected by the cleanliness of the surface of the materials used in the detector.

[0003] Detectors (multipliers) have a limited lifespan, which depends on the operating environment, the properties of the sample being analyzed, and the frequency of use. In practice, it has been found that when using mass spectrometry and gas chromatography (GC) to analyze less volatile samples, especially at high detection frequencies, the multiplier's lifespan can be halved compared to conventional detection frequencies. The main reason is that less volatile samples are vaporized at high temperatures in the GC section before entering the mass spectrometer. Since the temperature in the mass spectrometer is lower than that of the GC, and especially since the detector is furthest from the GC, the sample easily deposits on the detector surface. This deposition reduces sensitivity, necessitating an increase in detector voltage. This cycle accelerates detector aging and ultimately leads to failure. Furthermore, uneven sample deposition on the detector surface causes fluctuations in amplification, resulting in inconsistent signal strength and casting doubt on the reliability of the detection results.

[0004] Therefore, there is an urgent need to develop a corresponding structure for heating the detector. Utility Model Content

[0005] To address the aforementioned issues, this invention provides a detector with a built-in heating module, which reliably increases the temperature of the detector mounting cavity area, thereby maintaining the sample in a vaporized state as much as possible, preventing sample deposition, and thus extending the detector's service life.

[0006] A detector with a built-in heating module, characterized in that it comprises:

[0007] Mounting housing, which includes a top cover;

[0008] Multiplier mounting components, including an upper connector and a lower mounting bracket;

[0009] Multiplier;

[0010] And heating module;

[0011] The top connecting block of the upper connector is fixed to the upper cover, and the bottom of the upper connector is fixed to the heating module. The heating module is externally connected to the outside of the mounting housing via a wire. The heating module is an electric heating module. The lower mounting bracket extends downward and is fixed to the multiplier.

[0012] Its further features are:

[0013] The mounting housing also includes four surrounding plates and a base plate. The multiplier is disposed at one end of the mounting housing along its length. A vacuum gauge is connected to the lower part of the base plate corresponding to the multiplier. A molecular pump is also connected to the end of the base plate away from the multiplier.

[0014] The mounting housing is also provided with an ion emission lens. The vertical plate of the mounting housing away from the multiplier is provided with an ion source transition hole. The ion emission lens is located at intervals on the side of the multiplier near the ion source transition hole.

[0015] The upper connector includes a top connecting block, a transition plate, and a lower connecting block. The top connecting block is fixed to the lower connecting block through the transition plate. The top connecting block is arranged parallel to the lower connecting block. The top connecting block has first positioning holes on both sides in the thickness direction. First fasteners pass through the first positioning holes and are fixed to the corresponding positions of the upper cover. The lower connecting block is fixed to the heating module through second fasteners arranged on both sides. The heating module is located directly below the lower connecting block.

[0016] The top connecting block is fixed to the corresponding top positions of the lower mounting bracket by a third fastener on both sides of one long side facade. The lower mounting bracket is used to fix the multiplier.

[0017] The lower mounting bracket is also fixedly fitted with a multiplier baffle on the end face facing the ion emission lens;

[0018] The heating module is powered by a feeder. The top cover has several feeder mounting positions. The feeder powers the multiplier, and the spare connectors of the feeder are used to power the heating module. Since the wiring requirements of the heating module are not demanding, a standard power supply such as 12V or 24V can be selected. The heating module is also equipped with temperature feedback monitoring to apply appropriate temperatures to samples of different properties.

[0019] This invention adds a heating module to the vicinity of the multiplier. The heating module is reliably installed through the multiplier mounting bracket. When the heating module is powered on, it reliably increases the temperature of the detector mounting cavity area, thereby keeping the sample in a vaporized state as much as possible, making it less likely for the sample to deposit, and thus improving the service life of the detector. Attached Figure Description

[0020] Figure 1 This is a three-dimensional sectional view of the present invention;

[0021] Figure 2 This is a perspective view of the present invention with the top cover removed;

[0022] Figure 3 This utility model provides a three-dimensional assembly of the multiplier mounting component, the multiplier, and the heating module. Figure 1 ;

[0023] Figure 4 This utility model provides a three-dimensional assembly of the multiplier mounting component, the multiplier, and the heating module. Figure 2 The names corresponding to the serial numbers in the diagram are as follows:

[0024] First fastener 1, second fastener 2, third fastener 3;

[0025] Mounting housing 10, top cover 11, four surrounding plates 12, ion source transition hole 121, base plate 13, multiplier mounting component 20, multiplier 30, heating module 40, upper connector 50, top connecting block 51, transition plate 52, lower connecting block 53, lower mounting bracket 60, multiplier baffle 61, vacuum gauge 70, molecular pump 80, ion emission lens 90, four-core connector 100. Detailed Implementation

[0026] A detector with a built-in heating module, see Figures 1-4 It includes a mounting housing 10, a multiplier mounting component 20, a multiplier 30, and a heating module 40;

[0027] The mounting housing 10 includes a top cover 11, four surrounding composite plates 12, and a bottom plate 13.

[0028] The multiplier mounting component 20 includes an upper connector 50 and a lower mounting bracket 60. The upper connector 50 includes a top connecting block 51, a transition plate 52, and a lower connecting block 53.

[0029] The top connecting block 51 is fixed to the top cover 11, and the lower connecting block 53 is fixed to the heating module 40. The heating module 40 is connected to the outside of the mounting housing 10 via wires. The heating module 40 is an electric heating module. The lower mounting bracket 60 extends downward and is fixed to the multiplier 30.

[0030] In a specific implementation, the multiplier 30 is located at one end of the mounting housing 10 along its length, and the bottom plate 13 is connected to the lower part of the multiplier 30 via a vacuum gauge 70. The end of the bottom plate 13 away from the multiplier 30 is also connected to a molecular pump 80.

[0031] An ion emission lens 90 is also provided inside the mounting housing 10. An ion source transition hole 121 is provided on the vertical plate of the mounting housing 10 away from the multiplier 30. The ion emission lens 90 is located at intervals on the surface region side of the multiplier 30 near the ion source transition hole 121.

[0032] The top connecting block 51 is fixed to the lower connecting block 53 through the transition plate 52. The top connecting block 51 is arranged parallel to the lower connecting block 53. The top connecting block 51 has first positioning holes on both sides in the thickness direction. The first fastener 1 passes through the first positioning hole and is fixed to the corresponding position of the upper cover 11. The lower connecting block 53 is fixed to the heating module 40 through the second fasteners 2 arranged on both sides. The heating module 40 is arranged directly below the lower connecting block 53.

[0033] The top connecting block 51 is fixed to the corresponding positions on the top of the lower mounting bracket 60 by the third fastener 3 on both sides of one long side facade. The lower mounting bracket 60 is used to fix the multiplier 30.

[0034] A multiplier baffle 61 is also fixedly mounted on the end face of the lower mounting bracket 60 facing the ion emission lens 90;

[0035] The heating module 40 is powered through a feeder. The upper cover 11 has multiple feeder mounting positions, mainly for powering the multiplier 30. The feeder has spare connectors to power the heating module 40. Since the wiring requirements of the heating module 40 are not demanding, a standard power supply such as 12V or 24V can be selected. The heating module 40 is also equipped with temperature feedback monitoring to apply appropriate temperatures to samples of different properties. In specific implementation, two sets of four-pin connectors 100 are inserted into the upper cover 11 at the position corresponding to the multiplier 30. The lower core of the four-pin connector 100 is used to connect to the multiplier 30, providing signal and high voltage to the multiplier 30. The spare connectors of the four-pin connector 100 are used to provide power connection to the heating module 40.

[0036] In practice, a heating module is installed inside the detector chamber, with the temperature controlled within the range of 100-400 degrees Celsius. The specific temperature can be set according to the sample. For example, when analyzing polybrominated biphenyls (PBBs), because these compounds have high boiling points, gas chromatography conditions are generally no lower than 280 degrees Celsius. To reduce the deposition of PBBs on the detector, the detector chamber can be maintained at 300 degrees Celsius. In this way, the sample entering the detector remains in the same vaporization state as in gas chromatography.

[0037] A heating module is added in the vicinity of the multiplier. The heating module is reliably installed through the multiplier mounting bracket. When the heating module is powered on, it reliably increases the temperature of the detector mounting cavity area, thereby keeping the sample in a vaporized state as much as possible, making it less likely for the sample to deposit, and thus improving the lifespan of the detector.

[0038] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0039] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A detector with a built-in heating module, characterized in that, It includes: Mounting housing, which includes a top cover; Multiplier mounting components, including an upper connector and a lower mounting bracket; Multiplier; And heating module; The top connecting block of the upper connector is fixed to the upper cover, and the bottom of the upper connector is fixed to the heating module. The heating module is externally connected to the outside of the mounting housing via a wire. The heating module is an electric heating module. The lower mounting bracket extends downward and is fixed to the multiplier.

2. The detector with a built-in heating module according to claim 1, characterized in that: The mounting housing also includes four surrounding plates and a base plate. The multiplier is located at one end of the mounting housing along its length. A vacuum gauge is connected to the lower part of the base plate corresponding to the multiplier. A molecular pump is also connected to the end of the base plate away from the multiplier.

3. The detector with a built-in heating module according to claim 2, characterized in that: The mounting housing is also provided with an ion emission lens. The vertical plate of the mounting housing away from the multiplier is provided with an ion source transition hole. The ion emission lens is located at intervals on the side of the multiplier near the ion source transition hole.

4. The detector with a built-in heating module according to claim 3, characterized in that: The upper connector includes a top connecting block, a transition plate, and a lower connecting block. The top connecting block is fixed to the lower connecting block via the transition plate. The top connecting block is arranged parallel to the lower connecting block. The top connecting block has first positioning holes on both sides in the thickness direction. First fasteners pass through the first positioning holes and are fixed to the corresponding positions of the upper cover. The lower connecting block is fixed to the heating module via second fasteners arranged on both sides. The heating module is located directly below the lower connecting block.

5. A detector with a built-in heating module according to claim 4, characterized in that: The top connecting block is fixed to the corresponding top positions of the lower mounting bracket by a third fastener on both sides of one long side facade. The lower mounting bracket is used to fix the multiplier.

6. A detector with a built-in heating module according to claim 5, characterized in that: The lower mounting bracket is also fixedly fitted with a multiplier baffle on the end face facing the ion emission lens.

7. A detector with a built-in heating module according to claim 1, characterized in that: The heating module is powered by a feeder. The top cover has several feeder mounting positions. The feeder powers the multiplier, and the spare connectors of the feeder are used to power the heating module.

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