An atomizing mechanism for a plasma mass spectrometer

Abstract

The application discloses an atomizing mechanism for a plasma mass spectrometer, and relates to the technical field of atomizers.The atomizing mechanism comprises an atomizing cup, an atomizing head and a sample feeding hopper which are arranged at two openings of the atomizing cup respectively, a transmission mechanism arranged in the atomizing cup, and an atomizing nozzle which is in communication with the inside of the atomizing cup, the sample feeding hopper is rotationally connected with the inner wall of the atomizing cup, and the transmission mechanism is in transmission connection with the sample feeding hopper; the liquid to be atomized flows into the sample feeding hopper through the atomizing head; the atomizing gas flows into the atomizing cup through the sample feeding hopper and can blow the liquid in the sample feeding hopper; the transmission mechanism can drive the sample feeding hopper to rotate under the action of the atomizing gas; and the liquid is discharged through the atomizing nozzle after being atomized in the atomizing cup. In the atomizing process, the transmission mechanism can drive the sample feeding hopper to rotate under the action of the atomizing gas, the rotation of the sample feeding hopper can well decompose the powder and particles in the liquid raw material, the stability of the liquid concentration sent to the plasma light source is ensured, and meanwhile, the atomizer can be prevented from being blocked.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of atomizer, in particular to an atomizing mechanism for plasma mass spectrometer. BACKGROUND

[0002] The inductively coupled plasma mass spectrometer mainly consists of a plasma generator, an atomizer, a torch pipe, a quadrupole mass spectrometer and an ion detector (or collector, such as a fast channel electron multiplier), in addition to a data processing system, a vacuum system and a power supply control system. The atomizer plays an important role in the inductively coupled plasma mass spectrometer.

[0003] During atomization, the atomizing gas flow and the liquid to be atomized are injected into the atomizer for atomization. After the liquid to be atomized is atomized in the atomizing cup, it immediately flows to the built-in plasma light source in the mass spectrometer body for decomposition. The atomized liquid flowing to the plasma light source vaporizes at high temperature and dissociates into ionized gas. These ions are collected by a copper or nickel sampling cone, then form a molecular beam in a low vacuum environment, and then enter the quadrupole mass analyzer through the intercepting plate. The mass analyzer separates according to the mass-to-charge ratio of the ions, and finally reaches the ion detector. According to the proportional relationship between the count and the concentration of the detector, the content or isotope ratio of the element can be measured.

[0004] However, some existing atomizers used in inductively coupled plasma mass spectrometers have the following shortcomings: when the liquid raw material is atomized after dilution, the powder and particles in the liquid raw material are easy to block the atomizer, affecting the atomization effect, and thus affecting the test effect of the inductively coupled plasma mass spectrometer. SUMMARY

[0005] The present application aims to overcome the shortcomings of the prior art and provide an atomizing mechanism for a plasma mass spectrometer.

[0006] The present application aims to overcome the shortcomings of the prior art and provide an atomizing mechanism for a plasma mass spectrometer.

[0007] The present application aims to overcome the shortcomings of the prior art and provide an atomizing mechanism for a plasma mass spectrometer.

[0008] Further, in the present application, the atomizing cup is a column structure; the sample feeding cup comprises a sample feeding cup body with an isosceles trapezoidal longitudinal section, an air inlet pipe and a first conical pipe which are in communication with each other and are both arranged on the sample feeding cup body, the sample feeding cup body is rotationally connected with the inner wall of the atomizing cup; the central axis of the air inlet pipe, the central axis of the first conical pipe and the central axis of the sample feeding cup body are all collinear with the central axis of the atomizing cup; the end of the first conical pipe away from the air inlet pipe extends into the atomizing head.

[0009] Further, in the present application, the atomizing head comprises a liquid inlet pipe which is rotationally connected with the atomizing cup, a baffle and a second conical pipe which are both arranged at one end of the liquid inlet pipe, and the baffle is located between the liquid inlet pipe and the second conical pipe; the central axis of the liquid inlet pipe and the central axis of the second conical pipe are both collinear with the central axis of the atomizing cup; the end of the first conical pipe away from the air inlet pipe extends into the second conical pipe.

[0010] Further, in the present application, the atomizing cup is internally fixedly provided with a bearing with a central axis collinear with the central axis of the atomizing cup, the outer ring of the bearing is fixedly connected with the atomizing cup; the sample feeding cup body is fixedly connected with the inner ring of the bearing.

[0011] Further, in the present application, the transmission mechanism comprises a driving shaft and a driven shaft which are both rotationally arranged in the atomizing cup, a first impeller arranged at one end of the driving shaft and a gear arranged at one end of the driven shaft, the central axis of the driving shaft is perpendicular to the central axis of the atomizing cup, and the central axis of the driven shaft is parallel to the central axis of the atomizing cup; a bevel gear is arranged on the driving shaft and the driven shaft, and the two bevel gears are in mesh with each other; a gear ring is coaxially arranged on the inner ring of the bearing, and the gear is always in mesh with the gear ring.

[0012] Further, in the present application, the second conical pipe is further provided with a driving mechanism which can be controlled by airflow to drive the self-rotation of the second conical pipe.

[0013] Further, in the present application, the driving mechanism comprises a disc arranged in the second conical pipe, a connecting shaft arranged on the disc and a second impeller arranged on the connecting shaft, the central axis of the disc and the central axis of the connecting shaft are both collinear with the central axis of the second conical pipe; a plurality of through holes are formed in the disc.

[0014] Further, in the present application, an exhaust through hole is formed in the atomizing cup, the exhaust through hole is arranged close to the baffle; the atomizing nozzle is arranged in the exhaust through hole.

[0015] Further, in the present application, the outer wall and the inner wall of the second conical tube are provided with a plurality of mist outlet grooves, and any of the mist outlet grooves extends along the length direction of the second conical tube.

[0016] The present application has the following advantages:

[0017] The present application provides an atomizing mechanism for a plasma mass spectrometer, which comprises an atomizing cup, an atomizing head, a sample inlet and a driving mechanism. The atomizing head is installed in the atomizing cup, and the liquid to be atomized flows into the sample inlet through the atomizing head. Atomizing gas flows into the atomizing cup through the sample inlet and can blow the liquid in the sample inlet to complete the atomizing work. During the atomizing process, the driving mechanism can drive the sample inlet to rotate under the action of the atomizing gas flow. The rotation of the sample inlet can well decompose the powder and particles in the liquid raw material, which not only ensures the stability of the liquid concentration sent to the plasma light source, but also prevents the atomizer from being blocked. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The present application provides an atomizing mechanism for a plasma mass spectrometer, which comprises an atomizing cup, an atomizing head, a sample inlet and a driving mechanism. The atomizing head is installed in the atomizing cup, and the liquid to be atomized flows into the sample inlet through the atomizing head. Atomizing gas flows into the atomizing cup through the sample inlet and can blow the liquid in the sample inlet to complete the atomizing work. During the atomizing process, the driving mechanism can drive the sample inlet to rotate under the action of the atomizing gas flow. The rotation of the sample inlet can well decompose the powder and particles in the liquid raw material, which not only ensures the stability of the liquid concentration sent to the plasma light source, but also prevents the atomizer from being blocked.

[0019] Figure 2 The present application provides an atomizing mechanism for a plasma mass spectrometer, which comprises an atomizing cup, an atomizing head, a sample inlet and a driving mechanism. The atomizing head is installed in the atomizing cup, and the liquid to be atomized flows into the sample inlet through the atomizing head. Atomizing gas flows into the atomizing cup through the sample inlet and can blow the liquid in the sample inlet to complete the atomizing work. During the atomizing process, the driving mechanism can drive the sample inlet to rotate under the action of the atomizing gas flow. The rotation of the sample inlet can well decompose the powder and particles in the liquid raw material, which not only ensures the stability of the liquid concentration sent to the plasma light source, but also prevents the atomizer from being blocked. Figure 1

[0020] Figure 3 The present application provides an atomizing mechanism for a plasma mass spectrometer, which comprises an atomizing cup, an atomizing head, a sample inlet and a driving mechanism. The atomizing head is installed in the atomizing cup, and the liquid to be atomized flows into the sample inlet through the atomizing head. Atomizing gas flows into the atomizing cup through the sample inlet and can blow the liquid in the sample inlet to complete the atomizing work. During the atomizing process, the driving mechanism can drive the sample inlet to rotate under the action of the atomizing gas flow. The rotation of the sample inlet can well decompose the powder and particles in the liquid raw material, which not only ensures the stability of the liquid concentration sent to the plasma light source, but also prevents the atomizer from being blocked.

[0021] Figure 4 The present application provides an atomizing mechanism for a plasma mass spectrometer, which comprises an atomizing cup, an atomizing head, a sample inlet and a driving mechanism. The atomizing head is installed in the atomizing cup, and the liquid to be atomized flows into the sample inlet through the atomizing head. Atomizing gas flows into the atomizing cup through the sample inlet and can blow the liquid in the sample inlet to complete the atomizing work. During the atomizing process, the driving mechanism can drive the sample inlet to rotate under the action of the atomizing gas flow. The rotation of the sample inlet can well decompose the powder and particles in the liquid raw material, which not only ensures the stability of the liquid concentration sent to the plasma light source, but also prevents the atomizer from being blocked. Figure 3

[0022] Figure 5 Figure 3

[0023] Figure 6 Figure 5

[0024] Figure 7 The present application provides an atomizing mechanism for a plasma mass spectrometer, which comprises an atomizing cup, an atomizing head, a sample inlet and a driving mechanism. The atomizing head is installed in the atomizing cup, and the liquid to be atomized flows into the sample inlet through the atomizing head. Atomizing gas flows into the atomizing cup through the sample inlet and can blow the liquid in the sample inlet to complete the atomizing work. During the atomizing process, the driving mechanism can drive the sample inlet to rotate under the action of the atomizing gas flow. The rotation of the sample inlet can well decompose the powder and particles in the liquid raw material, which not only ensures the stability of the liquid concentration sent to the plasma light source, but also prevents the atomizer from being blocked.

[0025] Figure 8 The present application provides an atomizing mechanism for a plasma mass spectrometer, which comprises an atomizing cup, an atomizing head, a sample inlet and a driving mechanism. The atomizing head is installed in the atomizing cup, and the liquid to be atomized flows into the sample inlet through the atomizing head. Atomizing gas flows into the atomizing cup through the sample inlet and can blow the liquid in the sample inlet to complete the atomizing work. During the atomizing process, the driving mechanism can drive the sample inlet to rotate under the action of the atomizing gas flow. The rotation of the sample inlet can well decompose the powder and particles in the liquid raw material, which not only ensures the stability of the liquid concentration sent to the plasma light source, but also prevents the atomizer from being blocked.

[0026] Figure 9 The present application provides an atomizing mechanism for a plasma mass spectrometer, which comprises an atomizing cup, an atomizing head, a sample inlet and a driving mechanism. The atomizing head is installed in the atomizing cup, and the liquid to be atomized flows into the sample inlet through the atomizing head. Atomizing gas flows into the atomizing cup through the sample inlet and can blow the liquid in the sample inlet to complete the atomizing work. During the atomizing process, the driving mechanism can drive the sample inlet to rotate under the action of the atomizing gas flow. The rotation of the sample inlet can well decompose the powder and particles in the liquid raw material, which not only ensures the stability of the liquid concentration sent to the plasma light source, but also prevents the atomizer from being blocked.

[0027] ​​​​​​In the figure: 1 - atomizing cup; 2 - atomizing head; 201 - liquid inlet pipe; 202 - baffle; 203 - second conical pipe; 3 - sample feeding hopper; 301 - sample feeding hopper body; 302 - air inlet pipe; 303 - first conical pipe; 4 - transmission mechanism; 401 - driving shaft; 402 - driven shaft; 403 - first impeller; 404 - gear; 405 - bevel gear; 406 - gear ring; 5 - atomizing nozzle; 6 - bearing; 7 - driving mechanism; 701 - disc; 702 - connecting shaft; 703 - second impeller; 8 - mist outlet channel. DETAILED DESCRIPTION

[0028] The technical solutions of the present application will be described below in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort belong to the scope of protection of the present application.

[0029] Please refer to Figures 1-9 The present application provides a technical solution:

[0030] The atomizing mechanism for the plasma mass spectrometer comprises an atomizing cup 1 in the shape of a straight circular tube, which has a top end and a bottom end arranged oppositely. The atomizing head 2 is installed on the top end of the atomizing cup 1. The sample feeding hopper 3 is rotatably installed on the bottom end of the atomizing cup 1. The transmission mechanism 4 is installed in the atomizing cup 1 and is in transmission connection with the sample feeding hopper 3. The atomizing nozzle 5 is installed on the outer wall of the atomizing cup 1 and is in communication with the inside of the atomizing cup 1. When atomizing, the liquid to be atomized flows into the sample feeding hopper 3 through the atomizing head 2. The atomizing gas flows into the atomizing cup 1 through the sample feeding hopper 3 and can blow to the liquid in the sample feeding hopper 3. The transmission mechanism 4 can drive the sample feeding hopper 3 to rotate under the action of the atomizing gas flow. The rotation of the sample feeding hopper 3 can well decompose the powder and particles in the liquid raw material. After the liquid is atomized in the atomizing cup 1, it is discharged to the built-in plasma light source in the mass spectrometer body through the atomizing nozzle 5 to be decomposed. The sample feeding hopper 3 can rotate during the atomizing process, which not only ensures the stability of the liquid concentration sent to the plasma light source, but also prevents the atomizer from being blocked.

[0031] Specifically, the sample feeding hopper 3 in the embodiment comprises a sample feeding hopper body 301 with a longitudinal section in the shape of an isosceles trapezoid, and a gas inlet pipe 302 and a first tapered pipe 303 which are in communication with each other and are both mounted on the sample feeding hopper body 301, and the sample feeding hopper body 301 is rotationally connected with the inner wall of the atomizing cup 1. In the embodiment, the sample feeding hopper body 301, the gas inlet pipe 302 and the first tapered pipe 303 are integrally formed, and the central axis of the gas inlet pipe 302 and the central axis of the first tapered pipe 303 are both collinear with the central axis of the sample feeding hopper body 301, and after the sample feeding hopper 3 is mounted in the atomizing cup 1, the central axis of the gas inlet pipe 302, the central axis of the first tapered pipe 303 and the central axis of the sample feeding hopper body 301 are all collinear with the central axis of the atomizing cup 1. One end of the first tapered pipe 303 is located in the sample feeding hopper body 301, and the other end of the first tapered pipe 303 extends into the atomizing head 2.

[0032] Specifically, the atomizing head 2 in the embodiment comprises a liquid inlet pipe 201 which is rotationally connected with the atomizing cup 1, a baffle 202 and a second tapered pipe 203 which are both arranged at one end of the liquid inlet pipe 201, and the baffle 202 is located between the liquid inlet pipe 201 and the second tapered pipe 203; the central axis of the liquid inlet pipe 201 and the central axis of the second tapered pipe 203 are both collinear with the central axis of the atomizing cup 1; and the end of the first tapered pipe 303 which is away from the gas inlet pipe 302 extends into the second tapered pipe 203.

[0033] In order to facilitate the rotational connection between the sample feeding hopper body 301 and the inner wall of the atomizing cup 1, a bearing 6 with a central axis collinear with the central axis of the atomizing cup 1 is fixedly mounted in the atomizing cup 1 in the embodiment, the outer ring of the bearing 6 is fixedly connected with the inner wall of the atomizing cup 1, and the sample feeding hopper body 301 is fixedly connected with the inner ring of the bearing 6.

[0034] With reference to Figure 5 and Figure 6 , the transmission mechanism 4 in the embodiment comprises a driving shaft 401 and a driven shaft 402 which are both rotationally mounted in the atomizing cup 1, a first impeller 403 mounted at one end of the driving shaft 401 and a gear 404 mounted at one end of the driven shaft 402, the central axis of the driving shaft 401 is perpendicular to the central axis of the atomizing cup 1, and the central axis of the driven shaft 402 is parallel to the central axis of the atomizing cup 1. A bevel gear 405 is mounted on the driving shaft 401 and the driven shaft 402, and the two bevel gears 405 are always in meshing state. A gear ring 406 is coaxially mounted on the inner ring of the bearing 6, and the gear 404 and the gear ring 406 are always in meshing state.

[0035] During installation, the nebulizer cup 1 is vertically mounted within the plasma mass spectrometer, with the atomizer head 2 positioned at the top of the nebulizer cup 1 and the sample inlet hopper body 301 at the bottom. A nebulizer pump is installed within the plasma mass spectrometer, connected to the air inlet pipe 302 via a pipeline. The atomizer pump generates a pressured atomizing gas flow that flows through the pipeline and air inlet pipe 302, into the first tapered tube 303, and then into the second tapered tube 203. The liquid to be atomized flows through the liquid inlet pipe 201 of the atomizer head 2 into the nebulizer cup 1, ultimately landing in the sample inlet hopper body 301.

[0036] from Figure 4 From the perspective of FIG, during atomization, an atomizing airflow with a certain pressure flows into the second conical tube 203 and is ejected from the top of the second conical tube 203. The ejected atomizing airflow is blocked by the baffle 202 and changes to flow in a horizontal direction. The negative pressure generated by the high-speed atomizing airflow breaks the liquid falling in the atomizing cup 1 into mist, thereby completing the atomization work.

[0037] from Figure 5 or Figure 6 From a 3D perspective, a portion of the horizontally flowing atomizing airflow will be blown toward the first impeller 403, causing it to rotate. The rotation of the first impeller 403 is controlled by the driving shaft 401, two bevel gears 405, the driven shaft 402, and the gear 404, which in turn controls the rotation of the ring gear 406. The rotation of the ring gear 406 in turn drives the inner ring of the bearing 6, which in turn drives the injection funnel body 301. Liquid falling into the atomization cup 1 will partially drip into the injection funnel body 301. During the atomization process, the rotation of the injection funnel body 301 effectively breaks down powder and particles in the liquid feedstock, ensuring a stable concentration of the liquid fed to the plasma light source while preventing clogging of the atomizer.

[0038] The formation of vortices should be avoided during the atomization process of the liquid, because vortices will complicate the droplet movement path, reduce transmission efficiency, increase droplet loss, and may cause memory effects, thereby affecting the accuracy and sensitivity of the analysis results.

[0039] In order to solve the above problem, the second conical tube 203 can be rotated during the atomization process, and its rotation direction is opposite to the rotation flow direction of the atomized particles in the atomization cup 1, thereby further hindering the formation of vortex. Figure 4 、 Figure 5 、 Figure 6 and Figure 9 In this embodiment, a driving mechanism 7 is installed in the second tapered tube 203 and can be controlled by airflow to drive the second tapered tube 203 to rotate.

[0040] Specifically, the driving mechanism 7 in the embodiment includes a disc 701 installed in the second conical tube 203, a connecting shaft 702 installed on the disc 701, and a second impeller 703 installed on the connecting shaft 702. After the disc 701 is installed in the second conical tube 203, the central axis of the disc 701 and the central axis of the connecting shaft 702 are both collinear with the central axis of the second conical tube 203. Meanwhile, a plurality of through holes (not labeled in the figure) are formed in the disc 701 for the atomized gas flow to pass through.

[0041] From the perspective of Figure 4 , in the atomization process, the atomized gas flow with a certain pressure flows upward in the second conical tube 203 and simultaneously impacts the second impeller 703, so that the second impeller 703 rotates. The rotation of the second impeller 703 drives the second conical tube 203 to rotate through the connecting shaft 702 and the disc 701, thereby hindering the formation of the vortex.

[0042] With reference to Figure 4 , in order to facilitate the installation of the atomization nozzle 5, the atomization cup 1 is provided with an exhaust through hole (not labeled in the figure) in the embodiment. The exhaust through hole is arranged close to the baffle 202, and the atomization nozzle 5 is arranged in the exhaust through hole. The atomized gas flow in the atomization cup 1 is discharged through the atomization nozzle 5 and then flows to the plasma light source built in the mass spectrometer body for decomposition.

[0043] Meanwhile, another way can also be used to further avoid the formation of the vortex of the atomized particles in the atomization cup 1, thereby avoiding the retention of the atomized particles: a plurality of mist outlets 8 are formed in the outer wall and the inner wall of the second conical tube 203 in the embodiment. Any mist outlet 8 extends along the length direction of the second conical tube 203.

[0044] Working principle:

[0045] When installed, the atomization cup 1 is vertically installed in the plasma mass spectrometer, and the atomization head 2 is located at the top end of the atomization cup 1, and the sample cup body 301 is located at the bottom end of the atomization cup 1. A mist pump is installed in the plasma mass spectrometer. The mist pump and the gas inlet pipe 302 are connected through a pipeline. The atomized gas flow with a certain pressure generated by the mist pump can enter the first conical tube 303 through the pipeline and the gas inlet pipe 302 in sequence, and then flow into the second conical tube 203. The liquid to be atomized flows into the atomization cup 1 through the liquid inlet pipe 201 of the atomization head 2, and finally falls into the sample cup body 301.

[0046] From the perspective of Figure 4 , in the atomization process, the atomized gas flow with a certain pressure flows into the second conical tube 203 and is sprayed from the top end of the second conical tube 203. Under the blockage of the baffle 202, the sprayed atomized gas flow changes to flow horizontally. The negative pressure generated by the high-speed flowing atomized gas flow breaks the falling liquid in the atomization cup 1 into a mist, thereby completing the atomization work.

[0047] From the perspective of Figure 5 or Figure 6 , a part of the atomized gas flow flowing in the horizontal direction will blow to the first impeller 403, so as to make the first impeller 403 rotate. The rotation of the first impeller 403 controls the rotation of the ring gear 406 through the driving shaft 401, two bevel gears 405, the driven shaft 402 and the gear 404, the rotation of the ring gear 406 in turn drives the inner ring of the bearing 6 to rotate, and the rotation of the inner ring of the bearing 6 drives the sample cup body 301 to rotate. The liquid falling in the atomizing cup 1 will be partially dropped into the sample cup body 301, and the rotation of the sample cup body 301 during the atomization process can well decompose the powder and particles in the liquid raw material, which not only ensures the stability of the liquid concentration sent to the plasma light source, but also prevents the atomizer from being blocked.

[0048] From the perspective of Figure 4 , during the atomization process, the atomized gas flow with a certain pressure will impact the second impeller 703 while flowing upward in the second conical tube 203, and the second impeller 703 will rotate in turn. The rotation of the second impeller 703 drives the second conical tube 203 to rotate through the connecting shaft 702 and the disc 701, so as to hinder the formation of the vortex.

[0049] The above description is only the preferred embodiment of the present application, and it should be understood that the present application is not limited to the form disclosed herein, and should not be considered as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein, by the above-mentioned teaching or related technical or knowledge. The modification and change made by the person skilled in the art without departing from the spirit and scope of the present application shall be within the protection scope of the appended claims of the present application.

Claims

1. An atomization mechanism for a plasma mass spectrometer, characterized by: The application relates to an atomizing cup, which comprises an atomizing cup (1) with two oppositely arranged openings, an atomizing head (2) and a sample feeding cup (3) arranged at the two openings of the atomizing cup (1) respectively, a transmission mechanism (4) arranged in the atomizing cup (1), and an atomizing nozzle (5) in communication with the inside of the atomizing cup (1). The sample feeding cup (3) is rotationally connected with the inner wall of the atomizing cup (1), and the transmission mechanism (4) is transmissionally connected with the sample feeding cup (3). Liquid to be atomized flows into the sample feeding cup (3) through the atomizing head (2). Atomizing gas flows into the atomizing cup (1) through the sample feeding cup (3) and can blow to the liquid in the sample feeding cup (3). The transmission mechanism (4) can drive the sample feeding cup (3) to rotate under the action of the atomizing gas. The atomized liquid is discharged through the atomizing nozzle (5).

2. The atomizing mechanism for a plasma mass spectrometer according to claim 1, characterized in that: The atomizing cup (1) is a cylindrical structure. The sample feeding cup (3) comprises a sample feeding cup body (301) with an isosceles trapezoidal longitudinal section, and a gas inlet pipe (302) and a first conical pipe (303) which are in communication with each other and are arranged on the sample feeding cup body (301). The sample feeding cup body (301) is rotationally connected with the inner wall of the atomizing cup (1). The central axis of the gas inlet pipe (302), the central axis of the first conical pipe (303) and the central axis of the sample feeding cup body (301) are collinear with the central axis of the atomizing cup (1). The end of the first conical pipe (303) away from the gas inlet pipe (302) extends into the atomizing head (2).

3. The atomizing mechanism for a plasma mass spectrometer according to claim 2, wherein: The atomizing head (2) comprises a liquid inlet pipe (201) rotationally connected with the atomizing cup (1), a baffle (202) and a second conical pipe (203) arranged at one end of the liquid inlet pipe (201), and the baffle (202) is located between the liquid inlet pipe (201) and the second conical pipe (203). The central axis of the liquid inlet pipe (201) and the central axis of the second conical pipe (203) are collinear with the central axis of the atomizing cup (1). The end of the first conical pipe (303) away from the gas inlet pipe (302) extends into the second conical pipe (203).

4. The atomizing mechanism for a plasma mass spectrometer according to claim 2, wherein: A bearing (6) with a central axis collinear with the central axis of the atomizing cup (1) is fixedly arranged in the atomizing cup (1). The outer ring of the bearing (6) is fixedly connected with the atomizing cup (1). The sample feeding cup body (301) is fixedly connected with the inner ring of the bearing (6).

5. The atomizing mechanism for a plasma mass spectrometer of claim 4, wherein: The transmission mechanism (4) comprises a driving shaft (401) and a driven shaft (402) which are both rotationally arranged in the atomizing cup (1), a first impeller (403) arranged at one end of the driving shaft (401) and a gear (404) arranged at one end of the driven shaft (402), the central axis of the driving shaft (401) is perpendicular to the central axis of the atomizing cup (1), and the central axis of the driven shaft (402) is parallel to the central axis of the atomizing cup (1); bevel gears (405) are arranged on the driving shaft (401) and the driven shaft (402), and the two bevel gears (405) are engaged with each other; a gear ring (406) is coaxially arranged on the inner ring of the bearing (6), and the gear (404) and the gear ring (406) are always engaged.

6. The atomizing mechanism for a plasma mass spectrometer of claim 3, wherein: The second conical tube (203) is also provided with a driving mechanism (7) which can be controlled by airflow to drive the second conical tube (203) to rotate.

7. The atomizing mechanism for a plasma mass spectrometer of claim 6, wherein: The driving mechanism (7) comprises a disc (701) fixedly arranged in the second conical tube (203), a connecting shaft (702) arranged on the disc (701), and a second impeller (703) arranged on the connecting shaft (702), the central axis of the disc (701) and the central axis of the connecting shaft (702) are both collinear with the central axis of the second conical tube (203); a plurality of through holes are formed in the disc (701).

8. The atomizing mechanism for a plasma mass spectrometer of claim 3, wherein: An exhaust through hole is formed in the atomizing cup (1), and the exhaust through hole is arranged close to the baffle (202); the atomizing nozzle (5) is arranged in the exhaust through hole.

9. The atomizing mechanism for a plasma mass spectrometer of claim 7, wherein: The outer wall and the inner wall of the second conical tube (203) are both provided with a plurality of mist outlet grooves (8), and any mist outlet groove (8) extends along the length direction of the second conical tube (203).

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