Inductively coupled plasma emission spectrometer convenient to clean

Abstract

The utility model discloses an inductive coupling plasma emission spectrometer convenient to clean, which comprises a main case, a sample chamber, a sample introduction pipe, a cleaning assembly and a waste gas treatment module, the main case is of a rectangular box structure, a partition plate is arranged in the main case to divide the main case into an upper part and a lower part, the upper part is a main analysis cavity, and the lower part is an auxiliary cavity; the sample chamber is fixed in the middle of the main analysis cavity, the top of the sample chamber is connected with an external sample supply system through a sample injection pipe, the sample injection pipe penetrates through the top wall of the main machine shell and is in sealed connection with the main machine shell, and the cleaning assembly is installed in the main analysis cavity and located on the periphery of the sample chamber and comprises an annular guide rail, a spraying set, a rotating arm and a driving mechanism; the annular guide rail is fixed to the inner wall of the main analysis cavity and surrounds the outer side of the sample chamber, the section of the annular guide rail is T-shaped, the spraying set is driven by the annular guide rail and the rotating arm to conduct all-directional cleaning on the sample chamber, and the cleaning efficiency and the cleaning effect are improved.

Description

Technical Field

[0001] This utility model relates to the field of plasma emission spectrometry technology, specifically to an inductively coupled plasma emission spectrometer that is easy to clean. Background Technology

[0002] Inductively coupled plasma atomic emission spectrometry (ICP-AES) is mainly used for the quantitative analysis of metallic and some non-metallic elements in liquid samples (including solid samples that can be chemically treated into solutions). In ICP-AES, the sample solution is first introduced into the plasma torch in aerosol form. The sample is evaporated and excited, emitting light of the characteristic wavelengths of its constituent elements. After dispersion by a spectrophotometer, the spectral line intensities are received by photoelectric elements and converted into electrical signals, which are then recorded. Based on the relationship between element concentration and spectral line intensity, the content of each corresponding element in the sample is determined. It is mainly used for the detection of heavy metals and cosmetics. Currently, existing ICP-AES instruments are cleaned primarily using an externally mounted, rotatable cleaning device, with waste discharged via a pump. This device can only hold a small amount of sample solution, leading to inaccurate data when large quantities of samples need to be analyzed. Furthermore, manual removal of the sample is required, resulting in low cleaning efficiency. Additionally, residual gases inside the instrument can cause harm to users when it is opened. Therefore, there is an urgent need for an ICP-AES instrument that is easier to clean. Utility Model Content

[0003] The purpose of this invention is to provide an inductively coupled plasma atomic emission spectrometer that is easy to clean, so as to solve the above-mentioned technical problems.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an inductively coupled plasma atomic emission spectrometer (ICP-AES) that is easy to clean, comprising a main housing, a sample chamber, a sample inlet tube, a cleaning assembly, and a waste gas treatment module. The main housing is a rectangular box structure, with an internal partition plate dividing the main housing into upper and lower parts. The upper part is the main analytical chamber, and the lower part is an auxiliary chamber. The sample chamber is fixed in the middle of the main analytical chamber, and the top of the sample chamber is connected to an external sample supply system through the sample inlet tube. The sample inlet tube penetrates the top wall of the main housing and is sealed to it. The cleaning assembly is installed inside the main analytical chamber and located outside the sample chamber. The cleaning assembly includes an annular guide rail, a spray assembly, a rotating arm, and a drive mechanism. The annular guide rail is fixed to the inner wall of the main analytical chamber and surrounds the outer side of the sample chamber. The annular guide rail has a T-shaped cross-section and an annular flow channel inside. The two ends of the annular flow channel are connected to a cleaning liquid storage tank and a waste liquid recovery tank, respectively.

[0005] Preferably, the spray assembly includes several spray heads evenly distributed along the circumference of the annular guide rail. Each spray head has a slider at its bottom, which is embedded in the T-shaped groove of the annular guide rail and slides with it. The top of the spray head is connected to the annular flow channel through a flexible hose.

[0006] Preferably, one end of the rotating arm is fixedly connected to the spray assembly, and the other end is connected to the drive mechanism. The drive mechanism is fixed to the inner wall of the main analysis chamber and located below the annular guide rail.

[0007] Preferably, the waste gas treatment module includes a waste gas collection hood, a filter unit, and an exhaust pipe. The waste gas collection hood is fixed to the top wall of the main analysis chamber and covers the area above the sample chamber. The waste gas collection hood is connected to the filter unit through the exhaust pipe, and the filter unit is fixed in the auxiliary chamber.

[0008] Preferably, each of the spray heads is provided with an adjustment valve at the top of the spray head. The adjustment valve is connected to the control panel on the outer wall of the main unit housing via a control cable. The bottom slider of the spray head is embedded with a ball bearing to reduce frictional resistance.

[0009] Preferably, the driving mechanism includes a stepper motor, a transmission gear, and a gear ring. The stepper motor is fixed to the inner wall of the main analysis chamber, the transmission gear is fixedly connected to the output shaft of the stepper motor, and the gear ring is fixed to the inner side of the rotating arm and meshes with the transmission gear.

[0010] Preferably, the exhaust gas collection hood is in the shape of an inverted frustum, and the inner wall of the exhaust gas collection hood is provided with spiral guide ribs.

[0011] Preferably, the filtration unit includes a primary filter, an activated carbon adsorption layer, and a HEPA filter, which are arranged sequentially along the airflow direction. The primary filter is made of metal wire mesh, and the activated carbon adsorption layer has a thickness of 3cm to 5cm.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. The spray system, driven by a ring guide rail and rotating arm, performs comprehensive cleaning of the sample chamber, improving cleaning efficiency and effectiveness while avoiding safety hazards associated with manual operation. 2. The exhaust gas treatment module employs a multi-stage filtration design to effectively remove harmful substances from the exhaust gas, protecting the health of users. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is an overall schematic diagram of an easily cleanable inductively coupled plasma atomic emission spectrometer according to this embodiment;

[0016] Figure 2 This is a rear view of the annular guide rail of an inductively coupled plasma emission spectrometer that is easy to clean, according to this embodiment.

[0017] Figure 3 This is a circular flow path diagram of an easily cleanable inductively coupled plasma atomic emission spectrometer according to this embodiment;

[0018] Figure 4 This is a diagram of the filter unit of an inductively coupled plasma atomic emission spectrometer that is easy to clean, according to this embodiment.

[0019] The attached diagram lists the components represented by each number as follows:

[0020] 1. Main unit housing; 2. Sample chamber; 3. Sample inlet tube; 4. Cleaning assembly; 5. Waste gas treatment module; 6. Divider plate; 7. Main analysis chamber; 8. Auxiliary chamber; 9. Annular guide rail; 10. Spray assembly; 11. Rotating arm; 12. Drive mechanism; 13. Annular flow channel; 14. Cleaning solution storage tank; 15. Waste liquid recovery tank; 16. Spray head; 17. Slider; 18. T-shaped groove; 19. Waste gas collection hood; 20. Filter unit; 21. Exhaust pipe; 22. Regulating valve; 24. Ball bearing; 25. Stepper motor; 26. Transmission gear; 27. Gear ring; 28. Spiral guide rib; 29. ​​Primary filter; 30. Activated carbon adsorption layer; 31. HEPA filter. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-4This utility model provides a technical solution: an inductively coupled plasma atomic emission spectrometer that is easy to clean, including a main housing 1, a sample chamber 2, a sample inlet tube 3, a cleaning assembly 4, and a waste gas treatment module 5. The main housing 1 is a rectangular box structure, and its interior is provided with a partition plate 6 to divide the main housing 1 into upper and lower parts. The upper part is the main analysis chamber 7, and the lower part is the auxiliary chamber 8. The sample chamber 2 is fixed in the middle of the main analysis chamber 7. The top of the sample chamber 2 is connected to an external sample supply system through the sample inlet tube 3. The sample inlet tube 3 penetrates the top wall of the main housing 1 and is sealed to it. The cleaning assembly 4 is installed in the main analysis chamber 7 and located on the periphery of the sample chamber 2. The cleaning assembly 4 includes an annular guide rail 9, a spray group 10, a rotating arm 11, and a drive mechanism 12. The annular guide rail 9 is fixed to the inner wall of the main analysis chamber 7 and surrounds the outer side of the sample chamber 2. The cross-section of the annular guide rail 9 is T-shaped, and an annular flow channel 13 is opened inside it. The two ends of the annular flow channel 13 are respectively connected to a cleaning liquid storage tank 14 and a waste liquid recovery tank 15.

[0023] Specifically, the spray assembly 10 includes several spray heads 16 evenly distributed around the annular guide rail 9. Each spray head 16 has a slider 17 at its bottom, which is embedded in the T-shaped groove 18 of the annular guide rail 9 and slides with it. The top of the spray head 16 is connected to the annular flow channel 13 through a hose. One end of the rotating arm 11 is fixedly connected to the spray assembly 10, and the other end is connected to the drive mechanism 12. The drive mechanism 12 is fixed to the inner wall of the main analysis chamber 7 and located below the annular guide rail 9. The exhaust gas treatment module 5 includes an exhaust gas collection hood 19, a filter unit 20, and an exhaust pipe 21. The exhaust gas collection hood 19 is fixed to the top wall of the main analysis chamber 7 and covers the area above the sample chamber 2. The exhaust gas collection hood 19 is connected to the filter unit 20 through the exhaust pipe 21. The filter unit 20 is fixed in the auxiliary chamber 8. With the above configuration, the spray heads 16 can move around the annular guide rail 9 to clean the sample chamber 2 in all directions, improving cleaning efficiency and cleaning quality. One end of the rotating arm 11 is connected to the drive mechanism 12, and the other end is fixedly connected to the spray assembly 10. The drive mechanism 12 drives the rotating arm 11 to rotate the spray assembly 10 around the sample chamber 2, which further enhances the cleaning effect.

[0024] Specifically, each spray head 16 is equipped with an adjusting valve 22 at its top. The adjusting valve 22 is connected to the control panel on the outer wall of the main housing 1 via a control cable. A ball bearing 24 is embedded in the slider 17 at the bottom of the spray head 16 to reduce frictional resistance. Through these settings, the spray angle and flow rate of the spray head 16 can be adjusted according to actual needs, enhancing the flexibility and precision of cleaning. Simultaneously, the embedded ball bearing 24 significantly reduces the frictional resistance of the slider 17 when moving on the annular guide rail 9, making the movement of the spray assembly 10 smoother and further improving cleaning efficiency.

[0025] Specifically, the drive mechanism 12 includes a stepper motor 25, a transmission gear 26, and a gear ring 27. The stepper motor 25 is fixed to the inner wall of the main analysis chamber 7, the transmission gear 26 is fixedly connected to the output shaft of the stepper motor 25, and the gear ring 27 is fixed to the inner side of the rotating arm 11 and meshes with the transmission gear 26. Through the above arrangement, the stepper motor 25 can drive the transmission gear 26 to rotate, and the transmission gear 26 drives the rotating arm 11 to rotate through the meshing action with the gear ring 27, thereby realizing the rotation cleaning of the spray group 10.

[0026] Specifically, the exhaust gas collection hood 19 is in the shape of an inverted frustum, and the inner wall of the exhaust gas collection hood 19 is provided with spiral guide ribs 28. Through the above arrangement, the exhaust gas can rotate and flow along the spiral guide ribs 28 inside the exhaust gas collection hood 19, which increases the residence time of the exhaust gas inside the exhaust gas collection hood 19, thereby increasing the contact area and contact time between the exhaust gas and the filter unit 20, enhancing the purification effect of the exhaust gas. The inverted frustum design also allows the exhaust gas collection hood 19 to better cover the area above the sample chamber 2, avoiding the leakage and diffusion of exhaust gas, and further improving the environmental performance and safety of the instrument.

[0027] Specifically, the filtration unit 20 includes a primary filter 29, an activated carbon adsorption layer 30, and a HEPA filter 31. The primary filter 29, activated carbon adsorption layer 30, and HEPA filter 31 are arranged sequentially along the airflow direction. The primary filter 29 is made of metal wire mesh, and the activated carbon adsorption layer 30 has a thickness of 3cm to 5cm. Through the above arrangement, the exhaust gas first passes through the primary filter 29 for preliminary filtration, removing larger particles and impurities. Then, it passes through the activated carbon adsorption layer 30 for deep purification, which can effectively adsorb harmful gases and odors in the exhaust gas. Finally, it passes through the HEPA filter 31 for fine filtration, removing tiny particles and bacteria, ensuring that the emitted gas meets national environmental protection standards. Through the above multi-filtration design, the purification efficiency and quality of the exhaust gas are greatly improved, protecting the health of operators and the safety of the surrounding environment.

[0028] A specific application example of this embodiment is as follows:

[0029] When in use, the sample chamber 2 inside the main housing 1 is used to place the sample to be tested. The sample inlet tube 3 delivers the sample solution into the sample chamber 2. When cleaning is required, the stepper motor 25 drives the transmission gear 26 to rotate. The transmission gear 26 drives the rotating arm 11 to rotate through the gear ring 27. The rotating arm 11 drives the spray assembly 10 to move circumferentially along the annular guide rail 9. The cleaning liquid flows from the cleaning liquid storage tank 14 into the annular flow channel 13 and enters the spray head 16 through the hose. The spray head 16 cleans the sample chamber 2 in all directions. The waste liquid after cleaning is discharged through the waste liquid recovery tank 15. The waste gas collection hood 19 collects the waste gas generated in the sample chamber 2. After being guided by the spiral guide rib 28, the waste gas enters the exhaust pipe 21 and undergoes multi-stage filtration treatment through the primary filter 29, the activated carbon adsorption layer 30, and the HEPA filter 31 in sequence, and finally discharges clean gas.

[0030] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that modifications may be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An inductively coupled plasma optical emission spectrometer that facilitates cleaning, characterized by: The utility model relates to a kind of automatic cleaning system of sample chamber, including host shell (1), sample chamber (2), sample tube (3), cleaning assembly (4) and waste gas treatment module (5), the host shell (1) is rectangular box structure, its inside is equipped with partition plate (6) and is divided into upper and lower two parts by host shell (1), upper part is main analysis cavity (7), lower part is auxiliary cavity (8), the sample chamber (2) is fixed in main analysis cavity (7) middle part, sample chamber (2) top is connected with external sample supply system by sample tube (3), sample tube (3) penetrates host shell (1) top wall and is sealedly connected with it, the cleaning assembly (4) is installed in main analysis cavity (7) and is located sample chamber (2) periphery, cleaning assembly (4) includes annular guide rail (9), spray group (10), rotating arm (11) and drive mechanism (12);The annular guide rail (9) is fixed to the inner wall of main analysis cavity (7) and is arranged around the outside of sample chamber (2), the cross section of annular guide rail (9) is T-shaped, its inside is provided with annular flow channel (13), annular flow channel (13) both ends are connected with cleaning fluid storage tank (14) and waste liquid recovery tank (15) respectively.

2. The inductively coupled plasma optical emission spectrometer of claim 1, wherein: The spray group (10) includes several spray heads (16) evenly distributed along the circumference of the annular guide rail (9), each spray head (16) is provided with a sliding block (17) at the bottom, the sliding block (17) is embedded in the T-shaped slot (18) of the annular guide rail (9) and is in sliding fit with it, the top of the spray head (16) is communicated with the annular flow channel (13) through a hose.

3. The inductively coupled plasma optical emission spectrometer of claim 1, wherein: The rotating arm (11) is fixedly connected with the spray group (10) at one end and is in transmission connection with the drive mechanism (12) at the other end, and the drive mechanism (12) is fixed to the inner wall of the main analysis cavity (7) and is located below the annular guide rail (9).

4. The inductively coupled plasma optical emission spectrometer of claim 1, wherein: The waste gas treatment module (5) includes a waste gas collection cover (19), a filter unit (20), and an exhaust pipeline (21). The waste gas collection cover (19) is fixed to the top wall of the main analysis cavity (7) and covers the area above the sample chamber (2). The waste gas collection cover (19) is connected to the filter unit (20) through the exhaust pipeline (21). The filter unit (20) is fixed in the auxiliary cavity (8).

5. The inductively coupled plasma optical emission spectrometer of claim 2, wherein: Each spray head (16) is provided with an adjusting valve (22) at the top. The adjusting valve (22) is connected to the control panel on the outer wall of the host shell (1) through a control cable. The sliding block (17) at the bottom of the spray head (16) is embedded with a ball (24) to reduce friction resistance.

6. The inductively coupled plasma optical emission spectrometer of claim 1, wherein: The drive mechanism (12) includes a stepper motor (25), a transmission gear (26), and a gear ring (27). The stepper motor (25) is fixed to the inner wall of the main analysis cavity (7). The transmission gear (26) is fixedly connected to the output shaft of the stepper motor (25). The gear ring (27) is fixed to the inner side of the rotating arm (11) and is in meshing engagement with the transmission gear (26).

7. The inductively coupled plasma optical emission spectrometer of claim 4, wherein: The waste gas collection cover (19) is in the shape of an inverted circular truncated cone. The inner wall of the waste gas collection cover (19) is provided with spiral flow guide ribs (28).

8. The inductively coupled plasma optical emission spectrometer of claim 4, wherein: The filter unit (20) comprises a primary filter (29), an activated carbon adsorption layer (30) and a HEPA filter (31), which are sequentially arranged along the airflow direction, the primary filter (29) is made of metal wire mesh material, and the activated carbon adsorption layer (30) has a thickness of 3-5 cm.

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