Corrosion-resistant fog chamber structure for ICP spectrometer

Abstract

The utility model belongs to the technical field of ICP spectrometers, and discloses a corrosion-resistant fog chamber structure for an ICP spectrograph, the corrosion-resistant fog chamber structure comprises a fog chamber outer pipe and a fog chamber inner pipe arranged in the fog chamber outer pipe, the top of the fog chamber outer pipe is provided with a sample outlet pipe which is in threaded connection with the fog chamber outer pipe and is sealed, and one end, far away from the fog chamber outer pipe, of the sample outlet pipe is communicated with a rectangular pipe; the two ends of the mist chamber outer pipe are in threaded connection with a mist chamber cover and a tail end cover respectively, the liquid inlet end of the mist chamber inner pipe penetrates through the mist chamber cover and is matched with the mist chamber cover in an inserted mode, and the liquid inlet end of the mist chamber inner pipe is communicated with the liquid outlet end of the atomizer. In the fog chamber structure, the fog chamber outer pipe, the fog chamber inner pipe, the sample outlet pipe, the fog chamber cover and the tail end cover are all made of polysulfone materials, so that the fog chamber structure has the advantages of high hardness, high impact strength, no toxicity, heat resistance, cold resistance, aging resistance, acid and alkali corrosion resistance and the like, has excellent corrosion resistance to a sample solution taking hydrofluoric acid as a solvent, and expands the application range of the fog chamber structure; and the service life of the fog chamber structure is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of ICP spectrometers, and particularly relates to a corrosion-resistant spray chamber structure for an ICP spectrometer. Background Technique

[0002] An inductively coupled plasma emission spectrometer (hereinafter referred to as ICP) is an instrument for elemental analysis. It uses inductively coupled plasma technology to excite elements with high energy to emit light waves of specific wavelengths, and then analyzes the emission spectrum to accurately determine the types and contents of elements in a sample.

[0003] When using ICP for elemental analysis, it is required that the test sample must be provided in a solution state. Considering factors such as high temperature resistance, corrosion resistance, electrical insulation, and easy cleaning, most components of its sample introduction system (torch tube, nebulizer, spray chamber, etc.) are made of quartz glass, which can meet the usage requirements in most cases.

[0004] The utility model patent of CN212180629U publicly disclosed in China discloses a cooling spray chamber for an inductively coupled plasma emission spectrometer. The cooling spray chamber includes a spray chamber and a housing. The housing hermetically wraps the spray chamber. A liquid can flow between the housing and the spray chamber. The spray chamber is provided with a quartz torch tube connection port, a waste liquid discharge port, and a nebulizer insertion port.

[0005] In the above spray chamber, the spray chamber, the housing, the quartz torch tube connection port, and the nebulizer insertion port are usually made of quartz materials and are usually formed into a whole by fusion welding. When any one of the structures in the spray chamber or the housing is damaged, the entire spray chamber structure needs to be replaced, resulting in a certain waste of resources. Therefore, it is necessary to improve and design the related technology. Content of the Utility Model

[0006] In order to solve the above problems, the utility model provides a corrosion-resistant spray chamber structure for an ICP spectrometer.

[0007] The above technical purpose of the utility model is achieved through the following technical solutions: A corrosion-resistant spray chamber structure for an ICP spectrometer includes an outer spray chamber tube and an inner spray chamber tube disposed inside the outer spray chamber tube. A sample outlet tube that is threadedly connected to and sealed with the outer spray chamber tube is provided at the top of the outer spray chamber tube. The end of the sample outlet tube away from the outer spray chamber tube is communicated with a torch tube. Mist chamber covers and end caps are threadedly connected to both ends of the outer spray chamber tube respectively. The liquid inlet end of the inner spray chamber tube penetrates through the mist chamber cover and is in plug-in fit with the mist chamber cover. The liquid inlet end of the inner spray chamber tube is communicated with the liquid outlet end of a nebulizer.

[0008] By adopting the above technical solution, the outer fog chamber tube is threadedly connected to both the tail end cover and the tail end cover, the sample outlet tube is threadedly connected to the outer fog chamber tube, and the liquid inlet end of the inner fog chamber tube is inserted and fitted with the fog chamber cover, changing the connection method of welding between components in the traditional technology. When any one of the components is damaged, it can be replaced separately, reducing the use cost of the fog chamber structure. The outer fog chamber tube, the inner fog chamber tube, the sample outlet tube, the fog chamber cover and the tail end cover are all made of polysulfone material. The polysulfone material has the advantages of high hardness, high impact strength, non-toxicity, heat resistance, cold resistance, aging resistance, acid and alkali corrosion resistance, etc., and has excellent corrosion resistance to the sample solution with hydrofluoric acid as the solvent, expanding the applicable range of the fog chamber structure and being beneficial to extending the service life of the fog chamber structure.

[0009] Further, a cushion block is arranged inside the outer fog chamber tube and is attached to the inner bottom wall of the outer fog chamber tube. An arc-shaped groove is arranged at the top of the cushion block and is attached to the bottom of the inner fog chamber tube. A fastening bolt that is in clearance fit with the outer fog chamber tube is arranged through the bottom of the outer fog chamber tube. The fastening bolt penetrates through the cushion block and is threadedly connected to the cushion block, and a rubber sheet is fixed at the upper end of the fastening bolt.

[0010] By adopting the above technical solution, the setting of the cushion block plays a good supporting role for the inner fog chamber tube and enhances the stability of the inner fog chamber tube during use. The setting of the fastening bolt facilitates the staff to detachably install the cushion block inside the outer fog chamber tube.

[0011] Further, a receiving groove that cooperates with the top of the cushion block is arranged at the bottom of the inner fog chamber tube.

[0012] By adopting the above technical solution, the supporting stability of the cushion block for the inner fog chamber tube is enhanced.

[0013] Further, the sample outlet tube and the rectangular tube are connected by a hose, and an anti-detachment ring is integrally formed on the outer wall of the sample outlet tube.

[0014] By adopting the above technical solution, the setting of the anti-detachment ring reduces the probability of detachment after the connection between the hose and the sample outlet tube.

[0015] Further, a residual liquid discharge tube that is threadedly connected and sealed to the outer fog chamber tube is arranged at the bottom of the outer fog chamber tube, and the residual liquid discharge tube is located at a position close to the liquid outlet end of the inner fog chamber tube.

[0016] By adopting the above technical solution, the setting of the residual liquid discharge tube and the limitation of its position facilitate the discharge of accumulated liquid.

[0017] Further, the fog chamber cover and the outer fog chamber tube are kept sealed by an O-ring, and an annular anti-slip strip is integrally formed on the outer wall of the fog chamber cover.

[0018] Furthermore, a drainage slope is provided at the intersection between the end of the inner pipe in the fog chamber, which is far from the fog chamber cover, and the inner bottom wall of the inner pipe in the fog chamber.

[0019] Furthermore, an outer ring that fits the inner wall of the outer pipe of the fog chamber is provided inside the outer pipe of the fog chamber. A plurality of connecting rods are integrally formed on the inner wall of the outer ring. The ends of the plurality of connecting rods are commonly fixed with an inner ring. The inner wall of the inner ring fits the outer wall of the inner pipe in the fog chamber. Fillets are provided at the intersections between the outer wall of the outer ring and the side walls on both sides of the outer ring.

[0020] By adopting the above technical solutions, the outer ring, the connecting rods and the inner ring cooperate with each other, thereby ensuring the stability of the inner pipe in the fog chamber during use. In this embodiment, the plurality of connecting rods are mainly concentrated at the bottom of the outer pipe of the fog chamber, reducing the probability of generating a flow obstruction to the atomized aerosol.

[0021] In summary, the present utility model has the following beneficial effects:

[0022] 1. In the present application, the outer pipe of the fog chamber is threadedly connected to both the tail end cover and the tail end cover, the sample outlet pipe is threadedly connected to the outer pipe of the fog chamber, and the liquid inlet end of the inner pipe in the fog chamber is inserted and matched with the fog chamber cover, changing the connection method of welding between the components in the traditional technology. When any one of the components is damaged, it can be replaced separately, reducing the use cost of the fog chamber structure. The outer pipe of the fog chamber, the inner pipe in the fog chamber, the sample outlet pipe, the fog chamber cover and the tail end cover are all made of polysulfone material. The polysulfone material has the advantages of high hardness, high impact strength, non-toxic, heat-resistant, cold-resistant, aging-resistant, acid and alkali corrosion-resistant, etc., and has excellent corrosion resistance to the sample solution with hydrofluoric acid as the solvent, expanding the applicable range of the fog chamber structure and being beneficial to extending the service life of the fog chamber structure;

[0023] 2. In the present application, the setting of the cushion block plays a good supporting role for the inner pipe in the fog chamber, enhancing the stability of the inner pipe in the fog chamber during use. The setting of the fastening bolt facilitates the staff to detachably install the cushion block inside the outer pipe of the fog chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is the overall structural schematic diagram of the embodiment of the present utility model;

[0025] Figure 2 is the internal structural schematic diagram of the embodiment of the present utility model for highlighting the outer pipe of the fog chamber;

[0026] Figure 3 is Figure 1 the cross-sectional view of;

[0027] Figure 4 is Figure 3 the enlarged schematic view of part A in;

[0028] Figure 5It is a schematic structural diagram of Embodiment 2 of the present utility model;

[0029] Figure 6 It is a schematic structural diagram of Embodiment 3 of the present utility model.

[0030] In the figure: 1. Outer fog chamber tube; 2. Inner fog chamber tube; 21. Drainage inclined plane; 22. Accommodation groove; 3. Specimen outlet tube; 31. Anti - detachment ring; 4. Fog chamber cover; 41. Annular anti - slip strip; 5. Tail end cover; 6. Spacer block; 61. Arc - shaped groove; 62. Fastening bolt; 7. Residual liquid discharge tube; 8. O - ring; 9. Outer ring; 91. Connecting rod; 911. Inner ring; 92. Rounded corner. Specific embodiments

[0031] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application; obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0032] Embodiment 1

[0033] As Figures 1-4 shown, the present application embodiment discloses a corrosion - resistant fog chamber structure for an ICP spectrometer, including an outer fog chamber tube 1 and an inner fog chamber tube 2 disposed inside the outer fog chamber tube 1. A specimen outlet tube 3 that is thread - connected and sealed to the outer fog chamber tube 1 (using the measure of silicone - assisted sealing in the prior art) is provided at the top of the outer fog chamber tube 1. One end of the specimen outlet tube 3 away from the outer fog chamber tube 1 is communicated with a rectangular tube (a common component in an ICP spectrometer, not shown in the figure). The two ends of the outer fog chamber tube 1 are respectively thread - connected with a fog chamber cover 4 and a tail end cover 5. The liquid inlet end of the inner fog chamber tube 2 penetrates through the fog chamber cover 4 and is in plug - fit with the fog chamber cover 4. The liquid inlet end of the inner fog chamber tube 2 is communicated with the liquid outlet end of an atomizer (a common component in an ICP spectrometer, not shown in the figure).

[0034] The outer fog chamber tube 1 is thread - connected to both the fog chamber cover 4 and the tail end cover 5, the specimen outlet tube 3 is thread - connected to the outer fog chamber tube 1, and the liquid inlet end of the inner fog chamber tube 2 is in plug - fit with the fog chamber cover 4, changing the traditional connection method of welding between components. When any one of the components is damaged, it can be replaced separately, reducing the use cost of the fog chamber structure. The outer fog chamber tube 1, the inner fog chamber tube 2, the specimen outlet tube 3, the fog chamber cover 4, and the tail end cover 5 are all made of polysulfone material. The polysulfone material has the advantages of high hardness, high impact strength, non - toxicity, heat resistance, cold resistance, aging resistance, acid - alkali corrosion resistance, etc., and has excellent corrosion resistance to specimen solutions with hydrofluoric acid as the solvent, expanding the applicable range of the fog chamber structure and being beneficial to extending the service life of the fog chamber structure.

[0035] A spacer 6 that fits against the inner bottom wall of the outer fog chamber tube 1 is provided inside the outer fog chamber tube 1. An arc-shaped groove 61 that fits against the bottom of the inner fog chamber tube 2 is provided at the top of the spacer 6. A fastening bolt 62 that is in clearance fit with the outer fog chamber tube 1 is provided through the bottom of the outer fog chamber tube 1. The fastening bolt 62 passes through the spacer 6 and is threadedly connected to the spacer 6. A rubber sheet (not shown in the figure) is fixed to the upper end of the fastening bolt 62. The provision of the spacer 6 provides good support for the inner fog chamber tube 2 and enhances the stability of the inner fog chamber tube 2 during use. The provision of the fastening bolt 62 facilitates the detachable installation of the spacer 6 inside the outer fog chamber tube 1.

[0036] In this embodiment, the sample outlet tube 3 and the rectangular tube are connected by a flexible hose (not shown in the figure). To reduce the probability of detachment after the connection between the flexible hose and the sample outlet tube 3, an anti-detachment ring 31 is integrally formed on the outer wall of the sample outlet tube 3.

[0037] A residual liquid discharge tube 7 that is threadedly connected and sealed to the outer fog chamber tube 1 is provided at the bottom of the outer fog chamber tube 1. The residual liquid discharge tube 7 is located near the liquid outlet end of the inner fog chamber tube 2. The provision of the residual liquid discharge tube 7 and the limitation of its position facilitate the discharge of accumulated liquid (during the long-term use of the fog chamber structure of the ICP spectrometer, some accumulated liquid may be generated, which may affect the normal use if not discharged in time). In addition, to further facilitate the discharge of accumulated liquid, a drainage slope 21 is provided at the intersection between the end of the inner fog chamber tube 2 away from the fog chamber cover 4 and the inner bottom wall of the inner fog chamber tube 2.

[0038] In this embodiment, the fog chamber cover 4 and the outer fog chamber tube 1 are kept sealed by an O-ring 8. An annular anti-slip strip 41 is integrally formed on the outer wall of the fog chamber cover 4.

[0039] The working principle of a corrosion-resistant fog chamber structure for an ICP spectrometer in this embodiment is as follows: The outer fog chamber tube 1 is threadedly connected to both the end cover 5 and the end cover 5 at the tail end. The sample outlet tube 3 is threadedly connected to the outer fog chamber tube 1. The liquid inlet end of the inner fog chamber tube 2 is in plug-in fit with the fog chamber cover 4, changing the traditional connection method of welding between components. When any one of the components is damaged, it can be replaced separately, reducing the use cost of the fog chamber structure. The outer fog chamber tube 1, the inner fog chamber tube 2, the sample outlet tube 3, the fog chamber cover 4, and the end cover 5 are all made of polysulfone material. The polysulfone material has the advantages of high hardness, high impact strength, non-toxicity, heat resistance, cold resistance, aging resistance, acid and alkali corrosion resistance, etc., and has excellent corrosion resistance to sample solutions with hydrofluoric acid as the solvent, expanding the applicable range of the fog chamber structure and being conducive to extending the service life of the fog chamber structure.

[0040] Embodiment 2

[0041] As Figure 5As shown, the difference between this embodiment and Embodiment 1 is only that: a receiving groove 22 is provided at the bottom of the inner tube 2 of the fog chamber, which enhances the support stability of the cushion block 6 for the inner tube 2 of the fog chamber.

[0042] Embodiment 3

[0043] As Figure 6 shown, the difference between this embodiment and Embodiment 1 is only that: an outer ring 9 is provided inside the outer tube 1 of the fog chamber, and the outer ring 9 is integrally formed with a plurality of connecting rods 91 on the inner wall. The ends of the plurality of connecting rods 91 are commonly fixed with an inner ring 911. The inner wall of the inner ring 911 is in contact with the outer wall of the inner tube 2 of the fog chamber, and rounded corners 92 are formed at the intersections between the outer wall of the outer ring 9 and the side walls on both sides of the outer ring 9 (this embodiment replaces the setting method of the cushion block 6 and the fastening bolt 62). The outer ring 9, the connecting rods 91 and the inner ring 911 cooperate to ensure the stability of the inner tube 2 of the fog chamber during use. In this embodiment, the plurality of connecting rods 91 are mainly concentrated at the bottom of the outer tube 1 of the fog chamber, reducing the probability of generating a flow obstruction to the atomized aerosol.

[0044] The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A corrosion-resistant spray chamber structure for an ICP spectrometer, characterized in that: It includes an outer fog chamber tube (1) and an inner fog chamber tube (2) arranged inside the outer fog chamber tube (1). A sample outlet tube (3) which is threadedly connected and sealed with the outer fog chamber tube (1) is arranged at the top of the outer fog chamber tube (1). One end of the sample outlet tube (3) far away from the outer fog chamber tube (1) is communicated with a rectangular tube. The two ends of the outer fog chamber tube (1) are respectively threadedly connected with a fog chamber cover (4) and a tail end cover (5). The liquid inlet end of the inner fog chamber tube (2) penetrates through the fog chamber cover (4) and is in plug-in fit with the fog chamber cover (4). The liquid inlet end of the inner fog chamber tube (2) is communicated with the liquid outlet end of an atomizer.

2. The corrosion-resistant spray chamber structure for an ICP spectrometer according to claim 1, characterized in that: A cushion block (6) which fits with the inner bottom wall of the outer fog chamber tube (1) is arranged inside the outer fog chamber tube (1). An arc-shaped groove (61) which fits with the bottom of the inner fog chamber tube (2) is arranged at the top of the cushion block (6). A fastening bolt (62) which has a clearance fit with the outer fog chamber tube (1) is arranged through the bottom of the outer fog chamber tube (1). The fastening bolt (62) penetrates through the cushion block (6) and is threadedly connected with the cushion block (6). A rubber sheet is fixed at the upper end of the fastening bolt (62).

3. The corrosion-resistant spray chamber structure for an ICP spectrometer according to claim 2, characterized in that: A receiving groove (22) which is matched with the top of the cushion block (6) is arranged at the bottom of the inner fog chamber tube (2).

4. The corrosion-resistant spray chamber structure for an ICP spectrometer according to claim 2, characterized in that: The sample outlet tube (3) and the rectangular tube are connected by a hose. An anti-disconnection ring (31) is integrally formed on the outer wall of the sample outlet tube (3).

5. The corrosion-resistant spray chamber structure for an ICP spectrometer according to claim 4, characterized in that: A residual liquid discharge tube (7) which is threadedly connected and sealed with the outer fog chamber tube (1) is arranged at the bottom of the outer fog chamber tube (1). The residual liquid discharge tube (7) is located at a position close to the liquid outlet end of the inner fog chamber tube (2).

6. The corrosion-resistant spray chamber structure for an ICP spectrometer according to claim 4, wherein: The fog chamber cover (4) and the outer fog chamber tube (1) are kept sealed by an O-ring (8). An annular anti-slip strip (41) is integrally formed on the outer wall of the fog chamber cover (4).

7. The corrosion-resistant spray chamber structure for an ICP spectrometer according to claim 5, characterized in that: A drainage slope (21) is arranged at the intersection between the end of the inner fog chamber tube (2) far away from the fog chamber cover (4) and the inner bottom wall of the inner fog chamber tube (2).

8. The corrosion-resistant spray chamber structure for an ICP spectrometer according to claim 1, characterized in that: An outer ring (9) which fits with the inner wall of the outer fog chamber tube (1) is arranged inside the outer fog chamber tube (1). A plurality of connecting rods (91) are integrally formed on the inner wall of the outer ring (9). The ends of the plurality of connecting rods (91) are jointly fixed with an inner ring (911). The inner wall of the inner ring (911) fits with the outer wall of the inner fog chamber tube (2). Fillets (92) are formed at the intersections between the outer wall of the outer ring (9) and the side walls on both sides of the outer ring (9).

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