Novel corrosion-resistant rectangular tube structure

Abstract

The utility model belongs to the technical field of ICP spectrometers, and discloses a novel corrosion-resistant rectangular tube structure which comprises an outer tube and a middle tube which is coaxially arranged and fixed with the outer tube, a plasma gas inlet tube is fixed and communicated to the outer tube, an auxiliary gas inlet tube which penetrates through the outer tube and is communicated with the middle tube is further fixed to the outer tube, and the middle tube is communicated with the plasma gas inlet tube. One end of the middle tube is provided with an atomizer joint which is matched with the middle tube in an inserting manner and is made of polytetrafluoroethylene, and a zirconium oxide core tube is inserted into one side, far away from the feeding end of the atomizer joint, of the atomizer joint. According to the rectangular tube structure, the atomizer connector is made of polytetrafluoroethylene, the core tube is made of a zirconium oxide material, the atomizer connector and the zirconium oxide core tube both make contact with an atomized sample solution and both have good corrosion resistance, the outer tube and the middle tube do not make contact with the corrosive sample solution, and the service life of the rectangular tube structure can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of ICP spectrometers, and particularly relates to a novel corrosion-resistant torch tube structure. Background Art

[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 at 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] Imported ICP torch tubes are composed of three concentric quartz tubes, and all have three gas inlet pipes, respectively introducing three gas flows: cooling gas, auxiliary gas, and carrier gas. The basic requirement for ICP to complete data acquisition is that the test sample must be provided in a solution state. In the actual use of ICP, sometimes only a sample solution of a highly corrosive solvent such as hydrofluoric acid can be provided. In this case, the commonly used quartz torch tube cannot be used to complete the sample measurement. If the three tube bodies forming the torch tube are all made of corrosion-resistant materials, the price of the torch tube will be expensive. Therefore, it is necessary to improve and design the related technology. Content of the Utility Model

[0004] In order to solve the above problems, the utility model provides a novel corrosion-resistant torch tube structure.

[0005] The above technical purpose of the utility model is achieved through the following technical solutions: A novel corrosion-resistant torch tube structure includes an outer tube and a middle tube coaxially arranged and fixed with the outer tube. A plasma gas inlet pipe is fixed and communicated on the outer tube. An auxiliary gas inlet pipe that penetrates the outer tube and is communicated with the middle tube is also fixed on the outer tube. One end of the middle tube is provided with an atomizer joint made of polytetrafluoroethylene and inserted and matched with the middle tube. A zirconia core tube is inserted on the side of the atomizer joint away from its feeding end.

[0006] By adopting the above technical solutions, the atomizer joint is made of polytetrafluoroethylene, and the core tube is made of zirconia material. Both the atomizer joint and the zirconia core tube are in contact with the atomized sample solution, and both have good corrosion resistance. The outer tube and the middle tube are not in contact with the corrosive sample solution, which is beneficial to extending the service life of the torch tube structure.

[0007] Further, the axis of the zirconia core tube and the axis of the atomizer joint both coincide with the axis of the outer tube.

[0008] By adopting the above technical solution, the design requirements of the ICP torch tube are that the sample, the cooling gas, and the auxiliary gas can smoothly pass through each pipeline, and ensure that they form a straight line on the axis of the torch tube, so as to effectively introduce the sample into the plasma for ionization. This design ensures that the sample can be evenly distributed in the plasma, thereby improving the accuracy and efficiency of analysis.

[0009] Further, two annular mounting grooves are provided on the outer wall of the atomizer joint, and O-rings are provided in both of the two annular mounting grooves, and the outer wall of the O-ring abuts against the inner wall of the outer tube near the end of the outer tube.

[0010] By adopting the above technical solution, the cooperation of the two O-rings ensures the connection sealing performance and coaxiality between the atomizer joint and the outer tube.

[0011] Further, the feed end of the atomizer joint adopts a spherical standard ground joint.

[0012] By adopting the above technical solution, the good sealing performance between the atomizer joint and the atomizer is ensured.

[0013] Further, the inner diameter of the main pipe section of the zirconia core tube is 4 mm, one end of the zirconia core tube away from the atomizer joint is in a hollow conical shape, and the inner diameter of the end of the zirconia core tube away from the atomizer joint is 1.3 mm.

[0014] The present application also discloses that the distance between one end of the zirconia core tube away from the atomizer joint and one end of the middle tube away from the atomizer joint is 2 mm, and the distance between one end of the outer tube away from the atomizer joint and one end of the middle tube away from the atomizer joint is 24.5 mm.

[0015] By adopting the above technical solution,

[0016] In summary, the present utility model has the following beneficial effects:

[0017] 1. In the present application, the atomizer joint is made of polytetrafluoroethylene, and the core tube is made of zirconia material. Both the atomizer joint and the zirconia core tube are in contact with the atomized sample solution, and both have good corrosion resistance. The outer tube and the middle tube are not in contact with the corrosive sample solution, which is beneficial to extending the service life of the torch tube structure;

[0018] 2. In the present application, the design requirements of the ICP torch tube are that the sample, the cooling gas, and the auxiliary gas can smoothly pass through each pipeline, and ensure that they form a straight line on the axis of the torch tube, so as to effectively introduce the sample into the plasma for ionization. This design ensures that the sample can be evenly distributed in the plasma, thereby improving the accuracy and efficiency of analysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the overall structural schematic diagram of the embodiment of the present utility model;

[0020] Figure 2 is Figure 1 the sectional view taken along the A-A side in

[0021] In the figure: 1. outer tube; 2. middle tube; 3. plasma gas inlet tube; 4. auxiliary gas inlet tube; 5. atomizer connector; 6. zirconia core tube; 7. annular installation groove; 8. O-ring. Specific implementation manner

[0022] 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 in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present application.

[0023] As Figure 1 and Figure 2 shown, the embodiment of the present application discloses a novel corrosion-resistant rectangular tube structure, including an outer tube 1 and a middle tube 2 coaxially arranged and fixed with the outer tube 1. A plasma gas inlet tube 3 (which can also be called a cooling gas inlet tube) is fixedly connected to the outer tube 1, and an auxiliary gas inlet tube 4 that penetrates the outer tube 1 and communicates with the middle tube 2 is also fixed on the outer tube 1. One end of the middle tube 2 is provided with an atomizer connector 5 that is inserted and matched with the middle tube 2 and is made of polytetrafluoroethylene. An zirconia core tube 6 is inserted on one side of the atomizer connector 5 away from its feed end.

[0024] The atomizer connector 5 is made of polytetrafluoroethylene, and the core tube is made of zirconia material. Both the atomizer connector 5 and the zirconia core tube 6 are in contact with the atomized sample solution, and both have good corrosion resistance. The outer tube 1 and the middle tube 2 are not in contact with the corrosive sample solution, which is beneficial to extending the service life of the rectangular tube structure.

[0025] The axis of the zirconia core tube 6 and the axis of the atomizer connector 5 both coincide with the axis of the outer tube 1. The design requirements of the ICP torch tube are that the sample, cooling gas, and auxiliary gas can smoothly pass through each pipeline and ensure that they form a straight line on the axis of the torch tube, so as to effectively introduce the sample into the plasma for ionization (the sample is introduced into the plasma torch flame in a certain form by the carrier gas and is fully evaporated, atomized, excited, and ionized in a high-temperature and inert atmosphere, emitting the characteristic spectral lines of the contained elements. This part belongs to the basic technology of ICP and does not need to be elaborated in detail here). This design ensures that the sample can be evenly distributed in the plasma, thereby improving the accuracy and efficiency of analysis.

[0026] The outer wall of the atomizer connector 5 is provided with two annular mounting grooves 7, and O-rings 8 are arranged in both of the two annular mounting grooves 7. The outer wall of the O-ring 8 abuts against the inner wall of the outer tube 1 near the end of the outer tube 1. The combined action of the two O-rings 8 ensures the connection sealing performance and coaxiality between the atomizer connector 5 and the outer tube 1.

[0027] In order to ensure the good sealing performance of the connection between the atomizer connector 5 and the atomizer (the connection between the atomizer connector 5 and the atomizer belongs to the prior art, for example, a quick-fixing clip can be used to fix between the atomizer connector 5 and the atomizer), the feed end of the atomizer connector 5 adopts a spherical standard ground joint.

[0028] In this embodiment, the inner diameter of the main pipe section of the zirconia core tube 6 is 4 mm. One end of the zirconia core tube 6 away from the atomizer connector 5 is in a hollow conical shape, the inner diameter of the end of the zirconia core tube 6 away from the atomizer connector 5 is 1.3 mm, the distance between the end of the zirconia core tube 6 away from the atomizer connector 5 and the end of the middle tube 2 away from the atomizer connector 5 is 2 mm, and the distance between the end of the outer tube 1 away from the atomizer connector 5 and the end of the middle tube 2 away from the atomizer connector 5 is 24.5 mm.

[0029] The working principle of a novel corrosion-resistant rectangular tube structure in this embodiment is as follows: The atomizer connector 5 is made of polytetrafluoroethylene, and the core tube is made of zirconia material. Both the atomizer connector 5 and the zirconia core tube 6 are in contact with the atomized sample solution, and both have good corrosion resistance. The outer tube 1 and the middle tube 2 are not in contact with the corrosive sample solution, which is beneficial to extending the service life of the rectangular tube structure.

[0030] The above is only the preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. Any technical solutions falling within the concept of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the present invention should also be regarded as within the protection scope of the present invention.

Claims

1. A novel corrosion-resistant rectangular pipe structure, characterized in that: It includes an outer tube (1) and a middle tube (2) which is coaxially arranged and fixed with the outer tube (1). A plasma gas inlet tube (3) is fixedly connected to the outer tube (1). An auxiliary gas inlet tube (4) which penetrates through the outer tube (1) and is connected to the middle tube (2) is also fixed on the outer tube (1). One end of the middle tube (2) is provided with an atomizer joint (5) which is inserted and matched with the middle tube (2) and made of polytetrafluoroethylene. A zirconia core tube (6) is inserted into one side of the atomizer joint (5) far away from its feed end.

2. The novel corrosion-resistant rectangular pipe structure according to claim 1, characterized in that: The axis of the zirconia core tube (6) and the axis of the atomizer joint (5) both coincide with the axis of the outer tube (1).

3. A novel corrosion-resistant rectangular tube structure according to claim 2, characterized in that: Two annular mounting grooves (7) are arranged on the outer wall of the atomizer joint (5). O-rings (8) are arranged in both of the two annular mounting grooves (7). The outer wall of the O-ring (8) is abutted against the position of the inner wall of the outer tube (1) close to the end of the outer tube (1).

4. A novel corrosion-resistant rectangular pipe structure according to claim 3, characterized in that: The feed end of the atomizer joint (5) adopts a spherical standard ground joint.

5. A novel corrosion-resistant rectangular pipe structure according to claim 4, characterized in that: The inner diameter of the main pipe section of the zirconia core tube (6) is 4 mm. One end of the zirconia core tube (6) far away from the atomizer joint (5) is in a hollow conical shape, and the inner diameter of the end of the zirconia core tube (6) far away from the atomizer joint (5) is 1.3 mm.

6. A novel anti-corrosion rectangular pipe structure according to claim 5, characterized in that: The distance between one end of the zirconia core tube (6) far away from the atomizer joint (5) and one end of the middle tube (2) far away from the atomizer joint (5) is 2 mm. The distance between one end of the outer tube (1) far away from the atomizer joint (5) and one end of the middle tube (2) far away from the atomizer joint (5) is 24.5 mm.

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