Gas circuit assembly of flame atomic absorption spectrometer

Abstract

The utility model relates to a gas circuit assembly of a flame atomic absorption spectrometer, which comprises a gas circuit box body, an acetylene inlet joint, an air inlet joint, an acetylene outlet joint and an air outlet joint are arranged on the gas circuit box body, the acetylene inlet joint is connected with the acetylene outlet joint through an acetylene pipeline, and the air inlet joint is connected with the acetylene outlet joint through an air pipeline. The air inlet connector and the air outlet connector are connected through an air pipeline, an acetylene pressure switch is arranged on the acetylene pipeline, and an air pressure switch is arranged on the air pipeline. The gas inlet and the gas outlet of acetylene and air are integrated on one gas circuit box body, so that the whole gas circuit box body can be replaced, the replacement is simple, convenient and rapid, and the safety is also greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of analytical instruments, and particularly relates to a gas path assembly of a flame atomic absorption spectrometer. Background Technique

[0002] A flame atomic absorption spectrometer is a common chemical analytical instrument that can measure the content of various elements in a sample. Its principle is to utilize the characteristic that the atoms of the elements to be measured in the sample absorb spectral lines during flame combustion, and calculate the concentration of the corresponding elements in the sample by measuring the intensity of the absorbed spectral lines.

[0003] For the normal ignition of the spectrometer flame, precise proportioning of acetylene and air is required. However, the current gas path system design of the flame atomic absorption spectrometer is cumbersome, not easy to replace the equipment, and prone to air leakage. Content of the Utility Model

[0004] The purpose of the utility model is to provide a gas path assembly of a flame atomic absorption spectrometer to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A gas path assembly of a flame atomic absorption spectrometer includes a gas path box body. An acetylene inlet joint, an air inlet joint, an acetylene outlet joint, and an air outlet joint are provided on the gas path box body. The acetylene inlet joint and the acetylene outlet joint are connected through an acetylene pipeline, the air inlet joint and the air outlet joint are connected through an air pipeline, an acetylene pressure switch is provided on the acetylene pipeline, and an air pressure switch is provided on the air pipeline.

[0007] In a possible implementation manner, the gas path box body includes a cover plate and a base. The acetylene pressure switch or the air pressure switch is provided on the cover plate, and the acetylene inlet joint or the air inlet joint is provided on the front side wall of the base.

[0008] Optionally, the cover plate is fixed on the base through fastening screws.

[0009] In a possible implementation manner, the air outlet joint is provided on the rear side wall of the base, and the acetylene outlet joint is provided on the left side wall of the base.

[0010] In a possible implementation manner, a three-way solenoid valve is provided between the acetylene pressure switch and the acetylene outlet joint, and one interface of the three-way solenoid valve is connected to the acetylene pipeline.

[0011] Optionally, the air inlet joint is externally connected to an air compressor, and the acetylene inlet joint is externally connected to an acetylene cylinder.

[0012] In a possible implementation, the distance from the air pressure switch to the air intake joint is greater than the distance from the acetylene pressure switch to the acetylene intake joint.

[0013] Compared with the prior art, the present utility model has the following advantages:

[0014] By integrating the intake and outlet pipelines of acetylene and air onto a gas path box body, overall replacement can be carried out, which is simple, fast, and the safety is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a top view of the structure of the gas path assembly of the flame atomic absorption spectrometer of the present utility model;

[0016] Figure 2 It is a structural diagram of the gas path assembly of the flame atomic absorption spectrometer of the present utility model.

[0017] In the figure: 1. Cover plate, 2. Acetylene intake joint, 3. Air intake joint, 4. Acetylene pressure switch, 5. Air pressure switch, 6. Three-way solenoid valve, 7. Fastening screw, 8. Air outlet joint, 9. Acetylene outlet joint, 10. Acetylene pipeline, 11. Air pipeline, 12. Base, 100. Gas path box body. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] To further elaborate on the technical means and effects adopted by the present utility model to achieve the predetermined utility model purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation manners, structures, features, and effects according to the present utility model as follows.

[0019] As Figure 1-2 shown, a gas path assembly of a flame atomic absorption spectrometer includes a gas path box body 100. The gas path box body 100 is provided with an acetylene intake joint 2, an air intake joint 3, an acetylene outlet joint 9, and an air outlet joint 8. The acetylene intake joint 2 and the acetylene outlet joint 9 are connected by an acetylene pipeline 10, and the air intake joint 3 and the air outlet joint 8 are connected by an air pipeline 11. An acetylene pressure switch 4 is provided on the acetylene pipeline 10, and an air pressure switch 5 is provided on the air pipeline 11. The gas path box body 100 includes a cover plate 1 and a base 12. The acetylene pressure switch 4 or the air pressure switch 5 is provided on the cover plate 1, and the acetylene intake joint 2 or the air intake joint 3 is provided on the front side wall of the base 12.

[0020] Among them, in the present utility model, two gas pipelines for acetylene and air are integrated on the gas path box body 100, facilitating the control of the flow rates of acetylene and air. The air pipeline 11 and the acetylene pipeline 10 can adopt rubber hoses, etc. When the pressure switch is turned on, acetylene or air can flow in the pipeline and then enter the air outlet joint 8 or the acetylene outlet joint 9, and then the air outlet joint 8 or the acetylene outlet joint 9 is connected to the atomizer through an external pipeline to transport air and acetylene into the atomizer for mixing. When the pressure switch is turned off, the gas in the pipeline cannot continue to flow forward, but will stay in the air pipeline 11 between the air inlet joint 3 and the air pressure switch 5, or stay in the acetylene pipeline 10 between the acetylene inlet joint 2 and the acetylene pressure switch 4.

[0021] Optionally, the cover plate 1 is fixed on the base 12 by fastening screws 7. There are four screws, respectively located near the four corners of the cover plate 1. Insert the screws into the screw holes on the cover plate 1, and then tighten the screws to complete the assembly of the cover plate 1 and the base 12, forming the gas path box body 100.

[0022] In order to make better use of the space of the gas path box body 100, the air outlet joint 8 is arranged on the rear side wall of the base 12, and the acetylene outlet joint 9 is arranged on the left side wall of the base 12. A three-way solenoid valve 6 is arranged between the acetylene pressure switch 4 and the acetylene outlet joint 9, and one interface of the three-way solenoid valve 6 is connected to the acetylene pipeline 10. The distance from the air pressure switch 5 to the air inlet joint 3 is greater than the distance from the acetylene pressure switch 4 to the acetylene inlet joint 2.

[0023] Among them, in the present utility model, the three-way solenoid valve 6 adopted is a direct-acting solenoid valve. The other two interfaces of the three-way solenoid valve 6 can be connected to a flow controller to monitor the flow rate of acetylene gas. The air pressure switch 5 and the acetylene pressure switch 4 are not arranged on the same horizontal line because the acetylene pipeline 10 has bends. In order to enable the three-way solenoid valve 6 to better monitor the flow rate of acetylene gas, the acetylene pressure switch 4 should be kept at a certain distance from the three-way solenoid valve 6 as much as possible. For the air pressure switch 5, it is arranged at the middle position of the entire air gas path, which can better control the air flow.

[0024] In the present utility model, the air gas source can come from an air compressor, and the acetylene gas source can come from an acetylene cylinder. The air inlet joint 3 is externally connected to an air compressor, and the acetylene inlet joint 2 is externally connected to an acetylene cylinder.

[0025] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "center", "both ends", "left and right", "front and back", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0026] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "setting", "connection", "fixation", "swivel connection", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] The above are only the preferred embodiments of the present utility model and do not impose any formal limitations on the present utility model. Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the disclosed technical content within the scope of the technical solution of the present utility model. However, as long as it does not depart from the content of the technical solution of the present utility model, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A gas path component of a flame atomic absorption spectrometer, characterized in that: The invention comprises an air circuit box (100), wherein the air circuit box (100) is provided with an acetylene air inlet joint (2), an air air inlet joint (3), an acetylene air outlet joint (9) and an air air outlet joint (8); the acetylene air inlet joint (2) and the acetylene air outlet joint (9) are connected via an acetylene pipeline (10); the air air inlet joint (3) and the air air outlet joint (8) are connected via an air pipeline (11); an acetylene pressure switch (4) is provided on the acetylene pipeline (10); and an air pressure switch (5) is provided on the air pipeline (11).

2. The gas path component of the flame atomic absorption spectrometer according to claim 1, characterized in that: The gas circuit box (100) comprises a cover plate (1) and a base (12); the acetylene pressure switch (4) or the air pressure switch (5) is arranged on the cover plate (1); and the acetylene air inlet connector (2) or the air air inlet connector (3) is arranged on the front side wall of the base (12).

3. The gas path component of the flame atomic absorption spectrometer according to claim 2, characterized in that: The cover plate (1) is fixed to the base (12) by means of fastening screws (7).

4. The gas path component of the flame atomic absorption spectrometer according to claim 2, characterized in that: The air outlet connector (8) is arranged on the rear side wall of the base (12), and the acetylene outlet connector (9) is arranged on the left side wall of the base (12).

5. The gas path component of the flame atomic absorption spectrometer according to claim 1, characterized in that: A three-way solenoid valve (6) is provided between the acetylene pressure switch (4) and the acetylene outlet connector (9), and one interface of the three-way solenoid valve (6) is connected to the acetylene pipeline (10).

6. The gas path component of the flame atomic absorption spectrometer according to claim 1, characterized in that: The air intake connector (3) is externally connected to an air compressor, and the acetylene intake connector (2) is externally connected to an acetylene cylinder.

7. The gas path assembly of the flame atomic absorption spectrometer according to claim 1, characterized in that: The distance between the air pressure switch (5) and the air intake connector (3) is greater than the distance between the acetylene pressure switch (4) and the acetylene intake connector (2).

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