Gas path homogenizing baffle

Abstract

The utility model discloses a gas path homogenizing baffle which comprises a top surface, a bottom surface, a second side surface and a first side surface, a second groove is formed in the second side face, and the width of an upper end opening of the second groove is larger than that of a lower end opening of the second groove. A first groove is formed in the first side face and is trapezoidal, the width of the upper end of the first groove is smaller than that of an opening in the lower end of the first groove, the upper end of the first groove faces the top face, and the opening in the lower end of the first groove faces and extends to the bottom face; the bottom face is provided with an air channel, and the lower end opening of the second groove is in air channel communication with the lower end opening of the first groove through the air channel. Due to the design of the second groove and the first groove, gas is decelerated twice when flowing, the gas is buffered and homogenized twice, and even a flange can be arranged before the gas enters the gas channel, so that the gas is decelerated again.

Description

Technical Field

[0001] The utility model belongs to the technical field of laser ablation, and in particular relates to a gas path homogenizing baffle. Background Art

[0002] Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) is a solid direct sampling, in-situ, micro-area, elemental analysis technology. With the gradual maturity of laser ablation systems, LA-ICP-MS has been widely used in geology, environment, archaeology, materials and other fields. Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) uses a laser to emit a laser beam, uses an objective lens to focus the laser on a specific area of ​​the sample, and uses the energy of the pulsed laser to directly ablate the solid sample into tiny particles, forming an aerosol with the carrier gas, and then the particles are plasmatized by an inductively coupled plasma source (ICP) and enter the mass spectrometer for element detection.

[0003] In our daily gas supply, the sample chamber is basically supplied with gas through pipelines. Since the cross-section of the sample chamber is much larger than the cross-section of the pipeline, if the gas is not homogenized, on the one hand, the gas flow rate will be too high, resulting in turbulent air flow inside the sample chamber. On the other hand, the air flow distribution on the vertical cross-section of the sample chamber in the air inlet direction is uneven. In some places, the gas flow rate is very high, while in some places, the flow rate is very low. When analyzing the sample, on the one hand, there will be a serious position effect, and on the other hand, it will cause large fluctuations in the analysis signal, resulting in larger errors in the analysis results. Utility Model Content

[0004] In view of this, the purpose of the present invention is to provide a gas path homogenizing baffle to solve the problems raised in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides a gas path homogenizing baffle, comprising a top surface, a bottom surface, an opposite second side surface and a first side surface;

[0006] A second groove is formed on the second side surface, the second groove is in an inverted trapezoidal shape, the width of the upper opening of the second groove is greater than the width of the lower opening thereof, the upper opening of the second groove faces and extends to the top surface, and the lower opening of the second groove faces and extends to the bottom surface;

[0007] A first groove is formed on the first side surface, the first groove is trapezoidal, the width of the upper end of the first groove is smaller than the width of the lower end opening thereof, the upper end of the first groove faces the top surface, and the lower end opening of the first groove faces and extends to the bottom surface;

[0008] The bottom surface is provided with an air path passage, and the lower end opening of the second groove is in air communication with the lower end opening of the first groove through the air path passage.

[0009] Preferably, the first groove further comprises a flange, and the flange is arranged above the air path passage, and the flange is close to the lower end opening of the first groove.

[0010] Preferably, left and right ends of the first side surface are designed in an arc shape.

[0011] The beneficial effects of the utility model are:

[0012] 1) The design of the first groove and the second groove of the utility model decelerates the gas twice when it flows, and has a double homogenization effect on the gas. A flange can even be provided before the gas enters the gas path to decelerate the gas once more.

[0013] 2) The utility model invention changes the original tube air intake mode to a line air intake mode, ensuring that the gas flow rate and flow direction are consistent at each position on the same vertical cross section in the air intake direction. The gas can flow smoothly toward the sample, reducing the position effect during sample analysis and improving the stability of the analysis signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 This is a first side view schematic diagram of a gas path homogenizing baffle disclosed in the utility model;

[0016] Figure 2 This is a second side view schematic diagram of a gas path homogenizing baffle disclosed in the utility model;

[0017] Figure 3 The utility model is a bottom schematic diagram of a gas path homogenizing baffle disclosed in the utility model. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] like Figures 1 to 3As shown, a gas path homogenizing baffle disclosed in the present embodiment includes a top surface 40, a bottom surface 30, an opposite second side surface 10 and a first side surface 20; a second groove 11 is provided on the second side surface 10, and the second groove 11 is in an inverted trapezoidal shape. The width of the upper end opening of the second groove 11 is greater than the width of the lower end opening thereof, the upper end opening of the second groove 11 faces and extends to the top surface 40, and the lower end opening of the second groove 11 faces and extends to the bottom surface 30; a first groove 21 is provided on the first side surface 20, and the first groove 21 is trapezoidal. The width of the upper end of the first groove 21 is less than the width of the lower end opening thereof, the upper end of the first groove 21 faces the top surface 40, the upper end of the first groove 21 is closed, and the lower end opening of the first groove 21 faces the bottom surface 30; an air path channel 31 is provided on the bottom surface 30, and the lower end opening of the second groove 11 is air-connected with the lower end opening of the first groove 21 through the air path channel 31.

[0020] In actual application scenarios, the gas first enters from the upper end of the first groove 21, passes through the first groove 21 and enters the gas path 31 from its lower end opening; because the upper end of the first groove 21 is blocked, the gas can only flow out to the lower end opening of the first groove 21, and the first groove 21 is trapezoidal in design, with the upper end narrower than the lower end opening, so when the gas flows to the lower part of the first groove 21, the gas flow rate will slow down, achieving the first gas homogenization effect. Then, the gas passes through the gas path 31 and bypasses the bottom surface 30, enters the second groove 11 from the lower end opening of the second groove 11, passes through the second groove 11 and enters the subsequent device from its upper end opening; the upper end opening of the second groove 11 extends to the top surface 40, and the gas can enter the subsequent device from the top surface 40; the second groove 11 is designed to be an inverted trapezoid, and the lower end opening of the second groove 11 is narrower than the upper end opening, so when the gas flows to the upper part of the second groove 11, the gas flow rate will slow down, which has a second gas homogenization effect, and finally the gas enters the sample chamber through the gap between the baffle and the sample chamber cover in a surface air intake mode.

[0021] In some other embodiments, such as Figure 1 As shown, the first groove 21 also includes a flange 23, which is arranged above the gas path channel 31. The flange 23 is close to the lower end opening of the first groove 21. The flange reduces the space for gas to enter the gas path channel 31, further reducing the gas flow rate and achieving a gas homogenization effect.

[0022] In some other embodiments, the left and right ends of the first side surface 20 adopt an arc-shaped design 22 to facilitate machining of the bottom of the sample chamber. At the same time, because the baffle is directional, it is convenient for installers to quickly and accurately install the baffle.

[0023] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0024] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A gas path homogenizing baffle, characterized in that: comprising a top surface, a bottom surface, and opposite first and second side surfaces; A second groove is formed on the second side surface, the second groove is in an inverted trapezoidal shape, the width of the upper opening of the second groove is greater than the width of the lower opening thereof, the upper opening of the second groove faces and extends to the top surface, and the lower opening of the second groove faces and extends to the bottom surface; A first groove is formed on the first side surface, the first groove is trapezoidal, the width of the upper end of the first groove is smaller than the width of the lower end opening thereof, the upper end of the first groove faces the top surface, and the lower end opening of the first groove faces and extends to the bottom surface; The bottom surface is provided with an air path passage, and the lower end opening of the second groove is in air communication with the lower end opening of the first groove through the air path passage.

2. The gas path homogenizing baffle according to claim 1, characterized in that: The first groove further comprises a flange, which is arranged above the air passage and close to the lower end opening of the first groove.

3. The gas path homogenizing baffle according to claim 1, characterized in that: The left and right ends of the first side surface are designed in an arc shape.

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