A dual-channel injection valve for an atomizer

Abstract

The present invention discloses a dual-channel sampling valve for an atomizer, which comprises a valve body. The valve body includes a stator plate and a rotor plate. The stator plate is provided with a first connection hole, a second connection hole, a third connection hole, a fourth connection hole, a fifth connection hole, a sixth connection hole, a seventh connection hole, and an eighth connection hole. The first connection hole, the second connection hole, the third connection hole, and the fourth connection hole form a first square. The fifth connection hole, the sixth connection hole, the seventh connection hole, and the eighth connection hole form a second square, and the side length of the second square is smaller than that of the first square. The stator plate is rotatably connected to the rotor plate. The rotor plate is provided with a first communication cavity, a second communication cavity, a third communication cavity, and a fourth communication cavity. The first communication cavity and the second communication cavity are respectively arranged corresponding to the upper side length and the lower side length of the first square, and the third communication cavity and the fourth communication cavity are respectively arranged corresponding to the left side length and the right side length of the second square.

Description

Technical Field

[0001] The present invention relates to the field of valve bodies, and particularly to a dual-channel sampling valve for an atomizer. Background Art

[0002] When using a mass spectrometer to analyze elements or isotopes, it is often necessary to correct the fractionation of the instrument. Therefore, it is necessary to frequently analyze calibration samples. Once the sample to be measured is switched, the atomizer must be cleaned before the next sample can be introduced, resulting in a long analysis process. Especially when using an automatic separation and enrichment device for online analysis of isotope ratios, the time consumption is long, and the isotope fractionation is extremely large from the start to the end of the analysis of a single element. During this process, calibration samples must be inserted frequently to correct the fractionation of the instrument, seriously reducing the test efficiency of the calibration samples. Summary of the Invention

[0003] The purpose of the present invention is to provide a dual-channel sampling valve for an atomizer with a simple structure and convenient use in view of the above problems.

[0004] To achieve the above purpose, the technical solution of the present invention is as follows:

[0005] A dual-channel sampling valve for an atomizer includes a valve body, the valve body includes a stator plate and a rotor plate, and the stator plate and the rotor plate are rotatably connected; the stator plate is provided with a first connection hole, a second connection hole, a third connection hole, a fourth connection hole, a fifth connection hole, a sixth connection hole, a seventh connection hole, and an eighth connection hole; the first connection hole, the second connection hole, the third connection hole, and the fourth connection hole form a first square, and the center point of the first square coincides with the center point of the stator plate; the fifth connection hole, the sixth connection hole, the seventh connection hole, and the eighth connection hole form a second square, the second square is correspondingly arranged relative to the first square, and the side length of the second square is smaller than the side length of the first square; the center point of the stator plate and the center point of the rotor plate are rotatably connected and a sealed state is maintained between the stator plate and the rotor plate. The rotor plate is provided with a first communication cavity, a second communication cavity, a third communication cavity, and a fourth communication cavity. The first communication cavity and the second communication cavity are symmetrically arranged, and the first communication cavity and the second communication cavity are respectively correspondingly arranged with the upper side length and the lower side length of the first square. The third communication cavity and the fourth communication cavity are symmetrically arranged, and the third communication cavity and the fourth communication cavity are respectively correspondingly arranged with the left side length and the right side length of the second square.

[0006] Further, the first connection hole is communicated with the atomizer, the second connection hole and the fifth connection hole are communicated through a first sampling ring, the third connection hole is communicated with a peristaltic pump for suction operation, the fourth connection hole and the eighth connection hole are communicated through a second sampling ring, the sixth connection hole is communicated with a sampler for inputting samples or cleaning liquid, and the seventh connection hole is communicated with a plunger pump for inputting cleaning liquid.

[0007] Furthermore, the first communication cavity, the second communication cavity, the third communication cavity, and the fourth communication cavity are all arranged in an arc shape. The bending radian of the first communication cavity and the second communication cavity is consistent with the circumscribed arc radian of the first square, and the bending radian of the third communication cavity and the fourth communication cavity is consistent with the circumscribed arc radian of the second square.

[0008] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0009] Through the design of the cooperation between the connection holes on the stator plate and the communication cavities on the rotor plate, the present invention forms two different sample injection routes on the valve body. When the sample in one sample injection loop is being analyzed, the sample in the other sample injection loop can be simultaneously cleaned and filled, so as to achieve the effect of uninterrupted analysis and testing of the two sample injection loops, effectively improving the analysis and testing efficiency of the sample to be tested; and when using the automatic separation and enrichment device for on-line analysis of isotope ratios, the automatic separation and enrichment process of elements can be continuous, which brings convenience to the analysis and testing work of the sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0011] Figure 1 It is a schematic diagram of the first state of the present invention;

[0012] Figure 2 It is a schematic diagram of the second state of the present invention;

[0013] Figure 3 It is a schematic diagram of the structure of the stator plate;

[0014] Figure 4 It is a schematic diagram of the structure of the rotor plate. DETAILED DESCRIPTION OF THE INVENTION

[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts, any modifications, equivalent replacements, improvements, etc., shall be included in the protection scope of the present invention.

[0016] Such as Figures 1 to 4As shown in the figure, this embodiment discloses a dual-channel injection valve for an atomizer, including a valve body. The valve body includes a stator plate 9 and a rotor plate 10, and the stator plate 9 is rotatably connected to the rotor plate 10. The stator plate 9 is provided with a first connection hole 1, a second connection hole 2, a third connection hole 3, a fourth connection hole 4, a fifth connection hole 5, a sixth connection hole 6, a seventh connection hole 7, and an eighth connection hole 8. The first connection hole 1, the second connection hole 2, the third connection hole 3, and the fourth connection hole 4 form a first square, and the center point of the first square coincides with the center point of the stator plate 9. The fifth connection hole 5, the sixth connection hole 6, the seventh connection hole 7, and the eighth connection hole 8 form a second square. The second square is correspondingly arranged relative to the first square, and the side length of the second square is smaller than the side length of the first square.

[0017] The first connection hole 1 is communicated with the atomizer to atomize the sample into an aerosol. The second connection hole 2 is communicated with the fifth connection hole 5 through a first injection loop A. The third connection hole 3 is communicated with a peristaltic pump for suction operation. The fourth connection hole 4 is communicated with the eighth connection hole 8 through a second injection loop B. The sixth connection hole 6 is communicated with an injector for inputting a sample or a cleaning solution. The seventh connection hole 7 is communicated with a plunger pump for inputting a cleaning solution.

[0018] The center point of the stator plate 9 is rotatably connected to the center point of the rotor plate 10, and a sealed state is maintained between the stator plate 9 and the rotor plate 10. The rotor plate 10 is provided with a first communication cavity 11, a second communication cavity 12, a third communication cavity 13, and a fourth communication cavity 14. The first communication cavity 11 and the second communication cavity 12 are symmetrically arranged, and the first communication cavity 11 and the second communication cavity 12 are respectively correspondingly arranged with the upper side length and the lower side length of the first square. The third communication cavity 13 and the fourth communication cavity 14 are symmetrically arranged, and the third communication cavity 13 and the fourth communication cavity 14 are respectively correspondingly arranged with the left side length and the right side length of the second square.

[0019] When the rotor plate rotates, it is mainly divided into two working states. In the first working state, the sample in the second injection loop B is sucked out and cleaned, and the sample in the first injection loop A is loaded, such as Figure 1As shown in the figure, when working, the cleaning liquid is introduced from the sixth connection port 6, passes through the fourth communication cavity 14 and the eighth connection port 8, then reaches the second sample loop B, and then enters the third connection port 3 after passing through the fourth connection port 4 and the second communication cavity 12, and finally the waste liquid is discharged. After the second sample loop B is cleaned, the sample to be tested is introduced from the sixth connection port 6, passes through the fourth communication cavity 14 and the eighth connection port 8, then reaches the second sample loop B, and then enters the third connection port 3 after passing through the fourth connection port 4 and the second communication cavity 12. At this time, the second sample loop B is already filled with the sample solution to be tested. At the same time, the cleaning liquid is introduced from the seventh connection port 7, passes through the third communication cavity and the fifth connection port 5, and then pushes the sample solution pre-stored in the first sample loop A to the second connection port 2, and then enters the nebulizer through the first communication cavity 11 and the first connection port 1 for sample analysis operation.

[0020] In the second working state, the rotor plate rotates clockwise by ninety degrees, and it can perform suction cleaning operation on the sample in the first sample loop A and sample loading operation on the sample in the second sample loop B. As Figure 2 As shown in the figure, when working, the cleaning liquid is introduced from the sixth connection port 6, passes through the third communication cavity 13 and the fifth connection port 5, then reaches the first sample loop A, and then enters the third connection port 3 after passing through the second connection port 2 and the second communication cavity 12, and finally the waste liquid is discharged. After the first sample loop A is cleaned, the sample to be tested is introduced from the sixth connection port 6, passes through the third communication cavity 13 and the fifth connection port 5, then reaches the first sample loop A, and then enters the third connection port 3 after passing through the second connection port 2 and the second communication cavity 12. At this time, the first sample loop A is already filled with the sample solution to be tested. At the same time, the cleaning liquid is introduced from the seventh connection port 7, passes through the fourth communication cavity 14 and the eighth connection port 8, and then pushes the sample solution pre-stored in the second sample loop B to the fourth connection port 4, and then enters the nebulizer through the first communication cavity 11 and the first connection port 1 for sample analysis operation.

[0021] By rotating the rotor plate of the present invention, the mutual connection state between the connection holes and the flow cavities is changed, and the rapid switching injection of the samples in the first sample loop A and the second sample loop B can be realized, reducing the time for extracting the sample solution into the nebulizer and the cleaning time after the sample test is completed, effectively improving the test efficiency, accurately controlling the injection volume, and maintaining the injection speed stable, so as to realize the high-efficiency and accurate analysis of the sample.

Claims

1. A dual-channel sampling valve for an atomizer, comprising a valve body, characterized in that: the valve body includes a stator plate and a rotor plate, and the stator plate is rotatably connected to the rotor plate; the stator plate is provided with a first connection hole, a second connection hole, a third connection hole, a fourth connection hole, a fifth connection hole, a sixth connection hole, a seventh connection hole, and an eighth connection hole; the first connection hole, the second connection hole, the third connection hole, and the fourth connection hole form a first square, and the center point of the first square coincides with the center point of the stator plate; the fifth connection hole, the sixth connection hole, the seventh connection hole, and the eighth connection hole form a second square, the second square is correspondingly arranged relative to the first square, and the side length of the second square is smaller than the side length of the first square; the center point of the stator plate is rotatably connected to the center point of the rotor plate, and a sealed state is maintained between the stator plate and the rotor plate. The rotor plate is provided with a first communication cavity, a second communication cavity, a third communication cavity, and a fourth communication cavity. The first communication cavity and the second communication cavity are symmetrically arranged, and the first communication cavity and the second communication cavity are respectively correspondingly arranged with the upper side length and the lower side length of the first square. The third communication cavity and the fourth communication cavity are symmetrically arranged, and the third communication cavity and the fourth communication cavity are respectively correspondingly arranged with the left side length and the right side length of the second square; the first connection hole is communicated with the atomizer, the second connection hole is communicated with the fifth connection hole through a first sampling ring, the third connection hole is communicated with a peristaltic pump for suction operation, the fourth connection hole is communicated with the eighth connection hole through a second sampling ring, the sixth connection hole is communicated with a sampler for inputting samples or cleaning liquid, and the seventh connection hole is communicated with a plunger pump for inputting cleaning liquid; the first communication cavity, the second communication cavity, the third communication cavity, and the fourth communication cavity are all arranged in an arc shape.

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