Closed ICP-AES light path connecting device

Abstract

The application relates to a closed ICP-AES light path connecting device, which comprises a connecting flange, a light path receiving assembly and an adjusting assembly. The connecting flange is located at an optical transmission position. The light path receiving assembly is used for receiving an optical signal. The connecting flange is connected with the light path receiving assembly. The adjusting assembly is arranged on the connecting flange, is located on a plane perpendicular to an axis of the light path receiving assembly, and is located at a periphery of the light path receiving assembly to top-press the light path receiving assembly and adjust an axial position of the light path receiving assembly. The closed ICP-AES light path connecting device can effectively ensure ICP-AES instrument light room, convex mirror and sample flame core collimation, improves equipment installation precision, ensures instrument test performance, and reduces workload and cost during test device design, experiment and existing instrument modification.

Description

Technical Field

[0001] This invention belongs to the field of radioactive sample analysis, specifically relating to a closed ICP-AES optical path connection device. Background Technology

[0002] Post-processing analysis technology is the "eye" of the post-processing process, crucial for ensuring its safe and stable operation. In the Purex process for uranium-based post-processing, inductively coupled plasma atomic emission spectrometry (ICP-AES) is used to analyze the elemental composition of radioactive samples. With the increasing clarity of post-processing analysis requirements and the development of equipment, enclosed ICP-AES devices have emerged, where the sample introduction system, part of the excitation source (including induction coils, torch tubes, and part of the gas path), and part of the optical path are enclosed in a glove box, while other components are externally mounted. Examples include... Figure 1 As shown, the design focus of the optical path connection device of this equipment is the sealing performance of the internal and external optical transmission components and the optical signal transmission capability, the latter of which will determine the detection performance of the equipment.

[0003] Currently, due to considerations regarding the stability of post-processing analysis equipment, almost all enclosed ICP-AES systems employ non-adjustable optical path connection devices to achieve sample light transmission between the inside and outside of the chamber. Although this method offers good sealing performance and is safe and reliable, the different manufacturing methods of the glove box and connection device make it difficult to achieve the same manufacturing precision, inevitably resulting in manufacturing errors. Furthermore, during the process of connecting both devices to the ICP-AES instrument, the presence of welding thermal stress, installation stress, etc., may cause a shift between the optical path center and the sample flame core, thereby reducing the sample light intensity received by the analyzer's optical chamber and increasing the detection limit.

[0004] Therefore, a connecting device that can achieve multi-directional adjustment within a certain range is needed to compensate for the processing errors between the glove box, the connecting device, and the optical chamber of the analytical instrument, so as to ensure that the optical chamber, the convex mirror, and the sample flame core of the ICP-AES instrument are collimated, and to ensure that the optical chamber receives a sample light signal of sufficient intensity during the analysis process. Summary of the Invention

[0005] To address the shortcomings of existing designs, the purpose of this invention is to provide a closed ICP-AES optical path connection device to compensate for processing errors between the glove box, the connection device, and the optical chamber of the analytical instrument.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: a closed ICP-AES optical path connection device, including a connecting flange, an optical path receiving component, and an adjustment component. The connecting flange is located at the optical transmission point, the optical path receiving component is used to receive optical signals, the connecting flange is connected to the optical path receiving component, and the adjustment component is disposed on the connecting flange, located on a plane perpendicular to the axis of the optical path receiving component, and located around the optical path receiving component to press against the optical path receiving component and adjust the axial position of the optical path receiving component.

[0007] Furthermore, the number of adjustment components is three, and all three adjustment components are disposed on the connecting flange to press the optical path receiving component from the first direction and the second direction, wherein the first direction and the second direction are perpendicular to each other.

[0008] Furthermore, the adjustment assembly includes a base and an adjustment bolt. The base is connected to the connecting flange and is located around the optical path receiving assembly. The adjustment bolt is threadedly connected to the base and is perpendicular to the axis of the optical path receiving assembly. The optical path receiving assembly is pressed against it through the threaded transmission between the adjustment bolt and the base.

[0009] Furthermore, the optical path receiving assembly includes a condenser, an optical path receiver, a convex lens, a rear cover plate, a flange connector, and a convex lens retaining ring. The optical path receiver is hollow inside, with one end connected to the condenser and the other end away from the condenser connected to the flange connector. The flange connector has a through-hole that communicates with the optical path receiver, and an internal thread is provided on the inner wall of the end away from the optical path receiver. The convex lens retaining ring is disposed in the through-hole, between the internal thread and the optical path receiver, and the convex lens is disposed in the convex lens retaining ring. The rear cover plate is located in the through-hole at the end away from the convex lens and is threaded into the through-hole. It has a through hole that communicates with the through-hole and abuts against the convex lens retaining ring.

[0010] Furthermore, a sealing gasket is provided between the convex mirror fixing ring and the convex mirror.

[0011] Furthermore, the optical path receiver is also provided with a flat mirror groove, located at one end of the optical path receiver near the flange connector, and a flat mirror can be optionally installed therein.

[0012] Furthermore, a back cover for the flat mirror is provided between the flat mirror and the convex mirror.

[0013] Furthermore, a convex lens front cover is provided between the convex lens and the optical path receiver, and a sealing gasket is provided between the convex lens front cover and the convex lens.

[0014] Furthermore, the optical path receiver is equipped with a gas quick-connect interface.

[0015] Furthermore, the optical path receiver is threadedly connected to the concentrator, and the gas quick-connect interface is located at one end of the optical path receiver near the flange connector.

[0016] The advantages of this invention are: it can effectively ensure the collimation of the optical chamber, convex lens, and sample flame core of the ICP-AES instrument during the development of closed ICP-AES equipment and the closed modification of laboratory ICP-AES equipment, thereby improving the installation accuracy of the equipment, ensuring the testing performance of the instrument, and reducing the workload and cost of experimental device design, experimentation, and modification of existing instruments; when combined with a split optical path receiving component, it further enhances the versatility and maintainability of this design in different types of equipment, indirectly extending the service life of the equipment and improving its economic efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a closed-type ICP-AES device.

[0018] Figure 2 This is a schematic diagram of the structure of a closed ICP-AES optical path connection device according to the present invention;

[0019] Figure 3 for Figure 2 A schematic diagram of the structure of the optical path receiving component;

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Connecting flange; 2. Optical path receiving assembly; 3. Adjustment assembly; 21. Condenser; 22. Optical path receiver; 23. Convex lens; 24. Rear cover plate; 25. Flange connector; 26. Convex lens retaining ring; 231. Convex lens front cover; 251. Light passage hole; 253. Flat lens; Flat lens rear cover; 254. Detailed Implementation

[0022] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0023] like Figure 2-3As shown, the present invention provides a closed ICP-AES optical path connection device, including a connecting flange 1, an optical path receiving component 2, and an adjustment component 3. The optical path receiving component 2 is used to receive the light signal emitted after the sample is plasma-ionized. The connecting flange 1 is connected to the optical path receiving component 2. The adjustment component 3 is disposed on the connecting flange 1, located on a plane perpendicular to the axis of the optical path receiving component 2, and located around the optical path receiving component 2, so as to press against the optical path receiving component 2 and adjust the axial position of the optical path receiving component 2, thereby keeping the optical chamber of the ICP-AES instrument, the optical path receiving component 2, and the sample flame core collimated when there are processing errors in the closed ICP-AES equipment.

[0024] It is understood that the connecting flange 1 is connected to the optical transmission point of the enclosed ICP-AES, and the reception and transmission of sample optical signals are realized by connecting the optical path receiving component 2 to the connecting flange 1. In this embodiment, the connecting flange 1 is welded to the glove box.

[0025] It is understood that the connection method between the connecting flange 1 and the optical path receiving component 2 can be any method, such as bolt connection or plug connection. As long as the relative position of the optical path receiving component 2 and the connecting flange 1 are finely adjusted by adjusting component 3 after the connection is established, the axial position of the optical path receiving component 2 can be adjusted. In this embodiment, the connecting flange 1 and the optical path receiving component 2 are connected by bolts. After the connection is established, the axial position of the optical path receiving component 2 is finely adjusted by pressing the periphery of the optical path receiving component 2 with adjusting component 3.

[0026] Furthermore, a sealing ring is provided between the optical path receiving component 2 and the connecting flange 1 to ensure that the overall airtightness of the closed analysis equipment is not affected even after the optical path receiving component 2 is finely adjusted after the radioactive sample test.

[0027] Furthermore, there are three adjustment components 3, all of which are mounted on the connecting flange 1 to press the optical path receiving component 2 from the first direction and the second direction, wherein the first direction and the second direction are perpendicular to each other.

[0028] In this embodiment, the connection between the optical path receiving component 2 and the connecting flange 1 is circular. Three adjusting components 3 are located around three of the four quadrants of this circle, respectively, to press against the optical path receiving component 2 from two mutually perpendicular directions, achieving a fine-tuning effect. In other embodiments, the connection between the optical path receiving component 2 and the connecting flange 1 can be of any shape, as long as the three adjusting components 3 can press against the optical path receiving component 2 from both the first and second directions, and the first and second directions are perpendicular.

[0029] It is understandable that the number of adjustment components 3 can be one, two or more, as long as the optical path receiving component 2 can be pressed down by the adjustment components 3, thereby fine-tuning the position of the axis of the optical path receiving component 2.

[0030] Furthermore, the adjustment assembly 3 includes a base and an adjustment bolt. The base is connected to the connecting flange 1 and is located around the optical path receiving assembly 2. The adjustment bolt is threadedly connected to the base and is perpendicular to the axis of the optical path receiving assembly 2. The optical path receiving assembly 2 is pressed against the base through the threaded transmission between the adjustment bolt and the base.

[0031] It is understandable that the adjustment component 3 can also be any structure such as a cylinder or push rod, as long as it is set on the connecting flange 1 and can press against the optical path receiving component 2 to adjust the axial position of the optical path receiving component 2.

[0032] It is understandable that the maximum adjustment distance of the adjusting bolt in one direction is 3mm.

[0033] Furthermore, the optical path receiving assembly 2 includes a condenser 21, an optical path receiver 22, a convex lens 23, a rear cover plate 24, a flange connector 25, and a convex lens retaining ring 26. The optical path receiver 22 is hollow inside, with one end connected to the condenser 21 and the other end away from the condenser 21 connected to the flange connector 25. The flange connector 25 has a through-hole 251 that communicates with the optical path receiver 22, and an internal thread is provided on the inner wall of the end away from the optical path receiver 22. The convex lens retaining ring 26 is disposed in the through-hole 251, between the internal thread and the optical path receiver 22, and the convex lens 23 is disposed in the convex lens retaining ring 26. The rear cover plate 24 is located at the end of the light-transmitting hole 251 away from the convex lens 23 and is threaded into the light-transmitting hole 251. It has a through hole that communicates with the light-transmitting hole 251 and abuts against the convex lens fixing ring 26 so that the position of the convex lens fixing ring 26 in the light-transmitting hole 251 along the axis of the optical path receiver 22 can be adjusted through thread transmission, that is, the distance between the convex lens 23 and the torch tube can be adjusted.

[0034] It is understood that the adjusting component 3 is located around the flange connector 25 to press against the flange connector 25.

[0035] It is understood that the threaded engagement between the rear cover plate 24 and the light-transmitting hole 251 can push the convex lens fixing ring 26 to move on the axis of the optical path receiver 22, thereby adjusting the distance between the convex lens 23 and the torch tube. In other words, by changing the dimensions of the flange connector 25 and / or the rear cover plate 24 along the axis of the optical path receiver 22, the distance between the convex lens 23 and the torch tube can be adjusted.

[0036] In this embodiment, to ensure a sealing effect, at least half of the threads on the rear cover plate 24 must be screwed into the flange connector 25.

[0037] Furthermore, a sealing gasket is provided between the convex lens retaining ring 26 and the convex lens 23 to ensure overall sealing.

[0038] Furthermore, the optical path receiver 22 is also provided with a flat mirror slot, in which a flat mirror 253 is provided.

[0039] It is understandable that the inner diameter of the through hole at the front end of the optical path receiver 22 is smaller than the diameter of the lens (convex lens 23, flat lens 253). In this way, the inner hole of this component can act as an aperture, limiting the imaging beam and field of view, reducing interference from non-sample excitation light, and improving the resolution of the instrument.

[0040] It is understandable that the choice of whether to install a flat mirror slot and flat mirror 253 depends on the purpose of the instrument. The design purpose of this structure is to enhance the sealing performance while hardly changing the optical path transmission performance, making it suitable for medium and high radiation glove boxes with high requirements for sealing performance.

[0041] Furthermore, a flat mirror back cover 254 is provided between the flat mirror 253 and the convex mirror 23.

[0042] It is understandable that the back cover 254 of the flat mirror can be of any structure and any material, as long as it can fix the flat mirror 253 and does not affect the transmission of light signals.

[0043] Furthermore, a convex lens front cover 231 is provided between the convex lens 23 and the optical path receiver 22.

[0044] It is understandable that the front cover 231 of the convex lens can be of any structure and any material, as long as it can fix the convex lens 23, can install a sealing gasket to press tightly against the convex lens, and does not affect the transmission of optical signals.

[0045] Furthermore, the optical path receiver 22 is provided with a gas quick-connect interface, which is located at one end of the optical path receiver 22 near the flange connector 25, for filling the optical path with protective gas and reducing the influence of air on the background of some analytical samples.

[0046] It is understandable that the protective gas can be nitrogen, helium, etc., and different gases can be selected according to specific needs.

[0047] Furthermore, the optical receiver 22 is threadedly connected to the condenser 21.

[0048] Furthermore, the optical receiver 22 is connected to the flange connector 25 by a thread.

[0049] Furthermore, the concentrator 21 is a ceramic concentrator.

[0050] The working principle of this invention is as follows: When connecting the glove box to the ICP-AES instrument via optical path, differences in processing methods between different components inevitably introduce errors, thereby altering the relative positions of the optical path and torch, leading to mismatches in installation and design dimensions. This results in the optical path center failing to accurately align with the sample flame core and acquire the strongest sample light signal, reducing the sample light intensity reaching the optical chamber through the convex lens 23, and increasing the equipment's detection limit. This effect intensifies with long-term installation stress and component use and aging, impacting the analytical capability in the later stages of the equipment's lifespan. Therefore, this device is introduced to compensate for the errors introduced by differences in processing methods between different components, maintaining high detection capability throughout the equipment's lifespan. When installing the enclosed ICP-AES optical path connection device, first connect the optical path receiving component 2 to the connecting flange 1, then connect the optical path receiving component 2 to the outer extension interface of the ICP-AES instrument's optical chamber. Next, based on the relationship between the ICP-AES instrument's optical chamber, the convex lens 23, and the sample flame core, fine adjustments are made using the adjusting component 3 until all three are aligned.

[0051] As can be seen from the above embodiments, the present invention can effectively ensure the collimation of the optical chamber, convex lens, and sample flame core of the ICP-AES instrument during the development of closed ICP-AES equipment and the closed modification of laboratory ICP-AES equipment, thereby improving the installation accuracy of the equipment, ensuring the testing performance of the instrument, and reducing the workload and cost of experimental device design, experimentation, and modification of existing instruments. Combined with the flexibly combinable optical path receiving components, the versatility and maintainability of this design in different types of equipment are further improved, indirectly extending the service life of the equipment and improving its economy.

[0052] Meanwhile, the design adopts an easy-to-disassemble modular design, which is highly flexible. The optical path receiver component of this design is a split type, and the optical path receiver can be quickly removed from the inside of the glove box. While ensuring the airtightness, it is convenient for users to clean and maintain the convex mirror. The good surface finish of the convex mirror helps to maintain the test sensitivity of the analytical instrument during long-term use.

[0053] In addition, after welding the connecting flange 1 to the glove box, the optical path receiving component can be replaced before analyzing radioactive samples, ensuring the instrument's analytical performance while meeting other usage requirements.

[0054] Furthermore, this device is compact in size, only 1.5cm longer in axial length (connection flange 1 thickness) than the device with a non-adjustable design, and the thickened part is located outside the glove box, without occupying the limited space inside the glove box; the diameter of the opening at the glove box is only 6mm larger than that of the non-adjustable design, and there is no other additional space occupied, ensuring the rational use of the limited space in the glove box.

[0055] The methods and systems described in this invention are not limited to the embodiments described in the specific implementation. Other implementation methods derived by those skilled in the art based on the technical solutions of this invention also fall within the scope of technical innovation of this invention.

Claims

1. A closed-loop ICP-AES optical path connection device, characterized in that, include: The system includes a connecting flange, an optical path receiving component, and an adjustment component. The connecting flange is located at the optical transmission point, the optical path receiving component is used to receive optical signals, the connecting flange is connected to the optical path receiving component, and the adjustment component is disposed on the connecting flange, located on a plane perpendicular to the axis of the optical path receiving component, and located around the optical path receiving component to press against the optical path receiving component and adjust the axial position of the optical path receiving component. The optical path receiving assembly includes a condenser, an optical path receiver, a convex lens, a rear cover plate, a flange connector, and a convex lens fixing ring. The optical path receiver is hollow inside, with one end connected to the condenser and the other end away from the condenser connected to the flange connector. The flange connector has a through light-transmitting hole that communicates with the optical path receiver. An internal thread is provided on the inner wall at the end away from the optical path receiver. The convex lens retaining ring is disposed in the light-transmitting hole, between the internal thread and the optical path receiver. The convex lens is disposed in the convex lens retaining ring. The rear cover plate is located at the end of the light-transmitting hole away from the convex lens and is threaded into the light-transmitting hole. It has a through hole communicating with the light-transmitting hole and abuts against the convex lens fixing ring. The optical path receiver is also provided with a flat mirror groove, located at one end of the optical path receiver near the flange connector, and contains a flat mirror.

2. The enclosed ICP-AES optical path connection device as described in claim 1, characterized in that: The number of adjustment components is three, and all three adjustment components are disposed on the connecting flange to press the optical path receiving component from a first direction and a second direction, wherein the first direction and the second direction are perpendicular to each other.

3. The enclosed ICP-AES optical path connection device as described in claim 1, characterized in that: The adjustment assembly includes a base and an adjustment bolt. The base is connected to the connecting flange and is located around the optical path receiving assembly. The adjustment bolt is threaded to the base and is perpendicular to the axis of the optical path receiving assembly. The optical path receiving assembly is pressed against it through the threaded transmission between the adjustment bolt and the base.

4. The enclosed ICP-AES optical path connection device as described in claim 1, characterized in that: A sealing gasket is provided between the convex mirror fixing ring and the convex mirror.

5. A closed ICP-AES optical path connection device as described in claim 1, characterized in that... : A back cover for the flat mirror is also provided between the flat mirror and the convex mirror.

6. The enclosed ICP-AES optical path connection device as described in claim 1, characterized in that... : A convex lens front cover is also provided between the convex lens and the optical path receiver, and a sealing gasket is provided between the convex lens front cover and the convex lens.

7. The enclosed ICP-AES optical path connection device as described in claim 1, characterized in that: The optical receiver is equipped with a gas quick-connect interface.

8. The enclosed ICP-AES optical path connection device as described in claim 7, characterized in that: The optical path receiver is threadedly connected to the concentrator, and the gas quick-connect interface is located at one end of the optical path receiver near the flange connector.

Images