Vacuum ultraviolet parallel beam instrument

Abstract

The utility model relates to the technical field of detection instruments, in particular to a vacuum ultraviolet parallel beam instrument which comprises a beam instrument body, and a radiation cavity and a parallel light channel cavity arranged on one side of the radiation cavity are arranged in the beam instrument body. A light output port communicated with the parallel light channel cavity is formed in the radiation cavity, an ultraviolet lamp tube is arranged above the light output port, and the axial direction of the ultraviolet lamp tube is perpendicular to the axial direction of the parallel light channel cavity; a gas inlet is formed in one side of the radiation cavity, and a gas outlet is formed in one side of the parallel light channel cavity, so that the radiation cavity and the parallel light channel cavity are filled with gas which does not react with ultraviolet rays. The structure of the vacuum ultraviolet parallel beam instrument is simplified, multiple radiation cavities are not needed during detection, the sealing degree in the detection process is ensured, it can be ensured that ultraviolet parallel light is emitted without multiple adjustment, and the detection accuracy is improved.

Description

Technical Field

[0001] This utility model relates to the field of detection instrument technology, and in particular to a vacuum ultraviolet parallel beam instrument. Background Technology

[0002] Ultraviolet (UV) light can destroy the structure of bacteria and viruses and is currently widely used for disinfection and the degradation of organic matter. The 185nm UV band can be used to degrade total organic matter (TOC) in ultrapure water. This band of UV light is characterized by high energy but weak penetrating power. Determining the effective dose of 185nm UV light during TOC degradation is crucial for accurately assessing the efficiency of organic matter or TOC removal. However, because 185nm UV light produces ozone when irradiating air, which can damage equipment, and because this band is easily absorbed by air, water, and other media, quantitative testing is difficult. Currently, there is no mature technology in China to determine the dosage of 185nm UV light.

[0003] Existing vacuum ultraviolet parallel beam instruments, whose main components include the radiation chamber assembly and the light intensity sensor assembly, have a complex overall structure and are cumbersome to use. During the measurement of the effective ultraviolet dose, the detection entrance channel must be continuously opened to control the lifting device to enter and exit the radiation chamber. Furthermore, the rotation of the handle-driven shaft must be adjusted based on the rotation angle markings to ensure the accuracy of Petri (GB / T 32092 2015 Ultraviolet Disinfection Technical Terminology 2.38: In Quasi-parallel light testing, describing the parallelism parameter of ultraviolet light) measurement. In actual testing, this not only makes operation cumbersome but also affects the sealing of the device, thus impacting the final experimental results. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art. This invention provides a vacuum ultraviolet parallel beam instrument, which has a simple operation process and improves detection accuracy.

[0005] To solve the above problems, this utility model proposes a vacuum ultraviolet parallel beam instrument, including a beam instrument body, wherein the beam instrument body is provided with a radiation cavity and a parallel light channel cavity disposed on one side of the radiation cavity;

[0006] The radiation cavity is provided with a light output port that communicates with the parallel light channel cavity. An ultraviolet lamp tube is provided above the light output port. The axial direction of the ultraviolet lamp tube is perpendicular to the axial direction of the parallel light channel cavity.

[0007] An air inlet is provided on one side of the radiation cavity, and an exhaust outlet is provided on one side of the parallel light channel cavity, so that the interior of the radiation cavity and the parallel light channel cavity is filled with gas that does not react with ultraviolet light.

[0008] As an improvement to the above technical solution, an electric drive device is also provided inside the radiation cavity, and a light shield is provided between the ultraviolet lamp tube and the light output port. The electric drive device is connected to the light shield and can drive the light shield to move along the light output port to change the amount of light transmitted through the light output port.

[0009] As an improvement to the above technical solution, a lamp holder is also included, wherein the ultraviolet lamp tube is fixed inside the radiation cavity by the lamp holder.

[0010] As an improvement to the above technical solution, the electric drive device includes a housing and a telescopic electric push rod, which is connected to the light shield.

[0011] One end of the ultraviolet lamp tube is fixed to the housing of the electric drive device, and the other end is suspended in the radiation cavity.

[0012] As an improvement to the above technical solution, the distance between the upper surface of the housing of the electric drive device and the bottom of the radiation cavity is h1, the distance between the upper surface of the electric push rod and the bottom of the radiation cavity is h2, and the distance between the upper surface of the light shield and the bottom of the radiation cavity is h3, where h1 > h2 > h3.

[0013] As an improvement to the above technical solution, the ultraviolet lamp tube is installed at the center of the radiation cavity, and the ultraviolet lamp tube is a dual-wavelength lamp tube; and / or, the ultraviolet lamp tube is a U-shaped ultraviolet lamp tube with a power of 20-75w.

[0014] As an improvement to the above technical solution, the gas input through the air inlet is nitrogen or argon.

[0015] An oxygen content sensor is installed inside the radiation cavity.

[0016] As an improvement to the above technical solution, the top of the radiation cavity is provided with an opening and closing cover, and the bottom of the parallel light channel cavity is provided with a material carrying platform;

[0017] The radiation cavity and the opening / closing cover, as well as the parallel light channel cavity and the material carrier, are sealed together by a sealing ring.

[0018] As an improvement to the above technical solution, the loading platform is a liftable loading platform used to place sample dishes and magnetic stirrers.

[0019] As an improvement to the above technical solution, the inner walls of the radiation cavity and the parallel light channel cavity are provided with a light-absorbing coating.

[0020] The following are the beneficial effects of implementing this utility model:

[0021] This invention relates to a vacuum ultraviolet parallel beam apparatus, comprising an apparatus body containing a radiation cavity and a parallel light channel cavity located on one side of the radiation cavity. The radiation cavity contains a light output port communicating with the parallel light channel cavity. Ultraviolet light emitted from the ultraviolet lamp passes through the radiation cavity and the parallel light channel cavity, radiating onto a sample dish below the parallel light channel cavity.

[0022] First, the UV lamp tube located above the line output port has its axial direction perpendicular to the axial direction of the parallel light channel cavity. When UV light passes through the parallel light channel cavity, light rays parallel to the axial direction of the parallel light channel cavity can pass directly, ensuring that all UV light passing through the parallel light channel cavity is parallel UV light, allowing for accurate UV dose measurement. Second, an air inlet is located on one side of the radiation cavity, and an exhaust port is located on one side of the parallel light channel cavity. By filling the beam instrument with a gas that does not react with UV light, air is completely expelled, effectively preventing ozone generation during testing. This simplifies the detection process, effectively improves detection accuracy, and enables effective dose detection of 185nm UV light. Furthermore, it reduces the sealing requirements of the parallel beam instrument. Attached Figure Description

[0023] Figure 1 This is a perspective view of a vacuum ultraviolet parallel beam apparatus according to an embodiment of the present invention;

[0024] Figure 2 This is a front view of a vacuum ultraviolet parallel beam apparatus according to an embodiment of the present invention;

[0025] Figure 3 This is a longitudinal cross-sectional view of a vacuum ultraviolet parallel beam instrument according to an embodiment of this utility model. Detailed Implementation

[0026] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0027] See Figures 1 to 3 As shown, this utility model embodiment provides a vacuum ultraviolet parallel beam instrument, including a beam instrument body, wherein the beam instrument body is provided with a radiation cavity 1 and a parallel light channel cavity 2 disposed on one side of the radiation cavity 1.

[0028] This invention improves the internal structure of the vacuum ultraviolet parallel beam instrument, eliminating the need for complicated operating procedures and ensuring that the emitted light is parallel ultraviolet light, thus reducing the chance of oxygen entering during operation.

[0029] Specifically, the radiation cavity 1 is provided with a light output port 22 that communicates with the parallel light channel cavity 2, and an ultraviolet lamp tube 3 is provided above the light output port 22. The axial direction of the ultraviolet lamp tube 3 is perpendicular to the axial direction of the parallel light channel cavity 2.

[0030] The radiation cavity 1 is provided with an air inlet 11 on one side, and the parallel light channel cavity 2 is provided with an exhaust port 21 on one side, so that the interior of the radiation cavity 1 and the parallel light channel cavity 2 is filled with a gas that does not react with ultraviolet light.

[0031] The axial direction of the ultraviolet lamp tube 3 is perpendicular to the axial direction of the parallel light channel 2 cavity. Specifically, it can be a T-shaped connection, but is not limited to this.

[0032] In some embodiments, the ultraviolet lamp tube 3 is installed in the middle of the radiation cavity 1, and the ultraviolet light emitted by the ultraviolet lamp tube passes through the radiation cavity and the parallel light channel cavity, radiating onto the sample dish below the parallel light channel cavity. Preferably, the ultraviolet lamp tube 3 is installed in the center of the radiation cavity 1, and the light input port 22 can be irradiated with a sufficient amount of ultraviolet light.

[0033] In some embodiments, the ultraviolet lamp tube 3 is a dual-wavelength lamp tube, which combines the advantages of UVC and UVA. In the field of water treatment, UVC can kill microorganisms, while UVA can promote certain chemical reactions and improve the water purification effect.

[0034] In some embodiments, the ultraviolet lamp tube 3 can be selected from commercially available ultraviolet light source devices. Preferably, the ultraviolet lamp tube 3 is a U-shaped ultraviolet lamp tube with a power of 20-75W. Exemplary values ​​include 25W, 30W, 35W, 40W, 45W, 50W, 55W, 60W, 65W, and 70W, but it is not limited to these. When the power of the U-shaped ultraviolet lamp tube is too low, its luminous power is too low, resulting in severe attenuation during propagation in the parallel light channel cavity, affecting the test results. When the power of the U-shaped ultraviolet lamp tube is too high, it easily leads to power waste.

[0035] In some embodiments, the gas input through the air inlet 11 can be a common, chemically inert gas, specifically nitrogen or an inert gas, but not limited to these. By filling the radiation cavity with nitrogen or an inert gas, a completely oxygen-free environment is provided, ensuring that the 185nm ultraviolet band will not come into contact with air to produce ozone, which would affect subsequent experiments. Moreover, a nitrogen or inert gas inlet is provided on the outside of the radiation cavity, and an outlet is provided at the bottom of the parallel optical channel cavity to guide the nitrogen or inert gas out, which can ensure that the radiation cavity is always filled with nitrogen or inert gas, reducing errors caused by air. Preferably, the air inlet is a one-way inlet, and the air outlet is a one-way outlet.

[0036] Working principle of this utility model embodiment:

[0037] During operation, firstly, a gas that does not react with ultraviolet light is injected into the air inlet 11 of the radiation cavity 1. This gas is then discharged from the exhaust port 21 of the parallel light channel 2, allowing all the air inside the beam apparatus to be completely expelled until it is filled with the gas that does not react with ultraviolet light. Next, the ultraviolet lamp tube 3 is powered on, and it emits light towards the light output port 22. Since the axial direction of the ultraviolet lamp tube 3 is perpendicular to the axial direction of the parallel light channel cavity 2, only ultraviolet light rays parallel to the axial direction of the parallel light channel cavity 2 can pass through it, thus allowing the test sample at the parallel light channel cavity to be irradiated with parallel ultraviolet light.

[0038] Compared to existing technologies, this invention firstly avoids ozone generation during testing by filling the device with a gas that does not react with ultraviolet light, thus completely expelling all oxygen. This reduces the sealing requirements of the parallel beam instrument. Secondly, because the axial direction of the ultraviolet lamp tube 3 above the light output port 2 is perpendicular to the axial direction of the parallel light channel cavity 2, only light rays parallel to the axial direction of the parallel light channel cavity 2 can pass directly through. This simple structure ensures that all ultraviolet light emitted from the parallel light channel cavity 2 is parallel, improving the accuracy of ultraviolet dose measurement.

[0039] Furthermore, during the ultraviolet parallel light test, it is necessary to change the amount of light entering the parallel light channel cavity 2 to test the effect of different amounts of light entering the test. Preferably, the radiation cavity 1 is also equipped with an electric drive device 4, and a light shield 5 is provided between the ultraviolet lamp tube 3 and the light output port 22. The electric drive device 4 is connected to the light shield 5 and can drive the light shield 5 to move along the light output port 22 to change the amount of light passing through the light output port 22. The electric drive device 4 is set in the radiation cavity 1, and the electric drive device 4 drives the light shield 5 to block the light input port 22 to a certain extent. The electric drive device 4 can be wirelessly connected and its working status can be remotely controlled by external personnel. Therefore, this embodiment can complete the adjustment of the amount of light entering the cavity without opening the radiation cavity 1. This reduces the complexity of operation and avoids the generation of ozone by air entering the radiation cavity 1 due to repeated opening of the cavity.

[0040] Preferably, in a specific embodiment, a lamp holder is also included, and the ultraviolet lamp tube 3 is fixed inside the radiation cavity 1 by the lamp holder. The lamp holder supports and fixes one end of the ultraviolet lamp tube 3.

[0041] More preferably, the electric drive device 4 includes a housing 41 and a telescopic electric push rod 42, which is connected to the light shield 5.

[0042] One end of the ultraviolet lamp tube 3 is fixed to the housing 41 of the electric drive device, and the other end is suspended in the radiation cavity 1.

[0043] The telescopic electric push rod 42 can increase the travel of the light shield 5 on the light output port 22. In addition, the ultraviolet lamp tube 3 is fixed to the housing 41 of the electric drive device at one end, and its whole body is suspended in the radiation cavity. The suspended setting can reduce the obstruction of the ultraviolet lamp tube 3 and ensure the disinfection effect of the ultraviolet lamp tube 3.

[0044] More preferably, the distance between the upper surface of the housing 41 of the electric drive device and the bottom of the radiation cavity 1 is h1, the distance between the upper surface of the electric push rod 42 and the bottom of the radiation cavity 1 is h2, and the distance between the upper surface of the light shield 5 and the bottom of the radiation cavity 1 is h3, where h1 > h2 > h3.

[0045] The distances from the outer casing 41 of the electric drive device, the upper surface of the electric push rod 42, and the upper surface of the light-shielding plate 5 to the bottom of the radiation cavity 1 gradually decrease. Firstly, this prevents the light-shielding plate 5 from colliding with the ultraviolet lamp tube 3 during sliding, ensuring smooth movement of the light-shielding plate 5 and extending the lifespan of the ultraviolet lamp tube 3. Secondly, the reserved height difference allows for sufficient spacing between the ultraviolet lamp tube 3 and the light-shielding plate 5, reducing obstruction of the ultraviolet lamp tube 3 and minimizing the impact on the disinfection effect.

[0046] During the test, it is necessary to ensure that the oxygen content inside the beam apparatus is zero. Preferably, an oxygen content sensor can be installed inside the radiation cavity 1. This sensor monitors the oxygen content inside the device in real time. When the measured value meets the experimental requirements, the ultraviolet lamp tube 3 can be powered on immediately, further improving the accuracy of the test results.

[0047] Preferably, the top of the radiation cavity 1 is provided with an opening and closing cover 12, and the bottom of the parallel light channel cavity 2 is provided with a material carrying platform 23;

[0048] The radiation cavity 1 and the opening / closing cover 12, as well as the parallel light channel cavity 2 and the material carrier stage 23, are sealed together by sealing rings. The entire radiation cavity 1 and the parallel light channel cavity 2 are sealed to prevent external air from seeping into the instrument through gaps in the opening / closing cover 12 or the material carrier stage 23 during operation.

[0049] In some embodiments, the loading stage 23 can be a liftable loading stage, capable of automatically raising the sample dish and magnetic stirrer placed on its surface to the parallel light channel cavity 2. No human contact is required during the entire sample placement process. First, this reduces contamination of the sample in the sample dish due to human operation. Second, it improves the automation level of the testing instrument. In this embodiment, ultraviolet parallel light from the parallel light channel cavity 2 irradiates the sample dish, and the magnetic stirrer inside the sample dish stirs the sample, allowing the liquid in the sample dish to fully absorb the ultraviolet parallel light.

[0050] Because the inner walls of radiation cavity 1 and parallel light channel cavity 2 reflect ultraviolet light, a small amount of ultraviolet light that is not parallel to the axial direction of parallel light channel cavity 2 irradiates the sample, affecting the detection accuracy of the instrument.

[0051] Therefore, in some embodiments, a light-absorbing coating is provided on the inner walls of the radiation cavity 1 and the parallel light channel cavity 2. This light-absorbing coating absorbs the ultraviolet light irradiated onto the inner wall, ensuring that only parallel ultraviolet light parallel to its axial direction can pass through the parallel light channel cavity 2, further improving the accuracy of the instrument's detection. Optionally, the light-absorbing coating can be a commercially available coating that absorbs light, such as black paint, but is not limited to this.

[0052] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A vacuum ultraviolet parallel beam instrument, characterized by, Includes a beam apparatus body, wherein the beam apparatus body has a radiation cavity and a parallel optical channel cavity located on one side of the radiation cavity; The radiation cavity is provided with a light output port that communicates with the parallel light channel cavity. An ultraviolet lamp tube is provided above the light output port. The axial direction of the ultraviolet lamp tube is perpendicular to the axial direction of the parallel light channel cavity. An air inlet is provided on one side of the radiation cavity, and an exhaust outlet is provided on one side of the parallel light channel cavity, so that the interior of the radiation cavity and the parallel light channel cavity is filled with gas that does not react with ultraviolet light.

2. The vacuum ultraviolet beamline of claim 1, wherein, The radiation cavity is also equipped with an electric drive device. A light shield is provided between the ultraviolet lamp tube and the light output port. The electric drive device is connected to the light shield and can drive the light shield to move along the light output port to change the amount of light transmitted through the light output port.

3. The vacuum ultraviolet beamline of claim 1, wherein, It also includes a lamp holder, through which the ultraviolet lamp tube is fixed inside the radiation cavity.

4. The vacuum ultraviolet beamline of claim 2, wherein, The electric drive device includes a housing and a telescopic electric push rod, which is connected to the light shield. One end of the ultraviolet lamp tube is fixed to the housing of the electric drive device, and the other end is suspended in the radiation cavity.

5. The vacuum ultraviolet parallel beam instrument as described in claim 4, characterized in that, The distance from the upper surface of the housing of the electric drive device to the bottom of the radiation cavity is h1, the distance from the upper surface of the electric push rod to the bottom of the radiation cavity is h2, and the distance from the upper surface of the light shield to the bottom of the radiation cavity is h3, where h1 > h2 > h3.

6. The vacuum ultraviolet beamline of claim 1, wherein, The ultraviolet lamp tube is installed at the center of the radiation cavity, and the ultraviolet lamp tube is a dual-wavelength lamp tube; and / or, the ultraviolet lamp tube is a U-shaped ultraviolet lamp tube with a power of 20-75w.

7. The vacuum ultraviolet beamline of claim 1, wherein, The gas introduced through the air inlet is nitrogen or argon; An oxygen content sensor is installed inside the radiation cavity.

8. The vacuum ultraviolet beamline of claim 1, wherein, The top of the radiation cavity is provided with an opening and closing cover, and the bottom of the parallel light channel cavity is provided with a material carrying platform; The radiation cavity and the opening / closing cover, as well as the parallel light channel cavity and the material carrier, are sealed together by a sealing ring.

9. The vacuum ultraviolet beamline of claim 8, wherein, The loading platform is a liftable loading platform used to place sample dishes and magnetic stirrers.

10. The vacuum ultraviolet beamline of claim 1, wherein, The inner walls of the radiation cavity and the parallel light channel cavity are provided with light-absorbing coatings.

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