Sodium flame photometer for filters

Abstract

The application discloses a filter sodium flame photometer, which comprises a shell, a combustion assembly, a detection assembly, a gas mixing assembly and a gas feeding assembly, the inside of the shell is defined with a combustion chamber and a detection chamber which are separated from each other, a light hole is arranged between the combustion chamber and the detection chamber, a control panel is arranged on the shell, the detection assembly comprises a filter and a photomultiplier, the filter is arranged on the light hole, and the photomultiplier is arranged in the detection chamber, the gas mixing assembly comprises a mixing shell and a sampling head, the mixing shell is connected with the shell, a mixing chamber is defined in the mixing shell, the mixing chamber is located below the combustion chamber and is communicated with the combustion assembly through a connecting pipe, and the sampling head is arranged on the mixing shell and is communicated with the mixing chamber. According to the filter sodium flame photometer, the test gas can be detected more comprehensively, and the corrosion resistance detection of the test gas on the filter material is more accurate.

Description

Technical Field

[0001] This invention relates to the field of gas detection, and in particular to a sodium flame photometer for use with filters. Background Technology

[0002] In certain specific environments, filter materials need to possess a certain degree of corrosion resistance. Therefore, it is necessary to conduct corrosion tests on filter materials used in these environments. This is typically done by passing a test gas containing sodium through the filter material. Consequently, there are strict requirements regarding the sodium content in the test gas, necessitating precise measurement of the sodium content.

[0003] Flame photometers work by burning a specific gas, activating certain elements within the gas. This excites electrons in the atoms, causing inner-shell electrons to ionize and leave vacancies. These vacancies create instability, prompting higher-energy electrons to fill them—a process known as electron transitions. These higher-energy electrons then transition back to lower energy levels, releasing excess energy as photons, creating a specific spectrum. The flame photometer captures these spectra to determine the corresponding values. A sodium flame photometer is a type of flame photometer used to measure a specific spectrum, indicating the sodium content of an element.

[0004] However, current sodium flame photometers can only detect the sodium content in a test gas, and cannot detect other indicators of the test gas, such as its proportion, particle size, and distribution. This lack of comprehensive detection results in inaccurate assessment of the corrosion resistance of the test gas to filter materials. Therefore, improvements are needed. Summary of the Invention

[0005] This invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of this invention is to provide a sodium flame photometer for filters. By including a detection component, the sodium content in a test gas can be tested. By including a sampling head and connecting the sampling head to a mixing chamber, when personnel test the gas introduced into the sodium flame photometer, the sampling head can be connected to the detection instrument to detect the proportion, particle size, and distribution of the test gas in the mixing chamber. This allows for a more comprehensive detection of the test gas and more accurate testing of the corrosion resistance of the test gas to the filter material.

[0006] A sodium flame photometer for filters according to an embodiment of the present invention includes: a housing, wherein a combustion chamber and a detection chamber are defined inside the housing and separated from each other, a light-transmitting hole is provided between the combustion chamber and the detection chamber, and a control panel is mounted on the housing; a combustion assembly disposed in the combustion chamber; a detection assembly including a filter and a photomultiplier tube, the filter being disposed in the light-transmitting hole and the photomultiplier tube being disposed in the detection chamber; a gas mixing assembly including a mixing housing and a sampling head, the mixing housing being connected to the housing, a mixing chamber being defined inside the mixing housing, the mixing chamber being located below the combustion chamber and communicating with the combustion assembly through a connecting pipe, the sampling head being disposed in the mixing housing and communicating with the mixing chamber; and a gas supply assembly connected to the mixing housing, the gas supply assembly being adapted to supply sodium-containing gas into the mixing chamber.

[0007] According to an embodiment of the present invention, a sodium flame photometer for filters includes a detection component, which can test the sodium content in a test gas. Furthermore, by including a sampling head and connecting the sampling head to a mixing chamber, when personnel test the gas introduced into the sodium flame photometer, the sampling head can be connected to the detection instrument to detect the proportion, particle size, and distribution of the test gas in the mixing chamber. This allows for a more comprehensive detection of the test gas and more accurate testing of the corrosion resistance of the test gas to the filter material.

[0008] According to some embodiments of the present invention, the combustion assembly includes an igniter and an air intake chamber, the igniter being located above and communicating with the air intake chamber, and the air intake chamber being connected to the mixing chamber via a connecting pipe.

[0009] According to some embodiments of the present invention, the igniter is cylindrical and the central axis of the igniter extends in the vertical direction. The igniter is provided with a venting groove that extends circumferentially along the igniter and passes through the igniter vertically. The lower end of the venting groove is connected to the air inlet chamber.

[0010] According to some embodiments of the present invention, a combustion chamber shell is further included, which is disposed within and connected to the housing, and defines a combustion chamber therein. The combustion chamber shell includes a mounting plate located below the combustion assembly, and the combustion assembly is mounted on the mounting plate. The mounting plate is provided with a clearance hole, through which the connecting pipe passes.

[0011] According to some embodiments of the present invention, an exhaust pipe is connected to the lower side of the mounting plate, the exhaust pipe extends in the front-rear direction, one end of the exhaust pipe communicates with the combustion chamber, and an exhaust fan is installed at the other end of the exhaust pipe.

[0012] According to some embodiments of the present invention, the mounting plate includes a fixed plate and a rotating plate. The fixed plate is connected to and fixed relative to the housing. The rotating plate is circular and disposed on the lower side of the fixed plate. The rotating plate is rotatably connected to the fixed plate. The clearance hole includes a first clearance hole disposed on the fixed plate and a second clearance hole disposed on the rotating plate. The first clearance hole and the second clearance hole are opposite to and communicate with each other.

[0013] The fixed plate has a plurality of first vent holes, the rotating plate has a plurality of second vent holes, and the mounting plate has a first state and a second state. In the first state, the first vent holes and the second vent holes are opposite to and connected in the vertical direction; in the second state, the first vent holes and the second vent holes are completely offset in the vertical direction.

[0014] According to some embodiments of the present invention, a motor is provided below the rotating plate, the motor being connected to the rotating plate for driving the rotating plate to rotate relative to the fixed plate; and / or, the length of the second clearance hole along the circumferential direction of the rotating plate is greater than the length of the first clearance hole along the circumferential direction of the rotating plate.

[0015] According to some embodiments of the present invention, the top of the combustion chamber is provided with an exhaust pipe communicating with the combustion chamber, the top of the exhaust pipe is open to form an exhaust port, and a plurality of guide plates are provided at the exhaust port. The plurality of guide plates are arranged at intervals in the front-back direction, and in the direction from bottom to top, the guide plates extend backward at an angle.

[0016] According to some embodiments of the present invention, the housing is provided with an observation window for observing the combustion chamber.

[0017] According to some embodiments of the present invention, the gas delivery assembly includes a first gas delivery mechanism and a second gas delivery mechanism, the first gas delivery mechanism and the second gas delivery mechanism being disposed within the housing, the first gas delivery mechanism being adapted to deliver a sodium-containing gas, and the second gas delivery mechanism being adapted to deliver air.

[0018] The first air delivery mechanism includes a first air pump, a first air delivery pipe, a first connector and a first flow valve. One end of the first air delivery pipe is connected to the mixing shell, and the other end of the first air delivery pipe is connected to the first connector. The first air pump and the first flow valve are both located on the first air delivery pipe.

[0019] The second air delivery mechanism includes a second air pump, a second air delivery pipe, a second connector, and a second flow valve. One end of the second air delivery pipe is connected to the mixing housing, and the other end of the second air delivery pipe is connected to the second connector. The second air pump and the second flow valve are both located on the second air delivery pipe.

[0020] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0022] Figure 1 This is a three-dimensional schematic diagram of a sodium flame photometer for filters according to some embodiments of the present invention;

[0023] Figure 2 yes Figure 1 A cross-sectional view of the filter in the image using a sodium flame photometer;

[0024] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0025] Figure 4 yes Figure 1 A cross-sectional view of the filter in the middle from another angle using a sodium flame photometer;

[0026] Figure 5 yes Figure 1 A cross-sectional view of the filter in the middle using a sodium flame photometer at another angle;

[0027] Figure 6 yes Figure 1 A three-dimensional schematic diagram of a portion of the structure of a sodium flame photometer for use with filters;

[0028] Figure 7 yes Figure 2 A three-dimensional schematic diagram of the mounting plate.

[0029] Figure Labels

[0030] 100. Sodium flame photometer for filter application;

[0031] 1. Shell; 10. Combustion chamber; 11. Detection chamber; 12. Light transmission hole; 13. Control panel; 14. Observation window;

[0032] 2. Combustion assembly; 21. Igniter; 211. Vent duct; 22. Air intake chamber;

[0033] 3. Combustion chamber shell; 31. Mounting plate; 311. Clearance hole; 312. Fixing plate; 3121. First clearance hole; 3122. First vent hole; 313. Rotating plate; 3131. Second clearance hole; 3132. Second vent hole; 32. Motor;

[0034] 4. Exhaust pipe; 41. Exhaust port; 42. Guide plate;

[0035] 5. Exhaust pipe; 50. Exhaust fan;

[0036] 6. Detection components; 61. Filters; 62. Photomultiplier tubes;

[0037] 7. Gas mixing assembly; 71. Mixing housing; 72. Mixing chamber; 73. Connecting pipe; 74. Sampling head;

[0038] 8. Air delivery assembly; 81. First air delivery mechanism; 811. First air pump; 812. First air delivery pipe; 813. First connector; 814. First flow valve; 82. Second air delivery mechanism; 821. Second air pump; 822. Second air delivery pipe; 823. Second connector; 824. Second flow valve. Detailed Implementation

[0039] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0040] The following is for reference. Figures 1-7 A sodium flame photometer 100 for use with filters according to an embodiment of the present invention is described.

[0041] According to an embodiment of the present invention, a sodium flame photometer 100 for filters includes: a housing 1, a combustion assembly 2, a detection assembly 6, a gas mixing assembly 7, and a gas supply assembly 8.

[0042] The housing 1 defines a combustion chamber 10 and a detection chamber 11 that are separated from each other. A light-transmitting hole 12 is provided between the combustion chamber 10 and the detection chamber 11. A control panel 13 is installed on the housing 1. The combustion assembly 2 is located inside the combustion chamber 10.

[0043] The detection component 6 includes a filter 61 and a photomultiplier tube 62. The filter 61 is located in the light-transmitting hole 12, and the photomultiplier tube 62 is located in the detection chamber 11.

[0044] The mixing assembly 7 includes a mixing housing 71 and a sampling head 74. The mixing housing 71 is connected to the housing 1. A mixing chamber 72 is defined inside the mixing housing 71. The mixing chamber 72 is located below the combustion chamber 10 and is connected to the combustion assembly 2 through a connecting pipe 73. The sampling head 74 is located in the mixing housing 71 and is connected to the mixing chamber 72.

[0045] The gas supply assembly 8 is connected to the mixing housing 71 and is adapted to supply sodium-containing gas into the mixing chamber 72.

[0046] For example, the control panel 13 can be electrically connected to both the combustion assembly 2 and the detection assembly 6. Relevant personnel can operate the control panel 13 via touch to turn the combustion assembly 2 on or off, and the detection assembly 6 can transmit the detected results to the control panel 13 for monitoring by relevant personnel.

[0047] Reference Figure 4 By including a filter 61 and a photomultiplier tube 62 in the detection component 6, the filter 61 can filter the light flame of gas combustion, preventing any spectrum other than that containing sodium from entering the photomultiplier tube 62, thus improving the accuracy of the test. Furthermore, by placing the filter 61 in the light-transmitting aperture 12, compared to placing the filter 61 in the detection chamber 11 in related technologies, the distance between the detection component 6 and the light flame can be shortened, reducing spectral dissipation during its entry into the sampling area and improving test accuracy.

[0048] By including a sampling head 74 in the gas mixing assembly 7 and connecting the sampling head 74 to the mixing chamber 72, when personnel are testing the gas introduced into the sodium flame photometer, the sampling head 74 can be connected to the testing instrument. This facilitates the detection of the proportion, particle size, and distribution of the test gas within the mixing chamber 72, resulting in more accurate sampling and simpler operation. Furthermore, during flame detection of the gas, the sampling head 74 can sample and record the test gas within the mixing chamber 72 in real time. Personnel can adjust the gas mixing ratio based on the flame detection results and the detection results from the testing device connected to the sampling head 74 to determine the optimal mixing ratio, which is beneficial for subsequent filter testing.

[0049] For example, personnel can connect the sampling head 74 to a particle counter to detect the particle size of the gas in the mixing chamber 72.

[0050] Reference Figures 1-4 When using a sodium flame photometer 100 for gas detection, sodium-containing gas can be delivered to the mixing chamber 72 via the gas delivery assembly 8. After thorough mixing, the sampling head 74 can be connected to the detection instrument to detect the proportion, particle size, and distribution of the gas in the mixing chamber 72. This effectively controls the proportion of the test gas, allowing for the preparation of different proportions of test gases to suit the corrosion resistance performance of different filters in various environments. After confirming that the test gas meets the requirements, relevant personnel operate the control panel 13 to control the combustion assembly 2 to ignite the gas. The resulting flame passes through the filter light plate 61 and is received by the photomultiplier tube 62. The photomultiplier tube 62 converts the light signal into an electrical signal and transmits it to the control panel 13 for detection and monitoring by relevant personnel.

[0051] According to an embodiment of the present invention, the sodium flame photometer 100 for filters includes a detection component 6, which can test the sodium content in the test gas. Furthermore, by including a sampling head 74 and connecting the sampling head 74 to a mixing chamber 72, when personnel test the gas introduced into the sodium flame photometer, the sampling head 74 can be connected to the testing instrument to detect the proportion, particle size, and distribution of the test gas within the mixing chamber 72. This allows for a more comprehensive detection of the test gas and more accurate testing of the corrosion resistance of the test gas to the filter material.

[0052] Reference Figure 2 According to some embodiments of the present invention, the combustion assembly 2 includes an igniter 21 and an intake chamber 22. The igniter 21 is located above and communicates with the intake chamber 22. The intake chamber 22 is connected to the mixing chamber 72 via a connecting pipe 73. Gas supplied from the gas supply assembly 8 first enters the mixing chamber 72, and then is supplied from the mixing chamber 72 to the intake chamber 22 via the connecting pipe 73. The test gas in the intake chamber 22 enters the igniter 21 and is ignited to produce a flame. By including an igniter 21 and an intake chamber 22 in the combustion assembly 2, the gas can be buffered in the intake chamber 22.

[0053] Reference Figure 2 and Figure 3 According to some embodiments of the present invention, the igniter 21 is cylindrical and its central axis extends vertically. A venting groove 211 is provided inside the igniter 21, extending circumferentially and penetrating vertically through it. The lower end of the venting groove 211 is connected to the air inlet chamber 22. By providing the venting groove 211 inside the igniter 21, when gas enters the air inlet chamber 22, the gas can flow from bottom to top through the venting groove 211, eventually reaching the top of the venting groove 211 and being ignited by the igniter 21. This reduces the problem of incomplete combustion caused by gas leakage.

[0054] Reference Figure 2 According to some embodiments of the present invention, the sodium flame photometer 100 for filters further includes a combustion chamber shell 3, which is disposed within and connected to the housing 1. The combustion chamber shell 3 defines a combustion chamber 10. The combustion chamber shell 3 includes a mounting plate 31 located below the combustion assembly 2, and the combustion assembly 2 is mounted on the mounting plate 31. The mounting plate 31 has a clearance hole 311 through which a connecting pipe 73 passes. By mounting the combustion assembly 2 on the mounting plate 31, the installation of the combustion assembly 2 can be made more stable. By providing a clearance hole 311 on the mounting plate 31 and allowing the connecting pipe 73 to pass through it, interference between the mounting plate 31 and the connecting pipe 73 can be avoided, allowing the connecting pipe 73 to pass gas from the mixing chamber 72 into the intake chamber 22.

[0055] Reference Figure 2 According to some embodiments of the present invention, an exhaust pipe 5 is connected to the lower side of the mounting plate 31. The exhaust pipe 5 extends in the front-to-back direction, with one end connected to the combustion chamber 10 and the other end of the exhaust pipe 5 equipped with an exhaust fan 50. After the gas combustion in the combustion chamber 10 is completed, some gas residue may still remain. This residual gas will affect the accuracy of the next test. By connecting the lower side of the mounting plate 31 to the exhaust pipe 5 and installing an exhaust fan 50 at the other end of the exhaust pipe 5, the exhaust fan 50 can blow air from inside the housing 1 into the exhaust pipe 5. The gas flows into the combustion chamber 10 through the exhaust pipe 5, squeezing out the residual combustion gas in the combustion chamber 10 and reducing the impact of residual gas on the next test.

[0056] Reference Figure 7 According to some embodiments of the present invention, the mounting plate 31 includes a fixed plate 312 and a rotating plate 313. The fixed plate 312 is connected to and fixed relative to the housing 1. The rotating plate 313 is circular and located on the lower side of the fixed plate 312. The rotating plate 313 is rotatably connected to the fixed plate 312. The clearance hole 311 includes a first clearance hole 3121 provided on the fixed plate 312 and a second clearance hole 3131 provided on the rotating plate 313. The first clearance hole 3121 and the second clearance hole 3131 are opposite to and communicate with each other.

[0057] The fixed plate 312 has multiple first vent holes 3122, and the rotating plate 313 has multiple second vent holes 3132. The mounting plate 31 has a first state and a second state. In the first state, the first vent holes 3122 and the second vent holes 3132 are opposite to each other and connected in the vertical direction. In the second state, the first vent holes 3122 and the second vent holes 3132 are completely staggered in the vertical direction.

[0058] When gas is burning in the combustion chamber 10, the mounting plate 31 can be in the second state. At this time, the mounting plate 31 isolates the exhaust pipe 5 from the combustion chamber 10, preventing gas from flowing out of the combustion chamber 10 through the exhaust pipe 5.

[0059] When the combustion of gas in the combustion chamber 10 is completed and it is necessary to discharge the residual gas in the combustion chamber 10, the mounting plate 31 can be placed in the first equipment and the exhaust fan 50 can be turned on. At this time, the exhaust pipe 5 is connected to the combustion chamber 10. The exhaust fan 50 rotates and drives air through the exhaust pipe 5 through the second vent 3132 and the first vent 3122 into the combustion chamber 10, squeezing out the residual combustion gas in the combustion chamber 10 and reducing the impact of residual gas on the next test.

[0060] Reference Figure 7According to some embodiments of the present invention, a motor 32 is provided below the rotating plate 313, and the motor 32 is connected to the rotating plate 313 to drive the rotating plate 313 to rotate relative to the fixed plate 312. By providing a motor 32 below the rotating plate 313 and connecting the motor 32 to drive the rotating plate 313 to rotate relative to the fixed plate 312, the rotating plate 313 can be driven to rotate by the motor 32. For example, the motor 32 can be electrically connected to the control panel 13, and an operator can control the motor 32 by operating the control panel 13, thereby driving the rotating plate 313 to rotate relative to the fixed plate 312.

[0061] Reference Figure 7 According to some embodiments of the present invention, the length of the second clearance hole 3131 along the circumferential direction of the rotating plate 313 is greater than the length of the first clearance hole 3121 along the circumferential direction of the rotating plate 313. By making the length of the second clearance hole 3131 along the circumferential direction of the rotating plate 313 greater than the length of the first clearance hole 3121 along the circumferential direction of the rotating plate 313, interference between the rotating plate 313 and the connecting pipe 73 can be avoided when the rotating plate 313 rotates relative to the fixed plate 312.

[0062] Reference Figures 2-6 According to some embodiments of the present invention, the top of the combustion chamber 10 is provided with an exhaust pipe 4 communicating with the combustion chamber 10. The top of the exhaust pipe 4 is open to form an exhaust port 41. Multiple guide plates 42 are provided at the exhaust port 41, and the guide plates 42 are spaced apart in a front-to-back direction. In the upward direction, the guide plates 42 extend backward at an angle. By opening the top of the exhaust pipe 4 to form the exhaust port 41, the combustion products of the gas can be discharged through the exhaust port 41. By providing multiple guide plates 42 at the exhaust port 41, and having the guide plates 42 extend backward at an angle from bottom to top, the guide plates 42 can guide the airflow backward, preventing the combustion gases from affecting personnel in front of the equipment. Combustion of gas in the combustion chamber 10 can cause dust accumulation in the exhaust pipe 4. By providing an exhaust pipe 4 communicating with the combustion chamber 10 at the top, personnel can periodically remove the exhaust pipe 4 from the top of the combustion chamber 10 for cleaning, preventing blockage of the exhaust port 41.

[0063] Reference Figure 1 and Figure 2 According to some embodiments of the present invention, the housing 1 is provided with an observation window 14 for observing the combustion chamber 10. By providing an observation window 14 on the housing 1 for observing the combustion chamber 10, when the gas is burning in the combustion chamber 10, relevant personnel can observe the combustion status of the gas through the observation window 14.

[0064] Reference Figure 5 and Figure 6According to some embodiments of the present invention, the gas delivery assembly 8 includes a first gas delivery mechanism 81 and a second gas delivery mechanism 82, which are disposed in the housing 1. The first gas delivery mechanism 81 is adapted to deliver a gas containing sodium, and the second gas delivery mechanism 82 is adapted to deliver air.

[0065] The first air supply mechanism 81 includes a first air pump 811, a first air supply pipe 812, a first connector 813, and a first flow valve 814. One end of the first air supply pipe 812 is connected to the mixing housing 71, and the other end of the first air supply pipe 812 is connected to the first connector 813. The first air pump 811 and the first flow valve 814 are both located on the first air supply pipe 812.

[0066] The second air supply mechanism 82 includes a second air pump 821, a second air supply pipe 822, a second connector 823, and a second flow valve 824. One end of the second air supply pipe 822 is connected to the mixing housing 71, and the other end of the second air supply pipe 822 is connected to the second connector 823. The second air pump 821 and the second flow valve 824 are both located on the second air supply pipe 822.

[0067] When the gas delivery assembly 8 delivers gas into the mixing chamber 72, the first connector 813 is connected to a sodium-containing gas source, and the second connector 823 is connected to a compressed air gas source. The first air pump 811 drives gas through the first connector 813 into the first air delivery pipe 812. The gas in the first air delivery pipe 812 is flow-limited by the first flow valve 814 before entering the mixing chamber 72. The second air pump 821 drives gas through the second connector 823 into the second air delivery pipe 822. The gas in the second air delivery pipe 822 is flow-limited by the second flow valve 824 before entering the mixing chamber 72.

[0068] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0069] In the description of this invention, "first feature" and "second feature" may include one or more of the features.

[0070] In the description of this invention, "a plurality of" means two or more.

[0071] In the description of this invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0072] In the description of this invention, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature.

[0073] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0074] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A sodium flame photometer for filters, characterized in that, include: The housing defines a combustion chamber and a detection chamber that are separated from each other. A light-transmitting hole is provided between the combustion chamber and the detection chamber. A control panel is installed on the housing. The combustion assembly is located within the combustion chamber; The detection component includes a filter and a photomultiplier tube, wherein the filter is disposed in the light-transmitting hole and the photomultiplier tube is disposed in the detection chamber; A combustion chamber shell is disposed within and connected to the housing, defining a combustion chamber within the combustion chamber shell. The combustion chamber shell includes a mounting plate located below the combustion assembly, which is mounted on the mounting plate. The mounting plate includes a fixed plate and a rotating plate. The fixed plate is connected to and fixed relative to the housing. The rotating plate is circular and located below the fixed plate, rotatably connected to the fixed plate. The fixed plate has multiple first vent holes, and the rotating plate has multiple second vent holes. The mounting plate has a first state and a second state. In the first state, the first vent holes and the second vent holes are opposite and connected in the vertical direction. In the second state, the first vent holes and the second vent holes are completely offset in the vertical direction. A gas mixing assembly includes a mixing housing and a sampling head. The mixing housing is connected to the housing and defines a mixing chamber within the mixing housing. The mixing chamber is located below the combustion chamber and communicates with the combustion assembly via a connecting pipe. A clearance hole is provided on the mounting plate, and the connecting pipe passes through the clearance hole. The clearance hole includes a first clearance hole on the fixed plate and a second clearance hole on the rotating plate. The first clearance hole and the second clearance hole are opposite to and communicate with each other. The sampling head is located on the mixing housing and communicates with the mixing chamber. A gas delivery assembly is connected to the mixing housing and is adapted to deliver sodium-containing gas into the mixing chamber. The gas delivery assembly includes a first gas delivery mechanism and a second gas delivery mechanism, which are disposed within the housing. The first gas delivery mechanism is adapted to deliver sodium-containing gas, and the second gas delivery mechanism is adapted to deliver air. The first gas delivery mechanism includes a first air pump, a first gas delivery pipe, a first connector, and a first flow valve. One end of the first gas delivery pipe is connected to the mixing housing, and the other end of the first gas delivery pipe is connected to the first connector. The first air pump and the first flow valve are both disposed in the first gas delivery pipe. The second gas delivery mechanism includes a second air pump, a second gas delivery pipe, a second connector, and a second flow valve. One end of the second gas delivery pipe is connected to the mixing housing, and the other end of the second gas delivery pipe is connected to the second connector. The second air pump and the second flow valve are both disposed in the second gas delivery pipe.

2. The sodium flame photometer for filters according to claim 1, characterized in that, The combustion assembly includes an igniter and an air intake chamber. The igniter is located above and communicates with the air intake chamber. The air intake chamber is connected to the mixing chamber via a connecting pipe.

3. The sodium flame photometer for filters according to claim 2, characterized in that, The igniter is cylindrical and its central axis extends vertically. The igniter has a venting groove inside, which extends circumferentially along the igniter and runs vertically through the igniter. The lower end of the venting groove is connected to the air intake chamber.

4. The sodium flame photometer for filters according to claim 1, characterized in that, An exhaust pipe is connected to the lower side of the mounting plate. The exhaust pipe extends in the front-to-back direction. One end of the exhaust pipe is connected to the combustion chamber, and an exhaust fan is installed at the other end of the exhaust pipe.

5. The sodium flame photometer for filters according to claim 1, characterized in that, A motor is provided below the rotating plate, and the motor is connected to the rotating plate to drive the rotating plate to rotate relative to the fixed plate; and / or, the length of the second clearance hole along the circumferential direction of the rotating plate is greater than the length of the first clearance hole along the circumferential direction of the rotating plate.

6. The sodium flame photometer for filters according to claim 1, characterized in that, The combustion chamber is provided with an exhaust pipe at the top, which communicates with the combustion chamber. The top of the exhaust pipe is open to form an exhaust port. Multiple guide plates are provided at the exhaust port. The multiple guide plates are arranged at intervals in the front-back direction. In the direction from bottom to top, the guide plates extend backward at an angle.

7. The sodium flame photometer for filters according to claim 1, characterized in that, The housing is provided with an observation window for observing the combustion chamber.

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