Multi-path adjustable gas chamber and gas analyzer

Abstract

The invention discloses a multi-path adjustable gas chamber and a flue gas analyzer, and belongs to the technical field of environment detection, the multi-path adjustable gas chamber comprises a gas chamber cavity, a first reflector and at least one reflector assembly, and the gas chamber cavity is provided with a gas inlet interface and a gas outlet interface; the first reflecting mirror is arranged at the first end of the air chamber cavity, and a light source incident port and a photosensitive receiver interface are formed in the air chamber cavity; the reflector assembly comprises a lens mounting seat and a second reflector, the lens mounting seat is rotatably mounted in a mounting hole preset in the second end of the air chamber cavity, and the second reflector is used for reflecting light introduced by the light source incident port to the first reflector; or the light reflected by the first reflecting mirror is reflected to the first reflecting mirror or the photosensitive receiver interface again at a preset angle. The first reflecting mirror and the reflecting mirror assembly are arranged on the two opposite sides of the gas chamber cavity correspondingly, multiple times of reflection of light is conveniently achieved, finally, the light is received through the light sensing receiver and then analyzed, and the overall structure is more compact and simpler.

Description

Technical Field

[0001] The present application relates to the field of environmental detection technology, and in particular, to a multi-channel adjustable gas chamber. In addition, the present application also relates to a gas analyzer including the multi-channel adjustable gas chamber. Background Art

[0002] The information provided in this section is for the purpose of generally presenting the background of the present application. To the extent described in this section, the work of the presently named inventors and aspects of the description that may not constitute prior art at the time of filing are neither explicitly nor implicitly admitted to be prior art to the present application.

[0003] In the field of gas analysis, the gas substance being measured will have a strong absorption of light of a specific wavelength. By selecting an extended light source with a certain width to illuminate the gas substance, it can be detected that the light intensity in this band will be significantly weakened. The degree of weakening can reflect the concentration distribution of the gas substance being measured. The absorption effect of this gas substance on the energy of light of a specific wavelength satisfies the Lamber-Beer law.

[0004] With the continuous development of gas detection technology, the requirements for detection instruments are becoming increasingly stringent, and miniaturization has become the current development trend. Existing gas absorption cells are usually placed in a relatively small gas chamber. This leads to significant limitations in the design of long optical path absorption cells. This is especially true for monitoring pollutant gases with concentrations in the ppm or even ppb range, which often requires achieving optical path lengths of tens to hundreds of meters within a limited volume.

[0005] In addition, due to the different detection environments, higher requirements are placed on the gas absorption cell. For low-concentration gas detection, the gas cell must be highly sensitive, but also suitable for high-concentration gas detection. This requires the gas cell to be able to adjust the measurement range according to different requirements, so that the gas cell can meet the requirements of different detection sensitivity and range.

[0006] Existing multiple-reflection gas absorption cells generally include a light source, a gas chamber, a reflector, and a light receiver. To meet the optical path required for detection, it is necessary to ensure that the position of the gas absorption cell's optical lenses meets the measurement requirements. That is, multiple reflectors are set inside the gas chamber. The light emitted by the light source is reflected multiple times by the reflectors and finally enters the light receiver through the optical fiber. The detection result is obtained by measuring the intensity change of the spectral absorption peak. Due to the high precision requirements of optical path reflection, if the reflector is made into a fixed structure without the need for angle adjustment, the optical component processing requirements are high and it cannot meet the needs of different optical path usage scenarios. The gas absorption cell with adjustable reflectors is extremely troublesome to assemble and debug. Its performance is very dependent on assembly and optical path adjustment. This assembly and adjustment relies on the experience of the assembler, resulting in extremely high difficulty and time required for assembly. In addition, the combination of multiple subtle manual errors will reduce the repeatability of the optical path.

[0007] In addition, when designing the structure of the multiple-reflection gas absorption cell, it is also necessary to ensure the long-term stability of the position of the optical lens to avoid being affected by environmental conditions such as temperature changes and vibrations, causing deformation that affects the reflection position or angle of the light path, resulting in unstable light path, and then causing large changes in the light intensity signal, resulting in distorted detection results.

[0008] It can be seen that the existing multi-path adjustable gas chamber has technical problems such as a relatively complex overall structure, high difficulty in adjusting the optical path, and a long adjustment time.

[0009] Therefore, it is urgent to provide a multi-way adjustable air chamber that is simple to adjust, has strong resistance to high-temperature deformation, and has a reliable structure. Summary of the Invention

[0010] In view of at least one of the above technical problems, the present application provides a multi-way adjustable air chamber, which can conveniently realize multiple reflections of light by arranging a first reflector and a reflector assembly on opposite sides of the air chamber cavity, and finally receive the light through a photosensitive receiver for analysis, making the overall structure more compact and streamlined.

[0011] At the same time, the present application also provides a gas analyzer including the above-mentioned multi-channel adjustable gas chamber.

[0012] According to one aspect of the present application, a multi-way adjustable gas chamber is provided, comprising a gas chamber cavity, a first reflector, and at least one reflector assembly:

[0013] The air chamber cavity is provided with an air inlet interface and an air outlet interface. The air inlet interface is used to introduce the sample gas to be tested into the air chamber cavity, and the air outlet interface is used to discharge the sample gas to be tested in the air chamber cavity;

[0014] The first reflector is arranged at the first end of the air chamber cavity, and the air chamber cavity is provided with a light source incident port and a light receiving interface;

[0015] The reflector assembly includes a lens mount and a second reflector. The lens mount can be rotatably mounted in a mounting hole preset at the second end of the air chamber cavity. The lens mount is provided with a mounting groove at the first end facing the air chamber cavity. The second reflector is arranged in the mounting groove. The outer periphery of the lens mount is provided with an arc surface assembly structure adapted to the mounting hole. The second reflector is used to reflect the light introduced from the light source inlet to the first reflector, or to reflect the light reflected back by the first reflector back to the first reflector or the photosensitive receiver interface at a preset angle.

[0016] In some embodiments of the present application, multiple reflector assemblies are arranged at intervals, and multiple mounting holes are provided at the second end of the air chamber cavity. The lens mounting seats of the multiple reflector assemblies are installed in the multiple mounting holes one by one. The multiple reflector assemblies are used to cooperate with the first reflector to perform multiple reciprocating reflections on the light in the air chamber cavity, so that the light introduced from the light source inlet is emitted along the photosensitive receiver interface after multiple reciprocating reflections.

[0017] In some embodiments of the present application, the reflector assembly also includes a lens fixing member, a third seal and a sealing protection ring. The lens fixing member is used to limit and fix the second reflector in the mounting groove, and the lens fixing member is provided with an avoidance hole for light to be irradiated onto the second reflector. The third seal is arranged in the mounting groove of the lens mounting seat. The third seal is located between the second reflector and the lens fixing member. The third seal is used to seal the four sides of the second reflector. The sealing protection ring is arranged between the lens fixing member and the third seal. The sealing protection ring is used to compress and shield the third seal.

[0018] In some embodiments of the present application, the reflector assembly also includes a fastener and an adjusting member. The adjusting member is arranged at one end of the lens mounting seat away from the air chamber cavity. The adjusting member is used to drive the lens mounting seat to rotate to adjust the angle of the second reflector. The fastener is connected to the second end of the air chamber cavity. The fastener is used to press the reflector assembly into the mounting hole. A limiting through hole is provided on the fastener, and the adjusting member passes through the limiting through hole to the side of the fastener away from the air chamber cavity.

[0019] In some embodiments of the present application, a plurality of locking screw holes are provided on the fastener next to the limiting through hole, and the locking screw holes are used to set a first locking member, which is used to pass through the locking screw holes and tighten the second end of the lens mounting seat.

[0020] In some embodiments of the present application, a limiting screw hole is opened on the top wall and / or bottom plate of the air chamber cavity, and the limiting screw hole is used to set a second locking member, which is used to pass through the limiting screw hole and tighten the side wall of the lens mounting seat.

[0021] In some embodiments of the present application, the reflector assembly also includes a second seal, a circle of sealing grooves is opened on the side wall of the lens mount, the second seal is installed on the sealing groove and elastically abuts against the mounting hole, and the axis of the second seal is located on the spherical center of the lens mount.

[0022] In some embodiments of the present application, the multi-way adjustable air chamber also includes a cover plate, and a first inspection hole and a second inspection hole are respectively opened on opposite sides of the top of the air chamber cavity. Cover plates are provided in the first inspection hole and the second inspection hole, and an air inlet interface is provided on one of the cover plates, and an air outlet interface is provided on the other cover plate.

[0023] In some embodiments of the present application, the multi-way adjustable air chamber also includes a positioning tool, the positioning tool includes a tool body, the side wall of the tool body is provided with at least one adjustment block, the adjustment block is provided with an optical path through hole, the positioning tool is installed in the first inspection hole, and is used to position the angle adjustment of the second reflector through the optical path through hole after removing the cover plate.

[0024] According to another aspect of the present application, a gas analyzer is provided, which includes the above-mentioned multi-channel adjustable gas chamber.

[0025] This application has the following beneficial effects:

[0026] The multi-path adjustable air chamber of the present application is provided with a first reflector at the first end of the air chamber cavity, and a light source incident port and a photosensitive receiver interface are provided on the air chamber cavity, and a reflector assembly is provided at the second end of the air chamber cavity. Light is introduced into the air chamber cavity through the light source incident port, and is reflected multiple times between the reflector assembly and the first reflector, thus forming a reciprocating light path, which is finally reflected to the photosensitive receiver at the photosensitive receiver interface, and then the detection result is obtained by analyzing the intensity change of the spectral absorption peak. The periphery of the lens mounting seat of the reflector assembly is provided with an arc surface assembly structure adapted to the mounting hole of the air chamber cavity, which is used to rotate and adjust the angle relative to the mounting hole, so that the lens mounting seat can be flexibly adjusted in angle to meet the needs of different usage scenarios. The overall structure of the present application is very streamlined and efficient, the angle adjustment of the reflector assembly is very convenient, and the optical path required for detection can be stably achieved. The structure has high strength and good shock resistance, and can effectively deal with external interference, ensure the accuracy of detection and improve the efficiency of detection.

[0027] The gas analyzer of the present application also has the above-mentioned beneficial effects, and also has the advantages of being simple and reliable in structure, high in overall strength, and low in manufacturing and maintenance costs.

[0028] Of course, any product implementing this application does not necessarily need to achieve all of the advantages described above. In addition to the purposes, features, and advantages described above, this application also has other purposes, features, and advantages. This application will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of this application. The exemplary embodiments and descriptions of this application are intended to explain this application and do not constitute an improper limitation on this application. In the accompanying drawings:

[0030] Figure 1 It is a schematic diagram of the overall structure of the preferred embodiment of the present application;

[0031] Figure 2 This is an exploded view of the overall structure of the multi-way adjustable air chamber of the preferred embodiment of the present application;

[0032] Figure 3 Schematic diagram of the light path in the air chamber cavity of the preferred embodiment of the present application, wherein the solid line with an arrow is used to represent the light propagation path;

[0033] Figure 4 Schematic diagram of the installation of the first reflector in the preferred embodiment of the present application;

[0034] Figure 5 1 is a schematic diagram of the installation of a reflector assembly according to a preferred embodiment of the present application;

[0035] Figure 6 is a structural schematic diagram of a reflector assembly according to a preferred embodiment of the present application;

[0036] Figure 7 Schematic diagram of the installation of the second reflector in the preferred embodiment of the present application;

[0037] Figure 8 Schematic diagram of adjusting the angle of the reflector assembly in a preferred embodiment of the present application;

[0038] Figure 9 This is a schematic structural diagram of a positioning tool according to a preferred embodiment of the present application;

[0039] Figure 10 Schematic diagram of the installation position of the first locking member in the preferred embodiment of the present application;

[0040] Figure 11 This is a schematic diagram of the position of the limiting screw holes in the preferred embodiment of the present application;

[0041] Figure 12 This is a schematic diagram of the installation of the second locking member of the preferred embodiment of the present application.

[0042] Legend: 1. Air chamber cavity; 2. Light source transmitting and receiving seat; 21. Light source incident port; 22. Photosensitive receiver interface; 3. Fastener; 4. Cover plate; 41. Air inlet interface; 42. Air outlet interface; 5. First gasket; 6. First seal; 7. First reflector; 8. Second gasket; 9. Pressing member; 10. Reflector assembly; 101. Lens mounting seat; 1011. Adjusting screw hole; 102. Second seal; 103. Second reflector; 104. Third seal; 105. Sealing protection ring; 106. Lens fixing member; 11. Buffer pad; 12. First locking member; 13. Adjusting member; 14. Second locking member; 15. Limiting screw hole; 16. Positioning tooling; 161. Adjusting block; 162. Optical path through hole; 17. First inspection hole; 18. Second inspection hole. DETAILED DESCRIPTION

[0043] The embodiments of the present application are described in detail below with reference to the accompanying drawings, but the present application can be implemented in a variety of different ways defined and covered below.

[0044] Figure 1 It is a schematic diagram of the overall structure of the preferred embodiment of the present application; Figure 2 This is an exploded view of the overall structure of the multi-way adjustable air chamber of the preferred embodiment of the present application; Figure 3 This is a schematic diagram of the light path in the air chamber cavity of the preferred embodiment of the present application; Figure 4 Schematic diagram of the installation of the first reflector in the preferred embodiment of the present application; Figure 5 1 is a schematic diagram of the installation of a reflector assembly according to a preferred embodiment of the present application; Figure 6 is a structural schematic diagram of a reflector assembly according to a preferred embodiment of the present application; Figure 7 Schematic diagram of the installation of the second reflector in the preferred embodiment of the present application; Figure 8 Schematic diagram of adjusting the angle of the reflector assembly in a preferred embodiment of the present application; Figure 9 This is a schematic structural diagram of a positioning tool according to a preferred embodiment of the present application; Figure 10 Schematic diagram of the installation position of the first locking member in the preferred embodiment of the present application; Figure 11 This is a schematic diagram of the position of the limiting screw holes in the preferred embodiment of the present application; Figure 12 This is a schematic diagram of the installation of the second locking member of the preferred embodiment of the present application.

[0045] A multi-way adjustable air chamber, comprising an air chamber cavity 1, a first reflector 7 and at least one reflector assembly 10:

[0046] The air chamber cavity 1 is provided with an air inlet interface 41 and an air outlet interface 42. The air inlet interface 41 is used to introduce the sample gas to be tested into the air chamber cavity 1, and the air outlet interface 42 is used to discharge the sample gas to be tested in the air chamber cavity 1;

[0047] The first reflector 7 is provided at the first end of the air chamber cavity 1, and the air chamber cavity 1 is provided with a light source incident port 21 and a light receiving interface 22;

[0048] The reflector assembly 10 includes a lens mount 101 and a second reflector 103. The lens mount 101 can be rotatably mounted in a preset mounting hole at the second end of the air chamber cavity 1. The lens mount 101 is provided with a mounting groove at the first end facing the air chamber cavity 1. The second reflector 103 is arranged in the mounting groove. The outer periphery of the lens mount 101 is provided with a curved surface assembly structure adapted to the mounting hole. The second reflector 103 is used to reflect the light introduced by the light source incident port 21 to the first reflector 7, or to reflect the light reflected back by the first reflector 7 at a preset angle to the first reflector 7 or the photosensitive receiver interface 22.

[0049] The meaning of "air chamber cavity 1" here refers to a structure for accommodating the sample gas to be tested through a closed cavity, and connecting a light source to illuminate the sample gas to be tested. In some embodiments, the air chamber cavity 1 is a frame structure with a hollow cavity opened inside. Among them, the air inlet interface 41 and the air outlet interface 42 provided on the air chamber cavity 1 are preferably located at opposite corners on both sides of the air chamber cavity 1, so that the sample gas to be tested can form a diagonal convection in and out, ensuring that the sample gas is fully circulated inside the air chamber cavity 1, effectively avoiding the occurrence of dead volume, and helping to ensure the accuracy and stability of the detection. Of course, in other embodiments, the air inlet interface 41 and the air outlet interface 42 can also be provided at one end of the air chamber cavity 1, so as to realize the entry and exit of the gas to be tested. In addition, the light source incident port 21 and the photosensitive receiver interface 22 are provided on the same side or opposite sides of the air chamber cavity 1, and can be flexibly arranged according to the situation.

[0050] Optionally, a light source transmitting and receiving seat 2 is further provided at the first end of the air chamber cavity 1 .

[0051] The "light source transmitting and receiving seat 2" here refers to the structure connected to the first end of the air chamber cavity 1. In some embodiments, the light source transmitting and receiving seat 2 is a plate-like structure, and the contact surface between the light source transmitting and receiving seat 2 and the air chamber cavity 1 is sealed to prevent leakage of the sample gas to be tested in the air chamber cavity 1.

[0052] In some embodiments, the first reflector 7 is mounted on the light source transmitting and receiving seat 2, and the light source incident port 21 and the photosensitive receiver interface 22 are respectively arranged on opposite sides of the first reflector 7. This arrangement not only facilitates the rapid installation of the first reflector 7, the light source incident port 21 and the photosensitive receiver interface 22, but also makes the structure of the multi-way adjustable air chamber more compact.

[0053] The meaning of "lens mount 101" here refers to the structure for mounting the second reflector 103. In some embodiments, the lens mount 101 includes a spherical body that is cut on all sides. The spherical surface retained after cutting can be rotatably abutted against the mounting hole of the air chamber cavity 1, and the mounting hole is preferably a cylindrical structure. In other embodiments, the lens mount 101 includes a spherical body, and the mounting hole can be designed to be cylindrical or circular accordingly. The lens mount 101 of the present application has a simpler structure, which is conducive to the miniaturization of the air chamber. The distance between the second reflector 103 and the adjusting member 13 is shorter, which is easier to adjust. That is, when adjusting the same reflector angle, the rotation displacement of the lens mount 101 is smaller, which can not only effectively improve the adjustment efficiency, but also be more conducive to sealing, that is, the deformation of the sealing member is smaller.

[0054] It should be noted that the photosensitive receiver interface 22 is used to set up a photosensitive receiver, which includes an optical fiber and a light receiver. After multiple reflections, the light finally enters the receiver through the optical fiber, and the concentration of the substance to be measured in the sample gas can be obtained by analyzing the intensity change of the spectral absorption peak.

[0055] The multi-channel adjustable gas chamber also includes a heating and constant temperature component, which includes a temperature sensor, a heating plate or a heating wire. In some embodiments, the heating and constant temperature component is arranged at the bottom of the gas chamber cavity 1, and can comprehensively heat and maintain a constant temperature for the sample gas to be tested in the gas chamber cavity 1.

[0056] The multi-path adjustable air chamber of the present application is provided with a first reflector 7 at the first end of the air chamber cavity 1, and a light source incident port 21 and a photosensitive receiver interface 22 are provided on the air chamber cavity 1, and a reflector assembly 10 is provided at the second end of the air chamber cavity 1. Light is introduced into the air chamber cavity through the light source incident port 21, and is reflected multiple times between the reflector assembly 10 and the first reflector 7, thus forming a reciprocating light path, which is finally reflected to the photosensitive receiver at the photosensitive receiver interface 22. The detection result is then obtained by analyzing the intensity change of the spectral absorption peak. The outer periphery of the lens mounting seat 101 of the reflector assembly 10 is provided with a curved surface assembly structure that is compatible with the mounting hole of the air chamber cavity 1, which is used to rotate and adjust the angle relative to the mounting hole, so that the lens mounting seat 101 can be flexibly adjusted in angle to meet the needs of different usage scenarios. The overall structure of the present application is very streamlined and efficient, the angle adjustment of the reflector assembly 10 is very convenient, and the optical path required for detection can be stably achieved. The structure has high strength and good shock resistance, and can effectively cope with external interference, ensuring the accuracy of detection and improving the efficiency of detection.

[0057] Preferably, please refer to Figure 2 and Figure 3 As shown, multiple reflector assemblies 10 are arranged at intervals, and the second end of the air chamber cavity 1 is provided with multiple mounting holes. The lens mounting seats 101 of the multiple reflector assemblies 10 are installed in the multiple mounting holes one by one. The multiple reflector assemblies 10 are used to cooperate with the first reflector 7 to perform multiple reciprocating reflections on the light in the air chamber cavity 1, so that the light introduced from the light source inlet 21 is emitted along the photosensitive receiver interface 22 after multiple reciprocating reflections.

[0058] It can be understood that there are multiple reflector assemblies 10 arranged at lateral intervals along the air chamber cavity 1, and the angle of each reflector assembly 10 is adjustable. Multiple reflector assemblies 10 can be used in conjunction with the first reflector 7 to perform multiple reflections to form a reciprocating light path, which is finally reflected to the photosensitive receiver, thereby effectively extending the optical path of the air chamber, meeting the requirements for the optical path during detection, and enabling the reflector assembly 10 to cope with the needs of a wider range of detection conditions.

[0059] It should be noted that the first reflector 7 is a plane mirror structure, which is combined with multiple reflector assemblies 10 arranged opposite to the first reflector 7. By adjusting the angles of each reflector assembly 10, the light reflected by the first reflector 7 can be continuously reflected through multiple reflector assemblies 10 to form a broken line light path.

[0060] Preferably, please refer to Figure 2 、 5 As shown in Figures 6, 7 and 8, the reflector assembly 10 also includes a lens fixing member 106, a third sealing member 104 and a sealing protection ring 105. The lens fixing member 106 is used to limit and fix the second reflector 103 in the mounting groove, and the lens fixing member 106 is provided with an avoidance through hole for light to irradiate the second reflector 103. The third sealing member 104 is arranged in the mounting groove of the lens mounting seat 101. The third sealing member 104 is located between the second reflector 103 and the lens fixing member 106. The third sealing member 104 is used to seal the four sides of the second reflector 103. The sealing protection ring 105 is arranged between the lens fixing member 106 and the third sealing member 104. The sealing protection ring 105 is used to compress and shield the third sealing member 104.

[0061] It can be understood that the second reflector 103 is pressed and limited in the installation groove by the lens fixing part 106 to achieve stable installation, and the lens mounting seat 101 is set in a preset installation through hole on the side wall of the second end of the air chamber cavity 1, and the lens mounting seat 101 can adjust the angle of the lens mounting seat 101 by adjusting the adjusting part 13, thereby realizing the adjustment of the angle of the second reflector 103. The adjustment is very intuitive and quick, and can effectively meet the requirements of different working conditions.

[0062] Furthermore, the reflector assembly 10 also includes a third seal 104, which is arranged in the mounting groove of the lens mounting seat 101 and is located between the second reflector 103 and the lens fixing member 106. The third seal 104 is used to seal the four sides of the second reflector 103 to protect the lens coating of the second reflector 103 from corrosion.

[0063] Furthermore, the reflector assembly 10 also includes a sealing protection ring 105, which is arranged between the lens fixing member 106 and the third sealing member 104. In order to prevent the lens fixing member 106 from rotating and driving the third sealing member 104 to rotate and damage the third sealing member 104, the sealing protection ring 105 is used to press the third sealing member 104, thereby protecting the third sealing member 104 and further protecting the sealing of the second reflector 103.

[0064] In this preferred embodiment, the second reflector 103 is a plane mirror. The lens holder 106 is threadedly connected to the mounting groove of the lens mount 101, which facilitates the assembly and disassembly of the second reflector 103. The lens holder 106 has a through hole to allow light to pass smoothly through and illuminate the second reflector 103. In addition, the second end of the lens mount 101 has an adjustment screw hole 1011, which is threadedly connected to the adjustment member 13, facilitating the assembly and disassembly of the adjustment member 13.

[0065] Preferably, please refer to Figure 1 、 2 5, the reflector assembly 10 also includes a fastener 3 and an adjusting member 13. The adjusting member 13 is arranged at one end of the lens mounting seat 101 away from the air chamber cavity 1. The adjusting member 13 is used to drive the lens mounting seat 101 to rotate to adjust the angle of the second reflector 103. The fastener 3 is connected to the second end of the air chamber cavity 1. The fastener 3 is used to press the reflector assembly 10 to limit it in the mounting hole. A limiting through hole is provided on the fastener 3. The adjusting member 13 passes through the limiting through hole to the side of the fastener 3 away from the air chamber cavity 1.

[0066] It can be understood that by arranging a fastener 3 at the second end of the air chamber cavity 1, multiple reflector assemblies 10 can be compressed and limited at one time, thereby strengthening the limitation of the reflector assembly 10, thereby improving the installation stability and reliability of the reflector assembly 10 and the convenience of disassembling and assembling the reflector assembly 10.

[0067] In this preferred embodiment, the fastener 3 includes a plate-like structure, and the fastener 3 can act as a limiting plate. A plurality of locking screw holes are provided on the fastener 3 next to the limiting through hole. The locking screw holes are used to set the first locking member 12, and the first locking member 12 is used to tighten the second end of the lens mounting seat 101 after passing through the locking screw hole.

[0068] It can be understood that the first locking piece 12 is threadedly connected to the locking screw hole, which can facilitate the disassembly and assembly and position adjustment of the first locking piece 12. By pressing the second end of the lens mounting seat 101 with the first locking piece 12, the lens mounting seat 101 can be further stably pressed and limited to the preset mounting through hole on the side wall of the air chamber cavity 1, so as to strengthen the limitation of each lens mounting seat 101 after the position is adjusted to ensure the stability of the angle of the second reflector 103.

[0069] Preferably, please refer to Figure 5 、 11 As shown in Figures 12, a limiting screw hole 15 is provided on the top wall and / or bottom plate of the air chamber cavity 1. The limiting screw hole 15 is used to set a second locking member 14. The second locking member 14 is used to pass through the limiting screw hole 15 and then tighten the side wall of the lens mounting seat 101.

[0070] It can be understood that the second locking member 14 on the top wall and bottom plate of the air chamber cavity 1 can strengthen the limitation of the side wall of the lens mount 101 in the upper and lower directions, and cooperate with the second locking member 14 to further improve the limiting stability of the lens mount 101, ensure the position stability of the lens mount 101 after adjusting the angle, effectively improve the shock resistance of the adjustable angle reflector assembly 10, and avoid the reflected light path from easily deviating and causing distortion of the detection results.

[0071] In this preferred embodiment, the limiting screw holes 15 on the top wall and the bottom plate of the air chamber cavity 1 can be spaced apart and staggered, and when installing the second locking member 14, the second locking member 14 can be locked in diagonally in sequence, and the optical path of the reflector assembly 10 can be fine-tuned to the optimal state. The lens mounting seat 101 can be firmly pressed and limited from multiple directions through the first locking member 12 and the second locking member 14.

[0072] Optionally, the first locking member 12 and the second locking member 14 are both screws or bolts. Using standard parts can reduce procurement costs and facilitate subsequent maintenance and replacement.

[0073] Preferably, please refer to Figure 6 、 7 As shown in Figures 8 and 8, the reflector assembly 10 also includes a second seal 102. A circle of sealing grooves is provided on the side wall of the lens mounting seat 101. The second seal 102 is installed on the sealing groove and elastically abuts against the mounting hole. The axis of the second seal 102 is located on the spherical center of the lens mounting seat 101.

[0074] It can be understood that while the first locking member 12 and the second locking member 14 firmly press and limit the lens mount 101 from multiple directions, the second sealing member 102 can also strengthen the sealing of the sealing surface between the side wall of the lens mount 101 and the inner wall of the mounting hole on the side wall of the air chamber cavity 1. In some embodiments, the first end and the second end of the lens mount 101 are both spherical structures. When the adjusting member 13 drives the lens mount 101 to rotate and adjust the angle, the deformation of the second sealing member 102 assists in fine-tuning the position of the lens mount 101, and the sealing effect around the side wall of the lens mount 101 is maintained at all times. The axis of the second sealing member 102 is located on the spherical center of the lens mounting seat 101. When the angle of the second reflector 103 needs to be adjusted, the rotation displacement of the lens mounting seat 101 is small. During the rotation of the lens mounting seat 101, the axis of the second sealing member 102 and the spherical center of the lens mounting seat 101 always coincide with each other, thereby minimizing the deformation of the second sealing member 102 and ensuring the sealing of the second sealing member 102 and the air chamber cavity 1.

[0075] Optionally, the reflector assembly 10 further includes a buffer pad 11, which is disposed between the fastener 3 and the lens mount 101. The buffer pad 11 is used to cushion the abutment and compression of the fastener 3 and the lens mount 101, thereby providing a pre-compression function and reducing damage caused by collisions between the fastener 3 and the lens mount 101. The buffer pad 11 can be made of PTFE material, and the lens mount 101 can still rotate after installation and compression.

[0076] It should be noted that multiple buffering and sealing effects are achieved through the second sealing member 102 and the buffer pad 11, and the angle of the lens mounting seat 101 is adjusted by the adjusting member 13, and the angles of the multiple reflector assemblies 10 are gradually adjusted until the optical path in the air chamber cavity is adjusted to the required optical path.

[0077] Preferably, please refer to Figure 2 、 4 As shown, a lens mounting groove is provided on the side of the light source transmitting and receiving seat 2 facing the air chamber cavity 1, and the lens mounting groove is used to limit the first reflector 7. The multi-way adjustable air chamber also includes a second gasket 8 and a pressing member 9. The pressing member 9 is connected to the light source transmitting and receiving seat 2, and the pressing member 9 is used to press the first reflector 7 to the side wall of the light source transmitting and receiving seat 2. The second gasket 8 is arranged between the pressing member 9 and the light source transmitting and receiving seat 2, and the second gasket 8 is used to seal the first reflector 7 on all sides.

[0078] It can be understood that the first reflector 7 can be stably pressed and limited and installed on the light source transmitting and receiving seat 2 by the clamping piece 9 and the second gasket 8. At the same time, the first reflector 7 is sealed and protected on all sides by the second gasket 8 to isolate the gas in the air chamber cavity 1, protect the lens coating, and avoid lens corrosion.

[0079] It should be noted that both the pressing member 9 and the second gasket 8 are provided with through holes to ensure that light can be smoothly irradiated onto the first reflector 7. The pressing member 9 can be connected to the light source transmitting and receiving seat 2 by bolts, which facilitates the disassembly and maintenance of the first reflector 7.

[0080] Optionally, an annular retaining groove is defined on the side of the light source transmitting and receiving seat 2 facing the interior of the air chamber cavity 1. This groove is used to accommodate a first seal 6, which is used to reinforce the sealing surface between the light source transmitting and receiving seat 2 and the end face of the air chamber cavity 1. A second gasket 8 is also located between the first seal 6 and the first reflector 7, and can cooperate with the first seal 6 to enhance the sealing and buffering protection of the first reflector 7, and improve the seismic resistance and high-temperature deformation resistance of the mounting structure of the first reflector 7.

[0081] Preferably, please refer to Figure 1 and 2 As shown, the multi-way adjustable air chamber also includes a cover plate 4, and a first inspection hole 17 and a second inspection hole 18 are respectively opened on opposite sides of the top of the air chamber cavity 1, and a cover plate 4 is provided in the first inspection hole 17 and the second inspection hole 18, wherein an air inlet interface 41 is provided on one of the cover plates 4, and an air outlet interface 42 is provided on the other cover plate 4.

[0082] It can be understood that by opening a first inspection hole 17 and a second inspection hole 18 on opposite sides of the top of the air chamber cavity 1, the first inspection hole 17 and the second inspection hole 18 can be used as a lens maintenance channel to facilitate the maintenance and cleaning of the lens. Due to air circulation, slight dust can easily adhere to the lens, so it is necessary to clean and maintain it in time, and the first inspection hole 17 and the second inspection hole 18 are shielded and sealed by the cover plate 4 to prevent the gas to be measured from leaking.

[0083] In this preferred embodiment, a first gasket 5 is provided between the cover plate 4 and the air chamber cavity 1 , and the first gasket 5 has a reinforcing sealing effect on the connection between the cover plate 4 and the air chamber cavity 1 .

[0084] It should be noted that during installation, the cover plate 4 and the first gasket 5 can be unlocked first. After adjusting the optical path to the optimal state, the cover plate 4 and the first gasket 5 can be locked to ensure the sealing of the air chamber 1. When the lens needs to be maintained, only the cover plate 4 and the first gasket 5 need to be removed for quick maintenance.

[0085] Preferably, please refer to Figure 9 As shown, the multi-way adjustable air chamber also includes a positioning tool 16, which includes a tool body. The side wall of the tool body is provided with at least one adjustment block 161, and the adjustment block 161 is provided with an optical path through hole 162. The positioning tool 16 is installed in the first inspection hole 17, and is used to position the angle adjustment of the second reflector 103 through the optical path through hole 162 after removing the cover plate 4.

[0086] It can be understood that by setting a positioning tool 16 in the air chamber cavity 1 and utilizing the optical path through hole 162 pre-opened on the positioning tool 16 to guide the optical path, it is beneficial to quickly adjust the optical path to the optimal position through the reflector assembly 10, effectively shortening the optical path adjustment time.

[0087] It should be noted that a plurality of light path through holes 162 may be provided to position the multiply reflected light and assist in adjusting the light path.

[0088] Among them, the positioning tool 16 is set on a side close to the fixed first reflector 7. If the first reflector 7 is replaced by a reflector assembly (10) with adjustable angle, the positioning tool 16 is used to be installed in the first inspection hole 17 and / or the second inspection hole 18 after the cover plate 4 is removed and to position the angle adjustment of the second reflector 103 through the optical path through hole 162, so as to achieve accurate and rapid adjustment of the optical path.

[0089] According to another aspect of the present application, a gas analyzer is provided, which includes the above-mentioned multi-channel adjustable gas chamber.

[0090] The gas analyzer of the present application also has the above-mentioned beneficial effects, including simple and short optical path adjustment time, strong shock resistance and high temperature deformation resistance of the entire device after locking, simple and reliable structure, high overall strength, and low manufacturing and maintenance costs.

[0091] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0092] This article uses specific examples to illustrate the principles and implementation methods of this application. The above examples are only used to help understand the method and core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of this application, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as protected by this application.

Claims

1. A multi-way adjustable air chamber, characterized in that: The invention comprises an air chamber cavity (1), a first reflector (7) and at least one reflector assembly (10): The air chamber cavity (1) is provided with an air inlet interface (41) and an air outlet interface (42), wherein the air inlet interface (41) is used to introduce the sample gas to be tested into the air chamber cavity (1), and the air outlet interface (42) is used to discharge the sample gas to be tested in the air chamber cavity (1); The first reflector (7) is arranged at the first end of the air chamber cavity (1), and the air chamber cavity (1) is provided with a light source incident port (21) and a light-sensitive receiver interface (22); The reflector assembly (10) comprises a lens mounting seat (101) and a second reflector (103). The lens mounting seat (101) is rotatably mounted in a mounting hole preset at the second end of the air chamber cavity (1). The lens mounting seat (101) is provided with a mounting groove at the first end facing the air chamber cavity (1). The second reflector (103) is arranged in the mounting groove. The outer periphery of the lens mounting seat (101) is provided with an arc surface assembly structure adapted to the mounting hole. The second reflector (103) is used to reflect light introduced from the light source incident port (21) onto the first reflector (7), or to reflect light reflected back by the first reflector (7) back to the first reflector (7) or a light-sensitive receiver interface (22) at a preset angle.

2. A multi-way adjustable air chamber according to claim 1, characterized in that: A plurality of reflector assemblies (10) are arranged at intervals, a plurality of mounting holes are provided at the second end of the air chamber cavity (1), and the lens mounting seats (101) of the plurality of reflector assemblies (10) are mounted in the plurality of mounting holes in a one-to-one correspondence. The plurality of reflector assemblies (10) are used to cooperate with the first reflector (7) to perform multiple reciprocating reflections on the light in the air chamber cavity (1), so that the light introduced from the light source incident port (21) is emitted along the photosensitive receiver interface (22) after multiple reciprocating reflections.

3. A multi-way adjustable gas chamber according to claim 1 or 2, characterized in that: The reflector assembly (10) further comprises a lens fixing member (106), a third sealing member (104) and a sealing protection ring (105). The lens fixing member (106) is used to limit and fix the second reflector (103) in the mounting groove, and the lens fixing member (106) is provided with an avoidance through hole for light to irradiate the second reflector (103). The third sealing member (104) is arranged in the mounting groove of the lens mounting seat (101). The third sealing member (104) is located between the second reflector (103) and the lens fixing member (106). The third sealing member (104) is used to seal the periphery of the second reflector (103). The sealing protection ring (105) is arranged between the lens fixing member (106) and the third sealing member (104). The sealing protection ring (105) is used to compress and shield the third sealing member (104).

4. A multi-way adjustable air chamber according to claim 1 or 2, characterized in that: The reflector assembly (10) further comprises a fastener (3) and an adjusting member (13). The adjusting member (13) is arranged at one end of the lens mounting seat (101) away from the air chamber cavity (1). The adjusting member (13) is used to drive the lens mounting seat (101) to rotate so as to adjust the angle of the second reflector (103). The fastener (3) is connected to the second end of the air chamber cavity (1). The fastener (3) is used to press the reflector assembly (10) to limit its position in the mounting hole. A limiting through hole is provided on the fastener (3). The adjusting member (13) passes through the limiting through hole to the side of the fastener (3) away from the air chamber cavity (1).

5. The multi-way adjustable air chamber according to claim 4, characterized in that: A plurality of locking screw holes are provided on the fastener (3) adjacent to the limiting through hole. The locking screw holes are used to set a first locking member (12). The first locking member (12) is used to pass through the locking screw holes and tighten the second end of the lens mounting seat (101).

6. The multi-way adjustable air chamber according to claim 1, characterized in that: A limiting screw hole (15) is provided on the top wall and / or bottom plate of the air chamber cavity (1), the limiting screw hole (15) is used to set a second locking member (14), and the second locking member (14) is used to pass through the limiting screw hole (15) and then tighten the side wall of the lens mounting seat (101).

7. The multi-way adjustable air chamber according to claim 1, characterized in that: The reflector assembly (10) further comprises a second sealing member (102). A sealing groove is provided on the side wall of the lens mounting seat (101). The second sealing member (102) is mounted on the sealing groove and elastically abuts against the mounting hole. The axis of the second sealing member (102) is located on the spherical center of the lens mounting seat (101).

8. The multi-way adjustable air chamber according to claim 1, characterized in that: The multi-way adjustable air chamber further comprises a cover plate (4), a first inspection hole (17) and a second inspection hole (18) are respectively provided on opposite sides of the top of the air chamber cavity (1), and the first inspection hole (17) and the second inspection hole (18) are both provided with a cover plate (4), one of the cover plates (4) is provided with an air inlet interface (41), and the other cover plate (4) is provided with an air outlet interface (42).

9. The multi-way adjustable air chamber according to claim 8, characterized in that: The multi-path adjustable air chamber further comprises a positioning tool (16), the positioning tool (16) comprising a tool body, a side wall of the tool body being provided with at least one adjustment block (161), an optical path through hole (162) being provided on the adjustment block (161), and the positioning tool (16) being installed in the first inspection hole (17) and used for adjusting the angle of the second reflector (103) for positioning through the optical path through hole (162) after the cover plate (4) is removed.

10. A gas analyzer, characterized in that: It comprises a multi-way adjustable gas chamber as described in any one of claims 1-9.

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