A high-precision laser gas analyzer
By introducing transition pipes, waterproof and breathable membranes, gas pumping components, and a constant temperature module into the laser gas analyzer, the requirement for pure and constant temperature in gas detection is solved, and high-precision gas analysis is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUOKE HANHAI LASER TECH (BEIJING) CO LTD
- Filing Date
- 2025-06-27
- Publication Date
- 2026-07-17
AI Technical Summary
Existing laser gas analyzers have high requirements for external gases, requiring pure, anhydrous, and constant-temperature gases for detection. Temperature changes affect the detection results, resulting in low detection accuracy.
A high-precision laser gas analyzer was designed, comprising a transition pipe, a waterproof and breathable membrane, a pumping assembly, a constant temperature module, and an absorption cell. The transition pipe and the waterproof and breathable membrane filter the air, the pumping assembly circulates the air, and the constant temperature module maintains a constant temperature inside the absorption cell, ensuring the purity and temperature stability of the detected gas.
It achieves high-precision processing of the air to be tested, ensuring the purity and temperature stability of the gas, and improving the detection accuracy.
Smart Images
Figure CN224518530U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of analyzer technology, specifically a high-precision laser gas analyzer. Background Technology
[0002] Existing precision gas analyzers typically consist of four parts: a semiconductor laser emitting module, a receiving module, a communication module, and an absorption cell. During operation, the semiconductor laser emitting module emits a laser beam that enters the absorption cell via optical fiber. External gas also enters the absorption cell via a suction pump. The analyzer then utilizes the principle that the gas being measured absorbs a specific wavelength of laser light. The receiving module performs photoelectric conversion on the laser signal contacting the gas and calculates the gas concentration. The communication module then uploads the concentration value to a host computer or central control platform. Furthermore, the analyzer allows selection of the specific wavelength of laser light absorbed by the gas being measured, and the single-mode nature of the laser radiation wavelength avoids cross-interference from other gas components (with different absorption wavelengths), thus providing excellent fingerprinting capabilities.
[0003] However, existing laser gas analyzers have high requirements for the external gas. They need to be pure, free of moisture, and have minimal interference. In addition, they need to be at a constant temperature (dry and constant-temperature gas is required for detection to achieve high accuracy). This is because the laser sensor is very sensitive to temperature, and temperature changes affect the detection results. Therefore, a module that can both filter the air and regulate the air temperature is needed to pre-treat the air to meet the detection requirements. Therefore, the applicant wants to provide a high-precision laser gas analyzer to solve the problems existing in the current technology. Utility Model Content
[0004] This invention provides a high-precision laser gas analyzer that solves the problems mentioned in the background section.
[0005] This utility model provides the following technical solution: a high-precision laser gas analyzer, including a housing and a detection structure fitted inside the housing. Transition pipes are fitted at both the front and rear ends of one side of the housing, and filter components are installed inside the transition pipes. An inner support frame, a pumping assembly, and an absorption tank are fitted inside the housing. The absorption tank and the pumping assembly are respectively installed at the top and bottom of the inner support frame. The detection structure is installed at the top of the inner support frame and can detect the air inside the absorption tank. A constant temperature module is installed on the surface of the absorption tank.
[0006] The surface of the absorption tank is provided with an outlet connector and an inlet connector. The input structure of the pumping assembly is connected to one of the transition pipes, and the output structure of the pumping assembly is connected to the inlet connector. An outlet pipe is installed between the outlet connector and the other transition pipe. The pumping assembly can circulate and pump air in the absorption tank through the two transition pipes, the outlet connector, and the inlet connector.
[0007] Preferably, the detection structure includes a semiconductor laser emitting module, a receiving module, and a communication module, and the semiconductor laser emitting module can guide laser light into the absorption cell through an optical fiber to perform laser detection on the air inside the absorption cell.
[0008] Preferably, the transition pipe includes a main internal threaded pipe, the middle part of which is fitted inside the corresponding side wall of the outer protective shell. The filter assembly includes a filter element and a waterproof and breathable membrane. The two ends of the main internal threaded pipe are respectively threaded to one end of the filter element and threaded to a transition joint.
[0009] The waterproof and breathable membrane is nested and fixed inside the middle of the filter element, and the other end of the filter element and the waterproof and breathable membrane are both located outside the outer shell of the machine body. One end of the filter element has several air guide holes along its circumference.
[0010] Preferably, the constant temperature module is a semiconductor cooler, the absorption cell is equipped with a temperature sensor, and the other side of the outer shell of the machine body is equipped with a connecting wire that can be electrically connected to the detection structure, the constant temperature module, and the temperature sensor.
[0011] Preferably, the air pump assembly includes an air pump, and the input end and output end of the air pump are respectively connected to a first drain pipe and a second drain pipe. The first drain pipe serves as the input structure of the air pump assembly and is connected to the corresponding filter element, and the second drain pipe serves as the output structure of the air pump assembly and is connected to the air inlet connector.
[0012] A protective cover is installed between the bottom of the air pump housing and the top of the inner support frame to isolate the detection structure kit, and the air pump is located on the top layer structure of the protective cover and is closest to the top inner wall of the machine body.
[0013] Preferably, the outer shell of the machine body includes two sets of upper C-shaped plates in opposite positions and two sets of lower C-shaped plates in opposite positions, and a support plate is installed between two adjacent upper C-shaped plates or between two adjacent lower C-shaped plates. The end of the support plate can be assembled with the corresponding side structure of the upper C-shaped plate or the corresponding side structure of the lower C-shaped plate by screws.
[0014] The two upper C-shaped plates and the two lower C-shaped plates are assembled one-to-one to form two sets of annular frames. The two sets of annular frames are aligned with each other and form a fitting space under the assembly and connection of the support plates. The fitting space is fixedly fitted with an outer protective shell.
[0015] An assembly plate is provided at the connection between the bottom of the upper C-shaped plate and the top of the corresponding lower C-shaped plate. The top of the assembly plate is assembled with the bottom of the upper C-shaped plate and the bottom of the assembly plate is assembled with the top of the lower C-shaped plate using screws.
[0016] Preferably, the outer protective housing is formed by aligning and assembling two upper housings and a lower housing, and several heat dissipation grooves are fixed on the surfaces of both the upper and lower housings. The lower housing has a first clearance hole on each side that can be fitted with a transition pipe and a second clearance hole that can be fitted with a connecting wire.
[0017] This utility model has the following beneficial effects:
[0018] 1. This utility model consists of a multi-functional flow guiding component composed of a transition pipe and a waterproof and breathable membrane. In addition to providing a guiding space for the air to be tested, the waterproof and breathable membrane can also isolate the air from dust and water, thereby ensuring that clean air is introduced into the absorption pool for testing, thus fully guaranteeing the high accuracy of the test.
[0019] 2. This utility model forms a circulating pumping structure through the set air pumping components, the outlet pipe, and the air outlet and inlet joints set on the absorption tank. During the subsequent detection of the structure being tested in the absorption tank, the air to be tested can be automatically guided and delivered in an automatically controlled speed pumping circulation mode, thereby optimizing the overall use effect of the device.
[0020] 3. This utility model uses a constant temperature module and associated temperature sensor to regulate the air inside the absorption cell, thereby creating a high-precision detection environment and improving detection accuracy. Attached Figure Description
[0021] Figure 1 This is a front view schematic diagram of the absorption cell structure of this utility model;
[0022] Figure 2 This is a partial cross-sectional view of the structure of this utility model;
[0023] Figure 3 This is a cross-sectional schematic diagram of the main internal threaded tube of this utility model.
[0024] Figure 4 This is a three-dimensional schematic diagram of the structure of this utility model.
[0025] In the diagram: 1. Outer shell; 101. Upper C-shaped plate; 102. Lower C-shaped plate; 103. Assembly plate; 2. Support plate; 3. Outer protective shell; 4. Transition pipe; 41. Main internal threaded pipe; 42. Filter element; 43. Air guide hole; 44. Transition joint; 5. Inner support frame; 6. Absorption tank; 7. Pump assembly; 71. Air pump; 72. First drain pipe; 73. Second drain pipe; 8. Constant temperature module; 9. Air outlet joint; 10. Air inlet joint; 11. Heat dissipation groove; 12. Outlet pipe; 13. Detection structure; 14. Connecting wire; 15. Waterproof and breathable membrane. Detailed Implementation
[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0027] Please see Figures 1-4 A high-precision laser gas analyzer includes a housing 1 and a detection structure 13 housed within the housing 1. The detection structure 13 includes a semiconductor laser emitting module, a receiving module, and a communication module. The semiconductor laser emitting module can guide laser light into an absorption cell 6 via an optical fiber to perform laser detection on the air inside the absorption cell 6, thereby meeting the hardware requirements for high-precision detection of the target air inside the absorption cell 6.
[0028] The front and rear ends of one side of the outer casing 1 are fitted with transition pipes 4, and the transition pipes 4 are equipped with waterproof and breathable membranes 15. Inside the outer casing 1, there is an inner support frame 5, a pumping assembly 7, and an absorption tank 6. The absorption tank 6 and the pumping assembly 7 are respectively installed at the top and bottom of the inner support frame 5. A detection structure 13 is installed at the top of the inner support frame 5 and can detect the air inside the absorption tank 6. A constant temperature module 8 is installed on the surface of the absorption tank 6, specifically using a semiconductor cooler. A temperature sensor is installed inside the absorption tank 6. The other side of the outer shell 1 is fitted with a connecting wire 14 that can be electrically connected to the detection structure 13, the constant temperature module 8, and the temperature sensor. The surface of the absorption tank 6 is provided with an outlet connector 9 and an inlet connector 10. The input structure of the pumping assembly 7 is connected to one of the transition pipes 4, and the output structure of the pumping assembly 7 is connected to the inlet connector 10. An outlet pipe 12 is installed between the outlet connector 9 and the other transition pipe 4. The pumping assembly 7 can circulate and pump air into the absorption tank 6 through the two transition pipes 4, the outlet connector 9, and the inlet connector 10.
[0029] The transition fitting 4 includes a main internal threaded pipe 41, the middle part of which is fitted inside the corresponding side wall of the outer protective housing 3. The filter assembly includes a filter element 42 and a waterproof and breathable membrane 15. Both ends of the main internal threaded pipe 41 are threadedly connected to one end of the filter element 42 and threadedly connected to a transition joint 44, respectively.
[0030] The waterproof and breathable membrane 15 is nested and fixed inside the middle of the filter element 42, and the other end of the filter element 42 and the waterproof and breathable membrane 15 are both located outside the outer shell 1 of the machine body. One end of the filter element 42 has several air guide holes 43 opened around its circumference. The transition pipe 4 can not only meet the space requirements of the external ambient air introduction channel, but also perform water and dust isolation treatment on the external ambient air, further optimizing the use effect of subsequent high-precision detection. The combination formed by the other end of the filter element 42 and the waterproof and breathable membrane 15 is located outside the outer shell 1 of the machine body, which can facilitate the replacement or rinsing of the combination formed by the filter element 42 and the waterproof and breathable membrane 15, thereby maintaining the technical effect of continuous use of the whole device.
[0031] The air pump assembly 7 includes an air pump 71. The input end and the output end of the air pump 71 are respectively connected to a first drain pipe 72 and a second drain pipe 73. The first drain pipe 72 serves as the input structure of the air pump assembly 7 and is connected to the corresponding filter element 42. The second drain pipe 73 serves as the output structure of the air pump assembly 7 and is connected to the air inlet connector 10. A protective cover that can isolate the detection structure 13 is installed between the bottom of the housing of the air pump 71 and the top of the inner support frame 5. The air pump 71 is located on the top layer of the protective cover and is closest to the top inner wall of the outer shell 1 to avoid structural interference.
[0032] When in use, start the air pump 71. The air pump 71 automatically pumps the air to be detected from the outside into the absorption tank 6 through the first diversion pipe 72 and the corresponding transition pipe 4 and controls the pumping speed. The air pump 71 can be an existing product of Yuanxun Intelligent Technology (Shanghai) Co., Ltd.
[0033] After the air to be tested enters the absorption cell 6, the temperature sensor detects the temperature inside the absorption cell 6 and triggers the constant temperature module 8. The constant temperature module 8 then heats or cools the air inside the absorption cell 6, thereby ensuring that the space inside the absorption cell 6 is in a relatively constant temperature state. Subsequently, the semiconductor laser emitting module inside the detection structure 13 guides the laser into the absorption cell 6 through an optical fiber to perform laser detection on the air inside the absorption cell 6, thereby meeting the high-precision detection of the target air inside the absorption cell 6. The relevant detection data is uploaded to the host computer or central control platform through the connecting wire 14. After the detection is completed, the air is discharged through the outlet pipe 12 and the corresponding transition pipe 4, thereby meeting the requirements of subsequent high-precision detection cycles.
[0034] Please see Figure 4The outer shell 1 includes two sets of upper C-shaped plates 101 and two sets of lower C-shaped plates 102 in opposite positions. Support plates 2 are installed between adjacent upper C-shaped plates 101 or between adjacent lower C-shaped plates 102. The ends of the support plates 2 can be assembled with the side structures of the corresponding upper C-shaped plates 101 or the corresponding lower C-shaped plates 102 by screws. The two upper C-shaped plates 101 and the two lower C-shaped plates 102 are assembled one-to-one to form two sets of annular frames. The two sets of annular frames are aligned with each other and form a fitting space under the assembly connection of the support plates 2. The fitting space is fixedly fitted with an outer protective shell 3. An assembly plate 103 is provided at the connection between the bottom of the upper C-shaped plate 101 and the top of the corresponding lower C-shaped plate 102. The top of the assembly plate 103 is assembled with the bottom of the upper C-shaped plate 101 and the bottom of the assembly plate 103 is assembled with the top of the lower C-shaped plate 102 by screws.
[0035] The outer protective housing 3 is formed by aligning and assembling two upper housings and a lower housing. Several heat dissipation grooves 11 are fixed on the surface of both the upper housing and the lower housing. The lower housing has a first clearance hole that can be fitted with the transition pipe 4 and a second clearance hole that can be fitted with the connecting wire 14 on both sides.
[0036] In use, considering the need for convenient maintenance after damage to the internal components of the outer casing 1, the screws installed between the assembly plate 103 and the upper C-shaped plate 101 and the lower C-shaped plate 102, and the screws installed between the support plate 2 and the upper C-shaped plate 101 and the support plate 2 and the assembly plate 103 can be removed. After this is done, the upper C-shaped plate 101, the lower C-shaped plate 102, the assembly plate 103, the support plate 2 and the outer protective shell 3 can be flexibly separated, thereby making full room for maintenance of the internal components of the outer casing 1, which is convenient for maintenance.
[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Additionally, in the accompanying drawings of this utility model, the fill patterns are merely for distinguishing layers and do not constitute any other limitation.
[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A high-precision laser gas analyzer, comprising a machine body shell (1) and a detection structure (13) sleeved in the machine body shell (1), characterized in that: The front and rear ends of one side of the outer shell (1) of the machine body are fitted with transition pipes (4), and a filter assembly is installed inside the transition pipes (4). The inner support frame (5), the air pump assembly (7), and the absorption tank (6) are installed inside the outer shell (1). The absorption tank (6) and the air pump assembly (7) are respectively installed at the top and bottom of the inner support frame (5). The detection structure (13) is installed at the top of the inner support frame (5) and can detect the air inside the absorption tank (6). A constant temperature module (8) is installed on the surface of the absorption tank (6). The surface of the absorption tank (6) is provided with an outlet connector (9) and an inlet connector (10). The input structure of the pumping assembly (7) is connected to one of the transition pipes (4), and the output structure of the pumping assembly (7) is connected to the inlet connector (10). An outlet pipe (12) is installed between the outlet connector (9) and the other transition pipe (4). The pumping assembly (7) can circulate and pump air in the absorption tank (6) through the two transition pipes (4), the outlet connector (9), and the inlet connector (10).
2. The high precision laser gas analyzer according to claim 1, characterized in that: The detection structure (13) includes a semiconductor laser emitting module, a receiving module and a communication module. The semiconductor laser emitting module can guide the laser into the absorption cell (6) through an optical fiber to perform laser detection on the air inside the absorption cell (6).
3. The high precision laser gas analyzer according to claim 1, characterized in that: The transition fitting (4) includes a main internal threaded pipe (41), the middle part of which is fitted inside the corresponding side wall of the outer protective shell (3). The filter assembly includes a filter element (42) and a waterproof and breathable membrane (15). The two ends of the main internal threaded pipe (41) are threaded to one end of the filter element (42) and threaded to a transition joint (44). The waterproof and breathable membrane (15) is nested and fixed inside the middle of the filter element (42), and the other end of the filter element (42) and the waterproof and breathable membrane (15) are both located outside the outer shell (1) of the machine body. A number of air guide holes (43) are opened at one end of the filter element (42) along its circumference.
4. The high precision laser gas analyzer of claim 1, wherein: The constant temperature module (8) specifically adopts a semiconductor cooler. The absorption cell (6) is equipped with a temperature sensor. The other side of the outer shell (1) is equipped with a connecting wire (14) that can be electrically connected to the detection structure (13), the constant temperature module (8), and the temperature sensor.
5. The high precision laser gas analyzer of claim 3, wherein: The air pump assembly (7) includes an air pump (71). The input end and the output end of the air pump (71) are respectively connected to a first drain pipe (72) and a second drain pipe (73). The first drain pipe (72) serves as the input structure of the air pump assembly (7) and is connected to the corresponding filter element (42). The second drain pipe (73) serves as the output structure of the air pump assembly (7) and is connected to the air inlet connector (10). A protective cover capable of isolating the detection structure (13) is installed between the bottom of the housing of the air pump (71) and the top of the inner support frame (5), and the air pump (71) is located on the top layer structure of the protective cover and is closest to the top inner wall of the outer shell (1).
6. A high-precision laser gas analyzer according to claim 1, characterized in that: The outer shell (1) includes two sets of upper C-shaped plates (101) in opposite positions and two sets of lower C-shaped plates (102) in opposite positions. A support plate (2) is installed between two adjacent upper C-shaped plates (101) or between two adjacent lower C-shaped plates (102). The end of the support plate (2) can be assembled with the side structure of the corresponding upper C-shaped plate (101) or the side structure of the corresponding lower C-shaped plate (102) by screws. The two upper C-shaped plates (101) and the two lower C-shaped plates (102) are assembled one-to-one to form two sets of annular frames. The two sets of annular frames are aligned with each other and connected by the support plate (2) to form a set space. The set space is fixedly fitted with an outer protective shell (3). An assembly plate (103) is provided at the connection between the bottom of the upper C-shaped plate (101) and the top of the corresponding lower C-shaped plate (102). The top of the assembly plate (103) and the bottom of the upper C-shaped plate (101), and the bottom of the assembly plate (103) and the top of the lower C-shaped plate (102) are assembled by screws.
7. A high precision laser gas analyzer according to claim 6, characterized in that: The outer protective shell (3) is formed by assembling two upper shells and a lower shell, and several heat dissipation grooves (11) are fixed on the surface of the upper shell and the surface of the lower shell. The inner walls of the upper shell and the lower shell are covered with heat-insulating rock wool. The lower shell has a first clearance hole that can be fitted with the transition pipe (4) and a second clearance hole that can be fitted with the connecting wire (14) on both sides.