High-reliability oxygen concentration measuring mechanism of laser analyzer

Abstract

The utility model discloses a high-reliability oxygen concentration measuring mechanism of a laser analyzer. The high-reliability oxygen concentration measuring mechanism comprises a replacement unit and a measuring unit, the replacement unit comprises an explosion-proof cavity, an inert gas inlet is formed in the bottom of the explosion-proof cavity, a replacement channel is formed in the explosion-proof cavity, an inlet of the replacement channel is communicated with the inert gas inlet, a gas outlet of the replacement channel is connected with a transmitting end seat, and a sintering flame-retardant device is arranged on the rear side of the transmitting end seat; a replacement gas outlet is formed in the sintering flame retardant device; the measuring unit comprises a laser arranged on the transmitting end seat, the laser is used for transmitting a laser beam for measurement, a lens matched with the laser for use is arranged on the rear side of the laser, and the lens is arranged on a laser transmitting path of the laser. According to the utility model, through complete replacement of inert gas, the inherent oxygen content in the transmitting end seat is effectively eliminated, the accuracy of measuring the oxygen content is improved, and the basic value fluctuation indicating value is greatly reduced, so that the measuring result is more stable and reliable.

Description

Technical Field

[0001] This utility model relates to the field of oxygen content measurement technology, and in particular to a highly reliable oxygen concentration measurement mechanism for a laser analyzer. Background Art

[0002] Currently, explosion-proof laser analyzers used domestically generally employ the same measurement structure. However, due to the diverse operating conditions in environmental protection enterprises, the requirements for measuring the gas composition inside chimneys are also diverse. Commonly measured components include hydrogen chloride, carbon monoxide, hydrofluoric acid, ammonia, hydrogen sulfide, oxygen, and methane. Among these, accurate measurement of oxygen content is particularly critical. However, in existing publicly available related products (such as...) Figure 1 As shown in the figure, since the transmitter mount is not in a vacuum state, it contains an oxygen content of up to 21%, which poses a significant challenge to the accurate measurement of oxygen content.

[0003] Specifically, when a laser measures through a lens, the high oxygen content within the emitter causes significant fluctuations in the baseline value, leading to increased transmittance variation errors and making it impossible to accurately measure the true gas concentration. This problem not only affects the accuracy of the measurement results but also significantly increases the linearity error of the equipment. Although some companies have attempted to correct this through software algorithms, this method often fails to truly reflect the actual concentration value, resulting in less than ideal performance.

[0004] Furthermore, existing explosion-proof laser analyzers suffer from excessively high laser TEC (temperature control circuit) temperatures. Excessive temperatures can not only cause the laser to stop working or become damaged, but also further exacerbate measurement errors and equipment performance instability.

[0005] In summary, existing explosion-proof laser analyzers have many shortcomings when measuring oxygen content, such as large fluctuations in baseline values, inaccurate numerical values, excessively high laser TEC temperature, and large linearity errors. These problems severely restrict the performance and measurement accuracy of the equipment. Utility Model Content

[0006] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0007] Therefore, in order to solve the above-mentioned technical problems, this utility model provides the following technical solution: a highly reliable laser analyzer oxygen concentration measurement mechanism, including a displacement unit and a measurement unit;

[0008] The replacement unit includes an explosion-proof cavity, an inert gas inlet is arranged at the bottom of the explosion-proof cavity, a replacement channel is arranged inside the explosion-proof cavity, the inlet of the replacement channel is connected to the inert gas inlet, the outlet of the replacement channel is connected to the launch end seat, a sintered flame retardant is arranged on the rear side of the launch end seat, and a replacement gas outlet is arranged on the sintered flame retardant.

[0009] The measurement unit includes a laser arranged on the transmitting end mount. The laser is used to emit a laser beam for measurement. A lens is arranged behind the laser and is used to work with it. The lens is arranged on the laser emission path of the laser and is used to focus the laser beam emitted by the laser to improve the measurement accuracy.

[0010] When inert gas at 0.2 MPa is introduced into the explosion-proof cavity, and a replacement process of approximately 30 minutes is performed, the oxygen content inside the equipment can be significantly reduced. Measurements taken at this time will show that changes in baseline values ​​and transmittance are effectively controlled. Simultaneously, the heat generated during laser operation is smoothly dissipated with the flow of the replacement gas, effectively reducing the laser's operating temperature, providing reliable protection, and further extending its service life.

[0011] As a preferred embodiment of the oxygen concentration measuring mechanism of the high-reliability laser analyzer described in this utility model, the inert gas inlet is arranged at the bottom of the explosion-proof cavity, and the displacement gas outlet is located downstream of the sintered flame retardant. This ensures that the inert gas can smoothly enter the equipment for oxygen displacement, and also allows the displacement gas and the heat generated by the laser during operation to be smoothly discharged from the displacement gas outlet.

[0012] As a preferred embodiment of the oxygen concentration measurement mechanism of the high-reliability laser analyzer described in this utility model, the displacement channel includes a horizontal inlet pipe, a vertical pipe and a horizontal exhaust pipe. The horizontal inlet pipe is connected to an inert gas inlet, the horizontal exhaust pipe is connected to a transmitter base, and the vertical pipe is arranged between the horizontal inlet pipe and the horizontal exhaust pipe. The two ends of the vertical pipe are respectively connected to the horizontal inlet pipe and the horizontal exhaust pipe.

[0013] As a preferred embodiment of the oxygen concentration measurement mechanism of the high-reliability laser analyzer described in this utility model, the displacement channel further includes an arc-shaped retention tube. The inlet and outlet ends of the vertical tube are connected to the horizontal inlet and outlet pipes respectively through the arc-shaped retention tube, which prolongs the residence time of the inert gas and helps to more fully dilute and displace the original oxygen, because gas molecules have more opportunities to mix and diffuse in a longer path.

[0014] As a preferred embodiment of the oxygen concentration measuring mechanism of the high-reliability laser analyzer described in this utility model, the transmitting end is connected to the explosion-proof cavity to form a channel for gas flow. The laser and the lens are both built into the channel, and the channel allows inert gas to flow from the explosion-proof cavity and continue to flow to subsequent components.

[0015] As a preferred embodiment of the oxygen concentration measurement mechanism of the high-reliability laser analyzer described in this utility model, the sintered flame retardant is located downstream of the emitting end seat to further ensure the purity of the gas and prevent oxygen backflow, while allowing the displaced gas to be discharged smoothly, thereby ensuring the stability and efficiency of the entire measurement process.

[0016] The beneficial effects of this utility model are:

[0017] 1. This utility model effectively eliminates the inherent oxygen content in the transmitter holder by completely replacing it with inert gas, thereby significantly improving the accuracy of oxygen content measurement; the fluctuation of the baseline value is greatly reduced, making the measurement results more stable and reliable.

[0018] 2. The introduction of inert gas in this invention not only helps to replace oxygen content, but also cools the laser TEC, which effectively reduces the laser's operating temperature, improves its utilization rate, reduces the risk of damage, and thus reduces the company's maintenance costs.

[0019] 3. Due to the accurate measurement of oxygen content and the effective control of the laser TEC temperature, the overall performance and numerical accuracy of this utility model are significantly improved. The stability, precision and reliability of the equipment are enhanced, providing a strong guarantee for the gas component measurement of enterprises. Due to the reduction in equipment failure rate, the number of maintenance times is also reduced, thereby reducing the maintenance costs of enterprises and further improving the operational efficiency of enterprises. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0022] Figure 2 This is a schematic diagram of the overall structure of the existing technology.

[0023] In the diagram: 100, Replacement unit; 101, Explosion-proof cavity; 102, Inert gas inlet; 103, Replacement channel; 1031, Horizontal inlet pipe; 1032, Vertical pipe; 1033, Horizontal exhaust pipe; 1034, Arc-shaped retention pipe; 104, Launching end seat; 105, Sintered flame retardant; 106, Replacement gas outlet;

[0024] 200. Measurement unit; 201. Laser; 202. Lens. Detailed Implementation

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0028] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0029] Reference Figure 1 As an embodiment of the present invention, a highly reliable oxygen concentration measuring mechanism for a laser analyzer is provided, comprising a displacement unit 100 and a measuring unit 200;

[0030] The replacement unit 100 includes an explosion-proof cavity 101. An inert gas inlet 102 is arranged at the bottom of the explosion-proof cavity 101. A replacement channel 103 is arranged inside the explosion-proof cavity 101. The inlet of the replacement channel 103 is connected to the inert gas inlet 102, and the outlet of the replacement channel 103 is connected to a launcher base 104. A sintered flame retardant 105 is arranged on the rear side of the launcher base 104, and a replacement gas outlet 106 is arranged on the sintered flame retardant 105. The replacement channel 103 includes a horizontal inlet pipe 1031, a vertical pipe 1032, an arc-shaped retaining pipe 1034, and a horizontal exhaust pipe 1033. The horizontal inlet pipe 1031 is connected to the inert gas inlet 102, and the horizontal exhaust pipe 1033 is connected to the launcher base 104. The vertical pipe 1032 is arranged between the horizontal inlet pipe 1031 and the horizontal exhaust pipe 1033, and the vertical pipe 1032 is used for gas intake. Both the inert gas inlet and outlet are connected to the horizontal inlet pipe 1031 and the horizontal exhaust pipe 1033 respectively via an arc-shaped retention pipe 1034, which prolongs the residence time of the inert gas and helps to more fully dilute and replace the original oxygen, because gas molecules have more opportunities to mix and diffuse in a longer path. The inert gas inlet 102 is arranged at the bottom of the explosion-proof cavity 101, and the replacement gas outlet 106 is located downstream of the sintered flame retardant 105, which ensures that the inert gas can smoothly enter the equipment for oxygen replacement, and also allows the replaced gas and the heat generated when the laser 201 is working to be smoothly discharged from the replacement gas outlet 106. The sintered flame retardant 105 is located downstream of the transmitter base 104 to further ensure the purity of the gas and prevent oxygen backflow, while allowing the replaced gas to be discharged smoothly, thereby ensuring the stability and efficiency of the entire measurement process.

[0031] The measurement unit 200 includes a laser 201 arranged on the transmitting end base 104. The laser 201 is used to emit a laser beam for measurement. A lens 202 is arranged behind the laser 201 for use with it. The lens 202 is arranged on the laser emission path of the laser 201 to focus the laser beam emitted by the laser 201 to improve the measurement accuracy. The transmitting end base 104 is connected to the explosion-proof cavity 101 to form a channel for gas flow. The laser 201 and the lens 202 are both built into this channel, and the channel allows inert gas to flow from the explosion-proof cavity 101 and continue to flow to subsequent components.

[0032] Replacement process:

[0033] Inert gas at 0.2 MPa is introduced into the explosion-proof cavity 101 through the inert gas inlet 102;

[0034] Inert gas enters the displacement channel 103, which has an approximately U-shaped structure. The inert gas passes through the horizontal intake pipe 1031, the vertical pipe 1032, the arc-shaped retention pipe 1034, and the horizontal exhaust pipe 1033. In the displacement channel 103, the inert gas is fully retained and mixed, so as to more fully dilute and replace the original oxygen.

[0035] The replaced gas and the heat generated during the operation of the laser 201 are smoothly discharged through the replacement gas outlet 106 on the sintering flame retardant 105, effectively reducing the operating temperature of the laser 201.

[0036] Measurement process:

[0037] Laser 201 emits a laser beam, which is focused by lens 202 and then irradiates the gas to be tested. The laser beam is scattered and absorbed in the gas to be tested, and part of the laser beam is received by the receiver and converted into an electrical signal. Based on the intensity of the received electrical signal, combined with the known intensity of the laser beam and the scattering and absorption characteristics, the oxygen concentration in the gas to be tested is calculated.

[0038] It is worth noting that the entire device is controlled by a controller. Since the controller is a common device and belongs to existing mature technology, its electrical connection relationship and specific circuit structure will not be described in detail here.

[0039] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A highly reliable oxygen concentration measurement mechanism for a laser analyzer, characterized in that: It includes a displacement unit (100) and a measurement unit (200); The replacement unit (100) includes an explosion-proof cavity (101), an inert gas inlet (102) is arranged at the bottom of the explosion-proof cavity (101), a replacement channel (103) is arranged inside the explosion-proof cavity (101), the entrance of the replacement channel (103) is connected to the inert gas inlet (102), the outlet of the replacement channel (103) is connected to the launch end seat (104), a sintered flame retardant (105) is arranged on the rear side of the launch end seat (104), and a replacement gas outlet (106) is arranged on the sintered flame retardant (105). The measurement unit (200) includes a laser (201) arranged on the transmitting end base (104). The laser (201) is used to emit a laser beam for measurement. A lens (202) is arranged on the rear side of the laser (201) for use with it. The lens (202) is arranged on the laser emission path of the laser (201) to focus the laser beam emitted by the laser (201) to improve the measurement accuracy.

2. The oxygen concentration measurement mechanism of the high-reliability laser analyzer as described in claim 1, characterized in that: The inert gas inlet (102) is located at the bottom of the explosion-proof cavity (101), and the displacement gas outlet (106) is located at the bottom of the sintering flame retardant (105), so that the inert gas can smoothly enter the equipment for oxygen replacement, and the replaced gas and the heat generated by the laser (201) during operation can be smoothly discharged from the displacement gas outlet (106).

3. The oxygen concentration measurement mechanism of the high-reliability laser analyzer as described in claim 1, characterized in that: The replacement channel (103) includes a horizontal intake pipe (1031), a vertical pipe (1032), and a horizontal exhaust pipe (1033). The horizontal intake pipe (1031) is connected to the inert gas inlet (102), and the horizontal exhaust pipe (1033) is connected to the launcher (104). The vertical pipe (1032) is arranged between the horizontal intake pipe (1031) and the horizontal exhaust pipe (1033), and both ends of the vertical pipe (1032) are connected to the horizontal intake pipe (1031) and the horizontal exhaust pipe (1033), respectively.

4. The oxygen concentration measurement mechanism of the high-reliability laser analyzer as described in claim 3, characterized in that: The replacement channel (103) also includes an arc-shaped retention tube (1034). The air inlet and exhaust ends of the vertical tube (1032) are connected to the horizontal air inlet tube (1031) and the horizontal exhaust tube (1033) respectively through the arc-shaped retention tube (1034), which prolongs the residence time of the inert gas and helps to more fully dilute and replace the original oxygen.

5. The oxygen concentration measurement mechanism of the high-reliability laser analyzer as described in claim 1, characterized in that: The transmitting end mount (104) is connected to the explosion-proof cavity (101) to form a channel for gas flow. The laser (201) and the lens (202) are both built into the channel, and the channel allows inert gas to flow from the explosion-proof cavity (101) and continue to flow to subsequent components.

6. The oxygen concentration measurement mechanism of the high-reliability laser analyzer as described in claim 1, characterized in that: The sintered flame retardant (105) is located at the lower part of the emitter base (104) to further ensure the purity of the gas and prevent oxygen backflow, so as to facilitate the smooth discharge of the replaced gas, thereby ensuring the stability and efficiency of the entire measurement process.

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