An intrinsically safe laser analyzer

Abstract

The present invention provides an intrinsically safe laser analyzer, belonging to the technical field of gas detection. The invention includes an analyzer main body and a gas passage. The analyzer main body includes a laser emitter, a laser receiver, and a detection pipeline, and further includes: a gas guiding and adjusting component, a sampling and cleaning component; the opening and closing of the arc-shaped cover can control the on-off of the gas guiding port. When not detecting, the arc-shaped cover is buckled to close the gas guiding port, reducing the influence of the detection pipeline on the gas flow in the gas passage; the cooperation of two arc-shaped covers and an elastic windproof cloth guides and mixes gases at different heights, improving the accuracy of the detection result; the movement of the magnetic ring is controlled by an electromagnet, so that the corrugated sleeve expands and contracts to change the internal space size, realizing the inhalation and discharge of gases. Detection is carried out in a relatively enclosed space, and the gas state is relatively stable, reducing the detection error caused by the activity of molecules. When the magnetic ring moves for gas sampling, the annular brush automatically cleans the arc-shaped filter plate without affecting the entry of gases, improving the detection efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of gas detection, and in particular, to an intrinsically safe laser analyzer. Background Art

[0002] In industrial production and environmental monitoring, laser analyzers are often used to detect and analyze the components of gas, liquid or solid samples. However, in some hazardous environments, such as petrochemical, mine, pharmaceutical and food processing industries, there may be flammable and explosive gases or dusts, which requires the analyzer to have an intrinsically safe design to prevent any electric spark or thermal effect that may cause an explosion. Intrinsically safe laser analyzers are widely used in flammable and explosive industries such as petroleum, chemical, coal, and pharmaceutical. In these industries, accurate monitoring of gas components is crucial for ensuring production safety.

[0003] In the prior art, a detection tube is usually set in the middle of the gas flow channel to allow gas to flow in. Since different gases have different densities, and the detection tube is usually only in the middle of the channel, only the gas near this position can be collected, and it is difficult to obtain a uniform sample of gases with different densities at the top and bottom of the channel, resulting in the detection result not being able to accurately reflect the true composition of the overall gas. In addition, when the prior art detects gas, the gas to be detected is in a flowing state, and its molecules are very active. The gas molecules will constantly perform random thermal motion and move and diffuse rapidly along with the flow of the gas. This active molecular state makes it difficult for the gas to maintain a relatively stable distribution and concentration during the detection process. For example, in the case of unstable gas flow, local turbulence or eddy currents may occur in the gas, resulting in uneven gas concentration in the detection area, thus affecting the stability and accuracy of the detection result.

[0004] How to invent an intrinsically safe laser analyzer to solve these problems has become an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] To make up for the above deficiencies, the present invention provides an intrinsically safe laser analyzer, aiming to solve the problems mentioned in the above background.

[0006] The present invention is implemented as follows:

[0007] The present invention provides an intrinsically safe laser analyzer, which includes an analyzer main body and a gas channel. The analyzer main body includes a laser emitter, a laser receiver, and a detection pipeline. A side flange pipeline is arranged on the gas channel. One ends of the laser emitter and the laser receiver are respectively provided with mounting parts, and are connected to the side flange pipeline through the mounting parts. A light window is arranged inside the mounting part. The detection pipeline is inserted and installed on the gas channel through the port of the side flange pipeline. The detection pipeline is located between the two mounting parts and its end is flush with the flange end of the mounting part. An air guide port for gas to pass through is formed through the detection pipeline located inside the gas channel. Baffles are arranged at both ends of the detection pipeline, and further includes:

[0008] An air guide adjustment assembly: The air guide adjustment assembly is arranged on the detection pipeline and is located on the upper and lower sides of the air guide port;

[0009] A sampling and cleaning assembly: The sampling and cleaning assembly is arranged inside the detection pipeline and is distributed on the left and right sides of the air guide port.

[0010] Preferably, a clamping block is arranged on one side of the baffle away from the air guide port, and a clamping groove matching the clamping block is arranged on the flange end of the mounting part. The opening direction of the air guide port is consistent with the gas flow direction.

[0011] Preferably, the air guide adjustment assembly includes an arc-shaped baffle, an elastic windproof cloth, a driving device, and a first mounting groove and a second mounting groove formed on the detection pipeline. A gas guide area is formed in the middle position of the detection pipeline. The gas guide area is in a state of being concave towards the inner side of the detection pipeline, and its inner end is not communicated with the inner cavity of the detection pipeline. The number of the arc-shaped baffle, the elastic windproof cloth, and the micro electric cylinder is two. The two arc-shaped baffles are distributed on the upper and lower sides of the air guide port in a centrosymmetric manner along the geometric center of the detection pipeline. One end of the arc-shaped baffle is provided with a connecting plate, a connecting rod is fixedly connected to the connecting plate, a gear is fixedly connected to the connecting rod located outside the connecting plate, and both ends of the gear are respectively rotatably clamped inside the side wall of the first mounting groove. A driving device for controlling the rotation of the arc-shaped baffle is arranged on the detection pipeline. One end of the elastic windproof cloth is fixed to one side of the arc-shaped baffle facing the air inlet end of the air guide port, and the other end is fixed to the side wall of the gas guide area at the air inlet end of the air guide port. One ends of the two elastic windproof cloths away from the arc-shaped baffle are respectively distributed on the upper and lower sides of the air inlet end of the air guide port. An arc-shaped filter plate is installed at the air guide port.

[0012] Preferably, the driving device includes a micro electric cylinder and a rack. The micro electric cylinder is fixedly installed in the second installation groove. The output end of the micro electric cylinder is fixedly connected to one end of the rack. A through hole matching the output end of the micro electric cylinder and a sliding groove for limiting the rack are provided between the first installation groove and the second installation groove. The gear is meshed with the rack. The micro electric cylinder and the gear are both inside the outer side wall of the detection pipeline. The micro electric cylinder is electrically connected to the analyzer main body.

[0013] Preferably, when the two arc-shaped covers are buckled, their outer surfaces are coaxial with the outer wall of the detection pipeline and can completely block the air guide port. When the two arc-shaped covers are separated, the elastic windproof cloth is in an inclined state.

[0014] Preferably, the elastic windproof cloth is a thermoplastic polyurethane elastomer film.

[0015] Preferably, the sampling and cleaning assembly includes a corrugated sleeve, a magnetic ring, an annular brush and an electromagnet. A connecting slip ring is provided on the outer side of the magnetic ring. The magnetic ring is slidably and sealingly connected to the inner wall of the detection pipeline through the connecting slip ring. One ends of the electromagnet and the corrugated sleeve are both fixed on the baffle. The corrugated sleeve is sleeved on the outer side of the electromagnet. A spring is fixedly connected to one side of the electromagnet. The ends of the corrugated sleeve and the spring away from the baffle are both fixed to one side of the magnetic ring. A conical cylinder is recessed in the middle of the magnetic ring. A sealing groove is provided at one end of the conical cylinder facing the electromagnet. A light-transmitting plate is clamped and installed in the sealing groove.

[0016] Preferably, an air outlet valve is provided on the upper side of the conical cylinder and an air inlet valve is provided on the lower side. Both the air inlet valve and the air outlet valve are one-way valves. The light-transmitting plate matches the laser path. The air outlet valve and the air inlet valve are respectively located on the upper and lower sides of the light-transmitting plate. The electromagnet and the baffle are provided with hole channels matching the laser path.

[0017] Preferably, an annular brush is fixedly installed on the outer side wall of the magnetic ring away from the electromagnet. The bristles of the annular brush abut against the side wall of the arc-shaped filter plate. A leakage groove for discharging impurities is provided on the bottom wall of the air guide area.

[0018] Preferably, one end of the magnetic ring away from the electromagnet is non-magnetic. When the electromagnet is energized, the magnetic poles of the opposite surfaces of the magnetic ring and the electromagnet on its corresponding side are the same-pole magnetic settings. The electromagnet is electrically connected to the analyzer main body. The space jointly enclosed by the magnetic ring, the inner cavity of the corrugated sleeve and the installation part on its corresponding side in the initial state is sealed.

[0019] The beneficial effects of the present invention are:

[0020] The opening and closing of the arc-shaped baffle can control the on-off of the air guide port. When not in detection, the arc-shaped baffle is buckled to close the air guide port, reducing the influence of the detection pipeline on the gas flow in the gas channel, and reducing the erosion and corrosion of the gas on the internal components of the detection pipeline, prolonging the service life of the equipment; the cooperation of the two arc-shaped baffles and the elastic windproof cloth can guide the gases at different heights in the gas channel into the detection pipeline for mixing, solving the problem in the prior art that the samples are not representative due to the natural stratification of gases. After different-density gases are fully mixed, the gas samples entering the detection area can more accurately reflect the true composition of the overall gas, improving the accuracy of the detection results. At the same time, the elastic windproof cloth is in an inclined state to play a guiding and buffering role for the gases entering the air guide port, preventing the unstable air flow from affecting the detection results and ensuring the stability of the detection.

[0021] By controlling the movement of the magnetic ring with an electromagnet, the corrugated sleeve expands and contracts to change the internal space size. Using the principle of pressure difference and the characteristics of the one-way valve, the gas can enter and exit the conical cylinder automatically and orderly. When detecting in a relatively closed conical cylinder, the activity range of gas molecules is limited, and a relatively balanced and stable state can be achieved, reducing the detection error caused by the active molecules. Moreover, the uniformity of the gas guided and mixed by the elastic windproof cloth can be better maintained when detecting in a closed space, avoiding concentration stratification or non-uniformity, and further improving the detection accuracy; the inhalation and discharge processes of the gas are automatically completed using the pressure difference and the one-way valve. When the magnetic ring moves for gas sampling, the annular brush automatically cleans the arc-shaped filter plate without affecting the entry of the gas. The whole process is efficient and highly automated, improving the detection efficiency.

[0022] When detecting in a relatively closed space, the gas state is relatively stable, and the detection conditions are easier to control. As long as the initial conditions in the closed space are the same for each detection, relatively consistent detection results can be obtained, solving the problem in the prior art that the repeatability of the detection results is poor due to the unstable gas state in direct sampling, and providing reliable data support for scenarios such as scientific research and industrial production that require multiple detection and comparative analysis. Brief Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 It is a schematic diagram of the overall installation structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the structure when the present invention is working;

[0026] Figure 3It is a rear view schematic diagram of the partial sectional structure of the present invention;

[0027] Figure 4 is the Figure 3 schematic diagram of the enlarged structure at position A in

[0028] Figure 5 It is a front view sectional structure schematic diagram of the present invention;

[0029] Figure 6 is the Figure 5 schematic diagram of the enlarged structure at position B in

[0030] Figure 7 It is a schematic diagram of the arc-shaped baffle and the elastic windproof cloth structure of the present invention;

[0031] Figure 8 It is a schematic diagram of the overall structure of the present invention;

[0032] Figure 9 It is a schematic diagram of the structure when the corrugated sleeve of the present invention extends.

[0033] In the figure: 1. Analyzer main body; 2. Detection pipeline; 3. Arc-shaped baffle; 4. Elastic windproof cloth; 5. Air guide area; 6. Corrugated sleeve; 7. Magnetic ring; 8. Ring brush; 9. Conical cylinder; 10. Gas channel; 11. Laser emitter; 12. Laser receiver; 13. Installation part; 21. First installation groove; 22. Second installation groove; 31. Connection plate; 32. Connecting rod; 33. Micro electric cylinder; 51. Arc-shaped filter plate; 52. Leakage groove; 61. Spring; 71. Connection slip ring; 72. Electromagnet; 91. Intake valve; 92. Exhaust valve; 93. Transparent plate; 94. Sealing groove; 101. Side flange pipeline; 321. Gear; 322. Rack. Specific embodiments

[0034] To make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0035] Example 1, refer to Figures 1 - 4, An intrinsically safe laser analyzer, comprising an analyzer main body 1 and a gas channel 10. The analyzer main body 1 includes a laser emitter 11, a laser receiver 12 and a detection pipeline 2. A side flange pipeline 101 is provided on the gas channel 10. One ends of the laser emitter 11 and the laser receiver 12 are respectively provided with mounting parts 13, and are connected to the side flange pipeline 101 through the mounting parts 13. An optical window is provided inside the mounting part 13, which can allow the laser to pass through smoothly, while ensuring the relative seal between the detection pipeline 2 and the outside, preventing gas leakage, and ensuring the stability of the measurement environment. The detection pipeline 2 is inserted and installed on the gas channel 10 through the port of the side flange pipeline 101. The detection pipeline 2 is located between the two mounting parts 13 and its end is flush with the flange end of the mounting part 13. An air guide port for gas to pass through is provided through the detection pipeline 2 located inside the gas channel 10. Baffles are provided at both ends of the detection pipeline 2. Further included are:

[0036] An air guide adjustment component: The air guide adjustment component is provided on the detection pipeline 2 and is located on the upper and lower sides of the air guide port;

[0037] A sampling and cleaning component: The sampling and cleaning component is provided inside the detection pipeline 2 and is distributed on the left and right sides of the air guide port.

[0038] Furthermore, a clamping block is provided on one side of the baffle away from the air guide port, and a clamping groove matching the clamping block is provided on the flange end of the mounting part 13, ensuring that when the detection pipeline 2 is installed on the mounting part 13, it can be accurately positioned, providing a good foundation for subsequent laser detection and gas flow. The opening direction of the air guide port is consistent with the gas flow direction, which can allow more target gas to smoothly enter the detection pipeline 2 through the air guide port, improving the efficiency and representativeness of gas sampling, and thus more accurately reflecting the actual composition and concentration of the gas to be measured.

[0039] The air guiding and regulating assembly includes an arc-shaped baffle 3, an elastic windscreen cloth 4, a driving device, and mounting grooves 21 and 22 provided on the detection pipeline 2. A gas guiding area 5 is provided in the middle of the detection pipeline 2. The gas guiding area 5 is in a state of being recessed towards the inner side of the detection pipeline 2, and its inner end is not communicated with the inner cavity of the detection pipeline 2. The number of arc-shaped baffles 3, elastic windscreen cloths 4, and micro electric cylinders 33 is two. The two arc-shaped baffles 3 are distributed symmetrically about the geometric center of the detection pipeline 2 on the upper and lower sides of the air guiding port. One end of the arc-shaped baffle 3 is provided with a connecting plate 31. A connecting rod 32 is fixedly connected to the connecting plate 31. A gear 321 is fixedly connected to the connecting rod 32 outside the connecting plate 31. The two ends of the gear 321 are respectively rotatably clamped in the side wall of the mounting groove 21. A driving device for controlling the rotation of the arc-shaped baffle 3 is provided on the detection pipeline 2. One end of the elastic windscreen cloth 4 is fixed to one side of the arc-shaped baffle 3 facing the air inlet end of the air guiding port, and the other end is fixed to the side wall of the gas guiding area 5 at the air inlet end of the air guiding port. One ends of the two elastic windscreen cloths 4 away from the arc-shaped baffle 3 are respectively distributed on the upper and lower sides of the air inlet end of the air guiding port. An arc-shaped filter plate 51 is installed at the air guiding port to preliminarily filter the gas entering the air guiding port, remove impurity particles in the gas, etc., and prevent them from entering the inside of the detection pipeline 2 and affecting the detection accuracy or damaging the instrument.

[0040] Furthermore, the driving device includes a micro electric cylinder 33 and a rack 322. The micro electric cylinder 33 is fixedly installed in the mounting groove 22. The output end of the micro electric cylinder 33 is fixedly connected to one end of the rack 322. A through hole matching the output end of the micro electric cylinder 33 and a sliding groove for limiting the rack 322 are provided between the mounting groove 21 and the mounting groove 22. The gear 321 is meshed with the rack 322. The micro electric cylinder 33 and the gear 321 are both within the outer side wall of the detection pipeline 2 to avoid interference during the installation of the detection pipeline 2. The micro electric cylinder 33 is electrically connected to the analyzer main body 1. The analyzer main body 1 controls the telescopic movement of the micro electric cylinder 33, thereby driving the movement of the rack 322. Since the gear 321 is meshed with the rack 322, the gear 321 can be rotated, thereby driving the arc-shaped baffle 3 to rotate around a fixed point, realizing the control of the opening and closing angle of the arc-shaped baffle 3. During detection, by opening the two arc-shaped baffles 3 (the opening amplitude thereof matches the gas passage 10), the elastic windscreen cloth 4 can be controlled to stretch. The stretched elastic windscreen cloth 4 can guide the gas at different heights of the gas passage 10 into the detection pipeline 2 for a certain mixing, improving the representativeness of the gas detection sample.

[0041] It should be noted that when the two arc-shaped baffles 3 are buckled together, their outer surfaces are coaxial with the outer wall of the detection pipe 2 and can completely block the air guide port. Through such a setting, when no detection is required, the air guide port can be closed by buckling the arc-shaped baffles 3, thereby reducing the influence of the existence of the detection pipe 2 on the gas circulation in the gas channel 10. The opening and closing of the two arc-shaped baffles 3 can control the on-off of the air guide port. When it is necessary to adjust the gas flow or stop the gas from entering a specific area of ​​the detection pipe 2, it can be achieved by controlling the relative rotation of the arc-shaped baffles 3. When the two arc-shaped baffles 3 are far away from each other, the elastic windshield cloth 4 is in an inclined state, which can play a certain guiding and buffering role for the gas entering the air guide port. , so that the gas enters the detection pipe 2 more evenly, and at the same time prevents the gas from directly impacting the detection area and affecting the detection results. The elastic windshield 4 is a thermoplastic polyurethane elastomer (TPU) film. TPU is a polymer material with the properties of both rubber and plastic. Its molecular structure contains soft segments and hard segments. The soft segment gives TPU good elasticity, allowing it to undergo large deformation when subjected to force; the hard segment provides a certain rigidity and strength. When stretched by external force, the molecular chain segments in the TPU film can move relatively, thereby stretching the film; when the external force is removed, the molecular chain segments will return to their original state under the action of intermolecular forces, and the film will also return to its initial shape.

[0042] In this embodiment, the laser emitter 11 in the analyzer body 1 emits a laser, and the laser passes through the light window inside the mounting portion 13 and enters the detection pipe 2. In the detection pipe 2, the laser reacts with the gas entering from the gas inlet, and then the laser receiver 12 receives the laser after being acted upon by the gas. By analyzing the changes in the characteristics of the laser, such as light intensity, wavelength, etc., the composition and concentration information of the gas can be obtained (existing technology, which will not be repeated here).

[0043] Gas enters the detection pipeline 2 from the gas channel 10 through the air guide port opened through the detection pipeline 2, and the air guide adjustment component is responsible for adjusting and controlling the entering gas; the driving device consists of a micro electric cylinder 33 and a rack 322. When the analyzer main body 1 controls the telescopic movement of the micro electric cylinder 33, the output end drives the rack 322 to move linearly. Since the gear 321 meshes with the rack 322, the movement of the rack 322 causes the gear 321 to rotate. The rotation of the gear 321 drives the connecting rod 32 fixedly connected thereto, and further causes the arc-shaped baffle 3 to rotate around the fixed point, thereby realizing precise control of the opening and closing angle of the arc-shaped baffle 3. When the arc-shaped baffle 3 opens, the elastic windproof cloth 4 is driven by it to stretch; when the arc-shaped baffle 3 closes, the elastic windproof cloth 4 contracts accordingly. The elastic windproof cloth 4 is made of a thermoplastic polyurethane elastomer (TPU) film. The soft segment in its molecular structure gives good elasticity, and the hard segment provides rigidity and strength. When subjected to external force stretching, the molecular chain segments in the TPU film can move relatively, so that the film elongates; when the external force is removed, the molecular chain segments return to their original state under the action of intermolecular forces, and the film also returns to its initial shape accordingly.

[0044] The optical window inside the installation part 13 allows the laser to pass through smoothly on the one hand, ensuring that the laser detection process is unobstructed; on the other hand, it ensures the relative seal between the detection pipeline 2 and the outside, effectively preventing gas leakage. The stable measurement environment greatly improves the accuracy of the detection results and avoids detection errors caused by external factor interference.

[0045] When the two arc-shaped baffles 3 are buckled together, they can completely block the air guide port. When detection is not required, closing the air guide port can significantly reduce the influence of the detection channel on the normal gas flow in the gas channel 10. At the same time, the operator can also flexibly adjust the gas flow by controlling the relative rotation of the arc-shaped baffle 3, or stop the gas from entering a specific area of the detection pipeline 2 to meet different detection requirements and working conditions.

[0046] During the detection process, the two arc-shaped baffles 3 open, and then control the elastic windproof cloth 4 to stretch. The stretched elastic windproof cloth 4 can guide the gas at different heights in the gas channel 10 into the detection pipeline 2, so that these gases are mixed. In this way, the gas sample entering the detection area is more representative and can more accurately reflect the true composition of the gas in the gas channel 10, effectively improving the reliability of the detection.

[0047] It should be noted that when the two arc-shaped covers 3 move away from each other, the elastic windscreen cloth 4 is in an inclined state, which plays a role in guiding and buffering the gas entering the air inlet. This design effectively prevents the gas from directly impacting the detection area at high speed, avoiding affecting the detection result due to unstable air flow. In addition, the arc-shaped filter plate 51 at the air inlet preliminarily filters the entering gas, capable of removing the impurity particles therein, preventing these impurities from entering the interior of the detection pipeline 2, avoiding affecting the detection accuracy, and at the same time protecting the instrument and equipment and prolonging its service life.

[0048] In the prior art, usually a detection pipe is arranged in the middle of the air flow channel to allow the gas to flow in. Different gases have different densities. For example, the density of carbon dioxide is greater than that of air and tends to sink in the natural state; while the density of hydrogen is less than that of air and tends to rise. When multiple gases flow in the air flow channel, the gas with a greater density often accumulates at the bottom of the channel, and the gas with a smaller density is distributed at the upper part of the channel, forming a natural stratification phenomenon. Since the detection pipe is usually only in the middle of the channel, it can only collect the gas near this position, and it is difficult to obtain a uniform sample of gases with different densities at the top and bottom of the channel, resulting in the detection result not being able to accurately reflect the true composition of the overall gas.

[0049] In this embodiment, by controlling the expansion of the elastic windscreen cloth 4 through the opening of the two arc-shaped covers 3, the gas at different heights in the gas channel 10 can be actively guided into the detection pipeline 2. Due to the inclined setting of the windscreen cloth and its position in the channel, the gas will intersect and collide with each other at different positions during the guiding process, thereby realizing the full mixing of gases at different heights, making the gas sample entering the detection pipeline 2 more representative, avoiding only collecting the gas sample with local characteristics, and being able to more accurately reflect the true composition of the gas in the channel, thus making the detection result more reliable.

[0050] When detection is not required, the arc-shaped covers 3 are fully buckled, which can completely seal the air inlet of the detection pipeline 2 and prevent the gas from entering the specific area of the detection pipeline 2. This function is very important in practical applications. It can reduce the interference of the detection pipeline 2 on the normal flow of the gas. In industrial production, when the gas detection equipment does not need to work temporarily, if the air inlet of the detection pipeline 2 cannot be effectively sealed, the gas may form local vortices or turbulences in the detection pipeline 2, increasing the resistance of the gas flow and affecting the efficiency of the entire gas transmission system. However, this solution can effectively solve this problem and ensure the smooth and stable flow of the gas in the pipeline.

[0051] Embodiment 2, refer to Figures 3 - 9, the sampling and cleaning component includes a corrugated sleeve 6, a magnetic ring 7, a circular brush 8 and an electromagnet 72. A connecting slip ring 71 is provided on the outer side of the magnetic ring 7. The magnetic ring 7 is slidably and hermetically connected to the inner wall of the detection pipeline 2 through the connecting slip ring 71, making the movement process of the magnetic ring 7 stable and with little resistance. One end of both the electromagnet 72 and the corrugated sleeve 6 is fixed on the baffle. The corrugated sleeve 6 is sleeved on the outer side of the electromagnet 72. One side of the electromagnet 72 is fixedly connected with a spring 61. The ends of the corrugated sleeve 6 and the spring 61 far from the baffle are both fixed to one side of the magnetic ring 7. A conical cylinder 9 is recessed in the middle of the magnetic ring 7. One end of the conical cylinder 9 facing the electromagnet 72 is provided with a sealing groove 94. A light-transmitting plate 93 is snap-fitted in the sealing groove 94. The sealing groove 94 ensures the sealing of the installation of the light-transmitting plate 93 and prevents gas leakage from affecting the detection result. The shape of the conical cylinder 9 can guide the gas to gather better in the area where the light-transmitting plate 93 is located, enabling the laser to interact with the gas more effectively and improving the accuracy of gas detection.

[0052] Further, an air outlet valve 92 is opened on the upper side of the conical cylinder 9, and an air inlet valve 91 is opened on the lower side. Both the air inlet valve 91 and the air outlet valve 92 are one-way valves. The air inlet valve 91 allows gas to enter the corrugated sleeve 6 for detection, and the air outlet valve 92 is used to discharge the detected gas. The setting of the one-way valve ensures the one-way flow of gas in the corrugated sleeve 6 and prevents backflow, enabling the gas to enter and exit the detection area orderly and improving the accuracy and efficiency of detection.

[0053] The light-transmitting plate 93 matches the laser path. The air outlet valve 92 and the air inlet valve 91 are respectively located on the upper and lower sides of the light-transmitting plate 93. The electromagnet 72 and the baffle are provided with channels matching the laser path to ensure that the laser can pass through normally. An annular brush 8 is fixedly installed on the outer side wall of the magnetic ring 7 far from the electromagnet 72. The bristles of the annular brush 8 abut against the side wall of the arc-shaped filter plate 51. A leakage groove 52 for discharging impurities is opened on the bottom wall of the air guiding area 5. The impurity particles cleaned by the annular brush 8 will be discharged from the detection pipeline 2 through the leakage groove 52, avoiding the accumulation of impurities in the detection pipeline 2 and affecting gas flow and detection results.

[0054] It should be noted that one end of the magnetic ring 7 far from the electromagnet 72 is non-magnetically set. When the electromagnet 72 is energized, the magnetic ring 7 and the opposite surface of the corresponding side electromagnet 72 have the same-pole magnetic setting. The electromagnet 72 is electrically connected to the analyzer main body 1. When the electromagnet 72 is energized, the magnetic ring 7 is pushed to slide in the detection pipeline 2 by using the principle of like poles repelling each other. By controlling the energization and de-energization of the electromagnet 72 through the analyzer main body 1, the movement of the magnetic ring 7 can be controlled, realizing gas sampling and cleaning operations on the arc-shaped filter plate 51. When the electromagnet 72 is de-energized, the elastic force of the spring 61 makes the magnetic ring 7 return to the initial position, ensuring that the device can work in a cycle. The space jointly enclosed by the magnetic ring 7, the inner cavity of the corrugated sleeve 6, and the corresponding side mounting part 13 in the initial state is hermetically set. On the one hand, the corrugated sleeve 6 can protect the electromagnet 72 from being eroded by gas and impurities, extending the service life of the electromagnet 72; on the other hand, the corrugated sleeve 6 is telescopic, can adapt to the movement of the magnetic ring 7, and at the same time maintain the tightness of the space jointly enclosed by the magnetic ring 7, the inner cavity of the corrugated sleeve 6, and the corresponding side mounting part 13.

[0055] In this embodiment, when gas sampling is required, the arc-shaped cover 3 is opened, and the analyzer main body 1 controls the electromagnet 72 to be energized. The magnetic ring 7 slides in the direction away from the electromagnet 72 under the action of the like-pole repelling magnetic force. At this time, the intake valve 91 is opened, and gas enters the conical cylinder 9. The laser passes through the light-transmitting plate 93 and interacts with the gas for detection. After the detection is completed, the electromagnet 72 is de-energized, and the spring 61 makes the magnetic ring 7 reset. The exhaust valve 92 is opened to discharge the detected gas. During the movement of the magnetic ring 7, the annular brush 8 cleans the arc-shaped filter plate 51, which will not affect the entry of gas, and this process is automatically carried out during gas sampling. Part of the impurities cleaned off directly slide down, and the other part is discharged from the leakage groove 52 under the push of the connecting slip ring 71.

[0056] It should be noted that the arc-shaped cover 3 and the setting of its opening and closing angle are such that impurities will not accumulate on it, but will automatically fall off under the action of gravity and air flow thrust.

[0057] When the analyzer main body 1 controls the electromagnet 72 to be energized, since the opposite faces of the electromagnet 72 and the magnetic ring 7 are of the same-pole magnetism after the electromagnet 72 is energized, the magnetic force of the same-pole repulsion pushes the magnetic ring 7 to move away from the electromagnet 72. When the magnetic ring 7 moves, the corrugated sleeve 6 connected to it will elongate accordingly, resulting in an increase in the internal space of the corrugated sleeve 6. According to the ideal gas state equation PV = nRT (where P is the pressure, V is the volume, n is the amount of substance, R is a constant, and T is the temperature), when the temperature and the amount of gas substance are relatively stable, as the volume V increases, the pressure P will decrease, thus forming a negative pressure environment inside the corrugated sleeve 6. The conical cylinder 9 is connected to the internal space of the corrugated sleeve 6 through a specific channel, and the intake valve 91 on the lower side of the conical cylinder 9 is a one-way valve. Since a negative pressure is formed inside the corrugated sleeve 6, and the gas in the detection pipeline 2 is in a certain pressure environment, the gas pressure in the detection pipeline 2 is higher than the pressure in the corrugated sleeve 6 and the conical cylinder 9. Under the action of the pressure difference, the gas has a tendency to flow from the high-pressure area (detection pipeline 2) to the low-pressure area (conical cylinder 9). The acting force generated by this pressure difference overcomes the opening resistance of the intake valve 91, causing the intake valve 91 to open, and the gas in the detection pipeline 2 will automatically flow into the conical cylinder 9, realizing the gas inhalation process for subsequent detection operations.

[0058] When the gas detection is completed, the analyzer main body 1 controls the electromagnet 72 to be de-energized. At this time, the spring 61 that was stretched under the magnetic force of the electromagnet 72 before plays a role. The elastic force of the spring 61 makes the magnetic ring 7 move towards the electromagnet 72, driving the corrugated sleeve 6 to return to its initial state. The internal space of the corrugated sleeve 6 shrinks. Similarly, according to the ideal gas state equation, when the temperature and the amount of gas substance remain basically unchanged, as the volume decreases, the pressure increases, resulting in an increase in the gas pressure in the corrugated sleeve 6 and the conical cylinder 9, which is higher than the gas pressure in the detection pipeline 2. The outlet valve 92 on the upper side of the conical cylinder 9 is also a one-way valve, and its opening direction is from the conical cylinder 9 to the detection pipeline 2. When the pressure in the conical cylinder 9 rises high enough to overcome the opening resistance of the outlet valve 92, the outlet valve 92 opens. Under the push of the pressure difference, the detected gas in the conical cylinder 9 will be discharged into the detection pipeline 2 through the outlet valve 92, completing the gas discharge process.

[0059] In summary, by controlling the movement of the magnetic ring 7 with the electromagnet 72, and then making the corrugated sleeve 6 expand and contract to change the internal space size, using the principle of pressure difference and the characteristics of the one-way valve, the gas is automatically and orderly introduced into and discharged from the conical cylinder 9, ensuring the smooth progress of the gas detection process and improving the accuracy and efficiency of the detection.

[0060] In the prior art, the gas to be measured is in a flowing state, and its molecules are very active. The gas molecules will continuously perform random thermal motion and move and diffuse rapidly along with the flow of the air current. This active molecular state makes it difficult for the gas to maintain a relatively stable distribution and concentration during the detection process. For example, in the case of unstable air current, local turbulence or eddy current may occur in the gas, resulting in uneven gas concentration within the detection area, thereby affecting the stability and accuracy of the detection result.

[0061] In this solution, the gas after being mixed in Example 1 is input into a relatively enclosed space (such as corrugated sleeve 6) for detection. In this relatively enclosed environment, the activity range of gas molecules is restricted, and the interaction and collision between molecules are more regular. As time goes by, the gas molecules will gradually reach a relatively balanced state and be more stable as a whole. This stable molecular state helps to improve the stability of the detection, enabling the detection instrument to capture the characteristics of the gas more accurately and reducing the detection error caused by the activity of molecules. Moreover, in Example 1, the gas has been mixed, making the gas have better uniformity before entering the enclosed space. When detecting in the enclosed space, this uniformity can be better maintained because the gas flow in the enclosed space is relatively slow and is not likely to exhibit concentration stratification or non-uniformity as easily as in the flowing state. The detection instrument can perform detection in a relatively stable and uniform gas environment, thereby improving the accuracy of the detection.

[0062] In addition, during direct sampling, the flowing state and molecular activity of the gas are relatively high, and the state of the gas may be different each time sampling is performed, resulting in poor repeatability of the detection result. Gas samples collected at different times and under different conditions may have different concentration distributions and molecular characteristics, making there be significant differences between multiple detection results and making it difficult to conduct effective comparison and analysis. In this solution, the detection is performed in a relatively enclosed space, the gas state is relatively stable, and the detection conditions are easier to control. As long as the initial conditions in the enclosed space are ensured to be the same each time detection is performed, relatively consistent detection results can be obtained, improving the repeatability of the detection process. This is very important for application scenarios that require multiple detections for comparison and analysis and can provide more reliable data support for fields such as scientific research and industrial production.

[0063] It should be noted that the specific model specifications of the micro electric cylinder 33 and the electromagnet 72 need to be selected and determined according to the actual specifications of the device, etc. The specific selection calculation method adopts the existing technology in this field, so it will not be elaborated in detail here.

[0064] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An intrinsically safe laser analyzer, comprising an analyzer main body (1) and a gas channel (10). The analyzer main body (1) includes a laser emitter (11), a laser receiver (12), and a detection pipeline (2). A side flange pipeline (101) is provided on the gas channel (10). One ends of the laser emitter (11) and the laser receiver (12) are respectively provided with mounting parts (13), and are connected to the side flange pipeline (101) through the mounting parts (13). An optical window is provided inside the mounting parts (13). The detection pipeline (2) is inserted and installed on the gas channel (10) through the port of the side flange pipeline (101). The detection pipeline (2) is located between the two mounting parts (13) and its end is flush with the flange end of the mounting parts (13). An air guide port for gas to pass through is formed through the detection pipeline (2) located inside the gas channel (10). Baffles are provided at both ends of the detection pipeline (2), and it is characterized in that, Further comprising: Air guiding and regulating assembly: The air guiding and regulating assembly is arranged on the detection pipeline (2) and is located on the upper and lower sides of the air guiding port; the air guiding and regulating assembly includes an arc-shaped baffle (3), an elastic windscreen cloth (4), a driving device, and a first installation groove (21) and a second installation groove (22) formed in the detection pipeline (2). A gas guiding area (5) is formed in the middle position of the detection pipeline (2). The gas guiding area (5) is recessed towards the inner side of the detection pipeline (2), and its inner end is not communicated with the inner cavity of the detection pipeline (2). One end of the arc-shaped baffle (3) is provided with a connecting plate (31). A connecting rod (32) is fixedly connected to the connecting plate (31). A gear (321) is fixedly connected to the connecting rod (32) located outside the connecting plate (31). The two ends of the gear (321) are respectively rotatably clamped in the side walls of the first installation groove (21). A driving device for controlling the rotation of the arc-shaped baffle (3) is arranged on the detection pipeline (2). One end of the elastic windscreen cloth (4) is fixed to one side of the arc-shaped baffle (3) facing the air inlet end of the air guiding port, and the other end is fixed to the side wall of the gas guiding area (5) at the air inlet end of the air guiding port. Sampling and cleaning assembly: The sampling and cleaning assembly is arranged in the detection pipeline (2) and is distributed on the left and right sides of the air guiding port.

2. The intrinsically safe laser analyzer according to claim 1, characterized in that, A clamping block is provided on one side of the baffle away from the air guiding port. A clamping groove matching the clamping block is provided at the flange end of the installation part (13). The opening direction of the air guiding port is the same as the gas flow direction.

3. The intrinsically safe laser analyzer according to claim 1, characterized in that, The number of the arc-shaped baffle (3), the elastic windscreen cloth (4), and the micro electric cylinder (33) is two. The two arc-shaped baffles (3) are distributed on the upper and lower sides of the air guiding port in a centrosymmetric manner along the geometric center of the detection pipeline (2). One ends of the two elastic windscreen cloths (4) away from the arc-shaped baffle (3) are respectively distributed on the upper and lower sides of the air inlet end of the air guiding port. An arc-shaped filter plate (51) is installed at the air guiding port.

4. The intrinsically safe laser analyzer according to claim 1, wherein, The driving device includes a micro electric cylinder (33) and a rack (322). The micro electric cylinder (33) is fixedly installed in the second installation groove (22). The output end of the micro electric cylinder (33) is fixedly connected to one end of the rack (322). A through hole matching the output end of the micro electric cylinder (33) and a sliding groove for limiting the rack (322) are provided between the first installation groove (21) and the second installation groove (22). The gear (321) is meshed with the rack (322). The micro electric cylinder (33) and the gear (321) are both inside the outer side wall of the detection pipeline (2). The micro electric cylinder (33) is electrically connected to the analyzer main body (1).

5. An intrinsically safe laser analyzer according to claim 1, characterized in that, When the two arc-shaped baffles (3) are buckled, their outer surfaces are coaxial with the outer wall of the detection pipeline (2) and can completely block the air guiding port. When the two arc-shaped baffles (3) are separated, the elastic windscreen cloth (4) is in an inclined state.

6. The intrinsically safe laser analyzer according to claim 1, characterized in that, The elastic windscreen cloth (4) is a thermoplastic polyurethane elastomer film.

7. An intrinsically safe laser analyzer according to claim 1, characterized in that, The sampling and cleaning assembly includes a corrugated sleeve (6), a magnetic ring (7), an annular brush (8) and an electromagnet (72). A connecting slip ring (71) is provided on the outer side of the magnetic ring (7). The magnetic ring (7) is slidably and sealingly connected to the inner wall of the detection pipeline (2) through the connecting slip ring (71). One ends of the electromagnet (72) and the corrugated sleeve (6) are both fixed on the baffle. The corrugated sleeve (6) is sleeved on the outer side of the electromagnet (72). One side of the electromagnet (72) is fixedly connected with a spring (61). The ends of the corrugated sleeve (6) and the spring (61) away from the baffle are both fixed to one side of the magnetic ring (7). A conical cylinder (9) is recessed in the middle of the magnetic ring (7). A sealing groove (94) is provided at one end of the conical cylinder (9) facing the electromagnet (72). A light-transmitting plate (93) is snap-fitted and installed in the sealing groove (94).

8. The intrinsically safe laser analyzer according to claim 7, characterized in that, An air outlet valve (92) is provided on the upper side of the conical cylinder (9), and an air inlet valve (91) is provided on the lower side of the conical cylinder (9). Both the air inlet valve (91) and the air outlet valve (92) are one-way valves. The light-transmitting plate (93) matches the laser path. The air outlet valve (92) and the air inlet valve (91) are respectively located on the upper and lower sides of the light-transmitting plate (93). The electromagnet (72) and the baffle are provided with holes matching the laser path.

9. An intrinsically safe laser analyzer according to claim 7, characterized in that, An annular brush (8) is fixedly installed on the outer side wall of the magnetic ring (7) away from the electromagnet (72). The bristles of the annular brush (8) abut against the side wall of the arc-shaped filter plate (51). A leakage groove (52) for discharging impurities is provided on the bottom wall of the air guiding area (5).

10. An intrinsically safe laser analyzer according to claim 7, characterized in that, One end of the magnetic ring (7) away from the electromagnet (72) is non-magnetic. When the electromagnet (72) is energized, the magnetic poles of the opposite faces of the magnetic ring (7) and the electromagnet (72) on its corresponding side are of the same polarity. The electromagnet (72) is electrically connected to the analyzer main body (1). The space jointly enclosed by the magnetic ring (7), the inner cavity of the corrugated sleeve (6) and the corresponding installation part (13) in the initial state is sealed.

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