A laser method gas concentration analyzer

Abstract

The application discloses a kind of laser method gas concentration analyzers, it is related to gas monitoring technical field, including analyzer body and the control panel of fixed in the front surface of analyzer body, further including protective cover, its front end opening, and cover set in the outside of the analyzer body, the insertion slot for the edge of control panel insertion is vertically opened in the both sides of the protective cover, check anti-escape component, its elasticity is installed in insertion slot and is matched with the clamping of control panel, normally prevent the analyzer body from moving upwards, release lifting assembly, it is installed in protective cover and is used to carry the analyzer body.The application is protected by setting the protective cover outside the analyzer body, the insertion slot is opened in the both sides of protective cover for the edge of control panel insertion, in normal state, the clamping cooperation between check anti-escape component and control panel reliably locks the analyzer body in protective cover, prevents it from accidentally escaping, when needing maintenance, directly operating release lifting assembly.

Description

Technical Field

[0001] This invention relates to the field of gas monitoring technology, specifically to a laser-based gas concentration analyzer. Background Technology

[0002] A laser gas analyzer is a detection device that uses laser technology to measure gas concentration with high precision. It is widely used in industry, environmental protection, and medical fields. Its core principle is to calculate concentration by utilizing the absorption characteristics of gas molecules to specific wavelengths of laser light or the photoacoustic effect. Most laser gas analyzers on the market employ Tunable Diode Laser Absorption Spectroscopy (TDLAS) technology. TDLAS technology is essentially a spectral absorption technique that utilizes the narrow linewidth and tunable characteristics of semiconductor lasers. It obtains gas concentration information by measuring single absorption lines in the characteristic absorption spectrum of the gas being tested. Unlike traditional infrared spectral absorption technology, the spectral width of a semiconductor laser is much smaller than the broadening of gas absorption lines, thus providing excellent measurement selectivity.

[0003] The existing patent application, with publication number CN118759127A and publication date October 11, 2024, is titled "A Portable Gas Analyzer." This patent includes an analyzer body and a base plate. Two symmetrically arranged L-shaped plates are fixedly connected to the top of the base plate, and mounting rings are fixedly connected to the opposite side walls of the two L-shaped plates. A universal ball is installed within the mounting ring, and a first connecting rod is fixedly connected to the bottom of the universal ball. This portable gas analyzer, when moved, can cause a telescopic cover to unfold upwards and surround the analyzer body, providing excellent protection and preventing collisions during movement, thus ensuring its effectiveness and lifespan. Simultaneously, the telescopic cover can retract and return to its original position, exposing the analyzer body for normal use. During use, it facilitates automatic leveling and limiting of the analyzer body and provides excellent shock absorption, ensuring detection effectiveness and service life.

[0004] The aforementioned application has shortcomings. To protect the analyzer body, especially the delicate control panel, from damage caused by dust, moisture, oil, and accidental impacts in the field environment, a protective cover is usually installed on the outside of the analyzer. Existing protective methods are mostly simple cover structures, which are fixed to the analyzer by bolts or clips. Although this method can provide a certain degree of protection, when it is necessary to maintain, calibrate, or operate the control panel, maintenance personnel need to use tools to remove the fasteners of the protective cover first. The whole process is cumbersome and time-consuming. Moreover, operators usually have to unlock the cover first and then manually remove the analyzer body from the protective cover. This process is not smooth enough, especially in installation locations with narrow spaces or poor lighting. Simple clips or bolts may loosen under long-term vibration, resulting in gaps between the protective cover and the analyzer body, thus weakening its protective effect. Summary of the Invention

[0005] The purpose of this invention is to provide a laser-based gas concentration analyzer to address the shortcomings of the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A laser-based gas concentration analyzer includes an analyzer body and a control panel fixed to the front surface of the analyzer body. It also includes a protective cover with an open front end, fitted over the analyzer body. The protective cover has vertically formed insertion slots on both sides for the edge of the control panel to be inserted. A backlash prevention component is elastically installed in the insertion slots and engages with the control panel, preventing the analyzer body from moving upwards under normal conditions. A release lifting component is installed inside the protective cover and supports the analyzer body. An abutment frame is movably installed inside the protective cover, abutting against the release lifting component and the backlash prevention component. When the release lifting component is raised, an operating part pushes the abutment frame to disengage the backlash prevention component from the control panel, thereby unlocking and raising the analyzer body.

[0008] Preferably, a sunshade is attached to the top of the protective cover, and hanging brackets are symmetrically fixed to both sides of the bottom of the sunshade. Grooves adapted to the hanging brackets are opened on both sides of the analyzer body.

[0009] Preferably, the anti-reverse and anti-detachment assembly includes a wedge-shaped insert rod that is installed through the protective cover, a pair of anti-reverse racks are embedded on the back of the control panel, one end of the wedge-shaped insert rod is engaged with the anti-reverse racks, and a top spring is installed between the other end of the wedge-shaped insert rod and the protective cover.

[0010] Preferably, the release lifting assembly includes two crossbars slidably mounted on the bottom of the inner wall of the protective cover, a bidirectional screw threaded through the two crossbars, and a pair of scissor-type support brackets hinged to the top of the two crossbars, with the two scissor-type support brackets slidably connected to both sides of the inner wall of the protective cover respectively.

[0011] Preferably, one end of the bidirectional screw is rotatably connected to the inner wall of the protective cover, and the other end is fixedly connected to a connecting rod. The connecting rod passes through the abutment frame and is movably sleeved with an adjusting end cover. A guide key is fixedly connected inside the adjusting end cover. A keyway for the guide key to move is horizontally opened on the outer side of the connecting rod. One side of the abutment frame contacts the adjusting end cover, and the other side contacts the wedge-shaped insert.

[0012] Preferably, a pair of pull rods that overlap with the abutment frame are fixedly connected to the crossbar near the opening of the protective cover. When the release lifting assembly is raised, the pull rods pull the abutment frame to unlock the anti-reverse and anti-detachment assembly.

[0013] Preferably, the protective cover has heat dissipation windows on both sides, and a dustproof net is movably inserted outside the heat dissipation window.

[0014] Preferably, one end of the wedge-shaped insert is rotatably connected to a push rod, the end of the push rod is fixedly connected to a snap-fit ​​cam inside the heat dissipation window, and the dustproof mesh is provided with a slot for the snap-fit ​​cam to enter.

[0015] Preferably, the inner wall of the protective cover is vertically provided with a sliding groove that matches the bracket, and the inner wall of the bracket is vertically installed with a buffer pad that contacts the side of the analyzer body.

[0016] Preferably, a pair of handles are installed on both the front surface of the control panel and the top surface of the sun visor.

[0017] In the above technical solution, the analyzer body is protected by a protective cover. The cover has slots on both sides for the control panel to be inserted. Under normal conditions, the analyzer body is reliably locked inside the cover by the locking mechanism between the anti-reverse and anti-detachment components, preventing accidental dislodgement. When maintenance is required, the lifting mechanism is directly operated. This action, via the abutment bracket, forces the anti-reverse and anti-detachment components to release the locking mechanism from the control panel. Simultaneously, the lifting force pushes the analyzer body upwards, exposing the control panel portion of the cover for easy removal by the operator. Under normal conditions, the anti-reverse and anti-detachment components provide continuous locking force through elasticity, ensuring the analyzer body's stability within the cover and effectively resisting vibration and impact, providing superior protection. During maintenance, the operator only needs to trigger the lifting mechanism to simultaneously complete both unlocking and lifting actions, safely pushing the analyzer body out of the cover. No tools or fasteners are required throughout the process, greatly simplifying the maintenance procedure.

[0018] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0019] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0021] Figure 1 This is a schematic diagram of the overall structure of a laser-based gas concentration analyzer according to the present invention;

[0022] Figure 2 This is a schematic diagram of the internal structure of the protective cover in a laser-based gas concentration analyzer according to the present invention;

[0023] Figure 3 This is a schematic diagram of the release lifting component and the analyzer body in a laser gas concentration analyzer according to the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the sunshade and the analyzer body in a laser-based gas concentration analyzer according to the present invention;

[0025] Figure 5 This is a schematic diagram showing the connection between the protective cover and the anti-reverse and anti-detachment component in a laser-based gas concentration analyzer according to the present invention.

[0026] Figure 6 This is a schematic diagram of the release lifting assembly in a laser-based gas concentration analyzer according to the present invention;

[0027] Figure 7 This is a schematic diagram showing the connection between the adjusting end cap and the connecting rod in a laser-based gas concentration analyzer according to the present invention.

[0028] Figure 8 This is a schematic diagram of the transmission of the check valve and dustproof mesh in a laser gas concentration analyzer according to the present invention.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Analyzer body; 101. Groove; 2. Control panel; 201. Check rack; 3. Protective cover; 301. Insertion slot; 302. Heat dissipation window; 303. Slide groove; 4. Check and anti-detachment assembly; 401. Wedge rod; 402. Top spring; 403. Push rod; 404. Snap-fit ​​cam; 5. Release lifting assembly; 501. Crossbar; 502. Two-way screw; 503. Scissor-type support frame; 504. Connecting rod; 505. Adjustment end cover; 506. Guide key; 507. Keyway; 508. Pull rod; 509. Return spring; 510. Slider; 6. Abutment frame; 7. Sunshade; 701. Hanger; 702. Buffer pad; 8. Dustproof net; 801. Slot; 9. Handle. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0032] Please see Figure 1-8 This invention provides a laser-based gas concentration analyzer, comprising an analyzer body 1 and a control panel 2 fixed to the front surface of the analyzer body 1, and a protective cover 3 with an open front end, fitted over the analyzer body 1. The protective cover 3 has vertically formed insertion slots 301 on both sides for inserting the edges of the control panel 2. A backlash prevention component 4 is elastically installed within the insertion slots 301 and engages with the control panel 2, preventing the analyzer body 1 from moving upward under normal conditions. A release lifting component 5 is installed within the protective cover 3 and serves to support the analyzer body 1. An abutment frame 6 is movably installed within the protective cover 3, abutting against the release lifting component 5 and the backlash prevention component 4 respectively. When the release lifting component 5 is lifted, the operating part pushes the abutment frame 6 to disengage the backlash prevention component 4 from the control panel 2, thereby unlocking and lifting the analyzer body 1.

[0033] Specifically, the analyzer body 1 is the core measurement unit of the system, designed based on tunable semiconductor laser absorption spectroscopy technology. A control panel 2 is fixed to the front surface of the analyzer body 1, used to display measurement data, system status, and operating interfaces. The analyzer body 1 mainly includes a laser emission module, an absorption gas chamber, a photoelectric detection module, an integrated preprocessing unit, and a control and display unit. The laser emission module uses a tunable semiconductor laser to generate a laser beam of a specific wavelength. The absorption gas chamber is made of corrosion-resistant material, and the interaction path between the laser and the gas is extended through optimized optical path design to improve detection sensitivity. The photoelectric detection module monitors the intensity attenuation of the laser after it passes through the gas in real time, converting the optical signal into an electrical signal. The integrated preprocessing unit includes a precision filter and a constant temperature heating system to ensure the sample gas is pure and free of condensation. The control and display unit uses a PLC to achieve automated operation, real-time data display, and fault alarms. All components work together... The same operation enables the analyzer to have high precision, anti-interference and fast response capabilities, and is suitable for complex industrial environments such as high temperature and high dust. In order to protect the analyzer from the effects of dust, moisture and mechanical impact in harsh industrial environments, this embodiment adds a protective cover 3. Its internal dimensions match the analyzer body 1 and can be completely fitted outside the analyzer body 1. The protective cover 3 has vertical insertion slots 301 on both sides of its side walls. Its width is slightly larger than the edge thickness of the control panel 2, so that the edge of the control panel 2 can be inserted into the insertion slots 301 to achieve initial positioning. Under normal conditions, the analyzer body 1 is completely contained in the protective cover 3. The anti-return and anti-detachment component 4 is kept in a locked state under the action of the spring, locking the control panel 2 in the insertion slots 301. At this time, the analyzer body 1 can perform gas concentration measurement normally. The sample gas enters the pre-processing unit of the analyzer body 1 through the sampling probe and the heating pipeline, and enters the measuring gas chamber after filtering. The laser emits a laser beam of a specific wavelength, which is absorbed and attenuated when passing through the gas. The detector detects the change in light intensity and calculates the gas concentration using the Lambert-Beer law. The entire process is controlled by a PLC, automatically performing functions such as calibration and alarms. When maintenance is required, the maintenance personnel trigger the operating part of the release lifting assembly 5. The pushing force of the release lifting assembly 5 is transmitted to the anti-return and anti-detachment assembly 4 through the abutment frame 6, forcing it to disengage from the control panel 2. At the same time, the release lifting assembly 5 continues to lift the bottom of the analyzer body 1, pushing it upwards and partially exposing the control panel 2. The maintenance personnel can then easily grasp the control panel 2 and completely remove the analyzer body 1. For reset, simply reinsert the analyzer body 1 into the protective cover 3, and the anti-return and anti-detachment assembly 4 automatically resets and locks in place, requiring no additional tools. This mechanism ensures the reliability of the analyzer in high-temperature and high-dust environments while simplifying the maintenance process. No loosening of fasteners is required throughout the process, reducing the risk of human error.

[0034] Compared with the prior art, the present invention protects the analyzer body 1 by setting a protective cover 3 outside the analyzer body 1. The protective cover 3 has insertion slots 301 on both sides for the edge of the control panel 2 to be inserted. Under normal conditions, the analyzer body 1 is reliably locked in the protective cover 3 by the snap-fit ​​between the anti-return component 4 and the control panel 2, preventing it from accidentally falling out. When maintenance is required, the release lifting component 5 is operated directly. On the one hand, the force is transmitted to the anti-return component 4 through the abutment frame 6, forcing it to release the snap-fit ​​with the control panel 2. On the other hand, the lifting force will lift the analyzer body 1 upward a distance, so that part of the control panel 2 is exposed in the protective cover 3, making it easy for the operator to remove. Under normal conditions, the anti-return component 4 provides a continuous locking force under the action of elasticity, ensuring the stability of the analyzer body 1 in the protective cover 3, effectively resisting vibration and impact, and providing excellent protection. During maintenance, the maintenance personnel only need to trigger the operating part of the release lifting component 5 to complete the unlocking and lifting actions at the same time, safely pushing the analyzer body 1 out of the protective cover 3. No tools or fasteners are required throughout the process, greatly simplifying the maintenance process.

[0035] In a further embodiment of the present invention, a sunshade 7 is attached to the top of the protective cover 3, and a bracket 701 is symmetrically fixedly connected to both sides of the bottom of the sunshade 7. The analyzer body 1 has grooves 101 on both sides that are adapted to the brackets 701. Specifically, the planar area of ​​the sunshade 7 is larger than the top opening of the protective cover 3. The bracket 701 is an L-shaped metal component, with its vertical section fixedly connected to the bottom of the sunshade 7, and its horizontal section forming a cantilever. The horizontal section is inserted into the groove 101 on the analyzer body 1, enabling quick installation and removal of the sunshade 7. When the analyzer body 1 is lifted by the release lifting component 5, the anti-reverse anti-detachment component 4 can be unlocked. Next, lift the sunshade 7 and move it out along with the analyzer body 1. Under normal working conditions, the sunshade 7 is stably attached to the top of the protective cover 3 through the cooperation of the bracket 701 and the groove 101 on the analyzer body 1. Its sunshade surface can effectively block sunlight and rain, and prevent the analyzer body 1 from overheating due to direct sunlight or rainwater accumulation from affecting the visibility of the operating interface, thereby improving the applicability and display clarity of the equipment in outdoor environments. The matching design of the bracket and the groove 101 constitutes a locking structure. As long as the anti-reverse anti-detachment component 4 is functioning properly, the sunshade 7 cannot easily fall off the protective cover 3, ensuring comprehensive protection.

[0036] In a further embodiment of the present invention, the anti-reverse and anti-detachment assembly 4 includes a wedge-shaped insert 401 that penetrates and is installed inside the protective cover 3. A pair of anti-reverse racks 201 are embedded on the back of the control panel 2. One end of the wedge-shaped insert 401 engages with the anti-reverse rack 201, and a top spring 402 is installed between the other end of the wedge-shaped insert 401 and the protective cover 3. Specifically, the anti-reverse rack 201 has a one-way anti-reverse characteristic, that is, the bottom surface of the tooth is a horizontal plane and the top surface is a smooth inclined plane. The top spring 402 continuously provides a pressing force to the wedge-shaped insert 401 in the direction of the anti-reverse rack 201, so that the wedge head is tightly engaged in the tooth groove of the anti-reverse rack 201 under normal conditions, forming a mechanical interlock. When the analyzer body 1 is subjected to When the external force pushes the analyzer body 1 upward, the horizontal surface of the wedge-shaped insert 401 will rigidly collide with the check rack 201, thereby effectively locking the upward movement of the analyzer body 1 and preventing it from accidentally coming out. Conversely, when the analyzer body 1 needs to be placed downward into the protective cover 3, the wedge-shaped head inclined surface of the wedge-shaped insert 401 contacts the tooth inclined surface of the check rack 201. Under the action of the downward force component, it overcomes part of the force of the top spring 402, causing the wedge-shaped insert 401 to be pushed back and slide through the tooth groove, achieving smooth placement and locking tooth by tooth until the analyzer body 1 falls on the release lifting assembly 5. When the maintenance personnel operate the release lifting assembly 5, they can push the abutment frame 6 through the release lifting assembly 5. The force received is transmitted to the tail of the wedge-shaped insert 401, pushing the wedge-shaped insert 401 to overcome the clamping force of the top spring 402 and retract independently. This action causes the wedge head to completely disengage from the tooth groove of the check rack 201, releasing the mechanical interlock. At this time, continue to adjust and release the lifting assembly 5, and directly lift the bottom of the analyzer body 1 through its lifting adjustment, safely lifting it upwards for a predetermined stroke, so that the analyzer body 1 and the control panel 2 are exposed under the protective cover 3, making it easy for maintenance personnel to grab. The whole process is smooth and efficient.

[0037] In a further embodiment of the present invention, the release lifting assembly 5 includes two crossbars 501 slidably mounted on the bottom of the inner wall of the protective cover 3. A bidirectional screw 502 is threaded through the two crossbars 501. A pair of scissor-type support brackets 503 are hinged to the top of the two crossbars 501. The two scissor-type support brackets 503 are slidably connected to both sides of the inner wall of the protective cover 3. The bottom ends of the scissor-type support brackets 503 are respectively connected to the top of the two crossbars 501 via hinge shafts. A slider 510 is mounted on the top of each scissor-type support bracket 503. A groove 303 for the slider to move is vertically opened on the inner side wall of the protective cover 3. Specifically, in the locked and standby states, the bidirectional screw 502 does not rotate, and the two crossbars 501 remain stationary under the thread constraint of the bidirectional screw 502, stably supporting the crossbars. At this time, the pressure of the top spring 402 causes the wedge-shaped insert 401 of the anti-return and anti-detachment assembly 4 to be tightly engaged in the anti-return rack 201 on the back of the control panel 2, reliably locking the analyzer body 1 inside the protective cover 3. The maintenance personnel can press the operating part of the bidirectional screw 502 to unlock the anti-return and anti-detachment assembly 4, and then rotate the bidirectional screw 502. The rotational motion of the bidirectional screw 502 is converted into the opposing linear motion of the two crossbars 501 through the threaded pair. Since the bottom of the scissor-type support bracket 503 is hinged to the crossbar 501 and the top is restricted by the vertical slide groove 303 on the inner wall of the protective cover 3, the horizontal movement of the crossbar 501 will force the scissor-type support bracket 503 to unfold around the hinge point in the middle, thereby generating a strong vertical lifting force to smoothly lift the analyzer body 1 upward.

[0038] In a further embodiment of the present invention, one end of the bidirectional screw 502 is rotatably connected to the inner wall of the protective cover 3, and the other end is fixedly connected to a connecting rod 504. The connecting rod 504 passes through the abutment frame 6 and is movably sleeved with an adjusting end cover 505. A guide key 506 is fixedly connected inside the adjusting end cover 505. A keyway 507 for the guide key 506 to move is horizontally opened on the outer side of the connecting rod 504. One side of the abutment frame 6 contacts the adjusting end cover 505, and the other side contacts the wedge-shaped insert 401. A return spring 509 is sleeved on the connecting rod 504. The two ends of the return spring 509 contact the bidirectional screw 502 and the abutment frame 6 respectively. Specifically, the keyway 507 allows the guide key 506 to slide axially inside it, but at the same time restricts the circumferential relative rotation between the connecting rod 504 and the adjusting end cover 505. In the initial locked state, the bidirectional screw 502 is not operated, and the connecting rod 504 is stationary. At this time, the abutment frame 6 is in a natural state with the adjusting end cover 505. 5. Contact is made, but no force sufficient to overcome the pressure of the top spring 402 is applied to the wedge-shaped insert 401. The anti-return and anti-detachment assembly 4 remains locked. When the first pressing operation is performed, the axial pressure acting on the adjusting end cover 505 is directly converted into the axial displacement of the abutment frame 6. At this stage, the relative sliding of the keyway 507 and the guide key 506 provides a pure axial free stroke, ensuring that the pressure is fully used to push the abutment frame 6 and compress the top spring 402 of the anti-return and anti-detachment assembly 4, thereby reliably unlocking and avoiding complex linkage starting torque. The operating force is intuitive and controllable. In the second rotation operation, since the unlocking has been completed, the upward mechanical constraint of the analyzer body 1 has been released. At this time, the adjusting end cover 505 is rotated, and the power is directly transmitted to the bidirectional screw 502 through the keyway 507. The bidirectional screw 502 rotates and drives the two crossbars 501 to move closer to each other, thereby controlling the unfolding angle of the scissor-type support frame 503, thereby smoothly lifting the analyzer body 1. Because the unlocking and lifting processes are separate, the lifting process only needs to overcome the gravity of the analyzer body 1 and the friction of the mechanism, without having to overcome the locking spring force at the same time. This makes height adjustment easier and more precise. The two-step method of pressing to unlock and then rotating to lift is logically clear, greatly reducing the possibility of misoperation and making the adjustment of the lifting force more precise. It is particularly beneficial for use in scenarios where precise control of the exposed space is required for maintenance. The entire mechanism works in concert, significantly improving the convenience and safety of maintenance while ensuring the reliability of locking.

[0039] In a further embodiment of the present invention, a pair of pull rods 508 that overlap with the abutment frame 6 are fixedly connected to the crossbar 501 near the opening of the protective cover 3. The abutment frame 6 has a through hole for the pull rods 508 to pass through. When the lifting assembly 5 is released and raised, the pull rods 508 pull the abutment frame 6 to unlock the anti-return and anti-detachment assembly 4. Specifically, the end of the pull rod 508 passes through the through hole and overlaps with the abutment frame 6. This overlap has a certain initial gap or pre-stroke to ensure that during the initial stage of the lifting action, the pull rods 508 will not immediately forcefully pull the abutment frame 6. When pressed When the adjusting end cap 505 is unlocked to release the anti-return and anti-detachment assembly 4, rotating the adjusting end cap 505 causes the two crossbars 501 to begin moving closer together. In the initial stage, the movement of the crossbars 501 is first used to adjust the scissor-type support frame 503 and begin to lift the analyzer body 1. At the same time, the pull rod 508 fixed on the crossbars 501 moves accordingly, gradually eliminating the initial gap between its end and the abutment frame 6. As the crossbars 501 continue to move, the pull rod 508 applies a pulling force to the abutment frame 6 in the direction of inward movement towards the protective cover 3. Under the action of this force, the abutment frame 6 is displaced. The wedge-shaped inserts 401 on both sides are pressed against the top spring 402, forcing the wedge-shaped inserts 401 to retract inward, thereby releasing their engagement with the check rack 201 and achieving mechanical unlocking. Simultaneously with the unlocking action triggered by the pull rod 508, the adjusting end cover 505 can be rotated independently without pushing it inward, allowing the scissor-type support bracket 503 to continue unfolding under the drive of the crossbar 501, providing an upward lifting force for the unlocked analyzer body 1. Since unlocking is automatically triggered by the lifting process, the analyzer body 1 experiences a moment of release from lock. The gas analyzer body 1 is then smoothly lifted, revealing the opening of the protective cover 3 on the control panel 2, facilitating operation by maintenance personnel. This design ensures that the unlocking and lifting actions are seamlessly connected and completed automatically. Maintenance personnel only need to perform one operation afterward, and the system will automatically lift the gas analyzer body 1 in the correct sequence with the anti-reverse check component 4 unlocked. This eliminates the need for step-by-step operations, greatly simplifying the process, improving maintenance efficiency, and preventing equipment damage that may be caused by forgetting to unlock. The entire mechanism is reliable and well-suited for use in industrial sites requiring frequent maintenance.

[0040] In a further embodiment of the present invention, heat dissipation windows 302 are provided on both sides of the protective cover 3, and a dustproof net 8 is movably inserted outside the heat dissipation windows 302. Specifically, a guide rail frame is provided on the outer wall of the protective cover 3 around the heat dissipation windows 302, and the dustproof net 8 can be inserted into the guide rail frame in a horizontal direction to completely cover the heat dissipation windows 302 and fix it in place. This movable insertion design allows the dustproof net 8 to be easily pulled out for cleaning or replacement. The dustproof net 8 blocks pollutants outside the protective cover 3, avoiding the accumulation of dust inside the protective cover 3 or in the grooves of the heat dissipation windows 302, greatly simplifying the cleaning work. Secondly, the external installation facilitates intuitive inspection of the dirt and clogging of the dustproof net 8. Maintenance personnel can directly pull out the dustproof net 8 for cleaning or replacement without opening the protective cover 3, making maintenance simple and quick.

[0041] In a further embodiment of the present invention, a push rod 403 is rotatably connected to one end of the wedge-shaped insert 401, and a snap-fit ​​cam 404 is fixedly connected to the end of the push rod 403 within the heat dissipation window 302. A slot 801 for the snap-fit ​​cam 404 to enter is provided on the dustproof mesh 8. Specifically, when the analyzer body 1 is placed into the protective cover 3 and moves downwards, the check rack 201 on the back of the control panel 2 interacts with the inclined surface of the wedge-shaped insert 401. During the downward movement of the analyzer body 1 under gravity, the inclined surface of the check rack 201 continuously pushes the inclined surface of the wedge-shaped insert 401, forcing the wedge-shaped insert 401 to perform a horizontal reciprocating motion. This reciprocating motion is transmitted to the snap-fit ​​cam 404 through the push rod 403, causing the snap-fit ​​cam 404 to... 4 drives the dustproof net 8 to move back and forth periodically, thereby generating high-frequency micro-vibration of the entire dustproof net 8. This high-frequency micro-vibration can effectively shake off the dust particles attached to the surface of the dustproof net 8, preventing dust from clogging the mesh. The dust cleaning action is automatically completed during the pressing down of the analyzer body 1, without additional operation or energy consumption. After the analyzer body 1 is fully installed, the cherry-shaped plug is firmly engaged with the check rack 201 under the action of the top spring 402. At the same time, the engaging cam 404 and the slot 801 form a fixed engagement, ensuring that the dustproof net 8 remains stable during equipment operation. It converts the mechanical movement of equipment installation into self-cleaning power, which is particularly suitable for long-term stable operation in high dust environments and effectively solves the maintenance problem of easy clogging of the dustproof net 8.

[0042] In a further embodiment of the present invention, the inner wall of the protective cover 3 is vertically provided with a sliding groove 303 that matches the bracket 701. The inner wall of the bracket 701 is vertically installed with a buffer pad 702 that contacts the side of the analyzer body 1. Specifically, during the entire movement of the analyzer body 1, the buffer pad 702 maintains contact with the side of the analyzer body 1 through its elasticity. By utilizing the damping characteristics of the material itself, it absorbs and dissipates the small vibration energy that may be generated by the movement, making the movement more stable. Secondly, when the analyzer body 1 descends to the lowest point or moves to the end of its stroke, the buffer pad 702 can effectively buffer the possible impact force, avoiding rigid collision and friction between the metal shell of the analyzer body 1 and the bracket 701, thereby protecting the paint surface of the analyzer body 1 and the internal precision components from damage. At the same time, after the anti-return and anti-detachment component 4 is unlocked, the sunshade 7 can be lifted directly to allow the bracket 701 to stably lift the analyzer body 1 from inside the protective cover 3 along the sliding groove 303.

[0043] In a further embodiment of the present invention, a pair of handles 9 are installed on the front surface of the control panel 2 and the top surface of the sun visor 7. Specifically, when maintenance is required, the operator can first hold the handles 9 on the control panel 2 to perform fine operations or inspections. When a larger range of movement and lifting is required, the handles 9 on the sun visor 7 can be used instead. This hierarchical operation design allows maintenance personnel to select the appropriate force application point according to actual needs.

[0044] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A laser-based gas concentration analyzer, comprising an analyzer body (1) and a control panel (2) fixed to the front surface of the analyzer body (1), characterized in that, Also includes: The protective cover (3) has an opening at its front end and is fitted onto the outside of the analyzer body (1). Both sides of the protective cover (3) are vertically provided with insertion slots (301) for the edge of the control panel (2) to be inserted. The anti-reverse and anti-detachment component (4) is elastically installed in the insertion slot (301) and snapped into the control panel (2), which normally prevents the analyzer body (1) from moving upward; Release lifting assembly (5), which is installed inside the protective cover (3) and is used to support the analyzer body (1). Inside the protective cover (3), there is a contact frame (6) that abuts against the release lifting assembly (5) and the anti-return and anti-detachment assembly (4). When the release lifting assembly (5) is lifted, the operating part pushes the abutment frame (6) to disengage the anti-return and anti-detachment assembly (4) from the control panel (2), thereby unlocking and lifting the analyzer body (1); The anti-return and anti-detachment assembly (4) includes a wedge-shaped insert (401) installed through the protective cover (3). A pair of anti-return racks (201) are embedded on the back of the control panel (2). One end of the wedge-shaped insert (401) is engaged with the anti-return rack (201). A top spring (402) is installed between the other end of the wedge-shaped insert (401) and the protective cover (3). The release and lifting assembly (5) includes two horizontal bars (501) slidably installed at the bottom of the inner wall of the protective cover (3). A double-acting screw (502) is threaded through the two horizontal bars (501). A pair of scissor-type support brackets (503) are hinged to the top of the two horizontal bars (501). The two scissor-type support brackets (503) are slidably connected to both sides of the inner wall of the protective cover (3). The double-acting screw (502) One end is rotatably connected to the inner wall of the protective cover (3), and the other end is fixedly connected to a connecting rod (504). The connecting rod (504) passes through the abutment frame (6) and is movably sleeved with an adjusting end cap (505). A guide key (506) is fixedly connected inside the adjusting end cap (505). A keyway (507) for the guide key (506) to move is horizontally opened on the outside of the connecting rod (504). One side of the abutment frame (6) is in contact with the adjusting end cap (505), and the other side is in contact with the wedge-shaped insert (401). A pair of pull rods (508) that overlap with the abutment frame (6) are fixedly connected to the crossbar (501) near the opening of the protective cover (3). When the release lifting assembly (5) is raised, the pull rod (508) pulls the abutment frame (6) to unlock the anti-return and anti-detachment assembly (4).

2. The laser-based gas concentration analyzer according to claim 1, characterized in that, The protective cover (3) has a sunshade (7) attached to the top. The sunshade (7) has a bracket (701) symmetrically fixed on both sides of its bottom. The analyzer body (1) has grooves (101) on both sides that are compatible with the bracket (701).

3. The laser-based gas concentration analyzer according to claim 1, characterized in that, The protective cover (3) has heat dissipation windows (302) on both sides, and a dustproof net (8) is inserted into the outside of the heat dissipation window (302).

4. A laser-based gas concentration analyzer according to claim 3, characterized in that, One end of the wedge-shaped insert (401) is rotatably connected to a push rod (403), and the end of the push rod (403) is fixedly connected to a snap-fit ​​cam (404) inside the heat dissipation window (302). The dustproof net (8) has a slot (801) for the snap-fit ​​cam (404) to enter.

5. A laser-based gas concentration analyzer according to claim 2, characterized in that, The inner wall of the protective cover (3) is vertically provided with a sliding groove (303) that matches the bracket (701), and the inner wall of the bracket (701) is vertically provided with a buffer pad (702) that contacts the side of the analyzer body (1).

6. A laser-based gas concentration analyzer according to claim 2, characterized in that, A pair of handles (9) are installed on the front surface of the control panel (2) and the top surface of the sun visor (7).

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