Optical path gas cell for laboratory

Abstract

The utility model discloses a kind of optical path gas chambers for laboratory, including gas chamber main body, the upper side outer wall of gas chamber main body is sequentially fixedly connected with gas inlet interface, photoelectric detector interface and gas outlet interface, the lower side outer wall of gas chamber main body is penetrated and is provided with laser exit window, the bottom corner of gas chamber main body is fixedly connected with support leg respectively, and the bottom end of support leg is bonded with antiskid pad, the outer wall of one side of gas chamber main body is fixedly connected with push rod drive seat by bolt, the side of push rod drive seat away from gas chamber main body is sealed by end cap connecting piece, the outer wall of another side of gas chamber main body is embedded with mirror adjusting knob, the inner wall bottom of gas chamber main body is attached with heat-conducting silica gel pad, the inside two ends of gas chamber main body are symmetrically welded with mirror support, the inside of mirror support is fixed with mirror by buckle, mainly used for dangerous gas detection, environmental pollutant monitoring and industrial process gas analysis etc. Scene.

Description

Technical Field

[0001] This utility model relates to the field of optical path gas chamber technology, specifically an optical path gas chamber for laboratory use. Background Technology

[0002] Laboratory optical path length chambers are core components commonly used in the field of optical detection, primarily for experiments such as gas composition analysis and light absorption characteristic research. Their performance directly affects the accuracy and stability of detection. Traditional chamber designs often suffer from problems such as inconvenient optical path adjustment, insufficient structural stability, and poor gas sealing. For example, some chambers use fixed mirror structures, making it impossible to flexibly adjust the optical path length according to experimental needs, thus limiting the equipment's versatility. Sliding parts often use rigid connections, which are prone to adjustment jamming due to mechanical wear after long-term use, affecting the alignment accuracy of the optical path. The sealing design between the chamber body and the external interface is imperfect, easily leading to gas leakage or the intrusion of external impurities, interfering with the accuracy of the detection results. At the same time, traditional chambers have weak heat dissipation performance, and the internal temperature rise after long-term operation may cause the performance of optical components to drift. Furthermore, the support structure lacks a buffer design, which can easily cause optical path offset under vibration of the experimental platform, reducing the reliability of detection. Utility Model Content

[0003] The purpose of this invention is to provide a laboratory optical path gas chamber to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a laboratory optical path gas chamber, comprising a gas chamber body, wherein a gas inlet interface, a photodetector interface, and a gas outlet interface are sequentially fixedly connected to the upper outer wall of the gas chamber body; a laser emission window is provided through the lower outer wall of the gas chamber body; support feet are fixedly connected to the four corners of the bottom of the gas chamber body, and anti-slip pads are adhered to the bottom of the support feet; a push rod drive seat is fixedly connected to one outer wall of the gas chamber body by bolts; the side of the push rod drive seat away from the gas chamber body is sealed by an end cap connector; a reflector adjustment knob is embedded in the other outer wall of the gas chamber body; a thermally conductive silicone pad is attached to the bottom of the inner wall of the gas chamber body; reflector brackets are symmetrically welded to both ends of the interior of the gas chamber body; and a reflector is fixed to the inner side of the reflector bracket by a buckle.

[0005] As a further embodiment of this utility model: a sliding guide rail is bolted to the upper inner side of the air chamber body along the length direction, a sliding block is slidably connected to the sliding guide rail, and a support rod is vertically welded to the top of the sliding block.

[0006] As a further embodiment of this utility model: a spring is welded to one side of the support rod, and a push rod is hooked to the other end of the spring. The end of the push rod away from the spring passes through the side wall of the air chamber body and is engaged with the output end of the push rod drive seat.

[0007] As a further embodiment of this utility model: a detector mounting base is welded to the outer wall of the gas chamber body on the side away from the push rod drive seat, and a light source emission port is embedded on the outer side of the detector mounting base, and the central axis of the light source emission port is collinear with the laser emission window.

[0008] As a further embodiment of this invention: the output shaft of the reflector adjustment knob passes through the side wall of the air chamber body and is rotatably connected to the back of the reflector for adjusting the tilt angle of the reflector.

[0009] As a further embodiment of this utility model: the gas inlet interface and the gas outlet interface are connected to the internal cavity of the gas chamber body, and the inner side of the photodetector interface is electrically connected to an external photodetector through a wire.

[0010] As a further embodiment of this utility model: a sealing ring is provided at the penetration point between the push rod and the air chamber body, and grease is applied to the contact surface between the sliding block and the sliding guide rail.

[0011] As a further embodiment of this utility model: a sealing ring is provided at the connection between the detector mounting base and the air chamber body, and the outer side of the light source emission port is covered with dustproof glass.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: The combination of the bottom support foot and anti-slip pad of the gas chamber body improves the stability of the equipment on the experimental table. With the inner wall heat-conducting silicone pad, internal heat can be quickly dissipated, avoiding the impact of temperature changes on the accuracy of optical components. The reflector bracket adopts a combination of welding fixation and snap-fit ​​connection, which not only ensures structural strength but also facilitates the disassembly and maintenance of the reflector. Secondly, the cooperative design of the sliding guide rail and sliding block realizes smooth movement. The spring buffer structure offsets the rigid driving force of the push rod, avoiding component deformation. The application of sealing ring and lubricating grease solves the problems of gas leakage and mechanical wear, respectively, extending the service life of the equipment. The fine adjustment function of the reflector adjustment knob, combined with the collinear design of the light source emission port and the laser emission window, ensures the coaxiality of the optical path and improves the stability of the detection signal. The sealing ring of the detector mounting base and the dustproof glass of the light source emission port effectively prevent the intrusion of external impurities and protect the cleanliness of the optical surface. The direct connection design between the gas interface and the cavity reduces flow resistance. The wire connection method of the photoelectric detector interface ensures stable signal transmission. Attached Figure Description

[0013] Figure 1 This invention provides a three-dimensional perspective view of a laboratory optical path gas chamber. Figure 2 This utility model presents a top view of a laboratory optical path gas chamber. Figure 3This is a front view of the optical path gas chamber for laboratory use proposed in this utility model; Figure 4 A cross-sectional view of the optical path gas chamber for laboratory use proposed in this utility model; In the diagram: 1. Gas chamber body; 2. Light source emission port; 3. Reflector adjustment knob; 4. End cap connector; 5. Gas outlet interface; 6. Support foot; 7. Detector mounting base; 8. Push rod drive base; 9. Gas inlet interface; 10. Photodetector interface; 11. Reflector; 12. Sliding block; 13. Laser emission window; 14. Reflector bracket; 15. Sliding guide rail; 16. Thermal conductive silicone pad; 17. Support rod; 18. Spring; 19. Push rod; 20. Anti-slip pad. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-4 In this embodiment of the present invention, a laboratory optical path gas chamber includes a gas chamber body 1. A gas inlet interface 9, a photodetector interface 10, and a gas outlet interface 5 are sequentially fixedly connected to the upper outer wall of the gas chamber body 1. A laser emission window 13 is provided through the lower outer wall of the gas chamber body 1. Support feet 6 are fixedly connected to the four corners of the bottom of the gas chamber body 1, and anti-slip pads 20 are adhered to the bottom of the support feet 6. A push rod drive seat 8 is fixedly connected to one outer wall of the gas chamber body 1 by bolts. The side of the push rod drive seat 8 away from the gas chamber body 1 is sealed by an end cap connector 4. A reflector adjustment knob 3 is embedded in the other outer wall of the gas chamber body 1. A thermally conductive silicone pad 16 is attached to the bottom of the inner wall of the gas chamber body 1. Reflector brackets 14 are symmetrically welded to both ends of the inside of the gas chamber body 1. A reflector 11 is fixed to the inner side of the reflector bracket 14 by a buckle.

[0016] In this utility model, preferably, a sliding guide rail 15 is bolted to the upper inner side of the gas chamber body 1 along the length direction, a sliding block 12 is slidably connected, and a support rod 17 is vertically welded to the top. The bolt fixing improves the installation stability, and the sliding fit enables high-precision adjustment. A spring 18 is welded to one side of the support rod 17 and hooked to a push rod 19. The push rod 19 passes through the side wall of the gas chamber body 1 and is engaged with the push rod drive seat 8. The spring 18 buffers the driving force to prevent component deformation. A sealing ring is provided at the penetration point to prevent air leakage. Lubricant is applied to the contact surface between the sliding block 12 and the sliding guide rail 15 to reduce wear. A detector mounting seat 7 is welded to the other side of the gas chamber body 1, and a light source emission port 2 is embedded on the outer side, with its central axis collinear with the laser emission window 13 to ensure the coaxiality of the optical path and improve detection accuracy. To improve accuracy, a sealing ring is installed at the connection between the detector mounting base 7 and the gas chamber body 1 to enhance sealing. The light source emission port 2 is covered with dustproof glass to protect the optical surface. The output shaft of the reflector adjustment knob 3 passes through the side wall and is rotatably connected to the back of the reflector 11 to achieve fine angle adjustment to meet the needs of multiple optical paths. The gas inlet interface 9 and the gas outlet interface 5 are connected to the internal cavity to ensure gas flow efficiency. The photoelectric detector interface 10 is connected to external equipment through wires to ensure stable signal transmission. A sealing ring is installed at the connection between the push rod 19 and the gas chamber body 1 to prevent air leakage. The sliding block 12 and the sliding guide rail 15 are coated with grease to reduce friction. A sealing ring is installed at the connection between the detector mounting base 7 and the gas chamber body 1. The light source emission port 2 is covered with dustproof glass to reduce optical interference.

[0017] The working principle of this invention is as follows: In use, the laser source is first aligned with the light source emission port 2 to emit laser light. The laser beam passes through the internal cavity of the gas chamber body 1, and after multiple reflections by the reflector 11, it exits from the laser emission window 13. During this process, the tilt angle of the reflector 11 can be finely adjusted in real time by rotating the reflector adjustment knob 3, thereby optimizing the optical path to adapt to different experimental needs. The experimental gas enters the gas chamber body 1 through the gas inlet interface 9. During gas flow, an external photodetector connected to the photodetector interface 10 monitors the change in light intensity after the laser passes through the gas in real time. The exhaust gas after measurement is completed is discharged through the gas outlet interface 5. When the optical path length needs to be adjusted, the push rod drive seat 8 is activated, and its output end drives the push rod 19 to move axially. The push rod 19 acts on the support rod 17 through the hooked spring 18, thereby pushing the sliding block 12 to slide linearly along the sliding guide rail 15. The movement of the sliding block 12 changes the distance between the reflectors 11, thereby adjusting the optical path length. After adjustment, the push rod drive seat 8 is closed. The elastic restoring force of the spring 18 can maintain the relative position lock of the sliding block 12 and the sliding guide rail 15, ensuring optical path stability. The thermally conductive silicone pad 16 attached to the bottom of the inner wall of the gas chamber body 1 evenly transfers the heat of the external temperature control equipment to the inside of the gas chamber, keeping the cavity in a constant temperature environment and avoiding the impact of temperature fluctuations on optical detection accuracy. The passage between the push rod 19 and the gas chamber body 1 is sealed with a sealing ring to prevent gas leakage. The contact surface between the sliding block 12 and the sliding guide rail 15 is coated with grease to reduce frictional resistance. A sealing ring is set at the connection between the detector mounting seat 7 and the gas chamber body 1 to enhance the overall sealing performance. The dustproof glass covering the outside of the light source emission port 2 can prevent external dust from contaminating the optical surface. These structural designs together ensure the stability and reliability of the gas chamber in long-term use.

[0018] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A laboratory optical path gas cell comprising a cell body (1), characterised in that: The upper outer wall of the gas chamber body (1) is sequentially fixedly connected with a gas inlet interface (9), a photoelectric detector interface (10) and a gas outlet interface (5), the lower outer wall of the gas chamber body (1) is provided with a laser exit window (13) penetratingly, the bottom corners of the gas chamber body (1) are fixedly connected with supporting legs (6) respectively, and the bottom ends of the supporting legs (6) are bonded with anti-skid pads (20), one side outer wall of the gas chamber body (1) is fixedly connected with a push rod driving seat (8) through bolts, the side, away from the gas chamber body (1), of the push rod driving seat (8) is sealed through an end cover connecting piece (4), the other side outer wall of the gas chamber body (1) is embedded with a mirror adjusting knob (3), the inner wall bottom of the gas chamber body (1) is pasted with a heat-conducting silica gel pad (16), the inside of the gas chamber body (1) is symmetrically welded with mirror supports (14) at both ends, and the inside of the mirror supports (14) is fixedly provided with a mirror (11) through buckles.

2. A gas cell for use in a laboratory according to claim 1, characterized in that: The inside of the gas chamber body (1) is bolted with a sliding guide rail (15) on the upper part along the length direction, the sliding guide rail (15) is slidingly connected with a sliding block (12), and the top of the sliding block (12) is vertically welded with a supporting rod (17).

3. A laboratory optical path gas cell according to claim 2, characterised in that: One side of the supporting rod (17) is welded with a spring (18), the other end of the spring (18) is hooked with a push rod (19), and the end, away from the spring (18), of the push rod (19) penetrates through the side wall of the gas chamber body (1) and is clamped with the output end of the push rod driving seat (8).

4. A gas cell for use in a laboratory according to claim 1, characterized in that: The outside of the push rod driving seat (8) is embedded with a light source emitting port (2), and the central axis of the light source emitting port (2) is collinear with the laser exit window (13).

5. A gas cell for use in a laboratory according to claim 1, characterized in that: The output shaft of the mirror adjusting knob (3) penetrates through the side wall of the gas chamber body (1) and is rotationally connected with the back of the mirror (11), for adjusting the inclination angle of the mirror (11).

6. A gas cell for use in a laboratory according to claim 1, characterized in that: The gas inlet interface (9) and the gas outlet interface (5) are in communication with the internal cavity of the gas chamber body (1), and the inside of the photoelectric detector interface (10) is electrically connected with an external photoelectric detector through wires.

7. A gas cell for use in a laboratory according to claim 3, characterized in that: A sealing ring is arranged at the penetration of the push rod (19) and the gas chamber body (1), and lubricating grease is applied on the contact surface of the sliding block (12) and the sliding guide rail (15).

8. A gas cell for use in a laboratory according to claim 4, characterized in that: A sealing ring is arranged at the connection of the detector mounting seat (7) and the gas chamber body (1), and the outside of the light source emitting port (2) is covered with a dustproof glass.

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