A purge box for a laser gas analyzer

Abstract

The utility model discloses a kind of for laser gas analyzer's purging box, it is related to the purging box technical field of laser gas analyzer, including box, the inside installation of box has purging mechanism, the side installation of box has exhaust filtering mechanism.The utility model when using, under the drive of speed reducer, can make the rear end of connecting rod do clockwise circular motion with round plate, the front end of connecting rod can be pulled rack reciprocating movement by the cooperation of slide, slider and support plate, can make spur gear drive first air knife brush and second air knife brush reciprocating swing, to realize fan-shaped air blowing, realize the comprehensive purging of laser gas analyzer, cleaning effect is strong, can be on the lens of laser gas analyzer and analyzer.

Description

Technical Field

[0001] This utility model relates to the technical field of purge boxes for laser gas analyzers, and specifically to a purge box for a laser gas analyzer. Background Technology

[0002] The working principle of a wearable laser analyzer for measuring gas is as follows: the transmitting unit and the receiving unit are installed on the outer walls of opposite sides of a pipe. The laser wavelength emitted by the transmitting unit is tuned to a certain intensity, and the laser wavelength is the absorption wavelength of the gas to be measured. The tuned laser passes through the gas to be measured, and its intensity decreases after being absorbed by the gas. Then it is received by the receiving unit on the other side. The higher the concentration of the gas to be measured, the lower the intensity of the received laser. By analyzing the intensity of the received laser, the concentration of the gas to be measured can be determined.

[0003] In the production and processing of petrochemicals, a large amount of harmful gases are generated. In related technologies, laser analyzers are used to detect the concentration of harmful gas to be tested. The transmitting unit and receiving unit of the laser gas analyzer are installed on the outer walls of the opposite sides of the pipeline. Lenses are installed between the transmitting unit and the gas to be tested, and between the gas to be tested and the receiving unit, to reduce the contact between the toxic gas to be tested and the transmitting unit and the receiving unit, thereby reducing the corrosive effect on the internal components of the laser gas analyzer.

[0004] The aforementioned technologies have the following drawbacks: When laser gas analyzers are installed in harsh industrial environments, oil, dust, and other debris in the air can easily adhere to the lenses of the laser gas analyzer, reducing light transmittance or even completely blocking the laser. The entire laser analyzer can also become contaminated, thereby reducing the accuracy of the laser analyzer in detecting the gas to be tested. Furthermore, when the laser analyzer is purged, the oil and dust on the analyzer body can pollute the environment. Utility Model Content

[0005] The purpose of this invention is to provide a purge box for a laser gas analyzer to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A purge box for a laser gas analyzer includes a box body, a purge mechanism installed inside the box body, and an exhaust filter mechanism installed on one side of the box body.

[0008] The purging mechanism includes a frame mounted on the top of a housing. A U-shaped plate is installed at the center of the bottom of the frame's inner cavity along the front-to-back direction. Slides are formed on the left and right inner walls of the U-shaped plate along the front-to-back direction, with both ends of the slides closed. A movable slider is inserted into the center of the inner cavity of each slide. A support plate is installed on the inner side of the slider. A rack is screwed to the center of the bottom of the support plate along the front-to-back direction. A support base is welded to the center of the rear side of the support plate. A base is welded to the center of the rear side of the frame. A geared motor is screwed to the rear of the base. A circular plate is installed at the output end of the geared motor. A connecting rod is rotatably connected to the top of the left side wall of the circular plate via a pin. The other end of the connecting rod is connected to the inner cavity of the support seat by a pin. The bottom ends of the left and right inner walls of the frame are rotatably connected to a rotating shaft by bearings. The left and right sides of the outer wall of the rotating shaft are respectively interference-fitted with the inner rings of two bearings. The left and right inner walls of the frame are respectively fixedly connected to the outer rings of two bearings. A spur gear that meshes with a rack is keyed to the center of the outer wall of the rotating shaft. One end of an ear plate is interference-fitted to the left and right sides of the outer wall of the rotating shaft. The other end of the ear plate is screwed to a base plate. The bottom end of the base plate is screwed to a first air knife brush along the left and right direction. The left and right sides of the bottom end of the base plate are screwed to symmetrically arranged support rods. The bottom end of the support rod is screwed to a second air knife brush, and the two second air knife brushes are symmetrical.

[0009] A further improvement of this utility model is that: a cover that shields the spur gear is screwed to the center of the bottom end of the frame, and the frame can be fixed to the top of the box using bolts to suspend the mechanism.

[0010] A further improvement of this utility model is that the inner cavity of the slide is dovetail-shaped, and the slider is adapted to be inserted into the slide. The diameter of the circular plate is equal to one-quarter of the circumference of the pitch circle of the spur gear. The inner cavity of the slide is dovetail-shaped, and the slider is adapted to be inserted into the slide, thereby improving the fixation of the slider on the support plate.

[0011] A further improvement of this utility model is that the distance between the two second air blades can accommodate a general-purpose laser gas analyzer, ensuring that the width of the core components of different models of laser gas analyzers can enter through the space between the two second air blades.

[0012] A further improvement of the present invention is that the exhaust filtration mechanism includes an exhaust pipe, which is fixedly connected to one side of the housing. One end of the exhaust pipe is threaded with a fixing ring, and the surface of the fixing ring is threaded with a fixing bolt. The fixing bolt is threaded between the exhaust pipe and the fixing ring. When the dust is compressed to a certain extent, the fixing bolt is twisted to remove the fixing ring and sweep the dust out of the exhaust pipe.

[0013] A further improvement of this utility model is that: a motor is installed in the middle of the fixing ring, a cleaning brush is fixedly connected to the output end of the motor, a filter screen is attached to the front side of the cleaning brush, and the filter screen is fixedly connected inside the exhaust pipe. The motor is started at regular intervals, and the motor drives the cleaning brush to rotate, so that the cleaning brush cleans the oil and dust on the filter screen.

[0014] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0015] 1. This utility model provides a purging box for a laser gas analyzer. In use, driven by a geared motor, the circular plate drives the rear end of the connecting rod to make a clockwise circular motion. Through the cooperation of the slide rail, slider, and support plate, the front end of the connecting rod can drive the rack to move back and forth, which can drive the spur gear to swing the first and second air knife brushes back and forth, thereby realizing fan-shaped air blowing and achieving comprehensive purging of the laser gas analyzer. The cleaning effect is strong, and it can effectively clean the lenses and oil and dust on the laser gas analyzer, greatly improving the accuracy of the laser analyzer in detecting the gas to be tested.

[0016] 2. This utility model provides a purging box for a laser gas analyzer. When the purging mechanism purifies the laser gas analyzer, it blows out oil and dust from the analyzer and mixes them with air before expelling them into the exhaust pipe. As the dust passes through the exhaust pipe, the filter screen filters the oil and dust. When too much dust accumulates on the filter screen, the motor is activated at regular intervals. The motor drives the cleaning brush to rotate, cleaning the oil and dust from the filter screen and sweeping the oil and dust into the inside of the exhaust pipe. When the dust accumulates to a certain extent, the fixing bolt is twisted to remove the fixing ring, allowing the dust to be swept out of the exhaust pipe. This reduces environmental pollution and lowers maintenance difficulty. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall cross-sectional structure of this utility model;

[0018] Figure 2 This is a side sectional view of the purging mechanism of this utility model.

[0019] Figure 3 This is a front cross-sectional view of the purging mechanism of this utility model;

[0020] Figure 4 This is a schematic diagram of the exhaust filtration mechanism of this utility model.

[0021] In the diagram: 1. Housing; 2. Blowing mechanism; 20. Frame; 21. Outer cover; 22. Slide rail; 23. Slider; 24. Support plate; 25. Rack; 26. Support base; 27. Base; 29. ​​Circular plate; 290. Connecting rod; 291. Rotating shaft; 292. Spur gear; 293. Ear plate; 294. Base plate; 295. First air knife brush; 296. Support rod; 297. Second air knife brush; 299. U-shaped plate; 3. Exhaust filtration mechanism; 30. Exhaust pipe; 31. Fixing ring; 32. Fixing bolt; 33. Filter screen; 34. Motor; 35. Cleaning brush. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to embodiments:

[0023] Example 1

[0024] like Figure 1-4As shown, this utility model provides a purging box for a laser gas analyzer, including a box body 1. A purging mechanism 2 is installed inside the box body 1, and an exhaust filter mechanism 3 is installed on one side of the box body 1. The purging mechanism 2 includes a frame 20, which is installed at the top inside the box body 1. A U-shaped plate 299 is installed at the center of the bottom of the inner cavity of the frame 20 along the front-back direction. Slides 22 are provided on the left and right inner walls of the U-shaped plate 299 along the front-back direction, and the two ends of the slides 22 are closed. A slider 2 that can move back and forth is inserted into the center of the inner cavity of the slide 22. 3. A support plate 24 is installed on the inner side of the slider 23. A rack 25 is screwed to the center of the bottom end of the support plate 24 along the front-back direction. A support base 26 is welded to the center of the rear side of the support plate 24. A base 27 is welded to the center of the rear side of the frame 20. A geared motor is screwed to the rear end of the base 27. A circular plate 29 is installed at the output end of the geared motor. One end of a connecting rod 290 is rotatably connected to the top of the left side wall of the circular plate 29 via a pin. The other end of the connecting rod 290 is connected to the inner cavity of the support base 26 via a pin. The left and right sides of the frame 20... The bottom of the inner wall is rotatably connected to a rotating shaft 291 via bearings. The left and right sides of the outer wall of the rotating shaft 291 are respectively interference-fitted with the inner rings of two bearings. The left and right inner walls of the frame 20 are respectively fixedly connected to the outer rings of two bearings. A spur gear 292 that meshes with a rack 25 is keyed to the center of the outer wall of the rotating shaft 291. One end of an ear plate 293 is interference-fitted to the left and right sides of the outer wall of the rotating shaft 291. The other end of the ear plate 293 is screwed to a base plate 294. The bottom end of the base plate 294 is screwed to a first air knife brush 295 along the left and right direction. The bottom left and right sides of the 294 are screwed with symmetrically arranged support rods 296. The bottom of the support rods 296 is screwed with second air knife brushes 297, and the two second air knife brushes 297 are symmetrical. The bottom center of the frame 20 is screwed with an outer cover 21 that shields the spur gear 292. The inner cavity of the slide 22 is dovetail groove shaped, and the slider 23 is adapted to be inserted into the slide 22. The diameter of the circular plate 29 is equal to one-quarter of the circumference of the pitch circle of the spur gear 292. The distance between the two second air knife brushes 297 can accommodate a general-purpose laser gas analyzer.

[0025] Specifically, the geared motor, model R107R77, is equipped with a reducer and is controlled by an external operating system. It is used to drive the circular plate 29 to rotate clockwise. When the geared motor is not working, the reducer prevents the circular plate 29 from rotating freely.

[0026] The distance between the two second air knife brushes 297 is 35cm, ensuring that the width of the core components of different models of laser gas analyzers can enter through the space between the two second air knife brushes 297.

[0027] The frame 20 can be fixed to the top of the housing 1 using bolts to suspend the mechanism. The first air knife brush 295 and the second air knife brush 297 are connected to the air knife brush fan through air pipes to provide working power for the first air knife brush 295 and the second air knife brush 297. When in use, the external power supply of the geared motor is turned on. The geared motor drives the circular plate 29 to drive the rear side of the connecting rod 290 to rotate clockwise. When the connecting rod 290 rotates from 0 degrees to 90 degrees, under the limiting action of the slider 23, the front end of the connecting rod 290 can push the support plate 24 to move forward, so that the rack 25 moves with the support plate 24. When the connecting rod 290 rotates from 90 degrees to 270 degrees, the front end of the connecting rod 290 pulls the support plate 24 to move backward. When the connecting rod 290 rotates another 180 degrees... At this time, the connecting rod 290 can push the support plate 24 to continue moving forward. As the connecting rod 290 moves clockwise, the rack 25 can move back and forth. Under the movement of the rack 25, the spur gear 292 can rotate clockwise and counterclockwise. Since the diameter of the circular plate 29 is equal to one-quarter of the circumference of the pitch circle of the spur gear 292, the maximum rotation angle of the spur gear 292 is close to 90 degrees. Under the support of the rotating shaft 291 and the base plate 294, the first air knife brush 295 and the second air knife brush 297 can swing back and forth. The first air knife brush 295 and the second air knife brush 297 blow air in a fan shape, which can thoroughly purge the laser gas analyzer. It is flexible in use and suitable for different laser gas analyzers, preventing omissions and improving the overall quality of purging the laser gas analyzer.

[0028] Example 2

[0029] like Figure 1-4 As shown, based on Embodiment 1, this utility model provides a technical solution: Preferably, the exhaust filter mechanism 3 includes an exhaust pipe 30, which is fixedly connected to one side of the housing 1. One end of the exhaust pipe 30 is threadedly connected to a fixing ring 31, and the surface of the fixing ring 31 is threadedly connected to a fixing bolt 32. The fixing bolt 32 is threadedly connected between the exhaust pipe 30 and the fixing ring 31. A motor 34 is installed in the middle of the fixing ring 31, and a cleaning brush 35 is fixedly connected to the output end of the motor 34. A filter screen 33 is attached to the front side of the cleaning brush 35, and the filter screen 33 is fixedly connected inside the exhaust pipe 30.

[0030] Specifically, when the purging mechanism 2 purifies the laser gas analyzer, it blows out the oil and dust on the laser gas analyzer and mixes it with air before expelling it into the exhaust pipe 30. As the air passes through the exhaust pipe 30, the filter screen 33 filters out the oil and dust. When too much dust is compressed on the filter screen 33, the motor 34 is started at a timer. The motor 34 drives the cleaning brush 35 to rotate. The cleaning brush 35 is detachable. When the cleaning brush 35 cleans the oil and dust on the filter screen 33, detergent is added to assist in cleaning the filter screen 33. The cleaning brush 35 sweeps the oil and dust into the inside of the exhaust pipe 30. When the dust is compressed to a certain extent, the fixing bolt 32 is twisted to remove the fixing ring 31, and the dust is swept out of the exhaust pipe 30.

[0031] The working principle of the purge box used in the laser gas analyzer will be explained in detail below.

[0032] like Figure 1-4 As shown, the laser gas analyzer is placed inside the housing, and then the external power supply of the geared motor is connected. The geared motor drives the circular plate 29 to rotate clockwise around the rear side of the connecting rod 290. When the connecting rod 290 rotates from 0 degrees to 90 degrees, under the limiting action of the slider 23, the front end of the connecting rod 290 can push the support plate 24 to move forward, thereby causing the rack 25 to move with the support plate 24. When the connecting rod 290 rotates from 90 degrees to 270 degrees, the front end of the connecting rod 290 pulls the support plate 24 to move backward. When the connecting rod 290 rotates another 180 degrees, the connecting rod 290 can push the support plate 24 to continue moving forward. Thus, with the clockwise circular motion of the connecting rod 290, the rack 25 can move back and forth. Under the movement of the rack 25, the spur gear 292 can rotate clockwise and counterclockwise. Since the diameter of the circular plate 29 is equal to the circumference of the pitch circle of the spur gear 292... One-quarter, so that the maximum rotation angle of the spur gear 292 is close to 90 degrees. Under the support of the rotating shaft 291 and the base plate 294, the first air knife brush 295 and the second air knife brush 297 can swing back and forth. The first air knife brush 295 and the second air knife brush 297 blow air in a fan shape, so that the laser gas analyzer can be thoroughly purged. It is flexible in use and suitable for different laser gas analyzers, preventing omissions and improving the overall quality of purging the laser gas analyzer. The filter screen 33 filters oil and dust. When too much dust is squeezed on the filter screen 33, the motor 34 is started at a timer. The motor 34 drives the cleaning brush 35 to rotate. The cleaning brush 35 cleans the oil and dust on the filter screen 33 and sweeps the oil and dust into the inside of the exhaust pipe 30. When the dust is squeezed to a certain extent, the fixing bolt 32 is twisted to remove the fixing ring 31 and sweep the dust out of the exhaust pipe 30.

[0033] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A purge chamber for a laser gas analyzer, comprising a chamber body (1), characterized in that: The box (1) is equipped with a purging mechanism (2) inside, and an exhaust filter mechanism (3) is installed on one side of the box (1); The purging mechanism (2) includes a frame (20), which is installed at the top inside the housing (1). A U-shaped plate (299) is installed at the center of the bottom of the inner cavity of the frame (20) along the front-back direction. Slides (22) are provided on the left and right inner walls of the U-shaped plate (299) along the front-back direction, and the two ends of the slides (22) are closed. A sliding block (23) that can move back and forth is inserted into the center of the inner cavity of the slide (22). A support plate is installed on the inner side of the sliding block (23). 24), a rack (25) is screwed to the center of the bottom end of the support plate (24) along the front-rear direction; a support base (26) is welded to the center of the rear side of the support plate (24); a base (27) is welded to the center of the rear side of the frame (20); a geared motor is screwed to the rear end of the base (27); a circular plate (29) is installed at the output end of the geared motor; and a connecting rod (290) is rotatably connected to the top of the left side wall of the circular plate (29) via a pin. The other end of the connecting rod (290) is connected to the inner cavity of the support base (26) by a pin. The bottom ends of the left and right inner walls of the frame (20) are rotatably connected to the rotating shaft (291) by bearings. The left and right sides of the outer wall of the rotating shaft (291) are respectively interference-fitted with the inner rings of the two bearings. The left and right inner walls of the frame (20) are respectively fixedly connected to the outer rings of the two bearings. The center of the outer wall of the rotating shaft (291) is keyed with a spur gear (292) that meshes with the rack (25). (291) has an ear plate (293) on each of its left and right sides with an interference fit. The other end of the ear plate (293) is screwed to a base plate (294). The bottom end of the base plate (294) is screwed to a first air knife brush (295) along the left and right direction. The bottom end of the base plate (294) is screwed to the left and right sides with symmetrically arranged support rods (296). The bottom end of the support rods (296) is screwed to a second air knife brush (297), and the two second air knife brushes (297) are symmetrical from left to right.

2. The purge chamber for a laser gas analyzer according to claim 1, characterized in that: The bottom center of the frame (20) is screwed to an outer cover (21) that shields the spur gear (292).

3. A purge chamber for a laser gas analyzer according to claim 2, characterized in that: The inner cavity of the slide (22) is dovetail groove shaped, and the slider (23) is adapted to be inserted into the slide (22). The diameter of the circular plate (29) is equal to one-quarter of the circumference of the pitch circle of the spur gear (292).

4. A purge chamber for a laser gas analyzer according to claim 3, characterized in that: The spacing between the two second air knife brushes (297) is sufficient to accommodate a general-purpose laser gas analyzer.

5. A purge chamber for a laser gas analyzer according to claim 1, characterized in that: The exhaust filtration mechanism (3) includes an exhaust pipe (30), which is fixedly connected to one side of the housing (1). One end of the exhaust pipe (30) is threadedly connected to a fixing ring (31), and the surface of the fixing ring (31) is threadedly connected to a fixing bolt (32). The fixing bolt (32) is threadedly connected between the exhaust pipe (30) and the fixing ring (31).

6. A purge chamber for a laser gas analyzer according to claim 5, characterized in that: A motor (34) is installed in the middle of the fixing ring (31), and a cleaning brush (35) is fixedly connected to the output end of the motor (34). A filter screen (33) is attached to the front side of the cleaning brush (35), and the filter screen (33) is fixedly connected to the inside of the exhaust pipe (30).

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