A dust monitoring instrument for environmental protection

Abstract

The invention discloses a dust monitor for environmental protection, which belongs to the technical field of environmental protection dust monitoring. The dust monitor for environmental protection comprises a controller for receiving dust particle monitoring signals, a sampling head for organic sampling of dust particles is fixedly connected to the controller, two sets of electric slide rails are fixed on the back of the controller, an electric slider is slidably mounted on the electric slide rail, a moving frame is fixedly mounted on the electric slider, an annular slide rail is fixed on the upper end of the moving frame, an annular slide rail is slidably mounted on the annular slide rail, and a bogie is fixedly mounted on the annular slide rail; a rotating protective mechanism for protecting the sampling area of ​​the sampling head is provided on the bogie; a rotating protective mechanism is provided on the outside of the sampling head of the dust monitor, and the protection range of the outside of the sampling head can be adjusted according to environmental factors, so as to maintain normal sampling and monitoring while preventing the sampling head from being damaged by impact or blocked by foreign objects.

Description

Technical Field

[0001] The invention relates to the technical field of environmental protection dust monitoring, in particular to a dust monitoring instrument for environmental protection. Background Art

[0002] Construction sites, industrial parks, transportation hubs, city centers and other places are affected by factors such as construction or vehicle traffic. There is a large amount of dust in the environment. Dust particles have a great impact on human health. The installation of dust monitors can monitor the concentration and particle size of dust particles in the environment in real time, and timely manage the environment according to the monitored air quality to reduce the dust content in the atmosphere.

[0003] For example, the patent with publication number CN221348620U discloses a monitoring device for monitoring dust using beta rays, which includes a fixed seat, a monitoring device body, a crossbeam, and two beta source device bodies fixedly connected to the top of the crossbeam. A height adjustment component is arranged between the fixed seat and the monitoring device body. A display screen is fixedly connected to the front side of the monitoring device body, a mounting seat is fixedly connected to the top of the monitoring device body, a connecting rod is fixedly connected to the bottom of the crossbeam, and a disassembly angle adjustment component is arranged between the mounting seat and the connecting rod. The monitoring device can adjust the height and orientation of the two beta source device bodies, and is convenient for quickly and efficiently disassembling and assembling the crossbeam and the beta source device body, so as to regularly inspect and maintain the beta source device body. Another example is the patented dust monitoring device with publication number CN112577869A, which includes a monitoring module, the monitoring module includes a monitoring box and a dust sensor, and the dust sensor is arranged in the monitoring box; a display module, the display module includes a display box, and the display box is provided with a first door panel and a second door panel, and the first door panel and the second door panel can be opened and closed on the display box; a rod body, the rod body is arranged between the monitoring module and the display module, and the distance between the first door panel and the second door panel is less than or equal to the width of the monitoring box. The distance between the first door panel and the second door panel is less than or equal to the width of the monitoring box, which can ensure that the first door panel and the second door panel are fully opened, and the monitoring box can be arranged between the first door panel and the second door panel without interfering with each other.

[0004] The above patent uses a β source device to monitor environmental dust. However, for poor monitoring environments, especially on construction sites, due to the large amount of construction waste, some waste or bags on the construction site fly with the wind in a windy environment, which can easily collide with or block the sampling head of the monitor, which is not conducive to the sampling of dust particles and affects the accuracy of real-time monitoring data. In addition, in a windless environment, the air flow is poor, which affects the propagation and diffusion of dust, and may cause the particles in the dust to be unable to be effectively sucked into the sensor of the monitor, thereby affecting the accuracy of the monitoring results.

[0005] In response to the above problems, it is urgently necessary to carry out innovative designs based on the original dust monitoring instruments. Summary of the invention

[0006] The purpose of the present invention is to provide a dust monitor for environmental protection, so as to solve the problem raised in the above background technology that on construction sites, due to the large amount of construction waste, some of the waste or bags on the construction sites fly with the wind in a windy environment, which can easily collide with or block the sampling head of the monitor, which is not conducive to the sampling of dust particles and affects the accuracy of real-time monitoring data.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a dust monitoring instrument for environmental protection, comprising a controller for receiving dust particle monitoring signals, a sampling head for organic sampling of dust particles fixedly connected to the controller, a collection bottle for collecting water vapor installed on the sampling head, and a support frame fixedly installed on the outside below the sampling head, a wind speed sensor fixed on one side of the upper surface of the support frame, and a wind vane fixed on the other side of the upper surface of the support frame, two sets of electric slide rails fixed on the back of the controller, an electric slider slidably installed on the electric slide rail, a mobile frame fixedly installed on the electric slider, an annular slide rail fixed on the upper end of the mobile frame, an annular slide rail slidably installed on the annular slide rail, and a bogie fixedly installed on the annular slide rail; The bogie is provided with a rotating protection mechanism for protecting the sampling area of ​​the sampling head.

[0008] Preferably, the rotary protection mechanism comprises a toothed rod fixed on the bogie, and the outer sliding sleeve of the toothed rod is provided with an inner toothed ring, and the outer part of the inner toothed ring is fixedly mounted with an outer protection cover; The upper surface of the outer protective cover is provided with a plurality of annular sliding grooves at equal angles, a sliding column is slidably connected in the annular sliding groove, and a rotating ring is fixed on the upper and lower surfaces of the sliding column; The two rotating rings are respectively attached to the upper and lower ends of the upper surface of the outer protective cover, and the inner protective cover is fixedly installed on the rotating ring at the lower end.

[0009] Preferably, the inner wall of the outer protective cover and the outer wall of the inner protective cover are in contact with each other; The inner protective cover and the outer protective cover are provided with a plurality of ventilation holes at equal angles, and the positions of the ventilation holes provided on the inner protective cover and the outer protective cover are connected and correspond to each other.

[0010] Preferably, positioning plates are symmetrically fixed on both sides of the outer side of the inner gear ring; A cylinder is fixedly installed on the upper surface of the bogie, and a moving seat is fixed on the output end of the cylinder. A push rod is rotatably installed on the moving seat, and the other end of the push rod is rotatably connected to the positioning piece.

[0011] Preferably, a steering mechanism for driving the inner protective cover to rotate is provided on the positioning piece, and the rotation of the inner protective cover can adjust the flow rate of gas in the sampling area of ​​the sampling head.

[0012] Preferably, the steering mechanism comprises a steering slide frame fixed on a rotating ring above the outer protective cover, a cam rod is rotatably mounted on the positioning plate, a positioning slider is fixed on the cam rod, and the cam rod is slidably connected to the steering slide frame via the positioning slider.

[0013] Preferably, a driving bevel gear is fixedly connected below the push rod along the direction of the rotation axis of the positioning plate, a driven bevel gear is meshedly connected beside the driving bevel gear, and the driven bevel gear is coaxially fixedly connected to the cam rod.

[0014] Preferably, the movable frame is provided with an air volume control mechanism for increasing the gas flow around the sampling head.

[0015] Preferably, the air volume control mechanism comprises an outer gear ring fixed to the outside of the annular slide; A motor is fixedly mounted on the moving frame, an output end of the motor is connected with a power gear, and the power gear is meshedly connected with the outer gear ring.

[0016] Preferably, large-aperture mesh covers are embedded and installed on the side walls of the outer protective cover and the inner protective cover; A plurality of wind plates are fixed at equal angles on the outer side wall of the outer protective cover, and the wind plates are distributed on both sides of the large-aperture mesh cover.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The dust monitoring instrument for environmental protection uses the sampling head to generate pressure to sample the atmosphere, monitors the concentration of atmospheric dust particles in real time, and senses the changes in wind speed and direction in the environment through the wind speed sensor and wind vane to assist in analyzing the air quality. Furthermore, a rotating protective mechanism is arranged outside the sampling head. According to the severity of the use environment and the wind force, the inner protective cover and the outer protective cover are controlled to be arranged outside the sampling head. In generally severe environments and wind conditions, the inner protective cover and the outer protective cover are rotated to fold each other. At this time, the outer protective cover moves up to maintain sufficient sampling space above the sampling head, so that the ventilation holes opened on the inner protective cover and the outer protective cover are connected and corresponded, and while maintaining atmospheric sampling monitoring, it can prevent large foreign objects from hitting and clogging the sampling head. In extremely harsh operating environments and strong winds, the inner protective cover is rotated to close at the vents on the outer protective cover. At this time, the outer protective cover moves downward to expand the range of its protection setting outside the sampling head. While maintaining atmospheric sampling monitoring, it can prevent small pieces of foreign matter from hitting and clogging the sampling head, thereby improving the protection of the sampling head application; Furthermore, an air volume control mechanism is provided, and an air plate is provided on the outer wall of the outer protective cover, and the air plates are symmetrically distributed about the outer protective cover. In a windless environment, the outer protective cover is controlled to rotate to drive the air plates to rotate synchronously. The air plates increase the flow of surrounding gas during the turning process, so that the sampling head can better suck dust for monitoring; The running motor controls the rotation of the power gear. Under the meshing transmission action of the power gear and the outer gear ring, the annular slide and the bogie are controlled to reciprocate. The bogie drives the outer protective cover and the inner protective cover to reciprocate synchronously, thereby driving the wind plate outside the outer protective cover to reciprocate and increase the gas flow rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the controller of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the electric slide rail of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the sampling head of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the mobile frame of the present invention; Figure 5 This is a schematic diagram of the three-dimensional structure of the outer protective cover of the present invention; Figure 6 This is a schematic diagram of the three-dimensional structure of the inner protective cover of the present invention; Figure 7 It is a schematic diagram of the three-dimensional structure of the bogie of the present invention.

[0019] Figure 8 It is a schematic diagram of the three-dimensional structure of the toothed rod of the present invention.

[0020] Fig. 9 It is a schematic diagram of the three-dimensional structure of the annular slide of the present invention.

[0021] Fig.10 It is a schematic diagram of the three-dimensional structure of the rotating ring of the present invention.

[0022] Fig.11 It is a schematic diagram of the three-dimensional structure of the cam rod of the present invention.

[0023] Fig.12 It is a schematic diagram of the three-dimensional structure of the push rod of the present invention.

[0024] Fig.13 It is a schematic diagram of the three-dimensional structure of the wind plate of the present invention.

[0025] In the figure: 1, controller; 2, sampling head; 3, collecting bottle; 4, support frame; 5, wind speed sensor; 6, wind vane; 7, electric slide rail; 8, electric slider; 9, moving frame; 101, annular slide rail; 102, annular slide frame; 11, bogie; 12, toothed rod; 13, inner gear ring; 14, outer protective cover; 15, annular slide groove; 16, slide column; 17, swivel; 18, inner protective cover; 19, positioning piece; 20, cylinder; 21, moving seat; 22, push rod; 23, driving bevel gear; 24, cam rod; 25, driven bevel gear; 26, positioning slider; 27, steering slide frame; 28, outer gear ring; 29, motor; 30, power gear; 31, large aperture mesh cover; 32, wind plate; 33, vent. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Example 1: Please refer to Figure 1-Figure 13 , the present invention provides the following technical solutions: A dust monitoring instrument for environmental protection, comprising a controller 1 for receiving dust particle monitoring signals, a sampling head 2 for organic sampling of dust particles fixedly connected to the controller 1, a collecting bottle 3 for collecting water vapor installed on the sampling head 2, and a support frame 4 fixedly installed outside the lower part of the sampling head 2, a wind speed sensor 5 fixed on one side of the upper surface of the support frame 4, and a wind vane 6 fixed on the other side of the upper surface of the support frame 4, two groups of electric slide rails 7 fixed on the back of the controller 1, an electric slider 8 slidably installed on the electric slide rail 7, a mobile frame 9 fixedly installed on the electric slider 8, an annular slide rail 101 fixed on the upper end of the mobile frame 9, an annular slide rail 102 slidably installed on the annular slide rail 101, and a bogie 11 fixedly installed on the annular slide rail 102; The bogie 11 is provided with a rotating protection mechanism for protecting the sampling area of ​​the sampling head 2. The rotating protection mechanism includes a toothed rod 12 fixed on the bogie 11, and the outer sliding sleeve of the toothed rod 12 is provided with an inner toothed ring 13, and the outer side of the inner toothed ring 13 is fixedly installed with an outer protection cover 14; the upper surface of the outer protection cover 14 is provided with a plurality of annular grooves 15 at equal angles, and a slide column 16 is slidably connected in the annular groove 15, and a rotating ring 17 is fixed on the upper and lower surfaces of the slide column 16; The two swivels 17 are respectively attached to the upper and lower ends of the upper surface of the outer protective cover 14, and the inner protective cover 18 is fixedly mounted on the lower swivel 17. The inner wall of the outer protective cover 14 and the outer wall of the inner protective cover 18 are attached to each other; A plurality of ventilation openings 33 are formed at equal angles on the inner protective cover 18 and the outer protective cover 14 , and the positions of the ventilation openings 33 formed on the inner protective cover 18 and the outer protective cover 14 are connected and correspond to each other.

[0028] Positioning plates 19 are symmetrically fixed on both sides of the outer side of the inner gear ring 13; a cylinder 20 is fixedly installed on the upper surface of the bogie 11, and a moving seat 21 is fixed at the output end of the cylinder 20, a push rod 22 is rotatably installed on the moving seat 21, and the other end of the push rod 22 is rotatably connected to the positioning plate 19; a steering mechanism for driving the inner protective cover 18 to rotate is provided on the positioning plate 19, and the rotation of the inner protective cover 18 can adjust the flow rate of gas in the sampling area of ​​the sampling head 2.

[0029] The steering mechanism includes a steering slide frame 27 fixed on the swivel 17 above the outer protective cover 14 , a cam rod 24 is rotatably mounted on the positioning piece 19 , a positioning slider 26 is fixed on the cam rod 24 , and the cam rod 24 is slidably connected to the steering slide frame 27 via the positioning slider 26 .

[0030] A driving bevel gear 23 is fixedly connected to the push rod 22 along the rotation axis direction of the positioning piece 19 , and a driven bevel gear 25 is meshedly connected to the driving bevel gear 23 . The driven bevel gear 25 is coaxially fixedly connected to the cam rod 24 .

[0031] The dust monitor is installed on the construction site for use. The sampling head 2 sucks the atmosphere, and the dust particles in the atmosphere enter the sampling head 2. The particles are trapped on the filter paper. When the beta rays pass through the filter paper, their energy will decay. By measuring the attenuation, the mass of the particles can be calculated, and the concentration of the particles in the air can be obtained. The wind speed sensor 5 and the wind vane 6 are used to monitor the wind direction and wind speed, and analyze the air quality. The rotating protection mechanism is arranged outside the sampling head 2, and the rotating protection mechanism is adjusted according to the environmental conditions of the construction site and the wind force, etc.; If there is less light garbage at the construction site and the wind is weak, the electric slide rail 7 is operated to control the electric slider 8 to move upward, and the electric slider 8 drives the mobile frame 9 to move upward, and the rotating protection mechanism on the mobile frame 9 moves away from the sampling head 2, keeping the top of the sampling head 2 in an open state, and the sampling head 2 sucks and samples the atmospheric dust; If there is a certain amount of light garbage in the construction site, and the light garbage drifts with the environmental wind, in order to prevent the sampling head 2 from being hit or blocked by the drifting garbage, the mobile frame 9 is controlled to move downward, so that the outer protective cover 14 is protectively arranged on the outside of the sampling head 2, and the ventilation holes 33 opened on the outer protective cover 14 and the inner protective cover 18 are kept in a through state, and the positions of the large-aperture mesh covers 31 installed on the outer protective cover 14 and the inner protective cover 18 correspond to each other. At this time, the outer protective cover 14 and the inner protective cover 18 are folded and blocked on the outside of the sampling head 2, which can prevent large pieces of garbage and foreign matter from hitting and blocking the sampling head 2 under the action of wind. The inner top surface of the inner protective cover 18 is kept at a distance from the top of the sampling head 2, so that the space above the sampling head 2 is larger, so that the sampling head 2 can better suck the atmospheric dust for monitoring; If there are a lot of light and heavy garbage in the construction site, and the environmental wind force is strong, the operating cylinder 20 pushes the moving seat 21 to move, and the two ends of the push rod 22 connected between the moving seat 21 and the positioning piece 19 rotate accordingly. The rotating push rod 22 pushes the positioning piece 19 to move longitudinally, and the positioning piece 19 drives the inner gear ring 13 to move synchronously. The inner gear ring 13 is sleeved on the outside of the toothed rod 12 for engagement movement, and the inner gear ring 13 drives the outer protective cover 14 to move longitudinally synchronously, so that the outer protective cover 14 and the inner protective cover 18 move downward, expanding the protection range outside the sampling head 2. At the same time, the push rod 22 rotates downward to drive the coaxially connected driving bevel gear 23 to rotate synchronously, and the driving bevel gear 23 is meshed with the driven bevel gear 25. Under the meshing transmission, the driven bevel gear 25 is controlled to rotate, and the driven bevel gear 25 drives the cam rod 24 to rotate synchronously. The cam rod 24 rotates The positioning slide block 26 is pushed to engage in the steering slide frame 27 and slide under the rotation thrust of the cam rod 24, and the steering slide frame 27 and the swivel 17 are pushed to rotate. The swivel 17 drives the slide column 16 to engage in the annular slide groove 15 and slide accordingly. The swivel 17 is fixedly connected to the inner protective cover 18, and the inner protective cover 18 is driven to rotate correspondingly on the inner side of the outer protective cover 14, so that the inner protective cover 18 rotates and closes at the vent 33 opened on the outer protective cover 14. At this time, the outer protective cover 14 and the inner protective cover 18 rotate and close to the outside of the sampling head 2, and the protection range is more comprehensive. Most of the atmosphere sucked by the sampling head 2 passes through the large-aperture mesh cover 31 on the outer protective cover 14 and the inner protective cover 18, which can effectively isolate foreign matter and garbage drifting with the wind, and comprehensively protect the sampling head 2 from being damaged by impact or blocked by foreign matter, so as to keep the sampling head 2 effectively sucking environmental dust for monitoring.

[0032] Embodiment 2: Based on Embodiment 1, an air volume control mechanism is also disclosed, and its specific structure is as follows: The mobile frame 9 is provided with an air volume control mechanism for increasing the air flow around the sampling head 2 .

[0033] The air volume control mechanism includes an outer gear ring 28 fixed to the outside of the annular slide 102; A motor 29 is fixedly mounted on the moving frame 9 , and an output end of the motor 29 is connected to a power gear 30 , which is meshedly connected to the outer gear ring 28 .

[0034] Large-aperture mesh covers 31 are embedded and installed on the side walls of the outer protective cover 14 and the inner protective cover 18; A plurality of wind plates 32 are fixed at equal angles on the outer side wall of the outer protective cover 14 , and the wind plates 32 are distributed at upper and lower sides of the large-aperture mesh cover 31 .

[0035] In a windless environment, the gas flow around the sampling head 2 is poor, and the running motor 29 controls the power gear 30 to rotate back and forth. The side of the power gear 30 is meshed with the outer gear ring 28. Under the action of the meshing transmission, the outer gear ring 28 controls the reciprocating rotation, and the outer gear ring 28 drives the annular slide 102 to engage on the outside of the annular slide rail 101 and reciprocate. The rotation of the annular slide 102 drives the bogie 11, the toothed rod 12, the inner gear ring 13, and the outer protective cover 14 to rotate synchronously, and the wind plate 32 fixed on the outside of the outer protective cover 14 rotates synchronously with it. The rotation of the wind plate 32 accelerates the flow of surrounding gas so that the sampling head 2 can suck the atmospheric dust around the sampling.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A dust monitoring instrument for environmental protection, comprising a controller (1) for receiving dust particle monitoring signals, a sampling head (2) for sampling dust particles is fixedly connected to the controller (1), a collection bottle (3) for collecting water vapor is installed on the sampling head (2), and a support frame (4) is fixedly installed outside the lower part of the sampling head (2), a wind speed sensor (5) is fixed on one side of the upper surface of the support frame (4), and a wind vane (6) is fixed on the other side of the upper surface of the support frame (4), characterized in that: Two sets of electric slide rails (7) are fixed on the back of the controller (1), an electric slider (8) is slidably mounted on the electric slide rail (7), a moving frame (9) is fixedly mounted on the electric slider (8), an annular slide rail (101) is fixed on the upper end of the moving frame (9), an annular slide rail (102) is slidably mounted on the annular slide rail (101), and a bogie (11) is fixedly mounted on the annular slide rail (102); The bogie (11) is provided with a rotating protection mechanism for protecting the sampling area of ​​the sampling head (2).

2. The dust monitoring device for environmental protection according to claim 1, characterized in that: The rotary protection mechanism comprises a toothed rod (12) fixed on the bogie (11), wherein an outer sliding sleeve of the toothed rod (12) is provided with an inner toothed ring (13), and an outer protection cover (14) is fixedly mounted on the outer side of the inner toothed ring (13); The upper surface of the outer protective cover (14) is provided with a plurality of annular sliding grooves (15) at equal angles, a sliding column (16) is slidably connected in the annular sliding groove (15), and a rotating ring (17) is fixed on the upper and lower surfaces of the sliding column (16); The two rotating rings (17) are respectively attached to the upper and lower ends of the upper surface of the outer protective cover (14), and the inner protective cover (18) is fixedly mounted on the rotating ring (17) at the lower end.

3. The dust monitoring device for environmental protection according to claim 2, characterized in that: The inner wall of the outer protective cover (14) and the outer wall of the inner protective cover (18) are in contact with each other; The inner protective cover (18) and the outer protective cover (14) are provided with a plurality of ventilation openings (33) at equal angles, and the positions of the ventilation openings (33) provided on the inner protective cover (18) and the outer protective cover (14) are connected and correspond to each other.

4. The dust monitoring device for environmental protection according to claim 2, characterized in that: Positioning plates (19) are symmetrically fixed on both sides of the outer side of the inner gear ring (13); A cylinder (20) is fixedly mounted on the upper surface of the bogie (11), and a moving seat (21) is fixed to the output end of the cylinder (20). A push rod (22) is rotatably mounted on the moving seat (21), and the other end of the push rod (22) is rotatably connected to a positioning plate (19).

5. The dust monitoring device for environmental protection according to claim 4, characterized in that: The positioning piece (19) is provided with a steering mechanism for driving the inner protective cover (18) to rotate, and the rotation of the inner protective cover (18) can adjust the flow rate of gas in the sampling area of ​​the sampling head (2).

6. The dust monitoring device for environmental protection according to claim 5, characterized in that: The steering mechanism comprises a steering slide frame (27) fixed on a rotating ring (17) above the outer protective cover (14); a cam rod (24) is rotatably mounted on the positioning plate (19); a positioning slide block (26) is fixed on the cam rod (24); and the cam rod (24) is slidably connected to the steering slide frame (27) via the positioning slide block (26).

7. The dust monitoring device for environmental protection according to claim 6, characterized in that: A driving bevel gear (23) is fixedly connected below the push rod (22) along the direction of the rotation axis of the positioning plate (19), a driven bevel gear (25) is meshedly connected next to the driving bevel gear (23), and the driven bevel gear (25) is coaxially fixedly connected to the cam rod (24).

8. The dust monitoring device for environmental protection according to claim 2, characterized in that: The mobile frame (9) is provided with an air volume control mechanism for increasing the air flow around the sampling head (2).

9. The dust monitoring device for environmental protection according to claim 8, characterized in that: The air volume control mechanism comprises an outer gear ring (28) fixed outside the annular slide (102); A motor (29) is fixedly mounted on the moving frame (9), an output end of the motor (29) is connected to a power gear (30), and the power gear (30) is meshingly connected to the outer gear ring (28).

10. The dust monitoring device for environmental protection according to claim 9, characterized in that: Large-aperture mesh covers (31) are embedded and mounted on the side walls of the outer protective cover (14) and the inner protective cover (18); A plurality of wind plates (32) are fixed at equal angles on the outer side wall of the outer protective cover (14), and the wind plates (32) are distributed at upper and lower sides of the large-aperture mesh cover (31).

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