A dust monitoring device and monitoring method for environmental supervision at a construction site

Abstract

This application relates to the technical field of dust monitoring, in particular to a dust monitoring device and a monitoring method for environmental supervision at a construction site, including a collection cylinder. A filter plate is installed inside the collection cylinder, and a plurality of filter holes are evenly opened on the filter plate. The filter plate divides the inner wall of the collection cylinder into a first cavity and a second cavity. A through groove is opened at the bottom of the collection cylinder and located in the first cavity. A drying tube and an anti-blocking mechanism are also installed on the collection cylinder. In the drying tube designed in the present invention, the resistance wire surrounding the drying tube heats the drying tube after being energized, thereby increasing the temperature inside the drying tube, and then heating the gas passing through the inside of the drying tube, avoiding the combination of dust and water vapor in the air in humid weather, resulting in dust adhesion inside the device and the possible reduction of the dust content in the air, and improving the monitoring accuracy.

Description

Technical Field

[0001] This application relates to the technical field of environmental dust monitoring at construction sites, and particularly to a dust monitoring device and a monitoring method for environmental supervision at construction sites. Background Art

[0002] At construction sites, due to factors such as soil and ground particles, handling and construction of building materials, and dust raised by vehicle transportation, the dust in the air at construction sites is relatively large. Therefore, dust poses a potential threat to the health and safety of workers. Thus, it is very important to monitor dust in the construction site environment. Usually, methods such as air quality monitor monitoring, particulate deposition monitoring, and working environment monitoring are used to monitor and process the dust in the air.

[0003] For example, the patent application with the publication number CN218331108U discloses an air dust monitoring device, including a housing. Mounting frames are fixedly connected to the outer walls on both sides of the housing. An air inlet is provided on one outer wall of the housing, and a filtering mechanism is fixedly connected to the inner wall of the air inlet. An air outlet is provided on one outer wall of the housing, and a fan is fixedly connected to the inner wall of the air outlet. A partition is fixedly connected to the inner wall of the housing, and a round opening is provided on one outer wall of the partition. An air detection probe is arranged on the inner wall of the round opening. The filtering mechanism includes a filtering sleeve, and a round groove is provided on one outer wall of the filtering sleeve. A filter screen is fixedly connected to the inner wall of the round groove. This prior art overcomes the deficiencies of the prior art. Through the setting of the filtering mechanism, it is convenient to filter the air entering the housing. At the same time, a cleaning mechanism is arranged in the filtering mechanism. Through the setting of the cleaning mechanism, it is convenient to clean the impurities adhered to the filter screen, thereby preventing the filter screen from being blocked.

[0004] Although the above patent application can clean the impurities adhered to the filter screen, there are still the following problems: 1. During the cleaning process of the filter screen in the above patent application, only the impurities attached to the surface of the filter screen are cleaned by a scraper. Since the airflow drives the impurities and they may still be stuck in the mesh holes of the filter screen, the scraper may not be able to completely clean the impurities stuck in the mesh holes of the filter screen, affecting the filtering effect of the filter screen on impurities.

[0005] 2. When monitoring dust in humid weather, the humid air will cause the dust to adhere to the filter screen, thereby causing the blockage of the filter screen. At the same time, the humid air will drive the dust to adhere to the inner wall of the device, resulting in a decrease in the dust content in the gas entering the device interior and affecting the dust monitoring accuracy.

[0006] Based on this, under the above statements, there is still room for improvement in the prior art's dust monitoring methods for environmental supervision at construction sites. Summary of the Invention

[0007] To solve the above technical problems, the present application provides a dust monitoring device and a monitoring method for environmental supervision at a construction site, adopting the following technical solutions:

[0008] In a first aspect, a dust monitoring device for environmental supervision at a construction site includes a collection cylinder. A filter plate is installed inside the collection cylinder, and a plurality of filter holes are evenly formed in the filter plate. The filter plate divides the inner wall of the collection cylinder into a first cavity and a second cavity. A through groove is formed at the bottom of the collection cylinder located in the first cavity, and a drying pipe and an anti-blocking mechanism are further installed on the collection cylinder.

[0009] The drying pipe is installed at the end of the collection cylinder and is connected to the inside of the collection cylinder in a through manner.

[0010] The anti-blocking mechanism includes: a rotating shaft, which extends along the axis of the collection cylinder and is rotatably installed through the middle of the filter plate by means of a bearing.

[0011] A moving circular block is arranged inside the first cavity of the rotating shaft and reciprocates along the rotating shaft.

[0012] A plurality of extension rods are provided and are circumferentially and evenly installed on the circumferential surface of the moving circular block. A plurality of fixed short rods that cooperate with the filter holes are evenly installed on the side of the extension rod close to the filter plate along the length direction of the extension rod.

[0013] Preferably, a heating sleeve is installed on the outer wall of the drying pipe, and a resistance wire in a spiral structure that surrounds the drying pipe is arranged inside the heating sleeve.

[0014] Preferably, one end of the rotating shaft away from the drying pipe penetrates and rotates on the end of the collection cylinder, and a driving motor for driving its rotation is installed at the end of the rotating shaft away from the drying pipe. An annular block is installed on the circumferential surface of the rotating shaft inside the second cavity, and a plurality of scraping plates evenly distributed in the circumferential direction are installed on the circumferential surface of the annular block.

[0015] Preferably, a plurality of annular plates are slidably arranged on the inner wall of the drying pipe, and the annular plates are connected to each other through connecting rods. Connecting protrusions are arranged on the inner wall of the drying pipe. An elastic rope for resetting it is installed on the annular plate far from the collection cylinder, and one end of the elastic rope away from the annular plate is installed on the connecting protrusion. A guiding inclined surface is formed on the side of the annular plate far from the collection cylinder.

[0016] Preferably, a linkage shaft is rotatably installed through the end of the collection cylinder where the drying pipe is installed. A linkage gear is installed on the circumferential surface of the linkage shaft located in the second cavity. An incomplete gear meshing with the linkage gear is installed on the rotating shaft. A connecting rope is wound around the circumferential surface of the linkage shaft outside the collection cylinder, and one end of the connecting rope away from the linkage shaft passes through the drying pipe and is installed on the annular plate close to the collection cylinder.

[0017] Preferably, an annular frame is installed at one end of the extension rod away from the moving round block, and the annular frame is slidably arranged on the inner wall of the first cavity, a bidirectional thread is provided on the rotating shaft, and the moving round block cooperates with the bidirectional thread.

[0018] Preferably, the filter plate is installed with an arc plate 1 at the bottom of the end surface located inside the second cavity, an arc plate 2 matching with the arc plate 1 is installed at the bottom of the inner wall of the second cavity, and a gap is formed between the arc plate 1 and the arc plate 2, and a through arc groove matching with the gap is installed at the bottom of the collecting tube.

[0019] Preferably, an L-shaped air inlet pipe is provided at one end of the drying tube away from the collecting tube, the horizontal section of the air inlet pipe is rotatably mounted on the drying tube, a ratchet is installed on the horizontal section of the air inlet pipe, a vertical protrusion is provided on the drying tube, and a pawl matching the ratchet is installed on the vertical protrusion.

[0020] Preferably, the rotating shaft is located on the inner circumferential surface of the first cavity and is provided with connecting frames symmetrically arranged along the length direction of the rotating shaft, and a cleaning plate is commonly installed at one end of the two connecting frames away from the rotating shaft.

[0021] In a second aspect, a dust monitoring method for environmental supervision at a construction site is provided, and its use method comprises the following steps: S1: pretreatment, moving the device to the area to be monitored and fixing it at a designated position.

[0022] S2: air intake processing, the first cavity is evacuated by an existing air pump, and then the pressure difference between the inside and outside of the collecting tube causes the gas to enter the inside of the collecting tube through the drying tube.

[0023] S3: Gas collection process: the gas passes through the second cavity and the filter plate in sequence and then enters the first cavity. The gas gathers inside the first cavity. At this time, the dust particles suspended in the gas fall on the inner wall of the first cavity.

[0024] S4: Unclogging treatment: during the gas flow, a short rod is fixed to unblock the filter holes.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. In the drying tube designed by the present invention, the resistance wire surrounding the drying tube heats the drying tube after being energized, thereby increasing the temperature inside the drying tube, thereby heating the gas passing through the drying tube, preventing the dust from combining with water vapor in the air in humid weather to cause the dust to adhere to the inside of the device, resulting in the possibility of reducing the dust content in the air, thereby improving the monitoring accuracy.

[0027] 2. In the anti-blocking mechanism designed by the present invention, during the reciprocating movement of the moving circular block on the rotating shaft, the fixed short rod is driven to move through the extension rod. During the movement of the fixed short rod, the filter holes can be reciprocally inserted and extracted, so that the fixed short rod can clean the impurities clamped in the filter holes, avoiding the possibility of impurities in the air being clamped in the filter holes and improving the permeability of the filter holes.

[0028] 3. The annular plate and the connecting rod designed by the present invention can cooperate with each other to scrape and friction-treat the dust adhering to the inner wall of the drying pipe, avoiding the possibility that dust adheres to the inner wall of the drying pipe and reduces the dust content in the air, and improving the monitoring accuracy. Description of the Drawings

[0029] Figure 1 is a schematic three-dimensional structure diagram of the present invention.

[0030] Figure 2 is a schematic internal first three-dimensional structure diagram of the present invention.

[0031] Figure 3 is the present invention Figure 2 partial enlarged view at A in

[0032] Figure 4 is a schematic three-dimensional installation structure diagram between the drying pipe and the heating sleeve, etc. of the present invention.

[0033] Figure 5 is the present invention Figure 4 partial enlarged view at B in

[0034] Figure 6 is a schematic internal second three-dimensional structure diagram of the present invention.

[0035] Figure 7 is a schematic three-dimensional installation structure diagram between the rotating shaft, the extension rod and the annular frame, etc. of the present invention.

[0036] Figure 8 is a schematic three-dimensional structure diagram of the interior of the drying pipe of the present invention.

[0037] Figure 9 is the present invention Figure 8 partial enlarged view at C in

[0038] Figure 10 is a schematic three-dimensional installation structure diagram between the rotating shaft, the connecting frame and the cleaning plate, etc. of the present invention.

[0039] Figure 11 is a schematic internal structure diagram of the cleaning plate of the present invention.

[0040] Figure 12 is a flowchart of the dust monitoring method for environmental supervision at the construction site of the present invention.

[0041] Description of the reference numerals: 1. Collection cylinder; 11. First cavity; 12. Second cavity; 121. First arc plate; 122. Second arc plate; 123. Through arc groove; 13. Through groove; 2. Filter plate; 3. Drying pipe; 31. Heating sleeve; 32. Resistance wire; 33. Air inlet pipe; 34. Ratchet; 35. Pawl; 4. Anti-blocking mechanism; 41. Rotating shaft; 411. Driving motor; 412. Annular block; 413. Scraper; 414. Connecting frame; 415. Cleaning plate; 416. Cleaning connecting plate; 417. Reset spring rod; 42. Moving round block; 43. Extension rod; 431. Annular frame; 44. Fixed short rod; 5. Annular plate; 51. Elastic rope; 52. Linkage shaft; 53. Linkage gear; 54. Incomplete gear; 55. Connecting rope; 6. Fan blade; 61. Commutating pipe. Detailed implementation mode

[0042] The following further describes the present application in detail with reference to the attached Figures 1 to 12 drawings.

[0043] The embodiment of the present application discloses a dust monitoring device and a monitoring method for environmental supervision at a construction site, which dries the air to prevent dust from adhering to the inside of the device due to the combination of dust and water vapor in the air in humid weather, and at the same time can clean the filter plate.

[0044] Embodiment 1:

[0045] Refer to Figure 1 , a dust monitoring device for environmental supervision at a construction site, including a collection cylinder 1, a filter plate 2 is installed inside the collection cylinder 1, a plurality of filter holes 21 are uniformly opened on the filter plate 2, the filter plate 2 divides the inner wall of the collection cylinder 1 into a first cavity 11 and a second cavity 12, a through groove 13 is opened at the bottom of the collection cylinder 1 and located in the first cavity 11, the gas inside the first cavity 11 moves out from the through groove 13 and is collected, and a drying pipe 3 and an anti-blocking mechanism 4 are also installed on the collection cylinder 1.

[0046] The drying pipe 3 is installed at the end of the collection cylinder 1 and is connected to the inside of the collection cylinder 1 in a through manner.

[0047] The temperature inside the drying pipe 3 rises due to heat, so as to heat the gas passing through the inside of the drying pipe 3, avoid the combination of dust and water vapor in the air in humid weather resulting in dust adhering to the inside of the device, causing the possible reduction of the dust content in the air, and improving the monitoring accuracy.

[0048] Refer to Figure 2 and Figure 3 , the anti-blocking mechanism 4 includes: a rotating shaft 41, which extends along the axis of the collection cylinder 1 and is rotatably installed through the middle of the filter plate 2 by means of a bearing.

[0049] The moving circular block 42 is arranged inside the first cavity 11 on the rotating shaft 41 and reciprocates along the rotating shaft 41.

[0050] There are multiple extension rods 43, which are circumferentially and evenly installed on the circumferential surface of the moving circular block 42. On the side of the extension rod 43 close to the filter plate 2, multiple fixed short rods 44 that cooperate with the filter holes 21 are evenly installed along the length direction of the extension rod 43.

[0051] During the reciprocating movement of the moving circular block 42 on the rotating shaft 41, the fixed short rods 44 are driven to move through the extension rods 43. During the movement of the fixed short rods 44, the filter holes 21 can be reciprocally inserted and pulled out, so that the fixed short rods 44 can clean the impurities clamped in the filter holes 21, avoiding the possibility of impurities in the air being clamped in the filter holes 21 and improving the permeability of the filter holes 21.

[0052] Refer to Figure 2 、 Figure 4 and Figure 5 A heating sleeve 31 is installed on the outer wall of the drying pipe 3. A resistance wire 32 in a spiral structure that surrounds the drying pipe 3 is arranged inside the heating sleeve 31.

[0053] One end of the drying pipe 3 far from the collection cylinder 1 is provided with an L-shaped intake pipe 33. The horizontal section of the intake pipe 33 is rotatably installed on the drying pipe 3. A ratchet 34 is installed on the horizontal section of the intake pipe 33. A vertical protrusion is arranged on the drying pipe 3, and a pawl 35 that cooperates with the ratchet 34 is installed on the vertical protrusion.

[0054] In the initial state, the through groove 13 is blocked with a sealing plug, and the air inside the first cavity 11 is exhausted through an existing air pump. At this time, there is a pressure difference between the collection cylinder 1 and the outside. Then the resistance wire 32 is powered on. At this time, the resistance wire 32 generates heat. The heated resistance wire 32 can heat the drying pipe 3, so that the temperature inside the drying pipe 3 rises. Specifically, during operation, the device is moved to a specified position and fixed. Since there is a pressure difference between the collection cylinder 1 and the external environment, the air in the external environment enters the drying pipe 3 through the intake pipe 33 at this time. At this time, the heated drying pipe 3 can heat and dry the air entering the drying pipe 3. The heated and dried air enters the second cavity 12, avoiding the possibility that dust adheres to the inside of the device due to the combination of dust and water vapor in the air in humid weather, reducing the dust content in the air, improving the monitoring accuracy, and at the same time reducing the blockage of the filter holes 21 caused by the combination of humid air and dust.

[0055] Before the gas enters the intake pipe 33, according to the position of the air to be collected, the intake pipe 33 is manually rotated so that the position of the air inlet of the intake pipe 33 can be changed. Thus, the intake pipe 33 can collect and process the air at different positions, increasing the sample size of the monitoring data and making the detection data more representative.

[0056] After the air enters the interior of the second cavity 12, it flows through the filter plate 2 to the interior of the first cavity 11. During the process of the gas passing through the filter plate 2, the filter holes 21 can isolate impurities (such as leaves) in the air, so that the impurities remain inside the first cavity 11.

[0057] During the air flow, the moving block 42 moves towards the filter plate 2 by an external force. During the movement of the moving block 42, the extension rod 43 moves synchronously. During the movement of the extension rod 43, the fixed short rod 44 moves synchronously. During the movement of the fixed short rod 44 towards the filter plate 2, it enters the interior of the filter hole 21. Thus, the fixed short rod 44 can push the impurities stuck in the filter hole 21 into the second cavity 12.

[0058] During the air collection process, when the extension rod 43 moves towards the filter plate 2, it never touches the filter plate 2, that is, the filter hole 21 is always in a through state, avoiding the situation that when the extension rod 43 blocks the filter hole 21 and the existing air pump still discharges the air inside the first cavity 11 outward, resulting in a large pressure difference between the inside and outside of the first cavity 11, and further causing damage to the collection cylinder 1.

[0059] When the fixed short rod 44 passes through the filter hole 21, then the moving block 42 is reset. During the reset process of the moving block 42, the fixed short rod 44 is synchronously driven by the extension rod 43 to reset. By repeating the above actions, during the movement of the fixed short rod 44, it can reciprocally insert into and withdraw from the filter hole 21 and clean the impurities inside the filter hole 21.

[0060] Refer to Figure 6 , one end of the rotating shaft 41 away from the drying tube 3 penetrates and rotates on the end of the collection cylinder 1, and a driving motor 411 for driving its rotation is installed at the end of the rotating shaft 41 away from the drying tube 3. An annular block 412 is installed on the circumferential surface of the rotating shaft 41 located inside the second cavity 12, and a plurality of evenly circumferentially distributed scraping plates 413 are installed on the circumferential surface of the annular block 412.

[0061] During the air flow, the driving motor 411 is synchronously started. During the rotation of the output shaft of the driving motor 411, the rotating shaft 41 is driven to rotate. During the rotation of the rotating shaft 41, the annular block 412 rotates synchronously. During the rotation of the annular block 412, the scraping plates 413 rotate. During the rotation of the scraping plates 413, it can clean the impurities attached to the side of the filter plate 2 close to the second cavity 12 and scrape the impurities cleared from the filter hole 21, avoiding the possibility of the filter hole 21 being blocked by impurities.

[0062] At the same time, the scraping plates 413 can also scrape and remove the dust attached to the filter plate 2 again, so that the dust on the filter plate 2 re-enters the second cavity 12 and enters the first cavity 11 through the filter hole 21 during the subsequent air flow process.

[0063] Refer toFigure 7 One end of the extension rod 43 away from the moving circular block 42 is commonly provided with an annular frame 431, and the annular frame 431 is limited and slidably arranged on the inner wall of the first cavity 11. A bidirectional thread is provided on the rotating shaft 41, and the moving circular block 42 is matched with the bidirectional thread.

[0064] During specific operation, during the rotation of the rotating shaft 41, the moving circular block 42 is driven by the bidirectional thread to reciprocate on the rotating shaft 41. Then, without external drive, the moving circular block 42 drives the fixed short rod 44 to reciprocally insert and extract inside the filter hole 21 through the extension rod 43 and clean the impurities inside the filter hole 21. The annular frame 431 can not only play a role in stabilizing the extension rod 43 during the movement of the extension rod 43, reducing the possibility of the extension rod 43 shaking, but also play a limiting role on the extension rod 43 to ensure that the extension rod 43 will not rotate relative to the rotating shaft 41.

[0065] Refer to Figure 6 、 Figure 8 and Figure 9 As dust may also adhere to the inner wall of the drying tube 3 when the humid air enters the drying tube 3 for drying, the annular plate 5 provided by the present invention can clean the dust adhering to the drying tube 3. Specifically, a plurality of annular plates 5 are slidably arranged on the inner wall of the drying tube 3, and the annular plates 5 are connected to each other through connecting rods. Connecting protrusions are provided on the inner wall of the drying tube 3. An elastic cord 51 for resetting it is installed on the annular plate 5 away from the collecting cylinder 1, and one end of the elastic cord 51 away from the annular plate 5 is installed on the connecting protrusion. A guiding inclined surface is provided on the side of the annular plate 5 away from the collecting cylinder 1.

[0066] During specific operation, the annular plate 5 away from the air inlet pipe 33 is pulled by an external force to move. During the movement of the annular plate 5, the remaining annular plates 5 are driven through the connecting rod. During the movement of the annular plate 5, the dust on the inner wall of the drying tube 3 can be scraped off. At this time, the elastic cord 51 is in a stretched state. When the annular plate 5 moves to the length of the connecting rod, the moving area of the annular plate 5 covers the entire inner wall of the drying tube 3. Then, there is no residual dead angle of dust on the inner wall of the drying tube 3. At this time, the annular plate 5 is released, and the elastic cord 51 is reset at this time and drives the remaining annular plates 5 to reset through the connecting rod. When the annular plate 5 is reset, the annular plate 5 away from the air inlet pipe 33 is pulled to move again. Then, through the above steps, the annular plate 5 can be driven to reciprocally scrape the dust adhering to the inner wall of the drying tube 3. The scraped dust is driven by the subsequent air to enter the second cavity 12.

[0067] The guiding inclined surface provided on the annular plate 5 plays a guiding role for the dust when the dust scraped off is driven by the subsequent air to enter the second cavity 12, so that the dust can smoothly cross the annular plate 5 and enter the second cavity 12, avoiding the possibility of dust accumulation inside the drying tube 3.

[0068] In order to reduce the use of external force, the traction rope provided by the present invention can drive the annular plate 5 to reciprocate without applying external force. Specifically, the end of the collecting cylinder 1 where the drying pipe 3 is installed penetrates and is rotatably installed with a linkage shaft 52. A linkage gear 53 is installed on the circumferential surface of the linkage shaft 52 in the second cavity 12. An incomplete gear 54 meshing with the linkage gear 53 is installed on the rotating shaft 41. A connecting rope 55 is wound around the circumferential surface of the linkage shaft 52 outside the collecting cylinder 1. One end of the connecting rope 55 away from the linkage shaft 52 passes through the drying pipe 3 and is installed on the annular plate 5 near the collecting cylinder 1.

[0069] During specific operation, when the rotating shaft 41 rotates, it drives the incomplete gear 54 to rotate. When the teeth on the incomplete gear 54 mesh with the linkage gear 53, at this time, the incomplete gear 54 and the linkage gear 53 mesh with each other to drive the linkage shaft 52 to rotate. During the rotation of the linkage shaft 52, the connecting rope 55 is wound. During the winding process of the connecting rope 55, it drives the annular plate 5 away from the air inlet pipe 33 to move. During the movement of the annular plate 5, it drives the remaining annular plates 5 to move through the connecting rod. During the movement of the annular plate 5, the dust on the inner wall of the drying pipe 3 can be scraped off. When the teeth on the incomplete gear 54 disengage from the linkage gear 53, at this time, the incomplete gear 54 and the linkage gear 53 no longer mesh, and at this time, the linkage shaft 52 is no longer stressed. The elastic rope 51 is reset at this time and drives the remaining annular plates 5 to reset through the connecting rod. When the annular plate 5 is reset, it pulls the annular plate 5 away from the air inlet pipe 33 to move again. Then, through the above steps, the annular plate 5 can be driven to reciprocally scrape the dust attached to the inner wall of the drying pipe 3.

[0070] Furthermore, through the above method, the annular plate 5 can be driven to reciprocate without using an external drive.

[0071] Looking back Figure 6 , an arc-shaped plate one 121 is installed at the bottom of the end face of the filter plate 2 inside the second cavity 12. An arc-shaped plate two 122 matching with the arc-shaped plate one 121 is installed at the bottom of the inner wall of the second cavity 12. A gap is formed between the arc-shaped plate one 121 and the arc-shaped plate two 122. A through arc-shaped groove 123 matching with the gap is installed at the bottom of the collecting cylinder 1.

[0072] On one side of the first arc-shaped plate 121 away from the filter plate 2, an inclined slope is provided. After the impurities scraped by the scraper 413 fall on the first arc-shaped plate 121, it can guide the impurities. Inclined slopes are also provided on both sides of the second arc-shaped plate 122. The inclined slope of the second arc-shaped plate 122 close to the filter plate 2 can make way for the scraped impurities. The inclined slope of the second arc-shaped plate 122 away from the filter plate 2 can guide the dust at the bottom of the second cavity 12, avoiding the deposition of dust inside the second cavity 12. At the same time, when the dust is lifted on the inclined slope of the second arc-shaped plate 122 away from the filter plate 2, it can be at a certain distance from the gap, avoiding the dust falling into the gap. And at the starting position, the through arc-shaped groove 123 is sealed. During specific operation, since the air inside the collection cylinder 1 is in a flowing state and the dust particles are small, during the air flow, the dust and impurities always adhere to the filter plate 2 and will not fall into the gap. When the collection cylinder 1 no longer collects air, that is, the sampling is completed, at this time, the air inside the collection cylinder 1 no longer flows. During the rotation of the rotating shaft 41, the filter holes 21 are blocked by moving the round block 42 and driving the extension rod 43. At this time, the first cavity 11 and the second cavity 12 are isolated from each other. The impurities and dust scraped on the filter plate 2 will fall into the gap immediately because they are not driven by air. At this time, opening the through arc-shaped groove 123 can remove the impurities in the gap.

[0073] Refer to Figure 10 and Figure 11 On the circumferential surface of the first cavity 11, the rotating shaft 41 is provided with connecting frames 414 symmetrically arranged along the length direction of the rotating shaft 41. At the ends of the two connecting frames 414 away from the rotating shaft 41, a cleaning plate 415 is jointly installed.

[0074] On one side of the cleaning plate 415 close to the inner wall of the first cavity 11, bristles are provided. On one side of the cleaning plate 415 close to the filter plate 2, a cleaning connecting plate 416 is slidably arranged along its length direction. And a reset spring rod 417 is jointly installed between the cleaning connecting plate 416 and the cleaning plate 415. On one side of the cleaning connecting plate 416 close to the inner wall of the first cavity 11, bristles are also provided. And the cleaning connecting plate 416 always abuts against the annular frame 431, that is, the reset spring rod 417 is always in a compressed state. During specific operation, during the rotation of the rotating shaft 41, the cleaning plate 415 is driven by the connecting frame 414 to rotate circumferentially. During the circumferential rotation of the cleaning plate 415, the bristles at the bottom of it can clean the dust attached to the inner wall of the first cavity 11 and fall into the through groove 13, thereby reducing the possibility of errors in monitoring caused by the reduction of the dust content in the air to be monitored due to the dust adhering to the inner wall of the first cavity 11.

[0075] When the annular frame 431 moves towards the filter plate 2, the cleaning connecting plate 416 moves synchronously due to the action of the reset spring rod 417. Furthermore, the cleaning connecting plate 416 and the bristles cooperate with each other to clean the part not contacted by the cleaning plate 415, with stronger applicability.

[0076] Example 2: Reference Figure 6 On the basis of the first embodiment, the present invention further provides a fan blade 6, which can assist in driving the rotating shaft 41 to rotate. Specifically, the fan blade 6 is installed at one end of the circumferential surface of the rotating shaft 41 close to the drying tube 3, and a reversing tube 61 is installed on one end of the drying tube 3 located inside the second cavity 12, and the air outlet of the reversing tube 61 faces the fan blade 6. During specific operation, the air flows into the reversing tube 61 after passing through the drying tube 3. Since the reversing tube 61 is thin, the gas flow rate escaping from the reversing tube 61 is faster. When the gas flow rate reaches a certain speed, it is not driven by the driving motor 411 at this time. The gas escaping from the annular tube can also blow the fan blade 6 to rotate. The rotation of the fan blade 6 can drive the rotating shaft 41 to rotate, thereby reducing the use of the drive.

[0077] Finally, see Figure 12 , the present invention also provides a dust monitoring method for construction site environmental supervision, and its use method includes the following steps: S1: pretreatment, moving the device to the area to be monitored and fixing it at a designated position.

[0078] S2: air intake treatment, the first cavity 11 is evacuated by the existing air pump, and the air enters the drying tube 3 from the air intake pipe 33. The heated drying tube 3 can heat and dry the air entering the drying tube 3, and the heated and dried air enters the second cavity 12. The rotating shaft 41 drives the incomplete gear 54 to rotate during the rotation. When the gear teeth on the incomplete gear 54 are meshed with the linkage gear 53, the incomplete gear 54 and the linkage gear 53 are meshed with each other to drive the linkage shaft 52 to rotate. During the rotation of the linkage shaft 52, the connecting rope 55 is wound. During the winding process of the connecting rope 55, the annular plate 5 away from the air intake pipe 33 is driven to move. During the movement of the annular plate 5, the remaining annular plates 5 are driven to move through the connecting rod. During the movement of the annular plate 5, the dust on the inner wall of the drying tube 3 can be scraped off.

[0079] S3: Gas collection and processing. After entering the second cavity 12 , the air flows to the first cavity 11 through the filter plate 2 . When the gas passes through the filter plate 2 , the filter holes 21 can isolate impurities (such as leaves) in the air, so that the impurities remain in the first cavity 11 .

[0080] S4: Unblocking treatment. During the air flow, the moving round block 42 is moved toward the side of the filter plate 2 by external force. During the movement of the moving round block 42, the extension rod 43 is driven to move synchronously. During the movement of the extension rod 43, the fixed short rod 44 is driven to move synchronously. The fixed short rod 44 enters the filter hole 21 during the movement toward the side of the filter plate 2, and then the fixed short rod 44 can push the impurities stuck in the filter hole 21 into the second cavity 12.

[0081] The embodiments of the specific implementation manners are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A dust monitoring device for environmental supervision at a construction site, comprising a collection cylinder (1), characterized in that: A filter plate (2) is installed inside the collection cylinder (1). A plurality of filter holes (21) are evenly formed in the filter plate (2). The filter plate (2) divides the inner wall of the collection cylinder (1) into a first cavity (11) and a second cavity (12). A through groove (13) is formed at the bottom of the collection cylinder (1) and located in the first cavity (11). A drying pipe (3) and an anti-blocking mechanism (4) are also installed on the collection cylinder (1), where: The drying pipe (3) is installed at the end of the collection cylinder (1) and is connected to the inside of the collection cylinder (1) in a through manner; The anti-blocking mechanism (4) includes: A rotating shaft (41), which extends along the axis direction of the collection cylinder (1) and is rotatably installed through the middle of the filter plate (2) by means of a bearing; A moving circular block (42), which is arranged inside the first cavity (11) of the rotating shaft (41) and reciprocates along the rotating shaft (41); A plurality of extension rods (43), which are circumferentially and evenly installed on the circumferential surface of the moving circular block (42). A plurality of fixed short rods (44) that cooperate with the filter holes (21) are evenly installed on the side of the extension rod (43) close to the filter plate (2) along the length direction of the extension rod (43); A plurality of annular plates (5) are slidably arranged on the inner wall of the drying pipe (3). The annular plates (5) are connected to each other by connecting rods. A connecting protrusion is arranged on the inner wall of the drying pipe (3). An elastic cord (51) for resetting it is installed on the annular plate (5) far from the collection cylinder (1). One end of the elastic cord (51) far from the annular plate (5) is installed on the connecting protrusion. A guiding inclined surface is formed on the side of the annular plate (5) far from the collection cylinder (1); The end of the collection cylinder (1) where the drying pipe (3) is installed is rotatably installed through a linkage shaft (52). A linkage gear (53) is installed on the circumferential surface of the linkage shaft (52) located in the second cavity (12). An incomplete gear (54) that meshes with the linkage gear (53) is installed on the rotating shaft (41). A connecting cord (55) is wound around the circumferential surface of the linkage shaft (52) located outside the collection cylinder (1). One end of the connecting cord (55) far from the linkage shaft (52) passes through the drying pipe (3) and is installed on the annular plate (5) close to the collection cylinder (1); A fan blade (6) is installed at one end of the circumferential surface of the rotating shaft (41) close to the drying pipe (3). A reversing pipe (61) is installed at one end of the drying pipe (3) located inside the second cavity (12), and the air outlet of the reversing pipe (61) faces the fan blade (6).

2. The dust monitoring device for environmental supervision at a construction site according to claim 1, wherein: A heating sleeve (31) is installed on the outer wall of the drying pipe (3). A resistance wire (32) in a spiral structure that surrounds the drying pipe (3) is arranged inside the heating sleeve (31).

3. The dust monitoring device for environmental supervision at a construction site according to claim 1, characterized in that: One end of the rotating shaft (41) far from the drying pipe (3) is rotatably penetrated through the end of the collection cylinder (1), and a driving motor (411) for driving its rotation is installed at one end of the rotating shaft (41) far from the drying pipe (3). An annular block (412) is installed on the circumferential surface of the rotating shaft (41) located inside the second cavity (12). A plurality of scraping plates (413) evenly distributed in the circumferential direction are installed on the circumferential surface of the annular block (412).

4. The dust monitoring device for environmental supervision at a construction site according to claim 1, characterized in that: The end of the extension rod (43) away from the moving round block (42) is jointly installed with an annular frame (431), and the annular frame (431) is limitedly slidably arranged on the inner wall of the first cavity (11), and a bidirectional thread is provided on the rotating shaft (41), and the moving round block (42) cooperates with the bidirectional thread.

5. The dust monitoring device for environmental supervision at a construction site according to claim 1, characterized in that: The filter plate (2) is provided with an arc-shaped plate 1 (121) at the bottom of the end surface located inside the second cavity (12), and an arc-shaped plate 2 (122) matching with the arc-shaped plate 1 (121) is provided at the bottom of the inner wall of the second cavity (12), and a gap is formed between the arc-shaped plate 1 (121) and the arc-shaped plate 2 (122), and a penetrating arc-shaped groove (123) matching with the gap is provided at the bottom of the collecting tube (1).

6. The dust monitoring device for environmental supervision at a construction site according to claim 1, characterized in that: An L-shaped air intake pipe (33) is arranged at one end of the drying pipe (3) away from the collecting tube (1); a horizontal section of the air intake pipe (33) is rotatably mounted on the drying pipe (3); a ratchet (34) is mounted on the horizontal section of the air intake pipe (33); a vertical protrusion is arranged on the drying pipe (3); a ratchet pawl (35) matching with the ratchet (34) is mounted on the vertical protrusion.

7. The dust monitoring device for environmental supervision at a construction site according to claim 1, characterized in that: The rotating shaft (41) is located on the inner circumferential surface of the first cavity (11) and is provided with connecting frames (414) symmetrically arranged along the length direction of the rotating shaft (41), and a cleaning plate (415) is commonly provided at one end of the two connecting frames (414) away from the rotating shaft (41).

8. A dust monitoring method for environmental supervision at a construction site, including a dust monitoring device for environmental supervision at a construction site according to any one of claims 1-7, characterized in that, The method of use includes the following steps: S1: Pre-processing, moving the device to the area to be monitored and fixing it at the designated location; S2: air intake processing, evacuating the first cavity (11) by using an existing air pump, and then the pressure difference between the inside and outside of the collecting tube (1) causes the gas to enter the interior of the collecting tube (1) through the drying tube (3); S3: gas collection processing, the gas passes through the second cavity (12) and the filter plate (2) in sequence and then enters the first cavity (11), the gas is collected inside the first cavity (11), and the dust particles suspended in the gas fall on the inner wall of the first cavity (11); S4: dredging treatment, during the gas flow process, the short rod (44) is fixed to dredge the filter hole (21).

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