An underground construction air purification device

Abstract

The application belongs to the technical field of underground construction air purification, and particularly relates to an underground construction air purification device, which comprises a box body, a one-way air inlet pipe connected to the bottom of the box body, a gas collecting disc connected to the one-way air inlet pipe, an air outlet pipe connected to the upper end of the box body, and an air drying assembly connected to the air outlet pipe. The air drying assembly comprises a pipeline, a plurality of groups of installation grooves staggered on the pipeline, an installation frame fixedly welded in the installation grooves, a heat dissipation fin welded on the lower end face of the installation frame, and a refrigeration fin fixedly installed on the heat dissipation fin, with the refrigeration face of the refrigeration fin being attached to the heat dissipation fin. Compared with the prior art, the device utilizes the principle of cold and heat exchange, and can not only remove alkaline hot steam in the air, but also dry and cool the air.

Description

Technical Field

[0001] This invention belongs to the field of underground construction air purification technology, specifically an underground construction air purification device. Background Technology

[0002] Underground engineering refers to underground civil engineering projects constructed below ground level to develop and utilize underground space resources. It includes underground houses and structures, underground railways, highway tunnels, underwater tunnels, underground utility tunnels, and pedestrian underpasses. During the construction of underground projects, drilling, blasting, and muck loading operations generate large amounts of dust particles and acidic gases (such as SO2). If air circulation is poor, it will exacerbate oxygen deficiency in machinery, leading to incomplete combustion of fuel, increased acidic gas content in exhaust gases, reduced machinery power, harm to the health of operators, and shorten the service life of the machinery.

[0003] Publication No. CN110542159A discloses an air purifier for underground engineering construction, comprising a housing, a fan fixedly installed at the lower end of the housing, the fan being connected to the housing via a one-way air inlet pipe, an air outlet pipe fixedly connected to the upper end of the housing, a thermoelectric generator fixedly installed on the side wall of the air outlet pipe, the thermoelectric generator penetrating the side wall of the air outlet pipe, an alkaline solution contained within the housing, and electrolysis chambers connected to the interior of the housing on both side walls, with an exhaust pipe fixedly connected to the upper end of the electrolysis chamber, the upper end of the exhaust pipe being higher than the liquid level of the alkaline solution. This invention can absorb and purify acidic gases in the air through an alkaline solution, ensuring the health and safety of underground workers. The thermoelectric generator electrolyzes the water generated in the reaction, preventing the alkaline solution from being diluted, thus avoiding a lower purification effect.

[0004] In the above-mentioned scheme, the acidic gas reacts chemically with the alkaline solution inside the box, generating a large amount of heat. As the temperature inside the box rises, a small amount of alkaline solution forms hot steam. As air flows towards the exhaust pipe, the alkaline hot steam carried in the air is absorbed by the absorbent cotton. Under the action of centrifugal force, the alkaline solution absorbed by the absorbent cotton is thrown into the drainage chamber, which can prevent secondary pollution to the underground construction environment. However, due to the high temperature inside the box, the alkaline solution accumulated in the absorbent cotton will still generate alkaline hot steam due to the high temperature. The alkaline hot steam is directly discharged outdoors with the air. Therefore, the absorbent cotton can only reduce the pollution of the construction environment, but cannot completely avoid environmental pollution. Therefore, the present invention provides an underground construction air purification device. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is as follows: The underground construction air purification device of the present invention includes a box, a one-way air inlet pipe connected to the bottom of the box, the one-way air inlet pipe connected to the air collection plate, an air outlet pipe connected to the upper end of the box, and an air drying component connected to the air drying component. The air drying component includes: a pipe, an air outlet pipe fixedly connected to the lower end of the pipe, several sets of mounting grooves staggered on the pipe, a mounting frame fixedly welded in the mounting groove, a heat sink welded to the lower end face of the mounting frame, and a cooling plate fixedly installed on the heat sink, the cooling surface of the cooling plate being in contact with the heat sink, and several sets of air outlet holes opened on the outer ring of the air collection plate.

[0007] Compared with existing technologies, this device utilizes the principle of heat exchange to not only remove alkaline hot vapor from the air, but also dry and cool the air.

[0008] Preferably, the air drying assembly further includes: a cleaning mechanism for cleaning condensate on the heat sink, the cleaning mechanism including: a drive tube screwed into the pipe, a number of brush handles staggeredly welded to the drive tube, and absorbent cotton blocks fixedly installed on the brush handles, the absorbent cotton blocks being slidably connected to the lower end face of the cooling plate.

[0009] The drive tube rotates the brush handle along with the absorbent cotton block. The absorbent cotton block slides along the heat sink, absorbing the alkaline solution on the heat sink during the sliding process, thus cleaning the alkaline solution off the heat sink and ensuring the heat sink's condensation effect on alkaline hot steam.

[0010] Preferably, the brush handle includes: a housing, the housing being welded to the drive tube and communicating with the inner cavity of the drive tube; a Z-shaped frame movably installed inside the housing; a slide rod fixedly connected to one end of the Z-shaped frame; a first spring sleeved on the slide rod; and a pressure head fixedly welded to one end of the slide rod; an absorbent cotton block located at the upper port of the housing; one end of the absorbent cotton block being fixedly connected to the other end of the Z-shaped frame; the other end of the absorbent cotton block being fixedly connected to the inner wall of the housing; the slide rod being movably inserted into the housing; and several sets of crescent-shaped frames being staggered inside the housing; and the pressure head being slidably connected to the crescent-shaped frames.

[0011] The drive tube rotates continuously, and the absorbent cotton block is squeezed after each absorption of alkaline solution to prevent the alkaline solution from accumulating on the absorbent cotton block, thus ensuring the effectiveness of the absorbent cotton block in cleaning the alkaline solution on the heat sink.

[0012] Preferably, a dredging mechanism is provided inside the air collection plate. The dredging mechanism is used to dredge the air outlet. The dredging mechanism includes: a support plate, which is fixedly installed inside the box; an electric push rod fixedly installed on the support plate; a movable rod screwed to the end of the electric push rod; several sets of support rods set at equal angles at the lower end of the movable rod; a pin fixedly welded to the end of the support rod; a movable plate with an oblique groove opened on the movable plate; the pin sliding to connect the oblique groove; four sets of dredging components set at equal distances on one side of the movable plate; and a guide plate for inserting the dredging components. The guide plate is fixedly installed inside the air collection plate. The movable rod is inserted into the air collection plate, and the dredging components are inserted into the air outlet.

[0013] The drain cleaner is inserted into the vent hole to push out the alkaline scale that has accumulated there, thus cleaning the vent hole. This not only removes the blockage caused by alkaline scale, but also makes it easier for staff to clean the vent hole.

[0014] Preferably, the unblocking component includes: an unblocking shaft, a movable plate screwed to one end of the unblocking shaft, a housing sleeved on the unblocking shaft, two sets of guide posts symmetrically and movably inserted into the housing, several sets of scrapers welded at equal angles to the outer ring of the unblocking shaft, a second spring sleeved on the several sets of scrapers, and two sets of convex shafts symmetrically welded to the unblocking shaft. Four sets of guide holes are equally spaced on the guide plate, the unblocking shaft and the four sets of scrapers are movably inserted into the guide holes, one end of the guide post is fixedly connected to the guide plate, and two sets of spiral grooves are opened on the housing, with the convex shafts slidably connected to the spiral grooves.

[0015] By using a unclog vent, scale can be removed from the air outlet without affecting the airflow into the alkaline solution, and the pressure on the fan can be greatly reduced, thus ensuring the fan's service life.

[0016] The beneficial effects of this invention are as follows:

[0017] 1. Air containing alkaline hot vapor enters the pipe through the outlet pipe. At this time, the cooling fins are activated. Since both the pipe and the mounting bracket are made of heat-insulating material, the cooling surface of the cooling fins will rapidly reduce the temperature on the heat sink. Therefore, the alkaline hot vapor entering the pipe will inevitably come into contact with the heat sink. The contact between hot and cold causes the alkaline hot vapor to condense on the heat sink to form an alkaline solution. Since several sets of heat sinks are staggered and distributed in stages in the pipe, the alkaline hot vapor can come into more thorough contact with the heat sink and be fully cooled, thereby completely removing the alkaline hot vapor from the air.

[0018] 2. After the rotating absorbent cotton block cleans the alkaline solution from the heat sink, it will shift away from the heat sink. As the absorbent cotton block and brush handle rotate continuously, the pressure head on the brush handle will be squeezed by the crescent-shaped bracket, causing the pressure head to push the slide rod and Z-shaped bracket together. The pressure head compresses the first spring, and at the same time, the other end of the moving Z-shaped bracket will squeeze the absorbent cotton block, squeezing out the alkaline solution. The squeezed alkaline solution flows into the drive tube along the shell and finally flows back into the box through the drive tube until the pressure head shifts away from the crescent-shaped bracket. Under the rebound force of the first spring, the absorbent cotton block returns to its original shape. Therefore, as the drive tube rotates continuously, the absorbent cotton block will be squeezed after each absorption of alkaline solution, preventing the alkaline solution from accumulating on the absorbent cotton block and ensuring the effectiveness of the absorbent cotton block in cleaning the alkaline solution from the heat sink.

[0019] 3. During the insertion of the unclogging component into the vent, the unclogging shaft, along with four sets of scrapers, will be inserted into the vent along the guide hole, causing most of the scale inside the vent to be pushed out. At the same time, air is ejected through the gap between the scrapers. The unclogging shaft, through the second spring, pushes the outer casing to slide along the guide post towards the guide plate until the guide plate blocks the outer casing from moving. At this time, the unclogging shaft will compress the second spring, and at the same time, the unclogging shaft will drive two sets of convex shafts to slide along two sets of spiral grooves. Under the guidance of the spiral grooves, the unclogging shaft and four sets of scrapers will rotate. The rotating four sets of scrapers will rub against the inner wall of the vent, thereby cleaning the scale on the inner wall of the vent. Therefore, through the design of the unclogging component, the scale in the vent is cleaned without affecting the air being sprayed into the alkaline solution, and the pressure on the blower is greatly reduced, thus ensuring the service life of the blower. Attached Figure Description

[0020] The invention will now be further described with reference to the accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the structure of the present invention.

[0022] Figure 2 This is a cross-sectional view of the present invention.

[0023] Figure 3 This is a partial assembly diagram of the air drying component of the present invention.

[0024] Figure 4 This is a cross-sectional schematic diagram of the air drying component of the present invention.

[0025] Figure 5 This is a cross-sectional view of the drive tube, crescent frame, brush handle, and absorbent cotton block assembly of the present invention.

[0026] Figure 6 for Figure 5 Enlarged view of point A in the middle.

[0027] Figure 7 This is a cross-sectional schematic diagram of the combination of the air collecting plate and the unblocking mechanism of the present invention.

[0028] Figure 8 This is a schematic diagram of the combination of the movable plate, the dredging component, and the guide plate of the present invention.

[0029] Figure 9 This is a schematic diagram of the assembly of the unblocking shaft, outer shell, scraper, and convex shaft of the present invention.

[0030] In the diagram: 1. Housing; 2. One-way air inlet pipe; 3. Air collection plate; 31. Air outlet; 4. Air outlet pipe; 5. Air drying assembly; 6. Unblocking mechanism; 7. Electrolysis tube; 8. Electrolysis rod; 9. Thermoelectric generator; 501. Pipe; 5011. Crescent-shaped bracket; 502. Mounting slot; 503. Mounting bracket; 504. Heat sink; 505. Cooling element; 506. Cleaning mechanism; 5061. Drive tube; 5062. Brush handle; 5063. Absorbent cotton block; 621. Housing; 622. Z Frame; 623, slide bar; 624, first spring; 625, pressure head; 601, support plate; 602, electric push rod; 603, movable rod; 604, support rod; 605, pin; 606, movable plate; 6061, inclined slide groove; 607, unblocking component; 608, guide plate; 6081, guide hole; 6071, unblocking shaft; 6072, outer shell; 721, spiral slide groove; 6073, guide post; 6074, second spring; 6075, scraper; 6076, convex shaft. Detailed Implementation

[0031] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0032] Example 1

[0033] like Figures 1 to 3 As shown in the embodiment of the present invention, an underground construction air purification device includes a housing 1, a one-way air inlet pipe 2 connected to the bottom of the housing 1, an air collection plate 3 connected to the one-way air inlet pipe 2, an air outlet pipe 4 connected to the upper end of the housing 1, and an air drying component 5 connected to the air outlet pipe 4. The air drying component 5 includes: a pipe 501, the lower end of the pipe 501 is fixedly connected to the air outlet pipe 4, several sets of mounting grooves 502 staggered on the pipe 501, a mounting bracket 503 fixedly welded in the mounting groove 502, a heat sink 504 welded to the lower end surface of the mounting bracket 503, and a cooling plate 505 fixedly installed on the heat sink 504, the cooling surface of the cooling plate 505 being in contact with the heat sink 504, and several sets of air outlet holes 31 opened on the outer ring of the air collection plate 3.

[0034] Specifically, the chamber 1 contains an alkaline solution. Two sets of electrolysis tubes 7 are symmetrically arranged on both sides of the chamber 1. One set of electrolysis tubes 7 is connected to a hydrogen storage device. Electrolysis rods 8 are installed at the bottom of the electrolysis tubes 7. The two sets of electrolysis rods 8 are positive and negative electrodes. A thermoelectric generator 9 is installed in the gas outlet pipe 4. The thermoelectric generator 9 is electrically connected to the electrolysis rods 8. A large temperature difference is generated at both ends of the thermoelectric generator 9, which converts the heat energy generated by the reaction into electrical energy. This electrical energy is then used to electrolyze water through the positive and negative electrodes of the electrolysis rods 8 to produce hydrogen and oxygen. After the water is electrolyzed... A decrease in the amount of solvent increases the concentration of NaOH in the alkaline solution, ensuring its air purification effect. The one-way air inlet pipe 2 is connected to the fan. The aforementioned mechanisms utilize the relevant structures from the air purifier for underground construction (publication number CN110542159A). When air purification of the underground construction environment is required, the one-way air inlet pipe 2 draws surrounding air into the air collection plate 3 via the fan. The air is then sprayed into the alkaline solution through several sets of air outlets 31. The alkaline solution reacts with the acidic gases in the air, thereby removing them and purifying the air. After purification, the air contains alkaline hot vapor. This air containing alkaline hot vapor enters the pipe 501 through the outlet pipe 4. At this time, the cooling plate 505 is activated. Both the pipe 501 and the mounting bracket 503 are made of heat-insulating material. The cooling surface of the cooling plate 505 will rapidly reduce the temperature on the heat sink 504. Therefore, the alkaline hot vapor entering the pipe 501 will inevitably come into contact with the heat sink 504. The contact between hot and cold causes the alkaline hot vapor to condense on the heat sink 504, forming an alkaline solution. Since several sets of heat sinks 504 are staggered and distributed in stages within the pipe 501, the alkaline hot vapor can come into more thorough contact with the heat sink 504 and be fully cooled, thereby completely removing the alkaline hot vapor from the air. Compared with the prior art, this device utilizes the principle of heat exchange to not only remove alkaline hot vapor from the air but also dry and cool the air.

[0035] like Figures 4 to 6 As shown, the air drying assembly 5 also includes a cleaning mechanism 506, which is used to clean the condensate on the heat sink 504. The cleaning mechanism 506 includes a drive tube 5061, which is screwed into the pipe 501. Several sets of brush handles 5062 are staggered and welded to the drive tube 5061. A water-absorbing cotton block 5063 is fixedly installed on the brush handle 5062. The water-absorbing cotton block 5063 is slidably connected to the lower end face of the cooling chip 505.

[0036] Specifically, as the alkaline solution condenses onto the heat sink 504 from the alkaline hot steam, the heat sink 504 will become covered with alkaline solution. If the alkaline solution is not cleaned in time, it will affect the heat sink 504's effectiveness in condensing alkaline hot steam. Therefore, when air is introduced into the pipe 501, the drive tube 5061 is driven to rotate by the motor. The drive tube 5061 drives the brush handle 5062 and the absorbent cotton block 5063 to rotate together. The rotating absorbent cotton block 5063 will pass over the heat sink 504, causing the absorbent cotton block 5063 to slide along the heat sink 504. During the sliding process, the absorbent cotton block 5063 absorbs the alkaline solution on the heat sink 504, thereby cleaning the alkaline solution off the heat sink 504 and ensuring the heat sink 504's effectiveness in condensing alkaline hot steam.

[0037] like Figure 5 and Figure 6 As shown, the brush handle 5062 includes: a housing 621, which is welded to the drive tube 5061 and communicates with the inner cavity of the drive tube 5061; a Z-shaped frame 622 movably installed inside the housing 621; a slide rod 623 fixedly connected to one end of the Z-shaped frame 622; a first spring 624 sleeved on the slide rod 623; and a pressure head 625 fixedly welded to one end of the slide rod 623. An absorbent cotton block 5063 is located at the upper end of the housing 621, with one end of the absorbent cotton block 5063 fixedly connected to the other end of the Z-shaped frame 622 and the other end of the absorbent cotton block 5063 fixedly connected to the inner wall of the housing 621. The slide rod 623 is movably inserted into the housing 621. Several sets of crescent-shaped frames 5011 are staggered inside the housing 621, and the pressure head 625 is slidably connected to the crescent-shaped frames 5011.

[0038] Specifically, as the absorbent cotton block 5063 continuously absorbs the alkaline solution, it will become saturated. If the alkaline solution on the absorbent cotton block 5063 is not squeezed off, it will affect the effectiveness of the absorbent cotton block 5063 in cleaning the alkaline solution from the heat sink 504. Therefore, after cleaning the alkaline solution from the heat sink 504, the rotating absorbent cotton block 5063 will be offset from the heat sink 504. As the absorbent cotton block 5063 and the brush handle 5062 continue to rotate, the pressure head 625 on the brush handle 5062 will be squeezed by the crescent frame 5011, causing the pressure head 625 to push the slide rod 623 and the Z-shaped frame 622 to move together, and the pressure head 625 compresses the first spring. 624. Simultaneously, the other end of the moving Z-shaped frame 622 will squeeze the absorbent cotton block 5063, causing the alkaline solution on the absorbent cotton block 5063 to be squeezed out. The squeezed alkaline solution flows into the drive tube 5061 along the shell 621, and finally flows back into the housing 1 through the drive tube 5061 until the pressure head 625 is offset from the crescent frame 5011. Under the rebound force of the first spring 624, the absorbent cotton block 5063 returns to its original shape. Therefore, as the drive tube 5061 rotates continuously, the absorbent cotton block 5063 will be squeezed after each time it absorbs the alkaline solution, preventing the alkaline solution from accumulating on the absorbent cotton block 5063 and ensuring the effectiveness of the absorbent cotton block 5063 in cleaning the alkaline solution on the heat sink 504.

[0039] like Figure 7 As shown, a dredging mechanism 6 is provided inside the air collection plate 3. The dredging mechanism 6 is used to dredge the air outlet 31. The dredging mechanism 6 includes: a support plate 601, which is fixedly installed inside the housing 1; an electric push rod 602 fixedly installed on the support plate 601; a movable rod 603 screwed to the end of the electric push rod 602; several sets of support rods 604 arranged at equal angles at the lower end of the movable rod 603; a pin 605 fixedly welded to the end of the support rod 604; a movable plate 606, on which an inclined sliding groove 6061 is opened, and the pin 605 slides to connect to the inclined sliding groove 6061; four sets of dredging components 607 arranged at equal distances on one side of the movable plate 606; and a guide plate 608 inserted into the dredging component 607. The guide plate 608 is fixedly installed inside the air collection plate 3. The movable rod 603 is inserted into the air collection plate 3, and the dredging component 607 is inserted into the air outlet 31.

[0040] Specifically, because the air collecting plate 3 is located in an alkaline solution, alkaline scale easily adheres to the air outlet 31. Over time, more and more alkaline scale accumulates in the air outlet 31, which not only affects the air ejected from the air outlet 31, but also makes cleaning more troublesome. Therefore, when cleaning the air outlet 31, the electric push rod 602 is activated. The electric push rod 602 pushes the movable rod 603, the support rod 604, and the pin 605 downward together. At the same time, the pin 605 will move along the inclined sliding groove 6. 061 slides, and pin 605 presses against the groove wall of inclined slide 6061, causing movable plate 606 to move towards air outlet 31. Movable plate 606 pushes unclogging component 607 along guide plate 608 into air outlet 31. Unclogging component 607 pushes out alkaline scale accumulated in air outlet 31, thereby cleaning air outlet 31. This not only removes the blockage of air outlet 31 by alkaline scale, but also facilitates cleaning of air outlet 31 by staff.

[0041] Example 2

[0042] like Figure 8 and Figure 9 As shown in the comparative embodiment one, another embodiment of the present invention is as follows: the unblocking component 607 includes: an unblocking shaft 6071, a movable plate 606 screwed to one end of the unblocking shaft 6071, a housing 6072 sleeved on the unblocking shaft 6071, two sets of guide posts 6073 symmetrically and movably inserted into the housing 6072, several sets of scrapers 6075 welded at equal angles to the outer ring of the unblocking shaft 6071, a second spring 6074 sleeved on the several sets of scrapers 6075, and two sets of convex shafts 6076 symmetrically welded to the unblocking shaft 6071. Four sets of guide holes 6081 are equally spaced on the guide plate 608. The unblocking shaft 6071 and the four sets of scrapers 6075 are movably inserted into the guide holes 6081. One end of the guide post 6073 is fixedly connected to the guide plate 608. Two sets of spiral grooves 721 are opened on the housing 6072. The convex shaft 6076 is slidably connected to the spiral grooves 721.

[0043] Specifically, when the end of the aforementioned unclogging component 607 is inserted into the air outlet 31, to remove the scale on the inner wall of the air outlet 31, the outer ring of the end of the unclogging component 607 must rub against the inner wall of the air outlet 31. This results in the air outlet 31 being completely blocked by the end of the unclogging component 607 when unclogging it, preventing air from being ejected and affecting the air purification efficiency. Secondly, because the fan is in operation, the air pressure in the air collection plate 3 increases, and the air pressure reacts on the fan, damaging it and affecting its service life. Therefore, during the insertion of the unclogging component 607 into the air outlet 31, the unclogging shaft 6071, along with the four sets of scrapers 6075, will be inserted into the air outlet 31 along the guide hole 6081, causing most of the scale in the air outlet 31 to be pushed out, while air passes between the scrapers 6075. The air is sprayed out through the gap. The unblocking shaft 6071 pushes the outer shell 6072 along the guide post 6073 towards the guide plate 608 through the second spring 6074 until the guide plate 608 blocks the outer shell 6072 and prevents it from moving. At this time, the unblocking shaft 6071 will compress the second spring 6074. At the same time, the unblocking shaft 6071 drives the two sets of convex shafts 6076 to slide along the two sets of spiral slide grooves 721. Under the guidance of the spiral slide grooves 721, the unblocking shaft 6071 and the four sets of scrapers 6075 rotate. The rotating four sets of scrapers 6075 will rub against the inner wall of the air outlet 31, thereby cleaning the scale on the inner wall of the air outlet 31. Therefore, through the setting of the unblocking component 607, the scale in the air outlet 31 is cleaned without affecting the air being sprayed into the alkaline solution, and the pressure on the fan is greatly reduced, thereby ensuring the service life of the fan.

[0044] Working principle: The one-way air intake pipe 2 draws surrounding air into the air collection plate 3 via a fan. The air then passes through several sets of air outlets 31 and is sprayed into an alkaline solution. The alkaline solution reacts with the acidic gases in the air, removing them and purifying the air. The purified air contains alkaline hot vapor, which enters the pipe 501 through the air outlet pipe 4. At this time, the cooling plate 505 is activated. Both the pipe 501 and the mounting bracket 503 are made of heat-insulating material. The cooling surface of the cooling plate 505 rapidly lowers the temperature of the heat sink 504. Therefore, the alkaline hot vapor entering the pipe 501 will inevitably come into contact with the heat sink 504. This hot-cold contact causes the alkaline hot vapor to condense on the heat sink 504, forming an alkaline solution. The alkaline hot steam in the air is completely removed. The drive tube 5061 is rotated by a motor, which in turn rotates the brush handle 5062 along with the absorbent cotton block 5063. The rotating absorbent cotton block 5063 passes over the heat sink 504, sliding against it. During this sliding process, the absorbent cotton block 5063 absorbs the alkaline solution from the heat sink 504, thus cleaning it. After cleaning the alkaline solution from the heat sink 504, the rotating absorbent cotton block 5063 will move away from the heat sink 504. As the absorbent cotton block 5063 and brush handle 5062 continue to rotate, the pressure head 625 on the brush handle 5062 will be subjected to pressure from the crescent-shaped bracket 50. The pressure of 11 causes the pressure head 625 to push the slide rod 623 and the Z-shaped frame 622 to move together. The pressure head 625 compresses the first spring 624. At the same time, the other end of the moving Z-shaped frame 622 will squeeze the absorbent cotton block 5063, causing the alkaline solution on the absorbent cotton block 5063 to be squeezed out. The squeezed alkaline solution flows into the drive tube 5061 along the shell 621 and finally flows back into the box 1 through the drive tube 5061. When cleaning the vent 31, the electric push rod 602 is activated. The electric push rod 602 pushes the movable rod 603, the support rod 604, and the pin 605 to move downward together. At the same time, the pin 605 will slide along the inclined slide groove 6061 and squeeze the groove wall of the inclined slide groove 6061, causing the movable plate 606 to move downward. Moving towards the vent 31, the movable plate 606 pushes the unclogging shaft 6071, along with the four sets of scrapers 6075, to insert into the vent 31 along the guide hole 6081. This causes most of the scale inside the vent 31 to be ejected, while air is ejected through the gaps between the scrapers 6075. The unclogging shaft 6071, via the second spring 6074, pushes the outer casing 6072 to slide along the guide post 6073 towards the guide plate 608 until the guide plate 608 blocks the outer casing 6072 from moving. At this point, the unclogging shaft 6071 compresses the second spring 6074, and simultaneously drives the two sets of convex shafts 6076 to slide along the two sets of spiral grooves 721. Guided by the spiral grooves 721, the unclogging shaft 6071 and the four sets of scrapers 6075 rotate.The four rotating scrapers 6075 will rub against the inner wall of the air outlet 31, thereby cleaning away the scale on the inner wall of the air outlet 31.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An underground construction air purification device, comprising a housing (1), wherein a one-way air inlet pipe (2) is connected to the bottom of the housing (1), the one-way air inlet pipe (2) is connected to an air collection plate (3), and an air outlet pipe (4) is connected to the upper end of the housing (1), characterized in that: The air outlet pipe (4) is connected to the air drying assembly (5); The air drying assembly (5) includes: Pipe (501), the lower end of which is fixedly connected to the air outlet pipe (4); Several sets of mounting slots (502) are staggered on the pipe (501); A mounting bracket (503) is fixedly welded into the mounting groove (502); Heat sink (504) welded to the lower end face of the mounting bracket (503); as well as, A cooling plate (505) is fixedly installed on the heat sink (504), the cooling surface of the cooling plate (505) is in contact with the heat sink (504), and several sets of air outlet holes (31) are opened on the outer ring of the air collection plate (3). The air drying assembly (5) also includes: A cleaning mechanism (506) is used to clean the condensate on the heat sink (504); The cleaning mechanism (506) includes: A drive tube (5061) is screwed into the pipe (501); Several sets of brush handles (5062) are staggered and welded onto the drive tube (5061); as well as, A water-absorbing cotton block (5063) is fixedly installed on the brush handle (5062), and the water-absorbing cotton block (5063) is slidably connected to the lower end face of the cooling chip (505); The brush handle (5062) includes: A housing (621) is welded to the drive tube (5061) and the housing (621) communicates with the inner cavity of the drive tube (5061); A Z-shaped frame (622) is movably installed inside the housing (621); A slide rod (623) is fixedly connected to one end of the Z-shaped frame (622); A first spring (624) is sleeved on the slide rod (623); as well as, A pressure head (625) is fixedly welded to one end of the slide bar (623).

2. The underground construction air purification device according to claim 1, characterized in that: The absorbent cotton block (5063) is located at the upper port of the housing (621). One end of the absorbent cotton block (5063) is fixedly connected to the other end of the Z-shaped frame (622), and the other end of the absorbent cotton block (5063) is fixedly connected to the inner wall of the housing (621).

3. The underground construction air purification device according to claim 2, characterized in that: The slide bar (623) is movably inserted into the housing (621), and several sets of crescent-shaped frames (5011) are staggered inside the housing (621). The pressure head (625) is slidably connected to the crescent-shaped frames (5011).

4. The underground construction air purification device according to claim 3, characterized in that: The gas collecting plate (3) is provided with a clearing mechanism (6), which is used to clear the air outlet (31). The unblocking mechanism (6) includes: Support plate (601), the support plate (601) is fixedly installed inside the box (1); An electric push rod (602) is fixedly installed on the support plate (601); The movable rod (603) is screwed to the end of the electric push rod (602); Several sets of support rods (604) are set at equal angles at the lower end of the movable rod (603); A pin (605) is fixedly welded to the end of the support rod (604); A movable plate (606) has an inclined groove (6061) on it, and a pin (605) slides to connect the inclined groove (6061). Four sets of unblocking components (607) are equidistantly arranged on one side of the movable plate (606). as well as, The guide plate (608) is inserted into the unblocking component (607).

5. The underground construction air purification device according to claim 4, characterized in that: The guide plate (608) is fixedly installed inside the air collecting plate (3), the movable rod (603) is inserted into the air collecting plate (3), and the unblocking component (607) is inserted into the air outlet (31).

6. The underground construction air purification device according to claim 5, characterized in that: The unblocking component (607) includes: A dredging shaft (6071) is screwed to one end of the movable plate (606). The outer casing (6072) is fitted onto the unclogging shaft (6071); Two sets of guide posts (6073) are symmetrically and movably inserted into the outer casing (6072); Several sets of scrapers (6075) are welded at equal angles to the outer ring of the unclogging shaft (6071); A second spring (6074) is sleeved on several sets of scrapers (6075). as well as, Two sets of convex shafts (6076) are symmetrically welded onto the unblocking shaft (6071).

7. The underground construction air purification device according to claim 6, characterized in that: Four sets of guide holes (6081) are equally spaced on the guide plate (608). The unblocking shaft (6071) and four sets of scrapers (6075) are movably inserted into the guide holes (6081). One end of the guide post (6073) is fixedly connected to the guide plate (608).

8. An underground construction air purification device according to claim 7, characterized in that: Two sets of spiral grooves (721) are provided on the outer shell (6072), and the convex shaft (6076) is slidably connected to the spiral grooves (721).

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