Air purification mechanism for mine laneway construction
Through a multi-stage purification structure and frame-type installation design, the problems of poor dust and harmful gas purification effect and insufficient equipment stability during mine roadway construction have been solved, achieving efficient and safe air purification effect and simple maintenance process.
Patent Information
- Application Number
- CN202610005851.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-05
- Publication Date
- 2026-02-06
AI Technical Summary
In existing mine roadway construction air purification equipment, traditional activated carbon adsorption modules have a small contact area and poor adsorption effect. A single filter structure is difficult to efficiently treat dust and multiple harmful gases at the same time. In addition, the equipment connection strength is insufficient, making it easy to loosen and be damaged. The maintenance process is cumbersome, which affects the construction progress and poses safety hazards.
It adopts a multi-stage purification structure, including an S-shaped cavity for the activated carbon mounting bracket, a spray assembly, and a spiral air supply block. Combined with frame-type installation and a detachable modular design, it enhances the airflow contact area and purification effect, improves equipment stability and connection strength, and simplifies the maintenance process.
It achieves efficient purification of dust and various harmful gases, improves the equipment's resistance to loosening in vibration environments, simplifies maintenance procedures, and ensures construction progress and safety.
Smart Images
Figure CN121473897A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of mine construction safety technology, specifically to an air purification mechanism for mine roadway construction. Background Technology
[0002] During mine tunnel construction, blasting operations and mechanical tunneling generate large amounts of dust. Simultaneously, coal desorption releases toxic and harmful gases such as methane, carbon monoxide, and hydrogen sulfide. These pollutants not only reduce visibility in the tunnels, affecting construction efficiency, but also seriously endanger the respiratory health of construction workers. When the methane concentration reaches the explosive limit, it can trigger an explosion upon contact with a source of ignition, causing significant casualties and property damage. Therefore, air purification equipment has become an essential safety guarantee facility in mine tunnel construction. Currently, existing mine tunnel air purification equipment is mainly divided into two categories: one is the traditional ventilation dilution system, which dilutes the pollutant concentration by introducing fresh air and then exhausts it. However, it cannot directly purify pollutants, easily causing secondary pollution to the surrounding environment, and its effectiveness in treating harmful gases such as methane is limited. The other category is dedicated purification equipment, which often uses a structure combining filter modules, adsorption modules, and ventilation devices to achieve purification through physical interception and adsorption. However, existing dedicated purification equipment has some shortcomings in practical applications, such as: Traditional activated carbon adsorption modules have poor adsorption effects on harmful gases due to the small contact area between the airflow and the adsorption material. A single filtration structure is difficult to efficiently treat dust and multiple harmful gases at the same time. In addition, the filter module and adsorption module are mostly fixed installations, and the process of replacing or cleaning saturated materials is cumbersome, which affects the construction progress. Furthermore, the narrow space in mine roadways and the continuous vibration and bumps during construction make the overall connection strength of existing equipment insufficient, which can easily lead to loosening and damage of components, and even pose a safety hazard of falling and injuring people.
[0003] To address the aforementioned issues, there is an urgent need for innovative designs based on existing air purification equipment used in mine roadway construction. Summary of the Invention
[0004] The purpose of this invention is to provide an air purification mechanism for mine roadway construction, in order to solve the problems mentioned in the background art. Traditional activated carbon adsorption modules have poor adsorption effects on harmful gases due to the small contact area between airflow and adsorption material. A single filter structure is difficult to efficiently treat dust and multiple harmful gases simultaneously. In addition, the filter module and adsorption module are mostly fixed installations, and the process of replacing or cleaning saturated materials is cumbersome, affecting the construction progress. Furthermore, the space in mine roadways is narrow, and there is continuous vibration and bumps during construction. The overall connection strength of existing equipment is insufficient, which can easily lead to loosening and damage of parts, and even safety hazards such as falling and injuring people.
[0005] To achieve the above objectives, the present invention provides the following technical solution: an air purification mechanism for mine roadway construction, comprising a purification column body as the main shell structure, wherein a rectangular hole is provided on the side wall of the purification column body, and a connecting frame extends from the outer wall of the rectangular hole, the connecting frame is inserted into the side wall of the crossbeam body, and both ends of the crossbeam body are respectively spliced with the purification column body, and the purification column body and the crossbeam body together form a frame-type installation structure; The purification column has an air inlet cavity on one side of its bottom end, and a fan is installed in the air inlet cavity. The air inlet cavity is provided with an outwardly extending exhaust pipe, and one end of the exhaust pipe is connected to the guide pipe. Furthermore, ventilation pipes for supplying air to mine roadways are equidistantly opened in the guide pipe. The bottom of the purification column body is fitted with an activated carbon mounting frame, and the top surface of the activated carbon mounting frame is set as a filter plate. The chamber of the purification column body is arranged from top to bottom as an airflow limiting plate, a lifting guide frame, a limiting cavity tube, a spiral air supply block and a spray assembly, and the spray assembly is set directly above the activated carbon mounting frame. The main body of the crossbeam is internally fitted with a preliminary filter tube, and an airflow guide frame is installed on one side of the preliminary filter tube. The surface of the main body of the crossbeam is provided with equally spaced circular holes, and an air inlet is installed in the circular hole. The air inlet is positioned facing the filter plate side of the preliminary filter tube. A filter screen is installed in the cavity of the preliminary filter tube, and both ends of the preliminary filter tube are connected to the respective connecting frames.
[0006] By adopting the above technical solutions, the portal frame structure improves the overall support stability of the equipment; the multi-stage purification structure enables the synergistic treatment of dust and harmful gases, improving the comprehensiveness of purification.
[0007] Preferably, the bottom end of the purification column body is fixedly installed with a support base by bolts, and the purification column body as a whole has an L-shaped structure.
[0008] By adopting the above technical solution, the bolt-fixed support base enhances the installation stability of the purification column, and the L-shaped structure adapts to the narrow space layout of the mine, improving the stability of equipment placement.
[0009] Preferably, a top protective cover is snapped onto the top of the purification column body, and an electric drive push rod is provided at the bottom of the top protective cover.
[0010] Using the above technical solution, the top protective cover protects the internal components of the purification column, preventing dust from entering.
[0011] Preferably, the activated carbon mounting rack has an S-shaped cavity, and an activated carbon pack is placed inside the cavity. One end of the cavity of the activated carbon mounting rack is connected to the air inlet cavity.
[0012] By adopting the above technical solution, the S-shaped cavity prolongs the residence time of the airflow in the activated carbon mounting rack, increases the contact area with the activated carbon pack, and improves the adsorption effect of harmful gases.
[0013] Preferably, the spray assembly plate is embedded in the inner wall of the purification column body, and the nozzles of the spray assembly are symmetrically arranged.
[0014] By adopting the above technical solution, the embedded spray assembly improves structural stability, and the symmetrically arranged nozzles ensure uniform water mist distribution, thereby enhancing the dust removal effect by entraining fine dust.
[0015] Preferably, the spiral air supply block has a spiral duct inside, and the diameter of the air outlet at one end of the duct connected to the limiting cavity is larger than the diameter of the air outlet at the other end, and the air outlet at the other end is connected to the chamber of the spray assembly. By adopting the above technical solution, the spiral duct and variable diameter design accelerate the airflow velocity, improve the contact efficiency between the airflow and water mist in subsequent spray dust removal, and ensure the dust removal effect.
[0016] Preferably, the lifting guide frame has a T-shaped cross-section and is slidably connected within the limiting cavity.
[0017] By adopting the above technical solution, the sliding cooperation between the T-shaped lifting guide frame and the limiting cavity enables precise adjustment of the air intake gap, while improving the component's resistance to loosening under vibration.
[0018] Preferably, an airflow limiting plate is fixedly installed at the output end of the electric drive push rod, and the airflow limiting plate and the lifting guide frame together form an I-shaped structure, and the overall height of the lifting guide frame is greater than the overall height of the limiting cavity tube.
[0019] By adopting the above technical solution, the I-shaped structure enhances the connection strength between the airflow limiting plate and the lifting guide frame, improves the stability of airflow regulation, and the height design of the lifting guide frame ensures sufficient adjustment stroke to meet different air intake requirements.
[0020] Preferably, the top of the airflow limiting plate is equipped with a corrugated telescopic tube and an auxiliary spring, and the auxiliary spring surrounds the electric drive push rod.
[0021] By adopting the above technical solution, the corrugated telescopic tube protects the electric drive push rod from dust corrosion, extending its service life, and the auxiliary spring assists the airflow limit plate in resetting, improving the response efficiency and stability of airflow regulation.
[0022] Preferably, the corrugated telescopic tube and the auxiliary spring are nested in a concentric circle, and the corrugated telescopic tube is disposed between the inner wall of the purification column body and the airflow limiting plate.
[0023] By adopting the above technical solution, the concentric nested arrangement improves the structural compactness and adapts to the limited internal space of the purification column. The installation position of the corrugated expansion tube further enhances the protective effect and prevents airflow intrusion from affecting the operation of the components.
[0024] Compared with the prior art, the beneficial effects of the present invention are: the air purification mechanism for mine roadway construction: 1. The S-shaped cavity structure of the activated carbon mounting frame allows the airflow to flow in a meandering manner within the cavity, effectively increasing the contact area between the airflow and the activated carbon pack. At the same time, the device is equipped with a multi-stage purification structure in which the filter screen of the preliminary filter tube intercepts large dust particles, the symmetrical nozzles of the spray assembly carry away fine dust particles, and the S-cavity of the activated carbon mounting frame adsorbs and treats harmful gases. This structure can simultaneously and efficiently treat dust and various harmful gases in mine roadways, providing a more comprehensive purification coverage. 2. The system adopts a snap-fit activated carbon mounting frame and a snap-fit primary filter tube, which are detachable structures. Compared with traditional fixed-installation filter or adsorption modules, it can quickly remove saturated activated carbon packs, replace filter screens, or clean dust from the surface of filter plates without disassembling complex connectors. This simplifies the maintenance process and avoids affecting the construction progress of mine roadways due to excessive time spent on module replacement or cleaning. 3. The overall connection strength of the equipment is improved by assembling the main body of the purification column and the main body of the crossbeam into a gate-like frame structure, and by using a bolt-fixed support base. At the same time, the sliding fit between the lifting guide frame and the limiting cavity, and the protection of the electric drive push rod by the corrugated telescopic tube, enhance the anti-loosening ability of the components in the environment of vibration and bumps. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the overall external three-dimensional structure of the present invention; Figure 2 This is a three-dimensional structural diagram of the activated carbon mounting bracket and guide tube of the present invention; Figure 3 This is a three-dimensional structural diagram of the main body of the purification column and the main body of the crossbeam of the present invention. Figure 4 This is a schematic diagram of the overall internal cross-sectional three-dimensional structure of the present invention; Figure 5 This is a schematic diagram of the overall internal side cross-section of the present invention. Figure 6 This is a three-dimensional structural diagram showing the disassembled main body of the purification column, the activated carbon mounting frame, and the electric drive push rod of the present invention; Figure 7 This is a three-dimensional side-section diagram of the internal structure of the purification column body and the spiral air supply block of the present invention. Figure 8 This is a schematic diagram of the internal side section of the main body of the purification column of the present invention. Figure 9 This is a three-dimensional structural diagram of the spiral air supply block, limiting cavity tube, and lifting guide frame of the present invention. Figure 10 This is a three-dimensional structural diagram showing the disassembled crossbeam body, preliminary filter tube, and air inlet nozzle of the present invention.
[0026] In the diagram: 1. Main body of the purification column; 2. Connecting frame; 3. Air inlet cavity; 4. Fan; 5. Exhaust duct; 6. Activated carbon mounting frame; 7. Filter plate; 8. Spray assembly; 9. Spiral air supply block; 10. Limiting cavity tube; 11. Lifting guide frame; 12. Electric drive push rod; 13. Top protective cover; 14. Airflow limiting plate; 15. Corrugated telescopic tube; 16. Auxiliary spring; 17. Main body of the crossbeam; 18. Preliminary filter tube; 19. Airflow guide frame; 20. Air inlet nozzle; 21. Guide tube; 22. Exhaust duct; 23. Support base. Detailed Implementation
[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0028] Please see Figures 1-10 The present invention provides a technical solution: an air purification mechanism for mine roadway construction, comprising a purification column body 1, a connecting frame 2, an air inlet cavity 3, a fan 4, an exhaust pipe 5, an activated carbon mounting frame 6, a filter plate 7, a spray assembly 8, a spiral air supply block 9, a limiting cavity pipe 10, a lifting guide frame 11, an electric drive push rod 12, a top protective cover 13, an airflow limiting plate 14, a corrugated telescopic pipe 15, an auxiliary spring 16, a crossbeam body 17, a preliminary filter pipe 18, an airflow guide frame 19, an air inlet nozzle 20, a guide pipe 21, a ventilation pipe 22, and a support base 23; Among them, the purification column body 1 serves as the main shell structure. The side wall of the purification column body 1 has a rectangular hole, and the outer wall of the rectangular hole extends into a connecting frame 2. The connecting frame 2 is inserted into the side wall of the crossbeam body 17, and the two ends of the crossbeam body 17 are respectively spliced with the purification column body 1. The purification column body 1 and the crossbeam body 17 together form a frame installation structure. The purification column body 1 has an air inlet cavity 3 on one side of its bottom end, and a fan 4 is installed inside the air inlet cavity 3. The bottom end of the purification column body 1 is fixed with a support base 23 by bolts. The purification column body 1 has an overall L-shaped structure. The top of the purification column body 1 is fitted with a top protective cover 13, and the bottom end of the top protective cover 13 is provided with an electric drive push rod 12. The air inlet cavity 3 is provided with an outwardly extending exhaust pipe 5, and the exhaust pipe 5 is connected to one end of the guide pipe 21. The guide pipe 21 is provided with ventilating pipes 22 for supplying air to the mine roadway at equal intervals. Referring to the attached diagrams in the instruction manual Figures 1-10 As shown, the bottom ends of the two sets of purification column bodies 1 are fixed with bolts to install the support base 23, so that the purification column body 1 remains vertical. The two ends of the crossbeam body 17 are spliced with the connecting frame 2 on the side wall of the purification column body 1, so that the purification column body 1 and the crossbeam body 17 form a frame installation structure. A preliminary filter tube 18 is installed inside the main body of the crossbeam 17, and an airflow guide frame 19 is fixed on one side of the preliminary filter tube 18. At the same time, an air inlet 20 is installed in the round hole on the surface of the main body of the crossbeam 17, wherein the air inlet 20 faces the filter screen plate of the preliminary filter tube 18. The activated carbon mounting bracket 6 is inserted and snapped into the bottom of the main body 1 of the purification column, and the filter plate 7 is placed on the top surface of the activated carbon mounting bracket 6. In the purification column body 1, the following components are assembled from top to bottom: the limiting cavity tube 10 is fixed in the middle of the cavity, the lifting guide frame 11 is slidably embedded in the limiting cavity tube 10, the top protective cover 13 is snapped on the top of the purification column body 1, and the electric drive push rod 12 is fixed to the bottom of the top protective cover 13, so that the output end of the electric drive push rod 12 is connected to the airflow limiting plate 14, and the airflow limiting plate 14 and the lifting guide frame 11 form an I-shaped structure. A corrugated telescopic tube 15 is installed at the top of the airflow limiting plate 14, located between the inner wall of the purification column body 1 and the airflow limiting plate 14, and an auxiliary spring 16 is installed around the electric drive push rod 12. A spiral air supply block 9 is fixed in the cavity of the main body 1 of the purification column, and an embedded spray assembly 8 is installed directly above the activated carbon mounting bracket 6. The interface of the spray assembly 8 is connected to the water supply pipeline of the external water tank. A fan 4 is installed in the air inlet cavity 3 on one side of the bottom of the main body 1 of the purification column, and the exhaust pipe 5 is connected to the air inlet cavity 3. At the same time, the exhaust pipe 5 is connected to one end of the guide pipe 21, and the ventilation pipe 22 is opened at equal intervals on the side wall of the guide pipe 21. The bottom of the purification column body 1 is fitted with an activated carbon mounting bracket 6, and the top surface of the activated carbon mounting bracket 6 is set as a filter plate 7. The activated carbon mounting bracket 6 has an S-shaped cavity, and an activated carbon pack is filled in the cavity. One end of the cavity of the activated carbon mounting bracket 6 is connected to the air inlet cavity 3. From top to bottom, the cavity of the purification column body 1 is arranged with an airflow limiting plate 14, a lifting guide frame 11, a limiting cavity tube 10, a spiral air supply block 9, and a spray assembly 8. The spray assembly 8 is set directly above the activated carbon mounting bracket 6. The lifting guide frame 11 has a T-shaped cross-section and is slidably connected in the limiting cavity tube 10. The plate of the spray assembly 8 is embedded in the inner wall of the purification column body 1, and the nozzles of the spray assembly 8 are symmetrical. The spiral air supply block 9 is configured with a spiral air duct inside. The diameter of the air outlet at one end of the air duct connected to the limiting cavity tube 10 is larger than the diameter of the air outlet at the other end. The air outlet at the other end is connected to the chamber of the spray assembly 8. An airflow limiting plate 14 is fixedly installed at the output end of the electric drive push rod 12. The airflow limiting plate 14 and the lifting guide frame 11 together form an I-shaped structure. The overall height of the lifting guide frame 11 is greater than the overall height of the limiting cavity tube 10. A corrugated telescopic tube 15 and an auxiliary spring 16 are installed at the top of the airflow limiting plate 14. The auxiliary spring 16 surrounds the electric drive push rod 12. The corrugated telescopic tube 15 and the auxiliary spring 16 are arranged in a concentric nested arrangement. The corrugated telescopic tube 15 is arranged between the inner wall of the purification column body 1 and the airflow limiting plate 14. The main body of the crossbeam 17 is internally fitted with a preliminary filter tube 18, and an airflow guide frame 19 is installed on one side of the preliminary filter tube 18. The surface of the main body of the crossbeam 17 is provided with equally spaced circular holes, and an air inlet nozzle 20 is installed in the circular hole. The air inlet nozzle 20 is positioned facing the filter plate side of the preliminary filter tube 18. A filter screen is installed in the cavity of the preliminary filter tube 18, and the two ends of the preliminary filter tube 18 are connected to the connecting frame 2 respectively. Referring to the attached diagrams in the instruction manual Figures 1-10 As shown, the turbid air in the mine roadway enters the device through the air inlet 20 on the surface of the main beam 17, and after being guided by the airflow guide frame 19, it passes through the filter screen in the preliminary filter pipe 18 to intercept large particles of dust and impurities in the air and complete the preliminary filtration. After preliminary filtration, the air enters the chamber of the purification column body 1 through the connecting frame 2; the electric drive push rod 12 is activated, and its output end drives the airflow limiting plate 14 to rise and fall, which drives the T-shaped lifting guide frame 11 to slide in the limiting cavity tube 10. The amount of air entering is controlled by adjusting the opening and closing gap between the two. During this process, the corrugated telescopic tube 15 protects the electric drive push rod 12 from air intrusion, and the auxiliary spring 16 assists the airflow limiting plate 14 to reset. The regulated air enters the spiral air supply block 9, and its spiral air duct, which gradually narrows, accelerates the airflow. As the accelerated air flows through the area of the spray assembly 8, the spray assembly 8 sprays water mist through the external water tank supply pipe. The water mist carries fine dust particles, which settle onto the surface of the filter plate 7. The dust-removed air passes through the filter plate 7 and enters the S-shaped cavity of the activated carbon mounting bracket 6. The activated carbon packs inside the cavity adsorb harmful gases. The purified clean air is driven by the fan 4 and transported through the air inlet cavity 3 to the exhaust pipe 5. Then, it is transported back to the mine roadway through the guide pipe 21 and the vent pipe 22 on its side wall, completing the purification cycle.
[0029] Working principle: When using this air purification device for mine roadway construction, the turbid air in the mine roadway first enters the device through the air inlet 20 on the surface of the main beam 17, and after being guided by the airflow guide frame 19, it passes through the filter screen in the preliminary filter tube 18 to complete the preliminary interception and filtration of large particles of dust and impurities in the air. After preliminary filtration, the turbid air enters the chamber of the purification column body 1 through the connecting frame 2; the electric drive push rod 12 drives the airflow limiting plate 14 to rise and fall, causing the T-shaped lifting guide frame 11 to slide in the limiting cavity tube 10. By adjusting the opening and closing gap between the lifting guide frame 11 and the limiting cavity tube 10, the airflow entering the purification column body 1 is precisely controlled. At the same time, the corrugated telescopic tube 15 at the top of the airflow limiting plate 14 forms a protection for the electric drive push rod 12 to prevent air from entering the push rod structure. The auxiliary spring 16 assists the airflow limiting plate 14 to reset. Air that has undergone flow regulation enters the spiral air supply block 9. With the help of its spiral air duct structure that changes from large to small, the air velocity is accelerated. When the accelerated air flows through the area of the spray assembly 8, the spray assembly 8 supplies water mist through an externally connected water tank. The water mist comes into full contact with the high-speed airflow, carrying away fine dust particles in the air. The dust settles onto the surface of the filter plate 7 with the water mist. The air that has completed water mist dust removal passes through the filter plate 7 and enters the S-shaped cavity of the activated carbon mounting bracket 6. The activated carbon packs in the cavity adsorb harmful gases such as methane and odors in the air, achieving deep purification. The purified clean air is driven by the fan 4 and transported through the air inlet cavity 3 to the exhaust pipe 5. Then, through the guide pipe 21 connected to the exhaust pipe 5, it is transported back to the mine roadway through the vent pipe 22 on the side wall of the guide pipe 21, completing the air purification cycle.
[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. An air purification mechanism for mine roadway construction, comprising: The purification column body (1) serves as the main shell structure. The side wall of the purification column body (1) is provided with a rectangular hole, and the outer wall of the rectangular hole extends out a connecting frame (2). The connecting frame (2) is inserted into the side wall of the crossbeam body (17), and the two ends of the crossbeam body (17) are respectively spliced with the purification column body (1). The purification column body (1) and the crossbeam body (17) together form a frame installation structure. The feature is that: an air inlet cavity (3) is provided on one side of the bottom end of the purification column body (1), and a fan (4) is installed in the air inlet cavity (3). The air inlet cavity (3) is provided with an outwardly extending exhaust pipe (5), and one end of the exhaust pipe (5) is connected to the guide pipe (21). Furthermore, ventilation pipes (22) for supplying air to mine roadways are provided at equal intervals in the guide pipe (21). The bottom of the purification column body (1) is fitted with an activated carbon mounting bracket (6), and the top surface of the activated carbon mounting bracket (6) is set as a filter plate (7). The cavity of the purification column body (1) is arranged from top to bottom as an airflow limiting plate (14), a lifting guide frame (11), a limiting cavity tube (10), a spiral air supply block (9), and a spray assembly (8), and the spray assembly (8) is set directly above the activated carbon mounting bracket (6). The main body of the crossbeam (17) is internally fitted with a preliminary filter tube (18), and an airflow guide frame (19) is installed on one side of the preliminary filter tube (18). The surface of the main body of the crossbeam (17) is provided with equidistant circular holes, and an air inlet nozzle (20) is installed in the circular hole. The air inlet nozzle (20) is positioned facing the filter plate side of the preliminary filter tube (18). A filter screen is installed in the cavity of the preliminary filter tube (18), and the two ends of the preliminary filter tube (18) are connected to the connecting frame (2) respectively.
2. An air purification mechanism for mine roadway construction according to claim 1, characterized in that: The bottom end of the purification column body (1) is fixed with a support base (23) by bolts, and the purification column body (1) is an L-shaped structure.
3. An air purification mechanism for mine roadway construction according to claim 1, characterized in that: The top of the purification column body (1) is fitted with a top protective cover (13), and an electric drive push rod (12) is provided at the bottom of the top protective cover (13).
4. An air purification mechanism for mine roadway construction according to claim 1, characterized in that: The activated carbon mounting bracket (6) has an S-shaped cavity, and an activated carbon pack is placed inside the cavity. One end of the cavity of the activated carbon mounting bracket (6) is connected to the air inlet cavity (3).
5. An air purification mechanism for mine roadway construction according to claim 1, characterized in that: The spray assembly (8) is embedded in the inner wall of the purification column body (1), and the nozzles of the spray assembly (8) are symmetrically arranged.
6. An air purification mechanism for mine roadway construction according to claim 1, characterized in that: The spiral air supply block (9) has a spiral air duct inside, and the diameter of the air outlet at one end of the air duct connected to the limiting cavity tube (10) is larger than the diameter of the air outlet at the other end, and the air outlet at the other end is connected to the chamber of the spray assembly (8).
7. An air purification mechanism for mine roadway construction according to claim 1, characterized in that: The lifting guide frame (11) has a T-shaped cross-section and is slidably connected within the limiting cavity tube (10).
8. An air purification mechanism for mine roadway construction according to claim 3, characterized in that: The output end of the electric drive push rod (12) is fixedly installed with an airflow limiting plate (14), and the airflow limiting plate (14) and the lifting guide frame (11) together form an I-shaped structure, and the overall height of the lifting guide frame (11) is greater than the overall height of the limiting cavity tube (10).
9. An air purification mechanism for mine roadway construction according to claim 8, characterized in that: The top of the airflow limiting plate (14) is equipped with a corrugated telescopic tube (15) and an auxiliary spring (16), and the auxiliary spring (16) surrounds the electric drive push rod (12).
10. An air purification mechanism for mine roadway construction according to claim 9, characterized in that: The corrugated telescopic tube (15) and the auxiliary spring (16) are nested in concentric circles, and the corrugated telescopic tube (15) is set between the inner wall of the purification column body (1) and the airflow limiting plate (14).