Ventilation device for building tunnel construction

Abstract

The invention relates to the technical field of tunnel construction, and discloses a ventilation device for building tunnel construction, which comprises a ventilation pipe, a fan, a dust filtering assembly and a telescopic exhaust assembly, the dust filtering assembly and the fan are sequentially arranged at the air inlet end of the ventilation pipe, and the telescopic exhaust assembly is arranged in the ventilation pipe and communicates with the fan. The telescopic exhaust assembly comprises a telescopic air passing piece and a telescopic exhaust piece, the telescopic air passing piece is arranged in the ventilation pipe and communicates with the draught fan, sliding openings are formed in the two sides of the ventilation pipe, the telescopic air passing piece is in sliding fit with the sliding openings, and inclined groove openings symmetrically distributed along the sliding openings are formed in the side face of the ventilation pipe. Through dynamic adjustment of the telescopic air passing piece and the telescopic air exhaust piece, more air exhaust holes can be gradually opened in the deep position of the tunnel, so that the ventilation range is expanded, air introduced into the deep position of the tunnel is more uniform, the problem that ventilation of a traditional ventilation pipe is insufficient in the deep position is solved, it is ensured that constructors can obtain enough fresh air, and the construction efficiency is improved. The health and the safety are ensured.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel construction, and in particular to a ventilation device for building tunnel construction. Background Art

[0002] In cities, tunnels can pass through densely built areas, rivers, lakes and other obstacles, connect different areas, relieve ground traffic pressure and improve traffic efficiency. For example, urban subway tunnels and underground road tunnels provide citizens with a convenient way of travel, shorten commuting time and promote the smooth operation of urban traffic. During the construction of tunnels, since the internal space of the tunnel is relatively closed and the air circulation is limited, effective ventilation measures need to be taken to ensure that the workers in the tunnel can breathe enough oxygen to ensure their life safety and health. In order to achieve this goal, ventilation pipes are usually used as the main ventilation equipment. The air inlet end of the ventilation pipe is connected to a fan. The fan generates airflow through operation and guides the external air along the ventilation pipe to the depth of the tunnel. In this way, fresh air can continuously enter the tunnel and replace the polluted air, thereby maintaining the air quality in the tunnel. During tunnel construction, the exhaust vents of traditional ventilation ducts are fixed in position, resulting in limitations in ventilation effects. Specifically, the amount of air in the area near the entrance of the ventilation duct is relatively large, and as the tunnel extends deeper, the amount of air gradually decreases. Since the working surface deep in the tunnel requires more fresh air to dilute harmful gases and dust, and the exhaust vents of the ventilation ducts are fixed in position, the existing ventilation ducts cannot dynamically adjust the air distribution according to the ventilation needs in the tunnel, and it is difficult to ensure the uniform distribution of air deep in the tunnel. This makes it easy for local areas deep in the tunnel to have insufficient ventilation during the ventilation process, affecting the health of construction workers and construction safety.

[0003] In order to solve the above problems, the present application proposes a ventilation device for building tunnel construction. Summary of the invention

[0004] The present invention proposes a ventilation device for building tunnel construction, which solves the problem that the existing ventilation pipes in the related technology cannot dynamically adjust the air distribution according to the ventilation needs in the tunnel, and it is difficult to ensure the uniform distribution of air deep in the tunnel, which makes it easy for local areas deep in the tunnel to have insufficient ventilation during the ventilation process.

[0005] The present invention provides a ventilation device for building tunnel construction, comprising a ventilation pipe, a fan, a dust filter assembly and a telescopic exhaust assembly; The dust filter assembly and the fan are arranged in sequence at the air inlet end of the ventilation duct, and the telescopic exhaust assembly is arranged in the ventilation duct and communicated with the fan; The telescopic exhaust assembly includes a telescopic air passing member and a telescopic exhaust member, the telescopic air passing member is arranged in the ventilation pipe and is connected to the fan, both sides of the ventilation pipe are provided with sliding openings, the telescopic air passing member and the sliding openings are slidably matched, the side of the ventilation pipe is provided with oblique slots symmetrically distributed along the sliding openings, the telescopic exhaust member is connected to the telescopic air passing member and is matched with the oblique slots; The ventilation duct is equipped with a driving member that drives the dust filter assembly to operate and drives the telescopic air passing member to reciprocate along the sliding mouth; when the telescopic air passing member reciprocates along the sliding mouth, it gradually expands and contracts, and the telescopic exhaust member on the telescopic air passing member reciprocates along the inclined slot and gradually expands and contracts.

[0006] As a further optimization scheme of the present invention, the telescopic air flow member includes a flexible air flow hood, a docking frame, an exhaust box and a slider. Several of the flexible air flow hoods are connected to the docking frame at their connection nodes. The flexible air flow hood at one end is connected to the exhaust box, and the flexible air flow hood at the other end is connected to the fan. Several of the flexible air flow hoods and the docking frame form air flow channels connected to the exhaust box. The telescopic exhaust member is connected to one side of the exhaust box, and a slider is installed on the other side of the exhaust box. The telescopic exhaust member and the slider are respectively slidably matched with two sliding openings, and the slider is matched with the dust filter assembly through a transmission assembly.

[0007] As a further optimization scheme of the present invention, the telescopic exhaust member includes an exhaust pipe, a shaft cylinder, a flexible exhaust portion and a guide rod, the side of the exhaust box is connected with an exhaust pipe that slidably cooperates with one of the sliding openings, the end of the exhaust pipe is connected with the shaft cylinder, both ends of the shaft cylinder are connected with flexible exhaust portions, the two flexible exhaust portions are rotatably connected with guide rods, and the two guide rods are respectively slidably cooperated with the two inclined slots; The flexible exhaust part includes a flexible tube, a docking ring, an exhaust shaft and exhaust holes. Several connection nodes of the flexible tubes are connected with docking rings. The flexible tube at one end is connected with the shaft cylinder, and the flexible tube at the other end is connected with the exhaust shaft. Exhaust holes are provided on the peripheries of the exhaust shaft and the flexible tube, and the two guide rods are rotatably connected to the peripheries of the two exhaust shafts respectively.

[0008] As a further optimization scheme of the present invention, the dust filter assembly includes a flexible filter screen, the air inlet end of the ventilation pipe is provided with two symmetrically arranged openings, the flexible filter screen passes through the two openings, a roller brush member that contacts the bottom of the flexible filter screen is installed on the ventilation pipe, and the roller brush member is in transmission cooperation with the dust filter assembly, and the scraper is sleeved on the roller brush member and in transmission cooperation with the roller brush member; The ventilation pipe is provided with a dust extracting member which is located at the end of the roller brush member and extracts dust.

[0009] As a further optimization scheme of the present invention, the dust filter assembly further includes a first shaft, a second shaft and a belt-type running member, two first fixed blocks are symmetrically installed on the top of the ventilation pipe, two second fixed blocks are symmetrically installed on the bottom of the ventilation pipe, the two openings are respectively located between the two first fixed blocks and the two second fixed blocks, a first shaft is rotatably installed between the two first fixed blocks, a second shaft is rotatably installed between the two second fixed blocks, two symmetrically arranged belt-type running members are mounted on the first shaft and the second shaft, the flexible filter is connected between the two belt-type running members, and the first shaft and the second shaft are driven to rotate by a driving member; The belt-type operating part includes a first pulley, a second pulley and a conveyor belt. Two symmetrically arranged first pulleys are fixed on the first shaft rod, and two symmetrically arranged second pulleys are fixed on the second shaft rod. Conveyor belts are matched between the two first pulleys and the two second pulleys, and the flexible filter is connected between the two conveyor belts.

[0010] As a further optimization scheme of the present invention, the roller brush member includes a rotating rod, a roller column and bristles, a rotating rod located below the flexible filter screen is rotatably installed between the two second fixed blocks, a roller column is fixed on the rotating rod, and bristles are connected to the roller column in a radial shape and in contact with the bottom of the flexible filter screen, and the rotating rod and the second shaft rod are matched through the first transmission member; The first transmission member includes a second driving wheel, a second driven wheel and a second belt. The second shaft rod and the two ends of the rotating rod rotate through two second fixed blocks respectively. The second driving wheel is fixed at one end of the second shaft rod, and the second driven wheel is fixed at one end of the rotating rod. A second belt is matched between the second driving wheel and the second driven wheel.

[0011] As a further optimization scheme of the present invention, the scraper member includes a scraper ring, a limit block, a first reciprocating screw and a limit rod, a first reciprocating screw located below the roller is rotatably installed between the two second fixed blocks, a limit rod located below the first reciprocating screw is fixed between the two second fixed blocks, the limit block is sleeved on the first reciprocating screw and the limit rod, the limit block cooperates with the first reciprocating screw, the limit block is slidably connected with the limit rod, a scraper ring sleeved on the roller is fixed on the limit block, and the first reciprocating screw and the rotating rod are transmission-coordinated through a second transmission member; The second transmission member includes a third driving wheel, a third driven wheel and a third belt. One end of the first reciprocating screw rod rotates through a second fixed block. The third driving wheel is fixed to the other end of the rotating rod. The third driven wheel is fixed to one end of the first reciprocating screw rod. A third belt is provided between the third driving wheel and the third driven wheel.

[0012] As a further optimization scheme of the present invention, the dust extraction part includes a dust extraction nozzle, a dust extraction pipe and a dust extraction air pump. The dust extraction nozzle is installed on the inner wall of the second fixed block and is arranged toward the rotating rod. The dust extraction nozzle is connected to the dust extraction pipe, and the end of the dust extraction pipe away from the dust extraction nozzle is connected to the dust extraction air pump.

[0013] As a further optimization scheme of the present invention, the driving member includes a first driving wheel, a first driven wheel, a first belt and a motor, the two ends of the first shaft rod respectively rotate through two first fixed blocks, the first driving wheel is fixed at one end of the first shaft rod, the first driven wheel is fixed at the other end of the second shaft rod, a first belt is cooperated between the first driving wheel and the first driven wheel, a motor located at one end of the first shaft rod is installed on the first fixed block, and the output end of the motor is connected to one end of the first shaft rod.

[0014] As a further optimization scheme of the present invention, the transmission assembly includes a first bevel gear, a second assembly block, a transmission rod, a second bevel gear and a second reciprocating screw rod. The other end of the first shaft rod is fixed with the first bevel gear. Two symmetrically arranged first assembly blocks are installed on the back of the ventilation pipe. The slide is located between the two first assembly blocks. The second reciprocating screw rod is rotatably installed between the two first assembly blocks. The slider is sleeved on the second reciprocating screw rod and cooperates with it. A third bevel gear is installed on one end of the second reciprocating screw rod. The second assembly block is installed on the back of the ventilation pipe and is located between the first bevel gear and the third bevel gear. A vertically arranged transmission rod is rotatably connected to the second assembly block. Second bevel gears are fixed at both ends of the transmission rod. The two second bevel gears are respectively meshed with the first bevel gear and the third bevel gear.

[0015] The above technical solution of the present invention has the following beneficial technical effects: 1. During the ventilation process, the present invention starts the fan to guide the outdoor wind into the telescopic air pass member. At this time, the dust filter assembly is driven by the driving member to operate and drive the telescopic air pass member to reciprocate along the sliding mouth and gradually expand and retract. The telescopic exhaust member on the telescopic air pass member reciprocates along the inclined slot and gradually expands and retracts. When the telescopic exhaust member moves deeper into the tunnel, more exhaust holes are gradually expanded and opened. Through the dynamic adjustment of the telescopic air pass member and the telescopic exhaust member, more exhaust holes can be gradually opened in the deep tunnel, thereby expanding the ventilation range and making the wind entering the deep tunnel more uniform. This solves the problem of insufficient ventilation of traditional ventilation pipes at deep places, ensures that construction workers can obtain enough fresh air, and protects their health and safety.

[0016] 2. The present invention continuously drives the dust filter assembly at the air inlet end of the ventilation pipe to operate through the driving member, so that the flexible filter screen running to the air inlet end of the ventilation pipe is always kept clean, thereby improving the dust filtering effect. When the driving member drives the flexible filter screen to operate, it can drive the roller brush member to operate accordingly, and can automatically clean the dust attached to the surface of the flexible filter screen, thereby preventing the flexible filter screen from decreasing its filtering efficiency due to dust accumulation, thereby solving the problem of the traditional manual regular cleaning and replacement of the filter screen, and ensuring the continuous operation of the ventilation system. 3. The dust filter component can effectively intercept dust particles in the air, reduce the dust content entering the tunnel, ensure that the air breathed by construction workers is relatively clean, reduce irritation and damage to the respiratory system of construction workers, and improve the air quality in the tunnel; 4. When the roller brush member is running to clean the dust on the surface of the flexible filter, it can drive the scraping member to move back and forth along the roller brush member to scrape the dust cleaned on the roller brush member. The dust scraped on the roller brush member can be absorbed in time by the dust extraction member to prevent the scraped dust from adhering to the flexible filter again, thereby reducing the frequency of manual cleaning of the roller brush member and the flexible filter, reducing the maintenance workload and cost, improving the convenience of maintenance, making the maintenance of the ventilation pipe more efficient and convenient, ensuring the air quality in the tunnel, and providing a better breathing environment for construction personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a schematic diagram of the overall structure of a ventilation device for building tunnel construction.

[0018] Figure 2 This is a schematic diagram of the back structure of a ventilation device for building tunnel construction proposed by the present invention.

[0019] Figure 3 It is a schematic diagram of the internal structure of the ventilation pipe of the present invention.

[0020] Figure 4 It is a structural schematic diagram of the telescopic exhaust assembly of the present invention.

[0021] Figure 5 It is a schematic diagram of the folding structure of the telescopic air inlet piece and the telescopic air outlet piece of the present invention.

[0022] Figure 6 It is a schematic diagram of the unfolded structure of the telescopic exhaust member of the present invention.

[0023] Figure 7 It is a schematic diagram of the structure of the dust filter assembly and the driving component of the present invention.

[0024] Figure 8 It is a schematic structural diagram of the dust filter assembly of the present invention.

[0025] Fig. 9It is a schematic diagram of the structure of the roller brush member and the scraping member of the present invention.

[0026] Fig.10 It is a schematic structural diagram of the transmission assembly of the present invention.

[0027] 1. Ventilation pipe; 101. Fan; 102. Opening; 103. First fixed block; 104. Second fixed block; 105. Sliding mouth; 106. First assembly block; 107. Oblique notch; 2. Dust filter assembly; 21. Flexible filter screen; 22. First shaft rod; 23. Second shaft rod; 24. Belt running member; 241. First pulley; 242. Second pulley; 243. Conveyor belt; 3. Roller brush member; 31. Rotating rod; 32. Roller column; 33. Bristles; 4. Scraping member; 41. Scraping ring; 42. Stop block; 43. First reciprocating screw rod; 44. Stop rod; 5. Driving member; 51. First driving wheel; 52. First driven wheel; 53. First belt; 54. Motor; 6. Dust extraction member; 61. Dust extraction nozzle; 62. Dust extraction pipe; 63. Dust extraction air pump; 7. Transmission assembly; 71. First bevel gear; 72. Second assembly block; 73. Transmission rod; 74. Second bevel gear; 75. Second reciprocating screw rod; 76. Third bevel gear; 8. Telescopic exhaust assembly; 81. Telescopic air passing member; 811. Flexible air passing cover; 812. Docking frame; 813. Exhaust box; 814. Slider; 82. Telescopic exhaust member; 821. Exhaust duct; 822. Shaft cylinder; 823. Flexible exhaust part; 8231. Flexible duct; 8232. Docking ring; 8233. Exhaust shaft; 8234. Exhaust hole; 824. Guide rod; 91. First transmission member; 911. Second driving wheel; 912. Second driven wheel; 913. Second belt; 92. Second transmission member; 921. Third driving wheel; 922. Third driven wheel; 923. Third belt. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0029] like Figure 1-10 As shown, a ventilation device for building tunnel construction proposed by the present invention includes a ventilation pipe 1, a fan 101, a dust filter assembly 2 and a telescopic exhaust assembly 8; The dust filter assembly 2 and the fan 101 are sequentially arranged at the air inlet end of the ventilation pipe 1, and the telescopic exhaust assembly 8 is arranged in the ventilation pipe 1 and communicated with the fan 101; The telescopic exhaust assembly 8 includes a telescopic air passing member 81 and a telescopic exhaust member 82. The telescopic air passing member 81 is arranged in the ventilation pipe 1 and communicated with the fan 101. Slides 105 are provided on both sides of the ventilation pipe 1. The telescopic air passing member 81 and the slides 105 are slidably matched. The side of the ventilation pipe 1 is provided with oblique slots 107 symmetrically distributed along the slides 105. The telescopic exhaust member 82 is connected to the telescopic air passing member 81 and matched with the oblique slots 107. A driving member 5 is installed on the ventilation duct 1 for driving the dust filter assembly 2 to operate and driving the telescopic air passage member 81 to reciprocate along the slide 105; when the telescopic air passage member 81 reciprocates along the slide 105, it gradually expands and contracts, and the telescopic exhaust member 82 on the telescopic air passage member 81 reciprocates along the inclined slot 107 and gradually expands and contracts.

[0030] It should be noted that: after starting the fan 101, external air is sucked into the ventilation duct 1, firstly filtered for dust through the dust filter assembly 2, and the purified air enters the telescopic exhaust assembly 8. The driving member 5 drives the dust filter assembly 2 to operate while driving the telescopic air passing member 81 to move back and forth along the sliding mouth 105, and the telescopic exhaust member 82 moves back and forth along the inclined slot 107 and gradually expands and contracts, thereby realizing dynamic adjustment of the ventilation volume and ventilation range at different positions in the tunnel, so as to meet the ventilation needs during the tunnel construction process, ensure the uniform distribution of air in the tunnel, and provide a good ventilation environment for construction personnel.

[0031] like Figure 3 and Figure 4 As shown, in the present embodiment, the telescopic air passing member 81 comprises a flexible air passing cover 811, a docking frame 812, an exhaust box 813 and a slider 814, and the connection nodes of several flexible air passing covers 811 are connected with the docking frame 812, the flexible air passing cover 811 at one end is connected with the exhaust box 813, and the flexible air passing cover 811 at the other end is connected with the fan 101, and an air passing channel connected with the exhaust box 813 is formed in several flexible air passing covers 811 and the docking frame 812, the telescopic air exhaust member 82 is connected with one side of the exhaust box 813, and the slider 814 is installed on the other side of the exhaust box 813, the telescopic air exhaust member 82 and the slider 814 are respectively slidably matched with the two sliding openings 105, and the slider 814 is transmitted and matched with the dust filter assembly 2 through the transmission assembly 7.

[0032] It should be noted that: under the power provided by the fan 101 and the drive of the driving member 5, the air enters the wind channel formed by the flexible wind hood 811 and the docking frame 812. When the dust filter component 2 is running, the slider 814 is driven to move through the transmission component 7, so that the entire telescopic wind component 81 moves along the sliding mouth 105, changing the air flow path and exhaust range in the ventilation pipe 1, ensuring the dynamic adjustment of the ventilation effect, so that sufficient fresh air can be obtained deep in the tunnel.

[0033] like Figure 1 , Figure 4 , Figure 5 and Figure 6 As shown, in this embodiment, the telescopic exhaust member 82 includes an exhaust pipe 821, a shaft cylinder 822, a flexible exhaust portion 823 and a guide rod 824. The side of the exhaust box 813 is connected with an exhaust pipe 821 that slidably cooperates with one of the sliding openings 105. The end of the exhaust pipe 821 is connected with the shaft cylinder 822. Both ends of the shaft cylinder 822 are connected with flexible exhaust portions 823. The two flexible exhaust portions 823 are rotatably connected with guide rods 824. The two guide rods 824 are respectively slidably cooperated with the two inclined slots 107. The flexible exhaust part 823 includes a flexible tube 8231, a docking ring 8232, an exhaust shaft 8233 and an exhaust hole 8234. The connection nodes of several flexible tubes 8231 are connected with docking rings 8232. The flexible tube 8231 at one end is connected with the shaft cylinder 822, and the flexible tube 8231 at the other end is connected with the exhaust shaft 8233. Exhaust holes 8234 are provided on the peripheries of the exhaust shaft 8233 and the flexible tube 8231. The two guide rods 824 are rotatably connected to the peripheries of the two exhaust shafts 8233 respectively.

[0034] It should be noted that: the exhaust pipe 821 connects the exhaust box 813 and the shaft cylinder 822, guides the air to the shaft cylinder 822, and the flexible exhaust parts 823 at both ends of the shaft cylinder 822 realize the expansion and contraction action under the cooperation of the guide rod 824 and the inclined notch 107. The flexible pipe 8231, the docking ring 8232, the exhaust shaft 8233 and the exhaust hole 8234 in the flexible exhaust part 823 together constitute an exhaust structure. When the flexible exhaust part 823 is expanded, the exhaust holes 8234 are gradually opened and increased, increasing the exhaust area and ventilation volume. When it is contracted, the exhaust is reduced, thereby controlling the ventilation conditions at different positions in the tunnel; The air enters the shaft tube 822 from the exhaust box 813 through the exhaust pipe 821 and then flows to the flexible exhaust part 823. As the guide rod 824 moves on the inclined slot 107, the guide rod 824 guides the flexible exhaust part 823 to expand or contract, thereby changing the opening and closing degree and ventilation direction of the exhaust hole 8234, and cooperating with the movement of the telescopic air passing piece 81 to adjust the air distribution in the tunnel, ensure ventilation uniformity, and meet the ventilation needs of various areas of tunnel construction.

[0035] like Figure 1 and Figure 8 As shown, in this embodiment, the dust filter assembly 2 includes a flexible filter screen 21, and the air inlet end of the ventilation pipe 1 is provided with two symmetrically arranged openings 102, and the flexible filter screen 21 passes through the two openings 102. A roller brush member 3 that abuts against the bottom of the flexible filter screen 21 is installed on the ventilation pipe 1, and the roller brush member 3 is in transmission cooperation with the dust filter assembly 2, and the scraper 4 is sleeved on the roller brush member 3 and in transmission cooperation with it; A dust extracting member 6 is installed on the ventilation pipe 1 and is located at the end of the roller brush member 3 to extract dust.

[0036] During the tunnel construction process, the air at the construction site contains a large amount of dust. If it directly enters the tunnel, it may cause irritation and damage to the respiratory system of the workers. Therefore, in order to reduce the dust content in the air entering the tunnel, a filter is usually set at the air inlet end of the ventilation pipe 1. The filter can effectively intercept dust particles in the air and prevent them from entering the ventilation pipe 1, thereby ensuring that the air entering the tunnel is relatively clean. During the construction of the building tunnel, it is necessary to continuously ventilate the tunnel to ensure the safety of construction workers and the quality of the construction environment. However, as the use time increases, a large amount of dust will gradually adhere to the surface of the filter, causing its filtration efficiency to gradually decrease. In this case, the air inlet end of the ventilation pipe 1 cannot effectively filter the dust particles in the air, which reduces the quality of the air entering the tunnel, which may cause irritation and damage to the respiratory system of the construction workers. In addition, in order to maintain the normal operation and filtration effect of the ventilation system, the staff needs to clean or replace the filter regularly, which not only increases the maintenance workload and cost, but also may cause the performance of the ventilation system to decline due to untimely maintenance, affecting the air quality in the tunnel. For this reason, it is improved as follows: When air enters the ventilation duct 1, it first passes through the flexible filter screen 21 to filter dust. The driving member 5 drives the dust filter assembly 2 to operate, driving the roller brush member 3 to rotate and clean the flexible filter screen 21. At the same time, it drives the scraping member 4 to move back and forth to scrape the dust on the roller brush member 3. The scraped dust is extracted and discharged by the dust extraction member 6, forming a complete automatic dust filtering and cleaning cycle, ensuring the continuous operation of the dust filter assembly 2 and maintaining the stable operation and air quality of the ventilation system.

[0037] like Figure 7 and Figure 8 As shown, in this embodiment, the dust filter assembly 2 further includes a first shaft 22, a second shaft 23 and a belt-type running member 24, two first fixed blocks 103 are symmetrically installed on the top of the ventilation pipe 1, and two second fixed blocks 104 are symmetrically installed on the bottom of the ventilation pipe 1, and the two openings 102 are respectively located between the two first fixed blocks 103 and the two second fixed blocks 104, the first shaft 22 is rotatably installed between the two first fixed blocks 103, and the second shaft 23 is rotatably installed between the two second fixed blocks 104, and two symmetrically arranged belt-type running members 24 are mounted on the first shaft 22 and the second shaft 23, and the flexible filter screen 21 is connected between the two belt-type running members 24, and the first shaft 22 and the second shaft 23 are driven to rotate by the driving member 5; The belt-type operating member 24 includes a first pulley 241, a second pulley 242 and a conveyor belt 243. Two symmetrically arranged first pulleys 241 are fixed on the first shaft 22, and two symmetrically arranged second pulleys 242 are fixed on the second shaft 23. Conveyor belts 243 are provided between the two first pulleys 241 and the two second pulleys 242, and the flexible filter screen 21 is connected between the two conveyor belts 243.

[0038] It should be noted that: the driving member 5 drives the first shaft 22 and the second shaft 23 to rotate. Since the belt running member 24 is mounted on the first shaft 22 and the second shaft 23, and the flexible filter screen 21 is connected between the two belt running members 24, the rotation of the first shaft 22 and the second shaft 23 drives the belt running member 24 to operate, and then drives the flexible filter screen 21 to circulate, so that the flexible filter screen 21 that runs to the air inlet end of the ventilation duct 1 is always kept clean, thereby improving the filtering effect of dust. The specific operation of the operation of the belt running member 24 is: the rotation of the first shaft 22 drives the first pulley 241 thereon to rotate, and the rotation of the second shaft 23 drives the second pulley 242 thereon to rotate. Since the conveyor belt 243 cooperates with the first pulley 241 and the second pulley 242 respectively, the rotation of the first pulley 241 and the second pulley 242 transmits power through the conveyor belt 243, driving the flexible filter screen 21 to operate.

[0039] like Figure 8 and Fig. 9 As shown, in this embodiment, the roller brush member 3 includes a rotating rod 31, a roller 32 and bristles 33. The rotating rod 31 located below the flexible filter 21 is rotatably installed between the two second fixed blocks 104. The roller 32 is fixed on the rotating rod 31. The roller 32 is connected with bristles 33 that are radially connected and contact the bottom of the flexible filter 21. The rotating rod 31 and the second shaft 23 are matched through the first transmission member 91. The first transmission member 91 includes a second driving wheel 911, a second driven wheel 912 and a second belt 913. The second shaft 23 and the two ends of the rotating rod 31 rotate through the two second fixed blocks 104 respectively. The second driving wheel 911 is fixed at one end of the second shaft 23, and the second driven wheel 912 is fixed at one end of the rotating rod 31. A second belt 913 is cooperated between the second driving wheel 911 and the second driven wheel 912.

[0040] It should be noted that: the second shaft 23 rotates under the drive of the driving member 5, and the second driving wheel 911 thereon rotates accordingly, and the power is transmitted to the second driven wheel 912 through the second belt 913, thereby driving the rotating rod 31 to rotate, and the rotating rod 31 drives the roller 32 and the bristles 33 to rotate. The bristles 33 clean the bottom of the flexible filter 21 in operation to prevent the flexible filter 21 from having a reduced filtering efficiency due to dust accumulation, thereby solving the problem of the traditional need for manual regular cleaning and replacement of the filter, and ensuring the continuous operation of the ventilation system.

[0041] like Fig. 9 As shown, in this embodiment, the scraper 4 includes a scraper ring 41, a limit block 42, a first reciprocating screw rod 43 and a limit rod 44, the first reciprocating screw rod 43 located below the roller column 32 is rotatably installed between the two second fixed blocks 104, the limit rod 44 located below the first reciprocating screw rod 43 is fixed between the two second fixed blocks 104, the limit block 42 is sleeved on the first reciprocating screw rod 43 and the limit rod 44, the limit block 42 cooperates with the first reciprocating screw rod 43, the limit block 42 is slidably connected with the limit rod 44, the scraper ring 41 sleeved on the roller column 32 is fixed on the limit block 42, and the first reciprocating screw rod 43 and the rotating rod 31 are transmission-coordinated through the second transmission member 92; The second transmission member 92 includes a third driving wheel 921, a third driven wheel 922 and a third belt 923. One end of the first reciprocating screw rod 43 rotates through a second fixed block 104. The third driving wheel 921 is fixed to the other end of the rotating rod 31. The third driven wheel 922 is fixed to one end of the first reciprocating screw rod 43. A third belt 923 is cooperated between the third driving wheel 921 and the third driven wheel 922.

[0042] It should be noted that when the rotating rod 31 rotates, the third driving wheel 921 thereon is driven to rotate, and the power is transmitted to the third driven wheel 922 through the third belt 923, thereby driving the first reciprocating screw 43 to rotate. The limit block 42 is sleeved on the first reciprocating screw 43. Due to the rotation of the first reciprocating screw 43, the limit block 42 can only make reciprocating linear motion along the axis direction of the first reciprocating screw 43 under the restriction of the limit rod 44. The scraping ring 41 on the limit block 42 moves back and forth along the axis of the roller 32 accordingly, scrapes the dust on the bristles 33, and maintains the effect of the bristles 33 cleaning the flexible filter 21.

[0043] like Figure 7 and Figure 8 As shown, in this embodiment, the dust extraction part 6 includes a dust extraction nozzle 61, a dust extraction pipe 62 and a dust extraction air pump 63. The dust extraction nozzle 61 is installed on the inner wall of the second fixed block 104 and is arranged toward the rotating rod 31. The dust extraction pipe 62 is connected to the dust extraction nozzle 61, and the end of the dust extraction pipe 62 away from the dust extraction nozzle 61 is connected to the dust extraction air pump 63.

[0044] It should be noted that: when the flexible filter 21 is cleaned by the bristles 33 on the roller 32, the dust extraction air pump 63 is started to generate negative pressure, and the air near the dust extraction nozzle 61 is sucked in through the dust extraction pipe 62. Since the dust extraction nozzle 61 is set toward the rotating rod 31, the dust scraped off by the scraper 4 is sucked into the dust extraction pipe 62 and discharged through the dust extraction air pump 63 under the suction force of the dust extraction nozzle 61, preventing the scraped dust from adhering to the flexible filter 21 again, reducing the frequency of manual cleaning of the roller brush 3 and the flexible filter 21, reducing the maintenance workload and cost, and improving the convenience of maintenance.

[0045] like Figure 7 and Figure 8 As shown, in this embodiment, the driving member 5 includes a first driving wheel 51, a first driven wheel 52, a first belt 53 and a motor 54. The two ends of the first shaft 22 rotate through two first fixed blocks 103 respectively. The first driving wheel 51 is fixed at one end of the first shaft 22, and the first driven wheel 52 is fixed at the other end of the second shaft 23. The first belt 53 is matched between the first driving wheel 51 and the first driven wheel 52. The motor 54 located at one end of the first shaft 22 is installed on the first fixed block 103, and the output end of the motor 54 is connected to one end of the first shaft 22.

[0046] It should be noted that after the motor 54 is started, it drives the first shaft 22 to rotate, and through the transmission of the first belt 53, the first driving wheel 51 and the first driven wheel 52, the second shaft 23 rotates synchronously, driving the dust filter assembly 2 to work, and at the same time drives the telescopic air passing piece 81 to move through the transmission assembly 7, thereby realizing the synchronous operation and dynamic adjustment of the ventilation and dust filtering functions, meeting the ventilation needs of tunnel construction, and ensuring the health and safety of construction workers.

[0047] like Fig.10 As shown, in this embodiment, the transmission assembly 7 includes a first bevel gear 71, a second assembly block 72, a transmission rod 73, a second bevel gear 74 and a second reciprocating screw rod 75. The first bevel gear 71 is fixed to the other end of the first shaft rod 22. Two symmetrically arranged first assembly blocks 106 are installed on the back of the ventilation pipe 1. The slide 105 is located between the two first assembly blocks 106. The second reciprocating screw rod 75 is rotatably installed between the two first assembly blocks 106. The slider 814 is sleeved on the second reciprocating screw rod 75 and cooperates with it. A third bevel gear 76 is installed at one end of the second reciprocating screw rod 75. The second assembly block 72 is installed on the back of the ventilation pipe 1 and is located between the first bevel gear 71 and the third bevel gear 76. A vertically arranged transmission rod 73 is rotatably connected to the second assembly block 72. Second bevel gears 74 are fixed to both ends of the transmission rod 73. The two second bevel gears 74 are respectively meshed with the first bevel gear 71 and the third bevel gear 76.

[0048] The second bevel gear 74 at the other end of the transmission rod 73 meshes with the third bevel gear 76, thereby driving the second reciprocating screw rod 75 to rotate. The slider 814 is sleeved on the second reciprocating screw rod 75. As the second reciprocating screw rod 75 rotates, the slider 814 drives the exhaust box 813 to reciprocate along the sliding mouth 105. When the exhaust box 813 pushes the flexible air hood 811 to abut against the docking frame 812, it will not affect the air entering the exhaust box 813 from the fan 101. At the same time, the dust filter assembly 2 is also driven by the motor 54 to operate. The entire ventilation device realizes the integrated work of ventilation, dust filtering and ventilation regulation, ensures the cleanliness and uniform distribution of the air in the tunnel, and provides good ventilation conditions for tunnel construction.

[0049] The specific working principle of the present invention is as follows: When the ventilation is started, the motor 54 drives the first shaft 22 to rotate, and the second shaft 23 is synchronously rotated through the transmission of the first belt 53, the first driving wheel 51 and the first driven wheel 52, and the driving belt running member 24 drives the flexible filter 21 to circulate at the air inlet end of the ventilation pipe 1, and continuously filters the air entering the ventilation pipe 1. The fan 101 operates to generate airflow, and the external air is sucked into the ventilation pipe 1. The air filtered by the dust filter assembly 2 enters the telescopic air passing member 81, and the first shaft 22 rotates to drive the first bevel gear 71 The second bevel gear 74 and the third bevel gear 76 on the transmission rod 73 are meshed and driven to rotate the second reciprocating screw rod 75. The slider 814 drives the telescopic air passing member 81 to move back and forth along the slide 105 and gradually expand and retract under the cooperation of the second reciprocating screw rod 75 and the slide 105. When the telescopic air passing member 81 moves, the telescopic exhaust member 82 on one side of the exhaust box 813 moves back and forth along the oblique slot 107 and gradually expands and retracts under the coordinated action of the exhaust pipe 821, the shaft cylinder 822, the guide rod 824 and the oblique slot 107. The flexible exhaust part 823 gradually expands and retracts. When the telescopic exhaust part 82 moves deeper into the tunnel, the flexible exhaust part 823 gradually expands and opens more exhaust holes 8234, expanding the ventilation range and making the wind entering the deep part of the tunnel more uniform. In the dust filtering process, the second shaft 23 drives the rotating rod 31 of the roller brush part 3 to rotate through the first transmission part 91, and the bristles 33 on the roller column 32 clean the bottom of the flexible filter screen 21. The rotating rod 31 drives the first reciprocating screw 43 of the scraping part 4 to rotate through the second transmission part 92, so that the limit block 42 drives The scraping ring 41 reciprocates along the roller 32 to scrape the dust on the roller brush member 3. The scraped dust is collected by the dust suction nozzle 61 of the dust suction member 6 and discharged from the ventilation pipe 1 through the dust suction pipe 62 under the suction force of the dust suction air pump 63. Through the close cooperation and coordinated work of the above-mentioned components, the present invention realizes the functions of ventilation, dust filtration and dynamic adjustment of ventilation effect, effectively solves the problems of insufficient ventilation of the traditional ventilation pipe 1 in the deep tunnel and the difficulty of cleaning and maintaining the filter, and provides good ventilation guarantee and clean air environment for tunnel construction.

[0050] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.

Claims

1. A ventilation device for building tunnel construction, characterized in that: It comprises a ventilation pipe (1), a fan (101), a dust filter assembly (2) and a telescopic exhaust assembly (8); The dust filter assembly (2) and the fan (101) are arranged in sequence at the air inlet end of the ventilation pipe (1), and the telescopic exhaust assembly (8) is arranged in the ventilation pipe (1) and is connected to the fan (101); The telescopic exhaust assembly (8) comprises a telescopic air passing piece (81) and a telescopic exhaust piece (82); the telescopic air passing piece (81) is arranged in the ventilation pipe (1) and is connected to the fan (101); both sides of the ventilation pipe (1) are provided with sliding openings (105); the telescopic air passing piece (81) and the sliding openings (105) are slidably matched; the side surface of the ventilation pipe (1) is provided with oblique slots (107) symmetrically distributed along the sliding openings (105); the telescopic exhaust piece (82) is connected to the telescopic air passing piece (81) and is matched with the oblique slots (107); The ventilation pipe (1) is provided with a driving member (5) for driving the dust filter assembly (2) to operate and driving the telescopic air passing member (81) to move back and forth along the sliding opening (105); when the telescopic air passing member (81) moves back and forth along the sliding opening (105), it gradually expands and contracts, and the telescopic air exhaust member (82) on the telescopic air passing member (81) moves back and forth along the inclined slot opening (107) and gradually expands and contracts.

2. A ventilation device for building tunnel construction according to claim 1, characterized in that: The telescopic air passing member (81) comprises a flexible air passing cover (811), a docking frame (812), an exhaust box (813) and a slider (814); the connection nodes of a plurality of the flexible air passing covers (811) are connected to the docking frame (812); the flexible air passing cover (811) at one end is connected to the exhaust box (813); the flexible air passing cover (811) at the other end is connected to the fan (101); air passing channels connected to the exhaust box (813) are formed in the plurality of the flexible air passing covers (811) and the docking frame (812); the telescopic air exhaust member (82) is connected to one side of the exhaust box (813); the other side of the exhaust box (813) is provided with a slider (814); the telescopic air exhaust member (82) and the slider (814) are respectively slidably matched with two sliding openings (105); the slider (814) and the dust filter assembly (2) are transmission-matched via a transmission assembly (7).

3. A ventilation device for building tunnel construction according to claim 2, characterized in that: The telescopic exhaust member (82) comprises an exhaust pipe (821), a shaft cylinder (822), a flexible exhaust portion (823) and a guide rod (824); the exhaust box (813) is connected to a side surface with an exhaust pipe (821) that slidably cooperates with one of the sliding openings (105); the end of the exhaust pipe (821) is connected to the shaft cylinder (822); both ends of the shaft cylinder (822) are connected to the flexible exhaust portions (823); the two flexible exhaust portions (823) are rotatably connected to the guide rods (824); the two guide rods (824) are respectively slidably cooperated with the two inclined slots (107); The flexible exhaust portion (823) comprises a flexible tube (8231), a docking ring (8232), an exhaust shaft (8233) and an exhaust hole (8234); a plurality of connection nodes of the flexible tubes (8231) are connected to the docking ring (8232); the flexible tube (8231) at one end is connected to the shaft cylinder (822); the flexible tube (8231) at the other end is connected to the exhaust shaft (8233); the exhaust holes (8234) are provided on the peripheries of the exhaust shaft (8233) and the flexible tube (8231); and the two guide rods (824) are rotatably connected to the peripheries of the two exhaust shafts (8233), respectively.

4. A ventilation device for building tunnel construction according to claim 3, characterized in that: The dust filter assembly (2) comprises a flexible filter screen (21); the air inlet end of the ventilation pipe (1) is provided with two symmetrically arranged openings (102); the flexible filter screen (21) passes through the two openings (102); a roller brush member (3) is mounted on the ventilation pipe (1) and contacts the bottom of the flexible filter screen (21); the roller brush member (3) is in driving cooperation with the dust filter assembly (2); and the scraper member (4) is sleeved on the roller brush member (3) and is in driving cooperation with the roller brush member (3); The ventilation pipe (1) is provided with a dust extraction member (6) which is located at the end of the roller brush member (3) and extracts dust.

5. A ventilation device for building tunnel construction according to claim 4, characterized in that: The dust filter assembly (2) further comprises a first shaft (22), a second shaft (23) and a belt-type running member (24); two first fixed blocks (103) are symmetrically mounted on the top of the ventilation pipe (1); two second fixed blocks (104) are symmetrically mounted on the bottom of the ventilation pipe (1); the two openings (102) are respectively located between the two first fixed blocks (103) and the two second fixed blocks (104); a first shaft (22) is rotatably mounted between the two first fixed blocks (103); a second shaft (23) is rotatably mounted between the two second fixed blocks (104); two symmetrically arranged belt-type running members (24) are sleeved on the first shaft (22) and the second shaft (23); the flexible filter screen (21) is connected between the two belt-type running members (24); the first shaft (22) and the second shaft (23) are driven to rotate by a driving member (5); The belt-type running member (24) comprises a first pulley (241), a second pulley (242) and a conveyor belt (243); two symmetrically arranged first pulleys (241) are fixed on the first shaft (22); two symmetrically arranged second pulleys (242) are fixed on the second shaft (23); a conveyor belt (243) is provided between the two first pulleys (241) and the two second pulleys (242); and the flexible filter screen (21) is connected between the two conveyor belts (243).

6. A ventilation device for building tunnel construction according to claim 5, characterized in that: The roller brush member (3) comprises a rotating rod (31), a roller column (32) and bristles (33); a rotating rod (31) located below the flexible filter screen (21) is rotatably mounted between the two second fixed blocks (104); a roller column (32) is fixed on the rotating rod (31); bristles (33) are connected to the roller column (32) in a radial shape and in contact with the bottom of the flexible filter screen (21); the rotating rod (31) and the second shaft (23) are in transmission cooperation via a first transmission member (91); The first transmission member (91) comprises a second driving wheel (911), a second driven wheel (912) and a second belt (913); the second shaft (23) and the two ends of the rotating rod (31) rotate and pass through two second fixed blocks (104) respectively; the second driving wheel (911) is fixed to one end of the second shaft (23); the second driven wheel (912) is fixed to one end of the rotating rod (31); and a second belt (913) is provided between the second driving wheel (911) and the second driven wheel (912).

7. A ventilation device for building tunnel construction according to claim 6, characterized in that: The scraper (4) comprises a scraper ring (41), a limit block (42), a first reciprocating screw (43) and a limit rod (44); the first reciprocating screw (43) located below the roller (32) is rotatably mounted between the two second fixed blocks (104); the limit rod (44) located below the first reciprocating screw (43) is fixed between the two second fixed blocks (104); the limit block (42) is sleeved on the first reciprocating screw (43) and the limit rod (44); the limit block (42) cooperates with the first reciprocating screw (43); the limit block (42) and the limit rod (44) are slidably connected; the scraper ring (41) sleeved on the roller (32) is fixed on the limit block (42); the first reciprocating screw (43) and the rotating rod (31) are transmission-coordinated via a second transmission member (92); The second transmission member (92) comprises a third driving wheel (921), a third driven wheel (922) and a third belt (923); one end of the first reciprocating screw rod (43) rotates and passes through a second fixed block (104); the third driving wheel (921) is fixed to the other end of the rotating rod (31); the third driven wheel (922) is fixed to one end of the first reciprocating screw rod (43); and a third belt (923) is provided between the third driving wheel (921) and the third driven wheel (922).

8. A ventilation device for building tunnel construction according to claim 7, characterized in that: The dust extraction member (6) comprises a dust extraction nozzle (61), a dust extraction pipe (62) and a dust extraction air pump (63); the dust extraction nozzle (61) is mounted on the inner wall of the second fixed block (104) and is arranged toward the rotating rod (31); the dust extraction pipe (62) is connected to the dust extraction nozzle (61); and one end of the dust extraction pipe (62) away from the dust extraction nozzle (61) is connected to the dust extraction air pump (63).

9. A ventilation device for building tunnel construction according to claim 8, characterized in that: The driving member (5) comprises a first driving wheel (51), a first driven wheel (52), a first belt (53) and a motor (54); the two ends of the first shaft (22) respectively rotate and pass through two first fixing blocks (103); the first driving wheel (51) is fixed to one end of the first shaft (22); the first driven wheel (52) is fixed to the other end of the second shaft (23); a first belt (53) is provided between the first driving wheel (51) and the first driven wheel (52); a motor (54) located at one end of the first shaft (22) is installed on the first fixing block (103); and an output end of the motor (54) is connected to one end of the first shaft (22).

10. A ventilation device for building tunnel construction according to claim 9, characterized in that: The transmission assembly (7) comprises a first bevel gear (71), a second assembly block (72), a transmission rod (73), a second bevel gear (74) and a second reciprocating screw rod (75); the first bevel gear (71) is fixed to the other end of the first shaft rod (22); two symmetrically arranged first assembly blocks (106) are installed on the back of the ventilation pipe (1); the sliding opening (105) is located between the two first assembly blocks (106); the second reciprocating screw rod (75) is rotatably installed between the two first assembly blocks (106); the sliding block (814) is sleeved A third bevel gear (76) is mounted on and in cooperation with the second reciprocating screw rod (75). The second assembly block (72) is mounted on the back of the ventilation pipe (1) and is located between the first bevel gear (71) and the third bevel gear (76). A vertically arranged transmission rod (73) is rotatably connected to the second assembly block (72). Second bevel gears (74) are fixed at both ends of the transmission rod (73). The two second bevel gears (74) are respectively meshed with the first bevel gear (71) and the third bevel gear (76).

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