Air purification equipment with automatic cleaning function applied to tunnel

Abstract

The invention relates to air purification equipment with an automatic cleaning function applied to a tunnel. The air purification equipment comprises a frame provided with an air inlet and an air outlet, and an electrostatic module and a fan module are arranged in the frame; the cleaning device is characterized in that a cleaning module is further arranged in the frame; the cleaning module comprises a main water inlet pipe, a branch water outlet pipe and a rotating head, the main water inlet pipe is supplied with water by a water pump, the rotating head is installed at the water outlet end of the main water inlet pipe through a rotating connector, the rotating head is driven by a motor to rotate around the axis of the rotating head, and a connecting channel is formed in the rotating head; the water outlet ends of the branch water outlet pipes are aligned with the corresponding electrostatic modules. After the electrostatic module is used for a long time, the cleaning module is controlled to work, the electrostatic module is washed with high-pressure water, and the air purification equipment can be cleaned and maintained without being detached from the tunnel. The branch water outlet pipes spray water while rotating, it is ensured that sprayed water can cover the whole electrostatic module as much as possible, and the cleaning effect is excellent.

Description

Technical Field

[0001] This invention belongs to the technical field of air purification equipment, and particularly relates to an air purification device for automatic cleaning of tunnel zones. Background Technology

[0002] With the rapid development of the domestic economy, transportation construction tasks are becoming increasingly arduous, and highway construction is diversifying from above-ground to underground. Currently, with the development of domestic tunnel boring machine (TBM) equipment, the construction of tunnel highways is progressing rapidly, and the distances of tunnel highway construction are becoming increasingly longer. Therefore, higher requirements are placed on the air quality inside tunnels. How to reliably and effectively solve the problem of air cleanliness in a confined space is of paramount importance. A key indicator of air cleanliness is particulate matter, which mainly originates from the following sources: ① brought in by vehicles entering from outside the tunnel; ② generated by the tunnel walls and road surface; ③ generated by vehicle tire friction; ④ generated inside vehicles (including from smoking and goods); ⑤ generated by vehicle exhaust.

[0003] Currently, the most commonly used tunnel bypass air purification system combines an axial flow fan with an air purifier. The axial flow fan provides power to the air purification system, achieving the desired air purification effect. For example, Chinese invention patent application ZL202110762243.9 (publication number CN113577915A), entitled "A Tunnel Air Purification System," discloses such a bypass air purification system, including a bypass channel, a tunnel air inlet at one end of the bypass channel, a tunnel air outlet at the other end of the bypass channel, an electrostatic precipitator, denitrification equipment, and a silencer within the bypass channel. However, tunnel bypass air purification systems using axial flow fans require significant installation space, resulting in high civil engineering and equipment investment, high operation and maintenance costs, high energy consumption, and poor economic efficiency. Furthermore, tunnel bypass air purification systems using axial flow fans are only suitable for new projects and are not suitable for retrofitting existing tunnel air purification systems, especially in river tunnels (where it is inconvenient to install a bypass purification channel alongside the main tunnel).

[0004] Therefore, it is a technical problem that urgently needs to be solved by those skilled in the art to develop an air purification device that is suitable for use in existing tunnels, easy to assemble, has good air purification effect, low cost, and is easy to clean. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an air purification device with a reasonable structure and self-cleaning function for automatic cleaning of tunnels, which is in view of the above-mentioned existing technology.

[0006] The technical solution adopted by this invention to solve the above-mentioned technical problems is as follows: an air purification device for automatic cleaning of tunnel zones, comprising a hollow frame, an air inlet at the front end of the frame, and an air outlet at the rear end of the frame. An electrostatic module and a fan module are disposed within the frame. The fan module is positioned near the air outlet. The fan module is used to draw polluted air in through the air inlet, purify it through the electrostatic module, and then discharge the purified air through the air outlet. The device is characterized in that: a cleaning module for high-pressure water rinsing of the electrostatic module is also disposed within the frame, and the cleaning module is positioned near the air inlet. The electrostatic module is located between the cleaning module and the fan module. The cleaning module includes a main water inlet pipe, a branch water outlet pipe, and a rotating head. The main water inlet pipe is supplied with water by a water pump built into or placed outside the frame. The rotating head is installed at the outlet end of the main water inlet pipe through a rotating joint. The rotating head is directly or indirectly driven by a motor and can rotate around its own axis. The rotating head has a through-axis connecting channel. The branch water outlet pipe is installed at the front end of the rotating head through a pipe joint and can rotate with it. The length direction of the branch water outlet pipe is perpendicular to the axis direction of the rotating head. The outlet end of the branch water outlet pipe is aligned with the corresponding electrostatic module.

[0007] To improve the air purification efficiency of the air purification equipment, the above-mentioned electrostatic modules and fan modules are arranged in multiple sets and side by side. Adjacent sets of electrostatic modules are electrically connected to each other, and adjacent sets of fan modules are electrically connected to each other. The main water inlet pipe has multiple outlets, and each outlet of the main water inlet pipe is equipped with a rotating head.

[0008] As an improvement, each rotating head corresponds to two branch water pipes, and the pipe connector is a tee connector. The pipe connector through which the two branch water pipes pass is installed at the front end of the rotating head; the outlet end of the branch water pipe is equipped with a high-pressure nozzle. There are two vertically arranged branch water pipes, each with multiple outlet ends. This allows the rotating head to spray water onto the electrostatic module more quickly and over a wider area, resulting in better cleaning. The high-pressure nozzle further enhances the water pressure, further improving the cleaning effect.

[0009] To ensure smooth rotation of the rotating head around its own axis, as an improvement, the aforementioned motor is connected to the rotating head via a gear transmission assembly. This gear assembly includes a driving gear and a transmission gear that mesh with each other. The driving gear is mounted on the motor's output shaft, and the transmission gear is located on the rotating head. The advantages of gear transmission are high transmission accuracy, smooth and reliable transmission, and a large possible transmission ratio. Of course, other transmission methods, such as belt drives, can also be chosen.

[0010] In a further improvement, the aforementioned transmission gear set also includes an auxiliary gear, which is positioned below and meshes with the transmission gear. The auxiliary gear provides auxiliary support to the transmission gear, ensuring smooth and reliable transmission of the gear set.

[0011] Furthermore, a wind speed sensor is also included within the aforementioned framework, positioned near the air inlet. This wind speed sensor enables automatic cleaning. It senses the airflow; after the electrostatic module has been in use for a period, dust accumulates. Once this dust reaches a certain level, it affects the air purification effect and reduces the airflow, causing the wind speed sensor to rotate at a lower speed. When the speed drops to a preset value, a signal is sent to the motor and water pump to control the cleaning operation. During the cleaning process, the electrostatic module and fan module are powered off.

[0012] Over time, the electrostatic module accumulates a large amount of dust. After rinsing, this dust builds up into sludge. To further improve the drainage of this sludge from the frame, a water collection trough is installed inside the frame, located below the electrostatic module. A drain pipe is located on the side wall of the frame, connected to the water collection trough to drain the wastewater from the trough out of the frame. The accumulated sludge flows into the water collection trough and is finally discharged from the frame through the drain pipe.

[0013] To reduce vibration, the fan module is mounted within a frame at both ends using shock-absorbing springs. The fan in the module is a centrifugal fan. An air inlet grille is provided at the air inlet of the frame, and an air outlet grille is provided at the air outlet. The air inlet and outlet grilles prevent foreign objects from entering the frame and damaging its internal components.

[0014] To facilitate the hoisting of the air purification equipment inside the tunnel, further improvements are made, including multiple vertically arranged connecting screws fixed at intervals on the frame. Each connecting screw has an upper threaded section, a lower threaded section, and a smooth section. The smooth section is located between the upper threaded section and the lower threaded section. The connecting screw passes through the frame. The upper threaded section protrudes from the top surface of the frame and is threadedly connected to an upper nut, which is pressed against the top surface of the frame. The lower threaded section protrudes from the bottom surface of the frame and is threadedly connected to a lower nut, which is pressed against the bottom surface of the frame.

[0015] The connecting screw can be connected to the top screw fixed to the tunnel ceiling via a connecting nut. During installation, the connecting nut is pre-threaded onto the top screw at the tunnel ceiling. Then, the air purification equipment is lifted to a position close to the inner ceiling wall of the tunnel, aligning the connecting screw on the air purification equipment with the top screw. The upper nut is then rotated, causing it to also be threaded onto the top screw. The air purification equipment is then suspended below the top screw via the upper nut, completing the assembly. Disassembly is the reverse of the installation process. Rotating the upper nut also allows for position adjustment to ensure the equipment is installed level.

[0016] Preferably, there are six connecting screws arranged in two rows and three columns. The number of connecting screws can be selected according to the size and weight of the air purification equipment, but generally at least four connecting screws are required. To facilitate the transportation of the air purification equipment, the top surface of the frame is provided with multiple lifting rings for easy hoisting.

[0017] Compared with existing technologies, the advantages of this invention are as follows: This purification equipment includes a cleaning module, an electrostatic module, and a fan module housed within a frame. The fan module draws in contaminated air through the air inlet, purifies it through the electrostatic module, and then discharges the purified air through the air outlet. The electrostatic module can efficiently adsorb large particulate pollutants in the tunnel. After prolonged use, the cleaning module is activated to perform high-pressure water rinsing on the electrostatic module. Cleaning and maintenance can be performed without removing the air purification equipment from the tunnel, making it very convenient to use. The water outlet pipe rotates while spraying water, ensuring that the water spray covers the entire electrostatic module as much as possible, resulting in excellent cleaning effects. In use, the equipment can simply be hoisted onto the ceiling inside the tunnel. Multiple units can be installed at intervals along the tunnel length. This design is simpler and less costly than existing tunnel bypass air purification systems, making it more advantageous in river tunnels and facilitating the modification of existing tunnels. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present invention;

[0019] Figure 2 This is a top-view sectional view of an embodiment of the present invention;

[0020] Figure 3 for Figure 2 Enlarged view of point A;

[0021] Figure 4 This is a cross-sectional view of an embodiment of the present invention;

[0022] Figure 5 for Figure 4 Enlarged view of point B;

[0023] Figure 6 This is a partial three-dimensional schematic diagram of the cleaning module in an embodiment of the present invention;

[0024] Figure 7 This is a partial exploded perspective view of an embodiment of the present invention;

[0025] Figure 8 This is a schematic diagram of the installation of the present invention inside a tunnel according to an embodiment;

[0026] Figure 9 This is a cross-sectional view of the device installed inside a tunnel according to an embodiment of the present invention.

[0027] Figure 10 for Figure 9 Enlarged view of point A;

[0028] Figure 11 for Figure 9 Enlarged view of point B. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0030] like Figures 1-11 The image shown is a preferred embodiment of the present invention.

[0031] An air purification device for automatic cleaning of tunnel zones includes a hollow frame 1. The front end of the frame 1 has an air inlet 1a, and the rear end has an air outlet 1b. An air inlet grille 6 is provided at the air inlet 1a, and an air outlet grille 7 is provided at the air outlet 1b. The top surface of the frame 1 is provided with multiple lifting rings 10 for easy hoisting.

[0032] The frame 1 contains an electrostatic module 3 and a fan module 4. The fan module 4 is positioned near the air outlet 1b. The upper and lower ends of the fan module 4 are mounted within the frame 1 via shock-absorbing springs 41. The fan in the fan module 4 is a centrifugal fan. The fan module 4 draws in polluted air from the air inlet 1a, purifies it through the electrostatic module 3, and then discharges the purified air from the air outlet 1b. The structure of the electrostatic module 3 can refer to existing technology. In this embodiment, there are four sets of both the electrostatic module 3 and the fan module 4, arranged side-by-side. Adjacent sets of electrostatic modules 3 and adjacent sets of fan modules 4 are electrically connected together. The electrostatic module 3 and the fan module 4 can also be equipped with a mesh screen. This mesh screen allows airflow but blocks water flow. The mesh screen is composed of multiple wavy mesh panels.

[0033] The frame 1 also includes a cleaning module 2 for high-pressure water rinsing of the electrostatic module 3. The cleaning module 2 is located near the air inlet 1a, and the electrostatic module 3 is positioned between the cleaning module 2 and the fan module 4. The cleaning module 2 includes a water inlet pipe 2b, a branch water outlet pipe 2c, and a rotating head 2d. The main water inlet pipe 2b is supplied with water by a water pump 2a, which is either built into or external to the frame 1. The rotating head 2d is installed at the outlet end of the main water inlet pipe 2b via a rotating joint 2d1, which is a support component with a sealing function and can be purchased directly from the market. The main water inlet pipe 2b has multiple outlet ends, and a rotating head 2d is installed at each outlet end of the main water inlet pipe 2b. The rotating head 2d is directly or indirectly driven by the motor 2e and can rotate around its own axis. The rotating head 2d has a through-channel 2d2, which connects the main inlet pipe 2b and the branch outlet pipe 2c. The branch outlet pipe 2c is installed at the front end of the rotating head 2d via a pipe connector 2c1 and can rotate accordingly. The length direction of the branch outlet pipe 2c is perpendicular to the axis of the rotating head 2d, and the outlet end of the branch outlet pipe 2c is aligned with the corresponding electrostatic module 3. One rotating head corresponds to two branch outlet pipes 2c. The pipe connector 2c1 is a T-joint, and both branch outlet pipes 2c are installed at the front end of the rotating head 2d via the pipe connector 2c1. The outlet end of the branch outlet pipe 2c is equipped with a high-pressure nozzle 2f.

[0034] Motor 2e is connected to rotating head 2d via a gear transmission assembly. The transmission gear assembly includes a driving gear 2g, a transmission gear 2h, and an auxiliary gear 2i that mesh with each other. The driving gear 2g is mounted on the output shaft of motor 2e, and the transmission gear 2h is located on rotating head 2d. The auxiliary gear 2i is located below and meshes with the transmission gear 2h.

[0035] The frame 1 is also equipped with a wind speed sensor 11, which is located near the air inlet 1a.

[0036] The frame 1 is provided with a water receiving tank 1c, which is located below the electrostatic module 3. The side wall of the frame 1 is provided with a sewage pipe 5, which is connected to the water receiving tank 1c to discharge the sewage in the water receiving tank 1c to the outside of the frame 1.

[0037] It also includes multiple vertically arranged connecting screws 8 fixed at intervals on the frame 1. Each connecting screw 8 has an upper threaded section 81, a lower threaded section 82, and a smooth section 83. The smooth section 83 is located between the upper threaded section 81 and the lower threaded section 82. The connecting screws 8 pass through the frame 1. The upper threaded section 81 protrudes from the top surface of the frame 1 and is threadedly connected to an upper nut 9a, which is pressed against the top surface of the frame 1. The lower threaded section 82 protrudes from the bottom surface of the frame 1 and is threadedly connected to a lower nut 9b, which is pressed against the bottom surface of the frame 1. In this embodiment, there are six connecting screws 8 arranged in two rows and three columns.

[0038] Installation process: as follows Figures 8-11 As shown, the connecting screw 8 can be connected to the top screw 13 fixed to the tunnel ceiling via the connecting nut 12. During installation, the connecting nut 12 is pre-threaded onto the top screw 13 at the tunnel ceiling. Then, the air purification device is lifted to a position close to the inner ceiling wall of the tunnel, with the connecting screw 8 on the air purification device aligned with the top screw 13. The connecting nut 12 is then rotated, causing it to also be threaded onto the top screw 13. The air purification device is then suspended below the top screw 13 via the connecting nut 12, completing the assembly. Disassembly is the reverse of the installation process.

[0039] Air purification process: Fan module 4 draws in polluted air through air inlet 1a, the polluted air is purified by electrostatic module 3, and then the purified air is discharged from air outlet 1b. Electrostatic module 3 can efficiently adsorb large particulate pollutants in the air inside the tunnel.

[0040] Cleaning Process: After prolonged use, dust will accumulate in the electrostatic module 3. When the accumulation reaches a certain amount, it will affect the air purification effect and reduce the airflow. The speed sensor 11 will reduce its rotation speed. When it drops to a preset value, it will send a signal to the motor 2e, water pump 2a, electrostatic module 3, and fan module 4. The electrostatic module 3 and fan module 4 will then be de-energized and stop working. The water pump 2a will pump water into the main inlet pipe 2b, and then through the connecting channel 2d2 of the rotating head 2d, the pipe connector 2c1, and the branch water pipe 2c, finally spraying the water onto the dust-accumulated electrostatic module 3 through the high-pressure nozzle 2f at the outlet of the branch water pipe 2c. This will perform high-pressure water rinsing on the electrostatic module 3. During the rinsing process, the motor 2e drives the rotating head 2d to rotate through the transmission gear set, and the branch water pipe 2c rotates accordingly. The branch water pipe 2c sprays water while rotating, ensuring that the water spray can cover the entire electrostatic module 3 as much as possible, resulting in a better cleaning effect.

[0041] This equipment can be simply hoisted onto the ceiling inside the tunnel. Multiple units can be spaced along the tunnel's length, making it simpler and less expensive than existing tunnel bypass air purification systems. It is particularly advantageous in river tunnels and facilitates the retrofitting of existing tunnels. This purification equipment can be cleaned and maintained without being removed from the tunnel, making it extremely convenient to use.

[0042] It should be noted that in the description of this embodiment, the terms "front," "rear," "left," "right," "inner," "outer," "upper," and "lower," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are merely for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. The terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

Claims

1. An air purification device applied to automatic cleaning of tunnel belt, comprising a hollow frame (1), the front end of the frame (1) is provided with an air inlet (1a), the rear end of the frame (1) is provided with an air outlet (1b), the frame (1) is provided with an electrostatic module (3) and a fan module (4) inside, the fan module (4) is arranged close to the air outlet (1b), the fan module (4) is used to suck the contaminated air from the air inlet (1a), purify the air through the electrostatic module (3), and then discharge the purified air from the air outlet (1b); characterized in that: The frame (1) is further provided with a cleaning module (2) for high-pressure water flushing of the electrostatic module (3), the cleaning module (2) is arranged close to the air inlet (1a), the electrostatic module (3) is arranged between the cleaning module (2) and the fan module (4); the cleaning module (2) comprises a total water inlet pipe (2b), a water outlet pipe (2c) and a rotating head (2d), the total water inlet pipe (2b) is supplied with water by a water pump (2a) arranged in or outside the frame (1), the rotating head (2d) is installed at the water outlet end of the total water inlet pipe (2b) through a rotating joint (2d1), the rotating head (2d) is directly or indirectly driven by a motor (2e) to rotate around its own axis, the rotating head (2d) has a through-axis connection channel (2d2), the water outlet pipe (2c) is installed at the front end of the rotating head (2d) and can rotate with the rotating head (2d) through a pipe joint (2c1), and the length direction of the water outlet pipe (2c) is perpendicular to the axis direction of the rotating head (2d), the water outlet end of the water outlet pipe (2c) is aligned with the corresponding electrostatic module (3).

2. The air cleaning apparatus for tunnel belt automatic cleaning according to claim 1, wherein: The electrostatic module (3) and the fan module (4) are arranged in multiple groups and side by side, adjacent two groups of electrostatic modules (3) are electrically connected together, adjacent two groups of fan modules (4) are electrically connected together, the water outlet end of the total water inlet pipe (2b) has multiple water outlet ends, and each water outlet end is provided with the rotating head (2d).

3. The air cleaning apparatus for use in automatic tunnel washing according to claim 1 or 2, characterized in that: One rotating head corresponds to two water outlet pipes (2c), the pipe joint (2c1) is a three-way pipe joint, and the two water outlet pipes (2c) are installed at the front end of the rotating head (2d) through the pipe joint (2c1); the water outlet end of the water outlet pipe (2c) is provided with a high-pressure spray head (2f).

4. The air cleaning apparatus for tunnel belt automatic cleaning according to claim 1, wherein: The motor (2e) is in transmission connection with the rotating head (2d) through a gear transmission set, the transmission gear set comprises a driving gear (2g) and a transmission gear (2h) in mesh with each other, the driving gear (2g) is installed on the output shaft of the motor (2e), and the transmission gear (2h) is arranged on the rotating head (2d).

5. The air cleaning apparatus for tunnel belt automatic cleaning according to claim 1, wherein: The transmission gear set further comprises an auxiliary gear (2i), and the auxiliary gear (2i) is arranged below the transmission gear (2h) and is in mesh with the transmission gear (2h).

6. The air cleaning apparatus for tunnel belt automatic washing according to claim 1, wherein: The frame (1) is further provided with a wind speed sensor (11), and the wind speed sensor (11) is arranged adjacent to the air inlet (1a).

7. The air cleaning apparatus for tunnel belt automatic washing according to claim 1, wherein: The frame (1) is provided with a water collecting groove (1c), the water collecting groove (1c) is arranged below the electrostatic module (3), the side wall of the frame (1) is provided with a sewage pipe (5), and the sewage pipe (5) is in communication with the water collecting groove (1c) to discharge sewage in the water collecting groove (1c) out of the frame (1).

8. The air cleaning apparatus for tunnel belt automatic washing according to claim 1, wherein: The upper and lower ends of the fan module (4) are installed in the frame (1) through shock-absorbing springs (41), and the fan in the fan module (4) is a centrifugal fan; the air inlet (1a) of the frame (1) is provided with an air inlet grille (6), and the air outlet (1b) of the frame (1) is provided with an air outlet grille (7).

9. The air cleaning apparatus for tunnel belt automatic washing according to claim 1, wherein: Also include a plurality of spacing fixed on the frame (1), vertical arrangement of connecting screw rod (8), the connecting screw rod (8) has upper threaded section (81), lower threaded section (82) and light pole section (83), the light pole section (83) is located between the upper threaded section (81), lower threaded section (82), the connecting screw rod (8) is threaded on the frame (1), the upper threaded section (81) is threaded out of the top surface of the frame (1) and is threaded with upper nut (9a), the upper nut (9a) is pressed on the top surface of the frame (1), the lower threaded section (82) is threaded out of the bottom surface of the frame (1) and is threaded with lower nut (9b), the lower nut (9b) is pressed on the bottom surface of the frame (1).

10. The air cleaning apparatus for use in automatic tunnel washing according to claim 9, characterized in that: The connecting screw rod (8) has six, two rows of three column arrangement; the top surface of the frame (1) is provided with a plurality of lifting rings (10) for convenient lifting.

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