Air purification equipment with automatic cleaning function applied to tunnel

Abstract

The utility model relates to air purification equipment with an automatic cleaning function applied to a tunnel, which 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] The utility model belongs to the technical field of air purification equipment, and in particular relates to an air purification equipment used for automatic cleaning of tunnel belts. Background Art

[0002] With the continuous development of the domestic economy, the task of transportation construction is becoming increasingly arduous. Highway construction has expanded from surface to diversified development above and below ground. Currently, with the development of domestic shield equipment, the construction of tunnel highways has developed rapidly. Tunnel highway construction distances are becoming longer and longer, which puts higher demands on the air quality inside the tunnel. How to reliably and effectively solve the problem of air cleanliness in such a closed space is of paramount importance. The key indicator of cleanliness is particulate matter, which mainly comes from the following sources: ① from vehicles entering the tunnel from outside; ② from the tunnel walls and road surface; ③ from the friction of automobile tires; ④ from the interior of the vehicle (including cigarettes and goods); and ⑤ from automobile exhaust.

[0003] The tunnel bypass air purification system that is currently widely used is a combination of an axial flow fan and an air purifier, which uses the axial flow fan to provide operating power to the air purification system; the combination achieves the air purification effect, such as the Chinese invention patent application "A Tunnel Air Purification System" with application number ZL202110762243.9 (publication number CN113577915A) discloses such a bypass air purification system, including a bypass channel, a tunnel air inlet located at one end of the bypass channel, a tunnel air outlet located at the other end of the bypass channel, an electrostatic precipitator located in the bypass channel, a denitrification equipment and a silencer. However, the tunnel bypass air purification system equipped with an axial flow fan requires a large installation space, high civil engineering and equipment investment, high operating and maintenance costs, high energy consumption, and poor economic benefits; the tunnel bypass air purification system equipped with an axial flow fan is only suitable for new projects, not suitable for the modification of the air purification system of an already operating tunnel, and even less suitable for use in river tunnels (it is inconvenient to set up a bypass purification channel next to the main tunnel).

[0004] Therefore, it is a technical problem that those skilled in the art need to solve urgently to invent an air purification device that is suitable for use in existing tunnels, is easy to assemble, has good air purification effect, is low in cost, and is easy to clean. Utility Model Content

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

[0006] The technical solution adopted by the present invention to solve the above technical problems is: an air purification device for automatic cleaning of tunnel belts, comprising a hollow frame, an air inlet being provided at the front end of the frame, an air outlet being provided at the rear end of the frame, an electrostatic module and a fan module being provided in the frame, the fan module being arranged close to the air outlet, the fan module being used to draw in polluted air from the air inlet, purifying it through the electrostatic module, and then discharging the purified air from the air outlet; the characteristic is that a cleaning module for high-pressure water washing of the electrostatic module is further provided in the frame, the cleaning module being close to the air inlet The electrostatic module is arranged 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 external to the frame. The rotating head is installed at the water outlet end of the main water inlet pipe through a rotating joint. The rotating head is directly or indirectly driven by a motor to rotate around its own axis. The rotating head has a connecting channel with an axis passing through it. The branch water outlet pipe is installed at the front end of the rotating head through a pipe joint and can rotate therewith. The length direction of the branch water outlet pipe is perpendicular to the axial direction of the rotating head, and the water outlet end of the branch water outlet pipe is aligned with the corresponding electrostatic module.

[0007] In order to improve the air purification efficiency of the air purification equipment, the above-mentioned electrostatic modules and fan modules are arranged in multiple groups and are arranged in parallel on the left and right. The two adjacent groups of electrostatic modules are electrically connected to each other, and the two adjacent groups of fan modules are electrically connected to each other. There are multiple water outlet ends of the main water inlet pipe, and each of the water outlet ends of the main water inlet pipe is equipped with a rotating head.

[0008] As an improvement, one rotating head corresponds to two branch water pipes, and the pipe joint is a three-way pipe joint. The pipe joint through which the two branch water pipes pass is installed at the front end of the rotating head; the water outlet end of the branch water pipe is equipped with a high-pressure nozzle. The branch water pipes are arranged vertically and there are two of them. Each branch water pipe can have multiple water outlet ends. This allows the rotating head to rotate faster and spray water to the electrostatic module over a wider range, achieving a better cleaning effect. The setting of the high-pressure nozzle can increase the pressure of the sprayed water, further improving the cleaning effect.

[0009] To smoothly drive the rotating head around its own axis, the motor is connected to the rotating head via a gear transmission system. This transmission gear system includes a meshing driving gear and a transmission gear. The driving gear is mounted on the output shaft of the motor, and the transmission gear is mounted on the rotating head. The advantages of a gear transmission are high transmission accuracy, smooth and reliable transmission, and the ability to achieve a large transmission ratio. Of course, other transmission methods, such as belt drives, are also possible.

[0010] As a further improvement, the transmission gear set further includes an auxiliary gear, which is arranged below the transmission gear and meshes with the transmission gear. The auxiliary gear plays an auxiliary supporting role for the transmission gear, ensuring that the transmission of the transmission gear set is smooth and reliable.

[0011] As a further improvement, a wind speed sensor is also provided within the frame, located adjacent to the air inlet. The provision of the wind speed sensor provides a possibility for automatic cleaning. The wind speed sensor can sense the air volume passing through. When the electrostatic module is used for a period of time, dust will accumulate. When the accumulation reaches a certain amount, it will affect the air purification effect and reduce the air volume passing through. The wind speed sensor speed will decrease. When it drops to a preset value, it can send a signal to the motor and water pump to control them to perform a cleaning operation. During the cleaning operation, the electrostatic module and the fan module are powered off.

[0012] The electrostatic module, when used for a long time, absorbs a large amount of dust. After flushing, the dust accumulates into mud. To drain the accumulated mud out of the frame, a further improvement is to provide a water trough within the frame. The trough is located below the electrostatic module, and a drainage pipe is provided on the side wall of the frame. The drainage pipe is connected to the water trough to drain the sewage in the trough out of the frame. The accumulated muddy water flows into the trough and is finally discharged out of the frame through the drainage pipe.

[0013] The fan module's vibration is reduced. The upper and lower ends of the fan module are mounted within the frame via shock-absorbing springs. The fan in the module is a centrifugal fan. The frame's air inlet is equipped with an air intake grille, and the frame's air outlet is equipped with an air outlet grille. These grilles prevent foreign matter from entering the frame and damaging its internal components.

[0014] In order to facilitate the installation of the air purification equipment in the tunnel, further improvements are made to include multiple connecting screws fixed at intervals on the frame and arranged vertically. The connecting screw has an upper threaded section, a lower threaded section and a bare rod section. The bare rod section is located between the upper threaded section and the lower threaded section. The connecting screw is passed through the frame. The upper threaded section passes through the top surface of the frame and is threadedly connected to an upper nut. The upper nut is pressed against the top surface of the frame. The lower threaded section passes through the bottom surface of the frame and is threadedly connected to a lower nut. The lower nut is pressed against the bottom surface of the frame.

[0015] The connecting screw can be connected to the top screw fixed to the top of the tunnel via a connecting nut. During installation, pre-thread the connecting nut onto the top screw at the top of the tunnel. Then, use a lifting device to lift the air purification device to a position close to the inner top wall of the tunnel, aligning the connecting screw on the air purification device with the top screw. Turn the upper nut so that it also threads onto the top screw. Then, hoist the air purification device below the top screw via the upper nut, completing the assembly. Disassembly and assembly are the reverse of the installation process. Turning the upper nut also adjusts the position to ensure a flat installation.

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

[0017] Compared with the existing technology, the advantages of the present invention are as follows: the purification equipment includes a cleaning module, an electrostatic module, and a fan module arranged in a frame. The fan module draws in polluted air from the air inlet, purifies it through the electrostatic module, and then discharges the purified air from the air outlet. The electrostatic module can efficiently absorb large particles of pollutants in the tunnel. After long-term use, the cleaning module is controlled to work and the electrostatic module is flushed with high-pressure water. The air purification equipment can be cleaned and maintained without removing it from the tunnel, which is very convenient to use. The outlet pipe sprays water while rotating to ensure that the water spray can cover the entire electrostatic module as much as possible, and the cleaning effect is excellent. When in use, it is only necessary to hoist the equipment on the top of the tunnel. According to the length of the tunnel, multiple units of the equipment can be set at intervals along the length direction. Compared with the existing tunnel bypass air purification system, the structure is simpler and the cost is lower. It can better play its advantages in river tunnels and is also convenient for the transformation of existing tunnels. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of an embodiment of the utility model;

[0019] Figure 2 This is a cross-sectional view of an embodiment of the present utility model when viewed from above;

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

[0021] Figure 4 It is a cross-sectional view of an embodiment of the utility model;

[0022] Figure 5 for Figure 4 A magnified view of point A;

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

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

[0025] Figure 8 This is a schematic diagram of an embodiment of the utility model installed in a tunnel;

[0026] Figure 9 This is a cross-sectional view of an embodiment of the utility model installed in a tunnel

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

[0028] Figure 11 for Figure 9 Enlarged view of point B. DETAILED DESCRIPTION

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

[0030] like Figures 1 to 11 Shown is a preferred embodiment of the present utility model.

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

[0032] An electrostatic module 3 and a fan module 4 are provided in the frame 1. The fan module 4 is arranged near the air outlet 1b. The upper and lower ends of the fan module 4 are mounted in the frame 1 via shock-absorbing springs 41. The fan in the fan module 4 is a centrifugal fan. The fan module 4 is used to draw polluted air from the air inlet 1a, purify it through the electrostatic module 3, and then discharge the purified air from the air outlet 1b. The structure of the electrostatic module 3 can refer to the prior art. In this embodiment, there are four groups of electrostatic modules 3 and fan modules 4, which are arranged side by side on the left and right. Two adjacent groups of electrostatic modules 3 are electrically connected to each other, and two adjacent groups of fan modules 4 are electrically connected to each other. The electrostatic modules 3 and fan modules 4 can also be provided with a partition net, which allows air to pass through but can block water flow. The partition net is composed of multiple wavy mesh sheets.

[0033] The frame 1 also houses a cleaning module 2 for high-pressure water flushing of the electrostatic module 3. This module is positioned near the air inlet 1a and between the electrostatic module 3 and the fan module 4. The cleaning module 2 includes an inlet pipe 2b, a branch outlet pipe 2c, and a rotating head 2d. The main inlet pipe 2b is supplied with water by a water pump 2a internal to or external to the frame 1. The rotating head 2d is mounted at the outlet of the main inlet pipe 2b via a rotating joint 2d1. The rotating joint 2d1 is a commercially available sealing component. The main inlet pipe 2b has multiple outlets, each of which is equipped with a rotating head 2d. The rotating head 2d is driven directly or indirectly by a motor 2e to rotate about its axis. A connecting channel 2d2 extends through the rotating head 2d, connecting the main water inlet pipe 2b with the branch water outlet pipe 2c. The branch water outlet pipe 2c is mounted at the front end of the rotating head 2d via a pipe joint 2c1, allowing it to rotate with the rotating head 2d. The length of the branch water outlet pipe 2c is perpendicular to the axis of the rotating head 2d, and the outlet end of the branch water outlet pipe 2c is aligned with the corresponding electrostatic module 3. Each rotating head corresponds to two branch water outlet pipes 2c. The pipe joint 2c1 is a three-way pipe joint, and both branch water outlet pipes 2c are mounted at the front end of the rotating head 2d via the pipe joint 2c1. A high-pressure nozzle 2f is installed at the outlet end of each branch water outlet pipe 2c.

[0034] Motor 2e is connected to rotating head 2d via a gear train. The gear train includes a meshing driving gear 2g, a transmission gear 2h, and an auxiliary gear 2i. Driving gear 2g is mounted on the output shaft of motor 2e, while transmission gear 2h is mounted on rotating head 2d. Auxiliary gear 2i is positioned below and meshes with transmission gear 2h.

[0035] A wind speed sensor 11 is also provided in the frame 1 , and is disposed adjacent to the air inlet 1 a .

[0036] A water receiving trough 1c is provided in the frame 1 , and the water receiving trough 1c is provided below the electrostatic module 3 . A sewage pipe 5 is provided on the side wall of the frame 1 , and the sewage pipe 5 is connected to the water receiving trough 1c to discharge the sewage in the water receiving trough 1c out of the frame 1 .

[0037] The frame 1 further includes a plurality of vertically arranged connecting screws 8 fixed at intervals to the frame 1. The connecting screws 8 have an upper threaded section 81, a lower threaded section 82, and a polished section 83. The polished section 83 is located between the upper threaded section 81 and the lower threaded section 82. The connecting screws 8 are inserted through the frame 1. The upper threaded section 81 extends through 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 extends through 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: Figures 8-11 As shown, the connecting screw 8 can be connected to the top screw 13 fixed on the top of the tunnel through the connecting nut 12. During installation, the connecting nut 12 is pre-threaded onto the top screw 13 on the top of the tunnel. Then, the air purification device is lifted to a position close to the inner top wall of the tunnel using a lifting device, and the connecting screw 8 on the air purification device is aligned with the top screw 13. The connecting nut 12 is then rotated so that the connecting nut 12 is also threaded onto the top screw 13. The air purification device is then suspended below the top screw 13 through the connecting nut 12 to complete the assembly. When disassembling, the process is the opposite of the installation process.

[0039] Air purification process: The fan module 4 draws in polluted air from the air inlet 1a, the polluted air is purified by the electrostatic module 3, and then the purified air is discharged from the air outlet 1b. The electrostatic module 3 can efficiently absorb large particle pollutants in the air in the tunnel.

[0040] Cleaning process: After long-term use, the electrostatic module 3 will accumulate dust. When the accumulation reaches a certain amount, it will affect the air purification effect and reduce the air volume passing through. The speed of the wind speed sensor 11 will decrease. When it decreases to a preset value, it can 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 be powered off and stop working. The water pump 2a will pump water into the main water inlet pipe 2b, and then through the connecting channel 2d2 of the rotating head 2d, the pipe joint 2c1, and the branch water pipe 2c, and finally through the high-pressure nozzle 2f at the water outlet end of the branch water pipe 2c to spray the electrostatic module 3 where dust has accumulated, and perform high-pressure water flushing on the electrostatic module 3. During the flushing 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 rotates and sprays water to ensure that the water spray can cover the entire electrostatic module 3 as much as possible, and the cleaning effect is better.

[0041] The device can simply be hoisted onto the tunnel ceiling. Multiple units can be spaced along the length of the tunnel, depending on the tunnel's length. Compared to existing tunnel bypass air purification systems, this system offers a simpler structure and lower costs, making it more suitable for river tunnels and easier to retrofit. This purification system can be cleaned and maintained without removing the air purification device from the tunnel, making it extremely convenient to use.

[0042] It should be noted that in the description of this embodiment, the terms "front, back", "left, right", "inside, outside", "upper, lower" and the like indicating directions or positional relationships are all based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention. The terms "install", "connect", and "connected" should be understood in a broad sense. For example, they can be fixed connections, detachable connections, or integral connections; they can be directly connected, or indirectly connected through an intermediate medium, or they can be internal connections between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. An air purification device for automatic cleaning of tunnel belts, comprising a hollow frame (1), wherein the front end of the frame (1) is provided with an air inlet (1a), and the rear end of the frame (1) is provided with an air outlet (1b), wherein an electrostatic module (3) and a fan module (4) are provided in the frame (1), wherein the fan module (4) is arranged near the air outlet (1b), and the fan module (4) is used to draw polluted 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 performing high-pressure water flushing on the electrostatic module (3); the cleaning module (2) is arranged near 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 main 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) internally or externally disposed in the frame (1); the rotating head (2d) is connected to the rotating joint (2d) to supply water; 1) is installed at the water outlet end of the main water inlet pipe (2b), the rotating head (2d) is driven directly or indirectly by a motor (2e) to rotate around its own axis, the rotating head (2d) has a connecting channel (2d2) with an axis passing therethrough, the branch water outlet pipe (2c) is installed at the front end of the rotating head (2d) through a pipe joint (2c1) and can rotate therewith, and the length direction of the branch water outlet pipe (2c) is perpendicular to the axial direction of the rotating head (2d), and the water outlet end of the branch water outlet pipe (2c) is aligned with the corresponding electrostatic module (3).

2. The air purification device for automatic cleaning of tunnels according to claim 1 is characterized by: The electrostatic modules (3) and the fan modules (4) are provided in multiple groups and are arranged in parallel on the left and right sides. Two adjacent groups of electrostatic modules (3) are electrically connected to each other, and two adjacent groups of fan modules (4) are electrically connected to each other. The main water inlet pipe (2b) has multiple water outlet ends, and each water outlet end of the main water inlet pipe (2b) is equipped with a rotating head (2d).

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

4. The air purification device for automatic cleaning of tunnels according to claim 1 is characterized by: The motor (2e) is connected to the rotating head (2d) through a gear transmission group, wherein the gear transmission group comprises a driving gear (2g) and a transmission gear (2h) meshing with each other, the driving gear (2g) being mounted on the output shaft of the motor (2e), and the transmission gear (2h) being arranged on the rotating head (2d).

5. The air purification device for automatic cleaning of tunnels according to claim 4 is characterized by: The transmission gear set further comprises an auxiliary gear (2i), which is arranged below the transmission gear (2h) and meshes with the transmission gear (2h).

6. The air purification device for automatic cleaning of tunnels according to claim 1 is characterized by: A wind speed sensor (11) is also provided in the frame (1), and the wind speed sensor (11) is arranged adjacent to the air inlet (1a).

7. The air purification device for automatic cleaning of tunnels according to claim 1 is characterized by: A water receiving trough (1c) is provided in the frame (1), and the water receiving trough (1c) is provided below the electrostatic module (3). A sewage pipe (5) is provided on the side wall of the frame (1), and the sewage pipe (5) is connected to the water receiving trough (1c) to discharge sewage in the water receiving trough (1c) out of the frame (1).

8. The air purification device for automatic cleaning of tunnels according to claim 1 is characterized by: The upper and lower ends of the fan module (4) are mounted in the frame (1) via shock-absorbing springs (41); the fan in the fan module (4) is a centrifugal fan; an air inlet grille (6) is provided at the air inlet (1a) of the frame (1), and an air outlet grille (7) is provided at the air outlet (1b) of the frame (1).

9. The air purification device for automatic cleaning of tunnels according to claim 1, characterized in that: The invention also includes a plurality of connecting screws (8) fixed at intervals on the frame (1) and arranged vertically, wherein the connecting screw (8) has an upper threaded section (81), a lower threaded section (82) and a light rod section (83), wherein the light rod section (83) is located between the upper threaded section (81) and the lower threaded section (82), and the connecting screw (8) is passed through the frame (1), the upper threaded section (81) passes through the top surface of the frame (1) and is threadedly connected to an upper nut (9a), wherein the upper nut (9a) is pressed against the top surface of the frame (1), and the lower threaded section (82) passes through the bottom surface of the frame (1) and is threadedly connected to a lower nut (9b), wherein the lower nut (9b) is pressed against the bottom surface of the frame (1).

10. The air purification device for automatic cleaning of tunnels according to claim 9, characterized in that: There are six connecting screw rods (8) arranged in two rows and three columns; the top surface of the frame (1) is provided with a plurality of lifting rings (10) for easy lifting.

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