Dry dedusting evaporative cooling tower inner wall dust cleaning device

Abstract

The application discloses a dry dedusting evaporation cooling tower inner wall dust cleaning device, which comprises an observation hole, an electric chain, a circular chain, a pneumatic motor, a runner, flexible telescopic dust cleaning arms, a rubber tube and an upper air supply device, the observation hole is installed right above the evaporation cooling tower, the electric chain is fixed right above the observation hole, the upper end of the circular chain is connected with the electric chain, the lower end of the circular chain is connected with the pneumatic motor after penetrating into the evaporation cooling tower from the observation hole, the pneumatic motor is connected with the runner through a speed reducer, a plurality of flexible telescopic dust cleaning arms are fixed around the runner along the radial direction and correspond to the hard-set dust on the inner wall of the evaporation cooling tower, and the two ends of the rubber tube are connected with the pneumatic motor and the upper air supply device respectively. The flexible telescopic dust cleaning arms are driven to rotate by the suspended pneumatic motor, the hard-set dust on the inner wall of the evaporation cooling tower is removed by the flexible telescopic dust cleaning arms, the hard-set dust cleaning difficulty is greatly reduced, the high-altitude operation in a limited space can be avoided, the working efficiency is improved, and the safety hidden danger is eliminated.

Description

Technical Field

[0001] This invention relates to a mechanical cleaning device for ash buildup on the inner wall of a dry dust removal evaporative cooling tower in converter steelmaking, belonging to the field of metallurgical equipment technology. Background Technology

[0002] With the introduction of the concept of high-quality development, environmental protection standards are becoming increasingly stringent. As the domestic steel industry transforms and upgrades, the application of dry dust removal is becoming more and more widespread. With the popularization and promotion of dry dust removal, the cleaning of evaporative cooling towers for dry dust removal has become a problem to be solved in the industry.

[0003] The dry dust removal evaporative cooling tower is a large cylinder with a diameter of about 6 meters and a height of about 30 meters. After about one furnace cycle, a thick layer of hardened ash will form on the inner wall of the evaporative cooling tower. This hardened ash is insoluble in water. Cleaning the hardened ash is a high-altitude operation in a confined space. Traditional cleaning methods require scaffolding. All materials need to enter and exit through a manhole with a diameter of 600 mm, which makes the operation extremely difficult and poses great safety hazards, especially in the hot summer. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a dry dust removal device for the inner wall of an evaporative cooling tower, thereby reducing the difficulty of cleaning ash buildup on the cooling tower plates and eliminating safety hazards.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A dry dust removal device for cleaning the inner wall of an evaporative cooling tower includes an observation hole, an electric chain, a circular chain, a pneumatic motor, a rotary wheel, flexible telescopic cleaning arms, a hose, and an upper air supply device. The observation hole is installed directly above the evaporative cooling tower, and the electric chain is fixed directly above the observation hole. The upper end of the circular chain is connected to the electric chain, and the lower end passes through the observation hole into the evaporative cooling tower and is connected to the pneumatic motor. The output shaft of the pneumatic motor is connected to the rotary wheel below it through a reducer. Multiple flexible telescopic cleaning arms are fixed radially around the rotary wheel and correspond to the sludge deposits on the inner wall of the evaporative cooling tower. The two ends of the hose are connected to the pneumatic motor and the upper air supply device, respectively.

[0006] The aforementioned dry dust removal evaporative cooling tower inner wall cleaning device includes a rotating device and a rotating pin plate on the circular chain. The rotating device includes a base plate and two semi-circular tubes. The base plate is horizontally fixed on the observation hole. The center of the base plate has a central hole corresponding to the circular chain. The two semi-circular tubes are symmetrically fixed on the upper two sides of the central hole with their concave surfaces facing each other. A rotating gap is formed between the vertical edges of the two semi-circular tubes. The rotating pin plate passes through one link of the circular chain and its two ends are slidably installed in the rotating gap.

[0007] The aforementioned dry dust removal evaporative cooling tower inner wall cleaning device has a base plate made of two semi-circular plates spliced ​​together, with a semi-circular pipe fixed on each semi-circular plate.

[0008] The aforementioned dry dust removal evaporative cooling tower inner wall cleaning device has a counterweight at the bottom of the rotor. The counterweight is connected to the rotor by a double-ended bolt and a flange nut. The double-ended bolt passes vertically through the center hole of the counterweight. The upper end of the double-ended bolt is connected to the threaded hole at the center of the bottom of the rotor by a thread. The lower end of the double-ended bolt is screwed into the flange nut.

[0009] The aforementioned dry dust removal evaporative cooling tower inner wall cleaning device includes a hollow double-ended bolt. Each flexible telescopic cleaning arm comprises a piston cylinder, a piston rod, and a flexible wire rope cutter. The piston rod is slidably inserted into the piston cylinder. One end of the piston cylinder is connected to a rotating wheel via a thread and communicates with the inner cavity of the double-ended bolt through an air distribution hole inside the rotating wheel. One end of the flexible wire rope cutter is inserted into the other end of the piston cylinder and fixedly connected to the piston rod. The other end of the flexible wire rope cutter is opposite to the slab-like ash on the inner wall of the evaporative cooling tower. A metal hose is provided below the counterweight. The upper end of the metal hose is connected to the lower end of the double-ended bolt via a lower rotary joint. The lower end of the metal hose extends out from the bottom inspection port of the evaporative cooling tower and is connected to the lower air supply device.

[0010] The above-mentioned dry dust removal evaporative cooling tower inner wall cleaning device includes an upper air supply device comprising an upper regulating valve, an upper shut-off valve, and an upper connecting pipe. The upper end of the hose is wound around a spring drum and connected to one end of the upper connecting pipe through an upper rotary joint. The other end of the upper connecting pipe is connected to a high-pressure air source in sequence through the upper shut-off valve and the upper regulating valve. A pressure sensor is installed on the upper connecting pipe.

[0011] The aforementioned dry dust removal evaporative cooling tower inner wall cleaning device includes a lower air supply device comprising a lower shut-off valve, a lower regulating valve, and a lower connecting pipe. One end of the lower connecting pipe is connected to the lower end of a metal hose, and the other end is connected to a high-pressure air source in sequence through the lower shut-off valve and the lower regulating valve. A pressure transmitter is installed on the lower connecting pipe.

[0012] The aforementioned dry dust removal evaporative cooling tower inner wall cleaning device also includes a feed speed control unit. The feed speed control unit includes an electrical control box, a PLC controller, and a frequency converter. The PLC controller and the frequency converter are installed inside the electrical control box. The control terminal of the upper regulating valve is connected to the PLC controller. The control signal input terminal of the frequency converter is connected to the PLC controller. The output terminal of the frequency converter is connected to the electric chain.

[0013] The aforementioned dry dust removal evaporative cooling tower inner wall cleaning device also includes a lighting lamp and a camera, which are respectively installed in the mounting holes on both sides of the top of the evaporative cooling tower. The camera is connected to a laptop computer via a communication cable.

[0014] The aforementioned dry dust removal evaporative cooling tower inner wall cleaning device also includes a ring chain to be connected with the same structure as the ring chain, and the ring chain to be connected is connected between the ring chain and the electric chain.

[0015] This invention utilizes a pneumatic motor suspended in an evaporative cooling tower to drive a flexible telescopic cleaning arm to rotate. The flexible telescopic cleaning arm removes the ash buildup on the inner wall of the evaporative cooling tower, greatly reducing the difficulty of cleaning the ash buildup in the cooling tower. It can avoid cleaning personnel working at height in a confined space, thereby improving work efficiency and eliminating safety hazards. Attached Figure Description

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0017] Figure 1 This is a schematic diagram of the dry dust removal evaporative cooling tower inner wall cleaning device of the present invention; Figure 2 for Figure 1 A magnified view of a portion of the view; Figure 3 A schematic diagram of the installation of the flexible telescopic dust removal arm; Figure 4 A schematic diagram of the flexible telescopic dust removal arm; Figure 5 This is a schematic diagram of the structure of the control device, in which Figure 5 (a) is the front view; 5(b) is the left view; 5(c) is the top view; Figure 6 This is the state of the flexible telescopic cleaning arm before the pneumatic motor starts; Figure 7 A schematic diagram of a flexible telescopic dust removal arm extending to "eat the blade" and perform lateral feed cutting for low-speed start-up of the pneumatic motor; Figure 8 A schematic diagram of the initial state of the lateral feed cutting of the flexible telescopic dust removal arm. Figure 9 This diagram illustrates the start of longitudinal feed cutting after the lateral feed of the flexible telescopic dust removal arm has ended. Figure 10 This is a schematic diagram of the mid-stage longitudinal feed cutting of the flexible telescopic dust removal arm.

[0018] The following are the labels in the diagram: 1. Flexible telescopic dust removal arm; 2. Air distribution port; 3. Rotor brake; 4. Pneumatic motor; 5. U-shaped lifting ring; 6. Connecting lifting ring; 7. Reducer; 8. Rotary wheel; 9. Flange nut; 10. Metal hose; 11. Lower rotary joint; 12. Double-ended bolt; 13. Counterweight; 14. Lighting light; 15. Evaporative cooling tower; 16. Condensed ash; 17. Rubber hose; 18. Circular link chain; 19. Observation hole; 20. Rotor brake pin plate; 21. Mounting hole; 22. Circular link chain to be connected; 23. 24. Mainspring drum, 25. Upper rotary joint, 26. Electric chain, 27. I-beam, 28. Upper regulating valve, 29. Upper shut-off valve, 30. Upper connecting pipe, 31. Pressure sensor, 32. Electrical control cabinet, 33. PLC controller, 34. Lower shut-off valve, 35. Lower regulating valve, 36. Lower connecting pipe, 37. Pressure transmitter, 38. Scraper conveyor, 39. Camera, 40. Maintenance platform, 41. Maintenance manhole, 42. Laptop computer, 43. Frequency converter; 1-1. Piston cylinder; 1-2. Piston rod; 1-3. Wire rope flexible cutter; 1-4. Thread; 3-1. Base plate; 3-2. Semicircular tube; 3-3. Center hole; 3-4. Bolt hole; 3-5. Rotation gap. Detailed Implementation

[0019] This invention addresses the problems existing in the prior art by providing a dry dust removal evaporative cooling tower inner wall cleaning device, realizing the mechanized cleaning of ash buildup on the inner wall of the dry dust removal evaporative cooling tower in converter steelmaking.

[0020] See Figures 1-5 The dust removal device of the present invention mainly includes a flexible telescopic dust removal arm 1, a rotary actuator 3, a pneumatic motor 4, a U-shaped lifting ring 5, a connecting lifting ring 6, a reducer 7, a rotating wheel 8, a flange nut 9, a metal hose 10, a lower rotary joint 11, a double-ended bolt 12, a counterweight 13, a lighting lamp 14, an evaporative cooling tower 15, sludge 16, a rubber hose 17, a circular link chain 18, an observation hole 19, a rotary actuator pin plate 20, a spring drum 24, an upper rotary joint 25, an electric chain 26, an I-beam 27, an upper regulating valve 28, an upper shut-off valve 29, an upper connecting pipe 30, a pressure sensor 31, an electrical control cabinet 32, a PLC controller 33, a lower shut-off valve 34, a lower regulating valve 35, a lower connecting pipe 36, a pressure transmitter 37, a scraper conveyor 38, a camera 39, a maintenance platform 40, a laptop computer 42, a frequency converter 43, and a circular link chain 22 to be connected.

[0021] An observation hole 19, coaxial with the evaporative cooling tower 15, is provided on the end section of the flue 23 at the top of the evaporative cooling tower 15. A maintenance platform 40, fixedly connected to the evaporative cooling tower 15, is provided on one side of the observation hole 19. A rotation control device 3 is installed on the observation hole 19. The rotation control device 3 includes a base plate 3-1 and two semi-circular tubes 3-2. The center of the base plate 3-1 has a central hole 3-3 through which the circular chain 18 can pass freely. Bolt holes 3-4 are provided at the edge, which can be fixed to the observation hole 19 by bolts. The two semi-circular tubes 3-2 are symmetrically fixed on both sides of the central hole 3-3 with their concave surfaces facing each other. A rotation control gap 3-5 is formed between the vertical edges of the two semi-circular tubes 3-2. The rotation control pin plate 20 can slide up and down along the rotation control gap 3-5. The function of the two semi-circular tubes 3-2 is to restrict the rotation of the rotation control pin plate 20. To facilitate installation and adjustment of the width of the control gap 3-5, the base plate 3-1 is composed of two semi-circular plates spliced ​​together, with a semi-circular tube 3-2 fixed to each semi-circular plate. After the base plate 3-1 is fixed with bolts, a control gap 3-5 with a width of 40mm is formed between the vertical sides of the two semi-circular tubes 3-2. The circular chain 18 passes through the center hole 3-3 of the base plate 3-1. The control pin plate 20 is a right-angled trapezoidal plate, passing through one link of the circular chain 18, with both ends of the control pin plate 20 clamped in the control gap 3-5 between the vertical sides of the two semi-circular tubes 3-2. The I-beam 27 is welded and fixed below the upper platform. The upper end of the circular chain 18 is connected to the electric chain 26 fixed to the lower part of the I-beam 27. The lower end of the circular chain 18 is located inside the evaporative cooling tower 15 and is connected to the housing of the pneumatic motor 4 in sequence through the U-shaped lifting ring 5 and the connecting lifting ring 6. The reducer 7... Located below the pneumatic motor 4 and with their housings fixed together, the input shaft of the reducer 7 is connected to the output shaft of the pneumatic motor 4, and the output shaft is coaxially connected to the wheel 8. The bottom of the wheel 8 is provided with a counterweight 13, and a double-ended bolt 12 passes vertically through the center hole of the counterweight 13. The upper end of the double-ended bolt 12 is connected to the threaded hole at the center of the bottom of the wheel 8 through a thread, and the lower end of the double-ended bolt 12 is screwed into a flange nut 9. The counterweight 13 is fixed to the bottom of the wheel 8 by the double-ended bolt 12 and the flange nut 9. Multiple radial flexible telescopic dust removal arms 1 are installed around the wheel 8. When the pneumatic motor 4 drives the rotary wheel 8 and the flexible telescopic cleaning arm 1 to rotate via the reducer 7, the flexible telescopic cleaning arm 1 can scrape off the plated ash 16 on the inner wall of the evaporative cooling tower 15. When the electric chain 26 causes the circular chain 18 to move downward, the flexible telescopic cleaning arm 1 scrapes off the plated ash 16 from top to bottom. At the same time, the rotation control pin 20 moves downward along the rotation control gap 3-5 to prevent the reaction force generated by cutting the plated ash 16 from causing the circular chain 18 to rotate. When the rotation control pin 20 contacts the bottom plate 3-1, the circular chain 22 to be connected can be inserted between the circular chain 18 and the electric chain 26. Then, the rotation control pin 20 is pulled out from the link of the circular chain 18 and inserted into the link of the circular chain 22 to be connected.

[0022] The pneumatic motor 4, reducer 7, rotor 8, counterweight 13 and flexible telescopic cleaning arm 1 constitute a rotary cleaning device, which is vertically suspended in the evaporative cooling tower 15 by I-beam 27, electric chain 26, circular chain 18, U-shaped lifting ring 5 and connecting lifting ring 6.

[0023] Each flexible telescopic dust removal arm 1 includes a piston cylinder 1-1, a piston rod 1-2, and a steel wire rope flexible cutter 1-3. The piston rod 1-2 is slidably inserted into the piston cylinder 1-1 and can slide axially along the inner wall of the piston cylinder 1-1. One end of the piston cylinder 1-1 is connected to the rotating wheel 8 by a thread and communicates with the inner cavity of the double-ended bolt 12 through the air distribution hole 2 inside the rotating wheel 8. One end of the steel wire rope flexible cutter 1-3 is inserted into the other end of the piston cylinder 1-1 and is fixedly connected to the piston rod 1-2. The other end of the steel wire rope flexible cutter 1-3 is opposite to the slab ash 16 on the inner wall of the evaporative cooling tower 15. The upper end of the metal hose 10 is connected to the lower end of the double-ended bolt 12 through the lower rotary joint 11. The lower end of the metal hose 10 passes through the bottom inspection port of the evaporative cooling tower 15 and is connected to the lower air supply device. The lower gas supply device includes a lower shut-off valve 34, a lower regulating valve 35, a lower connecting pipe 36, and a pressure transmitter 37. One end of the lower connecting pipe 36 is connected to the lower end of the metal hose 10, and the other end is connected to a high-pressure gas source through the lower shut-off valve 34 and the lower regulating valve 35 in sequence. The pressure transmitter 37 is installed on the lower connecting pipe 36. The lower regulating valve 35 controls the position of the piston rod 1-2 in the piston cylinder 1-1, thereby controlling the extension length of the flexible wire rope cutter 1-3, so that the rotary dust removal device can adapt to evaporative cooling towers 15 of different diameters.

[0024] There are 12 flexible telescopic cleaning arms 1, evenly distributed on the circumference of the rotating wheel 8, making the rotating cleaning device resemble a helicopter propeller. The rotating wheel 8 has 12 air distribution holes 2, each corresponding to one flexible telescopic cleaning arm 1.

[0025] The lower end of the hose 17 is connected to the pneumatic motor 4, and the upper end slides through the observation hole 19 and is wound around the spring drum 24 and connected to the upper air supply device through the upper rotary joint 25. The upper air supply device includes an upper regulating valve 28, an upper shut-off valve 29, an upper connecting pipe 30 and a pressure sensor 31. One end of the upper connecting pipe 30 is connected to the hose 17 through the upper rotary joint 25, and the other end of the upper connecting pipe 30 is connected to the high-pressure air source through the upper shut-off valve 29 and the upper regulating valve 28 in sequence. The pressure sensor 31 is installed on the upper connecting pipe 30.

[0026] The electrical control box 32, PLC controller 33, and frequency converter 43 constitute the feed speed control unit. The PLC controller 33 and frequency converter 43 are installed inside the electrical control box 32. The control terminal of the upper regulating valve 28 is connected to the PLC controller 33, the control signal input terminal of the frequency converter 43 is connected to the PLC controller 33, and the output terminal of the frequency converter 43 is connected to the electric chain 26. The PLC controller 33 controls the rotation speed of the pneumatic motor 4 through the upper regulating valve 28 and controls the descent or ascent speed of the electric chain 26 through the frequency converter 43. The opening degree of the upper regulating valve 28 and the frequency of the frequency converter 43 can be selected according to the thickness of the sludge 16 to control the rotation speed and feed speed of the rotary cleaning device.

[0027] The pneumatic motor 4 drives the flexible telescopic cleaning arm 1 to rotate through the reducer 7 and the rotating wheel 8, so that the flexible wire rope cutter 1-3 of the flexible telescopic cleaning arm 1 generates cutting friction between it and the slab ash 16. At the same time, the rotating cleaning device continuously descends under the drive of the electric chain 26, and the slab ash 16 of the evaporative cooling tower 15 forms small particles that fall off from top to bottom under the action of cutting friction.

[0028] The lighting 14 and the camera 39 are respectively installed in the mounting holes 21 on both sides of the top of the evaporative cooling tower 15 for lighting and monitoring the interior of the evaporative cooling tower 15. The camera 39 is connected to the laptop computer 42 via a communication cable.

[0029] The pneumatic motor 4 has a power of 2.5KW; the reducer 7 is model BLD-29-2.5KW+XLD8-BLD5; the double-ended bolt 12 is M42*600; the counterweight 13 is a cylindrical machined part with dimensions of ∮500*500; the wire rope flexible cutter 1-3 are finished machined parts with a specification of ∮30; the wheel 8 is a machined part with a specification of ∮550*150; the lifting ring 5 is a standard part with a specification of 5T; the circular chain 18 has a specification of 30*108; the electric chain 26 has a specification of 5t / 6m; the observation hole 19 is a ∮600 riveted and welded machined part; the I-beam 27 uses 20# I-beam; the electrical control cabinet 32 ​​has a specification of 40*100*100CM; and the laptop computer 42 is model I5-1135G7.

[0030] The working process of this invention is as follows: When the converter enters its annual overhaul, after the necessary safety measures (such as energy isolation) are in place, first open the observation hole 19 and the maintenance manhole 41 on one side of the top of the evaporative cooling tower 15. Use the electric chain 26 to lift the circular chain 18, pneumatic motor 4, reducer 7, impeller 8, counterweight 13, and metal hose 10. Send the air source end of the metal hose 10 into the observation hole 19, pull it out through the bottom maintenance port to connect the lower air supply device, adjust the electric chain 26 to align with the observation hole 19, and then pass the pneumatic motor 4, reducer 7, impeller 8, and counterweight 13 through... The observation hole 19 is inserted into the evaporative cooling tower 15. When the rotor 8 is at the same height as the maintenance manhole 41, a person stands outside the maintenance manhole 41 and leans out. Each piston cylinder 1-1 is installed on the circumference of the rotor 8 through the thread 1-4 and tightened. Then, the 12 piston rods 1-2 with steel wire rope flexible cutters 1-3 are inserted into the piston cylinders 1-1. The electric chain 26 is operated to lower the steel wire rope flexible cutters 1-3 to below the maintenance manhole 41. The two base plates 3-1 are installed, the air supply of the upper and lower air supply devices is connected, the upper shut-off valve 29 is opened, and the upper regulating valve 28 is opened. With the speed set to 10-50%, the reducer 7 rotates slowly under the drive of the pneumatic motor 4 (approximately 0.5 r / min). The lower shut-off valve 34 is opened, and the lower regulating valve 35 is set to 10-30%. Compressed air enters the air distribution port 2 through the metal hose 10. The pressure acts on the end of the piston rod 1-2 inside the piston cylinder 1-1. The flexible steel wire rope cutter 1-3 extends outward and rubs against the sludge 16 on the inner wall of the evaporative cooling tower, cutting a groove in the sludge 16. The speed of the pneumatic motor 4 is increased through the upper regulating valve 28. When the speed of the rotor 8 reaches a certain value, the speed of the pneumatic motor 4 increases. When the wire rope flexible cutter 1-3 rotates twice per minute, the linear speed of the outer end of the cutter is 2 m / min. The cutting speed at this time should be the optimal cutting speed based on experience. After the wire rope flexible cutter 1-3 contacts the inner wall of the evaporative cooling tower, the opening of the lower regulating valve (35) is set to about 10%. The speed of the electric chain 26 is adjusted according to the thickness of the slab ash 16. The feed speed of the cutter is adjusted. The internal condition is dynamically observed through the camera 39. The opening of the upper regulating valve 28 is adjusted appropriately. The speed of the pneumatic motor 4 is adjusted to obtain a stable cutting and grinding speed.

[0031] The beneficial effect of this invention is that it enables the mechanized cleaning of ash buildup on the inner wall of the dry dust removal evaporative cooling tower in converter steelmaking, which greatly reduces the safety risks and labor intensity of manual high-altitude confined space operations.

Claims

1. A dry dust removal evaporative cooling tower inner wall cleaning device, characterized in that, The device includes an observation hole (19), an electric chain (26), a circular chain (18), a pneumatic motor (4), a rotating wheel (8), flexible telescopic cleaning arms (1), a hose (17), and an upper air supply device. The observation hole (19) is installed directly above the evaporative cooling tower (15). The electric chain (26) is fixed directly above the observation hole (19). The upper end of the circular chain (18) is connected to the electric chain (26), and the lower end passes through the observation hole (19) into the evaporative cooling tower (15) and is connected to the pneumatic motor (4). The output shaft of the pneumatic motor (4) is connected to the rotating wheel (8) below it through a reducer (7). Multiple flexible telescopic cleaning arms (1) are fixed radially around the rotating wheel (8) and correspond to the slab ash (16) on the inner wall of the evaporative cooling tower (15). The two ends of the hose (17) are connected to the pneumatic motor (4) and the upper air supply device, respectively.

2. The dry dust removal evaporative cooling tower inner wall cleaning device according to claim 1, characterized in that, The circular chain (18) is provided with a turn-stopper (3) and a turn-stopper pin plate (20). The turn-stopper (3) includes a base plate (3-1) and two semi-circular tubes (3-2). The base plate (3-1) is horizontally fixed on the observation hole (19). The center of the base plate (3-1) is provided with a central hole (3-3) corresponding to the circular chain (18). The two semi-circular tubes (3-2) are symmetrically fixed on the upper sides of the central hole (3-3) with their concave surfaces facing each other. A turn-stopper gap (3-5) is formed between the vertical sides of the two semi-circular tubes (3-2). The turn-stopper pin plate (20) passes through one link of the circular chain (18) and the two ends of the turn-stopper pin plate (20) are slidably installed in the turn-stopper gap (3-5).

3. The dry dust removal evaporative cooling tower inner wall cleaning device according to claim 2, characterized in that, The base plate (3-1) is composed of two semicircular plates spliced ​​together, with a semicircular tube (3-2) fixed on each semicircular plate.

4. A dry dust removal evaporative cooling tower inner wall cleaning device according to any one of claims 1-3, characterized in that, The bottom of the wheel (8) is provided with a counterweight (13). The counterweight (13) is connected to the wheel (8) by a double-ended bolt (12) and a flange nut (9). The double-ended bolt (12) passes vertically through the center hole of the counterweight (13). The upper end of the double-ended bolt (12) is connected to the threaded hole at the center of the bottom of the wheel (8) by a thread. The lower end of the double-ended bolt (12) is screwed into the flange nut (9).

5. The dry dust removal evaporative cooling tower inner wall cleaning device according to claim 4, characterized in that, The double-ended bolt (12) is a hollow bolt. Each flexible telescopic dust removal arm (1) includes a piston cylinder (1-1), a piston rod (1-2), and a steel wire rope flexible cutter (1-3). The piston rod (1-2) is slidably inserted into the piston cylinder (1-1). One end of the piston cylinder (1-1) is connected to the rotating wheel (8) by a thread and communicates with the inner cavity of the double-ended bolt (12) through the air distribution hole (2) inside the rotating wheel (8). One end of the steel wire rope flexible cutter (1-3) is inserted into the hollow bolt. The other end of the plug cylinder (1-1) is fixedly connected to the piston rod (1-2), and the other end of the steel wire rope flexible cutter (1-3) is opposite to the slab ash (16) on the inner wall of the evaporative cooling tower (15); a metal hose (10) is provided below the counterweight (13), the upper end of the metal hose (10) is connected to the lower end of the double-headed bolt (12) through the lower rotary joint (11), and the lower end of the metal hose (10) passes through the bottom inspection port of the evaporative cooling tower (15) and is connected to the lower air supply device.

6. The dry dust removal evaporative cooling tower inner wall cleaning device according to claim 5, characterized in that, The upper gas supply device includes an upper regulating valve (28), an upper shut-off valve (29), and an upper connecting pipe (30). The upper end of the hose (17) is wound around the spring drum (24) and connected to one end of the upper connecting pipe (30) through an upper rotary joint (25). The other end of the upper connecting pipe (30) is connected to a high-pressure gas source through the upper shut-off valve (29) and the upper regulating valve (28) in sequence. A pressure sensor (31) is installed on the upper connecting pipe (30).

7. The dry dust removal evaporative cooling tower inner wall cleaning device according to claim 6, characterized in that, The lower gas supply device includes a lower shut-off valve (34), a lower regulating valve (35), and a lower connecting pipe (36). One end of the lower connecting pipe (36) is connected to the lower end of the metal hose (10), and the other end is connected to the high-pressure gas source through the lower shut-off valve (34) and the lower regulating valve (35) in sequence. A pressure transmitter (37) is installed on the lower connecting pipe (36).

8. The dry dust removal evaporative cooling tower inner wall cleaning device according to claim 7, characterized in that, It also includes a feed speed control unit, which includes an electrical control box (32), a PLC controller (33) and a frequency converter (43). The PLC controller (33) and the frequency converter (43) are installed inside the electrical control box (32). The control terminal of the upper regulating valve (28) is connected to the PLC controller (33). The control signal input terminal of the frequency converter (43) is connected to the PLC controller (33). The output terminal of the frequency converter (43) is connected to the electric chain (26).

9. The dry dust removal evaporative cooling tower inner wall cleaning device according to claim 8, characterized in that, It also includes a lighting lamp (14) and a camera (39), which are installed in mounting holes 21 on both sides of the top of the evaporative cooling tower (15), and the camera (39) is connected to a laptop computer (42) via a communication cable.

10. The dry dust removal evaporative cooling tower inner wall cleaning device according to claim 9, characterized in that, It also includes a ring chain (22) with the same structure as the ring chain (18), which is connected between the ring chain (18) and the electric chain (26).

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