A large-scale closed pressure vessel internal cleaning system and cleaning method

Abstract

A large-scale closed pressure vessel internal cleaning system and cleaning method includes a walking cleaning device, a sewage collection tank, and a cleaning water supply device. The walking cleaning device can be adsorbed on the inner wall of the pressure vessel and walk. A spray gun is installed on the walking cleaning device. The sewage collection tank can be connected to the pressure vessel through a connecting pipe. The cleaning water supply device includes a water tank and a water pump. The water inlet end of the water pump extends into the water tank. The water outlet end of the water pump is connected to one end of a hose. The other end of the hose passes through the connecting pipe from the sewage collection tank into the pressure vessel and is connected to the spray gun for water supply. Through the above structure, the walking cleaning device enters the interior of the pressure vessel to complete the cleaning work of the entire internal area of ​​the pressure vessel. It has stronger versatility and effectively avoids various risks of personnel entering the interior of the pressure vessel, thereby improving the safety of the work, improving work efficiency, reducing the labor intensity of construction personnel, and avoiding environmental pollution.

Description

Technical Field

[0001] The present invention relates to the technical field of closed container cleaning, and in particular to a system and method for cleaning the interior of a large closed pressure vessel. Background Art

[0002] There are a certain number of large pressure vessels arranged inside large and medium-sized hydropower stations in China. After they have been in operation for a period of time, the inside of the pressure vessels needs to be cleaned. The current main operation method is to manually enter the pressure vessels for cleaning. The current method has many safety hazards: First, the ventilation inside the closed container is poor, and there is a great safety hazard for construction workers entering; second, the cleaning of large pressure vessels involves high-altitude operations and edge operations, and the interior is slippery, so people are prone to slipping and falling, which poses a high safety risk; third, there are risks of oil leakage and environmental pollution during the cleaning process; fourth, the labor intensity of construction workers is high and the work efficiency is low.

[0003] In the prior art, although there are some solutions for cleaning the inner wall of a pressure vessel, for example, CN216323980U discloses a pressure vessel inner wall cleaning device. When in use, the mobile frame is moved to the pressure vessel, the cleaning rod is placed inside the pressure vessel, and the cleaning rod is rotated to move the sliding platform up and down, driving the cleaning rod up and down. The water supply unit sprays cleaning water from the cleaning nozzle to complete the cleaning of the inner wall of the pressure vessel. This device is suitable for cleaning small pressure vessels. For large pressure vessels, a larger and taller mobile frame is required, which is limited by on-site construction conditions. In addition, the top of a large pressure vessel may not have an opening, so this device has great limitations. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: to solve the problems existing in the above-mentioned background technology, and to provide a large-scale closed pressure vessel internal cleaning system and cleaning method. Personnel no longer need to enter the closed pressure vessel to perform cleaning operations. They only need to let the walking cleaning device enter the pressure vessel to complete the cleaning work of the entire internal area of ​​the pressure vessel. It is more versatile and effectively avoids various risks of personnel entering the pressure vessel, improves the safety of the work, improves work efficiency, reduces the labor intensity of construction personnel, and avoids environmental pollution.

[0005] In order to achieve the above-mentioned technical features, the purpose of the present invention is achieved as follows: a large-scale closed pressure vessel internal cleaning system, comprising a walking cleaning device, a sewage collection tank and a cleaning water supply device, wherein the walking cleaning device can be adsorbed on the inner wall of the pressure vessel and walk, a spray gun is installed on the walking cleaning device, the sewage collection tank can be connected to the pressure vessel through a connecting pipe, the cleaning water supply device comprises a water tank and a water pump, the water inlet end of the water pump extends into the water tank, the water outlet end of the water pump is connected to one end of a hose, and the other end of the hose passes through the connecting pipe from the sewage collection tank into the interior of the pressure vessel, and is connected to the spray gun for water supply, and the power supply control cable of the walking cleaning device passes through the connecting pipe and is electrically connected to the control system.

[0006] The walking cleaning device includes an adsorption device and a driving device installed on the lower side of the adsorption device. The adsorption device includes a shell and an adsorption component installed inside the shell. The spray gun is installed on the shell of the adsorption device.

[0007] The adsorption component is an electromagnet or a negative pressure suction cup.

[0008] An oil-water separation device is installed in the sewage collection box. A sewage pump is also installed on the sewage collection box. The water inlet of the sewage pump extends into the sewage collection box, and the water outlet of the sewage pump is connected to the sewage pipe.

[0009] The oil-water separation device is a partition installed in the sewage collection tank, on which oil filter paper is installed. The partition divides the sewage collection tank into an oily sewage tank and a primary separation water tank. The connecting pipe is connected to one side of the oily sewage tank, and the water inlet end of the sewage pump extends into the primary separation water tank.

[0010] The water tank of the cleaning water supply device includes a mixing cleaning water tank and a clean water tank. There are two water pumps. The water inlet ends of the two water pumps are respectively located in the mixing cleaning water tank and the clean water tank. The water outlet ends of the two water pumps are respectively installed with one-way valves and connected in parallel with the hose.

[0011] The cleaning water supply device is also equipped with a power system, which supplies power to the walking cleaning device, the water pump and the control system.

[0012] The walking cleaning device is also equipped with one or more of a monitoring system, an infrared scanning system, and a lighting system, and the monitoring system, the infrared scanning system, and the lighting system are electrically connected to the control system respectively.

[0013] The control system is installed on the cleaning water supply device, an operating platform is installed on the water tank of the cleaning water supply device, and the control system is installed on the operating platform; the control system includes a visual system and an operating system.

[0014] The cleaning method of the internal cleaning system of a large-scale closed pressure vessel comprises the following steps:

[0015] S1. Drain the oil medium in the pressure vessel to be cleaned through the bottom drain valve, then remove the bottom drain pipe and valve of the pressure vessel.

[0016] S2. Connect one end of the connecting pipe to the flange at the bottom of the pressure vessel and the other end to the sewage collection tank.

[0017] S3. The walking cleaning device is placed into the connecting pipe from the sewage collection tank, and the walking cleaning device is controlled by the control system from the connecting pipe into the pressure vessel;

[0018] S4. Through the control system, the water pump starts to provide pressure cleaning fluid for the spray gun, and the walking cleaning device cleans the inside of the pressure vessel;

[0019] S5. The cleaned sewage flows from the connecting pipe into the sewage collection tank for collection.

[0020] The present invention has the following beneficial effects:

[0021] 1. The walking cleaning device can be adsorbed on the inner wall of the pressure vessel and can move on the inner wall of the pressure vessel. The water pump transports the cleaning liquid in the water tank to the spray gun through a hose. The high-pressure water sprayed from the spray gun cleans the inner wall of the pressure vessel. The cleaned sewage flows into the sewage collection tank through the connecting pipe. Personnel no longer need to enter the closed pressure vessel for cleaning operations. They only need to let the walking cleaning device enter the pressure vessel to complete the cleaning work of the entire internal area of ​​the pressure vessel. It is more versatile and effectively avoids various risks of personnel entering the pressure vessel, improving the safety of the work, improving work efficiency, reducing the labor intensity of construction personnel, and avoiding environmental pollution.

[0022] 2. Use the water in the cleaning tank containing detergent to clean the inner wall of the pressure vessel. After cleaning, turn off the water pump of the cleaning tank and turn on the water pump of the clean water tank to rinse the pressure vessel with the cleaning water in the clean water tank. After using the prepared cleaning solution for preliminary cleaning, use clean water for the final cleaning to ensure a more thorough cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the pressure vessel structure.

[0024] Figure 2 The figure is a schematic diagram of the structure of the present invention installed on a pressure vessel.

[0025] Figure 3 This is a schematic diagram of the main structure of the walking cleaning device of the present invention.

[0026] Figure 4This is a schematic diagram of the structure of the walking cleaning device of the present invention from a top view.

[0027] Figure 5 It is a structural schematic diagram of the sewage collection box and the cleaning water supply device of the present invention.

[0028] Figure 6 Schematic diagram of the control system of the present invention.

[0029] In the figure: pressure vessel entrance door 1, pressure vessel 2, pressure vessel support legs 3, concrete foundation 4, bottom oil drain pipe 5, bottom oil drain valve 6, walking cleaning device 7, adsorption device 701, drive device 702, monitoring system 703, infrared scanning system 704, height adjustment device 706, spray gun 707, lighting system 708, connecting pipe 8, hose 9, sewage collection tank 10, oily sewage tank 1001, primary separation water tank 1002, cleaning water supply device 11, mixing cleaning water tank 1101, clean water tank 1102, casters 12, power system 13, operating platform 14, control system 15, visual system 1501, operating system 1502, filter 16, clean water connecting pipe 17, water pump 18, sewage pipe 19, sewage pump 20, oil-water separation device 21, hose automatic retraction device 22. DETAILED DESCRIPTION

[0030] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0031] Example 1:

[0032] See also Figure 1-6A large-scale closed pressure vessel internal cleaning system includes a walking cleaning device 7, a sewage collection tank 10 and a cleaning water supply device 11. The walking cleaning device 7 can be adsorbed on the inner wall of the pressure vessel 2 and walk. A spray gun 707 is installed on the walking cleaning device 7. The sewage collection tank 10 can be connected with the pressure vessel 2 through a connecting pipe 8. The cleaning water supply device 11 includes a water tank and a water pump 18. The water inlet end of the water pump 18 extends into the water tank, and the water outlet end of the water pump 18 is connected to one end of a hose 9. The other end of the hose 9 passes through the connecting pipe 8 from the sewage collection tank 10 into the interior of the pressure vessel 2 and is connected to the spray gun 707 for water supply. The power supply control cable of the walking cleaning device 7 passes through the connecting pipe 8 and is electrically connected to the control system 15. The walking cleaning device 7 can be adsorbed on the inner wall of the pressure vessel 2 and can walk on the inner wall of the pressure vessel 2. The water pump 18 transports the cleaning liquid in the water tank to the spray gun 707 through the hose 9. The high-pressure water sprayed from the spray gun 707 cleans the inner wall of the pressure vessel 2, and the cleaned sewage flows into the sewage collection tank 10 from the connecting pipe 8. With the above structure, personnel no longer need to enter the closed pressure vessel to perform cleaning operations. They only need to let the walking cleaning device enter the interior of the pressure vessel to complete the cleaning work of the entire internal area of ​​the pressure vessel. It is more versatile and effectively avoids various risks of personnel entering the interior of the pressure vessel, thereby improving the safety of the work, improving work efficiency, reducing the labor intensity of construction personnel, and avoiding environmental pollution.

[0033] See also Figure 3 、 4 The walking cleaning device 7 includes a suction device 701 and a drive device 702 mounted on the lower side of the suction device 701. The suction device 701 includes a housing and a suction assembly mounted inside the housing. The spray gun 707 is mounted on the housing of the suction device 701. The drive device 702 can adopt a four-wheel structure or a crawler structure. The walking cleaning device 7 adopts existing technologies, such as the structure of a suction cup and a suction walking device disclosed in CN217730609U, and the structure of a magnetic adsorption walking device and a magnetic adsorption wall-climbing robot disclosed in CN109533054B.

[0034] Specifically, the adsorption component is an electromagnet or a negative pressure suction cup.

[0035] For further information, see Figure 3 In order to facilitate the adjustment of the spray angle of the spray gun 707, the end of the spray gun 707 away from the nozzle is hinged to the walking cleaning device 7, and the side of the spray gun 707 close to the nozzle is connected to the walking cleaning device 7 through the height adjustment device 706. The height adjustment device 706 is an electric push rod, and the angle of the spray gun 707 is adjusted by the extension and retraction of the electric push rod.

[0036] The installation position of the spray gun 707 can be installed as needed, and can be installed on the top of the walking cleaning device 7, or can be installed on the side of the walking cleaning device 7.

[0037] See also Figure 5 An oil-water separator 21 is installed in the sewage collection tank 10. A sewage pump 20 is also installed on the sewage collection tank 10. The water inlet of the sewage pump 20 extends into the sewage collection tank 10, and the water outlet of the sewage pump 20 is connected to the sewage pipe 19. The oil-water separator 21 separates the oil and dirt in the sewage collection tank 10.

[0038] Specifically, the oil-water separator 21 is a screen installed within the sewage collection tank 10. Oil filter paper is mounted on the screen, dividing the sewage collection tank 10 into an oily sewage tank 1001 and a primary separation water tank 1002. A connecting pipe 8 is connected to one side of the oily sewage tank 1001, and the water inlet of the sewage pump 20 extends into the primary separation water tank 1002. The oil is filtered through the oil filter paper. Of course, the oil-water separator 21 can also be a belt-type oil-water separator.

[0039] See also Figure 5 The water tank of the cleaning water supply device 11 includes a mixed cleaning water tank 1101 and a clean water tank 1102. Two water pumps 18 are provided, with their water inlets located in the mixed cleaning water tank 1101 and the clean water tank 1102, respectively. The water outlets of the two water pumps 18 are each installed with a one-way valve and connected in parallel to the hose 9. The inner wall of the pressure vessel 2 is first cleaned with the cleaning agent in the mixed cleaning water tank 1101. After cleaning, the water pump in the mixed cleaning water tank 1101 is turned off, and the water pump in the clean water tank 1102 is turned on. The pressure vessel 2 is then rinsed with the cleaning water in the clean water tank 1102. After the initial cleaning with the mixed cleaning solution, the final cleaning process is performed with clean water, ensuring a more thorough cleaning.

[0040] In order to facilitate the convenient movement of the sewage collection tank 10 and the cleaning water supply device 11 , casters 12 are installed at the bottom of the sewage collection tank 10 and the cleaning water supply device 11 .

[0041] In order to ensure that the rinse is finally completed, a filter 16 is installed at the end of the clean water communicating pipe 17 in the clean water tank 1102. The filter 16 filters the clean water in the clean water tank 1102.

[0042] In order to facilitate the retraction and extension of the hose 9, an automatic hose retracting and extending device 22 is installed on the top of the sewage collection box 10. The automatic hose retracting and extending device 22 can adopt an automatic oil pipe retracting and extending device for cleaning machines disclosed in CN204980665U.

[0043] See also Figure 5The cleaning water supply device 11 is also equipped with a power system 13, which supplies power to the walking cleaning device 7, the water pump 18, and the control system 15. The power system 13 is installed on the side of the cleaning water supply device 11 and is a rechargeable power system or an external power system. The power system 13 provides power for the entire cleaning system to meet the normal use of each component.

[0044] See also Figure 1 、 2 , one or more of a monitoring system 703, an infrared scanning system 704, and a lighting system 708 are also installed on the walking cleaning device 7, and the monitoring system 703, the infrared scanning system 704, and the lighting system 708 are electrically connected to the control system 15 respectively. 703 The monitoring system 703 is installed on the four sides of the walking cleaning device 7, and is composed of four groups of micro-monitoring devices. There is no specific requirement for the specific number, which can realize functions such as lighting, observation, and taking pictures. The infrared scanning system 704 is at the front end of the walking cleaning device 7, and is used to perform infrared scanning on the inside of the pressure vessel 2. Preferably, the lighting system 708 is installed on the spray gun 707. After the inner wall of the pressure vessel 2 is scanned by the infrared scanning system 704 and the monitoring system 703, the walking cleaning device 7 can move autonomously in different areas for cleaning, realize automatic operation, and improve work efficiency.

[0045] See also Figure 5 、 6 The control system 15 is installed on the cleaning water supply device 11. An operating platform 14 is mounted on the water tank of the cleaning water supply device 11. The control system 15 is installed on the operating platform 14. The control system 15 includes a visual system 1501 and an operating system 1502. The control system 15 is used to control the operation of the entire system and the movement and linkage of the equipment. The visual system 1501 is used to visualize the cleaning process and directly present infrared scanning images; the operating system 1502 is used to control the overall operation of the system.

[0046] See also Figure 6 ,In the operating system 1502, the button S1 main switch is the main switch of the entire system, ,which controls the power source of the entire system;

[0047] Button S2 infrared system switch controls the start and stop of the infrared scanning system 704 function;

[0048] Button S3 camera system switch and lighting switch control the start and stop of monitoring system 703 and lighting system 708;

[0049] Button S4 rocker controls the movement of the walking cleaning device 7 forward and backward, left and right;

[0050] Button S5 spray gun raising button controls the increase of the angle of the spray gun 707;

[0051] Button S6 spray gun lowering button controls the angle of the spray gun 707 to decrease;

[0052] Button S7 camera zoom button controls the zoom function of surveillance system 703 camera;

[0053] Button S8 camera zoom out button controls the zoom out function of the monitoring system 703 camera;

[0054] Button S11 main pump group start button controls the start function of water pump 18;

[0055] Button S12 main pump group stop button controls the stop function of water pump 18;

[0056] Button S13 main pump group no-load button controls the no-load function of water pump 18;

[0057] Button S21 sewage pump group start button controls the start function of the sewage pump 20;

[0058] Button S22 sewage pump group stop button controls the stop function of the sewage pump 20;

[0059] Button S23 is a sewage pump group no-load button that controls the no-load function of the sewage pump 20 .

[0060] Example 2:

[0061] Figure 1 In the figure, a pressure vessel entrance door 1 is provided on the pressure vessel 2, a pressure vessel support leg 3 is provided at the bottom of the pressure vessel 2, the pressure vessel support leg 3 is installed on a concrete foundation 4, and a bottom oil drain pipe 5 and a bottom oil drain valve 6 are installed on the bottom flange of the pressure vessel 2.

[0062] See also Figure 2-6 The cleaning method of the internal cleaning system of a large-scale closed pressure vessel is adopted, comprising the following steps:

[0063] Step 1. After draining the oil medium in the pressure vessel 2 to be cleaned through the bottom oil drain valve 6, remove the bottom oil drain pipe 5 and the bottom oil drain valve 6 of the pressure vessel 2.

[0064] Step 2. Connect one end of the connecting pipe 8 to the flange at the bottom of the pressure vessel 2 and the other end to the sewage collection tank 10.

[0065] Step 3. Place the traveling cleaning device 7 from the sewage collection tank 10 into the connecting pipe 8 . The traveling cleaning device 7 is controlled by the control system 15 to enter the pressure vessel 2 from the connecting pipe 8 .

[0066] Step 4. Under the control of control system 15, water pump 18 starts to supply pressure cleaning solution to spray gun 707, and traveling cleaning device 7 cleans the interior of the pressure vessel. During cleaning, the water pump of the mixing and cleaning water tank 1101 starts first, and the inner wall of pressure vessel 2 is cleaned with the prepared cleaning solution in the mixing and cleaning water tank 1101. After cleaning is completed, the water pump of the mixing and cleaning water tank 1101 is turned off, and the water pump of the clean water tank 1102 is turned on. The clean water in the clean water tank 1102 is then used to rinse the inner wall of pressure vessel 2.

[0067] Step 5. The cleaned sewage flows from the connecting pipe 8 into the sewage collection tank 10 for collection.

Claims

1. A method for cleaning the interior of a large closed pressure vessel, characterized in that: A large-scale closed pressure vessel internal cleaning system is adopted, the cleaning system comprises a walking cleaning device (7), a sewage collection tank (10) and a cleaning water supply device (11), the walking cleaning device (7) can be adsorbed on the inner wall of the pressure vessel (2) and walk, a spray gun (707) is installed on the walking cleaning device (7), the sewage collection tank (10) can be connected to the pressure vessel (2) through a connecting pipe (8), the cleaning water supply device (11) comprises a water tank and a water pump (18), the water inlet end of the water pump (18) extends into the water tank, the water outlet end of the water pump (18) is connected to one end of a hose (9), the other end of the hose (9) passes through the connecting pipe (8) from the sewage collection tank (10) into the interior of the pressure vessel (2), and is connected to the spray gun (707) for water supply, and the power supply control cable of the walking cleaning device (7) passes through the connecting pipe (8) and is electrically connected to the control system (15); The cleaning method includes the following steps: S1. Drain the oil medium in the pressure vessel (2) to be cleaned through the bottom oil drain valve (6), and then remove the bottom oil drain pipe (5) and the bottom oil drain valve (6) of the pressure vessel (2); S2. Connect one end of the connecting pipe (8) to the flange at the bottom of the pressure vessel (2), and the other end to the sewage collection tank (10); S3. The walking cleaning device (7) is placed from the sewage collection tank (10) into the connecting pipe (8), and the walking cleaning device (7) is controlled by the control system (15) to enter the pressure vessel (2) from the connecting pipe (8); S4. The water pump (18) is started to provide pressure cleaning fluid to the spray gun (707) through the control system (15), and the walking cleaning device (7) cleans the interior of the pressure vessel; S5. The cleaned sewage flows from the connecting pipe (8) into the sewage collection tank (10) for collection.

2. A method for cleaning the interior of a large-scale closed pressure vessel according to claim 1, characterized in that: The walking cleaning device (7) comprises an adsorption device (701) and a driving device (702) installed on the lower side of the adsorption device (701); the adsorption device (701) comprises a housing and an adsorption assembly installed inside the housing; and the spray gun (707) is installed on the housing of the adsorption device (701).

3. A method for cleaning the interior of a large-scale closed pressure vessel according to claim 2, characterized in that: The adsorption component is an electromagnet or a negative pressure suction cup.

4. A method for cleaning the interior of a large-scale closed pressure vessel according to claim 1, characterized in that: An oil-water separation device (21) is installed in the sewage collection box (10). A sewage pump (20) is also installed on the sewage collection box (10). The water inlet end of the sewage pump (20) extends into the sewage collection box (10), and the water outlet end of the sewage pump (20) is connected to the sewage pipe (19).

5. A method for cleaning the interior of a large-scale closed pressure vessel according to claim 4, characterized in that: The oil-water separation device (21) is a screen installed in the sewage collection tank (10), and oil filter paper is installed on the screen. The screen divides the sewage collection tank (10) into an oily sewage tank (1001) and a primary separation water tank (1002). The connecting pipe (8) is connected to one side of the oily sewage tank (1001), and the water inlet end of the sewage pump (20) extends into the primary separation water tank (1002).

6. The method for cleaning the interior of a large-scale closed pressure vessel according to claim 1, characterized in that: The water tank of the cleaning water supply device (11) comprises a mixing cleaning water tank (1101) and a clean water tank (1102), and two water pumps (18) are provided. The water inlet ends of the two water pumps (18) extend into the mixing cleaning water tank (1101) and the clean water tank (1102), respectively. The water outlet ends of the two water pumps (18) are respectively installed with one-way valves and connected in parallel with the hose (9).

7. The method for cleaning the interior of a large-scale closed pressure vessel according to claim 1, characterized in that: The cleaning water supply device (11) is also equipped with a power system (13), which supplies power to the walking cleaning device (7), the water pump (18) and the control system (15).

8. The method for cleaning the interior of a large-scale closed pressure vessel according to claim 1, characterized in that: The walking cleaning device (7) is further equipped with one or more of a monitoring system (703), an infrared scanning system (704), and a lighting system (708), and the monitoring system (703), the infrared scanning system (704), and the lighting system (708) are electrically connected to the control system (15) respectively.

9. A method for cleaning the interior of a large-scale closed pressure vessel according to claim 1 or 8, characterized in that: The control system (15) is installed on the cleaning water supply device (11); an operating platform (14) is installed on the water tank of the cleaning water supply device (11); and the control system (15) is installed on the operating platform (14); the control system (15) includes a visual system (1501) and an operating system (1502).

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