High-pressure water jet self-driven large-diameter pipeline cleaning device

Abstract

The invention discloses a high-pressure water jet self-driven large-diameter pipeline cleaning device which comprises an outer sleeve, a rotating shaft, a rotary spray-washing head, a spray-washing pipe, supporting legs and the like. According to the cleaning device, mechanical automatic operation replaces personnel entering the roller, so that the operation risk of the personnel in the roller is thoroughly avoided, unmanned cleaning is achieved, the cleaning efficiency is remarkably improved, and the dangerous operation time is shortened. According to the device, the backflushing effect of high-pressure water is fully utilized as forward power, cleaning is completed, and the return stroke depends on dragging of the pneumatic pipe coiling device on the outer side. The forward and reverse rotation of the pipe coiling device is remotely controlled, so that automatic back-and-forth cleaning of the cleaning device in the roller can be realized.

Description

Technical Field

[0001] This invention belongs to the technical field of high-explosion-risk drum cleaning devices, specifically relating to a high-pressure water jet self-driven large-diameter pipe cleaning device. Background Technology

[0002] The drum, located in the F0 zone (hazardous area), operates in an environment where it is constantly exposed to gunpowder, explosives, solid propellants, and mechanical dust. The drum is installed at an angle to the ground, with a slope of approximately 3% to 4%, an inner diameter of 1200 mm, and a total length of approximately 12 meters. A 500 mm diameter manhole is located on the lower end face for maintenance and cleaning; a discharge port is located at the bottom for discharging waste. During cleaning, the drum stops rotating and remains stationary.

[0003] According to F0 zone regulations, electrical equipment should not be installed. For safety reasons, no electrical connections or testing equipment are installed on this drum. After the drum has been running for a period of time, impurities will accumulate on the inner wall, requiring cleaning. Currently, the cleaning method is as follows: operators wearing anti-static protective clothing enter the drum through the manhole, first using a water hose for preliminary rinsing and wetting to soften the impurities on the drum wall, and then manually scrubbing with an anti-static brush. This method places operators in a hazardous environment, posing high risks due to the confined space, making cleaning difficult and extremely dangerous. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a high-pressure water jet self-driven large-diameter pipe cleaning device, which solves the technical problems of operational risks and high-risk explosive conditions in the F0 zone drum cleaning of the existing technology.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A high-pressure water jet self-driven large-diameter pipe cleaning device includes an outer sleeve and a rotating shaft, the rotating shaft being rotatably installed inside the outer sleeve; a rotating spray head is fixedly installed at the center of the axial front end of the rotating shaft, and multiple spray pipes are installed on the axial front end of the rotating spray head, the inner cavity of the spray pipes being connected to the inner cavity of the rotating spray head to form a water flow channel; a pair of legs are hinged to the outer wall of the axial front end of the outer sleeve, the pair of legs being symmetrically arranged.

[0006] This invention has the following technical features: Specifically, the support leg includes an integrated connecting plate, an extension plate, and a roller mounting plate. When the support leg is fully extended, the connecting plate is close to the outer surface of the rotating shaft, the extension plate extends outward in the radial direction, and the roller mounting plate is parallel to the rotating shaft. A roller is rotatably mounted at each of the axial ends of the roller mounting plate.

[0007] Specifically, two pairs of support foot mounting ears are fixedly installed on the outer wall of the axial front end of the rotating shaft. Each pair of support foot mounting ears is equipped with a support foot connecting shaft, and the radial inner end of the support foot is rotatably mounted on the support foot connecting shaft.

[0008] Specifically, the mounting holes of the outrigger mounting ear plate are fitted with outrigger connecting shaft retaining rings and outrigger connecting shaft bushings, which are used to install and fix the two ends of the outrigger connecting shaft.

[0009] Specifically, a front support plate is fixedly installed on the outer wall of the front end of the shaft, and two pairs of support feet mounting ears are arranged at equal intervals with the front support plate along the circumferential direction.

[0010] Specifically, a pair of foot fixing lugs are fixedly installed on the outer wall of the axial rear side of the shaft, and a foot fixing hole is opened on the connecting plate of the foot; when the foot is fully extended, the connecting plate is locked in the foot fixing lug and fixed by a pin.

[0011] Specifically, a rear support plate is fixedly installed on the outer wall of the rear side of the shaft shaft, and two pairs of support foot fixing lugs are arranged at equal intervals with the rear support plate along the circumferential direction.

[0012] Specifically, a roller shaft is installed at each of the two axial ends of the roller mounting plate, and the roller is rotatably mounted on the roller shaft. A roller shaft retainer and a roller shaft sleeve are provided in the mounting hole of the roller mounting plate to fix one end of the roller shaft. At the same time, an end cap is installed on one end of the roller shaft. An oilless bushing is installed on the other end of the roller shaft and is locked in the center hole of the roller.

[0013] Specifically, the inner wall of the roller is designed with steps, which greatly reduces the actual contact area between the roller and the roller shaft, thereby reducing frictional resistance and wear during rotation.

[0014] Specifically, the end cap is made of polyurethane.

[0015] Specifically, the roller is made of conductive nylon.

[0016] Compared with the prior art, the present invention has the following technical effects: The cleaning device of this invention replaces personnel entering the drum with automated mechanical operation, thereby completely eliminating the risks associated with personnel working inside the drum, achieving unmanned cleaning, and significantly improving cleaning efficiency and shortening dangerous operation time. The device fully utilizes the backwashing effect of high-pressure water as the forward propulsion for cleaning, while the return stroke relies on the dragging of an external pneumatic hose reel. Automatic reciprocating cleaning within the drum can be achieved by remotely controlling the forward and reverse rotation of the hose reel.

[0017] The cleaning device of this invention adopts a retractable and simplified design, facilitating the insertion of the drum through the manhole and its internal extension and locking for stable movement. Simultaneously, all friction-rotating parts are equipped with seals or protective covers to effectively prevent explosive impurities from entering the compression gaps, ensuring the device meets F0 zone explosion-proof requirements.

[0018] When using the device of this invention for cleaning, no personnel need to enter the drum during the entire cleaning process. The operator is located outside the F0 zone, observes the color markings on the pipe through a camera to determine the device's positioning, and remotely and automatically controls the hose reel, further ensuring operational safety. Attached Figure Description

[0019] Figure 1 A schematic diagram of the overall structure of a high-pressure water jet self-driven large-diameter pipe cleaning device with the support legs retracted.

[0020] Figure 2 This is a schematic diagram of the overall structure of a high-pressure water jet self-driven large-diameter pipe cleaning device with its legs extended.

[0021] Figure 3 The structure of the high-pressure water jet self-driven large-diameter pipe cleaning device was further demonstrated; Figure 3 In the middle: (A) is the side view; (B) is the DD section view of the side view; (C) is the EE section view of the side view.

[0022] Figure 4 This is a schematic diagram of the roller's installation structure.

[0023] Figure 5 This is a detailed structural diagram of the roller.

[0024] Figure 6 This is a schematic diagram of the layout structure of the present invention during use.

[0025] Figure 7 This is a schematic diagram of the waterway structure of the present invention.

[0026] Figure 8 This is a schematic diagram of the gas path structure of the present invention.

[0027] The labels in the diagram represent the following: 1-Outer sleeve, 2-Spindle, 3-Rotating spray head, 4-Spray pipe, 5-Support leg, 6-Roller, 7-Support leg mounting ear plate, 8-Support leg connecting shaft, 9-Support leg connecting shaft retaining ring, 10-Support leg connecting shaft bushing, 11-Front support plate, 12-Support leg fixing ear plate, 13-Pin, 14-Rear support plate, 15-Roller shaft, 16-Roller shaft retaining ring, 17-Roller shaft bushing, 18-End cap, 19-Oil-free bushing; 20-Factory water source, 21-High-pressure pump station, 22-High-pressure water pipe, 23-Pneumatic hose reel, 24-Factory power supply, 25-Factory air source, 26-Air pipe, 27-Drain pipe, 28-Indoor trench, 29-Outdoor trench, 30-Roller to be cleaned, 31-Operator.

[0028] 501-Connecting plate, 502-Extension plate, 503-Roller mounting plate, 504-Foot fixing hole.

[0029] 601 - Step.

[0030] The specific content of the present invention will be further explained in detail below with reference to the embodiments. Detailed Implementation

[0031] It should be noted that, unless otherwise specified, all components in this invention are components known in the art.

[0032] To achieve the technical objectives of this invention, the following issues must be considered: First, considering that the cleaning equipment operates in a high-risk F0 zone, the main power equipment needs to be located outside the F0 zone. Second, the power source for the cleaning device cannot be electricity; it must be able to automatically clean within the drum. Third, personnel operation must be conducted outside the F0 zone. Fourth, the cleaning device must be strictly sealed to prevent any impurities from entering the gaps during cleaning.

[0033] Based on the above considerations, specific embodiments of the present invention are given below. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent modifications made based on the technical solutions of this application fall within the protection scope of the present invention.

[0034] Example 1: This embodiment provides a high-pressure water jet self-driven large-diameter pipe cleaning device, such as... Figures 1 to 5 As shown, it includes an outer tube 1 and a rotating shaft 2. The rotating shaft 2 is rotatably installed inside the outer tube 1. A rotating spray head 3 is fixedly installed at the center of the axial front end of the rotating shaft 2. Three spray pipes 4 are installed on the axial front end of the rotating spray head 3. The inner cavity of the rotating shaft 2 is connected to the inner cavity of the rotating spray head 3 to form a water flow channel. A pair of support legs 5 are hinged to the outer wall of the axial front end of the outer tube 1. The pair of support legs 5 are symmetrically arranged.

[0035] As a specific embodiment, the rotating shaft 2 is rotatably mounted and supported in the sleeve 1 by at least one pair of bearings.

[0036] As a specific embodiment, the support leg 5 is T-shaped and includes an integrated connecting plate 501, an extension plate 502, and a roller mounting plate 503. When the support leg 5 is fully extended, the connecting plate 501 is close to the outer surface of the rotating shaft 2, the extension plate 502 extends outward in the radial direction, and the roller mounting plate 503 is parallel to the rotating shaft 2. A roller 6 is rotatably mounted at each of the axial ends of the roller mounting plate 503.

[0037] As a specific embodiment, two pairs of support mounting ears 7 are fixedly provided on the outer wall of the front end of the rotating shaft 2. Each pair of support mounting ears 7 is equipped with a support connecting shaft 8. The radial inner end of the support 5 is rotatably mounted on the support connecting shaft 8.

[0038] As a specific embodiment, the mounting holes of the foot mounting ear plate 7 are fitted with foot connecting shaft retaining ring 9 and foot connecting shaft bushing 10, which are used to install and fix the two ends of the foot connecting shaft 8.

[0039] As a specific embodiment, a front support plate 11 is also fixedly installed on the outer wall of the front end of the shaft 2, and two pairs of support foot mounting ear plates 7 are arranged at equal intervals with the front support plate 11 along the circumferential direction.

[0040] As a specific solution of this embodiment, a pair of foot fixing ear plates 12 are fixedly provided on the outer wall of the axial rear side of the rotating shaft 2, and a foot fixing hole 504 is opened on the connecting plate 501 of the foot 5; when the foot 5 is fully extended, the connecting plate 501 is locked in the foot fixing ear plate 12 and fixed by the pin 13.

[0041] As a specific embodiment, a rear support plate 14 is also fixedly installed on the outer wall of the rear side of the rotating shaft 2, and two pairs of support foot fixing ear plates 12 and the rear support plate 14 are arranged at equal intervals along the circumferential direction.

[0042] As a specific embodiment, a roller shaft 15 is installed at each of the two axial ends of the roller mounting plate 503, and the roller 6 is rotatably mounted on the roller shaft 15. A roller shaft retainer 16 and a roller shaft sleeve 17 are provided in the mounting hole of the roller mounting plate 503 to fix one end of the roller shaft 15. At the same time, an end cap 18 is installed on one end of the roller shaft 15. An oilless sleeve 19 is installed on the other end of the roller shaft 15 and is locked in the center hole of the roller 6.

[0043] As a specific solution in this embodiment, a step 601 is designed on the wall surface of the inner hole of the roller 6, which greatly reduces the actual contact area between the roller 6 and the roller shaft 15, thereby reducing the frictional resistance and wear during rotation.

[0044] As a specific embodiment, the end cap 18 is made of polyurethane.

[0045] As a specific embodiment, the roller 6 is made of conductive nylon.

[0046] The layout structure of this invention is as follows (see Figure 6 The factory water source 20, high-pressure pump station 21, high-pressure water pipe 22, and the inlet of the cleaning device (i.e., the axial end of the rotating shaft 2, connected via a rotary joint) are connected in sequence. The factory power supply 24 provides power to the high-pressure pump station 21. The factory air source 25, air pipe 26, and pneumatic hose reel 23 are connected in sequence. The pneumatic hose reel 23 is also connected to the cleaning device via a water pipe. The drum 30 to be cleaned is connected to the drain pipe 27, and the outlet of the drain pipe 27 leads to the indoor trench 28, which is connected to the outdoor trench 29. Then, the axial rear end of the rotating shaft 2 is fixedly connected to the pneumatic hose reel 23 via a threaded structure, and the high-pressure water jet self-driven large-diameter pipe cleaning device is inserted into the drum 30 to be cleaned. The area enclosed by the outdoor trench 29 is the F0 zone, and the area outside the outdoor trench 29 is the F0 outer safety zone. The operator 31 needs to operate in the F0 outer safety zone.

[0047] The design concept of this invention is as follows (see Figure 7 and Figure 8 ): The cleaning device of this invention utilizes high-pressure water as the driving force. Water is sprayed into the cleaning drum 30 in the F0 zone, driving the cleaning device to move within the drum 30 while simultaneously cleaning it using the water jets. Since the cleaning device's recoil force can only be in one direction, a counterforce is needed to pull the device back. Therefore, a pneumatic hose reel 23 is designed to pull the cleaning device back via a connected high-pressure water pipe 22. Because the F0 zone may contain flammable and explosive gases, posing a significant danger, compressed air, rather than electricity, is used to drive the hose reel to prevent any potential electrical sparks from causing an explosion. The factory water source 20 and factory air source 25 are both located in the safe zone outside the F0 zone. After connecting the cleaning device to the pipeline, the operator 31 controls the forward movement of the cleaning device from outside the F0 zone by controlling the start / stop and pressure rise / fall of the high-pressure water circuit. The forward / reverse rotation and speed of the hose reel are controlled by switching pneumatic valves and using pneumatic flow control. This integrated water and air circuit control enables automatic, unmanned operation of the drum cleaning device without direct electrical power. The cleaning device features a simplified design, primarily using aerospace-grade aluminum and conductive non-metallic materials to reduce overall weight. Sealed sleeves are added to rotating and other parts of the cleaning device to prevent or hinder sensitive impurities from entering the gaps in the rotating components.

[0048] Based on the above design requirements and design concept, the overall cleaning device consists of a mobile integrated high-pressure pump station 21, a temporary hose reel and reel for the pump station and a high-pressure water hose reel 22, a control cabinet, a pneumatic control valve group, an independent mobile pneumatic hose reel and reel for the high-pressure water hose 22 cleaning device, etc.

[0049] The mobile integrated pump station integrates all components of a high-pressure pump station, such as the transition water tank, inlet booster pump, filter, lubrication oil system, lubrication and cooling system, high-pressure plunger pump and its motor, control cabinet, and other necessary equipment, as well as temporary pipe reel and pneumatic control valve assembly, into one unit. This saves space and facilitates movement, making it highly suitable for on-site requirements. Since the cleaning process in this application is typically performed after a period of production, not daily, this equipment is only moved to the cleaning location or designated position and connected to power during cleaning. The centralized pump station primarily provides power to the overall mechanism. The integrated pump station primarily provides the power source and control system for the cleaning device.

[0050] The temporary pipe reel and reel for the pump station is mainly used to store the high-pressure water pipe 22 that is temporarily connected to the water circuit. The high-pressure water pipe 22 has a high pressure bearing capacity, so the material is hard. For easy pipe reeling and unloading, a pneumatic motor is used to drive the reel to collect and store the high-pressure water pipe 22 that is temporarily connected to the water circuit.

[0051] The control cabinet contains a booster pump, a high-pressure plunger pump controlled by a variable frequency motor, and water circuit alarm controls. It mainly controls 1. the start and stop of the water circuit, 2. the pressure rise and fall of the high-pressure water, and 3. the system water shortage and low water pump station protection shutdown alarm.

[0052] The air source is provided by the factory. The pneumatic control valve is used in locations with high explosion-proof requirements, so manual control valves are used to control the three air supply lines: The first line uses a manual directional valve to control the start, stop, and forward / reverse rotation of the temporary water pipe reel in the pump station, and the reeling speed is controlled by a manual speed control valve to adjust the air intake of the pneumatic motor; the second line uses a manual directional valve to control the start, stop, and forward / reverse rotation of the movable reel, and the reeling speed is controlled by a manual speed control valve to adjust the air intake of the pneumatic motor; the third line is used for backflushing residual water in the high-pressure water system. A high-pressure check valve is installed at the front end, followed by a high-pressure needle valve. After the cleaning operation is completed, the needle valve is opened to backflush the residual water in the water system.

[0053] The cleaning device moves forward using the recoil force of the sprayed water jet. The main obstacle to its movement is the resistance caused by the gravity of the connected high-pressure water pipe 22. Therefore, the movable part of the high-pressure water pipe 22 should not be too long, otherwise the cleaning device will be unable to move the pipe and achieve the cleaning function. Therefore, a movable pneumatic hose reel 23 is added to the F0 zone roller being cleaned. A pneumatic motor drives the hose reel 23 to rotate, enabling the reeling and unwinding of the hose. This independent movable pneumatic hose reel and the reeling / unwinding high-pressure water pipe 22 are designed for this purpose. The high-pressure water pipe 22 can be color-coded to indicate the specific reeling / unwinding distance for the pneumatic hose reel 23.

[0054] The cleaning device employs a special hinge structure, allowing for extension and retraction. When the support leg 5 is retracted, the overall volume decreases, allowing it to be inserted into the cleaning drum 30 through the manhole. After insertion, the hinge structure is engaged and locked in place using the pin 13, maintaining the hinge in an open state. The roller 6 then moves along the wall of the cleaning drum 30. A polyurethane end cap 18 is provided on the outer side of the roller shaft 15, fitting into a pre-drilled dovetail groove to effectively prevent explosive impurities from entering the shaft gap. Protective sleeves made of anti-static fabric are installed at the rotating shaft 2 and the rotating spray head 3, effectively preventing explosive impurities from entering the gap between the rotating spray heads. The entire device is constructed of aviation-grade aluminum or conductive non-metallic materials, weighing approximately 12 kg, facilitating insertion into the cleaning drum 30 and improving the device's operation. The roller 6 is made of non-metallic conductive nylon, effectively reducing weight and minimizing the risk of compression due to metal-to-metal friction.

[0055] The operation process of using this invention is as follows: After connecting the pipeline, place the cleaning device into the drum 30 to be cleaned. Turn on the high-pressure pump station 21 and adjust the water pressure to an appropriate level. Under this pressure, the cleaning device can move within the drum 30 using the back pressure of the high-pressure water. Move the pneumatic hose reel 23 to the unloading position, and the cleaning device will be slowly released by the back pressure of the high-pressure water. Move the cleaning device to the water pipe marking position, then switch the pneumatic valve to the reverse position. The cleaning device will be pulled back by the pneumatic hose reel 23 while maintaining high-pressure water flow. Rotate the high-pressure water pipe 22 until it reaches the reverse color mark, indicating that the reverse flushing is complete. The unloading and reloading actions can be repeated to achieve back-and-forth cleaning. Continue until the cleaning standard is met, then retract the equipment to complete the cleaning of the F0 zone drum.

[0056] In summary, this invention is suitable for cleaning projects involving large, horizontally oriented drums with a single-sided opening, specifically in the F0 zone, where direct power connection is not feasible. This invention utilizes water reaction to propel the device forward, and a connected hose reel pulls it outward, enabling the cleaning device to move in reverse. The cleaning device of this invention is telescopic, allowing for extension and retraction via simple plug-and-play pins. It can be inserted into the tank through the manhole neck and then extended to achieve its movement function. Because the cleaning device incorporates a shaft end-face sealing structure and conductive rollers, it can complete cleaning operations in highly sensitive, stationary dust drums in the F0 zone.

Claims

1. A high-pressure water jet self-driven large-diameter pipeline cleaning device, characterized in that, The utility model provides a rotating spray head, including outer sleeve (1) and pivot (2), pivot (2) rotatablely installed in outer sleeve (1) inside, the center fixed mounting of pivot (2) axial front end has rotary spray head (3), and the axial front end of rotary spray head (3) is installed with a plurality of spray pipe (4), and the inner chamber of spray pipe (4) is linked together with the inner chamber of rotary spray head (3), and constitutes water flow channel, and the outer wall of outer sleeve (1) axial front end is hinged with a pair of support leg (5), and a pair of support leg (5) are symmetrically arranged.

2. The high-pressure water jet self-driven large-diameter pipeline cleaning device according to claim 1, characterized in that, The support leg (5) includes a connecting plate (501), an extension plate (502), and a roller mounting plate (503) arranged integrally. When the support leg (5) is fully unfolded, the connecting plate (501) is in close contact with the outer surface of the pivot (2), the extension plate (502) extends outward along the radial direction, and the roller mounting plate (503) is parallel to the pivot (2). One roller (6) is rotatably installed at each axial end of the roller mounting plate (503).

3. The high-pressure water jet self-driven large-diameter pipeline cleaning device according to claim 1, characterized in that, Two pairs of support leg mounting ear plates (7) are fixedly arranged on the outer wall of the axial front end of the pivot (2). One support leg connecting shaft (8) is installed in each support leg mounting ear plate (7). The radial inner end of the support leg (5) is rotatably installed on the support leg connecting shaft (8).

4. The high-pressure water jet self-driven large-diameter pipeline cleaning device according to claim 1, characterized in that, The support leg connecting shaft collar (9) and the support leg connecting shaft sleeve (10) are installed in the mounting hole of the support leg mounting ear plate (7) to install and fix the two ends of the support leg connecting shaft (8).

5. The high-pressure water jet self-driven large-diameter pipeline cleaning device according to claim 1, characterized in that, A front support plate (11) is further fixedly arranged on the outer wall of the axial front end of the pivot (2). The two pairs of support leg mounting ear plates (7) are equidistantly arranged along the circumferential direction of the front support plate (11).

6. The high-pressure water jet self-driven large-diameter pipeline cleaning device according to claim 1, characterized in that, A pair of support leg fixing ear plates (12) are fixedly arranged on the outer wall of the axial rear side of the pivot (2). A support leg fixing hole (504) is opened on the connecting plate (501) of the support leg (5). When the support leg (5) is fully unfolded, the connecting plate (501) is clamped in the support leg fixing ear plate (12) and is fixed by a latch (13).

7. The high-pressure water jet self-driven large-diameter pipeline cleaning device according to claim 1, characterized in that, A rear support plate (14) is further fixedly arranged on the outer wall of the axial rear side of the pivot (2). The two pairs of support leg fixing ear plates (12) are equidistantly arranged along the circumferential direction of the rear support plate (14).

8. The high-pressure water jet self-driven large-diameter pipeline cleaning device according to claim 1, characterized in that, One roller shaft (15) is installed at each axial end of the roller mounting plate (503). The roller (6) is rotatably installed on the roller shaft (15). The roller shaft collar (16) and the roller shaft sleeve (17) are arranged in the mounting hole of the roller mounting plate (503) to fix one end of the roller shaft (15). An end cover (18) is installed on one end of the roller shaft (15). An oil-free sleeve (19) is installed on the other end of the roller shaft (15). The oil-free sleeve (19) is clamped in the center hole of the roller (6).

9. The high-pressure water jet self-driven large-diameter pipeline cleaning device according to claim 1, characterized in that, A step (601) is designed on the wall surface of the inner hole of the roller (6).

10. The high-pressure water jet self-driven large-diameter pipeline cleaning device according to claim 1, characterized in that, The end cover (18) is made of polyurethane. The roller (6) is made of conductive nylon.

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