Equipment for cleaning powder on inner wall of tank body

Abstract

The utility model relates to the technical field of cleaning equipment, in particular to equipment for cleaning powder on the inner wall of a tank body, which comprises a frame, a connecting arm and a cleaning frame, the frame is used for supporting the connecting arm to perform lifting and descending operation to keep stable, and the frame performs lifting, descending and horizontal steering operation through multi-axis rotation of the connecting arm. The three-dimensional space covering of the spray head in the tank body is achieved, blind areas of traditional fixed spray heads such as the back face of a stirring shaft and the top of the tank are thoroughly cleaned, the spray head is attached to the curvature of the inner wall of the tank body in a self-adaptive mode through the design of spring damping and branch pipe water spraying grooves, and it is ensured that the impact force of water flow evenly covers the complex surface. The pressure pump and the shower holes spray in a grading mode, stubborn stains are impacted through high-pressure water flow, low-pressure atomization covers a large-area area, and the water resource utilization rate is optimized.

Description

Technical Field

[0001] This utility model relates to the field of cleaning equipment technology, and in particular to a device for cleaning powder from the inner wall of a tank. Background Technology

[0002] The can is designed to prevent powder leakage, ensuring that the stored medium is isolated from the external environment and avoiding contamination or moisture. It is especially suitable for flammable and hygroscopic powders. Long-term accumulation of powder residue may accelerate corrosion of the inner wall of the can. Regular cleaning can reduce metal oxidation and rust, remove powdery residues adhering to the inner wall of the can, prevent cross-contamination caused by mixing with new stored substances, and ensure the purity of the stored medium and product quality.

[0003] Meanwhile, fixed or single-axis nozzles cannot achieve three-dimensional cleaning without dead angles, resulting in residual powder on the back of the mixing shaft, the top of the tank, and other areas. The unidirectional cleaning movement causes the stains to gradually accumulate in dead angles. When the residual powder is in contact with corrosive powder for a long time, it is easy to oxidize, which accelerates the aging of the equipment and affects the overall performance. Utility Model Content

[0004] To overcome the limitations of fixed or single-axis nozzles in achieving three-dimensional, dead-angle-free cleaning, which results in powder residue on areas such as the back of the mixing shaft and the top of the tank, and the gradual accumulation of dirt in dead corners due to unidirectional cleaning movement, this invention provides a device for cleaning powder from the inner wall of a tank.

[0005] The technical solution is as follows: A device for cleaning powder from the inner wall of a tank includes a frame, a connecting arm, and a cleaning frame. The frame supports the connecting arm for lifting and lowering operations to maintain stability. The frame is connected to the connecting arm for turning the cleaning frame to reach the corresponding dead corner inside the tank. The end of the connecting arm away from the frame is connected to the cleaning frame for rotating operations to clean the powder from the inner wall of the tank. The cleaning frame is equipped with a water tank for guiding the addition of water and an airbag for damping the overall swaying and shaking and blocking the tank inlet to prevent dust from overflowing.

[0006] Furthermore, a base is fixed to the bottom of the frame, and support plates are fixed to both sides of the base. Several sets of positioning holes are linearly opened on the support plates. A lifting plate is fixed to the connecting arm in the middle of the frame. A push sleeve is fixedly connected to the center of the lifting plate. A cylinder is connected to the top of the push sleeve. The cylinder drives the push sleeve to move the connecting arm up and down.

[0007] Furthermore, a connecting box is fixed to one end of the connecting arm, and a sleeve is extended to one end of the connecting box. A first drive motor is located at the center of the sleeve. A rotating arm is connected to the end of the first drive motor away from the sleeve, and a positioning ring is connected to the end of the rotating arm away from the first drive motor.

[0008] Furthermore, the top of the water filling end has a filling pipe, the center of the water filling end has a meter, the bottom of the water filling end is connected to a water tank, and the bottom of the water tank is connected to a water pipe.

[0009] Furthermore, a signal module is installed on the top of the air box, and an air pump electrically connected to the signal module is installed inside the air box. Several sets of air exchange slots are linearly opened on the side of the air box, and an air pipe is connected to the bottom of the air box. The lower end of the air pipe is connected to an air bag.

[0010] Furthermore, a guide tube is fitted onto the top of the cleaning rack, and a second drive motor is connected to the top of the guide tube. Several sets of extension racks are circumferentially fixed to the outer end of the cleaning rack. The extension racks, the cleaning rack, and the guide tube are all equipped with drainage pipes that connect to the water pipes.

[0011] Furthermore, a liquid box is connected to the middle of the extension frame, a pressure pump is installed inside the liquid box, a nozzle is installed on the liquid box, an injector is installed inside the nozzle, and an anti-corrosion sleeve is fitted on the outside of the liquid box.

[0012] Furthermore, the extension rack is connected to a central tube at the end away from the cleaning rack. A spring sleeve is fitted on the outer end of the central tube, and a spring damper is installed inside the spring sleeve. Several branch pipes are circumferentially fixed to the outer end of the central tube. Spray holes are opened at both ends of the branch pipes. A pressure pump is installed inside the central tube. Shower heads are installed at both ends of the central tube. Several sets of shower holes are distributed on the shower heads. Spray grooves are opened on the outside of the branch pipes.

[0013] The beneficial effects are as follows: This utility model realizes lifting, lowering, and horizontal steering operations through the multi-axis rotation of the connecting arm. It is controlled by a second drive motor with the cleaning frame to achieve three-dimensional spatial coverage of the nozzle inside the tank, thoroughly cleaning the blind spots of traditional fixed nozzles such as the back of the stirring shaft and the top of the tank. The spring damping and the design of the water spray channel make the nozzle adaptively fit the curvature of the inner wall of the tank, ensuring that the water flow impact force evenly covers complex surfaces. The pressure pump and the shower hole spray in stages, using high-pressure water flow to impact stubborn stains and low-pressure atomization to cover a large area, thus optimizing water resource utilization. Attached Figure Description

[0014] Figure 1 This is a three-dimensional schematic diagram of a device for cleaning powder from the inner wall of a tank according to the present invention;

[0015] Figure 2 This is a schematic diagram of the frame and connecting arm of this utility model;

[0016] Figure 3 This is a schematic diagram of the positioning ring, water inlet end, and air box of this utility model;

[0017] Figure 4 This is a schematic diagram of the cleaning rack of this utility model;

[0018] Figure 5 This is a schematic diagram of the pipe distribution of this utility model.

[0019] In the attached drawings, the following are the reference numerals: 1. Frame; 2. Connecting arm; 3. Positioning ring; 4. Water inlet end; 5. Air box; 6. Cleaning rack; 101. Base; 102. Support plate; 103. Positioning hole; 104. Lifting plate; 105. Pushing sleeve; 106. Cylinder; 201. Connecting box; 202. First drive motor; 203. Sleeve box; 204. Rotating arm; 401. Meter; 402. Filling pipe; 403. Water tank; 404. 501. Water pipe; 502. Ventilation trough; 503. Signal module; 504. Air pump; 505. Air pipe; 506. Airbag; 607. Second drive motor; 608. Guide tube; 609. Extension frame; 6000. Liquid box; 6001. Spray pipe; 601. Anti-corrosion sleeve; 602. Center pipe; 603. Spring sleeve; 604. Branch pipe; 615. Shower head; 616. Spray hole; 617. Shower hole; 618. Spray trough. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0021] In the fields of chemical engineering, pharmaceuticals, food processing, and new energy materials production, large reaction vessels, mixing tanks, and storage tanks are core production equipment. Over long-term use, the inner walls of these tanks accumulate large amounts of raw material powder, crystals, or reaction residues. For example, lithium cobalt oxide powder used in the production of lithium-ion battery cathode materials easily adheres to the inner walls of tanks; fermentation tanks in the pharmaceutical industry often retain microbial metabolites; and highly corrosive catalyst particles may accumulate on the inner walls of chemical reaction tanks. If these residues are not removed promptly, they will cause multiple problems.

[0022] Cleaning is an essential requirement in highly corrosive environments.

[0023] In lithium battery material production (such as lithium iron phosphate slurry tanks) and chemical reaction vessels, residual metal oxides and acidic catalyst powders (pH≤2) can accelerate tank corrosion. Taking a 316L stainless steel tank as an example, if it is not cleaned in time, the local ion concentration can exceed 500ppm, which can cause pitting corrosion and shorten the tank life by more than 40%.

[0024] Increased Risks of Working in Confined Spaces

[0025] Traditional manual cleaning requires personnel to enter the tank (such as a 1.5m diameter reactor), which carries risks such as asphyxiation (oxygen concentration <19.5%) and explosion (dust concentration >20g / m³). Statistics from the domestic chemical industry in 2024 show that 27% of accidents in confined spaces were directly related to cleaning operations.

[0026] Disadvantages of fixed sprinkler systems

[0027] Fixed nozzle arrays use a water pump to pressurize and spray cleaning fluid, but they suffer from the following technical bottlenecks:

[0028] Large blind spot: The nozzle jet angle is fixed (usually ≤120°), which cannot reach areas such as the back of the stirring shaft and the dome of the tank. The residue removal rate is only 60%-70%.

[0029] Waste of resources: To cover a larger area, the number of sprinklers needs to be increased excessively, resulting in an increase in water consumption of more than 50%.

[0030] Limitations of single-axis rotary cleaning equipment

[0031] A single-axis robotic arm drives the nozzle to swing radially along the tank, but its degrees of freedom are insufficient.

[0032] Two-dimensional planar motion limitations: It cannot cover three-dimensional curved surfaces (such as the bottom of a conical tank), and the cleaning blind spot accounts for about 15%-20%.

[0033] Mechanical damage risk: Collisions between the rigid nozzle and the tank wall can easily cause the inner coating to peel off, increasing annual maintenance costs by 10%-15%.

[0034] The contradiction between cleaning efficiency and resource consumption

[0035] Pharmaceutical companies report that cleaning a 100m³ fermentation tank requires 30 tons of pure water per cycle, and the high-pressure water pump accounts for 15% of the total energy consumption of the production line. Existing equipment struggles to balance cleaning quality with resource costs.

[0036] Safety Hazards: Residual powder mixed with air may form an explosive dust environment (such as aluminum powder, magnesium powder), or react with the metal of the can to release heat, leading to the risk of spontaneous combustion.

[0037] Product quality decline: Cross-contamination between new batches of raw materials and residues affects product purity (e.g., if the deviation rate of active ingredients in a drug exceeds 5%, it must be scrapped).

[0038] Shortened equipment lifespan: Long-term contact of corrosive powders (such as sulfates and chlorides) with stainless steel tanks leads to localized pitting corrosion and stress corrosion cracking, resulting in an average annual reduction of 0.3-0.5 mm in tank wall thickness.

[0039] Environmental compliance pressure: If residual chemicals (such as heavy metal ions) in cleaning wastewater are not properly treated, they may violate the "Industrial Wastewater Discharge Standard" (COD limit 100mg / L).

[0040] Therefore, efficient and thorough cleaning of the tank's inner wall has become a key aspect of industrial equipment maintenance. Traditional manual cleaning (where workers enter the tank to use high-pressure water guns) suffers from low efficiency (each cleaning session takes 4-6 hours), safety hazards (the risk of suffocation in confined spaces), and inconsistent cleanliness (visual inspection blind spots reach 30%), driving technological advancements in automated cleaning equipment.

[0041] Existing equipment generally adopts a "flood irrigation" mode, lacking intelligent control of water pressure and spray pattern. For example, fixed sprinkler systems still use 5MPa high-pressure water flow for lightly polluted areas, resulting in more than 60% water waste; while for stubborn clumps of powder (such as sintered titanium dioxide), the pressure is insufficient to effectively remove them, requiring secondary manual treatment.

[0042] Poor security of device-environment interaction

[0043] Lack of corrosion protection: The nozzle comes into direct contact with the tank metal, which accelerates electrochemical corrosion (especially 304 stainless steel is prone to pitting corrosion in Cl⁻-containing media).

[0044] Dust diffusion out of control: Open cleaning causes dust concentration inside the tank to exceed the limit (>20g / m³), requiring the installation of an additional explosion suppression system, which increases the complexity of the equipment.

[0045] Mechanical damage risk: The collision between the rigid nozzle and the tank wall may cause the inner wall coating (such as the PTFE anti-corrosion layer) to peel off, with repair costs as high as $500 / m².

[0046] Low level of intelligence

[0047] Existing equipment largely relies on preset program control, making it impossible to dynamically adjust cleaning parameters based on the type of stain (such as sticky powder or hard crystalline lumps). For example, a pharmaceutical company reported that when cleaning fermentation tanks (sticky biofilm) and reaction tanks (calcium sulfate crystals) with the same equipment, the pressure and speed need to be manually reset, resulting in a 40% reduction in efficiency.

[0048] Traditional equipment, limited by its motion mechanism design, cannot achieve spherical or spiral coverage with its nozzle trajectory. Taking a cylindrical tank with a diameter of 3m and a height of 5m as an example, the nozzle of a single-axis cleaning device can only cover approximately 75% of the inner surface area. The remaining 25% blind spot is concentrated on the back of the stirring shaft, weld protrusions, and the gas-liquid interface area at the top of the tank. Residue in these areas, if not removed over a long period, can form localized corrosion pits (up to 2-3mm deep), significantly reducing the tank's pressure-bearing capacity.

[0049] like Figures 1-5As shown, a device for cleaning powder from the inner wall of a tank includes a frame 1, a connecting arm 2, and a cleaning frame 6. The frame 1 supports the connecting arm 2 for lifting and lowering operations to maintain stability. The connecting arm 2 is connected to the frame 1 to drive the cleaning frame 6 to rotate and reach the corresponding dead corner inside the tank. The end of the connecting arm 2 away from the frame 1 is connected to the cleaning frame 6, which rotates to clean the powder from the inner wall of the tank. The cleaning frame 6 is equipped with a water tank 403 for guiding the addition of water and an airbag 505 for damping the overall swaying and preventing dust from overflowing from the tank inlet.

[0050] Please see Figures 2-3 In this embodiment, a base 101 is fixedly connected to the bottom of the frame 1, and support plates 102 are fixedly connected to both sides of the base 101. Several sets of positioning holes 103 are linearly opened on the support plates 102. A lifting plate 104 fixedly connected to the connecting arm 2 is provided in the middle of the frame 1. A push sleeve 105 is fixedly connected to the center of the lifting plate 104. A cylinder 106 is connected to the top of the push sleeve 105. The cylinder 106 drives the push sleeve 105 to drive the connecting arm 2 to rise and fall. A connecting box 201 is fixedly connected to one end of the connecting arm 2. A sleeve box 203 is extended to one end of the connecting box 201. A first drive motor 202 is provided in the center of the sleeve box 203. A rotating arm 204 is connected to the end of the first drive motor 202 away from the sleeve box 203. A positioning ring 3 is connected to the end of the rotating arm 204 away from the first drive motor 202.

[0051] Please see Figures 3-4 In this embodiment, the top of the water filling end 4 has a filling pipe 402, the center of the water filling end 4 has a meter 401, the bottom of the water filling end 4 is connected to a water tank 403, the bottom of the water tank 403 is connected to a water pipe 404, the top of the air box 5 has a signal module 502, the air box 5 has an air pressure pump 503 electrically connected to the signal module 502 inside, the side of the air box 5 has several sets of air exchange slots 501 linearly opened, the bottom of the air box 5 is connected to an air pipe 504, and the lower end of the air pipe 504 is connected to an air bag 505.

[0052] Please continue reading. Figures 3-5In this embodiment, a guide tube 602 is sleeved on the top of the cleaning rack 6, and a second drive motor 601 is connected to the top of the guide tube 602. Several sets of extension racks 603 are circumferentially fixed to the outer end of the cleaning rack 6. The extension racks 603, the cleaning rack 6, and the guide tube 602 are all provided with drainage pipes that communicate with the water pipe 404. A liquid box 604 is connected to the middle of the extension rack 603. A pressure pump is provided inside the liquid box 604. A spray pipe 605 is provided on the liquid box 604. An injector is provided inside the spray pipe 605. An anti-corrosion sleeve 6 is sleeved on the outside of the liquid box 604. 06. The extension frame 603 is connected to a central tube 607 at the end away from the cleaning frame 6. A spring sleeve 608 is fitted on the outer end of the central tube 607. The spring sleeve 608 has a spring damping inside. Several branch pipes 609 are circumferentially fixed to the outer end of the central tube 607. Spray holes 611 are opened at both ends of the branch pipes 609. A pressure pump is installed inside the central tube 607. Shower heads 610 are installed at both ends of the central tube 607. Several sets of shower holes 612 are distributed on the shower heads 610. Spray grooves 613 are opened on the outside of the branch pipes 609.

[0053] When encountering a reaction vessel 10 meters high, cylinder 106 drives push sleeve 105 to vertically raise and lower connecting arm 2, covering the longitudinal depth of the vessel. First drive motor 202 drives rotating arm 204 to swing horizontally, combined with second drive motor 601 driving cleaning frame 6 to rotate, forming a spherical motion trajectory that covers the inner wall of the vessel without dead angles. Pressure pump inside liquid box 604 drives nozzle 605 to spray high-pressure water, directly peeling off the caked powder on the back of the stirring shaft. Sprinkler holes 612 at both ends of branch pipe 609 form an atomized water curtain through pressure regulation. The spray nozzle evenly wets the top and curved surfaces of the tank to prevent secondary adhesion of dry powder. The spring sleeve 608 and spring damping buffer the contact force between the nozzle and the tank wall, ensuring that the spray hole 611 always maintains an optimal distance of 5-10mm from the inner wall to avoid mechanical damage. The air bag 505 expands and fits the tank opening after inflation, forming a physical isolation barrier. At the same time, the air exchange groove 501 balances the internal and external air pressure to prevent backflow of cleaning fluid. The signal module 502 monitors the data of the air pressure pump 503 in real time and dynamically adjusts the rotation speed and spray pressure of the cleaning rack 6 to match different types of stains.

[0054] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An apparatus for cleaning powder from the inner wall of a tank, comprising a frame (1); characterized in that: It also includes a connecting arm (2) and a cleaning frame (6), a frame (1) for supporting the connecting arm (2) to maintain stability during lifting and lowering operations, a connecting arm (2) connected to the frame (1) for driving the cleaning frame (6) to rotate to reach the corresponding dead corner inside the tank, a cleaning frame (6) for rotating operation to clean the powder inside the tank at the end of the connecting arm (2) away from the frame (1), and a water tank (403) for guiding the addition of water and an airbag (505) for damping the overall swaying and shaking and blocking the tank inlet to prevent dust from overflowing.

2. The equipment for cleaning powder from the inner wall of a tank according to claim 1, characterized in that, A base (101) is fixedly connected to the bottom of the frame (1). Support plates (102) are fixedly connected to both sides of the base (101). Several sets of positioning holes (103) are linearly opened on the support plates (102). A lifting plate (104) is fixedly connected to the connecting arm (2) in the middle of the frame (1). A push sleeve (105) is fixedly connected to the center of the lifting plate (104). A cylinder (106) is connected to the top of the push sleeve (105). The cylinder (106) drives the push sleeve (105) to drive the connecting arm (2) to rise and fall.

3. The equipment for cleaning powder from the inner wall of a tank according to claim 1, characterized in that, One end of the connecting arm (2) is fixed to a connecting box (201), and one end of the connecting box (201) is extended to a sleeve (203). The center of the sleeve (203) is provided with a first drive motor (202). The end of the first drive motor (202) away from the sleeve (203) is connected to a rotating arm (204), and the end of the rotating arm (204) away from the first drive motor (202) is connected to a positioning ring (3).

4. The equipment for cleaning powder from the inner wall of a tank according to claim 1, characterized in that, The top of the water inlet (4) has a filling pipe (402), the center of the water inlet (4) has a meter (401), the bottom of the water inlet (4) is connected to a water tank (403), and the bottom of the water tank (403) is connected to a water pipe (404).

5. The equipment for cleaning powder from the inner wall of a tank according to claim 1, characterized in that, The top of the air box (5) is provided with a signal module (502), and the air box (5) is provided with a pneumatic pump (503) electrically connected to the signal module (502). Several sets of air exchange slots (501) are linearly opened on the side of the air box (5). The bottom of the air box (5) is connected to an air pipe (504), and the lower end of the air pipe (504) is connected to an air bag (505).

6. The device for cleaning powder from the inner wall of a tank according to claim 4, characterized in that, A guide tube (602) is sleeved on the top of the cleaning rack (6), and a second drive motor (601) is connected to the top of the guide tube (602). Several sets of extension racks (603) are fixedly connected to the outer end of the cleaning rack (6). The extension racks (603), the cleaning rack (6) and the guide tube (602) are all provided with drainage pipes that connect to the water pipe (404).

7. The equipment for cleaning powder from the inner wall of a tank according to claim 6, characterized in that, The extension frame (603) is connected to a liquid box (604) in the middle. The liquid box (604) is equipped with a pressure pump. The liquid box (604) is equipped with a nozzle (605). The nozzle (605) is equipped with an injector.

8. The apparatus for cleaning powder from the inner wall of a tank according to claim 6, characterized in that, The extension frame (603) is connected to a central tube (607) at the end away from the cleaning frame (6). A spring sleeve (608) is fitted on the outer end of the central tube (607). A spring damper is provided inside the spring sleeve (608). Several branch pipes (609) are fixedly connected to the outer end of the central tube (607) in a circumferential manner. Spray holes (611) are opened at both ends of the branch pipes (609). A pressure pump is provided inside the central tube (607). Shower heads (610) are provided at both ends of the central tube (607). Several sets of shower holes (612) are distributed on the shower heads (610). Spray grooves (613) are opened on the outside of the branch pipes (609).

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