A clean-out free storage bin

Abstract

The utility model relates to material storage equipment technical field, and disclose a kind of cleaning type storage silo exempt from entering, including warehouse body and the discharge mechanism of setting in the lower part of warehouse body, further include built-in pneumatic cleaning device, it includes: fixedly set in the air path distribution structure of the upper portion of warehouse body;Multiple jet unit distributed along the circumference of warehouse body, each the jet unit all has a jet port that penetrates silo wall and with the internal communication of warehouse body, and with the internal communication of air path distribution structure;Control valve group, set on the air path between air path distribution structure and the jet unit. The utility model is cleaned by built-in pneumatic, realize exempt from entering automatic cleaning, completely eliminate the safety and health risk of personnel into silo, pulse jet and oblique jet design enhance cleaning effect, circumferential distribution's jet unit covers global no dead angle, controller automatically controls time sequence and parameter, cleaning efficiency is high, time is short.

Description

Technical Field

[0001] This utility model relates to the field of material storage equipment technology, specifically a non-warehouse cleaning type storage silo. Background Technology

[0002] Stainless steel storage silos are widely used in industries such as chemical, food, pharmaceutical, and plastics processing to store powdery or granular materials. Dust is easily generated during loading, unloading, and transportation of materials (especially plastic particles). This dust readily adheres to the inner walls of the silo, and traditional cleaning methods have the following drawbacks: 1. High safety risks: Cleaning requires personnel to enter the warehouse, which is a confined space operation. Complex work permits must be obtained, and ventilation, detection, and monitoring measures must be provided. The process is cumbersome and there are safety hazards such as suffocation, poisoning, and dust explosion. 2. Significant health hazards: Residual dust inside the warehouse (such as plastic dust) poses a potential hazard to the human respiratory system, and the risk of exposure is high during manual cleaning; 3. Poor cleaning effect: Manual cleaning with an air gun has blind spots and physical limitations, resulting in uneven cleaning and easy residue in dead corners, which affects the purity and quality of batch materials; 4. Low efficiency and equipment damage: Manual cleaning is time-consuming and labor-intensive, affecting production continuity. Frequent warehousing may also scratch the high-gloss stainless steel silo walls, affecting the purity of subsequent materials and accelerating equipment wear and tear.

[0003] Therefore, developing a storage silo that can automatically, thoroughly, and safely clean its inner walls without requiring personnel to enter is a problem that the industry urgently needs to solve. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing storage silos, such as high safety risks, significant health hazards, incomplete cleaning, and low efficiency, which rely on manual cleaning. It provides an integrated built-in automatic pneumatic cleaning system that can achieve efficient and thorough cleaning of storage silos without manual intervention.

[0005] This utility model proposes a non-entry cleaning type storage silo, including a silo body and a discharge mechanism disposed at the lower part of the silo body, and also includes a built-in pneumatic cleaning device, which includes: An air distribution structure fixedly installed on the upper part of the chamber body; Multiple jet units are distributed circumferentially along the chamber body. Each jet unit has a jet port that penetrates the chamber wall and communicates with the interior of the chamber body, and is also connected to the interior of the air distribution structure. A control valve assembly is disposed in the air path between the air path distribution structure and the jet unit; The controller, electrically connected to the control valve assembly, is configured to, in cleaning mode, control the control valve assembly to eject compressed gas from each of the jet nozzles to clean the inner wall of the chamber.

[0006] The air distribution structure can adopt a ring-shaped air pipe, a polygonal branch pipe or a star-shaped air collection pipe. The jet unit includes components such as jet pipe and jet nozzle. The control valve group can be composed of solenoid valves, pneumatic valves, etc. The controller is preferably a PLC controller. Built-in pneumatic cleaning eliminates the need for personnel to enter the storage area, fundamentally eliminating safety and health risks. The air distribution structure ensures uniform distribution of compressed gas, and the circumferentially distributed jet units cover the entire storage wall, leaving no blind spots. The controller automatically controls the jet process without manual intervention, significantly improving cleaning efficiency. Non-contact cleaning avoids scratches on the storage wall and ensures the purity of stored materials.

[0007] As a further optimization of this utility model, the controller is configured to control the control valve group so that compressed gas is ejected from each of the jet ports in a pulse form; Pulse control can be achieved by setting the opening and closing frequency of the solenoid valve. The pulse width is 0.1-0.5s, the pulse interval is 0.5-2s, and the compressed gas pressure can be set to 0.4-0.8MPa. Pulse jetting generates stronger impact and shearing forces, which can quickly peel off adhering dust and materials. The cleaning effect is better than continuous jetting. The pulse parameters can be flexibly adjusted by the controller to adapt to materials with different degrees of adhesion, while saving compressed gas consumption and reducing energy consumption.

[0008] As a further optimization of this utility model, the gas distribution structure is a ring, polygonal or star-shaped pipeline structure; The ring-shaped pipeline is adapted to the circular chamber, ensuring uniform circumferential air supply; Polygonal piping is suitable for square or polygonal silos; The star-shaped pipeline connects to multiple branch pipes through the central gas collection section, making it suitable for large-diameter chambers; Multiple pipeline structures are available to accommodate chambers of different shapes and sizes, ensuring consistent air supply pressure for each jet unit. The compact structure allows for installation on the upper part of the chamber without taking up storage space, and the modular design facilitates maintenance and replacement.

[0009] As a further optimization of this utility model, the axis of the jet nozzle forms an acute angle with the vertical direction, so that the ejected gas impacts the inner wall of the chamber obliquely. The air jet can be made up of an inclined nozzle, and the included angle can be adjusted by the nozzle installation angle. The nozzle can be a flat nozzle, a conical nozzle, etc. The oblique jet expands the impact coverage area, and the airflow flows downward along the bin wall, causing the stripped material to fall, improving cleaning efficiency, avoiding airflow rebound caused by vertical jet, reducing dust flying, and effectively controlling dust diffusion when combined with a dust extraction device. Furthermore, the acute angle is between 30 and 60 degrees, balancing impact force and coverage. It can be finely adjusted according to the diameter of the bin and the adhesion characteristics of the material, adapting to the cleaning needs of most powder and granular materials.

[0010] As a further optimization of this utility model, the control valve group includes multiple solenoid valves that independently control the air path of one of the jet units. The solenoid valves are either two-position five-way solenoid valves or three-way solenoid valves, which have a fast response speed. Each solenoid valve corresponds to one jet unit and is connected to the controller via wires. Independent solenoid valves enable individual control of each jet unit, allowing for flexible selection of simultaneous jetting of the entire chamber or jetting in different zones. The solenoid valves respond quickly, ensuring precise control of pulse jetting. The structure is simple, the failure rate is low, and it is compatible with automated cleaning processes.

[0011] As a further optimization of this utility model, the controller is configured to control each jet unit to perform pulse jetting sequentially or in groups according to a preset timing and / or order; The timing control can be set to spray jets clockwise or counterclockwise sequentially, or to spray jets in upper and lower partitions or symmetrical groups. The controller has a built-in control program, and the timing parameters can be modified via the touch screen. Ordered pulse jets create airflow waves, enhancing material stripping while reducing airflow turbulence within the chamber and minimizing dust emissions. Group control allows for targeted cleaning of heavily adhered areas, improving cleaning precision and efficiency while saving energy.

[0012] As a further optimization of this utility model, the upper part of the silo is also provided with a dust suction interface. The dust suction interface is a flange interface or a quick-connect interface, which can be connected to dust removal pipes, negative pressure fans and other equipment. A filter screen can be installed at the interface to prevent material particles from entering the dust removal system. Dust generated during the cleaning process is promptly removed through the dust extraction interface, preventing secondary adhesion or diffusion of dust outside the storage area and ensuring a clean working environment. Combined with pneumatic cleaning, this forms a synergistic mechanism of "air jet stripping + dust extraction," improving both cleaning effectiveness and environmental friendliness.

[0013] As a further optimization of this utility model, the air distribution structure and the jet unit are installed on the outside of the chamber body by detachable fasteners, including bolts, clamps, flanges, etc. The air distribution structure can be fixed to the outer wall of the chamber body by a bracket, and the jet unit is connected to the chamber body by threads or ferrules. The external installation method facilitates the inspection and replacement of the air distribution structure and jet unit without the need to enter the silo; the detachable design is compatible with the upgrading and transformation of existing storage silos, making it highly versatile and reducing equipment investment costs.

[0014] As a further optimization of this utility model, the chamber body is a stainless steel chamber body, and the inner wall has a mirror polished surface. The stainless steel chamber body is preferably made of 304 or 316L stainless steel, and the roughness of the mirror polished surface Ra≤0.4μm is achieved by mechanical polishing process. Made of stainless steel, it is corrosion-resistant and pollution-free, making it suitable for the material storage needs of industries such as food and pharmaceuticals. The mirror-polished inner wall reduces material adhesion and lowers the difficulty of cleaning. With the help of a pneumatic cleaning device, the cleaning residue rate can be reduced to an extremely low level (≤0.01%), ensuring the purity of material batches.

[0015] The non-warehousing and cleaning-type storage silo proposed in this utility model has the following beneficial effects: (i) It completely avoids personnel entering confined spaces for work, fundamentally eliminating safety and occupational health risks such as suffocation, poisoning, and dust exposure, and eliminates the need for complicated entry procedures. (ii) By using multi-point pulse jets evenly distributed around the circumference of the silo, it can cover most of the silo wall area, especially the top and upper areas that are difficult to clean manually. The pulse airflow has stronger impact and shearing force, which can effectively peel off the adhering materials, resulting in a very low cleaning residue rate (≤0.01%) and a significantly shortened cleaning time (≤3 minutes). (iii) The clearance process is automatically controlled by the controller and can be completed with one click without manual intervention, saving a lot of manpower and time costs and improving equipment turnover and production efficiency; (iv) The non-contact pneumatic cleaning method avoids physical contact between the tools and the bin wall, effectively preventing scratches on the inner wall of the bin (especially the stainless steel surface), maintaining the smoothness of the bin wall, and helping to ensure the purity of the subsequently stored materials. (v) The air distribution structure and jet unit can be integrated into the upper part of the chamber, with a compact structure that does not occupy extra space. The modular design facilitates installation, disassembly and maintenance.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] Figure 1 This is a cross-sectional structural diagram of the present invention; Figure 2 This utility model Figure 1 Enlarged structural diagram of the upper part of the central compartment; Figure 3 This is a top view of the multi-point pulse component of this utility model.

[0018] Attached Figure Descriptions: 1. Bin body; 2. Conical hopper; 3. Discharge pipe; 4. Discharge valve; 5. Inlet; 6. Dust suction interface; 7. Multi-point pulse assembly; 71. Annular air pipe; 72. Air jet pipe; 73. Air inlet pipe; 74. Solenoid valve; 8. Air jet port; 9. Exhaust pipe; 10. One-way valve; 11. Dust filter; 12. Clamp. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0020] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0021] Example 1 Please see Figures 1-3 The present invention proposes a non-entry cleaning storage silo, which includes a silo body 1. An integrated conical hopper 2 is installed at the lower end of the silo body 1. Multiple evenly distributed discharge pipes 3 are installed at the bottom of the conical hopper 2, and each discharge pipe 3 is equipped with a discharge valve 4. The discharge valve 4 is preferably a pneumatic butterfly valve. The upper side wall of the silo body 1 has a feed inlet 5 and a dust suction interface 6. The material enters the silo body 1 through the feed inlet 5 and falls naturally. The dust raised is extracted through the dust suction interface 6 and transferred to the dust removal system. Specifically, a multi-point pulse assembly 7 is installed at the upper end of the chamber 1. The multi-point pulse assembly 7 includes an annular air pipe 71 that is detachably installed at the upper end of the chamber 1. Twelve jet pipes 72 are evenly distributed around the inner circle of the annular air pipe 71, and four air inlet pipes 73 are evenly distributed around the outer circle of the annular air pipe 71. A jet port 8 connected to the free end of the jet pipe 72 is opened at the corresponding position on the upper side wall of the chamber 1. The free ends of the multiple air inlet pipes 73 are connected to the compressed air source equipment through a distribution valve and an air supply pipe. A solenoid valve 74 is also installed on the jet pipe 72 between the inner circle of the annular air pipe 71 and the outer wall of the chamber 1, and the solenoid valve 74 is connected to the PLC controller. In cleaning mode, all discharge valves 4 are opened via the PLC controller to discharge materials. Simultaneously, multiple solenoid valves 74 are opened and closed sequentially according to a set time sequence. Compressed air is sprayed at high speed from multiple jet nozzles 8 in the form of pulse waves onto the inner wall of the chamber 1, instantly peeling off the plastic particles adhering to the inner wall. The peeled particles are discharged downwards under the action of gravity and airflow, while the dust enters the dust removal system through the dust suction port 6. The entire process does not require personnel to enter the chamber, the cleaning time is ≤3 minutes, and the residue rate is ≤0.01%. It should be noted that the compressed air source equipment provides an air supply pressure of 0.4MPa to 0.8MPa, a pulse width of 0.1s to 0.5s, and a pulse interval of 0.5s to 2s, which are adjusted by the PLC controller.

[0022] Example 2 It illustrates yet another embodiment of the invention based on Embodiment 1; The jet nozzle 8 is inclined and faces the inner wall of the chamber 1. The angle α between the axis of the jet nozzle 8 and the vertical direction is controlled between 30° and 60°, preferably 60°.

[0023] Example 3 It illustrates yet another embodiment of the invention based on Embodiment 1; like Figure 2 As shown, an exhaust pipe 9 is installed at the upper end of the chamber 1. A one-way valve 10 is installed at one end of the exhaust pipe 9, and a dust filter 11 located inside the chamber 1 is installed at the other end of the exhaust pipe 9. The dust filter 11 is a conventional filter element that can filter dust in the exhaust air and prevent dust from being released.

[0024] Example 4 It illustrates yet another embodiment of the invention based on Embodiment 1; like Figure 1 and Figure 2As shown, the upper end of the chamber 1 is frustum-shaped. The annular air pipe 71 is fitted from top to bottom onto the outer circle of the upper end of the chamber 1. The installation is pre-positioned by the inclined surface. A clamp 12 is also installed on the upper end face of the annular air pipe 71. The clamp 12 is fitted onto the outer circle of the upper end of the chamber 1 and locked by bolts. At this time, the jet pipe 72 is connected to the jet port 8. A sealing ring or sealing element is also provided at the connection point for sealing treatment.

[0025] Example 5 It illustrates yet another embodiment of the invention based on Embodiment 1; The inner wall of chamber 1 is mirror polished, with a surface roughness Ra≤0.4μm.

[0026] In summary, this utility model achieves automatic cleaning without personnel entering the storage area through built-in pneumatic cleaning, completely eliminating the safety and health risks associated with personnel entering the storage area. The pulse jet and oblique jet design enhance the cleaning effect, and the circumferentially distributed jet units cover the entire area without dead angles. The controller automatically controls the timing and parameters, resulting in high cleaning efficiency and short cleaning time. The stainless steel mirror-finish storage wall and dust extraction interface work together to reduce material adhesion and dust pollution. The detachable installation design allows for upgrades and modifications, making it highly versatile. Moreover, the overall structure is compact and easy to maintain, effectively ensuring the purity of stored materials and the continuity of production. It is suitable for multiple fields such as chemical, food, and plastic processing.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A non-warehousing cleaning type storage silo, comprising a silo body and a discharge mechanism disposed at the bottom of the silo body, characterized in that, Also includes: Built-in pneumatic cleaning device, comprising: An air distribution structure fixedly installed on the upper part of the chamber body; Multiple jet units are distributed circumferentially along the chamber body. Each jet unit has a jet port that penetrates the chamber wall and communicates with the interior of the chamber body, and is also connected to the interior of the air distribution structure. A control valve assembly is disposed in the air path between the air path distribution structure and the jet unit; The controller, electrically connected to the control valve assembly, is configured to, in cleaning mode, control the control valve assembly to eject compressed gas from each of the jet nozzles to clean the inner wall of the chamber.

2. The non-warehousing and cleaning storage silo according to claim 1, characterized in that, The controller is configured to control the control valve assembly to cause compressed gas to be ejected from each of the jet nozzles in a pulsed manner.

3. The non-warehousing and cleaning storage silo according to claim 1 or 2, characterized in that, The gas distribution structure is a ring, polygon, or star-shaped pipeline structure.

4. The non-warehousing and cleaning storage silo according to claim 1 or 2, characterized in that, The axis of the jet nozzle forms an acute angle with the vertical direction, causing the ejected gas to impact the inner wall of the chamber at an angle.

5. The non-warehousing and cleaning storage silo according to claim 4, characterized in that, The acute angle is between 30 and 60 degrees.

6. The non-warehousing and cleaning storage silo according to claim 1 or 2, characterized in that, The control valve group includes multiple solenoid valves that each independently controls the air path of one of the jet units.

7. The non-warehousing and cleaning storage silo according to claim 6, characterized in that, The controller is configured to control each jet unit to pulse jet sequentially or in groups according to a preset timing and / or order.

8. The non-warehousing and cleaning storage silo according to claim 1, characterized in that, The upper part of the chamber is also equipped with a dust extraction port.

9. The non-warehousing and cleaning storage silo according to claim 1, characterized in that, The air distribution structure and jet unit are mounted to the outside of the chamber via detachable fasteners.

10. The non-warehousing and cleaning storage silo according to claim 1, characterized in that, The chamber is a chamber with an inner wall that has a mirror-polished surface.

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