An abrasive blast cleaning system for cleaning strip material

Abstract

The application discloses a kind of abrasive injection cleaning systems for cleaning plate strip, including a plurality of injection cleaning devices designed according to the width of plate strip, and the number of plurality of injection cleaning devices is even configuration, the plurality of injection cleaning devices of even configuration is divided into n groups of adjacent two injection cleaning devices, n≥1, each group of adjacent two injection cleaning devices includes first injection cleaning device and second injection cleaning device adjacent along the direction of plate strip conveying, the first injection cleaning device includes first abrasive tank and first cleaning device, the second injection cleaning device includes second abrasive tank and second cleaning device, and an abrasive circulating conveying device is arranged between the first injection cleaning device and the second injection cleaning device.The application realizes that abrasive can flow between two injection cleaning devices, significantly improves the balance of abrasive between each abrasive tank.

Description

Technical Field

[0001] This invention belongs to the field of surface cleaning of metal sheets and strips, and particularly relates to an abrasive blasting cleaning system. Background Technology

[0002] Wet shot blasting processes, such as abrasive water jetting or wet shot blasting, developed from existing dry shot blasting processes, can not only effectively remove the oxide layer on the surface of metal sheets and strips but also significantly reduce environmental pollution. In this process, existing systems typically use a horizontal conveying method to feed the sheet or strip into a cleaning tank, where a mixture of water and abrasive is sprayed from nozzles or blasting heads to clean its surface. A collection hopper is located at the bottom of the cleaning tank, and an abrasive storage device is installed above it. The storage device conveys the abrasive from top to bottom to the nozzles or blasting heads for spraying. Used abrasive collects under gravity in the bottom collection hopper, and is then lifted and transported back to the storage device, thus forming a continuous closed-loop abrasive circulation system.

[0003] Typically, due to the large width of the strip material, more cleaning nozzles are needed to cover the entire width, resulting in a significant increase in the abrasive circulation volume per unit time. This places higher demands on the flow rate and stability of the abrasive conveying system. To balance the rationality of the cleaning nozzle arrangement, reduce the impact of abrasive splashing, and effectively wash away residual abrasive on the strip surface, multiple sets of cleaning nozzles need to be installed along the strip conveying direction to clean different width areas of the strip material.

[0004] However, in actual operation, because each set of cleaning nozzles is equipped with an independent abrasive circulation device, the abrasive from upstream is easily lost downstream due to rinsing and abrasive splashing as the strip is horizontally conveyed. This not only causes insufficient upstream abrasive replenishment, affecting the cleaning effect, but also easily leads to local accumulation in the downstream area. In addition, the uneven distribution of abrasive among the cleaning nozzles causes fluctuations in the jet impact force, further exacerbating the inconsistency in the surface treatment quality of the strip. How to continuously and stably maintain the abrasive balance among the various abrasive tanks, thereby continuously ensuring the stability of the surface treatment quality of the strip, has been a long-standing technical challenge for those skilled in the art. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies and defects mentioned in the background art above, and to provide an abrasive blasting cleaning system for cleaning strips and plates that is suitable for wet blasting processes, has high conveying efficiency, low circulating water requirements, balanced abrasive supply among various blasting cleaning devices, and stable surface treatment quality of strips and plates.

[0006] To solve the above-mentioned technical problems, the technical solution proposed by this invention is as follows:

[0007] An abrasive blasting cleaning system for cleaning strip and sheet materials includes multiple blasting cleaning devices designed according to the width of the strip and sheet material, with an even number of blasting cleaning devices configured. The even number of blasting cleaning devices are divided into n groups of two adjacent blasting cleaning devices, where n≥1. Each group of two adjacent blasting cleaning devices includes a first blasting cleaning device and a second blasting cleaning device that are adjacent along the conveying direction of the strip and sheet material. The first blasting cleaning device includes a first abrasive tank and a first cleaning device that are interconnected. The second blasting cleaning device includes a second abrasive tank and a second cleaning device that are interconnected. An abrasive circulation conveying device is provided between the first blasting cleaning device and the second blasting cleaning device. The abrasive circulation conveying device includes a first conveying device for conveying the abrasive sprayed from the first cleaning device to the second abrasive tank, and a second conveying device for conveying the abrasive sprayed from the second cleaning device to the first abrasive tank.

[0008] In the aforementioned abrasive blasting cleaning system, preferably, the first conveying device includes a first collecting hopper for collecting the abrasive sprayed from the first cleaning device, and a first conveying assembly for conveying the abrasive from the first collecting hopper upwards to the second abrasive tank. The second conveying device includes a second collecting hopper for collecting the abrasive sprayed from the second cleaning device, and a second conveying assembly for conveying the abrasive from the second collecting hopper upwards to the first abrasive tank. The outlet of the first collecting hopper is located at the lower inlet of the first conveying assembly, and the second abrasive tank is located at the higher outlet of the first conveying assembly. In this setup, the abrasive from the first abrasive tank is transported to the first cleaning device. The abrasive is sprayed out by the high-pressure water flow through the first cleaning device to clean the strip and plate. It then falls into the first collection hopper and is transported to the second abrasive tank via the first conveying assembly. The abrasive from the second abrasive tank is transported to the second cleaning device. The sprayed abrasive falls into the second collection hopper and is transported back to the first abrasive tank via the second conveying assembly, thus forming an abrasive cycle. The downstream abrasive can be actively returned to the upstream first cleaning device, thereby achieving a balanced cycle of abrasive supply between the first and second cleaning devices through its own physical structure, transforming the existing passive remediation into autonomous adjustment.

[0009] In the above-mentioned abrasive blasting cleaning system, preferably, the first conveying component includes a first partition conveyor belt, and the second conveying component includes a second partition conveyor belt. The conveying direction of the first partition conveyor belt is linearly inclined upward and consistent with the conveying direction of the strip material. The conveying direction of the second partition conveyor belt is linearly inclined upward and opposite to the conveying direction of the strip material. The first partition conveyor belt and the second partition conveyor belt are respectively arranged on both sides of the strip material. The conveying assembly adopts a partitioned conveyor belt. Compared with the existing hydraulic conveying method, its partition structure is a mechanical conveying method, which does not rely on a large amount of circulating water, significantly reducing energy and water consumption. At the same time, the mechanical conveying method directly improves the abrasive conveying efficiency and avoids the disadvantages of low hydraulic conveying efficiency. It eliminates the need to set up multiple collection buckets at the bottom of the tank for simultaneous hydraulic conveying, thus ensuring the circulation volume of abrasive. Its belt structure completely changes the problems of difficult shoveling and easy loss of abrasive from the gaps between buckets in the existing chain bucket device, ensuring efficient recovery of abrasive and timely return to participate in the circulation. The abrasive circulation conveying is efficient, energy-saving, and stable. In addition, the inclined upward conveying method completes the lifting process from the bottom collection point to the top abrasive tank while horizontally conveying abrasive. The two conveyor belts convey in opposite directions and are arranged on both sides of the strip material, with a clear circulation path. It makes full use of the idle space on both sides of the production line, ensuring the circulation conveying of abrasive and minimizing the need for additional conveying devices. The system structure is more compact and reasonable.

[0010] In the aforementioned abrasive blasting cleaning system, preferably, the first conveying assembly further includes a first re-collection assembly for collecting abrasive overflowing from the lower inlet of the first partition conveyor belt, and the second conveying assembly further includes a second re-collection assembly for collecting abrasive overflowing from the lower inlet of the second partition conveyor belt. By combining the re-collection assembly with the partition conveyor belt, the abrasive conveying efficiency is further improved. When the abrasive in the collection hopper falls onto the partition conveyor belt, it easily overflows. The re-collection assembly can collect the overflowing abrasive, thereby reducing abrasive loss and further ensuring abrasive conveying efficiency.

[0011] In the aforementioned abrasive blasting cleaning system, preferably, the first recollection assembly includes a first recollection hopper located below the lower inlet of the first partition conveyor belt, and a first jet pump for conveying the abrasive from the first recollection hopper to the second abrasive tank. The second recollection assembly includes a second recollection hopper located below the lower inlet of the second partition conveyor belt, and a second jet pump for conveying the abrasive from the second recollection hopper to the first abrasive tank. With this configuration, abrasive overflowing from the partition conveyor belt can directly roll into the lower recollection hopper. When the abrasive accumulates to a certain level, it can be conveyed to the abrasive tank on the same side by the jet pump, reducing abrasive loss during circulation and ensuring efficient abrasive circulation through hydraulic conveying assistance.

[0012] In the aforementioned abrasive blasting cleaning system, preferably, the high-end output port of the first partition conveyor belt is provided with a first flushing component for flushing the abrasive from the overturned portion of the first partition conveyor belt to the lower second abrasive tank, and the high-end output port of the second partition conveyor belt is provided with a second flushing component for flushing the abrasive from the overturned portion of the second partition conveyor belt to the lower first abrasive tank. Since the partition conveyor belt needs to be overturned at its high end, wet abrasive will adhere to the gaps between the partitions or the belt surface due to its adhesive properties, and cannot be completely removed by its own weight. The water flow impact force provided by the flushing components can forcibly flush these residual abrasives into the lower abrasive tank, further ensuring the efficient and reliable conveying and circulation of the abrasive.

[0013] In the aforementioned abrasive blasting cleaning system, preferably, the first partition conveyor belt and the second partition conveyor belt are respectively surrounded by a first conveyor box and a second conveyor box. The conveyor boxes can completely prevent abrasive from splashing and overflowing in all directions. At the same time, in conjunction with the recollection component, the abrasive splashed in the conveyor boxes is recovered, further improving the abrasive recovery rate. They can also shield dust, isolate external interference, ensure a clean working environment, and enhance the stability and safety of system operation.

[0014] In the aforementioned abrasive blasting cleaning system, preferably, the first cleaning device includes a first nozzle group composed of multiple first nozzles, and a first conveying pipe connecting the first nozzle group and the first abrasive tank. The multiple first nozzles are arranged in a gradient inclined manner along the strip conveying direction, and the spraying direction of the first nozzles is perpendicular to the strip conveying direction and faces the side of the first partition conveyor belt. The second cleaning device includes a second nozzle group composed of multiple second nozzles, and a second conveying pipe connecting the second nozzle group and the second abrasive tank. The multiple second nozzles are arranged in a gradient inclined manner along the strip conveying direction, and the spraying direction of the second nozzles is perpendicular to the strip conveying direction and faces the side of the second partition conveyor belt. By setting the first and second nozzles at a gradient angle, the nozzles that start working first are positioned closest to the edge of the strip. The nozzles then move further away from the edge of the strip according to their cleaning sequence. This prevents abrasive residue from the first nozzle from remaining on the strip surface and affecting the cleaning process. Furthermore, because the high-speed jetting direction of both the first and second nozzles is opposite to the first delivery pipe, the abrasive is always jetted away from the delivery pipe. This fundamentally avoids the risk of abrasive splashing and backflow causing damage to pipes and equipment, significantly reducing the failure rate of related equipment and lowering maintenance costs.

[0015] In the above-described abrasive blasting cleaning system, preferably, the first collecting hopper is located below the first nozzle assembly. The first collecting hopper includes a tapered first opening and a first flow channel communicating with the first opening. The first opening is located below the spraying side of the first nozzle, and the outlet of the first flow channel is located above the low-end inlet of the first partition conveyor belt. The second collecting hopper is located below the second nozzle assembly. The second collecting hopper includes a tapered second opening and a second flow channel communicating with the second opening. The second opening is located below the spraying side of the second nozzle, and the outlet of the second flow channel is located above the low-end inlet of the second partition conveyor belt. In this configuration, the flow channel connecting the converging nozzles serves as a guide channel, smoothly guiding the abrasive gathered at the converging nozzles to the inlet of the conveyor belt. Because the first nozzle sprays towards the side of the first partition conveyor belt, most of the abrasive slides down the strip material closer to the first partition conveyor belt. The first converging nozzle is located directly below this side, allowing the abrasive to be quickly collected and transported onto the first partition conveyor belt. Similarly, the second nozzle sprays towards the side of the second partition conveyor belt, causing most of the abrasive to slide down the strip material closer to the second partition conveyor belt. The second converging nozzle is located directly below this side, allowing the abrasive to be quickly collected and transported onto the second partition conveyor belt. This significantly shortens the single cycle time, improves the abrasive circulation efficiency, and ensures the uniformity of abrasive among the abrasive tanks.

[0016] In the aforementioned abrasive blasting cleaning system, preferably, it includes N cleaning boxes, with an even number of cleaning boxes. Each cleaning box contains one blasting cleaning device. The width of the strip is D, and the cleaning width of each blasting cleaning device is d = D / N, with the cleaning width of each blasting cleaning device ranging from 540 to 1080 mm. This configuration allows the wide strip to be divided into N independent cleaning zones based on its width. By setting an even number of cleaning boxes, an abrasive circulation can be formed between any two adjacent cleaning boxes, ensuring the uniformity of abrasive between the abrasive containers and thus guaranteeing the consistency of strip material quality across different width zones.

[0017] In the aforementioned abrasive blasting cleaning system, preferably, the first nozzle group includes a plurality of first nozzles symmetrically arranged on the upper and lower sides of the strip, with the plurality of first nozzles arranged in a gradient inclined manner from the side closest to the first partition conveyor belt towards the middle of the strip along the strip conveying direction. The second nozzle group includes a plurality of second nozzles symmetrically arranged on the upper and lower sides of the strip, with the plurality of second nozzles arranged in a gradient inclined manner from the other side towards the middle of the strip along the strip conveying direction. This nozzle arrangement ensures that the cleaning of the entire width of the strip is covered, while simultaneously cleaning its upper and lower surfaces.

[0018] Preferably, the above-mentioned abrasive blasting cleaning system includes a cleaning box, within which are a first cleaning device and a second cleaning device. The first and second collection hoppers are adjacent to each other below the first and second cleaning devices, respectively. The cleaning width of both the first and second cleaning devices covers the width of the strip material. This arrangement, when cleaning strip materials with narrow widths, ensures self-circulation within the cleaning box when the cleaning width of a single blasting cleaning device is sufficient to cover the strip width, preventing abrasive accumulation at the output end of the cleaning box and improving abrasive circulation efficiency. Furthermore, the single cleaning box is equipped with two abrasive tanks, supporting a more abundant abrasive supply and the arrangement of more blasting units.

[0019] In the aforementioned abrasive blasting cleaning system, preferably, the first nozzle group includes multiple first nozzles disposed on the upper or lower side of the strip, and the second nozzle group includes multiple second nozzles correspondingly disposed on the other side of the strip. The multiple first nozzles and multiple second nozzles are arranged in a gradient inclined pattern from one side of the strip to the other along the strip conveying direction. This arrangement allows for circulation between the staggered upper and lower nozzles within the cleaning chamber, ensuring the uniformity of abrasive between the first and second nozzles, while preventing abrasive accumulation in a certain area and improving abrasive circulation efficiency.

[0020] Compared with the prior art, the advantages of the present invention are as follows:

[0021] This invention, by setting an even number of spray cleaning devices and incorporating an abrasive circulation conveying device between adjacent spray cleaning devices, enables the abrasive to flow between the two spray cleaning devices during the horizontal conveying and cleaning of strip materials. This effectively overcomes the problem of uneven abrasive supply between upstream and downstream spray cleaning devices caused by abrasive loss and accumulation downstream. It significantly improves the abrasive balance of each spray cleaning device, as well as the stability and efficiency of abrasive circulation. Compared to traditional methods that require separate adjustment or centralized distribution of multiple abrasive tanks, the dedicated circulation of adjacent two spray cleaning devices does not require the configuration of diversion and merging mechanisms or complex control systems, and can autonomously achieve abrasive balance. This continuously ensures the stability of the surface treatment quality of the strip materials. The entire cleaning system has a simple structure, short circulation path, more efficient abrasive conveying, faster abrasive replenishment response, more stable spray impact force, and lower equipment investment costs. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of the abrasive jet cleaning system for cleaning strips and plates, as described in Example 1.

[0024] Figure 2 This is a schematic diagram of the abrasive blasting cleaning system for cleaning strips and plates in Example 1 (excluding the water circulation component).

[0025] Figure 3 This is a left perspective view of the abrasive blasting cleaning system for cleaning sheet and strip materials according to Example 1.

[0026] Figure 4 This is a right perspective view of the abrasive blasting cleaning system for cleaning sheet and strip materials according to Example 1.

[0027] Figure 5 This is a schematic diagram of the overall structure of the abrasive jet cleaning system for cleaning strips and plates in Example 2.

[0028] Figure 6 This is a left perspective view of the abrasive blasting cleaning system for cleaning sheet and strip materials in Example 2.

[0029] Figure 7 This is a right perspective view of the abrasive blasting cleaning system for cleaning sheet and strip materials in Example 2.

[0030] Legend

[0031] 01. Steel plate; 1. First conveying device; 11. First collecting hopper; 111. First converging point; 112. First flow channel; 12. First conveying assembly; 121. First partition conveyor belt; 122. First recollection hopper; 123. First flushing component; 124. First conveying box; 2. Second conveying device; 21. Second collecting hopper; 211. Second converging point; 212. Second flow channel; 22. Second conveying assembly; 221. Second partition conveyor belt; 222. Second recollection hopper; 223. Second flushing component; 224. Second conveying box; 3. First spray cleaning device; 31. First abrasive tank; 311. 32. First cleaning device; 321. First nozzle; 322. First conveying pipe; 4. Second spray cleaning device; 41. Second abrasive tank; 411. Second drum screen; 42. Second cleaning device; 421. Second nozzle; 422. Second conveying pipe; 5. Cleaning box; 51. First box body; 52. Second box body; 6. Shot blasting assembly; 7. Overflow collection assembly; 71. Overflow port; 72. Overflow abrasive collection hopper; 8. Water circulation assembly; 81. Sewage sedimentation tank; 82. Sewage filter; 83. Shot blasting water supply pump; 84. Jet pump water supply pump; 85. Nozzle water supply pump; 9. Abrasive tank support leg. Detailed Implementation

[0032] To facilitate understanding of the present invention, the present invention will be described more fully and in detail below with reference to the accompanying drawings and preferred embodiments, but the scope of protection of the present invention is not limited to the following specific embodiments.

[0033] It should be noted that when a component is described as being "fixed to, attached to, connected to or connected to" another component, it can be directly fixed to, attached to, connected to or connected to the other component, or it can be indirectly fixed to, attached to, connected to or connected to the other component through other intermediate connectors.

[0034] Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by those skilled in the art. The technical terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the scope of the invention.

[0035] Unless otherwise specified, all raw materials, reagents, instruments and equipment used in this invention can be purchased from the market or prepared by existing methods.

[0036] Example 1:

[0037] like Figures 1 to 4 As shown, the abrasive blasting cleaning system for cleaning strip and sheet materials in this embodiment includes multiple blasting cleaning devices designed according to the width of the strip and sheet material. The number of multiple blasting cleaning devices is configured in an even number, and the even number of blasting cleaning devices is divided into n groups of two adjacent blasting cleaning devices, where n≥1. Each group of two adjacent blasting cleaning devices includes a first blasting cleaning device 3 and a second blasting cleaning device 4 adjacent to each other along the strip and sheet material conveying direction. The first blasting cleaning device 3 includes a first abrasive tank 31 and a first cleaning device 32 that are interconnected. The second blasting cleaning device 4 includes a second abrasive tank 41 and a second cleaning device 42 that are interconnected. An abrasive circulation conveying device is provided between the first blasting cleaning device 3 and the second blasting cleaning device 4. The abrasive circulation conveying device includes a first conveying device 1 for conveying the abrasive sprayed from the first cleaning device 32 to the second abrasive tank 41, and a second conveying device 2 for conveying the abrasive sprayed from the second cleaning device 42 to the first abrasive tank 31. In this embodiment, the specific strip and sheet material is steel plate 01, and the arrow direction in the figure indicates the strip and sheet material conveying direction.

[0038] In this embodiment, the first conveying device 1 includes a first collecting hopper 11 for collecting abrasive material ejected by the first cleaning device 32, and a first conveying assembly 12 for conveying the abrasive material from the first collecting hopper 11 upwards to the second abrasive tank 41. The second conveying device 2 includes a second collecting hopper 21 for collecting abrasive material ejected by the second cleaning device 42, and a second conveying assembly 22 for conveying the abrasive material from the second collecting hopper 21 upwards to the first abrasive tank 31. The discharge port of the first collecting hopper 11 is located at the low-end input port of the first conveying assembly 12, the second abrasive tank 41 is located at the high-end output port of the first conveying assembly 12, the discharge port of the second collecting hopper 21 is located at the low-end input port of the second conveying assembly 22, and the first abrasive tank 31 is located at the high-end output port of the second conveying assembly 22.

[0039] In this embodiment, the first conveying assembly 12 includes a first partition conveyor belt 121, and the second conveying assembly 22 includes a second partition conveyor belt 221. The conveying direction of the first partition conveyor belt 121 is linearly inclined upward and consistent with the conveying direction of the strip material. The conveying direction of the second partition conveyor belt 221 is linearly inclined upward and opposite to the conveying direction of the strip material. The first partition conveyor belt 121 and the second partition conveyor belt 221 are respectively arranged on both sides of the strip material.

[0040] In this embodiment, the first conveying assembly 12 further includes a first recollection assembly for collecting abrasive material overflowing from the low-end inlet of the first partition conveyor belt 121, and the second conveying assembly 22 further includes a second recollection assembly for collecting abrasive material overflowing from the low-end inlet of the second partition conveyor belt 221.

[0041] In this embodiment, the first recollection assembly includes a first recollection hopper 122 located below the lower inlet of the first partition conveyor belt 121, and a first jet pump for conveying the abrasive from the first recollection hopper 122 to the second abrasive tank 41. The second recollection assembly includes a second recollection hopper 222 located below the lower inlet of the second partition conveyor belt 221, and a second jet pump for conveying the abrasive from the second recollection hopper 222 to the first abrasive tank 31. Both the first recollection hopper 122 and the second recollection hopper 222 are equipped with material sensors. When the collected abrasive reaches a certain level, the material sensor will be triggered, opening its corresponding jet pump to convey the abrasive back to the corresponding first abrasive tank 31 or second abrasive tank 41 on the same side.

[0042] In this embodiment, the high-end output port of the first partition conveyor belt 121 is provided with a first flushing component 123 for flushing the abrasive at the flipped part of the first partition conveyor belt 121 to the lower second abrasive tank 41, and the high-end output port of the second partition conveyor belt 221 is provided with a second flushing component 223 for flushing the abrasive at the flipped part of the second partition conveyor belt 221 to the lower first abrasive tank 31.

[0043] In this embodiment, the first partition conveyor belt 121 and the second partition conveyor belt 221 respectively surround the first conveyor box 124 and the second conveyor box 224. Both sides of the first partition conveyor belt 121 and the second partition conveyor belt 221 are provided with skirts to prevent abrasive from leaking from the sides.

[0044] In this embodiment, both the first abrasive tank 31 and the second abrasive tank 41 are mounted below the high-end output port of the conveyor belt via four abrasive tank support legs 9. The inlet of the first abrasive tank 31 is equipped with a first drum screen 311 for screening abrasives. The inlet of the second abrasive tank 41 is equipped with a second drum screen 411 for screening abrasives.

[0045] In this embodiment, the first abrasive jar 31 has a first abrasive inlet at its lower part, which is connected to the inlet of the second abrasive jar 41 via a conveying pipe. The second abrasive jar 41 has a second abrasive inlet at its lower part, which is also connected to the inlet of the second abrasive jar 41 via a conveying pipe. A jet pump conveys the abrasive from the first abrasive inlet to the second abrasive jar 41 and vice versa. Both the first and second abrasive inlets are equipped with pneumatically controlled valves, which open when the weight difference between the first and second abrasive jars reaches a set value. This design allows for fine-tuning of the abrasive between the two jars, further improving the uniformity of the abrasive between them.

[0046] In this embodiment, the first cleaning device 32 includes a first nozzle group composed of a plurality of first nozzles 321, and a first conveying pipe 322 connecting the first nozzle group and the first abrasive tank 31. The plurality of first nozzles 321 are arranged in a gradient inclined manner along the strip conveying direction, and the spraying direction of the first nozzles 321 is perpendicular to the strip conveying direction and faces the side of the first partition conveyor belt 121. The second cleaning device 42 includes a second nozzle group composed of a plurality of second nozzles 421, and a second conveying pipe 422 connecting the second nozzle group and the second abrasive tank 41. The plurality of second nozzles 421 are arranged in a gradient inclined manner along the strip conveying direction, and the spraying direction of the second nozzles 421 is perpendicular to the strip conveying direction and faces the side of the second partition conveyor belt 221.

[0047] In this embodiment, the first collecting hopper 11 is located below the first nozzle assembly. The first collecting hopper 11 includes a tapered first opening 111 and a first flow channel 112 communicating with the first opening 111. The first opening 111 is located below the spray side of the first nozzle 321. The outlet of the first flow channel 112 is located above the low-end inlet of the first partition conveyor belt 121. The second collecting hopper 21 is located below the second nozzle assembly. The second collecting hopper 21 includes a tapered second opening 211 and a second flow channel 212 communicating with the second opening 211. The second opening 211 is located below the spray side of the second nozzle 421. The outlet of the second flow channel 212 is located above the low-end inlet of the second partition conveyor belt 221.

[0048] In this embodiment, there are N cleaning boxes 5, the number of cleaning boxes 5 is even, each cleaning box 5 is equipped with a spray cleaning device, the width of the strip is D, the cleaning width of each spray cleaning device is d=D / N, and the cleaning width of each spray cleaning device is in the range of 540-1080mm.

[0049] In this embodiment, the first nozzle group includes a plurality of first nozzles 321 symmetrically arranged on the upper and lower sides of the strip. The plurality of first nozzles 321 are arranged in a gradient inclined manner from the side near the first partition conveyor belt 121 toward the middle of the strip along the strip conveying direction. The second nozzle group includes a plurality of second nozzles 421 symmetrically arranged on the upper and lower sides of the strip. The plurality of second nozzles 421 are arranged in a gradient inclined manner from the other side toward the middle of the strip along the strip conveying direction.

[0050] In this embodiment, specifically, the number of cleaning boxes 5 is set to two according to the width of the strip material, namely a first box 51 and a second box 52. The first nozzle 321 and the second nozzle 421 are located in the first box 51 and the second box 52 respectively. The first collection hopper 11 and the second collection hopper 21 are respectively located at the bottom of the first box 51 and the second box 52. The sum of the spray cleaning width of the first nozzle 321 and the second nozzle 421 covers the width of the strip material. Abrasive water jet process is used for spraying. In the wet shot blasting process, the blasting direction of the blasting head can be at a certain angle to the conveying direction of the strip material.

[0051] In this embodiment, the imbalance in abrasive supply caused by the unidirectional migration of abrasive in the strip conveying direction is addressed by constructing a bidirectional closed abrasive circulation conveying path between adjacent cleaning boxes 5. This allows the abrasive to flow actively and complementaryly between the upstream and downstream. The coordinated arrangement of the nozzles and the collection hopper is key to ensuring the efficient operation of the balanced circulation mechanism. The two sets of nozzles are arranged at a gradient angle from both sides of the strip towards the middle along the strip conveying direction, and the spray direction is precisely directed towards the collection hopper opening and the partition conveyor belt located on the side. After cleaning, the kinetic energy and trajectory of the sprayed abrasive are guided to the designated collection side, greatly reducing the proportion of abrasive splashing disorderly within the tank, especially the proportion flying forward along the conveying direction of the strip. This suppresses the natural imbalance caused by the abrasive migrating with the flow, and the efficient directional recycling ensures that most of the used abrasive can quickly enter the circulation conveying channel, shortening the time for abrasive to return to the abrasive tank. This allows each abrasive tank to receive returned abrasive in a timely manner, with small fluctuations in the tank's material level and density, providing a continuous and stable supply of abrasive to the nozzle. This effectively reduces the changes in the spray impact force caused by fluctuations in the material supply, ensuring uniform and consistent treatment of the strip surface.

[0052] Compared with the traditional layout of nozzles facing the same side and conventional collection hopper with its inlet located directly below the housing for abrasive collection, this embodiment allows the abrasive sprayed out to mainly fall directly above the sand suction inlet of the collection hopper, shortening the distance the abrasive travels into the suction inlet and greatly accelerating the abrasive circulation speed. The results show that: in the comparative example, the abrasive collection time for a single tank was 3 minutes, the system abrasive circulation stabilization time for maintaining the benchmark abrasive supply was 24 hours, the effective abrasive recovery rate was 70%, the abrasive quantity difference between abrasive tanks was greater than 12 tons, the abrasive jet impact force fluctuation range was 80-160 N, and the standard deviation of the surface roughness of the strip was 2.8 μm; in this embodiment, the abrasive collection time for a single tank was 1.5 minutes, the system abrasive circulation stabilization time for maintaining the benchmark abrasive supply was 48 hours, the effective abrasive recovery rate was 95%, the abrasive quantity difference between abrasive tanks was less than 5 tons, the abrasive jet impact force fluctuation range was 110-165 N, and the standard deviation of the surface roughness of the strip was 2.4 μm. These data fully demonstrate that the coordinated arrangement of the nozzles and collection hoppers in this embodiment, through precise directional recovery and efficient circulation of the abrasive, directly ensures the high uniformity of the abrasive between the paired devices, thereby fundamentally stabilizing the jet impact force and ensuring the uniformity and stability of the strip surface treatment quality.

[0053] In this embodiment, both the output end of the strip and plate inside the first housing 51 and the second housing 52 are provided with shot blasting assembly 6 for flushing residual abrasive back into the housing. The shot blasting assembly 6 includes a plurality of shot blasting nozzles arranged along the width direction of the strip and plate, and the spraying direction of the shot blasting nozzles is toward the conveying direction of the strip and plate.

[0054] In this embodiment, both the inner plate and strip input ends of the first housing 51 and the second housing 52 are equipped with overflow collection components 7 for receiving overflow water and suspended abrasive from upstream of the spraying area. The overflow collection components 7 include overflow ports 71 respectively located on the side walls of the first housing 51 and the second housing 52. Each overflow port 71 is equipped with a filter screen and connected to a wastewater sedimentation tank 81. The overflow collection components 7 also include overflow abrasive collection hoppers 72 respectively located at the bottom plate and strip input ends of the first housing 51 and the second housing 52. The filter screens ensure that the abrasive remains inside the housing, while excess water and dust particles smaller than the abrasive flow out through the overflow ports 71 to the wastewater sedimentation tank 81.

[0055] In this embodiment, a water circulation assembly 8 is also included. The water circulation assembly 8 includes a shot blasting water supply pump 83 for supplying pressurized water to the shot blasting assembly 6, a jet pump water supply pump 84 for supplying pressurized water to the jet pump of the recollection assembly, and a nozzle water supply pump 85 for supplying pressurized water to the nozzle assembly. All circulating water flows through a wastewater filter 82 to a wastewater sedimentation tank 81, and the water in the wastewater sedimentation tank 81 is then supplied to each water supply pump. The wastewater filter 82 can filter high-concentration wastewater and concentrate and solidify the removed oxide scale for reuse as iron concentrate.

[0056] In this embodiment, the specific abrasive circulation cleaning steps include: the steel plate 01 is horizontally conveyed to the space between the first nozzles 321 inside the first housing 51; the first nozzles 321 spray abrasive to clean the upper and lower surfaces of one side of the steel plate 01; the abrasive falls by its own weight to the first collection hopper 11 below, and after being collected in the collection hopper, it falls into the low-end inlet of the first partition conveyor belt 121. The first partition conveyor belt 121, with the help of its partition structure, tilts the abrasive upward along the conveying direction of the steel plate 01 to the high-end outlet; the abrasive then falls into the second drum screen 411 below for screening and impurity removal; the qualified abrasive after screening flows into the second abrasive tank 41; the abrasive in the tank is supplied to the adjacent second nozzle 421 via the second conveying pipe 422. Meanwhile, steel plate 01 continues to be horizontally conveyed to the second nozzles 421 within the second housing 52. The second nozzles 421 spray abrasive to clean the upper and lower surfaces of the other side of steel plate 01. The abrasive falls by its own weight into the second collection hopper 21 below, and after converging in the collection hopper, it falls into the low-end inlet of the second partition conveyor belt 221. The second partition conveyor belt 221, also using its partition structure, tilts the abrasive upwards along the opposite direction of steel plate 01 to the high-end outlet. The abrasive then falls into the first drum screen 311 below for screening and impurity removal. The qualified abrasive after screening flows into the first abrasive tank 31, and the abrasive in the tank is supplied to the first nozzles 321 via the first conveying pipe 322. After receiving the abrasive from the first abrasive tank 31, the first nozzles 321 continuously spray to clean the upper and lower surfaces of subsequent steel plates 01, thereby forming a balanced circulation of abrasive between the first housing 51 and the second housing 52.

[0057] Example 2:

[0058] like Figures 5 to 7 As shown, the abrasive blasting cleaning system for cleaning strips in this embodiment is basically the same as that in embodiment 1, except that: in this embodiment, a cleaning box 5 is included, and a first cleaning device 32 and a second cleaning device 42 are provided in the cleaning box 5. A first collecting hopper 11 and a second collecting hopper 21 are arranged adjacent to each other below the first cleaning device 32 and the second cleaning device 42. The cleaning width range of the first cleaning device 32 and the second cleaning device 42 both cover the width of the strip.

[0059] In this embodiment, the first nozzle group includes multiple first nozzles 321 disposed on the lower side of the strip, and the second nozzle group includes multiple second nozzles 421 correspondingly disposed on the upper side of the strip. Both the multiple first nozzles 321 and the multiple second nozzles 421 are arranged in a gradient inclined manner from one side of the strip to the other along the strip conveying direction. In other embodiments, the first nozzles 321 may be disposed on the upper side of the strip, and the second nozzles 421 may be disposed on the lower side of the strip.

[0060] In this embodiment, the specific abrasive circulation cleaning steps include: the steel plate 01 is horizontally conveyed to the first nozzle 321 in the cleaning box 5, where the first nozzle 321 sprays abrasive to clean the lower surface of the steel plate 01; the abrasive falls by its own weight to the first collection hopper 11 below, and after being collected in the collection hopper, it falls into the low-end inlet of the first partition conveyor belt 121. The first partition conveyor belt 121, with its partition structure, tilts the abrasive upwards along the conveying direction of the steel plate 01 to the high-end outlet, where the abrasive then falls into the second drum screen 411 below for screening and impurity removal. The qualified abrasive after screening flows into the second abrasive tank 41, and the abrasive in the tank is supplied to the adjacent second nozzle 421 via the second conveying pipe 422. Simultaneously, the steel plate 01 continues to be horizontally conveyed to the second nozzle 421, where the second nozzle 421 sprays abrasive to clean the upper surface of the steel plate 01; the abrasive falls by its own weight to the second collection hopper 21 below, and after being collected in the collection hopper, it falls into the low-end inlet of the second partition conveyor belt 221. The second partition conveyor belt 221, also utilizing its partition structure, tilts the abrasive upwards along the steel plate 01 in the opposite direction to the high-end output port. The abrasive then falls into the first drum screen 311 below for screening and impurity removal. The qualified abrasive after screening flows into the first abrasive tank 31, and the abrasive in the tank is supplied to the first nozzle 321 via the first conveying pipe 322. After receiving the abrasive from the first abrasive tank 31, the first nozzle 321 continuously sprays to clean the lower surface of the subsequent steel plate 01, thereby forming a balanced circulation of abrasive between the first nozzle 321 and the second nozzle 421 within the cleaning box 5.

[0061] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An abrasive blasting cleaning system for cleaning sheet and strip materials, characterized in that, The device includes multiple spray cleaning devices designed according to the width of the strip, and the number of multiple spray cleaning devices is even. The multiple spray cleaning devices are divided into n groups of two adjacent spray cleaning devices, n≥1. Each group of two adjacent spray cleaning devices includes a first spray cleaning device (3) and a second spray cleaning device (4) adjacent to each other along the strip conveying direction. The first spray cleaning device (3) includes a first abrasive tank (31) and a first cleaning device (32) that are interconnected. The second spray cleaning device (4) includes a second abrasive tank (41) and a second cleaning device (42) that are interconnected. An abrasive circulation conveying device is provided between the first spray cleaning device (3) and the second spray cleaning device (4). The abrasive circulation conveying device includes a first conveying device (1) for conveying the abrasive sprayed by the first cleaning device (32) to the second abrasive tank (41), and a second conveying device (2) for conveying the abrasive sprayed by the second cleaning device (42) to the first abrasive tank (31). The first conveying device (1) includes a first collecting hopper (11) for collecting abrasive material ejected by the first cleaning device (32), and a first conveying assembly (12) for conveying the abrasive material in the first collecting hopper (11) upwards to the second abrasive tank (41). The second conveying device (2) includes a second collecting hopper (21) for collecting abrasive material ejected by the second cleaning device (42), and a second conveying assembly (22) for conveying the abrasive material in the second collecting hopper (21) upwards to the first abrasive tank (31). The discharge port of the first collecting hopper (11) is located at the low-end input port of the first conveying assembly (12), the second abrasive tank (41) is located at the high-end output port of the first conveying assembly (12), the discharge port of the second collecting hopper (21) is located at the low-end input port of the second conveying assembly (22), and the first abrasive tank (31) is located at the high-end output port of the second conveying assembly (22). The first conveying assembly (12) includes a first partition conveyor belt (121), and the second conveying assembly (22) includes a second partition conveyor belt (221). The conveying direction of the first partition conveyor belt (121) is linearly inclined upward and consistent with the conveying direction of the strip material. The conveying direction of the second partition conveyor belt (221) is linearly inclined upward and opposite to the conveying direction of the strip material. The first partition conveyor belt (121) and the second partition conveyor belt (221) are respectively arranged on both sides of the strip material. The first cleaning device (32) includes a first nozzle group consisting of a plurality of first nozzles (321) and a first conveying pipe (322) connecting the first nozzle group and the first abrasive tank (31). The plurality of first nozzles (321) are arranged in a gradient inclined manner along the strip conveying direction. The spraying direction of the first nozzles (321) is perpendicular to the strip conveying direction and faces the first partition conveyor belt (121). The second cleaning device (42) includes a second nozzle group consisting of a plurality of second nozzles (421) and a second conveying pipe (422) connecting the second nozzle group and the second abrasive tank (41). The plurality of second nozzles (421) are arranged in a gradient inclined manner along the strip conveying direction. The spraying direction of the second nozzles (421) is perpendicular to the strip conveying direction and faces the second partition conveyor belt (221).

2. The abrasive blasting cleaning system according to claim 1, characterized in that, The first conveying assembly (12) further includes a first recollection assembly for collecting abrasive material overflowing from the lower inlet of the first partition conveyor belt (121), and the second conveying assembly (22) further includes a second recollection assembly for collecting abrasive material overflowing from the lower inlet of the second partition conveyor belt (221).

3. The abrasive blasting cleaning system according to claim 2, characterized in that, The first recollection assembly includes a first recollection hopper (122) located below the lower end inlet of the first partition conveyor belt (121), and a first jet pump for conveying the abrasive in the first recollection hopper (122) to the second abrasive tank (41). The second recollection assembly includes a second recollection hopper (222) located below the lower end inlet of the second partition conveyor belt (221), and a second jet pump for conveying the abrasive in the second recollection hopper (222) to the first abrasive tank (31).

4. The abrasive blasting cleaning system according to claim 1, characterized in that, The first partition conveyor belt (121) is provided with a first flushing component (123) at the high end of the first partition conveyor belt (121) to flush the abrasive at the flipped part of the first partition conveyor belt (121) to the lower second abrasive tank (41), and the second partition conveyor belt (221) is provided with a second flushing component (223) at the high end of the second partition conveyor belt (221) to flush the abrasive at the flipped part of the second partition conveyor belt (221) to the lower first abrasive tank (31).

5. The abrasive blasting cleaning system according to claim 1, characterized in that, The first partition conveyor belt (121) and the second partition conveyor belt (221) respectively surround the first conveyor box (124) and the second conveyor box (224).

6. The abrasive blasting cleaning system according to claim 1, characterized in that, The first collecting hopper (11) is located below the first nozzle assembly. The first collecting hopper (11) includes a tapered first opening (111) and a first flow channel (112) communicating with the first opening (111). The first opening (111) is located below the spray side of the first nozzle (321). The outlet of the first flow channel (112) is located above the low-end inlet of the first partition conveyor belt (121). The second collecting hopper (21) is located below the second nozzle assembly. The second collecting hopper (21) includes a tapered second opening (211) and a second flow channel (212) communicating with the second opening (211). The second opening (211) is located below the spray side of the second nozzle (421). The outlet of the second flow channel (212) is located above the low-end inlet of the second partition conveyor belt (221).

7. The abrasive blasting cleaning system according to claim 1, characterized in that, It includes N cleaning boxes (5), the number of cleaning boxes (5) is even, each cleaning box (5) is provided with a spray cleaning device, the width of the strip is D, the cleaning width of each spray cleaning device is d=D / N, and the cleaning width of each spray cleaning device is 540-1080mm.

8. The abrasive blasting cleaning system according to claim 7, characterized in that, The first nozzle group includes a plurality of first nozzles (321) symmetrically arranged on the upper and lower sides of the strip. The plurality of first nozzles (321) are arranged in a gradient inclined manner from the side near the first partition conveyor belt (121) towards the middle of the strip along the strip conveying direction. The second nozzle group includes a plurality of second nozzles (421) symmetrically arranged on the upper and lower sides of the strip. The plurality of second nozzles (421) are arranged in a gradient inclined manner from the other side towards the middle of the strip along the strip conveying direction.

9. The abrasive blasting cleaning system according to claim 1, characterized in that, The system includes a cleaning box (5), which contains a first cleaning device (32) and a second cleaning device (42). The first collection hopper (11) and the second collection hopper (21) are arranged adjacent to each other below the first cleaning device (32) and the second cleaning device (42). The cleaning width of the first cleaning device (32) and the second cleaning device (42) both cover the width of the strip.

10. The abrasive blasting cleaning system according to claim 9, characterized in that, The first nozzle group includes multiple first nozzles (321) disposed on the upper or lower side of the strip, and the second nozzle group includes multiple second nozzles (421) disposed on the other side of the strip. The multiple first nozzles (321) and the multiple second nozzles (421) are arranged in a gradient inclined manner from one side of the strip to the other side along the conveying direction of the strip.

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