Multi-chamber strip steel sanding line

Abstract

The utility model relates to a multi-chamber body strip steel sanding line which comprises a dust removal unit, a sand blowing high-pressure fan unit and a sanding chamber body consisting of a plurality of sanding units and a high-pressure fan sand blowing dust removal chamber, the multiple sanding units are sequentially arranged in series in the advancing direction of a steel belt, and each sanding unit comprises a sanding chamber and a dust removal chamber communicated with the sanding chamber. The high-pressure fan sand blowing dust removal chamber is mounted on one side of the sanding unit and communicates with the interior of the sanding unit; the sand-blowing high-pressure fan unit is arranged on the high-pressure fan sand-blowing dust removal chamber and is used for blowing air into the high-pressure fan sand-blowing dust removal chamber; the dust removal unit is installed on the outer side of the sanding chamber body and used for removing dust. The utility model has the effects of reducing the usable area of a workshop, saving energy, reducing the emission of dust-containing waste gas and improving the environment of the workshop.

Description

Technical Field

[0001] This utility model relates to the field of steel strip sanding pretreatment technology, and in particular to a multi-chamber steel strip sanding line. Background Technology

[0002] In steel strip surface treatment, sandblasting pretreatment is a crucial step. To ensure the quality of sandblasting, the steel strip must pass through a sandblasting chamber consisting of a sandblasting chamber, a dust removal chamber, and a high-pressure blowing chamber. Through shot blasting, dust removal, and high-pressure blowing, impurities such as oxide scale and rust on the steel strip surface are effectively removed, forming a rough surface that meets the requirements of subsequent processing. With increasing efficiency demands in industrial production, improving steel strip processing speed has become a necessity. Existing technologies typically employ multiple complete sandblasting assemblies connected in series to achieve this.

[0003] Reference Figure 1 The system employs three independent sand-blasting assemblies connected in series, with each assembly spaced apart. Each of the three complete sand-blasting assemblies integrates an independent dust collection chamber, sand-blasting chamber, and dust collection system. In actual production, the number of assemblies connected in series is flexibly adjusted according to the required steel strip processing speed. For example, when the production speed requirement is low, a smaller number of assemblies are connected in series; if a significant increase in steel strip processing speed is required, the number of assemblies connected in series is increased.

[0004] The existing technical solutions described above have the following drawbacks: Although they have solved the production efficiency problem in the steel strip sandblasting pretreatment process to some extent, they still have the following three shortcomings: First, the space occupation problem is prominent. Because each complete assembly needs to be set up independently and spaced apart from each other, the overall length of the high-speed sandblasting line increases significantly, occupying a large amount of valuable production space in the workshop and limiting the layout of other equipment and capacity expansion in the workshop. Second, energy consumption is high. Each complete assembly is equipped with an independent high-pressure blower for cleaning the steel strip and a dust removal system blower. When there are many series assemblies, the number of high-pressure blowers and dust removal blowers increases dramatically, resulting in huge energy consumption and significantly increasing the company's production costs. Third, dust pollution is serious. With multiple steel strip inlet and outlet openings and high-pressure sandblasting blowers in multiple complete assemblies, it is not easy to control the sandblasting chamber to operate under a stable negative pressure. Dust easily overflows from the inlet and outlet, causing dust levels to exceed standards in the workshop and polluting the workshop environment. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a multi-chamber strip steel sanding line, which has the effects of reducing workshop area, saving energy, reducing dust-containing exhaust gas emissions, and improving the workshop environment.

[0006] The above-mentioned utility model objective is achieved through the following technical solution:

[0007] A multi-chamber strip steel sandblasting line includes a dust removal unit, a sandblasting high-pressure blower unit, and a sandblasting chamber composed of multiple sandblasting units and a high-pressure blower sandblasting and dust removal chamber.

[0008] Multiple sandblasting units are connected in series along the direction of the steel belt travel, and each sandblasting unit includes a sandblasting chamber and a dust removal chamber connected to it.

[0009] The high-pressure blower dust removal chamber is installed on one side of the sandblasting unit and is connected to the interior of the sandblasting unit;

[0010] The high-pressure blower unit for blowing air into the high-pressure blower dust removal chamber is installed on the high-pressure blower dust removal chamber.

[0011] The dust removal unit is installed on the outside of the sandblasting chamber for dust removal.

[0012] By connecting multiple sand-blasting units (sand-blasting chamber + dust removal chamber) in series along the direction of the steel belt, and integrating the high-pressure blower sand-blowing dust removal chamber and the high-pressure blower unit on the outside, the total length of the production line is shortened and the workshop area is reduced. At the same time, by having a unified dust removal unit and a high-pressure blower sand-blowing dust removal chamber work together, the number of high-pressure blowers and dust removal equipment is reduced, energy consumption is reduced, and the number of inlet and outlet ports is reduced, making it easier to maintain a negative pressure environment, reducing dust overflow, and improving the workshop environment.

[0013] As a further technical solution of this utility model: the dust removal unit includes two dust collectors and two dust removal exhaust fans. The air outlet of each dust collector is connected to the air inlet of a dust removal exhaust fan. The air outlet of each dust removal exhaust fan is connected to the dust removal discharge main pipe. The high-pressure blower sand blowing dust removal chamber and the dust removal chamber are both connected to the air inlet of the dust collector through the main air supply pipe.

[0014] Through the above technical solution, the dust collector is uniformly connected to the dust discharge main pipe, centrally treats dust-containing waste gas, reduces the number of dust collector fans and energy consumption, and facilitates unified purification and treatment of waste gas.

[0015] As a further technical solution of this utility model: the high-pressure blower sandblasting dust removal chamber includes a first high-pressure blower sandblasting dust removal chamber and a second high-pressure blower sandblasting dust removal chamber, which are connected in series along the direction of the steel belt travel to the side of the sandblasting unit.

[0016] Through the above technical solution, the dust removal unit adopts a configuration of two dust collectors and two dust removal exhaust fans, and a connection method of dust collector outlet - dust removal exhaust fan inlet - dust removal discharge main pipe, thus constructing a stable and efficient waste gas treatment path. This design ensures that the dust-laden waste gas, after being purified by the dust collectors, is directionally transported by the dust removal exhaust fans to the dust removal discharge main pipe for compliant discharge, improving dust removal efficiency, avoiding disorderly emission of waste gas, and ensuring workshop air quality and environmental compliance.

[0017] As a further technical solution of this utility model: the sandblasting high-pressure blower unit includes a first sandblasting high-pressure blower installed in the first high-pressure blower sandblasting and dust removal chamber and a second sandblasting high-pressure blower installed in the second high-pressure blower sandblasting and dust removal chamber.

[0018] Through the above technical solution, a phased high-pressure cleaning process is formed. After the steel strip is processed by the sandblasting unit, it enters two high-pressure blower sandblasting and dust removal chambers in sequence. The first high-pressure blower sandblasting and dust removal chamber initially blows away residual impurities, and the second high-pressure blower sandblasting and dust removal chamber further refines the cleaning, ensuring that impurities on the surface of the steel strip are completely removed, thereby improving the surface treatment quality and cleanliness of the steel strip.

[0019] As a further technical solution of this utility model: the number of sandblasting units is 2 to 10.

[0020] Through the above technical solution, the number of sand-blasting units ranges from 2 to 10, which allows the multi-chamber strip steel sand-blasting line to be flexibly adjusted according to different production needs. More units can be connected in series during high-speed processing to improve efficiency, while avoiding excessive space occupation.

[0021] As a further technical solution of this utility model: multiple sand-blasting units, the first high-pressure blower sand-blowing dust removal chamber and the second high-pressure blower sand-blowing dust removal chamber are connected in series to form a continuous steel strip processing channel, and the two ends of the steel strip processing channel are respectively provided with a steel strip inlet and a steel strip outlet.

[0022] By using the above technical solution, only the inlet and outlet ports at the beginning and end are retained, reducing the six openings of the traditional multi-assembly to two, reducing the dust leakage path, and working with the negative pressure system to maintain workshop cleanliness and reduce maintenance costs.

[0023] As a further technical solution of this utility model: a shot blasting machine is provided at the top of each of the sand-blasting chambers for projecting steel shot at high speed onto the surface of the steel strip.

[0024] Through the above technical solution, a shot blasting machine is installed at the top of each sandblasting chamber. The shot blasting machine can spray high-speed steel sand onto the surface of the steel strip, which will strongly impact and rub the steel strip, thereby effectively removing impurities such as oxide scale and rust from the surface of the steel strip and improving the surface quality of the steel strip.

[0025] In summary, this utility model has at least one of the following beneficial technical effects:

[0026] 1. This utility model discloses a multi-chamber strip steel sandblasting line, which connects a dust removal unit, a high-pressure blower sandblasting dust removal chamber, a high-pressure blower unit, and multiple sandblasting units in series. Each sandblasting unit adopts a structure where the sandblasting chamber and the dust removal chamber are connected, thereby shortening the length of the sandblasting line and saving workshop area. It also reduces the number of high-pressure blowers and dust removal equipment, lowers energy consumption, reduces dust overflow paths, and improves the workshop environment. The design of connecting multiple sandblasting units and two high-pressure blower sandblasting dust removal chambers in series to form a continuous steel strip processing channel, with each sandblasting unit equipped with a dust removal chamber and the high-pressure blower sandblasting dust removal chamber equipped with a high-pressure blower connected to the dust collector, shortens the total length of the high-speed sandblasting line and reduces the area used in the production workshop. Simultaneously, it reduces the number of high-pressure blowers and dust removal fans, saves energy consumption, reduces dust-laden gas emissions, and reduces dust overflow, thus improving the workshop environment.

[0027] 2. This utility model discloses a multi-chamber strip sandblasting line, which, through the exhaust gas treatment path of setting two dust collectors, two dust removal exhaust fans and a dust removal exhaust main pipe, combined with the first and second high-pressure blower sandblasting dust removal chambers and the corresponding high-pressure blower staged cleaning structure, achieves efficient purification and standard emission of dust-containing exhaust gas, ensures thorough removal of impurities on the steel strip surface, and improves the surface treatment quality.

[0028] 3. This utility model discloses a multi-chamber strip sandblasting line, which limits the number of sandblasting units to 2 to 10, and combines the closed channel design of the steel strip inlet and outlet with the shot blasting machine layout at the top of the sandblasting chamber. This allows for flexible adjustment of production capacity according to production needs, maintaining a negative pressure environment to reduce dust leakage, and using gravity to enhance the shot blasting effect, thereby improving the pretreatment quality and production applicability of the steel strip. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of an existing independent sandblasting assembly steel strip sandblasting line.

[0030] Figure 2 This is a schematic diagram of a multi-chamber steel strip sanding line according to Embodiment 1 of this utility model.

[0031] Figure 3 This is a schematic diagram showing the marking of the sanding line length in a steel strip sanding line of an existing independent sanding assembly.

[0032] Figure 4 This is a schematic diagram of the length marking of the sanding line on the multi-chamber steel strip in Embodiment 1 of this utility model.

[0033] Reference numerals in the attached drawings: 1. Sandblasting chamber; 2. Steel belt; 3. First high-pressure blower for sandblasting; 4. Second high-pressure blower for sandblasting; 5. Steel shot; 6. Shot blasting machine; 7. Dust collector; 8. Dust removal exhaust fan; 9. Main dust removal exhaust pipe; 10. Steel belt outlet; 11. First high-pressure blower sandblasting and dust removal chamber; 12. Second high-pressure blower sandblasting and dust removal chamber; 13. Sandblasting chamber; 14. Dust removal chamber; 15. Steel belt inlet; 16. High-pressure sandblasting duct; 17. Main air supply duct; 18. Branch air supply duct. Detailed Implementation

[0034] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0035] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0037] Example 1:

[0038] Reference Figure 2 This utility model discloses a multi-chamber strip steel sandblasting line, including a dust removal unit, a high-pressure blower unit, and a sandblasting chamber 1 composed of multiple sandblasting units and a high-pressure blower dust removal chamber. The multiple sandblasting units are connected in series along the traveling direction of the steel strip 2. Each sandblasting unit consists of a sandblasting chamber 13 connected to a dust removal chamber 14. The top of the sandblasting chamber 13 is bolted to a shot blasting machine 6. The shot blasting machine 6 propels steel shot 5 at high speed onto the surface of the steel strip 2, using impact and friction to remove impurities such as oxide scale and rust, completing the surface sandblasting process.

[0039] The high-pressure blower sand blowing dust removal chamber is installed on one side of the sand making unit and is connected to the inside of the sand making unit. The high-pressure blower sand blowing dust removal chamber includes a first high-pressure blower sand blowing dust removal chamber 11 and a second high-pressure blower sand blowing dust removal chamber 12, which are sequentially connected in series along the traveling direction of the steel belt 2 on the side of the sand making unit.

[0040] The dust removal unit is installed on the outside of the sandblasting chamber 1, or further located in the external space of the workshop, to extract and purify the polluted air generated inside the sandblasting chamber 1. The dust removal unit includes two dust collectors 7 and two dust removal exhaust fans 8. The outlet of each dust collector 7 is connected to the inlet of the dust removal exhaust fan 8, and the exhaust outlet of the dust removal exhaust fan 8 is connected to the dust removal discharge main pipe 9. The first high-pressure blower sandblasting dust removal chamber 11, the second high-pressure blower sandblasting dust removal chamber 12, and the dust removal chamber 14 are all connected to the inlet of the dust collector 7 through the main air supply pipe 17, forming a waste gas treatment path of "dust removal chamber - main air supply pipe 17 - inlet of dust collector 7 - outlet of dust collector 7 - inlet of dust removal exhaust fan 8 - dust removal discharge main pipe 9", ensuring that the dust-containing waste gas meets the emission standards after purification.

[0041] The high-pressure blower unit includes a first high-pressure blower 3 installed in the first high-pressure blower dust removal chamber 11 and a second high-pressure blower 4 installed in the second high-pressure blower dust removal chamber 12. The air outlets of both the first and second high-pressure blowers 3 and 4 are fixedly connected to a high-pressure blower duct 16. The first and second high-pressure blowers 3 and 4 spray high-pressure airflow onto the surface of the steel strip 2 through the high-pressure blower duct 16 to complete the residual impurity removal process. The high-pressure blower duct 16 has a streamlined conical structure, with the front end being the spray nozzle and the rear end being the connection end. This shape effectively reduces airflow resistance during transmission, allowing for smoother airflow and improving blower efficiency. The rear end of the high-pressure sand blowing duct 16 is fixed to the mounting holes at the top of the first high-pressure blower sand blowing dust removal chamber 11 and the second high-pressure blower sand blowing dust removal chamber 12. The connection method can be flexibly selected according to the working conditions. For example, flange connection can be used in scenarios that require regular disassembly and maintenance, while welding can be used in continuous operation scenarios that require high pressure and low maintenance.

[0042] The sandblasting chamber 1 is composed of multiple sandblasting units (sandblasting chamber 13 connected to dust removal chamber 14) and a high-pressure blower sandblasting dust removal chamber connected in series. To ensure overall sealing and ease of maintenance, different connection methods are used between adjacent chambers. For parts with high stability requirements, such as the connection between the sandblasting unit and the first high-pressure blower sandblasting dust removal chamber 11 and the second high-pressure blower sandblasting dust removal chamber 12, a flange connection structure with rubber sealing rings is used: 8mm thick Q235B carbon steel flanges are welded to each connection end face, and annular silicone rubber sealing rings with a Shore hardness of 70 and a temperature resistance of -30℃ to 150℃ are embedded. These are then uniformly tightened with 12 sets of M12 high-strength bolts to ensure sealing performance and structural strength, guaranteeing stable airflow and preventing dust leakage during steel strip processing. For areas requiring frequent maintenance or adjustment, 304 stainless steel sealing clips are used for connection. The snap-fit ​​body is integrally molded and equipped with a 10mm×15mm dovetail groove sealing strip. Quick locking is achieved by rotating the handle, with a single assembly / disassembly time not exceeding 2 minutes, improving equipment maintenance efficiency. To further enhance sealing, an L-shaped transition sealing plate (5mm thick) is installed at the connection between adjacent chambers. The inner side of the plate is coated with a 0.1mm thick polytetrafluoroethylene coating to reduce dust adhesion; an elastic sealing strip is added to the outer side. When the chambers shift due to thermal expansion and contraction, it can adaptively compensate for gaps of 0-3mm, ensuring long-term sealing effectiveness. Both the first sandblasting high-pressure blower 3 and the second sandblasting high-pressure blower 4 are centrifugal high-pressure blowers. Adjustable guide hoods are installed at the blower outlets, and the airflow direction is controlled by an electric actuator (adjustment angle range 0-60°), concentrating the high-pressure airflow onto the surface of the steel belt 2, increasing blowing efficiency by 30%.

[0043] The two dust collectors 7 adopt a parallel integrated design, forming a gas delivery network through the main air supply duct 17 and branch air supply ducts 18. Specifically, the air inlet of each dust collector 7 is connected to the air outlet of a main air supply duct 17, and the air inlet of the main air supply duct 17 is connected to multiple branch air supply ducts 18. Each branch air supply duct 18 is independently connected to the top of each dust removal chamber 14, the top of the first high-pressure blower sandblasting dust removal chamber 11, and the top of the second high-pressure blower sandblasting dust removal chamber 12. The main air supply duct 17 is made of Q235B carbon steel or 304 stainless steel, with an inner ceramic wear-resistant layer, an outer rock wool insulation layer, and ring-shaped reinforcing ribs to ensure high flow transmission. The branch air supply ducts 18 are made of lightweight rust-proof materials such as galvanized steel plates, connected to the main duct at a 30°-45° angle, and designed with a uniform diameter of 200-300mm to achieve balanced airflow in each dust removal chamber. The connection between the main air supply duct 17 and the branch air supply duct 18 can be made using flanges or quick couplings, reinforced with sealant to ensure sealing and ease of maintenance.

[0044] Reference Figure 2Multiple sandblasting units, a first high-pressure blower sandblasting and dust removal chamber 11, and a second high-pressure blower sandblasting and dust removal chamber 12 are connected in series to form a continuous steel strip processing channel. The steel strip processing channel has a steel strip inlet 15 and a steel strip outlet 10 at each end. The steel strip 2 enters through the steel strip inlet 15, passes through multiple sandblasting units and the high-pressure blower sandblasting and dust removal chamber in sequence, and after completing surface sandblasting and cleaning, it is output from the steel strip outlet 10, realizing continuous surface treatment of the steel strip 2. To further improve sealing, the steel strip inlet 15 and the steel strip outlet 10 can adopt a three-stage sealing structure. For example, an adjustable rubber sealing curtain (8mm thick, temperature resistant -20℃~120℃) is installed in the inner layer, closely adhering to the surface of the steel strip 2, and a high-density wear-resistant brush (PA66 material, bristle diameter 0.3mm, density 120 bristles / cm²) is installed in the middle layer. 2 It forms a physical barrier, and the outer layer is equipped with an air curtain device (air outlet width 5mm, air pressure 0.25MPa), which uses the annular airflow to suppress the scattered dust back into the channel and improve the sealing performance.

[0045] The number of sandblasting units connected in series can be flexibly adjusted according to actual production speed requirements, ranging from 2 to 10. The more sandblasting units connected in series, the faster the production line, and the more significant the energy-saving and workshop area-saving effects. For example, when processing thin steel strips ≤3mm thick, 2-4 sandblasting units are used, the shot blasting machine 6 has a power of 11kW, and the conveying speed can reach 30m / min, ensuring a surface roughness Ra of 50-70μm. When processing thick steel strips ≥8mm thick, 6-10 sandblasting units are configured, the power of the shot blasting machine 6 is increased to 18.5kW, the conveying speed is reduced to 15m / min, and the surface roughness Ra can be controlled within 80-100μm.

[0046] Compared with traditional multi-unit series technology, this utility model achieves significant breakthroughs in space utilization, energy consumption control, and environmental performance.

[0047] One approach is to optimize space utilization and reduce the length of the sanding line.

[0048] Reference Figure 3 The existing technology uses three independent sandblasting assemblies connected in series, including three sandblasting units, namely three sandblasting chambers 13, three dust removal chambers 14, as well as three first high-pressure blower sandblasting and dust removal chambers 11 and three second high-pressure blower sandblasting and dust removal chambers 12, for a total of twelve chambers.

[0049] Assuming each chamber is m wide, there are 2 intervals between the three independent sand-blasting assemblies, and the distance between each interval is n.

[0050] So, referring to Figure 3 In the existing technology, the total length of the sandblasting line is L. 现有 =12m+2n; refer to Figure 4 The total length of the sanding line of this utility model is shortened to L. 实用 =8m (There are a total of 8 chambers, and the width of each chamber is m).

[0051] The amount of shortening of the sanding line length ΔL=L 现有 -L 实用 =4m+2n, shortening the proportion

[0052] In actual production, the width m of the equipment compartment is usually positively correlated with the required maintenance interval n. To simplify the calculation, we assume n = m (i.e., the interval distance is equal to the width of a single compartment). This assumption conforms to the conventional proportions of equipment layout in most workshops. Substituting into the calculation: shortening ratio

[0053] If workshop space is limited, the spacing can be reduced to (n = 0.5m). If a compact layout is adopted, the ratio can be shortened.

[0054] If the chamber width is large and the spacing needs to meet requirements such as forklift passage (n = 2m), then the ratio should be shortened.

[0055] By integrating the chamber structure and eliminating redundant intervals, the length of the sandblasting line of this invention can be reduced by 38.5% to 50% (depending on the actual ratio of m to n), significantly improving the utilization rate of workshop space, while optimizing the production line layout and controlling costs.

[0056] Secondly, energy consumption is significantly reduced.

[0057] Reference Figure 1 The existing technology requires 6 high-pressure blowers for sand blowing and 3 sets of dust removal systems (each set includes a dust collector 7 and a dust removal exhaust fan 8);

[0058] Reference Figure 2 However, this utility model only retains 2 high-pressure blowers and 2 dust removal systems, reducing 4 high-pressure blowers and 1 dust removal system.

[0059] Theoretical power comparison: the power of a single sand blowing high-pressure blower is set as P1, and the combined power of a single dust collector 7 and dust removal exhaust fan 8 is set as P2.

[0060] Total power of existing technology: P 传 =6P1 + 3P2;

[0061] Total power of this utility model: P 新 =2P1 + 2P2;

[0062] Taking a certain operating condition as an example, if P1 = 10kW and P2 = 55kW:

[0063] Then P 传 = 6×10 + 3×55 = 225 kW, P 新 = 2×10 + 2×55 = 130 kW, and the theoretical power saving ratio is

[0064] In actual production, considering factors such as the load rate and efficiency curve during the operation of the fan, the comprehensive estimated power saving ratio is over 40%. Moreover, the faster the production speed of the steel strip 2 and the more the tandem sanding units, the more significant the power savings will be.

[0065] Thirdly, the exhaust gas emissions are reduced.

[0066] Referring to Figure 1 , the prior art uses 3 sets of independent dust removal systems; referring to Figure 2 , the present utility model reduces 1 set of exhaust fans. The present utility model can reduce the exhaust gas emissions by more than 30%. The specific calculation is as follows: <00​​​​​​​​​​​​​​​​​​​​​​​​​​

[0074] Considering only the impact of reducing the number of overflow outlets on the amount of dust overflow, we assume that the amount of dust overflow from each overflow outlet is the same, that is, the amount of dust overflow from a single overflow outlet per unit time is a constant Q; without considering other factors such as sealing structure optimization and changes in negative pressure intensity, the amount of overflow is only proportional to the number of overflow outlets.

[0075] The total spillover of the prior art is 6Q, while the spillover of this utility model is 2Q;

[0076] Calculation of the reduction rate of dust overflow:

[0077] Calculated solely from the perspective of reducing the number of overflow outlets, dust overflow can be reduced by approximately 66.7%. In practical applications, combined with negative pressure design and optimized sealing structure (such as the three-stage sealing adopted for the steel belt inlet 15 and the steel belt outlet 10), the overall overflow reduction effect can be improved to over 80%, further ensuring the cleanliness of the workshop environment.

[0078] The implementation principle of this utility model is as follows: by integrating the sandblasting chamber 13 and the dust removal chamber 14 into a sandblasting unit, and connecting them in series to the first high-pressure blower sandblasting and dust removal chamber 11 and the second high-pressure blower sandblasting and dust removal chamber 12, a continuous processing channel is formed, reducing equipment redundancy and space occupation; the shot blasting machine 6 and the high-pressure blower respectively complete the sandblasting and cleaning of the steel strip 2, and the generated dust relies on the negative pressure system composed of the main air supply pipe 17 and the branch air supply pipe 18, and is purified by the dust collector 7 before being discharged in compliance with standards; by simplifying the number of high-pressure blowers and dust removal systems and reducing the inlet and outlet, the system achieves a reduction in equipment length, energy consumption of more than 40%, and exhaust gas emissions of more than 30%, while maintaining a stable negative pressure environment, reducing dust overflow, and significantly improving the efficiency, economy and environmental protection of steel strip surface treatment.

[0079] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A multi-cell body strip sanding line characterized by, It includes a dust removal unit, a sand blowing high-pressure blower unit, and a sand blowing chamber body (1) consisting of multiple sand blowing units and a high-pressure blower sand blowing and dust removal chamber; Multiple sand-blasting units are connected in series along the traveling direction of the steel belt (2), and each sand-blasting unit includes a sand-blasting chamber (13) and a dust removal chamber (14) connected thereto; The high-pressure blower dust removal chamber is installed on one side of the sandblasting unit and is connected to the interior of the sandblasting unit; The high-pressure blower unit for blowing air into the high-pressure blower dust removal chamber is installed on the high-pressure blower dust removal chamber. The dust removal unit is installed on the outside of the sandblasting chamber (1) for dust removal.

2. A multi-cell body belt sander as defined in claim 1 wherein, The dust removal unit includes two dust collectors (7) and two dust removal exhaust fans (8). The air outlet of each dust collector (7) is connected to the air inlet of a dust removal exhaust fan (8). The air outlet of each dust removal exhaust fan (8) is connected to the dust removal discharge main pipe (9). The high-pressure blower sand blowing dust removal chamber and the dust removal chamber (14) are both connected to the air inlet of the dust collector (7) through the main air supply pipe (17).

3. A multi-cell body belt sander as defined in claim 1 wherein, The high-pressure blower sand blowing dust removal chamber includes a first high-pressure blower sand blowing dust removal chamber (11) and a second high-pressure blower sand blowing dust removal chamber (12), which are connected in series along the traveling direction of the steel belt (2) to the side of the sand blowing unit.

4. A multi-cell body belt sander as defined in claim 3 wherein, The high-pressure blower unit includes a first high-pressure blower (3) installed in the first high-pressure blower dust removal chamber (11) and a second high-pressure blower (4) installed in the second high-pressure blower dust removal chamber (12).

5. A multi-cell body belt sander as defined in claim 1 wherein, The number of sand-blasting units is 2 to 10.

6. A multi-cell body belt sander as defined in claim 3 wherein, Multiple sand-blasting units, the first high-pressure blower sand-blowing dust removal chamber (11), and the second high-pressure blower sand-blowing dust removal chamber (12) are connected in series to form a continuous steel strip processing channel. The two ends of the steel strip processing channel are respectively provided with a steel strip inlet (15) and a steel strip outlet (10).

7. A multi-chamber strip steel sanding line according to claim 1, characterized in that, Each of the sand-blasting chambers (13) is equipped with a shot blasting machine (6) at the top for projecting steel shot (5) at high speed onto the surface of the steel strip (2).

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