Sand-blasting and dust-removing energy-saving flat plate sand-blasting machine

Abstract

The utility model relates to a kind of sand-blasting, dust-removing energy-saving flat plate sand-blasting machine, including by a plurality of dust removal chamber and sanding chamber comprising sanding chamber body that intercommunication, sand-blasting high-pressure fan, further include high-pressure sand-blasting air suction pipe, chamber body air suction main pipe, dust collector and external exhaust fan;The dust collector is communicated with each dust removal chamber by the chamber body air suction main pipe, collects and purifies dust-containing gas in each dust removal chamber;After the air purified by the dust collector, by high-pressure circulating air pipe access sand-blasting high-pressure fan air inlet, for cleaning the residual impurities on the surface of steel plate;After the exhaust gas purified by the dust collector, by the external exhaust fan is transported to outside discharge.The utility model has the effect of emission reduction, energy saving, noise reduction, dust removal.

Description

Technical Field

[0001] This utility model relates to the field of abrasive blasting technology, and in particular to a flat plate sandblasting machine that is sandblasting, dust removal and energy saving. Background Technology

[0002] In the steel plate pretreatment process, the flat plate sandblasting machine is a key piece of equipment for achieving surface cleaning of the steel plate. To ensure the surface cleanliness quality of the steel plate after sandblasting and to maintain the workshop working environment, existing flat plate sandblasting machines generally use high-pressure fans to blow away residual steel sand and dust from the steel plate surface, and exhaust the sandblasting machine chamber to maintain a negative pressure state inside the chamber and prevent dust from overflowing into the workshop environment.

[0003] However, existing flatbed sandblasting machines have many problems in practical applications: First, the high-pressure blower directly draws air from the workshop or air that has not undergone dust removal treatment to blow the steel plates. Because this type of air contains a large amount of dust, it causes secondary pollution of the steel plate surface during the blowing process, reducing the cleanliness of the steel plates. Second, the open-air operation of the high-pressure blower generates high-intensity noise, which seriously affects the working environment and physical and mental health of workshop operators. Third, in order to meet the overall dust removal needs, the main dust removal fan needs to have large air volume and high air pressure characteristics, which makes the equipment consume a lot of electricity and has high operating costs. Fourth, it is difficult to maintain a stable negative pressure in the sandblasting machine chamber. Because the sandblasting blower draws air from the workshop, when the air volume needs to be increased to clean the steel plates, it will lead to insufficient negative pressure in the sandblasting machine chamber or even short-term positive pressure. When the negative pressure is insufficient, dust is very easy to overflow into the workshop, causing the dust concentration in the workshop to exceed the standard, which not only deteriorates the working environment, but also increases the safety risks such as dust explosion. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a flat plate sandblasting machine that is energy-saving for sandblasting and dust removal, which has the effects of emission reduction, energy saving, noise reduction and dust removal.

[0005] The above-mentioned utility model objective is achieved through the following technical solution:

[0006] As a further technical solution of this utility model: a flat plate sandblasting machine for blowing sand and removing dust and saving energy, including a sandblasting chamber body composed of multiple interconnected dust removal chambers and sandblasting chambers, a sandblasting high-pressure blower, and also including a high-pressure sandblasting suction pipe, a chamber body suction main pipe, a dust collector and an exhaust fan.

[0007] The dust collector is connected to each of the dust removal chambers through the main air intake pipe of the chamber body, collecting and purifying the dust-laden gas in each of the dust removal chambers; the air purified by the dust collector is connected to the air inlet of the sandblasting high-pressure blower through the high-pressure circulating air duct, which is used to clean the residual impurities on the surface of the steel plate; the exhaust gas purified by the dust collector is transported to the outside for discharge through the exhaust fan.

[0008] Through the above technical solution, a circulating purification system is constructed, consisting of a high-pressure sandblasting suction pipe, a chamber suction main pipe, a dust collector, and an external exhaust fan. This system achieves efficient collection, purification, and recycling of dust-laden gas. Part of the purified air is recycled for cleaning steel plates, while the other part is discharged through the external exhaust fan. This achieves efficient treatment of polluted air, avoids direct emission of dust-laden gas to the environment, reduces fresh air consumption and exhaust emissions, lowers the energy consumption of the high-pressure sandblasting fan, and achieves the dual effects of energy saving and emission reduction, while ensuring the surface cleanliness of the steel plates.

[0009] As a further technical solution of this utility model: the dust collector is provided with a polluted air inlet and a clean air outlet;

[0010] The polluted air inlet is connected to each of the dust removal chambers through the chamber's main air intake pipe;

[0011] The clean air outlet includes a first clean air outlet and a second clean air outlet; the first clean air outlet is connected to the high-pressure sandblasting blower through a high-pressure sandblasting suction pipe to form a circulation system; the second clean air outlet is connected to the dust removal exhaust gas main pipe through the exhaust fan.

[0012] The total air volume of the chamber's main air intake duct is a, the air volume at the first clean air outlet is b1, and the air volume at the second clean air outlet is b2, and a = b1 + b2 is satisfied.

[0013] The above technical solution involves setting up a polluted air inlet and a clean air outlet in the dust collector, achieving precise separation of purified air. The first clean air outlet is connected to the high-pressure blower for sandblasting, forming a circulation system that ensures a stable supply of circulating air volume b1, guaranteeing the continuity and stability of sandblasting cleaning. The second clean air outlet is connected to the exhaust fan, discharging only the minimum air volume b2 required to maintain system pressure balance, thus achieving precise control of exhaust gas emissions. By precisely controlling the air volume relationship a = b1 + b2, compared to the traditional full-emission mode, exhaust gas emissions can be reduced, while the required air volume and motor power of the exhaust fan can be lowered, resulting in reduced system energy consumption and significantly improved energy-saving and environmental performance of the equipment.

[0014] As a further technical solution of this utility model: the plurality of dust removal chambers include a first dust removal chamber, a second dust removal chamber and a third dust removal chamber, the first dust removal chamber and the second dust removal chamber are respectively connected to both sides of the sandblasting chamber; the second dust removal chamber and the third dust removal chamber are connected in series along the direction of steel plate travel.

[0015] The above technical solution designs multiple dust removal chambers as a first dust removal chamber, a second dust removal chamber, and a third dust removal chamber, and adopts a specific connection method with the sandblasting chamber to optimize the steel plate processing flow, so that the steel plates can be subjected to progressive fine processing in sequence, thereby improving the efficiency and effect of surface impurity removal; at the same time, it helps the main exhaust pipe of the chamber to collect dust-laden gas more efficiently, improve the working efficiency of the dust removal system, and reduce dust residue and diffusion.

[0016] As a further technical solution of this utility model: the top of the second dust removal chamber and the third dust removal chamber are both connected to a sandblasting nozzle, and the spraying direction of the sandblasting nozzle is towards the travel path of the steel plate.

[0017] Through the above technical solution, sandblasting nozzles are installed on the top of both the second and third dust removal chambers, providing a discharge channel for the steel sand generated during the sandblasting process. This prevents the steel sand from accumulating in the dust removal chamber, affecting the normal operation and airflow circulation of the dust removal chamber; reduces the wear of steel sand on internal equipment and pipes, extending the service life of the equipment; and ensures that the sandblasting nozzles are unobstructed, maintaining a stable sandblasting cleaning effect.

[0018] As a further technical solution of this utility model: the sandblasting high-pressure blower is respectively installed at the top of the second dust removal chamber and the top of the third dust removal chamber, and the air outlet of the sandblasting high-pressure blower is directly connected to the sandblasting nozzle.

[0019] By using the above technical solution, the high-pressure blower for sandblasting is placed at the top of the second and third dust removal chambers, and the blower outlet is directly connected to the sandblasting nozzle. This shortens the airflow transmission path, reduces energy loss, and improves blasting efficiency; reduces the risk of air leakage, ensures stable sandblasting pressure and air volume, and ensures uniform cleaning effect; and facilitates equipment installation, commissioning, and maintenance, reducing maintenance costs.

[0020] As a further technical solution of this utility model: the sandblasting high-pressure blower and the dust collector are installed outdoors, and the air outlet of each sandblasting high-pressure blower is connected to the sandblasting nozzle corresponding to the second dust removal chamber and the third dust removal chamber respectively through the air supply pipe.

[0021] Through the above technical solution, the high-pressure blower and dust collector for sandblasting are installed outdoors and connected to the sandblasting nozzles via air supply ducts, effectively isolating equipment operating noise and improving the workshop working environment; achieving flexible equipment layout and improving space utilization; the parallel setting of multiple blowers can adjust the number of blowers to be turned on as needed, reducing energy consumption; the air supply ducts can also be equipped with regulating valves, filters and other accessories to further optimize airflow quality and sandblasting parameters, enhance the equipment's adaptability to steel plates of different materials and specifications, and expand the equipment's application range.

[0022] As a further technical solution of this utility model: the high-pressure sandblasting suction pipe is provided with a suction regulating valve.

[0023] Through the above technical solution, by installing an air intake regulating valve on the high-pressure sandblasting suction pipe, the circulating air volume b1 can be flexibly adjusted according to different sandblasting operation requirements. When processing thinner steel plates, the valve opening is reduced to decrease the air volume and avoid damage to the steel plates; when processing thicker steel plates or stubborn impurities, the valve opening is increased to increase the air volume and enhance the purging effect, thereby improving the applicability and accuracy of sandblasting operations, while avoiding energy waste caused by excessive air volume.

[0024] As a further technical solution of this utility model: it includes a shot blasting machine, which is installed on the top of the sand-blasting chamber and is used to propel steel shot at high speed onto the surface of the steel plate.

[0025] By installing a shot blasting machine on the top of the sandblasting chamber, the high-speed steel shot blasting process is combined with the sandblasting cleaning process. This process first powerfully removes stubborn impurities from the steel plate surface and then removes residual dust, achieving deep cleaning of the steel plate surface, improving cleaning efficiency and quality, meeting different steel plate surface treatment needs, and expanding the application range of the equipment.

[0026] In summary, this utility model has at least one of the following beneficial technical effects:

[0027] 1. This utility model discloses a flat plate sandblasting machine for sandblasting, dust removal and energy saving. It has constructed a ventilation system consisting of a high-pressure sandblasting suction pipe, a main suction pipe of the chamber, a dust collector and an exhaust fan. It realizes the dual functions of partial air volume recycling and partial air volume exhaust in compliance with standards. The system can efficiently purify and recycle dust-containing gas, which can reduce exhaust gas emissions and energy consumption, and ensure the cleanliness of the steel plate surface. At the same time, by maintaining a stable negative pressure in the sandblasting chamber, it can effectively prevent dust from overflowing.

[0028] 2. This utility model discloses a flat plate sandblasting machine for sandblasting and dust removal that is energy-saving. Through the dual-outlet diversion structure of the dust collector, the series layout of multiple dust removal chambers and the design of the sandblasting nozzle, it can achieve precise air volume distribution, stepped cleaning of steel plates and smooth discharge of steel sand, thereby improving cleaning efficiency and reducing the risk of dust residue.

[0029] 3. This utility model discloses a flat plate sandblasting machine for sandblasting, dust removal and energy saving. Through the design of top-mounted direct connection of the fan and pipeline connection, the coordinated operation of suction regulating valve and shot blasting sandblasting, the system air volume is accurately controlled and the equipment is optimized. The valve dynamically adjusts the circulating air volume b1 to adapt to different working conditions and further reduce ineffective energy consumption. The fan is moved outdoors and adopts parallel configuration to reduce indoor noise and improve the working environment. Attached Figure Description

[0030] Figure 1 This is a front view of the overall structure of Embodiment 1 of this utility model.

[0031] Figure 2This is an enlarged front view of the dust collector in Embodiment 1 of this utility model.

[0032] Figure 3 This is a flow diagram of the circulating air duct in Embodiment 1 of this utility model.

[0033] Figure 4 This is a front view of the overall structure of Embodiment 2 of this utility model.

[0034] Reference numerals: 1. Sandblasting chamber; 2. Steel plate; 3. High-pressure blower; 4. Steel shot; 5. Shot blasting machine; 6. Suction regulating valve; 7. High-pressure sandblasting suction pipe; 8. Sandblasting nozzle; 9. Main suction pipe of the chamber; 10. External exhaust fan; 11. Main exhaust pipe for dust removal; 12. Dust collector; 121. Polluted air inlet; 122. Clean air outlet; 1221. First clean air outlet; 1222. Second clean air outlet; 13. First dust removal chamber; 14. Second dust removal chamber; 15. Third dust removal chamber; 16. Discharge port; 17. Feed inlet; 18. Air supply duct; 19. Sandblasting chamber. Detailed Implementation

[0035] 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.

[0036] 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.

[0037] 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.

[0038] Example 1:

[0039] Reference Figure 1 The present invention discloses a flat plate sandblasting machine with sandblasting, dust removal and energy saving, comprising a sandblasting chamber 1 consisting of multiple interconnected dust removal chambers and sandblasting chambers 19, a sandblasting high-pressure blower 3, a high-pressure sandblasting suction pipe 7, a chamber suction main pipe 9, a dust collector 12, an external exhaust fan 10 and a shot blasting machine 5.

[0040] The dust removal chamber includes a first dust removal chamber 13, a second dust removal chamber 14, and a third dust removal chamber 15. The first dust removal chamber 13 and the second dust removal chamber 14 are respectively connected to both sides of the sandblasting chamber 19; the second dust removal chamber 14 and the third dust removal chamber 15 are connected in series along the traveling direction of the steel plate 2. The shot blasting machine 5 is installed on the top of the sandblasting chamber 19 and is used to propel steel shot 4 at high speed onto the surface of the steel plate 2.

[0041] The tops of both the second dust removal chamber 14 and the third dust removal chamber 15 are connected to sandblasting nozzles 8. The spray direction of the sandblasting nozzles 8 is directed towards the travel path of the steel plate 2, specifically at an angle of 30°-60° to the surface of the steel plate 2. The sandblasting nozzles 8 have a streamlined conical structure, with the front end being the spray port and the rear end being the connecting end. This shape can effectively reduce the resistance of the airflow during transmission, allowing the airflow to be sprayed more smoothly and improving the sandblasting efficiency. The rear end of the sandblasting nozzle 8 is fixed to the mounting holes at the top of the second dust removal chamber 14 and the third dust removal chamber 15. The connection method can be flexibly selected according to the working conditions. For example, in scenarios that require regular disassembly and maintenance, a flange connection can be used. The rear flange of the sandblasting nozzle is fastened to the top flange of the dust removal chamber with bolts, and a sealing gasket is used to ensure airtightness. In scenarios with high pressure and low maintenance for continuous operation, welding can be used to fix the sandblasting nozzle directly to the top of the dust removal chamber to form an integrated structure with high strength and excellent sealing performance. If the spray direction needs to be changed frequently, a quick-release buckle can be used. A ring clamp or spring lock is set at the edge of the mounting hole. After the rear end of the sandblasting nozzle is inserted, it is rotated to lock, and the installation or angle adjustment can be completed within 10 seconds.

[0042] Reference Figure 1 When the high-pressure blower 3 is installed at the top of the second dust removal chamber 14 and the third dust removal chamber 15 respectively, the air outlet of the high-pressure blower 3 is directly connected to the sandblasting nozzle 8. This direct connection reduces the loss in the airflow transmission process and can provide power to the sandblasting nozzle 8 more efficiently.

[0043] The dust collector 12 is connected to the first dust collection chamber 13, the second dust collection chamber 14, and the third dust collection chamber 15 through the chamber's main suction pipe 9. It is used to extract and purify the dust-laden gas generated in the first dust collection chamber 13, the second dust collection chamber 14, and the third dust collection chamber 15 due to sandblasting, shot blasting, and other operations. The air purified by the dust collector 12 is connected to the air inlet of the sandblasting high-pressure blower 3 through the high-pressure sandblasting suction pipe 7 to clean residual impurities on the surface of the steel plate 2. The exhaust gas purified by the dust collector 12 is discharged to the outside through the exhaust fan 10.

[0044] Reference Figure 2 The dust collector 12 has a polluted air inlet 121 and a clean air outlet 122. The clean air outlet 122 includes a first clean air outlet 1221 and a second clean air outlet 1222.

[0045] Reference Figure 1 and Figure 3 The polluted air inlet 121 is connected to the outlet of the main suction pipe 9 of the chamber, allowing the polluted air drawn from the first dust removal chamber 13, the second dust removal chamber 14, and the third dust removal chamber 15 to enter the dust collector 12 for purification. The first clean air outlet 1221 and the second clean air outlet 1222 split the purified air into a circulating air volume b1 and an exhaust air volume b2. The first clean air outlet 1221 is connected to the high-pressure sandblasting blower 3 through the high-pressure sandblasting suction pipe 7, which is specifically used for conveying... A circulating air volume b1 is supplied. The high-pressure blower 3 is directly fixed to the top of the sandblasting chamber 1. The outlet of the high-pressure blower 3 is connected to the sandblasting nozzle 8 of the second dust removal chamber 14 and the third dust removal chamber 15 through a flange. The pressurized clean air is sprayed from the sandblasting nozzle 8 onto the surface of the steel plate 2 to achieve the cleaning of the steel plate 2. The second clean air outlet 1222 is connected to the exhaust fan 10. The exhaust fan 10 is equipped with a dust removal exhaust gas discharge main pipe 11 to transport the exhaust air volume b2, thereby achieving reasonable diversion and treatment of the purified air.

[0046] In addition, to improve dust removal efficiency, a baffle plate can be added inside the dust collector 12 to optimize the airflow path; a pre-filter can be installed at the air outlet of the dust collector 12 to intercept larger particulate impurities and reduce the burden on the dust collector 12. To accurately control the air volume ratio of b1 and b2, electric regulating valves can be installed at the two outlet ends respectively. At the same time, to reduce the noise generated during air diversion, a silencer can be installed at the outlet connection; an air quality detection device can also be added to monitor the dust concentration of the exhaust air volume b2 in real time to ensure that emissions meet standards.

[0047] Reference Figure 2 The sandblasting chamber 1, the chamber's main suction pipe 9, the dust collector 12, the high-pressure sandblasting suction pipe 7, the high-pressure sandblasting blower 3, and the sandblasting nozzle 8 together form an internal circulation channel. The circulating air volume b1 continuously operates in this channel, and the total air volume of the system satisfies a = b1 + b2, where a is the total air volume required for the stable operation of the sandblasting chamber 1.

[0048] Furthermore, a suction regulating valve 6 is installed on the high-pressure sandblasting suction pipe 7. This suction regulating valve 6 can adjust the sandblasting intensity in real time according to the surface cleanliness requirements of the steel plate 2, and flexibly adjust the circulating air volume b1. For example, when processing thinner steel plates 2, the opening of valve 6 is reduced to decrease the air volume and prevent damage to the steel plate 2; when processing thicker steel plates 2 or stubborn impurities, the opening is increased to increase the air volume and enhance the cleaning effect. In addition, the suction regulating valve 6 can be an electric regulating valve (such as a V-type regulating ball valve or butterfly valve), which drives the valve core through a motor to achieve continuous rotation within the range of 0°-90°, realizing stepless adjustment from 0% to 100%, and precisely controlling the circulating air volume b1; high-precision pressure sensors are installed on both sides of the suction regulating valve 6 to monitor the air pressure fluctuation in the pipeline in real time with an accuracy of ±0.01MPa. When the pressure is abnormal, an alarm is automatically triggered and the opening is adjusted to avoid the risk of pipeline rupture.

[0049] In this embodiment, the working process of the flatbed sandblasting machine is as follows:

[0050] The steel plate 2 is fed into the sand-making chamber 1 at a uniform speed through the feed port 17 of the conveying system.

[0051] First, the steel plate 2 enters the shot blasting area: the steel plate 2 enters the shot blasting chamber 19, and the shot blasting machine 5 accelerates the steel shot 4 to 80-120m / s through the high-speed rotating impeller and directs it to the surface of the steel plate 2. The mechanical impact force removes stubborn impurities such as thick oxide scale and rust layer, completing the initial roughening treatment.

[0052] Subsequently, steel plate 2 enters the sandblasting cleaning area: the air inlet of the sandblasting high-pressure blower 3 is sealed to the clean air output end of the dust collector 12 through the high-pressure sandblasting suction pipe 7, directly drawing in filtered clean air. After being accelerated and pressurized by the impeller of the sandblasting high-pressure blower 3, the clean air is pressured to 0.4-0.6MPa and sprayed onto the surface of steel plate 2 through the sandblasting nozzle 8 at an airflow speed of 30-50m / s, removing residual dust and loose particles from the surface of steel plate 2.

[0053] The air volume of the sandblasting high-pressure blower 3 is precisely controlled by the suction regulating valve 6. The valve opening is driven by an electric actuator and can be dynamically adjusted within a certain rated air volume range. For example, when processing 3mm thin steel plate 2, the air volume is set to 30% to prevent damage, and when processing 10mm thick steel plate 2, the air volume is set to 100% to enhance purging.

[0054] The processed steel plate 2 is conveyed to the next process through the discharge port 16 of the conveying system.

[0055] Reference Figure 3 The airflow circulation path during the operation of the flatbed sandblasting machine is as follows:

[0056] First, there is the collection of polluted air: the sandblasting chamber 1 is divided into three independent areas, including the first dust removal chamber 13, the second dust removal chamber 14, and the third dust removal chamber 15. The amount of polluted air generated in each area is a1, a2, and a3, respectively, and the total air volume a = a1 + a2 + a3. The air inlet of the chamber's main air intake pipe 9 is connected to the air outlet opened at the top of the first dust removal chamber 13, the second dust removal chamber 14, and the third dust removal chamber 15, so as to collect the dust-laden airflow to the polluted air inlet 121 of the dust collector 12, ensuring that the dust-laden airflow in each area of ​​the sandblasting chamber 1 is collected efficiently.

[0057] Then, after purification and diversion: polluted air is treated by dust collector 12, and clean air is diverted through a dual-path system at the outlet end. Circulating air branch: the first clean air outlet 1221 outputs circulating air volume b1, which is transported to the high-pressure blower 3 via the high-pressure blower suction pipe 7. After pressurization, it returns to the sandblasting chamber 1 through the blower nozzle 8, forming an internal circulation. External exhaust air branch: the second clean air outlet 1222 outputs external exhaust air volume b2, which is discharged through the dust removal exhaust pipe 11 via the external exhaust fan 10, meeting emission standards. Only the minimum air volume required to maintain negative pressure in the chamber is retained, b2 = a - b1.

[0058] Finally, the circulation regulation is achieved: the suction regulating valve 6 on the high-pressure sand blowing suction pipe 7 can adjust the circulating air volume b1 according to the processing requirements of the steel plate 2, so as to optimize the system air volume.

[0059] Example 2:

[0060] Reference Figure 4 A flatbed sandblasting machine for blowing sand and removing dust is different from the first embodiment in that the sandblasting high-pressure blower 3 is installed outdoors and is connected to the sandblasting nozzles 8 of the second dust removal chamber 14 and the third dust removal chamber 15 through the air supply pipe 18.

[0061] Two sandblasting high-pressure blowers 3 are connected in parallel and installed together with the dust collector 12 on a special equipment platform outdoors, maintaining a certain distance from the workshop wall. The air outlet of each sandblasting high-pressure blower 3 is connected to the sandblasting nozzle 8 of the second dust removal chamber 14 and the third dust removal chamber 15 through the air supply pipe 18.

[0062] This layout design allows for flexible use of the number of fans based on actual workload, reducing energy consumption. Furthermore, moving the fans outdoors significantly reduces noise pollution within the workshop and facilitates equipment maintenance and repair.

[0063] In addition, to further reduce noise, the air supply duct 18 is designed with a double-layer structure, with an inner layer of stainless steel and an outer layer of sound insulation cotton, resulting in a noise reduction of ≥15dB; at the same time, a flexible joint is used at the connection between the fan and the air supply duct 18 to reduce vibration transmission and lower noise.

[0064] Rain shelters and sun-proof and heat-insulating layers can also be installed in outdoor equipment areas to protect the equipment and extend its service life.

[0065] The implementation principle of this utility model is as follows: by constructing an internal circulation ventilation system, the synergistic operation of sandblasting, dust removal, and energy saving is achieved. The specific principle is as follows:

[0066] Firstly, there is the collection of polluted air and the maintenance of negative pressure. During shot blasting and sand blowing operations, dust-laden airflow is generated in the sandblasting chamber 1. The main suction pipe 9 of the chamber collects the polluted air (total air volume a) from each area (first dust removal chamber 13, second dust removal chamber 14, and third dust removal chamber 15) through the suction ports distributed on the top and side walls and gathers it to the polluted air inlet 121 of the dust collector 12. At the same time, a constant negative pressure of -30Pa to -50Pa is maintained in the sandblasting chamber 1 (in accordance with the JB / T10341 "Sandblasting Machine" standard) to ensure that no dust overflows.

[0067] Secondly, there is the purification, diversion, and recycling. After the dust collector 12 filters the polluted air, the clean air is functionally diverted through the dual outlets:

[0068] Circulating air volume b1: Circulating air volume b1 is output from the first clean air outlet 1221 and enters the high-pressure blower 3 through the high-pressure blower suction pipe 7. After being pressurized to 0.4-0.6MPa, it is sprayed onto the surface of the steel plate 2 through the blower nozzle 8 to remove residual impurities. The dust-laden airflow generated by blowing is collected again by the chamber suction main pipe 9, forming a closed loop of "blowing → dust generation → collection → purification → reuse".

[0069] External exhaust volume b2: The output b2 (b2 = a - b1) from the second clean air outlet 1222 is only retained to maintain the minimum air volume required to maintain negative pressure. It is discharged in compliance with standards through the external exhaust fan 10 and the dust removal exhaust gas discharge main pipe 11 to avoid excessive emissions.

[0070] In the traditional solution, the total air volume a needs to be completely discharged (i.e., b1=0, b2=a), which requires a large air volume and high power exhaust fan 10 (e.g., 55kW). This results in high energy consumption and large exhaust emissions, for example, the total air volume (a=10000m3 / h) is completely discharged.

[0071] This invention constructs an internal circulation channel. By changing the air inlet of the sandblasting high-pressure blower 3 to draw air from the dust removal system pipeline, the circulation volume b1 is recycled. 30% of the purified air can be used as the circulation volume b1 (b1 = 0.3a), and the exhaust volume is reduced from a to b2 (b2 = 0.7a) (e.g., after improvement, the exhaust volume is 7000 m3 / h). The power of the matching exhaust fan 10 can be reduced by 30% (e.g., replaced with 37kW). Under rated operating conditions, the measured system power consumption is reduced by 28%-32%, achieving the dual goals of "emission reduction" and "energy saving".

[0072] This invention utilizes a closed-loop system of "efficient collection of polluted air → purified and circulated in separate channels → air volume adjustment as needed" and internal circulation and precise diversion technology to fundamentally change the high-consumption mode of the traditional sandblasting machine of "all in and all out". While maintaining the sandblasting quality, it achieves the core effects of reducing waste gas emissions and energy consumption.

[0073] 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 flat-plate sandblasting machine for sand blowing, dust removal, and energy saving, comprising a sandblasting chamber body (1) consisting of multiple interconnected dust removal chambers and sandblasting chambers (19), and a high-pressure sandblasting blower (3), characterized in that, It also includes a high-pressure sand blowing suction pipe (7), a chamber suction main pipe (9), a dust collector (12) and an external exhaust fan (10); The dust collector (12) is connected to each of the dust removal chambers through the chamber body suction main pipe (9) to collect and purify the dust-containing gas in each of the dust removal chambers; The air purified by the dust collector (12) is connected to the air inlet of the high-pressure blower (3) through the high-pressure blower suction pipe (7) to clean the residual impurities on the surface of the steel plate (2); The exhaust gas purified by the dust collector (12) is discharged to the outside through the exhaust fan (10).

2. A sand-blasting, dust-removing and energy-saving flat plate sand-blasting machine according to claim 1, characterized in that, The dust collector (12) has a polluted air inlet (121) and a clean air outlet (122). The polluted air inlet (121) is connected to each of the dust removal chambers through the chamber body air intake manifold (9); The clean air outlet (122) includes a first clean air outlet (1221) and a second clean air outlet (1222); the first clean air outlet (1221) is connected to the sandblasting high-pressure blower (3) through the high-pressure sandblasting suction pipe (7) to form a circulation system; the second clean air outlet (1222) is connected to the dust removal exhaust gas discharge main pipe (11) through the exhaust fan (10); The total air volume of the chamber's main air intake pipe (9) is a, the air volume of the first clean air outlet (1221) is b1, and the air volume of the second clean air outlet (1222) is b2, and a = b1 + b2 is satisfied.

3. The flatbed sandblasting machine for sandblasting, dust removal, and energy saving according to claim 1, characterized in that, The plurality of dust removal chambers include a first dust removal chamber (13), a second dust removal chamber (14) and a third dust removal chamber (15). The first dust removal chamber (13) and the second dust removal chamber (14) are respectively connected to both sides of the sandblasting chamber (19); the second dust removal chamber (14) and the third dust removal chamber (15) are connected in series along the traveling direction of the steel plate (2).

4. A sand-blasting, dust-removing energy-saving flat plate sand-blasting machine according to claim 3, characterized in that, The top of the second dust removal chamber (14) and the third dust removal chamber (15) are both connected to a sandblasting nozzle (8), and the spraying direction of the sandblasting nozzle (8) is towards the travel path of the steel plate (2).

5. A sand-blasting, dust-removing energy-saving flat plate sand-blasting machine according to claim 4, characterized in that, The high-pressure blower (3) is respectively installed at the top of the second dust removal chamber (14) and the top of the third dust removal chamber (15), and the air outlet of the high-pressure blower (3) is directly connected to the sandblasting nozzle (8).

6. A sand-blasting, dust-removing energy-saving flat plate sand-blasting machine according to claim 4, characterized in that, The sandblasting high-pressure blower (3) and the dust collector (12) are installed outdoors. Each sandblasting high-pressure blower (3) has an air supply pipe (18) connected to its air outlet. The air supply pipe (18) is connected to the sandblasting nozzle (8) corresponding to the second dust removal chamber (14) and the third dust removal chamber (15), respectively.

7. A sand-blasting, dust-removing and energy-saving flat plate sand-blasting machine according to claim 1, characterized in that, The high-pressure sand blowing suction pipe (7) is equipped with a suction regulating valve (6).

8. A sand-blasting, dust-removing and energy-saving flat plate sand-blasting machine according to claim 1, characterized in that, Also included is a shot blasting machine (5) installed on the top of the sanding chamber (19) for high-speed projection of steel sand (4) to the surface of the steel plate (2).

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