A sand blasting machine with abrasive drying function

Abstract

The utility model provides a kind of sand blasting machine with abrasive drying function, comprising: sand blasting box, the bottom of sand blasting box is communicated with aggregate hopper, the inner wall lower end of sand blasting box is fixedly connected with sand filter plate;Conveying part, the conveying part is installed in the bottom of aggregate hopper, the bottom of conveying part is equipped with lock valve, another end of lock valve is communicated with sand supply tank connected with sand blasting box suction system;Temperature rising part, the temperature rising part is arranged outside the aggregate hopper;Gas delivery part, the gas delivery part one end is installed on the temperature rising part, and it is communicated with the aggregate hopper and the conveying part;The sand blasting machine with abrasive drying function is heated directly to the abrasive in aggregate hopper by temperature rising part and gas delivery part cooperation, while inputting high-temperature airflow into aggregate hopper, ensuring the uniformity of abrasive drying, and can take off the water-containing waste gas generated during abrasive drying, and is handled by processing part, ensuring the drying quality of abrasive.

Description

Technical Field

[0001] This utility model relates to the field of sandblasting machine technology, and more specifically, to a sandblasting machine with abrasive drying function. Background Technology

[0002] Sandblasting is a process that uses the impact of high-speed sand jets to clean and roughen the surface of a substrate. It uses compressed air as power to form a high-speed jet stream that propels the abrasive material onto the surface of the workpiece to be treated, causing changes in the physical state or microstructure of the workpiece surface. In the field of industrial surface treatment, sandblasting machines are widely used in processes such as rust removal, oxide layer removal, and surface roughening.

[0003] In high-humidity environments such as ship repair and coastal factories, the abrasive is prone to absorbing moisture and clumping when the sandblasting machine is working, leading to nozzle blockage, uneven sandblasting, and increased abrasive wear.

[0004] Existing drying methods mostly use external dryers to pre-dry abrasives. During the drying process, heat loss is significant, and the process is cumbersome, requiring machine shutdown and abrasive transfer. At the same time, the hot and humid exhaust gas generated during the abrasive drying process cannot be effectively discharged and treated, which may lead to internal corrosion of the equipment and secondary dampness of the abrasive. Some equipment directly heats the abrasive in the conveyor to dry it, but abrasive clumps will still form in the collection hopper, which will affect the conveying of the abrasive. Utility Model Content

[0005] The purpose of this invention is to provide a sandblasting machine with an abrasive drying function to solve the above-mentioned problems.

[0006] To achieve the above objectives, this utility model provides a sandblasting machine with abrasive drying function, comprising: a sandblasting box, a material collection hopper connected to the bottom of the sandblasting box, and a filter plate fixedly connected to the lower end of the inner wall of the sandblasting box;

[0007] The conveying unit is installed at the bottom of the collecting hopper. An air lock valve is installed at the bottom of the conveying unit, and the other end of the air lock valve is connected to a sand supply box that is connected to the sandblasting box suction system.

[0008] A heating section is disposed outside the collecting hopper;

[0009] A gas conveying section, one end of which is installed on the heating section and connected to the collecting hopper and the conveying section;

[0010] A processing unit, installed on the gas delivery unit, is used to filter the airflow in the gas delivery unit, wherein:

[0011] The conveying unit is driven to cooperate with the airlock valve to slowly convey the abrasive in the collecting hopper to the sand supply box;

[0012] The heating section, in conjunction with the gas conveying section, is used to centrally heat the abrasive in the collecting hopper while simultaneously heating the abrasive being slowly conveyed in the conveying section.

[0013] Furthermore, the heating section includes a heat insulation cover fixedly sleeved on the outside of the collection hopper; a heating cavity disposed between the heat insulation cover and the collection hopper; and a plurality of heating plates disposed in the heating cavity and mounted on the heat insulation cover.

[0014] Furthermore, the conveying unit includes a first motor installed on the top of the sand supply box, a first conveying auger rotatably installed at the bottom of the collection hopper, a conveying pipe fixed at the bottom of the collection hopper, a second conveying auger rotatably installed inside the conveying pipe and fixed to the output end of the first motor, two transmission gears respectively fixed at one end of the first conveying auger and the second conveying auger, a transmission toothed belt meshing with the two transmission gears, an upper conveying pipe disposed at one end of the conveying pipe and used to connect the conveying pipe and the collection hopper, and a lower conveying pipe disposed at the other end of the conveying pipe and used to connect the conveying pipe and the airlock valve.

[0015] Furthermore, the processing unit includes a processing box fixed to the top of the sand supply box; a collection drawer slidably installed inside the processing box; several assembly racks fixed inside the collection drawer; filter plates and several moisture-absorbing plates respectively attached to and slidably inserted into the several assembly racks; two vents symmetrically opened on the collection drawer; and two sealing rings respectively fixed on both sides of the collection drawer and corresponding to the two vents respectively.

[0016] Furthermore, the air conveying unit includes a fan installed on the top of the sand supply box, a connecting pipe for connecting the air inlet of the fan to one side of the processing box; an air conveying pipe with one end connected to the heating chamber and the other end connected to the lower conveying pipe; an air inlet pipe with one end connected to the air outlet of the fan and the other end connected to the heating chamber; and an exhaust pipe with one end extending into the collection hopper and the other end connected to the other side of the processing box.

[0017] The two vents correspond to the connecting pipe and the exhaust pipe, respectively.

[0018] Furthermore, a second motor is installed on the outer wall of the hopper, and a stirring shaft that is fixedly connected to the output end of the second motor is rotatably connected inside the hopper. Several mixing blades are fixedly connected in a ring array on the outer wall of the stirring shaft.

[0019] Furthermore, a filter cap is threadedly connected to one end of the exhaust pipe.

[0020] Compared with the prior art, the embodiments of this utility model have the following beneficial effects:

[0021] This sandblasting machine with abrasive drying function heats the collection hopper through a heating section, and works in conjunction with a stirring shaft to control several mixing blades to stir and mix the abrasive, effectively improving the drying quality of the abrasive in the collection hopper, avoiding accumulation that leads to localized dampness and ineffective drying, and effectively breaking up abrasive clumps to avoid affecting the conveying of abrasive. At the same time, with the cooperation of the air conveying section, the heat generated by the heating section can be carried by the airflow to the conveying section, and then enter the collection hopper through the conveying section. Due to the diameter limitation of the conveying section, the abrasive conveyed in a single batch can effectively contact the high-temperature airflow, achieving dual drying of the abrasive in conjunction with the heating section, ensuring the drying efficiency and effect of the abrasive, and avoiding problems such as conveying blockage and uneven sandblasting caused by damp abrasive clumping.

[0022] This sandblasting machine with abrasive drying function, through its processing section and air conveying section, dries the abrasive in the collection hopper with high-temperature airflow. The used exhaust gas can then be passed into the processing box for dust removal and dehumidification, thus avoiding the problems of internal corrosion and secondary moisture in the abrasive caused by ineffective treatment of moisture-containing exhaust gas. Furthermore, the treated exhaust gas is reheated in the heating section for reuse, effectively improving thermal energy utilization, ensuring thermal efficiency, and reducing energy consumption. After the abrasive is conveyed by the conveying section, it finally enters the sand supply box through the airlock valve. This airlock valve can isolate the hot airflow during material conveying, preventing backflow and avoiding interference from the heated airflow during the operation of the sandblasting box's suction system. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Figure 1 A perspective view of the present invention is shown;

[0025] Figure 2 A partial perspective view of the present invention is shown;

[0026] Figure 3 This invention provides a partially cross-sectional perspective view. Figure 1 ;

[0027] Figure 4 This invention demonstrates a partially disassembled three-dimensional representation. Figure 1 ;

[0028] Figure 5 This invention provides a partially cross-sectional perspective view. Figure 2 ;

[0029] Figure 6 This invention demonstrates a partially disassembled three-dimensional representation. Figure 2 .

[0030] In the picture

[0031] 1. Sandblasting box; 2. Collection hopper; 3. Filter plate; 4. Conveying section; 5. Airlock valve; 6. Sand supply box; 7. Heating section; 8. Air supply section; 9. Processing section; 10. Heat insulation cover; 11. Heating chamber; 12. Heating plate; 13. First motor; 14. First conveying auger; 15. Conveying pipe; 16. Second conveying auger; 17. Transmission gear; 18. Transmission belt; 19. Upper conveying pipe; 20. Lower conveying pipe; 21. Processing box; 22. Collection drawer; 23. Assembly frame; 24. Filter plate; 25. Moisture absorption plate; 26. Vent; 27. Sealing ring; 28. Fan; 29. ​​Connecting pipe; 30. Air supply pipe; 31. Air inlet pipe; 32. Exhaust pipe; 33. Second motor; 34. Stirring shaft; 35. Mixing blade; 36. Filter cover. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0033] like Figure 1-6 As shown, a sandblasting machine with abrasive drying function includes: a sandblasting box 1, a material collection hopper 2 connected to the bottom of the sandblasting box 1, and a filter plate 3 fixedly connected to the lower end of the inner wall of the sandblasting box 1.

[0034] Conveying section 4, the conveying section 4 is installed at the bottom of the collecting hopper 2, the bottom of the conveying section 4 is equipped with an air lock valve 5, and the other end of the air lock valve 5 is connected to a sand supply box 6 connected to the sandblasting box 1 suction system;

[0035] Heating unit 7, the heating unit 7 being disposed outside the collecting hopper 2;

[0036] Gas conveying section 8, one end of which is installed on heating section 7 and connected to collecting hopper 2 and conveying section 4;

[0037] Processing unit 9, which is installed on the air supply unit 8, is used to filter the airflow in the air supply unit 8, wherein:

[0038] The conveying unit 4 is driven to cooperate with the airlock valve 5 to slowly convey the abrasive in the collecting hopper 2 to the sand supply box 6;

[0039] The heating section 7, in conjunction with the gas conveying section 8, is used to centrally heat the abrasive in the collecting hopper 2 while simultaneously heating the abrasive being slowly conveyed in the conveying section 4.

[0040] When the sandblasting chamber 1 is working, the abrasive after sandblasting is filtered by the sand filter plate 3 and falls into the collection hopper 2, blocking large particles of impurities generated during sandblasting. At this time, under the rotation of the stirring shaft 34, several mixing blades 35 continuously stir, effectively preventing the abrasive from clumping. At the same time, several heating plates 12 generate high temperature in the heating chamber 11. The heat is evenly conducted to the abrasive in the collection hopper 2 through the metal wall of the collection hopper 2, heating and drying the abrasive. Combined with the stirring of the abrasive by the mixing blades 35, the heating uniformity of the abrasive can be effectively improved, avoiding local accumulation of abrasive that would affect the drying effect.

[0041] Subsequently, during the operation of the conveying unit 4, the abrasive material at the bottom of the collecting hopper 2 is pushed to the conveying pipe 15 by the first conveying auger 14. It is then continuously conveyed by the second conveying auger 16 in the conveying pipe 15 to ensure the continuity of material supply. At the same time, with the cooperation of the air conveying unit 8 and the processing unit 9, the humid and hot exhaust gas generated by the drying of the abrasive in the collecting hopper 2 can be conveyed into the processing box 21 through the exhaust pipe 32. Through the cooperation of the filter plate 24 and several moisture-absorbing plates 25 in the processing box 21, the dust and water vapor in the humid and hot exhaust gas are intercepted. The purified gas is sent back to the heating chamber 11 by the fan 28 for reuse. The heated airflow is conveyed to the conveying pipe 15 by the air conveying pipe 30 to achieve synchronous drying during the abrasive conveying process, further improving the drying quality of the abrasive. At the same time, the closed-loop heat circulation effectively improves the heat energy utilization rate of the several heating plates 12, reduces energy consumption, and avoids the retention of humid and hot airflow in the sandblasting box 1, preventing the humid and hot airflow from causing internal corrosion of the equipment or secondary dampness of the abrasive.

[0042] Optionally, the heating section 7 includes a heat insulation cover 10 fixedly sleeved on the outside of the collecting hopper 2; a heating cavity 11 disposed between the heat insulation cover 10 and the collecting hopper 2; and a plurality of heating plates 12 disposed in the heating cavity 11 and mounted on the heat insulation cover 10.

[0043] In use, several heating plates 12 generate high temperatures, heating the air inside the heating chamber 11 through thermal radiation and convection. The high-temperature air conducts heat to the metal wall of the collecting hopper 2, and then indirectly to the abrasive inside, thereby heating and drying the abrasive. The jacketed heating chamber 11 surrounds the collecting hopper 2, and the heat penetrates evenly from all sides, avoiding local overheating or insufficient drying, which can improve the consistency of abrasive drying and ensure the quality of sandblasting surface treatment. The heat insulation cover 10 can reduce heat loss, and the closed design of the heating chamber 11 can improve thermal efficiency. In addition, the power of several heating plates 12 can be adjusted by an external temperature control module to maintain the set temperature. At the same time, it can be used in conjunction with the air conveying unit 8. The air conveying pipe 30 in the air conveying unit 8 can introduce part of the hot air passing through the heating chamber 11 into the conveying pipe 15 to reheat the abrasive in the conveying process. After the abrasive is heated in the collecting hopper 2, the moisture evaporates, and the hot and humid exhaust gas enters the processing unit 9 through the exhaust pipe 32 for filtration treatment.

[0044] Optionally, the conveying unit 4 includes a first motor 13 installed on the top of the sand supply box 6, a first conveying auger 14 rotatably installed at the bottom of the collection hopper 2; a conveying pipe 15 fixed at the bottom of the collection hopper 2; a second conveying auger 16 rotatably installed inside the conveying pipe 15 and fixed to the output end of the first motor 13; two transmission gears 17 respectively fixed at one end of the first conveying auger 14 and the second conveying auger 16; a transmission toothed belt 18 meshing with the two transmission gears 17; an upper conveying pipe 19 disposed at one end of the conveying pipe 15 and used to connect the conveying pipe 15 to the collection hopper 2; and a lower conveying pipe 20 disposed at the other end of the conveying pipe 15 and used to connect the conveying pipe 15 to the airlock valve 5.

[0045] By cooperating with the second auger and using a gear-driven synchronous drive design, the abrasive is conveyed from the collection hopper 2 to the sand supply box 6 in a closed, continuous, and controllable manner. During operation, the first motor 13 operates, driving the second auger 16 to rotate. With the cooperation of the transmission belt 18 and two transmission gears 17, the second auger 16 rotates in the same direction at the same speed, ensuring a consistent conveying rate. The spiral directions of the first and second augers 14 are opposite, so that during operation, the first auger 14 conveys the abrasive deposited in the collection hopper 2. The abrasive is pushed axially to the upper feed pipe 19. The second conveying auger 16 pushes the abrasive from the upper feed pipe 19 through the conveying pipe 15 into the lower feed pipe 20. The first conveying auger 14 and the second conveying auger 16 cooperate to convey the abrasive, ensuring a stable connection and continuous supply, and guaranteeing the continuity of the sandblasting operation. The conveying pipe 15 is wrapped with hot air from the air supply pipe 30, and the abrasive is dried twice during the conveying process. The abrasive finally enters the sand supply box 6 through the airlock valve 5. This valve isolates the hot air through rotating blades to prevent backflow of airflow, thereby avoiding interference from the heated airflow when the suction system of the sandblasting box 1 is working.

[0046] Optionally, the processing unit 9 includes a processing box 21 fixed to the top of the sand supply box 6; a collection drawer 22 slidably installed in the processing box 21; a plurality of assembly racks 23 fixed in the collection drawer 22; filter plates 24 and a plurality of moisture-absorbing plates 25 respectively fitted and slidably inserted in the plurality of assembly racks 23; two vents 26 symmetrically opened on the collection drawer 22; and two sealing rings 27 respectively fixed on both sides of the collection drawer 22 and corresponding to the two vents 26.

[0047] When the air supply section 8 is working, the high-temperature and high-humidity exhaust gas generated by the drying of moist abrasive in the sandblasting box 1 carries some dust and is sucked into the treatment box 21 through the exhaust pipe 32. The filter plate 24 in the treatment box 21 can be a metal filter screen or a sintered porous plate to effectively separate the dust in the exhaust gas. Then, several moisture-absorbing plates 25 are set to effectively absorb the water vapor in the exhaust gas, preventing water vapor from condensing and causing the abrasive to become damp. The purified dry hot air enters the fan 28 through the connecting pipe 29 and then returns to the heating chamber 11 for reuse through the air inlet pipe 31. When the filter plate 24 is covered with dust or several moisture-absorbing plates 25 are saturated, the collection drawer 22 can be quickly slid out for replacement and cleaning, reducing downtime and improving production efficiency. The two air vents 26 and the two sealing rings 27 cooperate to form an airtight connection to ensure the sealing of the connection between the connecting pipe 29, the exhaust pipe 32 and the collection drawer 22 in the air supply section 8, ensuring stable negative pressure and preventing dust from overflowing. The moisture-absorbing plates 25 can be made of modified silica gel to ensure the absorption effect of water vapor.

[0048] Optionally, the air supply unit 8 includes a fan 28 installed on the top of the sand supply box 6, a connecting pipe 29 for connecting the air inlet of the fan 28 to one side of the processing box 21; an air supply pipe 30 with one end connected to the heating chamber 11 and the other end connected to the lower material supply pipe 20; an air inlet pipe 31 with one end connected to the air outlet of the fan 28 and the other end connected to the heating chamber 11; and an exhaust pipe 32 with one end extending into the collection hopper 2 and the other end connected to the other side of the processing box 21.

[0049] The two vents 26 correspond to the connecting pipe 29 and the exhaust pipe 32, respectively;

[0050] During operation, the blower 28 starts, drawing purified air from the processing chamber 21 and sending it into the heating chamber 11 through the air inlet pipe 31. After being heated by the heating plate 12 in the heating chamber 11, it forms high-temperature dry air. Then, the hot air is introduced into the conveying pipe 15 through the air delivery pipe 30, which further heats the abrasive being slowly conveyed in the conveying pipe 15. The hot air from the conveying pipe 15 also enters the collecting hopper 2 to assist the heating unit 7 in drying the abrasive in the collecting hopper 2. The water vapor and dust evaporated from the abrasive are transported to the processing unit 9 through the exhaust pipe 32. The hot air, combined with the heating unit 7, achieves dual heating. At the same time, due to the diameter limitation of the conveying pipe 15 in the conveying unit 4, the contact effect between the hot airflow and the abrasive is ensured, thereby effectively improving the heating uniformity of the abrasive, ensuring drying efficiency, and avoiding localized dampness. In addition, the hot air is a closed-loop drying system, and the heat energy can be reused, thereby effectively reducing energy consumption.

[0051] Optionally, a second motor 33 is installed on the outer wall of the collecting hopper 2, and a stirring shaft 34 is rotatably connected to the output end of the second motor 33 inside the collecting hopper 2. Several mixing blades 35 are fixedly connected in a ring array on the outer wall of the stirring shaft 34. In use, the second motor 33 drives the stirring shaft 34 to rotate, so that the several mixing blades 35 break up the agglomerated abrasive and stir it, effectively avoiding the accumulation of abrasive and causing local moisture. This effectively improves the heat of the heating section 7 and the air conveying section 8, and allows the hot air to come into more comprehensive contact with the abrasive, improving the drying effect. At the same time, the broken abrasive is easier to convey by the conveying section 4.

[0052] Optionally, one end of the exhaust pipe 32 is threadedly connected to a filter cover 36; the filter cover 36 can cover the inlet of the exhaust pipe 32, intercept large particles of impurities, thereby preventing abrasive from entering the processing box 21 through the exhaust pipe 32, achieving a pre-filtration effect, reducing the load on the processing unit 9, and since the filter cover 36 is assembled by a threaded connection, it is convenient to replace and maintain.

[0053] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A sandblasting machine with an abrasive drying function, characterized in that, include: A sandblasting box (1) is connected to a material collection hopper (2) at the bottom, and a filter plate (3) is fixedly connected to the lower end of the inner wall of the sandblasting box (1). The conveying unit (4) is installed at the bottom of the hopper (2). An air lock valve (5) is installed at the bottom of the conveying unit (4). The other end of the air lock valve (5) is connected to a sand supply box (6) connected to the sandblasting box body (1) suction system. Heating section (7), the heating section (7) is disposed outside the collecting hopper (2); Gas delivery section (8), one end of which is installed on the heating section (7) and connected to the collection hopper (2) and the conveying section (4); Processing unit (9), which is installed on the gas delivery unit (8), is used to filter the airflow in the gas delivery unit (8), wherein: Drive the conveying unit (4) to work with the airlock valve (5) to slowly convey the abrasive in the collection hopper (2) to the sand supply box (6); The heating section (7) works in conjunction with the gas conveying section (8) to heat the abrasive in the hopper (2) in a concentrated manner, while simultaneously heating the abrasive being slowly conveyed in the conveying section (4).

2. A sandblasting machine with abrasive drying function as described in claim 1, characterized in that, The heating section (7) includes a heat insulation cover (10) fixedly sleeved on the outside of the collection hopper (2); a heating chamber (11) disposed between the heat insulation cover (10) and the collection hopper (2); and a plurality of heating plates (12) disposed in the heating chamber (11) and mounted on the heat insulation cover (10).

3. A sandblasting machine with abrasive drying function as described in claim 2, characterized in that, The conveying unit (4) includes a first motor (13) installed on the top of the sand supply box (6), a first conveying auger (14) rotatably installed at the bottom of the collection hopper (2); a conveying pipe (15) fixed at the bottom of the collection hopper (2); a second conveying auger (16) rotatably installed in the conveying pipe (15) and fixed to the output end of the first motor (13); two transmission gears (17) respectively fixed at one end of the first conveying auger (14) and the second conveying auger (16); a transmission toothed belt (18) meshing with the two transmission gears (17); an upper conveying pipe (19) provided at one end of the conveying pipe (15) and used to connect the conveying pipe (15) and the collection hopper (2); and a lower conveying pipe (20) provided at the other end of the conveying pipe (15) and used to connect the conveying pipe (15) and the airlock valve (5).

4. A sandblasting machine with abrasive drying function as described in claim 3, characterized in that, The processing unit (9) includes a processing box (21) fixed to the top of the sand supply box (6); a collection tray (22) slidably installed in the processing box (21); a plurality of assembly racks (23) fixed in the collection tray (22); filter plates (24) and a plurality of moisture-absorbing plates (25) respectively fitted and slidably inserted in the plurality of assembly racks (23); two vents (26) symmetrically opened on the collection tray (22); and two sealing rings (27) respectively fixed on both sides of the collection tray (22) and corresponding to the two vents (26).

5. A sandblasting machine with abrasive drying function as described in claim 4, characterized in that, The air supply unit (8) includes a blower (28) installed on the top of the sand supply box (6), a connecting pipe (29) for connecting the air inlet of the blower (28) to one side of the processing box (21); an air supply pipe (30) with one end connected to the heating chamber (11) and the other end connected to the lower material supply pipe (20); an air inlet pipe (31) with one end connected to the air outlet of the blower (28) and the other end connected to the heating chamber (11); and an exhaust pipe (32) with one end extending into the collection hopper (2) and the other end connected to the other side of the processing box (21). The two vents (26) correspond to the connecting pipe (29) and the exhaust pipe (32), respectively.

6. A sandblasting machine with abrasive drying function as described in claim 5, characterized in that, The outer wall of the hopper (2) is equipped with a second motor (33), and the hopper (2) is rotatably connected to a stirring shaft (34) which is fixedly connected to the output end of the second motor (33). The outer wall of the stirring shaft (34) is fixedly connected with several mixing blades (35) in a ring array.

7. A sandblasting machine with abrasive drying function as described in claim 6, characterized in that, One end of the exhaust pipe (32) is threadedly connected to a filter cap (36).

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