An automatic liquid supply wet sand blasting machine

Abstract

The utility model provides a kind of wet sand blasting machine of automatic liquid supply, comprising: sand blasting box, the bottom of sand blasting box is communicated with collection hopper, the bottom of collection hopper is communicated with processing box, and processing box is divided into wet material cavity and wastewater cavity by partition in it;Primary separation part, separation part is installed in processing box, for the abrasive in waste material after sand blasting is respectively input wet material cavity and wastewater cavity with wastewater;Secondary separation part, secondary separation part is fixed on the outer wall of sand blasting box, the wet sand blasting machine of this automatic liquid supply can be stably supplied mixed uniform sand material to sand blasting box by setting liquid supply part and mixing part cooperation, ensure sand blasting effect, and under the cooperation of primary separation part and secondary separation part, abrasive and wastewater after use can be recycled and separated, and purified water is retransmitted to liquid supply part, and then abrasive automatic recovery and liquid supply are realized, abrasive consumption and wastewater discharge are greatly reduced, and the efficiency and environmental protection of sand blasting operation are improved.

Description

Technical Field

[0001] This utility model relates to the field of sandblasting machine technology, and more specifically, to an automatic liquid-supplying wet sandblasting machine. Background Technology

[0002] Wet blasting machines propel a mixture of hard abrasives such as steel shot and water at high speed onto the surface of a workpiece, effectively removing iron oxide scale and other impurities. Wet blasting machines offer significant advantages, including high surface cleaning efficiency, a bright and uniform finish, long-lasting rust prevention, easy start-up and shutdown, dust-free operation, and virtually no emissions, making them environmentally friendly and beneficial to factories, operators, and the environment.

[0003] However, existing wet sandblasting machines have some defects or shortcomings: Low abrasive recovery rate: After sandblasting, the abrasive mixes with the wastewater. Traditional equipment only separates the abrasive through simple filtration or sedimentation, resulting in a large amount of abrasive being lost with the wastewater, leading to a low recovery rate and increased production costs.

[0004] Unstable liquid supply: Since a continuous supply of abrasive is required during sandblasting, traditional mixing devices are prone to abrasive deposition or uneven mixing during continuous material mixing, resulting in inconsistent sandblasting effects and affecting processing quality. Utility Model Content

[0005] The purpose of this invention is to provide an automatic liquid-supplying wet sandblasting machine to solve the above-mentioned problems.

[0006] To achieve the above objectives, this utility model provides an automatic liquid supply wet sandblasting machine, comprising: a sandblasting box, the bottom of which is connected to a material collection hopper, the bottom of which is connected to a processing box, and the processing box being divided into a wet material chamber and a wastewater chamber by a partition. The initial separation section is installed inside the processing box and is used to input the abrasive and wastewater in the waste material after sandblasting into the wet material chamber and the wastewater chamber, respectively. The secondary separation section is fixed on the outer wall of the sandblasting box and is used to separate crushed abrasives from the wastewater. A liquid supply unit is located on one side of the sandblasting box and is used to provide raw materials for sandblasting. A mixing section is installed inside the liquid supply section to agitate the abrasive and liquid in the liquid supply section. The material conveying unit is installed on the processing tank, the secondary separation unit and the liquid supply unit, and is used to convey the materials processed by the primary separation unit, the secondary separation unit and the liquid supply unit.

[0007] Furthermore, the liquid supply unit includes a support frame placed on the ground, a liquid supply tank fixed to the upper end of the support frame, a mixing tank fixed to the upper end of the liquid supply tank, a sealing cover installed on the upper end of the mixing tank, a feed frame connected to the sealing cover, a discharge pipe connected to the bottom of the mixing tank, and a solenoid valve installed on the discharge pipe.

[0008] Furthermore, the mixing unit includes a first rotating tube and a second rotating tube respectively rotatably installed in the liquid supply tank and the mixing tank, a mating toothed ring fixed to the bottom of the first rotating tube, a toothed groove opened on the top of the second rotating tube and meshing with the mating toothed ring, two mixing components respectively provided on the first rotating tube and the second rotating tube, a drive motor fixed to the top of the sealing cover, and a limiting frame fixed to the top of the sealing cover and rotatably connected to the first rotating tube; The output end of the drive motor is connected to the first rotating tube via a bevel gear set.

[0009] Furthermore, the mixing section also includes a rotary joint installed on the top of the first rotating tube and an air supply pipe fixed to the limiting frame by clamps; The mixing component includes a plurality of stirring tubes connected in a ring array to the first rotating tube or the second rotating tube, a plurality of interference flow rods fixed at equal intervals at the upper ends of the plurality of stirring tubes, and a plurality of jet nozzles opened at equal intervals at the bottom of the plurality of stirring tubes located at the bottom of the plurality of stirring tubes at the lowest point of the first rotating tube or the second rotating tube. One end of the gas pipeline is connected to an external high-pressure gas supply system, and the other end is connected to the rotary joint.

[0010] Furthermore, the initial separation section includes two drive wheels rotatably mounted in the processing box, a filter conveyor belt sleeved on the outside of the two drive wheels and inclined, a control motor fixed outside the processing box, a number of blocking blocks fixed at equal intervals on the filter conveyor belt, and a collection frame slidably mounted in the wet material chamber. The output end of the control motor is fixedly connected to one of the transmission wheels; The upward-sloping end of the filter conveyor belt is located inside the wet material chamber, and the downward-sloping end of the filter conveyor belt is located directly below the collecting hopper.

[0011] Furthermore, the secondary separation section includes a separation box fixed to the outer wall of the sandblasting box, a filter sleeve fixed inside the separation box, a drain pipe installed at the bottom of the separation box and connected to the lower end of the filter sleeve, and a valve installed on the drain pipe.

[0012] Furthermore, the conveying unit includes a first pump body installed on the processing tank and connected to the wastewater chamber, a waste liquid pipe with one end connected to the discharge end of the first pump body and the other end passing through the separation tank and connected to the upper end of the filter sleeve, a second pump body connected to the lower end of the separation tank, a water supply pipe with one end connected to the discharge end of the second pump body and the other end passing through the sealing cover and connected to the mixing tank, and a third pump body connected to the lower end of the supply tank, with one end connected to the discharge end of the third pump body and the other end passing through the sandblasting box for connecting to the sandblasting pipe of the sandblasting head in the sandblasting box.

[0013] Compared with the prior art, the embodiments of this utility model have the following beneficial effects: This automatic liquid-supply wet sandblasting machine works in conjunction with its primary and secondary separation sections. The primary separation section uses an inclined filter conveyor belt to dynamically separate abrasive and wastewater. The secondary separation section uses a filter sleeve for fine filtration, recovering tiny abrasive fragments. After primary and secondary separation, the wastewater can be recycled back into the liquid supply section, reducing wastewater discharge. The abrasive is collected centrally for easy reuse. Furthermore, the secondary separation section has a drain pipe that can flush the filter sleeve, enabling automatic discharge of the separated residue without the need for frequent cleaning by staff, making it highly practical.

[0014] This automatic liquid-supply wet blasting machine features a separate feeding section and mixing tank / supply tank design. This allows the abrasive and liquid to be thoroughly mixed in the mixing tank before being conveyed to the supply tank via a discharge pipe. This effectively prevents unmixed materials from directly entering the blasting system during continuous feeding, thus avoiding negative impacts on the blasting effect. While the feeding section is operating, the mixing section also operates, simultaneously driving the mixing components in both the mixing and supply tanks to rotate and agitate the mixed abrasive. Furthermore, external high-pressure airflow can be ejected through nozzles on some of the mixing components, continuously flushing the bottom of the mixing and supply tanks to prevent abrasive sedimentation and effectively improve the mixing of abrasive and liquid in the mixing tank. This ensures stable liquid supply, maintains consistent blasting quality, and reduces nozzle clogging. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 A perspective view of the present invention is shown; Figure 2 This invention demonstrates a partially disassembled three-dimensional representation. Figure 1 ; Figure 3 This invention demonstrates a partially disassembled three-dimensional representation. Figure 2 ; Figure 4 This invention provides a partially cross-sectional perspective view. Figure 1 ; Figure 5 A partial perspective view of the present invention is shown; Figure 6 This invention provides a partially cross-sectional perspective view. Figure 2 .

[0017] In the picture 1. Sandblasting chamber; 2. Collection hopper; 3. Processing box; 4. Wet material chamber; 5. Wastewater chamber; 6. Primary separation section; 7. Secondary separation section; 8. Control motor; 9. Liquid supply section; 10. Mixing section; 11. Conveying section; 12. Support frame; 13. Liquid supply tank; 14. Mixing tank; 15. Sealing cover; 16. Feed frame; 17. Discharge pipe; 18. Solenoid valve; 19. First rotating pipe; 20. Second rotating pipe; 21. Connecting toothed ring; 22. Toothed groove; 23. 24. Mixing component; 25. Drive motor; 26. Limiting frame; 27. Rotary joint; 28. Gas supply pipe; 29. ​​Stirring pipe; 30. Baffle bar; 31. Air nozzle; 32. Drive wheel; 33. Filter conveyor belt; 34. Barrier block; 35. Collection frame; 36. Separation box; 37. Filter sleeve; 38. Sewage pipe; 39. Valve; 40. First pump body; 41. Waste liquid pipe; 42. Second pump body; 43. Water supply pipe; 44. Third pump body; 45. Sandblasting pipe. Detailed Implementation

[0018] 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.

[0019] like Figure 1-6 As shown, an automatic liquid-supplying wet sandblasting machine includes: a sandblasting box 1, the bottom of the sandblasting box 1 is connected to a material collection hopper 2, the bottom of the material collection hopper 2 is connected to a processing box 3, and the processing box 3 is divided into a wet material chamber 4 and a wastewater chamber by a partition. The initial separation section 6 is installed inside the processing box 3 and is used to input the abrasive and wastewater in the waste material after sandblasting into the wet material chamber 4 and the wastewater chamber, respectively. Secondary separation section 7, which is fixed on the outer wall of the sandblasting box 1, is used to separate crushed abrasives from wastewater; Liquid supply unit 9 is disposed on one side of the sandblasting box 1 and is used to provide raw materials for sandblasting treatment; Mixing unit 10, which is installed in the liquid supply unit 9, is used to agitate the abrasive and liquid in the liquid supply unit 9; The material conveying unit 11 is disposed on the processing box 3, the secondary separation unit 7 and the liquid supply unit 9, and is used to convey the materials processed by the primary separation unit 6, the secondary separation unit 7 and the liquid supply unit 9. During use, the operator manually or automatically inputs a set amount of aqueous solution and abrasive into the mixing tank 14 in the liquid supply section 9. During the operation of the mixing section 10, the drive motor 24 rotates the first rotating tube 19 and the second rotating tube 20. Several stirring tubes 28 and baffle rods 29 create turbulence, rapidly and uniformly mixing the aqueous solution and abrasive in the mixing section 10. With the cooperation of the conveying pipe and the solenoid valve 18, the uniformly mixed abrasive is transported to the liquid supply tank 13. At this time, the mixing section 10 in the liquid supply tank 13 can agitate the mixed abrasive, and external high-pressure airflow can be ejected through the jet nozzles 30 on some of the mixing components 23, continuously flushing the bottom of the mixing tank 14 and the liquid supply tank 13 to prevent abrasive sedimentation and effectively improve the mixing effect of the abrasive and liquid in the mixing tank 14, ensuring liquid supply stability and ensuring stable sandblasting quality. The uniformly mixed abrasive is then transported to the sandblasting chamber 1 for further processing. The sandblasting operation is carried out; the mixed waste material after sandblasting falls into the collection hopper 2 at the bottom of the sandblasting box 1 and enters the processing box 3. Under the operation of the primary separation section 6, the control motor 8 drives the inclined filter conveyor belt 32 to operate. Wastewater enters the sewage chamber 5 through the mesh. The intact abrasive is pushed to the collection frame 34 of the wet material chamber 4 by the blocking block 33 and directly recycled. The wastewater in the sewage chamber 5 is pumped into the separation box 35 by the first pump body 39. The broken abrasive is intercepted by the filter sleeve 36. The clean water enters the liquid supply section 9 through the water supply pipe 42 for recycling, reducing wastewater discharge. The abrasive is collected in a centralized manner, which is convenient for reuse, reduces waste, and reduces costs. In addition, the filter sleeve 36 can be washed through the sewage pipe 37 in the secondary separation section 7, realizing the automatic discharge of the residue after separation. It does not require frequent cleaning by the staff, reduces downtime, and is easy to use. It realizes the high efficiency, environmental protection and automation of the wet sandblasting process.

[0020] Optionally, the liquid supply unit 9 includes a support frame 12 placed on the ground, a liquid supply tank 13 fixed to the upper end of the support frame 12, a mixing tank 14 fixed to the upper end of the liquid supply tank 13, a sealing cover 15 installed on the upper end of the mixing tank 14, a feed frame 16 connected to the sealing cover 15, a discharge pipe 17 connected to the bottom of the mixing tank 14, and a solenoid valve 18 installed on the discharge pipe 17. In use, abrasive and liquid are manually or automatically added to the mixing tank 14 through the feed frame 16, facilitating the adjustment of the abrasive-liquid ratio. The mixing tank 14 is located above the supply tank 13 and is used to temporarily store newly added abrasive and liquid. The mixing section 10 thoroughly mixes the materials. The sealing cover 15 ensures that the mixing tank 14 is sealed to prevent external contamination and liquid evaporation. The supply tank 13 stores the uniformly mixed blasting liquid, ensuring a continuous and stable supply for blasting operations. When the materials in the mixing tank 14 are effectively mixed, the solenoid valve 18 controls the opening and closing of the discharge pipe 17. The mixed materials are precisely fed into the supply tank 13 by gravity. The discharge speed can be adjusted to adapt to different blasting intensity requirements and ensure the stability of the blasting liquid concentration. The separate design of the mixing tank 14 and the supply tank 13 ensures that the abrasive and liquid are fully mixed in the mixing tank 14 before entering the supply tank 13 for later use, preventing unmixed materials from directly entering the blasting system and affecting the blasting effect.

[0021] Optionally, the mixing unit 10 includes a first rotating tube 19 and a second rotating tube 20 respectively rotatably installed in the liquid supply tank 13 and the mixing tank 14, a mating toothed ring 21 fixed to the bottom of the first rotating tube 19, a toothed groove 22 opened on the top of the second rotating tube 20 and meshing with the mating toothed ring 21, two mixing components 23 respectively provided on the first rotating tube 19 and the second rotating tube 20, a drive motor 24 fixed to the top of the sealing cover 15, and a limiting frame 25 fixed to the top of the sealing cover 15 and rotatably connected to the first rotating tube 19; The output end of the drive motor 24 is connected to the first rotating tube 19 via a bevel gear set; In use, the drive motor 24 drives the first rotating tube 19 to rotate through the bevel gear set. The mating toothed ring 21 at the bottom of the first rotating tube 19 meshes with the toothed groove 22 at the top of the second rotating tube 20, causing the second rotating tube 20 to rotate synchronously. This, in turn, causes the mixing component 23 on the first rotating tube 19 and the second rotating tube 20 to rotate synchronously, so as to stir the abrasive and liquid in the mixing tank 14 and the liquid supply tank 13. The limiting frame 25 ensures that the first rotating tube 19 rotates stably and avoids swaying. Since the bevel gear set is used in conjunction with the toothed ring meshing transmission, only a single motor is needed to drive the dual shafts to rotate synchronously, thereby improving the mixing efficiency. It also facilitates the quick separation of the first rotating tube 19 and the second rotating tube 20 when the mixing tank 14 is removed from the liquid supply tank 13, making it convenient for maintenance and cleaning of the mixing tank 14 and the liquid supply tank 13.

[0022] Optionally, the mixing unit 10 also includes a rotary joint 26 installed on the top of the first rotating tube 19 and an air supply pipe 27 fixed on the limiting frame 25 by a clamp. The mixing component 23 includes a plurality of stirring tubes 28 connected in a ring array to the first rotating tube 19 or the second rotating tube 20, a plurality of interference flow rods 29 fixed at equal intervals on the upper end of the plurality of stirring tubes 28, and a plurality of jet nozzles 30 opened at equal intervals at the bottom of the plurality of stirring tubes 28 located at the bottom of the lowest plurality of stirring tubes 28 in the first rotating tube 19 or the second rotating tube 20. One end of the gas pipeline 27 is connected to an external high-pressure gas supply system, and the other end is connected to the rotary joint 26. During use, the mixing unit 23 is driven to rotate, and several stirring tubes 28 are arranged in a ring array. When rotating, they form a vortex, which allows the abrasive and liquid to come into full contact. With the cooperation of the interference flow rod 29, the abrasive agglomerates are further broken up, enhancing the mixing uniformity and effectively preventing abrasive deposition in the liquid supply tank 13. The abrasive and liquid in the mixing section 10 are effectively mixed. The high-pressure gas supplied by the external high-pressure gas supply system can be delivered to the first rotating tube 19 and the second rotating tube 20 through the gas delivery pipe 27 and the rotary joint 26. While the stirring tubes 28 are stirring the material, the gas can be ejected from the jet nozzle 30 of the lowest stirring tube 28 to form a microbubble flow, which further prevents the abrasive from settling. The gas disturbance can also accelerate the liquid flow and reduce the mixing time.

[0023] Optionally, the initial separation section 6 includes two drive wheels 31 rotatably mounted in the processing box 3, a filter conveyor belt 32 sleeved on the outside of the two drive wheels 31 and inclined, a control motor 8 fixed outside the processing box 3, a plurality of blocking blocks 33 fixed at equal intervals on the filter conveyor belt 32, and a collection frame 34 slidably mounted in the wet material chamber 4. The output end of the control motor 8 is fixedly connected to one of the transmission wheels 31; The upward-inclined end of the filter conveyor belt 32 is located inside the wet material chamber 4, and the downward-inclined end of the filter conveyor belt 32 is located directly below the collecting hopper 2; After sandblasting, the mixed waste material enters the processing box 3 from the bottom of the sandblasting box 1 through the collection hopper 2. At the same time, the filter conveyor belt 32 is driven by the control motor 8 to drive two transmission wheels 31, so that the wastewater can flow into the wastewater chamber through the filter holes on the surface of the filter conveyor belt 32. The solid abrasive is intercepted by the blocking block 33 and moves upward with the filter conveyor belt 32 to the collection frame 34 in the wet material chamber 4. It can be taken out and recycled periodically. The filter conveyor belt 32 continuously separates the wastewater and abrasive synchronously, ensuring the processing efficiency of the mixed waste material and facilitating the classification and utilization of the mixed waste material. In addition, when the wastewater passes through the filter conveyor belt 32, it will clean the filter conveyor belt 32 located at the lower end to a certain extent, so that there is no need to stop the machine for cleaning.

[0024] Optionally, the secondary separation section 7 includes a separation box 35 fixed to the outer wall of the sandblasting box 1, a filter sleeve 36 fixed inside the separation box 35, a drain pipe 37 installed at the bottom of the separation box 35 and connected to the lower end of the filter sleeve 36, and a valve 38 installed on the drain pipe 37. After initial separation, the wastewater is pumped from the wastewater chamber into the waste liquid pipe 40 via the first pump body 39 and then into the separation tank 35. The wastewater enters from the upper end of the filter sleeve 36 in the separation tank 35 and flows downward under gravity. The filter sleeve 36 uses a microporous filter screen, which can trap small particles such as broken abrasives and metal shavings remaining in the wastewater. The filtered clean water is stored in the separation tank 35 and can be recycled, significantly reducing the amount of industrial wastewater discharged. It can also prevent small abrasives from entering the sandblasting system, reducing the wear of the sandblasting head and pipeline. After the filter sleeve 36 has been used for a period of time, the valve 38 on the drain pipe 37 can be opened to deliver wastewater to the filter sleeve 36, which can wash away and remove the waste residue in the filter sleeve 36. The valve 38 can be set as an electric valve to automatically clean the waste residue at regular intervals. While ensuring the filtration effect of the filter sleeve 36, it does not require frequent cleaning by personnel, making it highly practical.

[0025] Optionally, the conveying unit 11 includes a first pump body 39 installed on the processing tank 3 and connected to the wastewater chamber, a waste liquid pipe 40 with one end connected to the discharge end of the first pump body 39 and the other end passing through the separation tank 35 and connected to the upper end of the filter sleeve 36, a second pump body 41 connected to the lower end of the separation tank 35, a water conveying pipe 42 with one end connected to the discharge end of the second pump body 41 and the other end passing through the sealing cover 15 and connected to the mixing tank 14, and a third pump body 43 connected to the lower end of the supply tank 13, with one end connected to the discharge end of the third pump body 43 and the other end passing through the sandblasting box 1 for connecting the sandblasting pipe 44 of the sandblasting head in the sandblasting box 1; Wastewater containing crushed abrasive is drawn from the wastewater chamber through the first pump body 39, and pumped into the filter sleeve 36 in the secondary separation section 7 through the waste liquid pipe 40. The filtered clean water enters the next stage, and the remaining crushed abrasive is trapped in the filter sleeve 36. The filtered clean water is drawn from the bottom of the separation tank 35 through the second pump body 41 and transported back to the mixing tank 14 through the water pipe 42 for mixing new abrasive. The abrasive suspension is drawn from the bottom of the supply tank 13 by the third pump body 43 and transported to the blasting head of the blasting box 1 through the blasting pipe 44 to complete the blasting operation; the pump body and pipeline automatically transport abrasive and liquid without the need for frequent feeding or waste discharge.

[0026] 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. An automatic liquid-supplying wet sandblasting machine, characterized in that, include: A sandblasting box (1) is connected to a material collection hopper (2) at the bottom, and a processing box (3) is connected to the bottom of the material collection hopper (2). The processing box (3) is divided into a wet material chamber (4) and a wastewater chamber (5) by a partition. The initial separation section (6) is installed inside the processing box (3) and is used to input the abrasive and wastewater in the waste material after sandblasting into the wet material chamber (4) and the wastewater chamber (5) respectively. The secondary separation section (7) is fixed on the outer wall of the sandblasting box (1) and is used to separate crushed abrasives from wastewater. Liquid supply unit (9) is provided on one side of the sandblasting box (1) and is used to provide raw materials for sandblasting treatment; Mixing section (10), which is installed in the liquid supply section (9) and is used to agitate the abrasive and liquid in the liquid supply section (9); The material conveying unit (11) is installed on the processing box (3), the secondary separation unit (7) and the liquid supply unit (9) to convey the materials processed by the primary separation unit (6), the secondary separation unit (7) and the liquid supply unit (9).

2. The wet sandblasting machine with automatic liquid supply as described in claim 1, characterized in that, The liquid supply unit (9) includes a support frame (12) placed on the ground, a liquid supply tank (13) fixed at the upper end of the support frame (12), a mixing tank (14) fixed at the upper end of the liquid supply tank (13), a sealing cover (15) installed at the upper end of the mixing tank (14), a feed frame (16) connected to the sealing cover (15), a discharge pipe (17) connected to the bottom of the mixing tank (14), and a solenoid valve (18) installed on the discharge pipe (17).

3. The wet sandblasting machine with automatic liquid supply as described in claim 2, characterized in that, The mixing unit (10) includes a first rotating tube (19) and a second rotating tube (20) respectively rotatably installed in the liquid supply tank (13) and the mixing tank (14), a mating toothed ring (21) fixed at the bottom of the first rotating tube (19), a toothed groove (22) opened at the top of the second rotating tube (20) and meshing with the mating toothed ring (21), two mixing components (23) respectively provided on the first rotating tube (19) and the second rotating tube (20), a drive motor (24) fixed at the top of the sealing cover (15), and a limiting frame (25) fixed at the top of the sealing cover (15) and rotatably connected to the first rotating tube (19). The output end of the drive motor (24) is connected to the first rotating tube (19) via a bevel gear set.

4. The wet sandblasting machine with automatic liquid supply as described in claim 3, characterized in that, The mixing section (10) also includes a rotary joint (26) installed on the top of the first rotating tube (19) and an air supply pipe (27) fixed on the limiting frame (25) by a clamp. The mixing component (23) includes a plurality of stirring tubes (28) connected in a ring array to the first rotating tube (19) or the second rotating tube (20), a few interference flow rods (29) fixed at equal intervals at the upper end of the plurality of stirring tubes (28), and a plurality of jet nozzles (30) opened at equal intervals at the bottom of the plurality of stirring tubes (28) at the bottom of the lowest plurality of stirring tubes (28) of the first rotating tube (19) or the second rotating tube (20). One end of the gas pipeline (27) is connected to an external high-pressure gas supply system, and the other end is connected to the rotary joint (26).

5. The wet sandblasting machine with automatic liquid supply as described in claim 2, characterized in that, The initial separation section (6) includes two drive wheels (31) rotatably installed in the processing box (3), a filter conveyor belt (32) sleeved on the outside of the two drive wheels (31) and inclined, a control motor (8) fixed outside the processing box (3), a number of blocking blocks (33) fixed at equal intervals on the filter conveyor belt (32), and a collection frame (34) slidably installed in the wet material chamber (4). The output end of the control motor (8) is fixedly connected to one of the transmission wheels (31); The upward-sloping end of the filter conveyor belt (32) is located inside the wet material chamber (4), and the downward-sloping end of the filter conveyor belt (32) is located directly below the collection hopper (2).

6. The wet sandblasting machine with automatic liquid supply as described in claim 5, characterized in that, The secondary separation section (7) includes a separation box (35) fixed on the outer wall of the sandblasting box (1), a filter sleeve (36) fixed inside the separation box (35), a drain pipe (37) installed at the bottom of the separation box (35) and connected to the lower end of the filter sleeve (36), and a valve (38) installed on the drain pipe (37).

7. The wet sandblasting machine with automatic liquid supply as described in claim 6, characterized in that, The material conveying unit (11) includes a first pump body (39) installed on the processing box (3) and connected to the wastewater chamber (5), a waste liquid pipe (40) with one end connected to the discharge end of the first pump body (39) and the other end passing through the separation box (35) and connected to the upper end of the filter sleeve (36), a second pump body (41) connected to the lower end of the separation box (35), a water conveying pipe (42) with one end connected to the discharge end of the second pump body (41) and the other end passing through the sealing cover (15) and connected to the mixing tank (14), and a third pump body (43) connected to the lower end of the supply tank (13), with one end connected to the discharge end of the third pump body (43) and the other end passing through the sandblasting box (1) for connecting the sandblasting pipe (44) of the sandblasting head in the sandblasting box (1).

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