A wall surface polishing device

Abstract

This utility model relates to the field of building engineering equipment technology, specifically a wall surface grinding device. It includes a housing assembly, a grinding assembly, a support assembly, and a spraying assembly. The housing assembly includes an outer housing; the grinding assembly includes a motor and a dust extraction pipe; the support assembly includes a support frame, a hydraulic cylinder, and an air pump; and the spraying assembly includes a water tank, an exhaust fan, a grille, and a filter plate. A grinding disc is detachably connected to the end of the rotating rod away from the motor via four sets of M8 hexagonal socket bolts. A dust collection hood is fixedly fitted onto the outer ring of the motor by three sets of circumferentially evenly distributed elastic clips. Dust generated during grinding is drawn into the dust collection hood through the air collection pipe and the dust extraction pipe. The sealing lip of the sleeve pipe is in close contact with the wall surface to prevent dust leakage. A protective gasket further fills the gap between the dust collection hood and the wall surface, improving sealing and ensuring effective gas extraction. The grinding area can be observed in real time through a transparent cover.

Description

Technical Field

[0001] This utility model relates to the field of building engineering equipment technology, specifically a wall surface grinding device. Background Technology

[0002] Wall surface sanding is a crucial step in building decoration and wall renovation. Its purpose is to remove wall protrusions, impurities, and old coatings to achieve a level surface, providing a smooth base for subsequent painting, wallpapering, and other processes. To improve sanding efficiency and reduce dust pollution, existing technologies have developed wall surface sanding devices that integrate sanding and dust collection functions. These devices are typically equipped with dust collection hoods and dust extraction systems, using negative pressure to adsorb dust generated during sanding and reduce the concentration of dust in the environment.

[0003] However, the dust collection hoods of existing grinding devices still have certain defects in actual use: when the dust collection hood is attached to the wall, gaps are easily formed between the two due to factors such as differences in wall flatness and device installation errors. This causes dust to overflow from the gaps during the negative pressure adsorption process, which not only reduces the dust collection efficiency but also causes secondary environmental pollution and affects the health of operators.

[0004] On the other hand, during the sanding process, the dust hood usually obscures the sanding area, preventing operators from observing the sanding status of the wall in real time, such as the fit between the sanding disc and the wall, the flatness of the wall, and whether there are any issues such as missed areas or over-sanding. Operators can only rely on experience or stop the machine to check and adjust operating parameters, which not only affects sanding efficiency but also easily leads to uneven sanding quality, making it difficult to meet the demands of high-precision decoration. Utility Model Content

[0005] To address the above problems, the purpose of this utility model is to provide a wall surface grinding device that solves the problem that when the dust collection hood is attached to the wall, gaps easily form between the two due to differences in wall flatness and device installation errors. This causes dust to overflow from the gaps during negative pressure adsorption, making it impossible to observe the grinding status of the wall surface in real time. The device uses an air collection pipe and a dust extraction pipe to suck in the dust generated during grinding inside the dust collection hood. The sealing lip of the sleeve pipe is in close contact with the wall surface to prevent dust from overflowing. The protective gasket further fills the gap between the dust collection hood and the wall surface, improving the sealing performance and ensuring the gas extraction effect. The state of the grinding area can be observed in real time through the transparent cover, facilitating timely adjustment of operating parameters.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a wall surface grinding device, comprising a housing assembly, a grinding assembly, a support assembly, and a spraying assembly. The housing assembly includes an outer housing. The grinding assembly includes a motor and a dust extraction pipe. The support assembly includes a support frame, a hydraulic cylinder, and an air pump. The spraying assembly includes a water tank, an exhaust fan, a grille, and a filter plate. A water pump is fixedly installed on the inner side of the outer housing using M10 stainless steel bolts. The output end of the water pump is sealed via a clamp-type flange with a nitrile rubber gasket. The motor is connected to a water supply pipe. The output end of the motor is coaxially fixed to a rotating rod via a flexible coupling. The end of the rotating rod away from the motor is detachably connected to a grinding disc via four sets of M8 hexagon socket bolts. The outer ring of the motor is fixedly fitted with a dust collection cover by three sets of circumferentially evenly distributed elastic buckles. The upper and lower ends of the support frame are symmetrically connected to positioning plates via argon arc welding. The output end of the air pump is sealed to an air supply pipe via a flange with a fluororubber O-ring. The inner side of the water storage tank is fixed with a ring-shaped hollow water supply layer via laser welding.

[0007] The beneficial effects of this utility model are as follows: the dust generated during grinding is sucked into the dust collection hood through the air collection pipe and the dust extraction pipe, the sealing lip of the sleeve pipe is in close contact with the wall to prevent dust from overflowing, the protective pad further fills the gap between the dust collection hood and the wall to improve the sealing performance and ensure the gas extraction effect, and the state of the grinding area can be observed in real time through the transparent cover, which is convenient for timely adjustment of the operation parameters.

[0008] To adjust the contact pressure between the sanding disc and the wall surface via the electric actuator of the support assembly, ensuring the sanding disc adheres evenly to the wall surface: As a further improvement to the above technical solution: the top of the outer casing is connected to a water inlet via a G1.5 thread seal, and a food-grade silicone sealing cap is provided on the water inlet; the front wall of the outer casing is rotatably connected to a door via a hinge with a damping plate; the inner wall of the door is fixed with a transparent explosion-proof glass observation window by an EPDM sealing strip; the motor is electrically connected to the operation panel on the outside of the outer casing via a copper core shielded wire; and the end of the water supply pipe away from the water pump passes through the water storage tank wall and is sealed and connected to the water supply layer via a compression fitting.

[0009] The beneficial effects of this improvement are as follows: the device is moved to the wall to be sanded by the universal wheels with brake pads at the bottom of the outer casing, the brake pads are pressed to lock the device position, the motor is started through the control panel, the motor drives the sanding disc to rotate synchronously through the rotating rod, and at the same time the electric push rod of the support component is used to adjust the contact pressure between the sanding disc and the wall, so that the sanding disc is evenly attached to the wall, thus realizing the wall sanding operation.

[0010] To ensure the gas undergoes primary filtration via a filter screen as it flows upwards: As a further improvement to the above technical solution: the two ends of the filter plate are symmetrically connected with sliding strips by countersunk bolts, the sliding strips have a T-shaped cross section, and the inner wall of the filter plate is connected with a 100-mesh 304 stainless steel woven mesh filter screen by edge riveting.

[0011] The beneficial effects of this improvement are as follows: After the dust-laden gas enters the water storage tank through the gas delivery pipe, the gas flows upward and undergoes primary filtration through the filter screen. At the same time, the water sprayed from the spray pipe washes the dust adhering to the filter screen. The washing frequency is synchronized with the operation of the air pump. The one-way valve connected in series at the inlet of the gas delivery pipe is used to prevent water in the water storage tank from flowing back into the gas delivery pipe and air pump, thus protecting the safety of the equipment.

[0012] To ensure that the corrugated expansion joint in the middle section of the gas collection pipe expands and contracts synchronously with the height of the support frame, and to adapt to the required pipe length: As a further improvement to the above technical solution: one end of the outer casing is fully welded to a 10mm thick base plate. The top of the base plate corresponds to the mounting positions of the air pump and hydraulic cylinder, and mounting seats with M12 threaded holes are welded and fixed to both. The bottom of the air pump is fitted to the mounting seat via a 5mm thick nitrile rubber shock-absorbing pad, and is threaded to the mounting seat via stainless steel bolts penetrating the air pump base. The fixed end of the hydraulic cylinder is sealed and fixed to another mounting seat via a flange with a fluororubber O-ring. The telescopic end of the hydraulic cylinder is welded to an ear plate with a φ12 pin hole and connected to the support frame via a pin shaft. Both the air pump and the hydraulic cylinder are electrically connected to the control panel via shielded wires. The input end of the air pump is sealed to one end of the air collection pipe via a flange with a dust-resistant rubber gasket. The telescopic pipe connected in series in the middle section of the air collection pipe is a 304 stainless steel corrugated telescopic pipe. The two ends of the telescopic pipe are sealed and snapped to the two sections of the air collection pipe via quick connectors. The end of the air collection pipe away from the air pump is sealed to the ends of the two dust extraction pipes via a T-shaped tee connector with a dust-resistant rubber gasket. The output end of the air pump is sealed to an air delivery pipe via a flange. The end of the air delivery pipe away from the air pump passes through the wall of the water storage tank and extends to its inner side.

[0013] The beneficial effects of this improvement are as follows: The hydraulic cylinder extension and retraction end is controlled by the operation panel to move the support frame up and down until the grinding disc is aligned with the target area of ​​the wall to be ground. When the grinding disc reaches the preset height, the hydraulic cylinder automatically locks the stroke through the built-in locking valve. During this process, the corrugated telescopic pipe in the middle section of the air collection pipe extends and retracts synchronously with the height change of the support frame to adapt to the pipe length requirements. The air pump is started by the operation panel, and the suction is adjusted according to the amount of dust generated by the wall grinding. After the air pump runs, it generates negative pressure, which draws the dust-laden gas wrapped in the dust collection hood into the two dust collection pipes in sequence. The dust-laden gas flows into the air collection pipe through the three-way connector, and after being pressurized by the air pump, it is transported to the water storage tank through the air delivery pipe.

[0014] The bar screen is used to prevent the spray water in the water storage tank from being sucked into the exhaust fan, and also to intercept large particles of impurities: As a further improvement to the above technical solution: the exhaust fan is fixed to the mounting base with M6 galvanized bolts, and the mounting base is fixed to the top of the outer casing by welding. The exhaust fan is electrically connected to the operation panel through a wire. The exhaust pipe at one end of the exhaust fan passes through a pre-set through hole at the top of the water storage tank and extends to the upper middle part of the inner side of the water storage tank. The connection between the exhaust pipe and the water storage tank wall is sealed with a nitrile rubber sealing sleeve. The mesh size is 5mm, and it can be detachably fitted onto the outer ring of the section of the exhaust pipe located inside the water storage tank by three circumferentially evenly distributed elastic buckles.

[0015] The beneficial effects of this improvement are as follows: when the exhaust fan is started, it draws out the clean gas that has been filtered by water from the water storage tank and discharges it to the outside through the exhaust pipe. The grid screen is used to prevent the spray water in the water storage tank from being sucked into the exhaust fan, and at the same time intercepts large-particle impurities to avoid short circuits or damage to the equipment.

[0016] In order for the dust-laden gas to come into contact with the spray water after entering the water storage tank, the dust will be encapsulated by the water to form dust-laden wastewater: As a further improvement to the above technical solution: the lower end of the outer casing is sealed with a drain pipe with a ball valve through a flange with a rubber sealing gasket; the lower end of the water delivery layer is connected with spray pipes at equal intervals of 10cm along the circumference; the water pump is electrically connected to the operation panel through a wire; the end of the water delivery pipe away from the water pump passes through the wall of the water storage tank and is sealed and connected to the water delivery layer through a compression fitting.

[0017] The beneficial effects of this improvement are as follows: When the water pump is started, the water stored in the outer tank is pressurized by the water pump and transported to the water delivery layer through the water delivery pipe. Then, it is sprayed into the water storage tank through the spray pipe at a predetermined flow rate. After the dust-laden gas enters the water storage tank, it comes into contact with the sprayed water. The dust is wrapped by the water to form dust-laden sewage. The dust-laden sewage collects at the bottom of the water storage tank. When the liquid level in the water storage tank reaches 2 / 3 of the total volume, the valve of the drain pipe is opened to discharge the dust-laden sewage to the external sewage collection device.

[0018] To facilitate the pull-out installation of the filter plates via slide rails, making filter maintenance and replacement easier: As a further improvement to the above technical solution: the inner wall of the water storage tank is symmetrically fixed with slide rails by welding, and a T-shaped slide groove is opened on the inner side of the slide rail. The inner wall of the slide rail is fixed with a limit pad by a slot, and the slide rail and the sliding strip of the filter plate are slidably connected through the T-shaped slide groove.

[0019] The beneficial effects of this improvement are: the filter plate can be installed by pulling it out through the slide rail, which facilitates the maintenance and replacement of the filter screen; the position of the sliding strip is limited by the limiting pad to prevent the filter plate from sliding out of the slide rail or hitting the water storage tank wall.

[0020] To further fill the gap between the dust collection hood and the wall and improve the seal: As a further improvement to the above technical solution: Both sides of the dust collection hood are provided with φ50mm suction ports. The suction ports of the dust collection hood are sealed and connected to suction pipes via pagoda-shaped quick-connect couplings. The quick-connect couplings have annular sealing grooves on their outer rings. Two suction pipes are provided, each connected in series with a corrugated, retractable metal telescopic pipe. One end of each suction pipe is sealed and connected to the suction ports on both sides of the dust collection hood via quick-connect couplings, and the other end is sealed and connected to the air collection pipe via a tee connector. The end of the support frame near the dust collection hood is hinged to the fixed end of the electric actuator via a pin. The telescopic end of the electric actuator is fixedly connected to the connecting lug on the outside of the dust collection hood via M10 bolts. The electric actuator is electrically connected to the control panel via wires. The end of the dust collection hood away from the motor is glued to a rubber sleeve. A transparent cover is connected to the middle of the dust collection hood via buckles. A snap-fit ​​groove is provided on the inner side of the wall of the end of the dust collection hood away from the motor, and a protective pad is embedded inside the snap-fit ​​groove.

[0021] The beneficial effects of this improvement are as follows: The extension stroke of the electric actuator is input via the digital keys on the control panel, the extension speed is set, and the electric actuator is started. Its extension end pushes the dust collection hood closer to the wall until the sleeve is in contact with the wall. After the air pump is started, the air pump generates negative pressure, which sucks in the dust generated during grinding through the air collection pipe and the dust extraction pipe. The sealing lip of the sleeve is in close contact with the wall to prevent dust from overflowing. The protective gasket further fills the gap between the dust collection hood and the wall, improving the sealing performance and ensuring the gas extraction effect. The status of the grinding area can be observed in real time through the transparent cover, which facilitates timely adjustment of operating parameters.

[0022] In summary, the beneficial effects of this design are as follows: After the air pump is started, it generates negative pressure, which draws in the dust generated during grinding through the air collection pipe and dust extraction pipe. The sealing lip of the sleeve pipe is in close contact with the wall surface to prevent dust from overflowing. The protective gasket further fills the gap between the dust collection hood and the wall surface, improving the sealing performance and ensuring the gas extraction effect. The status of the grinding area can be observed in real time through the transparent cover, making it easy to adjust the operating parameters in a timely manner. The filter plate can be installed by pulling it out through the slide rail, which facilitates the maintenance and replacement of the filter screen.

[0023] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0024] Figure 1 This is a cross-sectional view of the dust collection hood of this utility model.

[0025] Figure 2 This is a front view structural diagram of the present invention.

[0026] Figure 3 This is a cross-sectional structural diagram of the outer casing of this utility model.

[0027] Figure 4 for Figure 3 A magnified structural diagram of point A in the middle.

[0028] Figure 5 This is a schematic diagram of the structure of the support component of this utility model.

[0029] Figure 6 This is a schematic diagram of the structure of the filter plate of this utility model.

[0030] In the diagram: 1. Box assembly; 11. Outer box; 12. Drain pipe; 13. Water pump; 14. Water supply pipe; 15. Water inlet; 16. Box door; 161. Observation window; 17. Base plate; 2. Grinding assembly; 21. Motor; 22. Dust collection hood; 221. Socket pipe; 222. Transparent cover; 223. Snap-fit ​​groove; 224. Protective pad; 23. Grinding disc; 24. Rotating rod; 25. Dust extraction pipe; 26. Telescopic... 27. Air collection pipe; 28. Electric actuator; 3. Support assembly; 31. Support frame; 32. Positioning plate; 33. Hydraulic cylinder; 34. Air pump; 35. Air supply pipe; 4. Spray assembly; 41. Water storage tank; 42. Exhaust fan; 43. Exhaust pipe; 44. Grille; 45. Water supply layer; 46. Spray pipe; 47. Filter plate; 471. Sliding strip; 472. Filter screen; 473. Slide rail; 474. Limiting pad. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of this utility model in any way.

[0032] like Figure 1-6As shown, a wall surface grinding device includes a housing assembly 1, a grinding assembly 2, a support assembly 3, and a spraying assembly 4. The housing assembly 1 includes an outer housing 11. The grinding assembly 2 includes a motor 21 and a dust extraction pipe 25. The support assembly 3 includes a support frame 31, a hydraulic cylinder 33, and an air pump 34. The spraying assembly 4 includes a water storage tank 41, an exhaust fan 42, a grille 44, and a filter plate 47. A water pump 13 is fixedly installed on the inner side of the outer housing 11 using M10 stainless steel bolts. The output end of the water pump 13 is sealed to a water supply pipe 1 via a clamp-on flange with a nitrile rubber sealing gasket. 4. The output end of the motor 21 is coaxially fixedly connected to a rotating rod 24 via an elastic coupling. The end of the rotating rod 24 away from the motor 21 is detachably connected to a grinding disc 23 via four sets of M8 hexagonal socket bolts. The outer ring of the motor 21 is fixedly fitted with a dust collection cover 22 by three sets of circumferentially evenly distributed elastic buckles. The upper and lower ends of the support frame 31 are symmetrically connected to positioning plates 32 by argon arc welding. The output end of the air pump 34 is sealed to an air supply pipe 35 via a flange with a fluororubber O-ring. The inner side of the water storage tank 41 is fixed with an annular hollow water supply layer 45 by laser welding.

[0033] The top of the outer casing 11 is sealed with a water inlet 15 via a G1.5 thread. A food-grade silicone sealing cap is fitted onto the water inlet 15. The front wall of the outer casing 11 is rotatably connected to a door 16 via a hinge with damping plates. A transparent explosion-proof glass observation window 161 is fixed to the inner wall of the door 16 via a EPDM sealing strip. The motor 21 is electrically connected to an operation panel located on the outside of the outer casing 11 via a copper-core shielded wire. The water supply pipe 14 is located away from the water pump 1. One end of 3 penetrates the wall of the water storage tank 41 and is sealed and connected to the water delivery layer 45 through a compression fitting. The device is moved to the wall to be sanded by the universal wheels with brake pads at the bottom of the outer casing 11. The brake pads are pressed to lock the device position. The motor 21 is started through the control panel. The motor 21 drives the sanding disc 23 to rotate synchronously through the rotating rod 24. At the same time, the electric push rod 28 of the support component 3 adjusts the contact pressure between the sanding disc 23 and the wall, so that the sanding disc 23 is evenly attached to the wall, thus realizing the wall sanding operation.

[0034] The filter plate 47 has sliding strips 471 symmetrically connected to both ends by countersunk bolts. The sliding strips 471 have a T-shaped cross-section. The inner wall of the filter plate 47 is connected to a 100-mesh 304 stainless steel woven mesh filter screen 472 by edge riveting. The dust-laden gas enters the water storage tank 41 after passing through the gas delivery pipe 35. When the gas flows upward, it undergoes primary filtration through the filter screen 472. At the same time, the water sprayed from the spray pipe 46 washes the dust adhering to the filter screen 472. The washing frequency is synchronized with the operation of the air pump 34. A one-way valve connected in series at the inlet of the gas delivery pipe 35 is used to prevent water in the water storage tank 41 from flowing back into the gas delivery pipe 35 and the air pump 34, thus protecting the equipment.

[0035] One end of the outer casing 11 is fully welded to a 10mm thick base plate 17. The top of the base plate 17 corresponds to the mounting positions of the air pump 34 and the hydraulic cylinder 33, and both are welded and fixed with mounting seats having M12 threaded holes. The bottom of the air pump 34 is fitted to the mounting seat through a 5mm thick nitrile rubber shock-absorbing pad, and is threaded to the mounting seat by stainless steel bolts penetrating the base of the air pump 34. The fixed end of the hydraulic cylinder 33 is sealed and fixed to another mounting seat through a flange with a fluororubber O-ring. The telescopic end is welded with an ear plate with a φ12 pin hole and connected to the support frame 31 by a pin shaft. The air pump 34 and the hydraulic cylinder 33 are both electrically connected to the operation panel through shielded wires. The input end of the air pump 34 is sealed to one end of the air collecting pipe 27 through a flange with a dust-resistant rubber gasket. The telescopic pipe 26 connected in series in the middle section of the air collecting pipe 27 is a 304 stainless steel corrugated telescopic pipe. The two ends of the telescopic pipe 26 are respectively sealed and snapped to the two sections of the air collecting pipe 27 through quick couplings. The air collecting pipe 27 is away from the air pump 34. One end of the 4 is sealed to the ends of the two dust extraction pipes 25 via a T-shaped tee joint with a dust-resistant rubber sealing gasket. The output end of the air pump 34 is sealed to an air supply pipe 35 via a flange. The end of the air supply pipe 35 away from the air pump 34 passes through the wall of the water storage tank 41 and extends to its inner side. The hydraulic cylinder 33 is extended or retracted by controlling the extension end of the hydraulic cylinder 33 through the operation panel, which drives the support frame 31 to move up and down until the grinding disc 23 is aligned with the target area of ​​the wall to be ground. When the grinding disc 23 reaches the preset height, the hydraulic cylinder 33 moves through the inner... The locking valve automatically locks the stroke. During this process, the corrugated telescopic pipe 26 in the middle section of the air collection pipe 27 extends and retracts synchronously with the height change of the support frame 31 to adapt to the pipe length requirements. The air pump 34 is started through the operation panel, and the suction is adjusted according to the amount of dust generated by wall grinding. After the air pump 34 runs, it generates negative pressure, which draws the dust-laden gas wrapped in the dust collection hood 22 into the two dust extraction pipes 25 in sequence. The dust-laden gas flows through the three-way connector to the air collection pipe 27, and after being pressurized by the air pump 34, it is transported to the water storage tank 41 through the air delivery pipe 35.

[0036] The exhaust fan 42 is fixed to the mounting base with M6 galvanized bolts. The mounting base is fixed to the top of the outer casing 11 by welding. The exhaust fan 42 is electrically connected to the operation panel via a wire. The exhaust pipe 43 at one end of the exhaust fan 42 passes through a pre-set through hole at the top of the water storage tank 41 and extends to the upper middle part of the inner side of the water storage tank 41. The connection between the exhaust pipe 43 and the wall of the water storage tank 41 is sealed with a nitrile rubber sealing sleeve. The mesh screen 44 has a 5mm aperture and is detachably fitted onto the outer ring of the section of the exhaust pipe 43 located inside the water storage tank 41 by three circumferentially evenly distributed elastic buckles. When the exhaust fan 42 is started, it extracts the clean gas filtered by water from the water storage tank 41 through the exhaust pipe 43 and discharges it to the outside. The mesh screen 44 is used to prevent the spray water in the water storage tank 41 from being sucked into the exhaust fan 42, and at the same time intercepts large-particle impurities to avoid short circuits or damage to the equipment.

[0037] The lower end of the outer casing 11 is sealed with a flange with a rubber gasket and a drain pipe 12 with a ball valve. The lower end of the water delivery layer 45 is connected with spray pipes 46 at equal intervals of 10cm along the circumference. The water pump 13 is electrically connected to the operation panel via a wire. The end of the water delivery pipe 14 away from the water pump 13 passes through the wall of the water storage tank 41 and is sealed and connected to the water delivery layer 45 via a compression fitting. When the water pump 13 is started, the water stored in the outer casing 11 is pressurized by the water pump 13 and transported to the water delivery layer 45 through the water delivery pipe 14. Then, it is sprayed into the water storage tank 41 through the spray pipes 46 at a predetermined flow rate. After the dust-laden gas enters the water storage tank 41, it comes into contact with the sprayed water. The dust is enveloped by the water to form dust-laden wastewater. The dust-laden wastewater collects at the bottom of the water storage tank 41. When the liquid level in the water storage tank 41 reaches 2 / 3 of the total volume, the valve of the drain pipe 12 is opened to discharge the dust-laden wastewater to an external wastewater collection device.

[0038] The inner wall of the water storage tank 41 is symmetrically fixed with slide rails 473 by welding. T-shaped grooves are opened on the inner side of the slide rails 473. The inner wall of the slide rails 473 is fixed with a limiting pad 474 by a slot. The slide rails 473 and the sliding strips 471 of the filter plate 47 are slidably connected through the T-shaped grooves. The slide rails 473 enable the pull-out installation of the filter plate 47, which is convenient for the maintenance and replacement of the filter screen 472. The limiting pads 474 limit the position of the sliding strips 471 to prevent the filter plate 47 from sliding out of the slide rail or hitting the wall of the water storage tank.

[0039] Both sides of the dust collection hood 22 have φ50mm suction ports. The suction ports of the dust collection hood 22 are sealed to suction pipes 25 via pagoda-shaped quick-connect couplings. The quick-connect couplings have annular sealing grooves on their outer rings. Two suction pipes 25 are provided, each connected in series with a corrugated, retractable metal telescopic pipe 26. One end of each suction pipe 25 is sealed to the suction ports on both sides of the dust collection hood 22 via quick-connect couplings, and the other end is sealed to the air collection pipe 27 via a T-joint. The end of the support frame 31 near the dust collection hood 22 is hinged to the fixed end of the electric actuator 28 via a pin. The telescopic end of the electric actuator 28 is fixed to the connecting lug on the outside of the dust collection hood 22 via M10 bolts. The electric actuator 28 is electrically connected to the control panel via wires. The end of the dust collection hood 22 away from the motor 21 is glued to a rubber sleeve pipe 22. 1. A transparent cover 222 is connected to the middle of the dust collection hood 22 by a snap fastener. A snap-fit ​​groove 223 is opened on the inner side of the wall of the dust collection hood 22 away from the motor 21. A protective pad 224 is embedded in the inner side of the snap-fit ​​groove 223. The extension stroke of the electric push rod 28 is input through the digital keys on the operation panel, the extension speed is set, and the electric push rod 28 is started. Its extension end pushes the dust collection hood 22 closer to the wall until the sleeve pipe 221 is in contact with the wall. After the air pump 34 is started, the air pump 34 generates negative pressure and sucks in the dust generated by grinding in the dust collection hood 22 through the air collection pipe 27 and the dust extraction pipe 25. The sealing lip of the sleeve pipe 221 is in close contact with the wall to prevent dust from overflowing. The protective pad 224 further fills the gap between the dust collection hood and the wall to improve the sealing and ensure the gas extraction effect. The state of the grinding area can be observed in real time through the transparent cover 222, which is convenient for timely adjustment of the operation parameters.

[0040] The working principle of this utility model is as follows: During use, the device is moved to the wall to be sanded using the universal wheels with brake pads at the bottom of the outer casing 11. The brake pads are pressed to lock the device position. The hydraulic cylinder 33 is extended or retracted via the control panel, driving the support frame 31 to move up and down until the sanding disc 23 is aligned with the target area of ​​the wall. When the sanding disc 23 reaches the preset height, the hydraulic cylinder 33 automatically locks its stroke via a built-in locking valve. During this process, the corrugated telescopic pipe 26 in the middle section of the air collection pipe 27 extends and retracts synchronously with the height change of the support frame 31, adapting to the required pipe length. The extension stroke of the electric actuator 28 is input via the digital keys on the control panel, the extension speed is set, and the electric actuator 28 is activated. Its extension end pushes the dust collection hood 22 closer to the wall. Once the sleeve 221 is flush with the wall, the motor 21 is started via the control panel. The motor 21 drives the grinding disc 23 to rotate synchronously via the rotating rod 24. Simultaneously, the contact pressure between the grinding disc 23 and the wall is adjusted via the electric push rod 28 of the support component 3, ensuring that the grinding disc 23 is evenly flush with the wall for wall sanding. After starting the air pump 34, the air pump 34 generates negative pressure, which draws the dust generated during sanding into the dust collection hood 22 through the air collection pipe 27 and the dust extraction pipe 25. The sealing lip of the sleeve 221 is in close contact with the wall to prevent dust from spilling out. The protective gasket 224 further fills the gap between the dust collection hood and the wall, improving the seal and ensuring effective gas extraction. The status of the sanding area can be observed in real time through the transparent cover 222, facilitating timely adjustment of operating parameters and dust-laden gas. The gas flows through a three-way connector to the gas collection pipe 27, and is then pressurized by the air extraction pump 34 before being transported to the water storage tank 41 through the gas delivery pipe 35. The exhaust fan 42 and water pump 13 are started, and the clean gas filtered by water is extracted from the water storage tank 41 through the exhaust pipe 43 and discharged to the outside. The grille 44 prevents the spray water in the water storage tank 41 from being sucked into the exhaust fan 42, and also intercepts large particles to prevent short circuits or damage to the equipment. Dust-laden gas enters the water storage tank 41 through the gas delivery pipe 35. As the gas flows upward, it undergoes primary filtration through the filter screen 472. Simultaneously, the water sprayed from the spray pipe 46 washes the dust adhering to the filter screen 472. The washing frequency is synchronized with the operation of the air extraction pump 34. A one-way valve connected in series at the inlet of the gas delivery pipe 35 is used to prevent… Water in the storage tank 41 flows back into the gas supply pipe 35 and the air pump 34 to protect the equipment. Water stored in the outer casing 11 is pressurized by the water pump 13 and transported to the water supply layer 45 through the water supply pipe 14. Then, it is sprayed into the storage tank 41 through the spray pipe 46 at a predetermined flow rate. After the dust-laden gas enters the storage tank 41, it comes into contact with the sprayed water. The dust is enveloped by the water to form dust-laden wastewater, which collects at the bottom of the storage tank 41. When the liquid level in the storage tank 41 reaches 2 / 3 of the total volume, the valve of the drain pipe 12 is opened to discharge the dust-laden wastewater to an external wastewater collection device. The filter plate 47 is installed by a pull-out mechanism via the slide rail 473, which facilitates the maintenance and replacement of the filter screen 472. The position of the sliding strip 471 is limited by the limiting pad 474.To prevent the filter plate 47 from sliding off the slide rail or impacting the water tank wall,

[0041] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Specific examples have been used in this document to illustrate the principles and implementation methods of this utility model. These examples are merely for the purpose of helping to understand the method and core ideas of this utility model. The above descriptions are only preferred embodiments of this utility model. It should be pointed out that, due to the limitations of written expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or variations can be made without departing from the principles of this utility model, and the above technical features can be combined in an appropriate manner. These improvements, modifications, variations, or combinations, or the direct application of the concept and technical solution of this utility model to other situations without modification, should all be considered within the scope of protection of this utility model.

Claims

1. A wall surface grinding device, comprising a housing assembly (1), a grinding assembly (2), a support assembly (3), and a spraying assembly (4), wherein the housing assembly (1) comprises an outer housing (11), the grinding assembly (2) comprises a motor (21) and a dust extraction pipe (25), the support assembly (3) comprises a support frame (31), a hydraulic cylinder (33), and an air pump (34), and the spraying assembly (4) comprises a water storage tank (41), an exhaust fan (42), a grid mesh (44), and a filter plate (47), characterized in that: The inner side of the outer casing (11) is fixedly installed with a water pump (13) by M10 stainless steel bolts. The output end of the water pump (13) is sealed and connected to a water pipe (14) by a clamp flange with a nitrile rubber sealing gasket. The output end of the motor (21) is coaxially fixedly connected to a rotating rod (24) by an elastic coupling. The end of the rotating rod (24) away from the motor (21) is detachably connected to a grinding disc (23) by four sets of M8 hexagonal socket bolts. The outer ring of the motor (21) is fixedly fitted with a dust collection cover (22) by three sets of elastic buckles evenly distributed around the circumference. The upper and lower ends of the support frame (31) are symmetrically connected with positioning plates (32) by argon arc welding. The output end of the air pump (34) is sealed and connected to an air pipe (35) by a flange with a fluororubber O-ring. The inner side of the water storage tank (41) is fixed with a ring-shaped hollow water delivery layer (45) by laser welding.

2. The wall surface grinding device according to claim 1, characterized in that: The top of the outer casing (11) is sealed with a water inlet (15) via a G1.5 thread. A food-grade silicone sealing cap is provided on the water inlet (15). The front wall of the outer casing (11) is rotatably connected to a door (16) via a hinge with damping plates. The inner wall of the door (16) is fixed with a transparent explosion-proof glass observation window (161) by EPDM sealing strip. The motor (21) is electrically connected to the operation panel provided on the outside of the outer casing (11) via a copper core shielded wire. The end of the water pipe (14) away from the water pump (13) passes through the wall of the water storage tank (41) and is sealed and connected to the water delivery layer (45) via a compression fitting.

3. The wall surface grinding device according to claim 1, characterized in that: The filter plate (47) has sliding strips (471) symmetrically connected at both ends by countersunk bolts. The sliding strips (471) have a T-shaped cross section. The inner wall of the filter plate (47) is connected to a filter screen (472) of 100 mesh 304 stainless steel woven mesh by edge riveting.

4. The wall surface grinding device according to claim 1, characterized in that: One end of the outer casing (11) is fully welded to a 10mm thick base plate (17). The top of the base plate (17) corresponds to the installation positions of the air pump (34) and the hydraulic cylinder (33), and is welded to a mounting seat with an M12 threaded hole. The bottom of the air pump (34) is fitted to the mounting seat through a 5mm thick nitrile rubber shock-absorbing pad, and is threaded to the mounting seat through a stainless steel bolt penetrating the base of the air pump (34). The fixed end of the hydraulic cylinder (33) is sealed and fixed to another mounting seat through a flange with a fluororubber O-ring. The end of the telescopic end of the hydraulic cylinder (33) is welded to an ear plate with a φ12 pin hole and is connected to the support frame (31) through a pin shaft. The air pump (34) and the hydraulic cylinder (33) are both shielded by a guide. The line is electrically connected to the operation panel. The input end of the air pump (34) is sealed to one end of the air collection pipe (27) through a flange with a dust-resistant rubber gasket. The telescopic pipe (26) connected in series in the middle section of the air collection pipe (27) is a 304 stainless steel corrugated telescopic pipe. The two ends of the telescopic pipe (26) are respectively sealed and snapped to the two sections of the air collection pipe (27) through quick connectors. The end of the air collection pipe (27) away from the air pump (34) is sealed to the ends of the two dust extraction pipes (25) through a T-type tee joint with a dust-resistant rubber gasket. The output end of the air pump (34) is sealed to the air delivery pipe (35) through a flange. The end of the air delivery pipe (35) away from the air pump (34) passes through the wall of the water storage tank (41) and extends to its inner side.

5. A wall surface grinding device according to claim 1, characterized in that: The exhaust fan (42) is fixed to the mounting base by M6 galvanized bolts. The mounting base is fixed to the top of the outer casing (11) by welding. The exhaust fan (42) is electrically connected to the operation panel by wires. The exhaust pipe (43) at one end of the exhaust fan (42) passes through the pre-set through hole at the top of the water storage tank (41) and extends to the upper middle part of the inner side of the water storage tank (41). The connection between the exhaust pipe (43) and the wall of the water storage tank (41) is sealed by a nitrile rubber sealing sleeve. The mesh (44) has a hole diameter of 5mm and can be detachably sleeved on the outer ring of the pipe section of the exhaust pipe (43) located inside the water storage tank (41) by three circumferentially evenly distributed elastic buckles.

6. A wall surface grinding device according to claim 1, characterized in that: The lower end of the outer casing (11) is sealed with a drain pipe (12) with a ball valve via a flange with a rubber sealing gasket. The lower end of the water delivery layer (45) is connected with a spray pipe (46) at equal intervals of 10cm along the circumference. The water pump (13) is electrically connected to the operation panel via a wire. The end of the water delivery pipe (14) away from the water pump (13) passes through the wall of the water storage tank (41) and is sealed and connected to the water delivery layer (45) via a compression fitting.

7. A wall surface grinding device according to claim 1, characterized in that: The inner wall of the water storage tank (41) is symmetrically fixed with slide rails (473) by welding. A T-shaped slide groove is opened on the inner side of the slide rail (473). The inner wall of the slide rail (473) is fixed with a limiting pad (474) by a slot. The slide rail (473) and the sliding strip (471) of the filter plate (47) are slidably connected by the T-shaped slide groove.

8. A wall surface grinding device according to claim 1, characterized in that: The dust collection hood (22) has φ50mm suction ports on both sides of its walls. The suction ports of the dust collection hood (22) are sealed to suction pipes (25) via pagoda-shaped quick connectors. The quick connectors have annular sealing grooves on their outer rings. There are two suction pipes (25), and each suction pipe (25) is connected in series with a corrugated retractable metal telescopic pipe (26). One end of each suction pipe (25) is sealed to the suction ports on both sides of the dust collection hood (22) via quick connectors, and the other end is sealed to the air collection pipe (27) via a three-way connector. The support frame (31) is connected to the dust collection hood (22) via a pin. The shaft is hinged to the fixed end of the electric actuator (28). The telescopic end of the electric actuator (28) is fixedly connected to the connecting ear plate on the outside of the dust collection cover (22) by M10 bolts. The electric actuator (28) is electrically connected to the operation panel by wires. A rubber sleeve (221) is glued to the end of the dust collection cover (22) away from the motor (21). A transparent cover (222) is connected to the middle of the dust collection cover (22) by buckles. A snap-fit ​​groove (223) is opened on the inner side of the wall of the end of the dust collection cover (22) away from the motor (21). A protective pad (224) is embedded in the inner side of the snap-fit ​​groove (223).

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