Dust-proof wall polisher

Abstract

This invention discloses a dust-proof wall sander, comprising: a mounting plate; an electric sanding disc connected to the front of the mounting plate, with a gap between the mounting plate and the sanding disc; a sanding hood surrounding the gap between the mounting plate and the sanding disc, forming a cavity; a negative pressure pipe connected to the back of the mounting plate, one end of the negative pressure pipe communicating with the cavity, and the other end connected to an external negative pressure pump; and a suction assembly for attracting sanding dust, the suction assembly including multiple suction tubes laid outside the sanding hood, the first ends of the multiple suction tubes being distributed around the outer periphery of the sanding hood, and the second ends of the multiple suction tubes communicating with an annular manifold, the annular manifold being connected to the negative pressure pipe via a connecting pipe. This invention avoids dust generation and meets the requirements of green construction.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a dust-proof wall sander. Background Technology

[0002] A wall sander is a device that replaces the traditional manual sanding of walls with sandpaper, aiming to achieve a smooth, dust-free surface while protecting the physical and mental health of workers, thereby optimizing the working environment, improving work efficiency, and enhancing the quality of decoration.

[0003] Existing wall sanders consist of sandpaper mounted on a sanding disc with a sanding cover. When sanding, the worker holds the sanding rod and places the sanding disc against the wall surface to be sanded. The worker then starts the sanding motor. Simultaneously, a dust collection device located on one side of the motor generates negative pressure, drawing the sanding powder into a dust bag. During the sanding process, the worker continuously moves the sanding rod to move the sanding disc along the wall surface at a uniform speed.

[0004] However, when the rubber sander hood rubs against the wall, it deforms along the direction of movement due to the pressure between the hood and the wall. The front part of the hood bends towards the sanding wheel, while the rear part bends away from the sanding wheel. Some dust will fly out from the gap between the hood and the wall. Especially under the influence of inertia, the hood that bends away from the sanding wheel is more prone to dust flying out, resulting in a poor sanding environment. Secondly, when workers are sanding the ceiling, the flying dust falls from the top, affecting their vision and judgment of the flatness of the sanding position, making it inconvenient for workers to operate. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a dust-proof wall sander that solves the dust problem and meets the requirements of green construction.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: a dust-proof wall sander, comprising:

[0007] Installation disk;

[0008] An electric grinding disc is connected to the front of the mounting plate, and a gap is left between the mounting plate and the grinding disc;

[0009] A polishing hood that surrounds the mounting plate and the polishing plate and covers the gap to form a cavity;

[0010] A negative pressure pipe is connected to the back of the mounting plate, with one end of the negative pressure pipe connected to the cavity and the other end connected to an external negative pressure pump.

[0011] A suction component for attracting dust generated during grinding includes multiple suction tubes laid outside the grinding hood. The first ends of the multiple suction tubes are distributed on the outer periphery of the grinding hood, and the second ends of the multiple suction tubes are connected to an annular manifold. The annular manifold is connected to the negative pressure pipe through a connecting pipe.

[0012] A further improvement of the dust-proof wall sander of the present invention is that the connecting pipe is equipped with a regulating valve for adjusting the air pressure flowing into the annular manifold.

[0013] A further improvement of the dust-proof wall sander of the present invention is that the annular manifold is further provided with a control component for adjusting the air pressure flowing into the suction pipe.

[0014] A further improvement of the dust-proof wall sander of the present invention is that the control component includes: an arc-shaped plate movably fitted inside the annular manifold, the arc-shaped plate being relatively fixed to the annular manifold in the axial direction, and an adjustment hole being provided on the arc-shaped plate corresponding to the position of each suction tube connecting hole;

[0015] A guide assembly for adjusting the communication area between the adjustment hole and the corresponding communication hole by controlling the movement of the arc plate.

[0016] A further improvement of the dust-proof wall sander of the present invention is that the arc-shaped plate includes a passive plate that is attached to each connecting hole on the inner wall of the annular manifold and provides for the opening of adjustment holes, and an active plate connected to the passive plate. The guiding assembly includes a guide rod fixed on the active plate. The guide rod extends outward from the outer circumference of the annular manifold and forms an extension section outside the pipe. A push rod is fixed on the extension section. The push rod is fixed to the opposite outer side of the sanding cover. The guide rod and the push rod are designed to drive the passive plate to move in the direction of increasing the connecting area during the process of the sanding cover being squeezed and bulging outward.

[0017] A further improvement of the dust-proof wall sander of the present invention is that a limiting spring is sleeved on the outer side of the guide rod, one end of the limiting spring is connected to the annular manifold, and the other end is connected to the guide rod.

[0018] A further improvement of the dust-proof wall sander of the present invention is that the arc plate is divided into multiple arc segments that are independent of each other and correspond one-to-one with the connecting holes of the multiple suction tubes, and the number of the guide components is multiple and is arranged one-to-one with the multiple arc segments.

[0019] A further improvement of the dust-proof wall sander of the present invention is that the control component further includes a fixed frame installed on the back of the annular manifold and movable in a direction perpendicular to the sanding disc, and a rack installed on the fixed frame in a direction perpendicular to the sanding disc, corresponding to the position of the adjusting valve. The adjusting valve is fitted with a gear that meshes with the rack. A movable rod is fixed on the side of the fixed frame facing the annular manifold in the direction of movement. A movable hole is opened on the back of the annular manifold. The movable rod passes through the movable hole and is locked into the annular manifold through a movable baffle. When the fixed frame moves away from the annular manifold, the rack drives the gear to rotate in the direction of increasing the adjustment valve.

[0020] A further improvement of the dust-proof wall sander of the present invention is that a return spring is provided on the outer sleeve of the movable rod, one end of the return spring is connected to the annular manifold, and the other end is connected to the movable rod.

[0021] A further improvement of the dust-proof wall sander of the present invention is that the control component further includes a ball bearing, the arc plate and the movable baffle abut against each other to form a U-shaped groove for accommodating the ball bearing, and the position where the movable rod is connected to the movable baffle is the bottom of the U-shaped groove.

[0022] Compared with the prior art, the advantages of the present invention are as follows:

[0023] 1. By installing the suction component outside the mounting plate, the dust generated by the grinding plate is absorbed, which meets the requirements of green construction.

[0024] 2. By setting the arc-shaped plate, the suction power of the suction pipe in areas prone to dust is improved, further reducing dust.

[0025] 3. By setting the movable baffle, the regulating valve is automatically adjusted during ceiling grinding, which increases the negative pressure inside the suction hood.

[0026] 4. By setting the ball bearings, the negative pressure in various parts of the annular manifold is continuously disturbed, thus preventing dust from accumulating in the annular manifold. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a rear view of the dust-proof wall sander of the present invention.

[0029] Figure 2 This is a front view of the dust-proof wall sander of the present invention.

[0030] Figure 3 This is a detailed structural diagram of the regulating valve of the dust-proof wall sander of the present invention.

[0031] Figure 4 This is a first cross-sectional schematic diagram of the suction hood of the dust-proof wall sander of the present invention.

[0032] Figure 5 This is a second cross-sectional schematic diagram of the suction hood of the dust-proof wall sander of the present invention.

[0033] Figure 6 This is a diagram showing the vertical wall sanding process of the dust-proof wall sander of the present invention.

[0034] Figure 7 This is a diagram showing the dust-proof wall sander of the present invention during roof sanding.

[0035] In the diagram: 1. Mounting plate; 2. Connecting bracket; 3. Grinding rod; 4. Negative pressure pipe; 5. Grinding cover; 6. Sandpaper; 71. Annular manifold; 72. Suction tube; 81. Arc plate; 82. Connecting hole; 83. Adjusting hole; 84. Guide rod; 85. Push rod; 86. Telescopic rod; 87. Telescopic cylinder; 88. Limiting spring; 91. Movable baffle; 92. Movable rod; 93. Fixed bracket; 94. Rack; 95. Gear; 96. Adjusting valve; 97. Return spring; 10. Grinding disc; 11. Connecting pipe; 12. Ball bearing. Detailed Implementation

[0036] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0037] The dust-proof wall sander of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] Please see Figures 1 to 7 Dust-proof wall sanders include:

[0039] Installation disk 1;

[0040] An electric grinding disc 10 is connected to the front of the mounting disc 1, and a gap is left between the mounting disc 1 and the grinding disc 10;

[0041] A polishing cover 5 surrounds the mounting plate 1 and the polishing plate 10 and covers the gap to form a cavity;

[0042] A negative pressure pipe 4 is connected to the back of the mounting plate 1. One end of the negative pressure pipe 4 is connected to the cavity, and the other end is connected to an external negative pressure pump.

[0043] The suction component for attracting dust generated during grinding includes a plurality of suction tubes 72 laid outside the grinding hood 5. The first ends of the plurality of suction tubes 72 are distributed on the outer periphery of the grinding hood 5, and the second ends of the plurality of suction tubes 72 are connected to an annular manifold 71. The annular manifold 71 is connected to the negative pressure pipe 4 through a connecting pipe 11.

[0044] Specifically, the sanding cover 5 is a rubber sanding cover, which reduces damage to the wall.

[0045] Specifically, the back of the mounting plate 1 is also rotatably connected to a connecting bracket 2. By setting the connecting bracket 2, it is convenient to grind the wall surface from multiple angles, which makes it easier for construction workers to carry out construction operations.

[0046] Specifically, the bottom of the connecting frame 2 is also connected to a grinding rod 3. The grinding rod 3 has a through hole for the negative pressure pipe 4 to connect. By setting the grinding rod 3, it is convenient for construction personnel to hold the grinding rod 3 for construction, thus improving construction efficiency.

[0047] Specifically, the surface of the grinding disc 10 is fully covered with sandpaper 6, and the grinding disc 10 has multiple holes. By setting these holes, it is easy for the dust from the grinding disc 10 grinding the wall to pass through and be absorbed by the negative pressure pipe 4.

[0048] Preferably, the connecting pipe 11 is provided with a regulating valve 96 for adjusting the air pressure flowing into the annular manifold 71.

[0049] Preferably, the annular manifold 71 is further provided with a control component for adjusting the air pressure flowing into the suction pipe 72.

[0050] Preferably, the control component includes: an arc-shaped plate 81 movably sleeved inside the annular manifold 71, the arc-shaped plate 81 being axially fixed relative to the annular manifold 71, and an adjustment hole 83 being provided on the arc-shaped plate 81 corresponding to the position of the communication hole 82 of each suction tube 72.

[0051] A guide assembly for adjusting the communication area between the adjustment hole 83 and the corresponding communication hole 82 by controlling the movement of the arc plate 81.

[0052] The guide assembly prevents the arc plate 81 from moving along the axial direction of the annular manifold 71.

[0053] Preferably, the arc-shaped plate 81 includes a passive plate that is attached to each of the communication holes 82 on the inner wall of the annular manifold 71 and provides for the opening of the adjustment hole 83, and an active plate connected to the passive plate. The guide assembly includes a guide rod 84 fixed on the active plate. The guide rod 84 extends outward from the annular manifold 71 and forms an extension section outside the pipe. A push rod 85 is fixed on the extension section. The push rod 85 is fixed to the opposite outer side of the polishing cover 5. The guide rod 84 and the push rod 85 are designed to drive the passive plate to move in the direction of increasing the communication area during the process of the polishing cover 5 being squeezed and protruding outward.

[0054] Specifically, a telescopic rod 86 is connected between the push rod 85 and the mounting plate 1. The mounting plate 1 is equipped with a telescopic cylinder 87 for sliding connection of the telescopic rod 86. The telescopic cylinder 87 is coaxially arranged with the guide rod 84. By setting the telescopic rod 86, a guiding function is provided for the push rod 85, ensuring the stability of the push rod 85's movement.

[0055] Preferably, the limiting component is a limiting spring 88. The limiting spring 88 is sleeved on the outer side of the guide rod 84. One end of the limiting spring 88 is connected to the annular manifold 71, and the other end is connected to the guide rod 84. Preferably, the arc-shaped plate 81 is divided into multiple independent arc-shaped segments that correspond one-to-one with the connecting holes 82 of the multiple suction tubes 72. The number of the guide components is multiple, and they are arranged one-to-one with the multiple arc-shaped segments.

[0056] Specifically, multiple arc-shaped plates 81 are arranged to abut against each other within the annular manifold 71 to form a ring.

[0057] Preferably, the control assembly further includes a fixed frame 93 mounted on the back of the annular manifold 71 and movable in a direction perpendicular to the grinding disc 10, and a rack 94 mounted on the fixed frame 93 in a direction perpendicular to the grinding disc 10, corresponding to the position of the regulating valve 96. The regulating valve 96 is fitted with a gear 95 that meshes with the rack 94. A movable rod 92 is fixed on one side of the annular manifold 71 in the direction of movement on the fixed frame 93. The back of the annular manifold 71 has a movable hole. The movable rod 92 passes through the movable hole and is engaged in the annular manifold 71 through a movable baffle 91. When the fixed frame 93 moves away from the annular manifold 71, the rack 94 drives the gear 95 to rotate in the direction of increasing the size of the regulating valve 96.

[0058] The structure described above automatically adjusts the negative pressure within the annular manifold 71, making it easy to use.

[0059] Preferably, the movable rod 92 is fitted with a return spring 97, one end of which is connected to the annular manifold 71 and the other end is connected to the movable rod 92.

[0060] Specifically, when the movable baffle 91 is not subjected to external force, there is a gap between the movable baffle 91 and the annular manifold 71, through which the movable baffle 91 is provided with a basis for movement.

[0061] Preferably, the control component also includes a ball bearing 12, the arc plate 81 and the movable baffle 91 abut against each other to form a U-shaped groove for accommodating the ball bearing 12, and the position where the movable rod 92 is connected to the movable baffle 91 is the bottom of the U-shaped groove.

[0062] By setting the ball bearing 12, the negative pressure in the annular manifold 71 can be dynamically adjusted to prevent dust from accumulating in the annular manifold 71.

[0063] The working principle of a dust-proof wall sander is as follows:

[0064] When sanding on a vertical wall, as the sanding cover 5 moves with the sanding rod 3, the portion of the sanding cover 5 at the front end of the moving sanding rod 3 will be squeezed by the wall, causing the portion of the sanding cover 5 to dent. The portion of the sanding cover 5 at the rear end of the moving sanding rod 3 will bulge outward due to friction with the wall. The outward bulging sanding cover 5 will squeeze the push rod 85. Under the guidance of the telescopic rod 86 and the telescopic cylinder 87, the push rod 85 will drive the arc plate 81 to move in the opposite direction to the sanding disc 10. As a result, the overlapping area of ​​the connecting hole 82 and the adjusting hole 83 at the rear end of the movement increases, the amount of gas drawn in by the suction pipe 72 increases, and the dust flying out from the rear end of the grinding can be absorbed. At the front end, because the grinding disc 10 moves to the front end during grinding, the fly ash is not easy to fly out, and a smaller suction area can be used. Thus, the suction pipe 72 can be automatically adjusted according to the direction of grinding movement. Under the rated power of the negative pressure fan, the negative pressure is dispersed to ensure the effective use of the air pressure of the negative pressure fan and facilitate the proper absorption of dust.

[0065] When sanding the roof, the movable baffle 91 will descend due to gravity, which will drive the regulating valve 96 to increase the negative pressure, increase the negative pressure inside the annular manifold 71, and decrease the negative pressure inside the sanding disc. The negative pressure portion located outside the sanding disc 10 will be transferred into the suction pipe 72. Because the dust will fall downwards due to gravity when sanding the roof, the attraction force of the sanding disc 10 can be reduced, and it can also better attract vertical dust. The dust located outside the sanding cover 5 will fall to the worker's eyes. Therefore, the negative pressure of the suction pipe 72 increases, reducing the interference of falling dust on the worker's vision and making it more convenient for the worker to use.

[0066] In addition, in the two embodiments described above, multiple balls 12 are added. When sanding a vertical wall, the balls 12 move to the bottom of the annular manifold 71. The balls 12 expand the opening of the bottom suction tube 72, making it easier for the bottom suction tube 72 to attract dust. Furthermore, as the balls 12 move with the annular manifold 71, they collide and roll relative to each other. The vibration can lift the dust deposited in the annular manifold 71, making it easier for the dust to be transported to the connecting tube 11. In addition, the relative area between the connecting hole 82 and the adjusting hole 83 of the bottom suction tube 72 changes during the movement of the balls 12, so the pressure for attracting dust is constantly changing, making it easier to attract the dust attached to the wall to the suction tube 72.

[0067] When the roof is being sanded, the ball bearing 12 will roll to the top of the movable baffle 91, thereby increasing the moving distance of the movable baffle 91. The opening degree of the regulating valve 96 will be increased, making it easier to draw dust into the suction pipe 72.

[0068] It should be noted that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding and reading. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0069] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the technical solution of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A dust-proof wall sander, characterized in that, include: Installation disk; An electric grinding disc is connected to the front of the mounting plate, and a gap is left between the mounting plate and the grinding disc; A polishing hood that surrounds the mounting plate and the polishing plate and covers the gap to form a cavity; A negative pressure pipe is connected to the back of the mounting plate, with one end of the negative pressure pipe connected to the cavity and the other end connected to an external negative pressure pump. A suction assembly for attracting dust generated during grinding includes multiple suction tubes laid outside the grinding hood. The first ends of the suction tubes are distributed around the outer periphery of the grinding hood, and the second ends of the suction tubes are connected to an annular manifold. The annular manifold is connected to a negative pressure pipe via a connecting pipe. The annular manifold also contains a control assembly for adjusting the air pressure flowing into the suction tubes. The control assembly includes an arc-shaped plate movably fitted inside the annular manifold, the arc-shaped plate being axially fixed relative to the annular manifold. An adjustment hole is provided on the arc-shaped plate corresponding to the position of the connecting hole of each suction tube. The control assembly is used to control the air pressure flowing into the suction tubes. The guide assembly is a movable plate that adjusts the communication area between the adjustment hole and the corresponding communication hole. The arc-shaped plate includes a passive plate that is attached to each communication hole on the inner wall of the annular manifold and provides space for the adjustment hole, and an active plate connected to the passive plate. The guide assembly includes a guide rod fixed on the active plate. The guide rod extends outward from the outer circumference of the annular manifold and forms an extension section outside the pipe. A push rod is fixed on the extension section. The push rod is fixed to the opposite outer side of the grinding cover. The guide rod and the push rod are designed to drive the passive plate to move in the direction of increasing the communication area during the process of the grinding cover being squeezed and bulging outward.

2. The dust-proof wall sander as described in claim 1, characterized in that, The connecting pipe is equipped with a regulating valve for adjusting the air pressure flowing into the annular manifold.

3. The dust-proof wall sander as described in claim 1, characterized in that, A limiting spring is sleeved on the outside of the guide rod. One end of the limiting spring is connected to the annular manifold, and the other end is connected to the guide rod.

4. The dust-proof wall sander as described in claim 1, characterized in that, The arc-shaped plate is divided into multiple arc-shaped segments that are independent of each other and correspond one-to-one with the connecting holes of the multiple straws. The number of guide components is multiple and they are arranged one-to-one with the multiple arc-shaped segments.

5. The dust-proof wall sander as described in claim 1, characterized in that, The control assembly further includes a fixed frame mounted on the back of the annular manifold and movable in a direction perpendicular to the grinding disc, and a rack mounted on the fixed frame in a direction perpendicular to the grinding disc, corresponding to the position of the regulating valve. The regulating valve is fitted with a gear that meshes with the rack. A movable rod is fixed on the side of the fixed frame facing the annular manifold in the direction of movement. A movable hole is opened on the back of the annular manifold. The movable rod passes through the movable hole and is locked into the annular manifold through a movable baffle. When the fixed frame moves away from the annular manifold, the rack drives the gear to rotate in the direction of increasing the regulating valve size.

6. The dust-proof wall sander as described in claim 5, characterized in that, The movable rod is fitted with a return spring, one end of which is connected to the annular manifold and the other end is connected to the movable rod.

7. The dust-proof wall sander as described in claim 5, characterized in that, The control component also includes a ball bearing. The arc-shaped plate and the movable baffle abut against each other to form a U-shaped groove for accommodating the ball bearing. The position where the movable rod connects to the movable baffle is the bottom of the U-shaped groove.

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