Wall surface grinding device for constructional engineering

Abstract

The invention relates to the technical field of grinding, in particular to a building engineering wall surface grinding device which comprises a grinding head, a dust suction box and a handheld rod. A negative pressure mechanism is arranged in the dust suction box, and the two ends of the handheld rod communicate with the polishing head and the dust suction box through hoses correspondingly. A covering film is detachably mounted in the handheld rod, is made of a flexible material, is in a cylindrical shape coaxial with the handheld rod in an initial state, and is shrunk in the axial direction of the handheld rod; an elastic sheet ring is mounted at one end of the covering film, the edge of the other end is rolled inwards, and the outer wall surfaces are adhered together to block the other end of the covering film; a step used for supporting the elastic piece ring is arranged at the end, close to the grinding head, in the handheld rod. The negative pressure mechanism sucks the interior of the handheld rod, the covering film extends in the axial direction, then the adhesion position at the other end of the covering film is separated and adheres to the inner wall of the handheld rod, dust is prevented from making direct contact with the inner wall of the handheld rod, the covering film can be directly taken out and discarded after being used for a certain time, the handheld rod does not need to be cleaned, and use is convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of grinding, and particularly relates to a wall surface grinding device for construction engineering. Background Art

[0002] In construction engineering, the building walls need to be ground. In order to prevent the dust generated by wall grinding from escaping and affecting the environment and the physical health of construction workers, the grinding devices in the prior art use a dust collection device to collect the dust. This structure is generally realized by holding a grinding device and connecting it to a cavity with a negative pressure suction system for storing dust at the back. In order to facilitate wall grinding, the handheld grinding device needs to be moved around, so the two are often connected by a hose. Since the entire hose is exposed, the hose will droop freely, affecting the operation of the operator. Therefore, in some devices, the middle section of the hose is inserted into the handheld rod, and the handheld rod is used as part of the pipeline for the dust to flow, which can not only save space but also reduce the amount of the hose and thus reduce the weight of the handheld part.

[0003] Due to its own deformation ability, the hose can shake off the dust accumulated on the inner wall under the action of knocking and vibration. However, the handheld rod part is a hard rod. In weather conditions such as the southern humid period, the wall is damp, and the dust falling off the wall during wall grinding is more likely to stick to the inner wall of the handheld rod and is not easy to fall off, easily causing blockage and affecting the normal use of the device. Summary of the Invention

[0004] The present invention provides a wall surface grinding device for construction engineering to solve the problem that the dust collected by the existing grinding device is easy to accumulate in the handheld rod and affect the use of the device.

[0005] The following technical scheme is adopted for a wall surface grinding device for construction engineering of the present invention: A wall surface grinding device for construction engineering includes a grinding head, a dust suction box and a handheld rod; a negative pressure mechanism is arranged in the dust suction box, and both ends of the handheld rod are communicated with the grinding head and the dust suction box through a hose respectively. The negative pressure mechanism sends the dust generated at the grinding head to the dust suction box through the hose and the handheld rod; a film is detachably installed in the handheld rod. The film is a flexible material and is in a cylindrical shape coaxial with the handheld rod in the initial state and contracts in its axial direction; a spring ring is installed at one end of the film, and the other end edge is rolled inwards and the outer wall surfaces are pasted together to block the other end of the film; a step for supporting the spring ring is arranged at one end of the handheld rod close to the grinding head. The film is installed in the handheld rod, and the end with the spring ring is located on the side far from the dust suction box of the blocked end, and the spring ring abuts against the step; the negative pressure mechanism sucks the inside of the handheld rod, first makes the film elongate in its axial direction, and then makes the adhesion part of the other end of the film separate and paste on the inner wall of the handheld rod.

[0006] Optionally, an installation opening is formed in the outer peripheral wall of one end of the handheld rod close to the grinding head, and the installation opening communicates with the inside and outside of the handheld rod; and a retaining cover is detachably installed at the installation opening.

[0007] Optionally, the step is jointly defined by steps formed on the inner wall of the handheld rod and the inner wall of the retaining cover; the step includes a vertical surface parallel to the axis of the handheld rod and a horizontal surface perpendicular to the axis of the handheld rod, and the vertical surface is located on the side of the horizontal surface away from the dust suction box and on the side of the horizontal surface away from the axis of the handheld rod; the vertical surfaces on the inner wall of the handheld rod and the retaining cover enclose an annular surface coaxial with the handheld rod, and the horizontal surfaces on the inner wall of the handheld rod and the retaining cover enclose an annular surface coaxial with the handheld rod; an annular wedge block is further arranged in the handheld rod, and a wedge-shaped groove is defined between the wedge block and the vertical surface of the step; the elastic sheet ring of the film is supported against the horizontal surface and its edge is inserted into the wedge-shaped groove when subjected to negative pressure suction and is restricted by the wedge block from separating from the step.

[0008] Optionally, in the initial state, the middle of the elastic sheet ring bulges outwards from the film, so that the elastic sheet ring is inclined from the middle to its edge; the elastic sheet ring is pushed by the wedge block to be recessed inwards when entering the handheld rod.

[0009] Optionally, the hose is a corrugated pipe.

[0010] Optionally, the hose is detachably connected to the grinding head, the handheld rod and the dust suction box.

[0011] Optionally, the handheld rod is connected to the grinding head through a U-shaped frame. The closed end of the U-shaped frame is fixed to the handheld rod, and the open ends are respectively located on both sides of the grinding head and are hinged to the grinding head through a friction rotating pair.

[0012] Optionally, the film is made of a transparent material, and a transparent section is arranged on the handheld rod for observing the accumulation of dust inside the film.

[0013] Optionally, a rubber sleeve is arranged outside the handheld rod.

[0014] Optionally, the outer diameter of the film after being stretched is the same as the inner diameter of the handheld rod.

[0015] The beneficial effects of the present invention are as follows: By installing a film in the handheld rod, the wall surface grinding device for construction engineering of the present invention avoids direct contact between dust and the inner wall of the handheld rod. After using for a certain period of time, the film can be directly taken out and discarded without cleaning the handheld rod, which is convenient to use.

[0016] Furthermore, one end of the film is provided with an elastic sheet ring, and the elastic sheet ring is set to be a curved surface with a convex middle, which not only facilitates guiding itself into the handheld rod by using its own inclined surface, but also can be stuck in the wedge-shaped groove after deformation to reliably install the film in the handheld rod. Description of the Drawings

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic diagram of the overall structure of an embodiment of a wall surface grinding device for construction engineering according to the present invention; Figure 2 It is a front view of the overall structure of an embodiment of a wall surface grinding device for construction engineering according to the present invention; Figure 3 For Figure 2 The sectional view taken along the A-A direction in Figure 4 For Figure 3 The enlarged view at position B in Figure 5 For Figure 4 The enlarged view at position C in Figure 6 It is a schematic diagram of the structure in the initial state of the film covering in an embodiment of a wall surface grinding device for construction engineering according to the present invention; Figure 7 For Figure 6 The sectional view taken along the D-D direction in

[0019] In the figure: 100, grinding head; 200, dust suction box; 210, negative pressure mechanism; 300, hand-held rod; 310, hose; 320, baffle; 330, U-shaped frame; 340, rubber sleeve; 400, film covering; 410, elastic ring. Detailed implementation manners

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0021] An embodiment of a wall surface grinding device for construction engineering according to the present invention, as Figures 1 to 7 shown, includes a grinding head 100, a dust suction box 200 and a hand-held rod 300.

[0022] A negative pressure mechanism 210 is provided inside the dust suction box 200. Both ends of the handheld rod 300 are connected to the grinding head 100 and the dust suction box 200 through a hose 310. The negative pressure mechanism 210 sends the dust generated at the grinding head 100 to the dust suction box 200 through the hose 310 and the handheld rod 300. Among them, the hose 310 is a corrugated pipe, and the hose 310 is detachably connected to the grinding head 100, the handheld rod 300 and the dust suction box 200, which is convenient for removing the hose 310 and cleaning its interior by shaking or squeezing.

[0023] A film covering 400 is detachably installed inside the handheld rod 300. The film covering 400 is made of a flexible material, such as a disposable plastic film, and is in a cylindrical shape coaxial with the handheld rod 300 in its initial state and shrinks axially to facilitate installation. Preferably, the outer diameter of the film covering 400 after being expanded is the same as the inner diameter of the handheld rod 300, and the length after being expanded is the same as the length of the handheld rod 300. One end of the film covering 400 is provided with a spring ring 410, and the other end edge is inwardly rolled up and the outer wall surfaces are pasted together to block the other end of the film covering 400. A step for supporting the spring ring 410 is provided at one end of the handheld rod 300 close to the grinding head 100. The film covering 400 is installed inside the handheld rod 300, and the end provided with the spring ring 410 is located on the side away from the dust suction box 200 of the blocked end, and the spring ring 410 abuts against the step. The negative pressure mechanism 210 sucks the inside of the handheld rod 300, first makes the film covering 400 elongate axially, and then makes the adhesion part of the other end of the film covering 400 separate and paste on the inner wall of the handheld rod 300.

[0024] The spring ring 410 of the film covering 400 abuts against the step and will not move under the suction of the negative pressure mechanism 210. Since the film covering 400 is made of a flexible material, it is very easy to unfold under the suction of the negative pressure mechanism 210. Since the other end of the film covering 400 is pasted together, the film covering 400 blocks the inside of the handheld rod 300. Continuing suction by the negative pressure mechanism 210 will cause the other end of the film covering 400 to separate from the paste. Since the other end of the film covering 400 is inwardly rolled up and its outer wall surfaces are pasted together, it will be pasted on the inner wall of the handheld rod 300 under the action of the air flow passing through the handheld rod 300 after unfolding, thereby protecting the inner wall of the handheld rod 300. By installing the film covering 400 inside the handheld rod 300, it is avoided that dust directly contacts the inner wall of the handheld rod 300. After using for a certain period of time, the film covering 400 can be directly taken out and discarded, and there is no need to clean the handheld rod 300, which is convenient to use.

[0025] In this embodiment, an installation opening is formed in the outer peripheral wall of one end of the handheld rod 300 close to the grinding head 100. The installation opening communicates with the inside and outside of the handheld rod 300, and the opening angle in the circumferential direction of the handheld rod 300 is not less than 180°, so as to facilitate the installation of the film covering 400 into the handheld rod 300. A retaining cover 320 is detachably installed at the installation opening for sealing the installation opening after the film covering 400 is installed into the handheld rod 300, so that the inside of the handheld rod 300 is kept sealed.

[0026] In this embodiment, the step is jointly defined by steps formed on the inner wall of the handheld rod 300 and the inner wall of the retaining cover 320; the step includes a vertical surface parallel to the axis of the handheld rod 300 and a horizontal surface perpendicular to the axis of the handheld rod 300. The vertical surface is located on the side of the horizontal surface away from the dust suction box 200 and on the side of the horizontal surface away from the axis of the handheld rod 300. The vertical surfaces on the inner wall of the handheld rod 300 and the retaining cover 320 enclose an annular surface coaxial with the handheld rod 300, and the horizontal surfaces on the inner wall of the handheld rod 300 and the retaining cover 320 enclose an annular surface coaxial with the handheld rod 300. An annular wedge block is further arranged in the handheld rod 300, and a wedge-shaped groove is defined between the wedge block and the vertical surface of the step; the elastic sheet ring 410 of the film covering 400 abuts against the horizontal surface and its edge is inserted into the wedge-shaped groove and is restricted by the wedge block from separating from the step when being sucked by negative pressure.

[0027] In this embodiment, in the initial state, the middle of the elastic sheet ring 410 bulges outwards from the film covering 400, so that the elastic sheet ring 410 forms an inclined surface from the middle to its edge, so as to guide the film covering 400 to enter the handheld rod 300 in a direction perpendicular to the axial direction of the handheld rod 300; when the elastic sheet ring 410 enters the handheld rod 300, it is pushed by the wedge block to be recessed inwards, and at the same time, the edge of the elastic sheet ring 410 is stuck in the wedge-shaped groove to limit the installation position of the elastic sheet ring 410.

[0028] In this embodiment, the handheld rod 300 is connected to the grinding head 100 through a U-shaped frame 330. The closed end of the U-shaped frame 330 is fixed to the handheld rod 300, and the open ends are respectively located on both sides of the grinding head 100 and are hinged to the grinding head 100 through a friction rotating pair. When grinding the wall surface, hold the handheld rod 300 by hand to make the grinding head 100 contact with the wall surface, and adjust the angle between the handheld rod 300 and the grinding head 100 by rotating the handheld rod 300, so as to adjust the grinding force or grinding height of the grinding head 100.

[0029] In this embodiment, the film covering 400 is made of a transparent material, and a transparent section is arranged on the handheld rod 300 for observing the dust accumulation situation in the film covering 400.

[0030] In this embodiment, a rubber sleeve 340 is arranged outside the handheld rod 300 to increase the friction force when holding.

[0031] Before the wall surface grinding device for construction engineering of the present invention is used, it is necessary to first remove the cover 320 on the handheld rod 300, install the axially contracted film 400 into the handheld rod 300. During the process of the elastic ring 410 of the film 400 entering the handheld rod 300, it is pressed and deformed. One side of the elastic ring 410 is pressed against the horizontal surface of the step, and the edge is stuck in the wedge-shaped groove; the other end of the film 400 is located inside the handheld rod 300 and on the side of the elastic ring 410 close to the dust suction box 200. After the film 400 is installed, install the cover 320, start the negative pressure mechanism 210 to suck the inside of the handheld rod 300. Under the suction effect, the film 400 first extends and unfolds along its axis, and then the blocked end opens under the negative pressure and adheres to the inner wall of the handheld rod 300. Then, turn off the negative pressure mechanism 210 or directly start the grinding head 100 to start grinding the wall. After using for a period of time, if it is observed through the transparent section on the handheld rod 300 that there is more dust remaining in the film 400, the hose 310 between the handheld rod 300 and the dust suction box 200 can be removed, and the film 400 inside the end of the handheld rod 300 close to the dust suction box 200 can be torn off. Then, remove the cover 320, take out the film 400, and install a new film 400. After the hose 310 is cleaned by shaking, install it back on the handheld rod 300 and the dust suction box 200, and then start the negative pressure mechanism 210 again to make the film 400 fit inside the handheld rod 300.

[0032] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wall surface grinding device for construction engineering, characterized in that: Includes sanding head, dust box and hand-held wand; A negative pressure mechanism is provided in the dust box, and the two ends of the hand-held rod are respectively connected to the grinding head and the dust box through hoses. The negative pressure mechanism sends the dust generated at the grinding head to the dust box through the hose and the hand-held rod; A film is detachably installed in the hand-held rod. The film is made of flexible material and is initially in the shape of a tube coaxial with the hand-held rod and shrinks in its axial direction. A spring ring is installed at one end of the film, and the edge of the other end is rolled inward and the outer wall surfaces are glued together to seal the other end of the film. A step for supporting the spring ring is provided at the end of the hand-held rod close to the grinding head. The film is installed in the hand-held rod, and the end with the spring ring is located on the side of the sealed end away from the dust box, and the spring ring rests on the step. The negative pressure mechanism sucks the inside of the hand-held rod, first stretching the film in its axial direction, and then detaching the adhesion at the other end of the film and sticking it to the inner wall of the hand-held rod.

2. A wall surface grinding device for construction engineering according to claim 1, characterized in that: An installation opening is provided on the outer peripheral wall of one end of the hand-held rod close to the grinding head, and the installation opening is connected with the inside and outside of the hand-held rod; and a blocking cover is detachably installed at the installation opening.

3. A wall surface grinding device for construction engineering according to claim 2, characterized in that: The step is defined by steps opened on the inner wall of the hand-held rod and the inner wall of the baffle cover; the step includes a vertical surface parallel to the axis of the hand-held rod and a horizontal surface perpendicular to the axis of the hand-held rod, the vertical surface is located on the side of the horizontal surface away from the dust box and on the side of the horizontal surface away from the axis of the hand-held rod; the vertical surface of the inner wall of the hand-held rod and the vertical surface on the baffle cover form an annular surface coaxial with the hand-held rod, and the horizontal surface of the inner wall of the hand-held rod and the horizontal surface on the baffle cover form an annular surface coaxial with the hand-held rod; an annular wedge block is also provided in the hand-held rod, and a wedge-shaped groove is defined between the wedge block and the vertical surface of the step; the coated spring ring bears on the horizontal surface and when subjected to negative pressure suction, its edge is inserted into the wedge-shaped groove and is restricted by the wedge block to separate from the step.

4. A wall surface grinding device for construction engineering according to claim 1, characterized in that: In the initial state, the middle of the spring ring protrudes outward from the covering film, so that the spring ring is inclined from the middle to its edge; when the spring ring enters the hand-held rod, it is pushed inward by the wedge block.

5. The wall surface grinding device for construction engineering according to claim 1, characterized in that: The hose is a corrugated tube.

6. A wall surface grinding device for construction engineering according to claim 1, characterized in that: The hose is detachably connected to the grinding head, the hand-held rod and the dust box.

7. A wall surface grinding device for construction engineering according to claim 1, characterized in that: The hand-held rod is connected to the grinding head through a U-shaped frame, the closed end of the U-shaped frame is fixed to the hand-held rod, and the open ends are respectively located on both sides of the grinding head and are hinged with the grinding head through a friction rotating pair.

8. The wall surface grinding device for construction engineering according to claim 1, characterized in that: The film is made of transparent material, and a transparent section is provided on the hand-held rod to observe the dust accumulation in the film.

9. A wall surface grinding device for construction engineering according to claim 1, characterized in that: A rubber sleeve is arranged outside the hand-held rod.

10. The wall surface grinding device for construction engineering according to claim 1, characterized in that: The outer diameter of the expanded film is consistent with the inner diameter of the hand-held rod.

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