CN114393459A - Old building wall planarization is handled with grinding flat device - Google Patents
Old building wall planarization is handled with grinding flat device Download PDFInfo
- Publication number
- CN114393459A CN114393459A CN202111642087.9A CN202111642087A CN114393459A CN 114393459 A CN114393459 A CN 114393459A CN 202111642087 A CN202111642087 A CN 202111642087A CN 114393459 A CN114393459 A CN 114393459A
- Authority
- CN
- China
- Prior art keywords
- gear
- side wall
- smoothing
- old building
- wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
- B24B7/10—Single-purpose machines or devices
- B24B7/18—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like
- B24B7/182—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like for walls and ceilings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/10—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces
- B24B47/12—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces by mechanical gearing or electric power
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
- B24B49/006—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation taking regard of the speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/06—Dust extraction equipment on grinding or polishing machines
- B24B55/10—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided
- B24B55/102—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided with rotating tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
- B24B7/10—Single-purpose machines or devices
- B24B7/18—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like
- B24B7/186—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like with disc-type tools
Abstract
The invention provides a grinding device for flattening old building wall surfaces. The grinding device for the flattening treatment of the old building wall surface comprises a handle; a polishing mechanism; a dust-proof mechanism; a compression mechanism; a connecting mechanism; the dust exhaust mechanism comprises a box body, a hose, a first gear, a second gear, a suction pipe, a rotating shaft and fan blades, wherein the box body is mounted on the side wall of the polishing mechanism, and the rotating shaft and the fan blades are rotatably connected inside the box body; two ends of the rotating shaft are respectively connected with the fan blades and the second gear; the second gear is meshed with the first gear, and the first gear is connected with the side wall of the grinding mechanism; the lateral wall symmetry installation one end of box is the infundibulate the straw, the straw is connected coupling mechanism's lateral wall, just the lateral wall fixed connection of box the hose. The grinding device for the leveling treatment of the old building wall surface has the advantage of preventing dust from flying.
Description
Technical Field
The invention relates to the technical field of building wall surface leveling, in particular to a grinding device for leveling an old building wall surface.
Background
Decoration, which is otherwise called decoration and decoration, refers to a whole set of construction scheme and design scheme which is implemented in a certain area and range, including hydropower construction, wall, floor, ceiling, landscape and the like, and is formed according to a certain design concept and aesthetic rules. Decoration is a technique for performing artistic processing on articles for daily use or living environments. The method comprises the steps of packaging, full packaging, half packaging (light industrial auxiliary materials), bag cleaning and the like.
Old building wall surface finishing material is ageing, and the finishing material fracture and breakable, when polishing to old building wall is level and smooth, the broken a large amount of dusts that produce of finishing material, and the dust is danced in the air and is unfavorable for workman's health.
Therefore, there is a need to provide a new smoothing device for smoothing old building wall surfaces to solve the above technical problems.
Disclosure of Invention
The invention aims to provide a grinding device for smoothing the wall surface of an old building, which can prevent dust from flying.
In order to solve the technical problem, the grinding device for the leveling treatment of the old building wall surface provided by the invention comprises: a handle; one end of the polishing mechanism is fixedly connected with the handle; the dustproof mechanism is connected with the side wall of the polishing mechanism in a sliding manner; the compression mechanism is connected with the side walls of the polishing mechanism and the dustproof mechanism; the connecting mechanism is arranged at the bottom end of the polishing mechanism and is connected with the side wall of the dustproof mechanism in a sliding manner; the dust exhaust mechanism comprises a box body, a hose, a first gear, a second gear, a suction pipe, a rotating shaft and fan blades, wherein the box body is mounted on the side wall of the polishing mechanism, and the rotating shaft and the fan blades are rotatably connected inside the box body; one end of the rotating shaft is fixedly connected with the fan blades, and the other end of the rotating shaft is fixedly connected with the second gear; the second gear is meshed with the first gear, and the first gear is connected with the side wall of the grinding mechanism; the lateral wall symmetry installation one end of box is the infundibulate the straw, the straw is connected coupling mechanism's lateral wall, and one end is inside to be the infundibulate the lateral wall fixed connection of box the hose.
Preferably, the polishing mechanism comprises a shell, a motor, a fixed shaft and a polishing disc, the top end of the shell is fixedly connected with the handle, the motor is arranged in the shell, and the fixed shaft and the polishing disc are rotatably connected in the shell; one end of the fixed shaft is connected with the motor, and the other end of the fixed shaft is fixedly connected with the polishing disc.
Preferably, dustproof mechanism includes fixed plate, rubber pad and rubber ring, the lateral wall sliding connection infundibulate of shell the fixed plate, the annular is installed to the bottom of fixed plate the rubber pad, just it is a plurality of to install the lateral wall equidistance of rubber pad the rubber ring.
Preferably, the compression mechanism comprises a spring, a fixed block and a slide rod, the fixed block is symmetrically and equidistantly mounted on the side wall of the shell, the slide rod is slidably connected inside the fixed block, and one end of the slide rod is fixedly connected with the side wall of the fixed plate; the lateral wall suit of slide bar the spring, just the both ends of spring are connected respectively the fixed block with the lateral wall of fixed plate.
Preferably, the connecting mechanism comprises a fixing ring, a mounting pipe and a connecting pipe, the mounting pipe with arc-shaped side walls is symmetrically mounted on the inner side wall of the shell, and the suction pipe is mounted on the side wall of the mounting pipe; the bottom installation of shell gu fixed ring, gu fixed ring with the inside symmetry installation of shell is a plurality of the connecting pipe, just the one end intercommunication of connecting pipe the installation pipe.
Preferably, the side wall of the fixed shaft is fixedly connected with the first gear, the diameter of the first gear is larger than that of the second gear, and the first gear and the second gear are perpendicular to each other.
Preferably, the housing is mounted inside the box body, and the suction pipe and the hose are respectively located on two sides of the fan blade.
Compared with the prior art, the grinding device for the flattening treatment of the old building wall surface provided by the invention has the following beneficial effects:
the invention provides a grinding device for the smoothing treatment of an old building wall surface, wherein when the wall surface needs to be ground, a grinding mechanism is opened, the grinding mechanism is moved, so that a dustproof mechanism on the side wall of the grinding mechanism is tightly attached to the wall surface, the grinding mechanism is continuously close to the wall surface, the grinding mechanism rotates to grind the wall surface, the grinding mechanism rotates in the dustproof mechanism, and dust generated by grinding the wall surface is remained in the dustproof mechanism; just grinding machanism moves and drives first gear revolve, first gear promotes the second gear rotates, the diameter of first gear is greater than the diameter of second gear makes the rotational speed of second gear is greater than the rotational speed of first gear increases the second gear the pivot with the rotational speed of flabellum, thereby makes the flabellum is in the inside fast turn-round of box, the straw with the inside suction that produces of coupling mechanism makes the inside dust of dustproof machanism passes through coupling mechanism with the straw gets into the inside of box, the flabellum constantly rotates will the box dust is blown in the inside of hose makes the dust pass through hose discharge avoids the dust to fly and dance in the air.
Drawings
FIG. 1 is a schematic structural diagram of a smoothing device for smoothing old building walls according to the present invention;
FIG. 2 is a schematic view of the internal structure of the housing shown in FIG. 1;
FIG. 3 is a top view of the internal structure of the housing shown in FIG. 1;
fig. 4 is an enlarged view of the structure at a shown in fig. 2.
Reference numbers in the figures: 1. the dust removal device comprises a handle, 2, a polishing mechanism, 21, a shell, 22, a motor, 23, a fixed shaft, 24, a polishing disc, 3, a compression mechanism, 31, a spring, 32, a fixed block, 33, a sliding rod, 4, a dust prevention mechanism, 41, a fixed plate, 42, a rubber pad, 43, a rubber ring, 5, a dust removal mechanism, 51, a box body, 52, a hose, 53, a first gear, 54, a second gear, 55, a suction pipe, 56, a rotating shaft, 57, fan blades, 6, a connecting mechanism, 61, a fixed ring, 62, a mounting pipe, 63 and a connecting pipe.
Detailed Description
The invention is further described with reference to the following figures and embodiments.
Referring to fig. 1, fig. 2, fig. 3 and fig. 4, in which fig. 1 is a schematic structural diagram of a smoothing device for smoothing a wall surface of an old building according to the present invention; FIG. 2 is a schematic view of the internal structure of the housing shown in FIG. 1; FIG. 3 is a top view of the internal structure of the housing shown in FIG. 1; fig. 4 is an enlarged view of the structure at a shown in fig. 2. Old building wall planarization is handled with grinding flat device includes: a handle 1; one end of the polishing mechanism 2 is fixedly connected with the handle 1; the dustproof mechanism 4 is connected with the side wall of the polishing mechanism 2 in a sliding manner; the compression mechanism 3 is connected with the side walls of the polishing mechanism 2 and the dustproof mechanism 4; the connecting mechanism 6 is arranged at the bottom end of the polishing mechanism 2, and the connecting mechanism 6 is connected with the side wall of the dustproof mechanism 4 in a sliding manner; the dust exhaust mechanism 5 comprises a box body 51, a hose 52, a first gear 53, a second gear 54, a suction pipe 55, a rotating shaft 56 and fan blades 57, the box body 51 is mounted on the side wall of the grinding mechanism 2, and the rotating shaft 56 and the fan blades 57 are rotatably connected inside the box body 51; one end of the rotating shaft 56 is fixedly connected with the fan blade 57, and the other end of the rotating shaft 56 is fixedly connected with the second gear 54; the second gear 54 is meshed with the first gear 53, and the first gear 53 is connected with the side wall of the grinding mechanism 2; the lateral wall symmetry installation one end of box 51 is funnel-shaped straw 55, straw 55 connects coupling mechanism 6's lateral wall, and one end is inside to be funnel-shaped box 51's lateral wall fixed connection hose 52.
The grinding mechanism 2 comprises a shell 21, a motor 22, a fixed shaft 23 and a grinding disc 24, the top end of the shell 21 is fixedly connected with the handle 1, the motor 22 is arranged in the shell 21, and the fixed shaft 23 and the grinding disc 24 are rotatably connected in the shell 21; one end of the fixed shaft 23 is connected with the motor 22, the other end of the fixed shaft 23 is fixedly connected with the polishing disc 24, and in order to facilitate the operation of the motor 22 in the shell 21, the motor 22 drives the fixed shaft 23 and the polishing disc 24 to rotate, so that the polishing disc 24 rotates to smooth the wall surface.
The connecting mechanism 6 comprises a fixing ring 61, a mounting pipe 62 and a connecting pipe 63, the mounting pipe 62 with arc-shaped side walls is symmetrically mounted on the inner side wall of the shell 21, and the suction pipe 55 is mounted on the side wall of the mounting pipe 62; the bottom installation of shell 21 fixed ring 61, fixed ring 61 with the inside symmetry installation of shell 21 is a plurality of connecting pipe 63, just the one end intercommunication of connecting pipe 63 installation pipe 62, for the convenience the polishing dish 41 is in the lateral wall of fixed ring 61 rotates, fixed ring 61 is hugged closely the lateral wall of polishing dish 41 with the inside wall of fixed plate 41, fixed ring 61 blocks the dust entering the inside of shell 21 makes the entering the inside dust of dustproof mechanism 4 passes through connecting pipe 63 gets into the inside of installation pipe 62.
The side wall of the fixed shaft 23 is fixedly connected with the first gear 53, the diameter of the first gear 53 is larger than that of the second gear 54, the first gear 53 and the second gear 54 are perpendicular to each other, and in order to enable the rotating speed of the second gear 54 to be larger than that of the first gear 53, the rotating speeds of the second gear 54, the rotating shaft 56 and the fan blades 57 are increased.
The housing 21 is installed inside the box 51, and the suction pipe 55 and the hose 52 are respectively located at both sides of the fan 57, so that the suction force is generated inside the suction pipe 55 and the dust inside the box 51 is blown into the hose 52 in order to facilitate the rotation of the fan 57.
The working principle of the grinding device for the leveling treatment of the old building wall surface provided by the invention is as follows: the motor 22 is externally connected with a power supply, and the motor 22 operates in the housing 21, so that the motor 22 drives the fixed shaft 23 and the polishing disc 24 to rotate. Remove shell 21 makes the wall is hugged closely to rubber ring 43, extrudees shell 21 makes it is close to towards the wall to make the mill 24, and the wall extrudees rubber ring 43, thereby promotes fixed plate 41 along the lateral wall of shell 21 slides, fixed plate 41 moves and promotes slide bar 33 is in the inside of fixed block 32, simultaneously fixed plate 41 moves the compression spring 31, spring 31 backward extrusion fixed plate 41 makes it a plurality of the wall is hugged closely to rubber ring 43, works as mill 24 rotates and polishes the wall, and is a plurality of this moment the wall is hugged closely to rubber ring 43, increases the leakproofness between rubber ring 43 and the wall, and the dust that the wall was polished is stayed the inside of dustproof mechanism 4 prevents that the dust from dancing in the air. The fixed shaft 23 rotates to drive the first gear 53 to rotate, the first gear 53 pushes the second gear 54 to rotate, the diameter of the first gear 53 is larger than that of the second gear 54, so that the rotating speed of the second gear 54 is larger than that of the first gear 53, the rotating speeds of the second gear 54, the rotating shaft 56 and the fan blades 57 are increased, the fan blades 57 rotate rapidly in the box body 84, and the suction pipe 55, the mounting pipe 62 and the connecting pipe 63 generate suction force. When beating dish 41 is in when the lateral wall of solid fixed ring 61 rotates, gu fixed ring 61 hugs closely beat the lateral wall of dish 41 with the inside wall of fixed plate 41, gu fixed ring 61 blocks the dust and gets into the inside of shell 21 makes the entering the inside dust of dustproof mechanism 4 passes through connecting pipe 63 gets into the inside of installation tube 62 makes the inside dust of dustproof mechanism 4 passes through connecting pipe 63 installation tube 62 with straw 55 gets into the inside of box 51, flabellum 57 rotates and passes through the dust hose 55 is discharged, avoids the dust to fly and dance in the air, and is convenient for discharge the inside dust of dustproof mechanism 4.
Compared with the prior art, the grinding device for the flattening treatment of the old building wall surface provided by the invention has the following beneficial effects:
the invention provides a polishing device for the planarization treatment of an old building wall surface, wherein when the wall surface needs to be polished, a polishing mechanism 2 is opened, the polishing mechanism 2 is moved, so that a dustproof mechanism 4 on the side wall of the polishing mechanism 2 is tightly attached to the wall surface, the polishing mechanism 2 is continuously close to the wall surface, the polishing mechanism 2 rotates to polish the wall surface, the polishing mechanism 2 rotates in the dustproof mechanism 4, and dust generated by polishing the wall surface is remained in the dustproof mechanism 4; and grinding machanism 2 moves and drives first gear 53 rotates, first gear 53 promotes second gear 54 rotates, the diameter of first gear 53 is greater than the diameter of second gear 54, makes the rotational speed of second gear 54 is greater than the rotational speed of first gear 53, increases second gear 54, pivot 56 with the rotational speed of flabellum 57, thereby makes flabellum 57 be in the inside fast turn of box 51, straw 55 with the inside suction that produces of coupling mechanism 6 makes the inside dust of dustproof mechanism 4 pass through coupling mechanism 6 with straw 55 gets into the inside of box 51, flabellum 57 constantly rotates will the box 51 dust blows in the inside of hose 52 makes the dust pass through hose 52 discharges, avoids the dust to fly in the air.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (7)
1. The utility model provides an old building wall planarization is handled with grinding paper-back edition and is characterized in that, includes:
a handle (1);
one end of the polishing mechanism (2) is fixedly connected with the handle (1);
the dustproof mechanism (4), the dustproof mechanism (4) is connected with the side wall of the polishing mechanism (2) in a sliding mode;
the compression mechanism (3) is connected with the side walls of the grinding mechanism (2) and the dustproof mechanism (4);
the connecting mechanism (6) is mounted at the bottom end of the polishing mechanism (2), and the connecting mechanism (6) is connected with the side wall of the dustproof mechanism (4) in a sliding manner;
the dust exhaust mechanism (5) comprises a box body (51), a hose (52), a first gear (53), a second gear (54), a suction pipe (55), a rotating shaft (56) and fan blades (57), the box body (51) is installed on the side wall of the polishing mechanism (2), and the rotating shaft (56) and the fan blades (57) are rotatably connected inside the box body (51); one end of the rotating shaft (56) is fixedly connected with the fan blade (57), and the other end of the rotating shaft (56) is fixedly connected with the second gear (54); the second gear (54) is meshed with the first gear (53), and the first gear (53) is connected with the side wall of the grinding mechanism (2); the lateral wall symmetry installation one end of box (51) is infundibulate straw (55), straw (55) are connected the lateral wall of coupling mechanism (6), and one end is inside to be infundibulate the lateral wall fixed connection of box (51) hose (52).
2. The smoothing device for smoothing old building wall surfaces according to claim 1, wherein the smoothing mechanism (2) comprises a housing (21), a motor (22), a fixed shaft (23) and a smoothing disc (24), the top end of the housing (21) is fixedly connected with the handle (1), the motor (22) is installed inside the housing (21), and the fixed shaft (23) and the smoothing disc (24) are rotatably connected inside the housing (21); one end of the fixed shaft (23) is connected with the motor (22), and the other end of the fixed shaft (23) is fixedly connected with the polishing disc (24).
3. The smoothing device for smoothing old building wall surface according to claim 2, wherein said dust-proof mechanism (4) comprises a fixing plate (41), a rubber pad (42) and a rubber ring (43), the side wall of said housing (21) is slidably connected with said fixing plate (41) in funnel shape, the bottom end of said fixing plate (41) is installed with said rubber pad (42) in ring shape, and the side wall of said rubber pad (42) is installed with a plurality of said rubber rings (43) at equal intervals.
4. The smoothing device for smoothing old building wall surface according to claim 3, wherein said compressing mechanism (3) comprises a spring (31), a fixed block (32) and a slide rod (33), said fixed block (32) is symmetrically installed on the side wall of said housing (21) at equal intervals, the inside of said fixed block (32) is slidably connected with said slide rod (33), and one end of said slide rod (33) is fixedly connected with the side wall of said fixed plate (41); the side wall of the sliding rod (33) is sleeved with the spring (31), and two ends of the spring (31) are respectively connected with the side walls of the fixing block (32) and the fixing plate (41).
5. The smoothing device for smoothing old building wall surfaces according to claim 3, wherein the connecting mechanism (6) comprises a fixing ring (61), a mounting pipe (62) and a connecting pipe (63), the mounting pipe (62) with an arc-shaped side wall is symmetrically mounted on the inner side wall of the housing (21), and the suction pipe (55) is mounted on the side wall of the mounting pipe (62); the bottom installation of shell (21) fixed ring (61), fixed ring (61) with the inside symmetry installation of shell (21) is a plurality of connecting pipe (63), just the one end intercommunication of connecting pipe (63) installation pipe (62).
6. The smoothing device for smoothing old building wall surface according to claim 2, wherein the side wall of the fixed shaft (23) is fixedly connected with the first gear (53), the diameter of the first gear (53) is larger than that of the second gear (54), and the first gear (53) and the second gear (54) are perpendicular to each other.
7. The smoothing device for smoothing old building wall surface according to claim 2, wherein the housing (21) is installed inside the box body (51), and the suction pipe (55) and the hose (52) are respectively located at two sides of the fan blade (57).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111642087.9A CN114393459A (en) | 2021-12-29 | 2021-12-29 | Old building wall planarization is handled with grinding flat device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111642087.9A CN114393459A (en) | 2021-12-29 | 2021-12-29 | Old building wall planarization is handled with grinding flat device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114393459A true CN114393459A (en) | 2022-04-26 |
Family
ID=81228803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111642087.9A Withdrawn CN114393459A (en) | 2021-12-29 | 2021-12-29 | Old building wall planarization is handled with grinding flat device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114393459A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115816199A (en) * | 2023-02-17 | 2023-03-21 | 山西建筑工程集团有限公司 | Building construction cambered surface wall body grinding device |
-
2021
- 2021-12-29 CN CN202111642087.9A patent/CN114393459A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115816199A (en) * | 2023-02-17 | 2023-03-21 | 山西建筑工程集团有限公司 | Building construction cambered surface wall body grinding device |
| CN115816199B (en) * | 2023-02-17 | 2023-05-05 | 山西建筑工程集团有限公司 | Construction cambered surface wall body grinding device |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20220426 |
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| WW01 | Invention patent application withdrawn after publication |