CN114352065A - Wall body patching device - Google Patents
Wall body patching device Download PDFInfo
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- CN114352065A CN114352065A CN202210079424.6A CN202210079424A CN114352065A CN 114352065 A CN114352065 A CN 114352065A CN 202210079424 A CN202210079424 A CN 202210079424A CN 114352065 A CN114352065 A CN 114352065A
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Abstract
The invention belongs to the technical field of building decoration, and particularly relates to a wall repairing device which comprises a vehicle body, wherein an electric lifting frame is arranged at the upper end of the vehicle body, a rotating platform is arranged at the upper end of the electric lifting frame, a rotating motor is fixedly arranged in the middle of the upper end of the rotating platform, a threaded rod is fixedly connected to the output end of the rotating motor, a moving block is in threaded connection with the threaded rod, the moving block is hinged to a connecting plate, a supporting rod is arranged on one side of the upper end of the rotating platform, a supporting plate is fixedly connected to the upper end of the supporting rod, a joint filling shell is placed in the middle of the supporting plate and fixedly connected with the connecting plate, and an elastic expansion belt is arranged at the upper end of the joint filling shell; the invention changes the filling angle of the joint filling shell through the matching of the motor, the threaded shaft, the moving block, the connecting plate, the joint filling shell, the supporting plate, the telescopic belt and the supporting rod, thereby satisfying the requirements of repairing the wall bodies at different angles and having high efficiency and low danger.
Description
Technical Field
The invention belongs to the technical field of building decoration, and particularly relates to a wall repairing device.
Background
After the building is completed, the house building is very easy to crack on the surface of the wall body due to the influence of the environment and the building materials, the aesthetic degree of the surface of the building is influenced, and even the safe use of the building is influenced, so that the gap of the wall body needs to be repaired to prevent the gap from being gradually increased, and thus huge loss is caused.
Present gap patching device need carry out the manual filling liquid of pressing down just can be with inside when using more, the operation is comparatively hard, when mending to high higher wall body crack, there are a lot of defects, (1) the staff need carry the crane, the climbing crane, just can carry out the wall body crack of higher department and repair, danger is higher, (2) to not with perpendicular to the ground, but be certain inclination's wall body with ground, the staff need face upward the head or hang down the head always and just can carry out the wall and repair, staff's the degree of difficulty of repairing has been improved, the efficiency is reduced, and certain danger has, (3) one side wall body repairs the back of accomplishing, the staff need follow the crane, will carry another side wall body crack position to the crane, at the climbing crane. The crack repair is very complicated and the working efficiency is low.
Disclosure of Invention
In view of the problems in the prior art, the present invention is directed to a wall repair device.
In order to achieve the purpose, the invention adopts the following technical scheme:
a wall repair device comprising: the lifting device comprises a vehicle body, wherein an electric lifting frame is mounted at the upper end of the vehicle body, a rotating platform is arranged at the upper end of the electric lifting frame, a rotating motor is fixedly mounted in the middle of the upper end of the rotating platform, the output end of the rotating motor is fixedly connected with a threaded rod, a moving block is in threaded connection with the threaded rod, and the moving block is hinged with a connecting plate;
the joint filling device is characterized in that a supporting rod is arranged on one side of the upper end of the rotating platform, a supporting plate with a semi-annular cross section is fixedly connected to the upper end of the supporting rod, a joint filling shell is placed in the middle of the supporting plate, a second electric push rod is arranged in the joint filling shell, a piston plate is fixedly connected to the telescopic end of the second electric push rod, one end, far away from a discharge port, of the joint filling shell is fixedly connected with a connecting plate, an elastic telescopic belt is arranged on the upper end of the joint filling shell, and two ends of the telescopic belt are fixedly connected with the supporting plate respectively.
Preferably, the constant head tank has been seted up at backup pad upper end middle part, the symmetry is provided with first electric push rod in the constant head tank, the flexible end rigid coupling of first electric push rod has the mounting panel, the poling that communicates with the constant head tank is seted up at the bracing piece middle part, it is provided with the straight-bar to slide in the poling, straight-bar upper end and mounting panel rigid coupling, bracing piece week side symmetry is seted up with the kerve side channel that communicates, the side channel is all slided and is provided with the right-angle bar, a plurality of locating holes have been seted up to the last annular that is of rotating platform, right-angle bar one end and straight-bar rigid coupling, the other end and one of them locating hole joint.
Preferably, the lower end of the straight rod and the bottom of the through groove are fixedly provided with a buffer spring.
Preferably, the rotating platform is provided with a ring groove, the lower end of the support rod extends into the ring groove, the extending end of the support rod is fixedly connected with a limiting plate, the lower end of the limiting plate is provided with a ball, and the ball is in rolling contact with the ring groove.
Preferably, spread groove and fixed slot have been seted up respectively to casing lower extreme from the top down of caulking, the fixed slot middle part is provided with the wedge, the wedge cross-section is isosceles triangle, the mounting panel upper end is provided with the slide bar, the symmetry is provided with two pole covers, two on the slide bar equal rigid coupling in pole cover upper end has the tensioning plate, two equal rigid coupling in tensioning plate upper end has the fixed plate, and two fixed plates are close to the end and laminate each other.
Preferably, a tightening spring is fixedly arranged between the two tensioning plates.
Preferably, the connecting groove and the fixed groove are arc-shaped in cross section, and the arc length of the fixed groove is greater than that of the connecting groove.
Preferably, a protection frame is fixedly arranged at the upper end of the rotating platform, the threaded rod penetrates through the protection frame, and the penetrating position of the threaded rod is rotatably arranged.
Preferably, a controller is arranged on the vehicle body.
Compared with the prior art, the invention has the following technical effects:
according to the wall repairing device provided by the invention, the filling angle of the joint filling shell is changed through the matching of the motor, the threaded shaft, the moving block, the connecting plate, the joint filling shell, the supporting plate, the telescopic belt and the supporting rod, so that the wall repairing at different angles is met, the whole device does not need workers to climb the lifting frame, and does not need workers to face up or lower all the time to repair the wall, the repairing difficulty of the workers is reduced, the efficiency is improved, and the repairing danger is reduced.
The joint filling shell is in a horizontal state through the matching of a motor, a threaded shaft, a moving block, a connecting plate, a joint filling shell, a supporting plate, a telescopic belt and a supporting rod, a fixed groove, a connecting groove and a positioning groove are vertically aligned, the lower end of a right-angle rod is separated from the positioning hole through the matching of a first electric push rod, a mounting plate, the positioning groove, a through groove, a straight rod, a side groove, a right-angle rod and the positioning hole, the joint filling shell can rotate circumferentially, the joint filling shell is fixed with the supporting plate through the matching of the mounting plate, the sliding rod, a rod sleeve, a tensioning plate, a fixing plate, a wedge-shaped plate, the connecting groove and the fixed groove, the motor drives the threaded rod to rotate and drives the moving block to rotate circumferentially, the connecting plate drives the joint filling shell to rotate circumferentially, balls rotate in the annular groove, the change of the direction of a joint filling needle head of the joint filling shell is finished, the wall body can be quickly repaired, and the efficiency is high, the angle change of the joint filling shell is matched, so that the change of the direction of the joint filling needle of the joint filling shell is met, the change of the angle of the joint filling needle of the joint filling shell is met, and the joint filling effect is good.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
Fig. 1 is a schematic front view of a wall repair apparatus according to an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of position A of FIG. 1;
FIG. 3 is a schematic front view of a repair for a sloped wall according to an embodiment of the present invention;
FIG. 4 is a schematic front view of a prosthetic device provided in accordance with an embodiment of the invention as it rotates;
FIG. 5 is a schematic structural view of a support plate provided according to an embodiment of the present invention;
FIG. 6 is a schematic side view of a wall repair apparatus according to an embodiment of the present invention;
FIG. 7 is an enlarged schematic view of position B of FIG. 6;
fig. 8 is a schematic structural view illustrating a fixing of a fixing plate to a caulking housing according to an embodiment of the present invention;
FIG. 9 illustrates a schematic top view of a rotating platform provided in accordance with an embodiment of the present invention;
the reference numbers in the figures illustrate: 1. a vehicle body; 2. an electric lifting frame; 3. rotating the platform; 4. rotating the motor; 5. a moving block; 6. a threaded rod; 7. a connecting plate; 8. a caulking housing; 9. a stretchable band; 10. a support plate; 11. a support bar; 12. positioning a groove; 13. a first electric push rod; 14. mounting a plate; 15. a slide bar; 16. a rod sleeve; 17. a tension plate; 18. tightening the spring; 19. a fixing plate; 20. a controller; 21. connecting grooves; 22. fixing grooves; 23. a wedge block; 24. penetrating a groove; 25. a straight rod; 26. a buffer spring; 27. a right-angle rod; 28. a side groove; 29. positioning holes; 30. a ring groove; 31. a limiting plate; 32. a ball bearing; 33. a piston plate; 34. a second electric push rod; 35. a protective frame.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further clarified by combining the specific drawings.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 to 9, the present invention provides a wall repairing apparatus, including: the device comprises a vehicle body 1, wherein an electric lifting frame 2 is installed at the upper end of the vehicle body 1, a rotating platform 3 is arranged at the upper end of the electric lifting frame 2, a rotating motor 4 is fixedly installed in the middle of the upper end of the rotating platform 3, a threaded rod 6 is fixedly connected to the output end of the rotating motor 4, a moving block 5 is in threaded connection with the threaded rod 6, and the moving block 5 is hinged to a connecting plate 7;
the sealing device is characterized in that a supporting rod 11 is arranged on one side of the upper end of the rotating platform 3, a supporting plate 10 with a semi-annular cross section is fixedly connected to the upper end of the supporting rod 11, a joint filling shell 8 is placed in the middle of the supporting plate 10, a second electric push rod 34 is arranged in the joint filling shell 8, a piston plate 33 is fixedly connected to the telescopic end of the second electric push rod 34, one end, far away from a discharge port, of the joint filling shell 8 is fixedly connected with a connecting plate 7, an elastic telescopic belt 9 is arranged at the upper end of the joint filling shell 8, the arrangement of the telescopic belt 9 avoids the risk that the joint filling shell 8 breaks away from the supporting plate 10, and two ends of the telescopic belt 9 are fixedly connected with the supporting plate 10 respectively.
Specifically, when the wall needs to be repaired, a button on the controller 20 is pressed to lift the electric lifting frame 2, the vehicle body 1 is pushed after the electric lifting frame is lifted to a proper position, a caulking needle head of the caulking shell 8 extends into a crack, the second electric push rod 34 is started to drive the piston plate 33 to move, the filling material is extruded into the crack, the wall is caulked and repaired, when the wall faces a wall which is not vertical to the ground but has a certain inclination angle with the ground, the filling angle of the caulking shell 8 is changed through the matching of the motor, the threaded shaft, the moving block 5, the connecting plate 7, the caulking shell 8, the supporting plate 10, the expansion band 9 and the supporting rod 11, so that the wall with different angles is repaired, the whole device does not need to climb the lifting frame by workers, does not need to face up or face down by facing the head to repair the wall, and reduces the repairing difficulty of the workers, the efficiency is improved, the danger of repairing has been reduceed, during specific operation, starter motor, the motor drives threaded rod 6 and rotates, rotary platform is fixed bracing piece 11, backup pad 10 is spacing to 8 downside and front and back sides of caulking, the telescopic band 9 is spacing to 8 upper ends of the casing of caulking, 8 casings of caulking are spacing to connecting plate 7, thereby it is spacing to 5 circumference of movable block, make movable block 5 can only reciprocate, movable block 5 reciprocates, casing 8 of caulking is pulled through connecting plate 7, and make casing 8 of caulking take place to rotate, thereby the filling angle of adjustment casing 8 of caulking, thereby accomplish the wall body repair to different inclination.
According to the invention, a positioning groove 12 is formed in the middle of the upper end of the supporting plate 10, first electric push rods 13 are symmetrically arranged in the positioning groove 12, a mounting plate 14 is fixedly connected to the telescopic end of each first electric push rod 13, a through groove 24 communicated with the positioning groove 12 is formed in the middle of the supporting rod 11, a straight rod 25 is slidably arranged in the through groove 24, the upper end of the straight rod 25 is fixedly connected with the mounting plate 14, side grooves 28 communicated with the through groove 24 are symmetrically formed in the peripheral side of the supporting rod 11, right-angle rods 27 are slidably arranged in the side grooves 28, a plurality of positioning holes 29 are annularly formed in the rotating platform 3, one end of each right-angle rod 27 is fixedly connected with the straight rod 25, and the other end of each right-angle rod 27 is clamped with one of the positioning holes 29.
Through first electric push rod 13, mounting panel 14, constant head tank 12, wear groove 24, straight-bar 25, side groove 28, right angle pole 27, the cooperation of locating hole 29, fix the dead lever, thereby it is fixed to backup pad 10, when making threaded rod 6 rotate, the movable block 5 only reciprocates, circumferential direction does not take place, thereby when making threaded rod 6 rotate, movable block 5 reciprocates, connecting plate 7 pulling joint filling casing 8, make joint filling casing 8 take place to rotate, the filling angle of adjustment joint filling casing 8, the completion is repaired different inclination's wall body.
According to the invention, when the support bar 11 and the support plate 10 are fixed, a buffer spring 26 is fixed at the lower end of the straight bar 25 and the bottom of the through groove 24 for damping the device.
According to the invention, in order to enable the caulking shell 8 to rotate circumferentially and repair wall bodies in different directions rapidly, the rotating platform 3 is provided with the annular groove 30, the lower end of the supporting rod 11 extends into the annular groove 30, the extending end of the supporting rod is fixedly connected with the limiting plate 31, the limiting plate 31 is arranged to ensure that the lower end of the supporting rod 11 cannot be separated from the annular groove 30, the lower end of the limiting plate 31 is provided with the ball 32, the ball 32 is in rolling contact with the annular groove 30, and the ball 32 is arranged to reduce friction force during rotation.
According to the invention, the lower end of the caulking shell 8 is respectively provided with a connecting groove 21 and a fixing groove 22 from top to bottom, the middle part of the fixing groove 22 is provided with a wedge-shaped block 23, the section of the wedge-shaped block 23 is in an isosceles triangle shape, the upper end of the mounting plate 14 is provided with a slide rod 15, the slide rod 15 is symmetrically provided with two rod sleeves 16, the upper ends of the two rod sleeves 16 are fixedly connected with tensioning plates 17, the upper ends of the two tensioning plates 17 are fixedly connected with fixing plates 19, and the adjacent ends of the two fixing plates 19 are mutually jointed.
Specifically, after one wall body is repaired, when a crack of a second wall body in different directions needs to be repaired, the crack-filling shell 8 is in a horizontal state through the cooperation of the motor, the threaded shaft, the moving block 5, the connecting plate 7, the crack-filling shell 8, the supporting plate 10, the telescopic belt 9 and the supporting rod 11, the fixing groove 22, the connecting groove 21 and the positioning groove 12 are aligned up and down, the lower end of the right-angle rod 27 is separated from the positioning hole 29 through the cooperation of the first electric push rod 13, the mounting plate 14, the positioning groove 12, the through groove 24, the straight rod 25, the side groove 28, the right-angle rod 27 and the positioning hole 29, so that the crack-filling shell 8 can rotate circumferentially, and during specific operation, the first electric push rod 13 extends to lift the mounting plate 14 to drive the straight rod 25 and the right-angle rod 27 to lift, the right-angle rod 27 is separated from the positioning hole 29, and in the lifting process of the mounting plate 14, the sliding rod 15, the rod sleeve 16, The tensioning plate 17, the fixing plate 19, the wedge-shaped plate, the connecting groove 21 and the fixing groove 22 are matched, the caulking shell 8 and the supporting plate 10 are fixed, during specific operation, the mounting plate 14 is lifted, the slide rod 15, the rod sleeve 16, the tensioning plate 17 and the fixing plate 19 are lifted simultaneously, the fixing plate 19 enters the connecting groove 21, the wedge-shaped plate separates the two fixing plates 19, the tightening spring 18 is stretched, the fixing plate 19 enters the fixing groove 22 to complete the fixation of the caulking shell 8, the fixing effect is good, the caulking shell 8 is prevented from being separated from the fixing plate 19 in the rotating process of the caulking shell 8, the stability and the instantaneity in the rotating process are ensured, after the caulking shell 8 is fixed, when the motor drives the threaded rod 6 to rotate and drives the moving block 5 to rotate circumferentially, the caulking shell 8 is driven to rotate circumferentially through the connecting plate 7, the ball 32 rotates in the annular groove 30, and therefore the change of the direction of a caulking needle head of the caulking shell 8 is completed, the wall body repair can be quickly converted, the efficiency is high, the angle change of the joint filling shell body 8 is matched, the change of the direction of the joint filling needle head of the joint filling shell body 8 is met, the change of the angle of the joint filling needle head of the joint filling shell body 8 is met, and the joint filling effect is good.
After fixed plate 19 got into fixed slot 22, joint filling casing 8 and backup pad 10, bracing piece 11 is equivalent to a whole, when rotating promptly, stop simultaneously, start simultaneously, when there is not fixed plate 19 to joint filling casing 8, when the scram appears, threaded rod 6, movable block 5, connecting plate 7 and joint filling casing 8 can scram, and end backup pad 10, bracing piece 11, limiting plate 31 and ball 32 are because inertia, still keep original speed to remove, backup pad 10 produces the effect of power to joint filling casing 8 side, to the decomposition of power, become power in the horizontal direction and the ascending power in the vertical direction, the horizontal force offsets, telescopic band 9 deformation when vertical power is through joint filling casing 8, make joint filling casing 8 and connecting plate 7 take place to rotate around movable block 5 pin joint, stability is relatively poor.
It will be appreciated that for a change in the angle of the caulking pin of the caulking housing 8, the moving block 5 is moved up and down, and that the moving block 5 is caused to rotate circumferentially when the direction of the caulking pin of the caulking housing 8 is changed.
According to the invention, a tensioning spring 18 is arranged between the two tensioning plates 17.
According to the present invention, in order to increase the fixing effect on the filling casing, the sections of the connecting groove 21 and the fixing groove 22 are both arc-shaped, and the arc length of the fixing groove 22 is greater than the arc length of the connecting groove 21.
According to the invention, a protective frame 35 is fixedly arranged at the upper end of the rotating platform 3, and the threaded rod 6 penetrates through the protective frame 35 and is rotatably arranged at the penetrating position.
According to the invention, a controller 20 is arranged on the vehicle body 1 for the convenience of control of workers.
It is worth noting that: the whole device is controlled by the buttons of the controller 20, and since the equipment matched with the control buttons is common equipment, the device belongs to the existing mature technology, and the electrical connection relationship and the specific circuit structure are not repeated.
The foregoing shows and describes the general principles, essential features, and inventive features of this invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. A wall repair device, comprising: the lifting device comprises a vehicle body, wherein an electric lifting frame is mounted at the upper end of the vehicle body, a rotating platform is arranged at the upper end of the electric lifting frame, a rotating motor is fixedly mounted in the middle of the upper end of the rotating platform, the output end of the rotating motor is fixedly connected with a threaded rod, a moving block is in threaded connection with the threaded rod, and the moving block is hinged with a connecting plate;
the rotary platform is characterized in that a supporting rod is arranged on one side of the upper end of the rotary platform, a supporting plate with a semi-annular cross section is fixedly connected to the upper end of the supporting rod, a joint filling shell is placed in the middle of the supporting plate, one end, far away from a discharge port, of the joint filling shell is fixedly connected with a connecting plate, an elastic telescopic belt is arranged at the upper end of the joint filling shell, and two ends of the telescopic belt are fixedly connected with the supporting plate respectively.
2. The wall repair device according to claim 1, wherein a positioning groove is formed in the middle of the upper end of the support plate, a first electric push rod is symmetrically disposed in the positioning groove, a mounting plate is fixedly connected to the telescopic end of the first electric push rod, a through groove communicated with the positioning groove is formed in the middle of the support rod, a straight rod is slidably disposed in the through groove, the upper end of the straight rod is fixedly connected to the mounting plate, side grooves communicated with the through groove are symmetrically formed around the support rod, a right-angle rod is slidably disposed in each side groove, a plurality of positioning holes are annularly formed in the rotating platform, one end of each right-angle rod is fixedly connected to the straight rod, and the other end of each right-angle rod is clamped with one of the positioning holes.
3. The wall repair device of claim 2, wherein a buffer spring is fixed between the lower end of the straight rod and the bottom of the through groove.
4. The wall repair apparatus of claim 1, wherein the rotating platform has a circular groove, the lower end of the support rod extends into the circular groove, and the extending end of the support rod is fixedly connected with a limiting plate.
5. The wall repair device of claim 2, wherein the lower end of the caulking housing is provided with a connecting groove and a fixing groove from top to bottom, the fixing groove is provided with a wedge-shaped block in the middle, the upper end of the mounting plate is provided with a sliding rod, the sliding rod is symmetrically provided with two rod sleeves, the upper ends of the two rod sleeves are fixedly connected with the tensioning plate, and the upper ends of the two tensioning plates are fixedly connected with the fixing plate.
6. The wall repair apparatus of claim 5, wherein said wedge block has an isosceles triangle cross-section, and two of said fixing plates are attached to each other near the ends.
7. The wall repair apparatus of claim 5, wherein a tightening spring is fixed between the two tension plates.
8. The wall repair apparatus of claim 5, wherein the connecting groove and the fixing groove are curved in cross section, and the arc length of the fixing groove is greater than the arc length of the connecting groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210079424.6A CN114352065B (en) | 2022-01-24 | 2022-01-24 | Wall repairing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210079424.6A CN114352065B (en) | 2022-01-24 | 2022-01-24 | Wall repairing device |
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| Publication Number | Publication Date |
|---|---|
| CN114352065A true CN114352065A (en) | 2022-04-15 |
| CN114352065B CN114352065B (en) | 2023-09-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210079424.6A Active CN114352065B (en) | 2022-01-24 | 2022-01-24 | Wall repairing device |
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| Country | Link |
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| CN (1) | CN114352065B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114837131A (en) * | 2022-06-01 | 2022-08-02 | 黄华日 | Flood control dam repairing device and method for flood control hydraulic engineering |
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| CN215443245U (en) * | 2021-04-02 | 2022-01-07 | 中能雨稷(辽宁)建设工程有限公司 | Building crack repairing device |
| CN215430007U (en) * | 2021-08-05 | 2022-01-07 | 重庆天旗实业有限公司 | Standard waterproof sealant spraying tool |
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2022
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2012193516A (en) * | 2011-03-15 | 2012-10-11 | Shimizu Corp | Liquid injection jig |
| WO2017073148A1 (en) * | 2015-10-29 | 2017-05-04 | 株式会社 栄組 | Device for repairing crack in wall |
| CN208844957U (en) * | 2018-08-13 | 2019-05-10 | 中建八局第一建设有限公司 | A kind of construction metope drilling repair apparatus |
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| CN109779288A (en) * | 2019-03-07 | 2019-05-21 | 薛炜熙 | Device is filled up in a kind of metope gap |
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| CN215430007U (en) * | 2021-08-05 | 2022-01-07 | 重庆天旗实业有限公司 | Standard waterproof sealant spraying tool |
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| CN114837131A (en) * | 2022-06-01 | 2022-08-02 | 黄华日 | Flood control dam repairing device and method for flood control hydraulic engineering |
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| Publication number | Publication date |
|---|---|
| CN114352065B (en) | 2023-09-22 |
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