CN109944174B - Bridge maintenance is with consolidating operating means - Google Patents

Bridge maintenance is with consolidating operating means Download PDF

Info

Publication number
CN109944174B
CN109944174B CN201910358516.6A CN201910358516A CN109944174B CN 109944174 B CN109944174 B CN 109944174B CN 201910358516 A CN201910358516 A CN 201910358516A CN 109944174 B CN109944174 B CN 109944174B
Authority
CN
China
Prior art keywords
reinforcing
fixedly connected
bridge maintenance
lifting frame
bridge
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.)
Active
Application number
CN201910358516.6A
Other languages
Chinese (zh)
Other versions
CN109944174A (en
Inventor
康明旭
杨志勇
曹素月
李雪健
陈来发
朱舒轩
李云云
陈程
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xiamen Holsin Engineering Technology Co ltd
Original Assignee
Xiamen Holsin Engineering Technology Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Xiamen Holsin Engineering Technology Co ltd filed Critical Xiamen Holsin Engineering Technology Co ltd
Priority to CN201910358516.6A priority Critical patent/CN109944174B/en
Publication of CN109944174A publication Critical patent/CN109944174A/en
Application granted granted Critical
Publication of CN109944174B publication Critical patent/CN109944174B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Abstract

The invention relates to the technical field of bridges, in particular to a reinforcing operation device for bridge maintenance, which comprises a base, a first telescopic mechanism and a lifting frame, wherein the upper surface of the base is fixedly connected with the first telescopic mechanism, the top end of the first telescopic mechanism is fixedly connected with the lifting frame, a bidirectional screw rod is arranged in the lifting frame, an upper slide block and a lower slide block are sleeved on the bidirectional screw rod, an upper reinforcing device is arranged on the side wall of the upper slide block, a lower reinforcing device is arranged on the side wall of the lower slide block, a plurality of telescopic supporting rods are uniformly distributed on the upper surface of the lower reinforcing device, a bridge support is fixed by arranging the upper reinforcing device and the lower reinforcing device, the effect of reinforcing the bridge support is achieved, the stability of the bridge support is further improved, the supporting effect is good, the stability is strong, and the safety is further improved, the stirring plate is used for stirring the grouting resin glue, so that the grouting resin glue is turned over up and down in the material injection box to prevent the generation of sediment.

Description

Bridge maintenance is with consolidating operating means
Technical Field
The invention relates to the technical field of bridges, in particular to a reinforcing operation device for bridge maintenance.
Background
The bridge is generally a structure which is erected on rivers, lakes and seas and allows vehicles, pedestrians and the like to smoothly pass through. In order to adapt to the modern high-speed developed traffic industry, bridges are also extended to be constructed to span mountain stream, unfavorable geology or meet other traffic needs, so that the buildings are convenient to pass. The bridge generally comprises an upper structure, a lower structure, a support and an auxiliary structure, wherein the upper structure is also called a bridge span structure and is a main structure for spanning obstacles; the lower structure comprises a bridge abutment, a bridge pier and a foundation; the support is a force transmission device arranged at the supporting positions of the bridge span structure and the bridge pier or the bridge abutment; the auxiliary structures refer to bridge end butt straps, tapered revetments, diversion works and the like.
The bridge plays huge effect in urban internal traffic system, and bridge buildings such as overpass, pedestrian overpass are very common, nevertheless after long-term the use, the bridge pillar crackle easily, and intensity reduces, need consolidate the bridge pillar, and grout the crackle, and current bridge maintenance reinforcing apparatus reinforcing effect is not good enough, and the resin cement that is in the milk produces the sediment easily.
Disclosure of Invention
The invention aims to provide a reinforcing operation device for bridge maintenance, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a bridge maintenance is with consolidating operating means, includes base, first telescopic machanism and crane, the first telescopic machanism of last fixed surface of base, the top fixedly connected with crane of first telescopic machanism, the internally mounted of crane has two-way lead screw, the cover is equipped with the slider of going up on the two-way lead screw, lower slider, reinforcing apparatus is installed to the lateral wall of slider of going up, reinforcing apparatus down is installed to the lateral wall of slider down, lower reinforcing apparatus's upper surface evenly distributed has a plurality of flexible bracing pieces, the top and the last reinforcing apparatus butt of flexible bracing piece.
Further: the lower surface of the base is provided with universal wheels.
Further: the first telescopic mechanism is an electric hydraulic telescopic cylinder.
Further: the upper sliding block and the lower sliding block are respectively in threaded connection with the two-way screw rod, and the upper sliding block and the lower sliding block are respectively in sliding connection with the side wall of the lifting frame.
Further: the lateral wall fixedly connected with adjusting motor of crane, the mid-mounting of two-way lead screw has first gear train, and adjusting motor's axle is stretched the end and is connected with two-way lead screw through first gear train, and adjusting motor is positive and negative motor.
Further: go up reinforcing apparatus and include left mount, right mount, bolt assembly, left mount, right mount bilateral symmetry set up, are connected through bolt assembly between left mount, the right mount, and lower reinforcing apparatus is the same with last reinforcing apparatus structure.
Further: the upper surface fixedly connected with of base notes workbin, the internally mounted of notes workbin has the driving shaft, and both ends rotate with the lateral wall of notes workbin respectively about the driving shaft to be connected, and the lateral wall fixedly connected with agitator motor of notes workbin, agitator motor's axle stretch end and driving shaft fixed connection, and the surface distribution of driving shaft has the stirring board.
Further: the bottom fixedly connected with pump of notes workbin, the top fixedly connected with mount of crane rotates on the mount and is connected with the spray gun, and the feed inlet of spray gun passes through flexible hose and pumps the intercommunication, and the top of crane articulates there is the second telescopic machanism, and the top of second telescopic machanism is articulated with the lower surface of spray gun.
Further: the inside of annotating the workbin still is equipped with the driven shaft, and the driven shaft rotates with the bottom of annotating the workbin to be connected, and the top of driven shaft is connected with the driving shaft through the second gear train, and it has the stirring leaf to distribute on the driven shaft.
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects: in the embodiment of the invention, the upper reinforcing device and the lower reinforcing device are arranged to fix the bridge strut to play a role in reinforcing the bridge strut, the telescopic support rods are used for reinforcing and supporting, the stability of the bridge strut is further improved, the supporting effect is good, the stability is strong, the safety is further improved, the grouting resin adhesive in the grouting box is conveyed to the spray gun by the pump and sprayed in the gap on the surface of the bridge strut to achieve the purpose of repairing the gap, the stirring plate is used for stirring the grouting resin adhesive to enable the grouting resin adhesive to turn up and down in the grouting box to prevent the generation of sediment, the stirring blade is used for stirring the grouting resin adhesive at the bottom layer, the grouting resin adhesive is further prevented from generating sediment, and the problems that the existing bridge maintenance equipment is poor in supporting effect on the bridge strut and the grouting resin adhesive is easy to generate sediment are solved.
Drawings
FIG. 1 is a schematic structural view of an embodiment 1 of a reinforcing operation device for bridge maintenance;
FIG. 2 is a plan view of an upper reinforcing apparatus in an embodiment 1 of the reinforcing operation apparatus for bridge maintenance;
FIG. 3 is a schematic structural view of a grouting box in the embodiment 1 of the reinforcing operation device for bridge maintenance;
fig. 4 is a perspective view of an upper reinforcement device in embodiment 1 of the reinforcement handling device for bridge maintenance.
The reference numerals in the schematic drawings illustrate: 1-a base; 2-universal wheels; 3-a first telescoping mechanism; 4, lifting the rack; 5-a bidirectional screw rod; 6-adjusting the motor; 7-a first gear set; 8, an upper sliding block; 9-lower slide block; 10-upper reinforcing device; 11-a telescopic support bar; 12-lower reinforcement means; 13-material injection box; 14-a stirring motor; 15-driving shaft; 16-stirring plate; 17-a driven shaft; 18-stirring blade; 19-a second gear set; 20-pumping; 21-a spray gun; 22-a holder; 23-a flexible hose; 24-a second telescoping mechanism; 101-left fixed mount; 102-right fixed mount; 103-bolt assembly.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments of the present invention, belong to the protection scope of the present invention, and the present invention is further described with reference to the embodiments below.
Example 1
Referring to fig. 1-4, in the embodiment of the invention, a reinforcing operation device for bridge maintenance comprises a base 1, a first telescopic mechanism 3 and a lifting frame 4, wherein a universal wheel 2 is mounted on the lower surface of the base 1 to facilitate the movement of the device, the first telescopic mechanism 3 is fixedly connected to the upper surface of the base 1, the first telescopic mechanism 3 is an electric hydraulic telescopic cylinder, the lifting frame 4 is fixedly connected to the top end of the first telescopic mechanism 3 to control the first telescopic mechanism 3 to stretch and retract, the lifting frame 4 can be driven to move up and down, the height of the lifting frame 4 is adjusted, a bidirectional screw rod 5 is arranged inside the lifting frame 4, the upper end and the lower end of the bidirectional screw rod 5 are respectively rotatably connected with the lifting frame 4, an upper slide block 8 and a lower slide block 9 are sleeved on the bidirectional screw rod 5, the upper slide block 8 and the lower slide block 9 are respectively in threaded connection with the bidirectional screw rod 5, the, the upper sliding block 8, the lower sliding block 9 is arranged in an up-and-down symmetrical manner, the upper reinforcing device 10 is installed on the side wall of the upper sliding block 8, the lower reinforcing device 12 is installed on the side wall of the lower sliding block 9, the side wall of the lifting frame 4 is fixedly connected with the adjusting motor 6, the first gear set 7 is installed in the middle of the bidirectional screw rod 5, the shaft extension end of the adjusting motor 6 is connected with the bidirectional screw rod 5 through the first gear set 7, the adjusting motor 6 is a forward and reverse rotating motor, the adjusting motor 6 is controlled to rotate forward and reverse, the bidirectional screw rod 5 is driven to rotate forward and reverse, the upper sliding block 8 is driven, the lower sliding block 9 moves in opposite directions or moves back and forth, the upper sliding block 8 is adjusted, the distance between the.
The lower reinforcing device 12 has the same structure as the upper reinforcing device 10, the upper reinforcing device 10 comprises a left fixing frame 101, a right fixing frame 102 and a bolt assembly 103, the left fixing frame 101 and the right fixing frame 102 are arranged in bilateral symmetry, the left fixing frame 101 and the right fixing frame 102 are connected through the bolt assembly 103, the left fixing frame 101 and the right fixing frame 102 are buckled on a bridge strut needing to be maintained, the left fixing frame 101 and the right fixing frame 102 are locked through the bolt assembly 103, the left fixing frame 101 and the right fixing frame 102 are tightly attached to the bridge strut and kept fixed to play a role in reinforcing the bridge strut, a plurality of telescopic supporting rods 11 are uniformly distributed on the upper surface of the lower reinforcing device 12, the telescopic supporting rods 11 are electric hydraulic telescopic cylinders and control the telescopic supporting rods 11 to extend, the top ends of the telescopic supporting rods 11 are abutted to the upper reinforcing device 10, and the telescopic supporting rods, the stability of the bridge strut is improved.
The upper surface of the base 1 is fixedly connected with a material injection box 13, the material injection box 13 is used for storing grouting resin glue, a driving shaft 15 is arranged inside the material injection box 13, the left end and the right end of the driving shaft 15 are respectively connected with the side wall of the material injection box 13 in a rotating manner, the outer side wall of the material injection box 13 is fixedly connected with a stirring motor 14, the shaft extension end of the stirring motor 14 is fixedly connected with the driving shaft 15, a stirring plate 16 is distributed on the surface of the driving shaft 15, the driving shaft 15 is driven to rotate when the stirring motor 14 operates, and then the stirring plate 16 is driven to rotate, the grouting resin glue is stirred by the stirring plate 16 and is enabled to turn up and down in the material injection box 13 to prevent the generation of precipitation, the bottom of the material injection box 13 is fixedly connected with a suction pump 20, the top of the lifting frame 4 is fixedly connected with a fixing frame 22, the fixing frame 22 is rotatably connected with a spray gun 21, the feed inlet of the, spout in the gap on bridge pillar surface, reach the purpose of repairing the gap, the top of crane 4 articulates there is second telescopic machanism 24, and second telescopic machanism 24 is electronic hydraulic telescoping cylinder, and the top of second telescopic machanism 24 is articulated with the lower surface of spray gun 21, and control second telescopic machanism 24 is flexible, can drive spray gun 21 and rotate, adjusts the spray angle of spray gun 21.
Example 2
On embodiment 1's basis, annotate the inside of workbin 13 and still be equipped with driven shaft 17, driven shaft 17 rotates with the bottom of annotating workbin 13 and is connected, the top of driven shaft 17 is connected with driving shaft 15 through second gear train 19, it has stirring leaf 18 to distribute on the driven shaft 17, stirring motor 14 moves the driving shaft 15 and rotates, and then drives driven shaft 17 through second gear train 19 and rotate, thereby drive stirring leaf 18 and rotate, utilize stirring leaf 18 to stir the grout resin adhesive of bottom, further prevent that the grout resin adhesive from producing and deposiing.
With reference to the embodiment 1 and the embodiment 2, the working principle of the invention is as follows: controlling the extension of the first telescopic mechanism 3, driving the crane 4 to move upwards, lifting the crane 4 to the position to be repaired of the bridge pillar, fixing the upper reinforcing device 10 and the lower reinforcing device 12 on the bridge pillar, closely fitting with the bridge pillar, keeping fixed, playing a role of reinforcing the bridge pillar, controlling the extension of the telescopic supporting rod 11, abutting the top end of the telescopic supporting rod 11 against the upper reinforcing device 10, playing a role of reinforcing and supporting by using the telescopic supporting rod 11, improving the stability of the bridge pillar, conveying grouting resin glue in the grouting box 13 to the spray gun 21 by using the suction pump 20, spraying into a gap on the surface of the bridge pillar to repair the gap, starting the stirring motor 14, driving the driving shaft 15 to rotate, further driving the stirring plate 16 to rotate, stirring the resin glue by using the stirring plate 16, making the resin glue turn up and down in the grouting box 13, preventing the generation of precipitation, when the driving shaft 15 rotates, the driven shaft 17 is driven to rotate through the second gear set 19, so that the stirring blade 18 is driven to rotate, the stirring blade 18 is utilized to stir the grouting resin adhesive on the bottom layer, and the grouting resin adhesive is further prevented from precipitating.
It should be particularly noted that base 1, first telescopic machanism 3, crane 4 are prior art's application in this application, go up reinforcing apparatus 10, lower reinforcing apparatus 12, flexible bracing piece 11, have agitating unit's notes feed cylinder 13 and be the innovation point of this application, and it has effectively solved the problem that current bridge maintenance equipment is poor to the support effect of bridge pillar, grouting resin glues and produces the sediment easily.
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (8)

1. A reinforcing operation device for bridge maintenance comprises a base (1), a first telescopic mechanism (3) and a lifting frame (4), and is characterized in that the upper surface of the base (1) is fixedly connected with the first telescopic mechanism (3), the top end of the first telescopic mechanism (3) is fixedly connected with the lifting frame (4), a bidirectional screw rod (5) is installed inside the lifting frame (4), an upper slide block (8) and a lower slide block (9) are sleeved on the bidirectional screw rod (5), an upper reinforcing device (10) is installed on the side wall of the upper slide block (8), a lower reinforcing device (12) is installed on the side wall of the lower slide block (9), the upper reinforcing device (10) comprises a left fixing frame (101), a right fixing frame (102) and a bolt assembly (103), the left fixing frame (101) and the right fixing frame (102) are arranged in a bilateral symmetry manner, and the left fixing frame (101) and the right fixing frame (102) are connected, the lower reinforcing device (12) is identical to the upper reinforcing device (10) in structure, a plurality of telescopic supporting rods (11) are uniformly distributed on the upper surface of the lower reinforcing device (12), and the top ends of the telescopic supporting rods (11) are abutted to the upper reinforcing device (10).
2. The reinforcement handling device for bridge maintenance according to claim 1, wherein universal wheels (2) are mounted to the lower surface of the base (1).
3. The reinforcement handling device for bridge maintenance according to claim 2, wherein the first telescoping mechanism (3) is an electro-hydraulic telescoping cylinder.
4. The reinforcing operation device for bridge maintenance according to claim 1, wherein the upper slider (8) and the lower slider (9) are respectively in threaded connection with the bidirectional screw rod (5), and the upper slider (8) and the lower slider (9) are respectively in sliding connection with the side wall of the lifting frame (4).
5. The reinforcing operation device for bridge maintenance according to claim 1, wherein the side wall of the lifting frame (4) is fixedly connected with an adjusting motor (6), the middle part of the bidirectional screw rod (5) is provided with a first gear set (7), the shaft extension end of the adjusting motor (6) is connected with the bidirectional screw rod (5) through the first gear set (7), and the adjusting motor (6) is a forward and reverse rotating motor.
6. The bridge maintenance reinforcement operation device according to any one of claims 1 to 5, wherein a material injection box (13) is fixedly connected to the upper surface of the base (1), a driving shaft (15) is installed inside the material injection box (13), the left end and the right end of the driving shaft (15) are respectively rotatably connected with the side wall of the material injection box (13), a stirring motor (14) is fixedly connected to the outer side wall of the material injection box (13), the shaft extension end of the stirring motor (14) is fixedly connected with the driving shaft (15), and stirring plates (16) are distributed on the surface of the driving shaft (15).
7. The bridge maintenance reinforcement operation device according to claim 6, wherein a suction pump (20) is fixedly connected to the bottom of the injection box (13), a fixed frame (22) is fixedly connected to the top of the lifting frame (4), a spray gun (21) is rotatably connected to the fixed frame (22), a feed inlet of the spray gun (21) is communicated with the suction pump (20) through a telescopic hose (23), a second telescopic mechanism (24) is hinged to the top of the lifting frame (4), and the top end of the second telescopic mechanism (24) is hinged to the lower surface of the spray gun (21).
8. The reinforcing operation device for bridge maintenance according to claim 6, characterized in that the inside of the material injection box (13) is further provided with a driven shaft (17), the driven shaft (17) is rotatably connected with the bottom of the material injection box (13), the top end of the driven shaft (17) is connected with the driving shaft (15) through a second gear set (19), and stirring blades (18) are distributed on the driven shaft (17).
CN201910358516.6A 2019-04-30 2019-04-30 Bridge maintenance is with consolidating operating means Active CN109944174B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910358516.6A CN109944174B (en) 2019-04-30 2019-04-30 Bridge maintenance is with consolidating operating means

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910358516.6A CN109944174B (en) 2019-04-30 2019-04-30 Bridge maintenance is with consolidating operating means

Publications (2)

Publication Number Publication Date
CN109944174A CN109944174A (en) 2019-06-28
CN109944174B true CN109944174B (en) 2020-07-17

Family

ID=67016788

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910358516.6A Active CN109944174B (en) 2019-04-30 2019-04-30 Bridge maintenance is with consolidating operating means

Country Status (1)

Country Link
CN (1) CN109944174B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110409323A (en) * 2019-08-08 2019-11-05 驻马店市达远路桥勘察设计院 A kind of bridge maintaining reinforcing operating device

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090100476A (en) * 2008-03-20 2009-09-24 구일건설(주) A bridge lifting apparatus and bridge lifting method using the same
CN204435927U (en) * 2014-12-24 2015-07-01 山东省建筑科学研究院 A kind of Strengthening by Steel-Packing post pre-applied force device
JP2017089134A (en) * 2015-11-04 2017-05-25 Jfe建材株式会社 Cutoff method and water cutoff wall structure
CN107419664A (en) * 2017-05-30 2017-12-01 林再颐 A kind of Support bracket structure of bridge construction
CN207314170U (en) * 2017-05-27 2018-05-04 北京市市政专业设计院股份公司 A kind of beam body jacking apparatus
CN108797383A (en) * 2018-06-13 2018-11-13 刘玲玲 A kind of bridge pier surface automatic processing equipment and its process of surface treatment
CN109162214A (en) * 2018-10-29 2019-01-08 郭弘 A kind of method of bridge strengthening

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090100476A (en) * 2008-03-20 2009-09-24 구일건설(주) A bridge lifting apparatus and bridge lifting method using the same
CN204435927U (en) * 2014-12-24 2015-07-01 山东省建筑科学研究院 A kind of Strengthening by Steel-Packing post pre-applied force device
JP2017089134A (en) * 2015-11-04 2017-05-25 Jfe建材株式会社 Cutoff method and water cutoff wall structure
CN207314170U (en) * 2017-05-27 2018-05-04 北京市市政专业设计院股份公司 A kind of beam body jacking apparatus
CN107419664A (en) * 2017-05-30 2017-12-01 林再颐 A kind of Support bracket structure of bridge construction
CN108797383A (en) * 2018-06-13 2018-11-13 刘玲玲 A kind of bridge pier surface automatic processing equipment and its process of surface treatment
CN109162214A (en) * 2018-10-29 2019-01-08 郭弘 A kind of method of bridge strengthening

Also Published As

Publication number Publication date
CN109944174A (en) 2019-06-28

Similar Documents

Publication Publication Date Title
CN203199912U (en) Folding gantry crane
CN109112932A (en) A kind of asphalt paving device for building
CN108425309A (en) A kind of highway maintenance road surface prosthetic device
CN111851290B (en) Geotechnical bridge railing concrete pouring device capable of shifting in four directions
CN207987912U (en) A kind of synchronous cutting casting concrete continuous walls construction equipment
CN109944174B (en) Bridge maintenance is with consolidating operating means
CN113121264B (en) Self-walking concrete curing vehicle for tunnel
CN101660357A (en) Machinery for installing light partition battens
CN109944155A (en) A kind of Transportable type workbench for Bridge repair and reinforcement
CN201521111U (en) Cast-in-situ bridge concrete spreader
CN209206761U (en) A kind of numerical control doorframe cutting special plane
CN207891915U (en) Piping lane wall rapid construction device
CN207194826U (en) Underground horizontal drilling machine
CN111591937B (en) Hoisting device for road and bridge
CN209469456U (en) A kind of tunnel ditch template
CN108271553A (en) A kind of river slope surface deadwood tendril automation trimmer
CN211448706U (en) Guniting equipment for tunnel construction
CN203529349U (en) Pull-type adhesive tape machine
CN208777659U (en) A kind of three tire evener of double telescopic
CN113062226B (en) Double-sided maintenance equipment for overhead bridge concrete
CN112681751A (en) Multifunctional efficient concrete pouring device
CN207240430U (en) The vibrating forming machine of base of high-speed railway plate construction
CN218053196U (en) Curing means is used in pouring of T-shaped roof beam
CN216663750U (en) Highway maintenance road surface cementation of fissures device
CN113062227B (en) Viaduct concrete curing means

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant