CN205775858U - A kind of semi-automatic environmental protection dabbing machine for web outside dabbing - Google Patents
A kind of semi-automatic environmental protection dabbing machine for web outside dabbing Download PDFInfo
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- CN205775858U CN205775858U CN201620468782.6U CN201620468782U CN205775858U CN 205775858 U CN205775858 U CN 205775858U CN 201620468782 U CN201620468782 U CN 201620468782U CN 205775858 U CN205775858 U CN 205775858U
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- dabbing
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- 230000007613 environmental effect Effects 0.000 title claims abstract description 33
- 239000000428 dust Substances 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 239000007787 solid Substances 0.000 claims description 3
- 239000008400 supply water Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 16
- 230000000694 effects Effects 0.000 description 3
- 230000003028 elevating effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000012857 repacking Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Bridges Or Land Bridges (AREA)
Abstract
This utility model provides a kind of semi-automatic environmental protection dabbing machine for web outside dabbing, including: mobile system (10), dabbing work system (20), jacking system (30) and dust falling system (40), this dust falling system (40) is used for the airborne dust produced when reducing dabbing head (21) work.This semi-automatic environmental protection dabbing machine being used for web outside dabbing reduces the condition of automatic dabbing construction and limits, and reduces the dust pollution that construction produces.This semi-automatic environmental protection dabbing machine being used for web outside dabbing also achieves the do mechanization operation of hollow slab girder web dabbing, improve dabbing efficiency, save labour cost, improve dabbing quality simultaneously, automatically the concrete surface of dabbing machine dabbing, dabbing area occupation ratio is up to more than 95%, the whole compliant requirement of the dabbing degree of depth.
Description
Technical field
This utility model relates to a kind of semi-automatic environmental protection dabbing machine for web outside dabbing.
Background technology
Applying hollow slab girder quantity many on bridge, its qualifying point is concrete dabbing quality at hollow slab girder hinge seam
Controlling, according to past construction experiences, in most cases at this, dabbing, simply after removing external mold, uses and manually digs
Hair, often occurs that dabbing area is not enough, and the dabbing degree of depth is the most shallow, and after having poured hinge seam concrete, oozing easily occurs in hinge seam
Leakage phenomenon, has a strong impact on the service life of bridge structure.
Chinese patent CN 204235681 U, on April 1 2015 publication date, discloses one " precast hollow
Outside plate-girder web, concrete surface dabbing is with full-automatic dabbing machine ", pre-cast hollow slab web outside concrete surface dabbing is with complete
Automatically dabbing machine includes one door type framework, is provided with a driving wheel and several rows travelling wheel, driving wheel bottom portal frame
Driven by the actuating unit on portal frame；The inner side of portal frame opposite sides is laterally respectively arranged with one near bottom
Individual walking position-limited wheel；Two dabbing machines it are provided with inside portal frame, and dabbing machine and the elevating mechanism on portal frame
Being connected, elevating mechanism drives dabbing machine to move up and down；Dabbing machine provides power by external air compressor for it；Dabbing machine
Including the dabbing head being positioned in work portion framework, the welding of dabbing head front portion is some in order to control dabbing head and precast hollow slab
The dabbing head location wheel of beam body spacing, dabbing head location wheel outward flange is equal with dabbing cephalic par；Dabbing back of head is successively
Against spring, supporting steel plate and adjusting screw rod, it is adjusted screw rod and pushes or pull on supporting steel plate and spring can make dabbing head
It is in close contact with beam body or departs from.
Pre-cast hollow slab web outside concrete surface dabbing has in the shortcoming used with full-automatic dabbing machine:
1, full-automatic dabbing machine uses portal frame, and two ends carry out dabbing, and the width of hollow slab girder must be consistent, as
Occur that the hollow slab girder of multiple width needs dabbing to construct, then need repacking, cumbersome.Meanwhile, running wheel
In base of frame, therefore the ground residing for hollow slab girder requires smooth, does not possesses as hollow slab girder is in job site etc.
Under conditions of ground grading, it is impossible to carry out automatic dabbing construction.
2, dabbing construction is the concrete having basically reached intensity to be carried out surface cut, while dabbing construction,
Bigger dust pollution can be produced.
Utility model content
In order to solve existing dabbing equipment airborne dust problem in use, this utility model provides a kind of outside web
The semi-automatic environmental protection dabbing machine of side dabbing, this semi-automatic environmental protection dabbing machine being used for web outside dabbing reduces chisel automatically
The condition of hair construction limits, and reduces the dust pollution that construction produces.This is used for the semi-automatic environmental protection chisel of web outside dabbing
Hair machine also achieves the do mechanization operation of hollow slab girder web dabbing, improves dabbing efficiency, has saved labour cost, with
Time improve dabbing quality, the concrete surface of automatic dabbing machine dabbing, dabbing area occupation ratio is up to more than 95%, chisel
The hair degree of depth whole compliant requirement.
This utility model solve its technical problem be the technical scheme is that a kind of for web outside dabbing half from
Rotating ring protects dabbing machine, including:
Mobile system, for moving this semi-automatic environmental protection dabbing machine for web outside dabbing, this mobile system contains
Vehicle body；
Dabbing work system, this dabbing work system contains dabbing head；
Jacking system, is arranged at the side of mobile system, and dabbing head is arranged at the lower end of jacking system, jacking system
Dabbing head can be made to move up and down；
Dust falling system, the airborne dust produced during for reducing the work of dabbing head.
Vehicle body includes back timber and bottom girder, and vehicle body also includes the column between back timber and bottom girder.
Mobile system is possibly together with 4 wheels being positioned at below vehicle body.
Dabbing head is provided with 7 drill bits, 7 drill bits on dabbing head in two vertical setting of types cross-distribution, 7 drill bits
All towards the lower section of vehicle body.
The both sides of dabbing head are provided with is easy to the positioning roller that dabbing head operationally moves.
Vehicle body is welded by channel-section steel.
The horizontal length of back timber is more than the horizontal length of bottom girder, and in the horizontal direction, jacking system is arranged at one end of back timber,
The other end of back timber is provided with for making vehicle body keep the counterweight of balance.
Including crane, screw rod and rotating disk, crane is fixing with one end of back timber to be connected, and screw rod is vertically arranged
In crane, rotating disk is arranged at the upper end of screw rod, and dabbing head is arranged at the lower end of screw rod, when rotating this rotating disk,
Dabbing head can move up and down.
Dust falling system includes bucket and water pipe, and bucket is positioned on vehicle body, and one end of water pipe is connected with bucket, water pipe another
One end is positioned at the lower section of one end of water pipe, and the other end of water pipe can supply water to the dabbing job position of dabbing head.
Dust falling system includes vacuum cleaner and sweep-up pipe, and vacuum cleaner is positioned on vehicle body, and one end of sweep-up pipe is connected with vacuum cleaner,
The other end of sweep-up pipe is positioned at around the dabbing job position of dabbing head.
The beneficial effects of the utility model are: this semi-automatic environmental protection dabbing machine being used for web outside dabbing reduces automatically
The condition of dabbing construction limits, and reduces the dust pollution that construction produces.This is used for the semi-automatic ring of web outside dabbing
Protecting dabbing machine not affected by condition when dabbing is constructed, no matter hollow slab girder width is how many, as long as being in basic horizontal
State can be carried out dabbing construction.This semi-automatic environmental protection dabbing machine being used for web outside dabbing also achieves hollow
The do mechanization operation of plate-girder web dabbing, improves dabbing efficiency, has saved labour cost, improve dabbing matter simultaneously
Amount, the concrete surface of automatic dabbing machine dabbing, dabbing area occupation ratio is up to more than 95%, and the dabbing degree of depth all meets
Code requirement.
Accompanying drawing explanation
The Figure of description of the part constituting the application is used for providing being further appreciated by of the present utility model, this practicality
Novel schematic description and description is used for explaining this utility model, is not intended that improper limit of the present utility model
Fixed.
Fig. 1 is the working state schematic representation of the semi-automatic environmental protection dabbing machine for web outside dabbing.
Fig. 2 is the enlarged diagram at dabbing head position in Fig. 1.
Fig. 3 is the structural representation of dabbing head.
Fig. 4 is the structural representation of the first dust falling system.
Fig. 5 is the structural representation of the second dust falling system.
Reference in figure:
10, mobile system；11, vehicle body；12, back timber；13, bottom girder；14, column；15, wheel；
20, dabbing work system；21, dabbing head；22, drill bit；23, positioning roller；24, air compressor machine；
30, jacking system；31, crane；32, screw rod；33, rotating disk；
40, dust falling system；41, bucket；42, water pipe；43, valve switch；44, vacuum cleaner；45, sweep-up pipe；
50, precast plate girder web.
Detailed description of the invention
It should be noted that in the case of not conflicting, the embodiment in the application and the feature in embodiment can phases
Combination mutually.Describe this utility model below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
A kind of semi-automatic environmental protection dabbing machine for web outside dabbing, including: mobile system 10, is somebody's turn to do for mobile
For the semi-automatic environmental protection dabbing machine of web outside dabbing, this mobile system 10 is containing vehicle body 11；Dabbing work system
20, this dabbing work system 20 is containing dabbing head 21；Jacking system 30, is arranged at the side of mobile system 10,
Dabbing head 21 is arranged at the lower end of jacking system 30, and jacking system 30 can make dabbing head 21 move up and down；
Dust falling system 40, for reducing the airborne dust produced when dabbing head 21 works, as shown in Figure 1.
When carrying out dabbing operation, this semi-automatic environmental protection dabbing machine being used for web outside dabbing is positioned at hollow precoated plate
On web 50, this is used for the semi-automatic environmental protection dabbing machine of web outside dabbing only to hollow precast plate girder web 50
Left surface or right flank carry out dabbing construction operation, as shown in Figure 1.
In the present embodiment, vehicle body 11 includes back timber 12 and bottom girder 13, and vehicle body 11 also includes being positioned at back timber 12 He
Column 14 between bottom girder 13, back timber 12 and bottom girder 13 connect fixing by column 14.Mobile system 10 also contains
There are 4 wheels 15 being positioned at below vehicle body 11.Vehicle body 11 is welded by conventional channel-section steel, 4 wheels 15
Spacing is 70cm, and this spacing can ensure the shear bar both sides flat place that cored slab end face is pre-buried, it is ensured that vehicle body travels rail
Mark is interference-free.
In the present embodiment, this dabbing work system 20 is made up of with air compressor machine 24 dabbing head 21, dabbing head
21 is bridge floor porous dabbing head common in bridge construction, and dabbing head 21 is provided with 22,7,7 drill bits brill
22 on dabbing head 21 in two vertical setting of types cross-distribution, it is ensured that dabbing area occurs without omission, 7 drill bits 22
All towards the lower section of vehicle body 11.The both sides of dabbing head 21 are provided with is easy to what dabbing head 21 operationally moved
Positioning roller 23, as shown in Figure 2.Head both sides arrange positioning roller 23, during dabbing operation, it is simple to slide,
Main can avoiding affects concrete solid quality because the dabbing degree of depth crosses deep.Head is by hose and outside pneumatics
Machine is connected, and provides power for dabbing operation, as shown in Figure 3.
In the present embodiment, the horizontal length of back timber 12 is more than the horizontal length of bottom girder 13, in the horizontal direction, and lifting
System 30 is arranged at the right-hand member of back timber 12, and the left end of back timber 12 is provided with for making vehicle body 11 keep the counterweight of balance
Steel plate.Jacking system 30 includes crane 31, screw rod 32 and rotating disk 33, crane 31 and one end of back timber 12
Fixing connection, screw rod 32 is vertically arranged in crane 31, and rotating disk 33 is arranged at the upper end of screw rod 32,
Dabbing head 21 is arranged at the lower end of screw rod 32, and when rotating this rotating disk 33, screw rod 32 synchronizes to turn with rotating disk 33
Dynamic, dabbing head 21 can only move up and down and not rotate with screw rod 32.Crane 31 uses angle steel to be welded,
Screw rod 32 is made up of Φ 25 screw-thread steel.
In the present embodiment, dust falling system 40 can have two kinds of implementations, and the first is that dust falling system 40 includes water
Bucket 41 and water pipe 42, bucket 41 is positioned on vehicle body 11, and one end of water pipe 42 connects in bucket 41, water pipe 42
The other end be positioned at the lower section of one end of water pipe 42, water pipe 42 is provided with valve switch 43, due to the effect of gravity,
The other end of water pipe 42 can supply water to the dabbing job position of dabbing head 21, the most as shown in Figure 4, and water pipe 42
Opposite side fixing with at head be connected, during dabbing operation, topped up with water in bucket 41, open valve switch 43, really
Water conservation flows to the dabbing job position of beam slab, plays the effect reducing airborne dust.
In the present embodiment, the second is that the embodiment of dust falling system 40 is, as it is shown in figure 5, dust falling system 40
Including vacuum cleaner 44 and sweep-up pipe 45, vacuum cleaner 44 is positioned on vehicle body 11, one end of sweep-up pipe 45 and vacuum cleaner
44 connect, and the other end of sweep-up pipe 45 is positioned at around the dabbing job position of dabbing head 21, such as sweep-up pipe 45
The other end be positioned at the top of dabbing job position of dabbing head 21.During dabbing operation, start vacuum cleaner 44, inhale
The other end of dirt pipe 45 can absorb the solid particulate matter near dabbing job position, plays the effect reducing airborne dust.
The work process of this semi-automatic environmental protection dabbing machine being used for web outside dabbing is to utilize junction steel plate, by dabbing
Head 21 is arranged on the lower end of crane 31, and rotating disk 33 is tightened in setting, during work, air compressor machine 24 drives chisel
Hair head 21 vibrates, and artificial promotion vehicle body 11 slides along beam length direction on precast plate girder web 50 top, makes dabbing
Head 21 is adjacent to closely on concrete surface, after completing one section of dabbing, rotates simultaneously and tightens rotating disk 33, logical
Cross jacking system 30 and adjust the height of dabbing head 21, carry out the operation of next horizontal plane dabbing.
This semi-automatic environmental protection dabbing machine being used for web outside dabbing reduces the condition of automatic dabbing construction and limits, and reduces
The dust pollution that construction produces.This is used for the semi-automatic environmental protection dabbing machine of web outside dabbing when dabbing is constructed not by bar
Part affects, and no matter hollow slab girder width is how many, as long as being in basic horizontal state to can be carried out dabbing construction.This use
Semi-automatic environmental protection dabbing machine in web outside dabbing also achieves the do mechanization operation of hollow slab girder web dabbing, improves
Dabbing efficiency, has saved labour cost, improves dabbing quality simultaneously, the concrete surface of automatic dabbing machine dabbing,
Dabbing area occupation ratio is up to more than 95%, the whole compliant requirement of the dabbing degree of depth.
The above, only specific embodiment of the utility model, it is impossible to limit the scope that utility model is implemented with it,
So the displacement of its equivalent assemblies, or the equivalent variations made according to this utility model scope of patent protection and modification, all answer
Still fall within the category that this patent is contained.It addition, between technical characteristic and technical characteristic in this utility model, technology special
Levy between technical scheme, all can use with independent assortment between technical scheme and technical scheme.
Claims (10)
1. the semi-automatic environmental protection dabbing machine for web outside dabbing, it is characterised in that described outside web
The semi-automatic environmental protection dabbing machine of side dabbing includes:
Mobile system (10), for moving this semi-automatic environmental protection dabbing machine for web outside dabbing, this moves and is
System (10) is containing vehicle body (11)；
Dabbing work system (20), this dabbing work system (20) contains dabbing head (21)；
Jacking system (30), is arranged at the side of mobile system (10), and dabbing head (21) is arranged at lifting system
The lower end of system (30), jacking system (30) can make dabbing head (21) move up and down；
Dust falling system (40), is used for the airborne dust produced when reducing dabbing head (21) work.
Semi-automatic environmental protection dabbing machine for web outside dabbing the most according to claim 1, it is characterised in that
Vehicle body (11) includes back timber (12) and bottom girder (13), and vehicle body (11) also includes being positioned at back timber (12) and bottom girder
(13) column (14) between.
Semi-automatic environmental protection dabbing machine for web outside dabbing the most according to claim 1, it is characterised in that
Mobile system (10) is possibly together with 4 wheels (15) being positioned at vehicle body (11) lower section.
Semi-automatic environmental protection dabbing machine for web outside dabbing the most according to claim 1, it is characterised in that
Dabbing head (21) is provided with 7 drill bits (22), and 7 drill bits (22) are erected in two on dabbing head (21)
Row's cross-distribution, 7 drill bits (22) are all towards the lower section of vehicle body (11).
Semi-automatic environmental protection dabbing machine for web outside dabbing the most according to claim 1, it is characterised in that
The both sides of dabbing head (21) are provided with is easy to the positioning roller (23) that dabbing head (21) operationally moves.
Semi-automatic environmental protection dabbing machine for web outside dabbing the most according to claim 1, it is characterised in that
Vehicle body (11) is welded by channel-section steel.
Semi-automatic environmental protection dabbing machine for web outside dabbing the most according to claim 1, it is characterised in that
The horizontal length of back timber (12) is more than the horizontal length of bottom girder (13), and in the horizontal direction, jacking system (30) sets
Being placed in one end of back timber (12), the other end of back timber (12) is provided with for making vehicle body (11) keep joining of balance
Weight.
Semi-automatic environmental protection dabbing machine for web outside dabbing the most according to claim 7, jacking system (30)
Including crane (31), screw rod (32) and rotating disk (33), crane (31) is solid with one end of back timber (12)
Fixed connection, screw rod (32) is vertically arranged in crane (31), and rotating disk (33) is arranged at screw rod (32)
Upper end, dabbing head (21) is arranged at the lower end of screw rod (32), when rotate this rotating disk (33) time, dabbing machine
Head (21) can move up and down.
Semi-automatic environmental protection dabbing machine for web outside dabbing the most according to claim 1, it is characterised in that
Dust falling system (40) includes bucket (41) and water pipe (42), and bucket (41) is positioned on vehicle body (11), water pipe
(42) one end is connected with bucket (41), and the other end of water pipe (42) is positioned at the lower section of one end of water pipe (42),
The other end of water pipe (42) can supply water to the dabbing job position of dabbing head (21).
Semi-automatic environmental protection dabbing machine for web outside dabbing the most according to claim 1, it is characterised in that
Dust falling system (40) includes vacuum cleaner (44) and sweep-up pipe (45), and vacuum cleaner (44) is positioned on vehicle body (11),
One end of sweep-up pipe (45) is connected with vacuum cleaner (44), and the other end of sweep-up pipe (45) is positioned at dabbing head (21)
Dabbing job position around.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620468782.6U CN205775858U (en) | 2016-05-20 | 2016-05-20 | A kind of semi-automatic environmental protection dabbing machine for web outside dabbing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620468782.6U CN205775858U (en) | 2016-05-20 | 2016-05-20 | A kind of semi-automatic environmental protection dabbing machine for web outside dabbing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205775858U true CN205775858U (en) | 2016-12-07 |
Family
ID=58114438
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620468782.6U Expired - Fee Related CN205775858U (en) | 2016-05-20 | 2016-05-20 | A kind of semi-automatic environmental protection dabbing machine for web outside dabbing |
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| Country | Link |
|---|---|
| CN (1) | CN205775858U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108643051A (en) * | 2018-05-30 | 2018-10-12 | 浙江交工集团股份有限公司 | A kind of steel construction pedestal for the automatic dabbing of prefabricated bent cap |
| CN109025219A (en) * | 2018-07-30 | 2018-12-18 | 长沙市凤英机械科技有限公司 | A kind of efficient terrace dabbing device and its dabbing system |
| CN109098090A (en) * | 2018-08-24 | 2018-12-28 | 中铁三局集团建筑安装工程有限公司 | A kind of box beam anchor recess dabbing device |
| CN109798125A (en) * | 2018-12-29 | 2019-05-24 | 中建三局集团有限公司 | A kind of full-automatic dabbing device and method for tunnel duct piece dabbing |
| CN110181697A (en) * | 2019-06-11 | 2019-08-30 | 中建路桥集团有限公司 | A kind of bridge beam slab top surface dabbing device |
| CN110757664A (en) * | 2019-10-23 | 2020-02-07 | 中建筑港集团有限公司 | Automatic underwater chiseling equipment |
| CN111516115A (en) * | 2020-06-08 | 2020-08-11 | 陈士清 | Hollow slab beam double-side walking type chiseling device |
| CN112832150A (en) * | 2021-01-27 | 2021-05-25 | 中交第三公路工程局有限公司 | Vertical chiseling device for equal-elevation surfaces of culvert channel |
| CN113894952A (en) * | 2021-10-12 | 2022-01-07 | 山东高速集团有限公司创新研究院 | High-precision movable intelligent chiseling device for prefabricated hollow plate beam and using method |
| CN114645513A (en) * | 2022-02-23 | 2022-06-21 | 中国一冶集团有限公司 | Prestressed concrete box girder web roughening machine |
-
2016
- 2016-05-20 CN CN201620468782.6U patent/CN205775858U/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108643051B (en) * | 2018-05-30 | 2023-11-03 | 浙江交工集团股份有限公司 | Steel structure pedestal for automatic roughening of prefabricated bent cap |
| CN108643051A (en) * | 2018-05-30 | 2018-10-12 | 浙江交工集团股份有限公司 | A kind of steel construction pedestal for the automatic dabbing of prefabricated bent cap |
| CN109025219A (en) * | 2018-07-30 | 2018-12-18 | 长沙市凤英机械科技有限公司 | A kind of efficient terrace dabbing device and its dabbing system |
| CN109098090A (en) * | 2018-08-24 | 2018-12-28 | 中铁三局集团建筑安装工程有限公司 | A kind of box beam anchor recess dabbing device |
| CN109798125A (en) * | 2018-12-29 | 2019-05-24 | 中建三局集团有限公司 | A kind of full-automatic dabbing device and method for tunnel duct piece dabbing |
| CN110181697A (en) * | 2019-06-11 | 2019-08-30 | 中建路桥集团有限公司 | A kind of bridge beam slab top surface dabbing device |
| CN110181697B (en) * | 2019-06-11 | 2020-08-21 | 中建路桥集团有限公司 | Bridge beam slab top surface chiseling device |
| CN110757664A (en) * | 2019-10-23 | 2020-02-07 | 中建筑港集团有限公司 | Automatic underwater chiseling equipment |
| CN111516115A (en) * | 2020-06-08 | 2020-08-11 | 陈士清 | Hollow slab beam double-side walking type chiseling device |
| CN112832150B (en) * | 2021-01-27 | 2022-06-24 | 中交第三公路工程局有限公司 | Vertical scabbling device for equal vertical surfaces of culvert channels |
| CN112832150A (en) * | 2021-01-27 | 2021-05-25 | 中交第三公路工程局有限公司 | Vertical chiseling device for equal-elevation surfaces of culvert channel |
| CN113894952A (en) * | 2021-10-12 | 2022-01-07 | 山东高速集团有限公司创新研究院 | High-precision movable intelligent chiseling device for prefabricated hollow plate beam and using method |
| CN114645513A (en) * | 2022-02-23 | 2022-06-21 | 中国一冶集团有限公司 | Prestressed concrete box girder web roughening machine |
| CN114645513B (en) * | 2022-02-23 | 2023-05-16 | 中国一冶集团有限公司 | Prestressed concrete box girder web roughening machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161207 |