CN109353933A - A flipping mechanism for maintenance and repair of standard boat joints - Google Patents
A flipping mechanism for maintenance and repair of standard boat joints Download PDFInfo
- Publication number
- CN109353933A CN109353933A CN201811540997.4A CN201811540997A CN109353933A CN 109353933 A CN109353933 A CN 109353933A CN 201811540997 A CN201811540997 A CN 201811540997A CN 109353933 A CN109353933 A CN 109353933A
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- China
- Prior art keywords
- plate
- standard boat
- steel plate
- boat section
- suspender belt
- 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.)
- Pending
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- 238000012423 maintenance Methods 0.000 title claims abstract description 17
- 230000007246 mechanism Effects 0.000 title claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 87
- 239000010959 steel Substances 0.000 claims abstract description 87
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 9
- 230000007306 turnover Effects 0.000 claims description 16
- 238000009434 installation Methods 0.000 claims description 5
- 239000003351 stiffener Substances 0.000 claims description 5
- 230000008719 thickening Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 3
- 238000005096 rolling process Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 2
- 241001522296 Erithacus rubecula Species 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- VIKNJXKGJWUCNN-XGXHKTLJSA-N norethisterone Chemical compound O=C1CC[C@@H]2[C@H]3CC[C@](C)([C@](CC4)(O)C#C)[C@@H]4[C@@H]3CCC2=C1 VIKNJXKGJWUCNN-XGXHKTLJSA-N 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C5/00—Base supporting structures with legs
- B66C5/02—Fixed or travelling bridges or gantries, i.e. elongated structures of inverted L or of inverted U shape or tripods
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
Landscapes
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
本发明涉及铁路桥梁施工设施领域，特别公开了一种用于标准舟节维修保养作业的翻转机构。它包括行走式桁吊上悬挂的两个钢板吊带，钢板吊带安装立式电机减速机，电机减速机的主动齿轮啮合连接从动齿轮，从动齿轮固定在圆钢转轴上，圆钢转轴安装在钢板吊带的下端，圆钢转轴的一端固定安装法兰板，法兰板上有与标准舟节配套连接的连接装置。本发明各个部件将法兰板和标准舟节连成一体，在电机减速机的带动下，实现标准舟节的翻转，从而将原先的贴地滚动法改成现在的悬空翻转法，这种做法有利于人员安全作业和设备安全操作，符合起重作业标准化的规范要求，工作效率也很高。
The invention relates to the field of railway bridge construction facilities, and particularly discloses a turning mechanism used for the maintenance and repair of standard boat joints. It includes two steel slings suspended on the walking truss crane, the steel sling is installed with a vertical motor reducer, the driving gear of the motor reducer is meshed with the driven gear, the driven gear is fixed on the round steel shaft, and the round steel shaft is installed in The lower end of the steel plate sling and one end of the round steel shaft are fixedly installed with a flange plate, and the flange plate is provided with a connecting device that is matched with the standard boat joint. The various components of the present invention connect the flange plate and the standard boat joint into one body, and under the drive of the motor reducer, the standard boat joint can be turned over, so that the original rolling method on the ground is changed to the current floating turning method. It is conducive to the safe operation of personnel and equipment, and meets the standard requirements of lifting operations, and the work efficiency is also very high.
Description
Technical field
It is the present invention relates to railroad bridge construction installation field, in particular to a kind of to maintain operation for standard boat section
Turnover mechanism.
Background technique
Currently, standard boat section (buoyancy tank) proportion is very big in six or seven formula railway float bridges equipment, deposit quantity reaches hundreds of
A, training for preparedness against war in every year task is completed and what construction terminated to withdraw requires routinely to be maintained.Standard boat section
For a cube welding parameters calculated structure, outer surface is the steel plate of 6mm, and outer profile size is 9m × 2.7m × 1.65m, single weight
Measure about 4.65t.Carry out standard boat section maintenance when, finish top exposed face derusting mopping maintenance after, need into
Row entirety 180 degree overturning, maintains bottom surface again upward, after whole maintenance, overturning makes top surface upward again.
For a long time, everybody is got used to being hung using purlin or truck crane lifts when standard boat section overturns operation
It is overturn, that is, take wirerope to reveal all the details mode that binding, oblique pull drag firmly, the self weight by standard boat section makes it in lifting process
In voluntarily overturn, this is a kind of " roller " inverted pattern, and in operation process, there are serious inclined pull hoistings and wirerope to grind
Phenomenon is damaged, huge moment impact load is also brought to lifting appliance.This way had both been unfavorable for personnel safety operation and equipment
Safety operation, does not meet the standardized code requirement of hoisting operation yet, and working efficiency is also extremely low.
Summary of the invention
It is safely and efficiently maintained for standard boat section in order to compensate for the shortcomings of the prior art, the present invention provides a kind of
The turnover mechanism of operation.
The present invention is achieved through the following technical solutions:
A kind of turnover mechanism for the maintenance operation of standard boat section, including walking purlin are hung, and the walking purlin hangs on peace
Two free-moving electric blocks of energy are filled, it is characterized in that: the electric block passes through steel wire hang steel plate suspender belt, the steel
Vertical machine speed reducer is installed, the output end of the motor reducer installs driving gear, and the driving gear is nibbled on plate suspender belt
Connection driven gear is closed, the driven gear is fixed in round steel shaft, and the round steel shaft is mounted on steel plate by bearing and hangs
Flange plate is fixedly mounted in one end of the lower end of band, the round steel shaft, and the flanged plate and motor reducer are respectively in steel plate and hang
The two sides of band；Flanged plate upper end two sides have pin hole, and flanged plate lower end two sides are respectively equipped with and standard boat section
On the matched convex block of the third fourth hook and concave block.
The side that the round steel shaft is located at motor reducer is equipped with positioning pin.
The two sides of the steel plate suspender belt lower end are respectively equipped with suspender belt stiffening plate；The motor reducer passes through flange ribs
Plate and speed reducer flanged plate are mounted in steel plate suspender belt.
The driven gear is fixedly connected with axle sleeve, and the axle sleeve is fixed driven gear and round steel shaft by positioning bolt
Together.
Flanged plate lower end two sides are respectively equipped with horizontal steel plate, and the convex block and concave block are separately positioned on two blocks of water
On plain plate.
It is equipped between the flanged plate and horizontal steel plate and erects stiffener plate.
The bearing is ball roller bearing, and the bearing both ends are respectively equipped with outside end-plate and inside end-plate.
Gasket is equipped between the round steel shaft and inside end-plate.
It is equipped in the pin hole position of the flanged plate and thickeies steel plate, the thickening steel plate is located at back to the one of steel plate suspender belt
Side.
The flanged plate is equipped with the circle flange deep floor radially distributed around round steel shaft.
The beneficial effects of the present invention are:
Steel plate suspender belt, flanged plate, concave block and the convex block that the present invention is arranged first lift standard boat section, so that flanged plate
It is integrally formed with standard boat section, then under the drive of motor reducer, by the transmission of driving gear and driven gear, by justifying
Rotating steel shaft drive flanged plate rotation, to drive standard boat section to overturn, so that original patch ground rolling method is changed to present hang
Somersault robin, this way are conducive to personnel safety operation and equipment safety operation, meet the standardized specification of hoisting operation and want
It asks, working efficiency is also very high.
Detailed description of the invention
The present invention will be further described below with reference to the drawings.
Fig. 1 is the schematic view of the front view in use of the present invention；
Fig. 2 is the right side structural representation in use of the present invention；
Fig. 3 is the separate structure enlarged drawing in Fig. 1 at A；
Fig. 4 is the local right side structural representation in Fig. 1 at A；
Fig. 5 is the schematic cross-sectional view of round steel shaft and steel plate suspender belt coupling part；
Fig. 6 is the schematic cross-sectional view in Fig. 3 at B；
Fig. 7 is the left view structural representation of flanged plate in Fig. 3；
Fig. 8 is the attachment structure schematic diagram of concave block and the third fourth hook；
Fig. 9 is the schematic view of the front view of Fig. 8 drop centre type block；
Figure 10 is the left view structural representation of Fig. 9 drop centre type block；
Figure 11 is the overlooking structure diagram of Fig. 9 drop centre type block；
Figure 12 is the attachment structure schematic diagram of convex block and another the third fourth hook；
Figure 13 is the schematic view of the front view of convex block in Figure 12；
Figure 14 is the left view structural representation of convex block in Figure 13；
Figure 15 is the overlooking structure diagram of convex block in Figure 13.
In figure, 1 standard boat section, 2 walking purlins are hung, 3 electric blocks, 4 wirerope, 5 third fourth hooks, 6 steel plate suspender belts, 7 flanges
Support rib, 8 speed reducer flanged plates, 9 motor reducers, 10 driving gears, 11 driven gears, 12 suspender belt stiffening plates, 13 bearings,
14 round steel shafts, 15 outside end-plates, 16 inside end-plates, 17 gaskets, 18 flanged plates, 19 thicken steel plate, 20 flange ribs
Plate, 21 positioning pins, 22 axle sleeves, 23 positioning bolts, 24 pin holes, 25 bolts, 26 horizontal steel plates, 27 erect stiffener plate, 28 convexs
Block, 29 concave blocks, 30 turnbuckle holes.
Specific embodiment
Attached drawing is specific embodiments of the present invention.As shown in Fig. 1 to Figure 15, the present invention is directed standard boat section 1, standard
There are two the third fourth hooks 5 respectively at the both ends of boat section 1, the two 5 shapes of the third fourth hook are different, and in addition there are also two above the third fourth hook 5
A turnbuckle hole 30.This kind maintains the turnover mechanism of operation for standard boat section 1, including walking purlin hangs 2, is walking
The installation free-moving electric block 3 of two energy on 2 is hung in formula purlin, and each electric block 3 hangs steel plate suspender belt 6 by wirerope 4,
Steel plate suspender belt 6 is rectangular strip up and down, 1685 millimeters long, 370 millimeters wide, 20 millimeters of thickness, Method for Installation in steel plate suspender belt 6
Blue support rib 7 is normally at the middle part of steel plate suspender belt 6 position on the lower side, then installs deceleration again in flange support rib 7
Machine flanged plate 8, flange support rib 7 is vertical with steel plate suspender belt 6, and speed reducer flanged plate 8 is then parallel with steel plate suspender belt 6, is subtracting
Vertical machine speed reducer 9 is installed, motor reducer 9 is the general name of motor and speed reducer, they are assemblied in one on fast machine flanged plate 8
It rises, one is driving device, and one is speed change gear, and driving gear 10, driving tooth is fixedly mounted in the output end of motor reducer 9
Wheel 10 is between steel plate suspender belt 6 and speed reducer flanged plate 8；Distinguish the two sides of steel plate suspender belt 6 below flange support rib 7
Welding one piece of suspender belt stiffening plate 12 of installation, suspender belt stiffening plate 12 are also cut by 20 millimeters of thickness of steel plate, 350 milli of diameter
Rice, drills in two pieces of suspender belt stiffening plates 12 and the steel plate suspender belt 6 being clipped between two pieces of suspender belt stiffening plates 12, in this Kong Shangtong
It crosses bearing 13 and a round steel shaft 14 is installed, the diameter of round steel shaft 14 is 80 millimeters, and bearing 13 is ball roller bearing, in axis
Outside end-plate 15 and inside end-plate 16 is respectively welded in the both ends for holding 13, and on the outside on end-plate 15 and inside end-plate 16
Drilling, wherein the hole on the end-plate 16 of inside is larger than hole on outside end-plate 15, because in the hole of inner end sealing plate 16
Interior that round steel shaft 14 is only in gasket 17 there are also one piece of gasket 17, round steel shaft 14 welds one piece of flanged plate after passing through gasket 17
18, flanged plate 18 is cut by 20 millimeters of thickness of steel plate, and outer dimension is 2150 millimeters × 1664 millimeters, wherein rectangle
Partial Height be 150 millimeters, the height of inverted trapezoidal is 1514 millimeters, weld eight pieces of flange deep floors 20 on flanged plate 18,
This eight pieces of flange deep floors 20 are radially distributed around round steel shaft 14, and flange deep floor 20 is also by 20 millimeters of thickness
Steel plate is cut, and outer dimension is 60 millimeters × 400 millimeters；One is opened in the round steel shaft 14 outside end-plate 15 on the outside
Positioning pin 21 is installed in hole in hole, and positioning pin 21 rests firmly against flanged plate 18 and steel plate suspender belt 6 and bearing 13 together, circle
Rotating steel shaft 14 cannot do axial displacement；The engagement of driving gear 10 connects driven gear 11, welds axle sleeve 22 on driven gear 11,
22 sets of axle sleeve make axle sleeve 22 and round steel shaft 14 be fixed together in round steel shaft 14, and through positioning bolt 23, thus
Driven gear 11 is mounted in round steel shaft 14；The shape of flanged plate 18 be the rectangle of top one, a following inverted trapezoidal,
The pad of flanged plate 18 and round steel shaft 14 is located at cornerwise intersection point some positions on the upper side of flanged plate 18, and diagonal line refers to
Be line between the lower right corner, the rectangular upper right corner and the lower left corner of inverted trapezoidal in the rectangular upper left corner and inverted trapezoidal,
Either more than the center of gravity of standard boat section 1, after in a word being lifted standard boat section 1 with steel plate suspender belt 6, standard boat section 1 is not automatic
Subject to overturning, one block of thickening steel plate 19 is respectively welded in 18 upper end two sides of flanged plate, thickeies steel plate 19 and is located at back to steel plate suspender belt 6
Side, with a thickness of 51 millimeters, diameter is 200 millimeters, is provided with a pin hole 24, and a mating bolt at steel plate 19 thickening
25, the two pin holes 24 are corresponding with two turnbuckle holes 30 on standard boat section 1 respectively, 18 lower end two sides of flanged plate welding one
Block horizontal steel plate 26, horizontal steel plate 26 are located at back to the side of steel plate suspender belt 6, and one piece of setting stiffener plate is welded on level board
27, it erects stiffener plate 27 and is equally welded on flanged plate 18, be respectively welded on horizontal steel plate 26 on one and standard boat section 1
The matched convex block 28 of the third fourth hook 5 and concave block 29, the concrete shape of convex block 28 and concave block 29 see Fig. 8-15.
The course of work is as follows: starting electric block 3 first lifts by crane two steel plate suspender belts 6 respectively, and then 2 rows are hung in walking purlin
The surface for going to standard boat section 1 stops, 3 off the hook of electric block make flanged plate 18 close to and slightly lower than 1 end of standard boat section
Panel is ensuring that convex block 28 on flanged plate 18 and concave block 29 coincide with the upper and lower with 5 position of the third fourth hook on standard boat section 1
Afterwards, it slowly hooks up, it is ensured that the two is fully engaged against, and bolt 25 is inserted into pin hole 24, keeps flanged plate 18 and standard boat section 1 multi-faceted solid
It is scheduled on together, two electric blocks 3 lift by crane simultaneously, so that standard boat section 1 leaves the rear stopping in 1 meter or so of ground, starting motor subtracts
Fast machine 9, driving gear 10 drive driven gear 11 to rotate synchronously, due to driven gear 11, round steel shaft 14, flanged plate 18 at this time
Have become one with standard boat section 1, so standard boat section 1 also and then rotates at this time, until overturning to bottom surface upward, at this time again
Standard boat section 1 is put in secondary starting electric block 3, off the hook well, pulls up bolt 25, by the third fourth hook 5 and concave block 29 and convex block 28
Separation extracts flanged plate 18, is ready for the overturning of next standard boat section 1, and so circulation is repeatedly, in need up to completing institute
The standard boat section 1 of turn-over.
In addition to the technical characteristic described in the specification, remaining technical characteristic is technology known to those skilled in the art.
Claims (10)
1. a kind of turnover mechanism for the maintenance operation of standard boat section, including walking purlin are hung (2), the walking purlin is hung
(2) two free-moving electric blocks of energy (3) are installed, it is characterized in that: the electric block (3) is outstanding by wirerope (4) on
It hangs steel plate suspender belt (6), vertical machine speed reducer (9) is installed on the steel plate suspender belt (6), the output of the motor reducer (9)
End installation driving gear (10), driving gear (10) engagement connection driven gear (11), the driven gear (11) are fixed
On round steel shaft (14), the round steel shaft (14) is mounted on the lower end of steel plate suspender belt (6), the round steel by bearing (13)
Flange plate (18) are fixedly mounted in one end of shaft (14), and the flanged plate (18) and motor reducer (9) are respectively in steel plate suspender belt
(6) two sides；Flanged plate (18) the upper end two sides have pin hole (24), and flanged plate (18) the lower end two sides are set respectively
Have on standard boat section (1) the matched convex block (28) of the third fourth hook (5) and concave block (29).
2. the turnover mechanism according to claim 1 for the maintenance operation of standard boat section, characterized in that the round steel
The side that shaft (14) is located at motor reducer (9) is equipped with positioning pin (21).
3. the turnover mechanism according to claim 1 for the maintenance operation of standard boat section, characterized in that the steel plate
The two sides of suspender belt (6) lower end are respectively equipped with suspender belt stiffening plate (12)；The motor reducer (9) passes through flange support rib (20)
It is mounted on steel plate suspender belt (6) with speed reducer flanged plate (8).
4. the turnover mechanism according to claim 1 for the maintenance operation of standard boat section, characterized in that described driven
Gear (11) is fixedly connected axle sleeve (22), and the axle sleeve (22) passes through positioning bolt (23) for driven gear (11) and round steel shaft
(14) it is fixed together.
5. the turnover mechanism according to claim 1 for the maintenance operation of standard boat section, characterized in that the flange
Plate (18) lower end two sides are respectively equipped with horizontal steel plate (26), and the convex block (28) and concave block (29) are separately positioned on two blocks of water
On plain plate (26).
6. the turnover mechanism according to claim 5 for the maintenance operation of standard boat section, characterized in that the flange
It is equipped between plate (18) and horizontal steel plate (26) and erects stiffener plate (27).
7. the turnover mechanism according to claim 1 for the maintenance operation of standard boat section, characterized in that the bearing
It (13) is ball roller bearing, bearing (13) both ends are respectively equipped with outside end-plate (15) and inside end-plate (16).
8. the turnover mechanism according to claim 7 for the maintenance operation of standard boat section, characterized in that the round steel
Gasket (17) are equipped between shaft (14) and inside end-plate (16).
9. the turnover mechanism according to claim 1 for the maintenance operation of standard boat section, characterized in that in the method
Pin hole (24) position of blue plate (18), which is equipped with, thickeies steel plate (19), and thickening steel plate (19) is located at back to steel plate suspender belt (6)
Side.
10. the turnover mechanism according to claim 1 for the maintenance operation of standard boat section, characterized in that the method
Blue plate (18) is equipped with the circle flange deep floor (20) radially distributed around round steel shaft (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811540997.4A CN109353933A (en) | 2018-12-17 | 2018-12-17 | A flipping mechanism for maintenance and repair of standard boat joints |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811540997.4A CN109353933A (en) | 2018-12-17 | 2018-12-17 | A flipping mechanism for maintenance and repair of standard boat joints |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109353933A true CN109353933A (en) | 2019-02-19 |
Family
ID=65329088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811540997.4A Pending CN109353933A (en) | 2018-12-17 | 2018-12-17 | A flipping mechanism for maintenance and repair of standard boat joints |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109353933A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112520656A (en) * | 2020-11-01 | 2021-03-19 | 邵建森 | Military pontoon bridge maintenance turnover mechanism and application method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030044710A (en) * | 2001-11-30 | 2003-06-09 | 주식회사 포스코 | Apparatus for automatic change of charge plate |
| CN201212006Y (en) * | 2008-05-30 | 2009-03-25 | 郑州大方桥梁机械有限公司 | Gantry crane ring type turning over device adapted to shipbuilding |
| CN202967915U (en) * | 2012-12-27 | 2013-06-05 | 廊坊海斯建材机械有限公司 | Sleeper die hydraulic flip transportation device |
| CN204096587U (en) * | 2014-09-16 | 2015-01-14 | 江西制氧机有限公司 | A kind of tank container turning device |
| CN206747555U (en) * | 2017-06-08 | 2017-12-15 | 山东亿和机械装备有限公司 | Evaporative pattern flow coater apparatus is used in one kind casting |
| CN209242500U (en) * | 2018-12-17 | 2019-08-13 | 铁道战备舟桥处 | A kind of turnover mechanism for the maintenance operation of standard boat section |
-
2018
- 2018-12-17 CN CN201811540997.4A patent/CN109353933A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030044710A (en) * | 2001-11-30 | 2003-06-09 | 주식회사 포스코 | Apparatus for automatic change of charge plate |
| CN201212006Y (en) * | 2008-05-30 | 2009-03-25 | 郑州大方桥梁机械有限公司 | Gantry crane ring type turning over device adapted to shipbuilding |
| CN202967915U (en) * | 2012-12-27 | 2013-06-05 | 廊坊海斯建材机械有限公司 | Sleeper die hydraulic flip transportation device |
| CN204096587U (en) * | 2014-09-16 | 2015-01-14 | 江西制氧机有限公司 | A kind of tank container turning device |
| CN206747555U (en) * | 2017-06-08 | 2017-12-15 | 山东亿和机械装备有限公司 | Evaporative pattern flow coater apparatus is used in one kind casting |
| CN209242500U (en) * | 2018-12-17 | 2019-08-13 | 铁道战备舟桥处 | A kind of turnover mechanism for the maintenance operation of standard boat section |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112520656A (en) * | 2020-11-01 | 2021-03-19 | 邵建森 | Military pontoon bridge maintenance turnover mechanism and application method thereof |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190219 |
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