CN220013396U - Combined double-cantilever bridge deck crane - Google Patents
Combined double-cantilever bridge deck crane Download PDFInfo
- Publication number
- CN220013396U CN220013396U CN202321358083.2U CN202321358083U CN220013396U CN 220013396 U CN220013396 U CN 220013396U CN 202321358083 U CN202321358083 U CN 202321358083U CN 220013396 U CN220013396 U CN 220013396U
- Authority
- CN
- China
- Prior art keywords
- truss
- truss structure
- deck crane
- bridge deck
- trusses
- 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
Links
- 238000004873 anchoring Methods 0.000 claims abstract description 22
- 230000007246 mechanism Effects 0.000 claims abstract description 18
- 230000008859 change Effects 0.000 claims description 8
- 238000004378 air conditioning Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 7
- 210000001015 abdomen Anatomy 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Landscapes
- Leg Units, Guards, And Driving Tracks Of Cranes (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The utility model discloses a combined double-cantilever bridge deck crane which comprises a truss structure, a lifting system, a walking device and an anchoring device. The truss structure comprises two groups of truss units and cross beams which are detachably connected with the two groups of truss units, wherein the truss units comprise first trusses and second trusses which are identical in structure and are in parallelogram, and the first trusses and the second trusses are detachably connected and symmetrically distributed about the central line of the truss units. The lifting system comprises a lifting mechanism and a lifting appliance, wherein the lifting mechanism is slidably arranged at the top end of the truss structure, and the lifting appliance is connected with the lifting mechanism. The walking device is used for driving the truss structure to move on the beam section, and the anchoring device is used for anchoring the truss structure on the beam section. Above-mentioned two cantilever bridge floor loop wheel machines of combination formula can compromise two sets of different operating modes, can reduce the input of equipment, saves construction cost.
Description
Technical Field
The utility model relates to the technical field of bridge construction, in particular to a combined double-cantilever bridge deck crane.
Background
The construction of the superstructure of the large-span continuous beam bridge is often carried out in a symmetrical suspension splicing mode, and a bridge deck crane is often adopted at the moment. When the bridge has the condition of feeding beams at the two sides of the bridge, a single cantilever bridge deck crane is usually adopted, the beams need to be fed from the lower sides (side spans and middle spans) of the bridge, and bridge beam sections are respectively lifted from the corresponding installation positions of the lower sides of the middle spans and the side spans of the bridge and directly installed to the bridge deck.
When only one side of the bridge has the beam feeding condition and the other side does not have the beam feeding condition, if the bridge deck crane is adopted for construction, the double-cantilever bridge deck crane with special design is required to be adopted, and the side without the beam feeding condition under the bridge can be fed from the bridge. The specific process is as follows:
the bridge Liang Duancong middle span is lifted under the bridge, then is lifted to the bridge deck, the beam Duan Xuanzhuai degrees passes through the body belly of the bridge deck crane, is placed on a beam transporting vehicle, is transported to the side span through the beam transporting vehicle, is lifted by the side span bridge deck crane, passes through the body belly of the bridge deck crane, passes through the beam Duan Xuanzhuai degrees, and finally is installed.
Due to the existence of the two working conditions, corresponding single-cantilever or double-cantilever bridge deck cranes are required to be respectively configured according to specific construction working conditions, and the design of the existing bridge deck crane is difficult to meet the two working conditions of one crane.
Disclosure of Invention
Based on the above, it is necessary to provide a combined double-cantilever bridge deck crane aiming at the above problems, which can give consideration to the above two working conditions and reduce equipment investment.
A modular double cantilever bridge deck crane comprising:
the truss structure comprises two groups of truss units and cross beams which are detachably connected with the two groups of truss units, wherein the truss units comprise first trusses and second trusses which are identical in structure and are in parallelogram, and the first trusses and the second trusses are detachably connected and symmetrically distributed about the central line of the truss units;
the lifting system comprises a lifting mechanism and a lifting appliance, wherein the lifting mechanism is slidably arranged at the top end of the truss structure, and the lifting appliance is connected with the lifting mechanism;
the walking device is used for driving the truss structure to move on the beam section; a kind of electronic device with high-pressure air-conditioning system
And anchoring means for anchoring the truss structure to the beam section.
In one embodiment, the truss unit further comprises a middle stringer connecting the top ends of the first truss and the second truss.
In one embodiment, the first truss and the second truss each include an upper longitudinal beam, a first oblique beam, a lower longitudinal beam and a second oblique beam, the upper longitudinal beam, the first oblique beam, the lower longitudinal beam and the second oblique beam are sequentially connected to form a parallelogram structure, and the middle longitudinal beam is connected with two groups of upper longitudinal beams.
In one embodiment, the first truss and the second truss share the bottom girder, the truss unit is further provided with a bottom girder matched with the bottom girder, the bottom girder is connected with the bottom girder through a vertical rod, and the anchoring device is mounted on the bottom girder.
In one embodiment, the spreader has a fixed portion connected to the hoisting mechanism and a swivel portion rotatable relative to the fixed portion to enable the beam section to swivel through the web of the truss structure.
In one embodiment, the walking device comprises a track beam, a change gear and a pushing device, the track Liang Bu is arranged on the beam section, the change gear is arranged on the truss structure, one end of the pushing device is arranged on the track beam, the other end of the pushing device is connected with the truss structure, and the truss structure is driven to slide by the telescopic driving of the pushing device along the track beam.
In one embodiment, the pushing device comprises a mounting seat, a jack and a connecting frame, wherein the mounting seat is mounted on the track beam, the connecting frame is mounted on the truss structure, and two ends of the jack are hinged with the mounting seat and the connecting frame respectively.
In one embodiment, the anchoring device comprises a bearing frame, an anchor rod and a fixing frame, wherein the bearing frame is installed on the truss structure, the fixing frame is connected with the beam section, and the anchor rod is anchored with the bearing frame and the fixing frame.
In one embodiment, the system further comprises a jacking device mounted to the bottom of the truss structure for jacking the truss structure to tension the anchoring device.
In one embodiment, the roof supporting device comprises a supporting seat and a screw rod, wherein the screw rod is connected to the truss structure in a threaded manner, and the supporting seat is connected with the screw rod and used for being supported on the beam section.
Above-mentioned combination formula double cantilever bridge floor crane, truss unit includes that the structure is the same and is parallelogram's first truss and second truss, first truss and second truss can dismantle the connection to about truss unit's central line symmetric distribution, consequently can split into two single cantilever bridge floor cranes with double cantilever bridge floor crane, first truss is the truss of first single cantilever bridge floor crane, second truss is the truss of second single cantilever bridge floor crane, two single cantilever bridge floor cranes adopt former double cantilever bridge floor crane's walking device and anchor, only need add one set of lifting system can. Above-mentioned two cantilever bridge floor loop wheel machines of combination formula can compromise two sets of different operating modes, can reduce the input of equipment, saves construction cost.
Drawings
In order to more clearly illustrate the embodiments of the present utility model, the drawings that are required to be used in the embodiments will be briefly described. Throughout the drawings, the elements or portions are not necessarily drawn to actual scale.
FIG. 1 is a schematic diagram of a combined double cantilever bridge deck crane in one embodiment;
FIG. 2 is a side view of the modular double cantilever bridge deck crane of FIG. 1;
FIG. 3 is an enlarged view of a portion of FIG. 1 at A;
FIG. 4 is a partial enlarged view at B in FIG. 2;
FIG. 5 is a schematic illustration of a first single cantilever bridge deck crane disassembled from a combined double cantilever bridge deck crane;
fig. 6 is a schematic illustration of a second single cantilever bridge deck crane detached from the combined double cantilever bridge deck crane.
Reference numerals:
1-beam section, 10-truss structure, 11-truss unit, 12-beam, 13-first truss, 14-second truss, 15-center line, 161-upper longitudinal beam, 162-first oblique beam, 163-lower longitudinal beam, 164-second oblique beam, 165-lower longitudinal beam, 166-vertical bar, 17-middle longitudinal beam, 18-support bar, 20-lifting system, 22-lifting mechanism, 24-lifting appliance, 30-walking device, 31-track beam, 32-change gear, 33-pushing device, 331-mounting seat, 332-jack, 333-connecting frame, 40-anchoring device, 41-bearing frame, 42-anchor bar, 43-fixing frame, 50-supporting device, 51-supporting seat, 52-screw.
Detailed Description
In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit or scope of the utility model, which is therefore not limited to the specific embodiments disclosed below.
It will be understood that when an element is referred to as being "fixed 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 are used herein for illustrative purposes only and are not meant to be the only 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 utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
Referring to fig. 1 and 2, a combined double-cantilever bridge deck crane in an embodiment includes a truss structure 10, a lifting system 20, a walking device 30 and an anchor device 40.
The truss structure 10 comprises two groups of truss units 11 and cross beams 12, wherein the cross beams 12 connect the two groups of truss units 11, the cross beams 12 are provided with two groups, and the two groups of cross beams 12 are respectively connected with the upper end and the lower end of the truss units 11 so as to form a space for the girder segment 1 to pass through the abdomen of the truss structure 10.
Truss unit 11 includes first truss 13 and second truss 14, the first truss 13 and second truss 14 being identical in structure and size, and both first truss 13 and second truss 14 being parallelogram structures for interchangeability. The first truss 13 and the second truss 14 are detachably connected, and the first truss 13 and the second truss 14 are symmetrically distributed about a center line 15 of the truss unit 11.
When the combined double-cantilever bridge deck crane is split into two single-cantilever bridge deck cranes, the first trusses 13 of the two truss units 11 can be used as trusses of the first single-cantilever bridge deck crane, and the second trusses 14 of the two truss units 11 can be used as trusses of the second single-cantilever bridge deck crane.
In an embodiment, the first truss 13 and the second truss 14 each include an upper girder 161, a first oblique girder 162, a lower girder 163, and a second oblique girder 164, and the upper girder 161, the first oblique girder 162, the lower girder 163, and the second oblique girder 164 are sequentially connected to form a parallelogram structure.
Further, the first truss 13 and the second truss 14 share a side sill 163, and the truss unit 11 further includes a side sill 165 mated with the side sill 163, and the side sill 163 is connected to the side sill 165 by a vertical bar 166. When the combined double-cantilever bridge deck crane is split into two single-cantilever bridge deck cranes, since there is only one side sill 163, one of the single-cantilever bridge deck cranes does not have the side sill 163, and the side sill 165 can be used as the side sill 163.
In an embodiment, the truss unit 11 further includes an intermediate girder 17, where the intermediate girder 17 connects the top ends of the first truss 13 and the second truss 14 to connect the first truss 13 and the second truss 14 as a unit, so as to ensure the strength of the assembled truss structure 10. Specifically, the two ends of the intermediate side member 17 are connected to two upper side members 161, respectively. The first truss 13 and the second truss 14 further include supporting bars 18, and the supporting bars 18 connect the upper side member 161 and the lower side member 162, so that the strength of the combined truss unit 11 is ensured. Nodes may be used to connect the rods together when more than three rods are connected within truss unit 11.
The lifting system 20 comprises a lifting mechanism 22 and a lifting appliance 24, wherein the lifting mechanism 22 is slidably arranged at the top end of the truss structure 10, the lifting appliance 24 is connected with the lifting mechanism 22, and the lifting appliance 24 is used for lifting the girder segment 1 to the bridge deck.
In one embodiment, the lifting mechanism 22 may be an overhead crane, and the lifting mechanism 22 may also be a hoist. The spreader 24 has a fixed portion connected to the hoisting mechanism 22 and a turning portion that rotates relative to the fixed portion, the turning portion lifting the beam section 1 so that the spreader 24 has a turning function, and the beam section 1 is rotated 90 degrees during lifting so that the beam section 1 passes through the abdomen of the truss structure 10.
Referring also to fig. 3, the walking device 30 is used to drive the truss structure 10 to move over the beam section 1. In one embodiment, the walking device 30 includes a track beam 31, a change gear 32, and a pushing device 33. Track beams 31 are arranged on the beam sections 1 and change gears 32 are mounted on the truss structure 10. Specifically, the change gear 32 is mounted on the vertical bar 166. The change gear 32 can roll on the track beam 31 to drive the whole truss structure 10 to move. One end of the pushing device 33 is arranged on the track beam 31, the other end of the pushing device 33 is connected with the truss structure 10, and the telescopic driving truss structure 10 of the pushing device 33 slides along the track beam 31.
Further, the pushing device 33 includes a mounting base 331, a jack 332 and a connecting frame 333. The mount 331 is mounted to the rail beam 31 and the connector 333 is mounted to the truss structure 10. Specifically, the connecting frame 333 is mounted on the vertical rod 166. The two ends of the jack 332 are respectively hinged with the mounting seat and the connecting frame 333, and the whole truss structure 10 can be driven to slide on the track beam 31 through the expansion and contraction of the jack 332, so that the bridge deck crane can move above the mounted beam section 1, and the next beam section 1 can be conveniently mounted.
In an embodiment, the number of the track beams 31 is two, the number of the thrusters 33 is four, the two track beams 31 are respectively arranged corresponding to the two truss units 11, and the two thrusters 33 are arranged on each track beam 31, and the two thrusters 33 are respectively arranged at the front end and the rear end of the truss units 11. When the combined double-cantilever bridge deck crane is split into two single-cantilever bridge deck cranes, each single-cantilever bridge deck crane adopts two track beams 31 and two thrusters 33, namely, a track beam 31 and a set of thrusters 33 are respectively arranged on the left and right sides of the truss.
The anchoring device 40 is used for anchoring the truss structure 10 on the beam section 1, and because the combined double-cantilever bridge deck crane needs to be hoisted on two cantilevers, the four fulcrum positions at the bottom of the truss structure 10 all need to be designed with the anchoring device 40, so that the stability of the bridge deck crane is ensured.
Referring to fig. 4, in one embodiment, the anchoring device 40 includes a carrier 41, an anchor rod 42 and a fixing frame 43. The carrier 41 is mounted to the truss structure 10. Specifically, the carrier 41 is mounted on the bottom rail 166. The fixing frame 43 is mounted on the beam section 1, and the anchor rods 42 are anchored with the carrier 41 and the fixing frame 43. Specifically, the two ends of the anchor rod 42 respectively pass through the bearing frame 41 and the fixing frame 43 and then are locked and fixed through nuts, so that the anchor rod is anchored with the bearing frame 41 and the fixing frame 43.
Referring to fig. 2 and 4, in one embodiment, the combined double-cantilever bridge deck crane further includes a supporting device 50, where the supporting device 50 is installed at the bottom of the truss structure 10, and is used to lift the truss structure 10 to tension the anchoring device 40. Wherein the number of the supporting devices 50 is the same as the number of the anchoring devices 40, and four supporting devices 50 are respectively arranged at four anchoring devices 40.
Further, the supporting device 50 includes a supporting seat 51 and a screw 52, and the screw 52 is screwed on the truss structure 10. Specifically, the screw 52 is screwed to the aforementioned carrier 41. The support seats 51 are connected to the threaded rods 52 and serve to support the beam section 1.
Wherein, single cantilever bridge floor crane is different from the anchorage mode of propping up of double cantilever bridge floor crane, and single cantilever bridge floor crane front fulcrum adopts prop up 50 tops of device, and the back fulcrum adopts anchor 40 anchor. For a double cantilever bridge deck crane, both the front and rear fulcra are provided with both the roof support device 50 and the anchor device 40.
Referring to fig. 1, 5 and 6, the above-mentioned method for splitting the combined double-cantilever bridge deck crane into two single-cantilever bridge deck cranes specifically comprises:
the first truss 13 is used as the truss of the first single cantilever bridge deck crane, and two crossbeams 12 are connected with two first trusses 13. The two sets of track beams 31 cooperate with the two sets of pushing devices 33 to drive the truss to move, the two sets of supporting devices 50 are arranged on the front supporting point of the truss, the two sets of anchoring devices 40 are anchored on the rear supporting point of the truss, and the lifting system 20 is arranged on the truss.
The second truss 14 is used as the truss for the second single cantilever bridge deck crane, with the side sill 165 being used as the side sill 163 for the second truss 14. The two sets of track beams 31 cooperate with the two sets of pushing devices 33 to drive the truss to move, the two sets of supporting devices 50 are arranged on the front supporting point of the truss, and the two sets of anchoring devices 40 are anchored on the rear supporting point of the truss. In the splitting process, two newly added cross beams 12 are required to be connected with the second truss 14, the newly added track beams 31 are used for walking, and a newly added set of lifting systems 20 are installed on the trusses.
Above-mentioned combination formula double cantilever bridge floor loop wheel machine, a double cantilever bridge floor loop wheel machine can be converted into two single cantilever bridge floor loop wheel machines through disassembling. Similarly, two single-cantilever bridge deck cranes can be converted into a double-cantilever bridge deck crane by combination. The combined double-cantilever bridge deck crane can give consideration to two groups of different working conditions, can reduce the investment of equipment and saves the construction cost.
The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model, and are intended to be included within the scope of the appended claims and description.
Claims (10)
1. A modular double cantilever bridge deck crane, comprising:
the truss structure comprises two groups of truss units and cross beams which are detachably connected with the two groups of truss units, wherein the truss units comprise first trusses and second trusses which are identical in structure and are in parallelogram, and the first trusses and the second trusses are detachably connected and symmetrically distributed about the central line of the truss units;
the lifting system comprises a lifting mechanism and a lifting appliance, wherein the lifting mechanism is slidably arranged at the top end of the truss structure, and the lifting appliance is connected with the lifting mechanism;
the walking device is used for driving the truss structure to move on the beam section; a kind of electronic device with high-pressure air-conditioning system
And anchoring means for anchoring the truss structure to the beam section.
2. The modular double cantilever deck crane according to claim 1, wherein the truss unit further comprises a middle stringer connecting the top ends of the first and second trusses.
3. The combination double-cantilever bridge deck crane of claim 2, wherein the first truss and the second truss each comprise an upper longitudinal beam, a first oblique beam, a lower longitudinal beam and a second oblique beam, the upper longitudinal beam, the first oblique beam, the lower longitudinal beam and the second oblique beam are sequentially connected to form a parallelogram structure, and the middle longitudinal beam is connected with two groups of upper longitudinal beams.
4. A combined double cantilever bridge deck crane according to claim 3, wherein the first truss and the second truss share the bottom girder, the truss unit is further provided with a bottom girder matched with the bottom girder, the bottom girder is connected with the bottom girder through a vertical rod, and the anchoring device is mounted on the bottom girder.
5. A modular double cantilever deck crane according to claim 1, wherein the spreader has a fixed portion connected to the lifting mechanism and a swivel portion rotatable relative to the fixed portion to enable the beam section to swivel through the web of the truss structure.
6. The combined double-cantilever bridge deck crane of claim 1, wherein the walking device comprises a track beam, a change gear and a pushing device, the track Liang Bu is arranged on the beam section, the change gear is arranged on the truss structure, one end of the pushing device is arranged on the track beam, the other end of the pushing device is connected with the truss structure, and the truss structure is driven to slide by the telescopic driving of the pushing device along the track beam.
7. The combined double-cantilever bridge deck crane according to claim 6, wherein the pushing device comprises a mounting seat, a jack and a connecting frame, the mounting seat is mounted on the track beam, the connecting frame is mounted on the truss structure, and two ends of the jack are hinged with the mounting seat and the connecting frame respectively.
8. The combination double cantilever bridge deck crane of claim 1, wherein the anchoring means comprises a carrier, an anchor bar and a mount, the carrier being mounted on the truss structure, the mount being connected to the beam section, the anchor bar being anchored to the carrier and the mount.
9. The combination double cantilever deck crane of claim 1, further comprising a roof support mounted to the bottom of the truss structure for lifting the truss structure to tension the anchor.
10. The combination double cantilever deck crane of claim 9, wherein the roof support assembly includes a support base and a screw threaded on the truss structure, the support base being connected to the screw and adapted to be supported on the beam section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321358083.2U CN220013396U (en) | 2023-05-31 | 2023-05-31 | Combined double-cantilever bridge deck crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321358083.2U CN220013396U (en) | 2023-05-31 | 2023-05-31 | Combined double-cantilever bridge deck crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220013396U true CN220013396U (en) | 2023-11-14 |
Family
ID=88688366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321358083.2U Active CN220013396U (en) | 2023-05-31 | 2023-05-31 | Combined double-cantilever bridge deck crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220013396U (en) |
-
2023
- 2023-05-31 CN CN202321358083.2U patent/CN220013396U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11634877B2 (en) | Method for removal of temporary support system for road bridge pre-fabricated small box girder-type concealed bent cap, and equipment therefor | |
| CN101462672B (en) | Big elevating capacity and big elevating height hoisting crane | |
| CN208815424U (en) | A kind of bridge descending hanging basket | |
| CN201338911Y (en) | Lifting cane with large lifting capacity and great lifting height | |
| CN220013396U (en) | Combined double-cantilever bridge deck crane | |
| CN112850455A (en) | Assembled multifunctional aerial rotary lifting appliance and construction method | |
| CN110512521B (en) | Butt joint device and butt joint method for large-section steel truss girder | |
| CN216403632U (en) | Split type cable carries loop wheel machine | |
| CN215714692U (en) | Lifting device for construction of cable-stayed bridge | |
| CN212052371U (en) | Hanging basket device for variable width concrete box girder suspension casting construction | |
| CN111532999B (en) | Beam erecting crane and beam erecting method | |
| CN212077660U (en) | Large-span wide width bridge girder rhombus hanging basket construction structure | |
| CN114803877B (en) | Lifting device for extra heavy piece in multi-line centralized layout car dumper factory building | |
| CN219793657U (en) | Large-tonnage segmental assembling bridge girder erection machine end hanger | |
| CN219929352U (en) | Lifting tool joint, suspension connecting mechanism and modularized combined steel box girder bridge deck lifting tool | |
| CN215331381U (en) | Hanging basket for accelerating continuous beam cantilever construction | |
| CN210341665U (en) | Installation device for corrugated steel web of suspension casting bridge | |
| CN112502476B (en) | Steel strand bearing capacity conversion device and using method thereof | |
| CN220673104U (en) | Multidirectional outlet combined frame of 330kV C-type HGIS power distribution device | |
| CN211200095U (en) | Matching structure of support leg and main beam of bridge girder erection machine | |
| CN213508066U (en) | Bridge erecting machine for construction of main span of cable-stayed bridge | |
| CN215946547U (en) | Truss connecting device and truss structure | |
| CN220078407U (en) | Double-column type railway-crossing light portal frame | |
| CN219386006U (en) | Walking type C-shaped hanging frame | |
| CN220133644U (en) | 7-shaped cross-railway light portal frame |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |