CN215217666U - Basket safety monitoring device is hung in construction of continuous rigid frame bridge cantilever - Google Patents
Basket safety monitoring device is hung in construction of continuous rigid frame bridge cantilever Download PDFInfo
- Publication number
- CN215217666U CN215217666U CN202121217828.4U CN202121217828U CN215217666U CN 215217666 U CN215217666 U CN 215217666U CN 202121217828 U CN202121217828 U CN 202121217828U CN 215217666 U CN215217666 U CN 215217666U
- Authority
- CN
- China
- Prior art keywords
- cross beam
- lower cross
- rigid frame
- walking beam
- monitoring device
- 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
Images
Landscapes
- Bridges Or Land Bridges (AREA)
Abstract
The utility model provides a basket safety monitoring device is hung in construction of continuous rigid frame bridge cantilever belongs to safety monitoring technical field. The device comprises a mounting assembly, a walking assembly and a monitoring assembly, wherein an outer die of the mounting assembly is arranged at two ends of a bottom die, an inner die is arranged between the outer dies, a cradle tripod is arranged at two sides of the inner die, a front upper cross beam is fixed on the cradle tripod, a front lower cross beam is fixed on the front upper cross beam, and a rear lower cross beam is fixed on the front lower cross beam; an outer mold walking beam hanger rod of the walking assembly is fixed on the bottom die, an outer mold walking beam hanger rod is fixed on the outer mold walking beam hanger rod, an outer mold walking beam roller is fixed on the outer mold walking beam hanger rod hanger, and an outer mold walking beam is slidably mounted on the outer mold walking beam hanger rod; the first fixing seat of the monitoring assembly is fixed on the front lower cross beam, the strain gauge is fixed between the first fixing seat and the second fixing seat, and the second fixing seat is fixed on the front lower cross beam. The stress and deformation of the component are monitored in real time through the device, and real-time early warning is achieved.
Description
Technical Field
The utility model relates to a safety monitoring technical field, concretely relates to basket safety monitoring device is hung in construction of continuous rigid frame bridge cantilever.
Background
The large-span continuous rigid frame bridge usually adopts a cantilever casting construction method, and the hanging basket is main equipment in cantilever construction, and has the characteristics of light dead weight, convenient disassembly, wide operation surface and the like. The safety of the cradle in the construction process is a key problem related to the overall safety and quality of construction. Most of the existing continuous rigid frame bridge construction methods are to perform a pre-pressing loading test on a hanging basket, judge the reliability and safety of the hanging basket, have certain deviation with actual construction, and cannot completely simulate the working state during the actual construction. The safety of the cradle cannot be continuously monitored in actual construction, safety early warning cannot be carried out when the safety early warning exceeds a limit value, and timely maintenance is not facilitated for constructors so as to guarantee the engineering quality and safety.
Based on the above situation, the utility model provides a basket safety monitoring device is hung in construction of continuous rigid frame bridge cantilever can effectively solve above problem.
SUMMERY OF THE UTILITY MODEL
In order to compensate above not enough, the utility model provides a basket safety monitoring device is hung in construction of continuous rigid frame bridge cantilever aims at improving and can not carry out continuous monitoring to hanging basket security in actual construction at existing equipment, can't carry out safety precaution when exceeding the limit value, is unfavorable for constructor in time to overhaul the problem with guarantee engineering quality and safety.
In order to solve the technical problem, the utility model discloses a following technical scheme realizes:
the utility model provides a basket safety monitoring device is hung in construction of continuous rigid frame bridge cantilever, includes:
the mounting assembly comprises a bottom die, two outer dies, an inner die, two cradle tripods, a front upper cross beam, a front lower cross beam and a rear lower cross beam, wherein the two outer dies are arranged at two ends of the bottom die, the inner die is arranged between the two outer dies, the two cradle tripods are arranged at two sides of the inner die, two ends of the front upper cross beam are respectively and fixedly arranged at one ends of the two cradle tripods, the front lower cross beam is fixedly arranged at the front upper cross beam, the front lower cross beam is arranged at one end of the bottom die, one side of the rear lower cross beam is fixedly arranged at the front lower cross beam, and one side of the rear lower cross beam is arranged at one end, away from the front lower cross beam, of the bottom die;
the walking assembly comprises an outer die walking beam hanger rod, an outer die walking beam hanger rod hanger, an outer die walking beam roller and an outer die walking beam, one end of the outer die walking beam hanger rod is fixedly installed on the bottom die, one end of the outer die walking beam hanger rod hanger is fixedly installed at one end, far away from the bottom die, of the outer die walking beam hanger rod, the outer die walking beam roller is fixedly installed at one end, far away from the outer die walking beam hanger rod, of the outer die walking beam hanger rod, and the outer die walking beam is installed on the outer die walking beam hanger rod in a sliding mode; and
and the monitoring assembly is arranged below the mounting assembly and is used for monitoring the stress and deformation of the component and performing real-time early warning.
As a preferred technical scheme of the utility model, the monitoring subassembly includes first fixing base, foil gage second fixing base, first fixing base fixed mounting in the one end of preceding bottom end rail, the one end fixed mounting of foil gage in one side of first fixing base, one side fixed mounting of second fixing base in the foil gage is kept away from the one end of first fixing base, second fixing base fixed mounting in preceding bottom end rail is kept away from the one end of first fixing base.
As a preferred technical scheme of the utility model, hang basket tripod and include main longitudinal beam, stand and oblique pull band, stand fixed mounting in on the main longitudinal beam, the one end fixed mounting in of pull band to one side in the one end of main longitudinal beam, the other end fixed mounting in of pull band to one side in the stand is kept away from the one end of main longitudinal beam.
As an optimal technical scheme of the utility model, two fixed mounting has the bridging between the string basket tripod.
As a preferred technical scheme of the utility model, fixed mounting has two jacks, two on the preceding entablature jack fixed mounting in the both ends of preceding entablature.
As an optimized technical scheme of the utility model, fixed mounting has chain block on the back bottom end rail, chain block keeps away from the one end fixed mounting of back bottom end rail in the external mold walks on the roof beam.
As an optimal technical scheme of the utility model, fixed mounting has the bottom plate distribution roof beam on the back bottom end rail, the bottom plate distribution roof beam is kept away from back bottom end rail one end fixed mounting in on the preceding bottom end rail.
As an optimal technical scheme of the utility model, the one end fixed mounting of preceding entablature has the suspender, the suspender is kept away from the one end fixed mounting of preceding entablature in on the preceding bottom end rail.
As a preferred technical scheme of the utility model, the one end fixed mounting of main longitudinal beam has back counter-force shoulder pole.
As an optimized technical scheme of the utility model, the stand is kept away from the one end of oblique pull band is provided with stand ball bowl support.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
the utility model discloses a continuous rigid frame bridge cantilever construction cradle safety monitoring device who obtains through above-mentioned design, during the use, when needing whole removal to walk capable subassembly, make the preceding bottom end rail descend to appointed height, use external force to stimulate the external mold and walk the roof beam, because the characteristic of walking the roof beam gyro wheel outside, cause the external mold to walk the roof beam and move forward; when the device is subjected to a preloading test, the problems of strength, rigidity, stability and the like of a device component can be judged through the state of the strain gauge, real-time monitoring is carried out, early warning can be provided for dangerous states, workers can find and solve the problems in time, and the quality and safety of engineering are improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural view of a rear vertical surface of a device provided by an embodiment of the present invention;
fig. 2 is a schematic view of a front vertical surface structure of the device according to the embodiment of the present invention;
fig. 3 is an enlarged view of a portion a of fig. 2 according to the present invention;
fig. 4 is a schematic side elevation structure view of the device according to the embodiment of the present invention;
fig. 5 is a schematic perspective view of a monitoring assembly according to an embodiment of the present invention;
fig. 6 is a schematic plan view of the device according to the embodiment of the present invention.
In the figure: 100-mounting the assembly; 110-bottom die; 120-external mold; 130-an inner mold; 140-cradle tripod; 141-main longitudinal beam; 1411-rear counter force shoulder pole; 142-a column; 1421-column ball bowl support; 143-diagonal draw belts; 144-a scissor-brace; 150-front upper beam; 151-jack; 152-a harness; 160-front lower beam; 170-rear lower beam; 171-chain block; 172-floor distribution beams; 200-a running assembly; 210-outer mold walking beam suspender; 220-outer mold walking beam hanger rod hanging rack; 230-outer mold walking beam roller; 240-outer mold walking beam; 300-a monitoring component; 310-a first holder; 320-strain gauge; 330-second fixed seat.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Examples
Referring to fig. 1, the present invention provides a technical solution: the utility model provides a basket safety monitoring device is hung in construction of continuous rigid frame bridge cantilever, includes installation component 100, walks capable subassembly 200 and monitoring subassembly 300, and installation component 100 fixed mounting realizes the function of fixing and supporting on the construction piece, walks capable subassembly 200 and realizes the translation function of device, and monitoring subassembly 300 realizes the stress and the deformation real-time early warning of monitoring member.
Referring to fig. 1 and 2, the mounting assembly 100 includes a bottom die 110, two outer dies 120, an inner die 130, two cradle tripods 140, a front upper beam 150, a front lower beam 160 and a rear lower beam 170, the two outer dies 120 are disposed at two ends of the bottom die 110, the inner die 130 is disposed between the two outer dies 120, the two cradle tripods 140 are disposed at two sides of the inner die 130, a scissor 144 is fixedly mounted between the two cradle 140 through bolts to prevent distortion due to stress, two ends of the tripod 150 are respectively fixedly mounted at right ends of the two cradle tripods 140 by welding, two jacks 151 are fixedly mounted on the front upper beam 150 through bolts, the two jacks 151 are respectively fixedly mounted at two ends of the front upper beam 150 through bolts, a hanging strip 152 is fixedly mounted on a lower surface of the front upper beam 150 through bolts, a lower end of the hanging strip 152 is fixedly mounted on an upper surface of the front lower beam 160 through bolts, the rear lower cross beam 170 is fixedly provided with a chain block 171, the upper end of the chain block 171 is fixedly arranged on the outer mold walking beam 240 through a bolt, the rear lower cross beam 170 is fixedly provided with a bottom plate distribution beam 172 through welding, the right end of the bottom plate distribution beam 172 is fixedly arranged on the front lower cross beam 160 through welding, and the whole installation and fixation of the equipment are realized through the above devices.
Referring to fig. 2 and 3, the traveling assembly 200 includes an outer mold walking beam hanger 210, an outer mold walking beam hanger 220, an outer mold walking beam roller 230 and an outer mold walking beam 240, an upper end of the outer mold walking beam hanger 210 is fixedly mounted on the bottom mold 110 through a bolt, an upper end of the outer mold walking beam hanger 220 is fixedly mounted at a lower end of the outer mold walking beam hanger 210, the outer mold walking beam roller 230 is fixedly mounted in a lower end of the outer mold walking beam hanger 220 through a rotating shaft, and the outer mold walking beam 240 is slidably mounted on the outer mold walking beam hanger 220, and the above devices can realize a translation function of the equipment.
Referring to fig. 4 and 5, the monitoring assembly 300 includes a first fixing base 310 and a second fixing base 330 of a strain gauge 320, the first fixing base 310 is fixedly mounted on the front lower beam 160 through bolts, the left end of the strain gauge 320 is fixedly mounted on one side of the first fixing base 310 through bolts, the left side of the second fixing base 330 is fixedly mounted on the right end of the strain gauge 320 through bolts, the second fixing base 330 is fixedly mounted on the front lower beam 160 through bolts, during the setting, the strain gauge 320 is tightly attached to the front lower beam 160, the number of the monitoring assemblies 300 is plural, and the monitoring assemblies are respectively disposed at the support points of the bottom plate distribution beam 172, the cradle tripod 140 and the front upper beam 150 and in the middle of the front lower beam 160, the positions are deformation danger positions, the stress and deformation of the real-time monitoring component are realized through the above devices, and the real-time warning is performed to quickly enable the staff to solve the problem.
Referring to fig. 4 and 6, the cradle tripod 140 includes a main longitudinal beam 141, a vertical column 142 and a diagonal cable 143, a rear reaction carrying pole 1411 is fixedly installed at the left end of the main longitudinal beam 141 through a bolt, the vertical column 142 is fixedly installed at the middle of the main longitudinal beam 141 through a bolt, the lower end of the diagonal cable 143 is fixedly installed at the two ends of the main longitudinal beam 141 through welding, the upper end of the diagonal cable 143 is fixedly installed at the upper end of the vertical column 142 through welding, a vertical column bowl support 1421 is arranged at the lower end of the vertical column 142, and when the cradle tripod is specifically installed, the vertical column bowl support 1421 is fixedly installed on a construction block.
Specifically, this basket safety monitoring device is hung in construction of continuous rigid frame bridge cantilever's theory of operation: when the walking assembly 200 needs to be integrally moved, the front lower cross beam 160 is lowered to a specified height, and the outer mold walking beam 240 is pulled by external force, so that the outer mold walking beam 240 moves forwards due to the characteristics of the outer mold walking beam roller 230;
when the device is subjected to a preloading test, the strength, rigidity, stability and other problems of the device component can be judged through the state of the strain gauge 320, real-time monitoring is realized, early warning can be provided for dangerous states, workers can find and solve problems in time, and the quality and safety of engineering are improved.
It should be noted that the specific model specification of the strain gauge 320 needs to be determined by type selection according to the actual specification of the device, and the specific type selection calculation method adopts the prior art in the field, so detailed description is omitted.
The power supply of the strain gauge 320 and its principle will be clear to a person skilled in the art and will not be described in detail here.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a basket safety monitoring device is hung in construction of continuous rigid frame bridge cantilever which characterized in that includes:
the mounting assembly (100) comprises a bottom die (110), two outer dies (120), an inner die (130), two cradle tripods (140), a front upper cross beam (150), a front lower cross beam (160) and a rear lower cross beam (170), wherein the two outer dies (120) are arranged at two ends of the bottom die (110), the inner mold (130) is arranged between the two outer molds (120), the two hanging basket tripods (140) are arranged at two sides of the inner mold (130), two ends of the front upper cross beam (150) are respectively and fixedly arranged at one end of two hanging basket tripods (140), the front lower cross beam (160) is fixedly arranged on the front upper cross beam (150), the front lower cross beam (160) is arranged at one end of the bottom die (110), one side of the rear lower cross beam (170) is fixedly arranged on the front lower cross beam (160), one side of the rear lower cross beam (170) is arranged at one end, far away from the front lower cross beam (160), of the bottom die (110);
the walking assembly (200) comprises an outer die walking beam hanger rod (210), an outer die walking beam hanger rod hanger (220), an outer die walking beam roller (230) and an outer die walking beam (240), one end of the outer die walking beam hanger rod (210) is fixedly installed on the bottom die (110), one end of the outer die walking beam hanger rod hanger (220) is fixedly installed at one end, away from the bottom die (110), of the outer die walking beam hanger rod (210), the outer die walking beam roller (230) is fixedly installed at one end, away from the outer die walking beam hanger rod (210), of the outer die walking beam hanger rod hanger (220), and the outer die walking beam (240) is slidably installed on the outer die walking beam hanger rod (220); and
the monitoring assembly (300) is arranged below the mounting assembly (100) and used for monitoring stress and deformation of a component and giving early warning in real time.
2. The continuous rigid frame bridge cantilever construction hanging basket safety monitoring device of claim 1, wherein: monitoring subassembly (300) includes first fixing base (310), foil gage (320) second fixing base (330), first fixing base (310) fixed mounting in the one end of preceding bottom end rail (160), the one end fixed mounting of foil gage (320) in one side of first fixing base (310), one side fixed mounting of second fixing base (330) in foil gage (320) is kept away from the one end of first fixing base (310), second fixing base (330) fixed mounting in preceding bottom end rail (160) is kept away from the one end of first fixing base (310).
3. The continuous rigid frame bridge cantilever construction hanging basket safety monitoring device of claim 1, wherein: hang basket tripod (140) and include main longitudinal beam (141), stand (142) and oblique pull strap (143), stand (142) fixed mounting in on main longitudinal beam (141), the one end fixed mounting of pull strap (143) to one side in the one end of main longitudinal beam (141), the other end fixed mounting of pull strap (143) to one side in stand (142) is kept away from the one end of main longitudinal beam (141).
4. The continuous rigid frame bridge cantilever construction hanging basket safety monitoring device of claim 1, wherein: a scissor support (144) is fixedly arranged between the two hanging basket tripods (140).
5. The continuous rigid frame bridge cantilever construction hanging basket safety monitoring device of claim 1, wherein: two jacks (151) are fixedly mounted on the front upper cross beam (150), and the two jacks (151) are fixedly mounted at two ends of the front upper cross beam (150).
6. The continuous rigid frame bridge cantilever construction hanging basket safety monitoring device of claim 1, wherein: a chain block (171) is fixedly mounted on the rear lower beam (170), and one end, far away from the rear lower beam (170), of the chain block (171) is fixedly mounted on the outer die walking beam (240).
7. The continuous rigid frame bridge cantilever construction hanging basket safety monitoring device of claim 1, wherein: and a bottom plate distribution beam (172) is fixedly mounted on the rear lower cross beam (170), and one end, far away from the rear lower cross beam (170), of the bottom plate distribution beam (172) is fixedly mounted on the front lower cross beam (160).
8. The continuous rigid frame bridge cantilever construction hanging basket safety monitoring device of claim 1, wherein: one end of the front upper cross beam (150) is fixedly provided with a hanging strip (152), and one end of the hanging strip (152) far away from the front upper cross beam (150) is fixedly arranged on the front lower cross beam (160).
9. The continuous rigid frame bridge cantilever construction hanging basket safety monitoring device of claim 3, wherein: and a rear reaction force carrying pole (1411) is fixedly arranged at one end of the main longitudinal beam (141).
10. The continuous rigid frame bridge cantilever construction hanging basket safety monitoring device of claim 3, wherein: and one end of the upright column (142) far away from the inclined pull belt (143) is provided with an upright column ball bowl support (1421).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121217828.4U CN215217666U (en) | 2021-06-02 | 2021-06-02 | Basket safety monitoring device is hung in construction of continuous rigid frame bridge cantilever |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121217828.4U CN215217666U (en) | 2021-06-02 | 2021-06-02 | Basket safety monitoring device is hung in construction of continuous rigid frame bridge cantilever |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215217666U true CN215217666U (en) | 2021-12-17 |
Family
ID=79422961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121217828.4U Active CN215217666U (en) | 2021-06-02 | 2021-06-02 | Basket safety monitoring device is hung in construction of continuous rigid frame bridge cantilever |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215217666U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114892523A (en) * | 2022-01-07 | 2022-08-12 | 中铁十六局集团第五工程有限公司 | Bridge side span closure construction method |
-
2021
- 2021-06-02 CN CN202121217828.4U patent/CN215217666U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114892523A (en) * | 2022-01-07 | 2022-08-12 | 中铁十六局集团第五工程有限公司 | Bridge side span closure construction method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111379408B (en) | Rail frame integrated wall-attached supporting device and jacking method thereof | |
| CN215217666U (en) | Basket safety monitoring device is hung in construction of continuous rigid frame bridge cantilever | |
| CN109694024A (en) | A kind of self-propelled lifting hoisting platform device | |
| CN106216408A (en) | A kind of device for changing wide and heavy plate mill hydraulic AGC cylinder and using method thereof | |
| CN111847267A (en) | Cantilever crane | |
| CN208814462U (en) | A kind of efficient stable tractor stand | |
| CN216740723U (en) | Parallel vehicle device for parallel movement of bailey frames | |
| CN220033825U (en) | Anti-falling device for electric hoist | |
| CN207351810U (en) | A kind of lifting lug load testing machine | |
| CN220789441U (en) | Prepressing device of bridge girder erection machine | |
| CN217296992U (en) | Processing of precast concrete drain pipe is with verifying attachment that dispatches from factory | |
| CN2210934Y (en) | Safety integrate-lifting scaffold | |
| CN217000822U (en) | Pedal with high safety performance for scaffold | |
| CN217452060U (en) | Supplementary centre gripping roller deposits maintenance platform | |
| CN216747201U (en) | Rock direct shear apparatus of integral type structure | |
| CN219010950U (en) | Monorail sliding operation platform for overhauling outer side of subway viaduct | |
| CN214495483U (en) | Crane frame body convenient to install | |
| CN116768092A (en) | Anti-falling device for electric hoist | |
| CN217581155U (en) | Building equipment is adjustable attaches wall seat subassembly | |
| CN213022333U (en) | Connection structure test device of sharing iron tower | |
| CN218434594U (en) | Cargo boom angle check out test set | |
| CN217580334U (en) | High strain detection unhooking device for foundation pile | |
| CN111775779B (en) | Self-supporting balanced operation device for contact net | |
| CN211946018U (en) | Tower crane balance arm structure with stable steel frame structure | |
| CN220011906U (en) | Bracket assembly of trolley towing rope pulley |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |