CN115233565A - Linear top of tower guiding mechanism of adjustable catwalk bearing cable - Google Patents
Linear top of tower guiding mechanism of adjustable catwalk bearing cable Download PDFInfo
- Publication number
- CN115233565A CN115233565A CN202211065938.2A CN202211065938A CN115233565A CN 115233565 A CN115233565 A CN 115233565A CN 202211065938 A CN202211065938 A CN 202211065938A CN 115233565 A CN115233565 A CN 115233565A
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- bearing
- cable
- rope
- catwalk
- adjustable
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/02—Suspension bridges
Abstract
The invention discloses a tower top adjusting mechanism capable of adjusting the shape of a catwalk bearing cable, which relates to the field of bridge engineering and comprises: a load bearing cable; the bearing cable is arranged on the cable rotating saddle, and the cable rotating saddle is arranged on the tower top; the rope clamp is used for clamping the bearing rope; the rope clamping device is positioned above the pushing device, the pushing device can drive the rope clamping device to move, and the rope clamping device can drive the bearing rope to move; the ejector comprises a vertical driving mechanism and a transverse driving mechanism, the vertical driving mechanism is connected with the transverse driving mechanism, the vertical driving mechanism can drive the rope clamping device to move vertically, and the transverse driving mechanism can drive the rope clamping device to move transversely. The linear tower top adjusting mechanism of this adjustable catwalk bearing cable is transferred cable precision high and little to the damage of bearing cable.
Description
Technical Field
The invention relates to the field of bridge engineering, in particular to a tower top adjusting mechanism capable of adjusting the shape of a catwalk bearing cable.
Background
The catwalk system is the most important temporary project for the construction of the upper structure of the suspension bridge, and is a construction platform for the traction of main cable strands, the adjustment of the strands, the fastening of the main cable, the installation of cable clamps and slings, the hoisting of steel box girders, the winding protection of the main cable and the auxiliary structure of the cable system. The catwalk mainly comprises a bearing cable, a railing, a handrail cable, a portal frame, a surface layer system, a transverse channel, an anchoring system, a tower anchor rotating cable saddle, a circulating system and the like.
The overall linear shape of the catwalk system is directly related to the safety and convenience degree of the construction of the upper structure of the suspension bridge. Because the residual inelastic deformation of the cat-way bearing cable after being pre-tensioned is influenced by various factors such as the elastic modulus of the material, the structural load deviation, the anchor span tension and the like, the linear control of the continuous cat-way is difficult in the construction. The linear and design linear of catwalk after whole erection completion has certain degree of deviation, hardly reaches the expectation effect, brings adverse effect for construction safety and convenience. In order to ensure that the load-bearing cables of the catwalk are stressed uniformly, the linear shapes of the load-bearing cables need to be adjusted uniformly. The main process of the traditional overall linear adjustment of the catwalk is as follows: firstly, calculating the adjusting length of each catwalk bearing cable according to measurement data, arranging two jacks at the joint of each catwalk bearing cable and an anchor, arranging a guide chain at the top of a main tower of each catwalk bearing cable, sequentially tensioning or releasing each catwalk bearing cable by using the jacks, and simultaneously, manually drawing all the guide chains in the same direction to integrally tighten each catwalk bearing cable in the direction needing to be adjusted; and repeating the steps, and alternately adjusting the catwalk bearing cables at the anchorage position and the tower top position for multiple times until the overall line shape of the catwalk meets the design requirement. However, the existing adjusting cable adjusting precision for the shape of the catwalk bearing cable is poor, and the damage to the bearing cable is large.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide the adjustable catwalk bearing cable line-shaped tower top adjusting mechanism which is high in cable adjusting precision and small in damage to a bearing cable.
The invention is realized by adopting the following technical scheme:
a linear top of tower guiding mechanism of adjustable catwalk bearing cable includes: a load bearing cable; the bearing cable is arranged on the cable rotating saddle, and the cable rotating saddle is arranged on the tower top; the rope clamp is used for clamping the bearing rope; the rope clamping device is positioned above the pushing device, the pushing device can drive the rope clamping device to move, and the rope clamping device can drive the bearing rope to move; the ejector comprises a vertical driving mechanism and a transverse driving mechanism, the vertical driving mechanism is connected with the transverse driving mechanism, the vertical driving mechanism can drive the rope clamping device to move vertically, and the transverse driving mechanism can drive the rope clamping device to move transversely.
Preferably, the vertical driving mechanism comprises a vertical jack and a sliding plate, and the sliding plate is connected with the vertical jack and the rope clamping device respectively.
Preferably, the transverse driving mechanism comprises a translation jack and a sliding box, and the sliding box is connected with the translation jack and the vertical driving mechanism respectively.
Preferably, the cable saddle comprises an embedded part, a saddle body and a saddle groove part, wherein the embedded part is arranged at the bottom of the saddle body, the saddle groove part is arranged at the top of the saddle body, and the bearing cable is placed on the saddle groove part.
Preferably, a plurality of grooves are formed in the saddle groove piece, each groove comprises a front end portion and a rear end portion, the front end portion is obliquely arranged, the rear end portion is horizontally arranged, and the end with the high front end portion is connected with the end of the rear end portion.
Preferably, the rope clamping device comprises an upper clamping plate and a lower clamping plate, the bearing rope is located between the upper clamping plate and the lower clamping plate, and the upper clamping plate and the lower clamping plate are connected to clamp the bearing rope.
Preferably, the top surface of the sliding plate is provided with a plurality of drainage grooves, and the surfaces of the drainage grooves are arranged in an arc-shaped structure protruding upwards.
Preferably, the bottom surface of the rope clamping device is provided with a cavity matched with the top surface of the sliding plate in shape, and the vertical jack can drive the top of the sliding plate to enter the cavity.
Preferably, a plurality of through holes are formed in the sliding plate, vertically penetrate through the sliding plate and are communicated with the drainage grooves.
Preferably, the inner wall of the cavity is arc-shaped, the side surface of the top of the sliding plate is arc-shaped, and the shape of the inside of the cavity corresponds to that of the side surface of the top of the sliding plate.
Compared with the prior art, the invention has the beneficial effects that: the tower top adjusting mechanism capable of adjusting the shape of the catwalk bearing cable solves the problems that the bearing cable adjusting cable is uneven and a coating is damaged due to the fact that a conventional hand-pulling guide chain is adopted for pulling in the construction of a suspension bridge catwalk. According to the top adjusting mechanism capable of adjusting the linear shape of the catwalk bearing cable, the top pusher is provided with the top pusher, the top pusher comprises the vertical driving mechanism and the transverse driving mechanism, the vertical driving mechanism can drive the cable clamp to vertically move so that the bearing cable is jacked up, the transverse driving mechanism can drive the cable clamp to transversely move so that the bearing cable moves towards the direction needing to be adjusted, and after the bearing cable is adjusted to a proper position, the bearing cable is placed downwards and anchored, so that accurate cable adjustment control is realized, the damage to the bearing cable is small, and the safety of a catwalk structure is protected. The tower top adjusting mechanism capable of adjusting the shape of the catwalk bearing cable is simple and convenient to operate, synchronous cable adjusting operation of a plurality of bearing cables can be completed only by jacking, sliding and descending the bearing cables through the jacking device, operation time is greatly shortened, labor cost is saved, and construction efficiency is improved.
Drawings
Fig. 1 is a schematic structural diagram of a tower top adjusting mechanism of the adjustable catwalk load-bearing cable line shape in this embodiment.
Fig. 2 is a schematic structural diagram of the ejector in this embodiment.
Fig. 3 is a schematic structural view of the rope clamp of the present embodiment.
Fig. 4 is a front view schematically showing a cable saddle in this embodiment.
Fig. 5 is a side view schematically showing the cable saddle of this embodiment.
Fig. 6 is a schematic top structure diagram of the slide plate in this embodiment.
Fig. 7 is a schematic view of the bottom structure of the rope clamp in this embodiment.
Reference numerals are as follows: 1. a load bearing cable; 2. a cable saddle; 3. a rope clamp; 4. a pusher; 5. a vertical drive mechanism; 6. a lateral drive mechanism; 7. a vertical jack; 8. a slide plate; 9. a translation jack; 10. a sliding box; 11. embedding parts; 12. a saddle body; 13. a saddle groove member; 14. a groove; 15. a front end portion; 16. a rear end portion; 17. an upper splint; 18. a lower splint; 19. a slot structure; 20. a drainage groove; 21. a cavity; 22. and a through hole.
Detailed Description
The technical solution provided by the invention is explained in more detail below with reference to fig. 1-7.
As shown in fig. 1 to 7, an embodiment of the present invention provides a linear tower top adjusting mechanism for a load-bearing cable of an adjustable catwalk, where the linear tower top adjusting mechanism for the load-bearing cable of the adjustable catwalk is applied to a suspension bridge engineering, and the linear tower top adjusting mechanism for the load-bearing cable of the adjustable catwalk can accurately adjust the linear shape of a load-bearing cable 1. The bearing rope 1 is a main bearing stress structure of the catwalk. The bearing cable 1 of the catwalk is divided into three sections including a middle span and a side span, and the sections are connected by hot-cast cable heads to form the continuous catwalk.
The linear tower top adjusting mechanism of the adjustable catwalk bearing cable comprises a bearing cable 1, a rotating cable saddle 2, a cable clamp 3 and a pushing device 4, wherein the bearing cable 1 is arranged on the rotating cable saddle 2, the rotating cable saddle 2 is arranged on the top of the tower, the cable clamp 3 is used for clamping the bearing cable 1, the cable clamp 3 is positioned above the pushing device 4, the pushing device 4 can drive the cable clamp 3 to move, and the cable clamp 3 can drive the bearing cable 1 to move; the ejector 4 comprises a vertical driving mechanism 5 and a transverse driving mechanism 6, the vertical driving mechanism 5 is connected with the transverse driving mechanism 6, the vertical driving mechanism 5 can drive the rope clamping device 3 to vertically move, and the transverse driving mechanism 6 can drive the rope clamping device 3 to transversely move. The vertical driving mechanism 5 comprises a vertical jack 7 and a sliding plate 8, and the sliding plate 8 is respectively connected with the vertical jack 7 and the rope clamping device 3. The transverse driving mechanism 6 comprises a translation jack 9 and a sliding box 10, and the sliding box 10 is respectively connected with the translation jack 9 and the vertical driving mechanism 5. Both sides of the tower top are provided with lifters 4. The ejector 4 also comprises a deviation correcting device which can prevent the bearing cable 1 from deviating during the transverse movement, and the precision of the bearing cable 1 during adjustment is further improved.
The swivel cable saddle 2 is a steering device of the catwalk bearing cable 1 on the top of the tower, is an important component of a three-span continuous catwalk and mainly bears vertical loads and unbalanced horizontal forces transmitted by the catwalk bearing cable 1. The cable saddle 2 comprises an embedded part 11, a saddle body 12 and a saddle groove part 13, wherein the embedded part 11 is arranged at the bottom of the saddle body 12, the saddle groove part 13 is arranged at the top of the saddle body 12, and the bearing cable 1 is placed on the saddle groove part 13. The saddle body 12 is a box-shaped structure formed by welding steel plates, comprises a top plate, a bottom plate, a web plate and a stiffening plate, and is anchored in concrete on the tower top through embedded parts 11. The saddle groove member 13 is provided with a plurality of grooves 14, each groove 14 comprises a front end portion 15 and a rear end portion 16, the front end portion 15 is obliquely arranged, the rear end portion 16 is horizontally arranged, and one end of the front end portion 15, which is high, is connected with one end of the rear end portion 16. By providing the tip end portion 15 obliquely, the wear of the saddle tank member 13 to the load bearing cable 1 can be effectively reduced. Both sides of the tower top are provided with cable saddles 2, and the front end part 15 of the groove 14 in each cable saddle 2 faces to the outer side of the tower top.
The rope clamping device 3 comprises an upper clamping plate 17 and a lower clamping plate 18, the bearing rope 1 is positioned between the upper clamping plate 17 and the lower clamping plate 18, and the upper clamping plate 17 and the lower clamping plate 18 are connected and clamped with the bearing rope 1. The rope clamping device 3 is a device for fixing the catwalk bearing rope 1, is formed by connecting an upper clamping plate 17 and a lower clamping plate 18 through high-strength bolts, and meets the anchoring stress requirement of the catwalk bearing rope by applying pretightening force to the high-strength bolts. Wherein, the groove structure 19 of installation bearing rope 1 is set up according to catwalk bearing rope 1's interval and specification to punch board 17 and lower plate 18 to make punch board 17 and lower plate 18 tight more stable to bearing rope 1's the clamp.
The top surface of the sliding plate 8 is provided with a plurality of drainage grooves 20, and the surfaces of the drainage grooves 20 are arranged in an arc-shaped structure protruding upwards. Because the linear top of tower guiding mechanism of adjustable catwalk bearing cable of this embodiment is located open air, slide 8 is located the top of top pusher 4, if the top surface of slide 8 is conventional planar structure, when weather is rainy, the rainwater can accumulate at the top of slide 8, after slide 8 pushes up rope gripper 3, because lateral drive mechanism 6 leans on the frictional force of slide 8 and rope gripper 3 to drive rope gripper 3 transversely, the rainwater can lead to skidding between slide 8 and rope gripper 3, thereby influence lateral drive mechanism 6 and to drive rope gripper 3 transversely, this embodiment is through being provided with a plurality of drainage grooves 20 at slide 8's top surface, the water of slide 8 top surface can be discharged along drainage grooves 20, through setting the surface of drainage grooves 20 to the proud arc structure that makes progress, more be favorable to the discharge of rainwater, thereby prevent that the rainwater accumulation reason and make and skid between slide 8 and rope gripper 3, in addition, the setting of drainage grooves 20 has improved the roughness of slide 8 top surface, thereby improved the friction degree between slide 8 and the rope gripper 3, the further the condition that the friction between 3 and the rope gripper 3 that skids appears. By discharging rainwater from the drainage groove 20, the weight is reduced, and the pressure of the vertical driving mechanism 5 is reduced, thereby reducing the energy consumption of the vertical driving mechanism 5.
The bottom surface of the rope clamping device 3 is provided with a cavity 21 matched with the top surface of the sliding plate 8 in shape, and the vertical jack 7 can drive the top of the sliding plate 8 to enter the cavity 21. When adjusting bearing rope 1, vertical jack 7 needs earlier the kicking-up of slide plate 8, and slide plate 8 is again with rope gripper 3 and bearing rope 1 kicking-up, through be provided with the top surface shape assorted cavity 21 with slide plate 8 in the bottom surface of rope gripper 3, in cavity 21 can be carried out at slide plate 8's top, in follow-up slide plate 8 lateral shifting process, slide plate 8 can drive rope gripper 3 and bearing rope 1 lateral shifting smoothly to the current situation that appears skidding between slide plate 8 and the rope gripper 3 takes place.
A plurality of through holes 22 are formed in the sliding plate 8, the through holes 22 vertically penetrate through the sliding plate 8, and the through holes 22 are communicated with the drainage grooves 20. When rainwater flows into the drain grooves 20, the rainwater can be discharged through the through-holes 22, thereby accelerating the efficiency of rainwater drainage. When adjusting bearing rope 1, vertical jack 7 need earlier with slide plate 8 jack-up, slide plate 8 is again with rope clamping device 3 and bearing rope 1 jack-up, because still there is certain air in rope clamping device 3's the cavity 21, slide plate 8's top is carrying out the in-process of cavity 21, if the air is not in time discharged, be equivalent to slide plate 8 air in compression cavity 21, the air plays the effect of blockking to slide plate 8's rising, through be provided with a plurality of through-hole 22 on slide plate 8, make the air can follow through-hole 22 and in time discharge, guaranteed that slide plate 8 can get into in rope clamping device 3's top entering cavity smoothly.
The inner wall of cavity 21 is the setting of arc form, and the side at slide plate 8 top is the setting of arc form, and the shape of the inside of cavity 21 is corresponding with the shape of slide plate 8 top side. Adopt above-mentioned structure, when the in-process of the top entering cavity 21 of slide block 8, the air can be discharged between the side of cavity 21 and the top side of slide block 8, the inner wall of cavity 21 and the side at 8 tops of slide block are the arc form and set up the discharge that the arc form structure more is favorable to the air, in addition, the inner wall of cavity 21 and the side at 8 tops of slide block are the arc form because the surface is smooth, can reduce the wearing and tearing between the inner wall of cavity 21 and the side at 8 tops of slide block.
When the linear tower top adjusting mechanism of the adjustable catwalk bearing cable of the embodiment is used for adjusting the bearing cable 1 of the catwalk, the vertical jack 7 jacks the sliding plate 8, the cable clamp 3 is located above the sliding plate 8, the sliding plate 8 jacks the cable clamp 3 and the bearing cable 1, the translation jack 9 pushes the sliding box 10, the sliding box 10 moves, the sliding box 10 drives the vertical jack 7 and the sliding plate 8 to move, the sliding plate 8 drives the cable clamp 3 and the bearing cable 1 to move, and therefore the effect of adjusting the bearing cable 1 of the catwalk is achieved, after the bearing cable 1 is adjusted to a proper position, the vertical jack 7 drives the sliding plate 8 to descend, the cable clamp 3 and the bearing cable 1 are put down, and finally the bearing cable 1 of the catwalk is anchored.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (10)
1. The utility model provides a linear top of tower guiding mechanism of adjustable catwalk bearing cable which characterized in that includes:
a load bearing cable;
the bearing cable is arranged on the rotating cable saddle, and the rotating cable saddle is arranged on the tower top;
the rope clamp is used for clamping the bearing rope;
the rope clamping device is positioned above the pushing device, the pushing device can drive the rope clamping device to move, and the rope clamping device can drive the bearing rope to move;
the ejector comprises a vertical driving mechanism and a transverse driving mechanism, the vertical driving mechanism is connected with the transverse driving mechanism, the vertical driving mechanism can drive the rope clamping device to move vertically, and the transverse driving mechanism can drive the rope clamping device to move transversely.
2. The adjustable catwalk load-bearing roped tower top adjustment mechanism of claim 1, wherein the vertical drive mechanism comprises a vertical jack and a slide plate, the slide plate being connected to the vertical jack and the rope gripper, respectively.
3. The adjustable catwalk load-bearing cord-shaped tower top adjustment mechanism of claim 1, wherein the lateral drive mechanism comprises a translation jack and a slide box, and the slide box is connected with the translation jack and the vertical drive mechanism, respectively.
4. The adjustable catwalk load-bearing cable liner tower top adjustment mechanism of claim 1, wherein said cable swivel saddle comprises an embedded part, a saddle body and a saddle groove part, said embedded part is disposed at the bottom of said saddle body, said saddle groove part is disposed at the top of said saddle body, and said load-bearing cable is placed on said saddle groove part.
5. The linear tower top adjustment mechanism of claim 4, wherein the saddle groove member has a plurality of grooves, each groove comprises a front end and a rear end, the front end is disposed obliquely, the rear end is disposed horizontally, and the higher end of the front end is connected to the end of the rear end.
6. The linear overhead adjustment mechanism of adjustable catwalk load-bearing cables of claim 1, wherein said cable clamp comprises an upper clamp plate and a lower clamp plate, said load-bearing cables being positioned between said upper clamp plate and said lower clamp plate, said upper clamp plate and said lower clamp plate being connected to clamp said load-bearing cables.
7. The linear tower top adjusting mechanism of the adjustable catwalk bearing cable according to claim 2, wherein the top surface of the sliding plate is provided with a plurality of drainage grooves, and the surfaces of the drainage grooves are arranged in an arc-shaped structure protruding upwards.
8. The adjustable catwalk load-bearing guy line-shaped tower top adjusting mechanism of claim 7, wherein a cavity matched with the top surface of the sliding plate in shape is arranged on the bottom surface of the rope clamp, and the vertical jack can drive the top of the sliding plate to enter the cavity.
9. The linear tower top adjustment mechanism of adjustable catwalk bearing cables of claim 8, wherein the sliding plate is provided with a plurality of through holes, the through holes vertically penetrate through the sliding plate, and the through holes are communicated with the drainage grooves.
10. The linear tower top adjustment mechanism of adjustable catwalk bearing cables of claim 8, wherein the inner wall of the cavity is arc-shaped, the side of the top of the sliding plate is arc-shaped, and the shape of the inside of the cavity corresponds to the shape of the side of the top of the sliding plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211065938.2A CN115233565A (en) | 2022-08-31 | 2022-08-31 | Linear top of tower guiding mechanism of adjustable catwalk bearing cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211065938.2A CN115233565A (en) | 2022-08-31 | 2022-08-31 | Linear top of tower guiding mechanism of adjustable catwalk bearing cable |
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| Publication Number | Publication Date |
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| CN115233565A true CN115233565A (en) | 2022-10-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211065938.2A Pending CN115233565A (en) | 2022-08-31 | 2022-08-31 | Linear top of tower guiding mechanism of adjustable catwalk bearing cable |
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| CN (1) | CN115233565A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105401524A (en) * | 2015-10-23 | 2016-03-16 | 中交第二公路工程局有限公司 | Structural device for enabling continuous catwalk track cable to pass by tower top for suspension bridge |
| CN105951603A (en) * | 2016-06-17 | 2016-09-21 | 柳州黔桥工程材料有限公司 | Pushing and lifting device of walking type pushing system |
| RU2598704C1 (en) * | 2015-05-15 | 2016-09-27 | Акционерное общество "Государственный ракетный центр имени академика В.П. Макеева" | Method of replacing lifting crane cable |
| CN206986721U (en) * | 2017-04-14 | 2018-02-09 | 中交二公局第二工程有限公司 | A kind of tower top cat road turns cable saddle Chu Mao roads track cable adjusting means |
| CN212358022U (en) * | 2020-05-25 | 2021-01-15 | 平原精科液压技术有限公司 | Novel walking top pushes away jack |
| CN213571553U (en) * | 2020-07-08 | 2021-06-29 | 中交二公局第二工程有限公司 | Suspension bridge catwalk structure with length of more than 2000m |
| CN214089424U (en) * | 2020-11-18 | 2021-08-31 | 中交四公局第五工程有限公司 | Continuous catwalk bearing rope small-space tower top rotating cable structure |
-
2022
- 2022-08-31 CN CN202211065938.2A patent/CN115233565A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2598704C1 (en) * | 2015-05-15 | 2016-09-27 | Акционерное общество "Государственный ракетный центр имени академика В.П. Макеева" | Method of replacing lifting crane cable |
| CN105401524A (en) * | 2015-10-23 | 2016-03-16 | 中交第二公路工程局有限公司 | Structural device for enabling continuous catwalk track cable to pass by tower top for suspension bridge |
| CN105951603A (en) * | 2016-06-17 | 2016-09-21 | 柳州黔桥工程材料有限公司 | Pushing and lifting device of walking type pushing system |
| CN206986721U (en) * | 2017-04-14 | 2018-02-09 | 中交二公局第二工程有限公司 | A kind of tower top cat road turns cable saddle Chu Mao roads track cable adjusting means |
| CN212358022U (en) * | 2020-05-25 | 2021-01-15 | 平原精科液压技术有限公司 | Novel walking top pushes away jack |
| CN213571553U (en) * | 2020-07-08 | 2021-06-29 | 中交二公局第二工程有限公司 | Suspension bridge catwalk structure with length of more than 2000m |
| CN214089424U (en) * | 2020-11-18 | 2021-08-31 | 中交四公局第五工程有限公司 | Continuous catwalk bearing rope small-space tower top rotating cable structure |
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