CN112854012A - Cable crane for suspension bridge with four main cables - Google Patents
Cable crane for suspension bridge with four main cables Download PDFInfo
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- CN112854012A CN112854012A CN202110332508.1A CN202110332508A CN112854012A CN 112854012 A CN112854012 A CN 112854012A CN 202110332508 A CN202110332508 A CN 202110332508A CN 112854012 A CN112854012 A CN 112854012A
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- lifting
- beam body
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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
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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
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/02—Suspension bridges
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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
- E01D19/00—Structural or constructional details of bridges
- E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
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Abstract
The invention provides a cable crane for a four-main-cable suspension bridge, which is respectively arranged on main cables at two sides of a double-main-cable suspension bridge; two groups of running gear are arranged in each group of cable crane, and the running gear is arranged on two main cables on each side. The structure of a single cable crane comprises a main beam body, wherein the bottom of the main beam body is connected with two supporting beams, each supporting beam corresponds to one main cable, the supporting beams are connected with a plurality of hoops, and the hoops are sleeved on the main cables; and a walking lifting hydraulic cylinder is also arranged on the supporting beam and is connected with the walking roller wheel, and when the walking roller wheel descends and contacts with the main cable, the walking function of the cable crane is realized. By adopting the structure that the single-side double supporting beams correspond to the double main cables, the gravity center of the whole equipment is positioned between the two main cables on the single side, the gravity center of a single cable crane is reduced, and the stability and the anti-overturning performance of the cable crane equipment are improved.
Description
Technical Field
The invention relates to the field of bridge construction, in particular to a cable crane for a four-main-cable suspension bridge.
Background
At present, most of large-span suspension bridges built at home and abroad adopt a cable system in which a main cable is arranged on one side of a transverse bridge. The bearing capacity of a single main cable arranged on one side of the transverse bridge is limited, and the bearing capacity can be improved by increasing the section diameter of the main cable. Therefore, for a suspension bridge with a large span, the diameter of the main cable is often designed to be very large. For example, the diameter of a main cable of a certain Yangtze river bridge reaches 1.3 m. The larger the diameter of the main cable is, the larger the cable clamp connected with the main cable is, and the difficulty of cable tightening and cable clamp anti-sliding is greatly increased.
With the development of the suspension bridge towards a larger span and higher traffic capacity, in the future, two main cables are arranged on one side of the suspension bridge to form a direct solution for replacing the increase of the main cables, for example, a certain bridge in planning is provided, the full-bridge main span is 2180m, the stiffening girder adopts a double-layer steel truss, and the full-bridge can meet the bidirectional 16-lane traffic condition. The cable crane is used as a common construction device for erecting a main beam of a suspension bridge and is applied to a plurality of projects. However, for erecting a main beam of a single-side double-main-cable suspension bridge, the traditional cable-mounted crane cannot meet the construction requirements.
In the prior art, CN103590335A describes a suspension bridge double main cable integral cable clamp. CN 111119052A describes a tower top anchoring device for the connection of double main cables of a catenary pipeline bridge. CN 111424561A has recorded the layering suspension structure of the two main push-towing rope steel truss stiffening girder suspension bridges in unilateral, and this scheme adopts the layering suspension structure to solve the too concentrated technical problem of hoist cable hoisting point, but the installation of this scheme and regulation are comparatively complicated, appear the uneven problem of atress easily.
Disclosure of Invention
The invention aims to solve the technical problem of providing a four-main-cable suspension bridge cable crane, which can be suitable for hoisting a bridge girder under a structure of single-side double main cables and improve the bearing capacity.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a cable crane for a four-main-cable suspension bridge is used for being respectively arranged on main cables (6) on two sides of a double-main-cable suspension bridge;
two groups of running gear are arranged in each group of cable crane, and the running gear is arranged on two main cables on each side.
In the preferred scheme, the structure of a single cable crane comprises a main beam body, the bottom of the main beam body is connected with two supporting beams, each supporting beam corresponds to a main cable, the supporting beams are connected with a plurality of hoops, and the hoops are sleeved on the main cables;
and a walking lifting hydraulic cylinder is also arranged on the supporting beam and is connected with the walking roller wheel, and when the walking roller wheel descends and contacts with the main cable, the walking function of the cable crane is realized.
In the preferred scheme, the cable carrying cranes are divided into two groups, and the two groups of cable carrying cranes are not mechanically connected;
the main beam body is horizontally arranged along the radial direction of the main cables and spans two main cables on each side of the double-main-cable suspension bridge;
the supporting beam is arranged along the axial direction of the main cable, and two ends of the supporting beam are used for being connected with the traction device.
In the preferred scheme, the bottom of the main beam body is provided with a beam body hinging seat, and the supporting beam is hinged with the beam body hinging seat so as to enable the structure of the main beam body to form a gravity balance structure.
In the preferred scheme, the main beam body is horizontally arranged along the radial direction of the main cables, and the main beam body spans two main cables on each side;
and lifting jack seats are arranged at the positions, close to the two ends, of the main beam body, lifting jacks are fixedly arranged on the lifting jack seats, steel strands penetrate through the lifting jacks to be connected with a lifting appliance, and the lifting appliance is used for being connected with the main beam of the bridge.
In the preferred scheme, the main beam body is horizontally arranged along the radial direction of the main cables, and the main beam body spans two main cables on each side;
the main beam body is provided with upright columns near the two ends, the bottoms of the upright columns are provided with lifting jack seats, lifting jacks are fixedly arranged on the lifting jack seats, steel strands penetrate through the lifting jacks to be connected with a lifting appliance, and the lifting appliance is used for being connected with the main beam of the bridge;
a working platform is arranged on the outer side of the jack seat, the working platform is fixedly connected with the main beam body through a diagonal draw bar, and the working platform is used for placing a hydraulic pump station;
the working platform is lower than the top of the main cable.
In the preferred scheme, a level gauge and/or an attitude sensor are arranged on a bridge girder;
the PLC is electrically connected with the gradienter and/or the attitude sensor so as to control each lifting jack, the walking lifting hydraulic cylinder and the traction device according to signals of the gradienter and/or the attitude sensor.
In the preferred scheme, a winding roll and a steel strand dredging frame are further arranged at the top of the main beam close to the two ends, and the steel strand is connected with the steel strand dredging frame after bypassing the winding roll.
In the preferred scheme, a first hanging beam is arranged at the top of the hanging tool, the bottom of the first hanging beam is hinged with a second hanging beam, and hanging rods are arranged at two ends of the second hanging beam and are used for being connected with a main beam of the bridge;
the positions of two ends of the top of the first hanging beam are provided with wire wheel seats, and the two wire wheel seats are respectively used for being connected with steel strands of two lifting jacks at two ends of the main beam body;
the projections of the first hanging beam and the second hanging beam on the horizontal plane are mutually vertical.
In the preferred scheme, the bottom of the first hanging beam is hinged with a hanging beam seat, lower steps hooked inwards are arranged on two sides of the hanging beam seat, upper steps protruding outwards are arranged on two sides of the second hanging beam, and the lower steps hook the upper steps and can slide relatively;
the lifting device is characterized by further comprising an adjusting pull rod, one end of the adjusting pull rod is connected with the second lifting beam, the other end of the adjusting pull rod is connected with the lifting beam seat, and the adjusting pull rod is of a telescopic structure and used for adjusting the relative position between the first lifting beam and the second lifting beam.
The invention provides a cable crane for a four-main-cable suspension bridge, which is characterized in that a structure that a single-side double supporting beam corresponds to double main cables is adopted, so that the gravity center of the whole equipment is positioned between two main cables on a single side, and the gravity center of a hydraulic pump station is arranged at a position which is flush with or even lower than the upper surfaces of the main cables, so that the gravity center of a single cable crane is reduced, and the stability and the anti-overturning performance of the equipment of the cable crane are improved. By the structure, the hydraulic pump stations can be symmetrically arranged on the outer sides of the two main cables to form left and right balance, the weight of the hydraulic pump stations and the lifting appliance is utilized to form front and back balance of the main beam, and the horizontal state of the main beam is not influenced by bending of the main cables. The office room can be arranged on the top of the main beam through the structure. The lifting appliance solves the problem of centralized lifting point setting in the prior art. The cable cranes on the two sides of the suspension bridge are not in rigid mechanical connection, so that the dead weight of the cable crane is further reduced, and the construction safety is improved.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
fig. 1 is a front view of the present invention.
Fig. 2 is a side view of the present invention.
Fig. 3 is a partially enlarged front view of the main beam of the present invention.
Fig. 4 is an enlarged partial side view of the main beam of the present invention.
Fig. 5 is an enlarged partial front view of the main beam and hydraulic lift system of the present invention.
Fig. 6 is an enlarged partial side view of the hydraulic lift system of the present invention.
Fig. 7 is a partially enlarged front view of the spreader of the present invention.
Fig. 8 is an enlarged partial side view of the spreader of the present invention.
In the figure: girder 1, girder body hinged seat 101, lifting jack seat 102, work platform 103, diagonal draw bar 104, guardrail 105, girder body 106, upright 107, support beam 108, running gear 2, running lifting hydraulic cylinder 201, running roller 202, hydraulic lifting system 3, lifting jack 301, hydraulic pump station 302, steel strand dredging frame 303, reel 304, steel strand 305, hoist 4, reel seat 401, first hanging beam 402, hanging beam seat 403, adjusting pull rod 404, second hanging beam 405, suspender 406, lower step platform 407, upper step platform 408, office 5, main cable 6, attitude sensor 7, spirit level 8, bridge girder 9, traction device 10, catwalk 11, hoop 12.
Detailed Description
As shown in fig. 1 and 2, a four-main-cable suspension bridge cable crane is used for being respectively arranged on main cables 6 at two sides of a double-main-cable suspension bridge;
two groups of running gear 2 are arranged in each group of cable crane, and the running gear 2 is respectively arranged on two main cables 6 at each side. By the structure, the bearing structure of the single-side double main cable is realized, and by the structure, the left and right balance of the cable crane is facilitated.
As shown in fig. 1 and 2, the structure of a single cable crane includes a main beam body 106, the bottom of the main beam body 106 is connected with two support beams 108, each support beam 108 corresponds to a main cable 6, the support beams 108 are connected with a plurality of anchor ears 12, and the anchor ears 12 are sleeved on the main cables 6;
as shown in fig. 2, the support beam 108 is further provided with a plurality of traveling lift cylinders 201, and preferably, the plurality of traveling lift cylinders 201 are arranged along the longitudinal direction of the support beam 108, and the traveling lift cylinders 201 are connected to the traveling rollers 202, so that the traveling function of the cable crane is realized when the traveling rollers 202 are lowered and come into contact with the main cable 6. When walking, the hoop 12 needs to be loosened, so that a gap is formed between the hoop 12 and the main cable 6. The cable crane is towed by the towing device 10.
The preferred scheme is as shown in figure 1, the cable carrying cranes are two groups, and the two groups of cable carrying cranes are not mechanically connected; the non-mechanical connection referred to in this case means a mechanical connection having sufficient rigidity, for example a rigid mechanical connection capable of transmitting torque between each other. No cable or flexible rod connections are included.
As shown in fig. 1 and 2, the main beam body 106 is horizontally arranged in the radial direction of the main cable 6, and the main beam body 106 spans two main cables 6 on each side of the double-main-cable suspension bridge;
a support beam 108 is provided along the axial direction of the main cable 6, and both ends of the support beam 108 are used for connection with the traction apparatus 10.
Preferably, as shown in fig. 2, the bottom of the main beam 106 is provided with a beam hinge seat 101, and the support beam 108 is hinged to the beam hinge seat 101, so that the structure of the main beam 106 constitutes a gravity balance structure. The gravity balance structure here means that the main beam body 106 is balanced by the influence of the structural gravity below the upper surface of the main cable 6 so that the main beam body 106 is always kept horizontal by the gravity. As shown in fig. 1 to 4, the lifting jack base 102, the working platform 103, the hydraulic pump station 302, the spreader 4 and the bridge girder 9 all constitute a gravity balance structure of the girder body 106.
In a preferred scheme, as shown in fig. 1-5, the main beam body 106 is horizontally arranged along the radial direction of the main cables 6, and the main beam body 106 spans two main cables 6 on each side;
lifting jack seats 102 are arranged at positions, close to the two ends, of the main beam body 106, lifting jacks 301 are fixedly arranged on the lifting jack seats 102, steel strands 305 penetrate through the lifting jacks 301 to be connected with lifting appliances 4, and the lifting appliances 4 are used for being connected with the main beam 9 of the bridge.
In a preferred scheme, as shown in fig. 1-5, the main beam body 106 is horizontally arranged along the radial direction of the main cables 6, and the main beam body 106 spans two main cables 6 on each side;
the main beam body 106 is provided with upright posts 107 at positions close to the two ends, the bottom of the upright posts 107 is provided with a lifting jack seat 102, a lifting jack 301 is fixedly arranged on the lifting jack seat 102, a steel strand 305 penetrates through the lifting jack 301 to be connected with a lifting appliance 4, and the lifting appliance 4 is used for being connected with a main beam 9 of the bridge;
a working platform 103 is arranged on the outer side of the jack base 102, the working platform 103 is fixedly connected with the main beam body 106 through a diagonal draw bar 104, and the working platform 103 is used for placing a hydraulic pump station 302;
the work platform 103 is below the top of the main cable 6. By the structure, the gravity center of the whole cable crane is lowered.
In a preferred scheme, as shown in fig. 1, a level 8 and/or an attitude sensor 7 are/is arranged on a bridge girder 9; optional spirit level 8 adopts the intercommunication tubular spirit level, and the both ends of communicating pipe are equipped with vertical portion, and fixed mounting is equipped with liquid in communicating pipe on the same horizontal plane of bridge girder 9, is equipped with light or supersound level sensor of monitoring liquid level height in vertical portion. And whether the bridge girder 9 is in the same horizontal position or not is obtained by comparing the numerical values of the liquid level sensors. Whereby the level 8 controls the lifting heights of the lifting jacks 301 on both sides to be uniform.
The attitude sensor 7 can selectively adopt a gyroscope or an acceleration sensor, and the gyroscope or the acceleration sensor is mainly used for monitoring whether the traction devices 10 on the two sides of the suspension bridge are synchronous in traction and walking. Preferably, a scheme of a multi-axis gyroscope or an acceleration sensor can be adopted, and whether the levelness and the traction walking of the bridge girder 9 are synchronous or not can be monitored.
A PLC is also provided, which is electrically connected to the level gauge 8 and/or the attitude sensor 7 to control each of the lifting jack 301, the traveling hydraulic cylinder 201, and the traction apparatus 10 according to a signal of the level gauge 8 and/or the attitude sensor 7. From this structure, realize the automatic control of bridge girder 9 hoist and mount, improve construction safety nature and convenience by a wide margin.
Preferably, as shown in fig. 5 and 6, a winding roll 304 and a steel strand guide frame 303 are further disposed at positions near two ends of the top of the main beam 1, and the steel strands 305 are connected with the steel strand guide frame 303 after bypassing the winding roll 304. This structure is used for winding the steel strand 305.
In a preferred scheme, as shown in fig. 1, 2, 7 and 8, a first hanging beam 402 is arranged at the top of the hanger 4, the bottom of the first hanging beam 402 is hinged with a second hanging beam 405, and two ends of the second hanging beam 405 are provided with hanging rods 406, wherein the hanging rods 406 are used for connecting with a main bridge beam 9; preferably, one end of the suspension rod 406 is hinged with the second suspension beam 405, and the other end is hinged with a lifting lug on the bridge girder 9.
The positions of two ends of the top of the first hanging beam 402 are provided with wire wheel seats 401, and the two wire wheel seats 401 are respectively used for being connected with the steel stranded wires 305 of the two lifting jacks 301 at two ends of the main beam body 106;
the projections of the first suspension beam 402 and the second suspension beam 405 in the horizontal plane are perpendicular to each other. With this structure, the arrangement of the hanging points is convenient.
In a preferred scheme, as shown in fig. 1, 2, 7 and 8, the bottom of the first hanging beam 402 is hinged to a hanging beam seat 403, lower steps 407 hooked inward are arranged on two sides of the hanging beam seat 403, upper steps 408 protruding outward are arranged on two sides of the second hanging beam 405, and the lower steps 407 hook the upper steps 408 and can slide relatively;
an adjusting pull rod 404 is further arranged, one end of the adjusting pull rod 404 is connected with the second hanging beam 405, the other end of the adjusting pull rod 404 is connected with the hanging beam seat 403, and the adjusting pull rod 404 is of a telescopic structure and used for adjusting the relative position between the first hanging beam 402 and the second hanging beam 405. By the structure, the lifting gravity center of the lifting appliance 4 can be conveniently adjusted, and the stress of each lifting point is convenient to be uniform. The adjustment rod 404 preferably employs a hydraulic cylinder with precision travel control. For example, a hydraulic cylinder with a magnetic travel sensor is used to precisely adjust the relative position between the first and second suspension beams 402, 405. The magnetic stroke sensor is also electrically connected with the PLC and used for controlling the stroke of the hydraulic cylinder with accurate stroke control. It is further preferred that a level 8 or an attitude sensor 7 is also provided on the top of the first hoisting beam 402 for monitoring whether the first hoisting beam 402 is level, so as to be lifted synchronously by controlling the two lifting jacks 301 in the cable crane on the same side of the suspension bridge.
Taking the optimal scheme as an example, when the device is used, the traction device 10 pulls the cable crane to reach the position above the main beam 9 of the bridge, and the hoop 12 and the main cable 6 are fixed. And lowering the height of the lifting appliance 4, and hinging the lifting rod 406 of the lifting appliance 4 with the lifting lug of the bridge girder 9. A level gauge 8 and an attitude sensor 7 are arranged on a bridge girder 9. The PLC controls the two groups of lifting jacks 301 to synchronously lift the steel strands 305 so as to ensure that the bridge girder 9 is in a horizontal state, and the lifted steel strands 305 are wound on the winding roll 304. After the preset height is reached, the traction device 10 is tensioned, the PLC controls the traveling lifting hydraulic cylinder 201 to extend, the traveling roller 202 is in contact with the main cable 6, then the fixation between the anchor ear 12 and the main cable 6 is loosened, the whole cable crane is pulled to the installation position by the traction device 10, the bridge girder 9 is also suspended to the installation position, the attitude sensor 7 monitors whether the traveling of the cable cranes on the two sides of the suspension bridge is synchronous or not in the traction process, and the traveling synchronization is controlled by controlling the traction speed of the traction devices 10 on the two sides of the suspension bridge. The erection and hoisting construction of the main beam of the single-side double-main-cable suspension bridge is realized through the steps.
The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and features in the embodiments and examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention is defined by the claims, and includes equivalents of technical features of the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the invention.
Claims (10)
1. The utility model provides a four main push-towing rope bridge cable carry loop wheel machine which characterized by: the cable carrying cranes are respectively arranged on the main cables (6) at two sides of the double-main-cable suspension bridge;
two groups of running gear (2) are arranged in each group of cable crane, and the running gear (2) is arranged on two main cables (6) on each side.
2. The cable crane for a four-main cable suspension bridge of claim 1, wherein: the structure of the single cable crane comprises a main beam body (106), the bottom of the main beam body (106) is connected with two supporting beams (108), each supporting beam (108) corresponds to one main cable (6), the supporting beams (108) are connected with a plurality of hoops (12), and the hoops (12) are sleeved on the main cables (6);
and a walking lifting hydraulic cylinder (201) is also arranged on the supporting beam (108), the walking lifting hydraulic cylinder (201) is connected with the walking roller (202), and when the walking roller (202) descends and contacts with the main cable (6), the walking function of the cable crane is realized.
3. The cable crane for a four-main-cable suspension bridge of claim 2, wherein: the two groups of cable-carrying cranes are not mechanically connected;
the main beam body (106) is horizontally arranged along the radial direction of the main cable (6), and the main beam body (106) spans two main cables (6) on each side of the double-main-cable suspension bridge;
the support beam (108) is arranged along the axial direction of the main cable (6), and two ends of the support beam (108) are used for being connected with the traction device (10).
4. The cable crane for a four-main-cable suspension bridge of claim 2, wherein: the bottom of the main beam body (106) is provided with a beam body hinging seat (101), and the supporting beam (108) is hinged with the beam body hinging seat (101) so as to enable the structure of the main beam body (106) to form a gravity balance structure.
5. The cable crane for a four-main-cable suspension bridge of claim 2, wherein: the main beam body (106) is horizontally arranged along the radial direction of the main cable (6), and the main beam body (106) spans two main cables (6) on each side;
lifting jack seats (102) are arranged at positions, close to the two ends, of the main beam body (106), lifting jacks (301) are fixedly arranged on the lifting jack seats (102), steel strands (305) penetrate through the lifting jacks (301) to be connected with a lifting appliance (4), and the lifting appliance (4) is used for being connected with a main beam (9) of the bridge.
6. The cable crane for a four-main-cable suspension bridge of claim 2, wherein: the main beam body (106) is horizontally arranged along the radial direction of the main cable (6), and the main beam body (106) spans two main cables (6) on each side;
the lifting device is characterized in that upright columns (107) are arranged at positions, close to two ends, of a main beam body (106), lifting jack seats (102) are arranged at the bottoms of the upright columns (107), lifting jacks (301) are fixedly arranged on the lifting jack seats (102), steel strands (305) penetrate through the lifting jacks (301) to be connected with a lifting appliance (4), and the lifting appliance (4) is used for being connected with a bridge main beam (9);
a working platform (103) is arranged on the outer side of the jack seat (102), the working platform (103) is fixedly connected with the main beam body (106) through a diagonal draw bar (104), and the working platform (103) is used for placing a hydraulic pump station (302);
the working platform (103) is lower than the top of the main cable (6).
7. The cable crane for a four-main cable suspension bridge of claim 3, wherein: a level meter (8) and/or an attitude sensor (7) are/is arranged on the bridge girder (9);
the device is also provided with a PLC, and the PLC is electrically connected with the gradienter (8) and/or the attitude sensor (7) so as to control each lifting jack (301), the walking lifting hydraulic cylinder (201) and the traction device (10) according to signals of the gradienter (8) and/or the attitude sensor (7).
8. A four main cable suspension bridge cable hoist as claimed in any one of claims 5 or 6, wherein: and the top of the main beam (1) is also provided with a winding roll (304) and a steel strand guide frame (303) near the two ends, and the steel strand (305) is connected with the steel strand guide frame (303) after bypassing the winding roll (304).
9. A four main cable suspension bridge cable hoist as claimed in any one of claims 5 or 6, wherein: the top of the lifting appliance (4) is provided with a first lifting beam (402), the bottom of the first lifting beam (402) is hinged with a second lifting beam (405), two ends of the second lifting beam (405) are provided with lifting rods (406), and the lifting rods (406) are used for being connected with a main bridge beam (9);
the positions of two ends of the top of the first hanging beam (402) are provided with wire wheel seats (401), and the two wire wheel seats (401) are respectively used for being connected with steel strands (305) of two lifting jacks (301) at two ends of the main beam body (106);
the projections of the first hanging beam (402) and the second hanging beam (405) on the horizontal plane are vertical to each other.
10. The cable crane for a four-main cable suspension bridge of claim 9, wherein: the bottom of the first hanging beam (402) is hinged with the hanging beam seat (403), both sides of the hanging beam seat (403) are provided with lower steps (407) which are hooked inwards, both sides of the second hanging beam (405) are provided with upper steps (408) which are protruded outwards, and the lower steps (407) hook the upper steps (408) and can slide relatively;
the lifting device is characterized by further comprising an adjusting pull rod (404), wherein one end of the adjusting pull rod (404) is connected with the second lifting beam (405), the other end of the adjusting pull rod (404) is connected with the lifting beam seat (403), and the adjusting pull rod (404) is of a telescopic structure and used for adjusting the relative position between the first lifting beam (402) and the second lifting beam (405).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110332508.1A CN112854012B (en) | 2021-03-29 | 2021-03-29 | Cable crane for suspension bridge with four main cables |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110332508.1A CN112854012B (en) | 2021-03-29 | 2021-03-29 | Cable crane for suspension bridge with four main cables |
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| CN112854012A true CN112854012A (en) | 2021-05-28 |
| CN112854012B CN112854012B (en) | 2022-04-29 |
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| CN202110332508.1A Active CN112854012B (en) | 2021-03-29 | 2021-03-29 | Cable crane for suspension bridge with four main cables |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115028077A (en) * | 2022-07-12 | 2022-09-09 | 保利长大工程有限公司 | Hoisting installation device of cable saddle and installation method of cable saddle on narrow inclined plane |
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2021
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| JP2002038421A (en) * | 2000-07-27 | 2002-02-06 | Shinko Wire Co Ltd | Erection method of structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115028077A (en) * | 2022-07-12 | 2022-09-09 | 保利长大工程有限公司 | Hoisting installation device of cable saddle and installation method of cable saddle on narrow inclined plane |
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| CN112854012B (en) | 2022-04-29 |
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