CN110258347B - Crossing type conversion supporting leg for longitudinal movement of walking type bridge girder erection machine - Google Patents
Crossing type conversion supporting leg for longitudinal movement of walking type bridge girder erection machine Download PDFInfo
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- CN110258347B CN110258347B CN201910639089.9A CN201910639089A CN110258347B CN 110258347 B CN110258347 B CN 110258347B CN 201910639089 A CN201910639089 A CN 201910639089A CN 110258347 B CN110258347 B CN 110258347B
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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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Abstract
The invention relates to the technical field of bridge girder erection machines, in particular to a striding type conversion supporting leg for longitudinal movement of a walking type bridge girder erection machine, which mainly comprises: the device comprises a machine body, a first connecting piece and a second connecting piece, wherein the machine body is composed of a pair of beam bodies which are horizontally arranged and are parallel to each other, and an upper sliding rail and a lower sliding rail are respectively arranged at the top and the bottom of the machine body along the length direction; the support device comprises a first support leg and a second support leg, wherein the first support leg and the second support leg are arranged in the same structure and are respectively provided with a support frame, and the bottom of each support frame is connected with a support oil cylinder which stretches downwards; the longitudinal walking oil cylinder is arranged in parallel with the extending direction of the machine body; the overhead traveling crane is used for suspending and twisting operation. The mechanism adopts the innovative technology of supporting leg crossing type conversion and matched walking type longitudinal movement, a first supporting leg or a second supporting leg is directly crossed to a previous crossing capping beam, and then a longitudinal moving oil cylinder is matched with a lower sliding rail to realize the longitudinal movement task of the bridge girder erection machine.
Description
Technical Field
The invention relates to the technical field of bridge girder erection machines, in particular to a striding type conversion supporting leg for longitudinal movement of a walking type bridge girder erection machine.
Background
In the process of longitudinally moving and crossing, firstly, a front lifting crown block and a rear lifting crown block move above a middle jacking supporting leg, and the front supporting leg, the middle jacking supporting leg and the rear jacking supporting leg jack up a main beam; then, the hoisting overhead traveling crane hoists the rear bracket to move to the position near the middle jacking supporting leg, then the front supporting leg, the middle jacking supporting leg and the rear jacking supporting leg are retracted, the middle bracket and the rear bracket are in a stressed state, then the front hoisting overhead traveling crane and the rear hoisting overhead traveling crane move to the position near the rear jacking supporting leg, the middle jacking supporting leg and the rear bracket supporting roller are started to push the main beam to move forwards, the rear jacking supporting leg moves to the position near the rear bracket, the front supporting leg is correctly dropped on the front cover beam by repeating the first two steps, finally the front supporting leg, the middle jacking supporting leg and the rear jacking supporting leg are put down to be in a stressed state, and the front hoisting overhead traveling crane and the rear hoisting overhead traveling crane move to the position near. However, in such an over-span operation, the support legs of the bridge girder erection machine need to be erected, disassembled and changed in position for many times, so that the operation difficulty is increased invisibly for a huge bridge girder erection machine, the danger coefficient is increased, and the operation time is also prolonged.
Disclosure of Invention
The invention provides a striding type conversion supporting leg for longitudinal movement of a walking type bridge girder erection machine, which is used for solving various defects in a striding process of the traditional bridge girder erection machine in the technical background.
In order to achieve the purpose, the invention provides the following technical scheme: a striding type conversion supporting leg for the longitudinal movement of a walking type bridge girder erection machine mainly comprises: the device comprises a machine body, a first connecting piece and a second connecting piece, wherein the machine body is composed of a pair of beam bodies which are horizontally arranged and are parallel to each other, and an upper sliding rail and a lower sliding rail are respectively arranged at the top and the bottom of the machine body along the length direction; the bottoms of the two ends of the machine body are respectively provided with a front supporting leg and a rear supporting leg; the support device comprises a first support leg and a second support leg, wherein the first support leg and the second support leg are arranged in the same structure and are respectively provided with a support frame, and the support frames are of rectangular frame structures which are horizontally arranged; the long axis direction of the support frame is perpendicular to the extension direction of the machine body, and the dimension of the short axis direction of the support frame is smaller than the gap between the beam bodies; the top of each support frame is matched with a lower sliding rail at the bottom of the machine body through a separating sliding mechanism and is used for the first support leg and the second support leg to reciprocate along the length direction of the machine body; the bottom of each support frame is connected with a support oil cylinder which stretches downwards; the longitudinal walking oil cylinder is arranged in parallel with the extending direction of the machine body, the fixed end of the longitudinal walking oil cylinder is connected with the supporting frame, and the telescopic end of the longitudinal walking oil cylinder is connected with the lower sliding rail through a clamping block; the overhead traveling crane, the overhead traveling crane sets up the fuselage top to through last translation mechanism with go up the cooperation of slide rail, the overhead traveling crane is in two of fuselage be equipped with the hoist between the roof beam body, the hoist is equipped with rotary mechanism for suspend in midair and twist reverse the operation.
Preferably, the rotating mechanism consists of an upper member and a lower member, the upper member is connected with a movable pulley block of the crane and is suspended on the overhead traveling crane, the upper member is provided with a rotating motor, and an output shaft of the rotating motor vertically extends downwards; the bottom of the lower component is provided with a hook, and the top of the lower component is rigidly connected with the output shaft of the rotary motor; the top of the support frame is connected with a hanging ring matched with the hook.
Preferably, the control device comprises a hydraulic system, the hydraulic system comprises a hydraulic pump, a first control valve and a second control valve, the input ends of the first control valve and the second control valve are communicated with the output end of the hydraulic pump through a high-pressure oil pipe, the control end of the first control valve is communicated with an oil pipe interface of the supporting oil cylinder, and the output end of the second control valve is communicated with an oil pipe interface of the longitudinal walking oil cylinder through a high-pressure oil pipe.
Preferably, the control device further comprises an electric control system, the electric control system comprises a power supply, a first switch, a second switch and a third switch, the driving motor of the upper translation mechanism is electrically connected with the power supply through the first switch, the motor of the crane is electrically connected with the power supply through the second switch, and the rotating motor is electrically connected with the power supply through the third switch.
Preferably, the lower slide rail is arranged at the bottom of two opposite outer side walls of the beam body and protrudes towards opposite directions; the separation sliding mechanism comprises a supporting platform which is arranged on the top of the supporting frame and corresponds to the two lower sliding rails, a pair of clamping grooves with openings opened horizontally to the outside are formed in the middle of the supporting platform, the clamping grooves are matched with the lower sliding rails, and the length of each clamping groove is smaller than two gaps of the lower sliding rails.
Preferably, the walking type longitudinal moving crossing method of the bridge girder erection machine mainly comprises the following steps:
the method comprises the following steps that firstly, the load of the machine body is transferred to the rear supporting leg by controlling the supporting oil cylinder, and the first supporting leg is emptied;
placing the rotating mechanism on a support frame of the first support leg through the crown block, matching a hanging ring of the support frame with a hook of the rotating mechanism, grabbing and connecting a fixed frame at the bottom, and hoisting the first support leg through a crane;
translating the first support leg towards the direction far away from the rear support leg through a crane, rotating the first support leg by 90 degrees through the rotating mechanism, and lifting the first support leg to a gap between two groups of beam bodies of the machine body through the crane again;
conveying the first leg to the position above a cut-off beam installed on a target pier through an overhead travelling crane, enabling the clamping groove of the first leg to correspond to the lower sliding rail through a crane, and enabling the first leg to rotate 90 degrees through a rotating mechanism to enable the clamping groove to be matched with the lower sliding rail;
putting down a support oil cylinder at the bottom of the first support leg to enable the first support leg to replace a front support to bear the load of the bridge girder erection machine;
and step six, assembling the longitudinal walking oil cylinder of the first supporting leg, and enabling the longitudinal walking oil cylinders of the first supporting leg and the second supporting leg to be matched with each other through a control device, so that the machine body longitudinally moves towards the direction of the first supporting leg on the supporting plane of the first supporting leg and the supporting plane of the second supporting leg through a lower sliding rail.
The invention has the beneficial effects that: the mechanism adopts the innovative technology of supporting leg crossing type conversion and matched walking type longitudinal movement, namely, the front supporting leg and the rear supporting leg of the bridge girder erection machine are adopted for temporary support, the first supporting leg or the second supporting leg is directly crossed to a front crossing cover beam, and then the longitudinal movement task of the bridge girder erection machine is realized by matching a longitudinal walking oil cylinder with a lower sliding rail, so that the times of dismounting and mounting of the supporting legs are reduced, the longitudinal movement crossing efficiency is improved, and a safe bridge girder erection machine crossing mode is formed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of the overall arrangement of the present invention;
FIG. 2 is a schematic view of a first leg structure of the present invention;
FIG. 3 is a side view of a first leg structure of the present invention;
FIG. 4 is a schematic view of a longitudinal movement through the step of the present invention;
FIG. 5 is a schematic illustration of the step of beam splicing at the stage of the present invention;
FIG. 6 is a schematic view of a segmented beam of the present invention in place;
FIG. 7 is a schematic diagram of a bridge span completion state of the present invention;
FIG. 8 is a schematic diagram of rear leg set-up and first and second leg transposition according to the present invention;
FIG. 9 is a schematic view of the bridge girder erection machine of the present invention moved longitudinally past its position;
fig. 10 is a schematic view of the front leg assembly of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
referring to fig. 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10, a straddle-type conversion leg for the longitudinal movement of a walking bridge girder erection machine mainly comprises: the device comprises a machine body 1, wherein the machine body 1 is composed of a pair of beam bodies which are horizontally arranged and are parallel to each other, and an upper slide rail 3 and a lower slide rail 4 are respectively arranged at the top and the bottom of the machine body 1 along the length direction; the bottoms of the two ends of the machine body 1 are respectively provided with a front supporting leg and a rear supporting leg; the support device comprises a first support leg 7 and a second support leg 8, wherein the first support leg 7 and the second support leg 8 are arranged in the same structure and are respectively provided with a support frame 9, and the support frames 9 are rectangular frame structures which are horizontally arranged; the long axis direction of the support frame 9 is perpendicular to the extension direction of the machine body 1, and the dimension of the support frame 9 in the short axis direction is smaller than the gap between the beam bodies; the top of each support frame 9 is matched with the lower slide rail 4 at the bottom of the machine body 1 through a separate slide mechanism, and the support frames are used for enabling the first support leg 7 and the second support leg 8 to move back and forth along the length direction of the machine body 1; the bottom of each support frame 9 is connected with a support oil cylinder 10 which stretches downwards; the longitudinal walking oil cylinder 11 is arranged in parallel with the extending direction of the machine body 1, the fixed end of the longitudinal walking oil cylinder 11 is connected with the supporting frame 9, and the telescopic end is connected with the lower slide rail 4 through a clamping block 12; overhead traveling crane 13, overhead traveling crane 13 sets up 1 top of fuselage to through last translation mechanism with go up the cooperation of slide rail 3, overhead traveling crane 13 is in two of fuselage 1 be equipped with hoist 14 between the roof beam body, hoist 14 is equipped with rotary mechanism 15 for suspend in midair and twist reverse the operation.
In the above arrangement, the bridge girder erection machine longitudinally spans the first pier 41, the second pier 42 and the third pier 43, the first leg 7 is supported above the first pier, the second leg 8 is supported above the second pier, the front leg is supported on one side of the third pier far away from the second pier 42, the rear leg 6 is supported on the completed bridge body breadth, and after the assembling operation of the bridge span 45 between the first pier 41 and the second pier 42 is completed, the bridge girder erection machine longitudinally moves in the direction of the front leg 5 to pass through the span operation, according to the above arrangement, the following steps are adopted:
step one, establishing a rear supporting leg 6 on a mounted bridge span 45, carrying the load at the rear part of a bridge girder erection machine, and simultaneously emptying the first supporting leg 7; transferring the load of the machine body 1 to the rear supporting leg by controlling the supporting oil cylinder 10, and emptying the first supporting leg 7;
placing the rotating mechanism 15 on the support frame 9 of the first support leg 7 through the crown block 13, matching the hanging ring of the support frame 9 with the hook of the rotating mechanism 15, grabbing and connecting a fixed frame at the bottom, and hoisting the first support leg 7 through the crane 14;
thirdly, the first supporting leg 7 is translated towards the direction far away from the rear supporting leg through the crane 14, the first supporting leg 7 is rotated by 90 degrees through the rotating mechanism 15, and the first supporting leg 7 is lifted to a gap between two groups of beam bodies of the fuselage through the crane 14 again;
step four, the first leg 7 is conveyed to a target pier along the direction of an arrow 33 by the crown block 13, namely, the position above a cut beam on which a fourth pier 44 is installed, the clamping groove 30 of the first leg 7 corresponds to the lower slide rail 4 by the crane 14, and the first leg 7 is rotated by 90 degrees by the rotating mechanism 15, so that the clamping groove 30 is matched with the lower slide rail 4;
fifthly, lowering the support oil cylinder 10 at the bottom of the first support leg 7 to enable the first support leg 7 to bear the load of the bridge girder erection machine instead of a front support;
and sixthly, assembling a longitudinal walking oil cylinder 11 of the first supporting leg 7, and enabling the first supporting leg 7 and the longitudinal walking oil cylinder 11 of the second supporting leg 8 to be matched with each other through a control device, so that the machine body longitudinally moves towards the direction of the first supporting leg 7 on the supporting plane of the first supporting leg 7 and the supporting plane of the second supporting leg 8 through the lower sliding rail 4.
Through the steps, after the whole bridge girder erection machine longitudinally moves across the span, the installation of the previous span section girder 40 is completed, and some post-erection supporting legs which are positioned on the new bridge span 45 and are close to the first supporting legs 7 are positioned on the second supporting legs 8, so that the next longitudinal span operation is completed, and then the operation principle of the second supporting legs 8 is the same as the motion principle of the first supporting legs 7. The longitudinal movement is realized by adopting a novel technology of leg crossing type conversion matching walking type longitudinal movement, namely, a front leg and a rear leg of the bridge girder erection machine are adopted for temporary support, the first leg 7 or the second leg 8 is directly crossed to a front crossing cover beam, and then a longitudinal moving oil cylinder 11 is matched with a lower slide rail 4 to realize the longitudinal movement task of the bridge girder erection machine.
Example two:
the rotating mechanism 15 is composed of an upper member and a lower member, the upper member is connected with a movable pulley block of the crane 14 and is suspended on the crown block 13, the upper member is provided with a rotating motor, and an output shaft of the rotating motor vertically extends downwards; the bottom of the lower component is provided with a hook, and the top of the lower component is rigidly connected with the output shaft of the rotary motor; the top of the support frame 9 is connected with a hanging ring matched with the hook.
In the above arrangement, the rotating mechanism 15 is used as a hook of the crane 14, and the suspended object is horizontally adjusted during the hoisting operation by the operation of the rotating motor, and the hook of the lower member and the hanging ring at the top of the supporting frame 9 are arranged in an occupied manner, and the assembly inspection by workers is required in the fixing and unhooking links.
Example three:
the control device comprises a hydraulic system, the hydraulic system comprises a hydraulic pump, a first control valve and a second control valve, the input ends of the first control valve and the second control valve are communicated with the output end of the hydraulic pump through a high-pressure oil pipe, the control end of the first control valve is communicated with an oil pipe interface of the supporting oil cylinder 10, and the output end of the second control valve is communicated with an oil pipe interface of the longitudinal traveling oil cylinder 11 through a high-pressure oil pipe.
In the above arrangement, the first control valve controls the respective support cylinders 10 of the first support leg 7 and the second support leg 8 for fine adjustment of lifting and load transfer of the whole bridge erecting machine, and the second control valve controls the longitudinal traveling cylinder 11 for moving tasks of the first support leg 7 and the second support leg 8 on the lower slide rail 4 and longitudinally moving the machine body 1 on the first support leg 7 and the second support leg 8.
Example four:
the control device further comprises an electric control system, the electric control system comprises a power supply, a first switch, a second switch and a third switch, a driving motor of the upper translation mechanism is electrically connected with the power supply through the first switch, a motor of the crane 14 is electrically connected with the power supply through the second switch, and a rotating motor is electrically connected with the power supply through the third switch.
In the above arrangement, the first switch controls the upper translation mechanism to move the crown block 13 above the body 1, the second switch controls the crane 14 to enable the rotation mechanism 15 to perform lifting operation, and the third switch controls the rotation motor to adjust the rotation angle of the rotation mechanism 15 during lifting operation regardless of the first support leg 7, the second support leg 8 or the box girder bridge section.
Example five:
the lower slide rails 4 are arranged at the bottoms of two opposite outer side walls of the beam body and protrude towards opposite directions; the separating sliding mechanism comprises two supporting platforms 29 which are arranged at the top of the supporting frame 9 and correspond to the lower sliding rails 4, a pair of clamping grooves 30 with openings opened horizontally to the outside are formed in the middle of each supporting platform 29, the clamping grooves 30 are matched with the lower sliding rails 4, and the length of each clamping groove 30 is smaller than two gaps between the lower sliding rails 4.
Through the above setting, first landing leg 7 and second landing leg 8 pass through draw-in groove 30 constraint on slide rail 4 down, limited with slide rail 4's cooperation relation down, when carrying out 90 degrees rotations to first landing leg 7 or second landing leg 8, thereby draw-in groove 30 breaks away from the constraint of slide rail 4 down along with the rotation of support frame 9 and makes first landing leg 7 or second landing leg 8 break away from the constraint of slide rail 4 down and hoisted, there is the size to set up, first landing leg 7 or second landing leg 8 can be smooth carry out free movement between the gap at fuselage 1 central authorities, thereby avoided the interference with preceding landing leg or back landing leg.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (2)
1. A striding type conversion supporting leg for longitudinal movement of a walking type bridge girder erection machine is characterized by comprising:
the device comprises a machine body, a first connecting piece and a second connecting piece, wherein the machine body is composed of a pair of beam bodies which are horizontally arranged and are parallel to each other, and an upper sliding rail and a lower sliding rail are respectively arranged at the top and the bottom of the machine body along the length direction; the bottoms of the two ends of the machine body are respectively provided with a front supporting leg and a rear supporting leg;
the support device comprises a first support leg and a second support leg, wherein the first support leg and the second support leg are arranged in the same structure and are respectively provided with a support frame, and the support frames are of rectangular frame structures which are horizontally arranged; the long axis direction of the support frame is perpendicular to the extension direction of the machine body, and the dimension of the short axis direction of the support frame is smaller than the gap between the beam bodies; the top of each support frame is matched with a lower sliding rail at the bottom of the machine body through a separating sliding mechanism and is used for the first support leg and the second support leg to reciprocate along the length direction of the machine body; the bottom of each support frame is connected with a support oil cylinder which stretches downwards;
the longitudinal walking oil cylinder is arranged in parallel with the extending direction of the machine body, the fixed end of the longitudinal walking oil cylinder is connected with the supporting frame, and the telescopic end of the longitudinal walking oil cylinder is connected with the lower sliding rail through a clamping block;
the crane is arranged between the two beam bodies of the machine body and is provided with a rotating mechanism for suspending and twisting operation;
the rotating mechanism consists of an upper component and a lower component, the upper component is connected with a movable pulley block of the crane and is suspended on the overhead traveling crane, the upper component is provided with a rotating motor, and an output shaft of the rotating motor vertically extends downwards; the bottom of the lower component is provided with a hook, and the top of the lower component is rigidly connected with the output shaft of the rotary motor; the top of the support frame is connected with a hanging ring matched with the hook;
the control device comprises a hydraulic system, the hydraulic system comprises a hydraulic pump, a first control valve and a second control valve, the input ends of the first control valve and the second control valve are communicated with the output end of the hydraulic pump through a high-pressure oil pipe, the control end of the first control valve is communicated with an oil pipe interface of the supporting oil cylinder, and the output end of the second control valve is communicated with an oil pipe interface of the longitudinal traveling oil cylinder through a high-pressure oil pipe;
the control device further comprises an electric control system, the electric control system comprises a power supply, a first switch, a second switch and a third switch, a driving motor of the upper translation mechanism is electrically connected with the power supply through the first switch, a motor of the crane is electrically connected with the power supply through the second switch, and a rotating motor is electrically connected with the power supply through the third switch;
the lower sliding rails are arranged at the bottoms of the two opposite outer side walls of the beam body and protrude towards opposite directions; the separation sliding mechanism comprises a supporting platform which is arranged on the top of the supporting frame and corresponds to the two lower sliding rails, a pair of clamping grooves with openings opened horizontally to the outside are formed in the middle of the supporting platform, the clamping grooves are matched with the lower sliding rails, and the length of each clamping groove is smaller than two gaps of the lower sliding rails.
2. A walking type longitudinal moving and crossing method of a bridge girder erection machine, which is applied to the crossing type conversion supporting leg for the longitudinal moving of the walking type bridge girder erection machine in claim 1, and is characterized by comprising the following steps:
the method comprises the following steps that firstly, the load of the machine body is transferred to the rear supporting leg by controlling the supporting oil cylinder, and the first supporting leg is emptied;
placing the rotating mechanism on a support frame of the first supporting leg through the crown block, and matching the hanging ring of the support frame with a hook of the rotating mechanism; the bottom of the bracket is connected with a fixed frame in a grabbing manner, and the first support leg is lifted by a crane;
translating the first support leg towards the direction far away from the rear support leg through a crane, rotating the first support leg by 90 degrees through the rotating mechanism, and lifting the first support leg to a gap between two groups of beam bodies of the machine body through the crane again;
conveying the first leg to the position above a cut-off beam installed on a target pier through an overhead travelling crane, enabling the clamping groove of the first leg to correspond to the lower sliding rail through a crane, and enabling the first leg to rotate 90 degrees through a rotating mechanism to enable the clamping groove to be matched with the lower sliding rail;
putting down a support oil cylinder at the bottom of the first support leg to enable the first support leg to replace a front support to bear the load of the bridge girder erection machine;
and step six, assembling the longitudinal walking oil cylinder of the first supporting leg, and enabling the longitudinal walking oil cylinders of the first supporting leg and the second supporting leg to be matched with each other through a control device, so that the machine body longitudinally moves towards the direction of the first supporting leg on the supporting plane of the first supporting leg and the supporting plane of the second supporting leg through a lower sliding rail.
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| CN201910639089.9A CN110258347B (en) | 2019-07-16 | 2019-07-16 | Crossing type conversion supporting leg for longitudinal movement of walking type bridge girder erection machine |
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| CN201910639089.9A CN110258347B (en) | 2019-07-16 | 2019-07-16 | Crossing type conversion supporting leg for longitudinal movement of walking type bridge girder erection machine |
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| CN110258347B true CN110258347B (en) | 2021-06-18 |
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| CN205474867U (en) * | 2016-03-31 | 2016-08-17 | 武汉通联路桥机械技术有限公司 | Single -spar construction frame bridge crane |
| CN206015529U (en) * | 2016-08-17 | 2017-03-15 | 中铁二十局集团第三工程有限公司 | Based on Bridge Erector across both wired bridge hoisting systems |
| WO2018016850A1 (en) * | 2016-07-20 | 2018-01-25 | 박정자 | Rail car for conveying precast slab, moving on bridge girder, and bridge precast slab construction method using same |
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2019
- 2019-07-16 CN CN201910639089.9A patent/CN110258347B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201065511Y (en) * | 2007-02-14 | 2008-05-28 | 广东省长大公路工程有限公司 | Mobile die carrier bridge fabrication machine for thin wall high frusta |
| CN201195822Y (en) * | 2008-05-30 | 2009-02-18 | 郑州大方桥梁机械有限公司 | Propel machine of city rail traffic erecting machine of bridge span capable of walking in S shaped line |
| CN104805773A (en) * | 2015-05-15 | 2015-07-29 | 武汉通联机器科工有限公司 | Segmental assembled bridge girder erection machine for construction of small curved bridge |
| CN205474867U (en) * | 2016-03-31 | 2016-08-17 | 武汉通联路桥机械技术有限公司 | Single -spar construction frame bridge crane |
| WO2018016850A1 (en) * | 2016-07-20 | 2018-01-25 | 박정자 | Rail car for conveying precast slab, moving on bridge girder, and bridge precast slab construction method using same |
| CN206015529U (en) * | 2016-08-17 | 2017-03-15 | 中铁二十局集团第三工程有限公司 | Based on Bridge Erector across both wired bridge hoisting systems |
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