A self-propelled hanging frame platform for steel box arch construction

Abstract

The application provides a self-propelled hanging frame platform for steel box arch construction, which comprises a movable hanging frame body arranged on an existing steel box arch structure, the hanging frame body being provided with a working frame, a connecting top frame and a walking inclined frame. Two working frames are symmetrically arranged on both sides of the existing steel box arch structure, and a working platform is arranged in the working frame. The connecting top frame is arranged above the existing steel box arch structure and connects the two working frames. The walking inclined frame is arranged above the existing steel box arch structure and below the connecting top frame, and a walking gear is arranged in the walking inclined frame. Two rack-shaped walking tracks are symmetrically arranged on both sides of the top surface of the existing steel box arch structure, the walking gear is in mesh with the walking tracks, and the walking gear rolls and moves along the walking tracks. The walking gear is provided with a gear locking device, and the walking gear can be stopped from rolling through the gear locking device. The application can realize the free movement and locking of the working platform during the aerial work of the steel box arch structure, improves the construction efficiency, and has superior safety performance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel box arch bridge arch rib construction equipment, in particular to a self-propelled hanging frame platform for steel box arch construction. BACKGROUND

[0002] When performing high-altitude operations such as assembly and welding between segments of the arch rib of an existing steel box arch bridge, rust removal and polishing, corrosion protection coating, and post-operation maintenance, a special climbing vehicle is generally used to lift workers from the ground to a designated work point to achieve the need for construction work. However, when using the climbing vehicle to perform the above operations, the following problems exist: 1. When performing construction work, the climbing vehicle is difficult to completely cover the construction surface due to the limitations of its own position and lifting arm and the surrounding environment, which brings certain difficulties to welding and rust prevention operations; 2. There are no reliable wind and rain protection measures for high-altitude steel structure welding, which directly affects the quality of gas shielded welding; 3. The work surface of one-time construction for operations such as rust removal and polishing and corrosion protection coating is small, and the climbing vehicle needs to be moved and lifted repeatedly to achieve the work, resulting in low construction efficiency; 4. The work platform at the front end of the climbing vehicle is often small and can only carry 2 people at a time, which limits the work conditions.

[0003] There is another construction method. For example, a steel box arch bridge segment high-altitude installation and welding operation platform is disclosed in Chinese Patent No. 202220490220.7, which includes a platform body and supports arranged on both sides of the platform body. The platform body is arranged on the supports on both sides. In use, the supports on both sides are distributed on both sides of the steel box arch bridge segment to be welded, thereby facilitating workers to perform construction. After the welding at the specified height is completed, the position of the operation platform is adjusted by moving the supports until the welding of the steel box arch bridge segment is completed. The existing steel box arch bridge segment high-altitude installation and welding operation platform does not have wheels or other devices that facilitate movement, and should rely on hoisting to adjust the position of the operation platform, which is very inconvenient and results in low construction efficiency. Therefore, it is necessary to improve it. SUMMARY

[0004] The purpose of the present application is to provide a self-propelled hanging frame platform for steel box arch construction, which can achieve free movement and locking of the operation platform during high-altitude operation of the steel box arch structure, improve construction efficiency, and has superior safety performance.

[0005] The purpose of the present application can be achieved by the following technical solutions:

[0006] A self-propelled hanging frame platform for steel box arch construction includes a movable hanging frame body arranged on an existing steel box arch structure, the hanging frame body having a work frame, a connecting top frame, and a walking inclined frame.

[0007] 2 work frames are symmetrically arranged on both sides of the existing steel box arch structure, the work frame is a vertical frame structure composed of 4 vertical rods, and a plurality of horizontal rods and longitudinal rods arranged between the vertical rods, and 2 horizontal rods and 2 longitudinal rods at the bottom of the work frame form a rectangular work platform frame, a plurality of reinforcing rods are arranged between the 2 horizontal rods or between the 2 longitudinal rods in the work platform frame, and a work platform is arranged on the work platform frame.

[0008] A connecting top frame is arranged above the existing steel box arch structure, and has a plurality of long longitudinal rods arranged in parallel, and the top portions of the 2 work frames are connected by the long longitudinal rods.

[0009] A walking inclined frame is arranged above the existing steel box arch structure and below the connecting top frame, and has a longitudinal front beam rod and a longitudinal rear beam rod arranged in parallel, the longitudinal front beam rod is higher than the longitudinal rear beam rod, and the two are connected by a plurality of inclined pull rods to form a walking inclined frame, the upper front ends of the 2 work frames are connected by the longitudinal front beam rod, and the upper rear ends are connected by the longitudinal rear beam rod, walking gears are arranged on the longitudinal front beam rod and the longitudinal rear beam rod corresponding to the upper sides of both sides of the existing steel box arch structure through gear mounting seats, and both sides of the top surface of the existing steel box arch structure have 2 symmetrical toothed walking tracks, the walking gears and the walking tracks are in meshing engagement, so that the walking gears roll and move along the walking tracks; the walking gears are provided with gear locking devices, and the walking gears can be stopped from rolling by the gear locking devices.

[0010] The gear locking device comprises a locking baffle, the locking baffle is movably arranged on the gear mounting seat, and can be clamped between two adjacent teeth of the walking gear, so as to stop the walking gear from rolling. The locking baffles of the 2 gear locking devices on the longitudinal front beam rod and / or the longitudinal rear beam rod are synchronously connected by a connecting rod, both ends of the connecting rod are close to the 2 work frames and are movably provided with connecting rod guide seats, and the connecting rod guide seats are fixedly arranged on the longitudinal front beam rod and / or the longitudinal rear beam rod, and the locking baffles of the 2 gear locking devices can be synchronously clamped on the 2 walking gears by moving the connecting rod.

[0011] Preferably, the connecting rod guide seat has a guide groove corresponding to the connecting rod on the top, the connecting rod passes through the guide groove to achieve movable installation with the connecting rod guide seat; the top of the connecting rod guide seat has a vertical threaded hole communicating with the guide groove and is provided with a locking bolt, and rotating the locking bolt can make it tightly press on the connecting rod.

[0012] Preferably, the connecting rod has a stop head on both sides of the connecting rod guide seat.

[0013] Preferably, the lower part of the two operation frames is respectively provided with a plurality of jacking screws near the side of the existing steel box arch structure, the jacking screws are longitudinally arranged, one end of the jacking screws is aligned with the side of the existing steel box arch structure, the other end of the jacking screws is movably arranged through the vertical rod or the horizontal rod of the operation frame and is connected with the vertical rod or the horizontal rod through screw thread, and rotating the jacking screw can make it tightly press on the side of the existing steel box arch structure.

[0014] Preferably, the jacking screw has a jacking head with an enlarged outer diameter at the end aligned with the existing steel box arch structure.

[0015] Preferably, a rectangular passageway platform frame is formed between the two long longitudinal rods at the front end of the connecting top frame, a plurality of horizontal rods are arranged between the two long longitudinal rods in the passageway platform frame, and a passageway platform is arranged on the passageway platform frame, two passage openings are reserved at the two ends of the passageway platform, the passageway platform and the two passage openings form a walking channel connecting the two operation frames, and a guardrail is arranged around the walking channel on the connecting top frame.

[0016] Preferably, a vertical passageway derrick is further arranged below the passageway opening in the operation frame, the passageway derrick has four vertical rods, the top end of the vertical rod is connected with the passageway platform frame, and the bottom end of the vertical rod is connected with the operation platform frame, and a passageway well is formed in the passageway derrick to connect the passageway platform and the operation platform.

[0017] Preferably, a rectangular rest platform frame is further arranged in the middle of the passageway derrick, and a rest platform is arranged on the rest platform frame.

[0018] The present application has the following outstanding essential features and significant progress:

[0019] 1. The self-propelled hanging frame platform for steel box arch construction provided by the present application comprises two operation frames arranged symmetrically on both sides of the existing steel box arch structure, the two operation frames are connected through a connecting top frame, and an operation platform is arranged in the operation frame to provide a large space and high safety operation construction site for construction personnel, further, the walking gear on the walking inclined frame can roll along the walking track on the existing steel box arch structure, and the walking gear can be stopped from rolling through the gear locking device, so that the movement of the self-propelled hanging frame platform is flexible and simple, and the reverse movement is avoided, the high-altitude operation is safe and stable, and the construction efficiency is improved.

[0020] 2. The self-propelled hanging frame platform for steel box arch construction provided by the present application synchronously connects the locking flaps of the two gear locking devices through a connecting rod, so that the locking flaps of the two gear locking devices can be synchronously clamped on the two walking gears, the left and right walking inclined frames are kept balanced, the overall stability of the hanging frame body is enhanced, and the locking and unlocking steps of the gear locking device are simplified, and the use is easy.

[0021] 3. The self-propelled hanging platform for steel box arch construction provided by the present invention has multiple tightening screws respectively provided on the side of the lower part of the two working frames near the existing steel box arch structure, and the tightening screws have tightening heads with enlarged outer diameter, which increases the contact area between the tightening screws and the side of the existing steel box arch structure, thereby improving the connection stability between the hanging frame body and the existing steel box arch structure 1.

[0022] 4. The self-propelled hanging platform for steel box arch construction provided by the present invention, by installing a rest platform in the passageway derrick within the working frame, avoids excessive fatigue of construction personnel during high-altitude operations, improves the comfort of construction personnel during high-altitude operations, and further ensures construction safety. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a self-propelled hanging platform for steel box arch construction, which is suspended on an existing steel box arch structure, as provided by the present invention.

[0024] Figure 2 This is a structural schematic diagram of a self-propelled hanging platform for steel box arch construction provided by the present invention.

[0025] Figures 3a to 3e This invention provides a schematic diagram illustrating the changes in the working state of gear locking and unlocking in a self-propelled hanging platform for steel box arch construction. Figure 3a and Figure 3b Corresponding to the locked state, Figure 3c For the unlocking process, Figure 3d and Figure 3e Corresponding unlock status.

[0026] Figure 4 This is a structural schematic diagram of a second embodiment of a self-propelled hanging platform for steel box arch construction provided by the present invention.

[0027] Figure 5 This is a schematic diagram (locked state) of the gear locking device in the second embodiment of a self-propelled hanging platform for steel box arch construction provided by the present invention.

[0028] Figure 6 This is a schematic diagram of the gear locking device (unlocked state) in the second embodiment of a self-propelled hanging platform for steel box arch construction provided by the present invention.

[0029] Figure 7 This is a partial structural diagram of the gear locking device in a second embodiment of a self-propelled hanging platform for steel box arch construction provided by the present invention. Detailed Implementation

[0030] The invention will now be further described with reference to the accompanying drawings. Example

[0031] As Figure 1 and Figure 2 The self-propelled hanging frame platform for steel box arch construction comprises a movable hanging frame body arranged on the existing steel box arch structure 1, the hanging frame body has a working frame 2, a connecting top frame 3 and a walking inclined frame 4, the shape of the hanging frame body is similar to a shoulder pole, and the hanging frame body can be hung on the existing steel box arch structure 1 to realize various operations for the construction of the existing steel box arch structure 1. Each rod of the working frame 2, the connecting top frame 3 and the walking inclined frame 4 of the hanging frame body is made of round steel, and can also be made of profiled steel such as I-beam, square steel and L-shaped angle steel. The specific structure is as follows:

[0032] Two independent working frames 2 are symmetrically arranged on both sides of the existing steel box arch structure 1, each working frame 2 comprises four vertical rods 20, and a plurality of horizontal rods 21 and a plurality of longitudinal rods 22 arranged between the vertical rods 20 to form a vertical frame structure. Two horizontal rods 21 and two longitudinal rods 22 at the bottom of the working frame 2 form a rectangular working platform frame 23, a plurality of reinforcing rods 24 are arranged between the two horizontal rods 21 or between the two longitudinal rods 22 in the working platform frame 23, and a working platform is arranged in the working platform frame 23, and the construction personnel of the existing steel box arch structure 1 work on the working platform. The working platform has a large construction space and is safe and reliable, and is convenient for the construction personnel to carry out various high-altitude operations.

[0033] The connecting top frame 3 is arranged above the existing steel box arch structure 1, has a plurality of parallel long longitudinal rods 30, and the top portions of the two working frames 2 are connected by the long longitudinal rods 30. Two long longitudinal rods 30 at the front end of the connecting top frame 3 form a rectangular passageway platform frame 31, a plurality of transverse rods 32 are arranged between the two long longitudinal rods 30 in the passageway platform frame 31, and a passageway platform is arranged in the passageway platform frame 31. Two passageway openings 33 are reserved at both ends of the passageway platform, the passageway platform and the two passageway openings 33 form a walking passageway connecting the two working frames 2, and a guardrail 34 is arranged around the walking passageway on the connecting top frame 3. The construction personnel can walk on the walking passageway to cross above the steel box arch structure 1, and the guardrail 34 on the walking passageway further improves the safety factor of the high-altitude operation of the construction personnel.

[0034] A vertically arranged access shaft is also provided below the access entrance 33 inside the work frame 2. This access shaft has four vertical rods 25. The top of each vertical rod 25 connects to the passageway platform frame 31, and the bottom of each vertical rod 25 connects to the work platform frame 23, forming a passageway shaft connecting the passageway platform and the work platform. Construction workers can enter the access shaft from the work platform located on one side of the existing steel box arch structure 1, and then enter the walking passage from the access entrance 33. From there, they can ascend to the work platform located on the other side of the existing steel box arch structure 1 to continue construction. In some examples, the exterior facade of the main frame is also equipped with a windproof curtain (not shown in the figure), and the top of the main frame is fitted with a rainproof roof (not shown in the figure), serving as wind and rain protection. In some examples, a rectangular rest platform frame 26 is also provided in the middle of the access shaft, on which a rest platform is installed. Construction workers can take a short rest on the rest platform when needed during construction.

[0035] Multiple tightening screws 27 are respectively provided on the lower part of the two working frames 2 near the side of the existing steel box arch structure 1. The tightening screws 27 are arranged longitudinally, with one end facing the side of the existing steel box arch structure 1, and the other end passing through the vertical rod 20 or horizontal rod 21 of the working frame 2 and connected to the vertical rod 20 or horizontal rod 21 by a thread. Rotating the tightening screw 27 can make it press tightly against the side of the existing steel box arch structure 1, thereby improving the stability between the main body of the hanging frame and the existing steel box arch structure 1. The end of the tightening screw 27 facing the existing steel box arch structure 1 has a tightening head 28 with an enlarged outer diameter, which increases the contact area of ​​the tightening screw 27 pressing against the side of the existing steel box arch structure 1, further improving the stability between the main body of the hanging frame and the existing steel box arch structure 1.

[0036] The walking inclined frame 4 is arranged above the existing steel box arch structure 1 and below the connecting top frame 3, and has longitudinally arranged front beam rods 40 and rear beam rods 41, the front beam rods 40 are higher than the rear beam rods 41, and the front beam rods 40 and the rear beam rods 41 are connected by a plurality of inclined rods 42 to form the walking inclined frame 4. The upper front ends of the two working frames 2 are connected by the front beam rods 40, and the upper rear ends of the two working frames 2 are connected by the rear beam rods 41. The walking gears 44 are arranged on the front beam rods 40 and the rear beam rods 41 corresponding to the upper sides of the existing steel box arch structure 1 through the gear mounting seats 43, the existing steel box arch structure 1 has two symmetrical rack-shaped walking tracks 10 on the top surface, the walking tracks 10 are welded or embedded on the existing steel box arch structure 1, the walking gears 44 and the walking tracks 10 are in meshing relationship, so that the walking gears 44 roll along the walking tracks 10, and thus the hanging frame body can move on the existing steel box arch structure 1. The hanging frame body can move forward along the walking tracks 10 under the action of power, so that the hanging frame body can be moved flexibly in the segmented construction of the existing steel box arch structure 1, and the overall construction efficiency is improved.

[0037] The walking gears 44 are provided with gear locking devices for preventing the hanging frame body from moving backward on the walking tracks 10. The gear locking devices include locking baffle plates 440 movably arranged on the gear mounting seats 43, the locking baffle plates 440 can be clamped between two adjacent teeth of the walking gears 44, so that the walking gears 44 stop rolling. Two locking baffle plates 440 are arranged in each gear locking device, and the two locking baffle plates 440 are arranged at the front end of the walking gears 44 and the rear end of the walking gears 44 respectively. The two locking baffle plates 440 are connected by a connecting screw 45 movably penetrating the gear mounting seat 43, and the connecting screw 45 is provided with locking nuts 46 outside the gear mounting seat 43, and the locking nuts 46 are rotated to lock the connecting screw 45 on the gear mounting seat 43. The locking nuts 46 include two locking nuts 46 corresponding to the two locking baffle plates 440, so that the two locking nuts 46 are rotated to lock the connecting screw 45 on the gear mounting seat 43 from both ends, so that the two locking baffle plates 440 are tightly connected with the gear mounting seat 43.

[0038] As Figure 3a and Figure 3bIn the locking state of the gear locking device shown in the figure, the two locking blocks 440 are clamped between two adjacent teeth on the walking gear 44, so that the walking gear 44 cannot continue to move forward and backward on the walking track 10 of the existing steel box arch structure 1, and the side of the existing steel box arch structure 1 is pressed tightly by the pressing head 28 of the pressing screw 27, so that the two working racks 2 located on both sides of the existing steel box arch structure 1 are tightly attached to the side of the existing steel box arch structure 1, and the stability is strong.

[0039] As shown in Figure 3d and Figure 3e , the unlocking state of the gear locking device, the two locking blocks 440 are not in contact with the teeth on the walking gear 44, and the locking blocks 440 will not produce any resistance to the forward and backward movement of the walking gear 44, and there is a gap between the side of the existing steel box arch structure 1 and the pressing head 28 of the pressing screw 27, at this time the working rack 2 can be pushed, so that the walking gear 44 moves forward and backward on the walking track 10 of the existing steel box arch structure 1, and the movement of the hanging rack body is facilitated.

[0040] When the walking gear 44 needs to roll to realize the movement of the hanging rack platform of the application, first unlock the gear locking device, specifically: as shown in Figure 3c , loosen the locking nut 46, so that the locking block 440 can rotate around the loosened connecting screw 45, so that the gear locking device is unlocked. Then turn the locking block 440 to any side to make it away from the walking gear 44, and then tighten the locking nut 46 to lock between the connecting screw 45 and the gear mounting seat 43, so that the gear locking device maintains the unlocked state, as shown in Figure 3d , so that the walking gear 44 can roll on the walking track 10, and the locking block 440 will not produce resistance to its rolling.

[0041] When the walking gear 44 needs to stop rolling to realize the locking of the hanging rack platform of the application, first unlock the gear locking device according to the above steps. Then turn the locking block 440 so that the two locking blocks 440 are clamped between two adjacent teeth on the walking gear 44, and then tighten the locking nut 46 to lock between the connecting screw 45 and the gear mounting seat 43, so that the gear locking device maintains the locked state, as shown in Figure 3a , so that the walking gear 44 cannot roll on the walking track 10, and the locking block 440 produces resistance to its rolling. Embodiment

[0042] The difference between this embodiment and embodiment 1 is that the locking mode of the locking block in the gear locking device is different. As shown in Figure 4As shown, the locking blocks 440 of the two gear locking devices on the longitudinal front beam rod 40 and the longitudinal rear beam rod 41 are synchronously connected through a connecting rod 50, both ends of the connecting rod 50 are close to the two operation frames 2, and both ends of the connecting rod 50 are movably installed with connecting rod guide seats 51, the connecting rod guide seats 51 are fixedly installed on the longitudinal front beam rod 40 and the longitudinal rear beam rod 41, and the two gear locking devices can be synchronously clamped on the two walking gears 44 by moving the connecting rod 50.

[0043] As shown in Figure 7 As shown, the connecting rod guide seats 51 have guide grooves corresponding to the connecting rod 50, the connecting rod 50 passes through the guide grooves to be movably installed with the connecting rod guide seats 51. The connecting rod guide seats 51 have vertical threaded holes communicating with the guide grooves on the top and are installed with locking bolts 52, and rotating the locking bolts 52 can make them tightly press on the connecting rod 50.

[0044] When it is needed to stop the walking gear 44 from rolling to realize the locking of the hanging rack platform of the present application, the gear locking device is first unlocked, specifically, the locking bolts 52 are loosened to make gaps between the connecting rod 50 and the guide grooves, the connecting rod 50 can move transversely along the guide grooves to unlock the gear locking device. Then the connecting rod 50 is pulled transversely to drive the locking blocks 440 to move transversely to the teeth of the walking gear 44 and clamp the walking gear 44, and the locking bolts 52 are tightened to tightly press the connecting rod 50 in the guide grooves, so that Figure 5 the gear locking device shown in the above formula (1) is maintained in the locked state, the walking gear 44 cannot roll on the walking track 10, and the locking blocks 440 generate resistance to the rolling.

[0045] When it is needed to roll the walking gear 44 to realize the movement of the hanging rack platform of the present application, the gear locking device is first unlocked according to the above steps. Then the connecting rod 50 is pulled transversely to drive the locking blocks 440 to move transversely, so that the locking blocks 440 move away from the walking gear 44, and the locking bolts 52 are tightened to tightly press the connecting rod 50 in the guide grooves, so that Figure 6 the gear locking device shown in the above formula (2) is maintained in the unlocked state, the walking gear 44 can roll on the walking track 10, and the locking blocks 440 will not generate resistance to the rolling.

[0046] In some examples, the connecting rod further has blocking heads 53 on both sides of the connecting rod guide seats 51, the blocking heads 53 pass through the guide grooves on the connecting rod guide seats 51 and are above the connecting rod 50, when the connecting rod 50 moves transversely, the blocking heads 53 move synchronously with the connecting rod 50 and limit the movement of the connecting rod 50. When the end of the blocking head 53 close to the walking gear 44 contacts with an outer edge of the connecting rod guide seat 51, the formula (1) shown in Figure 5The locking state of the gear locking device shown in FIG. 5. When the blocking head 53 is in contact with the other outer edge of the connecting rod guide seat 51 away from the end of the walking gear 44, the locking state of the gear locking device shown in FIG. 5 is formed Figure 6 The unlocking state of the gear locking device shown in FIG. 5.

[0047] In the construction of the existing steel box arch structure, the steel box arch construction self-propelled hanging frame platform of the present application is hoisted to the designated position, two working frames are symmetrically located on both sides of the existing steel box arch structure, the construction personnel can work from the working platform located on one side of the existing steel box arch structure, and can enter the working platform located on the other side of the existing steel box arch structure 1 through the walking passage to continue the construction. When the construction of the existing steel box arch structure 1 is completed, the gear locking device is unlocked, the walking inclined frame is pushed, the walking gear 44 rolls on the walking track 10 of the existing steel box arch structure 1, the hanging frame body reaches the position to be constructed, and then the gear locking device is used to lock the walking gear 44, so that the walking gear 44 stops rolling on the walking track 10, thereby realizing the flexible movement of the hanging frame body, improving the construction efficiency, and having high construction safety.

Claims

1. A self-propelled hanging platform for steel box arch construction, comprising a movable hanging body mounted on an existing steel box arch structure, characterized in that, The main body of the hanging frame includes a working frame, a connecting top frame, and a traveling inclined frame; Two work frames are symmetrically arranged on both sides of the existing steel box arch structure. The work frame is a vertical frame structure consisting of four vertical rods, multiple horizontal rods and multiple vertical rods installed between the vertical rods. The two horizontal rods and two vertical rods at the bottom of the work frame form a rectangular work platform frame. There are multiple reinforcing rods between the two horizontal rods or between the two vertical rods in the work platform frame, and the work platform is installed there. The connecting top frame is set above the existing steel box arch structure and has multiple parallel long longitudinal bars. The tops of the two working frames are connected by the long longitudinal bars. The traveling inclined frame is installed above the existing steel box arch structure and below the connecting top frame. It has parallel longitudinal front beams and longitudinal rear beams, with the longitudinal front beams higher than the longitudinal rear beams. The two are connected by multiple diagonal braces to form the traveling inclined frame. The upper front ends of the two working frames are connected by the longitudinal front beams, and the upper rear ends are connected by the longitudinal rear beams. Traveling gears are installed on the longitudinal front beams and longitudinal rear beams on the upper sides of the existing steel box arch structure via gear mounting seats. The top surface of the existing steel box arch structure has two symmetrically arranged rack-shaped traveling tracks on both sides. The traveling gears mesh with the traveling tracks, allowing the traveling gears to roll along the tracks. The traveling gears are equipped with gear locking devices, which can stop the traveling gears from rolling. The gear locking device includes a locking baffle, which is movably mounted on the gear mounting base and can be engaged between two adjacent teeth on the traveling gear, thereby stopping the traveling gear from rolling. The locking baffles of the two gear locking devices located on the longitudinal front beam and / or longitudinal rear beam are synchronously connected by a connecting rod. The two ends of the connecting rod are respectively close to the two working frames and are respectively movably mounted with connecting rod guide seats. The connecting rod guide seats are fixedly mounted on the longitudinal front beam and / or longitudinal rear beam. By moving the connecting rod, the locking baffles of the two gear locking devices can be synchronously engaged on the two traveling gears. The connecting rod guide seat has a guide groove corresponding to the connecting rod, and the connecting rod passes through the guide groove to achieve movable installation with the connecting rod guide seat; the top of the connecting rod guide seat has a vertical threaded hole communicating with the guide groove and is equipped with a locking bolt, and rotating the locking bolt can make it press tightly against the connecting rod.

2. The self-propelled hanging platform for steel box arch construction according to claim 1, characterized in that: The connecting rod also has stops on both sides of the connecting rod guide seat.

3. The self-propelled hanging platform for steel box arch construction according to claim 1, characterized in that: Multiple tightening screws are respectively installed on the lower part of the two working frames near the side of the existing steel box arch structure. The tightening screws are arranged longitudinally, with one end facing the side of the existing steel box arch structure, and the other end of the tightening screws moving through the vertical or horizontal bar of the working frame and connected to the vertical or horizontal bar by thread. Rotating the tightening screws can make them press tightly against the side of the existing steel box arch structure.

4. The self-propelled hanging platform for steel box arch construction according to claim 3, characterized in that: The tightening screw has a tightening head with an enlarged outer diameter at the end facing the existing steel box arch structure.

5. A self-propelled hanging platform for steel box arch construction according to any one of claims 1 to 4, characterized in that: A rectangular passageway platform frame is formed between the two long longitudinal bars at the front end of the connecting top frame. Multiple horizontal bars are located between the two long longitudinal bars in the passageway platform frame, and a passageway platform is installed there. Passage openings are reserved at both ends of the passageway platform. The passageway platform and the two passage openings form a walking passage connecting the two work frames. Guardrails are provided around the walking passage on the connecting top frame.

6. The self-propelled hanging platform for steel box arch construction according to claim 5, characterized in that: The work frame is also equipped with a vertically arranged channel frame below the channel entrance. The channel frame has 4 vertical rods, with the top of the vertical rods connected to the passage platform frame and the bottom of the vertical rods connected to the work platform frame. The channel frame forms a channel well that connects the passage platform and the work platform.

7. A self-propelled hanging platform for steel box arch construction according to claim 6, characterized in that: The central part of the channel derrick is also provided with a rectangular rest platform frame, on which a rest platform is installed.

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