Self-propelled mechanism and self-propelled method of arch-mounted crane

Abstract

The present application relates to a kind of arch crane self-propelled mechanism and self-propelled method.Arch crane self-propelled mechanism, by the way of circulating movement and fixed crane bearing platform and, hoisting mechanism can be realized on arch rib self-propelled.Because the arrangement of the installation track is replaced by the arrangement of the hooking support point set on the steel pipe arch rib or steel box arch rib, the equipment is allowed to adopt the first hooking device and the second hooking device to circulate and hook on the hooking support point on the arch rib, so that the self-propelled mode can be used on the arch rib such as steel pipe arch rib and steel box arch rib, solve the problem of existing track installation limitation, and the fixation of walking anchoring end simultaneously utilizes the first hooking device and the first transverse limiting device, so that its braking capacity is stronger, can meet the corresponding walking demand.Arch crane self-propelled method uses walking oil cylinder to adjust the initial position, and then uses steel wire rope pulley set to fine adjust the overall position of crane bearing platform and hoisting mechanism, to ensure the safety of operation.

Description

Technical Field

[0001] This invention relates to the field of arch hoisting equipment technology, and in particular to a self-propelled mechanism and self-propelled method for an arch hoist. Background Technology

[0002] In the field of bridge construction, the existing cranes suitable for working on the arch of arch bridges mostly travel by motor-driven wheels on pre-set tracks on the arch ribs. This type is mostly used in steel box girder arch bridges suitable for installing steel rails, and common examples are small-tonnage bridge maintenance cranes used for steel box girder arch bridges. However, the method of equipment traveling on the arch for construction of steel-concrete composite arch bridges is unprecedented.

[0003] The existing technology of using wheels to travel on a pre-set track on an arch rib has the following problems: Installation limitations: The existing track + wheel mobility method is limited by the difficulty of track installation. The track and its fixing device need to be installed on a flat surface. Steel box arch bridges are easy to install tracks, while steel pipe concrete arch bridges are difficult to adapt to this form.

[0004] Braking Capability: When cranes or other equipment travel on arches, the longitudinal slope can typically reach up to 40°. This places extremely stringent demands on the braking capability of the equipment's travel mechanism. The braking method using rails and wheels relies on clamps holding the rails and braking through friction. However, this method is limited by the contact area of ​​the rails and is ineffective on steep longitudinal slopes.

[0005] The only method for cranes to travel on the arch of steel box girder bridges is a combination of rails and wheels. However, there are no related designs for cranes to travel on the arch of steel pipe girder bridges, which is a gap in the industry's construction practices. Summary of the Invention

[0006] The purpose of this invention is to address the problems of existing technologies where the traveling wheels travel on a pre-set track on the arch rib, which cannot be applied to the use of steel pipe arch ribs, resulting in installation limitations and insufficient braking capacity. This invention provides a self-propelled mechanism and method for an arch-mounted crane.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A self-propelled mechanism for an arch crane includes a crane support platform and a traveling anchor end. The crane support platform and the traveling anchor end are connected by a wire rope pulley block and a traveling cylinder. The wire rope pulley block and the traveling cylinder can respectively drive the crane support platform and the traveling anchor end to move closer and further apart. The traveling anchorage end includes a first main beam, which is arranged along the transverse direction of the bridge. The first main beam has first lateral limiting devices at both ends, which can clamp or release the transverse sides of the arch rib. A first hook device is provided on the first main beam, which can rotate in a direction with its rotation axis in the transverse direction. The first hook device can hook onto a hook support point on the arch rib. A traveling wheel is rotatably provided at the bottom of the first main beam, and the traveling wheel is used to mount the arch rib, with its rotation axis in the transverse direction. The crane carrying platform includes a main structure for mounting a lifting mechanism. The main structure has second lateral limiting devices on both sides of the transverse bridge, clamping the arch rib on both sides of the transverse bridge. The clamping parts of the second lateral limiting devices have clamping rollers that can roll along the axial direction of the arch rib. The main structure also has second hooking devices on both sides of the longitudinal bridge, capable of rotation along the transverse bridge direction, and able to hook onto hooking points on the arch rib. A traveling mechanism is located at the bottom of the main structure, mounted on the arch rib, and capable of driving the main structure to move along the axial direction of the arch rib.

[0008] The traveling wheels can reduce the friction of the traveling anchor end and prevent all traveling devices from scratching or damaging the anti-corrosion coating on the arch rib surface.

[0009] The self-propelled mechanism of the arch-mounted crane of this invention is hooked to the hook fulcrum on the arch rib by a first hooking device, and clamped to both sides of the arch rib in the transverse direction by a first lateral limiting device, which can ensure the fixation of the traveling anchor end. This allows for the initial and rapid forward movement of the unloaded crane platform using a traveling hydraulic cylinder. The lifting mechanism can be installed in the main structure of the crane platform, thus driving the crane platform and lifting mechanism as a whole to move forward to the next work point. Furthermore, the wire rope pulley system can safely and accurately adjust the crane platform and lifting mechanism as a whole to the work position when the crane platform is under load. This ensures the accuracy of the operation; and when the bearing platform and the hoisting mechanism move as a whole, the second hooking device can hook onto the hooking fulcrum on the arch rib, providing the main force point for the overall movement of the bearing platform and the hoisting mechanism. The second lateral limiting device clamps the two sides of the arch rib in the transverse direction, which can limit the transverse direction when the bearing platform and the hoisting mechanism move as a whole, and guide the bearing platform and the hoisting mechanism as a whole, so that it always moves along the axis of the arch rib. The part of the second lateral limiting device that clamps the arch rib has clamping rollers, so that it will not obstruct the overall movement of the bearing platform and the hoisting mechanism.

[0010] The main structure has second hooking devices on both sides along the longitudinal bridge. These second hooking devices hook onto hooking points on the arch ribs, ensuring the crane's carrying platform and lifting mechanism remain stationary. The traveling anchor end can then be propelled forward to a designated position by a traveling cylinder, preparing for the next forward movement of the crane's carrying platform. This cyclical movement and fixation of the crane's carrying platform and traveling anchor end enables the lifting mechanism to self-propel on the arch ribs. Because hooking points on steel pipe or steel box arch ribs replace the installation of rails, the equipment can use a traveling method where the first and second hooking devices cyclically hook onto the hooking points on the arch ribs. Therefore, this self-propelled method is applicable to both steel pipe and steel box arch ribs, solving the problem of limited rail installation. Furthermore, the fixing of the traveling anchor end utilizes both the first hooking device and the first lateral limiting device, resulting in strong braking capability and meeting the corresponding traveling requirements.

[0011] As a preferred embodiment of the present invention, the wire rope pulley block includes a traction movable pulley block, a traction fixed pulley block, and a traction winch. The traction winch is disposed on the first main beam or the main structure. The traction movable pulley block and the traction fixed pulley block are respectively disposed on the first main beam and the main structure. The traction wire rope of the traction winch is wound between the traction movable pulley block and the traction fixed pulley block. The traction winch is capable of changing the distance between the first main beam and the main structure. One end of the traveling cylinder is hinged to the first main beam, and the other end is hinged to the main structure.

[0012] As a preferred embodiment of the present invention, the main structure includes two longitudinal beams and at least two second main beams. The two longitudinal beams are respectively arranged on the arch ribs on both sides of the transverse bridge direction. All the second main beams are arranged along the transverse bridge direction. One end of each second main beam is fixedly connected to the longitudinal beam on one side by a fixed support, and the other end is connected to the longitudinal beam on the other side by a transverse movable support. The second main beam is used to install the lifting mechanism, and the second lateral limiting device, the second hooking device and the traveling mechanism are all located below the second main beam.

[0013] Two longitudinal beams and at least two second main beams form the main structure, which is a frame structure, lightweight, and conducive to movement on the arch ribs. All second main beams are fixedly connected at one end to the longitudinal beam on one side by fixed supports, and at the other end to the longitudinal beam on the other side by transverse movable supports, so that the width of the crane carrying platform can change synchronously with the spacing between the arch ribs when it moves on the arch ribs of the basket-shaped arch bridge.

[0014] As a preferred embodiment of the present invention, the traveling anchor end further includes a secondary beam, which is arranged along the transverse direction of the bridge. The secondary beam and the first main beam are connected by a connecting hydraulic cylinder, and the bottom of the secondary beam is provided with the traveling wheel corresponding to the first main beam. The first lateral limiting device is provided at both ends of the sub-beam corresponding to the first main beam.

[0015] The first main beam is the main load-bearing component, while the secondary beams and connecting cylinders serve only as auxiliary members, extending the load-bearing beam into a planar frame structure to prevent overturning.

[0016] As a preferred embodiment of the present invention, the first hook device is connected to a first hook telescopic cylinder. The first hook telescopic cylinder is arranged longitudinally. One end of the first hook telescopic cylinder is connected to the first main beam, and the other end is hinged to two different points of the first hook device. The extension and retraction of the first hook telescopic cylinder can drive the first hook device to change its angle. A first support pad is provided in the hook opening of the first hook device. The first support pad is adapted to abut against the hook fulcrum. The second hook device is connected to a second hook telescopic cylinder. One end of the second hook telescopic cylinder is fixed to the main structure and the other end is fixed to the second hook device. The hook openings of the second hook device are arranged facing each other at both ends in the longitudinal direction. A second support pad is provided in the hook opening of the second hook device. The second support pad is adapted to abut against the hook fulcrum.

[0017] As a preferred embodiment of the present invention, the second hook device includes two bending areas in the same direction. The bending area at the end of the second hook device is a hook opening. The second hook device has travel pin holes at different positions in the bending area near one end of the second hook telescopic cylinder. The second hook telescopic cylinder is connected to the second hook device by inserting a pin into the travel pin hole.

[0018] The second hook telescopic cylinder can adjust the angle and length of the second hook device by connecting to different travel pin holes of the second hook device.

[0019] As a preferred embodiment of the present invention, the first lateral limiting device includes a first vertical support, a first limiting cylinder and a first limiting end. The upper end of the first vertical support is connected to the first main beam or secondary beam, and the lower end of the first vertical support is connected to the first limiting cylinder. The first limiting cylinder is arranged along the transverse bridge direction, and one end of the first limiting cylinder is provided with the first limiting end. The first limiting end abuts against the outer side of the arch rib. The first limiting end abuts against the outer side of the arch rib, and the abutting surface is adapted to the outer side of the arch rib. The second lateral limiting device further includes a cantilever support, a second vertical support, and a clamping roller; the cantilever support is connected to the side of the main structure, the upper end of the second vertical support is fixedly connected to the cantilever support, and the lower end is provided with a clamping roller, the clamping roller is supported on the outside of the corresponding arch rib, and the axial direction of the clamping roller is vertical.

[0020] As a preferred embodiment of the present invention, the walking mechanism includes a wheel set, a distribution beam, and wheel beams. The distribution beam is connected to the bottom of the main structure, and two wheel beams are disposed at the bottom of the left and right sides of the distribution beam. Two wheel sets are provided at the bottom of the front and rear ends of each wheel beam, and the axial direction of the wheel set is transverse.

[0021] As a preferred embodiment of the present invention, the hook support point is a hanger or pin on the surface of the arch rib.

[0022] A method for self-propelled arch cranes, employing the self-propelled arch crane mechanism as described above, including travel of the crane mechanism in an unloaded state and travel in a loaded state; Walking without load involves the following steps: S1. The first hooking device is hooked onto the corresponding hooking fulcrum on the arch rib, and the first lateral limiting device clamps the arch rib on both sides in the transverse direction, thus completing the fixation of the traveling anchor end. S2. Slightly adjust the travel cylinder to release the load on the second hook device of the crane's carrying platform and retract the second hook device; S3. Retract the travel cylinder to move the crane's carrying platform and lifting mechanism forward to the next hook support point; S4. Hook the second hook device to the next hook support point to complete the fixation of the crane's load-bearing platform; S5. Slightly adjust the travel cylinder to release the first hook device at the travel anchor end, retract the first hook device, and release the first lateral limit device to both sides of the arch rib. S6. Extend the travel cylinder to support the travel anchor end until the next hook support point; S7. Repeat steps S1-S6 to initially move the entire self-propelled mechanism and lifting mechanism of the arch crane to the designated working position. Walking under load includes the following steps: S01. The first hooking device is fastened to the hooking fulcrum, and the first lateral limiting device clamps the transverse bridge sides of the arch rib to complete the fixing of the walking anchor end. S02. Tighten the wire rope pulley block to release the force from the travel cylinder, and then open the hydraulic circuit of the travel cylinder to make it a freely extendable rod. S03. The traction wire rope is extended by using the wire rope pulley block to allow the crane carrying platform and the lifting mechanism to travel together to the designated working position, and then the lifting mechanism lifts the object. S04. Slowly adjust the wire rope pulley block to fine-tune the position of the crane's load-bearing platform under load, and complete the load-bearing movement within a small range.

[0023] The self-propelled method for the arch crane described in this invention can be fixed and switched between the first hook device at the travel anchor end and the second hook device on the crane's carrying platform. Then, the self-propelled mechanism of the arch crane and the entire lifting structure can be self-propelled on the arch rib using the travel cylinder for initial position adjustment. After that, the first hook device and the first lateral limiting device at the travel anchor end are used for fixation, and the position of the crane's carrying platform and the entire lifting structure is finely adjusted using a wire rope pulley system, ensuring operational safety.

[0024] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. The self-propelled mechanism for the arch crane described in this invention enables the crane mechanism to self-propel on the arch rib by cyclically moving and fixing the crane's bearing platform and the traveling anchor end. Because hook supports are set on steel pipe arch ribs or steel box arch ribs instead of installing rails, the equipment can use a traveling method where the first hook device and the second hook device cyclically hook onto the hook supports on the arch rib. Therefore, this self-propelled method is universally applicable to arch ribs such as steel pipe arch ribs and steel box arch ribs, solving the problem of limited installation of existing rails. Furthermore, the fixing of the traveling anchor end utilizes both the first hook device and the first lateral limiting device, resulting in strong braking capability and meeting the corresponding traveling requirements.

[0025] 2. The self-propelled mechanism of the arch-mounted crane described in this invention comprises two longitudinal beams and at least two second main beams forming the main structure of the crane's carrying platform. This frame structure is lightweight and facilitates movement on the arch ribs. All second main beams are fixedly connected at one end to one side of the longitudinal beam via fixed supports, and at the other end to the other side of the longitudinal beam via transverse movable supports. This allows the crane's carrying platform to change its width synchronously with the spacing between the arch ribs when moving on the arch ribs of the basket-shaped arch bridge.

[0026] 3. In the self-propelled mechanism of the arch crane described in this invention, the first main beam at the traveling anchor end is the main load-bearing component, while the secondary beam and connecting cylinder are only auxiliary rods, thus expanding the load-bearing beam into a planar frame structure to avoid overturning.

[0027] 4. The self-propelled method for the arch crane described in this invention can be fixed and switched between the first hook device at the travel anchor end and the second hook device on the crane bearing platform. Then, the self-propelled mechanism of the arch crane and the entire lifting structure can be self-propelled on the arch rib by using the travel cylinder to make initial position adjustments. Then, the first hook device and the first lateral limiting device at the travel anchor end are used for fixation, and the position of the crane bearing platform and the entire lifting structure is finely adjusted by the wire rope pulley block to ensure operational safety. Attached Figure Description

[0028] Figure 1 This is a structural schematic diagram of the self-propelled mechanism of the arch crane described in this invention; Figure 2 yes Figure 1 A magnified view of a portion of circle A in the center; Figure 3 This is a side view of the crane's support platform. Figure 4 This is a schematic diagram of the second hook-and-hang device; Figure 5 This is a structural schematic diagram of the walking anchor end; Figure 6 This is a schematic diagram of the first hook and hanger device; Figure 7 This is a frontal view of the crane's support platform in use. Figure 8 yes Figure 7 A magnified view of a portion of circle B in the middle; Figure 9 This is a schematic diagram of the front view of the walking anchor end in use; Figure 10 yes Figure 9 A magnified view of a portion of the area circled in the middle, C.

[0029] Icons: 1. Crane bearing platform; 2. Traveling anchor end; 3. Wire rope pulley block; 31. Traction moving pulley block; 32. Traction fixed pulley block; 4. Traveling cylinder; 5. First main beam; 6. Secondary beam; 7. Connecting cylinder; 8. First hook device; 81. First hook telescopic cylinder; 82. First support pad; 9. First lateral limiting device; 901. First vertical support; 902. First limiting cylinder; 903. First limiting end; 10. Traveling wheel; 11. Second main beam; 12. Longitudinal beam; 13. Fixed support 14. Lateral moving support; 15. Traveling mechanism; 151. Wheel set; 152. Wheel beam; 153. Distribution beam; 16. Second hook device; 161. Second hook telescopic cylinder; 162. Second support pad; 163. Travel pin hole; 17. Second lateral limiting device; 171. Cantilever support; 172. Second vertical support; 173. Clamping roller; 18. Traction winch; 181. Traction wire rope; 19. Lifting mechanism; 20. Hook fulcrum; 21. Object; 101. Arch rib. Detailed Implementation

[0030] The present invention will be further described in detail below with reference to experimental examples and specific embodiments. However, this should not be construed as limiting the scope of the above-mentioned subject matter of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0031] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of the present invention is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the present invention or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a particular device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on the present invention.

[0032] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but that it can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0033] Furthermore, the use of terms such as "first," "second," "third," etc. in terminology is merely for distinguishing identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0034] Furthermore, in the description of the embodiments of the present invention, "several", "more than", and "a number of" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, nine, or even more than nine.

[0035] Furthermore, in the description of the technical solution of this invention, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "provided with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0036] Example 1 This embodiment provides a self-propelled mechanism for an arch-mounted crane; see [link / reference]. Figures 1-10 The system includes a crane carrying platform 1 and a traveling anchor end 2. The crane carrying platform 1 and the traveling anchor end 2 are connected by a wire rope pulley block 3 and a traveling cylinder 4. The wire rope pulley block 3 and the traveling cylinder 4 can respectively drive the crane carrying platform 1 and the traveling anchor end 2 to move closer and further apart. The wire rope pulley block 3 includes a traction movable pulley block 31, a traction fixed pulley block 32, and a traction winch 18. The traction winch 18 is disposed on the first main beam 5 or the main structure. The traction movable pulley block 31 and the traction fixed pulley block 32 are respectively disposed on the first main beam 5 and the main structure. The traction wire rope 181 of the traction winch 18 is wound between the traction movable pulley block 31 and the traction fixed pulley block 32. The traction winch 18 can change the distance between the first main beam 5 and the main structure. The traveling cylinder 4 is hinged at one end to the first main beam 5 and at the other end to the main structure.

[0037] The traveling anchorage end 2 includes a first main beam 5, which is arranged along the transverse direction of the bridge. The first main beam 5 has first transverse limiting devices 9 at both ends, which can clamp or release the transverse sides of the arch rib 101. Figure 10 As shown, the first lateral limiting device 9 includes a first vertical support 901, a first limiting cylinder 902, and a first limiting end 903. The upper end of the first vertical support 901 is connected to the first main beam 5 or the secondary beam 6, and the lower end of the first vertical support 901 is connected to the first limiting cylinder 902. The first limiting cylinder 902 is arranged along the transverse direction of the bridge, and one end of the first limiting cylinder 902 is provided with the first limiting end 903. The first limiting end 903 abuts against the outer side of the arch rib 101. The abutting surface of the first limiting end 903 abutting against the outer side of the arch rib 101 is adapted to the outer surface of the arch rib 101.

[0038] The first main beam 5 is equipped with a first hook device 8, which is rotatable. The rotation axis of the first hook device 8 is transverse, and the first hook device 8 can hook onto the hook support point 20 on the arch rib 101. Figure 5 and Figure 6As shown, the first hook device 8 is connected to a first hook telescopic cylinder 81. The first hook telescopic cylinder 81 is arranged longitudinally. One end of the first hook telescopic cylinder 81 is connected to the first main beam 5, and the other end is hinged to two different points of the first hook device 8. The extension and retraction of the first hook telescopic cylinder 81 can drive the first hook device 8 to change its angle. A first support pad 82 is provided in the hook opening of the first hook device 8. The first support pad 82 is adapted to abut against the hook fulcrum 20.

[0039] The bottom of the first main beam 5 is provided with a traveling wheel 10, which is used to be mounted on the arch rib 101. The axis of rotation of the traveling wheel 10 is in the transverse direction of the bridge. The traveling wheel 10 can reduce the friction of the traveling anchor end 2 when it moves forward, avoid excessive scraping of the arch rib when the first main beam 5 moves forward, and avoid all traveling devices scraping and damaging the anti-corrosion coating on the surface of the arch rib.

[0040] like Figure 1 and Figure 5 As shown, the walking anchoring end 2 also includes a secondary beam 6, which is arranged along the transverse direction of the bridge. The secondary beam 6 and the first main beam 5 are connected by a connecting cylinder 7. The bottom of the secondary beam 6 is provided with the walking wheel 10 corresponding to the first main beam 5. The two ends of the secondary beam 6 are provided with the first transverse limiting device 9 corresponding to the first main beam 5. The first main beam 5 is the main load-bearing component, and the secondary beam 6 and the connecting cylinder 7 only serve as auxiliary members to expand the load-bearing beam into a planar frame structure to avoid overturning.

[0041] The crane carrying platform 1 includes a main structure for mounting a lifting mechanism 19. The main structure has second lateral limiting devices 17 on both sides of the transverse bridge. These second lateral limiting devices 17 clamp the transverse bridge sides of the arch rib 101. The portions of the second lateral limiting devices 17 that clamp the arch rib 101 have clamping rollers 173, which can roll along the axial direction of the arch rib 101. Figure 8 As shown, the second lateral limiting device 17 further includes a cantilever support 171, a second vertical support 172, and a clamping roller 173; the cantilever support 171 is connected to the side of the main structure, the upper end of the second vertical support 172 is fixedly connected to the cantilever support 171, and the lower end is provided with a clamping roller 173, the clamping roller 173 is supported on the outside of the corresponding arch rib 101, and the axial direction of the clamping roller 173 is vertical.

[0042] The main structure is provided with second hooking devices 16 on both sides of the longitudinal bridge direction. The second hooking devices 16 are rotatable, with their rotation axis pointing transversely to the bridge. The second hooking devices 16 can hook onto the hooking fulcrum 20 on the arch rib 101. Figure 4As shown, the second hook-hanging device 16 is connected to a second hook-hanging telescopic cylinder 161. One end of the second hook-hanging telescopic cylinder 161 is fixed to the main structure, and the other end is fixed to the second hook-hanging device 16. The hook openings of the second hook-hanging device 16 at both ends are arranged facing each other. A second support pad 162 is provided in the hook opening of the second hook-hanging device, and the second support pad 162 is adapted to abut against the hook fulcrum 20. As a preferred option, the second hook-hanging device 16 includes two bending areas in the same direction. The bending area at the end of the second hook-hanging device 16 is the hook opening. The second hook-hanging device 16 has travel pin holes 163 at different positions in the bending area near the end of the second hook-hanging telescopic cylinder 161. The second hook-hanging telescopic cylinder 161 is connected to the second hook-hanging device 16 by inserting a pin into the travel pin hole 163. The second hook-hanging telescopic cylinder can change the angle and length of the second hook-hanging device 16 by connecting to different travel pin holes of the second hook-hanging device 16.

[0043] The main structure has a walking mechanism 15 at its bottom, which is mounted on the arch rib 101. The walking mechanism 15 can drive the main structure to move along the axial direction of the arch rib 101. Figure 8 As shown, the walking mechanism 15 includes a wheel set 151, a distribution beam 153 and a wheel beam 152. The distribution beam 153 is connected to the bottom of the main structure. Two wheel beams 152 are disposed on the bottom of the left and right sides of the distribution beam 153. Two wheel sets 151 are provided at the bottom of the front and rear ends of each wheel beam 152. The axial direction of the wheel set 151 is transverse.

[0044] In a preferred embodiment, the main structure comprises two longitudinal beams 12 and at least two second main beams 11. The second main beams 11 can be two, three, four, or even more. In this embodiment, two are used as an example to better correspond to the arch ribs on both sides of the arch bridge. The two longitudinal beams 12 are correspondingly arranged on the arch ribs 101 on both sides of the transverse bridge direction. All the second main beams 11 are arranged along the transverse bridge direction. One end of each second main beam 11 is fixedly connected to one side of the longitudinal beam 12 via a fixed support 13, and the other end is connected to the other side of the longitudinal beam 12 via a transverse movable support 14. This allows the width of the crane carrying platform 1 to change synchronously with the arch rib spacing when it moves on the basket-type arch bridge ribs. The two longitudinal beams 12 and at least two second main beams 11 form the main structure, which is a frame structure. The frame is laid flat on the upper surface of the arch ribs, making it lightweight and facilitating movement on the arch ribs. Each of the specific longitudinal beams is equipped with a second lateral limiting device 17 at both ends, and a traction winch 18 is installed on the longitudinal beam. A lifting mechanism is installed in the middle of the second main beam 11.

[0045] Specifically, such as Figure 7As shown, the second main beam 11 is used to install the lifting mechanism 19, and the second lateral limiting device 17, the second hook device 16 and the traveling mechanism 15 are all located below the second main beam 11.

[0046] In this design, the first hook device 8 and the second hook device 16 can be "type 7" hooks, which are retracted when the crane travels and lowered until they hook onto the hook support point when anchoring is required. Hook support points 20 are set on the inner surface of the arch ribs along the axis of the second main beam 11. In this embodiment, the hook support points 20 are hangers or pins on the surface of the arch ribs, providing tension for braking the entire traveling system when the hook devices are in operation. The first lateral limiting device 9 and the second lateral limiting device 17 act as clamps, ensuring that the traveling system moves forward and backward along the arch rib direction. The fixed support 13 and the lateral moving support 14 fix one end of the main beam, while the other end can move along its own axis, allowing the crane's width to change synchronously with the arch rib spacing when traveling on the arch ribs of the basket-type arch bridge. The above components are assembled into a whole to form the crane carrying platform 1 and the traveling anchor end 2. The traveling wheels 10 provide support for the traveling anchor end 2. The traveling mechanism 15 consists of multiple traveling wheels and short longitudinal beams, providing support for the crane carrying platform 1. Under heavy load conditions, the crane carrying platform will work on a slope of 5° to 40°. When the hook device is released, the platform is supported by the inclined surface of the arch rib and the tension of the traveling anchor end. The wire rope pulley block 3 is the suspension device and displacement fine adjustment device for the crane carrying platform 1 when lifting heavy objects. The crane carrying platform is tightened by the wire rope pulley block and hung against the surface of the arch rib. The traction winch 18 is used as its driving device. The traveling cylinder 4 is the re-traveling device for the crane carrying platform 1 and the traveling anchor end 2 when not in lifting operations.

[0047] The self-propelled mechanism of the arch crane of the present invention is hooked to the hook support point 20 on the arch rib 101 by the first hooking device 8, and clamped to both sides of the transverse bridge direction of the arch rib 101 by the first lateral limiting device 9, which can ensure the fixation of the traveling anchor end 2. Then, the crane carrying platform 1 can be initially and quickly driven forward by the traveling cylinder 4. The traveling cylinder 4 is responsible for the forward and backward movement of the crane carrying platform 1 when it is unloaded. Its feature is that it can be quickly adjusted but cannot bear a large load. The lifting mechanism 19 can be set in the main structure of the crane carrying platform 1, that is, it can drive the crane carrying platform 1 and the lifting mechanism 19 to move forward as a whole to the next working point. The wire rope pulley block is used in the crane carrying platform. When the platform is under load, the crane carrying platform and the entire lifting mechanism can be safely and accurately adjusted to the working position. It is characterized by large load capacity, slow speed and precision, ensuring the accuracy of the operation. When the carrying platform 1 and the lifting mechanism 19 move as a whole, the second lateral limiting device 17 clamps the two sides of the arch rib 101 in the transverse direction, which can limit the transverse direction when the carrying platform 1 and the lifting mechanism 19 move as a whole, and guide the carrying platform 1 and the lifting mechanism 19 as a whole, so that they always move along the axis of the arch rib. The part of the second lateral limiting device 17 that clamps the arch rib 101 has clamping rollers 173, so that it will not obstruct the movement of the carrying platform 1 and the lifting mechanism 19 as a whole.

[0048] The main structure has second hook devices 16 on both sides along the longitudinal direction of the bridge. The second hook devices 16 hook onto the hook support points 20 on the arch rib 101, thereby ensuring that the crane carrying platform 1 and the crane mechanism 19 remain stationary. The traveling cylinder 4 can push the traveling anchor end 2 forward to the designated position to prepare for the next forward movement of the crane carrying platform 1. Through this cyclical movement and fixing of the crane carrying platform 1 and the traveling anchor end 2, the crane mechanism 19 can move on the arch rib by itself. Since the arrangement of setting hook support points on steel pipe arch ribs or steel box arch ribs instead of installing rails allows the equipment to travel by cyclically hooking the first hook device and the second hook device onto the hook support points on the arch rib. Therefore, this self-propelled method can be used on steel pipe arch ribs and steel box arch ribs, solving the problem of limited installation of existing rails. In addition, the fixing of the traveling anchor end 2 utilizes both the first hook device 8 and the first lateral limiting device 9, which makes its braking ability strong and can meet the corresponding travel requirements.

[0049] Example 2 This embodiment provides a self-propelled method for an arch crane, employing the self-propelled mechanism of the arch crane as described in Embodiment 1. This includes the crane mechanism 19 traveling in both unloaded and loaded states. During these travels, a second lateral limiting device 17 clamps the transverse sides of the arch rib 101, limiting the transverse direction and guiding the entire load-bearing platform 1 and crane mechanism 19 as they move, ensuring they always move along the axis of the arch rib. The portion of the second lateral limiting device 17 that clamps the arch rib 101 has clamping rollers 173, preventing any obstruction to the overall movement of the load-bearing platform 1 and crane mechanism 19.

[0050] Walking without load involves the following steps: S1. By operating the first hook telescopic cylinder 81, the first hook device 8 is hooked onto the corresponding hook fulcrum 20 on the arch rib 101, and by operating the first limiting cylinder 902, the first lateral limiting device 9 clamps the arch rib 101 on both sides of the transverse bridge direction, thus completing the fixation of the walking anchor end 2. S2. Slightly adjust the travel cylinder 4 to release the second hook device 16 of the crane carrying platform 1, and retract the second hook device 16 by operating the second hook telescopic cylinder 161. S3. Retract the travel cylinder 4, and with the support of the travel mechanism 15, drive the crane carrying platform 1 and the lifting mechanism 19 to move forward as a whole to the next hook support point 20. S4. By operating the second hook telescopic cylinder 161, the second hook device 16 is hooked to the next hook support point 20, thus completing the fixation of the crane bearing platform 1. S5. Slightly adjust the travel cylinder 4 to release the first hook device 8 of the travel anchor end 2, retract the first hook device 8 by operating the first hook telescopic cylinder 81, and release the first lateral limit device 9 from the arch rib 101 to both sides by operating the first limit cylinder 902. S6. Extend the travel cylinder 4 and, supported by the travel wheel 10, prop up the travel anchor end 2 until the next hook fulcrum 20. S7. Repeat steps S1-S6 to initially move the entire self-propelled mechanism and lifting mechanism 19 of the arch crane to the designated working position. After walking to the designated position in an unloaded state, fine-tuning is performed by walking under load.

[0051] Walking under load includes the following steps: S01. Hook the first hook device 8 to the hook fulcrum 20, and clamp the first lateral limiting device 9 on both sides of the transverse bridge direction of the arch rib 101 to complete the fixation of the walking anchor end 2. Step S01 is the step after S6 after the last repetition of step S7, that is, after the initial positioning, fix the walking anchor end 2 at the next hook fulcrum 20. S02. By operating the traction winch 18, the wire rope pulley block 3 is tightened, the travel cylinder 4 is released from force, and then the hydraulic circuit of the travel cylinder 4 is opened, so that it becomes a freely telescopic rod. S03. The traction wire rope 181 is lengthened by the wire rope pulley block 3, so that the crane carrying platform 1 and the lifting mechanism 19 are moved to the designated working position as a whole, and then the lifting mechanism 19 lifts the object 21. S04. Slowly adjust the wire rope pulley block 3, fine-tune the position of the crane bearing platform 1 under load, and complete the load-bearing movement within a small range.

[0052] The self-propelled method for the arch crane described in this invention can be fixed and switched between the first hook device 8 at the travel anchor end 2 and the second hook device 16 at the crane bearing platform 1. Then, the self-propelled mechanism of the arch crane and the lifting mechanism 19 can be self-propelled on the arch rib by using the travel cylinder 4 to make initial position adjustments. Then, the first hook device 8 and the first lateral limiting device 9 at the travel anchor end 2 are used for fixation, and the overall position of the crane bearing platform 1 and the lifting mechanism 19 is finely adjusted by the wire rope pulley block 3 to ensure operational safety.

[0053] After fine-tuning, the hoisting operation is completed. The crane's bearing platform 1 is reset, the hydraulic circuit of the travel cylinder 4 is readjusted, and the unloaded travel state is restored. The initial adjustment position of the unloaded travel state, the fine-tuning position of the loaded travel state, and the hoisting operation are repeated until the hoisting operation is completed.

[0054] The self-propelled method for an arch-mounted crane described in this invention can be applied to the construction of arch bridges. It features self-propelled movement in environments with steep longitudinal slopes, fully utilizes the arch ribs as the foundation for movement, achieves a "permanent-temporary combination" effect, and significantly improves structural utilization. By finely adjusting the size of the lateral limiting device, this method can be applied to box arch bridges and steel pipe arch bridges, including parallel arch sections and the inclined inward arch sections of basket arch bridges. It can be well adapted to the construction of various arch bridges and has versatility. The arch-walking method can be applied to a variety of construction equipment. Arch-walking can significantly reduce the work site or work platform required for placing large construction machinery during construction, reduce the environmental impact caused by actual construction, reduce the huge amount of engineering work required for site and platform construction, and achieve the goal of reducing land use and being green and environmentally friendly.

[0055] This walking method uses a hook-and-hang method to fix itself to the arch rib, which has obvious stress characteristics. Compared with the clamp-type and track-clamping braking methods, its safety performance is more reliable. It can move within the entire arch ring of the bridge and complete the hoisting and loading of various components, including bridge deck steel beams, within one hook-and-hang point spacing. It opens up a new construction method in the field of steel structure arch bridge construction, represented by box arch bridges and steel pipe arch bridges, fills the gap of no arch-walking equipment for steel pipe arch bridges, and provides a reference for the construction of subsequent arch bridges.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A self-propelled mechanism for an arch-mounted crane, characterized in that, It includes a crane carrying platform (1) and a traveling anchor end (2). The crane carrying platform (1) and the traveling anchor end (2) are connected by a wire rope pulley block (3) and a traveling cylinder (4). The wire rope pulley block (3) and the traveling cylinder (4) can drive the crane carrying platform (1) and the traveling anchor end (2) to move closer and further apart, respectively. The traveling anchor end (2) includes a first main beam (5), which is arranged along the transverse direction of the bridge. The first main beam (5) is provided with a first transverse limiting device (9) at both ends. The first transverse limiting device (9) at both ends can clamp or release the transverse sides of the arch rib (101). The first main beam (5) is provided with a first hook device (8). The first hook device (8) can rotate in a certain direction. The rotation axis of the first hook device (8) is in the transverse direction of the bridge. The first hook device (8) can hook onto the hook support point (20) on the arch rib (101). The bottom of the first main beam (5) is provided with a traveling wheel (10). The traveling wheel (10) is used to be set on the arch rib (101). The rotation axis of the traveling wheel (10) is in the transverse direction of the bridge. The crane carrying platform (1) includes a main structure, which is used to set up the lifting mechanism (19). The main structure has a second lateral limiting device (17) on both sides of the transverse bridge. The second lateral limiting device (17) clamps the arch rib (101) on both sides of the transverse bridge. The part of the second lateral limiting device (17) that clamps the arch rib (101) has a clamping roller (173). The clamping roller (173) can roll along the axial direction of the arch rib (101). The main structure has a longitudinal... A second hook device (16) is provided on both sides of the bridge. The second hook device (16) can rotate in a direction. The rotation axis of the second hook device (16) is in the transverse direction of the bridge. The second hook device (16) can hook onto the hook support point (20) on the arch rib (101). A walking mechanism (15) is provided at the bottom of the main structure. The walking mechanism (15) is set on the arch rib (101). The walking mechanism (15) can drive the main structure to move along the axis of the arch rib (101).

2. The self-propelled mechanism for the arch-mounted crane according to claim 1, characterized in that, The wire rope pulley block (3) includes a traction movable pulley block (31), a traction fixed pulley block (32), and a traction winch (18). The traction winch (18) is located on the first main beam (5) or the main structure. The traction movable pulley block (31) and the traction fixed pulley block (32) are respectively located on the first main beam (5) and the main structure. The traction wire rope (181) of the traction winch (18) is wound between the traction movable pulley block (31) and the traction fixed pulley block (32). The traction winch (18) can change the distance between the first main beam (5) and the main structure. The walking cylinder (4) is hinged at one end to the first main beam (5) and at the other end to the main structure.

3. The self-propelled mechanism for the arch-mounted crane according to claim 1, characterized in that, The main structure includes two longitudinal beams (12) and at least two second main beams (11). The two longitudinal beams (12) are respectively arranged on the arch ribs (101) on both sides of the transverse bridge direction. All the second main beams (11) are arranged along the transverse bridge direction. One end of all the second main beams (11) is fixedly connected to the longitudinal beam (12) on one side by a fixed support (13), and the other end is connected to the longitudinal beam (12) on the other side by a transverse moving support (14). The second main beam (11) is used to set up the lifting mechanism (19), and the second lateral limiting device (17), the second hook device (16) and the traveling mechanism (15) are all located below the second main beam (11).

4. The self-propelled mechanism for the arch-mounted crane according to claim 1, characterized in that, The walking anchor end (2) also includes a sub-beam (6), which is arranged along the transverse direction of the bridge. The sub-beam (6) and the first main beam (5) are connected by a connecting cylinder (7). The bottom of the sub-beam (6) is provided with the walking wheel (10) corresponding to the first main beam (5). The first lateral limiting device (9) is provided at both ends of the sub-beam (6) corresponding to the first main beam (5).

5. The self-propelled mechanism for the arch-mounted crane according to claim 1, characterized in that, The first hook device (8) is connected to a first hook telescopic cylinder (81). The first hook telescopic cylinder (81) is arranged longitudinally. One end of the first hook telescopic cylinder (81) is connected to the first main beam (5), and the other end is hinged to the first hook device (8). The extension and retraction of the first hook telescopic cylinder (81) can drive the first hook device (8) to change its angle. The hook opening of the first hook device (8) is provided with a first support pad (82). The first support pad (82) is adapted to abut against the hook fulcrum (20). The second hook device (16) is connected to a second hook telescopic cylinder (161). One end of the second hook telescopic cylinder (161) is fixed to the main structure and the other end is hinged to the second hook device (16). The hook openings of the second hook device (16) at both ends of the longitudinal direction are arranged facing each other. A second support pad (162) is provided in the hook opening of the second hook device (16). The second support pad (162) is adapted to abut against the hook fulcrum (20).

6. The self-propelled mechanism for the arch-mounted crane according to claim 5, characterized in that, The second hook device (16) includes two bending areas in the same direction. The bending area at the end of the second hook device (16) is a hook opening. The second hook device (16) has travel pin holes (163) at different positions of the bending area near the end of the second hook telescopic cylinder (161). The second hook telescopic cylinder (161) is connected to the second hook device (16) by inserting a pin into the travel pin hole (163).

7. The self-propelled mechanism for the arch-mounted crane according to claim 1, characterized in that, The first lateral limiting device (9) includes a first vertical support (901), a first limiting cylinder (902) and a first limiting end (903). The upper end of the first vertical support (901) is connected to the first main beam (5) or the secondary beam (6), and the lower end of the first vertical support (901) is connected to the first limiting cylinder (902). The first limiting cylinder (902) is arranged along the transverse direction of the bridge. One end of the first limiting cylinder (902) is provided with the first limiting end (903), and the first limiting end (903) abuts against the outer side of the arch rib (101). The first limiting end (903) abuts against the outer side of the arch rib (101), and the abutting surface is adapted to the outer side of the arch rib (101); The second lateral limiting device (17) further includes a cantilever support (171), a second vertical support (172), and a clamping roller (173); the cantilever support (171) is connected to the side of the main structure, the upper end of the second vertical support (172) is fixedly connected to the cantilever support (171), and the lower end is provided with a clamping roller (173), the clamping roller (173) is rolled and supported on the outside of the corresponding arch rib (101), and the axial direction of the clamping roller (173) is vertical.

8. The self-propelled mechanism for the arch-mounted crane according to any one of claims 1-7, characterized in that, The walking mechanism (15) includes a wheel set (151), a distribution beam (153) and a wheel beam (152). The distribution beam (153) is connected to the bottom of the main structure. Two wheel beams (152) are located at the bottom of the left and right sides of the distribution beam (153). Two wheel sets (151) are provided at the bottom of the front and rear ends of each wheel beam (152). The axial direction of the wheel set (151) is transverse.

9. The self-propelled mechanism for the arch-mounted crane according to any one of claims 1-7, characterized in that, The hook fulcrum (20) is a hanger or pin on the surface of the arch rib.

10. A method for self-propelled arch cranes, characterized in that, The self-propelled mechanism of the arch crane as described in any one of claims 1-9 includes the crane mechanism (19) traveling in an unloaded state and traveling in a loaded state; Walking without load involves the following steps: S1. The first hook device (8) is hooked to the corresponding hook support point (20) on the arch rib (101), and the first lateral limiting device (9) clamps the arch rib (101) on both sides of the transverse bridge direction to complete the fixation of the walking anchor end (2). S2. Slightly adjust the travel cylinder (4) to release the second hook device (16) of the crane bearing platform (1) and retract the second hook device (16). S3, retract the travel cylinder (4) to move the crane bearing platform (1) and the crane mechanism (19) forward to the next hook support point (20); S4. Hook the second hook device (16) to the next hook support point (20) to complete the fixing of the crane bearing platform (1); S5. Slightly adjust the travel cylinder (4) to release the first hook device (8) of the travel anchor end (2), retract the first hook device (8), and release the first lateral limiting device (9) from the transverse bridge of the arch rib (101) to both sides. S6. Extend the travel cylinder (4) and support the travel anchor end (2) until the next hook support point (20). S7. Repeat steps S1-S6 to initially move the entire self-propelled mechanism and lifting mechanism (19) of the arch crane to the designated working position. Walking under load includes the following steps: S01. Hook the first hook device (8) to the hook fulcrum (20), and clamp the first lateral limiting device (9) on both sides of the arch rib (101) to complete the fixation of the walking anchor end (2). S02. Tighten the wire rope pulley block (3) to release the force from the travel cylinder (4), and then open the hydraulic circuit of the travel cylinder (4) to make it a freely extendable rod. S03. The traction wire rope (181) is lengthened by the wire rope pulley block (3) so that the crane carrying platform (1) and the lifting mechanism (19) can be moved to the designated working position as a whole, and then the object (21) is lifted by the lifting mechanism (19). S04. Slowly adjust the wire rope pulley block (3) and finely adjust the position of the crane bearing platform (1) under load to complete the load-bearing movement within a small range.

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