Construction device and method of steel tube stiff skeleton concrete arch bridge bottom die suspension system

Abstract

A building device and method for a steel tube stiff skeleton concrete arch bridge bottom die suspension system belong to the technical field of hoisting and hoisting, and are technically characterized in that the building device comprises a tower crane main body consisting of a tower body, a tower cap, a hoisting arm and a balance arm, and a hoisting mechanism consisting of a variable amplitude trolley, a winch, a steel wire rope and a lifting hook; the tower crane further comprises a limiting and stabilizing mechanism, the limiting and stabilizing mechanism is installed on the tower crane body, and the limiting and stabilizing mechanism is matched with the lifting mechanism and used for enhancing the stability in the lifting process. By arranging the limiting and stabilizing mechanism, through the lifting sliding table synchronously ascending and descending along with the lifting hook and the steel wire rope, the limiting arm and the connecting frame, stable supporting and limiting are provided for the tail end of the steel wire rope, and when the steel wire rope and the lifting hook shake under the action of external force, on one hand, the shaking motion is buffered through elastic deformation and buffering of a buffering piece; and on the other hand, the impact force is counteracted through a stable structure formed by the tower body, the lifting sliding table, the limiting arm and the connecting frame, so that the stability of the lifting hook and a lifted component during lifting movement is effectively reduced.

Description

Technical Field

[0001] This invention belongs to the field of hoisting and lifting technology, specifically the construction device and method for the suspension system of the bottom formwork of a steel pipe rigid frame concrete arch bridge. Background Technology

[0002] A steel-tube rigid-frame concrete arch bridge is a widely used structural form in bridge engineering. Its core consists of a rigid frame made of high-strength steel tubes as the initial support, with concrete poured both inside and outside the frame to form an integrated arched bridge structure. This structure combines the high strength of steel tubes with the durability of concrete, making it particularly suitable for the construction of long-span arch bridges. It effectively improves the overall stability and load-bearing capacity of the bridge. During construction, a specialized suspension system is required to support the bottom formwork, ensuring the accuracy and safety of the pouring process.

[0003] During the construction of the suspension system and the bottom formwork, a tower crane is needed to suspend the supports, beams, and other components of the suspension system, as well as the bottom formwork, from the ground to a high altitude. During operation, the tower crane uses a traveling trolley for horizontal transport and a hook for vertical lifting to suspend the items. Since the main component used for suspending items is the steel wire rope, and the steel wire rope extends a considerable distance downwards from the traveling trolley, it lacks restraint. In actual suspension operations, the stability of the steel wire rope is affected not only by airflow and wind in the environment but also by the operating method of the tower crane operator. When hoisting items to a high altitude, the items and steel wire rope are prone to swaying and shaking. This not only greatly hinders the construction and assembly of the beams and bottom formwork but also poses certain safety hazards, which is detrimental to the stable suspension and assembly of the suspension system and bottom formwork.

[0004] In related technologies, in order to improve the stability of objects when suspended, a bridge support mold construction device and method have been disclosed, application number CN2024104057708. This patent can achieve efficient mold construction by setting up a hoisting mechanism and a splicing mechanism to cooperate with each other. During hoisting construction, the suspended mold can be guided and restricted to avoid swaying during the construction of the mold plate. However, in the construction of long-span arch bridges, due to the long suspension distance and the variable suspension height and position of the object, while the splicing mechanism has a small range of action and a relatively fixed position, there is a lack of necessary restraint during most of the long-distance upward journey of the object, resulting in large swaying and shaking amplitude under environmental influences.

[0005] In view of this, the present invention proposes a device and method for constructing a steel pipe rigid frame concrete arch bridge bottom formwork suspension system to solve the above-mentioned technical problems. Summary of the Invention

[0006] To overcome the shortcomings of existing technologies and solve the aforementioned technical problems, this invention proposes a device and method for constructing a steel pipe rigid frame concrete arch bridge bottom formwork suspension system.

[0007] The technical solution adopted by the present invention to solve its technical problem is: the erection device of the steel pipe rigid frame concrete arch bridge bottom formwork suspension system of the present invention includes a tower crane body composed of tower body, tower cap, lifting arm and counterweight arm, and a lifting mechanism composed of luffing trolley, winch, wire rope and hook.

[0008] It also includes a limit stabilization mechanism, which is installed on the tower crane body and works in conjunction with the hoisting mechanism to enhance stability during the hoisting process;

[0009] The limiting and stabilizing mechanism includes:

[0010] A lifting slide is sleeved and installed on the tower body, and the lifting slide is used to provide an installation position;

[0011] A limiting arm is installed on the circumferential surface of the lifting slide, and the limiting arm is arranged parallel to the lifting arm.

[0012] A connecting frame is used to connect a wire rope and a limiting arm. The connecting frame is installed on the limiting arm, and the wire rope passes through the connecting frame and is elastically connected to the connecting frame through a buffer.

[0013] Preferably, the lifting slide includes a connecting platform, a rotating platform, a lifting roller, and a lifting rope;

[0014] The connecting platform is slidably sleeved on the tower body, and a rotating platform is rotatably installed on the outer wall of the connecting platform. The rotating platform and the connecting platform are connected by an electromagnetic locking component, and the limiting arm is fixedly installed on the rotating platform.

[0015] A lifting roller is installed on the rotating platform. The lifting roller is externally driven by a motor. The lifting roller is connected to the balance arm by a lifting rope.

[0016] Preferably, the buffer includes a centering ring plate and a buffer spring;

[0017] A centering hole is provided in the middle of the connecting frame, and the steel wire rope passes through the centering hole and passes through the connecting frame. A buffer groove is provided on the connecting frame, and the centering ring plate is slidably installed in the buffer groove. The steel wire rope passes through the centering ring plate, and a uniformly distributed buffer spring is fixedly installed between the centering ring plate and the inner wall of the buffer groove.

[0018] Preferably, the limiting arm has a transverse sliding groove, and the connecting frame is slidably installed on the limiting arm through the transverse sliding groove. The connecting frame has a control groove, and the control groove, centering hole, and buffer groove are sequentially connected from top to bottom. A control ring plate is slidably installed in the control groove, and the wire rope passes through the control ring plate. The connecting frame has multiple slots, and the slots are connected to the control groove. A weight block is elastically installed in the slot through a support spring. The weight block is connected to the control ring plate through a transmission rope. The limiting arm is a frame-type mechanism. In the initial state, the control ring plate and the centering hole are coaxial, and the weight block extends into the gap of the limiting arm frame.

[0019] Preferably, the slot is a T-shaped structure, the slot is electrically connected to the buffer slot, a limiting plate is fixedly installed on the centering ring plate, the limiting plate extends into the slot, and the end of the support spring away from the weight block is fixedly installed on the limiting plate. In the initial state, the centering ring plate is coaxial with the centering hole, and the limiting plate is away from the weight block.

[0020] Preferably, the connecting frame is equipped with rollers, and the connecting frame slides in the transverse groove via the rollers. The connecting frame is equipped with a push rod, and an elastic friction plate is fixedly installed at the end of the push rod. The rollers are located on the movement path of the elastic friction plate. A transmission rod is fixedly installed in the control groove, and the transmission rod is located on the movement path of the control ring plate. Both the transmission rod and the push rod are hydraulic telescopic rods, and the transmission rod and the push rod are connected by a pipe.

[0021] Preferably, it also includes a limiting extension mechanism, which is mounted on the limiting arm and is used to expand the effective range of the limiting stabilizing mechanism;

[0022] The limiting extension mechanism includes an extension arm and a high-strength spring;

[0023] The bottom end of the connecting frame is hinged with evenly distributed extension arms. Multiple extension arms are elastically connected to the connecting frame by strong springs. In the initial state, multiple extension arms are arranged into a cone-shaped structure with the opening facing downward.

[0024] Preferably, an extension roller is installed at the top of the connecting frame, an extension motor is connected to the extension roller, an extension rope is installed on the extension roller, an assembly plate is fixedly installed between the wire rope and the hook, the extension rope is fixedly connected to the assembly plate, and multiple extension ropes are arranged into a cone-shaped structure with the opening facing upward.

[0025] Preferably, each of the extension arms has a pulley fixedly installed at the end away from the connecting frame, and the middle of each extension rope extends to the pulley. A limit frame is fixedly installed at the bottom of the connecting frame, and the limit frame is used to limit the rotation angle of the extension arm.

[0026] A method for constructing a suspension system for the bottom formwork of a steel-tube reinforced concrete arch bridge, comprising the following steps:

[0027] S1: The components used to build the suspension system are transported to the designated position under the tower crane. Then, the staff controls the movement of the tower crane body and the hoisting mechanism to suspend the components to the installation position.

[0028] S2: During the descent of the hook, the drive motor and lifting roller are controlled to release the lifting rope, the lifting slide descends, and the hook is connected to the component. At this time, the drive motor reverses and cooperates with the lifting mechanism to make the limit arm and the hook rise synchronously.

[0029] S3: After rising to the designated height, the crane arm rotates around the tower body, causing the component to move directly above the installation position. At this time, the lifting mechanism and the extension motor work synchronously, causing the wire rope and extension rope to gradually descend until the component is lowered to the installation position. By assembling the component, the bottom formwork suspension system is built.

[0030] The beneficial effects of this invention are as follows:

[0031] 1. The construction device and method for the bottom formwork suspension system of the steel pipe rigid frame concrete arch bridge of the present invention, by setting a limiting and stabilizing mechanism, and by using a lifting slide, limiting arm and connecting frame that rise and fall synchronously with the hook and wire rope, provides stable support and limiting for the end of the wire rope. When the wire rope and hook are subjected to external force and sway, on the one hand, the elastic deformation of the buffer component is used to buffer the swaying motion, and on the other hand, the stable structure composed of the tower body, lifting slide, limiting arm and connecting frame is used to offset the impact force, thereby effectively reducing the stability of the hook and the hoisted components during the lifting and lowering motion.

[0032] 2. The construction device and method of the steel pipe rigid frame concrete arch bridge bottom formwork suspension system of the present invention can form frictional resistance on the roller through the presence of elastic friction plates. As the connecting frame gradually moves to the bottom of the luffing trolley, the compression degree of the transmission rod decreases and the push rod gradually contracts, and the pressure between the elastic friction plates and the roller decreases, so that the connecting frame is in a low-speed and stable state during the movement. Attached Figure Description

[0033] The invention will now be further described with reference to the accompanying drawings.

[0034] Figure 1 This is an overall perspective view of the present invention;

[0035] Figure 2 This is a perspective view of the invention from another angle;

[0036] Figure 3 It is a 3D assembly diagram of the limit stabilization mechanism and the tower body;

[0037] Figure 4 It is a 3D diagram of the lifting slide;

[0038] Figure 5 It is a 3D assembly view of the connecting frame and the limiting arm;

[0039] Figure 6 It is a 3D view of the connecting frame;

[0040] Figure 7 This is a schematic diagram of the control slot on the connector frame;

[0041] Figure 8 This is a sectional view of the connecting frame;

[0042] Figure 9 It is a 3D assembly diagram of the push rod and the transmission rod;

[0043] Figure 10 This is a flowchart of the method of the present invention;

[0044] In the diagram: 1. Tower body; 11. Tower cap; 12. Lifting boom; 13. Counterweight boom; 14. Luffing trolley; 15. Wire rope; 16. Hook; 17. Winch; 2. Connecting platform; 21. Rotating platform; 22. Lifting roller; 23. Drive motor; 24. Lifting rope; 3. Limiting arm; 31. Lateral slide; 4. Connecting frame; 41. Centering hole; 42. Buffer groove; 43. Centering ring plate; 44. Buffer spring; 5. Control groove; 51. Control ring plate; 52. Slot; 53. Support spring; 54. Weight block; 55. Transmission rope; 56. Limiting plate; 6. Roller; 61. Push rod; 62. Elastic friction plate; 63. Transmission rod; 7. Extension arm; 71. Strong spring; 72. Extension roller; 73. Extension motor; 74. Extension rope; 75. Assembly plate; 76. Pulley; 77. Limiting frame. Detailed Implementation

[0045] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0046] like Figures 1 to 10 As shown, the erection device for the steel pipe rigid frame concrete arch bridge bottom formwork suspension system of the present invention includes a tower crane body consisting of a tower body 1, a tower cap 11, a lifting arm 12 and a counterweight arm 13, and a lifting mechanism consisting of a luffing trolley 14, a winch 17, a wire rope 15 and a hook 16. The tower crane body structure and the lifting mechanism are common tower crane components and are conventional existing technologies, which will not be described in detail here.

[0047] It also includes a limit stabilization mechanism, which is installed on the tower crane body and works in conjunction with the hoisting mechanism to enhance stability during the hoisting process;

[0048] The limiting and stabilizing mechanism includes:

[0049] A lifting slide is sleeved and installed on the tower body 1, and the lifting slide is used to provide an installation position;

[0050] Limiting arm 3 is installed on the circumferential surface of the lifting slide, and the limiting arm 3 is arranged parallel to the lifting arm 12.

[0051] A connecting frame 4 is used to connect a steel wire rope 15 and a limiting arm 3. The connecting frame 4 is installed on the limiting arm 3. The steel wire rope 15 passes through the connecting frame 4 and is elastically connected to the connecting frame 4 through a buffer.

[0052] The lifting slide includes a connecting platform 2, a rotating platform 21, a lifting roller 22, and a lifting rope 24;

[0053] The connecting platform 2 is slidably sleeved on the tower body 1. A rotating platform 21 is rotatably installed on the outer wall of the connecting platform 2. The rotating platform 21 and the connecting platform 2 are connected by an electromagnetic locking device. The limiting arm 3 is fixedly installed on the rotating platform 21. In actual application, the electromagnetic locking device is used to lock the rotating platform 21 and the connecting platform 2. Under the control of a pre-set program, when the lifting arm 12 and the counterweight arm 13 rotate around the tower body 1 under the operation of the operator, the electromagnetic locking device closes the locking function, allowing the rotating platform 21 and the connecting platform 2 to rotate relative to each other. At this time, under the transmission of the lifting rope 24, the rotating platform 21 will rotate with the lifting arm 12 and the counterweight arm 13, so that the lifting arm 12 and the limiting arm 3 always remain parallel. When the rotation of the lifting arm 12 ends, the electromagnetic locking device locks the rotating platform 21 and the connecting platform 2 again. In the locked state, the connecting platform 2 and the rotating platform 21 cannot rotate relative to each other. It should be noted that the electromagnetic locking device is a conventional lock in the prior art.

[0054] A lifting roller 22 is installed on the rotating platform 21. The lifting roller 22 is externally connected to a drive motor 23. The lifting roller 22 is connected to the balance arm 13 by a lifting rope 24.

[0055] The buffer component includes a centering ring plate 43 and a buffer spring 44;

[0056] The connecting frame 4 has a centering hole 41 in the middle. The steel wire rope 15 passes through the centering hole 41 and passes through the connecting frame 4. The connecting frame 4 has a buffer groove 42. The centering ring plate 43 is slidably installed in the buffer groove 42. The steel wire rope 15 passes through the centering ring plate 43. The centering ring plate 43 and the inner wall of the buffer groove 42 are fixedly installed with evenly distributed buffer springs 44.

[0057] In order to enhance the stability of the components constituting the suspension system during hoisting and reduce the influence of airflow in the surrounding environment, this invention includes a limit stabilizing mechanism. By limiting the end of the wire rope 15, the swaying of the hook 16 suspending the components is reduced.

[0058] Specifically, during the hoisting process, the main body of the tower crane, consisting of the tower body 1, tower cap 11, jib 12, and counterweight jib 13, primarily provides support and guidance. The hoisting mechanism installed on the main body is used for the actual hoisting of the components. The winch 17 winds or unwinds the wire rope 15 to achieve the lifting and lowering movement of the hook 16. The luffing trolley 14 is slidably mounted on the jib 12 to adjust the lateral position of the wire rope 15 and the hook 16. Since the main body and hoisting mechanism are common components of tower cranes, they will not be described in detail here. When the hook 16... When the lifting mechanism pulls the component for hoisting, the limiting and stabilizing mechanism simultaneously limits the end of the wire rope 15. The lifting slide is slidably mounted on the tower body 1. When the hook 16 in the lifting mechanism moves up and down, the lifting roller 22 on the rotating platform 21 rotates synchronously under the action of the drive motor 23. During the rotation of the lifting roller 22, the lifting rope 24 is wound or unwound. Since the other end of the lifting rope 24 is fixed to the balance arm 13, the lifting slide moves synchronously with the hook 16. The limiting arm 3 is mounted on the lifting slide... Extending towards the wire rope 15, since the limiting arm 3 is always parallel to the lifting arm 12, and the connecting frame 4 installed on the limiting arm 3 is assembled with the wire rope 15 and elastically connected through a buffer, during the synchronous lifting and lowering of the limiting arm 3 along with the hook 16 and the wire rope 15, when the hook 16, components, and wire rope 15 sway under external force, the connecting frame 4 is in a relatively stable state due to the restriction of the limiting arm 3 and the tower body 1. When the wire rope 15 sways, the wire rope 15 and the connecting frame 4 generate relative movement. At this time, the movement of the wire rope 15 will directly push the stationary... The centering ring plate 43 compresses or pulls the buffer spring 44 in the buffer groove 42 to buffer the sway of the wire rope 15. At the same time, as the movement distance of the centering ring plate 43 increases, the centering ring plate 43 is eventually blocked by the connecting frame 4. At this time, the force driving the hook 16 and the component movement is transmitted to the connecting frame 4, the limiting arm 3, the lifting slide, and finally to the tower body 1. The stability of the tower body 1 is used to counteract the driving force, thereby limiting the wire rope 15 and the hook 16 and reducing the sway of the wire rope 15, the hook 16 and the hoisted component.

[0059] It should also be noted that since the connecting frame 4 and the wire rope 15 are not directly fixed, in actual application, the position of the limiting stabilizing mechanism in the vertical direction of the wire rope 15 can be arbitrarily changed by manually adjusting the distance between the limiting arm 3 and the hook 16, so as to meet different work requirements.

[0060] This invention provides stable support and limit for the end of the wire rope 15 by setting up a limiting and stabilizing mechanism. The lifting slide, limiting arm 3, and connecting frame 4, which move synchronously with the hook 16 and the wire rope 15, provide stable support and limit. When the wire rope 15 and the hook 16 are shaken by external forces, the elastic deformation of the buffer component is used to buffer the shaking motion. On the other hand, the stabilizing structure composed of the tower body 1, the lifting slide, the limiting arm 3, and the connecting frame 4 is used to offset the impact force, thereby effectively reducing the stability of the hook 16 and the hoisted components during lifting and lowering.

[0061] In a preferred embodiment of the present invention, the limiting arm 3 is provided with a transverse sliding groove 31, and the connecting frame 4 is slidably mounted on the limiting arm 3 through the transverse sliding groove 31. The connecting frame 4 is provided with a control groove 5, and the control groove 5, the centering hole 41 and the buffer groove 42 are sequentially connected from top to bottom. A control ring plate 51 is slidably installed in the control groove 5, and the wire rope 15 passes through the control ring plate 51. The connecting frame 4 is provided with multiple slots 52, and the slots 52 are connected to the control groove 5. A weight block 54 is elastically installed in the slot 52 through a support spring 53. The weight block 54 is connected to the control ring plate 51 through a transmission rope 55. The limiting arm 3 is a frame-type mechanism. In the initial state, the control ring plate 51 and the centering hole 41 are coaxial, and the weight block 54 extends into the gap of the frame of the limiting arm 3.

[0062] The transverse chute 31 allows the connecting frame 4 to move along the length of the limiting arm 3. Combined with the movement of the luffing trolley 14 on the boom 12, this enables the alteration of the positions of the wire rope 15 and the hook 16. In practical applications, to prevent the adjustable design from affecting the limiting effect of the connecting frame 4 on the wire rope 15, in this invention, when the horizontal position of the wire rope 15 and the hook 16 needs adjustment, the operator first moves the luffing trolley 14 on the boom 12, causing the downward extension position of the wire rope 15 on the boom 12 to change. At this time, the wire rope 15 between the luffing trolley 14 and the connecting frame 4 gradually tilts from its initial vertical position. During this tilting process, under the pull of the hook 16's gravity, the wire rope 15 remains taut. The middle part of the control ring plate 51 is pushed by the control ring plate 51, causing the control ring plate 51 to move in the control groove 5. As the control ring plate 51 moves, the control ring plate 51 pulls the transmission rope 55, and the transmission rope 55 pulls the weight block 54, causing the weight block 54 to retract into the slot 52. At this time, the connecting frame 4 and the limiting arm 3 are in a state of relative sliding. Under the drag of the wire rope 15, the position of the connecting frame 4 is changed until the connecting frame 4 moves again to directly below the luffing trolley 14. At this time, the control ring plate 51 is reset. Under the elastic support of the support spring 53, the weight block 54 extends into the gap of the limiting arm 3 frame again, so that the connecting frame 4 and the limiting arm 3 are engaged. When the wire rope 15, hook 16 and components located below the connecting frame 4 sway, the connecting frame 4 in the fixed state can provide stable support.

[0063] The slot 52 is a T-shaped structure and is electrically connected to the buffer groove 42. A limiting plate 56 is fixedly installed on the centering ring plate 43. The limiting plate 56 extends into the slot 52, and the end of the support spring 53 away from the weight block 54 is fixedly installed on the limiting plate 56. In the initial state, the centering ring plate 43 is coaxial with the centering hole 41, and the limiting plate 56 is away from the weight block 54.

[0064] To further reduce the impact of adjustment operations on the stability of hoisting operations, when airflow is present in the environment, the airflow causes the wire rope 15 above the connecting frame 4 and the hook 16 and components below to sway. When the hook 16 and components sway, the wire rope 15 located below the centering hole 41 sways, which in turn causes the centering ring plate 43 to move within the buffer groove 42. After the centering ring plate 43 and the centering hole 41 are misaligned, the limiting plate 56 will be pushed. Since the weight block 54 and the slot 52 are distributed on both sides of the connecting frame 4, when the limiting plate 56 moves, it will cause the connecting frame 4 to sway. One side of the support spring 53 is pulled and the other side of the support spring 53 is compressed. When the steel wire rope 15 above the centering hole 41 tilts under the influence of airflow, the control plate gradually moves in the control groove 5 under the action of the tilted steel wire rope 15, thereby pulling the transmission rope 55. During this process, since one side of the support spring 53 is in a compressed state, the resistance of the control plate pulling the transmission rope 55 increases. Therefore, it can effectively reduce the probability of the steel wire rope 15 tilting due to airflow, thereby reducing the probability of the connecting frame 4 and the limiting arm 3 separating.

[0065] The connecting frame 4 is equipped with rollers 6, which slide within the transverse groove 31. A push rod 61 is also installed on the connecting frame 4, with an elastic friction plate 62 fixedly installed at the end of the push rod 61. The rollers 6 are located on the movement path of the elastic friction plate 62. A transmission rod 63 is fixedly installed within the control groove 5, located on the movement path of the control ring plate 51. Both the transmission rod 63 and the push rod 61 are hydraulic telescopic rods, and they are connected via pipes.

[0066] When adjusting the position of the connecting frame 4, as the luffing trolley 14 moves, the wire rope 15 above the connecting frame 4 gradually tilts, thereby pushing the control orifice plate to move. As the control orifice plate moves, the transmission rod 63 located on the movement path of the control orifice plate is compressed. The transmission rod 63 delivers the internal hydraulic oil to the push rod 61, causing the push rod 61 to extend and the elastic friction plate 62 to contact the roller 6. As the deflection angle of the wire rope 15 increases, the extension distance of the push rod 61 increases, and the pressure between the elastic friction plate 62 and the roller 6 increases. When the weight block 54 is fully retracted into the slot 5... After entering the interior, under the gravity of the inclined wire rope 15 and the hook 16, the connecting frame 4 tends to move directly below the luffing trolley 14. This tendency decreases as the alignment between the connecting frame 4 and the luffing trolley 14 increases. At this time, the presence of the elastic friction plate 62 can generate frictional resistance on the roller 6. As the connecting frame 4 gradually moves below the luffing trolley 14, the compression of the transmission rod 63 decreases, the push rod 61 gradually contracts, and the pressure between the elastic friction plate 62 and the roller 6 decreases, causing the connecting frame 4 to be in a low-speed and stable state during movement.

[0067] As a preferred embodiment of the present invention, it further includes a limiting extension mechanism, which is mounted on the limiting arm 3 and is used to expand the effective range of the limiting stabilizing mechanism;

[0068] The limiting extension mechanism includes an extension arm 7 and a strong spring 71;

[0069] The bottom end of the connecting frame 4 is hinged with evenly distributed extension arms 7. The multiple extension arms 7 are elastically connected to the connecting frame 4 by strong springs 71. In the initial state, the multiple extension arms 7 are arranged into a cone-shaped structure with the opening facing downward.

[0070] The multiple extension arms 7 are installed on the hook 16 and the component near the connecting frame 4. The extension arms 7 can contact the top of the component. By using the compression of the strong spring 71 by the extension arms 7, the connecting frame 4 and the component are in a relatively stable state under the action of elasticity.

[0071] An extension roller 72 is installed at the top of the connecting frame 4. An extension motor 73 is connected to the extension roller 72. An extension rope 74 is installed on the extension roller 72. An assembly plate 75 is fixedly installed between the wire rope 15 and the hook 16. The extension rope 74 is fixedly connected to the assembly plate 75. Multiple extension ropes 74 are arranged into a cone-shaped structure with the opening facing upward.

[0072] Each of the extension arms 7 has a pulley 76 fixedly installed at the end away from the connecting frame 4, and the middle of each of the extension ropes 74 extends to the pulley 76. A limit frame 77 is fixedly installed at the bottom of the connecting frame 4, and the limit frame 77 is used to limit the rotation angle of the extension arm 7.

[0073] Since the position between the limiting arm 3 and the hook 16 is adjustable to meet different work requirements, when adjusting the position between the limiting arm 3 and the hook 16, the lifting roller 22, the extension roller 72, and the winch 17 are coordinated. When the distance between the hook 16 and the connecting frame 4 changes, the extension motor 73 and the extension roller 72 rotate, causing the extension rope 74 between the assembly plate 75 and the connecting frame 4 to always be in a taut state. In practical applications, a tension gauge is installed on the assembly plate 75 and connected to the extension rope 74 to measure the tension of the extension rope 74 in real time, which facilitates the adjustment of the movement state of the extension motor 73 by the operator. In practical applications, the movement of the lifting slide on the tower body 1 is somewhat hindered. For example, during the descent, due to the influence of the bottom support structure of the tower body 1, the descent distance of the lifting slide is less than the descent distance of the hook 16. Another example is when hoisting components, the components are lifted from above the position to be installed. During lowering, the limiting arm 3 is not convenient to move towards the installation position. At this time, the operator controls the winch 17 and the extension motor 73 to control the hook 16 to gradually move away from the connecting frame 4. At this time, the multiple extension ropes 74 arranged in a cone shape around the hook 16 through the assembly plate 75 can cooperate with the limiting and stabilizing mechanism to limit the hook 16 and reduce the swaying degree of the hook 16 and the component during descent. The setting of multiple extension arms 7 makes the opening diameter of the top of the cone structure formed by multiple extension ropes 74 small, so the limiting effect on the hook 16 located in the center is good. It should be noted that when the cone structure limits the hook 16, since the size of the opening at the top of the cone structure is fixed, as the height of the cone structure gradually increases, the limiting effect of the cone structure on the hook 16 will gradually decrease. When the hook 16 is level with the pulley 76, the limiting strength of the multiple extension ropes 74 on the hook 16 is the greatest.

[0074] A method for constructing a suspension system for the bottom formwork of a steel-tube reinforced concrete arch bridge, comprising the following steps:

[0075] S1: The components used to build the suspension system are transported to the designated position under the tower crane. Then, the staff controls the movement of the tower crane body and the hoisting mechanism to suspend the components to the installation position.

[0076] S2: During the descent of the hook 16, the drive motor 23 and the lifting roller 22 are controlled to release the lifting rope 24, the lifting slide descends, and the hook 16 is connected to the component. At this time, the drive motor 23 reverses and cooperates with the lifting mechanism to cause the limit arm 3 and the hook 16 to rise synchronously.

[0077] S3: After rising to the designated height, the lifting arm 12 rotates around the tower body 1, causing the component to move directly above the installation position. At this time, the lifting mechanism and the extension motor 73 work synchronously, causing the wire rope 15 and the extension rope 74 to gradually descend until the component is lowered to the installation position. By assembling the component, the bottom formwork suspension system is built.

[0078] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for erecting a suspension system for the bottom formwork of a steel pipe rigid frame concrete arch bridge, characterized in that: The tower crane body consists of a tower body (1), a tower cap (11), a lifting arm (12) and a counterweight arm (13), and a hoisting mechanism consisting of a luffing trolley (14), a winch (17), a wire rope (15) and a hook (16). It also includes a limit stabilization mechanism, which is installed on the tower crane body and works in conjunction with the hoisting mechanism to enhance stability during the hoisting process; The limiting and stabilizing mechanism includes: A lifting slide is sleeved and installed on the tower body (1), and the lifting slide is used to provide an installation position; Limiting arm (3), the limiting arm (3) is installed on the circumferential surface of the lifting slide, and the limiting arm (3) is arranged parallel to the lifting arm (12); A connecting frame (4) is used to connect a wire rope (15) and a limiting arm (3). The connecting frame (4) is installed on the limiting arm (3). The wire rope (15) passes through the connecting frame (4) and is elastically connected to the connecting frame (4) through a buffer.

2. The erection device for the steel pipe rigid frame concrete arch bridge bottom formwork suspension system according to claim 1, characterized in that: The lifting slide includes a connecting platform (2), a rotating platform (21), a lifting roller (22), and a lifting rope (24). The connecting platform (2) is slidably sleeved on the tower body (1). A rotating platform (21) is rotatably installed on the outer wall of the connecting platform (2). The rotating platform (21) is connected to the connecting platform (2) through an electromagnetic locking component. The limiting arm (3) is fixedly installed on the rotating platform (21). A lifting roller (22) is installed on the rotating platform (21). The lifting roller (22) is connected to an external drive motor (23). The lifting roller (22) is connected to the balance arm (13) by a lifting rope (24).

3. The erection device for the bottom formwork suspension system of a steel pipe rigid frame concrete arch bridge according to claim 2, characterized in that: The buffer includes a centering ring plate (43) and a buffer spring (44). The connecting frame (4) has a centering hole (41) in the middle. The wire rope (15) passes through the centering hole (41) and passes through the connecting frame (4). The connecting frame (4) has a buffer groove (42). The centering ring plate (43) is slidably installed in the buffer groove (42). The wire rope (15) passes through the centering ring plate (43). The centering ring plate (43) and the inner wall of the buffer groove (42) are fixedly installed with evenly distributed buffer springs (44).

4. The erection device for the bottom formwork suspension system of a steel pipe rigid frame concrete arch bridge according to claim 3, characterized in that: The limiting arm (3) is provided with a transverse sliding groove (31). The connecting frame (4) is slidably installed on the limiting arm (3) through the transverse sliding groove (31). The connecting frame (4) is provided with a control groove (5). The control groove (5), the centering hole (41), and the buffer groove (42) are connected sequentially from top to bottom. A control ring plate (51) is slidably installed in the control groove (5). The wire rope (15) passes through the control ring plate (51). The connecting frame (4) is provided with a transverse sliding groove (31). Multiple slots (52) are provided, and the slots (52) are connected to the control slot (5). A weight block (54) is elastically installed in the slot (52) by a support spring (53). The weight block (54) is connected to the control ring plate (51) by a transmission rope (55). The limiting arm (3) is a frame-type mechanism. In the initial state, the control ring plate (51) is coaxial with the centering hole (41), and the weight block (54) extends into the gap of the frame of the limiting arm (3).

5. The erection device for the bottom formwork suspension system of a steel pipe rigid frame concrete arch bridge according to claim 4, characterized in that: The slot (52) is a T-shaped structure. The slot (52) is connected to the buffer slot (42). A limiting plate (56) is fixedly installed on the centering ring plate (43). The limiting plate (56) extends into the slot (52). The end of the supporting spring (53) away from the weight block (54) is fixedly installed on the limiting plate (56). In the initial state, the centering ring plate (43) is coaxial with the centering hole (41), and the limiting plate (56) is away from the weight block (54).

6. The erection device for the bottom formwork suspension system of a steel pipe rigid frame concrete arch bridge according to claim 5, characterized in that: The connecting frame (4) is equipped with rollers (6), and the connecting frame (4) slides in the transverse sliding groove (31) through the rollers (6). The connecting frame (4) is equipped with push rods (61), and elastic friction plates (62) are fixedly installed at the end of the push rods (61). The rollers (6) are located on the movement path of the elastic friction plates (62). The control groove (5) is fixedly installed with transmission rods (63), and the transmission rods (63) are located on the movement path of the control ring plate (51). Both the transmission rods (63) and the push rods (61) are hydraulic telescopic rods, and the transmission rods (63) and the push rods (61) are connected by pipes.

7. The erection device for the bottom formwork suspension system of a steel pipe rigid frame concrete arch bridge according to claim 6, characterized in that: It also includes a limiting extension mechanism, which is installed on the limiting arm (3) and is used to expand the range of action of the limiting stabilizing mechanism; The limiting extension mechanism includes an extension arm (7) and a strong spring (71). The bottom end of the connecting frame (4) is hinged with evenly distributed extension arms (7). Multiple extension arms (7) are elastically connected to the connecting frame (4) through strong springs (71). In the initial state, multiple extension arms (7) are arranged into a cone-shaped structure with the opening facing downward.

8. The erection device for the bottom formwork suspension system of a steel pipe rigid frame concrete arch bridge according to claim 7, characterized in that: The top of the connecting frame (4) is equipped with an extension roller (72), the extension roller (72) is connected to an extension motor (73), the extension roller (72) is equipped with an extension rope (74), the wire rope (15) is fixedly installed between the hook (16) and the extension rope (74), the extension rope (74) is fixedly connected to the assembly plate (75), and multiple extension ropes (74) are arranged into a cone-shaped structure with the opening facing upward.

9. The erection device for the bottom formwork suspension system of a steel pipe rigid frame concrete arch bridge according to claim 8, characterized in that: Each of the extension arms (7) has a pulley (76) fixedly installed at the end away from the connecting frame (4), and the middle of each extension rope (74) extends to the pulley (76). A limit frame (77) is fixedly installed at the bottom of the connecting frame (4), and the limit frame (77) is used to limit the rotation angle of the extension arm (7).

10. A method for constructing a suspension system for the bottom formwork of a steel pipe rigid frame concrete arch bridge, characterized in that: This method uses the erection device for the bottom formwork suspension system of the steel pipe rigid frame concrete arch bridge as described in claim 9, and the erection method includes the following steps: S1: The components used to build the suspension system are transported to the designated position under the tower crane. Then, the staff controls the movement of the tower crane body and the hoisting mechanism to suspend the components to the installation position. S2: During the descent of the hook (16), the drive motor (23) and the lifting roller (22) are controlled to release the lifting rope (24), the lifting slide descends, and the hook (16) is connected to the component. At this time, the drive motor (23) reverses and cooperates with the lifting mechanism to make the limit arm (3) and the hook (16) rise synchronously. S3: After rising to the designated height, the lifting arm (12) rotates around the tower body (1), causing the component to move to the position to be installed. At this time, the lifting mechanism and the extension motor (73) work synchronously, causing the wire rope (15) and the extension rope (74) to gradually descend until the component is lowered to the position to be installed. By assembling the component, the bottom formwork suspension system is built.

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