Cantilever beam support lower placing device and its protection device

Abstract

The application relates to a bent cap support lower placing device and a protection device thereof, the protection device comprising a stress driving mechanism and a rope holding mechanism, the stress driving mechanism comprising a support plate and a stress driving assembly, and the rope holding mechanism comprising a fixing assembly and at least two rope holding assemblies. An installation support is installed on a bent cap which has been constructed, the protection device is installed on the installation support, a lower placing driving mechanism is installed on the support plate, and a lifting rope is connected to the bent cap support after passing through first through holes of the support plate and second through holes of the rope holding assemblies. When the lower placing driving mechanism loses control and the lifting rope suddenly falls, the pressure applied to the support plate suddenly decreases. The stress driving assembly is arranged between the rope holding mechanism and the support plate, the support plate drives the stress driving assembly to push the rope holding assemblies to move downwards, so that the diameters of the second through holes surrounded by the rope holding assemblies are reduced and the rope holding assemblies are tightly held on the lifting rope, the lifting rope is relieved from continuously falling, the falling speed of the lifting rope is reduced, and the safety of the bent cap support in the whole lower placing process is improved.

Description

Technical Field

[0001] This application relates to the field of bridge construction technology, and in particular to equipment for lowering cap beam supports and its protective devices. Background Technology

[0002] In bridge engineering, the construction of the cap beam is a crucial step. After the cap beam is poured and reaches its design strength, the process of dismantling the cap beam support is often accompanied by high risks and low efficiency. Traditional dismantling operations mostly rely on manual dismantling of scattered components at high altitudes. This not only involves a large amount of work at heights but also requires personnel to be in a high-risk working environment for extended periods, seriously threatening the lives of construction workers and hindering the progress of construction.

[0003] With technological advancements, the method of dismantling a girder support by lowering it as a whole has gradually gained application. For example, patent application CN110820560A describes a method for dismantling a girder support clamp, which uses I-beam supports and a hand-operated hoist to lower the entire support, effectively reducing the amount of work at height and improving construction safety. However, in actual operation, the hoisting of the girder support relies entirely on the steel wire rope for support, and the lowering speed is controlled by the hand-operated hoist or lowering equipment. If operational errors or equipment malfunctions occur, the support can easily fall rapidly, causing a safety accident.

[0004] To address the issue of falling during hoisting, patent CN222821143U describes a cable crane hook anti-fall device that uses chemical agents to bond the wire rope and locking pins to support the hook to achieve fall prevention. However, this device has a complex structure, requires replacement of components such as expansion tubes after use, and is difficult to reuse; furthermore, the chemical bonding can cause irreversible damage to the wire rope, affecting its subsequent performance and increasing maintenance costs. Patent application CN118706494A describes a fall arrestor safety detection device, which discloses controlling the lengthening or shortening of the hoisting rope through a control limit component. It simulates the force of free fall on the fall arrestor body during operation, meeting the detection requirements of the fall arrestor body, but does not explain how to achieve fall prevention.

[0005] Therefore, there is an urgent need to develop a safe, reliable, simple, and reusable device and method for dismantling cap beam supports in order to solve the problems existing in the current technology. Summary of the Invention

[0006] Therefore, it is necessary to provide a safe, reliable, simple, and reusable girder support lowering device and its protective device, as well as a girder support lowering control method, to address the above problems.

[0007] A protective device for a beam support lowering device includes a force-driven mechanism and a rope-holding mechanism. The force-driven mechanism includes a support plate and a force-driven assembly. The force-driven assembly is disposed on the support plate, which supports the lowering drive mechanism. A first through hole for the hoisting rope is provided on the support plate. The rope-holding mechanism is disposed below the force-driven mechanism and includes a fixing component and at least two rope-holding components. Each rope-holding component is spaced apart and movably disposed on the fixing component. The inner wall of each rope-holding component forms a second through hole for the hoisting rope to pass through. When the pressure applied to the support plate by the lowering drive mechanism decreases, the support plate drives the force-driven assembly to push the rope-holding components downward, thereby reducing the diameter of the second through hole formed by the rope-holding components and causing each rope-holding component to hold the hoisting rope tightly.

[0008] In one embodiment, the rope-holding assembly includes rope-holding wedges and elastic balls. The cross-sectional dimensions of the rope-holding wedges tend to decrease along the direction away from the force-driven assembly. The inner walls of the rope-holding wedges of each rope-holding assembly form a second through hole. The elastic ball is movably disposed on the inner wall of the rope-holding wedges and partially protrudes from the second through hole. The elastic ball is compressible and deformable. The fixing assembly has a clamping hole. The size of the clamping hole tends to decrease along the direction away from the force-driven assembly. The rope-holding wedges of each rope-holding assembly are movably disposed within the clamping hole. When the rope-holding wedges move upward to a first position within the clamping hole, the elastic balls on each rope-holding wedge are spaced apart from the rope. When the rope-holding wedges move downward to a second position within the clamping hole, each rope-holding wedge compresses the rope through the elastic balls.

[0009] In one embodiment, a compression groove is provided on the inner wall of the rope-holding inclined block. The cross-sectional dimension of the compression groove tends to increase along the direction away from the force-driven component. The elastic ball is rotatably disposed in the compression groove, and when the elastic ball is located at the bottom of the compression groove, a portion of the elastic ball protrudes from the compression groove and is located in the second perforation.

[0010] In one embodiment, each of the rope-holding inclined blocks is provided with a plurality of elastic balls, each elastic ball being spaced apart along the length of the rope, and each of the rope-holding inclined blocks has a plurality of compression grooves on its inner wall, with each elastic ball correspondingly disposed in one of the compression grooves.

[0011] In one embodiment, the fixing component includes a fixing sleeve and a resetting member. The fixing sleeve has the clamping hole, and the resetting member is movably disposed on the inner wall of the clamping hole. The resetting member provides the rope-holding inclined block with a resetting elastic force to reset from the second position to the first position.

[0012] In one embodiment, the inner wall of the clamping hole is further provided with a first guide portion, and the rope clamping block is provided with a second guide portion. The first guide portion and the second guide portion guide and cooperate with each other, and the guiding direction of the first guide portion is the inclined direction of the inner wall of the clamping hole.

[0013] In one embodiment, the force-driven assembly includes a linkage rod, a sliding sleeve, a driving elastic element, and a guide post. The guide post is located below the support plate and above the rope-holding mechanism. The sliding sleeve is disposed on the guide post and is slidable between the support plate and the rope-holding assembly. The driving elastic element is disposed on the guide post and is used to provide a driving elastic force to the sliding sleeve toward the rope-holding assembly. One end of the linkage rod is rotatably disposed on the sliding sleeve, and the other end is movably disposed on the support plate.

[0014] In one embodiment, the force-driven assembly further includes a limiting rod, one end of which is rotatably connected to the guide post, and the other end of which is rotatably connected to a limiting block. The linkage rod has a limiting groove, and the other end of the limiting rod passes through the limiting groove so that the limiting block abuts against the side of the linkage rod facing away from the guide post.

[0015] In one embodiment, a sliding groove is provided on the bottom wall of the support plate, the length direction of the sliding groove is the extension direction of the diameter of the suspension rope, and the other end of the linkage rod is disposed in the sliding groove and can slide along the length direction of the sliding groove.

[0016] A girder support lowering device includes a mounting bracket, a protective device, a lowering drive mechanism, and a lifting rope. The mounting bracket is used to install on the girder; the protective device is installed on the mounting bracket; the lowering drive mechanism is installed on a support plate; one end of the lifting rope is connected to the lowering drive mechanism, and the lowering drive mechanism is used to retract or release the lifting rope; the other end of the lifting rope passes through a first through hole and a second through hole and is connected to the girder support.

[0017] In one embodiment, the number of the lowering drive mechanism is at least four, and the number of the suspension ropes and the number of the protective devices are the same as the number of the lowering drive mechanism. Each lowering drive mechanism is correspondingly mounted on a mounting bracket and drives a suspension rope to retract or release.

[0018] The aforementioned girder support lowering equipment and its protective device have at least the following beneficial effects:

[0019] Before lowering the cap beam support, the mounting bracket is installed on the already constructed cap beam, and the protective device is installed on the mounting bracket. The lowering drive mechanism is installed on the support plate, so that the hoisting rope connected to the lowering drive mechanism passes through the first through hole of the support plate and the second through hole of the rope assembly, and is then connected to the cap beam support. During lowering, the lowering drive mechanism drives the hoisting rope to extend, thereby realizing the overall hoisting and lowering of the cap beam support. At this time, the weight of the cap beam support is transferred to the lowering drive mechanism through the hoisting rope, and the lowering drive mechanism directly applies force to the support plate. If the lowering drive mechanism goes out of control, causing the hoisting rope to suddenly fall, this will cause the force exerted by the cap beam support on the lowering drive mechanism to suddenly decrease, which in turn will cause the pressure exerted on the support plate to suddenly decrease. Because the force-driven assembly is located between the rope-holding mechanism and the support plate, the support plate can drive the force-driven assembly to push the rope-holding assembly downwards. This reduces the diameter of the second perforation formed by the various rope-holding assemblies, allowing each rope-holding assembly to grip the lifting rope tightly. This mitigates the rope's continued descent or reduces its descent speed, thereby improving the safety of the cap beam support during the overall lowering process. The aforementioned protective device has a simple structure, does not damage the lifting rope, and is easy to reuse. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the cap beam support lowering device in use in one embodiment.

[0021] Figure 2 for Figure 1 The side view of the equipment lowered under the cover beam support shown.

[0022] Figure 3 for Figure 1 A schematic diagram of the protective device in the diagram.

[0023] Figure 4 for Figure 3 A partial cross-sectional view of the protective device shown.

[0024] Figure 5 for Figure 4 The diagram shows the structure of the protective device when it is held tightly by the suspension rope.

[0025] Figure 6 for Figure 5 A schematic diagram of the rope-holding mechanism.

[0026] Figure 7 for Figure 6 The top view of the rope-holding mechanism shown.

[0027] Figure 8 for Figure 7 The cross-sectional view of the rope-holding mechanism shown.

[0028] Figure 9 for Figure 1 A schematic diagram of the clamping component in the disassembled state.

[0029] Figure 10 for Figure 9 The diagram shows the structure of the clamping assembly in the locked state.

[0030] Figure 11 for Figure 2 Partial side sectional view of the clamping assembly and the beam assembly.

[0031] Explanation of reference numerals in the attached figures:

[0032] The structure includes: a girder support lowering device 1; an installation bracket 10; a protective device 20; a force-driven mechanism 201; a support plate 210; a first through hole 211; a sliding groove 212; a force-driven assembly 220; a connecting rod 221; a sliding sleeve 222; a driving elastic element 223; a guide column 224; a limiting rod 225; a limiting block 226; a sliding wheel 227; a rope-holding mechanism 202; a fixing assembly 230; a clamping hole 231; a fixing sleeve 232; a reset element 233; a clearance groove 234; a first guide part 235; a rope-holding assembly 240; a rope-holding inclined block 241; an elastic ball 242; a second guide part 244; a compression groove 243; a second through hole 250; a clamping assembly 300; a support element 310; a support cavity 311; a moving hole 312; and a rotating cavity 3. 13; Locking hole 314; Linkage unit 320; Linkage block 321; Connector 322; Linkage rod 323; Linkage elastic element 324; Limiting protrusion 325; Rotation unit 330; Gripper 340; Second locking hole 342; Support beam 400; First locking hole 410; Positioning hole 420; Locking assembly 500; Locking plate 510; Clearance hole 512; Locking rod 520; Locking elastic element 530; Positioning post 540; Beam assembly 600; Beam piece 610; Beam part 611; Rotating part 612; Pushing part 613; Beam space 620; Linkage locking mechanism 700; Iron core 710; Coil 720; Push rod 730; Locking reset part 740; Lowering drive mechanism 30; Lifting rope 40; Cover beam bracket 2. Detailed Implementation

[0033] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0034] See Figures 1 to 3 The girder support lowering device 1 in one embodiment of this application is used to realize the overall lowering and dismantling of the girder support 2, effectively improving construction efficiency and at least ensuring construction safety. Specifically, the girder support lowering device 1 includes an installation bracket 10, a protective device 20, a lowering drive mechanism 30, and a lifting rope 40. The installation bracket 10 is used to install on the girder, the protective device 20 is installed on the installation bracket 10, the lowering drive mechanism 30 is installed on the protective device 20, one end of the lifting rope 40 is connected to the lowering drive mechanism 30, and the lowering drive mechanism 30 is used to retract or release the lifting rope 40. The other end of the lifting rope 40 passes through the protective device 20 and is connected to the girder support 2. By setting the lowering drive mechanism 30 and the lifting rope 40, the lowering of the girder support 2 can be easily realized. The protective device 20 can hold the lifting rope 40 tightly when the lowering drive mechanism 30 fails, improving the safety of lowering.

[0035] Specifically, the protective device 20 includes a force-driven mechanism 201 and a rope-holding mechanism 202. The force-driven mechanism 201 includes a support plate 210 and a force-driven assembly 220. The force-driven assembly 220 is disposed on the support plate 210, and the lowering drive mechanism 30 is mounted on the support plate 210. The support plate 210 has a first through hole 211 for the hoisting rope 40 to pass through. The rope-holding mechanism 202 is disposed below the force-driven mechanism 201. The rope-holding mechanism 202 includes a fixing assembly 230 and at least two rope-holding assemblies 240. Each rope-holding assembly 240 is spaced apart and movably disposed on the fixing assembly 230, and the inner wall of each rope-holding assembly 240 forms a second through hole 250 for the hoisting rope 40 to pass through. The other end of the hoisting rope 40 passes through the first through hole 211 and the second through hole 250 and is connected to the cap beam support 2. When the pressure applied to the support plate 210 by the lowering drive mechanism 30 decreases, the support plate 210 drives the force-driven component 220 to push the rope-holding component 240 downward, so that the diameter of the second perforation 250 formed by each rope-holding component 240 is reduced, and each rope-holding component 240 is tightly held on the suspension rope 40.

[0036] Before lowering the cap beam support 2, the mounting bracket 10 is installed on the already constructed cap beam, and the protective device 20 is installed on the mounting bracket 10. The lowering drive mechanism 30 is installed on the support plate 210 so that the hoisting rope 40 connected to the lowering drive mechanism 30 passes through the first through hole 211 of the support plate 210 and the second through hole 250 of the rope assembly 240, and is then connected to the cap beam support 2. During lowering, the lowering drive mechanism 30 drives the hoisting rope 40 to extend, thereby realizing the overall hoisting and lowering of the cap beam support 2. At this time, the weight of the cap beam support 2 is transmitted to the lowering drive mechanism 30 through the hoisting rope 40, and the lowering drive mechanism 30 directly applies force to the support plate 210. If the lowering drive mechanism 30 becomes uncontrollable, the hoisting rope 40 will suddenly fall, which will cause the force exerted on the lowering drive mechanism 30 by the cap beam support 2 to suddenly decrease, thereby causing the pressure exerted on the support plate 210 to suddenly decrease. Since the force-driven component 220 is located between the rope-holding mechanism 202 and the support plate 210, the support plate 210 can drive the force-driven component 220 to push the rope-holding component 240 downward, so that the diameter of the second perforation 250 formed by each rope-holding component 240 is reduced, thereby making each rope-holding component 240 hold tightly on the hoisting rope 40, relieving the hoisting rope 40 from continuing to fall or reducing the falling speed of the hoisting rope 40, so as to improve the safety of the cap beam support 2 during the overall lowering process.

[0037] See Figures 3 to 5 In one embodiment, the force-driven assembly 220 includes a linkage 221, a sliding sleeve 222, a driving elastic element 223, and a guide post 224. The guide post 224 is located below the support plate 210 and above the rope-holding mechanism 202. The sliding sleeve 222 is disposed on the guide post 224 and can slide between the support plate 210 and the rope-holding assembly 240. The driving elastic element 223 is disposed on the guide post 224 and is used to provide a driving elastic force to the sliding sleeve 222 toward the rope-holding assembly 240. One end of the linkage 221 is rotatably disposed on the sliding sleeve 222, and the other end is movably disposed on the support plate 210. Specifically, the guide post 224 is fixedly mounted on the mounting bracket 10. When the suspension rope 40 suddenly drops, the downward pressure on the support plate 210 will suddenly decrease, which in turn will reduce the upward force applied to the sliding sleeve 222 through the linkage rod 221. Under the action of the driving elastic element 223, the sliding sleeve 222 will move down and push the rope-holding assembly 240 down, so that the diameter of the second perforation 250 formed by the rope-holding assemblies 240 will be reduced, thereby making the rope-holding assemblies 240 hold the suspension rope 40 tightly.

[0038] During the normal lowering process of the cap beam support 2, slight changes such as swaying or tilting will cause slight changes in the force applied to the support plate 210 via the hoisting rope 40 and the lowering drive mechanism 30. Due to the elastic force of the driving elastic element 223, elastic support for the support plate 210 is achieved through the connecting rod 221 and the sliding sleeve 222, avoiding stress concentration problems caused by rigid connections. Furthermore, when the force applied to the support plate 210 does not suddenly decrease, the sliding displacement of the sliding sleeve 222 on the guide column 224 will not trigger the movement of the rope holding assembly 240.

[0039] In this embodiment, the driving elastic element 223 is a spring. During the normal lowering of the cover beam support 2, the driving elastic element 223 is compressed and stores energy, so that when the lifting rope 40 suddenly fails, it can release the stored energy to drive the sliding sleeve 222 to move down.

[0040] In this embodiment, the force-driven assembly 220 further includes a limiting rod 225. One end of the limiting rod 225 is rotatably connected to the guide post 224, and the other end of the limiting rod 225 is movably disposed on the rod portion of the connecting rod 221. Specifically, a limiting block 226 is rotatably connected to the other end of the limiting rod 225, and a limiting groove is formed in the rod portion of the connecting rod 221. The other end of the limiting rod 225 passes through the limiting groove so that the limiting block 226 abuts against the side of the connecting rod 221 facing away from the guide post 224.

[0041] In one embodiment, the number of connecting rods 221 is at least two, and each connecting rod 221 is spaced apart around the axis of the guide post 224. The number of limiting rods 225 is the same as the number of connecting rods 221, and each connecting rod 221 is connected to one connecting rod 221. For example, in this embodiment, the number of connecting rods 221 is four, and the four connecting rods 221 are arranged spaced apart around the axis of the guide post 224 to improve the stability of the sliding of the drive sleeve 222. In other embodiments, other numbers of connecting rods 221 can be provided according to force requirements, installation space requirements, etc.

[0042] In one embodiment, a sliding groove 212 is provided on the bottom wall of the support plate 210. The length direction of the sliding groove 212 is the extension direction of the diameter of the suspension rope 40. The other end of the connecting rod 221 is disposed in the sliding groove 212 and can slide along the length direction of the sliding groove 212. Specifically, the other end of the connecting rod 221 can also be provided with a sliding wheel 227 to improve the smoothness of the sliding of the connecting rod 221 in the sliding groove 212.

[0043] In other embodiments, the force-driven component 220 can also be in other structural forms, as long as it can push the rope assembly 240 downward when the force on the support plate 210 is reduced to a certain level.

[0044] See Figures 4 to 6 In one embodiment, the rope holding assembly 240 includes a rope holding wedge 241 and an elastic ball 242. The cross-sectional dimension of the rope holding wedge 241 tends to decrease along the direction away from the force-driven assembly 220. The inner wall of the rope holding wedge 241 of each rope holding assembly 240 forms a second through hole 250. The elastic ball 242 is movably disposed on the inner wall of the rope holding wedge 241 and partially protrudes from the second through hole 250. The elastic ball 242 is compressible and deformable. The fixing component 230 has a clamping hole 231. The size of the clamping hole 231 tends to decrease along the direction away from the force-driven component 220. The clamping blocks 241 of each rope clamping component 240 are movably disposed within the clamping hole 231. When the clamping blocks 241 move upward to the first position within the clamping hole 231, the elastic balls 242 on each clamping block 241 are spaced apart from the suspension rope 40. When the clamping blocks 241 move downward to the second position within the clamping hole 231, each clamping block 241 compresses the suspension rope 40 through the elastic balls 242. Figure 4 As shown, the rope-holding inclined block 241 moves upward to the first position within the clamping hole 231, as... Figure 5 As shown, the rope-holding inclined block 241 moves down to the second position within the clamping hole 231.

[0045] In the normal lowering state, the sliding sleeve 222 does not push the rope-holding inclined block 241. At this time, the rope-holding inclined block 241 is located in the first position of the clamping hole 231, and the upper end of the rope-holding inclined block 241 protrudes from the fixing component 230. The elastic ball 242 is spaced apart from the suspension rope 40 and will not interfere with the lowering of the suspension rope 40. When the suspension rope 40 has slight contact with the elastic ball 242, the elastic ball 242 can rotate relative to the rope-holding inclined block 241, and thus will not interfere with the lowering of the suspension rope 40. When the sliding sleeve 222 pushes the rope-holding inclined block 241 to the second position in the clamping hole 231, the rope-holding inclined blocks 241 move closer to each other, thereby causing the elastic ball 242 to press against the suspension rope 40. Because the elastic ball 242 is deformable, when the rope-holding block 241 is pressed against the suspension rope 40 by the elastic ball 242, the tension of the suspension rope 40 on the cover beam support 2 continues downward. The suspension rope 40 can drive the rope-holding block 241 to continue moving downward in the clamping hole 231 by squeezing and deforming the elastic ball 242. Taking advantage of the characteristic that the clamping hole 231 is a conical hole and the shape of the rope-holding block 241, the pressure pressed on the suspension rope 40 gradually increases. The inner wall of the rope-holding block 241 is in contact with the suspension rope 40 through the elastic ball 242, which increases the lateral pressure on the suspension rope 40 and the friction between the two ropes.

[0046] In one embodiment, a compression groove 243 is formed on the inner wall of the rope-holding inclined block 241. The cross-sectional dimension of the compression groove 243 tends to increase along the direction away from the force-driven component 220. The elastic ball 242 is rotatably disposed in the compression groove 243. When the elastic ball 242 is located at the bottom of the compression groove 243, a portion of the elastic ball 242 protrudes from the compression groove 243 and is located in the second through hole 250. When the sliding sleeve 222 pushes the rope-holding inclined block 241 to move so that the elastic ball 242 contacts the suspension rope 40, the friction between the elastic ball 242 and the suspension rope 40 drives the elastic ball 242 to roll upward in the compression groove 243. This makes the distance between the inner wall of the compression groove 243 and the suspension rope 40 smaller and smaller, and the degree of compression on the elastic ball 242 becomes greater and greater, resulting in greater lateral pressure and friction on the suspension rope 40 from the elastic ball 242. When the lateral pressure on the suspension rope 40 disappears, the elastic ball will fall to the bottom wall of the compression groove 243 under its own weight.

[0047] In this embodiment, the elastic ball 242 can be a rubber elastic ball that can be deformed by compression. In other embodiments, the elastic ball 242 can be other spheres that can be deformed by compression.

[0048] Specifically, each rope-holding inclined block 241 is provided with multiple elastic balls 242, which are spaced apart along the length of the suspension rope 40. Furthermore, each rope-holding inclined block 241 has multiple compression grooves 243 on its inner wall, and each elastic ball 242 is correspondingly positioned within one compression groove 243. By arranging multiple elastic balls 242 along the length of the suspension rope 40, they can simultaneously act on the suspension rope 40 at multiple locations, increasing the lateral pressure and friction applied to the suspension rope 40.

[0049] In one embodiment, the fixing component 230 includes a fixing sleeve 232 and a resetting member 233. The fixing sleeve 232 has a clamping hole 231, and the resetting member 233 is movably disposed on the inner wall of the clamping hole 231. The resetting member 233 provides a resetting elastic force to the rope-holding inclined block 241 to return it from the second position to the first position. In this embodiment, the fixing sleeve 232 is fixed to the mounting bracket 10 for stable support of the rope-holding inclined block 241. Alternatively, the fixing sleeve 232 can be directly fixed to the cap beam. The resetting member 233 provides a resetting force to the rope-holding inclined block 241. When the cap beam bracket 2 is lowered normally, it can push the rope-holding inclined block 241 upwards, thereby increasing the size of the second through hole 250 and preventing pressure on the lifting rope 40, which would affect the movement of the lifting rope 40.

[0050] Specifically, the reset component 233 includes a reset torsion spring and a reset abutment block. One end of the reset abutment block is rotatably mounted on the inner wall of the clamping hole 231 via the reset torsion spring. The reset torsion spring provides an upward rotational force to the reset abutment block, causing the other end of the reset abutment block to abut against the bottom wall of the rope-holding inclined block 241. Under the action of the reset torsion spring, the reset abutment block is driven to push the rope-holding inclined block 241 upward. In this embodiment, there are multiple reset components 233, and each rope-holding inclined block 241 is provided with at least one reset component 233.

[0051] Furthermore, a relief groove 234 is provided on the inner wall of the clamping hole 231, and the rope clamping block 241 can press the reset abutment block into the relief groove 234 so that the outer surface of the rope clamping block 241 is in stable contact with the inner wall of the clamping hole 231, ensuring the reliability of clamping the hoisting rope 40.

[0052] See Figures 6 to 8 In one embodiment, the inner wall of the clamping hole 231 is further provided with a first guide portion 235, and the rope clamping block 241 is provided with a second guide portion 244. The first guide portion 235 guides and cooperates with each other, and the guiding direction of the first guide portion 235 is the inclined direction of the inner wall of the clamping hole 231. When the reset member 233 pushes the rope clamping block 241 upward, the guiding cooperation between the first guide portion 235 and the first guide portion 235 enables each rope clamping block 241 to move away from each other. Thus, during the normal lowering process of the cap beam support 2, the distance between each rope clamping block 241 and the lifting rope 40 is maintained, avoiding interference with the lowering of the lifting rope 40.

[0053] In this embodiment, the first guide portion 235 is a protrusion provided on the inner wall of the clamping hole 231, and the first guide portion 235 is a guide groove formed on the rope clamping block 241.

[0054] In other embodiments, the first guide portion 235 can be a guide protrusion disposed between two rope-holding inclined blocks 241. The first guide portion 235 is disposed on the side of one rope-holding inclined block 241 facing the other rope-holding inclined block 241, and the first guide portion 235 is a groove. Each guide protrusion passes through the grooves of two adjacent rope-holding inclined blocks 241 simultaneously. Furthermore, the size of the first guide portion 235 gradually decreases along the vertically downward direction.

[0055] See Figure 1 and Figure 2In one embodiment, the number of lowering drive mechanisms 30 is at least four, and the number of lifting ropes 40 and protective devices 20 are consistent with the number of lowering drive mechanisms 30. Each lowering drive mechanism 30 is correspondingly mounted on a mounting bracket and drives a lifting rope 40 to retract or release. By providing at least four lowering drive mechanisms 30, the cap beam support 2 can be lifted from four different positions, improving the reliability of the lowering process. Figure 1 and Figure 2 As shown, in this embodiment, there are eight lowering drive mechanisms 30, and the eight lowering drive mechanisms 30 are arranged in pairs. A protective device 20 is provided at each location where there is no lowering drive mechanism 30.

[0056] See Figures 9 to 11 In one embodiment, the cap beam support lowering device 1 further includes a clamping assembly 300 and a supporting beam 400. The other end of the lifting rope 40 is connected to the clamping assembly 300, and the clamping assembly 300 can clamp the supporting beam 400 after being pulled by the lifting rope 40. The cap beam support 2 is placed on the supporting beam 400. Specifically, the clamping assembly 300 includes a support member 310, a linkage unit 320, two rotating units 330, and two grippers 340. The linkage unit 320 is disposed on the support member 310 and can move up and down relative to the support member 310. The upper end of the linkage unit 320 is used to connect with the lifting rope 40. The two rotating units 330 are spaced apart and rotatably disposed on the support member 310, and one end of each rotating unit 330 is rotatably connected to the linkage unit 320. Each gripper 340 is connected to the other end of a rotating unit 330. When the linkage unit 320 moves upward relative to the support member 310, it drives the two rotating units 330 to rotate relative to the support member 310, so that the two grippers 340 rotate toward each other. The support beam 400 is disposed between the two grippers 340, and the two grippers 340 can clamp onto the support beam 400 when they rotate toward each other.

[0057] In use, the lifting rope 40 pulls the linkage unit 320 upward relative to the support member 310, and simultaneously drives the two rotating units 330 to rotate relative to the support member 310, so that the two grippers 340 rotate toward each other to clamp onto the support beam 400. When the cover beam bracket 2 is lowered into place, the support beam 400 no longer applies weight to the clamping assembly 300, and the lifting rope 40 is also in a relaxed state. Consequently, the linkage unit 320 moves downward due to its own weight, driving the rotating unit 330 to rotate, which in turn drives the two grippers 340 to rotate away from each other, releasing the clamp on the support beam 400.

[0058] Specifically, the linkage unit 320 includes a linkage block 321, a connector 322, and two linkage rods 323. A support cavity 311 is formed within the support member 310. The linkage block 321 is disposed within the support cavity 311, and the connector 322 is disposed on the linkage block 321. One end of each of the two linkage rods 323 is rotatably disposed on the linkage block 321, and the other end is rotatably connected to two rotating units 330 respectively. When the linkage block 321 moves upward within the support cavity 311, the two grippers 340 clamp onto the support beam 400. The lifting rope 40 is fixedly connected to the connector 322. In use, the lifting rope 40 pulls the linkage block 321 upward within the support cavity 311 via the connector 322, which in turn drives the rotating units 330 to rotate relative to the support member 310 via the linkage rods 323, thereby causing the grippers 340 to rotate to a clamping state to clamp the support beam 400.

[0059] Specifically, the cross-sectional dimensions of the linkage block 321 tend to decrease along the vertical upward direction, and the dimensions of the support cavity 311 match the dimensions of the linkage block 321. When the linkage block 321 moves upward within the support cavity 311 and abuts against the top wall of the support cavity 311, the two grippers 340 clamp onto the support beam 400.

[0060] In one embodiment, the top wall of the support member 310 has a movable hole 312 communicating with the support cavity 311, and the connector 322 is movably inserted into the movable hole 312. By providing the movable hole 312 for the connector 322 to pass through, the movement of the linkage block 321 can be guided, ensuring the direction of movement of the linkage block 321 when the suspension rope 40 is pulled by the connector 322. Specifically, the linkage unit 320 also includes a linkage elastic element 324, which is disposed on the connector 322. The linkage elastic element 324 is used to provide a downward elastic force to the connector 322. Under the action of the linkage elastic element 324, the linkage block 321 moves downward, so as to drive the two grippers 340 to release the clamping of the support beam 400 through the linkage rod 323 and the rotating unit 330.

[0061] Furthermore, a limiting protrusion 325 is provided on the outer wall of the connector 322, and the linkage elastic element 324 is provided on the side of the limiting protrusion 325 facing away from the linkage block 321.

[0062] In one embodiment, the lowering device 1 for the cap beam support further includes a linkage locking mechanism 700. The linkage locking mechanism 700 is disposed on the clamping assembly 300. The force-driven mechanism 201 of this application is provided with a detection sensor. When the detection sensor detects that the lowering drive mechanism 30 has failed, the linkage locking mechanism 700 locks the two grippers 340 to prevent the clamping assembly 300 from being released due to the reduced tension of the lifting rope 40 when the lowering drive mechanism 30 fails. Specifically, the linkage locking mechanism 700 includes an iron core 710, a coil 720, a push rod 730, and a locking reset member 740. A locking hole 314 is provided on the inner wall of the moving hole 312. The coil 720 is sleeved on the outside of the iron core 710 and disposed in the locking hole. One end of the push rod 730 is connected to the iron core 710, and the other end is disposed towards the moving hole 312. The locking reset member 740 is used to apply a spring force to the iron core 710 and the push rod 730 to reset the push rod 730 into the locking hole. When coil 720 is energized, it drives iron core 710 to eject the other end of push rod 730 into moving hole 312. When the detection sensor detects a failure of lowering drive mechanism 30, coil 720 is energized to extend push rod 730 to the side of limit protrusion 325 of connector 322 facing linkage block 321, preventing clamping assembly 300 from resetting and causing two grippers 340 to loosen. In other embodiments, linkage locking mechanism 700 can also be formed into other structures such as electric push rod, as long as it can controllably lock two grippers 340.

[0063] In one embodiment, the detection sensor can be a pressure sensor disposed on the support plate 210, which will activate the coil 720 when a sudden decrease in pressure is detected. Alternatively, the detection sensor can be a speed sensor disposed within the first perforation 211 and / or the second perforation 250, which will activate the coil 720 when a sudden increase in the downward speed of the suspension rope 40 is detected.

[0064] like Figures 1 to 3 As shown, in one embodiment, there are two clamping components 300, which are located at both ends of the supporting beam 400, so that the cover beam bracket 2 is disposed on the supporting beam 400 and located between the two clamping components 300. By setting two clamping components 300 to clamp at both ends of the supporting beam 400, the cover beam bracket 2 can be disposed in the middle of the supporting beam 400.

[0065] See again Figures 9 to 11In one embodiment, the cap beam support lowering device 1 further includes a locking assembly 500, which includes a locking plate 510 and at least two locking rods 520. The locking plate 510 is disposed above the supporting beam 400 and is used to support the cap beam support 2. The supporting beam 400 has two spaced first locking holes 410. One end of the locking rod 520 is connected to the locking plate 510, and the other end is movably inserted into the first locking hole 410. Each gripper 340 has a second locking hole 342. When the gripper 340 is clamped on the side of the supporting beam 400 opposite to the locking plate 510, the second locking hole 342 of each gripper 340 is connected to a first locking hole 410. The locking plate 510 is moved in the direction of the supporting beam 400 so that the other end of the locking rod 520 passes through the first locking hole 410 into the second locking hole 342. Specifically, the locking assembly 500 also includes at least two locking elastic elements 530, with each locking lever 520 having a locking elastic element 530. The locking elastic element 530 is used to provide the locking lever 520 with elastic force from the support beam 400 to the locking plate 510.

[0066] like Figure 11 As shown, in one embodiment, the lowering device 1 for the cap beam support further includes a beam-holding assembly 600. The beam-holding assembly 600 includes two beam-holding members 610, which are arranged relatively spaced on the locking plate 510, and both beam-holding members 610 are rotatable relative to the locking plate 510. When the locking plate 510 presses against the supporting crossbeam 400, the two beam-holding members 610 rotate towards each other, so that the beam-holding portions of the two beam-holding members 610 form a beam-holding space 620. By providing beam-holding members 610 on the locking plate 510, the crossbeam of the cap beam support 2 can be held in place, thereby achieving a stable connection between the cap beam support 2, the supporting crossbeam 400, and the clamping assembly 300.

[0067] Specifically, the beam-holding member 610 includes a beam-holding part 611, a rotating part 612, and a pushing part 613. The rotating part 612 is rotatably mounted on the locking plate 510. The beam-holding part 611 and the pushing part 613 are both mounted on the rotating part 612. The pushing part 613 can be located below the locking plate 510 and towards the supporting beam 400, while the beam-holding part 611 is located above the locking plate 510. When the locking plate 510 is subjected to force and moves towards the supporting beam 400, the supporting beam 400 can push the pushing part 613 to rotate the beam-holding part 611 towards another beam-holding member 610, so that the beam-holding parts 611 of the two beam-holding members 610 form a beam-holding space 620.

[0068] Before use, the two beam-holding parts 611 are in an open state, and the crossbeam of the cover beam support 2 can pass between the two beam-holding parts 611. The pushing part 613 is located below the locking plate 510. When the weight of the cover beam support 2 is gradually applied to the locking plate 510, the locking plate 510 moves towards the support crossbeam 400 to push the pushing part 613 to rotate upward. Then, the rotating part 612 drives the beam-holding part 611 to rotate towards the other beam-holding part 611 until the locking plate 510 is completely pressed against the support crossbeam 400. The beam-holding space 620 formed by the two beam-holding parts 611 holds the crossbeam of the cover beam support 2, reducing the possibility of the cover beam support 2 moving relative to the support crossbeam 400 during the lowering process. After the cap beam support 2 is lowered, the locking plate 510 moves upward to reset, and the beam-holding part 610 rotates towards the supporting beam 400 under the weight of the pushing part 613, thereby causing the beam-holding part 611 to rotate and unfold in a direction away from each other, so that the beam of the cap beam support 2 can be moved out of the beam-holding space 620.

[0069] Specifically, the beam assembly 600 also includes a reset elastic element (not shown). Each beam member 610 is provided with a reset elastic element, which is used to provide a spring force to the beam member 610 to rotate the beam portion 611 in a direction away from the beam portion 611 of the other beam member 610.

[0070] like Figure 11 As shown, in one embodiment, a retaining beam 610 is disposed on the side wall of the locking plate 510 away from the locking rod 520, and the locking plate 510 has a clearance hole 512. The other retaining beam 610 is rotatably disposed within the clearance hole 512. In other embodiments, the clearance hole 512 may be omitted, and the rotating part 612 of the other retaining beam 610 is disposed on the two opposite side walls of the locking plate 510, and the rotating part 612 forms a clearance space for avoiding the locking plate 510.

[0071] In this embodiment, a positioning post 540 is also provided on the locking plate 510, and the positioning post 540 is located below the beam space 620. A positioning hole 420 is also provided on the supporting beam 400. The positioning post 540 passes through the positioning hole 420 and can move within the positioning hole 420.

[0072] The aforementioned lowering device 1 for the cap beam support places the supporting crossbeam 400 between two grippers 340. The lowering drive mechanism 30 drives the lifting rope 40 to retract upwards. Under the tension of the lifting rope 40, the two grippers 340 clamp the supporting crossbeam 400 and abut against the cap beam support 2 to be disassembled. The weight of the cap beam support 2 is applied to the locking plate 510 of the supporting crossbeam 400. The locking rod 520 gradually passes through the first locking hole 410 to the second locking hole 342 of the gripper 340, thereby locking the gripper 340 with the supporting crossbeam 400. At the same time, the supporting crossbeam 400 pushes the pushing part 613 of the beam-holding part 610 to rotate upwards, so that the beam-holding space 620 formed by the two beam-holding parts 611 holds the crossbeam of the cap beam support 2, achieving automatic locking between the grippers 340, the supporting crossbeam 400, and the cap beam support 2, ensuring the reliability of the lowering process. After the cap beam support 2 is lowered, its weight is unloaded from the locking plate 510. Under the action of the locking elastic member 530, the locking rod 520 disengages from the second locking hole 342, and the gripper 340 can rotate relative to the supporting beam 400. At the same time, the pushing part 613 of the beam-holding member 610 rotates in the direction of supporting the beam 400, causing the beam-holding part 611 to rotate and unfold in a direction away from each other.

[0073] If the drive mechanism 30 fails during the lowering process, the sliding sleeve 222 of the force-driven component 220 pushes the rope-holding inclined block 241 to move downward in the clamping hole 231, so that the elastic ball 242 contacts the rope and gradually rolls upward in the wedge-shaped compression groove 243, increasing the lateral pressure and friction with the rope 40. Conversely, the downward pull of the rope 40 is reflected by the elastic ball 242 onto the rope-holding inclined block 241, causing the rope-holding inclined block 241 to move further downward in the clamping hole 231. The gradual reduction of the second through hole 250 formed between the rope-holding inclined blocks 241 increases the elastic compression of the rope 40, preventing the rope 40 from continuing to fall or reducing the falling speed of the rope 40, thereby improving the safety of the cap beam support 2 during the overall lowering process.

[0074] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0075] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0076] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0077] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A protective device for a girder support lowering device, characterized in that, The protective device includes: A force-driven mechanism includes a support plate and a force-driven assembly. The force-driven assembly is disposed on the support plate, which supports the lowering drive mechanism. A first through hole is provided on the support plate for the suspension rope to pass through. The force-driven assembly includes a connecting rod, a sliding sleeve, a driving elastic element, and a guide post. The guide post is located below the support plate. The sliding sleeve is disposed on the guide post. The driving elastic element is disposed on the guide post. One end of the connecting rod is rotatably disposed on the sliding sleeve, and the other end is movably disposed on the support plate. The system includes a rope-holding mechanism, which is positioned below the force-driven mechanism so that the guide post is positioned above the rope-holding mechanism. The rope-holding mechanism includes a fixing component and at least two rope-holding assemblies. Each rope-holding assembly is spaced apart and movably mounted on the fixing component. The sliding sleeve is slidable between the support plate and the rope-holding assembly. The driving elastic element provides a driving elastic force to the sliding sleeve toward the rope-holding assembly. Each rope-holding assembly includes a rope-holding wedge and an elastic ball. The cross-sectional dimension of the rope-holding wedge tends to decrease along the direction away from the force-driven component. The inner wall of the rope-holding wedge of each rope-holding assembly forms a second through hole for the rope to pass through. The elastic ball is movably mounted on the inner wall of the rope-holding wedge and partially protrudes from the second through hole. The elastic ball is compressible and deformable. The fixing component has a clamping hole, the size of which tends to decrease along the direction away from the force-driven component. The rope-holding wedges of each rope-holding assembly are movably mounted within the clamping hole. When the pressure applied to the support plate by the lowering drive mechanism decreases, the support plate drives the force-driven component to push the rope-holding component down to the second position. The rope-holding wedges move down in the clamping hole to reduce the diameter of the second through hole. Each of the rope-holding wedges is squeezed by the elastic ball to clamp the suspension rope. When the rope-holding wedges move up to the first position in the clamping hole, the elastic balls on each rope-holding wedge are spaced apart from the suspension rope.

2. The protective device for the lowering equipment of the cap beam support according to claim 1, characterized in that, A compression groove is provided on the inner wall of the rope-holding inclined block. The cross-sectional dimension of the compression groove tends to increase along the direction away from the force-driven component. The elastic ball is rotatably disposed in the compression groove. When the elastic ball is located at the bottom of the compression groove, part of the elastic ball protrudes from the compression groove and is located in the second perforation.

3. The protective device for the lowering equipment of the cap beam support according to claim 2, characterized in that, Each of the rope-holding inclined blocks is provided with a plurality of elastic balls, which are spaced apart along the length of the rope. Each of the rope-holding inclined blocks has a plurality of compression grooves on its inner wall, and each elastic ball is correspondingly disposed in one of the compression grooves.

4. The protective device for the lowering equipment of the cap beam support according to claim 1, characterized in that, The fixing component includes a fixing sleeve and a resetting member. The fixing sleeve has a clamping hole, and the resetting member is movably disposed on the inner wall of the clamping hole. The resetting member provides the rope clamping block with a resetting elastic force to reset from the second position to the first position.

5. The protective device for the lowering equipment of the cap beam support according to claim 4, characterized in that, The inner wall of the clamping hole is also provided with a first guide portion, and the rope clamping block is provided with a second guide portion. The first guide portion and the second guide portion guide and cooperate with each other, and the guiding direction of the first guide portion is the inclined direction of the inner wall of the clamping hole.

6. The protective device for the lowering equipment of the cap beam support according to claim 5, characterized in that, The reset component includes a reset torsion spring and a reset abutment block. One end of the reset abutment block is rotatably mounted on the inner wall of the clamping hole via the reset torsion spring. The reset torsion spring provides an upward rotational force to the reset abutment block so that the other end of the reset abutment block abuts against the bottom wall of the rope clamping block. An clearance groove is provided on the inner wall of the clamping hole, and the rope clamping block can press the reset abutment block into the clearance groove.

7. The protective device for the lowering equipment of the cap beam support according to any one of claims 1-6, characterized in that, The force-driven assembly also includes a limiting rod, one end of which is rotatably connected to the guide post, and the other end of which is rotatably connected to a limiting block. The linkage rod has a limiting groove, and the other end of the limiting rod passes through the limiting groove so that the limiting block abuts against the side of the linkage rod facing away from the guide post.

8. The protective device for the lowering equipment of the cap beam support according to any one of claims 1-6, characterized in that, A sliding groove is provided on the bottom wall of the support plate. The length direction of the sliding groove is the extension direction of the diameter of the suspension rope. The other end of the linkage rod is located in the sliding groove and can slide along the length direction of the sliding groove.

9. A device for lowering a cap beam support, characterized in that, The girder support lowering device includes: Mounting bracket, which is used for mounting on the cap beam; The protective device as described in any one of claims 1-8, wherein the protective device is mounted on the mounting bracket; The lowering drive mechanism and the hoisting rope are provided. The lowering drive mechanism is mounted on the support plate. One end of the hoisting rope is connected to the lowering drive mechanism. The lowering drive mechanism is used to retract or release the hoisting rope. The other end of the hoisting rope passes through the first through hole and the second through hole and is connected to the cover beam bracket.

10. The cap beam support lowering device according to claim 9, characterized in that, The number of the lowering drive mechanisms is at least four, and the number of the suspension ropes and the number of the protective devices are the same as the number of the lowering drive mechanisms. Each lowering drive mechanism is correspondingly mounted on a mounting bracket and drives a suspension rope to retract or release.

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