A special lifting tool for erecting precast cap beams.

Abstract

A specialized lifting device for erecting precast cap beams includes two frames arranged symmetrically front to back. Two adjusting frames are located at the top of each frame, with their bottoms engaging with the tops of the frames. Each adjusting frame has a lifting plate at its top. Two support rods are positioned between the two adjusting frames. Inside each adjusting frame are two boxes arranged symmetrically left to right. Nuts are located at the top of each box, and a control component is located at the bottom of each nut. A crossbar is located at the bottom of the control component, engaging with the frame. A baffle is located on the top inner side of the control component. This device solves the problems of existing precast cap beam lifting devices where the fixed rope connection points make it difficult to adjust the spacing according to the cap beam size, easily leading to uneven stress. Furthermore, the fixed frame size makes large cap beams prone to localized damage, while small cap beams require heavy and unstable lifting devices, increasing costs and management difficulties.

Description

Technical Field

[0001] This utility model relates to the field of hoisting technology, and in particular to a special hoisting tool for erecting precast cap beams. Background Technology

[0002] In the field of bridge construction engineering, precast cap girders, as key load-bearing components in bridge structures, have a crucial impact on the safety, stability, and schedule of the entire bridge project due to their erection quality and construction efficiency. With the continuous development and advancement of bridge construction technology, the specifications and dimensions of precast cap girders are becoming increasingly diverse to adapt to the needs of bridge construction in different geographical environments, traffic flows, and design requirements. At the same time, in order to improve construction efficiency and ensure construction quality, higher requirements are placed on the specialized lifting equipment used for erecting precast cap girders. Efficient, safe, flexible, and highly adaptable lifting equipment has become one of the key factors ensuring the successful erection of precast cap girders.

[0003] Most existing precast cap beam lifting devices use relatively fixed methods for fixing the lifting ropes. Many devices are designed with pre-defined rope connection points, employing rigid connections such as welding or bolting. For example, in some truss-type lifting devices, the lifting ropes are directly bolted to specific nodes of the truss, and the node positions cannot be adjusted after the lifting device is manufactured. When lifting precast cap beams of different widths or lengths, the inability to flexibly adjust the rope spacing according to the actual dimensions of the cap beam prevents the lifting device from achieving optimal stress matching with the cap beam.

[0004] If the spacing between the lifting ropes is too small, the ropes may interfere with the edge of the cap beam during lifting, scratching the surface and affecting its appearance and service life. If the spacing is too large, the cap beam will be subjected to uneven force during lifting, increasing the risk of tilting or slipping, seriously threatening the lives of construction workers and the safety of the surrounding environment. Furthermore, to accommodate cap beams of different sizes, construction units often need to prepare multiple sets of lifting equipment of different specifications. This not only increases equipment procurement costs but also occupies a large amount of storage space, causing numerous inconveniences for construction management.

[0005] Existing precast cap beam lifting frame structures typically employ fixed-size designs. Taking gantry cranes as an example, the length and width of their crossbeams and columns are determined during manufacturing and cannot be adjusted on-site based on the actual dimensions of the precast cap beam being lifted. When encountering large precast cap beams, the fixed-size lifting frame may not be able to completely cover the beam, leading to excessive localized stress on the beam during lifting and potentially causing structural damage. Conversely, for smaller precast cap beams, the lifting frame becomes excessively large, increasing the weight of the lifting equipment, reducing lifting efficiency, and affecting the stability of the lifting process due to excessive frame sway. Utility Model Content

[0006] In view of the above situation and to overcome the defects of the prior art, this utility model provides a special lifting tool for the erection of precast cap beams. This application effectively solves the problems of existing precast cap beam lifting tools, such as the fixed connection points of the lifting ropes making it difficult to adjust the spacing according to the size of the cap beam, which easily leads to uneven stress. In addition, the fixed frame size makes large-sized cap beams prone to local damage, while small-sized cap beams are cumbersome and unstable, increasing costs and management difficulties.

[0007] To achieve the above objectives, this utility model provides the following technical solution: This utility model includes two frames, which are arranged symmetrically front to back. Two adjustment frames are provided on the top of the two frames, which are also arranged symmetrically front to back. The bottom of the adjustment frames cooperates with the top of the frames. Each adjustment frame is provided with a hanging plate on its top. Two support rods are provided between the two adjustment rods, which are arranged symmetrically left to right. The adjustment frame has two boxes inside, which are arranged symmetrically from left to right. The top of each box is equipped with a nut, the bottom of the nut is equipped with a control component, the bottom of the control component is equipped with a crossbar, the crossbar cooperates with the frame, and the top of the inner side of the control component is equipped with a baffle.

[0008] Preferably, the outer side of the support rod is provided with multiple screws, which pass through the support rod and connect to the adjustment frame.

[0009] Preferably, the control component includes a threaded rod, the top of which is fixedly connected to a nut, and the nut is rotatably connected to the housing.

[0010] Preferably, the bottom of the threaded rod is provided with a movable block, and the top side inside the movable block is provided with two first hydraulic cylinders. The two first hydraulic cylinders are arranged diagonally, and the inside of the first hydraulic cylinder is provided with a right-angle rod. The bottom outer side of the right-angle rod is fixedly connected to the box body.

[0011] Preferably, the inner side of the first hydraulic cylinder is provided with a hydraulic pipe, and the bottom of the hydraulic pipe is provided with a second hydraulic cylinder, which cooperates with the crossbar.

[0012] Preferably, the top inner side of the movable block is connected to the bottom of the baffle.

[0013] Compared with the prior art, the beneficial effects of this utility model are: Highly adaptable: The frame has grooves, and the adjustment frame can move flexibly inward or outward on them. With the help of multiple recesses on the inner side of the adjustment frame and the insertion of support rods and screw fixation, the distance between the adjustment frame and the support rods can be flexibly changed, easily adapting to the hoisting tasks of cap beams of different sizes.

[0014] Stable hoisting: The top of the hoisting plate has multiple cylindrical through holes to facilitate the passage of hoisting ropes. The angle of the hoisting ropes can be adjusted according to actual needs, which improves the adaptability of the device, ensures the stability of the hoisting process, and meets the needs of diverse cap beam hoisting scenarios.

[0015] Secure connection: The adjustment frame has a box inside. By rotating the nut, the threaded rod is rotated, which makes the moving block rise and fall vertically. The first hydraulic cylinder, the right-angle rod, the hydraulic pipe and the second hydraulic cylinder work together to push the crossbar out and lock it into the frame, ensuring that the adjustment frame and the frame are tightly connected. At the same time, the moving block drives the baffle to move down and tighten the screws to prevent the screws from coming loose during hoisting, further ensuring the security of the connection.

[0016] Easy to disassemble and transport: When the adjustment frame and the frame are not connected, the moving block is hidden inside the box. At this time, the frame, adjustment frame and support rod and other components can be disassembled, which is convenient for stacking and transportation, reducing transportation costs and storage difficulties. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 This is a three-dimensional schematic diagram of the support rod of this utility model.

[0019] Figure 3 This is a schematic diagram of the cooperation structure between the crossbar and the baffle of this utility model.

[0020] Figure 4 This is a schematic diagram of the cross-sectional structure of the box body of this utility model.

[0021] Figure 5 This is a schematic diagram of the nut and crossbar mating structure of this utility model.

[0022] The following are the labeling elements in the diagram: 101, Frame; 102, Adjustment Frame; 103, Hanging Plate; 104, Support Rod; 105, Screw; 201, Baffle; 202, Box Body; 203, Nut; 204, Threaded Rod; 205, Moving Block; 206, Right Angle Rod; 207, First Hydraulic Cylinder; 208, Hydraulic Pipe; 209, Second Hydraulic Cylinder; 210, Crossbar. Detailed Implementation

[0023] The following is in conjunction with the appendix Figures 1-5 The specific embodiments of this utility model will be described in further detail.

[0024] This utility model includes two frames 101 arranged symmetrically front to back. Two adjusting frames 102 are located at the top of each frame 101, also symmetrically arranged. The bottom of each adjusting frame 102 engages with the top of the frame 101. Each adjusting frame 102 has a hanging plate 103 at its top, providing a support point for hoisting operations. Two support rods 104 are located between the two adjusting frames, arranged symmetrically left to right. Grooves are provided on the frames 101, allowing the two adjusting frames 102 to move flexibly inwards or outwards simultaneously to accommodate different size requirements. Multiple screws 105 are provided on the outer side of the support rods 104, passing through them and connecting them to the adjusting frames 102. Multiple recesses are provided on the inner side of the adjusting frames 102, allowing the support rods 104 to be precisely inserted into these recesses and then fixed by the screws 105, ensuring a secure and reliable connection. By flexibly adjusting the distance between the adjusting frame 102 and the support rod 104, this device can easily adapt to lifting tasks of different sizes of cap beams. In addition, the top of the lifting plate 103 is provided with multiple cylindrical through holes to facilitate the passage of lifting ropes. Different lifting rope angles can be adjusted according to actual needs, further improving the adaptability and lifting stability of the device and meeting the diverse needs of cap beam lifting scenarios.

[0025] The adjusting frame 102 has two boxes 202 inside, which are arranged symmetrically on the left and right. The boxes 202 are fixedly connected to the adjusting frame 102. The top of the box 202 is provided with a nut 203, which is rotatably connected to the box 202. The bottom of the nut 203 is provided with a control component, and the bottom of the control component is provided with a crossbar 210. The crossbar 210 cooperates with the frame 101. The control component can make the crossbar 210 extend laterally from the box 202. The extended crossbar 210 interlocks with the frame 101, thereby making the adjusting frame 102 and the frame 101 tightly connected. The top of the inner side of the control component is provided with a baffle 201. The top of the inner side of the moving block 205 is connected to the bottom of the baffle 201. The baffle 201 can also be controlled to move downward to press the top of multiple screws 105 to prevent the screws 105 from loosening during hoisting.

[0026] The control component includes a threaded rod 204, the top of which is fixedly connected to a nut 203. The nut 203 is rotatably connected to the housing 202. A movable block 205 is provided at the bottom of the threaded rod 204. Rotation of the nut 203 can drive the threaded rod 204 to rotate. Since the position of the threaded rod 204 remains unchanged, it can drive the threaded movable block 205 to move vertically up and down. Two first hydraulic cylinders 207 are provided on the top side inside the movable block 205. The two first hydraulic cylinders 207 are arranged diagonally. A right-angle rod 206 is provided inside the first hydraulic cylinder 207. Hydraulic oil is provided inside the first hydraulic cylinder 207. When the movable block 205 moves downward, the bottom outer side of the right-angle rod 206 is connected to the housing. 202 is fixedly connected. Since the right-angle rod 206 is fixedly connected to the box body 202, the right-angle rod 206 will squeeze the space inside the first hydraulic cylinder 207. The inner side of the first hydraulic cylinder 207 is provided with a hydraulic pipe 208, and the bottom of the hydraulic pipe 208 is provided with a second hydraulic cylinder 209. The second hydraulic cylinder 209 cooperates with the crossbar 210 to squeeze the hydraulic oil inside the first hydraulic cylinder 207 into the second hydraulic cylinder 209 through the hydraulic pipe 208. Then, the crossbar 210 is pushed to extend out from the inside of the moving block 205 and complete the snap-fit ​​with the frame 101 to ensure the stability of the frame 101. Since the frame 101 does not need to bear the weight, this snap-fit ​​method is relatively secure.

[0027] In other words, when the adjustment frame 102 is not connected to the frame 101, the moving block 205 is hidden inside the box 202. At this time, the frame 101, adjustment frame 102 and support rod 104 can be disassembled for easy stacking and transportation.

[0028] When the frame 101 needs to be connected, first adjust the distance between the two adjustment frames 102, then rotate the nut 203 to move the moving block 205 downward. During the movement, the two crossbars 210 inside the box 202 extend out and then engage with the inside of the adjustment frame 102 to achieve a basic engagement between the adjustment frame 102 and the frame 101.

[0029] Then, adjust the distance between the support rods 104, and fix the support rods 104 between the adjustment frames 102 with screws 105. Continue to rotate the nut 203 so that the crossbar 210 extends fully and engages with the frame 101. At the same time, the moving block 205 drives the baffle 201 to move downward to abut against the side of the upper screw 105, preventing the screw 105 from loosening due to shaking during hoisting, and ensuring the safety of hoisting.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A special lifting tool for erecting precast cap beams, comprising two frames (101) arranged symmetrically front to back, characterized in that, Two adjustment frames (102) are provided on the top of the two frames (101). The two adjustment frames (102) are arranged symmetrically front and back. The bottom of the adjustment frame (102) cooperates with the top of the frame (101). Each adjustment frame (102) is provided with a hanging plate (103) on the top. Two support rods (104) are provided between the two adjustment rods. The two support rods (104) are arranged symmetrically left and right. The adjustment frame (102) has two boxes (202) inside, which are arranged symmetrically on the left and right. The top of the box (202) is provided with a nut (203), the bottom of the nut (203) is provided with a control component, the bottom of the control component is provided with a crossbar (210), the crossbar (210) cooperates with the frame (101), and the top of the inner side of the control component is provided with a baffle (201).

2. The special lifting tool for erecting precast cap beams according to claim 1, characterized in that, The support rod (104) is provided with a plurality of screws (105) on its outer side, and the screws (105) pass through the support rod (104) and are connected to the adjustment frame (102).

3. A special lifting tool for erecting precast cap beams according to claim 1, characterized in that, The control component includes a threaded rod (204), the top of which is fixedly connected to a nut (203), and the nut (203) is rotatably connected to the housing (202).

4. A special lifting tool for erecting precast cap beams according to claim 3, characterized in that, The bottom of the threaded rod (204) is provided with a movable block (205). The top side of the interior of the movable block (205) is provided with two first hydraulic cylinders (207). The two first hydraulic cylinders (207) are arranged diagonally. The interior of the first hydraulic cylinder (207) is provided with a right-angle rod (206). The bottom outer side of the right-angle rod (206) is fixedly connected to the box body (202).

5. A special lifting tool for erecting precast cap beams according to claim 4, characterized in that, The first hydraulic cylinder (207) has a hydraulic pipe (208) on its inner side, and a second hydraulic cylinder (209) is provided at the bottom of the hydraulic pipe (208). The second hydraulic cylinder (209) cooperates with the crossbar (210).

6. A special lifting tool for erecting precast cap beams according to claim 5, characterized in that, The top inner side of the movable block (205) is connected to the bottom of the baffle (201).

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