Lifting appliance suitable for large-weight box girder
By designing an adjustable steel rod socket structure and a spreader with anti-pinning device, the problem of difficult adjustment of the lifting angle and weak contact between the steel wire rope during the lifting of large-weight box girders is solved, and flexible adjustment of the lifting angle and effective protection of the box girders are achieved.
Patent Information
- Application Number
- CN202421541425.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-01
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-07-01
AI Technical Summary
In the prior art, the lifting of large-weight box beams has problems such as difficult to adjust the lifting angle of the wire rope and the weak contact between the wire rope and the beam.
A spreader suitable for large-weight box girders is designed, using an adjustable steel rod socket structure and anti-pinning device. The connecting method of the sockets at different positions is selected by the steel rod to change the lifting angle, and the box girder is directly connected to the box girder through the box girder connection assembly to avoid contact with the wire rope.
It realizes flexible adjustment of lifting angle, improves lifting safety and convenience, and protects the box beam to avoid damage caused by direct contact between the wire rope and the beam.
Smart Images
Figure CN222794938U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a municipal construction auxiliary tool, in particular to a hoisting device suitable for a heavy-weight box beam. Background Art
[0002] Box girder is a common beam type in bridge structure. Its cross-sectional shape is similar to a box, that is, it is a closed hollow structure composed of top, bottom and two side plates. Box girder has high bearing capacity, good torsion resistance, and reduces the use of materials due to its hollow structure. During construction, box girders can be prefabricated and then hoisted and spliced on site, which can speed up the construction progress and reduce on-site operation time. Box girders can be designed in different sizes and shapes according to different span and load requirements to meet the needs of various bridge projects. Box girders are widely used in modern bridge construction, especially in projects such as long-span bridges, highway bridges, urban viaducts and railway bridges. Therefore, it is necessary to ensure the smooth construction of heavy box girders.
[0003] In the prior art, heavy box girders are usually hoisted by lifting the bottom of the beam with a wire rope. This technology has the following disadvantages: (1) the lifting angle of the wire rope is difficult to adjust, and there will be safety issues when the angle is small; (2) the weak points where the wire rope contacts the beam will cause damage to the quality of the beam and increased wear of the wire rope.
[0004] Therefore, a special lifting device for heavy box girders is needed, which can not only protect the box girders but also increase the safety and convenience of lifting. Utility Model Content
[0005] In view of the technical problems existing in the prior art, the purpose of the utility model is to provide a hoisting device with a variable hoisting angle suitable for heavy-weight box girders.
[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0007] A hoisting device suitable for heavy-weight box girders comprises a hoisting frame, a box girder connecting assembly, a steel rod and an anti-drop pin; the hoisting frame is a rectangular box structure, the left section and the right section of the hoisting frame are each provided with a group of sockets, each group of sockets comprises at least two sockets arranged in sequence along the left-right direction, and each socket passes through the hoisting frame front and back; corresponding to a group of sockets, a steel rod is inserted into one of the sockets, the steel rod is connected to a steel wire rope, and the upper end of the hoisting frame is provided with a strip hole covering all the sockets in the group of sockets, and the strip hole is for the steel wire rope to pass through; radial through holes are provided at both ends of the steel rod exposed from the hoisting frame, and an anti-drop pin is inserted into each radial through hole; the box girder connecting assembly for connecting the box girder is installed on the hoisting frame.
[0008] As a preferred embodiment, the two groups of sockets are symmetrically arranged, and the box girder connection assembly is located between the two groups of sockets.
[0009] As a preferred embodiment, the anti-drop pin is a steel rod bent into a "7" shape.
[0010] As a preferred embodiment, the end of the wire rope is folded back after passing around the steel rod and is locked by a wire rope clamp.
[0011] As a preference, the hanging frame comprises a load-bearing frame, a top plate, a bottom plate, and four side plates, wherein the top plate is arranged at the upper end of the load-bearing frame, the bottom plate is arranged at the lower end of the load-bearing frame, and the side plates are arranged on the inner side of the load-bearing frame.
[0012] As a preference, the load-bearing frame includes an upper frame, a lower frame, and a plurality of vertical load-bearing rods arranged between the upper frame and the lower frame.
[0013] As a preferred embodiment, the box girder connection assembly includes a screw rod, and also includes a first gasket, a second gasket, a first nut, and a second nut which are sleeved outside the screw rod; the screw rod passes through the lifting frame from top to bottom, and a first gasket is provided between the head of the screw rod and the upper end of the lifting frame, and the second gasket, the first nut, and the second nut are tightly arranged in sequence from top to bottom, and the second gasket is used to cooperate with the box girder.
[0014] As a preference, for each screw rod, the number of the first gasket and the number of the second gasket are both two.
[0015] As a preference, the number of box girder connection assemblies is at least two groups, which are arranged sequentially along the left-right direction.
[0016] As a preferred embodiment, two hangers are installed corresponding to each box girder section.
[0017] The utility model has the following advantages:
[0018] 1. By selecting the connection method of the sockets in different positions of the steel rod, the distance between the two steel rods can be changed, thereby changing the lifting angle, improving the safety during lifting, and improving work efficiency.
[0019] 2. The anti-drop pin structure makes the steel rod easy to install and disassemble, and can also prevent the steel rod from falling off to ensure safety.
[0020] 3. Using box girder connection components, the box girders are connected to each other instead of contacting with the wire rope, which effectively protects the box girder.
[0021] 4. The first gasket is used to effectively protect the upper end of the lifting frame; the second gasket is used to effectively protect the box girder, increase the contact area and reduce local pressure.
[0022] 5. Double nut structure is adopted to improve safety. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a stereogram of a lifting device suitable for heavy-weight box girders.
[0024] Figure 2 It is a stereoscopic image from another perspective of a sling suitable for heavy box girders.
[0025] Figure 3 This is a partial enlarged view of the spreader.
[0026] In the figure, 1 is a screw rod, 2 is a first gasket, 3 is a second gasket, 4 is an anti-drop pin, 5 is a steel rod, 6 is a wire rope clamp, 7 is a wire rope, 8 is a lifting frame, 9 is a first nut, 10 is a second nut, 11 is a first socket, and 12 is a second socket. DETAILED DESCRIPTION
[0027] The present invention will be further described in detail below in conjunction with specific implementation methods.
[0028] A hoisting device suitable for heavy-weight box girders includes a hoisting frame, a box girder connection assembly, a steel rod, and an anti-drop pin; the hoisting frame is a rectangular box structure, and the left and right sections of the hoisting frame are each provided with a group of sockets, each group of sockets includes at least two sockets arranged in sequence along the left and right directions, and each socket passes through the hoisting frame from front to back; corresponding to a group of sockets, a steel rod is inserted into one of the sockets, and the steel rod is connected to a steel wire rope, and the upper end of the hoisting frame is provided with a strip hole covering all the sockets in the group of sockets, and the strip hole is for the steel wire rope to pass through; the front and rear ends of the steel rod exposed from the hoisting frame are provided with radial through holes, and each radial through hole is inserted with an anti-drop pin; the box girder connection assembly for connecting the box girder is installed on the hoisting frame. In this embodiment, each group of sockets includes a first socket located on the outside and a second socket located on the inside.
[0029] The two groups of sockets are symmetrically arranged, and the box beam connection component is located between the two groups of sockets.
[0030] The anti-drop pin is a steel rod bent into a "7" shape, with a smooth transition between the two bent sections through an arc. When inserting the steel rod, try to make the radial through hole in a position that penetrates from top to bottom, and insert the anti-drop pin from top to bottom, so that the anti-drop pin is not easy to fall out.
[0031] The end of the wire rope is folded back after passing around the steel rod and is locked by a wire rope clamp. Thus, the end of the wire rope is arranged in a ring shape for the steel rod to pass through.
[0032] The hanging frame comprises a load-bearing frame, a top plate, a bottom plate, and four side plates. The top plate is arranged at the upper end of the load-bearing frame, the bottom plate is arranged at the lower end of the load-bearing frame, and the side plates are arranged at the inner side of the load-bearing frame.
[0033] The load-bearing frame comprises an upper frame, a lower frame, and a plurality of vertical load-bearing rods arranged between the upper frame and the lower frame, thereby strengthening the rigidity of the load-bearing frame.
[0034] The box beam connection assembly includes a screw rod, and also includes a first gasket, a second gasket, a first nut, and a second nut sleeved on the outside of the screw rod; the screw rod passes through the lifting frame from top to bottom, and a first gasket is arranged between the head of the screw rod and the upper end of the lifting frame. The second gasket, the first nut, and the second nut are arranged tightly in sequence from top to bottom, and the second gasket is used to cooperate with the box beam.
[0035] For each screw rod, the number of the first gasket and the number of the second gasket are both two, and the two gaskets are stacked to increase rigidity.
[0036] The number of box beam connection components is at least two groups, which are arranged in sequence along the left-right direction.
[0037] Two hoists are installed corresponding to each section of box girder, and the two hoists are arranged front and back.
[0038] The operation mode of the utility model is:
[0039] In the initial state, the two steel rods are inserted into the two first sockets and locked by anti-drop pins to prevent the steel rods from falling off, and the two steel wire ropes are sleeved on the two steel rods. The screw rod passes through the hanging frame from top to bottom, and a first gasket is placed between the head of the screw rod and the hanging frame.
[0040] A hoisting hole is reserved at the top of the heavy box beam. During hoisting, the lower end of the screw rod passes through the hoisting hole, and then the second gasket is inserted, and the first nut and the second nut are tightened. The second gasket protects the inner side of the box beam.
[0041] The box girder is lifted by hooking the wire rope through the lifting machinery.
[0042] When the lifting angle is too small and there is a safety hazard, the steel rod can be removed from the first socket and installed in the second socket.
[0043] In addition to the methods mentioned in this embodiment, a group of sockets can include three, four or other numbers of sockets. The number of box beam connection components can be three or other numbers. These variations are all within the protection scope of the present utility model.
[0044] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited by the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principle of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.
Claims
1. A sling suitable for heavy box beams, characterized in that: It includes a lifting frame, a box beam connection component, a steel rod, and an anti-drop pin; the lifting frame is a rectangular box structure, and the left section and the right section of the lifting frame are each provided with a group of sockets, each group of sockets includes at least two sockets arranged in sequence along the left and right directions, and each socket passes through the lifting frame front and back; corresponding to a group of sockets, a steel rod is inserted into one of the sockets, the steel rod is used for steel wire rope connection, and the upper end of the lifting frame is provided with a strip hole covering all the sockets in the group of sockets, and the strip hole is used for the steel wire rope to pass through; radial through holes are provided at the front and rear ends of the steel rod exposed from the lifting frame, and an anti-drop pin is inserted into each radial through hole; the box beam connection component for connecting the box beam is installed on the lifting frame.
2. A sling suitable for heavy-weight box beams according to claim 1, characterized in that: The two groups of sockets are symmetrically arranged, and the box beam connection component is located between the two groups of sockets.
3. A sling suitable for heavy-weight box beams according to claim 1, characterized in that: The anti-drop pin is a steel rod bent into a "7" shape.
4. A sling suitable for heavy-weight box beams according to claim 1, characterized in that: The end of the wire rope is folded back after passing over the steel rod and locked by a wire rope clamp.
5. A sling suitable for heavy-weight box beams according to claim 1, characterized in that: The hanging frame comprises a load-bearing frame, a top plate, a bottom plate, and four side plates. The top plate is arranged at the upper end of the load-bearing frame, the bottom plate is arranged at the lower end of the load-bearing frame, and the side plates are arranged at the inner side of the load-bearing frame.
6. A sling suitable for heavy-weight box beams according to claim 5, characterized in that: The load-bearing frame comprises an upper frame, a lower frame, and a plurality of vertical load-bearing rods arranged between the upper frame and the lower frame.
7. A sling suitable for heavy-weight box beams according to claim 1, characterized in that: The box beam connection assembly includes a screw rod, and also includes a first gasket, a second gasket, a first nut, and a second nut sleeved on the outside of the screw rod; the screw rod passes through the lifting frame from top to bottom, and a first gasket is arranged between the head of the screw rod and the upper end of the lifting frame. The second gasket, the first nut, and the second nut are arranged tightly in sequence from top to bottom, and the second gasket is used to cooperate with the box beam.
8. A sling suitable for heavy-weight box beams according to claim 7, characterized in that: For each screw rod, the number of the first gasket and the number of the second gasket are both two.
9. A sling suitable for heavy-weight box beams according to claim 1, characterized in that: The number of the box beam connection components is at least two groups, which are arranged in sequence along the left-right direction.
10. A sling suitable for heavy-weight box beams according to claim 1, characterized in that: Two hangers are installed on each section of box girder.