Load reduction device for steel box girder hoisting construction

Abstract

The utility model provides a load reduction device for steel box girder hoisting construction, which belongs to the technical field of steel box girder hoisting and comprises a top plate and a bottom plate, the top plate and the bottom plate are horizontally arranged up and down, an air bag is arranged between the top plate and the bottom plate, and a plurality of telescopic rods for assisting in supporting the air bag are vertically arranged on the peripheral side of the air bag. According to the load reduction device for steel box girder hoisting construction, the effects of damping, buffering and load reduction are achieved through the arranged load reduction device, and therefore the problem that when a crane travels to hoist a steel box girder, the load of tires on the road surface is too large, and the road surface is damaged is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel box girder hoisting, and particularly relates to a load reduction device for steel box girder hoisting construction. Background Art

[0002] Steel box girders, also known as steel plate box girders, are a common structural form for long-span bridges. They are typically used on bridges with large spans and are so-called steel box girders because of their box-like appearance. Currently, the installation of steel box girders requires the use of cranes during centralized construction. However, when the crane is hoisting the steel box girder, the tires exert excessive load on the road surface, causing damage. Therefore, a load-reducing device for steel box girder installation is being developed to address this problem. Utility Model Content

[0003] To achieve the above-mentioned purpose, the utility model provides a load reduction device for steel box girder lifting construction, including a top plate and a bottom plate, the top plate and the bottom plate are horizontally arranged one above the other, an airbag is provided between the top plates, and a number of telescopic rods are vertically provided around the airbag to assist in supporting the airbag.

[0004] Furthermore, a plurality of the telescopic rods are evenly arranged along the length direction and the width direction of the top plate with the airbag as the center.

[0005] Furthermore, the telescopic rod includes an inner rod and an outer rod, both of which are hollow and have openings facing upwards, the inner rod slides vertically inside the outer rod, the upper end of the inner rod is fixed to the lower surface of the top plate, and the lower end of the outer rod is fixed to the upper surface of the bottom plate.

[0006] Furthermore, the telescopic rod is provided with a self-locking assembly, which includes a vertical connecting rod, the connecting rod is located on the left side of the inner rod, a spring is horizontally provided at the right side of the upper end of the connecting rod, the left end of the spring is fixedly connected to the connecting rod, and the right end of the spring is fixedly connected to the inner side wall of the inner rod, a first through hole is horizontally opened on the left side wall of the upper end of the inner rod, a connecting block is horizontally provided in the first through hole, the right end of the connecting block is fixedly connected to the left side wall of the upper end of the connecting rod, and the left end of the connecting block is fixedly connected to a button;

[0007] A second through hole is horizontally opened on the left side wall of the lower end of the inner rod, and a clamping block is arranged in the second through hole. The right side of the clamping block is fixedly connected to the left side wall of the lower end of the connecting rod.

[0008] Furthermore, the vertical cross-section of the block is a right-angled trapezoid, the inclined surface of the block is located on the left, the longest side of the block is located on the bottom, and the length of the longest side of the block is greater than the sum of the wall thickness of the inner rod and the wall thickness of the outer rod.

[0009] Furthermore, a sealing cover is horizontally provided at the opening at the upper end of the inner rod, the upper surface of the sealing cover is fixedly connected to the lower surface of the top plate, and a downwardly protruding boss is provided at the bottom of the sealing cover, and the peripheral side wall of the boss is threadedly connected to the inner side wall of the inner rod.

[0010] Furthermore, a limiting groove is horizontally provided in the middle of the inner bottom wall of the inner rod, and the lower end of the connecting rod is slidably connected in the limiting groove.

[0011] The advantages of the utility model are: the utility model provides a load reduction device for steel box girder hoisting construction, which plays a role in shock absorption and buffering, and reduces the load, thereby solving the problem that when the crane is hoisting the steel box girder, the tires of the crane put too much load on the road surface, which will cause damage to the road surface.

[0012] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic structural diagram of the utility model.

[0014] Figure 2 It is a schematic diagram of the parts structure of the utility model.

[0015] Figure 3 It is an enlarged view of the structure of point A of the present utility model.

[0016] Figure 4 It is an enlarged view of the structure at B of the utility model.

[0017] Explanation of the accompanying drawings: 1. Top plate; 2. Bottom plate; 3. Airbag; 4. Telescopic rod; 41. Inner rod; 42. Outer rod; 5. Self-locking assembly; 51. Connecting rod; 52. Spring; 53. First through hole; 54. Connecting block; 55. Button; 56. Second through hole; 57. Block; 6. Sealing cover; 7. Boss; 8. Limiting groove. DETAILED DESCRIPTION

[0018] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose, the specific implementation methods, structural features and effects of the present invention are described in detail below with reference to the accompanying drawings and embodiments.

[0019] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "aligned", "overlap", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of such features; and in the description of this utility model, unless otherwise specified, "plurality" means two or more.

[0022] Example 1

[0023] This embodiment provides Figures 1 to 4 The load reduction device shown in the figure for steel box girder hoisting construction includes a top plate 1 and a bottom plate 2, which are horizontally arranged one above the other, wherein the top plate 1 and the bottom plate 2 are made of 20 mm steel plates, and an airbag 3 is provided between the top plates 1 and the top plates 1, and a plurality of telescopic rods 4 supported by the auxiliary airbags 3 are vertically provided on the surrounding side of the airbags 3. The plurality of telescopic rods 4 are evenly arranged along the length and width directions of the top plate 1 with the airbags 3 as the center, and the telescopic rods 4 include an inner rod 41 and an outer rod 42, both of which are hollow and open upward, and the inner rod 41 slides vertically in the outer rod 42, and the upper end of the inner rod 41 is fixed to the lower surface of the top plate 1, and the lower end of the outer rod 42 is fixed to the upper surface of the bottom plate 2.

[0024] When in use, the load reduction device consisting of the top plate 1, the bottom plate 2 and the airbag 3 is first laid on both sides of the road, and two 700mm wide tire driving areas are reserved in the middle of the road. Then, an air pump is used to supply air from the air inlet of the airbag 3 to expand the airbag 3. When the tire of the crane is located on the top plate 1, the airbag 3 can play a shock-absorbing and buffering role, thereby reducing the tire load of the crane. In addition, the concentrated load on the tire can be further reduced by the provided telescopic rod 4.

[0025] Furthermore, the telescopic rod 4 is provided with a self-locking assembly 5, which includes a vertical connecting rod 51. The connecting rod 51 is located on the left side of the inner rod 41. A spring 52 is horizontally provided on the right side of the upper end of the connecting rod 51. The left end of the spring 52 is fixedly connected to the connecting rod 51, and the right end of the spring 52 is fixedly connected to the inner side wall of the inner rod 41. A first through hole 53 is horizontally opened on the left side wall of the upper end of the inner rod 41. A connecting block 54 is horizontally provided in the first through hole 53. The right end of the connecting block 54 is fixedly connected to the left side wall of the upper end of the connecting rod 51. A button 55 is fixedly connected to the left end of the connecting block 54. The diameter of the button 55 is smaller than the aperture of the first through hole 53.

[0026] A second through hole 56 is horizontally opened on the left side wall of the lower end of the inner rod 41, and a clamping block 57 is provided in the second through hole 56. The right side of the clamping block 57 is fixedly connected to the left side wall of the lower end of the connecting rod 51. The vertical cross-section of the clamping block 57 is a right-angled trapezoid. The inclined surface of the clamping block 57 is located on the left side, and the longest side of the clamping block 57 is located on the lower side. The length of the longest side of the clamping block 57 is greater than the sum of the wall thickness of the inner rod 41 and the wall thickness of the outer rod 42.

[0027] When the airbag 3 is supplied with air by the air pump, the inner rod 41 of the telescopic rod 4 rises together with the expansion of the airbag 3, and after the airbag 3 is completely inflated, the inner rod 41 rises to the highest point. At the same time, when the button 55 and the block 57 are completely outside the outer rod 42, the spring 52 arranged inside the inner rod 41 recovers to its original length when not subjected to force in the horizontal direction, and the elastic force of the spring 52 drives the connecting rod 51 to move horizontally to the left. The upper end of the connecting rod 51 drives the button 55 to pass through the first through hole 53 through the connecting block 54, and the lower end of the connecting rod 51 also drives the block 57 to pass through the second through hole 56, so that the block 57 is partially located on the outside and abuts against the upper end opening of the outer rod 42 to achieve a self-locking effect, thereby helping to assist in supporting the airbag 3, thereby further reducing the concentrated load on the tire.

[0028] Furthermore, a sealing cover 6 is horizontally provided at the opening at the upper end of the inner rod 41. The upper surface of the sealing cover 6 is fixedly connected to the lower surface of the top plate 1. A downwardly protruding boss 7 is provided at the bottom of the sealing cover 6. The side walls of the boss 7 are threadedly connected to the inner wall of the inner rod 41.

[0029] By cooperating with the sealing cover 6 and the boss 7, the inner rod 41 can be sealed, and after the telescopic rod 4 is fully extended and self-locked, the bottom of the boss 7 abuts against the upper end of the connecting rod 51 to add a support point, which can play a role in assisting the limiting support of the connecting rod 51.

[0030] Furthermore, a limiting groove 8 is horizontally opened in the middle of the inner bottom wall of the inner rod 41 , and the lower end of the connecting rod 51 is slidably connected in the limiting groove 8 .

[0031] The limiting groove 8 can play a role in limiting the movement of the connecting rod 51 when it moves, thereby ensuring that the connecting rod 51 maintains a straight and horizontal movement when it moves.

[0032] In summary, the utility model provides a load reduction device for steel box girder hoisting construction. The load reduction device is set to play a role in shock absorption and load reduction, thereby solving the problem that when the crane is hoisting the steel box girder, the load on the road surface caused by the tires is too heavy, which will cause damage to the road surface.

[0033] The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A load reduction device for steel box girder hoisting construction, characterized by: The invention comprises a top plate (1) and a bottom plate (2), wherein the top plate (1) and the bottom plate (2) are arranged horizontally one above the other, an air bag (3) is provided between the top plates (1), and a plurality of telescopic rods (4) are vertically provided around the air bag (3) to assist in supporting the air bag (3).

2. A load reduction device for steel box girder hoisting construction according to claim 1, characterized in that: The plurality of telescopic rods (4) are evenly arranged along the length direction and the width direction of the top plate (1) with the air bag (3) as the center.

3. A load reduction device for steel box girder hoisting construction according to claim 2, characterized in that: The telescopic rod (4) comprises an inner rod (41) and an outer rod (42); the inner rod (41) and the outer rod (42) are both hollow and open upward; the inner rod (41) is located inside the outer rod (42) and slides vertically; the upper end of the inner rod (41) is fixed to the lower surface of the top plate (1); and the lower end of the outer rod (42) is fixed to the upper surface of the bottom plate (2).

4. A load reduction device for steel box girder hoisting construction according to claim 3, characterized in that: The telescopic rod (4) is provided with a self-locking assembly (5), and the self-locking assembly (5) includes a vertical connecting rod (51), the connecting rod (51) is located on the left side of the interior of the inner rod (41), a spring (52) is horizontally provided on the right side of the upper end of the connecting rod (51), the left end of the spring (52) is fixedly connected to the connecting rod (51), and the right end of the spring (52) is fixedly connected to the inner side wall of the inner rod (41), a first through hole (53) is horizontally opened on the left side wall of the upper end of the inner rod (41), a connecting block (54) is horizontally provided in the first through hole (53), the right end of the connecting block (54) is fixedly connected to the left side wall of the upper end of the connecting rod (51), and a button (55) is fixedly connected to the left end of the connecting block (54); A second through hole (56) is horizontally opened on the left side wall of the lower end of the inner rod (41), and a clamping block (57) is provided in the second through hole (56). The right side of the clamping block (57) is fixedly connected to the left side wall of the lower end of the connecting rod (51).

5. A load reduction device for steel box girder hoisting construction according to claim 4, characterized in that: The vertical cross-section of the clamping block (57) is a right-angled trapezoid, the inclined surface of the clamping block (57) is located on the left side, the longest side of the clamping block (57) is located on the lower side, and the length of the longest side of the clamping block (57) is greater than the sum of the wall thickness of the inner rod (41) and the wall thickness of the outer rod (42).

6. A load reduction device for steel box girder hoisting construction according to claim 4, characterized in that: A sealing cover (6) is horizontally provided at the opening of the upper end of the inner rod (41), the upper surface of the sealing cover (6) is fixedly connected to the lower surface of the top plate (1), and a downwardly protruding boss (7) is provided at the bottom of the sealing cover (6), and the peripheral side wall of the boss (7) is threadedly connected to the inner side wall of the inner rod (41).

7. A load reduction device for steel box girder hoisting construction according to claim 4, characterized in that: A limiting groove (8) is horizontally provided in the middle of the inner bottom wall of the inner rod (41), and the lower end of the connecting rod (51) is located in the limiting groove (8) for sliding connection.

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