C-shaped lifting appliance for bridge demolition

Abstract

The utility model discloses a C type sling for bridge demolition, which relates to the field of bridge construction and comprises a sling main body with an opening on one side and a pulley connecting lug fixedly connected to the top of the sling main body, a limiting component is movably mounted at the bottom of the inner side of the sling main body, and a positioning component is movably mounted on one side of the sling main body far away from the opening. The limiting assembly comprises a fixing frame. The bottom of the beam body is in contact with the top face of the wear-resisting plate, the limiting protruding block is pressed downwards along with the weight of the beam body after the limiting protruding block is in contact with the beam body, the movable plate moves downwards to extrude the supporting spring so that the supporting spring can be compressed, and therefore the limiting protruding block can be contained in the groove to be flush with the fixing frame. The limiting convex blocks which are not pressed down by the beam body are located on the two sides of the beam body to limit the beam body, short-distance limiting on the beam bodies of different sizes can be guaranteed through the limiting convex blocks which are arranged at equal intervals, the situation that the beam body is located on the inner side of the lifting tool body and generates large-amplitude sliding is avoided, and safety is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of bridge construction, in particular to a C-shaped lifting device for bridge demolition. Background Art

[0002] In recent years, with the rapid development of the country's transportation infrastructure, some of the expressways built in the early days can no longer fully meet the current traffic demand. The number of existing expressway reconstruction and expansion projects has increased. The bearing capacity of the original expressway bridges crossing the existing railway lines has declined and can no longer meet the increasing traffic load. The work of strengthening and renovating those bridges with insufficient bearing capacity is imminent. During the demolition operation, the beams need to be dismantled using hoists.

[0003] Existing C-shaped spreaders used for bridge demolition are made entirely of welded steel and are unable to effectively limit the position of the beam being hoisted. When the center of gravity of the beam shifts during lifting, the coiled steel can easily slip out of the spreader's opening, causing serious accidents. Although some C-shaped spreaders have limiters at the opening, they are only set at the outermost position, so the beam may still move, resulting in poor stability. Utility Model Content

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A C-type sling for bridge demolition, comprising a sling main body with an opening on one side and a pulley connecting ear fixedly connected to the top of the sling main body, a limiting component movably installed at the bottom inside the inner side of the sling main body, a positioning component movably installed on the side of the sling main body away from the opening, the limiting component comprising a fixing frame, the top of the fixing frame is provided with grooves at equal intervals, a movable plate and a support spring are movably connected inside the grooves, the support spring is arranged below the movable plate, the top of the movable plate is fixedly connected to a limiting protrusion, the size of the limiting protrusion is smaller than the movable plate, and the limiting protrusion is located at the top of the fixing frame.

[0006] A further improvement of the technical solution of the present utility model is that: the positioning assembly includes a sliding rod, the inner and outer sides of the sliding rod are respectively fixedly connected with a positioning plate and a limit block, the outer side of the sliding rod is equidistantly provided with adjustment holes, the outer side of the sling body is fixedly connected with an ear plate, the interior of the ear plate is movably installed with two fixing bolts penetrating the adjustment hole, and the inner side of the positioning plate is fixedly installed with a soft pad.

[0007] A further improvement of the technical solution of the present utility model is that a clamping slot is provided at the bottom of the fixing frame, and the fixing frame is movably clamped to the outside of the sling body through the clamping slot.

[0008] A further improvement of the technical solution of the present invention is that a fixing hole is provided on the outer side of the sling body, and a fixing bolt located in the fixing hole is movably installed on the outer side of the fixing frame.

[0009] A further improvement of the technical solution of the present invention is that a wear-resistant plate is fixedly installed on the top of the fixing frame, and an opening corresponding to the limiting protrusion is opened inside the wear-resistant plate.

[0010] A further improvement of the technical solution of the present utility model is that the limiting protrusion and the wear-resistant plate are both made of NM500 wear-resistant steel.

[0011] A further improvement of the technical solution of the present utility model is that a sliding hole is opened on the side of the sling body, the sliding rod is movably connected to the inside of the sliding hole, and a distance reference scale is provided on the outside of the sliding rod.

[0012] A further improvement of the technical solution of the present utility model is that a counterweight box is fixedly installed above one side of the opening of the sling body.

[0013] Due to the adoption of the above technical solution, the present invention has achieved the following technical advancements compared to the prior art:

[0014] 1. The utility model provides a C-type sling for bridge demolition, which makes the bottom of the beam contact the top surface of the wear-resistant plate, and the limiting protrusion contacts the beam and presses the limiting protrusion downward with its weight, and the movable plate moves downward to squeeze the supporting spring to compress it so that the limiting protrusion is retracted into the inside of the groove and flush with the fixed frame. The limiting protrusions that are not pressed down by the beam are located on both sides of the beam to limit it. The limiting protrusions arranged at equal intervals can ensure close positioning of beams of different sizes, avoid the beam from sliding significantly inside the sling body, and ensure safety.

[0015] 2. The utility model provides a C-type hoist for bridge demolition. By removing the fixing bolt 2, the fixing bolt 2 can be disengaged from the adjustment hole, and the slide rod can be slid along the slide hole to adjust the position of the positioning plate, thereby facilitating the positioning of the lifting position of beams of different sizes during use, making it convenient for construction workers to conveniently determine the lifting position of the beam, and ensuring safe and stable use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a C-type spreader for bridge demolition according to the present invention;

[0017] Figure 2 This is a schematic diagram of the installation position of the limit assembly of the utility model;

[0018] Figure 3 This is a schematic cross-sectional view of the position limiting assembly of the present invention;

[0019] Figure 4 This is a structural diagram of the positioning assembly of the present utility model;

[0020] Figure 5 It is a structural schematic diagram of the utility model in the hoisting state.

[0021] In the figure: 1. Lifting device body; 11. Fixing hole; 12. Counterweight box; 13. Sliding hole; 2. Pulley connecting ear; 3. Limiting assembly; 31. Fixing frame; 32. Slot; 33. Groove; 34. Movable plate; 35. Support spring; 36. Limiting protrusion; 37. Wear-resistant plate; 38. Fixing bolt 1; 4. Positioning assembly; 41. Sliding rod; 42. Positioning plate; 43. Limiting block; 44. Adjusting hole; 45. Ear plate; 46. Fixing bolt 2; 47. Cushion. DETAILED DESCRIPTION

[0022] The utility model is described in further detail below:

[0023] like Figures 1 to 5 As shown, the utility model provides a C-type sling for bridge demolition, comprising a sling main body 1 with an opening on one side and a pulley connecting ear 2 fixedly connected to the top of the sling main body 1, a limiting component 3 is movably installed at the bottom inside the inner side of the sling main body 1, and a positioning component 4 is movably installed on the side of the sling main body 1 away from the opening, the limiting component 3 includes a fixing frame 31, and grooves 33 are equidistantly provided on the top of the fixing frame 31, and a movable plate 34 and a support spring 35 are movably connected inside the groove 33, and the support spring 35 is arranged below the movable plate 34, and the top of the movable plate 34 is fixedly connected to a limiting protrusion 36, the size of the limiting protrusion 36 is smaller than the movable plate 34, and the limiting protrusion 36 is located at the top of the fixing frame 31.

[0024] By making the bottom of the beam body contact the top surface of the wear-resistant plate 37, the limiting protrusion 36 contacts the beam body and presses the limiting protrusion 36 downward with its weight, so that the limiting protrusion 36 drives the movable plate 34 to move downward along the groove 33. The movable plate 34 moves downward to squeeze the support spring 35 to compress it so that the limiting protrusion 36 is retracted into the interior of the groove 33 and is flush with the fixed frame 31. Since the limiting protrusions 36 are arranged at equal intervals, the limiting protrusions 36 that are not pressed down by the beam body are located on both sides of the beam body to limit it. The equidistant limiting protrusions 36 can ensure close-range limiting of beams of different sizes, avoid large sliding of the beam body inside the sling body 1, and ensure safety.

[0025] like Figure 4As shown, the positioning assembly 4 includes a slide rod 41, and the inner and outer sides of the slide rod 41 are fixedly connected with a positioning plate 42 and a limit block 43 respectively. Adjustment holes 44 are equidistantly provided on the outer side of the slide rod 41, and an ear plate 45 is fixedly connected to the outer side of the sling body 1. A fixing bolt 46 penetrating the adjustment hole 44 is movably installed inside the ear plate 45, and a soft pad 47 is fixedly installed on the inner side of the positioning plate 42.

[0026] By removing the fixing bolt 2 46 , the fixing bolt 2 46 can be disengaged from the adjustment hole 44 , and the slide rod 41 can be slid along the slide hole 13 to adjust the position of the positioning plate 42 , thereby facilitating the positioning of the hoisting position of beams of different sizes during use, and facilitating the construction personnel to conveniently determine the hoisting position of the beam, thereby ensuring safe and stable use.

[0027] like Figure 2 and Figure 3 As shown, a slot 32 is provided at the bottom of the fixing frame 31 , and the fixing frame 31 is movably connected to the outside of the sling body 1 through the slot 32 .

[0028] A fixing hole 11 is formed on the outside of the sling body 1 , and a fixing bolt 38 located in the fixing hole 11 is movably mounted on the outside of the fixing frame 31 .

[0029] The fixing frame 31 can be fixed on the outside of the sling body 1 by the setting of the card slot 32, and the fixing frame 31 can be fixed by using a fixing bolt 38 threadedly installed in the fixing hole 11, which is convenient for disassembly and assembly, and thus facilitates maintenance work.

[0030] like Figure 3 As shown, a wear-resistant plate 37 is fixedly mounted on the top of the fixing frame 31 , and an opening corresponding to the limiting protrusion 36 is formed inside the wear-resistant plate 37 .

[0031] The limiting protrusion 36 and the wear-resistant plate 37 are both made of NM500 wear-resistant steel.

[0032] The beam body is in contact with the wear-resistant plate 37 and the limiting protrusion 36, both of which are made of NM500 wear-resistant steel, which has high wear resistance and a Brinell hardness value of 500HBW, extending the service life.

[0033] like Figure 4 As shown, a sliding hole 13 is opened on the side of the sling body 1, and a sliding rod 41 is movably engaged with the inside of the sliding hole 13, and a distance reference scale is set on the outside of the sliding rod 41.

[0034] By the slide rod 41 sliding flexibly along the slide hole 13 and cooperating with the reference scale setting on the outside of the slide rod 41, it is convenient to adjust according to beams of different sizes and to facilitate the hanging and positioning of the beams.

[0035] like Figure 2As shown, a counterweight box 12 is fixedly installed above one side of the opening of the sling body 1.

[0036] The counterweight box 12 can be used to flexibly adjust the counterweight to ensure the stability of the sling body 1 during use.

[0037] The following is a detailed description of the working principle of the C-type spreader used for bridge demolition.

[0038] like Figures 1 to 5 As shown, when in use, two sling bodies 1 are set up to respectively insert the beam body from the two ends of the beam body from the opening side of the sling body 1, and the beam body is located in the sling body 1 and contacts the soft pad 47 on the inner side of the positioning plate 42 for positioning to ensure the accuracy of the lifting position. Subsequently, the crane is used to lift the beam body using the pulley connected to the pulley connecting ear 2. By making the bottom of the beam body contact the top surface of the wear-resistant plate 37, the limiting protrusion 36 contacts the beam body and presses the limiting protrusion 36 downward with its weight, so that the limiting protrusion 36 drives the movable plate 34 to move downward along the groove 33. The movable plate 34 moves downward to squeeze the support spring 35 to compress it, so that the limiting protrusion 36 is retracted into the groove. The interior of 33 is flush with the fixing frame 31. Since the limiting protrusions 36 are arranged at equal distances, the limiting protrusions 36 that are not pressed down by the beam body are located on both sides of the beam body to limit it, preventing the beam body from sliding out and ensuring safety. By removing the fixing bolt 2 46, the fixing bolt 2 46 can be disengaged from the adjustment hole 44, and the slide rod 41 can be slid along the slide hole 13 to adjust the position of the positioning plate 42, so as to facilitate the positioning of the lifting position of beams of different sizes when in use, ensuring safe and stable use. By removing the fixing bolt 1 38 located in the fixing hole 11, the fixing frame 31 can be removed from the sling body 1 using the card slot 32 for easy maintenance.

[0039] The above generally describes the present invention in detail. However, it is obvious to those skilled in the art that modifications or improvements may be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A C-shaped sling for bridge demolition, comprising a sling body (1) with an opening on one side and a pulley connecting ear (2) fixedly connected to the top of the sling body (1), characterized in that: A limiting component (3) is movably mounted on the bottom of the inner side of the sling body (1), and a positioning component (4) is movably mounted on the side of the sling body (1) away from the opening; The limiting assembly (3) includes a fixing frame (31), the top of the fixing frame (31) is provided with grooves (33) at equal intervals, the interior of the groove (33) is movably connected with a movable plate (34) and a support spring (35), the support spring (35) is arranged below the movable plate (34), the top of the movable plate (34) is fixedly connected with a limiting protrusion (36), the size of the limiting protrusion (36) is smaller than that of the movable plate (34), and the limiting protrusion (36) is located at the top of the fixing frame (31).

2. The C-type spreader for bridge demolition according to claim 1, characterized in that: The positioning assembly (4) includes a slide rod (41), and the inner and outer sides of the slide rod (41) are fixedly connected to a positioning plate (42) and a limit block (43), respectively. The outer side of the slide rod (41) is provided with adjustment holes (44) at equal intervals. The outer side of the sling body (1) is fixedly connected to an ear plate (45), and the interior of the ear plate (45) is movably installed with two fixing bolts (46) that penetrate the adjustment hole (44). The inner side of the positioning plate (42) is fixedly installed with a soft pad (47).

3. The C-type spreader for bridge demolition according to claim 1, characterized in that: A clamping slot (32) is provided at the bottom of the fixing frame (31), and the fixing frame (31) is movably clamped to the outside of the sling body (1) through the clamping slot (32).

4. The C-shaped spreader for bridge demolition according to claim 3, characterized in that: A fixing hole (11) is provided on the outside of the sling body (1), and a fixing bolt (38) located in the fixing hole (11) is movably installed on the outside of the fixing frame (31).

5. The C-type spreader for bridge demolition according to claim 1, characterized in that: A wear-resistant plate (37) is fixedly mounted on the top of the fixing frame (31), and an opening corresponding to the limiting protrusion (36) is provided inside the wear-resistant plate (37).

6. The C-shaped spreader for bridge demolition according to claim 5, characterized in that: The limiting protrusion (36) and the wear-resistant plate (37) are both made of NM500 wear-resistant steel.

7. The C-type spreader for bridge demolition according to claim 2, characterized in that: A sliding hole (13) is provided on the side of the sling body (1), the sliding rod (41) is movably engaged with the inside of the sliding hole (13), and a distance reference scale is provided on the outside of the sliding rod (41).

8. The C-shaped spreader for bridge demolition according to claim 7, characterized in that: A counterweight box (12) is fixedly installed above one side of the opening of the sling body (1).

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