Bridge block hoisting device

Abstract

The utility model discloses a bridge block hoisting device which comprises a lifting hook seat and a lifting hook body, the lifting hook seat is a component with a top surface at the top and an open rectangular groove at the bottom, a swing plate for fixing the lifting hook body is arranged in the rectangular groove, and geometric centers of two side surfaces of the swing plate are hinged with the inner wall of the rectangular groove through rotating shafts. Movable openings are formed in the two ends of the top face of the lifting hook base, the top ends of the movable frames penetrate through the movable openings and are located above the top face of the lifting hook base, hydraulic cylinders with downward output shafts are arranged at the two ends of the top face of the lifting hook base respectively, and each hydraulic cylinder is located on the outer side of the corresponding movable opening; an output shaft of the hydraulic cylinder penetrates through the top face of the lifting hook base and abuts against the top face of the bottom end of the movable frame. The utility model solves the problems that the balance is difficult to control and the swing and rotation are easily caused by center offset when the bridge block is hoisted by the current crane through a lifting hook, and can be widely applied to the field of bridge demolition construction.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge demolition construction, in particular to a bridge block hoisting device. Background Art

[0002] As urban traffic volume increases, existing bridges may not be able to meet traffic demand. In this case, it is necessary to expand the bridge scale or change the structural layout to improve traffic capacity, and part or all of the original bridge structure may need to be demolished. In the process of bridge demolition, lifting bridge blocks is a very critical link, especially when adopting the segmented demolition method or the overall demolition method, it is necessary to lift and transport the cut or disassembled bridge components.

[0003] At present, the lifting of bridge blocks is carried out by cranes. Most of the existing cranes pass the lifting chains through the pre-designed lifting holes on the bridge blocks before operation and then connect them with the hooks. Since it is difficult to control the balance of the bridge blocks by connecting the lifting points through the hooks, the bridge blocks cannot maintain a horizontal state or rise in a predetermined balanced posture when lifted. It is easy to cause swinging and rotation due to center offset, which affects the stability during lifting. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies of the above-mentioned background technology and to provide a bridge block lifting device, so as to solve the problem that it is difficult to control the balance when the crane lifts the bridge block through the hook, the bridge block cannot be well kept horizontal or rise in a predetermined balanced posture when lifted, and is prone to swing and rotation due to center offset.

[0005] The utility model provides a bridge block lifting device, including a hook seat connected to a lifting wheel through a bracket at the top, a hook body being provided at the bottom of the hook seat, the hook seat being a component with a top surface at the top and an open rectangular groove at the bottom, a swing plate for fixing the hook body being provided in the rectangular groove, the geometric center of the two side surfaces of the swing plate being hingedly connected to the inner wall of the rectangular groove through a rotating shaft, movable frames with an outward-facing opening and a sideways "U"-shaped structure being provided at both ends of the swing plate, movable openings being provided at both ends of the top surface of the hook seat, the horizontal dimension of the movable openings being larger than the horizontal dimension of the vertical portion of the movable frame, the top end of the movable frame passing through the movable openings and being located above the top surface of the hook seat, hydraulic cylinders with output shafts facing downwards being provided at both ends of the top surface of the hook seat, each of the hydraulic cylinders being located outside the corresponding movable opening, and the output shaft of the hydraulic cylinder passing through the top surface of the hook seat and abutting against the top surface of the bottom end of the movable frame.

[0006] In the above technical solution, a push block is provided at the bottom of the hydraulic cylinder output shaft, and a recessed groove is provided on the top surface of the bottom end of the movable frame. The push block and the recessed groove are matched in size and shape.

[0007] In the above technical solution, the push block has a right-angled trapezoidal cross section and a bottom surface arranged as an inclined surface, and the cross section of the recessed groove also has a right-angled trapezoidal structure matching the size of the push block.

[0008] In the above technical solution, the bottom surface of the inclined surface of the push block is provided with a sponge pad that matches the bottom surface of the recessed groove.

[0009] In the above technical solution, an elastic rope is provided between the top of the inner side of the vertical part of the movable frame and the top surface of the hook seat, and the two ends of the elastic rope are respectively fixed to the top of the inner side of the vertical part of the movable frame and the top surface of the hook seat.

[0010] In the above technical solution, an extension frame is provided between the bottom surface of the top end of the movable frame and the top surface of the hook seat, and the extension frame is composed of two straight rods hingedly connected, wherein one straight rod is hingedly connected to the bottom surface of the top end of the movable frame, and the other straight rod is hingedly connected to the top surface of the hook seat, and the extension frame is located on one side of the hydraulic cylinder.

[0011] In the above technical solution, the hinge points of the two straight rods protrude outwards.

[0012] In the above technical solution, a spring is provided between the two straight rods of the stretching frame.

[0013] The utility model of bridge block hoisting device has the following beneficial effects:

[0014] The bridge block hoisting device can adjust the angle of the hook in time to control the bridge block posture, reduce the swing and rotation of the bridge block in the air, thereby effectively improving the stability during hoisting and ensuring the safety and efficiency of the hoisting operation. The device arranges a swing plate inside the hook seat and fixes the hook body. The movable frames on both sides of the swing plate can move under the drive of the hydraulic cylinder, so that the swing plate can swing left and right in the rectangular groove of the hook to adjust the angle of the hook body, so that the hook body can adaptively control the bridge block posture to make it more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of the bridge block hoisting device of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the bridge block hoisting device of the utility model viewed from above;

[0017] Figure 3 This is a front view of the external structure of the bridge block hoisting device of the utility model;

[0018] Figure 4 The utility model is a structural schematic diagram of the extension frame, the movable frame and the hook seat in the bridge block lifting device. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, but the embodiments should not be construed as limiting the present invention.

[0020] See also Figures 1 to 4The utility model provides a technical solution: a bridge block lifting device, including a hook seat 1, a hook body 2 is provided at the bottom of the hook seat 1, a lifting wheel 12 is fixed to the top of the hook seat 1 through a bracket, a rope is wound around the lifting wheel 12 and connected to the boom of the crane, a rectangular groove 13 recessed inwards is provided at the bottom of the hook seat 1, a swing plate 3 for fixing the hook body 2 is provided in the rectangular groove 13 of the hook seat 1, the middle of the front and rear ends of the swing plate 3 are hingedly connected to the inner wall of the rectangular groove 13 of the hook seat 1 through a rotating shaft, and the top of the hook body 2 is welded and fixed to the middle of the bottom of the swing plate 3, movable frames 4 are provided at both ends of the swing plate 3, movable openings 6 are provided at both ends of the top wall of the rectangular groove 13 of the hook seat 1, and the upper end of the movable frame 4 extends through the movable opening 6 The movable frame 4 protrudes to the outside of the top of the hook seat 1, and the lower end of the movable frame 4 also protrudes to the outside of the bottom end of the hook seat 1, and the two ends of the top of the hook seat 1 are fixed with hydraulic cylinders 5 by bolts. The output shaft of the hydraulic cylinder 5 penetrates into the rectangular groove of the hook seat 1 and is welded and fixed with a push block 7. The hook seat 1 of this structure can be connected with a plurality of groups of lifting chains that penetrate into the lifting holes on the bridge block through the hook body 2 and the lifting operation can be performed using the lifting wheel, and when the hydraulic cylinder 5 is driven, it can drive the push block 7 to move vertically to press the inner side of the lower end part of the movable frame 4. When the movable frame 4 is subjected to force, it can move a certain amplitude at the movable opening 6 to generate linkage with the swing plate 3. After the swing plate 3 is linked, it can swing left and right in the rectangular groove of the hook seat 1 to drive the hook body 2 to convert different angles. The angle of the hook body 2 can be adjusted in time to control the posture of the bridge block, reduce the swing and rotation of the bridge block in the air, avoid the problem that the existing hook body 2 cannot control the balance well when lifting the bridge block through the lifting chain, and is easy to flip or swing due to the offset of the center of gravity, ensure that the bridge block can remain horizontal or rise in a balanced manner according to a predetermined posture when hoisting, thereby effectively improving the stability when hoisting the bridge block, making the hoisting operation safer and more efficient. The movable frame 4 is a vertically distributed "U"-shaped structure as a whole, and the width of the movable opening 6 is greater than the width of the vertical part of the movable frame 4. The movable opening 6 of this structure can ensure the range of left and right movements of the movable frame 4 on the hook seat 1, so that the swing plate 3 can achieve the effect of multi-angle adjustment, and the push block 7 The bottom is an inclined surface structure and a sponge pad is bonded and fixed. The inner wall of the bottom end of the movable frame 4 is provided with a recessed groove 8 that matches the push block 7 structure. The push block 7 of this structure can be embedded in the recessed groove 8 to press the bottom end of the movable frame 4, which can improve the stability of the push block 7 when pushing the movable frame 4, and the sponge pad at the bottom of the push block 7 can maintain a certain expansion and contraction range, so as to be more closely in contact with the inner wall of the recessed groove 8 for pressing. Elastic ropes 9 are connected between the outer side of the top of the movable frame 4 and the top of the hook seat 1. The connection between the elastic rope 9 and the movable frame 4 and the hook seat 1 can be welded and fixed, and each group of elastic ropes 9 is provided with two. The movable frame 4 of this structure will synchronously drive the elastic rope 9 to stretch during the activity on the hook seat 1.In this way, the elastic rope 9 can play a certain degree of elastic limiting role on the movable frame 4, which is conducive to improving the stability of the movable frame 4 after adjustment. An extension frame 10 is connected between the inner wall of the top part of the movable frame 4 and the top of the hook seat 1. The extension frame 10 is formed by two straight rods hinged to each other through a pin shaft. The connection between the extension frame 10, the movable frame 4 and the hook seat 1 is also hinged to each other through a pin shaft, and a spring 11 is connected between the two straight rods of the extension frame 10. The movable frame 4 of this structure will also drive the extension frame 10 to perform corresponding extension activities during the movement on the hook seat 1. When the extension frame 10 moves, it will simultaneously drive the spring 11 to produce corresponding activities, which enables the extension frame 10 and the spring 11 to cooperate with each other to further improve the stability of the movable frame 4 after adjustment.

[0021] Working principle: When using the bridge block lifting device, first connect several lifting chains inserted into the lifting holes on the bridge block with the hook body 2. When the hook seat 1 is lifted on the crane arm through the lifting wheel at the top and the wire rope, the operator can start the corresponding hydraulic cylinder 5. When the hydraulic cylinder 5 is driven, it can drive the push block 7 to move vertically until the push block 7 moves to the inside of the concave groove 8 to press the bottom part of the movable frame 4. When the movable frame 4 is subjected to force, it can move a certain range of movement at the movable opening 6 to generate linkage with the swing plate 3. After the swing plate 3 is linked, it can be moved on the hook seat 1 swings left and right in the rectangular groove of the hook body 2 to drive the hook body 2 to change different angles, and the movable frame 4 will synchronously drive the elastic rope 9 to stretch during the movement of the hook seat 1, and the stretching frame 10 will also perform corresponding stretching activities between the top part of the movable frame 4 and the top of the hook seat 1. When the stretching frame 10 moves, it will also synchronously drive the spring 11 to produce corresponding activities, so as to keep the movable frame 4 stable. In this way, when the hook body 2 changes its angle, it can achieve a certain degree of control over the bridge block posture, improve the stability during the lifting process, and complete a series of tasks.

[0022] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

[0023] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

Claims

1. A bridge block hoisting device, comprising a hook seat (1) connected to a lifting wheel (12) through a bracket at the top, a hook body (2) being provided at the bottom of the hook seat (1), characterized in that: The hook seat (1) is a component having a top surface at the top and an open rectangular groove (13) at the bottom. A swing plate (3) for fixing the hook body (2) is arranged in the rectangular groove (13). The geometric centers of the two side surfaces of the swing plate (3) are hingedly connected to the inner wall of the rectangular groove (13) through a rotating shaft. The two ends of the swing plate (3) are respectively provided with a movable frame (4) with an opening facing outward and a "U"-shaped structure placed sideways. The two ends of the top surface of the hook seat (1) are provided with movable openings (6). The horizontal dimension of the movable opening (6) is larger than the horizontal dimension of the vertical part of the movable frame (4). The top of the movable frame (4) passes through the movable opening (6) and is located above the top surface of the hook seat (1). The two ends of the top surface of the hook seat (1) are respectively provided with hydraulic cylinders (5) with output shafts facing downward. Each hydraulic cylinder (5) is located outside the corresponding movable opening (6). The output shaft of the hydraulic cylinder (5) passes through the top surface of the hook seat (1) and abuts against the top surface of the bottom end of the movable frame (4).

2. The bridge block hoisting device according to claim 1 is characterized in that: A push block (7) is provided at the bottom of the output shaft of the hydraulic cylinder (5), and a recessed groove (8) is provided on the top surface of the bottom end of the movable frame (4). The push block (7) and the recessed groove (8) are matched in size and shape.

3. The bridge block hoisting device according to claim 2 is characterized in that: The push block (7) has a right-angled trapezoidal cross section and a bottom surface arranged in an inclined plane, and the cross section of the recessed groove (8) also has a right-angled trapezoidal structure matching the size of the push block (7).

4. The bridge block hoisting device according to claim 3 is characterized in that: The bottom surface of the inclined surface of the push block (7) is provided with a sponge pad that matches the bottom surface of the recessed groove (8).

5. The bridge block hoisting device according to claim 4 is characterized in that: An elastic rope (9) is provided between the top of the inwardly facing side of the vertical part of the movable frame (4) and the top surface of the hook seat (1), and the two ends of the elastic rope (9) are respectively fixed to the top of the inwardly facing side of the vertical part of the movable frame (4) and the top surface of the hook seat (1).

6. The bridge block hoisting device according to claim 5 is characterized in that: An extension frame (10) is provided between the bottom surface of the top end of the movable frame (4) and the top surface of the hook seat (1). The extension frame (10) is composed of two straight rods that are hingedly connected, wherein one straight rod is hingedly connected to the bottom surface of the top end of the movable frame (4), and the other straight rod is hingedly connected to the top surface of the hook seat (1). The extension frame (10) is located on one side of the hydraulic cylinder (5).

7. The bridge block hoisting device according to claim 6 is characterized in that: The hinge points of the two straight rods protrude outward.

8. The bridge block hoisting device according to claim 7 is characterized in that: A spring (11) is provided between the two straight rods of the stretching frame (10).

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