Large-scale crane suspension arm rest device

Abstract

The utility model discloses a large-scale crane suspension arm rest device which comprises a rest platform and a suspension arm support. Limiting blocks are fixed to the pillow platform, the limiting blocks are in an L shape and symmetrically distributed on the pillow platform, and sleepers are installed on the opposite inner faces of the limiting blocks. The inhaul cable mechanism is mounted on the pillow placing platform and is used for pressing and limiting the crane boom to prevent the crane boom from being lifted upwards. The crane boom is subjected to side edge limiting through the two oppositely-distributed sleepers, the crane boom is subjected to downward pressing limiting through the inhaul cable of the inhaul cable mechanism to avoid upward lifting, the stability of the supporting state is improved, and the problem that in the prior art, the crane boom is supported, downward pressing limiting cannot be conducted, and upward lifting cannot be avoided is solved.

Description

Technical Field

[0001] The utility model relates to a boom rest device for a large crane, belonging to the technical field of offshore hoisting construction equipment. Background Art

[0002] After the lifting platform is in place at sea, during the process of self-navigation or towing, it usually encounters strong wind weather and even needs to avoid typhoons. The main boom of the large crane arranged on the lifting platform is usually in a shaking state and in an unsafe state. Therefore, it is necessary to support and stabilize the boom.

[0003] For the existing boom support and stabilization technology, see Chinese Patent Publication No. CN210393509U. The disclosed enhanced frame has a sleeper installed in the boom rest arm groove. Although the sleeper can support the side of the boom, the upper side of the boom is in an open state, and there is a problem that the upper side of the boom cannot be pressed down for limit to avoid upward lifting. Content of the Utility Model

[0004] To solve the above technical problems, the utility model provides a boom rest device for a large crane.

[0005] The utility model is achieved through the following technical solutions.

[0006] A boom rest device for a large crane provided by the utility model includes:

[0007] A rest platform;

[0008] Limit blocks are fixed on the rest platform. The limit blocks are L-shaped and symmetrically distributed on the rest platform. Sleepers are installed on the relative inner surfaces of the limit blocks;

[0009] It further includes a cable mechanism installed on the rest platform to press down and limit the crane boom to prevent it from lifting upward.

[0010] The cable mechanism includes a fixed block fixed on the rest platform. The fixed block is hinged with a movable block. The movable block can rotate on the fixed block. The fixed block and the movable block are both symmetrically distributed on two sides of the rest platform. Cables for pressing down and limiting the crane boom to prevent it from lifting upward are fixedly connected to the ends of the two movable blocks.

[0011] The sleeper is removably fixed on the limit block by bolts. The bolts connecting the sleeper penetrate through the limit block to the rest platform and are then screwed and fixed by nuts.

[0012] Trapezoidal holes for weight reduction and convenient handling are provided on the limit blocks.

[0013] It further includes a connection platform fixed to the bottom of the headrest platform. The connection platform includes diagonal braces in an inclined state. There are multiple diagonal braces distributed longitudinally at intervals. The diagonal braces are fixedly connected longitudinally by longitudinal bars. Vertical columns are fixed to the diagonal braces. There are multiple vertical columns, and each vertical column is located at the intersection of the longitudinal bar and the diagonal brace. A transverse bar is fixed to the top of the vertical column, and the left end of the transverse bar intersects and is fixedly connected to the diagonal brace.

[0014] A collision prevention block is fixed at the intersection of the transverse bar and the diagonal brace.

[0015] The transverse bar is fixedly connected to the bottom of the headrest platform.

[0016] The beneficial effect of the present utility model is that the crane boom is laterally limited by two oppositely distributed sleepers, and the crane boom is limited from pressing down by the cable of the cable mechanism to prevent it from lifting upward, improving the stability of the support state and solving the problem in the prior art that the crane boom can be supported but cannot be limited from pressing down to prevent lifting. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the distribution schematic diagram of the present utility model;

[0018] Figure 2 is the distribution schematic diagram of the cable mechanism of the present utility model;

[0019] In the figure: 1 - headrest platform; 21 - limit block; 22 - sleeper; 26 - trapezoidal hole; 3 - crane boom; 4 - connection platform; 41 - transverse bar; 42 - diagonal brace; 43 - vertical column; 44 - longitudinal bar; 45 - collision prevention block; 5 - cable mechanism; 51 - cable; 52 - movable block; 53 - fixed block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The technical solution of the present utility model will be further described below, but the scope of protection claimed is not limited thereto.

[0021] As Figures 1 to 2 shown.

[0022] A large crane boom headrest device of the present application includes:

[0023] The connecting platform 4 with its right end for fixedly connecting to an offshore operation platform, and an anti-collision block 45 is fixedly installed at the left end of the connecting platform 4. The connecting platform 4 includes inclined braces 42 in an inclined state, and there are multiple inclined braces 42 distributed longitudinally at intervals. The inclined braces 42 are fixedly connected longitudinally by longitudinal rods 44. The inclined braces 42 are welded with vertical columns 43 erected thereon, and there are multiple columns 43. Each column 43 is located at the intersection of the longitudinal rod 44 and the inclined brace 42. A transverse rod 41 is fixedly installed at the top of the column 43. The left end of the transverse rod 41 is fixedly connected to the intersection of the inclined brace 42, and the anti-collision block 45 is fixedly installed at the intersection of the transverse rod 41 and the inclined brace 42.

[0024] A sleeper platform 1 is fixedly installed on the transverse rod 41 of the connecting platform 4. A limit block 21 is fixedly installed on the sleeper platform 1. The limit block 21 is L-shaped and symmetrically distributed on the sleeper platform 1. A sleeper 22 is installed on the relative inner surface of the limit block 21. The sleeper 22 is removably fixed to the limit block 21 by bolts. The bolts connecting the sleeper 22 penetrate from the limit block 21 to the sleeper platform 1 and are then screwed and fixed by nuts. A trapezoidal hole 26 for weight reduction and convenient handling is provided on the limit block 21.

[0025] It further includes a cable mechanism 5 installed on the sleeper platform 1 to limit the downward movement of the crane boom 3 and prevent it from lifting upward. The cable mechanism 5 includes a fixed block 53 fixedly installed on the sleeper platform 1. The fixed block 53 is hinged with a movable block 52 through a pin shaft. The movable block 52 can rotate on the fixed block 53. The fixed block 53 and the movable block 52 are both symmetrically distributed on two sides of the sleeper platform 1. A cable 51 for limiting the downward movement of the crane boom 3 and preventing it from lifting upward is bundled and fixedly connected to the ends of the two movable blocks 52. The cable 51 is composed of a non-metallic rope such as an elastic bandage or a metallic rope such as a cable. When the cable 51 limits the downward movement of the crane boom 3, the cable 51 swings through the movable block 52 that can rotate on the fixed block 53 for displacement compensation, avoiding friction and damage of the cable 51 during connection.

[0026] The crane boom 3 is placed on the sleepers 22 of the limit block 21. The crane boom 3 is laterally limited by two oppositely distributed sleepers 22. The crane boom 3 is limited from lifting upward by the cable 51 of the cable mechanism 5, improving the stability of the support state and solving the problem in the prior art that the crane boom can be supported but cannot be limited from lifting upward by downward pressure.

Claims

1. A large crane boom bolster device, characterized in that: include: Pillow platform (1); A limit block (21) is fixed on the pillow platform (1), the limit block (21) is L-shaped and symmetrically distributed on the pillow platform (1), and a sleeper (22) is installed on the inner surface of the limit block (21); It also includes a cable mechanism (5) installed on the pillow platform (1) to limit the downward pressure on the crane arm (3) to prevent it from being lifted upward.

2. The large crane boom bolster device according to claim 1, characterized in that: The cable mechanism (5) comprises a fixed block (53) fixed on the pillow platform (1); the fixed block (53) is hinged with a movable block (52); the movable block (52) can rotate on the fixed block (53); the movable block (52) and the fixed block (53) are both symmetrically distributed on the pillow platform (1); and the ends of the two movable blocks (52) are fixedly connected with cables (51) for pressing down and limiting the crane arm (3) to prevent it from being lifted upward.

3. The large crane boom bolster device according to claim 2, characterized in that: The sleeper (22) is removably fixed to the limit block (21) by means of bolts, and the bolts connecting the sleeper (22) pass through the limit block (21) to the sleeper platform (1) and are then screwed and fixed by nuts.

4. The large crane boom bolster device according to claim 3, characterized in that: The limiting block (21) is provided with a trapezoidal hole (26) for reducing weight and facilitating lifting.

5. The large crane boom bolster device according to claim 1, characterized in that: It also includes a connecting platform (4) fixed at the bottom of the pillow platform (1).

6. The large crane boom bolster device according to claim 5, characterized in that: The connecting platform (4) comprises a diagonal brace (42) in an inclined state, wherein the diagonal brace (42) is a plurality of diagonal braces (42) distributed at intervals in the longitudinal direction, and the diagonal braces (42) are fixedly connected in the longitudinal direction by longitudinal rods (44). The diagonal brace (42) is fixed with an upright column (43), wherein there are a plurality of upright columns (43), and each upright column (43) is located at the intersection of the longitudinal rod (44) and the diagonal brace (42). A transverse rod (41) is fixed on the top of the upright column (43), and the left end of the transverse rod (41) is fixedly connected to the diagonal brace (42) at the intersection.

7. The large crane boom bolster device according to claim 6, characterized in that: An anti-collision block (45) is fixed at the intersection of the transverse rod (41) and the diagonal brace (42).

8. The large crane boom bolster device according to claim 6, characterized in that: The transverse rod (41) is fixedly connected to the bottom of the pillow platform (1).

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