CN216038246U

CN216038246U - Hook retracting device of pitching luffing crane of offshore platform

Info

Publication number: CN216038246U
Application number: CN202121798762.2U
Authority: CN
Inventors: 况贵鑫; 李强
Original assignee: Ficont Industry Beijing Co Ltd
Current assignee: Ficont Industry Beijing Co Ltd
Priority date: 2021-08-03
Filing date: 2021-08-03
Publication date: 2022-03-15
Anticipated expiration: 2031-08-03

Abstract

The utility model discloses a hook retracting device of a pitching luffing crane of an offshore platform, which comprises a protective cover, a balancing weight, a lifting hook, an upper limit switch, a guide sleeve and a pitching travel switch, wherein the guide sleeve is fixed in the protective cover, an opening is formed in the middle of the protective cover, the upper limit switch is installed on the guide sleeve, the pitching travel switch is installed at the tail end of an arm support, when the arm support of the crane is horizontal to a base, the pitching travel switch is triggered, and when the arm support is vertical to the lifting hook, the lifting hook is embedded into the guide sleeve along with the balancing weight and triggers the upper limit switch to stop running.

Description

Hook retracting device of pitching luffing crane of offshore platform

Technical Field

The utility model relates to the field of offshore platform cranes, in particular to a hook retracting device of an offshore platform pitching luffing crane.

Background

Because the angle between the hook head and the arm support can be changed after the arm support becomes variable in amplitude, in the prior art, the hook is not stable enough and easy to impact and jack, the swing amount after the hook is retracted is large, and the service life of the crane is easy to be shortened under the condition of large wind at sea.

Disclosure of Invention

The utility model aims to provide a hook retracting device suitable for a pitching luffing crane of an offshore platform, and aims to solve the problems that the existing product is not stable enough in arm head hook retracting, is easy to impact and jack, and has large swinging amount after hook retracting.

In order to achieve the purpose, the utility model provides a hook retracting device of a pitching variable-amplitude crane of an offshore platform, which comprises a protective cover, wherein a guide sleeve is fixed in the protective cover, an opening is formed in the middle of the protective cover, a steel wire rope can swing out from the opening of the protective cover after the amplitude of the crane is changed, an upper limit switch is arranged on the guide sleeve, a pitching travel switch is arranged at the tail end of a boom, the pitching travel switch can be triggered only when the boom of the crane is horizontal to a base, and the lifting hook can be stopped when the lifting hook is not triggered and is away from the head of the boom to prevent the lifting hook from being pushed against the top, and only when the boom of the crane is vertical to the lifting hook, the lifting hook can be embedded into the guide sleeve along with a balancing weight and triggers the upper limit switch to stop running so as to finish the hook retracting action.

The lower end of the balancing weight is connected with the hook head into a whole, and the balancing weight runs along with the hook head.

The balancing weight can be embedded into the guide sleeve.

Compared with the prior art, the utility model has the beneficial effects that: the stability of the hook is improved, the swing of the hook head caused by sea wind is reduced, and the service life of the crane is prolonged.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the utility model and are not intended to be limiting of the utility model. Wherein:

FIG. 1 is an isometric view of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

fig. 3 is a general schematic of the present invention.

Reference numerals:

1-a shield; 2-a balancing weight; 3-a hook; 4-wear plate; 5-upper limit switch; 6, a guide sleeve; 7-pitch travel switch.

Detailed Description

As shown in fig. 1, fig. 2 and fig. 3, the embodiment provides a hook retracting device of a pitch luffing crane of an offshore platform, which includes a shield 1, a guide sleeve 6 is fixed in the shield 1, an opening is arranged in the middle of the shield 1, a steel wire rope can swing out from the opening of the shield 1 after the crane luffing, an upper limit switch 5 is installed on the guide sleeve 6, a pitch travel switch 7 is installed at the tail end of an arm support, only when the arm support of the crane is horizontal to a base, the pitch travel switch 7 can be triggered, when the crane is not triggered, the hook 3 can be stopped at a certain distance from the arm head to prevent the hook 3 from rushing to the top, only when the arm support is vertical to the hook 3, the hook 3 can be embedded into the guide sleeve 6 along with a counterweight block 2 and trigger the upper limit switch 5 to stop running, so as to complete a hook retracting action.

The balancing weight can be embedded into the guide sleeve.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. The hook retracting device of the pitching luffing crane of the offshore platform is characterized by comprising a protective cover, a balancing weight, a lifting hook, an upper limit switch, a guide sleeve and a pitching travel switch, wherein the guide sleeve is fixed in the protective cover, an opening is formed in the middle of the protective cover, the upper limit switch is installed on the guide sleeve, the pitching travel switch is installed at the tail end of a boom, when the boom of the crane is horizontal to a base, the pitching travel switch is triggered, and when the boom is vertical to the lifting hook, the lifting hook is embedded into the guide sleeve along with the balancing weight and triggers the upper limit switch to stop running.

2. The hook retracting device of the offshore platform luffing jib crane according to claim 1, wherein the lower end of the counterweight is integrally connected to the hook, and the counterweight runs along with the hook.

3. The slewing hand-operated apparatus of an offshore platform crane, of claim 1, wherein the counterweight is insertable into the guide sleeve.