A marine platform crane hook head take-up device
By designing a crane hook tightening device for offshore platforms, which uses springs and scales to fix the crane hook, the problem of the crane hook swaying in strong winds was solved, improving operational safety and protecting platform facilities.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHANJIANG BRANCH OF CHINA NATIONAL OFFSHORE OIL CORP
- Filing Date
- 2025-07-29
- Publication Date
- 2026-07-31
AI Technical Summary
The crane hooks on offshore platforms sway violently in strong winds or typhoons, posing a safety hazard. Existing securing measures are prone to damaging platform facilities, making operation inconvenient and costly.
Design a crane hook tightening device that includes a housing and a tightening structure. The hook is fixed by a spring and a scale, and the force is monitored in real time through an observation window to ensure proper tightening and loosening of the slings.
It effectively reduces crane hook sway, lowers accident risk, protects platform facilities, and improves operational safety and convenience.
Smart Images
Figure CN224577885U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of offshore oil and gas production technology, specifically relating to a crane hook tightening device for offshore platforms. Background Technology
[0002] Offshore oil and gas production platforms, being far from land and with limited space, cannot use conventional land-based material transport vehicles. Their material transport primarily relies on crane operations. The crane and the material being lifted are connected by slings, which are suspended from hooks at the end of the crane's wire rope. For safety reasons, after crane operations are completed, the wire rope is usually not fully retracted, resulting in the hook and part of the wire rope dangling below the boom.
[0003] Under normal circumstances, the hook's own weight is sufficient to stabilize its suspended state and does not affect the crane's safety. However, when encountering strong winds or typhoons at sea, the strong winds can cause the hook to swing violently. If effective measures are not taken to secure the hook, its large-scale swaying may collide and damage other facilities, or may cause the wire rope to come out of the pulley groove (i.e., "rope slippage"), posing a serious safety hazard.
[0004] Currently, before strong winds arrive, a common measure to prevent significant swaying of the deck is to temporarily secure the hook to the deck railing using lifting slings. While this meets basic securing requirements, field experience shows that this method has the following problems:
[0005] The primary function of offshore platform railings is to prevent people from falling overboard, and under normal circumstances, no heavy objects should be attached to them. Furthermore, due to the high temperature and humidity of the marine environment, offshore platform railings are prone to corrosion; attaching stress points to the railings would cause damage.
[0006] Because the slings have limited deformation capacity, excessive force can easily be applied during the tightening of the crane wire rope, causing the railing to deform. Even when attached to other stress points, the slings can easily break due to excessive force, resulting in injuries.
[0007] During the hook tightening process, the only force that personnel can see is the weight display on the crane. However, since offshore cranes are used to lift heavy objects, the weight display is not accurate, which can easily lead to the crane applying excessive force to the hook tightening point.
[0008] When personnel tighten the hook, the lack of a separate hook attachment point and attachment device makes operation extremely inconvenient and increases on-site management costs. Summary of the Invention
[0009] The purpose of this utility model is to provide a hook tightening device for offshore platform cranes, which can fix the hook of the sling of offshore platform cranes and reduce the risk of accidents caused by the swaying of the offshore platform crane hook.
[0010] To achieve the above-mentioned technical objectives, this utility model adopts the following technical solution: a hook tightening device for an offshore platform crane, characterized in that: it includes a housing and a tightening structure installed inside the housing; a cover plate is movably connected to the top surface of the housing, and an observation window is provided on the front side; the tightening structure includes a shell, a fixing buckle, a spring, a first spring fixing block, a second spring fixing block, a first connecting rod, a second connecting rod, a pointer, and a connecting ring disposed inside the housing; the spring is disposed inside the shell and its upper and lower ends are respectively fixedly connected to the first spring fixing block and the second spring fixing block, and the second connecting rod... The rod passes through the bottom surface of the housing and is fixedly connected to the bottom surface of the housing. The upper end of the second connecting rod is fixedly connected to the second spring fixing block, and the lower end is connected to the fixing buckle outside the housing. The fixing buckle is fixedly connected to the bottom surface of the housing. The lower end of the first connecting rod is fixedly connected to the first connecting block, and the upper end extends out of the housing and is connected to the connecting ring. A force scale is provided on the side of the housing facing the observation window. A long strip-shaped moving groove is opened on one side of the force scale. The end of the pointer is bent and passes through the long strip-shaped moving groove and is fixedly connected to the first spring fixing block. After connection, the pointer tip points to the force scale.
[0011] Furthermore, a handle is attached to the cover plate.
[0012] Furthermore, a drain outlet is provided at the bottom of the box.
[0013] Furthermore, a transparent acrylic baffle is installed on the observation window.
[0014] Furthermore, one side of the cover plate is connected to the housing via a hinge.
[0015] Furthermore, the upper end of the first connecting rod has a first connecting hole, and the connecting ring is connected to the first connecting hole. The lower end of the second connecting rod has a second connecting hole, and the fixing buckle is a semi-circular steel bar. After the semi-circular steel bar passes through the second connecting hole, both ends are fixed to the bottom surface of the box body.
[0016] Furthermore, the enclosure and cover are made of 316L stainless steel.
[0017] The beneficial effects of this utility model are: by welding and fixing the tightening device of this utility model to the offshore platform, the hook of the sling of the offshore platform crane can be quickly fixed, reducing the risk of accidents caused by the swaying of the offshore platform crane hook, and making the offshore crane safer and more reliable during use. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of the structure of this utility model.
[0020] Figure 2 for Figure 1 A schematic diagram showing the middle cover plate in the open position.
[0021] Figure 3 This is a schematic diagram of the tightening structure in this utility model. Detailed Implementation
[0022] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0023] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.
[0024] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0025] Furthermore, 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 number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0026] Please refer to the following: Figures 1 to 3The present invention will now describe a crane hook tightening device for offshore platforms.
[0027] like Figure 1 As shown, a crane hook tightening device for an offshore platform includes a housing 100 and a tightening structure 200 installed inside the housing. The top surface of the housing 100 has a window, and a cover plate 101 is connected to the window via a hinge. A handle 102 is connected to the cover plate 101. An observation window 103 is provided on the front side of the housing 100, and a transparent acrylic baffle is installed on the observation window 103; the tightening structure 200 inside the housing can be viewed through the observation window. A drain outlet 104 is provided at the bottom of the housing 100. Preferably, the housing 100 and the cover plate 101 are made of 316L stainless steel, which is rust-proof, corrosion-resistant, and has a long service life.
[0028] like Figure 2 As shown, the tightening structure 200 includes a housing 201, a fixing buckle 202, a spring 203, a first spring fixing block 204, a second spring fixing block 205, a first connecting rod 206, a second connecting rod 207, a pointer 208, and a connecting ring 209 disposed within the housing 100.
[0029] Spring 203, first spring fixing block 204, and second spring fixing block 205 are disposed inside the housing. The first spring fixing block 204 is fixedly connected to the upper end of spring 203. The lower end of the first connecting rod 206 is fixedly connected to the first spring fixing block 204, and the upper end passes through a through hole on the top surface of housing 201 and connects to connecting ring 209. The second spring fixing block 205 is fixedly connected to the lower end of spring 203. The second connecting rod 207 passes through the bottom surface of housing 201 and is fixedly connected to the bottom surface of housing 201; the upper end of the second connecting rod 207 is fixedly connected to the second spring fixing block 205, and the lower end of the second connecting rod 207 is connected to fixing buckle 202. Fixing buckle 202 is fixedly welded to the bottom surface of the housing. A force scale 210 is provided on the side of the housing 201 facing the observation window. A long strip-shaped moving groove 211 is provided on one side of the force scale 210. The end of the pointer 208 is bent and passes through the long strip-shaped moving groove 211 and is fixedly connected to the first spring fixing block 204. After connection, the pointer tip points to the force scale 210. When the first spring fixing block 204 moves, it can drive the pointer 208 to move, pointing to different scales, and the force magnitude can be read through the corresponding scale.
[0030] Preferably, the upper end of the first connecting rod 206 has a first connecting hole, and the connecting ring 209 is connected to the first connecting hole. The lower end of the second connecting rod 207 has a second connecting hole, and the fixing buckle 202 is a semi-circular steel bar. After the semi-circular steel bar passes through the second connecting hole, both ends are fixed to the inner bottom surface of the box body 100.
[0031] When using this invention on an offshore platform, the housing 100 of the tightening device is directly welded to a suitable position on the platform deck. When strong winds occur and the crane hook needs to be secured, the cover plate 101 is opened, the crane hook is connected to the connecting ring 209, and then the crane is operated to gradually tighten the wire rope, raising the hook height. The position of the indicator pointer 208 is observed through the observation window 103. When the pointer reaches the corresponding force scale position, it indicates that the hook force has reached the required level, and the crane stops tightening the wire rope. When the strong winds have passed, the crane is started again, and the hook height is lowered until the connecting ring 209 is no longer under force. At this point, the connection between the connecting ring 209 and the hook is disconnected, the cover plate 101 is closed, and the device is ready for the next use.
[0032] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.
Claims
1. An offshore platform crane hook head take-up device characterized by: Includes the enclosure and the tightening structure installed inside the enclosure; The top surface of the box is movably connected to a cover plate, and an observation window is provided on the front side. The tightening structure includes a shell, a fixing buckle, a spring, a first spring fixing block, a second spring fixing block, a first connecting rod, a second connecting rod, a pointer, and a connecting ring, all housed within the housing. The spring is housed within the shell and its upper and lower ends are fixedly connected to the first spring fixing block and the second spring fixing block, respectively. The second connecting rod passes through the bottom surface of the shell and is fixedly connected to the bottom surface of the shell. The upper end of the second connecting rod is fixedly connected to the second spring fixing block, and its lower end is connected to the fixing buckle outside the shell. The fixing buckle is fixedly connected to the bottom surface of the housing. The lower end of the first connecting rod is fixedly connected to the first connecting block, and its upper end extends out of the shell and is connected to the connecting ring. A force scale is provided on the side of the shell facing the observation window. A long, narrow moving groove is provided on one side of the force scale. The end of the pointer is bent, passes through the long, narrow moving groove, and is fixedly connected to the first spring fixing block. After connection, the pointer tip points to the force scale.
2. A marine platform crane hook take-up device according to claim 1, characterised in that: A handle is attached to the cover plate.
3. The offshore platform crane hook tightening device according to claim 1, characterized in that: The lower part of the box is provided with a drain outlet.
4. The offshore platform crane hook tightening device according to claim 1, characterized in that: A transparent acrylic baffle is installed on the observation window.
5. The offshore platform crane hook tightening device according to claim 1, characterized in that: One side of the cover is connected to the box body via a hinge.
6. The offshore platform crane hook tightening device according to claim 1, characterized in that: The upper end of the first connecting rod has a first connecting hole, and the connecting ring is connected to the first connecting hole.
7. The offshore platform crane hook tightening device according to claim 1, characterized in that: The lower end of the second connecting rod is provided with a second connecting hole. The fixing buckle is a semi-circular steel bar. After the semi-circular steel bar passes through the second connecting hole, both ends are fixed to the bottom surface of the box body.
8. The offshore platform crane hook tightening device according to any one of claims 1-7, characterized in that: The enclosure and cover are made of 316L stainless steel.