Lifting hook assembly and offshore platform crane
The hook assembly for offshore platform cranes uses a protective component with a flexible buffer and brittle connection to prevent damage from excessive loads, ensuring safe operation and reducing maintenance costs by allowing easy reassembly.
Patent Information
- Application Number
- CN202420893942.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-26
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-04-26
AI Technical Summary
Offshore platform cranes face challenges in harsh marine environments due to the sway of transport ships, leading to potential hook assembly misalignment, wire rope breakage, and damage to the crane body when the hook is mistakenly hung on the ship's hull.
A hook assembly with a protective component connected to a guide component via a flexible buffer and a brittle connection, which separates and unfolds to release tension when the load exceeds a preset limit, preventing damage and allowing for easy reassembly.
The design protects the crane and hook assembly from excessive loads, reduces maintenance costs, and ensures safe operation by allowing the hook assembly to be reused after replacing the brittle connector.
Smart Images
Figure CN222273865U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hoisting equipment, in particular to a hook assembly and an offshore platform crane. Background Art
[0002] The offshore platform crane is installed on the wind turbine tower platform and is used to transport materials between the transport ship and the wind turbine tower platform. For example, the materials are vertically lifted from the transport ship to a height slightly higher than the railing of the wind turbine tower platform from the outside of the wind turbine tower platform, and then rotated to the storage area on the wind turbine tower platform to unload the materials.
[0003] Due to the harsh working environment at sea, the transport ship sways up and down and floats unsteadily under the influence of the waves. Therefore, when transferring materials between the wind turbine tower platform and the transport ship, it brings great difficulties to the work of the staff and even poses certain safety hazards.
[0004] In the related art, when transferring materials between a wind turbine tower platform and a transport ship, if the hook assembly is mistakenly hung on the hull of the transport ship, the steel wire rope of the hook assembly will be tightened due to the up and down floating of the transport ship, causing the steel wire rope to break, and in severe cases even causing damage to the crane body. Utility Model Content
[0005] The first aspect of the utility model provides a hook assembly to solve the above-mentioned technical defects in the prior art, which can improve the protection function of the hook assembly and avoid the hook body from being accidentally hung, causing the load of the traction member to exceed the preset load to cause damage to the traction member and the crane body.
[0006] A second aspect of the utility model provides an offshore platform crane.
[0007] The first aspect of the utility model provides a hook assembly, comprising:
[0008] Guide components;
[0009] A protective component is connected to the guide component, and a flexible buffer is also connected between the protective component and the guide component.
[0010] The hook component includes a traction member and a hook body, one end of the traction member is connected to the power output end, the other end of the traction member is passed through the guide component and is connected to the protective component through a brittle connection member, and the hook body is connected to the bottom of the protective component; when the hook body is mistakenly hung so that the load of the traction member exceeds a preset load, the brittle connection member breaks, the protective component is separated from the guide component, and the flexible buffer member is unfolded to connect the protective component and the guide component.
[0011] According to the hook assembly provided by the utility model, the protective component includes:
[0012] A connecting member connected to the guide member via an elastic positioning member;
[0013] A guide sleeve, detachably connected to the connecting piece;
[0014] The movable support member includes a support body and a connecting ear plate, wherein the connecting ear plate is arranged through the support body, the traction member is connected to one end of the connecting ear plate, and the hook body is connected to the other end of the connecting ear plate; the support body is slidably matched with the inner wall of the guide sleeve, and the flexible buffer member is fixedly connected to the support body.
[0015] According to the hook assembly provided by the utility model, the protective component also includes:
[0016] An elastic member is sleeved on the connecting ear plate, one end of the elastic member abuts against the connecting member, and the other end of the elastic member abuts against the movable supporting member.
[0017] According to the hook assembly provided by the utility model, at least one partition is provided on a side of the movable support member facing the connecting member;
[0018] A first storage area is defined between the partition and the connecting ear plate, and the first storage area is used to store the elastic member; a second storage area is defined between the partition and the guide sleeve, and the second storage area is used to store the flexible buffer member.
[0019] According to the hook assembly provided by the utility model, the protective component also includes:
[0020] A protective cover is detachably connected to the bottom of the guide sleeve and is arranged on the outside of the hook body. The protective cover is provided with a hanging opening along the axial direction for hanging cargo on the hook body;
[0021] From the position of the hanging opening to the direction away from the hanging opening, the bottom surface of the protective cover is inclined upward.
[0022] According to the hook assembly provided by the utility model, a balancing piece is provided on the outer side wall of the guide sleeve, and the center line of the balancing piece is arranged opposite to the virtual center line of the hanging opening.
[0023] According to the hook assembly provided by the utility model, the elastic positioning member is arranged on any one of the guide member and the protective member, and the other of the guide member and the protective member is provided with a matching portion that matches and connects with the elastic positioning member.
[0024] According to the hook assembly provided by the utility model, the guide component includes a first guide member;
[0025] The first guide member is suitable for cooperating with the boom guide, the traction member is passed through the first guide member and crimped at the end to form a heart-shaped ring, and the heart-shaped ring is hung on the brittle connecting member; when the brittle connecting member breaks, the traction member drives the first guide member to move synchronously.
[0026] According to the hook assembly provided by the utility model, the guide component further includes a second guide member;
[0027] The second guide member is suitable for being installed on the lifting arm. The second guide member is provided with a guide cavity and an opening communicating with the guide cavity. The first guide member is suitable for extending into the guide cavity from the opening under the action of the traction member.
[0028] According to the hook assembly provided by the utility model, the inner wall of the second guide member is provided with at least one limiting assembly, and the limiting assembly is used to limit the first guide member.
[0029] A second aspect of the utility model provides an offshore platform crane, comprising a crane body and any one of the hook assemblies described above, wherein the hook assembly is arranged on a lifting arm of the crane body.
[0030] The hook assembly provided by the utility model connects the protective component with the guide component through a flexible buffer, and connects the traction component of the hook component with the protective component through a brittle connector, so that the hook body of the hook component is connected to the bottom of the protective component. When the hook body is mistakenly hung so that the load of the traction component exceeds the preset load, the brittle connector breaks, the protective component is separated from the guide component, and the flexible buffer unfolds to connect the protective component and the protective component guide component. This arrangement can improve the protective function of the hook assembly and prevent the hook body from being mistakenly hung, causing the load of the traction component to exceed the preset load and be damaged. For example, if the hook body is mistakenly hung on the hull of a transport ship, the transport ship floats up and down, causing the traction component (wire rope) to be tightened, which in turn causes the traction component (wire rope) to break, and even damages the crane body.
[0031] Specifically, when the brittle connection part breaks and the protective part is separated from the guide part, the traction part drives the guide part to move upward, and the hook body and the protective part move downward under the load to release the load of the traction part (wire rope) and the hook body, thereby playing a protective role. During the downward movement of the hook body and the protective part, the flexible buffer part unfolds to connect the protective part and the guide part. The flexible buffer part can not only play a buffering role, but also prevent the hook body and the protective part from being lost, thereby achieving the purpose of recovery.
[0032] In addition, when the brittle connection part breaks, only the brittle connection part needs to be replaced, and the hook assembly can continue to be used after being reassembled. The structural design is ingenious, which can reduce the use cost of the hook assembly and is highly practical.
[0033] The offshore platform crane provided by the utility model comprises the above-mentioned hook assembly and thus has all the above-mentioned advantages. BRIEF DESCRIPTION OF THE DRAWINGS
[0034] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0035] Figure 1 is a cross-sectional view of a hook assembly provided by an embodiment of the utility model;
[0036] Figure 2 It is a schematic diagram of the structural decomposition of the hook assembly provided by an embodiment of the utility model;
[0037] Figure 3 It is a structural schematic diagram of a movable support member in a hook assembly provided in an embodiment of the utility model;
[0038] Figure 4 It is a structural schematic diagram of a guide sleeve in a hook assembly provided by an embodiment of the utility model;
[0039] Figure 5 It is a cross-sectional view of a guide sleeve in a hook assembly provided by an embodiment of the utility model;
[0040] Figure 6 It is a schematic structural diagram of a protective cover in a hook assembly provided in an embodiment of the utility model.
[0041] Reference numerals:
[0042] 100, guide member; 110, first guide member; 112, connecting portion; 120, second guide member; 121, guide cavity; 122, opening;
[0043] 200, protective component; 210, connecting member; 220, guide sleeve; 221, balancing member; 222, upper flange plate; 223, lower flange plate; 230, movable support member; 231, supporting body; 232, connecting ear plate; 233, partition member; 234, first storage area; 235, second storage area; 236, stop flange; 237, fixing hole; 240, elastic member; 250, protective cover; 251, hanging port; 252, retaining ring; 253, connecting rod; 254, connecting flange;
[0044] 300, hook component; 310, traction member; 320, hook body;
[0045] 400. Flexible buffer; 500. Brittle connector; 600. Limiting assembly; 700. Elastic positioning member. DETAILED DESCRIPTION
[0046] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0047] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.
[0048] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0049] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.
[0050] Figure 1 is a cross-sectional view of a hook assembly provided by an embodiment of the utility model; Figure 2 It is a schematic diagram of the structural decomposition of the hook assembly provided in an embodiment of the utility model.
[0051] See also Figure 1 and Figure 2 An embodiment of the utility model provides a hook assembly, which includes a hook component 300, a guide component 100 and a protective component 200.
[0052] Among them, the protective component 200 is connected to the guide component 100 through an elastic positioning component 700, and a flexible buffer component 400 is also connected between the protective component 200 and the guide component 100. Under normal use, the protective component 200 is nested or abutted against the bottom of the guide component 100, and the flexible buffer component 400 is coiled and stored in the gap between the protective component 200 and the guide component 100.
[0053] The hook component 300 includes a traction member 310 and a hook body 320. One end of the traction member 310 is connected to the power output end, which can be understood as a winch installed on a crane arm or a crane body, and the traction member 310 can be understood as a wire rope. The other end of the traction member 310 is passed through the guide component 100 and connected to the protective component 200 through a brittle connection member 500, that is, the traction member 310 is passed through the guide component 100, and a heart ring is formed by crimping at one end of the traction member 310, and the heart ring is hung on the brittle connection member 500.
[0054] The hook body 320 is connected to the bottom of the protective component 200, that is, the protective component 200 serves as an intermediate connection between the traction member 310 and the hook body 320. When the hook body 320 is hung by mistake, so that the load of the traction member 310 exceeds the preset load, the brittle connection member 500 breaks, the protective component 200 is separated from the guide component 100, and the flexible buffer 400 is unfolded to connect the protective component 200 and the guide component 100.
[0055] This is equivalent to, under normal use, the traction member 310 connects the guide member 100 and the protective member 200 as a whole, that is, the protective member 200 is abutted or nested on the bottom of the guide member 100, and the flexible buffer member 400 is coiled and accommodated in the gap between the protective member 200 and the guide member 100, that is, the flexible buffer member 400 does not participate in the normal use process of the hook assembly.
[0056] When the hook body 320 is mistakenly hung and the load of the traction member 310 exceeds the preset load, when the hook assembly activates the protection function, the traction member 310 pulls the brittle connection member 500 to break, the protection component 200 is separated from the guide component 100, and the flexible buffer member 400 is unfolded to connect the protection component 200 and the guide component 100.
[0057] It should be noted that the flexible buffer 400 can be a safety rope, which is made of stainless steel wire rope with a diameter of 5mm-6mm. The main function of the flexible buffer 400 is to provide buffer protection. When the hook body 320 is hung by mistake and the load of the traction member 310 exceeds the preset load, the hook assembly is divided into two parts, and the flexible buffer 400 is released to release the tension on the traction member 310 and the hook body 320, thereby playing a protective role.
[0058] For example, when the hook body 320 is mistakenly hooked on the hull of a transport ship, in order to prevent the transport ship from floating up and down and causing the traction member 310 (wire rope) to be tightened and cause the traction member 310 (wire rope) to break, a brittle connecting member 500 is provided. When the pulling degree of the traction member 310 (wire rope) is too large, the brittle connecting member 500 directly breaks, causing the connection between the traction member 310 and the protective component 200 to fail. At this time, the hook assembly is divided into two parts, and the flexible buffer 400 is released to release the tension on the traction member 310 and the hook body 320.
[0059] The length of the flexible buffer 400 needs to be greater than the floating height of the hull of the transport ship, which can be obtained based on actual experience. For example, the length of the flexible buffer 400 can be 2m-3m. When the hook body 320 is separated from the hull, the protective component 200 and the hook body 320 can be completely retracted through the flexible buffer 400, and then a new brittle connector 500 can be replaced to continue using the hook assembly.
[0060] It should also be noted that the brittle connector 500 can be a safety pin. When the hook body 320 is mistakenly hung so that the load of the traction member 310 exceeds the preset load, the safety pin breaks immediately to release the load, thereby releasing the tension on the traction member 310 and the hook body 320, thereby playing a protective role.
[0061] Among them, the safety pin must first be made of brittle material, that is, the safety pin breaks immediately when it reaches the tensile strength, and there will not be too much yield deformation. In addition, the safety pin itself has a certain strength, adapts to a wide temperature range, is impact-resistant, wear-resistant, has low environmental resistance, and has low water absorption, so as to adapt to the harsh working environment at sea. The safety pin provided in the embodiment of the utility model can be made of polyoxymethylene (POM). In addition, any structural member that can meet the above performance can be used, and no further details will be given here.
[0062] It can be understood that the hook assembly provided by the embodiment of the utility model connects the protective component 200 with the guide component 100 through the flexible buffer 400, and connects the traction member 310 of the hook component 300 with the protective component 200 through the brittle connection member 500, so that the hook body 320 of the hook component 300 is connected to the bottom of the protective component 200. When the hook body 320 is hung by mistake, so that the load of the traction member 310 exceeds the preset load, the brittle connection member 500 breaks, the protective component 200 is separated from the guide component 100, and the flexible buffer 400 is unfolded to connect the protective component 200 and the guide component 100. This arrangement can improve the protective function of the hook assembly, and prevent the hook body 320 from being hung by mistake, so that the load of the traction member 310 exceeds the preset load and is damaged. If the hook body 320 is mistakenly hooked on the hull of a transport ship, the transport ship floats up and down, causing the traction member 310 (wire rope) to be tightened, which in turn causes the traction member 310 (wire rope) to break, and even damages the crane body.
[0063] Specifically, when the brittle connector 500 breaks and the protective component 200 is separated from the guide component 100, the traction member 310 drives the guide component 100 to move upward, and the hook body 320 and the protective component 200 move downward under the load to release the load of the traction member 310 (wire rope) and the hook body 320, thereby playing a protective role. During the downward movement of the hook body 320 and the protective component 200, the flexible buffer 400 is unfolded to connect the protective component 200 and the guide component 100. The flexible buffer 400 can not only play a buffering role, but also prevent the hook body 320 and the protective component 200 from being lost, thereby achieving the purpose of recovery.
[0064] In addition, when the brittle connector 500 breaks, only the brittle connector 500 needs to be replaced, and the hook assembly can continue to be used after being reassembled. The ingenious structural design can reduce the use cost of the hook assembly and is highly practical.
[0065] Continue reading Figure 1 and Figure 2 In some embodiments of the present invention, the protective component 200 includes a connecting member 210, a guide sleeve 220 and a movable supporting member 230.
[0066] The connecting piece 210 can be sleeved or overlapped on the bottom of the guide component 100 , and the guide sleeve 220 is a cylindrical structure with a hollow structure. The guide sleeve 220 and the connecting piece 210 are detachably connected.
[0067] like Figure 4As shown, the movable support member 230 includes a support body 231 and a connecting ear plate 232. The shape of the support body 231 is adapted to the shape of the guide sleeve 220. The support body 231 is circular. The support body 231 slides with the inner wall of the guide sleeve 220. The flexible buffer member 400 is fixedly connected to the support body 231.
[0068] The connecting ear plate 232 is a strip-shaped structure, and is disposed through the supporting body 231. A first pin hole (not numbered in the figure) is provided at one end of the connecting ear plate 232, and a brittle connecting member 500 (such as a safety pin) is provided through the first pin hole and fixed by a locking member such as a limit pin, and the heart-shaped ring of the traction member 310 is hung on the safety pin. A second pin hole (not numbered in the figure) is provided at the other end of the connecting ear plate 232, and the hook body 320 is fixed by a connecting member such as a pin shaft passing through the second pin hole.
[0069] In an embodiment of the utility model, when the hook body 320 is mistakenly hung and the load of the traction member 310 exceeds the preset load, the brittle connection member 500 breaks and the connection member 210 is separated from the guide member 100. At this time, the traction member 310 drives the guide member 100 to move upward, and the hook body 320, the connection member 210, the guide sleeve 220 and the movable support member 230 move downward under the action of the load to release the load of the traction member 310 (wire rope) and the hook body 320, thereby playing a protective function.
[0070] During the downward movement of the hook body 320, the connecting member 210, the guide sleeve 220 and the movable support member 230, the flexible buffer member 400 is unfolded to tighten the movable support member 230. Since the movable support member 230 is located in the space formed by the connecting member 210 and the guide sleeve 220, that is, the connecting member 210, the guide sleeve 220 and the movable support member 230 are combined into an integral structure. When the movable support member 230 is tightened by the flexible buffer member 400, the overall structure of the protective component 200 formed by the connecting member 210, the guide sleeve 220 and the movable support member 230 is synchronously tightened for recovery to avoid the loss of parts.
[0071] In addition, the support body 231 and the inner wall of the guide sleeve 220 are slidably matched. During the release process of the flexible buffer 400, the sliding friction between the support body 231 and the guide sleeve 220 can play a certain buffering role on the flexible buffer 400, thereby extending the service life of the flexible buffer 400.
[0072] Continue reading Figure 1 and Figure 2 In some embodiments of the present invention, the protective component 200 further includes an elastic member 240 , which is equivalent to the protective component 200 including a connecting member 210 , a guide sleeve 220 , an elastic member 240 and a movable supporting member 230 .
[0073] The structure and connection method of the connecting member 210, the guide sleeve 220 and the movable support member 230 are the same as those of the above embodiment, and are not described in detail here. The elastic member 240 is sleeved on the connecting ear plate 232, one end of the elastic member 240 abuts against the connecting member 210, and the other end of the elastic member 240 abuts against the movable support member 230.
[0074] It is equivalent to that an elastic member 240 is provided between the connecting member 210 and the supporting body 231 of the movable supporting member 230. The elastic member 240 may be a compression spring, which mainly plays a buffering role. When the hook assembly stops immediately, that is, when the traction member 310 stops collecting the rope, the crane will have a certain delay. At this time, the traction member 310 drives the movable supporting member 230 to move upward along the inner wall of the guide sleeve 220 to compress the compression spring. The compression amount of the compression spring absorbs the load and energy of the traction member 310, thereby avoiding a large impact on the internal components caused by the sudden stop of the hook assembly, and improving the reliability and stability of the hook assembly.
[0075] Figure 3 It is a structural schematic diagram of a movable support member in a hook assembly provided in an embodiment of the utility model.
[0076] Continue to refer to 1 and Figure 2 , and also see Figure 3 In some embodiments of the present invention, at least one partition 233 is provided on the side of the support body 231 facing the connecting member 210, that is, at least one partition 233 may be provided on the side of the movable support member 230 facing the connection, or two, three or more partitions 233 may be provided.
[0077] When more than two separators 233 are provided, the separators 233 are arranged in a circular array around the center of the support body 231. For example, when two separators 233 are provided, the central angle between the two separators 233 is 180°, that is, the two separators 233 are symmetrically arranged. The separator 233 may be a plate-shaped member, a rod-shaped member, or a frame structure, as long as the structure can separate the areas on the support body 231. When the separator 233 is a rod-shaped member, the shape of the separator 233 is an inverted "U" shape.
[0078] Among them, a first storage area 234 is limited between the partition 233 and the connecting ear plate 232. The first storage area 234 is circular. The maximum diameter of the first storage area 234 is the same as the outer diameter of the elastic member 240. The first storage area 234 is used to store the elastic member 240 to prevent the elastic member 240 from shaking.
[0079] A second storage area 235 is defined between the partition 233 and the guide sleeve 220. The second storage area 235 is circular and is used to store the flexible buffer 400. The flexible buffer 400 is rolled into a circle and fixed to the partition 233 with a nylon tie. The second storage area 235 and the first storage area 234 are both virtual annular structures, and the center lines of the second storage area 235 and the first storage area 234 are concentric circles.
[0080] By configuring in this way, the elastic member 240 and the flexible buffer member 400 are stored in separate areas, so that problems such as entanglement of the elastic member 240 and the flexible buffer member 400 during use can be avoided, thereby making the structure of the hook assembly more reliable.
[0081] Continue reading Figure 3 In some embodiments of the present invention, a stop flange 236 is provided on the edge of the support body 231 , and the stop flange 236 extends toward one side of the connecting member 210 , and a second storage area 235 is limited between the partition 233 and the stop flange 236 .
[0082] In other words, the movable support member 230 is a columnar structure with a certain height, and the movable support member 230 is formed with a hollow structure in the form of a shell (a drawing method of forming a cavity) from the end face, and the partition member 233 is arranged on the bottom wall of the hollow structure. When the movable support member 230 moves in the guide sleeve 220, the outer wall of the movable support member 230 cooperates with the inner wall of the guide sleeve 220 to play a guiding role.
[0083] This arrangement is equivalent to limiting the first storage area 234 for storing the elastic member 240 and the second storage area 235 for storing the flexible buffer member 400 on the movable support member 230. The structural arrangement is more compact and reliable, and the flexible buffer member 400 is prevented from being scattered between the movable support member 230 and the inner wall of the guide sleeve 220 to affect the movable support member 230 or wear the flexible buffer member 400.
[0084] It should be noted that the movable support member 230 can be integrally formed, or can be welded by the support body 231, the connecting ear plate 232, the partition 233 and the stop flange 236. The movable support member 230 mainly connects the traction member 310 and the hook body 320, so that the pulling force of the traction member 310 is transmitted to the hook body 320 through the movable support member 230, so as to realize the cargo lifting. Moreover, the movable support member 230 can also provide a limiting support and a containing space for the elastic member 240, and at the same time, the movable support member 230 can also provide a storage space and a fixed position for the flexible buffer member 400.
[0085] In addition, a fixing hole 237 is provided on the support body 231 , a fisheye joint is crimped on the end of the flexible buffer 400 , and a screw is passed through the fixing hole 237 to fix the flexible buffer 400 on the support body 231 .
[0086] It should also be noted that, since the connector 210 is connected to the guide sleeve 220 on the one hand, and can be separated or combined with the guide component 100, and the connector 210 provides a limiting support surface for the compression spring on the other hand, the connector 210 can be made of nylon material, that is, the connector 210 is a nylon connector, which can be integrally injection molded, and is more convenient to manufacture. The connector 210 is set to be a nylon material, and when the connector 210 is combined with the guide component 100, it can play a buffering role to reduce the impact between the connector 210 and the guide component 100. Avoid the connector 210 using a rigid part to have a rigid collision with the guide component 100, so as to affect the overall structure of the hook assembly. Of course, the connector 210 can also be made of other materials that can play a buffering role.
[0087] Figure 4 It is a structural schematic diagram of a guide sleeve in a hook assembly provided by an embodiment of the utility model; Figure 5 It is a cross-sectional view of a guide sleeve in a hook assembly provided in an embodiment of the utility model.
[0088] See also Figure 4 and Figure 5 It should be noted that the guide sleeve 220 is a cylindrical structure with a hollow interior. One end of the guide sleeve 220 is open, and the connector 210 is detachably connected to the open end of the guide sleeve 220 through bolts and other fasteners; the other end of the guide sleeve 220 is semi-closed, that is, a through hole is provided at the other end of the guide sleeve 220, and the hook body 320 can be hung down through the through hole. This arrangement is equivalent to an integrally formed arrangement of the guide sleeve 220.
[0089] In addition, the guide sleeve 220 can also be set separately, for example, the guide sleeve 220 includes a sleeve body, an upper flange plate 222 and a lower flange plate 223. The sleeve body is a hollow structure, which can not only provide a movable space for the movement of the movable support 230, but also can accommodate the flexible buffer 400. The upper flange plate 222 is welded and fixed on the top of the sleeve body for connecting with the connecting member 210. The lower flange plate 223 is welded and fixed on the bottom of the sleeve body for connecting with the protective cover 250 described below. The diameter of the upper flange plate 222 is larger than the diameter of the sleeve body, and the movable support 230 and other components can be installed into the sleeve body from one end of the upper flange plate 222. The diameter of the lower flange plate 223 is smaller than the diameter of the sleeve body, and the lower flange plate 223 can limit the movable support 230 and other components to prevent the movable support 230 and other components from falling out of the sleeve body.
[0090] Continue reading Figure 4 A balancing piece 221 is provided on the outer wall of the guide sleeve 220. The balancing piece 221 can be a raised block structure or a groove structure, and any component that can prevent the guide sleeve 220 from rolling freely after falling to the ground is acceptable. Since the overall shape of the hook assembly is cylindrical, the surface of the balancing piece 221 can be a flat surface to limit the hook assembly from rolling freely to avoid accidental injury to the staff.
[0091] Figure 6 It is a schematic structural diagram of a protective cover in a hook assembly provided in an embodiment of the utility model.
[0092] Continue reading Figure 1 and Figure 2 , and also see Figure 6 In some embodiments of the utility model, the protective component 200 also includes a protective cover 250, which is detachably connected to the bottom of the guide sleeve 220 and is arranged on the outer side of the hook body 320. The protective cover 250 is axially provided with a hanging opening 251 for hanging cargo on the hook body 320.
[0093] The problem of the hook assembly being hung by mistake can be alleviated by detachably connecting the protective cover 250 at the bottom of the guide sleeve 220. A hanging opening 251 for hanging cargo on the hook body 320 is provided axially on the protective cover 250, which can facilitate the workers to hang cargo and make the operation more convenient.
[0094] In some embodiments of the present invention, the center line of the balancing member 221 is arranged opposite to the virtual center line of the hanging opening 251 , that is, the balancing member 221 and the hanging opening 251 are located in two opposite directions of the hook assembly.
[0095] When the hook assembly is lowered onto the ship deck, the hook assembly automatically tilts toward the balance member 221 under the action of the protective cover 250 until the hook assembly is laid flat on the ship deck. At this time, the hanging port 251 of the protective cover 250 is facing upward, making it convenient for the hook body 320 to hang cargo.
[0096] Continue reading Figure 6 , from the position of the hanging opening 251 to the direction away from the hanging opening 251, the bottom surface of the protective cover 250 is inclined upward.
[0097] By setting the bottom surface of the protective cover 250 as an inclined surface, when the hook body 320 touches the ground, the entire hook assembly will automatically tilt in a preset direction until the hook assembly is placed flat on the deck, thereby preventing the hook assembly from tilting and injuring workers.
[0098] It should be noted that the protective cover 250 can be integrally formed, or can be a truncated cone-shaped iron cover welded by a guard ring 252, a connecting rod 253 and a connecting flange 254, with a notch provided on the guard ring 252 to form a hanging opening 251. The protective cover 250 is mainly used to shield and protect the opening of the hook body 320 to prevent the hook body 320 from being accidentally hung on the hull or other objects during the lifting process. In addition, the bottom surface of the protective cover 250 is set as an inclined surface. When the hook body 320 touches the ground, the hook assembly will automatically tilt in a preset direction until the hook assembly is placed flat on the deck, so as to prevent the hook assembly from tilting and injuring the staff.
[0099] Continue reading Figure 1 In some embodiments of the utility model, the elastic positioning member 700 is provided on either the guide member 100 or the protective member 200, and the other of the guide member 100 and the protective member 200 is provided with a mating portion that is connected to the elastic positioning member 700 to limit relative rotation and axial movement between the guide member 100 and the protective member 200.
[0100] That is, the elastic positioning member 700 can be provided on the guide member 100, and a matching portion connected to the elastic positioning member 700 can be provided on the protection member 200 accordingly. When the protection member 200 is connected to the guide member 100, the matching portion on the protection member 200 matches and connects with the elastic positioning member 700. Alternatively, a matching portion can be provided on the guide member 100, and an elastic positioning member 700 connected to the matching portion can be provided on the guide member 100 accordingly.
[0101] Specifically, an elastic cylindrical pin can be provided on the first guide member 110 of the guide member 100, and a connection hole that cooperates with the elastic cylindrical pin for connection can be provided on the connection member 210 of the protection member 200. When the connection member 210 is connected to the first guide member 110, the elastic cylindrical pin is inserted into the connection hole to prevent the connection member 210 from rotating and moving axially relative to the first guide member 110.
[0102] Among them, the elastic cylindrical pin is mainly used for positioning and connection between the connecting member 210 and the guide member 100, and the elastic cylindrical pin needs to have good elasticity and shear resistance.
[0103] In addition, a limiting groove is provided on one side of the connecting member 210 facing the guide component 100 , and the guide component 100 is embedded in the limiting groove, and the position of the guide component 100 is limited by the limiting groove.
[0104] Continue reading Figure 1 and Figure 2In some embodiments of the present invention, the guide member 100 includes a first guide member 110, which is suitable for cooperating with the boom guide. The traction member 310 bypasses the fragile connection member 500 and is connected to the first guide member 110, that is, the traction member 310 is passed through the first guide member 110, and a heart ring is crimped at one end of the traction member 310 passing through the first guide member 110, and the heart ring is hung on the fragile connection member 500. The traction member 310 can drive the first guide member 110 to move synchronously. When the traction member 310 collects or releases the rope under the action of the winch, the first guide member 110 moves synchronously with the traction member 310.
[0105] In addition, a connecting portion 112 is provided on one side of the first guide member 110 facing the connecting member 210 , and the connecting portion 112 is used to fix the flexible buffer member 400 , wherein the connecting portion 112 may be a bolt or other component.
[0106] Continue reading Figure 1 and Figure 2 In some embodiments of the utility model, the guide component 100 also includes a second guide member 120, which is suitable for being installed on the lifting arm. The second guide member 120 is provided with a guide cavity 121 and an opening 122 connected to the guide cavity 121. The first guide member 110 is suitable for extending into the guide cavity 121 from the opening 122 under the action of the traction member 310.
[0107] The second guide member 120 can be a part of the boom or a component fixedly mounted on the boom. A guide cavity 121 is provided inside the second guide member 120, and the guide cavity 121 has a bottom opening 122. The top of the second guide member 120 is provided with a top opening for the traction member 310 to extend into the guide cavity 121. When the traction member 310 is hoisted and retracted, the traction member 310 drives the first guide member 110 to move synchronously. During the movement of the first guide member 110, the first guide member 110 can extend into the guide cavity 121 from the bottom opening 122 until it touches the limit assembly 600 on the inner wall of the second guide member 120, and the traction member 310 completely stops moving.
[0108] Specifically, the guide cavity 121 in the second guide member 120 is a tapered cavity with a larger diameter at the bottom and a smaller diameter at the top, and the first guide member 110 is a cone with a smaller outer diameter at the top and a larger diameter at the bottom. The shape of the first guide member 110 is the same as the shape of the guide cavity 121. The second guide member 120 can guide the first guide member 110 to move, so that the first guide member 110 can smoothly extend into the interior of the second guide member 120.
[0109] Continue reading Figure 1 and Figure 2In some embodiments of the present invention, at least one limiting assembly 600 is provided on the inner wall of the second guide member 120, and the limiting assembly 600 is used to limit the position of the first guide member 110. When the first guide member 110 touches the limiting assembly 600, the limiting assembly 600 can feed back the position information of the first guide member 110 to the control system, and control the power output end (winch) to stop working according to the position information of the first guide member 110.
[0110] The limit assembly 600 is a contact position sensor or a proximity position sensor. When the limit assembly 600 is a contact position sensor, the limit assembly 600 can be a travel switch. The travel switch has high triggering stability and is not easily affected by the external environment. It can be applied to lifting equipment on offshore platforms. When the limit assembly 600 is a proximity position sensor, the sensor includes but is not limited to laser induction triggering, electromagnetic field effect induction triggering, and other methods.
[0111] During operation of the hook assembly provided by the embodiment of the utility model, when the hook body 320 is loaded with cargo, the winch drives the traction member 310 to provide power, and the traction member 310 drives the hook body 320 and the cargo on the hook body 320 to move upward or downward.
[0112] When the hook body 320 is mistakenly hooked onto the hull of a transport ship, the hull sways up and down under the action of the waves, and a huge tensile force is applied to the hook body 320. When the load on the brittle connector 500 connected to the traction member 310 exceeds the tensile strength range of its material, the brittle connector 500 will break immediately. The traction member 310 moves upward with the first guide member 110, and the first guide member 110 and the connector 210 are separated. The overall structure composed of the connector 210, the guide sleeve 220, the movable support member 230, the protective cover 250 and the hook body 320 moves downward under the action of the hull. At this time, the hook assembly is divided into two parts, the flexible buffer member 400 is released, the tensile force on the hook body 320 is released, and the traction member 310 and the crane body are protected.
[0113] When the hook body 320 is separated from the hull, the connector 210, guide sleeve 220, movable support 230, protective cover 250 and hook body 320 can be retracted through the flexible buffer 400, the brittle connector 500 can be replaced, and the hook assembly can be reassembled for continued use.
[0114] When the hook assembly is lowered onto the ship deck to load cargo, the protective cover 250 contacts the deck. Since the bottom surface of the protective cover 250 is designed as an inclined surface, the hook assembly as a whole will automatically tilt in a preset direction until the balance piece 221 on the side wall of the guide sleeve 220 contacts the deck. The balance piece 221 restricts the hook assembly from shaking at will. Under the action of the compression spring, the hook body 320 will extend out of the protective cover 250, making it convenient for the staff to hang cargo on the hook.
[0115] After the hook assembly is lifted, under the action of the gravity of the first guide member 110, the connecting member 210, the guide sleeve 220 and the protective cover 250, the elastic member 240 is compressed, and the hook body 320 is retracted into the protective cover 250, which can shield and protect the opening of the hook body 320 to prevent the hook body 320 from being accidentally hung on the hull or other objects during the lifting process. When the hook assembly rises to the second guide member 120 installed in the boom, the first guide member 110 triggers the limit assembly 600, and the hook assembly stops moving immediately. Since the winch runs at a fast speed and the limit assembly 600 has a certain delay, even if the first guide member 110 triggers the limit assembly 600, the hook assembly cannot stop immediately. The hook assembly will continue to rise a short distance, and the traction member 310 drives the movable support member 230 and the hook body 320 to operate to compress the compression spring. The compression spring undergoes elastic deformation to play a buffering role, thereby solving the impact problem caused by the emergency stop after the limit assembly 600 is triggered when the hook assembly is retracted.
[0116] An embodiment of the utility model further provides an offshore platform crane, which comprises a crane body and any one of the above-mentioned hook assemblies, wherein the hook assembly is arranged on a lifting arm of the crane body.
[0117] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.
Claims
1. A hook assembly, characterized in that: include: Guide components; A protective component, wherein the protective component is connected to the guide component, and a flexible buffer is further connected between the protective component and the guide component; The hook component includes a traction member and a hook body, one end of the traction member is connected to the power output end, the other end of the traction member is passed through the guide component and is connected to the protective component through a brittle connection member, and the hook body is connected to the bottom of the protective component; when the hook body is mistakenly hung so that the load of the traction member exceeds a preset load, the brittle connection member breaks, the protective component is separated from the guide component, and the flexible buffer member is unfolded to connect the protective component and the guide component.
2. The hook assembly according to claim 1, characterized in that: The protective component comprises: A connecting member connected to the guide member via an elastic positioning member; A guide sleeve, detachably connected to the connecting piece; The movable support member includes a support body and a connecting ear plate, wherein the connecting ear plate is arranged through the support body, the traction member is connected to one end of the connecting ear plate, and the hook body is connected to the other end of the connecting ear plate; the support body is slidably matched with the inner wall of the guide sleeve, and the flexible buffer member is fixedly connected to the support body.
3. The hook assembly according to claim 2, characterized in that: The protective component also includes: An elastic member is sleeved on the connecting ear plate, one end of the elastic member abuts against the connecting member, and the other end of the elastic member abuts against the movable supporting member.
4. The hook assembly according to claim 3, characterized in that: At least one partition is provided on a side of the support body facing the connecting member; A first storage area is defined between the partition and the connecting ear plate, and the first storage area is used to store the elastic member; a second storage area is defined between the partition and the guide sleeve, and the second storage area is used to store the flexible buffer member.
5. The hook assembly according to claim 2, characterized in that: The protective component also includes: A protective cover is detachably connected to the bottom of the guide sleeve and is arranged on the outside of the hook body. The protective cover is provided with a hanging opening along the axial direction for hanging cargo on the hook body; From the position of the hanging opening to the direction away from the hanging opening, the bottom surface of the protective cover is inclined upward.
6. The hook assembly according to claim 5, characterized in that: A balancing piece is disposed on the outer side wall of the guide sleeve, and a center line of the balancing piece is arranged opposite to a virtual center line of the hanging opening.
7. The hook assembly according to any one of claims 2 to 6, characterized in that: The elastic positioning member is arranged on any one of the guide member and the protection member, and a matching portion which is matched and connected with the elastic positioning member is arranged on the other of the guide member and the protection member.
8. The hook assembly according to any one of claims 1 to 6, characterized in that: The guide member comprises a first guide member; The first guide member is suitable for cooperating with the boom guide, the traction member is passed through the first guide member and crimped at the end to form a heart-shaped ring, and the heart-shaped ring is hung on the brittle connecting member; when the brittle connecting member breaks, the traction member drives the first guide member to move synchronously.
9. The hook assembly according to claim 8, characterized in that: The guide member further comprises a second guide member; The second guide member is suitable for being installed on the lifting arm. The second guide member is provided with a guide cavity and an opening communicating with the guide cavity. The first guide member is suitable for extending into the guide cavity from the opening under the action of the traction member.
10. The hook assembly according to claim 9, characterized in that: At least one limiting component is disposed on the inner wall of the second guide member, and the limiting component is used to limit the first guide member.
11. An offshore platform crane, characterized in that: It comprises a crane body and a hook assembly according to any one of claims 1 to 10, wherein the hook assembly is arranged on the boom of the crane body.