CN116835432A

CN116835432A - Lifting hook of marine crane and use method thereof

Info

Publication number: CN116835432A
Application number: CN202311121231.3A
Authority: CN
Inventors: 邱成国; 王瑞斌; 王嵩
Original assignee: Tianjin Jindao Shipping Co ltd
Current assignee: Tianjin Jindao Shipping Co ltd
Priority date: 2023-09-01
Filing date: 2023-09-01
Publication date: 2023-10-03
Anticipated expiration: 2043-09-01
Also published as: CN116835432B

Abstract

The application belongs to the field of lifting hooks, and relates to a lifting hook of a marine crane and a use method thereof. The shell comprises an upper fixing plate, an upper shell, a counterweight body, a lower shell and a lower fixing plate which are sequentially connected from top to bottom, and the upper part of the hook head is provided with a connecting part and a hook head part. The lifting hook is designed to be attached to the head of the suspension arm, so that potential safety hazards caused by suspension of the lifting hook after the suspension arm is retracted are effectively avoided.

Description

Lifting hook of marine crane and use method thereof

Technical Field

The application belongs to the field of lifting hooks, and relates to a lifting hook of a ship crane and a use method thereof.

Background

Since the height of the ship crane is limited by the height of the stern, the boom 1 needs to be folded and recovered after the ship crane is finished. As shown in fig. 1, after folding and recovering the boom 1, the free falling hook 2 may damage the deck.

CN209192152U discloses a hook connection fixing structure with protective effect, comprising: the lower part of lifting hook is equipped with the base, and hull deck top inboard is equipped with the top and connects the bedplate, and the inboard that is located hull deck bottom is equipped with the bottom and connects the bedplate, and the base of lifting hook lower part passes through the inboard top of bolt and hull deck and connects bedplate fixed connection, and the bottom is connected the bedplate and is passed through the bolt fastening in the protruding department that is located hull deck bottom, and top connection bedplate and bottom connection bedplate pass through wire rope and connect. However, the lifting hook connection fixing structure improves the bearing capacity of the lifting hook connection fixing structure by improving the contact area of the connection part, relieves damage or destruction of a deck of a ship body in the lifting process, and cannot solve the problem of damage of the lifting hook to the deck after the working of the crane is finished.

In order to solve the above problems, there are two solutions, the first one is that, as shown in fig. 2, a pair of ear plates 3 are arranged on the suspension arm 1, and because the suspension hook 2 is heavy, it takes time and labor to manually pull the suspension hook 2 to the ear plates 3, and meanwhile, there is a potential safety hazard; in addition, adding hydraulic or motor devices and other equipment increases the burden of the system and complicates it more, so that there is a certain difficulty in matching and fixing the lifting hook 2 with the lug plate 3. Second, as shown in fig. 3, a supporting block 4 and an ear plate 3 are arranged on the deck, the tail end of the lifting hook 2 is firstly put on the supporting block 4, the lifting arm 1 is further adjusted when the lifting arm 1 is recovered, so that the lifting hook 2 is just put on the supporting block 4, and then the lifting hook 2 and the ear plate 3 are connected and fixed through a rope. On the one hand, because of the limitation of the size, angle and the like of the supporting block 4, the tightening effect of the steel wire rope is not good, and on the other hand, the supporting block 4 is arranged on the deck to occupy space, and can also obstruct the normal activities and operations of people and is also not attractive.

Disclosure of Invention

The application aims to overcome the defects of the prior art and provide the lifting hook of the marine crane, which is scientific and reasonable in structural design and simple and convenient to operate, and the use method thereof.

The technical scheme adopted for solving the technical problems is as follows:

a first aspect of the present application provides a hook for a marine crane, comprising: and the limiting piece and the lifting hook component.

The limiting piece comprises a supporting piece and a connecting piece, wherein the supporting piece and the connecting piece are both cylinders and are coaxially connected, two lifting lugs are symmetrically and fixedly arranged on the outer wall of the connecting piece, one lifting lug is connected with the sensor through a chain, the other lifting lug is connected with the chain fixing piece through a chain, the sensor and the chain fixing piece are respectively and fixedly arranged on two side surfaces of the head of the suspension arm, the sensor is provided with two working modes, namely a lifting hook working mode and a hooking mode, and in the lifting hook working mode, after the sensor is triggered, the wire rope is prevented from continuously tightening; in the hook-closing mode, after the sensor is triggered, the steel wire rope still continues to be tightened.

The hook assembly includes: the device comprises a shell, a steel wire rope connecting piece, two connecting plates and a hook head. The shell is a cylinder and comprises an upper fixing plate, an upper shell, a counterweight body, a lower shell and a lower fixing plate which are sequentially connected from top to bottom, wherein the upper shell and the lower shell are pipe bodies, the upper shell is provided with an upper flange connecting end, the upper flange connecting end is connected with the upper fixing plate through a bolt, the lower shell is provided with a lower flange connecting end, and the lower flange connecting end is connected with the lower fixing plate through a bolt; the steel wire rope connecting piece is positioned in the upper shell and provided with a first end and a second end, and the first end is connected with the steel wire rope; the two connecting plates penetrate through the upper shell, the counterweight body and the lower shell, the two connecting plates are arranged in parallel at intervals, the connecting plates are provided with an upper end and a lower end, the upper end is connected with the second end of the steel wire rope connecting piece through a first fixing pin, and the counterweight body is fixedly arranged in the middle of the two connecting plates through a bolt; the upper part of the hook head is provided with a connecting part and a hook head part, the connecting part is fixedly connected with the lower ends of the two connecting plates through a second fixing pin, the connecting part is positioned in the lower shell, and the hook head part penetrates out of the lower fixing plate and is positioned outside the shell.

Further, the support is made of nylon material.

Further, the device also comprises a guide mechanism which is arranged on the inner wall of the connecting piece.

Further, the hook head is a rotatable hook head.

Further, a backing plate is fixedly arranged between the two connecting plates.

Further, two first fixing pin avoiding holes are formed in the upper shell, and two second fixing pin avoiding holes are formed in the lower shell.

The second aspect of the application provides a method for using the lifting hook of the marine crane, when the lifting hook is in a working state, the chain and the limiting piece connected with the chain are kept still, and the lifting hook component is driven to lift a heavy object through the retraction of the steel wire rope and the movement of the lifting arm; when the lifting hook is in a lifting state, the lifting hook component is lifted upwards by the shrinkage steel wire rope, and when the lifting hook component is lifted to be attached to the limiting piece, the steel wire rope continues to tighten until the top surface of the limiting piece is contacted with the head of the lifting arm, and finally the lifting arm is folded and retracted.

The application has the advantages and positive effects that:

1. the lifting hook is designed to be attached to the head of the suspension arm, so that potential safety hazards caused by suspension of the lifting hook after the suspension arm is retracted are effectively avoided.

2. According to the application, the limiting piece ensures that the lifting hook accurately reaches a preset position in the tightening process to realize ring buckling, so that the problem of unstable shrinkage and fixation of the lifting hook in the traction state of the steel wire rope is solved.

Drawings

FIG. 1 is a schematic diagram of a boom and a hook of the prior art;

FIG. 2 is a schematic view of a first hook receiving solution according to the background art;

FIG. 3 is a schematic view of a second hook receiving scheme in the background art;

FIG. 4 is a perspective view of a hook according to an embodiment of the present application;

FIG. 5 is a perspective view of a spacing member according to an embodiment of the present application;

FIG. 6 is a front view of an embodiment of the present application with the hooks pulled taut to the boom head;

FIG. 7 is a rear view of an embodiment of the present application with the hook tensioned to the boom head;

FIG. 8 is a perspective view of a hook assembly according to an embodiment of the application;

FIG. 9 is a cross-sectional view of a hook assembly according to an embodiment of the application;

FIG. 10 is a view showing the working state of the hook according to the embodiment of the present application;

FIG. 11 is a view showing the attachment of the hook assembly to the retainer according to the embodiment of the present application;

FIG. 12 is a view showing the attachment of the hook to the head of the boom according to an embodiment of the present application;

fig. 13 is a state diagram of the hanger after the boom is fully folded and retracted according to an embodiment of the present application.

Wherein the above figures include the following reference numerals:

1-a suspension arm; 2-lifting hooks; 3-ear plates; 4-supporting blocks; 5-limiting pieces; 51-a support; 52-connecting piece; 53-lifting lugs; 6-hook assembly; 61-a housing; 611-upper fixing plate; 612-upper housing; 613-counterweight; 614-lower housing; 615-lower fixing plate; 62-wire rope connector; 63-connecting plates; 64-hook heads; 641-connection; 642-hook head; 65-a first fixing pin; 66-a second fixing pin; 67-first fixing pin avoiding holes; 68-second fixing pin avoidance holes; 7-a sensor; 8-a chain fixing member; 9-boom head; 10-a chain; 11-steel wire rope.

Detailed Description

The application is further illustrated by the following examples, which are intended to be illustrative only and not limiting in any way.

In the description of the present application, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present application and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

The application provides a lifting hook of a ship crane, as shown in fig. 4, comprising: a spacing member 5 and a hook assembly 6. As shown in fig. 5, the limiting member 5 includes a supporting member 51 and a connecting member 52, and the supporting member 51 and the connecting member 52 are both cylindrical and coaxially connected. In order to enable cushioning and increase friction, the support 51 is made of nylon material.

As shown in fig. 6-7, two lifting lugs 53 are symmetrically and fixedly arranged on the outer wall of the connecting piece 52, one lifting lug 53 is connected with the sensor 7 through a chain 10, the other lifting lug 53 is connected with the chain fixing piece 8 through the chain 10, and the sensor 7 and the chain fixing piece 8 are respectively and fixedly arranged on two side surfaces of the boom head 9. The limiting piece 5 and lifting lugs 53 at the two ends are utilized to ensure that the limiting piece 5 and the suspension arm head 9 can be connected in an axial mode, and then the lifting hook is stably in a static state.

The sensor 7 is a proximity switch and is provided with two working modes, namely a hook working mode and a hook collecting mode. The lifting hook operation mode and the hooking mode are preset on a control panel of the crane. In the lifting hook operation mode, after the lifting hook assembly 6 touches the limiting piece 5, the chain 10 connected with the lifting lug 53 is loosened, so that a switch of the sensor 7 connected with the chain 10 is closed, a signal is given to a winch controller, and the wire rope 11 is prevented from being continuously tightened; in the hook-up mode, the sensor 7 is not active, and the wire rope 11 can continue to be tightened even if the sensor 7 is switched on.

In order to make the wire rope 11 pass through the inside of the limiting piece 5 along a determined direction and facilitate the extension of the wire rope 11 inside the limiting piece 5, a guiding mechanism is arranged on the inner wall of the connecting piece 52. When the hook is retracted, the wire rope 11 pulls the hook assembly 6 to move upwards, and when the hook assembly 6 is propped against the lower end of the limiting piece 5, the sensor 7 is triggered, but the wire rope 11 is not prevented from being continuously tightened due to the fact that the sensor is in the hook retraction mode. The wire rope 11 continues to pull the hook assembly 6 and the stop 5 until the top surface of the stop 5 contacts the boom head 9. The setting of locating part 5 accurate control wire rope 11 has guaranteed that the lifting hook is accurate to reach the preset position and has realized the ring and detain mutually in tightening up the in-process, has effectively solved the unstable problem of lifting hook shrink fixed under wire rope 11 traction state.

As shown in fig. 8 to 9, the hook assembly 6 includes: a shell 61, a wire rope connector 62, two connecting plates 63 and a hook head 64.

The housing 61 serves to protect the internal structure from external factors. The cylindrical housing 61 includes an upper fixing plate 611, an upper housing 612, a weight 613, a lower housing 614, and a lower fixing plate 615, which are sequentially connected from top to bottom. The upper housing 612 and the lower housing 614 are tubular bodies, the upper housing 612 has an upper flange connection end, the upper flange connection end is connected with the upper fixing plate 611 through a bolt, the lower housing 614 has a lower flange connection end, and the lower flange connection end is connected with the lower fixing plate 615 through a bolt. The weight 613 prevents the hook head 64 from shaking by providing a certain weight, and serves to maintain the stability of the hook. In addition, the counterweight 613 also plays a role in supporting.

The wire rope connector 62 located inside the upper housing 612 has a first end and a second end, the first end being connected to the wire rope 11; the two connection plates 63 penetrate through the upper housing 612, the counterweight 613 and the lower housing 614, the two connection plates 63 are arranged in parallel at intervals, the connection plates 63 have an upper end and a lower end, the upper end is connected with the second end of the wire rope connector 62 through a first fixing pin 65, and the counterweight 613 is fixedly mounted with the middle parts of the two connection plates 63 through bolts. In order to make the two connection plates 63 more balanced and stable, a pad is fixedly arranged between the two connection plates 63. Meanwhile, the pad can increase the weight in the middle of the connection plate 63, thereby improving stability. The hook head 64 has a connection portion 641 and a hook head portion 642 at an upper portion thereof, and the hook head 64 is provided as a rotatable hook head in order to make the hook head 64 applicable in all directions.

The connection portion 641 is fixedly connected to the lower ends of the two connection plates 63 by a second fixing pin 66. The connection portion 641 is positioned in the lower case 614, and the hook head 642 is penetrated from the lower fixing plate 615 to be positioned outside the case 61. In order to facilitate maintenance and repair of the fixing pin, two first fixing pin avoiding holes 67 are formed in the upper case 612, and two second fixing pin avoiding holes 68 are formed in the lower case 614. When the wire 11 falls freely, the force on the wire 11 is transmitted along the wire 11 to the wire connector 62, then along the wire connector 62 to the two connection plates 63, and finally along the connection plates 63 to the hook head 64. The lifting hook component 6 greatly increases the stability of the lifting hook, avoids the swing of the steel wire rope 11, and ensures the stable lifting of the lifting hook; on the other hand, the lifting hook is enabled to be fixed on the head part 9 of the suspension arm in a static mode, and damage of the lifting hook to a deck is effectively avoided.

The application also provides a use method of the lifting hook of the marine crane. As shown in fig. 10-13, when the hook is used for lifting a heavy object, the chain 10 and the limiting piece 5 connected with the chain 10 are kept still, and the wire rope 11 is retracted to drive the hook assembly 6 to lift the heavy object. The limiting part 5 is kept motionless, the steel wire rope 11 drives the lifting hook component 6 to lift the weight, the whole system has a safety protection effect, and the normal operation of work is facilitated.

After the lifting hook finishes the work of lifting the heavy object, the operation of collecting the hook comprises the following three steps: first, as shown in fig. 10, in a raised state of the boom 1, the wire rope 11 is contracted, and the hook assembly 6 is lifted upward; secondly, as shown in fig. 11, the hook assembly 6 is lifted to be attached to the limiting piece 5, and then as shown in fig. 12, the wire rope 11 continues to pull the hook assembly 6 and the limiting piece 5 until the top surface of the limiting piece 5 is contacted with the boom head 9; third, as shown in fig. 13, the boom 1 starts to fold until it is in a fully folded state. Preferably, in the first step, when the wire 11 lifts the hook assembly 6 and the chain 10 to lift the whole of the hook, the bottom surface of the boom head 9 is kept parallel to the horizontal plane, so that the wire 11 passing out from the middle of the boom head 9 can stretch the hook, so that the hook is more easily located in the middle of the boom head 9.

The foregoing is merely a preferred embodiment of the present application, and it should be noted that it will be apparent to those skilled in the art that variations and modifications can be made without departing from the scope of the application.

Claims

1. A hook for a marine crane, comprising:

the limiting piece (5), the limiting piece (5) comprises a supporting piece (51) and a connecting piece (52), the supporting piece (51) and the connecting piece (52) are both cylinders and are coaxially connected, two lifting lugs (53) are symmetrically and fixedly arranged on the outer wall of the connecting piece (52), one lifting lug (53) is connected with a sensor (7) through a chain (10), the other lifting lug (53) is connected with a chain fixing piece (8) through the chain (10), the sensor (7) and the chain fixing piece (8) are fixedly arranged on two side surfaces of a boom head (9) respectively, the sensor (7) is provided with two working modes, namely a lifting hook working mode and a hooking mode, and under the lifting hook working mode, after the sensor (7) is triggered, the wire rope (11) is prevented from continuously tightening; in the hook-closing mode, after the sensor (7) is triggered, the steel wire rope (11) still continues to be tightened;

a hook assembly (6), the hook assembly (6) comprising:

the shell (61), the shell (61) is a cylinder, and comprises an upper fixed plate (611), an upper shell (612), a counterweight body (613), a lower shell (614) and a lower fixed plate (615) which are sequentially connected from top to bottom, wherein the upper shell (612) and the lower shell (614) are pipe bodies, the upper shell (612) is provided with an upper flange connecting end, the upper flange connecting end is connected with the upper fixed plate (611) through a bolt, the lower shell (614) is provided with a lower flange connecting end, and the lower flange connecting end is connected with the lower fixed plate (615) through a bolt;

a wire rope connector (62), the wire rope connector (62) being located within the upper housing (612), the wire rope connector (62) having a first end and a second end, the first end being connected to a wire rope (11);

the two connecting plates (63) penetrate through the upper shell (612), the counterweight body (613) and the lower shell (614), the two connecting plates (63) are arranged at intervals in parallel, the connecting plates (63) are provided with an upper end and a lower end, the upper end is connected with the second end of the steel wire rope connecting piece (62) through a first fixing pin (65), and the counterweight body (613) is fixedly arranged at the middle part of the two connecting plates (63) through bolts;

and the hook head (64), the upper portion of the hook head (64) is provided with a connecting part (641) and a hook head part (642), the connecting part (641) is fixedly connected with the lower ends of the two connecting plates (63) through a second fixing pin (66), the connecting part (641) is positioned in the lower shell (614), and the hook head part (642) penetrates out of the lower fixing plate (615) and is positioned outside the shell (61).

2. A lifting hook of a marine crane according to claim 1, wherein the support member (51) is made of nylon material.

3. A lifting hook for a marine crane according to claim 2, further comprising a guide mechanism mounted to an inner wall of the connector (52).

4. A lifting hook of a marine crane according to claim 3, characterized in that the hook head (64) is a rotatable hook head.

5. A hook for a marine crane according to claim 4, characterised in that a backing plate is secured between the two connection plates (63).

6. The lifting hook of a marine crane according to claim 5, wherein two first fixing pin avoiding holes (67) are formed in the upper shell (612), and two second fixing pin avoiding holes (68) are formed in the lower shell (614).

7. The method for using the lifting hook of the marine crane according to any one of claims 1 to 6, wherein,

when the lifting hook is in a working state, the chain (10) and the limiting piece (5) connected with the chain (10) are kept still, and the lifting hook component (6) is driven to hoist a heavy object through the retraction of the steel wire rope (11) and the movement of the lifting arm (1);

when the lifting hook is in a lifting state, the lifting hook assembly (6) is lifted upwards by the shrinkage steel wire rope (11) firstly, after the lifting hook assembly (6) is lifted to be attached to the limiting piece (5), the steel wire rope (11) continues to tighten until the top surface of the limiting piece (5) is contacted with the head part (9) of the lifting arm, and finally the lifting arm (1) is folded and retracted.