Bridge type grab ship unloader three-hook lateral complete machine hoisting method based on four-main-hook floating crane

Abstract

The invention discloses a three-hook lateral complete machine hoisting method for a bridge type grab ship unloader based on a four-main-hook floating crane, which comprises the following steps of: forming an acute angle between a floating crane boom and a shoreline of a wharf, and hoisting the complete machine from the lateral direction of the bridge type grab ship unloader; a plurality of floating crane main hooks on the floating crane boom are asymmetrically arranged, namely the floating crane main hooks on the land side surface are odd, and the floating crane main hooks on the sea side surface are even; the floating crane main hook is provided with a rigging tool and an anti-interference mechanism; and a hoisting lug is arranged at the joint between the upright post at the upper part of the door frame of the bridge type grab ship unloader and the connecting cross beam. The invention aims to solve the technical problem that the whole machine cannot be hoisted ashore from the front side under the condition that the floating crane is limited by the hoisting capacity, the working space and the like.

Description

Technical Field

[0001] This invention relates to the whole-machine hoisting technology of bridge grab unloaders in steel port machinery, and more specifically, to a three-hook lateral whole-machine hoisting method for bridge grab unloaders based on a four-main-hook floating crane. Background Technology

[0002] Currently, traditional bridge grab unloaders are typically large, fixed structures, and their installation on docks is a massive and complex project. For example... Figure 1 As shown, the traditional installation method requires disassembling the entire machine into multiple components, including the gantry frame assembly 1, front beam assembly 2, front tie rod 3, trapezoidal frame assembly 4, rear support pipe 5, machine room assembly 6, rear beam assembly 7, and unloading system 8, etc., which are then assembled, welded, spliced, and debugged one by one on-site at the dock. This method has problems such as long construction period, large amount of on-site work, high installation cost, and significant impact on normal dock operation. In addition, many old docks are limited by existing corridor layout, space constraints for placing new equipment among existing equipment, and dock load-bearing capacity. To ensure the integrity of the overall structure, shorten the equipment placement time, and minimize the impact on normal dock production, more and more bridge grab unloader projects need to adopt the method of hoisting the entire machine ashore.

[0003] However, conventional bridge grab unloaders vary significantly in weight and size due to differences in productivity, requiring corresponding lifting solutions to be tailored to each machine. Large bridge grab unloaders typically weigh around 2,400 tons and are enormous in size. Most floating cranes, limited by their lifting capacity and operating space, cannot lift the entire machine from the front. They often need to consider lifting from the side of the equipment, avoiding major structural components, further increasing the difficulty of solution development and implementation. Summary of the Invention

[0004] In view of the deficiencies in the existing technology, the purpose of this invention is to provide a three-hook lateral hoisting method for a bridge grab unloader based on a four-main-hook floating crane, which aims to solve the technical problem that the floating crane is unable to complete the hoisting of the whole machine ashore from the front due to limitations in hoisting capacity and working space.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A method for lateral hoisting of a bridge grab unloader based on a four-main-hook floating crane;

[0007] The floating crane boom forms an acute angle with the shoreline of the wharf, allowing the entire machine to be lifted from the side of the bridge grab unloader;

[0008] The floating crane boom has multiple main hooks in an asymmetrical configuration, with an odd number of main hooks on the land side and an even number on the sea side.

[0009] Each of the floating crane's main hooks is equipped with rigging tools and anti-interference mechanisms;

[0010] Lifting lugs are installed at the connection between the column and the connecting beam on the upper part of the gate frame of the bridge grab unloader.

[0011] Preferably, the acute angle between the floating crane boom and the shoreline of the wharf is 45°±1°.

[0012] Preferably, the floating crane has four main hooks;

[0013] The floating crane on the land side uses one main hook, which corresponds to the two lifting lugs on the bridge grab unloader.

[0014] Two main hooks are used on the sea side of the floating crane, and each main hook corresponds to one of the lifting lugs on the bridge grab unloader.

[0015] Preferably, the main hook of the floating crane is equipped with rigging fixtures and anti-interference mechanisms, specifically including:

[0016] On the land side, a first wire rope loop is provided on both ends of the main hook of the floating crane. The first wire rope loops on the same side of both ends are connected to the lifting beam, so that the lifting beam is set in the horizontal direction. A second wire rope loop and a third wire rope loop are connected to both ends of each lifting beam in sequence. The second wire rope loop and the third wire rope loop are connected by a first locking hook device. The third wire rope loop is connected to the corresponding lifting lug.

[0017] On the two main hooks of the floating cranes on the sea side, a fourth wire rope ring, a fifth wire rope ring, and a sixth wire rope ring are connected in sequence. The fourth wire rope ring and the fifth wire rope ring are connected by a shackle, and the fifth wire rope ring and the sixth wire rope ring are connected by a second locking hook. The sixth wire rope ring is connected to the corresponding lifting lug.

[0018] The first locking hook and the second locking hook are both connected by a seventh wire rope loop;

[0019] The two main hooks of the floating cranes on the sea side are connected and locked together by an eighth wire rope ring.

[0020] Preferably, both lifting beams on the main hook of the floating crane on the land side are 800t lifting beams;

[0021] The opening between the second wire rope loops is opened by the lifting beam, avoiding the rear beam of the bridge grab unloader, so that the third wire rope loop passes through the gap between the rear beam and the column and connects to the corresponding lifting lug.

[0022] The opening between the fourth wire rope rings is controlled by the eighth wire rope ring to avoid the large diagonal brace on the door frame, so that the sixth wire rope ring passes through the inside of the large diagonal brace and connects to the corresponding hoisting lug.

[0023] The opening between the second wire rope ring and the fifth wire rope ring is controlled by the first locking hook, the second locking hook, and the seventh wire rope ring, thus avoiding the machine room of the bridge grab unloader.

[0024] Preferably, the lifting lugs are provided in four sets, symmetrically arranged in pairs at the connection between the sea-side column and the connecting beam on the upper part of the door frame, and at the connection between the land-side column and the connecting beam on the upper part of the door frame.

[0025] The lifting lugs have a four-hole structure.

[0026] This invention provides a three-hook lateral hoisting method for a bridge-type grab unloader based on a four-main-hook floating crane. For the first time, a four-main-hook floating crane is used, positioned at a 45° angle from the side of the equipment, and cleverly utilizes three of the main hooks to achieve the complete hoisting of the bridge-type grab unloader. This invention not only effectively improves the adaptability and safety of hoisting operations, significantly shortens the installation cycle, reduces on-site assembly and welding work, and minimizes interference with dock operations, but also takes into account the requirements of overall structural integrity, demonstrating outstanding superiority, innovation, and novelty. Attached Figure Description

[0027] Figure 1 This is a structural schematic diagram of an existing bridge-type grab unloader;

[0028] Figure 2 This is a schematic diagram of the arrangement of the floating crane boom in the three-hook lateral hoisting method of the bridge grab unloader of the present invention;

[0029] Figure 3 This is a schematic diagram of the arrangement of the main hook of the floating crane in the three-hook lateral hoisting method of the bridge grab unloader of the present invention;

[0030] Figure 4 This is a schematic diagram of the arrangement of rigging and anti-interference mechanisms in the three-hook lateral hoisting method for the bridge grab unloader of the present invention.

[0031] Figure 5 yes Figure 4 Enlarged views of positions I and II, (a) is an enlarged view of position I, and (b) is an enlarged view of position II;

[0032] Figure 6 This is a schematic diagram of the hoisting of the main hook of the land-side floating crane in the three-hook lateral hoisting method of the bridge grab unloader of the present invention;

[0033] Figure 7This is a schematic diagram of the hoisting of the main hook of the floating crane on the sea side in the three-hook lateral hoisting method of the bridge grab unloader of the present invention;

[0034] Figure 8 yes Figure 6 A schematic diagram of the CC direction;

[0035] Figure 9 This is a schematic diagram of the arrangement of the locking hook and the fourth wire rope in the three-hook lateral hoisting method of the bridge grab unloader of the present invention.

[0036] Figure 10 This is a schematic diagram of the lifting lugs in the three-hook lateral hoisting method for the bridge grab unloader of the present invention;

[0037] Figure 11 This is a schematic diagram of the arrangement of the lifting lugs in the three-hook lateral hoisting method of the bridge grab unloader of the present invention. Detailed Implementation

[0038] To better understand the above-mentioned technical solutions of the present invention, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0039] This invention provides a three-hook lateral hoisting method for a bridge grab unloader based on a four-main-hook floating crane. Based on the precise calculation of the whole machine's center of gravity, the arrangement of the hoisting lugs, the asymmetrical arrangement of the four floating crane main hooks, the selection of special wire rope slings and lifting beams, and the design of locking hook tooling to avoid structural interference, the method ultimately guides the floating crane boom 100 to hoist the bridge grab unloader 300 onto the shore at an angle of approximately 45° to the shoreline of the wharf 200, thereby achieving safe and efficient hoisting of the unloader.

[0040] Combination Figure 2 As shown, the floating crane boom 100 forms an acute angle (45°±1°) with the shoreline of the wharf 200, and the whole machine is lifted from the side of the bridge grab unloader 300, which effectively avoids structural interference between the front beam assembly of the bridge grab unloader 300 and the floating crane boom 100.

[0041] Combination Figure 3 As shown, the four main hooks on the floating crane boom 300 are arranged asymmetrically, utilizing three main hooks to work together. Specifically, one main hook 101 is selected on the land side, and two main hooks 102 are selected on the sea side. The two main hooks 102 on the sea side and one main hook 101 on the land side are arranged at a 45° angle to form an equilateral triangle, ensuring the overall balance of the bridge grab unloader 300 during the lifting process.

[0042] Combination Figure 4 and Figure 5As shown, the main hooks of the floating cranes are equipped with rigging and anti-interference mechanisms. Based on the center of gravity and weight of the entire crane, and considering the position of the center of gravity and the distributed load, appropriate lifting wire ropes, shackles, lifting beams, and locking hooks are selected through force analysis. On the land side, two 800-ton lifting beams 103 are used to open the second wire rope loop 105 to avoid the rear beam; on the sea side, an eighth wire rope loop 114 is used to lock the two main hooks 102 to avoid the large diagonal bracing of the portal frame. The locking hooks are used to control the opening of the wire rope loops on both the land and sea sides to avoid the machine room 304, thus achieving structural interference avoidance. Specifically:

[0043] Two first wire rope loops 104 are configured on both ends of a floating crane main hook 101 on the land side. The first wire rope loops 104 on the same side of both ends are connected to the lifting beam 103, so that the lifting beam 103 is set in a horizontal direction. A second wire rope loop 105 and a third wire rope loop 106 are connected to both ends of each lifting beam 103 in sequence. The second wire rope loop 105 and the third wire rope loop 106 are connected by a first locking hook device 107. The third wire rope loop 106 is connected to the corresponding lifting lug 400.

[0044] The 800-ton lifting beam 103 is used to open the gap between the two second wire rope loops 105, respectively avoiding the rear beam 301 of the bridge grab unloader 300, so that the third wire rope loop 106 can pass through the gap between the rear beam 301 and the column 302 and connect to the corresponding lifting lug 400. Figure 6 As shown.

[0045] On the two floating crane main hooks 102 on the sea side, a fourth wire rope ring 108, a fifth wire rope ring 109, and a sixth wire rope ring 110 are connected in sequence. The fourth wire rope ring 108 and the fifth wire rope ring 109 are connected by a shackle 111, and the fifth wire rope ring 109 and the sixth wire rope ring 110 are connected by a second locking hook 112. The sixth wire rope ring 110 is connected to the corresponding lifting lug 400.

[0046] The two floating crane main hooks 102 on the sea side are connected and locked by an eighth wire rope ring 114 to control the opening between the corresponding wire rope rings on the two floating crane main hooks 102, avoiding the large diagonal brace 303 on the portal frame, so that the sixth wire rope ring 110 passes through the inside of the large diagonal brace 303 and connects to the corresponding lifting lug 400. Figure 7 and Figure 8 As shown.

[0047] The first locking hook 107 and the second locking hook 112 are both connected by a seventh wire rope ring 113. The opening between the second wire rope ring 105 and the fifth wire rope ring 109 is controlled by the first locking hook 107, the second locking hook 112, and the seventh wire rope ring 113, avoiding the machine room 304 of the bridge grab unloader 300, allowing the second wire rope ring 105 and the fifth wire rope ring 109 to pass through the inside of the door frame. Figure 9 As shown.

[0048] The locking hook and the wire rope ring are connected by a pin shaft; the wire rope ring and the lifting lug 400 are connected by a shackle.

[0049] Combination Figure 10 and Figure 11 As shown, firstly, the center of gravity of the bridge grab unloader 300 is accurately calculated. Based on this center of gravity, four sets of lifting lugs 400 are symmetrically set at the connection between the sea-side column 305 and the connecting beam 306 on the upper part of the gate frame, and at the connection between the land-side column 307 and the connecting beam 306 on the upper part of the gate frame. Each set of lifting lugs 400 has a four-hole structure, which ensures the rationality of load distribution and the safety of structural stress during lifting.

[0050] In summary, this invention, through its innovative lifting point arrangement, lifting tool design, and lateral lifting process, successfully overcomes the site limitations that require floating cranes to be lifted from the front. This method is scientific and reliable, and is particularly suitable for the efficient and economical installation and relocation of large port machinery in complex and narrow port waters.

[0051] Example

[0052] Combined Figure 2 and Figure 3 As shown, this embodiment provides a three-hook lateral hoisting method for a bridge grab unloader based on a four-main-hook floating crane. A 5000T four-main-hook floating crane is used, utilizing one main hook 101 on the land side and two main hooks 102 on the sea side, for a total of three main hooks for hoisting. Each main hook has a rated lifting capacity of 1250T. The floating crane is pre-configured according to the wire rope rigging diagram, with the wire rope hooks in place. The floating crane boom 100 is moved to the side of the bridge grab unloader 300 at a 45° angle, and the wire rope rigging is inserted into the assembly lifting lug using shackles.

[0053] After the bridge grab unloader 300 is slowly lifted and moved, the floating crane boom 100 is moved laterally towards the dock 200 and crosses the height of the belt conveyor corridor, and then slowly lowered onto the rails to complete the hoisting of the entire machine.

[0054] Those skilled in the art should recognize that the above embodiments are merely illustrative of the present invention and are not intended to limit the present invention. Any variations or modifications to the above embodiments that are within the spirit and essence of the present invention will fall within the scope of the claims of the present invention.

Claims

1. A method for lateral hoisting of a bridge-type grab unloader based on a four-main-hook floating crane, characterized in that: The floating crane boom forms an acute angle with the shoreline of the wharf, allowing the entire machine to be lifted from the side of the bridge grab unloader; The floating crane boom has multiple main hooks in an asymmetrical configuration, with an odd number of main hooks on the land side and an even number on the sea side. Each of the floating crane's main hooks is equipped with rigging tools and anti-interference mechanisms; Lifting lugs are installed at the connection between the column and the connecting beam on the upper part of the gate frame of the bridge grab unloader.

2. The method for side hoisting of a bridge grab unloader based on a four-main-hook floating crane according to claim 1, characterized in that: The acute angle between the floating crane boom and the shoreline of the wharf is 45°±1°.

3. The method for side-lifting the entire bridge grab unloader based on a four-main-hook floating crane according to claim 1, characterized in that: The floating crane has four main hooks; The floating crane on the land side uses one main hook, which corresponds to the two lifting lugs on the bridge grab unloader. Two main hooks are used on the sea side of the floating crane, and each main hook corresponds to one of the lifting lugs on the bridge grab unloader.

4. The method for side-lifting the entire bridge grab unloader based on a four-main-hook floating crane according to claim 3, characterized in that, The main hook of each floating crane is equipped with rigging and anti-interference mechanisms, specifically including: On the land side, a first wire rope loop is provided on both ends of the main hook of the floating crane. The first wire rope loops on the same side of both ends are connected to the lifting beam, so that the lifting beam is set in the horizontal direction. A second wire rope loop and a third wire rope loop are connected to both ends of each lifting beam in sequence. The second wire rope loop and the third wire rope loop are connected by a first locking hook device. The third wire rope loop is connected to the corresponding lifting lug. On the two main hooks of the floating cranes on the sea side, a fourth wire rope ring, a fifth wire rope ring, and a sixth wire rope ring are connected in sequence. The fourth wire rope ring and the fifth wire rope ring are connected by a shackle, and the fifth wire rope ring and the sixth wire rope ring are connected by a second locking hook. The sixth wire rope ring is connected to the corresponding lifting lug. The first locking hook and the second locking hook are both connected by a seventh wire rope loop; The two main hooks of the floating cranes on the sea side are connected and locked together by an eighth wire rope ring.

5. The method for side hoisting of a bridge grab unloader based on a four-main-hook floating crane according to claim 4, characterized in that: Both of the lifting beams on the main hook of the floating crane on the land side are 800t lifting beams; The opening between the second wire rope loops is opened by the lifting beam, avoiding the rear beam of the bridge grab unloader, so that the third wire rope loop passes through the gap between the rear beam and the column and connects to the corresponding lifting lug. The opening between the fourth wire rope rings is controlled by the eighth wire rope ring to avoid the large diagonal brace on the door frame, so that the sixth wire rope ring passes through the inside of the large diagonal brace and connects to the corresponding hoisting lug. The opening between the second wire rope ring and the fifth wire rope ring is controlled by the first locking hook, the second locking hook, and the seventh wire rope ring, thus avoiding the machine room of the bridge grab unloader.

6. The method for side-lifting the entire bridge grab unloader based on a four-main-hook floating crane according to claim 1, characterized in that: The hoisting lugs are provided in four sets, symmetrically arranged in pairs at the connection between the sea-side column and the connecting beam on the upper part of the door frame, and at the connection between the land-side column and the connecting beam on the upper part of the door frame. The lifting lugs have a four-hole structure.

Images