CN117622410A - Cabin body weak position reinforcing assembly and cabin large opening total section hoisting method - Google Patents

Abstract

The invention relates to the technical field of cabin hoisting and provides a cabin weak position reinforcing assembly, which comprises a support piece, wherein a welding spot piece is arranged on the support piece; the welding point piece comprises a stud; two ends of the stud penetrate out of the supporting piece, one end of the stud is fixedly connected with the bonding pad, and the other end of the stud is in threaded connection with the nut. Therefore, welding spots are formed through the welding pads and the connecting positions; when the welding piece is recovered, the welding pad is only required to be disassembled, ground flat and re-assembled on the supporting piece, and the welding piece can be reused. In the welding spot forming process, the material of the supporting piece is not melted, the material can be recycled repeatedly, the service life is prolonged, and the cost is reduced. The invention also provides a cabin large-opening total section hoisting method, which comprises the steps of constructing a mechanical model according to the principle of mass unit distribution, finding out the weak section position and carrying out hoisting point design. The hoisting scheme is optimized, the number of reinforcing appliances is obviously reduced, the shipbuilding cost is reduced, and meanwhile, the construction risk in the coordination operation of multiple persons is reduced.

Description

Cabin body weak position reinforcing assembly and cabin large opening total section hoisting method

Technical Field

The invention belongs to the technical field of cabin body hoisting, and particularly relates to a cabin body weak position reinforcing assembly and a cabin large opening total section hoisting method.

Background

Lifting operation is needed in the ship construction process. Before the hoisting operation, the weak position needs to be reinforced, so that deformation in the hoisting process is avoided.

The reinforcement method commonly used at present uses sections such as square tubes as supporting tools, and builds and supports at the reinforcement part. And the joint positions among the supporting devices and the contact positions of the supporting pieces and the ship body are welded and fixed to form an integral structure, so that the strength is enhanced. After the hoisting operation is completed, the welding spots are cut off, and the supporting device is recovered. Because during welding, the metal of the supporting device can be melted to participate in the forming of the welding spot joint, the wall thickness can be reduced due to cutting recovery, and the strength is reduced. And meanwhile, the strength of the heat affected zone part close to the welding spot is low. After being recovered for several times, the supporting device cannot meet the use requirement and needs to be replaced, so that certain waste is caused.

Currently, in the process of ship construction, large-scale headblocks exist in certain special structural forms. Such as: in order to reserve the host installation position, a large opening is reserved in the middle part of the deck surface. The structure belongs to a section coefficient abrupt change structure from the mechanical angle analysis.

The existing hoisting scheme generally regards a total section as a whole, and calculates the weight center of gravity of the whole after the total section group according to the principle of moment balance, namely the weight center of gravity of the whole after the total section group comprises the combination of each sectional structure, welding materials, paint, outfitting pieces, pipe systems, electric equipment, mechanical equipment and the like. And then carrying out a hoisting scheme and a reinforcing design, and carrying out hoisting operation after finishing the arrangement of the lifting lugs. This results in a high amount of reinforcement equipment for a single block, with the risk of interference with outfitting with various equipment units on the underlying platform. Once interference occurs, the working procedure is moved backwards, the construction efficiency is affected, and the construction period is prolonged.

In summary, it is clear that the prior art has inconvenience and defects in practical use, so that improvement is needed.

Disclosure of Invention

Aiming at the defects, the invention mainly provides a reinforcing component for the weak position of a cabin body, which solves the technical problem that the number of times of recycling of a supporting piece is small.

In order to solve the problems, the invention provides a cabin weak position reinforcing assembly, which comprises a support piece, wherein a welding spot piece is arranged on the support piece; the welding point piece comprises a stud; two ends of the stud penetrate out of the supporting piece, one end of the stud is fixedly connected with the bonding pad, and the other end of the stud is in threaded connection with the nut.

According to the cabin weak position reinforcing component, the supporting piece is in a strip shape and is made of square tubes, round tubes or channel steel.

According to the cabin weak position reinforcing assembly, at least three welding point pieces are arranged on the supporting piece.

According to the cabin weak position reinforcing component, a plurality of groups of through holes for installing welding point pieces are formed in the supporting piece.

According to the reinforcing component for the weak position of the cabin body, two ends of the supporting piece are fixedly connected with a cover plate respectively, and the welding point piece is arranged on the cover plate in a penetrating mode.

According to the reinforcing component for the weak position of the cabin body, the welding plate is fixedly provided with the welding material layer, and the welding material layer is a metal plate.

According to the cabin weak position reinforcing component, a clamping block is arranged at the center of the solder layer; and the bonding pad is correspondingly provided with a clamping hole connected with the clamping block.

According to the cabin weak point reinforcing assembly of the invention, the pad between the pad and the support member.

A cabin large-opening total section hoisting method comprises the following steps:

s1, analyzing the structure and weight distribution of a cabin, constructing a mechanical model, and finding out the position of a weak section on the cabin;

s2, constructing a supporting structure by using a plurality of reinforcing assemblies, and additionally installing and fixing the reinforcing assemblies on the weak section of the cabin body to reinforce the cabin body;

s3, designing positions and number of lifting points, and determining lifting equipment and lifting schemes;

s4, after the hoisting scheme is determined, interference inspection is carried out; repeating S3 if the interference problem exists until the interference problem is eliminated;

s5, after the hoisting scheme is determined, finite element calculation is carried out, and whether structural stress response of each area of the cabin body meets the specification requirement is verified; if the requirements are not met, repeating the steps S1-S3 until the requirements are met;

s6, starting the hoisting equipment to carry out hoisting operation.

According to the cabin large-opening total section hoisting method, the hoisting equipment is a gantry crane.

In summary, the welding spots are formed through the welding pads and the connecting positions; when the welding piece is recovered, the welding pad is only required to be disassembled, ground flat and re-assembled on the supporting piece, and the welding piece can be reused. In the welding spot forming process, the material of the supporting piece is not melted, the material can be recycled repeatedly, the service life is prolonged, and the cost is reduced. The invention also provides a cabin large-opening total section hoisting method, which comprises the steps of constructing a mechanical model according to the principle of mass unit distribution, finding out the weak section position and carrying out hoisting point design. The hoisting scheme is optimized, the number of reinforcing appliances is obviously reduced, the shipbuilding cost is reduced, and meanwhile, the construction risk in the coordination operation of multiple persons is reduced.

Drawings

FIG. 1 is a schematic structural view of the reinforcement assembly of the present invention;

FIG. 2 is a schematic view of the structure in the direction A in FIG. 1;

FIG. 3 is a schematic view of the structure of the region B in FIG. 1;

FIG. 4 is a schematic view of the structure of the region C in FIG. 3;

FIG. 5 is a schematic view of the distribution of the positions of the hanging points in the hanging method of the present invention;

FIG. 6 is a schematic view of the structure in the direction D in FIG. 5;

in the figure: 1-supporting piece, 11-through holes and 12-cover plate; 2-bonding pads, 21-studs, 22-nuts, 23-solder layers and 231-clamping blocks; 24-a gasket; 3-cabin body, 31-hanging piece.

Detailed Description

Referring to fig. 1, the invention provides a cabin weak position reinforcing assembly, which comprises a support piece 1, wherein a welding point piece is arranged on the support piece 1; referring to fig. 3, the welding member includes a stud 21; two ends of the stud 21 penetrate out of the support piece 1, one end of the stud is fixedly connected with the bonding pad 2, and the other end of the stud is in threaded connection with the nut 22;

the support 1 of the present invention is long, and is preferably made of square tubes, round tubes or channel steel.

At least three welding point pieces are arranged on the support piece 1 so as to be convenient for building and connecting.

Referring to fig. 6, when a plurality of support members 1 are used to construct a support structure, bonding pads 2 of two support members 1 are welded at the joint position to form bonding points, thereby completing the fixation.

Similarly, when the support member 1 is required to be attached to the bulkhead, the bonding pads 2 of the support member 1 can be attached to the bulkhead, and then each bonding pad 2 can be welded to the bulkhead to form a plurality of welding spots.

During recovery, the weld is severed and the support 1 is withdrawn. The bonding pad 2 and the stud 21 are detached, the bonding pad 2 is ground flat, and the bonding pad is reinstalled on the support 1 for the next use. If the melting of the bonding pad is serious, the bonding pad 2 and the stud 21 can be scrapped and replaced. Compared with the replacement supporting device in the prior art, the cost is greatly reduced.

According to the reinforcing component, in the forming process of welding spots, the material of the supporting piece 1 is not melted, the reinforcing component can be recycled repeatedly, the service life is prolonged, and the cost is reduced.

As an embodiment, the welding spot piece can be made of bolts and nuts with proper specifications, so that the welding spot piece is convenient to purchase and replace.

Referring to fig. 2, the supporting member 1 is provided with a plurality of sets of through holes 11 for installing welding point members, so that the positions of the welding point members can be set according to the actual needs of the supporting structure.

As an embodiment, two ends of the supporting member 1 are fixedly connected with a cover plate 12 respectively, and the welding point member is arranged on the cover plate 12 in a penetrating manner; when the support 1 is used as a vertical support, the welding pieces on the both end cover plates 12 are used to form welding points.

In connection with fig. 4, it is desirable to facilitate the recovery of the solder joint members while facilitating the formation of a robust solder joint. The welding material layer 23 is fixedly arranged on the welding plate 2; the solder layer 23 of the present invention is a metal plate containing nickel or copper, and after welding, a high quality structure is formed in the welding spot to improve the strength of the welding spot.

Preferably, a clamping block 231 is arranged at the center of the solder layer 23; the bonding pad 2 is correspondingly provided with a clamping hole connected with the clamping block 231;

the clamping block 231 and the clamping hole can be in interference fit, and when the welding device is installed, the welding material layer 23 is hit by using external force, and the clamping block 231 is pressed into the clamping hole to form fixed connection.

Further, in order to increase the strength of the connection between the solder joint member and the support member 1, the stud 21 of the present invention is also sleeved with a spacer 24 between the pad 2 and the support member 1.

Referring to fig. 5, the invention also provides a method for hoisting the large-opening total section of the engine room, which comprises the following steps:

s1, analyzing the structure and weight distribution of the cabin body 3, constructing a mechanical model, and finding out the position of a weak section on the cabin body 3;

the invention divides the port and starboard of the cabin 3 into two mass units. The theoretical weakest cross-sectional position is found according to the structure of the two mass units and the middle opening. And (3) analyzing by simplifying the mechanical model into a dumbbell rod, and finding out the position of the weak section.

For example: the port and starboard structure of the cabin 3 is provided with outer plates, and the equipment is densely distributed. While the length of the opening in the middle of the cabin 3 is about 1/5 of the full width. The length of the dumbbell rod is smaller, so that the dumbbell rod can be simplified into a short and thick dumbbell rod model with two heavy ends and a short middle part.

From the analysis it is concluded that: the smallest section modulus at the middle of the "dumbbell bar" is also most prone to structural failure here. In order to make the model theoretically stable in structure and small in deformation amount in the middle, the force needs to be applied to two sides and reinforced to achieve the whole balance state.

S2, constructing a supporting structure by using a plurality of reinforcement assemblies, and additionally installing and fixing the reinforcing assemblies on the weak section of the cabin body 3 to reinforce the cabin body;

the invention adopts a plurality of reinforcing components, and referring to the structure shown in fig. 6, the reinforcing components are built and welded and fixed at the joint positions to form a supporting structure. The reinforcing component close to the cabin body 3 can be welded on the cabin body 3, so that the integral strength is formed, and deformation in the subsequent hoisting operation process is avoided.

S3, designing positions and number of lifting points, and determining lifting equipment and lifting schemes;

referring to fig. 5, the number and positions of the hanging points are determined according to the analysis conclusion. And a hanging member 31 is installed on the cabin 3.

S4, after the hoisting scheme is determined, interference inspection is carried out; repeating S3 if the interference problem exists until the interference problem is eliminated;

according to professional equipment such as ships, machines, electricity and the like in the cabin area, a pipe system and a line. And carrying out interference check by using related software, and mainly checking outfitting equipment of the lower-layer platform to check whether the hoisting scheme has interference condition.

S5, after the hoisting scheme is determined, finite element calculation is carried out, and whether the structural stress response of each region of the cabin body 3 meets the specification requirement is verified; if the requirements are not met, repeating the steps S1-S3 until the requirements are met;

s6, starting the hoisting equipment to carry out hoisting operation.

As one implementation mode, the hoisting method is adopted for hoisting operation, and the hoisting sequence is that after the middle cabin section assembly forms a total section, after the bottom cabin bottom total section of the bottom cabin is folded in place, the middle cabin total section is hoisted.

Preferably, the lifting device is a gantry crane. The hanging points are three groups. Further, the hanger 31 is arranged near the intersection of the outer panel and the nacelle front wall cross-bar structure.

And (3) hanging point arrangement design: the suspension points are arranged on the platform of the nacelle 3 on the basis of dividing the nacelle section into two mass units. Two groups of upper trolleys and one group of lower trolleys of the gantry crane are arranged separately, wherein the two groups of upper trolleys are symmetrically distributed about the main girder of the crane, and the length direction of the lower trolleys is along the ship length direction, so that two mass units are wrapped as much as possible.

As a preferred arrangement principle: the principle of center of gravity coincidence, namely that the connecting line center of two upper trolleys is positioned at the center of a port side mass unit, and the center of a lower trolley hanging component 31 is positioned at the center of a starboard side mass unit, so that the left and right mass units are in a balanced state, and the internal force of the middle weak part is reduced. In view of the theoretical weakest cross-sectional position, the support 1 is used to provide reinforcement in the lateral lower mouth and, if necessary, in the diagonal and vertical direction at the mid-rib position.

As a preferred arrangement principle: the principle of priority of structural strength is that the centers of connecting lines of two upper trolleys are close to the front wall of a port cabin and the intersection of a curved outer plate and a deck, the center of a lower trolley hanging component 31 is positioned at the intersection of a starboard deck and the curved outer plate, and the centers of the two positions are far away from a large opening of a main pit. Only at the lower side of the tail gate is a lateral reinforcement provided with the support 1.

According to the hoisting method, the weight distribution of the structure is primarily analyzed in combination with the structural form, the mechanical model of the short and thick dumbbell rod is simplified according to the principle of the distribution of the mass units, the position of the section which is the weakest in theory is found out, and the principle of the arrangement of hoisting points is provided; the total section reinforcing material is saved, the labor cost is saved, the shipbuilding cost is reduced, and meanwhile, the construction risk in the coordinated operation of multiple persons is reduced; meanwhile, the condition of interference between hoisting reinforcement and lower-layer platform outfitting and equipment can be effectively avoided, and the hoisting efficiency of a crane is further improved.

In summary, the invention provides a cabin weak position reinforcing component, which forms welding spots with a connecting position through a welding pad; when the welding piece is recovered, the welding pad is only required to be disassembled, ground flat and re-assembled on the supporting piece, and the welding piece can be reused. In the welding spot forming process, the material of the supporting piece is not melted, the material can be recycled repeatedly, the service life is prolonged, and the cost is reduced. The invention also provides a cabin large-opening total section hoisting method, which comprises the steps of constructing a mechanical model according to the principle of mass unit distribution, finding out the weak section position and carrying out hoisting point design. The hoisting scheme is optimized, the number of reinforcing appliances is obviously reduced, the shipbuilding cost is reduced, and meanwhile, the construction risk in the coordination operation of multiple persons is reduced.

Of course, the present invention is capable of other various embodiments and its several details are capable of modification and variation in light of the present invention, as will be apparent to those skilled in the art, without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (10)

1. The cabin weak position reinforcing assembly is characterized by comprising a supporting piece, wherein a welding spot piece is arranged on the supporting piece; the welding point piece comprises a stud; two ends of the stud penetrate out of the supporting piece, one end of the stud is fixedly connected with the bonding pad, and the other end of the stud is in threaded connection with the nut.

2. The tank weak point reinforcing assembly according to claim 1, wherein the support member is in the form of a strip made of square tubes, round tubes or channel steel.

3. The tank weak point reinforcing assembly according to claim 1, wherein at least three welding points are provided on the support member.

4. The tank weak point reinforcing assembly according to claim 1, wherein the support member is provided with a plurality of sets of through holes for mounting the solder joint members.

5. The compartment weakening stiffening assembly of claim 1, wherein said support members are fixedly attached to respective cover plates, said cover plates being provided with said weld members.

6. The tank weak point reinforcing assembly according to claim 1, wherein a solder layer is fixedly arranged on the bonding pad, and the solder layer is a metal plate.

7. The tank weak point reinforcing assembly according to claim 6, wherein a clamping block is arranged at the center of the solder layer; and the bonding pad is correspondingly provided with a clamping hole connected with the clamping block.

8. The tank weakpoint reinforcement assembly of claim 1, wherein a gasket is interposed between the pad and the support.

9. The cabin large-opening total section hoisting method is characterized by comprising the following steps of:

s1, analyzing the structure and weight distribution of a cabin, constructing a mechanical model, and finding out the position of a weak section on the cabin;

s2, constructing a supporting structure by using a plurality of reinforcing assemblies according to any one of claims 1 to 8, and additionally installing and fixing the reinforcing assemblies on the weak section of the cabin body to reinforce the cabin body;

s3, designing positions and number of lifting points, and determining lifting equipment and lifting schemes;

s4, after the hoisting scheme is determined, interference inspection is carried out; repeating S3 if the interference problem exists until the interference problem is eliminated;

s5, after the hoisting scheme is determined, finite element calculation is carried out, and whether structural stress response of each area of the cabin body meets the specification requirement is verified; if the requirements are not met, repeating the steps S1-S3 until the requirements are met;

s6, starting the hoisting equipment to carry out hoisting operation.

10. The method for hoisting a large-opening block of a nacelle according to claim 9, wherein the hoisting equipment is a gantry crane.