CN111959709A - Assembled oil tank and manufacturing process thereof - Google Patents

Abstract

The invention relates to an assembled oil tank and a manufacturing process thereof, which are an installation form of a cubic oil tank of a ship. The process comprises the steps of prefabricating each board surface in a peripheral field, and treating each connecting edge of the board surface after prefabrication is finished, wherein the treatment mode mainly comprises the following steps: the inner and outer angle steels are prefabricated and welded into a groove type and a comb tenon cross connection type. The oil tank is assembled with each panel through hoisting during installation, and is connected through the prefabricated mode of face, makes each face have a preliminary steady ability of oneself after assembling, and the rethread shaped steel is consolidated and is made its intensity that reaches the designing requirement. The process method can quickly finish the manufacturing and installation of the oil tank to achieve the expected target, and has short construction period, low cost and obvious economic benefit.

Description

Assembled oil tank and manufacturing process thereof

Technical Field

The invention relates to an assembly process technology of a cubic container for manufacturing a ship oil tank or similar to the structure of the ship oil tank, in particular to an assembled oil tank and a manufacturing process thereof.

Background

With the rapid development of the navigation industry in China, the ship manufacturing is continuously advanced towards high quality and high efficiency. Therefore, there is also a demand for high efficiency and high quality in the manufacture of oil tanks for ships. The ship oil tank is a double-layer cubic container which is made of carbon steel plates with the thickness of 15-25mm, and the length, width and height of the shape of the double-layer cubic container are not more than 10 meters. In the traditional manufacturing and installation work, the construction is mostly carried out by adopting a field assembling and welding mode, the construction platform needs to be built around the oil tank layer by layer in the manufacturing mode, and the steel plates are welded in blocks to form the integral deck plate. The defects of the assembly form are as follows: firstly, the requirements on the conditions of a construction site are high, and the construction can be started only when the conditions are met on the site; secondly, the number of supports and auxiliary facilities is large, and the requirement on the operation space is large. And thirdly, the oil tank wall plates are assembled according to blocks, so that the included angle precision of two adjacent connected wall plates is difficult to control, and the deformation of the whole formed oil tank wall plates is caused. And fourthly, the influence of the site construction environment and the operation height causes inconvenience in welding and assembling operation, and the conditions of high construction cost, low efficiency and the like caused by prolonged construction period are caused. The traditional form of fabrication is an urgent need for improvement and promotion for high-speed development shipbuilding.

In view of the above-mentioned related circumstances of manufacturing the oil tank of the ship, there is a need for a method which simplifies the process, has controllable quality, ensures the quality, shortens the construction period, reduces the cost, solves the disadvantages of the above-mentioned manufacturing and installation method, breaks through the installation construction technology of the traditional on-site welding manufacturing method, and shortens the construction period while ensuring the quality of the manufacturing work, and reduces the cost.

Disclosure of Invention

The invention provides a manufacturing process of an assembled oil tank, which breaks through the traditional on-site assembling and welding method by improving the construction process and the construction mode, adopts the steps of prefabricating each plate surface on the peripheral site, processing the plate surface connecting joints, hoisting the plate surfaces to the installation site for assembling, reduces measures in construction and improves the construction quality of each plate surface while avoiding the requirement of construction conditions for on-site assembling. Finally, the purposes of quality assurance, construction period shortening and cost reduction are achieved, and obvious economic benefits are achieved.

According to an embodiment of the present invention, there is provided a fabricated cargo tank manufacturing process, including:

1. prefabricated oil tank panel

The oil tank is decomposed into an inner tank plate and an outer tank plate, the inner tank plate comprises an inner tank bottom plate, an inner tank wall plate and an inner tank top plate, the outer tank plate comprises an outer tank bottom plate, an outer tank wall plate and an outer tank top plate, each inner tank plate and each outer tank plate are prefabricated (sequentially or simultaneously), firstly, a reasonable installation prefabricating site is selected (prefabricating land meets the requirements of being close to the installation position of the oil tank, being smooth in the earth surface and being beneficial to other prefabricating work such as welding and protection), a welding construction environment is set, and a whole panel is prefabricated to serve as one of the tank plates; after prefabrication, processing each connecting edge of each deck plate surface in a processing mode that: inner and outer angle steels are welded at the connecting edges between an inner cabin bottom plate and an inner cabin wall plate, an inner cabin top plate and an inner cabin wall plate, an outer cabin bottom plate and an outer cabin wall plate, and the connecting edges between the outer cabin top plate and the outer cabin wall plate are prefabricated into a groove type and a connecting edge between the inner cabin wall plate and the inner cabin wall plate, and the outer cabin wall plate are prefabricated into a comb tooth tenon cross connection type, and the connecting positions of two adjacent side plate surfaces need to be accurately lofted in the prefabricating process, so that errors in assembling are reduced;

and further, prefabrication comprises the steps of measuring and lofting steel plates for forming each cabin plate, assembling blanking groups, reinforcing the plate surface and welding seams, and welding and aligning according to the requirements of design files. In one embodiment, a plate surface of the oil tank is 8.8 meters multiplied by 8.8 meters in size, small steel plates are used for splicing, the splicing of the small steel plates needs to be measured in advance, how to splice the small steel plates is arranged, after the splicing mode is determined, assembly welding needs to be carried out on spliced seams, in order to enable the whole deformation of the plate surface to be small in the welding process, a heavy pressing method needs to be adopted for fixing, the welding seams are guaranteed not to deform, and the whole plate surface is smooth.

2. Oil tank panel assembling reinforcement

When the oil tank is installed (for example, by hoisting), assembling each panel, and assembling and connecting each inner tank board and each outer tank board of the oil tank in a way of prefabricating the board surface;

the method comprises the following steps of firstly, connecting an inner cabin bottom plate and an inner cabin wall plate, an inner cabin top plate and an inner cabin wall plate, connecting an outer cabin bottom plate and an outer cabin wall plate, and connecting the outer cabin bottom plate and the outer cabin wall plate in a groove type connection mode through inner and outer angle steels, realizing vertical assembly of two plate surfaces, performing welding and alignment after the assembly is completed, and finally performing fine adjustment, reinforcement and full welding (welding). The fine adjustment comprises tightly connecting the joint of the plate surfaces without gaps, fixing the plate surfaces by spot welding, and determining the regular overall shape, i.e. starting full welding to form the finished oil tank.

Secondly, the inner cabin wall plate and the inner cabin wall plate are connected with the outer cabin wall plate in a comb tenon crossing mode, when the inner cabin wall plate and the outer cabin wall plate are assembled, the comb tenons of the adjacent plate surfaces are used for cross connection, the crossing length of the inner cabin wall plate should exceed the plate surface crossing distance (for example, 500-1000mm, namely the distance between an inner cabin of an oil cabin and an interlayer of the outer cabin) so as to be used for supporting the outer cabin wall plate, then fillet weld is carried out on inner corners of crossing corners, opposite corners of the inner corners are welded through reinforcing angle steel, and the assembly of the inner cabin wall plate is completed; the crossing length of the outer cabin wall plates is the same as the crossed plate thickness, and then fine adjustment, reinforcement and full welding (welding) are carried out.

Further, inside and outside angle steel becomes the slot type and is adopted two angle steel (inside lining angle steel and outside angle steel) of variation in size to fix respectively (for example use the welded mode) on medial surface and the lateral surface of a face connection limit, inside lining angle steel and outside angle steel are parallel to each other, distance between inside lining angle steel and the outside angle steel is the thickness of face, two angle steel form the duplex angle steel slot of a perpendicular to face with a face welded fastening back, the perpendicular fixed connection of two faces can be realized to the face that another needs to connect inserts the duplex angle steel slot.

In one embodiment, the lining angle steel is 5# angle steel with the same length as the wall plate, the outer lining angle steel is 10# angle steel with the same length as the wall plate, and the length is the same as the plate because the angle steel is used for connecting the whole edge of the plate surface.

Further, the comb-tenon cross-connecting type is to cut the connecting edges of the board surfaces (for example, using a steel plate cutting machine) into cross-slits which are staggered with each other, and to vertically tenon-join the two board surfaces to be assembled.

The width of the cross-over seams of the inner deck walls may be, for example, 2-3cm, and the depth of the cross-over needs to be determined according to the distance between the inner and outer deck panels, since the depth of the cross-over of the inner deck needs to be used as a support for the outer deck panels, see fig. 8 or fig. 10, and the distance between adjacent cross-over seams may be 4-6 cm.

The width of the cross seam of the outer cabin wall plate is 2-3cm, the cross depth is consistent with the thickness of the steel plate, and the cross seam does not exceed the plate surface after crossing, as shown in figure 11. The distance between adjacent cross seams may be 4-6 cm.

Further, the inner cabin wallboard includes an inner cabin bottom plate, four inner cabin wallboards, an inner cabin roof, and the outer cabin wallboard includes an outer cabin bottom plate, four outer cabin wallboards, an outer cabin roof, and in the assembling process, the assembling order of each inner cabin wallboard (between bottom plate and wallboard, between wallboard and roof) is: the bottom plate is assembled, then the wall plate is assembled, and finally the top plate is installed. The assembly sequence of the outer cabin plate is as follows: the bottom plate is assembled, then the wall plate is assembled, and finally the top plate is installed. In one embodiment, the distance between the inner tank bottom plate and the outer tank bottom plate can be 800mm, and the distance between the inner tank top plate and the outer tank top plate can be 800mm, and the inner tank bottom plate and the outer tank top plate are supported by densely-distributed steel sections.

During assembly, the connection between the bottom plate and the wall plate is firstly assembled according to site construction conditions, so that the connection can ensure the stability of the initial wall plate when the initial wall plate is erected and the stability of continuous installation of the adjacent wall plates. Achieving better assembling effect. The manufacturing process of the invention comprises the following steps: measuring and paying off → blanking assembly → welding detection → connecting edge processing → integral assembly → positioning retesting → assembly welding → construction is finished. The oil tank is manufactured and installed through the construction sequence, and the expected target is achieved.

According to a second embodiment of the invention, the assembled oil tank is provided, the oil tank comprises an inner tank plate and an outer tank plate, the inner tank plate comprises an inner tank bottom plate, an inner tank wall plate and an inner tank top plate, the outer tank plate comprises an outer tank bottom plate, an outer tank wall plate and an outer tank top plate, and each inner tank plate and each outer tank plate are prefabricated integral oil tank plate surfaces; the connecting edges between the inner cabin wall plate and between the outer cabin wall plate and the outer cabin wall plate are prefabricated into a comb tooth tenon cross connection type, and the inner and outer angle steels are prefabricated and welded into a groove type at the connecting edges between the inner cabin bottom plate and the inner cabin wall plate, between the inner cabin top plate and the inner cabin wall plate, between the outer cabin bottom plate and the outer cabin wall plate and between the outer cabin top plate and the outer cabin wall plate.

Furthermore, the connection form that inside and outside angle steel becomes slot type and connects is inside lining angle steel and outside angle steel that adopt two angle steels of variation in size, fix respectively on medial surface and the lateral surface of a face connection limit, inside lining angle steel and outside angle steel are parallel to each other, the distance between inside lining angle steel and the outside angle steel is the thickness of face, two angle steels and a face welded fastening back form a double angle steel slot of perpendicular to face, during the equipment, with the face insertion inslot internal fixation that another needs to connect, two perpendicular equipment of face, preferably, inside lining angle steel adopts 5# angle steel, length is the same with wallboard length, outside lining angle steel adopts 10# angle steel, length is the same with wallboard length.

Furthermore, the comb-tenon cross-connection type connection mode is that the connection edge of the prefabricated board surface is cut into cross seams which are staggered with each other, and two assembled wall boards are vertically joggled and jointed; preferably, the width of the cross joint of the inner cabin wall plate is 2-3cm, the depth of the cross joint is 10-20cm, the distance between adjacent cross joints of the inner cabin wall plate is 2-3cm, the width of the cross joint of the outer cabin wall plate is 2-3cm, the depth of the cross joint is 6-10cm, and the distance between adjacent cross joints is 4-6 cm; preferably, the interior bulkhead panel intersection length exceeds the deck intersection (e.g., 500-1000mm) for support of the exterior bulkhead panel.

The invention has the beneficial effects that:

1. the oil tank is prefabricated in a prefabricated site by adopting the decomposition, so that the construction can be started in advance without being influenced by a construction site, and the construction progress can be improved.

2. Prefabricated place level is prefabricated, adopts the steel sheet to prevent deformation reinforcement measure and can effectively control steel sheet welding machine deformation, and horizontal welding is easy and simple to handle, compares traditional on-the-spot equipment welding, need not set up construction platform, can both have better control from welding quality, detection quality aspect.

3. The inner and outer angle steels are welded on the connecting edges of the deck boards in a prefabricated mode to form a groove type and a comb tooth tenon cross connection mode, so that the self-stabilization effect can be achieved at the initial stage of assembly, the deck boards can be quickly combined into a whole, and the whole can be reinforced as soon as possible after the assembly is completed.

4. The assembled connecting edges are processed, so that the whole oil tank has good sealing performance, and the connecting edges are reinforced by matching with angle steel. The overall strength is better.

In conclusion, the manufacturing process of the invention not only improves the construction quality, but also reduces the cost and improves the efficiency, and is a rapid construction technology for manufacturing the oil tank of the ship engineering.

Drawings

Fig. 1 is a view of an exploded view of an oil tank inner compartment.

Fig. 2 is a schematic diagram of prefabrication of an oil tank inner (outer) tank bottom plate, an inner (outer) tank wall plate and an inner (outer) tank top plate prefabrication field.

Fig. 3 is a processing diagram of the connecting edge of the oil tank wall plate comb tooth tenon (applicable to the inner tank and the outer tank).

FIG. 4 is a processing diagram of the tank bottom plate and the top plate with inner and outer angle steels forming a groove type connecting edge (suitable for the inner and outer tanks).

Fig. 5 is a schematic view of the overall structure of the inner chamber.

Fig. 6 is a schematic view of the overall structure of the outer chamber.

Fig. 7 is a plan view of the arrangement position of the inner and outer cabins.

FIG. 8 is a top view of the included angle of the comb tongue connection.

FIG. 9 is a top view of the inner and outer angles forming a trough-type connecting angle. Wherein a, b, c and d respectively show a structural schematic diagram of the fixed precast end of the double angle steel slot, a schematic diagram of inserting a connecting steel plate, a schematic diagram of fixing the steel plate in the slot and a schematic diagram of welding and fixing the end of the inserting slot.

FIG. 10 is a perspective view of the comb tongue connection of the inner deck panels.

Fig. 11 is a big picture of comb tenon connection of outer cabin wall plates.

FIG. 12 is a big drawing of the connection of inner and outer angle steels in a groove type (suitable for inner and outer cabins).

Description of the drawings: wherein A1-A4 are numbers of seams between the inner cabin wall plates and the inner cabin wall plates, the detailed connection is shown in figure 10, and the top view is shown in figure 8;

wherein B1-B4 are numbers of seams between the inner cabin wall plates and the inner cabin bottom plates, the detailed connection is shown in figure 12, and the top view is shown in figure 9;

wherein C1-C4 are numbers of seams between the inner cabin wall plates and the inner cabin top plates, the detailed connection is shown in figure 12, and the top view is shown in figure 9;

wherein D1-D4 are numbers of seams between the outer cabin wall plates and the outer cabin wall plates, the detailed connection is shown in figure 11, and the top view is shown in figure 8;

wherein E1-E4 are numbers of seams between the outer cabin wall plates and the outer cabin bottom plates, the detailed connection is shown in figure 12, and the top view is shown in figure 9;

wherein F1-F4 are the numbers of the seams between the outer cabin wall board and the outer cabin top board, the connection details are shown in figure 12, and the top view is shown in figure 9.

Description of reference numerals:

1-inner cabin roof; 2-inner cabin wall plate; 3-inner cabin bottom plate; 4-connecting sides of comb tooth tenons; 5-forming the inner and outer angle steels into a groove type connecting edge; 6-double angle steel slot; 7-oil tank plate surface; 8-oil tank plate surface; 9-lining angle steel; 10-outside angle steel; 11-outer deck wall panels; 12-inner cabin wall plate included angle; 13-a comb tooth tenon connection included angle; 14-fillet weld; 15-external reinforcing angle steel welding seam; 16-an outer deck board; 17-inner deck board.

Detailed Description

In order to make the technical means of the present invention more clearly understood and to make the same practical in accordance with the contents of the specification, the present invention will be further described with reference to the following embodiments and the accompanying drawings.

The main equipment tools referred to in the examples and comparative examples included: truck crane (lease), submerged arc welding machine, steel plate butt-joint fixing device, steel tape, steel plate cutting machine (lease) and measuring and detecting instrument.

Example (b):

a manufacturing process of a fabricated double-layer oil tank with specification sizes of 8800mm multiplied by 9000mm comprises the following steps:

1. and (3) construction material prefabrication stage:

decomposing the oil tank into an inner tank plate and an outer tank plate, wherein the inner tank plate comprises three parts, namely an inner tank bottom plate 3 (with the size of 8000mm long multiplied by 8000mm wide multiplied by 30mm thick), four inner tank wall plates 2 (with the size of 8000mm long multiplied by 8200mm wide multiplied by 30mm thick), and an inner tank top plate 1 (with the size of 8000mm long multiplied by 8000mm wide multiplied by 30mm thick), the outer tank plate comprises three parts, namely an outer tank bottom plate (with the size of 8800mm long multiplied by 8800mm wide multiplied by 30mm thick), four outer tank wall plates (with the size of 8800mm long multiplied by 9000mm wide multiplied by 30mm thick), and an outer tank top plate (with the size of 8800mm long multiplied by 0mm wide multiplied by 30mm thick) (as shown in figure 1), each inner tank plate and each outer tank plate are prefabricated respectively;

carrying out measurement lofting, blanking assembly, plate surface and weld joint reinforcement on steel plates (the steel plates have the dimensions of 1200mm in length, 1000mm in width and 30mm in thickness) for forming each cabin plate, welding and aligning according to the requirements of design documents, prefabricating an integral panel as one cabin plate (as shown in figure 2), and prefabricating other cabin plates sequentially or simultaneously; the field treatment of connecting the limit is carried out after the welding of whole deck plate face is accomplished, and the processing can be divided into: inner and outer angle steels are prefabricated and welded into a groove type (as shown in figures 4, 9 and 12, the inner and outer angle steels are grooved connecting edges 5) and a comb tenon cross-connecting type (as shown in figure 3, the comb tenon connecting edges 4), wherein transverse seams of an inner cabin bottom plate and an inner cabin wall plate, transverse seams of an inner cabin wall plate and an inner cabin top plate, transverse seams of an outer cabin bottom plate and an outer cabin wall plate and transverse seams of an outer cabin wall plate and an outer cabin top plate are all connected in a groove type by adopting the inner and outer angle steels (as shown in figures 9 and 12), connecting edges between the inner cabin wall plate and between the outer cabin wall plate and the outer cabin wall plate are prefabricated and comb tenon cross-connecting type (as shown in figures 10 and 11), as shown in figure 12, the inner and outer angle steels are welded and fixed on the inner side surface and the outer side surface of an oil cabin plate 8 (the inner cabin bottom plate or the inner cabin top plate or the outer cabin bottom plate or the outer cabin top plate or the, inside lining angle steel 9 and outside angle steel 10 are parallel to each other, the distance between inside lining angle steel and the outside angle steel is the thickness of tank deck face 8, two angle steels form a double angle steel slot 6 of perpendicular to tank deck face 8 with 8 welded fastening of a tank deck face, during the equipment, with another tank deck face 7 that needs to connect through notch insertion groove internal fixation, realize the perpendicular equipment of two faces, what need after the equipment is accomplished is welding (fillet weld) and alignment work, preparation and connection process are shown in fig. 9.

In the comb tenon cross connection mode, a steel plate cutting machine is adopted to cut the connecting edge of the plate surface of the inner (outer) cabin wall plate into staggered cross seams (shown in figure 3), the width of the cross seam of the inner cabin plate is 3cm, the distance between adjacent cross seams is 6cm, the depth of the cross seam is 83cm, the width of the cross seam of the outer cabin plate is 3cm, the distance between adjacent cross seams is 6cm, the depth of the cross seam is 3cm, two plate surface comb tenons to be assembled are vertically jointed (shown in figure 8), an inner corner welding seam 14, an outer corner reinforcing and an outer reinforcing angle steel welding seam 15 (shown in figure 8) are formed after the combination is finished, the inner cabin wall plate and the outer cabin wall plate are different in comb tenon cross, the inner cabin wall plate exceeds the plate surface (shown in figure 5), the comb tenon cross of the outer cabin wall plate is the same as the plate surface thickness of the outer cabin wall plate and does not exceed the plate surface of the outer cabin wall plate (shown in figure 6), the main task of this work is to carry out accurate laying-out to adjacent both sides face junction to this error when reducing the equipment.

Wherein, the connection order that the angle steel becomes the slot type inside and outside the precast welding is: welding inner and outer angle steels on the connecting edge of the steel plate → hoisting and assembling the steel plate → inserting the steel plate into the slot → positioning and welding the inner and outer angle steels.

2. And (3) oil tank assembling and reinforcing:

assemble each oil tank face of accomplishing through the truck crane, the equipment is installed the outer cabin bottom plate of oil tank earlier, install the wallboard behind the fixed bottom plate, the connection limit that at this moment will handle is the connection of bottom plate and wallboard, the steel sheet that just will handle inside and outside angle steel grooving is connected, then when installing other wallboards, when the connection limit that will handle the bottom plate promptly will be connected inside and outside angle steel grooving simultaneously again and is connected, the slot that utilizes adjacent face is connected each adjacent face, accomplish the initial stage self-stability of an equipment, then carry out the fine tuning on former basis, consolidate, the full weld, until reaching the design requirement.

The inner cabin wallboard includes an inner cabin bottom plate, four inner cabin wallboards, an inner cabin roof, and the outer cabin wallboard includes an outer cabin bottom plate, four outer cabin wallboards, an outer cabin roof, and in the assembling process, the equipment order of each inner cabin wallboard (between bottom plate and the wallboard, between wallboard and the roof) is: the bottom plate is assembled, then the wall plate is assembled, and finally the top plate is installed. In one embodiment, the distance between the inner deck floor and the outer deck floor is 800mm, and the assembly sequence of the outer deck boards is: the bottom plate is assembled, then the wall plate is assembled, and finally the top plate is installed. In one embodiment, the distance between the inner and outer deck floor and roof is 800mm, and both are supported by densely-distributed steel.

As shown in fig. 7, when the comb teeth and tenons of the inner tank of the oil tank are assembled in a cross connection manner, the comb teeth and tenons of the adjacent plate surfaces of the inner tank of the oil tank are used for cross connection, the cross length exceeds the plate surface cross by 800mm (the distance between the interlayer of the inner tank plate and the outer tank plate of the oil tank is shown in fig. 8), and the exceeding part serves as an internal supporting function of the inner tank to the outer tank. During the equipment of the oil tank outer tank comb tenon cross connection type, the cross length of the surface and the plate surface of the oil tank outer tank wallboard is the body thickness of the oil tank wallboard surface, and the connection type outer angle of the outer tank is welded by using the reinforcing angle steel. And finishing the assembly of the board surface.

When the oil tank is assembled, the inner angle steel and the outer angle steel are adopted to form a groove type for connecting the oil tank bottom plate with the wall plate and the top plate, and the vertical seam for connecting the wall plate with the wall plate adopts a comb tenon cross connection mode, so that the connection can ensure the stability of the initial wall plate when the wall plate is erected and the stability of the continuous installation of the adjacent wall plates. But also enables the top plate to be tightly combined with the whole hatch. Achieving better assembling effect.

The construction sequence is as follows: measuring and paying off → blanking assembly → welding detection → connecting edge processing → integral assembly → positioning retesting → assembly welding → construction is finished. The oil tank is manufactured and installed through the construction sequence, and the expected target is achieved.

Compared with the field welding and assembling, the assembly type oil tank manufactured by the invention has the advantages that: the requirement on construction conditions is not high in the early stage, the construction can be started in a prefabricated field, the working time can be shortened by starting in advance, auxiliary facilities such as vertical installation scaffold erecting and the like are avoided in horizontal prefabrication of the prefabricated field, and the construction quality can be guaranteed.

Comparative example

Make a specification and dimension and be 8800mm 9000 mm's double-deck oil tank, at first need harden oil tank basis ground all around, then lease the scaffold frame, it sets up to carry out the construction working face, all need splice with hoist machinery hoist and mount steel sheet more than the first floor in the installation, splice seam welding after needing alignment many times, the uneven vertical focus skew of wallboard that can influence of being heated in the welding process causes and produces the deformation, finally accomplish the wallboard welding in whole complicated assembling process, for preventing dead weight deformation during the roof installation, still need set up interim support in the interior cabin, wait to dismantle interim support again after whole completion welding. The construction method has the advantages that the construction cost is very high regardless of foundation treatment, scaffold construction platform erection and dismantling.

The cost and time required to use the method of the comparative example were:

under the condition of normal manufacturing period, the traditional construction method needs 6 ten thousand yuan for scaffold (lease) erection, disassembly and foundation hardening, 180 workers for welders, 180 workers for fitters and 360 workers for general workers are needed for butt joint and welding, and the total labor cost is about 21.6 ten thousand. All cost 27.6 ten thousand dollars without the inclusion of transportation and temporary measures. Five teams are constructed simultaneously for 36 days.

The cost and time required by the process of the invention are as follows:

renting 1 16-ton truck crane for 1200 Yuan/day and using for 2 days. The cost for cutting the connecting edge of the wall plate is 5000 yuan, and the prefabrication welding and the assembly welding need to use manpower: 120 workers, 120 workers and 240 workers for the welders and the fitters, and the total labor cost is about 14.4 ten thousand. All charges are 15.14 ten thousand. Five teams are constructed simultaneously for 24 days.

Compared with the two construction modes, the cost is saved by about 12.46 ten thousand yuan. Meanwhile, the prefabricated wall plate is convenient to construct, the construction speed is high, the efficiency and the quality are guaranteed, the waiting time of work such as scaffold platform dismantling is reduced, and the construction period is 12 days ahead of the traditional mode.

While the above detailed description of the fabrication process of the fabricated cargo tank provided by the present invention has been provided, it will be appreciated by those skilled in the art that changes and modifications may be made in the embodiment and its application without departing from the spirit of the invention. In summary, the content of the present specification should not be construed as limiting the present invention, and any modification made according to the design concept of the present invention is within the scope of the present invention.

Claims (10)

1. An assembled oil tank manufacturing process, comprising:

firstly, prefabricating an oil tank plate surface:

the oil tank is decomposed into an inner tank plate and an outer tank plate, the inner tank plate comprises an inner tank bottom plate, an inner tank wall plate and an inner tank top plate, the outer tank plate comprises an outer tank bottom plate, an outer tank wall plate and an outer tank top plate, and the inner tank plate and the outer tank plate are respectively prefabricated to form an integral oil tank plate surface; then, the processing of connecting edges is carried out, and the processing can be divided into: the connecting edges between the inner cabin wall plate and between the outer cabin wall plate and the outer cabin wall plate are prefabricated into a comb tenon cross connection type, and inner and outer angle steels are prefabricated and welded into a groove type at the connecting edges between the inner cabin bottom plate and the inner cabin wall plate, between the inner cabin top plate and the inner cabin wall plate, between the outer cabin bottom plate and the outer cabin wall plate and between the outer cabin top plate and the outer cabin wall plate;

secondly, assembling and reinforcing the oil tank plate surface:

assembling each prefabricated oil tank plate surface, namely, firstly, connecting an inner tank wall plate and an inner tank bottom plate, an inner tank wall plate and an inner tank top plate, an outer tank bottom plate and an outer tank wall plate, and connecting each adjacent plate surface by using an inserting groove of the adjacent plate surface, and then reinforcing and full-welding;

secondly, the inner cabin wall plate and the inner cabin wall plate, and the outer cabin wall plate are assembled in a comb tenon cross connection mode, when the inner cabin wall plate and the outer cabin wall plate are assembled, the comb tenons of the adjacent plate surfaces are used for cross connection, the cross length of the inner cabin wall plate exceeds the plate surface cross (for example, 500-1000mm) so as to be used for supporting the outer cabin wall plate, then fillet weld is carried out on the inner corners of the cross corners, the opposite corners of the inner corners are welded through reinforcing angle steel, the assembly of the inner cabin wall plate is completed, the cross length of the outer cabin wall plate is the same as the plate thickness of.

2. The fabricated oil tank manufacturing process according to claim 1, wherein prefabrication comprises steel plate measurement lofting, blanking group pairing, plate face and weld reinforcement, welding and alignment.

3. The manufacturing process of the assembled oil tank according to claim 1 or 2, wherein the oil tank is manufactured by integrally decomposing the oil tank into an inner tank plate and an outer tank plate, the inner tank plate comprises an inner tank bottom plate, four inner tank wall plates and an inner tank bottom plate, the outer tank wall plates comprise an outer tank bottom plate, four outer tank wall plates and an outer tank top plate, the plate surfaces are prefabricated in a prefabricating site respectively, and the oil tank is assembled after the plate surfaces are completed.

4. The fabricated oil galley of any one of claims 1-3, wherein the assembly sequence of the individual inner deck boards is: assembling a bottom plate, assembling wall plates and finally installing a top plate; the assembly sequence of the outer cabin plate is as follows: the bottom plate is assembled, then the wall plate is assembled, and finally the top plate is installed.

5. The fabricated oil tank manufacturing process according to any one of claims 1 to 4, wherein the distance between the inner tank bottom plate and the outer tank bottom plate is 800mm, the distance between the inner tank top plate and the outer tank top plate is 800mm, and the inner tank bottom plate and the outer tank top plate are supported by densely-distributed steel sections.

6. The fabricated oil tank manufacturing process according to any one of claims 1 to 5, wherein the connection form of the groove connection of the inner angle steel and the outer angle steel is that two angle steels with different sizes, namely lining angle steel and outer angle steel, are respectively fixed on the inner side surface and the outer side surface of the connection edge of one plate surface, the lining angle steel and the outer angle steel are parallel to each other, the distance between the lining angle steel and the outer angle steel is the thickness of the plate surface, the two angle steels are welded and fixed with one plate surface to form a double angle steel slot perpendicular to the plate surface, when in assembly, the other plate surface to be connected is inserted into the slot to be fixed, and the two plate surfaces are assembled vertically.

7. The process of manufacturing an assembled oil tank according to any one of claims 1 to 5, wherein the comb-tenon cross-connection type connection is formed by cutting the connecting edges of the prefabricated plate surfaces into cross-slits which are staggered with each other, and vertically tenon-jointing the assembled two wall plates.

8. The process of manufacturing an assembled oil hold of claim 7, wherein the width of the cross-over seam of the inner hold wall panel is 2-3cm, the depth of the cross-over seam is 10-20cm, the distance between adjacent cross-over seams of the inner hold wall panel is 2-3cm, the width of the cross-over seam of the outer hold wall panel is 2-3cm, the depth of the cross-over seam is 6-10cm, and the distance between adjacent cross-over seams is 4-6 cm.

9. An assembled oil tank is characterized in that the oil tank comprises an inner tank plate and an outer tank plate, the inner tank plate comprises an inner tank bottom plate, an inner tank wall plate and an inner tank top plate, the outer tank plate comprises an outer tank bottom plate, an outer tank wall plate and an outer tank top plate, and each inner tank plate and each outer tank plate are prefabricated into a whole oil tank plate surface; the connecting edges between the inner cabin wall plate and between the outer cabin wall plate and the outer cabin wall plate are prefabricated into a comb tooth tenon cross connection type, and the inner and outer angle steels are prefabricated and welded into a groove type at the connecting edges between the inner cabin bottom plate and the inner cabin wall plate, between the inner cabin top plate and the inner cabin wall plate, between the outer cabin bottom plate and the outer cabin wall plate and between the outer cabin top plate and the outer cabin wall plate.

10. The fabricated oil tank of claim 9, wherein the inner and outer angle steels are connected in a groove manner by using two different sizes of angle steels, namely an inner lining angle steel and an outer side angle steel, which are respectively fixed on the inner side surface and the outer side surface of a plate surface connecting edge, the inner lining angle steel and the outer side angle steel are parallel to each other, the distance between the inner lining angle steel and the outer side angle steel is the thickness of a plate surface, the two angle steels and one plate surface are welded and fixed to form a double angle steel slot perpendicular to the plate surface, when in assembly, the other plate surface to be connected is inserted into the slot and fixed, the two plate surfaces are vertically assembled, preferably, the inner lining angle steel is 5# angle steel, the length of the inner lining angle steel is the same as that of the wall plate, and the outer; and/or

The comb tooth tenon cross connection type connection mode is that the connection edge of the prefabricated plate surface is cut into cross seams which are staggered with each other, and two assembled wall plates are vertically joggled; preferably, the width of the cross joint of the inner cabin wall plate is 2-3cm, the depth of the cross joint is 10-20cm, the distance between adjacent cross joints of the inner cabin wall plate is 2-3cm, the width of the cross joint of the outer cabin wall plate is 2-3cm, the depth of the cross joint is 6-10cm, and the distance between adjacent cross joints is 4-6 cm; preferably, the interior bulkhead panel intersection length exceeds the deck intersection (e.g., 500-1000mm) for support of the exterior bulkhead panel.

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