Full-liquid-receiving double-disc type stainless steel inner floating roof independent beam structure

Abstract

The utility model discloses a full liquid receiving double-disc type stainless steel inner floating roof independent beam structure, which relates to the technical field of full liquid receiving floating discs, and comprises an outer ring beam, a main beam and an auxiliary beam are arranged in the outer ring beam, the main beam and the auxiliary beam are detachably connected with a floating box, and the main beam and the auxiliary beam are hollow sealing structures with buoyancy. The main beam is transversely arranged, the top of the main beam is provided with a first installation piece used for being connected with the buoyancy tank, and the main beam and the first installation piece are of a welding structure and form continuous equidistant welding arrangement in the outer ring beam. The utility model provides a full-liquid-receiving double-disc type stainless steel inner floating roof independent beam structure which enables the whole beam to have certain buoyancy and saves materials for floating discs. The beam structure forms a stable framework which has bearing force on the floating disc body on the lower portion of the floating disc, serves as a support for overall installation of the floating disc and is suitable for all module type assembly type full-liquid-receiving floating discs, and different floating discs only need to be properly adjusted according to the distance between the floating boxes and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to full liquid floating disc technical field, concretely is full liquid double disc type stainless steel inner floating roof independent beam structure. BACKGROUND

[0002] In the practical popularization and application process of full liquid stainless steel double disc type inner floating disc, according to the demand of customer, floating disc appears two structure forms: one is beamless structure;Two are beam type structures. The market share of beamless structure is higher, and the configuration is relatively mature, and the market share of beam type structure is smaller, but still has certain demand.

[0003] Full liquid double disc type floating disc is completely different from traditional floating disc (mainly refers to assembled aluminum floating disc and single disc type steel floating disc), and the aluminum floating disc must have beam structure to build the overall structure of floating disc;And single disc type steel floating disc, although its appearance does not show beam structure, but its buoyancy cabin is welded with various mechanical supports when constructing, and these support structures are composed of many long and short beams. Therefore, the traditional floating disc structure cannot be supported by beam. But the full liquid floating disc is different, because the whole floating disc is connected by bolts in space level (three-dimensional space) by several three-dimensional cubic floating box modules, and each floating box module is filled with metal reinforcing structure according to the uniform standard, so that the floating box has high strength. Therefore, the floating box itself is endowed with the function of beam, and when they form the floating disc surface, a relatively good stable structure is formed.

[0004] At present, the known existing floating disc has the following actual technical problems:

[0005] The support beam structure of floating disc has weak mechanical properties, and most of the full liquid floating discs on the market adopt "J" type clamping plate beam and "J" type supporting plate. Although this structure plays a certain supporting role on the left and right floating boxes, but at the same time, due to the two shoulder supports (or supporting plate design), the connecting wing plate under the floating box conflicts with it during installation, so many manufacturers directly cancel the connecting wing plate (angle steel) under the floating box to facilitate the installation of J type beam. But in this way, it actually destroys the connection support of floating box in three-dimensional space, and from the mechanical point of view, the addition of J beam makes this place (referring to the combination part of beam and floating box) a weak part, because the bolt connection is lost, and only loose support, which becomes a burden of floating disc in a certain sense.

[0006] The whole beam material is made of 304 steel plate with a thickness of 2-3 mm, thus increasing the weight, and the beam itself cannot generate buoyancy, so the additional weight needs the pontoon to provide a buoyancy of more than 2.5 times its own weight. Compared with the pontoon without the beam, obviously other technical means need to be used to increase the buoyancy of the pontoon to balance the weight of the beam to meet the design requirements, which is also a technical difficulty currently faced by the full liquid contact pontoon.

[0007] Another type is the box beam structure design, which is actually a small version of the pontoon. The beam structure section (not including the connecting wing plate) has a size of 120 mm*120 mm, making it look more like a beam configuration. Its connection mode and manufacturing process are completely consistent with the pontoon, except that the material thickness is increased. The material thickness is generally selected to be 1.8 mm. The connection with the pontoon is completely the same, and the upper and lower wing plates are connected without damaging the integrity of the pontoon. In addition, the beam forms a closed cavity like the pontoon, thus having a certain buoyancy. However, due to the increase in material thickness and the small cavity space, the generated buoyancy and weight ratio is about 1.2. However, this box beam is actually a pontoon, except that the material is thicker. Therefore, the legs are selected to be directly installed at the lower part. The length of the beam is generally limited by the manufacturing equipment and cannot be bent into a shape that is too long. Generally, the length is the same as that of the pontoon, about 3000 mm. In addition, the beam cannot be installed separately from the pontoon to form a net-like structure that is beneficial to the pontoon to reduce the auxiliary scaffold. The scaffold can only be erected, and the pontoon can be installed in synchronization with the pontoon. Therefore, the box beam may only be a nominal beam and does not enhance the structure of the pontoon. At the same time, it has a significant and cannot be ignored weakness, that is, the box beam inevitably occupies the space of the pontoon, increases the total material and weight of the pontoon, and will definitely lead to the decrease of the pontoon float-to-weight ratio. According to our calculation, a 21 m pontoon without a beam has a float-to-weight ratio of 2.5. After adding the beam in the form of a box beam, the float-to-weight ratio will decrease to about 2.3. In this way, the beam actually hinders the pontoon. Therefore, the box beam structure does not have obvious effect and gain for the pontoon.

[0008] The production cost is high, which is a serious defect of the above-mentioned "several" type of plywood beam and box beam. It is difficult to achieve a good balance point between structural strength design and economic value, which is not conducive to the economic benefits and long-term development of enterprises. Practical new type content

[0009] The utility model discloses a full liquid double disc type stainless steel inner floating roof independent beam structure, which has certain buoyancy, saves materials for the floating disc, has high structural strength, can be well applied to actual production, creates economic benefits for enterprises, reduces production cost, adopts the combination of main beams and auxiliary beams, the whole beam structure can be independently formed into a network, the beam structure forms a stable framework with bearing capacity for the disc body of the floating disc at the lower part of the floating disc, and can become the support for the overall installation of the floating disc.

[0010] To achieve the above object, the utility model adopts the technical scheme of:

[0011] The full liquid double disc type stainless steel inner floating roof independent beam structure includes an outer ring beam, a plurality of main beams and auxiliary beams for bearing floating boxes are arranged in the outer ring beam, the two main beams can be detachably connected at the head and tail, the floating boxes are detachably connected on the main beams and the auxiliary beams, the main beams and the auxiliary beams are hollow sealed square tubular structures made of stainless steel material, a first mounting piece for connecting the floating box is arranged at the top of the main beam, the main beam and the first mounting piece are welded and connected, a third mounting piece for connecting the floating box is arranged at the top of the auxiliary beam, and the auxiliary beam and the third mounting piece are welded and connected.

[0012] As a further improvement of the above scheme, a plurality of supporting legs are arranged around the bottom of the outer ring beam.

[0013] As a further improvement of the above scheme, the first mounting piece is in a sheet structure provided with a plurality of mounting holes.

[0014] As a further improvement of the above scheme, a second mounting piece for mounting one end of the auxiliary beam is arranged at the side of the main beam.

[0015] As a further improvement of the above scheme, the second mounting piece is in a bent plate structure.

[0016] As a further improvement of the above scheme, the third mounting piece is in a U-shaped structure with mounting holes.

[0017] As a further improvement of the above scheme, mounting plates in U-shaped plate structures are arranged at the ends of the main beams and the auxiliary beams.

[0018] As a further improvement of the above scheme, the main beams and the auxiliary beams are square tubular structures made of stainless steel material.

[0019] Compared with the prior art, the utility model has the beneficial effects of:

[0020] The main beam and the auxiliary beam are both hollow sealed structures, and can become buoyancy bodies after being sealed, thereby minimizing the load of the self weight on the buoyancy of the floating disc;

[0021] According to the structural characteristics of the full-liquid floating disc, the beam structure is arranged as "main beam + auxiliary beam", the main beam and the first mounting member are in a welding structure and form a continuous equidistant welding arrangement in the outer ring beam, so that the main beam can bear more load, and the deficiencies of the main beam and the auxiliary beam in bearing are balanced, the main beam is a main connecting and bearing structure and is connected into a large frame, and the auxiliary beam is connected between the main beams and increases the density and overall strength of the beams.

[0022] The main beam and the auxiliary beam are both hollow sealed structures, and can become buoyancy bodies after being sealed, thereby minimizing the load of the self weight on the buoyancy of the floating disc;

[0023] High versatility and compatibility, the beam structure designed in the application is universal for all full-liquid stainless steel floating discs, and the specific size can be adjusted according to the diameter of the floating disc. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a three-dimensional structure schematic view of the utility model.

[0025] Figure 2 It is a three-dimensional structure schematic view of the utility model without the floating box.

[0026] Figure 3 It is a three-dimensional structure schematic view of the utility model without the floating box.

[0027] Figure 4 It is a three-dimensional structure schematic view of the utility model without the floating box.

[0028] Figure 5This is a top view schematic diagram showing the welding relationship between the main beam and the auxiliary beam and the floating roof of this utility model.

[0029] The text labels in the figure represent: 1. Floating box; 2. Support leg; 3. Outer ring beam; 4. Main beam; 5. Sub-beam; 401. First mounting component; 402. Second mounting component; 501. Third mounting component. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solution, the present invention will be described in detail below with reference to the embodiments. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0031] like Figures 1-5 As shown, the specific solution of this embodiment is as follows: a fully liquid-contact double-disc stainless steel internal floating roof independent beam structure, including an outer ring beam 3, with multiple main beams 4 and secondary beams 5 arranged inside the outer ring beam 3 for supporting the floating box 1. The two main beams 4 can be detachably connected end to end. The floating box 1 is detachably connected to the main beams 4 and secondary beams 5. The main beams 4 and secondary beams 5 are hollow sealed square tubular structures made of stainless steel. The top of the main beam 4 is provided with a first mounting part 401 for connecting the floating box 1. The main beam 4 and the first mounting part 401 are welded together. The top of the secondary beam 5 is provided with a third mounting part 501 for connecting the floating box 1. The secondary beam 5 and the third mounting part 501 are welded together.

[0032] More specifically, to minimize the external load on the floating roof imposed by traditional "U"-shaped beams and box girders, the main body of the beam uses 120mm*120mm*1.8mm hollow stainless steel profiles, which brings two significant technical benefits:

[0033] 1. To give the entire beam a certain buoyancy, calculations show that a 120mm*120mm hollow beam can generate 10.08kg of buoyancy per meter (using gasoline as the medium, density: 700kg / m³). 3 The weight of one meter of the float is 6.75 kg, so its buoyancy ratio is 10.08 kg ÷ 6.75 kg = 1.5. This shows that the buoyancy generated by the beam structure can make itself float. In other words, in the entire floating platform structure, the beam structure provides part of the buoyancy and will not cause a large drag on the buoyancy of the entire floating platform. Thus, the floating platform can achieve the requirement of a buoyancy ratio of 2.5 without adding buoyancy to the float box 1.

[0034] 2. More specifically, the biggest advantage of the beam structure's self-storing buoyancy is that it saves a significant amount of material on the floating roof. For example, if the beam structure itself cannot generate buoyancy and relies entirely on pontoon 1 for buoyancy, the buoyancy provided by pontoon 1 would not reach the required buoyancy-to-weight ratio of 2.5 for the floating roof. Therefore, pontoon 1 must be thickened to increase buoyancy. The thickness of the floating roof is typically increased by one increment (30mm), and each increment increases the weight of the floating roof by 3kg per square meter. For a 30m floating roof, this would increase the weight by 2064kg. Based on a purchase cost of 18 yuan per kilogram, the net material cost alone would increase by more than 37,000 yuan.

[0035] This application has excellent structural strength. The main beam is made of 304 stainless steel 120mm*120mm*1.8mm profile (square tube), which has excellent structural strength. The yield strength of the material reaches 275MPa, making it a high-quality material for constructing beam structures. The combination of the profile with other components further increases the strength performance of the beam.

[0036] This application is of great significance to the overall installation of floating roofs. The installation of fully liquid-contact floating roofs usually requires the pre-construction of an "installation auxiliary platform (commonly known as scaffolding)" inside the storage tank before the formal installation. This installation auxiliary platform is composed of construction steel pipes, and the total material of the installation auxiliary platform for a 30m floating roof is generally around 10-12 tons. This means that building such a platform will add all the costs incurred in this process, such as: material costs, transportation costs, installation costs, dismantling costs, as well as the resulting labor and time costs, etc. However, the application of the new beam structure reduces these costs to zero, and its effect is obvious and its significance is great.

[0037] This application completely breaks through the traditional concepts of "U"-shaped beams and box beams, becoming a true beam with all the elements of a beam. The new beam structure has excellent structural strength and load-bearing capacity, which truly strengthens the entire floating roof and makes its performance more outstanding, thus truly meeting the needs of customers.

[0038] like Figure 1 As shown, in a preferred embodiment, the outer ring beam 3 is provided with a plurality of legs 2 around its bottom circumference.

[0039] like Figure 1 As shown, in a preferred embodiment of the above, the first mounting member 401 has a sheet-like structure with a plurality of mounting holes.

[0040] like Figure 1 As shown, in a preferred embodiment, the side of the main beam 4 is provided with a second mounting member 402 for mounting one end of the sub-beam 5.

[0041] likeFigure 1 As shown, in a preferred embodiment of the above, the second mounting member 402 has a bent plate-like structure.

[0042] like Figure 1 As shown, in a preferred embodiment of the above, the third mounting member 501 has an incline structure with mounting holes.

[0043] like Figure 1 As shown, in a preferred embodiment, both the main beam 4 and the secondary beam 5 are provided with mounting plates of a U-shaped plate structure at their ends.

[0044] like Figure 1 As shown, in a preferred embodiment of the above, the main beam 4 and the secondary beam 5 are square tubular structures made of stainless steel.

[0045] Compared with the prior art, this utility model has the following advantages:

[0046] The connection between the main beam 4 and the secondary beam 5 and the pontoon 1 is achieved by welding each connector to the upper plane of a 120*120 square tube, forming an inseparable whole with the square tube (as per the instruction manual). Figure 4 As shown in the figure, during connection, simply connect the bolts to the holes of the pontoon 1 at the corresponding installation positions of each beam. Whether it is the main beam 4 or the secondary beam 5, the density of the connecting holes is consistent with the opening density of the pontoon 1. The hole spacing of the pontoon 1 connecting holes of the beam structure floating table is designed to be 132mm (short distance and high density). Therefore, the hole spacing on all beams is also 132mm. This bolt connection with short distance and high density ensures that the beam and the floating table form a firm and reliable combination.

[0047] The connection structure of the main beam 4 is different from that of the secondary beam 5. The specific dimensions of the first mounting component 401 can be designed as 260mm high * 1.2mm thick. The main beam 4 and the first mounting component 401 are welded together to form a "Zhan" shaped cross section, which increases the stress-bearing cross section.

[0048] For the strength calculation of the beam, according to the strength calculation formula: б=F÷s, where F is the minimum force that the material experiences when it yields, and s is the average weight of the floating roof that the beam bears. The strength of failure caused by the gravity (the force that the floating roof experiences under normal conditions) is evaluated and compared with its yield strength.

[0049] Take a 22.6m disc as an example, its total weight is 15102kg, the total length of the beam is 227.36m, the average weight of the beam carried by the float is 15102kg ÷ 227.36m = 66.42kg / m; The setting of the leg 2 on the beam is 3m, that is, the total load on the beam between the two legs 2 is 66.42kg / m*3m=199.26kg, converted into F, according to F=G=mg, g is the gravitational constant g=9.8N / kg, can be obtained F=199.26kg*9.8N / kg=1953N;

[0050] In the above formula, s is the cross-sectional area of the force material (square meters), according to the two materials selected for the main beam 4, one is a 120mm*120mm*1.8mm 304 square tube, and the other is a 260mm*1.2mm 304 clamping plate, The cross-sectional area of the beam formed by combining them should be equal to the sum of the cross-sectional areas of the above two materials, that is, s=s1+s2=2(120mm+120mm-2*1.8mm)*1.8mm+260mm*1.2mm=851mm 2 +312mm 2 =0.001163m 2 Therefore, the destructive strength of the beam between the legs 2 of the float under the load of its own weight is: 破坏 =F ÷ s =1953N ÷ 0.001163m 2 =1679278Pa=1.68MPa, compared with the yield strength of 304 stainless steel material б304≥205Mpa (check “Design Manual, Austenitic Stainless Steel Chemical Composition and Mechanical Properties (GB / T1221-1992)”) can be known: б 破坏 ∝б 304 , that is, the main beam 4 will be damaged by the load under the condition of bearing the load (weight) of the float. The destructive strength caused by the load is much smaller than the yield strength of the 304 material itself, so from the perspective of mechanics, the main beam 4 has good strength.

[0051] According to the same method, the destructive strength of the secondary beam 5 to it when carrying the load of the float is: 副破坏 =2.3Mpa, also б 副破坏 ∝б 304 This shows that the secondary beam 5 also has good strength. In summary, whether it is the main beam 4 or the secondary beam 5, both have good strength, and when they are combined and associated with each other, their stability is also good.

[0052] It should be noted that in this paper, the term includes, contains or any other variant is intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes the elements inherent to such process, method, article or device. The principle and implementation of the present application are described by applying specific examples. The above examples are only used to help understand the method and core idea of the present application. The above is only the preferred embodiment of the present application. It should be pointed out that due to the limited expression of the text, there are objectively infinite specific structures. For ordinary technical personnel in this technical field, without departing from the principle of the present application, some improvements, refinements or changes can be made, and the above technical features can be combined in a proper way; these improvements, refinements, changes or combinations, or without improvement, the concept and technical scheme of the present application are directly applied to other occasions, which should be regarded as the protection scope of the present application.

Claims

1. A full liquid double disc type stainless steel inner floating roof independent beam structure, characterized in that, The outer ring beam (3) is internally provided with a plurality of main beams (4) and auxiliary beams (5) for bearing the floating box (1), the two main beams (4) can be detachably connected in a head-to-tail mode, the main beams (4) and the auxiliary beams (5) are hollow sealed square tubular structures made of stainless steel, the top of the main beam (4) is provided with a first mounting piece (401) for connecting the floating box (1), the main beam (4) and the first mounting piece (401) are in a welded connection structure, the top of the auxiliary beam (5) is provided with a third mounting piece (501) for connecting the floating box (1), and the auxiliary beam (5) and the third mounting piece (501) are in a welded connection structure.

2. The full-liquid double-disc stainless steel inner floating roof independent beam structure according to claim 1, characterized in that, A plurality of supporting legs (2) are arranged around the bottom of the outer ring beam (3).

3. The full liquid level double disc stainless steel inner floating roof independent beam structure according to claim 1, characterized in that, The first mounting piece (401) is in a sheet structure provided with a plurality of mounting holes.

4. The full liquid level, two disc, stainless steel, inner floating roof, individual beam structure according to claim 1, characterized in that, The side of the main beam (4) is provided with a second mounting piece (402) for mounting one end of the auxiliary beam (5).

5. The full liquid contact double plate stainless steel inner floating roof independent beam structure according to claim 4, characterized in that, The second mounting piece (402) is in a bent plate structure.

6. The full liquid level, two disc, stainless steel, inner floating roof, individual beam design as claimed in claim 1, wherein, The third mounting piece (501) is in a U-shaped structure with mounting holes.

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