Fully wetted double disc stainless steel inner floating disc independent beam structure

Abstract

The present invention discloses a fully liquid-connected double-disc stainless steel inner floating plate independent beam structure, which relates to the technical field of fully liquid-connected floating plates, including an outer ring beam, a main beam and a secondary beam are arranged inside the outer ring beam, a pontoon can be detachably connected and arranged on the main beam and the secondary beam, the main beam and the secondary beam are hollow sealed structures with buoyancy, the main beam is arranged horizontally and a first mounting piece for connecting the pontoon is arranged on the top, the main beam and the first mounting piece are welded structures and form a continuous equidistant welding arrangement inside the outer ring beam. The present invention provides a fully liquid-connected double-disc stainless steel inner floating plate independent beam structure, so that the entire beam has a certain buoyancy, which saves materials for the floating plate, the entire beam structure can be independently formed into a network, the beam structure forms a load-bearing and stable structure for the floating plate body at the lower part of the floating plate, and becomes the support for the overall installation of the floating plate, which is suitable for all modular assembled fully liquid-connected floating plates, and different floating plates only need to be properly adjusted according to the spacing of the pontoons.

Description

Technical Field

[0001] The invention relates to the technical field of a fully liquid-connected floating plate, in particular to a fully liquid-connected double-plate stainless steel inner floating plate independent beam structure. Background Art

[0002] In the actual promotion and application of the fully liquid-contacted stainless steel double-disc internal floating plate, two structural forms of floating plates have emerged according to customer needs: one is a beamless structure; the other is a beamed structure. The beamless structure occupies a higher market share and is relatively mature in configuration, while the beamed structure occupies a smaller market share, but there is still a certain demand.

[0003] The fully liquid-connected double-disc floating platform is completely different from the traditional floating platform (mainly referring to the assembled aluminum floating platform and the single-disc steel floating platform). The aluminum floating platform must have a beam structure to build the overall structure of the floating platform; and although the single-disc steel floating platform does not have a beam structure on the outside, various mechanical supports are welded inside its buoyancy compartment during construction, and these support structures are composed of many long and short beams. Therefore, the traditional floating platform structure cannot be separated from the support of beams. However, the fully liquid-connected floating platform is different in that the floating platform as a whole is composed of several three-dimensional cubic pontoon modules connected by bolts at the spatial level (three-dimensional space), and each pontoon module is filled with a metal reinforcement structure inside according to a unified standard, so that the pontoon has a relatively high strength. Therefore, the pontoon itself is given some functions of the beam, and when they form the floating platform surface, a relatively good stable structure is formed.

[0004] At present, it is known that the existing floating disc has the following practical technical problems:

[0005] The bearing mechanical properties of the supporting beam structure of the floating platform are relatively weak. Most of the fully liquid-connected floating platforms on the market use a "J"-shaped plywood beam and a "J"-shaped support plate. Although this structure plays a certain supporting role for the pontoons on the left and right sides, it is precisely because of these two shoulder supports (or the support plate design) that the connection wing plate at the bottom of the pontoon has an installation conflict with it. Therefore, many manufacturers directly cancel the connection wing plate (angle steel) under the pontoon to facilitate the installation of the "J"-shaped beam. However, in this way, the connection support between the pontoons in three-dimensional space is actually destroyed. From a mechanical point of view, the addition of the "J"-shaped beam makes this place (referring to the junction of the beam and the pontoon) a weak point, because it loses the bolt connection and only has loose support, which in a sense becomes a burden on the floating platform.

[0006] The material of the entire beam is made of thicker (2-3mm) 304 steel plate, which will increase a lot of weight. The beam itself cannot generate buoyancy. The additional weight requires the buoyancy of more than 2.5 times its own weight to be borne by the pontoon. Compared with the beamless floating plate, other technical means are obviously required to increase the buoyancy of the floating plate to balance the weight generated by the beam in order to meet the design requirements. This is also a technical difficulty currently faced by the fully liquid-connected floating plate.

[0007] Another type is the box-beam structural design, which is actually a smaller version of a pontoon. The cross-section of the beam structure (excluding the connecting wing plate) is 120mm×120mm, which makes it look more like a beam configuration. Its connection method and manufacturing process are exactly the same as those of a pontoon, except that the material thickness has been increased to a certain extent. Generally, the material thickness is 1.8mm. Its connection is exactly the same as that of a pontoon, with both the upper and lower wing plates connected, without destroying the integrity of the floating disk. In addition, the beam forms a closed cavity like a pontoon, so it has a certain buoyancy. However, due to the increase in material thickness and the small cavity space, the buoyancy to weight ratio generated is about 1.2. However, this box-beam is actually still a pontoon, but the material is thicker, so the legs are directly installed at its lower part. The length of the beam is generally limited by the manufacturing equipment. It needs to be bent and formed, and cannot be made too long. It is generally designed to be about 3000mm, the same as the length of the pontoon. In addition, when installing, the beam cannot be separated from the pontoon and installed alone into a mesh structure, which is beneficial to the floating plate to reduce the assistance of scaffolding. The only way is to set up the scaffolding and install it in synchronization with the pontoon according to the plate surface structure. Therefore, the box beam may only be regarded as a nominal beam, and it does not enhance the structure of the floating plate; at the same time, it has a significant and non-negligible weakness, that is, this box beam will inevitably occupy the space of the pontoon, increase the total material and weight of the floating plate, and will definitely lead to a decrease in the floating weight ratio of the floating plate. According to our calculations, a 21m beamless structure with a floating weight ratio of 2.5 will drop to about 2.3 after adding beams in the form of box beams. In this way, the beam will drag down the floating plate. Therefore, this box beam structure has no obvious effect and gain on the floating plate.

[0008] High production cost is a serious defect of the above-mentioned "J"-shaped splint beam and box beam. It is difficult to achieve a good balance between structural strength design and economic value, which is not conducive to the economic benefits and long-term development of the enterprise.

[0009] After searching, the known prior art: a stainless steel fully liquid-connected internal floating roof, application number 202120961928.1, discloses the following technical content: a stainless steel fully liquid-connected internal floating roof, including a floating plate, an internal floating roof structure frame is provided at the bottom of the floating plate, the internal floating roof structure frame includes an outer ring frame, a main beam and a secondary beam, stainless steel elastic seals are installed around the outer ring frame, the main beam is composed of a square tube and a channel steel, the bottom of the main beam is connected to the support legs, the internal floating roof structure frame is provided with a number of standard pontoons near the center, the internal floating roof structure frame is provided with a number of non-standard pontoons near the edge, the standard pontoons and non-standard transfer pontoons are fully welded box structures, the standard pontoons and non-standard transfer pontoons are filled with aluminum honeycomb cores, and the top of the floating plate is provided with an oil measuring hole, a manhole device, an automatic vent valve, a static-conducting cable and two guide wheel devices. It has higher strength, convenient installation and wider application range.

[0010] Known prior art: assembled stainless steel double-disc floating roof, application number 201922267633.X, discloses the following technical content, belongs to the field of petrochemical storage equipment technology, and specifically relates to an assembled stainless steel double-disc floating roof, including a frame and a buoyancy unit; the frame is divided into a plurality of hollow spaces by a main beam, a secondary beam and a ring beam, and the buoyancy unit is filled in the hollow space; by adopting a T-shaped main beam and a secondary beam, liquid infusion is avoided to affect maintenance, and the buoyancy unit made of stainless steel is not easy to burn, avoids liquid corrosion, and greatly improves safety and service life, simple structure, and low manufacturing cost. The use of clamps facilitates the connection between the main beam, the secondary beam and the buoyancy unit; the setting of the sealing strip and the floating plate seal ensures that the entire floating roof is completely sealed and covers the surface of the liquid in the liquid storage tank, which avoids the volatilization loss of the liquid to the greatest extent. The detachable connection structure makes the floating roof reusable. The entire floating roof has a simple structure, is easy to install and operate, and has a good effect in preventing liquid volatilization. Summary of the invention

[0011] The purpose of the present invention is to provide a fully liquid-connected double-disc stainless steel inner floating plate independent beam structure in view of the above problems, so that the entire beam has a certain buoyancy, saving a lot of materials for the floating plate. At the same time, it has a very high structural strength and can be well applied to actual production, creating economic benefits for the enterprise while reducing production costs. By combining the "main and auxiliary beams", the entire beam structure can form an independent network. The beam structure forms a load-bearing and stable structure for the floating plate body at the bottom of the floating plate, and can become the support for the overall installation of the floating plate. This beam structure is suitable for all modular assembled fully liquid-connected floating plates, and different floating plates only need to be properly adjusted according to the spacing of the pontoons.

[0012] To achieve the above object, the technical solution adopted by the present invention is:

[0013] Full liquid-contact double-disk stainless steel internal floating roof independent beam structure, including an outer ring beam in a circular ring structure. Inside the outer ring beam, multiple main beams and secondary beams for carrying floating boxes are arranged vertically and horizontally. Floating boxes are detachably connected to the rectangular frame formed by the main beams and secondary beams. The main beams and secondary beams are hollow sealed structures with buoyancy. The main beams are arranged horizontally and a first mounting member for connecting the floating boxes is provided at the top of the main beams. The main beams and the first mounting members are of welded structure and form a continuous equidistant welded arrangement inside the outer ring beam. The secondary beams are arranged longitudinally and a third mounting member for connecting the floating boxes is provided at the top of the secondary beams. The secondary beams and the third mounting members are of welded structure and form a discontinuous non-equidistant arrangement inside the outer ring beam.

[0014] As a further improvement of the above solution, a plurality of legs are arranged around the bottom circumference of the outer ring beam.

[0015] As a further improvement of the above solution, the first mounting member is in a sheet-like structure provided with a plurality of mounting holes.

[0016] As a further improvement of the above solution, a second mounting member for installing one end of the secondary beam is provided on the side of the main beam.

[0017] As a further improvement of the above solution, the second mounting member is in a bent plate-like structure.

[0018] As a further improvement of the above solution, the third mounting member is in a U-shaped structure with mounting holes.

[0019] As a further improvement of the above solution, mounting plates in a U-shaped plate-like structure are provided at the ends of the main beams and secondary beams.

[0020] As a further improvement of the above solution, the main beams and secondary beams are square tubular structures made of stainless steel material.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] Both the main beams and secondary beams adopt hollow sealed structures, which can become buoyancy bodies after being sealed, thus minimizing the load of their own weight on the buoyancy of the floating roof to the greatest extent.

[0023] According to the structural characteristics of the fully liquid-contacted floating platform, the beam structure is set as "main beam + sub-beam". Along the direction of the head-to-tail connection of multiple main beams, the main beam and the first mounting part are welded structures and form a continuous equidistant welding arrangement in the outer ring beam, so that the main beam can carry more loads, balancing the shortcomings of the hollow sealed structure of the main beam and the sub-beam. The main beam is used as a main connection and load-bearing structure to form a large frame. The sub-beam is connected across the main beams to increase the density and overall strength of the beam. The connection parts of the main beam and the sub-beam with the pontoon are slightly different. The main beam is connected to the pontoon continuously because it is on the continuous connection seam. The sub-beam is connected to the pontoon continuously because the pontoon is staggered up and down, and a continuous connection seam cannot be formed, so it is a spanning intermittent connection. In short, through the interlaced configuration of the main beam and the sub-beam, the continuous welding arrangement presented by the main beam and the first mounting part can better enhance the load on the pontoon and achieve a good balance between the structural strength design and the economic value.

[0024] Independently formed into a network, with a stable structure, the beam structure can become a platform support for the installation of the entire floating platform. Since the main beam and the auxiliary beam can form a truly independent structural platform with considerable strength and stability, when installing the floating platform, the floating platform beam structure is first built up to form a network, which becomes a platform support for the entire floating platform installation. In this way, in the subsequent installation process of the floating platform (such as pontoons, accessories, etc.), there is no need to build additional auxiliary brackets, thereby greatly saving manpower, material resources, and financial resources, shortening the installation period, and ensuring the installation quality.

[0025] High versatility and compatibility. This application integrates the structural characteristics of the fully liquid-connected floating plate and designs a beam structure that is universal for any fully liquid-connected stainless steel floating plate. The specific size only needs to be adjusted accordingly according to the diameter of the floating plate.

[0026] This independent beam structure is composed of high-strength, hollow square tubes sealed at both ends as the main beam structure, and is combined with various attachments as an integral design. This structure is completely different from the pontoon. It is an independent structure that can be installed and built independently. It does not need to be installed at the same time as the pontoon to become an independent frame structure. The so-called traditional beam structure cannot be installed independently and must be installed together with the pontoon. This structure itself has high strength, load-bearing capacity, and support function. It can form an installation platform to assist in the subsequent installation of the pontoon. The traditional beam structure basically has no supporting function and is mostly designed as a connecting part. This structure itself has buoyancy, which reduces the loss of buoyancy of the pontoon. The traditional beam structure itself does not have buoyancy and can only rely on the buoyancy of the pontoon, which increases the buoyancy loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0028] Figure 2 The figure is a schematic diagram of the three-dimensional structure of the present invention without the buoyancy box.

[0029] Figure 3 The outer ring beam position of the present invention ( Figure 1 A partial enlarged schematic diagram (position A in the middle).

[0030] Figure 4 It is a schematic diagram of the three-dimensional structure at the position of the first mounting piece of the present invention.

[0031] Figure 5 It is a top view structural schematic diagram of the welding relationship between the main beam, the auxiliary beam and the floating plate of the present invention.

[0032] The text labels in the figure indicate: 1. pontoon; 2. outrigger; 3. outer ring beam; 4. main beam; 5. secondary beam; 401. first mounting part; 402. second mounting part; 501. third mounting part. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the technical solution, the present invention is described in detail below in conjunction with embodiments. The description in this section is only exemplary and explanatory and should not have any limiting effect on the scope of protection of the present invention.

[0034] like Figure 1-5 As shown, the specific scheme of this embodiment is: a fully liquid-connected double-disc stainless steel inner floating disc independent beam structure, including an outer ring beam 3 in the shape of a circular ring structure, a plurality of main beams 4 and sub-beams 5 for supporting the pontoon 1 are criss-crossedly arranged in the outer ring beam 3, and the pontoon 1 is detachably connected and arranged on the rectangular frame formed by the main beam 4 and the sub-beam 5, the main beam 4 and the sub-beam 5 are hollow sealed structures with buoyancy, the main beam 4 is arranged horizontally and a first mounting member 401 for connecting the pontoon 1 is arranged on the top thereof, the main beam 4 and the first mounting member 401 are welded structures and form a continuous equidistant welding arrangement in the outer ring beam 3, the sub-beam 5 is arranged longitudinally and a third mounting member 501 for connecting the pontoon 1 is arranged on the top thereof, the sub-beam 5 and the third mounting member 501 are welded structures and form a discontinuous non-equidistant arrangement in the outer ring beam 3.

[0035] like Figure 1 As shown, as a preferred embodiment of the above embodiment, a plurality of legs 2 are arranged around the bottom circumference of the outer ring beam 3 .

[0036] like Figure 1 As shown, as a preferred embodiment of the above embodiment, the first mounting member 401 is a sheet-like structure provided with a plurality of mounting holes.

[0037] like Figure 1 As shown, as a preferred embodiment of the above embodiment, a second mounting member 402 for mounting one end of the secondary beam 5 is provided on the side of the main beam 4 .

[0038] As Figure 1 shown, as a preferred embodiment of the above, the second mounting member 402 has a bent plate-like structure.

[0039] As Figure 1 shown, as a preferred embodiment of the above, the third mounting member 501 has a U-shaped structure with mounting holes.

[0040] As Figure 1 shown, as a preferred embodiment of the above, mounting plates with a U-shaped plate-like structure are provided at the ends of the main beam 4 and the secondary beam 5.

[0041] As Figure 1 shown, as a preferred embodiment of the above, the main beam 4 and the secondary beam 5 are square tubular structures made of stainless steel.

[0042] For the connection part between the main beam 4 and the secondary beam 5 and the floating box 1, each connecting member is welded to the upper plane of a 120×120 square tube to form an inseparable whole with the square tube (as shown in the attached drawings of the specification). When connecting, just corresponding to the installation positions of each beam, connect with bolts to the holes of the floating box 1. Whether it is the main beam 4 or the secondary beam 5, the density of the installation holes is the same as that of the floating box 1. The hole pitch of the connection holes of the floating box 1 with the beam structure floating tray is designed to be 132 mm (short distance, high density). Therefore, the hole pitch of all the holes on the beams is also 132 mm. This kind of bolt connection with short distance and high density ensures a firm and reliable combination between the beam and the floating tray. Figure 4 shown), when connecting, just corresponding to the installation positions of each beam, connect with bolts to the holes of the floating box 1. Whether it is the main beam 4 or the secondary beam 5, the density of the installation holes is the same as that of the floating box 1. The hole pitch of the connection holes of the floating box 1 with the beam structure floating tray is designed to be 132 mm (short distance, high density). Therefore, the hole pitch of all the holes on the beams is also 132 mm. This kind of bolt connection with short distance and high density ensures a firm and reliable combination between the beam and the floating tray.

[0043] The connection structure form of the main beam 4 is different from that of the secondary beam 5. The specific dimensions of the first mounting member 401 can be designed to be 260 mm high × 1.2 mm thick. The main beam 4 is welded to the first mounting member 401 to form a "zhan" - shaped cross-section, increasing the stress-bearing cross-section.

[0044] For the strength calculation of the beam, according to the strength calculation formula: б = F÷s, where F is the minimum force suffered when the material yields, which is the average gravity of the floating tray borne by the beam, to evaluate how much the failure strength that the gravity (the force suffered by the floating tray in the normal state) can cause, and make a comparison with the yield strength it can bear.

[0045] Taking a 22.6 m tray as an example, its total weight is 15102 kg, the total length of the beam is 227.36 m, and the average weight of the floating tray borne by the beam is 15102 kg÷227.36 m = 66.42 kg / m; the legs 2 on the beam are set at 3 m, that is to say, the total load on the beam between two legs 2 is 66.42 kg / m×3 m = 199.26 kg. Convert it to F. According to F = G = mg, where g is the gravitational constant g = 9.8 N / kg, it can be obtained that F = 199.26 kg×9.8 N / kg = 1953 N;

[0046] In the above formula, s is the cross-sectional area (square meters) of the load-bearing material. 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 plywood. The cross-sectional area of ​​the beam formed by their combination 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 In summary, both the main beam 4 and the auxiliary beam 5 have good strength, and when they are combined and interconnected, their stability is also very good.

[0047] It should be noted that, in this article, the terms include, contain or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Specific examples are used in this article to illustrate the principle and implementation of the technical solution of the present invention. The above examples are only used to help understand the method of the present invention and its core idea. The above is only a preferred implementation of the present invention. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements, modifications or changes can be made, and the above technical features can also be combined in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the invention to other occasions without improvement, should be regarded as the protection scope of the present invention.

Claims

1. Fully liquid-connected double-disc stainless steel inner floating plate independent beam structure, characterized by: It includes an outer ring beam (3) in a circular ring structure. A plurality of main beams (4) and secondary beams (5) are arranged vertically and horizontally inside the outer ring beam (3). A floating box (1) is detachably connected to the rectangular frame formed by the main beams (4) and the secondary beams (5). The main beams (4) and the secondary beams (5) are hollow sealed structures with buoyancy. The main beams (4) are arranged horizontally and a first mounting member (401) for connecting the floating box (1) is provided at the top thereof. The main beam (4) and the first mounting member (401) are of a welded structure and form a continuous equidistant welding arrangement inside the outer ring beam (3). The secondary beams (5) are arranged vertically and a third mounting member (501) for connecting the floating box (1) is provided at the top thereof. The secondary beam (5) and the third mounting member (501) are of a welded structure and form a discontinuous non-equidistant arrangement inside the outer ring beam (3). The first mounting member (401) is a sheet-like structure provided with a plurality of mounting holes. The third mounting member (501) is a C-shaped structure with mounting holes. The main beams (4) and the secondary beams (5) are square tubular structures made of stainless steel. Mounting plates in a C-shaped plate structure are provided at the ends of the main beams (4) and the secondary beams (5).

2. The fully liquid-connected double-disc stainless steel inner floating disc independent beam structure according to claim 1 is characterized in that: A plurality of legs (2) are arranged in a circular manner around the bottom of the outer ring beam (3).

3. The fully liquid-connected double-disc stainless steel inner floating disc independent beam structure according to claim 1 is characterized in that: A second mounting member (402) for mounting one end of the secondary beam (5) is provided on the side of the main beam (4).

4. The fully liquid-connected double-disc stainless steel inner floating disc independent beam structure according to claim 3 is characterized in that: The second mounting member (402) is in a bent plate-like structure.

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