Double-layer sealed full-liquid-receiving floating disc

Abstract

The utility model discloses a double-layer sealed full-liquid-receiving floating disc, and relates to the technical field of inner floating discs for storage tanks, in particular to the double-layer sealed full-liquid-receiving floating disc. The connecting structure has the advantages of being high in connecting strength, long in service life and stable in operation. The double-layer sealing full-liquid-receiving floating disc comprises a plurality of buoyancy units. Every two adjacent buoyancy units are connected through a connecting beam. The buoyancy unit comprises a buoyancy unit box and upper and lower layers of buoyancy units arranged in the buoyancy unit box; the upper-lower layer buoyancy unit comprises an upper layer buoyancy unit and a lower layer buoyancy unit which are connected up and down; the lower-layer buoyancy unit comprises a first connecting plate, a second connecting plate and a lower-layer prefabricated honeycomb fixedly connected between the first connecting plate and the second connecting plate; the upper-layer buoyancy unit comprises a third connecting plate and a lower-layer prefabricated honeycomb fixedly connected to the lower surface of the third connecting plate; the second connecting plate and the third connecting plate are both hermetically connected with the buoyancy unit box; the ratio of the height of the lower-layer buoyancy unit to the height of the upper-layer buoyancy unit to the height of the lower-layer buoyancy unit is 2: 3.

Description

Technical Field

[0001] The present application belongs to the technical field of inner floating plates for storage tanks, and in particular relates to a double-layer sealed fully liquid-contacting floating plate. Background Art

[0002] The floating plate device is widely used in oil storage, which can effectively reduce the evaporation loss of oil and gas in the storage tank. The floating plate is placed inside the storage tank and floats on the surface of the oil. When the oil level in the oil tank rises and falls due to filling and discharging, the floating plate can always be attached to the oil surface, thereby ensuring that the oil never comes into contact with the air and causes danger. In addition, when a fire occurs or the storage tank is severely impacted, the floating plate can isolate the flame and keep the oil surface stable to protect the stored oil. At present, the most widely used in the world is the self-floating assembled internal floating plate, which realizes the modularization of the floating plate parts, which is conducive to manufacturing, transportation, and assembly. At present, most of the floating plates use a honeycomb structure inside to reduce weight while improving their own strength and buoyancy. For this reason, the internal floating plate is widely used in the storage industry of volatile liquid media such as petroleum.

[0003] At present, the floating plates used in China are mainly buoy-type floating plates and fully-connected floating plates. For traditional buoy-type floating plates, the wall thickness of the buoy is relatively thin, welding is difficult, and the tensile strength and impact resistance are poor. In addition, there is a large space between the buoy-type floating plate and the oil liquid surface. After the oil and gas mix, it will not only corrode the floating plate, but also have the risk of combustion and explosion, the maintenance risk is relatively high, and the safety and reliability are also low. Compared with the buoy-type floating plate, the fully-connected floating plate has a comprehensive technical improvement. This type of equipment has multiple buoyancy units, and a honeycomb partition is generally set inside, and the oil and gas space is eliminated. It has the advantages of high structural strength, stable operation, and high safety.

[0004] Although the fully wetted floating plate has many advantages, there are still some problems with this type of equipment:

[0005] 1) The buoyancy unit is welded by traditional welding process, which is difficult to weld and the quality of weld is difficult to guarantee. If welding defects occur, there will be a risk of oil leakage;

[0006] 2) The float is composed of buoyancy units, and only about 40% of each buoyancy unit is immersed in oil. However, when the part of the buoyancy unit body that contacts the oil is damaged, the oil penetrates into the buoyancy unit, causing the entire internal honeycomb structure to be filled with oil and further oil and gas leakage, which is less safe and prone to accidents.

[0007] 3) The buoyancy units are simply spliced ​​and assembled, with poor mechanical properties. They are prone to cracking when impacted, and oil is prone to leakage, causing the floating plate to sink. Utility Model Content

[0008] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of the present application is to provide a double-layer sealed fully liquid-contacting floating plate, which has the advantages of higher connection strength, longer service life and more stable operation.

[0009] In order to achieve the above purpose, the technical solution adopted by this application is:

[0010] A double-layer sealed fully liquid-contacted floating plate comprises a plurality of buoyancy units; two adjacent buoyancy units are connected by a connecting beam; the buoyancy unit comprises a buoyancy unit box and upper and lower buoyancy units arranged in the buoyancy unit box; the upper and lower buoyancy units comprise an upper buoyancy unit and a lower buoyancy unit connected up and down; the lower buoyancy unit comprises a first connecting plate, a second connecting plate and a lower prefabricated honeycomb fixedly connected between the first connecting plate and the second connecting plate; the upper buoyancy unit comprises a third connecting plate and a lower prefabricated honeycomb fixedly connected to the lower surface of the third connecting plate; the upper prefabricated honeycomb is fixedly connected to the second connecting plate; the second connecting plate and the third connecting plate are both sealed and connected to the buoyancy unit box; the ratio of the height of the lower buoyancy unit to the height of the upper and lower buoyancy units is 2:3.

[0011] Furthermore, the second connecting plate and the third connecting plate are fixed and sealed to the buoyancy unit box by a friction stir welding process.

[0012] Furthermore, the first connecting plate, the second connecting plate and the third connecting plate are all stainless steel plates.

[0013] Furthermore, the height of the buoyancy unit box is greater than the height of the upper and lower buoyancy units; bolt holes are provided at the upper ends of the side walls of the buoyancy unit box; and two adjacent buoyancy unit boxes are fixedly connected to the connecting beam by bolts.

[0014] Furthermore, the connecting beam is a T-beam.

[0015] Compared with the prior art, the beneficial effects of this application are:

[0016] 1. The present application separates the part that accounts for about 40% of the pontoon unit and directly contacts the oil from the upper part using a plate. When the part that contacts the oil is damaged, the oil will only penetrate into the lower part of the pontoon unit and not the upper part, thereby ensuring that the oil tank unit still has sufficient buoyancy support to prevent sinking accidents, and the upper part not being immersed in oil can also prevent oil and gas leakage.

[0017] 2. The second connecting plate and the third stainless steel plate are welded to the buoyancy unit box respectively by using the stir friction welding process. The welding difficulty is greatly reduced compared with the traditional welding process, and the weld quality is significantly improved compared with the traditional welding process. The weld performance is close to that of the parent material, which can effectively improve its mechanical properties. The probability of weld tearing of the floating plate is greatly reduced, and the service life is longer and the reliability is higher.

[0018] 3. Compared with traditional welding processes, stir friction welding does not require surface pretreatment of the weldment before welding, does not require filling materials and protective gas during welding, and does not generate arc radiation and smoke. It has the advantages of simple welding process, high dimensional accuracy of weldment, no need for protective atmosphere, wide application range, and environmentally friendly welding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the double-layer sealed full-liquid floating plate of the present application;

[0020] Figure 2 is a schematic diagram of the exploded structure of the buoyancy unit in this application;

[0021] Figure 3 It is the processing flow chart of this application;

[0022] Figure 4 It is a process flow chart of the friction stir welding process adopted in this application. DETAILED DESCRIPTION

[0023] The present application is described in detail below with reference to the accompanying drawings.

[0024] Reference Figure 1 and Figure 2 The present application provides a double-layer sealed fully liquid-contacting floating platform, including a plurality of buoyancy units 1 , and two adjacent buoyancy units 1 are connected by a connecting beam 9 .

[0025] The buoyancy unit 1 includes a buoyancy unit box 3 and upper and lower buoyancy units 4 arranged in the buoyancy unit box 3. The buoyancy unit box 3 is a rectangular box with upper and lower openings. The height of the buoyancy unit box 3 is greater than the height of the upper and lower buoyancy units 4, and bolt holes are provided at the upper ends of the side walls of the buoyancy unit box 3. Two adjacent buoyancy unit boxes 3 are fixedly connected to a connecting beam 9 by bolts 7 and nuts 8. The connecting beam 9 is a T-beam.

[0026] The upper and lower buoyancy units 4 include an upper buoyancy unit 5 and a lower buoyancy unit 6 connected up and down. The lower buoyancy unit 6 includes a first connecting plate 61, a second connecting plate 62, and a lower prefabricated honeycomb 63 fixedly connected between the first connecting plate 61 and the second connecting plate 62. The upper buoyancy unit 5 includes a third connecting plate 51 and an upper prefabricated honeycomb 52 fixedly connected to the lower surface of the third connecting plate. The lower end of the upper prefabricated honeycomb 52 is fixedly connected to the second connecting plate 62. The first connecting plate 61, the second connecting plate 62, and the third connecting plate 52 are all stainless steel plates. The second connecting plate 62 and the third connecting plate 52 are fixed and sealed to the buoyancy unit box 3 by a stir friction welding process. The ratio of the height of the lower buoyancy unit 6 to the height of the upper and lower buoyancy units 64 is 2:3.

[0027] Reference Figure 3 and Figure 4 The present invention discloses a double-layer sealed fully liquid-contacting floating plate, and the processing process includes the following steps:

[0028] 1) Preparation of the lower buoyancy unit 6. Glue is applied on the surfaces of the first connecting plate 61 and the second connecting plate 62, and the lower prefabricated honeycomb 63 is adhered between the first connecting plate 61 and the second connecting plate 62. Then, a press is used to press the first connecting plate 61 and the second connecting plate 62, so that the lower prefabricated honeycomb 63 and the first connecting plate 61 and the second connecting plate 62 are shaped.

[0029] 2) Preparation of the upper buoyancy unit 51. Glue is applied to the upper surface of the second connecting plate 62 and the lower surface of the third connecting plate 51 at the upper end of the lower buoyancy unit 6 prepared in step 1), and the upper prefabricated honeycomb 52 is bonded between the two plates. Similarly, a press is used to apply pressure to the upper surface of the third connecting plate 51 so that the upper prefabricated honeycomb 52, the second connecting plate 62 and the third connecting plate 51 are shaped.

[0030] 3) Preparation of the whole buoyancy unit 1. The upper and lower buoyancy units 4 obtained in step 2) are placed in the prefabricated buoyancy unit box 3, and the buoyancy unit box 3 and the second connecting plate 62 and the buoyancy unit box 3 and the third connecting plate 52 are welded along the circumferential direction using a stir friction welding process to achieve fixation and sealing. Figure 4 Taking welding of the second connecting plate 62 as an example, first position the buoyancy unit box 3 and the second connecting plate 62, and then use the stirring head 4 to perform friction stir welding.

[0031] 4) Connection of the buoyancy unit 1 . Bolt holes are arranged on the side of the buoyancy unit box 3 , and two adjacent buoyancy unit boxes 3 are connected to the T-beam 5 by bolts 6 and are locked by nuts 7 .

Claims

1. A double-layer sealed fully liquid-contacting floating plate, characterized in that: A plurality of buoyancy units; two adjacent buoyancy units are connected by a connecting beam; the buoyancy unit comprises a buoyancy unit box and upper and lower buoyancy units arranged in the buoyancy unit box; the upper and lower buoyancy units comprise an upper buoyancy unit and a lower buoyancy unit connected up and down; the lower buoyancy unit comprises a first connecting plate, a second connecting plate and a lower prefabricated honeycomb fixedly connected between the first connecting plate and the second connecting plate; the upper buoyancy unit comprises a third connecting plate and a lower prefabricated honeycomb fixedly connected to the lower surface of the third connecting plate; the upper prefabricated honeycomb is fixedly connected to the second connecting plate; the second connecting plate and the third connecting plate are both sealed and connected to the buoyancy unit box; the ratio of the height of the lower buoyancy unit to the height of the upper and lower buoyancy units is 2:

3.

2. The double-layer sealed fully liquid-contacting floating plate according to claim 1, characterized in that: The second connecting plate and the third connecting plate are both fixed and sealed to the buoyancy unit box by a friction stir welding process.

3. The double-layer sealed fully liquid-contacting floating plate according to claim 2, characterized in that: The first connecting plate, the second connecting plate and the third connecting plate are all stainless steel plates.

4. The double-layer sealed fully liquid-contacting floating plate according to claim 3 is characterized in that: The height of the buoyancy unit box is greater than the height of the upper and lower buoyancy units; bolt holes are provided at the upper ends of the side walls of the buoyancy unit box; and two adjacent buoyancy unit boxes are fixedly connected to the connecting beam by bolts.

5. The double-layer sealed fully liquid-contacting floating plate according to claim 4, characterized in that: The connecting beam is a T-beam.

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