Composite material external floating roof and preparation method thereof

Abstract

The invention discloses a composite material external floating roof and a preparation method thereof, and relates to the technical field of floating roof devices, the composite material external floating roof comprises a floating disc body, and the floating disc body comprises a static electricity conduction anti-corrosion layer, a lower glass fiber reinforced plastic structure layer, a honeycomb core layer, an upper glass fiber reinforced plastic structure layer, a static electricity conduction flame-retardant layer and an anti-aging layer which are sequentially laid layer by layer from bottom to top; the lower surface of the floating disc body is a plane used for being attached to and making contact with the liquid surface, and the upper surface of the floating disc body is provided with an annular stepped groove structure used for collecting rainwater. A water outlet communicated with the annular stepped groove structure is formed in the middle of the bottom surface of the floating disc body; and the floating disc peripheral side sealing structure is arranged on the peripheral side of the floating disc body in a sleeving mode so as to block a gap between the peripheral side of the floating disc body and the inner wall of the storage tank. By means of the composite material layer laying design, the mass can be greatly reduced on the premise that the structural strength is ensured, and the buoyancy and the anti-pressure capacity are effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of floating roof devices, and in particular to a composite material external floating roof and a preparation method thereof. Background Art

[0002] For large storage tanks for petroleum or chemical storage, due to the presence of volatile media, as environmental protection management work is gradually strengthened, it is particularly important to carry out VOCs emission management for large storage tanks for oil depots and chemical storage of volatile media. Among them, the fully liquid-contacted floating roof is one of the effective devices to prevent the emission of volatile liquid VOCs, which has many advantages. However, the floating plate structure of the existing fully liquid-contacted floating roof mostly adopts a stainless steel structure floating plate to increase the structural rigidity, corrosion resistance and oxidation resistance; although the stainless steel floating plate has high strength, it will inevitably increase the overall weight of the floating roof, resulting in a high ratio of gravity to buoyancy, poor pressure resistance, and inflexible lifting and lowering. In addition, the larger diameter of the stainless steel structure floating plate will deform greatly at high temperatures, which is prone to jamming and sealing difficulties.

[0003] Therefore, how to propose a composite material external floating roof and a preparation method thereof, which can greatly reduce the weight while ensuring the structural strength through the composite material layer laying design, and effectively improve the buoyancy and pressure resistance is a problem that technical personnel in this field urgently need to solve. Summary of the invention

[0004] In view of this, the present invention proposes a composite material external floating roof and a preparation method thereof, aiming to solve the technical problems of the above-mentioned traditional stainless steel structure floating plate having heavy deadweight, relatively high gravity buoyancy and poor pressure resistance.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] In one aspect, the present invention provides a composite material external floating roof, comprising:

[0007] The floating plate body comprises a static conductive anti-corrosion layer, a lower fiberglass structural layer, a honeycomb core layer, an upper fiberglass structural layer, a static conductive flame retardant layer and an anti-aging layer which are sequentially laid from bottom to top; the lower surface of the floating plate body is a plane for contacting the liquid surface, and the upper surface thereof has an annular stepped groove structure for collecting rainwater; a drainage port connected to the annular stepped groove structure is provided in the middle of the bottom surface of the floating plate body;

[0008] The floating plate peripheral sealing structure is sleeved on the outer peripheral side of the floating plate body to seal the gap between the outer peripheral side of the floating plate body and the inner wall of the storage tank.

[0009] The composite material external floating roof of the present invention adopts a fully composite material structure, with a honeycomb core layer as a buoyancy functional layer; the honeycomb core layer is sandwiched between the upper fiberglass structural layer and the lower fiberglass structural layer as a structural reinforcement layer, and together with the honeycomb core layer, a buoyancy unit is formed, thereby achieving the purpose of lightweight design; the durability and safety performance can be improved by laying an electrostatic retardant layer and an anti-aging layer on the upper surface layer of the upper fiberglass structural layer; the safety performance and anti-corrosion performance are further improved by laying an electrostatic anti-corrosion layer on the lower surface layer of the lower fiberglass structural layer. The bottom end surface of the floating plate body is a plane, which can achieve full liquid contact; the annular stepped groove structure on the upper surface of the floating plate body is used to collect rainwater, and the rainwater can be discharged from the drain outlet; the annular stepped groove structure on the upper surface of the floating plate body further increases the buoyancy, achieving a higher gravity-buoyancy ratio, making the overall structure of the external floating roof more stable, more resistant to pressure, and lighter and more flexible to lift.

[0010] As a further improvement of the above technical solution, the honeycomb core layer includes a central honeycomb core panel, an annular filling body and an annular honeycomb core panel; the annular filling body is arranged on the periphery of the central honeycomb core panel, and the annular honeycomb core panel is arranged on the periphery of the annular filling body; the lower surfaces of the central honeycomb core panel, the annular filling body and the annular honeycomb core panel are flush and their thickness increases successively, and the upper surfaces of the three together constitute the annular stepped groove structure.

[0011] The beneficial effects of the above technical solution are: the honeycomb core layer adopts a stepped modular design, which is easy to assemble and manufacture, and the upper surface with an annular stepped groove structure can be conveniently constructed through the central honeycomb core panels, annular filling bodies and annular honeycomb core panels of different thicknesses. It is similar to a boat-shaped design, which is used to collect rainwater while also increasing buoyancy and pressure resistance.

[0012] As a further improvement of the above technical solution, the honeycomb core layer also includes an annular filling body 2; there are multiple annular honeycomb core panels, and the multiple annular honeycomb core panels are concentrically nested from the inside to the outside and the thickness increases successively; the annular filling body 2 is concentrically nested between any two adjacent annular honeycomb core panels, and the bottom end surfaces of the annular honeycomb core panel and the annular filling body 2 are flush; the thickness of the annular filling body 2 on both radial sides is the same as the thickness of the adjacent annular honeycomb core panels, and the top surface of the annular filling body 2 is an inclined surface inclined from the outside to the inside.

[0013] The beneficial effect of the above technical solution is: by adapting and nesting the annular filling body 2 between two adjacent annular honeycomb core panels, and designing the top surface of the annular filling body 2 as an inclined surface to connect the two adjacent annular honeycomb core panels with a thickness difference, it is convenient to evenly lay the static conductive fire retardant layer and the anti-aging layer on the top surface of the honeycomb core layer in the later stage, and make the inclination from the overall edge to the center of the external floating roof meet the requirements, so that the rainwater on the external floating roof can be smoothly gathered and discharged to the center.

[0014] As a further improvement of the above technical solution, it also includes a foam weir plate, which is arranged at the top of the floating plate body and close to the outer peripheral side of the floating plate body.

[0015] The beneficial effect of the above technical solution is that the foam weir plate is used to block the foam liquid sprayed out when a fire occurs in the floating roof tank.

[0016] As a further improvement of the above technical solution, the foam weir plate is a composite sandwich panel.

[0017] The beneficial effect of the above technical solution is that the foam weir plate is made of composite sandwich panels, which increases the thickness of the plate while reducing the weight, and can improve the rigidity and stability of the external floating roof.

[0018] As a further improvement of the above technical solution, the foam weir plate is arranged to extend circumferentially along the floating plate body to form an annular enclosure to construct a fire extinguishing foam storage area between the outer plate surface of the foam weir plate and the inner wall surface of the corresponding storage tank.

[0019] The beneficial effects of the above technical solution are: the foam weir plate is designed to be annular, and a fire-extinguishing foam storage area can be constructed between the outer plate surface of the foam weir plate and the inner wall surface of the external floating roof tank, so that the foam liquid sprayed from the fire extinguisher on the top of the tank can be gathered in the foam storage area to cover the gap between the external floating roof and the inner wall surface of the tank, so that the volatile gas in the tank is isolated from the air, thereby improving the fire extinguishing effect.

[0020] As a further improvement of the above technical solution, it also includes a guide column, a floating roof column and an anti-rotation device; the guide column corresponds to the outer peripheral side of the foam weir plate and vertically slides through the floating plate body to guide the lifting and lowering of the floating plate body; the floating roof column corresponds to the inner peripheral side of the foam weir plate and is vertically fixed to the lower end of the floating plate body; the anti-rotation device corresponds to the outer peripheral side of the foam weir plate and vertically slides through the floating plate body.

[0021] The beneficial effect of the above technical solution is that the guide column is arranged on the outer peripheral side of the foam weir plate near the edge of the floating plate body, which can effectively control the gap between the outer peripheral side of the floating plate body and the inner wall of the external floating roof tank while playing the role of lifting and guiding the floating plate body. When the floating plate body gradually descends, the lower end of the floating roof support can abut against the inner bottom surface of the external floating roof tank to support the floating plate body and form a safe maintenance space between the floating plate body and the inner bottom surface of the external floating roof tank.

[0022] As a further improvement of the above technical solution, it also includes a static electricity lead-out device, an automatic ventilation valve device and a manhole ladder assembly; the static electricity lead-out device electrically connects the static electricity conductive anti-corrosion layer and the static electricity conductive flame retardant layer to lead out the static electricity accumulated on the static electricity conductive anti-corrosion layer and the static electricity conductive flame retardant layer; the automatic ventilation valve device is installed on the floating plate body; the manhole ladder assembly includes a manhole and a ladder; the manhole is arranged on the floating plate body, and the ladder is installed at the lower end of the floating plate body and corresponds to the manhole.

[0023] The beneficial effects of the above technical solution are: the static conductive anti-corrosion layer in contact with the liquid surface is used to gather static electricity on the surface of the oil, and the static conductive flame retardant layer in contact with the external air is used to gather static electricity in the external atmosphere. The static electricity extraction device can effectively conduct away the static electricity on the upper and lower surface layers of the floating plate body by electrically connecting the static conductive anti-corrosion layer and the static conductive flame retardant layer to prevent electric sparks from causing fires. The automatic vent valve device can be used to discharge volatile gases above the liquid surface of the external floating roof tank, and can be opened for ventilation when the floating plate body drops to the lowest point to facilitate the smooth discharge of liquid below the floating plate body in the tank. The manhole is used for maintenance personnel to enter the area below the floating plate body in the tank for operation, and the straight ladder can facilitate maintenance personnel to climb up and down.

[0024] As a further improvement of the above technical solution, an anti-backflow valve is installed on the floating plate body corresponding to the drain outlet.

[0025] The beneficial effect of the above technical solution is that the anti-backflow valve is used to control the rainwater collected in the annular stepped groove to be discharged downward from the drain outlet, and prevent the liquid from backflowing upward from the drain outlet.

[0026] Another aspect of the present invention provides a method for preparing a composite material external floating roof, comprising the following steps:

[0027] Step 1: Using honeycomb panels of different thicknesses to make a honeycomb core layer, so that the bottom surface of the honeycomb core layer is a flat surface, and the top surface of the honeycomb core layer is a circular stepped concave surface;

[0028] Step 2: coating the interface adhesive on the upper and lower surfaces of the honeycomb core layer, and laying the upper fiberglass structural layer on the upper surface of the honeycomb core layer by hand lay-up molding process, and laying the lower fiberglass structural layer on the lower surface of the honeycomb core layer by hand lay-up molding process;

[0029] Step 3: Using a spraying process to sequentially manufacture a static conductive and flame retardant layer and an anti-aging layer on the upper surface of the upper FRP structural layer;

[0030] Step 4: Use the spraying process to make an electrostatically conductive anti-corrosion layer on the lower surface of the lower fiberglass structural layer.

[0031] It can be seen from the above technical solutions that, compared with the prior art, the present invention discloses a composite material external floating roof and a preparation method thereof, which has the following advantages and beneficial effects:

[0032] 1. The external floating roof of the present invention is made of all-composite material, and the upper and lower layers of fiberglass structural layers are bonded to the upper and lower surfaces of the honeycomb core layer, which plays a reinforcing role. The overall structure is light in weight and high in strength; and by designing the lower surface of the floating plate body as a plane, a full liquid surface contact type external floating roof is constructed.

[0033] 2. The foam weir plate of the present invention is made of a composite material sandwich panel, which increases the thickness and reduces the weight of the body, thereby achieving the effect of improving rigidity and stability.

[0034] 3. The present invention provides static conductive layers on both the upper and lower sides of the honeycomb core layer, and conducts away static electricity through a static electricity conduction device, which can effectively avoid fires caused by static electricity sparks and improve safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0036] Figure 1 A vertical cross-sectional view of the overall structure of a composite material external floating roof according to the present invention;

[0037] Figure 2 The present invention Figure 1 A schematic diagram of the structure enlargement in the middle;

[0038] In the figure: 1. floating plate body; 11. honeycomb core layer; 111. central honeycomb core plate; 1111. drain outlet; 112. annular filling body one; 113. annular honeycomb core plate; 114. annular filling body two; 1141. inclined surface; 12. lower glass fiber reinforced plastic structure layer; 13. upper glass fiber reinforced plastic structure layer; 14. anti-backflow valve; 15. annular rain shield; 2. sealing structure around the floating plate; 3. foam weir plate; 4. guide column; 5. floating roof support; 6. anti-rotation device; 7. static electricity lead-out device; 8. automatic vent valve device; 9. manhole ladder assembly; 91. manhole; 92. ladder; 10. storage tank. DETAILED DESCRIPTION

[0039] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0040] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] According to an embodiment of the present invention, Figure 1 and Figure 2 As shown, a composite material external floating roof and a preparation method thereof, comprising:

[0044] The floating plate body 1 includes a static conductive anti-corrosion layer, a lower glass fiber reinforced plastic structure layer 12, a honeycomb core layer 11, an upper glass fiber reinforced plastic structure layer 13, a static conductive anti-flammable layer and an anti-aging layer which are sequentially laid from bottom to top; the lower surface of the floating plate body 1 is a plane for contacting the liquid surface, and the upper surface thereof has an annular stepped groove structure for collecting rainwater; a drainage port 1111 communicating with the annular stepped groove structure is provided in the middle of the bottom surface of the floating plate body 1;

[0045] The floating plate peripheral sealing structure 2 is sleeved on the outer peripheral side of the floating plate body 1 to seal the gap between the outer peripheral side of the floating plate body 1 and the inner wall of the storage tank 10 .

[0046] The composite material external floating roof of this embodiment adopts a fully composite material structure, with the honeycomb core layer 11 as a buoyancy functional layer; the honeycomb core layer 11 is sandwiched between the upper glass fiber reinforced plastic structure layer 13 and the lower glass fiber reinforced plastic structure layer 12 as a structural reinforcement layer, and together with the honeycomb core layer 11, a buoyancy unit is formed, thereby achieving the purpose of lightweight design; by laying an electrostatic flame retardant layer and an anti-aging layer on the upper surface layer of the upper glass fiber reinforced plastic structure layer 13, the durability and safety performance can be improved; by laying an electrostatic anti-corrosion layer on the lower surface layer of the lower glass fiber reinforced plastic structure layer 12, the safety performance and anti-corrosion performance are further improved. The bottom end surface of the floating plate body 1 is a plane, which can achieve full liquid contact; the annular stepped groove structure on the upper surface of the floating plate body 1 is used to collect rainwater, and the rainwater can be discharged from the drain outlet 1111; the annular stepped groove structure on the upper surface of the floating plate body 1 further increases the buoyancy, achieving a higher gravity buoyancy ratio, making the overall structure of the external floating roof more stable, more resistant to pressure, and lighter and more flexible to lift.

[0047] Specifically, the sealing structure 2 on the peripheral side of the floating plate can be an annular sealing ring, which is concentrically nested on the outer peripheral side of the floating plate body 1, and its material can be rubber.

[0048] In some embodiments, an annular rain shield 15 is installed on the top surface of the floating platform body 1 close to the outer peripheral side, and the annular rain shield 15 is arranged directly above the sealing structure 2 on the peripheral side of the floating platform.

[0049] In some embodiments, the honeycomb core layer 11 includes a central honeycomb core panel 111, an annular filling body 112 and an annular honeycomb core panel 113; the annular filling body 112 is sleeved on the outer periphery of the central honeycomb core panel 111, and the annular honeycomb core panel 113 is sleeved on the outer periphery of the annular filling body 112; the lower surfaces of the central honeycomb core panel 111, the annular filling body 112 and the annular honeycomb core panel 113 are flush and their thickness increases successively, and the upper surfaces of the three together constitute an annular stepped groove structure.

[0050] The honeycomb core layer 11 adopts a stepped modular design, which is easy to assemble and manufacture. Through the central honeycomb core panel 111, the annular filling body 112 and the annular honeycomb core panel 113 of different thicknesses, it is convenient to construct an upper surface with an annular stepped groove structure, similar to a boat-shaped design, which is used to collect rainwater while also increasing buoyancy and pressure resistance.

[0051] In some embodiments, the honeycomb core layer 11 also includes an annular filling body 114; there are multiple annular honeycomb core panels 113, and the multiple annular honeycomb core panels 113 are concentrically nested from the inside to the outside and the thickness increases successively; an annular filling body 114 is concentrically nested between any two adjacent annular honeycomb core panels 113, and the bottom end surfaces of the annular honeycomb core panels 113 and the annular filling body 114 are flush; the thickness of the annular filling body 114 on both radial sides is the same as the thickness of the adjacent annular honeycomb core panels 113, and the top surface of the annular filling body 114 is an inclined surface 1141 inclined from the outside to the inside.

[0052] By fitting the second annular filling body 114 and nesting it between two adjacent annular honeycomb core panels 113, and designing the top surface of the second annular filling body 114 as an inclined surface to connect two adjacent annular honeycomb core panels 113 with a thickness difference, it is convenient to evenly lay the static conductive fire retardant layer and the anti-aging layer on the top surface of the honeycomb core layer 11 in the later stage, and make the overall inclination from the edge to the center of the external floating roof meet the requirements, so that the rainwater on the external floating roof can be smoothly gathered and discharged to the center.

[0053] Specifically, both the annular filling body 112 and the annular filling body 2 114 are made of flame-retardant fillers.

[0054] Specifically, the central honeycomb core plate 111 and the multiple annular honeycomb core plates 113 are all individually sealed structures to form multiple independent buoyancy units, which can improve the reliability of the buoyancy of the external floating roof. The upper end surface of the honeycomb core layer 11 adopts a gradual trapezoidal structure to ensure smooth drainage of rainwater from the top to the center of the external floating roof.

[0055] Specifically, the central honeycomb core panel 111 can be disc-shaped; the annular filling body 112, the annular filling body 2 114 and the annular honeycomb core panel 113 can all be circular rings; the bottom surface of the modularly assembled honeycomb core layer 11 is flat, and its top surface forms a circular stepped concave groove.

[0056] In some embodiments, a foam weir plate 3 is further included. The foam weir plate 3 is arranged at the top of the floating plate body 1 and close to the outer peripheral side of the floating plate body 1 .

[0057] The foam weir plate 3 is used to block the foam liquid sprayed out when a fire occurs in the floating roof tank.

[0058] In some embodiments, the foam weir plate 3 is a composite sandwich panel.

[0059] The foam weir plate 3 is made of a composite sandwich plate, which increases the plate thickness while reducing the weight, and can improve the rigidity and stability of the external floating roof.

[0060] In some embodiments, the foam weir plate 3 is arranged to extend circumferentially along the floating plate body 1 to form an annular enclosure to construct a fire extinguishing foam storage area 31 between the outer plate surface of the foam weir plate 3 and the inner wall surface of the corresponding storage tank 10 .

[0061] The foam weir plate 3 is designed to be annular, and a fire extinguishing foam storage area 31 can be constructed between the outer plate surface of the foam weir plate 3 and the inner wall surface of the external floating roof tank. The foam liquid sprayed from the fire extinguisher on the top of the tank can be gathered in the foam storage area 31 to cover the gap between the external floating roof and the inner wall surface of the tank, so that the volatile gas in the tank is isolated from the air, thereby improving the fire extinguishing effect.

[0062] In some embodiments, it also includes a guide column 4, a floating roof support 5 and an anti-rotation device 6; the guide column 4 corresponds to the outer peripheral side of the foam weir plate 3 and vertically slides through the floating plate body 1 to guide the lifting and lowering of the floating plate body 1; the floating roof support 5 corresponds to the inner peripheral side of the foam weir plate 3 and is vertically fixed at the lower end of the floating plate body 1; the anti-rotation device 6 corresponds to the outer peripheral side of the foam weir plate 3 and vertically slides through the floating plate body 1.

[0063] The guide column 4 is arranged on the outer peripheral side of the foam weir plate 3 near the edge of the floating plate body 1. While playing the role of lifting and guiding the floating plate body 1, it can also effectively control the gap between the outer peripheral side of the floating plate body 1 and the inner wall of the external floating roof tank. When the floating plate body 1 gradually descends, the lower end of the floating roof support 5 can abut the inner bottom surface of the external floating roof tank to support the floating plate body 1 and form a safe maintenance space between the floating plate body 1 and the inner bottom surface of the external floating roof tank.

[0064] Specifically, the anti-rotation device 6 can be a steel wire rope; the lower end of the steel wire rope is fixed to the tank bottom of the external floating roof storage tank, and the upper end is fixed to the top of the external floating roof storage tank.

[0065] In some embodiments, it also includes a static electricity extraction device 7, an automatic ventilation valve device 8 and a manhole ladder assembly 9; the static electricity extraction device 7 electrically connects the static electricity conductive anti-corrosion layer and the static electricity conductive flame retardant layer to extract the static electricity accumulated on the static electricity conductive anti-corrosion layer and the static electricity conductive flame retardant layer; the automatic ventilation valve device 8 is installed on the floating plate body 1; the manhole ladder assembly 9 includes a manhole 91 and a ladder 92; the manhole 91 is arranged on the floating plate body 1, and the ladder 92 is installed at the lower end of the floating plate body 1 and corresponds to the manhole 91.

[0066] The static conductive anti-corrosion layer in contact with the liquid surface is used to gather static electricity on the surface of the oil, and the static conductive flame retardant layer in contact with the external air is used to gather static electricity in the external atmosphere. The static conductive anti-corrosion layer and the static conductive flame retardant layer can effectively conduct away the static electricity on the upper and lower surface layers of the floating plate body 1 by electrically connecting the static conductive anti-corrosion layer and the static conductive flame retardant layer to prevent electric sparks from causing fires. The automatic vent valve device 8 can be used to discharge volatile gases above the liquid surface of the external floating roof storage tank, and can be opened for ventilation when the floating plate body 1 drops to the lowest point to facilitate the smooth discharge of the liquid below the floating plate body 1 in the storage tank. The manhole 91 is used for maintenance personnel to enter the area below the floating plate body 1 in the storage tank for operation, and the vertical ladder 92 is convenient for maintenance personnel to climb up and down.

[0067] Specifically, the static electricity decoupling device 7 can be a conductive wire, one end of which is electrically connected to the static electricity conductive anti-corrosion layer and the static electricity conductive flame retardant layer, and the other end of which is electrically connected to the ground.

[0068] In some embodiments, an anti-backflow valve 14 is installed on the floating platform body 1 at a location corresponding to the drain port 1111 .

[0069] The anti-backflow valve 14 is used to control the rainwater collected in the annular stepped groove to be discharged downward from the drainage outlet 1111 and prevent the liquid from backflowing upward from the drainage outlet 1111.

[0070] Specifically, the drain port 1111 is located on the central honeycomb core plate 111. In order to improve drainage efficiency to cope with rainstorm weather, a plurality of drain ports 1111 can be opened in the middle of the central honeycomb core plate 111, and an anti-backflow valve 14 is installed at each drain port 1111.

[0071] Specifically, the anti-backflow valve 14 can be an existing one-way valve product. The anti-backflow valve 14 is arranged at the lowest position in the center of the central honeycomb core plate 111 to smoothly drain water and prevent liquid from returning.

[0072] In some embodiments, the anti-backflow valve 14 is a drain valve device with an automatic anti-backflow function; the anti-backflow valve 14 is made of stainless steel, and its bottom surface is an inclined surface, the inclined surface is half open, and a counterweight valve cover is installed in the opening part. When water enters, the counterweight valve cover opens. When there is no water, the counterweight valve cover blocks the half opening under the action of the counterweight gravity to prevent gas volatilization and prevent backflow at the same time.

[0073] Another embodiment of the present invention provides a method for preparing a composite material external floating roof, comprising the following steps:

[0074] Step 1: Using honeycomb panels of different thicknesses to make the honeycomb core layer 11, so that the bottom surface of the honeycomb core layer 11 is a flat surface, and the top surface of the honeycomb core layer 11 is a ring-shaped stepped concave surface;

[0075] Step 2: coating the interface adhesive on the upper and lower surfaces of the honeycomb core layer 11, and laying the upper glass fiber reinforced plastic structure layer 13 on the upper surface of the honeycomb core layer 11 by hand lay-up molding process, and laying the lower glass fiber reinforced plastic structure layer 12 on the lower surface of the honeycomb core layer 11 by hand lay-up molding process;

[0076] Step 3: using a spraying process to sequentially form a static conductive and flame retardant layer and an anti-aging layer on the upper surface of the upper glass fiber reinforced plastic structure layer 13;

[0077] Step 4: A static conductive anti-corrosion layer is made on the lower surface of the lower glass fiber reinforced plastic structure layer 12 by using a spraying process.

[0078] Specifically, the central honeycomb core plate 111 and the plurality of annular honeycomb core plates 113 of the honeycomb core layer 11 can be made of flame-retardant honeycomb plates of different thicknesses, and the interface adhesive of FRP and PP honeycomb is arranged on the upper and lower surfaces thereof, so that the interface is similar to a "rivet" structure, achieving the adhesion of the interface, so as to prevent the interface from being delaminated and cracked in an outdoor exposure environment. A reinforcement layer, a flame-retardant layer and a static conductive layer are made on the honeycomb core layer 11; the anti-aging layer on the upper surface of the floating plate body 1 is a resin-rich layer added with an anti-ultraviolet absorber, an anti-aging agent and an anti-wear agent.

[0079] The present invention uses a honeycomb panel as an anti-floating functional layer, and applies a composite material reinforcement layer, a flame retardant layer, an electrostatic conductive layer and other functional layers for modular production. Different thicknesses are used in the thickness of the module. The thickness value of the module is calculated according to the slope of the upper part of the floating roof, and finally presents a gradient thickness to meet the slope value of the upper part of the floating roof. The bottom surface of the floating roof after overall installation is flat and can be fully contacted with liquid. The external floating roof of the present invention is a fully composite material using a highly corrosion-resistant polymer resin and high-strength fiber products, which can be modularly produced. The central honeycomb core panel 111 and multiple annular honeycomb core panels 113 can use a polypropylene honeycomb panel with a non-woven fabric with an adhesive function.

[0080] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0081] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A composite material external floating roof, characterized in that: include: A floating plate body (1), the floating plate body (1) comprising a static conductive anti-corrosion layer, a lower glass fiber reinforced plastic structure layer (12), a honeycomb core layer (11), an upper glass fiber reinforced plastic structure layer (13), a static conductive anti-flammable layer and an anti-aging layer, which are sequentially arranged from bottom to top; the lower surface of the floating plate body (1) is a plane for contacting a liquid surface, and the upper surface thereof has an annular stepped groove structure for collecting rainwater; a drainage port (1111) communicating with the annular stepped groove structure is provided in the middle of the bottom surface of the floating plate body (1); The floating plate peripheral sealing structure (2) is sleeved on the outer peripheral side of the floating plate body (1) to seal the gap between the outer peripheral side of the floating plate body (1) and the inner wall of the storage tank.

2. A composite material external floating roof according to claim 1, characterized in that: The honeycomb core layer (11) comprises a central honeycomb core plate (111), an annular filling body (112) and an annular honeycomb core plate (113); the annular filling body (112) is sleeved on the outer periphery of the central honeycomb core plate (111), and the annular honeycomb core plate (113) is sleeved on the outer periphery of the annular filling body (112); the lower surfaces of the central honeycomb core plate (111), the annular filling body (112) and the annular honeycomb core plate (113) are flush and their thickness increases successively, and the upper surfaces of the three together constitute the annular stepped groove structure.

3. A composite material external floating roof according to claim 2, characterized in that: The honeycomb core layer (11) also includes an annular filling body 2 (114); there are multiple annular honeycomb core panels (113), and the multiple annular honeycomb core panels (113) are concentrically nested from the inside to the outside and the thickness increases successively; the annular filling body 2 (114) is concentrically nested between any two adjacent annular honeycomb core panels (113), and the bottom end surfaces of the annular honeycomb core panels (113) and the annular filling body 2 (114) are flush; the thickness of the annular filling body 2 (114) on both radial sides is the same as the thickness of the adjacent annular honeycomb core panels (113), and the top surface of the annular filling body 2 (114) is an inclined surface inclined from the outside to the inside.

4. The composite material external floating roof according to claim 1, characterized in that: It also comprises a foam weir plate (3), wherein the foam weir plate (3) is arranged at the top end of the floating plate body (1) and close to the outer peripheral side of the floating plate body (1).

5. A composite material external floating roof according to claim 4, characterized in that: The foam weir plate (3) is a composite material sandwich plate.

6. A composite material external floating roof according to claim 4, characterized in that: The foam weir plate (3) is arranged to extend circumferentially along the floating plate body (1) to form an annular enclosure, so as to construct a fire extinguishing foam storage area (31) between the outer plate surface of the foam weir plate (3) and the inner wall surface of the corresponding storage tank.

7. A composite material external floating roof according to claim 6, characterized in that: It also includes a guide column (4), a floating roof support column (5) and an anti-rotation device (6); the guide column (4) corresponds to the outer peripheral side of the foam weir plate (3) and vertically slides through the floating plate body (1) to guide the lifting and lowering of the floating plate body (1); the floating roof support column (5) corresponds to the inner peripheral side of the foam weir plate (3) and is vertically fixed to the lower end of the floating plate body (1); the anti-rotation device (6) corresponds to the outer peripheral side of the foam weir plate (3) and vertically slides through the floating plate body (1).

8. The composite material external floating roof according to claim 1, characterized in that: It also includes a static electricity extraction device (7), an automatic ventilation valve device (8) and a manhole ladder assembly (9); the static electricity extraction device (7) electrically connects the static electricity conductive anti-corrosion layer and the static electricity conductive flame retardant layer to extract static electricity accumulated on the static electricity conductive anti-corrosion layer and the static electricity conductive flame retardant layer; the automatic ventilation valve device (8) is installed on the floating plate body (1); the manhole ladder assembly (9) includes a manhole (91) and a ladder (92); the manhole (91) is arranged on the floating plate body (1), and the ladder (92) is installed at the lower end of the floating plate body (1) and corresponds to the manhole (91).

9. The composite material external floating roof according to claim 1, characterized in that: A backflow prevention valve (14) is installed on the floating plate body (1) at a position corresponding to the drainage port (1111).

10. A method for preparing a composite material external floating roof according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: using honeycomb panels of different thicknesses to make a honeycomb core layer (11), so that the bottom surface of the honeycomb core layer (11) is a flat surface, and the top surface of the honeycomb core layer (11) is a ring-shaped stepped concave surface; Step 2: coating the upper and lower surfaces of the honeycomb core layer (11) with an interface adhesive, and laying an upper glass fiber reinforced plastic structure layer (13) on the upper surface of the honeycomb core layer (11) by a hand-layup molding process, and laying a lower glass fiber reinforced plastic structure layer (12) on the lower surface of the honeycomb core layer (11) by a hand-layup molding process; Step 3: using a spraying process to sequentially form a static conductive and flame retardant layer and an anti-aging layer on the upper surface of the upper glass fiber reinforced plastic structure layer (13); Step 4: Using a spraying process to form a static conductive anti-corrosion layer on the lower surface of the lower glass fiber reinforced plastic structure layer (12).

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