Low-temperature natural gas storage tank outer wall condensate water diversion and collection structure

Abstract

The utility model discloses a kind of low-temperature natural gas storage tank outer wall condensate water flow guide collection structure, it is related to flow guide device technical field, including tank body and glass steel, the inner wall bottom of glass steel is fixedly connected with condensate water flow guide assembly, the bottom of glass steel is movably connected with collection sealing assembly.The utility model said a kind of low-temperature natural gas storage tank outer wall condensate water flow guide collection structure, its through condensate water flow guide assembly can utilize the arc structure of upper arc seat and lower arc seat, guide the condensate water generated along the outer wall of heat preservation layer to the outside wall of tank body and flow down, converge to the lowest place of lower arc seat, discharge through drain pipe.By collection sealing assembly can be introduced into collection box with the condensate water discharged by drain pipe, it is convenient to centralized processing, avoid condensate water direct drop pollution environment or corrosion storage tank foundation.Secondly, collection box can be slidably removed and cleaned, the structure of damper sleeve plate and insert column is convenient for its quick installation and disassembly, and strong convenience.

Description

Technical Field

[0001] This utility model relates to the field of diversion device technology, and in particular to a condensate diversion and collection structure on the outer wall of a cryogenic natural gas storage tank. Background Technology

[0002] Natural gas is typically stored in a liquid state in cryogenic storage tanks (at temperatures around -162°C), where the inner wall temperature of the tank is extremely low. To maintain this low temperature, the outer wall of the tank is generally equipped with multiple layers of insulation (such as polyurethane foam, vacuum layers, etc.). However, the insulation layer is not completely heat-insulating, and a small amount of heat can still be transferred into the tank through heat conduction and radiation. The air in the external environment contains water vapor (humidity varies with the environment). When the air comes into contact with the tank's outer wall, which is below its dew point temperature, the water vapor in the air will condense into liquid water due to the temperature drop, forming condensate. Therefore, a condensate drainage structure needs to be installed inside the fiberglass reinforced plastic (FRP) tank to prevent the insulation layer from being submerged in water for extended periods, thus prolonging its service life.

[0003] Chinese patent document CN219673944U discloses a flow guiding device suitable for the exterior of a cryogenic storage tank. It is fixedly connected to the interior of a fiberglass structure via polyurethane foam. A gap is provided at the bottom of the tank body, located inside the fiberglass. A plastic outer shell is located below the fiberglass, and a stainless steel sheet is provided on the outside of the plastic outer shell. The stainless steel sheet is fixedly connected to the bottom of the fiberglass by adhesive, and the plastic outer shell is also fixedly connected to the fiberglass by adhesive. Ultimately, condensed water can flow out along the main flow guiding device composed of the plastic outer shell and an elastic diaphragm, preventing long-term water accumulation from damaging the performance of the polyurethane insulation material and thus affecting the overall cold-keeping performance of the cryogenic storage tank.

[0004] The existing technology has the following problems:

[0005] First, existing fiberglass structures are cylindrical, with right-angled gaps between the fiberglass and the polyurethane foam edges. Condensation accumulates at these points and is difficult to retain due to gravity. This accumulated water will soak the insulation layer (polyurethane foam) for extended periods, accelerating its performance degradation.

[0006] Second, although the existing plastic shell can collect condensate, it is cumbersome and inconvenient to manually remove the plastic shell every time the condensate is drained. Utility Model Content

[0007] This invention provides a condensate drainage and collection structure for the outer wall of a cryogenic natural gas storage tank to solve the problems mentioned in the background art.

[0008] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0009] A condensate drainage and collection structure for the outer wall of a cryogenic natural gas storage tank includes a tank body and a fiberglass reinforced plastic (FRP) structure. The outer wall of the tank body is bonded with multiple layers of insulation by polyurethane adhesive. The outer wall of the outermost insulation layer is bonded to the inner wall of the FRP structure by polyurethane adhesive. A condensate drainage component is fixedly connected to the bottom of the inner wall of the FRP structure, and a collection and sealing component is movably connected to the bottom of the FRP structure.

[0010] The condensate diversion assembly includes an upper arc-shaped seat, the upper end of which is fixedly connected to the top of the inner wall of the fiberglass, the bottom of which is an arc-shaped structure matching the tank body, and the bottom of which is bonded to the top of the outermost insulation layer by polyurethane adhesive. A lower arc-shaped seat is fixedly installed on the bottom of the inner wall of the fiberglass, and a diversion cavity is provided between the lower arc-shaped seat and the outermost insulation layer.

[0011] The collection and sealing assembly includes a connecting base, the upper middle part of which is movably connected to the lower end of the fiberglass, and a storage groove is provided in the middle right side of the connecting base. A drain pipe that penetrates the top of the inner wall of the storage groove is fixedly installed on the inner wall of the middle part of the lower arc-shaped seat.

[0012] Preferably, the lower arc-shaped seat is bowl-shaped, the bottom of the upper arc-shaped seat is concave, and the top of the lower arc-shaped seat is concave.

[0013] Preferably, the drain pipe is located at the lowest point of the recessed top of the lower arc-shaped seat.

[0014] Preferably, a collar is fixedly installed at the bottom of the outer wall of the fiberglass, and the collar is detachably connected to the upper middle part of the connecting base by a number of bolts. A silicone rubber sealing ring is provided on the contact surface between the collar and the connecting base.

[0015] Preferably, a collection box is slidably connected to the inner wall of the storage compartment, the drain pipe is located on the upper left side of the collection box, a connecting plate is fixedly installed on the right side of the collection box, a fixing frame is fixedly installed on the outer left side of the connecting plate, a fluororubber sealing ring is glued to the middle left side of the fixing frame, and a matching fluororubber sealing ring is provided in the middle right side of the connecting base around the position of the storage compartment.

[0016] Preferably, sleeves are fixedly installed at the front and rear positions of the upper right side of the connecting base, sliders are slidably connected to the inner walls of the two sleeves, fixed shafts are fixedly connected to the right sides of the two sliders, damping sleeves are rotatably connected to the right sides of the outer walls of the two fixed shafts, insertion pins are fixedly installed at the bottom left sides of the two damping sleeves, and insertion holes for matching insertion pins are opened at the front and rear positions of the top right side of the connecting plate.

[0017] Preferably, springs are fixedly connected to the left side of the inner wall of both sleeves, and the right ends of the two springs are fixedly connected to the left side of the two sliders.

[0018] Preferably, a handle is fixedly connected to the bottom right side of the connecting plate.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. This utility model provides a condensate drainage and collection structure for the outer wall of a cryogenic natural gas storage tank. Through the cooperation of an upper arc-shaped seat, a lower arc-shaped seat, a drainage cavity, and a drain pipe, the arc-shaped structures of the upper and lower arc-shaped seats guide the condensate generated on the outer wall of the tank to flow downwards along the outer wall of the insulation layer, converging at the lowest point of the lower arc-shaped seat and being discharged through the drain pipe. The bottom of the upper arc-shaped seat is bonded to the top of the outer wall of the insulation layer, and a drainage cavity is formed between the lower arc-shaped seat and the insulation layer, ensuring that the condensate flows along a predetermined path and preventing random dripping. This structure promptly drains the condensate, preventing long-term immersion of the polyurethane foam insulation layer which could lead to a decrease in insulation performance and extending the tank's insulation effect.

[0021] 2. This utility model provides a condensate drainage and collection structure for the outer wall of a cryogenic natural gas storage tank. Through the cooperation of a collection box, connecting plate, fixing frame, fluororubber sealing ring, slot, sleeve, fixing shaft, damping sleeve plate, insert post, insertion hole, and spring, condensate discharged from the drain pipe can be guided into the collection box for centralized treatment, preventing condensate from directly dripping and polluting the environment or corroding the tank foundation. The silicone rubber sealing ring between the collar and the connecting base prevents external air or moisture from seeping in. The fluororubber sealing ring on the front side of the collection box, in cooperation with the slot, prevents external air from entering the fiberglass interior through the storage groove. Overall, the sealing performance is strong. Furthermore, the collection box can be slidably removed for cleaning, and the structure of the damping sleeve plate and insert post facilitates quick installation and disassembly, offering high convenience. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall front structure of this utility model;

[0023] Figure 2 This is a schematic cross-sectional view of the overall structure of this utility model;

[0024] Figure 3 This is a schematic diagram of the condensate flow guiding component of this utility model;

[0025] Figure 4 This is a schematic diagram (I) of the structure of the collection and sealing assembly of this utility model;

[0026] Figure 5 This is a schematic diagram (II) of the structure of the collection and sealing assembly of this utility model.

[0027] In the diagram: 1. Tank body; 2. Condensate diversion assembly; 3. Collection and sealing assembly; 4. Fiberglass; 5. Insulation layer; 21. Upper arc-shaped seat; 22. Lower arc-shaped seat; 23. Diversion cavity; 31. Connecting base; 32. Drain pipe; 33. Collar; 34. Collection box; 35. Connecting plate; 36. Fixing frame; 37. Fluororubber sealing ring; 38. Slot; 39. Sleeve; 310. Fixing shaft; 311. Damping sleeve; 312. Insert post; 313. Insertion hole; 314. Spring. Detailed Implementation

[0028] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0029] like Figures 1-4 As shown, a condensate diversion and collection structure for the outer wall of a cryogenic natural gas storage tank includes a tank body 1 and a fiberglass 4. The outer wall of the tank body 1 is bonded with multiple layers of insulation 5 by polyurethane adhesive. The outer wall of the outermost insulation layer 5 is bonded to the inner wall of the fiberglass 4 by polyurethane adhesive. A condensate diversion component 2 is fixedly connected to the bottom of the inner wall of the fiberglass 4, and a collection and sealing component 3 is movably connected to the bottom of the fiberglass 4.

[0030] The condensate diversion assembly 2 includes an upper arc-shaped seat 21, the upper end of which is fixedly connected to the top of the inner wall of the fiberglass 4. The bottom of the upper arc-shaped seat 21 is an arc-shaped structure that matches the tank body 1. The bottom of the upper arc-shaped seat 21 is bonded to the top of the outermost insulation layer 5 with polyurethane adhesive. A lower arc-shaped seat 22 is fixedly installed on the bottom of the inner wall of the fiberglass 4. A diversion cavity 23 is provided between the lower arc-shaped seat 22 and the outermost insulation layer 5.

[0031] The collection sealing assembly 3 includes a connecting base 31, the upper middle part of which is movably connected to the lower end of the fiberglass 4. A storage groove is provided in the middle right side of the connecting base 31, and a drain pipe 32 that penetrates the top of the inner wall of the storage groove is fixedly installed on the inner wall of the lower arc-shaped seat 22.

[0032] The condensate diversion assembly 2 utilizes the arc-shaped structures of the upper arc-shaped seat 21 and the lower arc-shaped seat 22 to guide the condensate generated on the outer wall of the tank 1 downwards along the outer wall of the insulation layer 5, converging at the lowest point of the lower arc-shaped seat 22 and being discharged through the drain pipe 32. The bottom of the upper arc-shaped seat 21 is bonded to the top of the outer wall of the insulation layer 5, and a diversion cavity 23 is formed between the lower arc-shaped seat 22 and the insulation layer 5, ensuring that the condensate flows along a preset path and preventing random dripping. This structure promptly diverts the condensate, preventing the insulation performance of the polyurethane foam insulation layer from being soaked for a long time, thus extending the insulation effect of the storage tank. The collection and sealing assembly 3 guides the condensate discharged from the drain pipe 32 into the collection box 34 for centralized treatment, preventing the condensate from dripping directly and polluting the environment or corroding the tank foundation. The silicone rubber sealing ring between the collar 33 and the connecting base 31 prevents external air or moisture from seeping in, and the fluororubber sealing ring 37 on the front side of the collection box 34 cooperates with the slot 38 to prevent external air from entering the fiberglass 4 through the storage slot. The overall sealing performance is strong. Secondly, the collection box 34 can be slid out for cleaning, and the structure of the damping sleeve 311 and the insertion post 312 facilitates its quick installation and disassembly, making it highly convenient.

[0033] like Figure 3 As shown, the lower arc-shaped seat 22 is bowl-shaped, the bottom of the upper arc-shaped seat 21 is concave, and the top of the lower arc-shaped seat 22 is concave.

[0034] The arc-shaped structure increases the contact area and improves the flow guiding efficiency, while adapting to the curved surface of the storage tank to avoid dead corners where liquid accumulates.

[0035] like Figure 3 As shown, the drain pipe 32 is located at the lowest point of the recessed top of the lower arc-shaped seat 22.

[0036] The drain pipe 32 efficiently guides the condensate in the guide cavity 23 into the collection and sealing assembly 3, preventing water accumulation from affecting the insulation effect or causing the equipment to freeze.

[0037] like Figure 2 As shown, a collar 33 is fixedly installed on the bottom of the outer wall of the fiberglass 4. The collar 33 is detachably connected to the upper middle part of the connecting base 31 by several bolts. A silicone rubber sealing ring is provided on the contact surface between the collar 33 and the connecting base 31.

[0038] Silicone rubber sealing rings enhance the sealing performance of the joints, preventing external moisture intrusion or condensate leakage, and are suitable for sealing requirements in low-temperature environments.

[0039] like Figure 4 and Figure 5As shown, a collection box 34 is slidably connected to the inner wall of the storage compartment. A drain pipe 32 is located on the upper left side of the collection box 34. A connecting plate 35 is fixedly installed on the right side of the collection box 34. A fixing frame 36 is fixedly installed on the outer left side of the connecting plate 35. A fluororubber sealing ring 37 is glued to the middle left side of the fixing frame 36. A slot 38 matching the fluororubber sealing ring 37 is opened on the middle right side of the connecting base 31 around the position of the storage compartment.

[0040] Fluororubber is resistant to low temperatures and corrosion, making it suitable for sealing needs in low-temperature natural gas environments.

[0041] like Figure 5 As shown, sleeves 39 are fixedly installed at the front and rear positions of the upper right side of the connecting base 31. Sliders are slidably connected to the inner walls of the two sleeves 39. Fixed shafts 310 are fixedly connected to the right side of the two sliders. Damping sleeves 311 are rotatably connected to the right side of the outer walls of the two fixed shafts 310. Insertion pins 312 are fixedly installed at the bottom left side of the two damping sleeves 311. Insertion holes 313 for matching insertion pins 312 are opened at the front and rear positions of the top right side of the connecting plate 35.

[0042] When it is necessary to empty the condensate from the collection box 34, pull the two damping sleeves 311, causing them to move the two fixed shafts 310 and the two sliders forward. The two springs 314 are stretched, and the two inserts 312 follow the corresponding damping sleeves 311 away from the corresponding inserts 313, thereby releasing the collection box 34 from its fixed state. Then rotate the two damping sleeves 311 to move them away from the right side of the connecting plate 35. Finally, the worker uses the handle to slide the collection box 34 out of the storage slot.

[0043] like Figure 5 As shown, springs 314 are fixedly connected to the left side of the inner wall of both sleeves 39, and the right ends of the two springs 314 are fixedly connected to the left side of the two sliders.

[0044] like Figure 4 As shown, a handle is fixedly connected to the bottom right side of the connecting plate 35.

[0045] The working principle of this utility model is as follows: During use, condensation occurs on the outer wall of the cryogenic natural gas storage tank due to temperature difference, and water droplets adhere to the outer side of the insulation layer 5 or the inner wall of the fiberglass 4. The condensation slides down the inner wall of the fiberglass 4. Due to the concave arc-shaped structure at the bottom of the upper arc-shaped seat 21, the water flows into the guide cavity 23 between the lower arc-shaped seat 22 and the insulation layer 5 under gravity. Because the top of the lower arc-shaped seat 22 is concave, the condensation flows to the lowest point, i.e., the drain pipe 32, under the action of gravity. The condensation discharged from the drain pipe 32 is automatically guided into the collection box 34. The bowl-shaped structure of the lower arc-shaped seat 22 ensures that the condensation flows along a preset path, preventing random dripping. The silicone rubber sealing ring between the collar 33 and the connecting base 31 prevents external air or moisture from seeping in. The fluororubber sealing ring 37 on the front side of the collection box 34 cooperates with the slot 38 to prevent external air from entering the interior of the fiberglass 4 through the storage slot. The overall sealing performance is strong.

[0046] When it is necessary to empty the condensate from the collection box 34, pull the two damping sleeves 311, causing them to move the two fixed shafts 310 and the two sliders forward, stretching the two springs 314. The two inserts 312 follow the corresponding damping sleeves 311 away from the corresponding inserts 313, thereby releasing the collection box 34 from its fixed state. Then rotate the two damping sleeves 311, moving them away from the right side of the connecting plate 35. Finally, the worker uses the handle to slide the collection box 34 out of the storage slot. The installation is as described above and will not be elaborated further.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A condensate drainage and collection structure for the outer wall of a cryogenic natural gas storage tank, comprising a tank body (1) and fiberglass (4), characterized in that: The outer wall of the tank (1) is bonded with multiple layers of insulation layer (5) by polyurethane adhesive. The outer wall of the outermost insulation layer (5) is bonded to the inner wall of the fiberglass (4) by polyurethane adhesive. A condensate diversion component (2) is fixedly connected to the bottom of the inner wall of the fiberglass (4). A collection and sealing component (3) is movably connected to the bottom of the fiberglass (4). The condensate diversion assembly (2) includes an upper arc-shaped seat (21), the upper end of which is fixedly connected to the top of the inner wall of the fiberglass (4), the bottom of which is an arc-shaped structure matching the tank (1), the bottom of which is bonded to the top of the outermost insulation layer (5) by polyurethane adhesive, a lower arc-shaped seat (22) is fixedly installed on the bottom of the inner wall of the fiberglass (4), and a diversion cavity (23) is provided between the lower arc-shaped seat (22) and the outermost insulation layer (5); The collecting sealing assembly (3) includes a connecting base (31), the upper middle part of the connecting base (31) is movably connected to the lower end of the fiberglass (4), a storage groove is provided in the middle right side of the connecting base (31), and a drain pipe (32) penetrating the top of the inner wall of the lower arc-shaped seat (22) is fixedly installed on the inner wall of the middle part of the lower arc-shaped seat (22).

2. The condensate diversion and collection structure on the outer wall of a cryogenic natural gas storage tank according to claim 1, characterized in that: The lower arc-shaped seat (22) is bowl-shaped, the bottom of the upper arc-shaped seat (21) is concave, and the top of the lower arc-shaped seat (22) is concave.

3. The condensate diversion and collection structure on the outer wall of a cryogenic natural gas storage tank according to claim 1, characterized in that: The drain pipe (32) is located at the lowest point of the concave top of the lower arc-shaped seat (22).

4. The condensate diversion and collection structure on the outer wall of a cryogenic natural gas storage tank according to claim 1, characterized in that: A collar (33) is fixedly installed on the bottom of the outer wall of the fiberglass (4). The collar (33) is detachably connected to the upper middle part of the connecting base (31) by several bolts. A silicone rubber sealing ring is provided on the contact surface between the collar (33) and the connecting base (31).

5. The condensate diversion and collection structure on the outer wall of a cryogenic natural gas storage tank according to claim 1, characterized in that: A collection box (34) is slidably connected to the inner wall of the storage compartment. The drain pipe (32) is located on the upper left side of the collection box (34). A connecting plate (35) is fixedly installed on the right side of the collection box (34). A fixing frame (36) is fixedly installed on the outer left side of the connecting plate (35). A fluororubber sealing ring (37) is glued to the middle left side of the fixing frame (36). A slot (38) for matching the fluororubber sealing ring (37) is opened on the middle right side of the connecting base (31) around the storage compartment.

6. The condensate diversion and collection structure on the outer wall of a cryogenic natural gas storage tank according to claim 5, characterized in that: Sleeves (39) are fixedly installed at the front and rear positions of the upper right side of the connecting base (31). Sliders are slidably connected to the inner walls of the two sleeves (39). Fixed shafts (310) are fixedly connected to the right side of the two sliders. Damping sleeves (311) are rotatably connected to the right side of the outer walls of the two fixed shafts (310). Insert pins (312) are fixedly installed at the bottom left side of the two damping sleeves (311). Insertion holes (313) for matching insert pins (312) are opened at the front and rear positions of the top right side of the connecting plate (35).

7. The condensate diversion and collection structure on the outer wall of a cryogenic natural gas storage tank according to claim 6, characterized in that: Springs (314) are fixedly connected to the left side of the inner wall of both sleeves (39), and the right ends of the two springs (314) are fixedly connected to the left side of the two sliders.

8. The condensate diversion and collection structure on the outer wall of a cryogenic natural gas storage tank according to claim 7, characterized in that: A handle is fixedly connected to the bottom right side of the connecting plate (35).

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