LNG storage tank with safety protection

Abstract

This invention provides an LNG storage tank with safety protection, including a tank body, a base at the bottom of the tank body, and a plurality of protective components surrounding the tank body. The protective components are movably connected to the base, and a buffer component is provided between the protective components and the tank body. A filling component is provided at the top of the tank body, and protective components are provided around its exterior. This can reduce the occurrence of accidents such as tank rupture and leakage in case of accidents, thereby reducing the risk to personnel and the environment, and solving the problem of damage to the LNG tank wall caused by direct external compression and collision.

Description

Technical Field

[0001] This invention relates to the field of LNG storage, and in particular to an LNG storage tank with safety protection. Background Technology

[0002] LNG (Liquefied Natural Gas) is a liquid formed by cooling gaseous natural gas at atmospheric pressure to -162°C, causing it to condense. LNG's main component is methane, and it boasts advantages such as being colorless, odorless, non-toxic, small in volume, and lightweight. Furthermore, it has a high calorific value and its combustion products are environmentally clean. As a highly efficient and environmentally friendly energy source, LNG is increasingly favored and its applications are becoming more widespread.

[0003] The protection and explosion prevention measures for existing LNG storage tanks have always been a major concern. Direct collisions or compression against the tank walls can easily damage the tank walls, leading to natural gas leaks and endangering lives. Summary of the Invention

[0004] The main objective of this invention is to provide an LNG storage tank with safety protection, which solves the problem of damage to the LNG tank wall caused by direct external compression and collision.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: an LNG storage tank with safety protection, including a tank body, a base at the bottom of the tank body, a plurality of protective components surrounding the tank body, the protective components being movably connected to the base, a buffer component being provided between the protective components and the tank body, and a filling component being provided at the top of the tank body.

[0006] In the preferred embodiment, the tank body includes an inner wall and an insulation wall, a cooling chamber is provided between the inner wall and the insulation wall, and a leak detection chamber is provided between the top of the insulation wall and the outer wall.

[0007] The top of the tank is also equipped with a filling port, and a rotatable sealing cap is provided on one side of the filling port.

[0008] In the preferred embodiment, the interlayer of the insulation wall is filled with fiberglass elastic felt;

[0009] A ring-shaped gas detector is installed at the top inside the leak detection chamber.

[0010] In a preferred embodiment, the protective component includes a housing, an inflation chamber inside the housing, a rubber plate on the outside of the housing, a guide shaft between the lower part of the inflation chamber and the base, the protective component can slide on the guide shaft, positioning springs between the front and rear of the protective component and the base, and a protective air inlet at the bottom of the protective component.

[0011] In the preferred embodiment, the base includes an annular gas pipe and a condenser pipe, with the condenser pipe passing through the center of the annular gas pipe and connected to the bottom of the cooling chamber in the tank.

[0012] An air inlet pipe and an air outlet pipe are provided on one side of the annular air pipe. An air supply pipe is provided above the annular air pipe. An air supply flange is provided at the air outlet end of the air supply pipe. A flexible pipe is provided between the air supply flange and the protective component. The annular air pipe is connected to the protective component.

[0013] In a preferred embodiment, the buffer assembly includes a guide seat disposed on the outer wall of the tank and a guide sleeve disposed on the side of the protective assembly near the tank body, and a trigger pin is fixedly disposed on the side of the guide seat facing the protective assembly.

[0014] The protective component has a thin wall on the side near the trigger pin, which the trigger pin can pierce. A buffer spring is provided between the guide seat and the protective component.

[0015] In the preferred embodiment, the filling assembly includes a filling head and a tank positioning groove. A connection port is provided on one side of the filling head for connecting to an external filling pipe. The connection port is connected to the central filling pipe. A first support is provided at the center of the filling pipe, and a piston pin is provided at the center of the first support.

[0016] A second support is provided at the center of the tank positioning groove, and a liftable piston rod is provided at the center of the second support. An inner hole positioning column is also fixed on the second support. A piston is provided at the lower end of the piston rod, and a spray head is provided at the lower end of the tank positioning groove. A groove is provided below the piston, and a piston spring is provided between the groove and the inner wall of the spray head.

[0017] In the preferred embodiment, the piston pin and piston rod are arranged coaxially, and when the piston pin reaches the bottom, it will press the piston down.

[0018] In the preferred embodiment, the outer circumference of the spray head is provided with a rotatable rotating head, a bearing is provided between the rotating head and the spray head, the interior of the rotating head is connected to the interior of the spray head, the circumferential surface of the spray head is provided with evenly distributed air passage holes, and the bottom of the rotating head is provided with spray holes.

[0019] In the preferred embodiment, the spray hole is tilted at a certain angle and is connected to the inside of the spray head. When the gas is sprayed out, the gas will cause the rotating ring to rotate.

[0020] This invention provides an LNG storage tank with safety protection, which has the following beneficial effects:

[0021] 1. This invention provides an LNG storage tank with safety protection, which has a leak detection chamber at the filling port on the top of the tank to detect whether the storage tank leaks during subsequent storage. After the gas detector detects a leak, it can notify maintenance personnel to carry out maintenance through a cloud platform.

[0022] 2. The present invention provides an LNG storage tank with safety protection, which is equipped with protective components around its exterior to reduce the occurrence of accidents such as tank rupture and leakage in case of accidents, thereby reducing the risk to personnel and the environment.

[0023] 3. The present invention provides an LNG storage tank with safety protection, wherein the protective components are connected to a pipeline at the bottom into which inert non-flammable gas can be introduced. When compression occurs, a large amount of gas can be generated between the protective components and the tank body to form a buffer. When the tank body ruptures, it can dilute some of the leaked natural gas, reduce the possibility of deflagration, and ensure personnel safety. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0025] Figure 1 This is an external isometric view of the LNG storage tank of the present invention;

[0026] Figure 2 This is a cross-sectional view of the LNG storage tank of the present invention;

[0027] Figure 3 This is a partial view of the LNG storage tank of the present invention;

[0028] Figure 4 This is a partial view of the buffer component of the present invention;

[0029] Figure 5 This is an axonometric view of the annular trachea of ​​the present invention;

[0030] Figure 6 This is a connection diagram of the flexible tube of the present invention;

[0031] Figure 7 This is a cross-sectional view of the dispensing component of the present invention;

[0032] Figure 8 This is a cross-sectional view of another form of the injection component of the present invention;

[0033] Figure 9 This is an axial sectional view of the filling component of the present invention;

[0034] Figure 10 This is an axial sectional view of the filling component of the present invention from another direction;

[0035] Figure 11 This is a cross-sectional view of the spray head of the present invention.

[0036] In the diagram: Tank 1; Filling assembly 101; Filling head 1011; Connecting port 1012; Tank filling hole 1013; First bracket 1014; Piston pin 1015; Tank positioning groove 1016; Inner hole positioning pin 1017; Piston rod 1018; Second bracket 1019; Piston 1020; Piston spring 1021; Spray head 1022; Rotating ring 1023; Spray hole 1024; Vent 1025; Leak detection chamber 102; Gas detector 103; Insulation wall 104; Cooling chamber 105; Inner wall of tank 106 ; Buffer assembly 107; Guide seat 1071; Trigger pin 1072; Guide sleeve 1073; Buffer spring 1074; Thin wall 1075; Sealing cover 108; Protective assembly 2; Housing 201; Inflation chamber 202; Rubber plate 203; Guide shaft 204; Positioning spring 205; Protective air inlet 206; Flexible tube 207; Flexible hose flange 2071; Base 3; Annular air pipe 301; Air inlet pipe 3011; Air supply pipe 3012; Air supply flange 3013; Air outlet pipe 3014; Condensate pipe 302; Guide groove 303. Detailed Implementation

[0037] Example 1

[0038] like Figure 1-8 As shown, an LNG storage tank with safety protection includes a tank body 1, a base 3 at the bottom of the tank body 1, a plurality of protective components 2 surrounding the tank body 1, the protective components 2 being movably connected to the base 3, a buffer component 107 being provided between the protective components 2 and the tank body 1, and a filling component 101 being provided at the top of the tank body 1.

[0039] In the preferred embodiment, the tank body 1 includes an inner wall 106 and an insulation wall 104, a cooling chamber 105 is provided between the inner wall 106 and the insulation wall 104, and a leak detection chamber 102 is provided between the top of the insulation wall 104 and the outer wall.

[0040] The top of the tank body 1 is also provided with a tank filling hole 1013, and a rotatable sealing cap 108 is provided on one side of the tank filling hole 1013.

[0041] In the preferred embodiment, the interlayer of the insulation wall 104 is filled with glass fiber elastic felt;

[0042] A ring-shaped gas detector 103 is installed above the inside of the leak detection chamber 102. The gas detector 103 is similar to a fixed combustible gas detector. It has an independent power supply and a module for connecting to a wireless network. When a gas leak is detected, it can sound an alarm and upload the alarm information and concentration parameters to the cloud platform via the wireless network. The control center can monitor it in real time.

[0043] In a preferred embodiment, the protective component 2 includes a housing 201, an inflation chamber 202 inside the housing 201, a rubber plate 203 on the outer side of the housing 201, a guide shaft 204 between the lower part of the inflation chamber 202 and the base 3, the protective component 2 can slide on the guide shaft 204, a positioning spring 205 between the front and rear of the protective component 2 and the base 3, and a protective air inlet 206 at the bottom of the protective component 2.

[0044] In the preferred embodiment, the base 3 includes an annular gas pipe 301 and a condenser pipe 302. The condenser pipe 302 passes through the center of the annular gas pipe 301 and is connected to the bottom of the cooling chamber 105 in the tank body 1.

[0045] An air inlet pipe 301 and an air outlet pipe 3014 are provided on one side of the annular air pipe 301. An air supply pipe 3012 is provided above the annular air pipe 301. An air supply flange 3013 is provided at the air outlet end of the air supply pipe 3012. A flexible pipe 207 is provided between the air supply flange 3013 and the protective component 2. The annular air pipe 301 is connected to the protective component 2.

[0046] In a preferred embodiment, the buffer assembly 107 includes a guide seat 1071 disposed on the outer wall of the tank body 1 and a guide sleeve 1073 disposed on the side of the protective assembly 2 near the tank body 1. A trigger pin 1072 is fixedly disposed on the side of the guide seat 1071 facing the protective assembly 2.

[0047] The protective component 2 has a thin wall 1075 on the side near the trigger needle 1072, and the trigger needle 1072 can pierce through the thin wall 1075. A buffer spring 1074 is provided between the guide seat 1071 and the protective component 2.

[0048] In a preferred embodiment, the filling assembly 101 includes a filling head 1011 and a tank positioning groove 1016. A connection port 1012 is provided on one side of the filling head 1011. The connection port is used to connect with an external filling pipe. The connection port 1012 is connected to the central filling pipe. A first support 1014 is provided at the center of the filling pipe. A piston pin 1015 is provided at the center of the first support 1014.

[0049] A second support 1019 is provided at the center of the tank positioning groove 1016. A liftable piston rod 1018 is provided at the center of the second support 1019. An inner hole positioning post 1017 is also fixed on the second support 1019. A piston 1020 is provided at the lower end of the piston rod 1018. A spray head 1022 is provided at the lower end of the tank positioning groove 1016. A groove is provided below the piston 1020. A piston spring 1021 is provided between the groove and the inner wall of the spray head 1022.

[0050] In the preferred embodiment, the piston pin 1015 and the piston rod 1018 are arranged coaxially, and when the piston pin 1015 reaches the bottom, it will press the piston 1020 down.

[0051] In a preferred embodiment, the outer circumference of the spray head 1022 is provided with a rotatable rotating head 1023, a bearing is provided between the rotating head 1023 and the spray head 1022, the interior of the rotating head 1023 is connected to the interior of the spray head 1022, the circumferential surface of the spray head 1022 is provided with evenly distributed air passage holes 1025, and the bottom of the rotating head 1023 is provided with a spray hole 1024.

[0052] In the preferred embodiment, the spray hole 1024 is tilted at a certain angle, and the spray hole 1024 is connected to the inside of the spray head 1022. When the gas is sprayed out, the gas will cause the rotating ring 1023 to rotate.

[0053] All of the aforementioned metal materials that come into contact with LNG are 9Ni steel.

[0054] The working process and principle of an LNG storage tank with safety protection are as follows: First, an inert gas, such as carbon dioxide, is introduced into the annular gas pipe 301 through the gas inlet pipe 3011. The carbon dioxide enters the gas filling chamber 202 of the protection component 2 through the flexible pipe 207 and is kept at a certain pressure. Then, the condenser pipe 302 is connected to the condensate. The condensate can be liquid nitrogen or a flame-retardant liquid with a large specific heat capacity. The condensate enters the cooling chamber 105 from the bottom of the tank body 1 through the condenser pipe 302 and fills the entire cooling chamber 105.

[0055] Then, the LNG pipeline connected to the filling head 1011 is connected to the filling port 1013 of the tank. When the filling head 1011 is inserted to the bottom, the piston pin 1015 located in the center of the filling head 1011 presses down the piston rod 1018 below it, causing the piston 1020 below to open, allowing LNG to be injected into the tank. A cooling chamber 105 is provided outside the inner wall 106 of the tank, and liquid nitrogen circulates in the cooling chamber 105 to continuously keep the LNG inside the tank at a low temperature. After the LNG is filled, the filling head 1011 is pulled out, and the sealing cap 108 on the top of the tank 1 is closed and sealed. At this time, the gas detector 103 in the leak detection chamber 102 can start working. The gas detector 103 is similar to a fixed combustible gas detector. The detector has an independent power supply and a module for connecting to a wireless network. When a gas leak is detected, it can alarm and upload the alarm information and concentration parameters to the cloud platform through the wireless network. The control center can monitor it in real time.

[0056] In the event of a collision, the protective components 2 surrounding the tank will be the first to impact. Small collisions will primarily hit the outermost rubber plate 203 of the protective components 2, providing some cushioning without triggering further protective measures. When the collision is larger, the housing 201 of the protective components 2 will move inward. At this time, the trigger pin 1072 in the buffer component 107 will pierce the thin wall 1075, and the carbon dioxide in the inflation chamber 202 will quickly enter between the protective components 2 and the tank 1, forming a gas film that can further buffer the impact potential energy on the outer wall of the tank 1 and reduce damage to the tank 1. If the tank 1 is further damaged and gas leakage occurs, the surrounding carbon dioxide and liquid nitrogen can effectively dilute and retard the flame, preventing deflagration.

[0057] Example 2

[0058] Further explanation in conjunction with Example 1, such as Figure 7-11 As shown in the structure, the outer circle of the spray head 1022 is provided with a rotatable rotating head 1023. A bearing is provided between the rotating head 1023 and the spray head 1022. The interior of the rotating head 1023 is connected to the interior of the spray head 1022. The circumferential surface of the spray head 1022 is provided with evenly distributed air passage holes 1025. The bottom of the rotating head 1023 is provided with a spray hole 1024.

[0059] In the preferred embodiment, the spray hole 1024 is tilted at a certain angle, and the spray hole 1024 is connected to the inside of the spray head 1022. When the gas is sprayed out, the gas will cause the rotating ring 1023 to rotate.

[0060] The rotating ring 1023, as it rotates, delivers LNG into the tank 1, which effectively reduces gas resistance, makes the gas distribution inside more uniform, and improves the efficiency of refueling.

[0061] When the spray hole 1024 is tilted at a certain angle, the gas will cause the rotating ring 1023 to rotate when the gas is sprayed out. The gas sprayed out from the spray hole 1024 can quickly flow to the inner wall 106 of the tank. Since there is liquid nitrogen circulating outside the inner wall 106 of the tank, the gas can quickly settle to the bottom of the tank 1, which improves the cooling rate of the gas.

[0062] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. An LNG storage tank with safety protection, characterized in that: It includes a tank (1), a base (3) at the bottom of the tank (1), several protective components (2) surrounding the tank (1), the protective components (2) being movably connected to the base (3), a buffer component (107) being provided between the protective components (2) and the tank (1), and a filling component (101) being provided at the top of the tank (1). The buffer assembly (107) includes a guide seat (1071) on the outer wall of the tank (1) and a guide sleeve (1073) on the side of the protective assembly (2) near the tank (1). A trigger pin (1072) is fixed on the side of the guide seat (1071) facing the protective assembly (2). The protective component (2) has a thin wall (1075) on the side near the trigger needle (1072), and the trigger needle (1072) can pierce through the thin wall (1075). A buffer spring (1074) is provided between the guide seat (1071) and the protective component (2).

2. The LNG storage tank with safety protection according to claim 1, characterized in that: The tank (1) includes an inner wall (106) and an insulation wall (104). A cooling chamber (105) is provided between the inner wall (106) and the insulation wall (104). A leak detection chamber (102) is provided between the top of the insulation wall (104) and the outer wall. The top of the tank (1) is also provided with a tank filling hole (1013), and a rotatable sealing cap (108) is provided on one side of the tank filling hole (1013).

3. The LNG storage tank with safety protection according to claim 2, characterized in that: The interlayer of the insulation wall (104) is filled with glass fiber elastic felt; A ring-shaped gas detector (103) is provided above the inside of the leak detection chamber (102).

4. The LNG storage tank with safety protection according to claim 1, characterized in that: The protective component (2) includes a housing (201), an inflation chamber (202) is provided inside the housing (201), a rubber plate (203) is provided on the outside of the housing (201), a guide shaft (204) is provided between the lower part of the inflation chamber (202) and the base (3), the protective component (2) can slide on the guide shaft (204), a positioning spring (205) is provided between the front and rear of the protective component (2) and the base (3), and a protective air inlet (206) is provided at the bottom of the protective component (2).

5. The LNG storage tank with safety protection according to claim 1, characterized in that: The base (3) includes an annular gas pipe (301) and a condenser pipe (302). The condenser pipe (302) passes through the center of the annular gas pipe (301) and is connected to the bottom of the cooling chamber (105) in the tank (1). An air inlet pipe (3011) and an air outlet pipe (3014) are provided on one side of the annular air pipe (301). An air supply pipe (3012) is provided above the annular air pipe (3012). An air supply flange (3013) is provided at the air outlet end of the air supply pipe (3012). A flexible pipe (207) is provided between the air supply flange (3013) and the protective component (2). The annular air pipe (301) is connected to the protective component (2).

6. The LNG storage tank with safety protection according to claim 1, characterized in that: The filling assembly (101) includes a filling head (1011) and a tank positioning groove (1016). A connection port (1012) is provided on one side of the filling head (1011). The connection port is used to connect with an external filling pipe. The connection port (1012) is connected to the central filling pipe. A first support (1014) is provided at the center of the filling pipe. A piston pin (1015) is provided at the center of the first support (1014). A second support (1019) is provided at the center of the tank positioning groove (1016), and a liftable piston rod (1018) is provided at the center of the second support (1019). An inner hole positioning column (1017) is also fixed on the second support (1019). A piston (1020) is provided at the lower end of the piston rod (1018). A spray head (1022) is provided at the lower end of the tank positioning groove (1016). A groove is provided below the piston (1020), and a piston spring (1021) is provided between the groove and the inner wall of the spray head (1022).

7. An LNG storage tank with safety protection according to claim 6, characterized in that: The piston pin (1015) and piston rod (1018) are arranged coaxially. When the piston pin (1015) reaches the bottom, it will press the piston (1020) down.

8. An LNG storage tank with safety protection according to claim 6, characterized in that: The outer circle of the spray head (1022) is provided with a rotatable rotating head (1023). A bearing is provided between the rotating head (1023) and the spray head (1022). The interior of the rotating head (1023) is connected to the interior of the spray head (1022). The circumferential surface of the spray head (1022) is provided with evenly distributed air passage holes (1025). The bottom of the rotating head (1023) is provided with a spray hole (1024).

9. An LNG storage tank with safety protection according to claim 8, characterized in that: The spray hole (1024) is tilted at a certain angle. The spray hole (1024) is connected to the inside of the spray head (1022). When the gas is sprayed out, the gas will cause the rotating ring (1023) to rotate.

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