Liquefied natural gas unloading safety protection device

Abstract

The utility model discloses a liquid unloading safety protection device for liquefied natural gas, and relates to the technical field of liquefied natural gas. The liquid discharging device comprises a movable plate, wherein an adjusting mechanism and a liquid discharging mechanism are arranged on the movable plate; the adjusting mechanism comprises a flow dividing assembly and a self-locking assembly, the flow dividing assembly comprises a sealing cylinder fixedly connected to the moving plate, the sealing cylinder is rotationally connected with a flow dividing cylinder, the sealing cylinder is fixedly connected with a plurality of fixing sleeve shells, the flow dividing cylinder is fixedly connected with a rotating shaft, and the rotating shaft is rotationally connected with the sealing cylinder. By means of the adjusting mechanism and the elasticity of the spring, a worker pulls up the rotating handle to rotate the flow dividing barrel, the two connecting holes are connected with the two fixing sleeve shells, and the liquid discharging mechanism is matched to complete the functions of discharging liquid and keeping the air pressure of the liquefied natural gas tank constant. Safety protection operation for balancing air pressure can be completed without adjusting and using a plurality of valves to divide the pipeline, the convenience of the device is improved, and the situation that the danger is increased due to too long liquid discharging time is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of liquefied natural gas, in particular to a liquefied natural gas unloading safety protection device. Background Art

[0002] Liquefied natural gas (LNG), primarily composed of methane, is recognized as the cleanest fossil energy source on Earth. It is colorless, odorless, non-toxic, and non-corrosive. Its volume is approximately 1 / 625 of the volume of the same amount of gaseous natural gas, and its mass is only about 45% of the same volume of water. Its production process involves purifying natural gas produced in gas fields, liquefying it through a series of ultra-low temperature processes, and then transporting it via LNG carriers. During the unloading process, the pressure inside the original LNG storage tanks may drop or even increase, potentially causing deformation and explosion hazards. Therefore, a safety device for LNG unloading is required.

[0003] However, some liquid unloading protection devices are cumbersome to operate. A large number of valves and connecting pipes are used to connect the gas transmission device and the liquid transmission device to the tank storing liquefied natural gas. This requires workers to frequently adjust multiple valves to control the unloading of liquid while transporting the gasified natural gas to ensure a constant air pressure in the two tanks to avoid tank explosion. The cumbersome operation of multiple valves for adjustment increases the unloading time and the probability of unstable factors, thereby increasing the risk. Utility Model Content

[0004] The purpose of the utility model is to provide a liquefied natural gas (LNG) unloading safety protection device. By providing an adjustment mechanism and utilizing the elasticity of a spring, a worker pulls up a handle to rotate a diverter tube, thereby connecting two connecting holes with two fixed sleeves. The unloading mechanism cooperates to complete the functions of unloading and maintaining a constant LNG tank pressure. There is no need to adjust and use multiple valves, thus solving the problem of frequently adjusting multiple valves to control unloading to ensure a constant pressure in the two tanks, which increases the unloading time.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The utility model is a liquefied natural gas unloading safety protection device, comprising a movable plate, on which an adjustment mechanism and a liquid unloading mechanism are arranged;

[0007] The regulating mechanism includes a diverter assembly and a self-locking assembly. The diverter assembly includes a sealing cylinder fixedly connected to the top surface of the movable plate. The inner wall of the sealing cylinder is rotatably connected to the diverter cylinder. The outer wall of the sealing cylinder is fixedly connected to a plurality of fixed sleeves. The outer wall of the diverter cylinder is provided with two connecting holes. The top surface of the diverter cylinder is fixedly connected to a rotating shaft. The outer wall of the rotating shaft is rotatably connected to the inner wall of the sealing cylinder.

[0008] Furthermore, the self-locking component includes a rectangular shaft fixedly connected to the top of the rotating shaft, the top of the rectangular shaft is fixedly connected to a top block, the top surface of the sealing cylinder is provided with a card slot, and the inner wall of the card slot is slidably connected to the card cylinder.

[0009] Furthermore, the inner wall of the cartridge is slidably connected to the outer wall of the rectangular shaft, the top of the cartridge is fixedly connected to a spring, the top of the spring is fixedly connected to the bottom surface of the top block, and the outer wall of the cartridge is fixedly connected to a turning handle.

[0010] Furthermore, the liquid unloading mechanism includes a connecting assembly, a limiting assembly and a liquid unloading assembly. The connecting assembly includes a liquefied natural gas tank arranged on the left side of the movable plate. The output end of the liquefied natural gas tank is fixedly connected to an air outlet pipe, and the outer wall of the air outlet pipe is threadedly connected to a connecting sleeve.

[0011] Furthermore, the limiting assembly includes a limiting groove opened on the inner wall of the connecting sleeve, the inner wall of the limiting groove is rotatably connected to the limiting ring, the inner wall of the limiting ring is fixedly connected to the first connecting tube, and the end of the first connecting tube is fixedly connected to the inner wall of the fixed sleeve located on the left.

[0012] Furthermore, the liquid unloading assembly includes an air pump fixedly connected to the top surface of the movable plate, the top surface of the movable plate is fixedly connected to a liquid pump, the top surface of the movable plate is fixedly connected to a liquid unloading tank, the inner walls of the fixed sleeve located on the front and rear sides are fixedly connected to a second connecting pipe, and the end of the second connecting pipe located on the front side is fixedly connected to the left output end of the liquid pump.

[0013] Furthermore, the end of the second connecting pipe located on the rear side is fixedly connected to the left output end of the air pump, the right output ends of the air pump and the liquid pump are fixedly connected to the third connecting pipe, the ends of the two third connecting pipes are fixedly connected to the outer wall of the liquid unloading tank, and the right side of the movable plate is fixedly connected to a push-pull handle.

[0014] The utility model has the following beneficial effects:

[0015] 1. By setting up an adjustment mechanism, the elasticity of the spring is utilized. The staff pulls up the handle to rotate the diverter tube, connects the two connecting holes to the two fixed shells, and cooperates with the liquid unloading mechanism to complete the functions of liquid unloading and constant liquefied natural gas tank pressure. There is no need to adjust and use multiple valves to divert the pipeline to complete the safety protection operation of balancing the air pressure, which improves the convenience of the device and avoids the situation where the liquid unloading time is too long and the risk increases.

[0016] 2. By setting up a liquid unloading mechanism, it is possible to cooperate with the regulating mechanism to selectively adjust the connection between the two second connecting pipes and the first connecting pipe. The liquid pump is used to drive the liquefied natural gas in the liquefied natural gas tank to transport, complete the liquid unloading process, and drive the air pump to transport a small amount of gasified natural gas in the liquid unloading tank into the liquefied natural gas tank to maintain a constant gas pressure in the liquefied natural gas tank, which plays a role in safety protection and further improves the practicality of the device.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the top view of the structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the rear cross-sectional structure of the utility model;

[0022] Figure 4 This is a schematic diagram of the explosion structure of the regulating mechanism of the utility model;

[0023] Figure 5 for Figure 3 Schematic diagram of the enlarged structure at point A in the middle.

[0024] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0025] 1. Moving plate; 2. Adjusting mechanism; 3. Liquid unloading mechanism; 21. Sealing cylinder; 22. Diverter cylinder; 23. Fixed sleeve; 24. Connecting hole; 25. Rotating shaft; 26. Rectangular shaft; 27. Top block; 28. Slot; 29. ​​Sleeve; 210. Spring; 211. Turning handle; 31. Liquefied natural gas tank; 32. Air outlet pipe; 33. Connecting sleeve; 34. Limiting groove; 35. Limiting ring; 36. First connecting pipe; 37. Air pump; 38. Liquid pump; 39. Liquid unloading tank; 310. Second connecting pipe; 311. Third connecting pipe; 312. Push-pull handle. DETAILED DESCRIPTION

[0026] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] See also Figure 1-5 As shown, the utility model is a liquefied natural gas unloading safety protection device, comprising a movable plate 1, on which an adjustment mechanism 2 and a liquid unloading mechanism 3 are provided;

[0028] The regulating mechanism 2 includes a diverter assembly and a self-locking assembly. The diverter assembly includes a sealing cylinder 21 fixedly connected to the top surface of the movable plate 1. The inner wall of the sealing cylinder 21 is rotatably connected to the diverter cylinder 22. The outer wall of the sealing cylinder 21 is fixedly connected to a plurality of fixed sleeves 23. The outer wall of the diverter cylinder 22 is provided with two connecting holes 24. The top surface of the diverter cylinder 22 is fixedly connected to a rotating shaft 25. The outer wall of the rotating shaft 25 is rotatably connected to the inner wall of the sealing cylinder 21.

[0029] Among them Figure 2 、 Figure 3 and Figure 4 As shown, the self-locking assembly includes a rectangular shaft 26 fixedly connected to the top of the rotating shaft 25, the top of the rectangular shaft 26 is fixedly connected to a top block 27, the top surface of the sealing cylinder 21 is provided with a slot 28, the inner wall of the slot 28 is slidably connected to a cartridge 29, the inner wall of the cartridge 29 is slidably connected to the outer wall of the rectangular shaft 26, the top of the cartridge 29 is fixedly connected to a spring 210, the top of the spring 210 is fixedly connected to the bottom surface of the top block 27, and the outer wall of the cartridge 29 is fixedly connected to a turning handle 211.

[0030] By setting up the adjustment mechanism 2, the elasticity of the spring 210 is utilized. The staff rotates the diverter tube 22 by pulling up the turning handle 211, connects the two connecting holes 24 with the two fixed sleeves 23, and cooperates with the liquid unloading mechanism 3 to complete the functions of liquid unloading and constant air pressure of the liquefied natural gas tank 31. There is no need to adjust and use multiple valves to divert the pipeline to complete the safety protection operation of balancing the air pressure, which improves the convenience of the device and avoids the situation where the risk of excessive liquid unloading time increases.

[0031] Among them Figure 2 、 Figure 3 and Figure 5As shown, the liquid unloading mechanism 3 includes a connecting component, a limiting component and a liquid unloading component. The connecting component includes a liquefied natural gas tank 31 arranged on the left side of the movable plate 1. The output end of the liquefied natural gas tank 31 is fixedly connected to an air outlet pipe 32. The outer wall of the air outlet pipe 32 is threadedly connected to a connecting sleeve 33. The limiting component includes a limiting groove 34 provided on the inner wall of the connecting sleeve 33. The inner wall of the limiting groove 34 is rotatably connected to a limiting ring 35. The inner wall of the limiting ring 35 is fixedly connected to a first connecting pipe 36. The end of the first connecting pipe 36 is fixedly connected to the inner wall of the fixed sleeve 23 located on the left. The liquid unloading component includes a connecting component fixedly connected to the top surface of the movable plate 1. The air pump 37 and the top surface of the movable plate 1 are fixedly connected to the liquid pump 38, the top surface of the movable plate 1 is fixedly connected to the liquid unloading tank 39, the inner walls of the front and rear fixed sleeves 23 are fixedly connected to the second connecting pipe 310, the end of the second connecting pipe 310 on the front side is fixedly connected to the left output end of the liquid pump 38, and the end of the second connecting pipe 310 on the rear side is fixedly connected to the left output end of the air pump 37, the right output ends of the air pump 37 and the liquid pump 38 are fixedly connected to the third connecting pipe 311, the ends of the two third connecting pipes 311 are fixedly connected to the outer wall of the liquid unloading tank 39, and the right side of the movable plate 1 is fixedly connected to the push-pull handle 312.

[0032] By providing the liquid unloading mechanism 3, it is possible to cooperate with the regulating mechanism 2 to selectively adjust the connection between the two second connecting pipes 310 and the first connecting pipe 36. The liquid pump 38 is used to drive the liquefied natural gas in the liquefied natural gas tank 31 to complete the liquid unloading process, and the air pump 37 is driven to transport a small amount of gasified natural gas in the liquid unloading tank 39 into the liquefied natural gas tank 31 to maintain a constant air pressure in the liquefied natural gas tank 31, thereby playing a safety protection role and further improving the practicality of the device.

[0033] A specific application of this embodiment is: by setting the adjustment mechanism 2, when the staff needs to adjust the connection between the infusion and gas transmission, they grasp the turning handle 211, use their thumb to press the top block 27 to apply an upward force, and drive the cartridge 29 to slide on the rectangular shaft 26 through the turning handle 211, squeezing the spring 210, and disengaging the two protrusions on the cartridge 29 from the slot 28, wherein the two protrusions on the cartridge 29 are arranged to correspond to the two connecting holes 24 on the shunt cylinder 22. When the cartridge 29 disengages from the slot 28, the turning handle 211 is turned to drive the rotating shaft 25 to rotate in the sealing cylinder 21, and the rotating shaft 25 drives the shunt cylinder 22 to rotate in the sealing cylinder 21. The staff drives the two connecting holes 24 to selectively align with two positions of the fixed shells 23 by observing the two protrusions on the cartridge 29, and aligns the left fixed shell 23 and the front fixed shell 23 with the connecting shell. When the connecting holes 24 are aligned, the liquid pump 38 is connected to the liquefied natural gas tank 31 through the second connecting pipe 310 and the first connecting pipe 36. When the left fixed shell 23 and the rear fixed shell 23 are aligned with the limit groove 34, the air pump 37 and the liquefied natural gas tank 31 are connected. When it is necessary to fix the diverter cylinder 22 to turn, the turning handle 211 is released, and the clamping cylinder 29 is driven to be clamped into the clamping groove 28 under the elastic reset of the spring 210. The elasticity of the spring 210 is utilized. The staff rotates the diverter cylinder 22 by pulling up the turning handle 211 to connect the two connecting holes 24 with the two fixed shells 23, and cooperates with the liquid unloading mechanism 3 to complete the liquid unloading and constant gas pressure of the liquefied natural gas tank 31. There is no need to adjust and use multiple valves to divert the pipeline to complete the safety protection operation of balancing the air pressure, which improves the convenience of the device and avoids the situation where the risk of excessive liquid unloading time increases.

[0034] By setting up the liquid unloading mechanism 3, the staff first puts the connecting sleeve 33 on the air outlet pipe 32. Under the limiting action of the limiting groove 34 and the first connecting pipe 36, the staff rotates the connecting sleeve 33 so that it is threadedly connected to the air outlet pipe 32, driving the first connecting pipe 36 to align and fix with the air outlet pipe 32, and uses the regulating mechanism 2 to connect the second connecting pipe 310 at the liquid pump 38 with the first connecting pipe 36. The valve on the liquefied natural gas tank 31 is rotated to drive the liquid pump 38 to pump the liquefied natural gas in the liquefied natural gas tank 31 into the liquefied natural gas tank 31. The staff observes the pressure gauge on the liquefied natural gas tank 31. When the air pressure in the liquefied natural gas tank 31 drops sharply to a dangerous peak, the staff rotates the regulating mechanism 2 to align the second connecting pipe 310 of the air pump 37 with the first connecting pipe 36. The connecting pipe 36 is connected, and a small amount of gasified natural gas in the liquid unloading tank 39 is transported into the liquefied natural gas tank 31 by driving the air pump 37 to keep the air pressure in the liquefied natural gas tank 31 constant. When the air pressure in the liquefied natural gas tank 31 is stable, the liquid pump 38 is connected to the liquefied natural gas tank 31 again through the adjustment of the regulating mechanism 2 to carry out the liquid unloading operation, thereby realizing the selective adjustment of the connection between the two second connecting pipes 310 and the first connecting pipe 36 in cooperation with the regulating mechanism 2. The liquefied natural gas in the liquefied natural gas tank 31 is driven by the liquid pump 38 to complete the liquid unloading process, and the air pump 37 is driven to transport a small amount of gasified natural gas in the liquid unloading tank 39 into the liquefied natural gas tank 31 to maintain the air pressure in the liquefied natural gas tank 31 constant, thereby playing a role of safety protection and further improving the practicality of the device.

[0035] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0036] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments do not describe all details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A liquefied natural gas unloading safety protection device, comprising a movable plate (1), on which an adjustment mechanism (2) and a liquid unloading mechanism (3) are provided, characterized in that: The regulating mechanism (2) includes a diversion component and a self-locking component. The diversion component includes a sealing cylinder (21) fixedly connected to the top surface of the movable plate (1). The inner wall of the sealing cylinder (21) is rotatably connected to the diversion cylinder (22). The outer wall of the sealing cylinder (21) is fixedly connected to a plurality of fixed sleeves (23). The outer wall of the diversion cylinder (22) is provided with two connecting holes (24). The top surface of the diversion cylinder (22) is fixedly connected to a rotating shaft (25). The outer wall of the rotating shaft (25) is rotatably connected to the inner wall of the sealing cylinder (21).

2. A liquefied natural gas unloading safety protection device according to claim 1, characterized in that: The self-locking assembly comprises a rectangular shaft (26) fixedly connected to the top of the rotating shaft (25); the top of the rectangular shaft (26) is fixedly connected to a top block (27); the top surface of the sealing cylinder (21) is provided with a card slot (28); the inner wall of the card slot (28) is slidably connected to a card cylinder (29).

3. A liquefied natural gas unloading safety protection device according to claim 2, characterized in that: The inner wall of the cartridge (29) is slidably connected to the outer wall of the rectangular shaft (26); the top end of the cartridge (29) is fixedly connected to a spring (210); the top end of the spring (210) is fixedly connected to the bottom surface of the top block (27); and the outer wall of the cartridge (29) is fixedly connected to a turning handle (211).

4. A liquefied natural gas unloading safety protection device according to claim 3, characterized in that: The liquid unloading mechanism (3) comprises a connecting assembly, a limiting assembly and a liquid unloading assembly. The connecting assembly comprises a liquefied natural gas tank (31) arranged on the left side of the movable plate (1). The output end of the liquefied natural gas tank (31) is fixedly connected to an air outlet pipe (32). The outer wall of the air outlet pipe (32) is threadedly connected to a connecting sleeve (33).

5. A liquefied natural gas unloading safety protection device according to claim 4, characterized in that: The limiting assembly comprises a limiting groove (34) provided on the inner wall of the connecting sleeve (33); the inner wall of the limiting groove (34) is rotatably connected to a limiting ring (35); the inner wall of the limiting ring (35) is fixedly connected to a first connecting tube (36); the end of the first connecting tube (36) is fixedly connected to the inner wall of the fixed sleeve (23) located on the left side.

6. A liquefied natural gas unloading safety protection device according to claim 5, characterized in that: The liquid unloading assembly comprises an air pump (37) fixedly connected to the top surface of the movable plate (1), a liquid pump (38) fixedly connected to the top surface of the movable plate (1), a liquid unloading tank (39) fixedly connected to the top surface of the movable plate (1), and a second connecting pipe (310) fixedly connected to the inner walls of the fixed housing (23) at the front and rear sides, and the end of the second connecting pipe (310) at the front side is fixedly connected to the left output end of the liquid pump (38).

7. A liquefied natural gas unloading safety protection device according to claim 6, characterized in that: The end of the second connecting pipe (310) located at the rear side is fixedly connected to the left output end of the air pump (37), the right output ends of the air pump (37) and the liquid pump (38) are both fixedly connected to the third connecting pipe (311), the ends of the two third connecting pipes (311) are both fixedly connected to the outer wall of the liquid unloading tank (39), and the right side of the movable plate (1) is fixedly connected to a push-pull handle (312).

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