LNG (Liquefied Natural Gas) filling station

Abstract

The utility model relates to the technical field of traffic transportation, and provides an LNG filling station which comprises a gas filling cabinet and a conveying pipeline, the two ends of the conveying pipeline are fixedly connected with a first conical head and a second conical head respectively, an air bag is arranged in the conveying pipeline, the air bag is fixedly connected to the inner surface of the first conical head and the inner surface of the second conical head, and the first conical head and the second conical head are fixedly connected. A plurality of leading-in pipes are fixedly connected to the outer surface of the first conical head in the tangential direction, a first collecting box is fixedly connected to the sides, away from the first conical head, of the multiple leading-in pipes, an air inlet pipe is fixedly connected to the outer surface of the first collecting box, and a plurality of leading-out pipes are fixedly connected to the outer surface of the second conical head in the tangential direction. The spiral hot air heats the air bag, the possibility of freezing in the air bag is prevented, meanwhile, the spiral hot air can accelerate flowing of the liquefied natural gas, the staying time of the liquefied natural gas in the conveying pipeline is shortened, and the possibility of freezing in the conveying pipeline is further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of transportation, in particular to an LNG filling station. Background Technique

[0002] LNG filling stations support the operation of clean energy vehicles by storing and filling LNG, promote the green transformation of the transportation industry, reduce costs, improve safety, and drive the development of related industries.

[0003] Nowadays, when transporting LNG products inside the filling pipeline of an LNG filling station, the temperature is usually much lower than normal temperature. Therefore, when there is a trace amount of moisture inside the filling pipeline, these moisture will condense into ice crystals due to the sharp drop in temperature. The ice crystals formed by condensation will gradually accumulate and hinder the normal flow of LNG.

[0004] Freezing inside the pipeline will cause blockage, reduce the flow rate of LNG, increase the pipeline pressure, affect normal transportation, and completely block the pipeline in severe cases, interrupt the supply, and may cause equipment damage and safety hazards, reducing the user experience. Content of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide an LNG filling station to solve the problems put forward in the above background technique.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme: an LNG filling station, comprising: a filling cabinet and a conveying pipeline. The two ends of the conveying pipeline are respectively fixedly connected with a first conical head and a second conical head. An airbag is arranged inside the conveying pipeline, and the airbag is fixedly connected to the inner surfaces of the first conical head and the second conical head. A plurality of inlet pipes are fixedly connected to the tangential direction of the outer surface of the first conical head. One side of the plurality of inlet pipes away from the first conical head is fixedly connected with a first header tank. An inlet pipe is fixedly connected to the outer surface of the first header tank. A plurality of outlet pipes are fixedly connected to the tangential direction of the outer surface of the second conical head. One side of the plurality of outlet pipes away from the second conical head is fixedly connected with a second header tank. An outlet pipe is fixedly connected to the outer surface of the second header tank;

[0007] A heating mechanism is arranged on the outer surface of the inlet pipe, and a marking mechanism is arranged on the outer surface of the conveying pipeline. The spiral hot air heats the airbag, preventing the possibility of freezing inside the airbag. At the same time, the spiral hot air can accelerate the flow of liquefied natural gas and reduce the residence time of liquefied natural gas inside the conveying pipeline.

[0008] As a preferred embodiment, the heating mechanism includes a heating cabinet. The outer surface of the heating cabinet near the top is fixedly connected to an intake pipe, and the outer surface of the heating cabinet near the bottom is fixedly connected to an air inlet pipe. A plurality of heating tubes are fixedly connected to the inner wall of the heating cabinet, and the heating tubes can heat the air.

[0009] As a preferred embodiment, the airbag divides the conveying pipeline, the first conical head and the second conical head into two cavities. The outer cavity is the first cavity for conveying hot air, and the inner cavity is the second cavity for conveying liquefied natural gas, so that the flow of hot air and liquefied natural gas does not directly contact.

[0010] As a preferred embodiment, one side of the first conical head away from the conveying pipeline is fixedly connected to a connecting pipe, one side of the connecting pipe away from the first conical head is fixedly connected to a gas filling cabinet, and one side of the second conical head away from the conveying pipeline is fixedly connected to a gas filling pipe. The connecting pipe and the gas filling pipe are short, which is convenient for the short transfer of heat on the connecting pipe and the gas filling pipe.

[0011] As a preferred embodiment, the marking mechanism includes a signboard fixedly connected to the outer surface of the conveying pipeline, and a medium flow arrow is arranged on the outer surface of the signboard. The medium flow arrow can determine the installation direction of the conveying pipeline.

[0012] As a preferred embodiment, the airbag is made of silica gel. Silica gel has elasticity and can exert a uniform thrust on the liquefied natural gas under the pressure of the spiral hot air, accelerating the flow of the liquefied natural gas to a certain extent.

[0013] As a preferred embodiment, an exhaust pipe is fixedly connected to the top of the heating cabinet, and a safety valve is arranged on the outer surface of the exhaust pipe. The exhaust pipe can discharge the excess gas.

[0014] Compared with the prior art, the advantages and positive effects of the present utility model are as follows:

[0015] The present utility model utilizes the flow of spiral hot air inside the airbag, which not only heats the airbag and prevents the possibility of freezing inside the airbag, but also the spiral hot air can accelerate the flow of liquefied natural gas, reducing the residence time of liquefied natural gas inside the conveying pipeline and further reducing the possibility of freezing inside the conveying pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the main structure of an LNG filling station provided by the present utility model;

[0017] Figure 2 It is a schematic diagram of the internal structure of an LNG filling station provided by the present utility model;

[0018] Figure 3 Schematic diagram of the position structure of the heating pipe for an LNG filling station provided by the present utility model;

[0019] Legend description:

[0020] 1. Gas filling cabinet; 2. Inlet pipe; 3. Header one; 4. Introduction pipe; 5. Conical head one; 6. Delivery pipeline; 7. Header two; 8. Outlet pipe; 9. Conical head two; 10. Outlet gas pipe; 11. Connecting pipe; 12. Gas filling pipe; 13. Airbag; 14. Sign board; 15. Medium flow arrow; 16. Heating cabinet; 17. Air inlet duct; 18. Heating pipe; 19. Exhaust pipe. Specific implementation manners

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] Please refer to Figures 1-3 , the present utility model provides a technical solution: an LNG filling station, including: a gas filling cabinet 1 and a delivery pipeline 6. Both ends of the delivery pipeline 6 are fixedly connected with a conical head one 5 and a conical head two 9 respectively. An airbag 13 is arranged inside the delivery pipeline 6, and the airbag 13 is fixedly connected to the inner surfaces of the conical head one 5 and the conical head two 9. A plurality of introduction pipes 4 are fixedly connected to the tangential direction of the outer surface of the conical head one 5. One side of the plurality of introduction pipes 4 away from the conical head one 5 is fixedly connected with a header one 3. An inlet pipe 2 is fixedly connected to the outer surface of the header one 3. A plurality of outlet pipes 8 are fixedly connected to the tangential direction of the outer surface of the conical head two 9. One side of the plurality of outlet pipes 8 away from the conical head two 9 is fixedly connected with a header two 7. An outlet gas pipe 10 is fixedly connected to the outer surface of the header two 7;

[0023] A heating mechanism is arranged on the outer surface of the inlet pipe 2, and a marking mechanism is arranged on the outer surface of the delivery pipeline 6. The spiral hot air heats the airbag 13, preventing the possibility of freezing inside the airbag 13. At the same time, the spiral hot air can accelerate the flow of liquefied natural gas, reducing the residence time of liquefied natural gas inside the delivery pipeline 6 and further reducing the possibility of freezing inside the delivery pipeline 6.

[0024] Such as Figures 1-3As shown in the figure, the heating mechanism includes a heating cabinet 16. The outer surface of the heating cabinet 16 near the top is fixedly connected to the intake pipe 2. The outer surface of the heating cabinet 16 near the bottom is fixedly connected to an air inlet pipe 17. A plurality of heating tubes 18 are fixedly connected to the inner wall of the heating cabinet 16. The heating tubes 18 can heat the air to form hot air.

[0025] As Figures 1-3 shown in the figure, the airbag 13 divides the conveying pipeline 6, the first conical head 5 and the second conical head 9 into two cavities. The outer cavity is the first cavity for conveying hot air, and the inner cavity is the second cavity for conveying liquefied natural gas. The airbag 13 can divide the conveying pipeline 6 into two spaces, so that the hot air and the liquefied natural gas do not come into direct contact during the flow.

[0026] As Figures 1-3 shown in the figure, a connecting pipe 11 is fixedly connected to the side of the first conical head 5 away from the conveying pipeline 6. The side of the connecting pipe 11 away from the first conical head 5 is fixedly connected to a gas filling cabinet 1. A gas filling pipe 12 is fixedly connected to the side of the second conical head 9 away from the conveying pipeline 6. The connecting pipe 11 and the gas filling pipe 12 are relatively short. The connecting pipe 11 and the gas filling pipe 12 are relatively short, which is convenient for the short-term transfer of heat on the connecting pipe 11 and the gas filling pipe 12, and prevents freezing inside the connecting pipe 11 and the gas filling pipe 12.

[0027] As Figures 1-3 shown in the figure, the identification mechanism includes an identification plate 14. The identification plate 14 is fixedly connected to the outer surface of the conveying pipeline 6. A medium flow arrow 15 is arranged on the outer surface of the identification plate 14. The medium flow arrow 15 can determine the installation direction of the conveying pipeline 6, which is convenient for installation.

[0028] As Figures 1-3 shown in the figure, the airbag 13 is made of silica gel. Silica gel has elasticity and can exert a uniform thrust on the liquefied natural gas under the pressure of the spiral hot air, accelerating the flow of the liquefied natural gas to a certain extent and reducing the residence time of the liquefied natural gas inside the conveying pipeline 6.

[0029] As Figures 1-3 shown in the figure, an exhaust pipe 19 is fixedly connected to the top of the heating cabinet 16. A safety valve is arranged on the outer surface of the exhaust pipe 19. The exhaust pipe 19 can discharge the excess gas to ensure the stable operation of the equipment.

[0030] Working principle: This equipment is an LNG filling station. The medium flow arrow 15 on the identification plate 14 can determine the installation direction of the conveying pipeline 6, and the exhaust pipe 19 can discharge the excess gas. During use, air is sent into the heating cabinet 16 through the air inlet pipe 17, and then the air absorbs the heat on the heating tubes 18 to form hot air, and then the hot air enters the first header 3 through the intake pipe 2.

[0031] After stabilizing the pressure in header 1-3, hot air enters into cone head 1-5 in the direction tangent to the cone head 1-5 through the inlet pipe 4. Since the initial flow direction of the hot air is tangent, the hot air rotates along the circumference when entering the interior of cone head 1-5. This rotation forms spiral hot air inside cone head 1-5. When the spiral hot air reaches the conveying pipeline 6 through cone head 1-5, the spiral hot air is compressed inside cone head 1-5, increasing the flow rate of the spiral hot air. The hot air can heat the airbag 13. The heated hot air will enter the outlet pipe 8 through cone head 2-9, then enter header 2-7, and be discharged from the outlet pipe 10, avoiding the freezing of the residues inside the airbag 13 and ensuring the stable transportation of liquefied natural gas.

[0032] Then start the gas filling cabinet 1. The gas filling cabinet 1 feeds the liquefied natural gas into the airbag 13 through the connecting pipe 11, then into the gas filling pipe 12 through the airbag 13, and finally leads it out. When transporting the liquefied natural gas, the high-flow spiral hot air forms a central low-pressure area inside the airbag 13 and a high-pressure area on the periphery. The pressure of the peripheral high-pressure area is evenly transmitted to the liquefied natural gas inside the airbag 13 through the wall of the airbag 13, thereby forming a uniform thrust on the outside of the airbag 13 and accelerating the flow of the liquefied natural gas.

[0033] The above are only the preferred embodiments of the present invention, and do not limit the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. An LNG filling station, comprising: An air filling cabinet (1) and a conveying pipeline (6), characterized in that: both ends of the conveying pipeline (6) are fixedly connected with a first conical head (5) and a second conical head (9) respectively; an airbag (13) is arranged inside the conveying pipeline (6), and the airbag (13) is fixedly connected to the inner surfaces of the first conical head (5) and the second conical head (9); a plurality of inlet pipes (4) are fixedly connected in the tangential direction of the outer surface of the first conical head (5), and one side of the plurality of inlet pipes (4) away from the first conical head (5) is fixedly connected with a first header (3), and an inlet air pipe (2) is fixedly connected to the outer surface of the first header (3); a plurality of outlet pipes (8) are fixedly connected in the tangential direction of the outer surface of the second conical head (9), and one side of the plurality of outlet pipes (8) away from the second conical head (9) is fixedly connected with a second header (7), and an outlet air pipe (10) is fixedly connected to the outer surface of the second header (7). A heating mechanism is arranged on the outer surface of the inlet air pipe (2), and a marking mechanism is arranged on the outer surface of the conveying pipeline (6).

2. The LNG filling station according to claim 1, characterized in that: The heating mechanism includes a heating cabinet (16), the outer surface of the heating cabinet (16) near the top is fixedly connected with the inlet air pipe (2), the outer surface of the heating cabinet (16) near the bottom is fixedly connected with an air inlet pipe (17), and a plurality of heating pipes (18) are fixedly connected to the inner wall of the heating cabinet (16).

3. A LNG filling station according to claim 1, characterized in that: The airbag (13) divides the conveying pipeline (6), the first conical head (5) and the second conical head (9) into two cavities. The outer cavity is the first cavity for conveying hot air, and the inner cavity is the second cavity for conveying liquefied natural gas.

4. A kind of LNG filling station according to claim 1, characterized in that: One side of the first conical head (5) away from the conveying pipeline (6) is fixedly connected with a connecting pipe (11), one side of the connecting pipe (11) away from the first conical head (5) is fixedly connected with the air filling cabinet (1), one side of the second conical head (9) away from the conveying pipeline (6) is fixedly connected with a gas filling pipe (12), and the connecting pipe (11) and the gas filling pipe (12) are relatively short.

5. A LNG filling station according to claim 1, characterized in that: The marking mechanism includes a signboard (14), the signboard (14) is fixedly connected to the outer surface of the conveying pipeline (6), and a medium flow direction arrow (15) is arranged on the outer surface of the signboard (14).

6. The LNG filling station according to claim 1, characterized in that: The material of the airbag (13) is silica gel.

7. A LNG refueling station according to claim 2, characterized in that: An exhaust pipe (19) is fixedly connected to the top of the heating cabinet (16), and a safety valve is arranged on the outer surface of the exhaust pipe (19).

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