LNG (Liquefied Natural Gas) filling equipment and LNG filling equipment

Abstract

The utility model provides LNG (Liquefied Natural Gas) filling equipment and LNG filling equipment, the LNG filling equipment comprises a storage tank and a pipeline system, and the pipeline system comprises a supercharger, a mass flow meter, a filling pipeline and a filling pipeline. Wherein the filling pipeline is communicated with the storage tank, so that LNG is filled into the storage tank through the filling pipeline, and it is guaranteed that LNG is stored in the storage tank. The mass flow meter communicates with the bottom of the storage tank, and the filling pipeline communicates with the mass flow meter so that the LNG filling equipment can be filled with LNG outwards. Meanwhile, the supercharger communicates with the top of the storage tank, and the mass flow meter communicates with the supercharger to form a pre-cooling loop, so that the supercharger can drive the LNG to circularly flow among the supercharger, the mass flow meter and the storage tank, the LNG can pre-cool the mass flow meter, and then it is ensured that the mass flow meter can be within the working temperature; and the metering accuracy of the mass flow meter is ensured, so that the LNG filling precision of the LNG filling equipment is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of LNG storage and transportation, in particular to LNG filling equipment and LNG filling equipment. Background Art

[0002] Liquefied natural gas (LNG) is a fossil energy source. In addition to being used as fuel for power plants, factories, and household users, the methane contained in LNG can be used as chemical raw materials for manufacturing fertilizers, methanol solvents, and synthetic acetic acid, making the scope of LNG use increasingly wider.

[0003] In recent years, the price of LNG has been lower than that of diesel, making gas-powered vehicles have lower operating costs and stronger profitability than diesel vehicles. As a result, natural gas trucks have gradually become the mainstream model in the transportation field, and LNG on-board bottles are particularly popular among users.

[0004] However, LNG filling stations and LNG pump trucks that are specifically used to fill LNG vehicle-mounted bottles are not suitable for filling gas engineering vehicles used in field operations due to factors such as high investment and maintenance costs and geographical restrictions, thus affecting the use of vehicles that use natural gas as fuel. Utility Model Content

[0005] The purpose of the utility model is to provide an LNG filling device, which can simplify the LNG filling process so that the LNG filling device can integrate LNG storage, transportation and filling into one, and facilitate the filling and metering of LNG equipment such as LNG vehicles.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] According to one aspect of the utility model, the utility model provides an LNG filling device, which includes: a storage tank, which is used to store LNG; a pipeline system, which is connected to the storage tank; the pipeline system includes a supercharger, a mass flowmeter, a filling pipeline, and a charging pipeline; the filling pipeline is connected to the storage tank so that LNG can be filled into the storage tank; the input end of the mass flowmeter is connected to the bottom of the storage tank; the filling pipeline is connected to the mass flowmeter so that LNG can be filled out through the filling pipeline; the supercharger can drive the flow of LNG; wherein the output end of the supercharger is connected to the top of the storage tank, and the mass flowmeter and the supercharger can be connected and form a pre-cooling circuit, so that LNG can circulate between the mass flowmeter, the supercharger and the storage tank, and the mass flowmeter is pre-cooled so that the temperature of the mass flowmeter is lower than a preset temperature.

[0008] In one embodiment of the present application, the pipeline system is also provided with a controller and a plurality of control valves; the plurality of control valves are respectively arranged on the filling pipeline, the charging pipeline and the pre-cooling circuit, and are electrically connected to the controller so that the controller can control the connection or disconnection of the filling pipeline, the charging pipeline and the pre-cooling circuit through the control valves.

[0009] In one embodiment of the present application, the controller is also electrically connected to the supercharger to control the operation or stop of the supercharger; the mass flowmeter is electrically connected to the controller so as to be able to feed back the temperature signal of the mass flowmeter to the controller, and enable the controller to control the connection or disconnection of the pre-cooling circuit according to the temperature signal; wherein, in the process of the filling pipeline filling LNG externally, when the temperature signal is higher than the preset temperature, the controller controls the pre-cooling circuit to be connected and controls the filling pipeline to be disconnected, and the controller controls the supercharger to operate so that LNG can flow through the mass flowmeter and cool down the mass flowmeter; when the temperature signal is lower than the preset temperature, the controller controls the supercharger to stop and controls the pre-cooling circuit to be disconnected, and the controller controls the filling pipeline to be connected so that LNG can be filled externally.

[0010] In one embodiment of the present application, the input end of the supercharger is also connected to the bottom of the storage tank, so that a boosting circuit is formed between the storage tank and the supercharger; the supercharger can vaporize liquid LNG into gaseous LNG and return it to the storage tank to increase the pressure of the LNG in the storage tank.

[0011] In one embodiment of the present application, the filling pipeline is also connected to the storage tank through the pressure booster, so that the filling pipeline can fill the storage tank with LNG through the pressure booster.

[0012] In one embodiment of the present application, the pipeline system also includes a balancing pipeline and a venting component; the balancing pipeline is connected to the storage tank to balance the pressure in the storage tank during the filling or charging process; the venting component is connected to the top of the storage tank to release the gaseous medium in the storage tank.

[0013] In one embodiment of the present application, the LNG filling equipment also includes a pressure gauge and a liquid level gauge; the pressure gauge is connected to the top of the storage tank to display the medium pressure in the storage tank; the liquid level gauge is connected to the top and bottom of the storage tank to display the liquid level height in the storage tank.

[0014] In one embodiment of the present application, the storage tank includes an inner shell and an outer shell; the outer shell is provided with a accommodating cavity; the inner shell is provided with a storage cavity for storing LNG; the inner shell is accommodated in the accommodating cavity, and an isolation space is formed between the inner shell and the outer shell to isolate heat conduction between the inner shell and the outer shell.

[0015] The present application also discloses an LNG filling device, which includes a box body and any one of the LNG filling devices described above; a first installation cavity and a second installation cavity are arranged in the box body, and the first installation cavity and the second installation cavity are arranged side by side along the length direction of the box body; the storage tank and the pipeline system are respectively fixed in the first installation cavity and the second installation cavity.

[0016] In one embodiment of the present application, the LNG filling equipment also includes two saddles; the saddle is fixed to the bottom of the storage tank and extends downward from the first mounting cavity, and the two saddles are spaced apart along the length direction of the storage tank to support the storage tank.

[0017] It can be seen from the above technical solution that the utility model has at least the following advantages and positive effects:

[0018] In the utility model, the LNG filling equipment includes a storage tank and a pipeline system, and the pipeline system includes a booster, a mass flow meter, a filling pipeline and a filling pipeline. Among them, the filling pipeline is connected to the storage tank to fill LNG into the storage tank through the filling pipeline to ensure that LNG is stored in the storage tank. The mass flow meter is connected to the bottom of the storage tank, and the filling pipeline is connected to the mass flow meter, so that the LNG filling equipment can fill LNG outward.

[0019] At the same time, the supercharger is connected to the top of the storage tank, and the mass flow meter and the supercharger are connected to form a pre-cooling circuit, so that the supercharger can drive the LNG to circulate between the supercharger, the mass flow meter and the storage tank, so that the LNG can pre-cool the mass flow meter, thereby ensuring that the mass flow meter can be within the operating temperature, ensuring the accuracy of the mass flow meter's measurement, and thus ensuring the accuracy of the LNG filling equipment in filling LNG externally. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the LNG filling equipment according to an embodiment of the present utility model.

[0021] Figure 2 yes Figure 1 Schematic diagram of a side view of an LNG bunkering equipment.

[0022] Figure 3 yes Figure 1 Schematic diagram of a bottom view of the LNG bunkering equipment.

[0023] Figure 4 It is a schematic diagram of the principle of the LNG filling equipment of the embodiment of the utility model.

[0024] The following are the descriptions of the reference numerals:

[0025] 1-box; 2-first installation cavity; 3-second installation cavity; 4-saddle; 10-storage tank; 11-inner shell; 12-outer shell; 13-isolation space; 14-vacuum pipeline; 21-booster; 22-mass flow meter; 23-filling pipeline; 24-charging pipeline; 25-precooling circuit; 26-boosting circuit; 27-balance pipeline; 28-venting component; 31-pressure gauge; 32-liquid level meter. DETAILED DESCRIPTION

[0026] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially for illustrative purposes rather than for limiting the present invention.

[0027] In the description of the present invention, it should be understood that in the embodiments shown in the drawings, the indications of directions or positional relationships (such as up, down, left, right, front and back, etc.) are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the descriptions of the positions of these elements change, the indications of these directions also change accordingly.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] In recent years, the price of LNG is lower than that of diesel, which makes gas-powered vehicles have lower operating costs and stronger profitability than diesel vehicles. Benefiting from this, natural gas trucks have gradually become the mainstream vehicle in the transportation field, and LNG on-board bottles are particularly popular among users. However, LNG filling stations and LNG pump trucks that are dedicated to filling LNG on-board bottles are not suitable for filling gas engineering vehicles for field operations due to factors such as high investment costs and high maintenance costs and geographical restrictions, thus affecting the use of vehicles that use natural gas as fuel. Therefore, a LNG filling device and LNG filling device are proposed to solve the above problems.

[0030] The scheme is further illustrated by the following examples:

[0031] Figure 1 It is a schematic diagram of the LNG filling equipment according to an embodiment of the present utility model. Figure 2 yes Figure 1 Schematic diagram of a side view of an LNG bunkering equipment. Figure 3 yes Figure 1 Schematic diagram of a bottom view of the LNG bunkering equipment. Figure 4 It is a schematic diagram of the principle of the LNG filling equipment of the embodiment of the utility model.

[0032] See also Figure 1-3 The LNG filling equipment of this embodiment may include a box body 1 and an LNG filling equipment. Among them, a first installation cavity 2 and a second installation cavity 3 may be provided in the box body 1, and the first installation cavity 2 and the second installation cavity 3 are arranged side by side along the length direction of the box body 1. The LNG filling equipment can be used to fill LNG externally. Specifically, the LNG filling equipment may include a storage tank 10 and a pipeline system, and the storage tank 10 and the pipeline system are respectively fixed in the first installation cavity 2 and the second installation cavity 3 to achieve centralized arrangement, facilitate operation and maintenance by operators, and optimize the space utilization in the box body 1, so that the filling equipment can be compact and convenient for the movement and transportation of the box body 1.

[0033] In this embodiment, the box body 1 can be set as a standard container to facilitate the movement and transportation of the box body 1. At the same time, the standard container can also be provided with a first installation cavity 2 and a second installation cavity 3, which are used to install the storage tank 10 and the pipeline system respectively. Among them, the storage tank 10 is arranged horizontally to facilitate the transportation of the storage tank 10.

[0034] It should be noted that, in practical applications, the booster 21 in the pipeline system may also be disposed in the first installation cavity 2 , and the booster 21 is disposed below the storage tank 10 , so as to fully utilize the space inside the box body 1 .

[0035] In some other embodiments, the box body 1 may also be configured as a frame structure, and the outer dimensions of the frame structure are the outer dimensions of a standard container, so as to facilitate the movement and handling of the box body 1. At the same time, the head of the storage tank 10 is welded to the frame structure so that the storage tank 10 can be firmly connected to the frame structure, so that the storage tank 10 can be hoisted by the frame structure. Specifically, when the storage tank 10 is in an empty state, the LNG filling equipment can be hoisted by the frame, so as to facilitate the movement of the LNG filling equipment.

[0036] See also Figure 1 and Figure 3The LNG filling equipment may further include two saddles 4. The saddle 4 is fixed to the bottom of the storage tank 10 and extends downward from the first mounting cavity 2, and the two saddles 4 are arranged at intervals along the length direction of the storage tank 10 to support the storage tank 10, ensuring that the saddle 4 can support the storage tank 10 when the storage tank 10 is fully loaded with LNG, and avoiding the case 1 being unable to support the storage tank 10 when the storage tank 10 is fully loaded.

[0037] In addition, a container-type double-door may be provided on the second installation cavity 3 to facilitate operators to operate and use the pipeline system located in the second installation cavity 3 through the double-door.

[0038] In this embodiment, the LNG filling equipment may further include a traveling mechanism. The traveling mechanism is used to drive the LNG filling equipment to move, so that the LNG filling equipment can break through geographical restrictions and meet the demand for refueling engineering vehicles using LNG as fuel anytime and anywhere. Specifically, the traveling mechanism can be set as a skeleton vehicle or a tractor vehicle for transporting standard containers, so as to drive the LNG filling equipment to transfer, thereby meeting the customer's demand for filling LNG.

[0039] Of course, in some other embodiments, the LNG filling equipment can be placed directly on the flat ground, so as to be used as a fixed storage and simple filling station, thereby saving the construction cost of the LNG filling station.

[0040] See also Figure 4 The LNG filling equipment of the present application may include a storage tank 10 and a pipeline system. The pipeline system is connected to the storage tank 10 so as to be able to add LNG to the storage tank 10 or to be able to fill the LNG in the storage tank 10 to the outside.

[0041] The storage tank 10 can be used to store LNG, so that the LNG filling equipment can carry LNG and serve as a source for external filling of LNG. In some other embodiments, the storage tank 10 can also be used to store cryogenic media such as liquid hydrogen, liquid methane, etc.

[0042] In this embodiment, the storage tank 10 may include an inner shell 11 and an outer shell 12. Specifically, the outer shell 12 is provided with a receiving cavity. The inner shell 11 is provided with a storage cavity for storing LNG. The inner shell 11 is accommodated in the receiving cavity, and an isolation space 13 is formed between the inner shell 11 and the outer shell 12 to isolate heat conduction between the inner shell 11 and the outer shell 12. At the same time, both the inner shell 11 and the outer shell 12 can be made of low-temperature resistant metal materials.

[0043] In actual use, the isolation space 13 is set to a vacuum state to ensure the heat insulation effect between the inner shell 11 and the outer shell 12, and whether the LNG in the inner shell 11 leaks can be detected through the isolation space 13. In addition, the storage tank 10 can also include a vacuum pipeline 14, which is used to connect to a vacuum device to evacuate the isolation space 13.

[0044] See also Figure 4 The pipeline system may include a supercharger 21 , a mass flow meter 22 , a filling pipeline 23 and a charging pipeline 24 .

[0045] The filling pipeline 23 may be connected to the storage tank 10 so as to fill the storage tank 10 with LNG. That is, external LNG may be transferred to the storage tank 10 through the filling pipeline 23 .

[0046] The input end of the mass flow meter 22 can be connected to the bottom of the storage tank 10, so that the LNG in the storage tank 10 can flow through the mass flow meter 22. The mass flow meter 22 has a real-time detection function and can convert the detected temperature signal and flow signal into an electrical signal.

[0047] The filling pipeline 24 can be connected to the mass flow meter 22 to fill LNG externally through the filling pipeline 24, thereby transferring the LNG in the storage tank 10 to the storage tank to be filled, thereby completing the external filling of LNG. Specifically, the filling pipeline 24 can be connected to a liquid filling gun to facilitate external filling of LNG.

[0048] The pressure booster 21 is connected to the storage tank 10 and can drive the LNG to flow so that the LNG can move along the pipeline.

[0049] In this embodiment, the mass flow meter 22 and the supercharger 21 can be connected. And the mass flow meter 22, the supercharger 21 and the storage tank 10 are connected to form a pre-cooling circuit 25, so that the LNG in the storage tank 10 can circulate between the mass flow meter 22, the supercharger 21 and the storage tank 10 under the drive of the supercharger 21. At the same time, since the LNG in the storage tank 10 is in a low temperature state, when the LNG flows through the mass flow meter 22, the low temperature LNG can pre-cool the mass flow meter 22, thereby making the temperature of the mass flow meter 22 lower than the preset temperature, so that the mass flow meter 22 is operated at a suitable temperature, ensuring the stability and accuracy of the mass flow meter 22 detection.

[0050] It should be noted that the preset temperature can be set according to the temperature range required for the actual operation of the mass flow meter 22, so that the mass flow meter 22 after cooling is within the temperature range, ensuring that the mass flow meter 22 can work efficiently.

[0051] See also Figure 4 The pipeline system may also be provided with a controller and a plurality of control valves.

[0052] Among them, multiple control valves are respectively arranged on the filling pipeline 23, the charging pipeline 24 and the pre-cooling circuit 25, and are electrically connected to the controller, so that the controller can control the connection or disconnection of the filling pipeline 23, the charging pipeline 24 and the pre-cooling circuit 25 through the control valves.

[0053] It should be noted that the controller can be integrated in the control cabinet, and the control cabinet can be installed in the second installation cavity 3 of the box body 1 to facilitate the operator to operate and control. Among them, the controller can be powered by a separate battery pack or connected to a vehicle battery for power supply to ensure the operation of the controller.

[0054] In addition, the control valve can be set as a solenoid valve or a pneumatic valve to control the on-off of the pipeline or circuit. When the control valve is set as a solenoid valve, the control valve can be powered by a separate battery pack or connected to a vehicle battery to ensure the operation of the control valve. When the control valve is set as a pneumatic valve, the control valve can be connected to a separate gas cylinder as a gas source for driving control work.

[0055] In this embodiment, the controller can also be electrically connected to the supercharger 21 to control the operation or stop of the supercharger 21. At the same time, the mass flow meter 22 can be electrically connected to the controller so that the mass flow meter 22 can feed back the temperature signal and flow signal detected by it to the controller, and the controller can control the connection or disconnection of the precooling circuit 25 according to the temperature signal.

[0056] Specifically, when the filling pipeline 24 is filling LNG, when the temperature signal is higher than the preset temperature, that is, when the temperature of the mass flow meter 22 is higher than the preset temperature, the controller controls the precooling circuit 25 to be connected, and controls the filling pipeline 24 to be disconnected, so as to prevent the filling pipeline 24 from filling LNG. At the same time, the controller controls the supercharger 21 to work, so that LNG can flow through the mass flow meter 22, and the LNG can cool the mass flow meter 22.

[0057] When the temperature signal fed back by the mass flow meter 22 is lower than the preset temperature, the controller stops the supercharger 21 and disconnects the precooling circuit 25 to stop the LNG from flowing along the precooling circuit 25. At the same time, the controller connects the filling pipeline 24 to enable LNG to be filled externally.

[0058] In this embodiment, the input end of the supercharger 21 can be connected to the bottom of the storage tank 10, that is, the input end of the supercharger 21 can be connected to the liquid phase interval in the storage tank 10. At the same time, the output end of the supercharger 21 can be connected to the top of the storage tank 10, that is, the output end of the supercharger 21 can be connected to the gas phase interval in the storage tank 10. Therefore, a booster loop 26 can be formed between the storage tank 10 and the supercharger 21. Specifically, the supercharger 21 can also gasify the liquid LNG into gaseous LNG, and make the gaseous LNG flow back into the storage tank 10 along the booster loop 26, thereby increasing the pressure of the LNG in the storage tank 10, so that the pressure in the storage tank 10 meets the filling pressure required by the customer, thereby improving the efficiency of the LNG filling equipment to fill LNG outward.

[0059] It should be noted that, since the pressures in the tanks of the filling objects are different, and the pressure of the LNG in the storage tank 10 also changes with the number of fillings, the pressure difference between the pressure in the storage tank 10 and the pressure in the filling object tank is not fixed. Therefore, in order to improve the filling efficiency, the pressure difference between the two needs to be increased. Converting the liquid LNG in the storage tank 10 into gaseous LNG can increase the pressure in the storage tank 10, thereby increasing the pressure difference between the two, and thus ensuring the filling efficiency.

[0060] See also Figure 4 The filling pipeline 23 is also connected to the storage tank 10 through the supercharger 21, so that the filling pipeline 23 can fill LNG into the storage tank 10 through the supercharger 21, so that external LNG can be filled into the storage tank 10 through the supercharger 21, thereby improving the filling efficiency.

[0061] At the same time, the pipeline system may also include a balancing pipeline 27 and a relief component 28. Specifically, the balancing pipeline 27 is connected to the storage tank 10 to balance the pressure in the storage tank 10 during the filling or charging process. That is, during the filling or charging of LNG, the storage tank 10 and the external storage tank are connected through the balancing pipeline 27, so that the balance between the two tanks is generated, thereby improving the efficiency of the filling or charging of LNG. At the same time, the relief component 28 is connected to the top of the storage tank 10 to release the gas phase medium in the storage tank 10. When the gas pressure in the storage tank 10 is too high, the pressure in the storage tank 10 is released by the relief component 28, which can ensure the safe use of the storage tank 10.

[0062] In addition, the LNG filling equipment may also include a pressure gauge 31 and a liquid level gauge 32. The pressure gauge 31 is connected to the top of the storage tank 10 to display the medium pressure in the storage tank 10, and the liquid level gauge 32 is connected to the top and bottom of the storage tank 10 to display the liquid level in the storage tank 10, so as to facilitate the staff to observe the liquid level and air pressure in the storage tank 10 and ensure the safety of the storage tank 10.

[0063] It should be noted that the LNG filling equipment may also include an explosion-proof lamp and a combustible gas alarm, and the explosion-proof lamp and the combustible gas alarm are connected to a controller, and the controller controls the switch of the explosion-proof lamp. At the same time, when the combustible gas alarm detects the leakage of combustible gas, the controller automatically cuts off all control valves to ensure the safety of the storage tank 10.

[0064] In summary, the LNG filling equipment of the LNG filling equipment can be integrated in the box body 1, and the box body 1 and the LNG filling equipment can be moved by the skeleton vehicle, so that the LNG filling equipment can be transferred, thus breaking through the geographical restrictions. At the same time, the storage tank 10 in the LNG filling equipment can store LNG, and the pipeline system is connected to the storage tank 10, so that the storage tank 10 can be filled or charged with LNG through the pipeline system. Therefore, the LNG filling equipment can fill LNG for engineering vehicles and the like anytime and anywhere, thereby facilitating the use of LNG.

[0065] Although the utility model has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the utility model can be implemented in a variety of forms without departing from the spirit or essence of the utility model, it should be understood that the above-mentioned embodiments are not limited to any of the aforementioned details, but should be widely interpreted within the spirit and scope defined by the attached claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the attached claims.

Claims

1. An LNG filling equipment, characterized in that: include: Storage tanks for storing LNG; a pipeline system connected to the storage tank; the pipeline system includes a booster, a mass flow meter, a filling pipeline, and a charging pipeline; the filling pipeline is connected to the storage tank so that LNG can be charged into the storage tank; the input end of the mass flow meter is connected to the bottom of the storage tank; the charging pipeline is connected to the mass flow meter so that LNG can be charged outward through the charging pipeline; The booster is capable of driving the flow of LNG; The output end of the supercharger is connected to the top of the storage tank, and the mass flow meter and the supercharger can be connected to form a pre-cooling circuit, so that LNG can circulate between the mass flow meter, the supercharger and the storage tank, and the mass flow meter is pre-cooled so that the temperature of the mass flow meter is lower than a preset temperature.

2. The LNG filling equipment according to claim 1, characterized in that: The pipeline system is also provided with a controller and a plurality of control valves; the plurality of control valves are respectively arranged on the filling pipeline, the charging pipeline and the pre-cooling circuit, and are electrically connected to the controller so that the controller can control the connection or disconnection of the filling pipeline, the charging pipeline and the pre-cooling circuit through the control valves.

3. The LNG filling equipment according to claim 2, characterized in that: The controller is also electrically connected to the supercharger to control the operation or stop of the supercharger; the mass flow meter is electrically connected to the controller to be able to feed back a temperature signal of the mass flow meter to the controller, and enable the controller to control the connection or disconnection of the precooling circuit according to the temperature signal; Wherein, during the process of the filling pipeline being filled with LNG, when the temperature signal is higher than the preset temperature, the controller controls the precooling circuit to be connected and controls the filling pipeline to be disconnected, and the controller controls the supercharger to operate so that LNG can flow through the mass flow meter and cool the mass flow meter; When the temperature signal is lower than the preset temperature, the controller controls the supercharger to stop and controls the precooling circuit to be disconnected, and the controller controls the filling pipeline to be connected so that LNG can be filled externally.

4. The LNG filling equipment according to claim 1, characterized in that: The input end of the supercharger is also connected to the bottom of the storage tank, so that a supercharging circuit is formed between the storage tank and the supercharger; the supercharger can gasify liquid LNG into gaseous LNG and return it to the storage tank to increase the pressure of the LNG in the storage tank.

5. The LNG filling equipment according to claim 1, characterized in that: The filling pipeline is also connected to the storage tank through the pressure booster, so that the filling pipeline can fill the storage tank with LNG through the pressure booster.

6. The LNG filling equipment according to claim 1, characterized in that: The pipeline system also includes a balancing pipeline and a relief component; the balancing pipeline is connected to the storage tank to balance the pressure in the storage tank during the filling or charging process; the relief component is connected to the top of the storage tank to relieve the gaseous medium in the storage tank.

7. The LNG filling equipment according to claim 1, characterized in that: It also includes a pressure gauge and a liquid level gauge; the pressure gauge is connected to the top of the storage tank to display the medium pressure in the storage tank; the liquid level gauge is connected to the top and bottom of the storage tank to display the liquid level height in the storage tank.

8. The LNG filling equipment according to claim 1, characterized in that: The storage tank includes an inner shell and an outer shell; the outer shell is provided with a containing cavity; the inner shell is provided with a storage cavity for storing LNG; the inner shell is accommodated in the containing cavity, and an isolation space is formed between the inner shell and the outer shell to isolate heat conduction between the inner shell and the outer shell.

9. An LNG filling equipment, characterized in that: It comprises a box body, and the LNG filling equipment as described in any one of claims 1-8; a first installation cavity and a second installation cavity are arranged in the box body, and the first installation cavity and the second installation cavity are arranged side by side along the length direction of the box body; the storage tank and the pipeline system are fixed in the first installation cavity and the second installation cavity respectively.

10. The LNG filling equipment according to claim 9, characterized in that: It also includes two saddles; the saddles are fixed to the bottom of the storage tank and extend downwardly out of the first installation cavity, and the two saddles are spaced apart along the length direction of the storage tank to support the storage tank.

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